METHOD FOR PROVIDING AN EXTREMELY CHEMICALLY RESISTANT FILM, FILM AND LAMINATE AVAILABLE THEREOF

Abstract

A method for providing a slide, wherein the method comprises the steps that: i) a base layer that is water and / or oxygen resistant is provided; ii) a layer comprising a bonding layer and a contact layer is coextruded to provide a coextruded layer; iii) the coextrusion layer is coated onto the base layer; iv) the coextruded layer coated onto the base layer is allowed to adhere to obtain a film resistant to aggressive chemicals, wherein the aggressive chemical is nicotine, fentanyl, lidocaine or rivastigmine, wherein the film comprises the coextruded layer formed from the bonding layer and the contact layer, which is coated onto the base layer, the bonding layer comprising at least one layer; and wherein the contact layer comprises a polymer having a RED value towards an aggressive chemical, namely nicotine, fentanyl, lidocaine or rivastigmine, based on the Hansen's solubility parameter (HSP) of > 0.8, more preferably a RED value in the range of 0.8 to 10, more preferably 0.8 to 5 and most preferably 1 to 2.

Claims

[1] A method of providing a film, the method comprising the steps of: i) a base layer which is water and / or oxygen resistant is provided; ii) a layer comprising a tie layer and a contact layer is co-extruded to provide a co-extrusion layer; iii) the coextrusion layer is coated onto the base layer; iv) adhering the coextrusion layer coated onto the base layer to obtain a film resistant to aggressive chemicals, wherein the aggressive chemical is nicotine, fentanyl, lidocaine, or rivastigmine, the film comprising the coextrusion layer formed from the tie layer and the contact layer coated onto the base layer, the tie layer comprising at least one layer; and the contact layer comprising a polymer having an RED value to an aggressive chemical, namely nicotine, fentanyl, lidocaine, or rivastigmine, based on the Hansen's Solubility Parameter (HSP) of > 0.8, more preferably an RED value in the range of 0.8 to 10, even more preferably 0.8 to 5, and most preferably 1 to 2. [2] Method according to claim 1, wherein the water and / or oxygen resistant base layer is selected from the group consisting of a metal foil, preferably aluminum foil, a polymer such as a polymer of polyamide, polyvinylidene chloride, silicon or aluminum oxide coated polyesters and / or fluoropolymers. [3] A method according to any one of claims 1 to 2, wherein the bonding layer is made of 1, 2, 3, 4 or 5 layers. [4] The method of claim 3, wherein all layers of the bonding layer are coextruded with the contact layer. [5] A method according to any one of the preceding claims, wherein the tie layer consists of a layer and wherein the layer is a copolymer made from a material selected from a copolymer of ethylene and acrylic acid, ethylene and methacrylic acid and a terpolymer comprising ethylene, acrylic ester and a third polymer, wherein the third polymer is preferably a glycidyl methacrylate and more preferably a maleic anhydride. [6] A method according to any one of claims 1 to 4, wherein the tie layer comprises at least two layers, and wherein the first layer comprises a copolymer according to claim 5 and the at least second or more layer(s) comprises a material selected from EEA, PE, EMA, EAA or a combination. [7] A method according to any one of the preceding claims, wherein the contact layer comprises a polymer selected from the group consisting of a cycloolefin copolymer, a polyamide or an ethylene vinyl alcohol. [8] A method according to any one of the preceding claims, wherein the tie layer or the plurality of tie layer forming layers has a loading in the range of 7 to 20 g / m 2 and / or the contact layer has a loading in the range of 4 to 20 g / m 2 and the film loading does not exceed 40 g / m 2 amounts. [9] An aggressive chemical resistant film, wherein the aggressive chemical is nicotine, fentanyl, lidocaine or rivastigmine, the film comprising at least one base layer which is water and / or oxygen resistant and a coextrusion layer, wherein the coextrusion layer comprises a tie layer and a contact layer, and wherein the tie layer comprises at least one layer and wherein the contact layer comprises a polymer having an RED value to an aggressive chemical, namely nicotine, fentanyl, lidocaine or rivastigmine, based on the Hansen's Solubility Parameter (HSP) of > 0.8, more preferably an RED value in the range of 0.8 to 10, even more preferably 0.8 to 5 and most preferably 1 to 2. [10] A film according to claim 9, wherein the base layer, which is water and / or oxygen resistant, is selected from the group consisting of metal foil, preferably aluminum foil, polymers such as polyamide, polyvinylidene chloride, silicon- or aluminum oxide-coated polyesters, and / or fluoropolymers; and / or the tie layer consists of a layer, wherein the layer is made of a copolymer, wherein the copolymer comprises a material selected from a copolymer of ethylene and acrylic acid, ethylene and methacrylic acid and a third polymer, wherein the third polymer is preferably made of a material selected from glycidyl methacrylate and more preferably from maleic anhydride; and / or wherein the contact layer comprises a polymer or is a polymer selected from the group consisting of a cycloolefin copolymer, a polyamide or an ethylene vinyl alcohol. [11] A film according to claim 9 or 10, wherein the tie layer or the plurality of tie layer forming layers has a loading in the range of 7 to 20 g / m 2 and / or the contact layer has a loading in the range of 4 to 20 g / m 2 and the film loading does not exceed 40 g / m 2 amounts. [12] An aggressive chemical substance, namely nicotine, fentanyl, lidocaine or rivastigmine, packaged in a heat-sealable laminate, the heat-sealable laminate - a first outer layer made of a mechanically wear-resistant material; - a film resistant to aggressive chemicals according to claim 9, wherein the base layer side of the film faces the outer layer. [13] Use of a polymer having a RED value to an aggressive chemical, namely nicotine, fentanyl, lidocaine or rivastigmine, based on the Hansen's solubility parameter (HSP) of > 0.8, preferably having a RED value in the range of 0.8 to 10, more preferably 0.8 to 5 and most preferably 1 to 2 as a contact layer to impart chemical resistance to a film, wherein the film comprises a base layer which is water and / or oxygen resistant, wherein the film is coated onto an optionally co-extruded layer comprising a tie layer and the contact layer. [14] Use according to claim 13, wherein the polymer is selected from the group consisting of a cycloolefin copolymer, a polyamide or an ethylene vinyl alcohol. [15] A method for producing a film resistant to aggressive chemicals, wherein the film is resistant to nicotine, rivastigmine, fentanyl and / or lidocaine, and wherein the method comprises the steps of i) a base layer which is water and / or oxygen resistant is provided; ii) a layer comprising a tie layer and a contact layer is co-extruded to provide a co-extrusion layer; iii) the coextrusion layer is coated onto the base layer; iv) the coextrusion layer coated onto the base layer is allowed to adhere to obtain an aggressive chemicals resistant film comprising the tie layer and the contact layer as a formed coextrusion layer coated onto the base layer, wherein the tie layer comprises at least one layer and wherein the contact layer comprises a polymer having a RED value to nicotine, fentanyl, lidocine or rivastigmine based on the Hansen's solubility parameter (HSP) of > 0.8, more preferably a RED value in the range of 0.8 to 10, even more preferably 0.8 to 5 and most preferably 1 to 2.