WO2007099951A1 - 人工皮革およびその製造方法 - Google Patents
人工皮革およびその製造方法 Download PDFInfo
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- WO2007099951A1 WO2007099951A1 PCT/JP2007/053634 JP2007053634W WO2007099951A1 WO 2007099951 A1 WO2007099951 A1 WO 2007099951A1 JP 2007053634 W JP2007053634 W JP 2007053634W WO 2007099951 A1 WO2007099951 A1 WO 2007099951A1
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- Prior art keywords
- fiber
- artificial leather
- elastic body
- polymer elastic
- ultrafine
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Classifications
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/0002—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate
- D06N3/0004—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate using ultra-fine two-component fibres, e.g. island/sea, or ultra-fine one component fibres (< 1 denier)
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/12—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins
- D06N3/14—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins with polyurethanes
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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
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24355—Continuous and nonuniform or irregular surface on layer or component [e.g., roofing, etc.]
- Y10T428/24438—Artificial wood or leather grain surface
Definitions
- the present invention relates to artificial leather and a method for producing the same.
- a leather having excellent functionality by impregnating a fiber entangled body such as a nonwoven fabric or a woven or knitted fabric, or a sheet-like material such as various processed products with a polymer elastic body solution or dispersion liquid represented by polyurethane or the like. It is well known to manufacture such a sheet and is widely practiced industrially.
- the resultant artificial leather is inferior in the hard texture.
- a polymer elastic body is imparted to the fiber entangled body, the ultrafine fiber-generating fiber is made ultrafine, and then the polymer entangled body is impregnated and impregnated again.
- a method of directly gripping ultrafine fibers with a polymer elastic body impregnated see, for example, Patent Document 4.
- the elastic polymer body migrates or the fibers are easily gripped, so that the texture of the resulting artificial leather is impaired!
- the artificial leather obtained using the polymer elastic aqueous dispersion has not yet been sufficiently satisfied with both the fiber gripping property and the texture.
- Patent Document 1 Japanese Patent Publication No. 41-9315 (1-3 pages)
- Patent Document 2 JP-A-5-59615 (1-3 pages)
- Patent Document 3 Japanese Patent Publication No. 49-10633 (1-3 pages)
- Patent Document 4 JP2003-306878 (1-4 pages)
- the present invention provides an artificial leather obtained by using an aqueous polymer elastic dispersion and sufficiently satisfying both the fiber gripping property and the texture, and a method for producing the same.
- the present invention relates to an artificial leather comprising an entangled structure formed from an ultrafine fiber bundle and a polymer elastic body impregnated in the entangled structure. A part of the body is infiltrated into the ultrafine fiber bundle, and the penetration ratio of the polymer elastic body is an area ratio in an arbitrary cross section perpendicular to the length direction of the ultrafine fiber bundle. It relates to artificial leather in the range of 1 to 30%.
- the present invention further relates to a suede-like artificial leather produced by the artificial leather.
- the present invention further includes (1) a step of applying an aqueous dispersion of a polymer elastic body to the inside of a fiber entanglement formed from a composite fiber comprising a water-soluble polymer component and a poorly water-soluble polymer component;
- the present invention relates to a method for producing artificial leather including
- the ultrafine fiber bundle constituting the artificial leather of the present invention can be arbitrarily selected according to the use of the artificial leather and is not particularly limited. However, an ultrafine fiber bundle generated from the ultrafine fiber-generating fiber is preferred. In addition, from the viewpoint of improving the texture of the artificial leather and the surface appearance of the suede-like artificial leather, the fineness of each ultrafine fiber is preferably 0.0001-0.45 decitex. From the viewpoint of coloring property that is preferable to decitex and gripping property of the polymer elastic body, 0.002 to 0.4 decitex is particularly preferable. The fineness of the ultrafine fiber bundle is preferably 2 to 10 decitex, and more preferably 3 to 8 decitex. 10: It is preferable to contain L00 ultrafine fibers.
- the ultrafine fiber generating fiber is composed of a water-soluble polymer component and a poorly water-soluble polymer component.
- a polymer component structure ultrafine fibers can be generated without using an organic solvent, and the burden on the environment can be reduced.
- polymer elastic water dispersion together, a specific permeation structure into the ultrafine fiber bundle of the polymer elastic body described later can be obtained.
- water-soluble means that 10 g or more dissolves in 60 ° C water lOOg
- “poorly water-soluble” means that it is force-dissolvable up to 0.1 lg in 60 ° C water lOOg. It means not.
- the ultra-fine fiber-generating fiber includes at least one water-soluble polymer component, and at least one kind of extremely water-soluble polymer component that forms a very fine fiber.
- any of sea-island type fibers such as sea-island type mixed spun fibers and multicomponent composite fibers such as petal-type cross-sections and laminated fibers may be used.
- the component to be extracted and removed is a water-soluble polymer component that can be spun.
- known polymers that can be extracted and removed with water or an aqueous solution hereinafter sometimes referred to as an aqueous solvent
- Polyvinyl alcohol copolymers that can be dissolved in an aqueous solvent (hereinafter referred to as PVA) May be omitted).
- PVA polyvinyl alcohol copolymers that can be dissolved in an aqueous solvent
- the thermoplastic resin and polymer elastic body used for the ultrafine fiber component are not limited to specific types, and the environmental load is small.
- the PVA may be a homo PVA or a modified PVA having a copolymerized unit introduced! / ⁇ force From the viewpoint of melt spinnability, water solubility, fiber properties, and shrinkage characteristics during extraction processing, etc.
- a modified PVA is preferred.
- olefins having 4 or less carbon atoms such as ethylene, propylene, 1-butene, and isobutene; It is preferably derived from at least one compound selected from alkyl butyl ethers such as revinino reetenole and n-butyl vinyl ether.
- the copolymerized unit is preferably present in 1 to 20 mol% in the PVA.
- a modified PVA containing 4 to 15 mol% of ethylene units is more preferable because of high fiber properties.
- the saponification degree of the PVA is from 90 to 99.99 mole 0/0 force S Preferably, from 92 to 99.98 mole 0/0 laid more preferred, from 94 to 99.96 Monore 0/0 force more preferably, 95 99.95 Monore 0/0 force ⁇ particularly preferred.
- the saponification degree is 90 mol% or more, compound melt spinning can be performed without thermal decomposition or gelation with good thermal stability. PVA with a saponification degree greater than 99.99 mol% is difficult to produce stably.
- the poorly water-soluble polymer component is not particularly limited as long as it is a known resin capable of forming ultrafine fibers, for example, polymers such as polyamides, polyesters and polyolefins.
- polymers such as polyamides, polyesters and polyolefins.
- polyesters such as polyethylene terephthalate, polybutylene terephthalate, polyethylene terephthalate copolymerized with isophthalic acid or polybutylene terephthalate copolymerized with isophthalic acid, and polyamides such as nylon 6, nylon 11, and nylon 12 are preferred.
- PVA polyvinylene terephthalate
- the ultrafine fiber-generating fiber it is preferable from the viewpoint of spinning stability of the ultrafine fiber-generating fiber to select a poorly water-soluble polymer component having a melting point in the range of the melting point of the water-soluble polymer component to the melting point of the water-soluble polymer component + 60 ° C.
- the melting point of the water-soluble polymer component such as spinnability ⁇ ; force et 160 to 230 o C force S preferably ⁇ .
- the mass ratio of the water-soluble polymer component and the poorly water-soluble high polymer component constituting the ultrafine fiber generating fiber is preferably in the range of 10Z90 to 60Z40. Within the above range, the dispersion of the water-soluble polymer component and the poorly water-soluble polymer component in the cross section of the ultrafine fiber generation type fiber is good, so that the resulting ultrafine fiber and ultrafine fiber bundle are uniform, and the resulting artificial leather wind In this case, a suede-like artificial leather having a superior feeling and a uniform nap feeling can be obtained.
- the ultrafine fiber may contain a pigment.
- the poorly water-soluble polymer component includes a stabilizer such as a copper compound, a colorant, an ultraviolet absorber, a light stabilizer, an antioxidant, an antistatic agent, a flame retardant, and a plastic as long as the purpose and effect of the present invention are not impaired.
- An agent, a lubricant, and a crystallization rate retarder may be added during the polymerization reaction or in a subsequent step.
- inert fine particles such as silica, alumina, titanium oxide, calcium carbonate, and barium sulfate may be added. These may be used alone or in combination of two or more, and may improve spinnability and stretchability.
- the ultrafine fiber generating fiber is usually drawn 1.5 to 4 times. Stretching may be carried out after being spun off after discharging from the spinning nozzle, or may be carried out before scooping off. Stretching may be performed using hot air, hot plate, hot roller, water bath, etc., which is preferably performed under heating at 50 to 110 ° C.
- the water content of the water-soluble polymer component is preferably small, and it is preferably stretched with hot air.
- the ultrafine fiber generating fiber is a long fiber web or a staple by a spunbond method or the like. After shorting Louis, make short fiber web. For example, the ultra fine fiber generating fiber is crimped and then stapled, and is made into a web using a card, a cross wrapper, a random weber or the like. Long fiber webs or short fiber webs are entangled with one dollar punch. If necessary, needle punching may be performed after a woven or knitted fabric is laminated on the surface layer, lower layer or intermediate layer of the web. Needle punching is performed under conditions such that the needle pub penetrates to the web surface, preferably at a needle punch density of 400 to 5000 nonches / cm 2 , more preferably 1000 to 2000 nonches / cm 2 .
- the number of twists of the yarn constituting the woven or knitted fabric is preferably 10 to 650 TZm, more preferably 15 to 500 TZm, in order to obtain a structure integral with the web. If it is over OTZm, the single yarn of the woven or knitted fabric will be entangled with the ultrafine fiber generation type fiber, so that it is possible to prevent bad appearance due to large exposure of the damaged yarn to the fiber entangled surface. . When the number of twists is 650 TZm or less, the web and the woven or knitted fabric are united to obtain a structure.
- the basis weight of the woven or knitted fabric is preferably a force of 20 to 200 gZm 2 which is appropriately selected according to the purpose, and more preferably 30 to 150 gZm 2 .
- the fabric weight is S20gZm 2 or more, the shape retention of the woven or knitted fabric is good, and there is no occurrence of misalignment.
- the basis weight is 200 gZm 2 or less, the interval between the yarns constituting the woven or knitted fabric is moderate, the ultra fine fiber-generating fibers sufficiently penetrate the woven or knitted fabric, and the web and the woven or knitted fabric are highly entangled and separated and integrated. A web Z woven or knitted structure is obtained.
- the type of woven or knitted fabric is not particularly limited, and is based on weft knitting such as warp knitting and tricot knitting, lace knitting and various knittings based on these knitting structures, or plain woven, twill woven, satin weaving and woven knitting structures.
- Various types of woven fabrics can be used.
- tissue, a density, etc. are suitably selected according to the objective.
- the fiber entangled body When the obtained fiber entangled body is impregnated with the polymer elastic body solution and then dried, if the temperature is raised, the fiber entangled body may be greatly contracted. When contracted, the space inside the fiber entangled body decreases, and the polymer elastic body impregnated inside is extruded to the surface layer, and the uniform distribution of the molecular elastic body may be impaired. In order to avoid such inconvenience, it is preferable to heat shrink the fiber entangled body after the needle punch before impregnating the polymer elastic body solution. The heat shrink treatment is also preferable in order to increase the fiber density of the fiber entangled body and obtain a suede-like artificial leather having a fine napped appearance and a good texture. Improves smoothness of artificial leather surface In order to do so, heat press as necessary after heat shrinking.
- the resultant fiber-entangled body having a mass per unit area of the of the resulting artificial leather applications, but is preferably 300 to 1500 g / m 2.
- the apparent density 0. 20 ⁇ 0. 80g / cm 3 forces Preferably, 0. 25 ⁇ 0. 70g / cm 3 power ⁇ more preferred.
- the weight is 0.20 g / cm 3 or more, the mechanical properties of the suede-like artificial leather are good, and when the weight is 0.80 g / cm 3 or less, it is possible to prevent the texture from becoming hard.
- the thickness of the fiber entangled body is not particularly limited as long as it satisfies the weight range and density range.
- the polymer elastic body contained in the fiber entangled body in the present invention is known in the artificial leather field.
- a composition comprising at least one polymer polyol having an average molecular weight of 500 to 3000, at least one polyisocyanate and at least one low molecular weight compound having two or more active hydrogen atoms, Alternatively, various polyurethanes obtained by reacting in multiple stages can be mentioned.
- the polymer polyol is selected from polyester diol, polyether diol, polyether ester diol, polycarbonate diol and the like.
- the polyisocyanate is selected from aromatic, alicyclic and aliphatic diisocyanates such as 4,4'-diphenol-methane diisocyanate, isophorone diisocyanate and hexamethylene diisocyanate.
- a low molecular weight compound having two or more active hydrogen atoms may be selected from ethylene glycol, ethylene diamine and the like.
- Different types of polyurethane which may contain a mixture of different types of polyurethanes, may be contained in multiple portions.
- a polymer elastic body composition to which a polymer elastic body such as synthetic rubber, polyester elastomer, and talyl-based resin is added as necessary may be contained.
- a water-soluble polymer component such as PVA is used as one component of the ultrafine-generating fiber, it is necessary to impregnate an aqueous dispersion of a polymer elastic body.
- the water-soluble polymer component constituting the ultrafine fiber-generating fiber is dissolved in the water in the aqueous dispersion when the polymer elastic body is solidified and dried after impregnation into the fiber entangled body. A certain amount dissolves and the polymer elastic body penetrates from the outer periphery of the ultrafine fiber generating fiber into the inside thereof.
- the ultrafine fiber generating fiber is made ultrafine in a later step, a structure in which a part of the polymer elastic body is fixedly present in a specific range inside the ultrafine fiber bundle is obtained.
- a known technique such as a dip-dip method can be used. In some cases, the water-soluble polymer component is squeezed out and the aqueous polymer elastic dispersion is contaminated.
- the water dispersion of the polymer elastic body without requiring a large pressure is used. It is preferable to use a method capable of impregnating a predetermined amount only by controlling the supply amount and concentration of the liquid, for example, a method of impregnating with a lip coater or the like.
- the polymer elastic body is substantially discontinuously present inside the fiber entangled body after being fixed in terms of having both fiber gripping property and flexible texture by the polymer elastic body,
- the polymer elastic body acts as a binder for binding fibers.
- the polymer elastic body concentration in the aqueous dispersion is preferably 5 to 40% by mass.
- the fiber entangled body in which the polymer elastic body aqueous dispersion is applied is rapidly heated and heated, and at the same time, an infrared irradiation treatment is performed to partially dissolve the water-soluble polymer component.
- It is advantageous for increasing the temperature of the surface and the inside of the fiber entangled body has an infrared absorption wavelength of 2.6 m, and is very advantageous for increasing the temperature of an aqueous dispersion of a polymer elastic body.
- Infrared rays having a maximum energy wavelength of 2 to 6 m are preferably used from the viewpoint of good balance between absorption and transmission of infrared rays of the fiber entangled body provided with the molecular elastic body aqueous dispersion.
- the surface of the fiber entangled body is 10 ° C or more higher than the gel temperature of the polymer elastomer aqueous dispersion within one minute!
- the temperature preferably the gel temperature + 10 ° C to the gel temperature + 50 It is preferable to raise the temperature to ° C. If the surface temperature of the fiber entangled body is within the above range, the temperature inside the fiber entangled body has reached the gelling temperature of the polymer elastic body aqueous dispersion or higher, which promotes thermal gelation of the polymer elastic body.
- the time for raising the surface temperature of the fiber entangled body to be within the above-mentioned range is within 1 minute from the viewpoint that the polymer elastic water dispersion easily undergoes thermal gelation before causing migration.
- the polymer elastic water dispersion easily undergoes thermal gelation before causing migration.
- the polymer elastic body can be in direct contact with the poorly water-soluble polymer component, and part of the polymer elastic body is formed from the outer periphery of the ultrafine fiber bundle to the inside of the bundle over substantially the entire artificial leather obtained by ultrafine treatment. It is preferable that a structure having an area ratio of 1 to 30% is easily obtained.
- the surface temperature of the fiber entangled body After raising the surface temperature of the fiber entangled body by infrared irradiation, the surface temperature is maintained within the above range for 0.3 to 1.5 minutes, and during this time, the moisture content of the fiber entangled body is 50 mass% or less. Make it. If it exceeds 50% by mass, the water-soluble polymer component dissolves more than necessary at the time of subsequent heating and drying, and the proportion of the polymer elastic body directly contacting the poorly water-soluble polymer component increases, and migration tends to occur. Become. As a result, a structure in which the polymer elastic body permeates more than 30% of the fiber bundle by area ratio is obtained, and the texture of the artificial leather becomes hard.
- the lower limit of the moisture content is not particularly limited, but is preferably 10% or more in terms of drying efficiency. Since both surfaces of the fiber entangled body are heated evenly, it is preferable to irradiate infrared rays from both surfaces under the same conditions. Further, it is preferable to irradiate with infrared rays in a vertical type in order to uniformly evaporate moisture on both sides.
- the moisture content can be determined by the following equation.
- the infrared irradiation treatment After the infrared irradiation treatment, heat at 110 to 170 ° C for 1 to 10 minutes in order to evaporate water remaining in the fiber entangled body and to firmly fix the adhered polymer elastic body. Perform the drying process. When heat drying is not performed, the polymer elastic body swells and falls off due to the ultrafine fiber processing that extracts and removes the water-soluble polymer component and the hot water during the dyeing process, and the surface fiber is sufficiently covered with the polymer elastic body. Without being grasped, the appearance quality of the resulting suede-like artificial leather will be inferior.
- the heat drying method may be a known method such as hot air drying or wet heat drying.
- the heat drying treatment temperature and time are arbitrarily set according to the sticking characteristics of the polymer elastic body.
- a treatment liquid which is a non-solvent for a poorly water-soluble polymer component and a polymer elastic body and is a solvent for a water-soluble polymer component (extraction removal component), that is, water or an acidic or alkaline aqueous solution.
- the water-soluble polymer component is extracted and removed.
- the ultrafine fiber-generating fiber is converted into an ultrafine fiber bundle to obtain artificial leather.
- hot water extraction is preferred because of its low environmental impact.
- the temperature of hot water is preferably 60 to 100 ° C, more preferably 80 to 95 ° C. When the temperature is 60 ° C or higher, the extraction time can be shortened. Therefore, the hot water temperature is preferably as high as possible.
- the temperature is 100 ° C. or less, the fiber-holding property of the polymer elastic body, in which the attached polymer elastic body and the ultrafine fiber are hardly loosened, is maintained.
- a part of the polymer elastic body is permeated into the ultrafine fiber bundle in the obtained artificial leather.
- the amount of the high molecular weight material that has permeated is in the range of 1 to 30% in terms of area ratio.
- the suede-like artificial leather has a good appearance in which the ultrafine fiber bundle is firmly held by the polymer elastic body, the ultrafine fibers on the surface are not removed, and the ultrafine fibers on the surface are fibrillated. Is obtained. It is particularly preferred that a high molecular elastic body does not exist in the center of the ultrafine fiber bundle (within 80% from the center to the center of the surface length).
- the area ratio is less than 1%, the amount of the high molecular elastic body that penetrates into the ultrafine fiber bundle and directly contacts the ultrafine fiber is small. There is a tendency for feeling (waist) to decrease. Furthermore, since the amount of ultrafine fibers gripped by the polymer elastic body is small, the resulting suede-like artificial leather loses its appearance and immediately deteriorates in appearance quality. On the other hand, if it exceeds 30%, it is possible to prevent unplugging and improve the appearance quality, but since the amount of the elastic polymer directly in contact with the ultrafine fibers is too large, the texture is hardened. It is preferable that the polymer elastic body permeates in the length direction of the ultrafine fiber bundle not continuously but discontinuously. In any cross section perpendicular to the length direction of the ultrafine fiber bundle, it may penetrate in a discontinuous state or a partially continuous state.
- the area ratio that is, the ratio A (%) of the polymer elastic body penetrating into the ultrafine fiber bundle is represented by the following formula:
- Areas B and C were determined by an electron micrograph of an arbitrary cross section perpendicular to the length direction of the ultrafine fiber bundle.
- the cross section is defined as a region obtained by sequentially connecting the centers of a plurality of ultrafine fibers constituting the outer periphery of the ultrafine fiber bundle.
- the polymer elastic body preferably penetrates discontinuously in the range of 0.2 to 7 / ⁇ ⁇ on average from the outer periphery to the inner direction of the ultrafine fiber bundle.
- the discontinuous state refers to a state of being imparted in the form of dots characteristic to a water-dispersed polymer elastic body that is not continuous, such as when an organic solvent-based polymer elastic body is applied.
- part of the ultrafine fibers constituting the ultrafine fiber bundle existing in the vicinity of the boundary between the raised portion and the artificial leather is fixed by the polymer elastic body. Such sticking prevents the ultrafine fibers forming napped fibers from slipping out and has excellent surface properties.
- Suede-like artificial leather can be obtained. Since a part of the polymer elastic body permeates in the range of 1 to 30% by area ratio inside the ultrafine fiber bundle existing in the artificial leather of the present invention, sufficient fiber gripping property and texture are obtained. Have both. However, the napped portion may receive a large force such as a frictional force, and the fibers constituting the napped portion may be easily removed.
- the napped fiber is in synergy with the gripping effect of the internal ultrafine fiber. The removal of the material is prevented, and the surface properties are remarkably improved.
- the vicinity of the boundary between the raised portion and the artificial leather means the vicinity of the root of the ultrafine fiber constituting the raised portion of the suede-like artificial leather. As will be described later, it refers to the range in which a solution or dispersion of a polymer elastic material applied to the raised surface of suede-like artificial leather or the surface of artificial leather before raising is present. More specifically, the portion from the depth of 100 m from the surface of the artificial leather up to 100 ⁇ m above the base (surface of the artificial leather) force of the ultrafine fiber bundle that constitutes the napped portion.
- the environmental load is small! /, Because the water-dispersed polymer elastic material adheres discontinuously, and the ultra-fine fibers collected by raising the hair are easy to disperse. Since it is easy to disperse the collected ultrafine fibers, a polymer elastic body is applied as an aqueous dispersion to the raised surface of the suede-like artificial leather or the surface of the artificial leather before raising. Is preferred. After the application, a heat drying treatment (preferably a treatment at 130 to 160 ° C. for 2 to 10 minutes) is performed to firmly fix the polymer elastic body to the ultrafine fibers in the vicinity of the boundary.
- a heat drying treatment preferably a treatment at 130 to 160 ° C. for 2 to 10 minutes
- the polymer elastic body it is preferable to use the same or the same type of polymer elastic body as the polymer elastic body impregnated in artificial leather. As long as the effects of the present invention are not impaired, a known polymer elastic body can be used.
- the polymer elastic body includes water-soluble agents such as penetrants, antifoaming agents, thickeners, extenders, curing accelerators, antioxidants, ultraviolet absorbers, fluorescent agents, antifungal agents, polyvinyl alcohol, and carboxymethylcellulose. Functional polymer compounds, dyes, pigments and the like may be added as appropriate.
- the polymer elastic body concentration in the aqueous dispersion is preferably 5 to 40% by mass.
- the polymer elastic body aqueous dispersion may be applied to the artificial leather surface at any stage as long as it is after ultrafine fiber formation. For example, it may be any of immediately after the formation of ultrafine fibers, after the raising treatment, and after dyeing. Applying an elastic polymer dispersion in water, drying by heating, and raising treatment It is more preferable that the polymer elastic body is selectively fixed to the vicinity of the boundary between the raised portion and the artificial leather.
- the polymer elastic water dispersion can be applied by a known method such as a dip-pipe method, a gravure method and a spray method.
- the gravure method is particularly preferred because the polymer elastic body is fixed only in the vicinity of the boundary between the napped portion and the artificial leather, and the polymer elastic body is immediately applied in a discontinuous state to obtain an excellent texture and surface touch.
- the amount of the high-molecular elastic body to be applied can be appropriately selected according to the use and necessary function, but it is preferably applied to the vicinity of the boundary in the range of 0.5 to 7% by mass with respect to the artificial leather. When the content is 5% by mass or more, the bonding effect of the ultrafine fibers existing in the vicinity of the boundary can be obtained, and when the content is 7% by mass or less, the amount of the elastic polymer existing in the vicinity of the boundary is small. Appropriate and provides excellent appearance and surface touch.
- a desired thickness is obtained by pressure heating treatment or division treatment as necessary.
- at least one surface of the artificial leather is subjected to raising treatment such as buffing to form an ultrafine fiber raised surface mainly composed of ultrafine fibers to obtain a suede-like artificial leather.
- the thickness may be adjusted by puffing before or after the ultrafine fiber generating fiber is made ultrafine.
- the surface raising treatment is preferably performed after applying a polymer elastic water dispersion to the surface of the artificial leather, drying, and fixing a part of the ultrafine fibers constituting the ultrafine fiber bundle in the vicinity of the boundary. .
- the surface of the artificial leather may be melted by heating and pressing the surface to form a resin layer.
- the resin to be applied to the surface known polymer elastic bodies represented by polyurethane and acrylic are preferably used.
- the resin layer may be colored with a very small amount of dye or a small amount of pigment.
- the artificial leather of the present invention is used as an upper layer, and the woven or knitted fabric is bonded to become the lower layer, or the suede-like artificial leather of the present invention is used as an upper layer, and the suede-like artificial leather is used.
- Composing leather A layer having a fiber strength different from that of the fibers may be bonded to form a lower layer.
- Isophthalic acid 10 mol 0/0 copolymerized polyethylene terephthalate (melting point 234 ° C) and the island component, of ethylene units contained 10 mol%, saponification degree 98.4 mol%, the melting point 210 ° C polyvinyl - alcohol copolymer A polymer (Exeval, manufactured by Kuraray Co., Ltd.) was used as a sea component, and 64 islands of sea island fiber with sea component / island component 30/70 (mass ratio) were composite-spun. This was drawn to obtain an ultrafine fiber generating fiber having a single yarn fineness of 5.5 dtex, an island fiber of 0.026 dex, and a density of 1.27 gZcm 3 . The fiber was crimped, cut to 51 mm, and carded to create a short fiber web.
- sodium sulfate decahydrate was added to ether-based polyurethane water dispersion emulsion (Evafanol AP-12, manufactured by Nikka Chemical Co., Ltd.), diluted with water, and sodium sulfate decahydrate Z emulsion.
- the solid content was adjusted to 3 parts to obtain a polymer elastic water dispersion having a concentration of 14% by mass and a density of 1.02 g / cm 3 .
- the thermal gelation temperature of this polymer elastic water dispersion was 60 ° C.
- the high molecular weight elastic water dispersion artificial leather + woven / knitted fiber
- Z polymer elastic body 80Z20 (mass ratio) Impregnated.
- infrared rays with a maximum energy wavelength of 2.6 ⁇ m were irradiated at 97 V for 60 seconds, and the fiber entangled surface temperature was raised to 100 ° C. within 1 minute.
- the moisture content after 60 seconds of infrared irradiation was 30%.
- the resulting artificial leather had a good appearance with no wrinkles or elongation, a uniform leather-like texture, and excellent physical properties.
- Example 3 The same operation as in Example 1 was performed, except that infrared irradiation was performed at 97 V for 90 seconds, and the moisture content after 90 seconds of irradiation was changed to 20%.
- the polymer elastic body penetrated 2% by area ratio into the ultrafine fiber bundle.
- a suede-like artificial leather having no creases, wrinkles, etc., having a soft and very soft texture, uniform fluff length, and good appearance.
- the chair seat produced using the suede tone leather had little fluff.
- Example 2 The same operation as in Example 1 was performed except that the surface of the fiber entangled body was raised to 90 ° C. within 1 minute by infrared irradiation at 80 V for 60 seconds.
- the polymer elastic body penetrated into the ultrafine fiber bundle by 3.5% in area ratio.
- the obtained artificial leather was free from creases, wrinkles and the like, had a very soft texture, and had a strong grip on the fibers.
- the suede-like artificial leather obtained from the artificial leather had a uniform fluff length and a good appearance. Moreover, the chair seat produced using the suede-like artificial leather had little fluff.
- Example 2 The same operation as in Example 1 was performed except that nylon was used as the island component of the ultrafine fiber.
- the polymer elastic body penetrated 3% by area ratio in the ultrafine fiber bundle.
- a suede-like artificial leather was obtained that had no creases, wrinkles, etc., was soft and very soft, had a uniform fluff length, and had a good appearance.
- Example 2 The same treatment as in Example 1 was performed, except that polyethylene was used as the sea component of the ultrafine-generating fiber, and the area shrinkage was performed by hot water shrinkage, and the polyethylene was extracted and removed with toluene to obtain ultrafine fibers.
- a cross section perpendicular to the length direction of the ultrafine fiber bundle was confirmed with an electron microscope, a gap existed between the polymer elastic body and the outer periphery of the fiber bundle, and the polymer elastic body penetrated into the fiber bundle. I helped.
- the ultrafine fiber bundle is not sufficiently grasped by the polymer elastic body, and the obtained suede-like artificial leather has a poor appearance quality due to its outstanding napped fibers, irregular fluff lengths, and the like. there were.
- the chair seat prepared using the suede-like artificial leather V had a lot of fluff.
- Comparative Example 3 The same treatment as in Example 1 was performed except that infrared irradiation was performed at 30 V for 60 seconds. The moisture content after infrared irradiation was 60%. Since the polymer elastic body migrated to the surface layer, the surface layer fiber of the obtained suede-like artificial leather was covered with rosin, and the fluffy feeling was very inferior. In addition, the polymer elastic body penetrated 35% by area ratio in the ultrafine fiber bundle near the surface layer of the suede-like artificial leather. As a result, the suede-like artificial leather was broken and the texture was hard and inferior.
- Polymer elastic body water After impregnation with water, it was dried by heating in a hot air dryer for 10 minutes to completely evaporate the water, and the polymer elastic body was cured and fixed to the fiber entangled body. Thereafter, the polyvinyl alcohol copolymer component was extracted with hot water at 90 ° C to form ultrafine fibers.
- the suede-like artificial leather obtained from the artificial leather has a uniform raised appearance with the fluffing of the surface fibers suppressed without impairing the texture.
- the suede-like artificial leather of the present invention is used for manufacturing chair seats, blousons, clothing such as clothing, shoes, bags and the like represented by various gloves.
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Dispersion Chemistry (AREA)
- Synthetic Leather, Interior Materials Or Flexible Sheet Materials (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP07737436.1A EP2006439B1 (en) | 2006-02-28 | 2007-02-27 | Artificial leather and method for producing the same |
JP2008502797A JPWO2007099951A1 (ja) | 2006-02-28 | 2007-02-27 | 人工皮革およびその製造方法 |
US12/281,026 US20090047476A1 (en) | 2006-02-28 | 2007-02-27 | Artificial leather and method for producing the same |
Applications Claiming Priority (4)
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---|---|---|---|
JP2006-052404 | 2006-02-28 | ||
JP2006052404 | 2006-02-28 | ||
JP2006-090917 | 2006-03-29 | ||
JP2006090917 | 2006-03-29 |
Publications (1)
Publication Number | Publication Date |
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WO2007099951A1 true WO2007099951A1 (ja) | 2007-09-07 |
Family
ID=38459056
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2007/053634 WO2007099951A1 (ja) | 2006-02-28 | 2007-02-27 | 人工皮革およびその製造方法 |
Country Status (6)
Country | Link |
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US (1) | US20090047476A1 (ja) |
EP (1) | EP2006439B1 (ja) |
JP (1) | JPWO2007099951A1 (ja) |
KR (1) | KR20080106527A (ja) |
TW (1) | TW200738933A (ja) |
WO (1) | WO2007099951A1 (ja) |
Cited By (5)
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CN100342095C (zh) * | 2004-06-18 | 2007-10-10 | 上海市建筑科学研究院有限公司 | 粘贴纤维布加固空间混凝土梁柱节点的构造 |
JP2011074541A (ja) * | 2009-09-30 | 2011-04-14 | Kuraray Co Ltd | 耐ピリング性の良好な立毛調人工皮革 |
JP2014005564A (ja) * | 2012-06-22 | 2014-01-16 | Kuraray Co Ltd | 銀付調人工皮革及びその製造方法 |
WO2014097999A1 (ja) * | 2012-12-18 | 2014-06-26 | 共和レザー株式会社 | 積層シート及びその製造方法 |
JP2018123444A (ja) * | 2017-01-31 | 2018-08-09 | 東レ株式会社 | シート状物 |
Families Citing this family (6)
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WO2008026653A1 (fr) | 2006-08-31 | 2008-03-06 | Kuraray Co., Ltd. | Feuille de type cuir ignifuge et son procédé de production |
EP2597193B1 (en) | 2011-11-24 | 2014-01-15 | Jade Long John Enterprise Co., Ltd | Method for manufacturing fabrics with artificial leather textile feeling |
KR102436001B1 (ko) * | 2016-03-30 | 2022-08-23 | 코오롱인더스트리 주식회사 | 외관 품질이 향상된 인공피혁 및 이의 제조방법 |
WO2019159728A1 (ja) * | 2018-02-19 | 2019-08-22 | 株式会社クラレ | 立毛調人工皮革 |
KR102027323B1 (ko) * | 2018-09-18 | 2019-10-01 | 조맹상 | 수성 방오처리된 폴리우레탄 인조피혁의 제조방법 |
WO2020129741A1 (ja) * | 2018-12-21 | 2020-06-25 | 株式会社クラレ | 立毛人工皮革及びその製造方法 |
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Also Published As
Publication number | Publication date |
---|---|
EP2006439A4 (en) | 2012-08-08 |
KR20080106527A (ko) | 2008-12-08 |
JPWO2007099951A1 (ja) | 2009-07-16 |
EP2006439B1 (en) | 2013-07-17 |
US20090047476A1 (en) | 2009-02-19 |
EP2006439A2 (en) | 2008-12-24 |
EP2006439A9 (en) | 2009-04-08 |
TW200738933A (en) | 2007-10-16 |
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