Long nozzle sealing gasket

The invention discloses a long nozzle sealing gasket. The sealing gasket is formed by mixing the following components: by weight, 25-35% of brown fused alumina particles with the particle size of 0.1-1 mm, 15-30% of brown fused alumina fine powder with the particle size less than or equal to 0.088 mm, 20-25% of alpha-aluminum oxide with the particle size of 4-9 microns, 16-20% of aluminum oxide sol with the particle size of 10-20 nm, 2-7% of mica powder with the particle size of 40-50 microns, and 2-4% of organic silicon resin. The long nozzle sealing gasket provided by the invention is low inporosity and capable of effectively isolating the air. 本发明公开了一种长水口密封垫，该密封垫采用以下组份混合制成，各组份及其重量百分比为：粒度为0.1～1mm的棕刚玉颗粒：25～35％；粒度不大于0.088mm的棕刚玉细粉：15～30％；粒度为4～9μm的α-氧化铝：20～25％；粒度为10-20nm的氧化铝溶胶：16～20％；粒度为40～50μm的云母粉：2～7％；有机硅树脂：2～4％。本发明的长水口密封垫，气孔率低，有效隔绝空气。