JPH0733081A - Oil adsorbent material - Google Patents

Abstract

PURPOSE:To provide oil absorbent material causing no pollution of natural environment nor the generation of harmful gas even during burning. CONSTITUTION:Reinforcing cotton nets 2 and the foam bodies 3 of vinylidene chloride resin for imparting buoyancy are put between mats 1, 1 formed of unwoven fabric made of natural fiber with cellulose as main substance, thus forming oil adsorbent material 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oil adsorbent, and more particularly to an oil adsorbent that does not pollute the natural environment and that does not generate harmful gas even during combustion.

[0002]

2. Description of the Related Art Conventionally, oil adsorbents have been used to protect the ocean, harbors, or rivers from oil pollution in the event of oil tanker distress, oil-containing wastewater or oil spill accidents from factories / ships, etc. The oil floating on the water surface is collected.

Such an oil adsorbent is "a performance test standard of the oil adsorbent based on the type approval system" because of the importance of its purpose of use.
, And various oil adsorbents satisfying the standard are currently on the market.

Here, many of the oil adsorbents that are currently on the market, even after the use of the oil adsorbent (after absorbing oil),
Polypropylene with a specific gravity lighter than water (specific gravity: approx. 0.9
), Many are made of synthetic resin such as polyurethane foam.

However, since these synthetic resins such as polypropylene do not have a natural purifying action and there is a risk of causing pollution of plastics, the oil adsorbent using such synthetic resin as a raw material is discarded as it is. Moreover, when burned, the burning temperature is high, so a special incinerator is required, and there is a concern that harmful gas is generated during burning.

The present invention has been made in view of the problems of the above-described oil adsorbent using a synthetic resin such as polypropylene that has been conventionally used, and its object is to prevent pollution of the natural environment. Moreover, it is to provide an oil adsorbent that does not generate harmful gas even during combustion.

[0007]

In order to achieve the above object, the present invention provides an oil adsorbent in which a non-woven fabric of natural fibers mainly containing cellulose contains expanded beads for imparting buoyancy.

Further, in the present invention, the above-mentioned non-woven fabric of natural fibers mainly composed of cellulose is used as an oil adsorbent reinforced by a cotton net.

[0009]

According to the above-described oil adsorbent according to the present invention, since the non-woven fabric of natural fibers mainly composed of cellulose having a specific gravity heavier than water is made to include the foam beads for imparting buoyancy, Even after using the oil adsorbent (after absorbing the oil), the mat does not sink in water and can be easily recovered.

Further, since the oil adsorbent according to the present invention is a natural fiber mainly composed of cellulose, even if there is an oil adsorbent that could not be recovered, the oil adsorbent is naturally Cleans up and does not lead to environmental pollution,
Further, even when the oil adsorbent is burned, the burning temperature is low, so that no special incinerator is required and no harmful gas is generated during burning.

Further, according to the above-described oil adsorbent according to the present invention, since the non-woven fabric of the above-mentioned natural fiber mainly containing cellulose is reinforced by the cotton net,
At the time of collecting the oil adsorbent, it does not break even when hooked with a hook or the like, and since the net is formed of cotton fibers which are natural fibers like cellulose, it is also an oil adsorbent that does not pollute the natural environment. Become.

[0012]

EXAMPLES The present invention will be described in more detail below with reference to examples of the present invention.

Here, FIG. 1 is a partially cutaway perspective view showing an embodiment of the oil adsorbent according to the present invention, and FIG. 2 is a line A--A of FIG.
It is an expanded sectional view of a portion along a line. 3 is a conceptual diagram showing an example of the method for producing an oil adsorbent according to the present invention, and FIG. 4 is an enlarged conceptual diagram showing the main parts of FIG.

In the figure, reference numeral 1 is a mat formed from a nonwoven fabric of natural fibers mainly composed of cellulose obtained from wood, and the mat 1 is bulky and has a low density and is formed into an extremely porous mat. Has been done.

10 m between the two mats 1 and 1
55 × 55 × 0.2 as a whole is sandwiched between the cotton net 2 formed in the m-th line and the foamed body 3 of vinylidene chloride resin foamed about 40 times while being fixed by an adhesive.
It is formed on the oil adsorbent 4 of 5 cm.

The cotton net 2 sandwiched between the two mats 1 and 1 is inserted to reinforce the mat 1 and the oil adsorbent formed by the presence of the cotton net 2 Even when the oil adsorbent 4 is hooked by a hook at the time of recovery after use, the oil adsorbent 4 does not break.

Further, the foam 3 of vinylidene chloride resin, which is present in an impregnated state between the mats 1 formed of a nonwoven fabric of natural fibers, gives buoyancy to the formed oil adsorbent 4, Even after the oil adsorbent 4 has absorbed oil, the oil adsorbent can be easily recovered without sinking in water.

Next, an example of a method of manufacturing the oil adsorbent 4 having the above structure according to the present invention will be described with reference to FIGS. 3 and 4.

As shown in FIG. 3, for example, the pulp P continuously fed from the take-up 10 of bleached kraft pulp of softwood is kneaded by a corrugated roll 11 and further fixed by a feeder roll 12. The quantity is continuously transferred,
From the inlet 13 of the defibrator, it is guided to the crushing defibrator 14.

In this crushing defibrator 14, the defibrated pulp P is appropriately defibrated, passed through a screen plate 15 with large holes, and guided to the next-stage defibrating defibrator 16. This defibrating defibrator 16 has the effect of sucking the fibers sent out from the screen plate 15 of the crushing defibrating device 14, and blows the fibers defibrated by the defibrating defibrating device 16 to the air blowing duct 17. It is an effective defibrating machine.

The defibrated fibers sent from the refining defibrating machine 16 to the air blowing duct 17 pass through the air blowing duct 17 and are blown to the defibrating / dispersing device 18. In the defibration / dispersion device 18, the binding fibers are appropriately defibrated by the action of the metal blades 19, and combined with the air blown from the air blowing port 20, are smoothly and continuously blown out from the screen 21, and the suction portion is rearward. The fiber deposits T are continuously formed on the endless wire net 23 by the suction box 22 having.

The fiber deposit T continuously formed on the endless wire net 23 is transferred in the direction of the arrow, and when it is transferred to the suction box 24 having a suction part at the rear, it is provided above it. The adhesive is sprayed uniformly on the fiber deposit T from the adhesive spraying device 25 in the width direction and the vertical direction.

The fiber deposit T on which the adhesive has been dispersed is then dried by the hot air dryer 26 to produce a low density and very porous nonwoven fabric A. The manufacturing steps up to this point can be carried out in the same manner as the manufacturing of the non-woven fabric used in conventionally known tobacco filters.

Thereafter, the nonwoven fabric A is transferred onto the second endless wire net 29 by the action of the suction box 27 and the pressing roller 28, and when it is transferred to the position of the suction box 30, the adhesive provided above it. From the agent spraying device 31, the adhesive is again sprayed on the nonwoven fabric A uniformly in the width direction and the vertical direction.

In the transfer direction of the non-woven fabric A on which the adhesive is sprinkled, as shown in detail in FIG. 4, the non-woven fabric B is wound separately 32 by the same production method as described above, and the cotton net 2 is The non-woven fabric B and the cotton net 2 are continuously fed out from the winding 33, and during the feeding of the non-woven fabric B, a thermally foamable resin, for example, a low-boiling-point hydrocarbon is subjected to in-situ polymerization method such as vinylidene chloride or acrylonitrile. A device 34 for spraying the resin microencapsulated by the shell wall of the copolymer is provided, and the thermally foamable resin is uniformly sprayed on the nonwoven fabric B by the device 34.

The non-woven fabric A sprinkled with the adhesive and the non-woven fabric B sprinkled with the heat-foaming resin, with the cotton net 2 sandwiched therebetween, immediately after being transferred onto the third endless wire net 35, It is pressure-bonded by the pressure-bonding roll 36, and then sent to the hot air dryer 37.

In the hot-air dryer 37, the adhesive is dried, the foaming of the heat-foaming resin is carried out, and then the resin is cut into a space between the mats 1 and 1 formed of the natural fiber nonwoven fabrics A and B. The above-mentioned oil adsorbent 4 according to the present invention is produced in which a cotton net 2 for reinforcement and a foam 3 for imparting buoyancy are sandwiched between the oil adsorbent 4 and the oil adsorbent 4.
Satisfies the above-mentioned “performance test standard for oil adsorbents based on the type approval system”.

Although one embodiment of the oil adsorbent according to the present invention and one example of its manufacturing method have been described above, the present invention is not limited to the above-described embodiments and its manufacturing method. Various modifications and changes can be made based on the technical idea of the invention.

[0029]

As described above, according to the above-described oil adsorbent of the present invention, the foamed beads for imparting buoyancy are included in the nonwoven fabric of natural fiber mainly composed of cellulose having a specific gravity heavier than water. Since it is a product, it is possible to provide an oil adsorbent that can be easily recovered without sinking in water even after using the oil adsorbent (after absorbing oil).

Further, since the oil adsorbent according to the present invention is made of natural fiber mainly composed of cellulose, even if there is an oil adsorbent which could not be recovered, the oil adsorbent is naturally Cleans up and does not lead to environmental pollution,
Further, even when the oil adsorbent is burned, the combustion temperature is low, so no special incinerator is required, and there is no concern that harmful gas will be generated during combustion. We can provide wood.

[Brief description of drawings]

FIG. 1 is a partially cutaway perspective view showing an embodiment of an oil adsorbent according to the present invention.

FIG. 2 is an enlarged cross-sectional view of a portion taken along the line AA of FIG.

FIG. 3 is a conceptual diagram showing an example of a method for producing an oil adsorbent according to the present invention.

FIG. 4 is a conceptual diagram showing an enlarged main part of FIG.

[Explanation of symbols]

 1 Mat made of non-woven fabric of natural fiber 2 Cotton net for reinforcement 3 Foam for imparting buoyancy 4 Oil adsorbent

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takio Miura 1-5-7 Kajicho, Chiyoda-ku, Tokyo Suzuei Co., Ltd. (72) Inventor Masaetsu Akashi 1-5-7 Kajimachi, Chiyoda-ku, Tokyo No. Suzuei Co., Ltd.

Claims (2)

[Claims] 1. An oil adsorbent, characterized in that foamed beads for imparting buoyancy are included in a non-woven fabric of natural fibers mainly composed of cellulose. 2. The oil adsorbent according to claim 1, wherein the non-woven fabric of natural fibers mainly composed of cellulose is reinforced with a cotton net.