Method for providing an extreme chemical resistant film, a film and laminate obtainable therefrom

An aggressive chemical-resistant film, comprising:

• a base layer that is one or more of water resistant or oxygen resistant;
• a co-extrusion layer, wherein the co-extrusion 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 a relative energy difference (RED) value based on Hansen's Solubility parameter (HSP) of greater than 0.8 towards one or more of:
• nicotine, rivastigmine, fentanyl, or lidocaine;
• wherein the polymer of the contact layer comprises one of:
• a polyamide or an ethylene vinyl alcohol, and wherein the co-extrusion layer is coated to the base layer such that the base layer and the contact layer are connected by the tie layer.

A laminate for packing an aggressive chemical substance said laminate comprising:

• a first outer layer made of a mechanically wear resistant material;
• and
• an aggressive chemical resistant film comprising a base layer that is one or more of water resistant or oxygen resistant and a co-extrusion layer, said co-extrusion layer comprising a tie layer and a contact layer, where the contact layer comprises a polymer having a relative energy difference (RED) value of greater than 0.8 towards one or more of:
• nicotine, rivastigmine, fentanyl, or lidocaine;
• wherein the polymer of the contact layer comprises one of:
• a polyamide or an ethylene vinyl alcohol;
• and wherein the base layer side of the film is facing a first outer layer.

An aggressive chemical substance packed in a heat sealable laminate, said heat sealable laminate comprising:

• a first outer layer made of a mechanically wear resistant material;
• an aggressive chemical resistant film comprising a base layer that is one or more of water resistant or oxygen resistant and a coextrusion layer, said coextrusion layer comprising a tie layer and a contact layer, wherein the base layer side of the film is facing the outer layer;
• and, wherein the contact layer comprises a polymer having a relative energy difference (RED) value of greater than 0.8 towards one or more of:
• nicotine, rivastigmine, fentanyl, or lidocaine;
• wherein the polymer of the contact layer comprises one of:
• a polyamide or an ethylene vinyl alcohol.

A method for providing an aggressive chemical resistant film said film being resistant against one or more of nicotine, rivastigmine, fentanyl or lidocaine, and wherein said method comprises:

• providing a base layer that is one or more of water resistant or oxygen resistant;
• coextruding a layer comprising a tie layer and a contact layer to provide a coextrusion layer;
• coating the coextrusion layer to the base layer;
• allowing the coextrusion layer coated to the base layer to adhere to provide the aggressive chemical resistant film comprising the tie layer and the contact layer formed as a coextrusion layer coated to the base layer, wherein the tie layer comprises at least one layer and wherein the contact layer comprises a polymer having a relative energy difference (RED) value based on a Hansen's Solubility parameter (HSP) of greater than 0.8 towards one or more of:
• nicotine, rivastigmine, fentanyl, or lidocaine;
• wherein the polymer of the contact layer comprises one of:
• a polymide or an ethylene vinyl alcohol.

A method for providing an aggressive chemical resistant film, wherein said method comprises:

• providing a base layer that is one or more of water resistant or oxygen resistant;
• coextruding a layer comprising a tie layer and a contact layer to provide a coextrusion layer;
• coating the coextrusion layer to the base layer;
• allowing the coextrusion layer coated to the base layer to adhere to provide the aggressive chemical resistant film comprising the tie layer and the contact layer formed as a coextrusion layer coated to the base layer, wherein the tie layer comprises at least one layer and wherein the contact layer comprises a polymer comprising one or more of a cyclic olefin copolymer, a polyamide, or, an ethylene vinyl alcohol, and wherein the polymer of the contact layer has a relative energy difference (RED) value based on Hansen's Solubility parameter (HSP) of greater than 0.8 towards one or more of:
• nicotine, rivastigmine, fentanyl, or lidocaine;
• wherein the polymer of the contact layer comprises one of:
• a polyamide or an ethylene vinyl alcohol.