Polyester filament and lyocell fiber interwoven fabric and preparation method

Abstract

The application provides a polyester filament and lyocell fiber interwoven fabric and a preparation method. The polyester filament and lyocell fiber interwoven fabric is a knitted fabric, comprising a polyester filament surface layer, a lyocell yarn inner layer and a lyocell yarn middle layer. The polyester filament surface layer is knitted by using supercritical carbon dioxide waterless dyed polyester filament, the lyocell fiber yarn is lyocell fiber colored spun yarn, the lyocell yarn inner layer is knitted by using lyocell fiber colored spun yarn, and the lyocell fiber colored spun yarn is used as a connecting line to connect the polyester filament surface layer and the lyocell yarn inner layer into an integrated whole. The application avoids damage to the lyocell fiber caused by high-temperature setting in the finishing process, thereby affecting the quality of the fabric, and solves the problem of fibrillation and pilling of the polyester filament and lyocell fiber interwoven fabric which is difficult to recover caused by the existing preparation process. The dyeing and finishing process is simple, the production cost is low, and the efficiency is high.

Description

Technical Field

[0001] This invention belongs to the field of textile product technology, and relates to knitted fabric products and their processing methods, specifically a polyester filament and lyocell fiber interwoven fabric and its preparation method. Background Technology

[0002] As people's living standards continue to improve, they are paying more attention to the green and environmentally friendly aspects of clothing and its wearing comfort. In order to meet people's demand for green and environmentally friendly textile products and wearing comfort, fabrics interwoven with polyester filament and lyocell fiber have been developed.

[0003] The existing weaving and dyeing processes for polyester filament and lyocell fiber interwoven fabrics mainly include the following two preparation methods: First, weave the cloth, then dye it. 1. Polyester filament and lyocell fiber yarn are woven into fabric according to a certain process, with polyester on the surface and lyocell yarn as the connecting thread. The terry yarn is made of lyocell yarn. 2. Then dye and finish the fabric.

[0004] II. Dyeing first, then weaving the fabric. 1. First, dye the polyester filament and lyocell fiber yarn separately; 2. Then proceed with fabric production; 3. Finally, perform finishing touches and final shaping.

[0005] The above preparation process has the following problems and shortcomings: 1. Fabrics containing polyester must be set at 200℃. Otherwise, unset polyester fabrics are prone to indelible creases and indentations during weaving, overflow dyeing and storage. 2. Polyester and Lyocell are two different fibers with different compositions, so they need to be dyed twice. First, disperse dyes are used to dye the polyester at high temperature, and then reactive dyes are used to dye the Lyocell yarn at room temperature. 3. Without high-temperature setting, the shrinkage rate of polyester affects the smoothness of the fabric. Double dyeing takes a long time. Lyocell fiber is an environmentally friendly regenerated cellulose fiber. When dyed simultaneously with polyester, Lyocell fiber is prone to fibrillation, fiber splitting, and excessive fuzz on the fabric surface, resulting in pilling and fuzziness that fails to meet standard requirements. The fibrillation problem of Lyocell fiber knitted fabrics is a current challenge in the domestic and international knitted fabric industry, and there is no mature solution yet. Foreign Lyocell fibers are processed using cross-linking agents, which does not conform to environmental protection principles and cannot be used in infant and children's clothing.

[0006] Therefore, designing a polyester filament and lyocell interwoven fabric and its preparation method, with a reasonable dyeing and finishing process to avoid damage to the lyocell fibers during high-temperature setting and thus affect fabric quality, and solving the problems of fibrillation and pilling that are difficult to reverse in existing polyester filament and lyocell interwoven fabrics, are all technical problems that urgently need to be solved in this field. Summary of the Invention

[0007] To address the aforementioned problems and shortcomings of existing technologies, this invention provides a polyester filament and lyocell fiber interwoven fabric and its preparation method. The raw materials and finishing processes used are reasonable, avoiding damage to the lyocell fibers caused by high-temperature setting during finishing, which would affect the quality of the fabric. This invention also solves the problems of fibrillation and pilling on the surface of polyester filament and lyocell fiber interwoven fabrics caused by existing preparation processes.

[0008] To achieve the above-mentioned objectives of this invention, the present invention adopts the following technical solution: A polyester filament and lyocell fiber interwoven fabric is disclosed. The polyester filament and lyocell fiber interwoven fabric is a knitted fabric, comprising a polyester filament outer layer, a lyocell yarn inner layer, and a lyocell yarn intermediate layer. The polyester filament outer layer is woven from polyester filament dyed with supercritical carbon dioxide anhydrous dyes, the lyocell fiber yarn is lyocell fiber colored spun yarn, the lyocell yarn inner layer is woven from lyocell fiber colored spun yarn, and the lyocell fiber colored spun yarn is used as a connecting thread to form the intermediate layer, connecting the polyester filament outer layer and the lyocell yarn inner layer together.

[0009] Improvement to the above technical solution: The polyester filament and lyocell fiber interwoven fabric contains 30%-70% by weight of polyester filament and 70%-30% by weight of lyocell yarn.

[0010] Further improvements to the above technical solution: The polyester filament and lyocell fiber interwoven fabric is a three-layer knitted fabric with a sandwich structure. The outer layer of the polyester filament fabric is a single-sided jersey fabric, and the inner layer of the lyocell yarn is a terry fabric. The polyester filament outer layer and the lyocell yarn inner layer are connected by loops to form an elastic three-layer knitted fabric.

[0011] Further improvement to the above technical solution: The lyocell fiber spun yarn is made by blending 5%-15% by weight of black lyocell fiber with 95%-85% by weight of lyocell virgin fiber.

[0012] Further improvements to the above technical solution: the polyester filament used in the outer layer is 50-150D / 36-144F, and the lyocell fiber yarn is 20-40S yarn.

[0013] A method for preparing the above-mentioned polyester filament and lyocell fiber interwoven fabric includes a fabric weaving process step and a finishing process step, characterized in that the fabric weaving process step includes: Step S1: Prepare supercritical carbon dioxide anhydrous dyed polyester filament as the raw material for the outer layer of polyester filament, and prepare lyocell fiber colored yarn as the raw material for the inner layer and middle layer of lyocell yarn. Step S2: Use knitting equipment to knit a fabric that is a blend of polyester filament and lyocell fiber, consisting of a polyester filament outer layer, a lyocell yarn middle layer, and a lyocell yarn inner layer. The finishing process steps include: airflow finishing and stenter stretching. Airflow finishing: transverse elongation 10%-30%, temperature 80-100℃, 10-30 minutes; stenter stretching: 80℃, add softener, zero transverse overfeed.

[0014] Improvement to the above technical solution: The lyocell fiber spun yarn is made by blending 10% by weight of black lyocell fiber with 90% by weight of lyocell virgin fiber.

[0015] Further improvements to the above technical solution: the polyester filament outer layer uses polyester filament with a specification of 150D / 144F, the middle layer uses lyocell fiber colored yarn with a specification of 40SJK colored yarn, and the inner layer loop yarn uses lyocell fiber colored yarn with a specification of 20S / 2 colored yarn.

[0016] Compared with the prior art, the present invention has the following advantages and positive effects: 1. This invention uses polyester filament dyed with supercritical carbon dioxide to weave a polyester filament outer layer, and a lyocell yarn inner layer woven with lyocell fiber colored yarn. The lyocell fiber colored yarn is used as the connecting thread to form the middle layer, connecting the polyester filament outer layer and the lyocell yarn inner layer into a three-layer knitted fabric, which is comfortable to wear as underwear fabric. 2. This invention uses supercritical carbon dioxide anhydrous dyeing of polyester filament as the main raw material, making the product more environmentally friendly; it solves the energy and water consumption problems caused by dyeing all fibers during traditional processes. Lyocell fiber spun yarn is made by blending black lyocell fiber with virgin lyocell fiber. The use of the inner layer of white yarn, without dyeing or bleaching, aligns with consumers' health, low-carbon, and environmentally friendly concepts, promoting a natural and eco-friendly approach to clothing. It enhances the color depth of the fabric, creating a three-dimensional, floating effect that conforms to current fabric trends. The middle and inner terry yarns are also made of lyocell fiber, which is a regenerated cellulose fiber produced using a solvent-based process. The solvent is recycled and reused, making it a green and environmentally friendly fiber. Lyocell fiber is produced from wood pulp, free from impurities and ash found in cotton fibers, resulting in a pure white, soft fabric with excellent skin-friendliness. The fabric only requires simple washing and low-temperature setting, minimizing energy consumption in the entire fabric production process.

[0017] 3. The method for preparing polyester filament and lyocell fiber interwoven fabric of the present invention combines reasonable selection of raw materials, design of fabric structure and optimization of finishing process to prepare polyester filament and lyocell fiber interwoven fabric. It avoids the damage to lyocell fiber caused by high temperature setting during finishing process, which affects the quality of fabric. It solves the problems of fibrillation and pilling of polyester filament and lyocell fiber interwoven fabric caused by existing preparation process. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the weaving structure of a polyester filament and lyocell fiber interwoven fabric according to the present invention. Detailed Implementation

[0019] See Figure 1 This invention relates to an embodiment 1 of a polyester filament and lyocell fiber interwoven fabric. The polyester filament and lyocell fiber interwoven fabric is a knitted fabric, comprising a polyester filament outer layer, a lyocell yarn inner layer, and a lyocell yarn intermediate layer. The polyester filament outer layer is woven from polyester filament dyed with supercritical carbon dioxide anhydrous dye. The lyocell fiber yarn is lyocell fiber colored spun yarn. The lyocell yarn inner layer is woven from lyocell fiber colored spun yarn. The lyocell fiber colored spun yarn is used as a connecting thread to form the intermediate layer, connecting the polyester filament outer layer and the lyocell yarn inner layer into one piece.

[0020] Furthermore, the polyester filament and lyocell interwoven fabric contains 30% by weight polyester filament and 70% by weight lyocell yarn.

[0021] Furthermore, the aforementioned lyocell fiber colored yarn is made by blending 10% by weight of black lyocell fiber with 90% by weight of lyocell virgin fiber.

[0022] Furthermore, the polyester filament used in the outer layer is 150D / 144F, the lyocell fiber yarn used in the middle layer is 40SJK yarn, and the lyocell fiber yarn used in the inner layer is 20S / 2 yarn.

[0023] Specifically: The above-mentioned polyester filament and lyocell fiber interwoven fabric is a three-layer knitted fabric with a sandwich structure. The outer layer of the polyester filament fabric is a single-sided jersey fabric, and the inner layer of the lyocell yarn is a terry fabric. The polyester filament outer layer and the lyocell yarn inner layer are connected by loops to form an elastic three-layer knitted fabric.

[0024] Figure 1 Specific explanation: 1*2 terry 24G: This refers to the knitted fabric of sweatshirts and sweatpants. It is knitted on a 24-gauge circular knitting machine. Every two needles, one needle forms a loop, and each row continues with one needle. The terry has a twill appearance. Each row is knitted with three yarns, including the outer layer (bottom layer), the inner layer (terry), and the middle layer (connecting layer) that connects the outer layer and the inner layer.

[0025] Connector (intermediate layer): 40SJK Lyocell fiber heather gray (color code B10), JK indicates combed yarn, heather gray (color code B10) indicates yarn containing 10% black Lyocell fiber and 90% Lyocell raw fiber.

[0026] This invention provides an embodiment 2 of a polyester filament and lyocell fiber interwoven fabric. The polyester filament and lyocell fiber interwoven fabric is a knitted fabric, comprising a polyester filament outer layer, a lyocell yarn inner layer, and a lyocell yarn intermediate layer. The polyester filament outer layer is woven from polyester filament dyed with supercritical carbon dioxide anhydrous dye. The lyocell fiber yarn is lyocell fiber colored spun yarn. The lyocell yarn inner layer is woven from lyocell fiber colored spun yarn. The lyocell fiber colored spun yarn is used as a connecting thread to form the intermediate layer, connecting the polyester filament outer layer and the lyocell yarn inner layer into one piece.

[0027] Furthermore, the polyester filament and lyocell interwoven fabric contains 50% by weight polyester filament and 50% by weight lyocell yarn.

[0028] Furthermore, the aforementioned lyocell fiber colored yarn is made by blending 5% by weight of black lyocell fiber with 95% by weight of lyocell virgin fiber.

[0029] Furthermore, the polyester filament used in the outer layer of the aforementioned polyester filament is 100D / 92F, and the lyocell fiber colored yarn is 30S colored yarn.

[0030] Specifically: The above-mentioned polyester filament and lyocell fiber interwoven fabric is a three-layer knitted fabric with a sandwich structure. The outer layer of the polyester filament fabric is a single-sided jersey fabric, and the inner layer of the lyocell yarn is a terry fabric. The polyester filament outer layer and the lyocell yarn inner layer are connected by loops to form an elastic three-layer knitted fabric.

[0031] This invention relates to a third embodiment of a polyester filament and lyocell fiber interwoven fabric. The polyester filament and lyocell fiber interwoven fabric is a knitted fabric, comprising a polyester filament outer layer, a lyocell yarn inner layer, and a lyocell yarn intermediate layer. The polyester filament outer layer is woven from polyester filament dyed with supercritical carbon dioxide anhydrous dye. The lyocell fiber yarn is lyocell fiber colored spun yarn. The lyocell yarn inner layer is woven from lyocell fiber colored spun yarn. The lyocell fiber colored spun yarn is used as a connecting thread to form the intermediate layer, connecting the polyester filament outer layer and the lyocell yarn inner layer into one piece.

[0032] Furthermore, the polyester filament and lyocell interwoven fabric contains 70% by weight polyester filament and 30% by weight lyocell yarn.

[0033] Furthermore, the aforementioned lyocell fiber colored yarn is made by blending 15% by weight of black lyocell fiber with 85% by weight of lyocell virgin fiber.

[0034] Furthermore, the polyester filament used in the outer layer of the aforementioned polyester filament is 50D / 36F, and the lyocell fiber colored yarn is 20S colored yarn.

[0035] Specifically: The above-mentioned polyester filament and lyocell fiber interwoven fabric is a three-layer knitted fabric with a sandwich structure. The outer layer of the polyester filament fabric is a single-sided jersey fabric, and the inner layer of the lyocell yarn is a terry fabric. The polyester filament outer layer and the lyocell yarn inner layer are connected by loops to form an elastic three-layer knitted fabric.

[0036] The present invention discloses a specific method for preparing the polyester filament and lyocell fiber interwoven fabric of Embodiment 1 above, comprising a fabric weaving process step and a finishing process step, wherein the fabric weaving process step includes: Step S1: Prepare supercritical carbon dioxide anhydrous dyed polyester filament as the raw material for the outer layer of polyester filament, and prepare lyocell fiber colored yarn as the raw material for the inner layer and middle layer of lyocell yarn. Step S2: Use knitting equipment to knit a fabric that is a blend of polyester filament and lyocell fiber, consisting of a polyester filament outer layer, a lyocell yarn middle layer, and a lyocell yarn inner layer. The finishing process steps include: airflow finishing and stenter stretching. Airflow finishing: transverse elongation 10%-30%, temperature 80-100℃, 10-30 minutes; stenter stretching: 80℃, add softener, zero transverse overfeed.

[0037] The present invention discloses a specific method for preparing the polyester filament and lyocell fiber interwoven fabric of Embodiment 2 above, comprising a fabric weaving process step and a finishing process step, wherein the fabric weaving process step includes: Step S1: Prepare supercritical carbon dioxide anhydrous dyed polyester filament as the raw material for the outer layer of polyester filament, and prepare lyocell fiber colored yarn as the raw material for the inner layer and middle layer of lyocell yarn. Step S2: Use knitting equipment to knit a fabric that is a blend of polyester filament and lyocell fiber, consisting of a polyester filament outer layer, a lyocell yarn middle layer, and a lyocell yarn inner layer. The finishing process steps include: airflow finishing and stenter stretching. Airflow finishing: transverse elongation 10%-30%, temperature 80-100℃, 10-30 minutes; stenter stretching: 80℃, add softener, zero transverse overfeed.

[0038] The present invention discloses a specific method for preparing the polyester filament and lyocell fiber interwoven fabric of Embodiment 3 above, comprising a fabric weaving process step and a finishing process step, wherein the fabric weaving process step includes: Step S1: Prepare supercritical carbon dioxide anhydrous dyed polyester filament as the raw material for the outer layer of polyester filament, and prepare lyocell fiber colored yarn as the raw material for the inner layer and middle layer of lyocell yarn. Step S2: Use knitting equipment to knit a fabric that is a blend of polyester filament and lyocell fiber, consisting of a polyester filament outer layer, a lyocell yarn middle layer, and a lyocell yarn inner layer. The finishing process steps include: airflow finishing and stenter stretching. Airflow finishing: transverse elongation 10%-30%, temperature 80-100℃, 10-30 minutes; stenter stretching: 80℃, add softener, zero transverse overfeed.

[0039] Of course, the above description is not intended to limit the present invention, and the present invention is not limited to the examples given above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present invention should also fall within the protection scope of the present invention.

Claims

1. A polyester filament and lyocell fiber interwoven fabric, wherein the polyester filament and lyocell fiber interwoven fabric is a knitted fabric, comprising a polyester filament outer layer, a lyocell yarn inner layer, and a lyocell yarn middle layer, characterized in that, The outer layer of the polyester filament is woven from polyester filament dyed with supercritical carbon dioxide anhydrous dye, and the lyocell fiber yarn is lyocell fiber colored spun yarn. The inner layer of the lyocell yarn is woven from lyocell fiber colored spun yarn, and the lyocell fiber colored spun yarn is used as the connecting thread to form the intermediate layer, connecting the outer layer of the polyester filament and the inner layer of the lyocell yarn into one piece. The polyester filament and lyocell fiber interwoven fabric contains 30%-70% by weight of polyester filament and 70%-30% by weight of lyocell yarn. The yarn; the polyester filament and lyocell fiber interwoven fabric is a three-layer knitted fabric with a sandwich structure. The outer layer of the polyester filament fabric is a single-sided jersey weave, and the inner layer of the lyocell yarn is a terry loop weave. The polyester filament outer layer and the lyocell yarn inner layer are connected by loops to form an elastic three-layer knitted fabric. The lyocell fiber colored yarn is a blend of 5%-15% by weight of black lyocell fiber and 95%-85% by weight of lyocell virgin fiber.

2. The polyester filament and lyocell fiber interwoven fabric according to claim 1, characterized in that, The polyester filament used in the outer layer has a specification of 50-150D / 36-144F, and the lyocell fiber yarn has a specification of 20-40S yarn.

3. A method for preparing a polyester filament and lyocell fiber interwoven fabric as described in claim 1 or 2, comprising a fabric weaving process step and a finishing process step, characterized in that, The fabric weaving process includes the following steps: Step S1: Prepare supercritical carbon dioxide anhydrous dyed polyester filament as the raw material for the outer layer of polyester filament, and prepare lyocell fiber colored yarn as the raw material for the inner layer and middle layer of lyocell yarn. Step S2: Use knitting equipment to knit a fabric that is a blend of polyester filament and lyocell fiber, consisting of a polyester filament outer layer, a lyocell yarn middle layer, and a lyocell yarn inner layer. The finishing process steps include: airflow finishing and stenter stretching. Airflow finishing: transverse elongation 10%-30%, temperature 80-100℃, 10-30 minutes; stenter stretching: 80℃, add softener, zero transverse overfeed.

4. The method for preparing a polyester filament and lyocell fiber interwoven fabric according to claim 3, characterized in that, The lyocell fiber spun yarn is made by blending 10% by weight of black lyocell fiber with 90% by weight of lyocell virgin fiber.

5. The method for preparing a polyester filament and lyocell fiber interwoven fabric according to claim 3 or 4, characterized in that, The polyester filament outer layer uses polyester filament with a specification of 150D / 144F, the lyocell yarn middle layer uses lyocell fiber colored yarn with a specification of 40SJK colored yarn, and the lyocell yarn inner layer uses lyocell fiber colored yarn with a specification of 20S / 2 colored yarn.

Images