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A packaging laminate for a retortable packaging container and retortable packaging container made therewith

A packaging container and stacking technology, applied in household packaging, household containers, packaging, etc.

Inactive Publication Date: 2006-09-20
TETRA LAVAL HLDG & FINANCE SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

While these two prior art methods solve the inherent problems of moisture and liquid penetration, they require at least one additional operation and additional equipment associated therewith during the packaging laminate production process

Method used

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  • A packaging laminate for a retortable packaging container and retortable packaging container made therewith
  • A packaging laminate for a retortable packaging container and retortable packaging container made therewith
  • A packaging laminate for a retortable packaging container and retortable packaging container made therewith

Examples

Experimental program
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Embodiment Construction

[0023] Detailed Description of Preferred Embodiments

[0024] figure 1 A schematic cross-sectional view of a packaging stack in the simplest embodiment of the invention. The packaging stack, indicated by reference numeral 10, comprises a base or core layer 11 of paper or cardboard, and liquid-tight outer layers 12 and 13 of heat-sealable plastic on either side of the base layer 11 .

[0025] Aqueous dispersion or The emulsion performs sizing to make the base layer 11 hydrophobic. In a particularly preferred embodiment, the base layer 11 is rendered hydrophobic by using an aqueous dispersion or emulsion of an alkyl ketene dimer having 18 carbon atoms at its fatty tail.

[0026] The amount of alkyl ketene dimer in the base layer 11 can vary, but is preferably at least about 0.25% by weight based on the dry weight of the base layer. However, when the packaging laminate 10 of the present invention is intended to be used in food-related situations, the amount of alkyl ketene di...

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PUM

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Abstract

A packaging laminate for a retortable packaging container of the type which is produced by fold forming and thermosealing of a web or a prefabricated blank of the packaging laminate. The packaging laminate (10) includes a base layer (11) of paper or paperboard which has been rendered hydrophobic by stock sizing. The base layer (11) is preferably rendered hydrophobic by stock sizing by means of an aqueous dispersion or emulsion of an alkyl ketene dimer or mixture of alkyl ketene dimers with a different number of carbon atoms in their respective fat tails. Most preferably, the base layer (11) is rendered hydrophobic by stock sizing by means of an aqueous dispersion or emulsion of an alkyl ketene dimer containing 18 carbon atoms in its fat tail. The quantity of alkyl ketene dimers is suitably at least approx. 0.25 weight %, preferably 0.25 - 0.4 weight %, most preferably approx. 0.4 weight %, calculated on the dry weight of the base layer (11).

Description

technical field [0001] The present invention relates to a packaging laminate for retortable packaging containers, the laminate comprising a paper or paperboard base layer. Background technique [0002] International Patent Application Publication No. WO 97 / 02140 discloses a packaging laminate of the type described above. Prior art packaging laminates have a rigid but foldable base or core of paper or paperboard, and outer layers of liquid-tight, heat-resistant plastic on either side of the base. A gas barrier layer, for example aluminum foil, may also be provided between the base layer and the outer layer of one of the two plastic outer layers, thus also rendering the packaging laminate gas, in particular oxygen, permeable. [0003] International patent applications WO97 / 02181 and WO98 / 18680 also describe similar packaging stacks. [0004] The final packaging container is manufactured from the prior art packaging stack using modern packaging and filling machines which util...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B29/06B65D65/40D21H17/17D21H21/16D21H27/10B32B3/04B32B27/00B32B27/10D21H19/84D21H27/30
CPCD21H27/10D21H21/16B32B3/04D21H17/17B32B29/06D21H19/84B32B27/10Y10T428/1303B32B7/12B32B2255/12B32B2255/26B32B2307/7244B32B2307/73B32B2317/12B32B2323/043B32B2323/046B32B2323/10B32B2367/00B32B2439/70
Inventor L·西克尔特P·弗洛贝里
Owner TETRA LAVAL HLDG & FINANCE SA