KR100198233B1 - Self control heating material - Google Patents
Self control heating material Download PDFInfo
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- KR100198233B1 KR100198233B1 KR1019940036559A KR19940036559A KR100198233B1 KR 100198233 B1 KR100198233 B1 KR 100198233B1 KR 1019940036559 A KR1019940036559 A KR 1019940036559A KR 19940036559 A KR19940036559 A KR 19940036559A KR 100198233 B1 KR100198233 B1 KR 100198233B1
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- element composition
- carbon black
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- 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
- H05B3/10—Heater elements characterised by the composition or nature of the materials or by the arrangement of the conductor
- H05B3/12—Heater elements characterised by the composition or nature of the materials or by the arrangement of the conductor characterised by the composition or nature of the conductive material
Abstract
본 발명은 열가소성 폴리우레탄 수지에 카본블랙(Carbon black)및/또는 그라파이트(Graphite) 도전성 분체를 첨가하여 자기온도 제어성을 갖도록 한 발열체 조성물에 관한 것으로, 100 중량부의 열가소성 폴리우레탄 수지에 10∼40 중량부의 카본블랙과 5∼20 중량부의 그라파이트(Graphite) 도전성 분체를 단독 또는 혼용하여 혼합하고 전자선 조사 가교조제, 산화방지제 및 충진제를 혼합처리하여 고온에서도 사용이 가능하며 발열체 조성물의 고유특성인 자기온도 제어성은 물론 장기 과전 안정성이 우수하다.The present invention relates to a heating element composition in which carbon black and / or graphite conductive powder is added to a thermoplastic polyurethane resin so as to have self-temperature controllability, and 10 to 40 parts by weight of a thermoplastic polyurethane resin. It can be used at high temperatures by mixing carbon parts by weight and 5 to 20 parts by weight of graphite conductive powder alone or in combination, and by mixing and treating electron beam irradiation crosslinking aids, antioxidants and fillers. It has excellent controllability and long-term overload stability.
Description
본 발명은 열가소성 폴리우레탄 수지에 카본블랙(Carbon black)및/또는 그라파이트(Graphite) 도전성 분체를 첨가하여 자기온도 제어성을 갖도록 한 발열체 조성물에 관한 것이다.The present invention relates to a heating element composition having carbon black and / or graphite conductive powder added to a thermoplastic polyurethane resin to have self-temperature controllability.
종래 자기온도 제어성을 갖는 발열체 조성물로는 폴리에틸렌, 에틸렌 초산비닐 공중합체등의 폴리머 베이스에 카본블랙과 그라파이트를 첨가하여 사용하였으나 폴리올레핀계 수지나 에틸렌 초산비닐 공중합체 등을 사용한 발열체 조성물은 약 100℃ 이상에서는 사용이 거의 불가능하며, 이것을 사용한 경우 임계점 이상의 고온에서 저항이 저하하고, 스위칭 기능의 폭주시 발열체 조성물의 저항이 급격하게 커져서 절연체화되어 발열체로서의 기능을 상실하게 된다.Conventionally, as a heating element composition having self-temperature controllability, carbon black and graphite are added to a polymer base such as polyethylene and ethylene vinyl acetate copolymer, but the heating element composition using polyolefin resin or ethylene vinyl acetate copolymer is about 100 ° C. In the above, it is almost impossible to use, and when this is used, the resistance decreases at a high temperature above the critical point, and when the congestion of the switching function is performed, the resistance of the heating element composition rapidly increases, insulates and loses its function as a heating element.
또한 폴리올레핀계 수지 및 에틸렌 초산비닐 공중합체등의 폴리머 베이스에 도전성 분체인 카본블랙을 첨가시 첨가되는 카본블랙의 양이 많을수록 강성(强性)이 강해져 발열체가 경질화되어짐으로 인해 깨어지거나 유연성(柔軟性)이 저하되어 구부렸을때 발열체에 균열이 생기는 등의 문제가 있다.In addition, the more carbon black added when the conductive powder carbon black is added to a polymer base such as polyolefin resin and ethylene vinyl acetate copolymer, the more rigid it becomes and the cracked or flexible due to the hardening of the heating element. There is a problem such as cracking of the heating element when bending due to deterioration.
또한, 발열체 조성물로 폴리올레핀계 수지에 공중합체를 혼합하여 사용하면 고온에서 발열체가 절연체화되어 온도가 내려가도 조성물이 본래의 전기적 특성을 회복하지 못하여 발열체 조성물 고유특성인 자기온도 제어성은 물론 양호한 장기 과전안정성을 얻기가 어렵다.In addition, when a copolymer is mixed with a polyolefin resin as a heating element composition, the heating element is insulated at a high temperature, and even though the temperature decreases, the composition does not recover its original electrical characteristics, so that the self-temperature control characteristic, which is inherent to the heating element composition, is also good for long-term overload. It is difficult to obtain stability.
따라서, 본 발명은 100℃ 이상의 고온에서도 사용이 가능하며 카본블랙 도전성 분체를 다량첨가하여도 유연성이 향상되어 발열체의 균열이 없고, 장기 과전안정성이 우수한 자기온도 제어성을 갖는 발열체 조성물을 제공하는데 그 목적이 있다.Accordingly, the present invention can be used even at a high temperature of 100 ℃ or more, and even if a large amount of carbon black conductive powder is improved, there is no cracking of the heating element, there is provided a heating element composition having self temperature controllability excellent in long-term over-stability There is a purpose.
상기 목적을 달성하기 위한 본 발명은 종래 폴리올레핀계 수지나 에틸렌 초산비닐 공중합체 수지 대신에 열가소성이 우수한 폴리올레핀계 수지의 베이스에 도전성 카본블랙 및/또는 그라파이트를 일정량 첨가한 발열체 조성물로 이루어짐을 특징으로 한다.The present invention for achieving the above object is characterized by consisting of a heating element composition in which a predetermined amount of conductive carbon black and / or graphite is added to the base of a polyolefin resin having excellent thermoplasticity in place of the conventional polyolefin resin or ethylene vinyl acetate copolymer resin. .
이하 표 1을 참조하여 종래 폴리올레핀계 수지나 에틸렌 초산비닐 공중합체를 이용한 비교예의 조성물 및 그 비율과 대비하여 본 발명의 양호한 실시예에 대해 설명한다.Hereinafter, with reference to Table 1, a preferred embodiment of the present invention will be described in comparison with the composition and the proportion of the comparative example using a conventional polyolefin resin or ethylene vinyl acetate copolymer.
[실시예 1]Example 1
본 발명은 폴리올레핀계 수지나 에틸렌 초산비닐 공중합체 대신에 열가소성이 우수한 100중량부의 폴리우레탄 폴리머 베이스에 40중량부의 카본블랙(상품명 : 볼컨) 도전성 분체를 혼합하고, 조성물의 제반특성을 부여하기 위한 0.5중량부의 산화방지제, 10중량부의 충진제 및 5중량부의 전자선조사 가교조제를 첨가하여 발열체 조성물을 제조하였다.The present invention is a mixture of 40 parts by weight of carbon black (trade name: Volcan) conductive powder to 100 parts by weight of a polyurethane polymer base having excellent thermoplasticity, instead of polyolefin resin or ethylene vinyl acetate copolymer, and 0.5 for imparting various properties of the composition. A heating element composition was prepared by adding a part by weight of antioxidant, 10 parts by weight of filler, and 5 parts by weight of electron beam irradiation crosslinking aid.
[실시예 2]Example 2
100중량부의 열가소성 폴리우레탄 폴리머 베이스에 20중량부의 카본블랙(상품명 : 볼컨) 도전성 분체와 5중량부의 그라파이트를 혼합하였다.20 parts by weight of carbon black (trade name: Volcan) conductive powder and 5 parts by weight of graphite were mixed with 100 parts by weight of a thermoplastic polyurethane polymer base.
이외에 실시예 1에서의 산화방지제, 충진제 및 2중량부의 전자선조사 가교조제를 첨가하여 발열체 조성물을 제조하였다.In addition, an antioxidant, a filler, and 2 parts by weight of the electron beam irradiation crosslinking aid in Example 1 were added to prepare a heating element composition.
[실시예 3]Example 3
100중량부의 열가소성 폴리우레탄 폴리머 베이스에 10중량부의 카본블랙(상품명 : 케천) 도전성 분체와 5중량부의 그라파이트를 혼합하고, 이외에는 실시예 2에서의 기타 배합제를 첨가하여 발열체 조성물을 제조하였다.10 parts by weight of carbon black (trade name: Ketchen) conductive powder and 5 parts by weight of graphite were mixed with 100 parts by weight of a thermoplastic polyurethane polymer base, and other compounding agents in Example 2 were added to prepare a heating element composition.
[실시예 4]Example 4
100중량부의 열가소성 폴리우레탄 폴리머 베이스에 그라파이트 20중량부를 혼합하고, 이외에는 실시예 1에서의 기타 배합제를 첨가하여 발열체 조성물을 제조하였다.20 parts by weight of graphite was mixed with 100 parts by weight of a thermoplastic polyurethane polymer base, and other compounding agents in Example 1 were added to prepare a heating element composition.
한편, 비교예에서는 폴리올레핀계인 종래 폴리에틸렌 수지를 베이스로 사용한 경우(비교예 1,2), 폴리에틸렌 수지와 에틸렌 초산비닐 공중합체를 일정비율로 혼합하여 베이스로 사용한 경우(비교예 3), 그리고 에틸렌 초산비닐 공중합체를 베이스로 사용하여 (비교예 4), 발열체 조성물을 제조하였다.On the other hand, in the comparative example, when a conventional polyethylene resin, which is a polyolefin-based, was used as a base (Comparative Examples 1, 2), when a polyethylene resin and an ethylene vinyl acetate copolymer were mixed at a constant ratio and used as a base (Comparative Example 3), and ethylene acetate Using the vinyl copolymer as a base (Comparative Example 4), a heating element composition was prepared.
상기 실시예 및 비교예의 조성물로 첨가된 발열체 조성물의 제반특성을 측정한 결과를 표 2에 나타내었다.Table 2 shows the results of measuring the overall characteristics of the heating element composition added to the compositions of Examples and Comparative Examples.
상기 표 2의 측정결과에서 알 수 있는 바와같이, 폴리에틸렌 또는 에틸렌 초산비닐 공중합체를 베이스로 이용한 종래 발열체 조성물은 과전 사이클 후 저항치가 초기 저항치에 비해 매우 높아 장시간 사용시 과전 안정성이 떨어지는 반면에, 본 발명 실시예에 의한 발열체 조성물은 저항치가 1차수 정도이므로 장기 과전시 안정성이 우수함을 알 수 있다.As can be seen from the measurement results of Table 2, the conventional heating element composition using a polyethylene or ethylene vinyl acetate copolymer as a base, the resistance after the over-load cycle is very high compared to the initial resistance, while the over-temperature stability during long-term use, while the present invention Since the heating element composition according to the embodiment has a resistance value of about one order, it can be seen that stability during long-term overheating is excellent.
또한, 동작온도의 경우, 비교예는 초기 동작온도 자체가 낮아 100℃ 이상의 고온에서는 사용할 수 없어 발열체 조성물로서의 사용이 불가능하다.In addition, in the case of the operating temperature, the comparative example has a low initial operating temperature itself and cannot be used at a high temperature of 100 ° C or higher, and thus cannot be used as a heating element composition.
그러나, 본 발명의 실시예는 동작온도가 100℃ 이상으로 고온에서 발열체로 사용이 가능하다.However, the embodiment of the present invention can be used as a heating element at a high temperature of more than 100 ℃ operating temperature.
이상에서 설명한 바와같이 본 발명에 의한 자기온도 제어성을 갖는 발열체 조성물은 열가소성이 우수한 폴리우레탄 수지에 도전성 카본블랙 및/또는 그라파이트를 조합하여 첨가한 것으로 고온에서도 사용이 가능하며 발열체 조성물의 고유특성인 자기온도 제어성은 물론 장기 과전 안전성이 우수하다.As described above, the heating element composition having self-temperature controllability according to the present invention is a combination of conductive carbon black and / or graphite added to a polyurethane resin having excellent thermoplasticity and can be used even at high temperatures. It is excellent in self temperature control and long-term overload safety.
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Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019940036559A KR100198233B1 (en) | 1994-12-24 | 1994-12-24 | Self control heating material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019940036559A KR100198233B1 (en) | 1994-12-24 | 1994-12-24 | Self control heating material |
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| Publication Number | Publication Date |
|---|---|
| KR960028687A KR960028687A (en) | 1996-07-22 |
| KR100198233B1 true KR100198233B1 (en) | 1999-06-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| KR1019940036559A KR100198233B1 (en) | 1994-12-24 | 1994-12-24 | Self control heating material |
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| KR (1) | KR100198233B1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101485962B1 (en) * | 2014-08-18 | 2015-01-27 | 주식회사 벤트윈 | Conductive film using thermoplastic polyurethane and manufacturing method thereof |
-
1994
- 1994-12-24 KR KR1019940036559A patent/KR100198233B1/en not_active IP Right Cessation
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101485962B1 (en) * | 2014-08-18 | 2015-01-27 | 주식회사 벤트윈 | Conductive film using thermoplastic polyurethane and manufacturing method thereof |
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| Publication number | Publication date |
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| KR960028687A (en) | 1996-07-22 |
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