Unlock instant, AI-driven research and patent intelligence for your innovation.

polyacetal resin composition

A technology of polyacetal resin and composition, which is applied in the field of polyacetal resin composition, can solve the problems of reduced dimensional accuracy of molded products, poor working environment, and reduced productivity, and achieve high creep characteristics, prevent adhesion, and discoloration little effect

Active Publication Date: 2017-10-27
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 polyacetal resin containing The volatile components of additives such as stabilizers are separated out to the surface of the mold, forming the so-called mold scale, which seriously damages the surface of the molded product; or leads to 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 1～5

[0118] Using a Henschel mixer, 100 parts by mass of (A) polyacetal resin (melting point 164.5°C) produced above, triethylene glycol-bis[3-(3-tert-butyl-5-methyl) as an antioxidant -4-Hydroxyphenyl)-propionate] 0.3 parts by mass and 0.15 parts by mass of calcium distearate as a formic acid scavenger were uniformly mixed to obtain a mixture. The mixture was fed from the main feed port of a twin-screw extruder with a 30 mm vent at L / D = 30 set at 200°C. The (B) chlorite group minerals and (C) lubricant of the amount shown in table 1 are fed by the side feed inlet that is arranged on the downstream side of the main feed inlet, and with the screw speed, it is 100rpm to carry out melt kneading, thereby A polyacetal resin composition was obtained. The mechanical properties after heat aging of the obtained polyacetal resin composition, the color tone characteristics after heat aging, the high-temperature creep characteristics, and the MD characteristics were evaluated by the methods ...

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

An object of the present invention is to provide a polyacetal resin composition which can prevent adhesion (mold deposit) to a mold during injection molding, has excellent thermal stability, and has high creep characteristics. The polyacetal resin composition of this invention contains (A) 100 mass parts of polyacetal resins, (B) 0.001-5 mass parts of chlorite group minerals, and (C) 0.001-5 mass parts of lubricants.

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): C08L59/00C08K3/34C08K5/134C08K5/098
Inventor 佐佐木幸义桥本佳幸近藤知宏
Owner ASAHI KASEI KK