Low-shrinkage non-woven fabric

Abstract

The utility model discloses a low-shrinkage non-woven fabric which comprises a first waterproof, oil-proof and flame-retardant non-woven fabric layer, a flame-retardant viscose fiber layer, a PTFE (Polytetrafluoroethylene) fiber layer and a second waterproof, oil-proof and flame-retardant non-woven fabric layer which are compounded with one another. According to the low-shrinkage non-woven fabric disclosed by the utility model, the waterproof and oil-proof non-woven fabric has waterproof, oil-proof and antifouling three-proofing functions. Due to the PTFE fiber layer, the size of the non-woven fabric can be kept stable when the non-woven fabric is heated.

Description

Technical Field

[0001] The utility model relates to a low-shrinkage non-woven fabric, belonging to the technical field of non-woven fabrics. Background Art

[0002] With the continuous improvement of living standards, the sales of automobiles have increased significantly, and the corresponding supporting products are also increasing. Automobile engines generate high heat during operation. The heat circulates around the engine cylinder through the water in the water tank, and the heat is taken away by the airflow generated by the rotation of the water tank fan. The lubricating oil in the engine body also plays a role in heat dissipation. It circulates in the body and not only lubricates the friction surface and cleans debris, but also takes away the heat, which is completed through the oil radiator. The engine hood is located above the engine. Long-term baking by the engine heat can easily cause the paint layer on the upper layer of the hood to be damaged by the temperature difference. At present, the market uses thermal insulation cotton to deal with the damage to the paint surface of the automobile hood caused by the high temperature of the engine. Other locations that require heat insulation also require heat insulation fabrics. However, the existing heat insulation cotton will shrink when heated for a long time. How to prepare a non-woven fabric with low shrinkage, suitable for the hood or other locations that require heat insulation, has become a problem to be solved. Utility Model Content

[0003] The utility model aims to provide a low-shrinkage nonwoven fabric, which uses PTFE fibers to prevent shrinkage and deformation when heated.

[0004] In order to solve the above technical problems, the purpose of the utility model is achieved as follows:

[0005] The utility model relates to a low-shrinkage nonwoven fabric, which comprises a composite first waterproof, oil-proof and flame-retardant nonwoven fabric layer, a flame-retardant viscose fiber layer, a PTFE fiber layer and a second waterproof, oil-proof and flame-retardant nonwoven fabric layer.

[0006] On the basis of the above scheme and as a preferred scheme of the above scheme: the first waterproof, oil-proof and flame-retardant non-woven fabric layer and the second waterproof, oil-proof and flame-retardant non-woven fabric layer are flame-retardant polyester fiber layers, and the surface of the flame-retardant polyester fiber has a three-proof finishing agent.

[0007] On the basis of the above scheme and as a preferred scheme of the above scheme: the flame-retardant polyester fiber layer includes a parallel-laid fiber layer and a cross-laid fiber layer.

[0008] On the basis of the above scheme and as a preferred scheme of the above scheme: a meta-aramid aerogel fiber layer is arranged between the flame-retardant viscose fiber layer and the PTFE fiber layer.

[0009] On the basis of the above solution and as a preferred solution of the above solution: a glass fiber layer is arranged between the PTFE fiber layer 3 and the meta-aramid aerogel fiber layer.

[0010] The utility model has the beneficial effects that the low shrinkage nonwoven fabric of the utility model has the three-proof functions of waterproof, oil-proof and anti-fouling. The PTFE fiber layer used can make the nonwoven fabric maintain stable size when heated. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 is a schematic structural diagram of the low shrinkage nonwoven fabric involved in Example 1;

[0012] Figure 2 It is a schematic structural diagram of the low shrinkage nonwoven fabric involved in the second embodiment.

[0013] The markings in the figure are as follows: 1-first waterproof, oil-proof and flame-retardant non-woven fabric layer; 2-flame-retardant viscose fiber layer; 3-PTFE fiber layer; 4-second waterproof, oil-proof and flame-retardant non-woven fabric layer; 5-unit aramid aerogel fiber layer; 6-glass fiber layer. DETAILED DESCRIPTION

[0014] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments.

[0015] Embodiment 1

[0016] Combination Figure 1 The present embodiment is described in detail. The low shrinkage nonwoven fabric involved in the present embodiment comprises a first waterproof, oil-proof and flame-retardant nonwoven fabric layer 1, a flame-retardant viscose fiber layer 2, a PTFE fiber layer 3 and a second waterproof, oil-proof and flame-retardant nonwoven fabric layer 4 which are composited.

[0017] The PTFE fibers used in the PTFE fiber layer 3 have heat resistance, good dimensional stability when heated, and are not easily deformed, so that the low-shrinkage non-woven fabric can maintain stable dimensions when heated.

[0018] Furthermore, the first waterproof, oil-proof and flame-retardant non-woven fabric layer 1 and the second waterproof, oil-proof and flame-retardant non-woven fabric layer 4 are flame-retardant polyester fiber layers, and the surface of the flame-retardant polyester fiber has a three-proof finishing agent. The flame-retardant polyester fiber used refers to polyester fiber that has been flame-retardantly modified, which has excellent flame-retardant properties and only melts but does not burn when exposed to fire. The manufacturing method mainly adopts copolymerization modification, such as using tetrabromobisphenol A hydroxyethyl ether or phosphorus-containing compounds as comonomers, and preparing copolymers through ester exchange and polycondensation with dimethyl terephthalate and ethylene glycol, and then melt spinning and stretching. Or adopt blended flame-retardant modification, add phosphorus-containing flame retardants to the spinning melt, and then melt spinning and stretching. The three-proof finishing agent used makes the first waterproof, oil-proof and flame-retardant non-woven fabric layer 1 and the second waterproof, oil-proof and flame-retardant non-woven fabric layer 4 have good waterproof, oil-proof and anti-fouling effects.

[0019] Furthermore, the flame retardant polyester fiber layer includes a parallel-laid fiber layer and a cross-laid fiber layer, and one side of the parallel-laid layer is close to the inside, while one side of the cross-laid layer faces the outside.

[0020] Specifically, the low-shrinkage non-woven fabric involved in this embodiment is a flame-retardant polyester fiber mesh, a flame-retardant viscose fiber mesh, a PTFE fiber mesh and a flame-retardant polyester fiber mesh, which are overlapped and compounded by needle punching to form a first waterproof, oil-proof and flame-retardant non-woven fabric layer 1, a flame-retardant viscose fiber layer 2, a PTFE fiber layer 3 and a second waterproof, oil-proof and flame-retardant non-woven fabric layer 4.

[0021] Embodiment 2

[0022] Combination Figure 2 , this embodiment is described in detail. The low shrinkage nonwoven fabric involved in this embodiment is different from that in the first embodiment in that a meta-aramid aerogel fiber layer 5 is provided between the flame-retardant viscose fiber layer 2 and the PTFE fiber layer 3. The meta-aramid aerogel fiber used in the meta-aramid aerogel fiber layer 5 has a good thermal insulation effect.

[0023] Furthermore, a glass fiber layer 6 is provided between the PTFE fiber layer 3 and the meta-aramid aerogel fiber layer 5. The glass fiber used in the glass fiber layer 6 is an inorganic fiber, which is not easily deformed when heated and has good dimensional stability.

[0024] The meta-aramid aerogel fiber layer 5 and the glass fiber layer 6 are also compounded with other fiber layers by needle punching.

[0025] The preferred specific embodiments of the utility model are described in detail above. It should be understood that ordinary technicians in this field can make many modifications and changes based on the concept of the utility model without creative work. Therefore, all technical solutions that can be obtained by technicians in this technical field based on the concept of the utility model through logical analysis, reasoning or limited experiments on the basis of the existing technology should be within the scope of protection determined by the claims.

Claims

1. A low shrinkage nonwoven fabric, characterized in that: It comprises a composite first waterproof, oil-proof and flame-retardant non-woven fabric layer (1), a flame-retardant viscose fiber layer (2), a PTFE fiber layer (3) and a second waterproof, oil-proof and flame-retardant non-woven fabric layer (4); A meta-aramid aerogel fiber layer (5) is provided between the flame-retardant viscose fiber layer (2) and the PTFE fiber layer (3); A glass fiber layer (6) is provided between the PTFE fiber layer (3) and the meta-aramid aerogel fiber layer (5).

2. The low shrinkage nonwoven fabric according to claim 1, characterized in that: The first waterproof, oil-proof and flame-retardant non-woven fabric layer (1) and the second waterproof, oil-proof and flame-retardant non-woven fabric layer (4) are flame-retardant polyester fiber layers, and the surfaces of the flame-retardant polyester fibers have a three-proof finishing agent.

3. A low shrinkage nonwoven fabric according to claim 2, characterized in that: The flame retardant polyester fiber layer comprises a parallel-laid fiber layer and a cross-laid fiber layer.

Images