JPS58197366A - Production of pile knitted 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] The present invention relates to a method for manufacturing pile knitted fabrics.

Conventionally, most attention has been focused on dyeing and finishing pile knitted fabrics so as not to disturb the surface pile surface of these gray fabrics. Therefore, in order to avoid compression of the pile, dyeing machines and dyeing methods are used, such as wince and jet dyeing machines, which dye the fabric while moving it without compressing and fixing it. When dyeing with such wince or liquid jet dyeing machines, creases such as folding wrinkles and rope wrinkles may occur on the fabric.
As a result, the direction of the pile changes, so before dyeing, dry heat setting under tension is generally performed to stabilize the fabric's form and prevent wrinkles. It is certainly effective in preventing the resulting disturbance in pile direction, but in the dyeing machine, the fabric moves while the temperature rises, causing the pile to collapse in areas called hits, resulting in the formation of skin areas. The product quality of pile knitted fabrics was significantly reduced. Since it is extremely difficult to correct this type of hit in the finishing process after dyeing, conventional methods have been used to dye pile knitted fabrics by tucking them into a bag shape with the pile side inside before dyeing.

However, even if pile knitted fabrics in which the pile yarns are thicker than the ground yarns constituting the ground structure are dyed using the tension dry heat setting and tacking process described above, disturbances in the directionality of individual piles occur throughout the fabric, causing folds and wrinkles. Even if the disturbance of the pile and the partial defects caused by this process can be eliminated, the surface appearance of the continuous pile becomes extremely uneven, making it extremely difficult to obtain a dyed product that maintains the beautiful appearance of the greige of knitted fabrics. Met. In particular, such disturbances in the entire pile occur frequently in knitted fabrics where the thickness of the pile yarn is thicker than the ground yarn.

Continuous dyeing methods, which are used in some areas such as carpet products, are a method for uniformizing the directionality of the entire pile of such pile knitted fabrics, but even when such methods are used, Perhaps because the strength of the base fabric, which corresponds to the primary base fabric of the carpet, is different, the directionality of the pile differs between the center part of the fabric r4 and the edge part l1f1.When observing the entire knitted fabric in the middle direction, the pile surface In reality, it is rare to be able to obtain products that are not uniform in appearance.

The inventors of the present invention have conducted intensive studies on methods for uniformly dyeing and finishing the pile direction of knitted fabrics, in which the pile yarns are thicker than the ground yarns constituting the ground structure, and have found that The present invention was achieved by discovering that by employing an extremely simple method of subjecting knitted fabrics to a relaxing heat treatment before dyeing, the directionality of the pile can be maintained uniformly. That is, the present invention resides in a method for producing a pile knitted fabric, which is characterized by subjecting the pile fabric to a relaxation heat treatment before dyeing it. It is conventional common sense to perform tension heat treatment to prevent wrinkles, but by using relaxation heat treatment, which is the complete opposite of the conventional concept, as in the present invention, it is possible to not only prevent wrinkles but also to eliminate so-called bumps without tacking. This prevents the occurrence of oxidation and provides a pile with uniform directionality.This action and effect on anti-acidity cannot be predicted based on conventional concepts, and its industrial value is extremely significant.

The pile knitted fabrics referred to in the present invention include sinker russo, French pile, needle pile, etc. produced by knitting machines, and pile-like products produced by looms, and include any of these. Further, a preferable knitted fabric from which the effects of the present invention can be expected to be more remarkable is one in which the pile yarn is at least twice as thick, preferably at least five times thicker than the ground yarn constituting the ground structure, and for example, a knitted fabric having one row of sword beds. A warp knitted fabric having a loop pile knitted by a knitting machine, in which the pile yarn has a thickness of at least twice, preferably at least 5 times, the thickness of the ground yarn constituting the ground structure, and the ground yarn has a part of the ground yarn. It is not knitted with knitting needles, thereby forming a thin section of the ground knitted fabric extending in the wale direction, while the pile yarn is formed into loop piles at intervals of one or more threads in the thin section of the ground knitted fabric. and the standing angle α of the loop pile.

In some cases, β is in the range of 60° to 120°, and the thickness of the loop pile from the ground knitted fabric is in the range of 1.54 to 5.5. The standing angle of the loop pile here refers to the angle between the perpendicular line drawn from the apex of the loop pile to the ground knitted fabric and the course direction of the ground knitted fabric, as shown in Figure 2, and the standing angle β is the angle between the perpendicular line and the ground knitted fabric. Refers to the angle with the wale direction of the knitted fabric.

Preferred pile fabrics include those in which polyester filament 7511 is used as the base yarn and No. 20 cotton twin yarn is used as the pile yarn, and these knitted fabrics can be used for rugs,
It is used for car seats, car mats, curtains, etc.

The pile yarn constituting the pile loop in the pile knitted fabric may be a natural fiber yarn, a recycled fiber yarn, a synthetic fiber yarn, or a mixture thereof. It may be a fiber yarn, a bulky IJII yarn, a spun textured yarn, or a tape yarn, without any restriction. There are no restrictions on the ground yarns constituting the ground weave, but long fiber yarns of synthetic fibers are preferred from the standpoint of tightening the loops of the ground knitted fabric in order to firmly anchor the pile yarns to the ground weave. In addition, if a yarn with high heat shrinkability is used for the base weave, the effects of the present invention will be more effective even in the case of a combination with a smaller thickness ratio.

Note that the present invention can also be applied to the case where pile knitted fabrics using yarn-dyed yarns are subjected to sewage treatment.

The relaxation heat treatment referred to in the present invention is achieved by uniformly arranging and contacting the individual facing piles in a manner that stabilizes the piles. As specific equipment, for example, a continuous steam device, a tenter using heated air, or a continuous relaxation device equipped with a hot water tank can be used, but all of these devices should be set to a low tension when processing the knitted fabric. is necessary. Adjustment of these tensions can be performed by adjusting the overfeed rate in equipment without a creampie mechanism, such as continuous steamer 1 continuous relaxation, and the overfeed rate is generally 0% or more, although it varies depending on the material and structure of the knitted fabric. ,
Preferably it is treated at 0-20. On the other hand, in the case of tenters, the width is also 0 inches or more, preferably #i5~1
Process while shrinking to a range of 5%. The treatment temperature varies depending on the yarns, texture, etc. that make up the knitted fabric, but it is 80 to 130'C for steam heat treatment and 150 to 200'C for dry heat treatment.
υ, hot water treatment can preferably be carried out at a temperature in the range of 80 to 95°C. The processing time and shrinkage rate of the own fabric are determined by the uniformity of the A-il.
Arrangement can be determined by observing each knitted fabric, but sufficient effects can generally be obtained in about 30 seconds to 6 minutes in both drying treatment and heat treatment.

The present invention will be explained below with reference to Examples, but is not limited thereto.

In addition, the directionality of the pile in the example was measured as shown in FIG. 4, and the uniformity was determined.

Figure M4 is an explanatory diagram for determining the directional t-measurement and uniformity of the pile, and Figure (A) is a cross-sectional view of the pile fabric.
(B) The figure is a plan view of the pile cloth. (Figure 9 is a plan view of the pile cloth, showing one row of piles with uniform directionality and one row of piles with non-uniform directionality. L is a cloth.

That is, in FIG. 4, the angle O between the length direction A of the cloth and the long diameter direction B of the pile 10 is taken as the pile angle, and the variation in the pile angle in one row of piles in the length direction of the cloth is expressed as a standard deviation.
Uniformity was determined.

Example 1 Used on a warp knitting machine having a two-row needle bed with a specification of 18 needles/inch, and using nylon 10011 as the ground yarn 11.12.
/2Of, pile yarn 13 is nylon bulky yarn 800
A pile warp knitted fabric was knitted with the knitting structure shown in Fig. 1 using eL150f. This knitted fabric fabric (width 215 cm) was
It was placed in a pin-type heat setter adjusted to an atmosphere of 60°C, and processed for 30 seconds to a width of 182 cm.
On the other hand, as a comparison, the pin width was expanded to obtain a width of 225 mm at the same temperature and treated for 60 seconds. In both cases, the overfeed in the warp direction was kept low, and the widths of both knitted fabrics were made equal and did not knit. At the same time, the fabric was set and put into a liquid jet dyeing machine, dyed dark blue by the following heating process, and the dehydrated layer was dried.

Measurement results of the pile angle of the obtained dyed fabric (pile 100
0 cloth speed 120 m/min Bath ratio 1:60 temperature increase Room temperature → 70'C!
2°/min 70°C → 95°C 1°/min 95°C As shown in the figure, nylon 100 denier/64 filament yarn is used for ground yarns 11 and 12 to be knitted by knitting needle a, and nylon 1600 denier/64 filament yarn is used for pile yarn 13 to be knitted by knitting needle a, as shown below. Koji pile length 4m fabric weight 6 organized with furi-structure
00. ! A pile warp knitted fabric was obtained which was light in weight (i'/m'') and had elegant characteristics.

Ground thread 11-10101 (11nx1out) Ground thread 12
”DO155 (11nx1out) Pile yarn 13=
22154/77/45 (11n x 1 out)
This silk fabric fabric (width 204 cm) was placed in a continuous steamer set at 105°C, and heated for 10 minutes without restricting the width.
Processed for minutes. The width was shrunk to 178 clnt.

On the other hand, the completely untreated greige fabric and the steam-treated knitted fabric were knotted with the same width, put into a Wince dyeing machine, dyed brown using the temperature raising treatment method described below, dehydrated and dried.〇 Bath ratio 1: 50 Temperature increase Room temperature →60℃ 1.5'/min 60'C→
95℃ 1°/min 95℃
(individual measurements) are shown in Shishi 2.

Table 2 Example 6 A pile fabric with a pile height of 4 cm and a pile weight of 3209/m'' was produced using a Wilton carpet loom (manufactured by Dowa Iron Works) under the following conditions.

Pile yarn light yarn: nylon bulky yarn 1050d/2p
ly ground thread Warp: Cotton thread 14: 1 hand 12 pieces / Stacked thread Warp thread: Jute thread 14 count 8 pieces /
Binding thread: jute thread, 14 threads, 2 knots, 16 pieces/
This greige fabric (width 200 cm) is placed in a 160℃ atmosphere v4! The paper was placed in a pin-type heat setter that had been installed in a vacuum cleaner, and was treated for 40 seconds to a width of 192 m. On the other hand, as a comparison, the pin width was increased to 2153 mm at the same temperature, and the treatment was performed for 40 seconds. In both cases, the overfeed in the longitudinal direction was set to 0IIb. The widths of both of these fabrics were made equal, the fabrics were knotted at the same time, and placed in a jet dyeing machine, where they were dyed, dehydrated, and dried under the same conditions as in Example 1. The pile angle measurement results (measured on 100 piles) of the nine dyed fabrics obtained are shown in Table 3.

Table 3

[Brief explanation of the drawing]

FIG. 1 is a diagram showing the knitting structure of the pile warp knitted fabric of Example 1,
Figure 2 (d) is a diagram showing the knitting of the pile warp knitted fabric of Example 2, Figure 183 is a model diagram showing the standing angle and height of the loop pile. Figure 4 is a diagram showing the directionality of the pile. , is an explanatory diagram for determining uniformity. a, b...Knitting needles (1) to (8)...Course display 1
0... Pile 11, 12... Ground thread 13... Pile thread 16... Ground knitted fabric B... Strict α, β...
・Standing angle γ...Loop pile height Fig. 1

Claims (1)

[Claims] 1. A method for producing a pile knitted fabric, characterized in that the pile knitted fabric is subjected to relaxation heat treatment in advance when dyeing the pile knitted fabric. 2. A pile in which the pile yarn is at least twice as thick as the ground yarn constituting the ground texture. A method for producing a pile knitted fabric according to claim 1, which is a knitted fabric.