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Microcrystalline puffed straw composite powder and preparation method thereof

A technology of composite powder and straw powder, which is applied in the field of microcrystalline puffed straw composite powder and its preparation, can solve problems such as poor stiffness, black liquor pollution, and difficult degradation, and achieve the effects of reducing production costs and improving stiffness and strength

Active Publication Date: 2014-12-24
杨国平
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Using foamed plastic as the main raw material to manufacture molded packaging products not only has high cost, but also the product is not easy to degrade and easily produces white pollution.
Pulp and waste paper are used as the main raw materials to manufacture molded packaging products. The stiffness is poor, the phenomenon of moisture regain is serious, and the product is easy to bend and deform. Moreover, the raw material—pulp needs to be manufactured by adding chemical additives, resulting in serious black liquor pollution.
[0003] In the prior art, there is also a method of crushing plant straws to produce molded packaging products. However, the powder formed after straw crushing has a high density and poor fluidity, and dehydration is slow during the molding process, which affects the output, and the final product The surface smoothness is not enough, therefore, it is urgent to seek a new material for the preparation of molded packaging products

Method used

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  • Microcrystalline puffed straw composite powder and preparation method thereof

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Comparison scheme
Effect test

Embodiment 1

[0022] The invention relates to a microcrystalline puffed straw composite powder. The ratio of raw materials is: 85 parts of plant straw and 15 parts of melamine resin in parts by weight.

[0023] The plant straw is wheat straw.

[0024] Described melamine resin is tableware grade melamine resin

[0025] Its concrete preparation steps are:

[0026] (1) Cut the plant straw to a length of 2-3mm, remove dust, and add it to an extruder for expansion to obtain long fiber of plant straw. The expansion temperature is 150°C and the pressure is 0.7Mpa;

[0027] (2) Coarsely grind the long fibers of plant straw;

[0028] (3) The coarsely ground plant straw long fibers are finely ground and sieved to obtain microcrystalline puffed straw powder with a particle size of 1600 mesh;

[0029] (4) The microcrystalline puffed straw powder and the melamine resin were mixed evenly at room temperature according to the proportion, and the mixing time was 20 minutes to obtain the microcrystalline ...

Embodiment 2

[0031] The invention relates to a microcrystalline puffed straw compound powder. The ratio of raw materials is: 95 parts of plant straw and 5 parts of melamine resin in parts by weight.

[0032] The plant straw is rice straw.

[0033] Described melamine resin is tableware grade melamine resin.

[0034] Its concrete preparation steps are:

[0035] (1) Cut the plant straw to a length of 3-5mm, remove dust, and add it to an extruder for expansion to obtain long fiber of plant straw. The expansion temperature is 120°C and the pressure is 0.5Mpa;

[0036] (2) Coarsely grind the long fibers of plant straw;

[0037] (3) The coarsely ground plant straw long fibers are finely ground and sieved to obtain microcrystalline puffed straw powder with a particle size of 1600 mesh;

[0038] (4) The microcrystalline puffed straw powder and the melamine resin were mixed evenly at room temperature according to the proportion, and the mixing time was 15 minutes to obtain the microcrystalline pu...

Embodiment 3

[0040] The invention relates to a composite powder of microcrystalline puffed straw. The ratio of raw materials is: 90 parts of plant straw and 10 parts of melamine resin in parts by weight.

[0041] The plant stalks are corn stalks.

[0042] Described melamine resin is tableware grade melamine resin.

[0043] Its concrete preparation steps are:

[0044] (1) Cut the plant straw to a length of 2-5mm, remove dust, and add it to an extruder for expansion to obtain long fiber of plant straw. The expansion temperature is 130°C and the pressure is 0.8Mpa;

[0045] (2) Coarsely grind the long fibers of plant straw;

[0046] (3) The coarsely ground plant straw long fibers are finely ground and sieved to obtain microcrystalline puffed straw powder with a particle size of 1600 mesh;

[0047] (4) The microcrystalline puffed straw powder and the melamine resin were uniformly mixed in proportion at room temperature, and the mixing time was 30 minutes to obtain the microcrystalline puffe...

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Abstract

The invention relates to a new material for molding a packaging product, and a preparation method for the new material, in particular to a microcrystalline puffed straw composite powder and a preparation method thereof. The method comprises the following steps: after cutting, dust removing, puffing, coarse grinding, fine grinding and screening are conducted on plant straws used as a raw material, a small amount of melamine resin in a food grade is added, and then a main material for molding the product is obtained. The material provided by the invention can replace pulp, waste paper and foamed plastic used currently, and has the advantages of great improvement on the stiffness and strength of a molding product and great reduction in production cost. The preparation process adopts mechanical and physical methods, avoids the use of any chemical accessories and has no sewage discharge, thereby saving energy and protecting environment.

Description

technical field [0001] The invention relates to a new material for molded packaging products and a preparation method thereof, in particular to a microcrystalline puffed straw composite powder and a preparation method thereof. Background technique [0002] Molded packaging products play an indispensable role in people's daily life, and the market usage is relatively large. At present, the main raw materials used in molded packaging products are pulp and waste paper or foamed plastics. Using foamed plastic as the main raw material to manufacture molded packaging products is not only costly, but also the product is not easy to degrade, and white pollution is easy to produce. Pulp and waste paper are used as the main raw materials to manufacture molded packaging products, which have poor stiffness, serious moisture regain, and products are easy to bend and deform. Moreover, the raw material—pulp—needs to be manufactured with chemical additives, resulting in serious black liquo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L97/02C08L61/28
Inventor 王保辉刘玉峰
Owner 杨国平