Industrial two-layer fabric

a two-layer fabric and fabric technology, applied in the field of new industrial two-layer fabric, can solve the problems of increasing the demand for papermaking fabrics, insufficient dewatering, and becoming more difficult to meet the requirements of papermaking fabrics, and achieves the effects of reducing the amount of water retained, low water retention, and low water retention

Inactive Publication Date: 2021-05-20
NIPPON FILCON
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention provides an industrial two-layer fabric that satisfies basic characteristics of a fabric such as rigidity, wear resistance, dewaterability, mark suppression, and low water retention for reducing the amount of water retained. The fabric is also compatible with a high-speed paper machine. By improving dewaterability and realizing low water retention, the fabric allows for increased speed on the paper machine. The difference in space density can be adjusted by changing the ratio between the upper-surface-side fabric and the lower-surface-side fabric. The fabric has a weave structure formed by two warps and is bound, which minimizes the collapse of the weave structure at the binding part. The fabric achieves excellent advantages of greatly improving dewaterability and having low water retention compared to a conventional fabric. The ratio between the upper-surface-side weft and the lower-surface-side weft can be changed to adjust the dewaterability and water retention.

Problems solved by technology

Furthermore, since the speed of papermaking machines has increased in recent years, the demand for fabrics for papermaking has become even stricter.
Further, in recent years, the use of used paper has increased, and a large amount of fine fibers are mixed, resulting in insufficient dewatering.
Thus, sufficient and uniform dewatering is more important, and it is becoming more difficult to satisfy the required characteristics for fabrics for papermaking.
However, in such a case, the mesh becomes coarse, the rigidity due to the mesh strength decreases, and an excessive mesh space is generated.
As a result, the material does not stay on the fabric and falls off, causing a decrease in yield.
When the dewatering speed of the fabric is high, for example, the mesh of the fabric becomes clogged with the fibers, resulting in the formation of a strong initial mat.
A strong initial mat clogs the mesh of the fabric before the dewatering of the material is completed.
Thus, the subsequent dewatering becomes incomplete and causes poor dewatering, which is, e.g., the cause for the worsening of the texture of the paper.
Therefore, the dewatering performance is unstable.
However, when a strong initial mat is formed, a more significant decrease in dewaterability occurs.
It is known that since intersections appear continuously between adjacent warps, dewatering resistance occurs that is likely to cause marks on the paper at this time.
However, since the two warps are not overlapped on the line of a single warp and are lined up side by side, the warp binding yarn may block the mesh near the weaving of the upper-surface-side weft, and the dewaterability characteristics of the wire may be partially changed giving marks to the paper.
However, due to strong vacuum or the like, the sheet material on the wire may stick into the fabric, and the fibers, filler, etc., may come off, causing dewatering marks to be created noticeably.
However, in such a structure, when warps are formed with different diameters at the top and bottom, the surface space becomes excessively large.
Since the spaces between the warps on the upper surface side become large while the spaces between the warps on the lower surface side become small, the control of the dewatering speed is not sufficient.Patent Document 1: Japanese Patent Application Publication No. 2004-36052Patent Document 2: Japanese Patent Application Publication No. 2004-68168

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Experimental program
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Effect test

first embodiment

[0033]FIG. 2 is a design diagram of the first embodiment pertaining to the industrial two-layer fabric of the present invention. FIG. 3 is a partial side layout view of the first embodiment pertaining to the industrial two-layer fabric of the present invention. The first structure according to the first embodiment is composed of a combination of two upper-surface-side warps and a single lower-surface-side warp. The upper-surface-side warps in the first structure are formed by warp binding yarns having a function of binding the upper-surface-side fabric and the lower-surface-side fabric. Further, the combination of two upper-surface-side warps forming the first structure are disposed adjacent to each other and forms a partial rib weave on the surface of the upper-surface-side fabric. Also, the second structure is composed of a single upper-surface-side warp and a single lower-surface-side warp. The upper-surface-side warp in the second structure is formed by a flat warp. Further, as ...

second embodiment

[0036]FIG. 4 is a design diagram of the first embodiment pertaining to the industrial two-layer fabric of the present invention. FIG. 5 is a partial side layout view of the second embodiment pertaining to the industrial two-layer fabric of the present invention. The first structure according to the second embodiment is composed of a combination of two upper-surface-side warps and a single lower-surface-side warp. The upper-surface-side warps in the first structure are formed by warp binding yarns having a function of binding the upper-surface-side fabric and the lower-surface-side fabric. Further, the combination of two upper-surface-side warps forming the first structure are disposed adjacent to each other and forms a partial rib weave on the surface of the upper-surface-side fabric. Also, the second structure is composed of a single upper-surface-side warp and a single lower-surface-side warp. The upper-surface-side warp in the second structure is formed by a flat warp. Further, a...

third embodiment

[0039]FIG. 6 is a design diagram of the third embodiment pertaining to the industrial two-layer fabric of the present invention. FIG. 7 is a partial side layout view of the third embodiment pertaining to the industrial two-layer fabric of the present invention. The first structure according to the third embodiment is composed of a combination of two upper-surface-side warps and a single lower-surface-side warp. The upper-surface-side warps in the first structure are formed by warp binding yarns having a function of binding the upper-surface-side fabric and the lower-surface-side fabric. Further, the combination of two upper-surface-side warps forming the first structure are disposed adjacent to each other and forms a partial rib weave on the surface of the upper-surface-side fabric. Also, the second structure is composed of a single upper-surface-side warp and a single lower-surface-side warp. The upper-surface-side warp in the second structure is formed by a flat warp. Further, as ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Abstract

Provided is an industrial two-layer fabric satisfying basic characteristics of a fabric. The industrial two-layer fabric pertaining to the present invention has at least a first structure and a second structure in the weave repeat thereof, the first structure being formed by a combination of two upper-surface-side warps and a single lower-surface-side warp, the second structure being formed by a single upper-surface-side warp and a single lower-surface-side warp, the first structure and the second structure being disposed adjacent to each other, the upper-surface-side warps in the first structure being formed by a warp binding yarn having the function of binding an upper-surface-side fabric and a lower-surface-side fabric, the combination of two upper-surface-side warps forming the first structure being disposed adjacent to each other and constituting a partial rib weave at the surface of the upper-surface-side fabric.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application is based upon and claims the benefit of priority from the prior Japanese Patent Application No. 2018-143611, filed on Jul. 31, 2018 and International Patent Application No. PCT / JP2019 / 027881, filed on Jul. 16, 2019, the entire content of each of which is incorporated herein by reference.BACKGROUND OF THE INVENTION1. Field of the Invention[0002]The present invention relates to a new industrial two-layer fabric that has a thin net thickness, is excellent in rigidity, wear resistance, dewaterability, and mark suppression, and can be used in a high-speed paper machine. In particular, the present invention relates to an industrial two-layer fabric that has a flat yarn structure due to the formation of an upper-surface-side fabric by a combination of a warp rib weave structure of two upper-surface-side warps and a flat warp and that further achieves slow dewatering and low water retention effects due to a warp binding arrangeme...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & AuthorityApplications(United States)
IPC IPC(8): D03D11/00D03D15/46
CPCD03D11/00D21F1/0036D03D2700/0111D03D15/46
InventorUEDA, IKUOMURAKAMI, SHINYAYANAI, HIDEYUKI
OwnerNIPPON FILCON