A sandwich fabric and its three-proof finishing process

Abstract

The present invention discloses a sandwich fabric and a three-proof finishing process thereof, comprising a tubular structure (1) with a plurality of groups of weft-distributed connecting sections (5), the tubular structure (1) comprising a surface structure (2) formed by first warp yarns (3) interlaced along the weft direction, a horizontally distributed second warp yarn (4) arranged in the surface structure (2), a partition layer (6) formed by interlacing the first warp yarns (3) arranged between the second warp yarns (4), and a ratio of the number of the first warp yarns (3) to the second warp yarns (4) being 2:1. The present invention not only provides a sandwich fabric that is easy to prepare and has good thermal insulation performance, but also can improve its three-proof performance through a three-proof finishing process.

Description

Technical Field

[0001] The invention relates to a fabric and a finishing process thereof, in particular to a sandwich fabric and a three-proof finishing process thereof. Background Art

[0002] Nowadays, people have high requirements for the air permeability and thermal insulation performance of fabrics. Nowadays, fabrics begin to have good thermal insulation and air permeability by setting an air layer in the fabric. For example, the patent with application number 202220387203.0 discloses a cotton-like elastic air layer fabric, wherein the cotton-like surface layer is woven from cotton-like elastic yarn; the basic inner layer is arranged on the inner side of the elastic air layer, and the elastic air layer is arranged on the inner side of the cotton-like surface layer, and the surface of the cotton-like surface layer is also provided with a waterproof and breathable film; the elastic air layer is a spandex air layer, and the air layer fabric uses the design of the spandex air layer to give the fabric good air permeability and elasticity, and the design of the middle air layer can play a good warming effect. However, not only is its overall structure more complicated and difficult to prepare, but its three-proof performance is also poor. Summary of the invention

[0003] The purpose of the present invention is to provide a sandwich fabric and a three-proof finishing process thereof, which not only provides a sandwich fabric that is easy to prepare and has good thermal insulation performance, but also can improve its three-proof performance through the three-proof finishing process.

[0004] The technical solution of the present invention is a sandwich fabric, which is characterized by comprising a plurality of tubular structures with connecting sections distributed in the weft direction, wherein the tubular structure comprises a surface structure formed by first warp yarns interwoven along the weft direction, a second warp yarn distributed horizontally is arranged in the surface structure, a partition layer formed by interweaving the first warp yarns is arranged between the second warp yarns, and the ratio of the number of the first warp yarns to the second warp yarns is 2:1.

[0005] In the aforementioned sandwich fabric, the first warp yarn is 100D / 96F recycled polyester yarn.

[0006] In the aforementioned sandwich fabric, the second warp yarn is 300D / 288F torque-free polyester yarn.

[0007] The aforementioned three-proof finishing process of a sandwich fabric includes the following steps:

[0008] The first step is to remove oil from the sandwich fabric to obtain product A;

[0009] The second step is to dye product A to obtain product B;

[0010] The third step is to perform reduction washing on product B to obtain product C;

[0011] The fourth step is to perform three-proof finishing on product C to obtain the finished product.

[0012] In the aforementioned sandwich fabric and its three-proof finishing process, the first step of degreasing the sandwich fabric is to place the sandwich fabric in 40°C water for immersion and cleaning, and add a degreasing agent and a refining agent to the water at a ratio of 2g / l. The degreasing and dehydrated sandwich fabric will be baked in an oven at 80°C for 15 minutes to obtain product A.

[0013] In the aforementioned sandwich fabric and its three-proof finishing process, the specific method of dyeing product A in the second step is to adjust the pH value in the dyeing tank to 4-5, and add a leveling agent and a disperse dye at a ratio of 3g / l. After dyeing for 30 minutes, take it out and dehydrate it, pre-bake it at 105°C for 10 minutes, then bake it at 130°C for 40 minutes, and finally gradually reduce the temperature to 40°C to obtain product B.

[0014] In the aforementioned sandwich fabric and its three-proof finishing process, the specific method of the third step of reduction washing of product B is to add 2g / l of liquid alkali and 3g / l of insurance powder to product B at a water temperature of 70°C, dehydrate it and bake it at a temperature of 85°C for 15 minutes, and finally slowly reduce the temperature to 40°C to obtain product C.

[0015] In the aforementioned sandwich fabric and its three-proof finishing process, the specific steps of the fourth step of performing three-proof finishing on product C are to transport product C at a temperature of 180°C and a vehicle speed of 45m / min, treat product C with a softener during the transportation process, and perform two reduction washes and dehydration and drying again after treatment. The drying is carried out at a temperature of 100°C and a speed of 20m / min. After drying, it is shaped with a three-proof auxiliary agent, and after shaping, it is dried at a temperature of 150°C and a speed of 40m / min to obtain a finished product.

[0016] In the aforementioned sandwich fabric and its three-proof finishing process, the three-proof auxiliary agents in the shaping stage include: 2% softener silicone oil 418, 1.6% waterproof agent ECO PIUS and 1.2% three-proof synergist.

[0017] Compared with the prior art, the present invention has the following advantages:

[0018] 1. The present invention forms multiple groups of tubular tissues distributed in the weft direction by interweaving warp yarns and warp yarns. The second warp yarns in the tubular tissues will form an air layer in the tubular tissues, thus forming better thermal insulation and air permeability. Moreover, the formation of the air layer can be completed only by knitting equipment, and the preparation is relatively simple.

[0019] 2. The raw materials used for the sandwich fabric in the present invention are recycled polyester yarn and torque-free polyester yarn, which can reduce the production cost, and the torque-free polyester yarn can reduce the difficulty required for weaving and reduce the production difficulty;

[0020] 3. The three-proof finishing process of the present invention can combine dyeing with three-proof finishing, reduce the processing flow, and reduce the required degreasing treatment link. The degreasing treatment can prevent the oil pollution from affecting the combination of dye and sandwich fabric, and prevent the oil pollution from affecting the formation of the three-proof finishing layer on the sandwich fabric, so that the quality of the finished product is better;

[0021] 4. In the present invention, the sandwich fabric is subjected to three-proof finishing, so that the obtained finished product not only has good thermal insulation and breathability, but also has good three-proof performance, oil-proof, anti-fouling and waterproof performance. The initial three-proof score of the finished product can reach 95 points, and can still reach 90 points after 5 washings;

[0022] 5. In the process of the three-proof finishing of the sandwich fabric in the present invention, the dyed sandwich fabric is repeatedly subjected to reduction washing, thereby improving the color fastness of the fabric, so that the color fastness of the fabric can reach level 4. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the sandwich fabric of the present invention;

[0024] Figure 2 It is a knitting needle arrangement diagram of the sandwich fabric of the present invention.

[0025] The markings in the drawings are: 1- tubular structure, 2- surface structure, 3- first warp yarn, 4- second warp yarn, 5- connecting section, 6- barrier layer. 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 sandwich fabric, comprising: Figure 1-2 As shown, it includes a tubular tissue 1 composed of multiple groups of weft-distributed belt connecting sections 5, the tubular tissue 1 includes a surface tissue 2 formed by first warp yarns 3 interwoven along the weft direction, and horizontally distributed second warp yarns 4 are arranged in the surface tissue 2. A partition layer 6 formed by interweaving the first warp yarns 3 is arranged between the second warp yarns 4, and the ratio of the number of the first warp yarns 3 to the second warp yarns 4 is 2:1.

[0028] The first warp yarn 3 is 100D / 96F recycled polyester yarn.

[0029] The second warp yarn 4 is 300D / 288F torque-free polyester yarn.

[0030] The needle arrangement during the preparation of sandwich fabrics is as follows Figure 2 As shown, Figure 21-52 is a knitting arrangement of a tubular tissue, wherein 1-4 is a knitting needle arrangement of a connecting section 5 in the tubular tissue, the first warp yarn 3 will be interwoven to form the connecting section 5 and the surface tissue 2, and when knitting, the first warp yarn 3 will form a partition layer 6 under the action of the knitting needles, and the partition layer 6 will be covered with the second warp yarn 4, and the second warp yarn 4 will be covered in the surface tissue 2, which will cause the middle part of the tubular tissue to bulge and form an air layer, thereby having a good thermal insulation effect.

[0031] A three-proof finishing process for sandwich fabrics comprises the following steps:

[0032] The first step is to degrease the sandwich fabric by soaking and cleaning it in 40°C water, adding degreasing agent and refining agent in the water at a ratio of 2g / l. The degreased and dehydrated sandwich fabric is then dried in an oven at 80°C for 15 minutes to obtain product A.

[0033] The specific method of dyeing product A in the second step is to adjust the pH value in the dyeing tank to 4-5, and add a leveling agent and disperse dye at a ratio of 3g / l, take out and dehydrate after dyeing for 30 minutes, pre-bake at a temperature of 105°C for 10 minutes, then bake at a temperature of 130°C for 40 minutes, and finally gradually reduce the temperature to 40°C to obtain product B. The leveling agent used here can be a high-temperature leveling agent DS / 2115NE, and dyeing acid DA can be used to adjust the pH value of the dyeing tank. Disperse dyes can be selected according to the color required to be dyed, such as 200% yellow WGT, 200% scarlet WSRT, 200% blue WBT, 300% black PUD-SW and other colors of disperse dyes;

[0034] The specific method of the third step of reduction washing of product B is to add 2g / l of liquid alkali and 3g / l of hydrosulfite to product B at a water temperature of 70°C, dehydrate it and bake it at a temperature of 85°C for 15 minutes, and finally slowly reduce the temperature to 40°C to obtain product C;

[0035] The fourth step is to carry out three-proofing treatment on product C, which is as follows: transport product C at a temperature of 180°C and a vehicle speed of 45m / min, treat product C with a softener during the transport process, perform reduction washing and dehydration and drying twice after treatment, and dry product C at a temperature of 100°C and a speed of 20m / min. After drying, it is shaped with a three-proofing agent, which includes: 2% softener silicone oil 418, 1.6% waterproofing agent ECO PIUS and 1.2% three-proofing synergist. After shaping, it is dried at a temperature of 150°C and a speed of 40m / min to obtain a finished product.

Claims

1. A three-proof finishing process for sandwich fabrics, characterized in that: The sandwich fabric comprises a plurality of tubular structures (1) with connecting sections (5) distributed in the weft direction, the tubular structure (1) comprising a surface structure (2) formed by first warp yarns (3) interlaced in the weft direction, second warp yarns (4) distributed horizontally are arranged in the surface structure (2), and a partition layer (6) formed by interlacing the first warp yarns (3) is arranged between the second warp yarns (4), and the ratio of the number of the first warp yarns (3) to the second warp yarns (4) is 2:1; The three-proof finishing process includes the following steps: The first step is to remove oil from the sandwich fabric to obtain product A; The second step is to dye product A to obtain product B; The third step is to perform reduction washing on product B to obtain product C; The fourth step is to perform three-proof finishing on product C to obtain the finished product; The first step is to degrease the sandwich fabric by soaking and cleaning it in 40°C water, adding degreasing agent and refining agent in the water at a ratio of 2g / l. The degreased and dehydrated sandwich fabric is then dried in an oven at 80°C for 15 minutes to obtain product A. The specific method of dyeing product A in the second step is to adjust the pH value in the dyeing tank to 4-5, and add a leveling agent and disperse dye at a ratio of 3g / l, take out and dehydrate after dyeing for 30 minutes, pre-dry at a temperature of 105°C for 10 minutes, then bake at a temperature of 130°C for 40 minutes, and finally gradually reduce the temperature to 40°C to obtain product B; The specific method of the third step of reduction washing of product B is to add 2g / l of liquid alkali and 3g / l of hydrosulfite to product B at a water temperature of 70°C, dehydrate it and bake it at a temperature of 85°C for 15 minutes, and finally slowly reduce the temperature to 40°C to obtain product C; The fourth step is to carry out three-proof finishing on product C. The specific steps are as follows: transport product C at a temperature of 180°C and a vehicle speed of 45m / min, treat product C with a softener during the transport process, and perform two reduction washes and dehydration and drying again after treatment. The drying is carried out at a temperature of 100°C and a speed of 20m / min. After drying, it is shaped with a three-proof auxiliary agent, and after shaping, it is dried at a temperature of 150°C and a speed of 40m / min to obtain a finished product; the three-proof auxiliary agents in the shaping stage include: 2% softener silicone oil 418, 1.6% waterproofing agent ECO PIUS and 1.2% three-proof synergist.

2. The three-proof finishing process of sandwich fabric according to claim 1, characterized in that: The first warp yarn (3) is 100D / 96F recycled polyester yarn.

3. The three-proof finishing process of sandwich fabric according to claim 1 is characterized in that: The second warp yarn (4) is a 300D / 288F torque-free polyester yarn.

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