JPH0410205Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Industrial application field] The present invention relates to solid alcohol fuel packaging.

[Conventional technology]

Solid alcohol fuel has traditionally been packaged in metal cans. In particular, solid alcohol fuel is often used outdoors such as hiking and mountain climbing.
Metal can packaging is heavy, empty cans are too bulky to take home after use, and are left in the place where they were used, causing pollution, so it is recommended to replace can packaging with plastic film or other bag packaging. desired.

[Problems to be solved by the invention] However, plastic film has drawbacks such as evaporation of alcohol and penetration of moisture from the outside, and the disadvantage that solid alcohol fuel cannot be stored for a long period of time.

An object of the present invention is to provide a solid alcohol fuel packaging body made of lightweight plastic film that is free from problems such as evaporation of alcohol and penetration of moisture from the outside.

[Means to solve the problem]

In order to solve the above problems, the inventors of the present invention have studied and
We discovered that there are differences in moisture permeability and alcohol permeability depending on the material of the film, and that some films only have particularly low moisture permeability or only alcohol permeability, and finally arrived at the present invention.

That is, the present invention provides a solid alcohol fuel package wrapped in a film, in which a nitrile resin film and a low moisture permeability film are used as the film, and a nitrile resin film is used on the inside that is in contact with the solid alcohol fuel. This is a solid alcohol fuel packaging body characterized by using a low moisture permeability film on the outside.

The solid alcohol fuel referred to in this invention is one made by solidifying alcohol such as methanol or ethanol with soap, surfactant, polyvinyl acetate, etc., and any solid alcohol fuel may be used. good. In addition, for handling purposes, the preferred shape is one placed in a cup-shaped aluminum foil.

The nitrile resin film used in the present invention is a film made from a resin containing 50% by weight or more of unsaturated nitrile units such as acrylonitrile and methacrylonitrile, and the resin is a diene rubber. Preferably, an unsaturated nitrile is graft copolymerized with an acrylic acid ester, styrene, or the like. Further, the appropriate thickness of the film is about 10 to 500 μm, preferably about 20 to 200 μm.

The low moisture permeability film used in the present invention preferably has a moisture permeability (according to JIS Z-0208) of 20 g/
If the moisture permeability is higher than ^this , water will enter the interior through the film during storage and moisten the solid alcohol fuel, making long-term storage difficult. Such films include polyolefin resins such as polypropylene and polyethylene with a thickness of 20 to 100 μm.
There are several films that can be mentioned.

In the present invention, it is preferable to use a nitrile resin film and a low moisture permeability film in a layered manner, and in order to improve mutual adhesion, packaging suitability, film strength, printability, etc., three layers are further layered with other resins or metals. It is also possible to have multiple layers. Further, by forming a laminated film, the total thickness of each film can be made thinner than when using a single layer, and packaging is also required only once, which is preferable. Examples of multilayer films are AN/PP, AN/LDPE, AN/
PP/nylon, AN/PP/PET, AN/
Examples include LDPE/nylon, AN/LDPE/nylon, etc. (AN stands for nitrile resin, PP stands for polypropylene, LDPE stands for low density polyethylene, and PET stands for polyethylene terephthalate).

The film of the present invention can be manufactured by conventionally known methods, and the multilayer film can be manufactured by dry lamination, coextrusion, adhesion, etc.

The present invention will be explained below with reference to the drawings.

1 and 2 are cross-sectional views of a solid alcohol fuel package according to the present invention.

The solid alcohol fuel 1 is usually housed in an aluminum foil 2, and one or more of these are wrapped in a nitrile resin film 3 and a low moisture permeability film 4 in that order from the inside.

In addition, if the nitrile resin film is on the outside and the low moisture permeability film is directly packaging the solid alcohol fuel, the alcohol generated from the solid alcohol fuel will be trapped between the low moisture permeability film and the nitrile resin film. Moisture in the outside air accumulates during storage, and especially in laminated films, alcohol and water penetrate the bonded areas between layers, corroding the bonded areas and causing devitrification or peeling, reducing commercial value.

〔Example〕

The present invention will be explained below with reference to Examples.

Example 1 Nitrile resin “Barex 210” manufactured by Sohio Chemical (trademark, acrylonitrile content 70wt%)
A film with a thickness of 30 μm and a film with a thickness of 30 μm
A bag with a width of 80 mm and a length of 200 mm was made using a film laminated with biaxially oriented polypropylene film (OPP) with the Barex 210 side inside. Five pieces (20g, methanol content: 95wt%) were placed in the container, and the upper part was heat-sealed.

This thing was kept at 40℃ with relative humidity of 0% and 90%.
The solid alcohol fuel was stored in a constant temperature and humidity chamber for 3 months, and the weight change (relative to fuel) and the water content in the solid alcohol fuel (by Karl Fischer method) were measured.

The results are shown in Table 1.

Comparative example 1 Example 1 except that the barrex 210 side is outside
repeated.

The results are shown in Table 1.

Comparative Examples 2 and 3 Example 1 was repeated except that only the film used for lamination in Example 1 was used.

The results are shown in Table 1. Comparative Example 2 uses only a film of Barex 210, and Comparative Example 3 uses a biaxially stretched polypropylene film.

Example 2 Example 1 was repeated except that a film of Bareik 210 and a biaxially oriented polypropylene film were used separately and in this order for packaging.

The results are shown in Table 1.

Example 3 Example 1 was repeated except that a 15 μm thick nylon film (Ny) was further laminated onto the biaxially stretched polypropylene film of the laminated film of Example 1.

The results are shown in Table 1.

Comparative Example 4 Example 1 was repeated except that a film obtained by laminating the biaxially oriented polypropylene film used in Example 1 and the nylon film used in Example 3 was used.

The results are shown in Table 1.

[Effect of idea]

The solid alcohol fuel package of the present invention has good storage stability because the solid alcohol fuel is packaged using a nitrile resin film on the inside and a low moisture permeability resin film on the outside, and there is no increase in weight loss or moisture content. In addition, since devitrification of the film due to water and alcohol is prevented, solid alcohol fuel can be easily confirmed.

[Brief explanation of drawings]

1 and 2 are sectional views showing an embodiment of the present invention. The symbols in the figure are as follows. 1 is solid alcohol fuel, 2 is aluminum foil, 3 is nitrile resin film, and 4 is low moisture permeability film.

【table】

Claims (1)

[Claims for Utility Model Registration] 1. A solid alcohol fuel package wrapped in a film, in which a nitrile resin film and a low moisture permeability film are used as the film, and
A solid alcohol fuel packaging body characterized by using a nitrile resin film on the inside that is in contact with the solid alcohol fuel and using a low moisture permeability film on the outside. 2. The solid alcohol fuel package according to claim 1, which is a multilayer film in which a nitrile resin film and a low moisture permeability film are laminated.