CN103396599A - Polymer-base PTC (Positive Temperature Coefficient) composite material for self temperature limiting heat tape - Google Patents
Polymer-base PTC (Positive Temperature Coefficient) composite material for self temperature limiting heat tape Download PDFInfo
- Publication number
- CN103396599A CN103396599A CN2013103718777A CN201310371877A CN103396599A CN 103396599 A CN103396599 A CN 103396599A CN 2013103718777 A CN2013103718777 A CN 2013103718777A CN 201310371877 A CN201310371877 A CN 201310371877A CN 103396599 A CN103396599 A CN 103396599A
- Authority
- CN
- China
- Prior art keywords
- vinyl acetate
- mass percent
- density polyethylene
- ethylene
- composite material
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Compositions Of Macromolecular Compounds (AREA)
- Organic Insulating Materials (AREA)
- Insulated Conductors (AREA)
Abstract
The invention relates to a polymer-base PTC (Positive Temperature Coefficient) composite material for a self temperature limiting heat tape. The polymer-base PTC composite material is characterized by comprising the following raw materials in percentage by mass: 55%-65% of low-density polyethylene, 20%-25% of ethylene-vinyl acetate copolymers, 10%-15% of carbon black, 2%-5% of barium titanate, 5%-10% of neopentyl glycol, 5%-10% of trimethylolethane, 5%-10% of pentaerythritol, 5%-10% of trihydroxymethyl aminomethane and 2%-3% of benzophenone, wherein the trade mark of the low-density polyethylene is 18D, the melt index of the low-density polyethylene is 2.0 g/minute; vinyl acetate accounts for 14%-51% by mass of the ethylene-vinyl acetate copolymers. The polymer-base PTC composite material disclosed by the invention has the beneficial effects that the environmental heat can be temporarily adsorbed by adding phase-change heat storage materials, namely the neopentyl glycol, the pentaerythritol, trihydroxymethyl aminomethane and the like to the traditional formula as NTC (Negative Temperature Coefficient) effect inhibitors, the generation of an NTC effect is postponed, the local overheating caused by the internal defects and impurities or external factors of the materials is avoided, a system is prevented from being accelerated in aging due to thermal breakdown, the high-temperature stability of the materials is improved, and the service life of the materials is prolonged. The polymer-base PTC composite material can be used for finely regulating and controlling the heating power of the materials and enhancing the stability of the composite material by adopting barium titanate inorganic particles.
Description
Technical field:
The present invention relates to the accompanying-heat cable technical field, refer in particular to a kind of self-limiting heating cable polymer matrix PTC matrix material and preparation method thereof.
Background technology:
Polymer matrix PTC material is to use polymkeric substance as matrix, the matrix material with PTC effect that the conducting particless such as carbon black, graphite, carbon fiber, metal are prepared from by blend as filler.Have cheap, machine-shaping easily, electric property and mechanical property advantages of higher, be widely used in fields such as companion heat, insulation, current limliting, sensings, especially polyvinyl PTC temp auto-controlled cable all is on the actual application in the field of thermal insulation of the domatic and culvert of building, airport, road and bridge, oil pipeline etc.
Polyvinyl PTC temp auto-controlled cable exists the NTC effect obvious, and NTC is the important factor that affects ptc material repeatability and work-ing life.The problems such as ptc material ubiquity repeatability is poor at present, and work-ing life is short have seriously hindered its application.
Summary of the invention:
The objective of the invention is to have NTC effect defect for present polyvinyl PTC temp auto-controlled cable, provide a kind of and can effectively suppress the NTC effect, have good repeatability, long service life, the PTC matrix material that has good stability; Another object of the present invention is to provide the preparation method of this kind PTC matrix material.
The objective of the invention is to realize as follows: a kind of self-limiting heating cable polymer matrix PTC matrix material, it is comprised of the raw material of following mass percent, Low Density Polyethylene 55-65%, ethylene-vinyl acetate copolymer 20-25%, carbon black 10-15%, barium titanate 2-5%, neopentyl glycol 5-10%, trimethylolethane 5-10%, tetramethylolmethane 5-10%, Tutofusin tris 5-10%, benzophenone 2-3%; Wherein, the Low Density Polyethylene trade mark is 18D, and melting index is 2.0g/min; In ethylene-vinyl acetate copolymer, the vinyl acetate mass percent is 14% and 51%.
The self-limiting heating cable preparation method of polymer matrix PTC matrix material comprises the following steps:
Step 1, take following raw material and form:
Low Density Polyethylene mass percent 55-65%, ethylene-vinyl acetate copolymer mass percent 20-25%, carbon black mass percentage ratio 10-15%, barium titanate mass percent 2-5%, neopentyl glycol mass percent 5-10%, trimethylolethane mass percent 5-10%, tetramethylolmethane mass percent 5-10%, Tutofusin tris mass percent 5-10%, benzophenone mass percent 1-3%;
Step 2, Low Density Polyethylene, ethylene-vinyl acetate copolymer that step 1 is taken are divided in mass ratio 6:4 and are divided into two parts, and portion is added torque rheometer, and banburying is 3 minutes under the condition of 140 ℃ of rheometer temperature, rotating speed 40r/min, makes its melting;
Step 3, add the organic phase change materials such as carbon black, barium titanate, benzophenone, neopentyl glycol in the melt of step 2 gained after, add again another part Low Density Polyethylene in step 2, the first mixed thing of ethylene-vinyl acetate copolymer, under the condition of 140 ℃ of rheometer temperature, rotating speed 40r/min, banburying discharging in 10 minutes;
Step 4, making heating tape, be coated on step 3 gained pellet on two copper conductors parallel to each other by screw extrusion press, then adopts
60After the Co gamma-rays carries out cross-linking radiation, to it, coat polyethylene layer, then carry out the constant temperature normalized; 80 degrees centigrade for the treatment of temps, 2 hours treatment times.
The invention has the beneficial effects as follows: add the phase-change heat-storage materials such as neopentyl glycol, tetramethylolmethane, Tutofusin tris as the temporary transient absorbing environmental heat of NTC effect inhibitor energy in conventional formulation, delay the generation of NTC effect, prevent the local superheating that material internal defect and impurity or externalities cause, avoid system " thermal runaway " and accelerated deterioration, high-temperature stability and the work-ing life of having improved material; Adopting Low Density Polyethylene and ethylene-vinyl acetate copolymer is that body material has remarkable effect to the PTC strength and stability that improves material; If single employing polyethylene matrix, because it is non-polar polymer, lower as the polar particle carbon black of filler and the barium titanate content that distributes therein, make the room temperature resistance of material higher, thereby its PTC intensity is lower; Be body material and adopt Low Density Polyethylene and ethylene-vinyl acetate copolymer, because ethylene-vinyl acetate copolymer is polar copolymer, it embodies good pardon to polarity filler carbon black, barium titanate particles, thereby make carbon black and barium titanate distribution content in matrix increase, the corresponding reduction of the room temperature resistance of material, thereby the increase of the PTC intensity of material, stability strengthens; Ethylene-vinyl acetate copolymer has very good resistance to deterioration and ozone resistance in addition, thereby has improved the work-ing life of matrix material; Adopt the barium titanate inorganic particulate not only can finely tune the heating power of control material, do not affect the electroconductibility of compound system, and in temperature-rise period due to the obstruction of barium titanate particles with and electropositive sucking action, suppress the nodulizing of conducting particles, thereby improved the stability of matrix material; Adopt the Multistep feeding method, filler is joined in the body material of melting, make filler grain disperse fully; Avoided in disposable feeding in raw material because blapharoplast is heated inhomogeneous, the particle that first melts is wrapped in carbon black and barium titanate wherein, affected the motion of filler grain, and then the blapharoplast that is in succession melted continues parcel and a large amount of agglomerations of generation filler grain.
Embodiment:
Self-limiting heating cable of the present invention forms with the raw material of polymer matrix PTC matrix material by following mass percent: Low Density Polyethylene 55-65%, ethylene-vinyl acetate copolymer 20-25%, carbon black 10-15%, barium titanate 2-5%, neopentyl glycol 5-10%, trimethylolethane 5-10%, Tutofusin tris 5-10%, benzophenone 2-3%.
Wherein, the Low Density Polyethylene trade mark is 18D, and melting index is 2.0g/min; In ethylene-vinyl acetate copolymer, the vinyl acetate mass percent is 14% and 51%.
The self-limiting heating cable of the present invention preparation method of polymer matrix PTC matrix material comprises the following steps:
Step 1, take raw material by mass percent and form:
Low Density Polyethylene 55-65%, ethylene-vinyl acetate copolymer 20-25%, carbon black 10-15%, barium titanate 2-5%, neopentyl glycol 5-10%, trimethylolethane 5-10%, tetramethylolmethane 5-10%, Tutofusin tris 5-10%, benzophenone 2-3%;
Step 2, Low Density Polyethylene, ethylene-vinyl acetate copolymer that step 1 is taken are divided in mass ratio 6:4 and are divided into two parts, the portion that is 6 with mass ratio adds torque rheometer, 140 ℃ of rheometer temperature, under the condition of rotating speed 40r/min, banburying is 3 minutes, makes its melting;
Step 3, add the organic phase change materials such as carbon black, barium titanate, benzophenone, neopentyl glycol in the melt of step 2 gained after, adding weight ratio in step 2 is 4 Low Density Polyethylene, ethylene-vinyl acetate copolymer again, 140 ℃ of rheometer temperature, banburying discharging in 10 minutes under the condition of rotating speed 40r/min.
Step 4, making heating tape.Step 3 gained pellet is coated on two copper conductors parallel to each other by screw extrusion press, then adopts
60After the Co gamma-rays carries out cross-linking radiation, to it, coat polyethylene layer, then carry out the constant temperature normalized.Treatment temp: 80 degrees centigrade, 2 hours treatment times.
Further illustrate the present invention below in conjunction with example.
Example 1
Step 1, take raw material and form:
30.0g Low Density Polyethylene, 7.5g vinyl acetate content are 14% ethylene-vinyl acetate copolymer, 3.0g neopentyl glycol, 7.0g carbon black, 1.25g barium titanate, 1.25g benzophenone;
Step 2, will be divided into two parts of A, B after 30g Low Density Polyethylene and the preliminary blend of 7.5g ethylene-vinyl acetate copolymer, A part 22.5g, B part 15.0g.The preliminary blend of A part is added torque rheometer, and 140 ℃ of rheometer temperature, under the condition of rotating speed 40r/min, banburying is 3 minutes, makes its melting.
Step 3, add step 3.0g neopentyl glycol, 7.0g carbon black, 1.25g barium titanate, 1.25g benzophenone in the melt of step 2 gained after, add again 15.0g Low Density Polyethylene, ethylene-vinyl acetate copolymer, 140 ℃ of rheometer temperature, banburying discharging in 10 minutes under the condition of rotating speed 40r/min.
Step 4, making heating tape.Step 3 gained pellet is coated on two copper conductors parallel to each other by screw extrusion press, then adopts
60After the Co gamma-rays carries out cross-linking radiation, to it, coat polyethylene layer, then carry out the constant temperature normalized.80 degrees centigrade for the treatment of temps, 2 hours treatment times.
Example 2,
Adopt vinyl acetate content be 51% ethylene-vinyl acetate copolymer to replace vinyl acetate content in example 1 be 14% ethylene-vinyl acetate copolymer, all the other step conditions such as example 1.
Example 3,
Adopt the neopentyl glycol in trimethylolethane replacement example 1, all the other step conditions such as example 1.
Example 4, employing Tutofusin tris replace the neopentyl glycol in example 1, all the other step conditions such as example 1.
Claims (2)
1. self-limiting heating cable polymer matrix PTC matrix material, it is characterized in that: it is comprised of the raw material of following mass percent, Low Density Polyethylene 55-65%, ethylene-vinyl acetate copolymer 20-25%, carbon black 10-15%, barium titanate 2-5%, neopentyl glycol 5-10%, trimethylolethane 5-10%, tetramethylolmethane 5-10%, Tutofusin tris 5-10%, benzophenone 2-3%; Wherein, the Low Density Polyethylene trade mark is 18D, and melting index is 2.0g/min; In ethylene-vinyl acetate copolymer, the vinyl acetate mass percent is 14% and 51%.
2. self-limiting heating cable, with the preparation method of polymer matrix PTC matrix material, is characterized in that, comprises the following steps:
Step 1, take following raw material and form:
Low Density Polyethylene mass percent 55-65%, ethylene-vinyl acetate copolymer mass percent 20-25%, carbon black mass percentage ratio 10-15%, barium titanate mass percent 2-5%, neopentyl glycol mass percent 5-10%, trimethylolethane mass percent 5-10%, tetramethylolmethane mass percent 5-10%, Tutofusin tris mass percent 5-10%, benzophenone mass percent 1-3%;
Step 2, Low Density Polyethylene, ethylene-vinyl acetate copolymer that step 1 is taken are divided in mass ratio 6:4 and are divided into two parts, and portion is added torque rheometer, and banburying is 3 minutes under the condition of 140 ℃ of rheometer temperature, rotating speed 40r/min, makes its melting;
Step 3, add the organic phase change materials such as carbon black, barium titanate, benzophenone, neopentyl glycol in the melt of step 2 gained after, add again another part Low Density Polyethylene in step 2, the first mixed thing of ethylene-vinyl acetate copolymer, under the condition of 140 ℃ of rheometer temperature, rotating speed 40r/min, banburying discharging in 10 minutes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310371877.7A CN103396599B (en) | 2013-08-23 | 2013-08-23 | Self-limiting heating cable polymer matrix PTC matrix material and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310371877.7A CN103396599B (en) | 2013-08-23 | 2013-08-23 | Self-limiting heating cable polymer matrix PTC matrix material and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103396599A true CN103396599A (en) | 2013-11-20 |
| CN103396599B CN103396599B (en) | 2015-11-04 |
Family
ID=49560345
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310371877.7A Active CN103396599B (en) | 2013-08-23 | 2013-08-23 | Self-limiting heating cable polymer matrix PTC matrix material and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103396599B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103745772A (en) * | 2013-12-29 | 2014-04-23 | 湖南华菱线缆股份有限公司 | Phase change self-regulating temperature shielded cable |
| CN104036866A (en) * | 2014-06-27 | 2014-09-10 | 国家电网公司 | Phase-change temperature-control type high-voltage cable |
| CN104403177A (en) * | 2014-12-17 | 2015-03-11 | 大连联合高分子材料有限公司 | Wear-resistant heat-shrinkable sleeve for aluminum pipeline of automobile air conditioner as well as preparation method and application of wear-resistant heat-shrinkable sleeve |
| CN104961966A (en) * | 2015-07-17 | 2015-10-07 | 广东环威电线电缆股份有限公司 | Heating cable, semiconductive high-polymer material and preparation method of semiconductive high-polymer material |
| CN105061848A (en) * | 2015-06-11 | 2015-11-18 | 上海大学 | 36V self-limiting temperature increase-associated electric heating electric cable core belt material and preparation method thereof |
| CN109836823A (en) * | 2019-02-25 | 2019-06-04 | 清华大学 | A kind of regulation method of insulation material material temperature resistance characteristic |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1546425A (en) * | 2003-12-02 | 2004-11-17 | 天津大学 | Graphite, phenolic resin, (Ba1-x-y, Srx, Pby) TiO3 based PTC thermistor and method for preparing the same |
| CN102408606A (en) * | 2011-09-02 | 2012-04-11 | 西安盖沃热能科技有限公司 | Flame-retardant PTC (positive temperature coefficient) polymer electroconductive material and preparation method thereof |
-
2013
- 2013-08-23 CN CN201310371877.7A patent/CN103396599B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1546425A (en) * | 2003-12-02 | 2004-11-17 | 天津大学 | Graphite, phenolic resin, (Ba1-x-y, Srx, Pby) TiO3 based PTC thermistor and method for preparing the same |
| CN102408606A (en) * | 2011-09-02 | 2012-04-11 | 西安盖沃热能科技有限公司 | Flame-retardant PTC (positive temperature coefficient) polymer electroconductive material and preparation method thereof |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103745772A (en) * | 2013-12-29 | 2014-04-23 | 湖南华菱线缆股份有限公司 | Phase change self-regulating temperature shielded cable |
| CN103745772B (en) * | 2013-12-29 | 2016-05-18 | 湖南华菱线缆股份有限公司 | Phase transformation temp auto-controlled shielded cable |
| CN104036866A (en) * | 2014-06-27 | 2014-09-10 | 国家电网公司 | Phase-change temperature-control type high-voltage cable |
| CN104403177A (en) * | 2014-12-17 | 2015-03-11 | 大连联合高分子材料有限公司 | Wear-resistant heat-shrinkable sleeve for aluminum pipeline of automobile air conditioner as well as preparation method and application of wear-resistant heat-shrinkable sleeve |
| CN105061848A (en) * | 2015-06-11 | 2015-11-18 | 上海大学 | 36V self-limiting temperature increase-associated electric heating electric cable core belt material and preparation method thereof |
| CN104961966A (en) * | 2015-07-17 | 2015-10-07 | 广东环威电线电缆股份有限公司 | Heating cable, semiconductive high-polymer material and preparation method of semiconductive high-polymer material |
| CN104961966B (en) * | 2015-07-17 | 2018-06-08 | 广东环威电线电缆股份有限公司 | Heat the preparation method of cable, semi-conductive high polymer material and semi-conductive high polymer material |
| CN109836823A (en) * | 2019-02-25 | 2019-06-04 | 清华大学 | A kind of regulation method of insulation material material temperature resistance characteristic |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103396599B (en) | 2015-11-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103396599A (en) | Polymer-base PTC (Positive Temperature Coefficient) composite material for self temperature limiting heat tape | |
| CA2177450C (en) | Thermoplastic, moldable, non-exuding phase change materials | |
| US3858144A (en) | Voltage stress-resistant conductive articles | |
| CN101817950B (en) | Screen material for 35kV grade high/medium voltage crosslinked cable conductor layer and preparation method thereof | |
| CN103194161B (en) | Positive temperature coefficient (PTC) material used for heat safety protection of lithium ion battery, and application thereof | |
| CN101851366B (en) | Strippable shielding material for 35KV-level middle-high voltage cross-linked cable insulating layer as well as preparation method and application thereof | |
| JPS643322B2 (en) | ||
| JP5697037B2 (en) | DC power cable and method for manufacturing DC power line | |
| CN102952311B (en) | Preparation method of low-smoke non-halogen flame-retardant material for high-voltage cable sheath | |
| TWI512024B (en) | Composition having non-linear current-voltage characteristics | |
| CN103589160A (en) | Grafted blended cable insulating material and preparation method thereof | |
| CN105272207A (en) | Preparation method for ZnO pressure-sensitive ceramic microspheres | |
| CN102167858A (en) | Positive temperature coefficient material, preparation method thereof and thermistor containing material | |
| JP6286886B2 (en) | DC cable | |
| CN103172926A (en) | Low-temperature-shrinkage halogen-free flame-retardant heat-shrinkable casing and processing technique thereof | |
| CN107573574B (en) | Direct current cable shielding material of +/-525 kV and below and preparation method thereof | |
| CN102140194A (en) | Material with positive temperature coefficient, preparation method thereof and thermosensitive resistor having same | |
| CN101701080A (en) | Radiation crosslinking heat-shrinkable semiconductor tube material | |
| CN105968872B (en) | Halogen-free flame-retardant thermoplastic elastomer new-energy automobile cable material | |
| CN104292592A (en) | Material for self-regulating heating/heat tracing cables and preparation method thereof | |
| CN106750848A (en) | A kind of easily peelable semiconductive shieldin material and preparation method thereof | |
| CN106046510A (en) | Graphene-based flexible high molecular PTC material and preparation method thereof | |
| CN113571240B (en) | Ethylene propylene rubber insulating cold-resistant flame-retardant 1-level direct-current flexible cable and manufacturing method thereof | |
| CN102604281A (en) | Preparation method of crosslinking-free polymer-based high-temperature PTC (positive temperature coefficient) material | |
| CN108395610A (en) | A kind of carbon nanotube shield semiconductors material and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |