产品介绍 Product introduction
Mica Tape for VPI

     This mica tape is built up with mica as base material and epoxy adhesion as binder to bind plus reinforcing material of alkali free glass cloth on surface. It is perfectly flexible under the normal temperature. After processed by vacuum pressure impregnating technology (VPI) together with impregnated compatible resin, it can be solidified into mica tape. Owing to the high mica content and excellent electrical function, it is noted as the ideal insulation material for the large and medium size high tension electrical machinery with VPI technology.

1、Appearance

     The tape adhesion must be distributed homogeneously without bubble, pore, adhesion, lami-nation, foreigh matter, crack of mica paper, reeling out of glass cloth, loosening of tape coiling, etc.

2、Normal Thickness and Tolerance

Normal Thickness(mm)

Tolerance

Deviation of middle value from normal thickness

Deviation of individual value from normal thickness(mm)

0.11～0.15

±0.02

±0.03

3、Width

Description

unit

Figure

width (mm)

mm

12±1; 15±1; 20±1;25±1; 30±1

     

4、Brink bending

Brink bending of mica tape mustn't exceed by 1mm


5、Length

    Mica tape length is shown by its coiling diameter. Diameter of tape coiling is 95mm±5mm or 115mm±5mm. In it the tying should not more than 1 piece and the shortest length must be no less than 5m. -The mica paper coiling with tying must be marked with symbol.

6、Composition

Description

unit

Figure

0.11mm

0.15mm

Total substance

Figure

g/m2

151

217

Tolerance

±16

±22

Mica content

Figure

120

180

Tolerance

±10

±14

Glass content

Figure

20

20

Tolerance

±2

±2

Binder content

%

5～11

Volatile

%

≤1.0

≤0.5


7、Performance Requirement

Description

unit

Figure

Tensile Strength

N/10mm

≥60

Stiffness

N/m

Negotiation between the supplier and buyer

Air porosity

S/100ml

Shelf life

d

180