KR20220025588A - Eco-friendly cushion Packaging - Google Patents

Abstract

The present invention relates to an eco-friendly inflatable packaging material, and more specifically provides the eco-friendly inflatable packaging material comprising: a biodegradable film layer having an internal space and having an air injection unit formed on one side thereof; and an air layer formed in the internal space. In addition, if necessary, a paper layer may be additionally laminated on at least one surface of the biodegradable film layer. Accordingly, the eco-friendly inflatable packaging material according to the present invention has excellent biodegradability, so that it is possible to solve an environmental problem caused by an increasing amount of waste in the logistics industry.

Description

Eco-friendly inflatable packaging material {Eco-friendly cushion Packaging}

The present invention relates to an eco-friendly inflatable packaging material. More specifically, the inner space is formed, one side of the biodegradable film layer in which an air injection part is formed; An eco-friendly inflatable packaging material including; an air layer formed in the inner space is provided. In addition, if necessary, a paper layer may be additionally laminated on one surface of the biodegradable film layer. Accordingly, the eco-friendly inflatable packaging material has excellent biodegradability, so it can solve the environmental problem caused by the increasing amount of waste in the logistics industry.

Packaging or packaging means the activity of manufacturing using technology for containers used to promote product protection and convenience during distribution, or materials and additives used for that purpose. Packaging materials can be mainly classified into paper, plastic, metal, glass, etc., and are widely used in industries such as food and electronic products. These packaging materials are mainly used for online shopping in the domestic retail market, and the online market has shown a very rapid growth rate compared to other shopping markets such as large marts and department stores. In particular, the proportion of mobile shopping has overwhelmingly increased since 2015, driving the growth of the overall online shopping market. In other words, as information access is expanded due to the development of the information and communication industry, and product price comparison becomes easier, consumers purchase the 'lowest price' by using offline stores such as department stores and outlets, Internet malls, and mobile shopping together. Smart consumers are on the rise. Simultaneously with the growth of the online shopping market, the size of the parcel delivery market is continuously expanding.

In addition, a serious environmental problem is emerging in the parcel logistics market, in which a huge amount of waste is generated in the process. In order to solve these environmental problems, excessive packaging is reduced or plastic substitutes such as fine dust and waste plastic are used, and eco-packaging is introduced to reduce carbon emission. An increase in interest in environmental protection leads to an increase in the demand for environment-related technology development. Accordingly, research and development for sustainability and recyclable environment-friendly packaging materials are being actively conducted.

For example, Korean Patent Application Laid-Open No. 10-2015-0082356 discloses a biodegradable packaging material and a manufacturing method thereof. More specifically, (i) 20 to 95% by weight of polylactide having a high melt index exceeding 35 g/10 min, (ii) 5 to 80% by weight of polybutylene succinate (PBS) or a biodegradable derivative thereof; and (iii) co-extruding one or more polymer coating layers comprising at least one layer of a polymer mixture consisting of 0 to 5 wt % of one or more polymer additives on the textile substrate. Accordingly, it improves extrudability, increases the machine speed during extrusion, maintains excellent adhesion to the substrate and excellent heat sealing properties of the coating, and can be applied to disposable beverage cups, board trays, and sealed carton packages for solids and liquids. mentioning

For another example, Korean Patent Application Laid-Open No. 10-2007-0106679 includes a paper-based substrate having a first copolyester layer and a second copolyester layer adhered on at least one surface of the substrate, Disclosed is a biodegradable laminate suitable for use in molded articles based on paper, such as containers for liquid or solid, hot or cold food products, substantially free of a polymer layer interposed between the surface and the copolyester adhered on the surface of the substrate. are doing

Lastly, Korean Patent Publication No. 10-1674627 discloses a biodegradable packaging material that can be heat-sealed. The packaging material of the present invention includes a fiber substrate, an inner coating layer positioned adjacent to the substrate, and an outer coating layer constituting an outer surface of the material, wherein the inner coating layer improves adhesion between polylactide and the layer and the fiber substrate. It contains biodegradable polyester mixed with polylactide for this purpose, and the outer coating layer contains biodegradable polyester mixed with polylactide and polylactide to improve heat-sealability of the layer, wherein the inner layer It discloses that the polylactide content of the outer layer is higher than the polylactide content of the outer layer.

As mentioned above, research on biodegradable eco-friendly resins and products to which they are applied is being actively conducted. However, there is no mention of applying these resins to one-time packaging or packaging materials that occur in the parcel delivery market. Biodegradable packaging materials are environmentally friendly, and paper packaging materials are in the spotlight as eco-friendly packaging materials because they are the cheapest and can be recycled. was completed.

(Patent Document) Korean Patent Publication No. 10-2015-0082356 (2015.07.15)

(Patent Document) Korean Patent Laid-Open Publication No. 10-2007-0106679 (2007.11.05)

(Patent Document) Korean Patent Publication No. 10-1674627 (2016.11.09)

An object of the present invention is to solve all of the above problems.

An object of the present invention is to reduce waste generated in the process of the increasing courier logistics industry.

An object of the present invention is to solve environmental problems by providing a packaging material that can be biodegradable using a biodegradable resin.

It is an object of the present invention to easily laminate a biodegradable film layer on a paper layer by thermal fusion, thereby improving productivity.

In order to achieve the object of the present invention as described above and to realize the characteristic effects of the present invention to be described later, the characteristic configuration of the present invention is as follows.

According to an embodiment of the present invention, the inner space is formed, one side of the biodegradable film layer is formed with an air injection portion; An eco-friendly inflatable packaging material including; an air layer formed in the inner space is provided.

In addition, if necessary, a paper layer on at least one surface of the biodegradable film layer; may be additionally laminated. In this case, the thickness of the biodegradable film layer is 5 μm to 150 μm, and the thickness of the paper layer is 5 μm to 150 μm.

In addition, the paper layer may include at least one selected from kraft paper, tarpaulin paper, paraffin paper, non-woven fabric, and chemical fiber paper.

According to an embodiment of the present invention, the paper layer may be formed by thermal fusion with the biodegradable film layer, and in this case, the thermal fusion temperature may be performed at 100°C to 300°C.

According to an embodiment of the present invention, the biodegradable film layer includes a biodegradable adhesive resin, for example, thermoplastic starch (TPS), polylactic acid (PLA), polybutylene adipate terephthalate (PBAT), Polycaprolactone (PCL), polybutylene succinate (PBS), polyglycolic acid (PGA), polyhydroxyalkanoate (PHA), polyhydroxybutyrate (PHB), polyhydroxyvalerate (PHV) , polyhydroxybutyrate-hydroxyvalerate copolymer (PHBV), cellulose, chitin and chitosan may be provided, including at least one selected from the group consisting of.

More specifically, in the biodegradable film layer, the biodegradable adhesive resin may include polylactic acid (PLA): polybutylene adipate terephthalate (PBAT) in a weight ratio of 1: 1 to 10.

In addition, in the biodegradable film layer, the biodegradable adhesive resin may include polylactic acid (PLA): polybutylene succinate (PBS) in a weight ratio of 1: 1 to 3 weight ratio.

In addition, in the biodegradable film layer, the biodegradable adhesive resin may include polybutylene adipate terephthalate (PBAT): polybutylene succinate (PBS) in a weight ratio of 1 to 5: 1 by weight.

According to an embodiment of the present invention, the thermoplastic starch comprises at least one selected from rice starch, wheat starch, corn starch, sweet potato starch, potato starch, tapioca starch, cassava starch, and modified starches thereof. do.

According to an embodiment of the present invention, the biodegradable adhesive resin further contains calcium carbonate, and in this case, it is characterized in that it contains 1 to 50 parts by weight of calcium carbonate based on 100 parts by weight of the biodegradable adhesive resin.

According to an embodiment of the present invention, the weight average molecular weight of the biodegradable adhesive resin is characterized in that 10,000 to 1,000,000.

In addition, the biodegradable adhesive resin has a melting temperature of 100°C to 300°C, and a melt index of 1 to 100g/10min at 2.16Kg at 190°C based on ASTM D1238.

The eco-friendly air-injected packaging material according to the present invention may be provided as a cushioning material in the distribution box to provide a shock mitigating role.

The eco-friendly air-injectable packaging material according to the present invention can reduce the amount of waste generated in the process of the logistics industry increasing in modern society. That is, it is possible to provide a nature-friendly packaging material by reducing environmental pollution caused by environmental hormones or dioxins generated during disposal due to combustion or landfill.

In addition, since the eco-friendly air-injecting packaging material according to the present invention is biodegradable, it can contribute to solving environmental problems.

The eco-friendly air-injection packaging material according to the present invention can be easily manufactured by simple bonding by thermal fusion, thereby improving productivity.

1 is a view showing an example of an eco-friendly inflatable packaging material according to the present invention.
2 is a view showing an example of an eco-friendly inflatable packaging material according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The detailed description of the present invention set forth below refers to, by way of illustration, specific embodiments in which the present invention may be practiced. These embodiments are described in sufficient detail to enable those skilled in the art to practice the present invention. It should be understood that the various embodiments of the present invention are different but need not be mutually exclusive. For example, certain shapes, structures, and characteristics described herein with respect to one embodiment may be implemented in other embodiments without departing from the spirit and scope of the invention. In addition, it should be understood that the location or arrangement of individual components within each disclosed embodiment may be changed without departing from the spirit and scope of the present invention. Accordingly, the detailed description set forth below is not intended to be taken in a limiting sense, and the scope of the present invention, if properly described, is limited only by the appended claims, along with all scope equivalents as those claimed.

Hereinafter, in order to enable those of ordinary skill in the art to easily practice the present invention, it will be described in detail with reference to preferred embodiments of the present invention.

Biodegradable of the present invention means a plastic that is decomposed into water and CO ₂ or CH ₄ by microorganisms such as bacteria, algae, and mold. It means that the molecular weight is reduced by breaking the main chain of the polymer as well as the physical breakdown of molded products such as plastics.

According to an embodiment of the present invention, the inner space is formed, one side of the biodegradable film layer 100 in which the air injection unit 400 is formed; An eco-friendly inflatable packaging material including; an air layer 300 formed in the inner space is provided. This may refer to FIG. 1 .

In addition, if necessary, the paper layer 200 may be further laminated on at least one surface of the biodegradable film layer 100 . This may refer to FIG. 2 .

Looking at the thickness, the thickness of the biodegradable film layer 100 is 5㎛ to 150㎛, the thickness of the paper layer may be provided in the 5㎛ to 150㎛. Preferably, the thickness of the biodegradable film layer 100 is 10 μm to 100 μm, and the thickness of the paper layer 200 may be 15 μm to 100 μm.

The biodegradable film layer 100 includes a biodegradable adhesive resin, which may be a hot melt adhesive resin. For example, thermoplastic starch (TPS), polylactic acid (PLA), polybutylene adipate terephthalate (PBAT), polycaprolactone (PCL), polybutylene succinate (PBS), polyglycolic acid (PGA), Polyhydroxyalkanoate (PHA), polyhydroxybutyrate (PHB), polyhydroxyvalerate (PHV), polyhydroxybutyrate-hydroxyvalerate copolymer (PHBV), cellulose, chitin and chitosan It is characterized in that it comprises at least any one or more. Preferably, polylactic acid (PLA), polybutylene adipate terephthalate (PBAT) and polybutylenesuccinate (PBS) may be provided.

Polylactic acid (PLA) is _a resin manufactured by polymerizing lactic acid obtained by fermenting starch extracted from renewable plant resources (corn, potato, sweet potato, etc.) Since it is a resin, it can be substituted for petroleum-based resins. In the present invention, polylactic acid (PLA) can be provided as a biodegradable adhesive resin to provide an environmentally friendly resin with excellent biodegradability even when discarded.

Polybutylene adipate terephthalate (PBAT) refers to a polymer obtained through ester reaction and polycondensation reaction using 1,4-butanediol and dimethyl terephthalate, an aromatic component, as raw materials as an aliphatic glycol. In the present invention, by providing such polybutylene adipate terephthalate (PBAT), it is possible to provide durability, appropriate biodegradability over time, and excellent processability.

Polybutylenesuccinate (PBS) is an aliphatic polyester and is prepared by polycondensation followed by chain extension with a polyfunctional isocyanate. PBS is a compound of 1,4-butanediol and succinic acid. Although most are synthesized from petroleum, it is also possible to produce their monomers from bio-derived feedstocks. In the present invention, polybutylene succinate is provided as a biodegradable resin to provide excellent degradability and suitable physical properties required when plastics are provided for packaging purposes.

Looking in more detail, the biodegradable film layer 100 is characterized in that the weight ratio of polylactic acid (PLA): polybutylene adipate terephthalate (PBAT) is 1: 1 to 10. Preferably, it may be provided in a ratio of 1: 1 to 8.

In addition, the biodegradable film layer 100 is characterized in that the weight ratio of polylactic acid (PLA): polybutylene succinate (PBS) is 1: 1 to 5. Preferably, 1: 1 to 3 may be provided.

In addition, the biodegradable film layer 100 is characterized in that the weight ratio of polybutylene adipate terephthalate (PBAT): polybutylene succinate (PBS) is 1 to 5: 1. Preferably, it may be provided in a ratio of 1 to 3: 1.

Including the above range, it is possible to provide excellent biodegradability while providing properties similar to those of petroleum resins based on polyethylene and the like. This can be confirmed from the results of Table 1, which will be described later.

According to an embodiment of the present invention, the thermoplastic starch comprises at least one selected from rice starch, wheat starch, corn starch, sweet potato starch, potato starch, tapioca starch, cassava starch, and modified starches thereof. do it with

Thermoplastic starch refers to a granular material obtained from plants and composed of two components, amylose and amylopectin. The modified starch may be provided such as α-starch, acid-treated starch, oxidized starch, cationic starch, ester starch, ether starch, and the like in which starch is physically or chemically treated. In the case of the starch, it has excellent biodegradability, is composed of amylose and amylopectin, and the glucose of amylose contains a hydroxy (-OH) group, so it has hydrophilicity and hydrogen bonding. As a renewable resource, they can effectively cope with the problem of petroleum resource depletion, and provide excellent biodegradability.

According to one embodiment of the present invention, the biodegradable adhesive resin is characterized in that it further comprises calcium carbonate. In this case, with respect to 100 parts by weight of the biodegradable adhesive resin, 1 to 50 parts by weight of calcium carbonate is included. When it exceeds 50 parts by weight, there is a problem in that the mechanical strength is lowered, and when it is less than 1 part by weight, there is a problem in that productivity decreases due to the occurrence of a blocking phenomenon and additionally, another slip agent or anti-blocking agent must be used. Therefore, it is possible to solve these problems by providing the above range, and to provide the effect of improving the hiding power and whiteness of the biodegradable article and reducing the glossiness.

According to an embodiment of the present invention, the biodegradable adhesive resin may further include additional components as needed. For example, antioxidants, heat stabilizers, UV stabilizers, compatibilizers, lubricants, antistatic agents and mineral oil may be added.

According to an embodiment of the present invention, the paper layer 200 is characterized in that it includes at least one selected from kraft paper, tarpaulin paper, paraffin paper, and chemical fiber paper. Preferably, by providing kraft paper, which is a representative eco-friendly paper, it is possible to provide a nature-friendly packaging material by reducing environmental pollution, and it is also advantageous in terms of degradability at the time of disposal. In addition, it is economical because the production cost is low.

In addition, the paper layer 200 laminated on one surface of the biodegradable film layer 100 may be formed by thermal fusion. By simply bonding the biodegradable film layer 100 itself or the film layer 100 and the paper layer 200 by thermal fusion, it is easy to manufacture and thus productivity can be improved.

In addition, the biodegradable film layer 100 and the paper layer 200 are bonded by the thermal fusion, and air is injected into the air injection unit 400 formed on one side of the biodegradable film layer 100 to form the biodegradable film layer. (100) The air layer 300 is formed in the surrounding inner space is provided as a cushioning material in the distribution box can provide a shock mitigation role.

According to an embodiment of the present invention, the thermal fusion may be performed at 100°C to 300°C. The pressure may be conducted at 1 to 3 atmospheres, and excellent adhesion may be provided by excellent thermal decomposition and fusion under the above conditions.

According to one embodiment of the present invention, the weight average molecular weight of the biodegradable adhesive resin is characterized in that 10,000 to 1,000,000.

In addition, the melting temperature of the biodegradable adhesive resin is 100 ° C to 300 ° C, and the melt index is 1 to 100 g/10 min at 2.16 Kg at 190 ° C based on ASTM D1238. The melting temperature may be measured by differential scanning calorimetry (DSC) or dynamic mechanical analysis (DMA), which are commonly measured methods, and the melt index (MFI, Melt Flow Index) is determined by ASTM D1238. It is measured. When the hot melt resin is adhered to the paper in the above range, it is possible to provide desirable flowability and workability.

Hereinafter, the configuration and operation of the present invention will be described in more detail through preferred embodiments of the present invention. However, this is presented as a preferred example of the present invention and cannot be construed as limiting the present invention in any sense.

Content not described here will be omitted because it can be technically inferred sufficiently by a person skilled in the art.

Example 1

A film layer was prepared using PLA, which is a biodegradable resin. PLA pellets (Ingeo Biopolymer 2003D (MFI 6) of Natureworks) were used to prepare a film layer using a T-Die Casting Film Machine.

Kneading and film forming were performed using Dongguan Machinery's T-Die Casting Film Machine (XH-432-25-300). The film layer forming conditions were 12cm to 15cm in width, 150℃ to 200℃ for cylinder, 180℃ to 200℃ for die, and 30 rpm for screw speed, and a film layer with a thickness of 25㎛ was prepared.

Example 2

It was prepared in the same manner as in Example 1 except that PBAT (Polybutylene adipate terephthalate, Soltech, Solpol 1000, MFI 3) was used as a biodegradable resin.

Example 3

It was prepared in the same manner as in Example 1, except that PBS (Polybutylene Succinate, Soltech, Solpol 5000, MFI 4) was used as a biodegradable resin.

Example 4

It was prepared in the same manner as in Example 1, except that PLA and PBAT (weight ratio 1:1) were mixed as biodegradable resins. For mixing (compounding), a 25mm, L/D=40 twin screw extruder (JWELL’s CJWH-25) was used. Cylinder 150℃ to 200℃, die 180℃ to 200℃, screw 60 rpm speed, equipment Pellets were prepared by maintaining a load of 60% or less, and the prepared resin composition was dried overnight in a vacuum oven at 50° C. and then used.

Example 5

It was prepared in the same manner as in Example 4, except that PLA and PBAT (weight ratio 1:3) were used as biodegradable resins.

Example 6

It was prepared in the same manner as in Example 4, except that PLA and PBS (weight ratio 1:3) were used as biodegradable resins.

Example 7

It was prepared in the same manner as in Example 4 except that PBAT and PBS (weight ratio 1:1) were used as biodegradable resins.

Example 8

It was prepared in the same manner as in Example 4, except that PBAT and PBS (weight ratio 3:1) were used as biodegradable resins.

Example 9

PLA and PBAT (weight ratio 1:8) were used as biodegradable resins, and were prepared in the same manner as in Example 4, except that calcium carbonate (Calcium Carbonate, Ohmy Korea, Hydrocarb 95T-KU) was included. In this case, with respect to 100 parts by weight of the biodegradable resin, 10 parts by weight of calcium carbonate is included.

Example 10

It was prepared in the same manner as in Example 1, except that TPS (Thermoplastic Starch, R&F Chemical, TAPIOPLAS) was used as the biodegradable resin.

Example 11

As a biodegradable resin, PLA (Ingeo Biopolymer 2003D (MFI 6) of Natureworks) was used to coat the film layer on kraft (grammage weight 35g/m ² ) paper, which is a paper layer.

A film was coated on one side of the paper layer using a T-Die Casting Film Machine with PLA pellets. Kneading and film forming were performed using Dongguan Machinery's T-Die Casting Film Machine (XH-432-25-300). The forming conditions of the film layer were 12cm to 15cm in width, 200℃ to 300℃ for cylinder, 250℃ to 300℃ for die, and 60 rpm for screw speed, and a 25㎛ film layer was coated on one side of the paper layer. In order to increase the bonding force between the film layer and the paper layer, a corona-treated kraft paper was used, and after coating the film layer on one side of the paper layer, pressure was applied with a rubber roll.

Example 12

A biodegradable resin was prepared in the same manner as in Example 11, except that PBAT (Polybutylene adipate terephthalate, Soltech, Solpol 1000, MFI 3) was used.

Example 13

It was prepared in the same manner as in Example 11, except that PBS (Polybutylene Succinate, Soltech, Solpol 5000, MFI 4) was used as the biodegradable resin.

Example 14

It was prepared in the same manner as in Example 12, except that PLA and PBAT (weight ratio 1:1) were mixed as biodegradable resins. For mixing (compounding), a 25mm, L/D=40 twin screw extruder (JWELL’s CJWH-25) was used. Cylinder 150℃ to 200℃, die 180℃ to 200℃, screw 60 rpm speed, equipment Pellets were prepared by maintaining a load of 60% or less, and the prepared resin composition was dried overnight in a vacuum oven at 50° C. and then used.

Example 15

It was prepared in the same manner as in Example 14, except that PLA and PBAT (weight ratio 1:3) were used as biodegradable resins.

Example 16

It was prepared in the same manner as in Example 14, except that PLA and PBS (weight ratio 1:3) were used as biodegradable resins.

Example 17

It was prepared in the same manner as in Example 14, except that PBAT and PBS (weight ratio 1:1) were used as biodegradable resins.

Example 18

It was prepared in the same manner as in Example 14, except that PBAT and PBS (weight ratio 3:1) were used as biodegradable resins.

Example 19

PLA and PBAT (weight ratio 1:8) are used as biodegradable resins, and calcium carbonate (Calcium Carbonate, Ohmy Korea, Hydrocarb 95T-KU) is included, in this case, with respect to 100 parts by weight of the biodegradable resin, calcium carbonate is 10 including parts by weight. Except for this, it was prepared in the same manner as in Example 14.

Example 20

It was prepared in the same manner as in Example 14, except that TPS (Thermoplastic Starch, R&F Chemical, TAPIOPLAS) was used as the biodegradable resin.

Comparative Example 1

The same procedure as in Example 1 was performed except that PE (LDPE, Low Density Polyethylene, Hanwha Solution 5321) was used as the resin.

Comparative Example 2

The same procedure as in Example 11 was performed except that PE (LDPE, Low Density Polyethylene, Hanwha Solution 5321) was used as the resin.

Experimental Example 1: Eco-friendliness

In order to determine the eco-friendliness of Examples and Comparative Examples, ASTM D 6400 and ASTM D 6954 were measured. The degree of decomposition according to the decomposition period was measured, and the degree of decomposition was indicated by ◎ if the compostability was 60% or more decomposed within 180 days and × if it was not decomposed. The results are shown in Table 1.

Experimental Example 2: Measurement of compostability

In order to determine the compostability of Examples and Comparative Examples, ASTM D 6400 and ASTM D 6954 were measured. The degree of decomposition according to the decomposition period was measured. The degree of decomposition is marked with an x when more than 90% decomposition within 180 days ◎ 60% decomposition within 180 days ○ 30% decomposition within 180 days △ less than 30% decomposition within 180 days The results are shown in Table 1.

Experimental Example 3: Dynamic/static air holding force measurement

In order to determine the air dynamic / static holding capacity of Examples and Comparative Examples, UTM, respectively, were measured using a fixing frame having a weight of 1 kg. The dynamic air holding force was measured by compressing the air cushion sample prepared in the size of 150x150x45mm ³ at a constant speed of 10mm/min and measuring the maximum load, which was measured by QM100T-2T, a universal material testing machine (UTM) from Cumersys. The static air holding power is measured by placing an air cushion sample prepared in the size of 150x150x45mm ³ on the air cushion and placing it at room temperature for 3 days. The static air holding force was measured by calculation. The results are shown in Table 1.

Experimental Example 4: Adhesion rate measurement

In the case of Examples and Comparative Examples, a film or a film layer and a paper layer were adhered using a LOVERO impulse sealer (SK-F600). The width of the bonding surface was 5 mm, and the bonding time was adjusted using a timer attached to the top surface. The adhesion time was recorded without peeling by hand by bonding at 0.5 second intervals starting from 2 seconds. The results are shown in Table 1.

　
　 Resin type
(weight%)
eco-friendliness compostable dynamic air
Holding Power (kgf) static air
Holding Power (%) adhesion
speed (sec) Example 1 PLA ○ ◎ - - 3.5 Example 2 PBAT ○ ◎ 9.8 96.1 3.0 Example 3 PBS ○ ◎ 11.2 94.5 3.5 Example 4 PLA/PBAT=50/50 ○ ◎ 7.4 97.2 4.5 Example 5 PLA/PBAT=25/75 ○ ◎ 7.9 96.2 4.0 Example 6 PLA/PBS=25/75 ○ ◎ 8.1 97.8 3.5 Example 7 PBAT/PBS=50/50 ○ ◎ 7.5 97.2 4.5 Example 8 PBAT/PBS=75/25 ○ ◎ 9.5 95.8 3.5 Example 9 PLA/PBAT/CaCO ₃ ○ ◎ 10.1 96.8 3.5 Example 10 TPS ○ ◎ - - 3.5 Example 11 PLA ○ ◎ - - 3.5 Example 12 PBAT ○ ◎ 9.6 95.8 3.0 Example 13 PBS ○ ◎ 10.9 95.1 3.5 Example 14 PLA/PBAT=50/50 ○ ◎ 8.5 96.2 4.5 Example 15 PLA/PBAT=25/75 ○ ◎ 7.4 95.3 4.0 Example 16 PLA/PBS=25/75 ○ ◎ 8.3 96.8 3.5 Example 17 PBAT/PBS=50/50 ○ ◎ 7.7 97.1 4.5 Example 18 PBAT/PBS=75/25 ○ ◎ 9.6 96.1 3.5 Example 19 PLA/PBAT/CaCO ₃ ○ ◎ 9.5 96.2 3.5 Example 20 TPS ○ ◎ - - 3.5 Comparative Example 1 PE X X 7.6 95.4 3.0 Comparative Example 2 PE X X 8.2 96.1 3.0

Referring to the results in Table 1 according to the embodiment according to the present invention, in the case of the eco-friendly inflatable packaging material according to the present invention, looking at the results of the eco-friendliness, not only 60% or more decomposition within 180 days, but also 180 days as a result of an experiment on compostability It was confirmed that more than 90% decomposition was possible within a short period of time. It can be expected that it has excellent biodegradability and can solve environmental problems by reducing the one-time packaging waste generated during the increasing logistics and transportation process.

In addition, in view of the fact that the dynamic air holding power and the static air holding power of the example have higher numerical values compared with the result value of the comparative example, it can be seen that more air can be retained in the packaging material. This can provide excellent physical properties as an eco-friendly air-injected packaging material in that it can further relieve the goods carried in the logistics transportation process from external impact.

In addition, in light of the fact that the eco-friendly air-injection packaging material has no difference compared to the comparative example, which is a conventional packaging material, the adhesion speed for thermal fusion of the film layer or the film layer and the paper layer is easy to manufacture by simple bonding to improve productivity It was confirmed that it can be done.

In the above, the present invention has been described with specific items such as specific components and limited embodiments, but these are only provided to help a more general understanding of the present invention, and the present invention is not limited to the above embodiments. Those of ordinary skill in the art to which the invention pertains can devise various modifications and variations from these descriptions.

Therefore, the spirit of the present invention should not be limited to the above-described embodiments, and not only the claims described below but also all modifications equivalently or equivalently to the claims described below belong to the scope of the spirit of the present invention. will do it

100: film layer
200: paper layer
300: air layer
400: air inlet

Claims (14)

A biodegradable film layer having an internal space and having an air injection unit formed on one side thereof;
An eco-friendly inflatable packaging material comprising a; an air layer formed in the inner space. According to claim 1,
An eco-friendly inflatable packaging material, characterized in that a paper layer is laminated on at least one surface of the biodegradable film layer. 3. The method of claim 2,
The biodegradable film layer has a thickness of 5 μm to 150 μm, and the paper layer has a thickness of 5 μm to 150 μm. According to claim 1,
The biodegradable film layer is a biodegradable adhesive resin, including thermoplastic starch (TPS), polylactic acid (PLA), polybutylene adipate terephthalate (PBAT), polycaprolactone (PCL), polybutylene succinate (PBS), Polyglycolic acid (PGA), polyhydroxyalkanoate (PHA), polyhydroxybutyrate (PHB), polyhydroxyvalerate (PHV), polyhydroxybutyrate-hydroxyvalerate copolymer (PHBV), An eco-friendly inflatable packaging material comprising at least one selected from cellulose, chitin and chitosan. 5. The method of claim 4,
The thermoplastic starch comprises at least one selected from rice starch, wheat starch, corn starch, sweet potato starch, potato starch, tapioca starch, cassava starch, and modified starches thereof. According to claim 1,
The biodegradable film layer is an eco-friendly inflatable packaging material, characterized in that the weight ratio of polylactic acid (PLA): polybutylene adipate terephthalate (PBAT) is 1: 1 to 10. According to claim 1,
The biodegradable film layer is an eco-friendly inflatable packaging material, characterized in that the weight ratio of polylactic acid (PLA): polybutylene succinate (PBS) is 1: 1 to 3. According to claim 1,
The biodegradable film layer is an eco-friendly inflatable packaging material, characterized in that the weight ratio of polybutylene adipate terephthalate (PBAT): polybutylene succinate (PBS) is 1 to 5: 1. According to claim 1,
The biodegradable film layer is an eco-friendly inflatable packaging material, characterized in that it contains 1 to 50 parts by weight of calcium carbonate based on 100 parts by weight of the biodegradable adhesive resin. 3. The method of claim 2,
The paper layer is an eco-friendly inflatable packaging material, characterized in that it comprises at least one selected from kraft paper, tarpaulin paper, paraffin paper, non-woven fabric and chemical fiber paper. 3. The method of claim 2,
The paper layer is an eco-friendly inflatable packaging material, characterized in that the outer layer formed of the biodegradable film layer is formed by thermal fusion. 12. The method of claim 11,
The heat-sealing is an eco-friendly air-injectable packaging material, characterized in that it proceeds at 100 ℃ to 300 ℃. 5. The method of claim 4,
The weight average molecular weight of the biodegradable adhesive resin is an eco-friendly inflatable packaging material, characterized in that 10,000 to 1,000,000. 5. The method of claim 4,
The biodegradable adhesive resin has a melting temperature of 100°C to 300°C, and a melt index of 1 to 100g/10min at 2.16Kg at 190°C based on ASTM D1238.

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