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Coated printing sheet and process for making same

A printing paper and coating technology, applied in the field of printing paper, can solve the problems of reducing printing speed, moisturizing ink, low gloss value of printing surface, and bruising.

Inactive Publication Date: 2005-10-26
SAPPI NETHERLANDS SERVICES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the ink is fixed too quickly, the viscous ink is easily absorbed into the paper too quickly, resulting in partial napping of the paper surface during printing (destroying the cohesion within the printed paper, known in the art as fuzzing), ink staining Or problems related to the low gloss value of the printing surface
On the other hand, if the ink is set too slowly, it takes too much time to dry the ink and the printing speed must be reduced accordingly

Method used

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  • Coated printing sheet and process for making same
  • Coated printing sheet and process for making same
  • Coated printing sheet and process for making same

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Embodiment Construction

[0044] Referring to the accompanying drawings, the purpose of which is to illustrate preferred embodiments of the invention and not to limit it, figure 1 A cut sheet is shown, which represents a first embodiment of the printed sheet of the invention. The printing paper comprises a substrate 5, in which figure 1 Only the surface layer is shown. The first layer on the substrate 5 is a possibly colored size layer 4 , which is then followed by a third layer 3 , a second layer 2 and a skin layer 1 . figure 1 Only one side of the printed paper is shown, which is usually the case if both sides of the printed paper are coated, figure 1 The structure shown in is also present on the bottom of the printed paper with layers in the order figure 1 A mirror image of the order shown.

[0045] In the following, each layer and its components will be described in detail, and finally the paper manufacturing method and performance analysis of the finished printing paper will be explained. In ...

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Abstract

A printing sheet is described comprising a substrate and, on at least one side of the substrate, an image receptive coating layer with a cumulative porosity volume of pore widths below 200nm as measured using nitrogen intrusion methods of more than 0.006 cm<3> per gram paper. In particular in the context of printing sheets with high-gloss this particular porosity distribution leads to a quick and easily adjustable ink setting behaviour. Additionally a method for manufacturing such a printing sheet is described using organic, i.e. polymer and inorganic particulate pigments of fine particle characteristics.

Description

technical field [0001] The present invention relates to a printing paper comprising a substrate and an image receptive coating on at least one side of the substrate. It also relates to a production method and the use of the printing paper. Background technique [0002] Especially in the field of high-quality offset printing, such as fine copy and gloss paper printing magazines, etc., it is required that the paper exhibits high gloss, is easy to print, has fast ink drying ability and has high bulk and hardness at the same time, that is, Has low density. [0003] In the manufacture of such paper, the finishing operation is usually a calendering process in which the web is passed through a nip formed between one or more pairs of rolls, thereby flattening the web to form Smooth and glossy finish. At the same time, reduce the thickness of the web and compact the web. Calendering generally increases density and the final paper product will instead exhibit a lower hardness sinc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B41M5/00B41M5/52D21H19/38D21H19/40D21H19/76D21H19/82D21H21/52
CPCB41M5/5254B41M5/52D21H21/52D21H19/40B41M5/5236D21H19/76B41M5/5218D21H19/82B41M5/5227B41M5/5281D21H19/385B41M5/00D21H19/38
Inventor 让-皮埃尔·黑纳雅克·德·容贝尔特·斯科尔特
Owner SAPPI NETHERLANDS SERVICES
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