A type of polyester molded mesh with anti-end cracking

Abstract

This utility model discloses a polyester molding mesh with anti-cracking properties, comprising a base mesh woven from polyester monofilaments or multifilaments, and anti-cracking composite strips set at the edges of the base mesh or at the heat-setting seams. The anti-cracking composite strips are formed by alternating and hot-melting elastic buffer layers and rigid support layers. This utility model significantly reduces the initiation and propagation speed of cracks, extends the life of the mesh, and maintains uniform overall air permeability by implanting an "elastic buffer-rigid support" composite structure in the stress concentration area of ​​the mesh.

Description

Technical Field

[0001] This utility model belongs to the field of polyester molding mesh technology, and in particular relates to a polyester molding mesh with anti-end cracking. Background Technology

[0002] Existing polyester forming wire mesh is prone to stress concentration at its longitudinal edges and seams under high temperature, high humidity, and cyclic stretching conditions, leading to cracking of the wire mesh surface. Cracking reduces paper sheet forming quality, shortens wire mesh life, increases downtime for replacement, and consequently raises production costs. Currently, thickening the edges or using secondary heat setting are often used to delay cracking, but the effects are limited and can easily cause new defects such as edge thickening and uneven air permeability. Utility Model Content

[0003] To address the problems existing in the prior art, this utility model provides a crack-resistant polyester molded mesh that significantly reduces the rate of crack initiation and propagation, extends the life of the mesh, and maintains uniform overall air permeability by implanting an "elastic buffer-rigid support" composite structure in the stress concentration area of ​​the mesh.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a polyester molding mesh with anti-cracking properties, comprising a base mesh woven from polyester monofilaments or multifilaments, and anti-cracking composite strips provided at the edges of the base mesh or at the heat-setting seams, wherein the anti-cracking composite strips are formed by alternating and hot-melting of elastic buffer layers and rigid support layers.

[0005] Preferably, the elastic buffer layer is a low-modulus thermoplastic polyester elastomer film with a thickness of 0.15 mm to 0.30 mm.

[0006] Preferably, the rigid support layer is a high-modulus polyethylene terephthalate flat filament bundle with a filament width of 0.3mm to 0.5mm and a gap of 0.1mm to 0.2mm between the flat filaments.

[0007] Preferably, the number of layers of the elastic buffer layer and the rigid support layer is 1 to 3.

[0008] Compared with the prior art, the beneficial effects of this utility model are:

[0009] By implanting an "elastic buffer-rigid support" composite structure in the stress concentration area of ​​the mesh, the rate of crack initiation and propagation is significantly reduced, the life of the mesh is extended, and the overall air permeability is kept uniform. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of this utility model.

[0011] Figure 2 This is a schematic diagram of the anti-cracking composite strip structure of this utility model. Detailed Implementation

[0012] 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.

[0013] 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

[0014] See appendix Figure 1-2 As shown, a type of polyester molding mesh with anti-cracking features includes a base mesh woven from polyester monofilaments or multifilaments, and anti-cracking composite strips are provided at the edges of the base mesh or at the heat-setting seams. The anti-cracking composite strips are formed by alternating and hot-melting elastic buffer layers and rigid support layers.

[0015] Preferably, the elastic buffer layer is a low-modulus thermoplastic polyester elastomer film with a thickness of 0.15 mm to 0.30 mm.

[0016] Preferably, the rigid support layer is a high-modulus polyethylene terephthalate flat filament bundle with a filament width of 0.3mm to 0.5mm and a gap of 0.1mm to 0.2mm between the flat filaments.

[0017] Preferably, the number of layers of the elastic buffer layer and the rigid support layer is 1 to 3.

[0018] A base layer mesh 1 is woven in a 1:1 plain weave using 0.25mm diameter PET monofilaments with a mesh size of 50 meshes. Anti-cracking composite strips 2, each 15mm wide, are installed along the longitudinal edges of both sides of the base layer mesh 1. The elastic buffer layer 21 is made of TPEE film with a thickness of 0.20mm; the rigid support layer 22 is made of PET flat filament bundles with a width of 0.4mm and a thickness of 0.05mm, with a 0.15mm gap 23 between the flat filaments. The two layers are bonded together using a hot roller at 180℃ and a pressure of 0.3MPa to form a composite strip 2 with a total thickness of 0.45mm. Subsequently, a 35kHz ultrasonic welding head is used to weld the overlapping area of ​​the base layer mesh and the composite strip in a 6mm×6mm array, with weld points 3 having a diameter of 1mm. Finally, trapezoidal stress dispersion holes 4, 4mm long, 1.5mm wide, and with an included angle of 40°, are processed on the inner side of the base layer mesh using laser cutting. Through actual operation of the paper machine, the polyester forming wire mesh of this embodiment showed no visible cracks after 60 days of continuous operation under the same working conditions, while the average lifespan of the traditional wire mesh is 18 days.

[0019] Working principle: By implanting an "elastic buffer-rigid support" composite structure in the stress concentration area of ​​the mesh, the initiation and propagation speed of cracks is significantly reduced, the life of the mesh is extended, and the overall air permeability is kept uniform.

[0020] 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.

[0021] 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 type of polyester molded mesh for preventing end cracking, comprising a base mesh (1) woven from polyester monofilaments or multifilaments, characterized in that: Anti-cracking composite strips (2) are provided at the edge of the base layer mesh (1) or at the heat-setting joint. The anti-cracking composite strips (2) are formed by alternating and hot-melting of elastic buffer layer (21) and rigid support layer (22).

2. The anti-end cracking polyester molded mesh according to claim 1, characterized in that: The elastic buffer layer (21) is a low-modulus thermoplastic polyester elastomer film with a thickness of 0.15mm to 0.30mm.

3. The anti-end cracking polyester molded mesh according to claim 1, characterized in that: The rigid support layer (22) is a high-modulus polyethylene terephthalate flat filament bundle with a width of 0.3 mm to 0.5 mm and a gap of 0.1 mm to 0.2 mm between the flat filaments (23).

4. The anti-end cracking polyester molded mesh according to claim 1, characterized in that: The number of layers of the elastic buffer layer (21) and the rigid support layer (22) is 1 to 3.

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