KR102576862B1 - Oil absorbent pad and method of manufacturing thereof - Google Patents

Abstract

The present invention relates to an oil absorbent cloth and a method of manufacturing the same, comprising: polyester fiber foam; Polypropylene fiber sheets laminated and bonded to the polyester fiber foam; and a water repellent coated on the polyester fiber foam and polypropylene fiber sheet.
According to the present invention, an oil absorption cloth with low moisture absorption rate and excellent oil absorption is provided.

Description

Oil absorbent pad and its manufacturing method {OIL ABSORBENT PAD AND METHOD OF MANUFACTURING THEREOF}

The present invention relates to an oil absorption cloth and a manufacturing method thereof, and more specifically, to an oil absorption cloth with low moisture absorption and excellent oil absorption, and a manufacturing method thereof.

In general, oil adsorbent fabric is widely used for disaster recovery related to oil spills, oil spill accidents that occur from ships operating in coastal waters, and oil pollution removal that occurs in various industrial fields.

As disclosed in Korean Patent Publication No. 10-1032121, existing oil absorbent fabrics are manufactured by wrapping feathers of ducks, geese, chickens, etc. in mesh nets or bags, or by mixing feathers and synthetic yarns to make non-woven fabrics.

Recently, problems such as supply and demand of feathers have been resolved by manufacturing oil absorption cloth using polypropylene resin. That is, the oil absorption cloth was manufactured by molding polypropylene resin using the melt blown method and fusing the cover with heat, high frequency, or ultrasonic waves. The related prior art is Korean Patent Publication No. 10-1903145. The prior art manufactures an oil absorption cloth by molding the adsorption unit using the melt brown method and laminating the cover to the adsorption unit using ultrasonic waves from a fusion machine.

Korean Patent Publication No. 10-1032121 Korean Patent Publication No. 10-1903145

The purpose of the present invention is to provide an oil absorbent cloth with low moisture absorption and excellent oil absorption, and a method for manufacturing the same.

The technical problems to be solved by the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art from the description below. You will be able to.

The oil absorption cloth of the present invention for achieving the above object includes polyester fiber foam; Polypropylene fiber sheets laminated and bonded to the polyester fiber foam; and a water repellent coated on the polyester fiber foam and polypropylene fiber sheet.

More specifically, the polyester fiber foam may be composed of 10 to 30% by weight of 6 denier polyester fiber and 70 to 90% by weight of 20 denier polyester fiber.

The method for manufacturing oil absorbent cloth of the present invention includes a first step of mixing polyester fibers of different thicknesses; A second step of making polyester fiber foam from the mixed fibers and laminating polypropylene fiber sheets on the polyester fiber foam; A third step of making an absorbent fabric by combining the polyester fiber foam and the polypropylene fiber sheet; And a fourth step of coating the absorbent fabric with a water repellent containing wax.

More specifically, in the first step, 10 to 30% by weight of 6 denier polyester fiber and 70 to 90% by weight of 20 denier polyester fiber may be mixed.

The water repellent may be formulated to contain 10 to 15% by weight of the wax based on the total weight.

According to the present invention, an oil absorption cloth with low moisture absorption rate and excellent oil absorption is provided.

Figure 1 is a view showing the side view of the oil absorption cloth of the present invention with a portion of the polypropylene fiber sheet separated from the polyester fiber foam.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings. Detailed descriptions of well-known functions and configurations that may unnecessarily obscure the gist of the present invention are omitted.

The oil absorption cloth of the present invention is made by going through a mixing process in which polyester fibers with different deniers (thickness) are put into a hopper and mixed, and a carding process in which polyester fibers are arranged as if combing after going through a blending process. In order to control the size and thickness of the carding process and the listed polyester fibers, the polyester fiber foam (10) in the form of a fiber web is spread and overlapped to form (lapping) the polyester fiber foam (10) in the form of a fiber web (10). ), a process of laminating polypropylene fiber sheets (20), a needle punching process of binding and laminating polyester fiber foam (10) and polypropylene fiber sheets (20), and an ironing process to even out the surface. It is manufactured by going through the ironing process, metal detecting process, and wrapping process to create absorbent fabric, coating the absorbent fabric with a water repellent agent, and then drying it.

The oil absorption cloth of the present invention manufactured through this process consists of a polyester fiber foam (10), a polypropylene fiber sheet (20) that is laminated and laminated on the polyester fiber foam (10), and a polyester fiber foam (10). And it consists of a water repellent coated on the polypropylene fiber sheet (20).

The polypropylene fiber sheet 20 is made of polypropylene fiber, and since polypropylene fiber has superior strength and elongation than polyester fiber, the polypropylene fiber sheet 20 forms a base layer and forms a polyester fiber foam (10). ) to maintain the shape of the sheet.

In addition, since polypropylene fibers have a significantly lower specific gravity than polyester fibers and have excellent floating properties, the polypropylene fiber sheet 20 floats the polyester fiber foam 10 on water so that the polyester fiber foam 10 becomes oily. Allows for adsorption.

Such polypropylene fiber sheet 20 may be a spunbond polypropylene nonwoven fabric manufactured by a spunbond method that continuously combines spun polypropylene fibers.

The polyester fiber foam (10) is supported by the polypropylene fiber sheet (20), maintains the shape of the foam, and absorbs and removes oil. This polyester fiber foam 10 is preferably made by mixing 10 to 30% by weight of 6-denier polyester fibers of different thicknesses and 70 to 90% by weight of 20-denier polyester fibers.

When the polyester fiber foam (10) is manufactured through the process as described above with only 20 denier polyester fibers, the bulkiness is excellent and large voids are formed between the fibers, but the polyester fiber foam (10) has low density. There is a problem that it cannot maintain this shape and collapses without strength, collapsing the pores.

When the polyester fiber foam 10 is manufactured through the process as described above with only 6-denier polyester fibers, the density is high and it is advantageous for the polyester fiber foam 10 to maintain its shape, but the spacing between fibers is narrow and micropores form. There is a problem that oil adsorption capacity decreases.

Therefore, the 6-denier polyester fiber adjusts the density of the polyester fiber foam 10, allowing the 20-denier polyester fiber to maintain its shape and pores and effectively adsorb oil.

Compared to the total weight of the polyester fiber foam (10), if the 6-denier polyester fiber is less than 10% by weight, it is difficult to maintain the shape of the polyester fiber foam (10), and if it exceeds 30% by weight, the polyester fiber foam (10) There is a problem that the oil adsorption capacity of the product is reduced.

In addition, compared to the total weight of the polyester fiber foam (10), if the 20 denier polyester fiber is less than 70% by weight, there is a problem that the oil adsorption capacity of the polyester fiber foam (10) is reduced, and if it exceeds 90% by weight, the polyester fiber It is difficult to maintain the shape of the fiber foam (10).

The polyester fiber constituting the polyester fiber foam 10 may be 100% recycled polyester fiber using PET flakes (flaky solids) made by crushing PET bottles, and may be polyester fiber. It may be polypropylene fiber or recycled polypropylene fiber constituting the propylene fiber sheet 20.

In this way, the polyester fiber foam (10), which is made by mixing 10 to 30% by weight of 6-denier polyester fiber and 70 to 90% by weight of 20-denier polyester fiber, and the polypropylene fiber sheet (20) are bound and laminated to form an absorbent fabric. It is best to perform the needle punching process by changing the needle punching process conditions for general non-woven fabrics.

At this time, it is preferable to laminate 15 to 20% by weight of the polypropylene fiber sheet (20) on 80 to 85% by weight of the polyester fiber foam (10) relative to the total weight of the adsorbent cloth and then needle punch to make the adsorbent cloth. The polypropylene fiber sheet 20 preferably has a weight of 40 to 80 g/sqm.

Compared to the total weight of the absorbent cloth, if the polyester fiber foam (10) is less than 80% by weight or exceeds 85% by weight, the oil adsorption power or shape retention is lowered, and the polypropylene fiber sheet (20) is less than 15% by weight or If it exceeds 20% by weight, shape retention and oil adsorption capacity decrease. Preferably, based on the total weight of the adsorbent cloth, it is good to make the adsorbent cloth by laminating 80% by weight of polyester fiber foam (10) with 20% by weight of polypropylene fiber sheet (20).

When the polyester fiber foam (10) and the polypropylene fiber sheet (20) are bound through a general non-woven needle punching process (15,000 needles on the needle plate, needle depth of 10 to 12 mm, needle punching speed of 500 to 800 rpm), the polyester fiber foam (10) and the polypropylene fiber sheet (20) are bound. The mechanical interweaving of the fibers constituting the fiber foam (10) and the polypropylene fiber sheet (20) is manufactured densely, and as the density increases, the thickness decreases and durability decreases, thereby reducing the oil absorption ability of the polyester fiber foam (10) and the polypropylene fiber. There is a problem that the floatability of the sheet 20 is reduced.

For this reason, the number of needles (density) of the needle plate used in the general non-woven needle punching process is 50% smaller and arranged diagonally, the depth of needle is punched deeper than the existing needle depth, and the needle punching speed is also It is desirable to punch slower than the existing needle punching speed.

For example, the number of needles in the needle plate is 7,500, which is 50% less than before, the needle depth is 17 to 18.5 mm, which is deeper than before, and the needle punching speed is 300 to 400 rpm, which is slower than before, making polyester fiber foam (10). By binding the polypropylene fiber sheet 20, the porosity between the fibers of the polyester fiber foam 10 is greatly improved, and the oil adsorption capacity can be further improved.

In addition, two needle punching machines can be placed, and in order to minimize physical damage to the polyester fiber foam (10) and the polypropylene fiber sheet (20) and bind them together, the needle punching speed of the first process is set to that of the needle of the second process. It is best to proceed 10-30% slower than the punching speed. For example, in the first process, the needle punching speed may be performed at 30 to 120 rpm, and in the second process, the needle punching speed may be performed at 300 to 400 rpm.

The adsorbent fabric produced by this needle punching process has greatly improved porosity and bulkiness, and has a maximum air permeability of 300 to 600 cm3/cm2/sec.

Meanwhile, the water repellent coated on the absorbent fabric lowers the moisture absorption rate and increases the floatability of the absorbent fabric. The water repellent is coated not only on the polyester fiber foam (10) but also on the polypropylene fiber sheet (20), thereby lowering the moisture absorption rate and increasing floatability of the polyester fiber foam (10) and polypropylene fiber sheet (20).

When the water repellent is coated only on either the polyester fiber foam (10) or the polypropylene fiber sheet (20), either the uncoated polyester fiber foam (10) or the polypropylene fiber sheet (20) absorbs moisture. As the weight increases, the polyester fiber foam 10 can be located under the oil layer (oil layer) or submerged in water.

The water repellent is preferably a non-fluorine water repellent, and is preferably a wax, such as paraffin wax, microcrystalline wax, polyethylene wax, or polypropylene wax. It can be a single wax, and it is recommended to use a wax with a solid content of 30 to 40% or more.

It is desirable to dilute such wax to form a water repellent. For example, the water repellent is preferably formulated to contain 10 to 15% by weight of wax relative to the total weight of the water repellent. If the amount of wax compared to the total weight of the water repellent is less than 10% by weight, the water repellent effect is reduced, and if it exceeds 15% by weight, the relative oil absorption rate (adsorption rate) is reduced due to the strong water repellent effect, making it impossible to meet the performance and quality standards of the absorbent cloth.

It is preferable that the wax is diluted in water to form a water repellent, and the water repellent can be formed by mixing 10 to 15% by weight of wax and 85 to 90% by weight of water. Such water repellent is coated on the polypropylene fiber sheet (20) and polyester fiber foam (10) that make up the absorbent fabric by either spraying (spraying) or dipping (impregnating), thereby lowering the moisture absorption rate of the absorbent fabric and reducing the moisture absorption rate of the absorbent fabric. You can increase your meteorism.

The immersion process can be accomplished by immersing the absorbent cloth in a immersion bucket to absorb the water repellent into the polypropylene fiber sheet 20 and the polyester fiber foam 10, and then squeezing it with a roller at a certain pressure, thereby forming polypropylene. The water repellent is densely deposited and applied between the gaps between the fibers of the fiber sheet 20 and the polyester fiber foam 10, resulting in an excellent water repellent effect.

The spray process can be performed by spraying a water repellent agent on the polypropylene fiber sheet 20 and the polyester fiber foam 10 through a nozzle, respectively. When spraying the water repellent, the water repellent is sprayed in a fan-shaped spray pattern through a fine nozzle, and compressed air is simultaneously sprayed with an air gun so that the water repellent can be uniformly applied and penetrated into the polypropylene fiber sheet 20 and the polyester fiber foam 10. Let it happen. As a result, the water repellent is densely deposited and applied between the voids between the fibers of the polypropylene fiber sheet 20 and the polyester fiber foam 10, resulting in an excellent water repellent effect.

<Example 1>

Add 20% by weight of 6-denier polyester fiber and 80% by weight of 20-denier polyester fiber into the hopper and mix to make polyester fiber foam. After laminating polypropylene fiber sheet on polyester fiber foam, needle punching is performed to create absorbent fabric. Manufactured.

The number of needles on the needle plate was 7,500, arranged diagonally, and needle punching was performed at a needle depth of 18.5 mm and a punching speed of 400 rpm to produce absorbent fabric dough.

Afterwards, the absorbent fabric was coated by immersing it in a water repellent prepared by mixing 15% by weight of wax and 85% by weight of water and dried to prepare an oil absorbent fabric.

<Comparative Example 1>

Add 20% by weight of 6-denier polyester fiber and 80% by weight of 20-denier polyester fiber into the hopper and mix to make polyester fiber foam. After laminating polypropylene fiber sheet on polyester fiber foam, needle punching is performed to create absorbent fabric. Manufactured. Absorbent fabric was manufactured by needle punching in the same manner as the general non-woven needle punching process.

Afterwards, the absorbent fabric was coated by immersing it in a water repellent prepared by mixing 15% by weight of wax and 85% by weight of water and dried to prepare an oil absorbent fabric.

<Comparative Example 2>

A commercially available oil absorbent cloth made of polypropylene fiber was purchased.

<Experimental Example 1>

The specimens of Example 1 and Comparative Examples 1 to 2 measuring 10 cm wide × 10 cm tall were prepared. The oil absorption rate and water absorption rate were measured by placing each specimen in a water tank with an oil surface formed on it for 5 minutes, and the results are shown in Table 1.

division Absorption rate absorption rate g/g g/㎤ g/g g/㎤ Example 1 15 1.2 0.90 0.08 Comparative Example 1 9 0.8 0.95 0.10 Comparative Example 2 10.9 1.1 0.40 0.05

As a result of the test, it was proven that Example 1 had superior oil absorption rate than Comparative Examples 1 and 2.

The above-described present invention has been examined with a focus on preferred embodiments, and those skilled in the art will be able to implement embodiments other than the detailed description of the present invention within the essential technical scope of the present invention. You will be able to. Here, the essential technical scope of the present invention is indicated in the claims, and all differences within the equivalent scope should be construed as being included in the present invention.

10: Polyester fiber foam
20: Polypropylene fiber sheet

Claims (5)

polyester fiber foam;
Polypropylene fiber sheets laminated and bonded to the polyester fiber foam; and
It includes a water repellent coated on the polyester fiber foam and polypropylene fiber sheet,
The polyester fiber foam is an oil absorption cloth, characterized in that it is composed of 10 to 30% by weight of 6 denier polyester fiber and 70 to 90% by weight of 20 denier polyester fiber.
delete A first step of mixing polyester fibers of different thicknesses;
A second step of making polyester fiber foam from the mixed fibers and laminating polypropylene fiber sheets on the polyester fiber foam;
A third step of making an absorbent fabric by combining the polyester fiber foam and the polypropylene fiber sheet; and
A fourth step of coating the absorbent fabric with a water repellent containing wax,
A method of manufacturing an oil absorbent cloth, characterized in that 10 to 30% by weight of 6-denier polyester fiber and 70 to 90% by weight of 20-denier polyester fiber are mixed in the first step.
delete According to clause 3,
A method of manufacturing an oil absorbent cloth, wherein the water repellent is composed of 10 to 15% by weight of the wax based on the total weight.