KR101757910B1

KR101757910B1 - Multipurpose sheet having improved water-absorption force and its manufacturing method

Info

Publication number: KR101757910B1
Application number: KR1020150078838A
Authority: KR
Inventors: 전영철
Original assignee: (주)국제리프라텍
Priority date: 2015-06-03
Filing date: 2015-06-03
Publication date: 2017-07-14
Also published as: KR20160142954A

Abstract

The present invention relates to a multi-purpose sheet containing SAM and pulp and having improved water absorption ability, and more particularly, to a multi-purpose sheet having improved moisture absorbing ability, including SAM, Is used as an environmentally friendly plant mulching mat to prevent the soil that grows from vegetation from drying, which can help to grow. In addition to SAM and pulp that can be used for various purposes other than mulching mat, A multi-purpose sheet and a method of manufacturing the same.
The multi-purpose sheet according to the present invention can be used as a mulching mat of an environmentally friendly plant including pulp to prevent the soil from being dried by the plant, The present invention has the effect of reducing environmental pollution by using defective items generated in the manufacturing process of sanitary articles such as a wet tissue paper made of pulp or diapers, sanitary napkin, etc. and sanitary articles disposable after use for producing a multipurpose sheet.

Description

TECHNICAL FIELD The present invention relates to a multi-purpose sheet having improved moisture absorption ability by containing SAM and pulp, and a method for manufacturing the multi-

The present invention relates to a multi-purpose sheet containing SAM and pulp and having improved water absorption ability, and more particularly, to a multi-purpose sheet having improved moisture absorbing ability, including SAM, Is used as an environmentally friendly plant mulching mat to prevent the soil that grows from vegetation from drying, which can help to grow. In addition to SAM and pulp that can be used for various purposes other than mulching mat, A multi-purpose sheet and a method of manufacturing the same.

Super Absorbent Material (SAM) is a synthetic polymer material having a three-dimensional network structure and having a large amount of hydrophilic groups. The super absorbent material absorbs pure water of about 500 to 1,000 times its own weight, It has a function of absorbing about 50 to 70 times of the 0.9% NaCl aqueous solution. When water is absorbed, it does not discharge even if pressure is applied. These SAMs are named with different names such as SAP (Super Absorbent Polymer) and AGM (Absorbent Gel Material).

Such a superabsorbent resin has started to be put into practical use as a feminine hygiene article and is currently being used for sanitary articles such as diapers for children and adults, as well as soil repair agents for horticultural use, exponents for civil engineering and construction, sheet for seedling growing, , And as a material for fomentation and the like.

Such a superabsorbent resin is generally prepared by dissolving an unsaturated compound such as acrylic acid and an alkaline compound in a water solvent to form an aqueous liquid monomer composition containing the unsaturated compound or an alkali salt thereof and proceeding polymerization thereon.

On the other hand, mulching films, mulching sheets and mulching mats are used to prevent the growth of weeds by blocking sunlight around planted plants, and to keep the soil warm and humid so that plant growth can be smoothly performed. Mulching films and mulching sheets produced, and mulching mats made of nonwoven fabrics such as dark black or dark green or brown.

The effect of mulching is promoting early growth by elevation of temperature, inhibiting water evaporation from soil surface, preventing loss of fertilizer, and suppressing weeds. It also prevents disease scattering by raindrops. Insecticide coatings in rice fields are generalized and have a great effect in growing southern crops. Especially in recent years, orchards have also contributed greatly to improving quality such as controlling maturity and improving sugar content.

In addition, planting seedlings is planted in the plantation to increase the economic effect and forests. By installing a mulching mat around the plantation, the weeds breed and obstruct the photosynthesis by interfering with the sunlight and take away the nutrients of the soil. It is possible to prevent the seedling from being damaged and, in severe cases, to prevent the seedlings from being killed.

However, the conventional mulching film, mulching sheet and mulching mat as described above can not absorb moisture, and when it rains or gives a lot of water, the water absorbed by plants and soil evaporates all the remaining water and does not rain, There is a problem that the surrounding environment is dried and the soil is hardened and the plant is not grown.

Korean Patent Publication No. 10-1447656 Korean Patent Registration No. 10-1261709

Disclosure of Invention Technical Problem [8] Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and an object of the present invention is to provide a multi-purpose sheet comprising a pulp and a SAM, which absorbs water, A multi-purpose sheet containing SAM and pulp and having improved water absorption ability, and a method for producing the same.

Another object of the present invention is to provide a method for producing a plant which is eco-friendly by containing pulp and used as a mulching mat for growing plants, absorbing water remaining after absorption of plants and soil in case of rain or water, In addition to being able to prevent dryness, absorbed water is slowly evaporated to supply water to the plant's periphery, it can help plant growth, and also includes SAM and pulp that can be used for various purposes other than mulching mat, An improved multi-purpose sheet and a manufacturing method thereof.

The multi-purpose sheet containing SAM and pulp and improved water absorption ability according to the present invention comprises 35 to 65% by weight of the pulverized product of sanitary ware, 30 to 50% by weight of thermoplastic resin and 1 to 15% by weight of SAM, The sanitary ware pulverized product comprises 10-30 parts by weight of SAM, 30-50 parts by weight of pulp, and 30-40 parts by weight of PP and PE, based on 100 parts by weight of the pulverized product of the sanitary ware.

A method for manufacturing a multi-purpose sheet comprising SAM and pulp and improved water absorption capability according to the present invention includes preparing a sanitary article by separating it into a sanitary article and a defective sanitary article (S10); (S20) of removing the foreign substances by treating the absorption inhibitor in the preparation of the waste sanitary article prepared in the preparation step (S10) to suppress the absorption power of the SAM; A shattering step (S30) of crushing the sanitary article having been subjected to the preparing step (S10) and the foreign matter removing step (S20) to a size of 10 to 100 mm; A crushing step (S40) of crushing the sanitary ware crushed in the crushing step (S30) into a fiber form having a size of 1 to 5 mm using a crusher; A mixing / conveying step (S50) in which the sanitary ware, the SAM powder and the thermoplastic resin pulverized in the pulverizing step (S40) are mixed while being fed by a screw conveyor to produce a sheet composition; A compressing step (S60) of compressing the sheet composition produced in the mixing / conveying step (S50) using a compressor; A melting step (S70) of melting the compact produced in the compressing step (S60) in a melting machine to produce a mixture; A molding step (S80) in which the mixture produced in the melting step (S70) is injected into an extruder and extruded by T-DIE; A producing step (S90) of forming a multi-purpose sheet by passing the molding formed in the forming step (S80) through calenders and pressurizing; And a cutting step (S100) of cutting the multi-purpose sheet produced in the producing step (S90).

As described above, according to the present invention, since the multi-purpose sheet containing SAM and pulp and having improved water absorption ability is excellent in water absorption ability, water is absorbed and discharged, have.

It is also environmentally friendly, containing pulp and used as a mulching mat for plant growth. It prevents evaporation of water from the soil where the plant grows and prevents moisture from being supplied to the main surface of the plant, , A mulching mat and SAM and pulp which can be utilized for various purposes, and which has improved water absorption ability, and a manufacturing method thereof.

In addition, since it uses defective products generated in the manufacturing process of sanitary articles such as a wet tissue paper or a sanitary article such as a diaper and a sanitary napkin, and sanitary articles disposable after use for producing a multi-purpose sheet, environmental pollution can be reduced.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a flow chart of a method for manufacturing a multipurpose sheet in which a SAM and pulp are included according to a preferred embodiment of the present invention to improve water absorption capacity. FIG.

Advantages and features of embodiments of the present invention and methods of achieving them will become apparent with reference to the embodiments described in detail below with reference to the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. To fully disclose the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout the specification.

In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. The following terms are defined in consideration of the functions in the embodiments of the present invention, which may vary depending on the intention of the user, the intention or the custom of the operator. Therefore, the definition should be based on the contents throughout this specification.

The present invention relates to a multipurpose sheet (hereinafter, referred to as a "multipurpose sheet") containing SAM and pulp and having improved water absorption ability, and a method of manufacturing the same. (Hereinafter referred to as "poor sanitary articles") and sanitary articles (hereinafter referred to as "sanitary articles") which are disposed of after being used in the manufacturing process of sanitary articles such as diapers and sanitary napkins (Hereinafter, the names of 'bad sanitary article' and 'waste sanitary article' are referred to separately, and when referring to both 'bad sanitary article' and 'waste sanitary article' Sanitary goods'.)

Specifically, the multi-purpose sheet of the present invention

The sanitary article pulverized product may be composed of 35 to 65% by weight of the pulverized product of the sanitary ware, 30 to 50% by weight of the thermoplastic resin and 1 to 15% by weight of the SAM, 10 to 30 parts by weight, 30 to 50 parts by weight of pulp and 30 to 40 parts by weight of PP and PE.

Most of the sanitary articles used in the present invention are divided into bad hygiene articles which are manufactured in one-time use, and which are used in the manufacturing process, and which are discarded. Since bad sanitation products do not have proper treatment methods other than incineration and landfilling and they do not contain foreign substances, they do not have to be subjected to a separate process before the grinding operation. However, since the waste sanitary products contain foreign matters such as dirt, Removing or separating the water from the water. In this case, there is a method of using water or a method of treating in a dry state without using water.

A method of using water during the process of removing or separating foreign matter from the sanitary articles may be an absorption inhibiting treatment to prevent the SAM contained in the sanitary articles from absorbing water. The absorption-inhibiting treatment is generally carried out in the form of a starch, a cellulose or a polyacrylic acid salt, a polyvinyl alcohol, a polyacrylamide, It is preferable to treat the absorption inhibitor mixture which suppresses the absorption power of the SAM composed of a synthetic resin such as ethylene or polyoxyethylene.

At this time, the absorption inhibitor mixture used in the absorption inhibition treatment generally uses a known absorption inhibitor mixture, but in the present invention, the absorption inhibitor mixture in which water and sodium chloride are mixed in a certain ratio or the mixture of 70-90 wt% of water and calcium chloride or sodium chloride, 30% by weight of an absorption inhibitor may be used.

In particular, among the absorption inhibitor mixture, the absorption inhibitor in which water and the wastewater are mixed at a certain ratio has a lower absorption capacity of the SAM having several hundred times the weight of the SAM, An effect of suppressing moisture absorption can be obtained. The salinity of the jugular water is preferably at least 20%, and the ratio of water to jugular water is freely adjustable by those skilled in the art according to the regulation of the absorption suppression treatment time according to the ratio of the water as the absorption inhibitor.

In addition, by using an absorption inhibitor mixture in which water and calcium chloride or sodium chloride are mixed at a certain ratio as an absorption inhibitor, it is possible to obtain an effect of partially dissolving the SAM contained in the pulmonary hygiene product, thereby lowering the absorption power.

At this time, if the ratio of the calcium chloride or sodium chloride contained in the absorption inhibitor mixture is less than 10% by weight, the absorption inhibiting power against SAM is weak, so that the SAM absorbs excessive amounts of water during the absorption inhibition treatment, , The concentration of calcium chloride or sodium chloride is excessively high and an excessive amount of calcium chloride or sodium chloride is contained in the pulverized product after the pulverization, so that the absorption inhibitor having a ratio of 70 to 90% by weight of water to 10 to 30% by weight of calcium chloride or sodium chloride It is preferable to use a mixture.

After the absorption inhibition treatment, a washing treatment is performed, which is a treatment for removing solid matter which may be contained in the waste sanitary article. Water is added to the waste sanitary article including the SAM whose absorption is suppressed, Any conventional cleaning treatment method may be used for the cleaning. In addition, according to the judgment of a person skilled in the art, the washing treatment may be carried out before the absorption inhibition treatment, and when the washing treatment is performed before the absorption inhibition treatment, it is obvious that the treatment is carried out in a dry state without using water, It is also possible to perform absorption suppression and washing treatment.

The bad sanitary articles and the cleaned sanitary articles are crushed in the form of fine fibers to produce the sanitary articles.

In the sanitary article pulverized product, the thermoplastic resin and the SAM are additionally added and mixed without the organic solvent or the foaming agent, and the water-absorbing sheet for multi purpose is produced through melting and extrusion molding.

Such a multipurpose sheet can be used variously because it has water absorbing ability, for example, it can be used as a mulching mat to help plant growth. In this case, the mulching mat using the multi-purpose sheet of the present invention contains SAM, thereby absorbing water to prevent evaporation of the surrounding soil and releasing the absorbed water to the air to provide moisture to the surrounding area, You can give.

In dry weather, the moisture absorbed in the SAM can be evaporated into the dry air to provide a moisturizing effect, and can be molded into various shapes and sizes to be applied in various cases. The use of the multi-purpose sheet is limited to mulching mat Of course not.

In addition, the multipurpose sheet does not cause environmental pollution due to natural decomposition even when natural pulp is added to the ground, absorbing the water absorbed by the soil, preventing the soil from being excessively wetted, and preventing landslides.

The pulp contained in the sanitary ware pulverized product of the present invention is a natural pulp generally constituted of sanitary articles and is an aggregate of cellulose fibers obtained by mechanical, chemical or intermediate methods in wood or other fiber plants, It is preferable that the water absorbing power is fast, the water permeability is good, and the water evaporation power is excellent, so that it is mixed with SAM. It is also possible for those skilled in the art to use natural pulp and SAM directly without pulverizing sanitary ware.

In addition, the sanitary ware pulverized product of the present invention may include a polymer material, and the polymer material may be composed of PP and PE.

The sanitary article pulverized product may be contained in the multipurpose sheet in an amount of 35 to 65% by weight. If the proportion of the sanitary article pulverized product contained in the multipurpose sheet is less than 35% by weight, the ratio of the added SAM and the thermoplastic resin increases, There is a problem in that the production cost of the multipurpose sheet is increased, and when it is more than 65% by weight, there is a problem that the multipurpose sheet has increased hardness and weight.

The multi-purpose sheet according to the present invention may further contain 1 to 15% by weight of SAM in addition to the SAM contained in the pulverized product of the sanitary ware according to the required degree of moisture absorption, so that the SAM of 4.5 to 34.5 Weight% can be included. If the content of SAM is less than 4.5% by weight, the amount of water absorption is not sufficient and the effect of absorbing moisture can not be expected. If the content exceeds 34.5% by weight, the proportion of thermoplastic resin decreases to lower the strength of the multipurpose sheet. And the effect is not remarkable.

The thermoplastic resin of the present invention may be selected from the group consisting of a polyvinyl chloride (PVC) resin, a polystyrene (PS) resin, a polyethylene (PE) resin, a polypropylene (PP) resin, And a polyamide resin, and is further added to the PE and the PP of the sanitary ware pulverized product so that the strength of the multi-purpose sheet can be reinforced.

The thermoplastic resin is most preferably composed of at least one of a polyethylene (PE) resin and a polypropylene (PP) resin which are the same as the PE and the PP contained in the sanitary article pulverized product, Thereby realizing the effect of facilitating the mixing.

The thermoplastic resin may be contained in an amount of 30 to 50% by weight based on 100% by weight of the multi-purpose sheet. If the amount of the thermoplastic resin contained in the sheet is less than 30 wt%, the proportion of the sanitary article pulverized increases, which increases the hardness and weight of the multipurpose sheet. If the amount exceeds 50 wt% And the ratio of the SAM added to the pulverized product of the sanitary ware and the SAM added separately is reduced, so that there is a problem that the water absorption capacity of the multi-purpose sheet to be finally molded is lowered.

Accordingly, the multipurpose sheet of the present invention comprises 35 to 65% by weight of the sanitary article pulverized product, 1 to 15% by weight of SAM added separately from the SAM contained in the pulverized product of sanitary products, and 30 to 50% by weight of the thermoplastic resin As a result, the sheet composition has a final composition ratio of 4.5 to 34.5% by weight of SAM, 40.5 to 76% by weight of thermoplastic resin, and 10.5 to 32.5% by weight of pulp. That is, when a multi-purpose sheet is produced by using pulp, SAM, and thermoplastic resin directly without using a crushed sanitary article, such a composition ratio can be produced.

In addition, the above-mentioned sheet composition may further contain a decomposing activator which allows the multi-purpose sheet of the present invention to be naturally decomposed. Examples of the decomposing activator include a biodegradation activator which is decomposed by microorganisms, Active agents may be used.

Starch can be used as the biodegradation activator. The starch of the present invention can be selected from starches prepared from corn starch, potato starch and rice starch as well as acid starch, ester starch, amphoteric starch and mixtures thereof Can be used. In this case, the starch may be added in an amount of 10 to 30 parts by weight based on 100 parts by weight of the sheet composition. If the starch is less than 10 parts by weight, the biodegradation rate of the multi-purpose sheet is lowered, The strength of the multi-purpose sheet is deteriorated.

Further, a binder for chemically bonding the starch and the sheet composition may be further added. As the binder, at least one selected from maleic anhydride, methacrylic anhydride, and maleimide is added in an amount of 0.005 - 5 parts by weight. If the amount of the binder is less than 0.005 parts by weight, the starch and the sheet composition may not be mixed. If the amount exceeds 5 parts by weight, the properties of the multi-purpose sheet may be deteriorated.

Examples of the photodegradation activator include metal components such as iron (Fe), zinc (Zn), manganese (Mn), and titanium (Ti) that accelerate oxidation of the thermoplastic resin, and metal components such as oleic acid, stearic acid, manganese oleate, manganese stearate, ), Iron (II) stearate or a mixture thereof may be added in an amount of 0.01 to 5 parts by weight, preferably 0.1 to 3 parts by weight, based on 100 parts by weight of the sheet composition. If the amount of the photo-decomposing activator is less than 0.01 part by weight, the photo-decomposing effect is insufficient and the multi-purpose sheet can not be decomposed smoothly. If the amount is more than 5 parts by weight, the use time is shortened.

Since the photodegradation period of the multi-purpose sheet is changed depending on the proportion of the photodegradation activator, the life of the multi-purpose sheet can be arbitrarily determined by controlling the decomposition and decomposition induction time of the multi-purpose sheet according to the amount to be added. That is, if the expected use period of the multi-purpose sheet is short, the photodegradation activator should be added at a high rate so that the photodegradation is started at a early stage. If the expected period of use is long, the photodegradation activator is not added, To initiate photodecomposition at a later time.

In addition, when the photocatalyst is used together with a small amount of photoresist, photodegradation activator can exhibit better photolytic ability. As such a photosensitizer, an iron-based compound can be used, and specifically, at least one selected from the group consisting of ferric acetylacetonate, ferric diethyldithiocarbamate, ferric stearate and ferric palmitate can be used. The photosensitive agent may be added in an amount of 0.005 to 0.01 part by weight based on 100 parts by weight of the sheet composition. When the amount of the photosensitizer is less than 0.005, there is a problem in that the photodegradation ability of the photodegradation activator is not improved. When the amount is more than 0.01 part by weight, the properties of the multi-purpose sheet are affected.

The mulching sheet as an example of the use of the multi-purpose sheet having the above-described structure is naturally decomposed, so there is an advantage that foreign matter is not left on the soil where the plant grows, so that the surrounding environment is not harmed.

A method of manufacturing a multi-purpose sheet according to the present invention comprises preparing a sanitary article separated into a sanitary article and a defective sanitary article (S10); A crushing step (S30) of crushing the sanitary article to a size of 10 to 100 mm; A crushing step (S40) of crushing the sanitary ware crushed in the crushing step (S30) into a fiber form having a size of 1 to 5 mm using a crusher; A mixing / conveying step (S50) in which the sanitary ware, the SAM powder and the thermoplastic resin pulverized in the pulverizing step (S40) are mixed while being fed by a screw conveyor to produce a sheet composition; A compressing step (S60) of compressing the sheet composition produced in the mixing / conveying step (S50) using a compressor; A melting step (S70) of melting the compact produced in the compressing step (S60) in a melting machine to produce a mixture; A molding step (S80) in which the mixture produced in the melting step (S70) is injected into an extruder and extruded by T-DIE; A producing step (S90) of forming a multi-purpose sheet by passing the molding formed in the forming step (S80) through calenders and pressurizing; And a cutting step S100 of cutting the multipurpose sheet produced in the producing step S90.

(S20) for removing the foreign substance by controlling the absorbency of the SAM by treating the absorption inhibitor in the waste sanitary article when the sanitary article prepared in the preparing step S10 includes the waste sanitary article have.

The preparing step S10 is a step of preparing a sanitary article, which is prepared by separating sanitary articles into bad sanitary articles and sanitary articles. At this time, the defective sanitary article is crushed without removing the foreign substance removing step (S20), and the waste sanitary article is crushed after the foreign object removing step (S20).

Next, the foreign substance removing step (S20) is a step of treating the absorption inhibitor to the waste sanitation product prepared in the preparation step (S10) to suppress the absorption power of the SAM and remove the foreign substance. It is preferable to remove the foreign matter of the absorbent article or the absorbent article of the present invention, and it is preferable that the absorbent article of the present invention is an absorbent article, , Then water is added to the pulmonary hygiene articles, including the SAM with reduced absorption, and the soil is washed. Herein, the absorption inhibitor or the absorption inhibitor mixture used in the absorption inhibition treatment has been described in detail above, so that it is omitted.

Next, the crushing step S30 is a step of crushing the sanitary article having been subjected to the preparing step S10 and the foreign substance removing step S20 to a size of 10 to 100 mm. The crushing step S30 is a step of crushing the sanitary article having the crushing impeller Or it is crushed by the inlet. In this case, the size to be crushed is a size that is easy to crush into a fiber form by a crusher in a subsequent crushing stage. When crushed to less than 10 mm, crushing in a crusher is not easy, and when it exceeds 100 mm, crushing time .

Next, the crushing step (S40) is a step of transferring the sanitary ware crushed in the crushing step (S30) to a conveyor, putting it in a crusher, and crushing it into a fiber form, which is crushed to a size of 1 to 5 mm. At this time, if the size of the crushed sanitary article is less than 3 mm, the strength of the multi-purpose sheet is too weak. If the size of the crushed sanitary article is more than 5 mm, the shape of the multi-purpose sheet finally obtained is not uniform.

In addition, when the pulverized material is transferred to the screw conveyor, the pulverized material is recovered without passing through the perforated network, and is returned to the pulverizer. This process can be repeated to minimize the occurrence of waste.

Next, the mixing / conveying step S50 is a step of preparing a sheet composition by mixing the sanitary articles pulverized into a fiber form, the SAM powder and the thermoplastic resin by a screw conveyor in the pulverization step S40, The thermoplastic resin and the SAM are added to the pulverized product, and the pulverized product is transferred to the compressor while mixing. At this time, the thermoplastic resin is preferably added in the form of single fiber yarn, and the SAM may be added in the form of powder.

In addition, the thermoplastic resin may be added by being injected by a spraying device, and the spraying device may be provided in plural in equal intervals along the conveyance direction of the sheet composition, or may be arranged in a uniform manner in the spiral direction Is preferably distributed.

In addition, the sheet composition produced in the mixing and conveying step (S50) may be further subjected to a decomposing activator addition step (not shown) in which a decomposing activator is added to the sheet composition before the following compression step (S60) is performed.

Next, the compression step S60 is a step of compressing the sheet composition produced by the mixing and conveying step (S50) using a compressor. The sheet composition is stirred and mixed to maintain a mixed state without being separated by specific gravity or density So that melting in the following melting step (S70) is facilitated.

Next, the melting step (S70) is a step of melting the compact produced in the compressing step (S60) in a melting machine to produce a mixture, and the pulverized material contained in the sheet composition and the SAM and the thermoplastic resin There is an effect to be combined. In this case, the melting step (S70) may include a primary melting to melt at 150 to 220 deg. C and a secondary melting to melt at 200 to 250 deg.

Next, the forming step S80 is a step of putting the mixture produced in the melting step (S70) into an extruder and extruding the mixture by T-DIE, and compressing the mixture in the middle between the cooling roll and the pressing roll to fix. It is obvious that the T-DIE to be used can be selected and used by the operator among the conventional T-DIE which can prevent the property change of the molded article due to the temperature change of the mixture and control the thickness of the produced molded article. At this time, the thickness of the molded article may be 3 to 6 mm.

Next, the manufacturing step S90 is a step of fabricating the multi-purpose sheet by passing the molding formed in the forming step S80 through the calenders and pressurizing the molding. So that the multi-purpose sheet having a constant thickness can be continuously formed at a high speed. At this time, the thickness of the multi-purpose sheet can be made 0.5 to 2 mm, and the calenders to be used can be selected and used by the operator among calenders generally used.

Next, the cutting step S100 is a step of cutting the multi-purpose sheet produced in the producing step S90 according to the shape and size according to the purpose of use, and cutting the sheet into a predetermined size and shape according to the judgment of a person skilled in the art .

Hereinafter, embodiments of a method for manufacturing a multi-purpose sheet according to the present invention are described.

1. Prepare poor hygiene products and shred to size of 10 ~ 100mm.

2. The shredded fragments are pulverized into a fiber form having a size of 1 to 5 mm, and the pulverized product of the sanitary article having passed through the perforated network is mixed with the SAM and the thermoplastic resin which are fed while being fed by a screw conveyor to constitute a sheet composition, Mixed and transported to the compressor. At this time, the composition is mixed at a composition ratio of 35 to 65% by weight of the sanitary ware pulverized product, 1 to 15% by weight of the SAM and 30 to 50% by weight of the thermoplastic resin with respect to 100% by weight of the sheet composition.

3. The sheet composition conveyed to the compressor is compressed to a predetermined size, and is transferred to a melting machine, melted and mixed to produce a mixture.

4. The mixture is placed in an extruder and extruded with T-DIE to form a sheet having a thickness of 3 to 6 mm. The formed sheet is passed between calenders to pressurize the sheet to form a multi-purpose sheet having a thickness of 0.5 to 2 mm.

5. Cut the prepared multipurpose sheet to the required size and shape.

1. After preparing the bad sanitary products and the sanitary products, the sanitary products should be absorbed and cleaned. In this case, it is dried by using water. Then shred the sanitary article to 10 ~ 100mm size.

5. Cut the prepared multipurpose sheet to the required size and shape.

2. The shredded fragments are pulverized into a fiber form having a size of 1 to 5 mm, and the pulverized product of the sanitary article having passed through the perforated network is mixed with the SAM and the thermoplastic resin which are fed while being fed by a screw conveyor to constitute a sheet composition, Mixed and transported to the compressor. At this time, the composition is mixed at a composition ratio of 35 to 65 wt% of the sanitary ware pulverized product, 1 to 15 wt% of the SAM and 30 to 50 wt% of the thermoplastic resin, based on 100 wt% of the sheet composition.

5. Cut the prepared multipurpose sheet to the required size and shape.

1. Prepare poor hygiene products and shred to size of 10 ~ 100mm.

5. Cut the prepared multipurpose sheet to the required size and shape.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It will be readily apparent that such substitutions, modifications, and alterations are possible.

Claims

In the multi-purpose sheet,
Wherein the multipurpose sheet comprises 35 to 65% by weight of a sanitary article pulverized product; 30 to 50% by weight of a thermoplastic resin; And 1 to 15 wt% of SAM,
The sanitary ware pulverized product may comprise 10 to 30 parts by weight of SAM, 30 to 50 parts by weight of pulp; And 30 to 40 parts by weight of PP and PE,
The multi-purpose sheet may further contain a photo decomposition activator, a biodegradation activator and a binder,
The photo decomposition activator is at least one selected from oleic acid, stearic acid, manganese oleate, manganese stearate, iron (II) oleate and iron (II)
The biodegradation activator is at least one selected from the group consisting of corn starch, potato starch and rice starch, starch comprising acid starch, ester starch, amphoteric starch and mixture thereof.
The binder is at least one selected from maleic anhydride, methacrylic anhydride, and maleimide,
Characterized in that SAM is contained in an amount of 4.5 to 34.5% by weight based on 100% by weight of the multi-purpose sheet.

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