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

Light-weight high-strength PBT material and preparation method thereof

A high-strength, light-weight technology, applied in the field of polymer materials, can solve the problems of large cells, unevenness, and decreased mechanical properties, and achieve the effects of reducing density, increasing the specific strength of bending and stretching, and realizing light weight

Inactive Publication Date: 2020-05-12
快思瑞科技(上海)有限公司
View PDF10 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The PBT foam material prepared by compound chemical foaming agent has large and uneven cells, and the mechanical properties are seriously reduced.

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
  • Light-weight high-strength PBT material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Put 500 parts by weight of polybutylene terephthalate (PBT) in an oven, and dry at 130° C. for 2-3 hours. The form of microspheres is masterbatch, and the amount of microspheres added is 10 parts, 5 parts of DOP (dioctyl phthalate), 10 parts of maleic anhydride graft, and mixed in a mixer for 5 minutes. Enter the single-screw injection molding machine through the feeding port for injection, set the temperature of the multi-stage screw at 220-250°C, the injection pressure at 1.0MPa, the back pressure at 0.04MPa, the screw speed at 35rpm, the holding time at 5s, and control the mold temperature at 12°C, the mold is a standard dumbbell-shaped mold.

Embodiment 2

[0033] Put 500 parts by weight of polybutylene terephthalate (PBT) in an oven, and dry at 110° C. for 2-3 hours. The form of microspheres is dry powder, the amount of microspheres added is 10 parts, add 5 parts of DOP (dioctyl phthalate), 5 parts of white oil (lubricant), 5 parts of antioxidant 1010, and mix in the mixer for 5 minutes Even after. Add the injection molding into the single-screw injection molding machine through the feeding port, set the temperature of the multi-stage screw at 230-260°C, the injection pressure at 1.5MPa, the back pressure at 0.04MPa, the screw speed at 25rpm, the holding time at 5s, and control the mold temperature at 15°C, the mold is a standard dumbbell-shaped mold.

Embodiment 3

[0037] Put 500 parts by weight of polybutylene terephthalate (PBT) in an oven and dry at 110-150°C for 2-3 hours. The form of microspheres is dry powder, the amount of microspheres added is 5 parts, 5 parts of white oil lubricant and 10 parts of maleic anhydride graft are added, and mixed in a mixer for 5 minutes. Add the injection molding into the single-screw injection molding machine through the feeding port, set the temperature of the multi-stage screw at 220-240°C, the injection pressure at 1.6MPa, the back pressure at 0.02MPa, the screw speed at 35rpm, the holding time at 5s, and control the mold temperature at 20°C, the mold is a standard dumbbell-shaped mold.

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

No PUM Login to View More

Abstract

The invention discloses a light-weight high-strength PBT material and a preparation method thereof. The PBT material comprises PBT plastic particles, an auxiliary agent and expandable microspheres. The expandable microsphere is of a shell-core structure, wherein a shell material is a thermoplastic polymer, and a core material is a foaming agent with the boiling point not higher than boiling pointof the shell material. The preparation method comprises the following steps: adding the auxiliary agent and the color master batch into the PBT plastic particles as required, then adding the expandable microspheres, and uniformly mixing; injecting the mixture into an injection molding machine through a feeding port, and melting the mixture through heating of a charging barrel; and injecting the molten mixture into a mold, and carrying out injection molding. In the injection molding process, the microsphere shell is heated to be softened and expanded in size to form stable foam holes with similar sizes. After the microspheres are expanded, gas is mainly contained in the spheres, the density of an injection molding part can be well reduced, and light weight is achieved; after the proper temperature and pressure are adjusted, the weight of the PBT material can be reduced by 10%-30%, and the bending strength and the tensile strength are both improved.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a method for preparing light-weight and high-strength PBT materials by adding expandable microspheres. Background technique [0002] Engineering plastic polybutylene terephthalate (PBT) has the advantages of heat resistance, high mechanical strength, high insulation, low water absorption and low friction, and is widely used in electronic appliances, automobile industry and office machinery and other fields. With the expansion of the application field of engineering plastic PBT, there is an urgent need to reduce the density of injection molded parts and reduce the amount of materials used, but at the same time, it is hoped that the material can still maintain a high specific strength. [0003] Expandable microspheres are microspheres in which synthetic polymer materials wrap dispersed liquids or even gases to form a core-shell structure. The shell of the microsphere so...

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
IPC IPC(8): C08L67/02C08J9/32
CPCC08J9/32C08J2203/22C08J2367/02
Inventor 朱纳鑫章超高亮
Owner 快思瑞科技(上海)有限公司
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