Polyurethane nonwoven fabric and method for producing the same

CN116836360BActive Publication Date: 2026-08-28ZHENGZHOU ZHONGYUAN SPANDEX ENG TECH CO LTD
View PDF 2 Cites 0 Cited by

Patent Information

Application Number
CN202310808206.6
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-07-03
Publication Date
2026-08-28
Estimated Expiration
2043-07-03

AI Technical Summary

Technical Problem

[0004]然而，聚氨酯材料的回潮率通常较低，使用聚氨酯制备的弹性无纺布虽然透气性远超弹性薄膜，但由其制得的制品在使用时舒适感较差，因此有必要对现有的聚氨酯无纺布作出改进，提高聚氨酯弹性无纺布的舒适性

Benefits of technology

[0021]本发明的聚氨酯弹性无纺布的原料包括聚合物多元醇、二异氰酸酯和和扩链剂，其中，所述聚合物多元醇由芳族二元酸或其衍生物，与特定的聚醚二醇等原料通过缩合反应或酯交换反应得到，以上述聚合物多元醇为原料，相比于常规的以聚酯多元醇或聚醚多元醇为原料的聚氨酯无纺布，能将聚乙二醇醚氧键密度较高的特点引入聚氨酯分子中，较高的醚氧键密度使得聚氨酯分子具备较好的吸水性，提高了聚氨酯弹性无纺布的吸水性，能使得聚氨酯弹性无纺布更亲肤，使用更加舒适。同时聚氨酯分子的软段中包含酯键连接的芳族基团-聚乙二醇嵌段结构，保证了聚氨酯无纺布的弹性回复率和回复模量，使无纺布具备合格的弹性回复性能。

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure QLYQS_1
    Figure QLYQS_1
  • Figure BDA0004318747060000021
    Figure BDA0004318747060000021
  • Figure BDA0004318747060000051
    Figure BDA0004318747060000051
Patent Text Reader

Abstract

The present application provides a kind of polyurethane non-woven fabric and its preparation method, the raw material of the polyurethane elastic non-woven fabric includes polymer polyol, diisocyanate and chain extender, the polymer polyol is obtained by condensation reaction or ester exchange reaction from the raw material including class A and class B, wherein the class A includes aromatic diacid, its ester or anhydride, class B includes polyether glycol.Compared with conventional polyurethane non-woven fabric with polyester polyol or polyether polyol as raw material, the scheme of the present application can introduce the characteristics of higher polyethylene glycol ether oxygen bond density into polyurethane molecule, improve the water absorption of polyurethane elastic non-woven fabric, so that the polyurethane elastic non-woven fabric is more skin-friendly and more comfortable to use.At the same time, the soft segment of polyurethane molecule contains ester bond connected aromatic group-polyethylene glycol block structure, which ensures the elastic recovery rate and recovery modulus of polyurethane non-woven fabric, so that the non-woven fabric has qualified elastic recovery performance.
Need to check novelty before this filing date? Find Prior Art

Citation Information

Patent Citations

  • Polyether ester polyhydric alcohol and using method thereof

    CN102504223A

  • Polyurethane urea fiber or film and preparation method thereof

    WO2023274810A1