JP3822967B2 - Spiral tubular heater and manufacturing method thereof - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention is suitable for uses such as heaters having good adhesion to pipes and good thermal efficiency, and in particular, a shape-retaining spiral tubular heater that can be used for heat insulation of pipes of semiconductor manufacturing apparatuses and analytical instruments, and the like It relates to the manufacturing method.
[0002]
[Prior art]
Conventionally, in order to prevent solidification and non-adherence of a substance to be transported to a pipe constituting an analytical instrument such as a liquid chromatograph or mass spectrometer or a medical fluid in a medical instrument, the pipe is heated and kept warm. In some cases, the pipe is heated in order to evaporate the substance not attached to the inner surface and secure a degree of vacuum. Furthermore, the water pipe may be kept warm and heated to prevent the water pipe from freezing.
In such a case, conventionally, a flexible sheet heating element such as a ribbon heater is generally formed in a belt shape and wound around a pipe.
[0003]
[Problems to be solved by the invention]
However, the piping system of the pipe is generally provided in a narrow space between devices, and it is difficult to wrap and attach a sheet heating element around the pipe. Has poor adhesion to pipes. For this reason, the thermal efficiency is low, and therefore the temperature cannot be accurately controlled.
[0004]
Therefore, the object of the present invention is to easily and easily adjust the object to be heated without being restricted by the size of the object to be heated even if both ends are connected to a device or the like and have little freedom. A heater that can be mounted quickly and evenly, with good adhesion to the object to be heated, good thermal efficiency, accurate temperature control, and variable resistance of the heater And providing a manufacturing method thereof.
[0005]
[Means for Solving the Problems]
The present invention has achieved the above object by providing the following spiral tubular heater and a method for producing the same.
“An inner layer formed by spirally winding the heat resistant polymer tape A, an outer layer formed by spirally winding the heat resistant polymer tape B on the inner layer, and the inner layer A tape-like heating element wound in a spiral shape is provided between the inner layer and the outer layer of the spiral tubular laminate composed of an adhesive layer for bonding the outer layer, and the tape-like heating element Is a heat-resistant polymer tape C in which a heater wire or a conductive foil is wound in a spiral shape, and the heat-resistant polymer tapes A, B, and C are aromatic polyimide tapes, respectively. Sex spiral tubular heater. "
“An inner layer formed by spirally winding the heat resistant polymer tape A, an outer layer formed by spirally winding the heat resistant polymer tape B on the inner layer, and the inner layer A tape-like heating element wound in a spiral shape is provided between the inner layer and the outer layer of the spiral tubular laminate composed of an adhesive layer for bonding the outer layer, and the tape-like heating element Is a shape-retaining spiral tubular heater, characterized in that the heater wire is a braid braided with heat-resistant fibers. "
“An inner layer is formed by winding a heat-resistant polymer tape A having an adhesive layer on one side around a long shape-giving member having the same outer shape as the object to be heated, spirally with the adhesive layer on the outside. A tape-like heating element is wound on the inner layer in a spiral shape, and a heat-resistant polymer tape B provided with an adhesive layer on one side is wound on the inner layer in a spiral shape with the adhesive layer on the outer side. A layer is formed, the adhesive layer is cured and laminated and integrated, and the formed spiral tubular laminate is removed from the shape-imparting member to obtain the shape-retaining spiral tubular heater of the present invention. Manufacturing method of spiral tubular heater. "
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the spiral tubular heater of the present invention and the manufacturing method thereof will be described in detail with reference to the drawings.
First, the spiral tubular heater of the present invention will be described with respect to the embodiment shown in FIGS.
FIG. 1 is a perspective view showing an example of the spiral tubular heater of the present invention, FIG. 2 is a partial cross-sectional view of the spiral tubular heater shown in FIG. 1 cut in parallel to the spiral core, and FIG. 2 is a partial perspective view showing a tape-like heating element used in the spiral tubular heater shown in FIG.
[0007]
As shown in FIGS. 1 and 2, the spiral tubular heater 1 of the present embodiment has an inner layer 2 formed by winding a heat-resistant polymer tape A in a spiral shape, and has a high heat resistance on the inner layer 2. An outer layer 3 formed by winding a molecular tape B in a spiral shape, an adhesive layer 4 for bonding the inner layer 2 and the outer layer 3, and a tape wound in a spiral shape in the adhesive layer 4 It is comprised from the spiral tubular laminated body which consists of the shape-like heat generating body 5. FIG.
As shown in FIG. 3, the tape-like heating element 5 is formed by winding a heater wire 51 around a heat-resistant polymer tape C in a spiral shape. Has been granted.
[0008]
The heat resistant polymer tape A forming the inner layer 2 of the spiral tubular laminate is made of an aromatic polyimide or an aromatic polyamide having a glass transition temperature or a melting point of 180 ° C. or more, and preferably has a thickness of 15 to 200 μm. In particular, a tape-like film having a width of 25 to 200 μm and a width of 3 to 50 mm is used. In particular, the linear expansion coefficient (CTE) at 50 to 300 ° C. is 60 × 10 ⁻⁵ cm / cm / ° C. or less (sometimes expressed in ppm), among which 3 to 5 × 10 ⁻⁵ cm / cm / An aromatic polyimide film or an aromatic polyamide film having a tensile elastic modulus of 200 to 1400 kg / mm ² at a temperature of ° C is preferably used. Among them, an aromatic polyimide film having a water absorption rate of 4% or less, particularly 3% or less is preferably used.
[0009]
Examples of the aromatic polyimide include 3,3 ′, 4,4′-biphenyltetracarboxylic dianhydride, pyromellitic dianhydride, and 3,3 ′, 4,4′-benzophenonetetracarboxylic dianhydride. It is obtained by polymerizing and imidizing an aromatic tetracarboxylic dianhydride such as p-phenylenediamine and 4,4′-diaminodiphenyl ether. In particular, what is obtained by using 3,3 ′, 4,4′-biphenyltetracarboxylic dianhydride as an aromatic polyimide in an amount of 15 mol% or more in the aromatic tetracarboxylic acid component is heat resistance, low linear expansion coefficient, It is preferable because of its low water absorption.
In addition, the above aromatic polyamide is, for example, an aromatic acid chloride such as 2-chloroterephthalic acid chloride or 2,5-dichloroterephthalic acid chloride, 2-chloro-p-phenylenediamine, 4,4′-diaminodiphenyl ether, or the like. Obtained by reaction with an aromatic diamine.
[0010]
The adhesive layer 4 forming the intermediate layer of the spiral tubular laminate is made of a heat-resistant thermoplastic adhesive, a thermosetting adhesive, preferably a thermosetting adhesive, and preferably laminated adhesive. The thickness of the agent layer in a dry state is 2 to 100 μm and the width is 3 to 50 mm.
The adhesive layer may be provided by winding a tape-like film with an adhesive, or after winding the tape-like film, an adhesive is applied to the tape-like film or an adhesive sheet is laminated. May be provided.
[0011]
Examples of the thermosetting adhesive include epoxy resin, NBR-phenolic resin, phenol-butyral resin, epoxy-NBR resin, epoxy-phenolic resin, epoxy-nylon resin, epoxy-polyester resin, epoxy- Examples thereof include acrylic resins, acrylic resins, polyamide-epoxy-phenolic resins, polyimide resins, and polyimidesiloxane-epoxy resins. Examples of the thermoplastic adhesive include polyimide, polyamideimide, polyetherimide, and polyesterimide.
[0012]
The heat-resistant polymer tape B forming the outer layer 3 of the spiral tubular laminate is an aromatic polyimide, aromatic polyamide, aromatic polyester, fluororesin or aromatic resin having a glass transition temperature or melting point of 180 ° C. or higher. A tape-like film made of a group polyamideimide, preferably having a thickness of 15 to 200 μm, particularly 25 to 200 μm, and a width of 3 to 50 mm is used. In particular, the coefficient of linear expansion (CTE) at 50 to 250 ° C. is 60 × 10 ⁻⁵ cm / cm / ° C. (may be expressed in ppm) or less, particularly 3 to 50 × 10 ⁻⁵ cm / cm / ° C. An aromatic polyimide film or an aromatic polyamide film having a tensile modulus of 200 to 1400 kg / mm ² is preferably used. Among them, an aromatic polyimide film having a water absorption rate of 4% or less, particularly 3% or less is preferably used.
[0013]
Further, as the heat-resistant polymer tape C forming the tape-like heating element 5, the same tape as the heat-resistant polymer tape A or B can be used. Examples of the heater wire 51 wound in a spiral shape include alloy wires such as a nichrome alloy, a nickel chrome iron alloy, and a nickel copper alloy. As the alloy wire, one having a thickness (diameter) of about 20 to 300 μm is used.
[0014]
A preferable method for producing the aromatic polyimide film and the aromatic polyamide film used as a material for forming the heat-resistant polymer tapes A, B and C will be described in more detail below.
The aromatic polyimide film can be produced, for example, as follows. First, the aromatic tetracarboxylic dianhydride and the aromatic diamine are polymerized in an organic polar solvent such as N, N-dimethylacetamide or N-methyl-2-pyrrolidone, and the logarithmic viscosity of the polymer (measurement temperature: 30). C, concentration: 0.5 g / 100 ml solvent, solvent: N-methyl-2-pyrrolidone) is 1 to 5, polymer concentration is 15 to 25% by weight, and rotational viscosity (30 ° C.) is 500 to 4500 poise. A polyamic acid (imidation rate: 5% or less) solution is obtained.
Subsequently, 0.01 to 1% by weight of a phosphorus compound, preferably an organic phosphorus compound such as (poly) phosphate ester and / or an amine salt of phosphate ester, or inorganic phosphorus, based on 100 parts by weight of this polyamic acid. Compound, and preferably 0.02-6 parts by weight of colloidal silica, silicon nitride, talc, titanium oxide, calcium phosphate and the like (preferably having an average particle size of 0.005 based on 100 parts by weight of polyamic acid) ˜5 μm, especially 0.005 to 2 μm) is added to prepare a polyamic acid solution composition.
This polyamic acid solution composition is cast as it is or added with a chemical imidizing agent, and cast onto a support surface having a smooth surface, dried to form a solidified film, and the solidified film is peeled off from the surface of the support.
Next, after applying a surface treatment liquid containing an aminosilane-based, epoxysilane-based or titanate-based surface treatment agent to one or both sides of the solidified film, it may be further dried.
If necessary, the solidified film obtained as described above is stretched in both directions and then heated at a temperature within the range of 350 to 500 ° C. while holding both edges in the width direction of the dried film. Then, it can be suitably produced as an aromatic polyimide film by drying and imidization.
The aromatic polyimide film obtained as described above is preferably heated at a temperature of about 200 to 400 ° C. under low tension or no tension, and is subjected to stress relaxation treatment and wound.
This aromatic polyimide film can be used as an aromatic polyimide film with improved adhesiveness as it is or after being subjected to surface treatment by corona discharge treatment, plasma treatment, ultraviolet irradiation, glow discharge treatment or flame treatment.
[0015]
The aromatic polyamide film can be produced, for example, as follows. An aromatic acid chloride and an aromatic diamine are synthesized by solution polymerization in an organic polar solvent or by interfacial polymerization using an aqueous medium. When acid chloride and diamine are used as monomers in the polymer solution, hydrogen chloride is formed as a by-product, so an inorganic neutralizer such as calcium hydroxide or an organic neutralizer such as ethylene oxide is used to neutralize this. Add.
The reaction between isocyanate and carboxylic acid is carried out in an aprotic organic polar solvent in the presence of a catalyst.
These polymer solutions may be used as a film-forming stock solution for forming a film as it is, or a polymer-forming stock solution may be prepared by isolating the polymer once and then redissolving it in the above solvent. An inorganic salt such as calcium chloride or magnesium chloride may be added as a dissolution aid to the film-forming stock solution. The polymer concentration in the stock solution is preferably 2 to 35% by weight.
[0016]
The spiral tubular heater 1 of the present embodiment configured as described above expands in the longitudinal direction as shown in FIG. 5 and returns to its original shape by releasing the extension force. The shape is maintained in an environment heated to a high temperature of about 200 ° C. and after being mounted on the heated object, with almost no change in shape such as outer diameter, uniformity and order.
[0017]
Next, the manufacturing method of the spiral tubular heater of the present invention will be described taking the manufacturing method of the spiral tubular heater 1 of the above embodiment as an example.
The spiral tubular heater 1 of the above embodiment has, for example, the same outer shape as the object to be heated (the shape may have an arbitrary shape such as a circular cross section or a square shape), for example, a long shape imparting member, for example, heat resistance Heat-resistant polymer tape A, preferably aromatic polyimide tape A, and outer layer 3 having the same width as or slightly narrower width than tape A The heat-resistant polymer tape C is formed by spirally winding an adhesive layer 4 and a heater wire for providing conductivity between both ends in the longitudinal direction between the conductive polymer tape B and preferably the aromatic polyimide tape B. When the tape-like heating element 5 is disposed and the adhesive layer 4 is formed of a thermoplastic adhesive, pressure is applied to the laminated body to heat it to a glass transition temperature or a temperature equal to or higher than the melting point and cool it. When the adhesive layer 4 is formed of a thermosetting adhesive, it is formed after the adhesive is cured and laminated and integrated by heating to a temperature higher than the curing temperature. It is obtained by removing the spiral tubular laminate from the shape imparting member.
[0018]
The above method can be preferably carried out, for example, as follows. First, a thermosetting adhesive is applied to one side of a heat-resistant resin film that is a material for forming the inner layer 2 and the outer layer 3, and the dry thickness of the adhesive is 2 to 100 μm. Get the film. This film is slit to 3 to 50 mm to produce a heat-resistant polymer tape A with a thermosetting adhesive. The heat-resistant polymer tape A is wound spirally around a circular bar or pipe (shape-giving member) having a diameter of 5 to 50 mm with the adhesive surface facing outward, and both ends are fixed. Next, on the heat-resistant polymer tape A, a tape-like heating element 5 in which a heater wire is spirally wound around a heat-resistant polymer tape C narrower than the heat-resistant polymer tape A is wound in a spiral shape. . Next, a heat-resistant polymer tape B with a thermosetting adhesive having the same width as that of the heat-resistant polymer tape A or a little narrower is further formed thereon, and the heat-resistant polymer tape with the adhesive surface on the inside. It is wound in a spiral shape so as to overlap with the adhesive surface of A, and if necessary, the periphery is pressurized and fixed with a tape-like material or a linear material. And after heating to the temperature in the range of 150-400 degreeC, an adhesive agent is hardened | cured and laminated | stacked and integrated, and cooled, the formed spiral tubular laminated body is removed from a stick | rod or a pipe, "Heat resistant polymer tape A Spiral tubular of the present embodiment having a configuration of “inner layer 2 made of / thermosetting adhesive layer 4 / tape-like heating element 5 / thermosetting adhesive layer 4 / outer layer 3 made of heat-resistant polymer tape B”. The heater 1 can be obtained.
[0019]
The spiral tubular heater of the present invention is not limited to the above embodiment. For example, in the above embodiment, a heat-resistant polymer tape C in which the heater wire 51 is wound in a spiral shape is used as the tape-like heating element 5. Although used, the present invention is not limited to this, and instead of the heater wire 51, a heat-resistant polymer tape C in which a conductive foil is wound in a spiral shape may be used. Examples of the conductive foil include alloy foils such as a nichrome alloy, a nickel chromium iron alloy, and a nickel copper alloy, and those having a thickness of about 5 to 100 μm and a width of about 0.4 to 40 μm are used.
In addition, as the tape-like heating element 5, it is also preferable to use a braid obtained by knitting a heater wire 51 and a heat-resistant fiber 52 as shown in FIG.
As the heat-resistant fiber, polyimide fiber, glass fiber or the like is preferable, and the heater wire knitted with the fiber to form a braid is an alloy wire such as nichrome alloy, nickel chrome iron alloy, nickel copper alloy, and the thickness ( Those having a diameter of about 20 to 300 μm are used.
In addition, as the tape-like heating element, a tape-like heating element such as a braided string obtained by knitting the heater wire and a heat-resistant fiber, a heater wire, or a heat-resistant polymer tape C in which a conductive foil is spirally wound is applied in advance. A material coated with a heat resistant polymer material may be used.
[0020]
The spiral tubular heater of the present invention may be applied to a heated object as it is, or may be used after being cut to an appropriate length. Further, the outermost layer is a heat resistant foam sheet, You may use it, covering with a porous sheet.
In the case of a heated object having a complicated shape, the heated object may be covered using a combination of the spiral tubular heater of the present invention and a planar heater.
[0021]
Next, a method of mounting the spiral tubular heater of the present invention on the heated object will be described with reference to FIGS.
In order to attach the spiral tubular heater 1 of the present invention to the heated body (pipe) 10, first, as shown in FIG. 5, the spiral tubular heater 1 is extended in the longitudinal direction. Next, as shown in FIG. 6, a part of the object to be heated 10 is inserted into the gap of the heater expanded by extending, and the spiral tubular heater 1 is rotated in the direction of the arrow in the figure. The heated body 10 is taken into the spiral tubular heater 1 with the rotation, and the spiral tubular heater 1 can be easily and quickly mounted on the heated body 10. Further, since the spiral tubular heater 1 returns to its original shape by releasing the stretching force, it can be mounted evenly and orderly on the heated object 10.
Since the spiral tubular heater of the present invention can be attached to a heated body as described above, for example, even when both ends of the heated body are connected to a large-sized device or the like and there is almost no degree of freedom. It can be attached to the heated object relatively easily and quickly. In addition, since the diameter of the spiral tubular heater can be arbitrarily set, not only a heated object with a small degree of freedom but also a heated object with a large degree of freedom, and without being limited by the size of the rod or If it is a pipe shape, it can be applied to any object to be heated.
[0022]
【Example】
Examples of the present invention are shown below.
In each of the following examples, the physical properties of the polyimide film were measured by the following method.
Water absorption: measured according to ASTM D570-63 (23 ° C. × 24 hours)
Tensile modulus: measured according to ASTM D882-64T (MD)
Linear expansion coefficient (50 to 250 ° C. or 50 to 300 ° C.): A sample subjected to stress relaxation by heating at 300 ° C. for 30 minutes is measured with a TMA apparatus (tensile mode, 2 g load, sample length 10 mm, 20 ° C./min). ]
Reference example 1
To a polymerization tank having an internal volume of 100 liters, 54.6 kg of N, N-dimethylacetamide was added, and then 8.826 kg of 3,3 ′, 4,4′-biphenyltetracarboxylic dianhydride and 3.243 kg of paraphenylenediamine. Was added, and the polymerization reaction was carried out at 30 ° C. for 10 hours. The logarithmic viscosity of the polymer (measurement temperature: 30 ° C., concentration: 0.5 g / 100 ml solvent, solvent: N, N-dimethylacetamide) was 1.60, and the polymer concentration was A polyamic acid (imidation ratio: 5% or less) solution of 18% by weight was obtained.
In this polyamic acid solution, 0.1 parts by weight of monostearyl phosphate triethanolamine salt and 100 parts by weight of polyamic acid and 0.5 parts by weight (based on solid content) of an average particle size of 0.001. 08 μm colloidal silica was added and mixed uniformly to obtain a polyamic acid solution composition.
The rotational viscosity of this polyamic acid solution composition was 3000 poise. This polyamic acid solution composition is continuously extruded from a slit of a T-die mold onto a smooth support of a casting / drying furnace to form a thin film of the above composition, dried at 130 ° C. for 10 minutes, and from the support The film was peeled and cured in a curing furnace with the width direction held (from 200 ° C. to 450 ° C. for about 20 minutes) to obtain an aromatic polyimide film having a thickness of 75 μm. This film had a tensile modulus of 750 kg / mm ² , a linear expansion coefficient (50 to 300 ° C.) of 16 ppm, and a water absorption of 1.5%.
[0024]
Reference example 2
Aromatic having a thickness of 75 μm as in Reference Example 1, except that 6.007 kg of 4,4′-diaminodiphenyl ether was used in place of paraphenylenediamine and the amount of N, N-dimethylacetamide used was 67.6 kg. A polyimide film was obtained. This film had a tensile elastic modulus of 370 kg / mm ² , a linear expansion coefficient (50 to 250 ° C.) of 40 ppm, and a water absorption of 2.5%.
[0025]
Example 1
A tetrahydrofuran solution (solid content concentration: 25% by weight) of a polyimidesiloxane-based thermosetting adhesive [adhesive consisting of polyimidesiloxane, epoxy resin, phenolic resin and curing catalyst] on the 75 μm aromatic polyimide film produced in Reference Example 1. ) Was applied so that the thickness after drying was 30 μm, and dried at 100 ° C. to obtain a polyimide film with an adhesive. This film was slit to 10 mm width and 9.8 mm width to produce two types of tapes A and B with adhesive. A tape A having a width of 10 mm was wound around a stainless steel round bar having an outer diameter of 10 mm in a spiral shape with the adhesive layer facing outward, and both ends were fixed. Next, a tape-like heating element in which a 50 μm-diameter nichrome wire is spirally wound around the tape C produced by slitting the aromatic polyimide film produced in Reference Example 1 into a width of 3 mm on the tape A is spirally formed. After winding, both ends are fixed, and further, the above-mentioned 9.8 mm width adhesive tape B is wound in a spiral shape so that the adhesive layer is inside and overlaps the adhesive layer of tape A. The both ends were fixed.
Further, a Tetoron heat-shrink tape (width 4 mm, braid) is spirally wound thereon, heated in an oven at 100 ° C. for 1 hour and at 200 ° C. for 1 hour, and then the Tetron heat-shrink tape is peeled off and then at 250 ° C. for 1 hour. After heating to cure the adhesive, the adhesive was allowed to cool, and the formed spiral tubular laminate was removed from the stainless steel round bar to obtain a spiral tubular heater having a length of 10 cm. The resistance value of this spiral tubular heater was 1350Ω. Further, when this spiral tubular heater was attached to a stainless steel pipe having a diameter of 10 mm and a voltage of 100 V was applied to both ends, the temperature of the stainless steel pipe was 80 ° C., and the temperature was uniformly maintained.
[0026]
Example 2
Two types of adhesion of 10 mm width and 9.8 mm width were performed in the same manner as in Example 1 except that the 75 μm aromatic polyimide film manufactured in Reference Example 2 was used instead of the aromatic polyimide film manufactured in Reference Example 1. Tapes A and B with the agent were prepared. A tape A having a width of 10 mm was wound spirally around a stainless steel round bar having an outer diameter of 10 mm with the adhesive layer on the outside, and both ends were fixed. Next, a braided braid (width 4 mm) woven with glass fiber was spirally wound on the tape A while meandering a nichrome wire having a diameter of 50 μm, and both ends were fixed. A tape B with an adhesive having a width of 8 mm was wound in a spiral shape so as to overlap the adhesive layer of the tape A with the adhesive layer inside, and both ends were fixed.
Further, a Tetoron heat shrink tape (4 mm wide, braided string) was spirally wound thereon, and the adhesive was cured by heating in an oven at 100 ° C. for 1 hour, 200 ° C. for 1 hour, and 250 ° C. for 1 hour. Thereafter, it was allowed to cool, and the formed spiral tubular laminate was removed from the stainless steel round bar to obtain a spiral tubular heater having a length of 10 cm. The resistance value of this spiral tubular heater was 200Ω. Further, when this spiral tubular heater was mounted on a stainless steel pipe having a diameter of 10 mm and a voltage of 50 V was applied to both ends, the temperature of the stainless steel pipe was 100 ° C., and the temperature was uniformly maintained.
[0027]
【The invention's effect】
The spiral tubular heater of the present invention can be easily and easily applied to a heated body without being limited by the size of the heated body, even if both ends are connected to an apparatus or the like and have little flexibility. It can be mounted quickly and evenly, with good adhesion to the object to be heated, good thermal efficiency, accurate temperature control, and the resistance value of the heater can be freely changed.
Moreover, according to the manufacturing method of the present invention, the spiral tubular heater of the present invention having an arbitrary inner diameter and good shape retention and heat resistance can be obtained.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an example of a spiral tubular heater of the present invention.
FIG. 2 is a partial cross-sectional view of the spiral tubular heater shown in FIG. 1 cut in parallel to the spiral core.
FIG. 3 is a partial perspective view showing a tape-like heating element used in the spiral tubular heater shown in FIG. 1;
FIG. 4 is a partial perspective view showing another example of a tape-like heating element used for a spiral tubular heater.
FIG. 5 is a perspective view showing a state in which the spiral tubular heater of the present invention is extended in the longitudinal direction.
FIG. 6 is a partial perspective view showing an example of use of the spiral tubular heater of the present invention.
[Explanation of symbols]
1 Spiral tubular heater 2 Inner layer (heat-resistant polymer tape A)
3 Outer layer (heat-resistant polymer tape B)
4 Adhesive Layer 5 Tape Heating Element 51 Heater Wire 52 Heat Resistant Fiber C Heat Resistant Polymer Tape C
10 Object to be heated

Claims (6)

An inner layer formed by spirally winding the heat-resistant polymer tape A, an outer layer formed by spirally winding the heat-resistant polymer tape B on the inner layer, and the inner layer and the A tape-shaped heating element wound in a spiral shape is provided between the inner layer and the outer layer of the spiral tubular laminate composed of an adhesive layer that adheres the outer layer, and the tape-shaped heating element A heat-resistant polymer tape C in which a heater wire or a conductive foil is wound in a spiral shape, and the heat-resistant polymer tapes A, B, and C are aromatic polyimide tapes, respectively . Spiral tubular heater. An inner layer formed by spirally winding the heat-resistant polymer tape A, an outer layer formed by spirally winding the heat-resistant polymer tape B on the inner layer, and the inner layer and the A tape-shaped heating element wound in a spiral shape is provided between the inner layer and the outer layer of the spiral tubular laminate composed of an adhesive layer that adheres the outer layer, and the tape-shaped heating element A shape-retaining spiral tubular heater , characterized in that the heater wire is a braid braided with heat-resistant fibers. The heat-resistant polymer tape A, B and C, according to claim 1 Symbol placement shape retention of the spiral tubular heater is the thickness, respectively 15 to 200 m. The shape-retaining spiral tubular heater according to claim 2 , wherein the heat-resistant fiber is a polyimide fiber or a glass fiber. The shape-retaining spiral tubular heater according to claim 1 or 2 , wherein the adhesive layer is a thermosetting adhesive layer. A long shape-giving member having the same outer shape as the object to be heated is wound in a spiral shape with a heat-resistant polymer tape A provided with an adhesive layer on one side, with the adhesive layer facing outside, to form an inner layer, A tape-like heating element is wound spirally on the inner layer, and a heat-resistant polymer tape B provided with an adhesive layer on one side is wound spirally with the adhesive layer on the outer layer. And the adhesive layer is cured and laminated and integrated, and the formed spiral tubular laminate is removed from the shape imparting member to obtain the shape-retaining spiral tubular heater according to claim 1 or 2. A method for manufacturing a spiral tubular heater.

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