JPH06286754A - Scratch-proof glass bottle and manufacture thereof - Google Patents

Abstract

PURPOSE:To provide a glass bottle having a high scratch-proof effect for a long term wherein a coating of silicone oil tightly couples to a glass surface. CONSTITUTION:This is a scratch-proof glass bottle 10 wherein silicone oil 12 is baked to be applied on a glass bottle body 11 with alkalic components on a surface removed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scratch-resistant glass bottle and a method for manufacturing the same.

[0002]

2. Description of the Related Art Usually, glass bottles filled with beer or juice are collected and reused after use. In these so-called returnable bottles, the bottles may come into contact with each other and cause scratches on the surface during distribution and collection and during the bottling process. The scratches on the surface of the bottle impaired the appearance of the bottle and significantly reduced the commercial value of the bottled beverage.

Examples of such a method for preventing scratches on the surface of a bottle and a composition therefor include, for example, a method of applying a polymer of an organic silicon compound such as silicone oil to the surface of the bottle (described in JP-A-57-179053). ), A technique such as a scratch coating composition (described in JP-A-4-182328) comprising at least one of medium-chain fatty acid triglyceride, long-chain unsaturated triglyceride, and liquid paraffin. Of these,
It is considered useful to apply a solution of an anti-scratch agent consisting of silicone oil and an organic solvent to a washed and dried glass bottle by spraying or the like.

However, in these conventional methods,
There has not been taken sufficient measures to elute the alkaline component contained in the glass bottle base material onto the glass surface over time. Therefore, due to this, the bonding force between the silicone oil and the glass bottle base is lowered, and the silicone oil coating film is deteriorated or peeled off, and it is difficult to obtain a sufficient effect of preventing scratches for a long period of time.

[0005]

SUMMARY OF THE INVENTION The present invention has been proposed in order to solve such a problem, and a silicone oil film is firmly bonded to the glass surface, and has a high effect of preventing scratches over a long period of time. SUMMARY OF THE INVENTION An object of the present invention is to provide a scratch-preventing glass bottle having a scratch and a method for producing the same.

[0006]

There are two inventions proposed here. That is, the first aspect of the present invention relates to a scratch-resistant glass bottle, characterized in that a glass bottle mother body from which an alkaline component on the surface has been removed is coated with silicone oil by baking.

A second aspect of the present invention is a dealkalizing treatment step in which a glass bottle matrix of soda-lime glass is subjected to a catalytic reaction in the presence of a reaction gas of sulfur or its compound or chloride to remove an alkaline component on the glass surface. The step of washing and drying the bloom produced in the glass bottle base by the dealkalizing step, the step of applying silicone oil to the washed glass bottle base, and the glass bottle base coated with the silicone oil It relates to a method for manufacturing a scratch-resistant glass bottle, which comprises a step of baking.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the accompanying drawings. FIG. 1 is a cutaway sectional view showing an example of the scratch preventing glass bottle of the present invention, and FIG. 2 is a sectional view showing an example of a dealkalizing treatment step.

As shown in FIG. 1, a scratch-resistant glass bottle 10 of the present invention comprises a glass bottle base 11 having a surface coated with silicone oil 12 by baking.

As the glass bottle base 11, bottles made of well-known soda-lime glass, which are widely used and widely used for beer, juice, etc., can be used, and if necessary, tempered glass and laminated glass can be used. Etc. can also be used.

A known silicone oil is used as the silicone oil 12, and in the embodiment, a trade name "KF8" is used.
70 "," KF96 "," KF99 "(Shin-Etsu Silicone Co., Ltd.) and the like were used. Further, the silicone oil 12 is used after being diluted to an appropriate concentration depending on its type and viscosity, and the concentration is preferably 0.2 to 2% (volume%). According to the experiment, it was found that when the silicone oil concentration is less than 0.2%, a high scratch preventing effect cannot be obtained, and when the silicone oil concentration is more than 2%, the cost increases and the baking process takes time.

As the solvent for diluting the silicone oil 12, a known organic solvent which is compatible with the silicone oil and has a high wetting property for the glass bottle base 11 is used. Preferably n-hexane,
Examples include n-heptane and diethyl ether.

Next, the manufacturing method of the present invention will be described. The manufacturing method of the present invention includes a dealkalizing treatment step, a washing step, a coating step and a baking treatment step.

The dealkalizing process is performed in the glass bottle base 1
(1) For removing the alkaline component on the surface, and for removing the alkaline component on the glass surface by contacting a reaction gas of sulfur or its compound or chloride with a glass bottle matrix made of soda-lime glass Is. Thereby, the baking coating of the silicone oil 12 can be ensured, the alkaline component can be prevented from being eluted from the surface of the glass bottle mother body after the scratch prevention treatment, and the strength and durability of the silicone oil coating can be improved. it can.

The dealkalization treatment in this step is 25
The treatment is performed in a temperature range of 0 to 650 ° C., and the treatment time is about 10 minutes to 2 hours, varying depending on the thickness of the glass bottle base, the gas concentration, and the like. As the reaction gas body used in the dealkalization treatment, a simple substance of sulfur, a liquefied gas of sulfurous acid gas or anhydrous sulfuric acid, or a gas body of ammonium sulfate, ammonium chloride or the like is used.

FIG. 2 shows an example of this dealkalizing step.
Reference numeral 20 is a processing furnace, 21 is a transfer conveyor, 22 is a heater, and 23 is a spouting part of a reaction gas body. The processing furnace 20 is divided into an appropriate number of sections such as a first zone 20A, a second zone 20B, a third zone 20C, and a fourth zone 20D in the transfer direction of the glass bottle base B by the transfer conveyor 21. In the embodiment, the first zone 20A is a heating zone provided with the heater 22, the second zone 20B is a treatment zone for ejecting a reaction gas, and the third zone 20C and below are reaction zones for promoting the dealkalization reaction. ing.

As shown in the figure, a glass bottle base B made of soda-lime glass is fed from the entrance of the processing furnace 20 onto a transfer conveyor 21 inside. Heaters 22 and 22 are provided in the first zone 20A located at the inlet of the processing furnace 20 to heat the glass bottle base B to a temperature suitable for dealkalization. The glass bottle base material B heated in the first zone 20A moves above the transfer conveyor 21 in the second zone 20A.
Sent to B.

In the second zone 20B, the transfer conveyor 21
An ejection portion 23 for the reaction gas body is provided above, and an appropriate number of ejection nozzles 24 are provided. Gas is ejected from the ejection nozzle 24 toward the mouth portion of the glass bottle body B. The ejection part 23 may be provided at one place, but may be provided at a plurality of places for more reliable processing.

The glass bottle base B is moved from the third zone 20C to the fourth zone 20D by the moving conveyor 21 in the atmosphere of the reaction gas having a predetermined concentration.
The alkaline component on the glass surface causes a catalytic reaction with the reaction gas and is extracted and removed. Then, in the vicinity of the final zone, the glass bottle base material B is cooled to about room temperature and the dealkalization step is completed. It is preferable that the fan 25 is installed in the third zone 20C and subsequent processing steps of the embodiment so that the gas in the zone is convected to make its concentration uniform.

Next, using distilled water, the bloom (cloudiness) generated on the surface of the glass bottle base in the dealkalizing step is washed, and after washing, about 1 unit is applied to the glass bottle base.
It is dried by blowing hot air at 20 ° C for 30 minutes, and then switched to cold air and cooled to 30 ° C.

Silicone oil diluted to 0.2 to 2% (volume%) is applied to the glass bottle base material dried in the washing step.

The silicone oil coating method is appropriately selected depending on the shape and size of the glass bottle base to be coated, and includes spray coating method, dipping method, brush coating method, cloth coating method and the like. Therefore, the spray coating method and the dipping method are preferable from the viewpoint of workability.

Subsequently, the glass bottle base body coated with the silicone oil is baked. In addition, in order to completely remove the solvent diluted with the silicone oil before the baking treatment, it is preferable to leave the glass bottle base at 50 to 70 ° C. (air dry).

The baking temperature of the silicone oil in this baking process is preferably 200 to 350 ° C., and particularly 2
It is 70 to 330 ° C. The baking time is preferably about 5 minutes to 1 hour, depending on the type of silicone oil,
Particularly, it is 20 to 40 minutes. This causes the silicone oil to form a siloxane bond and also reacts with the glass surface to form a strong bond.

Hereinafter, a specific manufacturing example will be illustrated, and a product example will be described in comparison with a comparative example. [Production Example] Volume 5 made of cleaned soda-lime glass
Using a 00 ml glass bottle base, under a sulfurous acid gas atmosphere,
A dealkalization treatment was performed by heating at 00 ° C. for 30 minutes. The bloom generated in the glass bottle base is washed, and hot air at 120 ° C. is blown for 30 minutes, and then cold air is blown to dry and cool.

[Product Example 1] n-Hexane of silicone oil (KF-870 (manufactured by Shin-Etsu Silicone Co., Ltd.) diluted to 0.5% (volume%) was formed on the inner surface of the glass bottle matrix obtained in the above Production Example. Apply the solution by dipping to 300
A glass bottle of Product Example 1 was obtained by performing a baking treatment by heating at about 30 ° C. for 30 minutes.

[Product Example 2] A glass bottle of Product Example 2 was obtained in the same manner as in Product Example 1, except that the concentration of silicone oil was 1.0% (volume%).

[Comparative Example 1] n- of a silicone oil (KF-870 (manufactured by Shin-Etsu Silicone Co., Ltd.)) diluted to 0.5% (volume%) in a glass bottle base body not subjected to dealkalization treatment.
A hexane solution was applied by dipping and heated at 330 ° C. for 30 minutes to perform a baking treatment to obtain a glass bottle of Comparative Example 1.

Comparative Example 2 A glass bottle of Comparative Example 2 was obtained in the same manner as in Product Example 1, except that the concentration of silicone oil was 10.0%.

The durability of the silicone oil coating on the glass bottle bases obtained in the above Examples and Comparative Examples was measured, and the results are shown in Table 1.

Further, the slipperiness of the glass bottles obtained in Example 1 and Comparative Example 1 was measured, and the results are shown in Table 2. In addition, as a reference example, the slipperiness of a glass bottle that was not subjected to dealkalization treatment or silicone oil coating treatment was measured and is shown at the same time.

Further, the scratch resistance of the glass bottles obtained in the above Examples and Comparative Examples was measured, and the results are shown in Table 3.

[Durability Measurement Test of Silicone Oil Film] A glass bottle base to be tested is dipped in distilled water to remove 121
After heating in an autoclave at 0 ° C., the state of the silicone oil coating formed on the glass bottle base and the state of the silicone oil coating peeled and suspended in the distilled water are observed.

[Sliding Property Test] The glass bottle base to be tested is immersed in distilled water, heated in an autoclave at 121 ° C., placed on a table to change the inclination, and the glass bottle base slides. Measure the slope to begin with.

[Scratch Prevention Effect Test] A glass bottle base to be tested is immersed in distilled water and heated in an autoclave at 121 ° C., and then placed in a line simulator (AGR) and vibrated to scratch the contacting bottle. Observe the generation state.

[0036]

[Table 1]

[0037]

[Table 2]

[0038]

[Table 3]

As is clear from the experimental results shown in Tables 1 to 3, the silicone oil coatings formed on the glass bottle bases of Product Examples 1 and 2 are extremely tough and must maintain a high scratch resistance for a long time. You can

[0040]

As shown and described above, according to the scratch-preventing effect glass and the method for producing the same of the present invention, since the alkali component on the surface of the glass bottle base is previously removed by the dealkalizing treatment step, the glass There was no elution of alkali from the bottle body, and the silicone oil coating baked onto the glass surface was firmly bonded to the glass, and it was possible to maintain a high anti-scratch effect for a long period of time.

[Brief description of drawings]

FIG. 1 is a cutaway sectional view showing an example of a scratch-resistant glass bottle of the present invention.

FIG. 2 is a cross-sectional view showing an example of a dealkalizing process step.

[Explanation of symbols]

 10 Scratch prevention glass bottle 11 Glass bottle base 12 Silicone oil

Claims (3)

[Claims] 1. A scratch-resistant glass bottle, characterized in that a base of the glass bottle from which alkaline components have been removed is coated with silicone oil by baking. 2. A dealkalizing treatment step of removing alkali components on the glass surface by catalytically reacting a soda-lime glass glass bottle matrix in the presence of a reaction gas of sulfur or its compound or chloride, and the dealkalizing treatment. A step of washing and drying the bloom produced in the glass bottle base by the step, a step of applying silicone oil to the washed glass bottle base, and a step of baking the glass bottle base coated with the silicone oil A method for producing a scratch-resistant glass bottle, which comprises: 3. The method for producing a scratch-resistant glass bottle according to claim 2, wherein the silicone oil is a 0.2% to 2% solution (volume%).