Die-casting metal part-polymer resin composite and method for preparing same
AssigneePlastal SPA
InventorsMu Chang SUNG, Jae Ik KIM, Jae Hwa KIM, Sung Ho HONG
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Abstract
The present invention relates to a metal-polymer resin composite in which a polymer resin is directly injection-molded to a zinc alloy, a magnesium alloy, or a die-casting part thereof, and thus an injection product is directly bonded to a metal surface, wherein in the case of a hard polymer resin, a tensile strength of the metal and the polymer resin is 30 MPa or greater, and in the case of a soft polymer resin, a tensile strength of the metal and the polymer resin is 20 MPa or greater, and an average helium leakage after 10 times of measurement is 10−8 Pa·m3/s or less, and a novel method for preparing the same.
Claims15
A metal-polymer resin composite in which a polymer resin is directly injection-molded to a zinc alloy, a magnesium alloy, or a die-casting part thereof, and thus an injection product is directly bonded to a metal surface, wherein when a main component of the polymer resin is a soft polymer resin or a crystalline polymer resin such as polyethylene (PE), polypropylene (PP), and liquid crystal polymer (LCP), a tensile strength of the metal and the polymer resin is 20 MPa or greater, and when a main component of the polymer resin is a hard polymer resin such as polycarbonate (PC), polybutylene terephthalate (PBT), polyphenylene sulfide (PPS), polyphthalamide (PPA), polyamide (PA), polyamide 6 (PA6), and polyamide 66 (PA66), a tensile strength of the metal and the polymer resin is 30 MPa or greater.
A method for preparing a metal-polymer resin composite by bonding a metal member such as a zinc alloy, a magnesium alloy, or a die-casting part thereof to a polymer resin through a degreasing process, an etching process, an electrolysis process, and an injection process,
- wherein the metal member is subjected to etching, desmutting, and ultrasonic cleaning, and
- the electrolysis process is performed in an electrolyte containing at least one of (1) hydroxide of an alkali metal or an alkaline earth metal, (2) a phosphate compound or a sulfate compound, and (3) a silicate compound.
Dependencies are inferred from the claim text.