Antistatic floor mat, method of production and equipment

Abstract

The application discloses an anti-static floor mat, a production method and equipment, and belongs to the field of floor mat production technology. The anti-static floor mat comprises a conductive rubber layer (1), and the conductive rubber layer (1) is compounded with an insulating rubber layer (2). The insulating rubber layer (2) is embedded with conductive rubber particles (3), and the conductive rubber particles (3) penetrate through the insulating rubber layer (2). The top surface of the conductive rubber particles (3) is flush with the insulating rubber layer (2), the bottom surface of the conductive rubber particles (3) is combined with the conductive rubber layer (1), the bottom of the conductive rubber particles (3) is vulcanized and combined with the conductive rubber layer (1) to form an integrated whole, the periphery of the conductive rubber particles (3) is vulcanized and combined with the insulating rubber layer (2), and the bottom surface of the insulating rubber layer (2) is vulcanized and combined with the conductive rubber layer (1) to form an integrated whole. The anti-static floor mat, the production method and the equipment have the advantages of convenient construction and high reliability of the static conduction function.

Description

Technical Field

[0001] This invention relates to an antistatic floor mat, its production method, and equipment, belonging to the field of rubber material technology. Background Technology

[0002] Currently, in environments such as computer rooms and integrated circuit manufacturing workshops, it is necessary to eliminate static electricity to ensure safety and product quality. To address this, some companies have developed and applied for Chinese patent CN201610224742.1, "An Antistatic Floor Mat," which uses embedded metal wires to release static electricity. However, in practical applications, it has been found that the metal wires have poor bending resistance and are prone to breakage during transportation and installation, leading to failure. To further address this, some companies have proposed Chinese patent CN202021594618.2, "An Antistatic Floor for Computer Rooms," which uses a layered antistatic core board instead of metal wires to conduct static electricity. However, this requires a frame for encapsulation and is then assembled and laid like floor tiles, resulting in a large construction workload and hindering rapid installation. Therefore, a completely new type of antistatic floor mat is urgently needed to solve these problems. Summary of the Invention

[0003] The purpose of this invention is to overcome the above-mentioned shortcomings and provide an antistatic floor mat, a production method and equipment, which have the advantages of convenient construction and high reliability of static electricity conduction function.

[0004] The objective of this invention is achieved as follows:

[0005] An antistatic floor mat includes a conductive rubber layer, an insulating rubber layer laminated on the conductive rubber layer, conductive rubber particles embedded in the insulating rubber layer and penetrating through the insulating rubber layer, the top surface of the conductive rubber particles being flush with the insulating rubber layer, and the bottom surface of the conductive rubber particles being bonded to the conductive rubber layer.

[0006] Preferably, the bottom of the conductive rubber particle is vulcanized and bonded to the conductive rubber layer, the periphery of the conductive rubber particle is vulcanized and bonded to the insulating rubber layer, and the bottom surface of the insulating rubber layer is vulcanized and bonded to the conductive rubber layer.

[0007] An antistatic floor mat production equipment includes a conveyor belt located between an unwinding mechanism and a drum vulcanizing machine. A material feeding mechanism is installed above the conveyor belt along its moving direction. The material feeding mechanism includes a conductive particle feeding mechanism and an insulating particle feeding mechanism. A glue-applying roller is arranged between the conductive particle feeding mechanism and the unwinding mechanism. A pressure roller is arranged between the conductive particle feeding mechanism and the insulating particle feeding mechanism. A brush is arranged between the insulating particle feeding mechanism and the drum vulcanizing machine. The glue-applying roller, the pressure roller, and the brush are all located above the conveyor belt.

[0008] Preferably, the length of the brush is greater than the width of the conveyor belt, and the distance H between the bottom of the brush and the upper surface of the conveyor belt is less than or equal to D + h, where D is the particle size of the conductive rubber particles and h is the thickness of the conductive sheet.

[0009] A method for producing antistatic floor mats, the steps of which are as follows:

[0010] Step 1: Prepare a conductive sheet as the conductive rubber layer;

[0011] Step 2: Apply conductive adhesive to the conductive sheet;

[0012] Step 3: Spread large-diameter conductive rubber particles on the conductive sheet at intervals. At this time, the conductive rubber particles are bonded to the conductive sheet by the conductive adhesive.

[0013] Step 4: Spread small-diameter insulating rubber particles onto the conductive sheet, ensuring that the insulating rubber particles fill the gaps between the conductive rubber particles.

[0014] Step 5: Use a brush to scrape the surface of the semi-finished product after the insulating rubber granules have been spread in Step 4, so that the excess insulating rubber granules can be scraped off or filled between the conductive rubber granules, and prevent them from accumulating on the conductive rubber granules.

[0015] Step Six: The conductive sheet, on which conductive rubber granules and insulating rubber granules are laid, is put into a drum vulcanizing machine for continuous vulcanization to form an antistatic floor mat.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] This invention features a simple structure and produces a roll material that can be directly laid, greatly improving construction efficiency. Furthermore, the roll material, made entirely of rubber, is easy to cut, unlike the wire structures in the prior art which are difficult to cut (the wires are not easily broken during cutting, and the pulling during cutting can cause internal breakage, affecting the antistatic effect). Frame structures cannot be cut arbitrarily (requiring customization). In contrast, this patented rubber roll material can be cut arbitrarily according to the actual laying site without affecting its antistatic effect, ensuring the reliability of its antistatic function. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of an antistatic floor mat according to the present invention.

[0019] Figure 2 This is a flowchart illustrating a method for producing an antistatic floor mat according to the present invention.

[0020] Figure 3 This is a partial schematic diagram of a production equipment for an antistatic floor mat according to the present invention.

[0021] in:

[0022] Conductive rubber layer 1, insulating rubber layer 2, conductive rubber particles 3.

[0023] 101 Conveyor belt, 102 Glue roller, 103 Conductive particle feeding mechanism, 104 Insulating particle feeding mechanism, 105 Pressure roller, 106 Brush. Detailed Implementation

[0024] See Figure 1 The present invention relates to an antistatic floor mat, comprising a conductive rubber layer 1, which is in contact with the ground during use, preferably with a grounding wire on the ground. An insulating rubber layer 2 is laminated on the conductive rubber layer 1, and conductive rubber particles 3 are embedded in the insulating rubber layer 2, with the conductive rubber particles 3 penetrating through the insulating rubber layer 2. The top surface of the conductive rubber particles 3 is flush with the insulating rubber layer 2, and the bottom surface of the conductive rubber particles 3 is vulcanized with the conductive rubber layer 1 to achieve conductive connection. The periphery of the conductive rubber particles 3 is vulcanized with the insulating rubber layer 2 to form an integral whole, and the bottom surface of the insulating rubber layer 2 and the conductive rubber layer 1 are vulcanized to form an integral whole.

[0025] In use, since the conductive rubber layer 1, insulating rubber layer 2, and conductive rubber particles 3 form a single roll, it can be easily laid directly, making construction simple, convenient, and efficient. During laying, it can be cut to size according to the actual site conditions without affecting the anti-static function. After laying, the presence of scattered conductive rubber particles 3 allows static electricity generated during personnel walking to be conducted through the conductive rubber particles 3 to the conductive rubber layer 1 and then quickly released through the bottom surface. Furthermore, equipment placed on the insulating rubber layer 2 will inevitably have scattered conductive rubber particles 3 on the contact surface with the insulating rubber layer 2, reducing static electricity discharge from the equipment. Moreover, by overlapping, anti-static pins on the equipment can be inserted into the conductive rubber particles 3, or into the conductive rubber layer 1, or between the conductive rubber layer 1 and the ground, achieving double protection and ensuring the release of static electricity.

[0026] The above-mentioned antistatic floor mat can be prepared through the following examples:

[0027] Example 1:

[0028] Step 1: Prepare a conductive sheet as conductive rubber layer 1. Conductive sheet is a common material in the prior art as a conductive rubber. For example, the following common ratio can be used: by weight ratio, 100 parts chloroprene rubber or chlorosulfonated polyethylene rubber or a mixture thereof, 5-10 parts metal oxide activator, 1-2 parts accelerator, 1-2 parts anti-scorching agent, 3-6 parts antioxidant, 50-100 parts conductive filler, and 15-45 parts processing oil; and the conductive sheet is in roll form.

[0029] Step 2: Spread conductive rubber particles and insulating rubber particles on the conductive sheet, with the particle size D of the conductive rubber particles being larger than the particle size d of the insulating rubber particles.

[0030] Step 3: The conductive sheet, on which conductive rubber granules and insulating rubber granules are laid, is put into a drum vulcanizing machine for continuous vulcanization to form an antistatic floor mat.

[0031] Preferably, in step two, in order to avoid a large number of insulating rubber particles blocking conductivity between the conductive rubber particles and the conductive sheet during the paving process, the conductive sheet is vibrated by a vibration mechanism before proceeding to step three, thereby ensuring that the conductive rubber particles with larger particle sizes can come into contact with the conductive sheet.

[0032] Example 2:

[0033] The difference between Example 2 and Example 1 lies in the fact that, in order to ensure that the conductive rubber particles can have as much contact as possible with the conductive rubber layer during vulcanization, rather than being blocked by the insulating rubber particles, the material laying operation in step 2 can be optimized and improved to form a new production method:

[0034] Step 1: Prepare a conductive sheet as conductive rubber layer 1.

[0035] Step 2: First, spread the large-diameter conductive rubber granules on the conductive sheet at intervals. Then, spread the small-diameter insulating rubber granules on the conductive sheet, ensuring that the insulating rubber granules fill the gaps between the conductive rubber granules. By changing the spreading order, laying the conductive rubber granules first ensures that the bottom of the conductive rubber granules is in contact with the conductive sheet.

[0036] Step 3: The conductive sheet, on which conductive rubber granules and insulating rubber granules are laid, is put into a drum vulcanizing machine for continuous vulcanization to form an antistatic floor mat.

[0037] Example 3:

[0038] Compared to Example 2, Example 3 revealed two major problems during the experiment: ① During the subsequent laying of insulating rubber granules, it was possible that after filling the gaps between conductive rubber granules, the granules might spread onto the upper surface of the conductive rubber granules, forming an insulating layer after vulcanization, thus preventing the achievement of the antistatic function. ② Although the conductive rubber granules were laid in batches to ensure contact between their bottoms and the conductive sheet as much as possible, during the transport of the conductive sheet on the conveyor belt, small-diameter insulating rubber granules could easily be inserted between the conductive rubber granules and the conductive sheet due to vibration and other factors, preventing conductive connection after subsequent vulcanization and thus affecting the antistatic performance. Therefore, further improvements were made to form... Figure 2 The production method shown:

[0039] Step 1: Prepare a conductive sheet as conductive rubber layer 1.

[0040] Step 2: Apply conductive adhesive to the conductive sheet.

[0041] Step 3: Spread large-diameter conductive rubber particles on the conductive sheet at intervals. At this time, the conductive rubber particles are bonded to the conductive sheet by conductive adhesive; and the bonding between the conductive rubber particles and the conductive sheet can be ensured by the pressure roller.

[0042] Step 4: Spread small-diameter insulating rubber granules onto the conductive sheet, ensuring the granules fill the gaps between them. At this point, the lower layer of insulating rubber granules is also bonded to the conductive sheet using conductive adhesive.

[0043] Step 5: Use a brush to scrape off excess insulating rubber particles from the surface of the semi-finished product after spreading the insulating rubber particles in Step 4, so that they can be scraped off and prevented from accumulating on the conductive rubber particles.

[0044] Step Six: The conductive sheet, on which conductive rubber granules and insulating rubber granules are laid, is put into a drum vulcanizing machine for continuous vulcanization to form an antistatic floor mat.

[0045] In summary, the improved Example 3 ensures that the bottom of the conductive rubber particles in the antistatic floor mat formed after vulcanization is vulcanized together with the conductive sheet to ensure smooth conductivity. At the same time, it ensures that the top surface of the conductive rubber particles is exposed to the outside to avoid being covered by the insulating rubber particles during vulcanization, thereby ensuring its final conductivity performance.

[0046] See Figure 3Embodiment 3 of the present invention is based on an antistatic floor mat production equipment, comprising a material spreading mechanism located between an unwinding mechanism and a drum vulcanizing machine. A conveyor belt 101 constituting the material spreading mechanism is located between the discharge end of the unwinding mechanism and the feed end of the drum vulcanizing machine. A conductive particle feeding mechanism 103 and an insulating particle feeding mechanism 104 are installed above the conveyor belt 101. A glue-applying roller 102 is disposed between the conductive particle feeding mechanism 103 and the unwinding mechanism, and is located above the conveyor belt 101. A pressure roller 105 is disposed between the conductive particle feeding mechanism 103 and the insulating particle feeding mechanism 104, and is also located above the conveyor belt 101. A brush component 106 is disposed between the insulating particle feeding mechanism 104 and the drum vulcanizing machine, and is also located above the conveyor belt 101. Above the conveyor belt, the length of the brush 106 is greater than the width of the conveyor belt 101, and the brush 106 is perpendicular to or at an angle to the length direction of the conveyor belt 101 (to facilitate the sweeping of the insulating rubber particles to the edge for recycling). The distance H between the bottom brush of the brush 106 and the upper surface of the conveyor belt 101 is H=D+h, where D is the particle size of the conductive rubber particles and h is the thickness of the conductive sheet. Thus, the brush 106 can easily sweep away and remove the insulating rubber particles that fall on the surface of the conductive rubber particles, thereby avoiding the impact of these insulating rubber particles being pressed onto the conductive rubber particles after subsequent vulcanization, which would affect the antistatic performance. At the same time, the presence of the brush 106 can also make the insulating rubber particles more evenly distributed, avoiding the absence of insulating rubber particles between some conductive insulating particles.

[0047] Preferably, the conductive particle feeding mechanism 103 is a movable structure that moves back and forth via a screw and nut structure. The moving direction of the conductive particle feeding mechanism 103 is perpendicular to the moving direction of the conveyor belt 101, so that the conductive rubber particles falling in the conductive particle feeding mechanism 103 are spread evenly on the conductive sheet. At the same time, the insulating particle feeding mechanism 104 is a long strip structure that feeds simultaneously in the width direction of the conveyor belt 101, so that the insulating particles fall evenly on the conductive sheet and fill the spaces between the conductive rubber particles.

[0048] Additionally, it should be noted that the above-described specific implementation is merely an optimized solution of this patent, and any modifications or improvements made by those skilled in the art based on the above concept are within the scope of protection of this patent.

Claims

1. A method for producing antistatic floor mats, characterized in that: The method is based on an antistatic floor mat production equipment, comprising a conveyor belt (101) located between an unwinding mechanism and a drum vulcanizing machine, and a material feeding mechanism installed above the conveyor belt (101) along its moving direction. The material feeding mechanism comprises a conductive particle feeding mechanism (103) and an insulating particle feeding mechanism (104). A glue-applying roller (102) is provided between the conductive particle feeding mechanism (103) and the unwinding mechanism. A pressure roller (105) is provided between the insulating granule feeding mechanism (104) and the drum vulcanizing machine, and a brush (106) is provided between them. The coating roller (102), the pressure roller (105) and the brush (106) are all located above the conveyor belt (101). The length of the brush (106) is greater than the width of the conveyor belt (101), and the distance H between the bottom of the brush (106) and the upper surface of the conveyor belt (101) is less than or equal to D+h, where D is the particle size of the conductive rubber granules and h is the thickness of the conductive sheet. The steps of the method are as follows: Step 1: Prepare a conductive sheet as the conductive rubber layer; Step 2: Apply conductive adhesive to the conductive sheet; Step 3: Spread large-diameter conductive rubber particles on the conductive sheet at intervals. At this time, the conductive rubber particles are bonded to the conductive sheet by the conductive adhesive. Step 4: Spread small-diameter insulating rubber particles onto the conductive sheet, ensuring that the insulating rubber particles fill the gaps between the conductive rubber particles. Step 5: Use a brush to scrape the surface of the semi-finished product after the insulating rubber granules have been spread in Step 4, so that the excess insulating rubber granules can be scraped off or filled between the conductive rubber granules, and prevent them from accumulating on the conductive rubber granules. Step 6: The conductive sheet, on which conductive rubber granules and insulating rubber granules are laid, is put into the drum vulcanizing machine for continuous vulcanization to form an antistatic floor mat. The antistatic mat prepared by the above method includes a conductive rubber layer (1), an insulating rubber layer (2) is laminated on the conductive rubber layer (1), conductive rubber particles (3) are embedded in the insulating rubber layer (2), and the conductive rubber particles (3) penetrate the insulating rubber layer (2). The top surface of the conductive rubber particles (3) is flush with the insulating rubber layer (2), and the bottom surface of the conductive rubber particles (3) is bonded to the conductive rubber layer (1). The bottom of the conductive rubber particles (3) is vulcanized and bonded to the conductive rubber layer (1). The periphery of the conductive rubber particles (3) is vulcanized and bonded to the insulating rubber layer (2). The bottom surface of the insulating rubber layer (2) is vulcanized and bonded to the conductive rubber layer (1).

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