CN110564127B - Anti-static composite material, preparation method, anti-static shell and purifier - Google Patents
Anti-static composite material, preparation method, anti-static shell and purifier Download PDFInfo
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- CN110564127B CN110564127B CN201910794697.7A CN201910794697A CN110564127B CN 110564127 B CN110564127 B CN 110564127B CN 201910794697 A CN201910794697 A CN 201910794697A CN 110564127 B CN110564127 B CN 110564127B
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- 239000002131 composite material Substances 0.000 title claims abstract description 104
- 238000002360 preparation method Methods 0.000 title claims abstract description 13
- 239000011347 resin Substances 0.000 claims abstract description 97
- 229920005989 resin Polymers 0.000 claims abstract description 97
- 239000002216 antistatic agent Substances 0.000 claims abstract description 58
- 239000006087 Silane Coupling Agent Substances 0.000 claims abstract description 53
- 239000002904 solvent Substances 0.000 claims abstract description 45
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 60
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 60
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- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical group C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 claims description 18
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- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical group C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 9
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- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
- B32B27/302—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising aromatic vinyl (co)polymers, e.g. styrenic (co)polymers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
- B32B27/322—Layered products comprising a layer of synthetic resin comprising polyolefins comprising halogenated polyolefins, e.g. PTFE
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
- B32B27/365—Layered products comprising a layer of synthetic resin comprising polyesters comprising polycarbonates
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L55/00—Compositions of homopolymers or copolymers, obtained by polymerisation reactions only involving carbon-to-carbon unsaturated bonds, not provided for in groups C08L23/00 - C08L53/00
- C08L55/02—ABS [Acrylonitrile-Butadiene-Styrene] polymers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L69/00—Compositions of polycarbonates; Compositions of derivatives of polycarbonates
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/20—Properties of the layers or laminate having particular electrical or magnetic properties, e.g. piezoelectric
- B32B2307/21—Anti-static
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
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- C08K2201/001—Conductive additives
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
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- C08K2201/003—Additives being defined by their diameter
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/04—Antistatic
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/08—Polymer mixtures characterised by other features containing additives to improve the compatibility between two polymers
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Abstract
The invention provides an anti-static composite material, a preparation method thereof, an anti-static shell and a purifier. The antistatic composite material comprises resin, an antistatic agent, a silane coupling agent and a solubilizer, and the resistance of the antistatic composite material is 10 by limiting the contents of the resin, the antistatic agent, the silane coupling agent and the solubilizer6‑109The critical friction points between the raw materials are achieved at the same time, the antistatic effect is improved, and therefore the attenuation and dissipation of static electricity in the antistatic composite material are accelerated, and the static electricity on the inner surface of the shell of the purifier is not influencedWhen electricity, the static transmission process has been obstructed, lets the static influence of clarifier shell internal surface can not reach the clarifier shell surface, has solved shell surface collection ash and has influenced the problem of operating personnel safety, has improved the dust collection efficiency of clarifier simultaneously.
Description
Technical Field
The invention belongs to the technical field of electrostatic protection, and particularly relates to an anti-static composite material, a preparation method, an anti-static shell and a purifier.
Background
The air purifier is a product capable of adsorbing, decomposing or converting various air pollutants (generally including PM2.5, dust, pollen, peculiar smell, formaldehyde and other decoration pollutants, bacteria, allergens and the like), effectively improving air cleanliness, and is mainly classified into household, commercial, industrial, building and the like.
There are a number of different technologies and media in air purifiers that enable them to provide clean and safe air to users. Common air purification techniques are: adsorption technology, catalytic technology, photocatalyst technology, electrostatic dust collection technology, and the like; wherein adopt the electrostatic precipitation technique, the static of air purifier shell internal surface can influence inside electric field distribution, influence electricity congeal and with collection dirt efficiency, the inside electric field of air purifier shell can influence the static of shell internal surface, the shell surface is conducted to the static of shell internal surface simultaneously, can cause shell surface collection ash, and the static voltage of shell surface too high still can produce electrostatic discharge to operating personnel, influences life safety.
Disclosure of Invention
Therefore, the invention aims to solve the technical problems that the existing purifier shell has poor antistatic effect, the outer surface of the shell collects dust, the safety of operators is affected and the dust collection efficiency is low, so that the polylactic acid composite material and the preparation method and the application thereof are provided.
The antistatic composite material provided by the invention comprises resin, an antistatic agent, a silane coupling agent and a solubilizer, wherein the dosage of the antistatic agent is 5-10wt% of the dosage of the resin, the dosage of the silane coupling agent is 1-3wt% of the dosage of the antistatic agent, and the dosage of the solubilizer is 3-5wt% of the dosage of the resin.
Further, the antistatic coating comprises resin, an antistatic agent, a silane coupling agent and a solubilizer, wherein the dosage of the antistatic agent is 7-8wt% of the dosage of the resin, the dosage of the silane coupling agent is 1.5-2.5wt% of the dosage of the antistatic agent, and the dosage of the solubilizer is 3.5-4.5wt% of the dosage of the resin.
Further, the resin is an ABS resin;
the antistatic agent is conductive carbon black;
the silane coupling agent is a silane coupling agent KH550 and/or a silane coupling agent KH 560;
the solubilizer is polyether amine.
Further, the ABS resin is PC/ABS blending resin;
the particle size of the conductive carbon black is 12nm-30 nm;
the polyether amine is bisphenol A polyether amine, and the number average molecular weight of the bisphenol A polyether amine is 5000-.
In addition, the invention also provides a preparation method of the antistatic composite material, which comprises the following steps:
mixing an antistatic agent and a silane coupling agent for first grinding to obtain a first grinding material;
adding the solubilizer into the first grinding material, and performing second grinding to obtain a second grinding material;
and adding the second grinding material into the resin for blending, and performing injection molding and forming to obtain the anti-static composite material.
Further, the rotating speed of the first grinding is not less than 1000r/min, the time is not less than 2h, preferably, the rotating speed of the first grinding is 2000r/min-4000r/min, the time is 2h-5h, and the temperature is 20-30 ℃.
Further, the rotation speed of the second grinding is not less than 1000r/min, the time is not less than 1h, preferably, the rotation speed of the first grinding is 1500r/min-3500r/min, the time is 1h-4h, and the temperature is 20-30 ℃.
In addition, the invention also provides an anti-static shell which adopts the anti-static composite material.
Further, the anti-static shell sequentially comprises a polytetrafluoroethylene layer, an anti-static composite material layer and a resin layer from inside to outside;
preferably, the thickness of the polytetrafluoroethylene layer is 0.3mm-0.5mm, the antistatic composite layer is made of the antistatic composite material as claimed in any one of claims 1-4, the thickness of the antistatic composite layer is 2mm-5mm, the resin layer is PC/ABS blended resin, and the thickness of the PC/ABS blended resin is 2mm-5 mm;
preferably, the polytetrafluoroethylene layer has a resistivity of 1013-1016Omega cm, the resistance of the antistatic composite material layer is 106-109Ω。
In addition, the invention also provides a purifier which adopts the anti-static shell; preferably, the purifier is an air purifier.
The technical scheme of the invention has the following advantages:
1. the antistatic composite material provided by the invention comprises resin, an antistatic agent, a silane coupling agent and a solubilizer, and the resistance of the antistatic composite material is 10 by limiting the contents of the resin, the antistatic agent, the silane coupling agent and the solubilizer6-109Between omega, make simultaneously and reach critical running-in point between each raw materials, improved antistatic effect to accelerate static decay and loss wherein through this prevent static combined material, when not influencing clarifier shell internal surface static, the separation static transmission process, let the static influence of clarifier shell internal surface not reach clarifier shell surface, solved shell surface collection ash and influenced operating personnel safety's problem, improved the dust collection efficiency of clarifier simultaneously.
2. The antistatic composite material provided by the invention can further improve the antistatic performance of the antistatic composite material by selecting the type of resin, the type and particle size of the antistatic agent, the type of the silane coupling agent and the type and molecular weight of the solubilizer; specifically, the conductive carbon black has poor intermiscibility with resin and is easy to agglomerate, and the surface of the conductive carbon black is modified by using a silane coupling agent to increase the intermiscibility of the conductive carbon black and the resin; the compatibility of PC/ABS is poor, and the polyether amine is used as a solubilizer, so that the compatibility of PC/ABS is improved, and the problem of dispersion of conductive carbon black in the antistatic agent is solved.
3. The preparation method of the antistatic composite material provided by the invention comprises the steps of mixing the antistatic agent and the silane coupling agent for first grinding, modifying the antistatic agent by using the silane coupling agent, so that the antistatic agent is uniformly dispersed in the antistatic composite material, and simultaneously, the antistatic agent is endowed with the characteristics of stable resistance distribution and unchanged resistance after long-term use, so as to obtain a first grinding material; then, adding the solubilizer into the first abrasive, carrying out second grinding, and increasing the intermiscibility of the resin by using the solubilizer to obtain a second abrasive; and finally, adding the second grinding material into the resin for blending, and performing injection molding and forming to obtain the anti-static composite material.
4. The anti-static shell provided by the invention adopts the anti-static composite material, so that the anti-static effect of the anti-static shell is improved, the attenuation and dissipation of static electricity in the anti-static shell are accelerated through the anti-static composite material, the static electricity transmission process is blocked while the static electricity on the inner surface of the shell of the purifier is not influenced, the static electricity on the inner surface of the shell of the purifier cannot influence the outer surface of the shell of the purifier, the problems of dust collection on the outer surface of the shell and influence on the safety of operators are solved, and the dust collection efficiency of the purifier is improved.
5. According to the anti-static shell provided by the invention, the polytetrafluoroethylene layer is attached to the inner surface of the anti-static shell, the thickness is 0.3mm-0.5mm, the internal space of the air purifier is basically not influenced, and compared with a wrapped silicon rubber scheme, the space volume is improved by about 30%. Meanwhile, the polytetrafluoroethylene layer has extremely high insulating property and chemical inertia, high resistivity, excellent electric insulating effect and electric corrosion resistance effect, can effectively protect a corona area, and has no influence on electric field distribution and dust collection efficiency. The resistivity of the PTFE material in the polytetrafluoroethylene layer can reach 10 through testing13-1016Ω·cm，The problems that the resistance of the inner surface of the anti-static shell is too low, the low potential of the corona generation electrode contact part is caused, the distribution of an internal electric field is influenced, the electric coagulation and the dust collection efficiency are influenced, and the resistance is too high and easily generates static electricity, so that the static electricity is conducted to the outer surface of the anti-static shell, and the surface dust collection is caused are solved. The static voltage is too high, so that static discharge can be generated for operators, and the life safety is influenced;
when used as a protective material, the influence rate of corona current between the electrodes of the wire plate is lower than 2 percent. The PTFE material is detected by electrical aging, and the service life of the electrical aging is longer than 5 years. The PTFE material has the advantages of wear resistance, small surface friction coefficient and self-lubricating effect. And because the shell is an integral structure, the influence on the installation and the taking out of the dust collecting box is lowest, and the dust collecting box is not easy to damage. The PTFE material has extremely low surface energy, small contact angle with water, dust is not easy to adhere, the dust is easy to clean even if the dust is adhered by static electricity, and the PTFE material is low in damage in the cleaning process due to wear resistance of the material and has longer service life. Meanwhile, the anti-static effect can be achieved without using a PTFE material layer, but the anti-static composite material layer is easy to generate electrical aging due to the fact that the PTFE material layer is not protected. Meanwhile, the high surface resistance of the PTFE material can also play a role in homogenizing the internal electric field distribution. And a PTFE layer is not adopted, and the middle antistatic composite material layer easily influences an internal electric field, so that the purification capacity of the air purifier is influenced.
6. According to the anti-static shell provided by the invention, the anti-static composite material layer is selected as the middle layer of the anti-static shell, the thickness of the anti-static composite material layer is 2-5 mm, and the resistance of the anti-static composite material layer is 106-109Omega, static electricity conducted by the polytetrafluoroethylene layer can be conducted away quickly, and the static electricity charging condition of the outer surface of the anti-static shell is not influenced; the outer layer of the antistatic shell is selected from a resin layer, preferably a common PC/ABS layer, the thickness of the resin layer is 2mm-5mm, the resin layer can be integrally formed or externally added and installed, the color can be adjusted, and various film materials and the like can be added. In the present invention, ordinary PC/ABS is a thermoplastic plastic prepared by blending Polycarbonate (Polycarbonate) and acrylonitrile-butadiene-styrene copolymer (ABS). With the use of the machine, i.e. both inside and outside watchesThe surface is easy to generate internal stress, and through the matching of the polytetrafluoroethylene layer, the anti-static composite material layer and the resin layer, the expansion coefficients between adjacent layers are matched, and the problems of shell deformation and the like caused by the internal stress can be avoided.
7. The purifier provided by the invention adopts the anti-static shell; preferably, the clarifier is air purifier, through adopting above-mentioned antistatic shell can make inside and outside static not influence each other, also solves the interior space capacity simultaneously, does not influence space electric field distribution, easily installation and washing etc..
Drawings
The features and advantages of the present invention will be more clearly understood by reference to the accompanying drawings, which are illustrative and not to be construed as limiting the invention in any way, and in which:
FIG. 1 is a schematic structural diagram of an anti-static housing according to an embodiment of the invention;
FIG. 2 is a flow chart illustrating a method for preparing an antistatic composite material according to an embodiment of the present invention;
the reference numerals are explained below:
1-a polytetrafluoroethylene layer; 2-antistatic composite material layer; and 3-resin layer.
Detailed Description
The following examples are provided to further understand the present invention, not to limit the scope of the present invention, but to provide the best mode, not to limit the content and the protection scope of the present invention, and any product similar or similar to the present invention, which is obtained by combining the present invention with other prior art features, falls within the protection scope of the present invention.
The examples do not show the specific experimental steps or conditions, and can be performed according to the conventional experimental steps described in the literature in the field. The reagents or instruments used are not indicated by manufacturers, and are all conventional reagent products which can be obtained commercially. All the raw materials completely meet the requirements of food grade.
On one hand, in order to solve the defects of poor antistatic effect of the shell of the existing purifier, dust collection on the outer surface of the shell, influence on the safety of operators and low dust collection efficiency, the antistatic composite material provided by the invention comprises resin, an antistatic agent, a silane coupling agent and a solubilizer, wherein the dosage of the antistatic agent is 5-10wt% of that of the resin, the dosage of the silane coupling agent is 1-3wt% of that of the antistatic agent, and the dosage of the solubilizer is 3-5wt% of that of the resin. Preferably, the antistatic coating comprises a resin, an antistatic agent, a silane coupling agent and a solubilizer, wherein the antistatic agent is 7-8wt% of the resin, the silane coupling agent is 1.5-2.5wt% of the antistatic agent, and the solubilizer is 3.5-4.5wt% of the resin.
As an alternative embodiment, the resin is an ABS resin; the antistatic agent is conductive carbon black; the silane coupling agent is a silane coupling agent KH550 and/or a silane coupling agent KH 560; the solubilizer is polyether amine. Preferably, the ABS resin is PC/ABS blend resin; the particle size of the conductive carbon black is 12nm-30 nm; the polyether amine is bisphenol A polyether amine, and the number average molecular weight of the bisphenol A polyether amine is 5000-.
The antistatic composite material provided by the invention comprises resin, an antistatic agent, a silane coupling agent and a solubilizer, and the resistance of the antistatic composite material is 10 by limiting the contents of the resin, the antistatic agent, the silane coupling agent and the solubilizer6-109Between omega, make simultaneously and reach critical running-in point between each raw materials, improved antistatic effect to accelerate static decay and loss wherein through this prevent static combined material, when not influencing clarifier shell internal surface static, the separation static transmission process, let the static influence of clarifier shell internal surface not reach clarifier shell surface, solved shell surface collection ash and influenced operating personnel safety's problem, improved the dust collection efficiency of clarifier simultaneously. Furthermore, the antistatic performance of the antistatic composite material can be improved by selecting the type of resin, the type and the particle size of the antistatic agent, the type of the silane coupling agent, the type and the molecular weight of the solubilizer; specifically, the conductive carbon black has poor compatibility with resin, is easy to agglomerate, and is conductive by a silane coupling agentThe surface of the electric carbon black is modified, so that the intermiscibility of the electric carbon black and resin is improved; the compatibility of PC/ABS is poor, and the polyether amine is used as a solubilizer, so that the compatibility of PC/ABS is improved, and the problem of dispersion of conductive carbon black in the antistatic agent is solved.
On the other hand, the invention also provides a preparation method of the antistatic composite material, which comprises the following steps: mixing an antistatic agent and a silane coupling agent for first grinding to obtain a first grinding material; adding the solubilizer into the first grinding material, and performing second grinding to obtain a second grinding material; and adding the second grinding material into the resin for blending, and performing injection molding and forming to obtain the anti-static composite material. Further, the rotating speed of the first grinding is not less than 1000r/min, the time is not less than 2h, preferably, the rotating speed of the first grinding is 2000r/min-4000r/min, the time is 2h-5h, and the temperature is 20-30 ℃. Further, the rotation speed of the second grinding is not less than 1000r/min, the time is not less than 1h, preferably, the rotation speed of the first grinding is 1500r/min-3500r/min, the time is 1h-4h, and the temperature is 20-30 ℃.
The preparation method of the antistatic composite material provided by the invention comprises the steps of mixing the antistatic agent and the silane coupling agent for first grinding, modifying the antistatic agent by using the silane coupling agent, so that the antistatic agent is uniformly dispersed in the antistatic composite material, and simultaneously, the antistatic agent is endowed with the characteristics of stable resistance distribution and unchanged resistance after long-term use, so as to obtain a first grinding material; then, adding the solubilizer into the first abrasive, carrying out second grinding, and increasing the intermiscibility of the resin by using the solubilizer to obtain a second abrasive; and finally, adding the second grinding material into the resin for blending, and performing injection molding and forming to obtain the anti-static composite material.
On the other hand, the invention also provides an anti-static shell which is made of the anti-static composite material. Further, the anti-static shell sequentially comprises a polytetrafluoroethylene layer, an anti-static composite material layer and a resin layer from inside to outside; preferably, the thickness of the polytetrafluoroethylene layer is 0.3mm-0.5mm, and the antistatic composite layer is formed by the antistatic composite material layer as claimed in any one of claims 1-4The antistatic composite material layer is 2-5 mm thick, the resin layer is PC/ABS blended resin, and the PC/ABS blended resin is 2-5 mm thick; preferably, the polytetrafluoroethylene layer has a resistivity of 1013-1016Omega cm, the resistance of the antistatic composite material layer is 106-109Ω。
The anti-static shell provided by the invention adopts the anti-static composite material, so that the anti-static effect of the anti-static shell is improved, the attenuation and dissipation of static electricity in the anti-static shell are accelerated through the anti-static composite material, the static electricity transmission process is blocked while the static electricity on the inner surface of the shell of the purifier is not influenced, the static electricity on the inner surface of the shell of the purifier cannot influence the outer surface of the shell of the purifier, the problems of dust collection on the outer surface of the shell and influence on the safety of operators are solved, and the dust collection efficiency of the purifier is improved.
The polytetrafluoroethylene layer is attached to the inner surface of the anti-static shell, the thickness is 0.3mm-0.5mm, the inner space of the air purifier is basically not affected, and compared with a wrapped silicon rubber scheme, the space volume is improved by about 30%. Meanwhile, the polytetrafluoroethylene layer has extremely high insulating property and chemical inertia, high resistivity, excellent electric insulating effect and electric corrosion resistance effect, can effectively protect a corona area, and has no influence on electric field distribution and dust collection efficiency. The resistivity of the PTFE material in the polytetrafluoroethylene layer can reach 10 through testing13-1016Omega cm, the phenomenon that the low resistance of the inner surface of the anti-static shell can cause the low potential of the contact part of the corona generating electrode to influence the distribution of the internal electric field and the electric coagulation and dust collection efficiency is avoided, and the high resistance can easily generate static electricity which is conducted to the outer surface of the anti-static shell to cause the surface dust collection. The static voltage is too high, so that static discharge can be generated for operators, and the life safety is influenced; when used as a protective material, the influence rate of corona current between the electrodes of the wire plate is lower than 2 percent. The PTFE material is detected by electrical aging, and the service life of the electrical aging is longer than 5 years. The PTFE material has the advantages of wear resistance, small surface friction coefficient and self-lubricating effect. And because the shell is an integral structure, the influence on the installation and the taking out of the dust collecting box is lowest, and the dust collecting box is not easy to damage. PTFE materialThe PTFE material has extremely low surface energy, small contact angle with water, difficult dust adhesion, easy cleaning even if the dust is adhered by static electricity, low damage to the PTFE material in the cleaning process due to wear resistance of the material, and longer service life. Meanwhile, the anti-static effect can be achieved without using a PTFE material layer, but the anti-static composite material layer is easy to generate electrical aging due to the fact that the PTFE material layer is not protected. Meanwhile, the high surface resistance of the PTFE material can also play a role in homogenizing the internal electric field distribution. And a PTFE layer is not adopted, and the middle antistatic composite material layer easily influences an internal electric field, so that the purification capacity of the air purifier is influenced.
According to the anti-static shell provided by the invention, the anti-static composite material layer is selected as the middle layer of the anti-static shell, the thickness of the anti-static composite material layer is 2-5 mm, and the resistance of the anti-static composite material layer is 106-109Omega, static electricity conducted by the polytetrafluoroethylene layer can be conducted away quickly, and the static electricity charging condition of the outer surface of the anti-static shell is not influenced; the outer layer of the antistatic shell is selected from a resin layer, preferably a common PC/ABS layer, the thickness of the resin layer is 2mm-5mm, the resin layer can be integrally formed or externally added and installed, the color can be adjusted, and various film materials and the like can be added. In the present invention, ordinary PC/ABS is a thermoplastic plastic prepared by blending Polycarbonate (Polycarbonate) and acrylonitrile-butadiene-styrene copolymer (ABS). With the use of the machine, even if internal stress is easily generated on the inner surface and the outer surface, through the matching of the polytetrafluoroethylene layer, the antistatic composite material layer and the resin layer, the expansion coefficients between adjacent layers are matched, and the problems of shell deformation and the like caused by the internal stress can be avoided.
On the other hand, the invention also provides a purifier which adopts the anti-static shell; preferably, the purifier is an air purifier.
The purifier provided by the invention adopts the anti-static shell; preferably, the clarifier is air purifier, through adopting above-mentioned antistatic shell can make inside and outside static not influence each other, also solves the interior space capacity simultaneously, does not influence space electric field distribution, easily installation and washing etc..
In order to explain the technical scheme of the invention in detail, the following specific embodiments are provided:
example 1
The embodiment provides an anti-static shell, as shown in fig. 1, which sequentially comprises a polytetrafluoroethylene layer 1, an anti-static composite material layer 2 and a resin layer 3 from inside to outside; wherein the thickness of the polytetrafluoroethylene layer 1 is 0.4mm, and the resistivity of the polytetrafluoroethylene layer is 1015Omega cm; the thickness of the antistatic composite layer 2 was 4mm, and the resistance of the antistatic composite layer 2 was 107Omega; the resin layer is PC/ABS blending resin, and the thickness of the PC/ABS blending resin is 3 mm;
in the anti-static shell, firstly, one surface of a polytetrafluoroethylene layer 1 is activated by acidification, and an active surface is formed on the polytetrafluoroethylene layer 1; then, the polytetrafluoroethylene layer 1 and the antistatic composite material layer 2 are compounded together in an adhesive mode, so that the active surface of the polytetrafluoroethylene layer 1 is tightly attached to the inner surface of the antistatic composite material layer 2; finally, the resin layer 3 and the antistatic composite material layer 2 are connected by gluing;
the antistatic composite material layer 2 is made of an antistatic composite material, the antistatic composite material is composed of resin, an antistatic agent, a silane coupling agent and a solubilizer, the using amount of the antistatic agent is 8wt% of that of the resin, the using amount of the silane coupling agent is 2 wt% of that of the antistatic agent, and the using amount of the solubilizer is 4 wt% of that of the resin; wherein the resin is PC/ABS blending resin, the antistatic agent is conductive carbon black with the particle size of 21nm, the silane coupling agent is a silane coupling agent KH550, and the solubilizer is bisphenol A polyether amine with the number average molecular weight of 12000;
as shown in fig. 2, the preparation method of the antistatic composite material comprises the following steps: (1) mixing an antistatic agent and a silane coupling agent, and carrying out ball milling at the rotating speed of 3000r/min for 3h at the temperature of 25 ℃ to obtain a first grinding material; (2) adding the solubilizer into the first grinding material, and carrying out ball milling at the rotating speed of 2500r/min for 2.5h at the temperature of 25 ℃ to obtain a second grinding material; (3) and adding the second grinding material into the resin for blending, and performing injection molding and forming to obtain the anti-static composite material.
Example 2
The embodiment provides an anti-static shell, as shown in fig. 1, which sequentially comprises a polytetrafluoroethylene layer 1, an anti-static composite material layer 2 and a resin layer 3 from inside to outside; wherein the thickness of the polytetrafluoroethylene layer 1 is 0.3mm, and the resistivity of the polytetrafluoroethylene layer is 1013Omega cm; the thickness of the antistatic composite layer 2 was 5mm, and the resistance of the antistatic composite layer 2 was 109Omega; the resin layer is PC/ABS blending resin, and the thickness of the PC/ABS blending resin is 2 mm;
in the anti-static shell, firstly, one surface of a polytetrafluoroethylene layer 1 is activated by plasma font, and an active surface is formed on the polytetrafluoroethylene layer 1; then, the polytetrafluoroethylene layer 1 and the antistatic composite material layer 2 are compounded together in an integrated molding mode, so that the active surface of the polytetrafluoroethylene layer 1 is tightly attached to the inner surface of the antistatic composite material layer 2; finally, the resin layer 3 is connected with the antistatic composite material layer 2 by a buckle;
the antistatic composite material layer 2 is made of an antistatic composite material, the antistatic composite material is composed of resin, an antistatic agent, a silane coupling agent and a solubilizer, the using amount of the antistatic agent is 10wt% of that of the resin, the using amount of the silane coupling agent is 3wt% of that of the antistatic agent, and the using amount of the solubilizer is 5wt% of that of the resin; wherein the resin is PC/ABS blending resin, the antistatic agent is conductive carbon black with the particle size of 12nm, the silane coupling agent is a silane coupling agent KH560, and the solubilizer is bisphenol A polyether amine with the number average molecular weight of 20000;
as shown in fig. 2, the preparation method of the antistatic composite material comprises the following steps: (1) mixing an antistatic agent and a silane coupling agent, and carrying out ball milling at the rotating speed of 2000r/min for 5h at the temperature of 20 ℃ to obtain a first grinding material; (2) adding the solubilizer into the first grinding material, and carrying out ball milling at a rotation speed of 3500r/min for 1h at a temperature of 30 ℃ to obtain a second grinding material; (3) and adding the second grinding material into the resin for blending, and performing injection molding and forming to obtain the anti-static composite material.
Example 3
The embodiment provides an anti-static shell, as shown in fig. 1, which sequentially comprises a polytetrafluoroethylene layer 1, an anti-static composite material layer 2 and a resin layer 3 from inside to outside; wherein the thickness of the polytetrafluoroethylene layer 1 is 0.5mm, and the resistivity of the polytetrafluoroethylene layer is 1016Omega cm; the thickness of the antistatic composite layer 2 was 2mm, and the resistance of the antistatic composite layer 2 was 106Omega; the resin layer is PC/ABS blending resin, and the thickness of the PC/ABS blending resin is 5 mm;
in the anti-static shell, firstly, one surface of a polytetrafluoroethylene layer 1 is activated by acidification, and an active surface is formed on the polytetrafluoroethylene layer 1; then, the polytetrafluoroethylene layer 1 and the antistatic composite material layer 2 are compounded together in an adhesive mode, so that the active surface of the polytetrafluoroethylene layer 1 is tightly attached to the inner surface of the antistatic composite material layer 2; finally, the resin layer 3 and the antistatic composite material layer 2 are connected by gluing;
the antistatic composite material layer 2 is made of an antistatic composite material, the antistatic composite material is composed of resin, an antistatic agent, a silane coupling agent and a solubilizer, the using amount of the antistatic agent is 5wt% of that of the resin, the using amount of the silane coupling agent is 1 wt% of that of the antistatic agent, and the using amount of the solubilizer is 3wt% of that of the resin; wherein the resin is PC/ABS blending resin, the antistatic agent is conductive carbon black with the particle size of 30nm, the silane coupling agent is a silane coupling agent KH550, and the solubilizer is bisphenol A polyether amine with the number average molecular weight of 5000;
as shown in fig. 2, the preparation method of the antistatic composite material comprises the following steps: (1) mixing an antistatic agent and a silane coupling agent, and carrying out ball milling at the rotation speed of 4000r/min for 2h at the temperature of 30 ℃ to obtain a first grinding material; (2) adding the solubilizer into the first grinding material, and carrying out ball milling at the rotation speed of 1500r/min for 4h at the temperature of 20 ℃ to obtain a second grinding material; (3) and adding the second grinding material into the resin for blending, and performing injection molding and forming to obtain the anti-static composite material.
Comparative example 1
This comparative example provides an antistatic shell, similar to example 1, except that: no silane coupling agent was added in this comparative example.
Comparative example 2
This comparative example provides an antistatic shell, similar to example 1, except that: no solubilizer was added in this comparative example.
Comparative example 3
This comparative example provides an antistatic shell, similar to example 1, except that: no antistatic agent was added in this comparative example.
Examples of the experiments
Air cleaners were made using the antistatic casings of examples 1-3 and comparative examples 1-3, respectively, according to the same process and structure, and were respectively designated as air cleaners a-F, the only difference between air cleaners a-F being: the antistatic shell is made of different materials; place air purifier in the room of area for the same air state of 25 square meters respectively, operate 1 day, observe whether the surface of antistatic shell has the collection dirt phenomenon among the air purifier, survey air purifier's average collection dirt efficiency simultaneously, corresponding test result sees table 1:
TABLE 1
| Air purifier | Whether or not there is a dust collecting phenomenon | Average dust collecting efficiency |
| A | Whether or not | ≥95％ |
| B | Whether or not | ≥90％ |
| C | Whether or not | ≥90％ |
| D | Is that | ≤82％ |
| E | Is that | ≤80％ |
| F | Is that | ≤76％ |
From table 1, it can be seen that: the anti-static shell adopts the anti-static composite material, so that the anti-static effect of the anti-static shell is improved, the attenuation and dissipation of static electricity in the anti-static shell are accelerated through the anti-static composite material, the static electricity transmission process is blocked while the static electricity on the inner surface of the shell of the purifier is not influenced, the static electricity on the inner surface of the shell of the purifier cannot influence the outer surface of the shell of the purifier, the problems that the ash on the outer surface of the shell is collected and the safety of operators is influenced are solved, and the dust collection efficiency of the purifier is improved.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (12)
1. An antistatic composite material comprises resin, an antistatic agent, a silane coupling agent and a solubilizer, wherein the dosage of the antistatic agent is 5-10wt% of the dosage of the resin, the dosage of the silane coupling agent is 1-3wt% of the dosage of the antistatic agent, the dosage of the solubilizer is 3-5wt% of the dosage of the resin, the resin is PC/ABS blending resin, the antistatic agent is conductive carbon black, and the solubilizer is polyether amine.
2. The antistatic composite material as claimed in claim 1, comprising a resin, an antistatic agent, a silane coupling agent and a solubilizing agent, wherein the amount of the antistatic agent is 7-8wt% of the amount of the resin, the amount of the silane coupling agent is 1.5-2.5wt% of the amount of the antistatic agent, and the amount of the solubilizing agent is 3.5-4.5wt% of the amount of the resin.
3. The antistatic composite material according to claim 1 or 2,
the silane coupling agent is a silane coupling agent KH550 and/or a silane coupling agent KH 560.
4. The antistatic composite material as claimed in claim 3, wherein the conductive carbon black has a particle size of 12nm to 30 nm;
the polyether amine is bisphenol A polyether amine, and the number average molecular weight of the bisphenol A polyether amine is 5000-.
5. A method of making the antistatic composite material of any one of claims 1-4, comprising the steps of:
mixing an antistatic agent and a silane coupling agent for first grinding to obtain a first grinding material;
adding the solubilizer into the first grinding material, and performing second grinding to obtain a second grinding material;
and adding the second grinding material into the resin for blending, and performing injection molding and forming to obtain the anti-static composite material.
6. The preparation method according to claim 5, wherein the rotation speed of the first grinding is not less than 1000r/min, the time is not less than 2h, and the temperature is 20-30 ℃.
7. The method according to claim 6, wherein the first grinding is performed at a rotation speed of 2000r/min to 4000r/min for a time of 2h to 5 h.
8. The method according to any one of claims 5 to 7, wherein the second grinding is performed at a rotation speed of not less than 1000r/min for a time of not less than 1h at a temperature of 20 to 30 ℃.
9. The method of claim 8, wherein the second grinding is performed at a speed of 1500r/min to 3500r/min for a period of 1h to 4 h.
10. An antistatic shell, characterized in that the antistatic composite material as claimed in any one of claims 1 to 4 is used.
11. The antistatic shell according to claim 10, comprising a polytetrafluoroethylene layer, an antistatic composite layer and a resin layer in sequence from inside to outside;
the thickness of the polytetrafluoroethylene layer is 0.3mm-0.5mm, the antistatic composite material layer is made of the antistatic composite material according to any one of claims 1-4, the thickness of the antistatic composite material layer is 2mm-5mm, the resin layer is PC/ABS blended resin, and the thickness of the PC/ABS blended resin is 2mm-5 mm;
the polytetrafluoroethylene layer has a resistivity of 1013-1016Omega cm, the resistance of the antistatic composite material layer is 106-109Ω。
12. A purifier characterized by using the antistatic housing as claimed in claim 10 or 11.
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