초록 ▼

Multi-layer laminated sandwich sheet, comprising at least two layers which are superimposed and stuck together by welding or gluing, one layer being constituted by a material impervious to the active volatile agents of a perfuming or deodorizing composition, of an aroma or of an insecticidal or bact

Multi-layer laminated sandwich sheet, comprising at least two layers which are superimposed and stuck together by welding or gluing, one layer being constituted by a material impervious to the active volatile agents of a perfuming or deodorizing composition, of an aroma or of an insecticidal or bactericidal substance, and the other layer being composed of a film made from a polymer or a copolymer with a polyolefin base or from a copolymer of polyamide and polyether, which film contains, in dispersed and homogeneous phase, a base constituted by a perfuming or deodorizing composition, an aroma or an insecticidal or bactericidal substance, and packaging utilizing the said sheet.

대표청구항 ▼

A multilayer sandwich sheeting comprising at least two separately and simultaneously extruded layers of polymeric materials, a first layer being composed of a first polymeric material selected from a group consisting of a polyolefin resin and a copolymer of polyamide and polyether, said first polyme

A multilayer sandwich sheeting comprising at least two separately and simultaneously extruded layers of polymeric materials, a first layer being composed of a first polymeric material selected from a group consisting of a polyolefin resin and a copolymer of polyamide and polyether, said first polymeric material being mixed before extruding with a volatile active agent selected from the group consisting of a perfuming composition, a deodorizing composition, a flavoring agent, an aroma agent, an insecticidal substance and a bactericidal substance; and a second layer being composed of a second polymeric material which is impervious to said volatile active agent, said second layer being extruded as the outer layer while the first layer forms the inner layer, such that evaporation of said volatile active agent is substantially prevented during said extrusion; said first and second layers being permanently stuck together.