Non-woven composite fabric for fully-degradable protective clothing

Abstract

The utility model discloses a non-woven composite fabric for full-degradable protective clothing. The non-woven composite fabric comprises a degradable non-woven fabric base layer, a degradable antibacterial layer, a degradable anti-radiation layer, a degradable waterproof layer and a degradable wear-resistant layer which are compounded with one another, the degradable non-woven fabric base layer is arranged between the degradable antibacterial layer and the degradable anti-radiation layer; the degradable waterproof layer is arranged between the degradable anti-radiation layer and the degradable wear-resistant layer; and the degradable waterproof layer is a full-open type foam structure biomass film. Based on the non-woven composite fabric for the full-degradable protective clothing, the degradable antibacterial layer can effectively block bacteria and inhibit bacteria breeding; the degradable anti-radiation layer has the characteristics of being antibacterial, degradable, renewable, non-toxic, harmless, flame-retardant and the like; the degradable waterproof layer has excellent mechanical performance, surface performance and waterproof performance; the degradable wear-resistant layer has good mechanical properties and good wear resistance; each layer of the non-woven composite fabric is made of degradable materials, and can be completely degraded when being discarded.

Description

Technical Field

[0001] The utility model relates to the technical field of textile fabrics, in particular to a non-woven composite fabric for fully degradable protective clothing. Background Art

[0002] Non-woven fabrics are widely used in the fields of medical health, bill payment, packaging materials, etc. due to their light weight, breathability, non-toxicity, low price, moisture resistance and other characteristics. As a non-woven composite fabric for protective clothing, it has its own antibacterial properties and has become a hot development in recent years. In addition, the material used for current protective clothing is usually polypropylene spunbond fabric, and it is disposable, but in the natural environment, polypropylene takes about 20-30 years to degrade, and when it decomposes, it will seep into the soil, causing serious pollution to the environment and is not conducive to sustainable development. Utility Model Content

[0003] The utility model aims to provide a non-woven composite fabric for a fully degradable protective clothing, which aims to solve the problems raised in the above-mentioned background technology.

[0004] To solve the above technical problems, the purpose of the utility model is achieved as follows: a non-woven composite fabric for fully degradable protective clothing, comprising: a composite degradable non-woven fabric base layer, a degradable antibacterial layer, a degradable radiation protection layer, a degradable waterproof layer and a degradable wear-resistant layer; the degradable non-woven fabric base layer is arranged between the degradable antibacterial layer and the degradable radiation protection layer; the degradable waterproof layer is arranged between the degradable radiation protection layer and the degradable wear-resistant layer; the degradable waterproof layer is a biomass film with a fully open pore structure.

[0005] On the basis of the above scheme and as a preferred scheme of the above scheme: the degradable non-woven fabric base layer is a PLA melt-blown non-woven fabric.

[0006] On the basis of the above scheme and as a preferred scheme of the above scheme: the degradable antibacterial layer is a silver-loaded bio-based polyamide polylactic acid fiber membrane.

[0007] On the basis of the above scheme and as a preferred scheme of the above scheme: the degradable radiation protection layer is a barium alginate fiber non-woven fabric.

[0008] On the basis of the above scheme and as a preferred scheme of the above scheme: the degradable wear-resistant layer is a bio-based polyamide 56 fiber non-woven fabric.

[0009] On the basis of the above scheme and as a preferred scheme of the above scheme: the degradable non-woven fabric base layer, the degradable antibacterial layer, the degradable radiation protection layer, the degradable waterproof layer and the degradable wear-resistant layer are compounded by a mesh degradable hot-melt adhesive.

[0010] The beneficial effects of the utility model are as follows: based on the non-woven composite fabric of the fully degradable protective clothing of the utility model, the degradable antibacterial layer can effectively block bacteria and inhibit bacterial growth; the degradable radiation protection layer not only has the function of radiation protection, but also has antibacterial, degradable, renewable, non-toxic, harmless, flame retardant and other characteristics; the degradable waterproof layer is easy to degrade, renewable, widely available, and has excellent mechanical properties, surface properties and waterproof properties; the degradable wear-resistant layer has good mechanical properties, wear resistance, chemical resistance and flame retardancy; all layers of the non-woven composite fabric are degradable materials, and when discarded, they can be fully degraded, effectively alleviating environmental pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 The non-woven composite fabric for the fully degradable protective clothing involved in the utility model;

[0012] In the figure: 1-degradable non-woven fabric base layer, 2-degradable antibacterial layer, 3-degradable radiation protection layer, 4-degradable waterproof layer, 5-degradable wear-resistant layer. DETAILED DESCRIPTION

[0013] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments.

[0014] Combination Figure 1 The present embodiment is described in detail. A non-woven composite fabric for a fully degradable protective clothing comprises: a composite degradable non-woven fabric base layer 1, a degradable antibacterial layer 2, a degradable radiation protection layer 3, a degradable waterproof layer 4 and a degradable wear-resistant layer 5; the degradable non-woven fabric base layer 1 is arranged between the degradable antibacterial layer 2 and the degradable radiation protection layer 3; the degradable waterproof layer 4 is arranged between the degradable radiation protection layer 3 and the degradable wear-resistant layer 5; the degradable waterproof layer 4 is a biomass film with a fully open pore structure.

[0015] Specifically, the preparation process of the fully open cell structure biomass film is as follows: using redwood bark, 73% amylopectin and 27% conventional corn flour as raw materials, using a unilateral free foaming process and a forming mold, putting the slurry prepared from the raw materials into the foaming mold, merging the upper and lower molds to form the slurry, waiting for 10 seconds, raising the upper mold to a specific height, and forming a foaming zone on the top; when the foaming agent inside the slurry decomposes, the gas diffuses toward the foaming zone, and the pressure value of the area is controlled by a metering valve and a pressure gauge to be between 2.5-3.0MPa; and then Use a temperature sensor to control the internal temperature of the mold between 195-205°C; after waiting for 2 minutes, open the mold to obtain a new composite material; put a TPS / LCNF slurry with a mass ratio of 15% into the storage container, adjust the spray gun pressure to 5MPa, and spray at a distance of 100mm. Evenly apply the slurry on the surface of the new composite material. After applying it twice, put it in an oven at 60°C for 2 minutes, take it out, and spray it again 2 times. After repeating the above operation 5 times, you can get a smooth, fully open-cell structure biomass film. This biomass film has the advantages of easy degradation, renewable, and wide sources. Because LCNF contains lignin, it has aromatic groups in the elements. Under the influence of this group, it has the characteristics of hydrophobicity, which improves its waterproof performance. In addition, before laying the film, a large amount of gas is discharged from the inside during the bubble molding, resulting in a large number of holes on the surface of the product, and it is uneven and not smooth. After laying the film, the holes on the surface are covered, the smoothness is significantly improved, the contact angle is increased, and its waterproof performance is also significantly improved.

[0016] Furthermore, the degradable non-woven fabric base layer 1 is a PLA melt-blown non-woven fabric.

[0017] Furthermore, the degradable antibacterial layer 2 is a silver-loaded bio-based polyamide polylactic acid fiber membrane. The synthetic monomers of bio-based polyamides are derived from the enzymatic decomposition products of plants and the like in nature. The synthetic monomers are widely available, and bio-based polyamides have good biocompatibility and good biodegradability. Metallic silver is often used in biomedical products. It not only has the effects of preservation, accelerated healing and anti-infection, but also can effectively inhibit the growth of bacteria. Polylactic acid, also known as polylactide, is a non-toxic and completely biodegradable material. It is an ideal green polymer material. The surface is highly hydrophobic due to the lack of hydrophilic groups in its structure. The preparation process of the silver-loaded bio-based polyamide polylactic acid fiber membrane is as follows: under the condition of relative humidity below 50%, a 10ml disposable syringe is used to extract the standing polylactic acid spinning solution, the receiving distance is adjusted to 18cm, and the receiving roller speed is set to 300r / min; the first membrane structure is obtained by spinning at 18kV voltage for 30min, and on this basis, another needle is used to connect the bio-based polyamide / Ag +The solution was injected into the syringe and spun at 15 kV for 1 h to obtain the second layer. The operation of the first layer was repeated to obtain a complete three-layer membrane structure. The propulsion speed of the polylactic acid solution was set to 0.8 mL / h, and the bio-based polyamide / Ag + The solution advancing speed is set to 0.4 mL / h. The silver-loaded bio-based polyamide polylactic acid fiber membrane has low cost, convenient operation, and can effectively block bacteria and inhibit bacterial growth.

[0018] Furthermore, the degradable radiation-proof layer 3 is a barium alginate fiber non-woven fabric. Alginate fiber is a kind of man-made fiber, specifically refers to the raw material of the fiber for consumption made from alginate extracted from some brown algae plants in the ocean. According to different preparation methods, it can be mainly divided into calcium alginate fiber, zinc alginate fiber, copper alginate fiber, barium alginate fiber, silver alginate fiber and the like. Alginate fibers basically have the fiber properties of antibacterial, degradable, renewable, non-toxic, harmless, flame retardant, etc., among which barium alginate fiber also has the characteristics of high strength and radiation protection.

[0019] Furthermore, the degradable wear-resistant layer 5 is a non-woven fabric of bio-based polyamide 56 fibers. The raw materials and processing process of bio-based polyamide 56 fibers are green and environmentally friendly, and have good mechanical properties, hygroscopicity, softness, wear resistance, dyeability, heat resistance, chemical resistance and flame retardancy. In addition, bio-based polyamide 56 has good degradability. Due to its natural biomass characteristics, it can gradually degrade into harmless substances in the environment and eventually be absorbed and utilized by organisms.

[0020] Furthermore, the degradable non-woven fabric base layer, the degradable antibacterial layer, the degradable radiation protection layer, the degradable waterproof layer and the degradable wear-resistant layer are compounded by a mesh-shaped degradable hot-melt adhesive.

[0021] 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 non-woven composite fabric for fully degradable protective clothing, characterized in that: include: A degradable non-woven fabric base layer (1), a degradable antibacterial layer (2), a degradable radiation protection layer (3), a degradable waterproof layer (4) and a degradable wear-resistant layer (5) are composited; the degradable non-woven fabric base layer (1) is arranged between the degradable antibacterial layer (2) and the degradable radiation protection layer (3); the degradable waterproof layer (4) is arranged between the degradable radiation protection layer (3) and the degradable wear-resistant layer (5); the degradable waterproof layer (4) is a biomass film with a fully open pore structure.

2. The non-woven composite fabric for fully degradable protective clothing according to claim 1, characterized in that: The degradable non-woven fabric base layer (1) is a PLA melt-blown non-woven fabric.

3. The non-woven composite fabric for fully degradable protective clothing according to claim 1, characterized in that: The degradable antibacterial layer (2) is a silver-loaded bio-based polyamide polylactic acid fiber membrane.

4. The non-woven composite fabric for fully degradable protective clothing according to claim 1, characterized in that: The degradable radiation protection layer (3) is a barium alginate fiber non-woven fabric.

5. The non-woven composite fabric for fully degradable protective clothing according to claim 1, characterized in that: The degradable wear-resistant layer (5) is a bio-based polyamide 56 fiber non-woven fabric.

6. The non-woven composite fabric for fully degradable protective clothing according to claim 1, characterized in that: The degradable non-woven fabric base layer (1), the degradable antibacterial layer (2), the degradable radiation protection layer (3), the degradable waterproof layer (4) and the degradable wear-resistant layer (5) are compounded by means of a mesh-shaped degradable hot-melt adhesive.

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