Method for preparing sound absorption and heat insulation material and product thereof

A thermal insulation material and fiber technology, applied in the direction of melt spinning, textile and paper making, final product manufacturing, etc., can solve the problems of high melting point of PBT and inability to meet high temperature melt blown spinning

Active Publication Date: 2011-03-30
TIANJIN TEDA FILTERS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But at present, there is no domestic technology related to melt-blown PBT nonwoven products, mainly because of the high melting po...

Method used

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  • Method for preparing sound absorption and heat insulation material and product thereof
  • Method for preparing sound absorption and heat insulation material and product thereof
  • Method for preparing sound absorption and heat insulation material and product thereof

Examples

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Effect test

preparation example Construction

[0022] The preparation process of the sound-absorbing and heat-insulating material designed by the present invention (participated in figure 2 ), is a mixed fiber web material made of PET carded fiber and PBT melt-blown superfine fiber. The material is fluffy, has high porosity, small specific flow resistance, large air permeability, and more energy absorbed by sound waves; and due to the existence of PBT melt-blown ultra-fine fibers, the surface area of ​​fibers increases, and the chance of contact between sound waves and fibers Increase, the consumption of sound energy increases; at the same time, PBT fiber also has good heat resistance. The material is bonded and formed by waste heat of PBT melt-blown fibers, which maintains the original characteristics of PET and PBT fibers without using any adhesive, which simplifies the process and is conducive to environmental protection. This preparation method also increases the designability and industrial feasibility of the materi...

Embodiment 1

[0026] A PET / PBT two-component sound-absorbing and heat-insulating material with a mass ratio of 35:65 was prepared.

[0027] (1).Preparation of PET carding fiber flow: the PET fiber is metered and fed into the air carding machine by a known method, and after the PET fiber is air carded, an orderly PET carding fiber flow is formed; the average fineness of the PET fiber is 7dtex, and the average fiber length 40mm;

[0028] (2).Preparation of PBT ultra-fine melt-blown fiber flow: Feed PBT raw materials into the screw extruder and melt at 290°C. The extruded melt is transported to the metering pump through the pre-filter, and passed through the metering pump After metering, it is transported to the spinneret die, and hot air at 310°C is added to both sides of the spinneret hole to stretch the PBT fibers to form a melt-blown PBT fiber flow;

[0029](3). Prepare two-component sound-absorbing and heat-insulating materials: adjust the delivery rate of PET fiber flow (or adjust the m...

Embodiment 2

[0032] A 40:60 PET / PBT two-component sound-absorbing and heat-insulating material was prepared.

[0033] (1). Preparation of PET carding fiber flow: PET fiber is metered and fed into air carding machine with known method, PET fiber forms orderly PET carding fiber flow after air carding; the average denier of PET fiber is 10dtex, and fiber average length is 75mm;

[0034] (2).Preparation of PBT ultra-fine melt-blown fiber flow: Feed PBT raw materials into the screw extruder and melt at 310°C. The extruded melt is transported to the metering pump through the pre-filter, and passed through the metering pump After metering, it is transported to the spinneret die, and hot air at 320°C is added to both sides of the spinneret hole to stretch the PBT fibers to form a flow of melt-blown PBT fibers;

[0035] (3). Preparation of two-component sound-absorbing and heat-insulating materials: adjust the delivery rate of PET fiber flow (or adjust the melt-blown PBT metering pump), so that th...

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Abstract

The invention discloses a method for preparing a sound absorption and heat insulation material and a product thereof. The method adopts the following process: firstly, combing PET (polyester) fibers into an ordered PET fiber flow, wherein the titre of the PET fiber is 1.1-28dtex, and the fiber length is 30-100mm; secondly, slicing, fusing and spinning PBT (Polybutylece Terephthalate) to form a PBT superfine melt-blown fiber flow, wherein the fusion temperature of PBT is 290-320 DEG C, the temperature of high speed hot air flow is 280-330 DEG C, the titre of PBT superfine melt-blown fiber is 0.5-5 mu m, and the averagetitre is 2-3mum; and thirdly, mixing the PET fiber flow with the PBT superfine melt-blown fiber flow, then condensing to form a net on a net formation curtain, and adhering the fibers with each other for reinforcing and forming by using waste heat of the PBT superfine melt-blown fibers to form the sound absorption and heat insulation material, wherein the mixed mass ratio of the PET combing fiber flow to the PBT superfine melt-blown fiber flow is 35:65-85:15.

Description

technical field [0001] The invention relates to functional material technology, in particular to a preparation method of a sound-absorbing and heat-insulating material and its products. The sound-absorbing and heat-insulating material is composed of PET / PBT two-component. Background technique [0002] In recent years, with the development of modern industry and transportation, the problem of noise pollution has become increasingly prominent. It has been listed as the three major contemporary pollution sources along with air pollution and water pollution. It can not only seriously harm people's auditory system, but also make people feel tired, Deafness will also accelerate the aging of buildings and mechanical structures, affecting the accuracy and service life of equipment and instruments. With the development of society and the enhancement of human environmental awareness, people have higher and higher requirements for acoustic quality, and reducing the harm of noise has b...

Claims

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Application Information

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IPC IPC(8): D04H5/06D01D5/084D01D5/098
CPCY02P70/62
Inventor 张伟力邢克琪陈华泽杨文娟蒋艾兵
Owner TIANJIN TEDA FILTERS
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