Process for manufacturing coated substrates

A substrate and coating technology, which is applied in the directions of copying/marking methods, devices for coating liquids on surfaces, and papermaking, etc., can solve the problems of increasing extra cost, inability to effectively retain solubility and fine properties, and hindering dehydration of paper webs.

Active Publication Date: 2014-02-26
OMYA INT AG
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  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

For example, nanofibrillar or microfibrillar cellulose is well known for use as a coating material in papermaking and in the wet end, but is expensive and potentially uneconomical to use in typical wet end applications. bound
[0004] The use of nanofibrillar cellulose or microfibrillar cellulose in the wet end of paper / board manufacturing severely hinders the dewatering of the paper web, thereby adding additional costs when drying or slowing down the paper machine, and if used as a surface treatment agent, nanofibrillar Fibrillar or microfibrillar cellulose exhibits poor coating holdout
[0005] The solubility and delicate nature of this material prevents it from being effectively retained, and when retained, it is generally not effectively applied within the spatial distribution of the paper fiber matrix

Method used

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  • Process for manufacturing coated substrates
  • Process for manufacturing coated substrates
  • Process for manufacturing coated substrates

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0128] 1. Materials

[0129] base : Standard uncoated 80 gm-2 wood-free copy paper (PlanoJet; Papyrus AB, Sweden).

[0130] mineral material : surface-reacted natural ground calcium carbonate (Omyajet B6606; Omya AG, Oftringen, Switzerland; see figure 1 ); weight median particle size d 50 =2.70μm (Sedigraph5100); specific surface area=56m 2 / g; in the form of an aqueous slurry with a solids content of 50% by weight with respect to the mineral material;

[0131] The mineral material was mixed and diluted with 10 wt% styrene acrylate latex binder (Acronal S360D; BASF, Ludwigshafen, Germany) based on the amount of mineral material to obtain a total solids content of 40 wt%.

[0132] polysaccharide material :

[0133] PM1: ARBOCEL MF40-10 (J. Rettenmeyer und GmbH & Co. KG, Rosenberg, Germany), nanodispersed cellulose with a solids content of 10 wt%, a median particle (fiber) diameter figure 2 ).

[0134] PM2: Nanofibrillar cellulose gel formed using dissolution dis...

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Abstract

The present invention relates to a process for manufacturing coated substrates by providing a substrate, providing at least one mineral material, providing a polysaccharide material comprising one or more polysaccharides, coating the substrate with the at least one mineral material, and coating the resulting pre-coat layer of mineral material with the gel comprising one or more polysaccharides, as well as the coated substrate obtained by this process and its use.

Description

technical field [0001] The present invention relates to a method for producing a coated substrate as well as the coated substrate obtained by this method and its use. Background technique [0002] It is a continuing goal to improve the properties of certain substrates, such as in papermaking, to provide paper with improved surface properties, such as in terms of surface smoothness and uniformity, and structural stability. [0003] Significant stiffness advantages can be achieved, for example, by using polysaccharides as fillers or coatings. For example, nanofibrillar or microfibrillar cellulose is well known for use as a coating material in papermaking and in the wet end, but is expensive and potentially uneconomical to use in typical wet end applications. bound. [0004] The use of nanofibrillar cellulose or microfibrillar cellulose in the wet end of paper / board manufacturing severely hinders the dewatering of the paper web, thereby adding additional costs when drying or ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B41M5/50B41M5/52B41M5/42
CPCB41M2205/38B41M5/5236B05D7/54B41M5/50B41M5/426D21H19/80B41M5/506H02S20/23H02S20/30Y02E10/47F24S25/61F24S2025/018F24S2025/806F24S25/11F24S25/10F24S2025/02F24S25/70Y10T428/31993Y10T428/31971Y02E10/50Y02B10/10B41M5/5218B41M5/42
Inventor P·A·C·甘恩C·J·里奇韦M·申克尔
Owner OMYA INT AG
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