CN105238287B - Polyethylene heat-shrinkable tape capable of being applied in low-temperature environment - Google Patents
Polyethylene heat-shrinkable tape capable of being applied in low-temperature environment Download PDFInfo
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- CN105238287B CN105238287B CN201510655624.1A CN201510655624A CN105238287B CN 105238287 B CN105238287 B CN 105238287B CN 201510655624 A CN201510655624 A CN 201510655624A CN 105238287 B CN105238287 B CN 105238287B
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- temperature
- polyethylene
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- 229920000573 polyethylene Polymers 0.000 title claims abstract description 29
- 239000004698 Polyethylene Substances 0.000 title claims abstract description 27
- -1 Polyethylene Polymers 0.000 title claims abstract description 25
- 239000000463 material Substances 0.000 claims abstract description 15
- 239000000565 sealant Substances 0.000 claims abstract description 14
- 229920003020 cross-linked polyethylene Polymers 0.000 claims abstract description 11
- 239000004703 cross-linked polyethylene Substances 0.000 claims abstract description 11
- 238000001125 extrusion Methods 0.000 claims abstract description 3
- 238000000034 method Methods 0.000 claims abstract description 3
- 230000008602 contraction Effects 0.000 claims description 17
- 239000012530 fluid Substances 0.000 claims description 11
- 229920001903 high density polyethylene Polymers 0.000 claims description 8
- 239000004700 high-density polyethylene Substances 0.000 claims description 8
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 6
- 239000003963 antioxidant agent Substances 0.000 claims description 4
- 230000003078 antioxidant effect Effects 0.000 claims description 4
- 229920005549 butyl rubber Polymers 0.000 claims description 4
- 238000004898 kneading Methods 0.000 claims description 4
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 claims description 4
- 239000004594 Masterbatch (MB) Substances 0.000 claims description 3
- 229920002367 Polyisobutene Polymers 0.000 claims description 3
- 238000004132 cross linking Methods 0.000 claims description 3
- 238000002464 physical blending Methods 0.000 claims description 3
- 230000005855 radiation Effects 0.000 claims description 3
- 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 2
- 238000005266 casting Methods 0.000 claims description 2
- 229920000098 polyolefin Polymers 0.000 claims description 2
- 238000002360 preparation method Methods 0.000 claims description 2
- 238000010792 warming Methods 0.000 claims description 2
- 239000005038 ethylene vinyl acetate Substances 0.000 claims 1
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 claims 1
- 230000008014 freezing Effects 0.000 abstract description 5
- 238000007710 freezing Methods 0.000 abstract description 5
- 238000005336 cracking Methods 0.000 abstract 1
- 238000010345 tape casting Methods 0.000 abstract 1
- 230000009172 bursting Effects 0.000 description 3
- 239000004593 Epoxy Substances 0.000 description 2
- BGYHLZZASRKEJE-UHFFFAOYSA-N [3-[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxy]-2,2-bis[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxymethyl]propyl] 3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoate Chemical compound CC(C)(C)C1=C(O)C(C(C)(C)C)=CC(CCC(=O)OCC(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)=C1 BGYHLZZASRKEJE-UHFFFAOYSA-N 0.000 description 2
- 230000002421 anti-septic effect Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 239000012943 hotmelt Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- 229920006124 polyolefin elastomer Polymers 0.000 description 2
- 230000037452 priming Effects 0.000 description 2
- ODLMAHJVESYWTB-UHFFFAOYSA-N propylbenzene Chemical compound CCCC1=CC=CC=C1 ODLMAHJVESYWTB-UHFFFAOYSA-N 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- KWKAKUADMBZCLK-UHFFFAOYSA-N 1-octene Chemical compound CCCCCCC=C KWKAKUADMBZCLK-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 150000001335 aliphatic alkanes Chemical class 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 238000007766 curtain coating Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003999 initiator Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 230000001404 mediated effect Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000037361 pathway Effects 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Landscapes
- Package Frames And Binding Bands (AREA)
- Sealing Material Composition (AREA)
Abstract
The invention discloses a polyethylene heat-shrinkable tape capable of being applied in a low-temperature environment, which solves the problem that the existing polyethylene heat-shrinkable tape becomes brittle at the temperature of below-15 ℃ and cannot be applied. The product is compounded by using a low-temperature viscoelastic sealant and a low-temperature crosslinked polyethylene base material through an extrusion or tape casting method. The polyethylene heat-shrinkable tape can be stored, transported and installed and constructed in a low-temperature environment, and the low-temperature polyethylene heat-shrinkable tape installed on a pipeline can be placed in a low-temperature open air environment without low-temperature freezing damage risks such as frost cracking and the like.
Description
Technical field
The present invention relates to a kind of polyethylene thermal contraction straps, are mainly used for protecting outside steel pipe Crater antiseptic repaired mouth and insulating tube
Layer waterproof repaired mouth.
Background technology
Polyethylene thermal contraction strap is widely used pipeline corrosion protection opening-supplementing material and anticorrosion coating on pipeline repair materials, it is
It is combined by radiant crosslinked polyethylene base material and hot-melt sealant.However, common polyethylene thermal contraction strap is in environment temperature
It will become fragile during less than -15 DEG C, lead to not apply;Polyethylene thermal contraction strap on pipeline has been mounted on it at low ambient temperatures
It can be caused by bursting by freezing using failure.
With the construction of China's energy source pathway, some pipelines needs are laid under psychro-environment, and environment temperature is far below -15
DEG C, it is therefore desirable to invent it is a kind of can be in the low form polyethylene thermal contraction strap that low temperature environment is applied.
Invention content
The object of the present invention is to provide a kind of polyethylene thermal contraction strap that can be applied at low ambient temperatures, application environment temperature
It is minimum can be to -35 DEG C.Low form polyethylene thermal contraction strap provided by the present invention can carry out storage and transportation and installation at low ambient temperatures
Construction, eliminate common polythene shrink belt at low ambient temperatures easy embrittlement the shortcomings that;Mounted low form polyethylene heat
Bursting by freezing danger will not occur at -35 DEG C or more for shrinkage band.
In order to achieve the above-mentioned object of the invention, the technical solution adopted by the present invention is:
A kind of polyethylene thermal contraction strap that can be applied at low ambient temperatures, preparation method are:
(1)Manufacture low form viscoplasticity fluid sealant:Butyl rubber, polyolefin these matrix resins are added in after mixing
Initiator and maleic anhydride continue modification and are grafted;
(2)Manufacture low form crosslinked polyethylene base material:High density polyethylene (HDPE) is granulated with modifying agent through physical blending, through squeezing
Crosslinking with radiation is carried out after going out to form;
(3)It is compounded to form with low form crosslinked polyethylene base material by squeezing out casting method by low temperature viscoplasticity fluid sealant low
Warm type polyethylene thermal contraction strap.
Further, step in technical solution of the present invention(1)The low form viscoplasticity fluid sealant, in parts by weight
It calculates, the second that 0~30 part of the polyisobutene for being by 100 parts of butyl rubber, molecular weight 40000~80000, VA contents are 15%~28%
Alkene-vinyl acetate co-polymer EVA45~100 part is warming up to 130~150 DEG C after kneading or mixing, and it is different to add in peroxidating two
0.1~0.5 part of propyl benzene, 1.0~3.0 parts of maleic anhydride after mediating 10-30 minutes, add in 0.1~0.6 part of antioxidant, ring
5~30 parts of alkane oil, 5~50 parts of Petropols are mediated.
Further, step in technical solution of the present invention(2)The low form crosslinked polyethylene base material, according to parts by weight
It calculates, by 100 parts of high density polyethylene (HDPE), 5~35 parts of polyolefin elastomer, 0.5~2.5 part of black masterbatch, antioxidant 0.1~2.0
Part, after being granulated by physical blending, extruded machine extrusion molding is band, and crosslinking by radiation forms.
Compared with prior art, the present invention has the following advantages:
1. different using hot-melt sealant from common polythene shrink belt, low form polyethylene of the invention is heat-shrinked
Band can make fluid sealant brittle temperature be down to -35 DEG C hereinafter, the low temperature viscoplasticity of the present invention is close using low form viscoplasticity fluid sealant
Sealing significantly improves the cryogenic property of fluid sealant;
2. different from traditional crosslinked polyethylene base material that common polythene shrink belt uses, low form heat of the present invention is received
Contracting band is using low form crosslinked polyethylene base material, which can resist and relax freezing shrinkage internal stress so that base material brittle failure temperature
It is greatly lowered;
3. the technical program to composition low form polyethylene thermal contraction strap by having excellent low temperature comprehensive performance.With
Conventional polyethylene shrink belt is compared, and low form polyethylene thermal contraction strap can be in low temperature environment(- 35 DEG C or more)Lower progress storage and transportation,
Installation, the low form polyethylene thermal contraction strap on pipeline can be placed under low temperature open-air atmosphere, Bu Huifa
The low temperature freezing-disasters such as raw bursting by freezing are dangerous.
With reference to embodiment, the present invention is described further.
Embodiment 1
1. manufacture low form viscoplasticity fluid sealant:Butyl rubber (IIR1751) 100 is added in mixer(Parts by weight, with
Similarly hereinafter), polyisobutene(Molecular weight 50000)30、EVA1850(VA contents 28%)75, after kneading or mixing temperature control to 140 ±
10 DEG C, add in cumyl peroxide(DCP)0.1st, maleic anhydride(MAH)1.0, after mediating 15 minutes, add in antioxidant 1010
0.5th, naphthenic oil 20, C5 Petropols 35, then mediate or mixing 10 minutes to get.
The product has the following performance:Softening point is more than 105 DEG C;Brittle temperature is less than -35 DEG C;Shear strength(23
℃)More than 0.5MPa;Peel strength(PE/ non-solvent epoxy priming paint)More than 70N/cm.
2. manufacture low form crosslinked polyethylene base material:High density polyethylene (HDPE) 100 is added in batch mixer(Parts by weight, similarly hereinafter),
Polyolefin elastomer octene content(15% )15, black masterbatch 1.5, antioxidant 1010 0.6, irgasfos 168 0.4, mixing is
It is even after be granulated, after drying extruder for shaping be thickness 1.0~2.5mm continuous sheets, with high-energy electron accelerator into
Row irradiation dose 400KGy to get.
The product has the following performance:Tensile strength is more than 20MPa, and elongation at break is more than 500%, brittle temperature
Less than -90 DEG C, Vicat softening point is more than 95 DEG C, and the temperature that fractures after frost is less than -35 DEG C.
3. after the extruded machine melting of above-mentioned low temperature viscoplasticity fluid sealant, curtain coating is squeezed out in above-mentioned low form crosslinked polyethylene
On base material, low form polyethylene thermal contraction strap is combined into polyethylene base material under viscoplasticity fluid sealant molten condition.
Gained low form polyethylene thermal contraction strap has cryogenic property following prominent, and can meet conventional pipeline corrosion protection
It is required that:Low temperature flexibility is led to by -35 DEG C of tests, low temperature uncoiling performance by -35 DEG C of tests, cryogenic box frost breakdown test
- 35 DEG C of tests are crossed, other antiseptic properties meet the requirement of GB/T 23257-2009 standards.
The final products of gained can be directly used for pipeline corrosion-resistanting interpolating port under low temperature environment, also can be with non-solvent epoxy priming paint
It matches, for pipeline corrosion-resistanting interpolating port under low temperature environment.
Claims (1)
1. a kind of polyethylene thermal contraction strap that can be applied at low ambient temperatures, preparation method are:
(1)Manufacture low form viscoplasticity fluid sealant:Calculate in parts by weight, by 100 parts of butyl rubber, molecular weight 40000~
Ethylene-vinyl acetate copolymer EVA45~100 part that 80000 0~30 part of the polyisobutene for being, VA contents are 15%~28%,
130~150 DEG C are warming up to after kneading or mixing, adds in 0.1~0.5 part of cumyl peroxide, maleic anhydride 1.0~3.0
Part, after mediating 10-30 minutes, add in 5~50 parts of 0.1~0.6 part of antioxidant, 5~30 parts of naphthenic oil, Petropols kneadings
It forms;
(2)Manufacture low form crosslinked polyethylene base material:It calculates in parts by weight, by 100 parts of high density polyethylene (HDPE), polyolefin elastic
5~35 parts of body, 0.5~2.5 part of black masterbatch, 0.1~2.0 part of antioxidant, after being granulated by physical blending, extruded machine is extruded into
Type is band, and crosslinking by radiation forms;
(3)Low temperature viscoplasticity fluid sealant and low form crosslinked polyethylene base material are compounded to form by low temperature by extrusion or casting method
Type polyethylene thermal contraction strap.
Priority Applications (1)
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CN201510655624.1A CN105238287B (en) | 2015-10-12 | 2015-10-12 | Polyethylene heat-shrinkable tape capable of being applied in low-temperature environment |
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CN201510655624.1A CN105238287B (en) | 2015-10-12 | 2015-10-12 | Polyethylene heat-shrinkable tape capable of being applied in low-temperature environment |
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CN105238287A CN105238287A (en) | 2016-01-13 |
CN105238287B true CN105238287B (en) | 2018-06-26 |
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CN201510655624.1A Active CN105238287B (en) | 2015-10-12 | 2015-10-12 | Polyethylene heat-shrinkable tape capable of being applied in low-temperature environment |
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CN108977101A (en) * | 2018-08-15 | 2018-12-11 | 江苏宝力泰新材料科技有限公司 | A kind of external protective material and preparation method thereof for aerial pipeline |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103087385A (en) * | 2012-11-23 | 2013-05-08 | 深圳市长园长通新材料有限公司 | High-density high-temperature heat-shrinkable pressure-sensitive tape and preparation method thereof |
CN104479592A (en) * | 2014-12-15 | 2015-04-01 | 江苏达胜热缩材料有限公司 | Low-temperature 2PE hot melt adhesive and preparation method thereof |
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2015
- 2015-10-12 CN CN201510655624.1A patent/CN105238287B/en active Active
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103087385A (en) * | 2012-11-23 | 2013-05-08 | 深圳市长园长通新材料有限公司 | High-density high-temperature heat-shrinkable pressure-sensitive tape and preparation method thereof |
CN104479592A (en) * | 2014-12-15 | 2015-04-01 | 江苏达胜热缩材料有限公司 | Low-temperature 2PE hot melt adhesive and preparation method thereof |
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