Typical properties of Insulation Crepe Paper
|
| Properties |
Units |
SPECIFIED VALUES
Under IEC-60554-3-3 |
TYPICAL OBTAINED TEST VALUES, RBL(GSM) |
| 60/120 |
60/150 |
100/200 |
100/250 |
| Thickness Tolerance |
Mm |
Not required to conform to the tolerances on thickness and, in most cases, the thickness is governed by other specified properties, and is of less importance than are those properties. Where thickness is a property of importance (as, for example, on crepe papers that have been calendered), the nominal values and tolerances shall be as agreed between the purchaser and manufacturer. In all cases, care shall be taken when handling the paper during the sampling and testing procedures not to stretch the paper. |
0.33 |
0.39 |
0.48 |
0.55 |
| Hill Count |
Counts/
10 mm |
The limits for hill count shall be as agreed between the purchaser and the manufacturer. Appropriate values for a given paper will depend upon the density and substance of the base paper, the amount of stretch and various details of the creping operation, and can vary from less than 8 to more than 20 per 10 mm. In general, the hill count will increase with decreasing paper density or substance, or with increasing elongation at break. |
11 |
16 |
11 |
16 |
| Extended Tensile Index(MD) |
Nm/g Min |
39 |
64 |
66 |
65 |
68 |
| Elongation/Stretch At Break (MD) |
% |
The elongation/Stretch at break shall be within 15% of that specified by purchaser |
102 |
157 |
98 |
153 |
| Moisture Content |
Max % |
8 |
4.3� |
4.1 |
4.4 |
4.5 |
| Ash |
Max 5 |
1 |
0.78 |
0.71 |
0.50 |
0.54 |
| Conductivity of Aqueous Extract |
mS/m |
10 Max |
2.6 |
2.1 |
2.9 |
3.5 |
| pH of Aqueous Extract |
|
6-8 |
7.2 |
7.1 |
7.0 |
7.4 |
| Break Down Voltage In Air In Oil |
KV/mm KV/mm |
80% Stretched ( 10 layers) |
10
22 |
10
23 |
11
24 |
10
26 |
| Oil Absorption |
% |
|
51 |
52 |
24 |
26 |
| Density |
gm/cc |
|
0.38 |
0.42 |
0.43 |
0.45 |
