IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0705876
(2003-11-13)
|
발명자
/ 주소 |
- Olofsson,Torsten
- Andr챔n,Sven
- B체rki,Monika
|
출원인 / 주소 |
- Tetra Laval Holding &
- Finance S.A.
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
6 인용 특허 :
8 |
초록
▼
The invention relates to a transparent gas barrier packaging laminate having a required bending stiffness, comprising outer layers of heat-sealable polyolefin, two polymer carrier layers each being coated with a SiOx gas barrier layer, wherein the two polymer carrier layers with SiOx layers are lami
The invention relates to a transparent gas barrier packaging laminate having a required bending stiffness, comprising outer layers of heat-sealable polyolefin, two polymer carrier layers each being coated with a SiOx gas barrier layer, wherein the two polymer carrier layers with SiOx layers are laminated to each other by means of an intermediate polymer layer, which in comparison to the other surrounding layers is relatively stiff and thicker. The required stiffness of the packaging laminate is obtained by the I-beam interaction between the two carrier layers and the intermediate distancing polymer layer. Preferably, the thickness of the intermediate polymer layer constitutes from about 30 to about 55% of the total thickness of the packaging laminate. The invention also relates to a packaging container such as a pouch or similar manufactured from the packaging laminate and to a method of manufacturing of the packaging laminate.
대표청구항
▼
What is claimed is: 1. Transparent gas barrier packaging laminate having a bending stiffness for packaging of liquid foods and drinks by a high speed, continuous process, comprising: first and second outside layers of heat-sealable olefin polymer; heat-sealable olefin polymer; a first gas barrier c
What is claimed is: 1. Transparent gas barrier packaging laminate having a bending stiffness for packaging of liquid foods and drinks by a high speed, continuous process, comprising: first and second outside layers of heat-sealable olefin polymer; heat-sealable olefin polymer; a first gas barrier coated carrier layer including a first gas barrier layer consisting of plasma enhanced chemical vapour deposited SiOx coated onto a first polymer carrier layer, where x is from 1.7 to 2. 0; a second gas barrier coated carrier layer including a second gas barrier layer consisting of plasma enhanced chemical vapour deposited SiOx, coated onto a second polymer carrier layer, where x is from 1.7 to 2.0; and an intermediate polymer layer laminated between the first and second gas barrier coated carrier layers, the intermediate polymer layer having a higher thickness relative to each of the first and second gas barrier coated carrier layers, and a higher stiffness relative to low density polyethylene, wherein a stiffness of each of the first and second polymer carrier layers interacts with the stiffness and the higher thickness of the intermediate polymer layer by an I-beam or sandwich effect to provide the bending stiffness, wherein a thickness of the intermediate polymer layer is from 40 to 60 μm, a thickness of each of the first polymer carrier layer and the second polymer carrier layer is from 8 to 15 μm, thicknesses of the first and second outside layers of heat-sealable olefin polymer are from 10 to 25 μm, and from 18 to 30 μm, respectively, and a total thickness of the packaging laminate is from 110 to 140 μm. 2. Transparent gas barrier packaging laminate according to claim 1, wherein the thickness of the intermediate polymer layer constitutes from 30 to 55% of a total thickness of the packaging laminate. 3. Transparent gas barrier packaging laminate according to claim 2, wherein the thickness of the intermediate polymer layer constitutes from 35 to 50% of the total thickness of the packaging laminate. 4. Transparent gas barrier packaging laminate according to claim 1, wherein the first or second polymer carrier layer is a film of oriented polyester or polyamide. 5. Transparent gas barrier packaging laminate according to claim 4, wherein the oriented polyester or polyamide is selected from mono-or biaxially oriented polyethyleneterephtalate (PET), mono-or biaxially oriented polyethylenenaphtenate (PEN) and mono-or biaxially oriented polyamide (PA). 6. Transparent gas barrier packaging laminate according to claim 1, wherein the intermediate polymer layer is a polymer selected from high density polyethylene or polypropylene. 7. Transparent gas barrier packaging laminate according to claim 1, wherein the intermediate polymer layer is an olefin polymer and the first and second polymer carrier layer is an oriented polyester or polyamide. 8. Transparent gas barrier packaging laminate according to claim 1, wherein the plasma enhanced chemical vapour-deposited SiOx gas barrier layers of the first and second gas barrier coated carrier layers are positioned in the laminate such that they are facing towards each other. 9. Transparent gas barrier packaging laminate according to claim 8, wherein the intermediate polymer layer is laminated to the layers of plasma enhanced chemical vapour-deposited SiOx by means of a binder layer. 10. Transparent gas barrier packaging laminate according to claim 9, wherein the binder layer comprises a graft copolymer of alkoxysilane and polyethylene. 11. Transparent gas barrier packaging laminate according to claim 1, wherein the plasma enhanced chemical vapor-deposited SiOx-layer has a thickness of 50 to 500 Å. 12. Transparent gas barrier packaging laminate according to claim 11, wherein the plasma enhanced chemical vapour-deposited SiOx-layer has a thickness is 80 to 300 Å. 13. Transparent gas barrier packaging laminate according to claim 1, wherein the first polymer carrier layer and the second polymer carrier layer have the same thickness. 14. Transparent gas barrier packaging laminate according to claim 1, wherein the thickness of the intermediate polymer layer is from 40 to 50 μm and the thickness of each of the first polymer carrier layer and the second polymer carrier layer is from 12 to 15 μm. 15. Transparent gas barrier packaging laminate according to claim 1, wherein the thickness of the intermediate polymer layer is from 50 to 60 μm and the thickness of each of the first polymer carrier layer and the second polymer carrier layer is from 8 to 12 μm. 16. Packaging container manufactured from a packaging material comprising a packaging laminate according to claim 1. 17. Transparent gas barrier packaging laminate according to claim 1, wherein the thickness of the intermediate polymer layer is from 40 to 55 μm.
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