阅读说明：本技术 一种弹性面料及其制备方法 (Elastic fabric and preparation method thereof ) 是由 邹可权 于 2019-10-28 设计创作，主要内容包括：本发明属于纺织面料领域,公开了一种弹性面料,其特征在于,包括基层面料及固化在基层面料上的聚氨基甲酸酯层；本发明还公开了该弹性面料的制备方法。本发明的目的在于提供一种弹性面料及其制备方法,采用液态的聚氨基甲酸酯纤维,加入添加剂,通过丝网印刷的方式将聚氨基甲酸酯纤维层直接附着在基层面料上,工艺简单,成本低,且所制得的面料特定区域具有高弹性及优良的回复力。(The invention belongs to the field of textile fabrics, and discloses an elastic fabric which is characterized by comprising a base fabric and a polyurethane layer solidified on the base fabric; the invention also discloses a preparation method of the elastic fabric. The invention aims to provide an elastic fabric and a preparation method thereof.)

1. An elastic fabric is characterized by comprising a base fabric and a polyurethane layer solidified on the base fabric.

2. The elastic fabric according to claim 1, wherein the polyurethane layer comprises, by weight, 94-96 parts of polyurethane fiber, 1-3 parts of curing agent, and 0.5-2 parts of penetrating agent; the polyurethane fiber is in liquid state.

3. The elastic fabric according to claim 2, wherein the polyurethane layer comprises 94 parts by weight of polyurethane fiber, 1.5 parts by weight of curing agent and 1 part by weight of penetrant.

4. An elastic fabric according to claim 2 or 3, wherein the curing agent is dimethylpentanediamine and the penetrant is sodium secondary alkyl sulfate.

5. A method of making an elastic fabric according to any of claims 1 to 4, comprising the steps of:

A. prefabricating slurry;

B. and (4) screen printing and baking.

6. The method for preparing the elastic fabric according to claim 5, wherein the step A comprises the following steps:

1) stirring the polyurethane fibers in the container at a stirring speed of not higher than 60 rpm;

2) adding curing agent and penetrant into the container in batches, and continuously stirring until the mixture is uniform for later use.

7. The method for preparing the elastic fabric according to claim 5, wherein the step B comprises the following steps:

1) placing the base layer fabric on a printing table board, tightly attaching to the printing table board, and paving;

2) placing the printing bedplate attached with the base fabric below the screen printing plate, pouring the slurry prepared in the step A into one end of the screen printing plate, applying pressure on the slurry on the screen printing plate by using a scraper, and moving towards the other end of the screen printing plate to finish one-layer printing;

3) primarily baking the base fabric with the printing bedplate after the printing of one layer;

4) placing the primarily baked base layer fabric below the silk screen printing plate again, repeating the step 2), finishing two-layer printing, and repeating the step 3), and repeating the steps until a plurality of layers of printing are finished;

5) taking down the plurality of layers of printed base layer fabrics finished in the step 4) from the printing plate, and placing the base layer fabrics in an oven for final baking.

8. The method for preparing the elastic fabric according to claim 7, wherein the mesh number of the screen printing plate in the step 2) is 110-140 meshes, the scraper in the step 2) is a polyurethane scraper with the hardness of 70, and the pressure of the scraper is 2-4 bar.

9. The method for preparing elastic fabric according to claim 7, wherein the temperature of the preliminary baking in step 3) is 120-150 ℃ and the time is 30-40 seconds; the final baking temperature in the step 5) is 130-.

Technical Field

The invention relates to the field of textile fabrics, in particular to an elastic fabric and a preparation method thereof.

Background

The polyurethane fiber has the characteristics of super-strong stretching and recovery capability, small fineness, high strength, small density, good dyeability, good color fastness and the like, and is widely used for preparing various elastic fabrics. At present, the elastic fabric is basically made by blending or interweaving formed and cured polyurethane fiber yarns and other fabric fiber components, and has high elasticity and high restoring force, and is mainly used for knee pads, waist supports, body shaping and other products with high elasticity requirements on the fabric. Along with the development of the society, the demand for body building and shaping is continuously rising, and the demand for elastic fabrics is also increasing.

However, the existing preparation method of blending or interweaving solid polyurethane fiber yarns and other textile fibers has balanced elasticity. The functional requirements of the clothing are more and more, and the elasticity balance of the common fabric can not meet the different requirements of the functional clothing on the elasticity of special parts.

Disclosure of Invention

The invention aims to provide an elastic fabric and a preparation method thereof, wherein liquid polyurethane fiber is adopted, an additive is added, and a polyurethane fiber layer is directly attached to a base fabric in a screen printing mode.

The technical scheme provided by the invention is as follows: an elastic fabric comprises a base fabric and a polyurethane layer solidified on the base fabric.

In the elastic fabric, the polyurethane layer comprises the following components, by weight, 94-96 parts of polyurethane fiber, 1-3 parts of curing agent and 0.5-2 parts of penetrating agent; the polyurethane fiber is in liquid state.

In the elastic fabric, the polyurethane layer comprises 94 parts by weight of polyurethane fiber, 1.5 parts by weight of curing agent and 1 part by weight of penetrating agent.

In the elastic fabric, the curing agent is dimethyl pentanediamine, and the penetrating agent is sodium secondary alkyl sulfate. The preparation method of the elastic fabric is characterized by comprising the following steps:

A. prefabricating slurry;

B. and (4) screen printing and baking.

In the above method for preparing an elastic fabric, the step a includes the steps of:

1) stirring the polyurethane fibers in the container at a stirring speed of not higher than 60 rpm;

2) adding curing agent and penetrant into the container in batches, and continuously stirring until the mixture is uniform for later use;

in the above method for preparing an elastic fabric, the step B includes the steps of:

1) placing the base layer fabric on a printing table board, tightly attaching to the printing table board, and paving;

2) placing the printing bedplate attached with the base fabric below the screen printing plate, pouring the slurry prepared in the step A into one end of the screen printing plate, applying pressure on the slurry on the screen printing plate by using a scraper, and moving towards the other end of the screen printing plate to finish one-layer printing;

3) primarily baking the base fabric with the printing bedplate after the printing of one layer;

4) placing the primarily baked base layer fabric below the silk screen printing plate again, repeating the step 2), finishing two-layer printing, and repeating the step 3), and repeating the steps until a plurality of layers of printing are finished;

5) taking down the plurality of layers of printed base layer fabrics finished in the step 4) from the printing plate, and placing the base layer fabrics in an oven for final baking. In the above method for preparing the elastic fabric, the mesh number of the screen printing plate in the step 2) is 110-140 meshes, the scraper in the step 2) is a polyurethane scraper with the hardness of 70, and the pressure of the scraper is 2-4 bar.

In the preparation method of the elastic fabric, the temperature of the primary baking in the step 3) is 120-150 ℃, and the time is 30-40 seconds; the final baking temperature in the step 5) is 130-.

Compared with the prior art, the invention has the beneficial effects that:

(1) compared with the traditional method, the method adopts the liquid polyurethane fiber, so that the performance of the fabric is improved by adding some curing agents, coloring agents or other functional auxiliaries, the mixing is more uniform, and the effect is more prominent;

(2) the penetrant is added into the liquid polyurethane fiber, so that the polyurethane fiber can better permeate into the fabric, and the elasticity and the restoring force of the fabric are improved; adding a curing agent into the liquid polyurethane fiber to enable the liquid polyurethane fiber to be adhered to the fabric and be cured and molded to form a uniform coating;

(3) the liquid polyurethane fiber slurry is printed on the cloth layer by adopting a screen printing mode, the number of printed layers can be determined according to the actual requirement on the elasticity of the fabric, and the elasticity degree is easy to control; in addition, by designing and manufacturing a specific silk screen printing plate, a specific pattern can be printed and formed on a specific position of the base fabric, and the aim of locally increasing elasticity can be fulfilled. So that different parts of the fabric have different elastic moduli, and the requirements of the functional garment on different elastic forces of different parts of the fabric are met.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to specific embodiments, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The polyurethane fiber is 58D lycra of Invidago, and is added in batches when a curing agent or a penetrating agent is added when liquid polyurethane fiber is used for preparing slurry, and the stirring speed is controlled to be not more than 60rpm at most when manual or mechanical stirring is adopted so as to avoid generating bubbles, and if bubbles are formed, the polyurethane fiber is kept stand for 1 to 2 hours in a vacuum state and then is used.

According to the invention, the polyurethane layer can be printed on the specific part of the base fabric, so that the purpose of increasing the elasticity of the specific part of the clothes can be realized; printing and elasticity increasing at specific positions are realized by manufacturing a specific silk screen printing plate, wherein the silk screen printing plate can be used for manufacturing and designing partial meshes as through holes, and the shape formed by the through holes is a pattern formed after the base fabric is printed; the positions of the through holes on the screen printing plate and the positions of the base cloth are adjusted before printing, so that the aims of printing on specific parts and increasing local elasticity can be fulfilled.

Before printing on the fabric, the flatness of the fabric needs to be ensured and the fabric can be tightly attached to a printing bedplate, and the fabric is adhered and fixed on the printing bedplate, so that the phenomenon that the printing effect is influenced by the fact that a scraper moves to shift or become uneven in the printing process is avoided;

in the printing process, the slurry is poured at one end of the screen printing plate to form a long strip, and the slurry leaking area of the screen printing plate can be covered in the blade coating process; pressing down by a scraper to apply pressure to move from the slurry at one end to the other end so that the slurry is extruded onto the fabric through the mesh, lifting up the scraper when the scraper scrapes the whole screen printing plate, lifting up the screen printing plate, and slightly scraping the slurry back to the initial position by the scraper, so that the printing process is one time; and lifting the scraper, pressing down the scraper and the screen plate for resetting, and performing the next printing stroke.

In the printing process, every time printing is finished, the printing platen needs to be moved to the drying oven for primary baking, so that the slurry layer on the fabric is subjected to primary curing and forming, the next printing can be performed, the elasticity and the restoring force are continuously increased through layer upon layer superposition, and the number of times of printing can be determined according to different elasticity requirements in the practical application process.

After the printing process is completed, the fabric is taken down from the printing bedplate and then baked, so that the excessive stretching of the printing area is avoided.

According to the preparation of the elastic fabric, functional additives such as chitin, anion mineral powder, far infrared mineral powder and the like can be added into polyurethane according to different product requirements, so that the functions of sterilizing the fabric, releasing oxygen anions and the like can be enhanced.