Finishing process and device for improving washing size stability of high-elastic fabric

Abstract

The invention discloses a finishing process and device for improving the washing size stability of a high-elastic fabric, and the finishing process comprises the following steps: S1, carrying out high-temperature alkali decrement pretreatment on the high-elastic fabric to obtain a product A; s2, the product A is subjected to polyurethane coating finishing, a finished product is obtained, specifically, a1, the product A is subjected to water repellent treatment, and a product B is obtained; a2, calendaring the product B to obtain a product C; a3, the product C is coated with a polyurethane coating, the coating thickness ranges from 45 micrometers to 55 micrometers, and a product D is obtained; a4, the product D is dried, baked and cooled, and a finished product is obtained. The washing stability of the high-elastic fabric can be improved.

Description

Technical Field

[0001] The invention relates to a finishing process and a device for improving the washing dimensional stability of a high-elastic fabric, in particular to a finishing process and a device for improving the washing dimensional stability of a high-elastic fabric. Background Art

[0002] Washing dimensional change refers to the change in the length and width of textiles and clothing after washing, and this change is expressed as a percentage of the original size. This is an important quality indicator of textiles and clothing. Most textile and clothing standards use this item as an assessment indicator because the size of the washing dimensional change directly affects the trial and wearing effect of textile fabrics and clothing. Existing high-elastic fabrics are more easily deformed than traditional cotton fabrics because elastic fibers are added. If the washing method and temperature are not paid attention to, it may cause shrinkage and deformation, so it is necessary to improve the washing stability of high-elastic fabrics. Summary of the invention

[0003] The purpose of the present invention is to provide a finishing process and device for improving the washing dimensional stability of high-elastic fabrics. The finishing process and device can improve the washing stability of high-elastic fabrics.

[0004] A technical solution of the present invention: a finishing process for improving the dimensional stability of high-elastic fabric after washing, comprising the following steps:

[0005] S1. Perform high-temperature alkali reduction pretreatment on the high-elastic fabric to obtain product A;

[0006] S2. Perform polyurethane coating on product A to obtain a finished product.

[0007] In the aforementioned finishing process for improving the dimensional stability of high-elastic fabrics after washing, the specific steps of the S1 high-temperature alkali reduction pretreatment are: immersing the high-elastic fabric in a 30-40g / L sodium hydroxide solution, 2-3g / L of penetrant is added to the sodium hydroxide solution, and the temperature of the alkali reduction treatment solution is controlled to 90°C, the treatment time is 30min, the bath ratio of the high-elastic fabric to the alkali reduction treatment solution is 1:10, and the penetrant is JFC (fatty alcohol polyoxyethylene ether).

[0008] In the aforementioned finishing process for improving the dimensional stability of high-elastic fabric after washing, the specific steps of the polyurethane coating finishing are:

[0009] a1. Perform water-repellent treatment on product A to obtain product B;

[0010] a2. Calender product B to obtain product C;

[0011] a3. Coat product C with polyurethane coating with a coating thickness of 45-55 μm to obtain product D;

[0012] a4. Dry, bake and cool product D to obtain the finished product.

[0013] In the aforementioned finishing process for improving the dimensional stability of high-elastic fabrics after washing, the specific steps of the water-repellent treatment are: placing product A in a water-repellent finishing agent for immersion and rolling, and after the immersion and rolling, baking it at a pressure of 3.0-4.0MPa and a temperature of 150-160°C for 60s. The content of the water-repellent in the water-repellent finishing agent is 20-30g / L, and the water-repellent adopts a water-repellent model of DM-3668G.

[0014] In the aforementioned finishing process for improving the dimensional stability of high-elastic fabric after washing, the specific step of calendering is: rolling product B at a temperature of 110-130° C. and a pressure of 9-10 MPa.

[0015] In the aforementioned finishing process for improving the dimensional stability of high-elastic fabrics after washing, the polyurethane coating has a ratio of 95% polyurethane coating agent, 0.1% defoaming agent, 2-4% film-forming agent, 1-3% thickener and 1-2% cross-linking agent by mass.

[0016] A finishing process device for improving the dimensional stability of highly elastic fabrics after washing includes a coating mechanism for coating polyurethane coating on product C, a drying mechanism and a baking mechanism are arranged at the rear side of the coating mechanism, and is characterized in that: the coating mechanism includes a bracket, a cleaning box for cleaning product C is arranged in the bracket, a glue coating roller is arranged at the rear side of the cleaning box, and a scraper plate is arranged at the rear side of the glue coating roller.

[0017] In the aforementioned device for a finishing process for improving the dimensional stability of highly elastic fabrics after washing, the cleaning box comprises a box body, which is divided into a first processing chamber, a second processing chamber and an adsorption chamber from top to bottom by a horizontally arranged partition, a material guide port with an adjustable opening and arranged horizontally is provided on one side of the partition, a horizontally movable slider is provided in the material guide port, a folding baffle connected to the side wall of the box body is provided at one end of the slider, a cleaning brush is provided at the other end of the slider, guide rollers are provided on the upper and lower sides of the material guide port, a knocking mechanism for knocking product C is provided at the upper part of the first processing chamber and the second processing chamber, a dust suction pipe is provided at the lower part of the first processing chamber and the second processing chamber, the knocking mechanism comprises a sleeve vertically arranged on the box body, a moving block that can slide relative to the sleeve is provided in the sleeve, the moving block is connected to the bottom of the sleeve by a spring, a knocking block is provided at the lower part of the moving block, and a right-angle flow channel is provided in the moving block, and an inflation port is provided in the sleeve.

[0018] In the aforementioned finishing process device for improving the dimensional stability of high-elastic fabrics after washing, the right-angle flow channel includes a horizontal flow channel arranged at the lower end of the moving block and a vertical flow channel perpendicular to the horizontal flow channel, and the vertical flow channel is located on the upper side of the horizontal flow channel.

[0019] In the aforementioned device for a finishing process for improving the dimensional stability of highly elastic fabrics after washing, the upper and lower sides of the rear end of the adsorption chamber are provided with blow pipes inclined toward the front end, the upper and lower sides of the front end of the adsorption chamber are provided with exhaust pipes, and the side walls of the box body are provided with exhaust ports corresponding to the exhaust pipes.

[0020] Compared with the prior art, the present invention has the following advantages:

[0021] 1. The present invention performs high-temperature alkali reduction treatment on the high-elastic fabric, so that the surface of the high-elastic fabric is hydrolyzed, thereby improving the finishing effect of the polyurethane coating;

[0022] 2. The present invention cleans the fabric before coating by providing a cleaning box to prevent impurities from affecting the coating effect of the fabric, thereby improving the finishing effect of polyurethane on the fabric and improving the water washing stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the structure of the present invention;

[0024] Figure 2 It is a structural schematic diagram of the knocking mechanism of the present invention.

[0025] The marks in the accompanying drawings are: 2-bracket, 3-cleaning box, 4-glue coating roller, 5-scraper plate, 6-box body, 7-material guide port, 9-guide roller, 10-partition, 11-first processing chamber, 12-adsorption chamber, 13-second processing chamber, 14-slider, 15-folding baffle, 16-sleeve, 17-moving block, 18-knocking block, 19-right angle flow channel, 20-dust suction pipe, 21-inflating port, 22-horizontal flow channel, 23-vertical flow channel, 24-blowing pipe, 25-exhaust pipe, 26-exhaust port. DETAILED DESCRIPTION

[0026] The present invention is further described below in conjunction with the accompanying drawings and embodiments, but they are not intended to limit the present invention.

[0027] Embodiment. A finishing process for improving the dimensional stability of high-elastic fabric after washing, comprising the following steps:

[0028] S1. Perform high-temperature alkali reduction pretreatment on the high-elastic fabric to obtain product A;

[0029] S2. Perform polyurethane coating on product A to obtain a finished product.

[0030] The specific steps of the S1 high-temperature alkali weight reduction pretreatment are: immersing the high-elastic fabric in a 30-40g / L sodium hydroxide solution, adding 2-3g / L of penetrant to the sodium hydroxide solution, and controlling the temperature of the alkali weight reduction treatment solution to 90°C, the treatment time to 30min, the bath ratio of the high-elastic fabric to the alkali weight reduction treatment solution to 1:10, and the penetrant is JFC (fatty alcohol polyoxyethylene ether).

[0031] The specific steps of the polyurethane coating finishing are:

[0032] a1. Perform water-repellent treatment on product A to obtain product B;

[0033] a2. Calender product B to obtain product C;

[0034] a3. Coat product C with polyurethane coating with a coating thickness of 45-55 μm to obtain product D;

[0035] a4. Dry, bake and cool product D to obtain the finished product.

[0036] The specific steps of the water-repellent treatment are: placing product A in a water-repellent finishing agent for immersion and rolling, and after immersion and rolling, baking for 60 seconds at a temperature of 150-160°C under a pressure of 3.0-4.0MPa. The content of the water-repellent in the water-repellent finishing agent is 20-30g / L, and the water-repellent adopts a water-repellent model of DM-3668G.

[0037] The specific steps of calendering are: rolling product B at a temperature of 110-130° C. and a pressure of 9-10 MPa.

[0038] The polyurethane coating comprises, by mass, 95% of a polyurethane coating agent, 0.1% of a defoaming agent, 2-4% of a film-forming agent, 1-3% of a thickener and 1-2% of a crosslinking agent.

[0039] A device for a finishing process for improving the dimensional stability of highly elastic fabrics after washing, comprising a pre-treatment device, a cleaning device, a padding and moisture absorption finishing device and a foaming finishing device, comprising a coating mechanism for coating polyurethane coating on C products, a drying mechanism and a baking mechanism are arranged at the rear side of the coating mechanism, and the characteristic is that: the coating mechanism comprises a bracket 2, a cleaning box 3 for cleaning C products is arranged in the bracket 2, a glue coating roller 4 is arranged at the rear side of the cleaning box 3, and a scraper plate 5 is arranged at the rear side of the glue coating roller 4.

[0040] The cleaning box 3 comprises a box body 6, the box body 6 is divided into a first processing chamber 11, a second processing chamber 13 and an adsorption chamber 12 from top to bottom by a horizontally arranged partition 10, one side of the partition 10 is provided with a material guide port 7 with an adjustable opening and arranged horizontally, a slider 14 which can be moved horizontally is provided in the material guide port 7, a folding baffle 15 connected to the side wall of the box body 6 is provided at one end of the slider 14, a cleaning brush 22 is provided at the other end of the slider 14, guide rollers 9 are provided on the upper and lower sides of the material guide port 7, the first processing chamber A knocking mechanism for knocking product C is provided at the upper part of the first processing chamber 11 and the second processing chamber 13, a dust suction pipe 20 is provided at the lower part of the first processing chamber 11 and the second processing chamber 13, the knocking mechanism includes a sleeve 16 vertically arranged on the box body 6, a moving block 17 that can slide relative to the sleeve 16 is provided in the sleeve 16, the moving block 17 is connected to the bottom of the sleeve 16 through a spring, a knocking block 18 is provided at the lower part of the moving block 17, and a right-angle flow channel 19 is provided in the moving block 17, and an inflation port 21 is provided in the sleeve 16.

[0041] The right-angle flow channel 19 includes a horizontal flow channel 22 disposed at the lower end of the moving block 17 and a vertical flow channel 23 perpendicular to the horizontal flow channel 22 . The vertical flow channel 23 is located on the upper side of the horizontal flow channel 22 .

[0042] The adsorption chamber 12 has a blowing pipe 24 inclined toward the front end on both sides of the rear end, an exhaust pipe 25 on both sides of the front end, and an exhaust port 26 corresponding to the exhaust pipe 25 on the side wall of the box body 6.

[0043] The present application is aimed at improving high-elastic fabrics, especially the finishing process of polyester high-elastic fabrics. First, the high-elastic fabric is subjected to high-temperature alkali reduction treatment to hydrolyze the surface of the fabric, making the polyester limiting surface rough, reducing the inherent bending modulus of the fiber, and the high temperature exceeds the polyester crystallization temperature zone, resulting in an increase in polyester crystallinity, eliminating the internal stress of the fiber caused by knitting bending, and finishing with polyurethane elastic coating to improve the mechanical properties and oxidation stability of the high-elastic fabric, and also make the fabric have better oil resistance, solvent resistance, fire resistance and water resistance, and the increase in the thickness of the polyurethane coating will affect the improvement of wear resistance and strength, but will reduce moisture permeability. The thickness of the polyurethane coating used in this application is 45-55μm, which has good strength and good water resistance. Table 1 is a comparison of the water-washed dimensional stability finishing process of this application and the finishing process of this application that is not used.

[0044] Table 1 Comparison of the water-washed dimensional stability finishing process of this application and the finishing process not adopted in this application

[0045] Coating finishing Uncoated Finish Hydrostatic pressure resistance / KPa 1.4 3.1 Breaking strength / cn / dtex 65.6 40.5 <![CDATA[Air permeability / mL / m 2 ·s]]> 90.46 45.34 <![CDATA[Water vapor transmission rate / g / m 2 ·24h]]> >8500 <5000

[0046] In order to prevent external impurities from affecting the finishing effect during the finishing of the polyurethane coating, the present application sets a cleaning box 3 to clean the high-elastic fabric. When the fabric is in the first processing chamber 11, the inflation port 21 in the sleeve 16 will be inflated through an external inflation device. During inflation, the moving block 17 will move downward and stretch the spring, so that the knocking block 18 will produce a vibration impact on the fabric, and the impurities on the lower side of the fabric will fall off, and the impurities will be collected through the dust suction pipe 20. Due to the setting of the right-angle flow channel 19 in the moving block 17, when the horizontal flow channel 22 at the lower end of the moving block is exposed to the sleeve 16, the air pressure inside and outside the sleeve 16 is balanced, so that the moving block is reset under the action of the spring elastic force. When the air pressure in the sleeve 16 overcomes the spring elastic force again, the moving block moves downward again, thereby achieving periodic knocking and a good cleaning effect. The setting of the partition 10 and the slider 14 can reduce the mutual influence between the layers and prevent impurities from flying around. The side wall of the box body 6 is provided with a guide groove, and the side wall of the slider 14 is provided with a protrusion corresponding to the guide groove. In the second processing chamber 13, the other side of the fabric will be cleaned, and finally in the adsorption chamber 12, the final cleaning will be done. The wind is sent out by the blowing pipe 24 to blow and clean the surface of the fabric to remove impurities, and is collected through the exhaust pipe to form a complete flow channel with good cleaning effect.

Claims

1. A finishing process for improving the dimensional stability of high-elastic fabrics after washing, characterized in that: The following steps are involved: S1. Perform high-temperature alkali reduction pretreatment on the high-elastic fabric to obtain product A; S2. Perform polyurethane coating on product A to obtain a finished product.

2. A finishing process for improving the dimensional stability of high-elastic fabric after washing according to claim 1, characterized in that: The specific steps of the S1 high-temperature alkali weight reduction pretreatment are: immersing the high-elastic fabric in a 30-40g / L sodium hydroxide solution, to which 2-3g / L of penetrant is added, and the temperature of the alkali weight reduction treatment solution is controlled to be 90°C, the treatment time is 30min, and the bath ratio of the high-elastic fabric to the alkali weight reduction treatment solution is 1:

10.

3. The finishing process for improving the dimensional stability of high-elastic fabric after washing according to claim 1, characterized in that: The specific steps of the polyurethane coating finishing are: a1. Perform water-repellent treatment on product A to obtain product B; a2. Calender product B to obtain product C; a3. Coat product C with polyurethane coating with a coating thickness of 45-55 μm to obtain product D; a4. Dry, bake and cool product D to obtain the finished product.

4. A finishing process for improving the dimensional stability of high-elastic fabric after washing according to claim 3, characterized in that: The specific steps of the water repellent treatment are: placing product A in a water repellent finishing agent for immersion and padding, and after immersion and padding, baking it at a pressure of 3.0-4.0 MPa and a temperature of 150-160° C. for 60 seconds. The content of the water repellent in the water repellent finishing agent is 20-30 g / L.

5. The finishing process for improving the dimensional stability of high-elastic fabric after washing according to claim 3, characterized in that: The specific steps of calendering are: rolling product B at a temperature of 110-130° C. and a pressure of 9-10 MPa.

6. The finishing process for improving the dimensional stability of high-elastic fabric after washing according to claim 3, characterized in that: The polyurethane coating comprises, by mass, 95% of a polyurethane coating agent, 0.1% of a defoaming agent, 2-4% of a film-forming agent, 1-3% of a thickener and 1-2% of a crosslinking agent.

7. A finishing process device for improving the dimensional stability of high-elastic fabrics after washing according to claims 1-6, comprising a coating mechanism for coating polyurethane coating on product C, a drying mechanism and a baking mechanism being arranged at the rear side of the coating mechanism, characterized in that: The coating mechanism comprises a bracket (2), a cleaning box (3) for cleaning product C is arranged in the bracket (2), a glue coating roller (4) is arranged at the rear side of the cleaning box (3), and a scraper plate (5) is arranged at the rear side of the glue coating roller (4).

8. The device for improving the dimensional stability of high-elastic fabric after washing according to claim 7, characterized in that: The cleaning box (3) comprises a box body (6), wherein the box body (6) is divided into a first processing chamber (11), a second processing chamber (13) and an adsorption chamber (12) from top to bottom by a horizontally arranged partition (10), a material guide port (7) with an adjustable opening and arranged horizontally is provided on one side of the partition (10), a horizontally movable slider (14) is provided in the material guide port (7), a folding baffle (15) connected to the side wall of the box body (6) is provided at one end of the slider (14), a cleaning brush (22) is provided at the other end of the slider (14), guide rollers (9) are provided on the upper and lower sides of the material guide port (7), and the first processing chamber (11) is provided with a second processing chamber (13) and an adsorption chamber (12). A knocking mechanism for knocking the C product is provided at the upper part of the first processing chamber (11) and the second processing chamber (13); a dust suction pipe (20) is provided at the lower part of the first processing chamber (11) and the second processing chamber (13); the knocking mechanism comprises a sleeve (16) vertically arranged on the box body (6); a moving block (17) which can slide relative to the sleeve (16) is provided in the sleeve (16); the moving block (17) is connected to the bottom of the sleeve (16) through a spring; a knocking block (18) is provided at the lower part of the moving block (17); a right-angle flow channel (19) is provided in the moving block (17); and an air charging port (21) is provided in the sleeve (16).

9. The device for improving the dimensional stability of high-elastic fabric after washing according to claim 8, characterized in that: The right-angle flow channel (19) comprises a horizontal flow channel (22) arranged at the lower end of the moving block (17) and a vertical flow channel (23) perpendicular to the horizontal flow channel (22), wherein the vertical flow channel (23) is located on the upper side of the horizontal flow channel (22).

10. The device for improving the dimensional stability of high-elastic fabric after washing according to claim 8, characterized in that: The adsorption chamber (12) is provided with a blowing pipe (24) inclined toward the front end on the upper and lower sides of the rear end, an exhaust pipe (25) is provided on the upper and lower sides of the front end, and an exhaust port (26) corresponding to the exhaust pipe (25) is provided on the side wall of the box body (6).

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