KR20190140646A - A process for preparing plastic air freshener with marbling pattern - Google Patents

Abstract

The present invention relates to a production method of a plastic air freshener with a marbling pattern and, more specifically, to a production method of a novel plastic air freshener, which uses ethylene vinyl acetate (EVA) pellets impregnated with liquid flavoring and a first pigment and having a vinyl acetate (VA) content of 20 to 25% as a base resin, uses a master batch consisting of ethylene vinyl acetate (EVA) having a vinyl acetate (VA) content of 26 to 30% and a second pigment to express the marbling pattern such as natural marble on a surface of a molded product by using the fluidity difference between the base resin and the master batch and the color difference between the first pigment and the second pigment.

Description

A process for preparing plastic air freshener with marbling pattern

The present invention relates to a method for producing a plastic fragrance having a marbling pattern, to be described in more detail, ethylene vinyl acetate (EVA) having a liquid perfume and a first pigment impregnated and having a vinyl acetate (VA) content of 20 to 25%. The pellets are used as the base resin, and by using a master batch made of ethylene vinyl acetate (EVA) having a vinyl acetate (VA) content of 26 to 30% and a second pigment, The present invention relates to a method for producing a new plastic fragrance which can express a marbling pattern such as natural marble on the surface of a molding by using the fluidity difference and the color difference between the first pigment and the second pigment.

Plastic fragrance impregnated with synthetic resins with a fragrance function has the advantage of being able to develop a variety of products because of its excellent processability, but its fragrance persistence and fragrance strength are rather weak. It has been limited. In addition, when rubber, silicone, polypropylene (PP), polyethylene (PE), or the like is used as the supplement resin, there is a problem that the characteristic smell of the resin deteriorates or contaminates the inherent aroma of the aromatic component.

In order to solve such a problem, Korean Patent Publication No. 10-1998-034312 (1998.08.05.) And Patent No. 10-458129 (2004.11.11.) Are also referred to as ethylene vinyl acetate (hereinafter referred to as 'EVA'). The aromatic resin compositions using the resin as the auxiliary resin are introduced. Such conventional EVA aromatic resin composition has a relatively good orientation and steering properties, but the overall process is complicated and the manufacturing cost is high.

Thus, the inventor in the patent registration No. 10-1682074 (2016.11.28.), The step of dissolving the blowing agent in the liquid fragrance, impregnating the liquid fragrance into the ethylene vinyl acetate pellets of the auxiliary resin, and the ethylene vinyl A method for producing a plastic fragrance comprising injection molding acetate pellets alone or together with linear low density polyethylene (LLDPE) pellets has been introduced.

The plastic fragrance prepared in this way has excellent fragrance persistence and fragrance strength, and in particular, easy molding and low manufacturing cost, but there is room for improvement in that the pattern and color are rather monotonous. In particular, considering that the use of the plastic fragrance is mainly a variety of accessory products, interior or car decoration, clothing attachments, etc., it is possible to express a variety of colors according to the taste of the consumer and the preference of the product. It can be an important factor to improve.

Meanwhile, Patent No. 10-936730 (January 6, 2010) includes a phenol resin, which is a basic resin, a melamine resin forming a pattern, and an inorganic filler, and the difference in color and fluidity between the resins. Due to this, molding materials expressing marbling patterns during molding have been introduced. Such a molding material has the effect of molding a product having a beautiful pattern without using a conventional film coating method, but there is a problem that the phenol resin and melamine resin are not suitable for use as a fragrance resin for plastic fragrance.

Patent Publication No. 10-1998-034312 (1998.08.05.) Patent Registration No. 10-458129 (Nov. 11, 2004) Registered Patent No. 10-936730 (2010.01.06.) Patent Registration No. 10-1682074 (2016.11.28.)

Accordingly, an object of the present invention is a method of manufacturing a plastic fragrance having excellent steering properties and moldability, a marbling pattern such as natural marble is expressed on the surface of the fragrance, so that a new plastic can improve consumer's preference and product quality. It is to provide a method for producing a perfume.

A method for producing a plastic fragrance with a marbling pattern according to the present invention comprises the steps of: (A) dissolving a first pigment in a conventional liquid perfume to obtain a pigment perfume mixture liquid; (B) using a ethylene vinyl acetate (EVA) pellet having a vinyl acetate (VA) content of 20 to 25% as a base resin and impregnating it in the pigment flavor mixture to prepare a perfume-impregnated base resin; (C) preparing a pellet-type master batch containing a second pigment using ethylene vinyl acetate (EVA) having a vinyl acetate (VA) content of 26 to 30% as a carrier resin; (D) mixing the perfume-impregnated base resin prepared in step (B) with the master batch obtained in step (C) to obtain a mixed resin composition; (E) molding the plastic fragrance of a predetermined shape by injecting the mixed resin composition obtained in the step (D) at a temperature of 80 ~ 85 ℃; Characterized in that it is prepared to include.

According to the present invention, it is possible to express a high quality marbling pattern such as natural marble on the surface of the plastic fragrance without performing a cumbersome work process such as conventional film transfer or printing, thereby improving consumer preference and product quality at low cost. There is an effect that can be improved.

In addition, the method for producing a plastic fragrance according to the present invention, because the low-temperature injection of the mixed resin composition of the raw material resin at a temperature of 80 ~ 85 ℃ minimizing the loss of the aromatic components impregnated into the base resin during the injection process as a result This has the effect of improving performance.

1 is a real picture of a plastic fragrance prepared according to an embodiment of the present invention,
Figure 2 is a real picture of the plastic fragrance prepared according to the comparative example of the present invention.

Hereinafter, the present invention will be described in detail. However, even if the configuration is essential to practice the present invention, detailed descriptions of the matters that are introduced in the prior art or that can be easily implemented by those skilled in the art can be omitted.

The method for producing a plastic fragrance according to the present invention comprises the steps of (A) preparing a pigment flavor mixture, (B) preparing a perfume impregnation base resin, (C) preparing a master batch, (D) a mixed resin Drafting the composition, and (E) injection and molding.

First, in step (A), the first pigment is added to a conventional liquid perfume and dissolved for 15 to 20 minutes while stirring at 70 to 100 rpm at room temperature to prepare a pigment flavor mixture. The liquid fragrance is used as a raw material of a conventional fragrance, it is also possible to use natural fragrance, synthetic fragrance or mixed fragrance thereof. Specifically, herbal flavors such as lavender, mint and jasmine extract, flower flavors such as roses, lilies and lilac Axis, fruit flavors such as lemons, strawberries, bananas, apples and grape flavors can be used. In addition, chocolate, coffee, Synthetic flavors such as vanilla flavors may also be used.

In addition, the first pigment serves to provide a background color to the base resin in the future, and pigments used in conventional plastic injection, for example, extender pigments, rust preventive pigments, color pigments, light emitting pigments, and the like may be used. And it is preferable that the usage-amount of the said 1st pigment is 0.2-1 weight part with respect to 100 weight part of said liquid fragrances.

On the other hand, in the step (A), the pigment flavor mixture may additionally contain 3 to 10 parts by weight of the blowing agent based on 100 parts by weight of the liquid perfume. The blowing agent serves to facilitate the impregnation of the pigment flavor mixture by foaming the EVA pellet, which is a basic resin, in the next step B), sodium bicarbonate, ammonium carbonate, ammonium bicarbonate, ammonium nitrite, sodium borohydride , Azodicarbonamide, dinitropenta methylenetetraamine, oxybisbenzenesulfonyl hydroxide, toluenesulfonyl hydroxide and the like can be used.

Next, in the step (B), ethylene vinyl acetate (EVA) pellets, which are basic resins, are impregnated into the pigment flavor mixture to prepare a perfume-impregnated base resin. At this time, the ethylene vinyl acetate (EVA) pellet is used that the content of vinyl acetate (VA) 20 ~ 25%.

In more detail the step (B), for example, spraying the pigment flavor mixture obtained in the step (A) to the EVA pellet in a rotary chamber mixer, preferably for 2 hours while maintaining the external temperature 30 ℃ While stirring at 150 rpm. At this time, the rotary chamber mixer should be completely sealed from the outside. And the temperature inside the rotary chamber mixer is about 45 ℃, the vacuum pressure preferably satisfies the conditions of 40 ~ 50cmHg.

The EVA pellet is then impregnated with the perfume pigment mixture prepared in the step (A) into the pores open the pores. Thus, the base impregnating resin has a function of relieving the fragrance of the liquid fragrance impregnated in the pores little by little and at the same time has the same base color as a whole by the second pigment deposited in the pores.

For reference, in the present invention, although the first pigment of step (A) may be directly colored on the surface of the base resin of step (B), in this case, the first pigment in powder form of EVA pellets It is difficult to distribute evenly on the surface, and furthermore, there is a problem in that dust is generated due to the nature of the powder to contaminate the working environment. Therefore, in the present invention, in the step (A), the first pigment is first dissolved in a liquid perfume to prepare a pigment flavor mixture, and then the method of impregnating the pigment flavor mixture into the base resin is used.

In the step (B), the amount of the pigment flavor mixture is preferably impregnated 10 to 30 parts by weight based on 100 parts by weight of the basic resin. At this time, when the amount of the pigment flavor mixture is less than 10 parts by weight, there is a problem of lack of the steering function and the background color is too weak, on the contrary, if the amount exceeds 30 parts by weight, the excess amount of the pigment flavor mixture is more than the amount impregnated in the basic resin This can be difficult to process and can result in waste of raw materials.

Next, in the step (C), using a ethylene vinyl acetate (EVA) having a vinyl acetate (VA) content of 26 to 30% as a carrier resin, a pellet-type master batch containing a second pigment is used. Prepare. As the master batch used in the present invention, it is suitable to use a white master batch which can easily express a marbling pattern on the background color provided by the base resin as a solid pigment. In particular, the second pigment included in the master batch is preferably titanium dioxide having excellent dispersibility, whiteness, and coloring power.

It is preferable that the composition ratio of the said masterbatch contains 10-50 weight part of said 2nd pigments with respect to 100 weight part of said carrier resins. The master batch can be purchased and used on the market. In the present invention, the first pigment used in step (A) and the second pigment used in step (C) use pigments different in color and concentration.

In step (D), the perfume-impregnated base resin obtained in step (B) and the master batch obtained in step (C) are mixed to obtain a mixed resin composition. The master batch functions to provide a marbling pattern to the molding in the future. It is preferable to mix 0.5-5 parts by weight of the master batch with respect to 100 parts by weight of the perfume-impregnated base resin.

In the present invention, when the amount of the master batch is less than 0.5 parts by weight, it is difficult to express the marbling pattern or the texture, and on the contrary, when the amount of the master batch exceeds 5 parts by weight, the background color of the base resin may be whitened as a whole.

Finally, in step (E), the mixed resin composition obtained in step (D) is injected at a temperature of 80 to 85 ° C to mold a plastic fragrance of a predetermined shape. As is well known, ethylene vinyl acetate (EVA) used as the base resin and the carrier resin in the present invention is a copolymer of ethylene and vinyl acetate (VA), the elasticity and melting point, depending on the content (VA) of VA, Physical and chemical properties such as fluidity are different. In general, the higher the content of VA, the higher the temperature required for injection molding the EVA is proportionately increased, and further, the fluidity generally decreases in the molten state at the same temperature.

In the present invention, the basic resin and the carrier resin are dissolved to enable injection at a temperature of 80-85 ° C., which is the injection temperature of the step (E), but show different fluidity at the same injection temperature. That is, the base resin has high fluidity and the carrier resin has low fluidity. Therefore, the second pigment included in the master batch, such as white titanium dioxide, is not completely dissolved or dispersed at the injection temperature, but is trapped in the carrier resin. Due to such a difference in fluidity, the plastic fragrance manufactured according to the present invention expresses a gorgeous marbling pattern such as natural marble in the injection process.

For reference, in the case of the conventional plastic fragrance, injection should be generally performed at a temperature of 110 ° C. or higher, and even in the case of EVA fragrance, injection molding was carried out at a temperature of 90 to 100 ° C., so that the loss of fragrance components impregnated in the base resin was relatively high. In the present invention, since the injection at a low temperature of 80 ~ 85 ℃ relatively has the effect of minimizing the loss of fragrance components.

Hereinafter, the present invention will be described in more detail with reference to preferred embodiments. However, the protection scope of the present invention is not limited by these examples.

Example 1

0.5 parts by weight of gray powder pigment (Grade 5C) is added to 100 parts by weight of lavender perfume, and stirred at 70 to 100 rpm at room temperature for 15 to 20 minutes to prepare a pigment flavor mixture.

100 parts by weight of the EVA resin having a VA content of 22% and 20 parts by weight of the pigment flavor mixture were added to a rotary chamber mixer, while maintaining the outside temperature at 30 ° C. for 2 hours, the temperature inside the chamber mixer was 45 ° C., and the vacuum pressure was Maintain 40-50 cmHg. The rotary chamber mixer was stirred at 150 rpm, and after confirming that the remaining amount of the pigment perfume mixture solution was completely impregnated, a perfume-impregnated base resin was obtained.

100 parts by weight of the perfume-impregnated base resin was mixed with 2 parts by weight of a commercially available white masterbatch (Kyungshin Chemical; B-42-10), and injected at an injection temperature of 80 ° C. using a compression thermoforming machine to obtain a size of 45 ×. A plastic fragrance in the form of an oval button of 35 mm is molded.

Example 2

0.3 parts by weight of blue powder pigment (Oil Blue 2N) was added to 100 parts by weight of lavender perfume, and stirred at 70 to 100 rpm at room temperature for 15 to 20 minutes to prepare a pigment flavor mixture.

100 parts by weight of the EVA resin having a VA content of 22% and 25 parts by weight of the pigment flavor mixture were added to a rotary chamber mixer, while maintaining the external temperature at 30 ° C. for 2 hours, the temperature inside the chamber mixer was 45 ° C., and the vacuum pressure was Maintain 40-50 cmHg. The rotary chamber mixer was stirred at 150 rpm, and after confirming that the remaining amount of the pigment perfume mixture solution was completely impregnated, a perfume-impregnated base resin was obtained.

Add 100 parts by weight of the perfume-impregnated base resin to 3 parts by weight of a commercially available white masterbatch (Kyungshin Chemical; B-42-10), and inject it at an injection temperature of 83 ° C. using a compression thermoforming machine to obtain a size of 45 x. A plastic fragrance in the form of an oval button of 35 mm is molded.

Example 3

0.5 parts by weight of red powder pigment (red 225) and 5 parts by weight of sodium bicarbonate were added to 100 parts by weight of lavender perfume, and stirred at 70 to 100 rpm at room temperature for 15 to 20 minutes to prepare a pigment flavor mixture.

100 parts by weight of the EVA resin having a VA content of 22% and 30 parts by weight of the pigment flavor mixture were added to a rotary chamber mixer, while maintaining the external temperature at 30 ° C. for 2 hours, the temperature inside the chamber mixer was 45 ° C., and the vacuum pressure was Maintain 40-50 cmHg. The rotary chamber mixer was stirred at 150 rpm, and after confirming that the remaining amount of the pigment-flavor mixture liquid was completely impregnated, a perfume-impregnated base resin was obtained.

5 parts by weight of a commercially available white masterbatch (Kyungshin Chemical; B-42-10) was added to 100 parts by weight of the perfume-impregnated base resin, and injected at an injection temperature of 85 ° C. using a compression thermoforming machine to obtain a size of 45 x. A plastic fragrance in the form of an oval button of 35 mm is molded.

Example 4

0.8 parts by weight of brown powder pigment (B-39) and 7 parts by weight of sodium bicarbonate were added to 100 parts by weight of lavender fragrance, and stirred at 70 to 100 rpm at room temperature for 15 to 20 minutes to prepare a pigment flavor mixture.

100 parts by weight of the EVA resin having a VA content of 22% and 30 parts by weight of the pigment flavor mixture were added to a rotary chamber mixer, while maintaining the external temperature at 30 ° C. for 2 hours, the temperature inside the chamber mixer was 45 ° C., and the vacuum pressure was Maintain 40-50 cmHg. The rotary chamber mixer was stirred at 150 rpm, and after confirming that the remaining amount of the pigment-flavor mixture liquid was completely impregnated, a perfume-impregnated base resin was obtained.

100 parts by weight of the perfume-impregnated base resin was mixed with 1 part by weight of a commercially available white masterbatch (Kyungshin Chemical; B-42-10), and injected at an injection temperature of 80 ° C. using a compression thermoforming machine to obtain a size of 45 x. A plastic fragrance in the form of an oval button of 35 mm is molded.

Example 5

0.5 parts by weight of earthy powder pigment (B-40-629U) was added to 100 parts by weight of lavender fragrance, and stirred at 70 to 100 rpm at room temperature for 15 to 20 minutes to prepare a pigment flavor mixture.

100 parts by weight of the EVA resin having a VA content of 22% and 25 parts by weight of the pigment flavor mixture were added to a rotary chamber mixer, while maintaining the external temperature at 30 ° C. for 2 hours, the temperature inside the chamber mixer was 45 ° C., and the vacuum pressure was Maintain 40-50 cmHg. The rotary chamber mixer was stirred at 150 rpm, and after confirming that the remaining amount of the pigment perfume mixture solution was completely impregnated, a perfume-impregnated base resin was obtained.

100 parts by weight of the perfume-impregnated base resin and 2 parts by weight of a white masterbatch (Kyungshin Chemical; B-42-10) were mixed and injected at an injection temperature of 85 ° C. using a compression thermoforming machine to obtain an oval button having a size of 45 × 35mm. Mold the plastic fragrance in the form.

[Comparative Examples 1 to 3]

In the same manner as in Examples 1 to 3, but without adding a pigment to the pigment-flavor mixture liquid, it is colored only by the master batch corresponding to each color, the size is 45 x 35mm by injection at a temperature of 92 ~ 95 ℃ Plastic fragrance in the form of an oval button.

The photographs taken by selecting one from each of the plastic fragrances prepared according to the above Examples and Comparative Examples are included in FIGS. 1 and 2. The plastic fragrances prepared according to Examples 1 to 5 of the present invention have a clear marbling pattern as shown in FIG. 1, but the plastic fragrances prepared according to Comparative Examples 1 to 3 are marbling as shown in FIG. 2. There was no pattern at all.

[Performance Performance Test]

The plastic fragrances prepared according to Examples 1 to 5 and Comparative Examples 1 to 3 were tested for steering performance in the following manner, and the results are shown in the following [Table 1]. In the test method, 10 subjects randomly selected were subjected to sensory evaluation by olfactory sense in a sealed place between 09 am and 10 am on the day at 5 days intervals for 20 days from the start of the test.

The evaluation criteria is based on the intensity of smell sensed by each subject in the first sensory test for each sample by '10 points', and the intensity of the smell felt by each subject on the test date every 5 days thereafter. After assessing by quartile scores, the scores of all subjects were summed.

division Sensory test Early 5 days 10 days 15th 20 days Example 1 100 90 82 76 59 Example 2 100 90 81 77 55 Example 3 100 85 80 72 46 Example 4 100 90 85 82 60 Example 5 100 90 81 79 62 Comparative Example 1 100 87 78 70 52 Comparative Example 2 100 85 75 58 45 Comparative Example 3 100 90 81 77 55

As shown in the results of Table 1, the plastic fragrances prepared according to Examples 1 to 5 of the present invention have substantially the same or slightly better steering performance as compared to the plastic fragrances prepared according to Comparative Examples 1 to 3. appear.

Claims (6)

(A) dissolving the first pigment in a conventional liquid fragrance to obtain a pigment fragrance mixture;
(B) using a ethylene vinyl acetate (EVA) pellet having a vinyl acetate (VA) content of 20 to 25% as a base resin, and impregnating the pigment-flavor mixture solution therein to prepare a perfume-impregnated base resin;
(C) preparing a pellet-type master batch containing a second pigment using ethylene vinyl acetate (EVA) having a vinyl acetate (VA) content of 26 to 30% as a carrier resin;
(D) mixing the perfume-impregnated base resin obtained in step (B) with the master batch obtained in step (C) to obtain a mixed resin composition;
(E) molding the plastic fragrance of a predetermined shape by injecting the mixed resin composition obtained in the step (D) at a temperature of 80 ~ 85 ℃;
Method for producing a plastic fragrance having a marbling pattern characterized in that it is produced, including.
The method of claim 1, wherein in the step (A), the pigment fragrance mixture further comprises 3 to 10 parts by weight of a blowing agent with respect to 100 parts by weight of the liquid perfume.
The method according to claim 1 or 2, wherein in the step (B), 10 to 30 parts by weight of the pigment flavor mixture is impregnated with respect to 100 parts by weight of the base resin.
The method of claim 1 or 2, wherein in the step (D), 0.5-5 parts by weight of the master batch is mixed with respect to 100 parts by weight of the perfume-impregnated base resin.
The method of claim 4, wherein the master batch comprises titanium dioxide as the second pigment.
According to claim 1 or 2, wherein the base resin of the step (B) is used as the carrier resin of the step (C) using an ethylene vinyl acetate (EVA) resin having a vinyl acetate (VA) content of 22% Is an ethylene vinyl acetate (EVA) resin having a vinyl acetate (VA) content of 27%, and in the step (E), the plastic having a marbling pattern, wherein the mixed resin composition is injection molded at a temperature of 83 ° C. Method for producing a fragrance.

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