Multilayer Thermoformable Materials and Sanitary Food Containers Made Therefrom
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    发明申请
    Multilayer Thermoformable Materials and Sanitary Food Containers Made Therefrom 审中-公开
    多层可热成型材料和卫生食品容器

    公开(公告)号:US20140054292A1

    公开(公告)日:2014-02-27

    申请号:US13641056

    申请日:2011-04-12

    申请人: Millard F. Wallce

    发明人: Millard F. Wallce

    IPC分类号: A47G19/02 B65D25/16 A47G23/06

    摘要: A multilayer stack of polymeric sheets can be used in thermoforming processes to make objects wherein each sheet has substantially the same shape. The stack includes at least one sheet of a thermoformable polymer, and can include many such sheets. A barrier layer is interposed between at least an overlapping portion at least two of the polymeric sheets in order to prevent fusion of the sheets in the overlapping portion during the thermoforming process. The barrier layer can include an adhesive that adheres the sheets in the overlapping portion. In formed articles including such an adhesive, the sheets can be manually peeled from one another if a suitable adhesive is selected. The stack (and object formed using the stack) can include polymeric sheets that are not thermoformable, but are adhered to the surface of a thermoformable sheet. The sheets and objects can include multiple separable and/or peelable sheets. The stack can be used, for example, to make peelable, re-usable food service trays. In such trays, a rigid base has multiple peelable sheets adhered to at least one surface thereof, the sheets being peelable from the surface to reveal a sanitary surface amenable to food contact.

    摘要翻译: 聚合物片材的多层叠层可用于热成型工艺中以制造其中每个片材具有基本相同形状的物体。 堆叠包括至少一片可热成型聚合物片,并且可以包括许多这样的片材。 在至少两个聚合物片材的至少两个重叠部分之间插入阻挡层,以防止在热成型过程中重叠部分中的片材熔化。 阻挡层可以包括将片材粘附在重叠部分中的粘合剂。 在包括这种粘合剂的成形制品中,如果选择合适的粘合剂,则可以彼此手动地剥离片材。 堆叠(和使用堆叠形成的物体)可以包括不可热成型但粘附到可热成形片材的表面的聚合物片材。 片材和物体可以包括多个可分离和/或可剥离的片材。 例如,可以使用堆叠来制造可剥离的,可重复使用的食品托盘。 在这样的托盘中,刚性基座具有多个可剥离的片材,粘合到其至少一个表面上,片材可从表面剥离以露出适于食物接触的卫生表面。