CN111850716A

CN111850716A - Wood-like cotton fiber, spinning pack and preparation method thereof

Info

Publication number: CN111850716A
Application number: CN201910363462.2A
Authority: CN
Inventors: 冯培; 杨崇倡; 杨芊竹; 王佳林; 张荣根
Original assignee: Donghua University; Zhejiang Henglan Technology Co Ltd
Current assignee: Donghua University; Zhejiang Henglan Technology Co Ltd
Priority date: 2019-04-30
Filing date: 2019-04-30
Publication date: 2020-10-30
Anticipated expiration: 2039-04-30
Also published as: CN111850716B

Abstract

The invention discloses a wood-like cotton fiber, a spinning pack and a preparation method thereof, wherein the wood-like cotton fiber comprises a plurality of hollow sections and a plurality of flat sections, the hollow sections and the flat sections are alternately distributed, air cavities are arranged in the hollow sections, air is stored in the air cavities, the flat sections are flat, and the cross sections of the hollow sections are circular or elliptical. The hollow section of the wood-like cotton fiber enables the fiber to be more warm, and the flat section enables the fiber to have air permeability.

Description

Wood-like cotton fiber, spinning pack and preparation method thereof

Technical Field

The invention relates to a fiber, in particular to a wood-like cotton fiber, a spinning pack and a preparation method.

Background

Kapok fiber is a natural non-cotton fiber, is fruit fiber of several plants in kapok family of Malvales, belongs to single cell fiber, is attached to the inner wall of the shell of a kapok capsule, and is formed by the development and growth of inner wall cells. Generally, the length is about 8 to 32mm and the diameter is about 20 to 45 μm. The kapok fiber has a unique thin-wall large-hollow structure, the hollowness can reach 80% -97%, which is far higher than that of the traditional hollow fiber (the hollowness is about 40%), so that the kapok fiber has better heat retention property than the traditional hollow fiber, but the air permeability is poorer; the thin-wall structure of the kapok fiber is flat, so that the kapok fiber has a ventilation effect, and is warm-keeping and breathable. Is widely used for bedding, wadding of pillows, heat preservation and sound absorption materials and buoyancy materials. However, natural kapok fiber has short length, low strength, poor cohesion and poor elasticity, so that the kapok fiber is difficult to be independently spun and is often blended with cotton. It is therefore necessary to spin artificial kapok fibers.

Disclosure of Invention

In order to solve the problems, the invention provides the imitation kapok fiber which can replace the kapok fiber and can be used for garment materials. The invention also provides a spinning pack of the wood-like cotton fiber and a preparation method thereof.

In order to achieve the purpose, the wood-like cotton fiber comprises a plurality of hollow sections and a plurality of flat sections, wherein the hollow sections and the flat sections are alternately distributed, air cavities are arranged in the hollow sections, air is stored in the air cavities, the flat sections are flat, and the cross sections of the hollow sections are circular or elliptical.

Preferably, the hollow section and the flattened section are solidified from a polymer melt.

Preferably, the polymer melt is dacron. The spinneret assembly for preparing the wood-like cotton fiber is provided with a spinneret orifice and an air pipe, wherein the spinneret orifice comprises a guide hole and a spinneret micropore connected with the bottom of the guide hole, the bottom of the air pipe is provided with an air outlet, the air pipe penetrates through the guide hole and the spinneret micropore, and the air outlet is arranged at an outlet of the spinneret micropore.

According to the method for preparing the kapok-like fiber, the spinning assembly is adopted, the polymer melt is continuously introduced into the spinning holes, and air blowing is performed in the air pipe through the air blowing mechanism and air suction is performed on the air pipe through the air suction mechanism alternately.

The hollow section of the imitation kapok fiber provided by the invention enables the fiber to be more warm, the flat section enables the fiber to have air permeability, the hollow section can replace kapok fiber, the fiber length is not limited, and the imitation kapok fiber has the advantages of high strength, good cohesive force, good elasticity and the like, can be independently spun, and can be used in the fields of clothing fabrics and the like.

Drawings

FIG. 1 is a schematic structural view of a wood-like cotton fiber of the present invention;

FIG. 2 is a side view of FIG. 1;

FIG. 3 is an enlarged schematic cross-sectional view of the hollow section;

FIG. 4 is an enlarged cross-sectional view of the flattened section;

FIG. 5 is an enlarged cross-sectional view of the transition between the hollow section and the flat section;

FIG. 6 is a schematic view of a spin pack;

fig. 7 is a partially enlarged view of the area a in fig. 6.

Detailed Description

The following describes in detail a specific embodiment of the present invention with reference to the drawings.

As shown in fig. 1 to 5, the wood-like cotton fiber of the present invention includes a plurality of hollow sections 10 and a plurality of flat sections 20, wherein the hollow sections 10 and the flat sections 20 are alternately distributed, an air cavity 11 is disposed in the hollow section 10, air is stored in the air cavity 11, the flat sections 20 are flat, and the cross section of the hollow section 10 is circular or elliptical.

The hollow section 10 and the flat section 20 are solidified from a polymer melt.

The polymer melt can be terylene, polypropylene fiber and chinlon, and gas is stored in the air cavity. The polymer melt is selected from terylene. The terylene has good chemical resistance and is not afraid of mould and worm damage; the heat resistance is good, and the thermoplastic property is achieved; the elastic recovery capability is good, and the fabric is firm and durable, and is crease-resistant and easy-care; the light fastness is good, and the fabric is equivalent to acrylic fiber fabric, but the raw material is cheaper than acrylic fiber. The gas is compressed air. Compared with other gases such as nitrogen, oxygen, helium and the like, the compressed air has the advantages of low preparation cost, no raw material acquisition cost, relatively good stability and difficulty in causing dangerous accidents such as explosion and the like in the preparation and use processes of the fiber. The preparation of the compressed air adopts an air compressor, the air compressor compresses the air into airflow with certain pressure, and the function of blowing is realized after the airflow passes through an air pipe.

As shown in fig. 6 and 7, the spinning pack for preparing the wood-like cotton fiber of the present invention has a spinning hole and an air tube 200, the spinning hole includes a guide hole 301 and a spinning micropore 302 connected with the bottom of the guide hole 301, the bottom of the air tube 200 is provided with an air outlet 202, the air tube 200 penetrates through the guide hole 301 and the spinning micropore 302, and the air outlet 202 is disposed at 202 of the outlet 202 of the spinning micropore 302. The air outlet 202 is flush with the outlet of the spinning micro-hole 302 or protrudes from the outlet of the spinning micro-hole 302, that is, the air outlet 202 and the outlet of the spinning micro-hole 302 are at the same height or lower than the height of the outlet of the spinning micro-hole 302.

The air pipe 200 is fixed in the spinning pack, the air pipe 200 penetrates through the whole spinning pack, and an air inlet 201 of the air pipe 200 is positioned at the upper part of the spinning pack and is directly communicated with the air blowing mechanism and the air suction mechanism. Melt channel 100 is disposed within the spin pack assembly, and melt channel 100 is in communication with guide bore 301. The air blowing mechanism may employ an air compressor, which compresses air into a stream of air with a certain pressure and presses it into the air tube 200 when air blowing is required. The suction mechanism may be a vacuum device, which draws air from the air tube 200 and creates a negative pressure in the air tube 200 when suction is required.

According to the method for preparing the kapok-like fiber, the spinning assembly is adopted, polymer melt is continuously introduced into the spinning holes through the melt runner 100, air is blown into the air pipe 200 through the air blowing mechanism, and air suction is alternately performed on the air pipe 200 through the air suction mechanism. Blowing air into the air tube 200 to form the hollow section 10 and filling the air cavity 11 with air; inhalation of the trachea forms the flattened section 20. The length of the hollow section 10 and the flat section 20 can be controlled by controlling the time of blowing and sucking.

The raw material master batches are melted at high temperature to form a polymer melt, the polymer melt enters a spinneret orifice from a melt runner 100, the polymer melt flows out from the periphery of an air pipe 200 at an outlet of the spinneret orifice 302, when an air blowing mechanism blows air into the air pipe 200, the air is discharged from an air outlet 202 of the air pipe 200 and is filled into the middle part 202 of the polymer melt to form an air cavity in the middle of the polymer melt, and thus the hollow section 10 is formed; when the air suction mechanism sucks air into the air pipe 200, negative pressure is formed in the air pipe 200, and polymer melt flowing out of the periphery of the air pipe 200 at the outlet of the spinning micropores 302 is bonded together by the action of the negative pressure to form the flat section 20. The air blowing mechanism and the air suction mechanism alternately blow and suck air in the air pipe, so that the hollow sections 10 and the flat sections 20 are alternately distributed.

As described above, exemplary embodiments of the present invention are described in detail with reference to the accompanying drawings. It should be understood that the invention is not intended to be limited to these specific details. Equivalent or similar changes in the structure and features of the exemplary embodiments may be made without departing from the spirit and scope of the invention, which shall also fall within the scope of the protection defined by the claims appended hereto.

Claims

1. The wood-like cotton fiber is characterized by comprising a plurality of hollow sections and a plurality of flat sections, wherein the hollow sections and the flat sections are alternately distributed, air cavities are arranged in the hollow sections, air is stored in the air cavities, the flat sections are flat, and the cross sections of the hollow sections are circular or elliptical.

2. The kapok fiber of claim 1, wherein the hollow section and the flattened section are solidified from a polymer melt.

3. The wood-like cotton fiber of claim 2, wherein the polymer melt is polyester.

4. A spinneret assembly for preparing the wood-like cotton fiber according to claim 1, wherein said spinneret assembly has a spinneret hole and an air tube, said spinneret hole comprises a guide hole and spinneret micropores connected with the bottom of said guide hole, the bottom of said air tube is provided with an air outlet, said air tube penetrates said guide hole and spinneret micropores, and said air outlet is arranged at the outlet of said spinneret micropores.

5. A method for preparing the wood-like cotton fiber of claim 1, wherein the spinning pack of claim 4 is used, the polymer melt is continuously introduced into the spinning holes, and the air blowing mechanism blows air into the air pipe and the air suction mechanism sucks air into the air pipe alternately.