Novolac epoxy scraper and manufacturing method thereof

Abstract

The invention discloses a phenolic epoxy resin scraper and a preparation method thereof, which comprises the steps of: (1) the preparation of a scraper substrate: a resin adhesive is chosen as the substrate, and the weight portions of components are as follows: 38 portions to 50 portions of F51 or NPPN638S or KEP-1138 phenolic epoxy resin, 1 portion to 3 portions of epoxy resin toughening agent, 5 portions to 12 portions of dicyandiamide, 0.003 portion to 0.008 portion of imidazole, 13 portions to 15 portions of dimethylformamide, 10 portions to 20 portions of acetone, 15 portions to 20 portions of silicon micropowder and 1.5 portions of molybdenum disulfide; and (2) a multilayer fiber cloth is treated with sizing under the high temperature of 160 DEG C, and is pressed and solidified under the rising temperature. The phenolic epoxy resin scraper made by adopting the substrate has the structural form as follows: the length of the scraper is customized as needed, the thickness of the scraper is 1.5mm to 5mm and the width of the scraper is 76mm to 200mm; the scraper is edged at one side along the length direction, and the angle of the cutting edge is 20 degrees to 60 degrees; and theside of the scraper that is not edged is provided with a connecting device. The scraper is reasonable in making method and durable in use and has the popularization value.

Description

(1) Technical field: [0001] The invention relates to a scraper and a manufacturing method thereof, in particular to a high-strength, high-toughness novolak epoxy resin scraper and a manufacturing method thereof. It belongs to the technical field of papermaking equipment supporting cutter manufacturing. (two) background technology: [0002] At present, the scrapers used in papermaking machinery are steel scrapers or epoxy resin scrapers. During the production process, steel scrapers are hard and have poor toughness, which can easily scratch the rollers. In this way, manufacturers waste time in repairing rollers and cause a lot of economic losses. ;Epoxy resin scraper is brittle and has poor temperature resistance. During use, the blade can easily become jagged and scratch the blanket, causing shutdown. Poor temperature resistance makes the blade soft, and the dirt on the roller cannot be scraped off. When making writing paper with graphite powder, it is easy to fade and caus...

AI Technical Summary

Problems solved by technology

[0002] At present, the scrapers used in papermaking machinery are steel scrapers or epoxy resin scrapers. During the production process, steel scrapers are hard and have poor toughness, which can easily scratch the rollers. In this way, manufacturers waste time in repairing rollers and cause a lot of economic losses. ;Epoxy resin scraper is brittle and has poor temperature resistance. During use, the blade can easily become jagged and scratch the blanket, causing shutdown. Poor temperature resistance makes the blade soft, and the dirt on the roller cannot be scraped off. When making writing paper with graphite powder, it is easy to fade and cause black marks on the white paper, so it is scrapped and causes serious waste.

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