JPH044010A - Filter medium for oil filter for internal combustion engine - Google Patents

Abstract

PURPOSE:To efficiently remove carbon particles and to eliminate the outflow of inorg. matter being in danger of damaging an internal combustion engine by filtering a lubricating oil with a filter medium consisting of org. fine fibers and common fibers. CONSTITUTION:This filter medium is formed with org. fine fibers and common fibers (e.g. rayon). The org. fine fiber contains a carbon whisker having <=1mu diameter and <=100mum length and contg. >=90% carbon. The fiber content of the filter medium is preferably controlled to 50-98% and the org. fine fiber content to 2-50%. For example, 95 parts of linter pulp is added to a beater filled with water to about 1% concn., macerated and beaten, 5 parts of carbon whisker and 1% PVA fiber based on the raw material are added and uniformly agitated, and the water content is adjusted to obtain a 0.5% sheet making raw material. A sheet having 250g/m<2> dry weight and 0.5mm thickness is obtained from the raw material. A lubricating oil is filtered by this filter medium to efficiently remove carbon particles, and the outflow of inorg. matter is eliminated.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a furnace material for an oil filter used in an internal combustion engine.

(Prior Art) In internal combustion engines, carbon particles are generated due to incomplete combustion, resulting in problems such as increased viscosity of lubricating oil, poor engine lubrication, and shortened lifespan of lubricating oil. Therefore, in order to remove carbon particles, cellulose fibers or furnace materials made of a mixture of cellulose fibers and potassium titanate whiskers are used in various shapes. However, these furnace materials are insufficient in their ability to remove carbon particles, and furnace materials mixed with potassium titanate whiskers cannot avoid outflow of the potassium titanate whiskers, which may damage the engine.

(Problem H to be Solved by the Invention) There is a strong desire for a furnace material that does not cause engine damage in internal combustion engines and has excellent carbon particle removal ability. In view of this point, the present invention provides a material that has excellent carbon particle removal ability and does not cause inorganic substances that may cause engine damage to flow out.

(Means for Solving the Problems) As a result of intensive research, the present inventors have found that carbon particles can be efficiently removed by using a new furnace material made only of organic fine fibers and fibers to treat lubricating oil. The present inventors have discovered that this is a material that does not leak out inorganic substances, and has come up with the present invention. That is, the furnace material of the present invention is a novel material using organic fine fibers and fibers.

The organic fine fibers, which are the constituent elements of the present invention, are carbon whiskers and play an important role in the purpose of the present invention.

The fibers that are the constituent elements of the present invention are fibers such as acrylonitrile fibers, PVA fibers, wood pulp, linter pulp, rayon, and polyester, and any fibers that can be used to make paper can be used. Wood pulp and linter pulp are preferably used from the viewpoint of paper-making properties.

When producing a sheet using a wet method, one or more of these fibers are mixed and used after adjusting the degree of beating, fiber length, and degree of fibrillation.

The lumber of the present invention is manufactured by the following procedure.

A predetermined amount of fiber is added and dispersed in a beater filled with water.

After lowering the beater blade and adjusting to the desired degree of beating, carbon whiskers are added and mixed uniformly.

In this case, it is also possible to add a papermaking dispersant such as a surfactant to improve the dispersibility of the fibers.

Using this raw material for papermaking, paper is made and dried in a conventional manner to obtain a desired furnace material.

The preferred content ratio of each component of the wood is 50 to 98% fiber;
The organic fine fibers range from 2 to 50%.

The thickness of the wood of the present invention is preferably about 0.2 to 1 mm.

If it is too thin, the liquid permeation channel will be too short, and the removal of carbon particles will tend to be incomplete; if it is too thick, there will be problems with workability during pleating.

In order to improve the paper strength of the furnace material of the present invention, it is possible to add a commonly used paper strength enhancer and to coat it with a thermosetting resin as post-processing.

In order to improve the strength of the wood of the present invention, non-woven fabric, filter paper, etc. can be attached to the secondary side of the wood by gluing or hot melting.

When the wood of the present invention is used as an oil filter for an internal combustion engine, it can be processed into a shape suitable for the purpose, such as a chrysanthemum shape or a laminated type.

Hereinafter, furnace material manufacturing examples and test examples will be specifically described.

(Example-1) 95 parts of linter pulp was added to a beater filled with water to a concentration of about 1%, and after disintegration and beating, carbon whisker 5
After adding PVA fiber at a ratio of 1% to the raw material and stirring uniformly, the moisture content was adjusted to obtain a 0.5% papermaking raw material. Using this papermaking raw material, dry weight 250g/r+? , thickness 0
．． A sheet of 5a+m was obtained.

(Example-2) 65 parts of linter pulp, 35 parts of carbon whisker, P
The dry weight of VA fiber was 240 g/rrf and the thickness was 0.5 sa by the same operation as Example 1 using a composition of 1% based on the raw material.
I got a + sheet.

(Comparative example = 1) Using linter pulp and PVA fiber at a composition of 1% of the raw material, the dry weight was 260 g/rrr in the same manner as in Example-1.
A sheet with a thickness of 0.5 mm was obtained.

(Comparative Example-2) 65 parts of linter pulp, 35 parts of potassium titanate fiber,
A sheet having a dry weight of 240 g/bo and a thickness of 0.5 mm was obtained using the same procedure as in Example 1 using PVA fibers at a composition of 1% based on the raw material.

(Waste oil was over-tested) Waste oil was applied to the lumber obtained in Examples and Comparative Examples under the following conditions at 7 houses, and its removal efficiency was examined.

Test condition 1) Liquid used: Waste oil 2) Overpressure 4. Okg/cry.

3) Effective area is 19.0 cTA 4) Flow temperature Room temperature 5) Measurement is the amount of contamination in the liquid and stock solution (measured by gravimetric method) 6) Efficiency measurement method Efficiency (%) = (1-P liquid contamination Concentration / Contaminant concentration of raw solution) x 100 Results (Effects of the invention) As explained in detail above, the present invention has produced a highly efficient charcoal material with no outflow of inorganic substances, which could not be obtained with the conventional technology, and it has become a big hit in the industry. The benefits are enormous.

Claims (2)

[Claims] (1) A filter material for an oil filter for an internal combustion engine, characterized by comprising organic fine fibers and fibers. (2) Organic fine fibers have a diameter of 1 μm or less and a length of 100 μm
The filter material for an oil filter for an internal combustion engine according to claim 1, characterized in that it contains carbon whiskers having a carbon content of 90% or more.