Crepe Paper tube for Transformers Electrical Insulation Material

Short Description:

Crepe paper tubes are used for transformers with the length of 1.8 and 2 meters. Our factory now has 5 sets of automatic transformer insulating crepe tube manufacturing equipment which is designed independently and the only one in China, and 3 sets of insulating crepe tube manufacturing equipment. We can produce about 15,000 pieces of insulating crepe tubes per day. We are the domestic factory with biggest delivery capability of insulating crepe tube.

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Advantages

The insulating crepe tube produced by the insulating crepe tube automatic machine has advantages that manual and semi-automatic machines do not have at all. As for the same inner diameter and out diameter, in accordance with the design principle of the transformer, the higher the number of turns is, the better the insulation will be. Meanwhile, the more tightly it is wrapped, the higher its elasticity, flexibility and bending resistance will be. Accordingly, with the same specifications and the same number of pieces, the hand-rolled crepe tube is loose because there are fewer layers and the weight of its finished product is only half of that of the automatic products. At the same time, the hand-rolled crepe tube does not have any flexibility and strength at all.
Our factory researched and developed successful glue. After many improvements, it is increasingly mature. Our factory adopts high-grade pure resin, high reaction temperature and quality production without any impurities and finally, the PVA-based electrical insulation glue with high purity and high effective constituents is produced, which has extremely strong bond strength. Even if they are strongly distorted, beat on hard objects, or torn destructively. And such products have no harms to the transformer insulation. This special PVA glue can meet the demanding requirements for imported products.

Specifications

ITEM		TYPICAL VALUES	MATTER OF FACT
Thickness: mm（crepe paper single layer）		0.35±0.05	0.379 (0.378; 0.379, 0.379)
Length : mm		-5%+5%	±5%
Inner diameter:		+0.5/-0 mm	0-0.4mm
Outer diameter:		+1.0/-0 mm	0-0.7mm
Moisture content ,﹪		≤8﹪	7.2
PH water extract:		6.0 to 8.0	6.4
Ash content,﹪ maximum		1﹪	0.35
Tensile strength, N/mm² （crepe paper） Machine direction: Cross machine direction:		＞3.71 ＞5.6	6.0 7.1
Crepe rate: %		＞50%	52%
Conductivity of aqueous extract: (Base paper)Ms/m		≤8.0	4.7
Dielectric breakdown: crepe paper （volts/single layer, dry test）		≥1000	1200 (1200; 1100; 1300)
Dielectric breakdown: crepe paper （volts/wall Thk, dry test）	Thickness 1mm	≥2700
	Thickness 1.5mm	≥4000	≥5000
	Thickness ≥2mm	≥5400	≥5000