CN101193467B - Making method for plane macromolecule compound material heating sheet and its heating base material - Google Patents
Making method for plane macromolecule compound material heating sheet and its heating base material Download PDFInfo
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- CN101193467B CN101193467B CN2006101458987A CN200610145898A CN101193467B CN 101193467 B CN101193467 B CN 101193467B CN 2006101458987 A CN2006101458987 A CN 2006101458987A CN 200610145898 A CN200610145898 A CN 200610145898A CN 101193467 B CN101193467 B CN 101193467B
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Abstract
The invention provides a preparation method for a plane polymer composite material heating plate and a heating substrate thereof. The plane polymer composite material heating plate includes the heating substrate, electrodes, auxiliary electrodes and an insulating protective layer, wherein both sides of the heating substrate are respectively equipped with a positive and a negative electrode that are in parallel with each other, and the auxiliary electrodes are used for covering the heating substrate interval that is covered by the parallel positive and negative electrodes. The insulating protective layer is clad onto the outer layer of the heating substrate provided with the electrodes and the auxiliary electrodes. Wherein the heating substrate is composed of the following materials with acertain weight proportion: linear low-density polyethylene: 35 - 40 phr; metallocene polyethylene: 25 - 35 phr; conductive carbon black: 25 - 35 phr; antioxidant: 1 - 2 phr and composite nano-pole titanium dioxide:1 - 2 phr. And the heating substrate is smashed after mixing in a mixing roll and then is granulated by a single-screw extruder so that mixed master batches are made. After being mix-melted, dispersed and plasticized in a twin-screw extruder, the mixed master batches enter into a single-screw extruder and are extruded through the sheet forming mould, then the extruded mixed master batches are pressed by a three-roller plating press, into sheets that are finally cross-linked through electron beam irradiation of an electron accelerator.
Description
Technical field
The present invention relates to the preparation method of a kind of plane macromolecule compound material heating sheet and heating base material thereof, belong to have the positive temperature coefficient feature from the temperature control heater as the heating material.
Background technology
Domestic in recent years employing have the positive temperature coefficient feature from the temperature control heater as the heating material, very universal, its principal mode is based on heating cable one class on-plane surface heater.Adopting the heating material of plane heater is heating base material with electrically conductive ink and carbon fiber mainly, but does not have the positive temperature coefficient feature.Have the why rare of positive temperature coefficient feature from temperature control plane heater, its main cause is, planar polymer composites, its conductive path is to be made of the carbochain that strand twines, when applying voltage V between to two electrodes, the interval that electric current passes through between two electrodes is under one group of series circuit, electric current is when having the plane composite material of positive temperature coefficient of resistivity feature, rising simultaneously with temperature, resistance increases, electric current reduces, but form its resistivity difference of various circuit by carbochain, resistance is big in series circuit position voltage is distributed high, and under the identical condition of electric current, the position thermal output that resistance is big is just big, it is just fast to heat up, because the resistivity of the polymer composites of positive temperature coefficient feature has high dependency to temperature, the fast more position of heating up, it is high more that voltage superposes, when local thermal output is assembled temperature near the matrix melting temperature, just form thermal runaway.
Existing solution is mostly improved the thermal shock resistivity from composite material itself, and a kind of is to add corresponding adjuvants composite material is carried out modification in raw material, improves the material thermal shock resistance.Another kind is the gel fraction that improves the composite material degree of cross linking, with the stability that improves material, the thermal shock strength of releiving.
The weak point of prior art scheme is: the modification and the degree of cross linking to material matrix improve, the thermal shock resistance of reinforcing material, but can not avoid and control the inhomogeneities that increases because of local electrical resistance, cause the concentrated impact of voltage, cause thermal output to be assembled and form thermal runaway.
Summary of the invention
The object of the present invention is to provide the preparation method of a kind of plane macromolecule compound material heating sheet and heating base material thereof, can prevent local overheating, avoid being subjected to the plane heating sheet of thermal shock.
Plane macromolecule compound material heating sheet of the present invention; comprise heating base material, electrode, auxiliary electrode and protection insulating barrier; wherein heating base material adopts the material that is the positive temperature coefficient feature to make the sheet rectangle; the positive and negative electrode that is parallel to each other is set respectively in its both sides; and this positive and negative electrode connects power supply by electric wire; cover two or more auxiliary electrode again in the heating base material interval that has covered parallel positive and negative electrode, these auxiliary electrodes are parallel to the zone between positive and negative electrode and five equilibrium positive and negative electrode.Be provided with N bar auxiliary electrode, and when applying voltage V between positive and negative electrode, the interregional voltage of five equilibrium equals or near V/N.Described protection insulating barrier is coated on the skin of the heating base material with electrode and auxiliary electrode.
When applying voltage between the positive and negative electrode of plane macromolecule compound material heating sheet of the present invention, have electric current to pass through heating base material, resistance increases simultaneously, and this feature will meet positive temperature coefficient of resistivity running parameter scope.
Electric loop between positive and negative electrode should be considered as whole series circuit, by a plurality of interval series circuit that forms in a plurality of series circuits of five equilibrium, the low-voltage that total voltage is divided into some equalizations is the deboost impact strength fully, also limited simultaneously the voltage transfer velocity, the span in the zone that has dwindled, dwindle the scope of heat radiation inhomogeneities, soaking condition is between base material softening point and the fusion point, avoid piling up the fusion point that temperature rises up into base material.Rectangle heating sheet by above-mentioned measure, when the energising heating heating plane multiple spot after tested its temperature difference be no more than 10%.
Described protection insulating barrier can adopt poly-to benzene dipotassium ethyl glycol fat/polyethylene laminated film, and the polyethylene face of laminated film is fitted with the heating base material with electrode and auxiliary electrode, and is compound in 100-110 ℃ of roll extrusion through two roller high temperature compounding machines.Plane macromolecule compound material heating sheet through parcel protection insulating barrier has electrical insulation capability.
Described protection insulating barrier has a plane with aluminium foil/poly-to benzene dipotassium ethyl glycol fat/polyethylene laminated film; the polyethylene face of laminated film is fitted with the heating base material surface with electrode and auxiliary electrode, and is compound in 100-110 ℃ of roll extrusion through two roller high temperature compounding machines.Plane macromolecule compound material heating sheet through parcel protection insulating barrier has electrical insulation capability.Simultaneously, the outer aluminium foil of fitting of protection insulating barrier can be when the heating sheet be subjected to the point-like thermal shock timely scatter-gather heat together.Cooperate auxiliary electrode to disperse the point-like thermal-arrest, and auxiliary electrode disperse local thermal-arrest, more than constitutes the balanced heat abstractor of heating sheet.Can overcome in the positive temperature coefficient of resistivity feature thermal shock disadvantage because of the inconsistent generation of change in resistance.
The preparation method of heating base material of the present invention is as follows:
1, heating base material is made by following raw materials in part by weight:
Low-density is directly locked polyethylene 35-40 part
Metallocene PE 25-35 part
Conductive carbon black 25-35 part
Antioxidant 1-2 part
Composite nano utmost point titanium oxide 1-2 part
2, adopt the raw material of aforementioned proportion configuration, pulverize,, make masterbatch mix through the single screw extrusion machine extruding pelletization by the mixing back of double roll mill.
3, above-mentioned masterbatch mix is again through double screw extruder consolute, dispersion, plasticizing under 160-180 ℃ of state.
4, directly enter single screw extrusion machine, extrude through the sheet forming mould under 150-170 ℃ of state, the die orifice extrusion temperature is guaranteed between 155-163 ℃.
5, the sheet material of extruding is fixed to sheet material through three-roller calendar.
6, the sheet material after the above-mentioned typing, through the electron accelerator crosslinking electron beam irradiation, gel fraction is scope between 68%-75%.It is 68% crosslinked insufficient that gel fraction is lower than, and the restorability of positive temperature coefficient feature is poor, has the depleted sign life-span low under prolonged and repeated variation operation.Gel fraction be higher than 75% crosslinked excessively, positive temperature coefficient changing features amplitude is low, does not reach the change in resistance parameter request of low temperature heating.
Said process is under the state of saboteur's original structure not, the moulding of composite material extrusion mould-outlet simultaneously, after several macromolecules can both obtain sufficient crystalline texture, its positive temperature coefficient of resistivity running parameter was: when 0 ℃ of room temperature moment by electric current at 2.3-3A/M
2, power output 90-110W/M when 30 ℃ of room temperatures
2, power output 50-60W/M when 70 ℃ of room temperatures
2, power output 0.6-1W/M when 120 ℃ of room temperatures
2Above-mentioned parameter can reach the specification requirement of low temperature heating.
The advantage of plane macromolecule compound material heating sheet of the present invention and preparation method thereof is: 1, adopt the design of conductive region split plot design and the combination of metal film on surface cooling method, solved the high temperature thermal shocking that positive temperature coefficient feature heater causes because of local overheating, form the integral planar heating not exclusively, finally lose the disadvantage of plane heating function.It is too concentrated to avoid heater the output of localized heat power to occur, and the polymer composites heating system with positive temperature coefficient feature just is applied in practice.2, the heater that has the positive temperature coefficient of resistivity feature can change with room temperature and increase and decrease its resistance sizes control thermal output simultaneously, and the implementation method that need control energy consumption output by room temperature is provided.This function is used in the febrile state of plane, and room temperature is bigger than linear fever body, therefore highly sensitive from temperature control with heating face direct contact surface.When room temperature enters under the heat-seal state, when resistivity constantly rose near non-conductor, the thermal output function also disappeared thereupon, had guaranteed the safety of whole heating process.3, the present invention adopts the plane heating, utilizes the planar radiation heat radiation, enlarges area of dissipation, improves radiating efficiency, and room temperature is on average risen provides prerequisite.Radiator heat-dissipation commonly used is concentrated, and relies on convection current to transmit and heats up, and the efficient that comprehensively heats up is low.The plane radiating mode more helps providing energy saving condition.
Be described further below in conjunction with the embodiment of accompanying drawing the preparation method of plane macromolecule compound material heating sheet of the present invention and heating base material thereof.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 is the structural representation of electrode among the present invention;
Embodiment
Embodiment one: plane macromolecule compound material heating sheet of the present invention, and its structure is referring to shown in Fig. 1,2, and it comprises heating base material, electrode, auxiliary electrode and protection insulating barrier, and wherein heating base material is made according to the following step:
1, plane composite material is made by following raw materials in part by weight; Directly lock 35 parts of polyethylene, 28 parts of conductive carbon blacks, 1.5 parts in antioxidant, 1.5 parts of composite nano utmost point titanium oxide with 34 parts of metallocene PEs, low-density.
2, adopt the raw material of aforementioned proportion configuration, mixingly pulverize at plastic crusher in flakes in 130 ℃ through double roll mill, again through single screw extrusion machine in 180 ℃ of extruding pelletizations, make masterbatch mix.
3, masterbatch mix is through double screw extruder consolute, dispersion, plasticizing under 160-180 ℃ of state.
4, directly enter single screw extrusion machine and extrude through the sheet forming mould under 150-170 ℃ of state, the die orifice extrusion temperature is guaranteed between 155-163 ℃.
5, the sheet material of extruding is fixed to 0.3-0.4MM thickness sheet material through three-roller calendar.
6, through the electron accelerator crosslinking electron beam irradiation, gel fraction is scope between 68%-75%.
The banded Copper Foil that is parallel to each other is set as positive and negative electrode respectively in the both sides of the heating base material of making through above-mentioned steps, and this positive and negative electrode connects power supply by electric wire, cover two aluminium foils again as auxiliary electrode in the heating base material interval that has covered parallel positive and negative electrode, these auxiliary electrodes are parallel to the zone between positive and negative electrode and five equilibrium positive and negative electrode.
Protection insulating barrier described in the present embodiment; select the aluminium foil of 0.05/0.05/0.05MM thickness/poly-for use to benzene dipotassium ethyl glycol fat/polyethylene laminated film; the polyethylene face of laminated film and heating base material are provided with the surface of electrode and auxiliary electrode and fit; compound through two roller high temperature compounding machines in 100-110 ℃ of roll extrusion; select the poly-of 0.05/0.05MM thickness for use to benzene dipotassium ethyl glycol fat/polyethylene laminated film; fit in another surface of the polyethylene face of laminated film and heating base material, compound in 100-110 ℃ of roll extrusion through two roller high temperature compounding machines.
The heating sheet that obtains through above-mentioned making clamps up and down with two thick aluminium sheets of 3mm, be positioned in 60-70 ℃ the electrothermal oven, heat treatment 24 hours, entering room temperature again placed 48 hours under 20-23 ℃ of normal temperature, after the sheet that will generate heat inserts lead, put into refrigerator and set refrigerated storage temperature-1-0 ℃, apply the energising of 220V voltage, measure its startup immediate current and obtain 2.33A/M
2The sheet that will generate heat is put into electrothermal oven and is set 30 ℃ of working temperatures, applies the energising of 220V voltage, measures its thermal output merit 102W/M
2Again electrothermal oven is set 70 ℃ of working temperatures, apply the energising of 220V voltage, measure its thermal output merit 60.8W/M
2Again electrothermal oven is set 120 ℃ of working temperatures, apply the energising of 220V voltage, measure its thermal output 0.7W/M
2
Embodiment two:
Its manufacture method is identical with example one, just heating base material is made into 1700mm X 250mm X 0.4mm rectangle heating sheet, behind two positive and negative electrodes of the rectangle heating parallel covering in sheet both sides, cover the auxiliary electrode of two parallel trisections again, under 24.6 ℃ of room temperatures, apply the energising of 220V voltage, 16 test points evenly distribute on its surface, measure 42.5 ℃ of maximum temperatures, 38.6 ℃ of minimum temperatures, the temperature difference are 3.9 ℃.
Embodiment three:
Its manufacture method is identical with example two, behind two positive and negative electrodes of the rectangle heating parallel covering in sheet both sides, cover the electrode of parallel two five equilibriums again, under 24.5 ℃ of room temperatures, apply the energising of 220V voltage, 16 test points that evenly distribute on its surface measure 47. ℃ of maximum temperatures, 34.5 ℃ of minimum temperatures, the temperature difference are 12.5 ℃.
Embodiment four:
Its manufacture method is identical with example two, behind two positive and negative electrodes of the rectangle heating parallel covering in sheet both sides, cover the electrode of three parallel quarterings again, under 24.3 ℃ of room temperatures, apply the energising of 220V voltage, 16 test points that evenly distribute on its surface measure 41.3 ℃ of maximum temperatures, 37.7 ℃ of minimum temperatures, the temperature difference are 3.6 ℃.
Embodiment five:
Its manufacture method is identical with example two, behind two positive and negative electrodes of the rectangle heating parallel covering in sheet both sides, cover the electrode of four parallel five five equilibriums again, under 24.8 ℃ of room temperatures, apply the energising of 220V voltage, 16 test points that evenly distribute on its surface measure 43.8 ℃ of maximum temperatures, 39.4 ℃ of minimum temperatures, the temperature difference are 4.4 ℃.Its highest temperature concentrates on positive electrode one side, and minimum temperature concentrates on negative electrode one side.
Embodiment six:
Its manufacture method is identical with example two, only at two positive and negative electrodes of the rectangle heating parallel covering in sheet both sides, do not establish auxiliary electrode, under 24.5 ℃ of room temperatures, apply the energising of 220V voltage, 16 test points that evenly distribute on its surface measure 49.8 ℃ of maximum temperatures, 32.6 ℃ of minimum temperatures, the temperature difference are 17.2 ℃.
Claims (1)
1. plane macromolecule compound material heating sheet, it is characterized in that: comprise heating base material, electrode, auxiliary electrode and protection insulating barrier, wherein heating base material adopts the material that is the positive temperature coefficient feature to make the sheet rectangle, the positive and negative electrode that is parallel to each other is set respectively in its both sides, and this positive and negative electrode connects power supply by electric wire, cover the auxiliary electrode more than two again in the heating base material interval that has covered parallel positive and negative electrode, this auxiliary electrode is parallel to the zone between positive and negative electrode and five equilibrium positive and negative electrode;
Described protection insulating barrier is coated on the skin of the heating base material with electrode and auxiliary electrode; Described protection insulating barrier adopts PETG/polyethylene laminated film or aluminium foil/PETG/polyethylene laminated film, and the polyethylene face of laminated film is fitted with the heating base material with electrode and auxiliary electrode;
The preparation method of described heating base material is as follows:
A, heating base material are made by following raw materials in part by weight:
Low-density is directly locked polyethylene 35-40 part
Metallocene PE 25-35 part
Conductive carbon black 25-35 part
Antioxidant 1-2 part
Composite nano-grade titanium oxide 1-2 part;
B, the raw material that adopts aforementioned proportion to dispose are pulverized by the mixing back of double roll mill, through the single screw extrusion machine extruding pelletization, make masterbatch mix;
C, above-mentioned masterbatch mix are again through double screw extruder consolute, dispersion, plasticizing under 160-180 ℃ of state;
D, directly enter single screw extrusion machine, extrude through the sheet forming mould under 150-170 ℃ of state, the die orifice extrusion temperature is guaranteed between 155-163 ℃;
E, the sheet material of extruding are fixed to sheet material through three-roller calendar;
Sheet material after f, the above-mentioned typing, through the electron accelerator crosslinking electron beam irradiation, the scope of gel fraction between 68%-75%.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2006101458987A CN101193467B (en) | 2006-11-22 | 2006-11-22 | Making method for plane macromolecule compound material heating sheet and its heating base material |
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| CN2006101458987A CN101193467B (en) | 2006-11-22 | 2006-11-22 | Making method for plane macromolecule compound material heating sheet and its heating base material |
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| CN101193467A CN101193467A (en) | 2008-06-04 |
| CN101193467B true CN101193467B (en) | 2010-06-30 |
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| CN108184507A (en) * | 2015-04-21 | 2018-06-22 | 吴昊 | A kind of agricultural cultivation greenhouse |
| CN111356252A (en) * | 2020-04-03 | 2020-06-30 | 苏州星烁纳米科技有限公司 | Electrothermal film, conductive silver paste and preparation method of electrothermal film |
| CN111303582A (en) * | 2020-04-16 | 2020-06-19 | 宁波堇山新材料有限公司 | Polymer prefabricated part, heating sheet adopting polymer prefabricated part and preparation method of heating sheet |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2181789Y (en) * | 1993-06-22 | 1994-11-02 | 万得电器有限公司 | All-enclosed surface-non-charging PTC heater |
| CN2236709Y (en) * | 1995-06-29 | 1996-10-02 | 刘伟安 | Ceramic heating element assembly |
| CN2331142Y (en) * | 1998-02-09 | 1999-07-28 | 惠恒荣 | High-temperature PTC energy-saving safe long-life exothermic plate |
| CN1254248A (en) * | 1999-11-19 | 2000-05-24 | 北京化工大学 | Flexible rubber-plastic planar heating body and its preparation method |
| CN2671279Y (en) * | 2003-12-22 | 2005-01-12 | 杨胜仲 | Planar heating pieces |
-
2006
- 2006-11-22 CN CN2006101458987A patent/CN101193467B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2181789Y (en) * | 1993-06-22 | 1994-11-02 | 万得电器有限公司 | All-enclosed surface-non-charging PTC heater |
| CN2236709Y (en) * | 1995-06-29 | 1996-10-02 | 刘伟安 | Ceramic heating element assembly |
| CN2331142Y (en) * | 1998-02-09 | 1999-07-28 | 惠恒荣 | High-temperature PTC energy-saving safe long-life exothermic plate |
| CN1254248A (en) * | 1999-11-19 | 2000-05-24 | 北京化工大学 | Flexible rubber-plastic planar heating body and its preparation method |
| CN2671279Y (en) * | 2003-12-22 | 2005-01-12 | 杨胜仲 | Planar heating pieces |
Non-Patent Citations (1)
| Title |
|---|
| JP特开2005-93076A 2005.04.07 |
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