Composite preform and method for producing the same, composite container and method for producing the same, and composite container product loaded with beer

Patent metadata

Field	Value
Publication number	US-12157601-B2
Application number	US-202117444403-A
Country	US
Kind code	B2
Filing date	Aug 4, 2021
Priority date	Feb 23, 2017
Publication date	Dec 3, 2024
Grant date	Dec 3, 2024

Abstract

To provide a composite preform that can ensure that worsening of the appearance of a surface of a plastic member caused by near-infrared heating prior to blow molding is effectively prevented and that an inner preform is efficiently heated. The composite preform of the present invention includes a preform and a heat-contractive plastic member, the preform including a mouth part; a trunk part linked to the mouth part; and a bottom part linked to the trunk part, and the heat-contractive plastic member being disposed so as to surround the outside of the preform and including at least a colored layer that contains a resin material and a colorant, wherein the heat-contractive plastic member has a near-infrared transmittance of 50% or higher.

First claim

The invention claimed is:

1. A composite preform comprising:
a preform comprising a mouth part, a trunk part linked to the mouth part, and a bottom part linked to the trunk part; and
a heat-contractive plastic member disposed so as to surround an outside of the preform and comprising at least a colored layer that contains a resin material and a colorant,
wherein the heat-contractive plastic member has a near-infrared transmittance of 50% or higher,
wherein the near-infrared transmittance has a wavelength in a range of 800 nm to 2500 nm,
wherein an inner surface of the heat-contractive plastic member is disposed in close contact with at least the trunk part of the preform, and an outer surface of the heat-contractive plastic member is located on an outermost surface of the composite preform,
wherein the colored layer contains a polyolefin-based resin,
wherein a specific gravity of the heat-contractive plastic member is less than 1,
wherein the heat-contractive plastic member includes a bent part, a first facing surface and a second facing surface, wherein the bent part is formed along a shape of the preform, wherein the first facing surface and the second facing surface each project from the bent part in a direction away from the preform along a central axis direction of the preform, and wherein the first facing surface and the second facing surface are directly thermocompression-bonded, without the preform intervening therebetween, and integrated with each other, and
wherein the colorant is a brown pigment and a content of the colorant is 0.1% to 30% by mass.

2. The composite preform according to claim 1 , wherein the heat-contractive plastic member further comprises a gas barrier layer.

3. The composite preform according to claim 1 , wherein the preform has a multi-layer structure comprising at least a gas barrier layer.

4. The composite preform according to claim 1 , wherein the thermocompression-bonded portion of the heat-contractive plastic member is twisted to form a twisted part.

Assignees

• Dainippon Printing Co Ltd

Inventors

• Suga Yusuke
• Miyawaki Takuma

Classifications

• B29C2049/24302

  Label materials · CPC title

• B29C49/22 Primary

  using multilayered preforms or parisons · CPC title

• B32B1/00

  Layered products having a non-planar shape · CPC title

• B29C2949/3048

  having components being thermoformed · CPC title

• B29C2949/3032

  having components being injected · CPC title