|국가/구분||United States(US) Patent 등록|
|국제특허분류(IPC7판)||B32B-001/08 B32B-027/08 B32B-027/36|
|미국특허분류(USC)||428/036.7 ; 428/036.6 ; 428/036.91 ; 428/480 ; 428/542.8 ; 428/903.3|
|발명자 / 주소|
|출원인 / 주소|
|대리인 / 주소||
|인용정보||피인용 횟수 : 40 인용 특허 : 59|
A multi-layer preform used for plastic blow molding and a method for making the preform provides an inner layer of polyethylene naphthalate and an injection molded outer layer of homopolymeric polyethylene terephthalate which has reduced transmission of gas upon blow molding as a container due to the gas barrier provided by the inner layer of polyethylene naphthalate. The inner layer of homopolymeric polyethylene naphthalate by itself or along with a further inner layer of virgin polyethylene terephthalate is thermoformed prior to the injection molding o...
[ What is claimed is:] [1.] A multi-layer preform used for plastic blow molding, comprising:an inner layer consisting essentially of homopolymeric polyethlene naphthalate for providing a gas barrier; andan injection molded outer layer of polyethlene terephthalate which defines an outer surface of the preform and, upon blow molding of the preform into a container, gas being transmitted through the container to an extent limited by the gas barrier provided by the inner layer of polyethylene naphthalate.