Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

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
View PDF40 Cites 9 Cited by
  • 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 the invention, wherein pigment-coated base paper based on cellulose fibres, preferably on chemical pulp, is coated with a barrier layer preferably comprising polyvinyl alcohol.

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 of polyvinyl alcohol as a separate layer on a web is known to be difficult and energy consuming, as a leathery surface easily appears on the polyvinyl alcohol from where the water it contains is difficult to remove, resulting in the surface remaining uneven.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Coated base paper and a method for manufacturing coated base paper

Examples

Experimental program
Comparison scheme
Effect test

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...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Viscosityaaaaaaaaaa
Viscosityaaaaaaaaaa
Weightaaaaaaaaaa
Login to View More

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): D21H27/00D21H19/12D21H19/82D21HD21H17/36D21H17/37D21H27/06
CPCD21H17/36D21H17/37Y10T428/1476D21H27/00Y10T428/2839D21H19/12
Inventor MAKINEN, OLLI
Owner M REAL OYJ
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com