摘要:
Thin-walled articles, particularly sheets of film including at least one first layer of polymeric material including starch and at least one second layer of hydrophobic material, are characterised in that the second layer includes a natural or synthetic wax or a mixture of waxes.
摘要:
A layered material such as a packaging laminate for a packaging container possessing superior oxygen gas and aroma barrier properties is disclosed. The packaging laminate comprises a first laminate unit (10a) and a second laminate unit (10b) which are bonded together by the intermediary of an interjacent layer of an adhesive (11). The first laminate unit has a rigid, but foldable core layer (12) and outer, surrounding layers (13, 14) of thermoplastic, and the second laminate unit has a flexible substrate or carrier layer (15) of thermoplastic which, on its surface, carries a layer (16) acting as an oxygen gas and aroma barrier and consisting of a silicon oxide deposited by chemical plasma deposition and having the general chemical formula SiOx, in which x may vary within the range of between 1.5 and 2.2. A flexible laminate having an SiOx barrier layer is also disclosed.
摘要:
Des articles à parois minces, en particulier des feuilles d'un film comprenant au moins une première couche d'un matériau polymère contenant de l'amidon, et au moins une seconde couche d'un matériau hydrophobe, sont caractérisés par le fait que la seconde couche comprend une paraffine naturelle ou synthétique ou un mélange de paraffines.
摘要:
A permanent paper is disclosed which employs as a stock pulp slurry containing at least one kind of filler, and aluminum sulfate, a hydrophobic modified rosin emulsion sizing agent and a water-soluble alkaline salt, wherein the pH where said filler is dispersed in water to form 10% of a dispersion is 4 - 8, the pH of said pulp slurry is controlled within 6.5 - 7.5 and an alkaline salt of an acid having a pKa of 5 - 14 at a 25°C aqueous solution is coated onto said paper and the pH of the coated paper extract in cold water is 7.5 - 9.0.
摘要:
Verfahren zur Verringerung der Wasserdampfdurchlässigkeit von Papier, Pappe o.dgl. bei dem das Papier mit einem Auftragsmedium beschichtet wird. Eine Wasserdampfdichtheit wird dadurch erreicht, daß das Auftragsmedium aus einer Freiharzleimdispersion gebildet wird, die Additive zur Verbesserung der Filmbildungseigenschaften enthält.
摘要:
Aqueous dispersions of rosin and synthetic sizing agent wherein the particles in the dispersed phase contain a mixture of rosin and the synthetic sizing agent and wherein the dispersions contain a polyaluminum compound. The dispersions are prepared by homogenization of a homogenous mixture of rosin material and the synthetic sizing agent and the polyaluminum compound can either be present at the production or be added to an aqueous dispersion of mixed particles. The dispersions are used as sizing agents at the production of paper, paper board, board and similar products.