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Harmful irregularity refers to one of the following characteristics, namely uniformity damage, damage to the surface smooth contour defects, such as holes, cracks, local uplift, incision, mixed conductive foreign body, creasing, gap, concave and convex ripple and casting marks, etc. Harmless irregularity refers to the irregular appearance of the surfaces formed during the production process.The details are as follows:
The specification of the natural rubber sheet
(1) it can be divided into 5 kv, 10kv, 20kv, 25kv, 35kv according to the voltage level
(2) the color can be divided into: black, red, green etc
(3) the thickness can be divided into: 2mm, 3mm, 4mm, 5mm, 6mm, 8mm, 10mm, 12mm, 15mm, 20mm, 25mm, 30mm, 40mm, 50mm.
Natural rubber plate use range and storage mode:
It is widely used in substation, power plant, distribution room, laboratory and field.
Should be stored in dry and ventilated environment, stay away from heat source, and leave the ground and wall 20cm above.Avoid exposure to acid base and oil, and avoid exposure to direct sunlight.
Natural rubber sheets' thickness
The thickness measurement and inspection should be carried out randomly on the whole natural rubber plate.The instrument can be measured with a thousand points of the heart or the same precision.Accuracy should be within 0.02 mm micrometer, measure the diameter of the drill is 6 mm, flat the diameter of the presser foot was (3.17 + 0.25) mm, presser foot should be able to exert pressure (0.83 + 0.03) N. Insulation pads should be placed flat, so that the micrometer to measure between is smooth.