CN1935928A - Thermoplastic antistatic material and its processing method - Google Patents
Thermoplastic antistatic material and its processing method Download PDFInfo
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- CN1935928A CN1935928A CN 200610069283 CN200610069283A CN1935928A CN 1935928 A CN1935928 A CN 1935928A CN 200610069283 CN200610069283 CN 200610069283 CN 200610069283 A CN200610069283 A CN 200610069283A CN 1935928 A CN1935928 A CN 1935928A
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Abstract
The invention relates to thermal plasticity antistatic material and its processing technique. It includes the following steps: using thermal plasticity material as main body, conductivity continuous fiber as antistatic agent, using extruding technology; the continuous fiber is directly processed dipping, cladding, extruding, cooling, granulating without screw shearing; adjusting conducting fiber length-to-diameter factor to endow material antistatic ability designability to support lower reaches products processing. The conducting fiber has little addition level, good processing property, combination property, supports lower reaches products processing, and especially fits for injection molding. The processing method adopts common extruder processing equipment, realizes by setting special machine exit mold, has short preparation cycle and low cost.
Description
One, technical field
The invention belongs to anti-static function material technology field, relate to thermoplastic antistatic functional materials and processing technology thereof simultaneously.
Two, background technology
There is strict antistatic requirement in the field that antistatic requirement is arranged in electronics, electrical equipment, colliery, oil field etc. to some product and component housing, and the anti-static thermoplastic material is to adopt inner interpolation and/or two kinds of methods of external treatment to make traditionally.The inner interpolation is at the inner conductive agent that adds of polymkeric substance, comprise that materials such as metal and metal oxide powder, conductive carbon black, ionogenic surfactant, electro-conductive fiber add electro-conductive fiber after extruder screw is sheared, the length-to-diameter ratio conservation rate of fiber is lower, can not effectively form network each other between fiber, thereby influence conductivity, must improve antistatic property by improving addition; Add the positive and negative ionic surface active agent, material is obvious to the dependence of the humidity of environment for use, and antistatic effect is good during high humidity, and humidity is weak effect hour then; Add static inhibitor such as metal and metal oxide powder, conductive carbon black, addition is big, manufacturability is poor, material strength losses is big, color is single.The common problem that traditional inside addition means exists is that addition is big, manufacturability is poor, the mechanical strength loss is big, color is single.
At technology and the unfavorable problem of material over-all properties that traditional diamond-making technique exists, some new working method researchs have been carried out in recent years both at home and abroad in succession.
CN 02822494 discloses a kind of thermoplastic polymer composition of conduction, its static inhibitor constitutes with a kind of steel fiber and metal coat fiber synergistic combination, be not more than 20mm with length, length-to-diameter ratio is not less than 200 antistatic fibre as static inhibitor, adopt melt blending prepared anti-static thermoplastic material, the straight forming goods, effectively to avoid the loss of fiber length-to-diameter ratio in the formed product process, but the antistatic material of this method processing is applicable to the straight forming goods, is not suitable for derived product processing.
CN 01134255 discloses a kind of continuous fibre particulate composite and manufacture method thereof, the course of processing comprises that successively fiber dispersion, the first macromolecular material dipping, oven dry, the collection of filaments, first macromolecular material coat, steps such as oven dry, pelletizing, form the granular composite material that steel fiber runs through both ends of the surface, can directly adopt the normal injection machine to carry out product molding processing.But this method manufacturing procedure is more, and energy consumption is big.
Three, summary of the invention
The present invention is directed to the deficiency that prior art exists, a kind of electro-conductive fiber length-to-diameter ratio conservation rate height is provided, antistatic effect is good, supports the thermoplastic antistatic material and the working method thereof of derived product processing.
The thermoplastic antistatic material that the present invention relates to is based on thermoplastic material, with the electroconductibility continuous fibre is static inhibitor, employing expressing technique processing, continuous fibre without screw rod shearing directly flood, coating, extruding, cooling, granulation and get, pellet basic structure is seen accompanying drawing 1.
The thermoplastic antistatic material that the present invention relates to, feedstock composition contains at least:
Thermoplastic resin 90-99 mass parts
Continuous conduction fiber 1-9 mass parts
Other auxiliary agents 1-2 mass parts
The thermoplastic antistatic material that the present invention relates to, feedstock composition contains at least:
Thermoplastic resin 90-99 mass parts
Continuous conduction fiber 1-9 mass parts
Other auxiliary agents 1-2 mass parts
Fire-retardant filler, toughner, toughener 10-50 mass parts
The thermoplastic antistatic material that the present invention relates to, used thermoplastic material includes but not limited to general-purpose plastics, engineering plastics, special engineering plastics.Plastics variety is selected from a kind of or wherein several mixture among PP, PE, ABS, PA, PC/ABS, PA/PPS, POM, PET, PC, PPS, the PEEK, a kind of or wherein several mixture among preferred PC, PP, ABS, PA, the PC/ABS.
The thermoplastic antistatic material that the present invention relates to, used fiber is the fiber with electroconductibility, be selected from a kind of or wherein several combination in Stainless Steel Fibre, copper fiber, nickel fiber, carbon fiber, metallizing carbon fiber, the metallized glass fiber, a kind of or wherein several combination in preferred Stainless Steel Fibre, copper fiber, carbon fiber and the metallizing carbon fiber.Fibrous texture is selected from monfil or tow, preferred non-twist tow.
The thermoplastic antistatic material that the present invention relates to, in the final material electro-conductive fiber length-to-diameter ratio between 300 to 1000, preferred 400 to 600.
The manufacture method of the thermoplastic antistatic material that the present invention relates to, adopting expressing technique to carry out (work flow is illustrated in accompanying drawing 2) further mixes thermoplastic material and required auxiliary agent and heating and melting at feed system, to introduce thermoplastic material by extrusion neck ring mold 4 through the electro-conductive fiber 1 of preheating and melt body 2, directly flood without screw rod shearing; Realize the coating of thermoplastic material by coating mouthful mould 5, force dipping and typing through extrusion system 6 again,, obtain target material 3 (structure as shown in Figure 1) after the granulation through cooling to fiber.
The thermoplastic antistatic material manufacture method that the present invention relates to, electro-conductive fiber is along introducing special-purpose extrusion neck ring mold 4 perpendicular to feed direction, and molten materials 2 mixes, floods with electro-conductive fiber 1 in extrusion neck ring mold 4 by feed alley 42.Special-purpose extrusion neck ring mold 4 adopts comparison to extrude cable and coats with die geometry (a kind of structure as shown in Figure 3), have in the mouth mould and the mobile vertical bending channel 41 of direction of molten materials, the molten materials passage 42 that links to each other with forcing machine, bending channel 41 is communicated with molten materials passage 42.Molten materials 2 electro-conductive fibers 1 in bending channel 41 with molten materials passage 42 in mobile molten materials 2 mix, flood.
The used extrusion neck ring mold of thermoplastic antistatic material processing units that the present invention relates to, adopt comparison to extrude cable coating die geometry, the continuous conduction fiber is along introducing perpendicular to feed direction, in the mouth mould, realize fiber and resin mix and resin to dipping, the coating of fiber.
The thermoplastic antistatic material manufacture method that the present invention relates to, described extrusion system 5 is made up of the pressure roller of a pair of and/or a pair of above adjustable gaps, adjusts controlled target material physical dimension by roll spacing.
Adopt the thermoplastic antistatic material volume specific resistance that relates to of the present invention to be not more than 10
6Ω cm is by the length-to-diameter ratio adjustment of electro-conductive fiber, the designability of giving the material antistatic effect.The addition of electro-conductive fiber is little, good processability, and excellent combination property is specially adapted to injection molding.
The thermoplastic antistatic material working method that the present invention relates to adopts general forcing machine processing units, realizes that by equipped special machine outlet mould the preparatory period is short, cost is low.
Four, description of drawings
Accompanying drawing 1 product structure sectional schematic diagram
Accompanying drawing 2 work flow synoptic diagram
Accompanying drawing 3 extrusion neck ring mold flow passage structure synoptic diagram
Wherein: 1-electro-conductive fiber, 2-thermoplastic resin, 3-antistatic material particle, the antistatic material bar 4-extrusion neck ring mold of 31-dipping, 41-bending channel, the happy and harmonious material channel of 42-, 5-extrusion system
Five, embodiment
Below in conjunction with embodiment invention is related to technical scheme and be elaborated, but not as the restriction to summary of the invention.
Embodiment one
99 parts of the 141R polycarbonate that GE company produces, 1 part of Hunan Hui Tong company 8 μ m Stainless Steel Fibre, 2 parts of auxiliary agents such as look mother, dispersion agent, oxidation inhibitor.
Polycarbonate placed 3h to 6h in 120 ℃ to 130 ℃ baking ovens after, mix fusion plastification in forcing machine, 230 ℃ to 280 ℃ of plasticization temperature scopes with other auxiliary agents such as look mother, dispersion agent, oxidation inhibitor; To introduce fiber entry through the Stainless Steel Fibre of preheating with the pulling speed of 5m/min to 15m/min, be 400 to 500 anti-static polycarbonate pellet through the length-to-diameter ratio control of extruding, pushing, cooling, granulation obtaining fiber.
The tensile strength 65MPa of sample, volume specific resistance 7 * 10
5
Embodiment two
On mould 90 parts of the 18 M20 PA66 of factory materials, the Hunan favour is with 9 parts of novel material company 6 μ m Stainless Steel Fibres, 2 parts of auxiliary agents such as look mother, dispersion agent, oxidation inhibitor, 10 parts of fire retardants.
The preparation technology of flame-retardant and anti-static PA66 material is with embodiment one, PA66 preliminary drying condition is to place 8h to 16h in 85 ℃ to 100 ℃ baking ovens, fire retardant is being extruded the adding of pusher side feeding place, and plasticization temperature is 230 ℃ to 290 ℃, and the length-to-diameter ratio of Stainless Steel Fibre is 500 to 600.Tensile strength of material 120MPa, volume specific resistance 10
4Ω cm.
Embodiment three
96 parts of Yanshan Petrochemical 1300 polypropylene, 4 parts of INCO technology company nickel-coated carbon fibers, 1 part of auxiliary agent such as look mother, dispersion agent, oxidation inhibitor, 50 parts in glass fibre.
Strengthen antistatic polypropylene preparation technology with embodiment 1, polypropylene preliminary drying condition is to place 2h to 5h in 70 ℃ to 90 ℃ baking ovens, and plasticization temperature is 200 ℃ to 230 ℃, and the length-to-diameter ratio of nickel-coated carbon fibers is 400 to 500.Tensile strength of material 65MPa, volume specific resistance 4 * 10
5Ω cm.
Embodiment four
95 parts of PC/ABS alloys, the Hunan favour adds in 1: 1 ratio with the T-700 carbon fiber that novel material company 6 μ m Stainless Steel Fibres and Dong Li company produce, and amounts to 5 parts, 1 part of auxiliary agent such as look mother, dispersion agent, oxidation inhibitor.
Antistatic PC/ABS alloy preparation technology is with embodiment 1, fusion plastification in 200 ℃ to 235 ℃ forcing machine, and the preliminary drying condition is with embodiment 1, and expressing technique is with embodiment 1, and specimen preparation technology is with embodiment 1.The length-to-diameter ratio of electro-conductive fiber is 300 to 400.Material tests result is: tensile strength 75MPa, volume specific resistance reaches 1.2 * 10
5Ω cm.
Embodiment five
97 parts of Yixing, Jiangsu chemical reagent factory NYLON610 materials, 3 parts of INCO technology company nickel-coated carbon fibers, 1 part of auxiliary agent such as look mother, dispersion agent, oxidation inhibitor, 35 parts in glass fibre, 10 parts of toughner.
Antistatic PQ610 material is placed 8h to 16h in 85 ℃ to 100 ℃ baking ovens after, after mixing with other auxiliary agents such as look mother, toughner, dispersion agents, fusion plastification in 220 ℃ to 270 ℃ forcing machine, and add at the forcing machine glass and mouthful to introduce a glass.The length-to-diameter ratio of nickel-coated carbon fibers is 900 to 1000, and expressing technique is with embodiment 1, and specimen preparation technology is with embodiment 1.
Material tests result is: tensile strength 135MPa, volume specific resistance reaches 3 * 10
5Ω cm.
Embodiment six
97 parts of the polyphenyl thioether materials that Zi Gong, Sichuan special plastic factory produces, the Hunan favour adds in 1: 1 ratio with the nickel plating glass fibre of novel material company 6 μ m Stainless Steel Fibres and Nanjing glass institute, and totally 3 parts, 1 part of auxiliary agent such as dispersion agent, oxidation inhibitor, 35 parts in glass fibre, 10 parts of toughner.
The PPS material is placed 3h to 6h in 120 ℃ to 150 ℃ baking ovens after, after mixing with other auxiliary agents such as toughner, dispersion agents, fusion plastification in 250 ℃ to 300 ℃ forcing machine, and add at the forcing machine glass and mouthful to introduce a glass.Electro-conductive fiber is Stainless Steel Fibre and nickel plating glass fibre, and the length-to-diameter ratio of electro-conductive fiber is 800 to 900, and expressing technique is with embodiment 1, and specimen preparation technology is with embodiment 1.
Material tests result is: tensile strength 142MPa, volume specific resistance reaches 1.2 * 10
5Ω cm.
Embodiment seven
94 parts of PPS/PA66 alloys, INCO technology company nickel-coated carbon fibers and Hunan favour are with 6 parts of novel material company 6 μ m Stainless Steel Fibres, and the ratio of nickel-coated carbon fibers and Stainless Steel Fibre is 2: 1,1 part of auxiliary agent such as dispersion agent, oxidation inhibitor, 50 parts in glass fibre.
The PPS/PA66 alloy material is placed 5h to 10h in 100 ℃ to 130 ℃ baking ovens after, after mixing with other auxiliary agent, fusion plastification in 240 ℃ to 300 ℃ forcing machine, and add at the forcing machine glass and mouthful to introduce a glass.Electro-conductive fiber is nickel-coated carbon fibers and Stainless Steel Fibre, and the electro-conductive fiber length-to-diameter ratio is 700 to 800, and expressing technique is with embodiment 1, and specimen preparation technology is with embodiment 1.
Material tests result is: tensile strength 150MPa, volume specific resistance reaches 3 * 10
4Ω cm.
Claims (8)
1 one kinds is the thermoplastic antistatic material of static inhibitor with the electroconductibility continuous fibre, and volume specific resistance is not more than 10
6Ω cm, feedstock composition contains at least:
Thermoplastic resin 90-99 mass parts
Continuous conduction fiber 1-9 mass parts
Other auxiliary agents 1-2 mass parts.
The described thermoplastic antistatic material of 2 claims 1, volume specific resistance is not more than 10
6Ω cm, feedstock composition contains at least:
Thermoplastic resin 90-99 mass parts
Continuous conduction fiber 1-9 mass parts
Other auxiliary agents 1-2 mass parts
Properties-correcting agent 10-50 mass parts such as fire-retardant filler, toughner, toughener.
The used continuous conduction fiber of the described thermoplastic antistatic material of 3 claims 1 is selected from a kind of or wherein several combination in Stainless Steel Fibre, copper fiber, nickel fiber, carbon fiber, metallizing carbon fiber, the metallized glass fiber.
The described thermoplastic antistatic material of 4 claims 1, described thermoplastic material are selected from a kind of or wherein several combination in general-purpose plastics, engineering plastics, the special engineering plastics.
The described thermoplastic antistatic material of 5 claims 4, a kind of or wherein several combination among described thermoplastic material PP, PE, ABS, PA, POM, PET, PC, PPS, the PEEK.
The described thermoplastic antistatic material of 6 claims 5, a kind of or wherein several group among the preferred PC of described thermoplastic material, PP, ABS, PA, PC, the PPS.
The working method of the described thermoplastic antistatic material of 7 claims 1 adopts expressing technique to carry out, and its characteristics are: by special-purpose extrusion neck ring mold (4) electro-conductive fiber (1) is introduced thermoplastic material and melt body (2); Realize the coating of thermoplastic material by coating a mouthful mould (5) to fiber; Force dipping and typing through extrusion system (6).
The used working method of the described thermoplastic antistatic material of 8 claims 7, described extrusion system (6) is made up of the pressure roller of a pair of and/or a pair of above adjustable gaps.
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| CN 200610069283 CN1935928A (en) | 2006-10-13 | 2006-10-13 | Thermoplastic antistatic material and its processing method |
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| CN101928422A (en) * | 2010-04-26 | 2010-12-29 | 大连理工大学 | Method for preparing polymer matrix conductive and heating composite film material |
| CN101974222A (en) * | 2010-10-21 | 2011-02-16 | 深圳市华力兴工程塑料有限公司 | Process for preparing copper fiber modified conductive engineering plastic |
| CN101759921B (en) * | 2008-12-26 | 2012-10-17 | 上海普利特复合材料股份有限公司 | Novel antistatic polypropylene material and preparation method thereof |
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| CN103030879A (en) * | 2011-09-29 | 2013-04-10 | 合肥杰事杰新材料股份有限公司 | Environment-friendly flame retardance permanent antistatic polypropylene material and preparation method of environment-friendly flame retardance permanent antistatic polypropylene material |
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| CN110452504A (en) * | 2019-08-14 | 2019-11-15 | 凌云工业股份有限公司上海凌云汽车研发分公司 | A kind of preparation method of the automobile flame-proof battery case upper cover with electro-magnetic screen function |
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- 2006-10-13 CN CN 200610069283 patent/CN1935928A/en active Pending
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| CN101928422A (en) * | 2010-04-26 | 2010-12-29 | 大连理工大学 | Method for preparing polymer matrix conductive and heating composite film material |
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| CN103030879A (en) * | 2011-09-29 | 2013-04-10 | 合肥杰事杰新材料股份有限公司 | Environment-friendly flame retardance permanent antistatic polypropylene material and preparation method of environment-friendly flame retardance permanent antistatic polypropylene material |
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| WO2018036017A1 (en) * | 2016-08-24 | 2018-03-01 | 五行科技股份有限公司 | Antistatic molding composition comprising conductive fiberglass, and method of preparing same |
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