EP1106723A1 - Hydrophilic cotton skin cleansing article having two different external surfaces - Google Patents
Hydrophilic cotton skin cleansing article having two different external surfaces Download PDFInfo
- Publication number
- EP1106723A1 EP1106723A1 EP99403057A EP99403057A EP1106723A1 EP 1106723 A1 EP1106723 A1 EP 1106723A1 EP 99403057 A EP99403057 A EP 99403057A EP 99403057 A EP99403057 A EP 99403057A EP 1106723 A1 EP1106723 A1 EP 1106723A1
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- European Patent Office
- Prior art keywords
- tampon
- fibers
- cotton
- products
- streaks
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/44—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling
- D04H1/46—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres
- D04H1/492—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres by fluid jet
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/02—Cotton wool; Wadding
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/04—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres having existing or potential cohesive properties, e.g. natural fibres, prestretched or fibrillated artificial fibres
- D04H1/08—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres having existing or potential cohesive properties, e.g. natural fibres, prestretched or fibrillated artificial fibres and hardened by felting; Felts or felted products
- D04H1/10—Felts made from mixtures of fibres
- D04H1/12—Felts made from mixtures of fibres and incorporating artificial organic fibres
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
- D04H1/4266—Natural fibres not provided for in group D04H1/425
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/44—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling
- D04H1/46—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres
- D04H1/492—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres by fluid jet
- D04H1/495—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres by fluid jet for formation of patterns, e.g. drilling or rearrangement
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/44—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling
- D04H1/46—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres
- D04H1/498—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres entanglement of layered webs
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/54—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving
- D04H1/542—Adhesive fibres
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H13/00—Other non-woven fabrics
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H18/00—Needling machines
- D04H18/04—Needling machines with water jets
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M23/00—Treatment of fibres, threads, yarns, fabrics or fibrous goods made from such materials, characterised by the process
- D06M23/06—Processes in which the treating agent is dispersed in a gas, e.g. aerosols
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
- Y10T442/20—Coated or impregnated woven, knit, or nonwoven fabric which is not [a] associated with another preformed layer or fiber layer or, [b] with respect to woven and knit, characterized, respectively, by a particular or differential weave or knit, wherein the coating or impregnation is neither a foamed material nor a free metal or alloy layer
- Y10T442/2525—Coating or impregnation functions biologically [e.g., insect repellent, antiseptic, insecticide, bactericide, etc.]
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
- Y10T442/60—Nonwoven fabric [i.e., nonwoven strand or fiber material]
- Y10T442/659—Including an additional nonwoven fabric
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
- Y10T442/60—Nonwoven fabric [i.e., nonwoven strand or fiber material]
- Y10T442/659—Including an additional nonwoven fabric
- Y10T442/666—Mechanically interengaged by needling or impingement of fluid [e.g., gas or liquid stream, etc.]
Definitions
- the invention relates to a pad based on cotton wool, having a basis weight of at least 150 g / m 2 , comprising two different faces and intended for skin care.
- cotton wool pad includes everything product cut into a format which essentially comprises cotton fibers in a proportion ranging from 70 to 100 percent cotton fiber and 0 to 30 percent cotton artificial or synthetic fibers. These are for example fibers polyolefins hot-melt.
- Skin care includes body care, facial care, and more particularly beauty treatments using cosmetic products: make-up removal and face makeup, baby care: toilet and change baby, etc.
- cotton wool pads or products on the market are in the form of cut formats: round (commonly referred to as make-up discs), oval or square. They are often composed of a mixture of cotton fibers of different qualities or a mixture of cotton fibers and other fibers depending on the product sought or the manufacturing process used. They're from homogeneous composition throughout their thickness and have external structural faces and identical compositions. They are symmetrical.
- Certain products marketed for cosmetic use have two sides different: they are two-sided. But the two sides are often distinguished essentially visually and not always functionally.
- a first tampon (D) comprises a tablecloth consisting of a superposition carded sails, itself surrounded by two outer carded sails previously calendered. The association can be done by collage. The two sails exterior can be differentiated by the more or less important calendering and the case if necessary, by a printed motif.
- a second buffer (E) consists of a sheet also consisting of a superimposition of card webs on which a hydrolied nonwoven is deposited, before cutting.
- the hydrolied nonwoven is a mixture of artificial fibers and fibers synthetic and more precisely viscose and polyester.
- European patent application No. 0 750 062 describes articles cleansing the skin, which are both gentle to the skin and sufficiently resistant to allow friction on the skin without causing irritation or lesions on the latter. The rubbing action allows the elimination of impurities and dead cells from the surface of the skin.
- These articles include a nonwoven substrate, preferably hydrolyzed, having a grammage of 20 to 150 g / m 2 , characterized by a specific coefficient of friction.
- the substrate preferably comprises at least in part long fibers capable of emerging from the main surface under the action of friction while remaining attached to the substrate. It can be composed of a mixture of hydrophilic and hydrophobic fibers or of purely hydrophilic or purely hydrophobic fibers.
- At least one side of the substrate used essentially performs the function of cleaning the skin. It also serves as a support for cleansers or make-up removers such as lotions or toilet milks.
- the nonwoven substrate is associated with other layers made of different materials. If the cleaning article consists only of the nonwoven substrate, the two faces of the article are identical and cannot be distinguished. The article is then similar to a dry wipe, the two faces of which can be used interchangeably for cleaning the skin.
- French Patent No. 2,052,089 describes an element of wadding or cotton made up of at least two tablecloths of different qualities, held together either by padding, either by compression while remaining puffy and soft in contact with the skin.
- One side is more particularly suitable for a make-up removal and the other face completes makeup removal.
- the differentiation of the two faces is based here on the nature or quality of the two layers: they can be made of materials different or of the same material of different qualities. It is a product complex.
- the applicant in its French patent application N ° 99 07612 not yet published describes a product made one hundred percent of cotton wool fibers comprising at least first and second outer layers, the first layer consisting of fine fibers with a low micron index forming a soft face and the second layer consisting of fibers having an index higher micronaire forming a cleaning face, called "scratching".
- the faces are differentiate by the nature of cotton fibers.
- the subject of European patent application No. 0 405 043 is a buffer for applying and / or removing liquid or semi-solid substances, comprising at least three superimposed layers of absorbent fibrous material such as cotton.
- Each of the two outer layers is compressed by uniform tightening over the entire face layer and may have additional compression zones by marking a pattern.
- the central layer is not compressed and forms the heart absorbent buffer.
- the three layers are superimposed so as to form a sandwich structure.
- the two external faces can have different patterns and be more or less compressed.
- This product intended for the application of a cream or a liquid is not sufficiently resistant if it is used for make-up removal or skin cleansing. Indeed, friction forces are exerted on the skin with the pad moreover, supports a wetting product on its surface.
- the cohesion between the layers is insufficient, due to the sandwich structure of the product: three separate layers superimposed and linked by their edges.
- Another object of the invention is to provide a tampon where the two faces are differentiated without changing the nature of the cotton fibers or the quality of the cotton, the differentiation being made not only on the surface of the pad but for one of the sides in the thickness of the tampon.
- the invention also aims to provide a resistant pad and keeping a good cohesion.
- Another object of the invention is to provide a hydrophilic cotton pad having a basis weight of at least 150 g / m 2 which has two separate faces, one intended for skin care, in particular for cleansing the skin and to the application of cosmetic make-up or make-up removal products, and the other, softer and more absorbent, intended to absorb the excess of product applied.
- the user can distinguish the faces in use: by touch, in contact with the skin or by applying skin care products, and also visually.
- the invention further aims to obtain a tampon whose face intended for skin care, allows to receive aqueous cosmetic products in delaying their absorption and penetration into the buffer.
- the invention also aims to provide methods of manufacturing these pads, simple, avoiding the preparation of cotton tablecloths of composition and complex structure.
- the subject of the invention is a cotton wool pad intended for skin care, having a grammage of at least 150 g / m 2 and comprising two different external faces of which the fibers are linked.
- the first external face comprises recessed ridges with a spacing e 1 between the ridges between 1 and 8 mm and a depth p of striation of at least 0.25 mm and in that the tensile strength of the tampon is at least 20 N in the running direction and at least 16 N in the transverse direction according to a test method given in the description which follows.
- the first external face comprises recessed ridges with a spacing e 1 between the ridges of between 1 and 8 mm and a depth p of striation of at least 0.25 mm and in that '' at least 50 percent of the fibers are bound.
- the spacing e 1 between the ridges of the first face is between 1.2 and 5.5 mm and preferably between 2 and 4 mm.
- the depth p of the streaks of the first face is at least 0.40 mm and preferably at least 0.50 mm.
- At least 60 percent of the pad fibers are tied.
- the first external face of the pad comprises a agent delaying the absorption of these aqueous products.
- the invention also relates to methods of manufacturing the tampon. cotton wool according to the invention.
- a first method consists in supplying a cotton tablecloth, hydrolying a first external face of the tablecloth by means of water jets whose axes are spaced from one another by a distance between 1 and 5.5 mm with a contribution in energy of at least 1.4 x 10 -3 kwh / m 2 , and hydrolyze the other external face of the water table by means of water jets whose axes are spaced by a distance between 0.4 and 1.2 mm with an energy input of at least 0.9 x 10 -3 kwh / m 2 .
- a second method consists in providing at least two cotton tablecloths hydrophilic from bleached fibers laid or laundered, mark the first layer so as to print streaks with a spacing between streaks between 1 and 8 mm and a streak depth of at least 0.25 mm on one side of the first layer, the marking pressure being sufficient to obtain a buffer resistance of at least 20 N in the running direction and of at least 16 N in transverse direction according to the test method given in the description which follows, mark or consolidate the second layer, and associate the two layers thus obtained, the two marked and / or consolidated faces being located outside the tampon.
- the tampon according to the invention is a cut product of round, oval, square or any other shape. It has a grammage between 150 and 400 g / m 2 and preferably between 180 and 300 g / m 2 . It is cotton-based and consists mainly of absorbent hydrophilic cotton fibers. More specifically, it comprises from 70 to 100 percent of cotton fibers of homogeneous quality and from 0 to 30 percent of artificial fibers such as viscose fibers, synthetic fibers such as polyester fibers, bicomponent fibers (polyester / polyester, polypropylene / polypropylene or polyester / polypropylene), or mixtures thereof.
- the pad comprises a sheet, monolayer or multilayer, formed of fibers of cotton. It can comprise two superimposed layers, each formed of a layer of cotton.
- the tampon can also consist of three layers, a central layer formed of a layer of cotton fibers and two outer layers constituted by example of cotton card veils surrounding the central layer.
- the tampon 1 comprises a first external face (2, 2 ') and a second external face (3, 3').
- the first external face (2, 2 ') comprises ridges (4, 4'), (5, 5 ') and (6, 6') here arranged parallel to each other.
- the spacing e 1 between the ridges is between 1 and 8 millimeters, preferably between 1.2 and 5.5 millimeters and more preferably between 2 and 4 millimeters.
- the depth p of the ridges is at least 0.25 millimeter, preferably at least 0.50 millimeter.
- the streaks form hollows (7, 7 ') and bumps (8, 8') visible to the naked eye.
- the second external face (3, 3 ') also includes ridges 9 and 10 which are much thinner and closer to each other.
- the spacing e2 between the ridges of this second face is between 0.4 and 1.2 millimeters.
- the depth of the streaks is smaller on this second side, compared to that from the first side. In certain embodiments of the tampon, it is of the order 0.1 millimeter.
- FIGS. 4A, 4B, 4C and 4D illustrate other embodiments of the buffer according to the invention.
- the streaks may form on the surface of the first external face (2, 2 ') of the solid lines ( Figures 1, 4A and 4B), broken lines (Figure 4C), lines straight ( Figure 1), curved lines ( Figure 4A) or broken lines ( Figure 4B).
- Another essential characteristic of the tampon according to the invention is its particularly high tensile strength in both forward and reverse directions through, in comparison to other known products. Because of this resistance, the pad does not deform during use.
- the tensile strength corresponds to the resistance to tension measured on a test piece and defined by the test method described below.
- Samples or test pieces 57 millimeters long by 25 millimeters large are cut from buffers according to the invention.
- a first series of samples is cut so as to obtain the greatest length of the sample in the running direction in order to measure the resistance in the running direction.
- a second series of samples is cut so as to obtain the largest sample length crosswise to measure resistance in the direction through.
- the resistance is measured using a dynamometer.
- RT tensile strength
- Buffers B, C, D, E and F illustrate the state of the art.
- the tensile strengths in running and cross direction are very significantly higher for buffers A according to the invention compared to those of buffers B, C, D, E and F. This resistance results in use by an absence of deformation of the tampon.
- the pads according to the invention have a tensile strength in the running direction at least 20 Newtons and a transverse tensile strength of at least 15 Newtons.
- the resistance to pull in the cross direction approaches the tensile strength in the run direction.
- the product according to the invention is homogeneous and advantageously has a certain symmetry with respect to tensile strength and deformation in the forward direction by relation to the cross direction. The product is called "square".
- the elongation under a constant force of 5 Newtons was also measured using the same material as that of the tensile strength test.
- the pads according to the invention have the lowest elongation.
- Yet another essential characteristic of the tampon is the percentage of bonded fibers compared to known cotton wool pads.
- the pads according to the invention at least 50% of the fibers are bound, preferably 60%.
- the mass of bonded fibers was measured on the surface of the tampon by following the method below.
- the quantity of fibers bound in the buffer according to the invention is multiplied by two or even three compared to the amount of fiber bound in art pads prior.
- the fibers located on the surface have at least one point of fixing in the thickness of the buffer. This allows to structure the first side of the stamp and give it a permanent relief.
- the cohesion of the tampon according to the invention is significantly improved compared to to prior art products.
- Buffers A according to the invention here made of one hundred percent cotton fibers, have resistance to delamination similar to that of a product (buffer F) made of 15% fiber hot-melt and 85% cotton fiber.
- the first side of the tampon according to the invention lint much less than some known products.
- the lint resistance of the first side of pads A was measured and state of the art buffers B, C, D, E and F using a method specific described below.
- the pads are disc-shaped and have a diameter about 57 millimeters.
- the method is to use a rubber finger mounted on a cylinder to simulate friction on the skin.
- This finger is set in motion in order to come land on the surface of a tampon and move on its surface.
- the first external face A1 has been tested as well as the second external face A2.
- the mass of fibers is divided by 10 for the first face of the pads according to the invention, with respect to the mass measured for the buffers B, C, D and F.
- the buffer E has a lint-free side due to the presence of the nonwoven, but another side excessively fluffy compared to the second side of the pad according to the invention. The reduction in linting is therefore very significant for the tampon according to the invention.
- the mass of commonly used disc-shaped cotton pads varies between 0.5 and 0.7 grams.
- the fibers recovered from the first face (A1) of the five buffers A according to the invention therefore correspond to 0.1% of the mass of the buffer A.
- the fibers recovered from the five each of types B, C, D and F of the state of the art amount to 1% of the mass of corresponding buffers.
- the first side of the tampon therefore has a new structure, providing advantageous properties.
- the tampon according to the invention has numerous advantages in use.
- the first side is used to apply skincare products to the skin.
- the product is applied cosmetic on the first side of the pad then we pass this first side on the skin or face.
- the structure of the first face comprising ridges advantageously forms a relief in relief and in bump.
- the surface in contact with the skin is more limited due to the relief.
- the prominent bump part increases the pressures on the skin and the forces friction. The friction effect thus obtained improves cleaning.
- the hollow parts form an additional reserve of available product.
- the same hollow When the tampon passes over the skin, the same hollow first fills for function that of the product reservoir which comes to spread in contact with the pad on the skin, under the application pressure, then that of an impurity collector at during the displacement of the tampon on the skin. Cleaning done by the first passage is thus optimized.
- the displacement of the tampon on the skin is preferentially made perpendicular to the striations of the first face.
- the second side is used to absorb impurities, excess product and traces of makeup that remain on the skin.
- the product does not deform, it has an excellent grip.
- the solvent that conventionally penetrates the tampon is less absorbed in depth and is more easily restored during cleaning, thanks to the more compact on the first side of the pad and with fibers tightened in the thickness of the buffer.
- the solvent is thus used more effectively to dissolve the varnish covering the nails.
- the relief of the first face in contact with the skin has a massaging effect during passage of the tampon and provides a relaxing effect for the skin.
- the first external face may include an agent delaying the absorption of these products allowing to temporarily keep the products applied on the surface of the tampon without them getting inside the tampon.
- the absorption delaying agent is a component based on softeners or waxes or a component that attaches to the fibers.
- softeners are fatty amines, fatty alcohols, fatty esters, fatty polyethylenes or polyamides or their mixtures.
- the components which attach to the fibers are, for example, metal salts stearic acid complexes, perfluorinated derivatives, zirconium salts or silicones.
- the wax-based components are emulsions of waxes and paraffins or wax emulsions alone.
- the agent is a natural wax emulsion, of mineral origin, vegetable or animal.
- animal wax examples include spermaceti wax and wax bee.
- plant-based wax examples include candellila wax and carnauba.
- wax of mineral origin examples include ceresin and azocerite.
- the beeswax emulsion is particularly advantageous and suitable for cosmetic use of the tampon. It is a dermatologically tested component. It's about a cationic bleached beeswax emulsion which comprises beeswax, water, emulsifying agents, glyceryl stearate and diethanolaminoether stearate.
- the beeswax itself is composed of esters of waxy fatty acids such as myricyl palmitate, cerotic acid and other homologous waxy acids and small amounts of hydrocarbons, cholesterol esters and ceryl alcohols.
- the agent delaying absorption is an emulsion or dispersion comprising at least minus 30% of active ingredients.
- the first face of the cotton product or pad according to the invention comprises at least 1 g / m 2 of applied emulsion, that is to say at least 0.3 g / m 2 of active ingredients deposited.
- the first face comprising on the surface such an agent acquires very advantageous.
- a simple test highlighting this property consists in depositing on the surface a container filled with water, at room temperature (around 20 °), tampons as well treated according to the invention, the treated side facing outwards and the face absorbent towards water, and prior art buffers B and C. The first ones remain on the surface for at least 5 minutes, the others almost soak up water instantly and are very quickly submerged, usually after 3 to 5 seconds.
- the advantage thus obtained is to be able to keep the products on the surface more for a long time and use the total amount of product deposited on the tampon to skin care, without loss of product and without deformation of the tampon.
- a test of internal use at the requesting company was carried out by 25 people usually and exclusively using cotton wool pads C for skin care, make-up removal, etc ...
- a pads according to the invention, the first side of which has been treated with an agent delaying absorption, have been tested compared to tampons according to the invention the first side of which has not been treated and with C buffers of the state of the art.
- the pads according to the invention For the pads according to the invention, the first side of which has not been treated, 50% of people noted a delay in the absorption of the care products deposited in surface of these pads. This is explained by the specific structure of the first face pads according to the invention. In fact, the fibers are more tight in thickness buffer.
- the pads according to the invention As for the pads according to the invention, the first face of which has been treated, almost all people: 92%, noted this capacity of the buffer to delay absorption of skincare products.
- a first technique consists in differentiating the two faces of the tampon by hydrolizing each of the faces according to different parameters.
- a first method consists in manufacturing by layering at least two layers of cotton fibers forming the two outer layers. These sheets may be of the same or different fiber quality. They can be made directly from hydrophilic and bleached cotton. They can also be obtained from unbleached raw cotton, then chemically treated to obtain hydrophilicity and bleaching. They are then superimposed and associated by any known means such as bonding means or mechanical means such as calendering or needling. The means of association can also be hydraulic.
- a good association can be obtained by impregnating the layers superimposed by any known conventional means such as passing through a bath impregnation, spraying, spilling a solution.
- This impregnation is associated with an expression compacting the water table and eliminating part of the quantity liquid contained in the wet sheet, for example by calendering or passing over a vacuum slot.
- a second method consists in preparing a layer of cotton fibers by pneumatic and to lay this tablecloth between two cotton card sails.
- a continuous method of manufacturing and associating plies is described by the patent European No. 0 681 621 in the name of the plaintiff.
- the hydroliage technique makes it possible to combine the layers or both tablecloths together, and to bind the surfaces of the tablecloth.
- the hydroliage is carried out at by means of high pressure water jets combined with vacuum expression, by means of of a device marketed by ICBT-PERFOJET, Grenoble, France.
- the two hydroliage stages corresponding to the treatment of each of the two external faces of the product, can intervene, in the case of an unbleached fiber which is going to be chemically treated, just after the impregnation step of the web as is described in European patent application No. 0 735 175. They can also be placed in the final rinsing phase according to European Patent No. 0 805 888 in the name of the plaintiff.
- the advantage here whatever the process, is to differentiate the faces by hydroliage, directly online.
- the two external faces are hydroleumed according to different parameters one after another on endless canvases or cylinders.
- the hydroliaging device includes a high pressure pump supplying an injector placed transversely to the running of the sheet or layer of fibers, over its entire width.
- the injector consists of a volume of pressurized water, closed by a blade of steel which is perforated with calibrated holes producing jets in the form of fines high pressure water needles projected perpendicular to the surface of the face external. These fine jets entangle the fibers and entrain the free fibers of the surface in the thickness of the product.
- the first external face it is possible, for example, to use a hydroliage device whose blade is perforated with a large distance between the holes: from 1 to 5.5 millimeters, preferably between 2 and 4 mm.
- the perforated holes in the blade (commonly called "strip") have a diameter ranging from 130 to 200 ⁇ m and preferably from 140 to 170 ⁇ m and are regularly spaced. If the position of the injector is fixed and the layers of cotton running under it, there is a series of parallel streaks or grooves on the surface of the product corresponding to the passage under the jets.
- the pressure exerted is high, at least 40 bars, preferably between 50 and 80 bars so as to dig deep streaks or grooves in the product.
- the energy input is at least 1.4 x 10 -3 kwh / m 2 and can vary between 1.4 x 10 -3 and 2.5 x 10 -3 kwh / m 2 depending on speed, pressure, hole diameter and spacing between holes.
- the first side thus hydroliated has a compact, very "structured” appearance, reliefs in hollow and hump.
- the surface finish thus obtained does not fluff at all.
- a hydroliage device using classic parameters with a blade perforated with holes spaced by a distance between 0.4 and 1.2 mm and preferably between 0.4 and 0.9 mm.
- the diameter of holes can range from 100 to 130 ⁇ m.
- the pressures exerted for speeds similar to those used for the treatment of the first face, are moderate: from 20 to 40 bars. This corresponds to an energy supply between 0.9 x 10 -3 and 1.6 x 10 -3 kwh / m 2 .
- the streaks obtained on the surface of the second face are much finer and shallow.
- the second external face has a less compact appearance, a soft and absorbent surface. It does not present reliefs visible to the naked eye, in hollow and bump.
- Additional differentiation can be made by printing by marking of the different patterns of the existing streaks on the first face.
- a second technique for manufacturing the tampon according to the invention consists in differentiate the two sides of the stamp by marking.
- Two tablecloths are prepared from bleached fibers laid in tablecloth or bleached tablecloths. They are then each marked passing between a cylinder engraved with a relief motif and a smooth counterpart to print this motif in the thickness of the tablecloth and form a hollow and more or less relief in relief deep on the surface of the sheets which will correspond to the external faces of the pad.
- the marking pressures exerted by the cylinders are sufficient to obtain the expected resistances for the buffer, i.e. a resistance of at least 20 N in direction of travel and at least 16 N in cross direction, as measured by the test described above.
- the tablecloths may contain synthetic hot-melt fibers. They are compressed by means of heated calenders which causes the fibers to bond by the fusion of hot-melt fibers and improves cohesion.
- the first layer can be marked by means of a cylinder which can include for example parallel bands in relief, perpendicular to the axis of the cylinder, forming parallel streaks on the surface of the product, these bands being spaced from a distance between 1 and 8 mm, preferably between 2 and 4 mm.
- the height bands corresponding to the depth of the ridges is at least 0.25 mm and preferably at least 0.50 mm.
- the second face can be marked by means of a cylinder comprising by example of parallel bands in relief, perpendicular to the axis of the cylinder, spaced from each other by a distance between 0.8 and 1.2 mm.
- the height of strips is less than 0.25 mm.
- any geometry and distribution of the streaks can be considered, in particular for the surface of the first ply in order to form a embossed and embossed relief at the level of the first face.
- FIG. 4D An example of a pattern produced by marking is illustrated in FIG. 4D.
- the circles corresponding to the printed pattern form recesses or cavities on the surface of the buffer.
- the second face can be calendered without pattern of marking or consolidated by any other known means such as hydroliage, spraying of binder, heating of hot-melt fibers if they are present.
- the two layers thus and marked and / or consolidated, are superimposed so that the marked and / or consolidated surfaces are located outside. They are associated for example by gluing with starch.
- the first external face is treated so as to delay the absorption of the products aqueous (care products, ...) for cosmetic use of tampons.
- this first face is treated by applying an agent delaying the absorption of aqueous products, previously described.
- a wax emulsion is applied in an amount of at least 1 g / m 2 , which amounts to depositing at least 0.3 g / m 2 of active material (waxes).
- This surface treatment is done by any conventional means, such as spraying. by means of nozzles, coating by means of a cylinder, rotogravure printing ...
- the products thus produced having differentiated faces, are then cut into formats and packed in flexible packaging or sachets.
- the stacked pads are more easily insulated each other. This makes it much easier for the user to extract the buffers one by one from the packaging once the pre-cut lid has been torn freeing opening the package.
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Abstract
Description
L'invention concerne un tampon à base de coton hydrophile, ayant un grammage d'au moins 150 g/m2, comportant deux faces différentes et destiné aux soins de la peau.The invention relates to a pad based on cotton wool, having a basis weight of at least 150 g / m 2 , comprising two different faces and intended for skin care.
Dans le texte qui suit, le terme "tampon de coton hydrophile" englobe tout produit découpé en format qui comprend essentiellement des fibres de coton dans une proportion allant de 70 à 100 pour cent de fibres de coton et de 0 à 30 pour cent de fibres artificielles ou synthétiques. Ces dernières sont par exemple des fibres thermofusibles à base de polyoléfines.In the following text, the term "cotton wool pad" includes everything product cut into a format which essentially comprises cotton fibers in a proportion ranging from 70 to 100 percent cotton fiber and 0 to 30 percent cotton artificial or synthetic fibers. These are for example fibers polyolefins hot-melt.
Les soins de la peau comprennent les soins du corps, les soins du visage, et plus particulièrement les soins de beauté utilisant des produits cosmétiques : le démaquillage et le maquillage du visage, les soins de bébé : toilette et change du bébé, etc.Skin care includes body care, facial care, and more particularly beauty treatments using cosmetic products: make-up removal and face makeup, baby care: toilet and change baby, etc.
La plupart des produits ou tampons de coton hydrophile présents sur le marché sont sous la forme de formats découpés : ronds (communément dénommés disques à démaquiller), ovales ou carrés. Ils sont souvent composés d'un mélange de fibres de coton de différentes qualités ou d'un mélange de fibres de coton et d'autres fibres selon le produit recherché ou le procédé de fabrication utilisé. Ils sont de composition homogène dans toute leur épaisseur et ont des faces externes de structure et de compositions identiques. Ils sont symétriques.Most cotton wool pads or products on the market are in the form of cut formats: round (commonly referred to as make-up discs), oval or square. They are often composed of a mixture of cotton fibers of different qualities or a mixture of cotton fibers and other fibers depending on the product sought or the manufacturing process used. They're from homogeneous composition throughout their thickness and have external structural faces and identical compositions. They are symmetrical.
Le plus souvent, il n'y a pas de différenciation d'usage entre les deux faces du produit. L'état de surface est le même sur les deux faces. On utilise par exemple indifféremment une face pour le démaquillage ou nettoyage de la peau en appliquant un produit de démaquillage ou lait de toilette et l'autre face pour absorber l'excédent de produit sans différence d'efficacité entre les faces. Lorsque l'on applique un produit cosmétique aqueux tel qu'un lait ou une émulsion sur la peau, une grande partie du produit est absorbée par le tampon.Most often, there is no differentiation in use between the two sides of the product. The surface finish is the same on both sides. We use for example indifferently one side for removing make-up or cleaning the skin by applying a make-up remover or toilet milk and the other side to absorb the excess of product with no difference in efficiency between the faces. When applying a aqueous cosmetic product such as milk or emulsion on the skin, large part of the product is absorbed by the tampon.
Certains produits commercialisés à usage cosmétique ont deux faces différentes : ils sont bifaces. Mais les deux faces se distinguent souvent essentiellement visuellement et non pas toujours fonctionnellement.Certain products marketed for cosmetic use have two sides different: they are two-sided. But the two sides are often distinguished essentially visually and not always functionally.
Un premier tampon (D) comprend une nappe constituée d'une superposition de voiles de carde, elle-même entourée de deux voiles extérieurs de carde préalablement calandrés. L'association peut se faire par collage. Les deux voiles extérieurs peuvent être différentiés par le calandrage plus ou moins important et le cas échéant, par un motif imprimé. A first tampon (D) comprises a tablecloth consisting of a superposition carded sails, itself surrounded by two outer carded sails previously calendered. The association can be done by collage. The two sails exterior can be differentiated by the more or less important calendering and the case if necessary, by a printed motif.
Un second tampon (E) se compose d'une nappe également constituée d'une superposition de voiles de carde sur laquelle est déposé un nontissé hydrolié, avant découpe.A second buffer (E) consists of a sheet also consisting of a superimposition of card webs on which a hydrolied nonwoven is deposited, before cutting.
Lorsque les voiles de cardes sont constitués de cent pour cent de fibres de coton, le nontissé hydrolié est un mélange de fibres artificielles et de fibres synthétiques et plus précisément de viscose et polyester.When the card webs are made of one hundred percent fiber cotton, the hydrolied nonwoven is a mixture of artificial fibers and fibers synthetic and more precisely viscose and polyester.
La nature du nontissé de surface est donc différente de celle de la nappe centrale dans ce dernier cas.The nature of the surface nonwoven is therefore different from that of the web. central in the latter case.
D'autres produits bifaces ont été décrits dans l'art antérieur.Other two-sided products have been described in the prior art.
Par exemple, dans le domaine des nontissés, la demande de brevet européen N° 0 750 062 décrit des articles nettoyant la peau, qui sont à la fois doux pour la peau et suffisamment résistants pour permettre le frottement sur la peau sans provoquer d'irritations ou de lésions sur cette dernière. L'action de frotter permet l'élimination des impuretés et des cellules mortes de la surface de la peau. Ces articles comportent un substrat en nontissé de préférence hydrolié, ayant un grammage de 20 à 150 g/m2, caractérisé par un coefficient de frottement spécifique. Le substrat comprend de préférence au moins en partie des fibres longues capables de se dégager de la surface principale sous l'action du frottement tout en restant attachées au substrat. Il peut être composé d'un mélange de fibres hydrophiles et hydrophobes ou de fibres purement hydrophiles ou purement hydrophobes. Au moins une face du substrat utilisé assure essentiellement la fonction de nettoyage de la peau. Elle sert également de support pour des produits nettoyants ou démaquillants tels que des lotions ou des laits de toilette. Dans le cas où l'article nettoyant la peau comporte deux faces différentes, le substrat en nontissé est associé à d'autres couches fabriquées dans des matériaux différents. Si l'article nettoyant n'est constitué que du substrat en nontissé, les deux faces de l'article sont identiques et ne se distinguent pas. L'article s'apparente alors à une lingette sèche dont les deux faces peuvent être utilisées indifféremment l'une de l'autre pour nettoyer la peau.For example, in the field of nonwovens, European patent application No. 0 750 062 describes articles cleansing the skin, which are both gentle to the skin and sufficiently resistant to allow friction on the skin without causing irritation or lesions on the latter. The rubbing action allows the elimination of impurities and dead cells from the surface of the skin. These articles include a nonwoven substrate, preferably hydrolyzed, having a grammage of 20 to 150 g / m 2 , characterized by a specific coefficient of friction. The substrate preferably comprises at least in part long fibers capable of emerging from the main surface under the action of friction while remaining attached to the substrate. It can be composed of a mixture of hydrophilic and hydrophobic fibers or of purely hydrophilic or purely hydrophobic fibers. At least one side of the substrate used essentially performs the function of cleaning the skin. It also serves as a support for cleansers or make-up removers such as lotions or toilet milks. In the case where the skin-cleaning article has two different faces, the nonwoven substrate is associated with other layers made of different materials. If the cleaning article consists only of the nonwoven substrate, the two faces of the article are identical and cannot be distinguished. The article is then similar to a dry wipe, the two faces of which can be used interchangeably for cleaning the skin.
Le brevet français N° 2 052 089 décrit un élément en ouate ou en coton constitué d'au moins deux nappes de qualités différentes, maintenues ensemble soit par matelassage, soit par compression tout en restant bouffant et doux au contact de la peau. Une des faces est plus spécialement appropriée à un pré-démaquillage et l'autre face complète le démaquillage. La différenciation des deux faces repose ici sur la nature ou la qualité des deux nappes : elles peuvent être constituées de matériaux différents ou d'un même matériau de qualités différentes. Il s'agit d'un produit complexe.French Patent No. 2,052,089 describes an element of wadding or cotton made up of at least two tablecloths of different qualities, held together either by padding, either by compression while remaining puffy and soft in contact with the skin. One side is more particularly suitable for a make-up removal and the other face completes makeup removal. The differentiation of the two faces is based here on the nature or quality of the two layers: they can be made of materials different or of the same material of different qualities. It is a product complex.
La demanderesse dans sa demande de brevet français N° 99 07612 non encore publiée décrit un produit constitué à cent pour cent de fibres de coton hydrophiles comprenant au moins une première et une seconde couches extérieures, la première couche étant constituée de fibres fines présentant un indice micronaire faible formant une face douce et la seconde couche étant constituée de fibres présentant un indice micronaire plus élevé formant une face nettoyante, dite « grattante ». Les faces se différencient par la nature des fibres de coton.The applicant in its French patent application N ° 99 07612 not yet published describes a product made one hundred percent of cotton wool fibers comprising at least first and second outer layers, the first layer consisting of fine fibers with a low micron index forming a soft face and the second layer consisting of fibers having an index higher micronaire forming a cleaning face, called "scratching". The faces are differentiate by the nature of cotton fibers.
La demande de brevet européen N° 0 405 043 a pour objet un tampon pour appliquer et/ou enlever des substances liquides ou semi-solides, comprenant au moins trois couches superposées en matière fibreuse absorbante telle que le coton. Chacune des deux couches externes est comprimée par un serrage uniforme sur la face entière de la couche et peut comporter des zones de compression supplémentaire par marquage d'un motif. La couche centrale n'est pas comprimée et forme le coeur absorbant du tampon. Les trois couches sont superposées de manière à former une structure sandwich. Les deux faces externes peuvent avoir des motifs différents et être plus ou moins comprimées. Ce produit destiné à l'application d'une crème ou d'un liquide n'est pas suffisamment résistant s'il est utilisé pour le démaquillage ou le nettoyage de la peau. En effet, des forces de friction sont exercées sur la peau avec le tampon qui plus est, supporte un produit mouillant sur sa surface. De plus, la cohésion des couches entre-elles est insuffisante, de part la structure sandwich du produit : trois couches distinctes superposées et liées par leurs bords.The subject of European patent application No. 0 405 043 is a buffer for applying and / or removing liquid or semi-solid substances, comprising at least three superimposed layers of absorbent fibrous material such as cotton. Each of the two outer layers is compressed by uniform tightening over the entire face layer and may have additional compression zones by marking a pattern. The central layer is not compressed and forms the heart absorbent buffer. The three layers are superimposed so as to form a sandwich structure. The two external faces can have different patterns and be more or less compressed. This product intended for the application of a cream or a liquid is not sufficiently resistant if it is used for make-up removal or skin cleansing. Indeed, friction forces are exerted on the skin with the pad moreover, supports a wetting product on its surface. In addition, the cohesion between the layers is insufficient, due to the sandwich structure of the product: three separate layers superimposed and linked by their edges.
Il ressort de ce qui précède qu'il n'existe pas de produit ou tampon de coton hydrophile, « épais », c'est à dire ayant un grammage d'au moins 150 g/m2, suffisamment résistant pour nettoyer efficacement la peau sans l'irriter et comportant deux faces externes différentes, ayant des caractéristiques et des propriétés différentes.It emerges from the above that there is no hydrophilic cotton product or pad, "thick", that is to say having a grammage of at least 150 g / m 2 , sufficiently resistant to clean the skin effectively. without irritating it and having two different external faces, having different characteristics and properties.
L'invention a encore pour but de fournir un tampon où les deux faces sont différenciées sans modifier la nature des fibres de coton ni la qualité des nappes de coton, la différenciation se faisant non seulement en surface du tampon mais pour l'une des faces dans l'épaisseur du tampon.Another object of the invention is to provide a tampon where the two faces are differentiated without changing the nature of the cotton fibers or the quality of the cotton, the differentiation being made not only on the surface of the pad but for one of the sides in the thickness of the tampon.
L'invention a aussi pour but de fournir un tampon résistant et gardant une bonne cohésion.The invention also aims to provide a resistant pad and keeping a good cohesion.
L'invention a encore pour but de fournir un tampon de coton hydrophile ayant un grammage d'au moins 150 g/m2 qui comporte deux faces distinctes, l'une destinée aux soins de la peau, en particulier au nettoyage de la peau et à l'application de produits cosmétiques de maquillage ou démaquillage, et l'autre plus douce et absorbante, destinée à absorber l'excédent de produit appliqué.Another object of the invention is to provide a hydrophilic cotton pad having a basis weight of at least 150 g / m 2 which has two separate faces, one intended for skin care, in particular for cleansing the skin and to the application of cosmetic make-up or make-up removal products, and the other, softer and more absorbent, intended to absorb the excess of product applied.
Pour le démaquillage, on recherche un tampon qui optimise l'efficacité du nettoyage à l'aide de produits démaquillants, en effectuant un seul passage du tampon sur la peau, en particulier de la face du tampon destinée à cet usage.For makeup removal, we look for a pad that optimizes the effectiveness of cleansing with make-up removers, using a single pass of the pad on the skin, in particular on the face of the tampon intended for this use.
L'utilisateur peut distinguer les faces à l'usage : au toucher, au contact de la peau ou en appliquant des produits de soins sur la peau, et également visuellement. The user can distinguish the faces in use: by touch, in contact with the skin or by applying skin care products, and also visually.
L'invention a pour but supplémentaire d'obtenir un tampon dont la face destinée aux soins de la peau, permet de recevoir des produits cosmétiques aqueux en retardant leur absorption et pénétration dans le tampon.The invention further aims to obtain a tampon whose face intended for skin care, allows to receive aqueous cosmetic products in delaying their absorption and penetration into the buffer.
L'invention a également pour but de fournir des procédés de fabrication de ces tampons, simples, évitant la préparation de nappes de coton de composition et de structure complexes.The invention also aims to provide methods of manufacturing these pads, simple, avoiding the preparation of cotton tablecloths of composition and complex structure.
L'invention a pour objet un tampon de coton hydrophile destiné aux soins de la peau, ayant un grammage d'au moins 150 g/m2 et comportant deux faces externes différentes dont les fibres sont liées.The subject of the invention is a cotton wool pad intended for skin care, having a grammage of at least 150 g / m 2 and comprising two different external faces of which the fibers are linked.
Selon une caractéristique essentielle de l'invention, la première face externe comprend des stries en creux avec un écartement e1 entre les stries compris entre 1 et 8 mm et une profondeur p de strie d'au moins 0,25 mm et en ce que la résistance à la traction du tampon est d'au moins 20 N en sens marche et d'au moins 16 N en sens travers selon une méthode de test donnée dans la description qui suit.According to an essential characteristic of the invention, the first external face comprises recessed ridges with a spacing e 1 between the ridges between 1 and 8 mm and a depth p of striation of at least 0.25 mm and in that the tensile strength of the tampon is at least 20 N in the running direction and at least 16 N in the transverse direction according to a test method given in the description which follows.
Selon une autre caractéristique essentielle de l'invention la première face externe comprend des stries en creux avec un écartement e1 entre les stries compris entre 1 et 8 mm et une profondeur p de strie d'au moins 0,25 mm et en ce qu'au moins 50 pour cent des fibres sont liées.According to another essential characteristic of the invention, the first external face comprises recessed ridges with a spacing e 1 between the ridges of between 1 and 8 mm and a depth p of striation of at least 0.25 mm and in that '' at least 50 percent of the fibers are bound.
Selon une caractéristique avantageuse de l'invention, l'écartement e1 entre les stries de la première face est compris entre 1,2 et 5,5 mm et de préférence entre 2 et 4 mm.According to an advantageous characteristic of the invention, the spacing e 1 between the ridges of the first face is between 1.2 and 5.5 mm and preferably between 2 and 4 mm.
Selon une caractéristique préférée de l'invention, la profondeur p des stries de la première face est d'au moins 0,40 mm et de préférence d'au moins 0,50 mm.According to a preferred characteristic of the invention, the depth p of the streaks of the first face is at least 0.40 mm and preferably at least 0.50 mm.
Selon encore une caractéristique de l'invention, au moins 60 pour cent des fibres du tampon sont liées.According to another characteristic of the invention, at least 60 percent of the pad fibers are tied.
Afin d'améliorer l'efficacité de l'application de produits aqueux tels que des produits cosmétiques sur la peau ou encore le nettoyage de la peau à l'aide de produits démaquillants aqueux, la première face externe du tampon comprend un agent retardant l'absorption de ces produits aqueux.In order to improve the effectiveness of the application of aqueous products such as cosmetic products on the skin or cleaning the skin using aqueous make-up removers, the first external face of the pad comprises a agent delaying the absorption of these aqueous products.
L'invention a également pour objet des procédés de fabrication du tampon de coton hydrophile selon l'invention.The invention also relates to methods of manufacturing the tampon. cotton wool according to the invention.
Un premier procédé consiste à fournir une nappe de coton, hydrolier une première face externe de la nappe au moyen de jets d'eau dont les axes sont espacés les uns des autres d'une distance comprise entre 1 et 5,5 mm avec un apport en énergie d'au moins 1,4 x 10-3 kwh/m2, et hydrolier l'autre face externe de la nappe au moyen de jets d'eau dont les axes sont espacés d'une distance comprise entre 0,4 et 1,2 mm avec un apport en énergie d'au moins 0,9 x 10-3 kwh/m2.A first method consists in supplying a cotton tablecloth, hydrolying a first external face of the tablecloth by means of water jets whose axes are spaced from one another by a distance between 1 and 5.5 mm with a contribution in energy of at least 1.4 x 10 -3 kwh / m 2 , and hydrolyze the other external face of the water table by means of water jets whose axes are spaced by a distance between 0.4 and 1.2 mm with an energy input of at least 0.9 x 10 -3 kwh / m 2 .
Un second procédé consiste à fournir au moins deux nappes de coton hydrophile à partir de fibres blanchies mises en nappe ou de nappes blanchies, marquer la première nappe de manière à imprimer des stries ayant un écartement entre les stries compris entre 1 et 8 mm et une profondeur de strie d'au moins 0,25 mm sur une face de la première nappe, la pression de marquage étant suffisante pour obtenir une résistance du tampon d'au moins 20 N en sens marche et d'au moins 16 N en sens travers selon la méthode de test donnée dans la description qui suit, marquer ou consolider la seconde nappe, et associer les deux nappes ainsi obtenues, les deux faces marquées et/ou consolidée étant situées à l'extérieur du tampon.A second method consists in providing at least two cotton tablecloths hydrophilic from bleached fibers laid or laundered, mark the first layer so as to print streaks with a spacing between streaks between 1 and 8 mm and a streak depth of at least 0.25 mm on one side of the first layer, the marking pressure being sufficient to obtain a buffer resistance of at least 20 N in the running direction and of at least 16 N in transverse direction according to the test method given in the description which follows, mark or consolidate the second layer, and associate the two layers thus obtained, the two marked and / or consolidated faces being located outside the tampon.
D'autres caractéristiques et avantages de l'invention apparaítront plus en détails dans la description qui suit et en référence aux dessins annexés dans lesquels :
- la figure 1 représente une vue en perspective d'un tampon selon l'invention ;
- la figure 2 représente une coupe transversale schématique suivant la ligne II-II du tampon représenté à la figure 1 ;
- la figure 3A représente une vue agrandie du tampon représenté à la figure 2, au niveau d'une strie, qui correspond à un mode de réalisation utilisant la technique d'hydroliage,
- la figure 3B représente une vue agrandie d'un tampon correspondant à un autre mode de réalisation utilisant la technique de marquage ; et
- les figures 4A, 4B, 4C et 4D représentent différents états de surface illustrant des tampons selon l'invention.
- Figure 1 shows a perspective view of a tampon according to the invention;
- 2 shows a schematic cross section along line II-II of the tampon shown in Figure 1;
- FIG. 3A represents an enlarged view of the buffer represented in FIG. 2, at the level of a streak, which corresponds to an embodiment using the hydroliage technique,
- FIG. 3B represents an enlarged view of a buffer corresponding to another embodiment using the marking technique; and
- FIGS. 4A, 4B, 4C and 4D represent different surface states illustrating pads according to the invention.
Le tampon selon l'invention est un produit découpé de forme ronde, ovale, carré ou toute autre forme. Il a un grammage compris entre 150 et 400 g/m2 et de préférence entre 180 et 300 g/m2. Il est à base de coton et comprend essentiellement des fibres de coton hydrophiles absorbantes. Plus précisément, il comprend de 70 à 100 pour cent de fibres de coton de qualité homogène et de 0 à 30 pour cent de fibres artificielles telles que des fibres de viscose, de fibres synthétiques telles que des fibres de polyester, des fibres bicomposantes (polyester/polyester, polypropylène/polypropylène ou polyester/polypropylène), ou leurs mélanges.The tampon according to the invention is a cut product of round, oval, square or any other shape. It has a grammage between 150 and 400 g / m 2 and preferably between 180 and 300 g / m 2 . It is cotton-based and consists mainly of absorbent hydrophilic cotton fibers. More specifically, it comprises from 70 to 100 percent of cotton fibers of homogeneous quality and from 0 to 30 percent of artificial fibers such as viscose fibers, synthetic fibers such as polyester fibers, bicomponent fibers (polyester / polyester, polypropylene / polypropylene or polyester / polypropylene), or mixtures thereof.
Le tampon comprend une nappe, mono ou multicouches, formée de fibres de coton. Il peut comprendre deux couches superposées, chacune formée d'une nappe de coton. Le tampon peut encore être constitué de trois couches, une couche centrale formée d'une nappe de fibres de coton et deux couches externes constituées par exemple de voiles de carde de coton en entourant la couche centrale.The pad comprises a sheet, monolayer or multilayer, formed of fibers of cotton. It can comprise two superimposed layers, each formed of a layer of cotton. The tampon can also consist of three layers, a central layer formed of a layer of cotton fibers and two outer layers constituted by example of cotton card veils surrounding the central layer.
Suivant le mode de réalisation du tampon représenté aux figures 1 à 3B, le
tampon 1 comprend une première face externe (2, 2') et une seconde face externe
(3, 3'). La première face externe (2, 2') comprend des stries (4, 4'), (5, 5') et (6, 6') ici
disposées parallèlement les unes aux autres. L'écartement e1 entre les stries est
compris entre 1 et 8 millimètres, de préférence entre 1,2 et 5,5 millimètres et plus
préférentiellement entre 2 et 4 millimètres. La profondeur p des stries est d'au moins
0,25 millimètre, de préférence d'au moins 0,50 millimètre. Les stries forment des
creux (7, 7') et des bosses (8, 8') visibles à l'oeil nu. La seconde face externe (3, 3')
comprend également des stries 9 et 10 beaucoup plus fines et plus rapprochées les
unes des autres. L'écartement e2 entre les stries de cette seconde face est compris
entre 0,4 et 1,2 millimètre.According to the embodiment of the tampon shown in FIGS. 1 to 3B, the
La profondeur des stries est plus faible sur cette seconde face, comparée à celle de la première face. Dans certains modes de réalisation du tampon, elle est de l'ordre de 0,1 millimètre.The depth of the streaks is smaller on this second side, compared to that from the first side. In certain embodiments of the tampon, it is of the order 0.1 millimeter.
Les figures 4A, 4B, 4C et 4D illustrent d'autres modes de réalisation du tampon selon l'invention.FIGS. 4A, 4B, 4C and 4D illustrate other embodiments of the buffer according to the invention.
Les stries peuvent former en surface de la première face externe (2, 2') des lignes continues (figures 1, 4A et 4B), des lignes discontinues (figure 4C), des lignes droites (figure 1), des lignes courbes (figure 4A) ou brisées (figure 4B). Quelles que soient la disposition et la répartition des stries, ou encore leur géométrie, il est important qu'un certain nombre de creux et de bosses soient formés au niveau de la première face du tampon.The streaks may form on the surface of the first external face (2, 2 ') of the solid lines (Figures 1, 4A and 4B), broken lines (Figure 4C), lines straight (Figure 1), curved lines (Figure 4A) or broken lines (Figure 4B). Some either the arrangement and the distribution of the streaks, or their geometry, it is important that a number of hollows and bumps are formed at the level of the first side of the stamp.
Une autre caractéristique essentielle du tampon selon l'invention est sa résistance à la traction particulièrement élevée aussi bien en sens marche qu'en sens travers, en comparaison à d'autres produits connus. Du fait de cette résistance, le tampon ne se déforme pas à l'usage.Another essential characteristic of the tampon according to the invention is its particularly high tensile strength in both forward and reverse directions through, in comparison to other known products. Because of this resistance, the pad does not deform during use.
Dans le texte qui suit, la résistance à la traction correspond à la résistance à la traction mesurée sur une éprouvette et définie par la méthode de test décrite ci-après.In the following text, the tensile strength corresponds to the resistance to tension measured on a test piece and defined by the test method described below.
Des échantillons ou éprouvettes de 57 millimètres de long sur 25 millimètres de large sont découpés dans des tampons selon l'invention. Une première série d'échantillons est découpée de manière à obtenir la plus grande longueur de l'échantillon dans le sens marche afin de mesurer la résistance en sens marche. Une seconde série d'échantillons est découpée de manière à obtenir la plus grande longueur de l'échantillon dans le sens travers afin de mesurer la résistance en sens travers.Samples or test pieces 57 millimeters long by 25 millimeters large are cut from buffers according to the invention. A first series of samples is cut so as to obtain the greatest length of the sample in the running direction in order to measure the resistance in the running direction. A second series of samples is cut so as to obtain the largest sample length crosswise to measure resistance in the direction through.
La mesure de la résistance est effectuée au moyen d'un dynamomètre.The resistance is measured using a dynamometer.
On mesure la résistance à la traction (RT) des tampons selon l'invention suivant la méthode ci-après. On place l'échantillon entre deux mâchoires écartées de 30 millimètres, dans le sens de la longueur de l'échantillon. On écarte les mâchoires à une vitesse de 100 mm/min et on mesure la force maximale exercée avant rupture. Cette force maximale est la résistance à la traction.Measuring the tensile strength (RT) of the pads according to the invention according to the method below. The sample is placed between two jaws separated from 30 millimeters, along the length of the sample. We spread the jaws a speed of 100 mm / min and the maximum force exerted before breaking is measured. This maximum force is the tensile strength.
La résistance à la traction a été mesurée sur les tampons suivants :
- des tampons A selon l'invention, constitués de cent pour cent de fibres de coton ;
- des tampons B également constitués de cent pour cent de fibres de coton, fabriqués par la demanderesse à partir de nappes décrites dans le brevet européen n° 0 681 621 et commercialisés sous la marque LOTUS® ;
- des tampons C constitués de cent pour cent de fibres de coton, issus de nappes fabriquées suivant la demande de brevet européen n° 0 735 175 et commercialisés sous la marque DEMAK'UP® ;
- des tampons D constitués de cent pour cent de fibres de coton, composée d'une nappe centrale non comprimée et de deux voiles de carde calandrés et marqués entourant la couche centrale .
- des tampons E comportant une nappe constituée d'une superposition de voiles de carde sur laquelle est déposé un nontissé hydrolié de fibres de viscose et de polyester, avant découpe ; et
- des tampons F constitués de 15 % de fibres thermofusibles et de 85 % de fibres de coton, ne présentant pas de couches différentes, ni de motif de surface.
- tampons A according to the invention, made of one hundred percent cotton fibers;
- pads B also made up of one hundred percent cotton fibers, manufactured by the applicant from tablecloths described in European patent No. 0 681 621 and marketed under the brand LOTUS®;
- tampons C made up of one hundred percent cotton fibers, produced from tablecloths produced according to European patent application No. 0 735 175 and marketed under the brand DEMAK'UP®;
- D pads made of one hundred percent cotton fibers, consisting of an uncompressed central ply and two calendered and marked card webs surrounding the central ply.
- pads E comprising a sheet consisting of a superposition of card webs on which is deposited a hydrolied nonwoven of viscose and polyester fibers, before cutting; and
- pads F consisting of 15% of hot-melt fibers and 85% of cotton fibers, having no different layers or surface pattern.
Les tampons B, C, D, E et F illustrent l'état de la technique.Buffers B, C, D, E and F illustrate the state of the art.
Les résultats correspondants aux moyennes des mesures sont rapportés dans le
Tableau ci-dessous.
Les résistances à la traction en sens marche et en sens travers sont très nettement supérieures pour les tampons A selon l'invention par rapport à celles des tampons B, C, D, E et F. Cette résistance se traduit à l'usage par une absence de déformation du tampon.The tensile strengths in running and cross direction are very significantly higher for buffers A according to the invention compared to those of buffers B, C, D, E and F. This resistance results in use by an absence of deformation of the tampon.
Les tampons selon l'invention ont une résistance à la traction en sens marche d'au moins 20 Newtons et une résistance à la traction en sens travers d'au moins 15 Newtons.The pads according to the invention have a tensile strength in the running direction at least 20 Newtons and a transverse tensile strength of at least 15 Newtons.
On note également que pour les tampons A selon l'invention, la résistance à la traction en sens travers se rapproche de la résistance à la traction en sens marche. Le produit selon l'invention est homogène et présente avantageusement une certaine symétrie quant à la résistance à la traction et à la déformation en sens marche par rapport au sens travers. Le produit est qualifié de "carré".It is also noted that for the buffers A according to the invention, the resistance to pull in the cross direction approaches the tensile strength in the run direction. The product according to the invention is homogeneous and advantageously has a certain symmetry with respect to tensile strength and deformation in the forward direction by relation to the cross direction. The product is called "square".
L'allongement sous une force constante de 5 Newtons a également été mesuré en utilisant le même matériel que celui du test de résistance à la traction.The elongation under a constant force of 5 Newtons was also measured using the same material as that of the tensile strength test.
Les résultats (en pourcentage) sont rapportés dans le Tableau ci-dessous et
correspondent à un allongement mesuré en sens marche.
Plus l'allongement est faible, moins le tampon aura tendance à se déformer à l'usage.The lower the elongation, the less the buffer will tend to deform at use.
On observe que pour les tampons constitués de cent pour cent de fibres de coton, les tampons selon l'invention présentent le plus faible allongement.It is observed that for the pads made up of one hundred percent fiber cotton, the pads according to the invention have the lowest elongation.
Encore une autre caractéristique essentielle du tampon est le pourcentage de fibres liées comparativement à des tampons de coton hydrophile connus.Yet another essential characteristic of the tampon is the percentage of bonded fibers compared to known cotton wool pads.
Dans les tampons selon l'invention, au moins 50 % des fibres sont liées, de préférence 60 %.In the pads according to the invention, at least 50% of the fibers are bound, preferably 60%.
Afin d'illustrer la quantité de fibres liées, on a mesuré la masse des fibres liées en surface du tampon en suivant la méthode ci-après.In order to illustrate the quantity of bonded fibers, the mass of bonded fibers was measured on the surface of the tampon by following the method below.
On utilise des tampons en forme de disque d'environ 57 millimètres de diamètre. On sépare soigneusement la partie du disque correspondant aux fibres liées en retirant à la main toutes les fibres non liées qui s'enlèvent sans résistance. Puis on pèse la partie restante du disque. La masse mesurée correspond à la quantité de fibres liées.We use disc-shaped pads of approximately 57 millimeters diameter. We carefully separate the part of the disc corresponding to the bonded fibers removing by hand all unbound fibers which can be removed without resistance. Then we weighs the remaining part of the disc. The mass measured corresponds to the quantity of fibers linked.
Des mesures ont été effectuées à partir d'échantillons de tampons A, B, C, D et E.Measurements were made from samples of buffers A, B, C, D summer.
Les résultats sont rapportés dans le tableau ci-dessous.
La quantité de fibres liées dans le tampon selon l'invention est multipliée par deux, voire par trois par rapport à la quantité de fibres liées dans les tampons de l'art antérieur. Pour la première face, les fibres situées en surface ont au moins un point de fixation dans l'épaisseur du tampon. Ceci permet de structurer la première face du tampon et lui donner un relief permanent.The quantity of fibers bound in the buffer according to the invention is multiplied by two or even three compared to the amount of fiber bound in art pads prior. For the first face, the fibers located on the surface have at least one point of fixing in the thickness of the buffer. This allows to structure the first side of the stamp and give it a permanent relief.
Ce résultat est surprenant et apporte d'excellentes propriétés de cohésion à la nappe.This result is surprising and provides excellent cohesion properties to the tablecloth.
La cohésion du tampon selon l'invention est nettement améliorée par rapport aux produits de l'art antérieur.The cohesion of the tampon according to the invention is significantly improved compared to to prior art products.
Afin d'illustrer cette cohésion, on a mesuré la résistance à la délamination des tampons A selon l'invention ainsi que celle des tampons B, C, D et E correspondant à l'état de la technique. Tous ces tampons sont sous la forme de disque d'environ 57 millimètres de diamètre. In order to illustrate this cohesion, the delamination resistance of the buffers A according to the invention as well as that of buffers B, C, D and E corresponding to the state of the art. All of these pads are in the form of a disc of about 57 millimeters in diameter.
La méthode de mesure de la résistance à la délamination consiste à :
- utiliser le même matériel que celui utilisé pour la mesure de la résistance à la traction, en remplaçant les mâchoires par des plateaux,
- placer un adhésif double-faces sur chacun des plateaux,
- déposer sur le plateau du bas, le disque de coton directement sur l'adhésif,
- presser les deux plateaux l'un contre l'autre,
- écarter les deux plateaux à une vitesse de 100 mm/min jusqu'à un écartement de 30 millimètres, et
- mesurer la force maximum exercée pour délaminer le disque.
- use the same equipment as that used for the measurement of the tensile strength, replacing the jaws with trays,
- place a double-sided adhesive on each of the trays,
- place the cotton pad directly on the adhesive on the bottom tray,
- press the two plates against each other,
- move the two plates apart at a speed of 100 mm / min up to a spacing of 30 millimeters, and
- measure the maximum force exerted to delaminate the disc.
Les résultats sont rapportés dans le Tableau ci-dessous.
On constate une nette amélioration de la résistance à la délamination pour les tampons selon l'invention constitués de cent pour cent de fibres de coton par rapport à la résistance à la délamination des tampons B, C, D et E de l'état de la technique, constitués de cent pour cent de fibres de coton. Les tampons A selon l'invention, ici constitués de cent pour cent de fibres de coton, présentent une résistance à la délamination similaire à celle d'un produit (tampon F) constitué de 15 % de fibres thermofusibles et de 85 % de fibres de coton.There is a marked improvement in the resistance to delamination for tampons according to the invention made of one hundred percent cotton fibers relative to the resistance to delamination of buffers B, C, D and E of the state of the art, made from one hundred percent cotton fibers. Buffers A according to the invention, here made of one hundred percent cotton fibers, have resistance to delamination similar to that of a product (buffer F) made of 15% fiber hot-melt and 85% cotton fiber.
Dans le cas du tampon E, l'association entre la nappe de voiles de carde et le voile hydrolié et particulièrement faible.In the case of buffer E, the association between the web of carded sails and the particularly weak and hydrated veil.
La première face du tampon selon l'invention peluche beaucoup moins que certains produits connus.The first side of the tampon according to the invention lint much less than some known products.
On a mesuré la résistance au peluchage de la première face des tampons A et des tampons B, C, D, E et F de l'état de la technique en suivant une méthode spécifique décrite ci-dessous. Les tampons ont la forme de disque et ont un diamètre d'environ 57 millimètres.The lint resistance of the first side of pads A was measured and state of the art buffers B, C, D, E and F using a method specific described below. The pads are disc-shaped and have a diameter about 57 millimeters.
La méthode consiste à utiliser un doigt en caoutchouc monté sur un cylindre afin de simuler le frottement sur la peau. Ce doigt est mis en mouvement afin de venir se poser à la surface d'un tampon et se déplacer sur sa surface. On place le tampon sous forme de rondelle sur une plaque dont la surface comporte un revêtement en TEFLON. Puis on fixe ce tampon en plaçant une autre plaque au-dessus, cette dernière ayant une découpe en forme de U pour laisser passer le doigt, la découpe faisant apparaítre une partie du tampon. On règle le nombre de passage du doigt, la vitesse, la charge appliquée sur le doigt au moyen d'un contrepoids.The method is to use a rubber finger mounted on a cylinder to simulate friction on the skin. This finger is set in motion in order to come land on the surface of a tampon and move on its surface. We place the tampon in the form of a washer on a plate whose surface has a coating of Teflon. Then we fix this pad by placing another plate on top, this last one having a U-shaped cutout to let the finger pass, the cutout showing a part of the buffer. We set the number of finger passes, the speed, the load applied to the finger by means of a counterweight.
Au cours du test, le doigt vient se poser et se déplacer sur la surface du tampon cinq fois successives. Des fibres se détachent de la surface du tampon et viennent se plaquer sur le doigt en caoutchouc. Après les cinq passages, on récupère les fibres retenues par le doigt au moyen d'une pince à épiler et on place ces fibres sur un verre de montre. On répète la procédure pour cinq tampons de chacun des types A, B, C, D, E et F. On pèse les fibres récoltées sur cinq tampons sur une balance sensible au dixième de milligramme. Chaque type de tampon A, B, C, D, E et F a été testé.During the test, the finger comes to rest and move on the surface of the tampon five successive times. Fibers detach from the pad surface and come press on the rubber finger. After the five passes, we recover the fibers retained by the finger using tweezers and these fibers are placed on a glass of watch. The procedure is repeated for five buffers of each of the types A, B, C, D, E and F. The harvested fibers are weighed on five pads on a balance sensitive to tenth of a milligram. Each type of buffer A, B, C, D, E and F has been tested.
Pour les tampons A, la première face externe A1 a été testée ainsi que la seconde face externe A2.For buffers A, the first external face A1 has been tested as well as the second external face A2.
Pour les tampons E, la face correspondant au voile hydrolié E1 a été testée ainsi que l'autre face E2.For E buffers, the face corresponding to the E1 hydrofoil has been tested as well than the other side E2.
Les moyennes des masses sont rapportées dans le Tableau ci-dessous.
La masse de fibres est divisée par 10 pour la première face des tampons selon l'invention, par rapport à la masse mesurée pour les tampons B, C, D et F. Le tampon E présente une face peu pelucheuse due à la présence du nontissé mais une autre face excessivement pelucheuse comparativement à la seconde face du tampon selon l'invention. La diminution du peluchage est donc très importante pour le tampon selon l'invention. La masse des tampons de coton en forme de disque couramment utilisés varie entre 0,5 et 0,7 gramme. Les fibres récupérées à partir de la première face (A1) des cinq tampons A selon l'invention correspondent donc à 0,1 % de la masse du tampon A. Pour comparaison, les fibres récupérées à partir des cinq tampons de chacun des types B, C, D et F de l'état de la technique s'élèvent à 1 % de la masse des tampons correspondants.The mass of fibers is divided by 10 for the first face of the pads according to the invention, with respect to the mass measured for the buffers B, C, D and F. The buffer E has a lint-free side due to the presence of the nonwoven, but another side excessively fluffy compared to the second side of the pad according to the invention. The reduction in linting is therefore very significant for the tampon according to the invention. The mass of commonly used disc-shaped cotton pads varies between 0.5 and 0.7 grams. The fibers recovered from the first face (A1) of the five buffers A according to the invention therefore correspond to 0.1% of the mass of the buffer A. For comparison, the fibers recovered from the five each of types B, C, D and F of the state of the art amount to 1% of the mass of corresponding buffers.
Ce résultat est inattendu et très avantageux.This result is unexpected and very advantageous.
La première face du tampon a donc une structure nouvelle, procurant des propriétés avantageuses.The first side of the tampon therefore has a new structure, providing advantageous properties.
De fait, le tampon selon l'invention présente de nombreux avantages à l'usage.In fact, the tampon according to the invention has numerous advantages in use.
La première face est utilisée pour appliquer des produits de soin sur la peau.The first side is used to apply skincare products to the skin.
Dans le cas du nettoyage ou démaquillage de la peau, on applique le produit cosmétique sur la première face du tampon puis on passe cette première face sur la peau ou sur le visage.In the case of cleaning or removing make-up from the skin, the product is applied cosmetic on the first side of the pad then we pass this first side on the skin or face.
Un seul passage du tampon suffit, il n'est plus nécessaire de frotter. Ceci évite les irritations de la peau.A single pass of the tampon is enough, it is no longer necessary to rub. This avoids skin irritations.
En effet, la structure de la première face comportant des stries forme avantageusement un relief en creux et en bosse. La surface au contact de la peau est plus limitée du fait du relief. Indeed, the structure of the first face comprising ridges advantageously forms a relief in relief and in bump. The surface in contact with the skin is more limited due to the relief.
La partie proéminente en bosse augmente les pressions sur la peau et les forces de friction. L'effet de friction ainsi obtenu améliore le nettoyage. Les parties en creux forment une réserve supplémentaire de produit disponible.The prominent bump part increases the pressures on the skin and the forces friction. The friction effect thus obtained improves cleaning. The hollow parts form an additional reserve of available product.
Lors du passage du tampon sur la peau, un même creux remplit d'abord pour fonction celle de réservoir de produit qui vient s'étaler au contact du tampon sur la peau, sous la pression d'application, puis ensuite celle de collecteur d'impuretés au cours du déplacement du tampon sur la peau. Le nettoyage se faisant par le premier passage est ainsi optimisé.When the tampon passes over the skin, the same hollow first fills for function that of the product reservoir which comes to spread in contact with the pad on the skin, under the application pressure, then that of an impurity collector at during the displacement of the tampon on the skin. Cleaning done by the first passage is thus optimized.
Si les stries sont disposées en lignes parallèles, le déplacement du tampon sur la peau se fait préférentiellement perpendiculairement aux stries de la première face.If the streaks are arranged in parallel lines, the displacement of the tampon on the skin is preferentially made perpendicular to the striations of the first face.
La seconde face est utilisée pour absorber les impuretés, l'excédent de produit et les traces de maquillage qui restent sur la peau.The second side is used to absorb impurities, excess product and traces of makeup that remain on the skin.
A l'usage, le produit ne se déforme pas, il a une excellente tenue en main.In use, the product does not deform, it has an excellent grip.
Dans un exemple particulier d'utilisation qui est celui du retrait du vernis à ongle, le dissolvant qui classiquement pénètre dans le tampon, est moins absorbé en profondeur et est plus facilement restitué lors du nettoyage, grâce à la structure plus compacte de la première face du tampon et aux fibres resserrées dans l'épaisseur du tampon. Le dissolvant est ainsi utilisé plus efficacement pour dissoudre le vernis recouvrant les ongles.In a particular example of use which is that of removing the varnish nail, the solvent that conventionally penetrates the tampon, is less absorbed in depth and is more easily restored during cleaning, thanks to the more compact on the first side of the pad and with fibers tightened in the thickness of the buffer. The solvent is thus used more effectively to dissolve the varnish covering the nails.
Un autre effet a été relevé par les personnes testant le tampon selon l'invention.Another effect has been noted by people testing the tampon according to the invention.
Le relief de la première face au contact de la peau a un effet massant lors du passage du tampon et procure un effet relaxant pour la peau.The relief of the first face in contact with the skin has a massaging effect during passage of the tampon and provides a relaxing effect for the skin.
Afin d'améliorer l'utilisation de produits de soin aqueux pour la peau, tels que des produits de toilette, des produits de maquillage ou de démaquillage, la première face externe peut comprendre un agent retardant l'absorption de ces produits permettant de garder temporairement les produits appliqués en surface du tampon sans qu'ils ne pénètrent à l'intérieur du tampon.To improve the use of aqueous skin care products, such as toiletries, make-up or make-up removal products, the first external face may include an agent delaying the absorption of these products allowing to temporarily keep the products applied on the surface of the tampon without them getting inside the tampon.
La combinaison de la structure de la première face décrite précédemment avec cette nouvelle propriété retardant l'absorption des produits aqueux, fournit un produit très performant à l'usage.The combination of the structure of the first face described above with this new property delaying the absorption of aqueous products, provides a product very efficient in use.
L'agent retardant l'absorption est un composant à base d'adoucissants ou de cires ou encore un composant se fixant sur les fibres.The absorption delaying agent is a component based on softeners or waxes or a component that attaches to the fibers.
Appliqués en faibles quantités sur des produits de coton classiquement hydrophiles et absorbants, on a pu observer de manière surprenante que ces composants permettaient de retarder l'absorption des produits aqueux en surface des produits de coton.Applied in small quantities on cotton products conventionally hydrophilic and absorbent, it has been surprisingly observed that these components made it possible to delay the absorption of aqueous products on the surface of cotton products.
Des exemples d'adoucissants sont des amines grasses, des alcools gras, des esters gras, des polyéthylènes ou polyamides grasses ou leurs mélanges. Examples of softeners are fatty amines, fatty alcohols, fatty esters, fatty polyethylenes or polyamides or their mixtures.
Les composants se fixant sur les fibres sont par exemple des sels métalliques complexes d'acide stéarique, des dérivés perfluorés, des sels de zirconium ou encore des silicones.The components which attach to the fibers are, for example, metal salts stearic acid complexes, perfluorinated derivatives, zirconium salts or silicones.
Les composants à base de cires sont des émulsions de cires et de paraffines ou des émulsions de cires seules.The wax-based components are emulsions of waxes and paraffins or wax emulsions alone.
De préférence, l'agent est une émulsion de cire naturelle, d'origine minérale, végétale ou animale.Preferably, the agent is a natural wax emulsion, of mineral origin, vegetable or animal.
Des exemples de cire d'origine animale sont la cire de spermaceti et la cire d'abeille.Examples of animal wax are spermaceti wax and wax bee.
Des exemples de cire d'origine végétale sont la cire de candellila et la cire de carnauba.Examples of plant-based wax are candellila wax and carnauba.
Des exemples de cire d'origine minérale sont la cérésine et l'azocérite.Examples of wax of mineral origin are ceresin and azocerite.
L'émulsion de cire d'abeille est particulièrement avantageuse et appropriée pour l'usage cosmétique du tampon. C'est un composant testé dermatologiquement. Il s'agit d'une émulsion cationique de cire d'abeille blanchie qui comprend de la cire d'abeille, de l'eau, des agents émulsifiants, glycéryl stéarate et diéthanolaminoéther stéarate.The beeswax emulsion is particularly advantageous and suitable for cosmetic use of the tampon. It is a dermatologically tested component. It's about a cationic bleached beeswax emulsion which comprises beeswax, water, emulsifying agents, glyceryl stearate and diethanolaminoether stearate.
La cire d'abeille elle-même est composée d'esters d'acides gras cireux tels que du myricyl palmitate, d'acide cérotique et d'autres acides cireux homologues et de petites quantités d'hydrocarbones, d'esters de cholestérol et d'alcools céryliques.The beeswax itself is composed of esters of waxy fatty acids such as myricyl palmitate, cerotic acid and other homologous waxy acids and small amounts of hydrocarbons, cholesterol esters and ceryl alcohols.
L'agent retardant l'absorption est une émulsion ou dispersion comprenant au moins 30 % de matières actives.The agent delaying absorption is an emulsion or dispersion comprising at least minus 30% of active ingredients.
La première face du produit ou tampon de coton selon l'invention comprend au moins 1 g/m2 d'émulsion appliquée, c'est-à-dire au moins 0,3 g/m2 de matières actives déposées.The first face of the cotton product or pad according to the invention comprises at least 1 g / m 2 of applied emulsion, that is to say at least 0.3 g / m 2 of active ingredients deposited.
La première face comprenant en surface un tel agent acquiert des propriétés très avantageuses.The first face comprising on the surface such an agent acquires very advantageous.
Elle retarde la pénétration des produits aqueux appliqués en surface des tampons.It delays the penetration of aqueous products applied to the surface of buffers.
La pénétration des produits de soin tels que laits de toilette, produits démaquillants ou de démaquillage est un inconvénient majeur des tampons en coton hydrophile classiques. Les produits de soin ou produits cosmétiques sont gaspillés et ne sont pas utilisés de manière économique, ils traversent parfois le tampon. L'efficacité du nettoyage de la peau n'est pas optimisée.The penetration of care products such as toilet milks, products make-up remover or make-up remover is a major drawback of cotton pads classic hydrophilic. Skincare or cosmetic products are wasted and are not used economically, they sometimes pass through the tampon. The effectiveness of skin cleaning is not optimized.
Avec un tel traitement de la première face du tampon, une "imperméabilité" temporaire à l'eau est créée, ceci permet d'éviter l'absorption quasi spontanée des produits aqueux par les fibres de coton hydrophile dès leur dépôt sur le tampon.With such treatment of the first face of the tampon, "impermeability" temporary water is created, this avoids the almost spontaneous absorption of aqueous products by hydrophilic cotton fibers as soon as they are deposited on the tampon.
Un test simple mettant en évidence cette propriété consiste à déposer en surface d'un récipient rempli d'eau, à température ambiante (environ 20°), des tampons ainsi traités selon l'invention, la face traitée étant tournée vers l'extérieur et la face absorbante vers l'eau, et des tampons B et C de l'état de la technique. Les premiers restent en surface pendant au moins 5 minutes, les autres s'imprègnent quasiment instantanément d'eau et sont très rapidement immergés, en général au bout de 3 à 5 secondes.A simple test highlighting this property consists in depositing on the surface a container filled with water, at room temperature (around 20 °), tampons as well treated according to the invention, the treated side facing outwards and the face absorbent towards water, and prior art buffers B and C. The first ones remain on the surface for at least 5 minutes, the others almost soak up water instantly and are very quickly submerged, usually after 3 to 5 seconds.
L'avantage ainsi procuré est de pouvoir garder les produits en surface plus longtemps et d'utiliser la quantité totale de produit déposé sur le tampon pour les soins de la peau, sans perte de produit et sans déformation du tampon.The advantage thus obtained is to be able to keep the products on the surface more for a long time and use the total amount of product deposited on the tampon to skin care, without loss of product and without deformation of the tampon.
Un test d'usage interne à la société demanderesse a été réalisé par 25 personnes utilisant habituellement et exclusivement des tampons C de coton hydrophile pour les soins de la peau, le démaquillage, etc...A test of internal use at the requesting company was carried out by 25 people usually and exclusively using cotton wool pads C for skin care, make-up removal, etc ...
Des tampons A selon l'invention, dont la première face a été traitée par un agent retardant l'absorption, ont été testés comparativement à des tampons selon l'invention dont la première face n'a pas été traitée et aux tampons C de l'état de la technique.A pads according to the invention, the first side of which has been treated with an agent delaying absorption, have been tested compared to tampons according to the invention the first side of which has not been treated and with C buffers of the state of the art.
Les observations suivantes ont été relevées.The following observations were noted.
Pour les tampons selon l'invention dont la première face n'a pas été traitée, 50 % des personnes ont noté un retard de l'absorption des produits de soin déposés en surface de ces tampons. Ceci s'explique par la structure spécifique de la première face des tampons selon l'invention. En effet, les fibres sont plus resserrées dans l'épaisseur du tampon.For the pads according to the invention, the first side of which has not been treated, 50% of people noted a delay in the absorption of the care products deposited in surface of these pads. This is explained by the specific structure of the first face pads according to the invention. In fact, the fibers are more tight in thickness buffer.
Quant aux tampons selon l'invention dont la première face a été traitée, presque la totalité des personnes : 92 %, a noté cette capacité du tampon à retarder l'absorption des produits de soin.As for the pads according to the invention, the first face of which has been treated, almost all people: 92%, noted this capacity of the buffer to delay absorption of skincare products.
50 % des personnes ont également trouvé une amélioration du nettoyage de la peau en utilisant les tampons selon l'invention dont la première face n'a pas été traitée. Avec les tampons selon l'invention dont la première face a été traitée, le nombre de personnes ayant trouvé une amélioration du nettoyage, s'élève à 92 %.50% of people also found improved cleaning of the skin using the pads according to the invention, the first side of which has not been treated. With the pads according to the invention, the first side of which has been treated, the number of people who found an improvement in cleaning, amounted to 92%.
Enfin, pour le démaquillage, 50 % des personnes ont observé une meilleure efficacité du démaquillage avec des tampons selon l'invention sans traitement de la première face. 85 % des personnes ont fait cette observation pour les tampons selon l'invention avec traitement de la première face.Finally, for makeup removal, 50% of people observed better effectiveness of removing makeup with pads according to the invention without treatment of the first side. 85% of people made this observation for tampons according to the invention with treatment of the first face.
Des avantages similaires ont pu être observés lors de l'utilisation de produits de maquillage, tels que des lotions, de crèmes, des fonds de teint, des fards à joue, pour appliquer et répartir le produit sur la peau.Similar benefits have been seen when using makeup, such as lotions, creams, foundations, blushes, for apply and distribute the product on the skin.
Les personnes ont également utilisé avantageusement le produit selon l'invention, pour appliquer des produits de parfumerie tels que des eaux de toilette. L'absorption immédiate de l'eau de toilette par le tampon est évitée comparativement à l'application d'eau de toilette avec des produits de coton de l'art antérieur.People have also used the product to advantage the invention, for applying perfumery products such as toilet waters. Immediate absorption of toilet water by the tampon is comparatively avoided the application of toilet water with cotton products of the prior art.
Deux techniques de fabrication sont possibles pour obtenir le tampon selon l'invention. Two manufacturing techniques are possible to obtain the tampon according to the invention.
Une première technique consiste à différencier les deux faces du tampon en
hydroliant chacune des faces suivant des paramètres différents.
Un premier procédé consiste à fabriquer par nappage au moins deux nappes de fibres
de coton formant les deux couches extérieures. Ces nappes peuvent être de qualité
fibreuse identique ou différente. Elles peuvent être constituées directement à partir de
coton hydrophile et blanchi. Elles peuvent aussi être obtenues à partir de coton brut
écru, puis traitées chimiquement afin d'obtenir l'hydrophilie et le blanchiment. Elles
sont ensuite superposées et associées par tout moyen connu tel que des moyens de
collage ou des moyens mécaniques comme le calandrage ou l'aiguilletage. Les
moyens d'association peuvent encore être hydrauliques.A first technique consists in differentiating the two faces of the tampon by hydrolizing each of the faces according to different parameters.
A first method consists in manufacturing by layering at least two layers of cotton fibers forming the two outer layers. These sheets may be of the same or different fiber quality. They can be made directly from hydrophilic and bleached cotton. They can also be obtained from unbleached raw cotton, then chemically treated to obtain hydrophilicity and bleaching. They are then superimposed and associated by any known means such as bonding means or mechanical means such as calendering or needling. The means of association can also be hydraulic.
On peut obtenir une bonne association par imprégnation des nappes superposées par tout moyen classique connu tel que le passage dans un bain d'imprégnation, la pulvérisation, le déversement d'une solution. Cette imprégnation est associée à un exprimage compactant la nappe et éliminant une partie de la quantité de liquide contenu dans la nappe humide par exemple par calandrage ou passage sur une fente à vide.A good association can be obtained by impregnating the layers superimposed by any known conventional means such as passing through a bath impregnation, spraying, spilling a solution. This impregnation is associated with an expression compacting the water table and eliminating part of the quantity liquid contained in the wet sheet, for example by calendering or passing over a vacuum slot.
Un second procédé consiste à préparer une nappe de fibres de coton par voie pneumatique et à disposer cette nappe entre deux voiles de carde de coton. Un procédé de fabrication et d'association de nappes en continu, est décrit par le brevet européen n° 0 681 621 au nom de la demanderesse.A second method consists in preparing a layer of cotton fibers by pneumatic and to lay this tablecloth between two cotton card sails. A continuous method of manufacturing and associating plies, is described by the patent European No. 0 681 621 in the name of the plaintiff.
Dans ce dernier cas, l'imprégnation de la nappe entourée des deux voiles de carde, effectuée au cours des différents traitements chimiques, contribue à l'association des couches entre elles.In the latter case, the impregnation of the sheet surrounded by the two veils of carding, carried out during the various chemical treatments, contributes to the association of the layers together.
La technique d'hydroliage permet à la fois d'associer les couches ou les deux nappes entre elles, et de lier les surfaces de la nappe. On sélectionne des paramètres spécifiques d'hydroliage pour la première face externe et on utilise des paramètres d'hydroliage plus classiques pour l'autre face. Ceci permet au moyen d'une seule technique de remplir trois fonctions différentes : association des couches ou nappes, liage des fibres et différenciation des deux faces externes. L'hydroliage est effectué au moyen de jets d'eau à haute pression combinés à un exprimage par le vide, au moyen d'un dispositif commercialisé par la société ICBT-PERFOJET, Grenoble, France.The hydroliage technique makes it possible to combine the layers or both tablecloths together, and to bind the surfaces of the tablecloth. We select parameters hydroliage specific for the first external face and we use parameters more conventional hydrobonding for the other side. This allows by means of a single technique of fulfilling three different functions: association of layers or layers, fiber bonding and differentiation of the two external faces. The hydroliage is carried out at by means of high pressure water jets combined with vacuum expression, by means of of a device marketed by ICBT-PERFOJET, Grenoble, France.
Les deux étapes d'hydroliage, correspondant au traitement de chacune des deux faces externes du produit, peuvent intervenir, dans le cas d'une fibre écrue qui va être traitée chimiquement, juste après l'étape d'imprégnation de la nappe comme cela est décrit dans la demande de brevet européen n° 0 735 175. Elles peuvent aussi être placées en phase finale de rinçage suivant le brevet européen n° 0 805 888 au nom de la demanderesse. L'avantage ici quel que soit le procédé, est de différencier les faces par l'hydroliage, directement en ligne. The two hydroliage stages, corresponding to the treatment of each of the two external faces of the product, can intervene, in the case of an unbleached fiber which is going to be chemically treated, just after the impregnation step of the web as is described in European patent application No. 0 735 175. They can also be placed in the final rinsing phase according to European Patent No. 0 805 888 in the name of the plaintiff. The advantage here, whatever the process, is to differentiate the faces by hydroliage, directly online.
Les deux faces externes sont hydroliées suivant des paramètres différents l'une après l'autre sur des toiles sans fin ou des cylindres.The two external faces are hydroleumed according to different parameters one after another on endless canvases or cylinders.
Les jets d'eau à haute pression utilisés pour entrelacer les fibres des faces externes, marquent la surface de ces faces de stries visibles à l'oeil nu, dont l'écartement correspond à la distance entre les axes des jets. Plus précisément, le dispositif d'hydroliage comprend une pompe à haute pression alimentant un injecteur placé transversalement au défilement de la nappe ou couche de fibres, sur toute sa largeur. L'injecteur consiste en un volume d'eau sous pression, fermé par une lame d'acier qui est perforée de trous calibrés produisant des jets sous la forme de fines aiguilles d'eau à haute pression projetées perpendiculairement à la surface de la face externe. Ces fins jets entremêlent les fibres et entraínent les fibres libres de la surface dans l'épaisseur du produit.The high pressure water jets used to intertwine the fibers of the faces external, mark the surface of these faces with streaks visible to the naked eye, including the spacing corresponds to the distance between the axes of the jets. More specifically, the hydroliaging device includes a high pressure pump supplying an injector placed transversely to the running of the sheet or layer of fibers, over its entire width. The injector consists of a volume of pressurized water, closed by a blade of steel which is perforated with calibrated holes producing jets in the form of fines high pressure water needles projected perpendicular to the surface of the face external. These fine jets entangle the fibers and entrain the free fibers of the surface in the thickness of the product.
En modifiant la distance entre les axes des trous et le diamètre des trous et en sélectionnant un apport en énergie spécifique pour un dispositif d'hydroliage utilisé pour le traitement d'une face externe par rapport à l'autre dispositif utilisé pour le traitement de l'autre face, on différencie les deux faces externes du produit.By modifying the distance between the axes of the holes and the diameter of the holes and by selecting a specific energy supply for a hydroliage device used for the treatment of an external face compared to the other device used for the treatment of the other side, we differentiate the two external sides of the product.
Pour la première face externe, on peut par exemple utiliser un dispositif d'hydroliage dont la lame est perforée avec une distance importante entre les trous : de 1 à 5,5 millimètres, de préférence entre 2 et 4 mm. Les trous perforés dans la lame (communément dénommée "strip") ont un diamètre allant de 130 à 200 µm et de préférence de 140 à 170 µm et sont régulièrement espacés. Si la position de l'injecteur est fixe et les couches de coton défilant sous ce dernier, on observe sur la surface du produit, une série de stries ou sillons parallèles correspondant au passage sous les jets. La pression exercée est élevée, d'au moins 40 bars, de préférence entre 50 et 80 bars de manière à creuser en profondeur des stries ou sillons dans le produit. Ces stries résultent de la compression, de l'entraínement et de la fixation des fibres dans l'épaisseur de la nappe. Pour la réalisation des stries, l'apport en énergie est d'au moins 1,4 x 10-3 kwh/m2 et peut varier entre 1,4 x 10-3 et 2,5 x 10-3 kwh/m2 selon la vitesse, la pression, le diamètre des trous et l'écartement entre les trous.For the first external face, it is possible, for example, to use a hydroliage device whose blade is perforated with a large distance between the holes: from 1 to 5.5 millimeters, preferably between 2 and 4 mm. The perforated holes in the blade (commonly called "strip") have a diameter ranging from 130 to 200 μm and preferably from 140 to 170 μm and are regularly spaced. If the position of the injector is fixed and the layers of cotton running under it, there is a series of parallel streaks or grooves on the surface of the product corresponding to the passage under the jets. The pressure exerted is high, at least 40 bars, preferably between 50 and 80 bars so as to dig deep streaks or grooves in the product. These streaks result from the compression, training and fixing of the fibers in the thickness of the sheet. For the production of streaks, the energy input is at least 1.4 x 10 -3 kwh / m 2 and can vary between 1.4 x 10 -3 and 2.5 x 10 -3 kwh / m 2 depending on speed, pressure, hole diameter and spacing between holes.
En modifiant la position de l'injecteur ou en déplaçant ou faisant vibrer la lame, on peut obtenir des géométries de stries, différentes (figure 4A par exemple). Il est aussi possible de placer des masques sous la lame obturant certains trous suivant une géométrie spécifique afin d'obtenir une répartition des stries telle que celle représentée à la figure 4C.By changing the position of the injector or by moving or vibrating the blade, one can obtain different stripe geometries (FIG. 4A for example). It is also possible to place masks under the blade closing certain holes following a specific geometry in order to obtain a distribution of streaks such as that shown in Figure 4C.
La première face ainsi hydroliée présente un aspect compacté, très "structuré", des reliefs en creux et en bosse. L'état de surface ainsi obtenu, ne peluche pas du tout.The first side thus hydroliated has a compact, very "structured" appearance, reliefs in hollow and hump. The surface finish thus obtained does not fluff at all.
On utilise pour la seconde face externe un dispositif d'hydroliage utilisant des paramètres classiques, avec une lame perforée de trous espacés d'une distance comprise entre 0,4 et 1,2 mm et de préférence entre 0,4 et 0,9 mm. Le diamètre des trous peut aller de 100 à 130 µm.For the second external face, a hydroliage device using classic parameters, with a blade perforated with holes spaced by a distance between 0.4 and 1.2 mm and preferably between 0.4 and 0.9 mm. The diameter of holes can range from 100 to 130 µm.
Les pressions exercées pour des vitesses similaires à celles utilisées pour le traitement de la première face, sont modérées : de 20 à 40 bars. Ceci correspond à un apport en énergie située entre 0,9 x 10-3 et 1,6 x 10-3 kwh/m2.The pressures exerted for speeds similar to those used for the treatment of the first face, are moderate: from 20 to 40 bars. This corresponds to an energy supply between 0.9 x 10 -3 and 1.6 x 10 -3 kwh / m 2 .
Les stries obtenues en surface de la seconde face sont beaucoup plus fines et peu profondes. La seconde face externe présente un aspect moins compacté, une surface douce et absorbante. Elle ne présente pas de reliefs visibles à l'oeil nu, en creux et en bosse.The streaks obtained on the surface of the second face are much finer and shallow. The second external face has a less compact appearance, a soft and absorbent surface. It does not present reliefs visible to the naked eye, in hollow and bump.
Les deux faces ainsi obtenues ont des aspects fondamentalement différents.The two faces thus obtained have fundamentally different aspects.
Une différenciation supplémentaire peut être apportée en imprimant par marquage des motifs différents des stries existantes sur la première face.Additional differentiation can be made by printing by marking of the different patterns of the existing streaks on the first face.
Une seconde technique de fabrication du tampon selon l'invention consiste à différencier les deux faces du tampon par marquage.A second technique for manufacturing the tampon according to the invention consists in differentiate the two sides of the stamp by marking.
Deux nappes sont préparées à partir de fibres blanchies mises en nappe ou de nappes blanchies. Elles sont ensuite chacune marquées en passant entre un cylindre gravé comportant un motif en relief et une contrepartie lisse afin d'imprimer ce motif dans l'épaisseur de la nappe et former un relief en creux et en bosse plus ou moins profond à la surface des nappes qui correspondront aux faces externes du tampon. Les pressions de marquage exercées par les cylindres sont suffisantes pour obtenir les résistances escomptées pour le tampon, c'est-à-dire une résistance d'au moins 20 N en sens marche et d'au moins 16 N en sens travers, telle que mesurée par la méthode de test décrite précédemment.Two tablecloths are prepared from bleached fibers laid in tablecloth or bleached tablecloths. They are then each marked passing between a cylinder engraved with a relief motif and a smooth counterpart to print this motif in the thickness of the tablecloth and form a hollow and more or less relief in relief deep on the surface of the sheets which will correspond to the external faces of the pad. The marking pressures exerted by the cylinders are sufficient to obtain the expected resistances for the buffer, i.e. a resistance of at least 20 N in direction of travel and at least 16 N in cross direction, as measured by the test described above.
Les nappes peuvent contenir des fibres synthétiques thermofusibles. Elles sont comprimées au moyen de calandres chauffées ce qui entraíne la liaison des fibres par la fusion des fibres thermofusibles et améliore la cohésion.The tablecloths may contain synthetic hot-melt fibers. They are compressed by means of heated calenders which causes the fibers to bond by the fusion of hot-melt fibers and improves cohesion.
La première nappe peut être marquée au moyen d'un cylindre pouvant comporter par exemple des bandes parallèles en relief, perpendiculaires à l'axe du cylindre, formant des stries parallèles en surface du produit, ces bandes étant espacées d'une distance comprise entre 1 et 8 mm, de préférence entre 2 et 4 mm. La hauteur des bandes correspondant à la profondeur des stries est d'au moins 0,25 mm et de préférence d'au moins 0,50 mm.The first layer can be marked by means of a cylinder which can include for example parallel bands in relief, perpendicular to the axis of the cylinder, forming parallel streaks on the surface of the product, these bands being spaced from a distance between 1 and 8 mm, preferably between 2 and 4 mm. The height bands corresponding to the depth of the ridges is at least 0.25 mm and preferably at least 0.50 mm.
La seconde face peut être marquée au moyen d'un cylindre comportant par exemple des bandes parallèles en relief, perpendiculaires à l'axe du cylindre, espacées les unes des autres d'une distance comprise entre 0,8 et 1,2 mm. La hauteur des bandes est inférieure à 0,25 mm.The second face can be marked by means of a cylinder comprising by example of parallel bands in relief, perpendicular to the axis of the cylinder, spaced from each other by a distance between 0.8 and 1.2 mm. The height of strips is less than 0.25 mm.
Par la technique de marquage, toute géométrie et répartition des stries peuvent être envisagées, en particulier pour la surface de la première nappe afin de former un relief en creux et en bosse au niveau de la première face. By the marking technique, any geometry and distribution of the streaks can be considered, in particular for the surface of the first ply in order to form a embossed and embossed relief at the level of the first face.
Un exemple de motif réalisé par marquage est illustré par la figure 4D. Les ronds correspondant au motif imprimé forment des creux ou cavités en surface du tampon.An example of a pattern produced by marking is illustrated in FIG. 4D. The circles corresponding to the printed pattern form recesses or cavities on the surface of the buffer.
Suivant un autre mode de réalisation, la seconde face peut être calandrée sans motif de marquage ou consolidée par tout autre moyen connu tel que l'hydroliage, la pulvérisation de liant, le chauffage de fibres thermofusibles si ces dernières sont présentes.According to another embodiment, the second face can be calendered without pattern of marking or consolidated by any other known means such as hydroliage, spraying of binder, heating of hot-melt fibers if they are present.
Les deux nappes ainsi et marquées et/ou consolidées, sont superposées de manière telle que les surfaces marquées et/ou consolidées soient situées à l'extérieur. Elles sont associées par exemple par collage à l'amidon.The two layers thus and marked and / or consolidated, are superimposed so that the marked and / or consolidated surfaces are located outside. They are associated for example by gluing with starch.
Lors de la fabrication du produit, destiné à devenir le tampon selon l'invention, la première face externe est traitée de manière à retarder l'absorption des produits aqueux (produits de soins, ...) pour un usage cosmétique des tampons.During the manufacture of the product, intended to become the tampon according to the invention, the first external face is treated so as to delay the absorption of the products aqueous (care products, ...) for cosmetic use of tampons.
Après les étapes d'imprégnation, et avant ou après le séchage, on traite cette première face en appliquant un agent retardant l'absorption de produits aqueux, précédemment décrit. On applique par exemple une émulsion de cire dans une quantité d'au moins 1 g/m2, ce qui revient à déposer au moins 0,3 g/m2 de matière active (cires).After the impregnation steps, and before or after drying, this first face is treated by applying an agent delaying the absorption of aqueous products, previously described. For example, a wax emulsion is applied in an amount of at least 1 g / m 2 , which amounts to depositing at least 0.3 g / m 2 of active material (waxes).
Ce traitement de surface se fait par tout moyen classique, tel que pulvérisation au moyen de buses, enduction au moyen d'un cylindre, impression par rotogravure ...This surface treatment is done by any conventional means, such as spraying. by means of nozzles, coating by means of a cylinder, rotogravure printing ...
Les produits ainsi fabriqués, ayant des faces différenciées, sont ensuite découpés en formats et emballés dans des emballages souples ou sachets.The products thus produced, having differentiated faces, are then cut into formats and packed in flexible packaging or sachets.
Il est intéressant de noter que du fait de la nouvelle structure de la première face du tampon et de son état de surface, les tampons empilés s'isolent plus facilement les uns des autres. Il est ainsi beaucoup plus facile pour l'utilisateur d'extraire les tampons un par un de l'emballage une fois que l'opercule prédécoupé a été déchiré libérant l'ouverture de l'emballage.It is interesting to note that due to the new structure of the first face of the pad and its surface condition, the stacked pads are more easily insulated each other. This makes it much easier for the user to extract the buffers one by one from the packaging once the pre-cut lid has been torn freeing opening the package.
Claims (18)
Priority Applications (17)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1106723T DE1106723T1 (en) | 1999-12-07 | 1999-12-07 | Skin cleaning disc made of cotton with two different surfaces |
DE29924071U DE29924071U1 (en) | 1999-12-07 | 1999-12-07 | Bulk of hydrophilic cotton for skin care with two different outer sides |
EP99403057A EP1106723B1 (en) | 1999-12-07 | 1999-12-07 | Hydrophilic cotton skin cleansing article having two different external surfaces |
AT99403057T ATE234378T1 (en) | 1999-12-07 | 1999-12-07 | SKIN CLEANSING DISC MADE OF COTTON WITH TWO DIFFERENT SURFACES |
ES99403057T ES2191403T3 (en) | 1999-12-07 | 1999-12-07 | HYDROPHYL COTTON CUSHION INTENDED FOR SKIN CARE AND PRESENTS TWO DIFFERENT EXTERNAL FACES. |
DK99403057T DK1106723T3 (en) | 1999-12-07 | 1999-12-07 | Cushion made of water-sucking cotton wool designed for skin care and comprising two different outer surfaces |
PT99403057T PT1106723E (en) | 1999-12-07 | 1999-12-07 | HYDROPHILIC COTTON COVER FOR DIFFERENT EXTERIOR FACES |
DE69905909T DE69905909T2 (en) | 1999-12-07 | 1999-12-07 | Skin cleaning disc made of cotton with two different surfaces |
PL356051A PL205534B1 (en) | 1999-12-07 | 2000-12-05 | Hydrophilic cotton pad for skin care and comprising two different external surfaces |
BR0016189-6A BR0016189A (en) | 1999-12-07 | 2000-12-05 | Hydrophilic cotton pad intended for skin care and comprising two different external faces |
IL14998500A IL149985A0 (en) | 1999-12-07 | 2000-12-05 | Hydrophilic cotton pad for skin care and comprising two different external surfaces |
JP2001544413A JP4755794B2 (en) | 1999-12-07 | 2000-12-05 | Hydrophilic cotton puff for skin care with two different outer sides |
PCT/FR2000/003395 WO2001042548A2 (en) | 1999-12-07 | 2000-12-05 | Hydrophilic cotton pad for skin care and comprising two different external surfaces |
AU21839/01A AU773036C (en) | 1999-12-07 | 2000-12-05 | Hydrophilic cotton pad for skin care and comprising two different external surfaces |
CA002393356A CA2393356C (en) | 1999-12-07 | 2000-12-05 | Hydrophilic cotton pad for skin care and comprising two different external surfaces |
US10/148,921 US6887486B2 (en) | 1999-12-07 | 2000-12-05 | Hydrophilic cotton pad for skin care comprising two different external surfaces |
NO20022673A NO323311B1 (en) | 1999-12-07 | 2002-06-06 | Hydrophilic cotton pillow for skin care comprising two different outer surfaces |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP99403057A EP1106723B1 (en) | 1999-12-07 | 1999-12-07 | Hydrophilic cotton skin cleansing article having two different external surfaces |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1106723A1 true EP1106723A1 (en) | 2001-06-13 |
EP1106723B1 EP1106723B1 (en) | 2003-03-12 |
Family
ID=8242203
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99403057A Expired - Lifetime EP1106723B1 (en) | 1999-12-07 | 1999-12-07 | Hydrophilic cotton skin cleansing article having two different external surfaces |
Country Status (15)
Country | Link |
---|---|
US (1) | US6887486B2 (en) |
EP (1) | EP1106723B1 (en) |
JP (1) | JP4755794B2 (en) |
AT (1) | ATE234378T1 (en) |
AU (1) | AU773036C (en) |
BR (1) | BR0016189A (en) |
CA (1) | CA2393356C (en) |
DE (2) | DE69905909T2 (en) |
DK (1) | DK1106723T3 (en) |
ES (1) | ES2191403T3 (en) |
IL (1) | IL149985A0 (en) |
NO (1) | NO323311B1 (en) |
PL (1) | PL205534B1 (en) |
PT (1) | PT1106723E (en) |
WO (1) | WO2001042548A2 (en) |
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DE20118212U1 (en) | 2001-11-08 | 2002-02-28 | W. Pelz GmbH & Co., 23812 Wahlstedt | cotton disc |
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EP1764077A2 (en) * | 2005-09-16 | 2007-03-21 | W. Pelz GmbH & Co. KG | Pad for cleaning and peeling of the skin |
FR2920026A1 (en) * | 2007-08-17 | 2009-02-20 | Georgia Pacific France Soc Par | CLEANING AND / OR SKIN CARE COMPRISING A PATTERN IN RELATION TO ITS SURFACE AND METHOD OF MANUFACTURING THE SAME |
WO2012107572A1 (en) * | 2011-02-10 | 2012-08-16 | Leiden University Medical Center | Method for the purification of a glycan and/or a glycoconjugate by chromatography using a stationary phase comprising cotton |
WO2013014259A1 (en) * | 2011-07-28 | 2013-01-31 | Georgia Pacific France | Absorbent fibrous product containing at least 50% of hydrophilic cellulose fibers and including at least two layers, one of which is hydroentangled |
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EP1310226A3 (en) * | 2001-11-08 | 2003-05-28 | W. Pelz GmbH & Co. | Cosmetic cotton pad |
DE20118212U1 (en) | 2001-11-08 | 2002-02-28 | W. Pelz GmbH & Co., 23812 Wahlstedt | cotton disc |
WO2003043551A1 (en) * | 2001-11-20 | 2003-05-30 | Rauscher Consumer Products Gmbh | Flat product |
EP1382730A1 (en) * | 2002-07-15 | 2004-01-21 | Paul Hartmann AG | Cosmetic cotton pad |
WO2004007824A3 (en) * | 2002-07-15 | 2004-03-25 | Hartmann Paul Ag | Cosmetic cotton disc |
DE10361339B4 (en) * | 2003-12-18 | 2015-09-03 | Paul Hartmann Ag | Cosmetic cotton pad and method of making a cosmetic cotton pad |
EP1630276A1 (en) | 2004-08-30 | 2006-03-01 | Paul Hartmann AG | Cotton pad |
EP1676558A1 (en) * | 2004-12-16 | 2006-07-05 | Paul Hartmann AG | Cosmetic pad |
DE102004060623A1 (en) * | 2004-12-16 | 2006-08-03 | Paul Hartmann Ag | cotton pad |
EA012826B1 (en) * | 2005-02-14 | 2009-12-30 | Джорджия-Пасифик Франс | Impregnated fibrous pad |
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EP1764077A3 (en) * | 2005-09-16 | 2009-09-09 | W. Pelz GmbH & Co. KG | Pad for cleaning and peeling of the skin |
EP2039815A1 (en) * | 2007-08-17 | 2009-03-25 | Georgia-Pacific France | Cleaning and/or skin care item comprising a raised pattern on its surface and production method thereof |
FR2920026A1 (en) * | 2007-08-17 | 2009-02-20 | Georgia Pacific France Soc Par | CLEANING AND / OR SKIN CARE COMPRISING A PATTERN IN RELATION TO ITS SURFACE AND METHOD OF MANUFACTURING THE SAME |
WO2012107572A1 (en) * | 2011-02-10 | 2012-08-16 | Leiden University Medical Center | Method for the purification of a glycan and/or a glycoconjugate by chromatography using a stationary phase comprising cotton |
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FR2978460A1 (en) * | 2011-07-28 | 2013-02-01 | Georgia Pacific France | FIBROUS ABSORBENT PRODUCT CONTAINING AT LEAST 50% HYDROPHILIC CELLULOSIC FIBERS AND COMPRISING AT LEAST TWO LAYERS ONE OF WHICH IS HYDROLIATED |
EP3095422A1 (en) | 2015-05-22 | 2016-11-23 | SCA Tissue France | Cotton pad, process and device for its manufacture |
Also Published As
Publication number | Publication date |
---|---|
PL356051A1 (en) | 2004-06-14 |
PT1106723E (en) | 2003-07-31 |
WO2001042548A2 (en) | 2001-06-14 |
EP1106723B1 (en) | 2003-03-12 |
WO2001042548A3 (en) | 2002-02-07 |
AU773036B2 (en) | 2004-05-13 |
ES2191403T3 (en) | 2003-09-01 |
IL149985A0 (en) | 2002-12-01 |
NO323311B1 (en) | 2007-03-12 |
PL205534B1 (en) | 2010-04-30 |
ATE234378T1 (en) | 2003-03-15 |
DE69905909T2 (en) | 2003-11-13 |
NO20022673D0 (en) | 2002-06-06 |
AU2183901A (en) | 2001-06-18 |
DK1106723T3 (en) | 2003-04-22 |
BR0016189A (en) | 2002-08-13 |
NO20022673L (en) | 2002-08-07 |
CA2393356A1 (en) | 2001-06-14 |
AU773036C (en) | 2005-03-10 |
US20030104036A1 (en) | 2003-06-05 |
US6887486B2 (en) | 2005-05-03 |
JP2003516215A (en) | 2003-05-13 |
DE1106723T1 (en) | 2001-10-25 |
DE69905909D1 (en) | 2003-04-17 |
CA2393356C (en) | 2007-07-03 |
JP4755794B2 (en) | 2011-08-24 |
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EP2737118A1 (en) | Absorbent fibrous product containing at least 50% of hydrophilic cellulose fibers and including at least two layers, one of which is hydroentangled |
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