The extrusion temperature of polyamide is set to 180 ~ 290℃), so that the cross section of the obtained composite fiber is radial, and the polyester polymer A and the polyamide polymer B are arranged at intervals, and it is not necessary to reduce and defibrate with alkaline solution or solvent, so as to obtain the ultra-fine fiber which is approximately flat and banded.
After non-woven fabric manufacturing, microwave treatment, resin treatment, grinding, kneading or impact, and surface treatment, artificial leather with good internal and surface texture can be obtained. Its softness and drapability are better than those of traditional round-section superfine fiber artificial leather, and no waste water is produced in the manufacturing process, which belongs to environmental protection products.
Extended data
Polyurethane has the following characteristics:
1, folding endurance is comparable to natural leather. Bending at room temperature can reach 200,000 times without cracks, and bending at low temperature (-20℃) can reach 30,000 times without cracks (good temperature resistance and mechanical properties).
2. Moderate elongation (good skin feeling).
3. High tear strength and peel strength (high abrasion resistance, tear strength and tensile strength).
4, there will be no pollution from production to use, and the environmental protection performance is superior.
Some top foreign polyurethanes are very high-tech, and high-end applications will be more expensive than leather. The appearance effect of polyurethane is most similar to genuine leather, and its products are superior to natural leather in thickness uniformity, tear strength, bright color and leather utilization rate, which has become the development direction of contemporary synthetic leather.
If the surface of polyurethane is dirty, it can be scrubbed with high-grade gasoline or clean water, and other organic solvents or alkaline substances are not allowed to be scrubbed to prevent the quality from being damaged. Usage conditions of polyurethane: the heat setting temperature should not exceed 25 minutes at 100℃, 100 minutes at 120℃ and 5 minutes at 130℃.
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