WO2001023659A1 - Method for manufacturing heating pad using electrically conducting polymer suitable for use in maintaining patients' body temperature - Google Patents

Method for manufacturing heating pad using electrically conducting polymer suitable for use in maintaining patients' body temperature Download PDF

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Publication number
WO2001023659A1
WO2001023659A1 PCT/KR2000/001070 KR0001070W WO0123659A1 WO 2001023659 A1 WO2001023659 A1 WO 2001023659A1 KR 0001070 W KR0001070 W KR 0001070W WO 0123659 A1 WO0123659 A1 WO 0123659A1
Authority
WO
WIPO (PCT)
Prior art keywords
cloth
heating pad
electrically conducting
conducting polymer
patients
Prior art date
Application number
PCT/KR2000/001070
Other languages
French (fr)
Inventor
Jeong Ok Lim
Dong Won Park
Original Assignee
Huh, Jeung, Soo
Baek, Woon, Yi
Kim, Jin, Do
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Huh, Jeung, Soo, Baek, Woon, Yi, Kim, Jin, Do filed Critical Huh, Jeung, Soo
Priority to JP2001527033A priority Critical patent/JP3660304B2/en
Priority to AU76882/00A priority patent/AU7688200A/en
Publication of WO2001023659A1 publication Critical patent/WO2001023659A1/en

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Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/20—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater
    • H05B3/34—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater flexible, e.g. heating nets or webs
    • H05B3/342—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater flexible, e.g. heating nets or webs heaters used in textiles
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
    • D06M11/83—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with metals; with metal-generating compounds, e.g. metal carbonyls; Reduction of metal compounds on textiles
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
    • D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
    • D06M15/37—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • D06M15/61—Polyamines polyimines
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
    • D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
    • D06M15/37—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • D06M15/63—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds containing sulfur in the main chain, e.g. polysulfones
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M23/00—Treatment of fibres, threads, yarns, fabrics or fibrous goods made from such materials, characterised by the process
    • D06M23/16—Processes for the non-uniform application of treating agents, e.g. one-sided treatment; Differential treatment
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
    • H01B1/06—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of other non-metallic substances
    • H01B1/12—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of other non-metallic substances organic substances
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M2200/00—Functionality of the treatment composition and/or properties imparted to the textile material
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
    • H05B2203/013—Heaters using resistive films or coatings
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
    • H05B2203/017—Manufacturing methods or apparatus for heaters
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
    • H05B2203/036—Heaters specially adapted for garment heating

Definitions

  • the present invention relates to a method for manufacturing a heating pad suitable for use in maintaining patients' body temperatures More particularly, the present invention relates to the coating of an electrically conducting material, such as polypyrrole, polyaniline, or polythiophene, on a cloth in a chemical and an electrical polymerization process, so as to manufacture a heating pad which can safely maintain its temperature at at least at 40+5°C for 1-4 hours
  • a hypothermic control system or a warming air inflation blanket is typically employed for use in maintaining the body temperature of the patients who have just undergone operations.
  • a hypothermic control system in which warm water is circulated through a rubber mattress, is limitedly used.
  • the warming air inflation blanket its function of warming patients is performed with warm air which is injected between double-sided covers
  • this blanket causes an environmental problem because it is disposable. Further, it is unpleasant to the touch because it is made of vinyl and non-woven fabrics.
  • the blanket is inconvenient to cover patients with
  • an electric blanket which is extensively used for maintaining warmth, is prohibited from being used in hospitals because the electromagnetic waves generated during its operation may harm the patient and interfere with the operations of precision instruments in operating rooms, directly and indirectly.
  • the patient might receive an electric shock from the blanket because of the presence of water, such as physiological saline and blood, near the patient Moreover, the patient may catch fire if the controller of the electric blanket is out of the order.
  • the above object could be accomplished by a provision of a method for manufacturing a heating pad using an electrically conducing polymer suitable for use in maintaining patients' body temperatures, comprising: a chemical polymerization process in which a cloth is treated with a solution containing dopants, distilled polymerizable monomers and an oxidizer at a high temperature under a high pressure to coat an electrically conducting polymer membrane onto the cloth, said cloth being composed of synthetic fibers such as nylon or polyester, or a combination of synthetic fibers and natural fibers, an electrical polymerization process in which the cloth is washed with water to detach weakly bonded polymeric materials therefrom and covered with a magnetic patterning sheet such that a polymeric coating is allowed to grow thicker on the exposed areas of the cloth, and an instrumenting process in which a temperature sensor and controller and a portable power supply are provided to the cloth
  • Fig 1 is a schematic view illustrating a high temperature and pressure system for use in the chemical polymerization of electrically conducting monomers in accordance with an embodiment of the present invention
  • Fig 2 is a schematic view illustrating a polymerization bath system for use in the electrical polymerization process in accordance with another embodiment of the present invention
  • Fig 3 is a side view showing a magnetic patterning sheet in accordance with a further embodiment of the present invention.
  • Fig 4 is a schematic view illustrating a heating pad equipped with a temperature sensor and controller and a power supply
  • Fig 5 shows a temperature profile and a current profile of the heating pad, both of which are plotted with regard to time
  • Fig 6 shows various applications of the heating pad
  • the present invention is essentially composed of a chemical polymerization process for coating an electrically conducting polymer membrane on a gray cloth and an electrical polymerization process for growing a polymer membrane with the aid of a magnetic patterning sheet
  • the electrically conducting polymer membrane is formed at about 50-150 °C under a pressure of 1-3 kgf/cm 2 by immersing a gray cloth in a bath containing dopants, polyme ⁇ zable monomers, and an oxidizer Suitable as the gray cloth is a synthetic fiber, such as a nylon fiber or a polyester fiber In this process, an electrical current is passed through the cloth, so that it is used as an electrode in the electrical polymerization process
  • the electrical polymerization process is conducted by applying the electrode with a current density of 1-9 mA/cm" while N 2 gas is bubbled for stirring in a polymerization bath
  • a pattern of a polymeric coating is formed on the cloth
  • the cloth is covered with the magnetic patterning sheet such that a polymer is allow to grow thicker on the exposed areas of the cloth
  • Suitable for use as the polymeric material in the present invention are polypyrrole, polyaniline and polythiophene, all of which are electrically conductive
  • One or more of these electrically conductive polymers are coated by using a chemical and an electrical polymerization process in combination
  • a portable battery can be equipped on the heating pad to heat the heating pad to 40-45 °C
  • a temperature sensor and controller is provided for controlling the temperature of the heating pad at below 45 °C because the skin is burned if it is exposed to higher 45 °C for 1 hour or longer
  • the heating pad can be used safely
  • FIG 1 there is a high-temperature, high-pressure system 3 in which chemical polymerization is conducted in accordance with an embodiment of the present invention
  • a cloth 1 which is used as a substrate for the heating pad of the present invention, is repeatedly through a bath 2 containing dopants, distilled polymerizable monomers and an oxidizer while a chemical polymerization reaction occurs in the bath 2
  • the bath 2 is heated by a heater 4
  • the system 3 is maintained at about 50-150 °C under a pressure of 1-3 kgf/cm 2 for 3-100 min
  • the reason why such high temperature and pressure conditions are adopted is that, as in a dyeing process, the electrically conducting polymers obtained are forced to more actively impregnate into the cloth fibers under the high temperature and pressure conditions than under ordinary temperature and pressure conditions.
  • the cloth 1 is washed with water to detach the polymers which are weakly associated with the cloth 1 Afterward, the cloth is dried at room temperature or in an oven to give an electrically conducting polymer-impregnated cloth 1 '
  • a polymerization bath system for electrical polymerization according to another embodiment of the present invention
  • the cloth 1 ' which is obtained in Example 1
  • the working electrode is applied with a current density of 1-9 mA/cm 2 while the bath is bubbled from its bottom with N gas for stirring
  • the cloth is subjected to patterning with the aid of a magnet to increase the amount of electrically conducting polymeric materials which are coated onto the cloth and to improve the quality of the coating
  • the rotating speed of rollers 5 may be adjusted Because the ions present in the polymerization bath are positively charged, when an N pole, which is cathode, faces to an opposing electrode 7, the cations in the polymerization bath are attracted toward the working electrode under the influence of the magnetic field formed, such that the cations coat onto the cloth which closely contacts the working electrode As a result, the cloth is found to be improved in surface morphology as observed with a microscope In
  • a patterning sheet 6 in a side view, with which a pattern is formed on the cloth upon the electrical polymerization, in accordance with another embodiment of the present invention
  • the patterning is for the purpose of providing the cloth with flexibility
  • a magnetic patterning sheet like that shown in Fig 3 is covered over the cloth so that a polymeric coating is allowed to grow thicker on the exposed areas of the cloth
  • the rollers are quickly rotated whenever the cloth passes through patterning parts 9 Once the passing of the cloth is completed, electrical polymerization is achieved, giving a pattern after the patterning sheet 6 Because a larger number of cations of the polymerization bath are attracted toward the N poles which are negatively charged, a larger amount of electrically conducting polymer materials are coated on the areas near the N poles
  • a heating pad 13 equipped with a temperature sensor, a temperature controller and a power supply 8, which is manufactured in accordance with the present invention
  • the cloth is found to range in resistance from approximately 10° to 10 2 K ⁇ /I
  • FIG 5 there is a temperature profile of a heating pad manufactured in accordance with the present invention, which is plotted with regard to a period of time, along with a current profile provided to the heating pad
  • a 12 V lithium ion battery was mounted on the heating pad which was then tested for heating
  • the heating pad is heated to above 40 °C shortly after the supply of power from the battery and is maintained at more than 40 °C for 8 hours or longer
  • a heating pad can be manufactured by coating a cloth with an electrically conducting polymeric material which generates no generating electromagnetic wavelengths harmful to the body in a combination of a chemical and an electrical polymerization process
  • a portable power supply is provided for generating heat and a temperature sensor and controller for controlling the temperature

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Thermotherapy And Cooling Therapy Devices (AREA)
  • Resistance Heating (AREA)

Abstract

Disclosed is a method for manufacturing a heating pad using an electrically conducting polymer suitable for use in maintaining patient' body temperatures. A cloth made of a synthetic fiber or a natural fiber is treated in a bath containing dopants, distilled polymerizable monomers, and an oxidizer under such a high temperature and pressure that an electrically conducting polymer is chemically formed on the cloth. After being washed, the cloth is covered with a patterning sheet such that electrical polymerization is conducted to grow a polymeric coating according to the pattern of the patterning sheet. The heating pad has a resistance of 10-2-102 Φ/ <. To the heating pad, a temperature sensor and controller is provided for safely maintaining patient' body temperatures.

Description

METHOD FOR MANUFACTURING HEATING PAD USING
ELECTRICALLY CONDUCTING POLYMER SUITABLE FOR USE IN
MAINTAINING PATIENTS' BODY TEMPERATURE
TECHNICAL FIELD
The present invention relates to a method for manufacturing a heating pad suitable for use in maintaining patients' body temperatures More particularly, the present invention relates to the coating of an electrically conducting material, such as polypyrrole, polyaniline, or polythiophene, on a cloth in a chemical and an electrical polymerization process, so as to manufacture a heating pad which can safely maintain its temperature at at least at 40+5°C for 1-4 hours
PRIOR ART
Since most of the hospital buildings that have recently been constructed or remodeled adopt centrally controlled heating and cooling systems, it is virtually impossible to regulate ward temperatures to accommodate every patient who is admitted to the hospitals Thus, patients, who usually live in thin gowns for a long period of time in hospitals, are required to control and manage their own individual body temperatures In particular, the patients who have just undergone surgical operations have difficulty in controlling their own body temperatures because of the stress and bleeding resulting from the operations and the exposure of internal organs to the outside for a long period of time In fact, since the interior temperatures of hospitals are usually maintained at 22-24 °C all the year round, the patients on whom operations have just been performed cannot recover their normal body temperature immediately so that they may suffer from shivering and hypoxia
To prevent such problems which lead the patients to suffer serious consequences, a hypothermic control system or a warming air inflation blanket is typically employed for use in maintaining the body temperature of the patients who have just undergone operations. Associated with a main body as large as an average washing machine, a hypothermic control system, in which warm water is circulated through a rubber mattress, is limitedly used. In addition, it is very expensive As for the warming air inflation blanket, its function of warming patients is performed with warm air which is injected between double-sided covers In addition to being expensive, this blanket, however, causes an environmental problem because it is disposable. Further, it is unpleasant to the touch because it is made of vinyl and non-woven fabrics. Swelling as warm air is injected, the blanket is inconvenient to cover patients with Meanwhile, an electric blanket, which is extensively used for maintaining warmth, is prohibited from being used in hospitals because the electromagnetic waves generated during its operation may harm the patient and interfere with the operations of precision instruments in operating rooms, directly and indirectly. Furthermore, there is always the danger that the patient might receive an electric shock from the blanket because of the presence of water, such as physiological saline and blood, near the patient Moreover, the patient may catch fire if the controller of the electric blanket is out of the order.
DISCLOSURE OF THE INVENTION
It is an object of the present invention to overcome the above problems encountered in prior arts and to provide a method for manufacturing a heating pad which can safely generate heat by taking advantage of the heating properties of an electrically conducting polymer.
Based on the present invention, the above object could be accomplished by a provision of a method for manufacturing a heating pad using an electrically conducing polymer suitable for use in maintaining patients' body temperatures, comprising: a chemical polymerization process in which a cloth is treated with a solution containing dopants, distilled polymerizable monomers and an oxidizer at a high temperature under a high pressure to coat an electrically conducting polymer membrane onto the cloth, said cloth being composed of synthetic fibers such as nylon or polyester, or a combination of synthetic fibers and natural fibers, an electrical polymerization process in which the cloth is washed with water to detach weakly bonded polymeric materials therefrom and covered with a magnetic patterning sheet such that a polymeric coating is allowed to grow thicker on the exposed areas of the cloth, and an instrumenting process in which a temperature sensor and controller and a portable power supply are provided to the cloth
BRIEF DESCRIPTION OF THE DRAWINGS
The above and other objects, features and other advantages of the present invention will be more clearly understood from the following detailed description taken m conjunction with the accompanying drawings, in which
Fig 1 is a schematic view illustrating a high temperature and pressure system for use in the chemical polymerization of electrically conducting monomers in accordance with an embodiment of the present invention,
Fig 2 is a schematic view illustrating a polymerization bath system for use in the electrical polymerization process in accordance with another embodiment of the present invention,
Fig 3 is a side view showing a magnetic patterning sheet in accordance with a further embodiment of the present invention,
Fig 4 is a schematic view illustrating a heating pad equipped with a temperature sensor and controller and a power supply,
Fig 5 shows a temperature profile and a current profile of the heating pad, both of which are plotted with regard to time; and
Fig 6 shows various applications of the heating pad
BEST MODES FOR CARRYING OUT THE INVENTION
The present invention is essentially composed of a chemical polymerization process for coating an electrically conducting polymer membrane on a gray cloth and an electrical polymerization process for growing a polymer membrane with the aid of a magnetic patterning sheet
In the chemical polymerization process, the electrically conducting polymer membrane is formed at about 50-150 °C under a pressure of 1-3 kgf/cm2 by immersing a gray cloth in a bath containing dopants, polymeπzable monomers, and an oxidizer Suitable as the gray cloth is a synthetic fiber, such as a nylon fiber or a polyester fiber In this process, an electrical current is passed through the cloth, so that it is used as an electrode in the electrical polymerization process
The electrical polymerization process is conducted by applying the electrode with a current density of 1-9 mA/cm" while N2 gas is bubbled for stirring in a polymerization bath
In order to provide the cloth with flexibility and an efficient heating structure, a pattern of a polymeric coating is formed on the cloth In this regard, the cloth is covered with the magnetic patterning sheet such that a polymer is allow to grow thicker on the exposed areas of the cloth Suitable for use as the polymeric material in the present invention are polypyrrole, polyaniline and polythiophene, all of which are electrically conductive One or more of these electrically conductive polymers are coated by using a chemical and an electrical polymerization process in combination A portable battery can be equipped on the heating pad to heat the heating pad to 40-45 °C Also, a temperature sensor and controller is provided for controlling the temperature of the heating pad at below 45 °C because the skin is burned if it is exposed to higher 45 °C for 1 hour or longer Thus, the heating pad can be used safely
A better understanding of the present invention may be obtained in light of the following examples which are illustrated with referent to the accompanying drawings and set forth to illustrate, but are not to be construed to limit the present invention
EXAMPLE 1 With reference to Fig 1, there is a high-temperature, high-pressure system 3 in which chemical polymerization is conducted in accordance with an embodiment of the present invention As illustrated in Fig 1, a cloth 1, which is used as a substrate for the heating pad of the present invention, is repeatedly through a bath 2 containing dopants, distilled polymerizable monomers and an oxidizer while a chemical polymerization reaction occurs in the bath 2 To facilitate the chemical polymerization, the bath 2 is heated by a heater 4 During the chemical polymerization, the system 3 is maintained at about 50-150 °C under a pressure of 1-3 kgf/cm2 for 3-100 min The reason why such high temperature and pressure conditions are adopted is that, as in a dyeing process, the electrically conducting polymers obtained are forced to more actively impregnate into the cloth fibers under the high temperature and pressure conditions than under ordinary temperature and pressure conditions. Most of the polymers formed by the chemical polymerization stick to the cloth fibers via physical forces After completion of the chemical polymerization, the cloth 1 is washed with water to detach the polymers which are weakly associated with the cloth 1 Afterward, the cloth is dried at room temperature or in an oven to give an electrically conducting polymer-impregnated cloth 1 '
EXAMPLE 2
With reference to Fig. 2, a polymerization bath system is provided for electrical polymerization according to another embodiment of the present invention In the polymerization bath system, the cloth 1 ', which is obtained in Example 1, is allowed to undergo electrical polymerization In this regard, the working electrode is applied with a current density of 1-9 mA/cm2 while the bath is bubbled from its bottom with N gas for stirring The cloth is subjected to patterning with the aid of a magnet to increase the amount of electrically conducting polymeric materials which are coated onto the cloth and to improve the quality of the coating To achieve a preferred patterning result, the rotating speed of rollers 5 may be adjusted Because the ions present in the polymerization bath are positively charged, when an N pole, which is cathode, faces to an opposing electrode 7, the cations in the polymerization bath are attracted toward the working electrode under the influence of the magnetic field formed, such that the cations coat onto the cloth which closely contacts the working electrode As a result, the cloth is found to be improved in surface morphology as observed with a microscope In addition, the cloth 1 ' is has a surface resistance of approximately 10 Ω/_. which is lower than that of the cloth which is obtained by electrical polymerization using a patterning sheet
EXAMPLE 3
Referring to Fig. 3, there is shown a patterning sheet 6 in a side view, with which a pattern is formed on the cloth upon the electrical polymerization, in accordance with another embodiment of the present invention The patterning is for the purpose of providing the cloth with flexibility In this connection, a magnetic patterning sheet like that shown in Fig 3 is covered over the cloth so that a polymeric coating is allowed to grow thicker on the exposed areas of the cloth
Thus, the rollers are quickly rotated whenever the cloth passes through patterning parts 9 Once the passing of the cloth is completed, electrical polymerization is achieved, giving a pattern after the patterning sheet 6 Because a larger number of cations of the polymerization bath are attracted toward the N poles which are negatively charged, a larger amount of electrically conducting polymer materials are coated on the areas near the N poles
EXAMPLE 4
With reference to Fig 4, there is a heating pad 13 equipped with a temperature sensor, a temperature controller and a power supply 8, which is manufactured in accordance with the present invention When prepared only through chemical polymerization, the cloth is found to range in resistance from approximately 10° to 102 KΩ/I However, the coated areas of the cloth which are patterned with the aid of the patterning sheet are measured to have a resistance of approximately 10"2 to 102 Ω/_j Therefore, electrical paths on the heating pad are formed along the trace of the patterned parts 10 which are used for the electrical polymerization Complying with the Joule heating, the calorific power of the heating pad is represented by the following formula Q = 0 24 I2 Rt (cal)
Depending on the materials, the temperature of the heating pad increases according to the following formula Q=Cmm ΔT wherein Cm represents heat capacity and m represents a mass
EXAMPLE 5
With reference to Fig 5, there is a temperature profile of a heating pad manufactured in accordance with the present invention, which is plotted with regard to a period of time, along with a current profile provided to the heating pad To obtain the temperature profile, a 12 V lithium ion battery was mounted on the heating pad which was then tested for heating As shown in the temperature profile, the heating pad is heated to above 40 °C shortly after the supply of power from the battery and is maintained at more than 40 °C for 8 hours or longer
INDUSTRIAL APPLICABILITY
As described hereinbefore, a heating pad can be manufactured by coating a cloth with an electrically conducting polymeric material which generates no generating electromagnetic wavelengths harmful to the body in a combination of a chemical and an electrical polymerization process To the heating pad, a portable power supply is provided for generating heat and a temperature sensor and controller for controlling the temperature
Although the heating pad of the present invention has been descried for use in maintaining patients' body temperatures, it will be understood that the teachings herein can be applied to various products as well, including grooves, dresses, shoes, tents, etc , as shown in Fig 6 While the foregoing examples illustrate and describe the use of the present invention, they are not intended to limit the present invention as disclosed in certain preferred embodiments herein Therefore, variations and modifications commensurate with the above teachings and the skill and/or knowledge of the relevant are, are within the scope of the present invention

Claims

CLAIM
1 A method for manufacturing a heating pad using an electrically conducting polymer suitable for use in maintaining patients' body temperatures, comprising a chemical polymerization process in which a cloth is treated with a solution containing dopants, distilled polymerizable monomers and an oxidizer at a high temperature under a high pressure to coat an electrically conducting polymer membrane onto the cloth, said cloth being composed of synthetic fibers such as nylon or polyester, or a combination of synthetic fibers and natural fibers, an electrical polymerization process in which the cloth is washed with water to detach weakly bonded polymeric materials therefrom and covered with a magnetic patterning sheet such that a polymeric coating is allowed to grow thicker on the exposed areas of the cloth, and an instrumenting process in which a temperature sensor and controller and a portable power supply are provided to the cloth
PCT/KR2000/001070 1999-09-30 2000-09-26 Method for manufacturing heating pad using electrically conducting polymer suitable for use in maintaining patients' body temperature WO2001023659A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2001527033A JP3660304B2 (en) 1999-09-30 2000-09-26 Manufacturing method of heating cloth for maintaining body temperature of patient using electroconductive polymer substance
AU76882/00A AU7688200A (en) 1999-09-30 2000-09-26 Method for manufacturing heating pad using electrically conducting polymer suitable for use in maintaining patients' body temperature

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1999/41954 1999-09-30
KR1019990041954A KR20010029238A (en) 1999-09-30 1999-09-30 Manufacturing for heating pad for maintaining patient's body temperature by electrically conducting polymers

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KR (2) KR20010029238A (en)
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WO (1) WO2001023659A1 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003107721A1 (en) * 2002-06-01 2003-12-24 Http-Hypothermia Therapy Ltd. Electrical heating device, particularly for heating a patient body
US6891136B2 (en) 2002-06-18 2005-05-10 Http-Hypothermia Therapy Ltd. Electrical heating device
US7709770B2 (en) 2000-03-31 2010-05-04 HTTP—Hypothermia Therapy Ltd. Heating device for heating a patient's body
WO2012001465A1 (en) * 2010-06-29 2012-01-05 Indian Institute Of Technology Kanpur Flexible temperature sensor and sensor array
CN104131467A (en) * 2014-07-09 2014-11-05 常熟市翔鹰特纤有限公司 Preparation method of acrylic fiber conductive filament
CZ308243B6 (en) * 2018-10-10 2020-03-18 Centrum organické chemie s.r.o. Method of detecting adherence to a prescribed chemical cleaning regime of functionalized protective fabrics with a final treatment stable in chemical cleaning and non-stable in laundering finishes, identification element and system for carrying out the method

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016182306A (en) * 2015-03-26 2016-10-20 大阪瓦斯株式会社 Hand and foot temperature adjusting device

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4527566A (en) * 1980-12-17 1985-07-09 Abare Enterprises, Inc. Body wrap
US4788417A (en) * 1985-05-07 1988-11-29 Kanthal Medical Heating Ab Electrical heating pad
KR20000059546A (en) * 1999-03-05 2000-10-05 임정옥 Manufacturing for heating pad for maintaining patient's body temperature by electrically conducting polymers

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4149066A (en) * 1975-11-20 1979-04-10 Akitoshi Niibe Temperature controlled flexible electric heating panel
JPH01299509A (en) * 1988-05-26 1989-12-04 Matsushita Electric Ind Co Ltd Electric heating blanket
JPH06134018A (en) * 1992-10-27 1994-05-17 Fujimori Kogyo Kk Conductive heating pad

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4527566A (en) * 1980-12-17 1985-07-09 Abare Enterprises, Inc. Body wrap
US4788417A (en) * 1985-05-07 1988-11-29 Kanthal Medical Heating Ab Electrical heating pad
KR20000059546A (en) * 1999-03-05 2000-10-05 임정옥 Manufacturing for heating pad for maintaining patient's body temperature by electrically conducting polymers

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7709770B2 (en) 2000-03-31 2010-05-04 HTTP—Hypothermia Therapy Ltd. Heating device for heating a patient's body
WO2003107721A1 (en) * 2002-06-01 2003-12-24 Http-Hypothermia Therapy Ltd. Electrical heating device, particularly for heating a patient body
US6891136B2 (en) 2002-06-18 2005-05-10 Http-Hypothermia Therapy Ltd. Electrical heating device
US7329843B2 (en) 2002-06-18 2008-02-12 Http-Hypothermia Therapy Ltd. Electrical heating device particularly for heating a patient body
WO2012001465A1 (en) * 2010-06-29 2012-01-05 Indian Institute Of Technology Kanpur Flexible temperature sensor and sensor array
US20120263209A1 (en) * 2010-06-29 2012-10-18 Indian Institute Of Technology Kanpur Flexible temperature sensor and sensor array
US8783948B2 (en) * 2010-06-29 2014-07-22 Indian Institute Of Technology Kanpur Flexible temperature sensor and sensor array
CN104131467A (en) * 2014-07-09 2014-11-05 常熟市翔鹰特纤有限公司 Preparation method of acrylic fiber conductive filament
CZ308243B6 (en) * 2018-10-10 2020-03-18 Centrum organické chemie s.r.o. Method of detecting adherence to a prescribed chemical cleaning regime of functionalized protective fabrics with a final treatment stable in chemical cleaning and non-stable in laundering finishes, identification element and system for carrying out the method

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KR20010029238A (en) 2001-04-06

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