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Agricultural residue wheat straw pencil and production method thereof

A technology of leftovers and wheat straw, applied in non-mechanical pencil, pen holder, printing and other directions, can solve the problems of waste of straw resources, traffic and ecological environment pollution, and achieve the effect of low price

Inactive Publication Date: 2011-10-05
匡赞辉
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A large amount of straw is left, and it is common to pile up and burn it everywhere, which not only causes waste of straw resources, but also pollutes traffic and the ecological environment

Method used

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  • Agricultural residue wheat straw pencil and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Add 100 parts by mass of recovered polyethylene terephthalate scraps and 30 parts by mass of ethanolamine to the reaction kettle, stir, heat to 190-220°C, and react for 2 hours to obtain polyester-amide polyol; cool down to 75 At ~80°C, add 150 parts by mass of toluene diisocyanate into the reaction kettle, stir and react for 3 hours, and obtain the isocyanate-terminated polyurethane adhesive;

[0038] The wheat straw is dried in the air, dried, and the water content is 14.9% by mass, crushed, sieved, and the whole powder of wheat straw with a particle size less than 20 meshes is collected, and sealed for later use;

[0039] Add the dry wheat straw powder into a high-speed mixer, spray the isocyanate-terminated polyurethane adhesive into it under high pressure, stir and blend at room temperature for 10 minutes, and obtain the glue-sprayed wheat straw powder, wherein the isocyanate-terminated polyurethane accounts for 1.5% of the absolute dry mass of the wheat straw powde...

Embodiment 2

[0042] Add 100 parts by mass of recovered polyethylene terephthalate scraps and 50 parts by mass of ethanolamine to the reaction kettle, stir, heat to 190-220°C, and react for 2 hours to obtain polyester-amide polyol; cool down to 75 At ~80°C, add 180 parts by mass of toluene diisocyanate into the reaction kettle, stir and react for 3 hours, and obtain the isocyanate-terminated polyurethane adhesive;

[0043] Drying the wheat straw, drying, the water content of the wheat straw is 3%, crushing, sieving, collecting the whole powder of the wheat straw with a particle size less than 20 meshes, and sealing it for later use;

[0044] Add the dry wheat straw powder into a high-speed mixer, spray the isocyanate-terminated polyurethane adhesive into it under high pressure, stir and blend at room temperature for 10 minutes, and obtain the glue-sprayed wheat straw powder, wherein the isocyanate-terminated polyurethane accounts for 4% of the absolute dry mass of the wheat straw powder;

[0...

Embodiment 3

[0047] Add 100 parts by mass of recycled polyethylene terephthalate scraps and 40 parts by mass of ethanolamine to the reaction kettle, stir, heat to 190-220°C, and react for 2 hours to obtain polyester-amide polyol; cool down to 75 At ~80°C, add 165 parts by mass of toluene diisocyanate into the reaction kettle, stir and react for 3 hours, and obtain the isocyanate-terminated polyurethane adhesive;

[0048] Drying the wheat straw, drying, the water content of the wheat straw is 9%, crushing, sieving, collecting the whole wheat straw powder with a particle size less than 20 meshes, and sealing it for later use;

[0049] Add the dry wheat straw powder into a high-speed mixer, spray the isocyanate-terminated polyurethane adhesive into it at high pressure, stir and blend at room temperature for 10 minutes, and obtain the glue-sprayed wheat straw powder, wherein the isocyanate-terminated polyurethane accounts for 2.5% of the dry mass of the wheat straw powder;

[0050] Filling the...

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Abstract

The invention relates to an agricultural residue wheat straw pencil and a production method thereof. The production method is characterized by comprising the steps of obtaining polyester-amide polyol by utilizing a chemical reaction of recovered polyethylene terephthalate and adding toluene diisocynate so as to obtain an isocyanate-terminated polyurethane adhesive, drying wheat straws and smashing into wheat straw whole powder with granularity of less than 20 meshes, mixing the isocyanate-terminated polyurethane adhesive with the wheat straw whole powder, hot-pressing the mixture, filling in a pencil lead and cold-pressing to obtain the pencil. The pencil produced by utilizing the method has a nature appearance similar to wood and high penholder bonding fastness; the wood is replaced by agricultural residue wheat straws; the raw material resource in our country is vast; and therefore, the price is low and a very important significance is provided for environmental protection and ecological balance of our country.

Description

technical field [0001] The invention relates to an agricultural residue wheat straw pencil and a preparation method thereof, belonging to the technical field of light industrial products. Background technique [0002] Pencil is a kind of cultural school supplies commonly used by people. According to reports, my country provides 6 to 7 billion pencils to the world market every year, and is the world's largest exporter of pencils. Wooden pencils are the main type of pencil exports, and the export volume consumes more than 200,000 cubic meters of wood annually. . my country's per capita forest tree share is far lower than the world's average level, ranking 107th in the world. The wood used in wooden pencils is mainly basswood, while my country's basswood species are relatively scarce, and the growth cycle of high-quality basswood is as long as 60 to 70 years. . Therefore, although the export of wooden pencils has been exchanged for foreign exchange, it is at the cost of a larg...

Claims

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Application Information

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IPC IPC(8): B43K19/02B43K19/16B43K3/00
Inventor 匡赞辉
Owner 匡赞辉
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