KR102074237B1 - Bio plastic composition comprising wheat bran and Bio plastic film using therefrom - Google Patents

Abstract

The present invention relates to a bioplastic composition including food by-products such as wheat pelvis, a bioplastic pellet and a film using the same, and the physical properties of the composition is improved, thereby improving the physical properties of the produced bioplastic film, thereby reducing carbon The present invention relates to a bioplastic composition and a bioplastic film using the same, which can replace petroleum-derived plastic products.

Description

Bio plastic composition comprising wheat vein and bio plastic film using the same {Bio plastic composition comprising wheat bran and Bio plastic film using therefrom}

The present invention relates to a bioplastic composition including food by-products such as wheat and bioplastic pellets and films using the same, and the physical properties of the composition is improved, thereby improving the physical properties of the produced bioplastic film, thereby reducing carbon The present invention relates to a bioplastic composition and a bioplastic film using the same, which can replace petroleum-derived plastic products.

Plastics are high molecular weight materials. As molecular weight increases, it changes from gas to liquid and solid. In the solid material, the fluidity worsens as the molecular weight increases, but the mechanical properties, heat resistance, and the like are improved, and the solid material has properties that can be used as one of the materials necessary in daily life such as metal, wood, ceramics, and rubber. Plastic is molded by adding various modifiers, colorants, reinforcing materials, fillers and the like to the polymer material. The properties of plastics are determined by the chemical structure of synthetic resins such as PE, PP, and PVC, but even the same number can be modified by using them because the properties change depending on many factors. In the chemical structure, the main chain and side chain state, end group / terminal group, bridging, and stereoregularity by molecular weight, molecular weight distribution, and conditions for making polymers (polymerization conditions) The properties vary depending on the composition distribution of the copolymer. In general, various kinds of additives such as additives, reinforcing agents, modifiers, etc. are added to the polymer raw material to produce a composition suitable for the purpose of use, called compounding, and is distributed in pellet form.

In recent years, the amount of plastic waste has increased exponentially with the increase in the use of various plastics including films used as food packaging materials. Plastic waste is generally treated by landfill, incineration or recycling. However, incineration and landfill of the waste after using the petroleum-derived plastic products, toxic gas is generated to cause air pollution, causing a lack of landfill space and environmental pollution. Therefore, by using natural raw materials using plant-derived by-products or fermentation technology to solve such problems, eco-friendly plastic research and development that can reduce the carbon is being actively progressed. However, when the by-products other than petroleum-derived plants are utilized in the development of plastic compositions, the use of petroleum-based plastic materials is reduced, resulting in the reduction of carbon, but elongation, tensile strength, etc. There is a problem that the physical properties are lowered.

In this regard, the Republic of Korea Patent Publication No. 10-2014-0018004 discloses a composition for sheet using a biomass, the Republic of Korea Patent Publication No. 10-2014-0094865 discloses a composition for a biomass film and the Republic of Korea 10-2013-0051840 discloses an eco-friendly bio-based pellet using plant biomass, but has not disclosed a bioplastic composition using wheat vein.

Republic of Korea Patent Application Publication No. 10-2014-0018004 (Published 26 August 2015) Republic of Korea Patent Application Publication No. 10-2014-0094865 (Published July 31, 2015) Republic of Korea Patent Application Publication No. 10-2013-0051840 (Published May 21, 2013)

An object of the present invention is to provide a bioplastic composition comprising a polyolefin-based resin, wheat vein, wax, inorganic fillers and a wheat vein containing a surfactant in order to provide a bioplastic composition containing wheat vein.

It is also an object of the present invention to provide a bioplastic pellet and film comprising the bioplastic composition described above.

The present invention provides a bioplastic composition including polyolefin resin, wheat vein, wax, inorganic filler and wheat vein containing surfactant in order to solve the above problems.

The polyolefin resin may be at least one selected from polyethylene (PE), polypropylene (PP), polybutylene, and polymethylpentene.

The polyolefin-based resin in the composition may be included in the composition 40 to 70% by weight.

On the other hand, the size of the wheat vein may be 5 ~ 30㎛, the uniformity (PDI) of the size of the wheat vein is less than 2, the moisture content of the wheat vein may be 1 ~ 10%. And the wheat vein may be included in the composition 10 to 30% by weight.

On the other hand, the wax is any one or more selected from paraffin wax, liquid paraffin wax, beeswax, mold wax, candelilla wax, polyethylene wax, polypropylene wax, may be included in the composition 10 to 20% by weight.

And, the inorganic filler is at least one selected from the group consisting of calcium carbonate, silica, mica and talc, may be included in the composition 5 to 20% by weight.

In addition, the surfactant is a fatty acid such as stearic acid, myristic acid, palmitic acid, arachidic acid, oleic acid, linolenic acid and cured fatty acid, glycerin, butylene glycol, propylene glycol, dipropylene glycol, pentylene glycol, hexylene glycol And at least one selected from the group consisting of polyols such as polyethylene glycol and sorbitol, and may include 0.5 to 5% by weight of the composition.

On the other hand, the composition may further comprise 10 to 30 parts by weight of a polyolefin resin based on 100 parts by weight of the total composition.

The present invention also provides a bioplastic pellet comprising the composition described above.

In addition, the present invention provides a bioplastic film comprising the composition described above. The film may further include a polyolefin resin.

On the other hand, the present invention comprises the steps of 1) preparing a bioplastic composition comprising the wheat flour by heat-mixing polyolefin resin, wheat vegetation, wax, inorganic filler and surfactant, and 2) extrusion of the bioplastic composition including the wheat vein, It provides a method for producing a bio-plastic pellet comprising the wheat flour comprising the step of cutting to form a pellet.

In particular, the wheat bran may be subjected to classification and micronization after grinding before mixing.

The present invention also provides a method for producing a bioplastic film comprising a polyolefin resin in addition to the bioplastic pellets prepared by the above production method.

The bioplastic composition of the present invention has high physical properties and high dispersibility, so that conventional equipment may be used in manufacturing a film, and there is an effect that holes are not generated during manufacturing.

In addition, the bioplastic film of the present invention has the same physical properties as the existing plastic-based film can be used in conventional equipment, there is an effect of providing a bioplastic film capable of carbon reduction.

1 is a flow chart showing a process for producing a pellet comprising a bioplastic composition comprising the wheat flour of the present invention.
Figure 2 is a photograph showing that the hole (hole) occurred when manufacturing the film using a composition having a non-uniform size of the conventional wheat vein.
Figure 3 is a photograph showing the pellets and film of the bioplastic composition according to the content of wheat vein.
Figure 4 is a graph showing the average capacity according to the particle diameter when pulverized, finely divided after classification.

The present invention provides a bioplastic composition comprising wheat flakes containing polyolefin resin, wheat bran, wax, inorganic filler, and other additives.

The polyolefin resin of the present invention may be at least one selected from polyethylene (PE), polypropylene (PP), polybutylene and polymethylpentene, preferably at least one selected from polyethylene (PE) and polypropylene (PP) And most preferably polyethylene (PE).

The polyethylene may be at least one selected from linear low density polyethylene (LLDPE), low density polyethylene (LDPE) and high density polyethylene (HDPE). In addition, the polyethylene may be prepared under one or more catalysts selected from a metallocene catalyst and a Zieggler-Natta catalyst, but preferably, a metallocene catalyst is prepared using a metallocene catalyst. Can be. Unlike the Ziegler-Natta catalyst, the metallocene catalyst has a single active point, and precisely controls the polymer structure by the single active point catalyst technology, thereby freely implementing a specific synthesis process. In particular, M-PE refers to a PE synthesized using a metallocene catalyst, M-PE is excellent in processability and quality than other PE, there is less foaming or hole generation.

The polyolefin-based resin in the composition may be included in the composition 40 to 70% by weight. If less than 40% by weight of the composition is not easy to mix and pellet processing is not easy, there is a problem in the physical properties of the film is uneven. When it contains more than 70% by weight, the inherent color of wheat in the composition is not maintained, and the carbon reduction effect is insignificant. However, the composition of the present invention may include the polyolefin resin of the above range, the composition is maintained while the inherent color of the wheat does not generate bubbles of wheat during film production, it can provide the same appearance, quality as conventional plastic-based film. .

The wheat vein of the present invention may use the by-products left after the production of flour in biomass, specifically, the wheat vein may be a crushed, classified, and micronized process.

The size of the wheat veins may be 5 ~ 30㎛, preferably 10 ~ 25㎛. If it is smaller than the above-mentioned size range of the wheat flour, the powder is blown and the workability worsens, which affects the yield. If it is larger than the range, the melt index (MI) of the composition is increased, so that the hardness of the pellets prepared from the composition is not constant. Deviation in tensile strength, elongation, etc.). Along with this, the uniformity of the microscopic particles is defined as a polydipersity index (PDI). PDI is expressed as the standard deviation of the diameter / square of the mean of the diameters. In the present invention, the PDI value of the wheat vein may be 2 or less, and preferably 1.5 or less. If the uniformity of the wheat size is out of the above range, the compounding properties are uneven, and the dispersibility may be poor. In the PDI range, a powder smaller than 30 μm may be formed to about 80%.

In addition, the wheat vein may have a water content of 1 to 10%. If it is lower than the range of water content of the wheat flour, the wheat flour processing process is inefficient. If the wheat flour is larger than the range, the physical properties of the prepared composition are bad, and the degree of film processing is lowered.

The wheat vein may be included in the composition 10 to 30% by weight. If it is less than the above range may not maintain the unique color of the wheat flour in the composition, in the case of more than the range of fine size of the wheat flour is agglomerated during the composition manufacturing process, because it contains air bubbles (physical strength, sealing strength Strength, elongation, etc.) may drop, and there is a problem in that holes may be generated during manufacturing. However, the composition of the present invention is included in the above range of wheat vein, while maintaining the unique color of the wheat does not generate bubbles when manufacturing the film, it can provide the same appearance, quality as conventional plastic-based film.

The wax of the present invention serves to connect the wheat flour and the polyolefin resin, and may be any one or more selected from paraffin wax, liquid paraffin wax, beeswax, driven wax, candelilla wax, polyethylene wax, and polypropylene wax, but is not limited thereto. Although not preferred, it is preferable to use polyethylene wax, and more preferably, a mixture of one or two selected from low density polyethylene wax (LDPE WAX) and high density polyethylene wax (HDPE WAX). The wax may be included in the composition 10 to 20% by weight.

The inorganic filler of the present invention may be at least one selected from the group consisting of calcium carbonate, silica, mica, and talc, but is not limited thereto. Preferably, inexpensive calcium carbonate (CaCO ₃ ) is used. The inorganic filler may be included in the composition 5 to 20% by weight. If it is included in less than the above ranges may be lowered physical properties and production costs, and if it is included in more than the above ranges may result in poor physical properties of the composition and film.

The surfactant of the present invention coats the surface of the wheat and makes it well mixed with wax or polyolefin, and serves to prevent the wheat from burning, stearic acid, myristic acid, palmitic acid, arachidic acid, oleic acid, Fatty acid, such as linolenic acid and cured fatty acid, glycerin, butylene glycol, propylene glycol, dipropylene glycol, pentylene glycol, hexylene glycol, polyethylene glycol and any one selected from the polyol series such as sorbitol, but is not limited thereto. The surfactant may be included in the composition of 0.5 to 5% by weight. If the surfactant is less than 0.5% by weight, the effect of the surfactant is insignificant, and when it exceeds 5% by weight, the film properties such as tensile strength are deteriorated.

The composition of the present invention may further comprise 10 to 30 parts by weight of the polyolefin resin based on 100 parts by weight of the total composition after the composition is prepared. The polyolefin-based resin may be the same as or different from the polyolefin-based resin included in the composition, but preferably using a different one may improve physical properties. When the polyolefin resin of the above range is further included, physical properties of the film may be improved.

Melt index (MI) of the composition of the present invention may be 1.5 to 10. If the melt index (MI) is lower than or higher than the range of flowability of the composition may be too low or high may not be suitable for extrusion molding. In particular, when the melt index is more than 10, the composition is caked, and the film cannot be produced.

The present invention can provide a bioplastic pellet comprising the composition.

The pellet comprising the composition is 1) preparing a bioplastic composition by heat-mixing polyolefin resin, wheat vegetation, wax, inorganic filler and surfactant, and 2) extruded and cut the bioplastic composition including the pellets It may be prepared by a method for producing bioplastic pellets, including the small vegetation comprising the step of forming into. Specifically, the wheat bran may be prepared by grinding, classification and micronization before mixing. The pulverization process may be pulverized using a known pulverization apparatus, and the classification process refers to sorting the pulverized wheat flour by size, and the undifferentiated process refers to collecting small sized wheat blood passing through a sieve. Through the above process, it is possible to obtain a uniform micro-sized wheat vein.

Herein, the hardness of the pellet including the composition may be 94 to 98 or less. The measuring method of the said hardness was measured by JIS-A, and when a pellet is out of the said hardness, dispersibility falls and film workability is inferior.

The bioplastic composition of the present invention has high physical properties and high dispersibility, so that conventional equipment may be used in manufacturing a film, and there is an effect that holes are not generated during manufacturing.

The present invention can provide a bioplastic film comprising the composition.

The film may have physical properties that can replace conventional plastic products derived from petroleum. Specifically, the sealing strength of the film may be 0.3 ~ 1.4 kgf and the sting strength may be 0.08 ~ 0.24kgf. In addition, the film may have an elongation rate of 300-750% MD, a transverse direction 250-900%, and tensile strength of 0.4-1.5 kgf MD, 0.3-TD transverse direction. Can be 1.7kgf. The physical property range can be used for various packaging such as zone packaging, tone bag inner shell, valve bag inlay.

The bioplastic film of the present invention may be prepared by mixing, melting, and extruding or calendering a tee-die with the bioplastic composition, the polyolefin resin, and the additive including the above-mentioned wheat bran. In addition, a bioplastic film may be prepared by including a polyolefin-based resin in addition to the bioplastic pellet containing the wheat flour prepared from the bioplastic composition including the wheat flour. Specifically, the polyolefin-based resin may be the same or different from the polyolefin-based resin included in the composition, it is preferable to use a different one because it can improve the physical properties of the film.

The bioplastic film of the present invention has properties similar to those of a conventional plastic film and can be used in a conventional installation, while reducing carbon.

The present invention will be described in more detail with reference to the following examples. Since the embodiments disclose only one example of the present invention, the scope of the present invention is not limited to the scope of the embodiments.

<Example>

1. Comparison of Properties of Bio-Plastic Films with Cereals According to the Size of Cereals

Example 1 Preparation of a Composition and Film Comprising a Small Vein Powder with 15 μm, PDI = 1

1) Preparation of bioplastic composition including wheat vein

The wheat flour was automatically dried by controlling the motor of the blade at 100 to 200 RPM in an ACM grinder to grind the moisture content to 7% or less, and classify the pulverized fine particles to produce a powder having 15 μm and PDI = 1 (FIG. 4). The powder in the above range is formed in about 90% of the powder smaller than 30㎛. 15 μm, 25% by weight of wheat flour powder with PDI = 1, 50% by weight of polyethylene (LLDPE) in pellet or powder form, 10% by weight of calcium carbonate and 14% by weight of wax and 1% by weight of surfactant The temperature is controlled to prevent burnt at ˜200 ° C., and the mixture is heated and mixed to prepare a bioplastic composition including the pelvis, followed by extrusion and cutting into pellets.

2) Preparation of bioplastic film containing wheat vein

20 wt% of the prepared pellets and 80 wt% of petroleum PE blending (70 wt% of LLDPE, 10 wt% of LDPE) were mixed to prepare a film of Preparation Example 1 having a thickness of 50 μm.

Comparative Example 1 Preparation of a Composition and Film Comprising Bovine Skin Powder of 70 μm, PDI = 3

In addition to producing and using a wheat flour powder having a 70 μm, PDI = 3, the same manufacturing method as in Example 1 Comparative Example 1 A bioplastic composition and a film were prepared.

Experimental Example 1: Comparison of physical properties of bioplastic film including wheat vein according to the size of wheat vein

In order to confirm the physical properties of the bioplastic films of Example 1 and Comparative Example 1, tensile strength, elongation rate, sealing strength, and puncture strength were measured, and the results are shown in Table 1.

Comparison of Properties of Bio-Plastic Films with Cereals with Different Cereals Item Example 1 Comparative Example 1 Wheat vein particles (㎛, PDI)  15,1  70,3 Thickness (㎛) 50 50 Tensile Strength (kgf, 15mm) TD 1.01 0.34 MD 1.36 1.00 Elongation (%) TD 591 85 MD 522 348 Sealing strength (kgf) 0.77 0.66 Puncture strength (kgf) 0.14 0.12

As shown in Table 1, the bioplastic film of Example 1 was confirmed that the tensile strength, elongation rate, sealing strength and puncture strength is higher than the bioplastic film of Comparative Example 1. That is, it can be confirmed that the physical properties of the bioplastic film including the wheat flour is improved when the wheat flour particles are 15 μm and PDI = 1.

2. Comparison of Physical Properties of Bioplastic Compositions and Films including Cereals According to Cereals Content

Examples 2 to 4: Preparation of a bioplastic composition including the wheat vein with different wheat vegetation contents

15 μm, PDI = 1 sized wheat flour powder prepared in the same manner as in Example 1 was mixed with polyethylene (LLDPE) in the form of pellets or powder, an inorganic filler, 14% by weight of calcium carbonate and wax, and 1% by weight of other additives. To prepare a bioplastic composition including the wheat vein was processed into pellets. The content ratio of the small wheat polyethylene and the inorganic filler in the pellet is shown in Table 2 below.

Comparative Example 2: Preparation of Film Not Containing Wheat Veins

The composition of Comparative Example 2 was prepared in the same manner as in Examples 2 to 4, except that only polyethylene was used without the wheat vein and the inorganic filler, and then processed into pellets.

Composition of Bio-Plastic Composition Containing Wheat Flour According to the Content of Wheat Flour division Example 2 Example 3 Example 4 Cereals content 5% 15% 25% Polyethylene content 70% 60% 50% Mineral filler 15% 10% 10%

Experimental Example 2: Comparison of physical properties of bioplastic composition including wheat vein according to the content of wheat vein

Melt index (MI 190, 2.16 kg), hardness (JIS-A) and specific gravity of the bioplastic composition of Examples 2 to 4 or only the composition of Comparative Example 2, which does not include pellets and wheat veins, differing only in the content of wheat vein Was measured and the results are shown in Table 3.

Properties of Bioplastic Compositions Containing Cereals According to Cereals Content division Comparative Example 2 Example 2 Example 3 Example 4 MI (190 ℃, 2.16kg) 1.00 1.43 1.85 2.26 Hardness (JIS-A) 96.5 97.5 97.5 95-96 importance 1.213 1.044 1.035 1.046

Black spots did not occur and the brown color remained in the compositions of Examples 2-4. In addition, as shown in Table 3, the melt index of the compositions of Examples 2 to 4 tended to increase as the content of the wheat flour increased, but even when compared with Comparative Example 2, all showed appropriate values for film production, and prepared with the composition. The hardness of one pellet also did not show a significant difference from Comparative Example 2. The specific gravity was confirmed to be smaller than that of Comparative Example 2 due to the inclusion of the wheat vegetation, but showed an appropriate value for the production of bioplastics including the wheat vein.

Examples 5 to 7: Preparation of a bioplastic film including the wheat vein according to the wheat vegetation content

20 to 50 wt% of each of the compositions including the wheat flour of Examples 2 to 4 and 80 wt% of petroleum PE blending (70 wt% of LLDPE, 10 wt% of LDPE), and then 50 μm to Preparation. 7 films were prepared.

Experimental Example 3: Comparison of physical properties of bioplastic film including wheat vein according to the content of wheat vein

Tensile strength, elongation rate, sealing strength and puncture strength of the bioplastic films of Examples 5 to 7 were measured, and the results are shown in Table 4.

Comparison of Properties of Bio-Plastic Films with Wheat Flour According to the Wheat Flour Content Item Example 5 Example 6 Example 7 Cereal content in pellets 5% 15% 25% Thickness (㎛) 50 50 50 Tensile strength (kgf, 15mm)
TD 1.60 1.08 0.65 MD 1.42 0.83 0.41 Elongation (%)
TD 552.97 452.72 318.48 MD 661.72 613.47 350.71 Sealing strength (kgf) 0.88 0.59 0.40 Puncture strength (kgf) 0.18 0.15 0.09

Bubbles of wheat did not occur when the films of Examples 5 to 7 were produced, and evenly distributed physical properties of the composition were within ± 2% of the thickness variation of the film. As shown in Table 4, the bioplastic films of Examples 5 to 7 were found to have an appropriate level of tensile strength, elongation rate, sealing strength and puncture strength for packaging.

3. Comparison of Properties of Bioplastic Compositions and Films Containing Wheat Flour According to Polyolefin Resin

Examples 8 to 12 Preparation of Bioplastic Compositions Containing Wheatskin According to Polyolefin Resin

To the wheat flour powder prepared in the same manner as in Example 1, pellets or powdered polyethylene, a catalyst, and an inorganic filler were mixed with calcium carbonate, wax, and other additives by weight of 1% by weight to prepare a composition including wheat veins. The content ratio of wheat vein, polyethylene, inorganic filler, wax and other additives is shown in Table 5 below.

Composition of bioplastic composition including wheat veins according to polyolefin resin division Example 8 Example 9 Example 10 Example 11 Example 12 Cereals content 5% 15% 25% 50% 30% Polyolefin resin 70% 60% 50% 35% 60% catalyst Metallocene Metallocene Metallocene Metallocene Ziggler-atta Calcium Carbonate Content 15% 10% 10% 10% 10% Wax 14% 14% 14% 14% 14% Other additives One% One% One% One% One%

Comparative Examples 3 and 4: Preparation of Bioplastic Compositions That Do Not Contain Wheatgrass

Comparative Examples 3 (100% of polyolefin resin, metallocene catalyst) and 4 (polyolefin) using only polyethylene and a catalyst (metallocene catalyst and Ziegler-Natta catalyst) without containing wheat vein in the same production method as Examples 8 to 12 Resin 100%, Ziegler-Natta catalyst) was prepared.

Experimental Example 3: Comparison of physical properties of bioplastic composition including wheat vein according to polyolefin resin

Melt index (compared to the compositions of Comparative Examples 3 and 4, which did not include the small vegetation, in order to confirm that the composition of Examples 8 to 12 having different vein content and polyolefin resin and catalyst were suitable for preparing a bioplastic film. MI 190, 2.16 kg) and specific gravity were measured and the results are shown in Table 6.

Physical Properties of Bioplastic Compositions Containing Cereals with Polyolefin Resin division Comparative Example 3 Example 8 Example 9 Example 10 Example 11 Comparative Example 4 Example 12 MI (190, 2.16 kg) 1.0 1.43 1.85 2.26 2.3 1.9 4.12 importance 0.921 1.044 1.035 1.046 1.05 0.922 1.088

As shown in Table 6, the melt index (MI) tended to increase as the content of wheat flour increased, and the melt index (MI) was more uniform when using the Ziegler-Natta catalyst when the metallocene catalyst was used. . However, all of the compositions of Examples 8 to 12 exhibited appropriate values for film production. The specific gravity of the compositions of Examples 8 to 12 was confirmed to be greater than that of Comparative Examples 3 and 4 because it includes wheat vegetation, but exhibited an appropriate value for the preparation of bioplastics including wheat vegetation.

Examples 13 and 14: Preparation of Bioplastic Films Containing Wheatskin According to Polyolefin Resin

Example 12 Using a metallocene catalyst instead of the composition and the Ziegler-Natta catalyst of Example 12 to prepare a composition containing the wheat vegetation in the same manner as in Example 12 and to prepare a pellet with the composition prepared pellet 20 A bioplastic film of Examples 13 (Hanhwa 3305) and 14 (LGSE1020A) having a thickness of 50 μm was prepared after mixing 80% by weight of petroleum based PE blending (70% by weight of LLDPE + 10% by weight of LDPE). It was.

Comparative Example 5 Preparation of a Film Without a Bioplastic Composition Including Wheat Vein

The film of Comparative Example 5 was prepared by mixing 100% by weight of petroleum-based PE (blanding) (80% by weight of LLDPE, 20% by weight of LDPE) in the same manner as in Examples 13 and 14 without the bioplastic composition including wheat veins. .

Experimental Example 4: Comparison of physical properties of bioplastic film including wheat vein according to polyolefin resin

In order to confirm the physical properties of the bioplastic films of Examples 13 and 14, the sealing strength was measured, and the results are shown in Table 7.

Comparison of Properties of Bio-Plastic Films Containing Wheat Flour According to Polyolefin Resin division Sealing strength (kgf) Comparative Example 5 1.1368 Example 13 1.0082 Example 14 1.0315

As shown in Table 7, the bioplastic films of Examples 13 and 14 had a slightly lower sealing strength, puncture strength, and elongation rate than Comparative Example 5, but exhibited appropriate values during film processing, and had similar properties to those of conventional plastic films, The effect of providing a bioplastic film that can be reduced can be confirmed.

4. Variation of Physical Properties by Mixing Bioplastic Compositions and Other Materials

Examples 15-17 Preparation of Bioplastic Films Containing Cereals Blended with Other Materials

A bioplastic composition was prepared by further mixing 20 parts by weight of LLDPE with 100 parts by weight of the composition including the wheat vein of Example 4, and pellets were prepared from the composition. The bioplastic film of Example 15 having a thickness of 50 μm was prepared after mixing 20% by weight of the pellet and 80% by weight of petroleum PE blending (70% by weight of LLDPE, 10% by weight of LDPE). Example 16 and 17 bioplastic films were prepared in the same manufacturing method using a composition using 20 parts by weight of LDPE, 20 parts by weight of M-PE instead of LLDPE.

Experimental Example 5: Comparison of physical properties of bioplastic film containing wheat veins mixed with other materials

In order to confirm the physical properties of the bioplastic films of Examples 15 to 17, the sealing strength, the puncture strength, the elongation was measured, and the results are shown in Table 8.

Comparison of Properties of Bioplastic Films with Wheat Flour Blended with Other Materials Item Example 15 Example 16 Example 17 Furtherance 100% by weight 25% wheat flour + 20 parts by weight of LLDPE 100% by weight 25% wheat veins + 20 parts by weight of LDPE 100% by weight 25% wheat flour + 20 parts by weight of M-PE Thickness (㎛) 50 50 50 Tensile Strength (kgf, 15mm) TD 0.89 0.88 0.80 MD 0.64 0.53 0.53 Elongation (%) TD 431.29 266.22 341.79 MD 416.04 532.47 324.47 Sealing strength (kgf) 0.57 0.64 0.58 Puncture strength (kgf) 0.14 0.11 0.12

As shown in Table 8, the bioplastic films of Examples 15 to 17 were found to have increased tensile strength, sealing strength, puncture strength, and elongation rate compared to Example 7, and the physical properties of the bioplastic films according to the composition ratio when mixed with other materials in the composition were used. It was confirmed that it can be changed.

Claims (16)

A bioplastic composition comprising a polyolefin-based resin, wheat vein, wax, inorganic filler and wheat vein containing a surfactant,
The size of the wheat vein is 10-25 ㎛, uniformity (PDI) of the size of the wheat vein is 2 or less,
The wax is included in the composition 14 to 20% by weight,
Bioplastic composition having a melt index (MI) of 1.43 to 10. The method of claim 1,
The polyolefin resin is a bioplastic composition, characterized in that it further comprises one or more selected from polyethylene (PE), polypropylene (PP), polybutylene and polymethylpentene. The method of claim 1,
The polyolefin resin is bio-plastic composition, characterized in that 40 to 70% by weight contained in the composition. The method of claim 1,
The polyolefin-based resin is a bioplastic composition, characterized in that it comprises a polyethylene prepared under a metallocene catalyst. The method of claim 1,
The wheat vein is a bioplastic composition, characterized in that it has a water content of 1 to 10% by weight or less. The method of claim 1,
The wheat vein is bio-plastic composition, characterized in that contained 10 to 30% by weight. The method of claim 1,
The wax comprises any one or more selected from paraffin wax, liquid paraffin wax, beeswax, mold wax, candelilla wax, polyethylene wax, and polypropylene wax. The method of claim 1,
The inorganic filler is at least one selected from the group consisting of calcium carbonate, silica, mica and talc,
The inorganic filler is bio plastic composition, characterized in that 5 to 20% by weight contained in the composition. The method of claim 1,
The surfactant is a fatty acid, glycerin, butylene glycol, propylene glycol, dipropylene glycol, pentylene glycol, including at least one selected from stearic acid, myristic acid, palmitic acid, arachidic acid, oleic acid, linolenic acid, and cured fatty acid. , Hexylene glycol, polyethylene glycol and sorbitol, characterized in that any one or more selected from the group consisting of polyol containing at least one selected from,
The surfactant is a bioplastic composition, characterized in that it comprises 0.5 to 5% by weight. The method of claim 1,
The composition is a bioplastic composition, characterized in that it further comprises 10 to 30 parts by weight of the polyolefin-based resin after the composition preparation based on 100 parts by weight of the total composition. A bioplastic pellet comprising the composition of claim 1. Bio plastic film comprising the composition of claim 1. The method of claim 12,
The film is a bioplastic film, characterized in that it further comprises a polyolefin resin. In the method for producing a pellet comprising a bioplastic composition comprising wheat vein,
1) heat-mixing a polyolefin-based resin, wheat vein, wax, inorganic filler and surfactant to prepare a bioplastic composition including wheat vein; And
2) molding into pellets;
As a method for producing a bioplastic pellet comprising a,
The size of the wheat vein is 10-25 ㎛, uniformity (PDI) of the size of the wheat vein is 2 or less,
The wax is included in the composition 14 to 20% by weight,
Melt index (MI) of the bioplastic composition is 1.43 to 10 method for producing bioplastic pellets. The method of claim 14,
The method of producing a bioplastic pellet, characterized in that the wheat vein is subjected to a classification and micronization process before and after grinding and pulverization. The method of claim 14,
Bioplastic film manufacturing method characterized in that it further comprises a polyolefin resin in addition to the bioplastic pellets produced by the manufacturing method.

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