An environmentally friendly, high-efficiency flame-retardant nonwoven fabric

Abstract

This invention discloses an environmentally friendly, high-efficiency flame-retardant nonwoven fabric, applied in the field of nonwoven fabric technology. This invention enhances its functionality by combining an inner layer with an outer layer and a middle layer. The middle layer facilitates the positioning of the filler cylinder, and the flame-retardant filler effectively improves the flame-retardant effect of the composite material. During processing, the inner, outer, and middle layers are combined, causing the filler cylinder to be compressed and deformed, resulting in a relatively thinner nonwoven fabric material while extending the filler cylinder and the internal flame-retardant material to increase the surface area. The outer strength layer and the coordinating layer use environmentally friendly materials to improve the structure's wear resistance, and the elastic layer, in conjunction with the flame-retardant layer, provides an initial flame-retardant effect. The elastic layer improves the structure's ductility and allows it to recover its shape when stretched. The inner antistatic layer reduces the probability of static electricity generation to prevent static electricity from igniting nearby flammable materials.

Description

Technical Field

[0001] This invention belongs to the field of nonwoven fabric technology, and specifically relates to an environmentally friendly, high-efficiency flame-retardant nonwoven fabric. Background Technology

[0002] Non-woven fabric, also known as non-woven cloth, needle-punched cotton, needle-punched non-woven fabric, etc., has the characteristics of moisture-proof, breathable, flexible, lightweight, flame-retardant, non-toxic and odorless, inexpensive and recyclable. It can be used in various industries, such as sound insulation, heat insulation, electric heating elements, masks, clothing, medical, filling materials, etc. Non-woven fabric is made from chemical fibers and plant fibers on wet or dry papermaking machines under the condition of water or air as the suspension medium.

[0003] While existing non-woven fabrics have a wide range of applications, in some building or industrial settings, flame-retardant properties are sometimes required, and their functionality is relatively limited. Although simply combining non-woven fabrics together does not provide additional benefits, they are also difficult to extinguish when a fire breaks out.

[0004] Based on the above-mentioned issues, we found that existing nonwoven fabric technologies struggle to simultaneously address these problems. Therefore, we propose an environmentally friendly, high-efficiency flame-retardant nonwoven fabric that significantly improves flame-retardant efficiency, offers superior functionality, and reduces the difficulty of firefighting by personnel. Summary of the Invention

[0005] The purpose of this invention is to address the existing environmentally friendly, high-efficiency flame-retardant nonwoven fabric, which has the advantages of significantly improving flame-retardant efficiency, strong functionality, and reducing the difficulty of fire extinguishing by personnel.

[0006] The above-mentioned technical objective of the present invention is achieved through the following technical solution: an environmentally friendly, high-efficiency flame-retardant nonwoven fabric, comprising an inner layer, an outer layer disposed on the outer side of the inner layer, an outer layer disposed on the outer side of the outer layer, a filler cylinder disposed on the inner side of the outer layer, flame-retardant filler being filled on the inner side of the filler cylinder, and the outer layer being corrugated and enclosing the filler cylinder therein;

[0007] The outer layer includes a strength layer, a mating layer is disposed inside the strength layer, an elastic layer is disposed inside the mating layer, and a flame-retardant layer is disposed inside the elastic layer.

[0008] The inner layer includes an antistatic layer, a breathable layer is provided on the inner side of the antistatic layer, and a tear-resistant layer is provided on the inner side of the breathable layer.

[0009] By adopting the above technical solution, the functionality is enhanced by setting an inner layer to work in conjunction with an outer layer and a middle layer. The middle layer facilitates the positioning of the packing cylinder, and the flame-retardant filler effectively improves the flame-retardant effect of the composite material. During processing, the packing cylinder is compressed and deformed when the inner, outer, and middle layers are combined, so that the entire non-woven fabric material is relatively thinned, while the packing cylinder and the internal flame-retardant material are extended to increase the area. The outer strength layer and the mating layer use environmentally friendly materials to improve the wear resistance of the structure, and the elastic layer, in conjunction with the flame-retardant layer, provides a preliminary flame-retardant effect. The elastic layer can improve the ductility of the structure and has the possibility of restoring itself when it is stretched and deformed. The inner antistatic layer can reduce the probability of static electricity generation to prevent static electricity from igniting nearby flammable materials, and the tear-resistant layer can improve the tear resistance of the structure.

[0010] The present invention is further configured such that: the flame retardant layer is made of polyvinyl chloride, the compounding layer is made of polylactic acid, the strength layer is made of polyamide, and the elastic layer is made of polypropylene.

[0011] By adopting the above technical solution, the flame-retardant layer made of polyvinyl chloride has certain flame-retardant properties, the compounding layer made of polylactic acid can be more environmentally friendly while reducing costs, the strength layer made of polyamide has good anti-friction effect, and the elastic layer made of polypropylene has good ductility and elasticity.

[0012] The present invention is further configured such that the strength layer, the mating layer, the elastic layer and the flame retardant layer are formed by melt-blowing, and the outer layer is formed by hot pressing using a porous mold to form a porous structure.

[0013] By adopting the above technical solution, melt-blown processing can facilitate the rapid and convenient processing and composite of the strength layer, the bonding layer, the elastic layer and the flame retardant layer one by one. By using a porous mold to form a porous structure in the outer layer, the air permeability and water repellency of the structure can be improved.

[0014] The present invention is further configured such that: the intermediate layer is made of pure cotton material, and the filler tube is made of recycled polyester fiber material.

[0015] By adopting the above technical solution, the cotton interlayer made of recycled polyester fiber material has good water absorption effect and can also improve insulation efficiency. In the event of a fire, it is easy to spray fire extinguishing water onto the surface of the structure and wet the cotton interlayer to improve fire extinguishing efficiency, while preventing the material from spontaneously combusting.

[0016] The present invention is further configured such that: the intermediate layer is made of cotton fiber material bonded together with fibers, and the flame retardant filler is made of cellulose phosphate hydrochloride material.

[0017] By adopting the above technical solution, the intermediate layer made of fiber bonding can facilitate the processing of cotton materials, and the flame retardant material made of cellulose phosphate hydrochloride can play a good flame retardant role.

[0018] The present invention is further configured such that: the antistatic layer is made of polypropylene material, the breathable layer is made of polyester fiber material, and the tear-resistant layer is made of nylon fiber material.

[0019] Using the above technical solution, the antistatic layer made of polypropylene material has a good antistatic effect, the breathable layer made of polyester fiber material can facilitate the structure to breathe and can be quickly dried after being wetted inside, and the tear-resistant layer made of nylon fiber material has sufficient strength and at the same time prevents it from being damaged when tearing.

[0020] The present invention is further configured such that: a pressing layer is provided on the outer side of the outer layer and the inner side of the inner layer, and the pressing layer is made of spandex material.

[0021] By adopting the above technical solution, the pressing layer can be set to facilitate pressing with the internal structure. The pressing layer made of spandex material has good ductility and elasticity on the outside, which prevents it from cracking during hot pressing and causing the internal structure to bulge out.

[0022] The present invention is further configured such that: a pressing layer is provided on both the rear and front sides of the inner layer, and the inner side of the pressing layer is provided on the outer side of the outer layer.

[0023] By adopting the above technical solution, the use of a pressing layer in conjunction with a bonding layer can facilitate a stable connection between the inner and outer layers, preventing tearing at the seams.

[0024] The present invention is further configured such that: optionally, aluminum silicate material particles are added during the processing of the edge pressing layer and the pressing layer, and phenolic resin is sprayed onto the surface of the edge pressing layer and the pressing layer after processing.

[0025] By adopting the above technical solution, the flame retardant effect can be enhanced by adding aluminum silicate material particles during processing and spraying phenolic resin after forming.

[0026] The present invention is further configured as follows: during processing, the bottom pressing layer, inner layer, middle layer, outer layer and top pressing layer are stacked in sequence, and hot melt film is superimposed on each layer. The pressing layer is then folded on the outside of the inner layer and the outer layer. The hot pressing is carried out until the hot melt film melts and is formed after cooling. When the middle layer is superimposed, it is folded into a wave shape and a filler tube filled with flame retardant filler is inserted.

[0027] By adopting the above technical solution, the hot pressing action of setting up superimposed hot melt film can facilitate the composite of multiple surface layers. At the same time as pressing, the edge layer will be pressed into the inside of the pressed layer to prevent loosening, and the filler cylinder will also be flattened to make its contact surface larger.

[0028] In summary, the present invention has the following beneficial effects:

[0029] The functionality is enhanced by combining an inner layer with an outer layer and a middle layer. The middle layer facilitates the positioning of the packing cylinder, while the flame-retardant filler effectively improves the flame-retardant effect of the composite material. During processing, the packing cylinder is compressed and deformed when the inner, outer, and middle layers are combined, making the entire non-woven fabric material relatively thinner and allowing the packing cylinder and the internal flame-retardant material to extend and increase the area. The outer strength layer and the mating layer use environmentally friendly materials to improve the wear resistance of the structure, and the elastic layer, in conjunction with the flame-retardant layer, provides an initial flame-retardant effect. The elastic layer improves the ductility of the structure and allows it to recover its shape when stretched. The inner antistatic layer reduces the probability of static electricity generation to prevent static electricity from igniting nearby flammable materials, and the tear-resistant layer improves the tear resistance of the structure. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0031] Figure 2 This is a schematic diagram of the inner and outer internal structures of the present invention;

[0032] Figure 3 This is a schematic diagram of the internal structure of the main body of the present invention;

[0033] Figure 4 This is a schematic diagram of the outer layer structure of the present invention;

[0034] Figure 5 This is a schematic diagram of the inner layer structure of the present invention;

[0035] Figure 6 This is a schematic diagram showing the location of the intermediate layer structure of the present invention;

[0036] Figure 7 This is a schematic diagram of the hot-pressed structure of the intermediate layer of the present invention;

[0037] Figure 8 This is a schematic diagram of the hot pressing of the main structure of the present invention.

[0038] Reference numerals: 1. Inner layer; 101. Antistatic layer; 102. Breathable layer; 103. Tear-resistant layer; 2. Intermediate layer; 3. Outer layer; 301. Strength layer; 302. Fitting layer; 303. Elastic layer; 304. Flame-retardant layer; 4. Packing cylinder; 5. Flame-retardant packing; 6. Pressed layer; 7. Edge pressing layer. Detailed Implementation

[0039] The present invention will be further described in detail below with reference to the accompanying drawings.

[0040] Example 1:

[0041] refer to Figure 1-8 An environmentally friendly, high-efficiency flame-retardant nonwoven fabric includes an inner layer 1, an intermediate layer 2 on the outside of the inner layer 1, an outer layer 3 on the outside of the intermediate layer 2, a filler cylinder 4 on the inside of the intermediate layer 2, and flame-retardant filler 5 filled inside the filler cylinder 4. The intermediate layer 2 is corrugated and wraps the filler cylinder 4 inside.

[0042] The outer layer 3 includes a strength layer 301, a mating layer 302 is provided inside the strength layer 301, an elastic layer 303 is provided inside the mating layer 302, and a flame-retardant layer 304 is provided inside the elastic layer 303.

[0043] The inner layer 1 includes an antistatic layer 101, a breathable layer 102 is provided on the inner side of the antistatic layer 101, and a tear-resistant layer 103 is provided on the inner side of the breathable layer 102.

[0044] The inner layer 1 is combined with the outer layer 3 and the middle layer 2 to enhance its functionality. The middle layer 2 facilitates the positioning of the packing cylinder 4. The flame-retardant filler 5 effectively improves the flame-retardant effect of the composite material. During processing, the inner layer 1, outer layer 3 and middle layer 2 are combined to compress and deform the packing cylinder 4, making the entire non-woven fabric material relatively thinner and allowing the packing cylinder 4 and the internal flame-retardant material to extend and increase the area. The strength layer 301 and the mating layer 302 of the outer layer 3 use environmentally friendly materials to improve the wear resistance of the structure. The elastic layer 303, together with the flame-retardant layer 304, provides a preliminary flame-retardant effect. The elastic layer 303 can improve the ductility of the structure and has the possibility of restoring itself when it is stretched and deformed. The antistatic layer 101 of the inner layer 1 can reduce the probability of static electricity generation to prevent static electricity from igniting nearby flammable materials. The tear-resistant layer 103 can improve the tear resistance of the structure.

[0045] like Figure 4 As shown, the flame-retardant layer 304 is made of polyvinyl chloride, the compound layer 302 is made of polylactic acid, the strength layer 301 is made of polyamide, and the elastic layer 303 is made of polypropylene. By setting the flame-retardant layer 304 made of polyvinyl chloride, it has certain flame-retardant properties. The compound layer 302 made of polylactic acid can be more environmentally friendly while reducing costs. The strength layer 301 made of polyamide has good anti-friction effect. The elastic layer 303 made of polypropylene has good ductility and elasticity.

[0046] like Figure 4As shown, the strength layer 301, the mating layer 302, the elastic layer 303, and the flame-retardant layer 304 are formed by melt-blowing, and the outer layer 3 is formed into a porous structure by using a porous mold through hot pressing. Melt-blowing can facilitate the rapid and convenient processing and composite of the strength layer 301, the mating layer 302, the elastic layer 303, and the flame-retardant layer 304 one layer at a time. Using a porous mold to form a porous structure in the outer layer 3 can improve the air permeability and water repellency of the structure.

[0047] like Figure 6 As shown, the intermediate layer 2 is made of pure cotton material, and the filler cylinder 4 is made of recycled polyester fiber material. By setting the pure cotton intermediate layer 2 made of recycled polyester fiber material, it has a good water absorption effect and can also improve the insulation efficiency. In the event of a fire, it is easy to spray fire extinguishing water onto the surface of the structure and wet the pure cotton intermediate layer 2 to improve the fire extinguishing efficiency and at the same time prevent the material from spontaneously combusting.

[0048] like Figure 6 As shown, the intermediate layer 2 is made of cotton fiber material through fiber bonding, and the flame retardant filler 5 is made of cellulose phosphate hydrochloride material. The intermediate layer 2, which is made of fiber bonding, facilitates the processing of cotton material, and the flame retardant material made of cellulose phosphate hydrochloride material can play a good flame retardant role.

[0049] like Figure 5 As shown, the antistatic layer 101 is made of polypropylene, the breathable layer 102 is made of polyester fiber, and the tear-resistant layer 103 is made of nylon fiber. The antistatic layer 101 made of polypropylene has a good antistatic effect, the breathable layer 102 made of polyester fiber can facilitate the structure to breathe and can be quickly dried after being wetted inside, and the tear-resistant layer 103 made of nylon fiber has sufficient strength and at the same time prevents it from being damaged when tearing.

[0050] like Figure 3 As shown, a pressing layer 6 is provided on the outer side of the outer layer 3 and the inner side of the inner layer 1. The pressing layer 6 is made of spandex material. By setting the pressing layer 6, it is easy to press it together with the internal structure. The pressing layer 6 made of spandex material has good extensibility and elasticity on the outside, which prevents it from cracking during hot pressing and causing the internal structure to bulge out.

[0051] like Figure 8 As shown, the inner layer 1 has a pressing layer 7 on both the back and front sides. The inner side of the pressing layer 7 is located on the outer side of the outer layer 3. By setting the pressing layer 7 in conjunction with the pressing layer 6, it is easy to make a stable connection between the inner layer 1 and the outer layer 3, and avoid tearing at the seam.

[0052] like Figure 8As shown, aluminum silicate material particles can be optionally added to the edge pressing layer 7 and the pressing layer 6 during processing, and phenolic resin can be sprayed onto the surface of the edge pressing layer 7 and the pressing layer 6 after processing. By adding aluminum silicate material particles during processing and spraying phenolic resin after forming, its flame retardant effect can be enhanced.

[0053] like Figure 8 As shown, during processing, the bottom lamination layer 6, inner layer 1, middle layer 2, outer layer 3 and top lamination layer 6 are stacked in sequence, and hot melt films are superimposed on each. Then, the edge layer 7 is folded on the outside of the inner layer 1 and the outer layer 3. The hot pressing is carried out until the hot melt film melts and is shaped after cooling. When the middle layer 2 is stacked, it is folded into a wave shape, and the filler tube 4 filled with flame retardant filler 5 is inserted. By setting the superimposed hot melt film for hot pressing, it is easy to composite multiple surface layers. During the pressing, the edge layer 7 is pressed on the inside of the lamination layer 6 to prevent loosening, and the filler tube 4 is also flattened to make its contact surface larger.

[0054] Brief description of the usage process: First, stack the bottom pressing layer 6, inner layer 1, middle layer 2, outer layer 3 and top pressing layer 6 in sequence, and then stack hot melt films on each. Then, fold the edge pressing layer 7 on the outside of the inner layer 1 and outer layer 3. Hot press until the hot melt film melts and takes shape after cooling. When stacking the middle layer 2, fold it into a wave shape and insert the packing cylinder 4 filled with flame retardant filler 5. By setting the stacked hot melt film for hot pressing, it is easy to composite multiple surface layers to complete the processing of the structure. When in use, the strength layer 301 and the mating layer 302 of the outer layer 3 use environmentally friendly materials to improve the wear resistance of the structure. The elastic layer 303 and the flame retardant layer 304 provide a preliminary flame retardant effect. The elastic layer 303 can improve the ductility of the structure and make it possible to return to its original position when deformed. The antistatic layer 101 of the inner layer 1 can reduce the probability of static electricity generation to avoid static electricity igniting flammable materials in the vicinity. The tear-resistant layer 103 can improve the tear resistance of the structure.

[0055] This specific embodiment is merely an explanation of the present invention and is not intended to limit the invention. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. An environmentally friendly, high-efficiency flame-retardant nonwoven fabric, comprising an inner layer (1), characterized in that: The inner layer (1) is provided with an intermediate layer (2) on the outside, the intermediate layer (2) is provided with an outer layer (3) on the outside, the intermediate layer (2) is provided with a packing cylinder (4) on the inside, the packing cylinder (4) is filled with flame-retardant filler (5) on the inside, the intermediate layer (2) is wavy and wraps the packing cylinder (4) inside; The outer layer (3) includes a strength layer (301), a mating layer (302) is provided on the inner side of the strength layer (301), an elastic layer (303) is provided on the inner side of the mating layer (302), and a flame-retardant layer (304) is provided on the inner side of the elastic layer (303). The inner layer (1) includes an antistatic layer (101), a breathable layer (102) is provided on the inner side of the antistatic layer (101), a tear-resistant layer (103) is provided on the inner side of the breathable layer (102), the flame-retardant layer (304) is made of polyvinyl chloride, the mating layer (302) is made of polylactic acid, the strength layer (301) is made of polyamide, and the elastic layer (303) is made of polypropylene. The strength layer (301), mating layer (302), elastic layer (303) and flame-retardant layer (304) are formed by melt-blowing, and the outer layer (3) is formed by hot-pressing using a porous mold to form a porous structure. The filler cylinder (4) is made of recycled polyester fiber. The middle layer (2) is made of cotton fiber through fiber bonding. The flame-retardant filler (5) is made of cellulose phosphate hydrochloride. The antistatic layer (101) is made of polypropylene. The breathable layer (102) is made of polyvinyl chloride. The outer layer (3) is made of polyester fiber material, the tear-resistant layer (103) is made of nylon fiber material, and a pressing layer (6) is provided on the outer side of the outer layer (3) and the inner side of the inner layer (1). The pressing layer (6) is made of spandex material. A pressing layer (7) is provided on the rear and front sides of the inner layer (1). The inner side of the pressing layer (7) is provided on the outer side of the outer layer (3). After processing, phenolic resin is sprayed on the surface of the pressing layer (7) and the pressing layer (6). The environmentally friendly, high-efficiency flame-retardant nonwoven fabric is processed by stacking the bottom pressing layer (6), inner layer (1), middle layer (2), outer layer (3) and top pressing layer (6) in sequence, and then stacking hot melt film on each layer. The pressing layer (7) is then folded on the outside of the inner layer (1) and the outer layer (3). The hot pressing is carried out until the hot melt film melts and is formed after cooling. When stacking the middle layer (2), the middle layer (2) is folded into a wave shape and the filler cylinder (4) is wrapped inside the middle layer (2).

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