JPS591348A - Vessel with spout, adhesive strength thereof is controlled - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] In recent years, containers for liquids or powders such as milk, alcohol, salt, etc.
Sealed containers made of paperboard with a layer of plastic resin such as polyethylene are used.

Since this container is formed by thermocompression bonding, the spout is also strongly bonded. Therefore, a considerable amount of force is required to open the container, and there are disadvantages such as damage to the spout and the unsightly portion of the spout, and paperboard scraps getting mixed into the contents. In order to improve this drawback, use an organic solvent bath liquid such as polysiloxane, cyclized rubber and a trace amount of polysiloxane, cyclized rubber and aromatic, ketone, ester, etc. Attempts have been made to control the adhesion force by coating (for example, Japanese Patent Publication No. 44-15076, Japanese Patent Publication No. 51-30831, and Japanese Patent Publication No. 51-35466).

However, there remain problems such as the residual aromatic and other organic solvents mentioned above may impair the taste, especially when the content is food, and the ability to control adhesive strength is insufficient. Ta.

The present invention was completed through research to solve the above problems, and is a container made of paperboard with thermoplastic resin layers on the inner and outer surfaces. The purpose of the present invention is to provide a container having a pouring spout whose adhesive strength 'r is sub-controlled, which is characterized by being coated with an alcohol-soluble heat-resistant resin film at the desired location.

The alcohol-soluble heat-resistant resin toshite in the present invention is
Cellulose resins such as nitrocellulose, polyvinyl ether, maleic acid resins, butyral resins, ketone resins, phenolic TFF4 resins, alkyd resins, polyurethane resins, polyamide resins, etc. are used alone or in combination. In particular, nitrocellulose, butyral resin, and alkyd resin are preferred from the viewpoint of workability.

These resins have a melting point of 5
It is preferable to select from those having a high melting point of 0°C or higher, preferably 100°C or higher.

These resins are prepared as a solution in an alcoholic solvent with a solid content of 10 to 40% by weight, preferably 15 to 30% by weight, and applied by printing to the area to be used as the spout. This solution contains fatty acid wax, polyethylene wax,
0% by weight or less, 5% by weight of organoborin loxane etc.
The following can be added in a dissolved or finely dispersed state.

In order to apply the above-mentioned resin solution to the mouth of the container, a printing method or a coating method known per se can be applied, such as a gravure coater, a flexo coater, a roll coater, and the like. The amount applied varies depending on the ingredients, but the dry amount is 0.5 to 59/lr.
? , preferably 1.5 to 3.597 m''.

The container according to the present invention has improved hygiene and odor, and has a peel strength of 0.05 to 0.15 Kf at the mouth.
/ It can be adjusted so that the crl can be easily peeled off.

EXAMPLES The present invention will be specifically explained below with reference to Examples. The middle part of the example shows parts by weight.

Example 1 A resin composition having each of the following formulations was applied to a paperboard sandwiched with polyethylene and dried to a film thickness of about 2.5 mm.
Of/n? with a resin film.

A paperboard sandwiched with other polyethylene was superimposed on this resin film surface at 230°C, 40 bonds/cA.
The bonding was carried out under heat and pressure for 3 seconds.

This peel strength was measured by a T peel test. There was no damage to the paperboard during peeling.

Formula 1 Nitrocellulose 10 parts Butyral resin 2 Alkyd resin 14# Ethanol 40 Methanol 24# Ethyl cellosolve 10 Peel strength 0.10 Kg/crl Recipe 2 Nitrocellulose 10 parts Urethane resin 10 Castor oil 0.5 ethanol
50 〃 Methanol 19.5# Kochiru Seven Day Solve 10 〃 Peel strength 0.11? /ca Prescription 3 Butyral resin 10 parts Polyamide 1 fat 10 parts Ethanol
10 N-gropanol 40 Butyl cellosolve 5 Antifoaming agent 0.5 Isopropanol 24.5# Peel strength 0.07 Kg/lri Formula 4 Nitrocellulose 10 parts Alkyd resin 10 Butyral resin 5 Polyethylene wax 2 Dimethylpolysiloxane 0.01 Methyl cellosolve 10 Methanol 23 Ethanol 40 Peel strength 0.08 K9/crl Formula 5 Nitrocellulose 20 parts Alkyd resin 10 Urethane resin 5 parts Polyethylene wax 2 Lentin
0.1〃Methyl cellosolve
10 Methanol 13 I Ethanol 40 Peel strength 0.10 Kg/crl Formula 6 Polyamide resin 20 parts Nitrocellulose 7 Polyethylene wax 2 Fatty acid wax 1.5 Butyl cellosolve
5 〃 n-propatool 50 # Ethanol 15 〃 Peeling strength 0.08Kg/ca Patent applicant Toyo Ink Mfg. Co., Ltd.

Claims (1)

[Claims] (1) A container made of paperboard with thermoplastic resin layers on the inner and outer surfaces, and when producing the container by thermocompression bonding,
A container having a pouring spout with controlled adhesive strength, characterized in that a portion of the spout is coated with an alcohol-soluble heat-resistant resin film.