Production process of regenerative comb velveteen fabric

Abstract

The invention provides a production process of a regenerative comb velveteen fabric, which comprises the following process steps: blending, weaving, raising, dyeing and finishing, and is characterized in that 20-30% of regenerative raw material fiber and raw polyester are combined to produce the comb velveteen fabric, the comb velveteen fabric has moisture absorption, air permeability and environmental protection property, the fabric keeps soft and fine touch, resource waste and environmental pollution are reduced, and the production cost is reduced. Sustainable development is assisted; the invention provides the production process of the regenerated combed velveteen double-layer fabric, the double-process combination of surface layer siro spinning and inner layer rotor spinning is adopted, the warp knitting, raising, dyeing and finishing processes are improved, and the multiple advantages of super softness, high warmth retention, environmental protection and high cost performance of the fabric are realized.

Description

Technical Field

[0001] The invention relates to the technical field of automatic welding equipment, in particular to a production process of a regenerated combed cotton lint fabric. Background Art

[0002] With the increasing awareness of environmental protection and the increasing shortage of resources, recycled raw materials are increasingly used in the textile industry. However, how to effectively combine recycled raw materials with virgin fibers while maintaining the comfort and functionality of the fabric is a major challenge facing current textile technology.

[0003] The prior art discloses a production process for anti-downfalling soft cotton velvet fabric, which includes the following steps: weaving grey cloth with a weft knitting machine; steam spray dyeing; dehydration and drying; combing to form velvet; ironing treatment; polarizing treatment; heat setting. This process has advantages in velvet feel, glossiness and tightness, but it has shortcomings in comfort and softness, and the process steps are complicated and costly.

[0004] Therefore, it is necessary to develop a new production process to take into account the environmental protection, comfort and durability of combed cotton lint. Summary of the invention

[0005] The invention provides a production process of a regenerated combed cotton linter fabric to solve the above problems.

[0006] A technical solution adopted by the present invention is to provide a production process for a regenerated combed cotton lint fabric, comprising the following steps:

[0007] Step 1: blending the recycled raw material fiber and the virgin polyester by air-spinning or siro-spinning, wherein the weight percentage of the recycled raw material fiber is 20%-30% and the weight percentage of the virgin polyester is 70%-80%;

[0008] Step 2, using a circular knitting machine to weave the blended yarn into a grey cloth;

[0009] Step 3: Use a carbon brushing machine or a sanding machine to perform multiple napping treatments on the grey cloth to form short and dense nap;

[0010] Step 4: High temperature and high pressure dyeing is performed on the raised fabric to ensure the same color as the original fiber.

[0011] Step five, performing functional finishing on the dyed fabric, which functional finishing is one or more of softener treatment, antistatic treatment, and antibacterial treatment.

[0012] Furthermore, in step one, the virgin polyester uses polyester filaments with a fineness of less than 2D to improve the fluffiness and warmth retention, and the recycled raw material fiber uses recycled polyester fibers with a fineness of less than 1.2D, which are highly compatible with the virgin polyester and are easy to blend.

[0013] Furthermore, in the blending process, the yarn count is 32-40S and the twist is 400-800 twists / m, balancing the strength and softness of the fabric.

[0014] Furthermore, in step three, the grey cloth is subjected to 3-5 times of napping treatment. The first napping treatment is performed by coarse grinding of the grey cloth with carbon bristles at a speed of 1200rpm to remove surface nodules. After that, it is finely ground 2-4 times by a napping machine at a speed controlled at 800rpm.

[0015] Furthermore, in the functional finishing stage, the fabric is subjected to two padding processes, the first padding uses 5% silicone oil emulsion to improve surface smoothness, and the second padding uses 3% elastomer finishing agent to enhance fiber elasticity. The padding process here is a form of softener treatment.

[0016] Another technical solution adopted by the present invention is to provide a production process for a regenerated combed cotton lint double-layer fabric, comprising the following steps:

[0017] Step 1: using a siro spinning process to blend the recycled raw material fiber and the original polyester as the surface yarn, and using an air-spinning process to spin the original polyester as the inner yarn, wherein the surface yarn accounts for 40%-50% of the total weight of the fabric, and the recycled raw material fiber accounts for 20%-30% of the total weight of the surface yarn;

[0018] Step 2, feeding the surface yarn and the inner layer yarn into a double-sided jacquard circular knitting machine, knitting synchronously, and obtaining a grey cloth with a surface layer and an inner layer structure;

[0019] Step 3: Use a carbon brushing machine to perform a single light napping treatment on the surface of the grey fabric, and use a carbon brushing machine or a sanding machine to perform multiple napping treatments on the inner layer of the grey fabric to form short and dense nap;

[0020] Step 4: High temperature and high pressure dyeing is performed on the raised fabric to ensure the same color as the original fiber.

[0021] Step five, performing functional finishing on the dyed fabric, which functional finishing is one or more of softener treatment, antistatic treatment, and antibacterial treatment.

[0022] Furthermore, in step one, the virgin polyester uses ultra-fine polyester with a fineness of 0.8-1.0D to provide a more delicate and soft touch, and the recycled raw material fiber uses recycled polyester fiber with a fineness of less than 1.2D.

[0023] Furthermore, in step three, the single light napping treatment refers to lightly brushing the surface layer of the grey cloth at a rotation speed of 600 rpm, and the multi-pass napping treatment refers to fine grinding the inner layer of the grey cloth at least three times at a rotation speed of 800 rpm.

[0024] Furthermore, in step 4, high temperature and high pressure dyeing is carried out by staged temperature control. In the first stage, the temperature is raised to 125° C. and kept warm for 30 minutes. In the second stage, the temperature is raised to 130° C. and kept warm for 10 minutes.

[0025] Furthermore, in the functional finishing stage, the fabric is finished in steps. The first step is surface treatment, which ensures that the silicone oil is preferentially adsorbed on the surface by dipping silicone oil. The second step is inner layer treatment, which maintains the fluffy structure by foam finishing.

[0026] The beneficial effects of the production process of a regenerated combed cotton lint fabric of the present invention are:

[0027] 1. The comfortable cotton velvet produced by combining recycled raw material fibers with virgin polyester has good moisture absorption and breathability. The fabric still maintains a relatively soft and delicate touch. At the same time, it can help reduce resource waste and environmental pollution, effectively reduce carbon footprint, and promote sustainable development;

[0028] 2. Raising the pile first and then dyeing it makes the surface of the pile more open, which is conducive to the penetration of dyes and can effectively improve the uniformity of dyeing. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a schematic diagram of a production process of a regenerated combed cotton linter fabric in the first embodiment of the present invention;

[0030] Figure 2 It is a schematic diagram of a production process of a regenerated combed cotton lint double-layer fabric in the second embodiment of the present invention. DETAILED DESCRIPTION

[0031] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0032] In the description of the present invention, it should be understood that the terms "up", "down", "left", "right", "front", "back", "horizontal", "vertical", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention. They cannot indicate or imply that the components or elements referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention.

[0033] See also Figure 1 The first embodiment of the present invention produces a regenerated single-layer fabric of soft cotton velvet, the raw materials used are 30% by weight of regenerated polyester fiber and 70% by weight of ultra-fine denier polyester, and the process steps are as follows:

[0034] First, the recycled polyester fiber and ultra-fine polyester are blended using the Siro spinning process, and low twist spinning of 400-600 twists / m is used to improve the fluffiness and softness;

[0035] Second, use a high-needle circular knitting machine (34-36 needles / inch) to weave the blended yarn into grey fabric, controlling the weight at 180-220g / ㎡ to make the fabric fluffier and softer;

[0036] 3. Deeply raise the fabric:

[0037] 1. For the first raising, use a carbon brush to roughly grind the grey cloth at a speed of 1200rpm to remove the surface hardening;

[0038] 2. For the last two raisings, use a grinding machine equipped with a ceramic grinding roller to finely grind the grey cloth, with the speed controlled at 800 rpm to generate uniform short nap;

[0039] Fourth, high-migration disperse dyes are used for high-temperature and high-pressure dyeing, and fatty amine polyoxyethylene ether is added as a leveling agent. The dyeing temperature is controlled at 125°C, the time is 30 minutes, and the pH value is 4.5-5.0;

[0040] 5. Functional finishing of dyed fabrics:

[0041] 1. One-time padding: amino silicone oil and penetrant are used for one-time padding at a low temperature of 40°C. The dosage of amino silicone oil and penetrant is 5% and 0.2% of the weight of the fabric to improve the surface smoothness of the fabric;

[0042] 2. Secondary padding: PEA is used for secondary padding, wherein the amount of PEA is 3% of the weight of the fabric to enhance the elasticity of the fiber;

[0043] 3. Setting temperature: 150℃, time: 90s, to avoid ultra-fine fiber melting;

[0044] Specifically, during the raising process, the raising depth is controlled to be ≤1 mm to avoid fiber breakage.

[0045] Specifically, the dyeing process also includes a pre-treatment process and a post-cleaning process. The fabric is pre-treated with a non-ionic surfactant, with a bath ratio of 1:15, a temperature of 95°C, and 30 minutes to remove spinning oil and impurities and improve dyeing consistency. The fabric is post-treated with insurance powder and caustic soda, with a temperature of 80°C and 20 minutes to remove floating colors and improve color fastness.

[0046] See also Figure 2The second embodiment of the present invention produces a regenerated soft cotton double-layer fabric. The raw materials used for the surface yarn are 30% by weight of regenerated polyester fiber and 70% of ultra-fine denier polyester. The raw materials used for the inner yarn are 100% by weight of virgin polyester with a conventional fineness of 1.2D. The surface yarn accounts for 50% of the total weight of the fabric. The process steps are as follows:

[0047] First, the recycled polyester fiber and ultra-fine polyester are blended by siro spinning process as the surface yarn, and the virgin polyester is spun by air-spinning process as the inner yarn;

[0048] Second, a double-sided jacquard circular knitting machine (34 needles / inch) is used to synchronously weave the surface layer and the inner layer to form a grey fabric. The grey fabric has a surface layer with a single-sided plain needle structure and an inner layer with a terry structure. The surface layer and the inner layer are connected by a tuck structure to avoid delamination. The surface layer weight is controlled at 80-100g / m 2 The weight of the inner layer is controlled at 100-120g / m 2 , the total weight remains at 180-220g / m 2 ;

[0049] 3. Layer the fabrics:

[0050] 1. Raise the surface. Use carbon brush to lightly raise the surface. Control the speed to 600rpm and lightly brush.

[0051] 2. Raise the inner layer. Use a suede machine equipped with a ceramic suede roller to finely grind the inner layer three times. The speed is controlled at 800 rpm to generate uniform short lint.

[0052] Fourth, use staged temperature control for high temperature and high pressure dyeing:

[0053] 1. In the first stage, the temperature is raised to 125°C, kept warm for 30 minutes, and the surface is dyed;

[0054] 2. In the second stage, the temperature is raised to 130℃, kept warm for 10 minutes, the inner layer is deeply colored, and the pH value is controlled at 4.5-5 to avoid color difference;

[0055] 5. Functional finishing of dyed fabrics:

[0056] 1. Surface treatment: dip and roll silicone oil. Use amino silicone oil and penetrant for surface treatment. Dip and roll at a low temperature of 40°C. The dosage of amino silicone oil and penetrant is 5% and 0.2% of the fabric weight.

[0057] 2. Inner layer treatment: Foam finishing is performed on the inner layer of the fabric. The foam formula uses fatty acid ester softener and leavening agent, with the dosage being 8% and 3% of the fabric weight, respectively. The process is 160℃*2min pre-baking to finalize.

[0058] 3. Overall shaping, temperature 150℃, time 90s, control overfeed rate 8%-10% to relieve the shrinkage stress of the inner layer caused by the bulking agent;

[0059] Specifically, during the raising process, the raising depth is controlled to be ≤1 mm to avoid fiber breakage.

[0060] Specifically, the dyeing process also includes a pre-treatment process and a post-cleaning process. The fabric is pre-treated with a non-ionic surfactant, with a bath ratio of 1:15, a temperature of 95°C, and 30 minutes to remove spinning oil and impurities and improve dyeing consistency. The fabric is post-treated with insurance powder and caustic soda, with a temperature of 80°C and 20 minutes to remove floating colors and improve color fastness.

[0061] Specifically, fiber protectants such as polyethylene glycol may be added during dyeing to prevent the strength loss of the regenerated fibers.

[0062] Specifically, when performing functional finishing on the surface layer and the inner layer, the surface layer treatment and the inner layer treatment are performed by means of physical isolation so as to isolate the two additives and ensure the finishing effect.

[0063] The performance of the first embodiment, the second embodiment and the comparison group of the present invention are shown in the following table:

[0064]

[0065] The beneficial effects of the production process of a regenerated combed cotton lint fabric of the present invention are:

[0066] 1. The comfortable cotton velvet produced by combining recycled raw material fibers with virgin polyester has good moisture absorption and breathability. The fabric still maintains a relatively soft and delicate touch. At the same time, it can help reduce resource waste and environmental pollution, effectively reduce carbon footprint, and promote sustainable development;

[0067] 2. Raising the pile first and then dyeing makes the surface of the pile more open, which is conducive to the penetration of dyes and can effectively improve the uniformity of dyeing;

[0068] 3. Using ultra-fine polyester with a fineness of 0.8-1.0D as the original polyester makes the fabric more delicate and soft to the touch. The low-twist spinning and siro spinning processes make the yarn structure looser and less hairy. Combined with the improved raising, dyeing and padding processes, the softness of the fabric is significantly improved.

[0069] 4. The double process combination of surface siro spinning and inner air-spinning, combined with improved warp knitting, raising, dyeing and finishing processes, achieves the multiple advantages of ultra-soft fabric, high warmth retention, environmental protection and high cost performance.

[0070] 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 structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A production process for regenerated combed cotton linter fabric, characterized in that: The following steps are involved: Step 1: blending the recycled raw material fiber and the virgin polyester by air-spinning or siro-spinning, wherein the weight percentage of the recycled raw material fiber is 20%-30% and the weight percentage of the virgin polyester is 70%-80%; Step 2, using a circular knitting machine to weave the blended yarn into a grey cloth; Step 3: Use a carbon brushing machine or a sanding machine to perform multiple napping treatments on the grey cloth to form short and dense nap; Step 4: The raised fabric is dyed under high temperature and high pressure to ensure the same color as the original fiber. Step five, performing functional finishing on the dyed fabric, which functional finishing is one or more of softener treatment, antistatic treatment, and antibacterial treatment.

2. The production process of a regenerated combed cotton linter fabric according to claim 1, characterized in that: In step 1, the virgin polyester uses polyester filaments with a fineness of less than 2D, and the recycled raw material fiber uses recycled polyester fibers with a fineness of less than 1.2D.

3. The production process of a regenerated combed cotton linter fabric according to claim 2, characterized in that: In the blending process, the yarn count is 32-40S and the twist is 400-800 twists / m.

4. A production process for a regenerated combed cotton linter fabric according to any one of claims 1 to 3, characterized in that: In step three, the grey cloth is subjected to 3-5 times of napping treatment. The first napping treatment is performed by coarse grinding of the grey cloth with carbon bristles at a speed of 1200rpm, and then fine grinding is performed 2-4 times by a napping machine at a speed controlled at 800rpm.

5. The production process of a regenerated combed cotton linter fabric according to claim 4, characterized in that: In the functional finishing stage, the fabric is subjected to a double padding process, with a 5% silicone oil emulsion used in the first padding and a 3% elastomer finishing agent used in the second padding.

6. A production process for a regenerated combed cotton lint double-layer fabric, comprising the following steps: Step 1: using a siro spinning process to blend the recycled raw material fiber and the original polyester as the surface yarn, and using an air-spinning process to spin the original polyester as the inner yarn, wherein the surface yarn accounts for 40%-50% of the total weight of the fabric, and the recycled raw material fiber accounts for 20%-30% of the total weight of the surface yarn; Step 2, feeding the surface yarn and the inner layer yarn into a double-sided jacquard circular knitting machine, knitting synchronously, and obtaining a grey cloth with a surface layer and an inner layer structure; Step 3: Use a carbon brushing machine to perform a single light napping treatment on the surface of the grey fabric, and use a carbon brushing machine or a sanding machine to perform multiple napping treatments on the inner layer of the grey fabric to form short and dense nap; Step 4: The raised fabric is dyed under high temperature and high pressure to ensure the same color as the original fiber. Step five, performing functional finishing on the dyed fabric, which functional finishing is one or more of softener treatment, antistatic treatment, and antibacterial treatment.

7. The production process of a regenerated combed cotton lint double-layer fabric according to claim 6, characterized in that: In step one, the virgin polyester uses ultra-fine polyester with a fineness of 0.8-1.0D, and the recycled raw material fiber uses recycled polyester fiber with a fineness of less than 1.2D.

8. The production process of a regenerated combed cotton lint double-layer fabric according to claim 7, characterized in that: In step three, the single light napping treatment refers to lightly brushing the surface layer of the grey cloth at a speed of 600 rpm, and the multi-pass napping treatment refers to fine grinding the inner layer of the grey cloth at least three times at a speed of 800 rpm.

9. The production process of a regenerated combed cotton lint double-layer fabric according to any one of claim 8, characterized in that: In step 4, high temperature and high pressure dyeing is carried out by staged temperature control. In the first stage, the temperature is raised to 125°C and kept warm for 30 minutes. In the second stage, the temperature is raised to 130°C and kept warm for 10 minutes.

10. A production process for a regenerated combed cotton lint double-layer fabric according to any one of claims 6-9, characterized in that: In the functional finishing stage, the fabric is finished in steps. The first step is surface treatment, impregnation with silicone oil, and surface treatment with amino silicone oil and penetrant. The second step is inner layer treatment, foam finishing, and the formula uses fatty acid ester softeners and leavening agents.

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