CN104553152A - Novel anti-corrosion steel belt and preparation method thereof - Google Patents
Novel anti-corrosion steel belt and preparation method thereof Download PDFInfo
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- CN104553152A CN104553152A CN201410857486.0A CN201410857486A CN104553152A CN 104553152 A CN104553152 A CN 104553152A CN 201410857486 A CN201410857486 A CN 201410857486A CN 104553152 A CN104553152 A CN 104553152A
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- steel band
- powder
- novel anticorrosion
- coating
- epoxy
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 136
- 239000010959 steel Substances 0.000 title claims abstract description 136
- 238000002360 preparation method Methods 0.000 title claims abstract description 24
- 238000005260 corrosion Methods 0.000 title abstract description 10
- 239000000843 powder Substances 0.000 claims abstract description 120
- 239000004593 Epoxy Substances 0.000 claims abstract description 47
- -1 polyethylene Polymers 0.000 claims abstract description 28
- 239000004698 Polyethylene Substances 0.000 claims abstract description 22
- 239000011248 coating agent Substances 0.000 claims abstract description 22
- 238000000576 coating method Methods 0.000 claims abstract description 22
- 229920000573 polyethylene Polymers 0.000 claims abstract description 22
- 239000004831 Hot glue Substances 0.000 claims abstract description 14
- 229920005989 resin Polymers 0.000 claims description 43
- 239000011347 resin Substances 0.000 claims description 43
- 239000000203 mixture Substances 0.000 claims description 25
- 238000003618 dip coating Methods 0.000 claims description 22
- 229920001903 high density polyethylene Polymers 0.000 claims description 20
- 239000004700 high-density polyethylene Substances 0.000 claims description 20
- 238000001125 extrusion Methods 0.000 claims description 14
- 229920000098 polyolefin Polymers 0.000 claims description 13
- 229920001577 copolymer Polymers 0.000 claims description 12
- 239000002585 base Substances 0.000 claims description 11
- 238000002156 mixing Methods 0.000 claims description 11
- 239000002994 raw material Substances 0.000 claims description 11
- 229920000089 Cyclic olefin copolymer Polymers 0.000 claims description 10
- 239000000428 dust Substances 0.000 claims description 10
- 239000008187 granular material Substances 0.000 claims description 10
- 229920001684 low density polyethylene Polymers 0.000 claims description 10
- 239000004702 low-density polyethylene Substances 0.000 claims description 10
- 229920000092 linear low density polyethylene Polymers 0.000 claims description 9
- 239000004707 linear low-density polyethylene Substances 0.000 claims description 9
- 229920013640 amorphous poly alpha olefin Polymers 0.000 claims description 8
- 239000011159 matrix material Substances 0.000 claims description 8
- 239000003822 epoxy resin Substances 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 7
- 229920001179 medium density polyethylene Polymers 0.000 claims description 7
- 239000004701 medium-density polyethylene Substances 0.000 claims description 7
- 229920000647 polyepoxide Polymers 0.000 claims description 7
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 6
- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical compound C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 claims description 6
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 claims description 6
- 238000010297 mechanical methods and process Methods 0.000 claims description 6
- 239000000178 monomer Substances 0.000 claims description 6
- XPVIQPQOGTVMSU-UHFFFAOYSA-N (4-acetamidophenyl)arsenic Chemical compound CC(=O)NC1=CC=C([As])C=C1 XPVIQPQOGTVMSU-UHFFFAOYSA-N 0.000 claims description 5
- 239000004743 Polypropylene Substances 0.000 claims description 5
- 239000003513 alkali Substances 0.000 claims description 5
- 238000004140 cleaning Methods 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 5
- 238000005096 rolling process Methods 0.000 claims description 5
- 238000007711 solidification Methods 0.000 claims description 5
- 230000008023 solidification Effects 0.000 claims description 5
- 239000000126 substance Substances 0.000 claims description 5
- 238000005406 washing Methods 0.000 claims description 5
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims description 4
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 4
- 239000004342 Benzoyl peroxide Substances 0.000 claims description 4
- OMPJBNCRMGITSC-UHFFFAOYSA-N Benzoylperoxide Chemical compound C=1C=CC=CC=1C(=O)OOC(=O)C1=CC=CC=C1 OMPJBNCRMGITSC-UHFFFAOYSA-N 0.000 claims description 4
- JIGUQPWFLRLWPJ-UHFFFAOYSA-N Ethyl acrylate Chemical compound CCOC(=O)C=C JIGUQPWFLRLWPJ-UHFFFAOYSA-N 0.000 claims description 4
- 235000019400 benzoyl peroxide Nutrition 0.000 claims description 4
- CQEYYJKEWSMYFG-UHFFFAOYSA-N butyl acrylate Chemical compound CCCCOC(=O)C=C CQEYYJKEWSMYFG-UHFFFAOYSA-N 0.000 claims description 4
- 239000004843 novolac epoxy resin Substances 0.000 claims description 4
- PNJWIWWMYCMZRO-UHFFFAOYSA-N pent‐4‐en‐2‐one Natural products CC(=O)CC=C PNJWIWWMYCMZRO-UHFFFAOYSA-N 0.000 claims description 4
- 229920001155 polypropylene Polymers 0.000 claims description 4
- XMNIXWIUMCBBBL-UHFFFAOYSA-N 2-(2-phenylpropan-2-ylperoxy)propan-2-ylbenzene Chemical compound C=1C=CC=CC=1C(C)(C)OOC(C)(C)C1=CC=CC=C1 XMNIXWIUMCBBBL-UHFFFAOYSA-N 0.000 claims description 3
- DGUJJOYLOCXENZ-UHFFFAOYSA-N 4-[2-[4-(oxiran-2-ylmethoxy)phenyl]propan-2-yl]phenol Chemical compound C=1C=C(OCC2OC2)C=CC=1C(C)(C)C1=CC=C(O)C=C1 DGUJJOYLOCXENZ-UHFFFAOYSA-N 0.000 claims description 3
- 229920002943 EPDM rubber Polymers 0.000 claims description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 3
- CTKINSOISVBQLD-UHFFFAOYSA-N Glycidol Chemical compound OCC1CO1 CTKINSOISVBQLD-UHFFFAOYSA-N 0.000 claims description 3
- 229940106691 bisphenol a Drugs 0.000 claims description 3
- 238000009413 insulation Methods 0.000 claims description 3
- 229920001596 poly (chlorostyrenes) Polymers 0.000 claims description 3
- 229920013639 polyalphaolefin Polymers 0.000 claims description 3
- 229920001935 styrene-ethylene-butadiene-styrene Polymers 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 14
- 230000000694 effects Effects 0.000 abstract description 10
- 230000007797 corrosion Effects 0.000 abstract description 3
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 239000003963 antioxidant agent Substances 0.000 description 7
- 230000003078 antioxidant effect Effects 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 7
- 238000006243 chemical reaction Methods 0.000 description 5
- 239000010410 layer Substances 0.000 description 5
- 238000010276 construction Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 230000009257 reactivity Effects 0.000 description 4
- 230000032683 aging Effects 0.000 description 3
- 230000002421 anti-septic effect Effects 0.000 description 3
- 150000004982 aromatic amines Chemical class 0.000 description 3
- 238000005246 galvanizing Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 229910001335 Galvanized steel Inorganic materials 0.000 description 2
- 239000011247 coating layer Substances 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000008397 galvanized steel Substances 0.000 description 2
- 230000002688 persistence Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 235000013312 flour Nutrition 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 150000002924 oxiranes Chemical class 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 150000002989 phenols Chemical class 0.000 description 1
- 150000008301 phosphite esters Chemical class 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
- B32B15/092—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin comprising epoxy resins
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/18—Processes for applying liquids or other fluent materials performed by dipping
- B05D1/22—Processes for applying liquids or other fluent materials performed by dipping using fluidised-bed technique
- B05D1/24—Applying particulate materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/36—Successively applying liquids or other fluent materials, e.g. without intermediate treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/38—Layered products comprising a layer of synthetic resin comprising epoxy resins
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2255/00—Coating on the layer surface
- B32B2255/04—Coating on the layer surface on a particulate layer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2255/00—Coating on the layer surface
- B32B2255/26—Polymeric coating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2255/00—Coating on the layer surface
- B32B2255/28—Multiple coating on one surface
Landscapes
- Preventing Corrosion Or Incrustation Of Metals (AREA)
- Paints Or Removers (AREA)
- Laminated Bodies (AREA)
Abstract
The invention discloses a novel anti-corrosion steel belt and a preparation method thereof. The novel anti-corrosion steel belt comprises a steel belt body, wherein an epoxy powder coating is arranged on the surface of the steel belt body; a hot melt adhesive powder coating is arranged on the surface of the epoxy powder coating; the epoxy powder coating is prepared from epoxy powder; the hot melt adhesive powder coating is prepared from hot melt adhesive powder. According to the novel anti-corrosion steel belt prepared by adopting the method for preparing the anti-corrosion steel belt, which is disclosed by the invention, and a finished product pipe thereof, the peel strength is improved by over twice and an effect of resisting to aqueous corrosion is improved by over 10 times. After the novel anti-corrosion steel belt is applied to a steel belt reinforced polyethylene helical bellows, the service life of the pipe is prolonged and the possible technical risks of degumming, exposure of the steel belt and poor anti-corrosion effect of an end port of the type of pipe in the long-time using process currently are reduced.
Description
Technical field
The present invention relates to materials application technical field, more particularly, relate to a kind of novel anticorrosion steel band and preparation method thereof.
Background technology
Steel band reinforced polyethylene spiral ripple pipe has the advantages such as light weight, ring stiffness be high, corrosion-resistant, apply more and more extensive in municipal drainage, blow-off line, in CJ/T225-2011 " buried draining steel band enhanced polyethylene (PE) helical bellows ", define pipe structure.Adhering resin is tie steel band and polyethylene effectively combined, and adhering resin and steel band, adhering resin and poly composite effect directly determine the quality of tubing.Adhering resin and polyethylene belong to close polyolefine material together, and when controlling of production process is proper, composite effect is excellent.
Current adhering resin quality is uneven, and bonding interface is water-fast, and difference on effect is huge, and the adhering resin of Performance comparision excellence and steel band bonding interface soaked time of coming unglued, namely the adhering resin of poor performance can come unglued for one day at about one month.Bonding interface resistance to water is unstable, risk of coming unglued is had during port Long-Time Service, and then cause steel band to expose, the steel band poor corrosion resistance exposed, these risks that may exist have had a strong impact on the service life of steel band reinforced polyethylene spiral ripple pipe, become a difficult problem for puzzlement steel band reinforced polyethylene spiral ripple pipe quality.
The adhering resin of development quality excellence and control adhering resin and polyethylene is only had to belong to the production technology of close polyolefine material compound together, high-quality steel band could be produced, improve the antiseptic effect of steel band, and then improve service life of steel band reinforced polyethylene spiral ripple pipe, reduce may exist in current the type pipe end Long-Time Service process come unstuck, steel band exposes, the technical risk of anticorrosion effect difference.
Summary of the invention
The technical problem to be solved in the present invention is, for the above-mentioned defect of prior art, provides a kind of novel anticorrosion steel band and preparation method thereof.
The technical solution adopted for the present invention to solve the technical problems is: a kind of novel anticorrosion steel band, comprise steel band body (1), be provided with FBE (2) on steel band body (1) surface, be provided with PUR powder coating (3) on FBE (2) surface; FBE (2) is prepared from by epoxy powder, and PUR powder coating (3) is prepared from by PUR powder.
Novel anticorrosion steel band of the present invention, wherein, described PUR powder is made up of the component of following percentage by weight:
Novel anticorrosion steel band of the present invention, wherein, described component A: polycthylene grafted thing is formed by the polymerizable raw material of following percentage by weight:
Matrix resin 92-98.2%,
Grafted monomers 1.5-6.5%,
Initator 0.30-1.50%;
Wherein, described matrix resin is one or more the mixture in polyethylene, ethylenic copolymer, polypropylene, described grafted monomers is one or more the mixture in maleic anhydride, acrylic acid, ethyl acrylate, butyl acrylate, and described initator is one in cumyl peroxide, benzoyl peroxide or its mixture.
Novel anticorrosion steel band of the present invention, wherein, described matrix resin is made up of the raw material of following parts by weight:
Novel anticorrosion steel band of the present invention, wherein, described B component: polyolefin base resin is one or more the mixture in high density polyethylene (HDPE), medium density polyethylene, LLDPE, low density polyethylene (LDPE), polypropylene;
Described component C: ethylenic copolymer tackifying resin is one or more the mixture in SBS, EPDM, POE, POP, EVA, SIS, SEBS;
Described D component: amorphous a-olefin copolymer be goldschmidt chemical corporation produce series be
model is one or more the amorphous Poly alpha Olefins (PAO) mixture of APAO.
Novel anticorrosion steel band of the present invention, wherein, the thickness of described FBE (2) is 0.08-0.20mm, wherein, epoxy powder is by one or more mixture in epoxy resin, polychlorostyrene alcohol, Hydrin, novolac epoxy resin, bis-phenol A glycidyl ether, bisphenol-A glycidol ether, brominated epoxy resin; The thickness of described PUR powder coating (3) is 0.15-0.30mm.
The present invention also comprises a kind of preparation method preparing above-mentioned novel anticorrosion steel band, comprises the following steps:
(1) by obtaining the smooth steel band without spot after leveling, alkali cleaning, washing;
(2) heat steel band, ebullated bed, with epoxy powder, dip-coating is carried out to the steel band after heating;
(3) steel band through dip-coating epoxy powder carries out dip-coating with PUR powder on ebullated bed;
(4) steel band through dip-coating PUR powder is delivered to baking oven insulation;
(5) completed solidification and the cooling of epoxy powder and PUR powder by air-cooled, water-cooled, after rolling, obtain novel anticorrosion steel band.
The preparation method of novel anticorrosion steel band of the present invention, wherein, described heating steel band refers to that being heated to temperature is 150-240 DEG C.
The preparation method of novel anticorrosion steel band of the present invention, wherein, also comprised and prepares PUR powder, comprising following steps before described step (1):
A, component raw material each in polycthylene grafted composition formula is weighed by proportioning after by high mixer premix, then obtain polycthylene grafted thing through double screw extruder reactive extrursion;
B, the polycthylene grafted thing claiming to prepare in step a and polyolefin base resin, ethylenic copolymer tackifying resin, amorphous a-olefin copolymer are obtained hot-melt adhesive granules by after proportioning premix through double screw extruder blending extrusion;
C, by the hot-melt adhesive granules prepared in step b by obtaining PUR powder after Mechanical Method abrasive dust.
The preparation method of novel anticorrosion steel band of the present invention, wherein, it is characterized in that, the temperature of described double screw extruder reactive extrursion is 150-240 DEG C, the temperature of described double screw extruder blending extrusion is 160-260 DEG C, screw speed 250rpm, twin-screw draw ratio L/D=35:1, the temperature of described abrasive dust is 20-60 DEG C.
Implement novel anticorrosion steel band of the present invention and preparation method thereof, there is following beneficial effect:
(1) use chemical reactivity good between epoxy powder and steel band, improve steel band and the peel strength between anticorrosive coat and bonding persistence, and then improve the service life of steel band reinforced polyethylene spiral ripple pipe.
(2) reactivity of PUR powder and epoxy powder excellence is used, using PUR powder as the even dip-coating of overcoat outside FBE, prevent epoxy powder embrittlement on the one hand, the epoxy powder layer in steel band reinforced polyethylene spiral ripple pipe and polyethylene layer effectively combine as articulamentum by PUR powder on the other hand.
(3) ebullated bed dip-coating is adopted to complete the construction of epoxy powder and PUR powder coating, this arrangement and method for construction had both improve the uniformity of coating layer thickness, prevent the possibility of steel band edge holiday, starved, turn increase the reaction probabilities of epoxy powder and PUR powder, ensure the antiseptic effect to steel band the best.
(4) in addition, this application mode equipment is simple, and energy consumption is low, adapts to the requirement of environmental protection low consumption.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing:
Fig. 1 is the cross-sectional configuration figure of the novel anticorrosion steel band of present pre-ferred embodiments.
Detailed description of the invention
Below, by reference to the accompanying drawings and detailed description of the invention, the present invention is described further:
As shown in Figure 1, a kind of novel anticorrosion steel band, comprises steel band body 1, is provided with FBE 2 on steel band body 1 surface, is provided with PUR powder coating 3 on FBE 2 surface.FBE 2 is prepared from by epoxy powder, and PUR powder coating 3 is prepared from by PUR powder.
Steel band body 1 is the one in cold-rolled strip or galvanized steel strip.Brake forming indehiscent requirement when the pliability of steel band body 1 can reach tubulation, rigidity adjusts the requirement of ring stiffness according to during concrete tubulation, and wherein galvanized steel strip is that hot dip galvanizing process is produced.
FBE 2 is formed by after epoxy powder application, epoxy powder density 1.3-1.5g/cm3, softening point 80-100 DEG C, epoxide number 0.10-0.25eq/100g, number-average molecular weight 1400-3400,200 DEG C time gel time >=12s, hardening time 0.5-3.0min, 150 μm of oversize powder≤3.0%, 250 μm of oversize powder≤0.2% on domain size distribution.The thickness of FBE 2 is 0.08-0.20mm.Wherein, epoxy powder is by one or more mixture in epoxy resin, polychlorostyrene alcohol, Hydrin, novolac epoxy resin, bis-phenol A glycidyl ether, bisphenol-A glycidol ether, brominated epoxy resin.
PUR powder coating 3 is formed by after PUR powder coating, this PUR powder melt flow rate (MFR) is 8-10g/10min, powder suspension ratio >=30%, angle of repose≤30 °, can more than 200N/cm be reached with the peel strength of epoxy powder, can natural levelability after upper powder.The thickness of PUR powder coating 3 is 0.15-0.30mm.
Wherein, PUR powder is made up of the component of following percentage by weight:
Above-mentioned component A: polycthylene grafted thing is formed by the polymerizable raw material of following percentage by weight:
Matrix resin 92-98.2%,
Grafted monomers 1.5-6.5%,
Initator 0.30-1.50%.
Above-mentioned matrix resin is made up of the raw material of following parts by weight:
Wherein, grafted monomers is one or more the mixture in maleic anhydride (MAH), acrylic acid (AA), ethyl acrylate (EA), butyl acrylate (BA); Initator is one in cumyl peroxide (DCP), benzoyl peroxide (BPO) or its mixture.
Above-mentioned B component: polyolefin base resin is made up of the component of following percentage by weight:
In described B component, the percentage by weight sum of each component is 100%.
Preferred scheme is further: the percentage by weight that described high density polyethylene (HDPE) (HDPE) accounts for polyolefin base resin is 40-85%,
High density polyethylene (HDPE) (HDPE) relative density is 0.941-0.960, and the present invention's high density polyethylene (HDPE) (HDPE) used preferably relative density is 0.948-0.955; Medium density polyethylene (MDPE) relative density is 0.926-0.953, and the present invention's high density polyethylene (HDPE) (HDPE) used preferably relative density is 0.932-0.949; LLDPE (LLDPE) relative density is 0.918-0.935, and the present invention's LLDPE (LLDPE) used preferably relative density is 0.925-0.930; Low density polyethylene (LDPE) (LDPE) relative density is 0.910-0.925, and the present invention's low density polyethylene (LDPE) (LDPE) used preferably relative density is 0.915-0.922.
Above-mentioned component C: ethylenic copolymer tackifying resin is one or more the mixture in SBS, EPDM, POE, POP, EVA, SIS, SEBS;
Above-mentioned D component: amorphous a-olefin copolymer be goldschmidt chemical corporation produce series be
model is one or more the amorphous Poly alpha Olefins (PAO) mixture of APAO.
The present invention also provides a kind of preparation method as above-mentioned novel anticorrosion steel band, specifically comprises the following steps:
(1) by obtaining the smooth steel band without spot after leveling, alkali cleaning, washing.
(2) heat steel band, heating-up temperature is 150-240 DEG C, adds epoxy powder carry out dip-coating to the steel band after heating on ebullated bed; Use chemical reactivity good between epoxy powder and steel band, improve steel band and the peel strength between anticorrosive coat and bonding persistence, and then improve the service life of steel band reinforced polyethylene spiral ripple pipe.
(3) on ebullated bed, add PUR powder through the steel band of dip-coating epoxy powder and carry out dip-coating; Epoxy powder after dip-coating is in gel state, can not solidify at once, at this moment needs the ebullated bed dip-coating carrying out hot-melt adhesive powder end before epoxy powder solidification, thus ensures the abundant reaction of epoxy powder and PUR powder.Use the reactivity of PUR powder and epoxy powder excellence, using PUR powder as the even dip-coating of overcoat outside FBE, prevent epoxy powder embrittlement on the one hand, the epoxy powder layer in steel band reinforced polyethylene spiral ripple pipe and polyethylene layer effectively combine as articulamentum by PUR powder on the other hand.
(4) steel band through dip-coating PUR powder is delivered to baking oven to be incubated at 200-220 DEG C, promote the chemical reaction of epoxy powder and PUR powder, and promote the thorough further levelling of PUR powder coating.
(5) completed solidification and the cooling of epoxy powder and PUR powder by air-cooled, water-cooled, after rolling, obtain novel anticorrosion steel band.
In the preparation method of novel anticorrosion steel band, step (3) and step (4) adopt ebullated bed dip-coating to complete the construction of epoxy powder and PUR powder coating, this arrangement and method for construction had both improve the uniformity of coating layer thickness, prevented the possibility of steel band edge holiday, starved; Turn increase the reaction probabilities of epoxy powder and PUR powder, ensure the antiseptic effect to steel band the best; In addition, this application mode equipment is simple, and energy consumption is low, adapts to the requirement of environmental protection low consumption.
Wherein, also comprised before above-mentioned steps (1) and prepare PUR powder, the preparation of this melten gel powder comprises the following steps:
A, component raw material each in polycthylene grafted composition formula is weighed by proportioning after by high mixer premix, then obtain polycthylene grafted thing through double screw extruder reactive extrursion; The reactive extrursion temperature of double screw extruder is 150-240 DEG C, screw speed 250rpm, twin-screw draw ratio L/D=35:1.
B, the polycthylene grafted thing claiming to prepare in step a, polyolefin base resin, ethylenic copolymer tackifying resin, amorphous a-olefin copolymer are obtained hot-melt adhesive granules by after proportioning premix through double screw extruder blending extrusion; Wherein, the blending extrusion temperature of double screw extruder is 160-260 DEG C, screw speed 250rpm, twin-screw draw ratio L/D=35:1.In addition, need to add appropriate antioxidant to improve ageing-resistant performance in blending extrusion process, the kind of antioxidant is one in aromatic amine antioxidant, Hinered phenols antioxidant, phosphite ester kind antioxidant or mixture, and consumption is the 0.05-2.0% of polycthylene grafted thing.
C, by the hot-melt adhesive granules prepared in step b by obtaining PUR powder after Mechanical Method abrasive dust, wherein, the temperature of abrasive dust is 20-60 DEG C.Mechanical Method milling equipment used is preferably pulverising mill disc flour mill.
Novel anticorrosion steel band prepared by the present invention, its peel strength improves more than 2 times than the peel strength of current market steel band reinforced polyethylene spiral ripple pipe steel band anticorrosive coat, and water-fast corrosive effect improves more than 10 times.This novel anticorrosion steel band improves the service life of steel band reinforced polyethylene spiral ripple pipe, reduce may exist in current the type tubing Long-Time Service process port comes unstuck, steel band exposes, the technical risk of anticorrosion effect difference.
embodiment 1
Novel anticorrosion steel band 1, comprises steel band body 1, is provided with FBE 2 on steel band body 1 surface, is provided with PUR powder coating 3 on FBE 2 surface.Steel band is cold-rolled strip, and epoxy powder is epoxy powder, and PUR powder is made up of the component of following percentage by weight:
Wherein, component A: polycthylene grafted thing is made up of the component of following percentage by weight:
HDPE：50％，MDPE：47.4％，MAH：2.0％，DCP：0.6％。
Wherein, the percent grafting of the polycthylene grafted thing of component A is 1.1%.B component: polyolefin base resin is made up of the component of following percentage by weight:
HDPE:50％，LLDPE：50％。
Component C: ethylenic copolymer tackifying resin is EVA.
D component: amorphous a-olefin copolymer is APAO.
Prepare PUR powder to comprise the following steps:
A, each component raw material in above-mentioned polycthylene grafted composition formula is weighed by proportioning after by high mixer premix, then polycthylene grafted thing is obtained through double screw extruder reactive extrursion, wherein, the extrusion temperature of double screw extruder is 150 DEG C, screw speed 250rpm, twin-screw draw ratio L/D=35:1.；
B, the polycthylene grafted thing claiming to prepare in step a, polyolefin base resin, ethylenic copolymer tackifying resin, amorphous a-olefin copolymer are obtained hot-melt adhesive granules by after proportioning premix through double screw extruder blending extrusion; Wherein, the extrusion temperature of double screw extruder is 170 DEG C, screw speed 250rpm, twin-screw draw ratio L/D=35:1.In blending extrusion process, need the aromatic amine antioxidant of interpolation 0.05% to improve ageing-resistant performance.
C, by the hot-melt adhesive granules prepared in step b by obtaining PUR powder after Mechanical Method abrasive dust, wherein, the temperature of abrasive dust is 45 DEG C.
Novel anticorrosion steel band 1 is preparation method comprise the following steps:
(1) by obtaining the smooth steel band without spot after leveling, alkali cleaning, washing.
(2) heat steel band, heating-up temperature is 210 DEG C, and what on ebullated bed, add epoxy powder to the steel band after heating carries out dip-coating, and the THICKNESS CONTROL of epoxy powder is at 0.15mm;
(3) on ebullated bed, add the above-mentioned PUR powder prepared through the steel band of dip-coating epoxy powder and carry out dip-coating, the THICKNESS CONTROL of PUR powder is at 0.20mm;
(4) steel band through dip-coating PUR powder is delivered to the insulation of 200 DEG C, baking oven, promote the further chemical reaction of epoxy powder and PUR powder.
(5) completed solidification and the cooling of epoxy powder and PUR powder by air-cooled, water-cooled, after rolling, obtain novel anticorrosion steel band 1.
embodiment 2
Novel anticorrosion steel band 2, comprises steel band body 1, is provided with FBE 2 on steel band body 1 surface, is provided with PUR powder coating 3 on FBE 2 surface.Steel band is galvanizing steel band, and epoxy powder is epoxy resin, and the component proportion of PUR powder is identical with the component proportion of the PUR powder in embodiment 1.
The preparation method preparing PUR powder is identical with PUR powder preparation method in embodiment 1.
The preparation technology of novel anticorrosion steel band 2 adopts and prepares identical with the technique in embodiment 1.
embodiment 3
Novel anticorrosion steel band 3, comprises steel band body 1, is provided with FBE 2 on steel band body 1 surface, is provided with PUR powder coating 3 on FBE 2 surface.Steel band is galvanizing steel band, and epoxy powder is novolac epoxy resin, and PUR powder is made up of the component of following percentage by weight:
Wherein, component A: polycthylene grafted thing is made up of the component of following percentage by weight:
HDPE：60％，MDPE：20％，LLDPE：14.5％，PP：3.0％，MAH：2.0％，DCP：0.5％。
Wherein, the percent grafting of the polycthylene grafted thing of component A is 1.1%.
B component: polyolefin base resin is made up of the component of following percentage by weight:
HDPE：20％，LLDPE：50％，MDPE：30％。
Component C: ethylenic copolymer tackifying resin is made up of the component of following percentage by weight:
POE：60％，SBS：40％。
D component: amorphous a-olefin copolymer is APAO.
Prepare PUR powder to comprise the following steps:
A, each component raw material in above-mentioned polycthylene grafted composition formula is weighed by proportioning after by high mixer premix, then obtain polycthylene grafted thing through double screw extruder reactive extrursion;
B, the polycthylene grafted thing claiming to prepare in step a, polyolefin base resin, ethylenic copolymer tackifying resin, amorphous a-olefin copolymer are obtained hot-melt adhesive granules by after proportioning premix through double screw extruder blending extrusion; Wherein, the extrusion temperature of double screw extruder is 200 DEG C, screw speed 250rpm, twin-screw draw ratio L/D=35:1.In blending extrusion process, need the aromatic amine antioxidant of interpolation 0.05% to improve ageing-resistant performance.
C, by the hot-melt adhesive granules prepared in step b by obtaining PUR powder after Mechanical Method abrasive dust, wherein, the temperature of abrasive dust is 60 DEG C.
The preparation technology of novel anticorrosion steel band 3 adopts and prepares identical with the technique in embodiment 1.
comparative example
The present embodiment is anticorrosion steel band conventional in prior art and preparation process thereof.Steel band selects cold-rolled strip, through unreeling, alkali cleaning, removes surface blot after washing, through thermatron and baking oven heater by cleaned steel strip surface heating temperatures to 230 DEG C.Adopt extruder to be coated on steel band by commodity adhering resin, now the thickness of adhering resin is 0.60mm.Next completed the cooling of adhering resin layer by air-cooled, water-cooled, after rolling, obtain anticorrosion steel band anticorrosion 4.The anticorrosion structure of the anticorrosion steel band 4 that above preparation method is formed is followed successively by from inside to outside: adhering resin, cold-rolled strip, adhering resin.
The anticorrosion steel band prepared by above-described embodiment 1-4 is applied to production steel band reinforced polyethylene spiral ripple pipe, and the performance of its anticorrosion steel band and production tube sees the following form 1.
The anticorrosion steel band of table 1: embodiment 1-4 and production tube the performance test results
From in table 1, compared with anticorrosion steel band of the prior art and production tube thereof, the novel anticorrosion steel band adopting the method preparing anticorrosion steel band in the present invention to prepare and production tube peel strength thereof improve more than 2 times, and water-fast corrosive effect improves more than 10 times.After this novel anticorrosion steel band applies to steel band reinforced polyethylene spiral ripple pipe, improve the service life of tubing, reduce may exist in current the type pipe end Long-Time Service process come unstuck, steel band exposes, the technical risk of anticorrosion effect difference.
To one skilled in the art, according to technical scheme described above and design, other various corresponding change and deformation can be made, and all these change and deformation all should belong within the protection domain of the claims in the present invention.
Claims (10)
1. a novel anticorrosion steel band, comprise steel band body (1), it is characterized in that, be provided with FBE (2) on steel band body (1) surface, be provided with PUR powder coating (3) on FBE (2) surface; FBE (2) is prepared from by epoxy powder, and PUR powder coating (3) is prepared from by PUR powder.
2. novel anticorrosion steel band according to claim 1, is characterized in that, described PUR powder is made up of the component of following percentage by weight:
3. novel anticorrosion steel band according to claim 2, is characterized in that, described component A: polycthylene grafted thing is formed by the polymerizable raw material of following percentage by weight:
Matrix resin 92-98.2%,
Grafted monomers 1.5-6.5%,
Initator 0.30-1.50%;
Wherein, described matrix resin is one or more the mixture in polyethylene, ethylenic copolymer, polypropylene, described grafted monomers is one or more the mixture in maleic anhydride, acrylic acid, ethyl acrylate, butyl acrylate, and described initator is one in cumyl peroxide, benzoyl peroxide or its mixture.
4. novel anticorrosion steel band according to claim 3, is characterized in that, described matrix resin is made up of the raw material of following parts by weight:
5. novel anticorrosion steel band according to claim 2, is characterized in that,
Described B component: polyolefin base resin is one or more the mixture in high density polyethylene (HDPE), medium density polyethylene, LLDPE, low density polyethylene (LDPE), polypropylene;
Described component C: ethylenic copolymer tackifying resin is one or more the mixture in SBS, EPDM, POE, POP, EVA, SIS, SEBS;
Described D component: amorphous a-olefin copolymer be goldschmidt chemical corporation produce series be
model is one or more the amorphous Poly alpha Olefins (PAO) mixture of APAO.
6. novel anticorrosion steel band according to claim 1, it is characterized in that, the thickness of described FBE (2) is 0.08-0.20mm, wherein, epoxy powder is by one or more mixture in epoxy resin, polychlorostyrene alcohol, Hydrin, novolac epoxy resin, bis-phenol A glycidyl ether, bisphenol-A glycidol ether, brominated epoxy resin; The thickness of described PUR powder coating (3) is 0.15-0.30mm.
7. a preparation method for the novel anticorrosion steel band as described in as arbitrary in claim 1-6, is characterized in that specifically comprising the following steps:
(1) by obtaining the smooth steel band without spot after leveling, alkali cleaning, washing;
(2) heat steel band, ebullated bed, with epoxy powder, dip-coating is carried out to the steel band after heating;
(3) steel band through dip-coating epoxy powder carries out dip-coating with PUR powder on ebullated bed;
(4) steel band through dip-coating PUR powder is delivered to baking oven insulation;
(5) completed solidification and the cooling of epoxy powder and PUR powder by air-cooled, water-cooled, after rolling, obtain novel anticorrosion steel band.
8. the preparation method of novel anticorrosion steel band according to claim 7, is characterized in that, described heating steel band refers to that being heated to temperature is 150-240 DEG C.
9. the preparation method of novel anticorrosion steel band according to claim 7, is characterized in that, also comprises and prepared PUR powder, comprising following steps before described step (1):
A, component raw material each in polycthylene grafted composition formula is weighed by proportioning after by high mixer premix, then obtain polycthylene grafted thing through double screw extruder reactive extrursion;
B, the polycthylene grafted thing claiming to prepare in step a and polyolefin base resin, ethylenic copolymer tackifying resin, amorphous a-olefin copolymer are obtained hot-melt adhesive granules by after proportioning premix through double screw extruder blending extrusion;
C, by the hot-melt adhesive granules prepared in step b by obtaining PUR powder after Mechanical Method abrasive dust.
10. the preparation method of novel anticorrosion steel band according to claim 9, it is characterized in that, the temperature of described double screw extruder reactive extrursion is 150-240 DEG C, the temperature of described double screw extruder blending extrusion is 160-260 DEG C, screw speed 250rpm, twin-screw draw ratio L/D=35:1, the temperature of described abrasive dust is 20-60 DEG C.
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| CN110486573A (en) * | 2019-08-23 | 2019-11-22 | 重庆金智燃管件有限公司 | Steel special piece surface anticorrosion structure and its construction method |
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