TIANJIN H & D SEALING THERMAL INSULATION MATERIALS CO.,LTD

一、It is made of phenolic resin and cotton cloth, types are 3025, 3026, 3027, 3208. Good electric performance and mechanical property under normal condition. Fit for insulating parts which need certain mechanical performance and electric performance for machine, motors and electrical apparatus and they can also be used for the transformer oil.
二、equirement

1、 Appearance: surface should be flat and velvet, without wrinkle and crack, avoid other disfigurement, such as scratch, impress, a few spot is available

2、Width, length and permissible error (Unit: mm)

Width and length	Permissible error	Width and length	Permissible error
450-1000	±15	＞1000～2600	±25

3、max windage between laminated board and 1000mm ruler）（单位 mm Unit: mm）

Nominal thickness	Permissible error	Nominal thickness	Permissible error
1.6～3	见注See remark	＞6～8	8
＞3～6	10	＞8	6
Remark: permissible windage towards laminating board with 1.6～3 nominal thickness are under consideration by the state.

4、Performance Index

No.	Performance	Unit	Performance Index
No.	Performance	Unit	3025	3026	3027	3028
1	Vertical Bending Strength	Mpa	≥100	≥110	≥90	≥100
2	Bending Elastic Modulus of Appearance	Mpa	≥7000	≥7000	≥7000	≥7000
3	Parallel shear strength	Mpa	≥25	≥25	≥20	≥20
4	Peel strength	Mpa	≥80	≥85	≥60	≥80
5	Parallel Breakdown Voltage (90±2℃ OIL)	Kv	≥1	≥1	≥18	≥20
6	Comparative creepage tracking index	/	≥100	≥100	≥100	≥100
7	T1 Long-term thermostability	/	≥120	≥120	≥120	≥120
8	Density	g/cm3	1.3～1.4	1.3～1.4	1.3～1.4	1.3～1.4

Phenolic cotton cloth laminated sheet 3025-2(brown)

Phenolic cotton cloth laminated sheet 3025-M(black)