• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A leather-like sheet material bearing a remarkable resemblance to high-quality leathers of natural origin, especially in respect of flatness, bending crimp, grain and feeling, is produced by providing a substrate consisting of a fibrous base material and a porous coating layer with a thin layer of a polymer, subjecting the surface to a specific heat treatment, providing the resulting material with another thin layer of a polymer, and, if desired, embossing the material.
    公开号:SU826966A3
    申请号:SU782662359
    申请日:1978-09-04
    公开日:1981-04-30
    发明作者:Нисимура Такео；Акамата Казундо
    申请人:Курарей Ко.Лтд (Фирма)；
    IPC主号:
    专利说明:

    I
    The invention relates to light industry, in particular to the development of a method for producing artificial leather.
    A method of producing artificial leather is known by applying a polyurethane solution with a nitrogen content to a fiber basis. % or a mixture of it with a vinyl polymer, coagulated in a solvent or an anhydrous solution to form a porous polyurethane layer,
    by washing, drying and subsequent heat pressing fl.
    However, this method does not allow obtaining artificial skin with high resistance to bending and with a surface neck similar to natural leather.
    The purpose of the invention is to increase the resistance to bending of artificial leather and giving it a superficial neck, similar to natural leather.
    The goal is achieved by applying a polyurethane solution with a nitrogen content of 3-7% by weight or a mixture of it with vinyl on the fiber base.
    polymer, coagulation in an aqueous solution of the solvent to form a porous polyurethane layer, washing, drying and subsequent heat pressing, before heat pressing a non-porous layer is applied to the porous layer from the specified polyurethane or its mixture with a vinyl polymer, and heat pressing is carried out by pressing a metal surface non-porous layer during ZO-9O with a temperature at the beginning and end of contact, respectively 12O-180 C and ZO-100 C, with the difference between the contact temperatures at the beginning and at the end of the thermal pressing O-90 ° C, followed by the application, after thermal pressing, of the surface of a non-porous layer of the polyurethane or its mixture with an acrylic polymer.
    Example 1. Non-woven material from nylon. impregnated with a solution containing 15% polyurethane polyurethane elastomer Leadipatglycol, 1,4-butadiol and dnphenylmethane-4,4-aiisocyanate with 4.7% nitrogen, 3% brown pigment, 3% water and 79% cimethylformamide, this solution t per impregnated material in such an amount that the amount of solids on the material is 80 g / m. Then the material is treated for 30 minutes at 40 ° C with an aqueous solution containing 35% dimethylformamide, the solvents are washed with water and dried. The porosity of the porous substrate is 6O%. A solution containing 10% of the above polyurethane elastomer, 28% dimethyl with yes, 38% acetone and 24% cyclohexanone is applied to the above substrate in such an amount that the thickness of the face layer on the dry residue is 2. The substrate is dried and subjected to heat treatment using a metal endless ribbon with a smooth novelty for 90 s, the temperature in the pressing zone being, and in the zone of removing the semifinished product from the ribbon, 80 C. The heat treatment is carried out in such a way that the substrate is pressing it against a metal tape with a pressure of 2 kg / s using a rubber roller acting from the back and then moving it along with the tape to the removal zone without pressure. In the stripping zone, the substrates are separated from the tape. Get skin with a smooth surface. Then the substrate is applied to the finish. a solution containing 7% polyurethane elastomer of polyethylene glycol, ethylene glycol and dnfenilmetan-4,4-di-isocyanate with 5.5%. nitrogen, 2% metallox plex dye, 18% dimethylformamide, 42% acetone and 31% cyclohexane. Curing (so that the rubbed coating in dry form is 2fj. Leather-like film material is obtained which has excellent leather-like neck and / and excellent bend (in the table skin is marked A). Example 2. Similarly to the first model, leather-like The film material, however, with the difference that the thickness of the face and finishing polymer layers is 25 / tl, the skin has a uniform colouration, good skin-like appearance and high bending (in the table, skin is indicated B). p 3. The solution, holders of an 8% polyurethane uretavogo elastomer from poly 6c caprolactoneglycol, ethylene glycol and dienylmethane-4, 4-diisocyanate with 3.8% nitrogen, 2% polyvinyl chloride,% titanium dioxide and .89% dimethylacetamite, are applied to polyethylene film in such a way that the content of solids is about 60 g / m of gels.The coated film is then treated for 30 minutes at 4 ° C with an aqueous solution containing 20% dimethylacetamide. The solvents are removed and the film is foil removed from the polyethylene film and dried. The resulting porous film is bonded to a woven polyester fabric using an urethane elastomer. The porosity of the obtained semi-finished product is 73%. A solution containing 6% of the same polyurethane elastomer, 2% polyvinyl chloride, 20% dimethylacetamide, 42% acetone and 30% cyclohexanone is applied to the resulting semi-finished product so as to create a facial evil after drying with a thickness of 1.5 / and. It is then dried and heat treated under the same conditions and using the same device as in the case of producing a skin-like film material, similarly to Example 1, but with the difference that the temperature in the pressing zone is 14 ° C and The removal zone is -4O C. The solution, containing 8% of the polyurethane elastomer itself, 4% organic polycyclic pink pigment, 18% dimethyl acetamide, 42% acetone and 28% cyclohexanone, is then applied to the heat-treated fabric in such a way to tol ina finishing layer after drying was 3.1 la. Then. The resulting leather-like leather in the table is designated (H), it is very smooth, leather-like and has a high resistance to bending. Example 4. A nonwoven material made from mixed fibers of polyethylene n nylon is impregnated with a solution containing 12% polyurethane polyurethane elastomer glycol , diphenylmethane- -4.4 nziisocyanat.a n ethanolamine with. 4.8% isocyanate nitrogen, 1% carbon black, and 87% dimethylacetamide. Then the same polymer solution is applied to the material in such a way that the solids content is 60 g / m. After that, the material is immersed for 30 minutes at 45 ° C in an aqueous solution containing 30% aimethylacetamund in order to coagulate the polymer. Then-; the ethylene fiber is extracted with toluene, the solvent is removed and the material is dried and treated with a plasticizer. The resulting prlufabri, cat has a porosity of 65%. A solution containing 10% of the above. polyurethane elastomer, 28% dimethylformamide, 38% acetone and 24%. cyclohexanone is applied to the porous substrate so that the thickness of the face layer after drying is .jJc. The substrate is dried and subjected to heat treatment i under the same conditions and using the same device as in Example 1, however, c. the difference is that the substrate and metal tape are heated 1 minute before. A solution containing 6% polyurethane elastomer, 3% polymethyl methacrylate, 3% megalocomplex dye, 17% dimethylformamide, 30% acetone and 41% cyclohexanone is then applied to the face layer so that the thickness of the finishing layer after drying S / j After that, the semi-finished product is subjected to crushing. The artificial leather thus obtained (indicated in Table CJ) is very smooth and has good bending resistance. Properties of artificial leather are presented in the table.
    权利要求:
    Claims (2)
    [1]
    Claim
    The method of obtaining artificial leather _
    40 application of a polyurethane solution with a nitrogen content on the fibrous base
    [2]
    3-7 wt.% Or mixtures thereof with vinyl. polymer, coagulation in an aqueous solvent solution to form a porous polyurethane layer, rinsing, drying and subsequent heat pressing, characterized in that, in order to increase the resistance to bending of artificial leather and give it a surface-like neck of genuine leather, before heat pressing on a porous layer is applied with a non-porous layer of the specified polyurethane or its mixture with a vinyl polymer, and thermal pressing is carried out by pressing the metal surface to the non-porous layer for 3.0-90 s at the temperature of the beginning and end of the contact, respectively, 120-180 ° C and 30-1 d6 ° C with a difference between the contact temperatures at the beginning and at the end. a thermopressing of 20-90 C followed by deposition after thermopressing the surface of a non-porous layer of the specified polyurethane or its mixture with an acrylic polymer.
    类似技术:
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    同族专利:
    公开号 | 公开日
    GB2003401B|1982-02-03|
    DE2836307C2|1983-12-29|
    US4216251A|1980-08-05|
    GB2003401A|1979-03-14|
    DE2836307A1|1979-03-22|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
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    NL283324A|1961-09-27|
    US3262805A|1963-03-14|1966-07-26|Toyo Cloth Company Ltd|Process of coating to make leather substitute and resulting article|
    US3481767A|1966-01-12|1969-12-02|Du Pont|Process for applying a polyurethane finish composition to synthetic microporous polymeric materials|
    US3565981A|1967-05-09|1971-02-23|Du Pont|Process for preparing a composite moisture-permeable sheet material|
    DE2009338C3|1969-03-17|1979-09-13|Dainippon Ink And Chemicals, Inc., Tokio|Process for the preparation of an aqueous dispersion containing air bubbles and the use thereof|
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    US3841897A|1972-10-17|1974-10-15|Toray Industries|Artificial leather|
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    US5335935A|1992-08-31|1994-08-09|Plastic Mold Technology Incorporated|Air bag cover/molded article with integral cover layer of leather|
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    JP10711777A|JPS578233B2|1977-09-05|1977-09-05|
    JP10711677A|JPS6051591B2|1977-09-05|1977-09-05|
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