Environment-friendly foamed container closure laminate with embossed tabs
An environment-friendly foamed container closure laminate with embossed tabs is composed of, from top to bottom, a stiff polymer printing layer—the top surface of a half thereof is embossed, the bottom surface is printed; a stiff polymer reinforcement layer—its half bottom surface is embossed and the stiff polymer printing layer laminated with the stiff polymer reinforcement layer is used as a tab (if no printing is necessary, the stiff polymer printing layer and the stiff polymer reinforcement layer are combined to be a tab layer); a soft polymer foam layer—used as a sealing gasket; a high melting point polymer isolation layer—to insulate the heat transfer from the electromagnetic induction heated metal layer to the soft polymer foam layer; an electromagnetic induction heatable metal layer; and a peelable thermosensitive adhesive layer.
1. An environment-friendly foamed container closure laminate with embossed tabs, comprising:
six layers comprising from top to bottom:
a polyethylene terephthalate printing layer comprising a top surface and a bottom surface, wherein half of said top surface comprises an embossed surface, said bottom surface comprising a printed surface;
a polyethylene terephthalate reinforcement layer comprising a bottom reinforcement layer surface, said polyethylene terephthalate reinforcement layer being in direct contact with said polyethylene terephthalate printing layer, wherein half of said bottom surface comprises an embossed surface, said polyethylene terephthalate printing layer being laminated with said polyethylene terephthalate reinforcement layer to form a laminated polyethylene terephthalate printing layer and reinforcement layer, said laminated polyethylene terephthalate printing layer and reinforcement layer defining a tab;
a soft polymer foam layer defining a sealing gasket, said soft polymer foam layer being in direct contact with said polyethylene terephthalate reinforcement layer;
a polyethylene terephthalate isolation layer in direct contact with said soft polymer foam layer;
an electromagnetic induction heated metal layer, said polyethylene terephthalate isolation layer insulating a heat transfer from said electromagnetic induction heated metal layer to said soft polymer foam layer, said electromagnetic induction heated metal layer being in direct contact with said polyethylene terephthalate isolation layer; and
a peelable thermosensitive adhesive layer in direct contact with electromagnetic induction heated metal layer.
2. The environment-friendly foamed container closure laminate with embossed tabs as claimed in claim 1 , wherein said soft polymer foam layer is one of low density polyethylene, linear low density polyethylene, ethylene-vinylacetate copolymer, HDPE, PP and a mixture of LDPE and above mentioned polyolefin, and a layer thickness range is 50 to 400 microns and a foaming ratio is 1.1 to 5.0.
3. The environment-friendly foamed container closure laminate with embossed tabs as claimed in claim 1 , wherein the electromagnetic induction heatable metal layer is an aluminum foil with a thickness range between 5˜100 microns.
4. The environment-friendly foamed container closure laminate with embossed tabs as claimed in claim 1 , wherein the peelable thermosensitive adhesive layer is a hot melt adhesive film with a thickness range between 10˜80 microns.
5. An environment-friendly foamed container closure laminate with embossed tabs, comprising:
five layers comprising from top to bottom:
a polyethylene terephthalate printing layer, wherein half of one side of said polyethylene terephthalate is embossed to define an embossed side portion, said embossed side portion defining a tab;
a soft polymer foam layer defining a sealing gasket, said soft polymer foam layer being in direct contact with said polyethylene terephthalate printing layer;
a polyethylene terephthalate isolation layer in direct contact with said soft polymer foam layer;
an electromagnetic induction heatable metal layer in direct contact with said polyethylene terephthalate isolation layer, said polyethylene terephthalate isolation layer insulating a heat transfer from the electromagnetic induction heated metal layer to the soft polymer foam layer; and
a peelable thermosensitive adhesive layer in direct contact with said electromagnetic induction heatable metal layer.
6. An environment-friendly foamed container closure laminate with embossed tabs, comprising:
a polyethylene terephthalate printing layer comprising a top surface and a bottom surface, at least half of said top surface comprising an embossed surface, said bottom surface comprising a printed surface;
a polyethylene terephthalate reinforcement layer comprising a bottom reinforcement layer surface, said polyethylene terephthalate reinforcement layer being in direct contact with said polyethylene terephthalate printing layer, said polyethylene terephthalate reinforcement layer being located adjacent to said polyethylene terephthalate printing layer, at least half of said bottom surface of said polyethylene terephthalate reinforcement layer comprising an embossed surface, said polyethylene terephthalate printing layer being laminated with said polyethylene terephthalate reinforcement layer to form a laminated polyethylene terephthalate printing layer and reinforcement layer, said laminated polyethylene terephthalate printing layer and reinforcement layer defining a tab;
a soft polymer foam layer, said polyethylene terephthalate reinforcement layer being arranged between said soft polymer foam layer and said polyehtylene terephthalate printing layer, said soft polymer foam layer being in direct contact with said polyethylene terephthalate reinforcement layer;
a polyethylene terephthalate isolation layer located adjacent to said soft polymer foam layer, said polyethylene terephthalate isolation layer being in direct contact with said soft polymer foam layer;
an electromagnetic induction heatable metal layer located adjacent to said polyethylene terephthalate isolation layer, said electromagnetic induction heatable metal layer being in direct contact with said polyethylene terephthalate isolation layer, said polyethylene terephthalate isolation layer being arranged between said electromagnetic induction heatable metal layer and said soft polymer foam layer, said polyethylene terephthalate isolation layer insulating a heat transfer from said electromagnetic induction heatable metal layer to said soft polymer foam layer; and
a peelable thermosensitive adhesive layer located adjacent to said electromagnetic induction heatable metal layer, said peelable thermosensitive adhesive layer being in direct contact with said electromagnetic induction heatable metal layer, said electromagnetic induction heatable metal layer being arranged between said peelable thermosensitive adhesive layer and said polyethylene terephthalate isolation layer, said peelable thermosensitive adhesive layer comprising an outer container engaging contact surface for engaging a container.
7. The environment-friendly foamed container closure laminate with embossed tabs as claimed in claim 6 , wherein said soft polymer foam layer is one of low density polyethylene, linear low density polyethylene, ethylene-vinylacetate copolymer, HDPE, PP and a mixture of LDPE and above mentioned polyolefin, and a layer thickness range is 50 to 400 microns and a foaming ratio is 1.1 to 5.0.
8. The environment-friendly foamed container closure laminate with embossed tabs as claimed in claim 6 , wherein the electromagnetic induction heatable metal layer is an aluminum foil with a thickness range between 5˜100 microns.
9. The environment-friendly foamed container closure laminate with embossed tabs as claimed in claim 6 , wherein the peelable thermosensitive adhesive layer is a hot melt adhesive film with a thickness range between 10˜80 microns.