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Polyacetal resin molding

A technology of polyacetal resin and molded body, applied in the field of polyacetal resin molded body, can solve the problems of sticking, difficult to produce products, sticking of molded body, etc., and achieve excellent blocking resistance, stable sliding property, and low odor. excellent effect

Active Publication Date: 2018-08-24
ASAHI KASEI KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In such an environment where a load is applied, molded parts tend to stick to each other (blocking)
If such blocking occurs, bridging (a phenomenon in which the molded body is blocked inside and cannot be discharged from the discharge port) occurs when the molded body is introduced into the hopper, so it is difficult to produce products stably.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1、2

[0208] [Example 1, 2, Comparative Examples 1-4]

[0209] Each component was blended in the ratio shown in Table 1, and melt-kneaded according to the above-mentioned production method to obtain a resin molded body. Using the obtained molded body, various physical properties were evaluated. By changing the production method based on the results, a molded article having the desired shape in this embodiment can be obtained. It can be seen that in Examples 1 and 2 where such a molded article was obtained, the amount of fine powder was reduced, the blocking property was improved, and formaldehyde was released. amount decreased. It was also found that the color change and the intensity of the odor were improved after injection molding.

[0210] [Table 1]

[0211]

Embodiment 1、3～7

[0213] Each component was blended in the ratio shown in Table 2, and melt-kneaded according to the above-mentioned production method to obtain a resin molded body. Using the obtained molded body, various physical properties were evaluated. It can be seen that by changing the composition, the amount of fine powder, adhesion, and formaldehyde emission are kept at a certain level, and the performance and friction coefficient of the molded sheet change in this state, and the friction coefficient variation value is improved.

[0214] [Table 2]

[0215]

Embodiment 1、8～11

[0217] Each component was blended in the ratio shown in Table 3, and melt-kneaded according to the above-mentioned production method to obtain a resin molded body. Using the obtained molded body, various physical properties were evaluated. It can be seen that the sliding performance is further improved by using the component (C) in combination, and the variation value of the friction coefficient is also improved. In addition, it has been found that not only self-material sliding tests but also resin sliding tests and metal sliding tests can be improved by using them in combination.

[0218] [table 3]

[0219]

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Abstract

The invention relates to a polyacetal resin molded body, and particularly relates to a polyacetal resin molded body having stable sliding performance, less time-dependent color changes, low odour and excellent adhesion resistance. The polyacetal resin molded body comprises (A) polyacetal resin, (B) lubricating oil and (C) polyolefin. The long diameter of the polyacetal resin molded body is 2.5-4.0 mm, the short diameter is 1.4-2.8 mm, and the oblateness (the ratio of the long diameter to the short diameter) is larger than 1.25. In addition, the polyacetal resin molded body is further molded to obtain a component provided by the invention.

Description

technical field [0001] The present invention relates to polyacetal resin moldings. Background technique [0002] Polyacetal resins are excellent in mechanical strength, chemical resistance, sliding properties, and abrasion resistance, and are easy to process. Therefore, as a representative engineering plastic, it is used in a wide range of driving parts such as electrical equipment, automobile parts, and other parts. Due to the expansion of its application field, polyacetal resin has higher and higher performance requirements. [0003] Conventionally, in order to improve the sliding properties of polyacetal resin moldings, a method of applying grease has been used. Recently, however, grease-free is being promoted. For example, mechanical components such as gears of printers require stable sliding properties without using grease. This is because it is difficult for grease to sufficiently reduce the variation in the coefficient of friction, whereas the mechanical component...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L59/00C08L91/06C08L83/04C08L23/06C08L23/12C08L47/00C08L51/06C08L23/00
CPCC08L59/00C08L2205/03C08L2205/035C08L2207/04C08L91/06C08L23/06C08L23/12C08L47/00C08L51/06C08L23/00
Inventor 都筑隼一三好贵章
Owner ASAHI KASEI KK
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