insulation material 3025 Phenolic Cotton Cloth Laminate Insulation Sheets

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Basic Info

Place of Origin:	Henan, China (Mainland)

Product Description

1 .Define and purpose of 3025 Phenolic Cotton Cloth Laminate Insulation Sheets is formed through drying and heat pressing after the cotton cloth dips into PF resins. 3025 Phenolic Cotton Cloth Laminate Insulation Sheets has high mechanical performance and is used as insulation structural components for machinery, electric engine and electric equipment, as well as used in transformer oil. 2 .Technical requirement of 3025 Phenolic Cotton Cloth Laminate Insulation Sheet 2.1 Outside appearance Laminated board surface should be flat and tidy. The bubbles, sand holes and inclusions are not allowed. A little of spots are allowed. The edge should be cut tidy. There is no delamination and crackle on end surface 2.2 Main performance index Table 1 : performance index

No.	Item	Unit	Value
1	Density	g/cm3	1.30—1.40
2	Water absorption	mg	Refer to table 2
3	Vertical layer direction bending strength Portrait	MPa	≥100
4	Tensile strength	MPa	≥80
5	Notch impact strength (Simple strut-beam method) Parallel layer direction	KJ/m²	≥8.8
6	Parallel layer direction insulation resistance After digging into water	Ω	≥1.0 × 10⁶
7	Parallel layer direction breakdown voltage At (90±2)°C transformer oil	kV	≥1
8	Vertical layer direction breakdown voltage At (90±2)°C transformer oil	kV/mm	Refer to table 3

Table 2 :Water absorption

Average thickness mm	Water absorption mg	Average thickness mm	Water absorption mg	Average thickness mm	Water absorption mg
0.8	≤201	3.0	≤249	12.0	≤336
1.0	≤206	4.0	≤262	14.0	≤354
1.2	≤211	5.0	≤275	16.0	≤371
1.6	≤220	6.0	≤284	20.0	≤406
2.0	≤229	8.0	≤301	25.0	≤450
2.5	≤239	10.0	≤319	Single side processing to22.5	≤540

Table 3 : electric trength

Average thickness mm	Electric strength kV/mm	Average thickness mm	Electric trength kV/mm	Average thickness mm	Electric strength kV/mm
0.8	≥0.89	1.6	≥0.72	2.6	≥0.56
0.9	≥0.84	1.8	≥0.69	2.8	≥0.53
1.0	≥0.82	2.0	≥0.65	3.0	≥0.50
1.2	≥0.80	2.2	≥0.61
1.4	≥0.76	2.4	≥0.58

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3025 phenolic cotton cloth laminate insulation sheets