JPH01279058A - Glass bottle with macromolecule protective film - Google Patents

Abstract

PURPOSE:To prevent the glass from scattering at the time of breakage, and at the same time, prevent the discoloration, change in quality and change of taste of a content, by tinting a macromolecule inner film, which has been applied to the surface of a transparent glass bottle, and dispersing at least an ultraviolet absorbent, light radiation stabilizer and antioxidant, etc. on a macromolecule outer film. CONSTITUTION:A macromolecule inner film 2, which has been closely attached to the surface of a transparent glass bottle 1 and also has a proper amount of bonding force, has been lightly tinted according to a content to be bottled. Therefore, the glass bottle has transparency, and at the same time, the visual radiation which spoils the taste and causes the discoloration and change in quality can be shut out. Further, in a macromolecule outer film 3 with a high mechanical strength, which is coated on the outer surface of the macromolcule inner film 2, a ultraviolet absorbent, light radiation stabilizer and antioxidant, etc. have been dispersed. Therefore, together with the macromolecule inner film 2, the macromolecule outer film 3 shuts out the ultraviolet ray, and the tinting degree for the macromolecule inner film 2 can be lightened. Also, being protected by the macromolecule inner film 2 and macromolecule outer film 3, broken pieces of the glass bottle can be prevented from scattering at the time of breakage.

Description

[Detailed description of the invention]

The present invention relates to a transparent glass bottle having a polymer coated protective film capable of blocking light rays on the surface of the glass bottle. Conventionally, many bottled foods and beverages are commercially available, but the contents may change color or deteriorate due to exposure to ultraviolet rays, visible light, etc.
It also spoils the flavor. Therefore, when making bottles, they are colored to match the contents to block the above light rays and prevent deterioration. For example, beer bottles are colored brown, liquor bottles are colored blue, cider bottles are colored pale blue, and Coca-Cola bottles are colored pale green. However, in order to form a colored glass bottle, the glass itself must be colored, and it is extremely difficult to achieve the desired shade. Furthermore, since it is difficult to change the color of the kiln, production is carried out in a large loft, and the number of windows is limited, so the number of colors must be limited to just a few. Looking at the beer bottles currently in use, they have drawbacks such as the brown color being too dark and the glass losing its original transparency, making it impossible to see the contents, but light brown transparent beer bottles could not be used due to light blocking properties. . On the other hand, since consumers desire colorful or transparent bottles, there is an urgent need to provide bottles that meet these needs. In the present invention, the surface of a transparent glass bottle is coated with inner and outer polymer coatings, the inner polymer coating is colored, and at least the outer polymer coating contains an ultraviolet absorber, a light stabilizer, an antioxidant, etc. By being dispersed, it retains the original transparency of the bottle, and also has the function of preventing scattering when the glass bottle is broken, preventing the bottled contents from discoloring, deteriorating, or losing flavor due to light rays. An object of the present invention is to provide a glass bottle having a polymer-coated protective film that can prevent the above-mentioned problems. The present invention consists of a polymeric inner coating that is in close contact with the surface of a transparent glass bottle and has an appropriate adhesion force, and a polymeric outer coating with strong mechanical strength coated on the outer surface of the cough polymeric inner coating. A glass bottle having a molecular-coated protective film, wherein the inner polymer coating is colored, and at least the outer polymer coating has an ultraviolet absorber, a light stabilizer, an antioxidant, etc. dispersed therein. A glass bottle having a protective coating, in which the polymer inner coating is colored by mixing a coloring agent into the inner coating, or by attaching a coloring agent to the surface of the inner coating by dyeing or electrostatic coating. It is characterized by this. The polymer inner coating (2) used in the present invention is a highly elastic polymer that adheres closely to the surface of the glass molded object and has a moderate adhesive force, and is made of a natural rubber solution or latex, or a diene-based synthetic material. The material is selected from rubber solution or latex, polyvinyl chloride plastisol, organosol or powder, vinyl chloride acetic acid copolymer solution or dispersion, polyolefin synthetic resin dispersion, and the like. The polymeric outer coating (3) is a polymeric material with strong mechanical strength, burst resistance, scratch resistance, water resistance, chemical resistance, oil resistance, and weather resistance, and is made of epoxy resin, polyurethane resin, polyester resin. , a liquid or solution or dispersion of acrylic resin, polycarbonate resin, a solution of polyethylene resin, or a solution or dispersion of ethylene vinyl acetate copolymer. There are various coloring agents to be mixed into the polymeric inner coating (2), but a pigment with a small molecular weight and good compatibility is desired. In addition, basic dyes, acid dyes, diazo dyes, reactive dyes, disperse dyes, direct dyes, etc. are used as dyes to color the surface of the polymer inner coating (2). This can be done by dyeing, electrostatic painting, etc. The coloring of the polymeric inner coating (2) is adjusted to an appropriate density while maintaining transparency, and the polymeric outer coating (2) is
Combined with 3) transparency, the contents of the bottle can be clearly identified. In the glass bottle with the polymer-coated protective film of the present invention, the polymer inner coating (2), which closely adheres to the surface of the transparent glass bottle (1) and has an appropriate adhesive strength, is colored in a light color depending on the contents to be bottled. Because of this, it not only has transparency, but also can block visible light (380 to 780 nanometers) that can cause flavor loss, discoloration, and deterioration. Furthermore, ultraviolet absorbers, light stabilizers, antioxidants, etc. are dispersed in the mechanically strong outer polymer coating (3) that is coated on the outer surface of the core polymer inner coating (2). The glass bottle with the polymeric inner coating (2) can not only block ultraviolet rays but also lighten the coloring of the polymeric inner coating (2). It becomes more transparent and can present a colorful and refreshing appearance. Furthermore, this, combined with the fact that the contents are clearly visible, can contribute to increasing the level of malignancy among consumers. In addition, since the present invention is protected by the polymeric inner coating (2) and the polymeric outer coating (3) coated on the outer surface of the polymeric inner coating (2), of course, when the glass bottle is broken, broken pieces of the bottle scatter as usual. It has a function to prevent Furthermore, conventionally, when coloring a glass bottle itself, it was difficult to change the color and the number of colors was limited, making it difficult to achieve the desired shade, but with the present invention, it is possible to freely change the color by simply changing the coating solution. You can choose. Furthermore, in the present invention, the bottle can be made lighter because the polymer coating film having a small specific gravity can prevent the bottle from being damaged or scattered.

[Example 1] Polymer material source vinyl chloride paste resin for interior use 100 3
! i1 part Plasticizer 80〃 Stabilizer 2 Pigment (brown) 1-3 Exterior polymeric moisture-sensitive liquid polyurethane 100 Part by weight xylene 400〃 Ultraviolet absorber 0.5 Light stabilizer 0.5 Antioxidant 0.5 The vinyl chloride paste resin is Zeon 12 from Nippon Zeon.
1L, the plasticizer is DOP manufactured by Miki Kagaku Kogyo, the stabilizer is dibutyltin malate, the pigment is paste pigment manufactured by Dainippon Ink Chemical Industry, the wet-liquid polyurethane is Chemiglaze zO01 manufactured by Shinto Toyo Co., Ltd., and the solvent. The xylene, etc. used was from Idemitsu Kosan, the ultraviolet absorber was benzotriazole-based, the light stabilizer was hindered amine-based, the antioxidant was hindered phethane-based, and the polymer source for the inner side,
A polymer source for external use was prepared. As shown in FIG. 1, glass 11! After degreasing and washing the surface of (1), preheat the glass bottle (1) to a temperature of 160°C, immerse it in the inner polymer body fluid, and apply the inner polymer source material to the surface from the neck to the lower part. The product was placed in a heating device at 170° C. for 10 minutes to coat the polymer inner layer (2) with a thickness of about 140 microns. Further, the glass bottle (1) is cooled to 60° C. or below, immersed in the outer polymer body fluid, and the outer polymer material source is applied to the surface from the neck to the lower part, and the solvent is evaporated at room temperature. The glass bottle was allowed to stand for a period of time to be coated with a polymeric outer coating (3) having a thickness of about 100 microns, thereby obtaining a glass bottle having a polymeric protective film. Figure 3 shows the wavelength (n) of a colored film with a thickness of 10 mm.
The transmittance (%) with respect to m) is illustrated for each color. The transmittance of the glass bottle (thickness of the glass bottle itself is 3 m) having the polymer-coated protective film of this example is shown in Example 1. As shown in the figure, it is possible to block ultraviolet rays up to 380 nm and harmful visible rays up to 400 nm'.

[Example 2] Polymer source material for interior use STIRECIPTA SIEMP Copolymer rubber 100
11f-1 part doluol 80 Trichlorethylene
100 Silane cuff pulling agent
0.1 Dyeing solution Diazo dye 10g Sodium chloride 30 Soda carbonate Log Water II! External polymeric liquid xy resin for external use 100 parts by weight Hardening agent
50 Methanol 1
00 Isobutanol 6
0 〃Ultraviolet absorber 0.5 //
Light stabilizer 0.5 Antioxidant 0.5 Styrene-butadiene block copolymer rubber is Asahi Kasei Kogyo's Toughprene, and epoxy resin is Asahi Kasei Kogyo's DER.
331J, the curing agent is a modified amine consisting of teherocyclic diamine, the solvents such as doluol, trichlorethylene, and isobutanol are manufactured by Idemitsu Kosan, and the silane camping agent is KBM403 of Shin-Etsu Chemical, ultraviolet absorber, light stabilizer, and antioxidant. Using the same agent as in Example 1, polymer source materials for internal and external use were prepared. A dyeing solution was prepared using a diazo dye manufactured by Sumitomo Chemical Industries. The inner polymer source material is made to adhere to the surface of the glass bottle (1) shown in Figure 2, and the solvent is evaporated at room temperature, resulting in a thickness of approximately 10 mm.
A 0 micron polymer inner coating (2-1) is coated. Next, the surface of the polymeric inner coating (2-1) was dyed using a dyeing solution heated to 80°C to obtain a dyed layer (2-2). Finally, the above-mentioned glass bottle (1) is immersed in the liquid polymer for the outside, the solvent is evaporated at room temperature, and the bottle is placed in a heating device at 100°C for 30 minutes to coat the outer polymer coating (3) with a thickness of approximately 100 microns. At least a glass bottle with a polymer-coated protective film was obtained. The transmittance of the glass bottle (the thickness of the glass bottle itself is 3 m 1 m) having the polymer-coated protective film of this example is shown in Example 2.
It is shown as. 380nm as shown
It was able to completely block ultraviolet rays up to 500 nm and harmful visible rays up to 500 nm.

[Brief explanation of the drawing]

1 and 2 are partially cutaway longitudinal cross-sectional views of the glass bottles obtained in this example, and FIG. 3 is a transmittance curve diagram of examples 1 and 2 and other bottle glasses. 1 - Glass bottle, 2 - Polymer inner coating, 3 - Polymer outer coating.

Claims (1)

[Scope of Claims] 1) A polymeric inner coating (2) that is in close contact with the surface of the transparent glass bottle (1) and has a moderate adhesive force, and a polymeric inner coating (2) that is coated on the outer surface of the polymeric inner coating (2). In a glass bottle having a polymeric protective film coated with a highly durable polymeric outer coating (3), the polymeric inner coating (2) is colored;
At least the polymeric outer coating (3) contains an ultraviolet absorber;
A glass bottle having a protective polymer film characterized by dispersing a light stabilizer, an antioxidant, etc. 2) A glass bottle having a polymer coating protective film according to claim 1, wherein a coloring agent is mixed into the polymer inner coating (2). 3) A glass bottle having a polymer coating protective film according to claim 1, wherein a coloring agent is attached to the surface of the polymer inner coating (2).