Synthetic resin process and article useful for plating applications
A method for processing reinforcing filler-filled synthetic resins and applications made therefrom wherein the resulting articles have the ability to be plated to form a structurally aesthetic product substantially free of visual defects. The process utilizes an accelerated heat and cool process to form a resin-rich surface that is substantially free of any reinforcing fillers, such as fiber strands and/or bundles, on the external surface of the article. As such, the resulting article is capable of being plated to form an article that is substantially free of visual defects caused by these fillers on the surface of the article.
1. A process for molding an article comprising:
injecting a thermoplastic resin having a reinforcing filler into a mold to contact a mold surface, wherein the mold has a channel for receiving a temperature control fluid;
supplying a heated temperature control fluid to heat the mold surface to a temperature from 1 to 100° C. above the heat deformation temperature of the thermoplastic resin at a rate greater than 120° C. per minute and less than or equal to 500° C. per minute;
molding the thermoplastic resin to form a molded article; and
supplying a cooled temperature control fluid to the mold to cool the molded article;
wherein the molded article is capable of being plated such that at least a portion of the surface of the molded article is substantially free of any reinforcing fillers.
2. The process of claim 1 , wherein the thermoplastic resin is selected from polyacetals, polyacrylics, polycarbonates, polystyrenes, polyesters, polyamides, polyamideimides, polyarylates, polyarylsulfones, polyethersulfones, polyphenylene sulfides, polyvinyl chlorides, polysulfones, polyimides, polyetherimides, polytetrafluoroethylenes, polyetherketones, polyether etherketones, polyether ketone ketones, polybenzoxazoles, polyoxadiazoles, polybenzothiazinophenothiazines, polybenzothiazoles, polypyrazinoquinoxalines, polypyromellitimides, polyquinoxalines, polybenzimidazoles, polyoxindoles, polyoxoisoindolines, polydioxoisoindolines, polytriazines, polypyridazines, polypiperazines, polypyridines, polypiperidines, polytriazoles, polypyrazoles, polypyrrolidines, polycarboranes, polyoxabicyclononanes, polydibenzofurans, polyphthalides, polyacetals, polyanhydrides, polyvinyl ethers, polyvinyl thioethers, polyvinyl alcohols, polyvinyl ketones, polyvinyl halides, polyvinyl nitriles, polyvinyl esters, polysulfonates, polysulfides, polythioesters, polysulfones, polysulfonamides, polyureas, polyphosphazenes, polysilazanes, or a combination including at least one of the foregoing thermoplastic resins.
3. The process of claim 1 , wherein the thermoplastic resin having a reinforcing filler is selected from acrylonitrile-butadiene-styrene (ABS), polycarbonate, polycarbonate/ABS blend, a copolycarbonate-polyester, acrylic-styrene-acrylonitrile (ASA), acrylonitrile-(ethylene-polypropylene diamine modified)-styrene (AES), phenylene ether resins, glass filled blends of polyphenylene oxide and polystyrene, blends of polyphenylene ether/polyamide, blends of polycarbonate/PET/PBT, polybutylene terephthalate and impact modifier, polyamides, phenylene sulfide resins, polyvinyl chloride PVC, high impact polystyrene (HIPS), low/high density polyethylene, polypropylene and thermoplastic olefins (TPO), polyethylene and fiber composites, polypropylene and fiber composites, or a combination thereof.
4. The process of claim 1 , wherein the reinforcing filler is a fiber and the fiber is selected from glass fiber, ceramic fiber, carbon fiber, aramid fiber, or a combination including at least one of the foregoing fibers.
5. The process of claim 1 , wherein the heated temperature control fluid comprises pressurized water.
6. The process of claim 1 , wherein the cooled temperature control fluid comprises pressurized water.
7. A process for molding an article comprising:
injecting a thermoplastic resin having a reinforcing filler into a mold such that the thermoplastic resin contacts a mold surface, wherein the reinforcing filler is present in an amount of about 5 wt % to about 70 wt %, based upon a total weight of the thermoplastic resin with the reinforcing filler, and wherein the mold surface has a temperature greater than a heat deformation temperature of the thermoplastic and wherein the mold is heated at a rate greater than 120° C. per minute and less than or equal to 500° C. per minute, wherein the mold has a channel for receiving a temperature control fluid;
molding the thermoplastic resin to form a molded article; and
supplying a cooled temperature control fluid to the mold to cool the molded article;
wherein the molded article has a gloss rating of greater than or equal to 40, as measured with a 60° gloss meter.
8. The process of claim 1 , wherein conformal cooling is used to supply a cooled temperature control fluid to the mold to cool the molded article.
9. The process of claim 1 , wherein the reinforcing filler is present in an amount of about 10 wt % to about 30 wt %, based upon a total weight of the thermoplastic resin with the reinforcing filler.
10. The process of claim 9 , wherein the reinforcing filler comprises glass fiber.
11. The process of claim 1 , wherein the thermoplastic resin comprises a polycarbonate/ABS blend.
12. The process of claim 1 , wherein the heated temperature control fluid heats the mold surface to a temperature from 30 to 100° C. above the heat deformation temperature of the thermoplastic resin.
13. The process of claim 1 , further comprising chrome plating the molded article.
14. The process of claim 7 , wherein conformal cooling is used to supply a cooled temperature control fluid to the mold to cool the molded article.
15. The process of claim 7 , wherein the reinforcing filler is present in a mount of about 10 wt % to about 30 wt %.
16. The process of claim 15 , wherein the reinforcing filler comprises glass fiber.
17. The process of claim 7 , wherein the thermoplastic resin comprises a polycarbonate/ABS blend.
18. The process of claim 7 , wherein the mold surface has a temperature 60 to 100° C. above the heat deformation temperature of the thermoplastic resin.
19. The process of claim 7 , further comprising chrome plating the molded article.
20. A process for molding an article, comprising:
injecting a thermoplastic resin having a reinforcing filler into a mold to contact a mold surface, wherein the mold has a channel for receiving a temperature control fluid;
supplying a heated temperature control fluid to heat the mold surface to a temperature from 1 to 100° C. above the heat deformation temperature of the thermoplastic resin;
molding the thermoplastic resin to form a molded article; and
supplying a cooled temperature control fluid to the mold to cool the molded article; and
plating the molded article.
21. The process of claim 20 , wherein the plating comprising chrome plating.