Polypropylene foamed sheet and preparation method thereof

A technology of foamed sheet and polypropylene, which is applied in the field of polypropylene foamed sheet and its preparation, can solve the problems of limiting the use of foamed sheet, the decline of polymer mechanical properties, and low melt extensibility, etc., and achieves good Physical and mechanical properties, excellent foaming state, and good heat resistance

Inactive Publication Date: 2017-01-11
HUBEI XIANGYUAN NEW MATERIAL TECH INC
View PDF3 Cites 20 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But polypropylene has some serious drawbacks that limit its use for making foamed sheets
In particular, many conventional polypropylenes have low melt strength and / or low melt extensibility, and at the same time, degradation and modification of the polypropylene base resin and a reduction in the mechanical properties of the polymer caused by the kneading of various polymers make the Problems such as rising processing costs limit the application of foaming industrial technology

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Polypropylene foamed sheet and preparation method thereof
  • Polypropylene foamed sheet and preparation method thereof
  • Polypropylene foamed sheet and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Polypropylene foam sheet 1 component and weight ratio:

[0037]

[0038]

[0039]The melt strength of polypropylene is 20cN, the melt tensile rate is 23mm / s, the melt index is 15g / 10min, the melt index of polyethylene resin is 15g / 10min, the foaming agent is azodicarbonamide (AC), and the crosslinking agent is It is triallyl isocyanurate, and the antioxidant is antioxidant 1010.

[0040] The preparation method of polypropylene foam sheet 1:

[0041] 1) Preparation of foam masterbatch: Knead 10 parts of polypropylene, 2 parts of polyethylene, and 4 parts of foaming agent at room temperature for 15 minutes, then discharge them into an extrusion granulator for mixing and granulation to obtain foam masterbatch .

[0042] 2) Preparation of antioxidant masterbatch: Knead 8 parts of polypropylene, 2 parts of polyethylene, and 2 parts of antioxidant at room temperature for 15 minutes, then discharge them into an extrusion granulator for mixing and granulation to obtain ...

Embodiment 2

[0049] Polypropylene foam sheet 2 components and weight ratio:

[0050]

[0051]

[0052] The melt strength of polypropylene is 50cN, the melt stretching rate is 110mm / s, the melt index of polyethylene resin is 2.4 / 10min, and the melt index of polypropylene is 5.0g / 10min; the foaming agent is dinitrosopentamethylenetetramine ( DPT) and 4,4'-oxobisbenzenesulfonyl hydrazide (OBSH); the co-crosslinking agent is dimethyl siloxane; the antioxidant is antioxidant 1010.

[0053] The preparation method of polypropylene foam sheet 2:

[0054] 1) According to the raw materials of the above-mentioned foamed sheet, take by weight, polypropylene, polyethylene, foaming agent, auxiliary crosslinking agent, antioxidant and color masterbatch;

[0055] 2) Knead 15 parts of polypropylene, 0.4 parts of polyethylene and foaming agent at room temperature for 2 to 20 minutes, and then discharge them into an extrusion granulator for mixing and granulation to obtain foam masterbatch;

[0056] ...

Embodiment 3

[0064] 3 components and weight ratio of polypropylene foam sheet:

[0065] Polypropylene 50 copies polyethylene 50 copies Foaming agent 20 copies auxiliary crosslinking agent 10 copies antioxidant 0.15 parts Masterbatch 2 copies polyolefin elastomer 20 copies

[0066] The melt strength of polypropylene is 100cN, the melt tensile rate is 100mm / s, the melt index is 3g / 10min, the melt index of polyethylene resin is 2.5g / 10min, and the blowing agent is 4,4'-oxybisbenzenesulfonylhydrazide (OBSH), auxiliary cross-linking agent is triallyl isocyanurate, and antioxidant is antioxidant 1098.

[0067] The preparation method of polypropylene foam sheet 3:

[0068] 1) Preparation of foam masterbatch: knead 15 parts of polypropylene, 10 parts of polyethylene, and 20 parts of foaming agent at room temperature for 10 minutes, then discharge them into an extrusion granulator for mixing and granulation to obtain foam masterbatch .

[...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
melt strengthaaaaaaaaaa
melt flow indexaaaaaaaaaa
thicknessaaaaaaaaaa
Login to view more

Abstract

The invention discloses a polypropylene foamed sheet and a preparation method thereof. The foamed sheet is prepared from raw materials in parts by weight as follows: 100 parts of polyolefin resin, 1-20 parts of a foaming agent, 0.01-10 parts of an assistant crosslinker, 0.15-2 parts of an antioxidant, 0-3 parts of color masterbatch, 1-20 parts of polyolefin elastomers and 0-10 parts of ethylene propylene diene monomer rubber. The method comprises steps as follows: firstly, prepared foamed masterbatch, antioxidant masterbatch, sensitized masterbatch and color masterbatch are mixed with the balance of polypropylene and polyethylene, the polyolefin elastomers and the ethylene propylene diene monomer rubber, a formed sheet is extruded by an extruder, and a foamed substrate is obtained; the foamed substrate is subjected to electronic irradiation crosslinking, and a foamed master sheet is obtained; finally, the foamed master sheet is subjected to free type foaming, and the foamed sheet is obtained. According to the polypropylene foamed sheet and the preparation method thereof, polypropylene with high melt strength and polyethylene are adopted as matrix resin raw materials, formation of appropriate bubble nuclei during growing of bubbles of the foamed sheet is facilitated through irradiation crosslinking, better machinability is realized, and the foamed sheet has good physical and mechanical properties at the high temperature and can meet machining requirements under various conditions.

Description

technical field [0001] The invention relates to a polypropylene foam sheet, in particular to a polypropylene foam sheet and a preparation method thereof. Background technique [0002] Compared with other polyolefins, polypropylene foam sheet has greater rigidity, higher strength than polyethylene, better temperature resistance, and better impact toughness than polystyrene. It has been considered as a Alternatives to other thermoplastic foam sheets in industrial applications. But polypropylene has some serious drawbacks that limit its use for making foamed sheets. In particular, many conventional polypropylenes have low melt strength and / or low melt extensibility, and at the same time, there is degradation and modification of the polypropylene base resin and a decrease in the mechanical properties of the polymer caused by the kneading of various polymers, and the Problems such as rising processing costs limit the application of foaming technology in the industry. Contents...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L23/06C08L23/00C08L23/16C08J9/10B29B13/08B29B11/10
CPCC08L23/12B29B11/10B29B13/08C08J9/102C08J9/103C08J9/105C08J9/107C08J2203/04C08J2203/18C08J2203/20C08J2323/12C08J2423/00C08J2423/06C08L23/06C08L2201/08C08L2203/14C08L2205/025C08L2205/035C08L2312/06C08L23/00C08L23/16
Inventor 胡志伟魏琼
Owner HUBEI XIANGYUAN NEW MATERIAL TECH INC
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap