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A kind of modified straw/polyethylene composite material and preparation method thereof

A composite material and polyethylene technology, which is applied in the field of modified straw/polyethylene composite materials and preparation, can solve the problems of poor mechanical strength and formability, difference in the interface between wood and plastic, rough product surface, etc., and achieves good anti-aging performance. , long service life and strong wear resistance

Inactive Publication Date: 2011-12-14
常熟市慧丰塑料制品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Since the surface of resources such as bamboo, grass, and crop straw has a hydroxyl structure, it is a polar hydrophilic substance, while plastic is a non-hydrophilic substance, and the affinity between the two is poor. If the two are simply blended, the surface of the product will Rough, poor mechanical properties, even using maleic anhydride grafted material as a solubilizer, but the effect has been poor, the key is the difference in the interface between wood and plastic
At present, there are existing technologies that use polyethylene and straw materials as raw materials to manufacture composite materials through traditional hot-pressing processes, such as a lightweight bagasse composite board made of bagasse disclosed in Chinese patent CN87214339. Dry processed bagasse is hot-pressed as the core of the composite board, and the composite board made of this bagasse core has poor mechanical strength and formability

Method used

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  • A kind of modified straw/polyethylene composite material and preparation method thereof
  • A kind of modified straw/polyethylene composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 60 parts of modified straw, 25 parts of high-density polyethylene, 3.5 parts of isocyanate in acetone, 1 part of copolymer of maleic anhydride, acrylic acid and styrene, 2.5 parts of simethicone.

[0030] The preparation method is as follows: use ordinary rice straw to remove grass leaves and residual rice grains, smash them with a hay cutter, dry them, adjust the moisture content to about 5%, soak them in 2% sodium hydroxide, leave them at room temperature for 24 hours, and rinse them with distilled water , dried at 105°C for 8-10 hours, fully dried, and the moisture after drying was less than 1%, and the modified rice straw was obtained; 60 parts of modified rice straw, 25 parts of high-density polyethylene, 3.5 parts of acetone solution of isocyanate, maleic anhydride, acrylic acid , 1 part of styrene copolymer, 2.5 parts of dimethyl silicone oil. Add it into a mixer with a stirring speed of 400-500r / min, stir evenly, and extrude to granulate; the granulated particle...

Embodiment 2

[0032] 65 parts of modified straw, 27 parts of polyethylene, 4 parts of acetone solution of isocyanate, 1.5 parts of copolymer of maleic anhydride, acrylic acid and styrene, and 3 parts of paraffin wax.

[0033] The preparation method is as follows: use ordinary rice straw to remove grass leaves and residual rice grains, smash it with a hay cutter, dry it, adjust the moisture content to about 5%, soak it in 3% sodium hydroxide, leave it at room temperature for 24 hours, and rinse it with distilled water , dried at 105°C for 9 hours, fully dried, and the moisture after drying was less than 1%, and the modified rice straw was obtained; 65 parts of modified rice straw, 27 parts of polyethylene, 4 parts of acetone solution of isocyanate, maleic anhydride, acrylic acid, and styrene 1.5 parts of copolymer, 3 parts of paraffin. Add it into a mixer with a stirring speed of 400-500r / min and stir evenly, extrude and granulate; pre-press the granulated particles in a pre-pressing machine...

Embodiment 3

[0035] 70 parts of modified straw, 30 parts of polyethylene, 4 parts of acetone solution of isocyanate, 2 parts of copolymer of maleic anhydride, acrylic acid and styrene, 4 parts of polyester wax.

[0036] The preparation method is as follows: use ordinary rice straw to remove grass blades and residual rice grains, smash them with a hay cutter, dry them, adjust the moisture content to about 5%, soak them in 5% sodium hydroxide, leave them at room temperature for 24 hours, and rinse them with distilled water , dried at 105°C for 10 hours, fully dried, and after drying, the moisture content was less than 1%, and the modified rice straw was obtained; 70 parts of modified rice straw, 30 parts of polyethylene, 4 parts of acetone solution of isocyanate, maleic anhydride, acrylic acid, and styrene 2 parts of copolymer, 4 parts of polyester wax. Add it into a mixer with a stirring speed of 400-500r / min and stir evenly, extrude and granulate; pre-press the granulated particles in a pr...

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Abstract

The invention relates to a modified rice straw / polyethylene composite material. The components and their mass-to-number ratios are: 60-70 parts of modified rice straw, 25-30 parts of polyethylene, 3.5-5 parts of adhesive, and 1 part of solubilizer. ~ 2 parts, lubricant 2.5 ~ 4 parts. The preparation method is to firstly modify the common rice straw; then add the modified rice straw and other components according to the ratio of parts by weight to a mixer with a stirring speed of 400-500r / min, stir evenly, extrude and granulate; The particles are pre-pressed in a pre-pressing machine, then put into a hot-pressing machine for hot-pressing, cooling, and cutting; finally, the finished product is finished by surface roughening and shaping. The product obtained by the invention is easy to process, does not contain formaldehyde, has strong wood feeling, high surface hardness, strong wear resistance and environmental protection, and has the performance of being similar to wood but superior to wood.

Description

technical field [0001] The invention relates to a composite material and a preparation method, in particular to a modified straw / polyethylene composite material and a preparation method. Background technique [0002] The lack of wood resources has become a bottleneck restricting the development of my country's forestry industry. How to effectively use non-wood (such as bamboo, grass, crop straw, etc.) resources to develop wood-based panel industry has always been one of the concerns of the industry. my country is a large agricultural production country. According to statistics, my country currently produces about 300 million tons of rice straw. After taking into account the collection, storage, transportation and other technical issues and deducting other uses, based on the utilization rate of 25%, there are about 75 million tons per year, and about 75 million cubic meters of straw boards can be produced. While the HDPE industry is booming, a large amount of waste HDPE is a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L97/02C08L23/06C08K5/29B29C51/08B29C51/46
Inventor 方雪芹
Owner 常熟市慧丰塑料制品有限公司
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