JPH0346577B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a method for producing a cut pile knitted fabric from a double knitted fabric knitted by a double lattice knitting machine or the like.

Conventional Technology and Problems to be Solved by the Invention Conventionally, cut pile knitted fabrics are produced by dividing a double knitted fabric knitted by a double lattice knitting machine or the like into two knitted fabrics using a knife cut from the center of the pile. It was obtained by dyeing and other necessary treatments.

However, this conventional method has the drawback that a large amount of dust is generated during knife cutting, causing a pollution problem and contaminating subsequent processing equipment.

The present invention provides a method for producing cut pile knitted fabrics that does not cause dust pollution or contamination problems for subsequent processing equipment during knife cutting. Furthermore, the present invention provides a method for producing cut pile knitted fabrics that dramatically improves production efficiency and is free from uneven dyeing and uneven cutting.

Means for Solving the Problems In other words, the method for manufacturing the cut pile knitted fabric of the present invention involves cutting the pile after the double knitted fabric undergoes each process of dyeing, washing, dehydration, and drying. .

In the present invention, knitting of double knitted fabric, dyeing treatment,
All known methods are used for the washing, dehydration, and drying steps, as well as the pile cutting step.

However, in the drying process,
Continuously holding one selvage of the upper knitted fabric of the double knitted fabric, and continuously holding the selvage of the lower knitted fabric on the opposite side to the one selvage of the upper knitted fabric. Expose. Further, in the drying treatment step, a high temperature treatment of 100° C. or higher is performed using hot air from both sides of the double knitted fabric.

EXAMPLE An example of the manufacturing method of the present invention is shown in FIGS. 1 and 2.

Double knitted fabric D made of acrylonitrile fiber knitted by a double ratchet knitting machine (not shown)
is led to a continuous spot dyeing device 10 for dip dyeing.
The dye liquid 11 is composed of a cationic dye, a relaxing dye, and a sizing agent, is uniformly reduced to 70 to 80% in a padder 12, and is sent to the next steamer 20. steamer 20
Inside, it is suspended at a fixed length from a hanging bar 22 connected to a conveyor chain 21.
It is steamed for 12-15 minutes in saturated steam at 100°C to fix the dye. In the case of this example, Palky is also expressed. Double knitted fabric D after the main process
are dyeing aids (slow dyeing agents) and sizing agents (mypresion inhibitors), oils used during textile manufacturing,
It is sent to a cleaning device 30 to remove other dirt and the like. An anionic surfactant is used as the cleaning liquid 31, and the temperature is 40 to 50°C. Next, the double knitted fabric D is subjected to a softening treatment and dehydration treatment device 40.
sent to. Urethane resin agent (hardening agent),
After immersing in the softening treatment liquid 41 using a high melting point wax agent and quaternary ammonium salt, the mangle 4
It is dehydrated in step 2 and introduced to a drying device 50. The drying device 50 uses a multistage pin tenter dryer 51, with a cloth speed of 10 to 20 m/min and a hot air temperature of 130°C.
This is done by blowing hot air at ~140℃ onto both the top and bottom of the double knitted fabric. Even if the hot air temperature is set to a relatively high temperature range and the hot air is blown from both the top and bottom of the double knitted fabric, the pile yarn will not be adversely affected by temperature, wind speed, etc.

As shown in FIG. 3, the pin tenter dryer 51 widens the double knitted fabric D and imparts directionality to both ears. That is, in FIG. 3, d1 is the upper knitted fabric, d2 is the lower knitted fabric, d3 is the pile yarn, d11 is one edge of the upper knitted fabric d1, and d22
is one ear part d11 of the upper knitted fabric d1 and the ear part of the lower knitted fabric d2 on the opposite side, 511 and 512 are the pins 51
Both ears d11 and d2 via 11 and 5121
Endless pin sheet that holds and extends 2.
513 is a brush roll.

As described above, the double knitted fabric D that has undergone the dyeing, steaming, washing, softening, dehydration, and drying processes is
As shown in the figure, it is sent to a knife cutting device 60 and divided by an endless knife 61 to obtain two cut pile knitted fabrics D1 and D2.

Effects of the Invention Therefore, in the present invention, dyeing, washing, dehydration, and drying treatment steps are performed before knife-cutting the double knitted fabric, and in particular, most of the fiber waste is removed during dyeing, and the fibers become soft and easy to cut. Therefore, there is no risk of dust pollution occurring during knife cutting, and there is no risk of dust contaminating drying processing equipment, etc. In addition, since the dyeing process has been applied in advance, it has the advantage of making it easier to cut and speed up the cutting process when cutting with a knife.Furthermore, the dyeing process and widening process described above improve the directionality of both selvedges of the double knitted fabric. Since it is attached, there is an advantage that there is no uneven incision when cutting with a knife.

Next, in the conventional method, the drying process is carried out after knife cutting, so hot air can only be blown on the back side of the cut pile fabric (if hot air is blown on the pile yarns on the front side, the pile yarns will be damaged).
However, in the present invention, since the double knitted fabric can be dried as it is, the pile yarns will not be damaged even if hot air is blown from both the front and back sides.
It is now possible to perform high-temperature processing from temperatures below 100°C to temperatures above 100°C, making it possible to significantly shorten drying time (by approximately 1/3) and dramatically improve production efficiency. In addition, in the conventional dyeing process, cut pile knitted fabrics were dyed, so the dye solution was not evenly applied to the tips of the cut pile yarns, resulting in uneven dyeing. Since the fabric is dyed as it is, the pile yarn is dyed evenly, eliminating uneven dyeing.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is an explanatory diagram showing the treatment steps of dyeing, steaming, washing, softening, dehydration, and drying of a double knitted fabric, and FIG. FIG. 3 is an explanatory diagram showing the knife cut, and FIG. 3 is an explanatory diagram showing the width of the double knitted fabric in cross section. D... Double knitted fabric, 10... Dyeing device, 20...
Steamer, 30...Washing device, 40
...Softening device and dehydration device, 50...Drying device,
60... Knife cutting device, d1... Upper knitted fabric, d
2... Lower knitted fabric, d11, d22... Ear part, D1,
D2...Cut pile knitted fabric.

Claims (1)

[Scope of Claims] 1. A method for producing a cut pile knitted fabric in which the pile is cut after a double knitted fabric is dyed, washed, dehydrated, and dried, and the pile is cut open in the drying process. , continuously holding one selvage of the upper knitted fabric of the double knitted fabric, and continuously holding the selvage of the lower knitted fabric on the opposite side to the one selvage of the upper knitted fabric. A method for manufacturing cut pile knitted fabric characterized by widening the fabric. 2. The method for producing a cut pile knitted fabric according to claim 1, wherein in the drying process, high temperature treatment using hot air is performed from both sides of the double knitted fabric.