JPH0221915A - Filter for engine oil - Google Patents

Abstract

PURPOSE:To obtain the filter for engine oil which remove the carbon particles in engine oil by blending potassium titanate fibers and other fibers, thereby forming the filter for engine oil. CONSTITUTION:The fibers which are the single crystal whiskers composed of K2Ti6O13, have the crystal structure forming the tunnel structure with 3 pieces of the octahedrons of TiO6 copossessing a ridge to be continuous as one set and to parallel with the (b) axis, have a large surface area per unit weight, and have 0.2-0.5mum fiber diameter and 10-20mum fiber length are used as the potassium titanate fibers. Vegetable fibers consisting of cellulose, etc., inorg. fibers consisting of glass, etc., and synthetic fibers consisting of vinylon, etc., are used as the fibers to be blended. The compounding ratio of both is preferably 20-40%:80-60%. The carbon particles in the engine oil are adsorbed to the potassium titanate fibers and fine metal powder, etc., are mechanically captured by the blended fiber layers.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a filter for engine oil for automobiles, etc.

(Conventional technology) Conventionally, as a filter for engine oil of automobiles, etc.,
Filters made of a mixture of wood pulp and synthetic fibers having a fiber diameter of 10 μm or more are known.

(Problems to be Solved by the Invention) When engine oil is filtered using the conventional engine oil filter, metal fine powder, white metal fine powder such as carbon particles, etc. floating in the engine oil are collected and removed by the filter. However, since carbon particles are non-polar dispersoids, they have high compatibility with engine oil, which is a non-polar dispersion medium, and the particle size of carbon particles is 1.0 μm or less. And because it has good dispersibility, when filtered with a filter, the carbon particles in the engine oil pass through the fine mesh of the filter's fibers, making it extremely difficult to collect and remove carbon particles with mechanical filtration alone. There is a problem.

The present invention aims to solve these problems and provide an engine oil filter that can remove carbon particles contained in engine oil.

(Means for Solving the Problems) As a result of intensive research to achieve the above object, the present inventor found that among various fibers, potassium titanate fibers adsorb carbon particles well.

The present invention was made based on the above findings, and
It is characterized by a mixture of potassium titanate fiber and other fibers.

For example, the potassium titanate fiber used in the present invention has a composition of 2 T! 6013 single crystal whisker, its crystal structure consists of three Tie6 octahedrons that share an edge and are connected as a set, forming a tunnel structure parallel to the b axis, with a large surface area per unit weight and a small fiber diameter. is 0.2~0.
The fiber length is about 5 μm, and the fiber length is about 10 to 20 μm.

The fibers to be mixed with the potassium titanate fibers include vegetable fibers such as cellulose, inorganic fibers such as glass, and synthetic fibers such as vinylon resin and polyester resin. #m or O15~2 denier, and fiber length is 0
．． It is about 1 to 5 u.

The blending ratio of the potassium titanate fibers and the fibers with the above properties is about 10 to 60%:90 to 40%, preferably 20 to 40%, from the viewpoint of low pressure loss, long life, and high collection efficiency of the filter. :80 to 60%.

In addition, when a conventional resin binder such as phenolic resin is used to increase the strength of the filter, the binder coats the surface of the potassium titanate fibers and reduces the adsorption effect of carbon particles. It is appropriate to use a fiber binder instead of a binder, and this method includes, for example, using fibers with a diameter of 0.1 to 0.5.
There are a method of entangling fibrillated cellulose fibers beaten to μm, a method of heat-sealing the synthetic fibers when mixed with synthetic fibers, a method of bonding reinforcing materials such as polyester nonwoven fabrics, and the like.

In order to investigate the adsorption rate of carbon particles on fibers, the following experiment was conducted.

For 50g of contaminated automobile engine oil containing 0.1% by weight of carbon particles, the average fiber diameter is 0.3μ.
Ig, 2.5 g, and 5 g of potassium titanate fibers with a fiber length of 10 to 20 μm were added, stirred thoroughly, and left at a temperature of 25°C for 12 hours, and then filtered to remove the potassium titanate fibers. The amount of carbon particles remaining in the removed filtrate was measured. The measurement results are shown in Table 1. For comparison, 5 g each of wood pulp (NBKP) fibers, linter pulp fibers, and polyester fibers with an average fiber diameter of 20 μm and a fiber length of 0.1 to 5 mm were added to 50 g of the engine oil. After performing the same adsorption treatment as above, the amount of carbon particles remaining in the filtrate was measured. The measurement results are shown in Table 1.

Table 1 As is clear from Table 1, the potassium titanate fibers significantly adsorbed carbon particles in the engine oil. In contrast, wood pulp (NBKP) fibers, linter pulp fibers, and polyester fibers did not adsorb any carbon particles. Therefore, it was confirmed that potassium titanate fibers have an excellent adsorption effect on carbon particles.

(Function) A filter made of a mixture of potassium titanate fibers and other fibers adsorbs carbon particles in the engine oil with the potassium titanate fibers while the engine oil passes through it, and also removes fine metal powder etc. with the mixed fiber layer. to collect.

(Example) Next, specific examples of the present invention will be described together with comparative examples.

Example 1 Potassium titanate fiber 2096 with an average fiber diameter of 0.3 μm and a fiber length of 10 to 20 μm, an average fiber diameter of 0.5 μm
40% glass fiber with a fiber length of 0.1 to 2 m and 40% cellulose fiber with an average fiber diameter of 20 μm and a fiber length of 0.1 to 21 m are put into a pulper, and water is added and mixed. The average fiber diameter of II
Fibrillated cellulose fibers of Im were added in an amount of 1% based on the total amount of these blended materials, and were made into paper using a normal paper machine and dried to create a filter with a basis weight (tsubo ff1) of 100 g#.

Various characteristics such as carbon capture efficiency of the created filter were measured. The measurement results are shown in Table 2.

Measurement Conditions ■ Carbon Collection Efficiency After filtering 50 g of actual vehicle waste oil with a carbon particle concentration of 1.8w1% at a filtration temperature of 80° C., the amount of carbon particles remaining in the filtrate was measured.

(2) Measurement of pressure loss was carried out by passing air through a filter with a surface area of 19.6 d at a flow rate of 1 o 1/min and a surface velocity of 50/sec.

Example 2 40% potassium titanate fibers with an average fiber diameter of 0.3 μm and a fiber length of 10 to 20 μm, an average fiber diameter of 0.5 pm
30% glass fiber with a fiber length of 0.1 to 2 cm, 0.5
A filter was prepared in the same manner as in Example 1, except that 30% polyester monofilament with a denier and a fiber length of 5 was used.

In addition, various characteristics such as carbon trapping efficiency of the filter produced by the same method as in Example 1 were measured.

The measurement results are shown in Table 2.

Comparative Example 70% polyester monofilament with 0.5 denier and 5-fiber length and 30% linter pulp with average fiber diameter of 20 μm and fiber length of 0.5 to 2 cm were placed in a pulper, and water was added and mixed. The resulting suspension water is made into paper using a normal paper machine, dried, impregnated with 5% of the total amount of these blended materials with phenol resin as a binder, dried and cured to make a filter with a basis weight (tsuboji) of 330 g #. It was created.

In addition, various characteristics such as carbon trapping efficiency of the filter produced by the same method as in Example 1 were measured.

Its flllllllll is shown in Assessment 2.

Table 2 As is clear from Table 2, it was confirmed that the filters of Examples 1 and 2 of the present invention achieved high collection efficiency with significantly lower pressure loss than the filters of Comparative Examples.

(Effects of the Invention) In this way, the engine oil filter of the present invention mixes potassium titanate fibers with other fibers, so when the engine oil is filtered with the filter, the potassium titanate fibers are absorbed into the engine oil. Because it adsorbs carbon particles, these particles can be easily removed, and metal fine particles can be mechanically collected and removed while engine oil passes through the mixed fiber layer. Patent Applicant: Nippon Inuki Co., Ltd. Representative: Kingai Kitamura (3 persons)

Claims (1)

[Claims] An engine oil filter characterized by a mixture of potassium titanate fibers and other fibers.