Anti-ultraviolet blended fabric and weaving method thereof

Abstract

The invention relates to the technical field of textile fabrics, and discloses an anti-ultraviolet blended fabric and a weaving method thereof. The fabric is formed by blending 40-60% of anti-ultraviolet polyester fibers, 20-35% of cotton fibers and 15-30% of bamboo fibers, wherein the anti-ultraviolet polyester fibers are prepared by adding nano titanium dioxide and an ultraviolet light absorber into polyester chips and carrying out melt spinning. The UPF value of the fabric is not lower than 50, and combed cotton is adopted as cotton fibers. The weaving method comprises the steps of blending, spinning, plain weaving and after-finishing, the spinning count is 30-60, 2D resin is used for anti-wrinkle finishing, the heat setting temperature is 180-200 DEG C, reactive dye is adopted for dyeing, and the finished product has the properties of ultraviolet resistance, comfort and the like. The anti-ultraviolet fabric has the advantages that the problems that an existing anti-ultraviolet fabric is poor in durability, poor in comprehensive performance and the like are solved, and the anti-ultraviolet fabric is excellent in anti-ultraviolet performance, good in comprehensive performance and environmentally friendly.

Description

Technical Field

[0001] The present invention relates to the technical field of textile fabrics, and specifically refers to an anti-ultraviolet blended fabric and its weaving method. Background Art

[0002] With the improvement of people's living standards and the enhancement of health awareness, the demand for textile fabrics with special functions is increasing day by day. Ultraviolet radiation has potential hazards to human skin. Long-term exposure to ultraviolet rays may cause skin sunburn, aging, and even diseases such as skin cancer. Therefore, the research and development of anti-ultraviolet fabrics has become an important research direction in the textile field.

[0003] At present, the common anti-ultraviolet fabrics on the market mainly achieve anti-ultraviolet functions through the following several methods: One is in the fabric post-treatment process, using the padding method to attach ultraviolet absorbers or reflectors on the fabric surface. This method is relatively simple to operate, but there is a problem of poor durability. After multiple washes, the anti-ultraviolet agent is easy to fall off, resulting in a significant decline in the anti-ultraviolet performance of the fabric; the other is to add anti-ultraviolet additives to the fiber spinning solution to make anti-ultraviolet fibers and then carry out weaving. Although this method can improve the durability of anti-ultraviolet performance to a certain extent, most products are not optimized enough in terms of fiber blending ratio, weaving process, and post-treatment process, resulting in poor comprehensive performance of the fabric, such as rough hand feeling, poor air permeability, low color fastness, etc., and cannot meet the needs of consumers for high-quality anti-ultraviolet fabrics. At the same time, the raw material selection of existing anti-ultraviolet fabrics is relatively single, and it is difficult to balance multiple characteristics such as anti-ultraviolet performance, comfort, and environmental protection, which limits their application in more fields. Summary of the Invention

[0004] In order to solve the above various problems, the present invention proposes an anti-ultraviolet blended fabric and its weaving method that solve the problems of poor durability and poor comprehensive performance existing in existing anti-ultraviolet fabrics, and have excellent anti-ultraviolet performance, good comprehensive performance, and environmental protection.

[0005] To solve the above technical problems, the technical solution proposed by the present invention is: an anti-ultraviolet blended fabric is composed of the following raw materials blended in mass percentages: 40-60% of anti-ultraviolet polyester fiber, 20-35% of cotton fiber, and 15-30% of bamboo fiber; the anti-ultraviolet polyester fiber is obtained by adding 2-5% of nano-titanium dioxide and 0.5-1.5% of ultraviolet absorber by mass to polyester chips and then performing melt spinning, and the particle size of the nano-titanium dioxide is 20-50 nm.

[0006] Preferably, the mass percentage of the anti-ultraviolet polyester fiber is 45-55%, the mass percentage of the cotton fiber is 25-30%, and the mass percentage of the bamboo fiber is 20-25%.

[0007] Preferably, the ultraviolet absorber is a benzophenone ultraviolet absorber or a benzotriazole ultraviolet absorber.

[0008] Preferably, the ultraviolet protection factor UPF value of the anti-ultraviolet blended fabric is not less than 50.

[0009] Preferably, the cotton fiber is combed cotton fiber with a fiber length of 28-32 mm.

[0010] A method for weaving an anti-ultraviolet blended fabric comprises the following steps:

[0011] Blending: The anti-ultraviolet polyester fiber, cotton fiber and bamboo fiber are mixed evenly according to a certain proportion to obtain blended fiber;

[0012] Spinning: spinning the blended fibers to obtain blended yarn;

[0013] Weaving: weaving the blended yarn through a plain weaving process to obtain an anti-ultraviolet blended fabric grey cloth;

[0014] Post-finishing: the anti-ultraviolet blended fabric grey cloth is sequentially subjected to desizing, scouring, bleaching, dyeing, anti-wrinkle finishing and heat setting treatment to obtain the anti-ultraviolet blended fabric finished product.

[0015] Preferably, in the spinning step, the spinning count is 30-60.

[0016] Preferably, the anti-wrinkle finishing adopts a pad-bake-baking process, the finishing agent is 2D resin, the finishing agent concentration is 80-120g / L, the padding rate is 60-80%, the drying temperature is 80-100°C, the baking temperature is 150-170°C, and the baking time is 3-5min.

[0017] Preferably, the heat setting treatment temperature is 180-200° C. and the time is 1-3 min.

[0018] Preferably, the dyeing step adopts reactive dyes, the dyeing temperature is 60-80° C., the dyeing time is 40-60 min, and the bath ratio is 1:10-1:20.

[0019] Compared with the prior art, the present invention has the following advantages:

[0020] Excellent anti-ultraviolet performance: The present invention prepares anti-ultraviolet polyester fiber by adding nano titanium dioxide and ultraviolet absorber into polyester chips. Nano titanium dioxide has a small particle size and a large specific surface area, and can effectively scatter and reflect ultraviolet rays, while the ultraviolet absorber can absorb ultraviolet rays and convert them into harmless heat energy or other forms of energy for release, and the two act synergistically.

[0021] Good comprehensive performance: Anti-ultraviolet polyester fiber gives the fabric good strength and wear resistance; cotton fiber has good moisture absorption and comfort, which can enhance the soft touch of the fabric when it comes into contact with the skin; bamboo fiber has natural antibacterial and breathable properties, which keeps the fabric dry and reduces bacterial growth. The reasonable combination of the three makes the fabric have good mechanical properties, comfort properties and hygiene properties.

[0022] Good environmental protection: Bamboo fiber is a natural renewable fiber. It does not require a large amount of pesticides and fertilizers during its growth process and is environmentally friendly. At the same time, the post-finishing process and finishing agent used in the production process of the present invention minimize the pollution to the environment while meeting the performance requirements, which is in line with the development trend of green environmental protection.

[0023] Strong durability: Since the anti-UV function is imparted during the fiber preparation process, the anti-UV components are evenly distributed inside the fiber. Compared with the method of adding anti-UV agents during post-finishing, its anti-UV performance is more durable and can still maintain a high anti-UV performance after multiple washings. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a principle flow chart of the present invention. DETAILED DESCRIPTION

[0025] The present invention is further described in detail below with reference to the accompanying drawings.

[0026] Example 1

[0027] Raw material preparation: According to the mass percentage, prepare 50% of anti-ultraviolet polyester fiber, 25% of cotton fiber, and 25% of bamboo fiber. The preparation process of the anti-ultraviolet polyester fiber is as follows: add 3% of the mass of the polyester slices of nano titanium dioxide with a particle size of 30nm and 1% of benzophenone ultraviolet absorber, mix them well, and then melt-spin to obtain the anti-ultraviolet polyester fiber. The cotton fiber is combed cotton fiber with a fiber length of 28mm, and the bamboo fiber is of conventional quality.

[0028] Blending: Put the prepared UV-resistant polyester fiber, cotton fiber and bamboo fiber into the blending equipment, and mix the three fibers evenly through mechanical stirring and air flow mixing to obtain blended fiber. During the blending process, strictly control the speed and mixing time of the blending equipment to ensure that the fiber mixing uniformity reaches more than 98%, avoiding uneven fiber distribution and affecting the subsequent fabric performance.

[0029] Spinning: Carry out the spinning operation on the blended fibers. Adopt the ring spinning process to spin the blended fibers into 40 - count blended yarns. During the spinning process, adjust various parameters of the spinning machine, such as the draft multiple, twist, etc., so that the strength of the yarn reaches 3.5 cN / dtex, and the breaking elongation rate is controlled at about 18%, ensuring that the yarn has good mechanical properties and meets the weaving requirements. At the same time, conduct quality inspection on the yarns, and reject the unqualified yarns with problems such as excessive hairiness, broken ends, thick and thin places, etc.

[0030] Weaving: Weave the obtained blended yarns on a rapier loom through the plain weaving process to obtain the UV - resistant blended fabric greige. During the weaving process, control the weaving speed of the loom at 400 r / min, the warp tension at 150 N, and the weft tension at 120 N, ensuring that the density of the greige reaches 300 ends / 10 cm in the warp direction and 250 ends / 10 cm in the weft direction, making the greige have a tight structure and uniform texture.

[0031] Post - finishing:

[0032] Desizing: Put the greige into a solution containing 20 g / L of amylase desizing agent, and treat it at a temperature of 60 °C for 30 min to remove the sizing agent on the surface of the greige, improving the water absorbency and subsequent processing performance of the greige.

[0033] Scouring: Put the desized greige into a scouring liquor containing 15 g / L of sodium hydroxide and 5 g / L of scouring agent, and scour it at a temperature of 95 °C for 60 min to further remove impurities, waxes, etc. on the greige, improving the whiteness and water absorbency of the greige.

[0034] Bleaching: Adopt the hydrogen peroxide bleaching process. Put the scoured greige into a bleaching liquor containing 8 g / L of hydrogen peroxide and 2 g / L of stabilizer, and bleach it at a temperature of 80 °C for 40 min to make the greige reach a high whiteness, preparing for subsequent dyeing.

[0035] Dyeing: Adopt reactive dyes for dyeing. Put the bleached greige into a dyeing bath containing 3% reactive red dye, 20 g / L of sodium sulfate and 10 g / L of soda ash, and dye it at a temperature of 60 °C for 60 min, with a liquor ratio of 1:15. During the dyeing process, control the heating rate of the dyeing temperature at 1 °C / min to ensure uniform dyeing and improve the dyeing fastness. After dyeing, wash the greige thoroughly to remove the surface floating color.

[0036] Wrinkle - resistant finishing: Adopt the pad - dry - cure process. Immerse the dyed greige into a solution containing 100 g / L of 2D resin finishing agent, control the liquor pickup rate at 70%, then dry it at a temperature of 90 °C, and then cure it at a temperature of 160 °C for 4 min to make the greige obtain good wrinkle - resistant properties.

[0037] Heat setting treatment: The grey fabric after anti-wrinkle finishing is subjected to heat setting treatment at a temperature of 190 °C for 2 minutes to stabilize the size and structure of the fabric, and improve the flatness and gloss of the fabric. After the above process treatment, the finished anti-ultraviolet blended fabric is obtained. Performance testing of this finished product shows that its ultraviolet protection coefficient UPF value is 55, the warp breaking strength is 450 N, the weft breaking strength is 380 N, and after 50 washes, the UPF value still remains above 50, and all performance indicators meet the requirements of high-quality anti-ultraviolet fabrics.

[0038] Example 2

[0039] Raw material preparation: Prepare 45% anti-ultraviolet polyester fiber, 30% cotton fiber, and 25% bamboo fiber. The anti-ultraviolet polyester fiber is prepared by adding 4% by mass of nano-titanium dioxide with a particle size of 40 nm and 1.2% of benzotriazole ultraviolet absorber to polyester chips and then melt spinning. The cotton fiber is selected as combed cotton fiber with a fiber length of 30 mm, and the bamboo fiber is high-quality bamboo fiber.

[0040] Blending: The three fibers are mixed in a high-efficiency blending device. Through a specially designed stirring paddle and air flow circulation system, the fibers are mixed more evenly. During the blending process, the mixing state of the fibers is monitored in real time to ensure that the mixing uniformity reaches 99%.

[0041] Spinning: Using the compact spinning process, the blended fibers are spun into 50s blended yarn. Adjust the spinning parameters to make the strength of the yarn reach 3.8 cN / dtex, the breaking elongation rate is 16%, the yarn has few hairiness and a smooth surface. At the same time, the evenness of the yarn is detected to ensure that the CV value of the yarn evenness is within 12%.

[0042] Weaving: Plain weaving is carried out on an air-jet loom. The weaving speed is set at 500 r / min, the warp tension is 160 N, and the weft tension is 130 N. The warp density of the obtained grey fabric is 320 ends / 10 cm, and the weft density is 260 ends / 10 cm. During the weaving process, the quality of the grey fabric is regularly inspected, and the loom parameters are adjusted in a timely manner to avoid weaving defects.

[0043] Post-finishing:

[0044] Desizing: Using a solution containing 25 g / L of cellulase desizing agent, the grey fabric is desized at a temperature of 55 °C for 40 minutes to effectively remove the sizing agent with less damage to the fibers.

[0045] Scouring: The desized grey fabric is put into a scouring liquor containing 18 g / L of sodium hydroxide and 6 g / L of scouring agent, and scoured at a temperature of 98 °C for 50 minutes to fully remove impurities and improve the water absorbency and whiteness of the grey fabric.

[0046] Bleaching: The scoured grey fabric is bleached using the sodium hypochlorite bleaching process. It is placed in a bleaching solution containing 6 g / L of sodium hypochlorite and 3 g / L of activator, and bleached at 75°C for 35 minutes to achieve a whiteness of over 85 for the grey fabric.

[0047] Dyeing: Reactive blue dye is selected for dyeing. The dyeing bath contains 4% reactive blue dye, 25 g / L of sodium sulfate, and 12 g / L of soda ash. The bath ratio is 1:12, and dyeing is carried out at 70°C for 50 minutes. During the dyeing process, a segmented heating method is adopted to control the heating rate and ensure uniform dyeing. After dyeing, soaping and water washing are carried out to improve the dyeing fastness.

[0048] Wrinkle-resistant finishing: The concentration of the finishing agent is adjusted to 110 g / L, the padding rate is 75%, the drying temperature is 95°C, the curing temperature is 165°C, and the curing time is 3.5 minutes to endow the fabric with good wrinkle-resistant effects.

[0049] Heat setting treatment: Heat setting treatment is carried out at 185°C for 2.5 minutes to stabilize the fabric size, improve the fabric handfeel and glossiness. Performance testing is carried out on the finished product. Its ultraviolet protection factor UPF value is 58, the warp breaking strength is 480 N, and the weft breaking strength is 400 N. After 60 washes, the UPF value still remains at about 53, and both the anti-ultraviolet performance and mechanical properties of the fabric are excellent.

[0050] Example 3

[0051] Raw material preparation: 55% of anti-ultraviolet polyester fiber, 20% of cotton fiber, and 25% of bamboo fiber are selected. When preparing the anti-ultraviolet polyester fiber, 2.5% by mass of nano-titanium dioxide with a particle size of 25 nm and 0.8% of benzophenone ultraviolet absorber are added to the polyester chips, and then melt-spun. The cotton fiber is combed cotton fiber with a fiber length of 32 mm, and the bamboo fiber has been specially treated to improve its softness and glossiness.

[0052] Blending: Using an advanced automatic blending system, accurately control the input ratio and mixing time of the three fibers. Through multiple cycles of mixing, the fiber mixing uniformity reaches 99.5%.

[0053] Spinning: The rotor spinning process is adopted to spin the blended fibers into 35s blended yarn. Optimize the spinning process parameters to make the yarn strength reach 4.0 cN / dtex, and the breaking elongation rate is 17%. The yarn has good abrasion resistance and anti-pilling performance. Strict quality screening is carried out on the yarn to ensure the quality of the yarn put into weaving is qualified.

[0054] Weaving: Plain weaving is carried out on a water-jet loom. The weaving speed is 450 r / min, the warp tension is 140 N, and the weft tension is 110 N. The warp density of the grey cloth obtained is 280 threads / 10 cm, and the weft density is 240 threads / 10 cm. During the weaving process, strengthen the maintenance and monitoring of the equipment to ensure the stability of the weaving process and the quality of the grey cloth.

[0055] Post-treatment:

[0056] Desizing: Use a solution containing 18 g / L of desizing enzyme to desize the grey cloth at a temperature of 65 °C for 25 min, quickly and effectively removing the sizing agent.

[0057] Scouring: Put the desized grey cloth into a scouring solution containing 12 g / L of sodium hydroxide and 4 g / L of scouring agent, and scour it at a temperature of 92 °C for 70 min to fully remove impurities and wax, improving the permeability of the grey cloth.

[0058] Bleaching: Adopt a bleaching process combining oxygen bleaching and chlorine bleaching. First, put the grey cloth into an oxygen bleaching solution containing 7 g / L of hydrogen peroxide and 2.5 g / L of stabilizer, and carry out oxygen bleaching at a temperature of 85 °C for 30 min. Then, put it into a chlorine bleaching solution containing 5 g / L of sodium hypochlorite and 2 g / L of activator, and carry out chlorine bleaching at a temperature of 70 °C for 25 min to make the whiteness of the grey cloth reach over 90.

[0059] Dyeing: Use reactive yellow dye for dyeing. The dyeing bath contains 2.5% reactive yellow dye, 18 g / L of sodium sulfate, and 8 g / L of soda ash. The bath ratio is 1:18, and dyeing is carried out at a temperature of 80 °C for 40 min. After dyeing, carry out sufficient water washing and soaping to improve the dyeing brightness and color fastness.

[0060] Wrinkle-resistant finishing: The concentration of the finishing agent is 90 g / L, the padding rate is 65%, the drying temperature is 85 °C, the curing temperature is 155 °C, and the curing time is 4.5 min, making the fabric have good wrinkle-resistant performance.

[0061] Heat setting treatment: Carry out heat setting treatment at a temperature of 200 °C for 1.5 min to further improve the dimensional stability and appearance quality of the fabric. After testing, the UPF value of this finished product is 56, the warp breaking strength is 430 N, the weft breaking strength is 360 N. After 40 times of washing, the UPF value still remains above 52, and all performance indicators of the fabric meet the usage requirements, and it has good comfort and aesthetics.

[0062] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, making equivalent substitutions or changes, should be covered by the protection scope of the present invention.

Claims

1. An anti-ultraviolet blended fabric, characterized in that, Blended from the following raw materials by mass percentage: 40-60% of anti-ultraviolet polyester fiber, 20-35% of cotton fiber, and 15-30% of bamboo fiber; the anti-ultraviolet polyester fiber is obtained by adding 2-5% of nano-titanium dioxide and 0.5-1.5% of ultraviolet absorber by mass of the polyester chips, and then melt-spinning, and the particle size of the nano-titanium dioxide is 20-50nm.

2. The anti-ultraviolet blended fabric according to claim 1, wherein: The mass percentage of the anti-ultraviolet polyester fiber is 45-55%, the mass percentage of the cotton fiber is 25-30%, and the mass percentage of the bamboo fiber is 20-25%.

3. The anti-ultraviolet blended fabric according to claim 1, characterized in that: The ultraviolet absorber is one of benzophenone ultraviolet absorbers or benzotriazole ultraviolet absorbers.

4. The anti-ultraviolet blended fabric according to claim 1, wherein: The ultraviolet protection coefficient UPF value of the anti-ultraviolet blended fabric is not less than 50.

5. The anti-ultraviolet blended fabric according to claim 1, wherein: The cotton fiber is combed cotton fiber with a fiber length of 28-32mm.

6. A method for weaving an anti-ultraviolet blended fabric as described in any one of claims 1-5, characterized in that, Including the following steps: Blending: Mix the anti-ultraviolet polyester fiber, cotton fiber and bamboo fiber evenly in proportion to obtain blended fiber; Spinning: Spin the blended fiber to obtain blended yarn; Weaving: Weave the blended yarn by plain weaving process to obtain a grey fabric of anti-ultraviolet blended fabric; Post-finishing: The grey fabric of the anti-ultraviolet blended fabric is successively subjected to desizing, scouring, bleaching, dyeing, anti-wrinkle finishing and heat setting treatment to obtain a finished product of anti-ultraviolet blended fabric.

7. The weaving method of the anti-ultraviolet blended fabric according to claim 6, characterized in that: In the spinning step, the spinning count is 30-60s.

8. The weaving method of the anti-ultraviolet blended fabric according to claim 6, characterized in that: The anti-wrinkle finishing adopts a pad-dry-cure process, the finishing agent is 2D resin, the concentration of the finishing agent is 80-120g / L, the padding rate is 60-80%, the drying temperature is 80-100°C, the curing temperature is 150-170°C, and the curing time is 3-5min.

9. The weaving method of the anti-ultraviolet blended fabric according to claim 6, characterized in that: The temperature of the heat setting treatment is 180-200°C and the time is 1-3min.

10. The weaving method of the anti-ultraviolet blended fabric according to claim 6, characterized in that: The dyeing step adopts reactive dyeing, the dyeing temperature is 60-80°C, the dyeing time is 40-60min, and the bath ratio is 1:10-1:20.

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