WO2012116495A1

WO2012116495A1 - Antistatic composite, electronic equipment shell and electronic equipment

Info

Publication number: WO2012116495A1
Application number: PCT/CN2011/071478
Authority: WO
Inventors: 何永红; 朱泉和
Original assignee: 海能达通信股份有限公司
Priority date: 2011-03-03
Filing date: 2011-03-03
Publication date: 2012-09-07

Abstract

An antistatic composite includes: an antistatic layer (11), wherein the antistatic layer (11) is formed by curing a first resin composite which is filled with electric conductive filler; and an insulation support layer (12) connected with the antistatic layer (11), wherein the insulation support layer (12) is formed by curing a second resin composite. Compared with the prior art, the antistatic layer (11) can make the composite achieve good antistatic effect, while the insulation support layer (12) can make the composite have good mechanical property, i.e. the composite provided in this invention has good antistatic property while ensuring its good mechanical property.

Description

Anti-static composite material, electronic device housing and electronic device

The present invention relates to the field of composite materials, and in particular to an antistatic composite material, a workpiece made of the antistatic composite material, an electronic device housing, and an electronic device. Background technique

Explosion-proof walkie-talkie refers to a walkie-talkie that can work in an explosive atmosphere. Many components of explosion-proof walkie-talkies require special design to prevent hazards when used in an explosive atmosphere, as compared to conventional walkie-talkies. For example, the surface of the walkie-talkie machine usually needs to be anti-static. The surface resistance of the explosion-proof walkie-talkie should be less than that specified in IEC60079-0 2007.

In the prior art, the anti-static treatment of the machine surface of the explosion-proof walkie-talkie generally has the following three methods, namely: using a metal casing as the casing of the walkie-talkie; using a common plastic casing, but spraying an anti-static layer on the surface of the plastic casing Coating; Alternatively, an antistatic plastic is made using a resin composition filled with a conductive filler to achieve an antistatic effect on the surface of the machine. However, the above three methods used in the prior art have disadvantages that are difficult to overcome by themselves.

At present, the metal casing of the explosion-proof walkie-talkie is generally made of stainless steel or aluminum/magnesium alloy. The metal casing needs to be insulated from the internal components. However, due to the complicated shape of the machine casing of the walkie-talkie, it is difficult to shape the casing of stainless steel. The main problem with aluminum/magnesium alloys is that they do not meet the safety requirements for explosion protection (because the exposed aluminum or magnesium alloys are more prone to sparks, see IEC 60079-0 2007), and the surface repainting does not meet the resistance requirements. When ordinary plastic is used as the outer casing of the walkie-talkie and the surface is sprayed with anti-static coating, the anti-static coating is easy to wear during the use of the explosion-proof walkie-talkie. At this time, it is difficult to meet the requirements of anti-static, and it is easy to cause danger. Compared with the above two methods, the use of a resin composition filled with a conductive filler to prepare an explosion-proof walkie-talkie housing is a relatively popular technique, and a commonly used conductive filler is a carbon material, a conductive metal material or other organic conductive agent. However, the main problem of this process is that since the addition amount of the conductive filler has an important influence on the toughness of the material, when the electrical resistivity needs to be precisely controlled, the toughness and rigidity of the material are not well balanced, and the material is either brittle or not. Either soft, not suitable for the outer casing of communication equipment. Summary of the invention

The problem to be solved by the present invention is to provide an antistatic composite material. Compared with the prior art, the antistatic composite material provided by the invention has both good antistatic properties and good mechanical properties.

In order to solve the above problems, the present invention provides an antistatic composite material, comprising: an antistatic layer formed by curing a first resin composition, and a conductive filler in the first resin composition;

An insulating support layer composited with the antistatic layer, wherein the insulating support layer is formed by curing a second resin composition.

Preferably, the conductive filler in the antistatic layer accounts for the weight percentage of the antistatic layer.

1%~20%.

Preferably, the conductive filler is a conductive carbon material and/or a conductive metal material.

Preferably, the conductive carbon material is selected from one or more of carbon fiber, carbon nanotube, graphite, graphene, activated carbon, and carbon black.

Preferably, the conductive metal material is selected from one or more of a stainless steel fiber, a low carbon steel fiber, an aluminum fiber, an aluminum alloy fiber, a magnesium fiber, and a magnesium alloy fiber.

Preferably, the first resin composition is a polyolefin resin, a polystyrene resin, an acrylic resin, a fluororesin, a polyamide resin, a polycarbonate, a polyether resin, a polysulfone resin, a polyacyl group. Imine resin, phenolic acid resin, amino resin or unsaturated polyester resin.

Preferably, the second resin composition is a polyolefin resin, a polystyrene resin, an acrylic resin, a fluororesin, a polyamide resin, a polycarbonate, a polyether resin, a polysulfone resin, or a polyacyl group. Imine resin, phenolic acid resin, amino resin or unsaturated polyester resin.

The present invention also provides a housing for an electronic device, which is made of the composite material according to any one of the above aspects, wherein the antistatic layer is used as an outer layer of the housing, and the insulating support layer is used as the shell. The inner layer of the body.

The invention also provides an electronic device comprising a housing of the electronic device.

Preferably, the electronic device is a walkie-talkie.

The present invention provides an antistatic composite material comprising an antistatic layer and an insulating support layer composited with the antistatic layer. Compared with the prior art, the antistatic layer in the composite material provided by the invention can make the composite material The material achieves good anti-static effect, and the insulating support layer can make the composite material have good mechanical properties, that is, the composite material provided by the invention can ensure good mechanical properties of the composite material while imparting good antistatic performance. DRAWINGS

Figure 1 is a schematic illustration of one mode of a composite material provided by the present invention;

2 is a schematic view of an embodiment of a walkie-talkie housing provided by the present invention. detailed description

In order to further understand the invention, the preferred embodiments of the present invention are described in the accompanying drawings.

As shown in FIG. 1 , a schematic view of a composite material provided by the present invention includes an antistatic layer 11 and an insulating support layer 12 compounded with the antistatic layer 11 , wherein the antistatic layer is composed of a first resin composition Forming is formed by forming a conductive filler in the first resin composition; and the insulating support layer is formed by curing the second resin composition.

According to the invention, the first resin polymer may be a polyolefin resin, a polystyrene resin, an acrylic resin, a fluororesin, a polyamide resin, a polycarbonate, a polyether resin, a polysulfone resin, One or a mixture of two or more of a polyimide resin, a phenolic resin, an amino resin, and an unsaturated polyester resin.

Specific examples of the polyolefin-based resin may be polyethylene resin, polybutene resin, poly-1-butene resin, poly 4-mercapto-1-pentene resin, ethylene-propylene copolymer, ethylene-acetic acid copolymer , ethylene-ethyl acrylate copolymer, but is not limited thereto.

Specific examples of the poly-glycol-based resin may be a polyvinyl chloride resin, a polyvinyl acetate resin, a polyvinyl alcohol resin, or a polyvinyl acetal resin. The polystyrene resin may be a polystyrene resin, a modified polystyrene resin, or an ABS plastic, but is not limited thereto.

Specific examples of the acrylic resin may be polydecyl methacrylate resin, decyl acrylate and styrene copolymer resins, decyl acrylate and acrylate copolymers, and poly-α-chloro acrylate. But it is not limited to this. Specific examples of the polyamide-based resin may be an aliphatic polyamide resin, a p-type polyamide and an mp-type polyamide, a poly-m-phenylene isophthalamide resin, a para-polyaramid, a polyparaphenylene Didecanoyltridecylhexamethylenediamine, but is not limited thereto.

Specific examples of the polycarbonate may be bisphenol A type polycarbonate, halogenated bisphenol A type polycarbonate, polyester polycarbonate, allyl diglycol carbonate, but are not limited thereto.

Specific examples of the polyether-based resin may be polyfurfural, polyphenylene ether, chlorinated polyether, polyphenylene sulfide, and polyetherketone, but are not limited thereto.

Examples of the amino resin may be a urea resin or a melamine furfural resin, but are not limited thereto. According to the present invention, the first resin composition is filled with a conductive filler, and the conductive filler preferably accounts for 1 to 20% by weight of the antistatic layer, more preferably 3 to 18%, and still more preferably 5 〜15%, more preferably 8-14%. The conductive filler is preferably a carbon material or a conductive metal material. Specific examples of the carbon material may be selected from one or more of carbon fiber, carbon nanotube, graphite, graphite, activated carbon, and carbon black, but are not limited thereto; the above-mentioned carbon material may be commercially available from the market. Or prepared according to the methods disclosed in the prior art. A specific example of the conductive metal material may be one or more selected from the group consisting of stainless steel fibers, low carbon steel fibers, aluminum fibers, aluminum alloy fibers, copper fibers, copper alloy fibers, lead, and lead alloy fibers.

According to the invention, the support layer is formed by curing of a second resin polymer, and the second resin polymer may be the same as or different from the first resin polymer. Specific examples of the second resin polymer may be a polyolefin resin, a polystyrene resin, an acrylic resin, a fluororesin, a polyamide resin, a polycarbonate, a polyether resin, a polysulfone resin, or a poly One or a mixture of two or more of an imide resin, a phenolic resin, an amino resin, and an unsaturated polyester resin, but is not limited thereto. Specific examples of the above-mentioned first resin polymer can be referred to as specific examples of the polyolefin resin, the polystyrene resin, the acrylic resin, the polyamide resin, the polycarbonate, the polyether resin, and the amino resin. However, it is not limited to the examples already given above.

According to the present invention, a coloring agent, a nucleating agent, an antioxidant, a heat stabilizer, a weathering agent, an ultraviolet absorber, a flame retardant, and an antibacterial agent may be added to the first resin composition or the second resin composition. The additive such as a reducing agent or a shrinkage preventing agent is preferably from 0.01% by weight to 10% by weight, more preferably 5% by weight or less, even more preferably 3% by weight or less.

According to the present invention, specific examples of the antioxidant are grouped with phenols, sulfur compounds or phosphorus. An antioxidant such as an organic compound, but is not limited thereto; specific examples of the ultraviolet absorber are, for example, benzotriazole, benzophenone or succinic acid, but are not limited thereto; specific examples of the stabilizer such as organic nickel a compound or a hindered amine or the like, but is not limited thereto; a specific example of the lubricant is a lubricant such as a metal salt of a high fatty acid or a higher fatty acid amide, but is not limited thereto; a specific example of the plasticizer such as phthalic acid a plasticizer such as an ester or a phosphate ester, but is not limited thereto; a specific example of the flame retardant is a flame retardant such as bromide, phosphate or red phosphorus, but is not limited thereto; a specific example of the pigment is talc, An inorganic pigment such as titanium oxide, iron oxide red, clay, silica white or calcium carbonate, or an organic pigment such as an azo pigment, a phthalocyanine pigment or a carbon ink, but is not limited thereto.

For the molding method of the composite material according to the present invention, extrusion molding, injection molding, curing molding, or the like can be used. For molding methods such as photocuring, infrared curing, and ultraviolet curing, it is preferred to use an injection molding method. When the composite material of the present invention is prepared by the above molding method, an overmolding method may be employed, that is, the antistatic layer is first formed, and then the insulating support layer is formed on the antistatic layer; The support layer is insulated, and then the antistatic layer is formed on the insulating support layer. According to the present invention, the composite material can also be produced by a method of simultaneously molding the antistatic layer and the insulating support layer.

The present invention also provides a housing of an electronic device made of the composite material, and specific examples of the electronic device are, for example, a communication device, a computer, a household appliance, an industrial appliance, an office appliance, etc., but are not limited thereto; Specific examples of the communication device are, for example, a walkie-talkie, a mobile phone, etc., but are not limited thereto. As shown in FIG. 2 , a schematic diagram of a housing of an electronic device provided by the present invention includes an antistatic layer 21 and an insulating support layer 22 connected to the antistatic layer, wherein the antistatic layer is external to the housing The insulating support layer serves as an inner layer of the casing, and an electrical connection piece 21a is further disposed at a position where the insulating support layer is exposed outside. The invention also provides an electronic device comprising the above described housing.

Compared with the prior art, the antistatic layer in the composite material provided by the invention can make the composite material achieve a good antistatic effect, and the insulating support layer can make the composite material have good mechanical properties, that is, the composite material provided by the invention is The composite material is guaranteed to have good mechanical properties while also imparting good antistatic properties.

The effects of the present invention are described below by way of specific examples, but the scope of the present invention is not limited by the following examples.

The materials used in the following examples are as follows:

(1) Carbon material: Carbon nanofibers, steam-grown carbon fibers made by Showa Denko;

Carbon black, KETJENBLACK EC-600JD manufactured by lionAgzo Co., Ltd. (hereinafter referred to as KB);

Carbon nanotubes: multi-walled carbon nanotubes produced by Nanjing Feimu Electronics Co., Ltd.;

Graphene: Single-layer graphene oxide produced by Nanjing Feimu Electronics Co., Ltd.;

(2) Conductive metal material: Stainless steel fiber: American RTP360.5 FRPC stainless steel fiber;

(3) Polyphenylene sulfide: PPS-1, linear PPS, melt viscosity 50 Pa. S, oligomer content 0.4% by weight, -SX basis amount 29 μmol/g;

(4) Polyphenylene ether: PPE-1, PPE having a reduced viscosity of 0.53 dl/g;

(5) Polystyrene: HIPS, H0103 manufactured by Japan Polystyrene Co., Ltd.;

(6) Polypropylene: PP, melting point 167 ° C, MFR = 4.6 (g/10 minutes);

(7) polyamide: PA, nylon 66, number average molecular weight is 14,000;

(8) Polybutylene terephthalate PBT, trade name Duranex.

(9) Polyamide elastomer: manufactured by ElfAtochem Chemical Co., Ltd., trade name PEBAX2533. (10) Polyethylene, Yanshan Petrochemical 2200J;

(11) Antioxidant PL-10 Beijing Institute of Chemical Industry;

(12) Light stabilizer 770 Beijing Research Institute of Chemical Industry;

(13) Iron oxide red is commercially available;

(14) Plasticizer, triethylene glycol diisooctanoate, commercially available;

(15) Flame retardant FANTONFT-2001M Elastomer TPE Dongguan Fantian Technology Co., Ltd.;

(16) Lubricant: 6589 plastic lubricant supplied by Huan Chemical Company.

Example 1

Antistatic layer components:

81% polyethylene, 16% carbon fiber, 2% antioxidant, 1% light stabilizer;

Support layer components:

97% polyethylene, 2% antioxidant, 1% light stabilizer;

The antistatic layer component and the support layer component were subjected to double injection molding to obtain a composite material, and an antistatic layer having a thickness of 1.5 mm and a support layer having a thickness of 1.6 mm were obtained, and mechanical properties and electrical properties were measured, which are shown in Table 2. Comparative example 1

The sheet was prepared using a ratio of 81% polyethylene, 16% carbon fiber, 2% antioxidant, and 1% light stabilizer.

The ratio of the raw materials of Examples 2 to 8 is shown in Table 1. The performance test results are shown in Table 2.

Table 1 Example 2 - Example 8, Comparative Example 1 - Comparative Example 8 Raw material ratio

Antistatic layer, insulating support layer

Raw material ratio thickness raw material ratio thickness

PPS -1: Carbon Nanofiber: Antioxidant: PPS-1: Antioxidant: Light Stabilizer

Example 2 1mm 1. 5mm Light Stabilizer =84 :12: 3:1 =96:3:1

Comparative Example 2 The ratio of raw materials is: PPS-1: Carbon nanofiber: Antioxidant: Light stabilizer =84 :12: 3:1 2. 0mm

PPE -1: Carbon black: Antioxidant: Light stable PPE-1: Antioxidant: Light stabilizer

Example 3 1.2 mm 1. 5mm agent =80: 18: 1:1 =98:1:1

Comparative Example 3 The ratio of raw materials is: PPE-1: Carbon black: Antioxidant: Light stabilizer = 80: 18: 1:1 2. 5 mm

HIPS: Carbon Nanotubes: Antioxidants: Oxidation HIPS: Antioxidants: Light Stabilizers

Example 4 1.5 mm 1. 5mm Iron Red =91:5:3:1 =96:3:1

Comparative Example 4 The ratio of raw materials was: HIPS: Carbon nanotubes: Antioxidant: Iron oxide red = 91 : 5: 3: 1 2. 4 mm

PP: Graphene: Antioxidant: Light stabilizer HIPS: Antioxidant: Iron oxide red

Example 5 1.3 mm 1. 6mm

=91:7:1:1 =95:2.5:2.5 Comparative Example 5 The ratio of raw materials is: PP: Graphene: Antioxidant: Light stabilizer =91 :7: 1:1 2. 2mm

PA: Carbon nanofiber: Antioxidant: Lubricating PEBAX2533: Antioxidant: Light stable Example 6 1.4 mm 1. 5mm Agent = 88: 10: 1:1 Agent = 96: 1.5: 3.5 Comparative Example 6 Raw material ratio is : PA: Carbon Nanofibers: Antioxidants: Lubricants = 88: 10: 1:1 2. 5 mm

PBT : Stainless Steel Fiber: Antioxidant: Run

Example 7 1.2 mm PBT: Antioxidant: Lubricant = 95 : 3: 2 1. 2 mm Slip agent = 80 : 18: 1:1

Comparative Example 7 The ratio of raw materials is: PBT: Stainless steel fiber: Antioxidant: Lubricant = 80:18: 1:1 2.2

PEBAX2533: Stainless steel fiber: anti-oxidation

Example 8 1.3 mm PBT: Light stabilizer = 97: 1:2 1. 3 mm Agent: Lubricant = 79: 19: 1:1

Comparative Example 8 The raw material ratio was: PEBAX2533: Stainless steel fiber: Antioxidant: Lubricant = 79: 19: 1: 1 1. 3 mm Table 2 Example 1 - Example 8 composite material performance test results

Tensile elongation

Tensile strength (MPa) resistance

(%) Quantity (MPa)

Example 1 64 120 2200 3.5X10 ⁶ Comparative Example 1 35 34 1600 2.2X10 ⁶ Example 2 62 105 2103 1.9X10 ⁶ Comparative Example 2 28 28 1450 1.9X10 ⁶ Example 3 56 96 1898 2.5X10 ⁶ Comparative Example 3 31 21 1560 2.5X10 ⁶ Example 4 57 112 1950 1.1X10 ⁶ Comparative Example 4 37 32 1580 1.1X10 ⁶ Example 5 69 95 2100 1.5X10 ⁶ Comparative Example 5 30 22 1360 1.5X10 ⁶ Example 6 60 114 2140 1.8X10 ⁶ Comparison Example 6 29 35 1250 1.8X10 ⁶ Example 7 60 128 1865 2.5X10 ⁶ Comparative Example 7 35 37 1356 2.5X10 ⁶ Example 8 54 98 1868 2.6X10 ⁶ Comparative Example 8 37 27 1542 2.6X10 ⁶ The results of Table 2 indicate that The composite material prepared by the invention has good strength and antistatic property. An antistatic composite material proposed by the present invention has been described by way of examples, and it is obvious that those skilled in the art can modify or appropriately modify the preparation method of the graphene described herein without departing from the scope, spirit and scope of the present invention. The invention is combined to implement the techniques of the present invention. It is to be understood that all such alternatives and modifications are obvious to those skilled in the art and are considered to be included in the spirit, scope and content of the invention.

Claims

Rights request

An antistatic composite material, comprising:

An antistatic layer, the antistatic layer is formed by curing of the first resin composition, and a conductive filler is present in the first resin composition;

An insulating support layer connected to the antistatic layer, wherein the insulating support layer is formed by curing a second resin composition.

The composite material according to claim 1, wherein the conductive filler in the antistatic layer accounts for 1% to 20% by weight of the antistatic layer.

The antistatic composite material according to claim 1, wherein the conductive filler is a conductive carbon material and/or a conductive metal material.

The composite material according to claim 3, wherein the conductive carbon material is one or more selected from the group consisting of carbon fibers, carbon nanotubes, graphite, graphene, activated carbon, and carbon black.

The composite material according to claim 4, wherein the conductive metal material is selected from the group consisting of stainless steel fiber, low carbon steel fiber, aluminum fiber, aluminum alloy fiber, copper fiber, copper alloy fiber, lead, lead alloy fiber. One or more of them.

The composite material according to any one of claims 1 to 5, wherein the first resin composition is a polyolefin resin, a polystyrene resin, an acrylic resin, a fluororesin, or a polyamide. Resin, polycarbonate, polyether resin, polysulfone resin, polyimide resin, phenolic resin, amino resin or unsaturated polyester resin.

The composite material according to any one of claims 1 to 5, wherein the second resin composition is a polyolefin resin, a polystyrene resin, an acrylic resin, a fluororesin, or a polyamide. Resin, polycarbonate, polyether resin, polysulfone resin, polyimide resin, phenolic resin, amino resin or unsaturated polyester resin.

A housing for an electronic device, comprising: the composite material according to any one of claims 1 to 7, wherein the antistatic layer serves as an outer layer of the housing, the insulating support layer As the inner layer of the casing.

9. An electronic device, comprising the housing of claim 8.

10. An electronic device according to claim 9, wherein said electronic device is a walkie-talkie.