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2. 发明申请

US20040043233A1 Dual-ovenable, heat-sealable packaging film 有权
标题翻译：双可烘烤，可热封包装膜
公开(公告)号：US20040043233A1
公开(公告)日：2004-03-04
申请号：US10228515
申请日：2002-08-27
申请人： Cryovac, Inc.
发明人： Arthur Leroy Berrier , Cynthia Louise Ebner
IPC分类号： B32B001/02
CPC分类号： B32B27/34 , B32B27/08 , B32B27/18 , B65D81/3461 , Y10T428/1352 , Y10T428/1379 , Y10T428/1383 , Y10T428/31725 , Y10T428/31728 , Y10T428/31732
摘要： A dual ovenable film having a first layer comprising one or more polyamides and a second layer comprising one or more polyamides. The first layer forms the first outer surface of the film. The second layer has a melting point of at least about 210null C. The film is capable of forming a water-containing package by providing two 4 inch by 6 inch sheets of the film each having four perimeter sides, placing the sheets in superimposed, coextensive arrangement having the first layers of the films in contact with each other, and heat sealing three perimeter sides of the sheets together using a null-inch wide sealing bar at a temperature of 290null F., a dwell time of 0.5 seconds, and a sealing pressure of 40 psig to form an open pouch having heat seals along three of the four perimeter sides. The open pouch can be filled with 100 milliliters of distilled water at a temperature of 73null F and the fourth perimeter side of the sheet can be heat sealed together under the same conditions as used to seal the three perimeter sides to form a closed package having a heat seal along the fourth perimeter side and containing the water. The seal strength of the resulting heat seals is at least 1 pound/inch after the closed, water-containing package has been exposed to three hours in a conventional oven at 400null F. (air temperature). The film may be used to form heat sealed pouches at nullpolyolefin-typenull of heat seal conditions, yet the integrity of the heat seals may be maintained even when the heat seal is exposed to conventional oven conditions.
摘要翻译：一种双可烘烤膜，其具有包含一种或多种聚酰胺的第一层和包含一种或多种聚酰胺的第二层。第一层形成膜的第一外表面。第二层具有至少约210℃的熔点。该膜能够通过提供两个4英寸×6英寸的膜片来形成含水包装，每片具有四个周边侧面，将片材叠加在一起，共同布置，其中第一层膜彼此接触，并且在290°F的温度下使用1/8英寸宽的密封条将片材的三个周边热封在一起，停留时间为0.5秒以及40psig的密封压力以形成沿着四个周边侧面中的三个具有热密封的开口袋。打开的袋可以在73°F的温度下填充100毫升蒸馏水，并且在与用于密封三个周边侧面的相同条件下，片材的第四周边可以热密封在一起以形成封闭的包装，沿着第四周边的热封并且容纳水。封闭的含水包装在常规烘箱中在400°F（空气温度）下暴露3小时之前，所得热封的密封强度至少为1磅/英寸。该膜可以用于在“聚烯烃型”热封条件下形成热密封袋，但是即使当热密封暴露于常规烘箱条件时，也可以保持热密封的完整性。

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