Preparation method for producing gasket of automobile exhaust purifier by using expanded perlite
A technology for expanding perlite and automobile exhaust gas is applied in the field of preparation of auto parts materials, which can solve the problems of affecting the thermal conductivity and mechanical strength of materials, affecting the thermal insulation effect, and increasing the thermal conductivity of expanded perlite, so as to increase the silanol group. Concentration, good swelling performance, the effect of reducing water absorption
Inactive Publication Date: 2018-05-29
ANHUI HONGSHI OPTOELECTRONICS HIGH TECH CO LTD
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- Application Information
AI Technical Summary
Problems solved by technology
However, expanded perlite has a high water absorption rate, and the thermal conductivity of expanded perlite after water absorption is greatly increased, which affects its heat insulation effect. When it is made into an automobile exhaust purifier liner, the thermal conductivity and mechanical properties of the material will be affected strength
Method used
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Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0023] A preparation method of using expanded perlite to make automobile exhaust gas purifier liner. Firstly, phenolic resin is used to coat the expanded perlite to reduce the water absorption rate of the expanded perlite. The mixture is mixed, molded and dried.
[0024] Specific steps are as follows:
[0025] (1) Preprocessing:
[0026] 25 parts by weight of expanded perlite were sieved with a sieve to obtain particles with a particle size of 30 meshes, then washed 3 times with 5% NaOH solution, then repeatedly washed with distilled water until the pH value was neutral, and dried for later use;
[0027] (2) Coating treatment of expanded perlite:
[0028] Take a certain amount of ethanol and dissolve 15 parts of phenolic resin to make a phenolic resin coating solution. Using a coating machine, use the phenolic resin as the coating solution, add 2 parts of calcium carbonate as a conditioner, blow in hot air at 160 ° C, and dry for 2 Hour, obtain the expanded perlite of pheno...
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Abstract
The invention discloses a preparation method for producing a gasket of an automobile exhaust purifier by using expanded perlite, wherein the gasket is prepared by firstly enveloping the expanded perlite through phenolic resin to reduce the water absorption of the expanded perlite, then mixing the expanded perlite with acidized sepiolite and an adhesive, and forming and drying. The phenolic resin is used to envelope the expanded perlite, a layer of flexible polymer is coated on the surface of the expanded perlite, on one hand, a pore in the surface of the expanded perlite is kept at a closed state to reduce the water absorption, so that the heat conductivity coefficient of the gasket material is reduced, on the other hand, the compressive property of the enveloped expanded perlite is better, the prepared gasket materials has a better expanding property, better gas tightness is provided, and meanwhile, the gasket material has the effects of thermal insulation and shock absorption.
Description
technical field [0001] The invention relates to the preparation of a material for auto parts, in particular to a preparation method for using expanded perlite to make a liner for an automobile exhaust gas purifier. Background technique [0002] With the development of the automobile industry, automobile exhaust has become a mobile pollution source in the atmosphere. One of the most convenient, feasible and effective measures in the prevention and control of automobile exhaust pollution is to install purifiers. The automobile exhaust purifier is mainly composed of a metal shell, a buffer layer and a honeycomb carrier. Elastic composite pads are a good material for the buffer layer of purifiers, usually made of fibers, adhesives and expandable materials. [0003] The liner is installed between the metal shell and the ceramic honeycomb body, covering the outside of the ceramic honeycomb body. Due to the expansion material, its thickness increases with the increase of the amb...
Claims
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IPC IPC(8): C04B26/16C04B24/26C04B20/10C04B20/02F01N3/28
CPCC04B20/023C04B20/1037C04B24/2641C04B26/16F01N3/2857F01N3/2871C04B14/185C04B14/042Y02A50/20
Inventor 徐道际张建波张成文邓书醒肖杰
Owner ANHUI HONGSHI OPTOELECTRONICS HIGH TECH CO LTD