JPH11129380A - Laminated tube container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a laminated tube container obtained by forming a body of a laminated material without separately providing a film for providing a print layer with good reproducibility of the print layer. SOLUTION: The laminated container is obtained by forming a body of a laminated material having an outer surface layer 10 made of a thermoplastic resin having a heat sealability and an inner surface layer 11 provided on both side surfaces of a raw material having a protective layer 5 provided on one side surface of a base material 1 made of a plastic film via a metal oxide deposited layer 2, a coating layer 3 and an adhesive layer 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a laminated tube container having a body made of a plastic film provided with a metal oxide deposited layer.

[0002]

2. Description of the Related Art Representative examples of a laminated material constituting a body of a laminated tube container include: (Structure 1) PE film / PE layer / (printing layer) milky white PE
Film / PE layer / silicon oxide evaporated PET film / adhesive layer / LLDPE (Constitution 2) PE layer / PE layer / (printing layer) Milky white PE film / adhesive layer / EVOH film adhesive layer / milk white LLD
PE / PE layer / milk white LLDPE film (Structure 3) PE film / PE layer / PET film (printing layer) / PE layer / milk white PE film / aluminum oxide evaporated PET film / PE layer / PE layer.
The above PE is low density polyethylene, PET is polyethylene terephthalate, and LLDPE is linear low density polyethylene.

As described above, in a laminated structure including a barrier layer, a printing layer for displaying contents and the like is generally provided outside the barrier layer. In the case of a configuration in which a printing layer is provided on the front side of a film such as milky white PE as in the configurations 1 and 2, when the sides are sealed by heat and pressure to form the body of the tube container, the milky white PE becomes In some cases, it protruded in a streak shape, causing inconvenience in appearance. In the case of the configuration 3, since a print layer is provided on the back surface of a film such as PET outside the barrier layer, printing with excellent reproducibility is possible. However, a film for forming a print layer must be separately provided. Did not.

[0004]

SUMMARY OF THE INVENTION The present invention relates to a laminate having a body having a structure in which a print layer having excellent reproducibility equivalent to PET or the like can be provided and a film for forming the print layer is not separately used. It is intended to provide a tube container.

[0005]

According to the present invention, a printing layer is provided on a metal oxide vapor-deposited layer of a substrate on which the metal oxide vapor-deposited layer is formed.
A laminated tube container comprising a body having a material in which a protective layer made of a plastic film is laminated on the printed layer via an adhesive layer.

Further, the present invention is a laminate tube container characterized in that a coating layer is formed on the metal oxide vapor deposition layer. Further, the present invention is the laminate tube container, wherein the coating layer comprises a coating agent containing a water-soluble polymer and a metal alkoxide or a hydrolyzate thereof.

The present invention also provides a laminate tube container, wherein the protective layer is made of a biaxially stretched plastic film. Further, the present invention is the laminated tube container, wherein the protective layer is made of a colored plastic film.

Further, the present invention is a laminate tube container characterized in that a surface layer is formed on the outside of a material and an inner layer is formed on the inside in contact with the contents. Further, in the present invention, the ratio of the thickness of the surface layer to the thickness of the inner layer is from 1: 1 to 1: 3.
The laminate tube container is characterized in that the range is as follows.

[0009]

FIG. 1 is a cross-sectional view of a laminated material constituting a body of a laminated tube container according to the present invention, wherein 1 is a base material made of a plastic film, and 2 is a metal oxide or the like deposited thereon. Reference numeral 3 denotes a printing layer, 4 denotes an adhesive layer, and 5 denotes a protective layer made of a plastic film. And
Surface layer 1 made of thermoplastic resin having heat sealing properties on both sides of the plastic film 1 and the protective layer 5
0, the inner layer 11 is provided. FIG. 2 is a cross-sectional view showing another configuration, which is a laminated material for forming a body provided with a coating layer 7 on the surface of the vapor-deposited layer 2 of the laminated material of FIG.

A substrate 1 made of a plastic film is
A stretched film is preferably a film having mechanical strength, specifically, a film made of polyethylene terephthalate, polyamide, or polypropylene. Known additives such as, for example, an antistatic agent, an ultraviolet absorber, a plasticizer, a lubricant, and a coloring agent can be added to the plastic film, and are appropriately added as necessary.

The vapor-deposited layer 2 made of a metal oxide is composed of a simple substance of an oxide such as silicon, aluminum, titanium, zirconium or tin, or a composite thereof, and is formed by a vacuum deposition method.
It is formed by a vacuum process such as a sputtering method and a plasma vapor deposition method (CVD method). The thickness of the metal oxide vapor-deposited layer 2 is in the range of 100 ° to 2000 ° for transparency,
Barrier properties are suitable.

The coating layer 7 provided on the surface of the vapor-deposited layer 2 includes a water-soluble polymer and an aqueous solution containing at least one of (a) one or more metal alkoxides and hydrolysates thereof, and (b) tin chloride. Alternatively, it comprises a coating agent mainly composed of a water / alcohol mixed solution. Coating a solution prepared by dissolving a water-soluble polymer and tin chloride in an aqueous solvent (water or water / alcohol mixture), or a solution prepared by mixing a metal alkoxide directly or pre-hydrolyzed , Heated and dried. Each component contained in the coating agent will be described in detail below.

The water-soluble polymer used for the coating agent in the present invention includes polyvinyl alcohol, polyvinylpyrrolidone, starch, methylcellulose, carboxymethylcellulose, sodium alginate and the like. In particular, when polyvinyl alcohol (PVA) is used as the coating agent for the gas barrier laminate of the present invention, the gas barrier properties are most excellent. The PVA referred to here is generally obtained by saponifying polyvinyl acetate, and ranges from so-called partially saponified PVA in which acetic acid groups remain tens of percent to fully saponified PVA in which only a few percent of acetic acid groups remain. Including
There is no particular limitation.

Further, the metal alkoxide may be a general formula such as tetraethoxysilane [Si (OC ₂ H ₅ ) ₄ ], triisopropoxy aluminum [Al (O-2′-C ₃ H ₇ ) ₃ ], M (OR) _n (M: metal such as Si, Ti, Ai, Zr, R: CH ₃ ,
(An alkyl group such as C ₂ H ₅ ). Among them, tetraethoxysilane and triisopropoxyaluminum are preferable because they are relatively stable in an aqueous solvent after hydrolysis.

Each of the above-mentioned components can be added to the coating agent alone or in combination of several components. Further, as long as the barrier properties of the coating agent are not impaired, isocyanate compounds, silane coupling agents, dispersants, and stabilizers Known additives such as a viscosity modifier and a colorant can be added.

For example, an isocyanate compound to be added to a coating agent has two or more isocyanate groups (NCO groups) in its molecule, such as tolylene diisocyanate (TDI), triphenylmethane triisocyanate (TTI), There are monomers such as tetramethylxylene diisocyanate (TMXDI), and polymers and derivatives thereof.

As a method for applying the coating agent, conventionally known means such as a dipping method, a roll coating method, a screen printing method, and a spray method are used. Although the thickness of the coating layer 7 varies depending on the type of the coating agent, the thickness after drying may be in the range of about 0.01 to 100 μm. When the thickness is 50 μm or more, cracks are easily generated in the film. It is desirable that the thickness be from 0.01 to 50 μm.

The protective layer 5 is formed by the deposition layer 2 or the coating layer 7
Is provided with an adhesive layer 4 interposed therebetween, and is not particularly limited as long as it is a plastic film, but a stretched plastic film such as polyester, nylon, or polypropylene, or an LLDPE film is preferable.

The surface layer 10 and the inner layer 11 are
Any resin having heat sealing properties, such as low-density polyethylene, linear low-density polyethylene, and polyethylene, polypropylene, and ethylene copolymer synthesized using a metallocene catalyst, can be used according to the purpose. Also,
The surface layer 10 is made of a resin to which an antistatic agent is added so that the surface layer 10 is transparent and located outside so that dust and the like do not adhere thereto. Is preferred.

The inner surface layer 11 is in contact with the contents,
The protective layer 5 is provided by extrusion-coating a film or a molten resin via an adhesive or molten polyethylene. The inner surface layer 11 may be selected according to the purpose, either transparent or colored resin, or a combination of these resins.

The outer layer 1 is made of a laminated material for forming the body.
0 is in the range of 70 to 150 μm,
The thickness of 1 is preferably in the range of 1 to 3 times the outer surface layer 10, specifically in the range of 150 to 350 μm.

[0022]

According to the present invention, which has the above constitution, a printing layer is provided on a vapor-deposited layer in which a metal oxide is vapor-deposited on a substrate or a coating layer provided on the vapor-deposited layer, and the printed layer is formed of a plastic film. Since a material laminated with a protective layer composed of a plastic film is used, printing with the same reproducibility as that of a plastic film can be performed, and another plastic film may not be used to provide a print layer.

Further, since no milky white polyethylene film is provided on the outside of the gas barrier material, the milky white polyethylene may protrude in a streak shape to the outside even if sealed by hot pressure when forming the body, which may impair the appearance. There is no.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a laminated material forming a trunk of the present invention.

FIG. 2 is a cross-sectional view showing another laminated material forming the body of the present invention.

FIG. 3 is a cross-sectional view showing a conventional state of sealing a body portion.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Base material 2 ... Deposition layer 3 ... Printing layer 4 ... Adhesive layer 5 ... Protective layer 7 ... Coating layer 10 ... Outer surface layer 11 ... Inner surface layer

Claims (7)

[Claims] 1. A cylinder having a material in which a printing layer is provided on a vapor-deposited layer of a substrate on which a metal oxide vapor-deposited layer is formed, and a protective layer made of a plastic film is laminated on the printed layer via an adhesive layer. A laminated tube container comprising: 2. The laminated tube container according to claim 1, wherein a coating layer is formed on the metal oxide deposited layer. 3. The laminated tube container according to claim 2, wherein the coating layer comprises a coating agent containing a water-soluble polymer and a metal alkoxide or a hydrolyzate thereof. 4. The laminated tube container according to claim 1, wherein the protective layer comprises a biaxially stretched plastic film. 5. The laminated tube container according to claim 1, wherein the protective layer is made of a colored plastic film. 6. A material according to claim 1, wherein a surface layer is formed on the outer side of the material, and an inner surface layer in contact with the contents is formed on the inner side.
A laminated tube container according to any one of claims 5 to 7. 7. The thickness ratio of the surface layer to the inner layer is from 1: 1 to 1: 1.
The laminate tube container according to claim 6, wherein the ratio is set to 1: 3.