Method of and equipment for manufacturing a fibrous web formed at high consistency

A technology for manufacturing fibers and fiber webs, which is applied in papermaking, paper machines, textiles, and papermaking, and can solve problems such as uniform distribution of fibers and difficulty in forming a properly oriented web

Inactive Publication Date: 2008-04-30
METSO PAPER INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, even fiber distribution and proper orientation are more difficult with existing high-concentration forming techniques than conventional web forming

Method used

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  • Method of and equipment for manufacturing a fibrous web formed at high consistency
  • Method of and equipment for manufacturing a fibrous web formed at high consistency

Examples

Experimental program
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Embodiment Construction

[0025] FIG. 1 shows a possible embodiment of a pressure and heat treatment device for forming a fibrous web W. As shown in FIG. This embodiment comprises a belt calender 1 having a metal belt 2 extending around a plurality of guide rollers 3, at least one of which is adapted to movably adjust the tension or tension of the belt 2 . The forming belt 2 runs through rollers 5 and forms a pressurized and heat-treated zone N between the belt 2 and the rollers 5 . The fibrous web W to be formed travels through the pressure and heat treatment zone N while being formed under pressure momentum and temperature as a function of time. The belt 2 can be heated or cooled by the heating / cooling device 6 . The dotted line 9 in Figure 1 shows the pressure that develops when the press roll 4 is mounted inside the loop made of the forming belt 2, the roll 4 acting as a pressing element and pressing the belt 2 against the roll 5 is applied Greater pressure is provided in the nip of the press an...

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PUM

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Abstract

A method of and equipment for manufacturing a fibrous web, comprising the formation of at least one layer of fibrous web from stock with a solids content of over 1.5%, water being removed from the said fibrous web by first pressing the fibrous web to a solids content of about 45 to 65%, then evaporating the fibrous web to a solids content of about 75 to 95%, after which the fibrous web is treated by means of a pressing contact to increase its smoothness, the fibrous web being treated in the manufacturing process before the reeling stage by at least one pressure and heat treatment, wherein the forming pressure exerted on the fibrous web is not higher than 20MPa.

Description

technical field [0001] The present invention relates to a method for the manufacture of a fibrous web, wherein at least one layer of the fibrous web is formed from pulp having a solids content exceeding 1.5%, water is removed from said fibrous web by first pressing the fibrous web to a solids content of approximately 45% to 65% %, followed by evaporation of the fibrous web to a solids content of approximately 75% to 95%, after which the fibrous web is treated by compressive contact to increase its smoothness. [0002] The invention also relates to an apparatus for producing a fibrous web, wherein at least one fibrous web can be formed from pulp having a solids content exceeding 1.5%, the apparatus comprising a press for pressing the fibrous web so that the solids content is approximately 45% to 65%. forming and pressing section; following the forming and pressing section is a drying section for evaporating the fibrous web to a solids content of about 75% to 95%; Device for tr...

Claims

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Application Information

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IPC IPC(8): D21G1/00D21F
CPCD21G1/00
Inventor 帕西·阿霍宁马尔库·卡尔松保利·屈特宁卡里·雷伊塞宁托米·乌尔马宁雷约·皮耶蒂凯宁埃尔基·伊尔莫涅米
Owner METSO PAPER INC
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