EP 0116414 A1 19840822 - Paperlike sheet materials.
Title (en)
Paperlike sheet materials.
Title (de)
Papierähnliche Bahnmaterialien.
Title (fr)
Matériaux sous forme de feuilles semblables au papier.
Publication
Application
Priority
GB 8302166 A 19830126
Abstract (en)
A thermally formable paperlike sheet material comprising at least 25% synthetic thermoplastics material a substantial proportion of which is fibrillated, with at least a substantial portion of the balance 100% being of cellulosic fibres, said sheet having a thickness of less than 140 microns and being treated to exhibit a minimum tensile strength along a first axis of 12 Newtons, and along a second axis at right angles to the first axis of 8 Newtons, per 25 millimetres of width transverse to the respective axis, and a permeability to air of less than 100,000 cubic centimetres per minute through an area of 10 square centimetres and at a pressure of 10 centimetres water gauge. Such sheet material finds particular application for use as wrappers or in forming sealed closures (4) for containers (2) having convoluted surfaces (3) and which hold materials (1) like freshly ground coffee which are required to breathe (7) without being exposed to ambient conditions.
IPC 1-7
IPC 8 full level
D21H 13/10 (2006.01); B65D 65/38 (2006.01)
CPC (source: EP)
B65D 65/38 (2013.01); D21H 5/00 (2013.01); D21H 13/14 (2013.01); D21H 17/35 (2013.01)
Citation (search report)
- DE 2344367 A1 19750320 - SCHOELLER FELIX JUN FA
- DE 2358506 A1 19740612 - MITSUBISHI PAPER MILLS LTD
- GB 1491937 A 19771116 - MONTEDISON SPA
- GB 1453503 A 19761027 - SOLVAY
- FR 2169197 A1 19730907 - CROWN ZELLERBACH INT INC [US]
- GB 1189269 A 19700422 - ETHYLENE PLASTIQUE SA [FR]
- GB 1155823 A 19690625 - WALDHOF ZELLSTOFF FAB [DE]
- US 3298855 A 19670117 - HELIN ARTHUR F, et al
- US 3029940 A 19620417 - STIG LAGERGREN
- EP 0011488 A1 19800528 - WIGGINS TEAPE GROUP LTD [GB]
- CH 99775 A 19230616 - HELVETIA K A G MEISTER THOMI & [CH]
- V. STANNETT et al.: "Permeability of plastic films and coated paper to gases and vapors", Tappi Monograph Series no. 23, 1962, Technical Association of the Pulp and Paper Industry, New York, US
Designated contracting state (EPC)
AT BE CH DE FR GB IT LI NL
DOCDB simple family (publication)
EP 0116414 A1 19840822; AU 2362184 A 19840802; BR 8400283 A 19840828; ES 529136 A0 19850701; ES 8506369 A1 19850701; FI 840271 A0 19840123; FI 840271 A 19840727; GB 8302166 D0 19830302; JP S59163500 A 19840914; ZA 84331 B 19850327
DOCDB simple family (application)
EP 84300295 A 19840118; AU 2362184 A 19840119; BR 8400283 A 19840125; ES 529136 A 19840125; FI 840271 A 19840123; GB 8302166 A 19830126; JP 1179684 A 19840125; ZA 84331 A 19840117