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Method of producing paper or paperboard and paper maker or paperboard maker

A technology for paper machines and cardboard machines, applied in the directions of paper machines, paper machines, wet ends of paper machines, etc., can solve the problems of paper breaking running capacity, increase machine length and investment costs, increase the demand for drying energy, etc., and achieve savings. Equipment cost, reduced number of breakages, increased density

Inactive Publication Date: 2007-02-07
VALMET OY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When water-soluble substances are suitable for paper, drying is required, which not only increases the length of the machine and the cost of investment, but also increases the demand for drying energy
Also, the paper machine must provide an open draw, especially when running at high speeds to produce lighter weight paper products, which may cause sheet breakage and other runnability problems

Method used

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  • Method of producing paper or paperboard and paper maker or paperboard maker
  • Method of producing paper or paperboard and paper maker or paperboard maker
  • Method of producing paper or paperboard and paper maker or paperboard maker

Examples

Experimental program
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Embodiment Construction

[0048] Such as figure 1 As shown, the stock is sent from the headbox 100 to the wire section 200, with a gap former 250 dewatering from both sides, followed by a press section 300. In the press section 300, at least one press is in the extended nip, preferably a shoe press, to preserve bulk and reduce double-sidedness during dewatering of the sheet. In the press section as shown, the first nip is a roll nip 350 and the second nip is an extension nip 360 . The web W passes from the press section 300 to the dryer section 400, using a single wire draw R and impingement dryer 450 in the application shown. The web W is coated by a coating section 500,600 and then dried by passing through a drying section 550,650 with basic infrared dryers 565,665 and air cushion dryers 566,666. This non-contact drying section 550, 650 is followed by a short cylinder group 570, 670, where the drawing and tensioning of the paper is done while drying the paper. After this, the paper is calendered a...

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Abstract

The present invention relates to a method for manufacturing a paper or board web. Stock is fed from a headbox (100) to a wire section (200), in which water is removed from the web (W) and from which the web is passed to a press section (300), in which water is pressed out of the web and after which the web is dried in a dryer section (400) and reeled by means of a reel-up (800). According to the invention, additives, fillers and / or fines are fed into the stock of the surface layers of the web in order to reduce the pore size distribution of the web in the surface layers so as to substantially correspond to a precoated web. The invention also relates to a paper or board machine which is characterized in that it comprises means for feeding additives, fillers and / or fines into a fibre stock such that an uncoated web substantially corresponds in its properties to a precoated web.

Description

technical field [0001] The present invention relates to a method for the manufacture of paper or board. [0002] The invention also relates to a paper or board machine. [0003] According to the manufacturing method and paper machine or board machine of the present invention, the scope of application is very wide, and different grades of paper or board can be made, while the traditional method needs to be pre-coated to improve the quality of paper or board. Typical such writing and printing papers are fine papers, light weight coated base papers or improved newsprints in nature and are well known to those skilled in the art. Coating of different grades of paperboard has also increased in recent years. Hereinafter, the present invention will be mainly described in connection with high-grade paper making, but it does not mean that the present invention is limited thereto. Background technique [0004] In the description, high-grade paper refers to uncoated high-grade paper ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H23/18D21F1/02D21H21/14D21H17/67D21H19/82D21F9/02D21F3/02D21F5/00D21F11/00D21F11/04D21H23/20D21H27/00
CPCD21H23/20D21F11/04D21F11/00
Inventor 约翰·格伦帕西·阿霍宁尤哈·S·金奴南彭蒂·劳蒂安南玛丽·泰帕莱
Owner VALMET OY
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