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High barrier packaging laminate, method for manufacturing of the packaging laminate and packaging container

A technology for packaging laminated materials and barrier layers, applied in packaging, household packaging, packaging food, etc.

Active Publication Date: 2012-05-23
TETRA LAVAL HLDG & FINANCE SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] Therefore, the object of the present invention is to overcome or alleviate the aforementioned problems during the production of a foil-free paper or cardboard packaging laminate for long-term aseptic packaging of liquid or wet food products.

Method used

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  • High barrier packaging laminate, method for manufacturing of the packaging laminate and packaging container
  • High barrier packaging laminate, method for manufacturing of the packaging laminate and packaging container
  • High barrier packaging laminate, method for manufacturing of the packaging laminate and packaging container

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0140] 2 x 1 g / m 2 An aqueous solution of dissolved and dispersed PVOH and 30 wt% bentonite clay (calculated on dry matter) as a gas barrier component liquid film is applied to a liquid film with approximately 50 g / m 2 The surface area weight of tissue paper is used to produce packaging laminates.

[0141] Aqueous solution gas barrier composition preparation: about 1-5 wt% of an aqueous dispersion of exfoliated layered montmorillonite particles (Kunipia F from Kunimine Kogyo) having an aspect ratio of about 50-5000 was mixed with about 10 wt% of PVOH (Mowiol 15-99, with a degree of saponification above 99%), an aqueous solution was mixed at 60-90° C. for 1-8 hours. Dispersions of exfoliated layered mineral particles can be stabilized by stabilizer additives. Alternatively, the layered mineral particles may be exfoliated directly in a PVOH solution at 60-90°C during 1-8 hours.

[0142] The inside half of the first paper layer material with liquid film coating gas barrier is ...

Embodiment 2

[0147] In tests where similar liquid gas barrier compositions were coated onto different paperboard grades, it was further seen that widely varying oxygen transmission results were obtained. It is not entirely understood why different paperboards lead to different oxygen barrier results. Different paperboards as above were with 2 x 1 g / m of montmorillonite 2 PVOH coating and then further laminated with PE inner side or with metallized PE film, respectively, as described above. The oxygen transmission on the flat packaging laminate was measured at 23°C and 50% relative humidity. The following boards were coated (numbered from 1 to 8):

[0148] 1. 260mN

[0149] 2. 320mN

[0150] 3. 260mN

[0151] 4. 150mN

[0152] 5. 80mN

[0153] 6. Stora Enso 260mN

[0154] 7. International Paper 260mN

[0155] 8. Klabin 260mN

[0156] From Figure 7 As can be seen in the graph of the oxygen transmission value (cc / m 2 / day / atmospheric pressure (100% oxygen, 23°C, 50% rel...

Embodiment 3

[0166] By way of this example, a gas barrier layer comprising inorganic particles is combined with an inner side polyolefin-based layer having inorganic filler particles as a separation layer in a packaging laminate when coated onto a single paperboard in a laminate. The synergistic water vapor barrier effect resulting from the combination of water vapor barrier layers is shown.

[0167] According to the invention, a gas barrier composition is coated onto the first paper layer. A laminated pre-made inside with a moisture vapor barrier layer and an inside layer is laminated to a second paperboard layer in the final step. The barrier effect of the laminates of the present invention will be at least as good, or possibly even better, than according to the examples below.

[0168] The 2 x 1 g / m 2 An aqueous solution of dissolved and dispersed PVOH and 30 wt% bentonite clay (calculated on dry matter) as a gas barrier component liquid film was applied to the The company's 320mN C...

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Abstract

The invention relates to a non-foil packaging laminate for liquid food packaging comprising a first layer of paper, which first paper layer is situated towards the inner side of the laminated packaging material and a second layer of paper situated towards the outer side of the laminated packaging material, said first and second paper layers being laminated to each other by means of a first intermediate bonding layer in a sandwich structure, the packaging laminate further comprising a gas barrier coating layer, coated onto the inner side of the first paper layer by liquid film coating of a liquid gas barrier composition onto said first paper layer and subsequent drying, the liquid composition containing a polymer binder dispersed or dissolved in an aqueous or solvent medium, and a further barrier layer towards water vapour laminated and bonded to the barrier- coated inside of the first paper layer. The invention also relates to a method for manufacturing of the packaging laminate and to a packaging container that is made from the packaging laminate.

Description

technical field [0001] The present invention relates to a foil-free, high barrier, paper-based packaging laminate for the packaging of liquid food or beverages, especially suitable for fruit juices, said packaging laminate further comprising a barrier layer and an outermost A heat-sealable thermoplastic polymer layer and an innermost heat-sealable thermoplastic polymer layer. The invention also relates to a method of manufacturing said packaging laminate and to a packaging container produced from said packaging laminate. Background technique [0002] Packaging containers of the single-use, disposable type for liquid food products are usually manufactured from paperboard or carton-based laminates. A packaging container so ubiquitous is named after Tetra Brik The trademark is sold in the market and is mainly used for aseptic packaging of liquid foods such as milk and juice, which can be stored in a long-term environment after sale. The packaging material in such known pack...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/00B32B7/022
CPCB32B27/00B32B7/12B32B27/08B32B27/10B32B27/32B32B29/005B32B2255/10B32B2255/12B32B2255/205B32B2255/26B32B2255/28B32B2264/10B32B2307/31B32B2307/50B32B2307/718B32B2307/7242B32B2307/7244B32B2307/7246B32B2307/7248B32B2307/734B32B2439/70Y10T428/277Y10T428/1348Y10T428/31855Y10T428/31725Y10T428/31703Y10T428/31993B32B7/022
Inventor 尼尔斯·托夫特马茨·本特马尔米卡埃尔·柏林
Owner TETRA LAVAL HLDG & FINANCE SA
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