PH12018000082A1

PH12018000082A1 - Oxo-biodegradable transparent bio wrap film composite

Info

Publication number: PH12018000082A1
Application number: PH12018000082A
Authority: PH
Inventors: Tae Kim Young; Sun You Young
Original assignee: Bio Polymer Co Ltd; Powerwrap Corp
Priority date: 2017-05-29
Filing date: 2018-03-21
Publication date: 2019-08-19
Also published as: KR101803495B1; CN109563307A; MY187976A; CN109563307B; WO2018221861A1; PH12018000082B1

Abstract

The present invention relates to a bio-wrap film, and more particularly, Oxo-biodegradable transparent bio wrap film composition using biomass and biodegradation catalyst, a transparent bio wrap film manufactured through extrusion of the composition, and a manufacturing method thereof, where carbon neutral-type plant plasticizer, epoxided soybean oil and components for maintaining freshness are added to vinyl chloride resin as a main raw material, and then raw composition for food packing materials is prepared and extruded in type of a film, and thus carbon reduction, biodegradable property and freshness maintenance are accomplished as well as excellent transparency, flexibility and mechanical properties are harmoniously implemented.

Description

regulated substances according to Europe RoHS guideline. [DETAILED DESCRIPTION OF THE INVENTION]

Oxo-biodegradable transparent bio wrap film composition according to the present invention, comprising: 100 parts by weight of a thermoplastic resin as a main raw material; 27 to 51 parts by weight of an ester plasticizer as a first plasticizer; 6 to 12 parts by weight of a carbon neutral-type plant plasticizer as a second plasticizer; 1 to 2 parts by weight of a polyhydric alcohol fatty acid ester as an anti-fogging agent; 0.1 to 2 parts by weight of calcium-zinc-based organic composite heat stabilizer as a heat stabilizer; 0.1 to 2 part by weight of an oxo biodegradable pellet containing biomass as an oxo-biodegradable catalyst; and 0.001 to 0.02 parts by weight of a metal-coated zeolite powder as an additive for maintaining freshness; the thermoplastic resin is polyvinyl chloride (PVC); the first plasticizer is a mixture of Glyceryl laurate diacetate and Diisononyl hexahydrophthalate; the second plasticizer is an epoxided soybean oil; the anti-fogging agent is a polyglycerol monooleate; the heat stabilizer is a mixture of salt of fatty acid of calcium-zinc having at least one fatty acid selected from a group of lauric acid, oleic acid, benzoic acid, behenic acid, li stearic acid and ricinoleic acid; the oxo-biodegradable catalyst consists of biomass, binder resin, wax, aliphatic polyesters, sorbitol, calcium carbonate and stearic acid; the additive is zeolite powder where titanium is coated on surface of the zeolite; the oxo-biodegradable transparent bio wrap film composition is used as raw material for food packing;

Poly vinyl chloride (PVC), a main raw material of bio wrap film composition according to the present invention can play a role to determine properties of various extruded products manufactured from oxo-biodegradable bio wrap film composition.

Basically, degree of polymerization (DP) should be determined first, which is a major factor influencing resin properties according to characteristics of a product produced in the future. Also, the lower DP is, the better processability is but the worse a property such as mechanical strength is. Further, the higher DP is, the better a property is but the worse processability is. Therefore, it is advantageous that PVC has 950 to 1050 of heavy DP in order to produce soft and hard products such as films, packing materials and wires requiring flexibility. Additionally, PVC with heavy DP is advantageous in improving properties such as transparency, tensile strength and anti-fogging of a product. Moreover, rapid melting rate and plasticizer absorption rate of PVC with heavy DP accelerate gelation and reduce time for mixing raw materials as well as improve processability due to excellent operational stability.

Meanwhile, it is preferable that a resin is porous in order to absorb additives such as plasticizer and heat stabilizer added necessarily for property improvement and functionality. It 1s preferable that a resin has .a narrow scope of particle size distribution and proper apparent specific gravity for improving extrusion amounts per time unit and mix of raw materials. If the scope of particle size distribution is broader, processability would be worse because the mixing status of raw materials is worse. On the other hand, if the scope of particle size distribution 1s narrower, it would be difficult to earn a normal property because it would interrupt resin melting caused by pyrolysis and friction between particles. Therefore, it is advantageous that PVC has proper particle size, particle size distribution and apparent specific gravity, preferably, PVC can have 300 to 350um of particle size distribution and 0.51 to 0.59 g/cc of specific gravity, but not limited thereto.

Plasticizer is used for accelerating plasticization of raw resins, and adding ductility and adhesion to a film manufactured from composition in bio wrap film composition according to the present invention.

A first plasticizer is an ester plasticizer, particularly a mixture of Glyceryl laurate diacetate and Diisononyl hexahydrophthalate (with ratio 3:7 or 7:3 in weight, more specifically 5:5 in weight). Additionally, 27 to 51 parts of the ester plasticizer by 100 weight of PVC can be added.

A second plasticizer is a plasticizer originated from plant, particularly an epoxided soybean oil. The epoxided soybean oil is included as carbon neutral biomass into bio wrap film composition of the present invention, and thus improves carbon reduction. Moreover, the epoxided soybean oil costs less compared to general plasticizers and thus makes save the overall costs. Further, the epoxided soybean oil plays a role as a heat stabilizer partly and thus can maximize the effect of heat stabilization with after-mentioned heat stabilizer.

However, if excess amounts of the epoxided soybean oil is used,

it would be bleed-out from a product and thus efflorescence on film surface can arise when it is preserved under high temperature with humidity or low temperature. Therefore, the epoxided soybean oil is used with suitable amounts, preferably, 6 to 12 parts of the epoxided soybean oil by 100 weight of PVC can be added.

An anti-fogging agent 1s for prohibiting droplets formed by condensation of vapor on film surface, specifically, polyhydric alcohol fatty acid ester such as monoglycerin fatty acid ester, polyglycerin fatty acid ester, sorbitan fatty acid ester and polyoxyehylene fatty acid ester, particularly polyglycerol monooleate. The anti-fogging agent can cause low transparency when adding excess amounts of it, and thus, preferably, 1 to 2 parts of the anti-fogging agent by 100 weight of PVC can be added.

A heat stabilizer is for prohibiting pyrolysis of PVC under high temperature and suppressing production of hydrogen chloride caused by heating. A non-lead heat stabilizer, particularly calcium-zinc-based organic composite heat stabilizer is used. The calcium-zinc-based organic composite heat stabilizer can be a mixture of salt of fatty acid of calcium-zinc having at least one fatty acid selected from a group of lauric acid, oleic acid, benzoic acid, behenic acid, stearic acid and ricinoleic acid, preferably, 0.1 to 2 parts of the calcium-zinc-based organic composite heat stabilizer by 100 weight of PVC can be added.

An oxo-biodegradable catalyst is for shortening period of complete decomposition of plastics or regulating period of final biodegradation. The oxo-biodegradable catalyst in the present invention can consist of biomass, binder resin, wax,

aliphatic polyesters, sorbitcel, calcium carbonate and stearic acid. The biomass can be byproducts from grain husk or lignocellulosic agricultural products or a mixture thereof, and variants of the byproducts or the mixture can be used. The binder resin can be polypropylene or polyethylene, preferably polyethylene. The wax can be paraffin, cera, candelilla, PE and

PP wax. The aliphatic polyesters can be preferably succinic acid. Additionally, the sorbitol can function as starch plasticizer, and the calcium carbonate can be function as inorganic filler. A mixture of the seven substances in aggregate is used as an oxidative catalyst in the present invention and thus biodegradation period of products including the composition and a film according to the present invention can be regulated. Meanwhile, the seven substances can be included with over 25% of biomass, less 50% of binder resin, less 10% of wax, less 10% of aliphatic polyesters, less 3% of sorbitol, less 10% of calcium carbonate and less 2% of stearic acid, for example, 50% of biomass, 35% of binder resin, 5% of wax, 4% of aliphatic polyesters, 1% of sorbitol, 4% of calcium carbonate and 1% of stearic acid.

An additive for maintaining freshness for prohibiting discoloration, decline and rancid of a product targeted to be packed, and maintaining the freshness. A metal-coated zeolite powder, preferably, titanium, aluminum or tin-coated zeolite powder can be used as an additive in the present invention.

Metals coated on zeolite surface bind to oxygen in packing materials of a food product and thereby are altered to titanium oxide. As a result, oxygens in packing materials of a food product is removed and thus anti-oxidant function can be significantly strengthened. Metals such as titanium can be coated on zeolite surface by a method where water soluble metal-containing compound is dissolved in water and then impregnated into zeolite. Meanwhile, for the purpose of satisfying freshness and econcmic feasibility, it 1s preferable that 0.001 to 0.02 parts of the additive for maintaining freshness by 100 weight of PVC is added.

Oxo-biodegradable transparent bio wrap film composition according to the present invention can be produced in type of a thin film through extrusion and cooling processes. In the step of the composition, it 1s necessary that predetermined mechanical property should be implemented in the film and thus the thickness of the film should be decided. The thickness of the oxo-biodegradable transparent bio wrap film composition according to the present invention can be preferably 10 to 15um, and more preferably 11 to 13m. An excellent property suitable for the film can be earned in the scope of 11 to 13um of thickness.

Hereinafter, the present invention will be described in details based on examples. However, the examples are only for helping understand the present invention and the present invention is not limited thereto.

EXAMPLE 1. (1) SYNTHESIS OF OXO-BIODEFRADABLE TRANSPARENT WRAP FILM

COMPOSITION

Polyvinyl chloride (p-1000, Hanwha Chemical), a first plasticizer {A-5004, Misung), epoxided soybean oil as a second plasticizer (E.S.0O. SAJO), polyhydric alcohol fatty acid ester as an anti-fogging agent (ALMAX-9000, ILSHINWELLS), calcium- zinc-based organic composite heat stabilizer (LTX, KD CHEM), oxo-biodegradable catalyst (TGR, Bio Polymer) and titanium- coated zeolite powder as an additive for maintaining freshness were mixed according to ratio .in table below (unit: kg) and then put into supermixer. While maintaining at 140 £ 5 CT, it was mixed in 1400rpm for 12 minutes and thus transparent composition was prepared. Additionally, control was prepared under identical conditions except oxo-biodegradable catalyst.

TABLE. 1 -bi bl composition

Polyvinyl chloride 100 (P-1000) 100 aliphatic dibasic acid ester plasticizer 39 39 (A-5004) epoxided soybean oil (ESO) polyhydric alcohol fatty acid ester 1.5 1.5 (ALMAX-9000) calcium-zinc-based organic composite heat

Lo 1 1 stabilizer (LTX) oxo-biodegradable catalyst 0 1 (TGR) additive for maintaining freshness . 0.01 (titanium-coated zeolite 0.01 powder) (2) SYNTHESIS OF OXO-BIODEGRABLE TRANSPARENT BIO WRAP FILM (FOR

PACKING)

The control and the oxo-biodegradable transparent bio wrap film synthesized above were extruded under 180 to 200 CT of screw temperature and 200 to 205 C of T-DIE(T-DIE, Cn tech industrial company, Hwaseong, Korea) using an extruder with 90 mm of diameter and 28 of L / D(#90-28, Power INC., Cheongju, Korea).

a film with 12 um of thickness was synthesized through a winder roll after making passing a cooling roll No.l, No.2 and No.3 at 20 to 26 TC

Properties of the above examples and control were measured and analyzed the results.

EXPERIMENTS

(1) BIOMASS-ORIGINATED ORGANIC CARBON CONTENT 25g of the oxo-biodegradable transparent bio wrap film from the examples was requested to BETA laboratory in USA for measurement under ASTM D6866 standard (European official title,

CEN16137) for measuring Dbiomass-originated organic carbon content in a product.

The results showed that organic carbon content in the film was 35% and was higher than 25% of accreditation criteria of United

States Department of Agriculture. (2) TENSILE STRENGTH, ELONGATION AND MAXIMUM LOAD ELONGATION

The control and the oxo-biodegradable transparent bio wrap film from the examples were cut 5 X 150 mm under ASTM D3039 standard and the properties of the control and the oxo-biodegradable transparent bio wrap film from the examples(tensile strength, elongation and maximum load elongation) were measured using an universal material testing machine (WL2100C UTM, Withlab

Corporation, Gumpo, Korea). The results were shown in Table. 2.

Moreover, the graph of tensile strength, elongation and maximum load elongation of The control and the oxo-biodegradable transparent bio wrap film from the examples were depicted in

FIG. 2, FIG.3 and FIG. 4.

TARLE. 2

Tensile £ / mm)

Ff] wen [rem | we | men elongation (% 214.188 406.356 259.736 395.232 )

Both of the control and the oxo-biodegradable transparent bio wrap film from the examples showed high tensile strength and elongation in MD. Tensile strength and elongation of the oxo- biodegradable transparent bio wrap film were lower than the control in TD but the significant difference was over 90%, and thus the strength was not weakened. On the other hand, tensile strength and elongation of the oxo-biodegradable transparent bio wrap film were lower than the control in MD. The strength of the oxo-biodegradable transparent bio wrap film was increased and thus the strength was better than the control.

Maximum load elongation of the oxo-biodegradable transparent bio wrap film was higher than the control in MD, but lower in

TD. However, the significant difference was over 90% and thus the oxo-biodegradable transparent bio wrap film was similar to the control in maximum load elongation. (3) BIODEGRADATION TEST

Measurement was performed under ASTMDE954-04 for testing biodegradation of cellulose as a standard substance and the oxo-biodegradable film. The test consisted of 3 steps in FIG. 5.

In the first step, the samples were chemically decomposed in

UVA 340 mm for 100 hours by ASTM D5208-01 CYCLE, and then the

UVA-processed samples were measured by KSM-3100-1. The result of biodegradation test for 45 days by ASTM D6954-04 was shown in Table. 3, and average biodegradation of the standard substance and the biodegradable film were shown in FIG. 6 and

FIG. 7.

TABLE. 3

Average blodegradation calcaulated Biodegradable by CO, emissions

Type Biod S501 film/standard

Standard substance +o egra able substance film

The result showed that average biodegradation of cellulose as standard substance calculated by CO, emissions was 76.1%, and average biodegradation of the oxo-biodegradable film, synthesized by the method according to the present invention, calculated by CO; emissions was 46.7%. Particularly, biodegradation of the oxo-biodegradable film, synthesized by the method according to the present invention, was consistently degraded after Day 16. Additionally, 61.4% of biodegradation compared to the standard substance was shown. (4) FILM STABILITY AS PACKING MATERIAL

The oxo-biodegradable film, synthesized by the method according 200 to the present invention, was measured by synthetic resin method of Korean Food Standards Codex under KFDA standard, and the results were shown in Table. 4.

TABLE. 4

Standard pd | Below 10

Quality test Cd Below 10 Below 100 (mg/kg) Hg Below 10 (total)

Below 10 ed Belowi . Potassium

Elution test (mg/1) permanganate Below 10 consumption

Total elution Below 10

The result was shown that Pb, Cd, Hg, Cr® was below 10 mg/kg of measurement limit and the total value, which was below 100, passed the standard in quality test. Pd, potassium permanganate consumption and total elution were below the standard.

Therefore, the oxo-biodegradable film according to the present invention was suitable for the standard for packing material of food product. (5) TOXIC SUBSTANCE TEST

Test of six regulated substances according to Europe RoHS guideline in the oxo-biodegradable film, synthesized by the method according to the present invention, was performed under

IEC 62321. The result was shown in Table. 5, and the flow chart of the method of the regulated substances was depicted in FIG. 8 and FIG. 9.

TABLE. 5

Pb [Not detected | 5 mg/kg *1

Not detected | 0.5 mg/kg 0.5 mg/kg

Cr’ _ Not detected 0.5 mg/kg _*3

Total-PBBS Not detected -

Mono-bromobiphenyl . (Mono-BB) Not detected 10 mg/kg

Di- bromobiphenyl % (Di-BB) Not detected 10 mg/kg 4

Tri- bromobiphenyl (Tri- BB) Not detected 10 mg/kg

Tetra- bromobiphenyl | Not detected 10 mg/kg

(Tetra-B®) | [0

Total-PDBEs | Not detected | ~~ - (*1: TEC 62321-5 Ed.1.0: 2013(AAS), *2: IEC 62321-4 Ed.1.0: 2013 (AAS), *3: IEC 62321 Ed.1.0: 2008 (UV/Vis), *4: IEC 62321

Ed.1.0: 2008 (GC/MS))

The results were shown that six regulated substances in the oxo-biodegradable film, synthesized by the method according to the present invention were not detected, and it was suitable for Europe RoHS standard. (6) TRANSPARENCY

Haze was measured for transparency test under ASTM D1003 standard test. Haze is a . situation that opaque blurred appearance comes out because light 1s diffused according to inherent characteristics of a substance except reflection or absorption when the light passes through transparent substance.

In other words, the extent of diffusion of the light in a transparent substance is called haze, and diffuse transmittance (Td) and total transmittance (Tt) are measured as well as the ratio(Td/Tt X 100) is described. Therefore, when haze value 1s below 1, the substance is excellent optically.

When haze value is below 3, the substance can be used as optical substance.

The result was shown that haze value of the oxo-biodegradable film was 3, which means that transparency was excellent.

REVIEW THE RESULTS

An oxo-biodegradable transparent bio wrap film was developed using plant-originated plasticizer and biodegradable catalyst in the present invention.

The results of tensile strength, elongation and maximum load elongation based on existence of oxo-biodegradable catalyst were similar each other.

Carbon neutral-type plant biomass is spotlighted in terms of non-contribution of total carbon increase on Earth, and biomass content was 35%, which was higher than 25% of USDA standard in carbon neutral-type transparent bio wrap film. Further, the test results of heavy metal detection was suitable for Europe

RoHS standard, and 61.4% of biodegradation compared to cellulose was shown after measuring biodegradation for 45 days, and thus it was suitable for ASTM D6494 standard and UAE S 50009 standard.

Moreover, in test for maintain freshness, discoloration, decline and rancid of packed fruits or vegetables were effectively progibited in the oxo-biodegradable transparent bio wrap film of the present invention, and thus it was fit for maintaining freshness. [UTILITY]

The oxo-biodegradable transparent bio wrap film of the present invention using biomass and biodegradable «catalyst have excellent biodegradation and mechanical properties and organic carbon content was suitable for biomass plastic standard of

United States Department of Agriculture as well as was advantageous for maintaining freshness of food.

The oxo-biodegradable transparent bio wrap film of the present invention can be utilized for various products such as echo- friendly packaging and bio-filaments for 3D printer as well as food packing materials, and the ripple effect of the film would be significant in industry.

@

OXO-BIODEGRADABLE NTN. JU. USING BIOMASS AND

BIODEGRADATION CATALYST : Sp 2 J

Ws [FIELD OF THE INVENTION]

The present invention relates to a bio-wrap film, more particularly, oxo-biodegradable transparent bio wyap film composition using biomass and biodegradation catalyst, a transparent bio wrap film manufactured through extrusion of the composition, and a manufacturing method thereof, where carbon neutral-type plant plasticizer, epoxided soybean o0il and components for maintaining freshness are added to vinyl chloride resin as a main raw material, and then raw composition for food packing materials is prepared and extruded in type of a film, and thus carbon reduction, biodegradable property and freshness maintenance are accomplished as well as excellent transparency, flexibility and mechanical properties are harmoniously implemented. [BACKGROUND OF THE INVENTION]

It 1s necessary to develop technology not contaminating environment under increased importance of the environment.

Plastics are not decayed and thus is recognized as a cause of environment pollution. However, degradable plastics are being developed actively and the needs for the degradable plastics is augmented.

Bio plastics is classified into Bio degradable plastics, Oxo- biodegradable plastics and bio based plastics. Oxo- biodegradable plastics, made of bio based plastics and oxo- biodegradable additives, are plastics in which OXO~— biodegradable additives are added to plastics containing 25% or more of biomass originated from a plant such as corn. The raw materials of the oxo-biodegradable plastics are synthesized during photosynthesis roqui ting carbon dioxide (CO3) .

Consequently, the oxo-biodegradable plastics reduce CO; emissions, save limited petroleum, and are decomposed by microorganism. Additionally, it is popular as an eco-friendly material in view of property improvement and cost competitiveness.

Bio based plastics among bio plastics as eco-friendly materials could conquer problems such as early biodegradation, property decline, low cost competitiveness and difficult recycle, and thus it is industrialized rapidly. Plant Bottle in Japan was spotlighted as a pet bottle in which about 30% of bio ethanol extracted from sugar cane was added to PET material, and

CocaCola developed ‘Plant Bottle’ and commercialized it.

Consequently Cocacola sold 20 billon bottles in 20 countries from 2009 to now, and has a plan to develop a product with increased bio ethanol. Samsung Electronics applied sugar cane- added bio plastics to TV accessories such as remote controller and manual. Additionally, the Samsung Electronics uses echo- friendly box made of pure recycled paper and plant soybean ink certified by American Soybean Association in premium smart TV and UHD TV. Moreover, bio plastics are being used in food containers including portable side-dish boxes, box set for kids, bio vinyl, food boxes, mulching films for agriculture and disposable products as well as in field of a vehicle and construction materials. More recently, many of countries manage identification label programs for bio plastics and grant certification label while restricting usage of non- biodegradable plastics. Particularly, UAE legislated relevant laws from 2009 and regulated disposable products and trash bags from January in 2012. Also, UAE permitted to import and distribute only to oxo-biodegradable packing materials and products thereof from Jan. 1, 2014 as well as banned non- biodegradable plastics. As a result, other countries is

’ planning to respond to regulations of plastics in UAE.

It is expected that market share of bio plastic would take 10% or more after 2016 although it took 1 to 5% at the beginning of this century, because of needs for echo-friendly products and development of companies. However, the bio plastics have restricted scope in the market. The bio plastic products are expensive 2-3 times more than existing plastic products because of increased cost of raw materials, and has a property lower than existing plastic products. In other words, there still are problems which should be resolved for application in industry.

Recently, a bio plastic product were developed, to which carbon reduced plant biomass, general plastics, biodegradable resins, biodegradable catalysts, oxidizing agents and compatibilizers are added. The bio plastic product improved a property but had low plasticity and had low physical property of a film made of it for thin packing materials. [PRIOR ARTS] [OTHER PUBLICATIONS] (Publication 001) Guillet, J. E., “Polymers and Ecological

Problems,” Baum, B. and White, R.A. (eds.). Plenum Press, New

York, 1973, pp. 45-60. [DETAILED DESCRIPTION OF THE INVENTION] [PROBLEMS TO BE SOLVED]

The purpose of the present invention 1s to provide an oxo- biodegradable transparent bio wrap film where carbon reduction, biodegradable property, freshness maintenance, transparency, flexibility and mechanical properties are harmoniously implemented. : [SOLUTION]

For solving the above problems, the present invention provides oxo-biodegradable transparent bio wrap film composition using biomass and biodegradation catalyst, comprising: 100 parts by weight of a thermoplastic resin as a main raw material; 39 parts by weight of an ester plasticizer as a first plasticizer; 9 parts by weight of a carbon neutral-type plant plasticizer as a second plasticizer; 1.5 parts by weight of a polyhydric alcohol fatty acid ester as an anti-fogging agent; 1 parts by weight of calcium-zinc-based organic composite heat stabilizer as a heat stabilizer; 1 part by weight of an oxo biodegradable pellet containing biomass as an oxo-biodegradable catalyst; and 0.001 parts by weight of a metal-coated zeolite powder as an additive for maintaining freshness; the thermoplastic resin is polyvinyl chloride (PVC) having 950 to 1050 degree of polymerization, 300 to 350mm of particle size distribution and 0.51 to 0.59 g/cc of specific gravity; the first plasticizer is a mixture of Glyceryl laurate diacetate and Diisononyl hexahydrophthalate with ratio 5:5 in weight; the second plasticizer is an epoxided soybean oil; the anti-fogging agent is a polyglycerol monooleate; the heat stabilizer is a mixture of salt of fatty acid of calcium-zinc having at least one fatty acid selected from a group of lauric acid, oleic acid, benzoic acid, behenic acid, stearic acid and ricinoleic acid; the oxo- biodegradable catalyst consists of biomass, binder resin, wax, aliphatic polyesters, sorbitol, calcium carbonate and stearic acid; the additive is zeolite powder where titanium is coated on surface of the zeolite; the oxo-biodegradable transparent bio wrap film composition using biomass and biodegradation catalyst is used as raw material for food packing; biodegradability of an oxo-biodegradable transparent bilo wrap film extruded from compositions comprising biomass and biodegradation catalyst, measured by a method of KSM-3100-1 for 45 days, 1s 61.4% comparted to cellulose powder as a standard material.

In another respect of the present invention, the present invention provides an oxo-biodegradable transparent bio wrap film, extruded from the composition.

Specifically, the present invention provides an OXO- biodegradable transparent bio wrap film, having 2.2 to 4.2 kg f / mr of tensile strength, 262 to 402% of elongation, 259 to 396% of maximum load elongation, 3 of haze value and 10 to 15 um of thickness.

In another respect of the present invention, the present invention provides A method for producing the oxo-biodegradable transparent bio wrap film, comprising: preparing a mixture by mixing for 12 minutes with maintaining conditions of 1,400 rpm and 140 += 5 C after input of each raw material in a super mixer; extruding the mixture with maintaining conditions of 180 to 200 CT of screw temperature, 200 to 205 CT of T-DIE temperature using a extruder with 90 mm of diameter and 28 of L / D; manufacturing a film with 12 im of thickness through a winder roll after making passing a cooling roll No.l, No.2 and No.3 at 20 to 26 TC. [EFFECT OF THE INVENTION]

Oxo-biodegradable composition according to the present invention contains high amount of organic carbon originated from biomass and thus has excellent carbon reduction efficiency.

Oxo-biodegradable composition according to the present invention has distinguished mechanical property such as tensile strength, elongation and maximum load elongation, and thus can be used in various soft and hard products requiring flexibility such as Dbiofilaments for 3D printer, packing materials and packing films.

Further, an oxo-biodegradable wrap film according to the present invention has outstanding freshness maintenance and thus can be used as food packing materials, particularly.

Additionally, an oxo-biodegradable wrap film according to the present invention has high transparency and thus can be used in various products requiring transparency.

Moreover, an oxo-biodegradable wrap film according to the present invention is degraded when abolished and thus it does not cause environmental problems. [BRIEF DESCRIPTION OF THE DRAWINGS]

FIG. 1l(a) is a schematic diagram of a method for manufacturing oxo-biodegradable transparent wrap film composition and a wrap film for food packing manufactured by the method.

FIG. 2, FIG. 3 and FIG. 4 depict a graph of tensile strength, elongation and maximum load elongation in control without oxo-biodegradable catalysts and an oxo-biodegradable transparent wrap film.

FIG. 5 depicts a graphic representation of exposure by oxidative degradation and biodegradation, and a standard guide for the test.

FIG. 6 and FIG. 7 depict a graph of average biodegradation of cellulose and an oxo-biodegradable transparent bic wrap film.

FIG. 8 and FIG. 9 depicts a flow chart of a method of six

Claims

<r RS [CLAIMS] RE

1. Oxo-biodegradable transparent bio wrap film composi on using biomass and biodegradation catalyst, comprising: 100 parts by weight of a thermoplastic resin s a main raw material; 39 parts by weight of an ester plasticizer as a first plasticizer; 9 parts by weight of a carbon neutral-type plant plasticizer as a second plasticizer;

1.5 parts by weight of a polyhydric alcohol fatty acid ester as an anti-fogging agent; 1 parts by weight of calcium-zinc-based organic composite heat stabilizer as a heat stabilizer; 1 part by weight of an oxo biodegradable pellet containing biomass as an oxo-biodegradable catalyst; and

0.001 parts by weight of a metal-coated zeolite powder as an additive for maintaining freshness; wherein the thermoplastic resin is polyvinyl chloride (PVC) having 950 to 1050 degree of polymerization, 300 to 350um of particle size distribution and 0.51 to 0.59 g/cc of specific gravity; wherein the first plasticizer is a mixture of Glyceryl laurate diacetate and Diisononyl hexahydrophthalate with ratio 5:5 in weight; wherein the second plasticizer is an epoxided soybean oil; wherein the anti-fogging agent is a polyglycerol monooleate; wherein the heat stabilizer is a mixture of salt of fatty acid of calcium-zinc having at least one fatty acid selected from a group of lauric acid, oleic acid, benzoic acid, behenic acid, stearic acid and ricinoleic acid; wherein the oxo-biodegradable catalyst consists of biomass, binder resin, wax, aliphatic polyesters, sorbitol, calcium carbonate and stearic acid; wherein the additive is zeolite powder where titanium is coated on surface of the zeolite; wherein the oxo-biodegradable transparent bio wrap film composition using biomass and biodegradation catalyst is used as raw material for food packing; wherein biodegradability of an oxo-biodegradable transparent bio wrap film extruded from compositions comprising biomass and biodegradation catalyst, measured by a method of KSM-3100-1 for 45 days, is 61.4% comparted to cellulose powder as a standard material.

2. An oxo-biodegradable transparent bio wrap film, extruded from the composition according to the claim 1.

3. The oxo-biodegradable transparent bio wrap film of the claim 2, having 2.2 to 4.2 kg f / mm of tensile strength, 262 to 402% of elongation, 259 to 396% of maximum load elongation, 3 of haze value and 10 to 15 um of thickness.

4. A method for producing the oxo-biodegradable transparent bio wrap film according to claim 2, comprising: preparing a mixture by mixing for 12 minutes with maintaining conditions of 1,400 rpm and 140 + 5 TC after input of each raw material in a super mixer; . extruding the mixture with maintaining conditions of 180 to 200 CT of screw temperature, 200 to 205 CT of T-DIE temperature using a extruder with 90 mm of diameter and 28 of L / D;

manufacturing a film with 12 um of thickness through a winder roll after making passing a cooling roll No.l, No.2 and No.3 at to 26 TC.