Printed polyester film based laminate, method of making and application thereof
The present disclosure provides a polyester film based laminate comprising: an outer polyethylene layer; a core layer of a printed polyester film; and an inner polyethylene layer; an article made of said laminate. The printing on the said polyester film based laminate can be a reverse printing. The present disclosure further provides a method for producing a polyester film based laminate.
1. A polyester film based laminate, consisting of:
an outer polyethylene layer of 70:30 to 30:70 low density polyethylene (LDPE) and a linear low density polyethylene (LLDPE);
a polyethylene layer of low density polyethylene (LDPE);
a first primer layer of a polyethylene imine (PEI);
a core layer of a printed polyester film of polyethylene terephthalate (PET) printed with an ink wherein the core layer is coated with a silane layer;
a second primer layer of a polyethylene imine (PEI);
a polyethylene extrusion layer of low density polyethylene (LDPE); and
an inner polyethylene layer of 70:30 to 30:70 low density polyethylene (LDPE) and a linear low density polyethylene (LLDPE);
wherein the ink used for the printing is vinyl ink having particle size of pigments less than 5 micron or polyurethane ink (PU).
2. The laminate as recited in claim 1 , wherein said core layer of a printed polyester film is printed by reverse printing technique or surface printing technique.
3. The laminate as recited in claim 2 , wherein the said reverse printing technique of the polyester film is by gravure printing technique.
4. The laminate as recited in claim 1 , wherein the linear low density polyethylene (LLDPE) has a density in the range of 0.912 g/cc to 0.940 g/cc, and the density of low density polyethylene (LDPE) is in the range of 0.918 g/cc to 0.935 g/cc.
5. The laminate as recited in claim 1 , wherein the said outer polyethylene layer is printed.
6. A tube or a lamitube made of the laminate as recited in claim 1 .
7. A method for producing a polyester film based laminate as recited in claim 1 comprising:
(A) receiving a polyester film;
(B) coating said polyester film with a silane layer;
(C) printing a print mark on said polyester film coated with a silane layer from Step (B) using a suitable ink;
(D) coating said polyester film with a polyethylene imine primer on both sides; and
(E) performing extrusion lamination with said polyester film sandwiched between said polyethylene layers, to obtain the polyester film based laminate.
8. The method as recited in claim 7 , wherein said printing is a surface printing selected from letterpress printing, flexography printing, and hologram printing.
9. The method as recited in claim 7 , wherein the ink used for printing is vinyl ink having particle size of pigments less than 5 micron or polyurethane ink (PU).
10. The method as recited in claim 7 , wherein said outer polyethylene layer is printed by letterpress or flexography printing process.
11. A polyester film based laminate, consisting of:
(A1) an outer polyethylene layer of 70:30 to 30:70 of low density polyethylene (LDPE) and linear low density polyethylene (LLDPE) having a thickness of 175 μm;
(A2) a polyethylene extrusion layer of low density polyethylene (LDPE) having a thickness of 30 μm;
(A3) a first primer layer of a polyethylene imine (PEI) having a thickness of 0.1 μm;
(B1) a core layer of printed polyester film, of polyethylene terephthalate having a thickness of 12 μm;
(C3) a second primer layer of a polyethylene imine (PEI) having a thickness of 0.1 μm;
(C2) a polyethylene extrusion layer of low density polyethylene (LDPE) having a thickness of 30 μm; and
(C1) an inner polyethylene layer of 70:30 to 30:70 of low density polyethylene (LDPE) and linear low density polyethylene (LLDPE) having a thickness of 175 μm.