Method to form yarn via film fiberizing spinning

• US 20180216254A1
• Filed: 03/27/2018
• Published: 08/02/2018
• Est. Priority Date: 05/11/2017
• Status: Active Grant

• Current Assignee: Wuhan Textile University
• Original Assignee: Wuhan Textile University
• Inventors: Xu, Weilin, Xia, Zhigang, Liu, Xin
• Granted Patent: US 10,640,889 B2
• Time in Patent Office: Days
• CPC Class Codes: B26D 1/225 for thin material, e.g. for sheets, strips or the like
• CPC Class Codes: D01D 10/02 Heat treatment heating for finishing D02J13/00
• CPC Class Codes: D01D 5/16 using rollers, or like mechanical devices, e.g. snubbing pins
• CPC Class Codes: D01D 5/426 by cutting films
• CPC Class Codes: D01H 1/02 ring type arrangements with two or more spinning or twisting devices in combination D01H7/90
• CPC Class Codes: D02G 3/06 Threads formed from strip material other than paper

Abstract

A method to form yarn via film fiberizing spinning belongs to a textile technical field. A film cutting device is arranged behind each drafting system on a ring frame, whose cut resistance apron and cutting roller engage with each other to form a cutting zone to cut and fiberize the film to get belt-like multi-filaments. Then the multi-filament formed passes through the first, second and third drafting zones in sequence for drawing, in such a manner that the multi-filament molecular orientation and crystallization are improved. After being drafted, the multi-filaments are twisted into yarn by ring spinning, which provides a novel high-efficient and short-processing way of producing yarns of nano-micro fibers using films instead of conventional nano-spun fibers such as electro- and centrifugal spun fibers, thereby breaking restriction of “low bulk and low-speed production of nano-spun fibers” and integrating the film industry with the textile industry.

Claims

1. A method to form yarn via film fiberizing spinning, comprising steps of:

arranging a film cutting device behind each drafting system on a ring frame, wherein the drafting system comprises a rear roller (8), a rear rubber roller (7), a middle roller (11), a middle rubber roller (10), a front roller (14), and a front rubber roller (13);

the film cutting device comprises a bearing roller (16), an unwinding roller (4) and a cutting roller (5);

a cut resistance apron (3) is wrapped onto the unwinding roller (4);

loop blades, which are arranged in parallel, are located on the cutting roller (5) circumference;

the cut resistance apron (3) corresponds to cutter edges of the loop blades located on the cutting roller (5);

a cutting zone is formed between the cut resistance apron (3) and the cutting roller (5);

centers of the cutting zone, the rear rubber roller (7), the middle rubber roller (10) and the front rubber roller (13) are in a same plane;

the rear rubber roller (7) and the rear roller (8) of the drafting system engage with each other to form a rear roller nip;

a first drafting zone is formed between the cutting zone and the rear roller nip;

a filament guider (6) is provided in the first drafting zone;

an extended line of an input end of a guiding tunnel of the filament guider (6) is tangent with the cutting zone;

an extended line of an output end of the guiding tunnel of the filament guider (6) is tangent with the rear rubber roller (7) at the rear roller nip;

the middle roller (11) and the middle rubber roller (10) of the drafting system engage with each other to form a middle roller nip;

a second drafting zone is formed between the rear roller nip and the middle roller nip;

a first heater (9) is provided in the second drafting zone;

a heating groove of the first heater (9) is parallel to an axis of the rear roller nip and an axis of the middle roller nip;

the front roller (14) and the front rubber roller (13) engage with each other to form a front roller nip;

a third drafting zone is formed between the middle roller nip and the front roller nip;

a second heater (12) is provided in the second drafting zone;

a heating groove of the second heater (12) is parallel to the axis of the middle roller nip and an axis of the front roller nip;

during spinning, placing a film roll (1) between the bearing roller (16) and the unwinding roller (4), wherein films unwound from the film roll (1) enter the cutting zone formed between the cut resistance apron (3) and the unwinding roller (4);

the film cutting device cuts and fiberizes the films to form belt-like multi-filament which are evenly paved before entering the first drafting zone, wherein the multi-filaments get a primary drawing;

after the primary drawing, the multi-filaments outputting from the rear roller nip via the filament guider (6) enter the second drafting zone, wherein the multi-filaments heated in the heating groove of the first heater (9) get a secondary drawing;

after the secondary drawing the multi-filaments outputting from the middle roller nip enter the third drafting zone, wherein the multi-filaments heated in the heating groove of the second heater (12) get a main drawing;

after the main drawing, the multi-filaments outputting from the front roller nip are converged and twisted to form a yarn, subsequently the yarn passes through a pig-tail guider (15) of yarn, a ring and a traveler successively, and is finally winding onto a yarn bobbin.

2. The method to form the yarn via the film fiberizing spinning, as recited in claim 1, wherein the cut resistance apron (3) is made of ultra-high-strength polyethylene, aramid, or super high-strength rubber.

3. The method to form the yarn via the film fiberizing spinning, as recited in claim 1, wherein a distance between cutter edges of adjacent loop blades is ranged from 0.1 mm to 3 mm.