Foamed and stretched plastic bottle

• US 10,414,534 B2
• Filed: 01/30/2017
• Issued: 09/17/2019
• Est. Priority Date: 04/23/2012
• Status: Active Grant

• Current Assignee: Toyo Seikan Group Holdings, Ltd.
• Original Assignee: Toyo Seikan Group Holdings, Ltd.
• Inventors: Iino, Hiroki, Ichikawa, Kentarou, Koiso, Nobuhisa, Akuzawa, Norio, Nomura, Tetsuro
• Primary Examiner(s): Perreault, Andrew D
• Application Number:
  US15/419,419
• Publication Number:
  US 20170174383A1
• Time in Patent Office: 960 Days
• CPC Class Codes: B29B 11/08 Injection moulding
• CPC Class Codes: B29B 11/14 characterised by structure or composition
• CPC Class Codes: B29C 2049/023 using inherent heat of the preform, i.e. 1 step blow moulding
• CPC Class Codes: B29C 2949/0715 the preform having one end closed
• CPC Class Codes: B29C 2949/20 Preforms or parisons whereby a specific part is made of only one component, e.g. only one layer
• CPC Class Codes: B29C 49/06 Injection blow-moulding
• CPC Class Codes: B29C 49/071 Preforms or parisons characterised by their configuration, e.g. geometry, dimensions or physical properties
• CPC Class Codes: B29C 49/08 Biaxial stretching during blow-moulding
• CPC Class Codes: B29C 49/12 Stretching rods
• CPC Class Codes: B29C 49/6454 through the preform thickness
• CPC Class Codes: B29K 2067/003 PET, i.e. poylethylene terephthalate
• CPC Class Codes: B29K 2105/04 cellular or porous
• CPC Class Codes: B29K 2105/043 Skinned foam
• CPC Class Codes: B29L 2031/7158 Bottles
• CPC Class Codes: B65D 1/0207 characterised by material, e.g. composition, physical features
• CPC Class Codes: B65D 1/0223 characterised by shape
• CPC Class Codes: B65D 1/40 Details of walls other container details B65D23/00, B65D25/00
• CPC Class Codes: B65D 81/30 by excluding light or other outside radiation wrappers B65D65/16

Abstract

A foamed and stretched plastic bottle having, in the body portion thereof, a foamed region in which foamed cells are distributed, wherein, in at least a portion of the foamed region, the lengths of the foamed cells in the axial direction of the bottle are so distributed as to gradually decrease as the positions of the foamed cells shift from the outer surface side of the body portion toward the central portion thereof and then gradually increase as their positions shift from the central portion thereof toward the inner surface side thereof. The foamed and stretched plastic bottle of the invention exhibits excellent light-shielding property.

Claims

1. A foamed and stretched plastic bottle having a foamed region which is formed in a body portion and in which foamed cells are distributed,

wherein said foamed region contains a portion (β

), and in the portion (β

), lengths of the foamed cells in an axial direction of the bottle are so gradationally distributed such that the foamed cells have a cell length that

is the largest on the inner surface side of the body wall,

gradually decreases toward the outer surface side, and

is the smallest on the outer surface side of the body wall;

wherein a skin layer free of foamed cells is formed on the outer surface side of said portion (β

) of the foamed region; and

wherein total light transmission factor is not more than 20% in said portion (β

) of the foamed region and 20-degree specular gloss (JIS Z8741) on the outer surface of the body portion is not less than 40% in said portion (β

) of the foamed region.