发明授权
- 专利标题: Pattern laminated double wall plastic web from heat shrinkable and non-heat shrinkable films
- 专利标题(中): 图案层压双壁塑料网由热收缩和非热收缩膜
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申请号: US14077412申请日: 2013-11-12
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公开(公告)号: US09242431B2公开(公告)日: 2016-01-26
- 发明人: Tara K. Cruz , Tyler J. Theobald
- 申请人: Curwood, Inc.
- 申请人地址: US WI Neenah
- 专利权人: Bemis Company, Inc.
- 当前专利权人: Bemis Company, Inc.
- 当前专利权人地址: US WI Neenah
- 代理商 Tom J. Hall
- 主分类号: B65D81/00
- IPC分类号: B65D81/00 ; B65D85/00 ; B65D75/00 ; B32B7/14 ; A23L1/00
摘要:
The present disclosure is concerned with forming and non-forming webs with improved puncture resistance suitable for use in semi-automatic horizontal form fill and seal (HFFS) packaging machines and a process for packaging hard food items with sharp angular surfaces using such webs in such machines. The webs have a double wall partially laminated structure. The structure is conveniently formed by adhesively laminating two component films in a face to face configuration using a pattern of adhesive which leaves a substantial portion of the two facing surfaces unlaminated. The lamination just needs to be sufficient that the two component films will hot form together when they are vacuum drawn into a die to form a cavity for packaging the food items. The webs comprise at least a first thermoplastic component film having substantial stored shrink forces and a second thermoplastic component film having no substantial stored shrink forces.
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