CN220335580U - Pressure-resistant blanket - Google Patents

Abstract

The application discloses a pressure blanket, the pressure blanket includes: a surface contact layer, a fiber composite layer and a bottom fiber layer; the surface contact layer is used for contacting the paper; the fiber composite layer is positioned on the side of the surface contact layer, which is opposite to the paper; the fiber composite layer comprises a spacing base cloth layer and at least two fiber base cloth layers; wherein a spacer cloth layer is arranged between every two fiber base cloth layers; the fabric structure of the fiber base cloth layer is different from the fabric structure of the interval base cloth layer; the bottom fiber layer is positioned on one side of the fiber composite layer, which is away from the surface contact layer; wherein the surface contact layer, the fiber composite layer and the bottom fiber layer are arranged in a lamination manner; the surface contact layer contacts one fiber base cloth layer, and the bottom fiber layer contacts the other fiber base cloth layer. Through the mode, the compression compaction performance of the pressure-resistant blanket is improved, the pressure-resistant blanket is not easy to deform, the void ratio, the air permeability and the resilience force can be improved, and the water backflow is reduced.

Description

Pressure-resistant blanket

Technical Field

The application relates to the technical field of papermaking, in particular to a pressure-resistant blanket.

Background

Papermaking felts are fabric felts used in paper forming and transporting during the press process of a paper machine, which are run with water on the paper machine and press the paper stock to dewater and smooth the paper surface. Therefore, the papermaking felt is required to have a plurality of properties such as good dewatering property, flatness, dimensional stability and elasticity.

However, with the continuous development of the paper industry, the running efficiency and efficiency of the paper machine are gradually improved, which puts higher demands on the paper making felt, but the current paper making felt is weak in compaction resistance, easy to compact and harden after being used for a period of time, and easy to cause the phenomenon of water backflow after absorbing the water of paper, thereby influencing the quality of the paper.

Disclosure of Invention

The technical problem that this application mainly solves is to provide a withstand voltage woollen blanket, can improve withstand voltage real-time ability of withstand voltage woollen blanket for withstand voltage woollen blanket is difficult for taking place to warp, can also improve void fraction and resilience force, and reduces the moisture backward flow.

To solve the above technical problems, one technical solution adopted in the present application is to provide a pressure-resistant blanket, which includes:

a surface contact layer for contacting the paper;

the fiber composite layer is positioned on one side of the surface contact layer, which is opposite to the paper; the fiber composite layer comprises a spacing base cloth layer and at least two fiber base cloth layers; wherein a spacer cloth layer is arranged between every two fiber base cloth layers; the fabric structure of the fiber base cloth layer is different from the fabric structure of the interval base cloth layer;

the bottom fiber layer is positioned on one side of the fiber composite layer away from the surface contact layer;

wherein the surface contact layer, the fiber composite layer and the bottom fiber layer are arranged in a lamination manner; the surface contact layer contacts one fiber base cloth layer, and the bottom fiber layer contacts the other fiber base cloth layer.

The beneficial effects of this application are: in order to solve the problem, the present application discloses a compression resilience that the felt was guaranteed to the setting at least two-layer fibre base cloth layer in the fibre composite layer of pressure-resistant felt, when pressure-resistant felt was through roller extrusion, at least two-layer fibre base cloth layer can play the supporting role in pressure-resistant felt, supporting surface contact layer and bottom fibrous layer for surface contact layer and bottom fibrous layer can not imbed each other in the space of other side. Moreover, this application still sets up the interval base cloth layer in the middle of the fibre base cloth layer of every two-layer, and the fabric structure of fibre base cloth layer is different with the fabric structure that will separate the base cloth layer, consequently, the withstand voltage woollen blanket is when receiving the extrusion, fibre base cloth layer can not imbed the space in the fabric structure and be compacted each other because there is the separation of interval base cloth layer, thereby promote withstand voltage woollen blanket's compaction performance and resilience, make withstand voltage woollen blanket be difficult for taking place to warp, also can make the difficult backward flow to the surface contact layer behind the fibre composite bed of moisture.

Drawings

FIG. 1 is a schematic view of a construction of an embodiment of a pressure felt of the present application;

FIG. 2 is a schematic view of a fiber composite layer in an embodiment of the pressure felt of the present application.

Detailed Description

The following description of the technical solutions in the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.

With the continuous development of the paper industry, the running efficiency and efficiency of a paper machine are gradually improved, but the paper machine has higher requirements on the paper blanket, but the current paper blanket has weak compaction resistance, is easy to compact and harden after being used for a period of time, and the produced paper has more blanket marks and has great improvement space for the quality of the paper. In order to solve the above-described problems, the present application proposes the following embodiments.

The following is an exemplary description of an embodiment of a pressure felt.

As shown in fig. 1 to 2, the pressure felt 10 may include a surface contact layer 100, a fiber composite layer 200, and a bottom fiber layer 300. Wherein the surface contact layer 100, the fiber composite layer 200 and the bottom fiber layer 300 are in a stacked arrangement. The surface contact layer 100 is for contacting a sheet of paper. The fibrous composite layer 200 is located on the side of the surface contact layer 100 facing away from the paper and the underlying fibrous layer 300 is located on the side of the fibrous composite layer 200 facing away from the surface contact layer 100.

Specifically, the side of the surface contact layer 100 facing away from the fiber composite layer 200 contacts and supports the paper. And during the papermaking process, the surface contact layer 100 is capable of absorbing moisture on the paper sheet to facilitate dewatering of the paper sheet.

In some embodiments, the surface contact layer 100 may include a fleece layer 110 and a surface coating 120. The surface coating 120 may be located on one side of the fleece layer 110 to fill the interstices of the facing surface of the fleece layer 110. The surface coating 120 can make the surface of the surface contact layer 100 contacting the paper smoother, so as to reduce the indentation of the pressure felt 10 on the paper, and further improve the quality of the paper. Meanwhile, after the surface contact layer 100 absorbs the moisture of the paper, since the surface coating layer 120 fills the gap between the fleece layer 110 and the paper contact surface, the surface coating layer 120 can prevent the moisture in the pressure felt 10 from further flowing back into the paper, thereby reducing the influence of the moisture backflow on the paper quality.

Alternatively, the fiber material of the fleece layer 110 may be nylon, where nylon has the characteristics of high strength, high wear resistance, good rebound resilience, and hygroscopicity, and selecting nylon as the fiber material of the fleece layer 110 can enable the surface contact layer 100 to absorb moisture of paper very well, thereby improving the quality of paper, and also improving rebound resilience and compaction resistance of the pressure-resistant blanket 10, so as to improve the service life of the pressure-resistant blanket 10.

And the surface coating 120 may be a composite foamed cellular material. For example, the surface coating 120 may be polyurethane resin, and the polyurethane resin is selected as the material of the surface coating 120, so that the surface coating 120 has stronger stability and rebound resilience, and further, the surface contact layer 100 is not easy to react with paper to affect the quality of the paper when contacting the paper, and the pressure-resistant blanket 10 is not easy to deform.

The fiber composite layer 200 is used for absorbing moisture of the flow guiding surface contact layer 100 and separating the surface contact layer 100 from the bottom fiber layer 300 to elastically support the surface contact layer 100, so that the surface contact layer 100 and the bottom fiber layer 300 are not easy to be embedded into each other to generate compaction, hardening and other phenomena in the extrusion process of the pressure blanket 10, thereby ensuring compression resilience and compaction resistance of the pressure blanket 10 and further prolonging the service life of the pressure blanket 10.

As shown in fig. 1-2, the fiber composite layer 200 includes a spacer base layer 210 and at least two fiber base layers 220. Wherein, a spacer cloth layer 210 is disposed between every two fiber cloth layers 220. The fabric structure of the fibrous base fabric layer 220 is different from that of the spacer base fabric layer 210.

For example, in one embodiment, as shown in fig. 2, the number of fiber-based layers 220 may be two, and the spacer-based layer 210 is disposed between the two fiber-based layers 220 to space the two fiber-based layers 220 apart. Alternatively, the number of the fiber-based fabric layers 220 may be three, and the number of the spacer-based fabric layers 210 may be correspondingly two, where the two spacer-based fabric layers 210 are respectively disposed in two gaps of the three fiber-based fabric layers 220. Of course, the number of fibrous base fabric layers 220 and spacer base fabric layers 210 may also be other values, not specifically recited herein.

Alternatively, the fiber-based fabric layer 220 and the spacer-based fabric layer 210 may be stacked, and the stacking direction of the fiber-based fabric layer 220 and the spacer-based fabric layer 210 may be identical to the stacking direction of the surface contact layer 100, the fiber composite layer 200, and the bottom fiber layer 300.

Specifically, the surface contact layer 100 contacts one fiber-based fabric layer 220 and the bottom fiber layer 300 contacts the other fiber-based fabric layer 220. Wherein the side of the fleece layer 110 facing away from the surface coating 120 may be in contact with the fiber-based cloth layer 220 and may be bonded to the fiber-based cloth layer 220 by adhesive heat setting. The provision of at least two fiber base cloth layers 220 in the pressure felt 10 can further increase the rebound resilience and the compaction resistance of the pressure felt 10, so that the water containing space of the fiber composite layer 200 is larger, which can facilitate the rapid transfer of moisture from the surface contact layer 100 to the fiber composite layer 200.

However, since the fiber base fabric layers 220 have the same fabric structure, each fiber base fabric layer 220 may be dislocated from another fiber base fabric layer 220 in contact with the fiber base fabric layer 220 during the curling or use of the pressure-resistant blanket 10, so that the gaps of the contact surfaces between the fiber base fabric layers 220 may be mutually embedded, and further compacted during the repeated pressing and use. The spacer fabric layers 210 may be used to space the fiber base fabric layers 220 apart so that the two fiber base fabric layers 220 are not easily engaged with each other and are compacted, thereby increasing the compaction resistance and resilience of the pressure blanket 10 to increase the service life of the pressure blanket 10. In addition, due to the barrier of the spacer cloth layer 210, moisture is not easily reflowed to the surface contact layer 100 to wet the paper after flowing to the bottom fiber layer 300 through the surface contact layer 100 and the fiber composite layer 200, so that the quality of the paper can be improved.

In some embodiments, the fabric structure of the fiber-based fabric layer 220 may be a two-way or multi-way weave structure, and the fabric structure of the spacer-based fabric layer 210 may be a unidirectional weave structure. The bi-or multi-knit fibrous base layer 220 can have a greater void fraction and air permeability such that the fibrous composite layer 200 can have a greater water holding capacity to attract water from the guide surface contact layer 100 and can also increase the resiliency of the fibrous base layer 220. The unidirectional woven spacer base fabric layer 210 has a smaller void ratio, so that the respective fiber base fabric layers 220 can be well spaced apart, and the occurrence of mutual embedding between the spacer base fabric layer 210 and the fiber base fabric layer 220 can be reduced, thereby increasing the compaction resistance and rebound performance of the pressure-resistant blanket 10.

For example, in some embodiments, the fibrous base fabric layer 220 may be woven from both warp and weft directions, and the spacer fabric layer 210 may be a laid-out base fabric layer. The fiber base cloth layer 220 is arranged in this way, so that the fiber base cloth layer 220 has good air permeability and rebound resilience, and the surface of the fabric is flat and fine, so that the water filtering effect and the flatness of the pressure-resistant blanket 10 are improved.

Of course, in other embodiments, the fabric structures of the spacer fabric layer 210 and the fiber base fabric layer 220 may be other fabric structures, for example, the fabric structure of the fiber base fabric layer 220 is a 2/2 twill weave structure, and the spacer fabric layer 210 may be a single layer weft-knitted fabric base fabric layer, where specific limitations of the fabric structures of the spacer fabric layer 210 and the fiber base fabric layer 220 are not made.

In some embodiments, the weft of the fiber-based cloth layer 220 may be monofilaments or strands, and the warp of the fiber-based cloth layer 220 is monofilaments or strands. The spacer base fabric layer 210 may be a laid base fabric layer made by ply-bonding.

For example, as shown in fig. 2, the weft and warp of the fiber-based fabric layer 220 may be single threads, and the spacer-based fabric layer 210 may be a laid-up fabric layer made of a plurality of single threads. The single-thread weft and warp can make the fiber base cloth layer 220 easier to manufacture and produce, and can reduce the manufacturing cost of the fiber base cloth. The spacer base layer 210 made of the strands can make the structure of the spacer base layer 210 more compact and stable, and is not easy to deform due to extrusion of the fiber base layer 220, so that the rebound performance can be improved. And compared with single-wire manufacturing, the spacer base cloth layer 210 manufactured by the strands has higher void ratio, so that the spacer base cloth layer 210 has better water filtering effect, and the water filtering effect of the pressure-resistant blanket 10 can be improved.

In some embodiments, the fineness of the fibrous material of the fibrous base cloth layer 220 is greater than the fineness of the fibrous material of the spacer base cloth layer 210. Alternatively, the fineness of the fiber material of the fiber base cloth layer 220 is the fineness of the warp and weft in the fiber base cloth layer 220, and the fineness of the fiber material of the spacer base cloth layer 210 refers to the fineness of the strands of the spacer base cloth layer 210.

Specifically, since the fineness of the fiber material can affect the void ratio of the pressure-resistant felt 10, the fineness of the fiber material of the spacer base cloth layer 210 is smaller than that of the fiber material of the fiber base cloth layer 220, which can effectively reduce the occurrence of the situation that the fiber base cloth layer 220 is embedded into the void of the spacer base cloth layer 210, so that the spacer base cloth layer 210 can well space different fiber base cloth layers 220, thereby increasing the rebound resilience of the pressure-resistant felt 10. Further, the fineness of the fibrous material of the spacer base cloth layer 210 is smaller than that of the fibrous base cloth layer 220, it may be explained that the void ratio of the fibrous base cloth layer 220 is larger than that of the spacer base cloth layer 210, so that it may be difficult for moisture to flow back from another fibrous base cloth layer 220 to the spacer base cloth layer 210 after passing through the surface contact layer 100 and passing through the fibrous base cloth layer 220 and the spacer base cloth layer 210 near the surface contact layer 100.

Alternatively, the fineness of the fibrous material of the fleece layer 110 may be smaller than that of the fibrous base cloth layer 220. The fineness of the fiber material of the fiber base layer 220 may be smaller than that of the fiber material of the bottom fiber layer 300. By doing so, the surface of the fleece layer 110 can be made smoother, and under the cushioning of the fleece layer 110, the impression of the fiber base layer 220 on the paper can be reduced. Meanwhile, the arrangement can also make the water filtering effect of the fiber base cloth layer 220 better, so that the water can quickly flow out of the blanket through the bottom fiber layer 300 after entering the fiber composite layer 200 through the fleece layer 110, and the water is not easy to stay in the fiber composite layer 200 and soak for a long time to damage the fiber composite layer 200, and is also not easy to flow back to the fleece layer 110 to wet paper.

In some embodiments, the fibrous material of fleece layer 110 may have a fineness range of 8 25d. The fineness of the fibrous material of the fibrous base cloth layer 220 may range from 20 50d. The fineness of the fibrous material of the spacer base layer 210 may range from 15 35d. The fineness of the fibrous material of the bottom fibrous layer 300 may range from 35 70d. For example, the fineness of the fiber material of the fleece layer 110 may be 8D, 15D, 20D, the fineness of the fiber material of the fiber base layer 220 may be 25D, 28D, 45D, the fineness of the fiber material of the spacer base layer 210 may be 17D, 20D, 30D, and the fineness of the fiber material of the underlying fiber layer 300 may be 37, 50D, 65D.

In some embodiments, the fibrous material of the fibrous base fabric layer 220 and the fibrous material of the bottom fibrous layer 300 may be nylon. The nylon has the characteristics of high strength, high wear resistance, good rebound resilience and hygroscopicity, and the fiber material of the fiber base cloth layer 220, the wool net layer 110 of the surface contact layer 100 and the bottom fiber layer 300 are arranged to be the same material, so that the processing and the fixation among the layers can be facilitated.

And the fibrous material of the spacer cloth layer 210 may be wool-like polyester. Wherein the wool-like yarn has excellent air permeability and softness, and can improve the air permeability and flatness of the spacer cloth layer 210, thereby improving the flatness and air permeability of the pressure-resistant felt 10.

In some embodiments, the surface contact layer 100 and the fiber composite layer 200, the fiber composite layer 200 and the bottom fiber layer 300 are all adhesively secured by adhesive heat setting. Because the surface contact layer 100 contacts the fleece layer 110 of the fiber composite layer 200 and the bottom fiber layer 300 are all made of cotton, the surface of the fleece layer 110, the fiber composite layer 200 and the bottom fiber can be melted by adopting a heat setting mode, so that the surface of the fleece layer 110, the fiber composite layer 200 and the bottom fiber can be mutually bonded, and the bonding and fixing effects can be realized.

In summary, at least two fiber-based fabric layers 220 are disposed in the fiber composite layer 200 of the pressure felt 10 to ensure compression resilience of the papermaking felt, and the surface contact layer 100 and the bottom fiber layer 300 are supported so that the surface contact layer 100 and the bottom fiber layer 300 are not embedded into each other in the gaps. In addition, the spacer fabric layer 210 is further disposed between each two fiber base fabric layers 220, and the fabric structure of the fiber base fabric layers 220 is different from the fabric structure of the spacer fabric layers 210, so that when the pressure-resistant blanket 10 is extruded, the fiber base fabric layers 220 are not mutually embedded into the gaps of the fabric structure due to the blocking of the spacer fabric layers 210, so that the compaction resistance and rebound resilience of the pressure-resistant blanket 10 are improved, and water is not easy to flow back to the surface contact layer 100 after passing through the fiber composite layer 200. While at the same time. The surface coating 120 is further arranged on one surface, contacted with the paper, of the fleece layer 110 of the surface contact layer 100, so that one surface, contacted with the paper, of the surface contact layer 100 is smoother, the indentation of the pressure blanket 10 on the paper can be reduced, the quality of the paper is improved, and the influence of moisture backflow on the quality of the paper can be reduced.

The foregoing description is only exemplary embodiments of the present application and is not intended to limit the scope of the present application, and all equivalent structures or equivalent processes using the descriptions and the drawings of the present application, or direct or indirect application in other related technical fields are included in the scope of the present application.

Claims (10)

1. A pressure felt, comprising:

a surface contact layer for contacting the paper;

the fiber composite layer is positioned on the side of the surface contact layer, which is opposite to the paper; the fiber composite layer comprises a spacing base cloth layer and at least two fiber base cloth layers; wherein a layer of the spacer cloth layer is arranged between every two layers of the fiber base cloth layers; the fabric structure of the fiber base cloth layer is different from the fabric structure of the spacer cloth layer;

the bottom fiber layer is positioned on one side of the fiber composite layer away from the surface contact layer;

wherein the surface contact layer, the fiber composite layer and the bottom fiber layer are arranged in a lamination manner; the surface contact layer contacts one of the fiber-based fabric layers, and the bottom fiber layer contacts the other fiber-based fabric layer.

2. The pressure felt according to claim 1, wherein:

the fabric structure of the fiber base cloth layer is a two-way or multi-way braiding structure, and the fabric structure of the spacer base cloth layer is a one-way braiding structure.

3. The pressure felt according to claim 2, wherein:

the fiber base cloth layer is woven from warp threads and weft threads in two directions, and the interval base cloth layer is a non-weft base cloth layer.

4. A pressure felt according to claim 3, wherein:

the wefts of the fiber base cloth layer are monofilaments or strands, and the warps of the fiber base cloth layer are monofilaments or strands; the interval base cloth layer is a non-woven base cloth layer made of ply-bonding.

5. The pressure felt according to claim 1, wherein:

the fineness of the fiber material of the fiber base cloth layer is larger than that of the fiber material of the spacer cloth layer.

6. The pressure felt according to claim 1, wherein:

the surface contact layer comprises a fleece layer and a surface coating; the surface coating is positioned on one side of the fleece layer and used for filling gaps on the surface of the fleece layer; the side of the fleece layer facing away from the surface coating is in contact with the fiber-based cloth layer and is bonded with the fiber-based cloth layer by adhesive heat setting.

7. The pressure felt according to claim 6, wherein:

the fineness of the fiber material of the fleece layer is smaller than that of the fiber base cloth layer; the fineness of the fiber material of the fiber base cloth layer is smaller than that of the fiber material of the bottom fiber layer.

8. The pressure felt according to claim 6, wherein:

the fineness of the fiber material of the fleece layer is 8-25D; the fineness of the fiber material of the fiber base cloth layer is 20-50D; the fineness of the fiber material of the spacer cloth layer is 15-35D; the fineness of the fiber material of the bottom fiber layer is 35-70D.

9. The pressure felt according to claim 6, wherein:

the fiber material of the fiber base cloth layer and the fiber material of the bottom fiber layer are nylon; the spacer cloth layer is wool-like polyester; the fiber material of the fleece layer is nylon; the surface coating is a composite foaming microporous material.

10. The pressure felt according to claim 1, wherein:

the surface contact layer, the fiber composite layer and the bottom fiber layer are all adhered and fixed through adhesive heat setting.