Production method of moisture-absorbing and quick-drying hemp double-layer fabric

Abstract

The invention belongs to the technical field of hemp double-layer fabrics, and relates to a production method of a moisture-absorbing and quick-drying hemp double-layer fabric. After the hemp fibers are pretreated, the surface structure is improved, the hydrophilicity is enhanced, sweat and moisture discharged by a human body can be rapidly absorbed, and the skin is kept dry and comfortable; the hemp blended yarn is spun by introducing moisture-conducting and quick-drying fibers, so that moisture can be quickly conducted and evaporated in the fabric, the quick-drying speed of the fabric is increased, and the wet feeling and discomfort are reduced; the spun silk fibers are introduced, so that the comfort of the fabric is improved, and meanwhile, the fabric has good hand feeling and comfort and does not irritate the skin.

Description

Technical Field

[0001] The invention belongs to the technical field of hemp double-layer fabrics and relates to a production method of a moisture-absorbing and quick-drying hemp double-layer fabric. Background Art

[0002] As consumers' requirements for clothing fabric performance and environmental sustainability increase, natural plant fibers such as hemp fibers have received more and more attention due to their excellent moisture absorption, heat dissipation and eco-friendly properties. As a natural fiber, hemp fiber has excellent strength, breathability and antibacterial properties. Although hemp fiber has unique physical and chemical properties, such as good moisture absorption and breathability, antibacterial properties, etc., the original hemp fiber still has room for improvement in moisture absorption and quick-drying performance. In addition, fabrics prepared from pure hemp fibers have problems such as rough feel and poor flexibility, which limits its application in high-end clothing and functional fabrics. As people's requirements for clothing comfort continue to increase, the development of hemp fabrics with better moisture absorption and quick-drying properties has important market significance. Summary of the invention

[0003] Aiming at the problem that pure hemp fiber fabric has poor moisture absorption and quick-drying performance, the present invention provides a production method of moisture absorption and quick-drying hemp double-layer fabric.

[0004] The technical solution of the present invention is as follows:

[0005] A method for producing a moisture-absorbing and quick-drying hemp double-layer fabric, comprising the following steps:

[0006] Step 1: Hemp fiber pretreatment

[0007] 1.1 First, treat the hemp fiber with alkali to remove impurities, wax, pectin and other substances on its surface, improve the surface structure of the fiber, and increase the specific surface area and hydrophilicity of the fiber. Treatment method: First, wash and dry the hemp material, then put the dried hemp fiber into potassium hydroxide solution (concentration 0.5-2%), treat it at 60-80℃, and the treatment time is generally between 1-3 hours.

[0008] 1.2 In order to further improve the surface energy and hydrophilicity of hemp fiber and enhance the fiber's ability to absorb and transmit moisture, low-temperature plasma is used to treat hemp fiber. Treatment plan: The power of plasma treatment is 100-150W, the treatment time is 8-12 minutes, and the gas flow rate is 20-30L / min.

[0009] Step 2: Preparation of hemp moisture-absorbing and quick-drying yarn

[0010] The present invention uses hemp fiber, Coolmax fiber, cross-section polyester fiber and silk fiber as raw materials. The hemp fiber is obtained by pretreatment in step (1). Through experimental screening, it is determined that the blending ratio range of hemp fiber, Coolmax fiber, cross-section polyester fiber and silk fiber as raw materials is 40-60%: 25-35%: 15-25%: 10-15%. Within this ratio range, the unique performance of hemp fiber can cooperate with other fibers to improve the yarn's moisture absorption and quick-drying functionality and the comprehensive performance of wearing. The process flow of spinning hemp moisture absorption and quick-drying yarn is: cleaning - carding - drawing - coarse yarn - spun yarn - winding.

[0011] Step 3: Fabric structure design

[0012] The moisture-absorbing and quick-drying fabric structure of the present invention adopts a double-layer structure, wherein the inner layer is an open-hole structure and the outer layer is a twill structure. Through this double-layer structure, the fabric achieves a better balance in terms of moisture absorption and quick drying:

[0013] Inner layer perforated fabric: The surface layer adopts perforated fabric, which has strong surface moisture absorption performance, can quickly absorb sweat and diffuse it to the next layer. At the same time, it has good stability and uniformity, and is suitable for keeping dry on the side that contacts the skin.

[0014] Surface twill weave: The surface layer adopts twill weave structure, which has high air permeability and good drying performance. The twill weave has clear lines, which can accelerate the evaporation of water and air circulation, so that the fabric can dry quickly.

[0015] Configuration of warp and weft yarns: The inner layer warp and weft yarns are made of the hemp moisture-absorbing and quick-drying yarn prepared in step (2); the surface layer warp yarn is made of the hemp moisture-absorbing and quick-drying yarn prepared in step (2), and the weft yarn is made of pure cotton yarn with the same linear density. The purpose is to use the high moisture absorption rate of pure cotton yarn to quickly transfer the moisture inside to the outside, thereby improving the moisture absorption and quick-drying performance.

[0016] Furthermore, the moisture-absorbing quick-drying fabric structure of the present invention adopts a double-layer structure, wherein the inner layer is an open-hole structure and the outer layer is a 3 / 1 twill structure.

[0017] Configuration of warp and weft yarns: The inner layer warp and weft yarns are made of the linen moisture-absorbing and quick-drying yarn (18.2tex) prepared in step 2; the surface layer warp yarn is made of the linen moisture-absorbing and quick-drying yarn (18.2tex) prepared in step 2, and the weft yarn is made of pure cotton yarn (18.2tex) of the same linear density. The purpose is to use the high moisture absorption rate of pure cotton yarn to quickly transfer the moisture inside to the outside, thereby improving the moisture absorption and quick-drying performance.

[0018] Furthermore, the moisture-absorbing and quick-drying fabric structure of the present invention adopts a double-layer structure, wherein the inner layer is an openwork structure and the outer layer is a 3 / 1 twill structure.

[0019] Configuration of warp and weft yarns: The inner layer warp and weft yarns are made of the linen moisture-absorbing and quick-drying yarn (14.5tex) prepared in step 2; the surface layer warp yarn is made of the linen moisture-absorbing and quick-drying yarn (14.5tex) prepared in step 2, and the weft yarn is made of pure cotton yarn (14.5tex) of the same linear density. The purpose is to use the high moisture absorption rate of pure cotton yarn to quickly transfer the moisture inside to the outside, thereby improving the moisture absorption and quick-drying performance.

[0020] Step 4: Weaving process

[0021] The sizing process is mainly to improve the flexibility and wear resistance of the yarn. The sizing formula uses PVA1799, 26kg, starch 41kg, and polyacrylic acid 5kg. The process parameters are: vehicle speed 75m / min, pre-drying cylinder temperature 130℃, first squeezing roller pressure 7kN, second squeezing roller pressure 20kN, and sizing elongation controlled within 0.6%.

[0022] The weaving process uses a Picanol GTMax rapier loom with a speed of 360rpm. In order to increase the buckling wave of the surface warp yarn and improve the moisture absorption and quick-drying performance, the tension on the machine is appropriately reduced. For linen fabrics, delaying the opening time can reduce the friction of the reed on the warp yarn and reduce the breakage rate. The opening time is between 315° and 330°. The height of the back beam is +3 grids, and the front and back of the back beam are +5 grids.

[0023] Beneficial effects of the present invention:

[0024] After pretreatment, the surface structure of hemp fiber is improved and its hydrophilicity is enhanced, so it can quickly absorb sweat and moisture discharged from the human body and keep the skin dry; by introducing moisture-conducting and quick-drying fibers to spin hemp blended yarns, moisture can be quickly conducted and evaporated inside the fabric, which improves the quick-drying speed of the fabric and reduces the feeling of dampness and discomfort; the introduction of silk fiber improves the comfort of the fabric, while having a good feel and comfort, and will not irritate the skin. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] Example 1

[0027] Specifications of moisture-absorbing and quick-drying fabric: 220cm, hemp moisture-absorbing and quick-drying yarn (18.2tex) × hemp moisture-absorbing and quick-drying yarn (18.2tex) + pure cotton yarn (18.2tex) × 390 roots / 10cm × 310 roots / 10cm, double-layer structure, surface layer, 3 / 1 twill, inner layer openwork structure.

[0028] Step 1: Hemp fiber pretreatment

[0029] 1.1 Selected hemp fiber (fineness 1.5-2dtex, length 30-35mm), Coolmax fiber (1.2dtex×38mm, moisture absorption rate is generally 8%-12%), cross-section polyester fiber (1.2dtex×38mm), silk fiber (1.1dtex, length 16~40mm).

[0030] First, the hemp fiber is treated with alkali to remove impurities, wax, pectin and other substances on its surface, improve the surface structure of the fiber, and increase the specific surface area and hydrophilicity of the fiber. Treatment method: First, the hemp material is washed and dried, and then the dried hemp fiber is placed in a 0.5% potassium hydroxide solution at a treatment temperature of 60°C for 3 hours.

[0031] 1.2 In order to further improve the surface energy and hydrophilicity of hemp fiber and enhance the fiber's ability to absorb and transmit moisture, low-temperature plasma is used to treat hemp fiber. Treatment plan: The power of plasma treatment is 150W, the treatment time is 8 minutes, and the gas flow rate is 20L / min.

[0032] Step 2: Preparation of hemp moisture-absorbing and quick-drying yarn

[0033] The present invention selects hemp fiber, Coolmax fiber, cross-section polyester fiber and silk fiber as raw materials. The hemp fiber is obtained by pretreatment in step 1. The hemp fiber, Coolmax fiber, cross-section polyester fiber and silk fiber are used as raw materials in a blending ratio of 50%: 25%: 15%: 10%. The process flow of preparing hemp moisture-absorbing quick-drying yarn (18.2tex) is: cleaning-combing-drawing-roving-spinning-winding.

[0034] Step 3: Fabric structure design

[0035] The moisture-absorbing quick-drying fabric structure of the invention adopts a double-layer structure, wherein the inner layer is a perforated structure and the surface layer is a 3 / 1 twill structure.

[0036] Configuration of warp and weft yarns: The inner layer warp and weft yarns are made of the hemp moisture-absorbing and quick-drying yarn (18.2tex) prepared in step 2; the surface layer warp yarn is made of the hemp moisture-absorbing and quick-drying yarn (18.2tex) prepared in step 2, and the weft yarn is made of pure cotton yarn (18.2tex) of the same linear density. The purpose is to use the high moisture absorption rate of pure cotton yarn to quickly transfer the moisture inside to the outside, thereby improving the moisture absorption and quick-drying performance.

[0037] Step 4: Weaving process

[0038] The sizing process is mainly to improve the flexibility and wear resistance of the yarn. The sizing formula mainly includes PVA1799, 26kg, starch 41kg, and polyacrylic acid 5kg. The main process parameters are: speed 75m / min, pre-drying cylinder temperature 130℃, first squeezing roller pressure 7kN, second squeezing roller pressure 20kN, and sizing elongation controlled within 0.6%.

[0039] The weaving process uses a Picanol GTMax rapier loom with a speed of 360rpm. In order to increase the buckling wave of the surface warp yarn and improve the moisture absorption and quick-drying performance, the tension on the machine is appropriately reduced. For linen fabrics, delaying the opening time can reduce the friction of the reed on the warp yarn and reduce the breakage rate. The opening time is 315°. The height of the back beam is +3 grids, and the front and back of the back beam are +5 grids.

[0040] The fabric produced in the embodiment is tested for moisture absorption and quick drying, and the test is carried out according to the national standard GB / T21655.1-2008 "Evaluation of moisture absorption and quick drying of textiles Part 1: Single combination test method". It can be seen from the following table that the fabric produced by the present invention can effectively improve the moisture absorption and quick drying performance of the fabric.

[0041]

[0042] Example 2

[0043] Specifications of moisture-absorbing and quick-drying fabric: 210cm, hemp moisture-absorbing and quick-drying yarn (14.5tex) × hemp moisture-absorbing and quick-drying yarn (14.5tex) + pure cotton yarn (14.5tex) × 440 roots / 10cm × 370 roots / 10cm, double-layer structure, surface layer, 1 / 2 twill, inner layer openwork structure.

[0044] Step 1: Hemp fiber pretreatment

[0045] 1.1 Selected hemp fiber (fineness 1.5-2dtex, length 30-35mm), Coolmax fiber (1.2dtex×38mm, moisture absorption rate is generally 8%-12%), cross-section polyester fiber (1.2dtex×38mm), silk fiber (1.1dtex, length 16~40mm).

[0046] First, the hemp fiber is treated with alkali to remove impurities, wax, pectin and other substances on its surface, improve the surface structure of the fiber, and increase the specific surface area and hydrophilicity of the fiber. Treatment method: First, the hemp material is washed and dried, and then the dried hemp fiber is placed in a 2% potassium hydroxide solution at a temperature of 80°C for 1 hour.

[0047] 1.2 In order to further improve the surface energy and hydrophilicity of hemp fiber and enhance the fiber's ability to absorb and transmit moisture, low-temperature plasma is used to treat hemp fiber. Treatment plan: The power of plasma treatment is 100W, the treatment time is 12 minutes, and the gas flow rate is 30L / min.

[0048] Step 2: Preparation of hemp moisture-absorbing and quick-drying yarn

[0049] The present invention selects hemp fiber, Coolmax fiber, cross-section polyester fiber and silk fiber as raw materials. The hemp fiber is obtained by pretreatment in step 1. The hemp fiber, Coolmax fiber, cross-section polyester fiber and silk fiber are used as raw materials in a blending ratio of 40%: 25%: 20%: 15%. The process flow of preparing hemp moisture-absorbing quick-drying yarn (14.5x) is: cleaning-combing-drawing-roving-spinning-winding.

[0050] Step 3: Fabric structure design

[0051] The moisture-absorbing quick-drying fabric structure of the present invention adopts a double-layer structure, wherein the inner layer is an open-hole structure and the surface layer is a 3 / 1 twill structure.

[0052] Configuration of warp and weft yarns: The inner layer warp and weft yarns are made of the hemp moisture-absorbing and quick-drying yarn (14.5) prepared in step 2; the surface layer warp yarn is made of the hemp moisture-absorbing and quick-drying yarn (14.5) prepared in step 2, and the weft yarn is made of pure cotton yarn (14.5) of the same linear density. The purpose is to use the high moisture absorption rate of pure cotton yarn to quickly transfer the moisture inside to the outside, thereby improving the moisture absorption and quick-drying performance.

[0053] Step 4: Weaving process

[0054] The sizing process is mainly to improve the flexibility and wear resistance of the yarn. The sizing formula mainly includes PVA1799, 30, starch 40kg, and polyacrylic acid 5kg. The main process parameters are: speed 75m / min, pre-drying cylinder temperature 130℃, first squeezing roller pressure 8kN, second squeezing roller pressure 22kN, and sizing elongation controlled within 0.5%.

[0055] The weaving process uses a Picanol GTMax rapier loom with a speed of 360rpm. In order to increase the buckling wave of the surface warp yarn and improve the moisture absorption and quick-drying performance, the tension on the machine is appropriately reduced. For linen fabrics, delaying the opening time can reduce the friction of the reed on the warp yarn and reduce the breakage rate. The opening time is 330°. The height of the back beam is +2 grids, and the front and back of the back beam are +5 grids.

[0056] The fabric produced in the embodiment is tested for moisture absorption and quick drying, and the test is carried out according to the national standard GB / T21655.1-2008 "Evaluation of moisture absorption and quick drying of textiles Part 1: Single combination test method". It can be seen from the following table that the fabric produced by the present invention can effectively improve the moisture absorption and quick drying performance of the fabric.

[0057]

[0058] It will be appreciated by those skilled in the art that the features described in the various embodiments and / or claims of the present invention may be combined and / or combined in various ways, even if such combinations and / or combinations are not explicitly described in the present invention. In particular, the features described in the various embodiments and / or claims of the present invention may be combined and / or combined in various ways without departing from the spirit and teachings of the present invention. All of these combinations and / or combinations fall within the scope of the present invention.

Claims

1. A method for producing a moisture-absorbing and quick-drying hemp double-layer fabric, characterized in that the steps are as follows: Step 1: Hemp fiber pretreatment 1.1 Wash and dry the hemp material, then put the dried hemp fiber into potassium hydroxide solution at a temperature between 60-80℃ and a treatment time between 1-3 hours; 1.2 Use low-temperature plasma to treat hemp fiber; treatment plan: the power of plasma treatment is 100-150W, the treatment time is 8-12 minutes, and the gas flow rate is 20-30L / min; Step 2: Preparation of hemp moisture-absorbing and quick-drying yarn Hemp fiber, Coolmax fiber, cross-section polyester fiber and silk fiber are selected as raw materials; the hemp fiber is obtained by pretreatment in step 1; The blending ratio of hemp fiber, Coolmax fiber, cross-section polyester fiber and silk fiber as raw materials is 40-60%: 25-35%: 15-25%: 10-15%; The process flow of spinning hemp moisture absorption quick-drying yarn is: cleaning - carding - drawing - roving - spun yarn - winding; Step 3: Fabric structure design The moisture-absorbing and quick-drying fabric adopts a double-layer structure, with the inner layer being an openwork structure and the outer layer being a twill structure. Surface twill structure: The surface layer adopts twill structure. Configuration of warp and weft yarns: the inner layer warp and weft yarns are all made of the hemp moisture-absorbing quick-drying yarns prepared in step 2; The surface warp yarn is the hemp moisture-absorbing quick-drying yarn prepared in step 2, and the weft yarn is the pure cotton yarn with the same linear density; Step 4: Weaving process The sizing process uses PVA1799, starch and polyacrylic acid as the sizing material formula; the process parameters are: vehicle speed 75m / min, pre-drying cylinder temperature 130℃, first squeezing roller pressure 7kN, second squeezing roller pressure 20kN, and sizing elongation controlled within 0.6%; The weaving process adopts a loom weaving, the speed is 360rpm, the opening time is between 315° and 330°; the height of the rear beam is +3 grids, and the front and back of the rear beam are +5 grids.

2. The method for producing a moisture-absorbing and quick-drying hemp double-layer fabric as claimed in claim 1, characterized in that: In the step 1.1, the concentration of the potassium hydroxide solution is 0.5-2%.

3. The method for producing a moisture-absorbing and quick-drying hemp double-layer fabric as claimed in claim 1, characterized in that: In the third step, the inner layer is an openwork weave and the outer layer is a 3 / 1 twill weave; Configuration of warp and weft yarns: the inner layer warp and weft yarns are made of the hemp moisture-absorbing and quick-drying yarn (18.2tex) prepared in step 2; the surface layer warp yarn is made of the hemp moisture-absorbing and quick-drying yarn (18.2tex) prepared in step 2, and the weft yarn is made of pure cotton yarn (18.2tex) with the same linear density.

4. The method for producing a moisture-absorbing and quick-drying hemp double-layer fabric as claimed in claim 1, characterized in that: In the third step, the inner layer is an openwork weave and the outer layer is a 3 / 1 twill weave; Configuration of warp and weft yarns: the inner layer warp and weft yarns are made of the linen moisture-absorbing and quick-drying yarn (14.5tex) prepared in step 2; the surface layer warp yarn is made of the linen moisture-absorbing and quick-drying yarn (14.5tex) prepared in step 2, and the weft yarn is made of pure cotton yarn (14.5tex) with the same linear density.

5. The method for producing a moisture-absorbing and quick-drying hemp double-layer fabric as claimed in claim 1, characterized in that: In the fourth step, the slurry formula ratio is PVA1799: starch: polyacrylic acid = 26:41:5.

Images