JPH0434051A - Pile cloth - Google Patents

Abstract

PURPOSE:To obtain the subject cloth having the same textures on the front and the back surfaces without lowering the production efficiency or generating defective products by connecting a pair of parallelly placed base cloths with a specific binding yarn and cutting both surfaces. CONSTITUTION:The objective cloth can be produced by connecting a pair of parallelly placed base cloths with an essentially non-twisted short fiber bundle and cutting both surfaces of the obtained double cloth. The binding short fiber bundle is a wrapping yarn which is a conjugate yarn composed of a core fiber having a core-constituting fiber number (n) of 100-500 and a binding yarn (preferably a polyester fiber of >=2.5g/d) consisting of continuous filament yarn wrapping the above core fibers. The weight ratio of the filament yarn to the wrapping yarn is 4-20% and the wrapping coefficient (K) of the wrapping yarn is 80-100 {K is determined by formula [T is wrapping number (T/m) and Nm is spun yarn count number in metric system]}.

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a cut pile fabric.

(Prior Art) Conventionally, a worsted spun double yarn spun by a ring spinning machine is mainly used as a pile yarn for forming a pile.

In order to maintain sufficient yarn strength during the knitting process, worsted spun twin yarns undergo single yarn twisting (called F twist) in the traveler mechanism of a ring spinning machine, and then double yarn twisting after plying the single yarns. Actual twisting is performed by this method, and the yarn is supplied as a stable yarn to the knitting process. However, since ring-spun worsted spun twin yarns with real twist are used, when the pile yarns bypassed on the back side of the base fabric are raised to form the back pile, they are significantly affected by the twist.
It was difficult to raise the hair, and it was necessary to go through the raising process many times, usually 5 times.

Furthermore, double-sided pile fabrics are made of pile yarns with sufficient yarn strength and filament yarns (usually polyester filaments) that form the base fabric (consisting of warp yarns connecting the warp knitting section and weft direction (waist stitching sections)). The filament yarn is warped and used. Knitting is done on a double raschel knitting machine (commonly called a Mayer knitting machine manufactured by Karl Mayer in West Germany). ,
The pile threads woven and held by two sets of base fabrics are cut at the center to produce two sets of single-sided pile fabrics. However, since the raising is done with excessive force, the short fibers constituting the pile yarn are cut or the fibers are damaged due to abrasion during processing. As a result, the product contains loose fibers cut from the finished product and damaged pile. The current situation is that there is a significant difference between the acicular shape of the front pile and the acicular shape of the raised pile on the back, and the shape of the back pile is poor, significantly reducing the value of the product as a double-sided pile.

(Problems to be Solved by the Invention) As a result of intensive research aimed at solving the above-mentioned problems all at once, the present inventors have found that there is no decrease in productivity during knitting and no occurrence of defective products, and no The present inventors have solved the problem by providing a spun yarn that is optimal for producing a screen pile blanket with a good pile condition, and have arrived at the next invention.

(Means for Solving the Problems) That is, the present invention provides a cut pile fabric obtained from a double fabric in which two sets of base fabrics that are parallel to each other are connected, and a core fiber that satisfies the following conditions as a connecting yarn, and a core fiber that satisfies the following conditions. A /N6 fabric made of a binding yarn that wraps the fibers and a wrapping yarn that wraps the fibers.

Core fiber: A substantially untwisted short fiber bundle, the number (n) of fibers constituting the core portion is 100 to 500.

Binding yarn: A continuous filament yarn that accounts for 4 to 20% by weight of the wrapping yarn.

Wrapping yarn: Wrapping coefficient (K) is 80 to 120, where K=T/'N.

T: Number of wrappings (T/■) N1: Metric spinning count First, the process leading to the present invention will be explained.

The twist that obtains the yarn strength of pile spun yarn required for the knitting process is usually set with a twist coefficient, and in practice, in the case of worsted spinning yarn, the single yarn twist coefficient is K = GO ~ 801 double yarn twist coefficient ni=
It is spun at 55-65. Here, the number of single yarn twists is T
It is a coefficient expressed as (T/M)" K x 'N. T: number of single yarn twists per 1 m, K: twist coefficient, Nw: metric spinning count. Double yarn twist.

t: number of double yarn twists per 1 m, R: double yarn twist coefficient.

The present inventors considered productivity during mass knitting and prevention of defective products as secondary issues, and examined the production of pile yarn under the following conditions (A) and (B).

(A) Ring with the minimum number of twists to obtain the yarn strength required for double knitting.
Traveler - Spun double yarn (B) Double knitting required yarn Strong single yarn ring Traveler
Spun yarn (usually not used due to low yarn strength) Specifically, (A): Single yarn twist coefficient = 55, double yarn twist coefficient t = 50 (B)
): A yarn with a twist coefficient of =80.

Table 1 shows the results of producing and evaluating double-sided pile blankets using these two types of yarn.

For (A), the number of naps decreased by about 15%, and an effect was observed, but no effect was observed at all on the pile shape on the back side and the difference in the shape of the front and back piles.

Regarding (B), although effects were observed on the number of times of raising, back side pile shape, and difference in front and back pile shapes, sufficient effects were not obtained. However, as a result of the above study, using single yarn and lowering the number of twists is an effective means to solve the problems in the conventional manufacturing method, which the present invention aims to solve. It has been speculated that wrapping yarn is effective as a spun yarn for piles that can solve the problems of conventional manufacturing methods, with high yield and less defective products.The wrapping yarn, which is the basis of the present invention, will now be described.

Using wrapping yarn and a hollow spindle spinning machine, the fiber bundles (core part) are arranged in a non-twisted state, and the core part using continuous filament threads (binding thread) to wrap them is substantially non-twisted. It is a composite yarn consisting of core fibers.

There are 4 to 2 binding yarns in the wrapping yarn.
It accounts for 0% by weight. If it is less than 4% by weight, the yarn strength necessary for knitting cannot be obtained, and if it exceeds 20% by weight, the texture of the fabric will be impaired due to the uneven texture difference due to dyeing with the core fiber, which is not preferable. Preferably 5-1
It is 0% by weight. The binding yarn may be made of any material as long as it is a continuous filament, but polyester fibers, such as those selected from synthetic fibers such as polyester and nylon, and recycled fibers such as rayon, are preferred. The strength of the binding yarn may be 2.5 g/d or more from the viewpoint of knitting properties.

Next, even when the above-mentioned binding yarn is used, if the wrapping coefficient (K) is less than 50, sufficient yarn strength cannot be obtained, yarn breakage occurs frequently during knitting, and knitting efficiency is significantly reduced.

When 50 < K < 80, the yarn strength necessary for knitting can be obtained, and yarn breakage due to insufficient strength will not occur, but the core part may shift from the binding yarn due to the winding process during spinning, the guide and guide bar during knitting, etc. A phenomenon called ``shigoki'' occurred, resulting in an increase in thread breakage during knitting.

The short fibers used in the core have a fiber length of 1%.

Although it is a barrier pull cut with a constant length of 2.3 and an average fiber length of 80 to 100 ■/■, if the pile length of the product is long and the fiber length used is short, the product will be short if the K is less than 80. The fiber bundle is weak, and short fibers (commonly called loose hair) fall out.

Furthermore, the lower the K, the better the napping property, but the loose hair increases. And when it exceeds 20 months, the napping properties tend to deteriorate.

Therefore, if the wrapping coefficient (K) is in the range of 80 to 120, the number of times of raising during the raising process will be less damage to the fibers due to fiber cutting and abrasion, and furthermore, the spinning operation efficiency will not be reduced (
A product with less loose hair can be obtained.

Preferably it is 80 to 100. The number (n) of short fibers constituting the core portion will be described.

For double-sided pile blankets, the pile yarns that have detoured to the back side are raised from the back side, and the short pile fibers are distributed and finished in a ratio of front: back = 1:1, making it an ideal pile blanket with one front and back.

Therefore, compared to a single-sided pile fabric or a laminated blanket of single-sided pile fabric, it is knitted using a high-gauge knitting machine and by increasing the knitting density in the direction of the knitted fabric course. However, if the short fiber denier constituting the pile yarn is thick, if the pile obtained by raising the front pile and the bypassed back side yarn is distributed in a 1:1 ratio, the pile density will inevitably become % compared to the single-sided pile fabric. Become coarse. Therefore, in order to obtain a product with a sufficient pile density with both front and back sides integrated, it is better to have more than 100 fibers, and if it exceeds 600, the pile will have poor settling properties, making it unsuitable for practical use. Therefore, n is 100~
If it is within the range of 600, the quality of the product will be excellent and the passing properties of each of spinning, knitting and finishing processes will be good. Preferably 150-350, more preferably 150-250.

As described above, an excellent double-sided pile fabric can only be obtained by satisfying all the requirements of the present invention.

l (Example) Non-shrinkage acrylic fiber (Exlan L9) 2 denyl, 76
III cut and shrink acrylic fiber (Exlan [F]
) 2 denier, 78 mm cut is passed through mixed cotton and card to make a sliver with a mixing ratio of 60:40, then roved and fed to a hollow spindle machine to make polyester filament 50d/12f as binding yarn.
Wrapping using single yarn metric count 1/18'S
N. was spun. The wrapping coefficient was 85, and the weight ratio of the binding yarn and polyester filament to the wrapping yarn was 10%. The single yarn was used as a pile yarn, and the base chain part was made of polyester 200d/48f1, and the swing part was made of acrylic fiber (exlan@>1/2B'S).
A double fabric in which two sets of parallel base fabrics were connected was fabricated by knitting using an 18CG Karl Mayer knitting machine using a spun yarn having an N-meter count. Thereafter, the center of the pile part was cut to obtain a single-sided pile fabric having two sets of piles on the surface.

The conditions of the Karl Mayer knitting machine were a kettle interval of 36 mm, a course density of 17 threads/inch, and a rotation speed of 48 Or, p, *.The single-sided pile fabric produced was 900 g/m.

Next, print dyeing is performed on the pile surface, and 10”CX
Bulky removal and dye fixation were performed simultaneously under conditions of 15 minutes. After that, it was washed with water, softened, and dried.

Next, the front pile was passed through a brushing roller twice, and then the back side was raised using a napping machine so that it had the same pile shape as the front side. At that time, the number of times the hair was raised was two. In the shirring machine, after shirring, the front and back sides are made of polyester, and after being passed twice in the forward and reverse directions at a temperature of 150℃ in a sosher machine, bra song is performed, followed by a temperature of 10℃.
After passing the hair through the hair twice in the forward and reverse directions at 0°C, only the front pile was brushed, and the ends of the front and back piles were finished by shirring.

It was cut to a length of 2 m in the warp direction and 1.4 m in the width direction, and sewn on all sides using bias cloth to produce a double-sided pile blanket weighing 1.8 kg/piece. (Hereafter, this will be referred to as A blanket) For comparison, non-shrinkable acrylic fiber (Exlan@) produced by a ring spinning machine and a double twister machine, 2 denier, bias cut 76
~102 mm, 2 denier acrylic fiber (exlan @) as a shrink fiber, and 500,000 denier tow were hot-stretched and cut, each of which was made into a sliver and mixed in a sliver shape at a ratio of GO: 40 to produce roving and then ring. A metric count of 1/3B'SN was produced using a spinning machine, and then double thread processing was performed using a double twister machine. At this time, the single yarn twist coefficient is K = 70, and the double yarn twist number is K = 80.

Using the 2/3G'SN□ metric count bulky twin yarn, knitting was carried out under the same conditions as in the above blanket production to give the same product weight, and after fabrication on one side, print dyeing was carried out.

Next, the front pile was passed through a brushing roller three times, and then the back surface was raised using a napping machine so that it had the same pile shape as the front surface.

The number of times the hair was raised at that time was 6 times.

Finishing was carried out under the same conditions as Blanket A using a poly shirring machine and a shearing machine to produce a double-sided 7 mile blanket, resulting in a product weighing 1.8 kg/sheet. (Hereinafter, this will be referred to as 8 blankets.) The products A and B blankets obtained above were compared in terms of (1) number of naps, @back pile shape, θ front and back pile shape, and (2) remaining loose hair. Comparative evaluation items @.

O9■ was evaluated by three expert judges. The results are shown in Table 2.

Despite the fact that the number of times the margin raising of the present invention quantity A blanket was less than 2 times per month compared to the conventional manufacturing method, both the back side pile shape and the front and back pile shape difference were good, and it was clearly superior to the 8 blanket.

Blanket A also showed good results with less loose hair generated by rubbing the pile in the same direction with constant pressure from the hand.

(Effects of the Invention) According to the present invention, it is possible to obtain a cut pile fabric with uniform pile shape on the front and back sides and good quality.

Claims (1)

[Claims] A cut pile fabric obtained from a double fabric in which two sets of base fabrics that are parallel to each other are connected, which consists of a core fiber that satisfies the following conditions as a connecting yarn and a binding yarn that wraps the core fiber. A pile fabric made using wrapping yarn. Core fiber: A substantially untwisted short fiber bundle, the number (n) of fibers constituting the core portion is 100 to 500. Binding yarn: A continuous filament yarn that accounts for 4 to 20% by weight of the wrapping yarn. Wrapping yarn: Wrapping coefficient (K) is 80 to 120, where K=T/√(N_m) T: Number of wrappings [T/m] N_m: Metric spinning count