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Spandex with long-acting insect-resistant performance and preparation method thereof

An anti-insect and spandex technology, which is applied in rayon manufacturing, fiber chemical characteristics, textiles and paper making, etc., can solve the pungent smell, and at the same time, clothes that have been exposed to such substances must be exposed to sunlight for a period of time before wearing. Reduce fiber strength, volatile and other issues

Active Publication Date: 2014-07-16
ZHEJIANG HUAFENG SPANDEX
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, directly using items such as "moth balls" and "hygienic balls" in the closet to prevent insects has many adverse effects. First, it will make the clothes smell pungent. Put it in the sun for a period of time to volatilize the aromatic compounds in the clothes so as not to harm the body; 2. For example, "health balls" are volatile, and the volatilized substances can chemically react with the high-molecular organic compounds in the synthetic fibers, making them The fabric is damaged or the fiber strength is reduced, and even the chemical fabric is melted into tiny cavities

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0028] (1) Preparation of prepolymer: Add solvent and polyether in sequence to the reactor, and then accurately add diisocyanate according to a certain NCO / OH ratio. The prepolymerization reaction temperature is controlled at 40-50°C, the reaction time is 90min-150min, and nitrogen atmosphere is used during the reaction.

[0029] (2) Transfer the obtained prepolymer solution to the chain extension tank, and when the temperature of the prepolymer solution is cooled to 0-20°C, slowly add the chain extension amine solution to carry out the chain extension reaction to obtain the polyurethane urea solution.

[0030] (3) Add various functional additives and pest control additives to the obtained polyurethane urea solution, and stir for 2-8 hours to obtain a uniform and stable polyurethane urea spinning stock solution.

[0031] (4) The spinning stock solution is transported by the metering pump, and then the spinning operation is carried out through the spinning assembly, the dry spi...

Embodiment 1

[0046] The specific preparation process of the long-acting anti-insect performance additive "chitosan-2-camphorone" is as follows:

[0047]Measure 180ml of distilled water, add 20 grams of water-soluble chitosan, stir fully to form a solution with a mass fraction of 10% water-based chitosan; measure 198g of acetone, add 2g of 2-camphor, stir fully to form a mass fraction It is the acetone solution of 1% 2-camphorone; pour the acetone solution into the aqueous solution, stir and mix, dry at low temperature, remove the water, and grind it into powder.

[0048] The specific preparation process of long-acting insect-proof performance spandex is as follows:

[0049] Add 6kgDMAc and 10kgPTMG into the prepolymerization tank, stir and mix evenly, when the temperature reaches about 25°C, add 2.7kg of diisocyanate, raise the temperature to 40°C, and the reaction time is 90min to obtain the prepolymerization product. Transfer the pre-polymerization product to the chain extension tank, a...

Embodiment 2

[0051] The specific preparation process of the long-acting anti-insect performance additive "chitosan-2-camphorone" is as follows:

[0052] Measure 180ml of distilled water, add 45 grams of water-soluble chitosan, stir fully to form a solution of 20% mass fraction of water-based chitosan; measure 196g of acetone, add 4g of 2-camphor, stir fully, form a mass fraction 2% acetone solution of 2-camphorone; pour the acetone solution into the aqueous solution, stir and mix, dry at low temperature, remove water, and grind it into powder.

[0053] Add 5kgDMAc and 10kgPTMG into the prepolymerization tank, stir and mix evenly, when the temperature reaches about 25°C, add 2.7kg of diisocyanate, raise the temperature to 45°C, and the reaction time is 90min to obtain the prepolymerization product. Transfer the pre-polymerization product to the chain extension tank, add 5kg DMAc to the pre-polymerization tank, add cleaning solvent, transfer to the chain extension tank, cool to 8°C, and slow...

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Abstract

The invention relates to a spandex with long-acting insect-resistant performance and a preparation method of the spandex. The preparation method comprises the steps of feeding a solvent and polyether into a prepolymerization tank, then accurately feeding diisocyanate according to the set NCO / OH proportion, and carrying out prepolymerization reaction; after the reaction, transferring the product of the prepolymerization reaction into a chain extension tank, and evenly stirring; slowly controlling the dropping of chain extension amine and chain terminator solution at the low temperature to finally form polyurethane-urea solution; feeding an insect-resistant auxiliary agent, an antioxidant, an uvioresistant auxiliary agent, a dyeing auxiliary agent, a delustering agent, a lubricating agent and the like, fully and evenly stirring, and carrying out vacuum defoamation; carrying out dry spinning to obtain the spandex fiber. The spandex prepared by the invention is capable of guaranteeing the performance indexes of the similar conventional products, but also has the long-acting insect-resistant performance.

Description

technical field [0001] The invention relates to spandex with long-acting insect-proof performance and a preparation method thereof, belonging to the field of polyurethane elastic fibers. Background technique [0002] Spandex, a highly elastic textile fiber, has the advantages of high strength, light specific gravity, and large elastic recovery rate at room temperature, and is widely used in fabrics. Various varieties of chemical fibers and natural fibers, such as cotton, linen, silk, wool, etc. have their own advantages and disadvantages. Common ones such as: cotton / spandex, after interweaving, can maintain all the advantages of cotton fiber, but cotton fiber itself is inelastic, while spandex can maintain the elasticity of the fabric. [0003] As we all know, general man-made fibers are made of reeds, cotton stalks, corn stalks, etc., through chemical processing. These raw materials contain cellulose, which is suitable for the growth and reproduction of mold and insects, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/94D01F1/10C08G18/76C08G18/48C08G18/32
Inventor 邵晓林梁红军毛植森许图远费长书李晓庆
Owner ZHEJIANG HUAFENG SPANDEX
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