Non-woven fabric containing lyocell fibers for lining cloth and manufacturing method of non-woven fabric

Abstract

The invention belongs to the technical field of textiles, and particularly relates to a non-woven fabric containing lyocell fibers for lining cloth and a manufacturing method of the non-woven fabric. The non-woven fabric containing the lyocell fibers is formed by mixing lyocell short fibers and low-melting-point short fibers according to a certain proportion and then processing the mixture through a spunlace or needling technology, the mass content of the low-melting-point short fibers is 15%-45%, and the lyocell fibers are subjected to waterproof treatment through a fluoride-free waterproof agent, so that the non-woven fabric has good hydrophobic performance. The non-woven fabric containing the lyocell fibers is mainly used for lining cloth, gluing is not needed in the using process, the lining cloth only needs to be clamped in the middle of a garment material and then subjected to high-temperature hot pressing, and the lining cloth has the advantages of being high in bonding fastness and environmentally friendly and can be used for various garment accessories.

Description

Technical Field

[0001] This invention belongs to the field of textile technology, specifically relating to a nonwoven fabric for lining and its manufacturing method. Background Technology

[0002] Lining is a commonly used garment accessory that plays a role in bonding and supporting the garment during the garment processing. It has a shaping effect on parts such as collars, cuffs, and plackets, and can effectively reduce wrinkles in the garment fabric, making the fabric more crisp. It has a wide range of uses.

[0003] Common interlinings are classified into woven interlinings, knitted interlinings, and non-woven interlinings according to their structure, which can meet the needs of different types of clothing fabrics. The processing procedures for interlinings with different structures are different. Among them, the processing procedure for woven fabrics is the longest, while the processing procedure for non-woven fabrics is the shortest. The difference in processing procedures results in a significant difference in the cost of interlinings.

[0004] Common interlinings are categorized by raw materials, including pure cotton interlinings, polyester interlinings, linen interlinings, and polyester-cotton blend interlinings. The raw materials of the interlining have a significant impact on its performance. Pure cotton and linen interlinings, made from cellulose fibers, have good heat resistance but generally low strength, are prone to wrinkling, and require long processing times and high energy consumption. Polyester interlinings offer high strength and stiffness, and are cost-effective, but polyester shrinks when heated and has poor breathability. Polyester-cotton blend interlinings combine the advantages of both polyester and cotton, but their processing time is also relatively long.

[0005] From a production process perspective, traditional pure cotton woven or knitted interlinings require processes such as spinning, weaving, singeing, scouring, bleaching, resin finishing, and adhesive application. The resins commonly used in resin finishing include various modified urea-formaldehyde resins and dimethylolpropene urea resins, which have a certain formaldehyde release. Additionally, adhesives, including polyethylene, copolyester, copolyamide, and ethylene-vinyl acetate copolymers, need to be dotted onto the interlining surface. Therefore, the traditional interlining processing is not only lengthy but also consumes a large amount of energy, making the production process environmentally unfriendly.

[0006] Traditional nonwoven linings are mostly made of chemical fiber nonwoven fabrics. Their processing is short, and the dimensional stability of nonwoven fabrics, regardless of the raw materials used, is lower than that of woven linings, thus limiting their application.

[0007] Lyocell fiber is a regenerated cellulose fiber produced in an environmentally friendly manner. Compared with natural cellulose fibers such as cotton and linen, lyocell fiber is almost free of impurities, has high whiteness, high strength, and good heat resistance. It does not undergo thermoplastic shrinkage, and its subsequent processing does not require boiling, bleaching, or other processes, resulting in a shorter processing flow. However, lyocell fiber has the characteristic of swelling when it absorbs water.

[0008] Low-melting-point staple fibers, including low-melting-point polyester staple fibers and low-melting-point polyamide staple fibers, are chemical fibers with melting points far lower than conventional polyester. They can partially or completely melt when heated, and after cooling, they can firmly bond other fibers together, making them a green and environmentally friendly adhesive. Summary of the Invention

[0009] To address the technical shortcomings of traditional interlinings in the prior art, this invention proposes a lyocell fiber-containing nonwoven fabric for interlinings and its manufacturing method, the specific technical solution of which is shown below: A nonwoven fabric containing lyocell fibers for use as lining and its manufacturing method, wherein the fabric is made by mixing lyocell short fibers and low melting point short fibers in a certain proportion and then processing them by hydroentangling or needle punching.

[0010] Specifically, the lyocell short fiber has a fineness of 1.0D to 3.0D and a length of 25mm to 80mm, with a preferred fineness of 1.2D to 1.5D and a length of 38mm to 51mm.

[0011] Specifically, the lyocell fibers are pretreated with a fluorine-free waterproofing agent before being processed into nonwoven fabric, giving them hydrophobic properties. The fluorine-free waterproofing agent includes acrylic waterproofing agents, polyurethane waterproofing agents, etc. The specific processing procedure is as follows: the lyocell short fibers are soaked in a certain concentration of fluorine-free waterproofing agent, and then dehydrated and dried. The drying temperature is 130℃~180℃, and the drying process is a loose hot air drying to avoid the lyocell fibers from sticking together and to ensure that the lyocell fibers have good combable properties in subsequent processing.

[0012] Specifically, the chemical composition of the low-melting-point short fiber is low-melting-point polyester fiber or low-melting-point polyamide fiber, with a fineness of 1.0D to 5.0D, a length of 30mm to 60mm, and a melting point of 110℃ to 180℃. The preferred fineness is 1.5D to 3.0D, and the preferred length is 38mm to 51mm. The low-melting-point short fiber includes single-component low-melting-point short fiber, core-sheath composite low-melting-point short fiber, etc.

[0013] Specifically, the nonwoven fabric contains two or more low-melting-point short fibers with different melting points, the melting point difference between the various low-melting-point short fibers is not less than 20°C, and the total mass percentage of the various low-melting-point short fibers in the nonwoven fabric is 15% to 45%.

[0014] Specifically, the processing method for nonwoven fabric is needle punching or hydroentangling. The weight per square meter of nonwoven fabric is 30g to 200g. Lyocell short fibers and low melting point short fibers are mixed in a set ratio and fed into nonwoven fabric processing equipment. After being combed into a web, it is needle punched or hydroentangled to strengthen it, and then rolled and packaged to obtain the finished product.

[0015] Specifically, when used as a lining, it does not require glue. It can be simply sandwiched between the garment fabrics and then hot-pressed at a high temperature of 130-200℃ for 30-120 seconds.

[0016] The beneficial effects of this invention are as follows: This invention uses lyocell short fibers as the main skeleton material, which are formed by needle punching or hydroentanglement nonwoven fabric processing. The fibers have high strength, low impurity content, and short processing flow.

[0017] This invention pretreats lyocell fibers with a fluorine-free waterproofing agent, giving them hydrophobic properties and significantly improving their tendency to absorb water and swell, causing dimensional changes.

[0018] This invention uses two or more low-melting-point short fibers with different melting points as adhesives, which has a wider range of processing temperature adaptability and can be adapted to different application fields. The bonding process is emission-free and environmentally friendly. Moreover, the number of low-melting-point short fibers involved in the bonding can be controlled by adjusting the hot pressing temperature, so as to achieve the goal of controlling the bonding strength and the stiffness of the lining. Detailed Implementation

[0019] The present invention will be further described below with reference to the embodiments. The embodiments described are only for further explanation of the present invention and do not limit the present invention. Example 1

[0020] 1.2D*38mm lyocell short fibers were soaked in 50g / L acrylic fluorine-free waterproofing agent, dehydrated, and then sent to a hot air dryer for loose drying at 130℃ to obtain hydrophobic lyocell short fibers.

[0021] 60 parts of hydrophobically treated lyocell short fibers, 20 parts of 1.5D*38mm single-component low-melting-point polyester fibers with a melting point of 110℃, and 20 parts of 3.0D*38mm core-sheath structure low-melting-point polyester fibers were mixed.

[0022] The mixed fiber raw materials are fed into the needle-punched nonwoven fabric processing equipment.

[0023] The mixed fiber raw materials are processed in a needle-punched nonwoven fabric processing equipment through processes such as opening, carding, web laying, needle punching reinforcement, and surface calendering to obtain a needle-punched nonwoven fabric with a weight of 100g per square meter.

[0024] The obtained needle-punched nonwoven fabric is cut and rolled to obtain a lyocell fiber-containing nonwoven fabric for use as a lining.

[0025] The heat bonding temperature of the lining is 130℃~150℃. After being bonded to the fabric, the dry heat dimensional change rate is within -0.5% to +0.2%, and the water washing dimensional change rate is within -0.8% to +0.3%. Example 2

[0026] 1.5D*51mm lyocell short fibers were soaked in a solution prepared with 30g / L acrylic fluorine-free waterproofing agent and 30g / L polyurethane waterproofing agent. After dehydration, the fibers were sent to a hot air dryer and loosely dried at 150℃ to obtain hydrophobic lyocell short fibers.

[0027] 65 parts of hydrophobically treated lyocell short fibers, 20 parts of 1.0D*51mm single-component low-melting-point polyester fibers with a melting point of 110℃, and 15 parts of 5.0D*51mm core-sheath structure low-melting-point polyester fibers were mixed.

[0028] The mixed fiber raw materials are fed into the spunlace nonwoven fabric processing equipment.

[0029] The mixed fiber raw materials are processed in a spunlace nonwoven fabric processing equipment through processes such as opening, carding, web laying, spunlace reinforcement, and drying to obtain a spunlace nonwoven fabric with a weight of 50g per square meter.

[0030] The obtained spunlace nonwoven fabric is cut and rolled to obtain a lyocell fiber-containing nonwoven fabric for use as a lining.

[0031] The heat bonding temperature of the lining is 130℃~170℃. After being bonded to the fabric, the dry heat dimensional change rate is within -0.4% to +0.3%, and the water washing dimensional change rate is within -1.0% to +0.6%. Example 3

[0032] 3.0D*76mm lyocell short fibers were soaked in 40g / L polyurethane-based fluorine-free waterproofing agent, dehydrated, and then sent to a hot air dryer for loose drying at 150℃ to obtain hydrophobic lyocell short fibers.

[0033] 70 parts of hydrophobically treated lyocell short fibers, 20 parts of 2.0D*51mm single-component low-melting-point polyester fibers with a melting point of 130℃, and 10 parts of 3.0D*51mm core-sheath structure low-melting-point polyester fibers were mixed.

[0034] The mixed fiber raw materials are fed into the needle-punched nonwoven fabric processing equipment.

[0035] The mixed fiber raw materials are processed in a needle-punched nonwoven fabric processing equipment through processes such as opening, carding, web laying, needle punching reinforcement, and surface calendering to obtain a needle-punched nonwoven fabric with a weight of 90g per square meter.

[0036] The obtained needle-punched nonwoven fabric is cut and rolled to obtain a lyocell fiber-containing nonwoven fabric for use as a lining.

[0037] The heat bonding temperature of the lining is 145℃~195℃. After being bonded to the fabric, the dry heat dimensional change rate is within -0.3% to +0.3%, and the water washing dimensional change rate is within -1.0% to +0.5%.

[0038] The above are all preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any changes in fiber specifications, raw material ratios, etc. made in accordance with the present invention should be covered within the scope of protection of the present invention.

Claims

1. A nonwoven fabric containing lyocell fibers for use as a lining and a method for manufacturing the same, characterized in that, Lyocell fiber nonwoven fabric is made by mixing lyocell short fibers and low melting point short fibers in a certain proportion and then processing them through hydroentangling or needle punching processes.

2. The nonwoven fabric containing lyocell fibers for lining and its manufacturing method according to claim 1, characterized in that, The lyocell short fibers have a fineness of 1.0D to 3.0D and a length of 25mm to 80mm, with a preferred fineness of 1.2D to 1.5D and a preferred length of 38mm to 51mm.

3. The nonwoven fabric containing lyocell fibers for lining and its manufacturing method according to claim 1, characterized in that, The lyocell fiber is pretreated with a fluorine-free waterproofing agent before being processed into nonwoven fabric, giving it hydrophobic properties. The fluorine-free waterproofing agent includes acrylic waterproofing agents, polyurethane waterproofing agents, etc.

4. The nonwoven fabric containing lyocell fibers for lining and its manufacturing method according to claim 1, characterized in that, The chemical composition of the low-melting-point short fiber is low-melting-point polyester fiber or low-melting-point polyamide fiber, with a fineness of 1.0D to 5.0D, a length of 30mm to 60mm, and a melting point of 110℃ to 180℃.

5. The nonwoven fabric containing lyocell fibers for lining and its manufacturing method according to claim 1, characterized in that, The nonwoven fabric contains two or more low-melting-point short fibers with different melting points, the melting point difference between the various low-melting-point short fibers is not less than 20°C, and the mass percentage of low-melting-point short fibers in the nonwoven fabric is 15% to 45%.

6. The nonwoven fabric containing lyocell fibers for lining and its manufacturing method according to claim 1, characterized in that, Nonwoven fabrics are processed by needle punching or hydroentangling, and their weight per square meter ranges from 30g to 200g.

7. The nonwoven fabric containing lyocell fibers for lining and its manufacturing method according to claim 1, characterized in that, When used as a lining, it does not require glue. Simply sandwich the lining between the garment fabrics and heat press it at a high temperature of 130-200℃ for 30-120 seconds.