Expandable polypropylene beading, preparation method thereof, and its foaming beading and foaming molding products

A technology for foaming polypropylene and polypropylene is applied in the field of resin expandable beads, which can solve the problems of low absorption energy, low expansion ratio, and low heat resistance temperature.

Active Publication Date: 2008-01-16
CHINA PETROLEUM & CHEM CORP +1
View PDF3 Cites 48 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, expandable polystyrene beads and expandable polyethylene beads, which are currently used in large quantities, have the following disadvantages: low heat resistance temperature, low modulus, low energy absorption when impacted, and easy deformation, etc.
The foaming ratio is small, and the production cost of the product is high

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～12

[0072] ① Randomly copolymerize polypropylene (PPR) in component a, high melt strength polypropylene (HMSPP) in component b, low density polyethylene (LDPE) in component c, silicon dioxide (SiO 2 ), white oil, antioxidant 1010, and antioxidant 168 were mixed by a high-speed mixer, and then melted and extruded at 200 to 220°C to obtain granules The diameter is 1-2mm, and the length is 1-2mm.

[0073]② soaking foaming agent: put the above-mentioned obtained pellets together with the solution prepared by mixing water and the component b pentane, sodium dodecylbenzenesulfonate and / or OP-10 into a closed reaction kettle, Stir at 100° C. for 8 hours, so that the foaming agent and the base material can achieve better infiltration, and then cool and discharge to obtain the expandable polypropylene beads.

[0074] Wash the expandable polypropylene beads obtained above with clean water and dry them, then place them in an electric blast drying oven, and heat them to foam at a heating tem...

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 flow indexaaaaaaaaaa
melt strengthaaaaaaaaaa
diameteraaaaaaaaaa
Login to view more

Abstract

The invention provides an expandable polypropylene bead and a preparation method of the expandable polypropylene beads, and also provides foaming beads and foaming molding products of the expandable polypropylene beads, which relates to the resin expandable beads technical field. Random copolymerized polypropylene is used as basic resin, so that melting intensity can reach to an ideal range when in foaming with high melting intensity polypropylene and low density polyethylene resin being added. Expandable beads are prepared in a closed reactor without external pressure with pentane being used as foaming agent. The expandable beads contain 1 to 15 parts by weight of the high melting intensity polypropylene, 1 to 10 parts by weight of the low density polyethylene, 1.0 to 3.8 parts by weight of the foaming agent and 0.1 to 10 parts by weight of nucleating agent on the basis of 100 parts by weight of the random copolymerized polypropylene. The expandable polypropylene beads are easy to foam, whose foaming rate can reach to 16 times with uniform cells and whose foam volume weight is about 0.05 to 0.12g/cm3. The invention adopts a low-pressure method to produce the polypropylene foaming products in different shapes according to the requirement with low equipment requirement and low cost.

Description

technical field [0001] The present invention relates to resin expandable beads, and more particularly, to expandable polypropylene beads and a process for their preparation, as well as expanded beads and expanded molded articles prepared therefrom. Background technique [0002] The preparation of foams from expandable beads is an important field of application of plastic materials. It has outstanding advantages such as simple molding method, controllable shape of foam products, and easy size change, so it is widely used. [0003] However, expandable polystyrene beads and expandable polyethylene beads, which are currently used in large quantities, have the following disadvantages: low heat resistance temperature, low modulus, low energy absorption when impacted, and easy deformation. [0004] Polypropylene foam material has good high temperature resistance, high strength, large energy absorption and small deformation when impacted, so it has wider uses and application prospe...

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): C08L23/14C08J9/16C08K5/02C08L23/12C08L23/06C08K3/36C08K3/26C08K3/22
Inventor 张薇张师军刘涛尹华邵静波吕明福张丽英段淑卿吕芸王小兰李魁张浩陈力
Owner CHINA PETROLEUM & CHEM CORP
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