Production technology of sound absorbing cotton formed by compounding short fiber and melt-blowing

A composite molding and production process technology, applied in the field of non-woven fabrics, can solve the problems of sound absorption, sound insulation effect, low resilience and bulkiness, poor fiber compression resistance, etc., and achieve perfect compression resilience and air permeability Good, good sound insulation performance

Inactive Publication Date: 2018-11-16
芜湖跃飞新型吸音材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, my country's annual demand for non-woven automotive sound-absorbing fiber materials reaches 8 million m 2 Left and right, the main raw materials used in this product are various fibers, and then processed by adding hot-melt fibers. The source of raw materials is relatively abundant and the price is low. However, this material has general sound absorption and sound insulation effects, and is mostly used in middle and low-end cars.
Later, people began to study various flame-retardant, sound-absorbing, sound-insulating and high-temperature-resistant materials, but this kind of fiber has poor compression resistance, low resilience and bulkiness, and it is difficult to absorb sound for a long time. Methods and processes are improved on the existing technology, combined with the characteristics of automotive interior materials, to explore sound-absorbing and sound-insulating methods and processes suitable for automotive interior materials, such as compounding non-woven fabrics with certain metal materials or special materials, and adding resonant functional groups , the special finishing of interior materials will greatly improve the sound-absorbing and sound-insulating performance of the material

Method used

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  • Production technology of sound absorbing cotton formed by compounding short fiber and melt-blowing
  • Production technology of sound absorbing cotton formed by compounding short fiber and melt-blowing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 1. Take three-dimensional crimped polyester hollow staple fibers and flame-retardant polyester staple fibers, with a diameter of 25 μm and a length of 60 mm, and first comb them into a single fiber state.

[0030] 2. Put the combed short fiber into the feeding roller of the opening device, the feeding speed is 5.8m / min, the width of the feeding opening is 1m, and it is opened twice through rough opening and fine opening.

[0031] 3. It is fed into the hot air flow of the melt-blown process through the nozzle pipe to form a uniformly dispersed mixed fiber flow, which is gathered in the middle of the double rollers under the action of stretching air, and the upper and lower surfaces are bonded to non-woven fabrics to produce melt-blown Composite material, in which the non-woven fabric is processed from polypropylene with a thickness of 0.15mm and an areal density of 15g / m 2 .

[0032] 4. Take PP polymer slices with a melt index of 150g / min and pass through a screw extrud...

Embodiment 2

[0037] 1. Take three-dimensional crimped polyester hollow staple fibers and flame-retardant polyester staple fibers, with a diameter of 25 μm and a length of 60 mm, and first comb them into a single fiber state.

[0038] 2. Put the combed short fiber into the feeding roller of the opening device, the feeding speed is 6.0m / min, the width of the feeding opening is 1.2m, and it is opened twice through rough opening and fine opening.

[0039] 3. It is fed into the hot air flow of the melt-blown process through the nozzle pipe to form a uniformly dispersed mixed fiber flow, which is gathered in the middle of the double rollers under the action of stretching air, and the upper and lower surfaces are bonded to non-woven fabrics to produce melt-blown Composite material, in which the non-woven fabric is processed from polypropylene with a thickness of 0.15mm and an areal density of 15g / m 2

[0040] 4. Take PP polymer slices with a melt index of 165g / min and pass through a screw extrud...

Embodiment 3

[0045] 1. Take three-dimensional crimped polyester hollow staple fibers and flame-retardant polyester staple fibers, with a diameter of 25 μm and a length of 60 mm, and first comb them into a single fiber state.

[0046] 2. Put the combed short fiber into the feeding roller of the opening device, the feeding speed is 6.2m / min, the width of the feeding opening is 1.2m, and the fiber is opened twice through rough opening and fine opening.

[0047] 3. It is fed into the hot air flow of the melt-blown process through the nozzle pipe to form a uniformly dispersed mixed fiber flow, which is gathered in the middle of the double drum under the action of stretching air, and the upper and lower surfaces are bonded to non-woven fabrics to obtain melt-blown Composite material, in which the non-woven fabric is processed from polypropylene with a thickness of 0.15mm and an areal density of 15g / m 2 .

[0048] 4. Take PP polymer slices with a melt index of 180g / min and pass through a screw e...

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Abstract

The invention discloses a production technology of sound absorbing cotton formed by compounding short fiber and melt-blowing. Compared with a traditional technology, two-time opening technology, an airflow wind supplement conveying mechanism, double-roller receiving composite forming technology are mainly added. The production technology of the sound absorbing cotton formed by compounding the short fiber and melt-blowing has the advantages that equipment is advanced, the technology is simple, it is noticed that the temperature is controlled on the original basis, the prepared sound absorbing cotton not only has excellent properties of light weight, sound absorption, good sound insulation performance, good hydrophobicity, good plasticity, flame retardance and the like, but also is odorless,waterproof, dampproof, good in air permeability, anti-staining and antibacterial, and has a wide application prospect and market value.

Description

technical field [0001] The invention belongs to the technical field of nonwoven fabrics, and in particular relates to a production process of sound-absorbing cotton compounded with short fibers and melt blown. Background technique [0002] Nowadays, with the rapid development of the automobile industry, the production scale and production technology of automobile interior materials have been greatly improved. In the field of automotive noise-reducing filling materials, non-woven materials are used more and more widely, and are used as various automotive interior parts, such as seats, cladding materials for body baffles, roof base fabrics and roof linings, Car carpets, trunk linings, etc. At present, it takes an average of 20m to produce a car 2 The equivalent weight of non-woven materials is about 15-20kg, of which non-woven porous noise-reducing materials account for about 18%, and the amount is still increasing. [0003] With the continuous development of the economy an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D04H5/00D01D5/08D01D5/14
CPCD04H5/00D01D5/08D01D5/14
Inventor 章云王敏雪王黎明杨祥林尚元利于华兵
Owner 芜湖跃飞新型吸音材料股份有限公司
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