polyacetal resin composition

A technology of polyacetal resin and composition, applied in the field of polyacetal resin composition, can solve the problems of poor working environment, damage to the surface of molded products, and reduced dimensional accuracy of molded products, etc., and achieves excellent weather resistance, adhesion prevention, The effect of high creep characteristics

Active Publication Date: 2017-11-03
ASAHI KASEI KK
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In addition, the polyacetal resin has the following problems: lack of thermal stability, formaldehyde gas is generated due to thermal decomposition during molding processing, thereby deteriorating the working environment; in addition, the generated formaldehyde comes from the The volatile components of additives such as stabilizers are separated out to the surface of the mold, forming so-called mold deposits, resulting in serious damage to the surface of the molded product; or causing a decrease in the dimensional accuracy of the molded product; etc.
In addition, there is a problem that in the case of mold deposits, the mold must be disassembled and cleaned every time mold deposits occur, which requires a lot of time and labor, resulting in a decrease in productivity

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
  • polyacetal resin composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～7

[0123] 100 parts by mass of (A) polyacetal resin (melting point: 164.5° C.) produced above and 0.15 parts by mass of calcium stearate as a formic acid scavenger were uniformly mixed using a Henschel mixer to obtain a mixture. The mixture was fed from the main inlet of a twin-screw extruder with a 30mm vent port at L / D=30 set at 200°C, and (B) chlorite in the amount shown in Table 1 The group minerals and (C) weathering stabilizer were fed from the side feed port located downstream of the main feed port, and melted and kneaded at a screw speed of 100 rpm to obtain a polyacetal resin composition. The mechanical properties, high-temperature creep properties, MD properties, and weather resistance of the obtained polyacetal resin composition after heat aging were evaluated by the methods described above. The results are shown in Table 1.

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
particle sizeaaaaaaaaaa
particle sizeaaaaaaaaaa
particle sizeaaaaaaaaaa
Login to view more

Abstract

PROBLEM TO BE SOLVED: To provide a polyacetal resin composition which can prevent its deposition on a mold during injection molding, has excellent thermal stability, and has high creep properties and weather resistance.SOLUTION: A polyacetal resin composition comprises (A) polyacetal resin of 100 pts.mass, (B) chlorite group mineral of 0.001-5 pts.mass, and (C) weathering stabilizer of 0.1-5 pts.mass.

Description

technical field [0001] The present invention relates to polyacetal resin compositions. Background technique [0002] Polyacetal resin is a crystalline resin and is a resin material excellent in rigidity, strength, toughness, sliding properties and creep properties. Polyacetal resins are widely used as materials for machine parts such as automotive parts, electrical / electronic parts, and industrial parts. However, polyacetal resins sometimes accelerate their deterioration depending on the environment in which they are used. In addition, the current situation is that the required performance of polyacetal resin is getting higher and higher due to the expansion of the application field. [0003] As such required characteristics, it is sometimes required to have the original high performance of polyacetal resin, such as the above-mentioned excellent balance of mechanical properties, while improving thermal stability and creep under severe use environments. Change characterist...

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 Patents(China)
IPC IPC(8): C08L59/04C08K13/02C08K3/34C08K5/3475C08K5/3435
Inventor 佐佐木幸义桥本佳幸近藤知宏
Owner ASAHI KASEI KK
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