CPC B29C 49/22 (2013.01) [B29B 11/08 (2013.01); B29B 11/14 (2013.01); B29C 35/0805 (2013.01); B29C 49/06 (2013.01); B29C 49/4273 (2013.01); B29C 49/6418 (2013.01); B65D 23/02 (2013.01); B65D 83/0055 (2013.01); B29C 45/1684 (2013.01); B29C 2035/0822 (2013.01); B29C 2045/1601 (2013.01); B29C 2949/072 (2022.05); B29C 2949/073 (2022.05); B29C 2949/0773 (2022.05); B29C 2949/0819 (2022.05); B29C 2949/302 (2022.05); B29C 2949/3008 (2022.05); B29C 2949/3012 (2022.05); B29C 2949/3016 (2022.05); B29C 2949/3026 (2022.05); B29C 2949/3032 (2022.05); B29C 2949/3034 (2022.05); B29K 2023/06 (2013.01); B29K 2023/065 (2013.01); B29K 2023/086 (2013.01); B29K 2023/12 (2013.01); B29K 2067/00 (2013.01); B29K 2067/046 (2013.01); B29K 2077/00 (2013.01); B29K 2105/005 (2013.01); B29K 2105/0032 (2013.01); B29K 2105/258 (2013.01); B29L 2031/712 (2013.01); Y10T 428/1352 (2015.01)] | 8 Claims |
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, said preform forms a two layer bag-in-container having a body and neck region upon blow-moulding, said bag-in container comprising a vent connecting the interface to the atmosphere 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, the additive is selected from the group consisting of energy absorbing additives and colorants;
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.
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