Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Polyolefin resin pre-foamed particle having antistatic property, and molded article produced from the particle

A technology for polyolefin-based resins and foamed molded bodies, which is applied to the field of polyolefin-based resin pre-expanded particles and molded bodies obtained therefrom, and achieves the effects of improved productivity, less foaming, and stable dispersion.

Active Publication Date: 2010-03-24
KANEKA CORP
View PDF3 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The present invention solves the above-mentioned problems by using a polyolefin-based resin containing a specific high-molecular-type antistatic agent with reduced low-molecular-weight antistatic agents as the base resin of pre-expanded particles

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
  • Polyolefin resin pre-foamed particle having antistatic property, and molded article produced from the particle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0073] (Examples 1-2, Comparative Example 1)

[0074] Relative density is 0.9g / cm 3 100 parts by weight of an ethylene-propylene random copolymer (manufactured by Primeman Polymers Co., Ltd., E317) with an MFR of 7.0 g / 10 minutes, as a polyether-polyolefin resin block copolymer-based antistatic agent, poly Ether-polypropylene block copolymer (manufactured by Sanyo Chemical Industry Co., Ltd., trade name "PELESTAT300") was mixed in the amount shown in Table 1, and after melting and kneading with an extruder, granulation obtained polyolefin resin particles ( 1.2 mg / granule), after filling 300 parts by weight of water, 100 parts by weight of the above-mentioned polyolefin resin particles, 0.8 parts by weight of calcium phosphate as a dispersant, and 0.03 parts by weight of sodium n-alkane sulfonate in a pressure-resistant container, as Foaming agent, add 12 parts by weight of isobutane, heat up to a specified temperature under stirring, after adjusting the internal pressure of t...

Embodiment 3

[0077]As the antistatic agent, a polyether-polyolefin resin block copolymer antistatic agent (manufactured by Sanyo Chemical Industry Co., Ltd., trade name "PELESTAT230") and a low-molecular antistatic agent hydroxyalkyl monoethanolamine (Miyoshi Oil Co., Ltd., trade name "Daspa (Daspa 1) 125B", the number of carbon atoms in the alkyl group is half of 12 and 14, and the molecular weight: 285.3), the amount used is the amount shown in Table 1, and all other conditions are the same as those in the implementation In the same manner as in Example 1, pre-expanded polyolefin resin particles and in-mold molded articles were obtained. The results are shown in Table 1. Here, the apparent magnification of the polyolefin resin pre-expanded particles was 16.7.

Embodiment 4

[0079] Relative density is 0.9g / cm 3 100 parts by weight of an ethylene-propylene random copolymer with an MFR of 7.0 g / 10 minutes, using a polyether-polyolefin resin block copolymer antistatic agent (manufactured by Sanyo Chemical Industry Co., Ltd., trade name "PELESTAT303") , mixed in the amount shown in Table 1, after melting and kneading with an extruder, polyolefin-based resin particles (1.2mg / grain) were obtained, and 400 parts by weight of water, the above-mentioned polyolefin-based resin particles were filled in a pressure vessel. After 100 parts by weight, 1.4 parts by weight of calcium phosphate as a dispersant and 0.035 parts by weight of sodium n-alkanesulfonate, as a foaming agent, add 14 parts by weight of isobutane, heat up to a predetermined temperature under stirring, and adjust the internal pressure of the container Afterwards, the aqueous dispersion was released to the atmospheric pressure through the small hole nozzle arranged at the lower part of the pres...

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
melting pointaaaaaaaaaa
melt flow indexaaaaaaaaaa
electrical resistanceaaaaaaaaaa
Login to View More

Abstract

Disclosed is a polyolefin resin pre-foamed particle which is produced by foaming a polyolefin resin particle formed from a polyolefin resin composition comprising 100 parts by weight of a polyolefin resin, less than 0.01 part by weight of a low-molecular-weight antistatic agent and 5 to 30 parts by weight (inclusive) of a polyether-polyolefin resin block copolymer antistatic agent. The polyolefinresin pre-foamed particle has an antistatic property. In the production of the polyolefin resin pre-foamed particle, the dispersion state of the polyolefin resin particle formed from the polyolefin resin composition in an aqueous dispersion medium is improved compared to a conventional particle. Therefore, the productivity rate of the pre-foamed particle can be improved.

Description

technical field [0001] The present invention relates to polyolefin resin pre-expanded particles having antistatic properties and a molded body obtained therefrom. Background technique [0002] The expanded molded product made of pre-expanded polyolefin resin particles has excellent cushioning properties, heat resistance, and chemical resistance, and is used as a cushioning packaging material for general instrument parts and precision instrument parts. However, polyolefin-based resins are also excellent in electrical insulation properties, and are easily charged by friction. Therefore, there are problems in that dust and the like tend to adhere to the foamed molded body, causing dust to adhere to instrument parts and the like housed or packaged in the foamed molded body, and damage to precision instrument parts due to electrostatic destruction. In order to solve the above problems, a foamed molded article made of pre-expanded polyolefin resin particles having antistatic prop...

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): C08J9/18C08J9/232
CPCC08J2323/02C08J2453/00C08J9/0061
Inventor 三浦新太郎柴田哲也
Owner KANEKA CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com