CN212895685U - Papermaking felt based on grid type elastomer - Google Patents

Abstract

The utility model provides a papermaking felt based on net type elastomer relates to papermaking felt technical field, has solved among the prior art papermaking felt and still has to go out that press the district back paper moisture content big, technical problem that rewetting is serious. This papermaking felt includes the front fibre web layer that from top to bottom connects gradually, the nexine fibre web layer, the elastomer layer, two at least layers of basic web layers and back fibre web layer, the elastomer layer is integrated into one piece's net type structure, it forms to entangle through the acupuncture between each layer, so set up, the elastic recovery performance of papermaking felt has been improved, and then its life cycle has been improved, and when going out the press nip, can make the papermaking felt retract the inflation fast, form the negative pressure on its surface, water in the papermaking felt to the backward flow in the paper has greatly been reduced, the basic web layer has greatly improved the water holding space of papermaking felt, in order to keep the dryness fraction of paper, reduce the dewetting of paper department, thereby reduce the drying cost of paper machine, play the effect of energy saving and consumption reduction.

Description

Papermaking felt based on grid type elastomer

Technical Field

The utility model belongs to the technical field of the papermaking felt technique and specifically relates to a papermaking felt based on net type elastomer is related to.

Background

The papermaking felt is a fabric felt used for forming and conveying paper in the paper industry, and is classified into a wet felt, an upper felt and a dry felt according to the location on the paper machine, and the papermaking felt is required to have good dewatering property, smoothness, abrasion resistance and the like.

In the prior art, papermaking felts are used in paper mills to press dewater paper. In the pressing area, the maximum pressure of about one thousand kilograms can be applied to each centimeter of the line of the paper making felt, and the water in the paper after being compressed flows out of the paper making felt so as to dewater the paper. The existing papermaking felt is usually composed of a surface fiber net layer, a middle framework layer and a back fiber net layer, the deformation of the whole papermaking felt can only depend on the deformation of the material of the fiber net and the deformation of a weaving structure, the elasticity of the papermaking felt is poor, the fiber of paper is thinner than that of the papermaking felt, the capillary action is stronger, the adsorption effect is stronger, after the paper is squeezed out of a squeezing area, the water in the papermaking felt can return to the inside of the paper, the water rewetting on the paper is serious, namely, the existing papermaking felt still has the defect of large moisture content of paper in the squeezing area in the squeezing and dewatering process, and the dewatering efficiency in the squeezing process is low.

Therefore, how to solve the technical problems of large moisture content and serious rewet of paper sheets after the paper making felt exits from a pressing area still exists in the prior art becomes an important technical problem to be solved by the personnel in the field.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a papermaking felt based on net type elastomer has solved among the prior art papermaking felt and still has to go out that the paper moisture content is big behind the expression district, technical problem that rewetting is serious. 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 papermaking felt based on net type elastomer, include: the elastic body layer is of an integrally formed grid structure, and the front fiber net layer, the inner fiber net layer, the elastic body layer, the base net layer and the back fiber net layer are formed by needle-punching and tangling.

Preferably, the material of the elastomer layer is a thermoplastic elastomer.

Preferably, the material of the elastomer layer is a thermoplastic polyurethane elastomer.

Preferably, the thickness of the elastomeric layer is between 0.3mm and 1.0 mm.

Preferably, the base net layer comprises a plurality of parallel warps and a plurality of parallel wefts, and the warps and the wefts are woven into a net.

Preferably, the warp and the weft are both provided as a single fiber filament or plied by a plurality of fiber filaments.

Preferably, the elastomer layer comprises a substrate and a plurality of meshes arranged on the substrate in parallel, and the meshes extend and are distributed along the arrangement direction of the warp or the weft.

Preferably, the material of the base net layer is one or a combination of more of nylon fiber, polyethylene fiber, polypropylene fiber or polyester net.

Preferably, the front fiber mesh layer, the inner fiber mesh layer and the back fiber mesh layer are made of one or a combination of nylon 6 fiber, nylon 66 fiber or polyester fiber.

Preferably, the fiber fineness of the front fiber web layer, the back fiber web layer and the back fiber web layer decreases from bottom to top in sequence.

The utility model provides a papermaking felt based on net type elastomer, including positive fiber network layer, nexine fiber network layer, elastomer layer, two at least layers basic stratum reticulare and the back fiber network layer that from top to bottom connects gradually, twine to connect through the acupuncture flocking machine relapse acupuncture between each layer, and the elastomer layer is integrated into one piece's net type structure.

Compared with the prior art, the utility model discloses can produce following beneficial effect at least:

firstly, the utility model discloses a papermaking felt adds the elastomer layer, has improved papermaking felt's elastic recovery performance, and then has improved papermaking felt's life cycle. When the papermaking felt and the paper are in the press area, the paper is pressed, water in the paper is flowed out to enter the papermaking felt, and at the moment, the elastomer layer is pressed to deform. When the paper making felt and the paper are out of the press area, the elasticity of the elastomer layer is good, deformation needs to be recovered, the paper making felt is enabled to retract and expand rapidly, negative pressure is formed on the surface of the paper making felt, the backflow of water in the paper making felt to the paper is greatly reduced, the water containing space of the base net layer is large, the requirement of large-amount dehydration in unit time under high vehicle speed is greatly met, the dryness of the paper can be kept, the dewetting of the paper is reduced, the drying cost of the paper machine is reduced, and the effects of saving energy and reducing consumption are achieved.

Secondly, the utility model discloses an elastomer layer is integrated into one piece's net type structure, and its upper and lower surface is smooth level and smooth and elasticity is better, and the water permeability is better, but the better and quick expansion that contracts of retracting of papermaking felt ductility moreover.

Furthermore, the elastomer layer of the present invention is disposed on the upper portion of the base web layer, i.e., the front fiber web layer and the inner fiber web layer are pressed close to each other, so that the overall elasticity of the papermaking felt is better.

Finally, the utility model discloses a base mesh layer is concentrated and is provided with at least two-layer, has greatly improved papermaking woollen blanket's appearance water space to keep the dryness fraction of paper, reduce the anti-wetting of paper.

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 an overall structure of a papermaking felt according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of the distribution of layers of a papermaking felt according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of an elastomer layer according to an embodiment of the present invention.

FIG. 1-face fiber web layer; 2-inner fiber net layer; 3-an elastomeric layer; 301-a substrate; 302-mesh; a 4-base web layer; 401-warp threads; 402-weft; 5-backside fiber web layer.

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.

An object of the utility model is to provide a papermaking felt based on net type elastomer has solved among the prior art papermaking felt and still has to go out that the paper moisture content is big behind the expression district, technical problem that rewetting is serious.

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. 1-3, the utility model provides a paper making felt based on grid type elastomer, including the positive fiber web layer 1, the nexine fiber web layer 2, elastomer layer 3, at least two layers of basic web layers 4 and the back fiber web layer 5 that connect gradually from top to bottom, the elastomer means that the vitrification temperature is lower than the room temperature, the elongation at break is > 50%, the polymer material that the resilience is better after external force is removed, elastomer layer 3 is the grid type structure of integrated into one piece, positive fiber web layer 1, nexine fiber web layer 2, elastomer layer 3, basic web layer 4 and back fiber web layer 5 are entangled by needle-punching flocking to form the compact paper making felt fabric with certain tightness, so set up, the elastic body layer 3 is additionally arranged between the inner fiber net layer 2 and the base net layer 4 of the papermaking felt, so that the elastic recovery performance of the papermaking felt is improved, and the service cycle of the papermaking felt is further prolonged. The elastomer layer 3 is provided on the upper portion of the base web layer 4 to improve the overall elasticity of the papermaking felt. The elastomer layer 3 is an integrally formed grid structure, and the upper and lower surfaces thereof are smooth and flat, and have better elasticity and water permeability. When the papermaker's felt and the paper are in the press zone, the paper is pressed, and the water inside the paper flows out into the papermaker's felt, at which time the elastomer layer 3 is pressed and deformed. When the paper making felt and the paper are out of the press area, the elastic body layer 3 has good elasticity and needs to recover deformation, so that the paper making felt can be quickly retracted and expanded (for convenience of understanding, the existing sponge water absorption principle can be referred to), negative pressure is formed on the surface of the paper making felt, the backflow of water in the paper making felt to the paper is greatly reduced, at least two layers are intensively arranged on the base net layer 4, the requirement of large-amount dehydration in unit time at high speed is greatly met, the water containing space of the paper making felt can be improved, the dryness of the paper is kept, the dewetting of the paper is reduced, the drying cost of a paper machine is reduced, the effects of saving energy and reducing consumption are achieved, and the technical problems that the moisture content of paper sheets is large and the dewetting is serious after the paper is out of the press area.

As an optional implementation manner of the embodiment of the present invention, the material of the elastomer layer 3 is a thermoplastic elastomer, i.e. TPE, which is a material with high elasticity, high strength and high resilience of rubber.

Furthermore, the material of the elastomer layer 3 is thermoplastic polyurethane elastomer, i.e. TPU, which is mainly classified into polyester type and polyether type, and it HAs wide hardness range (60HA-85HD), wear resistance, oil resistance, transparency, and good elasticity, and HAs been widely used in many fields. The thermoplastic elastomer series is a semi-finished product with large roll, sheet, end and width range of about 1 meter, namely the grid TPU is in a certain width state, the length can reach 500-1000 meters, the grid TPU can be matched with the base mesh layer 4 in a splicing mode and is needled and flocked with the front fiber mesh layer 1, the inner fiber mesh layer 2 and the back fiber mesh layer 5 to form a strong and elastic papermaking felt, and a user can splice the thermoplastic elastomer sheet materials into the papermaking felt with specific length and width required by the user by adopting a spiral splicing technology.

As an optional implementation manner of the embodiment of the present invention, the thickness of the elastomer layer 3 is 0.3mm-1.0mm, and the whole papermaking felt is prevented from being too thick while having sufficient elasticity.

As an optional implementation manner of the embodiment of the present invention, the base mesh layer 4 includes a plurality of parallel warps 401 and a plurality of parallel wefts 402, and the plurality of warps 401 and the plurality of wefts 402 are woven into a net, i.e. the base mesh layer 4 is woven by the plurality of warps 401 and the wefts 402, preferably, the warps 401 and the wefts 402 can be woven along mutually perpendicular directions to form an annular closed structure, and the length and the width can be varied.

Further, warp 401 and weft 402 all set up to single cellosilk or many cellosilks plying to make papermaking felt's crushing resistance better, have better gas permeability and drainage, even use single cellosilk or many cellosilks plying can weave out the papermaking felt of different thickness and specification, with the use needs under the multiple conditions such as adaptation different areas of paper machine and different speeds of a motor vehicle.

Referring to fig. 3, further, the elastic body layer 3 includes a substrate 301 and a plurality of meshes 302, the plurality of meshes 302 are arranged side by side on the elastic substrate 301, and the meshes 302 are distributed to extend along the arrangement direction of the warp 401 or the weft 402, so that the extending and retracting directions of the elastic body layer 3 are parallel to and coincident with the weaving arrangement direction of the warp 401 or the weft 402.

As the embodiment of the utility model provides an optional implementation mode, the material of base net layer 4 can be but not limited to for nylon fiber, polyethylene fiber, polypropylene fiber or polyester net in one kind or several kinds of combinations, preferably, the material of base net layer 4 is nylon fiber, its mechanical strength is high, toughness is good, has higher tensile, compressive strength, and has better wearability and fatigue resistance.

As an optional implementation manner of the embodiment of the present invention, the material of the front fiber web layer 1, the inner fiber web layer 2, and the back fiber web layer 5 may be, but not limited to, one or a combination of nylon 6 fiber, nylon 66 fiber, or polyester fiber.

Further, the fiber fineness of the front fiber web layer 1, the inner fiber web layer 2 and the back fiber web layer 5 is reduced from bottom to top in sequence, preferably, the fiber fineness of the front fiber web layer 1 can be 3dtex to 44dtex, the fiber fineness of the inner fiber web layer 2 can be 11dtex to 44dtex, and the fiber fineness of the back fiber web layer 5 is 11dtex to 66dtex, that is, the closer to the paper, the smaller the fiber fineness, the stronger the adsorption effect on water, and further the reduction of water rewet to the paper.

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 mesh-type elastomer-based papermaking felt, comprising: the utility model provides a fabric layer, the fabric layer comprises a front fiber net layer (1), an inner fiber net layer (2), an elastomer layer (3), at least two base net layers (4) and a back fiber net layer (5) that from top to bottom connect gradually, elastomer layer (3) are integrated into one piece's net type structure, front fiber net layer (1) inner fiber net layer (2) elastomer layer (3) base net layer (4) with back fiber net layer (5) are formed through the acupuncture tangle.

2. The papermaking felt based on a mesh-type elastomer according to claim 1, characterised in that the material of the elastomer layer (3) is a thermoplastic elastomer.

3. The papermaking felt based on the mesh-type elastomer according to claim 2, characterized in that the material of the elastomer layer (3) is a thermoplastic polyurethane elastomer.

4. The papermaking felt based on a grid-type elastomer, according to claim 1, characterized in that the thickness of the elastomer layer (3) is 0.3mm-1.0 mm.

5. The papermaking felt based on the mesh-type elastomer according to claim 1, characterized in that the base web layer (4) comprises a plurality of warp threads (401) and a plurality of weft threads (402) arranged side by side, the warp threads (401) and the weft threads (402) being woven into a net.

6. The papermaking felt based on the lattice type elastomer, according to claim 5, characterized in that the warp threads (401) and the weft threads (402) are both provided as a single fiber thread or are plied by a plurality of fiber threads.

7. The papermaking felt based on the mesh-type elastomer according to claim 5, characterized in that the elastomer layer (3) includes a base plate (301) and a plurality of mesh openings (302) juxtaposed on the base plate (301), the mesh openings (302) being distributed extending in the arrangement direction of the warp threads (401) or the weft threads (402).

8. The papermaking felt based on the mesh-type elastomer according to claim 1, wherein the base web layer (4) is made of any one of nylon fiber, polyethylene fiber, polypropylene fiber, or polyester fiber.

9. The papermaking felt based on the mesh-type elastomer according to claim 1, wherein the material of the front fiber web layer (1), the back fiber web layer (2), and the back fiber web layer (5) is any one of nylon 6 fiber, nylon 66 fiber, or polyester fiber.

10. The mesh-type elastomer-based papermaking felt according to claim 9, wherein the fiber fineness of the face fiber web layer (1), the back fiber web layer (2) and the back fiber web layer (5) is reduced from bottom to top in this order.

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