WO2017114334A1

WO2017114334A1 - Composite ptc electrically-conductive polymer material film self-thermal control and thermally insulated plastic pipe

Info

Publication number: WO2017114334A1
Application number: PCT/CN2016/111977
Authority: WO
Inventors: 徐宝安
Original assignee: 淄博环能海臣环保技术服务有限公司; 徐宝安
Priority date: 2015-12-29
Filing date: 2016-12-25
Publication date: 2017-07-06
Also published as: CN106594446A

Abstract

A composite PTC electrically-conductive polymer material film self-thermal control and thermally insulated plastic pipe, comprising an electrically insulated pipe (1), a PTC electrically-conductive polymer material film (3), electric connection lead electrodes (2), a thermally insulating pipe-in-pipe (4), and a thermally insulating pipe-on-pipe (6). Provided on the outer wall of the electrically insulated pipe are at least two lead electrodes, symmetrically distributed, wound, and fixed on the outer pipe wall of the electrically insulated pipe, the PTC electrically-conductive polymer material film is evenly distributed, extruded, wrapped around, and fixed on the at least two lead electrodes, thus forming a PTC electrically-conductive polymer material film wrapped pipe-shaped layer in which the PTC electrically-conductive polymer material film has great electrical connection to the lead electrodes. The plastic pipe thermally insulated by an electrically insulating sandwiched air layer thus extruded is the thermally insulating pipe-in-pipe and the thermally insulating pipe-on-pipe sleeved together. Provided between the two pipes are at least two symmetrically and evenly distributed positioning support ribs (5).

Description

Description: A composite PTC conductive polymer material film self-regulating thermal insulation plastic tube

[0001] The present invention relates to a composite PTC conductive polymer material film self-regulating and heat-insulating plastic tube, belonging to the field of heat preservation tubes.

Background technique

[0002] At present, most known pipes for solar water heaters are aluminum-plastic composite pipes, plastic pipes, or materials such as metal pipes. In the winter, when the pipeline is poorly insulated, the pipeline is often frozen. Moreover, due to the expansion of the pipeline, the water and sewage pipelines are often frozen and cracked, which may result in failure to use normally. For some organic chemical products, the temperature is low and the delivery is more difficult. Since the pipe is insulated, even if the temperature rises, the ice inside the pipe is not easily degraded. In order to solve the above problems, it is common to prevent the upper and lower water pipes from freezing and cracking by means of a heating cable or emptying. Since the heating cable is installed on the outer wall of the pipeline, it cannot be in good contact with the pipeline, the thermal resistance is increased, and the heat utilization rate of the heating cable is low, so that the power consumption is large, the ice-making performance is poor, and the application effect is changed. Poor, and often a fire, not safe enough. However, the venting type antifreeze device has the possibility of storing water due to the installation of the pipeline, so that the drainage of the pipeline is not smooth, and the problem of the frozen plug still occurs, so that its application is greatly restricted. The heating cable made of PTC conductive polymer material has been commercialized and marketed in China. However, PTC conductive polymer materials have not been used to make self-regulating and heat-insulating plastic tubes. technical problem

[0003] Known pipes for solar water heaters are mostly aluminum-plastic composite pipes, plastic pipes, or materials such as metal pipes. In the winter, when the pipeline is poorly insulated, the pipeline is often frozen. Moreover, due to the expansion of the pipeline, the water and sewage pipelines are often frozen and cracked, which may result in failure to use normally. For some organic chemicals, the temperature is low and the delivery is more difficult. Due to the insulation of the pipes, the ice inside the pipes is not easily degraded even if the temperature rises.

Problem solution

Technical solution

[0004] In order to solve the above problems, a composite PTC conductive polymer material film self-controlled temperature heat preservation plastic tube was invented.

. It can improve the strength of the insulated plastic tube, improve the reliability of the insulation, and achieve a whole with a small amount of electrical energy. The rapid development of the pipe and the heating and insulation of water and other liquid media.

[0005] The technical solution adopted by the present invention to solve the technical problem thereof is: a composite PTC conductive polymer material film self-controlled temperature and heat preservation plastic tube, including an electric insulating tube, a PTC conductive polymer material film, an electrical connection wire electrode, a plastic tube. A composite PTC conductive polymer material film self-regulating and heat-insulating plastic tube, on the outer wall of the electric insulating tube, at least two wire electrodes are arranged, and symmetrically distributed and fixed on the outer tube wall of the electric insulating tube, PTC conductive polymerization The material film is evenly distributed, and the extrusion coating is fixed on at least two wire electrodes to form a PTC conductive polymer material film which is well electrically connected to the wire electrode to wrap the tubular layer. A PTC conductive polymer material film heating circuit is constructed in parallel with a package of a PTC conductive polymer material film through at least two wire electrodes. Or on the outer wall of the electric insulating tube, a film of P TC conductive polymer material which is wrapped around the outer wall of the electric insulating tube is wrapped to wrap the tubular layer. After that, at least two wire electrodes are arranged, which are symmetrically distributed and fixed on the outer tube wall of the electric insulating tube, and the PTC conductive polymer material film is evenly distributed, and is extrusion-wrapped and fixed on at least two wire electrodes to form PTC conductive polymerization. The PTC conductive polymer material film having a good electrical connection between the material film and the wire electrode surrounds the tubular layer. A PTC conductive polymer material film heating circuit is constructed in parallel with the package of the PTC conductive polymer material film through at least two wire electrodes. Electrically connected to the wire electrode or coated with solder. The PTC conductive polymer material film wraps the tubular layer and the wire electrode, and at least closely wraps the electrically insulating air sandwich heat insulating plastic tube manufactured by the extrusion process. Extruded electrically insulated air interlayer The insulated plastic tube is a set of two tubes. Between the two tubes, there are at least two symmetrically distributed positioning support ribs. The metal conductor is electrically heated and insulated on the inner wall of the electric insulating tube of the plastic tube or combined with other tubes, the metal conductor is electrically heated to heat the plastic tube, and the outer tube wall of the annular hollow interlayer air heat insulating tube is combined with the heat insulating tube layer of other materials.

[0006] A composite PTC conductive polymer material film self-heating and insulating plastic tube, comprising an electric insulating tube, a PTC conductive polymer material film, an electrical connecting wire electrode, and a plastic tube. A composite PTC conductive polymer material film self-regulating and heat-insulating plastic tube, on the outer wall of the electric insulating tube, at least two wire electrodes are arranged, symmetrically distributed and fixed on the outer tube wall of the electric insulating tube, PTC conductive polymerization The film of the material is evenly distributed, and the extrusion coating is fixed on at least two wire electrodes to form a PTC conductive polymer material film which is well electrically connected to the wire electrode of the PTC conductive polymer material film to wrap the tubular layer. A PTC conductive polymer material film heating circuit is constructed in parallel with the PTC conductive polymer material film through at least two wire electrodes. Or on the outer wall of the electric insulating tube, the PTC conductive polymer material film which is wrapped around the outer wall of the electric insulating tube is wrapped to wrap the tubular layer. After that There are two wire electrodes, which are symmetrically distributed and fixed on the outer tube wall of the electric insulating tube. The PTC conductive polymer material film is evenly distributed, and is extrusion-wrapped and fixed on at least two wire electrodes to form p _TC conductive polymer. The _PTC conductive polymer material film in which the material film is electrically connected to the wire electrode wraps the tubular layer. A PTC conductive polymer material film heating circuit is constructed in parallel with the PTC conductive polymer material film through at least two wire electrodes. Electrically connected to the wire electrode or coated with solder. The PTC conductive polymer material film is wrapped on the tubular layer and the wire electrode, and is laminated with an adhesive film layer. The adhesive film layer is at least tightly wrapped with an electrically insulating air interlayer insulating plastic tube manufactured by an extrusion process. The extruded electrically insulated air sandwich insulation plastic tube is a set of two tubes, and at least two symmetrically distributed positioning support ribs are disposed between the two tubes. The metal conductor is electrically heated and insulated on the inner wall of the electric insulating tube of the plastic tube or combined with other tubes, the metal conductor is electrically heated to heat the plastic tube, and the outer tube wall of the annular hollow interlayer air heat insulating tube is combined with a heat insulating tube layer of other materials.

[0007] A composite PTC conductive polymer material film self-heating and insulating plastic tube, the manufacturing process thereof comprises the following steps

[0008] (1) Preparation of PTC conductive polymer material film: The PTC conductive polymer material is 60 to 70 parts by weight of a polypropylene matrix resin, 10 to 20 parts by weight of a fluororubber, 10 to 20 parts by weight of a carbon black, and an auxiliary agent. The composition is 5 to 10 parts by weight, and the components are weighed and added to an internal mixer for plasticization, and the plasticizing temperature is 180 to 200 ° C, and the mixing time is 5 to 10 minutes.

[0009] (2) Granulation: The plasticized material in the step (1) is top and bottom in a twin-roll mill, and then pelletized by a pelletizer, and the obtained pellets are secondarily granulated on a twin-screw extruder. .

[0010] (3) The prepared electrically insulating plastic tube is wound on the outer wall of the electrically insulating plastic tube by a winding machine, and the tube head of the wound electrically insulated plastic tube is inserted into the screw extruder. In the die. The pellet of the step (2) is extruded together with an electrically insulating plastic tube wound with two tinned copper wires in a screw extruder to obtain a self-heating insulated tube. Or on the outer wall of the electric insulating tube, the PTC conductive polymer material film which is wrapped around the outer wall of the electric insulating tube is wrapped to wrap the tubular layer; the PTC conductive polymer material film on the tubular layer of the electrically insulating tube is passed through the winding machine The outer wall of the electrically insulated plastic tube is wound, and the tube head of the wound electrically insulated plastic tube is inserted into the die of the screw extruder. The pellet of the step (2) is extruded together with an electrically insulating plastic tube wound with two tinned copper wires in a screw extruder to obtain a self-heating thermal insulation tube.

[0011] (4) inserting the tube head of the self-controlled temperature heat preservation tube into the die of the screw extruder, directly or by applying bonding After the glue is inserted into the die of the screw extruder, the outer surface of the self-controlled temperature heat insulating tube is composited with an electrically insulating plastic tube.

[0012] (5) Irradiation cross-linking: The self-controlled temperature-insulated plastic tube obtained in the step (3) is irradiated and cross-linked by an electron accelerator to obtain a self-controlled temperature-insulated plastic tube of the composite PTC conductive polymer material film.

[0013] A composite PTC conductive polymer material film self-temperature-controlled heat-insulating plastic tube, the PTC conductive polymer material is composed of 65 parts by weight of a polypropylene matrix resin, 15 parts by weight of a fluororubber, 15 parts by weight of carbon black, and 8 weight of an auxiliary agent. Composition

[0014] A composite PTC conductive polymer material film self-temperature-controlled thermal insulation plastic tube, the PTC conductive polymer material auxiliary agent is an antioxidant, a crosslinking sensitizer, a flame retardant, a stabilizer and a dispersant More than one species.

[0015] A composite PTC conductive polymer material film self-temperature-controlled heat-insulating plastic tube, the electrical connection wire electrode comprises a copper wire, and the electrical connection wire electrode comprises a single-strand wire, a multi-strand wire, a ribbon wire, a copper steel multi-strand wire Composite wire, copper steel ribbon composite wire. The adhesive is a conventional adhesive or an oxygen barrier adhesive.

[0016] A composite PTC conductive polymer material film self-heating and insulating plastic tube, the electric insulating tube is a plastic tube, a glass tube, a glass tube or a ceramic tube. The oxygen barrier adhesive is applied to the junction between at least one layer of the electric heating composite plastic heating pipe.

[0017] A composite PTC conductive polymer material film self-temperature-controlled heat-insulating plastic tube, the inner wall of the electric insulating tube is composited with a metal tube, a glass tube, a ceramic tube, a cement tube, and a glass tube. The oxygen barrier adhesive is applied to the junction between the at least one layer of the tube of the electric heating heating composite heating pipe.

[0018] A composite PTC conductive polymer material film self-regulating and heat-insulating plastic tube, which is composited with a tube of other material on the inner surface of the electrically insulating plastic tube, firstly or directly coating the tube head of other material tubes After the adhesive is applied, it is inserted into a die of a screw extruder, and an electrically insulating plastic tube is extruded thereon. Repeat (3) to wind the outer wall of the electrically insulated plastic tube by a winding machine, and insert the tube head of the wound electrically insulated plastic tube into the die of the screw extruder. The pellet of the step (2) is extruded together with an electrically insulating plastic tube wound with two tinned copper wires in a screw extruder to obtain a self-heating thermal insulation tube. (4) The self-controlled temperature heat preservation pipe head will be inserted into the die of the screw extruder, directly or after applying the adhesive glue, and then enter the die of the screw extruder to heat the temperature control. The outer surface of the tube, composite electrically insulated plastic tube. (5) Irradiation cross-linking: The self-controlled temperature and heat-insulating plastic tube obtained in the step (3) is irradiated and cross-linked by an electron accelerator to obtain a self-controlled temperature and heat-insulating plastic tube of the composite PTC conductive polymer material film. [0019] A composite PTC conductive polymer material film self-controlled temperature heat-insulating plastic tube, the metal conductor electrically heated and insulated plastic tube annular hollow interlayer air insulation tube between the inner and outer tube interlayer, filled with other insulation materials. On the outer surface of the annular hollow interlayer air-insulation tube of the electric heating plastic composite pipe, other tubes are tightly packed. The other tube is a foaming material insulation tube, and the outer surface of the foam material insulation tube is self-skinning or a composite skin. The outer surface of the outer tube of the annular hollow interlayer air insulation tube is provided with a reflective film, or the outer surface of the outer surface of the annular hollow interlayer air insulation tube is provided with a reflective film, or the outer surface of the outer surface of the heat insulating material tube is provided with a reflective film. . Or at least one of an outer surface of the annular hollow interlayer air heat insulating tube, an outer surface of the foamed material heat insulating tube, and an outer surface of the composite skin is coated with a reflective film, or a reflective film is laminated on the outer skin of each layer of the pipe .

Advantageous effects of the invention

Beneficial effect

[0020] A composite PTC conductive polymer material film self-regulating and heat-insulating plastic tube can quickly and evenly heat the inner wall of the pipeline along the electric heating wire with a small amount of electric energy to form a liquid flow path, so that the inside of the pipeline The hot water flows down the entire pipe to rapidly reduce the ice. The control component can control the power of the power supply, so that the heat generated by the wire can keep the insulated pipe from freezing, and the water in the pipe can be maintained at a certain temperature by controlling the power supply to realize the snoring water. The function of hot water is produced at the mouth. The production process is mature and simple, and the strength of the pipeline is greatly improved. Because there is water in the pipeline, the electric heating is not easy to generate overheating. By adjusting the power supply, the power can be controlled, which represents the future development direction of the thermal insulation pipe.

Brief description of the drawing

DRAWINGS

[0021] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0022] In the figure: 1 electrical insulation tube, 2 wire electrode, 3 PTC conductive polymer material film, 4 insulation tube inner tube, 5 positioning support ribs, 6 insulation tube outer tube, 7 reflection film, 8 plastic tube, 9 insulation Tube layer

[0023] In the first embodiment of the composition of FIG. 1 and FIG. 2: a composite PTC conductive polymer material film self-heating and insulating plastic tube, comprising an electric insulating tube 1, a PTC conductive polymer material film 3, an electrical connection wire electrode 2. Insulation tube inner tube 4 and heat insulation tube outer tube 6; on the outer wall of the electric insulation tube 1, at least two lead electrodes 2 are arranged, which are symmetrically distributed and fixed on the outer tube wall of the electric insulating tube 1, PTC conductive polymer The material film 3 is evenly distributed, and is extrusion-wrapped and fixed on at least two wire electrodes 2 to form a PTC conductive polymer material film 3 and a wire electrode 2 The electrically connected PTC conductive polymer material film 3 wraps the tubular layer; the extruded electrically insulating air interlayer insulating plastic tube is set together with the inner tube 4 of the heat insulating tube and the outer tube 6 of the heat insulating tube, and at least between the two tubes There are two symmetrically distributed positioning support ribs 5.

[0024] In the second embodiment of the composition of FIG. 3 and FIG. 4, the inner surface of the inner tube 4 of the heat insulating tube is provided with a reflective film 7, and the others are the same as those in FIG. 1 and FIG.

[0025] In the third embodiment of the composition of FIG. 5 and FIG. 6, the inner wall of the electric insulating tube 1 of the composite electric heating film with thermal insulation plastic tube is compounded with a plastic tube 8, and the other is equivalent to FIG. 1 and FIG.

In the fourth embodiment composed of FIG. 7 and FIG. 8, the composite insulating electric heating film is provided with a heat insulating tube layer on the outer wall of the insulating tube of the annular hollow interlayer air insulating tube. Others are equivalent to Figure 1 and Figure 2.

[0027] In the fifth embodiment of the composition of FIG. 9 and FIG. 10: the outer wall of the heat insulating tube of the annular hollow interlayer air heat insulating tube of the composite electric heating film heat-insulating plastic tube is composited with the heat insulating tube layer 9 and the composite electric heating film. The inner wall of the electrically insulating tube 1 of the thermal insulation plastic tube is compounded with a plastic tube 8, and the others are equivalent to those shown in Figs.

Claims

Claim

[Claim 1] A composite PTC conductive polymer material film self-heating and insulating plastic tube, including an electric insulating tube,

PTC conductive polymer material film, electrical connecting wire electrode, plastic tube, characterized in that: at least two wire electrodes are arranged on the outer wall of the electric insulating tube, and symmetrically distributed and fixed on the outer tube wall of the electric insulating tube, PTC The conductive polymer material film is uniformly distributed, and is extrusion-wrapped and fixed on at least two wire electrodes to form a PTC conductive polymer material film which is well electrically connected to the wire electrode to wrap the tubular layer; the composition passes through at least two a wire electrode, a PTC conductive polymer material film heating circuit is wrapped in parallel with the PTC conductive polymer material film; or a P TC conductive polymer material film wrapped around the outer wall of the electrically insulating tube is extruded on the outer wall of the electrically insulating tube a tubular layer; then at least two wire electrodes are arranged, symmetrically distributed and fixed on the outer tube wall of the electric insulating tube, and the PTC conductive polymer material film is evenly distributed, and is extrusion-wrapped and fixed on at least two wire electrodes to form PTC conductive polymer material film is electrically connected to the wire electrode, and the _PTC conductive polymer material film wraps the tubular layer

Forming a PTC conductive polymer material film heating circuit in parallel with the PTC conductive polymer material film through at least two wire electrodes; electrically connecting the wire electrodes, or coated with solder; the PTC conductive polymer material film wrapping the tubular layer and On the wire electrode, at least tightly wrapped with an electrically insulating air sandwich insulation plastic tube manufactured by an extrusion process; the extruded electrically insulated air sandwich insulation plastic tube is set together by two tubes, at least two between the two tubes Locating support ribs with uniform symmetry of roots; metal conductors for electrically heating and insulating plastic tubes on the inner wall of electrical insulating tubes or composite tubes with other tubes, metal conductors for electrically heating and insulating plastic tubes, annular hollow interlayer air-insulated tubes, or composite There are insulation tubes for other materials.

[Claim 2] a composite PTC conductive polymer material film self-heating and insulating plastic tube, including an electric insulating tube,

PTC conductive polymer material film, electrical connection wire electrode, adhesive glue, plastic tube, characterized in that: on the outer wall of the electric insulation tube, at least two wire electrodes are arranged, and the outer tube of the electric insulation tube is symmetrically distributed and wound On the wall, the p _TC conductive polymer material film is evenly distributed, and is extrusion-wrapped and fixed on at least two wire electrodes to form a PTC conductive polymer material film which is well electrically connected to the wire electrode to wrap the tubular layer; Constructing a PTC conductive polymer in parallel with a package of PTC conductive polymer material film through at least two wire electrodes The material film heating circuit; or on the outer wall of the electric insulating tube, the PTC conductive polymer material film which is wrapped around the outer wall of the electric insulating tube is wrapped to wrap the tubular layer; then at least two wire electrodes are provided, which are symmetrically distributed and fixed On the outer tube wall of the electric insulating tube, the PTC conductive polymer material film is evenly distributed, and is extrusion-wrapped and fixed on at least two wire electrodes to form a PTC conductive polymer material with good electrical connection between the PTC conductive polymer material film and the wire electrode. The film wraps the tubular layer; constitutes a PTC conductive polymer material film heating circuit in parallel with the PTC conductive polymer material film through at least two wire electrodes; electrically connects the wire electrode, or is coated with solder; PTC conductive polymer material film The tubular layer and the wire electrode are laminated with an adhesive film layer; the adhesive film layer is at least tightly wrapped with an electrically insulating air interlayer insulating plastic tube manufactured by an extrusion process; and the extruded electrically insulating air interlayer insulation The plastic tube is a set of two tubes together, and at least two symmetrically distributed positioning support ribs are arranged between the two tubes; The electrically insulated metal conductors tube wall heat insulation composite plastic pipe or other pipe, an annular metal conductor electrically heated hollow plastic interlayer insulating air duct on the outer wall of the pipe insulation, pipe insulation or complexed with layers of other materials.

[Claim 3] The composite PTC conductive polymer material film self-regulating temperature-maintaining plastic tube according to claim 1, or 2, wherein the manufacturing process comprises the following steps:

(1) Preparation of PTC conductive polymer material film: The PTC conductive polymer material is 60 to 70 parts by weight of a polypropylene base resin, 10 to 20 parts by weight of a fluororubber, 10 to 20 parts by weight of a carbon black, and an auxiliary agent 5 to 10 The composition of parts by weight, weigh each component into plastic mixer, the plasticizing temperature is 180~200 ° C, and the mixing time is 5~10 min;

(2) granulation: the plasticized material in the step (1) is placed on a double-roll mill, and then granulated by a pelletizer, and the obtained pellets are granulated twice on a double-screw extruder;

(3) The prepared electrically insulating plastic tube is wound on the outer wall of the electrically insulating plastic tube by a winding machine, and the tube head of the wound electrically insulated plastic tube is inserted into the die of the screw extruder. The pellet of the step (2) is extruded together with an electrically insulating plastic tube wound with two tinned copper wires in a screw extruder to obtain a self-heating heat insulating tube; or on the outer wall of the electric insulating tube, Extruding a PTC conductive polymer material film wrapped around the outer wall of the electrically insulated tube to wrap the tubular layer; placing the electrically insulating tube on the tubular layer of the PTC conductive polymer material film, electrically insulating by a winding machine Winding the outer wall of the plastic pipe, and inserting the pipe head of the electrically insulated plastic pipe after winding into the die of the screw extruder; and pulverizing the pellet of step (2) in the screw extruder The electrically insulated plastic tube of the tin-plated copper wire is extruded together to obtain a self-heating and heat-insulating tube;

(4) Insert the tube head of the self-controlled temperature heat preservation tube into the die of the screw extruder, directly or after applying the adhesive glue, insert it into the die of the screw extruder, and heat the temperature control. a composite electrically insulated plastic tube on the outer surface of the tube;

(5) Irradiation cross-linking: Irradiation cross-linking of the self-regulating and heat-insulating plastic tube prepared in step (3) by using an electron accelerator to obtain a composite PTC conductive polymer material film self-controlled temperature and thermal insulation plastic tube

The composite PTC conductive polymer material film self-heating and insulating plastic tube according to claim 1, 2 or 3, wherein: the PTC conductive polymer material comprises 65 parts by weight of a polypropylene matrix resin and 15 parts by weight of a fluororubber. And 15 parts by weight of carbon black and 8 parts by weight of auxiliary agent.

The composite PTC conductive polymer material film self-regulating and heat-insulating plastic tube according to claim 1, 2 or 3, wherein: the auxiliary agent of the PTC conductive polymer material is an antioxidant, a crosslinking sensitizer, Two or more of a flame retardant, a stabilizer, and a dispersant.

The composite PTC conductive polymer material film self-heating and insulating plastic tube according to claim 1, 2 or 3, wherein: the electrical connection wire electrode comprises a copper wire, and the electrical connection wire electrode comprises a single strand wire, a plurality of strands Conductor, strip conductor, copper-steel multi-strand composite conductor, copper-steel ribbon composite conductor; adhesive is conventional adhesive or oxygen barrier adhesive.

The self-controlled temperature and heat-insulating plastic tube of the composite PTC conductive polymer material film according to claim 1, 2 or 3, wherein: the electrical insulating tube is a plastic tube, a glass tube, a glass tube or a ceramic tube; The glue is applied to the joint between at least one layer of the electric heating plastic heating pipe.

The composite PTC conductive polymer material film self-heating and insulating plastic tube according to claim 1, 2 or 3, wherein: the inner wall of the electric insulating tube is composited with a metal tube, a glass tube, a ceramic tube and a cement tube. , glass steel pipe; oxygen barrier adhesive coating at the junction between at least one layer of pipe of electric heating composite plastic heating pipe.

Self-controlled temperature of a composite PTC conductive polymer material film according to claim 1, 2 or Insulation plastic tube, which is characterized in that: on the inner surface of the electrically insulating plastic tube, the tube of other materials is composited, and the tube head of the other material tube is directly inserted into the screw extruder after directly or after applying the adhesive glue. In the die, an electrically insulating plastic tube is extruded thereon; and then (3) is wound on the outer wall of the electrically insulating plastic tube by a winding machine, and the tube head of the wound electrically insulated plastic tube is inserted into In the die of the screw extruder; the pellet of the step (2) is extruded in a screw extruder together with an electrically insulating plastic tube wound with two tinned copper wires to obtain a self-heating heat insulating tube; 4) The self-controlled temperature heat preservation pipe head will be inserted into the die of the screw extruder, directly or after applying the adhesive glue, and then enter the die of the screw extruder, and the self-controlled temperature heat preservation pipe The outer surface of the composite electrically insulating plastic tube; (5) Irradiation cross-linking: The self-controlled temperature-insulated plastic tube obtained in the step (3) is irradiated and crosslinked by an electron accelerator to obtain a composite PTC conductive polymer material film. Self-controlled temperature insulation plastic tube.

[Claim 10] The composite PTC conductive polymer material film self-heating and heat-insulating plastic tube according to claim 1, 2 or 3, wherein: the metal conductor electrically heats the plastic tube to seal the hollow hollow interlayer air insulation tube The inner and outer tube interlayers are filled with other thermal insulation materials; the outer surface of the annular hollow interlayer air insulation tube of the electric heat tracing plastic composite tube is tightly compounded with other tubes; the other tubes are foamed material insulation tubes, and the other tubes are foamed material insulation tubes. The outer surface of the thermal insulation tube of the foam material is self-skinning or a composite skin; the outer surface of the outer tube of the annular hollow interlayer air insulation tube is provided with a reflective film, or the outer surface of the outer surface of the annular hollow interlayer air insulation tube composite is provided a reflective film, or a composite film on the outer surface of the heat insulating material tube; or an outer surface of the annular hollow interlayer air heat insulating tube, an outer surface of the foaming material heat insulating tube, and at least one of the outer surface of the composite skin Composite with a reflective film; or a reflective film on the outer skin of each layer of pipe.