Integrally blow-moulded bag-in-container comprising an inner layer ad an outer layer comprising energy absorbing additives, preform for making it and process for producing it

Patent metadata

Field	Value
Publication number	US-10668659-B2
Application number	US-201715419098-A
Country	US
Kind code	B2
Filing date	Jan 30, 2017
Priority date	Apr 19, 2007
Publication date	Jun 2, 2020
Grant date	Jun 2, 2020

Abstract

The present invention relates to an integrally blow-moulded bag-in-container ( 2 ) and preform ( 1, 1 ′) for blow-moulding the bag-in-container. An inner layer ( 11 ) and an outer layer ( 12 ) are used, wherein the preform forms a two-layer container upon blow-moulding, and wherein the obtained inner layer of the container releases from the thus obtained outer layer upon introduction of a gas at a point of interface ( 14 ) between the two layers. At least one of the inner and outer layers includes at least one additive allowing both inner and outer layers to reach their respective blow-moulding temperatures substantially simultaneously.

First claim

We claim:

1. A process for producing a bag-in-container comprising the following steps:
providing a polymer preform having:
an inner layer and an outer layer, wherein each of said inner layer and said outer layer consists of a single layer comprising PET, wherein said preform forms a two layer bag-in-container having a body and neck region upon blow-moulding, and wherein the obtained inner layer of said bag-in-container releases from the obtained outer layer upon introduction of a pressurized gas at a point of interface between said two layers in the neck region of the bag-in-container; and
at least one of said inner and outer layers includes an additive;

heating said preform to blow-moulding temperature in a single oven; and
blow-moulding the heated preform to form the bag-in-container,

wherein a type and an amount of the additive in the at least one of the inner and outer layers of said preform are such that said two layers reach their respective blow-moulding temperatures simultaneously.

2. The process according to claim 1 , wherein the additive is selected from the group consisting of; energy absorbing additives and colorants.

3. The process according to claim 2 , wherein the energy absorbing additive is selected from the group consisting of; carbon black, graphite, diamond dust, diazonium salts, sulphonium salts, sulfoxonium salts, and iodonium salts.

4. The process according to claim 1 , wherein the inner layer or the outer layer further comprises at least one selected from the group consisting of: polyethylene naphthalate (PEN), polytrimethylene terephthalate (PTT), polyamide (PA), polypropylene (PP), polyethylene (PE), high density polyethylene (HDPE), ethylene vinyl alcohol (EVOH), polyglycolic acid (PGAc), polylactic acid (PLA), and copolymers or blends thereof.

5. The process according to claim 1 , wherein the oven comprises infrared lamps.

6. The method of claim 1 , said bag-in container comprising a vent connecting the interface to the atmosphere.

7. The method of claim 6 , further comprising filling the inner bag with a liquid.

8. The method of claim 7 , wherein the liquid is a beverage.

9. The method of claim 7 , further comprising releasably attaching a source of pressurized gas to the vent.

10. The method of claim 9 , further comprising injecting a pressurized gas from the source of pressurized gas through the vent and into the interface of the bag-in-container to collapse the inner bag and dispense the liquid contained therein.

Assignees

• Anheuser Busch Inbev Sa

Inventors

• Van Hove Sarah
• Peirsman Daniel
• Verpoorten Rudi

Classifications

• B29B2911/14093

  Operations & Transport · mapped topic

• B29C49/22 Primary

  using multilayered preforms or parisons · CPC title

• B29C35/0805

  using electromagnetic radiation · CPC title

• B29B2911/14066

  Operations & Transport · mapped topic

• B29B2911/1408

  Operations & Transport · mapped topic