JPS58128117A - Filter paper - Google Patents

Abstract

PURPOSE:To obtain a filter paper having extremely high function of adsorbing dirty components, etc. for removing them, by manufacturing the filter paper by admixing drawsonite in pulp material. CONSTITUTION:Fine particles of dawsonite are admixed in pulp material, indicating a prescribed air-permeability to manufacture a integrated filter paper. Dawsonite has strong adsorptivity and also has deoxidizing and deodorizing properties, nonflammability, and degassing property. Accordingly, when dawsonite having such properties is admixed in the pulp material; oil filter, etc. made of such materials has a filtering function by its pulp material itself, and further, has other functions such as, adsorbing to remove dirty components, deoxidizing, and deodorizing. Therefore, its functions as a filter increase extremely. Further, when incinerated after being used, the dawsonite releases CO2 by its thermal decomposition, and further, it forms NaAlO, which captures toxic gas.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a filter paper suitable for forming a filter element, for example.

Conventionally, in this type of filter paper, a structure made of paper pulp is used as an effective filter, and dirt is filtered out by passing a liquid or the like through it. In addition to the filtration effect based only on such physical properties, activated carbon is also used to physicochemically adsorb dirt components for filtration. However, when activated carbon is used, it has drawbacks such as a limited ability to form fine particles and easy dirtiness during handling.

The present invention was developed in view of these points, and it is a filter paper that not only has good adsorption properties for removing dirt components, but also has high deacidification and deodorization properties, and also has the ability to trap toxic gases when incinerated. The purpose is to obtain.

In the present invention, fine dawsonite particles are integrated into a pipe material exhibiting a predetermined liquid permeability. Therefore, even though it looks like ordinary paper, it has an extremely high ability to adsorb and remove dirt components.

Reed, a natural mineral discovered by and named after DowlON, whose composition is NaAJl
, (OH)z COs ib, crystal state is orthorhombic a:
4:c=OA48:1:04) It forms a petal-like tuft consisting of 34 orthorhombic crystals. Dawsonite is often synthesized with various characteristics depending on the synthesis conditions, and is a white fine powder crystal with a large specific surface area. Therefore, it has particularly strong adsorption properties, and has deacidification, deodorization, flame retardancy, and smoke removal properties.

Also, looking at the chemical composition, Naz　O21J% A Bird O Lou 3 & 4% Cot　　　　　　　　303% -012J% It is.

In addition, when looking at the particle size distribution of dawsonite, which exhibits a lumpy shape, approximately 90% is concentrated in the range of 0 to 20μ, and among these,
and <Ks~10μ are the main components. Its roundness and surface area to weight ratio are extremely high, and it maintains its active state for a long period of time. It is a very light porous body with a porosity of 80 to 90%.

When dawsonite with these properties is used as a kerosene filter, oil filter, etc., which is strained into pulp material, in addition to the filtration action of the pulp material itself, it also adsorbs and removes dirt components and deoxidizes. After that, I deodorized it. Therefore, the function as a filter is greatly increased.

In addition, after use, dawsonite is subjected to combustion treatment, and at this time, dawsonite thermally decomposes and releases CO and also generates N#AjO, which also captures toxic gases.

Therefore, O-ite fine particles, which are less likely to be generated during combustion processing, are filtered and integrated, so in addition to the mechanical filtration action of the pulp material, the physicochemical adsorption, deodorizing, and deoxidizing properties of dawsonite. It also has the effect of cleaning the components that pass through the liquid, and suppressing the generation of toxic gases during combustion treatment.

Agent: Kazumoto, WF・ Knee・ Proof≧−1゛・′

Claims (1)

[Claims] A filter paper characterized in that fine dawsonite particles are incorporated into a pulp material forming a paper exhibiting a predetermined liquid permeability.