KR20160116454A - Packing Case SheetT for Bean Curd and Its Production Method - Google Patents
Packing Case SheetT for Bean Curd and Its Production Method Download PDFInfo
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- KR20160116454A KR20160116454A KR1020150044187A KR20150044187A KR20160116454A KR 20160116454 A KR20160116454 A KR 20160116454A KR 1020150044187 A KR1020150044187 A KR 1020150044187A KR 20150044187 A KR20150044187 A KR 20150044187A KR 20160116454 A KR20160116454 A KR 20160116454A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/10—Homopolymers or copolymers of propene
- C08L23/12—Polypropene
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D65/00—Wrappers or flexible covers; Packaging materials of special type or form
- B65D65/38—Packaging materials of special type or form
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/0008—Organic ingredients according to more than one of the "one dot" groups of C08K5/01 - C08K5/59
- C08K5/005—Stabilisers against oxidation, heat, light, ozone
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G2390/00—Containers
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Wrappers (AREA)
Abstract
Description
The present invention relates to a front sheet packaging container sheet and a method of manufacturing the same, and more particularly, to a front sheet packaging container sheet and a method of manufacturing the same, By manufacturing the packaging container sheet, the storage period of the front head portion solidified in the packaging container is extended, and when the front container portion is separated from the packaging container, the front portion can be smoothly separated without adhering to the container surface, The present invention relates to a frontal sheet packaging container sheet and a method of manufacturing the same.
Generally, since the frontal part is made whole soybeans, it can keep 100% of fiber and essential amino acid contained in soybean, and it is a processed food which is consumed as a nutritional source such as a child in growth period or a person with insufficient digestive capacity.
However, the containers used to pack the frontal part have a problem in that when the packaging container is expanded due to the high temperature of the frontal part packed in the packaging container and when the frontal part is separated from the packaging container due to the adhesion with the coagulated frontal surface, There is a problem that the surface is stuck to the packaging container to degrade the external value of the frontal part.
Patent Document 10-1335228 discloses that 25 to 65% by weight of polypropylene, 10 to 40% by weight of high-density polyethylene and 10 to 35% by weight of low-density polyethylene are contained in Patent Application No. 10-1335228, 100 weight parts of a poly-based synthetic resin containing weight%; 15 to 40 parts by weight of a release agent obtained by mixing 70 to 95% by weight of low-density polyethylene and 5 to 30% by weight of an animal fat and melting at a temperature of 180 to 230 캜; 10 to 30 parts by weight of vegetable palm glycerin; And 1 to 5 parts by weight of a colorant are mixed and then introduced into an extruder, and the resulting pellets are heated and extruded at 200 to 270 ° C .; a sheet for a front packager is known, 1006557, and a surface layer laminated on one surface or both surfaces of the base layer, wherein the surface layer is composed of 75 to 85% by weight of an olefin resin, silica, talc, calcium carbonate, titanium dioxide glass 10 to 22% by weight of at least one inorganic particle selected from among fibers, maca, silica, grasses, chalk and wollastonite and PE wax, PP wax, PTFE, PTFE / PE wax, 3 to 15% by weight of at least one slip selected from carnauba wax and glycerin. Pingye is known yijipil embossed sheet.
However, as a result of research and development based on a polypropylene resin composed of a propylene polymer having a high melting point and a propylene /? - olefin random copolymer having a low melting point, unlike the above- The surface of the front container is smooth, and the shelf life can be prolonged as compared with the prior art.
In order to achieve the above-mentioned object, the present invention provides a sheet made by adding a slip agent, a nucleating agent and the like to a polypropylene resin composed of a propylene polymer having a high melting point and a propylene /? - olefin random copolymer having a low melting point, It is possible to easily separate the front head portion from the packaging container by lowering the adhesion of the front surface of the front portion and the packaging container when separating the front head portion from the packaging container and to protect the packaging container from ultraviolet rays, And a method of manufacturing the same.
In addition, the present invention can improve the value of the frontal part and improve the texture of the consumer by separating the frontal part, which is solidified in the packaging container, while preventing the frontal part from being damaged, And a manufacturing method thereof.
In order to solve the above problems, the present invention provides a resin composition comprising 2 to 5 parts by weight of slip, 1 to 2 parts by weight of a UV stabilizer, 0.1 to 0.5 parts by weight of a nucleating agent, and 0.1 to 0.5 parts by weight of a lubricant based on 100 parts by weight of a polypropylene resin Is produced by heating and extrusion molding.
The polypropylene resin contains 80 to 90% by mass of a propylene polymer having a melting point (Tm) of 150 to 170 ° C and 10 to 20% by mass of a propylene /? - olefin random copolymer having a melting point (Tm) of 70 to 85 ° C or less Wherein the slip agent comprises at least one selected from the group consisting of silicone acrylate and fluoroacrylate, and the UV stabilizer is at least one selected from the group consisting of benzotriazole-based, benzilidene-hardened, benzophenone-based, benzoguanine- As shown in FIG.
Also, the nucleating agent comprises one selected from the group consisting of dibenzylidene sorbitol, dimethylbenzylidene sorbitol, bisethylbenzylidene sorbitol, and 3,4-dimethylbenzylidene sorbitol. The lubricant includes calcium-stearate (Ca- stearate, magnesium stearate, and zinc stearate. The present invention also provides a method for producing the same.
The present invention also provides a method of manufacturing a frontal sheet packing sheet,
1) 80 to 99% by weight of a propylene polymer having a melting point (Tm) of 150 to 170 ° C and 1 to 20% by weight of a propylene /? - olefin random copolymer copolymer having a melting point (Tm) Melting at 200 ° C to produce a pellet-shaped polypropylene resin;
2) 3 to 7 parts by weight of slip, 1 to 2 parts by weight of a UV stabilizer, 0.1 to 0.5 parts by weight of a nucleating agent and 0.1 to 0.5 parts by weight of a lubricant are mixed with 100 parts by weight of the polypropylene resin produced in the step 1) Melting at 230 占 폚 and producing a pellet-shaped frontal packing resin by an extruder;
3) preparing a front sheet packing sheet by heating and extruding the above-mentioned front head packing resin at 200 to 230 ° C;
4) Cooling and packing the frontal sheet for wrapping in the above step.
The frontal sheet packaging container sheet and the manufacturing method thereof according to the present invention having the above-described structure can be applied to a polypropylene resin composed of a propylene polymer having a high melting point and a propylene /? - olefin random copolymer having a low melting point and a slip agent, a UV stabilizer, It is possible to easily separate the front head portion from the packaging container while preventing the front head portion from being damaged due to the deterioration of the adhesion between the surface of the front head portion and the packaging container, It can enhance the texture of consumers and also protects the forehead from ultraviolet rays, so that the storage period can be extended.
In order to achieve the above-mentioned effects, the present invention relates to a front-end packaging container sheet, wherein only parts necessary for understanding the present invention are described, and other descriptions will be omitted within the scope of the present invention Be careful.
The present invention relates to a resin composition comprising a resin comprising 2 to 5 parts by weight of slip, 1 to 2 parts by weight of a UV stabilizer, 0.1 to 0.5 parts by weight of a nucleating agent and 0.1 to 0.5 parts by weight of a lubricant based on 100 parts by weight of a polypropylene resin The present invention relates to a frontal sheet packaging container sheet,
In the present invention, the polypropylene resin is excellent in optical properties such as tensile strength, surface hardness and impact strength, optical properties such as gloss and transparency, and food hygiene, and is a propylene polymer having a melting point (Tm) And 10 to 20 parts by weight of a propylene /? - olefin random copolymer having a weight part and a melting point (Tm) of 70 to 85 占 폚.
The propylene polymer is preferably composed of a propylene homopolymer having excellent moldability, heat resistance and transparency. The amount of the propylene polymer to be used is preferably 80 to 90 parts by weight of the propylene polymer per 100 parts by weight of the polypropylene resin. When the mixing amount of the propylene polymer is less than 80 parts by weight, the moldability, heat resistance and transparency of the packaging container sheet may deteriorate. When the mixing amount of the propylene polymer exceeds 90 parts by weight, heat resistance and transparency are excellent. There is a possibility that the moldability is lowered due to the decrease in the amount of addition.
The random propylene /? - olefin random copolymer is a propylene /? - olefin random copolymer containing a propylene constituent unit and an? -Olefin constituent unit and is excellent in flowability and moldability. The amount thereof is preferably 100 parts by weight And 10 to 20 parts by weight of the propylene /? - olefin random copolymer. If the mixing amount of the propylene /? - olefin random copolymer is less than 10 parts by weight, the fluidity and moldability of the packaging container sheet may deteriorate. When the mixing amount of the propylene /? - olefin random copolymer exceeds 20 parts by weight The flowability and moldability of the packaging container sheet can be improved, but the heat resistance, transparency and the like may be deteriorated due to the decrease in the addition amount of the other mixture.
In the present invention, the slip agent is an auxiliary additive for allowing the filled tofu to slide smoothly from the packaging container sheet to prevent the tofu packed in the packaging container from sticking to the surface of the packaging container when solidified, It is preferably 2 to 5 parts by weight based on 100 parts by weight. If the amount of the slip agent used is less than 2 parts by weight, the tofu solidified on the surface of the packaging container may stick to the surface of the packaging container due to the decrease in the amount of the slip agent used. If the amount of the slip agent used exceeds 5 parts by weight, It is possible to prevent sticking of the tofu solidified on the surface of the packaging container, but its effect is weak compared to the amount of use.
As the slip agent, it is preferable to select one of silicone acrylate and fluoroacrylate.
In the present invention, the ultraviolet stabilizer is added in order to block ultraviolet rays absorbed in the front packaging container. The ultraviolet stabilizer has an absorption wavelength range of 260 to 400 nm, and is required to have high safety, high ultraviolet protection property and excellent thermal stability, It is preferably 1 to 2 parts by weight based on 100 parts by weight of the propylene resin. When the amount of the ultraviolet stabilizer is less than 1 part by weight, it is difficult to completely block ultraviolet rays absorbed in the front packaging container. When the amount of the ultraviolet stabilizer is more than 2 parts by weight, ultraviolet rays absorbed in the front packaging container can be completely blocked There is a possibility that the surface of the front packaging container becomes turbid.
The ultraviolet stabilizer may be at least one selected from the group consisting of benzotriazole-based, benzylidene-hendane-based, benzophenone based (e.g., 2,4-dihydroxybenzophenone), benzoguanine based salicylic acid based, acrylonitrile based, Two or more species can be selected and used.
In the present invention, the nucleating agent serves to accelerate the crystallization speed of the polypropylene resin, increase the crystallization speed by increasing the crystallization speed, and improve mechanical properties. The amount of the nucleating agent to be used is 0.1 to 0.5 parts by weight per 100 parts by weight of the polypropylene resin . When the amount of the nucleating agent used is less than 0.1 part by weight, it is difficult to promote the crystallization speed of the polypropylene resin. When the amount of the nucleating agent is more than 0.5 part by weight, the effect of promoting the crystallization speed of the polypropylene resin is not further developed .
The nucleating agent is not particularly limited and a suitable nucleating agent may be selected and used according to need. Preferably, a metal salt selected from the group consisting of an aluminum salt, a calcium salt and a sodium salt may be used, Butyl benzoic acid, sodium benzoic acid, and calcium benzoic acid.
In the present invention, the lubricant is used for promoting fluidity and slippage by reducing mechanical friction when molding the front-end packaging container, and it is preferably used in an amount of 0.1 to 0.5 parts by weight based on 100 parts by weight of the polypropylene resin. When the amount of the lubricant used is less than 0.1 part by weight, there is a possibility that mechanical friction is not reduced as required when molding the front packaging container. When the amount of the lubricant used is more than 0.5 part by weight, The flowability and slip can be promoted, but the effect thereof is weak compared to the amount used.
The lubricant may be selected from Ca-stearate, Mg-stearate and Znstearate. The lubricant may be selected from the group consisting of Ca-stearate, Mg-stearate and Znstearate.
The method of manufacturing the frontal sheet packaging container sheet according to the present invention will be described in detail as follows.
The present invention relates to a method for manufacturing a sheet for frontal packing,
1) 80 to 90% by weight of a propylene polymer having a melting point (Tm) of 150 to 170 ° C and 10 to 20% by weight of a propylene /? - olefin random copolymer copolymer having a melting point (Tm) Melting at 200 ° C to produce a pellet-shaped polypropylene resin;
2) 2 to 5 parts by weight of slip, 1 to 2 parts by weight of a UV stabilizer, 0.1 to 0.5 parts by weight of a nucleating agent and 0.1 to 0.5 parts by weight of a lubricant are mixed with 100 parts by weight of the polypropylene resin prepared in the above step, Melting the pellet-shaped front-end packaging resin with an extruder;
3) preparing a frontal sheet for packaging by heating and extruding the frontal part packaging resin produced at the above step at 200 to 230 ° C;
4) Cooling and packaging the frontal sheet wrapping sheet produced in the above step.
In step 1), 80 to 90% by weight of a propylene polymer having a melting point (Tm) of 150 to 170 ° C and 10 to 20% by weight of a propylene /? - olefin random copolymer having a melting point (Tm) Melting polypropylene resin at a temperature of 200 ° C to produce a pellet-shaped polypropylene resin. When the melting temperature is lower than 180 ° C, there is a possibility that the mixture is not completely melted due to a low melting temperature. When the melting temperature exceeds 200 ° C , The mixture can be completely melted when producing the polypropylene resin, but the effect is no longer expressed.
On the other hand, the pellet-shaped polypropylene resin thus produced is cooled by a conveyor belt through a cooling tunnel at 20 to 25 ° C. If the cooling temperature is less than 20 ° C, the pellets may not be uniform due to rapid cooling of the pellets. If the cooling temperature exceeds 25 ° C, the pellets may not be completely cooled and the pellets may become entangled with each other . Specific details of the components used as the mixture of the polypropylene resin have already been described in detail in the foregoing, and therefore, a detailed description thereof will be omitted here.
Although the size of the pellet is not particularly limited, it is preferable that the size of the pellet is 1 to 3 mm.
In step 2), 2 to 5 parts by weight of slip, 1 to 2 parts by weight of a UV stabilizer, 0.1 to 0.5 parts by weight of a nucleating agent and 0.1 to 0.5 parts by weight of a lubricant are mixed with 100 parts by weight of the polypropylene resin, And melting the mixture at 230 ° C to produce a pellet-shaped front-end packaging resin using an extruder. When the melting temperature is below the above-mentioned range, the mixture introduced into the mixer is not completely melted and thus it is difficult to produce uniform pellets. When the above conditions are exceeded, the mixture introduced into the mixer is completely melted to produce uniform pellets, but no further special effect is produced compared to the energy consumption.
Meanwhile, the pellet-shaped front-end packaging resin prepared above is cooled by a conveyor belt through a cooling tunnel at 20 to 25 ° C. If the cooling temperature is less than 20 ° C, the pellets may not be uniform due to rapid cooling of the pellets. If the cooling temperature exceeds 25 ° C, the pellets may not be completely cooled and the pellets may become entangled with each other . Specific details of the components used as the mixture have already been described in detail above, and therefore, a detailed description thereof will be omitted.
The step 3) is a step of preparing the frontal packing sheet by heating and extruding the frontal part packaging resin prepared above at 200 to 230 ° C. If the melting temperature is lower than the above-mentioned condition, the mixture introduced into the mixer is not completely melted It is difficult to produce uniform pellets. If the melting temperature exceeds the above-mentioned range, the mixture introduced into the mixer is completely dissolved to produce uniform pellets, but no further special effect is produced compared with the energy consumption.
The step 4) is a step of cooling and sealing the frontal sheet wrapping sheet manufactured at 20 to 25 캜, wherein the frontal packing sheet produced by extrusion molding in the step 3) Lt; [deg.] ≫ C, and then packed in a roll form. If the cooling temperature is lower than the above-mentioned condition, the surface of the sheet may not be uniform due to rapid cooling, and if the cooling temperature exceeds the above-mentioned condition, the sheet surface may not be completely cooled.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the following examples. However, the present invention is not limited to the following examples.
(Example 1)
1) 80% by weight of a propylene polymer having a melting point (Tm) of 160 占 폚 of 3 占 폚 and 20% by weight of a propylene 占--olefin random copolymer having a melting point (Tm) of 75 占 폚 were mixed and melted at 190 占 폚 Propylene resin was extruded to produce pellets having a thickness of 2 mm.
2) 3 parts by weight of silicone acrylate as a slip agent, 2 parts by weight of 2,4-dihydroxybenzophenone as an ultraviolet stabilizer, 0.1 part by weight of dimethylbenzylidene sorbitol as a nucleating agent, And 0.5 parts by weight of calcium stearate as a lubricant were mixed and melted at 220 +/- 2 DEG C to prepare a pellet-shaped frontal packing resin with an extruder.
3) The pellet prepared above was heated to 220 ± 2 ° C and extruded, and the sheet was cooled with a cooling roller at 22 ° C to prepare a 0.5mm thick frontal sheet for packaging.
(Example 2)
1) To 100 parts by weight of the polypropylene resin prepared in Example 1, 5 parts by weight of silicone acrylate as a slip agent, 1 part by weight of 2,4-dihydroxybenzophenone as an ultraviolet stabilizer, and 1 part by weight of dimethylbenzylidene sorbitol And 0.1 part by weight of calcium-stearate as a lubricant were melted at 220 占 2 占 폚, and a pellet-shaped frontal packing resin was produced by an extruder.
2) The pellet produced above was heated to 220 ± 2 ° C, and the extruded sheet was cooled with a cooling roller at 22 ° C to prepare a 0.5 mm frontal sheet for packaging.
(Example 3)
1) To 100 parts by weight of the polypropylene resin prepared in Example 1, 5 parts by weight of silicone acrylate as a slip agent, 1.5 parts by weight of 2,4-dihydroxybenzophenone as an ultraviolet stabilizer, 1.5 parts by weight of dimethylbenzylidene sorbitol And 0.2 part by weight of calcium stearate as a lubricant were melted at 220 占 2 占 폚, and a pellet-shaped front-end packaging resin was produced by an extruder.
2) The pellet produced above was heated to 220 ± 2 ° C, and the extruded sheet was cooled with a cooling roller at 22 ° C to prepare a 0.5 mm frontal sheet for packaging.
(Comparative Example 1)
1) 1 part by weight of silicone acrylate as a slip agent, 0.1 part by weight of dimethylbenzylidene sorbitol as a nucleating agent and 1.0 part by weight of calcium stearate as a lubricant were mixed with 100 parts by weight of the polypropylene resin prepared in Example 1 to obtain 220 And melted at 占 2 占 폚 to prepare a pellet-shaped frontal packing resin with an extruder.
2) The pellet produced above was heated to 220 ± 2 ° C, and the extruded sheet was cooled with a cooling roller at 22 ° C to prepare a 0.5 mm frontal sheet for packaging.
(Comparative Example 2)
1) To 100 parts by weight of the polypropylene resin prepared in Example 1, 10 parts by weight of silicone acrylate as a slip agent, 5 parts by weight of 2,4-dihydroxybenzophenone as an ultraviolet stabilizer, 0.1 part by weight of calcium-stearate 0.1 And melted at 220 +/- 2 DEG C to prepare a pellet-shaped front-end packaging resin with an extruder.
2) The pellet produced above was heated to 220 ± 2 ° C, and the extruded sheet was cooled with a cooling roller at 22 ° C to prepare a 0.5 mm frontal sheet for packaging.
The vacuum molding, the residual rate and the load deflection temperature of the frontal sheet wrapping sheets prepared in Examples 1 to 3 and Comparative Examples 1 and 2 were evaluated according to the following methods.
1) Vacuum molding was carried out by using a vacuum molding machine equipped with a mold having a size of 10 cm × 5 cm and a depth of 3 cm and a preheating heater temperature of 230 ° C., a preheating time of 15 seconds, a mold temperature of 20 ° C., Sec, and vacuum formability (softened state) was evaluated according to the following criteria.
○: The surface of the packaging container is clean and smooth.
△: The surface of the packaging container is clean, but the smoothness is slightly irregular.
X: The surface of the packaging container has unevenness and irregularity in smoothness.
2) The residual percentage of the head of the packaging container was evaluated according to the following criteria when filling the front part of the vacuum container with the front part and then sealing the front part from the packaging container after 24 hours.
◎: There is no front head sticking to the packaging container.
○: There is a sign that the front part of the packaging container is slightly stuck.
?: Part of the packaging container is stuck to the forehead part in the form of granules.
X: The front head is stuck on the first half of the packaging container.
3) Load refraction temperature: The load-deflection temperature was measured at a load of 0.45 MPa according to ASTM D648 using a specimen having a size of 100 mm x 20 mm and a thickness of 0.5 mm in a front sheet package sheet obtained by vacuum molding.
According to the above Table 1, in the case of Examples 1 to 3, since the mixture of the front-end packaging container was added within the range required by the present invention, the surface of the packaging container was evaluated to be clean and smooth in vacuum formability, In the case of Comparative Example 1, the addition amount of the slip agent was small and the addition amount of the nucleating agent was excessively increased in the case of the surface of the packaging container in the case of Comparative Example 1, Had a slight irregularity in smoothness, and there was a sign that the frontal part was attached to the surface finely, and the heat resistance due to the load refraction temperature was evaluated to be slightly lower. In the case of Comparative Example 2, since the slip agent is added in an excessive amount and the synthetic resin is not added, the surface of the packaging container is slightly irregular in smoothness, the frontal portion is stuck in a granular form on a part of the surface, Was also estimated to be slightly lower.
As described above, the frontal sheet packaging container sheet and the manufacturing method thereof according to the present invention are explained through the preferred embodiments and the superiority thereof is confirmed. However, those skilled in the art will appreciate that the above- It will be understood that various modifications and changes may be made thereto without departing from the spirit and scope of the invention.
Claims (11)
Wherein the polypropylene resin comprises 80 to 90% by mass of a propylene polymer having a melting point (Tm) of 150 to 170 캜 and 10 to 20% by mass of a propylene /? - olefin random copolymer copolymer having a melting point (Tm) Wherein the front and rear packaging sheets are made of the same material.
Wherein the slip agent comprises at least one selected from the group consisting of silicone acrylate and fluoroacrylate.
Wherein the ultraviolet light stabilizer comprises at least one selected from the group consisting of benzotriazole-based, benzylidene-hendane-based, benzophenone-based, benzoguanine-based, and the like.
Wherein the nucleating agent comprises one selected from the group consisting of dibenzylidene sorbitol, dimethylbenzylidene sorbitol, bisethylbenzylidene sorbitol, and 3,4-dimethylbenzylidene sorbitol.
Wherein the lubricant comprises at least one selected from the group consisting of Ca-stearate, Mg-stearate and Znstearate. .
1) 80 to 99% by weight of a propylene polymer having a melting point (Tm) of 150 to 170 ° C and 1 to 20% by weight of a propylene /? - olefin random copolymer copolymer having a melting point (Tm) Melting at 200 ° C to produce a pellet-shaped polypropylene resin;
2) 3 to 7 parts by weight of slip, 1 to 2 parts by weight of a UV stabilizer, 0.1 to 0.5 parts by weight of a nucleating agent and 0.1 to 0.5 parts by weight of a lubricant are mixed with 100 parts by weight of the polypropylene resin produced in the step 1) Melting at 230 占 폚 and producing a pellet-shaped frontal packing resin by an extruder;
3) preparing a front sheet packing sheet by heating and extruding the above-mentioned front head packing resin at 200 to 230 ° C;
4) Cooling and packing the frontal sheet for packaging in the above step.
Wherein the slip agent is selected from the group consisting of silicone acrylate and fluoroacrylate.
Wherein said ultraviolet light stabilizer comprises at least one selected from the group consisting of benzotriazole-based, benzilidene-hardened, benzophenone-based, benzoguanine-based, and the like.
Wherein the nucleating agent comprises at least one selected from the group consisting of dibenzylidene sorbitol, dimethylbenzylidene sorbitol, bisethylbenzylidene sorbitol, and 3,4-dimethylbenzylidene sorbitol.
Wherein the lubricant comprises at least one selected from the group consisting of Ca-stearate, Mg-stearate and Znstearate. ≪ / RTI >
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| KR1020150044187A KR101672925B1 (en) | 2015-03-30 | 2015-03-30 | Packing Case SheetT for Bean Curd and Its Production Method |
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| KR1020150044187A KR101672925B1 (en) | 2015-03-30 | 2015-03-30 | Packing Case SheetT for Bean Curd and Its Production Method |
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| KR20040065079A (en) * | 2003-01-15 | 2004-07-21 | 삼성아토피나주식회사 | Polypropylene Resin Composition having Great Resistance to High Pressure, Impact Strength, and Transparency for Automotive applications |
| JP5255433B2 (en) * | 2006-03-17 | 2013-08-07 | 三井化学株式会社 | Polypropylene resin composition, molded body, sheet, and container |
| KR20100043722A (en) * | 2008-10-21 | 2010-04-29 | 삼성토탈 주식회사 | Polyprophylene resin composition having improved discoloration-resistance and antibiosis |
| KR20120057976A (en) * | 2010-11-29 | 2012-06-07 | 현대제철 주식회사 | High thermal conductive resin composite, fabrication method of the same and product using the same |
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