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Low-density polypropylene bead foam and preparation method and application thereof

A low-density polypropylene and foam technology, applied in the field of low-density polypropylene bead foam and its preparation, can solve the problems of low product yield, poor process instability, low production efficiency, etc. Good operability and safety, and the effect of improving cell nucleation density

Active Publication Date: 2020-05-19
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

The kettle pressure foaming method has defects such as low production efficiency, poor process stability, and low product yield, and there are certain safety hazards in the production process

Method used

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  • Low-density polypropylene bead foam and preparation method and application thereof
  • Low-density polypropylene bead foam and preparation method and application thereof
  • Low-density polypropylene bead foam and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0037] 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). PTFE solid powder is produced by Japan Mitsubishi Chemical Corporation, its model is A-3000. Talc powder is plastic grade talc powder produced by Shenzhen Haiyang Powder Technology Co., Ltd., and its fineness is 5000 mesh. Supercritical fluid I is carbon dioxide with a purity of 99.9%. Supercritical fluid II is nitrogen with a purity of 99.5%. The addition amount of above-mentioned raw material is shown in table 1.

[0038] Table 1

[0039] components PP PTFE talcum powder supercritical carbon dioxide supercritical nitrogen Addition amount / mass percentage margin 2.8 3.0 7.5 0.15

[0040] Using the above-mentioned raw materials of this embodiment to prepare low-density polypropylene bead foam includes the following steps: adding PP, PTFE, and talcum powd...

no. 2 example

[0045]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). PTFE solid powder is produced by Japan Mitsubishi Chemical Corporation, its model is A-3000. Talc powder is a plastic grade talcum powder produced by Shenzhen Haiyang Powder Technology Co., Ltd., with a fineness of 10,000 mesh. Supercritical fluid I is carbon dioxide with a purity of 99.9%, and supercritical fluid II is nitrogen with a purity of 99.5%. The addition amount of above-mentioned raw material is shown in table 2.

[0046] Table 2

[0047] components PP PTFE talcum powder supercritical carbon dioxide supercritical nitrogen Addition amount / mass percentage margin 7.0 2.0 4.5 0.25

[0048] Using the above-mentioned raw materials in this embodiment to prepare low-density polypropylene bead foam, the steps are the same as those in the f...

no. 3 example

[0051] Raw materials include: Isotactic polypropylene produced by Nippon Polypropylene Group with a density of 0.905g / cm 3 (@23°C), the melt index is 5.0g / 10min (@230°C / 2.16kg). PTFE solid powder is produced by Mitsubishi Chemical Co., Ltd., and its model is A-3000. Talc powder is plastic grade talcum powder produced by Shenzhen Haiyang Powder Technology Co., Ltd., and its fineness is 1000 mesh. Supercritical fluid I is carbon dioxide with a purity of 99.9%, and supercritical fluid II is nitrogen with a purity of 99.5%. The addition amount of above-mentioned raw material is shown in Table 3.

[0052] table 3

[0053] components PP PTFE talcum powder supercritical carbon dioxide supercritical nitrogen Addition amount / mass percentage margin 3.0 5.0 10 0.6

[0054] Using the above-mentioned raw materials in this embodiment to prepare low-density polypropylene bead foam, the steps are the same as those in the first embodiment; the difference ...

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Abstract

The invention relates to the technical field of microporous plastic preparation, in particular to low-density polypropylene bead foam and a preparation method and application thereof. The foam is prepared from the following raw materials in percentage by mass: 80-98% of PP, 0.5-12% of PTFE, 0.5-10% of talcum powder, 2-10% of supercritical carbon dioxide and 0.1-1% of supercritical nitrogen. The foaming ratio of a foaming product can reach 54 times, the density of the foaming product can be as low as 0.016 g / cm<3>, the average size of foam holes is smaller than 40 microns, the foaming product has a foam hole structure which is finer, more uniform, more regular and higher in porosity, and the closed pore rate can reach 95%.

Description

technical field [0001] The invention relates to the technical field of microporous plastic preparation, in particular to a low-density polypropylene bead foam and its preparation method and application. Background technique [0002] Polypropylene (PP) bead foam is a bead-like material with a porous structure made of polypropylene as a matrix and foamed. Compared with conventional polystyrene (PS) bead foam, PP bead foam has better heat resistance, corrosion resistance, mechanical properties, sound attenuation and shock absorption performance, and environmental protection characteristics. PP bead foam can be used to form and process foam products with a certain structural shape. Its products have excellent heat insulation performance, mechanical performance, weather resistance and corrosion resistance performance, and have very wide applications in the fields of heat insulation, shock absorption and buffering, safety protection, etc. prospect. At present, PP bead foam is ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/12C08J9/16C08J9/228C08L23/12C08L23/14C08L27/18C08K3/34
CPCC08J9/0066C08J9/122C08J9/16C08J9/228C08J2203/06C08J2203/08C08J2205/052C08J2323/12C08J2323/14C08J2427/18
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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