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Device for applying an applied medium

A technology for processing substances and coatings, applied in fiber raw material processing, coatings, paper coatings, etc., can solve problems such as reducing system efficiency, and achieve the effect of reducing manufacturing difficulty and investment costs

Active Publication Date: 2021-07-09
ANDRITZ KUESTERS GMBH & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0020] However, the disadvantage here is that the osmotic solids content of starch is only around 25% at most, which greatly reduces the efficiency of the system

Method used

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  • Device for applying an applied medium
  • Device for applying an applied medium

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Embodiment Construction

[0034] Such as figure 1 As shown, the present invention relates to a method of indirect coating on at least one side of a moving product web 13, especially a paper or cardboard web, using at least one curtain coater 1.1, 1.2 with discharge nozzles 14.1, 14.2. Apparatus for handling substances 2.1, 2.2, especially starch. Arranged after said at least one curtain coater 1.1, 1.2 is a press nip N for creating a hydraulic pressure when the product web 13 passes through the press nip N, which results in the penetration of the treatment substance 2.1, 2.2 Go to the product net 13. The press nip N is preferably a hard nip, formed by two hard rolls (ie applicator rolls 7, 8).

[0035] The at least one curtain coater 1.1, 1.2 is designed to discharge a treatment substance 2.1, 2.2 having a solids content of between 10% and 40% in at least one layer. In order to enhance the penetration of the treatment substance 2.1, 2.2 into the product web 13, the at least one press nip N is equipp...

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PUM

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Abstract

Device for applying a treatment substance (2.1, 2.2), in particular starch, on at least one side of a running product web (13), in particular a paper or board web, by means of a least one curtain coater (1.1, 1.2) having a discharge nozzle (14.1, 14.2) and at least one press nip (N) following the curtain coater (1.1, 1.2) for forming a hydraulic pressure when the product web (13) passes through a press nip (N) which is formed by one of two rotating press rolls and which causes the treatment substance (2.1, 2.2) to penetrate into the product web (13), wherein the at least one press nip (N) is equipped with at least one heated applicator roll (7, 8) as a press roll to increase the penetration of the treatment substance (2.1, 2.2) into the product web (13), and at least one of the two press rolls (8) is designed with a fixed or adjustable crown (16) for the adjustment of a line load in a range of 20 to 200 kN / m.

Description

technical field [0001] The invention relates to a device for applying a treatment substance to at least one side of a moving product web. Background technique [0002] The use of treating substances, especially starch, has long been the standard method of improving the moisture resistance of product webs as well as increasing their surface and overall strength. The treatment substance can be added directly to the pulp suspension, or can be sprayed onto the wet wire in the wire section of the paper machine. The treatment substance is most preferably applied after the press section and the predrying section. In particular, liquid film coating devices for coating treatment substances are known in addition to sizers and film presses. As production speeds increase, there is a need in the industry to provide more efficient machines for applying treatment substances to moving product webs. [0003] DE 100 12 344 A1 discloses a known device for coating one or both surfaces of a p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H23/48
CPCD21H23/48D21H23/56D21H19/82D21H19/84D21F3/045D21H19/54
Inventor E.戴维登科A.佩施
Owner ANDRITZ KUESTERS GMBH & CO KG