CN102709007A - Thermal setted coextruded heat shrinkable sleeving and method for producing same - Google Patents
Thermal setted coextruded heat shrinkable sleeving and method for producing same Download PDFInfo
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- CN102709007A CN102709007A CN2012102397153A CN201210239715A CN102709007A CN 102709007 A CN102709007 A CN 102709007A CN 2012102397153 A CN2012102397153 A CN 2012102397153A CN 201210239715 A CN201210239715 A CN 201210239715A CN 102709007 A CN102709007 A CN 102709007A
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Abstract
A thermal setted coextruded heat shrinkable sleeving comprises a reaction type hot melting adhesive inner layer (10), wherein an outer layer is a thermal shrinkage layer (20) which takes thermoplastics type polyolefin as a main material. The reaction type hot melting adhesive inner layer and the thermal shrinkage outer layer are coextruded into a composite sleeving, a high-energy electron accelerator is used to irradiate the sleeving, only the material of the outer layer is controlled for cross bonding, and the material of the inner layer is not cross bonded. The thermal setted coextruded heat shrinkable sleeving in the invention can completely substitute a common hotmelt double-walled heat-shrinkable sleeving under high temperature, high humidity, acid, alkali and other special working environments, so the insulation, sealing, moistureproof and shockproof effects are improved, moreover, the special materials of the inner layer and the outer layer belong to environmental protection materials, and the harmful substances and heavy metal control provisions of the Restriction of the use of Certain Hazardous Substances in Electrical and Electronic Equipment (ROSH) of the European union are satisfied.
Description
Technical field
The present invention relates to insulating material, particularly be used for the insulating material of electric connection place insulated enclosure.
Background technology
At present; Do not see the research and development report of thermosetting composite type heat Heat-Shrinkable Tubings both at home and abroad; Though heat curing-type PUR product is arranged on the market, like reaction type polyurethane hot-melt adhesive, response type epoxy resin PUR etc., exist coated object with ambient temperature raise cause seal failure, insulation to descend, vibration comes off and safe mass problem such as reliability reduction; Use and can't refer in the special producing technology of thermal shrinkage type double wall casing, its application has significant limitation.
Summary of the invention
The present invention adopts the PUR internal layer to add the mode of thermoplastics type's outer layer of polyethene through coextrusion mold for solving the problems of the technologies described above, and compound thermal contraction casing tube of a kind of heat curing-type and preparation method thereof is provided.
Thermal contraction casing tube of the present invention comprises the reaction type hot-fusible glue-line of internal layer, and skin is that major ingredient is the polyolefinic shrink wrap layer of thermoplastics type.Said major ingredient for the component of thermoplastics type's polyolefin shrink wrap layer by volume proportioning be: polyethylene is 55～80 parts; Material modified is 15～30 parts; 5～15 parts of auxiliary agents, said polyethylene are low density polyethylene (LDPE) or medium density polyethylene.
Further improvement of the present invention is: said 15～30 parts of material modified components by volume allocation proportion are 5～10 parts of ethylene propylene diene rubbers; 10～20 parts of polyolefin elastomers; Wherein the index of polyolefin elastomer is: melt index is 1.5～5.0, and VA content is 14～28%.
Of the present invention further the improvement again is: said auxiliary agent is carbon black, fire retardant, sensitizer, lubricant and antioxidant, and said 5～15 parts of adjuvant components concrete proportioning by volume is that carbon black is 1～3 part; Fire retardant is 1～5 part in an aluminium hydroxide; Sensitizer is 1～2 part; Lubricant is 1～2 part; Antioxidant is 1～3 part.
Of the present invention further the improvement is: the component of said reaction type hot-fusible glue internal layer by volume proportioning is: 50～70 parts of polyolefin elastomers; 5～10 parts of flexibilizer, 22～30 parts of tackifying resins, 1～5 part in antioxidant; 1～3 part of polymerization inhibitor, 1～2 part of thermal initiator.
The manufacture method of the compound thermal contraction casing tube of above-mentioned heat curing-type may further comprise the steps: A. is composite bushing with the internal layer and the major ingredient of reaction type hot-fusible glue for the polyolefinic outer coextrusion mold of thermoplastics type; Layer thickness is 0.5～1.5mm in said, and extrusion temperature is 70～130 ℃; Outer layer thickness is 1～5mm, and extrusion temperature is 90～150 ℃; B. through high-energy electron accelerator this sleeve pipe is carried out irradiation; The parameter of said high-energy electron accelerator is 3.0Mev, 30mA; Irradiation dose is 4～12Mrad; Irradiation speed is 1～150m/min according to ectonexine thickness sum and product diameter adjusting range, and irradiation described in the step B is controlled to be that only cladding material is crosslinked; C. through heating internal diameter is expanded, adopted the heating and pressurizing expanded inner diameter, heating-up temperature is 120～150 ℃, and pressure is controlled to be 0.1Mpa～0.7Mpa, and the internal diameter expansion is controlled to be 2～5 times of original diameter.
Also have the manufacture method of the compound thermal contraction casing tube of a kind of heat curing-type may further comprise the steps: A '. through high-energy electron accelerator this inner layer material and cladding material are carried out irradiation, it is crosslinked that control is merely cladding material, and inner layer material is not crosslinked; B '. through heating internal diameter is expanded; C '. reaction type hot-fusible glue internal layer is coated in major ingredient on the outer field inwall of thermoplastics type's polyolefin, constitutes composite bushing.
Thermosetting composite type heat Heat-Shrinkable Tubings among the present invention not only can substitute insulation, sealing, protection against the tide, the antihunt action of common heat molten type double wall heat Heat-Shrinkable Tubings in-30～80 ℃ of scopes of application; And at high temperature (in 80～120 ℃ of scopes), high humidity (humidity is greater than 95%), acid (PH3～5) and alkali particular job environment such as (PH8～12); Can also cannot not reach softeningly, do not flow, adeciduate requirement; Coated object (motor, element and cable) surface, played the effect of insulated enclosure, moistureproof protection.Improved greatly by coating object (motor, element and cable wire harness), in medium-term and long-term reliability of operation of adverse circumstances such as high temperature, high humidity, soda acid and fail safe." heat curing-type PUR " in the thermosetting composite type heat Heat-Shrinkable Tubings and " thermoplastics type's thermal contraction proprietary material ", genus environment-friendly materials meet the regulation that the ROSH of European Union harmful substance and heavy metal are controlled.
Description of drawings
Fig. 1 is the compound thermal contraction casing tube cross-sectional schematic of heat curing-type of the present invention.
Embodiment
In conjunction with above-mentioned description of drawings specific embodiment of the present invention.
By knowing among Fig. 1; The compound thermal contraction casing tube of this heat curing-type comprises the reaction type hot-fusible glue-line 10 of internal layer; Skin is that major ingredient is the polyolefinic shrink wrap layer 20 of thermoplastics type, said major ingredient for the component of thermoplastics type's polyolefin shrink wrap layer 20 by volume proportioning be: low-density or medium density polyethylene are 55～80 parts; Material modified is 15～30 parts; 5～15 parts of auxiliary agents.
Wherein 15～30 parts of material modified components by volume allocation proportion be 5～10 parts of ethylene propylene diene rubbers, 10～20 parts of polyolefin elastomers, the index of polyolefin elastomer is: melt index is 1.5～5.0, VA content 14～28%.
Said auxiliary agent is carbon black, fire retardant, sensitizer, lubricant and antioxidant, and wherein the by volume concrete proportioning of the component of 5～15 parts of auxiliary agents is that carbon black is 1～3 part; Fire retardant is 1～5 part in an aluminium hydroxide; Sensitizer is 1～2 part; Lubricant is 1～2 part; Antioxidant is 1～3 part.
The component of said reaction type hot-fusible glue-line 10 by volume proportioning is: 50～70 parts of polyolefin elastomers, 5～10 parts of flexibilizer, 22～30 parts of tackifying resins, 1～5 part in antioxidant, 1～3 part of polymerization inhibitor, 1～2 part of thermal initiator.
The manufacture method of the compound thermal contraction casing tube of this heat curing-type may further comprise the steps: A. is composite bushing with the internal layer and the major ingredient of reaction type hot-fusible glue for the polyolefinic outer coextrusion mold of thermoplastics type; Layer thickness is 0.5～1.5mm in said, and extrusion temperature is 70～130 ℃; Outer layer thickness is 1～5mm, and extrusion temperature is 90～150 ℃; B. through high-energy electron accelerator this sleeve pipe is carried out irradiation; The parameter of said high-energy electron accelerator is 3.0Mev, 30mA; Irradiation dose is 4～12Mrad; Irradiation speed is 1～150m/min according to ectonexine thickness sum and product diameter adjusting range, and irradiation described in the step B is controlled to be that only cladding material is crosslinked; C. through heating internal diameter is expanded, internal diameter expansion scope is 2～5 times of original diameter.
Also have the manufacture method of the compound thermal contraction casing tube of a kind of heat curing-type may further comprise the steps: A '. through high-energy electron accelerator this inner layer material and cladding material are carried out irradiation, it is crosslinked that control is merely cladding material, and inner layer material is not crosslinked; B '. through heating internal diameter is expanded; C '. reaction type hot-fusible glue internal layer is coated in major ingredient on the outer field inwall of thermoplastics type's polyolefin, constitutes composite bushing.
The present invention is by internal layer hot melt curing reaction type PUR and two kinds of special materials of outer thermal contraction proprietary material; Be shaped to the semi-finished product of thermosetting composite double layer thermal contraction casing tube in the two extruders coextru-lamination; This semi-finished product are under 90～130 ℃ of conditions in the temperature of co-extrusion, and are not crosslinked and do not solidify in its internal layer reaction type hot-fusible glue and the outer wall composite molding process; Use the high-energy electron accelerator of 2.5～5.0Mev; Irradiation dose is controlled under the radiation parameter of 4～12Mrad scope, does not take place at internal layer thermosetting reaction type hot-fusible glue under the prerequisite of crosslinked and curing, the control cladding material produces crosslinked.Semi-finished product behind irradiation in airtight expansion device, be heated to 120～150 ℃, the pipe in be forced in the production process of the compound thermal contraction casing tube finished product of thermosetting that is expanded to 2～5 times under 0.1Mpa～0.7Mpa pressure; Control reaction type hot-fusible glue is not crosslinked and do not solidify; The compound thermal contraction casing tube finished product of thermosetting after this expansion is in the application of heat process; When its heating-up temperature its reaction type hot-fusible glue of (can setting crosslinking curing temperature/time according to client's actual demand) during greater than 200 ℃ takes place crosslinkedly, get final product solidifying and setting after the cooling.
The compound thermal contraction casing tube of heat curing-type of the present invention has solved in practical application by the coating object and has caused seal failure with the ambient temperature rising, and insulation descends, vibration comes off safe mass problems such as reliability reduction.
Above content is to combine concrete preferred implementation to the further explain that the present invention did, and can not assert that practical implementation of the present invention is confined to these explanations.For the those of ordinary skill of technical field under the present invention, under the prerequisite that does not break away from the present invention's design, can also make some simple deduction or replace, all should be regarded as belonging to protection scope of the present invention.
Claims (10)
1. compound thermal contraction casing tube of heat curing-type, it is characterized in that: this thermal contraction casing tube comprises the reaction type hot-fusible glue-line (10) of internal layer, skin is that major ingredient is the polyolefinic shrink wrap layer of thermoplastics type (20).
2. according to the compound thermal contraction casing tube of the said heat curing-type of claim 1, it is characterized in that: said major ingredient for the component of thermoplastics type's polyolefin shrink wrap layer (20) by volume proportioning be: low-density or medium density polyethylene are 55～80 parts; Material modified is 15～30 parts; 5～15 parts of auxiliary agents.
3. according to the compound thermal contraction casing tube of the said heat curing-type of claim 2, it is characterized in that: said 15～30 parts of material modified components by volume allocation proportion are 5～10 parts of ethylene propylene diene rubbers, 10～20 parts of polyolefin elastomers.
4. according to the compound thermal contraction casing tube of the said heat curing-type of claim 3, it is characterized in that: the index of said polyolefin elastomer is: melt index is 1.5～5.0, VA content 14～28%.
5. according to the compound thermal contraction casing tube of each described heat curing-type in the claim 2 to 4, it is characterized in that: said auxiliary agent is carbon black, fire retardant, sensitizer, lubricant and antioxidant.
6. the compound thermal contraction casing tube of heat curing-type according to claim 5 is characterized in that: the composition of said 5～15 parts of auxiliary agents concrete proportioning by volume is that carbon black is 1～3 part; Fire retardant is 1～5 part in an aluminium hydroxide; Sensitizer is 1～2 part; Lubricant is 1～2 part; Antioxidant is 1～3 part.
7. according to the compound thermal contraction casing tube of each described heat curing-type in the claim 2 to 4; It is characterized in that: the component of said reaction type hot-fusible glue-line (10) by volume proportioning is: 50～70 parts of polyolefin elastomers; 5～10 parts of flexibilizer, 22～30 parts of tackifying resins, 1～5 part in antioxidant; 1～3 part of polymerization inhibitor, 1～2 part of thermal initiator.
8. the manufacture method of the compound thermal contraction casing tube of each said heat curing-type in the claim 1 to 7, it is characterized in that: this method may further comprise the steps: A. is composite bushing with the internal layer and the major ingredient of reaction type hot-fusible glue for the polyolefinic coextrusion mold of thermoplastics type; B. through high-energy electron accelerator this sleeve pipe is carried out irradiation, it is crosslinked that control is merely cladding material, and inner layer material is not crosslinked; C. through heating internal diameter is expanded.
9. the manufacture method of the compound thermal contraction casing tube of each said heat curing-type in the claim 1 to 7; It is characterized in that: this method may further comprise the steps: A '. through high-energy electron accelerator this inner layer material and cladding material are carried out irradiation; It is crosslinked that control is merely cladding material, and inner layer material is not crosslinked; B '. through heating internal diameter is expanded; C '. reaction type hot-fusible glue internal layer is coated in major ingredient on the outer field inwall of thermoplastics type's polyolefin, constitutes composite bushing.
10. according to Claim 8 or 9 described manufacture methods, it is characterized in that: layer thickness is 0.5～1.5mm in described in the steps A, and extrusion temperature is 70～130 ℃; Outer layer thickness is 1～5mm, and extrusion temperature is 90～150 ℃; The parameter of high-energy electron accelerator described in the step B is 3.0Mev, 30mA, and irradiation dose is 4～12Mrad, and irradiation speed is 1～150m/min according to ectonexine thickness sum and product diameter adjusting range; Adopt the heating and pressurizing expanded inner diameter among the step C, heating-up temperature is 120～150 ℃, and pressure is controlled to be 0.1Mpa～0.7Mpa, and the internal diameter expansion is controlled to be 2～5 times of original diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201210239715.3A CN102709007B (en) | 2012-07-12 | 2012-07-12 | Thermal setted coextruded heat shrinkable sleeving and method for producing same |
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| CN201210239715.3A CN102709007B (en) | 2012-07-12 | 2012-07-12 | Thermal setted coextruded heat shrinkable sleeving and method for producing same |
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| CN102709007B CN102709007B (en) | 2014-07-02 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104262751A (en) * | 2014-10-13 | 2015-01-07 | 扬州大学 | Special material for permanent antistatic flexible PE (polyethylene) pipes |
| CN106932859A (en) * | 2017-04-17 | 2017-07-07 | 南京邮电大学 | A kind of method for improving Optical Fiber Transmission power threshold |
| CN110447154A (en) * | 2016-12-09 | 2019-11-12 | 李尔公司 | Protection sleeve pipe is heat-shrinked to the method on electrical connection section |
| CN110785895A (en) * | 2017-06-23 | 2020-02-11 | 住友电气工业株式会社 | Terminal-equipped electric wire and method for manufacturing same |
| CN111393733A (en) * | 2020-04-03 | 2020-07-10 | 江苏鼎尚电子材料股份有限公司 | Environment-friendly flame-retardant heat-shrinkable tubing and preparation method thereof |
| CN111564706A (en) * | 2019-02-14 | 2020-08-21 | 住友电装株式会社 | Ground terminal and wire harness |
| CN113366706A (en) * | 2019-02-14 | 2021-09-07 | 住友电装株式会社 | Ground terminal and wire harness |
| CN114156025A (en) * | 2021-11-13 | 2022-03-08 | 广西电网有限责任公司南宁供电局 | Insulating sleeve |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104262751A (en) * | 2014-10-13 | 2015-01-07 | 扬州大学 | Special material for permanent antistatic flexible PE (polyethylene) pipes |
| CN104262751B (en) * | 2014-10-13 | 2016-08-24 | 扬州大学 | The flexible Polyethylene Pipe Resin of permanence antistatic |
| CN110447154A (en) * | 2016-12-09 | 2019-11-12 | 李尔公司 | Protection sleeve pipe is heat-shrinked to the method on electrical connection section |
| CN106932859A (en) * | 2017-04-17 | 2017-07-07 | 南京邮电大学 | A kind of method for improving Optical Fiber Transmission power threshold |
| CN110785895A (en) * | 2017-06-23 | 2020-02-11 | 住友电气工业株式会社 | Terminal-equipped electric wire and method for manufacturing same |
| CN111564706A (en) * | 2019-02-14 | 2020-08-21 | 住友电装株式会社 | Ground terminal and wire harness |
| CN113366706A (en) * | 2019-02-14 | 2021-09-07 | 住友电装株式会社 | Ground terminal and wire harness |
| CN111564706B (en) * | 2019-02-14 | 2021-09-17 | 住友电装株式会社 | Ground terminal and wire harness |
| CN111393733A (en) * | 2020-04-03 | 2020-07-10 | 江苏鼎尚电子材料股份有限公司 | Environment-friendly flame-retardant heat-shrinkable tubing and preparation method thereof |
| CN114156025A (en) * | 2021-11-13 | 2022-03-08 | 广西电网有限责任公司南宁供电局 | Insulating sleeve |
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| CN102709007B (en) | 2014-07-02 |
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Address after: 518000 Guangdong city of Shenzhen province Pingshan New District Office Kengzi sands community Joint Industrial Zone No. 1 building Patentee after: Shenzhen Bonseal New Material Co., Ltd. Address before: 518000, Shenzhen, Guangdong province Baoan District Mission Street Si Si Road south section of hung United Eagle Technology Park Patentee before: Shenzhen Bonseal New Material Co., Ltd. |