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Sound insulation composite material of bamboo fibrofelt and polypropylene and preparing method thereof

A composite material and bamboo fiber technology, applied in the direction of chemical instruments and methods, sound-emitting devices, synthetic resin layered products, etc., to achieve good sound insulation, good processability, and small shrinkage and distortion

Active Publication Date: 2010-07-07
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the use of bamboo fiber in sound insulation materials has not been reported. Therefore, the research on bamboo fiber reinforced composite sound insulation materials has broad application prospects.

Method used

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  • Sound insulation composite material of bamboo fibrofelt and polypropylene and preparing method thereof
  • Sound insulation composite material of bamboo fibrofelt and polypropylene and preparing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The average length of bamboo fiber is 15mm, the average fineness is 500μm, and the surface density is 1.5kg / m 2 Bamboo fiber felt, put it in an oven at 110°C to dry for 20 minutes, take it out and cool to room temperature; then press the bamboo fiber felt every 0.1m 2 Coat 15g of tributyl citrate, evenly coat tributyl citrate on the surface of the bamboo fiber felt, and then spread it on a flat vulcanizer for 30 minutes at normal temperature and pressure at 2MPa, and then take it out under normal pressure. Place it down for 30min to obtain the bamboo fiber felt mixture.

[0022] The average molecular weight is 300,000 and the specific gravity is 0.8g / cm 3 The isotactic polypropylene powder, tributyl citrate and epoxidized soybean oil were uniformly mixed in proportions of 43.2%, 54.3% and 2.5% by weight respectively to obtain a polypropylene mixture.

[0023] The polypropylene mixture is evenly coated on the surface of the bamboo fiber felt mixture, wherein the bamboo...

Embodiment 2

[0038] The average length of bamboo fiber is 27mm, the average fineness is 400μm, and the surface density is 2.7kg / m 2Bamboo fiber felt, put it in an oven at 120°C to dry for 15 minutes, take it out and cool to room temperature; then press the bamboo fiber felt every 0.1m 2 Coat 18g of triethyl citrate, evenly coat triethyl citrate on the surface of the bamboo fiber felt, and then spread it on a flat vulcanizer for 20 minutes at normal temperature and pressure at 3MPa, and then take it out under normal pressure. Place it down for 45min to obtain the bamboo fiber felt mixture.

[0039] The average molecular weight is 400,000 and the specific gravity is 1.0g / cm 3 The isotactic polypropylene powder, tributyl citrate and epoxidized soybean oil were uniformly mixed in proportions of 31%, 65% and 4% by weight respectively to obtain a polypropylene mixture.

[0040] The polypropylene mixture is evenly coated on the surface of the bamboo fiber felt mixture, wherein the bamboo fiber ...

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Abstract

The present invention relates to a sound insulation composite material of bamboo fibrofelt and polypropylene and a preparing method thereof. The material is prepared from 50 to 70% by weight of bamboo fibrofelt mixture and 30 to 50% by weight of polypropylene mixture. The hot press forming technique of the material comprises the following steps: bamboo fibrofelt is first processed by tricaprylyl citrate with a proper technique, and the bamboo fibrofelt processed is immersed by polypropylene mixture prepared and molded by hot pressing. The sound insulation composite material of bamboo fibrofelt and polypropylene has the advantages of good sound and heat insulation properties, relatively small material shrinkage and torsion, high size stability and good processability. The properties of the material obviously reach the properties of the existing sound insulation composite material of fiber reinforced resin. The material can be broadly used in the industry of automobiles, buildings, ships, home decoration, industrial packaging, etc for replacing early sound insulation materials, such as glass fiber composite materials. The preparing method of the sound insulation composite material of bamboo fibrofelt and polypropylene is simple in techniques and can be realized by conventional equipment.

Description

technical field [0001] The invention relates to the field of sound-insulating composite material and its hot-pressing forming process, in particular to a green and environment-friendly bamboo fiber felt / polypropylene sound-insulating composite material and its hot-pressing forming process. Background technique [0002] With the continuous enhancement of "ecological awareness", people pay more and more attention to environmental protection and health. Among them, the environmental pollution caused by plastics with excellent processing performance and used in various industrial products has become a common concern. In particular, fiber-reinforced composite materials are usually composed of glass fibers, carbon fibers, etc. and plastics, which are difficult to dispose of, and the production environment is harsh, which adds a great burden to the environment. Therefore, natural fibers such as bamboo, hemp, and wood fibers have attracted people's interest in development and applic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10K11/162B32B27/12B32B27/22B32B27/32
Inventor 朱春燕范欣愉顾群傅雅琴颜春江艳华邓智涛
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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