Anti-static trench cover plate

Abstract

The application provides an anti-static trench cover plate, relates to the technical field of cover plates, and the preparation raw materials of the anti-static trench cover plate are composed of the following components in percentage by weight: polyurea grease 25-30%, filler 28-36%, conductive filler 0.5-2%, curing agent 6-20%, polyether ether ketone 16-24%, fiber mesh cloth 2-5%, plasticizer 0.3-1%, and other additives 0.5-3%. According to the application, the polyether ether ketone is mixed with the plasticizer, hot-melt extruded, and then pressed into a shape to obtain a cover plate inner core; the polyurea grease, the filler, the conductive filler and the other additives are mixed with the curing agent to obtain an injection molding liquid, and the injection molding liquid is formed on the surface of the cover plate inner core; the cover plate inner core made of the polyether ether ketone has high strength and can prevent the finished cover plate from being easily deformed; and the addition of the conductive filler can adjust the resistance of the outer layer of the finished cover plate, so that the resistance of the finished cover plate can be between the anti-static standards, thereby making the finished cover plate achieve better use effect.

Description

Technical Field

[0001] This invention relates to the field of cover technology, and more particularly to an antistatic trench cover. Background Technology

[0002] In aerospace processes, the presence of static electricity can affect the normal and stable operation of equipment. However, most existing trench covers are made of SMC composite material, which, although an insulating material, does not meet the anti-static standards. As a result, the trench covers still carry some static electricity during use, making it difficult to achieve good performance. Improvements are needed. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings of existing technologies by proposing an antistatic trench cover.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: an antistatic trench cover, wherein the raw materials for preparing the antistatic trench cover are composed of the following components by weight percentage: 25-30% polyurea, 28-36% filler, 0.5-2% conductive filler, 6-20% curing agent, 16-24% polyetheretherketone, 2-5% fiber mesh, 0.3-1% plasticizer, and 0.5-3% other additives.

[0005] In order to make the fiber mesh fabric have sufficient strength, the present invention includes improvements such as the fiber mesh fabric being made of materials including but not limited to nylon and ceramic fibers.

[0006] In order to enable the normal preparation of injection molding liquid, the present invention has the following improvement: the filler is one or more of carbon black, talc powder, and mica powder in any proportion.

[0007] To achieve the effect of adjusting the resistance value, the present invention is improved in that the conductive filler is one or more of metal powder, graphene, and silicon dioxide powder in any proportion.

[0008] In order to ensure that the outer layer of the finished cover plate can be cured normally, the improvement of the present invention is that the curing agent is an aliphatic polyisocyanate.

[0009] To ensure the reaction proceeds normally, the present invention includes improvements such as the inclusion of other additives including, but not limited to, defoamers, coupling agents, and dispersants.

[0010] The processing method of the antistatic trench cover includes the following steps:

[0011] S1: Pour polyetheretherketone and plasticizer into a mixer and mix them. The mixing speed is 120-180 revolutions per minute and the mixing time is 30-40 minutes to obtain the mixture.

[0012] S2: Pour the mixture into the extruder and hot melt extrude the mixture at a temperature of 320-400℃. Then, press it into shape using a molding machine to obtain the inner core of the cover plate for later use.

[0013] S3: Pour polyurea, filler, conductive filler and other additives into the reactor, heat and stir, the stirring speed is 160-240 rpm, the stirring time is 40-50 minutes, and the heating temperature is 160-180℃;

[0014] S4: Pour the curing agent into the reactor, maintain the temperature and stir, the stirring speed is 120-150 revolutions per minute, the stirring time is 20-30 minutes, and the injection molding liquid is obtained;

[0015] S5: Cover the inner core of the cover plate with a fiber mesh, then place the inner core covered with the fiber mesh into the center of the molding mold, and then inject the injection liquid into the molding mold to cool and solidify the injection liquid in the molding mold to obtain the finished cover plate. The inner core of the cover plate must be located in the center of the finished cover plate.

[0016] S6: Inspect the finished cover plate. After passing the inspection, package it in a sealed bag and put it into storage.

[0017] To ensure that the finished cover plate meets the usage requirements, the present invention is improved in that, when the resistance value of the finished cover plate is tested in step S6, the resistance value of the finished cover plate must be between 100 megohms and 600 megohms.

[0018] Compared with the prior art, the advantages and positive effects of the present invention are as follows:

[0019] In this invention, a cover core is obtained by mixing polyetheretherketone (PEEK) with a plasticizer, hot-melt extrusion, and then pressing. Polyurea, fillers, conductive fillers, and other additives are mixed and reacted with a curing agent to obtain an injection molding liquid, which is then molded on the surface of the cover core. The PEEK cover core has high strength, which can prevent the finished cover from easily deforming. The addition of conductive fillers can adjust the resistance of the outer layer of the finished cover so that the resistance of the finished cover is within the anti-static standard range, thereby enabling the finished cover to achieve better performance. Attached Figure Description

[0020] Figure 1 The present invention provides a flowchart of an anti-static trench cover. Detailed Implementation

[0021] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described below in conjunction with the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0022] In the description of this invention, it should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention 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, and therefore should not be construed as a limitation of the invention. Furthermore, in the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0023] Example

[0024] like Figure 1 As shown, the present invention provides a technical solution: an antistatic trench cover, wherein the raw materials for preparing the antistatic trench cover are composed of the following components by weight percentage: 25-30% polyurea, 28-36% filler, 0.5-2% conductive filler, 6-20% curing agent, 16-24% polyetheretherketone, 2-5% fiber mesh, 0.3-1% plasticizer, and 0.5-3% other additives. The fiber mesh material includes, but is not limited to, nylon and ceramic fiber. The fiber mesh can improve the strength of the outer layer of the finished cover and prevent the outer layer of the finished cover from easily breaking. The filler is one or more of carbon black, talc powder, and mica powder in any proportion. The conductive filler is one or more of metal powder, graphene, and silica powder in any proportion, so that the resistance of the finished cover can be adjusted by the conductive filler. The curing agent is aliphatic polyisocyanate, so that the outer layer of the finished cover can be cured normally. Other additives include, but are not limited to, defoamers, coupling agents, and dispersants, so that the reaction can proceed normally.

[0025] like Figure 1 As shown, the processing method of the antistatic trench cover includes the following steps:

[0026] S1: Pour polyetheretherketone and plasticizer into a mixer and mix them. The mixing speed is 120-180 revolutions per minute and the mixing time is 30-40 minutes to obtain the mixture.

[0027] S2: Pour the mixture into the extruder and hot melt extrude the mixture at a temperature of 320-400℃. Then, press it into shape using a molding machine to obtain the inner core of the cover plate for later use.

[0028] S3: Pour polyurea, filler, conductive filler and other additives into the reactor, heat and stir, the stirring speed is 160-240 rpm, the stirring time is 40-50 minutes, and the heating temperature is 160-180℃;

[0029] S4: Pour the curing agent into the reactor, maintain the temperature and stir, the stirring speed is 120-150 revolutions per minute, the stirring time is 20-30 minutes, and the injection molding liquid is obtained;

[0030] S5: Cover the inner core of the cover plate with a fiber mesh, then place the inner core covered with the fiber mesh into the center of the molding mold, and then inject the injection liquid into the molding mold to cool and solidify the injection liquid in the molding mold to obtain the finished cover plate. The inner core of the cover plate must be located in the center of the finished cover plate.

[0031] S6: Inspect the finished cover plate. After passing the inspection, package it in a sealed bag and put it into storage.

[0032] When performing resistance testing on the finished cover plate in S6, the resistance of the finished cover plate must be between 100 megohms and 600 megohms, so that the finished cover plate can be shipped out while meeting the anti-static requirements.

[0033] Working principle: By mixing polyetheretherketone (PEEK) with a plasticizer, hot-melt extrusion, and then pressing, the inner core of the cover plate is obtained. Polyurea, fillers, conductive fillers, and other additives are mixed with a curing agent to produce an injection molding liquid, which is then molded on the surface of the inner core of the cover plate. The PEEK inner core of the cover plate has high strength, which can prevent the finished cover plate from easily deforming. The addition of conductive fillers can adjust the resistance of the outer layer of the finished cover plate so that the resistance of the finished cover plate is within the anti-static standard range, thereby enabling the finished cover plate to achieve better performance.

[0034] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments that can be applied to other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A method for processing an antistatic trench cover, characterized in that, The raw materials for preparing the antistatic trench cover consist of the following components by weight percentage: 25-30% polyurea, 28-36% filler, 0.5-2% conductive filler, 6-20% curing agent, 16-24% polyether ether ketone, 2-5% fiber mesh, 0.3-1% plasticizer, and 0.5-3% other additives. The filler is one or more of carbon black, talc powder, and mica powder in any proportion; The conductive filler is one or more of metal powder and graphene in any proportion; The processing method includes the following steps: S1: Pour polyetheretherketone and plasticizer into a mixer and mix them. The mixing speed is 120-180 revolutions per minute and the mixing time is 30-40 minutes to obtain the mixture. S2: Pour the mixture into the extruder and hot melt extrude the mixture at a temperature of 320-400℃. Then, press it into shape using a molding machine to obtain the inner core of the cover plate for later use. S3: Pour polyurea, filler, conductive filler and other additives into the reactor, heat and stir, the stirring speed is 160-240 rpm, the stirring time is 40-50 minutes, and the heating temperature is 160-180℃; S4: Pour the curing agent into the reactor, maintain the temperature and stir, the stirring speed is 120-150 revolutions per minute, the stirring time is 20-30 minutes, and the injection molding liquid is obtained; S5: Cover the inner core of the cover plate with a fiber mesh, then place the inner core covered with the fiber mesh into the center of the molding mold, and then inject the injection liquid into the molding mold to cool and solidify the injection liquid in the molding mold to obtain the finished cover plate. The inner core of the cover plate must be located in the center of the finished cover plate. S6: Inspect the finished cover plate. After passing the inspection, pack it in a sealed bag and put it into storage. When performing resistance testing on the finished cover plate in S6, the resistance of the finished cover plate is between 100 megohms and 600 megohms.

2. The processing method of the antistatic trench cover according to claim 1, characterized in that: The materials of the fiber mesh include nylon and ceramic fibers.

3. The processing method of the antistatic trench cover according to claim 1, characterized in that: The curing agent is an aliphatic polyisocyanate.

4. The processing method of the antistatic trench cover according to claim 1, characterized in that: The other additives include defoamers, coupling agents, and dispersants.

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