Flame-retardant heat-storage acupuncture cotton

Abstract

The utility model discloses flame-retardant heat storage acupuncture cotton which comprises a first flame-retardant layer, a heat storage layer, a reinforcing layer, a heat preservation layer, a sound absorption and noise reduction layer and a second flame-retardant layer which are sequentially arranged. The first flame-retardant layer, the heat storage layer, the reinforcing layer, the heat preservation layer, the sound absorption and noise reduction layer and the second flame-retardant layer are compounded through needling; the first flame-retardant layer and the second flame-retardant layer are aramid fiber flame-retardant fiber layers; the heat storage layer is a polyethylene glycol polyacrylonitrile composite superfine fiber layer; the reinforcing layer is a polyester fiber layer, and the lapping mode of the reinforcing layer is cross lapping. Based on the flame-retardant heat-storage acupuncture cotton, the first flame-retardant layer and the second flame-retardant layer have excellent high-temperature-resistant and flame-retardant functions; the heat storage layer and the heat preservation layer can achieve good heat storage and heat preservation effects; the sound absorption and noise reduction layer can effectively convert sound waves into heat energy to be consumed; when being used as a building thermal insulation material of a residential building, the building thermal insulation material not only has thermal insulation and flame retardance, but also has sound absorption and noise reduction functions.

Description

Technical Field

[0001] The utility model relates to the technical field of needle-punched cotton, in particular to flame-retardant heat-storing needle-punched cotton. Background Art

[0002] In recent years, nonwoven technology has developed rapidly, and the applications of its products have continued to expand. Currently, there are many nonwoven materials suitable for building insulation on the market. Building insulation materials are generally divided into inorganic, organic, and metal insulation materials. Inorganic insulation materials are non-flammable but have high thermal conductivity; organic insulation materials have low thermal conductivity but are prone to fire. Therefore, building insulation materials must not only consider thermal insulation properties but also have good flame retardancy. Furthermore, with the continuous development of urbanization, noise pollution is the third largest pollution after air and water pollution. It has a harmful effect on people's nervous system and affects their normal daily life. Therefore, building insulation materials used in residential buildings must also have a certain sound absorption and noise reduction effect. Utility Model Content

[0003] The purpose of the utility model is to provide a flame retardant heat storage needle-punched cotton, which is intended to solve the problems raised in the above background technology.

[0004] In order to solve the above technical problems, the purpose of the utility model is achieved as follows: a flame retardant heat storage needle-punched cotton, comprising: a first flame retardant layer, a heat storage layer, a reinforcing layer, a thermal insulation layer, a sound absorption and noise reduction layer and a second flame retardant layer arranged in sequence; the first flame retardant layer, the heat storage layer, the reinforcing layer, the thermal insulation layer, the sound absorption and noise reduction layer and the second flame retardant layer are compounded by needle punching; the first flame retardant layer and the second flame retardant layer are aramid flame retardant fiber layers; the heat storage layer is a polyethylene glycol polyacrylonitrile composite ultrafine fiber layer; the reinforcing layer is a polyester fiber layer, and the laying method of the reinforcing layer is cross-laying.

[0005] On the basis of the above solution and as a preferred solution of the above solution: the laying method of the aramid flame retardant fiber layer is cross-laying.

[0006] On the basis of the above solution and as a preferred solution of the above solution: the thermal insulation layer is a recycled cotton fiber layer.

[0007] On the basis of the above scheme and as a preferred scheme of the above scheme: the surface density of the regenerated cotton fiber layer is 400g / ㎡, and the needle punching density is 10 needles / cm 2 .

[0008] On the basis of the above scheme and as a preferred scheme of the above scheme: the sound absorption and noise reduction layer includes PLA needle-punched non-woven fabric and PLA ultrafine porous fiber membrane, and the PLA ultrafine porous fiber membrane is arranged on the side close to the second flame retardant layer.

[0009] On the basis of the above scheme and as a preferred scheme of the above scheme: the surface density of the PLA needle-punched nonwoven fabric is 300g / ㎡, and the needle-punching density is 8 needles / cm 2 , the acupuncture depth is 5mm.

[0010] The beneficial effects of the utility model are: based on the flame-retardant heat-storage needle-punched cotton of the utility model, the first flame-retardant layer and the second flame-retardant layer have excellent high-temperature resistance and flame-retardant functions; the heat storage layer and the thermal insulation layer can achieve good heat storage and heat preservation effects; the sound-absorbing and noise-reducing layer can effectively convert sound waves into heat energy for consumption; when used as a building insulation material for residential buildings, it is not only heat-insulating and flame-retardant, but also has the functions of sound absorption and noise reduction. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic structural diagram of the flame-retardant heat-storing needle-punched cotton involved in the present utility model;

[0012] In the figure: 1-first flame retardant layer, 2-heat storage layer, 3-reinforcement layer, 4-thermal insulation layer, 5-sound absorption and noise reduction layer, 6-second flame retardant layer. DETAILED DESCRIPTION

[0013] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0014] Combine Figure 1 This embodiment is described in detail. A flame-retardant, heat-storage needle-punched cotton fabric comprises: a first flame-retardant layer 1, a heat-storage layer 2, a reinforcement layer 3, a thermal insulation layer 4, a sound-absorbing and noise-reducing layer 5, and a second flame-retardant layer 6, arranged in sequence. The first flame-retardant layer 1, heat-storage layer 2, reinforcement layer 3, thermal insulation layer 4, sound-absorbing and noise-reducing layer 5, and second flame-retardant layer 6 are compounded by needle-punching. The first flame-retardant layer 1 and the second flame-retardant layer 6 are aramid flame-retardant fiber layers. The heat-storage layer 2 is a polyethylene glycol polyacrylonitrile composite microfiber layer. The reinforcement layer 3 is a polyester fiber layer, and the reinforcement layer 3 is cross-lapped. Cross-lapping can increase the overall strength and tear resistance of the nonwoven material.

[0015] Polyethylene glycol, a phase change material with temperature regulation, heat storage and energy storage, can undergo a phase change from amorphous to crystalline at room temperature and obtain phase change enthalpy, accompanied by the absorption, storage and release of latent heat. It is a common phase change material. Polyacrylonitrile is an important industrial polymer raw material. Its molecular chain contains a large number of strongly polar cyano groups, which has strong chemical reactivity and can form strong hydrogen bonds with organic matter. It is an active site for polyacrylonitrile polymer modification and functionalization. Specifically, the polyethylene glycol: polyacrylonitrile blending ratio in the polyethylene glycol polyacrylonitrile composite ultrafine fiber is 80:20. The polyethylene glycol and polyacrylonitrile molecular chains can be combined through hydrogen bonding. The two have good blending and spinning compatibility. The prepared composite ultrafine fiber has good size and shape stability, thermal properties, and good heat storage and energy storage properties.

[0016] Furthermore, the aramid flame-retardant fiber layer is cross-laid. Aramid flame-retardant fiber, also known as aramid 1313, is characterized by excellent heat resistance and high strength. Its performance can remain stable for a long time at 250°C. Its needle-punched products can be used as high-temperature resistant and flame-retardant materials, exhibiting superior heat resistance, flame retardancy, non-toxicity, and good mechanical properties.

[0017] Furthermore, the thermal insulation layer 4 is a recycled cotton fiber layer. Furthermore, the surface density of the recycled cotton fiber layer is 400g / ㎡, and the needle punching density is 10 needles / cm 2 Regenerated cotton fiber is low-cost, lightweight, and has good thermal insulation properties. The regenerated cotton fiber is opened and cleaned in a carding machine, then cross-laid into a web. A needle loom is then used to reinforce the web. To a certain extent, the thicker the web, the better the thermal insulation effect. Therefore, only one needling step is required.

[0018] Furthermore, the sound absorption and noise reduction layer 5 includes a PLA needle-punched nonwoven fabric and a PLA ultra-fine porous fiber membrane, and the PLA ultra-fine porous fiber membrane is arranged on the side close to the second flame retardant layer 6. Furthermore, the surface density of the PLA needle-punched nonwoven fabric is 300g / ㎡, and the needle punching density is 8 punctures / cm 2 , the acupuncture depth is 5mm.

[0019] Using sound-absorbing materials to dissipate the acoustic energy during noise transmission is an effective way to mitigate the harmful effects of noise pollution on human health. PLA (polyethylene glycol) is a biodegradable material with excellent performance and a wide range of applications. PLA ultrafine porous fibers produced using electrospinning technology possess high porosity and a porous interconnected structure, showing great potential for application in sound absorption and noise reduction.

[0020] The PLA needle-punched nonwoven fabric is made by needle-punching PLA after three rounds of opening, combing, and web laying, effectively absorbing sound waves by converting them into heat. The fabric is then fixed to a roller and electrospinning is used to form a layer of PLA ultra-fine porous fiber membrane. Specifically, the PLA ultra-fine porous fiber membrane is prepared by mixing a PLA spinning solution containing 12% PLA by mass with chloroform and N,N-dimethylformamide in a mass ratio of 8:2. After stirring for 12 hours, the membrane is electrospun. Due to its unique porous structure, the nanopores on individual fibers and the pores between the fibers of the nonwoven material form a three-dimensional porous sound-absorbing structure. Sound waves repeatedly collide and rub against each other within these pores, effectively enhancing the composite material's sound absorption performance.

[0021] Specifically, the PLA ultrafine porous fiber membrane is positioned near the second flame-retardant layer 6. This means that when the porous fibers are placed facing the sound, the sound absorption effect is superior to that of PLA needle-punched nonwoven fabric. This is because the high specific surface area and high porosity provided by the porous fibers' unique fiber structure make it easier for sound waves to enter and propagate within the material. When sound waves reach the material, some are reflected, while the remaining sound waves penetrate the gaps and micropores between the fibers within the material, as well as the pores within the PLA ultrafine porous fibers. This causes the air within the material to move. Due to the viscous resistance of the air and the friction between the air, the fibers, and the pore walls, some of the sound energy is converted into heat and consumed, resulting in significant sound absorption performance.

[0022] The above describes in detail the preferred embodiments of the present invention. It should be understood that those skilled in the art can make numerous modifications and variations based on the concepts of the present invention without inventive effort. Therefore, any technical solutions that can be derived by those skilled in the art based on the concepts of the present invention through logical analysis, reasoning, or limited experimentation based on the existing technology should be within the scope of protection defined by the claims.

Claims

1. A flame retardant heat storage needle-punched cotton, characterized in that: include: A first flame retardant layer (1), a heat storage layer (2), a reinforcing layer (3), a thermal insulation layer (4), a sound absorption and noise reduction layer (5) and a second flame retardant layer (6) are sequentially arranged; the first flame retardant layer (1), the heat storage layer (2), the reinforcing layer (3), the thermal insulation layer (4), the sound absorption and noise reduction layer (5) and the second flame retardant layer (6) are compounded by needle punching; the first flame retardant layer (1) and the second flame retardant layer (6) are aramid flame retardant fiber layers; the heat storage layer (2) is a polyethylene glycol polyacrylonitrile composite ultrafine fiber layer; the reinforcing layer (3) is a polyester fiber layer, and the reinforcing layer (3) is laid in a cross-laying manner.

2. The flame retardant heat storage needle-punched cotton according to claim 1, characterized in that: The aramid flame retardant fiber layer is laid in a cross-laying manner.

3. The flame retardant heat storage needle-punched cotton according to claim 1, characterized in that: The thermal insulation layer (4) is a recycled cotton fiber layer.

4. The flame retardant heat storage needle-punched cotton according to claim 3, characterized in that: The surface density of the regenerated cotton fiber layer is 400g / ㎡, and the needle punching density is 10 punctures / cm 2 .

5. The flame retardant heat storage needle-punched cotton according to claim 1, characterized in that: The sound absorption and noise reduction layer (5) comprises a PLA needle-punched nonwoven fabric and a PLA ultra-fine porous fiber membrane, and the PLA ultra-fine porous fiber membrane is arranged on a side close to the second flame-retardant layer (6).

6. The flame retardant heat storage needle-punched cotton according to claim 5, characterized in that: The surface density of the PLA needle-punched nonwoven fabric is 300 g / ㎡, and the needle-punching density is 8 thorns / cm 2 The acupuncture depth is 5 mm.

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