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    • 6. 发明申请
    • Preservation of the Appearance of Pre-Printed Graphics on Hot Stretched Film
    • 在热拉伸薄膜上保留预印图形的外观
    • US20130161872A1
    • 2013-06-27
    • US13332769
    • 2011-12-21
    • Brian Joseph ConradGordon Charles SarxDaniel Frank Janichek
    • Brian Joseph ConradGordon Charles SarxDaniel Frank Janichek
    • B29C51/00
    • B29C51/422B29C51/10B29C2791/006B29C2795/002B29K2023/086B29K2067/00B29K2077/00B29K2105/02B29K2227/06B29K2995/0049B29K2995/0067B29L2031/7162
    • The present disclosure is concerned with improving the appearance of graphics printed on a flexible polymer film which is subsequently heated to a forming temperature and then drawn into a mold to form a cavity adapted for the packaging of an item, typically a food item. The improvement is effected by reducing the heat transfer to the portions of the film carrying the graphics thereby reducing the formability of these portions so that they stretch less than the rest of the film which is drawn into the mold. Typically the film is heated by contact with a heated platen. In such cases the reduced heat transfer can be effected by having zones of a cooler temperature which are adapted to be in registry with the portions of the film carrying the graphics or by covering the portions of the heated platen in registry with these graphics with an insulating material such as Teflon tape. The mouth of the cavity can then be closed by sealing to another flexible polymeric film. If the films used are heat shrinkable, the sealed package can be subjected to thermal conditions which cause it to shrink about the packaged item.
    • 本公开涉及改进印刷在柔性聚合物膜上的图形的外观,随后将其加热至成形温度,然后将其拉入模具中以形成适于包装物品(通常为食品)的空腔。 改善是通过减少传递到载有图形的膜的部分的热传递而实现的,从而降低了这些部分的可成形性,使得它们比拉入模具的其余部分拉伸得少。 通常,通过与加热的压板接触来加热薄膜。 在这种情况下,减少的热传递可以通过具有较冷温度的区域来实现,该区域适于与承载图形的膜的部分对准,或者通过用绝缘体覆盖加热压板的这些图形的部分 材料如铁氟龙胶带。 然后可以通过密封到另一柔性聚合物膜来封闭空腔的口。 如果使用的膜是可热收缩的,密封的包装可以经受使其围绕包装物品收缩的热条件。