Method and device for producing an at least essentially wood-free coated paper web

A coating method, groundwood technology, applied in papermaking, papermaking machines, textiles and papermaking, etc., can solve the problems of time loss, impossibility of full utilization, etc., and achieve the effect of reducing web stress

Inactive Publication Date: 2010-03-24
VOITH PATENT GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to this significant loss of time it is not possible to fully utilize the maximum speed capability of the paper machine

Method used

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  • Method and device for producing an at least essentially wood-free coated paper web
  • Method and device for producing an at least essentially wood-free coated paper web
  • Method and device for producing an at least essentially wood-free coated paper web

Examples

Experimental program
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Embodiment Construction

[0051]figure 1 An exemplary embodiment of an apparatus 10 for producing an at least substantially groundwood-free coated paper web is shown in schematic diagram form, with a wire section 12, a press section 14, a predryer section 18 , a device 18 for gluing, a post-drying section 20 , a calender or pre-calender 22 , a coloring device 24 , a drying device 26 and a roller 28 .

[0052] If according to figure 1 It can be seen that the gluing device 18 and the coloring device 24 are respectively, for example, film coating devices.

[0053] After the drying device 26 in the X zone and before the roller 28, two non-contact coating devices 30, 32 for two-sided coating are preferably arranged as the last coating device. Here, these last coating devices can in particular each be implemented as curtain coating devices.

[0054] For the whole online operation scheme, the paper web area with the best quality is the mass per unit area of ​​60g / m 2 to about 200g / m 2 Between especially a...

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Abstract

The invention relates to a method for producing an essentially wood-free coated paper web. According to said method, at least one double coating is applied to at least one side of the web, and the last layer of coating is applied by means of a contact-free application method. The invention also relates to a corresponding device for producing an at least essentially wood-free coated paper web.

Description

technical field [0001] The present invention relates to a method and apparatus for making an at least substantially woodfree coated or similarly coated paper web. Background technique [0002] In the hitherto disclosed method of producing an at least substantially groundwood-free or approximately groundwood-free recoated paper web, at higher speeds of more than 1400 m / min the following settings are successively A step of: [0003] gap forming machine [0004] Press section [0005] Pre-calender with soft nip, hard nip or wide nip extending in the direction of web movement in the pre-drying section [0006] MSP press (MSP = metered size press) for sizing or pre-coating [0007] Blade coater [0008] Blade coater [0009] In-line or off-line multiple nip calenders for finishing [0010] A significant disadvantage of the hitherto known solutions is that the overall efficiency is significantly reduced by the doctor blade coating unit. Thus, in a typical process with off-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21F9/00D21F11/00D21G1/00D21H23/24D21F3/02
CPCD21F3/045D21H23/48D21H23/50D21H25/14D21F11/00D21H19/82D21H23/24D21F9/003D21G1/00D21H21/16
Inventor 约翰·伯格曼
Owner VOITH PATENT GMBH
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