WO2008050352A1 - Fire-retardant, self fusible, water repellant, anti tracking, high temperature withstanding silicone elastomer tape for electrical insulation and the process of manufacturing the same - Google Patents
Fire-retardant, self fusible, water repellant, anti tracking, high temperature withstanding silicone elastomer tape for electrical insulation and the process of manufacturing the same Download PDFInfo
- Publication number
- WO2008050352A1 WO2008050352A1 PCT/IN2006/000489 IN2006000489W WO2008050352A1 WO 2008050352 A1 WO2008050352 A1 WO 2008050352A1 IN 2006000489 W IN2006000489 W IN 2006000489W WO 2008050352 A1 WO2008050352 A1 WO 2008050352A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- silicone elastomer
- self
- fire
- tape
- fusible
- Prior art date
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
- H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
- H01B3/46—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes silicones
Definitions
- the invention relates to "Fire-Retardant, Self Fusible, Water Repellant, Anti Tracking, And High Temperature withstanding Silicone Elastomer Tape For Electrical Insulation" and the process of manufacturing the same.
- silicone rubbers are available for insulating and cushioning electrical and electronic assemblies. Silicone rubbers exhibit a wish list of characteristics including superb chemical resistance, high temperature performance, good thermal and electrical resistance, long term resiliency and easy fabrication. Liquid silicone rubbers are available in electrical grades for conformal coating, potting and gluing. Silicone rubbers filled with conducting fillers are available for applications requiring thermal conductivity.
- Silicone elastomer compounded with pigments and curing agents and extruded / calendered to obtain it in tape form which is flexible is used in the insulation of inter connectors of Stator coils of traction motors, Busbar insulation.
- the tape being conformable can be wrapped on contours which results in no air gaps thus imparting good waterproof effect.
- the tape has good resistance to Corona discharges, weathering, oxidation and fungus attack.
- the tape however is not fire retardant.
- new tape having the above referred properties clubbed together with self fusibility and fire retardancy are included in the present invention.
- a silicone- elastomer tape is prepared having self fusible, f ⁇ re- retardant, characteristics for high-temperature electrical insulation purpose.
- a process of manufacturing of the "Fire-retardant,Self fusible, water repellant, anti- tracking and high temperature withstanding silicone elastomer tape for electrical insulation” comprises of a special grade of silicone elastomer suitably modified with fillers, additives and curing agents to impart the self fusible property and extruded / calendered in the form of tape having weight of 500-550 gms per square meter for 0.5mm thick tape.
- the thickness of tape can vary from 0.2mm to 10mm, commensurate with the desired properties of electric strength and breaking strength.
- the calendering / extrusion of the formulated silicone elastomer is carried out using conventional methods and using polymer film like polyester, polyurethane, PTFE film as carrier material followed by curing of the tape.
- silicone elastomer by compounding two or more special grade silicone elastomers having different hardness on a two-roll milling machine/Banbury machine, with fillers like oxides and / or hydroxides of metal, curing agents like organic peroxides and two or more additives as applicable to impart the properties of fire-retardancy and self fusibility.
- the said compounded silicone elastomer having fire-retardancy and self fusibility property is then calendered / extruded on polymeric film like polyester, polyurethane, PTFE film as carrier film followed by curing of the tape.
- the said compounded silicone elastomer having fire-retardancy and self fusibility property is then calendered /extruded on polymeric film like polyester , polyurethane, PTFE film as carrier film & slit to desired sizes & shape followed by curing of the tape
- the said tape finds application in the insulation of inter connectors of Stator coils of traction motors, Busbar insulation etc.
Abstract
A process of manufacturing Fire-Retardant, Self Fusible, Water Repellant, Anti-Tracking And High Temperature Withstanding Silicone Elastomer Tape For Electrical Insulation comprising of formulation of silicone elastomer by compounding two or more special grade silicone elastomers having different hardness on a two-roll milling machine/Banbury machine, with fillers curing agents, and two or more additives as applicable to impart the properties of fire-retardancy and self fusibility. Extrusion / Calendering of formulated silicone elastomer to achieve the required thickness of the silicone elastomer tape by use of conventional extrusion / calendering methods followed by heating silicone elastomer tape by conventional methods and using polymeric film as carrier. The silicone elastomer tape so obtained is cut to desired sizes and shapes. Alternatively the said compounded silicone elastomer is then calendered /extruded on polymeric film like polyester film as carrier film and slit to desired sizes and shape followed by curing of the tape.
Description
"FIRE-RETARDANT, SELF FUSIBLE, WATER REPELLANT, ANTI TRACKING, HIGH TEMPERATURE WITHSTANDING SILICONE ELASTOMER TAPE FOR ELECTRICAL INSULATION" AND THE PROCESS OF MANUFACTURING THE
SAME"
FIELD OF THE INVENTION:
The invention relates to "Fire-Retardant, Self Fusible, Water Repellant, Anti Tracking, And High Temperature withstanding Silicone Elastomer Tape For Electrical Insulation" and the process of manufacturing the same.
DESCRIPTION OF THE PRIOR-ART:
Various types of electrical insulation tapes are available in the market. But the said tapes do not have all the properties such as self fusible, fire retardant, water repellant, anti- tracking properties. The electrical insulation tapes cause fire and loss of properties to the users of such tapes.
A variety of silicone rubbers are available for insulating and cushioning electrical and electronic assemblies. Silicone rubbers exhibit a wish list of characteristics including superb chemical resistance, high temperature performance, good thermal and electrical resistance, long term resiliency and easy fabrication. Liquid silicone rubbers are available in electrical grades for conformal coating, potting and gluing. Silicone rubbers filled with conducting fillers are available for applications requiring thermal conductivity.
Silicone elastomer compounded with pigments and curing agents and extruded / calendered to obtain it in tape form which is flexible is used in the insulation of inter connectors of Stator coils of traction motors, Busbar insulation. The tape being conformable can be wrapped on contours which results in no air gaps thus imparting good waterproof effect. The tape has good resistance to Corona discharges, weathering, oxidation and fungus attack. The tape however is not fire retardant. To overcome this
problem, new tape having the above referred properties clubbed together with self fusibility and fire retardancy are included in the present invention.
The patent No. GB0869778A dated 7-6-1961 to GEN ELECTRIC is attributed to Electrically insulating material comprising of Polyester - glass cloth coated with silicone elastomer. This product is non-fire retardant and also has polyester and fiber glass cloth as its constituents and hence the patent is not related to the present invention.
SUMMARY OF THE INVENTION:
In the present invention a , silicone- elastomer tape is prepared having self fusible, fϊre- retardant, characteristics for high-temperature electrical insulation purpose.
A process of manufacturing of the "Fire-retardant,Self fusible, water repellant, anti- tracking and high temperature withstanding silicone elastomer tape for electrical insulation" comprises of a special grade of silicone elastomer suitably modified with fillers, additives and curing agents to impart the self fusible property and extruded / calendered in the form of tape having weight of 500-550 gms per square meter for 0.5mm thick tape. The thickness of tape can vary from 0.2mm to 10mm, commensurate with the desired properties of electric strength and breaking strength. The calendering / extrusion of the formulated silicone elastomer is carried out using conventional methods and using polymer film like polyester, polyurethane, PTFE film as carrier material followed by curing of the tape.
The steps involved are as follows:
1) Formulation of silicone elastomer by compounding two or more special grade silicone elastomers having different hardness on a two-roll milling machine/Banbury machine, with fillers like oxides and / or hydroxides of metal, curing agents like organic peroxides and two or more additives as applicable to impart the properties of fire-retardancy and self fusibility.
2) The said compounded silicone elastomer having fire-retardancy and self fusibility property is then calendered / extruded on polymeric film like polyester, polyurethane, PTFE film as carrier film followed by curing of the tape.
3) The calendered /extruded tape so obtained is cut to desired sizes and shapes.
4) Alternatively the said compounded silicone elastomer having fire-retardancy and self fusibility property is then calendered /extruded on polymeric film like polyester , polyurethane, PTFE film as carrier film & slit to desired sizes & shape followed by curing of the tape
5) The said tape has the following features:-
(a) Self Fusibility
(b) Fire retardancy,
(c) High electrical insulation,
(d) Anti-tracking,
(e) High-temperature withstanding capability, and
(f) Water repellency.
This high temperature withstanding (Class-H) tape successfully passes the Underwriters Laboratories Specification UL-510 - flame retardancy test.
The said tape finds application in the insulation of inter connectors of Stator coils of traction motors, Busbar insulation etc.
CONSTRUCTION:
Formulated Silicone Elastomer with Self Fusible property Polyester film
Claims
WE CLAIM:
1-. A- process of manufacturing Fire-Retardant, Self fusible, Water Repellant, Anti- Tracking And High Temperature Withstanding Silicone Elastomer Tape For Electrical Insulation" comprises of the following steps:-
(a) (i) Formulation of silicone elastomer by compounding two or more special grade silicone elastomers having different hardness on a two-roll milling machine/Banbury machine, with fillers like oxides and / or hydroxides of metal, curing agents, and two or more additives as applicable to impart the properties of fϊre-retardancy and self fusibility.
(a) (ii) Extrusion / Calendering of formulated silicone elastomer having fire-retardancy & self fusibility property to achieve the required thickness of the silicone elastomer tape by use of conventional extrusion / calendering methods followed by heating silicone elastomer tape by conventional methods & using polymeric film as carrier ;
(a) (iii) the silicone elastomer tape so obtained is cut to desired sizes and shapes.
(b) Alternatively the said compounded silicone elastomer having fire-retardancy and self fusibility property is then calendered /extruded on polymeric film like polyester film as carrier film & slit to desired sizes & shape followed by curing of the tape.
2. A process of manufacturing "Fire-Retardant, Self fusible, Water Repellant, Anti- Tracking And High Temperature Withstanding Silicone Elastomer Tape " For Electrical Insulation" as claimed in Claim 1 wherein the said formulated silicone elastomer is made by compounding two or more special grade silicone elastomers having different hardness on a two-roll milling machine with fillers like oxides and / or hydroxides of metal, curing agents and two or more additives to impart the properties of fire-retardancy and self fusibility.
3. A process of manufacturing "Fire-Retardant, Self fusible, Water Repellant, Anti- Tracking And High Temperature Withstanding Silicone Elastomer Tape For Electrical Insulation" as claimed in Claim 1 and 2 wherein the polymeric film used as carrier can be polyester, polyurethane, PTFE .
4. A process of manufacturing "Fire-Retardant, Self fusible, Water Repellant, Anti- Tracking And High Temperature Withstanding Silicone Elastomer Tape For Electrical Insulation" as claimed in Claim 1 to 3, by which Fire-Retardant, Self Fusible, Water Repellant, Anti-Tracking And High Temperature Withstanding Silicone Elastomer Tape For Electrical Insulation" is obtained.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IN1767MU2006 | 2006-10-26 | ||
| IN1767/MUM/2006 | 2006-10-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2008050352A1 true WO2008050352A1 (en) | 2008-05-02 |
Family
ID=38268824
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/IN2006/000489 WO2008050352A1 (en) | 2006-10-26 | 2006-12-11 | Fire-retardant, self fusible, water repellant, anti tracking, high temperature withstanding silicone elastomer tape for electrical insulation and the process of manufacturing the same |
Country Status (1)
| Country | Link |
|---|---|
| WO (1) | WO2008050352A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112341948A (en) * | 2020-10-15 | 2021-02-09 | 上海赛赢实业有限公司 | High-temperature-resistant high-strength sealing adhesive tape with waterproof, shockproof and deformation-resistant functions |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB868041A (en) * | 1958-05-21 | 1961-05-17 | Midland Silicones Ltd | Improvements in or relating to electrical insulation |
| GB956418A (en) * | 1961-07-13 | 1964-04-29 | Dow Corning | High voltage electric insulation |
| GB1240701A (en) * | 1968-07-19 | 1971-07-28 | Isolierwerk Zehdenick Veb | Electric insulating tape or web |
| JPH02206546A (en) * | 1989-02-07 | 1990-08-16 | Shin Etsu Chem Co Ltd | Pressure sensitive adhesive silicone rubber structure |
| JP2002275450A (en) * | 2001-03-21 | 2002-09-25 | Nitto Denko Corp | Silicone-based pressure-sensitive adhesive composition and pressure-sensitive adhesive tape using the same |
-
2006
- 2006-12-11 WO PCT/IN2006/000489 patent/WO2008050352A1/en active Application Filing
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB868041A (en) * | 1958-05-21 | 1961-05-17 | Midland Silicones Ltd | Improvements in or relating to electrical insulation |
| GB956418A (en) * | 1961-07-13 | 1964-04-29 | Dow Corning | High voltage electric insulation |
| GB1240701A (en) * | 1968-07-19 | 1971-07-28 | Isolierwerk Zehdenick Veb | Electric insulating tape or web |
| JPH02206546A (en) * | 1989-02-07 | 1990-08-16 | Shin Etsu Chem Co Ltd | Pressure sensitive adhesive silicone rubber structure |
| JP2002275450A (en) * | 2001-03-21 | 2002-09-25 | Nitto Denko Corp | Silicone-based pressure-sensitive adhesive composition and pressure-sensitive adhesive tape using the same |
Non-Patent Citations (2)
| Title |
|---|
| DATABASE WPI Week 199039, Derwent World Patents Index; AN 1990-294031, XP002444194 * |
| DATABASE WPI Week 200276, Derwent World Patents Index; AN 2002-703530, XP002444193 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112341948A (en) * | 2020-10-15 | 2021-02-09 | 上海赛赢实业有限公司 | High-temperature-resistant high-strength sealing adhesive tape with waterproof, shockproof and deformation-resistant functions |
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