摘要:
A regenerated collagen fiber which is light-colored, feels excellent to the touch when it is wet, can be easily made to have a desired shape, and can tenaciously retain the shape. Further, the regenerated collagen fiber can be inhibited from emitting an odor during heating. The fiber is one obtained by treating collagen with a monofunctional epoxy compound and an aluminum salt. Also provided is a process for producing a regenerated collagen fiber characterized by treating collagen with a monofunctional epoxy compound and then treating it with an aluminum salt in such a manner that the collagen comes to contain the aluminum salt in an amount of 2 to 40 wt.% in terms of aluminum oxide (Al2O3).
摘要:
Provided is a natural leather having a novel coating layer which feels leathery. The coating film retains material properties such as strength and wearing resistance. When the user directly touches the natural leather, the coating layer present on the surface of the natural leather gives slick characteristics of natural leathers and smoothness. The natural leather has a coating film formed on a surface thereof, the coating film including: a color coat layer formed from a mixture of a hard component (10% modulus is more than 2.3 but no more than 3.0) and a soft component (10% modulus is more than 0.0 but no more than 1.0) of a two-component polyurethane resin; and a topcoat layer formed from a mixture of a medium component (resin having a 10% modulus of more than 1.0 but no more than 2.3) and a soft component (resin having a 10% modulus of more than 0.0 but no more than 1.0) of a two-component polyurethane resin.
摘要:
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.
摘要:
A process for producing a regenerated fiber by treating a regenerated collagen fiber with a monofunctional epoxy compound and a metallic aluminum salt characterized in that, in the treatment with the monofunctional epoxy compound, sodium hydroxide is added to such a level as giving a concentration of 0.001 to 0.8 N in the liquor to be treated and the treatment is initiated by adding an inorganic salt in such a level as to give the water absorption ratio of the regenerated collagen fiber product of 100% or lower depending on the amount of the sodium hydroxide added; and a process for setting the regenerated collagen fiber characterized by heat-setting the regenerated collagen fiber obtained by the above production process by a wet heat treatment at 50 to 160 DEG C and a dry treatment at 20 to 220 DEG C.
摘要:
A regenerated collagen fiber which is light-colored, feels excellent to the touch when it is wet, can be easily made to have a desired shape, and can tenaciously retain the shape. Further, the regenerated collagen fiber can be inhibited from emitting an odor during heating. The fiber is one obtained by treating collagen with a monofunctional epoxy compound and an aluminum salt. Also provided is a process for producing a regenerated collagen fiber characterized by treating collagen with a monofunctional epoxy compound and then treating it with an aluminum salt in such a manner that the collagen comes to contain the aluminum salt in an amount of 2 to 40 wt.% in terms of aluminum oxide (Al2O3).
摘要:
The present invention provides regenerated collagen fibers which have light color and excellent touch in wet conditions and which can be formed into desirable shape with the shape being maintained properly. The present invention also provides regenerated collagen fibers whose foul odor generated in thermal treatment can be inhibited. The present invention relates to regenerated collagen fibers obtained by treating collagen with a monofunctional epoxy compound and an aluminum salt. The present invention also relates to a process for preparing regenerated collagen fibers which comprises treating collagen with a monofunctional epoxy compound, and then treating the same in such a way that 2 to 40 % by weight of an aluminum salt converted to an aluminum oxide (Al 2 O 3 ) basis is contained to said collagen.