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Biodegradable spandex for paper diaper, and preparation method thereof

A biodegradable, diaper technology, applied in the field of spandex fiber, can solve the problems of slow spandex biodegradation, no mention of spandex biodegradability, etc., and achieve excellent isolation, excellent adhesion effect, and improve the effect of adhesion.

Active Publication Date: 2015-05-20
ZHEJIANG HUAFENG SPANDEX
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above literature does not mention the biodegradability of spandex for diapers, and the biodegradation rate of conventional spandex for diapers is also relatively slow

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0021] The biodegradable spandex for diapers includes a biodegradation-promoting composition and a spandex for diapers, and the biodegradation-promoting composition contains 10-50 wt % of potassium dodecyl phosphate and 10-50 wt % of lauroyl glutamine 2-(2'-hydroxyl-3',5'-di-tert-butylphenyl)-benzotriazole of 30-60wt%; the mass percentage of the composition in spandex for biodegradable paper diapers is 1 ~20%; the composition of the spandex for paper diapers is polyurethane or polyurethane urea, or a mixture of the two. The preparation method of the present invention comprises the following steps:

[0022] 1) reacting oligomer dihydric alcohol and diisocyanate in a dimethylacetamide solution with a molar ratio of 1: 1.8 to 2.5 to generate a prepolymer;

[0023] 2) Carrying out a chain growth reaction on the above-mentioned prepolymer with an amine chain extender to obtain a polymer stock solution;

[0024] 3) Adding a biodegradation-promoting composition to the above-mention...

Embodiment 1

[0037] 5.22kg molecular weight is 1810 polytetrahydrofuran ether diol, 0.58kg molecular weight is 2000 polybutylene adipate diol and 1.67kg 4,4-MDI, in the dimethylacetamide solution of 10.45kg in React at 50°C for 120min to obtain an isocyanate-terminated prepolymer. When cooling to 12°C, gradually add 4975.7g of ethylenediamine containing 120.0g, 154.7g of 2-methylpentamethylenediamine, 23.8 g of diethylamine in N,N-dimethylacetamide solution undergoes a chain extension reaction to generate a polymer stock solution. Then add 380.6g (relative to the addition of spandex fiber is 5%) biodegradation promoting composition (containing 30wt% dodecyl phosphate potassium salt, 30wt% sodium lauroyl glutamate, 40wt% UV- 320), and 38.1g of antioxidant 245, 68.5g of TiO 2 , 114.2g of magnesium stearate, stirred and mixed evenly, and obtained the spinning stock solution after ripening.

[0038] The above-mentioned spinning stock solution is spun with a 56-hole spinneret, and is spun wit...

Embodiment 2

[0040] Spandex fibers were prepared according to the same method as described in Example 1, except that the added amount of the biodegradation-promoting composition was 10%.

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PUM

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Abstract

The invention relates to a biodegradable spandex for paper diaper, which comprises biodegradation promotion composition and spandex for paper diaper, wherein the biodegradation promotion composition includes potassium dodecyl phosphate, sodium lauroyl glutamate and UV-320. The preparation method of the biodegradable spandex for paper diaper comprises the following steps: 1) enabling oligomer diol to react with diisocyanate to generate prepolymer; 2) performing chain propagation reaction to the prepolymer through amine chain extender, to obtain polymer stock solution; 3) adding the biodegradation promotion composition to the polymer stock solution, and adding an antioxidant, a delustering agent and a lubricant, fully stirring, to obtain spinning stoack solution; and 4) performing dry-process spinning to the spinning stock solution to prepare the biodegradable spandex for paper diaper. The biodegradable spandex for paper diaper has high biodegradation speed, excellent adhesion effect with base materials, and smooth unwinding property.

Description

technical field [0001] The invention relates to a preparation technology of spandex for paper diapers, belonging to the technical field of spandex fiber. More specifically, the present invention relates to a biodegradable spandex for paper diapers and its preparation technology. Background technique [0002] Diapers are disposable diapers made of materials such as non-woven fabric (non-woven fabric), absorbent core (cotton) and elastic thread (spandex). With the release of the national "separate two-child" policy, the aging of the population, and the change in the consumption concept of the new generation, the use of diapers has increased significantly, and the demand for spandex for diapers has also increased. The problems caused by this That is, the abandonment of a large number of spandex used in diapers has an impact on the environment. Although spandex contains a large number of carbamate groups, it has a certain degree of biodegradability, but its degradation rate is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/94D01F1/10C08G18/66C08G18/48C08G18/42
Inventor 陈厚翔梁红军李晓庆李娟许图远王靖
Owner ZHEJIANG HUAFENG SPANDEX
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