US Patent No: 6,352,426
Number of patents in Portfolio can not be more than 2000
Mold for injection molding multilayer preforms
Stats
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Mar 5, 2002
Issued date -
Apr 21, 1999
filing date -
09/296,695
serial no -
In Force
status
Importance
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Abstract
This invention relates to methods and apparatus for making articles made of polyester, preferably polyethylene terephthalate (PET), having coated directly to at least one of the surfaces thereof one or more layers of thermoplastic material with good gas-barrier characteristics. In one preferred method and apparatus, preforms are injection molded, barrier-coated immediately thereafter, and remain on a mold portion for a time to speed cooling of the completed preform. Preferably the barrier-coated articles take the form of preforms coated by at least one layer of barrier material and the containers are blow-molded therefrom. Such barrier-coated containers are preferably of the type to hold beverages such as soft drinks, beer or juice. The preferred barrier materials have a lower permeability to oxygen and carbon dioxide than PET as well as key physical properties similar to PET. The materials and methods provide that the barrier layers have good adherence to PET, even during and after the blow molding process to form containers from preforms. Preferred barrier coating materials include poly(hydroxyamino ethers).
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First Claim
Related Publications
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International Classification(s)
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Cited Art
| Patent Info | (Count) | # Cites | Year |
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| 4,438,254 Process for producing epoxy resins | 54 | 1983 | |
| 4,647,648 Polyhydroxyethers from hydroxybiphenyls | 33 | 1985 | |
| 5,115,075 Amide and hydroxymethyl functionalized polyethers as thermoplastic barrier resins | 33 | 1990 | |
| 5,094,793 Methods and apparatus for generating interfacial surfaces | 130 | 1990 | |
| 5,202,074 Method for producing injection molded multilayer articles | 89 | 1991 | |
| 5,134,218 Hydroxy-functional poly(amide ethers) as thermoplastic barrier resins | 27 | 1991 | |
| 5,143,998 Hydroxy-functional poly(amide ethers) as thermoplastic barrier resins | 27 | 1991 | |
| 5,275,853 Hydroxyl functionalized polyetheramines as barrier packaging for oxygen-sensitive materials | 63 | 1992 | |
| 5,540,878 Method for producing blow molded multilayer plastic articles | 18 | 1994 | |
| 5,628,950 Method and apparatus for producing multilayer plastic articles | 47 | 1994 | |
| 5,731,094 Hydroxy-phenoxyether polyester coextruded laminates | 19 | 1996 | |
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| 5,443,766 Method of making multi-layer preform used for plastic blow molding | 42 | 1993 | |
| 5,464,106 Multi-layer containers | 49 | 1994 | |
| 5,688,572 Multi-layer containers | 19 | 1995 | |
| 5,651,933 Method for making multi-layer preform used for plastic blow molding | 20 | 1995 | |
| 5,804,305 Multi-layer preform used for plastic blow molding | 26 | 1995 | |
| 5,645,183 Multi-layer containers | 20 | 1995 | |
| 5,906,285 Plastic blow molded container | 20 | 1996 | |
| 5,772,056 Plastic blow molded container | 26 | 1996 | |
| 5,927,525 Multi-layer containers and preforms | 22 | 1997 | |
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| 4,755,404 Refillable polyester beverage bottle and preform for forming same | 85 | 1987 | |
| 5,509,965 Preform coating apparatus and method | 44 | 1993 | |
| 5,628,957 Method of forming multilayer container with polyethylene naphthalalte (pen) | 41 | 1994 | |
| 5,582,788 Method of cooling multilayer preforms | 48 | 1994 | |
| 5,759,656 Method of forming multilayer preform and container with low crystallizing interior layer | 23 | 1997 | |
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| 5,300,541 Polyamine-polyepoxide gas barrier coatings | 31 | 1991 | |
| 5,652,034 Barrier properties for polymeric containers | 43 | 1991 | |
| 5,489,455 Container with polyamine-polyepoxide gas barrier coating | 41 | 1993 | |
| 5,491,204 Gas barrier coating from reacting polyamine, alkanolamine and polyepoxide | 25 | 1995 | |
| 5,728,439 Multilayer packaging material for oxygen sensitive food and beverage | 33 | 1996 | |
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| 4,646,925 Multi-layer preform for draw-blow forming a bottle | 76 | 1984 | |
| 4,741,936 Laminate preform for a multi-layer polyester bottle | 58 | 1986 | |
| 5,085,821 Preparation of multi-layer drawn polyester bottles | 25 | 1988 | |
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| 4,515,836 Process for coating substrates with aqueous polymer dispersions | 58 | 1983 | |
| 4,538,542 System for spray coating substrates | 57 | 1984 | |
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| 4,578,295 High barrier polymer blend and articles prepared therefrom | 99 | 1984 | |
| 4,715,504 Oriented plastic container | 45 | 1986 | |
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| 5,472,753 Polyethylene terephthalate-containing laminate | 27 | 1994 | |
| 5,759,654 Multiple layer preform | 26 | 1995 | |
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| 4,830,811 Process for molding double-layered preforms in an injection, stretching and blow molding machine | 27 | 1987 | |
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| 4,540,543 Injection blow molding process and apparatus | 24 | 1984 | |
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| 4,604,258 Stack-mold for injection blow molding | 26 | 1984 | |
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| 5,688,570 Method and apparatus for forming a multi-layer preform | 25 | 1995 | |
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| RE34537 Plastic composite barrier structures | 26 | 1992 | |
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| 4,560,741 Polyester resins capable of forming containers having improved gas barrier properties | 35 | 1985 | |
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| 4,564,541 Plastic laminate structure and vessel | 41 | 1984 | |
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| 5,914,138 Apparatus for throttle-valving control for the co-extrusion of plastic materials as interior core streams encased by outer and inner streams for molding and the like | 29 | 1996 | |
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| 5,188,787 Process for the injection moulding of multi-layered articles | 52 | 1992 | |
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| 5,599,494 Method of forming a parison having multiple resin layers | 20 | 1994 | |
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| 4,867,664 Extrusion molding equipment for multi-layer parison | 30 | 1988 | |
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| 4,940,616 Multilayered container and method for making | 22 | 1988 | |
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| 4,480,082 Epoxy resin fortifiers based on aromatic amides | 44 | 1983 | |
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| 4,587,073 Method of manufacture of a multilayer container of plastic material | 22 | 1984 | |
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| 5,354,532 Methods for molding composite polyester articles having rigid and flexible regions | 32 | 1991 | |
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| 4,937,130 Polycarbonate container having internal layers of amorphous polyamide | 22 | 1989 | |
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| 5,551,858 Apparatus for forming synthetic resins | 20 | 1994 | |
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| 4,403,090 Polyisophthalates and copolymers thereof having high barrier properties | 43 | 1982 | |
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| 4,956,143 Method and apparatus for the multi-unit production of thin-walled tubular products utilizing an injection molding technique | 25 | 1988 | |
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| 5,443,378 Apparatus for the sandwich method of injection molding | 31 | 1994 | |
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| 5,508,076 Layered preform | 25 | 1994 | |
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| 4,980,211 Article of polyethylene terephthalate resin | 68 | 1980 | |
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| 4,375,947 Injection molding system | 19 | 1982 | |
| 4,376,090 Injection molding system | 30 | 1982 | |
Patent Citation Ranking
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Sep 5, 2013 |
| Fee | Large entity fee | small entity fee | micro entity fee |
|---|---|---|---|
| Surcharge - 11.5 year - Late payment within 6 months | $160.00 | $80.00 | $40.00 |
| Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
| Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |