CN102604212B - Aramid fiber pulp-enhanced expansion flame retardant polypropylene composite material and preparation method thereof - Google Patents
Aramid fiber pulp-enhanced expansion flame retardant polypropylene composite material and preparation method thereof Download PDFInfo
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- CN102604212B CN102604212B CN201210047436.7A CN201210047436A CN102604212B CN 102604212 B CN102604212 B CN 102604212B CN 201210047436 A CN201210047436 A CN 201210047436A CN 102604212 B CN102604212 B CN 102604212B
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- 239000004743 Polypropylene Substances 0.000 title claims abstract description 70
- 229920001155 polypropylene Polymers 0.000 title claims abstract description 70
- -1 polypropylene Polymers 0.000 title claims abstract description 69
- 239000003063 flame retardant Substances 0.000 title claims abstract description 62
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 title claims abstract description 55
- 239000002131 composite material Substances 0.000 title claims abstract description 23
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- 229920006231 aramid fiber Polymers 0.000 title abstract description 7
- 239000011159 matrix material Substances 0.000 claims abstract description 32
- 239000004760 aramid Substances 0.000 claims description 36
- 229920003235 aromatic polyamide Polymers 0.000 claims description 36
- 238000003756 stirring Methods 0.000 claims description 13
- 238000002156 mixing Methods 0.000 claims description 12
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 11
- 239000012757 flame retardant agent Substances 0.000 claims description 11
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical class O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 claims description 10
- 239000003960 organic solvent Substances 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 8
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 7
- 229910052760 oxygen Inorganic materials 0.000 claims description 7
- 239000001301 oxygen Substances 0.000 claims description 7
- YLQBMQCUIZJEEH-UHFFFAOYSA-N Furan Chemical compound C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 claims description 6
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical group OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 6
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 claims description 6
- 238000001125 extrusion Methods 0.000 claims description 6
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 claims description 5
- 238000000967 suction filtration Methods 0.000 claims description 5
- 238000005469 granulation Methods 0.000 claims description 4
- 230000003179 granulation Effects 0.000 claims description 4
- 238000002844 melting Methods 0.000 claims description 4
- 230000008018 melting Effects 0.000 claims description 4
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 3
- 229910052698 phosphorus Inorganic materials 0.000 claims description 3
- 239000011574 phosphorus Substances 0.000 claims description 3
- WYTZZXDRDKSJID-UHFFFAOYSA-N (3-aminopropyl)triethoxysilane Chemical compound CCO[Si](OCC)(OCC)CCCN WYTZZXDRDKSJID-UHFFFAOYSA-N 0.000 claims description 2
- 239000004593 Epoxy Substances 0.000 claims description 2
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 claims description 2
- 239000000835 fiber Substances 0.000 abstract description 7
- 239000011347 resin Substances 0.000 abstract description 6
- 229920005989 resin Polymers 0.000 abstract description 6
- 239000004033 plastic Substances 0.000 abstract description 5
- 229920003023 plastic Polymers 0.000 abstract description 5
- 230000009471 action Effects 0.000 abstract description 3
- 229920000642 polymer Polymers 0.000 abstract description 2
- DXZMANYCMVCPIM-UHFFFAOYSA-L zinc;diethylphosphinate Chemical compound [Zn+2].CCP([O-])(=O)CC.CCP([O-])(=O)CC DXZMANYCMVCPIM-UHFFFAOYSA-L 0.000 abstract 1
- 239000000463 material Substances 0.000 description 15
- 239000003610 charcoal Substances 0.000 description 6
- 239000002253 acid Substances 0.000 description 5
- 239000007789 gas Substances 0.000 description 5
- 239000003365 glass fiber Substances 0.000 description 5
- 239000004114 Ammonium polyphosphate Substances 0.000 description 4
- 235000019826 ammonium polyphosphate Nutrition 0.000 description 4
- 229920001276 ammonium polyphosphate Polymers 0.000 description 4
- 230000002708 enhancing effect Effects 0.000 description 4
- 238000011056 performance test Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 235000019504 cigarettes Nutrition 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 229960000935 dehydrated alcohol Drugs 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 231100000252 nontoxic Toxicity 0.000 description 2
- 230000003000 nontoxic effect Effects 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000009941 weaving Methods 0.000 description 2
- 241000239290 Araneae Species 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 101100136092 Drosophila melanogaster peng gene Proteins 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 238000010000 carbonizing Methods 0.000 description 1
- 206010061592 cardiac fibrillation Diseases 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000032050 esterification Effects 0.000 description 1
- 238000005886 esterification reaction Methods 0.000 description 1
- 239000011152 fibreglass Substances 0.000 description 1
- 230000002600 fibrillogenic effect Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229920005862 polyol Polymers 0.000 description 1
- 238000007781 pre-processing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 229910000077 silane Inorganic materials 0.000 description 1
- 239000002341 toxic gas Substances 0.000 description 1
- 150000003918 triazines Chemical class 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/04—Particle-shaped
Abstract
The invention relates to a preparation method of a polymer composite material, particularly to a preparation method of an aramid fiber pulp-enhanced expansion flame retardant polypropylene composite material. According to the invention, aramid fiber pulp-enhanced expansion flame retardant polypropylene with high strength is utilized, the composite action of aramid fiber pulp-enhanced expansion flame retardant polypropylene is relied on, the high strength and bearing stress of fiber is utilized to bear stress, and the plastic flowage of matrix resin and the bonding property and of the matrix resin with resin are utilized to transfer stress, so that a halogen-free flame retardant light-weighted polypropylene composite material is provided.
Description
Technical field
The present invention relates to a kind of preparation method of polymer composite, particularly a kind of aramid pulp strengthens the preparation method of expanded flame-retardant polypropylene matrix material.
Background technology
Polypropylene (PP) has the features such as good mechanical property, processing characteristics, chemical resistance, electrical insulating property and nontoxic lightweight, be a kind of general-purpose plastics of high comprehensive performance, be widely used in the fields such as household electrical appliances, electronics, material of construction, automotive industry, weaving, decoration; Due to polypropylene easy firing, if its oxygen index is only 17-18, during burning, can produce a large amount of molten drops, if insufficient meeting of burning discharges the toxic gases such as such as CO, fire hazard is larger etc., has limited its use range; Along with polypropylene has certain requirements field as the widespread use of building, automotive industry at some to product flame retardant properties, therefore guaranteeing that Mechanical Properties of PP reaches that under the prerequisite of goods requirement, how to improve polyacrylic flame retardant properties be a very important problem.
Expansion type flame retardant (IFR) is considered to have most a kind of environment friendly flame retardant of development potentiality, generally acid source, source of the gas, charcoal source three parts, consists of.Ammonium polyphosphate (APP) is the most frequently used acid source and source of the gas, and Pentaerythritols polyol is the most frequently used charcoal source; The fire retardant mechanism of IFR is to be heated to that certain temperature acid source discharges mineral acid and polyvalent alcohol esterification is dehydrated into charcoal, under the effect of the rare gas element that the carbonizing production of thickness discharges at source of the gas, expand, form the charcoal layer of Peng Song, that this charcoal layer has is heat insulation, oxygen barrier, press down the effects such as cigarette, anti-molten drop; Chinese patent CN102134352A discloses and has adopted the expansion type flame retardant being re-dubbed by ammonium polyphosphate (APP) and novel triazines char-forming agent, 30% expansion type flame retardant is added to the flame retardant properties that can improve widely material in polypropylene, this matrix material has nontoxic simultaneously, low cigarette, the advantages such as environmental protection, but mechanical property also can significantly decline simultaneously.
Adopting filler to strengthen expanded flame-retardant polypropylene is the emphasis of studying at present, Hao Dongmei is in the document (research of halogen-free expansion fire retardant ANTI-610 fire retardant fiber glass reinforced polypropylene, the fire-retardant Annual Conference collection of thesis in the whole nation, 2008,74-77), reported that short glass fiber strengthens expanded flame-retardant polypropylene matrix material, but adopt short glass fiber enhancing can make the density of material increase, impact strength decreased; Aramid pulp (PPTA-pulp) is the fibrillation product of aramid fiber, and surface is lint shape fiber grows thickly, and filoplume is abundant, and coarse, fibre axis caudad fibril changes into needle-like, and these fibrils are along the axial well-regulated orientations of pulp; Aramid fiber is mechanical properties excellence not only, and can melting, and exceed 570 ℃ and just progressively decompose carbonization, life-time service at 180 ℃, strength and modulus can not change; The compare remarkable advantage of carbon fiber and glass fibre of PPTA-pulp is that PPTA-pulp has good toughness, no matter therefore can not reduce its length-to-diameter ratio how in fierce hybrid process process, density is less simultaneously; Li Jinchun is in document (structure of aramid pulp reinforced polypropylene composite material and performance, Journal of Chemical Industry and Engineering, 2007,12 (58): 3192-3196) in, reported that employing aramid pulp carries out enhancing modified to polypropylene, compared with the matrix material that this class matrix material strengthens with glass, there is the features such as light weight, therefore be applied to automotive industry, material of construction, the fields such as weaving, how to improve the flame retardant properties of this class matrix material and shown great attention to, with aramid pulp, strengthen expanded flame-retardant polypropylene matrix material and there is not yet relevant report.
Summary of the invention
The object of the invention is to utilize and there is high-intensity aramid pulp enhancing expanded flame-retardant polypropylene, rely on its compound action, utilize the high strength of fiber to meet with stresses, utilize the plastic flow of matrix resin and with the cohesiveness of fiber so that stress, the halogen-free flameproof lightweight polypropylene composite material that provides a kind of flame retardant properties and mechanical property all can reach product requirement to be provided.
A kind of aramid pulp of the present invention strengthens expanded flame-retardant polypropylene matrix material, its component take listed as parts by weight as:
100 parts of polypropylene;
25 ~ 30 parts of expansion type flame retardants;
1 ~ 10 part of aramid pulp;
5 ~ 10 parts of polypropylene grafted maleic anhydrides;
1 ~ 2 part of silane coupling agent.
Polypropylene used in the present invention is homopolymerization or Co-polypropylene, and melting index is 2.5 ~ 8.5g/10min.
Expansion type flame retardant used in the present invention is the EPFR-100D of general plug furan (Qingyuan City) phosphorus chemistry company limited, it is applied to polyacrylic extrusion and does not have neatly situation, this fire retardant is containing acid source, source of the gas, carbon source, to become charcoal, mechanism of intumescence to play fire retardation.
The density of aramid pulp used in the present invention is 1.03-1.04g/cm
3.
Its percentage of grafting of polypropylene grafted maleic anhydride used in the present invention is 1%.
Silane coupling agent used in the present invention is selected from the one in γ-aminopropyl triethoxysilane, γ-(2,3-epoxy the third oxygen) propyl trimethoxy silicane, γ-(methacryloxypropyl) propyl trimethoxy silicane.
Organic solvent used in the present invention is dehydrated alcohol, methyl alcohol or toluene.
The preparation method that a kind of aramid pulp of the present invention strengthens expanded flame-retardant polypropylene matrix material is:
(1) by aramid pulp, expansion type flame retardant joins in organic solvent, after stirring, adds silane coupling agent to stir, and after suction filtration, air blast is dried and obtained composite flame-retardant agent; In every 300mL organic solvent, add the aramid pulp of 1 ~ 10g, expansion type flame retardant and the 1 ~ 2g silane coupling agent of 25 ~ 30g;
(2) by polypropylene, composite flame-retardant agent, polypropylene grafted maleic anhydride, after mixing at 180 ℃ ~ 200 ℃ of Banbury mixeies, under 50 ~ 200 revs/min of rotating speeds melt blending after 5 ~ 10 minutes, take out obtain aramid pulp strengthen expanded flame-retardant polypropylene matrix material or in parallel equidirectional two-screw forcing machine blending extrusion granulation obtain matrix material, 170 ~ 180 ℃, its expressing technique Wei Yi district, two 180 ~ 200 ℃, districts, three 190 ~ 210 ℃, districts, four 190 ~ 200 ℃, districts, screw speed 200 ~ 300 r/min, feeding frequency 18 ~ 25 Hz.
Described a kind of aramid pulp strengthens the preparation method of expanded flame-retardant polypropylene matrix material, it is characterized in that: in step (1) by aramid pulp, expansion type flame retardant joins in organic solvent, stirring rake stirs 3 hours with 600r/min rotating speed, add silane coupling agent to stir 10 minutes, after suction filtration, 80 ℃ of air blast are dried and within 3 hours, are obtained composite flame-retardant agent.
The aramid pulp that the present invention makes strengthens expanded flame-retardant polypropylene matrix material, can make polyacrylic oxygen index bring up to 28% (volume percent) from 18% (volume percent), tensile strength reaches 30.38MPa simultaneously, and shock strength reaches 56.94 J/m; And do not add PPTA-pulp, and only use 30 parts of expansion type flame retardant filled polypropylenes, although matrix material oxygen index reaches 35 tensile strengths, be only 23.09MPa, shock strength is 45.75 J/m.
High-intensity aramid pulp strengthens expanded flame-retardant polypropylene, rely on its compound action, utilize the high strength of fiber to meet with stresses, utilize the plastic flow of matrix resin and with the cohesiveness of fiber to transmit stress, provide a kind of flame retardant properties and mechanical property all can reach the halogen-free anti-flaming polypropylene material of product requirement; Compared with adding merely expansion type flame retardant, it is better that the present invention has mechanical property, flame retardant properties declines slightly, compared with short glass fiber reinforced polypropylene compound material, this matrix material light weight, and mechanical property and flame retardant properties can reach product requirement, can be used for material of construction, automotive industry, these have the field of requirement for product flame retardant properties.
Embodiment
Embodiment is below to further illustrate of the present invention, rather than limits the scope of the invention.
The polypropylene that following examples adopt is the J540 that raises sub-petrochemical industry, melting index 3.8g/10min; Polypropylene grafted maleic anhydride is the CMG9801 of the liter of Shanghai day, and percentage of grafting is 1%; The EPFR-100D that expansion type flame retardant produces for general plug furan (Qingyuan City) phosphorus chemistry company limited; Aramid pulp is the DFP-103 of Shanghai Lanbang Industry Fibre Co., Ltd. " golden spider "; Silane coupling agent is the KH-550 of Nanjing Jing Tianwei Chemical Co., Ltd.; Organic solvent is the dehydrated alcohol of Chemical Reagent Co., Ltd., Sinopharm Group, and Banbury mixer used is Haake Rheomix Banbury mixer; The twin screw extruder using is the SHJ-35 equidirectional parallel double-screw extruder of Nanjing Guang Da rubber and plastics machine factory, length-to-diameter ratio 40/1.
Embodiment 1-5:
(1) according to the formula of table 1, by aramid pulp and expansion type flame retardant take dehydrated alcohol as organic solvent, stirring rake stirs 3 hours with 600r/min rotating speed, adds silane resin acceptor kh-550 to stir 10 minutes, and after suction filtration, 80 ℃ of air blast are dried and within 3 hours, obtained composite flame-retardant agent.
(2) according to the formula of table 1, after polypropylene, composite flame-retardant agent, polypropylene grafted maleic anhydride are mixed in Banbury mixer 190
ounder C, 100r/min, melt blending 10 minutes, obtains aramid pulp and strengthens expanded flame-retardant polypropylene matrix material, and resulting materials the performance test results is in Table 2.
Embodiment 6:
The treating processes of composite flame-retardant agent is with embodiment 1-5.
According to the formula of table 1, after being mixed, polypropylene, composite flame-retardant agent, polypropylene grafted maleic anhydride add blending extrusion granulation in parallel equidirectional two-screw forcing machine to obtain anti-flaming polypropylene material mixture, 180 ℃, its expressing technique Wei Yi district, two 190 ℃, districts, three 200 ℃, districts, four 195 ℃, districts, screw speed 260 r/min, feeding frequency 20 Hz, the performance test results of resulting materials is shown in Table 2.
Comparative example 1:
Only adopt expansion type flame retardant to prepare anti-flaming polypropylene material.
After each component being mixed according to the formula of table 1, in Banbury mixer in 190
oc, 100r/min, melt blending discharging after 6 minutes, obtains anti-flaming polypropylene material, and the performance test results of resulting materials is shown in Table 2.
Comparative example 2:
Only adopt aramid pulp to prepare Reinforced Polypropylene material.
The preprocessing process of aramid pulp, with embodiment 1-5, does not just add expansion type flame retardant.
After each component being mixed according to the formula of table 1, in Banbury mixer in 190
oc, 100r/min, melt blending discharging after 10 minutes, obtains aramid pulp reinforced polypropylene composite material, and the performance test results of resulting materials is shown in Table 2.
Data from table 2 can be found out, along with the continuous increase of aramid pulp content, the oxygen index of matrix material constantly reduces, mechanical property first increases rear minimizing, when pulp content is polypropylene weight 5%, when IFR content is polypropylene weight 30%, mechanical property the best of material, now flame retardant properties declines slightly, can reach the requirement of product; The density that contains in addition the matrix material of 5% pulp enhancing expanded flame-retardant polypropylene is 1.04 g/cm
3, but the density of 30% short glass fiber Reinforced Polypropylene is 1.6 g/cm
3, the composite material light that obviously aramid fiber strengthens; Embodiment 2 and embodiment 6 contrasts by same formula different processing methods are visible, and the mechanical property of the matrix material that employing twin screw extruder obtains is better.
Table 1 pulp strengthens expanded flame-retardant polypropylene composite-material formula
Table 2 pulp strengthens expanded flame-retardant polypropylene composite property
Claims (5)
1. aramid pulp strengthens an expanded flame-retardant polypropylene matrix material, its component take listed as parts by weight as:
100 parts of polypropylene;
25 ~ 30 parts of expansion type flame retardants;
1 ~ 10 part of aramid pulp;
5 ~ 10 parts of polypropylene grafted maleic anhydrides;
1 ~ 2 part of silane coupling agent;
Described expansion type flame retardant is the EPFR-100D of general plug furan (Qingyuan City) phosphorus chemistry company limited, and it is applied to polyacrylic extrusion and does not have neatly situation;
Described polypropylene is homopolymerization or Co-polypropylene, and melting index is 2.5 ~ 8.5g/10min;
The density of described aramid pulp is 1.03-1.04g/cm
3;
Its percentage of grafting of described polypropylene grafted maleic anhydride is 1%;
Described silane coupling agent is selected from the one in γ-aminopropyl triethoxysilane, γ-(2,3-epoxy the third oxygen) propyl trimethoxy silicane, γ-(methacryloxypropyl) propyl trimethoxy silicane.
2. a kind of aramid pulp as claimed in claim 1 strengthens the preparation method of expanded flame-retardant polypropylene matrix material, and concrete steps are as follows:
(1) by aramid pulp, expansion type flame retardant joins in organic solvent, after stirring, adds silane coupling agent to stir, and after suction filtration, air blast is dried and obtained composite flame-retardant agent; In every 300mL organic solvent, add the aramid pulp of 1 ~ 10g, expansion type flame retardant and the 1 ~ 2g silane coupling agent of 25 ~ 30g;
(2) by polypropylene, composite flame-retardant agent, polypropylene grafted maleic anhydride, after mixing at 180 ℃ ~ 200 ℃ of Banbury mixeies, under 50 ~ 200 revs/min of rotating speeds melt blending after 5 ~ 10 minutes, take out obtain aramid pulp strengthen expanded flame-retardant polypropylene matrix material or in parallel equidirectional two-screw forcing machine blending extrusion granulation obtain matrix material, 170 ~ 180 ℃, its expressing technique Wei Yi district, two 180 ~ 200 ℃, districts, three 190 ~ 210 ℃, districts, four 190 ~ 200 ℃, districts, screw speed 200 ~ 300 r/min, feeding frequency 18 ~ 25 Hz.
3. a kind of aramid pulp as claimed in claim 2 strengthens the preparation method of expanded flame-retardant polypropylene matrix material, it is characterized in that: in described step (1) by aramid pulp, expansion type flame retardant joins in organic solvent, stirring rake stirs 3 hours with 600r/min rotating speed, add silane coupling agent to stir 10 minutes, after suction filtration, 80 ℃ of air blast are dried and within 3 hours, are obtained composite flame-retardant agent.
4. a kind of aramid pulp as claimed in claim 3 strengthens the preparation method of expanded flame-retardant polypropylene matrix material, it is characterized in that: described organic solvent is dehydrated alcohol, methyl alcohol or toluene.
5. a kind of aramid pulp as claimed in claim 2 strengthens the preparation method of expanded flame-retardant polypropylene matrix material, it is characterized in that: in step (2) by polypropylene, composite flame-retardant agent, polypropylene grafted maleic anhydride, after mixing, in parallel equidirectional two-screw forcing machine, blending extrusion granulation obtains matrix material, 170 ~ 180 ℃, its expressing technique Wei Yi district, two 180 ~ 200 ℃, districts, three 190 ~ 210 ℃, districts, four 190 ~ 200 ℃, districts, screw speed 200 ~ 300 r/min, feeding frequency 18 ~ 25 Hz.
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| CN104419060B (en) * | 2013-08-29 | 2017-09-05 | 合肥杰事杰新材料股份有限公司 | A kind of continuous organic fiber filling polypropylene composite material and preparation method thereof |
| CN104231515A (en) * | 2014-09-11 | 2014-12-24 | 常州大学 | Anti-friction polypropylene material and preparation method thereof |
| CN106750941A (en) * | 2016-12-22 | 2017-05-31 | 阜阳市三郁包装材料有限公司 | Modified polypropylene flame redardant foamed board of a kind of hydridization aramid fiber silica aerogel and preparation method thereof |
| CN107163381A (en) * | 2017-05-24 | 2017-09-15 | 上海彩艳实业有限公司 | Polypropylene fibre halogen-free flame-retardant master batch and its manufacture method |
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| 李锦春等."芳纶浆粕增强聚丙烯复合材料的结构与性能".《化工学报》.2007,第58卷(第12期),第3191-3196页. |
| 陈小随等."十溴二苯乙烷协同芳纶纤维增强阻燃聚丙烯复合材料的性能研究".《中国塑料》.2011,第25卷(第6期),第26-30页. |
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