CPC B65D 25/16 (2013.01) [B29C 45/1684 (2013.01); B29C 49/071 (2022.05); B29C 49/22 (2013.01); B65D 23/02 (2013.01); B65D 33/01 (2013.01); B65D 83/0055 (2013.01); B29C 49/06 (2013.01); B29C 2049/222 (2013.01); B29C 2949/08 (2022.05); B29C 2949/302 (2022.05); B29C 2949/3008 (2022.05); B29C 2949/3012 (2022.05); B29C 2949/3016 (2022.05); B29C 2949/3032 (2022.05); B29K 2101/12 (2013.01); B29K 2105/258 (2013.01); B29L 2009/00 (2013.01); B29L 2009/001 (2013.01); B29L 2031/712 (2013.01); B29L 2031/7158 (2013.01); Y02W 90/10 (2015.05)] | 5 Claims |
1. A method for producing a bag-in-container having
an inner layer forming the bag and an outer layer forming the container, and a mouth fluidly connecting the volume defined by the bag to the atmosphere, said container having at least one interface vent fluidly connecting the interface between inner and outer layers to the atmosphere,
said at least one vent runs parallel to the interface between inner and outer layers and opens to the atmosphere at a location adjacent to, and oriented approximately coaxially with said bag-in-container's mouth,
comprising the following steps:
providing a preform, the preform consists of an assembly of two separate inner and outer preforms fitted into one another, the inner preform comprises a mouth and fitted in the outer preform, wherein said preform comprises at least one interface vent fluidly connecting an interface between inner and outer preforms to the atmosphere, said at least one vent running parallel to the interface between inner and outer preforms and opening to the atmosphere at a location adjacent to, and oriented approximately coaxially with, said inner preform's mouth, and wherein the inner preform is made of a different material from the outer preform;
bringing said preform to blow-moulding temperature;
fixing the heated preform at the level of the neck region with fixing means in the blow-moulding tool; and
blow-moulding the heated preform to form a bag-in-container.
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