CN105238287A - 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
- Publication number
- CN105238287A CN105238287A CN201510655624.1A CN201510655624A CN105238287A CN 105238287 A CN105238287 A CN 105238287A CN 201510655624 A CN201510655624 A CN 201510655624A CN 105238287 A CN105238287 A CN 105238287A
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- China
- Prior art keywords
- low temperature
- low
- polyethylene
- parts
- temperature modification
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- Granted
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- 229920000573 polyethylene Polymers 0.000 title claims abstract description 33
- 239000004698 Polyethylene Substances 0.000 title claims abstract description 31
- -1 Polyethylene Polymers 0.000 title claims abstract description 30
- 239000000463 material Substances 0.000 claims abstract description 17
- 229920003020 cross-linked polyethylene Polymers 0.000 claims abstract description 12
- 239000004703 cross-linked polyethylene Substances 0.000 claims abstract description 12
- 238000000034 method Methods 0.000 claims abstract description 3
- 230000004048 modification Effects 0.000 claims description 27
- 238000012986 modification Methods 0.000 claims description 27
- 230000008602 contraction Effects 0.000 claims description 21
- 229920001903 high density polyethylene Polymers 0.000 claims description 6
- 239000004700 high-density polyethylene Substances 0.000 claims description 6
- VHOQXEIFYTTXJU-UHFFFAOYSA-N Isobutylene-isoprene copolymer Chemical group CC(C)=C.CC(=C)C=C VHOQXEIFYTTXJU-UHFFFAOYSA-N 0.000 claims description 5
- 229920002367 Polyisobutene Polymers 0.000 claims description 5
- 229920001971 elastomer Polymers 0.000 claims description 5
- 238000005469 granulation Methods 0.000 claims description 5
- 230000003179 granulation Effects 0.000 claims description 5
- 229920005989 resin Polymers 0.000 claims description 5
- 239000011347 resin Substances 0.000 claims description 5
- 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 4
- 238000004132 cross linking Methods 0.000 claims description 4
- 239000003112 inhibitor Substances 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
- 230000003647 oxidation Effects 0.000 claims description 4
- 238000007254 oxidation reaction Methods 0.000 claims description 4
- 238000002464 physical blending Methods 0.000 claims description 4
- 230000005855 radiation Effects 0.000 claims description 4
- 239000004594 Masterbatch (MB) Substances 0.000 claims description 3
- 239000003208 petroleum Substances 0.000 claims description 3
- 229920006124 polyolefin elastomer Polymers 0.000 claims description 3
- 238000007493 shaping process Methods 0.000 claims description 3
- 239000000654 additive Substances 0.000 claims description 2
- 230000000996 additive effect Effects 0.000 claims description 2
- 238000005266 casting Methods 0.000 claims description 2
- 239000003795 chemical substances by application Substances 0.000 claims description 2
- 239000005038 ethylene vinyl acetate Substances 0.000 claims description 2
- 238000004898 kneading Methods 0.000 claims description 2
- 239000011159 matrix material Substances 0.000 claims description 2
- 229920001200 poly(ethylene-vinyl acetate) Polymers 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
- 230000008014 freezing Effects 0.000 abstract description 7
- 238000007710 freezing Methods 0.000 abstract description 7
- 239000000565 sealant Substances 0.000 abstract description 3
- 238000005336 cracking Methods 0.000 abstract 1
- 238000001125 extrusion Methods 0.000 abstract 1
- 238000010345 tape casting Methods 0.000 abstract 1
- 238000005260 corrosion Methods 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 4
- 230000009172 bursting Effects 0.000 description 3
- 239000000047 product Substances 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
- 239000012467 final product Substances 0.000 description 2
- 239000012943 hotmelt Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- 230000037452 priming Effects 0.000 description 2
- 239000002904 solvent Substances 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
- 230000015556 catabolic process Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010276 construction Methods 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
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 230000037361 pathway Effects 0.000 description 1
- 238000010008 shearing 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 strap, be mainly used in steel pipe Crater antiseptic repaired mouth and insulating pipe outer jacket waterproof repaired mouth.
Background technology
Polyethylene thermal contraction strap is the pipeline corrosion protection opening-supplementing material and anticorrosion coating on pipeline repair materials widely applied, and it is composited by radiant crosslinked polyethylene base material and hot-melt sealant.But common polyethylene thermal contraction strap will become fragile lower than when-15 DEG C in envrionment temperature, cause applying; The polyethylene thermal contraction strap be arranged on pipeline also can be caused applying unsuccessfully by bursting by freezing at low ambient temperatures.
Along with the construction of China's energy source pathway, some pipelines need to lay under psychro-environment, and envrionment temperature, far below-15 DEG C, therefore needs to invent a kind of low temperature modification polyethylene thermal contraction strap can applied at low temperature environment.
Summary of the invention
The object of this invention is to provide a kind of polyethylene thermal contraction strap that can apply at low ambient temperatures, applied environment temperature is minimum can to-35 DEG C.Low temperature modification polyethylene thermal contraction strap provided by the present invention, can carry out accumulating and installation at low ambient temperatures, eliminates the shortcoming of common polythene shrink belt easily embrittlement at low ambient temperatures; Bursting by freezing danger can not be there is in mounted low temperature modification polyethylene thermal contraction strap more than-35 DEG C.
In order to realize foregoing invention object, the technical solution used in the present invention is:
The polyethylene thermal contraction strap that can apply at low ambient temperatures, its preparation method is:
(1) low temperature modification visco-elasticity seal gum is manufactured: isoprene-isobutylene rubber, polyisobutene, these matrix resins of polyolefine are passed through with additive to mix, modify and graft forms;
(2) low temperature modification crosslinked polyethylene base material is manufactured: by the polyethylene of the suitable trade mark or performance and properties-correcting agent through physical blending granulation, after extruding, carry out radiation crosslinking form;
(3) by extrude or low temperature visco-elasticity seal gum and low temperature modification crosslinked polyethylene base material are compounded to form low temperature modification polyethylene thermal contraction strap by casting method.
Further, low temperature modification visco-elasticity seal gum in technical solution of the present invention described in step (1), according to listed as parts by weight, by isoprene-isobutylene rubber 100 parts, the polyisobutene that molecular weight 40000 ~ 80000 is 0 ~ 30 part, VA content is ethylene-vinyl acetate copolymer EVA45 ~ 100 part of 15% ~ 28%, through mediating or being warming up to 130 ~ 150 DEG C after banburying, add dicumyl peroxide 0.1 ~ 0.5 part, maleic anhydride 1.0 ~ 3.0 parts, after mediating 10-30 minutes, add 0.1 ~ 0.6 part, oxidation inhibitor, naphthenic oil 5 ~ 30 parts, petroleum resin 5 ~ 50 parts of kneadings form.
Further, low temperature modification crosslinked polyethylene base material in technical solution of the present invention described in step (2), according to listed as parts by weight, by high density polyethylene(HDPE) 100 parts, polyolefin elastomer 5 ~ 35 parts, black masterbatch 0.5 ~ 2.5 part, 0.1 ~ 2.0 part, oxidation inhibitor, after physical blending granulation, be band through extruder for shaping, and form through radiation crosslinking.
Compared with prior art, the present invention has the following advantages:
1. adopt hot-melt sealant different from common polythene shrink belt, low temperature modification polyethylene thermal contraction strap of the present invention adopts low temperature modification visco-elasticity seal gum, seal gum embrittlement temperature can be made to be down to less than-35 DEG C, and low temperature visco-elasticity seal gum of the present invention significantly improves the low-temperature performance of seal gum;
2. the traditional crosslinked polyethylene base material adopted from common polythene shrink belt is different, and low temperature modification shrink belt of the present invention adopts low temperature modification crosslinked polyethylene base material, and this base material can be resisted and lax freezing shrinkage internal stress, and base material brittle failure temperature is significantly reduced;
3. the technical program is by having excellent low temperature over-all properties to composition low temperature modification polyethylene thermal contraction strap.Compared with conventional polyethylene shrink belt, low temperature modification polyethylene thermal contraction strap can carry out accumulating, installation under low temperature environment (more than-35 DEG C), the low temperature modification polyethylene thermal contraction strap be arranged on pipeline can be placed under low temperature open-air atmosphere, the low temperature freezing-disasters such as bursting by freezing can not occur dangerous.
Below in conjunction with embodiment, the present invention is described further.
Embodiment 1
1. low temperature modification visco-elasticity seal gum is manufactured: in Banbury mixer, add isoprene-isobutylene rubber (IIR1751) 100(weight part, as follows), polyisobutene (molecular weight 50000) 30, EVA1850(VA content 28%) 75, through mediating or temperature control to 140 ± 10 DEG C after banburying, add dicumyl peroxide (DCP) 0.1, maleic anhydride (MAH) 1.0, mediate after 15 minutes, add antioxidant 1010 0.5, naphthenic oil 20, C5 petroleum resin 35, then mediate or banburying 10 minutes, to obtain final product.
This product has following performance: softening temperature is greater than 105 DEG C; Brittle temperature is less than-35 DEG C; Shearing resistance (23 DEG C) is greater than 0.5MPa; Stripping strength (PE/ non-solvent epoxy priming paint) is greater than 70N/cm.
2. low temperature modification crosslinked polyethylene base material is manufactured: add high density polyethylene(HDPE) 100(weight part at mixer, lower same), polyolefin elastomer octene content (15%) 15, black masterbatch 1.5, antioxidant 1010 0.6, irgasfos 168 0.4, mix rear granulation, be thickness 1.0 ~ 2.5mm continuous sheet in extruder for shaping after drying, carry out irradiation dose 400KGy with high-energy electron accelerator, to obtain final product.
This product has following performance: tensile strength is greater than 20MPa, and elongation at break is greater than 500%, and brittle temperature is less than-90 DEG C, and Vicat softening point is greater than 95 DEG C, and the temperature that fractures after freezing is less than-35 DEG C.
3. by above-mentioned low temperature visco-elasticity seal gum after forcing machine melting, extrude curtain coating on above-mentioned low temperature modification crosslinked polyethylene base material, under visco-elasticity seal gum molten state, be combined into low temperature modification polyethylene thermal contraction strap with polyethylene base material.
Gained low temperature modification polyethylene thermal contraction strap has following outstanding low-temperature performance, and conventional pipeline corrosion protection requirement can be met: low temperature flexibility passes through-35 DEG C of tests, low temperature uncoiling performance passes through-35 DEG C of tests,-35 DEG C of tests are passed through in the freezing breakdown test of cryostat, and other antiseptic properties meet GB/T23257-2009 standard-required.
The finished product of gained, can be directly used in pipeline corrosion protection repaired mouth under low temperature environment, also can support the use with non-solvent epoxy priming paint, for pipeline corrosion protection repaired mouth under low temperature environment.
Claims (3)
1. the polyethylene thermal contraction strap can applied at low ambient temperatures, its preparation method is:
(1) low temperature modification visco-elasticity seal gum is manufactured: isoprene-isobutylene rubber, polyisobutene, these matrix resins of polyolefine are passed through with additive to mix, modify and graft forms;
(2) low temperature modification crosslinked polyethylene base material is manufactured: by the polyethylene of the suitable trade mark or performance and properties-correcting agent through physical blending granulation, after extruding, carry out radiation crosslinking form;
(3) by extrude or low temperature visco-elasticity seal gum and low temperature modification crosslinked polyethylene base material are compounded to form low temperature modification polyethylene thermal contraction strap by casting method.
2. the polyethylene thermal contraction strap that can apply at low ambient temperatures according to claim 1, it is characterized in that: the low temperature modification visco-elasticity seal gum described in step (1), according to listed as parts by weight, by isoprene-isobutylene rubber 100 parts, the polyisobutene that molecular weight 40000 ~ 80000 is 0 ~ 30 part, VA content is ethylene-vinyl acetate copolymer EVA45 ~ 100 part of 15% ~ 28%, through mediating or being warming up to 130 ~ 150 DEG C after banburying, add dicumyl peroxide 0.1 ~ 0.5 part, maleic anhydride 1.0 ~ 3.0 parts, after mediating 10-30 minutes, add 0.1 ~ 0.6 part, oxidation inhibitor, naphthenic oil 5 ~ 30 parts, petroleum resin 5 ~ 50 parts of kneadings form.
3. the polyethylene thermal contraction strap that can apply at low ambient temperatures according to claim 1, it is characterized in that: the low temperature modification crosslinked polyethylene base material described in step (2), according to listed as parts by weight, by high density polyethylene(HDPE) 100 parts, polyolefin elastomer 5 ~ 35 parts, black masterbatch 0.5 ~ 2.5 part, 0.1 ~ 2.0 part, oxidation inhibitor, after physical blending granulation, be band through extruder for shaping, and form through radiation crosslinking.
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 true CN105238287A (en) | 2016-01-13 |
CN105238287B 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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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
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CN105238287B (en) | 2018-06-26 |
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