JPS6112953A - Knitted fabric having shape holdability - 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 Field of Industrial Application The present invention relates to a woven or knitted fabric with excellent shape retention.

Background Art Woven and knitted fabrics (hereinafter sometimes referred to as knitted fabrics) made of natural fibers or synthetic fibers have a flexible texture and are structures with excellent drapability. It is not possible to bend or fold it into the form of ``Zonoma\'' and keep it in its original form. Therefore, in order to impart shape retention to knitted fabrics, a method is known in which a material with excellent shape retention, such as wire, is woven into knitted fabrics.

Problems to be Solved by the Invention When a foreign material such as wire is woven into a knitted fabric, the alignment between the wire and fiber is poor, resulting in poor alignment between the i81 weaves and misalignment. The structure of the knitted fabric tends to collapse, and this drawback is particularly noticeable in the case of a knitted fabric with a coarse structure.

Further, there are disadvantages such as the texture of the knitted fabric becoming rough and hard, and the fact that uniform dyeing cannot be obtained since wire-like materials generally cannot be dyed. The object of the present invention is to provide a knitted fabric with excellent shape retention without the above-mentioned drawbacks. It's true.

Means for Solving the Problems As a result of intensive research in order to solve the above problems, the inventor of the present invention found that
40wt of thermoplastic fibers containing 40wt% or more of thermoplastic fibers
% or more of the spun yarn used in the covering, or the spun yarn used in the interweaving or the spun yarn used in the interweaving. The present invention was completed based on the knowledge that the desired objective can be achieved by heat treatment at a temperature higher than the melting point of the thermoplastic fibers that constitute the composition.

Function In the present invention, the spun yarn used for the purpose of covering and the thermoplastic fibers constituting the spun yarn used for the purpose of interweaving with the covering yarn are both made of thermoplastic resin that softens and melts when heated, and melts between the fibers by heat treatment. N1. It is true. Examples of such fibers include polypropylene fibers, polyethylene fibers, low melting point polyester fibers, and polyvinyl chloride fibers. Furthermore, composite fibers made of thermoplastic resins with different melting points, such as composite fibers made of polypropylene and polyethylene (trade name: Chisso Polypro ES), composite fibers made of polypropylene and ethylene-vinyl acetate copolymer (trade name: Chisso Polypro EA), etc. ) can be exemplified as fibers preferably used in the present invention.

The above-mentioned thermoplastic fibers used for the spun yarn for covering and those used for the spun yarn for interlacing and weaving may be of the same type or different types, but the heat treatment described below is performed under relatively mild conditions. Therefore, in order to obtain a product that is soft to the touch and has sufficient interfiber adhesion, it is preferable to use the same kind of fibers.

Furthermore, if the amount of thermoplastic fibers in the spun yarn is less than 40 wt%, the eye-locking effect due to heat fusion will be insufficient.

Other fibers used in combination with the thermoplastic fibers in the spun yarn include natural fibers such as cotton, linen, and silk, and synthetic fibers such as polyester, polyamide, and cellulose acetate.

A fibrous material with excellent shape retention refers to a fibrous material that deforms when force is applied to it, and then retains its shape after the deformation when the force is released. Examples include wires such as iron, copper, and aluminum. The material, thickness, etc. can be selected as appropriate depending on the application. As a method for covering a fibrous material with excellent shape retention using the covering spun yarn, a method for manufacturing ordinary covering yarns such as rubber strings can be used. The reason why the covering yarn obtained in this way is arranged to be 5% or more of the number of yarns constituting the knitted fabric is that if the covering yarn is less than 5%, the shape retention of the knitted fabric will be insufficient, and the This is because in order to provide shape retention, thick or hard covering yarn must be used, resulting in a coarse and hard knitted fabric.

There is one reason why a knitted fabric consisting only of covering yarn or a covering yarn and the above-mentioned spun yarn for interwoven knitting and weaving is heat-treated at a temperature higher than the melting point of the thermoplastic fibers constituting the spun covering yarn or the spun yarn for interwoven knitting and weaving. The purpose of this method is to strengthen the stiffness of knitted fabrics by the fusion between thermoplastic fibers within the spun yarns, and also between the covering yarns, between the covering yarns and the spun yarns for mixed knitting and weaving, and the spun yarns for mixed knitting and weaving. The purpose is to prevent deformation and misalignment of the knitted fabric structure by fusing between the two. Heat treatment can be carried out by bringing the knitted fabric into contact with a plurality of heated rolls or by passing it between calender rolls, and the conditions such as heating temperature, contact pressure, heating time, etc. are determined as appropriate depending on the properties required of the knitted fabric. It will be adjusted.

EXAMPLES The present invention will be specifically explained using three examples of its embodiments.

Example 1 Composite fiber made of polypropylene and polyethylene (trade name: Chisso Polypro ES) (1.5d x 51ff)
) 60wt% and polyester fiber (1', 5d
516) 20 obtained by mixed spinning with 40 wt%
47 mild steel wire (0,05
ffφ) was covered to obtain a covered yarn (4).

A plain weave with a warp of 20 threads/25 mm and a weft of 20 threads/25 MM was made using the covering thread, and the melting point of polyethylene (1
Melting point of polypropylene (160°C)
Calendar roll heated to 140°C (pressure 5
kq/compensation) was passed through and heat treated. The resulting fabric has the surface of the mild steel wire completely covered with composite fibers, has the feel of a normal fabric, has a stiff waist, and can be freely deformed by applying force with your fingers. When the force is released, it retains its original shape, and has an appropriate function, for example, as a hair curler for women.

Example 2 Composite fiber (2d
51 ff) Using a spun yarn with a cotton count of 4o/1 obtained by spinning a mixture of 40 wt% and 6 wt% cotton,
A covering thread (B) was obtained by covering soft steel of No. 0.0251 fllφ. As the warp, two strands of the above spun yarn (40/2) per one covering yarn)
7 equally spaced at a ratio of 9 7, using the above 2-strand yarn (40/2) as the weft, 35 warp / 25 tg
The fabric was made into a plain weave fabric with 30 wefts/25 fl, and was heat-treated by passing through a 150''r3 calender roll (pressure: 5 kti/cm), which is higher than the melting point of low melting point polyester.

This fabric has the texture of a cotton-polyester blend fabric,
When force is applied, it deforms freely, and when force is released, it maintains its original form.When using this fabric as a bandage, there is no generation of thread waste from the cut section, and the end of the roll is stopped. It does not come undone even without treatment, and the tightness can be freely controlled, making it highly functional.

Example 3 Composite fiber consisting of polypropylene and polyethylene (trade name: Chinpolypro ES) (1.5d x 5)
A covering yarn (0) was obtained by covering No. 50 mild steel (Q, Q25wφ) using a 24/1 cotton count spun yarn consisting only of KM.
Wale/25η, 23.5 courses/25 mackerel plain knitted fabric, calender roll heated to 140°C (pressure 5kQ)
/Ce1l) was passed through and heat treated. The resulting knitted fabric has the surface of the mild steel wire completely covered with composite fibers, has the feel of a normal knitted fabric, and has a stiff waist that allows it to be freely deformed by applying force with the fingers. , which retains its original form when its power is released; computers,
It has excellent functionality as a cover material for word processors, CRTs, etc., having both shape retention and conductivity.

Effects of the present invention It has the same touch and texture as conventional knitted fabrics, and
! The present invention provides a novel knitted fabric whose structure is stable and stiff, and which can hold any given shape.

Claims (1)

[Claims] 1) Covering yarn obtained by covering a fibrous material with excellent shape retention using a spun yarn containing 40 wt% or more of thermoplastic fibers, and a spun yarn containing 40 wt% or more of thermoplastic fibers. A knitted fabric in which yarns are arranged to account for 5% or more of the number of yarns constituting the knitted fabric is heat-treated at a temperature higher than the melting point of the thermoplastic fibers constituting the spun yarn used for covering or the spun yarn used for interweaving or interweaving. A knitted fabric with shape retention obtained by