Method for preparing high-cohesive-force polyurethane elastic fibers
A technology of polyurethane elasticity and cohesion, which is applied in the field of polyurethane elastic fibers, which can solve the problems of limited improvement of cohesion of polyurethane elastic fibers, reduction of lubrication between tows, etc., to achieve strong viscosity and improve cohesion
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[0016] Example 1:
[0017] In the spinning dope, add low-melting material ethylene-vinyl acetate copolymer with a melting point of 99°C, heat and solidify into filaments in the tunnel, and then twist the monofilaments into bundles. The spinning temperature in the tunnel is 200-300°C, and the added amount of the low-melting substance ethylene-vinyl acetate copolymer is 0.1%.
Example Embodiment
[0018] Example 2:
[0019] In the spinning dope, add low-melting material ethylene-vinyl acetate copolymer with a melting point of 99°C, heat and solidify into filaments in the tunnel, and then twist the monofilaments into bundles. The spinning temperature in the tunnel is 200-300°C, and the added amount of the low-melting substance ethylene-vinyl acetate copolymer is 0.5%.
Example Embodiment
[0020] Example 3:
[0021] In the spinning dope, a low-melting material polyolefin elastomer with a melting point of 162°C is added, heated and solidified into filaments in a tunnel, and then the monofilaments are twisted into bundles. The spinning temperature in the tunnel is 200-300°C, and the addition amount of the low-melting substance polyolefin elastomer is 2%.
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