A pigment coated paperboard adapted for sterilizable packages

A technology for coating cardboard and pigments, applied in packaging paper, pigmented coatings, packaging, etc., can solve the problems of not improving hydrophobicity and achieve good adhesion

Inactive Publication Date: 2012-03-14
BILLERUDKORSNES SKOG & IND AB
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Addition of 0.5-1.5 kg / t rosin size is thought to improve resistance to hydrogen peroxide, but it did not improve hydrophobicity as well

Method used

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  • A pigment coated paperboard adapted for sterilizable packages
  • A pigment coated paperboard adapted for sterilizable packages

Examples

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Embodiment Construction

[0038] The invention is now described by the illustration of embodiments given by way of example only, with the understanding that these embodiments do not constitute a limitation of the scope of protection defined in the claims.

[0039] The pigment-coated paperboard of the present invention can be produced as a two-ply (two-ply) board with a top layer of bleached kraft pulp (a mixture of 50% softwood and 50% by weight hardwood pulp) and bleached or unbleached softwood Bottom layer of pulp. As an alternative to the bottom layer, it is possible to combine bleached / unbleached softwood pulp with bleached or unbleached hardwood pulp, or even to use only bleached / unbleached hardwood pulp. A portion (eg 50% by weight) of the softwood pulp can be treated in the HC refiner to increase the flexibility of the fibres, which is believed to reduce the tendency to crack during board conversion. The beating level of all three pulps should be at least 21° SR.

[0040] The bleached top laye...

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Abstract

The invention describes a pigment coated paperboard adapted for sterilizable packages and comprising one or more layers, with a pigment coated top layer of bleached kraft pulp. The paperboard has a density in the range of 700 to 870 kg / m 3 and is hydrophobic from a sizing agent treatment of each layer, wherein the pigment coating comprises a pigment, a binder, and a rheology modifier, and wherein the pigment comprises at least 50 weight% calcium carbonate, the binder comprises an acrylic co-polymer, and the rheology modifier comprises an acrylic co-polymer. According to the invention is also defined a corresponding method and use of the paperboard for producing a package, as well as a package.

Description

technical field [0001] The present invention relates to new quality pigment coated paperboard for packaging having a top ply of bleached sulphate pulp. The invention also relates to packaging comprising pigment-coated paperboard and the use of pigment-coated paperboard for the production of packaging. The invention also relates to a method for the production of paperboard. [0002] Pigment coatings are applied over the bleached layer of kraft pulp. The advantages of the new quality are excellent resistance to water penetration as well as low surface roughness, good printability. The paperboard of the present invention has a top surface suitable for eg flexographic printing, offset printing and lithographic printing, and said paperboard is preferably used for producing different types of packaging, such as food packaging. The paperboard is suitable for use in packaging processes where steam is used to sterilize packages and / or food products, eg to co-sterilize packages and t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B65D65/42B32B29/00B65B55/10D21H19/36
CPCD21H19/385D21H21/16Y10T428/31895B32B29/005B32B29/06B65D65/42D21H19/36B32B2255/12
Inventor 约翰·拉松莱因·阿克斯贝里海伦娜·图韦松
Owner BILLERUDKORSNES SKOG & IND AB
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