Patent Type: Invention Patent Inventor: Paul E. Hansen; John W. Rowan; Nathan K. Hagen Applicant: 3M Innovations Ltd. Master Applicant Address: Minnesota, USA Application No. 6
Application Date: 2004.06.05
Approval notice number: 1802298
Auditing Announcement Date: 2006.07.12
Main classification number: B65D81/32 (2006.01)I
Classification number: B65D81/32 (2006.01)I
Category classification number:
Priority item: 2003.6.5 US 10/455,055
Manual CD-ROM: D0628-1
International application: 2004-06-05 PCT/US2004/017730
International Publication: 2004-12-16 WO2004/108558 English Abstract: A destructible seal consists of a film made of a first polymer, a film made of a second polymer and a sealing intermediate layer. The sealing intermediate layer has a melting point higher than the melting point of the first polymer and higher than the melting point of the second polymer, and contains a plurality of microfibers having an average effective fiber diameter of about 2.5 μm to about 7.0 μm. A film made of a first polymer and a film made of a second polymer are fused to each of the two sides of the sealing interlayer, forming a breakable seal with a frangible interface, the frangible interface comprising A portion where the first polymer contacts the second polymer. The breakable seal breaks under the force that causes separation and clearance of the first boundary layer from the second boundary layer.
Sovereign items: 1. A destructible seal comprising: a first polymer having a first melting point; a second polymer having a second melting point; and a sealing intermediate layer having a first side opposite the second side, The first side includes a first boundary layer bonded to a portion of the first polymer, the second side includes a second boundary layer bonded to a portion of the second polymer, the middle of the seal The melting point of the layer is higher than the first melting point and the second melting point, the sealing intermediate layer comprises a plurality of microfibers, the average effective fiber diameter of the microfibers is from about 2.5 μm to about 7.0 μm, the first The boundary layer includes a first portion of the plurality of microfibers surrounded by the first polymer, and the second boundary layer includes a second portion of the plurality of microfibers surrounded by the second polymer. The breakable seal has a frangible interface between the first boundary layer and the second boundary layer, and in the case of a force that separates the first boundary layer from the second boundary layer, the The breakable seal breaks at the frangible interface.
Agency: Zhongyuan Xinda Intellectual Property Agency Co., Ltd. Agent: Lu Hao; Xie Lina Database Name: Invention Patent Database
Reprinted from: Wanfang Data
