Coated base paper and a method for manufacturing coated base paper

a technology of coating base paper and coating paper, which is applied in the field of coating base paper and a manufacturing method of coating base paper, can solve the problems of affecting the quality of coating paper, the deterioration of coating paper, etc., and the surface remains uneven and the effect of reducing the number of defects

Inactive Publication Date: 2006-10-19
M REAL OYJ
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0014] It has been perceived that the problems occurring in base paper according to prior art can be avoided or significantly reduced by using the solution according to ...

Problems solved by technology

If holes are present in the base paper, adhesive from the adhesive layer may penetrate the silicone layer to the base paper, resulting in fissures and breaks in the web of the litter path and of the label laminate during subsequent processing.
The drying...

Method used

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  • Coated base paper and a method for manufacturing coated base paper

Examples

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example 1

[0021] Manufacture of coated base paper, coated with polyvinyl alcohol using a spray method Non-calendered paper Simkraft MF Specials having a grammage of 85 g / m2 and blade coating of 12.5 g / m2 was coated with a thin layer of polyvinyl alcohol by spray coating using a Helicoater device. Sample 1 was a reference sample not coated. In sample 2 polyvinyl alcohol Mowiol® having a degree of hydrolysis of 10 - 98, solid content of 5 %, viscosity of 64 cP, and the amount applicated being 1 g / m2 was used. In sample 3 polyvinyl alcohol Mowiol® having a degree of hydrolysis of 15 - 99, solid content of 5 %, viscosity of 27 cP, and the amount applicated being 1 g / m2 was used, and the same grade was used in sample 4, but then the solid content was 3 %, viscosity 18 cP, and amount applicated 0.5 g / m2. Pigment coating of the base paper was carried out as blade coating, followed by drying, then barrier layer coating using either spray coating or curtain coating, drying, and optional calendaring, w...

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Abstract

The object of the invention is coated base paper. According to the invention, it comprises cellulose fibres based pigment-coated paper having 1 to 5 barrier layers. The barrier layer comprises a barrier chemical selected from the group comprising polyvinyl alcohol, acrylate-based barrier latexes and their mixtures. The object of the invention is also a method for the manufacture of coated base paper. In the method, onto a pigment-coated paper based on cellulose fibres 1-5 barrier layers are applicated by using a method not contacting the web.

Description

FIELD OF THE INVENTION [0001] The object of the invention is coated base paper particularly suitable as base paper or release paper for labels, and a method for manufacturing coated base paper, wherein a barrier, i.e., protective layer is applicated to coated paper based on cellulose fibres. PRIOR ART [0002] Base papers, also known as release paper or backing papers, are used in the manufacture of label laminates and self-adhesive labels, and increasingly, also as packaging material for adhesive materials. Most commonly, base paper or release paper either is glassine-type transparent super-calendered and surface sized paper, or paper usually blade coated with pigments containing kaolin, for example, fine paper super-calendered as to be as impermeable as possible. Typical known prior-art laminate structures of pressure-sensitive labels are shown schematically in FIG. 1 appended. [0003] In FIG. 1, base paper 10 has been applicated with a release coating 20, most frequently comprising ...

Claims

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Application Information

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IPC IPC(8): D21H27/00D21H19/12D21H19/82D21HD21H17/36D21H17/37D21H27/06
CPCD21H17/36D21H17/37Y10T428/1476D21H27/00Y10T428/2839D21H19/12
Inventor MAKINEN, OLLI
Owner M REAL OYJ
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