Application of high-temperature aging resisting adjuvant for transformer insulating paper
A technology for insulating paper and transformers, applied in insulators, organic insulators, plastic/resin/wax insulators, etc., and can solve problems such as limited effects
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example 1
[0009] Example 1: Add glucomannan to pure wood pulp at 0.5% of dry pulp, and use ZQJ paper sampler to make 60g / m 2 Basis weight paper, predried to 30% (by weight) moisture. Compound glucomannan, melamine, and polyacrylamide in a weight ratio of 1:2:2, dissolve the auxiliary agent in water to a solid content of 10%, and apply the auxiliary agent to 25% of the dry pulp by brushing Add it to the insulating paper that has been pre-dried with moisture, and dry the moisture to obtain high-temperature aging-resistant insulating paper.
[0010] Carry out anti-high temperature aging test: put the above-mentioned insulating paper in a vacuum tube, insert copper wire in the vacuum tube to accelerate aging, seal the vacuum tube, heat up to 105°C and vacuum dry for 5 hours to drain the water, suck 25# transformer oil in The insulating paper was completely covered in the vacuum tube, heated to 150°C, and after 7 days of aging test, the obtained insulating paper was subjected to constant te...
example 2
[0011] Example 2: According to Example 1, no additives are added to the pure wood pulp, and it is copied to 60g / m with a ZQJ paper sampler 2 Quantitative pure wood pulp paper, pre-dried to contain 30% (weight) moisture, 1:1 weight ratio of melamine, polyacrylamide 10% solid content solution is added to the dry pulp by brushing 20% On the pre-dried paper, after the aging test, the mechanical properties tested are shown in Table 1.
example 3
[0012] Example 3: According to Example 1, the weight ratios of glucomannan, melamine, and polyacrylamide in the compounding auxiliary agent were adjusted to be 1:1:1, 1:4:4, and 1:6:6 respectively, and elemental analysis showed that Nitrogen content, after aging test, the tested mechanical properties are shown in Table 2.
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