Antistatic high temperature resistant high performance conveyor flat belt and manufacturing method thereof

Abstract

The present invention provides an antistatic, high-temperature-resistant, high-performance conveyor flat belt, comprising a breathable conveying layer, an adhesive layer, a conductive layer, a high-temperature-resistant fabric layer, and an antistatic transmission layer, which are sequentially bonded from top to bottom. When manufacturing the conveyor flat belt, the upper multi-layer structure and the lower multi-layer structure are first manufactured, and then the upper multi-layer structure and the lower multi-layer structure are sequentially bonded and compounded from top to bottom, wherein the compounding pressure is 4-7MPa, the temperature is 160-170°C, and the time is 6-11min. The present invention eliminates the static electricity generated by long-term friction between the antistatic transmission layer and the roller, and prevents the static electricity from breaking through the present invention to cause damage to the PCBA board conveyed by the breathable conveying layer, and can also eliminate the static electricity of the PCBA board itself, and prevent the static electricity from causing potential harm to the PCBA board. Moreover, the present invention will not soften or deform even if it is in a high-temperature environment for a long time, and the conveying function is realized for a long time.

Description

Technical Field

[0001] The invention relates to the field of conveyor flat belts, in particular to an antistatic, high-temperature-resistant and high-performance conveyor flat belt and a manufacturing method thereof. Background Art

[0002] In the SMT production line, the reflow oven transports the PCBA board to the conveyor, and the conveyor transports the PCBA board to the next station through the conveyor belt. The disadvantage of the conveyor belt in the prior art is that it has weak anti-static ability. The roller in the conveyor drives the conveyor belt through friction. Static electricity is likely to occur after long-term friction between the conveyor belt and the roller. The static electricity will break through the conveyor belt and damage the PCBA board transported on it. Summary of the invention

[0003] The purpose of the present invention is to provide an antistatic, high temperature resistant and high performance conveyor flat belt and a manufacturing method thereof, so as to solve the problems raised in the above background technology.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] The utility model discloses an antistatic high temperature resistant high performance conveying flat belt, comprising an air permeable conveying layer, an adhesive layer, a conductive layer, a high temperature resistant fabric layer and an antistatic transmission layer which are sequentially attached from top to bottom.

[0006] Furthermore, the breathable transport layer includes a breathable surface layer and a breathable bridging connecting layer, and the breathable surface layer is attached to the breathable bridging connecting layer.

[0007] Furthermore, the breathable surface layer is a liquid silicone coating.

[0008] Furthermore, the breathable bridging connection layer is a superfine fiber non-woven fabric.

[0009] Furthermore, the adhesive layer is a polyurethane adhesive layer or a conductive adhesive.

[0010] Furthermore, the conductive layer is a conductive polyurethane coating.

[0011] Furthermore, the high temperature resistant fabric layer is a high-strength polyester fiber woven fabric.

[0012] Furthermore, the antistatic transmission layer is an antistatic polyurethane coating.

[0013] A method for manufacturing an antistatic, high temperature resistant, high performance conveyor flat belt, the manufacturing method comprising the following steps:

[0014] Manufacturing of the upper multi-layer structure: shaping the breathable bridging connection layer; coating a breathable surface layer on one side of the breathable bridging connection layer; coating an adhesive layer on the other side of the breathable bridging connection layer; drying the adhesive layer, wherein the drying temperature is 130-160° C.;

[0015] Manufacturing of the multi-layer structure: shaping the high temperature resistant fabric layer; coating the antistatic transmission layer on one side of the high temperature resistant fabric layer; coating the conductive layer on the other side of the high temperature resistant fabric layer; coating the adhesive layer on the side of the conductive layer facing away from the high temperature resistant fabric layer; drying the adhesive layer, wherein the drying temperature is 160-180°C;

[0016] The upper multi-layer structure and the lower multi-layer structure are sequentially attached and compounded from top to bottom, wherein the compounding pressure is 4-7 MPa, the temperature is 160-170° C., and the time is 6-11 minutes.

[0017] Beneficial effects of the present invention:

[0018] The present invention eliminates static electricity generated by long-term friction between the antistatic transmission layer and the roller, thereby preventing the static electricity from breaking through the present invention and causing damage to the PCBA board transported above the air permeable transport layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 : Schematic diagram of the partial structure of an anti-static, high-temperature-resistant and high-performance conveyor flat belt.

[0020] Figure 2 : A schematic diagram of the manufacturing process of an anti-static, high-temperature-resistant, high-performance conveyor flat belt.

[0021] Figure 3 : Example table of manufacturing parameters for an anti-static, high temperature resistant, high performance conveyor flat belt. DETAILED DESCRIPTION

[0022] The present invention will be further described below in conjunction with the accompanying drawings:

[0023] Please refer to Figure 1 , an antistatic, high-temperature-resistant, high-performance conveyor flat belt, comprising a breathable conveying layer, an adhesive layer 3, a conductive layer 4, a high-temperature-resistant fabric layer 5 and an antistatic transmission layer 6 which are sequentially laminated from top to bottom.

[0024] The breathable transport layer comprises a breathable surface layer 1 and a breathable bridging connection layer 2 . The upper surface of the breathable surface layer 1 is provided with patterns for increasing adhesion. The breathable surface layer 1 is attached to the breathable bridging connection layer 2 .

[0025] The breathable surface layer 1 is a liquid silicone coating, which has the advantages of good air permeability, high temperature resistance, good thermal stability, not easy to age and good resilience. In addition, the liquid silicone coating can produce greater adhesion to the PCBA board being transported, thereby improving the stability of the PCBA board position.

[0026] The breathable bridging connecting layer 2 is a microfiber non-woven fabric, which has the advantages of good air permeability, good softness, strong toughness and good buffering effect. The fibers of the microfiber non-woven fabric are very fine and dense. The liquid silicone coating can penetrate into the microfiber non-woven fabric and be firmly fixed by its fibers, thereby improving the peeling resistance of the breathable surface layer 1.

[0027] The adhesive layer 3 is one of a polyurethane adhesive layer 3, a conductive adhesive, and an antistatic adhesive.

[0028] The conductive layer 4 is a conductive polyurethane coating, which includes a polyurethane coating and conductive carbon black. The polyurethane coating and the conductive carbon black are uniformly mixed and cross-linked to form a conductive film.

[0029] The location of the conveyor is close to the reflow soldering furnace, so that the present invention is in a high-temperature environment. The high-temperature resistant fabric layer 5 is a skeleton structure used to determine the shape and size of the present invention. It is a high-strength polyester fiber fabric, which has the advantages of high temperature resistance, high tensile strength, not easy to stretch and stable size. Even if it is in a high-temperature environment for a long time, it will not soften or deform, and finally the transmission function is realized for a long time. The high-temperature resistant fabric layer 5 can also be one of polyester-cotton fiber fabric, aramid fiber fabric, and acrylic fiber fabric.

[0030] The high temperature resistant fabric layer 5 is highly soft, and the present invention can be mounted on a roller with a smaller diameter, and the roller can be driven by a motor with a smaller power. The roller with a smaller diameter and the motor with a smaller power are cheaper, which reduces the manufacturing cost of the conveyor.

[0031] The antistatic transmission layer 6 is an antistatic polyurethane coating, which includes polyurethane coating and nano-scale antistatic conductive carbon black. The polyurethane coating and the antistatic conductive carbon black are uniformly mixed and cross-linked to form an antistatic conductive film.

[0032] The polyurethane in the polyurethane coating has good wear resistance, and the nano-scale antistatic conductive carbon black will not be ground into powder due to friction, and finally the antistatic transmission layer 6 that is in long-term friction with the roller will not be ground into powder.

[0033] Antistatic conductive carbon black will not volatilize under heat like antistatic agent, which ensures that the antistatic property of antistatic transmission layer 6 is effective for a long time in high temperature environment. The antistatic transmission layer 6 can eliminate the static electricity generated by long-term friction with the roller, preventing the static electricity from breaking through the present invention and damaging the PCBA board transmitted thereon.

[0034] When the PCBA board transported by the breathable conveying layer carries static electricity, due to the air permeability of the breathable conveying layer, the static electricity can first be conducted downward through the air in the breathable conveying layer, and then pass through the adhesive layer 3, the conductive layer 4 and the high temperature resistant fabric layer 5 to reach the antistatic transmission layer 6 for rapid leakage, thereby eliminating the static electricity of the PCBA board itself and preventing the static electricity from causing potential harm to the PCBA board.

[0035] In addition, the heat generated by the friction between the present invention and the roller and the high temperature environment can heat the air-permeable transport layer, and the air-permeable transport layer becomes loose after being heated, so that the air permeability is better and the electrostatic conductivity is enhanced.

[0036] Please refer to Figure 2 , a method for manufacturing an antistatic, high temperature resistant and high performance conveyor flat belt, the manufacturing method comprising the following steps:

[0037] Manufacturing of the upper multi-layer structure: shaping the breathable bridging connection layer 2; coating the breathable surface layer 1 on one side of the breathable bridging connection layer 2; curing and shaping the breathable surface layer 1 in an oven; coating the adhesive layer 3 on the other side of the breathable bridging connection layer 2, wherein the coating speed of the adhesive layer 3 is controlled by a variable frequency speed regulator, and the frequency of the variable frequency speed regulator is 15-20 Hz; drying the adhesive layer 3 in an oven, wherein the oven temperature is 130-160° C.;

[0038] Manufacturing of the lower multilayer structure: shaping the high temperature resistant fabric layer 5; coating the antistatic transmission layer 6 on one side of the high temperature resistant fabric layer 5 at a coating temperature of 170-190°C; coating the conductive layer 4 on the other side of the high temperature resistant fabric layer 5 at a coating temperature of 170-190°C; coating the adhesive layer 3 on the side of the conductive layer 4 facing away from the high temperature resistant fabric layer 5, wherein the coating speed of the adhesive layer 3 is controlled by a variable frequency speed regulator, and the frequency of the variable frequency speed regulator is 10-15Hz; drying the adhesive layer 3 in an oven, wherein the oven temperature is 160-180°C;

[0039] The upper multi-layer structure and the lower multi-layer structure are sequentially attached and compounded from top to bottom, wherein the compounding can be carried out by a drum vulcanizer with a compounding pressure of 5-7MPa, a temperature of 160-170°C, and a time of 6-11min, or by a flat-plate compounding machine with a compounding pressure of 4-6MPa, a temperature of 160-170°C, and a time of 6-11min; after the compounding is completed, the coil is wound up with a winder.

[0040] Figure 3 Four groups of manufacturing parameter examples of the present invention are given.

[0041] The above does not limit the technical scope of the present invention in any way. Any modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. An anti-static, high temperature resistant and high performance conveyor flat belt, characterized by: It includes a breathable transport layer, an adhesive layer, a conductive layer, a high temperature resistant fabric layer and an antistatic transmission layer which are sequentially laminated from top to bottom; The breathable transport layer comprises a breathable surface layer and a breathable bridging connecting layer, and the breathable surface layer is attached to the breathable bridging connecting layer; The breathable surface layer is a liquid silicone coating; The breathable bridging connection layer is a superfine fiber non-woven fabric; The conductive layer is a conductive polyurethane coating; The high temperature resistant fabric layer is a high-strength polyester fiber fabric; The antistatic transmission layer is an antistatic polyurethane coating.

2. The method for manufacturing an antistatic, high temperature resistant and high performance conveyor flat belt according to claim 1, characterized in that: The manufacturing method comprises the following steps: Manufacturing of the upper multi-layer structure: shaping the breathable bridging connection layer; coating a breathable surface layer on one side of the breathable bridging connection layer; Coating an adhesive layer on the other side of the breathable bridging connection layer; drying the adhesive layer; Manufacturing of the multi-layer structure: shaping the high temperature resistant fabric layer; coating the antistatic transmission layer on one side of the high temperature resistant fabric layer; coating the conductive layer on the other side of the high temperature resistant fabric layer; coating the adhesive layer on the side of the conductive layer facing away from the high temperature resistant fabric layer; drying the adhesive layer; The upper multi-layer structure and the lower multi-layer structure are sequentially attached and compounded from top to bottom, wherein the compounding pressure is 4-7 MPa, the temperature is 160-170° C., and the time is 6-11 minutes.

3. The method for manufacturing an antistatic, high temperature resistant and high performance conveyor flat belt according to claim 2, characterized in that: In the manufacture of the above multi-layer structure, the drying temperature of the adhesive layer is 130-160°C.

4. The method for manufacturing an antistatic, high temperature resistant and high performance conveyor flat belt according to claim 2, characterized in that: In the manufacture of the above multi-layer structure, the drying temperature of the adhesive layer is 160-180°C.

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