Blended yarn and application thereof

Abstract

The invention discloses a blended yarn. The blended yarn at least contains water-soluble fibers and hollow fibers, the content of the water-soluble fibers is 10-30% by weight, the content of the hollow fibers is 60-80% by weight, and the hollow rate of the hollow fibers is 10-30%; the blended yarn is subjected to water-soluble treatment, and the hollow rate of the hollow fibers in the blended yarn is increased by 10%-20% compared with that before treatment. The fabric prepared from the blended yarn has the characteristics of light weight, heat preservation and good fluffiness, and can be widely applied to manufacturing of clothes, home textile products, indoor ornaments and the like.

Description

Technical Field

[0001] The invention belongs to the field of textiles and relates to a blended yarn and application thereof. Background Art

[0002] As people's living standards improve, they have higher expectations for fabrics and clothing, hoping to get lighter, warmer and softer fabrics.

[0003] To this end, people have made great efforts. For example, patent document CN106968035A discloses a weak-twist blended yarn and its production method. The yarn is obtained by first blending ultrafine staple fibers, water-soluble polyvinyl alcohol staple fibers, and other ordinary staple fibers, and then dissolving and removing the water-soluble polyvinyl alcohol fibers. Although this weak-twist blended yarn has a soft and fluffy effect, because it contains ultrafine staple fibers with a single filament fineness of 0.5 to 1.0 dtex, the water-soluble polyvinyl alcohol staple fibers in the blended yarn are dissolved, which reduces the fiber rigidity, overall support, and significantly reduces the fluffiness and thermal insulation properties. Summary of the Invention

[0004] The present invention aims to provide a blended yarn, wherein the fabric prepared from the blended yarn has excellent lightness, heat preservation and bulkiness.

[0005] The technical solutions of the present invention are as follows:

[0006] A blended yarn contains at least water-soluble fibers and hollow fibers, wherein the content of the water-soluble fibers is 10 to 30% by weight, the content of the hollow fibers is 60 to 80% by weight, and the hollow ratio of the hollow fibers is 10 to 30%. The blended yarn is treated with water solubility, and the hollow ratio of the hollow fibers is increased by 10 to 20% compared with that before the treatment.

[0007] The blended yarn of the present invention is treated with water solubility, and the water-soluble fibers are dissolved, and the hollow parts of the hollow fibers therein are restored, thereby increasing the hollow rate of the hollow fibers and improving the thermal insulation and lightness of the fabric. The fabric prepared therefrom has excellent lightness, thermal insulation and fluffiness, and can be widely used in making clothing, home textile products, interior decorations, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 This is a schematic cross-sectional view of the blended yarn of Example 1 before water-soluble treatment, wherein 1 is the hollow part of the hollow fiber, 2 is the non-hollow part of the hollow fiber, 3 is the water-soluble fiber, and 4 is the cotton fiber.

[0009] Figure 2 Schematic diagram of the cross section of the blended yarn after water-soluble treatment of Example 1, wherein 1 is the hollow part of the hollow fiber, 2 is the non-hollow part of the hollow fiber, and 4 is the cotton fiber. DETAILED DESCRIPTION

[0010] The blended yarn of the present invention contains at least water-soluble fibers and hollow fibers. Due to the characteristics of the hollow fibers, air is contained inside the fibers, which can isolate heat conduction. The fabric made from the hollow fibers has good thermal insulation and good bulk. Therefore, the blended yarn contains at least hollow fibers.

[0011] The blended yarn of the present invention comprises 10 to 30% by weight of water-soluble fiber. After water-soluble treatment, the hollow fibers in the blended yarn have a hollowness ratio that is 10 to 20% higher than before treatment. This is because during yarn processing and weaving, the hollow fibers may be partially deformed by external forces, resulting in a reduction in hollowness. In the present invention, the water-soluble fiber content is 10 to 30% by weight. After the water-soluble fiber dissolves, the interfiber spaces increase, providing sufficient space for the hollow fibers to recover. This high hollowness ratio allows fabrics made from the blended yarn to exhibit excellent thermal insulation, bulk, and lightweight properties. If the water-soluble fiber content is less than 10% by weight, the interfiber spaces are too small, insufficient space for the hollow fibers to recover, and poor thermal insulation, bulk, and lightweight properties result. If the water-soluble fiber content exceeds 30% by weight, the interfiber spaces are too large, resulting in an overly loose yarn structure and a sparse fabric with poor thermal insulation.

[0012] The water-soluble treatment conditions for the blended yarn of the present invention are not particularly limited. The temperature is 85-100°C for 20-30 minutes, and the treatment agent is water. After the water-soluble fibers are dissolved, the gaps between the fibers become larger, allowing the squeezed hollow parts to recover. The hollow ratio after recovery increases by 10%-20% compared to the hollow ratio before recovery. Fabrics made from this treatment significantly improve their lightweight, thermal insulation, and bulkiness.

[0013] In the present invention, the hollow fiber content and hollowness ratio are also very important for achieving good lightweight, thermal insulation, and fluffiness. Specifically, if the hollow fiber content is less than 60% by weight, the thermal insulation of the fabric is insufficient. If the hollow fiber content is greater than 80% by weight, the space for the hollow fibers to recover is too small, and the thermal insulation effect is still unsatisfactory. Therefore, the hollow fiber content is 60-80% by weight.

[0014] In the present invention, if the hollow ratio exceeds 30%, the outer wall of the hollow fiber is too thin and difficult to recover after being squeezed. If the hollow ratio is less than 10%, the hollow portion is too small, and even if it fully recovers, there is little room for improvement in thermal insulation and bulk. Therefore, the hollow ratio of the hollow fiber is 10-30%.

[0015] Preferably, in the present invention, the hollow fibers are polyester hollow fibers or polyamide hollow fibers. This is because polyester hollow fibers or polyamide hollow fibers have a lower density, higher breaking strength, and better wear resistance, and the fabrics made therefrom have a larger volume and better fluffiness.

[0016] Preferably, in the present invention, the blended yarn further contains cotton fiber in an amount of 5 to 20% by weight. If the amount is less than 5% by weight, the feel of the fabric may be affected. If the amount is greater than 20% by weight, the proportion of hollow fibers and water-soluble fibers in the blended yarn will be reduced, which may affect the fluffiness and thermal insulation properties of the fabric.

[0017] Preferably, in the present invention, the blended yarn further contains other fibers in an amount of 0-10% by weight. The other fibers are not particularly limited and are preferably regenerated fibers, such as viscose fibers. If the content of other fibers exceeds 10% by weight, the proportion of hollow fibers and water-soluble fibers in the blended yarn will be affected, and the thermal insulation properties of the fabric will tend to decrease.

[0018] The fabric made from the blended yarn of the present invention has the characteristics of light weight, heat preservation and good fluffiness, and can be widely used in the production of clothing, home textile products, interior decorations, etc.

[0019] The blended yarn of the present invention is not particularly limited in its manufacturing method. It can be obtained by the following method:

[0020] First, water-soluble fiber raw materials and hollow fiber raw materials are selected, mixed, combed, blended with combed cotton strips, roving, spun yarn, and then wound to form single yarn, thereby obtaining a blended yarn of the present invention.

[0021] The blended yarn obtained above is woven or knitted into grey fabric. Then the following processing steps are carried out: refining (95℃*20 minutes, scouring agent 2g / L) → pre-setting (170℃*2 minutes) → water-soluble processing (90℃*20 minutes) → dyeing (135℃*30 minutes) → finishing and setting (130℃*2 minutes) to obtain the finished fabric. Among them, the processing temperature of the water-soluble processing is 85-100℃, and the processing time is 20-30 minutes. When the water-soluble treatment is a single-bath process, the treating agent is water. When the water-soluble treatment and refining are processed in the same bath, a scouring agent can be added to the treating agent as long as the water-soluble fiber is completely dissolved.

[0022] The present invention will be further described below with reference to Examples and Comparative Examples.

[0023] The determination methods of the various parameters involved in the present invention are as follows:

[0024] (1) Hollowness

[0025] First, prepare a 10cm yarn to be tested and 5g of staple fibers. Note that the yarn and staple fibers should be different colors. For example, if the yarn is white, the staple fibers can be black. Also, prepare a copper plate with a 1mm aperture, a blade, and a backing plate. Place the yarn to be tested between the different-colored fibers, pass it through the small hole in the copper plate, and pull it taut to cut the section. Then, adjust the digital microscope to an appropriate magnification (e.g., 500x) for a clear view and take a photograph of the cross-section of the yarn before it dissolves.

[0026] Then, the cross-sectioned copper plate was placed in 90-degree hot water for 20 minutes to dissolve, and then the copper plate was placed in a 70-degree oven to dry for 5 minutes. The digital microscope was then adjusted to an appropriate magnification (such as 500 times) to take photos of the cross section after the yarn was dissolved.

[0027] Finally, print out the cross-sectional photos before and after dissolution and prepare for cutting. Select 10 points of the hollow fiber at corresponding positions on the photos before and after dissolution, and cut out the hollow part and non-hollow part of the hollow fiber respectively, weigh them separately, and calculate the results.

[0028] The weights of the hollow parts of the 10 points of the hollow fiber before dissolution are A1, A2, A3...A10, and the weights after dissolution are A1 ’ 、A2 ’ 、A3 ’ ...A10 ’ The weight of the non-hollow part of the hollow fiber at 10 points before dissolution is B1, B2, B3...B10, and the weight after dissolution is B1 ’ 、B2 ’ 、B3 ’ ...B10 ’ .

[0029] The total weight of the hollow part of the hollow fiber at 10 points before dissolution is A = A1 + A2 + A3 + ... A10, the total weight of the non-hollow part is B = B1 + B2 + B3 + ... B10, and the total weight of the hollow + non-hollow parts is A + B. The hollow rate before dissolution is calculated according to the following formula:

[0030] Hollowness (%) = [A / (A+B)]*100

[0031] The total weight of the hollow part of the hollow fiber at 10 points after dissolution is A ’ =A1 ’ +A2 ’ +A3 ’ +……A10 ’ , the total weight of the non-hollow part is B ’ =B1 ’ +B2 ’ +B3 ’ +…B10’ The total weight of the hollow + non-hollow parts is A1 ’ +B1 ’ , the hollow rate after dissolution is calculated according to the following formula:

[0032] Hollowness (%) = [A1 ’ / (A1 ’ +B1 ’ )]*100.

[0033] (2) Fiber content

[0034] Determined according to JIS L1030-2:2012 blending ratio standard.

[0035] (3) Thermal insulation value (KES constant temperature method)

[0036] The Kroger value of a fabric is obtained by measuring the power consumption required to maintain a constant temperature on a test board for a certain period of time. The larger the Kroger value, the better its thermal insulation. The specific steps are as follows:

[0037] ① Prepare three test samples of 20cm*20cm in size, and place them in an environment with a temperature of 20±2℃ and a humidity of 65±4%RH for more than 1 hour;

[0038] ② Turn on the KES F7 insulation equipment and preheat for 30 minutes, set the wind speed to 0.19m / s, and adjust the BT temperature to be 20℃ higher than the T ambient temperature;

[0039] ③ Take one of the humidity-conditioned test samples and place it on the hot plate. Record the BT value, T value, and W value on the device at this time.

[0040] ④Calculate by formula: Clo value = (BT-T)*A / (W*0.155),

[0041] in:

[0042] BT: The temperature of the hot plate when the test sample is placed.

[0043] T: ambient temperature,

[0044] W: Power consumption when the test sample is installed (W),

[0045] A: Area of ​​hot plate (0.01m 2 ).

[0046] ⑤ Obtain a total of 3 data using the same method and take the average value as the final result.

[0047] (4) Fluffiness

[0048] The bulkiness of the present invention is evaluated by the following bulkiness measurement, and the higher the value, the better the bulkiness.

[0049] ①First, measure the thickness a (mm) according to JIS L1096:2010 standard;

[0050] ②Then measure the weight b (g / m 2 );

[0051] ③Calculation: Bulkiness (cm 3 / g)=a / b*1000

[0052] (5) Lightness rate

[0053] The blended yarn to be tested is measured according to the method of "(2) Fiber Content" above to obtain the content of hollow fibers and record it as M1 weight %, and the content of water-soluble fibers and record it as M2 weight %. Then, the hollow ratio of the hollow fibers is obtained according to the measurement of "(1) Hollow Ratio" above and recorded as a%. Finally, the result is calculated according to the following formula:

[0054] Lightness rate (%) = (M1 weight %*a%+M2 weight %)*100.

[0055] Example 1

[0056] 80 weight percent of polyester hollow fibers (fineness 2.8 dtex, average length 38 mm, hollow fiber hollowness 25%), 10 weight percent of cotton (combed cotton, micronaire grade B) and 10 weight percent of water-soluble polyvinyl alcohol fibers (fineness 1.33 dtex, average length 38 mm) are selected as raw materials, and the following steps are carried out: mixing → carding → drawing → roving → spun yarn → winding to form a blended yarn. The spinning method is siro compact spinning, the twist coefficient of the spun yarn is set to 3.6, and the yarn count is set to 15S, thereby obtaining a blended yarn of the present invention.

[0057] The yarn prepared above was knitted on an 18-needle circular knitting machine to obtain a grey fabric with a jersey structure and a gram weight of 260 g / m 2 The horizontal density is 32 pieces / inch and the vertical density is 48 pieces / inch.

[0058] The above-mentioned grey fabric was subjected to scouring (95°C*20 minutes, scouring agent 2g / L) → pre-setting (170°C*2 minutes) → water-soluble processing (90°C*20 minutes) → dyeing (135°C*30 minutes) → setting (130°C*2 minutes) to produce a knitted fabric of the present invention. Specific parameters are shown in Table 1.

[0059] Example 2

[0060] The raw materials were changed to 80 wt % polyester hollow fibers and 20 wt % water-soluble polyvinyl alcohol fibers, and the rest were the same as in Example 1 to obtain the blended yarn and knitted fabric of the present invention. The specific parameters are shown in Table 1.

[0061] Example 3

[0062] The raw materials were changed to 60 wt % polyester hollow fiber, 30 wt % water-soluble polyvinyl alcohol fiber and 10 wt % cotton, and the rest were the same as in Example 1 to obtain the blended yarn and knitted fabric of the present invention. The specific parameters are shown in Table 1.

[0063] Example 4

[0064] The raw materials were changed to 60 wt% polyester hollow fiber, 20 wt% water-soluble polyvinyl alcohol fiber and 20 wt% cotton, and the rest were the same as in Example 1 to obtain the blended yarn and knitted fabric of the present invention. The specific parameters are shown in Table 1.

[0065] Example 5

[0066] The raw materials were changed to 70 wt % polyester hollow fiber, 20 wt % water-soluble polyvinyl alcohol fiber and 10 wt % cotton, and the rest were the same as in Example 1 to obtain the blended yarn and knitted fabric of the present invention. The specific parameters are shown in Table 1.

[0067] Example 6

[0068] The raw materials were changed to 80 wt% polyamide hollow fibers, 10 wt% water-soluble polyvinyl alcohol fibers and 10 wt% cotton, and the rest were the same as in Example 1 to obtain the blended yarn and knitted fabric of the present invention. The specific parameters are shown in Table 1.

[0069] Example 7

[0070] The raw materials were changed to 70 wt % polyester hollow fiber, 10 wt % water-soluble polyvinyl alcohol fiber, 10 wt % cotton and 10 wt % viscose, and the rest were the same as in Example 1 to obtain the blended yarn and knitted fabric of the present invention. The specific parameters are shown in Table 1.

[0071] Example 8

[0072] The raw materials were changed to 80 wt% polyester hollow fibers (the hollow ratio of the hollow fibers was 30%) and 20 wt% water-soluble polyvinyl alcohol fibers, and the rest were the same as in Example 1 to obtain the blended yarn and knitted fabric of the present invention. The specific parameters are shown in Table 1.

[0073] Example 9

[0074] The raw materials were changed to 80 wt% polyester hollow fibers (the hollow ratio of the hollow fibers was 30%) and 20 wt% water-soluble polyvinyl alcohol fibers, and the rest were the same as in Example 1 to obtain the blended yarn and knitted fabric of the present invention. The specific parameters are shown in Table 1.

[0075] Example 10

[0076] The raw materials were changed to 80 wt % polyester hollow fiber, 15 wt % water-soluble polyvinyl alcohol fiber and 5 wt % cotton, and the rest were the same as in Example 1 to obtain the blended yarn and knitted fabric of the present invention. The specific parameters are shown in Table 1.

[0077] Comparative Example 1

[0078] The raw materials were changed to 80 wt% polyester hollow fibers and 20 wt% cotton, and the rest were the same as in Example 1 to obtain a blended yarn and knitted fabric. The specific parameters are shown in Table 1.

[0079] Comparative Example 2

[0080] The raw materials were changed to 95% by weight of polyester hollow fibers and 5% by weight of water-soluble polyvinyl alcohol fibers, and the rest were the same as in Example 1 to obtain a blended yarn and knitted fabric. The specific parameters are shown in Table 1.

[0081] Comparative Example 3

[0082] The raw materials were changed to 80 wt% polyester hollow fibers (the hollow ratio of the hollow fibers was 5%), 10 wt% water-soluble polyvinyl alcohol fibers and 10 wt% cotton, and the rest were the same as in Example 1 to obtain a blended yarn and knitted fabric. The specific parameters are shown in Table 1.

[0083]

Claims

1. A blended yarn, characterized by: The blended yarn contains at least water-soluble fibers and hollow fibers, wherein the content of the water-soluble fibers is 10 to 30% by weight, the content of the hollow fibers is 60 to 80% by weight, and the hollow ratio of the hollow fibers is 10 to 30%; the blended yarn is treated with water solubility, and the hollow ratio of the hollow fibers is increased by 10% to 20% compared with that before treatment.

2. The blended yarn according to claim 1, characterized in that: The hollow fiber is a polyester hollow fiber or a polyamide hollow fiber.

3. The blended yarn according to claim 1 or 2, characterized in that: The blended yarn also contains cotton fiber, with a content of 5 to 20% by weight.

4. The blended yarn according to claim 3, characterized in that: The blended yarn further contains other fibers, with a content of 0 to 10 weight %.

5. Use of the blended yarn according to any one of claims 1 to 4 in fabrics.

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