Unlock instant, AI-driven research and patent intelligence for your innovation.

A kind of production method of dry process flat acrylic fiber

A production method and flat technology, applied in filament/thread forming, fiber processing, textile and paper making, etc., can solve the problems of fiber lack of flexibility, brittleness, difficulty in dyeing, etc., achieve high added value, prevent loss, and facilitate adjustment Effect

Active Publication Date: 2019-03-29
CHINA PETROLEUM & CHEM CORP
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although acrylic fibers are usually called polyacrylonitrile fibers, acrylonitrile (customarily called the first monomer) only accounts for 90%~94%, the second monomer accounts for 5%~8%, and the third monomer accounts for 0.3%~2%. %, this is due to the lack of flexibility and brittleness of fibers made of a single acrylonitrile polymer
It is also very difficult to dye

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of production method of dry process flat acrylic fiber
  • A kind of production method of dry process flat acrylic fiber
  • A kind of production method of dry process flat acrylic fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Such as Figure 1~2 As shown: the spinneret 1 used to produce dry-process acrylic flat fibers is provided with a plurality of spinneret holes 2 at intervals, and the spinneret holes 2 are blind holes arranged on the feeding side of the spinneret 1, and the spinneret holes The bottom of 2 is provided with a plurality of micropores 3 that run through the discharge side of the spinneret 1, and the raw material forms flat acrylic fibers after being sprayed out through the spinneret holes 2 and micropores 3 on the spinneret 1.

[0046] Both the inner edge and the outer edge of the spinneret 1 are provided with upward continuous flanges, and the flanges and the bottom surface of the spinneret 1 are perpendicular to each other. The flange of the outer edge is provided with an outward turning edge away from the center of the spinneret 1, the flange of the inner edge is provided with an outward turning edge facing the center of the spinneret 1 circle, and the outer edge of the o...

Embodiment 2

[0070] The production method that is used to produce dry process acrylic flat fiber comprises the steps:

[0071] 1. Raw liquid heating;

[0072] The heater heats the raw liquid through steam and heats it up to 120°C. The heater is a radiation heater. The inner tube and outer tube of the radiation heater are heated by steam with different pressures. The pressure of the steam in the inner tube is 156kpa, and the steam in the outer tube is The pressure is 56kpa, which can make the pressure of the stock solution of the inner and outer rings different, the pressure reaching the spinneret 1 is different, and the pressure ejected from the spinneret 1 is also different, so that the speed in the tunnel is different, which can ensure The stock solution sprayed out through the spinneret 1 passes through the spinneret 1 and evaporates in the tunnel to obtain the same speed as the nascent fiber.

[0073] The heated raw liquid is transported into the filter press, and is filtered through ...

Embodiment 3

[0086] The production method that is used to produce dry process acrylic flat fiber comprises the steps:

[0087] 1. Raw liquid heating;

[0088] The heater heats the raw liquid through steam and heats it to 130°C. The heater is a radiant heater. The inner tube and outer tube of the radiant heater are heated by steam with different pressures. The pressure of the inner tube steam is 176kpa, and the outer tube steam The pressure is 86kpa, which can make the pressure of the stock solution of the inner and outer rings different, the pressure reaching the spinneret 1 is different, and the pressure ejected from the spinneret 1 is also different, so that the speed in the tunnel is different, which can ensure The stock solution sprayed out through the spinneret 1 passes through the spinneret 1 and evaporates in the tunnel to obtain the same speed as the nascent fiber.

[0089] The heated raw liquid is transported into the filter press, and is filtered through the filter press, and th...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A dry-type production method for flat acrylic fibers belongs to the technical field of preparation methods for acrylic fibers. The method is characterized by comprising the steps that a heater is used to heat an original solution, and the heated original solution is filtered; a booster pump pressurizes the filtered original solution, and the filtered original solution passes through a metering device and is then conveyed to a spinneret plate (1) for spinning jetting; the original solution jetted by the spinneret plate (1) enters a paved path and evaporates rapidly under effects of high-temperature gas fed into the paved path, so nascent fibers with a flat cross section are formed; the nascent fibers are rinsed and drafted, and then the acrylic fibers are obtained, wherein the drafting temperature is between 65 DEG C and 99 DEG C; and the drafted acrylic fibers are dried and cut down, and are then packaged and put in storage. The dry-type production method for the flat acrylic fibers provided by the invention is characterized in that the spinneret plate can be used to produce the acrylic fibers with flatness of 5-7 stably; differentiated varieties are added; and the produced flat acrylic fiber product has high addition values as well as high economic and social benefits.

Description

technical field [0001] The invention discloses a method for producing flat acrylic fibers by dry process, which belongs to the technical field of preparation methods of acrylic fibers, and in particular relates to a method for producing flat acrylic fibers by dry process. Background technique [0002] Acrylic fiber is the trade name of polyacrylonitrile limit in our country. Acrylic fiber has excellent performance, soft and warm hand feeling, good elasticity, and excellent light resistance and weather resistance. Acrylic fibers are generally made into short fibers, which can be spun purely or blended with wool, and are used to make textiles, knitwear, blankets, tents, curtains and filter cloths. Because of its properties close to wool, it is called "synthetic wool". [0003] Although acrylic fibers are usually called polyacrylonitrile fibers, acrylonitrile (customarily called the first monomer) only accounts for 90%~94%, the second monomer accounts for 5%~8%, and the third m...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): D01D5/253D01D1/09D01F6/40
CPCD01D1/09D01D5/253D01F6/40
Inventor 徐越赵敏李胸有李志强王世峡成强
Owner CHINA PETROLEUM & CHEM CORP