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A kind of method of making spandex elastic fiber for diapers

A technology of elastic fiber and diapers, which is applied in the field of daily chemical products, can solve the problems of poor creep resistance and affecting wearability, and achieve stable rebound performance, comfortable wearing and moderate rebound performance

Inactive Publication Date: 2015-08-26
厦门力隆氨纶有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0002] Among the existing diaper products using spandex fiber, almost all products are developing towards high resilience performance. In addition to using the same process route to finally produce finished products, they also improve the formula or processing conditions of the product. Improve its resilience index, but too high resilience will lead to poor creep resistance of the product, which greatly affects the wearability of diaper products using spandex fiber

Method used

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Embodiment Construction

[0022] The technical solutions of the present invention will be further illustrated and described below through specific embodiments.

[0023] A method for making spandex elastic fibers for paper diapers, comprising the steps of:

[0024] (1) Mix polyether diol and diisocyanate at a molar ratio of 1:1.6 to react to form a prepolymer, the reaction temperature is 80-90°C, and the reaction pressure is 1.5-3kgf / cm 2 , the reaction time is 4-6 hours;

[0025] (2) After dissolving the above prepolymer with dimethylacetamide, add mixed amines for chain growth reaction to form a block copolymer solution, wherein the weight ratio of prepolymer to dimethylacetamide is 65-70: 30-35, the mixed press is ethylenediamine, propylenediamine and diethylamine with a mass ratio of 70-85:15-25:8-12, and the addition of the mixed amine is the total mass of the prepolymer 1.5-2.5%, the temperature of the chain extension reaction is 80-90°C, and the reaction pressure is 1.5-2.5kgf / cm 2 , the react...

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Abstract

The invention discloses a method of preparing elastic spandex fibers for paper diapers. The method comprises the following steps that (1) polyether diol and diisocyanate are mixed and react to produce prepolymers; (2) the prepolymers are dissolved through dimethylacetamide, then mixed amine is added for chain growth reaction, and segmented copolymer solution is formed; (3) polymer dope is made by mixing, balancing and filtering the segmented copolymer solution; (4) under the continuous action of a certain amount of pressure, the polymer dope is uniformly and quantitatively pressed in a spinning head through a metering pump, and then is squeezed out of pores in a spinneret plate to form a filament trickle, and the filament trickle enters a passageway filled with hot air; (5) the dimethylacetamide in the filament trickle is removed in a volatilization mode, therefore, the concentration of the filament trickle is increased continuously until the filament trickle is solidified, and meanwhile a winding roller operates to enable the filament trickle to be pulled to be thinned and form spandex filaments; (6) the spandex filaments are wound to form elastic spandex fiber products.

Description

technical field [0001] The invention belongs to the field of daily chemical products, and in particular relates to a method for making spandex elastic fibers for paper diapers. Background technique [0002] Among the existing diaper products using spandex fiber, almost all products are developing towards high resilience performance. In addition to using the same process route to finally produce finished products, they also improve the formula or processing conditions of the product. Improve its resilience index, but too high resilience will lead to poor creep resistance of the product, which greatly affects the wearability of diaper products using spandex fiber. Contents of the invention [0003] The purpose of the present invention is to overcome the defects of the prior art and provide a method for making spandex elastic fibers for paper diapers. [0004] Technical scheme of the present invention is as follows: [0005] A method for making spandex elastic fibers for pa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F6/70D01F6/72C08G18/66C08G18/48C08G18/10D01D13/00
Inventor 张光文
Owner 厦门力隆氨纶有限公司
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