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Process for the production of flat viscose fibers and spinnerets used in the process

A technology of flat viscose and production method, which is applied in the direction of man-made filament made of viscose, fiber processing, wet spinning method, etc., can solve the problems of poor water dispersing effect and poor thermal insulation effect of non-woven products.

Active Publication Date: 2016-01-20
唐山三友集团兴达化纤有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problems that the existing viscose staple fibers have irregular circular cross-sections, poor thermal insulation effect, and poor water-dispersion effect when making non-woven products. 1. A production method of flat viscose staple fiber with stable product quality and wide application; the second is to provide a spinneret used in the process of producing flat viscose staple fiber

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment 1: the production method of flat viscose fiber for weaving

[0028] Cotton, wood and bamboo pulp are used as raw materials, and the raw materials of cotton, wood and bamboo pulp are mixed in any proportion.

[0029] In this example, the ratio of cotton pulp: wood pulp: bamboo pulp is 4:6:0, and the mixed batch of pulp is carried out according to this ratio.

[0030] a. Preparation of alkali cellulose: the pulp mixture is soaked and alkalized with NaOH solution, which is divided into two dips. The alkali concentration of the first dip: 225 grams per liter, when dipping for the first time, add the product of AkzoNobel, Sweden. Auxiliary agent BerolVisco388, the addition is 0.12% of the content weight of methyl cellulose, then impregnates for the second time, the alkali concentration of second impregnation: 181 g / liter, obtains alkali cellulose.

[0031] b. Preparation of spinning stock solution: aging the alkali cellulose, the aging temperature is 48 degrees, ...

Embodiment 2

[0038] Embodiment 2: the production method of ultrashort flat viscose fiber

[0039] Cotton, wood and bamboo pulp are used as raw materials, and the raw materials of cotton, wood and bamboo pulp are mixed in any proportion.

[0040] In this example, the ratio of cotton pulp: wood pulp: bamboo pulp is 3:5:2, and the mixed batch of pulp is carried out according to this ratio.

[0041] a, preparation of alkali cellulose: the pulp mixture is dipped and alkalized with NaOH solution, divided into two dips, the alkali concentration of the first dip: 228 g / liter, when dipping for the first time, add the product of AkzoNobel, Sweden Auxiliary agent BerolVisco388, the addition amount is 0.18% of the content weight of methyl cellulose, then impregnates for the second time, the alkali concentration of second impregnation: 185 g / liter, obtains alkali cellulose.

[0042] b. Preparation of spinning stock solution: aging the alkali cellulose, the aging temperature is 47 degrees, the aging ti...

Embodiment 3

[0051] Embodiment 3: the spinneret of producing flat viscose fiber

[0052] A spinneret used for producing flat viscose fibers. The spinneret is a combination spinneret with rectangular orifices, and the whole is a ring structure. The shape of the orifice of the spinneret cap is rectangular, and the aspect ratio of the orifice is 6-12:1. Rectangular hole aspect ratio: 12μm: 2μm, the number of holes is 60000, the material of the spinneret is alloy, the weight ratio of the alloy material is: gold: platinum: rhodium: 50:48:2; the number of holes in a single spinneret of the spinneret is 200 -1000 holes, the total number of holes in the combined spinneret is 20000-50000 holes.

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Abstract

A method for producing flat viscose fibers and a spinneret used in the production process. The flat viscose short fibers use cotton, wood, and bamboo pulp as raw materials. The method includes the following steps: preparing alkali cellulose, preparing spun Silk stock solution, preparation of spinning bath, preparation of primary filaments, drafting, cutting, post-processing. The spinneret used in the production process is a rectangular orifice combination spinneret, which is a ring structure as a whole, and the shape of the nozzle hole of the spinneret cap is rectangular. The invention adopts the combined spinneret with special arrangement of rectangular holes, adjusts the process parameters of spinning stock solution and spinning bath and adjusts the drafting distribution. The fabric made of 25-150mm flat viscose staple fiber has obvious thermal insulation effect and is comfortable to wear, especially suitable for winter underwear. The 3-15mm ultra-short flat viscose fiber can be used to make sanitary napkins or paper products, which can be washed away in water after use. It is a flush-and-disperse type, which reduces the amount of water used for washing and accelerates the degradation process. Products for both uses are superior to existing products.

Description

technical field [0001] The invention relates to a production method of viscose fiber and a spinneret for producing viscose fiber, in particular to a production method and production process of producing flat viscose staple fiber with cotton, wood and bamboo pulp as main raw materials Spinnerets used in . Background technique [0002] Ordinary viscose staple fiber produced from cotton, wood, and bamboo pulp is the most important regenerated cellulose fiber. It has good wearability and a wide range of applications. The cross-section of conventional products is generally irregular and circular with corrugated edges. This kind of viscose staple fiber with irregular circular cross-section has poor thermal insulation effect, and the non-woven products are poor in water dispersal effect, and the market is getting more and more depressed. [0003] In view of the defects of viscose short fibers with irregular circular cross-sections, because the raw materials of viscose fibers made ...

Claims

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Application Information

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IPC IPC(8): D01F2/08D01D5/06D01D5/253
Inventor 张会平于捍江么志高高悦赵秀媛孙郑军郑会廷刘辉陈冲李胜国韦吉伦
Owner 唐山三友集团兴达化纤有限公司