Preparation method of spandex used for paper diapers

A technology of diapers and spandex, which is applied in the field of polyurethane elastic fiber preparation, can solve the problems of high fiber surface friction coefficient, easy adhesion between silk and silk, and large unwinding tension, so as to reduce adhesion between fibers, reduce surface static friction coefficient, Ensure the effect of unwinding tension

Active Publication Date: 2018-06-29
ZHEJIANG HUAFENG SPANDEX
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, through the addition of POSS, the technical problems such as high friction coefficient on the surface of spandex, easy adhesion between filaments, excessive unwinding tension, and easy filament breakage under the process conditions of spandex without oiling are solved.

Method used

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  • Preparation method of spandex used for paper diapers
  • Preparation method of spandex used for paper diapers
  • Preparation method of spandex used for paper diapers

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0025] (1). Preparation of POSS solution. Add POSS and organic solvent into a glass container, first use a mechanical stirrer to mix at high speed for 0.5-2 hours, and then use an ultrasonic oscillation disperser to process the mixture for 1-3 hours to obtain a uniformly dispersed POSS solution.

[0026] (2). Preparation of mixed spinning dope. Add the POSS solution into the polyurethane urea solution, stir and mix for 24-48 hours at a constant temperature of 40-60 degrees to obtain a spandex spinning stock solution.

[0027] (3). Preparation of spandex for paper diapers. The spinning stock solution is transported to the spinneret assembly, and then the fine stream of the stock solution is formed through the pores of the spinneret; the fine stream of the stock solution passes through the spinning tunnel at 240-260 degrees to evaporate the organic solvent and becomes a primary fiber; The twister twists and clings to form a bundle, which is drawn by a guide roller and wound by...

Embodiment 1

[0040] Use with -CH 2 CH 2 CF 3 1.5kg of POSS compounds with functional groups and 5.0kg of dimethylacetamide were added into the reaction tank together, firstly mixed with a mechanical stirrer at high speed for 2 hours, and then ultrasonically treated the mixed solution for 1 hour with an ultrasonic oscillation disperser to obtain a concentration of 20% POSS solution. The POSS solution is added to the polyurethaneurea solution with a concentration of 35%, and the mass ratio of POSS to polyurethaneurea is 1 / 99. Stir and mix at a constant temperature of 45 degrees for 28 hours, and obtain a mixed spinning stock solution after aging. The spinning raw solution is transported to the spinneret assembly, and then forms a fine stream of the raw solution through the pores of the spinneret; the thin stream of the raw solution evaporates the solvent through the 260-degree spinning tunnel and becomes a primary fiber; twists 48 primary fibers through an air false twister Twisting and ...

Embodiment 2

[0042] Using the same experimental method as in Example 1, the difference is that the functional group of POSS is -CH 2 CH 2 CH(CF 3 ) 2 , and the prepared spandex for diapers was recorded as sample 2.

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Abstract

The invention provides a preparation method of spandex used for paper diapers. The method includes the steps of: 1) dispersing polyhedral oligomeric silsesquioxane (POSS) in an organic solvent, and mixing the POSS solution with a polyurethane-urea solution, and aging the mixture to prepare a spandex spinning solution; 2) evaporating the spandex spinning solution to remove the organic solvent through a high-temperature course way to form initial fibers; and 3) performing false twisting, drafting and winding to obtain the spandex used for paper diapers. The method can guarantee excellent adhesion property of the spandex and is free of oiling treatment. Meanwhile, by means of the POSS, the problems that spandex is large in fiber surface friction coefficient, is not smooth in de-winding, is liable to cause adhesion and breaking in the absence of an oiling agent can be solved.

Description

technical field [0001] The invention belongs to a method for preparing polyurethane elastic fibers, in particular to a method for manufacturing spandex special for paper diapers. Background technique [0002] Diapers are generally composed of three parts: surface covering layer, absorbent core layer and elastic thread. The elastic thread is the key material for the elastic waist and side leakage protection of diapers. Most of the elastic threads currently in use are spandex fibers with excellent performance. This spandex product is called spandex for diapers. Although spandex accounts for only 2-3% of the cost of diapers, the performance of spandex directly affects the quality of diapers and the production efficiency of diapers. Generally speaking, spandex for diapers with excellent performance should have three characteristics: suitable elasticity, smooth unwinding and good adhesion. First of all, spandex for diapers needs to have appropriate elasticity and elastic recov...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/88A61L15/26
CPCA61L15/26D01F6/88C08L75/04
Inventor 许图远杨晓印梁红军王靖陈厚翔周志伟邵晓林
Owner ZHEJIANG HUAFENG SPANDEX
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