CN201395739Y

CN201395739Y - Two and a half layer forming fabric with high retention rate used for light weight papermaking

Info

Publication number: CN201395739Y
Application number: CN2009200901106U
Authority: CN
Inventors: 董华伟; 王友保
Original assignee: Henan Huafeng Polyester Net Industrial Co Ltd
Current assignee: Henan Huafeng Polyester Wire Mesh Science & Technology Co., Ltd.
Priority date: 2009-05-08
Filing date: 2009-05-08
Publication date: 2010-02-03
Anticipated expiration: 2019-05-08

Abstract

The utility model discloses a two and a half layer forming fabric with high retention rate used for light weight papermaking. The fabric comprises a surface fabric and a bottom fabric interwoven through warps and wefts, wherein the surface fabric adopts an eight heald twill woven structure, and the bottom fabric adopts a sixteen heald broken satin woven structure; and the wefts comprise surface fabric wefts and bottom fabric wefts; the surface fabric wefts comprise thick surface fabric wefts and thin surface fabric wefts, and the thick surface fabric wefts and the thin surface fabric wefts arearranged at intervals; the bottom wefts comprise nylon bottom wefts and polyester bottom wefts which are arranged at intervals, the warp density is 57 warps/cm, the weft density is not less than 59 wefts/cm, the weft diameter of the thick surface fabric wefts is not less than 0.18 mm, and the weft diameter of the thin surface fabric wefts is 0.13 mm. The utility model enhances the retention rateof pulp fiber during papermaking process by utilizing the forming fabric, especially the retention rate of fine fibers; and the forming fabric is suitable for manufacturing light weight paper.

Description

A kind of low two layers of half form net of quantitative paper grade (stock) high retention rate

Technical field

The utility model relates to pulp technology for making paper, especially relates to a kind of low two layers of half form net of quantitative paper grade (stock) high retention rate.

Background technology

The manufacture paper with pulp 2B603516-570 series net of 30～55 gram/square metre cultural paper of routine, warp-wise density is 60/cm, the warp line directly is 0.17mm, face picks is eight palm fibre one thick (0.20mm polyester) thin (0.13mm polyester) parallel twill weaves, back weft is isometrical (0.35mm polyester), the broken satin weave of (0.35mm nylon) 16 palm fibres, latitudinal density can reach 57/cm, the characteristics of this series net are: net structure is stable, air permeability is medium with fiber retention, be shaped dehydration well, the life-span is also better; But adaptability scope that should the series net is restricted, and relatively is suitable for more long stapled magma, and the retention rate of fiber fines is relatively poor.At present, because the develop rapidly of paper industry, the paper pulp famine that seems, recycled pulp, the raising beating degree of utilizing the waste paper recovery to make promote former pulp yield all can make the more tiny of pulp fiber, the ratio of fiber fines constantly rises, and the raising of the retention rate of fiber fines has the economic worth of particular importance undoubtedly.

The utility model content

In view of this, the purpose of this utility model is to overcome the defective of prior art, and a kind of low two layers of half form net of quantitative paper grade (stock) high retention rate are provided, and improves the retention of the retention, particularly fiber fines of forming net paper pulp fiber in paper-making process.

For achieving the above object, the utility model by the following technical solutions:

Low two layers of half form net of quantitative paper grade (stock) high retention rate of the present utility model comprise the veil and the spacer screen that are become with the parallel weaving by warp, and veil adopts eight to combine the twill weave structure, and spacer screen adopts 16 to combine broken satin weave structure; Parallel comprises veil parallel and spacer screen parallel; Described veil parallel is made up of asperities net parallel and fine flour net parallel, and asperities net parallel and fine flour net parallel are spaced; Described spacer screen parallel is made up of nylon spacer screen parallel and polyester spacer screen parallel, the arrangement of being separated by of nylon spacer screen parallel and polyester spacer screen parallel, warp density is 57/cm, weft density is not less than 59/cm, the line of asperities net parallel directly is not more than 0.18mm, and the line of fine flour net parallel directly is 0.13mm.

Further, nylon spacer screen parallel line directly is not less than 0.37mm, and polyester spacer screen parallel line directly is not more than 0.35mm.

The beneficial effects of the utility model are:

The warp density of the utility model forming net suitably reduces, weft density suitably increases, also there is suitable reducing in the line of parallel footpath simultaneously, compared with prior art, the reservation amount that short and small paper pulp fiber has been satisfied in the reasonable increase of weft density increases, thereby promoted the retention of forming net, higher retention helps satisfying when manufacturing paper with pulp low weight paper the performance requirement to forming net.And the retention increase of short and small fiber makes forming net of the present utility model not only satisfy when manufacturing paper with pulp low weight paper the performance requirement to forming net, and the type scope of employed paper pulp is increased, the recycled pulp that particularly can use the waste paper recovery to make is produced the low weight paper product, thereby helps environmental protection.Other advantages of the present utility model, target and feature will be set forth to a certain extent in the following description, and to a certain extent, based on being conspicuous to those skilled in the art, perhaps can from practice of the present utility model, obtain instruction to investigating hereinafter.

Description of drawings

Accompanying drawing is the generalized section of forming net fragment of the present utility model along machine direction.(machine direction is the forming net direction consistent with the paper machine traffic direction, and also promptly alleged usually is vertical)

The specific embodiment

Below in conjunction with drawings and Examples the utility model is further described.

As shown in drawings, two layers of half form net of low quantitative paper grade (stock) high retention rate of present embodiment comprise the veil and the spacer screen that are become with the parallel weaving by warp, and veil adopts eight to combine the twill weave structure, and spacer screen adopts 16 to combine broken satin weave structure; Parallel comprises veil parallel and spacer screen parallel; Described veil parallel is made up of asperities net parallel 2 and fine flour net parallel 1, and asperities net parallel 2 and fine flour net parallel 1 are spaced; Described spacer screen parallel is made up of nylon spacer screen parallel 4 and polyester spacer screen parallel 5, the arrangement of being separated by of nylon spacer screen parallel 4 and polyester spacer screen parallel 5; Warp density is 57/cm, and weft density is 59/cm, and the line of asperities net parallel 2 directly is 0.18mm, and the line of fine flour net parallel 1 directly is 0.13mm; The line of nylon spacer screen parallel 4 directly is 0.37mm, and the line of polyester spacer screen parallel 5 directly is 0.35mm.The advantage of the forming net of present embodiment is as follows:

When 1), using the forming net of present embodiment, control paper machine slurry network speed ratio is less than 1, paper pulp fiber is arranged along machine direction, because the forming net latitudinal density rises, fiber fines has obtained good reservation like this, fiber support index F.S.I by original 128 be promoted to 131 and paper machine slurry network speed ratio match, the one way retention of paper pulp can improve more than 3%, the loss of the fiber of minimizing.At present, because the develop rapidly of paper industry, the paper pulp famine that seems, recycled pulp, the raising beating degree of utilizing the waste paper recovery to make promote former pulp yield all can make the more tiny of pulp fiber, the ratio of fiber fines constantly rises, the retention rate of fiber fines significantly improve economic worth with particular importance; The remarkable decline of paper machine machine water concentration has simultaneously reduced the environmental protection pressure and the economy that reduce discharging again, and economic benefit is very considerable.

2), the lateral stiffness of the forming net of present embodiment is strengthened, latitudinal density is brought up to 59/cm by 57/cm of prior art, has promoted 3.5%, can resist the vacuum draw of paper machine vacuum tank, flour milling back weft wear volume is improved simultaneously, and the life-span of net obviously prolongs.

3), the intensity of nylon yarn, ABRASION RESISTANCE is better than Polyester Filament, the line footpath of the utility model nylon bottom surface parallel further increases, thereby has strengthened the wear resistence of forming net, the service life that helps to improve net.

4), after actual batch process the in batches, use checking, produce a desired effect fully and economy through the paper mill.Example: be about 50 days service life before the silver dove 4400-520 kraft paperboard machine side net remodeling of Luohe, reaches 65 days now service life.

Explanation is at last; the foregoing description is only unrestricted in order to the explanation the technical solution of the utility model; other modifications that those of ordinary skills make the technical solution of the utility model; only otherwise break away from the spirit and scope of technical solutions of the utility model, all should be encompassed in the middle of the protection domain of the present utility model.

Claims

1. one kind low two layers of half form net of quantitative paper grade (stock) high retention rate comprise the veil and the spacer screen that are become with the parallel weaving by warp, and veil adopts eight to combine the twill weave structure, and spacer screen adopts 16 to combine broken satin weave structure; Parallel comprises veil parallel and spacer screen parallel; Described veil parallel is made up of asperities net parallel and fine flour net parallel, and asperities net parallel and fine flour net parallel are spaced; Described spacer screen parallel is made up of nylon spacer screen parallel and polyester spacer screen parallel, the arrangement of being separated by of nylon spacer screen parallel and polyester spacer screen parallel, it is characterized in that: warp density is 57/cm, weft density is not less than 59/cm, the line of asperities net parallel directly is not more than 0.18mm, and the line of fine flour net parallel directly is 0.13mm.

2. low two layers of half form net of quantitative paper grade (stock) high retention rate according to claim 1, it is characterized in that: nylon spacer screen parallel line directly is not less than 0.37mm, and polyester spacer screen parallel line directly is not more than 0.35mm.