CN108003473A - A kind of high fire-retardance polypropylene mesh gasket for packing and preparation method thereof - Google Patents
A kind of high fire-retardance polypropylene mesh gasket for packing and preparation method thereof Download PDFInfo
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- CN108003473A CN108003473A CN201711466265.0A CN201711466265A CN108003473A CN 108003473 A CN108003473 A CN 108003473A CN 201711466265 A CN201711466265 A CN 201711466265A CN 108003473 A CN108003473 A CN 108003473A
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- 239000004743 Polypropylene Substances 0.000 title claims abstract description 50
- -1 polypropylene Polymers 0.000 title claims abstract description 47
- 229920001155 polypropylene Polymers 0.000 title claims abstract description 47
- 238000002360 preparation method Methods 0.000 title claims abstract description 8
- 238000012856 packing Methods 0.000 title abstract 4
- 239000003063 flame retardant Substances 0.000 claims abstract description 101
- 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 claims abstract description 91
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims abstract description 22
- 239000000463 material Substances 0.000 claims abstract description 20
- 239000000203 mixture Substances 0.000 claims abstract description 12
- 229910021536 Zeolite Inorganic materials 0.000 claims abstract description 11
- ILRRQNADMUWWFW-UHFFFAOYSA-K aluminium phosphate Chemical compound O1[Al]2OP1(=O)O2 ILRRQNADMUWWFW-UHFFFAOYSA-K 0.000 claims abstract description 11
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims abstract description 11
- GVALZJMUIHGIMD-UHFFFAOYSA-H magnesium phosphate Chemical compound [Mg+2].[Mg+2].[Mg+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O GVALZJMUIHGIMD-UHFFFAOYSA-H 0.000 claims abstract description 11
- 239000004137 magnesium phosphate Substances 0.000 claims abstract description 11
- 229960002261 magnesium phosphate Drugs 0.000 claims abstract description 11
- 229910000157 magnesium phosphate Inorganic materials 0.000 claims abstract description 11
- 235000010994 magnesium phosphates Nutrition 0.000 claims abstract description 11
- 239000000843 powder Substances 0.000 claims abstract description 11
- 239000010457 zeolite Substances 0.000 claims abstract description 11
- 239000006087 Silane Coupling Agent Substances 0.000 claims abstract description 8
- 239000004114 Ammonium polyphosphate Substances 0.000 claims abstract description 5
- 229920000877 Melamine resin Polymers 0.000 claims abstract description 5
- 235000019826 ammonium polyphosphate Nutrition 0.000 claims abstract description 5
- 229920001276 ammonium polyphosphate Polymers 0.000 claims abstract description 5
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 claims abstract description 5
- WXZMFSXDPGVJKK-UHFFFAOYSA-N pentaerythritol Chemical compound OCC(CO)(CO)CO WXZMFSXDPGVJKK-UHFFFAOYSA-N 0.000 claims abstract description 5
- 238000011049 filling Methods 0.000 claims description 51
- 238000001035 drying Methods 0.000 claims description 11
- 229920005989 resin Polymers 0.000 claims description 11
- 239000011347 resin Substances 0.000 claims description 11
- 238000003756 stirring Methods 0.000 claims description 11
- 239000002994 raw material Substances 0.000 claims description 7
- 238000002156 mixing Methods 0.000 claims description 5
- 238000001125 extrusion Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- 238000002791 soaking Methods 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000002518 antifoaming agent Substances 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- 239000000110 cooling liquid Substances 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 claims description 3
- 239000000945 filler Substances 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 238000001192 hot extrusion Methods 0.000 claims description 3
- 238000007493 shaping process Methods 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 238000002485 combustion reaction Methods 0.000 abstract description 4
- 230000000979 retarding effect Effects 0.000 abstract 4
- 239000011248 coating agent Substances 0.000 abstract 2
- 238000000576 coating method Methods 0.000 abstract 2
- 239000004925 Acrylic resin Substances 0.000 abstract 1
- 229920000178 Acrylic resin Polymers 0.000 abstract 1
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 230000000977 initiatory effect Effects 0.000 abstract 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 10
- 229910052799 carbon Inorganic materials 0.000 description 10
- 230000000694 effects Effects 0.000 description 9
- 230000000052 comparative effect Effects 0.000 description 6
- 239000002253 acid Substances 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000006260 foam Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 1
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- 238000007655 standard test method Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K13/00—Use of mixtures of ingredients not covered by one single of the preceding main groups, each of these compounds being essential
- C08K13/02—Organic and inorganic ingredients
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/32—Phosphorus-containing compounds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/34—Silicon-containing compounds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/05—Alcohols; Metal alcoholates
- C08K5/053—Polyhydroxylic alcohols
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/16—Nitrogen-containing compounds
- C08K5/34—Heterocyclic compounds having nitrogen in the ring
- C08K5/3467—Heterocyclic compounds having nitrogen in the ring having more than two nitrogen atoms in the ring
- C08K5/3477—Six-membered rings
- C08K5/3492—Triazines
- C08K5/34922—Melamine; Derivatives thereof
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
- H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
- H01B3/44—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins
- H01B3/441—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins from alkenes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/29—Protection against damage caused by extremes of temperature or by flame
- H01B7/295—Protection against damage caused by extremes of temperature or by flame using material resistant to flame
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/32—Phosphorus-containing compounds
- C08K2003/321—Phosphates
- C08K2003/322—Ammonium phosphate
- C08K2003/323—Ammonium polyphosphate
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/32—Phosphorus-containing compounds
- C08K2003/321—Phosphates
- C08K2003/326—Magnesium phosphate
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/32—Phosphorus-containing compounds
- C08K2003/321—Phosphates
- C08K2003/327—Aluminium phosphate
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/02—Flame or fire retardant/resistant
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/20—Applications use in electrical or conductive gadgets
- C08L2203/202—Applications use in electrical or conductive gadgets use in electrical wires or wirecoating
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Fireproofing Substances (AREA)
Abstract
The present invention relates to a kind of high fire-retardance polypropylene mesh gasket for packing and preparation method thereof, its formula includes：65 ~ 95 parts of acrylic resin, 5 ~ 20 parts of expansion type flame retardant, 5 ~ 10 parts of fire retarding synergist, 1 ~ 3 part of silane coupling agent；Wherein, the formula of expansion type flame retardant is to include 40 ~ 60 parts of ammonium polyphosphate, 20 ~ 40 parts of melamine, the mixture of 10 ~ 30 parts of pentaerythrite；The fire retarding synergist is the product of zeolite powder, magnesium phosphate, aluminum phosphate mixture after concentrated hydrochloric acid soaks and dries, its ratio be：20 ~ 40 parts of zeolite powder, 20 ~ 40 parts of magnesium phosphate, 30 ~ 50 parts of aluminum phosphate.In the present invention program, it can accelerate to expand the formation speed of carbon-coating by fire retarding synergist, reduce the usage amount of expansion type flame retardant, the colleague for improving fire resistance keeps good mechanical performance；And fire retarding synergist itself can improve the fire resistance of gasket for packing, when expansion carbon-coating does not generate, gasket for packing can be made temporarily to be destroyed from high-temp combustion, improve material initiation temperature.
Description
Technical Field
The invention relates to the technical field of filling ropes, in particular to a high-flame-retardant polypropylene reticular filling rope and a preparation method thereof.
Background
The electric wire and the cable are products with large production value in the electrical industry and are indispensable basic materials for transmitting electric energy; the cable generally comprises three phase lines, an insulating layer is arranged between the three phase lines, the outermost layer wraps the round protection and insulating layer, gaps are formed between the outermost layer and the three phase lines, the structure of the cable is unstable, and after the gaps are filled with fillers, the round shape of the outer protection layer is undoubtedly complete, so that the purposes of high strength and stable structure are achieved.
At present, the cable filler is generally made of various filling ropes made of polypropylene; polypropylene, abbreviated as PP, is a thermoplastic resin polymerized from propylene, has excellent mechanical properties, and is generally improved in flame retardancy by adding a flame retardant; however, when the filling rope made of the modified PP is burnt at high temperature, a large amount of black smoke still comes out, so that the rescue is hindered and the human body is greatly injured when a fire occurs; or the mechanical property of the modified PP material is reduced too much, so that the quality of the product cannot be ensured. The intumescent flame retardant on the market in recent years can better solve the problem of a large amount of black smoke, however, a larger amount of intumescent flame retardant is required to achieve a better flame retardant effect, which not only seriously affects the mechanical properties of polypropylene, but also has higher manufacturing cost; for increasingly severe industrial safety and environmental protection standards and increasingly severe market competition environments, on the premise of not reducing the mechanical property of the polypropylene filling rope, the polypropylene filling rope with low price, high efficiency, flame retardance and environmental protection is developed, and is the inevitable development direction of the polypropylene filling rope.
Disclosure of Invention
Based on the above, the invention aims to overcome at least one defect in the prior art, and provides a high-flame-retardant polypropylene reticular filling rope which is excellent in flame-retardant property and good in mechanical property.
The invention also provides a preparation method of the high-flame-retardant polypropylene netted filling rope, and the polypropylene netted filling rope with excellent flame-retardant performance and good mechanical property is prepared by the method.
In order to achieve the purpose, the invention adopts the technical scheme that:
the high-flame-retardant polypropylene netted filling rope comprises the following components in parts by weight:
65-95 parts of polypropylene resin, 10-20 parts of intumescent flame retardant, 5-10 parts of flame retardant synergist and 1-2 parts of silane coupling agent; wherein,
the formula of the intumescent flame retardant comprises, by weight, 40-60 parts of ammonium polyphosphate, 20-40 parts of melamine and 10-30 parts of pentaerythritol;
the flame-retardant synergist is a product obtained by soaking a mixture of zeolite powder, magnesium phosphate and aluminum phosphate in concentrated hydrochloric acid and drying, and the flame-retardant synergist comprises the following components in percentage by weight: 20-40 parts of zeolite powder, 20-40 parts of magnesium phosphate and 30-50 parts of aluminum phosphate.
In the scheme, the intumescent flame retardant takes ammonium polyphosphate as an acid source, melamine as an air source and pentaerythritol as a carbon source, and the inventor finds that the flame-retardant synergist and the intumescent flame retardant are matched to modify the polypropylene to form the reticular filling rope, so that the flame-retardant effect is better than that of the intumescent flame retardant used alone, the usage amount of the intumescent flame retardant is reduced, and the mechanical property of the prepared filling rope is better; when the filling rope is ignited by high temperature, an expanded carbon layer can be rapidly generated on the surface, so that a heat source and an external oxygen environment are isolated, and a self-extinguishing effect is achieved; the flame-retardant synergist can accelerate the generation speed of the intumescent carbon layer, reduce the usage amount of the intumescent flame retardant, improve the flame retardant property of the filling rope, temporarily prevent the filling rope from being damaged by high-temperature combustion when the intumescent carbon layer is not generated, and improve the ignition temperature of the material.
Further, the formula of the high-flame-retardant polypropylene reticular filling rope comprises the following components in parts by weight: 75 parts of polypropylene resin, 15 parts of intumescent flame retardant, 8 parts of flame retardant synergist and 2 parts of silane coupling agent. Experiments show that when the filling rope is prepared according to the formula amount, the obtained filling rope has the best flame retardant effect.
Further, the flame-retardant synergist is a product obtained by soaking and drying a mixture comprising 30 parts by weight of zeolite powder, 30 parts by weight of magnesium phosphate and 40 parts by weight of aluminum phosphate in concentrated hydrochloric acid. Experiments show that when the flame-retardant synergist is prepared according to the formula amount, the obtained flame-retardant synergist has the best effect, the using amount of the intumescent flame retardant can be reduced to the maximum extent, the flame-retardant effect of the prepared filling rope is the best, and the influence of the added flame retardant on the mechanical property of the filling rope can be reduced to the maximum extent.
Further, the high-flame-retardant polypropylene netted filling rope further comprises 1-2 parts of a defoaming agent. The antifoaming agent is added to eliminate foam generated in the stirring process, so that the problem that the compatibility effect of the flame retardant, the flame retardant synergist and the polypropylene is poor due to uneven mixing caused by excessive foam in the process of stirring and mixing materials is avoided.
Further, the polypropylene resin is a polypropylene resin with a model number of T03.
The invention also provides a preparation method of the high-flame-retardant polypropylene reticular filling rope, which comprises the following steps:
s1, preparing a flame-retardant synergist: adding concentrated hydrochloric acid into the mixture of zeolite powder, magnesium phosphate and aluminum phosphate, stirring for 30 minutes, heating and drying while stirring to obtain a powdery mixture, namely the flame-retardant synergist;
s2, mixing raw materials: adding the raw materials such as polypropylene resin, intumescent flame retardant, flame retardant synergist, silane coupling agent and the like into a stirrer according to the formula amount, and uniformly stirring at the temperature of 80-90 ℃;
s3, extrusion molding: softening the material of the mixed material obtained in the step s2 through a host machine of a hot extrusion machine, wherein the temperature in the host machine is 180-240 ℃; extruding the softened mixed material into a film through a die head of a hot extruder, wherein the temperature of the die head is 210-215 ℃; then cooling the steel plate by cooling liquid to enter a first traction mode;
s4, cutting by a blade, stretching and shaping by a stretching plate, drying, and entering a second traction;
s5, perforating and opening the net by a needle cylinder to form the reticular polypropylene filling rope.
According to the scheme, the flame-retardant synergist is prepared firstly, and then the flame-retardant synergist and other raw materials are prepared into the net-shaped filling rope together, so that the obtained filling rope is excellent in flame retardance, good in mechanical property and low in cost.
Further, hydrochloric acid may be recovered during the drying process. And the consumption of the hydrochloric acid is reduced and the cost is saved by recovering the concentrated hydrochloric acid.
Further, the host computer of heat extrusion machine divides into 5 districts in proper order, and first district temperature 180~200 ℃, second district temperature 200~220 ℃, third district temperature 220~240 ℃, fourth district temperature 210~220 ℃, fifth district temperature 210~215 ℃. By setting different temperature areas, the polypropylene mixed material is heated in the hot extruder to be changed smoothly, and the flame retardant and mechanical properties of the material are prevented from being reduced by too large temperature change.
Compared with the prior art, the invention has the beneficial effects that:
according to the high-flame-retardant polypropylene netted filling rope, the generation speed of the expanded carbon layer can be accelerated through the flame-retardant synergist, the using amount of the intumescent flame retardant is reduced, and the flame retardant performance is improved while the colleagues keep good mechanical performance; the flame-retardant synergist can improve the flame-retardant performance of the filling rope, so that the filling rope can be temporarily prevented from being damaged by high-temperature combustion when the expanded carbon layer is not generated, the ignition temperature of the material is improved, and the cost is low.
Detailed Description
In order that the objects, aspects and advantages of the present invention will become more apparent, the present invention will be further described with reference to the following examples, it being understood that the specific embodiments described herein are only for illustrating the present invention and are not to be construed as limiting the scope of the present invention.
Examples
The high flame retardant polypropylene netted filling rope comprises the following components in parts by weight:
TABLE 1
The preparation method of the filling rope comprises the following steps:
s1, preparing a flame-retardant synergist: adding concentrated hydrochloric acid into the mixture of zeolite powder, magnesium phosphate and aluminum phosphate, stirring for 30 minutes, heating and drying while stirring to obtain a powdery mixture, namely the flame-retardant synergist;
s2, mixing raw materials: adding the raw materials such as polypropylene resin, intumescent flame retardant, flame retardant synergist, silane coupling agent and the like into a stirrer according to the formula amount, and uniformly stirring at the temperature of 80-90 ℃;
s3, extrusion molding: softening the material of the mixed material obtained in the step s2 through a host machine of a hot extrusion machine, wherein the temperature in the host machine is 180-240 ℃; extruding the softened mixed material into a film through a die head of a hot extruder, wherein the temperature of the die head is 210-215 ℃; then cooling the steel plate by cooling liquid to enter a first traction mode;
s4, cutting by a blade, stretching and shaping by a stretching plate, drying, and entering a second traction;
s5, perforating and opening the net by a needle cylinder to form the reticular polypropylene filling rope.
The main machine of the hot extruder is sequentially divided into 5 zones, wherein the temperature of the first zone is 180-200 ℃, the temperature of the second zone is 200-220 ℃, the temperature of the third zone is 220-240 ℃, the temperature of the fourth zone is 210-220 ℃, and the temperature of the fifth zone is 210-215 ℃; by setting different temperature areas, the polypropylene mixed material is heated in the hot extruder to be changed smoothly, and the flame retardant and mechanical properties of the material are prevented from being reduced by too large temperature change.
According to the scheme, the flame-retardant synergist is prepared, the intumescent flame retardant takes ammonium polyphosphate as an acid source, melamine as an air source and pentaerythritol as a carbon source, and the flame-retardant synergist and the intumescent flame retardant are matched to modify the polypropylene to prepare the netted filling rope, so that the flame-retardant effect is better than that of the reticular filling rope prepared by singly using the intumescent flame retardant, the using amount of the intumescent flame retardant is reduced, and the mechanical property of the prepared filling rope is better; when the filling rope is ignited by high temperature, an expanded carbon layer can be rapidly generated on the surface, so that a heat source and an external oxygen environment are isolated, and a self-extinguishing effect is achieved; the flame-retardant synergist can accelerate the generation speed of the intumescent carbon layer, reduce the usage amount of the intumescent flame retardant, improve the flame-retardant performance of the filling rope, temporarily prevent the filling rope from being damaged by high-temperature combustion when the intumescent carbon layer is not generated, and improve the ignition temperature of the material; the obtained filling rope has excellent flame retardance, good mechanical property and lower cost.
Comparative example 3
The flame-retardant filling rope of the cable purchased in the market has the flame-retardant mode of expansion flame retardance.
Comparing the polypropylene mesh-shaped filling ropes obtained in the examples 1 to 6 with the comparative examples 1 to 3 in terms of the film thickness of 0.5 +/-0.03 mm and the film width of 10mm, and comparing the flame retardant property and the mechanical property, wherein the results are shown in Table 2;
wherein, the flame retardant rating test adopts a UL94 standard test method.
TABLE 2
| Item | UL94 | Tensile strength |
| Example 1 | V-0 | 23.25 |
| Example 2 | V-1 | 26.67 |
| Example 3 | V-0 | 25.24 |
| Example 4 | V-0 | 24.11 |
| Example 5 | V-0 | 25.10 |
| Example 6 | V-0 | 24.86 |
| Comparative example 1 | V-2 | 24.73 |
| Comparative example 2 | V-0 | 15.12 |
| Comparative example 3 | V-2 | 21.03 |
Through the analysis of the table 2, it can be seen that the flame retardant property and the mechanical property of the invention are optimal under the scheme of the embodiment 3; although the total adding amount of the flame retardant and the flame retardant synergist in the embodiment 3 is larger than that of the comparative example 1, the tensile strength is still increased; in the scheme of the embodiment 2, when a lower amount of flame retardant is used, the flame retardant performance and the mechanical property are still relatively superior; the polypropylene reticular filling rope manufactured by the scheme of the invention has better flame retardant property and mechanical property than common flame retardant filling ropes in the market.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (7)
1. The high-flame-retardant polypropylene netted filling rope is characterized by comprising the following components in parts by weight:
65-95 parts of polypropylene resin, 5-20 parts of intumescent flame retardant, 5-10 parts of flame retardant synergist and 1-3 parts of silane coupling agent; wherein,
the formula of the intumescent flame retardant comprises, by weight, 40-60 parts of ammonium polyphosphate, 20-40 parts of melamine and 10-30 parts of pentaerythritol;
the flame-retardant synergist is a product obtained by soaking a mixture of zeolite powder, magnesium phosphate and aluminum phosphate in concentrated hydrochloric acid and drying, and the flame-retardant synergist comprises the following components in percentage by weight: 20-40 parts of zeolite powder, 20-40 parts of magnesium phosphate and 30-50 parts of aluminum phosphate.
2. The high flame retardant polypropylene reticular filling rope according to claim 1, which is characterized in that the formula comprises the following components in parts by weight: 75 parts of polypropylene resin, 15 parts of intumescent flame retardant, 8 parts of flame retardant synergist and 2 parts of silane coupling agent.
3. The high flame-retardant polypropylene reticular filling rope according to claim 1, wherein the flame-retardant synergist is a product obtained by soaking and drying a mixture comprising 30 parts by weight of zeolite powder, 30 parts by weight of magnesium phosphate and 40 parts by weight of aluminum phosphate in concentrated hydrochloric acid.
4. The high flame retardant polypropylene reticular filling rope according to claim 1, characterized in that the high flame retardant polypropylene reticular filling rope further comprises 1-2 parts of a defoaming agent.
5. The high flame retardant polypropylene mesh-type filler rope according to claim 1, wherein the polypropylene resin is a polypropylene resin having a model number of T03.
6. The preparation method of the high flame retardant polypropylene netted filling rope as claimed in any one of claims 1 to 5, characterized by comprising the following steps:
s1, preparing a flame-retardant synergist: adding concentrated hydrochloric acid into the mixture of zeolite powder, magnesium phosphate and aluminum phosphate, stirring for 30 minutes, heating and drying while stirring to obtain a powdery mixture, namely the flame-retardant synergist;
s2, mixing raw materials: adding the polypropylene resin, the intumescent flame retardant, the flame-retardant synergist, the silane coupling agent and other raw materials into a stirrer according to the formula amount, and uniformly stirring at the temperature of 80-90 ℃;
s3, extrusion molding: softening the material of the mixed material obtained in the step s2 through a host machine of a hot extrusion machine, wherein the temperature in the host machine is 180-240 ℃; extruding the softened mixed material into a film through a die head of a hot extruder, wherein the temperature of the die head is 210-215 ℃; then cooling the steel plate by cooling liquid to enter a first traction mode;
s4, cutting by a blade, stretching and shaping by a stretching plate, drying, and entering a second traction;
s5, perforating and opening the net by a needle cylinder to form the reticular polypropylene filling rope.
7. The method according to claim 6, wherein the main body of the hot extruder is divided into 5 zones, the first zone temperature is 180 to 200 ℃, the second zone temperature is 200 to 220 ℃, the third zone temperature is 220 to 240 ℃, the fourth zone temperature is 210 to 220 ℃, and the fifth zone temperature is 210 to 215 ℃ in sequence.
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| CN201711466265.0A CN108003473A (en) | 2017-12-28 | 2017-12-28 | A kind of high fire-retardance polypropylene mesh gasket for packing and preparation method thereof |
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| CN201711466265.0A CN108003473A (en) | 2017-12-28 | 2017-12-28 | A kind of high fire-retardance polypropylene mesh gasket for packing and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2021097661A1 (en) * | 2019-11-19 | 2021-05-27 | 南京先进生物材料与过程装备研究院有限公司 | Special flame-retardant polypropylene for battery pack upper cover of new energy vehicle |
| CN114775084A (en) * | 2022-05-06 | 2022-07-22 | 安徽恳诺新材料有限公司 | Large-coil-diameter flame-retardant polypropylene filling rope |
| CN119529460A (en) * | 2024-11-27 | 2025-02-28 | 无锡市恒龙电缆材料有限公司 | A low-density flame-retardant PP mesh cable filling rope and preparation method thereof |
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| CN114775084A (en) * | 2022-05-06 | 2022-07-22 | 安徽恳诺新材料有限公司 | Large-coil-diameter flame-retardant polypropylene filling rope |
| CN114775084B (en) * | 2022-05-06 | 2023-06-30 | 安徽恳诺新材料有限公司 | Large-disc-diameter flame-retardant polypropylene filling rope |
| CN119529460A (en) * | 2024-11-27 | 2025-02-28 | 无锡市恒龙电缆材料有限公司 | A low-density flame-retardant PP mesh cable filling rope and preparation method thereof |
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