Super-thick glass fiber needle-punched felt and method for manufacturing same

Abstract

The invention discloses an extra-thick needle felt of glass fiber, comprising multiple felt layers of glass fiber piling up together. Vertical short fibers formed by needle are set among said multiple felt layers. The vertical short fiber comprises the upper vertical short fiber, which interludes in the multiple felt of glass fiber from the upper face, and the lower vertical short fiber, which interludes in the multiple felt of glass fiber from the lower face. The thickness of said needle felt is 20-50mm. the setting of bidirectional vertical fiber guarantees that the combination of each layer of needle felt is fastness under the status of needle felt with larger thickness. So the invention is not only provided with good temperature resistance and anticorrosion properties but also selective absorption property for gas and liquid. Because of larger thickness and improved intensity, properties such as heat separation, heat preservation and filtration so on are improved.

Description

technical field [0001] The invention relates to a fiber needle felt, especially an ultra-thick and high temperature resistant fiber needle felt. Background technique [0002] With the enhancement of people's awareness of environmental protection, the application range of needle felt is expanding. In the fields of high-temperature purification, heat insulation, heat preservation, etc., the existing needle-punched felts, including glass fiber needle-punched felts, have higher and higher requirements for performances such as temperature resistance, chemical stability, anti-corrosion, and adsorption. Due to the limitation of the structure of the non-woven equipment itself, the thickness of existing products is difficult to exceed 20mm. If the thickness does not meet the requirements for use, it can only be used in multiple layers, which brings difficulties to construction and is unstable during use. Can not better meet the requirements of use. [0003] The main technological p...

AI Technical Summary

Problems solved by technology

Due to the limitation of the structure of the non-woven equipment itself, the thickness of the existing products is difficult to exceed 20mm. If the thickness does not meet the requirements for use, it can only be used in multiple layers, which brings difficulties to the construction and is unstable during use. Could not better meet the requirements of use

[0003] The main process flow of glass fiber felt at this stage is: raw material-→chopped-→opening-→feeding-→carding-→laying-→needling-→winding; due to the limitation of non-woven fabric production technology, Ultra-thick felt has not been able to break through 20 mm, and can only be used by multi-layer adhesion, which seriously affects the development and use of this material

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