Phenolic Sheet 4x8

Production Description

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  Phenolic cotton laminate definition and use

Phenolic Sheet is made of cotton cloth impregnated with phenolic resin by drying and hot pressing, 3026 is made of bleached cloth impregnated with phenolic resin by hot pressing and laminates. 3025 has high mechanical properties, suitable for machinery, motors, electrical equipment for insulating structural parts, and can be used in transformer oil. 3026 has high mechanical strength, suitable for tape gear wheel, guide wheels and other mechanical products. 

Technical Requirements

  Phenolic cotton laminate appearance

The surface of phenolic cotton laminate should be flat, no vapor bubbles, pockmarks and impurities, a small number of spots are allowed. The edge should be neatly cut, and the end face should not have delamination and cracks.

 

Application

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  Phenolic Cotton Cloth Laminated Sheet is suitable for base of MV panel, processing parts of insulating materials, pads for drilling in the PCB industry, distribution boxes, jig boards, mold splints, high and low voltage wiring boxes. Also, it is used in bearings and gears of motors, mechanical molds, ICT jigs, forming machines, drilling machines, Table top grinding pads, packaging machine, etc.

 

It can be machined to bakelite tea tray board

 

3021 Phenolic Paper Board

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  3021 Phenolic Paper Laminate Sheet is made of insulation paper impregnated with phenolic resin in heat-rolling and tightening, baking and curing. Widely used as insulating structure parts in motor, electrical equipment and used in transformer oil. Suitable for being the backup board for PCB, switch cabinet, jag board, die splint, packing machine, high frequency welding machine, forming machine, drilling machine and table grinding machine, etc.

Black and orange phenolic paper boards are both available now! There are two sizes which are 1040mm * 2080mm and 1220mm * 2440mm.

Table 1:Performance index of phenolic cotton cloth laminate

Serial No.	Project name	Unit	Test method	Targets
3025			3026
1	Density	g/cm	GB/T5130	1.30~1.40	-
2	Absorbent	mg	GB/T5130	Refer to table 2	Refer to table 3
3	Vertical Layer Bending Strength Longitudinal	Mpa	GB/T5130 (Q/JBQP51-2001)	≥100	≥140
4	Tensile Strengths	Mpa	GB/T5130中	≥(80)	≥98
5	bonding strength	N	JB886-75	≥(5390)
6	Compression strength Vertical Layer Parallel Layer	MPa	GB/T5130	- -	≥245 ≥147
7	Notched impact strength (simply supported beams) Parallel Layer	kJ/m	GB/T5130	≥8.8	≥6.8
8	Parallel layerwise insulation resistance After immersion in water	Ω	GB/T5130	≥1.0×10	-
9	Parallel layer breakdown voltage In transformer oil at (90+2)°C	kV	GB/T5130	≥10	-
10	Vertical laminar electrical strength In transformer oil at (90+2)°C	kV/mm	GB/T5130	Refer to Table4	-

Table 2:Water absorption of phenolic cotton cloth laminate

Average thickness(mm)	absorbency(mg)	Average thickness(mm)	absorbency(mg)	Average thickness(mm)	absorbency(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	One-sided processing to 22.5	≤540

Table 3:Water absorption of phenolic cotton cloth laminate

Average thickness(mm)	absorbency(mg)	Average thickness(mm)	absorbency(mg)	Average thickness(mm)	absorbency(mg)
0.4	≤186	2.0	≤229	10	≤319
0.5	≤190	2.5	≤239	12	≤336
0.6	≤194	3.0	≤249	14	≤354
0.8	≤201	4.0	≤262	16	≤371
1.0	≤206	5.0	≤275	20	≤406
1.2	≤211	6.0	≤284	25	≤450
1.6	≤220	8.0	≤301	One-sided processing to 22.5	≤540

Table 4:Electrical strength of phenolic cotton fabric laminates

Average thickness(mm)	Electrical Strength(kV/mm)	Average thickness(mm)	Electrical Strength(kV/mm)	Average thickness(mm)	Electrical 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

 

Factory

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  Hongda Insulation Materials Factory is a new material enterprise integrating scientific research, development, production, sales and service. The company has expanded its scale constantly through years of accumulated development, and the main products include 3240 epoxy plate, FR4 fiberglass sheet, 3026 phenolic cotton board, and phenolic paper board.

  Our company covers an area of 30,000m², with 13,000 tons of annual productivity, more than 20 full-time, and part-time senior engineering technicians and new product developers as well as stronger development and production capacity of insulating plate products.

  Our company is also the partner of foreign merchants and foreign trade enterprises. There are lots of trading company from both China and other countries taking the products from us each year.

  One of our greatest advantage is the orders which are directly from us has the priority to produce first. Also, we have our own logistics company, so it can provide safe and fast service to you. What we are trying to do is providing our customers one-stop service from production to delivery.

 

Production Process

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Packaging and Shipping

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Regular packing, Protect by Pallet