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Composite of metal and resin and method for manufacturing the same

a technology of resin and composite materials, applied in the field of composite materials of metal parts, to achieve the effect of good productivity, good productivity of parts and casings

Inactive Publication Date: 2010-12-02
TAISEI PLAS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0057]Applying the present invention in various fields affords better joinability, higher efficiency, an expanded range of application and so forth and makes possible the rationalization of manufacturing and the enhancement of corrosion resistance in the cases of electronic equipments and consumer electrical equipments. As a result, the present invention can contribute to better productivity and performance for casings and parts used in mobile electronic equipments, mounted electrical and electronic equipments, marine-use electrical and electronic equipments and in many other industrial fields.
[0058]As explained in detail above, with the composite according to the present invention, a resin composition part and a titanium alloy part are integrated so that they may not readily come apart. A thermoplastic resin composition having a resin component containing PBT by 70 to 97 wt % and PET and / or polyolefin resin by 3 to 30 wt % or a thermoplastic resin composition having a resin component containing PPS by 70 to 97 wt % and polyolefin resin by 3 to 30 wt % can be securely joined by injection joining to a titanium alloy substrate that has undergone a specific surface treatment and, as a result, a composite can be manufactured in which a resin and a titanium alloy are integrated. Moreover, the method for manufacturing the composite is based on the joining technology to which the injection molding technology with good productivity is applied and the productivity of parts and casings in which titanium alloys are used can be improved with this method.

Problems solved by technology

However, although the joining principle in Patent Document 1 by the inventors does exhibit an extremely good effect with aluminum alloys or the like, it has not effect in injection joining to other metals besides aluminum alloys.
However, since countless microcrystals are simultaneously generated, the viscosity of the resin flow rises abruptly at the distal end of the injected resin and at places in contact with the mold metal faces.

Method used

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  • Composite of metal and resin and method for manufacturing the same
  • Composite of metal and resin and method for manufacturing the same
  • Composite of metal and resin and method for manufacturing the same

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

PPS Composition Preparation Example

[0111]6214 g of Na2S.2.9H2O and 17,000 g of N-methyl-2-pyrrolidone were supplied to a 50 liter autoclave equipped with a stirrer. The temperature was gradually raised to 205° C. while stirring the system under a nitrogen gas flow and 1355 g of water was distilled off. This system was cooled to 140° C., after which 7160 g of p-dichlorobenzene and 5000 g of N-methyl-2-pyrrolidone were added and the system was sealed under a nitrogen gas flow. The temperature of the system was raised to 225° C. over 2 hours, the system was polymerized for 2 hours at 225° C., then the temperature was raised to 250° C. over 30 minutes and polymerization was conducted for another 3 hours at 250° C. Upon completion of the polymerization, the system was cooled to room temperature and the polymer was separated in a centrifuge. The solids of the polymer were repeatedly washed with warm water and dried over night at 100° C., which gave PPS with a melt viscosity of 280 poise (...

preparation example 2

Preparation of PPS Composition

[0113]The PPS (1) obtained in Preparation Example 1 was cured for 3 hours at 250° C. under an oxygen atmosphere, which gave PPS (hereinafter referred to as PPS (3)). The resulting PPS (3) had a melt viscosity of 1800 poise. 5.98 kg of the resulting PPS (3) and 0.02 kg of polyethylene (Nipolon Hard 8300A, made by Tosoh) were uniformly mixed preliminarily in a tumbler. After this, glass fiber with an average fiber diameter of 9 μm and a fiber length of 3 mm (RES03-TP91) was supplied by side feeder so that the added amount would be 40 wt % while these were melt-kneaded in a biaxial extruder (TEM-35B) at a cylinder temperature of 300° C., which gave a pelletized PPS composition (2). The resulting PPS composition (2) was dried for 5 hours at 175° C.

preparation example 3

Preparation of PPS Composition

[0114]7.2 kg of the PPS (2) obtained in Preparation Example 1 and 0.8 kg of glycidyl methacrylate-ethylene copolymer (Bondfast E, made by Sumitomo Chemical) were uniformly mixed preliminarily in a tumbler. After this, glass fiber with an average fiber diameter of 9 μm and a fiber length of 3 mm (RES03-TP91) was supplied by side feeder so that the added amount would be 20 wt % while these were melt-kneaded in a biaxial extruder (TEM-35B) at a cylinder temperature of 300° C., which gave a pelletized PPS composition (3). The resulting PPS composition (3) was dried for 5 hours at 175° C.

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Abstract

It is an object of the present invention to securely and integrally join a metal and a resin, more particularly, a shaped titanium alloy substrate and a resin composition. A titanium alloy substrate is used that has undergone surface roughening by chemical etching or the like so as to have a ultrafine textured face in which bent, ridge-like protrusions having a width and height of from ten to a few hundred nanometers and a length of from a few to a few hundred microns rise up on the surface at a spacing period of from ten to a few hundred nanometers. A titanium alloy piece 1 with its surface treated is inserted into the cavity of a metallic mold for injection molding 10 and a specific resin composition 4 is injected to obtain an integrated composite 7. The main resin component of the resin composition 4 that is used can be a polyphenylene sulfide resin (PPS) or a polybutylene terephthalate resin (PBT). High injection joining strength is obtained if the resin composition contains, as an auxiliary component, a polyethylene terephthalate resin and / or polyolefin resin in the case of PBT and a polyolefin resin in the case of PPS.

Description

FIELD OF THE INVENTION[0001]The present invention relates to a composite of a metal part, particularly one made of a titanium alloy, and a resin molded article, which is used for housings of electronic equipments, housings of consumer electrical equipments, mechanical parts and so forth and to a method for manufacturing this composite. More particularly, the present invention relates to a composite, in which a thermoplastic resin composition is integrated with a titanium alloy part made by mechanical working, and to a method for manufacturing this composite and also relates to a composite of metal and resin, which is favorable for use in various mobile electronic equipments, consumer electrical products, medical instruments, automotive structural parts, automotive mounted equipments, other electrical parts and in corrosion resistant exterior trim parts or the like and to a method for manufacturing the composite.BACKGROUND OF THE INVENTION[0002]Technology for integrating metals and r...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): B32B15/085B32B15/08B29C45/14
CPCB29K2705/00B29K2705/08C23F1/26B29C45/14311B29C2045/14868B29K2067/006B29K2705/02B29C45/14008B29C70/683B29C45/14221B29C2045/14245Y10T428/24355B29K2081/04B29C45/14B29K2023/00B29K2105/16
Inventor NARITOMI, MASANORIANDOH, NAOKI
Owner TAISEI PLAS CO LTD
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