JPH01139115A - Engine oil filter - Google Patents

Abstract

PURPOSE:To mechanically collect metallic particles and, at the same time, to adsorb and remove carbon particles by mixing zeolite fiber with other fibers to form the filter for engine oil. CONSTITUTION:For the engine oil filter used in automobile, etc., sepiolite fiber is mixed with other fibers, such as glass fiber and synthetic fiber, and added with a small amount of binder to combine each fiber to make into a sheet shape. The filter obtained by this method is allowed to mechanically collect metallic particles while the oil passes through the mixed fiber layer, and, at the same time, the carbon particles contained in the oil is adsorbed by the mixed sepiolite fiber. Consequently, this filter is useful as a filter capable of removing carbon particles.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an engine oil filter for automobiles and the like.

(Prior Art) As a conventional engine oil filter for automobiles, etc., filters made by mixing cellulose pulp and synthetic fibers are known.

(Problems to be Solved by the Invention) When automobile engine oil is passed through tj using the above conventional filter, the collection efficiency of metal particles and other insoluble component particles in the oil is less than 20%. The carbon particles contained in the oil cannot be collected, and repeated use will only increase the amount of carbon particles mixed in and cause contamination, making it unsuitable as an engine oil filter. .

(Means for Solving the Problems) The present invention provides an engine oil filter that can eliminate the drawbacks of the conventional engine oil filters and remove carbon particles contained therein. , made by mixing sepiolite fibers with other fibers.

(Function) The filter of the present invention can mechanically collect metal particles and the like while oil passes through the mixed fiber layer, and at the same time, the mixed sepiolite fibers can remove carbon particles contained in the oil. Since it is adsorbed, it effectively acts as a filter that can also remove carbon particles.

(Example) Next, examples of the present invention will be described in detail.

Automotive engine oil becomes contaminated with particles of insoluble components such as fine metal powder and fine carbon powder mixed into the oil due to abrasion of metal parts during the operating process of the engine. Since engine oil is a non-polar dispersion medium and carbon particles are also non-polar dispersoids, carbon particles have high compatibility with engine oil. Furthermore, the particle size of carbon particles is less than 1.0 μm.In conventional automobile engine oil filters, carbon particles pass through the fine network of the paper fibers, and removal by mechanical filtration is virtually impossible. This is impossible, and the undissolved particles that can be collected by this filter are limited to particles that are incompatible with oil, such as metal particles and inorganic particles, and the pressure that can be used to mechanically collect such particles is almost the same. Ta. As a result, it was not possible to remove carbon particles (usually particle size of a05 to 1.0μ) from the oil, and the product could not be used for a long period of time.The present inventor focused on sepiolite W4 male, which is a natural mineral fiber. However, it was discovered that if this was mixed with other fibers and made into a sheet, a filter capable of removing various insoluble component particles including carbon particles could be obtained. Generally, fibers have an average fiber diameter of about 100 mm, and have countless micropores on their surface, and the surface area per unit is extremely large, and tests have shown that the average fiber diameter is α01 ~
It was found that those having a diameter of 1 μm and a length of 1 μm to several micrometers were able to adsorb carbon particles well.

An example of the g&wear test will be explained next.

Test Example Sepiolite fibers 22.59 and 109 having an average fiber diameter of 101 μm were added to contaminated automobile engine oil 509 containing 1 weight percent of carbon particles by cL, stirred, and left at 25°C for 12 hours. p overj
The fibers were removed and the presence or absence of carbon particles remaining in the p liquid was measured. Similarly, sepiolite fibers having an average fiber diameter of 11 μm were similarly placed in 50 g of the oil and adsorption treatment was performed in the same manner as above, and then the fibers were separated and the remaining carbon particles were removed from the p liquid. The presence or absence was measured. The results were as shown in Table 1 below.

Table 1 As is clear from the above table, sepiolite fibers have an adsorption and collection effect on carbon particles, and particularly when the average fiber diameter is 1 μm or less, they have a remarkable VH adsorption and collection effect.

Next, specific examples of the present invention will be described.

Example 1 Average fiber diameter [LO1 μ bird sepiolite fiber 5%, average fiber diameter (LSI island glass fiber 65%, fiber length 5111
A suspension water created by adding and mixing 30% of sI polyester monofilament to water was mixed with 1% of fibrillated cellulose pulp as a binder based on the total amount of these ingredients, and then paper was made using a normal paper machine. ,
After drying, an automobile engine oil filter having a basis weight (tsubo fit) of 100 g/m was produced.

Example 2 Sepiolite fiber and glass 1, which are the same raw materials as Example 1
After adding and mixing a male and synthetic fibers to water at a mixing ratio of 50:20:50 to create a suspension water, the suspension water was treated in the same manner as in Example 1, and the suspension was treated in the same manner as in Example 1.
/rrj automobile engine oil filter was manufactured.

Comparative Example The same raw materials as Example 1, glass fiber and synthetic fiber, were
After adding and mixing to water at a mixing ratio of 0:30 to create a suspension water, the suspension water was treated in the same manner as in Example 1 to obtain tsuboffi.
A filter for automobile engine oil of 1009/ml was manufactured.

The carbon particle collection efficiency (
The results of measuring various characteristics such as (5) are shown in Table 1 below.
Shown below.

Table 1 Note that in filters made by adding a tetradactyl compound such as phenolic resin instead of fibrillated cellulose as a binder, the surface of the sepiolite fibers is coated multiple times, resulting in a decrease in adsorption and collection efficiency. Therefore, it is preferable to use thin fibers such as fibrillated cellulose as a binder. If resin is used as a binder, please limit it to 5%.

Note that the pressure loss of the filter is preferably 3000 msAq or less, and the filter of the present invention can satisfy this requirement in this respect. As a result of many test studies, the preferred formulation for an engine oil filter is 5-50% sepiolite, average fiber diameter I12-1μ [optimal (α3-
α7μ bird)] glass fiber of 20 to 65%, synthetic fiber monofilament of 20 to 30%, and fibrillated cellulose of several %, each of which is selected and blended so as to be 100%. A blend of 50% or more sepiolite will result in a decrease in F aqueous content and an excessive pressure loss.
With a composition of 0% or less! It is common to

Sepiolite fibers and glass fibers are both inorganic fibers, so a filter made only of them has poor assembly workability. To improve this, it is effective to mix short or long synthetic fibers. It is effective to blend beaten fibrillated fibers with a fiber diameter of 15μ square.

Furthermore, the strength of the filter of the present invention can be improved by laminating it with a reinforcing material such as a polyester nonwoven fabric, and the efficiency of collecting particles other than carbon can be reduced.

(Effects of the Invention) As described above, according to the present invention, since sepiolite fibers are mixed as an engine oil filter, the effect of adsorbing and removing carbon particles in the oil is also enhanced.

Patent applicant Nihon Muki Co., Ltd.

Claims (1)

[Claims] 1. An engine oil filter comprising sepiolite fibers mixed with other fibers. 2. The filter according to claim 1, which is formed by binding mixed fibers of sepiolite fibers, glass fibers, and synthetic fibers to each other with a small amount of a binder.