KR20120129778A - Plastic goods including plant fatty acid and the manufacturing method thereof - Google Patents

Abstract

PURPOSE: A plastic product is provided to improve strength, elongation, etc and to have excellent sterilization and elasticity, and to be used as a film for packing food material, a food storage container, various bottles, etc. CONSTITUTION: A manufacturing method of a plastic product comprises a step of molding through a normal method by impregnating 0.1-10.0 weight% of vegetable aliphatic acid into a synthetic resin. A method of impregnating vegetable aliphatic acid into a synthetic resin is that coating synthetic resin chips with a vegetable aliphatic acid before molding. The vegetable aliphatic acid comprises one or more selected from linoleic acid, oleic acid, stearic acid, palmitic acid, licanic acid, and ricinol acid. [Reference numerals] (AA) Normal polyester film

Description

Plastic goods including plant fatty acid and manufacturing method thereof

The present invention relates to a plastic product containing a vegetable fatty acid and a method of manufacturing the same, and more particularly, to a vegetable fatty acid having excellent physical properties such as strength, elongation, elasticity, and remarkably improved appearance characteristics, glossiness, antimicrobial activity, productivity, and the like. It relates to a plastic product containing and a method for producing the same.

    In the case of packaging films or food containers for food materials, it is necessary to provide antimicrobial properties in order to prevent food from being altered by microorganisms. For this reason, various kinds of antimicrobial films or plastic products have been developed, the main one is the addition of inorganic antimicrobials.

Recently, however, since the harmfulness of the inorganic antimicrobial may be a problem, technologies using natural antimicrobials have begun to be developed. In Korean Patent No. 10-0957077, wasabi extract was used as an antimicrobial agent to form an antimicrobial layer between or on one side of the wrapping film layer.

Korean Patent No. 10-1046957 used ginseng extract as a natural antimicrobial agent, and Korean Patent No. 10-0941800 used purslane extract as a natural antimicrobial agent.

Although all of the above techniques exhibit excellent antimicrobial effects, natural antimicrobial agents are too expensive and have poor physical properties.

It is an object of the present invention to provide a plastic product with remarkably improved physical properties such as strength and elongation. Another object of the present invention is to provide a plastic product having high productivity. Another object of the present invention is to provide a plastic product having antibacterial properties. Another object of the present invention is to provide a plastic product having excellent elasticity.

      The plastic product of the present invention is characterized by containing 0.1 to 10.0% by weight of plant fatty acids. The production method of the present invention consists of molding 0.1 to 10.0% by weight of plant fatty acid in a synthetic resin.

Hereinafter, the present invention will be described in detail.

      The vegetable fatty acids used in the present invention are linseed oil, sunflower seed oil, rapeseed oil, camellia oil, castor oil, etc., linoleic acid, oleic acid, stearic acid, It is a fatty acid that mainly contains ingredients such as palmitic acid, licanic acid, ricinol acid, and linolenic acid.

For flaxseed oil, its components are listed in Table 1 below.

ingredient Content (g / 100g Fatty Acid)  Remarks Myristic acid 0.04021 Pentadecanoic acid 0.02228 Palmitic acid 5.27593 Palmitoleic acid 0.05897 Margaric acid 0.06364 Heptadecenoic acid 0.04187 Stearic acid 3.47834 Oleic acid 18.56481 Linoleic acid 15.39735 Linolenic acid 56.41282 Arachidic acid 0.14637 Gadoleic acid 0.13117 Eicosadienoic acid 0.04389 Eicosadienoic acid 0.02286 Heneicosanoic acid 0.04995 Behenic acid 0.12625 Erucic acid 0.01942 Lionaceric acid 0.10388

      When the additive is added to the plastic synthetic resin, the physical properties such as strength and elongation are generally lowered. Since the physical properties of the plastic product of the present invention are further improved than those of ordinary synthetic fibers, the components are considered to have a chemical bond with the synthetic resin. .

The method of incorporating the plant fatty acid into the plastic product polymer material includes (i) forming a chip obtained by coating the plant fatty acid on a synthetic chip and drying the resin chip in a conventional manner or preparing a masterbatch chip; and (ii) To form a master batch chip, and then mixing the master batch chip alone or with a general plastic synthetic resin chip and molding it in a conventional manner, (iii) adding a plant fatty acid into the melting zone of the extruder before molding, (iv The method of adding a plant fatty acid in a polymerization process, etc. are mentioned.

In the method of (i), that is, the method of coating the plant fatty acid on the synthetic resin chip, the drying method is preferably using a rotary hot air dryer or a high frequency dryer. This is because the thermal degradation of plant fatty acids in the drying process can be minimized.

In the methods (i) and (ii), water and emulsifiers may be added and emulsified to plant fatty acids to improve workability.

Appropriate addition amount of plant fatty acid is 0.1 to 10% by weight, if less than this range is insufficient input effect, if it exceeds this range there is a manufacturing difficulty and adversely affect the physical properties of the obtained plastic product.

Naturally, additives commonly used such as antioxidants, heat stabilizers, viscosity improving agents, and the like may be added in the process as necessary.

In addition, a drying catalyst may be added to the plant fatty acid in order to improve workability in a mixing process or a coating process, or the bonding speed may be improved by heating the plant fatty acid in air or in the absence of air.

Since the plastic products of the present invention have remarkably improved physical properties such as strength and elongation, and have excellent antimicrobial properties and elasticity, they can be effectively used as food packaging films, food storage containers, cardboard, refrigerator interior materials, and various kinds of bottles.

1 is a solid NMR graph of a polyester film containing no plant fatty acids,
2 is a solid NMR graph of a polyester film containing 1% by weight of plant fatty acid,
3 is a solid NMR graph of a polyester polymer chip containing 5% by weight of plant fatty acids.

   An embodiment of the present invention is as follows.

[Examples 1 to 3 and Comparative Example 1]

   A masterbatch was prepared with the composition as shown in Table 2 below, and the masterbatch was molded into a film that could be used as a food packaging wrap using a conventional tee-die method using a tee-die extruder.

Specimens were taken from the molded film and subjected to the antimicrobial test of Experimental Example 1 below.

Polyvinyl chloride DOA Soybean oil Heat stabilizer Antifog Flaxseed oil Example 1 76 18 3 One One 1.0 Example 2 74 18 3 One One 3.0 Example 3 72 18 3 One One 5.0 Comparative Example 1 77 18 3 One One 0

Experimental Example 1. Antimicrobial Evaluation Test

  From the films obtained in the above Examples and Comparative Examples, the specimens were cut to a size of 10 cm 2, and 100 μl of the precultured suspension of test cells as described in Table 3 was inoculated therein, and the pressure was closely maintained to maintain a temperature of 37 ° C. After 24 hours of incubation in a thermo-hygrostat, the number of viable cells was counted to determine the percentage of the number of viable cells ((first viable cell number-final viable cell number) / initial bacterial number * 100).

Test strain Example 1 Example 2 Example 3 Comparative Example 1 Escherichia coli 54% 85% 99% -12% Staphylococcus aureus 72% 88% 99% -10%

Example 4 and Comparative Example 2

      1% by weight of flaxseed oil was added to the polyester chip at the top of the extruder using a separate classifier and extruded by a conventional manufacturing method to obtain a film. The manufacturing conditions at this time were line speed, dropping ratio and casting process according to the conventional method, the longitudinal draw ratio was 0.5 to 2.0 in each step through 1 to 6 steps to increase the total draw ratio to 3.5 times, the temperature range at this time Was set to 20 to 250 ° C. The temperature condition of the transverse stretching was performed in the range of 50 to 220 ° C., and a film having a thickness of 25 μm was prepared by stretching at a transverse direction (TD) elongation of 7000 mm (Example 4).

Comparative Example 2 was carried out in the same manner as in Example 4, but did not add flaxseed oil.

Solid NMR test results for the films obtained by Example 4 and Comparative Example 2 were the same as in FIGS. In FIG. 2, the peak which does not exist in FIG. 1 started to arise in 30 ppm region finely. The peak in the 30 ppm region is an alkyl group, which is derived from charged flaxseed oil.

As a result of testing the antistatic property on the film obtained in Example 4, the surface resistivity (KS K 0170: 2008) was 1.4 × 10 ¹² (Ω) {Test conditions: (20 ± 2) ° C, (40 ± 2)% RH}, {application voltage: 100V, 60 seconds} was very good. The surface resistivity of a general film is 1.0 * 10 <^14> (Pa) or more.

[Example 5]

5% by weight of flaxseed oil was added to the polyester polymerization test facility immediately before the ES reaction, and the Mole ratio 1: 1.12, Sb ₂ O ₃ (250 ppm), TiO ₂ (3,000 ppm), H ₃ PO ₄ (200 ppm), and the final reaction. ES reaction was advanced on the conditions of the temperature of 255 degreeC and reaction time of 210 minutes. Then a final temperature of 287 ° C. A reaction time of 220 minutes and a PC reaction under a vacuum 0.4torr conditions to prepare a polyester polymer chip.

      The Mole ratio means {(EG injection amount / EG molecular weight 62.07) / (TPA injection amount / TPA molecular weight 166.13)}.

The result of performing the solid NMR test on the obtained polymer chip was as shown in FIG. In FIG. 3, the peak (alkyl group) which was not found in FIG. 1 in 30 ppm region was clear.

Claims (9)

   A method for producing a plastic product containing plant fatty acid, characterized in that the synthetic resin is molded by a conventional method by containing 0.1 to 10.0% by weight of plant fatty acid.    The method of producing a plastic product containing plant fatty acid according to claim 1, wherein the method of incorporating the plant fatty acid into the synthetic resin comprises coating the plant fatty acid onto the synthetic chip before molding.    The method for producing a plastic product containing plant fatty acid according to claim 1, wherein the method of incorporating the plant fatty acid into the synthetic resin is made of a master batch chip by mixing the plant fatty acid with the synthetic resin.     The method for producing a plastic product containing plant fatty acid according to claim 1, wherein the method of adding the plant fatty acid to the synthetic resin is adding the plant fatty acid in the polymerization step of the synthetic resin.     The method for producing a plastic product containing plant fatty acid according to claim 1, wherein the method of containing the plant fatty acid in the synthetic resin is continuously added to the extruder during extrusion of the synthetic resin using a separate feeder.     The plant fatty acid of claim 1, wherein the plant fatty acid is linoleic acid, oleic acid, stearic acid, palmitic acid, rica. A method for producing a plastic product containing plant fatty acid, characterized in that it comprises at least one component selected from linic acid and ricinol acid.     A plastic product prepared according to any one of claims 1 to 5 and containing from 0.1 to 10.0% by weight of plant fatty acids. 8. A plastic product containing plant fatty acid according to claim 7, wherein the surface resistivity is 1.0 × 10 ¹⁴ (kPa) or less. The plastic product containing plant fatty acid according to claim 8, wherein the surface resistivity is 1.0 × 10 ¹³ (Pa) or less.

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