Wool-like environment-friendly fabric and production method thereof

Abstract

The invention discloses a wool-like environment-friendly fabric and a production method thereof, the fabric is formed by jointly weaving filament composite yarns and long and short fiber composite yarns, the filament composite yarns account for 60-90% of the total weight of the fabric, the long and short fiber composite yarns account for 10-40% of the total weight of the fabric, and the content of regenerated fibers in the fabric is greater than 65%. The filament composite yarn is formed by compositing polyester elastic fibers and modified polyester fibers, and the long and short composite yarn is formed by compositing polyamide staple fibers and polyester elastic fibers. The fabric is knitted on a 32-needle double-face circular knitting machine, concave parts are formed through double-face needle selection, convex parts are formed through single-face needle selection, the concave-convex height difference is 2-3 mm, and the yarn type can be selected on the back face according to the hand feeling. The after-treatment comprises refining, dyeing, soaping, water washing, cloth expanding and shaping. The fabric provided by the invention has wool-like appearance hand feeling, excellent moisture absorption and quick drying performance and heat preservation function, good environmental protection property and high cost performance, and is suitable for garments such as fleeces, jackets, trouser materials and the like.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of textile fabrics, and particularly relates to an environmentally-friendly fabric with a wool-like effect and a production method thereof. BACKGROUND

[0002] Wool products have always been popular clothing fabrics in autumn and winter due to their excellent warmth retention and unique appearance and hand feeling. However, the dyeing process of wool is complex, the production cost is high, and the quick-drying performance of wool products is poor, which limits its application in the field of functional clothing. At the same time, with the increasing awareness of environmental protection, the market demand for environmentally-friendly fabrics containing recycled fibers is increasing.

[0003] In the prior art, there have been many attempts to imitate wool fabric. For example, patent CN103564895A discloses a green and environmentally-friendly coarse needle ultra-fine wool-like sweater fabric and a preparation method thereof, one side of which is a wool-like sweater and the other side contains a napped structure, which is made of biomass PDT ultra-fine denier fiber. Patent CN112663206A discloses a wool-like fabric using recycled raw materials and a production process thereof, which uses polyester recycled silk, cationic polyester recycled silk and high-shrinkage polyester virgin silk for mixed processing, and the recycled proportion reaches 85%. Patent CN111101257B discloses a warm fabric and a preparation method thereof, which interweaves wool-like PTT fibers with wool yarns and undergoes processes such as napping and rubbing. Patent CN101845697A discloses a preparation method of a new type of wool-like differential fiber, which composites PTT pre-oriented yarns with modified high-shrinkage polyester to achieve a wool-like effect. In addition, there are also attempts to imitate the structure of wool scales by composite fibers in foreign patent technologies.

[0004] However, the above-mentioned prior art still has the following shortcomings: (1) it is difficult to simultaneously achieve the fluffiness, softness and prickliness of wool by simply modifying the filament composite or fiber cross-section; (2) although some technologies use recycled raw materials, the moisture absorption, quick-drying and warmth retention functions of the fabric are not considered; (3) the structure is single, mostly uniform, lacks three-dimensional concave-convex feeling, and the wool-like effect is not realistic enough; (4) some technologies require special equipment or complex processes, and the production cost is high.

[0005] Therefore, it is a technical problem to be solved in the field to develop a high-performance wool-like fabric with wool-like appearance and hand feeling, excellent moisture absorption and quick-drying performance, good warmth retention function and good environmental protection. SUMMARY

[0006] The purpose of the present application is to overcome the shortcomings of the prior art, provide an environmentally-friendly wool-like fabric and a production method thereof, and realize the wool-like appearance and hand feeling by reasonably matching the composite yarns, designing the knitting structure and using the finishing process, while endowing the fabric with excellent moisture absorption and quick-drying performance and warmth retention function, and ensuring environmental protection.

[0007] Technical solution: To achieve the above objectives, the present invention adopts the following technical solution: In a first aspect, the present invention provides a wool-like environmentally friendly fabric, wherein the fabric is woven from filament composite yarn and long-short fiber composite yarn, wherein the filament composite yarn accounts for 60-90% of the total weight of the fabric, the long-short fiber composite yarn accounts for 10-40% of the total weight of the fabric, and the content of recycled fiber contained in the fabric is greater than 65%.

[0008] Preferably, the filament composite yarn is composed of polyester elastic fibers and modified polyester fibers, wherein the content of polyester elastic fibers is greater than 50%, and the modified polyester fibers are distributed around the polyester elastic fibers, with a yarn loop height of 0.1-0.3 mm. This yarn provides the fabric with a fluffy feel and elasticity.

[0009] Preferably, the composite yarn is composed of polyamide staple fiber and polyester elastic fiber, wherein the content of polyester elastic fiber is less than 50%, and the polyamide staple fiber is distributed around the polyester elastic fiber, with a yarn loop height of 0.1-0.2 mm. This yarn provides the fabric with a plush and wool-like feel.

[0010] Preferably, the filament composite yarn has a thickness of 60-80D and an F number of 48-80; the long and short fiber composite yarn has a thickness of 130-160D and an F number of 25-33.

[0011] Secondly, the present invention provides a method for producing the above-mentioned wool-like environmentally friendly fabric, comprising the following steps: Step 1, Knitting Process: On a 32-needle double-sided circular knitting machine, the concave part of the fabric is formed by double-sided needle selection knitting, and the convex part is formed by single-sided needle selection knitting. The concave part is knitted with filament composite yarn, and the convex part is knitted with long and short fiber composite yarn. The reverse side of the fabric is knitted with either filament composite yarn or long and short fiber composite yarn according to the hand feel requirements. The yarn length of the convex part is controlled at 200-240mm / 100W, and the yarn length of the concave part is controlled at 190-230mm / 100W, so that the height difference between the concave and convex parts on the fabric surface is 2-3mm. Step 2, finishing process: The woven fabric is scouring, dyeing, soaping, washing, spreading and setting in sequence.

[0012] Preferably, the refining process in the finishing step is an enhanced refining process: using 2g / L of high-efficiency degreasing agent, 1g / L of chelating dispersant, and 6g / L of caustic soda, after heat treatment at 90℃, it is thoroughly washed with water at 60℃, with a machine speed of 30m / min; the refining tank temperatures are 40℃, 60℃, and 85℃ in sequence, and the water washing tank temperatures are 70℃, 60℃, 50℃, and 40℃ in sequence.

[0013] Preferably, in the finishing process, the dyeing uses weakly acidic dyes, cationic dyes, and disperse dyes. A high-temperature leveling agent of 1.0-1.5 g / L is added to the dye bath, and the initial pH value is controlled to be 5.0-5.5 using an acetate-sodium acetate buffer system. The electrolyte dosage is 2-5%. The dyeing process is as follows: add auxiliaries, pH buffer, and leveling agent at 40°C, add dye after dyeing for 5 min, raise the temperature to 110°C at 1°C / min, keep it at that temperature for 30 min, then lower the temperature to below 60°C at 2°C / min, drain and wash with water; add fixing agent, and treat at 80°C for 20 min.

[0014] Preferably, in the finishing process, the soaping agent used is 0.5-1.0 g / L, and the treatment is carried out at 60°C for 20 min to remove the floating color; after soaping, the liquid is drained and the water is changed, and the product is thoroughly rinsed; the setting temperature is 170°C and the time is 60 s.

[0015] Thirdly, the present invention provides the performance indicators of the above-mentioned wool-like environmentally friendly fabric, wherein the quick-drying property of the fabric meets the GB / T 21655.1 standard and the heat retention rate is greater than 30%.

[0016] Fourthly, the present invention provides the application of the above-mentioned wool-like environmentally friendly fabric in the preparation of sweatshirts, jackets or trousers.

[0017] Beneficial effects: Compared with the prior art, the present invention has the following beneficial effects: (1) The present invention uses long filament composite yarn to form a fluffy and elastic feel, and long and short fiber composite yarn to form a plush and wool-like feel. The two work together to make the fabric have an appearance and feel close to natural wool.

[0018] (2) The fabric of the present invention contains more than 65% recycled fiber, which meets environmental protection requirements and reduces production costs.

[0019] (3) Through yarn selection and finishing processes, the present invention enables the fabric to have excellent moisture absorption and quick-drying properties and heat preservation function (heat preservation rate >30%), thus meeting the needs of functional clothing.

[0020] (4) The present invention forms a concave-convex structure by double-sided / single-sided needle knitting with a height difference of 2-3mm, which enhances the three-dimensionality and wool-like effect of the fabric; the reverse side can freely select the yarn type according to the feel, which increases the design flexibility of the product.

[0021] (5) The raw material cost of the present invention is lower than that of natural wool, the production process is controllable, it is suitable for industrial production, and has a good market prospect. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the weaving route of the wool-like environmentally friendly fabric of the present invention. Figure 2 This is a schematic diagram of the soap washing process of the present invention, showing the steps of draining the liquid and changing the water for thorough rinsing after soap washing. Detailed Implementation

[0023] The present invention will be further described below with reference to specific embodiments, but the scope of protection of the present invention is not limited thereto.

[0024] Example 1 like Figure 1 As shown, this embodiment provides a wool-like environmentally friendly fabric, woven on a 32-gauge double-sided circular knitting machine, using the following yarn ratio: (1) Filament composite yarn: 55% polyester elastic fiber, 45% modified polyester fiber, 70D thickness, 64 F number, loop height 0.2mm, accounting for 75% of the total fabric weight; (2) Composite yarn of long and short fibers: 60% polyamide staple fiber and 40% polyester elastic fiber, 145D thickness, F number 29, loop height 0.15mm, accounting for 25% of the total weight of the fabric; (3) Regenerated fiber content: 70%.

[0025] The weaving scheme is as follows: a. Protruding part: woven from composite yarn of long and short fibers, yarn length 220mm / 100W; b. Recessed portion: woven from long filament composite yarn, yarn length 210mm / 100W; c. Reverse side: woven from long filament composite yarn (select according to the desired feel); d. Difference in height between concave and convex surfaces: 2.5mm.

[0026] The subsequent finishing process is as follows: (1) Enhanced refining: 2g / L of high-efficiency degreasing agent, 1g / L of chelating dispersant, 6g / L of caustic soda, heat treatment at 90℃, refining tank temperature 40℃→60℃→85℃, water washing tank temperature 70℃→60℃→50℃→40℃, thorough water washing at 60℃, and machine speed 30m / min.

[0027] (2) Staining: 1.2% owf of weak acid dye, 0.8% owf of cationic dye, 0.5% owf of disperse dye, 1.2 g / L of high temperature leveling agent, pH 5.2 of acetate-sodium acetate buffer system, and 3% electrolyte. Staining curve: Add auxiliaries, buffer solution and leveling agent at 40℃ → stain for 5 min → add dye → heat up to 110℃ at 1℃ / min → keep warm for 30 min → cool down to 60℃ at 2℃ / min → drain and wash with water → add fixing agent and treat at 80℃ for 20 min.

[0028] (3) Soap washing: 0.8g / L soap washing agent, 60℃ for 20min, to wash away the floating color.

[0029] (4) Water washing: Drain the liquid and change the water, wash thoroughly, such as Figure 2 As shown.

[0030] (5) Expanding the distribution.

[0031] (6) Shaping: Shaping temperature 170℃, time 60s.

[0032] The fabric tested showed that its quick-drying properties met the GB / T 21655.1 standard, its heat retention rate was 32%, and it had a wool-like appearance and feel, making it suitable for manufacturing sweatshirts, jackets, and other garments.

[0033] Example 2 This embodiment provides a wool-like environmentally friendly fabric with the following yarn composition: 65% filament composite yarn and 35% long-staple fiber composite yarn. The filament composite yarn has a thickness of 60D and an F number of 48, while the long-staple fiber composite yarn has a thickness of 130D and an F number of 25. The reverse side is woven with long-staple fiber composite yarn, with a height difference of 2.0mm. The rest is the same as in Embodiment 1. The resulting fabric has a heat retention rate of 31%, a soft hand feel, and a strong fleece texture, making it suitable for trousers.

[0034] Example 3 This embodiment provides a wool-like environmentally friendly fabric with the following yarn composition: 85% filament composite yarn and 15% long-staple fiber composite yarn. The filament composite yarn has a thickness of 80D and an F number of 80, while the long-staple fiber composite yarn has a thickness of 160D and an F number of 33. The reverse side is woven with filament composite yarn, with a height difference of 3.0mm. The rest is the same as in Embodiment 1. The resulting fabric has a heat retention rate of 34%, is crisp and well-shaped, and is suitable for jackets.

[0035] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them. Those skilled in the art can modify or make equivalent substitutions to the technical solutions of the present invention without departing from the spirit and scope of the present invention, and such modifications and substitutions should all be covered within the scope of the claims of the present invention.

Claims

1. A wool-like environmentally friendly fabric, characterized in that: The fabric is woven from filament composite yarn and long-short fiber composite yarn, wherein the filament composite yarn accounts for 60-90% of the total weight of the fabric, the long-short fiber composite yarn accounts for 10-40% of the total weight of the fabric, and the recycled fiber content in the fabric is greater than 65%.

2. The wool-like environmentally friendly fabric according to claim 1, characterized in that: The filament composite yarn is composed of polyester elastic fiber and modified polyester fiber, wherein the content of polyester elastic fiber is greater than 50%, and the modified polyester fiber is distributed around the polyester elastic fiber, and the yarn loop height is 0.1-0.3mm.

3. The imitation wool environmentally friendly fabric according to claim 1, characterized in that: The long and short fiber composite yarn is composed of polyamide short fibers and polyester elastic fibers, wherein the content of polyester elastic fibers is less than 50%, the polyamide short fibers are distributed around the polyester elastic fibers, and the yarn loop height is 0.1-0.2mm.

4. The wool-like environmentally friendly fabric according to claim 1, characterized in that: The filament composite yarn has a thickness of 60-80D and an F number of 48-80; the long and short fiber composite yarn has a thickness of 130-160D and an F number of 25-33.

5. A method for producing a wool-like environmentally friendly fabric according to any one of claims 1-4, characterized in that: Includes the following steps: Step 1, Knitting Process: On a 32-needle double-sided circular knitting machine, the concave part of the fabric is formed by double-sided needle selection knitting, and the convex part is formed by single-sided needle selection knitting. The concave part is knitted with filament composite yarn, and the convex part is knitted with long and short fiber composite yarn. The reverse side of the fabric is knitted with either filament composite yarn or long and short fiber composite yarn according to the hand feel requirements. The yarn length of the convex part is controlled at 200-240mm / 100W, and the yarn length of the concave part is controlled at 190-230mm / 100W, so that the height difference between the concave and convex parts on the fabric surface is 2-3mm. Step 2, finishing process: The woven fabric is scouring, dyeing, soaping, washing, spreading and setting in sequence.

6. The method for producing the wool-like environmentally friendly fabric according to claim 5, characterized in that, The refining process in the post-processing stage is an enhanced refining process: using 2g / L of high-efficiency degreasing agent, 1g / L of chelating dispersant, and 6g / L of caustic soda, after heat treatment at 90℃, it is thoroughly washed with water at 60℃, with a machine speed of 30m / min; the refining tank temperatures are 40℃, 60℃, and 85℃ in sequence, and the water washing tank temperatures are 70℃, 60℃, 50℃, and 40℃ in sequence.

7. The method for producing the wool-like environmentally friendly fabric according to claim 5, characterized in that, In the finishing process, weakly acidic dyes, cationic dyes, and disperse dyes are used for dyeing. A high-temperature leveling agent of 1.0-1.5 g / L is added to the dye bath. The initial pH value is controlled at 5.0-5.5 using an acetate-sodium acetate buffer system, and the electrolyte dosage is 2-5%. The dyeing process is as follows: add auxiliaries, pH buffer, and leveling agent at 40°C. After dyeing for 5 minutes, add dye, raise the temperature to 110°C at 1°C / min, keep it at that temperature for 30 minutes, and then lower the temperature to below 60°C at 2°C / min. Drain and wash with water. Add a color-fixing agent and treat at 80℃ for 20 minutes.

8. The method for producing the wool-like environmentally friendly fabric according to claim 5, characterized in that: In the finishing process, the soaping agent is 0.5-1.0 g / L, and the treatment is carried out at 60℃ for 20 minutes to remove the floating color; after soaping, the liquid is drained and the water is changed, and the product is thoroughly rinsed; the setting temperature is 170℃ and the time is 60 seconds.

9. The method for producing the imitation wool environmentally friendly fabric according to claim 5, characterized in that: The quick-drying properties of the fabric meet GB / T 21655.1, and the heat retention rate of the fabric meets GB / T325762, which is greater than 30%.

10. The application of the wool-like environmentally friendly fabric according to claim 9 in the preparation of sweatshirts, jackets or trousers.

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