KR102361295B1 - Biodegradable absorbent and manufacturing method thereof - Google Patents

Abstract

The present invention relates to a biodegradable absorbent and a manufacturing method therefor and, more specifically, to a biodegradable absorbent having excellent hygroscopicity as well as being environmentally friendly, and a manufacturing method therefor. Accordingly, the present invention comprises a non-woven fabric including 100 parts by weight of cotton, 250-350 parts by weight of polylactic acid (PLA), and 500-700 parts by weight of rayon.

Description

Biodegradable absorbent and manufacturing method thereof

The present invention relates to a biodegradable absorbent and a method for manufacturing the same, and more particularly, to an environmentally friendly biodegradable absorbent having excellent hygroscopicity and a method for manufacturing the same.

An absorbent pad for absorbing moisture is used for a pet's stool plate, a sanitary napkin, or a baby's diaper.

The prior art, Registered Utility Model No. 20-0492146 (hereinafter referred to as the prior art) relates to a toilet plate washing device for companion animals, and more specifically, it is to wash a toilet plate that is difficult to reuse, and to enable reuse, defecation. The body part 110 into which the plate 100 can be inserted, the nozzle part 120 provided on the inner rear surface of the body part 110 for high-pressure washing or drying of the inserted bowel movement plate 100, the nozzle part ( 120) includes a supply unit 130 for supplying washing water or air at high pressure, and includes a UV lamp for sterilization by irradiating ultraviolet rays to the inserted bowel movement plate 100 .

However, as in the prior art, no matter how sterilized the absorbent pad is, it is discarded because it comes in contact with urine and feces, etc., and there is a limit to repeated use. There were problems such as excessively polluting the environment because it did not decompose even after passing.

The present invention has been devised to solve the above problems, and uses natural raw materials, minimizes the generation of harmful substances to the human body, has excellent thermal insulation and restoring power, does not generate static electricity, and in particular an environment decomposed by microorganisms during disposal An object of the present invention is to provide a friendly biodegradable absorbent and a method for manufacturing the same.

Another object of the present invention is to provide a biodegradable absorbent with improved durability and a method for manufacturing the same.

The present invention for the purpose of solving the above problems has the following configuration and features.

100 parts by weight of cotton, 250 to 350 parts by weight of poly lactic acid (PLA), and 500 to 700 parts by weight of rayon.

In addition, it may include a film including polylactic acid and provided on one surface of the nonwoven fabric.

100 parts by weight of cotton, 250 to 350 parts by weight of poly lactic acid (PLA), and 500 to 700 parts by weight of rayon to prepare a compounding agent (S10); preparing the compounding agent as a web (S20); Laminating a plurality of webs and needle punching to manufacture a nonwoven fabric (S30); Engraving a pattern or character on one side or the other side of the nonwoven fabric (S40); preparing a biodegradable absorbent by attaching a film to one surface of the nonwoven fabric (S50); and a step (S60) including at least one of cutting the biodegradable absorbent and packaging the biodegradable absorbent.

The present invention having the above configuration and characteristics has an effect of being excellent in hygroscopicity, heat retention, restoring force, etc. by including a nonwoven fabric containing cotton.

In addition, the present invention has the effect of being soft to the touch, excellent in hygroscopicity, suppressing the generation of static electricity, and being easily decomposed upon absorption by including the nonwoven fabric including rayon.

In addition, the present invention includes the nonwoven fabric containing polylactic acid, so that it has plastic-like properties, so that the durability is improved, the generation of harmful substances is suppressed, and it is a natural material and is naturally decomposed by microorganisms to have the effect of being environmentally friendly.

In addition, the present invention has the effect of maintaining the shape of the nonwoven fabric and suppressing water absorption on the floor by including the film.

1 is a view for explaining a biodegradable absorbent according to an embodiment of the present invention.
2 is a view for explaining a nonwoven fabric.
3 is a schematic block diagram for explaining a method for manufacturing a biodegradable absorbent according to an embodiment of the present invention.
4 is a view for explaining a further embodiment of the present invention.

Since the present invention can have various changes and can have various forms, implementation examples (態樣, aspects) (or embodiments) will be described in detail in the text. However, this is not intended to limit the present invention to the specific disclosed form, it should be understood to include all modifications, equivalents and substitutes included in the spirit and scope of the present invention.

The terminology used herein is only used to describe a specific embodiment (aspect, aspect, aspect) (or embodiment), and is not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly dictates otherwise. In the present application, terms such as comprises or consists of are intended to designate that the features, numbers, steps, operations, components, parts, or combinations thereof described in the specification exist, but one or more other features It is to be understood that it does not preclude the possibility of the presence or addition of numbers, steps, operations, components, parts, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical and scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related art, and should not be interpreted in an ideal or excessively formal meaning unless explicitly defined in the present application. does not

~1~, ~2~, etc. described in the present specification are only to be referred to to distinguish that they are different components, and are not limited to the order of manufacture, and their names in the detailed description and claims of the invention are may not match.

Throughout this specification, when a part is "connected" to another part, it includes not only the case of being "directly connected", but also the case of being "indirectly connected" with another element interposed therebetween. do.

1 is a view for explaining a biodegradable absorbent according to an embodiment of the present invention, Figure 2 is a view for explaining a nonwoven fabric.

Unlike the prior art, the biodegradable absorbent 1 according to an embodiment of the present invention is environmentally friendly because it is easy to decompose upon disposal.

1 and 2 , the present absorbent (biodegradable absorbent 1 according to an embodiment of the present invention) includes a nonwoven fabric 11 .

The nonwoven fabric 11 includes cotton, poly lactic acid (PLA) and rayon (Rayon). Each component of the nonwoven fabric 11 will be described based on 100 parts by weight of cotton.

Cotton (Gossypium hirsutum) is also called cotton (綿花) and chomyeon (草綿). Although it is native to tropical regions, it is widely cultivated in temperate regions as a textile crop. It is usually an annual plant, but there are also small shrubs. It grows to around 90 cm in temperate zones and up to 2 m in tropical regions. The roots are straight, and the branches are branched as the stem grows straight.

The leaves are alternate phyllotaxis, and 3 to 5 leaves are split in the shape of a palm, and the stipule is a triangular lanceolate. Flowers are white or yellow, and gradually turn pink after flowering. The diameter is about 4 cm. 5 petals curl in a spiral. There are 3 bracts with saw teeth under the calyx, and there is a small calyx inside. There are 1 pistil and about 130 stamens. The fruits are capsules (??果), egg-shaped and pointed at the tip. When the capsules mature, seeds with long downy hairs appear. The hairs are collected to make cotton, and the seeds are used to squeeze oil.

As described above, it was said that downy hair grows on the cotton seed and the above-mentioned down hair is collected and made into cotton. , 100 parts by weight of the nonwoven fabric 11 was used.

In the above-mentioned cotton, the cotton is known to have excellent heat retention and restoring power, and was adopted because of its excellent hygroscopicity. As a natural material, it is environmentally friendly and does not emit harmful substances to the environment when disposed of.

Rayon is made from refined cellulose, primarily from dissolved pulp, which is a chemically transformed soluble compound. In general, rayon is made by treating wood or cotton shavings with a suitable chemical method to make pulp made of pure fibers, then chemically dissolving them and then coagulating them into fibers again.

Rayon manufactured by the process as described above has good hygroscopicity, is soft to the touch, but becomes weak when wet with water, and may easily wrinkle and shrink. In addition, the appearance is similar to silk fiber, and it is smooth and does not easily generate static electricity.

Rayon is considered a semi-polymer fiber because it originates from cellulose, a naturally occurring polymer.

As described above, the nonwoven fabric 11 of the present absorbent material contains the above-described rayon, and thus provides an appearance like silk fiber, and is particularly soft to the touch, so it is preferable to use it for contact with the skin.

As described above, rayon having excellent hygroscopicity is an essential component in that the nonwoven fabric 11 is a material that absorbs moisture.

In addition, since rayon is manufactured by wood or cotton shavings, it is environmentally friendly even when discarded, and as described above, since rayon becomes weak when wet with water, it has the advantage of easy disposal after absorbing moisture.

The rayon is included in an amount of 500 to 700 parts by weight based on 100 parts by weight of cotton.

When less than 500 parts by weight of rayon is used relative to 100 parts by weight of cotton, the above-described rayon has a problem in that hygroscopicity is lowered and, in particular, the feel is not good. When the amount of rayon exceeds 700 parts by weight, when the nonwoven fabric 11 of the present absorbent absorbs moisture, it becomes too weak and it is difficult to maintain the shape.

The rayon is more preferably contained in an amount of 550 to 650 parts by weight based on 100 parts by weight of cotton.

Poly lactic acid (Poly Lettic Acid (PLA)) is a biopolymer obtained from the fermentation process of lactic acid contained in natural products such as corn or sugar cane.

Since it is a material produced from natural materials, it is eco-friendly and harmless to the human body. In particular, it is safe because harmful substances such as environmental hormones and heavy metals are not detected even when animals and babies bite or suck.

As such, the nonwoven fabric 11 of the present absorbent contains polylactic acid, which suppresses the generation of substances harmful to the human body, and maintains the shape of the nonwoven fabric 11 and improves durability by exhibiting the same characteristics as general plastics during use. .

In addition, polylactic acid has the advantage of being able to print more precisely than ABS because it has less shrinkage due to thermal deformation.

Polylactic acid exhibits plastic-like properties during use, but is 100% biodegradable by microorganisms when discarded, thereby improving the biodegradability of the nonwoven fabric 11 .

Whereas general plastics take hundreds of years to decompose, polylactic acid is decomposed naturally in about 6 months to 1 year by microorganisms.

As such, the nonwoven fabric 11 of the present absorbent material contains polylactic acid to improve durability when used, and at the same time, it is manufactured from natural raw materials, the generation of harmful substances is suppressed, and is environmentally friendly because it is naturally decomposed by microorganisms during disposal.

The polylactic acid includes 250 to 350 parts by weight relative to 100 parts by weight of cotton, but when the polylactic acid is less than 250 parts by weight, durability is deteriorated, and in particular, there is a problem in that biodegradability is lowered upon disposal. When the polylactic acid exceeds 350 parts by weight, the absorbency of the absorbent nonwoven fabric 11 is lowered, and in particular, the price is high, and there is a problem in that the price competitiveness of the absorbent is lowered.

The polylactic acid may more preferably contain 270 to 330 parts by weight based on 100 parts by weight of cotton.

The above-mentioned cotton, polylactic acid, and rayon are manufactured into the nonwoven fabric 11 through the compounding agent manufacturing step (S10), the web manufacturing step (S20), and the nonwoven fabric manufacturing step (S30) in the manufacturing method of the biodegradable absorbent to be described later.

Referring to FIG. 1 , the absorbent may include polylactic acid and a film 12 provided on one surface of the nonwoven fabric 11 . The polylactic acid contained in the film 12 corresponds to the polylactic acid contained in the nonwoven fabric 11 described above.

The above-described film 12 may be attached to one surface of the nonwoven fabric 11 by a film attaching step (S5) to be described later in a method for producing a biodegradable absorbent to be described later.

The above-described film 12 is provided on one surface of the nonwoven fabric 11 to maintain the shape of the nonwoven fabric 11 and improve durability.

At the same time, it was said that the film 12 is provided on one side of the nonwoven fabric 11. When this absorbent is disposed on the floor and used, the film 12 is placed below the nonwoven fabric 11 so that the moisture on the floor is transferred to the nonwoven fabric 11. It is possible to improve the service life of the nonwoven fabric 11 by suppressing the absorption.

As described above, since polylactic acid is naturally decomposed by microorganisms, the above-described film 12 is also naturally decomposed by microorganisms, and thus has environmentally friendly properties.

3 is a schematic block diagram for explaining a method for manufacturing a biodegradable absorbent according to an embodiment of the present invention.

On the other hand, hereinafter, a method for manufacturing a biodegradable absorbent according to an embodiment of the present invention (hereinafter referred to as 'the present method') will be described. However, since this method relates to the method for manufacturing the present absorbent described above, and includes the same or corresponding technical features as the present absorbent, the same reference numerals are used for the same or similar configuration as the above salpin configuration, and the overlapping description is to be abbreviated or omitted.

1 to 3, the method (a method for manufacturing a biodegradable absorbent according to an embodiment of the present invention) includes a compounding agent manufacturing step (S10), a web manufacturing step (S20), a nonwoven fabric manufacturing step (S30), It includes a printing step (S40), a film attaching step (S50) and a post-processing step (S60).

The compounding agent preparation step (S10) is a step of preparing a compounding agent by blending (mixing) 100 parts by weight of cotton, 250 to 350 parts by weight of poly lactic acid (PLA), and 500 to 700 parts by weight of rayon.

The above-described exemplary compounding agent preparation step (S10) may be performed by a combiner (blender), and the above-described combiner may be one commonly used in the relevant field, and in general, including a stirring blade, etc., the above-mentioned cotton , polylactic acid, rayon, etc. can be opened.

In the combiner, cotton, polylactic acid, and rayon are opened and manufactured into fibers.

The web manufacturing step (S20) is a step of manufacturing the compounding agent (fiber) into a web using a card machine. As the card machine is commonly used in the relevant field, a more detailed description will be omitted.

The compounding agent (fiber) is supplied to a card machine, uniformly dispersed and laminated, entangled with each other, and manufactured into a web.

The nonwoven fabric manufacturing step (S30) is a step of manufacturing a nonwoven fabric 11 by laminating a plurality of webs and needle punching.

In the nonwoven fabric manufacturing step (S30), a plurality of webs may be stacked in the vertical direction, and the stacked webs are pressed with a needle (needle) that is connected to a press and moves up and down to form a plurality of webs arranged and stacked in two dimensions, respectively. It is made of a nonwoven fabric 11 bonded to each other in a three-dimensional structure.

Of course, the nonwoven fabric manufacturing step (S30) may include a forming process of preheating and fusing the nonwoven fabric 11 as described above.

The printing step (S40) is a step of engraving a pattern or character on one side or the other side of the nonwoven fabric 11, and may be exemplarily performed by a printing machine, and the printing machine of the nonwoven fabric 11 is commonly used in the field. Therefore, a more detailed description will be omitted.

The film attaching step (S50) is a step of preparing the biodegradable absorbent 1 by attaching the film 12 to one surface of the nonwoven fabric 11 .

Illustratively, an eco-friendly adhesive such as a natural adhesive containing starch made from corn or the like is applied to one surface of the nonwoven fabric 11 , and the film 12 may be attached to one surface of the nonwoven fabric 11 .

The film attaching step (S50) is a laminating machine for pressing the nonwoven fabric 11 and the film 12 by providing a spraying device, a pressure roller, etc. for spraying the eco-friendly adhesive on one surface of the nonwoven fabric 11 by way of example and the like.

The post-treatment step (S60) may include at least one of a step of cutting the biodegradable absorbent 1 (hereinafter, a cutting step) and a step of packaging the biodegradable absorbent 1 (hereinafter, a packaging step).

The cutting step may be a step of cutting the biodegradable absorbent 1 to a predetermined size by being performed by a cutter or the like, and the packaging step may be exemplarily performed by a packaging machine. As a packaging machine is commonly used in the relevant field, a more detailed description will be omitted.

On the other hand, the film 12 may include 1.5 parts by weight of the anti-condensation agent (G) based on 100 parts by weight of polylactic acid. The anti-condensation agent (G) suppresses the film 12 from falling below a predetermined temperature to suppress the formation of dew on the film 12 and the non-woven fabric 11, so that the non-woven fabric 11 absorbs dew at a low temperature. It is a structure for suppressing that a service life falls by absorbing moisture unnecessarily.

Referring to FIG. 4, when the condensation inhibitor (G) is described in more detail, the condensation inhibitor (G) is an impact exothermic agent (G1) containing 0.2 parts by weight of sodium acetate, tolylene diisocyanate, and ethylenediamine An endothelial agent (G2) containing 0.1 parts by weight of polyurea formed through interfacial polycondensation of (ethylenediamine), a shelling agent (G3) containing 0.3 parts by weight of sulfur-cured ethylene-propylene diene monomer (Ethylene Propylene Diene Rubber), A cationic agent (G4) containing 0.2 parts by weight of a mixture of magnetite, polyacrylic acid and polyoxyethylene, an aspect ratio of 20 or more and a thermal conductive spacer containing 0.4 parts by weight of carbon fiber (G5) ) and iron (fe) may include a pressurizing agent (G6) containing 0.3 parts by weight.

4, the impact pyrogen (G1) of the condensation inhibitor (G) is an aqueous solution containing sodium acetate, and the solvent may be, for example, water, and the sodium acetate may be dissolved in the solvent in a supersaturated state. .

Sodium acetate of the impact exothermic agent (G1) is supersaturated in a solvent and is in a very unstable state, so it hardens easily even with a slight impact, and can release heat contained in a liquid state. The impact heat generating agent (G1) may generate heat by being impacted by a pressurizing agent (G6), which will be described later.

It is preferable that 0.2 parts by weight of sodium acetate is included. When sodium acetate is less than 0.2 parts by weight in the impact heat generating agent (G1), the exothermic effect is not large, and when it exceeds 0.2 parts by weight, the weight of the condensation inhibitor (G) increases and the film ( 12) (PLA) sinks down, there is a problem that the effect of suppressing condensation is reduced.

The endothelial agent G2 surrounds the impact heating agent G1, and as described above, may include polyurea formed through interfacial polycondensation of tolylene diisocyanate and ethylenediamine.

Tolylene diisocyanay and ethylenediamine are interfacially polycondensed when stirred to form a shell (endothelium), but the presence of unreacted amine and the process of mixing oxygen and nitrogen atoms or present in other molecules in the film 12 A positive charge can be formed by attracting positively charged hydrogen or the like through dipole interactions.

Illustratively, the impact heating agent (G1) may be accommodated in the endothelial agent (G2) in a liquid state by being heated after being stirred with tolylene diisocyanay and ethylenediamine in a solid state, and the impact heating agent (G1) is the endothelium The process existing inside the second (G2) is not limited to the above method and may vary.

The endothelial agent (G2) preferably contains 0.1 parts by weight of polyurea, but when the amount of polyurea is less than 0.1 parts by weight, the impact heating agent (G1) containing 0.2 parts by weight cannot be sufficiently wrapped with a sufficient thickness. There is a risk that the impact heating agent (G1) in a liquid state may be lost, and when it exceeds 0.1 parts by weight, there is a problem in that the heat generated by the impact heating agent (G1) is not easily transferred to the outside of the condensation inhibitor (G).

The envelope (G3) surrounds the endothelium (G2) as shown in FIG. 4 and is disposed outside the endothelium (G2), and as described above, sulfur-cured ethylene-propylene diene monomer (Ethylene Propylene Diene Rubber) 0.3 It may contain parts by weight.

Ethylene-propylene diene monomer (EPDM) is obtained by adding a non-conjugated diene during the hybrid polymerization of ethylene and propylene, and has excellent water resistance and ozone resistance.

Illustratively, the EPDM may include an ethylene-propylene copolymer, treated calcined kaolin vinyl silane, stearic acid, zinc oxide, trimethylquinoline, a paraffinic plasticizer, a processing aid, and a conductive carbon black.

EPDM is a hybrid polymer capable of peroxide or sulfur vulcanization, and EPDM with added sulfur has a faster shrinkage rate at a low temperature of 5° C. or less than EPDM with added peroxide.

That is, the sulfur-cured ethylene-propylene diene monomer is sulfur-added to the EPDM, and may further include dithiomorpholine, tetramethylthiuram disulfide, dibutyldithiocarbonate zinc, and ethylene thiourea in addition to sulfur.

It is preferable that 0.3 parts by weight of the sulfur-cured ethylene-propylene diene monomer in the shelling agent (G3) is included, but when less than 0.3 parts by weight is used, the coating agent (G2) to be described later and the heat conduction spacer to be described later are not sufficiently wrapped with a sufficient thickness. If it exceeds 0.3 parts by weight, the weight of the anti-condensation agent (G) increases and sinks in the film (12) (PLA), so a problem may occur in the function of the anti-condensation agent (G).

The cationic agent (G4) is provided on the outer and inner surfaces of the shelling agent (G3), respectively, and as described above, magnetite, polyacrylic acid and polyoxyethylene are included. Thus, it was used to add the polarity of the envelope (G3).

Magnetite is magnetic when it receives an external magnetic field, but when the external magnetic field is removed, the residual magnetism disappears and there is no side effect due to residual magnetism. The magnetite may be embedded in the outer and inner surfaces of the envelope G3, respectively.

Polymethacrylic acid is coated on the surface of the magnetite, and contains a plurality of carboxyl groups to form a coordination bond with the magnetite at multiple bonding points, so that it is possible to increase the coating stability.

Polyoxyethylene may react with a carboxyl group that does not form a coordination bond with magnetite on the surface of polymethacrylic acid to form a stable bond through an amide bond to impart positive charge properties to the magnetite. The positive surface charge of the cationic agent (G4) may have a surface zeta potential of +30 mV or more.

In the cationic agent (G4), 0.2 parts by weight of a mixture of magnetite, polyacrylic acid, and polyoxyethylene is preferably used. If less than 0.2 parts by weight, the positive charge is not sufficient, and 0.2 When the weight part is exceeded, there is a problem in that the weight of the anti-condensation agent (G) is excessively increased, and the condensation inhibitor (G) sinks in the PLA.

The heat conduction spacer (G5) is provided between the endothelial material (G2) and the sheathing material (G3) to separate the endothelial material (G2) and the sheathing material (G3). Carbon fiber was used. The carbon fiber may have a thermal conductivity of about 200 W/mK, and may serve to transfer the heat generated by the impact heat generating agent (G1) to the shell material (G3) side.

The heat conduction spacer (G5) preferably contains 0.4 parts by weight of the carbon fiber. If it is less than 0.4 parts by weight, heat conduction is not sufficient. There is a problem in increasing the weight of G).

The pressurizing agent (G6) includes iron, is provided on the inner surface of the envelope (G3) to protrude inward, and may be provided in plurality at intervals from the inner surface of the envelope (G3).

The pressurizing agent (G6) applies an impact to the impact heat agent (G1) by pressurizing the impact heat agent (G1) as the shell material (G3) contracts, and the iron preferably contains 0.3 parts by weight, 0.3 parts by weight. When less than part is included, a sufficient impact cannot be applied to the impact heat generating agent (G1), and when it exceeds 0.3 parts by weight, there is a problem in that the weight of the dew condensation inhibitor (G) is excessively increased.

[A] of FIG. 4 shows a state in which the envelope (G3) is not contracted at a temperature exceeding 5°C. The sheathing agent (G3) and the endothelial material (G2) are spaced apart by a heat conductive spacer (G5), and their length in a state in which the sheathing material (G3) is not contracted, such as at a temperature exceeding 5°C of the above-described pressurizing agent Since the distance between the tentative sheathing agent G3 and the endothelial material G2 is shorter, the pressurizing agent G6 cannot pressurize the impact heating agent G1 in a state in which the sheathing agent G3 is not contracted.

As described above, since the envelope (G3) and the endothelial material (G2) have a positive charge, the endothelium (G2) and the envelope material (G3) generate a repulsive force, so that the envelope (G3) is not contracted. The pressurizing agent provided on the inner surface of the agent (G3) suppresses the pressure of the endothelial agent (G2).

In addition, when there are multiple units (GU) of the condensation inhibitor (G), it causes the neighboring units (GU) to be separated from each other by the repulsive force between the positively charged envelopes (G3). Acidity can be improved.

[B] of FIG. 4 is a view showing a state in which the envelope (G3) is contracted at a temperature of 5°C or less. If the temperature of the film 12 drops to 5° C. or less in the state in which the film 12 including the dew condensation inhibitor (G) is applied, as described above, the envelope (G3) is contracted, and the envelope (G3) is The separation distance between (G3) and the endothelial material (G2) is reduced, and the pressurizing agent (G6) provided on the inner surface of the outer covering material (G3) penetrates the distance between the carbon fibers or between the pores of the carbon fibers to penetrate the endothelial material ( By pressing G2), it is possible to apply an impact to the impact heating agent (G1) provided inside the endothelial agent (G2).

The impact heating agent (G1) generates heat as an impact is applied, and the above-described heat is transferred to the shell material (G3) through the heat conduction spacer (G5), and the film (12) through the shell material (G3) It is possible to effectively suppress the formation of dew on the surface of the film 12 by increasing the temperature.

Through this, there is an advantage that it is possible to suppress the freezing of dew formed on the surface of the film 12 in cold weather such as winter (condensation suppression).

It goes without saying that the envelope (G3) may be liquefied again later by the impact heating agent (G1) or heat applied from the outside to be restored to a reusable state. Various known techniques may be used for externally applying heat to the envelope (G3).

The present invention described above with reference to the accompanying drawings is capable of various modifications and changes by those skilled in the art, and such modifications and changes should be construed as being included in the scope of the present invention.

Biodegradable Absorbent: 1 Nonwoven: 11
Film: 12

Claims (4)

Nonwoven fabric comprising 100 parts by weight of cotton, 250 to 350 parts by weight of poly lactic acid (PLA), and 500 to 700 parts by weight of rayon;
including,
Containing polylactic acid, further comprising a film provided on one surface of the nonwoven fabric,
The film includes 1.5 parts by weight of a dew condensation inhibitor (G),
The anti-condensation agent (G),
an impact exothermic agent (G1) comprising 0.2 parts by weight of sodium acetate;
an endothelial agent (G2) containing 0.1 parts by weight of polyurea formed through interfacial polycondensation of tolylene diisocyanate and ethylenediamine, and enclosing the impact heat generating agent;
a sulfur-cured ethylene-propylene diene monomer (Ethylene Propylene Diene Rubber) containing 0.3 parts by weight, enclosing the endothelial material (G2), and shrinking at a temperature of 5° C. or less (G3);
a cationic agent (G4) comprising 0.2 parts by weight of a mixture of magnetite, polyacrylic acid, and polyoxyethylene, and provided on each of the outer and inner surfaces of the envelope (G3);
A thermal conductive spacer (G5) comprising 0.4 parts by weight of carbon fibers having an aspect ratio of 20 or more, and provided between the endothelial material (G2) and the outer covering material (G3);
A pressing agent (G6) containing 0.3 parts by weight of iron (fe), provided in a plurality at intervals on the inner surface of the sheathing agent (G3), and having a length shorter than the separation distance between the sheathing agent (G2) and the sheathing agent (G3) );
A biodegradable absorbent comprising a. delete delete 100 parts by weight of cotton, 250 to 350 parts by weight of poly lactic acid (PLA), and 500 to 700 parts by weight of rayon to prepare a compounding agent (S10);
Preparing the compounding agent as a web (S20);
Laminating a plurality of webs and needle punching to manufacture a nonwoven fabric (S30);
Engraving a pattern or character on one side or the other side of the nonwoven fabric (S40);
preparing a biodegradable absorbent by attaching a film to one surface of the nonwoven fabric (S50);
A step (S60) comprising at least one of cutting the biodegradable absorbent and packaging the biodegradable absorbent;
including,
The film contains polylactic acid and is provided on one surface of the nonwoven fabric,
The film includes 1.5 parts by weight of the anti-condensation agent (G),
The anti-condensation agent (G),
an impact exothermic agent (G1) comprising 0.2 parts by weight of sodium acetate;
an endothelial agent (G2) containing 0.1 parts by weight of polyurea formed through interfacial polycondensation of tolylene diisocyanate and ethylenediamine, and enclosing the impact heat generating agent;
a sulfur-cured ethylene-propylene diene monomer (Ethylene Propylene Diene Rubber) containing 0.3 parts by weight, enclosing the endothelial material (G2), and shrinking at a temperature of 5° C. or less (G3);
a cationic agent (G4) comprising 0.2 parts by weight of a mixture of magnetite, polyacrylic acid, and polyoxyethylene, and provided on each of the outer and inner surfaces of the envelope (G3);
A thermal conductive spacer (G5) comprising 0.4 parts by weight of carbon fibers having an aspect ratio of 20 or more, and provided between the endothelial material (G2) and the outer covering material (G3);
A pressing agent (G6) containing 0.3 parts by weight of iron (fe), provided in a plurality at intervals on the inner surface of the sheathing agent (G3), and having a length shorter than the separation distance between the sheathing agent (G2) and the sheathing agent (G3) );
A method for producing a biodegradable absorbent comprising a.

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