CN115214172A - Low-resistance high-wear-resistance temperature-resistant light conveying belt and manufacturing method thereof - Google Patents
Low-resistance high-wear-resistance temperature-resistant light conveying belt and manufacturing method thereof Download PDFInfo
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- CN115214172A CN115214172A CN202210722434.7A CN202210722434A CN115214172A CN 115214172 A CN115214172 A CN 115214172A CN 202210722434 A CN202210722434 A CN 202210722434A CN 115214172 A CN115214172 A CN 115214172A
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- 238000004519 manufacturing process Methods 0.000 title abstract description 5
- 239000010410 layer Substances 0.000 claims abstract description 167
- 239000011248 coating agent Substances 0.000 claims abstract description 107
- 238000000576 coating method Methods 0.000 claims abstract description 107
- 239000004952 Polyamide Substances 0.000 claims abstract description 62
- 229920002647 polyamide Polymers 0.000 claims abstract description 62
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 57
- 239000004744 fabric Substances 0.000 claims abstract description 53
- 239000000853 adhesive Substances 0.000 claims abstract description 52
- 230000001070 adhesive effect Effects 0.000 claims abstract description 52
- 239000012790 adhesive layer Substances 0.000 claims abstract description 52
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 25
- 239000002105 nanoparticle Substances 0.000 claims abstract description 24
- 239000004814 polyurethane Substances 0.000 claims abstract description 21
- 229920002635 polyurethane Polymers 0.000 claims abstract description 21
- GEYOCULIXLDCMW-UHFFFAOYSA-N 1,2-phenylenediamine Chemical compound NC1=CC=CC=C1N GEYOCULIXLDCMW-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000000178 monomer Substances 0.000 claims abstract description 15
- 229920001971 elastomer Polymers 0.000 claims description 107
- 239000005060 rubber Substances 0.000 claims description 107
- 239000000243 solution Substances 0.000 claims description 41
- 238000003756 stirring Methods 0.000 claims description 41
- QGJOPFRUJISHPQ-UHFFFAOYSA-N Carbon disulfide Chemical compound S=C=S QGJOPFRUJISHPQ-UHFFFAOYSA-N 0.000 claims description 39
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 33
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 33
- 238000004073 vulcanization Methods 0.000 claims description 30
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 27
- 239000000203 mixture Substances 0.000 claims description 26
- 238000007599 discharging Methods 0.000 claims description 25
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 claims description 24
- 239000006229 carbon black Substances 0.000 claims description 24
- 239000004568 cement Substances 0.000 claims description 24
- 239000003795 chemical substances by application Substances 0.000 claims description 21
- 238000001816 cooling Methods 0.000 claims description 21
- 229920000459 Nitrile rubber Polymers 0.000 claims description 20
- KKEYFWRCBNTPAC-UHFFFAOYSA-N Terephthalic acid Chemical compound OC(=O)C1=CC=C(C(O)=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-N 0.000 claims description 20
- 238000010438 heat treatment Methods 0.000 claims description 20
- NAQMVNRVTILPCV-UHFFFAOYSA-N hexane-1,6-diamine Chemical compound NCCCCCCN NAQMVNRVTILPCV-UHFFFAOYSA-N 0.000 claims description 20
- 239000002904 solvent Substances 0.000 claims description 20
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 16
- WERYXYBDKMZEQL-UHFFFAOYSA-N butane-1,4-diol Chemical compound OCCCCO WERYXYBDKMZEQL-UHFFFAOYSA-N 0.000 claims description 16
- 150000001875 compounds Chemical class 0.000 claims description 16
- 238000005507 spraying Methods 0.000 claims description 15
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 14
- 238000002360 preparation method Methods 0.000 claims description 14
- 239000002002 slurry Substances 0.000 claims description 14
- OZAIFHULBGXAKX-UHFFFAOYSA-N 2-(2-cyanopropan-2-yldiazenyl)-2-methylpropanenitrile Chemical group N#CC(C)(C)N=NC(C)(C)C#N OZAIFHULBGXAKX-UHFFFAOYSA-N 0.000 claims description 13
- 239000007788 liquid Substances 0.000 claims description 13
- CBCKQZAAMUWICA-UHFFFAOYSA-N 1,4-phenylenediamine Chemical group NC1=CC=C(N)C=C1 CBCKQZAAMUWICA-UHFFFAOYSA-N 0.000 claims description 12
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 claims description 12
- WOWHHFRSBJGXCM-UHFFFAOYSA-M cetyltrimethylammonium chloride Chemical group [Cl-].CCCCCCCCCCCCCCCC[N+](C)(C)C WOWHHFRSBJGXCM-UHFFFAOYSA-M 0.000 claims description 12
- PXJJSXABGXMUSU-UHFFFAOYSA-N disulfur dichloride Chemical group ClSSCl PXJJSXABGXMUSU-UHFFFAOYSA-N 0.000 claims description 12
- 239000000395 magnesium oxide Substances 0.000 claims description 12
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 12
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical group [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 12
- 239000011259 mixed solution Substances 0.000 claims description 12
- 229920002292 Nylon 6 Polymers 0.000 claims description 11
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 claims description 11
- 239000002245 particle Substances 0.000 claims description 11
- RTBFRGCFXZNCOE-UHFFFAOYSA-N 1-methylsulfonylpiperidin-4-one Chemical compound CS(=O)(=O)N1CCC(=O)CC1 RTBFRGCFXZNCOE-UHFFFAOYSA-N 0.000 claims description 10
- FXHOOIRPVKKKFG-UHFFFAOYSA-N N,N-Dimethylacetamide Chemical compound CN(C)C(C)=O FXHOOIRPVKKKFG-UHFFFAOYSA-N 0.000 claims description 10
- JFCQEDHGNNZCLN-UHFFFAOYSA-N anhydrous glutaric acid Natural products OC(=O)CCCC(O)=O JFCQEDHGNNZCLN-UHFFFAOYSA-N 0.000 claims description 10
- 239000004677 Nylon Substances 0.000 claims description 9
- 229920002302 Nylon 6,6 Polymers 0.000 claims description 9
- 238000002156 mixing Methods 0.000 claims description 9
- 229920001778 nylon Polymers 0.000 claims description 9
- 239000004417 polycarbonate Substances 0.000 claims description 9
- PTBDIHRZYDMNKB-UHFFFAOYSA-N 2,2-Bis(hydroxymethyl)propionic acid Chemical compound OCC(C)(CO)C(O)=O PTBDIHRZYDMNKB-UHFFFAOYSA-N 0.000 claims description 8
- KUBDPQJOLOUJRM-UHFFFAOYSA-N 2-(chloromethyl)oxirane;4-[2-(4-hydroxyphenyl)propan-2-yl]phenol Chemical compound ClCC1CO1.C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 KUBDPQJOLOUJRM-UHFFFAOYSA-N 0.000 claims description 8
- 239000005058 Isophorone diisocyanate Substances 0.000 claims description 8
- 239000003963 antioxidant agent Substances 0.000 claims description 8
- 230000003078 antioxidant effect Effects 0.000 claims description 8
- 239000003822 epoxy resin Substances 0.000 claims description 8
- NIMLQBUJDJZYEJ-UHFFFAOYSA-N isophorone diisocyanate Chemical compound CC1(C)CC(N=C=O)CC(C)(CN=C=O)C1 NIMLQBUJDJZYEJ-UHFFFAOYSA-N 0.000 claims description 8
- 229920000515 polycarbonate Polymers 0.000 claims description 8
- 229920000647 polyepoxide Polymers 0.000 claims description 8
- UKLDJPRMSDWDSL-UHFFFAOYSA-L [dibutyl(dodecanoyloxy)stannyl] dodecanoate Chemical group CCCCCCCCCCCC(=O)O[Sn](CCCC)(CCCC)OC(=O)CCCCCCCCCCC UKLDJPRMSDWDSL-UHFFFAOYSA-L 0.000 claims description 7
- -1 alkyl dicarboxymethyl ammonium ethyl lactone Chemical class 0.000 claims description 7
- 239000002216 antistatic agent Substances 0.000 claims description 7
- 238000006243 chemical reaction Methods 0.000 claims description 7
- 239000012975 dibutyltin dilaurate Substances 0.000 claims description 7
- 239000012153 distilled water Substances 0.000 claims description 7
- 238000006116 polymerization reaction Methods 0.000 claims description 7
- 239000011527 polyurethane coating Substances 0.000 claims description 7
- 238000007790 scraping Methods 0.000 claims description 7
- 238000007493 shaping process Methods 0.000 claims description 7
- 239000001488 sodium phosphate Substances 0.000 claims description 7
- RYFMWSXOAZQYPI-UHFFFAOYSA-K trisodium phosphate Chemical group [Na+].[Na+].[Na+].[O-]P([O-])([O-])=O RYFMWSXOAZQYPI-UHFFFAOYSA-K 0.000 claims description 7
- 229910000406 trisodium phosphate Inorganic materials 0.000 claims description 7
- 235000019801 trisodium phosphate Nutrition 0.000 claims description 7
- 239000002518 antifoaming agent Substances 0.000 claims description 6
- 239000002131 composite material Substances 0.000 claims description 6
- AMTWCFIAVKBGOD-UHFFFAOYSA-N dioxosilane;methoxy-dimethyl-trimethylsilyloxysilane Chemical compound O=[Si]=O.CO[Si](C)(C)O[Si](C)(C)C AMTWCFIAVKBGOD-UHFFFAOYSA-N 0.000 claims description 6
- 239000002270 dispersing agent Substances 0.000 claims description 6
- 239000006185 dispersion Substances 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 6
- 238000000227 grinding Methods 0.000 claims description 6
- 239000003960 organic solvent Substances 0.000 claims description 6
- 239000002244 precipitate Substances 0.000 claims description 6
- 239000012744 reinforcing agent Substances 0.000 claims description 6
- 229940083037 simethicone Drugs 0.000 claims description 6
- 238000000638 solvent extraction Methods 0.000 claims description 6
- 238000005406 washing Methods 0.000 claims description 6
- 238000005303 weighing Methods 0.000 claims description 6
- 239000012752 auxiliary agent Substances 0.000 claims description 4
- 239000003054 catalyst Substances 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 230000001376 precipitating effect Effects 0.000 claims description 4
- 238000009987 spinning Methods 0.000 claims description 3
- 230000003712 anti-aging effect Effects 0.000 claims description 2
- 238000000465 moulding Methods 0.000 claims description 2
- NTXGQCSETZTARF-UHFFFAOYSA-N buta-1,3-diene;prop-2-enenitrile Chemical group C=CC=C.C=CC#N NTXGQCSETZTARF-UHFFFAOYSA-N 0.000 claims 1
- 230000017525 heat dissipation Effects 0.000 abstract description 3
- 230000020169 heat generation Effects 0.000 abstract description 3
- 230000000052 comparative effect Effects 0.000 description 11
- 238000012360 testing method Methods 0.000 description 7
- 150000002009 diols Chemical class 0.000 description 6
- 238000009941 weaving Methods 0.000 description 5
- 230000003068 static effect Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 125000000118 dimethyl group Chemical group [H]C([H])([H])* 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 229920002545 silicone oil Polymers 0.000 description 2
- 241000208125 Nicotiana Species 0.000 description 1
- 235000002637 Nicotiana tabacum Nutrition 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D29/00—Producing belts or bands
- B29D29/06—Conveyor belts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G15/00—Conveyors having endless load-conveying surfaces, i.e. belts and like continuous members, to which tractive effort is transmitted by means other than endless driving elements of similar configuration
- B65G15/30—Belts or like endless load-carriers
- B65G15/32—Belts or like endless load-carriers made of rubber or plastics
- B65G15/34—Belts or like endless load-carriers made of rubber or plastics with reinforcing layers, e.g. of fabric
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05F—STATIC ELECTRICITY; NATURALLY-OCCURRING ELECTRICITY
- H05F1/00—Preventing the formation of electrostatic charges
- H05F1/02—Preventing the formation of electrostatic charges by surface treatment
Abstract
The invention provides a low-resistance high-wear-resistance temperature-resistance light conveyor belt and a manufacturing method thereof, wherein a polyamide layer is taken as a central layer of the conveyor belt, an adhesive layer, a fabric layer, a coating adhesive layer, a conductive layer and a wear-resistance low-resistance layer are sequentially covered on two sides of the central layer from inside to outside, and a phenylenediamine monomer is added into the polyamide layer, so that the temperature resistance of the central layer is improved; in the wear-resistant low-resistance layer, the mesoporous silica nanoparticles are added into the modified polyurethane, so that the friction coefficient of a contact interface with the belt body is greatly reduced, the wear-resistant low-resistance layer is more wear-resistant, and the heat generation is low; the coating structure is used for replacing a thicker surface covering adhesive structure, so that the belt body is thinner and lighter, heat dissipation is facilitated, and the heat resistance of the conveying belt is improved.
Description
Technical Field
The invention relates to the technical field of conveying materials, in particular to a low-resistance high-wear-resistance temperature-resistance light conveying belt and a manufacturing method thereof.
Background
The conveyer belt is the essential element of rubber belt conveyor, surpasss the effect of bearing the weight of the material, uses the conveyer belt to compare as transport carrier and other transportation methods and has the operation safety, convenient to use, and the maintenance is easy, and the freight cost is cheap and can realize serialization, shortens advantages such as conveying distance. The light conveyer belt is a fine product in the conveyer belt, and has the advantages of light and thin belt body, good dimensional stability, high tension and bright and fast color. Safety and innocuity; the method is widely applied to industries such as food, medicine, electronics, tobacco, printing, packaging, wood, textile, building materials, traffic, post, logistics and the like; the upper surface transmission layer and the lower surface transmission layer of the conventional light conveyor belt are mostly made of rubber. At some specific transport operating mode, when the interface of the smooth mirror surfaces such as area body direct contact, laminating steel sheet is carried, can cause:
(1) The friction coefficient is greatly increased, the static friction is increased, and the smoothness and the fluency of conveying are influenced;
(2) The rubber of the surface covering layer is accelerated to be aged due to severe heat generation, and the service life of the conveying belt is influenced;
(3) Static buildup increases relatively, causing static hazards and static safety hazards to the conveyed product.
Disclosure of Invention
The invention aims to provide a low-resistance high-wear-resistance temperature-resistant light conveyor belt and a manufacturing method thereof, and aims to solve the problems in the background technology.
In order to solve the technical problems, the invention provides the following technical scheme:
1. the conveyer belt uses a polyamide layer as a central layer, composite layers are symmetrically arranged on two sides of the central layer, and the composite layers sequentially comprise an adhesive layer, a fabric layer, a coating adhesive layer, a conductive layer and a wear-resistant low-resistance layer from inside to outside.
Further, the polyamide layer comprises the following components: according to the mass portion, 1.5 to 2 portions of phenylenediamine monomer, 0.8 to 1.2 portions of hexamethylene diamine, 0.4 to 0.7 portion of glutaric acid, 0.5 to 0.9 portion of terephthalic acid and 92 to 95 portions of N, N-dimethylacetamide.
Further, the adhesive layer comprises the following components: according to the mass portion, 10 to 15 portions of nylon 6 particles, 30 to 45 portions of methanol solvent and 30 to 45 portions of phenol.
Further, the fabric layer is primarily formed by nylon 66 weaving.
Further, the coating adhesive layer comprises the following components: 100 to 105 portions of nitrile rubber crude rubber, 40 to 60 portions of reinforcing agent, 4 to 8 portions of adhesive, 5 to 10 portions of rubber oil, 2 to 4 portions of vulcanization auxiliary agent, 0.5 to 1 portion of vulcanizing agent, 1 to 3 portions of rubber anti-aging agent and 2 to 4 portions of carbon disulfide solvent.
Further, the conductive layer is a nitrile rubber layer, and the conductive layer comprises the following components: 100 to 105 portions of nitrile rubber crude rubber, 20 to 30 portions of carbon black, 5 to 10 portions of antistatic agent, 10 to 15 portions of rubber oil, 1 to 3 portions of vulcanization auxiliary agent, 0.5 to 1.5 portions of vulcanizing agent, 2 to 4 portions of rubber antioxidant and 2 to 4 portions of carbon disulfide solvent.
Further, the wear-resistant low-resistance layer comprises the following components: according to the mass parts, 85-90 parts of modified polyurethane solution, 10-12 parts of mesoporous silica nanoparticles, 5-10 parts of dispersant and 5-10 parts of defoaming agent.
8. A preparation method of a low-resistance high-wear-resistance temperature-resistant light conveyor belt comprises the following specific preparation steps:
(1) Preparation of polyamide layer: dissolving phenylenediamine monomer, hexamethylenediamine, glutaric acid and terephthalic acid in a mixed solution of N, N-dimethylacetamide and water, heating to 180-200 ℃, uniformly mixing to obtain a polyamide solution, prepolymerizing the polyamide solution at 200-250 ℃ for 1-3 h, heating to 280-300 ℃, performing secondary polymerization for 10-15 min, heating to 300-310 ℃ again, vacuumizing, extruding and discharging, and molding by a mold to obtain a polyamide layer;
(2) Preparing an adhesive layer: mixing nylon 6 particles, methanol and phenol, preserving heat for 10-12 hours at 55-60 ℃, cooling, exhausting, discharging, storing at 20-25 ℃ and preparing into adhesive liquid for later use;
(3) Fabric layer preparation: spinning nylon 66 into a nylon fabric, and drafting and shaping to obtain a fabric layer;
(4) Preparing a conductive layer: taking nitrile rubber crude rubber for banburying for 45-60 s, firstly adding half of carbon black for continuously banburying for 2-3 min, adding the rest carbon black, rubber oil, an antistatic agent, a vulcanization aid and a rubber antioxidant for continuously banburying, and discharging at the temperature of 105-107 ℃ to obtain a rubber compound; placing the mixed rubber at 20-25 ℃ for 24h, adding a vulcanizing agent into the mixed rubber, and thinly discharging a sheet, wherein the thickness of the rubber sheet is 1-1.2 mm; adding the mixture into a carbon disulfide solvent, stirring and dissolving to prepare conductive adhesive cement for later use;
(5) Preparing a coating adhesive layer: taking nitrile rubber raw rubber for banburying for 45-60 s, adding a reinforcing agent, continuing banburying for 2-3 min, adding an adhesive, rubber oil, a vulcanization aid and a rubber antioxidant, continuing banburying, and discharging at 105-107 ℃ to obtain a rubber compound; placing the rubber compound for 24h at the temperature of 20-25 ℃, adding a vulcanizing agent into the rubber compound, and thinly passing through a sheet, wherein the thickness of the rubber sheet is 1-1.2 mm; adding the mixture into a carbon disulfide solvent, stirring and dissolving to prepare coating adhesive layer adhesive cement for later use;
(6) Preparing the wear-resistant low-resistance layer coating:
A. preparing a modified polyurethane coating: taking polycarbonate dihydric alcohol, simethicone and isophorone diisocyanate, stirring and heating to 70-75 ℃, adding a catalyst, reacting for 2-3 h, cooling to 45-50 ℃, quickly adding 1,4-butanediol, 2,2-dimethylolpropionic acid and acetone, reacting for 5min, heating to 70-75 ℃, continuing to react for 2-3 h, adding E-44 epoxy resin, reacting for 1.5-2 h at 70-75 ℃, cooling to 50-55 ℃ after the reaction is finished, adding triethylamine, reacting for 30min, adding distilled water, and violently stirring for 0.5-1 h to obtain a modified polyurethane solution;
B. preparing mesoporous silica nanoparticles: taking sodium hydroxide, a template agent, tetraethoxysilane and water, dissolving the sodium hydroxide and the template agent in the water, dropwise adding the tetraethoxysilane at the temperature of 70-90 ℃, stirring and precipitating, washing, centrifuging and drying precipitates, and removing the template agent by utilizing an organic solvent extraction method at the temperature of 60-80 ℃ to obtain mesoporous silica nanoparticles;
C. adding mesoporous silica nanoparticles into ethanol for dispersion, then grinding for 24 hours to prepare slurry, weighing the slurry and a modified polyurethane solution, adding a dispersing agent and a defoaming agent, and ultrasonically stirring for 30 minutes to uniformly mix the components to obtain a wear-resistant low-resistance layer coating;
(7) Preparing a conveying belt: coating the coating adhesive layer on the surface of the fabric layer by scraping, carrying out heat vulcanization to obtain a coating adhesive layer, coating the conductive adhesive slurry on the surface of the coating adhesive layer by scraping, and carrying out vulcanization to obtain a conductive layer; spraying the wear-resistant low-resistance coating on the surface of the conductive layer, and curing at 20-25 ℃ for 40-60 min to obtain a conductive wear-resistant layer of the fabric; and uniformly scraping and coating adhesive liquid on the surface of the polyamide layer, attaching the fabric conductive wear-resistant layer to the two sides of the polyamide layer, and carrying out hot vulcanization to obtain the low-resistance high-wear-resistance temperature-resistant light conveyor belt.
Further, in the step (1), the mass part ratio of the phenylenediamine monomer, the hexamethylene diamine, the glutaric acid, the terephthalic acid, the N, N-dimethylacetamide and the water is as follows: 0.5:1:1:0.6:4:1;
in the step (2), the mass parts of the nylon 6 particles, the methanol and the phenol are as follows: 1:3:3;
in the step (4), the antistatic agent is alkyl dicarboxymethyl ammonium ethyl lactone, the vulcanizing assistant is magnesium oxide, the vulcanizing agent is sulfur monochloride, and the rubber antioxidant is p-phenylenediamine;
further, in the step (5), the adhesive is one or more of an adhesive RA, an adhesive RS or an adhesive RE, and the reinforcing agent is white carbon black; in the step (6), the catalyst is dibutyltin dilaurate, the dispersing agent is trisodium phosphate, the defoaming agent is azobisisobutyronitrile, and the template agent is hexadecyltrimethylammonium chloride.
Further, in the step (7), the working parameters of the hot vulcanization are 120-130 ℃ and 10-12 MPa for 5-6 min.
Further, in the step (3), the nylon fabric has a thickness of 0.3-0.6 mm and a mass of 90-160 g per square meter; in the step (4) and the step (5), the thickness of the rubber sheet is 1-1.2 mm; in the step (7), the coating quantity of the coating adhesive layer is 60-80 g per square meter, the coating quantity of the conductive layer is 30-60 g per square meter, the spraying quantity of the wear-resistant low-resistance layer is 30-50 g per square meter, and the coating quantity of the adhesive layer is 100-120 g per square meter.
Compared with the prior art, the invention has the following beneficial effects: the conveying belt provided by the invention takes the polyamide layer as the central layer, the bonding layer, the fabric layer, the conductive layer, the coating bonding layer and the wear-resistant low-resistance layer are sequentially coated on two sides of the central layer from inside to outside, and the phenylenediamine monomer is added into the polyamide layer, so that the temperature resistance of the central layer is improved, and the overheating phenomenon caused by cargo friction is prevented; in the wear-resistant low-resistance layer, polycarbonate diol, simethicone, triethylamine, isophorone diisocyanate, E-44 epoxy resin, 1,4-butanediol, acetone, 2,2-bis (hydroxymethyl) propionic acid are mixed to prepare modified polyurethane, mesoporous silica nanoparticles are added into a modified polyurethane solution to be mixed to obtain a spraying coating, and the spraying form is adopted, so that the thickness distribution of the wear-resistant low-resistance layer is more uniform, and the wear resistance and the hardness are improved; the coating structure is used for replacing a thicker surface covering adhesive structure, so that the belt body is thinner and lighter, heat dissipation is facilitated, and the heat resistance of the conveying belt is improved;
the fabric layer is mainly made of nylon braided fabric, so that the tensile strength of the conveying belt is greatly enhanced, and meanwhile, the surface grains of the fabric are used as the grains of the conveying belt and matched with the modified polyurethane layer with high hardness on the surface, so that the friction coefficient of a contact interface with the belt body can be greatly reduced; the addition of the carbon black, the antistatic agent and other additives in the conductive layer reduces the resistance of the surface of the belt body caused by friction and also reduces the physical loss caused by friction; according to the low-resistance high-wear-resistance temperature-resistance low-resistance conveyor belt, the polyamide central layer and the composite coating layer are arranged, so that the service life of the conveyor belt is prolonged, and the conveying performance and efficiency are improved.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The raw materials and sources used in this example are shown in table 1 below:
table 1: various raw materials and manufacturers
Example 1
(1) Preparing a polyamide layer: according to the mass fraction, 1.5 parts of phenylenediamine monomer, 0.8 part of hexamethylene diamine, 0.4 part of glutaric acid and 0.5 part of terephthalic acid are dissolved in a mixed solution of 92 parts of N, N-dimethylacetamide and 1 part of water, the mixed solution is heated to 180 ℃ and uniformly mixed to obtain a polyamide solution, the polyamide solution is prepolymerized for 1-3 hours at 200 ℃, the temperature is raised to 280 ℃ for secondary polymerization for 10min, the temperature is raised to 300 ℃ again, the polyamide solution is extruded and discharged after being vacuumized, and a polyamide layer is obtained after the polyamide solution is molded by a mold;
(2) Preparing an adhesive layer: mixing 10 parts of nylon 6 particles, 30 parts of methanol and 30 parts of phenol in parts by weight, preserving heat for 10 hours at 55 ℃, cooling, exhausting, discharging, storing at 20 ℃ and preparing into a binding liquid for later use;
(3) Fabric layer preparation: weaving nylon 66 into nylon fabric with the thickness of 0.3mm and the gram weight of 90 g/square meter, and drafting and shaping to obtain a fabric layer;
(4) Preparing a conductive layer: taking 100 parts of nitrile rubber raw rubber for banburying for 45s, firstly adding 10 parts of carbon black, continuing to banbury for 2min, then adding 10 parts of carbon black, 10 parts of rubber oil, 5 parts of alkyl dicarboxymethyl ammonium ethylene lactone, 1 part of magnesium oxide and 2 parts of p-phenylenediamine, continuing to banbury, and discharging at the temperature of 105 ℃ to obtain a mixed rubber; placing the rubber compound at 20 ℃ for 24h, adding 0.5 part of sulfur monochloride into the rubber compound, and thinly passing through a sheet, wherein the thickness of the rubber sheet is 1mm; adding the mixture into 2 parts of carbon disulfide solvent, stirring and dissolving to prepare conductive adhesive cement for later use;
(5) Preparing a coating adhesive layer: taking 100 parts of nitrile rubber raw rubber for banburying for 45s, adding 40 parts of white carbon black, continuing to banbury for 2min, adding 4 parts of adhesive RA, 5 parts of rubber oil, 2 parts of magnesium oxide and 1 part of p-phenylenediamine, continuing to banbury, and discharging at 105 ℃ to obtain a mixed rubber; placing the mixed rubber at 20 ℃ for 24h, adding 0.5 part of sulfur monochloride into the mixed rubber, and thinly passing through a sheet, wherein the thickness of the rubber sheet is 1mm; adding the mixture into a solvent, stirring and dissolving to prepare coating adhesive layer adhesive cement for later use;
(6) Preparing the wear-resistant low-resistance layer coating:
A. preparing a modified polyurethane coating: taking 15 parts of polycarbonate diol, 20 parts of simethicone and 20 parts of isophorone diisocyanate, stirring and heating to 70 ℃, adding dibutyltin dilaurate, reacting for 2 hours, cooling to 45 ℃, quickly adding 1 part of 1,4-butanediol, 1 part of 2,2-bis (hydroxymethyl) propionic acid and 1 part of acetone, heating to 70 ℃ after reacting for 5 minutes, continuing to react for 2 hours, adding 8 parts of E-44 epoxy resin, reacting at 70 ℃ for 1.5 hours, cooling to 50 ℃ after the reaction is finished, adding 3 parts of triethylamine, reacting for 30 minutes, adding distilled water, and violently stirring for 0.5 hours to obtain a modified polyurethane solution;
B. preparing mesoporous silica nanoparticles: according to the mass fraction, taking 40 parts of sodium hydroxide, 1 part of template agent, 20 parts of tetraethoxysilane and 10 parts of water; dissolving sodium hydroxide and hexadecyl trimethyl ammonium chloride in water, dropwise adding tetraethoxysilane at 70 ℃, stirring for precipitation, washing, centrifuging and drying the precipitate, and removing the hexadecyl trimethyl ammonium chloride at 60 ℃ by utilizing an organic solvent extraction method to obtain mesoporous silica nanoparticles;
C. adding mesoporous silica nanoparticles into ethanol for dispersion, then grinding for 24 hours to prepare slurry, weighing the slurry and the modified polyurethane solution, adding trisodium phosphate and azobisisobutyronitrile, and ultrasonically stirring for 30 minutes to uniformly mix the mixture to obtain the wear-resistant low-resistance layer coating;
(7) Preparing a conveying belt: coating a coating adhesive layer on the surface of a strong layer fabric in a coating amount of 60 g/square meter, performing heat vulcanization to obtain the coating adhesive layer, taking conductive adhesive cement, coating the conductive adhesive cement on the surface of the coating adhesive layer in a coating amount of 30 g/square meter, and performing vulcanization to obtain a conductive layer; spraying the wear-resistant low-resistance coating on the surface of the conductive layer at the spraying amount of 30 g/square meter, and curing for 40min at 20 ℃ to obtain a conductive wear-resistant layer of the fabric; uniformly coating adhesive liquid on the surface of the polyamide layer, wherein the coating amount is 100g per square meter; and (3) attaching the fabric conductive wear-resistant layer to the two sides of the polyamide layer, and carrying out hot vulcanization to obtain the low-resistance high-wear-resistance temperature-resistance light conveyor belt.
Example 2
(1) Preparation of polyamide layer: according to the mass fraction, 1.8 parts of phenylenediamine monomer, 1 part of hexamethylenediamine, 0.55 part of glutaric acid and 0.7 part of terephthalic acid are dissolved in a mixed solution of 93 parts of N, N-dimethylacetamide and 1 part of water, the mixed solution is heated to 190 ℃ and uniformly mixed to obtain a polyamide solution, the polyamide solution is prepolymerized for 1 to 3 hours at 225 ℃, the temperature is raised to 290 ℃ for secondary polymerization for 13min, the temperature is raised again to 305 ℃, the polyamide solution is vacuumized and extruded to be discharged, and a polyamide layer is obtained by die forming;
(2) Preparing an adhesive layer: mixing 12 parts of nylon 6 particles, 38 parts of methanol and 38 parts of phenol in parts by weight, preserving heat for 11 hours at 58 ℃, cooling, exhausting, discharging, storing at 22.5 ℃ and preparing into a binding liquid for later use;
(3) Fabric layer preparation: weaving nylon 66 into a nylon fabric with the thickness of 0.45mm and the gram weight of 125 g/square meter, and drafting and shaping to obtain a fabric layer;
(4) Preparing a conductive layer: taking 102 parts of nitrile rubber raw rubber for banburying for 45s, firstly adding 13 parts of carbon black for continuously banburying for 2min, then adding 12 parts of carbon black, 12.5 parts of rubber oil, 8 parts of alkyl dicarboxymethyl ammonium ethylene lactone, 2 parts of magnesium oxide and 3 parts of p-phenylenediamine for continuously banburying, and discharging at the temperature of 105 ℃ to obtain a mixed rubber; placing the mixed rubber at 20 ℃ for 24h, adding 1 part of sulfur monochloride into the mixed rubber, and thinly passing through a sheet, wherein the thickness of the rubber sheet is 1mm; adding the mixture into 3 parts of carbon disulfide solvent, stirring and dissolving to prepare conductive adhesive cement for later use;
(5) Preparing a coating adhesive layer: taking 102 parts of nitrile butadiene rubber raw rubber for banburying for 45s, adding 50 parts of white carbon black for continuously banburying for 2min, adding 6 parts of adhesive RA, 8 parts of rubber oil, 3 parts of magnesium oxide and 2 parts of p-phenylenediamine for continuously banburying, and discharging at 105 ℃ to obtain a rubber compound; placing the mixed rubber at 20 ℃ for 24h, adding 0.8 part of sulfur monochloride into the mixed rubber, and thinly passing through a sheet, wherein the thickness of the rubber sheet is 1mm; adding the mixture into a solvent, stirring and dissolving to prepare coating adhesive layer adhesive cement for later use;
(6) Preparing the wear-resistant low-resistance layer coating:
A. preparing a modified polyurethane coating: taking 16.5 parts of polycarbonate diol, 25 parts of dimethyl silicone oil and 25 parts of isophorone diisocyanate, stirring and heating to 72.5 ℃, adding dibutyltin dilaurate, cooling to 48 ℃ after reacting for 2 hours, quickly adding 1.5 parts of 1,4-butanediol, 1.5 parts of 2,2-bis (hydroxymethyl) propionic acid and 1.5 parts of acetone, heating to 72.5 ℃ after reacting for 5 minutes, continuing to react for 2 hours, adding 9 parts of E-44 epoxy resin, reacting for 1.8 hours at 70 ℃, cooling to 52.5 ℃ after the reaction is finished, adding 3.5 parts of triethylamine, adding distilled water after reacting for 30 minutes, and stirring vigorously to obtain a modified polyurethane solution;
B. preparing mesoporous silica nanoparticles: taking 40 parts of sodium hydroxide, 1 part of hexadecyl trimethyl ammonium chloride, 20 parts of ethyl orthosilicate and 10 parts of water by mass; dissolving sodium hydroxide and hexadecyl trimethyl ammonium chloride in water, dropwise adding ethyl orthosilicate at 80 ℃, stirring and precipitating, washing, centrifuging and drying a precipitate, and removing the hexadecyl trimethyl ammonium chloride by using an organic solvent extraction method at 70 ℃ to obtain mesoporous silica nanoparticles;
C. adding mesoporous silica nanoparticles into ethanol for dispersion, then grinding for 24 hours to prepare slurry, weighing the slurry and the modified polyurethane solution, adding trisodium phosphate and azobisisobutyronitrile, and ultrasonically stirring for 30 minutes to uniformly mix the mixture to obtain the wear-resistant low-resistance layer coating;
(7) Preparing a conveying belt: coating the coating adhesive layer on the surface of a strong layer fabric in a coating amount of 70 g/square meter, carrying out hot vulcanization to obtain the coating adhesive layer, taking conductive adhesive cement, coating the conductive adhesive cement on the surface of the coating adhesive layer in a coating amount of 45 g/square meter, and carrying out vulcanization to obtain a conductive layer; spraying the wear-resistant low-resistance coating on the surface of the conductive layer at the spraying amount of 40 g/square meter, and curing for 50min at the temperature of 22.5 ℃ to obtain a conductive wear-resistant layer of the fabric; uniformly coating adhesive liquid on the surface of the polyamide layer, wherein the coating amount is 110g per square meter; and (3) attaching the fabric conductive wear-resistant layer to the two sides of the polyamide layer, and carrying out heat vulcanization to obtain the low-resistance high-wear-resistance temperature-resistance light conveyor belt.
Example 3
(1) Preparing a polyamide layer: according to the mass fraction, 2 parts of phenylenediamine monomer, 1.2 parts of hexamethylenediamine, 0.7 part of glutaric acid and 0.9 part of terephthalic acid are dissolved in a mixed solution of 95 parts of N, N-dimethylacetamide and 1 part of water, the mixed solution is heated to 200 ℃ and uniformly mixed to obtain a polyamide solution, the polyamide solution is prepolymerized for 1-3 hours at 250 ℃, the temperature is raised to 300 ℃ for secondary polymerization for 15min, the temperature is raised to 310 ℃ again, the polyamide solution is vacuumized and extruded to be discharged, and a polyamide layer is obtained by die forming;
(2) Preparing an adhesive layer: mixing 15 parts of nylon 6 particles, 45 parts of methanol and 45 parts of phenol in parts by weight, preserving heat at 60 ℃ for 12 hours, cooling, exhausting, discharging, storing at 25 ℃ and preparing into a binding liquid for later use;
(3) Fabric layer preparation: weaving nylon 66 into nylon fabric with the thickness of 0.6mm and the gram weight of 160 g/square meter, and drafting and shaping to obtain a fabric layer;
(4) Preparing a conductive layer: taking 105 parts of nitrile rubber crude rubber for banburying for 45s, firstly adding 15 parts of carbon black, continuing to banbury for 2min, then adding 15 parts of carbon black, 15 parts of rubber oil, 10 parts of alkyl dicarboxymethyl ammonium ethylene lactone, 3 parts of magnesium oxide and 4 parts of p-phenylenediamine, continuing to banbury, and discharging at the temperature of 105 ℃ to obtain a mixed rubber; placing the mixed rubber at 20 ℃ for 24h, adding 1.5 parts of sulfur monochloride into the mixed rubber, and thinly passing through a sheet, wherein the thickness of the rubber sheet is 1mm; adding the mixture into 4 parts of carbon disulfide solvent, stirring and dissolving to prepare conductive adhesive cement for later use;
(5) Preparing a coating adhesive layer: taking 105 parts of nitrile butadiene rubber raw rubber for banburying for 45s, adding 60 parts of white carbon black for continuously banburying for 2min, adding 8 parts of adhesive RA, 10 parts of rubber oil, 4 parts of magnesium oxide and 3 parts of p-phenylenediamine for continuously banburying, and discharging at the temperature of 105 ℃ to obtain a rubber compound; placing the mixed rubber at 20 ℃ for 24h, adding 1 part of sulfur monochloride into the mixed rubber, and thinly passing through a sheet, wherein the thickness of the rubber sheet is 1mm; adding the mixture into a solvent, stirring and dissolving to prepare coating adhesive layer adhesive cement for later use;
(6) Preparing the wear-resistant low-resistance layer coating:
A. preparing a modified polyurethane coating: according to the mass fraction, taking 18 parts of polycarbonate diol, 30 parts of simethicone and 30 parts of isophorone diisocyanate, stirring and heating to 75 ℃, adding dibutyltin dilaurate, reacting for 3 hours, cooling to 50 ℃, quickly adding 2 parts of 1,4-butanediol, 2 parts of 2,2-bis (hydroxymethyl) propionic acid and 2 parts of acetone, reacting for 5 minutes, heating to 75 ℃, continuing to react for 3 hours, adding 10 parts of E-44 epoxy resin, reacting for 2 hours at 70 ℃, cooling to 55 ℃ after the reaction is finished, adding 4 parts of triethylamine, reacting for 30 minutes, adding distilled water, and violently stirring for 1 hour to obtain a modified polyurethane solution;
B. preparing mesoporous silica nanoparticles: taking 40 parts of sodium hydroxide, 1 part of hexadecyl trimethyl ammonium chloride, 20 parts of ethyl orthosilicate and 10 parts of water by mass; dissolving sodium hydroxide and hexadecyl trimethyl ammonium chloride in water, dropwise adding ethyl orthosilicate at 90 ℃, stirring and precipitating, washing, centrifuging and drying a precipitate, and removing the hexadecyl trimethyl ammonium chloride by using an organic solvent extraction method at 80 ℃ to obtain mesoporous silica nanoparticles;
C. adding mesoporous silica nanoparticles into ethanol for dispersion, then grinding for 24 hours to prepare slurry, weighing the slurry and the modified polyurethane solution, adding trisodium phosphate and azobisisobutyronitrile, and ultrasonically stirring for 30min to uniformly mix the mixture to obtain the wear-resistant low-resistance layer coating;
(7) Preparing a conveying belt: coating a coating adhesive layer on the surface of a strong layer fabric in a coating amount of 80 g/square meter, performing heat vulcanization to obtain the coating adhesive layer, taking conductive adhesive cement, coating the conductive adhesive cement on the surface of the coating adhesive layer in a coating amount of 60 g/square meter, and performing vulcanization to obtain a conductive layer; spraying the wear-resistant low-resistance coating on the surface of the conductive layer at the spraying amount of 50 g/square meter, and curing for 60min at 25 ℃ to obtain a conductive wear-resistant layer of the fabric; uniformly scraping and coating adhesive liquid on the surface of the polyamide layer, wherein the coating quantity is 120 g/square meter; and (3) attaching the fabric conductive wear-resistant layer to the two sides of the polyamide layer, and carrying out hot vulcanization to obtain the low-resistance high-wear-resistance temperature-resistance light conveyor belt.
Comparative example 1
Comparative example 1 was used as a control, and the parameters were changed so that no mesoporous silica was added to the wear-resistant low-resistivity layer.
(1) Preparing a polyamide layer: according to the mass fraction, 1.5 parts of phenylenediamine monomer, 0.8 part of hexamethylene diamine, 0.4 part of glutaric acid and 0.5 part of terephthalic acid are dissolved in a mixed solution of 92 parts of N, N-dimethylacetamide and 1 part of water, the mixed solution is heated to 180 ℃ and uniformly mixed to obtain a polyamide solution, the polyamide solution is prepolymerized for 1-3 hours at 200 ℃, the temperature is raised to 280 ℃ for secondary polymerization for 10min, the temperature is raised to 300 ℃ again, the polyamide solution is extruded and discharged after being vacuumized, and a polyamide layer is obtained after the polyamide solution is molded by a mold;
(2) Preparing an adhesive layer: mixing 10 parts of nylon 6 particles, 30 parts of methanol and 30 parts of phenol in parts by weight, preserving heat for 10 hours at 55 ℃, cooling, exhausting, discharging, storing at 20 ℃ and preparing into a binding liquid for later use;
(3) Preparing a fabric layer: weaving nylon 66 into nylon fabric with the thickness of 0.3mm and the gram weight of 90 g/square meter, and drafting and shaping to obtain a fabric layer;
(4) Preparing a conductive layer: taking 100 parts of nitrile rubber raw rubber for banburying for 45s, firstly adding 10 parts of carbon black, continuing to banbury for 2min, then adding 10 parts of carbon black, 10 parts of rubber oil, 5 parts of alkyl dicarboxymethyl ammonium ethylene lactone, 1 part of magnesium oxide and 2 parts of p-phenylenediamine, continuing to banbury, and discharging at the temperature of 105 ℃ to obtain a mixed rubber; placing the rubber compound at 20 ℃ for 24h, adding 0.5 part of sulfur monochloride into the rubber compound, and thinly passing through a sheet, wherein the thickness of the rubber sheet is 1mm; adding the mixture into 2 parts of carbon disulfide solvent, stirring and dissolving to prepare conductive adhesive cement for later use;
(5) Preparing a coating adhesive layer: taking 100 parts of nitrile rubber raw rubber for banburying for 45s, adding 40 parts of white carbon black, continuing to banbury for 2min, adding 4 parts of adhesive RA, 5 parts of rubber oil, 2 parts of magnesium oxide and 1 part of p-phenylenediamine, continuing to banbury, and discharging at 105 ℃ to obtain a mixed rubber; placing the mixed rubber at 20 ℃ for 24h, adding 0.5 part of sulfur monochloride into the mixed rubber, and thinly passing through a sheet, wherein the thickness of the rubber sheet is 1mm; adding the mixture into a solvent, stirring and dissolving to prepare coating adhesive layer adhesive cement for later use;
(6) Preparing the wear-resistant low-resistance layer coating:
preparing a modified polyurethane coating: according to the mass fraction, taking 15 parts of polycarbonate diol, 20 parts of dimethyl silicone oil and 20 parts of isophorone diisocyanate, stirring and heating to 70 ℃, adding dibutyltin dilaurate, reacting for 2 hours, cooling to 45 ℃, quickly adding 1 part of 1,4-butanediol, 1 part of 2,2-bis (hydroxymethyl) propionic acid and 1 part of acetone, reacting for 5 minutes, heating to 70 ℃, continuing to react for 2 hours, adding 8 parts of E-44 epoxy resin, reacting for 1.5 hours at 70 ℃, cooling to 50 ℃ after the reaction is finished, adding 3 parts of triethylamine, reacting for 30 minutes, adding distilled water, and stirring vigorously for 0.5 hours to obtain a modified polyurethane solution; adding trisodium phosphate and azodiisobutyronitrile into the modified polyurethane solution, and ultrasonically stirring for 30min to uniformly mix the mixture to obtain the wear-resistant low-resistance layer coating;
(7) Preparing a conveying belt: coating a coating adhesive layer on the surface of a strong layer fabric in a coating amount of 60 g/square meter, performing heat vulcanization to obtain the coating adhesive layer, taking conductive adhesive cement, coating the conductive adhesive cement on the surface of the coating adhesive layer in a coating amount of 30 g/square meter, and performing vulcanization to obtain a conductive layer; taking the wear-resistant low-resistance coating, spraying the wear-resistant low-resistance coating on the surface of the conductive layer in the spraying amount of 30 g/square meter, and curing for 40min at 20 ℃ to obtain a conductive wear-resistant layer of the fabric; uniformly coating adhesive liquid on the surface of the polyamide layer, wherein the coating amount is 100g per square meter; and (3) attaching the fabric conductive wear-resistant layer to the two sides of the polyamide layer, and carrying out hot vulcanization to obtain the low-resistance high-wear-resistance temperature-resistance light conveyor belt.
Comparative example 2
Comparative example 2 example 1 was used as a control with parameters changed to the polyamide layer in the fabric layer without adding phenylenediamine monomer.
(1) Preparing a polyamide layer: according to the mass fraction, 1.5 parts of phenylenediamine monomer, 0.8 part of hexamethylene diamine, 0.4 part of glutaric acid and 0.5 part of terephthalic acid are dissolved in a mixed solution of 92 parts of N, N-dimethylacetamide and 1 part of water, the mixed solution is heated to 180 ℃ and uniformly mixed to obtain a polyamide solution, the polyamide solution is prepolymerized for 1-3 hours at 200 ℃, the temperature is raised to 280 ℃ for secondary polymerization for 10min, the temperature is raised to 300 ℃ again, the polyamide solution is extruded and discharged after being vacuumized, and a polyamide layer is obtained after the polyamide solution is molded by a mold;
(2) Preparing an adhesive layer: mixing 10 parts of nylon 6 particles, 30 parts of methanol and 30 parts of phenol according to parts by weight, preserving heat for 10 hours at 55 ℃, cooling, exhausting, discharging, storing at 20 ℃ and preparing into a binding solution for later use;
(3) Fabric layer preparation: spinning nylon 66 into nylon fabric with the thickness of 0.3mm and the gram weight of 90 g/square meter, and drafting and shaping to obtain a fabric layer;
(4) Preparing a conductive layer: taking 100 parts of nitrile rubber raw rubber for banburying for 45s, firstly adding 10 parts of carbon black, continuing to banbury for 2min, then adding 10 parts of carbon black, 10 parts of rubber oil, 5 parts of alkyl dicarboxymethyl ammonium ethylene lactone, 1 part of magnesium oxide and 2 parts of p-phenylenediamine, continuing to banbury, and discharging at the temperature of 105 ℃ to obtain a mixed rubber; placing the rubber compound at 20 ℃ for 24h, adding 0.5 part of sulfur monochloride into the rubber compound, and thinly passing through a sheet, wherein the thickness of the rubber sheet is 1mm; adding the mixture into 2 parts of carbon disulfide solvent, stirring and dissolving to prepare conductive adhesive cement for later use;
(5) Preparing a coating adhesive layer: taking 100 parts of nitrile rubber raw rubber for banburying for 45s, adding 40 parts of white carbon black, continuing to banbury for 2min, adding 4 parts of adhesive RA, 5 parts of rubber oil, 2 parts of magnesium oxide and 1 part of p-phenylenediamine, continuing to banbury, and discharging at 105 ℃ to obtain a mixed rubber; placing the mixed rubber at 20 ℃ for 24h, adding 0.5 part of sulfur monochloride into the mixed rubber, and thinly passing through a sheet, wherein the thickness of the rubber sheet is 1mm; adding the mixture into a solvent, stirring and dissolving to prepare coating adhesive layer adhesive cement for later use;
(6) Preparing the wear-resistant low-resistance layer coating:
A. preparing a modified polyurethane coating: taking 15 parts of polycarbonate diol, 20 parts of simethicone and 20 parts of isophorone diisocyanate, stirring and heating to 70 ℃, adding dibutyltin dilaurate, reacting for 2 hours, cooling to 45 ℃, quickly adding 1 part of 1,4-butanediol, 1 part of 2,2-bis (hydroxymethyl) propionic acid and 1 part of acetone, heating to 70 ℃ after reacting for 5 minutes, continuing to react for 2 hours, adding 8 parts of E-44 epoxy resin, reacting at 70 ℃ for 1.5 hours, cooling to 50 ℃ after the reaction is finished, adding 3 parts of triethylamine, reacting for 30 minutes, adding distilled water, and violently stirring for 0.5 hours to obtain a modified polyurethane solution;
B. preparing mesoporous silica nanoparticles: taking 40 parts of sodium hydroxide, 1 part of template agent, 20 parts of ethyl orthosilicate and 10 parts of water by mass; dissolving sodium hydroxide and hexadecyl trimethyl ammonium chloride in water, dropwise adding tetraethoxysilane at 70 ℃, stirring for precipitation, washing, centrifuging and drying the precipitate, and removing the hexadecyl trimethyl ammonium chloride at 60 ℃ by utilizing an organic solvent extraction method to obtain mesoporous silica nanoparticles;
C. adding mesoporous silica nanoparticles into ethanol for dispersion, then grinding for 24 hours to prepare slurry, weighing the slurry and the modified polyurethane solution, adding trisodium phosphate and azobisisobutyronitrile, and ultrasonically stirring for 30min to uniformly mix the mixture to obtain the wear-resistant low-resistance layer coating;
(7) Preparing a conveying belt: coating a coating adhesive layer on the surface of a strong layer fabric in a coating amount of 60 g/square meter, performing heat vulcanization to obtain the coating adhesive layer, taking conductive adhesive cement, coating the conductive adhesive cement on the surface of the coating adhesive layer in a coating amount of 30 g/square meter, and performing vulcanization to obtain a conductive layer; spraying the wear-resistant low-resistance coating on the surface of the conductive layer at the spraying amount of 30 g/square meter, and curing for 40min at 20 ℃ to obtain a conductive wear-resistant layer of the fabric; uniformly coating adhesive liquid on the surface of the polyamide layer, wherein the coating amount is 100g per square meter; and (3) attaching the fabric conductive wear-resistant layer to the two sides of the polyamide layer, and carrying out hot vulcanization to obtain the low-resistance high-wear-resistance temperature-resistance light conveyor belt.
Experiment of
(1) A UMT-3 type friction wear testing machine is used for testing the friction resistance of the examples 1-3 and the comparative examples 1-2, the testing conditions are that a normal load is applied to a 4mm GCr15 ball for 5N, the sliding time is 20min, the rotating speed is 300rpm, the dry friction is carried out, and the testing results are shown in the following table 2;
(2) Hardness tests were performed on examples 1 to 3 and comparative examples 1 to 2 using a vickers microhardness tester, and the test results are shown in table 2 below;
(3) The belt samples of examples 1-3 and comparative examples 1-2 were heated to 90 ℃ and the tensile strength of examples 1-3 and comparative examples 1-2 was measured using an XLW (PC) tensile tester, and the results are shown in Table 2 below.
Table 2: performance testing of light conveyor belts
Shown in table 1: compared with the examples 1 to 3 and the comparative examples 1 to 2, in the comparative example 1, the mesoporous silica nanoparticles are not added in the composite layer, so that the surface hardness of the conveyer belt is reduced; in comparative example 2, in which the phenylenediamine monomer was not added to the polyamide layer, a decrease in the tensile strength of the conveyor belt at high temperature was measured.
And (4) conclusion: the wear-resistant low-resistance layer achieves the effects of wear resistance and low resistance by adding the mesoporous silica nanoparticles into the modified polyurethane material, greatly reduces the friction coefficient of a contact interface with the belt body, is more wear-resistant and has low heat generation; the phenylenediamine monomer is added into the polyamide layer to enable the central layer to achieve the heat-resistant effect, the coating structure is used for replacing a thicker surface covering adhesive structure, the belt body is lighter and thinner, heat dissipation is facilitated, the heat resistance of the conveying belt is improved, the arrangement of the conducting layer is beneficial to reducing resistance heat of an object and the conveying belt, and finally the low-resistance high-wear-resistance temperature-resistance light conveying belt is obtained.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides a light-duty conveyer belt of wear-resisting temperature resistant of low resistance height which characterized in that: the conveying belt takes a polyamide layer as a central layer, composite layers are symmetrically arranged on two sides of the central layer, and the composite layers sequentially comprise an adhesive layer, a fabric layer, a coating adhesive layer, a conductive layer and a wear-resistant low-resistance layer from inside to outside.
2. The low-resistance high-wear-resistance temperature-resistant light conveying belt according to claim 1, characterized in that: the polyamide layer comprises the following components: according to the mass portion, 1.5 to 2 portions of phenylenediamine monomer, 0.8 to 1.2 portions of hexamethylene diamine, 0.4 to 0.7 portion of glutaric acid, 0.5 to 0.9 portion of terephthalic acid and 92 to 95 portions of N, N-dimethylacetamide.
3. The low-resistance high-wear-resistance temperature-resistant light conveying belt according to claim 1, characterized in that: the adhesive layer comprises the following components: according to the mass portion, 10 to 15 portions of nylon 6 particles, 30 to 45 portions of methanol solvent and 30 to 45 portions of phenol.
4. The low-resistance high-wear-resistance temperature-resistant light conveyor belt according to claim 1, characterized in that: the fabric layer is primarily formed from nylon 66 knit.
5. The low-resistance high-wear-resistance temperature-resistant light conveyor belt according to claim 1, characterized in that: the coating bonding layer comprises the following components: 100 to 105 portions of nitrile rubber crude rubber, 40 to 60 portions of reinforcing agent, 4 to 8 portions of adhesive, 5 to 10 portions of rubber oil, 2 to 4 portions of vulcanization auxiliary agent, 0.5 to 1 portion of vulcanizing agent, 1 to 3 portions of rubber anti-aging agent and 2 to 4 portions of carbon disulfide solvent.
6. The low-resistance high-wear-resistance temperature-resistant light conveying belt according to claim 1, characterized in that: the conducting layer is a butadiene-acrylonitrile rubber layer and comprises the following components: 100 to 105 portions of nitrile rubber crude rubber, 20 to 30 portions of carbon black, 5 to 10 portions of antistatic agent, 10 to 15 portions of rubber oil, 1 to 3 portions of vulcanization auxiliary agent, 0.5 to 1.5 portions of vulcanizing agent, 2 to 4 portions of rubber antioxidant and 2 to 4 portions of carbon disulfide solvent.
7. The low-resistance high-wear-resistance temperature-resistant light conveyor belt according to claim 1, characterized in that: the wear-resistant low-resistance layer comprises the following components: according to the mass parts, 85-90 parts of modified polyurethane solution, 10-12 parts of mesoporous silica nanoparticles, 5-10 parts of dispersant and 5-10 parts of defoaming agent.
8. The preparation method of the low-resistance high-wear-resistance temperature-resistant light conveyor belt is characterized by comprising the following specific preparation steps of:
(1) Preparing a polyamide layer: dissolving phenylenediamine monomer, hexamethylenediamine, glutaric acid and terephthalic acid in a mixed solution of N, N-dimethylacetamide and water, heating to 180-200 ℃, uniformly mixing to obtain a polyamide solution, prepolymerizing the polyamide solution at 200-250 ℃ for 1-3 h, heating to 280-300 ℃, performing secondary polymerization for 10-15 min, heating to 300-310 ℃, vacuumizing, extruding and discharging, and molding by a mold to obtain a polyamide layer;
(2) Preparing an adhesive layer: mixing nylon 6 particles, methanol and phenol, preserving heat for 10-12 hours at 55-60 ℃, cooling, exhausting, discharging, storing at 20-25 ℃ and preparing into a binding liquid for later use;
(3) Fabric layer preparation: spinning nylon 66 into a nylon fabric, and drafting and shaping to obtain a fabric layer;
(4) Preparing a conductive layer: taking nitrile rubber crude rubber for banburying for 45-60 s, firstly adding half of carbon black for continuously banburying for 2-3 min, adding the rest carbon black, rubber oil, an antistatic agent, a vulcanization aid and a rubber antioxidant for continuously banburying, and discharging at the temperature of 105-107 ℃ to obtain a rubber compound; placing the rubber compound for 24h at the temperature of 20-25 ℃, adding a vulcanizing agent into the rubber compound, and thinly passing through a sheet, wherein the thickness of the rubber sheet is 1-1.2 mm; adding the mixture into a carbon disulfide solvent, stirring and dissolving to prepare conductive adhesive cement for later use;
(5) Preparing a coating adhesive layer: taking nitrile rubber raw rubber for banburying for 45-60 s, adding a reinforcing agent, continuing banburying for 2-3 min, adding an adhesive, rubber oil, a vulcanization aid and a rubber antioxidant, continuing banburying, and discharging at 105-107 ℃ to obtain a rubber compound; placing the mixed rubber at 20-25 ℃ for 24h, adding a vulcanizing agent into the mixed rubber, and thinly discharging a sheet, wherein the thickness of the rubber sheet is 1-1.2 mm; adding the mixture into a carbon disulfide solvent, stirring and dissolving to prepare coating bonding layer adhesive cement for later use;
(6) Preparing the wear-resistant low-resistance layer coating:
A. preparing a modified polyurethane coating: taking polycarbonate dihydric alcohol, simethicone and isophorone diisocyanate, stirring and heating to 70-75 ℃, adding a catalyst, reacting for 2-3 h, cooling to 45-50 ℃, quickly adding 1,4-butanediol, 2,2-dimethylolpropionic acid and acetone, reacting for 5min, heating to 70-75 ℃, continuing to react for 2-3 h, adding E-44 epoxy resin, reacting for 1.5-2 h at 70-75 ℃, cooling to 50-55 ℃ after the reaction is finished, adding triethylamine, reacting for 30min, adding distilled water, and violently stirring for 0.5-1 h to obtain a modified polyurethane solution;
B. preparing mesoporous silica nanoparticles: dissolving sodium hydroxide, a template agent, tetraethoxysilane and water into the water, dropwise adding tetraethoxysilane at the temperature of 70-90 ℃, stirring and precipitating, washing, centrifuging and drying the precipitate, and removing the template agent by using an organic solvent extraction method at the temperature of 60-80 ℃ to obtain mesoporous silica nanoparticles;
C. adding ethanol into mesoporous silica nanoparticles for dispersion, then grinding for 24 hours to prepare slurry, weighing the slurry and the modified polyurethane solution, adding a dispersing agent and a defoaming agent, and ultrasonically stirring for 30min to uniformly mix the materials to obtain the wear-resistant low-resistance layer coating;
(7) Preparing a conveying belt: coating the coating adhesive layer on the surface of the fabric layer by scraping, carrying out heat vulcanization to obtain a coating adhesive layer, coating the conductive adhesive slurry on the surface of the coating adhesive layer by scraping, and carrying out vulcanization to obtain a conductive layer; spraying the wear-resistant low-resistance coating on the surface of the conductive layer, and curing at 20-25 ℃ for 40-60 min to obtain a conductive wear-resistant layer of the fabric; and uniformly scraping and coating adhesive liquid on the surface of the polyamide layer, attaching the fabric conductive wear-resistant layer to the two sides of the polyamide layer, and carrying out hot vulcanization to obtain the low-resistance high-wear-resistance temperature-resistance light conveyor belt.
9. The preparation method of the low-resistance high-wear-resistance temperature-resistant light conveyor belt according to claim 8, characterized in that: in the step (2), the mass parts of the nylon 6 particles, the methanol and the phenol are as follows: 1:3:3; in the step (4), the antistatic agent is alkyl dicarboxymethyl ammonium ethyl lactone, the vulcanizing assistant is magnesium oxide, the vulcanizing agent is sulfur monochloride, and the rubber antioxidant is p-phenylenediamine.
10. The preparation method of the low-resistance high-wear-resistance temperature-resistant light conveyor belt according to claim 8, characterized in that: in the step (5), the adhesive is adhesive RA, and the reinforcing agent is white carbon black; in the step (6), the catalyst is dibutyltin dilaurate, the dispersing agent is trisodium phosphate, the defoaming agent is azobisisobutyronitrile, and the template agent is hexadecyltrimethylammonium chloride.
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