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Co-injection method, preform, and container

A co-injection, event-triggered technology for plastic preforms and containers

Inactive Publication Date: 2016-03-09
PLASTIPAK PACKAGING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Furthermore, as mentioned, there may be particular challenges in providing such articles composed of certain polymers (e.g., PET)

Method used

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  • Co-injection method, preform, and container
  • Co-injection method, preform, and container
  • Co-injection method, preform, and container

Examples

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Embodiment Construction

[0016] Reference will now be made in further detail to embodiments of the invention, examples of which are described herein and illustrated in the accompanying drawings. While the invention will be described in conjunction with the embodiments, it will be understood that they are not intended to limit the invention to these embodiments. On the contrary, the invention is intended to cover alternatives, modifications and equivalents, which may be included within the spirit and scope of the concepts disclosed herein.

[0017] The present invention includes embodiments that may be directed to preforms and / or containers suitable for products such as milk and beer. If desired, such preforms and / or containers may contain one or more barrier layers extending different vertical lengths relative to such articles. For example and without limitation, such barrier layers may be constructed of various known barrier materials used with bottles and containers.

[0018] As noted previously, ...

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PUM

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Abstract

A method of forming a multi-layer, co-injection molded article is disclosed. In an embodiment inner, middle, and outer layers of a polymer material are co-injected, and the velocity of the co-injection of the inner, middle, and outer layers are controlled. In embodiments of the method, the velocity of the co-injecting is less than about 0.390 inch / second. With embodiments, the articles may be formed from polyethylene terephthalate (PET). Articles, such as preforms, that are formed from a co-injection process, in which velocity is controlled, are also disclosed.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of US Provisional Application No. 61 / 845,730, filed July 12, 2013, the entire disclosure of which is incorporated herein by reference. technical field [0003] The present invention generally relates to plastic preforms and containers formed using co-injection molding apparatus, systems and methods. Background technique [0004] Conventional co-injection molding equipment and systems can be configured to provide multiple sequential or simultaneous flows of moldable plastic material to a mold cavity to manufacture multilayer co-injected articles. Some known systems, such as those disclosed in relation to US Patent Application No. 13 / 238,074, provide co-injection injection molding systems with hot runners to control the flow of multiple molten fluids through the mold gates and into the mold cavities. However, such conventional coinjection systems can be primarily pressure-based, whic...

Claims

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Application Information

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IPC IPC(8): B29C45/16B29C45/64B29C45/77
CPCB29C45/77B29C45/1642B29C2945/76595B29C45/1607B29C45/1643B29C2045/2872B29C2945/76745B29C2945/76859B29B11/08B29C45/1646B29K2067/003B29K2995/0097B29L2009/00
Inventor T·J·辛普森
Owner PLASTIPAK PACKAGING