KR790001155B1 - Method for finishing and preshrinking a fabric - Google Patents

Abstract

A highly shrinkable fabric was finished and preshunk using a four steps method. The fabric was dippcd into finishing soln. until water contents of the fabric became more than 50 wt.%. partially dried until 10-30wt.%, preshrunk by belt-support rolls and dried completely by a palmer feltbelt dryer.

Description

Fabric Processing and Preshrinkage Method

The accompanying drawings show, as one embodiment of the present invention, a combination of a highly shrinkable fabric processing device and a compression-preshrinkable device.

The present invention relates to a method of processing and preshrink high shrink fabrics.

In fabric manufacturing, highly shrinkable fabrics (which generally do not shrink until they are processed) do not sufficiently crystallize the processed starch when supplied directly from the processing process to the compression-pre-shrink process, resulting in shrinkage stability in harmony with the desired touch. Losing is already a known fact. Therefore, such fabrics have been widely used worldwide for drying between processing and compression-pre-shrink processes to ensure that the processed starch is crystallized. These fabrics are then rewet before entering the compression-preshrink process.

The present invention is of importance because the main problem in compressing and preshrunk the fabric is to allow the fabric to be adequately uniformly wet before it is sent to the compression preshrunk process. For fabrics, it is more difficult to start with a dry fabric and to get a uniform moisture penetration than to start with a wet fabric to control the moisture content. In addition, the use of padder allows more uniform penetration of moisture than the use of a spray box. With ordinary spray boxes, it is difficult to show that the fabric is properly and uniformly wetted under normal conditions. Therefore, the main object of the present invention is to improve to improve the adequacy and uniformity of the moisture penetration into the above high shrink fabric.

A second object of the present invention is to enhance efficiency by integrating processing and compression-pre-shrink processes.

A third object of the present invention is to prevent creep of compression-preshrunk fabrics.

A fourth object of the present invention is to improve the appearance of the fabric.

The fifth object of the present invention is to improve the fabric processing.

A sixth object of the present invention is to eliminate the drying and rewetting operation of the fabric between the processing process and the compression-pre-shrink process.

The seventh object of the present invention is to control the moisture content of the fabric before it is introduced into the compression-pre-shrink process.

The eighth object of the present invention is to combine a device capable of performing the above object with a device suitable for other intended other functions.

The present invention is briefly described as follows.

According to the present invention, instead of making the fabric wet in the dry state prior to introducing the fabric into the compression-pre-shrink process, it is only partially drying the wet fabric from the processing process. In essence, this method is achieved by entering the wet state from the wet state rather than from the dry state to the wet state, thereby achieving a more uniform penetration of the processing liquid. Other purposes also derive from this concept.

Referring to the present invention by the drawings as follows. As described in the drawing with an improved method for moisture control, a preferred method of practicing the present invention is to process the process solution 12 until the water content of the highly shrinkable fabric 10 is greater than 50% by weight in the feather 14. Dilution with a starch, lubricant, re-wetting agent and denaturant, and a series of heating cans to submerge the fabric so that the moisture content of the fabric is reduced to 10-30% by weight. 16) pass through and partially dry, then press-pre-shrink the fabric in a rubber-belt compression-preshrink device 18 and then pass the fabric to a Palmer felt-belt dryer. In step 20, the drying is performed sufficiently.

Combinations of devices included in the present invention are used to carry out the method described above. The fabric source may be a roll 22 or a box or other utensil. The supply of the fabric 10 through the feather 14 is regulated by padder rolls 36 and 38. The motor 24 is monitored by the tachometer 26 in a later known manner. The fabric is guided onto guiderolls 28, 30 and 32 to be immersed in the processing liquid 12 contained in the keg 34. The fabric is then squeezed between the feather rolls 36 and 38 so that the excess processing liquid is removed to make the dispersion of the processing liquid uniform in the fabric. When leaving the feather 14, the moisture content of the fabric 10 is 50% by weight or more.

Partial drying of the fabric 10 is by means of a heating can 16. The fabric is feathered by rolls (40), (42), (44), (46), (48) and cross over (50) and rolls (52), (54), (56). Is transferred to the heating can 16. Dance rolls 42 and 54 can be made heavy as needed. The moisture content is measured by the detector 58 to be maintained at 10-30% by weight.

In the compression preshrinkage device 18, the fabric 10 is compression preshrunk. After passing through the detector 58, the fabric is introduced into the clip expander 64 via the rolls 60 and 62 and expanded, and then rolls 66 and 68. Is introduced into the compression preshrinkage device 18. This compression preshrinkage device comprises a rotating heating drum 70, a pair of relatively small belt-support rolls 72, 74 and rolls 76 and a drum 70 below. It comprises a relatively thick rubber belt (78) passing in the order of the rolls (72), (74) and (76). The fabric enters a leading nip between the belt 78 and the drum 70 such that its surface portion contacted to the fabric by the action of the belt 78 is tensioned around the advance belt-support roller 72. Compression or preshrinkage is carried out in the longitudinal direction as it changes from the stretching condition under) to the tightness condition under compression around the drum (70). A nebulizer 79 is also provided.

The fabric 10 is passed from the compression-shrinkage device 18 and then passed through a Palmier dryer 20 with a belt belt 80 heated by the drum 82. The fabric is then passed through a PLATER 84, which continuously folds the fabric into a receiving cart 86 for delivery to subsequent transport or conversion processes. Palmer belt belt dryer 20 speed is controlled by motor 92 monitored by tachometer 94, the tachometer being synchronized with tachometer 26 in a manner known in the art. have.

Example 1

A series of tests performed on various high shrink fabrics in accordance with the present invention are reported in the following table.

Latent contraction (%)

Shape Weight (oz) Compression-Before Preshrink Compression-After Preshrink

Beveled Beveled Beveled Beveled

Nortena 11 1/2 10.8 2.3 0.4 ＊ 0.3

Suprema 13 1/2 9.7 2.4 3.3 ＊ 0.2

Chuviscar 11 1/4 9.5 2.7 3.2 ＊ 1.0

Rio Conchos 9 1/2 10.3 2.8 1.0 ＊ 0.2

Cosmos 13 1/2 8.5 3.0 3.0 0.8

Jaspe 10 9.0 3.3 2.1 1.2

* Table shows over-shrinkage.

These fabrics were contracted to overshrinkage, subshrinkage and 1% tolerance to observe the effect on fabric elongation.

All of the results in these tests were good and each of the fabrics was processed as follows.

The Greigeblue denim fabric from the loom was processed.

The fabric was passed through a feather to give processing compatible with the material in the compression-pre-shrinkage device to impart desirable hand and stretch resistance to the fabric after compression-shrinkage and wash-shrinkage resistance within the sanforize marking criteria.

The fabric was then passed over a steam heated can to partially remove the moisture to 10-30% by weight, and 17 steam heated cans were used as one unit. The speed was approximately 20 yards per minute. The vapor pressures of the cans were all about 15 psi.

Compression-pre-shrinkage was performed at a speed of approximately 20-30 yards per minute on a Morrison rubber-belt compression-preshrink.

The test strip after compression-pre-contraction is as follows.

Fabric elongation: after 4 hours and after 24 hours

0.1% (maximum) 0.4% (maximum)

0.0% (minimum) 0.1% (minimum)

0.0-0.1% (average) 0.2% (average)

Resistance to tensile compression-shrink tension when the fabric is folded flat (jerking effect on the fabric when the product is mechanically folded to a length of 1 yard).

Maximum elongation at tension: 0.1% when folded flat. Folding flat is to transport the product to the clothing manufacturer.

The processing liquid contains 75 gallons of water and the following components.

# 1 # 2 # 3

Polyvinyl Acetate 16.51bs 81bs 16.51bs

Starch 11.0〃 7〃 11.0〃

Oil 9.0〃 7〃 9.0〃

Softener 5.0〃 4〃 6.25〃

Rewetting agent 1.25〃 1〃 1.25〃

Note: The # 1 mixture is too hard, so # 2 has been suggested as suitable.

The # 2 mixture was shown to be too stretched during sewing.

The # 3 mixture was used to overcome elongation at sewing and to reduce stiffness.

The double weave from the loom was also treated.

The fabric was wetted in the laboratory by the method of wetting in the feather. In order to obtain a final finish that is compatible with the fabric in the compression-pre-shrinkage device to have the desired tactile feel and resistance to stretching of the fabric occurring after compression-pre-shrinkage and the control of washing shrinkage within the aforementioned standard values. Other processing agents can be added as soon as possible.

The fabric was wetted at a 10-30% weight ratio.

Compression-pre-shrink was performed at about 5 yards per minute in the form of laboratory moisture supply.

About 12 hours after the fabric was tested, there was no fabric extension from compression-pre-shrink.

Claims (1)

As described above in the text, the step of immersing the fabric in the processing liquid until the moisture content is 50% by weight or more, and partially drying the fabric until the moisture content is 10-30% by weight, and compressing the fabric by compression A method of processing and preshrinking a highly shrinkable fabric, characterized by comprising a step of preshrinking and completely drying the fabric.

Images