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Process for joining piping members and piping members consisting of polyphenylene ether resin composition which are joined by the process

A technology of resin composition and connection method, applied in the direction of pipeline connection arrangement, pipe/pipe joint/pipe fitting, mechanical equipment, etc., can solve the problems of unsuitable use environment, unestablished fusion bonding conditions, unable to obtain the strength of the connecting part, etc.

Inactive Publication Date: 2011-08-24
ASAHI YUKIZAI KOGYO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the current state of joining methods using adhesives, there is no adhesive for polyphenylene ether-based resin compositions that can bond the coated surface with an adhesive and obtain the desired physical properties of piping members.
In addition, for general resin piping, the strength of the connection part cannot be obtained by the joining method by welding compared with the connection method by thermal fusion bonding or bonding, so it is not suitable for severe use environments
Therefore, it is conceivable that for the connection of piping members made of polyphenylene ether-based resin compositions, the method of thermally melting and bonding the connecting parts is preferable, but the actual situation is related to piping members made of polyphenylene ether-based resin compositions that have not yet been widely used. , the melt-bonding conditions for its hot-melt bonding have not been established

Method used

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  • Process for joining piping members and piping members consisting of polyphenylene ether resin composition which are joined by the process
  • Process for joining piping members and piping members consisting of polyphenylene ether resin composition which are joined by the process
  • Process for joining piping members and piping members consisting of polyphenylene ether resin composition which are joined by the process

Examples

Experimental program
Comparison scheme
Effect test

experiment example 1

[0083] First, an experiment for confirming the influence of MFR after kneading on the impact strength and stress crack resistance of a piping member made of a polyphenylene ether resin composition was performed.

Embodiment 1

[0085] Take polyphenylene ether resins with different molecular weights as polyphenylene ether resins A, B, and C, and mix 50 parts by mass of each polyphenylene ether resin and 50 parts by mass of high-impact polystyrene of polystyrene resin. The twin-screw extruder was used for kneading and granulation to manufacture polyphenylene ether resin compositions whose MFRs after kneading were measured to be 4.5 g / 10 minutes, 8.5 g / 10 minutes, and 11 g / 10 minutes, respectively. The MFR of the obtained resin composition after kneading was 4.5 g / 10 min. as Example 1-1, the MFR was 8.5 g / 10 min. as Example 1-2, and the MFR was 11 g / 10 min. The composition for 10 minutes was used as Comparative Example 1, and molded using a single-screw extruder at a cylinder temperature of 250°C to obtain a tube made of a polyphenylene ether resin composition with a wall thickness of 3.5 mm and an outer diameter of 32 mm, and cut out The test piece for the Izod impact test and the test piece for the st...

experiment example 2

[0092] Next, an experiment for confirming the relationship between the compounding ratio of the polyphenylene ether resin composition and the heating temperature was performed.

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Abstract

A process for joining piping members consisting of a polyphenylene ether resin composition, characterized by heat-melting both the external-circumferential portion of a spigot pipe section of one piping member and the internal -circumferential portion of a socket section of the other piping member at a temperature H ( DEG C) specified by the following formula and then inserting the spigot pipe section into the socket section to carry out the fusion-joining of both, said polyphenylene ether resin composition being a composition which comprises 'a' parts by mass of a polyphenylene ether resin and 'b' parts by mass of a polystyrene resin as the essential components with a and b satisfying the relationships: a + b = 100 and a : b = (10-90) : (90-10) and which exhibits a melt flow rate of 1.0 to 10.0g / 10min after kneading. H=[220 DEG C+{100 DEG C ('a' parts by mass / 100parts by mass)}] +- 10 DEG C.

Description

technical field [0001] The present invention relates to a method for connecting piping members molded using a polyphenylene ether-based resin composition, and a piping member made of a polyphenylene ether-based resin composition connected by the connecting method. Background technique [0002] Polyphenylene ether-based resin compositions have excellent properties such as rigidity, heat resistance, and chemical resistance, so they are used as industrial products for OA equipment, electrical and chemical products, electronic parts, and automotive products (such as hubcaps, fenders, etc.) . [0003] In addition, polyphenylene ether-based resin compositions are resistant to acids and alkalis in high-temperature regions (60 to 95°C) and are relatively inexpensive among commonly used engineering plastics, so they are suitable for transporting high-temperature chemical solutions in the industrial field. high temperature piping components. Such high-temperature piping members tend...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16L47/02C08L25/04C08L71/12
CPCB29C66/116F16L47/06B29C66/1222B29C66/71B29C65/20B29C66/949F16L47/02B29C66/91421B29C66/112B29C66/9592B29C66/12261C08L25/04B29C65/8238B29C66/1122B29C66/5221B29C66/919B29C66/1224B29C66/52292B29C65/8215C08L71/12B29C65/7841B29C66/7315B29K2995/0089C08L2666/06B29K2071/12F16L47/03
Inventor 兴梠英裕甲斐义久
Owner ASAHI YUKIZAI KOGYO CO LTD