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Manufacturing method of injection molding body

A technology of injection molding and manufacturing method, which is applied in the field of manufacture of injection-molded bodies, can solve the problems of low effect of reducing volatile components, and achieve the effects of reducing metal content and excellent resistance to humidity and heat

Active Publication Date: 2015-04-22
TORAY IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this method, although it is true that ionic impurities and volatile components can be reduced, in the examples, since the dry PPS was treated at 180°C for 4 hours under nitrogen flow, the reduction effect of volatile components was relatively low.

Method used

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  • Manufacturing method of injection molding body
  • Manufacturing method of injection molding body
  • Manufacturing method of injection molding body

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0113] Hereinafter, although an Example is given and this invention is demonstrated more concretely, this invention is not limited to these Examples.

[0114] In the following examples, regarding material properties, evaluations were performed by the following methods.

[0115] [Gas generation amount]

[0116] 3 g of PPS resin was measured into a glass ampoule with an abdomen size of 100 mm×25 mm, a neck size of 255 mm×12 mm, and a wall thickness of 1 mm, followed by vacuum sealing. Only the body part of this glass ampoule was inserted into a ceramic electric tube furnace ARF-30K manufactured by Asahi Rika Seisakusho, and heated at 320° C. for 2 hours. The ampoule was removed, and the neck of the ampoule, which had not been heated by the tubular furnace, with the volatile gas attached, was cut with a file and weighed. Next, the adhered gas was dissolved and removed in 5 g of chloroform, dried in a glass drier at 60° C. for 1 hour, and weighed again. The difference in weight...

reference example 1

[0136] [Reference Example 1] Preparation of PPS-1

[0137] To an autoclave with a stirrer and a valve at the bottom was added 8267.4g (70.0 moles) of 47.5% sodium hydrosulfide, 2925.0g (70.2 moles) of 96% sodium hydroxide, 13860.0g (140.0 moles) of N-methyl-2- Pyrrolidone (NMP), 1894.2g (23.1 moles) of sodium acetate, and 10500.0g of ion-exchanged water were gradually heated to 240°C over about 3 hours while feeding nitrogen under normal pressure, and 14772.1g of water and 280.0g of NMP were distilled out. The reaction vessel was then cooled to 160°C. The amount of water remaining in the system was 1.08 mol per 1 mol of the added alkali metal sulfide, and this amount included the water consumed by the hydrolysis of NMP. In addition, the amount of hydrogen sulfide scattered was 0.023 mol per 1 mol of the added alkali metal sulfide.

[0138] Next, 10646.7g (72.4 moles) of p-dichlorobenzene (p-DCB) and 6444.9g (65.1 moles) of NMP were added, the reaction vessel was sealed under...

reference example 2

[0140] [Reference Example 2] Preparation of PPS-2

[0141] Except not adding sodium acetate at the time of polymerization, it superposed|polymerized similarly to the reference example 1, and obtained 16800g of cakes of PPS-2 (7550g of PPS resins were contained in the inside).

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Abstract

The invention provides a manufacturing method of an injection molding body. The manufacturing method is characterized in that a polyphenylene sulfide resin is subjected to acid treatment by using an acid treatment process; subsequently thermal oxidation treatment is carried out by using a thermal oxidation process so as to manufacture the polyphenylene sulfide resin (A) with specific property; a resin composition containing the polyphenylene sulfide resin (A) is subjected to injection molding under specific conditions; the difference between the maximum length and the minimum length of bar-shaped molded bodies obtained from injection molding of 100 times is calculated; and the difference between the maximum length and the minimum length is less than 10% relative to the average length of the bar-shaped molded bodies subjected to 100 times of injection.

Description

[0001] This application is a divisional application of a Chinese patent application with an application date of November 8, 2007, an application number of 200780102158.8, and an invention title of "Method for Manufacturing Polyphenylene Sulfide Resin". technical field [0002] The present invention relates to a method for producing a polyphenylene sulfide resin having excellent melt fluidity, low metal content and generation of volatile components during melting, and excellent molding stability and heat-and-moisture resistance. Background technique [0003] Polyphenylene sulfide (hereinafter referred to as PPS) resin has excellent heat resistance, barrier properties, chemical resistance, electrical insulation, heat and humidity resistance and other properties suitable for engineering plastics, so it is used for injection molding, extrusion molding It is mainly used in various electrical and electronic parts, machine parts, automobile parts, films, fibers, etc. [0004] Howev...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G75/02C08G75/0209C08G75/0259
Inventor 东原武志真壁芳树中村直也斋藤圭石王敦井之原雅博
Owner TORAY IND INC