JP2003200933A - Glass bottle having heat-sensitive label - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To increase the water-resistant bonding strength a heat-sensitive label which is pasted on a glass bottle, and to enable to use the heat-sensitive label as a pre-label for the glass bottle for which a thermosetting resin coating is applied. <P>SOLUTION: Sugars and/or their derivatives are added to the coating of the thermosetting resin, and thus, the water-resistant bonding strength for the heat-sensitive label which is pasted on the coating is increased. At the same time, a hydrophobic coating agent is applied on the heat-sensitive label and the water-resistant bonding strength of the heat-sensitive label is further increased. Thus, this glass bottle having the heat-sensitive label can be used as the pre-label. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a glass bottle with a heat-sensitive label having excellent water-resistant adhesive strength.

[0002]

2. Description of the Related Art A glass bottle has a very high strength if its surface is not scratched, but the strength is extremely lowered even if it is slightly scratched. For this reason, the normal hot end (upstream end of the slow cooling furnace)
In, a tin oxide coating is applied to the outer surface of the glass bottle. Furthermore, thermosetting resin coating may be performed on the cold end (downstream end side of the annealing furnace). This is a coating liquid that contains thermosetting resins such as epoxy, melamine, acrylic, and urethane, and styrene-butadiene rubber, surfactants, silane coupling agents, coloring agents, etc., if necessary. It coats the outer surface. Such a coating not only protects the glass surface from scratches, but can also color the bottle, decorate it in a frosted tone, and block UV light. The heat-sensitive label is attached on such a coating film.

A heat-sensitive label has a heat-sensitive adhesive layer provided on the back surface of a label substrate. The heat-sensitive adhesive layer may be heated and activated before being attached to a glass bottle. It is also possible to apply the label by heating the outer surface in advance and pressing the label on the outer surface.

Thermal labels are used as post labels. That is, the heat-sensitive label is attached to the glass bottle after filling the contents with a bottler.

[0005]

The heat-sensitive label is usually difficult to use as a pre-label (a label attached by a glass bottle manufacturer). This is because the heat-sensitive label attached on the resin coating does not have water resistance, and the label comes off during the glass bottle washing process in the bottler. However, since labelling by a bottler is often bothersome in terms of labeler maintenance and label management, there is a strong demand for pre-labeling by a glass bottle manufacturer.

The present invention, in a glass bottle coated with a thermosetting resin, improves the water-resistant adhesive strength of a heat-sensitive label affixed to the glass bottle and does not peel even if it survives the washing process of the glass bottle in a bottler. The problem was to develop a glass bottle with a heat-sensitive label that can be used as.

[0007]

According to the present invention, an outer surface is coated with a coating liquid containing a thermosetting resin and a saccharide and / or a derivative thereof, and then a heat-sensitive label is attached on the coating film. The glass bottle with a heat-sensitive label is characterized in that a hydrophobic coating agent is further applied thereon.

On the outer surface of the glass bottle, a coating liquid containing a thermosetting resin such as urethane resin and the above-mentioned saccharide and / or its derivative in an appropriate amount is applied and heated to form a coating film. Attach it. The concentration of the saccharide and / or its derivative is suitably about 0.01 to 3.0% in the case of sodium salt of CMC (carboxymethyl cellulose) or sodium alginate.
A colorant and other additives can be appropriately added to the thermosetting resin such as urethane resin. As a coating method, a spraying method, a brush coating method, a dobu pickling method, or the like can be appropriately used. The drying method may be natural drying or forced drying. The coating can be performed at any time after the vicinity of the exit of the annealing furnace in the glass bottle manufacturing process.

After applying the heat-sensitive label, a hydrophobic coating agent is applied to further improve the water resistant adhesive strength. The hydrophobic coating agent may be any hydrophobic material such as resin, silicone, fats and oils, and the application method can be appropriately selected from spraying, brush coating, dobbing, and the like. The drying method may be natural drying or forced drying.

In the present invention, the coating layer formed on the outer surface of the glass bottle contains a thermosetting resin such as urethane resin and saccharides and / or derivatives thereof. It is applied and prevents the glass from being damaged. Further, hydrophilicity is imparted by the sugar and / or its derivative, and the water-resistant adhesive strength of the heat-sensitive adhesive of the heat-sensitive label is improved. Further, by applying a hydrophobic coating agent, the water resistant adhesive strength is further improved.

Further, according to the present invention, a thermosetting resin coating formed on the outer surface is coated with a coating liquid containing a saccharide and / or a derivative thereof, and a heat-sensitive label is attached on the coating. A glass bottle with a heat-sensitive label, characterized in that a hydrophobic coating agent is applied thereon. A thermoplastic resin such as polyethylene can be added to the coating liquid containing the saccharide and / or its derivative.

The outer surface of the glass bottle is coated with a coating liquid containing a thermosetting resin such as urethane resin,
A thermosetting resin film is formed. A colorant and other additives can be appropriately added to the thermosetting resin such as urethane resin. The application method is spraying, brushing,
Appropriate methods such as dobu-zuke can be adopted. The drying method may be natural drying or forced drying. The coating can be performed at any time after the vicinity of the exit of the annealing furnace in the glass bottle manufacturing process. Further, a coating liquid containing a saccharide and / or a derivative thereof is coated on this coating film. The concentration of the saccharide and / or its derivative is suitably about 0.01 to 3.0% in the case of sodium salt of CMC (carboxymethyl cellulose) or sodium alginate. Further, a thermoplastic resin such as polyethylene resin may be added to the coating liquid in an appropriate amount. A suitable concentration of the thermoplastic resin is about 0.1 to 0.5%. As a method of applying the coating liquid, a spraying method, a brush coating method, a dobu pickling method, or the like can be appropriately used. The drying method may be natural drying or forced drying.

After applying the heat-sensitive label, a hydrophobic coating agent is applied to further improve the water resistant adhesive strength. The hydrophobic coating agent may be a hydrophobic material such as resin, silicone, fats and oils. When a thermoplastic resin such as polyethylene is used as the hydrophobic coating agent, its concentration is preferably about 0.1 to 0.5%. As a coating method, a spraying method, a brush coating method, a pickling method, or the like can be appropriately used. The drying method may be natural drying or forced drying.

In the present invention, the thermosetting resin coating formed on the outer surface of the glass bottle imparts slipperiness and shock absorption to the glass bottle and prevents the glass from being damaged. Further, hydrophilicity is imparted by the coating film containing the saccharide and / or its derivative, and the water-resistant adhesive strength of the heat-sensitive adhesive of the heat-sensitive label is improved. Further, by applying a hydrophobic coating agent, the water resistant adhesive strength is further improved.

After applying the heat-sensitive label, a hydrophobic coating agent is applied to further improve the water-resistant adhesive strength. The hydrophobic coating agent may be any hydrophobic material such as resin, silicone, fats and oils, and the application method can be appropriately selected from spraying, brush coating, dobbing, and the like. The drying method may be natural drying or forced drying.

The sugars and their derivatives in the present invention are, for example, as follows. 1. Monosaccharides arabinose, xylose, ribose, glucose, mannose, galactose, fructose, dioxyacetone, ketotreose, erythro-2-ketopentose, threo-2-ketopentose, fructose, tagatose, psicose, sorbose, glycerose, erythrose, threose, arabinose, 1. Lyxose, allose, altrose, gulose, idose, talose, etc. Oligosaccharide maltose, cellobiose, trehalose, gentiobiose, isomaltose, lactose, sucrose, raffinose, gentianose, stachyose, etc. 3. Polysaccharides pentosan, xylan, araban, cellulose, starch, glycogen, dextran, fructan, inulin, levan, galactan, mannan, alginic acid, etc. Glycosides amygdalin, arbutin, indican, carsamine,
Quercitrin, salicin, cyanine (anthocyan),
Dichitonin (saponin), phlorizin, hesperidin,
Luperitrin, etc. 5. 5. Amino sugar glucosamine (chitosamine), galactosamine (chondrosamine), chitin, chondroitin sulfate, hyaluronic acid and salts thereof, etc. Salt carboxymethyl cellulose salt, alginate, etc. 7. 7. Ether hydroxyethyl cellulose, hydroxypropyl cellulose, methyl cellulose, ethyl cellulose, carboxyethyl methyl cellulose, etc. Ester propylene glycol alginate, sodium starch glycolate, sodium starch phosphate, sucrose fatty acid ester, sorbit (sorbitol), sorbitan fatty acid ester, polyoxyethylene sorbitan fatty acid ester, etc. Inorganic acid ester Robinson ester, Cori ester, har
den-young ester, neuberg ester, adenylic acid, etc.

The heat-sensitive adhesive of the heat-sensitive label is a thermoplastic resin that imparts tackiness and adhesiveness by heating, a tackifier that improves tackiness, a solid plasticizer that melts by heating and develops tackiness in the tackiness agent. Consists of. Although the thermoplastic resin is not particularly limited, it is composed of an ethylene / (meth) acrylic acid ester copolymer, an ethylene / (meth) acrylic acid ester copolymer and a silane graft modified product of an olefinic polymer having an epoxy group. Polymer composition, ethylene-
Vinyl acetate copolymer and the like. In addition, other additives such as tackifiers and solid plasticizers are not limited and known compounds,
The composition can be used.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION Example: A tin oxide coating was applied at the hot end, and further, after the cold end, a urethane type main agent 100 and a melamine type curing agent 1
4, soft additive (trimethoxysilane) 0.5, silicon-based leveling agent 0.4, defoaming agent (wax, natural resin) 0.15, dipping filled with coating liquid consisting of pure water 10 by weight mixing ratio After dipping the glass bottle in the layer and applying the coating liquid to the outer surface of the glass bottle,
The coating liquid was dried at 0 ° C (using hot air and a far infrared heater), and the thermosetting resin was cured in a curing oven at 180 ° C to form a thermosetting resin film on the entire outer surface of the glass bottle. Next, 0.05 wt% of CMC (carboxymethyl cellulose) sodium salt was dissolved in water to disperse 0.1 wt% of polyethylene and 0.1 wt% of cellulose on the outer surface of the glass bottle at a temperature of 80 to 120 ° C. The coating liquid thus prepared was applied by spraying and then naturally dried at room temperature to form a coating film containing CMC and polyethylene on the thermosetting resin film. Next, a heat-sensitive label is attached on this coating film, and a coating solution in which 0.4 wt% polyethylene is dispersed in water is applied by spraying to cover the label (hydrophobic coating), and then naturally dried at room temperature. Then, the glass bottle of the example was prepared.

Comparative Example: A thermosetting resin film was formed on the outer surface of a glass bottle and a coating film containing CMC and polyethylene was formed on the outer surface of the glass bottle in the same manner as in the above example, and a heat-sensitive label was attached on the coating film. Then, a glass bottle of a comparative example was prepared.

The adhesive strength of each of the three glass bottles of Examples and Comparative Examples after immersion in normal temperature water (20 ° C.) for 24 hours was measured. For this adhesive strength, the label was cut into a width of 15 mm, the end was pinched with a push-pull gauge and pulled up in a direction substantially perpendicular to the glass surface, and the maximum tension at that time was measured. The average value of the adhesive strength is 1.73 N in the example,
The comparative example is 0.80 N, and the example is about 2.
It had double the adhesive strength.

[0021]

The glass bottle of the present invention is a glass bottle in which a heat-sensitive label is applied on a cold end coating of a conventional thermosetting resin, or a saccharide and / or a derivative thereof on a coating of a thermosetting resin. Water resistant adhesive strength is significantly improved compared to glass bottles coated with a coating solution containing a heat-sensitive label, so they can withstand the bottle bottle cleaning process and do not peel off. Can be used as

Claims (3)

[Claims] 1. An outer surface is coated with a coating liquid containing a thermosetting resin and a saccharide and / or a derivative thereof, and a heat-sensitive label is attached on the coating film, and a hydrophobic label is further applied on the label. A glass bottle with a heat-sensitive label characterized by applying a coating agent 2. A thermosetting resin coating formed on the outer surface is coated with a coating liquid containing a saccharide and / or a derivative thereof, and a heat-sensitive label is attached on the coating, and further thereon. A glass bottle with a heat-sensitive label characterized by being coated with a hydrophobic coating agent. 3. A thermosetting resin coating formed on the outer surface is coated with a coating liquid containing a saccharide and / or its derivative and a thermoplastic resin, and a heat-sensitive label is attached on the coating. Further, a glass bottle with a heat-sensitive label, characterized in that a hydrophobic coating agent is applied on the glass bottle.