Plant fibre reinforced foam composite material with hard polyurethane structure and production thereof

A technology of rigid polyurethane and composite materials, which is applied in the field of materials, can solve the problems that products are not widely used, and achieve the effects of reducing product costs, broad application prospects, and reducing production costs

Inactive Publication Date: 2005-12-28
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, some foreign countries have entered the stage of industrialization, and our country is still in the research stage in general, and the products have not been widely used.

Method used

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  • Plant fibre reinforced foam composite material with hard polyurethane structure and production thereof
  • Plant fibre reinforced foam composite material with hard polyurethane structure and production thereof

Examples

Experimental program
Comparison scheme
Effect test

specific example 1

[0047] Concrete example 1: the first step, weigh according to following proportioning, in the raw material mixed liquor after raw material preparation, add the jute chopped fiber that is not through surface treatment, and wherein fiber length is respectively 3mm, 5mm, 10mm.

[0048] 100 parts of polyether polyol resin (hydroxyl value 400-600 mgKOH / g), 115 parts of polyphenyl polymethyl polyisocyanate, 0.6 part of triethanolamine, 0.1 part of dibutyltin dilaurate, 3 parts of dimethyl siloxane Parts, 5 parts of fluorotrichloromethane (HCFC-141b) and 3 parts of jute fiber (untreated).

[0049] In the second step, the reinforced rigid polyurethane structural foam composite material is made by using the aforementioned one-step molding process.

specific example 2

[0050] Concrete example 2: in concrete embodiment 1, in the raw material mixed solution after raw material preparation, add the jute chopped fiber through surface treatment, wherein fiber length is respectively 3mm, 5mm, 10mm. Other implementation process conditions and process are identical with example 1.

specific example 3

[0051] Concrete example 3: the first step, weigh according to following proportioning, add the jute chopped fiber through surface treatment in the raw material mixture after raw material preparation, wherein fiber length is respectively 3mm.

[0052] 100 parts of polyether polyol resin (hydroxyl value 400-600 mgKOH / g), 115 parts of polyphenyl polymethyl polyisocyanate, 0.6 part of triethanolamine, 0.1 part of dibutyltin dilaurate, 3 parts of dimethyl siloxane 1 part, 5 parts of fluorotrichloromethane (HCFC-141b), 10 parts of ceramic hollow microspheres and 1 part of jute fiber (treated)

[0053] In the second step, the reinforced rigid polyurethane structural foam composite material is made by using the aforementioned one-step molding process.

[0054] Density and performance of above-mentioned embodiment gained product are as shown in table 1:

[0055] Specific example 1

Specific example 2

Specific example 3

fiber length

(mm)

3

5...

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Abstract

Vegetable reinforced fibre foam composite material with hard polyurethane structure and its production are disclosed. The composite material consists of organic polyol resin 100 proportion, organic polyisocyanate 105í½160 proportion, catalyst 0.4í½0.8 proportion, promoter 0.1í½0.2 proportion, foam stabilizer 1í½3 proportion, foamer 5í½15 proportion and vegetable fibre 1í½5 proportion. The composite material is prepared by surface treating for raw linen etc. vegetable fibre, which comprises alkali process and acid wash, and mould pressure forming from one-step process, which comprises raw material preparing, adding chopped strand, pouring mould pressure forming and mould unloading. It achieves simple process, low cost and biological degradation.

Description

technical field [0001] The invention relates to the field of materials, in particular to a plant fiber reinforced rigid polyurethane structural foam composite material and a preparation process thereof. Background technique [0002] In recent years, due to the characteristics of light weight, low price, easy availability, biodegradability, and no pollution to the environment, high-performance plant fibers are very suitable as resin-based fibers due to their high crystallinity, orientation, and longitudinal elastic modulus. The reinforcement phase of composite materials, so the research and development of its composite materials has increasingly attracted people's attention. The research and development of hemp fiber composite materials and their products were carried out earlier in foreign countries. Since the 1960s, jute and its fabrics have been used abroad to reinforce thermoplastic and thermosetting resins. As the origin and main origin of jute, India has always been a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/72
Inventor 梅启林黄志雄王福玲杜明秦岩彭永利
Owner WUHAN UNIV OF TECH
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