Claims
- 1. A method of treating the surface of a shaped body, comprising the steps of:
- providing a shaped body formed of a composition containing (A) 5-95% by weight of a propylene-ethylene block copolymer which contains 3-15% by weight of ethylene, which has a melt per 10 minutes and which includes a polypropylene block and an ethylene-propylene copolymer block having an ethylene content of 30-60% by weight and showing an intrinsic viscosity of 3-10 dl/g in a tetralin solution at 135.degree. C. and (B) 5-95% by weight of an ethylene-propylene copolymer rubber which contains 40-80% by weight of ethylene and which has a Mooney viscosity, ML.sub.1+4 100.degree. C., of 20-60;
- contacting a surface of the shaped body with a UV-ray absorbing liquid at a temperature and for a period of time sufficient to produce a swollen surface containing said UV-ray absorbing liquid; and
- irradiating said swollen surface with UV rays having wavelengths of 300 nm or less thereby increasing the surface energy of said surface of the shaped body.
- 2. A method as claimed in claim 1, wherein said composition further includes (C) 5-40% by weight of a filler and wherein the contents of the propylene-ethylene block copolymer (A) and the ethylene-propylene copolymer rubber (B) are 30-90% by weight and 5-30% by weight, respectively.
- 3. A method as claimed in claim 2, wherein said filler is talc and/or mica with a particle size of 0.1-10 .mu.m.
- 4. A method as claimed in claim 1, further comprising coating said UV-irradiated surface with an urethane coating material.
- 5. A method as claimed in claim 1, wherein said contacting step includes heating said surface to a temperature of 30.degree. C. or more and then contacting said heated surface with the UV ray-absorbing liquid maintained at a temperature lower by 10.degree.-80.degree. C. than that of said heated surface.
- 6. A method as claimed in claim 1, wherein said contacting is performed for 5-600 seconds and said irradiation is performed for 20-600 seconds.
- 7. A method as claimed in claim 1, wherein said contacting step is performed at a temperature in the range from 30.degree. C. to the boiling point of said UV-absorbing liquid.
- 8. A method as claimed in claim 1, wherein said contacting step is performed at a temperature in the range from 50.degree. C. to a temperature lower by 5.degree. C. than the boiling point of said UV-absorbing liquid.
- 9. A method as claimed in claim 1, wherein said UV-absorbing liquid is a chlorinated aliphatic hydrocarbon.
Priority Claims (1)
Number |
Date |
Country |
Kind |
62-234406 |
Sep 1987 |
JPX |
|
CROSS-REFERENCE TO RELATED APPLICATION
This application is a continuation-in-part of U.S. Ser. No. 07/243,272 filed Sept. 12, 1988, now abandoned.
US Referenced Citations (5)
Continuation in Parts (1)
|
Number |
Date |
Country |
Parent |
243272 |
Sep 1988 |
|