Coloring method of nylon-6 by using liquid coloring technology

A technology of dope dyeing and nylon, applied in the direction of adding dyes, single-component polyamide rayon, etc. to the spinning solution, which can solve the problems of easy fading, difficulty in monofilament coloring, and poor aging resistance.

Inactive Publication Date: 2012-05-23
EAST CHINA SEA FISHERIES RES INST CHINESE ACAD OF FISHERY SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The present invention needs to break through the problem of difficult coloring of monofilaments made of nylon slices and color masterbatches, and solve the problems of uneven color quality, poor color fastness, easy fading, and poor aging resistance of colored silks made of nylon slices and color masterbatches. Problem, provide a coloring method for dope dyed nylon 6

Method used

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Embodiment Construction

[0006] The raw material of nylon 6 monofilament is composed of many small molecules, which are connected by chemical polymerization to form a polymer material. The present invention is equipped with polymerization equipment according to the following requirements: the melting kettle is heated by a steam interlayer sleeve, attached to a color paste storage tank, and the stirring speed is 600 rpm; the filter is a star type filter with a built-in 400 mesh / cm 2 Stainless steel filter, heating with external steam interlayer sleeve; polymerization reactor, capacity 250 liters, electromagnetic heating; cooling water tank; slicer.

[0007] Preparation of raw material for coloring polyamide 6 monofilament: coloring agent is added after dissolving caprolactam, the raw material of nylon, before polymerization, so that dye molecules or fine pigment particles are evenly distributed between caprolactam molecules, and caprolactam is colored. Colorant is an additive to nylon, it has two categ...

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Abstract

The invention discloses a coloring method of nylon-6 by using a liquid coloring technology, relating to the production of fishery drift net materials. The method is characterized in that: a fusion vessel, a filter, a polymerization vessel, a cooling water tank, and a slicing machine are adopted in the method; phthalo blue and yellow are selected to prepare a coloring agent, the coloring agent is grinded into fine particles having a particle size of less than 1-2 mu; the coloring agent is added after caprolactam is dissolved and before polymerization, and the weight ratio of caprolactam to the coloring agent is 50:1; a hydrolytic polymerization of caprolactam comprises three stages: stage 1, a hydrolytic ring opening reaction of caprolactam is carried out, the coloring agent and caprolactam are heated up to 250 DEG C, the pressure is increased to 2-7 kg, and the time is 180 min; and stage 2, a step-growth ring opening addition polymerization of caprolactam is carried out, a pressure of more than 7 kg is maintained, and the time is 90 min; and stage 3, a condensation polymerization of caprolactam is carried out, after high temperature and high pressure reaction, moisture of materials are pumped out by vacuum pumping. According to the invention, coloring effect is achieved, and simultaneously the spinning requirement is satisfied.

Description

technical field [0001] The invention relates to gillnet material for fishing and its production. Background technique [0002] Nylon 6 monofilament is the main material for fishery gillnet operations. The raw material of nylon 6 monofilament is caprolactam, and its monomer is a white flaky crystal. After polymerization, it can be made into polymer materials. into a colorless transparent monofilament. Due to the requirements of fishery production and the living habits of fish, convective gillnet materials, it is necessary to color the colorless and transparent monofilament, which can increase the fish catch and improve economic benefits. Therefore, colorless and transparent nylon slices will be added The color masterbatch is made of colored silk, and its advantages meet the needs of coloring, but the monofilament produced by spinning has uneven color quality, poor color fastness, easy to fade, and poor anti-aging, so it is not suitable for gill net materials. make. Conten...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G69/16C08J3/20D01F6/90D01F1/06
Inventor 刘根鸿柴秀芳汤振明石建高徐宝生
Owner EAST CHINA SEA FISHERIES RES INST CHINESE ACAD OF FISHERY SCI
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