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Method for manufacturing honeycomb formed article, method for manufacturing honeycomb filter, and honeycomb filter

A manufacturing method and technology of molded bodies, applied in the field of methods, can solve problems such as difficulty in applying dust collection filters, strength decline, etc., and achieve the effects of less internal defects, prevention of internal defects, and high strength

Inactive Publication Date: 2009-08-12
NGK INSULATORS LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, high porosity will lead to a decrease in strength, so it is difficult to apply to dust collection filters such as the above-mentioned DPF

Method used

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  • Method for manufacturing honeycomb formed article, method for manufacturing honeycomb filter, and honeycomb filter
  • Method for manufacturing honeycomb formed article, method for manufacturing honeycomb filter, and honeycomb filter
  • Method for manufacturing honeycomb formed article, method for manufacturing honeycomb filter, and honeycomb filter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0124] [Manufacture of honeycomb molded body]

[0125] (molding raw material)

[0126] As raw materials for aggregate particles, 40% by mass of talc (average particle size 21 μm), 18.5% by mass of kaolin (average particle size 11 μm), 14.0% by mass of alumina (average particle size 7 μm), aluminum hydroxide (average A cordierite-forming raw material mixed at a ratio of 15% by mass of a particle diameter of 2 μm) and 12.5% ​​by mass of silica (average particle diameter of 25 μm). In addition, 25.0 parts by mass of carbon (coke: average particle size: 27 μm) as the first pore-forming material and 25.0 parts by mass of polyethylene terephthalate as the second pore-forming material were prepared with respect to 100 parts by mass of the aforementioned aggregate particle raw material. 10.0 parts by mass of ester resin (average particle diameter: 37 μm), 8.0 parts by mass of hydroxypropylmethylcellulose as a binder. Further, 0.01 parts by mass of fatty acid soap (potassium laurate)...

Embodiment 2、3

[0156] A honeycomb formed body was produced in the same manner as in Example 1 except that the ratio of the surfactant in the molding raw material was set to 0.1 mass part (Example 2) and 1 mass part (Example 3). The honeycomb filter was manufactured, and each evaluation was performed in these processes. The results are shown in Table 1.

Embodiment 4

[0158] As the aluminum hydroxide of the molding raw material, aluminum hydroxide surface-modified with stearic acid was used, and the ratio of the surfactant in the molding raw material was set to 0.1 parts by mass, in the same manner as in Example 1. The honeycomb formed body was manufactured, and the honeycomb filter was manufactured from the obtained honeycomb formed body, and each evaluation was performed in these processes. The results are shown in Table 1.

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Abstract

The present invention provides a method for producing a honeycomb formed body, which comprises the steps of mixing (first mixing) two or more aggregate particle raw materials to obtain a molding complex (dry powder), and then adding water to mix (second mixing) There is a mixing step to obtain a molding compound (wet powder), and a kneading step to obtain clay by kneading the molding compound (wet powder). The manufacturing method of the honeycomb formed body can easily prevent the occurrence of internal defects without complicating the steps or complicating the work.

Description

technical field [0001] The present invention relates to, for example, a method for manufacturing a honeycomb molded body suitable for manufacturing dust collection and water treatment filters, a method for manufacturing a honeycomb filter, and a honeycomb filter. A method of manufacturing a honeycomb formed body capable of improving internal defects, a method of manufacturing a honeycomb filter, and a honeycomb formed body excellent in filtration performance (collection efficiency). Background technique [0002] In various fields including chemical, electric power, steel, industrial waste treatment, etc., filters for dust collection and water treatment are used for environmental protection such as pollution prevention, and for recovering products from high-temperature gases. A porous honeycomb structure made of ceramics with excellent properties, corrosion resistance, and mechanical strength. For example, a porous honeycomb structure made of ceramics is used in a dust colle...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B28B17/02B01D46/00B28B3/26F01N3/022
Inventor 野口康平井贞昭森慎也市川结辉人岩渕宗之
Owner NGK INSULATORS LTD
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