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A kind of low-density polypropylene foam with thermal insulation performance and its preparation method and application

A low-density polypropylene, high-performance technology, applied in the field of low-density polypropylene foam and its preparation, can solve the problems of weakening the thermal insulation performance of polypropylene foam products and poor electromagnetic wave absorption ability, and achieve the goal of promoting the refinement of cell structure, Excellent heat insulation performance, the effect of improving extrusion foaming performance

Active Publication Date: 2021-09-07
福建鑫瑞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

However, similar to polystyrene, polypropylene has very poor electromagnetic wave absorption ability in the infrared radiation band, which leads to significant radiation heat transfer in low-density polyethylene foam, which will seriously weaken the thermal insulation performance of polypropylene foam products

Method used

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  • A kind of low-density polypropylene foam with thermal insulation performance and its preparation method and application
  • A kind of low-density polypropylene foam with thermal insulation performance and its preparation method and application
  • A kind of low-density polypropylene foam with thermal insulation performance and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0044] Raw materials include: high melt strength PP produced by Borealis, the brand name is WB140HMS, and its density is 0.905g / cm 3 (@23°C), the melt index is 2.1g / 10min (@230°C / 2.16kg). The mesh number of PTFE solid powder is 100 mesh. The mesh number of flake graphite is 1000 mesh. Both supercritical carbon dioxide and nitrogen are 99.9% pure. The addition amount of above-mentioned each raw material is shown in table 1.

[0045] Table 1

[0046] components PP PTFE flake graphite supercritical carbon dioxide supercritical nitrogen Added amount / mass percentage margin 3.0 3.0 8.0 0.15

[0047] The above-mentioned raw materials in this example are used to prepare polytetrafluoroethylene and flake graphite coupled modified low-density polypropylene foam. In the preparation method, the twin-screw temperature is set at 180°C; the barrel temperature of the twin-screw extruder is changed from the Until the extrusion port is set to 60°C-175°C-190...

no. 2 example

[0050] Raw materials include: random copolymer polypropylene produced by Saudi Basic Industries Corporation (SABIC) with a density of 0.905 g / cm 3 (@23°C), the melt index is 1.7g / 10min (@230°C / 2.16kg). The mesh number of PTFE solid powder is 800 mesh. The mesh number of flake graphite is 5000 mesh. Both supercritical carbon dioxide and nitrogen are 99.9% pure. The addition amount of above-mentioned each raw material is shown in Table 2.

[0051] Table 2

[0052] components PP PTFE flake graphite supercritical carbon dioxide supercritical nitrogen Added amount / mass percentage margin 8.0 10 9.0 0.25

[0053] The above-mentioned raw materials in this example were used to prepare polytetrafluoroethylene and flake graphite coupled modified low-density polypropylene foam. In the preparation method, the twin-screw temperature was set at 200°C; the barrel temperature of the twin-screw extruder was changed from the Until the extrusion port is seq...

no. 3 example

[0056] Raw materials include: isotactic polypropylene produced by Japan Polypropylene Group, with a density of 0.905g / cm 3 (@23°C), the melt index is 5.0g / 10min (@230°C / 2.16kg). The mesh number of PTFE solid powder is 1500 mesh. The mesh number of flake graphite is 10000 mesh. Both supercritical carbon dioxide and nitrogen are 99.9% pure. The addition amount of above-mentioned each raw material is shown in Table 3.

[0057] table 3

[0058] components PP PTFE flake graphite supercritical carbon dioxide supercritical nitrogen Added amount / mass percentage margin 3.0 20.0 3.0 0.5

[0059] The above-mentioned raw materials in this example were used to prepare polytetrafluoroethylene and flake graphite coupling modified low-density polypropylene foam. In the preparation method, the twin-screw temperature was set at 220°C; the barrel temperature of the twin-screw extruder was changed from the hopper Until the extrusion port is set to 60°C-180°...

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Abstract

The invention relates to the technical field of microporous plastic preparation, and in particular to a low-density polypropylene foam with thermal insulation properties and its preparation method and application. In terms of mass percentage, the raw material composition of the foam includes: 70-90% PP, 1-15% PTFE, 1-20% flake graphite, 2-12% supercritical carbon dioxide, and 0.2-2% supercritical nitrogen. The foaming ratio of the low-density polypropylene foam prepared by the invention can reach 65 times, and the density of the foamed product can be as low as 0.014g / cm 3 , its thermal conductivity is as low as 0.029W / (m K), and it has excellent thermal insulation properties. It can be used as building exterior wall and floor insulation materials, automobile anti-collision buffer filling materials, and packaging protective materials for logistics turnover.

Description

technical field [0001] The invention relates to the technical field of preparation of microporous plastics, in particular to a low-density polypropylene foam with excellent heat insulation performance and its preparation method and application. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] Polypropylene (PP) foam products have excellent mechanical properties, flexibility, temperature resistance, corrosion resistance and thermal insulation properties, and are widely used as packaging materials, impact-resistant materials, heat insulation materials, etc. At present, low-density polypropylene foam is mainly prepared by kettle pressure foaming technology, but this technolog...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/12C08L23/14C08L27/18C08K7/00C08K3/04C08J9/12
CPCC08J9/0066C08J9/122C08J2203/06C08J2203/08C08J2323/12C08J2323/14C08J2427/18
Inventor 王桂龙柴佳龙魏超徐兆瑞赵国群董桂伟
Owner 福建鑫瑞新材料科技有限公司
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