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    • 7. 发明授权
    • Textured porous barrier transfer casing
    • US11134693B2
    • 2021-10-05
    • US16055443
    • 2018-08-06
    • Viscofan S.A.
    • Frank RaueJeremey Hinkle
    • A22C13/00B32B1/08B32B3/26B32B5/20B32B7/12B32B27/06B32B27/08B32B27/20B32B27/30B32B27/32B32B27/34B32B27/36B65D65/38B65D85/08B29L7/00B29L9/00
    • The present invention provides a multi-layered coextruded thermoplastic food casing comprising: at least one thermoplastic porous absorbing layer; and at least one layer having a barrier effect for water vapor and/or oxygen, wherein the at least one layer having a barrier effect for water vapor and/or oxygen has an average layer thickness in a range of from 5 to 60 μm over the entire surface area, wherein the at least one thermoplastic porous absorbing layer comprises as a main component at least one thermoplastic polymer material selected from the group consisting of (co)polyamides and (co)polyolefins, wherein the at least one thermoplastic porous absorbing layer comprises areas having a reduced average layer thickness and areas having a non-reduced average layer thickness, wherein the average layer thickness of the at least one thermoplastic porous absorbing layer in areas having a non-reduced average layer thickness is in a range of from 10 to 200 μm, wherein the average layer thickness in areas having a reduced average layer thickness is lower by 7 to 140 μm and is reduced by a range of from 30 to 85% compared to the areas having a non-reduced average layer thickness of the at least one thermoplastic porous absorbing layer, and wherein both areas having a reduced average layer thickness and a non-reduced average layer thickness comprise pores which are able to absorb a functional additive.