CN115926307A - Polypropylene extrusion foaming heat-insulation waterproof membrane material and preparation method thereof - Google Patents
Polypropylene extrusion foaming heat-insulation waterproof membrane material and preparation method thereof Download PDFInfo
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- CN115926307A CN115926307A CN202211199185.4A CN202211199185A CN115926307A CN 115926307 A CN115926307 A CN 115926307A CN 202211199185 A CN202211199185 A CN 202211199185A CN 115926307 A CN115926307 A CN 115926307A
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- -1 Polypropylene Polymers 0.000 title claims abstract description 92
- 239000004743 Polypropylene Substances 0.000 title claims abstract description 84
- 229920001155 polypropylene Polymers 0.000 title claims abstract description 84
- 239000000463 material Substances 0.000 title claims abstract description 71
- 238000001125 extrusion Methods 0.000 title claims abstract description 68
- 238000005187 foaming Methods 0.000 title claims abstract description 63
- 238000009413 insulation Methods 0.000 title claims abstract description 52
- 239000012528 membrane Substances 0.000 title claims abstract description 34
- 238000002360 preparation method Methods 0.000 title abstract description 5
- 239000002667 nucleating agent Substances 0.000 claims abstract description 17
- 239000006260 foam Substances 0.000 claims abstract description 7
- 239000002904 solvent Substances 0.000 claims abstract description 6
- 239000011148 porous material Substances 0.000 claims abstract description 4
- 239000000155 melt Substances 0.000 claims description 94
- 238000002156 mixing Methods 0.000 claims description 82
- 238000004804 winding Methods 0.000 claims description 82
- 238000001816 cooling Methods 0.000 claims description 70
- 239000010724 circulating oil Substances 0.000 claims description 58
- 238000007493 shaping process Methods 0.000 claims description 51
- 230000009471 action Effects 0.000 claims description 48
- 239000002994 raw material Substances 0.000 claims description 46
- 238000002844 melting Methods 0.000 claims description 40
- 230000008018 melting Effects 0.000 claims description 40
- 238000005520 cutting process Methods 0.000 claims description 36
- 239000004088 foaming agent Substances 0.000 claims description 34
- 239000000203 mixture Substances 0.000 claims description 27
- 238000000034 method Methods 0.000 claims description 15
- OFBQJSOFQDEBGM-UHFFFAOYSA-N Pentane Chemical compound CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 claims description 14
- 239000012530 fluid Substances 0.000 claims description 14
- 210000003850 cellular structure Anatomy 0.000 claims description 13
- 229920005989 resin Polymers 0.000 claims description 13
- 239000011347 resin Substances 0.000 claims description 13
- 239000002131 composite material Substances 0.000 claims description 12
- 238000000354 decomposition reaction Methods 0.000 claims description 12
- 230000006837 decompression Effects 0.000 claims description 12
- 230000008030 elimination Effects 0.000 claims description 12
- 238000003379 elimination reaction Methods 0.000 claims description 12
- 239000007789 gas Substances 0.000 claims description 12
- 238000000465 moulding Methods 0.000 claims description 12
- 230000008569 process Effects 0.000 claims description 12
- 238000010008 shearing Methods 0.000 claims description 12
- 230000003068 static effect Effects 0.000 claims description 12
- HQQADJVZYDDRJT-UHFFFAOYSA-N ethene;prop-1-ene Chemical group C=C.CC=C HQQADJVZYDDRJT-UHFFFAOYSA-N 0.000 claims description 11
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 10
- 238000000265 homogenisation Methods 0.000 claims description 10
- 230000006641 stabilisation Effects 0.000 claims description 10
- 238000011105 stabilization Methods 0.000 claims description 10
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 8
- 239000003963 antioxidant agent Substances 0.000 claims description 8
- 230000003078 antioxidant effect Effects 0.000 claims description 8
- 210000004027 cell Anatomy 0.000 claims description 8
- 229920005629 polypropylene homopolymer Polymers 0.000 claims description 8
- 239000012188 paraffin wax Substances 0.000 claims description 7
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 6
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 6
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 6
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 6
- 229920002725 thermoplastic elastomer Polymers 0.000 claims description 6
- 229920000181 Ethylene propylene rubber Polymers 0.000 claims description 5
- BGYHLZZASRKEJE-UHFFFAOYSA-N [3-[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxy]-2,2-bis[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxymethyl]propyl] 3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoate Chemical compound CC(C)(C)C1=C(O)C(C(C)(C)C)=CC(CCC(=O)OCC(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)=C1 BGYHLZZASRKEJE-UHFFFAOYSA-N 0.000 claims description 5
- 229920001400 block copolymer Polymers 0.000 claims description 5
- CJZGTCYPCWQAJB-UHFFFAOYSA-L calcium stearate Chemical compound [Ca+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O CJZGTCYPCWQAJB-UHFFFAOYSA-L 0.000 claims description 5
- 235000013539 calcium stearate Nutrition 0.000 claims description 5
- 239000008116 calcium stearate Substances 0.000 claims description 5
- 239000001569 carbon dioxide Substances 0.000 claims description 5
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 5
- 229920000092 linear low density polyethylene Polymers 0.000 claims description 5
- 239000004707 linear low-density polyethylene Substances 0.000 claims description 5
- 229920001684 low density polyethylene Polymers 0.000 claims description 5
- 239000004702 low-density polyethylene Substances 0.000 claims description 5
- SSDSCDGVMJFTEQ-UHFFFAOYSA-N octadecyl 3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoate Chemical compound CCCCCCCCCCCCCCCCCCOC(=O)CCC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 SSDSCDGVMJFTEQ-UHFFFAOYSA-N 0.000 claims description 5
- JKIJEFPNVSHHEI-UHFFFAOYSA-N Phenol, 2,4-bis(1,1-dimethylethyl)-, phosphite (3:1) Chemical compound CC(C)(C)C1=CC(C(C)(C)C)=CC=C1OP(OC=1C(=CC(=CC=1)C(C)(C)C)C(C)(C)C)OC1=CC=C(C(C)(C)C)C=C1C(C)(C)C JKIJEFPNVSHHEI-UHFFFAOYSA-N 0.000 claims description 4
- 239000001273 butane Substances 0.000 claims description 4
- 239000003086 colorant Substances 0.000 claims description 4
- 239000001307 helium Substances 0.000 claims description 4
- 229910052734 helium Inorganic materials 0.000 claims description 4
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 claims description 4
- 239000000314 lubricant Substances 0.000 claims description 4
- IJDNQMDRQITEOD-UHFFFAOYSA-N n-butane Chemical compound CCCC IJDNQMDRQITEOD-UHFFFAOYSA-N 0.000 claims description 4
- 229910052757 nitrogen Inorganic materials 0.000 claims description 4
- 229920013716 polyethylene resin Polymers 0.000 claims description 4
- XOOUIPVCVHRTMJ-UHFFFAOYSA-L zinc stearate Chemical compound [Zn+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O XOOUIPVCVHRTMJ-UHFFFAOYSA-L 0.000 claims description 4
- XDTMQSROBMDMFD-UHFFFAOYSA-N Cyclohexane Chemical compound C1CCCCC1 XDTMQSROBMDMFD-UHFFFAOYSA-N 0.000 claims description 3
- FBPFZTCFMRRESA-FSIIMWSLSA-N D-Glucitol Natural products OC[C@H](O)[C@H](O)[C@@H](O)[C@H](O)CO FBPFZTCFMRRESA-FSIIMWSLSA-N 0.000 claims description 3
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims description 3
- 239000005977 Ethylene Substances 0.000 claims description 3
- 229920000219 Ethylene vinyl alcohol Polymers 0.000 claims description 3
- GXDVEXJTVGRLNW-UHFFFAOYSA-N [Cr].[Cu] Chemical compound [Cr].[Cu] GXDVEXJTVGRLNW-UHFFFAOYSA-N 0.000 claims description 3
- CSJKPFQJIDMSGF-UHFFFAOYSA-K aluminum;tribenzoate Chemical compound [Al+3].[O-]C(=O)C1=CC=CC=C1.[O-]C(=O)C1=CC=CC=C1.[O-]C(=O)C1=CC=CC=C1 CSJKPFQJIDMSGF-UHFFFAOYSA-K 0.000 claims description 3
- 229910052786 argon Inorganic materials 0.000 claims description 3
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 3
- 239000006229 carbon black Substances 0.000 claims description 3
- UPHIPHFJVNKLMR-UHFFFAOYSA-N chromium iron Chemical compound [Cr].[Fe] UPHIPHFJVNKLMR-UHFFFAOYSA-N 0.000 claims description 3
- IVMYJDGYRUAWML-UHFFFAOYSA-N cobalt(ii) oxide Chemical compound [Co]=O IVMYJDGYRUAWML-UHFFFAOYSA-N 0.000 claims description 3
- 229920001577 copolymer Polymers 0.000 claims description 3
- 235000014113 dietary fatty acids Nutrition 0.000 claims description 3
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 claims description 3
- 229920006242 ethylene acrylic acid copolymer Polymers 0.000 claims description 3
- 239000000194 fatty acid Substances 0.000 claims description 3
- 229930195729 fatty acid Natural products 0.000 claims description 3
- 150000004665 fatty acids Chemical class 0.000 claims description 3
- SZVJSHCCFOBDDC-UHFFFAOYSA-N ferrosoferric oxide Chemical compound O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 claims description 3
- 229920001903 high density polyethylene Polymers 0.000 claims description 3
- 239000004700 high-density polyethylene Substances 0.000 claims description 3
- 229920001179 medium density polyethylene Polymers 0.000 claims description 3
- 239000004701 medium-density polyethylene Substances 0.000 claims description 3
- RKISUIUJZGSLEV-UHFFFAOYSA-N n-[2-(octadecanoylamino)ethyl]octadecanamide Chemical compound CCCCCCCCCCCCCCCCCC(=O)NCCNC(=O)CCCCCCCCCCCCCCCCC RKISUIUJZGSLEV-UHFFFAOYSA-N 0.000 claims description 3
- FATBGEAMYMYZAF-KTKRTIGZSA-N oleamide Chemical compound CCCCCCCC\C=C/CCCCCCCC(N)=O FATBGEAMYMYZAF-KTKRTIGZSA-N 0.000 claims description 3
- 239000000377 silicon dioxide Substances 0.000 claims description 3
- 239000001488 sodium phosphate Substances 0.000 claims description 3
- 229910000162 sodium phosphate Inorganic materials 0.000 claims description 3
- 239000000600 sorbitol Substances 0.000 claims description 3
- YPMOSINXXHVZIL-UHFFFAOYSA-N sulfanylideneantimony Chemical compound [Sb]=S YPMOSINXXHVZIL-UHFFFAOYSA-N 0.000 claims description 3
- 239000004408 titanium dioxide Substances 0.000 claims description 3
- 229920002554 vinyl polymer Polymers 0.000 claims description 3
- 239000011787 zinc oxide Substances 0.000 claims description 3
- FWLHAQYOFMQTHQ-UHFFFAOYSA-N 2-N-[8-[[8-(4-aminoanilino)-10-phenylphenazin-10-ium-2-yl]amino]-10-phenylphenazin-10-ium-2-yl]-8-N,10-diphenylphenazin-10-ium-2,8-diamine hydroxy-oxido-dioxochromium Chemical compound O[Cr]([O-])(=O)=O.O[Cr]([O-])(=O)=O.O[Cr]([O-])(=O)=O.Nc1ccc(Nc2ccc3nc4ccc(Nc5ccc6nc7ccc(Nc8ccc9nc%10ccc(Nc%11ccccc%11)cc%10[n+](-c%10ccccc%10)c9c8)cc7[n+](-c7ccccc7)c6c5)cc4[n+](-c4ccccc4)c3c2)cc1 FWLHAQYOFMQTHQ-UHFFFAOYSA-N 0.000 claims description 2
- 238000009835 boiling Methods 0.000 claims description 2
- 235000010216 calcium carbonate Nutrition 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims description 2
- FATBGEAMYMYZAF-UHFFFAOYSA-N oleicacidamide-heptaglycolether Natural products CCCCCCCCC=CCCCCCCCC(N)=O FATBGEAMYMYZAF-UHFFFAOYSA-N 0.000 claims description 2
- 229920000767 polyaniline Polymers 0.000 claims description 2
- 235000012239 silicon dioxide Nutrition 0.000 claims description 2
- ZVRHWGKIPBUPSS-UHFFFAOYSA-L tert-butylaluminum(2+) dibenzoate Chemical compound C(C1=CC=CC=C1)(=O)[O-].C(C)(C)(C)[Al+2].C(C1=CC=CC=C1)(=O)[O-] ZVRHWGKIPBUPSS-UHFFFAOYSA-L 0.000 claims description 2
- 238000005096 rolling process Methods 0.000 claims 2
- 238000004134 energy conservation Methods 0.000 abstract description 3
- 239000012774 insulation material Substances 0.000 abstract description 3
- 230000006872 improvement Effects 0.000 description 8
- 239000011230 binding agent Substances 0.000 description 6
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- 229920000642 polymer Polymers 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000006261 foam material Substances 0.000 description 2
- LYRFLYHAGKPMFH-UHFFFAOYSA-N octadecanamide Chemical compound CCCCCCCCCCCCCCCCCC(N)=O LYRFLYHAGKPMFH-UHFFFAOYSA-N 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
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- 239000004698 Polyethylene Substances 0.000 description 1
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- 230000007123 defense Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004794 expanded polystyrene Substances 0.000 description 1
- WTFXARWRTYJXII-UHFFFAOYSA-N iron(2+);iron(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[O-2].[Fe+2].[Fe+3].[Fe+3] WTFXARWRTYJXII-UHFFFAOYSA-N 0.000 description 1
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- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The invention discloses a polypropylene extrusion foaming heat-insulation waterproof membrane material and a preparation method thereof, and the polypropylene extrusion foaming heat-insulation waterproof membrane material comprises the following components in parts by mass: high melt strength polypropylene: 45-85 parts of a solvent; high crystalline polypropylene: 5-45 parts of a solvent; nucleating agent: 0.01-2 parts; the polypropylene extrusion foaming heat insulation waterproof film material has a uniform foam pore structure, the thickness is 2-6 mm, and the apparent density is 30-100 kg/m 3 The expansion ratio is 10 to 30. The polypropylene extrusion foaming heat insulation waterproof membrane material prepared by the invention has excellent heat insulation performance, the heat conductivity coefficient is far smaller than that of an unfoamed polypropylene material, the technical index of a heat insulation material is met, the apparent density is lower, and the average weight is reduced by 20-90% compared with that of a traditional material. The polypropylene extrusion foaming heat insulation waterproof membrane material prepared by the invention is applied to the field of automobiles and accords with the latest development trend of light weight, comfort and energy conservation of the automobile industry in the world.
Description
Technical Field
The invention relates to a high-molecular foaming material, in particular to a polypropylene extrusion foaming heat-insulation waterproof membrane material and a preparation method thereof, belonging to the field of heat-insulation materials.
Background
With the recovery of world economy, the global car yield is increased year by year, and the rapid development of the special high polymer materials for automobiles is promoted, so that the consumption of the special plastics for automobiles is increased from 710 ten thousand tons in 2012 to 1130 ten thousand tons in 2018, the average annual growth rate reaches 8%, and the reason for this is closely related to the development requirement of light weight of automobiles in recent years. The plastic for the vehicle is widely applied to other parts such as interior trims, exterior trims and automobile engine covers, and is beneficial to reducing the weight of a vehicle body, controlling vibration and noise and realizing heat preservation and insulation of the vehicle body. With the continuous deepening of the concept of energy conservation and environmental protection, the development of a safer, energy-saving and environment-friendly novel automobile is still the inevitable trend of the future automobile industry development, the dead weight of the automobile is further reduced in the next decade, and in addition, the continuous development and the gradual maturity of the new energy automobile technology, the automobile has more outstanding energy efficiency ratio and energy conservation and environmental protection in the future.
The high polymer foaming material is a light material which takes resin as a matrix and is internally formed by a plurality of foam structures, has the advantages of light weight, heat insulation, buffering, high specific strength, low price and the like, and has great application potential in the fields of daily necessities, packaging, transportation, military and national defense, aerospace industry and the like. Currently, the polymer foam materials for practical application mainly include four major categories, namely Expanded Polyurethane (EPU), expanded Polystyrene (EPS), expanded Polyethylene (EPE) and expanded polypropylene (EPP), wherein EPP has received extensive attention from researchers, producers and consumers due to its good thermal stability (the maximum use temperature can reach 130 ℃), excellent stress cracking resistance and high temperature dimensional stability, high tensile strength and impact strength, and excellent microwave environmental suitability, and has become an important research direction in the field of polymer foam materials.
In the field of automobile industry, the EPP has a plurality of potential application directions, including heat insulation pads, sound insulation pads, waterproof membranes, sun shields, ground mats, headrest hand pillows, door inner plates, engine covers, bumper energy absorption blocks, spare tire seats and the like.
Disclosure of Invention
Based on the above practical requirements, the technical problem solved by the invention is to provide a polypropylene extrusion foaming heat insulation waterproof membrane material with various excellent performances and wide application fields and a preparation method thereof.
In order to solve the technical problems, the invention provides the following technical scheme:
a polypropylene extrusion foaming heat insulation waterproof membrane material comprises the following components in percentage by mass:
high melt strength polypropylene: 45-85 parts of a solvent;
high crystalline polypropylene: 5-45 parts of a solvent;
nucleating agent: 0.01-2 parts;
wherein the high melt strength polypropylene is one or a mixture of a plurality of long chain branch polypropylene, micro-crosslinked polypropylene, ethylene/propylene block copolymer, ethylene/propylene copolymerized thermoplastic elastomer and ethylene propylene rubber, and the melt strength is 20-70 cN;
the polypropylene extrusion foaming heat insulation waterproof film material has a uniform foam pore structure, the thickness is 2-6 mm, and the apparent density is 30-100 kg/m 3 The expansion ratio is 10 to 30.
Preferably, the polypropylene extrusion foaming thermal insulation waterproof membrane material provided by the invention further comprises part or all of the following technical characteristics:
as an improvement of the technical scheme, the high-crystalline polypropylene is one or a mixture of more of high-crystalline homo-polypropylene, high-crystalline co-polypropylene and impact-resistant co-polypropylene, the melt strength is 15-20 cN, and the melting temperature is 160-240 ℃.
As an improvement of the technical scheme, the nucleating agent is one or a mixture of more of calcium carbonate, silicon dioxide, talcum powder, aluminum benzoate, tert-butyl aluminum benzoate, methylene bis (2,4-ditert-butyl-phenoxy) sodium phosphate, methylene bis (2,4-ditert-butyl-phenoxy) aluminum phosphate, polyvinyl cyclohexane, ethylene/acrylate copolymer, sorbitol and derivatives.
As an improvement of the technical scheme, the paint also comprises the following components: polyethylene resin: 0.1-10 parts; physical foaming agent: 2-7 parts; colorant: 0.01 to 3 portions; lubricant: 0.01-2 parts; antioxidant: 0.01 to 2 portions.
As an improvement of the technical scheme, the colorant is one or a mixture of more of titanium dioxide, zinc oxide, lithopone, carbon black, iron oxide black, copper chromium black, iron chromium black, cobalt black, aniline black, antimony sulfide and derivatives.
As an improvement of the technical scheme, the physical foaming agent is one or a mixture of more of carbon dioxide, nitrogen, helium, argon, pentane and butane in a supercritical fluid state.
As an improvement of the technical scheme, the polyethylene resin is one or a mixture of a plurality of low-density polyethylene, linear low-density polyethylene, ethylene-vinyl alcohol copolymer, ethylene-acrylic acid copolymer and ethylene propylene rubber, the melt strength is 20-40 cN, the melting temperature is 155-195 ℃, and the polydispersity index is 7.0-8.5.
As an improvement of the technical scheme, the lubricant is one or a mixture of more of ethylene bis stearamide, oleamide, calcium stearate, zinc stearate, high boiling paraffin, microcrystalline paraffin and fatty acid.
As an improvement of the technical scheme, the antioxidant is one or a mixture of more of antioxidant 1076, antioxidant 1010, antioxidant 300 and antioxidant 168.
The invention also provides a production method of the polypropylene extrusion foaming heat-insulation waterproof membrane material, which comprises the following process steps:
1) Fully mixing the components except the physical foaming agent by a high-speed mixer according to the mass ratio to obtain dry-mixed raw materials;
2) First-stage blending extrusion: the first-stage extruder adopts a single screw extruder with a mixing module, the diameter of the screw is 60-150 mm, the length-diameter ratio is 28-36, the rotating speed of the screw is set to be 15-25 r/min, the melt pressure is 15-30 MPa, and the melt temperature is 180-220 ℃;
adding the obtained dry-mixed raw materials into a material feeding device, setting the temperature of a feeding section to be 150-180 ℃, setting the temperature of a melting section to be 170-200 ℃, setting the temperature of a mixing section to be 200-240 ℃, setting the temperature of a homogenizing section to be 200-240 ℃ and setting the temperature of a metering section to be 200-240 ℃; in a first-stage single-screw extruder, dry-mixed raw materials form a blended melt under the actions of melting, shearing and mixing, in the process, a foaming compatilizer is decomposed to release a small amount of gas after reaching the decomposition temperature, the blended melt with a plurality of tiny compatibilization cores is formed, a supercritical fluid type physical foaming agent is introduced into the melting section, the physical foaming agent is compatible with the compatibilization cores through mixing, the physical foaming agent is fully dispersed in the blended melt to form a state stable blended melt, the melt is metered after further homogenization and stabilization, and the melt is continuously conveyed to a second-stage extruder;
3) Second-stage molding extrusion: the second-stage extruder adopts a single screw extruder with the tail end connected with a heat exchanger and a melt pump, the diameter of the screw is 90-200 mm, the length-diameter ratio is 26-34, the rotating speed of the screw is set to be 15-25 r/min, the melt pressure is 10-25 MPa, and the melt temperature is 160-200 ℃;
directly pushing the blended melt into a first-stage extruder, setting the temperature of three sections to be 160-200 ℃, the temperature of a heat exchanger and a melt pump to be 170-190 ℃, the temperature of a die head to be 160-180 ℃, the temperature of an outer lip of a neck ring die to be 110-130 ℃, the temperature of an inner lip of the neck ring die to be 105-125 ℃ and the pressure of the neck ring die to be 0.1-20 Mpa; gasifying a physical foaming agent in the blended melt through the decompression action of an annular die to form a uniform cell structure in the blended melt, forming a tubular fused blank, and continuously conveying the tubular fused blank to a cooling and shaping system;
4) A temperature control setting system: the temperature control shaping system adopts a composite temperature control system consisting of an external air ring temperature control device and an internal circulating oil temperature control deviceAnd the air flow of the external air ring temperature control device is 0.1-3 m 3 The flow rate of circulating oil of the internal circulating oil air ring temperature control device is 0.01-2 m3/min, and the diameter of the shaping device is 100-800 mm;
directly pushing the tubular molten blank into a second-stage extruder, setting the temperature of an air ring to be 10-25 ℃ and the temperature of circulating oil to be 70-100 ℃; the tubular molten blank is gradually cooled and shaped under the temperature control action of an external air ring temperature control device and an internal circulating oil temperature control device, the resin is rapidly crystallized under the action of a nucleating agent, the structure of a foam hole is uniform and stable, and a sheet blank material with the temperature of 70-100 ℃ is formed through online cutting, flattening and static elimination and is continuously conveyed to a cooling and winding system;
5) And (3) cooling and winding system: the winding system adopts an air roller cooling and on-line edge cutting and tension control device, and the air flow of the air roller is 0.1-3 m 3 Min, the traction speed of the main traction device is 5-500 m/min, the winding diameter is 0.5-2 m, and the winding width is 1-2 m;
directly pushing the tubular blank by a temperature control setting system, setting the winding tension to be 100-700N, cooling by an air roller, cutting edges on line and winding to obtain a finished product of the polypropylene extrusion foaming heat-insulation waterproof membrane material.
Compared with the prior art, the polypropylene extrusion foaming heat-insulation waterproof membrane material prepared by the invention has excellent heat-insulation performance, the heat conductivity coefficients are far smaller than those of an unfoamed polypropylene material (0.24W/(m & lt K)), the heat conductivity coefficients are smaller than 0.174W/(m & lt K)), the technical indexes of the heat-insulation material are met, and the lowest heat conductivity coefficient can reach 0.018W/(m & lt K) at 0 ℃; a low apparent density of 30 to 100kg/m at an expansion ratio of 10 to 30 3 And the weight is reduced by 20-90% compared with the traditional material on average.
The polypropylene extrusion foaming heat insulation waterproof membrane material prepared by the invention has a plurality of potential application directions in the field of automobile industry, and comprises a heat insulation pad, a sound insulation pad, a waterproof membrane, a sun shield, a ground mat, a headrest hand pillow, a door inner plate, an engine cover, a bumper energy absorption block, a spare tire seat and the like.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention may be implemented in accordance with the content of the description, and in order to make the above and other objects, features, and advantages of the present invention more clearly understood, the following detailed description is given with reference to the preferred embodiments.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments will be briefly described below.
FIG. 1 is a graph comparing thermal conductivity of a polypropylene extruded foamed insulating and waterproofing membrane material according to a preferred embodiment of the present invention, wherein (a) is a thermal conductivity curve of unfoamed polypropylene; (b) The thermal conductivity curve of the polypropylene extrusion foaming heat insulation waterproof membrane material with the foaming ratio of 10; (c) The thermal conductivity curve of the polypropylene extrusion foaming heat-insulation waterproof membrane material with the foaming ratio of 15; (d) The thermal conductivity curve of the polypropylene extrusion foaming heat insulation waterproof membrane material with the foaming ratio of 20; (e) The thermal conductivity curve of the polypropylene extrusion foaming heat insulation waterproof membrane material with the foaming multiplying power of 25; (f) The thermal conductivity curve of the polypropylene extrusion foaming heat insulation waterproof membrane material with the foaming ratio of 30.
Detailed Description
Other aspects, features and advantages of the present invention will become apparent from the following detailed description, which, when taken in conjunction with the drawings, illustrate by way of example the principles of the invention.
Example 1
1) Mixing the components according to the mass ratio
Long chain branched polypropylene: 85 parts of a mixture;
high crystalline homopolypropylene: 5 parts of a mixture;
calcium carbonate: 2 parts of (1);
low density polyethylene: 0.1 part
Titanium dioxide: 3 parts of a mixture;
ethylene bis stearamide: 0.01 part;
antioxidant 1076:0.01 part;
fully mixing the raw materials by a high-speed mixer to obtain dry-mixed raw materials;
2) First-stage blending extrusion: the first-stage extruder adopts a single screw extruder with a mixing module, the diameter of the screw is 60mm, the length-diameter ratio is 28, the rotating speed of the screw is set to be 15r/min, the melt pressure is 15MPa, and the melt temperature is 180 ℃;
adding the obtained dry-mixed raw materials into a material feeding device, setting the temperature of a feeding section to be 150 ℃, the temperature of a melting section to be 170 ℃, the temperature of a mixing section to be 200 ℃, the temperature of a homogenizing section to be 200 ℃ and the temperature of a metering section to be 200 ℃; in a first-stage single-screw extruder, dry-mixed raw materials form a blended melt under the actions of melting, shearing and mixing, in the process, a foaming compatilizer is decomposed to release a small amount of gas after reaching the decomposition temperature, so that the blended melt with a plurality of micro-compatibilization cores is formed, 2 parts of supercritical fluid carbon dioxide are introduced into the melting section, the blended melt is compatible with the compatibilization cores through mixing, so that a physical foaming agent is fully dispersed in the blended melt to form a stable blended melt, the blended melt is further homogenized and stabilized, then the melt is metered, and is continuously conveyed to a second-stage extruder;
3) Second-stage molding extrusion: the second-stage extruder adopts a single screw extruder with the tail end connected with a heat exchanger and a melt pump, the diameter of the screw is 90mm, the length-diameter ratio is 26, the rotating speed of the screw is set to be 15r/min, the melt pressure is 10MPa, and the melt temperature is 160 ℃;
directly pushing the blended melt by a first-stage extruder, setting the temperature of three sections to be 160 ℃, the temperature of a heat exchanger and a melt pump to be 170 ℃, the temperature of a die head to be 160 ℃, the temperature of an outer lip of a neck ring die to be 110 ℃, the temperature of an inner lip of the neck ring die to be 105 ℃ and the pressure of the neck ring die to be 0.1Mpa; gasifying a physical foaming agent in the blended melt through the decompression action of an annular die to form a uniform cell structure in the blended melt, forming a tubular fused blank, and continuously conveying the tubular fused blank to a cooling and shaping system;
4) A temperature control setting system: the temperature control shaping system adopts a composite temperature control system consisting of an external air ring temperature control device and an internal circulating oil temperature control device, and the air flow of the external air ring temperature control device is 0.1m 3 Temperature control device for/min internal circulation oil air ringCirculating oil flow 0.01m 3 Min, the diameter of the shaping device is 100mm;
directly pushing the tubular molten blank into a second-stage extruder, setting the temperature of an air ring to be 10 ℃ and the temperature of circulating oil to be 70 ℃; gradually cooling and shaping the tubular molten blank under the temperature control action of the external air ring temperature control device and the internal circulating oil temperature control device, rapidly crystallizing resin under the action of a nucleating agent, uniformly and stably forming a cellular structure, forming a sheet blank at the temperature of 70 ℃ through online cutting, flattening and static elimination, and continuously conveying the sheet blank to a cooling and winding system;
5) And (3) cooling and winding system: the winding system adopts an air roller cooling and on-line edge cutting and tension control device, and the air flow of the air roller is 0.1m 3 Min, the traction speed of the main traction device is 5m/min, the winding diameter is 0.5m, and the winding width is 1m;
directly pushing the tubular blank by a temperature control setting system, setting the winding tension to be 100N, cooling by an air roller, cutting edges on line and winding to obtain a finished product of the polypropylene extrusion foaming heat-insulation waterproof membrane material.
Example 2
1) Mixing the components in a mass ratio
Micro-crosslinked polypropylene: 70 parts of (B);
high crystalline copolymerized polypropylene: 15 parts of (1);
silica: 1 part;
linear low density polyethylene: 5 portions of
Zinc oxide: 2 parts of (1);
stearamide: 1 part;
antioxidant 1010:1 part;
fully mixing the raw materials by a high-speed mixer to obtain dry-mixed raw materials;
2) First-stage blending extrusion: the first-stage extruder adopts a single screw extruder with a mixing module, the diameter of the screw is 90mm, the length-diameter ratio is 32, the rotating speed of the screw is set to be 20r/min, the melt pressure is 20MPa, and the melt temperature is 200 ℃;
adding the obtained dry-mixed raw materials into a material feeding device, setting the temperature of a feeding section to be 160 ℃, setting the temperature of a melting section to be 180 ℃, setting the temperature of a mixing section to be 220 ℃, setting the temperature of a homogenizing section to be 220 ℃, and setting the temperature of a metering section to be 220 ℃; in a first-stage single-screw extruder, dry-mixed raw materials form a blended melt under the actions of melting, shearing and mixing, in the process, a foaming compatilizer is decomposed to release a small amount of gas after reaching the decomposition temperature, the blended melt with a plurality of micro compatibilization cores is formed, 3 parts of supercritical fluid nitrogen are introduced into a melting section, the compatibility with the compatibilization cores is realized through mixing, a physical foaming agent is fully dispersed in the blended melt to form a state-stable blended melt, the melt is metered after further homogenization and stabilization, and the blended melt is continuously conveyed to a second-stage extruder;
3) Second-stage molding extrusion: the second-stage extruder adopts a single screw extruder with the tail end connected with a heat exchanger and a melt pump, the diameter of a screw is 120mm, the length-diameter ratio is 30, the rotating speed of the screw is set to be 20r/min, the melt pressure is 15MPa, and the melt temperature is 180 ℃;
directly pushing the blended melt by a first-stage extruder, setting the temperature of three sections to be 170 ℃, the temperature of a heat exchanger and a melt pump to be 180 ℃, the temperature of a die head to be 170 ℃, the temperature of an outer lip of a port die to be 120 ℃, the temperature of an inner lip of the port die to be 115 ℃ and the pressure of the port die to be 5Mpa; gasifying a physical foaming agent in the blended melt through the decompression action of an annular die to form a uniform cell structure in the blended melt, forming a tubular fused blank, and continuously conveying the tubular fused blank to a cooling and shaping system;
4) Temperature control and shaping system: the temperature control shaping system adopts a composite temperature control system consisting of an external air ring temperature control device and an internal circulating oil temperature control device, and the air flow of the external air ring temperature control device is 1m 3 Min, internal circulating oil air ring temperature control device circulating oil flow 1m 3 Min, the diameter of the shaping device is 200mm;
directly pushing the tubular molten blank into a second-stage extruder, and setting the temperature of an air ring to be 15 ℃ and the temperature of circulating oil to be 80 ℃; gradually cooling and shaping the tubular molten blank under the temperature control action of the external air ring temperature control device and the internal circulating oil temperature control device, rapidly crystallizing resin under the action of a nucleating agent, uniformly and stably forming a cellular structure, forming a sheet blank at the temperature of 80 ℃ through online cutting, flattening and static elimination, and continuously conveying the sheet blank to a cooling and winding system;
5) And (3) cooling and winding system:the winding system adopts an air roller cooling and on-line edge cutting and tension control device, and the air flow of the air roller is 1m 3 Min, the traction speed of the main traction device is 50m/min, the winding diameter is 1m, and the winding width is 1.5m;
directly pushing the tubular blank by a temperature control setting system, setting the winding tension to be 200N, cooling by an air roller, cutting edges on line and winding to obtain a finished product of the polypropylene extrusion foaming heat-insulation waterproof membrane material.
Example 3
1) Mixing the components according to the mass ratio
Ethylene/propylene block copolymer: 65 parts of (1);
high crystalline homopolypropylene: 10 parts of (A);
high crystalline copolymerized polypropylene: 10 parts of (A);
talc powder: 0.01 part;
medium density polyethylene: 10 portions of
Lithopone: 1 part;
oleic acid amide: 2 parts of (1);
300, antioxidant: 2 parts of (1);
fully mixing the raw materials by a high-speed mixer to obtain dry-mixed raw materials;
2) First-stage blending extrusion: the first-stage extruder adopts a single-screw extruder with a mixing module, the diameter of a screw is 120mm, the length-diameter ratio is 34, the rotating speed of the screw is set to be 20r/min, the melt pressure is 25MPa, and the melt temperature is 200 ℃;
adding the obtained dry-mixed raw materials into a material device, setting the temperature of a feeding section to be 160 ℃, the temperature of a melting section to be 180 ℃, the temperature of a mixing section to be 220 ℃, the temperature of a homogenizing section to be 220 ℃ and the temperature of a metering section to be 220 ℃; in a first-stage single-screw extruder, dry-mixed raw materials form a blended melt under the actions of melting, shearing and mixing, in the process, a foaming compatilizer is decomposed to release a small amount of gas after reaching the decomposition temperature, the blended melt with a plurality of micro compatibilization cores is formed, 4 parts of helium in a supercritical fluid form is introduced into a melting section, the blended melt is compatible with the compatibilization cores through mixing, a physical foaming agent is fully dispersed in the blended melt to form a state-stable blended melt, the melt is metered after further homogenization and stabilization, and the blended melt is continuously conveyed to a second-stage extruder;
3) Second-stage molding extrusion: the second-stage extruder adopts a single screw extruder with the tail end connected with a heat exchanger and a melt pump, the diameter of a screw is 150mm, the length-diameter ratio is 32, the rotating speed of the screw is set to be 20r/min, the melt pressure is 20MPa, and the melt temperature is 180 ℃;
directly pushing the blended melt by a first-stage extruder, setting the temperature of three sections to be 170 ℃, the temperature of a heat exchanger and a melt pump to be 180 ℃, the temperature of a die head to be 170 ℃, the temperature of an outer lip of a port die to be 120 ℃, the temperature of an inner lip of the port die to be 115 ℃ and the pressure of the port die to be 10Mpa; gasifying a physical foaming agent in the blended melt through the decompression action of an annular neck mold to form a uniform cellular structure inside the blended melt, forming a tubular molten blank, and continuously conveying the tubular molten blank to a cooling and shaping system;
4) Temperature control and shaping system: the temperature control shaping system adopts a composite temperature control system consisting of an external air ring temperature control device and an internal circulating oil temperature control device, and the air flow of the external air ring temperature control device is 2m 3 Permin, internal circulating oil air ring temperature control device circulating oil flow 2m 3 Min, the diameter of the shaping device is 500mm;
directly pushing the tubular molten blank into a second-stage extruder, and setting the temperature of an air ring to be 20 ℃ and the temperature of circulating oil to be 80 ℃; gradually cooling and shaping the tubular molten blank under the temperature control action of the external air ring temperature control device and the internal circulating oil temperature control device, rapidly crystallizing resin under the action of a nucleating agent, uniformly and stably forming a cellular structure, forming a sheet blank at the temperature of 80 ℃ through online cutting, flattening and static elimination, and continuously conveying the sheet blank to a cooling and winding system;
5) And (3) cooling and winding system: the winding system adopts an air roller cooling and on-line edge cutting and tension control device, and the air flow of the air roller is 2m 3 Min, the traction speed of the main traction device is 100m/min, the winding diameter is 1m, and the winding width is 1m;
directly pushing the tubular blank material by a temperature control setting system, setting the winding tension to be 500N, cooling by an air roller, cutting edges and winding on line to obtain a finished product of the polypropylene extrusion foaming heat-insulation waterproof membrane material.
Example 4
1) Mixing the components according to the mass ratio
Long chain branched polypropylene: 45 parts of (1);
ethylene/propylene copolymerized thermoplastic elastomer: 10 parts of a binder;
high crystalline homo-polypropylene: 30 parts of (1);
impact-resistant copolymerized polypropylene: 10 parts of (A);
aluminum benzoate: 1 part;
high density polyethylene: 0.1 part
Carbon black: 0.01 part;
calcium stearate: 2 parts of a mixture;
antioxidant 168:2 parts of a mixture;
fully mixing the raw materials by a high-speed mixer to obtain dry-mixed raw materials;
2) First-stage blending extrusion: the first-stage extruder adopts a single-screw extruder with a mixing module, the diameter of a screw is 150mm, the length-diameter ratio is 36, the rotating speed of the screw is set to be 25r/min, the melt pressure is 30MPa, and the melt temperature is 220 ℃;
adding the obtained dry-mixed raw materials into a material feeding device, setting the temperature of a feeding section to be 180 ℃, setting the temperature of a melting section to be 200 ℃, setting the temperature of a mixing section to be 240 ℃, setting the temperature of a homogenizing section to be 240 ℃, and setting the temperature of a metering section to be 240 ℃; in a first-stage single-screw extruder, dry-mixed raw materials form a blended melt under the actions of melting, shearing and mixing, in the process, a foaming compatilizer is decomposed to release a small amount of gas after reaching the decomposition temperature, the blended melt with a plurality of micro compatibilization cores is formed, 5 parts of argon in a supercritical fluid form is introduced into a melting section, the compatibility with the compatibilization cores is realized through mixing, a physical foaming agent is fully dispersed in the blended melt to form a state-stable blended melt, the melt is metered after further homogenization and stabilization, and the blended melt is continuously conveyed to a second-stage extruder;
3) Second-stage molding extrusion: the second-stage extruder adopts a single-screw extruder with the tail end connected with a heat exchanger and a melt pump, the diameter of a screw is 200mm, the length-diameter ratio is 34, the rotating speed of the screw is set to be 25r/min, the melt pressure is 25MPa, and the melt temperature is 200 ℃;
directly pushing the blended melt by a first-stage extruder, setting the temperature of three sections to be 200 ℃, the temperature of a heat exchanger and a melt pump to be 190 ℃, the temperature of a die head to be 180 ℃, the temperature of an outer lip of a port die to be 130 ℃, the temperature of an inner lip of the port die to be 125 ℃ and the pressure of the port die to be 20Mpa; gasifying a physical foaming agent in the blended melt through the decompression action of an annular neck mold to form a uniform cellular structure inside the blended melt, forming a tubular molten blank, and continuously conveying the tubular molten blank to a cooling and shaping system;
4) Temperature control and shaping system: the temperature control shaping system adopts a composite temperature control system consisting of an external air ring temperature control device and an internal circulating oil temperature control device, and the air flow of the external air ring temperature control device is 3m 3 Permin, internal circulating oil air ring temperature control device circulating oil flow 2m 3 Min, the diameter of the shaping device is 800mm;
directly pushing the tubular molten blank into a second-stage extruder, setting the temperature of an air ring to be 25 ℃ and the temperature of circulating oil to be 100 ℃; gradually cooling and shaping the tubular molten blank under the temperature control action of the external air ring temperature control device and the internal circulating oil temperature control device, rapidly crystallizing resin under the action of a nucleating agent, uniformly and stably forming a cellular structure, forming a sheet blank at the temperature of 100 ℃ through online cutting, flattening and static elimination, and continuously conveying the sheet blank to a cooling and winding system;
5) And (3) cooling and winding system: the winding system adopts an air roller cooling and on-line edge cutting and tension control device, and the air flow of the air roller is 3m 3 The traction speed of the main traction device is 300m/min, the winding diameter is 2m, and the winding width is 1m;
directly pushing the tubular blank by a temperature control setting system, setting the winding tension to be 700N, cooling by an air roller, cutting edges on line and winding to obtain a finished product of the polypropylene extrusion foaming heat-insulation waterproof membrane material.
Example 5
1) Mixing the components according to the mass ratio
Micro-crosslinked polypropylene: 25 parts of a binder;
ethylene/propylene copolymerized thermoplastic elastomer: 20 parts of (1);
high crystalline copolymerized polypropylene: 30 parts of (1);
impact-resistant copolymerized polypropylene: 15 parts of (1);
aluminum tert-butyl benzoate: 2 parts of (1);
ethylene-vinyl alcohol copolymer: 5 portions of
Black iron oxide: 1 part;
zinc stearate: 1 part;
antioxidant 1076:1 part;
fully mixing the raw materials by a high-speed mixer to obtain dry-mixed raw materials;
2) First-stage blending extrusion: the first-stage extruder adopts a single screw extruder with a mixing module, the diameter of the screw is 60mm, the length-diameter ratio is 28, the rotating speed of the screw is set to be 15r/min, the melt pressure is 15MPa, and the melt temperature is 180 ℃;
adding the obtained dry-mixed raw materials into a material feeding device, setting the temperature of a feeding section to be 150 ℃, the temperature of a melting section to be 170 ℃, the temperature of a mixing section to be 200 ℃, the temperature of a homogenizing section to be 200 ℃ and the temperature of a metering section to be 200 ℃; in a first-stage single-screw extruder, dry-mixed raw materials form a blended melt under the actions of melting, shearing and mixing, in the process, a foaming compatilizer is decomposed to release a small amount of gas after reaching the decomposition temperature, so that the blended melt with a plurality of tiny capacity-increasing cores is formed, 7 parts of pentane in the form of a supercritical fluid is introduced into the melting section, the pentane is compatible with the capacity-increasing cores through mixing, so that a physical foaming agent is fully dispersed in the blended melt to form a state-stable blended melt, the melt is metered after further homogenization and stabilization, and the melt is continuously conveyed to a second-stage extruder;
3) Second-stage molding extrusion: the second-stage extruder adopts a single screw extruder with the tail end connected with a heat exchanger and a melt pump, the diameter of the screw is 90mm, the length-diameter ratio is 26-34, the rotating speed of the screw is set to be 15r/min, the melt pressure is 10MPa, and the melt temperature is 160 ℃;
directly pushing the blended melt into a first-stage extruder, setting the temperature of three sections to be 160 ℃, the temperature of a heat exchanger and a melt pump to be 170 ℃, the temperature of a die head to be 160 ℃, the temperature of an outer lip of a neck ring die to be 110 ℃, the temperature of an inner lip of the neck ring die to be 105 ℃ and the pressure of the neck ring die to be 0.1Mpa; gasifying a physical foaming agent in the blended melt through the decompression action of an annular die to form a uniform cell structure in the blended melt, forming a tubular fused blank, and continuously conveying the tubular fused blank to a cooling and shaping system;
4) Temperature control shaping systemThe method comprises the following steps: the temperature control shaping system adopts a composite temperature control system consisting of an external air ring temperature control device and an internal circulating oil temperature control device, and the air flow of the external air ring temperature control device is 0.1m 3 Permin, internal circulating oil air ring temperature control device circulating oil flow rate of 0.01m 3 Min, the diameter of the shaping device is 100mm;
directly pushing the tubular molten blank into a second-stage extruder, and setting the temperature of a wind ring to be 10 ℃ and the temperature of circulating oil to be 70 ℃; gradually cooling and shaping the tubular molten blank under the temperature control action of an external air ring temperature control device and an internal circulating oil temperature control device, rapidly crystallizing the resin under the action of a nucleating agent, uniformly and stably forming a foam pore structure, forming a sheet blank material with the temperature of 70 ℃ through online cutting, flattening and static elimination, and continuously conveying the sheet blank material to a cooling and winding system;
5) A cooling and winding system: the winding system adopts an air roller cooling and on-line edge cutting and tension control device, and the air flow of the air roller is 0.1m 3 Min, the traction speed of the main traction device is 500m/min, the winding diameter is 0.5m, and the winding width is 1m;
directly pushing the tubular blank material by a temperature control setting system, setting the winding tension to be 100N, cooling by an air roller, cutting edges and winding on line to obtain a finished product of the polypropylene extrusion foaming heat-insulation waterproof membrane material.
Example 6
1) Mixing the components according to the mass ratio
Ethylene/propylene block copolymer: 25 parts of (1);
ethylene/propylene copolymerized thermoplastic elastomer: 20 parts of a binder;
high crystalline homo-polypropylene: 40 parts of a binder;
methylene bis (2,4-ditert-butylphenoxy) sodium phosphate: 1 part;
ethylene-acrylic acid copolymer: 10 portions of
Copper chromium black: 2 parts of (1);
high-boiling-point paraffin: 1 part;
antioxidant 1010:1 part;
fully mixing the raw materials by a high-speed mixer to obtain dry-mixed raw materials;
2) First-stage blending extrusion: the first-stage extruder adopts a single screw extruder with a mixing module, the diameter of the screw is 90mm, the length-diameter ratio is 32, the rotating speed of the screw is set to be 20r/min, the melt pressure is 20MPa, and the melt temperature is 200 ℃;
adding the obtained dry-mixed raw materials into a material device, setting the temperature of a feeding section to be 160 ℃, the temperature of a melting section to be 180 ℃, the temperature of a mixing section to be 220 ℃, the temperature of a homogenizing section to be 220 ℃ and the temperature of a metering section to be 220 ℃; in a first-stage single-screw extruder, dry-mixed raw materials form a blended melt under the actions of melting, shearing and mixing, in the process, a foaming compatilizer is decomposed to release a small amount of gas after reaching the decomposition temperature, the blended melt with a plurality of tiny capacity-increasing cores is formed, 5 parts of butane in a supercritical fluid form is introduced into a melting section, the blended melt is compatible with the capacity-increasing cores through mixing, a physical foaming agent is fully dispersed in the blended melt to form a stable blended melt, the melt is metered after further homogenization and stabilization, and the melt is continuously conveyed to a second-stage extruder;
3) Second-stage molding extrusion: the second-stage extruder adopts a single screw extruder with the tail end connected with a heat exchanger and a melt pump, the diameter of a screw is 120mm, the length-diameter ratio is 30, the rotating speed of the screw is set to be 20r/min, the melt pressure is 15MPa, and the melt temperature is 180 ℃;
directly pushing the blended melt by a first-stage extruder, setting the temperature of three sections to be 170 ℃, the temperature of a heat exchanger and a melt pump to be 180 ℃, the temperature of a die head to be 170 ℃, the temperature of an outer lip of a neck ring die to be 120 ℃, the temperature of an inner lip of the neck ring die to be 115 ℃ and the pressure of the neck ring die to be 10Mpa; gasifying a physical foaming agent in the blended melt through the decompression action of an annular neck mold to form a uniform cellular structure inside the blended melt, forming a tubular molten blank, and continuously conveying the tubular molten blank to a cooling and shaping system;
4) Temperature control and shaping system: the temperature control shaping system adopts a composite temperature control system consisting of an external air ring temperature control device and an internal circulating oil temperature control device, and the air flow of the external air ring temperature control device is 1m 3 Min, internal circulating oil air ring temperature control device circulating oil flow 1m 3 Min, the diameter of the shaping device is 200mm;
directly pushing the tubular molten blank into a second-stage extruder, and setting the temperature of an air ring to be 15 ℃ and the temperature of circulating oil to be 80 ℃; the tubular molten blank is gradually cooled and shaped under the temperature control action of an external air ring temperature control device and an internal circulating oil temperature control device, the resin is rapidly crystallized under the action of a nucleating agent, the structure of a foam hole is uniform and stable, and a sheet blank material with the temperature of 80 ℃ is formed through online cutting, flattening and static elimination and is continuously conveyed to a cooling and winding system;
5) And (3) cooling and winding system: the winding system adopts an air roller cooling and on-line edge cutting and tension control device, and the air flow of the air roller is 0.1m 3 Min, the traction speed of the main traction device is 300m/min, the winding diameter is 1m, and the winding width is 1m;
directly pushing the tubular blank by a temperature control setting system, setting the winding tension to be 300N, cooling by an air roller, cutting edges on line and winding to obtain a finished product of the polypropylene extrusion foaming heat-insulation waterproof membrane material.
Example 7
1) Mixing the components according to the mass ratio
Long chain branched polypropylene: 55 parts of (1);
ethylene propylene rubber: 5 parts of a mixture;
high crystalline copolymerized polypropylene: 30 parts of (1);
methylenebis (2,4-di-tert-butylphenoxy) aluminophosphate: 1 part;
low density polyethylene: 3 portions of
Linear low density polyethylene: 2 portions of
Iron chromium black: 2 parts of (1);
microcrystalline paraffin: 2 parts of (1);
300, antioxidant: 0.01 part;
fully mixing the raw materials by a high-speed mixer to obtain dry-mixed raw materials;
2) First-stage blending extrusion: the first-stage extruder adopts a single-screw extruder with a mixing module, the diameter of a screw is 120mm, the length-diameter ratio is 34, the rotating speed of the screw is set to be 20r/min, the melt pressure is 25MPa, and the melt temperature is 200 ℃;
adding the obtained dry-mixed raw materials into a material feeding device, setting the temperature of a feeding section to be 160 ℃, setting the temperature of a melting section to be 180 ℃, setting the temperature of a mixing section to be 220 ℃, setting the temperature of a homogenizing section to be 220 ℃, and setting the temperature of a metering section to be 220 ℃; in a first-stage single-screw extruder, dry-mixed raw materials form a blended melt under the actions of melting, shearing and mixing, in the process, a foaming compatilizer is decomposed to release a small amount of gas after reaching the decomposition temperature, the blended melt with a plurality of micro compatibilization cores is formed, 4 parts of supercritical fluid carbon dioxide is introduced into a melting section, the compatibility with the compatibilization cores is realized through mixing, a physical foaming agent is fully dispersed in the blended melt to form a state-stable blended melt, the melt is metered after further homogenization and stabilization, and the blended melt is continuously conveyed to a second-stage extruder;
3) Second-stage molding extrusion: the second-stage extruder adopts a single screw extruder with the tail end connected with a heat exchanger and a melt pump, the diameter of a screw is 150mm, the length-diameter ratio is 32, the rotating speed of the screw is set to be 20r/min, the melt pressure is 20MPa, and the melt temperature is 180 ℃;
directly pushing the blended melt by a first-stage extruder, setting the temperature of three sections to be 170 ℃, the temperature of a heat exchanger and a melt pump to be 180 ℃, the temperature of a die head to be 170 ℃, the temperature of an outer lip of a port die to be 120 ℃, the temperature of an inner lip of the port die to be 115 ℃ and the pressure of the port die to be 15Mpa; gasifying a physical foaming agent in the blended melt through the decompression action of an annular neck mold to form a uniform cellular structure inside the blended melt, forming a tubular molten blank, and continuously conveying the tubular molten blank to a cooling and shaping system;
4) A temperature control setting system: the temperature control shaping system adopts a composite temperature control system consisting of an external air ring temperature control device and an internal circulating oil temperature control device, and the air flow of the external air ring temperature control device is 2m 3 Min, internal circulating oil air ring temperature control device circulating oil flow 1m 3 Min, the diameter of the shaping device is 500mm;
directly pushing the tubular molten blank into a second-stage extruder, and setting the temperature of a wind ring to be 20 ℃ and the temperature of circulating oil to be 80 ℃; gradually cooling and shaping the tubular molten blank under the temperature control action of the external air ring temperature control device and the internal circulating oil temperature control device, rapidly crystallizing resin under the action of a nucleating agent, uniformly and stably forming a cellular structure, forming a sheet blank at the temperature of 80 ℃ through online cutting, flattening and static elimination, and continuously conveying the sheet blank to a cooling and winding system;
5) A cooling and winding system: the winding system adopts an air roller for cooling, online edge cutting and tensionControl device, air flow of air roller is 0.1-3 m 3 Min, the traction speed of the main traction device is 100m/min, the winding diameter is 1m, and the winding width is 1m;
and (3) directly pushing the tubular blank by a temperature control setting system, setting the winding tension to be 500N, cooling by an air roller, cutting edges on line and winding to obtain a finished product of the polypropylene extrusion foaming heat-insulation waterproof membrane material.
Example 8
1) Mixing the components according to the mass ratio
Long chain branched polypropylene: 35 parts of a binder;
micro-crosslinked polypropylene: 30 parts of a binder;
high crystalline homo-polypropylene: 15 parts of (1);
high crystalline copolymerized polypropylene: 10 parts of (A);
polyvinyl cyclohexane: 0.01 part;
linear low density polyethylene: 5 portions of
Medium density polyethylene: 5 portions of
Cobalt black: 0.01 part;
fatty acid: 0.01 part;
antioxidant 168:0.01 part;
fully mixing the raw materials by a high-speed mixer to obtain dry-mixed raw materials;
2) First-stage blending extrusion: the first-stage extruder adopts a single screw extruder with a mixing module, the diameter of the screw is 150mm, the length-diameter ratio is 36, the rotating speed of the screw is set to be 25r/min, the melt pressure is 30MPa, and the melt temperature is 220 ℃;
adding the obtained dry-mixed raw materials into a material feeding device, setting the temperature of a feeding section to be 180 ℃, setting the temperature of a melting section to be 200 ℃, setting the temperature of a mixing section to be 240 ℃, setting the temperature of a homogenizing section to be 240 ℃, and setting the temperature of a metering section to be 240 ℃; in a first-stage single-screw extruder, dry-mixed raw materials form a blended melt under the actions of melting, shearing and mixing, in the process, a foaming compatilizer is decomposed to release a small amount of gas after reaching the decomposition temperature, so that the blended melt with a plurality of micro compatibilization cores is formed, 2 parts of nitrogen and 1 part of helium in the form of supercritical fluid are introduced into a melting section, the blended melt is compatible with the compatibilization cores through mixing, so that a physical foaming agent is fully dispersed in the blended melt to form a state-stable blended melt, the melt is metered after further homogenization and stabilization, and the blended melt is continuously conveyed to a second-stage extruder;
3) Second-stage molding extrusion: the second-stage extruder adopts a single-screw extruder with the tail end connected with a heat exchanger and a melt pump, the diameter of a screw is 200mm, the length-diameter ratio is 34, the rotating speed of the screw is set to be 25r/min, the melt pressure is 25MPa, and the melt temperature is 200 ℃;
directly pushing the blended melt by a first-stage extruder, setting the temperature of three sections to be 200 ℃, the temperature of a heat exchanger and a melt pump to be 190 ℃, the temperature of a die head to be 180 ℃, the temperature of an outer lip of a port die to be 130 ℃, the temperature of an inner lip of the port die to be 125 ℃ and the pressure of the port die to be 20Mpa; gasifying a physical foaming agent in the blended melt through the decompression action of an annular die to form a uniform cell structure in the blended melt, forming a tubular fused blank, and continuously conveying the tubular fused blank to a cooling and shaping system;
4) A temperature control setting system: the temperature control shaping system adopts a composite temperature control system consisting of an external air ring temperature control device and an internal circulating oil temperature control device, and the air flow of the external air ring temperature control device is 3m 3 Permin, internal circulating oil air ring temperature control device circulating oil flow 2m 3 Min, the diameter of the shaping device is 800mm;
directly pushing the tubular molten blank into a second-stage extruder, setting the temperature of an air ring to be 25 ℃ and the temperature of circulating oil to be 100 ℃; gradually cooling and shaping the tubular molten blank under the temperature control action of the external air ring temperature control device and the internal circulating oil temperature control device, rapidly crystallizing resin under the action of a nucleating agent, uniformly and stably forming a cellular structure, forming a sheet blank at the temperature of 100 ℃ through online cutting, flattening and static elimination, and continuously conveying the sheet blank to a cooling and winding system;
5) And (3) cooling and winding system: the winding system adopts an air roller cooling and on-line edge cutting and tension control device, and the air flow of the air roller is 3m 3 Min, the traction speed of the main traction device is 50m/min, the winding diameter is 2m, and the winding width is 2m;
directly pushing the tubular blank by a temperature control setting system, setting the winding tension to be 700N, cooling by an air roller, cutting edges on line and winding to obtain a finished product of the polypropylene extrusion foaming heat-insulation waterproof membrane material.
Example 9
1) Mixing the components according to the mass ratio
Long chain branched polypropylene: 45 parts of (1);
ethylene/propylene copolymerized thermoplastic elastomer: 25 parts of (1);
ethylene propylene rubber: 5 parts of a mixture;
high crystalline homopolypropylene: 10 parts of (A);
impact-resistant copolymerized polypropylene: 5 parts of a mixture;
ethylene/acrylate copolymer: 1 part;
low density polyethylene: 5 portions of
Nigrosine: 1 part;
calcium stearate: 1 part;
zinc stearate: 1 part;
antioxidant 1076:1 part;
fully mixing the raw materials by a high-speed mixer to obtain dry-mixed raw materials;
2) First-stage blending extrusion: the first-stage extruder adopts a single screw extruder with a mixing module, the diameter of the screw is 60mm, the length-diameter ratio is 28, the rotating speed of the screw is set to be 15r/min, the melt pressure is 15MPa, and the melt temperature is 180 ℃;
adding the obtained dry-mixed raw materials into a material feeding device, setting the temperature of a feeding section to be 150 ℃, the temperature of a melting section to be 170 ℃, the temperature of a mixing section to be 200 ℃, the temperature of a homogenizing section to be 200 ℃ and the temperature of a metering section to be 200 ℃; in a first-stage single-screw extruder, dry-mixed raw materials form a blended melt under the actions of melting, shearing and mixing, in the process, a foaming compatilizer is decomposed to release a small amount of gas after reaching the decomposition temperature, so that the blended melt with a plurality of micro-compatibilization cores is formed, 3 parts of supercritical fluid carbon dioxide are introduced into the melting section, the blended melt is compatible with the compatibilization cores through mixing, so that a physical foaming agent is fully dispersed in the blended melt to form a stable blended melt, the blended melt is further homogenized and stabilized, then the melt is metered, and is continuously conveyed to a second-stage extruder;
3) Second-stage molding extrusion: the second-stage extruder adopts a single screw extruder with the tail end connected with a heat exchanger and a melt pump, the diameter of the screw is 90mm, the length-diameter ratio is 26-34, the rotating speed of the screw is set to be 15r/min, the melt pressure is 10MPa, and the melt temperature is 160 ℃;
directly pushing the blended melt by a first-stage extruder, setting the temperature of three sections to be 160 ℃, the temperature of a heat exchanger and a melt pump to be 170 ℃, the temperature of a die head to be 160 ℃, the temperature of an outer lip of a neck ring die to be 110 ℃, the temperature of an inner lip of the neck ring die to be 105 ℃ and the pressure of the neck ring die to be 0.1Mpa; gasifying a physical foaming agent in the blended melt through the decompression action of an annular die to form a uniform cell structure in the blended melt, forming a tubular fused blank, and continuously conveying the tubular fused blank to a cooling and shaping system;
4) A temperature control setting system: the temperature control shaping system adopts a composite temperature control system consisting of an external air ring temperature control device and an internal circulating oil temperature control device, and the air flow of the external air ring temperature control device is 0.1m 3 Min, internal circulating oil air ring temperature control device circulating oil flow rate of 0.01m 3 Min, the diameter of the shaping device is 100mm;
directly pushing the tubular molten blank into a second-stage extruder, setting the temperature of an air ring to be 10 ℃ and the temperature of circulating oil to be 70 ℃; gradually cooling and shaping the tubular molten blank under the temperature control action of the external air ring temperature control device and the internal circulating oil temperature control device, rapidly crystallizing resin under the action of a nucleating agent, uniformly and stably forming a cellular structure, forming a sheet blank at the temperature of 70 ℃ through online cutting, flattening and static elimination, and continuously conveying the sheet blank to a cooling and winding system;
5) And (3) cooling and winding system: the winding system adopts an air roller cooling and on-line edge cutting and tension control device, and the air flow of the air roller is 0.1m 3 Min, the traction speed of the main traction device is 500m/min, the winding diameter is 0.5m, and the winding width is 1m;
directly pushing the tubular blank material by a temperature control setting system, setting the winding tension to be 100N, cooling by an air roller, cutting edges and winding on line to obtain a finished product of the polypropylene extrusion foaming heat-insulation waterproof membrane material.
Example 10
1) Mixing the components according to the mass ratio
Long chain branched polypropylene: 65 parts of (1);
ethylene/propylene block copolymer: 20 parts of (1);
high crystalline copolymerized polypropylene: 3 parts of a mixture;
impact-resistant copolymerized polypropylene: 2 parts of a mixture;
sorbitol: 2 parts of a mixture;
high density polyethylene: 5 portions of
Antimony sulfide: 0.01 part;
high-boiling-point paraffin: 1 part;
calcium stearate: 1 part;
antioxidant 1010:1 part;
fully mixing the raw materials by a high-speed mixer to obtain dry-mixed raw materials;
2) First-stage blending extrusion: the first-stage extruder adopts a single screw extruder with a mixing module, the diameter of the screw is 90mm, the length-diameter ratio is 32, the rotating speed of the screw is set to be 20r/min, the melt pressure is 20MPa, and the melt temperature is 200 ℃;
adding the obtained dry-mixed raw materials into a material device, setting the temperature of a feeding section to be 160 ℃, the temperature of a melting section to be 180 ℃, the temperature of a mixing section to be 220 ℃, the temperature of a homogenizing section to be 220 ℃ and the temperature of a metering section to be 220 ℃; in a first-stage single-screw extruder, dry-mixed raw materials form a blended melt under the actions of melting, shearing and mixing, in the process, a foaming compatilizer is decomposed to release a small amount of gas after reaching the decomposition temperature, so that the blended melt with a plurality of micro compatibilization cores is formed, 1 part of pentane and 1 part of butane in a supercritical fluid form are introduced into a melting section, the blended melt is compatible with the compatibilization cores through mixing, so that a physical foaming agent is fully dispersed in the blended melt to form a state-stable blended melt, the melt is metered after further homogenization and stabilization, and the blended melt is continuously conveyed to a second-stage extruder;
3) Second-stage molding extrusion: the second-stage extruder adopts a single screw extruder with the tail end connected with a heat exchanger and a melt pump, the diameter of a screw is 120mm, the length-diameter ratio is 30, the rotating speed of the screw is set to be 20r/min, the melt pressure is 15MPa, and the melt temperature is 180 ℃;
directly pushing the blended melt by a first-stage extruder, setting the temperature of three sections to be 170 ℃, the temperature of a heat exchanger and a melt pump to be 180 ℃, the temperature of a die head to be 170 ℃, the temperature of an outer lip of a port die to be 120 ℃, the temperature of an inner lip of the port die to be 115 ℃ and the pressure of the port die to be 5Mpa; gasifying a physical foaming agent in the blended melt through the decompression action of an annular die to form a uniform cell structure in the blended melt, forming a tubular fused blank, and continuously conveying the tubular fused blank to a cooling and shaping system;
4) A temperature control setting system: the temperature control shaping system adopts a composite temperature control system consisting of an external air ring temperature control device and an internal circulating oil temperature control device, and the air flow of the external air ring temperature control device is 1m 3 Min, internal circulating oil air ring temperature control device circulating oil flow 1m 3 Min, the diameter of the shaping device is 200mm;
directly pushing the tubular molten blank into a second-stage extruder, and setting the temperature of an air ring to be 15 ℃ and the temperature of circulating oil to be 80 ℃; gradually cooling and shaping the tubular molten blank under the temperature control action of the external air ring temperature control device and the internal circulating oil temperature control device, rapidly crystallizing resin under the action of a nucleating agent, uniformly and stably forming a cellular structure, forming a sheet blank at the temperature of 80 ℃ through online cutting, flattening and static elimination, and continuously conveying the sheet blank to a cooling and winding system;
5) A cooling and winding system: the winding system adopts an air roller cooling and on-line edge cutting and tension control device, and the air flow of the air roller is 1m 3 Min, the traction speed of the main traction device is 50m/min, the winding diameter is 1m, and the winding width is 1.5m;
directly pushing the tubular blank by a temperature control setting system, setting the winding tension to be 200N, cooling by an air roller, cutting edges on line and winding to obtain a finished product of the polypropylene extrusion foaming heat-insulation waterproof membrane material.
While the foregoing is directed to the preferred embodiment of the present invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow.
Claims (10)
1. A polypropylene extrusion foaming heat insulation waterproof membrane material comprises the following components in percentage by mass:
high melt strength polypropylene: 45-85 parts of a solvent;
high crystalline polypropylene: 5-45 parts of a solvent;
nucleating agent: 0.01-2 parts;
wherein the high melt strength polypropylene is one or a mixture of a plurality of long chain branch polypropylene, micro-crosslinked polypropylene, ethylene/propylene block copolymer, ethylene/propylene copolymerized thermoplastic elastomer and ethylene propylene rubber, and the melt strength is 20-70 cN;
the polypropylene extrusion foaming heat insulation waterproof film material has a uniform foam pore structure, the thickness is 2-6 mm, and the apparent density is 30-100 kg/m 3 The expansion ratio is 10 to 30.
2. The polypropylene extrusion foaming heat insulation waterproof film material as claimed in claim 1, wherein: the high-crystalline polypropylene is one or a mixture of more of high-crystalline homo-polypropylene, high-crystalline co-polypropylene and impact-resistant co-polypropylene, the melt strength is 15-20 cN, and the melting temperature is 160-240 ℃.
3. The polypropylene extrusion foaming heat insulation waterproof film material as claimed in claim 1, wherein: the nucleating agent is one or a mixture of more of calcium carbonate, silicon dioxide, talcum powder, aluminum benzoate, tert-butyl aluminum benzoate, methylene bis (2,4-di-tert-butyl phenoxy) sodium phosphate, methylene bis (2,4-di-tert-butyl phenoxy) aluminum phosphate, polyvinyl cyclohexane, ethylene/acrylate copolymer, sorbitol and derivatives.
4. The polypropylene extrusion foaming heat insulation waterproof film material as claimed in claim 1, wherein: the polypropylene extrusion foaming heat insulation waterproof film material also comprises the following components: polyethylene resin: 0.1-10 parts; physical foaming agent: 2-7 parts; colorant: 0.01 to 3 portions; lubricant: 0.01-2 parts; antioxidant: 0.01 to 2 portions.
5. The polypropylene extrusion foaming heat insulation waterproof film material as claimed in claim 4, wherein: the colorant is one or a mixture of more of titanium dioxide, zinc oxide, lithopone, carbon black, iron oxide black, copper chromium black, iron chromium black, cobalt black, aniline black, antimony sulfide and derivatives.
6. The polypropylene extrusion foaming heat insulation waterproof film material as claimed in claim 4, wherein: the physical foaming agent is one or a mixture of more of carbon dioxide, nitrogen, helium, argon, pentane and butane in a supercritical fluid state.
7. The polypropylene extrusion foaming heat insulation waterproof film material as claimed in claim 4, wherein: the polyethylene resin is one or a mixture of a plurality of low density polyethylene, linear low density polyethylene, medium density polyethylene, high density polyethylene, ethylene-vinyl alcohol copolymer and ethylene-acrylic acid copolymer, the melt strength is 20-40 cN, the melting temperature is 155-195 ℃, and the polydispersity index is 7.0-8.5.
8. The polypropylene extrusion foaming heat insulation waterproof film material as claimed in claim 4, wherein: the lubricant is one or a mixture of more of ethylene bis stearamide, oleamide, calcium stearate, zinc stearate, high boiling paraffin, microcrystalline paraffin and fatty acid.
9. The polypropylene extrusion foaming heat-insulation waterproof film material as claimed in claim 4, wherein: the antioxidant is one or a mixture of more of antioxidant 1076, antioxidant 1010, antioxidant 300 and antioxidant 168.
10. The production method of the polypropylene extrusion foaming heat insulation waterproof film material according to the claims 1 to 9, the process steps are as follows:
1) Fully mixing the components except the physical foaming agent by a high-speed mixer according to the mass ratio to obtain dry-mixed raw materials;
2) First-stage blending extrusion: the first-stage extruder adopts a single screw extruder with a mixing module, the diameter of the screw is 60-150 mm, the length-diameter ratio is 28-36, the rotating speed of the screw is set to be 15-25 r/min, the melt pressure is 15-30 MPa, and the melt temperature is 180-220 ℃;
adding the obtained dry-mixed raw materials into a material feeding device, setting the temperature of a feeding section to be 150-180 ℃, setting the temperature of a melting section to be 170-200 ℃, setting the temperature of a mixing section to be 200-240 ℃, setting the temperature of a homogenizing section to be 200-240 ℃ and setting the temperature of a metering section to be 200-240 ℃; in a first-stage single-screw extruder, dry-mixed raw materials form a blended melt under the actions of melting, shearing and mixing, in the process, a foaming compatilizer is decomposed to release a small amount of gas after reaching the decomposition temperature, the blended melt with a plurality of tiny compatibilization cores is formed, a supercritical fluid type physical foaming agent is introduced into the melting section, the physical foaming agent is compatible with the compatibilization cores through mixing, the physical foaming agent is fully dispersed in the blended melt to form a state stable blended melt, the melt is metered after further homogenization and stabilization, and the melt is continuously conveyed to a second-stage extruder;
3) Second-stage molding extrusion: the second-stage extruder adopts a single screw extruder with the tail end connected with a heat exchanger and a melt pump, the diameter of the screw is 90-200 mm, the length-diameter ratio is 26-34, the rotating speed of the screw is set to be 15-25 r/min, the melt pressure is 10-25 MPa, and the melt temperature is 160-200 ℃;
directly pushing the blended melt into a first-stage extruder, setting the temperature of three sections to be 160-200 ℃, the temperature of a heat exchanger and a melt pump to be 170-190 ℃, the temperature of a die head to be 160-180 ℃, the temperature of an outer lip of a neck ring die to be 110-130 ℃, the temperature of an inner lip of the neck ring die to be 105-125 ℃ and the pressure of the neck ring die to be 0.1-20 Mpa; gasifying a physical foaming agent in the blended melt through the decompression action of an annular die to form a uniform cell structure in the blended melt, forming a tubular fused blank, and continuously conveying the tubular fused blank to a cooling and shaping system;
4) A temperature control setting system: the temperature control shaping system adopts a composite temperature control system consisting of an external air ring temperature control device and an internal circulating oil temperature control device, and the air flow of the external air ring temperature control device is 0.1-3 m 3 The flow rate of circulating oil of the internal circulating oil air ring temperature control device is 0.01-2 m3/min, and the diameter of the shaping device is 100-800 mm;
directly pushing the tubular molten blank into a second-stage extruder, setting the temperature of an air ring to be 10-25 ℃ and the temperature of circulating oil to be 70-100 ℃; gradually cooling and shaping the tubular molten blank under the temperature control action of the external air ring temperature control device and the internal circulating oil temperature control device, rapidly crystallizing resin under the action of a nucleating agent, uniformly and stably forming a cellular structure, forming a sheet blank at the temperature of 70-100 ℃ through online cutting, flattening and static elimination, and continuously conveying the sheet blank to a cooling and winding system;
5) And (3) cooling and winding system: the winding system adopts an air roller cooling and on-line edge cutting and tension control device, and the air flow of the air roller is 0.1-3 m 3 The traction speed of the main traction device is 5-500 m/min, the rolling diameter is 0.5-2 m, and the rolling width is 1-2 m;
directly pushing the tubular blank by a temperature control setting system, setting the winding tension to be 100-700N, cooling by an air roller, cutting edges on line and winding to obtain a finished product of the polypropylene extrusion foaming heat-insulation waterproof membrane material.
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