JPS5994658A - Production of nonwoven fabric - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION This method applies to the manufacturing method of fabric made of thin fibers of 1 denier or less.

) 4 years ago, 51 f per 1 h, the shift to soft, high-strength nonwoven fabrics has increased by 1 (6 o).For example, in the field of clothing, as outer materials become thinner, interlining materials also become thinner. ,...7, soft and high strength materials are required.

Conventionally, nonwoven fabrics made of short single fibers are generally 1.5 denier, but nonwoven fabrics made of soft and high strength
They tried to make cloth, but they encountered various problems. In other words, when the fibers wrap around the cylinder of the opening machine,
ni'-(fKO or so-called NEP occurs,
The problem is that the web is easily disturbed due to the shadow of static air on the web and the wind pressure generated from the cylinder of the opening machine. In this way, it was difficult to create a uniform web from fibers of 1 denier or less. Therefore, the number of rotations of the cylinder of the opening machine, the gauge gap, etc. are adjusted, and the temperature and humidity inside the work chamber are adjusted. However, these adjustments must be made on a case-by-case basis, and even after such adjustments are made, a large amount of neps may suddenly occur or the cylinder may become wrapped around the cylinder. First, it was necessary to stop the machine, clean the cylinder, and then re-adjust it, which was a complicated process, making it inefficient and low in productivity.

In order to overcome these problems, the inventors of the present invention have made extensive research, and have achieved the present invention by using a conventional fiber opening machine and solving process problems. be.

In other words, the present invention uses a plurality of single fibers of 1 denier or less,
After forming a fiber web using bundled fibers that are bundled with a water-soluble binder and cut into non-ohm fibers, a jet water stream is applied to entangle the web and dissolve the binder to form single fibers. This is a method for producing a nonwoven fabric characterized by the following steps:

In the present invention, the single fiber of 1 denier or less may be any of synthetic fibers, semi-synthetic wood fibers, recycled fibers, and inorganic fibers, and the single fiber of 1 denier or less obtained by stretching the spun fiber A plurality of single fibers are aligned, a water-soluble binder is applied to them, they are bundled, and they are cut into short fibers to obtain substitute fibers in the bundled salt.

The thickness of the focused consciousness 1.1 t obtained in this way is 1 denier or more, preferably 1.5 denier or more. Furthermore, if desired, ordinary short fibers of 1 denier or more may be mixed into the cotton.

In addition, the length of the gathering seat fiber is about 25 or more, preferably about 3
It is 8 horses to about 1001jfM. If the thickness is less than 1 denier or the length is less than 25 m1, it is difficult to obtain a sufficiently uniform web using conventional open-hole webs.

The water-soluble binder used in the present invention may be one that is generally used as a sizing agent, such as polyvinyl alcohol, carboxymethyl cellulose, starch, etc.
1. It dissolves in warm or hot water. Bye.

In addition, after these single fibers are bundled, various oils may be added to the fibers to improve their opening properties, or mechanical or chemical crimp may be applied to the fibers. It goes without saying that II may be applied.

The bundled bean fiber obtained in this way! : A fiber web is formed using a fiber opening machine using lfj, but it is possible to make any web from low weight to high weight. - Depending on the condition, even if the web R4 is made of ordinary short fibers of 1 denier or more, it will be more than 4 layers. , the web is entangled by a water jet application device.

As a jet water flow application device, the diameter is approximately 0.1 to 0.3.
Uses a nozzle with small gate holes arranged in series.

By discharging a high pressure water stream of about 10 to 70%,
The web can be intertwined.

Furthermore, the high-pressure water stream discharged from the nozzle entangles the web 7f and dissolves the binder used to bundle the single fibers. In this case, depending on the solubility of the water-soluble binder, the water may be at room temperature, hot water or hot water.

In this way, 24) East Pai fibers (L web become entangled single ((2(r(+)) and an overall dense and uniform nep-free IL web is obtained. If the web is dehydrated and dried, it will become extremely soft, which cannot be obtained from conventional thick-neel fR webs.
A nonwoven fabric with a strength of 1゛b can be efficiently obtained. That is, 20
g/m'~4011/rr? Despite its low weight, it has a large number of single fibers per unit area, so it has high strength and a soft texture. These include the comfort of clothing, sanitary materials,
It is also useful as a tape base material, wound dressing material, etc.

Example: Five lengths of 0.5 denier vinylon U2 It was then dried and concentrated into 1.5 denier paper. After this was crimped, it was cut into 3B openings to obtain bundled short fibers. This is passed through a known fiber opening machine to form a web, which is laminated and placed on a wire mesh conveyor weighing 20 g.
A web of y♀ was formed. This has a caliber of 0.1! Mi, 60℃ from a nozzle with a series orifice with a pitch of 1m.
Then, a jet water stream with a water pressure of 25~ was discharged to carry out an entanglement treatment and dissolve the polyvinyl alcohol binder. When the obtained sheet-like material was dehydrated and dried, an extremely soft and high-strength nonwoven fabric was obtained, which was suitable as a blouse core for clothing.

2 0.7 denier polyester long fibers were bundled into three pieces,
It was made into a long fiber of about 2 denier, impregnated with a 2.5% aqueous solution of JP-1800 (polyvinyl alcohol manufactured by Unitika Kasei Ni), and dried. This was cut into 38 pieces, and the short fibers were spread through a fiber opening machine to form a web of 25 jj/m'. Place this web on a wire mesh conveyor and
．． A nozzle having an orifice of 2 mm and 0.8 rrm ejected a water jet stream at 85° C. and 60% water pressure to carry out the entanglement treatment and dissolve the polyvinyl alcohol as the binder. By dehydrating and drying this, a soft and high-strength nonwoven fabric could be obtained, which was ideal as a thin interlining for people's clothing.

A nonwoven fabric was obtained by entangling a 4 og/FIT' web of polyester long fibers with a ratio of 1191 rows and 1.5 denier and 3811M using a water jet.

Example 1 of the present invention. The physical properties compared with and 2 are summarized in the table.

Despite the weight of the nonwoven fabric, the tensile strength and tear strength were almost the same, and the 1.L] Lee softness was smaller and softer.

The present invention is an extremely effective method for producing high-strength nonwoven fabric using a conventional opening machine using 1 m long fibers of 1 denier or less.

(Table) (Note) ([) Total value of vertical and horizontal directions measured with Tensilon.

(Tensile speed: 100 my 7 min, chuck distance: 100 r7) (2) Total value in the vertical and horizontal directions measured by the Elmendorf method.

(3) Vertical direction A1 measured by cantilever method
α. (25IhIIIlIJ) Patent applicant Nippon Vilene Co., Ltd. Procedural amendment (white circle) December 1982-! Kazuo Wakasugi, 1-day I'F Office clerk 1 Case report No. 203143 of 1982 Title of invention Method for manufacturing non-woven fabric 3 Relationship to the extraction case Patent applicant's address Tobo 3-7-20 Nihonbashi, Chuya-ku, Tokyo (@103
)5 tlli positive content (1) Ming+! II dO) After page 7, line 15, match the following sentence. [Ma1ko4017m2~300t/
The lnz bar is made into a single fiber and has a large number of 1koni + 4" 11g fibers, and the fibers of Shikamo Jifuku, Konaru lkome, and j!12Ji are also high and have a unique texture. Insert the following sentence after line 15 on page 9 of Akira d+tM. Polyester long fiber '1 = 20 pieces were bundled to make a long fiber of approximately 14 denier, impregnated with a 2.5% hydrochloric acid solution of UP-1soG (polyvinyl alcohol manufactured by Unitika JAKK), and dried. The bundled short fibers obtained by cutting were opened to form a web of 2QQf/m2.This web was placed on a wire mesh conveyor, and the diameter Q, 2mtn, pitch Q,
A jet water stream with a water pressure of 7゜kg// is discharged at 85℃ from a nozzle with an 8tnm orifice. 4i was conducted, and the crystallization mixture polyvinyl alcohol was explained in detail.

C, +'L is treated with cursed water, and when it dries, it is extremely soft and has a suede-like finish.

Claims (1)

[Claims] A plurality of single fibers of 1 denier or less are bundled 21S on the water-soluble -1-gold side, and cut into 1 (:) using a bundle term 11'', :, 1.fl. teijN'C+ 4
& After forming the web, IJ゛ jet water flow! 1. A method for producing a non-cotton fabric, which comprises entangling the webs and dissolving the bond 1) into rlj-X':;-i'+t:.