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Enhanced polyurethane wood-imitation material and manufacturing method thereof

A technology of imitating wood materials and manufacturing methods, which is applied in the field of wood-plastic composite materials, can solve problems such as poor bending strength, impact resistance, heat resistance, and restrictions on use occasions, and achieve enhanced heat resistance, strong molding ability, good heat resistance

Inactive Publication Date: 2012-10-17
GUANGDONG YIHUA TIMBER IND +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, compared with wood, the flexural strength, impact strength and heat resistance of polyurethane imitation wood materials are poor, and its application occasions are limited.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] First, 1 part by mass of nanocellulose, 105 parts of polyisocyanate, 92 parts of polyether polyol, 0.5 part of catalyst, 5.5 parts of foaming agent, and 2 parts of foam stabilizer are added to the mixer at high speed Stir for 5-10 seconds to form a mixture, then immediately inject the mixture into a mold coated with a release agent, keep the temperature constant for 0.5-1 hour at a temperature of 25-35°C, and then release the mold to obtain a reinforced polyurethane Imitation wood material.

[0030] The nanocellulose comes from wood processing residues, and is prepared by chemical pretreatment and a new method of sonochemical treatment combined with high-energy ultrasonic waves, so that the tensile strength, bending strength and impact strength of the reinforced polyurethane imitation wood material are greatly improved. improve.

Embodiment 2

[0032] The preparation method of this example is exactly the same as that of Example 1, only the mass ratio of each component is different. When preparing polyurethane wood-like materials, first adjust the mass ratio of each component to: 5 parts of nanocellulose, 109 parts of polyisocyanate, 91 parts of polyether polyol, 1.5 parts of catalyst, 6 parts of blowing agent, 1.5 parts of part foam stabilizer. The properties of the polyurethane imitation wood material prepared in this embodiment are also improved in terms of tensile strength, flexural strength and impact strength.

Embodiment 3

[0034] The preparation method of this example is exactly the same as that of Example 1, only the mass ratio of each component is different. When preparing polyurethane wood-like materials, first adjust the mass ratio of each component to: 10 parts of nanocellulose, 112 parts of polyisocyanate, 90 parts of polyether polyol, 2 parts of catalyst, 7.5 parts of blowing agent, 0.5 parts part foam stabilizer. The properties of the polyurethane imitation wood material prepared in this embodiment are also improved in terms of tensile strength, flexural strength and impact strength.

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Abstract

The invention relates to a manufacturing method of an enhanced polyurethane wood-imitation material. The material comprises components of nano cellulose, polyisocyanate, polyether polyol and additives. The components are mixed according to a certain proportion and synthesized into the enhanced polyurethane wood-imitation material through a one-step forming method. The invention adopts the nano cellulose prepared from wood machining residues to mix with polyisocyanate, polyether polyol and additives, and the mixture is synthesized into the enhanced polyurethane wood-imitation material through a one-step forming method; so the polyurethane wood-imitation material has high strength, good heat resistance, good molding ability and high strength-to-weight ratio, and is a novel engineering material. Compared with an existing polyurethane wood-imitation material, the polyurethane wood-imitation material of the invention has advantages of greatly enhanced mechanical properties and heat resistance, good size stability, high hardness, good aging resistance, effectively expanded application range, simple manufacturing process, easiness for application and low comprehensive cost.

Description

technical field [0001] The invention relates to the field of wood-plastic composite materials, in particular to a reinforced polyurethane imitation wood material and a manufacturing method thereof. Background technique [0002] As a new type of engineering material, polyurethane foam has been more and more used in packaging, house beams, indoor and outdoor wall carvings, columns, and imitation wood materials due to its strong molding ability, high strength-to-weight ratio, and low overall cost. And accessories, etc., especially in high-end export furniture and interior decoration projects have been used to a certain extent. However, compared with wood, the flexural strength, impact strength and heat resistance of polyurethane imitation wood materials are poor, and its application occasions are limited. Contents of the invention [0003] The object of the present invention is to address the above existing problems and deficiencies, to provide a reinforced polyurethane imit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/08C08L97/02C08G18/48
Inventor 吴燕黄琼涛吴智慧孙宏南关惠元徐伟张碧莲
Owner GUANGDONG YIHUA TIMBER IND
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