fiberglass tape for casting resin dry transformer

fiberglass tape for casting resin dry transformer The characteristic 1,Web Banding Tapes are divided into thermal class H;F. Parallel Banding Tape is thermal class B. 2,The thickness of tapes are 0.17mm,0.30mm,0.33mm. The width of tapes ranges from 6mm to 50mm. The length of each pancake ranges from 50 to 200 meters. The spools are from 1500 to 2000 meters. 3,Two kinds of resin, polyester and epoxy resin are impregnated for banding tapes. Polyester resin impregnated banding tape possessed longer storage time. 4,The tapes provide high tensile strength before curing. It reaches more than 1500 N/cm for 0.30mm thick tape. 5,The tapes need short curing time, 4 – 5 hours at 155C (continuely curing ). 6,Tapes have good dielectric, more than 12kv per milimeter. 7,Banding tapes contribute long storage time, six months at 25C ( three months for epoxy resin impregnated banding tape). They are good for storage, avoiding wasting. 8,The products are easy unwind and high efficiency application. Application 1,Banding tape should be stored in the condition of room temperature. If environment temperature is above 30 degree , the products should be put in the freezer. 2,The testing of properties (for example: test volatile content) should be carried within one hour after the banding tape is taken from the plastic bag. 3,When apply the banding tape, keep it in the plastic bag at the room temperature for 24 hours after taking out from the freezer. 4,During the process of application, uneven tension and unsmooth banding would make the tape separation. You could continue to use after neatening the remaining pancake.5,Banding process should proceed at the room temperature. Better effect will obtain if the process is put up at the heat condition.Heat banding process is as follows: A.Preheat the work piece at the temperature 80 degree for one hour. B. Prereheat the banding tape at the temperature 40+/-5 degreefor 20 minutes. Preheat can not be over the time to avoid the tape to be cured in advance,. The tape preheated should be used up once. 6,Certain tension should be applied to the banding tape. Tension is less than 1000N/cm for 0.30mm thick tape , The speed is good enough at 10m-15m /min. 7, In order to prevent the loosen of the tape, its end should be locked when the banding work finished. Insert the end into inner layer of the tape and press tightly. 8,It is recommended to cure the finished banding work piece continuely at several stage: 80 degree for 1 hour; 120 degree for 1 hour; 155 degree for 3 - 4 hours. It needs 6 hours for tractor motor and industrial large motor ( above-mentioned exclude the time for work piece to reach the curing temperature). 9, If you would treat dry process of varnish dipping and curing of banding tape together, it is necessary to do a trial to make sure that the dry process will not affect the curing of banding tape. 10,If you want banding process by hands, the tapes should provide richer resin content and higher volatile content than normal . Polyglass Banding Tape (2853-W,2841-W) Specifications: 1) Thermal class:H (180 C) F (155°C) 2) Loss of weight at calcination: 26% ± 2% 3) Tensile strength before curing: ≥ 1000N/cm 4) Thickness (mm): 0.17, 0.30 5) Width (mm): 10, 15, 20, 25, 30, 50 6) Storage time:2 8months Inner packing: Plastic bag Dimensions: 320 x 350mm Outer packing: Carton Dimensions: 300 x 300 x 300mm Polyglass Tape (2830) Specifications: 1) Thermal class:B (130° C) 2) Loss of weight at calcination: 27% ± 2% 3) Tensile strength before curing: ≥ 500N/cm 4) Thickness (mm): 0.17, 0.30 5) Width (mm): 10, 15, 20, 25, 30, 50 6) Storage time:2 8months Inner packing: Plastic bag Dimensions: 320 x 350mm Outer packing: Carton Dimensions: 300 x 300 x 300mm.