Stock material or miscellaneous articles – Composite – Of polyamide
Reexamination Certificate
2005-03-29
2005-03-29
Nutter, Nathan M. (Department: 1711)
Stock material or miscellaneous articles
Composite
Of polyamide
C428S474700, C428S474900, C428S475200, C428S475500, C428S475800, C428S476300, C428S500000, C428S507000, C428S511000, C428S515000, C428S537500
Reexamination Certificate
active
06872459
ABSTRACT:
This invention relates to the laminated material for food packaging, and its manufacturing process. The laminated material (10) consists of the quality keeping intermediate layer (12) laminated inside the paper core layer (11) and the core layer and the heat sealable innermost layer (13). The quality keeping intermediate layer comprises of an extrusion coatable blend polymer consisting of polymer component A 50-95% of nylon-MXD6 or EVOH and, polymer component B 5-50% of nylon 6, nylon 6, the blends or PET. The quality keeping intermediate layer is extruded and laminated directly in the core layer, the innermost layer contains at least the linear low density polyethylene which has a narrow molecular weight distribution, and has the properties parameter of mean density of 0.910-0.925, 100-122 degrees C. peak melting point, melt flow index of 5-20, swelling ratio (SR) of 1.4-1.6, and 5-50 micrometer layer thickness.The hardness, production efficiency, and cost performance of the barrier packaging container formed by the packaging material are improved.
REFERENCES:
patent: 5413845 (1995-05-01), Lofgren et al.
patent: 6436547 (2002-08-01), Toft et al.
patent: 6-80873 (1994-03-01), None
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patent: 9-58650 (1997-03-01), None
patent: 9-277456 (1997-10-01), None
patent: 9-278953 (1997-10-01), None
patent: 11-49140 (1999-02-01), None
Frisk Peter
Kobayashi Norio
Ogita Hiroaki
Nutter Nathan M.
Tetra Laval Holdings & Finance S.A.
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