Forming screen for use in a paper machine

A forming screen and paper machine technology, applied in the direction of paper machine, paper making, paper machine wet end, etc., can solve the problems of incomparability, etc., and achieve good dehydration effect, good fiber retention, and small filling degree

Active Publication Date: 2011-07-13
HEIMBACH GMBH & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Smaller longitudinal thread fillings are also used in some cases (cf. US 4 314 589; EP 0010 311; US ​​4 379 735), but there is no comparison between this fabric type and the generic fabric type in this respect of

Method used

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  • Forming screen for use in a paper machine
  • Forming screen for use in a paper machine

Examples

Experimental program
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Embodiment Construction

[0027] The forming screen 1 is a double-layer fabric with a longitudinal yarn layer 2 on the upper paper side and a longitudinal yarn layer 3 on the lower machine side. The two longitudinal yarn layers 2, 3 are formed by longitudinal yarns or warp yarns (for example, marked with 4 or 5) with a yarn number ratio of 1:1, and the longitudinal yarns 4 of the paper-side longitudinal yarn layer 2 They are respectively arranged exactly above the longitudinal yarns 5 in the machine-side longitudinal yarn layer 3, and the longitudinal yarns 4, 5 are correspondingly placed on top of each other in a pair.

[0028] The diameter of the longitudinal yarns 4 in the paper-side longitudinal yarn layer 2 is 0.11 mm, and the diameter of the longitudinal yarns 5 in the machine-side longitudinal yarn layer 3 is 0.18 mm. These longitudinal yarns are composed of PEN (polyethylene naphthalate). The number of longitudinal yarns is 58 per cm in the transverse direction.

[0029] In the case of a plain wea...

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PUM

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Abstract

The invention relates to a forming screen (1) for use in the forming section of a paper machine, comprising a paper side and a machine side as well as longitudinal threads (4, 5) extending in the intended running direction and binding cross threads (10, 11) extending transversely thereto, wherein the longitudinal threads (4, 5) are divided in the ratio of the number of threads of 1:1 in a longitudinal thread layer (3) on the machine side and a longitudinal thread layer (2) on the paper side, and the binding cross threads (10, 11) bind in both longitudinal thread layers (2, 3), which is characterized in that the forming screen has a fiber support index (FSI) which is in the range of 230 to 250 and has an air permeability which is in the range of 5700 to 10600 m<3> / m<2> / h.

Description

Technical field [0001] The present invention relates to a forming screen, which is used in the forming area of ​​a paper machine. The forming screen has a paper side and a machine side, and has longitudinal yarns extending in a prescribed running direction and transverse yarns extending transverse to the longitudinal yarns. Yarns in which the longitudinal yarns are divided into the machine side longitudinal yarn layer and the paper side longitudinal yarn layer at a ratio of 1:1, and the combined transverse yarns are woven into the two longitudinal yarn layers . Background technique [0002] A forming screen is used in the paper forming area of ​​the paper machine. The forming screen is an endless fabric belt with a length of several tens of meters and a width of several meters, which is guided by rollers in such a way that the fabric belt forms a substantially horizontal surface on the upper side. At the beginning of the running stroke, the fiber pulp is transported to this pla...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21F1/10
CPCD21F1/0036D21H23/14D21H23/00
Inventor 罗伯·豪沃思格德·利德里克·卓别林
Owner HEIMBACH GMBH & CO KG
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