CN212771726U - Papermaking press felt - Google Patents

Abstract

The utility model provides a paper press felt, including the fibre web layer, casing ply and elastomer layer, the fibre web layer includes the top layer fibre web, intermediate level fibre web and bottom fibre web, the casing ply sets up between intermediate level fibre web and bottom fibre web, the casing ply includes at least one deck upper strata base net and at least one deck lower floor's base net, upper strata base net and lower floor's base net are warp and weft yarn interweave base net structure, the elastomer layer sets up between upper strata base net and lower floor's base net, the elastomer layer is monofilament and weaves body grid structure, the aforesaid fibre web layer, casing ply and elastomer layer twine the connection through the acupuncture mode, because the elastomer layer has good elasticity, paper press felt is after going out the press district, because of the good characteristic of elasticity makes paper press felt expand fast, form the negative pressure on the felt surface, can keep the quality of paper, reduce the returning of page and wet, therefore, the drying cost of the paper machine is reduced, the effects of energy conservation and consumption reduction are achieved, and the production efficiency is improved.

Description

Papermaking press felt

Technical Field

The utility model belongs to the technical field of the papermaking woollen blanket technique and specifically relates to a papermaking press felt is related to.

Background

The papermaking felt belongs to special industrial textiles, is an indispensable expensive and consumable device in the papermaking industry at present, has direct relation with the quality of produced paper, the production efficiency of a papermaking machine, the energy consumption and the like, and along with the development of the production technology of the papermaking industry, the papermaking felt is required to have the characteristics of high strength, good smoothness, good compression resilience, good dimensional stability and the like.

At present, a papermaking felt is a key article applied to the steps of wet paper squeezing dehydration or conveying in the papermaking technology, and the industrial preparation method of the papermaking felt is generally to firstly make a base net with wide and many gaps by using synthetic fibers, then compound the base net with non-woven fabric, and carry out needling, chemical treatment, resin integration and heat setting.

How to solve the problem that the papermaking press felt in the prior art cannot rebound quickly after exiting a press area to cause large moisture content of paper becomes a technical problem which needs to be solved urgently by technical personnel in the field.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a papermaking press felt to solve among the prior art papermaking press felt and can't kick-back rapidly and lead to the big problem of paper moisture content after going out the press district.

The utility model provides a plurality of technical effects that preferred technical scheme among a great deal of technical scheme can produce see the explanation below in detail.

In order to achieve the above purpose, the utility model provides a following technical scheme:

the utility model provides a pair of papermaking press felt, include:

the fiber net layer comprises a surface fiber net, a middle layer fiber net and a bottom layer fiber net;

the framework layer is arranged between the middle layer fiber net and the bottom layer fiber net and comprises at least one upper layer base net and at least one lower layer base net, and the upper layer base net and the lower layer base net are both warp and weft yarn interwoven base net structures;

the elastic body layer is arranged between the upper base net and the lower base net and is of a monofilament braided body net structure;

the fiber web layer, the framework layer and the elastomer layer are connected through needle punching entanglement.

Preferably, the elastomer layer includes many first warps and many first wefts, many first warp and many first weft are located same horizontal plane, every first weft is every S-shaped and passes every in proper order first warp, many first weft sets up along warp-wise crisscross.

Preferably, the first warp and the first weft are made of TPE.

Preferably, the material of the first warp and the first weft is TPU.

Preferably, the upper base net with the lower floor's base net all includes second warp and the second weft that is located same horizontal plane, many second warp parallel arrangement, many the second weft is zigzag and walks around one or many in turn the second warp, the second warp with the second weft is single fiber plied yarn or many plying fiber plied yarns.

Preferably, the second warp and the second weft are formed by plying six strands of the plied yarns, the cross section of each plied yarn is circular, two adjacent plied yarns are tangent, and the circle centers of the six strands of the plied yarns enclose a circle.

Preferably, the surface fiber net is made of fibers with the fineness of 3dtex to 44 dtex.

Preferably, the middle layer fiber net is made of fibers with the fineness of 11dtex to 44 dtex.

Preferably, the bottom layer fiber net is made of fibers with the fineness of 11dtex to 66 dtex.

Preferably, the material of the fiber is nylon 6 or nylon 66 or terylene or polyolefin.

The utility model provides a pair of papermaking press felt, its beneficial effect is:

the utility model provides a paper press felt, including the fibre web layer, casing ply and elastomer layer, the fibre web layer includes top layer fibre web, intermediate level fibre web and bottom fibre web, the casing ply sets up between intermediate level fibre web and bottom fibre web, the casing ply includes at least one deck upper strata base net and at least one deck lower floor's base net, upper strata base net and lower floor's base net are warp and weft yarn interweave base net structure, the elastomer layer sets up between upper strata base net and lower floor's base net, the elastomer layer is monofilament and weaves body network structure, above-mentioned top layer fibre web, intermediate level fibre web, at least one deck upper strata base net, the elastomer layer, at least one deck lower floor's base net, the bottom fibre web sets gradually from top to bottom and twines the connection through the acupuncture mode, because the elastomer layer has good elasticity, paper press felt is after going out the press district, because of good characteristic makes paper press felt expand fast, negative pressure is formed on the surface of the blanket, so that the dryness of paper can be maintained, and the moisture return of paper sheets is reduced, thereby reducing the drying cost of a paper machine, playing the roles of saving energy and reducing consumption, and improving the production efficiency.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic view of a papermaking press felt according to an embodiment of the present invention;

FIG. 2 is a diagram illustrating an elastomer layer structure according to an embodiment of the present invention;

fig. 3 is a diagram illustrating an upper layer base net or a lower layer base net according to an embodiment of the present invention.

In the figure: 1. a surface layer web; 2. a middle layer web; 3. a bottom layer web; 4. an upper base web; 5. a lower base net; 6. an elastomeric layer; 7. a first warp thread; 8. a first weft; 9. a second warp thread; 10. and a second weft.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Hereinafter, embodiments will be described with reference to the drawings. The embodiments described below do not limit the scope of the invention described in the claims. Further, the entire contents of the configurations shown in the following embodiments are not limited to those necessary as a solution of the invention described in the claims.

Referring to fig. 1 to 3, the present invention provides a press felt for papermaking, which comprises a fiber web layer, a skeleton layer and an elastomer layer 6, wherein the fiber web layer comprises a surface fiber web 1, a middle layer fiber web 2 and a bottom layer fiber web 3, the skeleton layer is arranged between the middle layer fiber web 2 and the bottom layer fiber web 3, the skeleton layer comprises at least one upper layer base web 4 and at least one lower layer base web 5, the upper layer base web 4 and the lower layer base web 5 are warp and weft yarn interwoven base web structures, the elastomer layer 6 is arranged between the upper layer base web 4 and the lower layer base web 5, the elastomer layer 6 is a monofilament woven body grid structure, the surface fiber web 1, the middle layer fiber web 2, the at least one upper layer base web 4, the elastomer layer 6, the at least one lower layer base web 5, the bottom layer fiber web 3 are sequentially arranged from top to bottom and are intertwined by a needle punching manner, because the elastomer layer 6 has good elasticity, after the papermaking press felt is out of the press area, the papermaking press felt is rapidly expanded due to the characteristic of good elasticity, negative pressure is formed on the surface of the felt, the dryness of paper can be kept, and the rewetting of paper sheets is reduced, so that the drying cost of a paper machine is reduced, the effects of energy conservation and consumption reduction are achieved, and the production efficiency is also improved.

The utility model provides a papermaking press felt twines the fibre through the needle loom and forms to one deck upper strata base web 4 and one deck lower floor base web 5 are for example, can set up elastomer layer 6 between upper strata base web 4 and lower floor base web 5 earlier, entangle the connection through the needle loom, then entangle middle level fibre web 2 through the needle loom, then entangle bottom fibre web 3 through the needle loom, entangle top layer fibre web 1 through the needle loom at last, stereotype in proper order, arrange in order, obtain the utility model discloses a papermaking press felt.

Preferably, the thickness of the elastic body layer 6 may be 0.3 mm to 1.0 mm, and may be 0.3 mm, 0.5 mm, 0.8 mm, or 1.0 mm, and the width of the elastic body layer 6 is constant, and the length may reach 500 to 1000 m, and the elastic body layer may be used in combination with the skeleton layer in a splicing manner, and forms a strong and elastic paper press felt together with the fiber web layer through needle-punching flocking.

In implementation, the elastomer layer 6 may include a plurality of first warps 7 and a plurality of first wefts 8, the plurality of first warps 7 and the plurality of first wefts 8 are located in the same horizontal plane, the plurality of first warps 7 are arranged in parallel, each first weft 8 sequentially passes through each first warp 7 in an S-shape, and the plurality of first wefts 8 are arranged in a staggered manner in the warp direction.

As an alternative embodiment, the material of the elastic body layer 6 may be TPE, i.e. thermoplastic elastomer, which is a material with high elasticity, high strength and high resilience of rubber, and the elastomer refers to a polymer material with a glass transition temperature lower than room temperature, an elongation at break of > 50%, and good recoverability after the external force is removed.

The preferable material of the elastomer layer 6 is TPU, namely thermoplastic polyurethane elastomer rubber, the hardness range is wide (60HA-85HD), the TPU is wear-resistant, oil-resistant, transparent and good in elasticity and is an excellent material used as an elastomer, and thermoplastic elastomer materials such as TPU are selected as framework materials of the papermaking press felt, so that the elastic recovery performance of the papermaking press felt can be improved.

Optionally, each layer of the upper base net 4 or each layer of the lower base net 5 is formed by interweaving second warps 9 and second wefts 10, a plurality of second warps 9 and a plurality of second wefts 10 of each layer of the upper base net 4 or each layer of the lower base net 5 are located on the same horizontal plane, the plurality of second warps 9 are arranged in parallel, the plurality of second wefts 10 alternately bypass one or more second warps in a zigzag shape, referring to fig. 3, fig. 3 shows a structural diagram of the upper base net 4 or the lower base net 5, the upper base net 4 and the lower base net 5 have the same structure, the plurality of second warps 9 are arranged in parallel, each second weft 10 passes through the bottom of one second warp 9 and then bypasses the second warps 9, passes through the adjacent three second warps 9 and then bypasses the next second warp 9, so that the plurality of second warps sequentially pass through, and the plurality of second wefts 10 are arranged alternately, the second warp 9 and the second weft 10 may be single fiber plied yarns or multiple fiber plied yarns, and the material of the fiber may be nylon 6, nylon 66, terylene, polyolefin, or the like.

Furthermore, the second warp threads 9 and the second weft threads 10 can be formed by plying six plied yarns, the cross sections of the plied yarns are circular, the circle centers of the six plied yarns can enclose a circular arrangement, and the cross sections of two adjacent plied yarns are tangent; or one of the plied yarns is taken as the center, the other five plied yarns are uniformly distributed around the center, the other five plied yarns are connected with the middle plied yarn, and the cross section of the middle plied yarn is tangent to the cross sections of the five plied yarns around the center.

In practice, the surface layer fiber web 1 may be made of fibers with a fineness of 3dtex to 44dtex, for example, 3dtex, 20dtex or 44 dtex; the middle layer fiber net 2 can be made of fibers with the fineness of 11dtex to 44dtex, such as 11dtex, 20dtex or 44dtex, the bottom layer fiber net 3 can be made of fibers with the fineness of 11dtex to 66dtex, such as 11dtex, 30dtex or 66dtex, and the materials of the fibers can be nylon 6 or nylon 66 or terylene or polyolefin, and the like.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (10)

1. A papermaking press felt, comprising:

the fiber net layer comprises a surface fiber net (1), a middle layer fiber net (2) and a bottom layer fiber net (3);

the framework layer is arranged between the middle layer fiber net (2) and the bottom layer fiber net (3) and comprises at least one layer of upper layer base net (4) and at least one layer of lower layer base net (5), and the upper layer base net (4) and the lower layer base net (5) are both warp and weft yarn interwoven base net structures;

the elastic body layer (6) is arranged between the upper base net (4) and the lower base net (5) and is of a monofilament braided body net structure;

the fiber web layer, the framework layer and the elastomer layer (6) are connected through needle punching entanglement.

2. The papermaking press felt according to claim 1, characterized in that the elastomer layer (6) comprises a plurality of first warp threads (7) and a plurality of first weft threads (8), the plurality of first warp threads (7) and the plurality of first weft threads (8) are located in the same horizontal plane, each first weft thread (8) passes through each first warp thread (7) in turn in an S-shape, and the plurality of first weft threads (8) are staggered in the warp direction.

3. The papermaking press felt according to claim 2, characterised in that the first warp threads (7) and the first weft threads (8) are of TPE.

4. The papermaking press felt according to claim 3, characterized in that the material of the first warp threads (7) and the first weft threads (8) is TPU.

5. The papermaking press felt according to claim 1, characterized in that the upper base web (4) and the lower base web (5) each include second warp threads (9) and second weft threads (10) at the same horizontal plane, a plurality of the second warp threads (9) are arranged in parallel, a plurality of the second weft threads (10) alternately pass around one or more of the second warp threads (9) in a zigzag shape, and the second warp threads (9) and the second weft threads (10) are single-fiber plied yarns or multi-fiber plied yarns.

6. The papermaking press felt according to claim 5, wherein the second warp (9) and the second weft (10) are each formed by twisting six of the plied yarns, the cross section of each of the plied yarns is circular, two adjacent plied yarns are tangent to each other, and the centers of the six plied yarns enclose a circle.

7. The papermaking press felt according to claim 1, characterized in that the surface layer fiber web (1) is made of fibers having a fineness of 3dtex to 44 dtex.

8. The papermaking press felt according to claim 1, characterized in that the middle layer web (2) is made of fibers having a fineness of 11dtex to 44 dtex.

9. The papermaking press felt according to claim 1, characterized in that the bottom layer web (3) is made of fibers having a titer of 11dtex to 66 dtex.

10. The papermaking press felt according to any one of claims 5 to 9, wherein the fibers are made of nylon 6, nylon 66, polyester or polyolefin.

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