Shape memory fiber fabric and production method thereof

Abstract

The present invention relates to the technical field of fabric preparation, and in particular to a shape memory fiber fabric and a production method thereof. The production method comprises a shrinking process, a refining process, a predetermined process, a dyeing process, a reduction cleaning process and a setting process for the grey cloth in sequence, wherein the temperature in the shrinking process is first increased and then decreased to prevent excessive weft shrinkage at high temperature from causing marks.

Description

Technical Field

[0001] The invention relates to the technical field of fabric preparation, and in particular to a shape memory fiber fabric and a production method thereof. Background Art

[0002] Shape memory fiber is a special fiber whose final product has the function of remembering the original shape of the fiber. When the fiber is first formed, it can remember the initial shape given by the outside world. The fiber after shaping can be deformed arbitrarily and fix the deformation at a lower temperature or under the action of external force. When the deformed fiber is heated or washed with water or other external stimuli, the shape memory fiber returns to its original shape.

[0003] The Chinese invention patent with publication number CN101736487A discloses a PTT memory fabric production process, including batch warping, sizing, beaming, twisting, reeding, weaving, pre-dyeing and finishing, alkali reduction, dyeing, waterproofing and heat setting processes. The prepared PTT memory fabric has the property of being flat once stroked, and can achieve the effect of completely free of ironing. However, the preparation process is prone to appearance problems such as creases, vertical stripes, and color spots on the fabric. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a shape memory fiber fabric with less appearance defects and a production method thereof.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: a method for producing shape memory fiber fabrics, comprising a shrinking process, a refining process, a predetermined process, a dyeing process, a reduction cleaning process and a setting process for the grey cloth in sequence, wherein the temperature in the shrinking process is first increased and then decreased.

[0006] Another technical solution adopted by the present invention is: a shape memory fiber fabric is prepared by adopting the above-mentioned production method of the shape memory fiber fabric.

[0007] The beneficial effects of the present invention are as follows: the production method of the shape memory fiber fabric of the present invention sequentially performs a shrinking process, a refining process, a predetermined process, a dyeing process, a reduction cleaning process and a setting process on the grey cloth, and the temperature is first increased and then decreased during shrinking to prevent excessive weft shrinkage at high temperature from causing marks. DETAILED DESCRIPTION

[0008] In order to explain the technical content, achieved objectives and effects of the present invention in detail, the following is an explanation in conjunction with the implementation modes.

[0009] A method for producing shape memory fiber fabrics comprises a shrinking process, a refining process, a presetting process, a dyeing process, a reduction cleaning process and a setting process for a grey cloth in sequence, wherein the temperature in the shrinking process is first increased and then decreased.

[0010] From the above description, it can be seen that the beneficial effect of the present invention is that: due to the inconsistent shrinkage rate of the materials in the grey cloth, the shrinkage effect and flatness of the cloth surface at the same temperature are also inconsistent, and rapid high temperature easily causes large weft shrinkage and forms creases. The present invention first increases the temperature and then decreases it during refining to prevent excessive weft shrinkage at high temperature from causing creases.

[0011] Furthermore, the grey cloth includes T8 yarn and DTY yarn.

[0012] From the above description, we can know that T8 yarn has excellent elasticity and retraction, and the fiber has good shape memory function after being woven into fabric. The addition of DTY yarn can optimize the feel of the fabric.

[0013] Furthermore, the grey cloth is not pressed when placed before the shrinking process.

[0014] Furthermore, the diameter of the winding core tube used for the grey cloth package is larger than the width of the grey cloth.

[0015] From the above description, it can be seen that shape memory fiber will form a memory position when it is wound at a certain temperature point for a long time and with high tension. Even if it is subsequently treated with high temperature or high tension, it is difficult to restore to the original memory position, causing creases, indentations and other problems; the creases caused by the tension of the weaving package and the flatness of the package are difficult to improve and restore during dyeing and finishing. The present invention adopts a large-diameter winding core tube for winding, so that the package is flat, does not protrude, does not bulge, and does not need to be piled up, thereby avoiding creases and indentations.

[0016] Furthermore, the shrinking process adopts loose cloth handling, and the cloth edges are fully unfolded before feeding.

[0017] From the above description, it can be seen that the shrinking process adopts loose cloth handling, and the cloth edges are fully unfolded before feeding, which can avoid difficulties in the shrinking equipment passing through the machine, affecting the shrinkage and cloth surface effect.

[0018] Furthermore, the temperature of the reduction process is 50-95°C.

[0019] Furthermore, the reduction process is carried out in a reduction mill, which includes 7 water tanks arranged in sequence, and the temperatures of the 7 water tanks are 50°C, 85°C, 85°C, 95°C, 95°C, 70°C and 60°C in sequence.

[0020] Furthermore, the reduction process is carried out in a reduction mill, which includes 6 water tanks arranged in sequence, and the temperatures of the 7 water tanks are 50°C, 85°C, 95°C, 95°C, 70°C and 60°C in sequence.

[0021] Furthermore, the contraction process is carried out in a contraction machine, which includes 5 water tanks arranged in sequence, and the temperatures of the 7 water tanks are 50°C, 75°C, 85°C, 95°C, 95°C, 70°C and 60°C in sequence.

[0022] Furthermore, degreasing agents, soda ash, cylinder cleaning agents and anti-wrinkle agents are added in the refining process.

[0023] Furthermore, the dyeing time and dyeing temperature of all colors are consistent during dyeing.

[0024] From the above description, it can be seen that the dyeing time and dyeing temperature of all colors are consistent during dyeing, which ensures the consistency of shrinkage time of fabrics of different colors and improves the hemp-forming effect.

[0025] Furthermore, soda ash and hydrosulfite are added in the reduction cleaning process.

[0026] From the above description, it can be seen that adding soda ash during reduction cleaning can improve the feel of the fabric. Since T8 material is special, high-intensity reduction will affect the color, so the present invention chooses to use soda ash and hydrosulfite for mild reduction cleaning.

[0027] Furthermore, the temperature of the predetermined process is 150-170°C.

[0028] Furthermore, the temperature of the forming process is 130-140°C.

[0029] From the above description, it can be seen that the temperature of the predetermined process is relatively high to further shrink the cloth surface, thereby avoiding uneven dyeing of the cloth surface during dyeing.

[0030] Furthermore, the grammage during the predetermined process and the final process is the upper limit of the equipment used.

[0031] Furthermore, the air volume of the scheduled process and the completed process is 55~65%.

[0032] From the above description, we can know that if the air volume is too large during shaping, it is easy to cause bulging. The gram weight should be as close to the upper limit as possible. The thicker the fabric, the fluffier and elastic the fabric will be, and it will not easily become numb.

[0033] Another technical solution adopted by the present invention is: a shape memory fiber fabric is prepared by adopting the above-mentioned production method of the shape memory fiber fabric.

[0034] Embodiment 1 of the present invention is: a method for producing a shape memory fiber fabric, comprising the following steps: S1 shrinking process: the grey cloth includes 42.13wt% T8 FDY yarn and 57.87wt% polyester DTY yarn. The grey cloth is not piled up when placed. The diameter of the winding tube used for the grey cloth package is 2500mm, the width of the grey cloth is 2400mm, and the package is flat, without protruding heads or bulging. The shrinking process adopts loose cloth sorting and J-box cloth feeding for shrinking, and the cloth edges are fully unfolded before feeding; the shrinking process is carried out in a shrinking machine, which includes 7 water tanks arranged in sequence, and the temperatures of the 7 water tanks are 50℃, 85℃, 85℃, 95℃, 95℃, 70℃ and 60℃ respectively.

[0035] S2 refining process: carried out in an Ithaca overflow dyeing machine, the refining temperature is 120℃, the refining time is 20min, and the temperature is increased and decreased at a rate of 1℃ / min; 3.00g / L of degreasing agent MFB, 2.0g / L of soda ash, 0.5g / L of cleaning agent DER, 1.0g / L of anti-wrinkle agent DK JET are added, the bath ratio is 1:15, the nozzle is 90mm, the pump speed is 65%, and the circle time is 80~100s.

[0036] S3 scheduled process: carried out in Monforts hot air stentering machine, temperature 160℃, machine speed 20m / min, air volume 60%, specification 153mm×226g / m 2 .

[0037] S4 dyeing process: carried out in an Ithaca overflow dyeing machine, the dyeing temperature is 130°C, the dyeing time is 40 min, and the temperature is increased and decreased at a rate of 1°C / min; the materials added for dyeing are shown in Table 1.

[0038] Table 1

[0039] S5 reduction cleaning process: carried out in an Ithaca overflow dyeing machine at a temperature of 80°C for 20 minutes, adding 1g / L soda ash and 3g / L hydrosulfite.

[0040] S6 pickling process: carried out in an Ithaca overflow dyeing machine at a temperature of 60°C for 10 min, with the addition of 0.5 g / L glacial acetic acid.

[0041] S7 setting process: carried out in Monforts hot air stenter setting machine, temperature 135℃, machine speed 20m / min, air volume 60%, specification 149mm×237g / m 2 ; The specifications of the fabric after each process are shown in Table 2 (standard requirements: 142cm×245g / m 2 ).

[0042] S8 pre-shrinking process: It is carried out in a Monforts hot air stentering machine at a temperature of 130°C and a speed of 16m / min. After pre-shrinking, the shrinkage rate of the fabric after washing is reduced, the surface of the fabric is smooth, and the grammage is increased.

[0043] Table 2

[0044] The shape memory fiber fabric has a smooth surface, no obvious creases, and a few slight vertical stripes, but not too obvious; the overall weight is on the lower limit, especially for light colors, the weight can only be 227~228g / m 2 , after pre-shrinkage 233~235g / m 2 , barely enough to reach the lower limit; dark color is slightly better, the fixed weight is 231~235g / m 2 , after pre-shrinkage 236~240g / m 2 .

[0045] Embodiment 2 of the present invention is: The difference between the second embodiment and the first embodiment is that the temperature of the predetermined process is 150° C., the temperature of the final process is 130° C., and the air volume of the predetermined process and the final process is 55%.

[0046] Embodiment 3 of the present invention is: The only difference between the third embodiment and the first embodiment is that the temperature of the predetermined process is 170° C., the temperature of the final process is 140° C., and the air volume of the predetermined process and the final process is 65%.

[0047] The fourth embodiment of the present invention is a shape memory fiber fabric prepared by the production method of the first embodiment. The performance of the shape memory fiber fabric is tested, and the test results are shown in Table 3.

[0048] Table 3

[0049] In summary, the shape memory fiber fabric and the production method thereof provided by the present invention have the following advantages: 1. Use large diameter core tubes for winding and avoid creases and indentations by not stacking.

[0050] 2. During shrinking, the temperature rises first and then decreases, and the cloth is put into water at a lower temperature to prevent materials with different shrinkage rates in the grey cloth from shrinking too much in the weft direction at high temperature and causing creases.

[0051] 3. Use T8 yarn and DTY yarn to weave the grey cloth to obtain the grey cloth with good hand feel and good resilience.

[0052] 4. When shrinking, the edges of the fabric should be fully unfolded to avoid deformation and wrinkles.

[0053] 5. Add soda ash during reduction cleaning to improve the feel of the fabric.

[0054] 6. Use mild reduction cleaning to avoid color change of T8 material.

[0055] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent transformations made using the specification of the present invention, or directly or indirectly applied in related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A method for producing a shape memory fiber fabric, characterized in that: The method comprises a shrinking process, a refining process, a predetermined process, a dyeing process, a reduction cleaning process and a setting process, and the temperature in the shrinking process is first increased and then decreased.

2. The method for producing shape memory fiber fabric according to claim 1, characterized in that: The grey cloth comprises T8 yarn and DTY yarn.

3. The method for producing shape memory fiber fabric according to claim 1, characterized in that: The grey cloth is not pressed when placed before the shrinking process.

4. The method for producing shape memory fiber fabric according to claim 1, characterized in that: The shrinking process adopts loose cloth handling, and the cloth edges are fully unfolded before feeding.

5. The method for producing shape memory fiber fabric according to claim 1, characterized in that: The temperature of the refining process is 50-95°C.

6. The method for producing shape memory fiber fabric according to claim 1, characterized in that: The refining process adds degreasing agent, soda ash, cylinder cleaning agent and anti-wrinkle agent.

7. The method for producing shape memory fiber fabric according to claim 1, characterized in that: Soda ash and hydrosulfite are added in the reduction cleaning process.

8. The method for producing shape memory fiber fabric according to claim 1, characterized in that: The temperature of the predetermined process is 150-170°C.

9. The method for producing shape memory fiber fabric according to claim 1, characterized in that: The temperature of the setting process is 130~140℃.

10. A shape memory fiber fabric prepared by the method for producing a shape memory fiber fabric according to any one of claims 1 to 9.

Images