CN100392162C

CN100392162C - Method for making acrylic fibre by fine denier dry method and spinning nozzle

Info

Publication number: CN100392162C
Application number: CNB2005100612916A
Authority: CN
Inventors: 姚家华; 张宇飞; 马洪波; 丁国伟; 孙涛; 黄志强
Original assignee: ZHEJIANG JINYONG ACRYLIC CO Ltd
Current assignee: ZHEJIANG JINYONG ACRYLIC CO Ltd
Priority date: 2005-10-28
Filing date: 2005-10-28
Publication date: 2008-06-04
Anticipated expiration: 2025-10-28
Also published as: CN1752301A

Abstract

The present invention relates to a method for making a fine denier dry acrylic fiber and a spinneret plate, which optimizes and properly adjusts the technological conditions of the original du pont dry spinning acrylic fibers, for example, the temperature difference of the inside temperature and the outside temperature of the raw liquor is properly enlarged, the temperature and the flow quantity of nitrogen, water washing temperature, drawing multiple and drawing speed are reasonably controlled, cotton type oil solution is used for adding oil, etc.; the spinneret plate with high-density holes is designed reasonably; the selected hole number of the spinneret plate is from 3600 to 4400, the hole diameter is from 0.09mm to 0.13mm, and the holes are arranged and distributed on 15 to 21 concentric circles; the performance of the fine denier dry acrylic fiber made in industrialization can achieve the level of the same kind of foreign products and can replace imported products, and the corridor output rate can be enhanced by 20 % to 30 %. In a fabric style, the fine denier dry acrylic fiber can not be replaced by a wet thin denier acrylic fiber, and products made from the fine denier dry acrylic fiber are obviously superior to the products made from wet acrylic fibers in quality and performance, and have high product added value. The products can satisfy various requirements of users and fill the blank of fine denier dry acrylic products in China.

Description

The preparation method of acrylic fibre by fine denier dry

Technical field

The present invention relates to a kind of preparation method of dry acrylic fiber fiber, particularly a kind ofly make the preparation method that fiber number is the acrylic fibre by fine denier dry of 0.6～1.32dtex.

Background technology

Along with growth in the living standard, people pursue the stylishness of dress ornament day by day, adapt to new trend and the wearing comfortableness and the flexibility of world's dress development.In various fibrous materials, especially thin dawn acrylic fiber is soft, the intensity height, gloss is soft, hygroscopicity doubles than common acrylic fibers, the fabric of making has the natural feel of real silk, frivolous softness, gas permeability, drapability is good, and its ductility, gorgeous other fiber that all is better than of simulate wool and color and luster light, the most suitable products such as imitating the silk top-grade fashion of doing, and the raw material of making high grade yarn is made knitted fabric, woven fabric, but the production of domestic thin dawn acrylic fiber also only is confined to wet processing at present, on quality and price, also can't compete, so present domestic used most of raw material dependence on import still with external product.

80～nineties of last century only can be made the acrylic fiber that fiber number is 1.32～11.11dtex from Du Pont's dry spinning acrylic fiber manufacture craft that the U.S. introduces, and can't produce acrylic fibre by fine denier dry, satisfies requirements of different users.

Summary of the invention

Technical problem to be solved by this invention is: the preparation method that a kind of acrylic fibre by fine denier dry is provided, optimize and suitably adjust the process conditions and the parameter of former Du Pont dry spinning acrylic fibers, but make acrylic fibre by fine denier dry with the method suitability for industrialized production, be used to make high-grade fabric, super soft fur etc., for apparel industry and each industrial field provide the substitute products of upgrading, and the substituting import one product uses fully.

The present invention addresses the above problem the technical scheme that is adopted: the preparation method of acrylic fibre by fine denier dry: may further comprise the steps:

A), spinning technique: with polyacrylonitrile dry powder is raw material, with the dimethyl formamide is solvent, be mixed with concentration and be 30～35% polymer dope, the formation monofilament is extruded the hole from spinnerets in heater via heating back, the inboard temperature of heater is controlled at 130～140 ℃, temperature outside is at 118～128 ℃, the path temperature is 310～380 ℃ of visor oven temperature, degree from top to bottom, the cone temperature is at 210～270 ℃, last path upper temp is at 190～240 ℃, last path temperature of lower is at 160～210 ℃, nitrogen temperature is at 330～400 ℃, and nitrogen pressure is at 3～4kpa, and the path productive rate is at 30～50kg/h, and spray tow with the cold rare solvent of dimethyl formamide that contains at path outlet spray place, make as-spun fibre.

B), washing, drawing-off: with the as-spun fibre of making, be controlled at 84～96 ℃ through drawing machine tank temperature, drafting multiple is controlled at 4～6.5 times, and draft speed is 500～1000rpm.

C), oil, curl: will wash cotton type finish on the tow after the drawing-off, the rotating speed that oils is 60～90rpm, curling pressure of top roll is controlled at 0.35～0.45Mpa, and the lower roll Pressure control of curling is moved under the process conditions of 0.20～0.30Mpa, barrelling after cooling is carried.

D), oven dry: above-mentioned tow is carried out secondary oil, be cut into the fiber of user's Len req through cutting machine, send into drying machine, drying machine decatize boots steam flow is controlled at 1200～2000kg/h, baking temperature is controlled at 110～140 ℃, makes acrylic fibre by fine denier dry.

Compared with prior art, the invention has the advantages that: 1, Du Pont's dry acrylic fiber fibre spinning molding condition and the forming technology to former introduction is optimized, and choose reasonable, suitable adjusting process parameter, because of technological parameter the spinning production process of fine count fiber is had very important, or even conclusive effect.Suitably strengthen the temperature difference of stoste inside/outside side temperature, and rationally control nitrogen temperature and flow, washing temperature and drafting multiple and speed oil with cotton type finish, make fiber more soft, better spinnability is arranged, produce the fine count fiber that filament number is 1.00dtex under these process conditions, it spins a good stability, and fibre defect is low, average out to 16mg/100g, and the path productive rate of fine count fiber has improved 20～30% than the 1.67dtex product that former Du Pont technology can provide.And product has super gentle ultraphotic characteristics, feel is obviously improved, performance reaches external like product level, alternative import, the thin dawn acrylic fibers of dry method have the irreplaceable characteristics of the thin dawn acrylic fiber of wet method again on Fabric Style in addition, have soft, resilience, bulkiness, spreadability, hydrophobicity is good, advantages such as gloss gracefulness, therefore with the product of the thin dawn acrylic fiber production process of dry method in quality, obviously be better than the product that wet spinning acrylic fiber is produced on the performance, the high product added value is arranged, can satisfy various requirements of different users, have certain economic benefits, filled up the blank of domestic thin dawn dry acrylic fiber product.

2, for obtaining higher spinning shaft productive rate, appropriate design the spinnerets in high density hole, main by arrangement design to spinnerets hole count, aperture, hole, allow the spinneret orifice spacing of spinnerets inner edge greater than the outside pitch of holes, the ring solvent is easily to external diffusion, volatilization in making, it is good that quality is produced in assurance, and every index all can satisfy the acrylic fibre by fine denier dry of customer requirements.

The specific embodiment

With the production fiber number is that the dry acrylic fiber fiber of 1.00dtex is embodiment, may further comprise the steps:

A), spinning technique: with polyacrylonitrile dry powder is raw material, with the dimethyl formamide is solvent, be mixed with concentration and be 33 ± 1% polymer dope, the formation monofilament is extruded the high density hole from spinnerets in heater via heating back, the inboard temperature of heater is controlled at 135 ± 1 ℃, temperature outside is controlled at 123 ± 1 ℃, the path temperature is 330 ± 10 ℃ of visor oven temperature, degree from top to bottom, the cone temperature is at 240 ± 10 ℃, last path upper temp is at 210 ± 10 ℃, last path temperature of lower is at 180 ± 10 ℃, nitrogen temperature is at 370 ± 10 ℃, and nitrogen pressure is at 3～4kpa, and the path productive rate is at 42 ± 1kg/h, and at the spray place with the cold rare solvent spray of the dimethyl formamide tow that contains, make as-spun fibre.

B), washing, drawing-off: with the as-spun fibre of making, be controlled at 85～95 ℃ through drawing machine tank temperature, drafting multiple is controlled at 5～6 times, and draft speed is 550 ± 30rpm.

C), oil, curl: will wash cotton type finish on the tow after the drawing-off, the rotating speed that oils is 65 ± 2rpm, curling pressure of top roll is controlled at 0.4 ± 0.02Mpa, and the lower roll Pressure control of curling is moved under the process conditions of 0.25 ± 0.02Mpa, barrelling after cooling is carried.

D), oven dry: above-mentioned tow secondary is oiled, adjust fibrous inside tension force, reduce the fiber own wt, be cut into the fiber of user's Len req through cutting machine, send into drying machine, drying machine decatize boots steam flow is controlled at 1500～2000kg/h, and baking temperature is controlled at 115～135 ℃, makes acrylic fibre by fine denier dry.

Claims

1. the preparation method of an acrylic fibre by fine denier dry is characterized in that, may further comprise the steps:

A), spinning technique: with polyacrylonitrile dry powder is raw material, with the dimethyl formamide is solvent, be mixed with concentration and be 30～35% polymer dope, the formation monofilament is extruded the high density hole from spinnerets in heater via heating back, the inboard temperature of heater is controlled at 130～140 ℃, temperature outside is at 118～128 ℃, the path temperature is 310～380 ℃ of visor oven temperature, degree from top to bottom, the cone temperature is at 210～270 ℃, last path upper temp is at 190～240 ℃, last path temperature of lower is at 160～210 ℃, nitrogen temperature is at 330～400 ℃, and nitrogen pressure is at 3～4kpa, and the path productive rate is at 30～50kg/h, and spray tow with the cold rare solvent of dimethyl formamide that contains at path outlet spray place, make as-spun fibre;

B), washing, drawing-off: with the as-spun fibre of making, be controlled at 84～96 ℃ through drawing machine tank temperature, drafting multiple is controlled at 4～6.5 times, and draft speed is 500～1000rpm;

C), oil, curl: will wash cotton type finish on the tow after the drawing-off, the rotating speed that oils is 60～90rpm, curling pressure of top roll is controlled at 0.35～0.45Mpa, and the lower roll Pressure control of curling is moved under the process conditions of 0.20～0.30Mpa, barrelling after cooling is carried;

2. the preparation method of acrylic fibre by fine denier dry according to claim 1 is characterized in that the inboard temperature of heater is controlled at 135 ± 1 ℃, and temperature outside is at 123 ± 1 ℃, and nitrogen temperature is at 370 ± 10 ℃, and the path productive rate is at 42 ± 1kg/h.

3. the preparation method of acrylic fibre by fine denier dry according to claim 1, it is characterized in that drafting multiple is controlled at 5～6 times, draft speed is 550 ± 30rpm, the rotating speed that oils is 65 ± 2rpm, curling pressure of top roll is controlled at 0.4 ± 0.02Mpa, and the lower roll Pressure control of curling is at 0.25 ± 0.02Mpa.

4. the preparation method of acrylic fibre by fine denier dry according to claim 1 is characterized in that steam flow is controlled at 1500～2000kg/h, and baking temperature is controlled at 115～135 ℃.