CN219490536U - Quick-expansion papermaking press felt and papermaking machine - Google Patents

Abstract

The present application provides a fast expanding papermaking press felt and a papermaking machine. This papermaking press blanket is including the positive fibrous layer, base cloth layer and the reverse side fibrous layer that stacks gradually the setting, the base cloth layer is including the first base cloth layer and the second base cloth layer of range upon range of setting, first base cloth layer is located between second base cloth layer and the positive fibrous layer, first base cloth layer only comprises warp, the second base cloth layer comprises warp and weft interweave, be provided with the deformation layer between first base cloth layer and the second base cloth layer, be provided with a plurality of via holes on the deformation layer, deformation layer takes place to deform under the exogenic action, resume to original form after the exogenic action disappears. The papermaking press felt has the advantages of simple structure, lower cost and capability of improving the dryness of paper.

Description

Quick-expansion papermaking press felt and papermaking machine

Technical Field

The present application relates to the field of papermaking industry technology, and in particular to a fast expanding papermaking press felt and a papermaking machine.

Background

The papermaking felt is used as an indispensable dehydration material in the papermaking industry and plays roles of dehydrating, supporting paper and decorating the surface of the paper. When the paper machine is operated, the paper blanket is repeatedly extruded in the press area, so that the paper blanket not only needs to have excellent dewatering performance, but also has the characteristics of high strength, good flatness, good compression rebound resilience, good dimensional stability and the like.

The inventors of the present application have found during actual development that prior art papermaking felts fail to rebound rapidly after exiting the press section resulting in a high sheet moisture content.

Disclosure of Invention

The application provides a quick-expansion papermaking press felt and a papermaking machine, which are used for solving the technical problem that the papermaking press felt cannot rebound quickly after exiting a press zone so that the moisture content of paper is large in the prior art.

In order to solve the technical problem, this application provides a quick expansion's papermaking press blanket on one hand, this papermaking press blanket includes, the positive fibrous layer of range upon range of setting in proper order, base cloth layer and reverse side fibrous layer, wherein, the base cloth layer is including the first base cloth layer and the second base cloth layer of range upon range of setting, first base cloth layer is located between second base cloth layer and the positive fibrous layer, wherein, first base cloth layer comprises warp only, the second base cloth layer comprises warp and weft interweaving, be provided with the deformation layer between first base cloth layer and the second base cloth layer, be provided with a plurality of via holes on the deformation layer, deformation takes place for the deformation layer under the exogenic action, resume to original form after the exogenic action disappears.

Further, the plurality of through holes are arranged in an array and are arranged at equal intervals.

Further, the shape of the via hole is round, oval, square, rectangle or diamond.

Further, the thickness of the deformation layer is greater than 0.5mm and less than 1mm.

Further, the deformation layer is a thermoplastic rubber layer.

Further, a filling layer is further arranged on one side, far away from the base cloth layer, of the front fiber layer, and the filling layer is used for filling the concave and gaps on the surface of the front fiber layer.

Further, the filler layer is a polyurethane resin layer.

Further, the warp threads in the first base layer are made up of several strands, each comprising at least three monofilaments.

Further, the warp yarns in the second base fabric layer are strands, and the weft yarns in the second base fabric layer are monofilaments, each strand of filaments comprising at least three monofilaments.

To solve the above-described problems, another aspect of the present application provides a papermaking machine comprising a papermaking press felt of any one of the embodiments described above.

The beneficial effects of the embodiment of the application are that: the utility model provides a be different from prior art's condition, this application provides a quick expansion's papermaking press blanket includes, positive fibrous layer, base cloth layer and reverse side fibrous layer that stacks gradually, the base cloth layer is including the first base cloth layer and the second base cloth layer of range upon range of setting, first base cloth layer is located in the middle of second base cloth layer and the positive fibrous layer, wherein, first base cloth layer comprises warp and weft interweaving, the second base cloth layer comprises warp and weft interweaving, be provided with the deformation layer in the middle of first base cloth layer and the second base cloth layer, be provided with a plurality of via holes on the deformation layer, deformation layer takes place under the exogenic action, resume to the original state after the exogenic action disappears. The paper making press blanket has higher flatness, the drainage channel is not easy to be blocked, and after the paper making press blanket is in a press zone, the deformation layer quickly recovers deformation to enable the paper making press blanket to expand rapidly, so that negative pressure can be formed on the surface of the paper making press blanket, and the dryness of paper is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly introduced below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic illustration of the structure of one embodiment of a quick-expanding papermaking press felt provided herein;

FIG. 2 is a schematic illustration of the structure of another embodiment of a quick-expanding papermaking press felt provided herein.

Detailed Description

The present application will be described in detail with reference to the following detailed description of the embodiments shown in the drawings. However, these embodiments are not intended to limit the present application, and structural, methodological, or functional modifications made by one of ordinary skill in the art based on these embodiments are included within the scope of the present application.

In addition, if there is a description of "first", "second", etc. in the embodiments of the present application, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be regarded as not exist and not within the protection scope of the present application.

Referring to fig. 1, fig. 1 is a schematic structural diagram of an embodiment of a quick-expanding papermaking press felt, specifically, the papermaking press felt 10 includes a front fiber layer 11, a base fabric layer 12 and a back fiber layer 13 stacked in sequence, and the base fabric layer 12 is located between the front fiber layer 11 and the back fiber layer 13. The paper machine is in operation with the face fibre layer 11 in contact with the surface of the paper.

Further, as shown in fig. 1, the base fabric layer 12 includes a first base fabric layer 121 and a second base fabric layer 122 that are stacked, and the first base fabric layer 121 is located between the second base fabric layer 122 and the front fiber layer 11. The application sets up two-layer base cloth layer 12, makes its compression resilience higher, in the use, can not lose elasticity very soon, and is difficult for appearing compaction and hardening's phenomenon.

Further, the first base fabric layer 121 is composed of warp yarns only, that is, the first base fabric layer 121 is a laid-free base fabric layer. The second base layer 122 is comprised of warp and weft interweaves, the second base layer 122 comprising both warp and weft interweaves, the warp and weft interweaving forming the second base layer 122.

The first base fabric layer 121 in this application is provided with only warp threads, and there are no interweaving points of the warp threads and the weft threads, in this way, the flatness of the papermaking press felt 10 can be improved, and even if the front fiber layer 11 is worn during use, the felt mark finally reflected on the paper is small. In addition, since only warp yarns are present on the first base fabric layer 121, the drainage channels of the papermaking press felt 10 are also less prone to clogging.

Further, a deformation layer 14 is provided between the first base fabric layer 121 and the second base fabric layer 122. The deformation layer 14 deforms under the action of external force, and the deformation layer 14 can quickly recover when the external force disappears. That is, the deformation layer 14 has good elasticity. After the paper press felt 10 is discharged from the press zone, the deformation layer 14 is restored, so that the paper press felt 10 can be expanded rapidly, negative pressure is formed on the surface of the paper press felt 10, in this way, dryness of paper can be kept, rewet of the paper is reduced, drying cost of the paper is reduced, energy saving and consumption reduction effects are achieved, and production efficiency can be effectively improved.

Further, the warp threads in the first base fabric layer 121 are made up of several strands, each comprising at least three monofilaments. The warp yarns in the second base fabric layer 122 are strands, the weft yarns in the second base fabric layer 122 are monofilaments, and each strand in the second base fabric layer 122 includes at least three monofilaments.

Further, as shown in fig. 1, the deformation layer 14 is provided with a plurality of through holes 141, and the plurality of through holes 141 may be arranged in an array and equidistantly spaced. In this way, the stress of the deformation layer 14 is made more uniform, thereby improving the flatness of the front fibrous layer 11.

Alternatively, the shape of the via 141 may be circular, oval, square, rectangular, diamond, or the like.

The thickness of the deformation layer 14 is greater than 0.5mm and less than 1. For example, the thickness of the deformation layer 14 may be 0.6mm, 0.7mm, 0.8mm, 0.9mm, or the like.

Further, the deformation layer 14 may be a thermoplastic rubber layer. Thermoplastic rubbers are a class of copolymers or physical mixtures of polymers (typically plastics and rubbers) composed of materials having thermoplastic and elastomeric properties. Thermoplastic rubbers exhibit typical advantages of rubber materials and plastic materials. The benefit of using thermoplastic rubber is the ability to stretch to moderate elongation and recover to near original shape, thus having a longer service life and a better physical range than other materials.

In other embodiments, the deformation layer 14 may also be a thermoplastic polyurethane elastomer rubber layer. The thermoplastic polyurethane elastomer rubber has excellent characteristics of high tension, toughness and aging resistance, is a mature environment-friendly material, is widely applied to the aspects of medical treatment and health, electronic appliances, industry, sports and the like at present, has the characteristics of high strength, good toughness, wear resistance, cold resistance, oil resistance, water resistance, aging resistance, weather resistance and the like which are incomparable with other plastic materials, and has a plurality of excellent functions of high water resistance, moisture permeability, wind resistance, cold resistance, antibacterial property, mildew resistance, warmth retention, ultraviolet resistance, energy release and the like.

Optionally, as shown in fig. 2, a filling layer 15 is further disposed on the side of the front fiber layer 11 away from the base fabric layer 12, and the filling layer 15 is used for filling the surface recesses and gaps of the front fiber layer 11.

The material of the filling layer 15 may be a composite foamed cellular material. The composite microporous foam material is filled on the front fiber layer 11, and the foam material has high porosity and microscopic surface uniformity due to numerous micropores formed by foaming, so that on one hand, the uneven surfaces of pits are flattened, and on the other hand, the air permeability of the papermaking press felt 10 can be improved. For example, the filling layer 15 may be a polyurethane resin layer, that is, the material of the filling layer 15 may be polyurethane resin.

In summary, the paper press felt 10 provided in the present application has higher flatness, the drainage channel is not easy to be blocked, and after the paper press felt 10 is pressed out of the press area, the deformation layer 14 quickly recovers deformation to make the paper press felt 10 expand rapidly, so that negative pressure can be formed on the surface of the paper press felt 10, and the dryness of paper is improved.

The present application also provides a papermaking machine comprising the papermaking press felt 10 of any one of the embodiments described above. The structure of the papermaking press felt 10 is described in any one of the above embodiments and will not be described in detail herein.

It should be understood that although the present disclosure describes embodiments in terms of examples, not every embodiment is provided with a single embodiment, and that this description is for clarity only, and that the skilled artisan should recognize that the embodiments may be combined appropriately to form other embodiments that will be understood by those skilled in the art. The above list of detailed descriptions is only specific to practical embodiments of the present application, and is not intended to limit the scope of the present application, and all equivalent embodiments or modifications that do not depart from the spirit of the present application are included in the scope of the present application.

Claims (10)

1. A quick-expansion papermaking press felt is characterized by comprising a front fiber layer, a base cloth layer and a back fiber layer which are sequentially stacked, wherein the base cloth layer comprises a first base cloth layer and a second base cloth layer which are stacked, the first base cloth layer is positioned between the second base cloth layer and the front fiber layer,

the first base cloth layer is only composed of warps, the second base cloth layer is composed of warps and wefts in an interweaved mode, a deformation layer is arranged between the first base cloth layer and the second base cloth layer, a plurality of through holes are formed in the deformation layer, deformation occurs under the action of external force, and the deformation layer returns to an original state after the action of external force disappears.

2. The papermaking press felt according to claim 1, wherein the plurality of through holes are arranged in an array and are equidistantly spaced.

3. The papermaking press felt according to claim 2, wherein the shape of the through holes is circular, oval, square, rectangular or diamond.

4. A papermaking press felt according to any one of claims 1-3, wherein the deformation layer has a thickness of more than 0.5mm and less than 1mm.

5. The papermaking press felt according to claim 1, wherein the deformation layer is a thermoplastic rubber layer.

6. The papermaking press felt according to claim 1, wherein the side of the face fiber layer remote from the base fabric layer is further provided with a filler layer for filling the face fiber layer surface recesses and interstices.

7. The papermaking press felt according to claim 6, wherein the filler layer is a polyurethane resin layer.

8. The papermaking press felt according to claim 1, wherein the warp yarns in the first base layer are comprised of a plurality of filaments, each filament comprising at least three filaments.

9. The papermaking press felt according to claim 1, wherein the warp yarns in the second base layer are strands and the weft yarns in the second base layer are monofilaments, each strand comprising at least three monofilaments.

10. A paper machine comprising the papermaking press felt of any one of claims 1-9.