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A preparation method of polycrystalline alumina fiber needle-punched liner

A polycrystalline alumina, fiber technology, used in needle punching machines, textiles and papermaking, non-woven fabrics, etc., to achieve excellent application characteristics, strong stretchability, and high stability.

Active Publication Date: 2022-04-01
江苏腾利特种纤维科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] 3. At present, only fiber needle-punched blankets can be produced in China, and the fiber liner is still blank. However, the thickness of fiber blanket production is greater than 10mm, and the three-way catalytic converter liner below 10mm is still the bottleneck.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] PCW long fibers are used for weaving and dry forming to obtain needle-punched pads. The PCW long fibers have the following physical parameters:

[0040] The maximum operating temperature is 1600°C, and the chemical composition is Al according to the mass ratio 2 o 3 Accounted for 72%, SiO 2 Accounting for 28%, the specific gravity is 3.4g / cm 3 , the loss on ignition is 0.5%, the fiber diameter is 3-7μm, the fiber content is >92%, the fiber length is 5-10cm, the tensile strength is >1500Mpa, and the tensile modulus is 9.8×10 4 Mpa, the loss on ignition refers to the content of organic matter lost after burning, and the fiber content > 92% means that the content of slag balls or other impurities in the PCW long fibers is < 8%.

[0041] Include the following steps:

[0042] (1) Preliminary opening of fibers:

[0043] Change the fiber entanglement state by opening the fiber raw cotton supplied by the original fiber manufacturer, and disperse the entangled fiber cluster...

Embodiment 2

[0059] PCW long fibers are used for weaving and dry forming to obtain needle-punched pads. The PCW long fibers have the following physical parameters:

[0060] The maximum operating temperature is 1600°C, and the chemical composition is Al according to the mass ratio 2 o 3 Accounted for 72%, SiO 2 Accounting for 28%, the specific gravity is 3.4g / cm 3 , the loss on ignition is 0.5%, the fiber diameter is 3-7μm, the fiber content is >92%, the fiber length is 5-10cm, the tensile strength is >1500Mpa, and the tensile modulus is 9.8×10 4 Mpa, the loss on ignition refers to the content of organic matter lost after burning, and the fiber content > 92% means that the content of slag balls or other impurities in the PCW long fibers is < 8%.

[0061] Include the following steps:

[0062] (1) Preliminary opening of fibers:

[0063] Change the fiber entanglement state by opening the fiber raw cotton supplied by the original fiber manufacturer, and disperse the entangled fiber cluster...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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PUM

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Abstract

The present invention relates to the field of manufacturing methods of fiber liners, in particular to a method for preparing polycrystalline alumina fiber needle-punched liners, which uses PCW long fibers to weave and then dry-forms to obtain needle-punched liners, comprising the following steps (1) Preliminary opening of fibers; (2) Collecting cotton; (3) Carding and laying; (4) Needle punching; (5) High temperature drying; (6) Cutting into the set size to obtain polycrystalline oxidation Aluminum fiber needle-punched liner. In the present invention, PCW long fibers are selected for braiding dry forming without glue. To ensure that the high-temperature filling density and support force remain constant, weaving overlapping long fibers also effectively avoids the possibility of the gasket itself being eroded by the engine exhaust flow. The preparation method of the polycrystalline alumina fiber needle-punched liner provided by the invention fills up the current domestic blank and solves the problem of high cost of imported products.

Description

technical field [0001] The invention relates to the field of manufacturing methods of fiber mats, in particular to a preparation method of polycrystalline alumina fiber needle-punched mats. Background technique [0002] As people pay more and more attention to environmental protection, the state has also increased its control in laws and regulations; the automobile industry, as an important pillar industry, has always received a lot of attention on its exhaust emissions. Steady advancement and implementation; just because of the adjustment of the national macro policy, the automobile-related industries and technologies must also be updated to meet the stricter requirements of national laws. [0003] The liner is a very critical component in the automobile exhaust system, and the quality of the liner directly affects the design, efficiency and stability of the exhaust system. The polycrystalline alumina fiber needle-punched non-intumescent liner is currently the most high-en...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D04H1/02D04H1/46D04H1/4209D04H1/732D04H18/02
CPCD04H1/02D04H1/4209D04H1/46D04H1/732D04H18/02D10B2101/08
Inventor 赵伟张爱文蒋帅
Owner 江苏腾利特种纤维科技有限公司
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