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Bonded body of galvanized steel sheet and adherend, and manufacturing method thereof

a technology of galvanized steel and bonded body, which is applied in the direction of metal layered products, metallic material coating processes, synthetic resin layered products, etc., can solve the problems of ultra-fine irregularities on aluminum alloy surfaces, no strong bonding techniques have been proposed for galvanized steel sheets and resin molded articles, and no strong bonding techniques have been proposed for galvanized steel sheets and metal alloys or frp by way of adhesives

Inactive Publication Date: 2011-01-13
TAISEI PLAS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0012]In the light of this technical background, it is an object of the present invention to provide a technique for strongly integrating a galvanized steel sheet and an adherend. Specifically, it is an object of the present invention to strongly integrate a galvanized steel sheet and a resin molded article through injection bonding of a galvanized steel sheet and a thermoplastic resin composition. It is another object of the present invention to integrate a galvanized steel sheet and a molded article of a thermoplastic resin composition through press-fusion bonding of the foregoing. Yet another object of the present invention is to afford strong bonding between a galvanized steel sheet and a metal alloy or FRP by way of an adhesive.

Problems solved by technology

The above immersion results in the formation of ultra-fine irregularities on the aluminum alloy surface, and at the same time, in adsorption of amine compound molecules onto the surface of the aluminum alloy.
No techniques have been proposed for strongly joining galvanized steel sheets and resin molded articles by way of adhesives or through press-fusion bonding.
Likewise, no techniques have been proposed for strongly bonding galvanized steel sheets and metal alloys or FRP by way of adhesives.

Method used

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  • Bonded body of galvanized steel sheet and adherend, and manufacturing method thereof
  • Bonded body of galvanized steel sheet and adherend, and manufacturing method thereof
  • Bonded body of galvanized steel sheet and adherend, and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

example 1

Preparative Example 1

Preparation of PPS Composition (1)

[0154]A 50 L autoclave equipped with a stirrer was charged with 6214 g of a sodium sulfide (nonahydrate) Na2S.9H2O and 17000 g of N-methyl-2-pyrrolidone. The temperature was gradually raised to 205° C. under stirring and under a nitrogen gas stream, and 1355 g of water were distilled off. The system was cooled to 140° C., after which 7160 g of p-dichlorobenzene and 5000 g of N-methyl-2-pyrrolidone were added. The system was sealed under a nitrogen gas stream. The temperature of the system was raised to 225° C. over 2 hours, whereupon polymerization proceeded for 2 hours at 225° C. Thereafter, the temperature of the system was raised to 250° C. over 30 minutes, whereupon polymerization proceeded for another 3 hours at 250° C. Once polymerization was over, the system was cooled to room temperature and the resulting polymer was separated in a centrifugal separator. The solid fraction of the polymer was repeatedly washed with warm w...

example 2

Preparative Example 2

Preparation of PPS Composition (2)

[0157]The PPS (1) obtained in Preparative example 1 was cured for 3 hours at 250° C. in an oxygen atmosphere to yield a PPS (3). The melt viscosity of the obtained PPS (3) was 1800 poise.

[0158]Next, 5.98 kg of the resulting PPS (3) and 0.02 kg of polyethylene “Nipolon Hard 8300A (by Tosoh)” were mixed uniformly beforehand in a tumbler. Thereafter, melt kneading was carried out in a biaxial extruder “TEM-35B” at a cylinder temperature of 300° C., under supply of glass fibers having an average fiber diameter of 9 μm and a fiber length of 3 mm “RES03-TP91” through a side feeder, to an addition amount of 40 wt %. A pelletized PPS composition (2) was obtained as a result. The obtained PPS composition (2) was dried for 5 hours at 175° C.

example 3

Preparative Example 3

Preparation of PPS Composition (3)

[0159]Herein, 7.2 kg of the PPS (2) obtained in Preparative example 1 and 0.8 kg of a glycidyl methacrylate-ethylene copolymer “Bondfast E (by Sumitomo Chemical)” were mixed uniformly beforehand in a tumbler. Thereafter, melt kneading was carried out in a biaxial extruder “TEM-35B” at a cylinder temperature of 300° C., under supply of glass fibers having an average fiber diameter of 9 μm and a fiber length of 3 mm “RES03-TP91” through a side feeder, to an addition amount of 20 wt %. A pelletized PPS composition (3) was obtained as a result. The obtained PPS composition (3) was dried for 5 hours at 175° C.

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Abstract

The invention is a technique for strongly integrating a galvanized steel sheet and a resin molded article. A hot-dip galvanized steel sheet “Z18” is immersed in an aqueous solution for aluminum degreasing at 75° C. for 7 minutes, to form roughness having an RSm of 0.8 to 2.3 μm and an Rz of 0.3 to 1.0 μm on the surface. The surface is covered with convex protrusions having a diameter of about 100 nm, and a chromate treatment layer appears in the surface. In other words, three conditions suitable for bonding are satisfied thereby. A resin composition comprising 70 to 97 wt % of polyphenylene sulfide and 3 to 30 wt % of a polyolefin resin is injected onto the surface. The resin composition penetrates into ultra-fine irregularities and is cured in that state, whereby a composite in which the galvanized steel sheet and the resin molded article are strongly integrated is obtained. The shear rupture strength of the composite is extremely high, in excess of 20 MPa.

Description

TECHNICAL FIELD[0001]The present invention relates to a bonded body of an adherend and a galvanized steel sheet having high corrosion resistance and used in, for instance, construction materials, outdoor equipment, construction machinery parts and ordinary machinery parts, and to a method for manufacturing the bonded body. More particularly, the present invention relates to a composite in which a galvanized steel sheet and a resin composition are integrated through injection of the resin composition into the galvanized steel sheet, to a bonded body in which a galvanized steel sheet and a metal alloy are bonded together by way of an adhesive, to a composite in which a galvanized steel sheet and a resin molded article are bonded by way of an adhesive, to a composite in which a galvanized steel sheet and a fiber-reinforced plastic (hereafter “FRP”) are bonded by way of an adhesive, and to a method for manufacturing each of the foregoing.BACKGROUND ART[0002]Technologies for integrating ...

Claims

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Application Information

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IPC IPC(8): B32B15/08C23F1/00B32B37/14B32B38/00
CPCB29C45/0001Y10T428/12472B29C45/14778B29C65/48B29C66/0042B29C66/1122B29C66/30325B29C66/43B29C66/721B29C66/74283B29C66/8122B29K2067/006B29K2077/10B29K2081/04B29K2101/12B29K2105/06B29K2305/00B29K2305/12B29K2307/00B29K2705/00B32B15/08B32B15/18B32B27/28B32B27/34B32B27/36C23C2/26B29C45/14311B29C65/485B29C65/4835B29C65/483B29C2045/14868B32B37/12B32B37/182B32B2037/1269C23F1/00B29C66/026B29C66/964B29C65/00B29K2827/18B29C66/7212B29K2995/0072B29C66/71B29C66/7392B29C66/73111B29C66/8322B29C66/73775B29C66/73115B29C66/73151B29C66/81821B29C65/44B29C66/02245B32B5/147B32B7/12B32B15/043B32B27/20B32B27/286B32B27/32B32B3/26B32B2255/06B32B2255/26B32B2262/101B32B2262/106B32B2270/00B32B2307/536B32B2307/538B32B2307/542B32B2419/00B29C66/0344B29C66/8248B29C65/8253B29C66/73161C23C22/22C23C22/33C23C22/362B29C66/474B29K2307/04B29K2077/00B29K2309/08B29K2277/10B29K2067/003B29K2023/00B29C45/14008B29C66/7483B05D7/51C23C22/00C23C22/06C23C22/07C23C22/12C23C22/30C23C22/365C23C22/50C23C22/53C23C22/56
Inventor NARITOMI, MASANORIANDOH, NAOKI
Owner TAISEI PLAS CO LTD
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