Plastic container having excellent decorative appearance

Patent metadata

Field	Value
Publication number	US-9744749-B2
Application number	US-201314391140-A
Country	US
Kind code	B2
Filing date	Feb 19, 2013
Priority date	Apr 10, 2012
Publication date	Aug 29, 2017
Grant date	Aug 29, 2017

Abstract

A plastic container including a container body ( 1 ) made from a colored olefin resin and a decorative layer ( 3 ) laminated on the outer surface thereof. The decorative layer includes a transparent adhesive resin layer ( 3 b ), a transparent polyester resin layer ( 3 a ) which is the outer surface layer, and an intermediate gradation layer ( 3 c ) including a portion of which the thickness gradually varies in the direction of height of the container. The gradation layer is formed of a transparent polyester resin blended with a coloring agent. The thickness of the container body varies in response to a change in the thickness of the gradation layer in a manner such that the thickness of the container body portion which is the total thickness of the thickness of the container body and the thickness of the decorative layer is not varied by the presence of the gradation layer.

First claim

The invention claimed is:

1. A plastic container comprising a container body made from an olefin resin and is colored and a decorative layer laminated on the outer surface of the container body, wherein
said decorative layer includes a transparent adhesive resin layer positioned on the inner surface side of the container, a transparent polyester resin layer which is the outer surface layer positioned on the outer surface side of the container, and a gradation layer which is formed between the transparent adhesive resin layer and the transparent polyester resin layer and includes a portion of which the thickness gradually varies in the direction of height of the container, said gradation layer being formed of a resin composition of a transparent polyester resin blended with a coloring agent;
the thickness of the container body in said container body portion varying in response to a change in the thickness of said gradation layer in a manner that the thickness of the container body portion which is the total thickness of the thickness of said container body and the thickness of said decorative layer is not varied by the presence of said gradation layer; and
the water content of the transparent polyester resin forming the gradation layer is smaller than the water content of the transparent polyester resin forming the outer surface layer, the water content of the transparent polyester resin forming the outer surface layer is in a range of 500 to 1500 ppm, and the water content of the transparent polyester resin forming the gradation layer is in a range of 50 to 500 ppm.

2. The plastic container according to claim 1 , wherein said container body includes an uncolored or colored layer of a virgin olefin resin, and a colored reproduced layer formed by using scraps that generates at the time of forming the containers being blended with an olefin resin and a coloring agent, the thickness of said colored reproduced layer varying responsive to a change in the thickness of the gradation layer.

3. The plastic container according to claim 1 , wherein the plastic container is a bottle obtained by the direct blow-forming.

Assignees

• Toyo Seikan Group Holdings Ltd

Inventors

• Katou Yuuichirou
• Tanaka Kenjiro
• Tanaka Masayoshi

Classifications

• B29C49/0411

  Means for defining the wall or layer thickness · CPC title

• B29C49/22

  using multilayered preforms or parisons · CPC title

• B29C47/0023

  Operations & Transport · mapped topic

• B29C2049/228

  Operations & Transport · mapped topic

• B32B2272/00

  Resin or rubber layer comprising scrap, waste or recycling material · CPC title