TW589427B - Pull-up ultra-fine fiber artificial leather and method for producing the same - Google Patents

Abstract

A pull-up ultra-fine fiber artificial leather includes a substrate, a polyurethane (PU) layer on the substrate, and a wax layer on the PU layer. The present invention also provides a method for producing a pull-up artificial leather.

Description

589427

V. Description of the invention (l) [Technical field to which the invention belongs] The Ming system relates to a kind of ultra-fine fiber artificial leather and a method for manufacturing the same, and particularly relates to a kind of ultra-fine fiber artificial jade leather with pull-up discoloration and a method for manufacturing the same 0 technology】

There is a type of pun-up leather in the leather mouth where the surface changes color when pulled. According to a conventional technique, the pull-up discolored leather is manufactured by the following steps. First, the base material of the m-fiber non-woven fabric or woven fabric is impregnated with a polyurethane (polyurethane, ρϋ) coating, and then the impregnated base material is subjected to solidification, washing, and drying to obtain a synthetic leather semi-finished product. In addition, after a layer of textured paper is coated with a color-changing paint containing PU resin, wax, and coloring material to form a surface layer, a subsequent layer of adhesive is applied to the surface layer. Finally, the surface layer is adhered to the semi-finished product with the adhesive used subsequently. After tearing off the release paper ', a synthetic leather as shown in Fig. 1 was obtained. The synthetic leather 100 includes a semi-finished synthetic leather product 102 and a surface layer 104 capable of being pulled up and discolored, and is disposed on the semi-finished synthetic leather product 1Q2. The advantage of pull-up discolored leather is that the texture and vibrancy of the leather can be shown by the irregular color layers on the surface. However, although the artificial leather obtained according to the aforementioned conventional method can produce a layered sense of color by pulling, once the surface is changed by pulling up, it is difficult to return to the original color. In addition, when custom-made pull-up discolored leather is made into a product, it is very easy to produce difficult-to-recover marks (such as wrinkles or scratches) due to accidental external force. These marks often need to be heated by hot air for more than several minutes It may be restored. The aforementioned synthetic leather has another deficiency

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Case No. 921023M V. Description of the Invention (2) ^ 'is the surface and fresh plate. [Summary of the Invention] The purpose of the present invention is to superfine fiber artificially, and another color of the present invention is to change the color. To achieve the above ultrafine fiber artificial leather (PU) layer, the thickness of the base layer is preferably the wax layer. Paraffin wax or liquid paraffin artificial leather may be additionally coated with a fat layer based on a resin (casein), polyurethane, and the weight percentage of the polyurethane. The present invention also provides the following steps. First of all, the composition of polyurethane and drying, the shape becomes damaged and ironed. The surface can also be coated with a layer of cloth and a layer of resin to correct the dullness of the surface, which is not as shiny as the surface of the leather, and provides a pull-up leather that can easily restore the original appearance. The objective is to provide a fine-fibre artificial leather with dermis luster and natural appearance. And other purposes, the present invention provides a pull-up discoloration leather comprising a microfiber substrate, a polyurethane material, and a wax layer provided on the polyurethane layer. The substrate ranges from about 0.1 mm to about 3 mm. In the range. Butterfly or ring-burning oil, ethylene synthesis, solid formation. The pull-up discoloration ultra-fine fiber provided by the present invention includes a surface resin layer provided on the wax layer. The surface tree composition is formed, and the resin composition includes casein ester resin and / or acrylic resin. Preferably, the emulsion resin and the acrylic resin in the resin composition are about 1 to 15%, about 10 to 30%, and about 0 to 10%. A method for manufacturing pull-up discolored leather, which mainly comprises coating a layer of coating on the surface of the ultra-fine fiber substrate, and solidifying and washing the coated substrate with the polyurethane semi-finished product. Then, the wax layer is flattened on the polyurethane layer. After that, it can be re-coated on the pier layer, and the surface of the surface resin and the polyurethane layer is embossed at a high temperature to make the surface

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Page 6 589427 ^ S_92102353 Month, said, Amendment 5. Description of the invention (3) With natural texture, and then coating a layer of wax on the surface of the polyurethane layer. In the coating layer coating step, the polyurethane layer can be coated by spray coating, printing coating or reverse roll coating. Preferably, under a 100% stress test, the resin composition suitable for this method contains lactoferrin, polyurethane resin, and acrylic resin respectively at 80-1 50 Kg / cm2 '6 0-1 3 0 Kg / cm2 and 23 0-270 Kg / cm2. According to the present invention, even if a wrinkle or a scratch is generated due to inadvertent external force after the product is made into a product, the wrinkled or scratched part can be restored to its original state by rubbing for a few tens of seconds. In addition, the pull-up discoloration leather according to the present invention has a natural luster and a bright color. [Embodiment] The pull-up discoloration artificial leather of the present invention will be described below with reference to FIG. 2. The pull-up discoloration artificial leather 200 includes a substrate 202, a polyurethane layer 204, a wax layer 206, and a surface resin layer 208. The substrate 2 0 2 is preferably made of ultra-fine fibers (fiber fineness of about 0.5 denier to about 0. 0 01 denier) base cloth impregnated with a polyurethane coating, and then solidified, washed, and dried. Dry and weight reduction artificial leather substrate. The base cloth can also be an artificial leather substrate obtained by steps such as weight reduction, and then impregnated with a polyurethane coating, followed by coagulation, washing, and drying. The thickness of the substrate is preferably in a range of about 0.1 mm to about 3 mm. Referring to FIG. 1, the conventional pull-up discoloration synthetic leather 100 has only one surface layer 104 mixed with a polyurethane resin and a color-changing material on the substrate 102, not only the color is not bright enough, and the surface is not glossy. And once the pull-up is discolored or wrinkles or scars are accidentally caused by external force, it is difficult to return to 4 degrees. Refer to the figure, “$ 2 figure” and the pull-up discoloration ultrafine fiber artificial 06040.ptc of the present invention. Page 7 589427--~ 92102353--Year ______ Amended V. Invention Outline " ------- Leather 20 0 On the substrate 202 is a layer of vinegar 204 which provides leather texture and color. There is also a layer of wax layer 206 which contributes to the effect of pull-up and discoloration, and a layer of surface tree layer 208 which gives the artificial leather a dermis-like luster. The pull-up discoloration leather with this structure not only has sky iron luster and bright colors, but also the place where the color changes due to the pull-up can easily return to the original color by friction. In addition, according to the present invention: even if the wrinkled or scratched area is produced by the product after being made into a product, the wrinkled or scratched area may be rubbed for tens of seconds even if it is accidentally exposed to external forces. Restore. According to an embodiment of the present invention, the wax layer 206 is formed of a paraffin or naphthenic oil, an ethylene synthetic wax, a solid wax or a liquid paraffin. The surface resin layer 208 is formed of a resin composition. The so-called tree month composition in the present invention contains casein (ca s e i η), a polyurethane resin, and / or an acrylic resin. The urethane resin and / or the acrylic resin used in the present invention are preferably water-soluble or water-dispersible resins. Optimally, the weight percentages of the casein, the polyurethane resin, and the acrylic resin in the resin composition are about 1 to 15%, about 10 to 30%, and about 0 to 10%, respectively. . In addition, under a 100% stress test, the resin composition suitable for this method contains lactin which is preferably 80 kg / cm2 to 150 kg / cm2. When casein is less than 80 kg / cm2, the surface brightness of the artificial leather may be insufficient; when casein is greater than 150 kg / cm2, the surface of the artificial leather may be easily cracked. Under the 100% stress test, the polyurethane resin and the acrylic resin suitable for the present invention are preferably about 60 kg / cm2 to about 130 kg / cm2 and about 230 kg / cm2 to about 270 kg / cm2. The so-called 100% stress test system includes the following steps. First, apply the material to be tested on a release paper (coating

00640.ptc Page 8 589427 —-m 92102353_k month a 〇 5. Description of the invention quot " — " ^ -----

After thickness GAP = 0.2mm), move it into an oven and bake it at 60t for eight minutes, then bake it at 12 (TC for 30 minutes, and then let it stand at room temperature for 24 hours: then 'Cut out after baking A length of 10 Cffl and a width of 1 cm are used as test pieces. The thickness of the test piece is measured first, and then the test piece is placed in a tensile tester (the distance between the upper and lower clamps is 2 cm) for testing. The fracture strength of the test piece is measured, and the fracture strength is Production is divided by 2cm and then multiplied by 100% to obtain the resin's elongation (100%). After iron X, the elongation (100%) (in Kg) is divided by (thickness of the test piece multiplied by 1 cm) That is, a stress test result of 100% is obtained. It should also be noted that, in the pull-up discoloration artificial leather provided by the present invention, although the surface resin layer 208 can make the artificial leather have a leather-like glossiness, However, without the surface resin layer 2008, artificial leather made of other structures already has the effect of pull-up discoloration and can restore the original color through friction. Therefore, in the pull-up color-change artificial leather provided by the present invention, the surface resin layer 2 0 8 is a non-essential structure. The present invention also provides a pull-up discoloration leather The manufacturing method has the following main steps. First, a layer of a coating polyurethane composition having a thickness of about 0.1 mm to about 0.5 mm is coated on the surface of the ultrafine fiber substrate, and The substrate is solidified, washed, and dried to make the polyurethane layer formed elastic. Also, the surface of the polyurethane layer is treated, and the surface of the polyurethane layer has natural grains (such as pores) by using an embossing step, which appears similar to The quality of the genuine leather is coated with a layer of wax with a thickness of about 2 to about 6 'on the surface of the polyurethane layer, and the wax layer is flattened at a temperature of about 2 0 卞 -3 2 0 T. After that,

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On the soil layer ', and the surface resin layer was ironed at a temperature of about 220 ° -3 ° C to obtain a pull-up discolored artificial leather. Correction, and in addition, in the wax coating step, fibers can be coated on the polyurethane layer by spray coating, printing coating, or reverse / bend coating. The following examples are intended to illustrate the present invention in more detail and are not intended to limit the present invention. Example 1 A spear | island was made of a sea-island type ultra-fine fiber having an island composition of Nyion 6 (BASF) and a non-woven fabric. Impregnate the non-woven fabric with impregnated polyurethane coating (containing a polyurethane composition with a weight ratio of • 60 and dimethyl ammonium amine (DMF)), wash it at 90 ° C, and wash it at 140 ° C dry. Then, the sea component of the sea-island type microfiber is removed in a minus 1 process, so that the treated non-woven fabric forms a microfiber artificial leather substrate. After dyeing, the artificial leather substrate is a 35% polyurethane colored material composition, such as solidification, washing, drying and other processes, thereby grinding and coating the artificial leather substrate with a weight percent solution of polyurethane. The coated substrate is formed on the substrate to form a polyurethane layer. First, the polyurethane layer is embossed with a wheel engraved with a cowhide pattern, and then, a synthetic baking mouth coating of 5 mpa.s at room temperature is used. A shape of 3: 3 :: thick film was formed on the polyurethane layer, and the film was ironed with 260 T. Then the resin composition: 嗔 coated on the 蠛 layer to form a 2.5 ㈣ thick film, and Li · 〇τ after the surface resin ironed 1 can be obtained with a natural texture, pull-up discoloration effect = after rubbing can Recycled microfiber artificial leather. The rhenium composition is a lactone composition, a polyurethane resin composition, and an acrylic composition with a weight ratio of 1 00:80:20, respectively.

V. Description of the invention (7) The solid content of casein in the composition is 4%, the solid content of polyurethane resin in the polyurethane resin composition is 38%, and the solid content of the acrylic resin composition is 4 1%, and under 100% stress test, the casein, polyurethane resin and acrylic resin were 100Kg / cm2, 50Kg / cm2, and 25Kg / cm2 respectively. Example 2 A non-woven fabric was prepared by using a sea-island type ultrafine fiber having an island composition of nylon 6 (Nylon 6, BASF). The non-woven fabric was impregnated with a polyurethane coating for impregnation (containing a weight ratio of 40:60 polyurethane composition and dimethylformamide (DMF)). The impregnated non-woven fabric was washed with 90 t of water and dried at 140 ° C. Then, the sea component of the sea-island type microfiber is removed by a reduction process, so that the treated non-woven fabric forms a microfiber artificial leather substrate. On this artificial leather substrate, a polyurethane S pigment solution with a weight percentage of 35% was applied. The coated substrate is subjected to processes such as coagulation, washing, and drying to form a polyurethane layer on the substrate. The artificial leather substrate was dyed with an acid dye (Lanacron Brown SGR) 5% owf at a constant temperature of 90 ° C for 40 minutes, and then washed with water to obtain a colored artificial leather semi-finished product. First, the polyurethane layer was embossed with a wheel engraved with a cowhide texture. Then, a synthetic ethylene wax having a viscosity of 5 mpa · s at room temperature was sprayed on the polyurethane layer to form a 3 / z m thick film. The wax film was ironed with 2 60 T, and then the resin composition (which is a casein composition, a polyurethane resin composition, and an acrylic composition with a weight ratio of 100: 80: 20, respectively) Configured, wherein the casein solids content of the casein composition is 14%, the polyurethane resin solids content is 38%, and the acrylic resin composition is acrylic

00640.ptc Page 11 589427--Yu 02353____ year, month, day, five, invention description (8) ~---The resin solid content is 41%, under the stress test, and the casein, Polyurethane resin and acrylic resin were 100Kg / cm2, 50Kg / cm2, and 25.0 Kg / cm2, and sprayed on the wax layer to form a 2.5-thick film. After the surface resin film is ironed, an ultra-fine fiber artificial leather with natural texture, pull-up discoloration effect, and color can be recovered after rubbing can be obtained. Example 3 A sea-island type ultra-fine fiber with an island composition of nylon 6 (BALON) was used to make a fabric. Then, the sea component of the sea-island type microfiber is removed by a reduction process, so that the treated fabric forms a microfiber substrate. The ultra-fine fiber substrate was impregnated with a polyurethane coating for impregnation (containing a weight ratio of 40:60 polyurethane composition and dimethylformamide (DMF)). The impregnated ultrafine fiber substrate was coated with a polyurethane colorant composition solution having a weight percentage of 35%. After the ultra-fine fiber substrate is coagulated, it is 90%. 〇 Wash with water and dry at 40 ° C. Forms a microfiber artificial leather substrate. _ First embossed the polyurethane layer of the microfiber artificial leather substrate with wheels engraved with cowhide texture, and then sprayed a synthetic ethylene wax with a viscosity of 5mpa · s at room temperature to form a 3 # m thick polyurethane layer. The wax film was flattened at 26 ° C. Then spray the resin composition on the wax layer to form a 2 · 5 mouth thick film, and use 280 T to iron the surface resin to obtain a natural texture, pull-up discoloration effect, and rubbing. Recycled microfiber artificial leather. Comparative Example 1 Impregnated with a polyurethane coating for impregnation (containing a weight ratio of 40:60 polyurethane composition and dimethylformamide (MF)).

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After the impregnated non-woven fabric is solidified, it is washed at 90 ° C with water and dried at 140 ° C to form a synthetic leather substrate. Apply a liquid polyurethane color-changing coating on the textured release paper, where the one-liquid polyurethane color-changing coating includes a polyurethane resin (Tai Jing Co., Ltd.) and a color changing material (Qing Feng Fat Co., Ltd.). The coating was dried at 20 ° C to form a surface layer, and then a two-liquid type polyurethane coating was applied to the surface layer as an adhesive layer, and the surface layer was pasted onto the synthetic leather substrate. After the subsequent layer is hardened, the release paper is torn off to obtain a textured synthetic leather that can be pulled up and discolored. Comparative Example 2 A fabric was impregnated with a polyurethane coating for impregnation (containing a polyurethane resin in a weight ratio of 40:60 and dimethylformamide (DMF)). The impregnated fabric was coagulated, washed with water at 90 ° C, and dried at 140 ° C. Forming a synthetic leather base material 0 A polyurethane color-changing coating is coated on the synthetic leather base material, wherein the polyurethane color-changing coating comprises a polyurethane resin (Tai Jing Co., Ltd.) and ^ color (Lai Qing) Co., Ltd. The coating is then buffed and a pull-up discolorable synthetic leather is formed. The microfiber artificial leathers obtained in Examples 1 and 2 of the present invention were compared with the synthetic leathers obtained in Comparative Examples 1 and 2, and the results are shown in the following table.

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__Case No. 92102353_ Year 5. Description of the invention (10) As can be seen from Table 1, the pull-up discoloration microfiber artificial leather prepared according to the embodiments 1, 2 and 3 of the present invention has The leather luster, natural discoloration, discoloration recovery, and bright color that the top pull discoloration synthetic leathers obtained in 1 and 2 do not have. Although the present invention has been disclosed in the application of the present invention with reference to the details of the preferred embodiment of the invention, it can be understood that the disclosure is by way of illustration and not limitation. Any person skilled in the art will not depart from the spirit and To the extent changes are foreshadowed. Therefore, the scope of protection of the present invention shall be determined by the scope of the attached patent application. /

589427 _Case No. 92102353_ 年月 日 __ Brief Description of Drawings [Simplified Description of Drawings] Figure 1 · A conventional cross-sectional view of a pull-up discoloration synthetic leather; and Figure 2: A pull-up according to an embodiment of the present invention Discolored microfiber artificial leather cross-section view. ❿ Description of drawing number: 100 synthetic leather 102 semi-finished synthetic leather 104 surface layer 200 microfiber artificial leather 202 microfiber substrate 204 polyurethane layer 206 躐 layer 208 surface resin layer

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Claims (1)

589427 Case No. 92102353 Amendment 5. Application patent scope 1. A pull-up ultra-fine fiber artificial leather, comprising: a ultra-fine fiber substrate; a polyurethane layer formed on the front surface of the substrate And a layer is formed on the polyurethane layer. 2, according to the scope of the patent application of the first pull-up discoloration of ultra-fine fiber artificial leather, wherein the thickness of the ultra-fine fiber substrate is 1mm to 3mm, the fiber fineness of the ultra-fine fiber is 0.5 denier to 0 . 0 0 0 1 Danny. 3. According to item 1 of the scope of the patent application, the color-changing ultra-fine fiber artificial leather is formed, wherein the wax layer is formed of a wax, and the wax is a paraffin oil agent, a naphthenic oil agent, an ethylene synthetic wax, and a solid. Those selected from the group consisting of wax and liquid paraffin. 4. According to item 1 of the scope of the patent application, a pull-up discoloration microfiber artificial leather, further comprising a surface wax layer formed on the concrete layer. 5. The pull-up discoloration microfiber artificial leather according to item 4 of the scope of the patent application, wherein the surface resin layer is formed of a resin composition, and the resin composition includes lactin (c a s e i η) and a polyurethane resin. 6. According to item 5 of the scope of the patent application, the discoloration superfine fiber artificial leather is made, wherein the weight percentage of the casein in the resin composition is 1- 00640.ptc Page 16 589427 Case No. 92102353 Amendment 6. The scope of patent application is 15% and the weight percentage of the polyurethane resin in the resin composition is 10-30%. 7. According to item 5 of the scope of the patent application, the pull-up discoloration ultra-fine fiber artificial leather, in which the casein in the resin composition under a 100% stress test is 80 Kg / cm2 to 150 Kg / cm2 〇8, According to item 5 of the scope of patent application, the color-changing microfiber artificial leather is 60 Kg / cm2 to 130 Kg / cm2 in polyurethane resin in the resin composition under a 100% stress test. 9. The pull-up discoloration microfiber artificial leather according to item 5 of the scope of the patent application, wherein the resin composition further comprises acrylic resin. 10. The color-changing ultra-fine fiber artificial leather according to item 9 of the scope of the patent application, wherein the weight percentage of the casein in the resin composition is 1 to 15%; the polyurethane resin in the resin composition is The weight percentage is 10-30%; and the weight percentage of the acrylic resin in the resin composition is 1-10%. 11. According to item 9 of the scope of the patent application, the pull-up discoloration ultra-fine fiber artificial leather, wherein the acrylic resin in the resin composition under a stress test of 100 ° / ◦ is 230 Kg / cm2 to 270 Kg / cm2 . 00640.ptc page 17 589427 _ case number 92102353_ year month__ VI. Application for patent scope 1 2. A method for manufacturing pull-up discoloration superfine fiber artificial leather, including the use of S-polyamine coated with materials Cloth coating, cloth coating material, slender base: super one step in the lower layer of wax-forming with wax layer 1 and cloth with coating, I layer by layer Tu Weizhi fiber _. Fine 5, wax super LO. Color dmm: ¾ change lm6 pull 0. The highest degree is C /-The thickness of the item is 12 cloth degrees. The thickness of the thick coating system is the best in the range. According to the production of coated esters and ammonia, the 13th Polyurethane polymer has exceeded the scope of this model, and the French party is requested to make the roots of the Guar 4 leather 3Π1 1 1 0 0 dimensional fiber is a fine-dimensional fiber The dimensional slenderness exceeds the leather worker Π β ^ 1 β 1 ο fiber 000 is 0. The fineness is 0. The ultra-darkness to the color and thickness of the changeable danla material 5 The upper base to the nedan leather cloth is painted and applied to the ultra-fine color after the dimensionality is reduced. The layered ester-laminated item is formed into a 12-shaped form, which is included in Fan Baoli. It is requested that the French and French parties have a surface table based on the 15 leather that is made, which should make the step pattern press on the surface layer. Said S ammonia poly pair. , Road before the nature of the wax days, skin printing ,. In the case of applying polyester spray-line ammonia super poly-color for fiber spray coating, the coated layer of butterfly wax that changes on Labu cloth will cover Fanzhong cloth # 1, which is enclosed in a 12-form square. The application method was applied by the application party to fabricate or make cloth according to the requirements. The 16-skin leather superb color-changing pull-up item was pulled by the item 2 rH. 00640.ptc Page 18 589427 Manufacturing method of leather 'wherein the series is selected from the group consisting of paraffin oils, naphthenic oils, synthetic baking waxes, solid waxes and liquid paraffins. The manufacturing method of the discolored ultra-fine fiber human leather further includes coating a resin composition on the wax layer to form a surface resin layer. 19. The manufacturing method of the pull-up discoloration ultra-fine fiber artificial leather according to item 18 of the scope of the patent application, wherein the surface resin composition is applied with a thickness of #fll to 5 / im. 20. The method for manufacturing a pull-up discoloration ultra-fine fiber artificial leather according to item 18 of the scope of the patent application, wherein the surface resin layer composition comprises casein (c a s e i η) and a polyurethane resin. 2 1. The manufacturing method of pull-up discoloration superfine fiber artificial leather according to item 20 of the scope of the patent application, wherein the weight percentage of the casein in the resin composition is 1 to 15% and the polyurethane resin in the resin The weight percentage in the composition is 10-30%. 2 2. The manufacturing method of pull-up discoloration ultra-fine fiber artificial leather according to item 20 of the scope of the patent application, wherein the lactolin in the resin composition is 80 Kg / cm2 to 150 Kg under a 100% stress test / cm2. 00640.ptc page 19 589427 --_ year, month, day, amendment_ 6. Application scope of patent 2 3. Manufacturing method of pulling discoloration superfine fiber artificial leather-leather according to item 20 of the scope of patent application, among which 100 The polyurethane S resin in the resin composition under the% stress test was 60 Kg / cm2 to 130 Kg / cm2. 2) According to the manufacturing method of the above-mentioned patent application No. 20, the method for manufacturing a discoloration superfine fiber artificial leather and leather, wherein the resin composition further comprises acrylic resin. 25. The manufacturing method of pull-up discoloration ultra-fine fiber artificial leather according to item 24 of the scope of patent application, wherein the weight percentage of casein in the resin composition is 1 to 15%; the polyurethane resin The weight percentage k in the resin composition is 10-30%; and the weight percentage of the acrylic resin in the resin composition is 1-10%. 26. According to the manufacturing method of the top-pull discoloration ultra-fine fiber artificial leather & leather according to item 24 of the scope of the patent application, the acrylic resin in the resin composition under the 100% stress test is 23 0 Kg / cm2 to 270 Kg / cm2. — 00640.ptc Page 20