CN101798460B - Composite flame retardant glass fibre reinforced nylon 66 insulating strip and preparation method thereof - Google Patents
Composite flame retardant glass fibre reinforced nylon 66 insulating strip and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a composite flame retardant glass fibre reinforced nylon 66 insulating strip. The insulating strip comprises the following components: nylon resin, glass fibre, inorganic packing, flexibilizer, coupling agent, dispersing lubricant, antioxidant, light stabilizer, heat stabilizer, composite flame retardant and master batch, wherein the composite flame retardant is a combination of nitrogen flame retardant and/or phosphorus flame retardant and/or nitrogen-phosphorus flame retardant and inorganic metal compound retardant. The invention also discloses a preparation method of the insulating strip. The product of the invention has no halogen, excellent mechanical property and stable dimension of sectional material, solves the problems of the prior art that the halogen-containing fire retardant product generates dense smoke and corrosive gas and has toxicity when used for antiflaming and reduces the secondary disaster caused by the problems; and the problems of the prior art that the dosage of the non-halogen flame retardant is too large and the compatibility is not good, are solved, the influence of using the flame retardant on the overall mechanical performance of the product is avoided, good antiflaming effect is obtained, and the product satisfies and expands the needs of customers and market.
Description
Technical field
The present invention relates to the engineering plastics production technical field, relate in particular to a kind of composite flame retardant glass fibre reinforced nylon dragon heat insulating strip that is used for aluminum alloy doors and windows and preparation method thereof.
Background technology
At present, the building energy conservation heat-insulation aluminum section generally adopts disconnected hot cold bridge technology, to reach the purpose of heat-insulating and energy-saving.Being connected the centre of inside and outside aluminum alloy frame as the heat insulating strip of disconnected hot cold bridge, not only must be a kind of fabulous lagging material, and its intensity and ageing resistance must satisfy the requirement of aluminum alloy doors and windows.Traditional prior art adopts plastics such as PVC, ABS to produce heat insulating strip usually, but its output, quality are low, find that in use its performance can not satisfy request for utilization at all, but also exist serious potential safety hazard.For this reason; This lagging material R and D have widely been carried out both at home and abroad; Be master's heat insulation section wherein,, can play the effect of trap heat conduction because its thermal conductivity is little with glass fiber reinforced nylon 66 matrix materials; And it is ageing-resistant, high and low temperature resistance, chemical resistance and dimensional stability are high; Linear expansivity and duraluminum are very approaching, have simultaneously also improved the performance advantage of aluminum alloy doors and windows at resistance to air loss, watertightness, Wind-Pressure Resistance, aspect such as anti-pollution, thereby can satisfy the requirement of heat insulating strip very-high performance.
Along with the progress of science and technology and the requirement of industrial development; Novel and glass fiber reinforced nylon 66 Application Areass modification are constantly widened; Make its environment for use that faces more and more harsher; Like high temperature, high humidity, high-voltage and high loading etc., the flame retardant resistance of material is one of them very important index.Not only require glass fiber reinforced nylon 66 to have higher mechanical property; And need it under the prerequisite that keeps outstanding mechanical property; Flame retardant properties is further enhanced, so 6 flame-retardant modified researchs more and more receive people's attention to glass fiber reinforced nylon 6.All there are strict requirements to flame retardant of plastic property in many countries.
PA66 after the glass enhancing modified, glass play the enhancement of skeleton structure formula in PA66.When receiving when loading, owing to the existence of glass, make load along the glass transfers, stress is stoped the growth of crackle by diffusion rapidly, so the increase of glass fiber content, and the mechanical property of PA66 is improved.But because after adding spun glass, spun glass has played " candle wick " effect, its burning grade is descended, reduce to the HB level by the V-2 level; Oxygen index is reduced to 21% (30% glass) by 24.3%.So it is fire-retardant more difficult than making PA66 to make glass strengthen PA66 fire-retardant (UL94V-0 level).Simultaneously, the flame retardant products overwhelming majority of at present relevant PA66 is the basis with the halide-containing, and the dense smoke that produces when fire-retardant, toxicity, corrosive gases bring disaster for production, application and environment.
Because it is harsh that the glass fiber enhanced nylon 66 heat insulating strip requires at aspects such as mechanical property, outward appearance, size, processing fluidities, increased the difficulty that aspects such as formula for a product design, complete processing, die design cooperatively interact; And, also to handle the scattering problem of fire retardant well for the manufacturing of fire-retardant glass fiber enhanced nylon 66 heat insulating strip, therefore, obtain industrialized composite flame-proof glass fiber enhanced nylon 66 heat insulating strip is a comparatively complicated system engineering.The production of extrusion grade flame-proof glass fibre Reinforced Nylon 66 heat insulating strips at present exists following technical problem: the glass emergence on the surface phenomenon appears in (1) easily, thereby influences material smooth finish; (2) the heat insulation section degree of compactness is difficult to reach requirement; (3) high low temperature lower sectional material mechanical property changes greatly; (4) material Extrusion Flow property and profile size change of stability are big; (5) bittern type flame-retarded dose of secondary property disaster that the toxic gas that produces when fire-retardant brings for production, application and environment; (6) the common usage quantity of without halide fire retardant is excessive, and consistency is bad, influences the whole mechanical property that glass strengthens PA66; (7) the easy deliquescing of nylon 66 suctions has a strong impact on mechanical property.Present research only is limited to laboratory rank and the product little to dimension precision requirement mostly; Strengthen in the PA66 heat insulating strip product and really be applied to produce glass, chief reason is that the difficulty that cooperatively interacts of many-sided technology such as formula for a product design, material compatibility, complete processing, die design is big.How solving the problem that production faced of other flame-retardant glass-fiber reinforced nylon 66 heat insulating strips of industriallization extrusion grade, is that pendulum is in heat insulating strip industry problem anxious to be solved in front.
Summary of the invention
The objective of the invention is to overcome the deficiency of prior art; A kind of Halogen is provided, mechanical property is superior, profile size is stable is used for composite flame retardant glass fibre reinforced nylon dragon 66 heat insulating strips of aluminum alloy doors and windows; With satisfy people different occasions and fire-retardant aspect user demand, thereby promote the popularization and the use of glass fiber reinforced nylon 66 heat insulating strips.Another object of the present invention is to provide the preparation method of above-mentioned heat insulating strip, to realize the simple and easy and large-scale production of science of composite flame-proof heat insulating strip.
The object of the invention is achieved through following technical scheme:
A kind of composite flame retardant glass fibre reinforced nylon dragon 66 heat insulating strips are made up of following component and weight part proportioning: nylon resin 100, spun glass 10～40, mineral filler 0～25, toughner 10～15, coupling agent 0.5～2, dispersed lubricant 1.2～2.0, inhibitor 0.5～1.0, photostabilizer 0.1～0.5, thermo-stabilizer 0.1～0.5, composite flame-retardant agent 15～25, Masterbatch 2～5; Said composite flame-retardant agent is the one or more combination of nitrogen system, phosphorus system, nitrogen phosphorus flame retardant: the inorganic metal compound fire retardant is 12～18: 3～8.
Nitrogen flame retardant according to the invention is the one or more combination of trimeric cyanamide, cyanogen urea acid trimeric cyanamide, urethane; Phosphorus flame retardant is inorganic phosphorus flame retardant and/or organic phosphorus flame retardant; The inorganic phosphorus flame retardant is the one or more combination of nanometer red phosphorus, phosphoric acid salt and ammonium polyphosphate, and organic phosphorus flame retardant is the one or more combination of SULPHOSUCCINIC ACID ESTER, phosphorous acid ester, phosphonic acid ester; The nitrogen phosphorus flame retardant is a polyphosphoric acid melamine; The inorganic metal compound fire retardant is the one or more combination of nano-sized magnesium hydroxide, white lake, magnesium aluminum-hydrotalcite, zinc oxide, weisspiessglanz, zinc borate.
The present invention constitutes the fire retardant compound system with the composite use of the fire retardant of different effects mechanism, and the synergy through each fire retardant has effectively improved flame retardant effect.Can select different composite flame retardant systems for use according to different request for utilizations, to make the goods of low cost, high-performance, high security.
The adding of inorganic combustion inhibitor further strengthens whole infill system, for avoiding influencing product performance, inorganic combustion inhibitor is carried out ultrafining treatment and surface treatment.The fineness of inorganic phosphorus flame retardant according to the invention and inorganic metal compound fire retardant is 1250 orders or more than 1250 orders, and carries out surface-active-treatment through coupling agent.
Mineral filler has enhancement in various degree to nylon, and mixing with glass to use to provide good product appearance, and keeps the dimensional stability of section bar to a certain extent, can require to select the kind and the actual amount of mineral filler according to Different products.Can use one or more mixtures in cenosphere, permanent white, wollastonite, calcium carbonate crystal whisker, kaolin and the mica as mineral filler, it is of a size of 800～2500 orders, and consumption is advisable with 0～15 part.
Another object of the present invention is achieved through following two kinds of technical schemes:
Method one:
The preparation method of above-mentioned composite flame retardant glass fibre reinforced nylon dragon 66 heat insulating strips may further comprise the steps:
1) with coupling agent spun glass is carried out pre-treatment;
2) nylon resin, toughner, dispersed lubricant, inhibitor, thermo-stabilizer, photostabilizer, mineral filler, composite flame-retardant agent, Masterbatch are mixed after, put in the twin screw extruder, add from the glass mouth through pretreated spun glass; The temperature in each district of twin screw extruder is controlled at 240 ℃～290 ℃, and the rotating speed of main frame is 350～600RPM, and feed rate is 30～60RPM; Through the twin screw extruder melt blending, make composite flame-proof glass fiber enhanced nylon pellet;
3) be placed on the pellet that makes in the baking oven in 90～120 ℃ of following bakings 4～6 hours;
4) putting the good pellet of baking in the single screw extrusion machine into, is 30～50RPM at screw speed, respectively to distinguish temperature be to melt extrude under 250 ℃～330 ℃ the condition; And through mould shape, pulling speed is 10～50cm/min, thereby obtains the composite flame-proof glass fiber enhanced nylon heat insulating strip of different shape.
Method two:
The preparation method of above-mentioned composite flame retardant glass fibre reinforced nylon dragon 66 heat insulating strips may further comprise the steps:
1) with coupling agent spun glass is carried out pre-treatment.
2) with nylon resin, toughner, inhibitor, thermo-stabilizer, photostabilizer, mineral filler, Masterbatch, mix through pretreated spun glass after; Through the twin screw extruder melt blending; The temperature in each district of twin screw extruder is controlled at 240 ℃～290 ℃; The rotating speed of main frame is 300～450RPM, and feed rate is 30～60RPM, thereby makes the glass fiber enhanced nylon pellet;
3) in the pellet that makes, add composite flame-retardant agent, mixed again cross twin screw extruder after, be placed in the baking oven in 90～120 ℃ of bakings 4～6 hours down;
4) in the good pellet of baking, add dispersed lubricant, after mixing, through single screw extrusion machine be 30～50RPM at screw speed, respectively to distinguish temperature be to melt extrude under 250 ℃～340 ℃ the condition; And through mould shape, pulling speed is 10～50cm/min, thereby obtains the composite flame-proof glass fiber enhanced nylon heat insulating strip of different shape.
The present invention has following beneficial effect:
1, the invention solves that prior art halide-containing flame retardant products produces thick smoke when fire-retardant, the problem of toxicity and corrosive gases, reduced the secondary property disaster of being brought for production, application and environment thus.
2, the selection through compositing formula is used, and ins conjunction with the preparation method, has solved that fire retardant and filler are difficult to disperse, compatible problem in the nylon course of processing, has obtained good flame-retardant effect, and is satisfied and enlarged the demand in client and market.
3, overcome the problem that prior art without halide fire retardant usage quantity is excessive, consistency is bad, avoided because the use of fire retardant strengthens the influence that the whole mechanical property of PA66 is brought to glass.
4, mechanical property is excellent, surface smoothing, highly polished, and water-intake rate is low, and dimensional stability is high, and is not yielding.
5, use temperature is high, and coefficient of linear expansion and aluminium section bar are close.Weathering resistance, corrosion-resistant, ageing-resistant performance good.
Embodiment
To combine embodiment that the present invention is made further detailed description below.
The relative viscosity of embodiment of the invention nylon resin is 2.0～5.0Pa.s.Spun glass is an alkali-free glass fiber, can be roving glass fiber or short glass fiber.Toughner is the grafting elastomerics, can be the graft copolymer of Vilaterm (PE), Vestolen PP 7052 (PP), terpolymer EP rubber (EPDM), ethylene-octene copolymer (POE) and maleic anhydride (MA) etc.Coupling agent can be one or more mixtures of silane coupling agent, titanate coupling agent etc.Dispersed lubricant is one or more mixtures of fatty acid acyl amine, fatty acid ester, metallic soap class, paraffin class, organo-siloxane class etc.Inhibitor is one or more mixtures of monothioester class, phosphorous acid esters, Hinered phenols, phenols etc.Photostabilizer is one or more mixtures of hindered amines, benzotriazole category, benzophenone etc.Thermo-stabilizer is one or more mixtures of organic tin, metallic soap class, rare-earth stabilizer etc.
Embodiment one:
The component and the weight part proportioning of composite flame retardant glass fibre reinforced nylon dragon heat insulating strip that present embodiment is used for aluminum alloy doors and windows is following:
Nylon 66: relative viscosity 2.5Pa.s, 100 parts
Spun glass: the roving glass fiber of alkali-free, 40 parts
Toughner: 12 parts of ethylene-octene-copolymer-maleic anhydrides
Coupling agent: 0.6 part of γ-glycidoxypropyltrime,hoxysilane
2 parts of dispersed lubricant: TAF (the ethylene bis-fatty acid of polar functionalities)
Inhibitor: N, N ' is two-0.6 part of (3-(3,5-di-t-butyl-4-hydroxyl) propionyl group) hexanediamine
Photostabilizer: 0.5 part of two (2,2,6,6-tetramethyl--4-piperidyl) sebate
Thermo-stabilizer: 0.5 part of dibutyl tin laurate
Composite flame-retardant agent: 13 parts of ammonium polyphosphates, 6 parts of magnesium aluminum-hydrotalcites
Masterbatch: 3 parts of black looks female
Present embodiment is used for the preparation method of the composite flame retardant glass fibre reinforced nylon dragon heat insulating strip of aluminum alloy doors and windows, and its step is following:
1) with coupling agent spun glass is carried out pre-treatment;
2) above-mentioned Nylon 66, toughner, dispersed lubricant, inhibitor, photostabilizer, thermo-stabilizer, composite flame-retardant agent, black Masterbatch are mixed after, put in the twin screw extruder; Add from the glass mouth through pretreated spun glass; The temperature in each district of twin screw extruder is controlled at 240 ℃, 255 ℃, 260 ℃, 265 ℃, 265 ℃, 255 ℃, 245 ℃, 260 ℃, and the rotating speed of main frame is 350～450RPM, and feed rate is 30～45RPM; Through the twin screw extruder melt blending, make glass fiber enhanced nylon 66 black pellet;
3) be placed on the pellet that makes in the baking oven in 90～120 ℃ of following bakings 4 hours;
4) put the good pellet of baking in the single screw extrusion machine into; Be 30～50RPM at screw speed, respectively to distinguish temperature be to melt extrude through mould shape under 260 ℃, 265 ℃, 275 ℃, 280 ℃, 290 ℃, 290 ℃, 300 ℃, 330 ℃ the condition; Pulling speed is 10～50cm/min, thereby obtains the composite flame-proof glass fiber enhanced nylon 66 heat insulating strip of stable different shape.
Embodiment two:
The component of present embodiment composite flame-proof heat insulating strip and weight part proportioning are with embodiment one difference:
Spun glass: the short glass fiber of alkali-free, glass length are 30 parts of 2～5 μ m
Mineral filler: 10 parts of cenospheres
Dispersed lubricant: 1.0 parts of 0.5 part of two ethylene acid amides and erucicamides
Inhibitor: 0.2 part of tricresyl phosphite (2, the 4-di-tert-butyl-phenyl) ester and 0.4 part of four [β-(3 ', 5 '-di-t-butyl-4 '-hydroxy phenyl) propionic acid] pentaerythritol ester
Composite flame-retardant agent: 15 parts of cyanogen urea acid trimeric cyanamides, 7 parts of nano-sized magnesium hydroxides
The preparation method of present embodiment composite flame-proof heat insulating strip, its step is following:
1) with silane coupling agent the alkali-free short glass fiber is carried out pre-treatment.
2) with above-mentioned Nylon 66, toughner, oxygenant, thermo-stabilizer, photostabilizer, mineral filler, after pretreated alkali-free short glass fiber mixes; Through the twin screw extruder melt blending; The temperature in each district of twin screw extruder is controlled at 250 ℃, 270 ℃, 265 ℃, 265 ℃, 250 ℃, 260 ℃, 260 ℃, 265 ℃; The rotating speed of main frame is 300～450RPM, and feed rate is 30～60RPM, thereby makes the glass fiber enhanced nylon 66 pellet;
3) in the pellet that makes, add composite flame-retardant agent, mix and cross again twin screw extruder after, be placed in the baking oven in 90～120 ℃ of bakings 4～6 hours down;
4) in the good pellet of baking, add dispersed lubricant; After mixing, through single screw extrusion machine be 30～50RPM at screw speed, respectively to distinguish temperature be to melt extrude under 245 ℃, 265 ℃, 265 ℃, 270 ℃, 270 ℃, 255 ℃, 255 ℃, 265 ℃ the condition; And through mould shape, pulling speed is 10～50cm/min, thereby obtains the composite flame-proof glass fiber enhanced nylon 66 heat insulating strip of different shape.
Embodiment three:
The component of present embodiment composite flame-proof heat insulating strip and weight part proportioning are with embodiment one difference:
The consumption of toughner is 10 parts
Inhibitor: 0.2 part of tricresyl phosphite (2, the 4-di-tert-butyl-phenyl) ester and 0.4 part of four [β-(3 ', 5 '-di-t-butyl-4 '-hydroxy phenyl) propionic acid] pentaerythritol ester
Composite flame-retardant agent: 15 parts of urethane, 7 parts of nano-sized magnesium hydroxides
The preparation method of present embodiment composite flame-proof heat insulating strip is with embodiment one difference: respectively distinguishing temperature during granulation all increases by 3～5 ℃, and the rotating speed of main frame will be accelerated relatively, is 450～600RPM; Pulling speed during forming materials is reduced a little, is 10～50cm/min.
Embodiment four:
The component of present embodiment composite flame-proof heat insulating strip and weight part proportioning are with embodiment two differences
With 40 parts of alkali-free short glass fibers is the enhancing system, and glass length is 2～5 μ m, does not add mineral filler
Dispersed lubricant: 0.8 part of two ethylene acid amides and 0.5 part of erucicamide
Composite flame-retardant agent: 10 parts of cyanogen urea acid trimeric cyanamides, 7 parts of SULPHOSUCCINIC ACID ESTERs, 6 parts of nano-sized magnesium hydroxides
The preparation method of present embodiment composite flame-proof heat insulating strip is with embodiment two differences: the feed rate during granulation is accelerated as far as possible, is 45～60RPM, and preceding 4 district's temperature respectively increase by 5 ℃.
Embodiment five
The component of present embodiment composite flame-proof heat insulating strip and weight part proportioning are with embodiment one difference:
Spun glass: 25 parts of the roving glass fibers of alkali-free
Mineral filler: 15 parts of calcium carbonate crystal whiskers
The consumption of toughner is 10 parts
Inhibitor: 0.2 part of tricresyl phosphite (2, the 4-di-tert-butyl-phenyl) ester and 0.4 part of four [β-(3 ', 5 '-di-t-butyl-4 '-hydroxy phenyl) propionic acid] pentaerythritol ester
0.2 part of photostabilizer: 2-(2 '-hydroxyl-the 3 '-tertiary butyl-5 '-aminomethyl phenyl)-5-chlorinated benzotriazole
Thermo-stabilizer: 0.2 part of barium stearate
Composite flame-retardant agent: 13 parts of polyphosphoric acid melamines, 6 parts of zinc borates
The preparation method of present embodiment composite flame-proof heat insulating strip is identical with embodiment one.
Embodiment six
The component of present embodiment composite flame-proof heat insulating strip and weight part proportioning are with embodiment two differences:
The consumption of spun glass is 30 parts
Mineral filler: 10 parts of calcium carbonate crystal whiskers
The consumption of toughner is 10 parts
Thermo-stabilizer: 0.2 part rare-earth stabilizer
Photostabilizer is: 0.1 part of 2-(2 '-hydroxyl-the 3 '-tertiary butyl-5 '-aminomethyl phenyl)-5-chlorinated benzotriazole and 0.1 part of UV-531
Composite flame-retardant agent: 18 parts of phosphonic acid esters, 6 parts of nano-sized magnesium hydroxides
The preparation method of present embodiment composite flame-proof heat insulating strip, be with embodiment two differences: the feed rate during granulation slows down a little, is 30～50RPM.
Embodiment seven
The component of present embodiment composite flame-proof heat insulating strip and weight part proportioning are with embodiment six differences:
Mineral filler: 8 parts of cenospheres
Dispersed lubricant: 0.8 part of two ethylene acid amides and 0.5 part of erucicamide
Composite flame-retardant agent: 10 parts of cyanogen urea acid trimeric cyanamides, 5 parts in nanometer red phosphorus, 4 parts of magnesium aluminum-hydrotalcites
The preparation method of present embodiment composite flame-proof heat insulating strip is with embodiment six.
Embodiment eight
The component of present embodiment composite flame-proof heat insulating strip and weight part proportioning are with embodiment one difference:
Mineral filler: 20 parts of cenospheres
The consumption of spun glass is 10 parts
The toughner consumption is 14 parts
Composite flame-retardant agent: 13 parts of urethane, 5 parts in nanometer red phosphorus
The preparation method of present embodiment composite flame-proof heat insulating strip is with embodiment one difference: rate of feeding is accelerated during granulation, is 45～60RPM.
Comparative Examples one
The component of this Comparative Examples heat insulating strip and weight part proportioning are with embodiment one difference:
The spun glass that adopts 40 weight parts does not add mineral filler as the enhancing system
The consumption of coupling agent is 0.6 part
The consumption of toughner is 12 parts
The consumption of dispersed lubricant is 1.5 parts
Each 0.2 part of photostabilizer and thermo-stabilizer
Do not add fire retardant
The preparation method of present embodiment heat insulating strip is identical with embodiment one.
Comparative Examples two
The component of present embodiment composite flame-proof heat insulating strip and weight part proportioning are with embodiment one difference:
Mineral filler: 15 parts of calcium carbonate crystal whiskers
The consumption of toughner is 10 parts
Inhibitor: 0.2 part of tricresyl phosphite (2, the 4-di-tert-butyl-phenyl) ester and 0.4 part of four [β-(3 ', 5 '-di-t-butyl-4 '-hydroxy phenyl) propionic acid] pentaerythritol ester
0.2 part of photostabilizer: 2-(2 '-hydroxyl-the 3 '-tertiary butyl-5 '-aminomethyl phenyl)-5-chlorinated benzotriazole
Thermo-stabilizer: 0.2 part of barium stearate
Single component fire retardant: 18 parts of zinc borates
The preparation method of present embodiment composite flame-proof heat insulating strip, be with embodiment one difference: drying time is 6 hours.
Comparative Examples three
The component of present embodiment composite flame-proof heat insulating strip and weight part proportioning are with embodiment two differences
With 33 parts of alkali-free short glass fibers is the enhancing system, and glass length is 2～5 μ m.
Dispersed lubricant: 0.8 part of two ethylene acid amides and 0.5 part of erucicamide;
Single component fire retardant: 18 parts in zinc oxide.
The preparation method of present embodiment heat insulating strip is with embodiment two differences: the feed rate during granulation is accelerated as far as possible, is 70～80RPM, and preceding 4 district's temperature respectively increase by 5 ℃.
Comparative Examples four
The component of present embodiment composite flame-proof heat insulating strip and weight part proportioning are with embodiment one difference:
Mineral filler: 20 parts of cenospheres
The consumption of spun glass is 10 parts
The toughner consumption is 14 parts;
Single-component fire retardant: 18 parts of urethane
The preparation method of present embodiment composite flame-proof heat insulating strip is with embodiment one difference: rate of feeding is accelerated during granulation, is 45～60RPM.
The component proportioning of composite flame-proof heat insulating strip product of the present invention and each processing parameter among the preparation method are not limited to above-mentioned listed examples.
The product performance index of above-mentioned each embodiment and Comparative Examples is as shown in table 1.
Table 1 various embodiments of the present invention and Comparative Examples product performance index
| Sequence number | Unnotched impact strength KJ/m 2 | Transverse tensile strength MPa | Elongation at break % | Heat-drawn wire/℃ | Young's modulus Mpa | Flame retardant rating | Outward appearance |
| Embodiment 1 | 38.5 | 131.3 | 4.6 | 255.6 | 7830 | V-0 | The shiny black no glass emergence on the surface phenomenon in surface |
| Embodiment 2 | 41.4 | 132.3 | 5.0 | 256.7 | 7827 | V-0 | The same |
| Embodiment 3 | 39.8 | 127.5 | 5.2 | 248.0 | 7705 | V-0 | The more shiny black no glass emergence on the surface phenomenon in surface has a small amount of decorative pattern |
| Embodiment 4 | 38.4 | 121.2 | 5.1 | 241.7 | 6968 | V-0 | The more shiny black no glass emergence on the surface phenomenon in surface |
| Embodiment 5 | 36.7 | 115.7 | 5.2 | 230.1 | 6421 | V-0 | The shiny black no glass emergence on the surface phenomenon in surface |
| Embodiment 6 | 35.9 | 111.9 | 5.5 | 236.2 | 6842 | V-0 | The same |
| Embodiment 7 | 36.5 | 114.5 | 5.4 | 237.1 | 6597 | V-0 | The shiny black no glass emergence on the surface phenomenon in surface |
| Embodiment 8 | 32.9 | 104.6 | 4.4 | 220.1 | 5960 | V-0 | Smooth surface has minute quantity |
| Comparative Examples 1 | 30.1 | 92.2 | 3.7 | 212.6 | 4874 | HB | Smooth surface has a small amount of decorative pattern |
| Comparative Examples 2 | 35.2 | 99.3 | 4.8 | 225.7 | 5231 | V-1 | Smooth surface has a small amount of white point |
| Comparative Examples 3 | 36.0 | 97.9 | 4.6 | 220.4 | 5248 | V-1 | Smooth surface has a small amount of water wave |
| Comparative Examples 4 | 35.6 | 101.8 | 5.0 | 230.2 | 5756 | V-1 | Smooth surface has a small amount of white point |
The result shows, adopts the heat insulating strip of composite flame-retardant agent system, and flame retardant rating all can reach the V-0 level; And the flame retardant rating of single-component fire retardant reaches the V-1 level basically, and effect is general; The flame retardant rating that does not add any fire retardant then is the HB level.The adding of fire retardant; Particularly the adding of inorganic combustion inhibitor has increased the requirement of system dispersiveness and consistency; Through the adjustment on the prescription and the ultrafining treatment of fire retardant; Effectively reduce flame-retardant system to effect of material performance, when guaranteeing mechanical property, given the material good flame retardancy.
Claims (6)
1. composite flame retardant glass fibre reinforced nylon dragon 66 heat insulating strips is characterized in that being made up of following component and weight part proportioning: nylon resin 100, spun glass 10～40, mineral filler 0～25, toughner 10～15, coupling agent 0.5～2, dispersed lubricant 1.2～2.0, inhibitor 0.5～1.0, photostabilizer 0.1～0.5, thermo-stabilizer 0.1～0.5, composite flame-retardant agent 15～25, Masterbatch 2～5; Said composite flame-retardant agent is the one or more combination of nitrogen system, phosphorus system, nitrogen phosphorus flame retardant: the inorganic metal compound fire retardant is 12～18: 3～8, and wherein said inorganic metal compound fire retardant is nano-sized magnesium hydroxide or magnesium aluminum-hydrotalcite.
2. according to claim 1 composite flame retardant glass fibre reinforced nylon dragon 66 heat insulating strips, it is characterized in that: said nitrogen flame retardant is the one or more combination of trimeric cyanamide, cyanogen urea acid trimeric cyanamide, urethane; Phosphorus flame retardant is inorganic phosphorus flame retardant and/or organic phosphorus flame retardant; The inorganic phosphorus flame retardant is the one or more combination of nanometer red phosphorus, phosphoric acid salt and ammonium polyphosphate, and organic phosphorus flame retardant is the one or more combination of SULPHOSUCCINIC ACID ESTER, phosphorous acid ester, phosphonic acid ester; The nitrogen phosphorus flame retardant is a polyphosphoric acid melamine.
3. according to claim 1 or 2 composite flame retardant glass fibre reinforced nylons dragon, 66 heat insulating strips, it is characterized in that: the fineness of said inorganic phosphorus flame retardant and inorganic metal compound fire retardant is more than 1250 orders, carries out surface-active-treatment through coupling agent.
4. according to claim 1 composite flame retardant glass fibre reinforced nylon dragon 66 heat insulating strips, it is characterized in that: the consumption of said mineral filler is 0～15 part.
5. the preparation method of claim 1 composite flame retardant glass fibre reinforced nylon dragon 66 heat insulating strips is characterized in that may further comprise the steps:
1) with coupling agent spun glass is carried out pre-treatment;
2) nylon resin, toughner, dispersed lubricant, inhibitor, thermo-stabilizer, photostabilizer, mineral filler, composite flame-retardant agent, Masterbatch are mixed after, put in the twin screw extruder, add from the glass mouth through pretreated spun glass; The temperature in each district of twin screw extruder is controlled at 240 ℃～290 ℃, and the rotating speed of main frame is 350～600RPM, and feed rate is 30～60RPM; Through the twin screw extruder melt blending, make composite flame-proof glass fiber enhanced nylon pellet;
3) be placed on the pellet that makes in the baking oven in 90～120 ℃ of following bakings 4～6 hours;
4) putting the good pellet of baking in the single screw extrusion machine into, is 30～50RPM at screw speed, respectively to distinguish temperature be to melt extrude under 250 ℃～330 ℃ the condition; And through mould shape, pulling speed is 10～50cm/min, thereby obtains the composite flame-proof glass fiber enhanced nylon heat insulating strip of different shape.
6. the preparation method of claim 1 composite flame retardant glass fibre reinforced nylon dragon 66 heat insulating strips is characterized in that may further comprise the steps:
1) with coupling agent spun glass is carried out pre-treatment;
2) with nylon resin, toughner, inhibitor, thermo-stabilizer, photostabilizer, mineral filler, Masterbatch, mix through pretreated spun glass after; Through the twin screw extruder melt blending; The temperature in each district of twin screw extruder is controlled at 240 ℃～290 ℃; The rotating speed of main frame is 300～450RPM, and feed rate is 30～60RPM, thereby makes the glass fiber enhanced nylon pellet;
3) in the pellet that makes, add composite flame-retardant agent, mixed again cross twin screw extruder after, be placed in the baking oven in 90～120 ℃ of bakings 4～6 hours down;
4) in the good pellet of baking, add dispersed lubricant, after mixing, through single screw extrusion machine be 30～50RPM at screw speed, respectively to distinguish temperature be to melt extrude under 250 ℃～340 ℃ the condition; And through mould shape, pulling speed is 10～50cm/min, thereby obtains the composite flame-proof glass fiber enhanced nylon heat insulating strip of different shape.
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| CN2010101117118A CN101798460B (en) | 2010-02-08 | 2010-02-08 | Composite flame retardant glass fibre reinforced nylon 66 insulating strip and preparation method thereof |
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| CN2010101117118A CN101798460B (en) | 2010-02-08 | 2010-02-08 | Composite flame retardant glass fibre reinforced nylon 66 insulating strip and preparation method thereof |
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| CN101798460B true CN101798460B (en) | 2012-02-29 |
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