CN102040833A - Halogen-free enhanced flame-retardant high-CTI value PA6 material for circuit breaker and preparation method thereof - Google Patents
Halogen-free enhanced flame-retardant high-CTI value PA6 material for circuit breaker and preparation method thereof Download PDFInfo
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- CN102040833A CN102040833A CN 201010580540 CN201010580540A CN102040833A CN 102040833 A CN102040833 A CN 102040833A CN 201010580540 CN201010580540 CN 201010580540 CN 201010580540 A CN201010580540 A CN 201010580540A CN 102040833 A CN102040833 A CN 102040833A
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Abstract
The invention discloses a halogen-free enhanced flame-retardant high-comparative tracking index (CTI) value polyamide6 (PA6) material for a circuit breaker and a preparation method thereof, and relates to a thermoplastic polymer fiber enhanced flame-retardant material and a preparation method thereof. The material solves the problem that the conventional halogen-free enhanced flame-retardant PA6 has low compatibility, low comparative tracking index (CTI value), poor mechanical property, low heat resistance and unqualified 960-degree glowing filament. The material is prepared from the following components: PA6 resin, glass fibers, a silane coupling agent, a complex halogen-free flame retardant, an antioxidant, a weather-resistant agent and a processing agent. The method for preparing the material comprises the following steps of: performing combinatorial optimization on an extruder screw, uniformly mixing the PA6 resin, the complex halogen-free flame retardant, the antioxidant and the processing agent and putting into a double-screw extruder; quantitatively adding the glass fibers, fully melting, compounding, extruding through a machine head, bracing wires, cooling, granulating and drying in the double-screw extruder; and finally, packaging. The product has the advantages of high CTI value, good flame retardant property, excellent mechanical property, high heat resistance and good performance of the glowing filament, and the preparation method is simple in process.
Description
Technical field
The present invention relates to high polymer material technology and engineering field, be specifically related to a kind of thermal plastic high polymer fiber reinforcement halogen-free flameproof high CTI value isolating switch with preparation methods and technology.
Background technology
Nylon be in the world kind at most, quote the widest engineering plastics.Principal item has: nylon 6 (PA6), nylon 66, NYLON610 etc.Nylon 6 is applied in numerous areas, but nylon 6 is inflammable, and the fire-retardant Nylon 6 of therefore developing high electric insulation usefulness is very necessary.
Flame-retardant modified most people of nylon 6 adopts the method for adding halogenated flame retardant at present.But tradition has halogen fire retardant more and more to be familiar with and to understand by people for human body and environment potential hazardness, and the use of halogen-free flame retardants becomes the development focus and the important directions of current fire retardant material day by day.Fiber glass reinforced halogen-free flame retardant PA6 is a kind of important halogen-free fire-resistant engineering plastics, is mainly used in fields such as electronic apparatus, iec switch.In the face of more and more stricter environmental protection and safety requirements, and industries such as electronics, electrical equipment, automobile, machinery instrument are to an urgent demand of Halogen, low cigarette, low-poison and combustion-resisting material, particularly on July 1st, 2006, European Union formally implemented the ROHS instruction, after " using some objectionable impurities instruction ", more urgent to the market requirement of bittern-free flame-proof material about restriction in electronic electric equipment.In the low-voltage apparatus field, halogen-free reinforced nylon is paid close attention to focuses on its good electric property, high heat resistance, chemical resistance, hot-air aging resistance, weathering resistance, and FV-2 can meet the demands for vertical combustion (1.6mm).
Summary of the invention
The objective of the invention is to have in order to solve present glass fiber reinforced halogen-free flame-retardant PA6 that consistency is poor, creepage trace index (CTI value) is low, poor heat stability, the not good problem of weathering resistance, the glass fiber reinforced halogen-free that provide a kind of electric property, thermostability, has excellent weather resistance strengthens fire-retardant high CTI value PA6 isolating switch material, especially case for circuit breaker material.
Another object of the present invention provides above-mentioned enhancing Halogen and strengthens fire-retardant high CTI value PA6 isolating switch preparation methods.
Technical scheme of the present invention is as follows:
Halogen strengthens fire-retardant high CTI value PA6 isolating switch material, by weight, comprises following ingredients:
Nylon 6: 60-70 part;
Glass fibre: 10-35 part;
Coupling agent: 0.2-0.5 part;
Halogen-free flame retardants: 10-15 part;
Phenolic antioxidant: 0.2-1 part;
Phosphite ester kind antioxidant: 0.2-1 part;
Weather resisting agent: 0.3-0.8 part;
Thermo-stabilizer 0.3-0.8 part; With
Processing aid: 0.2-1.5 part.
Described formation strengthens in the halogen-free flameproof high CTI value PA6 case for circuit breaker PP Pipe Compound can also add pigment, and the consumption of pigment adds according to the requirement to color.
Described glass fibre is the alkali free glass fibre of crossing through coupling agent treatment.
Described coupling agent is a silane coupling agent, as KH550, and KH560;
Described halogen-free flame retardants carries out composite processing with silane coupling agent, graft type polar silicone E525 by high mixer for the nitrogen flame retardant is MCA (melamine cyanurate) and MPP (polyphosphoric acid melamine).
Described composite being treated to nitrogen flame retardant MCA and nitrogen flame retardant MPP by mass parts 3～5: 1 mixed, put into high mixer with silane coupling agent, graft type polar silicone, mix to stir and emitted in 3-6 minute.
Described phenolic antioxidant is 1010 or AT10.
Described phosphite ester kind antioxidant is 168 or AT-168.
Described weather resisting agent is a hindered amine light stabilizer.
Described thermo-stabilizer is cuprous iodide, potassiumiodide, Zinic stearas or the above-mentioned substance mixture by the certain mass ratio.
Described processing aid is graft type polar silicone E525, surface-modifying agent TAF class material.
A kind of Halogen strengthens fire-retardant high CTI value PA6 isolating switch preparation methods, and it is characterized in that: its preparation method and technology may further comprise the steps:
(1) composite halogen-free flame retardants treatment process: two kinds of halogen-free flame retardantss, silane coupling agent, graft type polar silicone are put into high mixer, mix and stirred 3-6 minute, emit material and be composite halogen-free flame retardants;
(2) Nylon 6, silane coupling agent, composite halogen-free flame retardants, weather resisting agent, processing aid are put into high mixer, mix and stirred 2-5 minute, emit material and be the major ingredient that Halogen strengthens fire-retardant high CTI value PA6 isolating switch usefulness material;
(3) adjustment of screw combinations design: the production Halogen strengthens fire-retardant high CTI value PA6 isolating switch and must adjust screw combinations with the twin screw extruder of material, its glowing filament performance can reach design requirements, after screw combinations is adjusted, screw combinations has 11 groups of 45 cutouts of spending, 1 group of the cutout of 60 degree, 4 groups of the cutouts and the transfer block of 90 degree are some;
(4) the preparation Halogen strengthens fire-retardant high CTI value PA6 isolating switch material: Halogen is strengthened fire-retardant high CTI value PA6 isolating switch send in the twin screw extruder by feed screw with the material major ingredient, regulating the feeding rotating speed is 8-10HZ, screw speed is 350～400rpm, content of glass fiber is controlled at 15～35%, glass fibre adds from spout, the temperature of each of twin screw extruder section temperature from the charging opening to the head is respectively 220 ℃, 240 ℃, 240 ℃, 245 ℃, 230 ℃, 230 ℃, 220 ℃, 245 ℃, 235 ℃, 240 ℃, the length-to-diameter ratio of twin screw extruder is 40, under the conveying and shearing action of twin screw extruder, abundant fusion plastification, kneading mixes, extrude through head, tie rod, cooling, pelletizing, drying, packing at last; Promptly obtain Halogen and strengthen fire-retardant high CTI value PA6 isolating switch material.
Beneficial effect of the present invention
The present invention selects Halogen compound flame retardant efficiently for use, coat voluntarily, when fire retardant reaches 12% (glass fiber content 20%), the creepage trace index can reach 600v, extinguish in the glowing filament 960 degree 15S, flame retardant rating can reach vertical combustion (1.6mm) FV-2, and the fire retardant consumption is few, has reduced the influence of fire retardant to material mechanical performance; Mechanical property is good, and tensile strength can reach 80MPa, and flexural strength can reach 120MPa, the socle girder notch shock can reach 6.2kj/m2, adds hindered phenol antioxygen and phosphonate mixing heat-resistant agent, and heat-drawn wire can reach 200 degree (1.82MPa), add hindered amine light stabilizer, weathering resistance is good.
Embodiment
Halogen of the present invention strengthens fire-retardant high CTI value PA6 isolating switch with preparation methods and technology thereof, comprises the steps:
(1) the composite processing (proportioning is by mass parts) of halogen-free flame retardants: composite halogen-free flame retardants (92-96%), silane coupling agent KH560 (1-4%), graft type polar silicone E525 (3%-5%) are put into high mixer, mix and stirred 3-6 minute, emit material and be composite halogen-free flame retardants; Nitrogen flame retardant low toxicity, burn into is not to heat and ultraviolet temperature, good flame retardation effect and cheap; Shortcoming is that it is dispersed relatively poor in base material.After the present invention coats processing with it, overcome the shortcoming of bad dispersibility, good dispersion property;
(2) Nylon 6, toughner, silane coupling agent, composite halogen-free flame retardants, oxidation inhibitor, weather resisting agent, processing aid are put into high mixer, mix and stirred 2-5 minute, emit material and be the major ingredient that Halogen strengthens fire-retardant high CTI value PA6 isolating switch usefulness material;
(3) adjustment of screw combinations design: the production Halogen strengthens fire-retardant high CTI value PA6 isolating switch and must adjust screw combinations with the twin screw extruder of material, and its glowing filament performance can reach design requirements.
(4) the preparation Halogen strengthens fire-retardant high CTI value PA6 isolating switch material: Halogen is strengthened fire-retardant high CTI value PA6 isolating switch send in the twin screw extruder by feed screw with the major ingredient of material, regulating the feeding rotating speed is 8-10HZ, screw speed is 350～400rpm, content of glass fiber is controlled at 17～25%, glass fibre adds from spout, the temperature of each of twin screw extruder section temperature from the charging opening to the head is respectively 220 ℃, 240 ℃, 240 ℃, 245 ℃, 230 ℃, 230 ℃, 220 ℃, 245 ℃, 235 ℃, 240 ℃, the length-to-diameter ratio of twin screw extruder is 40, under the conveying and shearing action of twin screw extruder, abundant fusion plastification, kneading mixes, extrude through head, tie rod, cooling, pelletizing, drying, packing at last; Promptly obtain Halogen and strengthen fire-retardant high CTI value PA6 isolating switch material.
Embodiment 1:
Nylon 6: 71.8 parts;
Glass fibre: 15 parts;
0.2 part of coupling agent KH560;
Composite halogen-free flame retardants: 12 parts;
Antioxidant 1010: 0.2 part;
168 0.2 parts in oxidation inhibitor;
245 0.3 parts of weather resisting agent Irganox;
0.3 part of thermo-stabilizer-cuprous iodide
Processing aid: 1 part.
Embodiment 2:
Nylon 6: 65.8 parts;
Glass fibre: 20 parts;
Coupling agent: 0.2 part;
Halogen-free flame retardants: 12 parts;
Antioxidant 1010: 0.2 part;
168 0.2 parts in oxidation inhibitor;
Weather resisting agent Irganox 245:0.3 part;
0.3 part of thermo-stabilizer-potassiumiodide
Processing aid: 1 part.
Embodiment 3:
Nylon 6: 60.7 parts;
Glass fibre: 24 parts;
Coupling agent KH560:0.3 part;
Halogen-free flame retardants: 13 parts;
Antioxidant 1010: 0.2 part;
Oxidation inhibitor 168:0.2 part;
Weather resisting agent Irganox 245:0.3 part;
0.3 part of thermo-stabilizer-Zinic stearas
Processing aid: 1 part.
The Halogen of embodiment 1～3 routine gained strengthens fire-retardant high CTI value PA6 isolating switch and has the better opering characteristic of electric apparatus with material, creepage trace index (CTI value) can reach 600V, glowing filament 960 degree extinguished in 15 seconds, and this PP Pipe Compound has the good mechanical performance simultaneously, tensile strength can reach 80MPa, flexural strength can reach 120MPa, and the socle girder notch shock can reach 6.2kj/m2, Heat stability is good, weathering resistance is good, and heat-drawn wire can reach 200 degree advantages such as (1.82MPa).
Above-mentioned only is specific embodiments of the invention, but design concept of the present invention is not limited thereto, and allly utilizes this design that the present invention is carried out the change of unsubstantiality, all should belong to the behavior of invading protection domain of the present invention.
Claims (9)
1. a Halogen strengthens fire-retardant high CTI value PA6 isolating switch material, it is characterized in that, by weight percentage, comprising:
Nylon 6: 60-70 part;
Glass fibre: 10-35 part;
Coupling agent: 0.2-0.5 part;
Halogen-free flame retardants: 10-15 part;
Phenolic antioxidant: 0.2-1 part;
Phosphite ester kind antioxidant: 0.2-1 part;
Weather resisting agent: 0.3-0.8 part;
Thermo-stabilizer 0.3-0.8 part; With
Processing aid: 0.2-1.5 part.
2. Halogen according to claim 1 strengthens fire-retardant high CTI value PA6 isolating switch material, it is characterized in that, described halogen-free flameproof high CTI value PA6 isolating switch is with also adding pigment in the material, and the consumption of pigment adds according to the requirement to color.
3. Halogen according to claim 1 strengthens fire-retardant high CTI value PA6 isolating switch material, it is characterized in that, described glass fibre is the alkali free glass fibre of crossing through coupling agent treatment.
4. Halogen according to claim 1 strengthens fire-retardant high CTI value PA6 isolating switch material, it is characterized in that described halogen-free flame retardants is the nitrogen flame retardant.
5. Halogen according to claim 4 strengthens fire-retardant high CTI value PA6 isolating switch material, it is characterized in that, described halogen-free flame retardants is through composite processing, described composite being treated to nitrogen flame retardant MCA and nitrogen flame retardant MPP by mass parts 3～5: 1 mixed, put into high mixer with silane coupling agent, graft type polar silicone, mix to stir and emitted in 3-6 minute.
6. Halogen according to claim 1 strengthens fire-retardant high CTI value PA6 isolating switch material, it is characterized in that described weather resisting agent is a hindered amine light stabilizer.
7. Halogen according to claim 1 strengthens fire-retardant high CTI value PA6 isolating switch material, it is characterized in that thermo-stabilizer is cuprous iodide, potassiumiodide, Zinic stearas or the above-mentioned substance mixture by the certain mass ratio.
8. Halogen according to claim 1 strengthens fire-retardant high CTI value PA6 isolating switch material, it is characterized in that described processing aid is calcium stearate, graft type polar silicone or surface-modifying agent TAF class material.
9. a Halogen strengthens fire-retardant high CTI value PA6 isolating switch preparation methods, it is characterized in that, comprises the steps:
(1) processing of composite halogen-free flame retardants: with nitrogen flame retardant MCA, nitrogen flame retardant MPP, silane coupling agent, graft type polar silicone are put into high mixer, mix and stir 3-6 minute, emit material and are composite halogen-free flame retardants;
(2) Nylon 6, silane coupling agent, composite halogen-free flame retardants, oxidation inhibitor, weather resisting agent, thermo-stabilizer, processing aid are put into high mixer, mix and stirred 2-5 minute, emit material and be the major ingredient that Halogen strengthens fire-retardant high CTI value PA6 isolating switch usefulness material;
(3) adjustment of screw combinations design: screw combinations has 11 groups of 45 cutouts of spending, 1 group of the cutout of 60 degree, and 4 groups of the cutouts and the transfer block of 90 degree are some;
(4) the preparation Halogen strengthens fire-retardant high CTI value PA6 isolating switch material: Halogen is strengthened fire-retardant high CTI value PA6 isolating switch send in the twin screw extruder by feed screw with the major ingredient of material, content of glass fiber is controlled at 10～35%, glass fibre adds from spout, the temperature of twin screw extruder is 220-250 ℃, the length-to-diameter ratio of twin screw extruder is 30-40, under the conveying and shearing action of twin screw extruder, fully fusion plastification, kneading mix, through head extrude, tie rod, cooling, pelletizing, drying, packing at last; Promptly obtain Halogen and strengthen fire-retardant high CTI value PA6 isolating switch material.
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| CN102786779A (en) * | 2011-05-16 | 2012-11-21 | 山东道恩高分子材料股份有限公司 | High-impact glass fiber reinforced halogen-free flame retardation PBT material |
| CN103304992A (en) * | 2013-06-14 | 2013-09-18 | 慈溪金岛塑化有限公司 | High-glow-wire initiation temperature flame-retardant nylon composition |
| CN104403310A (en) * | 2014-10-31 | 2015-03-11 | 浙江俊尔新材料股份有限公司 | High-comparative tracking index (CTI) flame-retardant polyamide dyeing material and preparation method thereof |
| CN104592747A (en) * | 2015-01-30 | 2015-05-06 | 江苏弘盛新材料股份有限公司 | Photothermal-resistant and flame-retardant polyamide 6 as well as preparation method and application of photothermal-resistant and flame-retardant polyamide 6 |
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| CN103304992A (en) * | 2013-06-14 | 2013-09-18 | 慈溪金岛塑化有限公司 | High-glow-wire initiation temperature flame-retardant nylon composition |
| CN103304992B (en) * | 2013-06-14 | 2015-11-18 | 慈溪金岛塑化有限公司 | A kind of high glowing filament ignition temperature flame-retardant nylon composition |
| CN104693629A (en) * | 2013-12-06 | 2015-06-10 | 上海杰事杰新材料(集团)股份有限公司 | A flame-retardant polystyrene/polyamide blended alloy material and a preparing method thereof |
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