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Preparation method of ramie stem and plastic composite material

A technology of composite materials and ramie stems, which is applied in the field of preparation of ramie stems and plastic composite materials, to achieve the effects of good processability, low price and high dimensional stability

Inactive Publication Date: 2009-05-27
BILIC FORTUNE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method uses ramie rods as raw materials, which solves the compatibility problem between ramie fibers and plastics, and the composite materials produced can completely replace the existing wood-plastic composite materials.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The first step is to use a 300-type German wood flour machine to crush the ramie stalks into 20-40 mesh ramie stalk powders, then dry the ramie stalk powders with hot air at 90°C for 24 hours, and control the water content within 3%; Dry LDPE and maleic anhydride grafted polyethylene at 70°C for 4 hours;

[0018] In the second step, the ramie stalk powder is sprayed with silane coupling agent KH550 in the kneader, the dosage is 1.5% of the weight of the ramie stalk powder, the temperature is 100°C, and the kneading time is 40 minutes, so that the coupling agent can evenly coat the ramie stalk powder and improve its Compatibility with the plastic substrate (coupling agent is diluted according to the weight ratio of coupling agent: dehydrated alcohol=1: 3 when spraying), makes modified ramie stalk powder;

[0019] In the third step, in parts by weight, 30 parts of modified ramie stalk powder and 70 parts of LDPE, 5 parts of maleic anhydride grafted polyethylene, 1 part of...

Embodiment 2

[0023] The first step is to crush the ramie stalks into 20-40 mesh ramie stalk powder, then dry the ramie stalk powder with hot air at 95°C for 22 hours, and control the water content within 3%; at the same time, dry LDPE and Malay Anhydride grafted polyethylene for 3 hours;

[0024] In the second step, the ramie stalk powder is sprayed with titanate coupling agent NDZ-101 in the kneader. : the weight ratio dilution of dehydrated alcohol=1: 3), makes modified ramie stalk powder;

[0025] In the third step, in parts by weight, 30 parts of modified ramie stalk powder and 70 parts of LDPE, 5 parts of maleic anhydride grafted polyethylene, 1 part of stearic acid, 2 parts of PE wax, 0.1 part of antioxidant 1010, 0.05 168 parts of antioxidant are mixed evenly;

[0026] The fourth step is to extrude the above-mentioned mixed material through a co-rotating twin-screw extruder, the screw heating temperature is 120-150° C., and the screw speed is 60-100 rpm to obtain the ramie stem an...

Embodiment 3

[0029] The first step is to crush the ramie stalks into 40-60 mesh ramie stalk powder, then dry the ramie stalk powder with hot air at 100°C for 20 hours, and control the water content within 3%; meanwhile, dry HDPE and stalk powder at 90°C for 3 hours respectively. Maleic anhydride grafted high-density polyethylene;

[0030] The 2nd step ramie stalk powder sprays silane coupling agent KH550 in the kneader, consumption is 1.5% of ramie stalk powder weight, 110 ℃ of temperature, kneading time 60 minutes (coupling agent is according to coupling agent when spraying: dehydrated alcohol =1:3 weight ratio dilution), makes modified ramie stalk powder;

[0031] The third step is in parts by weight, with 40 parts of modified ramie stalk powder and 60 parts of HDPE, 5 parts of maleic anhydride grafted high-density polyethylene, 1 part of stearic acid, 2 parts of EBS, 0.1 part of antioxidant 1010, 0.05 parts of Antioxidant 168 are mixed evenly;

[0032] The fourth step is to extrude th...

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Abstract

This invention provides a preparation of a ramie stipe and plastic composite, including drying after shattering of ramie stipe, drying plastic gum and compatible agent separately, and aspersing couplant on ramie stipe powder. The dose of couplant is about 1-2% of ramie stipe powder. The weight amount is that ramie stipe powder 30-50, plastic gum 50-70, compatible agent 5-10, lubricant 2-4, antioxidant 0.1-0.3, bulking agent 0-10, fire - retardant agent 0-20, then uniformly mixed and extruding the mixture from the forcing machine. This invention solves the problem of the compatibility between herb fiber and plastic, and the surface treatment technology of raw materials.

Description

technical field [0001] The invention relates to the technical field of natural fiber composite materials and wood-plastic composite materials, in particular to a preparation method of ramie stems and plastic composite materials. Background technique [0002] Ramie is a unique herb plant in my country, known as "Chinese grass" internationally. According to the statistics of the Food and Agriculture Organization of the United Nations, my country's ramie production accounts for more than 98% of the world's total in recent years. People usually mainly use the bast fiber part of ramie as the fine fiber raw material of textiles (ramie fiber is the longest among all kinds of hemp fibers, generally 60-200mm long, and the longest can reach 600mm), while fresh ramie is stripped The last hemp stalk and epidermis are treated as waste incineration. These wastes account for about 2 / 3 of the whole ramie, and their main components are cellulose and hemicellulose. Incineration treatment no...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L51/06C08K5/09B29C47/40C08L97/02C08K3/22C08K3/26C08K3/36
Inventor 蒋迪清郭晶晶谢开冀
Owner BILIC FORTUNE TECH
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