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Title
Schichtfoermiges Material, insbesondere zur Verpackung von sauerstoffempfindlichen Produkten
Date Issued
2005
Author(s)
Dick, S.
Kraemer, I.
Goldhan, G.
Rodler, N.
Hubensteiner, T.
Stramm, C.
Rieblinger, K.
Patent No
102004021632
Abstract
Die vorliegende Erfindung betrifft ein schichtfoermiges Material, enthaltend zumindest die folgenden Schichten in Abfolge: a) eine Gasbarriereschicht, basierend auf EVOH; b) eine Haftmittelschicht, basierend auf mindestens einem anhydridisch modifizierten Polymer; c) eine Sauerstoffabsorberschicht aus mindestens einem polymeren, nicht teilchenfoermigen Sauerstoffabsorber, wobei vorzugsweise die Gesamtdicke der Haftmittelschicht(en) bei mindestens etwa 10 Mikrometer liegt, sowie ein Verfahren zu deren Herstellung und deren Verwendung.
WO2005108063 A UPAB: 20051216 NOVELTY - Multilayer material (I) containing at least (a) a gas-barrier layer based on EVOH and (c) an oxygen-absorber layer based on polymeric, non-particulate oxygen absorber(s), also has (b) a coupling layer based on anhydride-modified polymer(s) between layers (a) and (c). DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for (1) deep-drawable film (II) made from material containing (I) (2) blister packaging (III) made from (I), especially in deep-drawn form and optionally with metal foil sealed to it (3) a method for the production of (I), (II) or (III) by (a) making layers (a), (b) and (c) as above and then combining the layers together . USE - For the production of gas barrier material with an oxygen permeability of not more than 1 (preferably not more than 0.1) cm3/m2/d/bar, e.g. for reducing the oxygen content (or providing protection from oxygen) in a container or pack for an oxygen-sensitive product, especially for packaging solid, liquid or gaseous products such as pharmaceuticals (preferably in solid form such as tablets, capsules, coated tablets, powder or suppositories, or in liquid form) or for the packaging of several packaged units of pharmaceutical products, preferably in the form of sachets, bottles, trays, single-dose packs, blister packs or containers; or for packaging non-pharmaceutical chemicals, food, technical components (especially electrical and electronics components), cosmetics and non-pharmaceutical products made by biotechnology (especially enzymes or proteins) (claimed). ADVANTAGE - Multilayer material with very good barrier properties and good oxygen absorption properties, made by a simple, rapid process and especially suitable for the production of blister packs; this material overcomes the disadvantages of prior-art materials, e.g. poor oxygen absorption at low humidity, inadequate barrier properties (especially for oxygen), relatively high cost, unsatisfactory processing properties (deep drawing), poor interlayer adhesion, low transparency etc.
Language
de
Patenprio
DE 102004021632 A1: 20040503