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    • 4. 发明授权
    • Leather
    • 皮革
    • US08481169B2
    • 2013-07-09
    • US12666806
    • 2008-06-27
    • Shinji KashiwaguraSeiji YamaguchiYoshiyuki ItoTakashi Yamaguchi
    • Shinji KashiwaguraSeiji YamaguchiYoshiyuki ItoTakashi Yamaguchi
    • C14C9/00C14C3/16C14C3/28
    • C14C3/28C14C3/04C14C3/16C14C3/20C14C3/22C14C9/02Y10T428/4935
    • A leather obtained by a (1) pre-treatment before tanning, (2) tanning process where glutaraldehyde is used as a tanning agent, (3) process where a re-tanning agent is used which is constituted by synthetic tannin, resin and aluminum, of which the synthetic tannin is constituted by (a) condensation product of aromatic sulfonic acid with formaldehyde or mixture of aromatic sulfonic acid and condensation product of aromatic sulfonic acid with formaldehyde, (b) methylene cyclic polymer of aromatic sulfonic acid with hydroxy aromatic compound or mixture of aromatic sulfonic acid and methylene cyclic polymer of aromatic sulfonic acid with hydroxy aromatic compound and (c) glyoxal, while the resin is constituted by (a) acrylic acid, methacrylic acid, acrylic acid ester or methacrylic acid ester polymer(s) and mixture thereof, and copolymer(s) thereof or mixture thereof and (b) polycondensation product of melamine with formaldehyde, wherein the re-tanning agent having the aforementioned composition is used to perform re-tanning, followed by dyeing as well as fatliquoring treatment using a fatliquoring agent constituted by (a) synthetic oil and natural oil and (b) mixture of synthetic oil and natural constituent, and (4) post-treatment after re-tanning; wherein said leather is characterized in that it is flexible and has unique elasticity and softness beyond what is presented by the material hide and has restorability that prevents the leather from stretching more than it should, and also in that its conditions include a BLC stiffness/softness of 4.42 mm or more but 4.90 mm or less and maximum set ratio of 10.7 or more but 13.9 or less.
    • (1)在鞣制前预处理得到的皮革,(2)将戊二醛用作鞣剂的鞣制过程,(3)使用由合成鞣酸,树脂和铝构成的再鞣剂的方法 ,其中合成单宁由(a)芳族磺酸与甲醛或芳族磺酸的混合物与芳族磺酸与甲醛的缩合产物的缩合产物,(b)芳族磺酸与羟基芳族化合物的亚甲基环状聚合物 或芳族磺酸与羟基芳族化合物的亚甲基环状聚合物的混合物和(c)乙二醛,而树脂由(a)丙烯酸,甲基丙烯酸,丙烯酸酯或甲基丙烯酸酯聚合物构成, 及其混合物及其共聚物或其混合物,和(b)三聚氰胺与甲醛的缩聚产物,其中具有上述组合物的再鞣剂 使用由(a)合成油和天然油构成的加脂剂和(b)合成油和天然成分的混合物进行染色和加脂处理,以及(4)后处理 经鞣制后; 其中所述皮革的特征在于它是柔性的并且具有超越由材料皮肤呈现的弹性和柔软度,并且具有防止皮革拉伸超过其应力的可恢复性,并且其条件包括BLC刚度/柔软度 4.42mm以上但4.90mm以下,最大设定比例为10.7以上且13.9以下。