CN201395738Y

CN201395738Y - Three-layer forming fabric with high retention rate used for papermaking

Info

Publication number: CN201395738Y
Application number: CN2009200901093U
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 three-layer forming fabric with high retention rate used for papermaking. The fabric comprises a surface fabric and a bottom fabric interwoven from warps and wefts, wherein the surface fabric adopts a two heald plain woven structure, and the bottom fabric adopts a six heald twill woven structure; the warps comprise surface fabric warps and bottom fabric warps of whichthe warp diameters are respectively 0.22 mm and 0.3 mm, and the knitting tightness of the surface fabric warps and the bottom fabric warps are respectively 21 warp/cm; the wefts comprise surface fabric wefts and bottom fabric wefts, wherein the surface fabric wefts are composed of nylon surface fabric wefts and polyester surface fabric wefts which are arranged at intervals, the weft diameter thereof is 0.22 mm, and the nylon surface fabric wefts are adopted as connecting threads to composite the surface fabric and the bottom fabric. The utility model is used for quantificationally manufacturing packing paper (more than 80 g/square meter) with pulp, when in use, the pulp retention rate is high, the forming effect is good, the service life is long, and the fabric can be used for the liningfabric, bottom fabric and core fabric of the overlapped fabric paper machine.

Description

A kind of paper grade (stock) high retention rate three-layer forming net

Technical field

The utility model relates to pulp technology for making paper, especially relates to a kind of paper grade (stock) high retention rate three-layer forming net.

Background technology

Routine manufacture paper with pulp quantitative 80 grams/square metre more than the 2B4216 series net of wrapping paper, through being commonly used for the lining net and the spacer screen of paper machine of the laminated network, this series net warp-wise density is 46 pieces/centimeter, warp line footpath 0.23mm, face picks is eight palm fibre one thick (0.25mm polyester) thin (0.17mm polyester) parallel twill weaves, back weft is isometrical (0.45mm polyester), the broken satin weave of (0.45mm nylon) 16 palm fibres, latitudinal density can reach 42 pieces/centimeter, these series net characteristics are: net structure is stable, air permeability is medium with fiber retention, be shaped dehydration well, the life-span is also better; But because this series net is two and half braided structures, interspersed surface layer of warp and bottom, wire range is restricted, if the line grade is thick, then tensile strength increases, but influence surface formable layer effect; If the line grade is thin, the surface forming effect is better, but the net endwise tensile strength is affected.Another kind of routine manufacture paper with pulp quantitative 80 grams/square metre more than the 2B3616 series net of wrapping paper, through being commonly used for the core net of paper machine of the laminated network, this series net warp-wise density is 40 pieces/centimeter, warp line footpath 0.28mm, face picks is eight palm fibre one thick (0.28mm polyester) thin (0.20mm polyester) parallel twill weaves, back weft is isometrical (0.50mm polyester), the broken satin weave of (0.50mm nylon) 16 palm fibres, latitudinal density can reach 36 pieces/centimeter, these series net characteristics are: net structure is stable, air permeability is big, and dewatering is good, the life-span is also better; But owing to also be to adopt two and half braided structures, exist and the same defective of 2B4216 series net, interspersed surface layer of warp and bottom, wire range is restricted, if the line grade is thick, then tensile strength increases, but influence surface formable layer effect, if the line grade is thin, the surface forming effect is better, but the net endwise tensile strength is affected.

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 paper grade (stock) high retention rate three-layer forming net is provided, and improves the retention and the molding effect of forming net for papermaking fiber in paper-making process, and prolongs the service life of forming net.

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

Paper grade (stock) high retention rate three-layer forming net of the present utility model comprises the veil and the spacer screen that are become with the parallel weaving by warp, and veil adopts two to combine the plain weave structure, and spacer screen adopts six to combine the twill weave structure; Described warp comprises veil warp and spacer screen warp, and the line of veil warp and spacer screen warp directly is respectively 0.22mm and 0.3mm, and the count of veil warp and spacer screen warp is 21/cm; Described parallel comprises veil parallel and spacer screen parallel, and wherein, the veil parallel is made up of nylon veil parallel and polyester veil parallel, and nylon veil parallel and polyester veil parallel are spaced and line directly is 0.22mm; Adopt nylon veil parallel as compound veil of connecting line and spacer screen.

Further, described spacer screen parallel line directly is 0.4-0.55mm.

The beneficial effects of the utility model are:

The veil of the utility model forming net adopts two of fine line diameter to combine the plain weave weave, and surperficial intertwined point is a lot, and forming effect is good when manufacturing paper with pulp, the fiber retention height, and the page fissility is good, fully satisfies the forming requirements when copying paper; Spacer screen adopts six of big line footpath to combine the twill weave, and the tensile strength of forming net MCD direction (direction that forming net is consistent with the paper machine operation direction, i.e. machine direction) is big, and back weft floats long line ratio height, and wear-resisting volume is big, and the life-span of net is improved fully; Employing nylon veil netting twine connects compound veil and spacer screen helps to guarantee bonding strength, and the veil spacer screen is in conjunction with firm.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 be forming net fragment of the present utility model along with the generalized section of machine direction vertical direction.

The specific embodiment

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

As shown in drawings, the paper grade (stock) high retention rate three-layer forming net of present embodiment comprises the veil and the spacer screen that are become with the parallel weaving by warp, and veil adopts two to combine the plain weave structure, and spacer screen adopts six to combine the twill weave structure; Described warp comprises veil warp 1 and spacer screen warp 3, and the line of veil warp 1 and spacer screen warp 3 directly is respectively 0.22mm and 0.3mm, and the count of veil warp 1 and spacer screen warp 3 is 21/cm; Described parallel comprises veil parallel 2 and spacer screen parallel 4, and wherein, veil parallel 2 is made up of nylon veil parallel and polyester veil parallel, and nylon veil parallel and polyester veil parallel are spaced and line directly is 0.22mm; Adopt nylon veil parallel as compound veil of connecting line and spacer screen; The line footpath of spacer screen parallel 4 can be chosen between 0.4-0.55mm, thereby forms different parallel counts, and the line of present embodiment spacer screen parallel 4 directly is 0.45mm.The forming net of present embodiment has the following advantages in use:

1), the veil of present embodiment forming net adopts two of fine line diameter to combine the plain weave weaves, surperficial intertwined point is a lot, forming effect is good when manufacturing paper with pulp, the fiber retention height, the page fissility is good; Fully satisfy the forming requirements when copying paper;

2), the spacer screen of present embodiment forming net adopts six of big line footpath to combine the twill weaves, the tensile strength of forming net MCD direction (machine direction) is big, back weft floats long line ratio height, wear-resisting volume is big, the life-span of forming net is improved fully;

3), the lateral stiffness of present embodiment forming net strengthened, when copying paper and use, the net non-deformability is strong, can resist the vacuum draw of paper machine vacuum tank, reduces the degree of paper machine with the wearing and tearing of selvage portion, the life-span of net is improved significantly.

4), the thickness of three-layer forming net is strengthened, net free space amount rises, ventilative and drainage capacity is better than two layers of half form net, for guaranteeing and the same air permeability of two and half nets, the latitudinal density of three-layer network can increase by two on year-on-year basis, surface layer net forming effect and back weft wear volume are improved simultaneously like this, improve synchronously from forming paper effect and service life;

5), the forming net of present embodiment design model is a SSB3C3824 series, the present embodiment forming net can be taken into account paperboard machine lining core prime cement net simultaneously, substitute the forming net of 2B4216 series of the prior art and 2B3616 series, change the production efficiency waste that kind causes when having reduced knitmesh, production efficiency is improved, the flexibility of the supply of material increases, and delivery cycle obviously reduces;

6), surface layer net and underlying network connecting line adopt the nylon of high strength and highly anti-fatigue degree, nylon wire is carried out from connection (self-support binding) again as face picks simultaneously, bonding strength is guaranteed, and makes the surface layer net combine with underlying network firmly;

7), new design net type has been converted into actual batch process, uses checking through the paper mill, produce a desired effect fully and economy.

8), the SSB3C3824 of present embodiment series forming net and 2B4216 series forming net technical parameter under equal air permeability and freeness situation compare:

SSB3C3824 2B4216

Air permeability (M3/M2H): 6,800 6800

Tensile strength (N/cm): 1,710 1445

Back weft density (root/cm): 15 14

The surface interweave count (individual/cm ²): 630 322

Fiber support index (F.S.I): 83 92.4

Explanation is at last, above embodiment 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 or be equal to replacement, 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 claim scope of the present utility model.

Claims

1. paper grade (stock) high retention rate three-layer forming net, comprise the veil and the spacer screen that become with the parallel weaving by warp, it is compound that veil and spacer screen are connected by connecting line, it is characterized in that: veil adopts two to combine the plain weave structures, and spacer screen adopts six to combine the twill weave structures; Described warp comprises veil warp and spacer screen warp, and the line of veil warp and spacer screen warp directly is respectively 0.22mm and 0.3mm, and the count of veil warp and spacer screen warp is 21/cm; Described parallel comprises veil parallel and spacer screen parallel, and wherein, the veil parallel is made up of nylon veil parallel and polyester veil parallel, and nylon veil parallel and polyester veil parallel are spaced and line directly is 0.22mm; Adopt nylon veil parallel as compound veil of connecting line and spacer screen.

2. paper grade (stock) high retention rate three-layer forming net according to claim 1 is characterized in that: described spacer screen parallel line directly is 0.4-0.55mm.