KR100974639B1 - Biodegradable resin composition for film and pot, biodegradable film and pot and manufacturing method thereof - Google Patents

Abstract

The present invention is an agricultural film (vinyl house and mulching) and disposable pots that can control the biodegradability according to the growth conditions of the crop and the organic / inorganic soil improver is added to help crop growth after decomposition. The present invention relates to a biodegradable resin composition which can be prepared, and a biodegradable agricultural film and disposable flower pot produced using the same, and a method of manufacturing the same. The present invention, polybutylene succinate (PBS) or polybutylene succinate adipate in order to solve the problems of existing raw materials (LDPE, LLDPE, HDPE, PP, etc.) that do not decompose in the soil causing pollution (PBSA) is mixed with polylactic acid (PLA) to prepare a raw material, but polybutylene succinate and polybutyl have improved properties for the production of films or sheets (materials of pots) It is characteristic that the lens succinate adipate is used, and especially the functionality is provided by adding functional additives, such as a soil improvement agent.

Description

Biodegradable resin composition for manufacturing agricultural film and flowerpot, biodegradable agricultural film and flowerpot using same and method for manufacturing same {Biodegradable resin composition for film and pot, biodegradable film and pot and manufacturing method

The present invention relates to a biodegradable resin composition and its use, and more particularly, a biodegradable resin composition capable of manufacturing agricultural films (for vinyl houses and mulching) and disposable flower pots, and biodegradable agricultural products prepared using the same. It relates to a film and a disposable flower pot and a method of manufacturing the same.

Weed control for rice farming over the last few centuries has led to a decline in productivity and an increase in production costs, depending on manpower, but with the development of chemical synthetic herbicides in the early 20th century, labor savings and productivity gains have been achieved.

However, excessive use of herbicides has contaminated soil and water quality, destroying ecosystems and distrusting the safety of agricultural products themselves.

With the growing interest in environmental protection and safe farm products, the demand for organic farm products is increasing.

As a result of organic farming, farmers are replacing synthetic fertilizers with organic fertilizers, which can be cultivated with a slight yield reduction using varieties that are resistant to pests.

As a means for controlling weeds, various farming methods (weeding methods) using chaff, thunder, duck, etc. have been developed, but the disadvantages of using the method are cumbersome, additional labor and cost, and yields are further reduced.

Recently, mulching cultivation techniques have been used to overcome the disadvantages of organic weed control.

Mulching cultivation technology is an agricultural technology to cover the soil with transparent or opaque plastic film or paper, to suppress the occurrence of weed and soil parasitic pests, to promote the growth of crops (for example, red pepper), and to improve the yield. .

In other words, the mulch film such as polyethylene or polyvinyl chloride is covered with soil in order to suppress weeding of crop fields or to prevent soil from falling in the rainwater during warming, moisturizing and raining, and to create an optimum environment for growing crops. .

The mulching film may be fluttered or torn by the wind, in order to prevent this is carried out the installation method of the different mulching film according to the installation location and the target crop.

First, in outdoor field cultivation of peppers or sesame seeds, after forming a toad, mulch the film to the toad, and then buy the two sides in the soil or cover the soil or crest of the furrow on the vinyl.

In addition, in order to prevent the flapping of the mulching film is connected to the pressing line between the furrows and furrows, the wooden bar is placed on the furrows or plugged into the soil to connect and fix the pressing lines.

However, materials such as black or transparent plastic mulching films (manufactured with LDPE, LLDPE, and HDPE) that are currently used are not decomposed in the soil, so they are not only troublesome to remove after use, but also completely removed by manual removal. It is not possible and additionally has problems that cause soil pollution and environmental pollution.

In addition, existing agricultural mulching films have various problems such as environmental hormone leakage, air pollution during incineration, difficulty in selecting landfills, and abandoned waste film harming rural landscape.

On the other hand, paper mulching is decomposed after use, so there is no additional environmental pollution, but if decomposition occurs before the colony of crops is formed in fresh water, it is not effective for weed control, and the production cost increases due to the high price of wood pulp and imported algae. There are disadvantages.

In addition, agricultural pollen can be used as a high-use article among the items that can be easily discarded or left unused after use in rural areas, causing environmental pollution and harming rural landscape.

Agricultural flower pots are mainly used for seedlings or sowing, and are used in the form of disposable or multi-potted plants.In case of seedling pots, they are used only to grow seedlings. Pots are often left unattended on farmland or fields because they are only planted.

Agricultural pollen as described above is a factor that greatly harms the rural environment because it has to be discharged in large quantities for the purpose and use.

In particular, agricultural disposable flower pots (manufactured with PE and PP) also have troubles to remove after use, and have various problems such as environmental hormone leakage, air pollution during incineration, and difficulty in selecting landfills.

In addition, although a biodegradable mulching film has been developed in the past, it is used by mixing a starch, a complex decomposition additive in a matrix resin such as polycaprolactone, it is impossible to control the rate of decomposition to all crops with different growth periods There is no way to apply it.

In particular, long-growing crops are degraded long before the crop is harvested, and the mulching effect is reduced. Even short-growing crops have difficulties in cultivating the next crop due to undecomposed mulching film after harvesting. It has several problems.

Therefore, the present invention has been invented to solve the above problems, in order to solve the problems of existing raw materials (LDPE, LLDPE, HDPE, PP, etc.) that do not decompose in the soil causing pollution, the growth conditions of crops Biodegradable resin that can control biodegradability and produce agricultural film (for vinyl house and mulching) and disposable flower pots, which play a role in helping crop growth after decomposition by adding organic / inorganic soil improver. It is an object of the present invention to provide a composition, a biodegradable agricultural film and a disposable flower pot produced using the same, and a method of manufacturing the same.

In order to achieve the above object, the present invention, polybutylene succinate-based biodegradable polymer resin of 1 to 50% by weight, polylactic acid 20 to 90% by weight, compatibilizer 0.5 ~ It provides a biodegradable resin composition for producing agricultural films and pots comprising 20% by weight, soil improver 0.5-30% by weight, and additives 0.5-5% by weight.

Here, the polybutylene succinate-based biodegradable polymer resin synthesizes 35 to 55% by weight of 1,4 butanediol, 40 to 64% by weight of succinic acid, and 0.1 to 10% by weight of catalyst and additives. It is characterized in that the polybutylene succinate (PBS) prepared by.

In addition, the polybutylene succinate-based biodegradable polymer resin is 1,4 butanediol 35 to 55% by weight, succinic acid 40 to 60% by weight, adipic acid 1 to 20% by weight And it is characterized in that the polybutylene succinate- adipate (polybutylene succinate-co-adipate, PBSA) prepared by synthesizing 0.1 to 10% by weight of the catalyst and additives.

In addition, the polybutylene succinate adipate is 0.5 to 10% by weight of propylene glycol, 0.5 to 15% by weight of diethylene glycol, and 0.1 to 2% by weight of tetrahydrophthalic anhydride. It characterized in that the manufacture further comprises one or two or more of them.

In addition, the soil improving agent is characterized in that one or two or more selected from palm oil, chitosan, stearic acid, twin series and span series of organic materials, talc, barium sulfate, lime, silica, nanoclay, alumina, zirconia.

In addition, the present invention, polybutylene succinate-based biodegradable polymer resin 1 to 50% by weight, polylactic acid 20 to 90% by weight, compatibilizer 0.5 to 20% by weight, soil improver 0.5 A raw material manufacturing step of preparing a biodegradable raw material using a biodegradable resin composition comprising 30 wt% to 0.5 wt% of an additive; It provides a method for producing a biodegradable agricultural film comprising; forming a film using the raw material.

 In addition, the present invention, polybutylene succinate-based biodegradable polymer resin 1 to 50% by weight, polylactic acid 20 to 90% by weight, compatibilizer 0.5 to 20% by weight, soil improver 0.5 A raw material manufacturing step of preparing a biodegradable raw material using a biodegradable resin composition comprising 30 wt% to 0.5 wt% of an additive; Forming a sheet using the raw material; It provides a method for producing a biodegradable agricultural plant pots comprising; forming the molded sheet into a potted shape.

In addition, the present invention, polybutylene succinate-based biodegradable polymer resin 1 to 50% by weight, polylactic acid 20 to 90% by weight, compatibilizer 0.5 to 20% by weight, soil improver 0.5 It provides a biodegradable agricultural film, characterized in that prepared using a composition comprising a ~ 30% by weight, and 0.5 to 5% by weight of the additive as a raw material.

Here, the soil improving agent is characterized in that one or two or more selected from palm oil, chitosan, stearic acid, twin series and span series of organic materials, talc, barium sulfate, lime, silica, nanoclay, alumina, zirconia.

In addition, the present invention is a polybutylene succinate-based biodegradable polymer resin of 1 to 50% by weight, polylactic acid 20 to 90% by weight, compatibilizer 0.5 to 20% by weight, soil improver 0.5 ~ It provides a biodegradable agricultural pollen, characterized in that manufactured using a composition comprising 30% by weight, and 0.5 to 5% by weight of the additive as a raw material.

Here, the soil improving agent is characterized in that one or two or more selected from palm oil, chitosan, stearic acid, twin series and span series of organic materials, talc, barium sulfate, lime, silica, nanoclay, alumina, zirconia.

Accordingly, the present invention has the following effects.

1) It is possible to manufacture a biodegradable film (for vinyl house and mulching) and pollen, the film and pollen produced by the present invention is not possible to recover because it has the advantage that it can be easily decomposed in the natural environment. Even if it is possible to minimize environmental pollution.

2) It can solve various problems such as environmental hormone leakage, air pollution during incineration, difficulty in selecting landfills, and abandoned waste film harming rural landscape.

3) The decomposition rate can be easily adjusted by appropriately adjusting the content of the composition, and there is an advantage such that it can be used as a manure after decomposition by adding a functional additive. In particular, the use of functional additives can be expected to have the effect of antibacterial action and soil improvement.

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

The present invention can control the biodegradability (that is, the decomposition rate) according to the growth conditions of the crop and the organic / inorganic soil improver is added to the agricultural film that serves as a manure to help crop growth after decomposition (for vinyl house and The present invention relates to a biodegradable resin composition capable of producing mulch) and disposable flower pots, and a biodegradable agricultural film and disposable flower pots prepared using the same, and a method of manufacturing the same.

In particular, the present invention, in order to solve the problems of existing raw materials (LDPE, LLDPE, HDPE, PP, etc.) that do not decompose in the soil causing pollution, polybutylene succinate (PBS) or polybutylene A raw material is prepared by mixing polybutylene succinate-co-adipate (PBSA) with polylactic acid (PLA), but the production of a film or sheet (flower material) It is an object to provide polybutylene succinate and polybutylene succinate-adipate having improved physical properties.

In addition, the present invention, so that it can be easily decomposed in the natural environment, such as soil, even if the recovery is not possible to minimize the environmental pollution and also can easily control the decomposition rate according to the growth conditions of the crop, and after the decomposition An improved biodegradable raw material that is possible to play a role is to produce agricultural films (for vinyl houses and mulching) and pollen.

First, the biodegradable resin composition according to the present invention, polybutylene succinate (PBS) -based biodegradable polymer resin 1 to 50% by weight, polylactic acid (hereinafter abbreviated as PLA) 20 to 90% by weight, compatibilizer 0.5 to 20% by weight, soil improver 0.5 to 30% by weight, and additives 0.5 to 5% by weight.

Here, the polybutylene succinate-based biodegradable polymer resin is 1 to 4-butanediol 35 to 55% by weight, succinic acid 40 to 64% by weight, catalyst and additives 0.1 to 10% by weight It may be a polybutylene succinate prepared by synthesizing (hereinafter abbreviated as PBS).

As described above, in the present invention, a biodegradable film that can be used as an agricultural film (for vinyl house and mulching) or a disposable flower pot for agriculture by preparing a raw material by appropriately mixing PBS having the above composition with PLA, a compatibilizer, a soil improving agent, and an additive. It is possible to produce a biodegradable sheet material for producing a.

In particular, when manufacturing a film or sheet material using the biodegradable PBS of the above composition, the physical properties are the same as the existing film or sheet material, but there is an advantage that the biodegradation does not give an environmental burden.

When PBS is used below the above-mentioned range, the content of PLA is so high that the mixed raw materials are similar to those of PLA, exhibiting rigid properties, making it difficult to manufacture a desired film or sheet, and draw strength is lower than necessary. Will be. On the other hand, when the use exceeds the above range, it is not preferable because there is a problem that the flexibility is seriously increased but easily broken.

The PLA is limited to the use range of 20 to 90% by weight, where the content of PBS is too high when added to less than 20% by weight, but there is a problem that is easily broken, but when added in excess of 90% by weight film Or there is a problem that sheet production is difficult or broken without stretching, which is not preferable.

The compatibilizer is prepared by mixing one or two or more of inorganic substances such as silicates such as silica, such as silica, organic oils such as palm oil and castor oil, organic substances such as stearic acid, and organics of twin and span series. Use it.

In addition, the soil improver may include one or two or more of organic materials such as palm oil, chitosan, stearic acid, twin series and span series, and inorganic materials such as talc, barium sulfate, lime, silica, nanoclay, alumina, and zirconia. Can be used.

The organic material is mainly added for antibacterial action and soil improvement, and the inorganic material is added for control of decomposition rate and soil improvement.

In addition, carbon black or a dye for determining the color of the product may be added as the additive, for example, carbon black or black dye for producing a black color may be added.

As described above, in the present invention, the above-described inorganic and organic substances may be appropriately added in order to control the decomposition rate and to act as a manure after decomposition.

When manufacturing a product using the composition as a raw material, the decomposition rate may vary depending on the content of each component, the higher the PBS content for the same PLA content, the slower the decomposition rate, while the content of PBSA The more, the faster the decomposition rate. In addition, the higher the content of the additive, the faster the decomposition rate.

The properties of PLA, PBS and PBSA resins, which are biodegradable resins, are the hardest PLA and the softest PBSA, and the fastest biodegradation is PBSA, which is slower in the order of PLA and PBS.

Therefore, in the case of crops that need to be rapidly decomposed when controlling the biodegradation rate according to the growth rate of the crop, a film having a high content of PBSA is used, and a film having a high content of PBS is used for a crop having a low growth rate.

Degradation rate control can be achieved by controlling the content of compatibilizers, soil improvers, additives added with the content control of PLA, PBS, PBSA.

In addition, when producing a mulching film, when the elongation is good, the workability is improved, such as not easily torn and stretched well, so that the content of each component in the biodegradable resin composition is appropriately adjusted within the above range.

In the composition of PBS according to the present invention, the use range of 1,4 butanediol is limited to 35 to 55% by weight, and when it is added below 35% by weight, the reaction molar ratio does not match in the reaction with succinic acid. Many remain, and eventually there is a problem that the polymer is not formed in forming the polymer. On the other hand, the addition of more than 55% by weight is not preferable because the molar ratio is excessively added compared to the succinic acid there is a problem that the cost rise and the need to remove the unreacted material during the polymer reaction.

In addition, in the case of succinic acid in the composition of the above-described PBS, when added in less than 40% by weight in excess of 1,4 butanediol in the molar ratio with 1,4 butanediol, it is present in the reactant, there is a problem that must be removed during the reaction do. This also raises costs. On the other hand, if it is added in excess of 64% by weight, an excess molar ratio is added compared to 1,4 butanediol, which causes a problem to be removed during the reaction. not.

In addition, the catalyst in the composition of the PBS is a catalyst for the polymerization reaction to make a polymer, using a single or mixed catalyst, titanium (aluminum), aluminum (tin), antimony (antimony) One or two or more of the catalysts in the series are used in combination.

Specific examples of the catalyst may include aluminum acetate basic, tetrabutyl titanate, antimon acetate, dibutyl tin oxide, and the like.

In addition, there are thermal stabilizers and inorganic additives as additives in the composition of PBS, one or two or more of the phosphate, phosphite, phosphine, phosphine acid series Mix and use.

Representative thermal stabilizers may be TMP (trimethyl phosphate), TPP (triphenyl phosphate) and the like.

In addition, the inorganic additive in the composition of PBS is added to improve the physical properties of the synthesized biodegradable polymer, barium sulfate, zirconia, alumina, silica, titania and the like can be used.

On the other hand, polybutylene succinate-based biodegradable polymer resin for producing a raw material for film or sheet material, polybutylene succinate adipate (polybutylene succinate further increased softness and elongation, instead of PBS of the composition described above -co-adipate, hereinafter abbreviated as PBSA) can be used.

PBSA in the present invention is 1,4 butanediol 35 to 55% by weight, succinic acid 40 to 60% by weight, adipic acid (AA) 1 to 20% by weight, and the catalyst and It may be prepared by synthesizing the additive 0.1 to 10% by weight.

The catalysts and additives may be the same as those used in the above-described PAS.

In addition, in the present invention, PBSA is 0.5 to 10% by weight of propylene glycol (propylene glycol, PG), 0.5 to 15% by weight of diethylene glycol (DEG), and tetrahydrophthalic anhydride (Tetrahydrophthalic anhydride) THPA) 0.1 to 2% by weight of one or more prepared by two or more may be used.

Here, propylene glycol is added to increase the crystallinity of the polymer compared to 1,4 butanediol, diethylene glycol is added to increase the elongation. Tetrahydrophthalic anhydride is also added to tilt the molecular structure to mitigate crystal formation.

In addition, as a raw material for producing agricultural films and disposable flower pots, the biodegradable resin composition according to the present invention is a polybutylene succinate (PBS) -based biodegradable polymer resin without using polylactic acid (PLA). And it may be configured to include only soil improvers, additives.

In this case, the polybutylene succinate-based biodegradable polymer resin 65 to 99% by weight, the soil improving agent 0.5 to 30% by weight and comprises 0.5 to 5% by weight of the additive.

When the polylactic acid is not used as described above, it is possible to produce a film and a pollen which are softer and have a higher decomposition rate than when used.

Here, a compatibilizer (which is used to mix PBS or PBSA well with PLA) is not used, and the same may be used as the soil improver and the additive as described above. The biodegradable polymer resin of the polybutylene succinate series may also be PBS or PBSA described above.

As described above, the biodegradable resin composition according to the present invention has been described above. The present invention includes a method for producing a biodegradable agricultural film using the resin composition having the above composition as a raw material.

The film produced by using the resin composition of the above composition as a raw material can be used as a film and mulching film for the vinyl house, and can be usefully used in various agricultural films.

There are two kinds of agricultural films, mainly used for vinyl house and mulching. Among them, the vinyl house has to endure for a long time. Therefore, since the decomposition rate should be very slow and strong against impacts such as wind or snow, it is common to manufacture relatively thick compared to mulching film. The mulching film may be manufactured to a thickness of about 20 μm, a thickness of about 10 μm, and a thickness of about 100 μm.

In another aspect, the present invention comprises a method for producing a biodegradable agricultural pot using the prepared sheet after the sheet is prepared using the resin composition composed of the above composition as a raw material.

First, the manufacturing process of the agricultural film according to the present invention is characterized by using the above-described biodegradable resin composition as a raw material, to prepare a biodegradable film, PBS or PBSA and PLA, a compatibilizer and The process is carried out in the order of the step of preparing a biodegradable raw material by mixing and melting the soil improving agent and additives in the above-mentioned content, and forming a film using the raw material.

1 is a schematic view showing a step of preparing a raw material after melting and mixing the biodegradable resin composition in the present invention.

In the step of preparing the raw material is prepared using the composition of the present invention described above, as shown in Figure 1 PBS or PBSA and PLA, compatibilizers and soil improvers, additives into the melt stirring apparatus 10 to melt at a high temperature And after mixing, it is ejected and extracted for a long time and moved using the conveyor 20 and the like, and then cut with a cutter 30 to obtain a raw material in the form of small grains.

The amount of PBS or PBSA, PLA, compatibilizer, soil improver and additives used to prepare the raw materials is appropriately adjusted according to the use of the product within the content ranges set forth in the present invention.

Thereafter, the step of forming the film by melting the raw material prepared as described above is carried out, in which case the film can be formed by applying a blown blowing method by blowing air, and also formed into a single layer of film by the T-die method can do.

2 is a schematic view showing a process of blow molding a mulching film using a biodegradable raw material in the present invention, wherein the molten raw material is supplied to the extruder 40 at a predetermined pressure, and the raw material is supplied to the extruder 40. Is passed through the molding die 41, and compressed air is supplied through the blowing pipe 42 provided through the molding die 41.

Accordingly, when compressed air is blown through the blowing pipe 42 into the molding 50 discharged through the outlet port 41a of the molding die 41, the molding is inflated into a cylindrical film shape. This is made, and after passing through the guide roller 43 and the pressing roller 44, further stretching is made and wound on the winding roller 45.

The film 51 wound on the winding roller 45 is provided as a mulching film product, which has the same physical properties as those of the existing mulching film and is easily biodegradable in a natural environment, and thus is not recoverable. Even so, environmental pollution can be minimized.

In addition, the manufacturing process of the biodegradable pollen according to the present invention is characterized by manufacturing using the biodegradable resin composition as a raw material, in order to produce a biodegradable pollen, the above-mentioned PBS or PBSA and PLA, a compatibilizer , Mixing and melting the soil improving agent and the additive to the above-mentioned content to prepare a biodegradable raw material, molding the sheet using the raw material, and molding the manufactured sheet into a pot shape. Proceed.

The step of preparing the raw material proceeds in the same manner as the above-described raw material manufacturing process using the apparatus of FIG. 1, and after the raw material is manufactured, the raw material is melted to produce a sheet through a known sheet forming process such as extrusion molding.

Subsequently, the manufactured sheet is made of a pollen shape through a known resin molding process such as press forming, vacuum forming, or press molding. Schematic diagram.

As shown, in the press forming, the sheet 60 is heated to a moldable temperature using the heater 80 while the sheet 60 is fixed to the clamp 70, and the sheet 60 heated to the molding temperature is internally formed into a product shape. After moving to the mold 90 having a space, the air is sucked through the suction port 91 of the mold or a vacuum pressure is applied. The sheet 60 adheres to the inner surface of the mold 90 by the suction force. Be sure to

Thus, the flower pot can be finally molded and manufactured by cooling the molded product 61 while keeping the shape of the product while the sheet 60 is in close contact with the inner surface.

The pollen manufactured in this way has the same physical properties as the standard agricultural pollen, but can be easily biodegraded in the natural environment, thereby minimizing environmental pollution even if recovery is impossible.

Hereinafter, the present invention will be described in more detail with reference to Examples, but the present invention is not limited by the following Examples.

Example

Using the biodegradable resin composition of the present invention as a raw material to prepare a film, the content of each component was prepared as follows.

a) film for vinyl house

PBSA: 15% by weight, PLA: 84% by weight, compatibilizer: 0.5% by weight, soil improver: 0.5% by weight

Here, 0.35% by weight of PLA, 0.015% by weight of silica, 0.135% by weight of castor oil was used, and 0.5% by weight of talc was used as the soil improving agent.

b) paddy and field mulching film 1

PBSA: 37% by weight, PLA: 42% by weight, compatibilizer: 10% by weight, soil improver: 11% by weight

Here, as a compatibilizer, PLA 8% by weight, silica 0.3% by weight, castor oil 1.7% by weight, and as soil improver 0.3% by weight chitosan, 5.7% by weight lime, 4.7% by weight talc, 0.3% by weight stearic acid was used. .

c) field mulching film 1

PBS: 50% by weight, PLA: 20% by weight, compatibilizer: 4.7% by weight, soil improver: 25.3% by weight

Here, 3 wt% PLA, 1.5 wt% silica, 0.2 wt% palm oil were used as the compatibilizer, and 0.2 wt% chitosan, 3.5 wt% lime, 16.8 wt% nanoclay, 4 wt% barium sulfate, and talc 0.5 wt% and palm oil 0.3 wt% were used.

d) mulch film for both rice fields and fields 2

PBSA: 55 wt%, PLA: 20 wt%, Compatibilizer: 5 wt%, Soil improver: 20 wt%

Here, 3% by weight of PLA, 1.5% by weight of silica, 0.5% by weight of palm oil was used as a compatibilizer, 2.5% by weight of lime, 7.5% by weight of nanoclay, 4% by weight of barium sulfate, 5.7% by weight of stearic acid, Palm oil 0.3% by weight was used.

e) field mulching film 2

PBSA: 95% by weight, soil improver: 4.98% by weight, additives: 0.02% by weight

Here, 3.5 wt% of silica, 0.5 wt% of nanoclay, 0.8 wt% of barium sulfate, and 0.18 wt% of talc were used as soil improving agents, and black dye was used as an additive.

In preparing the raw materials for manufacturing the films of a) to e), a compatibilizer was added to solve the problem of not mixing with each other when using polymers of different properties, and to help antibacterial effects and crop growth. Soil improver was added and additives were added to give color. In order to mix the components well, the ingredients were mixed and then heated and melted to 150 ° C. at which the polymer is completely melted to prepare a raw material, and then each material was blown using a) to e). Each film of was prepared.

And, PBS used in the d) was prepared by synthesizing the following raw materials.

The manufacturing conditions were reacted by dividing into 1st ES reaction and 2nd PC reaction. The 1st reaction condition is a high temperature reaction, while reacting at a temperature inside the reactor at 145 ° C to 220 ° C, and the generated water is condensed and removed by a condenser. It was. The secondary reaction conditions were high temperature and high vacuum reactions, and the reaction was carried out at a reaction temperature of 210 ℃ ~ 250 ℃, the reaction pressure was 0.3torr ~ 4.0torr. When the reaction pressure is 4.0torr or more, it takes a long time to react due to the slow reaction rate and at the same time, the synthesized polymer cannot be used due to the carbonization phenomenon when reacting for 4 hours or more. Also, below 0.3torr, the pressure is so low that the low pressure causes the polymer, ie, oligomers, to move towards the vacuum pump or vacuum trap before the reaction. It may clog or contaminate the vacuum pump or cause overload.

1,4 butanediol: 44.9% by weight,

-Succinic acid: 54.3 wt%

Tetrabutyl titanate as catalyst: 0.1 wt%

Aluminum acetate basic as promoter: 0.08% by weight

-Inorganic zirconia as an additive: 0.52% by weight

-Thermal Stabilizer TPP (triphenyl phosphate): 0.2 wt%

And, PBSA used in the a), b), c), e) was prepared by synthesizing the following raw materials.

The manufacturing conditions were reacted by dividing the first ES reaction and the second PC reaction, the first reaction condition is a high temperature reaction to increase the external temperature to 265 ℃ to supply heat to the reactor. This is because AA, DEG, THPA, and the like, which are difficult to react, are mixed, thereby increasing the temperature and increasing the reaction completion rate of these materials. While reacting at a reactor internal temperature of 145 ° C to 220 ° C, the generated water was condensed and removed by a condenser. The secondary reaction conditions were high temperature and high vacuum reactions, and the reaction was carried out at a reaction temperature of 210 ℃ ~ 250 ℃, the reaction pressure was 0.3torr ~ 4.0torr. If the pressure is 4.0torr or more during the reaction, the reaction rate is slow and it takes a long time to react and at the same time, the synthesized polymer cannot be used due to carbonization during the reaction for 4 hours or more. Also, below 0.3torr, the pressure is so low that the low pressure causes the polymers, ie, oligomers, to be reacted and passed to the vacuum pump or vacuum trap due to the low pressure. To prevent or contaminate the vacuum pump.

1,4 butanediol: 39.43 wt%

-Succinic acid: 48.82 wt%

Adipic acid: 5.63 wt%

Diethylene glycol: 5.63 wt%

Tetrahydrophthalic anhydride: 0.23 wt%

Tetrabutyl titanate as catalyst: 0.08% by weight

Aluminum acetate basic as promoter: 0.06% by weight

-Thermal Stabilizer TPP (triphenyl phosphate): 0.12 wt%

1 is a schematic diagram showing a process for preparing a raw material after melting and mixing the biodegradable resin composition in the present invention,

Figure 2 is a schematic diagram showing a process of blow molding a mulching film using a biodegradable raw material in the present invention,

Figure 3 is a schematic diagram showing the process of forming a pot-shaped by pressing the biodegradable sheet in the present invention.

<Explanation of symbols for the main parts of the drawings>

10: melt stirring device 20: conveyor

30: cutting machine 40: extruder

51: film 60: sheet

61: product (flower pot) 70: clamp

80: heater 90: mold

Claims (24)

1 to 50 wt% of a polybutylene succinate-based biodegradable polymer resin; 20 to 90% by weight of polylactic acid; 0.5 to 20% by weight of one or two or more compatibilizers selected from castor oil, twin based organics or span based organics; 0.5 to 30% by weight of one or more soil improvers selected from chitosan, lime, nanoclay, barium sulfate or palm oil; And 0.5 to 5 wt% of an additive selected from carbon black or black dye. 65 to 99 wt% of a polybutylene succinate series biodegradable polymer resin; 0.5 to 30% by weight of one or more soil improvers selected from chitosan, lime, nanoclay, barium sulfate or palm oil; And 0.5 to 5 wt% of an additive selected from carbon black or black dye. The method according to claim 1 or 2, The polybutylene succinate-based biodegradable polymer resin is 1 to 4 butanediol 35 to 55% by weight, succinic acid 40 to 64% by weight, and aluminum acetate basic, tetrabutyl titanate, antimony acetate or Polybutyl prepared by synthesizing 0.1-10 wt% of a catalyst selected from dibutyl tin oxide and one or two or more additives selected from phosphate, phosphite, phosphine, phosphinic acid, barium sulfate, zirconia, alumina, silica or titania Biodegradable resin composition for the production of agricultural films and pots, characterized in that lene succinate (PBS). The method according to claim 1 or 2, The polybutylene succinate-based biodegradable polymer resin is 1,4 butanediol 35 to 55% by weight, succinic acid 40 to 60% by weight, adipic acid 1 to 20% by weight, And one or two or more catalysts selected from aluminum acetate basic, tetrabutyl titanate, antimony acetate or dibutyl tin oxide and selected from phosphate, phosphite, phosphine, phosphinic acid, barium sulfate, zirconia, alumina, silica or titania. Biobutylene succinate adipate (polybutylene succinate-co-adipate, PBSA) prepared by synthesizing the additive 0.1 to 10% by weight of biodegradable resin composition for the production of agricultural films and pots. The method according to claim 4, The polybutylene succinate adipate is contained in 0.5 to 10% by weight of propylene glycol, 0.5 to 15% by weight of diethylene glycol, and 0.1 to 2% by weight of tetrahydrophthalic anhydride. Biodegradable resin composition for the production of agricultural films and pots, characterized in that the production further comprising one or two or more. delete 1 to 50% by weight of polybutylene succinate-based biodegradable polymer resin, 20 to 90% by weight of polylactic acid, one or two selected from castor oil, twin-based organic or span-based organic 0.5 to 20% by weight of at least one compatibilizer, 0.5 to 30% by weight of one or more soil improvers selected from chitosan, lime, nanoclay, barium sulfate or palm oil, and 0.5 to 5 additives selected from carbon black or black dyes Raw material manufacturing step of producing a biodegradable raw material using a biodegradable resin composition comprising a weight%; Molding the film using the raw material; Method of producing a biodegradable agricultural film comprising a. 65 to 99% by weight of polybutylene succinate-based biodegradable polymer resin, 0.5 to 30% by weight of one or more soil improvers selected from chitosan, lime, nanoclay, barium sulfate or palm oil and carbon black Or a raw material manufacturing step of preparing a biodegradable raw material using a biodegradable resin composition comprising 0.5 to 5 wt% of an additive selected from black dyes; Molding the film using the raw material; Method of producing a biodegradable agricultural film comprising a. The method according to claim 7 or 8, The polybutylene succinate-based biodegradable polymer resin is 1 to 4 butanediol 35 to 55% by weight, succinic acid 40 to 64% by weight, and aluminum acetate basic, tetrabutyl titanate, antimony acetate or Polybutyl prepared by synthesizing 0.1-10 wt% of a catalyst selected from dibutyl tin oxide and one or two or more additives selected from phosphate, phosphite, phosphine, phosphinic acid, barium sulfate, zirconia, alumina, silica or titania Method for producing a biodegradable agricultural film, characterized in that the styrene succinate (PBS). The method according to claim 7 or 8, The polybutylene succinate-based biodegradable polymer resin is 1,4 butanediol 35 to 55% by weight, succinic acid 40 to 60% by weight, adipic acid 1 to 20% by weight, And one or two or more catalysts selected from aluminum acetate basic, tetrabutyl titanate, antimony acetate or dibutyl tin oxide and selected from phosphate, phosphite, phosphine, phosphinic acid, barium sulfate, zirconia, alumina, silica or titania. Method for producing a biodegradable agricultural film, characterized in that the polybutylene succinate-co-adipate (PBSA) prepared by synthesizing the additive 0.1 to 10% by weight. The method according to claim 10, The polybutylene succinate adipate is contained in 0.5 to 10% by weight of propylene glycol, 0.5 to 15% by weight of diethylene glycol, and 0.1 to 2% by weight of tetrahydrophthalic anhydride. Method for producing a biodegradable agricultural film, characterized in that the production further comprising one or two or more. delete 1 to 50% by weight of polybutylene succinate-based biodegradable polymer resin, 20 to 90% by weight of polylactic acid, one or two selected from castor oil, twin-based organic or span-based organic 0.5 to 20% by weight of at least one compatibilizer, 0.5 to 30% by weight of one or more soil improvers selected from chitosan, lime, nanoclay, barium sulfate or palm oil, and 0.5 to 5 additives selected from carbon black or black dyes Raw material manufacturing step of producing a biodegradable raw material using a biodegradable resin composition comprising a weight%; Forming a sheet using the raw material; Molding the manufactured sheet into a flowerpot shape; Method for producing a biodegradable agricultural plant pot comprising a. 65 to 99% by weight of polybutylene succinate-based biodegradable polymer resin, 0.5 to 30% by weight of one or more soil improvers selected from chitosan, lime, nanoclay, barium sulfate or palm oil and carbon black Or a raw material manufacturing step of preparing a biodegradable raw material using a biodegradable resin composition comprising 0.5 to 5 wt% of an additive selected from black dyes; Forming a sheet using the raw material; Molding the manufactured sheet into a flowerpot shape; Method for producing a biodegradable agricultural plant pot comprising a. The method according to claim 13 or 14, The polybutylene succinate-based biodegradable polymer resin is 1 to 4 butanediol 35 to 55% by weight, succinic acid 40 to 64% by weight, and aluminum acetate basic, tetrabutyl titanate, antimony acetate or Polybutyl prepared by synthesizing 0.1-10 wt% of a catalyst selected from dibutyl tin oxide and one or two or more additives selected from phosphate, phosphite, phosphine, phosphinic acid, barium sulfate, zirconia, alumina, silica or titania Method for producing a biodegradable agricultural pots, characterized in that the styrene succinate (PBS). The method according to claim 13 or 14, The polybutylene succinate-based biodegradable polymer resin is 1,4 butanediol 35 to 55% by weight, succinic acid 40 to 60% by weight, adipic acid 1 to 20% by weight, And one or two or more catalysts selected from aluminum acetate basic, tetrabutyl titanate, antimony acetate or dibutyl tin oxide and selected from phosphate, phosphite, phosphine, phosphinic acid, barium sulfate, zirconia, alumina, silica or titania. Method for producing a biodegradable agricultural plant pots, characterized in that the polybutylene succinate- adipate (polybutylene succinate-co-adipate, PBSA) prepared by synthesizing the additive 0.1 to 10% by weight. 18. The method of claim 16, The polybutylene succinate adipate is contained in 0.5 to 10% by weight of propylene glycol, 0.5 to 15% by weight of diethylene glycol, and 0.1 to 2% by weight of tetrahydrophthalic anhydride. Method for producing a biodegradable agricultural pots, characterized in that the production further comprising one or two or more. delete 1 to 50% by weight of polybutylene succinate-based biodegradable polymer resin, 20 to 90% by weight of polylactic acid, one or two selected from castor oil, twin-based organic or span-based organic 0.5 to 20% by weight of at least one compatibilizer 0.5 to 30% by weight of one or two or more soil improvers selected from chitosan, lime, nanoclay, barium sulfate or palm oil and 0.5 to 5% by weight of additives selected from carbon black or black dyes Biodegradable agricultural film, characterized in that manufactured using a composition comprising a raw material. 65 to 99% by weight of polybutylene succinate-based biodegradable polymer resin, 0.5 to 30% by weight of one or more soil improvers selected from chitosan, lime, nanoclay, barium sulfate or palm oil and carbon black Or biodegradable agricultural film, characterized in that manufactured using a composition comprising 0.5 to 5% by weight of the additive selected from the black dye as a raw material. delete 1 to 50% by weight of polybutylene succinate-based biodegradable polymer resin, 20 to 90% by weight of polylactic acid, one or two selected from castor oil, twin-based organic or span-based organic 0.5 to 20% by weight of at least one compatibilizer, 0.5 to 30% by weight of one or more soil improvers selected from chitosan, lime, nanoclay, barium sulfate or palm oil, and 0.5 to 5 additives selected from carbon black or black dyes Biodegradable agricultural pots, characterized in that manufactured using a composition comprising a weight percent as a raw material. 65 to 99% by weight of polybutylene succinate-based biodegradable polymer resin, 0.5 to 30% by weight of one or more soil improvers selected from chitosan, lime, nanoclay, barium sulfate or palm oil and carbon black Or biodegradable agricultural pots, characterized in that manufactured using a composition comprising 0.5 to 5% by weight of the additive selected from the black dye as a raw material. delete

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