EP 0344839 A1 19891206 - A bi-functionally active packaging material for microwave food products.
Title (en)
A bi-functionally active packaging material for microwave food products.
Title (de)
Bifunktionelles aktives Verpackungsmaterial für Mikrowellenlebensmittelprodukte.
Title (fr)
Matière d'emballage active bifonctionnelle pour produits alimentaires pour micro-ondes.
Publication
Application
Priority
NL 8801407 A 19880601
Abstract (en)
A bi-functional laminate which in a microwave oven converts irreversibly, after a time and at a temperature controlled by the components of the laminate, from a microwave screen with absorbing properties to a microwave transparent material with much weaker absorbing properties. The said laminate is constructed from - a plastic film selected for its compatibility for food contact and for its softening temperature which determines the changeover conversion temperature; - a metal layer vacuum deposited on the plastic layer, the metal being deposited to just sufficient thickness to provide a complete screen to microwave transmission at room temperature (transmission less than 1%); - an adhesive and - a paper or paper-board supporting material of a weight selected to give the required heat-up time to the changeover conversion temperature, said supporting material being adhered to said metal layer.
IPC 1-7
IPC 8 full level
B65D 81/34 (2006.01)
CPC (source: EP)
B65D 81/3446 (2013.01); B65D 2581/344 (2013.01); B65D 2581/3447 (2013.01); B65D 2581/3454 (2013.01); B65D 2581/3466 (2013.01); B65D 2581/3472 (2013.01); B65D 2581/3478 (2013.01); B65D 2581/3487 (2013.01)
Citation (search report)
- [A] FR 2451182 A1 19801010 - SEIFERTH OSCAR [US]
- [A] EP 0000797 A1 19790221 - PROCTER & GAMBLE [US]
- [A] EP 0242952 A2 19871028 - DU PONT [US]
- [A] EP 0245005 A2 19871111 - INT PAPER CO [US]
- [A] US 4230924 A 19801028 - BRASTAD WILLIAM A, et al
- [A] US 4713510 A 19871215 - QUICK JAMES R [US], et al
- [A] EP 0251445 A2 19880107 - INT PAPER CO [US]
Designated contracting state (EPC)
BE DE FR GB NL
DOCDB simple family (publication)
DOCDB simple family (application)
EP 89201319 A 19890522; NL 8801407 A 19880601