KR101682454B1 - Synthetic Resin Composition for bottle Materials - Google Patents

Abstract

The present invention relates to a synthetic resin composition for a beverage bottle material. The synthetic resin composition comprises a polyolefin resin and an additive. The additive is 0.06 parts by weight or more and 1.55 parts by weight or less with respect to 100 parts by weight of polyolefin. The additive, with respect to 100 parts by weight of polyolefin, comprises: 0.01-0.05 parts by weight of carboxylic acid amide, 0.01-0.3 parts by weight of a montanic acid derivative, 0.01-0.3 parts by weight of polyolefin wax, 0.01-0.3 parts by weight of fluorine resin, and 0.01-0.3 parts by weight of alkanol amide. Physical properties such as sealing properties and slip properties are improved, so a beverage can be safely stored. Also, a plastic cover or container which can be easily used and rarely generate smells can be produced.

Description

Technical Field [0001] The present invention relates to a synthetic resin composition for a beverage bottle,

The present invention relates to a synthetic resin composition for a beverage bottle material, and more particularly, to a synthetic resin composition which is excellent in sealing properties and is easy to open and has no odor.

Generally, polyolefin-based synthetic resin materials such as polypropylene, polyethylene and the like are used to produce beverage bottles for storing liquor, drinks, and the like. Beverage bottles can consist of containers and caps for plastic beverage bottles. Polypropylene and polyethylene, which are known to be harmless to human beings, are used as the main components of the synthetic resin that makes the plastic beverage bottles. In the case of polypropylene, Can also be used as a main component of a synthetic resin.

In order to prepare containers or caps for plastic beverage bottles using polyolefin-based synthetic resins, it is essential to add additives that are added to the synthetic resin in addition to the main components. Herein, the additive is mixed with a synthetic resin which is used for a plastic beverage bottle container or a plug to improve the physical properties of the synthetic resin. When the additive is mixed with the synthetic resin, the additive migrates to the surface thereby improving the physical properties of the container or cap for a plastic beverage container manufactured by covering the surface of the container or the container for a plastic beverage.

For example, by increasing the sealing torque associated with sealing the bottle and preventing impurities such as external dust or germs from entering the beverage, the beverage can be kept safer and longer. Further, by adding an additive to a synthetic resin, physical properties of a plastic beverage bottle cap are improved so that a young or aged person can open the beverage with a small force by lowering the slip property and the opening torque associated with the slip property required for opening the beverage bottle.

Conventionally, a carboxylic acid amide, which is a derivative of a carboxylic acid, is used as an additive to be mixed with a synthetic resin of a cap for a plastic beverage bottle. Carboxylic acid amides consist of a saturated carboxylic acid amide with no double bond in its chemical structure and an unsaturated carboxylic acid amide with a double bond in its chemical structure. When the unsaturated carboxylic acid amide is used as an additive to be mixed with the synthetic resin, the open torque is lowered or the sealing torque is increased than that of the saturated carboxylic acid amide. However, when the unsaturated carboxylic acid amide is present on the surface of the plastic beverage container or cap The unsaturated carboxylic acid amide binds with oxygen in the atmosphere to be oxidized and thus generates a bad odor.

Korean Patent Registration No. 10-0751223 discloses an invention in which a saturated carboxylic acid amide is used as an additive to improve the physical properties of a beverage bottle stopper. However, when only the saturated carboxylic acid amide is used as an additive for synthetic resin, it is not only problematic in that it is thermally resistant to the plastic beverage container or the stopper which is finally prepared but oxidized and bound to oxygen unlike the unsaturated carboxylic acid amide, The unsaturated carboxylic acid amide has a problem that the physical properties of the plastic beverage container or cap are not excellent.

The present invention provides a synthetic resin composition for a beverage bottle, which has improved sealability and slipperiness and is thus excellent in sealing properties, which can safely store beverages but is easy to open and has little odor.

The synthetic resin composition for a beverage bottle material according to the present invention comprises a polyolefin resin and an additive, wherein the additive is 0.06 part by weight or more and 1.55 parts by weight or less based on 100 parts by weight of the polyolefin, 0.01 to 0.3 parts by weight of a montanic acid derivative, 0.01 to 0.3 parts by weight of a polyolefin wax, 0.01 to 0.3 parts by weight of a fluorine resin, and 0.01 to 0.3 parts by weight of an alkanolamide.

The polyolefin resin may be one selected from ethylene vinyl acetate resin, polypropylene resin, and polyethylene resin having a molecular weight of 10,000 or more. The polypropylene resin is a Ziegler-Natta polypropylene resin obtained by polymerizing a propylene resin with a Ziegler-Natta catalyst, and the polyethylene resin is a Ziegler-Natta catalyst obtained by polymerizing an ethylene resin with a Ziegler- Lt; / RTI >

The polypropylene resin is a metallocene polypropylene resin obtained by polymerizing propylene resin with a metallocene catalyst. The polyethylene resin is a metallocene polyethylene resin obtained by polymerizing an ethylene resin with a metallocene catalyst. have.

The polyolefin resin is a polypropylene resin, and the additive to be mixed with the polypropylene resin may further include 0.01 to 0.3 parts by weight of dicarboxylic acid with respect to 100 parts by weight of the polypropylene. The carboxylic acid amide may include at least one selected from a saturated carboxylic acid amide and an unsaturated carboxylic acid amide. The montanic acid derivative may include at least one member selected from montanic acid ester and montanic acid amide.

The fluororesin may include at least one selected from the group consisting of a fluoroelastomer and a fluoropolymer. The alkanolamide may serve as an antistatic agent and may include lauric diethanol amide ), Coconut diethanol amide, stearic diethanol amide, oleic diethanol amide, and the like.

The synthetic resin composition for a beverage bottle according to the present invention comprises a polyolefin resin and an additive, and the additive has a content of at least 0.06 part by weight and no more than 1.55 parts by weight based on 100 parts by weight of the polyolefin. 0.01 to 0.3 parts by weight of a montanic acid derivative, 0.01 to 0.3 parts by weight of a polyolefin wax, 0.01 to 0.3 parts by weight of a fluororesin, and 0.01 to 0.3 parts by weight of an alkanolamide 0.01 to 0.3 parts by weight based on 100 parts by weight of the polyolefin, To 0.3 parts by weight, the sealing properties and the slip properties of the plastic beverage bottle caps and containers manufactured thereby are improved and the sealing property is excellent, so that the beverage can be safely stored and opened easily, and the plastic beverage bottle cap and container Since the content of the carboxylic acid amide on the surface is small and the problem of oxidation with oxygen is small, a stopper and a container for a plastic beverage bottle free from odor can be produced.

A polypropylene resin or a polyethylene resin having a molecular weight of 10000 or more is used as a polyolefin resin of a synthetic resin composition for a beverage bottle material, so that it can be used as a cork-shaped plastic beverage bottle stopper, a general plastic beverage bottle stopper or a container, It can be used as a material for drinks.

The polypropylene resin is a Ziegler-Natta polypropylene resin obtained by polymerizing a propylene resin with a Ziegler-Natta Catalyst, the polyethylene resin is a Ziegler-Natta polyethylene resin obtained by polymerizing an ethylene resin with a Ziegler-Natta catalyst, The polypropylene resin is a metallocene polypropylene resin obtained by polymerizing a propylene resin with a metallocene catalyst. The polyethylene resin is a metallocene polyethylene resin obtained by polymerizing an ethylene resin with a metallocene catalyst. In the case of a polyolefin The resin not only has a uniform structure of the polymer, but also has high resistance to external impact, and is excellent in flexibility and workability, so that a cap or a container for a plastic beverage bottle of uniform quality can be produced.

Wherein the polyolefin resin of the synthetic resin composition for beverage bottle material is a polypropylene resin, wherein the additive to be mixed with the polypropylene resin further comprises 0.01 to 0.3 parts by weight of dicarboxylic acid with respect to 100 parts by weight of the polypropylene polymer, Since the crystallization temperature of the synthetic resin composition for a beverage bottle material is lowered, the composition is uniformly hardened, so that a cap and a container for a plastic beverage bottle having a sophisticated shape and high rigidity can be manufactured.

The carboxylic acid amide of the synthetic resin composition for a beverage bottle material contains at least one selected from a saturated carboxylic acid amide and an unsaturated carboxylic acid amide to lower the open torque associated with the slip property, Or a bottle cap for a plastic beverage that the elderly can open the beverage with little force.

The montanic acid derivative of the synthetic resin composition for a beverage bottle material contains at least one selected from montanic acid ester and montanic acid amide, so that a plastic beverage bottle stopper which does not generate odor even if the beverage is stored for a long period while maintaining the slip property, And containers.

The polyolefin wax of the synthetic resin composition for beverage bottle material contains at least one selected from a polypropylene wax and a polyethylene wax having a molecular weight of less than 10000, thereby helping the additive and the polyolefin to be mixed uniformly, A plastic bottle cap and a container can be manufactured.

Since the fluororesin of the synthetic resin composition for a beverage bottle material contains at least one of a fluoro elastomer and a fluoropolymer, the sealing property and slip property are improved and the fluororesin serves as a polish agent, Plugs and containers can be manufactured.

The alkanolamide of the synthetic resin composition for beverage bottle material serves as an antistatic agent and contains at least one or more of lauric diethanolamide, coconut diethanolamide, stearic diethanolamide and oleic diethanolamide, In addition to providing a slippery property to the caps and containers for plastic beverage bottles manufactured by the antistatic agent to be migrated, it prevents the generation of static electricity, thereby preventing sticking of fine dust or germs at the time of distribution, Can be manufactured.

The present invention relates to a synthetic resin composition for a beverage bottle material in which a synthetic resin and an additive are mixed, and the synthetic resin composition according to the present invention can be used as a material for stoppers and containers for beverage bottles.

The synthetic resin composition according to the present invention comprises a polyolefin resin and an additive. The additive is contained in an amount of 0.06 parts by weight or more and 1.55 parts by weight or less based on 100 parts by weight of the polyolefin. 0.01 to 0.3 parts by weight of a montanic acid derivative, 0.01 to 0.3 parts by weight of a polyolefin wax, 0.01 to 0.3 parts by weight of a fluorine resin, and 0.01 to 0.3 parts by weight of an alkanolamide, based on 100 parts by weight of polyolefin, By weight.

The additive is mixed with the synthetic resin composition to improve physical properties such as sealability and slipperiness, and effects such as gloss and antistatic property can be given depending on the components of the additive. If the additive is contained in an amount less than 0.06 part by weight based on 100 parts by weight of the polyolefin, the additive is insufficient in the synthetic resin composition to improve the physical properties. If the additive is contained in excess of 1.55 parts by weight, There is a problem that the shape is not uniformly produced at the time of manufacturing.

The carboxylic acid amide, when mixed with the synthetic resin composition, imparts slip property to a synthetic resin molded article produced by this, that is, a stopper for a beverage bottle or a container. When the carboxylic acid amide is added in an amount less than 0.01 part by weight based on 100 parts by weight of the polyolefin, the slip property for opening the stopper for the beverage bottle is insufficient, and when it is added in an amount exceeding 0.05 part by weight, The cap for the plastic beverage bottle is easily opened even with a small force, but the carboxylic acid amide oxidizes and generates odor on the surface in contact with air.

The carboxylic acid amide includes at least one of a saturated carboxylic acid amide and an unsaturated carboxylic acid amide. Carboxylic acid amides are prepared by reacting carboxylic acids with ammonia or amines, and depending on the type of carboxylic acids, such as butyramide, caproamide, caprylamide, caprylamide caprate, capramide, lauramide, myristamide, palmitamide, stearamide, oleamide, arachidamide, behenic amide, but are not limited to, behenamide, erucacid, lignoceraide, cerotamide, melissamide, lacceroamide, geddamide, Hexatriacontylamide, and the like.

When a plastic beverage bottle cap is prepared from a composition of a mixture of a carboxylic acid amide and a polyolefin resin, the carboxylic acid amide serves to impart a slip property, which is a sliding property of a plastic beverage bottle cap to be produced. Also, when the carboxylic acid amide is mixed with the ethylene vinyl acetate resin, the cell size of the plug is made uniform in the foaming process to form the cork form used for the mainstream plug such as wine, and a hard and elastic main lid Can be manufactured.

The montanic acid derivatives give the slip properties of the plastic beverage bottle caps made by mixing with polyolefins like the carboxylic acid amides. When the montanic acid derivative is added in an amount of less than 0.01 part by weight, the slip property for opening the cap for a plastic drink bottle is insufficient. When the montanic acid derivative is added in an amount exceeding 0.3 part by weight, slip property is good but cost is not economical in terms of production cost.

The montanic acid derivative includes at least one member selected from a montanic acid ester and a montanic acid amide. When the montanic acid derivative is used as an additive together with the carboxylic acid amide, the slurry property is given to the synthetic resin composition, and the amount of the carboxylic acid amide oxidized by contact with air is reduced, thereby preventing the generation of odor.

The polyolefin wax has better flow than the polyolefin and is mixed with the additives so that the additives can be evenly mixed with the polyolefin. When the polyolefin wax is added in an amount of less than 0.01 part by weight based on 100 parts by weight of the polyolefin, the additive and the polyolefin are not mixed uniformly, and when the polyolefin wax is added in an amount of more than 0.3 part by weight, the total additive capacity is increased and the total specific gravity of the carboxylic acid amide is decreased, The slipperiness of the bottle cap can be reduced.

The polyolefin wax includes at least one selected from a polypropylene wax and a polyethylene wax having a molecular weight of less than 10,000. The polyolefin wax is a medium size component of low molecular weight polyolefin such as polyolefin and carboxylic acid amide. Addition of the polyolefin wax to the additive contributes to the uniform mixing of the polyolefin of the polymer and the additive component composed of the low molecular weight material.

The fluororesin not only improves the glossiness but also improves the slipping property like a carboxylic acid amide, so that a smooth plastic beverage bottle cap and container can be manufactured with a composition of a fluororesin mixed. When the amount of the fluororesin added is less than 0.01 part by weight based on 100 parts by weight of the polyolefin, the surface of the molded plastic beverage bottle stoppers and containers is rough, and when the added amount is more than 0.3 parts by weight, the surface gloss becomes uneven, And sticking occurs on the surface of the bottled plug and the container.

The fluororesin includes at least one selected from a fluoroelastomer and a fluoropolymer. The fluororesin can be used not only in gloss but also in slipperiness as a carboxylic acid amide to produce a smooth plastic beverage bottle cap and container with a composition containing a fluororesin mixed therein.

Alkanolamide is a kind of antistatic agent. When mixed with a synthetic resin composition, the alkanolamide prevents the generation of static electricity, which is caused by foreign matter such as dust or microorganisms sticking to the surface of a synthetic resin molded product, When the amount of the alkanolamide is less than 0.01 part by weight based on the weight of the polyolefin 100, the effect of the antistatic agent is very low. When the amount of the alkanolamide is more than 0.3 part by weight, the stopper of the beverage bottle or the whole of the carboxylic acid The specific gravity can be reduced and the slipperiness of the bottle cap or container can be reduced. Also, when an excessive amount of alkanolamide is added, a large amount of additive is transferred to the surface of the beverage bottle cap or the container, so that the shape is distorted when the beverage bottle cap or container is dyed.

The alkanolamide may be at least one selected from the group consisting of lauric diethanol amide, coconut diethanol amide, stearic diethanol amide, oleic diethanol amide, Includes more than species. Among the various antistatic agents, the alkanolamide has a very fast transition speed at which the additive moves from the synthetic resin composition to the surface than the other antistatic agent. Accordingly, when a beverage bottle container and a plastic beverage bottle cap are manufactured using a composition containing an alkanolamide, since the speed at which a shape of a beverage bottle cap or a container is formed is improved, mass production in a short time is possible, Or the container is prevented from generating static electricity, so that the sticking of fine dust or germs at the time of distribution can be inhibited, so that a sanitary stopper for a plastic beverage bottle and a container can be manufactured.

The polyolefin resin is selected from among ethylene vinyl acetate, polypropylene resin and polyethylene resin of a polymer having a molecular weight of 10,000 or more, which is safe for human body. Ethylene vinyl acetate resins are used to manufacture cork-shaped plastic beverage bottle caps for use in alcoholic beverages such as wines, and Ziegler-Natta polypropylene resins or metallocene polypropylene resins are used for general plastic beverage bottle caps and plastic beverage bottle caps , And Ziegler-Natta polyethylene resin or metallocene polyethylene resin can be used to manufacture a plastic beverage bottle cap.

The polypropylene resin may be a Ziegler-Natta polypropylene resin obtained by polymerization of a propylene resin with a Ziegler-Natta catalyst, or a metallocene polypropylene resin obtained by polymerization with a metallocene catalyst. The polyethylene resin may be a Ziegler-Natta polyethylene resin obtained by polymerization of ethylene with a Ziegler-Natta catalyst, or a metallocene polyethylene resin obtained by polymerization with a metallocene catalyst. When a polyolefin is polymerized with a Ziegler-Natta catalyst or a metallocene catalyst, the polyolefin resin is polymerized with a uniform structure of the polymer by a catalyst, so that a polymer resin composition having high resistance to external impact and excellent in flexibility and processability can be produced .

The polyolefin resin containing the additive is a polypropylene resin, and the additive to be mixed with the polypropylene resin may further include 0.01 to 0.3 parts by weight of dicarboxylic acid per 100 parts by weight of the polypropylene polymer. The dicarboxylic acid may include at least one member selected from the group consisting of pimelic acid and suberic acid.

Dicarboxylic acid is contained in the range of 0.01 to 0.3 parts by weight based on 100 parts by weight of the polypropylene 100. When the amount of the dicarboxylic acid is less than 0.01 part by weight, the production amount of calcium dicarboxylic acid is insufficient and the crystallization temperature of the polypropylene resin is high, If it is added in an excess amount, the total specific gravity of the carboxylic acid amide is reduced, and the slip property of the plastic drink bottle stopper can be reduced.

When a polypropylene resin mixed with dicarboxylic acid is processed at a high temperature, the dicarboxylic acid reacts with calcium dicarboxylic acid. The resulting calcium dicarboxylic acid will give the beta-nucleating agent performance of the polypropylene resin. The performance of the beta-nucleating agent is to add the nucleating agent performance to the polypropylene resin, which is capable of reducing electrons by reducing the beta-sites in the chemical structure of the polypropylene resin. Since the effect of lowering the crystallization temperature and increasing the rigidity of the synthetic resin composition in which the additive is mixed can be produced, a stopper and a container for beverage bottles having high resistance to external impact can be produced.

 The present invention can be understood more specifically by the following examples and comparative examples, and the following examples are only illustrative of the present invention and do not limit the scope of protection of the present invention.

The above-described synthetic resin composition for beverage bottle material of the present invention can be used both for compression molding and injection molding, which is a general plastic beverage bottle stopper manufacturing and molding method. The mixing ratios of the synthetic resin compositions in Examples and Comparative Examples are shown in Table 1 below. B2 is the weight of the montanic ester, B3 is the weight of the polypropylene wax, B4 is the weight of the polypropylene wax, B4 is the weight of the polypropylene wax, B5 is the weight of the fluoropolymer, B6 is the weight of the stearic diethanolamide, and B7 is the weight of the pimelic acid.

≪ Example 1 >

As shown in Table 1, in Example 1 of the present invention, a synthetic resin composition for beverage bottle material was prepared with the following composition. 0.03 part by weight of stearic acid amide, 0.15 part by weight of montanic ester, 0.15 part by weight of polypropylene wax, 0.15 part by weight of fluoropolymer, 0.15 part by weight of stearic diethanolamide, 0.15 part by weight of pimelic acid 0.15 part by weight, And the mixture was mixed with a Henschel mixer to prepare a synthetic resin composition.

In order to evaluate the synthetic resin composition of Example 1, the synthetic resin composition was put in an extruder and extruded at a processing temperature of 220 ° C to prepare a pellet according to the American Society for Testing and Materials (ASTM) standard. For the evaluation of the beverage bottle stopper or container, a plastic beverage bottle stopper was manufactured with the above-described synthetic resin composition of Example 1, and a plastic beverage bottle stopper was manufactured by using one compressor having 32 cavities of 28 mm size, , And a pump pressure of 45 bar.

≪ Example 2 >

As shown in Table 1, in Example 2 of the present invention, a synthetic resin composition for beverage bottle material was prepared with the following composition. 0.03 part by weight of stearic acid amide, 0.15 part by weight of montanic acid ester, 0.15 part by weight of polyethylene wax, 0.15 part by weight of fluoropolymer and 0.15 part by weight of stearic diethanolamide were added to the weight ratio of metallocene polyethylene powder 100 to 10 kg And mixed with a Henschel mixer to prepare a synthetic resin composition. The pellets for evaluating the synthetic resin composition and the plugs for plastic beverage bottles were prepared in the same manner as in Example 1 described above.

≪ Comparative Example 1 &

In Comparative Example 1, 10 kg of pure metallocene polypropylene powder without additives was used in the same manner as in Example 1 to prepare plugs for pellets and plastic beverage bottles.

≪ Comparative Examples 2 to 7 &

Comparative Example 2 was carried out in the same manner as in Example 1, except that the composition was not mixed with the pimelic acid. Comparative Example 3 was carried out in the same manner as in Example 1, except that stearic acid amide was not mixed at the composition ratio. Comparative Example 4 was carried out in the same manner as in Example 1, except that stearic acid amide was mixed at a ratio of 0.1 part by weight in the composition ratio. Comparative Example 5 was carried out in the same manner as in Example 1, except that the polypropylene wax was not mixed in the composition ratio. Comparative Example 6 was carried out in the same manner as in Example 1, except that the fluoropolymer was mixed in a proportion of 0.4 part by weight in the composition ratio. Comparative Example 7 was conducted in the same manner as in Example 1, except that the stearic diethanolamide was not mixed at the composition ratio.

≪ Comparative Example 8 >

In Comparative Example 8, pellets and plastic beverage bottle caps were prepared in the same manner as in Example 1, except that 10 kg of pure metallocene polyethylene powder without additives were mixed.

≪ Comparative Examples 9 to 14 >

Comparative Example 9 was carried out in the same manner as in Example 2, except that 0.15 part by weight of pimelic acid was mixed in the composition ratio. Comparative Example 10 was conducted in the same manner as in Example 2, except that stearic acid amide was not mixed at the composition ratio. Comparative Example 11 was carried out in the same manner as in Example 2, except that stearic acid amide was mixed at a ratio of 0.1 part by weight in the composition ratio. Comparative Example 12 was carried out in the same manner as in Example 2, except that the polypropylene wax was not mixed at the composition ratio. Comparative Example 13 was carried out in the same manner as in Example 2, except that the fluoropolymer was mixed in a proportion of 0.4 part by weight in the composition ratio. Comparative Example 14 was carried out in the same manner as in Example 2, except that the stearic diethanolamide was not mixed at the composition ratio.

division A1 A2 B1 B2 B3 B4 B5 B6 B7 Example 1 100 - 0.03 0.15 0.15 - 0.15 0.15 0.15 Example 2 - 100 0.03 0.15 - 0.15 0.15 0.15 - Comparative Example 1 100 - - - - - - - - Comparative Example 2 100 - 0.03 0.15 0.15 - 0.15 0.15 - Comparative Example 3 100 - - 0.15 0.15 - 0.15 0.15 0.15 Comparative Example 4 100 - 0.1 0.15 0.15 - 0.15 0.15 0.15 Comparative Example 5 100 - 0.03 0.15 - - 0.15 0.15 0.15 Comparative Example 6 100 - 0.03 0.15 0.15 - 0.4 0.15 0.15 Comparative Example 7 100 - 0.03 0.15 0.15 - 0.15 - 0.15 Comparative Example 8 - 100 - - - - - - - Comparative Example 9 - 100 0.03 0.15 0.15 0.15 - 0.15 0.15 Comparative Example 10 - 100 - 0.15 0.15 0.15 - 0.15 - Comparative Example 11 - 100 0.1 0.15 0.15 0.15 - 0.15 - Comparative Example 12 - 100 0.03 0.15 - 0.15 - 0.15 - Comparative Example 13 - 100 0.03 0.15 0.15 0.4 - 0.15 - Comparative Example 14 - 100 0.03 0.15 0.15 0.15 - - -

≪ Test Example 1 >

In Test Example 1, the synthetic resin compositions of Examples 1, 2, and Comparative Examples 1 to 14 were evaluated as follows and shown in Table 2.

(A) Melt index: The pellets prepared according to the ASTM standard were measured at 190 占 폚 under a load of 2.16 kg according to ASTM evaluation method D1238.

(B) Flexural modulus: The pellets prepared in accordance with the ASTM standard were measured at 25 DEG C and 50% relative humidity according to ASTM Evaluation Method D790.

(C) Crystallization temperature (T _c ): The temperature was measured at a rate of 10 ° C / min using a DSC (differential scanning calorimeter) apparatus.

division Melt Index
(g / 10 min) Flexural modulus
(kg.f / cm ² ) Crystallization temperature
(° C) Example 1 9.3 19,200 130.2 Example 2 9.2 18,900 115.2 Comparative Example 1 9.5 16,900 140.2 Comparative Example 2 8.2 17,200 142.5 Comparative Example 3 8.1 17,400 130.5 Comparative Example 4 8.8 18,500 131.2 Comparative Example 5 8.7 17,800 130.3 Comparative Example 6 8.6 18,700 130.2 Comparative Example 7 8.6 18,900 130.4 Comparative Example 8 9.5 16,800 115.3 Comparative Example 9 8.5 17,200 115.1 Comparative Example 10 8.4 17,100 115.2 Comparative Example 11 8.6 18,300 115.3 Comparative Example 12 8.7 17,000 115.3 Comparative Example 13 7.9 18,200 115.2 Comparative Example 14 8.3 17,900 115.1

As shown in Table 2, the melt indexes of Examples 1, 2, and Comparative Examples 1 to 14 were within the range of 5 to 10 g / 10 min, and the melt index of the synthetic resin composition The molded article is manufactured with the same physical properties and the same degree of hardness. When the melt index is less than 5 g / 10 min, the quality of the product may deteriorate due to the formation of a gel or a part of the container or a container of the beverage bottle when the beverage bottle stopper or the container is manufactured. If the melt index exceeds 10 g / 10 min, It may be difficult to manufacture a stopper or container.

As shown in Table 2, Comparative Example 1 with pure metallocene polypropylene without additive and Comparative Example 8 with pure metallocene polyethylene without additive had a flexural modulus higher than that of the other Examples and Comparative Examples Respectively. Here, the flexural modulus is a value that represents the rigidity of the manufactured fillet. When the flexural modulus is less than 16,000 kgf / cm ^2, the heat resistance and wear resistance of the molded article produced from each of the synthetic resin compositions may be deteriorated.

Generally, the crystallization temperature of the metallocene polypropylene is higher than the crystallization temperature of the metallocene polyethylene. As shown in Table 2, the crystallization temperature was lowered in Example 1 and Comparative Examples 3 to 7 in which pimelic acid was added, as compared with Comparative Example 1 in which pure metallocene polypropylene was used. Since the composition is uniformly hardened as the crystallization temperature is lower, the synthetic resin composition can produce a beverage bottle stopper or container having a sophisticated shape and high rigidity.

≪ Test Example 2 &

In Test Example 2, the stoppers or containers for beverage bottles of the synthetic resin compositions of Examples 1, 2, and Comparative Examples 1 to 14 were evaluated as follows and shown in Table 3.

(D) Sealing Torque: A plastic beverage bottle cap made of the synthetic resin compositions of each of the examples and the comparative examples was annealed at room temperature for 48 hours, and then a plastic beverage bottle container having an inlet shape fitted with a plastic beverage bottle stopper was filled with 20 lb / inch After 3, 15, and 30 days at room temperature, the torque value was measured using a torque meter.

(E) Opening Torque: A plastic beverage bottle cap made of the synthetic resin compositions of each of the examples and the comparative examples was annealed at room temperature for 48 hours, and then a plastic beverage bottle container fitted with a plastic beverage bottle cap was filled with 20 lb / inch After 3, 15, and 30 days at room temperature, the torque value was measured using a torque meter.

(F) Odor test: A plastic beverage bottle stopper made of the synthetic resin compositions of each of Examples and Comparative Examples was placed in a 4-L desiccator container and allowed to stand in an oven heated at 60 캜 for 3 hours. Thereafter, the test pieces were placed in a test container in which the outside air was cut off, and allowed to stand at room temperature for 1 hour. After cooling, the evaluator was evaluated by one person (no odor, no odor), medium odor (odor odor) Respectively. Five or more test containers were evaluated, and the results were averaged.

(G) Static Electricity Test: The static electricity was measured by a static electricity meter on the upper surface of a flat plastic beverage bottle cap which is easiest to generate static electricity in a plastic beverage bottle stopper made of the synthetic resin composition of each of Examples and Comparative Examples.

division Sealing torque (lb / in) Opening torque (lb / in) smell static
(kV) 3 days 15th 30 days 3 days 15th 30 days Example 1 57.2 55.5 54.4 10.2 11.3 12.5 Prize 0.5 Example 2 55.2 52.1 51.2 10.3 10.7 11.6 Prize 0.6 Comparative Example 1 45.2 40.2 39.1 12.3 12.9 13.1 Prize 1.6 Comparative Example 2 47.2 43.2 40.1 12.1 12.8 12.9 medium 0.7 Comparative Example 3 50.1 45.1 40.2 11.5 11.9 12.6 Prize 0.5 Comparative Example 4 54.2 51.2 49.2 10.3 11.2 11.9 Ha 0.7 Comparative Example 5 50.2 49.1 47.1 12.1 12.5 12.9 medium 0.6 Comparative Example 6 53.1 50.2 48.1 10.9 11.6 12.2 medium 0.6 Comparative Example 7 53.2 50.7 47.5 10.6 11.9 12.4 medium 1.4 Comparative Example 8 43.2 40.1 36.1 12.2 12.9 13.5 Prize 1.5 Comparative Example 9 47.1 42.1 37.1 11.9 12.8 13.3 medium 0.7 Comparative Example 10 50.1 47.6 41.2 12.1 12.8 13.4 Prize 0.5 Comparative Example 11 53.1 50.9 46.1 10.1 11.5 11.9 Ha 0.6 Comparative Example 12 50.1 47.3 41.2 12.1 12.7 13.9 medium 0.6 Comparative Example 13 53.2 50.2 47.8 10.9 11.8 12.6 medium 0.8 Comparative Example 14 53.3 51.1 50.2 11.5 12.2 13.1 medium 1.3

As shown in Table 3, Comparative Example 1 with pure metallocene polypropylene without additive and Comparative Example 8 with pure metallocene polyethylene with no additive were found to be similar to Examples 1, 2, and 3 The seal torque associated with the rigidity of the plastic beverage bottle cap was lower and the open torque associated with slip performance was lower than the comparative examples. The higher the sealing torque is, the better the sealing performance can be, the mixing of impurities can be prevented, and the storage stability of the contents is high.

When the sealing torque is less than 35 lb / in, the rigidity of the plastic beverage bottle cap is low, so it may be difficult to preserve the contents if pressure is generated inside the container sealed with a plastic beverage bottle cap, such as a carbonated beverage. The lower the opening torque, the easier it is to open the plastic beverage bottle cap. Opening torques above 15 lb / in may make it difficult for seniors and children to open the beverage, and if the open torque is less than 5 lb / in, there may be a problem with the contents storage. Therefore, as shown in Table 3, both the sealing torque and the opening torque of the first embodiment, the second embodiment, and the first to the fourth embodiments are closures for plastic beverage bottles, which are easy to store and open the contents, The plastic beverage bottle stoppers of Examples 1 and 2 having a high sealing torque and a low open torque were found to be easier to use.

As shown in Table 3, Comparative Example 4 and Comparative Example 11, in which the stearic acid amide was mixed in more than the range of the present invention, received the lower grade in the odor test. Therefore, when stearic acid amide is excessively mixed with the synthetic resin composition, oxidation occurs, resulting in a bad smell of the manufactured beverage bottle stopper or container.

As shown in Table 3, in the case of Comparative Example 1, Comparative Example 7, Comparative Example 8, and Comparative Example 14 in which stearic diethanolamide was not mixed with the synthetic resin composition, the static electricity generation value was 1.0 kV or more. If the static electricity generation value is 1.0 kV or more, it may cause hygienic problems because it is not harmful to human, but dust or microorganisms on the surface of the container or the container of the beverage bottle are easily attached.

Now, preferred embodiments, comparative examples and test examples of the present invention have been described. Although the present invention has been described in detail by way of Examples, Comparative Examples and Test Examples, it is not intended to limit the present invention, but merely to illustrate the present invention. Therefore, it will be apparent to those skilled in the art that the scope of the present invention is not limited by these embodiments in accordance with the gist of the present invention. The scope of the present invention is defined by the appended claims rather than by the foregoing description, and all differences within the scope of equivalents thereof should be construed as being included in the present invention.

Claims (10)

A synthetic resin composition for beverage bottle material,
Polyolefin resins; And
An additive,
The additive is contained in an amount of not less than 0.06 parts by weight and not more than 1.55 parts by weight based on 100 parts by weight of the polyolefin,
0.01 to 0.3 parts by weight of a montanic acid derivative, 0.01 to 0.3 parts by weight of a polyolefin wax, 0.01 to 0.3 parts by weight of a fluororesin, and 0.01 to 0.3 parts by weight of an alkanolamide 0.01 to 0.3 parts by weight based on 100 parts by weight of the polyolefin, To 0.3 parts by weight,
Wherein the montanic acid derivative includes at least one or more selected from a montanic acid ester and a montanic amide to give the synthetic resin composition together with the carboxylic acid amide a slip property which is a sliding property of the synthetic resin composition Synthetic resin composition for bottle material. The method according to claim 1,
Wherein the polyolefin resin is one selected from ethylene vinyl acetate resin, polypropylene resin, and polyethylene resin having a molecular weight of 10,000 or more. 3. The method of claim 2,
The polypropylene resin is a Ziegler-Natta polypropylene resin obtained by polymerizing a propylene resin with a Ziegler-Natta catalyst,
Wherein the polyethylene resin is a Ziegler-Natta polyethylene resin obtained by polymerizing an ethylene resin with a Ziegler-Natta catalyst. 3. The method of claim 2,
The polypropylene resin is a metallocene polypropylene resin obtained by polymerizing a propylene resin with a metallocene catalyst (Metallocene Catalyst)
Wherein the polyethylene resin is a metallocene polyethylene resin obtained by polymerizing an ethylene resin with a metallocene catalyst. 3. The method of claim 2,
Wherein the polyolefin resin is a polypropylene resin,
Wherein the additive to be mixed with the polypropylene resin further comprises 0.01 to 0.3 parts by weight of dicarboxylic acid with respect to 100 parts by weight of the polypropylene. The method according to claim 1,
Wherein the carboxylic acid amide includes at least one selected from a saturated carboxylic acid amide and an unsaturated carboxylic acid amide. delete The method according to claim 1,
Wherein the polyolefin wax comprises at least one selected from polypropylene and polyethylene having a molecular weight of less than 10,000. The method according to claim 1,
Wherein the fluororesin comprises at least one selected from the group consisting of a fluoroelastomer and a fluoropolymer. The method according to claim 1,
The alkanolamide may serve as an antistatic agent and may be selected from the group consisting of lauric diethanol amide, coconut diethanol amide, stearic diethanol amide, oleic diethanol amide, diethanol amide). < RTI ID = 0.0 > 11. < / RTI >