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Coating formulation for offset paper and paper coated therewith

A technology of offset printing and coated paper, which is applied in the field of coated paper, can solve problems such as unstable hydrophilic properties, and achieve the effects of reducing ink wiping, reducing costs, and reducing costs

Inactive Publication Date: 2010-09-15
SAPPI NETHERLANDS SERVICES +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this case, it is clear that the hydrophilic properties imparted are very unstable

Method used

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  • Coating formulation for offset paper and paper coated therewith
  • Coating formulation for offset paper and paper coated therewith
  • Coating formulation for offset paper and paper coated therewith

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Embodiment Construction

[0090] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

[0091] Referring to the accompanying drawings, the accompanying drawings are intended to illustrate preferred embodiments of the present invention rather than limit the present invention, figure 1 A schematic diagram of coated printing paper is shown. The coated printing paper 4 is coated on both sides with layers, wherein these layers constitute the image-receiving coating. In this particular case, a top coat 3 is provided, which forms the outermost coat of the coated printing paper. Below this facing layer 3 a second layer 2 is provided. In some cases, beneath this second layer is an additional third layer (not shown), which may be a suitable coating but which may also be a sizing layer.

[0092] Usually, the basis weight of this type of coated printing paper is 80-400g / m 2 range, preferably 100-250g / m 2 within range. The total dry weight of the coating of the surface layer is, for example, 3-25g / m 2 range, pre...

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Abstract

Coated paper for offset printing comprising at least on one side a top coating layer with improved ink scuff behaviour, said top coating layer comprising a pigment part, the 100 parts in dry weight thereof comprising in the range of 2 - 40 parts in dry weight of a fine particulate, preferably organosilane surface-treated Phyllosilicate pigment like (as pure as possible) Talcum, a binder part of 2- 20 parts in dry weight of binder and optionally additives in the range of 0 - 8 parts in dry weight.

Description

technical field [0001] The present invention relates to coated papers for offset printing comprising, at least on one side, a specific topcoat to be printed. The invention also relates to a process for the manufacture of such coated papers and to the specific use of talc pigments for the manufacture of such papers. Background technique [0002] The present invention relates to the preparation of paper coating formulations comprising talc. The term "talc" means a true mineralogical talc comprising at least 60%, preferably at least 80%, and most preferably at least 90% by weight (i.e. theoretical molecular composition 3MgO. 2 ·H 2 O or Mg 3 [Si 4 o 10 (OH) 2 ] of hydrous (or hydrated) magnesium silicate) minerals. The commercially available talc minerals called "talc" are usually composed of (only) true layered mineralogy talc and associated layered minerals such as chlorite, which also belong to the large class of silicate phyllosilicates class and the theoretical mol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B41M5/52D21H19/40D21H19/42
CPCB41M5/5218Y10T428/259Y10T428/249987
Inventor 让-皮埃尔·黑纳肯尼思·B·朱伊特罗纳德·万德拉尔苏珊·E·斯诺
Owner SAPPI NETHERLANDS SERVICES