Synthesized stalk profile and its prepn

Abstract

The synthesized stalk profile is prepared with crop stalk powder 40-70 wt%, plastic resin 20-40 wt%, calcium carbonate 5-15 wt%, fire retardant 1-3 wt%, antiager 1-2 wt%, lubricant 1-3 wt% and brightener 1-2 wt%. The preparation process includes the following steps: drying crop stalk to water content of 8-15 wt% and crushing to 100-300 mesh; mixing materials in the said proportion and blending in a blender at 130-170 deg.c for 10-15 min; extruding in a double screw extruder and cooling to form. The present invention has low cost, rich material source and simple preparation process, and the profile has high compactness, excellent mechanical performance and other advantages.

Description

technical field [0001] The invention relates to a straw synthetic section material and a preparation method thereof, in particular to a straw synthetic section material utilizing postharvest waste straw of crops and a preparation method thereof. Background technique [0002] As a by-product of agricultural production, crop straw has a large output and wide distribution, and is also an important biological resource. According to statistics, the current crop straw production in my country is about 500-600 million tons per year. The crop straw utilization technology is The excess waste stalks are processed into another usable product through various processing channels. For a long time, extensive research has been carried out on the comprehensive utilization of crop stalks at home and abroad, and many available approaches have been obtained. Utilize the existing patent report of the method for processing plate with crop stalk, for example: CN1047470A, CN1383966A, CN1225866A, CN...

AI Technical Summary

Problems solved by technology

Utilize the existing patent report of the method for processing plate with crop stalk, for example: CN1047470A, CN1383966A, CN1225866A, CN1249316A, CN92106742.1, CN93116667, its manufacture process of the patent of report is that stalk is pulverized, cut into small sections or use wire rope Woven into sheets, all of them are blended and stirred with adhesives, and hot-pressed and solidified in molds of different specifications. These adhesives used contain toxic and harmful solvent substances (such as formaldehyde, toluene and phenol), which are harmful to the human body. , causing pollution to the environment, and the mechanical properties are also poor, and the cost is also high

However, there are not many utilization approaches that can really form large-scale production, and can consume a large amount of straw, or the economic benefits are not significant and the value-added is not large; or there are still some problems in terms of process, technology, quality, and environmental pollution.

Therefore, straw is used as waste in many places, which is not only a great waste of resources, but also causes huge economic losses, and also causes a lot of pollution to the environment.