Formaldehyde-removing composite non-woven fabric

Abstract

The utility model discloses a formaldehyde-removing composite non-woven fabric, which belongs to the technical field of composite non-woven fabrics and comprises a first non-woven fabric layer, a reinforced gridding cloth layer and a second non-woven fabric layer which are compounded with one another, the side, away from the added gridding cloth layer, of the first non-woven fabric layer is coated with a formaldehyde absorption coating. The formaldehyde absorbing coating is formed by amino-terminated branched amide-amine molecules; and the second non-woven fabric layer is a diatomite fiber non-woven fabric. According to the formaldehyde-removing composite non-woven fabric, amino-terminated branched amide-amine molecules capable of absorbing formaldehyde are adopted and can react with formaldehyde. And the arranged reinforced gridding cloth layer can enhance the strength of the composite non-woven fabric.

Description

Technical Field

[0001] This utility model relates to a formaldehyde-removing composite nonwoven fabric, belonging to the technical field of composite nonwoven fabrics. Background Technology

[0002] Spunlace nonwoven fabric is a type of nonwoven fabric with a certain strength and thickness, formed by intertwining the fibers of one or more layers of fiber web using a hydroentangling reinforcement process. The hydroentangling reinforcement process involves using a high-pressure water jet, passing through a spray plate in the hydroentangling head, to continuously spray a fine jet of high-pressure water onto the fiber web moving on a support curtain or rotating drum. Under the dual action of the direct impact force of the water jets or the reflected force of the water flow, the fibers in the fiber web shift, interweave, and become entangled, forming numerous mechanical bonds, thus reinforcing the fiber web. The raw materials for hydroentangle nonwoven fabric are widely available, including polyester, nylon, polypropylene, viscose fiber, chitosan fiber, microfiber, Tencel, silk, bamboo fiber, wood pulp fiber, and seaweed fiber, among others.

[0003] In modern architectural interior decoration, wallpaper is increasingly becoming a favorite wall covering material due to its convenience, aesthetics, style, and sophisticated look. Since wallpaper is applied along the wall surface, its large area means that if it could absorb formaldehyde, it would be highly effective. Therefore, the question of how to prepare a formaldehyde-removing composite non-woven fabric has become a key issue to be addressed. Utility Model Content

[0004] The purpose of this invention is to provide a formaldehyde-removing composite nonwoven fabric that has the effect of adsorbing formaldehyde.

[0005] To solve the above-mentioned technical problems, the purpose of this utility model is achieved as follows:

[0006] The present invention relates to a formaldehyde-removing composite nonwoven fabric, comprising a first nonwoven fabric layer, a reinforcing mesh fabric layer, and a second nonwoven fabric layer.

[0007] The side of the first nonwoven fabric layer away from the mesh fabric layer is coated with a formaldehyde-absorbing coating; the formaldehyde-absorbing coating is a terminal amino-branched amide molecule.

[0008] The second nonwoven layer is diatomaceous earth fiber nonwoven fabric.

[0009] Based on the above scheme and as a preferred embodiment of the above scheme: the first nonwoven layer is flame-retardant spunbond PP nonwoven fabric.

[0010] Based on the above scheme and as a preferred embodiment of the above scheme: the reinforcing mesh fabric layer is woven from polyester filament or nylon filament and has a square mesh with a side length of 3-5cm.

[0011] Based on the above scheme and as a preferred embodiment of the above scheme: a sound-absorbing layer is composited between the reinforcing mesh layer and the second non-woven fabric layer 3.

[0012] Based on the above scheme and as a preferred embodiment of the above scheme: the sound-absorbing layer is polyester fiber sound-absorbing cotton or porous sound-absorbing flame-retardant bamboo fiber aerogel.

[0013] The beneficial effects of this invention are as follows: The formaldehyde-removing composite nonwoven fabric involved in this invention uses terminal amino-branched amide-amine molecules that can absorb formaldehyde and react with it. Furthermore, the reinforced mesh layer increases the strength of the composite nonwoven fabric. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the formaldehyde-removing composite nonwoven fabric involved in Example 1;

[0015] Figure 2 This is a schematic diagram of the formaldehyde-removing composite nonwoven fabric involved in Example 2.

[0016] The markings in the diagram are explained as follows: 1-First nonwoven fabric layer; 2-Reinforcing mesh fabric layer; 3-Second nonwoven fabric layer; 4-Formaldehyde-absorbing coating; 5-Sound-absorbing layer. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0018] Example 1

[0019] Combination Figure 1 This embodiment provides a detailed description. The formaldehyde-removing composite nonwoven fabric involved in this embodiment includes a first nonwoven layer 1, a reinforcing mesh layer 2, and a second nonwoven layer 3, specifically bonded together via a hot-melt adhesive web film. The side of the first nonwoven layer 1 away from the reinforcing mesh layer 2 is coated with a formaldehyde-absorbing coating 4; the formaldehyde-absorbing coating 4 is a terminal amino-branched amide-amine molecule; the second nonwoven layer 3 is a diatomaceous earth fiber nonwoven fabric with a basis weight of 45 grams per square meter. Specifically, the diatomaceous earth fiber is formed by adding diatomaceous earth nanocapsules to a spinning solution, mixing them evenly to form a spinning solution, and then spinning using a wet-dry method. The specific spinning solution is a viscose spinning solution. The diatomaceous earth fiber possesses functions such as dehumidification, deodorization, and formaldehyde removal.

[0020] Furthermore, the structural formula of the terminal amino-branched amine molecule is as follows:

[0021]

[0022] The specific reaction process is as follows:

[0023]

[0024] The terminal amino group in the branched amide-amine molecule can react with formaldehyde, and because the branched amide-amine molecule has a hyperbranched structure, it can react with multiple formaldehyde molecules, which can increase the reaction rate with formaldehyde, thereby achieving the effect of adsorbing formaldehyde. The thickness of the formaldehyde adsorption coating is 3-5 micrometers, and in this embodiment it is 5 micrometers.

[0025] Furthermore, the first nonwoven layer 1 is a flame-retardant spunbond PP nonwoven fabric. Flame-retardant spunbond PP nonwoven fabric is lightweight, low-cost, and flame-retardant. Specifically, its basis weight is 20 grams per square meter, and it has micropores with a pore size of 50-100 micrometers.

[0026] Furthermore, the reinforcing mesh layer 2 is woven from polyester or nylon filaments, having a square mesh with a side length of 3-5 cm and a weight of 5 grams per square meter. The reinforcing flame-retardant mesh layer 2 is woven from filaments, while in this embodiment, the nonwoven fabric is made from short fibers through carding and hydroentangling reinforcement. Nonwoven fabrics prepared from short fibers have the problem of low strength, while mesh fabrics woven from filaments can provide greater strength.

[0027] Example 2

[0028] Combination Figure 2 This embodiment will be described in detail below. The formaldehyde-removing composite nonwoven fabric involved in this embodiment differs from that in Embodiment 1 in that: a sound-absorbing layer 5 is composited between the reinforcing mesh layer 2 and the second nonwoven fabric layer 3, with a basis weight of 60 grams per square meter.

[0029] Furthermore, the sound-absorbing layer 5 is either polyester fiber sound-absorbing cotton or porous sound-absorbing flame-retardant bamboo fiber aerogel. In this embodiment, porous sound-absorbing flame-retardant bamboo fiber aerogel is selected, which has a porous structure and provides sound insulation.

[0030] The preferred embodiments of this utility model have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of this utility model without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of this utility model through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A formaldehyde removal composite nonwoven fabric, characterized by comprising: a formaldehyde removal layer; and a nonwoven fabric layer. It includes a first nonwoven fabric layer (1), a reinforcing mesh fabric layer (2), and a second nonwoven fabric layer (3) that are composite. The first nonwoven fabric layer (1) is coated with a formaldehyde-absorbing coating (4) on the side away from the mesh fabric layer (2); the formaldehyde-absorbing coating (4) is a terminal amino branched amide-amine molecule; The second nonwoven layer (3) is a diatomaceous earth fiber nonwoven fabric.

2. The formaldehyde removal composite nonwoven fabric according to claim 1, characterized in that, The first nonwoven layer (1) is a flame-retardant spunbond PP nonwoven fabric.

3. The formaldehyde removal composite nonwoven fabric according to claim 1, characterized in that, The reinforcing mesh layer (2) is woven from polyester filament or nylon filament and has a square mesh with a side length of 3-5cm.

4. The formaldehyde removal composite nonwoven fabric according to claim 1, characterized in that, A sound-absorbing layer (5) is composited between the reinforcing mesh layer (2) and the second non-woven fabric layer (3).

5. The formaldehyde removal composite nonwoven fabric according to claim 4, characterized in that, The sound-absorbing layer (5) is polyester fiber sound-absorbing cotton or porous sound-absorbing flame-retardant bamboo fiber aerogel.

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