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 prone to mold, aging and deterioration, resulting in a decline in material performance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The PP / elastomer resin chip enters the screw extruder for melt spinning, and passes through the extruder zone 1, extruder zone 2, extruder zone 3, extruder zone 4, and extruder zone 5 respectively. zone and the six zones of the extruder (the temperature of the six zones of the extruder and the temperature of the exit of the extruder are respectively set to 160°C, 165°C, 170°C, 175°C, 180°C, 185°C, 190°C), The melt is drawn under the high-speed hot air flow to form superfine short fibers, and at the same time, it is combined with the carded hollow polyester or hollow polypropylene to form a down-like fiber aggregation material, which falls on the conveying screen.

[0032] Among them, the hot air draft temperature of melt blown 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 combed into a single fiber state , the roller with a rotating sp...

Embodiment 2

[0035] The PP / elastomer resin chip enters the screw extruder for melt spinning, and passes through the extruder zone 1, extruder zone 2, extruder zone 3, extruder zone 4, and extruder zone 5 respectively. zone and the six zones of the extruder (the temperature of the six zones of the extruder and the temperature of the exit of the extruder are respectively set to 163°C, 168°C, 173°C, 178°C, 183°C, 188°C, 200°C), The melt is drawn under the high-speed hot air flow to form ultra-fine short fibers, and at the same time, it is combined with the carded spandex to form a down-like fiber aggregation material, which falls on the conveying screen.

[0036] Among them, the drawing temperature of the melt-blown hot air flow is 230°C, and the spinning speed is 800m / min; the spandex is loosened on the conveyor net curtain added near the spinneret and sent to the roller to be combed into a single fiber state, and the rotation speed is 2300r / min The roller throws the combed fiber into the me...

Embodiment 3

[0039] The PP / elastomer resin chip enters the screw extruder for melt spinning, and passes through the extruder zone 1, extruder zone 2, extruder zone 3, extruder zone 4, and extruder zone 5 respectively. zone and the six zones of the extruder (the temperature of the six zones of the extruder and the temperature of the exit of the extruder are respectively set to 163°C, 168°C, 173°C, 178°C, 183°C, 188°C, 200°C), Under the drafting of high-speed hot air flow, the melt forms superfine short fibers, and at the same time, it is combined with the carded rubber fibers to form a down-like fiber aggregate material, which falls on the net conveying curtain.

[0040] Among them, the drawing temperature of the melt-blown hot air flow is 230°C, and the spinning speed is 800m / min; the rubber fiber is loosened on the conveyor net curtain added near the spinneret and sent to the roller to be combed into a single fiber state, and the rotation speed is 2500r / The min roller throws the combed f...

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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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