JPS59174470A - Packing bag preventing degeneration of content - 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 This invention relates to packaging that prevents deterioration and maintains its quality.

In recent years, advances in packaging materials have led to packaging liquid foods in plastic containers and paper-plastic composite containers instead of traditional bottles and cans. Along with this, deterioration of food flavor, which has not been a problem with conventional solid foods, has become a problem. For example, alcoholic beverages such as sake and wine where flavor is important, fruit juice beverages such as orange juice, and soups are particularly sensitive to flavor deterioration.

Conventionally, it has been thought that the deterioration of liquid food flavors is due to the transfer of off-flavors from plastic containers to the food, and studies have been conducted to prevent the occurrence of off-odors. In the course of this study, one factor has been raised as a factor contributing to the odor of plastic containers. One element is the transfer of residual solvents (ethyl acetate, methyl ethyl ketone, ethyl alcohol, toluene, etc.) from printing, ink and adhesives applied to containers to food products (which come in direct contact with food). This is a transition. Polyolefin resin is mainly used for this heat seal layer. As a measure to reduce the odor of the heat-seal layer, attempts have been made to reduce the amount of residual solvent, and research on methods for reducing the odor of the heat-seal layer has been progressing, and considerable results are currently being obtained in these areas.

However, even when packaging materials employing these odor reduction methods are used, flavor deterioration has been observed in some liquid foods where flavor is important.

As a result of further research, the present inventor found that food flavors were adsorbed to the heat seal layer. In other words, it was discovered that some of the volatile compounds that make up food flavors are adsorbed to the heat seal layer of the packaging material, disrupting the flavor balance of liquid foods.

In order to maintain this balance, food flavor components that are easily adsorbed to the heat seal layer are mixed in in advance to saturate the adsorption sites of the heat seal layer, and when kneading the ingredients, I! rOc
This requires higher temperatures than above, and for this reason, fragrances with low boiling points cannot be kneaded, and fragrances with high boiling points are also processed at high temperatures, so some of them volatilize, so in reality, a larger amount than is required for practical use is blended. I needed to.

As a result of research, the present inventor has developed a heat-sealable layer made of polyolefin resin containing a flavoring agent without high-temperature heating, in order to minimize the adsorption of food flavors when packaging foods. The inventors discovered that the desired objective could be achieved by providing a coating layer of a polyolefin resin dispersion containing food flavorings on the surface of a polyolefin resin film, and based on this knowledge, the present invention was completed. .

That is, the gist of the present invention is a laminated material comprising a single-layer or multi-layer heat-resistant thermoplastic resin film, a barrier film on one side, and a dispersion coating layer of a polyolefin resin film, to which a food flavoring agent is added. This packaging bag is characterized in that the bag is made so that the surface of the coated layer of polyolefin resin dispersion is on the inside, thereby preventing the contents from deteriorating.

Hereinafter, the present invention will be explained in detail.

FIG. 1 is a perspective view showing one example of the packaging bag of the present invention, and FIG. 1 is a sectional view of a laminated material constituting the packaging bag of the present invention.

The packaging bag of the present invention (the power is a single-layer or multi-layer heat-resistant thermoplastic resin film (1) with a barrier film (2) on one side)
and a polyolefin resin film (4) are sequentially laminated, and a coating layer (5) of a polyolefin resin dispersion added with a food flavoring agent is provided on the surface of the polyolefin resin film (4). The bag is made so that the coating layer (5) of a polyolefin resin dispersion containing food flavoring is on the inside. In the figure, (3) indicates an adhesive layer.

Accordingly, in the present invention, α-
Food flavoring agents such as limonene, α-pinene, β-pinene, myrcene, linalool, citronellal camphene, and octanal are added to low-density polyethylene, ethylene-α-olefin copolymer, ethylene-vinyl acetate copolymer, ethylene-acrylic Dispersions of polyolefin resins such as acid copolymers, ionomers, and other ethylene copolymers can be used. The dispersion can be applied by air knife coating, gravure coating, roll coating, etc. The amount of dispersion applied is small o, Jf/rr? is required, and generally preferred is lf-/rrl to /Of/@'.

Adsorption properties to polyolefin resins vary depending on the food flavor components.

Therefore, in order to retain a scent similar to each food flavor even after filling, it is more effective to adjust the ratio of each flavor component to be blended according to their adsorption properties.

Therefore, it is more preferable to selectively blend fragrance components that are easily adsorbed onto the polyolefin resin. For example, Octanal's new +A! contains many new oil-based fragrance ingredients such as terpene hydrocarbons such as α-limonene and benzene rings. 1-Kagoru 11-Nato 1
It is also possible that r1Δ1if.

In the present invention, a method is adopted in which a polyolefin resin dispersion containing a food flavoring agent is applied to form a heat seal layer containing a food flavoring agent. This is because a sealing layer can be formed.

On the other hand, although it is possible to simply apply a perfume solution to a polyolefin resin, it is difficult to apply a large amount, and a heat-sealing layer containing a sufficient perfume cannot be formed.

Next, in the present invention, as the polyolefin resin film to which the dispersion is applied, low density polyethylene, medium density polyethylene, high density polyethylene, ethylene-α olefin copolymer, ethylene-vinyl acetate copolymer, ionomer, other ethylene Copolymers, polypropylene, etc. may be used.

Next, in the present invention, a polyester film, a polycarbonate film, an aluminum foil, a polypropylene film coated with vinylidene chloride, an aluminum vapor-deposited film is used as a barrier film to be laminated on the outside of the polyolefin resin film kneaded with a food flavoring having a boiling point of /107: or more. Stretched polyamide or the like can be applied. The purpose of laminating this barrier film is to prevent the food flavor from volatilizing after the food is filled, and to prevent the blended flavor from volatilizing from the packaging bag before the food is filled. It is necessary to maintain the balance of food flavor for a long time.

Next, biaxially oriented polyester,
Unstretched nylon, biaxially stretched nylon, unstretched polypropylene, unstretched polyethylene, polyvinylidene chloride, or a laminated film thereof can be used.

Representative examples of the form of the packaging bag of the present invention include a self-supporting bag and an inner bag of a bag-in-box.

As described in detail above, the packaging bag of the present invention has the effect of preventing food flavors from deteriorating while hardly adsorbing food flavors.

Next, the present invention will be specifically explained with reference to Examples.

Example 1 Low density polyethylene film (Balance IGP.

Made by Mitsui Polychemical ■) l: Aluminum foil (9μ) on the outside of θμ, and stretched polypropylene film (,io
μ) were laminated via an isocyanate adhesive. α-limonene is added to the low-density polyethylene film side of this laminated film! Roll coat an ethylene-vinyl acetate copolymer emulsion (trade name: Chemivar) containing f%,
! ? /d coated. The drying temperature is 1 hour and 10 seconds. This low-density polyethylene film was treated with a corona treatment beforehand to improve its adhesion to the emulsion.

A stand-up pouch - a self-supporting bag was made using a laminated film coated with cono-α-limonene. (Size/90□□□X/00 on) After storing 100 cc of this medium orange juice for 10 days, a sensory test was conducted.

Comparative example 1 Low density polyethylene film (balanced polyethylene film).

Aluminum foil (9μ) and stretched polypropylene film (-20μ
) were laminated using an isocyanate adhesive. Roll coat an ethylene-vinyl acetate copolymer emulsion (trade name: Chemipearl) on the low-density polyethylene film side of this laminated film. / I coated it. The drying temperature is
rOC1 hour IO seconds. This low density polyethylene film was previously treated to 4'0dyne/1yrt.

Using this laminated film, a stand pouch--a self-supporting bag was made.

(Size/90anX/00cm) 100ct of orange juice was put into this and stored for 70 days, and then a sensory test was conducted.

Comparative Example A stretched polypropylene film (-〇μ) was laminated on the outside of a low-density polyethylene film (Mirason/ffp1 manufactured by Mitsui Polychemical Co., Ltd.) with an incyanate adhesive interposed therebetween. The low-density polyethylene film side of this laminated film was coated in the same manner as in Example 1 to produce a stand pouch-self-supporting bag. (Size/90(
(to)

Sensory test results>

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing seven examples of the packaging bag of the present invention, and FIG. 2 is a sectional view of a laminated material constituting the packaging bag of the present invention. (1)・・・Heat-resistant thermoplastic resin film (2)・
・0・Barrier film (4)----Polyolefin resin film (5)
... Patent applicant for coating layer of polyolefin resin dispersion containing food flavoring agent Atsumi Konishi, patent attorney representing Dai Nippon Printing Co., Ltd.

Claims (1)

[Claims] A barrier film and a polyolefin resin film are sequentially laminated on one side of a single-layer or multilayer heat-resistant thermoplastic resin film, and a polyolefin resin deshertion coating layer containing food flavoring is provided on the surface of the polyolefin resin film. A packaging bag which prevents the contents from deteriorating, characterized in that the bag is made of a laminated material made of laminate and is made so that the coated layer of polyolefin resin dispersion added with food flavoring is on the inside.