CN113227485A - Method for producing a textile product and textile product obtained thereby - Google Patents

Method for producing a textile product and textile product obtained thereby Download PDF

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Publication number
CN113227485A
CN113227485A CN201980086655.6A CN201980086655A CN113227485A CN 113227485 A CN113227485 A CN 113227485A CN 201980086655 A CN201980086655 A CN 201980086655A CN 113227485 A CN113227485 A CN 113227485A
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Prior art keywords
fabric
binder
titanium dioxide
composition
aqueous composition
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CN201980086655.6A
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Chinese (zh)
Inventor
K·洛伊安
A·哈米特贝利
E·B·欧兹登
H·A·阿克达格
S·阿卡
M·泽瑞克
M·森
S·阿克不勒特
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Sanko Tekstil Isletmeleri Sanayi ve Ticaret AS
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Sanko Tekstil Isletmeleri Sanayi ve Ticaret AS
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Publication of CN113227485A publication Critical patent/CN113227485A/en
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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
    • D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
    • D06M11/32—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with oxygen, ozone, ozonides, oxides, hydroxides or percompounds; Salts derived from anions with an amphoteric element-oxygen bond
    • D06M11/36—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with oxygen, ozone, ozonides, oxides, hydroxides or percompounds; Salts derived from anions with an amphoteric element-oxygen bond with oxides, hydroxides or mixed oxides; with salts derived from anions with an amphoteric element-oxygen bond
    • D06M11/46—Oxides or hydroxides of elements of Groups 4 or 14 of the Periodic Table; Titanates; Zirconates; Stannates; Plumbates
    • 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
    • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
    • D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
    • D06M15/21—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D06M15/227—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds of hydrocarbons, or reaction products thereof, e.g. afterhalogenated or sulfochlorinated
    • D06M15/233—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds of hydrocarbons, or reaction products thereof, e.g. afterhalogenated or sulfochlorinated aromatic, e.g. styrene
    • 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
    • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
    • D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
    • D06M15/21—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D06M15/263—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds of unsaturated carboxylic acids; Salts or esters thereof
    • 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
    • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
    • D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
    • D06M15/37—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • D06M15/564—Polyureas, polyurethanes or other polymers having ureide or urethane links; Precondensation products forming them
    • D06M15/568—Reaction products of isocyanates with polyethers
    • 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
    • D06M23/08—Processes in which the treating agent is applied in powder or granular form
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
    • D06P1/00—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed
    • D06P1/0056—Dyeing with polymeric dyes involving building the polymeric dyes on the fibres
    • D06P1/006—Dyeing with polymeric dyes involving building the polymeric dyes on the fibres by using dyes with polymerisable groups, e.g. dye ---CH=CH2
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
    • D06P1/00—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed
    • D06P1/30—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using sulfur dyes
    • D06P1/305—SO3H-groups containing dyes
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
    • D06P1/00—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed
    • D06P1/44—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
    • D06P1/00—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed
    • D06P1/44—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders
    • D06P1/52—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders using compositions containing synthetic macromolecular substances
    • D06P1/5207—Macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
    • D06P1/5214—Polymers of unsaturated compounds containing no COOH groups or functional derivatives thereof
    • D06P1/5221—Polymers of unsaturated hydrocarbons, e.g. polystyrene polyalkylene
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
    • D06P1/00—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed
    • D06P1/44—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders
    • D06P1/52—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders using compositions containing synthetic macromolecular substances
    • D06P1/5207—Macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
    • D06P1/525—Polymers of unsaturated carboxylic acids or functional derivatives thereof
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
    • D06P1/00—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed
    • D06P1/44—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders
    • D06P1/52—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using insoluble pigments or auxiliary substances, e.g. binders using compositions containing synthetic macromolecular substances
    • D06P1/5264—Macromolecular compounds obtained otherwise than by reactions involving only unsaturated carbon-to-carbon bonds
    • D06P1/5285—Polyurethanes; Polyurea; Polyguanides

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Structural Engineering (AREA)
  • Chemical Or Physical Treatment Of Fibers (AREA)
  • Catalysts (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)

Abstract

The present invention relates to a white yarn dyed fabric with improved opacity, obtainable by a process comprising the steps of: a) providing at least one fabric; b) treating at least a portion of the fabric with an aqueous composition comprising titanium dioxide and at least one crosslinkable binder; and c) heating the fabric obtained in step b).

Description

Method for producing a textile product and textile product obtained thereby
Technical Field
The present invention relates to the field of textiles, in particular to a method for producing a treated textile product and a textile product obtained by the method. The method of the invention improves the impermeability of the textile product.
The invention also relates to compositions suitable for imparting impermeability to textiles to which they are applied, and which are suitable for use in the method.
Background
White garments and clothing are enjoyed by consumers and are in great demand in the marketplace.
However, white garments and clothing have some drawbacks.
For example, white garments typically shine through the color of the skin and/or the color and shape of the user's undergarment when the garment is worn.
To overcome this drawback, heavy fibers or yarns and/or tightly woven yarns may be used to obtain substantially opaque (opaque) non-transparent (non-transparent) fabrics and garments. However, this solution allows to produce a very limited variety of garments and articles of apparel, i.e. for example garments having a certain weight range (below which the problem may arise again).
Typically, titanium dioxide is provided to the fabric to impart uv resistance, antimicrobial and self-cleaning properties. It is also known to subject titanium dioxide or TiO containing materials to the reaction2The composition of (a) is applied to a fabric to obtain an opaque white garment.
KR910006104(B1) discloses a process for the preparation of an impermeable fibrous textile. The fabric comprising polyester filament yarns is impregnated with a solution comprising 4 to 7 weight percent titanium dioxide and 0.1 to 0.5 weight percent dispersant, based on the weight of the treated fabric. The particle size of the titanium dioxide is 0.1-0.4 μm. The solution is applied by dipping for 20 to 30 minutes and fixed on the fabric. The treated fabric is then coated with a transparent resin whose main component is a diisocyanate.
However, the method disclosed in KR910006104(B1) requires two separate steps, namely a step of impregnating the fabric with titanium dioxide and a second step of coating with resin. Therefore, the method disclosed in KR910006104(B1) is a complicated manufacturing method, which additionally requires a long working time. Furthermore, the resin coating covering the titanium dioxide may provide an unpleasant aesthetic appearance to the fabric and thus to the garment containing it.
GB2051163 discloses a method for preparing a composite material by using TiO2A method for preparing an impermeable fabric with improved hiding power.
Moreover, impervious white fabrics known in the art typically begin to gradually decline in whiteness grade after being subjected to several home washes.
Disclosure of Invention
It is an object of the present invention to solve the above problems and to provide a method for improving the opacity (opacity) of fabrics, especially white or light-coloured fabrics.
It is another object of the present invention to provide a method that allows for improved fabric whiteness.
It is another object of the present invention to provide a fabric that is white or has a light color that substantially hides the color of the user's skin and body, or the color or shape of the user's undergarment when the user is wearing a garment containing the fabric.
These and other objects are achieved by the method according to claim 1, which is therefore the object of the present invention.
Another object of the invention is a fabric as claimed in claim 17.
Other objects of the invention are garments as claimed in claim 23 comprising the treated fabric; the aqueous composition of claim 24; and the use of said composition as claimed in claim 26 in the method of the invention.
Brief description of the drawings
Figures 1A and 1B show photographs of sample fabrics before (figure 1A) and after (figure 1B) the process of the invention.
Figures 2A and 2B show photographs at 10 x magnification of a sample fabric before (figure 2A) and after (figure 2B) the process of the invention.
Figures 3A and 3B show photographs at 60 x magnification of sample fabrics before (figure 3A) and after (figure 3B) the process of the invention.
Detailed Description
In the following description, features of the present invention are described with reference to exemplary embodiments; however, any feature of the invention disclosed herein may be combined with one or more other features disclosed herein to provide further embodiments of the invention. This embodiment should be considered as disclosed by the present application.
As mentioned above, the object of the present invention is a process for producing a treated fabric, comprising the following steps:
a) providing at least one fabric;
b) treating at least part of the fabric with an aqueous composition comprising titanium dioxide and at least one binder, preferably a crosslinkable binder; and
c) heating the fabric obtained in step b).
Advantageously, the method of the invention allows the production of textiles suitable for the production of white garments (e.g. lightweight white garments). In fact, it was surprisingly observed that by the method of the invention, the imperviousness of the fabric can be improved while maintaining the fabric white, soft and fashionable (stylish).
In other words, it has been observed that by the method of the present invention, the permeability (transparency) of the fabric can be reduced, so that the user's skin and undergarments can no longer be seen "through" a white fabric garment when the garment containing the fabric of the present invention is worn. Herein, permeability is used to identify the fact that: that is, medium-light white fabrics are not impervious enough to prevent skin/underwear from penetrating the color and shape. In other words, the fabric has low hiding power.
In particular, it has been observed that the titanium dioxide of the composition adheres to the yarns and fibers of the fabric. In addition, it has been observed that when the fabric is treated according to the method of the invention, titanium dioxide is also located between at least some of the yarns of the fabric, for example, between the warp and weft yarns of a woven fabric, thus providing a reduction in permeability relative to an untreated fabric. For example, in the fabric obtainable according to the invention, the titanium dioxide and the binder are also located in the space defined by two adjacent warp yarns and two adjacent weft yarns floating above or below said warp yarns.
Moreover, advantageously, the process of the invention allows to increase the whiteness and the hiding power of the fabric with respect to the untreated fabric.
According to some embodiments, the fabric suitable for use according to the present invention is preferably undyed.
According to the method of the present invention, at least part of the fabric is provided with an aqueous composition comprising titanium dioxide and at least one binder, preferably a crosslinkable binder. In some embodiments, the binder is a compound, e.g., a polymer, suitable for binding the titanium dioxide particles to the fabric or fibers thereof.
The aqueous composition may be applied to the fabric according to techniques known per se in the art. For example, according to some embodiments, the composition may be provided to the fabric by immersion, e.g., by immersing the fabric in a bath containing the composition. According to some embodiments, the composition is provided to the fabric by padding (padding).
Subsequently, the fabric with the aqueous composition is heated.
According to some embodiments, step c) comprises: the fabric is heated at a first temperature to dry the fabric and then heated at a second temperature suitable for curing (i.e., crosslinking) the binder polymer on the fabric, which may be higher than the first temperature.
Advantageously, according to some embodiments, the process of the present invention may be carried out as a continuous process. For example, the process of the present invention may be carried out as a padding process. Padding is a technique known per se in the textile field. Generally, the padding process comprises: a step of impregnating the fabric with an aqueous composition; the impregnated fabric is passed between at least two rollers such that the impregnated fabric is pressed by the two rollers and excess composition is removed. Subsequently, the fabric may be dried and optionally cured.
For example, the fabric may be impregnated by padding with an aqueous composition, preferably at a temperature of from 10 ℃ to 50 ℃, preferably from 20 ℃ to 30 ℃. The pH of the aqueous composition preferably ranges from 4 to 6, more preferably from 4.5 to 5.5. Subsequently, the fabric impregnated with the aqueous composition may be dried and possibly cured so that the binder polymer may be crosslinked.
According to one aspect, the process of the invention allows to obtain a fabric in which the titanium dioxide adheres to the yarns and fibres of the fabric. In particular, it has been observed that the method of the present invention provides a fabric in which titanium dioxide and binder are located between the fabric yarns, for example, at the intersections between the warp and weft yarns of a woven fabric, thereby providing increased hiding power and reduced permeability (transparency) relative to an untreated fabric. For example, in the fabric obtainable according to the invention, titanium dioxide and binder are also located in the space defined by two adjacent warp yarns and by two adjacent weft yarns floating above or below said warp yarns, thereby providing reduced permeability relative to the untreated fabric.
According to some embodiments, the fabric provided in step a) of the inventive process is stretched in at least one direction, for example at least in the weft direction or at least in the warp direction, so that the fabric is stretched during the treatment with the aqueous composition according to step b) of the inventive process, and preferably also during the heating step c).
For example, the fabric may be stretched during the padding step, the heating step, and the curing step.
It has been observed that when the fabric provided in step a) of the process of the invention is stretched, which is stretched during treatment with the aqueous composition, and preferably also during the heating step and the curing step, the spaces between the yarns (e.g. warp and/or weft) are increased, so that the composition can be disposed between the yarns of the fabric in a particularly efficient manner. It has been observed that when the fabric is stretched during the process of the invention, a greater amount of titanium dioxide and binder can be disposed between the yarns of the fabric than in the same fabric which has not been stretched prior to treatment.
According to some embodiments, the fabric provided in step a) of the inventive process is stretched in at least one direction (e.g. at least in the weft direction) by 0.5% to 75%, preferably 0.5% to 60%, more preferably 0.5% to 50% with respect to the initial dimensions of the fabric, such that the fabric is stretched during the treatment with the aqueous composition according to step b) of the inventive process, and also preferably during the heating step c).
For example, when the fabric has a high elongation at break, e.g., a fabric made of or comprising elastomeric yarns or fibers, the fabric may be stretched, according to some embodiments, by 1% to 75%, preferably 5% to 60%, more preferably 10% to 50%, relative to the original dimensions of the fabric. According to some embodiments, the fabric may be stretched at least in the weft direction.
For example, when the fabric has a low elongation at break, e.g., a fabric made substantially of natural yarns or fibers, according to some embodiments, the fabric may be stretched by 0.5% to 5%, preferably 0.75% to 5%, more preferably 1% to 5%, relative to the original dimension (e.g., width) of the fabric. According to some embodiments, the fabric may be stretched at least in the weft direction.
Advantageously, drying and curing the fabric provided with the composition allows a particularly effective and durable bonding of the titanium dioxide to the fabric to be obtained. This is especially true when the adhesive is a crosslinkable adhesive.
According to some embodiments, the cross-linkable adhesive may be a self-crosslinking adhesive. According to some embodiments, the cross-linkable adhesive may be a compound capable of being cross-linked using one or more cross-linking agents. Suitable cross-linking agents may be: for example, a crosslinking agent comprising two or more double bonds.
For example, suitable self-crosslinking binders may be selected from: acrylic polymers, acrylic copolymers and acrylic derivatives; for example, a suitable binder that can be crosslinked using a crosslinking agent is a polyurethane, which can be crosslinked using, for example, an isocyanate.
According to some embodiments, a particularly strong bonding of the titanium dioxide to the fabric can be obtained when the binder is a crosslinkable binder.
According to some embodiments, the glass transition temperature (Tg) of the binder, preferably the crosslinkable binder, ranges from-30 ℃ to 0 ℃, preferably from-25 ℃ to-5 ℃, more preferably from-20 ℃ to-8 ℃. Advantageously, when the glass transition temperature of the binder, in particular of the crosslinkable binder, is within the abovementioned range, a particularly soft treated fabric can be obtained.
Glass transition temperature (Tg) may be measured according to ASTM E1356.
According to some embodiments, the adhesive has a Shore A hardness of ≦ 30 Shore A, preferably 5 Shore A to 25 Shore A, more preferably 10 Shore A to 20 Shore A.
Shore A hardness can be measured according to ASTM D2240.
The binders suitable for use according to the present invention have a glass transition temperature (Tg) and hardness within the above ranges.
As mentioned above, when the binder has a glass transition temperature (Tg) and/or shore a hardness in the above ranges, titanium dioxide may be included in the binder to obtain a particularly soft and impermeable fabric. In particular, the opacity (opacity) of the fabric can be improved without compromising the fabric feel.
According to some embodiments, the binder may be selected from the group consisting of: acrylic polymers, acrylic copolymers and acrylic derivatives, for example, vinyl acrylate, styrene acrylate, butadiene acrylonitrile, carboxylated butadiene acrylonitrile; a resin; polyurethanes and their derivatives, for example, polyether polyurethanes, polyester polyurethanes, polycarbonate polyurethanes, polyester polyether polyurethanes, polyether polycarbonate polyurethanes, polyester polycarbonate polyurethanes; blocked isocyanate; a polyisocyanate; and mixtures thereof. According to some preferred embodiments, the binder may be selected from the group consisting of: butadiene acrylic copolymers, styrene acrylic copolymers, vinyl acrylates, styrene acrylates, butadiene acrylonitriles, carboxylated butadiene acrylonitriles, polyether polyurethanes, polyester polyurethanes, polycarbonate polyurethanes, polyester polyether polyurethanes, polyether polycarbonate polyurethanes, polyester polycarbonate polyurethanes, and mixtures thereof.
For example, currently available products "
Figure BDA0003134075160000071
ES 61 "(Organik kimya) and the commercially available product" heliozan BINDER TOW "(Archroma) are suitable for use as BINDERs in the compositions of the present invention.
For example, the currently available product EDOLAN SN (Tonex Chemicals) is an aliphatic polyether based polyurethane suitable for use in the composition of the invention in combination with a crosslinking agent.
As mentioned above, suitable cross-linking agents may be: for example, a crosslinking agent comprising two or more double bonds. For example, the currently available product EDOLAN XCIB (Tunna chemical) is suitable for use as a cross-linking agent when using EDOLAN SN.
Advantageously, the binder helps to adhere the titanium dioxide to the fabric.
Advantageously, the present invention allows for the production of treated fabrics that can withstand multiple home launderings. In other words, the present invention allows for the production of treated fabrics that can be subjected to multiple home washes while maintaining substantially the same imperviousness and whiteness characteristics. In particular, it has been observed that the imperviousness and whiteness characteristics of the fabrics treated according to the invention also remained essentially unchanged after 15 home washes.
According to some embodiments, prior to said step b), the fabric may be included in a garment, for example cut into garments. In this case, for example, the aqueous composition containing titanium dioxide and binder may be provided to the garment by impregnation (e.g., by soaking). Subsequently, the garment may be heated to dry and secure the composition to the garment.
According to some embodiments, the amount of titanium dioxide in the aqueous composition is from 0.5% to 40% by weight of the composition, preferably from 5% to 30% by weight, more preferably from 10% to 20% by weight.
According to some embodiments, the titanium dioxide has an average particle size of 0.25 μm to 4 μm, preferably 0.4 μm to 3 μm, more preferably 0.5 μm to 2 μm.
According to some embodiments, the amount of binder in the aqueous composition is from 0.5% to 10% by weight of the composition, preferably from 2% to 8% by weight, more preferably from 4% to 6% by weight.
According to some embodiments, the amount of binder in the aqueous composition is less than the amount of titanium dioxide in the aqueous composition. In this case, advantageously, a white treated fabric having a particularly favorable appearance and feel can be obtained.
According to some embodiments, the composition may further comprise at least one whitening agent. Advantageously, when the aqueous composition comprises a whitening agent, a particularly bright white treated fabric can be obtained.
According to some embodiments, the whitening agent is preferably a stilbene or stilbene derivative, more preferably a triazine stilbene disulfonic acid or derivative thereof. As an example of a whitening agent, according to the invention, a product is currently available "
Figure BDA0003134075160000081
BSUN "(Tanatex Chemicals B.V.)) exampleAre useful in such compositions.
According to some embodiments, the amount of whitening agent in the aqueous composition is from 0.5 to 10 wt%, preferably from 1 to 8 wt%, more preferably from 2 to 5 wt%.
According to some embodiments, the aqueous composition may further comprise at least one dispersant. As used herein, the term "dispersant" refers to an agent suitable for inclusion in a dispersion (e.g., an aqueous composition) to improve particle separation in the dispersion and prevent settling or clumping.
According to some embodiments, the amount of dispersant is from 0.01% to 2% by weight of the composition, preferably from 0.1% to 1% by weight, more preferably from 0.4% to 0.6% by weight.
According to some embodiments, the dispersant is selected from: polyacrylates, and preferably acrylic copolymers. As an example of dispersants, products which are currently commercially available according to the invention "
Figure BDA0003134075160000082
SN100 "(BASF) and" SANYON DQ "are suitable for use in the composition.
It has been observed that when the aqueous composition comprises a dispersant, the distribution of titanium dioxide on the fabric is particularly uniform.
According to some embodiments, the aqueous composition may further comprise at least one stabilizer. As used herein, the term "stabilizer" refers to an agent that substantially prevents a physical and/or chemical change in a composition comprising the same. Stabilizers are known and can act as foam inhibitors (foam suppressants) and/or prevent the formation of polymer films on padding rollers (padding rollers).
According to some embodiments, the amount of stabilizer is from 0.01% to 2% by weight of the composition, preferably from 0.1% to 1% by weight, more preferably from 0.2% to 0.5% by weight.
According to some embodiments, the stabilizing agent is an alkoxylated compound and a mixture of alkoxylates. As examples of stabilizers, the currently available products "VITEXOL PFA" (Pasteur Corp.) and "HELIZARIN COMP.
According to some embodiments, the aqueous composition may further comprise at least one wetting agent. According to some embodiments, the amount of wetting agent is from 0.01 to 2 wt%, preferably from 0.1 to 1 wt%, more preferably from 0.2 to 0.4 wt% of the composition.
According to some embodiments, the wetting agent is a non-ionic wetting agent, preferably selected from: sulfonate and phosphonate nonionic wetting agents. As an example of a wetting agent, the currently available product "COTTOCLARIN TR CT" (BRP Kimya) is suitable for use in the composition according to the present invention.
According to some embodiments, the aqueous composition may further comprise at least one mineral filler other than titanium dioxide. According to some embodiments, the amount of mineral filler is from 0.01 to 20 wt%, preferably from 0.5 to 10 wt%, more preferably from 1 to 5 wt% of the composition. According to some embodiments, the mineral filler may be selected from: calcium carbonate, calcium sulfate, kaolin, talc and mixtures thereof.
The process of the present invention can be carried out using any type of fabric. According to some embodiments, the fabric is a woven fabric, preferably a twill fabric, and more preferably a denim fabric.
According to some embodiments, the fabric may comprise natural fibers, regenerated fibers, synthetic fibers, and mixtures thereof.
According to some embodiments, the fabric may comprise natural yarns and/or recycled fibers and/or synthetic yarns and/or hybrid yarns. In the present description, a natural yarn is a yarn comprising natural fibers, which may be selected from cotton, wool, flax (flax), kenaf, ramie, hemp, flax (linen) and mixtures thereof.
In this specification, a regenerated yarn is a yarn comprising regenerated fibres, which may be selected from: such as viscose (viscose), modal, tencel (tencel) and mixtures thereof.
In this specification, synthetic yarns are yarns comprising synthetic fibers which may be selected from the group consisting of polyester, nylon, polyurethane, spandex (elastic), acrylic, modacrylic, acetate, polyolefin, vinyl, and mixtures thereof.
In the present specification, the blend yarn is a yarn comprising at least two fibers from among natural fibers (e.g., cotton), regenerated fibers, and synthetic fibers.
As mentioned above, according to some embodiments, step c) of the method of the invention may comprise the steps of: the fabric is heated at a first temperature to dry the fabric and then at a second temperature, i.e., to crosslink the binder applied to the fabric, the fabric having an aqueous composition comprising titanium dioxide and at least one binder.
According to some embodiments, the first temperature range is from 90 ℃ to 200 ℃, preferably from 100 ℃ to 160 ℃, more preferably from 110 ℃ to 150 ℃. According to some embodiments, the second temperature range is from 150 ℃ to 200 ℃, preferably from 160 ℃ to 180 ℃. As described above, according to some embodiments, the second temperature is higher than the first temperature.
Advantageously, the process according to the invention is particularly rapid and easy to carry out. For example, according to some embodiments, step b) of treating the fabric with an aqueous composition comprising titanium dioxide and a binder may last for 0.1 seconds to 60 seconds, preferably 0.5 seconds to 30 seconds, more preferably 1 second to 10 seconds.
For example, according to some embodiments, the step of curing the drying fabric may last from 15 seconds to 90 seconds, preferably from 30 seconds to 60 seconds.
Another object of the present invention is a fabric obtainable by the process according to the invention, i.e. a fabric treated according to said process to increase its impermeability.
As mentioned above, it has been observed that in the fabric obtainable according to the invention, the titanium dioxide adheres to the yarns and fibres of the fabric. It has also been observed that in the fabric obtainable according to the invention, titanium dioxide is also located between the fabric yarns, for example at the crossing points between the warp and weft yarns of the woven fabric, thus providing a reduced permeability, i.e. an increased hiding power, relative to the untreated fabric.
For example, in the fabric obtainable according to the invention, the titanium dioxide and the binder are also located in the space defined by two adjacent warp yarns and two adjacent weft yarns floating above or below said warp yarns.
According to some embodiments, the fabric is a woven fabric comprising weft yarns and warp yarns woven together, and wherein at least a portion of the titanium dioxide is located at the intersections between the weft yarns and warp yarns (i.e., the binder comprising titanium dioxide also remains in the points where the warp yarns and weft yarns intersect) and in the spaces defined by two adjacent warp yarns and two adjacent weft yarns that float above or below the warp yarns. The presence of titanium dioxide at these locations significantly improves the opacity (or hiding power) without the use of low Ne yarns (i.e., high linear density yarns). According to some embodiments, the fabric may be a twill fabric, preferably a denim fabric.
It has been observed that the relative amount of titanium dioxide disposed between the fabric yarns (e.g., between the warp and weft yarns) varies depending on the structure/fabric stretch of the fabric during the process of the present invention. For example, as the warp yarn density increases, the relative amounts of titanium dioxide and binder between warp yarns decreases.
For example, when the fabric is stretched during the process of the present invention, the relative amounts of titanium dioxide and binder between the warp yarns of the fabric are increased relative to the same fabric that is less stretched or unstretched during the process.
The words "treated fabric", "finished fabric" refer to the fabric obtained by the process of the invention, i.e. the fabric used for clothing. Thus, the following characteristics and properties of the fabric refer to the dry final treated fabric that is found in the garment.
According to some embodiments, the titanium dioxide in the treated fabric has an average particle size of 0.25 μm to 4 μm, preferably 0.4 μm to 3 μm, more preferably 0.5 μm to 2 μm.
According to some embodiments, the amount of titanium dioxide in the final treated fabric is from 3 to 10% by weight of the total weight of the treated fabric, preferably from 6 to 8% by weight of the total weight of the treated fabric (i.e. the treated dry fabric).
According to some embodiments, the amount of titanium dioxide in the aqueous composition may be selected to obtain a final treated fabric, wherein the amount of titanium dioxide is from 3 to 10% by weight of the total weight of the fabric, preferably from 6 to 8% by weight of the total weight of the fabric.
According to some embodiments, the amount of binder in the final treated fabric (e.g., the fabric comprised in the garment) is from 0.5 to 4 wt% of the total weight of the treated fabric, preferably from 2 to 3.5 wt% of the total weight of the treated fabric.
According to some embodiments, the amount of binder in the aqueous composition may be selected to obtain a treated fabric, wherein the amount of binder is from 0.5 to 4 wt% of the total weight of the fabric, preferably from 2 to 3.5 wt% of the total weight of the fabric.
According to some embodiments, the amount of binder in the fabric is less than the amount of titanium dioxide in the fabric. In this case, as discussed above, a white treated fabric having a particularly favorable appearance and feel can be advantageously obtained. For example, the treated fabric of the present invention may comprise titanium dioxide in an amount of from 5 to 10 wt%, preferably from 6 to 8 wt%, and a binder in an amount of from 1 to 5 wt%, preferably from 2 to 4 wt%, based on the total weight of the treated fabric.
Advantageously, the final treated fabric of the present invention is wash durable. In particular, the imperviousness and whiteness of the fabric are not significantly affected or reduced, even after multiple wash home washing.
Opacity and whiteness can be measured according to known methods, for example by using spectrophotometric techniques.
As used herein, the term "opacity" refers to the hiding power of a textile (i.e., refers to the quality of a textile that is difficult to see through). For example, the higher the opacity of the fabric, the more difficult it is to see through the fabric. In other words, the more impervious the fabric, i.e., the less impervious the fabric, the more the fabric will prevent the contents beneath the fabric from being exposed through the fabric. .
According to some embodiments, the glass transition temperature (Tg) of the adhesive ranges from-30 ℃ to 0 ℃, preferably from-25 ℃ to-5 ℃, more preferably from-20 ℃ to-8 ℃. In this case, it is advantageously possible to obtain a particularly soft treated fabric.
Glass transition temperature (Tg) may be measured according to ASTM E1356.
According to some embodiments, the adhesive has a Shore A hardness of ≦ 30 Shore A, preferably 5 Shore A to 25 Shore A, more preferably 10 Shore A to 20 Shore A.
Shore A hardness can be measured according to ASTM D2240.
As mentioned above, when the adhesive has a glass transition temperature (Tg) and/or shore a hardness in the above ranges, a particularly soft and impermeable fabric can be obtained.
According to some embodiments, the fabric of the present invention may optionally comprise, in addition to titanium dioxide and at least one binder, one or more whitening agents and/or one or more dispersing agents and/or one or more stabilizing agents and/or one or more wetting agents.
According to some embodiments, the final treated fabric may comprise a whitening agent in an amount of 0.5 to 3 wt%, preferably 1 to 2 wt%, of the total weight of the treated fabric. According to some embodiments, the amount of whitening agent in the aqueous composition may be selected to obtain a fabric, wherein the amount of whitening agent is from 0.5 to 3 wt%, preferably from 1 to 2 wt%, of the total weight of the treated fabric.
According to some embodiments, the fabric may comprise a dispersant in an amount of from 0.1 to 1 wt%, preferably from 0.2 to 0.5 wt%, based on the total weight of the treated fabric. According to some embodiments, the amount of dispersant in the aqueous composition may be selected to obtain a fabric, wherein the amount of dispersant is from 0.1 to 1 wt%, preferably from 0.2 to 0.5 wt%, based on the total weight of the treated fabric.
According to some embodiments, the fabric of the invention may comprise a stabilizer in an amount of from 0.1 to 0.5 wt%, preferably from 0.2 to 0.4 wt%, based on the total weight of the treated fabric. According to some embodiments, the amount of stabilizer in the aqueous composition may be selected to obtain a treated fabric, wherein the amount of stabilizer is from 0.1 to 0.5 wt%, preferably from 0.2 to 0.4 wt% of the total weight of the treated fabric.
According to some embodiments, the fabric of the present invention may comprise a wetting agent in an amount of from 0.05 to 0.5 wt%, preferably from 0.1 to 0.4 wt%, based on the total weight of the fabric. According to some embodiments, the amount of wetting agent in the aqueous composition may be selected to obtain a treated fabric, wherein the amount of wetting agent is from 0.05 to 0.5 wt%, preferably from 0.1 to 0.4 wt%, of the total weight of the fabric.
The composition on the fabric of the present invention can be analyzed according to known methods to determine the amount of ingredients contained in the dried, cured composition. For example, titanium dioxide can be extracted from the treated fabric and isolated according to known methods and characterized according to ASTM D1394-chemical analysis test for white titanium pigments.
According to one aspect of the invention, the fabric of the invention is suitable for cutting into garments. Another object of the invention is a garment comprising a fabric according to the invention. Advantageously, the skin of the user is not (partially) visible through the fabric treated according to the invention. Similarly, any undergarment worn by the user below the garment according to the invention cannot be seen through the garment.
Another object of the present invention is an aqueous composition for the treatment of textiles (i.e. fabrics, preferably woven fabrics) comprising:
titanium dioxide in an amount ranging from 5 to 500 g/l, preferably from 50 to 400 g/l, more preferably from 75 to 300 g/l, even more preferably from 90 to 200 g/l; and
at least one binder, preferably a cross-linkable binder, in an amount ranging from 1 g/l to 100 g/l, preferably from 10 g/l to 80 g/l, more preferably from 30 g/l to 70 g/l, even more preferably from 35 g/l to 60 g/l.
According to some embodiments, the aqueous composition may comprise:
titanium dioxide in a content ranging from 0.5% to 40% by weight, preferably from 5% to 30% by weight, more preferably from 10% to 20% by weight of the composition; and
at least one binder, preferably a crosslinkable binder, in a content ranging from 0.5% to 10% by weight, preferably from 2% to 8% by weight, more preferably from 4% to 6% by weight of the composition.
Aqueous compositions, which are the object of the present invention, are suitable for use in the process of the present invention. Thus, the features of the aqueous composition disclosed above in relation to the composition in the method of the invention are intended to apply to the composition itself, and vice versa, i.e. the features disclosed herein in relation to the aqueous composition itself are intended to apply to the composition in the method of the invention.
Advantageously, the aqueous composition may be produced by known methods. For example, it may be produced by mixing different ingredients. According to some embodiments, ingredients may be provided and mixed together to obtain an aqueous composition. According to some embodiments, two or more ingredients may be provided sequentially during mixing.
According to some embodiments, the pH of the aqueous composition may range from 4 to 6, preferably from 4.5 to 5. According to some embodiments, the aqueous composition further comprises at least one whitening agent in an amount of from 0.5% to 10% by weight of the composition, preferably from 1% to 8% by weight, more preferably from 2% to 5% by weight.
According to some embodiments, the aqueous composition comprises:
5 g/l to 500 g/l of titanium dioxide;
1 to 100 g/l of at least one binder.
According to some embodiments, the concentration of titanium dioxide in the aqueous composition may range from 50 to 400 grams per liter, preferably from 75 to 300 grams per liter, more preferably from 90 to 200 grams per liter.
According to some embodiments, the concentration of the binder in the aqueous composition may range from 10 to 80 g/l, preferably from 30 to 70 g/l, more preferably from 35 to 60 g/l.
According to some embodiments, the aqueous composition may further comprise one or more whitening agents. According to some embodiments, the concentration of the whitening agent in the aqueous composition may range from 5 to 40 g/l, preferably from 10 to 35 g/l, more preferably from 15 to 30 g/l.
According to some embodiments, the aqueous composition may further comprise one or more dispersants. According to some embodiments, the concentration of the dispersant in the aqueous composition may range from 1 g/l to 20 g/l, preferably from 2.5 g/l to 10 g/l, more preferably from 4 g/l to 6 g/l.
According to some embodiments, the aqueous composition may further comprise one or more stabilizers. According to some embodiments, the concentration of the stabilizing agent in the aqueous composition may range from 1 to 10 grams per liter, preferably from 2 to 6 grams per liter, more preferably from 3 to 5 grams per liter.
According to some embodiments, the aqueous composition may further comprise one or more wetting agents. According to some embodiments, the concentration of the wetting agent in the aqueous composition may range from 0.5 to 10 grams per liter, preferably from 1 to 5 grams per liter, more preferably from 2 to 4 grams per liter.
According to some embodiments, the aqueous composition may further comprise one or more mineral fillers other than titanium dioxide. According to some embodiments, the concentration of the mineral filler other than titanium dioxide in the aqueous composition may range from 10 to 100 grams per liter of the at least one mineral filler, preferably from 10 to 50 grams per liter of the at least one mineral filler. According to some embodiments, the mineral filler is selected from the group consisting of: calcium carbonate, calcium sulfate, kaolin, talc and mixtures thereof.
The object of the present invention is the use of a composition according to the invention in a method according to the invention.
Advantageously, the present invention allows to obtain white fabrics in a simpler, faster and cheaper way with respect to the methods known in the art.
Experimental part
Example 1 composition
Example 1 refers to a different embodiment of the aqueous composition of the present invention.
In all exemplary compositions, the final volume of the aqueous composition was 1 liter.
Composition 1:
titanium dioxide 100 g/l
Figure BDA0003134075160000161
ES 6140 g/l
Water until a final volume of 1 liter is reached.
Composition 2:
titanium dioxide 100 g/l
Figure BDA0003134075160000162
ES 6140 g/l
SANYON DQ 5 g/L
HELIZARIN COMP. PFA 4 g/L
Figure BDA0003134075160000163
B SUN 20 g/l
Cottoclain TR CT 3 g/l
Water until a final volume of 1 liter is reached.
Composition 3:
titanium dioxide 100 g/l
Figure BDA0003134075160000164
ES 6140 g/l
SANYON DQ 5 g/L
HELIZARIN COMP. PFA 4 g/L
Cottoclain TR CT 3 g/l
Water until a final volume of 1 liter is reached.
In the above-mentioned compositions 1 to 3,
Figure BDA0003134075160000165
ES 61 (styrene acrylic copolymer with Tg-12 ℃) is a binder, SANYON DQ is a dispersant, HELIZARIN COMP. PFA is a stabilizer,
Figure BDA0003134075160000166
b SUN is a whitening agent and cottacrine TR CT is a wetting agent.
Composition 4:
titanium dioxide: 100 g/l
HELIZARIN BINDER TOW 46 g/L
SANYON DQ 5 g/l
HELIZARIN COMP. PFA 4 g/L
Cottoclain TR CT 3 g/l
Water: until a final volume of 1 liter is reached.
Composition 5:
titanium dioxide: 100 g/l
HELIZARIN BINDER TOW 46 g/L
SANYON DQ 5 g/l
HELIZARIN COMP. PFA 4 g/L
Figure BDA0003134075160000171
SUN 20 g/l
Cottoclain TR CT 3 g/l
Water: until a final volume of 1 liter is reached.
In the above compositions 4 to 5, HELIZARIN BINDER TOW (acrylic copolymer having Tg-18 ℃ C. is a binder, SANYON DQ is a dispersant, HELIZARIN COMP. PFA is a stabilizer,
Figure BDA0003134075160000172
b SUN is a whitening agent and cottacrine TR CT is a wetting agent.
Composition 6:
titanium dioxide: 100 g/l
EDOLAN SN 30 g/L
EDOLAN XCIB 5 g/L
SANYON DQ 5 g/l
HELIZARIN COMP. PFA 4 g/L
Cottoclain TR CT 3 g/l
Water: until a final volume of 1 liter is reached.
Composition 7:
titanium dioxide: 100 g/l
EDOLAN SN 30 g/L
EDOLAN XCIB 5 g/L
SANYON DQ 5 g/l
HELIZARIN COMP. PFA 4 g/L
Figure BDA0003134075160000181
B-SUN 20 g/l
Cottoclain TR CT 3 g/l
Water: until a final volume of 1 liter is reached.
In the above compositions 6 to 7, EDOLAN SN (aliphatic polyether based polyurethane) is an adhesive, EDOLAN XCIB is a cross-linking agent, SANYON DQ is a dispersant, HELIZARIN COMP.PFA is a stabilizer,
Figure BDA0003134075160000182
b SUN is a whitening agent and cottacrine TR CT is a wetting agent. The binder EDOLAN SN crosslinked with the crosslinking agent EDOLAN XCIB had a shore a hardness of 20 ° shore a.
All of the above compositions 1 to 7 are produced by mixing all the ingredients and stirring to obtain a homogeneous mixture (e.g., stirring for about 30 minutes).
Example 2 production of treated Fabric
Treated Fabric 1
The cotton woven fabric was treated with "composition 1" according to example 1.
The aqueous composition is applied by padding.
The fabric was dried at 150 ℃ and cured at 180 ℃ for 45 seconds.
The treated fabric obtained had:
titanium dioxide, about 7% by weight
Binder, about 2.8 wt%.
The amounts are expressed as weight percentages relative to the total weight of the treated fabric.
Treated Fabric 2
The cotton woven fabric was treated with "composition 3" according to example 1.
The aqueous composition is applied by padding.
The fabric was dried at 150 ℃ and cured at 180 ℃ for 45 seconds.
The treated fabric obtained had:
titanium dioxide, about 7% by weight
Binder, about 2.8% by weight
Dispersant, about 0.35 wt%.
Stabilizer, about 0.28 wt%.
Wetting agent, about 0.2 wt%.
The amounts are expressed as weight percentages relative to the total weight of the treated fabric.
Treated fabric 3
The cotton woven fabric was treated with "composition 4" according to example 1.
The aqueous composition is applied by padding.
The fabric was dried at 150 ℃ and cured at 180 ℃ for 45 seconds.
The treated fabric obtained had:
titanium dioxide, about 7% by weight
Binder, about 3.22% by weight
Dispersant, about 0.35 wt%.
Stabilizer, about 0.28 wt%.
Wetting agent, about 0.2 wt%.
The amounts are expressed as weight percentages relative to the total weight of the treated fabric.
Treated fabric 4
The cotton woven fabric was treated with "composition 6" according to example 1.
The aqueous composition is applied by padding.
The fabric was dried at 150 ℃ and cured at 180 ℃ for 45 seconds.
The treated fabric obtained had:
titanium dioxide, about 7% by weight
Binder, about 2.1% by weight
Crosslinker, about 0.35 wt.%.
Dispersant, about 0.35 wt%.
Stabilizer, about 0.28 wt%.
Wetting agent, about 0.2 wt%.
The amounts are expressed as weight percent of the total weight of the treated fabric.
Example 3-evaluation of opacity and CMC DE (color Difference) of exemplary treated fabrics
The opacity and CMC DE (colour difference) of the three samples before and after the process of the invention were measured.
In particular, the fabric was treated according to example 2 to obtain "treated fabric 1", "treated fabric 3", "treated fabric 4".
The opacity and CMC DE (colour difference) were measured spectrophotometrically by a Datacolor 600 spectrophotometer using white and black background cards, according to methods known per se.
According to the following formula, in terms of single-chip light reflection coefficient R0The imperviousness of the fabric was measured on a paper backing at a ratio expressed as a percentage of the intrinsic light reflection coefficient R ∞ of the same sample:
impermeability of 100x R0/R∞
Single sheet light reflection coefficient "R0"is defined as the light reflectance of a single piece of fabric backed by black cells.
Intrinsic light reflection coefficient "R∞"is defined as the light reflectance of a fabric layer or pad having a thickness such that further increases in the thickness of the layer or pad do not result in a change in the measured reflectance. In this case, the single piece of fabric is a single piece of fabric when unfolded, and thus the thickness of the layer or pad corresponds to the thickness of the single piece of fabric. For example, the thickness of the layer or pad may be increased until a certain thickness is reached (which provides a reflectance value that does not change as the thickness of the layer or pad is further increased) by: the fabric is folded so that two or more portions of the same fabric are superimposed, thereby increasing the thickness of the layer or pad to be analyzed.
"CMC DE" is the difference between the sample color and the reference color. CMC DE was measured by Datacolor 600 spectrophotometer using white and black background cards. First, the fabric was placed on a white background and the reflectance was measured using a Datacolor 600 spectrophotometer as a reference value. Then, the same fabric was placed on a black background, and the reflectance was measured using Datacolor 600 as a sample value. The CMC DE (i.e. the color difference) between the fabric on a white background and the fabric on a black background is determined spectrophotometrically according to known methods. The smaller the CMC DE value, the less impervious the fabric. In other words, the less impermeable the fabric, the less the color difference between the white and black colors of the fabric.
The following results were obtained:
untreated fabric
CMC DE:3.17
Impermeability: 87 percent of
According to implementationTreated Fabric 1 of example 2
CMC DE:1.84
Impermeability: 95 percent
Treated fabric 3 according to example 2
CMC DE:1.90
Impermeability: 95.8 percent
Treated fabric 4 according to example 2
CMC DE:1.91
Impermeability: 95.32 percent
It can be observed that, in the case of "treated fabric 1", the method of the invention provides an increase in the imperviousness of the fabric of about 8% with respect to the untreated fabric. Moreover, the method of the present invention results in a reduction in CMC DE (i.e., color difference) of about 42% relative to the untreated fabric.
In the case of "treated fabric 3", the method of the invention results in an increase in the imperviousness of the fabric of about 8.8% relative to the untreated fabric. Moreover, the method of the present invention results in a reduction in CMC DE (i.e., color difference) of about 40% relative to the untreated fabric.
In the case of "treated fabric 4", the method of the invention results in an increase in the imperviousness of the fabric of about 8.3% relative to the untreated fabric. Moreover, the process of the present invention resulted in a reduction in CMC DE (i.e., color difference) of about 39.7% relative to the untreated fabric.
The results obtainable by the process of the invention can also be observed in the accompanying drawing, which shows sample fabrics before and after the process of the invention at different magnifications.
Specifically, fig. 1A and 1B are photographs showing sample fabrics before (fig. 1A) and after (fig. 1B) the method of the present invention.
Fig. 2A and 2B are photographs taken at a magnification of 10 times, and fig. 3A and 3B are photographs taken at a magnification of 60 times.
It can be observed, for example, from fig. 1 and 1B and fig. 2A and 2B that the treated fabric of the present invention has improved opacity and whiteness relative to untreated fabric.
In fig. 3B, titanium dioxide particles between the fibers and yarns of the treated fabric can be observed. This particle was not observed in figure 3A showing untreated fabric. Fig. 3A and 3B show that the present invention advantageously provides titanium dioxide to the fabric effectively.

Claims (26)

1. A method for producing a fabric, the method comprising the steps of:
a) providing at least one fabric;
b) treating at least part of the fabric with an aqueous composition comprising titanium dioxide and at least one binder, preferably a crosslinkable binder; and
c) heating the fabric obtained in step b).
2. The method of claim 1, wherein the step c) comprises: the fabric is heated at a first temperature to dry the fabric and then heated at a second temperature, preferably higher than the first temperature, to crosslink the binder on the fabric.
3. The method according to claim 1 or 2, wherein the fabric provided in step a) is stretched in at least one direction so that the fabric is in a stretched state during the treatment with the aqueous composition according to step b) of the method of the invention, and preferably also during the heating step c).
4. A method according to claim 3, wherein the fabric provided in step a) is stretched at least in the weft direction by 0.5% to 75%, preferably 0.5% to 60%, more preferably 0.5% to 50%, relative to the initial dimensions of the fabric.
5. A method according to any one of claims 1 to 4, wherein in step b) the aqueous composition is provided to the fabric by padding.
6. The method of any one of the preceding claims, wherein the binder is selected from the group consisting of: acrylic polymers, acrylic copolymers and acrylic derivatives, resins, polyurethanes and polyurethane derivatives, blocked isocyanates, polyisocyanates and mixtures thereof, and is preferably selected from the group consisting of: butadiene acrylic copolymers, styrene acrylic copolymers, vinyl acrylates, styrene acrylates, butadiene acrylonitriles, carboxylated butadiene acrylonitriles, polyether polyurethanes, polyester polyurethanes, polycarbonate polyurethanes, polyester polyether polyurethanes, polyether polycarbonate polyurethanes, polyester polycarbonate polyurethanes, and mixtures thereof.
7. The process according to any one of the preceding claims, wherein the glass transition temperature (Tg) of the binder, preferably the crosslinkable binder, ranges from-30 ℃ to 0 ℃, preferably from-25 ℃ to-5 ℃, more preferably from-20 ℃ to-8 ℃.
8. The method according to any one of the preceding claims, wherein the adhesive has a shore a hardness of ≤ 30 ° shore a, preferably 5 ° shore a to 25 ° shore a, more preferably 10 ° shore a to 20 ° shore a.
9. The method of any one of the preceding claims, wherein the fabric is incorporated into a garment prior to step b).
10. A process according to any one of the preceding claims, wherein the titanium dioxide in the composition is in the range 5 to 500 g/l, preferably 50 to 400 g/l, more preferably 75 to 300 g/l, more preferably 90 to 200 g/l.
11. The process according to any one of the preceding claims, wherein the titanium dioxide has an average particle size in the range of 0.25 to 4 μm, preferably 0.4 to 3 μm, more preferably 0.5 to 2 μm.
12. The method of any one of the preceding claims, wherein the binder in the composition ranges from 1 to 100 g/l, preferably from 10 to 80 g/l, more preferably from 30 to 70 g/l, even more preferably from 35 to 60 g/l.
13. A method according to any preceding claim, wherein the composition further comprises at least one whitening agent, preferably a stilbene or stilbene derivative, more preferably a triazine stilbene disulphonic acid or derivative thereof.
14. A method according to claim 13, wherein the amount of whitening agent in the composition is from 5 to 40 g/l, preferably from 10 to 35 g/l, more preferably from 15 to 30 g/l.
15. The method of any one of claims 2 to 14, wherein the first temperature range is 90 ℃ to 200 ℃, preferably 100 ℃ to 160 ℃, more preferably 110 ℃ to 150 ℃.
16. The method of any one of claims 2 to 15, wherein the second temperature range is 150 ℃ to 200 ℃, preferably 160 ° to 180 ℃.
17. A fabric obtainable by the method of any one of claims 1 to 17.
18. The fabric of claim 17, wherein the fabric is a woven fabric comprising weft yarns and warp yarns woven together, and wherein at least a portion of the titanium dioxide and the adhesive are located in a space defined by two adjacent warp yarns and two adjacent weft yarns floating above or below the warp yarns.
19. A fabric according to claim 18, wherein the fabric is a twill fabric, preferably a denim fabric.
20. A fabric according to any one of claims 17 to 19, wherein the titanium dioxide has an average particle size in the range 0.25 μm to 4 μm, preferably 0.4 μm to 3 μm, more preferably 0.5 μm to 2 μm.
21. A fabric according to any one of claims 17 to 20, wherein the amount of titanium dioxide is from 3 to 10% by weight of the fabric, preferably from 6 to 8% by weight of the total weight of the fabric.
22. The fabric of any one of claims 17 to 21, wherein the amount of binder is from 0.5 to 4% by weight of the fabric, preferably from 2 to 3% by weight of the total weight of the fabric.
23. A garment comprising the fabric of any one of claims 17 to 22.
24. Aqueous composition for treating textiles, preferably fabrics, comprising:
titanium dioxide in an amount ranging from 5 to 500 g/l, preferably from 50 to 400 g/l, more preferably from 75 to 300 g/l, even more preferably from 90 to 200 g/l; and
at least one binder, preferably a cross-linkable binder, in an amount ranging from 1 g/l to 100 g/l, preferably from 10 g/l to 80 g/l, more preferably from 30 g/l to 70 g/l, even more preferably from 35 g/l to 60 g/l.
25. The composition according to claim 24, further comprising at least one whitening agent in an amount of from 5 to 40 g/l, preferably from 10 to 35 g/l, more preferably from 15 to 30 g/l.
26. Use of a composition according to claim 24 or 25 in a method according to any one of claims 1 to 16.
CN201980086655.6A 2018-12-28 2019-12-20 Method for producing a textile product and textile product obtained thereby Pending CN113227485A (en)

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