Waterproof and breathable TPU film processing technology

Abstract

The invention discloses a waterproof and breathable TPU film processing technology. According to the technical scheme, the waterproof and breathable TPU film processing technology is characterized bycomprising the following steps that four melt-blowing heads with the calibers of 30-50 millimeters are connected with a four-direction translation mechanism and connected to a rack through the four-direction translation mechanism, temperature-controlled heating devices are arranged at the melt-blowing heads, the temperatures of the melt-blowing heads are adjustably set at 130-180 DEG C, and afterpolyurethane TPU masterbatch is taken to be modified and melted, spinning operation is performed through the melt-blowing heads, wherein the melt-blowing heads alternately perform translation in the forward and backward direction and in the left and right direction separately during spinning to perform reciprocating spinning; network-shaped TPU after spinning is completed is lightly pressed into afilm shape by a cooling roller; the TPU film pressed in the film shape is heavily pressed by a hot pressing roller to be extended into the uniform film. Compared with the prior art, the waterproof and breathable TPU film processing technology has the advantages that spinning is performed by adopting a four-direction reciprocating spinning method to obtain the pressed film by stacking a network-shaped structure, so that the film is internally provided with crisscross gaps, and has good air permeability under the premise of ensuring good waterproof performance through mutual closing.

Description

technical field [0001] The invention relates to a TPU processing technology, in particular, a waterproof and breathable TPU film processing technology is designed. Background technique [0002] The name of TPU is thermoplastic polyurethane elastomer rubber. It is a new type of organic polymer synthetic material, which can replace rubber or soft polyvinyl chloride material. Its good wear resistance and resilience are better than ordinary polyurethane, and its aging resistance is excellent. For rubber, it can be said that TPU is the most ideal material to replace PVC and PU, and is known as a new polymer material internationally. Its molecular structure is composed of rigid blocks obtained by the reaction of diisocyanates and chain extenders and soft segments obtained by the reactions of diisocyanates and macromolecular polyols. TPU has excellent high tension, high tensile strength, toughness and aging resistance, and has been widely used in medical and health care, electroni...

AI Technical Summary

Problems solved by technology

[0003] TPU film is the most widely used in the field of clothing. It is mainly used for compounding on the surface of fabrics as a windproof and waterproof layer. The traditional TPU film has a dense surface and has a good windproof and waterproof effect, but its long air permeability will make the wearer feel hot and uncomfortable. suitable for long-term wear