JPH0227841Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention relates to a moisture-in-oil absorbent, and in particular, a moisture-in-oil absorbent with high lint-free properties that removes water that is not dissolved in oil and is in a dispersed state from oil. Regarding water absorbing materials.

[Conventional technology]

It has been widely known that super absorbent materials are effective in removing water from oil. However, at present, it is hardly put into practical use. The main reason for this is that conventional super absorbent materials have poor lint-free properties. In other words, there are refrigeration cycle refrigerants, lubricating oils for vacuum pumps, fuel oils for engines, etc. that require removal of water in oil, but any of these can cause serious trouble if solid impurities are mixed in. Since the system must be lint-free, it has not been put into practical use.

[Problem that the invention attempts to solve]

An object of the present invention is to provide a moisture-in-oil absorbent material with excellent lint-free properties.

[Means for solving problems]

The inventors of the present invention have found that the above-mentioned problems can be solved by completely covering a structure made of a fibrous superabsorbent material with a long fibrous structure, and have completed the present invention.

Hereinafter, specific examples of the present invention will be explained based on the drawings.

FIG. 1 is a partially cutaway plan view showing a specific example of the moisture-in-oil absorbent material of the present invention, and FIG. 2 is a sectional view taken along the line 4--4. Among such water-in-oil absorbers with excellent lint-free properties, super water absorbent 2
It is necessary that the fibrous super absorbent material is a fibrous super absorbent material, and that the fibrous super absorbent material is completely covered with the long fiber structure 1. If the superabsorbent material is a polymer powder, even if it is completely covered with a long fiber structure, the polymer will escape from the small gaps between the layers, causing clogging problems in refrigeration machines, engines, etc. Further, if the cover of the super absorbent material is a short fiber structure, problems may occur due to the short fibers used in the cover falling off. As seen in FIGS. 1 and 2, the peripheral edge of the long fiber structure 1 is sewn or glued (3 indicates the stitched or glued portion).

In the present invention, the water-in-oil absorber may have any shape as long as the fibrous superabsorbent material is completely covered with the long fiber structure. For example, it may have a disk shape as shown in FIG. 3, a hexagonal disk shape as shown in FIG. 4, or one with one end bent as shown in FIG. 5 and without adhesive or seam.

In the present invention, the fibrous superabsorbent material includes acrylic fibers containing carboxyl groups and partially carboxymethylated cellulose fibers in which some or all of the carboxyl groups are alkali metal ions such as sodium, potassium, and lithium. , or those substituted with ammonium ions are preferred.

Blending or twisting with other fiber materials as necessary, such as synthetic fibers such as acrylic fibers, polyester fibers, and polyamide fibers, regenerated cellulose fibers such as rayon and cupora rayon, and natural fibers such as cotton and wool. It is also possible to use , mixed knitting, and mixed weaving.

The structure of the fibrous superabsorbent material may be a web, a sheet-like material, a woven fabric, a knitted fabric, etc.; however, from the viewpoint of water retention, the structure is a web or sheet that has a loose structure (the web is needle-punched). (e.g., those that have been prepared) are preferred.

In the present invention, long-fiber structures include knitted fabrics, woven fabrics, etc. using synthetic fibers such as polyester, polyamide, and polyacrylonitrile, synthetic fibers such as rayon and cupora rayon, and semi-synthetic fibers such as acetate. Refers to spunbond and other nonwoven fabrics. Among these, spunbond is more preferable in terms of lint-free properties.

[Effect of idea]

By using the water-in-oil absorbent of the present invention, water in the system can be easily removed without any troubles caused by the superabsorbent material or fibers falling off.

[Brief explanation of the drawing]

The drawings show a specific example of the present invention, and FIG. 1 is a partially cutaway plan view of a rectangular moisture-in-oil absorber. Second
The figure is an enlarged sectional view taken along line 4-4 in FIG.
FIG. 3 is a partially cutaway plan view showing a disc-shaped water-in-oil absorber, and FIG. 4 is a partially-cutaway plan view showing a hexagonal disc-shaped water-in-oil absorber. FIG. 5 is a partially cutaway perspective view of a moisture-in-oil absorber with one end bent and the folded portion free of adhesive or seams. 6 is an enlarged sectional view taken along line 6-6 in FIG. 5. FIG. 1: long fiber structure, 2: structure made of fibrous superabsorbent material, 3: adhesive or sutured portion of long fiber structure, 5: folded portion.

Claims (1)

[Scope of utility model registration request] A water-in-oil absorbent material comprising a structure made of a fibrous superabsorbent material completely covered with a long fiber structure.