A multi-layer papermaking felt

Abstract

The utility model discloses a multilayer warp and weft interlaced type papermaking blanket, including papermaking blanket body, the paper blanket body from top to bottom is sequentially arranged surface layer, transition layer, middle layer and bottom, surface layer, transition layer, middle layer and bottom adopt integrated warp and weft interlaced structure, surface layer, transition layer, middle layer and bottom are connected as a whole through the warp yarn of full layer continuous through, and the weft yarn is gradient increasing from surface layer to bottom, surface layer is plain weave interlaced structure, and transition layer is twill interlaced structure, and the weft yarn of surface layer is used as the direct contact layer of paper web and selects smooth polyester yarn, guarantees paper web to hold flatness again, and forms initial dehydration microchannel, reduces pulp fiber adhesion, and transition layer is used as the connecting hinge of surface layer and middle layer, adopts twill interlace, and the weft yarn adopts variable diameter polyester yarn, makes surface layer dense structure and middle layer loose structure smooth transition, avoids the formation of flow dead zone between layers, and strengthens the interlayer bonding strength simultaneously.

Description

Technical Field

[0001] This utility model belongs to the field of papermaking blanket technology, and in particular relates to a multi-layered warp and weft interwoven papermaking blanket. Background Technology

[0002] Multi-layered interwoven papermaking felts are core consumables in the press section of papermaking machines, and their structural design directly determines dewatering efficiency, service life, and paper quality. Currently, most multi-layered papermaking felts employ a simple three-layer stacked structure: a top layer, a middle layer, and a bottom layer.

[0003] In the use of some existing multi-layered warp and weft interwoven papermaking blankets, most of the warp and weft yarns in each layer have a single specification and interweaving method. Each layer of warp yarns is set independently and is only fixed by a small number of connecting yarns. During use, interlayer slippage or separation is likely to occur, resulting in blanket deformation and shortened service life. In order to improve wear resistance, the bottom layer mostly uses high-density interweaving or coarse yarns, but this will block the middle layer flow channels and reduce water permeability. Utility Model Content

[0004] To address the problems existing in the prior art, this utility model provides a multi-layered warp and weft interwoven papermaking felt. The surface layer, which is in direct contact with the paper web, uses smooth polyester yarn for the weft, ensuring the flatness of the paper web and forming initial dewatering microchannels to reduce pulp fiber adhesion. The transition layer, serving as the connecting hub between the surface and middle layers, uses a twill weave with variable diameter polyester yarn for the weft, ensuring a smooth transition between the dense structure of the surface layer and the loose structure of the middle layer, avoiding dead zones between layers, and enhancing the interlayer bonding strength. The bottom layer, serving as a wear-resistant support layer, uses a double-weft plain weave with nylon 66 core-spun yarn for the weft, improving the load-bearing strength and wear resistance of the bottom layer without significantly increasing the overall density.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a multi-layered warp and weft interwoven papermaking blanket, comprising a papermaking blanket body, wherein the papermaking blanket body is provided with a top layer, a transition layer, a middle layer and a bottom layer from top to bottom, wherein the top layer, transition layer, middle layer and bottom layer adopt an integrated warp and weft interwoven structure, wherein the top layer, transition layer, middle layer and bottom layer are connected as a whole by warp yarns that are continuously connected throughout the entire layer, and the weft yarns increase in a gradient from the top layer to the bottom layer, wherein the top layer is a plain weave interwoven structure, the transition layer is a twill weave interwoven structure, the middle layer is a satin weave interwoven structure and the bottom layer is a double weft plain weave interwoven structure.

[0006] Furthermore, the weft yarn of the outer layer is smooth polyester yarn, and the weft yarn of the middle layer is hollow polyester yarn.

[0007] Furthermore, the weft yarn of the transition layer is variable diameter polyester yarn, and the weft yarn of the bottom layer is nylon 66 core-spun yarn.

[0008] Compared with the prior art, the beneficial effects of this utility model are: The surface layer, which is in direct contact with the paper web, uses smooth polyester yarn for the weft, ensuring the flatness of the paper web and forming initial dewatering microchannels to reduce pulp fiber adhesion. The transition layer, serving as the connecting hub between the surface and middle layers, uses a twill weave with variable diameter polyester yarn for the weft, ensuring a smooth transition between the dense structure of the surface layer and the loose structure of the middle layer, avoiding dead zones between layers, and enhancing the interlayer bonding strength. The bottom layer, as an abrasion-resistant support layer, uses a double-weft plain weave with nylon 66 core-spun yarn for the weft, improving the load-bearing strength and abrasion resistance of the bottom layer without significantly increasing the overall density. Attached Figure Description

[0009] Figure 1 This is a partial sectional view of the overall structure of this utility model.

[0010] In the diagram: 1. Surface layer; 2. Transition layer; 3. Middle layer; 4. Bottom layer; 5. Papermaking felt body. Detailed Implementation

[0011] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0012] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Example

[0013] See appendix Figure 1 As shown, a multi-layered warp and weft interwoven papermaking blanket includes a papermaking blanket body 5. The papermaking blanket body is arranged from top to bottom as a top layer 1, a transition layer 2, a middle layer 3, and a bottom layer 4. The top layer 1, transition layer 2, middle layer 3, and bottom layer 4 adopt an integrated warp and weft interwoven structure. The top layer 1, transition layer 2, middle layer 3, and bottom layer 4 are connected as a whole by warp yarns that run continuously through the entire layer. The weft yarns increase in a gradient from the top layer 1 to the bottom layer 4. The top layer 1 is a plain weave interwoven structure, the transition layer 2 is a twill weave interwoven structure, the middle layer 3 is a satin weave interwoven structure, and the bottom layer 4 is a double-weft plain weave interwoven structure.

[0014] The weft yarn of the outer layer 1 is smooth polyester yarn, and the weft yarn of the middle layer 3 is hollow polyester yarn.

[0015] The weft yarn of transition layer 2 is variable diameter polyester yarn, and the weft yarn of bottom layer 4 is nylon 66 core-spun yarn.

[0016] Working principle: The surface layer 1, which is in direct contact with the paper web, uses smooth polyester yarn for the weft, ensuring the flatness of the paper web and forming initial dewatering microchannels to reduce pulp fiber adhesion. The transition layer 2, which serves as the connecting hub between the surface layer 1 and the middle layer 3, uses a twill weave and variable diameter polyester yarn for the weft, allowing for a smooth transition between the dense structure of the surface layer 1 and the loose structure of the middle layer 3, avoiding dead zones in the flow between layers, and enhancing the interlayer bonding strength. The middle layer 3, as the core flow guiding layer, uses a satin weave and hollow polyester yarn for the weft, replacing the traditional straight channels, improving flow smoothness and preventing fiber accumulation and blockage. The bottom layer 4, as the wear-resistant support layer, uses a double-weft plain weave and nylon 66 core-spun yarn for the weft, improving the load-bearing strength and wear resistance of the bottom layer 4 without significantly increasing the overall density. All layers are integrated and connected by continuous warp yarns, with no breaks in the warp yarns throughout the entire layer, forming a tightly integrated overall structure with the weft yarns of each layer.

[0017] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description. Therefore, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this utility model, and no reference numerals in the claims should be construed as limiting the scope of the claims.

[0018] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A multi-layered, interwoven papermaking felt, comprising a papermaking felt body (5), characterized in that: The paper blanket body is arranged from top to bottom as a top layer (1), a transition layer (2), a middle layer (3) and a bottom layer (4). The top layer (1), the transition layer (2), the middle layer (3) and the bottom layer (4) adopt an integrated warp and weft interlacing structure. The top layer (1), the transition layer (2), the middle layer (3) and the bottom layer (4) are connected as a whole by continuous warp yarns throughout the entire layer. The weft yarns increase in a gradient from the top layer (1) to the bottom layer (4). The top layer (1) is a plain weave interlacing structure, the transition layer (2) is a twill weave interlacing structure, the middle layer (3) is a satin weave interlacing structure, and the bottom layer (4) is a double weft plain weave interlacing structure.

2. The multi-layered warp and weft interwoven papermaking blanket according to claim 1, characterized in that: The weft yarn of the outer layer (1) is smooth polyester yarn, and the weft yarn of the middle layer (3) is hollow polyester yarn.

3. The multi-layered warp and weft interwoven papermaking blanket according to claim 1, characterized in that: The weft yarn of the transition layer (2) is a variable diameter polyester yarn, and the weft yarn of the bottom layer (4) is nylon 66 core-spun yarn.

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