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High-pressure hardening processing technology for inner wall of foamed plastic box body

A technology of foam plastics and processing technology, applied in the field of foam plastics, can solve the problems of limited impact resistance of foam plastics and damage to foam plastic boxes, and achieve the effects of improving stiffness and strength, not easy to bend, and convenient operation

Pending Publication Date: 2021-11-26
安徽正瀚新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Most of the existing foam plastic boxes rely on their own impact resistance to resist impact, but the impact resistance of foam plastic itself is limited, so that it can only be used for preliminary impact resistance operations, which may easily cause damage to the foam plastic box

Method used

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  • High-pressure hardening processing technology for inner wall of foamed plastic box body
  • High-pressure hardening processing technology for inner wall of foamed plastic box body
  • High-pressure hardening processing technology for inner wall of foamed plastic box body

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1), Weighing raw materials: The raw materials are taken according to parts by weight: 75 parts of foamable polypropylene material, 16 parts of epoxy resin, 17 parts of solvent, 25 parts of ceramic glaze, 16 parts of wood fiber powder, flame retardant 6 parts of synergist, 23 parts of modified sepiolite, 7 parts of blowing agent, 11 parts of foam stabilizer, wherein the solvent is toluene, and the blowing agent is azodicarbonamide, and the polyvinyl chloride is made by blowing agent To expand.

[0030] (2) Heating: heat the expandable polypropylene material particles to 195° C., heat and melt for 38 minutes to obtain molten expandable polypropylene material;

[0031] (3), mixing raw materials: adding all the raw materials except the blowing agent in step (1) to the foamable polypropylene material in the molten state in step (2) in order to obtain the mixed material, wherein, Before mixing the raw materials, the raw materials in each component need to be filtered to scr...

Embodiment 2

[0038] (1), Weigh raw materials: the raw materials are taken according to parts by weight: 90 parts of foamable polypropylene material, 21 parts of epoxy resin, 19 parts of solvent, 33 parts of ceramic glaze, 22 parts of wood fiber powder, flame retardant 3 parts of synergist, 27 parts of modified sepiolite, 7 parts of blowing agent, 7 parts of foam stabilizer, wherein the solvent is a mixed solution of toluene and decahydronaphthalene, and the blowing agent is azodicarbonamide, three A mixed liquid of chlorofluoromethane and dichlorodifluoromethane, which expands polyvinyl chloride through a blowing agent.

[0039] (2) Heating: heat the expandable polypropylene material particles to 205°C, heat and melt for 38 minutes to obtain molten expandable polypropylene material;

[0040] (3), mixing raw materials: adding all the raw materials except the blowing agent in step (1) to the foamable polypropylene material in the molten state in step (2) in order to obtain the mixed material...

Embodiment 3

[0047] (1), Weigh raw materials: the raw materials are taken according to parts by weight: 87 parts of foamable polypropylene material, 17 parts of epoxy resin, 11 parts of solvent, 29 parts of ceramic glaze, 13 parts of wood fiber powder, flame retardant 4 parts of synergist, 24 parts of modified sepiolite, 9 parts of blowing agent, and 8 parts of foam stabilizer, wherein the solvent is toluene, and the blowing agent is isopentane, and the polyvinyl chloride is expanded by the blowing agent .

[0048] (2) Heating: heat the expandable polypropylene material particles to 198°C, keep warm and melt for 41 minutes to obtain molten expandable polypropylene material;

[0049](3), mixing raw materials: adding all the raw materials except the blowing agent in step (1) to the foamable polypropylene material in the molten state in step (2) in order to obtain the mixed material, wherein, Before mixing the raw materials, the raw materials in each component need to be filtered to screen o...

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Abstract

The invention discloses a high-pressure hardening processing technology for the inner wall of a foamed plastic box body. The high-pressure hardening processing technology comprises the following steps that raw materials are weighed; foamable polypropylene material particles are heated to 189-210 DEG C, heat preservation melting is conducted for 35-45 minutes, and a molten foamable polypropylene material is obtained; all the raw materials except a foaming agent are sequentially added into the foamable polypropylene material in the molten state, and a mixture is obtained; and afterwards, the obtained mixture and the foaming agent are placed in a high-pressure foaming machine together, heating or heat dissipation is conducted till the material temperature ranges from 20 DEG C to 30 DEG C, and the circulating pressure of the high-pressure foaming machine ranges from 9 kg / cm<2> to 11 kg / cm<2>. According to the high-pressure hardening processing technology for the inner wall of the foamed plastic box body, the technological process is simple, operation is convenient, the high-hardness inner wall layer is produced through high temperature and high pressure, therefore, the structural strength of the foamed plastic box is improved, the impact resistance is improved, the foamed plastic box is not prone to damage in the packaging and transporting process, the stiffness and strength of the foam box are improved, and the foam box is not prone to being bent in the carrying process.

Description

technical field [0001] The invention relates to the technical field of foam plastics, in particular to a high-pressure hardening process for the inner wall of a foam plastic box. Background technique [0002] Foam plastic is a kind of polymer material formed by dispersing a large number of gas micropores in solid plastic. It has the characteristics of light weight, heat insulation, sound absorption, shock absorption, etc., and its dielectric performance is better than that of matrix resin. It has a wide range of uses. Almost all kinds of plastics can be made into foamed plastics. Foam molding has become an important field in plastic processing. Foamed plastics are polymer materials with plastic as the basic component and contain a large number of bubbles. Therefore, it can also be said that it is filled with gas. composite plastic. Compared with pure plastic, it has many excellent properties, such as light weight, high specific strength, absorbable impact load, good heat in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29D22/00B29K23/00B29K63/00B29K105/00
CPCB29D22/003B29K2023/12B29K2063/00B29K2105/0005B29K2105/0044B29K2105/0073B29K2105/251
Inventor 余景正杨在勇
Owner 安徽正瀚新材料科技有限公司