CN212312990U

CN212312990U - Papermaking press felt

Info

Publication number: CN212312990U
Application number: CN202021173774.1U
Authority: CN
Inventors: 谢宗国; 戴永君; 周兴富; 王敏; 吴强
Original assignee: Vanov Paper Machine Felt Group Co ltd
Current assignee: Vanov Paper Machine Felt Group Co ltd
Priority date: 2020-06-22
Filing date: 2020-06-22
Publication date: 2021-01-08
Anticipated expiration: 2030-06-22

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 integrated into one piece's latticed structure, the aforesaid fibre web layer, casing ply and elastomer layer entangle the connection through the acupuncture mode, because the elastomer layer has good elasticity, paper press felt is after going out the press district, make paper press felt expand fast because of the good characteristic of elasticity, form the negative pressure on the woollen blanket surface, can keep the quality of paper, reduce 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 an integrally formed grid structure;

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

Preferably, the material of the elastomer layer is TPE.

Preferably, the material of the elastomer layer is TPU.

Preferably, the thickness of the elastomer layer is 0.3 mm to 1.0 mm.

Preferably, the upper base net and the lower base net all include warp and weft that are located same horizontal plane, many warp parallel arrangement, many weft is zigzag and walks around one or many alternately warp, warp with weft is single fiber plied yarn or many plied fiber plied yarns.

Preferably, the warp and the weft are formed by plying six plied yarns, the cross section of each plied yarn is circular, two adjacent plied yarns are tangent, and the circle centers of the six plied yarns are encircled into 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 fiber web layer, casing ply and elastomer layer, fiber web layer includes top layer fiber web, intermediate level fiber web and bottom layer fiber web, the casing ply sets up between intermediate level fiber web and bottom layer fiber 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 integrated into one piece's net type structure, above-mentioned top layer fiber web, intermediate level fiber web, at least one deck upper strata base net, the elastomer layer, at least one deck lower floor's base net, the bottom layer fiber web sets gradually from top to bottom and entangles the connection through the acupuncture mode, because the elastomer layer has good elasticity, paper press felt is after going out the press district, because the good characteristic of elasticity 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. warp threads; 8. and a weft thread.

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 utility model provides a paper press felt, including fiber web layer, skeleton layer and elastomer layer 6, fiber web layer includes surface layer fiber web 1, middle layer fiber web 2 and bottom layer fiber web 3, the skeleton layer is arranged between middle layer fiber web 2 and bottom layer fiber web 3, the skeleton layer includes at least one upper layer base web 4 and at least one lower layer base web 5, upper layer base web 4 and lower layer base web 5 are warp and weft yarn interweaving base web structures, elastomer layer 6 is arranged between upper layer base web 4 and lower layer base web 5, elastomer layer 6 is an integrated grid type structure, above-mentioned surface layer fiber web 1, middle layer fiber web 2, at least one upper layer base web 4, elastomer layer 6, at least one lower layer base web 5, bottom layer fiber web 3 sets gradually from top to bottom and is connected through needle-punching entanglement, because 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.

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 greater than 50%, and good recoverability after removing external force.

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.

Preferably, the thickness of the elastomer 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 elastomer layer 6 is an integrally formed grid-type structure, the grid may be a rectangular grid, and the preferred embodiment is a square grid, the width of the elastomer layer 6 made of TPU is fixed, and the length may reach 500 to 1000 m, and the elastomer layer and the framework layer may be used in combination in a splicing manner, and the elastomer layer and the fiber mesh layer are formed into a strong and elastic paper press felt through needle punching flocking.

Optionally, each layer of the upper base net 4 or each layer of the lower base net 5 is formed by interweaving warps 7 and wefts 8, a plurality of warps 7 and a plurality of wefts 8 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 warps 7 are arranged in parallel, the plurality of wefts 8 are in zigzag shape and alternately pass around one or more warps, refer 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 warps 7 are arranged in parallel, each weft 8 passes through the bottom of one warp 7 and then passes through the top of the adjacent warp 7, then passes through the bottom of the next warp 7 again, and thus passes through the plurality of warps in sequence, the plurality of wefts 8 are arranged alternately, the warps 7 and the wefts 8 can be single fiber plied yarns or multi-plied fiber plied yarns, the material of the fiber can be nylon 6, nylon 66, terylene, polyolefin, etc.

Furthermore, the warp 7 and the weft 8 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

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 an integrally formed grid structure;

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

2. Papermaking press felt according to claim 1, characterised in that the elastomeric layer (6) is of TPE.

3. The papermaking press felt according to claim 2, characterized in that the elastomeric layer (6) is of TPU.

4. Papermaking press felt according to any one of claims 1 to 3, characterised in that the thickness of the elastomeric layer (6) is between 0.3 mm and 1.0 mm.

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 warp threads (7) and weft threads (8) at the same horizontal plane, a plurality of the warp threads (7) are arranged in parallel, a plurality of the weft threads (8) alternately pass around one or more of the warp threads (7) in a zigzag shape, and the warp threads (7) and the weft threads (8) are single-ply or multi-ply fiber plied threads.

6. The papermaking press felt according to claim 5, wherein the warp (7) and the weft (8) are each formed by plying six of the plied yarns, the cross section 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.