Down-like sound insulation material and preparation method thereof

A sound insulation material, imitation down technology, applied in the field of non-woven materials, can solve the problems of material performance degradation, easy to mold, aging, deterioration, etc., to achieve the effect of overcoming easy deterioration, good damping sound insulation and rebound effect

Inactive Publication Date: 2018-01-12
NANTONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Down-type sound insulation materials are light and soft, but they are pron

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0030] Example 1

[0031] The PP / elastomer resin chips enter the screw extruder for melt spinning, and then go through the extruder zone one, extruder zone two, extruder zone three, extruder zone four, and extruder zone five. Melting in the six zones of the extruder and the extruder (the temperature of the six zones of the extruder and the temperature of the extruder outlet are set to 160℃, 165℃, 170℃, 175℃, 180℃, 185℃, 190℃), The melt forms ultra-fine short fibers under the drafting of the high-speed hot air flow. At the same time, it is combined with the carded hollow polyester or hollow polypropylene to form a feather-like fiber aggregation material, which falls on the conveyor curtain.

[0032] Among them, the hot air drafting temperature of meltblown is 200℃, and the spinning speed is 600m / min; the hollow polyester or hollow polypropylene is opened on the conveyor net curtain added near the spinneret and sent to the roller to be carded into a single fiber state , The roller w...

Example Embodiment

[0034] Example 2

[0035] The PP / elastomer resin chips enter the screw extruder for melt spinning, and then go through the extruder zone one, extruder zone two, extruder zone three, extruder zone four, and extruder zone five. Melting in the six zones of the extruder and the extruder (the temperature of the six zones of the extruder and the temperature of the extruder outlet are set to 163℃, 168℃, 173℃, 178℃, 183℃, 188℃, 200℃ respectively), The melt forms ultra-fine short fibers under the drafting of high-speed hot air flow, and at the same time, it is combined with carded spandex to form a feather-like fiber aggregate material, which falls on the conveyor curtain.

[0036] Among them, the melt-blown hot air drafting temperature is 230℃, and the spinning speed is 800m / min; the spandex is opened on the conveyor screen added near the spinneret and sent to the roller to be carded into a single fiber state, and the speed is 2300r / min The roller throws the carded fiber into the mesh cur...

Example Embodiment

[0038] Example 3

[0039] The PP / elastomer resin chips enter the screw extruder for melt spinning, and then go through the extruder zone one, extruder zone two, extruder zone three, extruder zone four, and extruder zone five. Melting in the six zones of the extruder and the extruder (the temperature of the six zones of the extruder and the temperature of the extruder outlet are set to 163℃, 168℃, 173℃, 178℃, 183℃, 188℃, 200℃ respectively), The melt forms ultra-fine short fibers under the drafting of the high-speed hot air flow. At the same time, it combines with the carded rubber fibers to form a feather-like fiber aggregate material, which falls on the conveyor curtain.

[0040] Among them, the melt-blown hot air drafting temperature is 230℃, and the spinning speed is 800m / min. The rubber fiber is opened on the conveyor screen added near the spinneret and sent to the roller to be carded into a single fiber state, and the speed is 2500r / The min roller throws the carded fibers int...

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Abstract

The invention discloses a down-like sound insulation material and a preparation method thereof. The down-like sound insulation material is prepared by compounding one or more of hollow polyester, hollow polypropylene, spandex, rubber fibers and PTT (polytrimethylene terephthalate) fibers and PP (polypropylene)/elastomer melt-blown superfine short fibers and then compounding upper and lower thin films. The down-like sound insulation material has a surface density of 50 to 500g/m<2>, a thickness of 5 to 50mm and a high-frequency sound absorption coefficient of more than 0.56. A lightweight, thinand efficient velvet-like sound insulation material is developed by improving existing melt-flowing equipment, and can be widely applied to lining materials of automobiles, acoustic screens, buildings and the like.

Description

technical field [0001] The invention belongs to the field of nonwoven materials, and relates to a down imitation sound insulation material and a preparation method thereof. Composite sound insulation material with down-like structure, light weight, thin and efficient sound insulation, can be widely used in automobiles, sound insulation screens, buildings and other lining materials. Background technique [0002] In modern society, noise pollution seriously affects people's daily life. Noise above 40dB will affect the endocrine system during sleep; above 45dB will affect the sleep of normal people; above 50dB will affect the understanding of speech in classrooms and conference rooms; above 60dB will cause obvious obstacles to speech; above 70dB will affect the Phone calls create obstacles. In noisy environments, people's attention is reduced and their responses are sluggish. Noise acts on the human central nervous system for a long time, causing the cerebral cortex to be ex...

Claims

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Application Information

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IPC IPC(8): B32B5/26B32B5/08B32B37/10B32B33/00D04H1/4382D01D1/06
Inventor 张伟魏发云邹学书张瑜李素英
Owner NANTONG UNIVERSITY
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