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Method for coating paper mill cylinders and cylinders thus obtained

A technology of coating and coating film, which is applied in the direction of papermaking, papermaking machines, textiles and papermaking, etc., can solve the problems of increased noise, irregular coating, uneven coating, etc., achieve effective heat exchange and wear resistance , good bonding effect

Inactive Publication Date: 2018-03-02
A CELLI PAPER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, this method may alter the Yankee coating as some of the chemicals used may transfer to the surface of the Yankee, making the coating more fragile and irregular
Also, the coating becomes uneven, which can increase noise
[0007] These systems are designed to improve the characteristics of the paper coating to be dried on the surface of the Yankee, without adequate consideration of the effect of the surface characteristics of the Yankee on which the paper layer is to be dried
In addition, the economical and economic advantages brought about by the modular development of the Yankee dryer cylinder surface for wear resistance, thermal conductivity, adhesion and grinding performance have not been systematically studied

Method used

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  • Method for coating paper mill cylinders and cylinders thus obtained
  • Method for coating paper mill cylinders and cylinders thus obtained
  • Method for coating paper mill cylinders and cylinders thus obtained

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0090] Nanocomposite R1-A : 0.045g (1.5% by weight relative to the uncrosslinked epoxy resin) sodium montmorillonite (sold by Laviosa Chimica Mineraria SpA, Italy) and 1ml solvent (acetone) were added to 3g epoxy resin EPOSIR 7120 (supplied by SIR Industriale SpA, Italy). Then, 0.531 g of hardener (diethylenetriamine) was added to the above filled epoxy resin. The samples were kept at room temperature for 2 hours, then at 50°C for 2 hours, then at 70°C for 2 hours. The Rockwell hardness of the sample after crosslinking is equal to 62.1HRC.

Embodiment 2

[0092] Sample R1-B : 0.09 g (3% by weight relative to the uncrosslinked epoxy resin) of sodium montmorillonite (MMT, Laviosa) and 1 ml of solvent were added to 3 g of epoxy resin EPOSIR 7120. Then, 0.531 g of hardener (diethylenetriamine) was added to the above filled epoxy resin. The samples were kept at room temperature for 2 hours, then at 50°C for 2 hours, then at 70°C for 2 hours. After cross-linking, the sample had a Rockwell hardness of 62.1 HRC; the sample had been deposited on a spatula to a thickness of 1 mm.

Embodiment 3

[0094] Nanocomposite R1-C : 0.045 g (1.5% by weight relative to the epoxy resin) of multi-walled carbon nanotubes (MWCNT) Baytubes C150P (sold by BAYER MATERIAL-SCIENCE AG, Germany) and 1 ml of solvent were added to 3 g of epoxy resin EPOSIR 7120. Then, 0.531 g of hardener (diethylenetriamine) was added to the above filled epoxy resin. The samples were kept at room temperature for 2 hours, then at 50°C for 2 hours, then at 70°C for 2 hours. After crosslinking, the Rockwell hardness of the sample was 60.3HRC.

[0095] In addition to the three examples listed in the table, the following samples were also prepared:

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Abstract

A layer of polymer resin, typically a thermoset reactive two-component resin, is applied onto a Yankee cylinder (3). The resin is cross-linked in order to form a continuous coating layer or film, containing a charge of micro- and / or nano-sized particles, in order to increase hardness and thermal conductivity of the resin.

Description

[0001] manual technical field [0002] The present invention relates generally to the field of papermaking machinery, in particular for wet-laid manufacturing in which a layer of cellulose fibers suspended in water is subsequently dewatered. In particular, it is described herein to provide a protective coating for surfaces intended to come into contact with layers of cellulose paper, especially tissue paper, for example in parts of machines and equipment for removing water from layers of cellulose fiber pulp Methods. [0003] Some embodiments described herein refer to dryers for drying layers of cellulosic fibers, so-called Yankee dryers. If not otherwise stated, "Yankee dryer" generally refers to a dryer cylinder over which a layer of cellulosic fibers is driven to remove moisture therefrom. Background technique [0004] Paper is usually manufactured by a wet-laid process. The cellulose fiber pulp is suspended in water together with other components such as dyes, moistu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21F5/18
CPCD21F5/181B05D3/007C08K3/04C08K3/22C08K3/346C08K3/36C08K3/38C08K2003/2227C08K2003/385C09D163/00C08K3/041C08K3/042
Inventor S·索伦蒂诺M·切利G·安东尼尼
Owner A CELLI PAPER
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