A special sizing agent for glass fiber bulked yarn and its preparation method

Abstract

The invention relates to a special impregnating compound for glass fiber swelled yarn. The special impregnating compound for glass fiber swelled yarn comprises the following components in proportion relative to the total mass of the impregnating compound: 0.2-0.4% of coupling agent, 0.3-0.6% of lubricating agent A, 0.01-0.1% of lubricating agent B, 0.1-0.3% of lubricating agent C, 1-2% of film-forming agent, 0.09-0.2% of ph value regulating agent, and the balance being deionized water. The impregnating compound provided by the invention adopts ultralow molecular weight epoxy emulsion as the film-forming agent, has the advantages of simpleness in preparation process and low cost. The swelled yarn for the mobile muffler padding, which is prepared from the impregnating compound provided by the invention, has an extremely high swelled rate being above 98%, greatly improves filling efficiency and greatly improves performance of a muffler.

Description

technical field [0001] The invention relates to a technology for treating expanded yarn glass fiber used as filler for automobile mufflers, in particular to a special sizing agent for expanded glass fiber yarn and a preparation method thereof. Background technique [0002] The commonly used car muffler filler is to wind stainless steel wire wool on the inner tube of the muffler, and wind E glass fiber needle felt or rock wool material on it, but with the improvement of engine performance, the temperature of exhaust gas increases, resulting in The glass fiber needle felt or rock wool inside the muffler is damaged by heat and flies to the outside, which not only reduces the performance of the muffler, but also pollutes the environment. Now foreign developed countries are gradually adopting the method of directly filling the car muffler with heat-resistant glass fiber after being puffed by special equipment, which not only improves the durability of the car muffler, but also he...

AI Technical Summary

Problems solved by technology

The expanded yarn used for automobile muffler filler is a relatively small application field in glass fiber, and the sizing usually adopts the conventional spun yarn sizing system. This sizing system pays attention to the interfacial bonding performance with the matrix resin, but has the disadvantage of poor expansion. (expansion rate is about 80%) which affects the performance of the muffler

[0004] It can be seen that there are obvious deficiencies and defects in the use of sizing agents in the prior art, and further improvement is urgently needed. Therefore, how to create a kind of expanded yarn for automobile muffler fillers with higher expansion rate, thereby improving its filling capacity. The infiltration agent for efficiency and muffler performance is one of the current important research topics

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