JPH11236063A - Standing pouch provided with spout for oil - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a standing pouch which is favorable as a container for oil. SOLUTION: A film material of sides and a bottom of the standing pouch comprises an oxygen barrier film as an intermediate layer, and the inside of the pouch comprises a polyethylene film and the outside thereof comprises a laminated film comprising a polyethylene terephthalate film and/or a nylon film. And the pouch has a spout, which can be resealed, at a top corner cut part thereof. If required, a titanium dioxide layer can be provided between the polyethylene terephthalate film and the nylon film.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a packaging material for oil, particularly edible oil, which is not susceptible to oxidation during storage, and more particularly to a resealing spout at an upper corner cutout. To a standing pouch for oil with a spout.

[0002]

2. Description of the Related Art Conventionally, for example, edible oil has been filled in rigid containers such as glass bottles, metal cans, and plastic bottles. However, in such a container, the cost of the packaging material is increased, and the volume of the packaging material cannot be reduced at the time of disposal.

[0003] Standing pouches with spouts have recently become widely used as containers for edible or non-edible liquids in connection with the recycling process. As is well known, a standing pouch has an advantage that it can be flattened to reduce its bulk before being filled with contents and in an empty state after the contents have been consumed (good disposability). Such advantages lead to various secondary advantages.

[0004] However, standing pouches having such merits also have problems as an oil container, such as securing the storage stability of the oil, the self-sustaining stability of the container, and the convenience of use. There is no example used as a container for legally dangerous oil.

[0005]

SUMMARY OF THE INVENTION Under the background of the above-mentioned prior art, an object of the present invention is to provide a standing pouch excellent in solving the above-mentioned problems, particularly as an oil container.

[Means for Solving the Problems]

As a result of intensive studies to solve the problems described in the preceding paragraph, the present invention has found means for solving the above problems by devising the material (material) of the standing pouch and the function and position of the spout.

That is, the present invention relates to a standing pouch for an oil with a spout, characterized by having a resealable spout at the upper corner cutout, and to an oil in a container filled in such a container in a specific manner. .

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The oil referred to in the present invention is soybean oil, rapeseed oil, corn oil, safflower oil, coconut oil, palm oil, olive oil, castor oil, peanut oil, rice bran oil, sesame oil, cottonseed oil,
Herring oil, sunflower oil, cutting oil, sardine oil, linseed oil,
This refers to animal and vegetable oils, such as corn oil, and other oils that may oxidize during storage at the same flash point. Examples of such oils include polyalcohols such as glycerin, organic acids such as higher fatty acids, esters and ketones thereof, and oils for cosmetic (cosmetic) raw materials. These are all oils as dangerous goods subject to the Fire Service Law.

In order to ensure the storage stability of such an oil, the container must satisfy the following three requirements at the same time. That is, (a) the amount of oxygen in the container after filling with oil and during storage can be minimized, (b)
The oxygen permeability of the container can be below a certain level, and (c) the UV transmission (at 400 nm) can be below a certain level.

In order to satisfy such requirements through the container of the standing pouch, the standing pouch itself must ensure (d) self-standing stability and (e) convenience in use as a container. . In other words, the container has both the rigidity and the flexibility, and has good self-supporting stability, and eliminates anxiety such as the container being bent at the time of use. It must be installed in a suitable location.

FIG. 1 is a conceptual diagram of the standing pouch for oil with a spout of the present invention in a state where the contents are filled.

[0012] All of the above requirements can be all satisfied by such a spouted oil standing pouch of the present invention. Specifically, after filling and storage of the oil content, particularly during storage of the oil,
The dead space or head space of the container can be almost completely eliminated according to the standing pouch of the present invention. Accordingly, oxygen contained in the air in the dead space at the time of filling the oil is 0.0% / g of the filled oil.
It becomes easy to make it 2 ml or less, preferably 0.001 ml or less. In contrast, in conventional containers such as glass bottles, metal cans, and plastic bottles, the headspace containing oxygen increases as much as the oil is poured out as the oil in the contents is poured out. Oxygen in the container where oil still remains increases.

The film material of the pouch (on both sides and bottom) is polyethylene vinyl alcohol film (EV
According to the standing pouch of the present invention, which is a laminated film having an oxygen-barrier film such as an OH film, the oxygen permeability of the container can be reduced to a certain level or less, for example, the oxygen permeability of the entire pouch per gram of oil that can be filled in the pouch. 0.001 ml / day · atm or less, preferably 0.1 ml / day · atm or less.
It is extremely easy to set it to 0005 ml / day / atm.

When ultraviolet rays act on the oil filled in the container, the oil deteriorates in combination with oxygen in the container. In the standing pouch of the present invention, an ultraviolet ray cut agent such as titanium oxide is contained in the laminated film of at least both sides of the material, for example, by providing a layer of an ultraviolet ray cut agent between two certain film surfaces, To cut. In order to provide a layer of an ultraviolet ray cut agent, specifically, as shown in Example 1 to be described later, an ultraviolet ray cut agent is applied to a film surface serving as a base material of a pouch by a gravure printing machine, and then this coated surface is applied. It can be performed by laminating the remaining film. In this way, the ultraviolet light (wavelength 4
(Μm) can be 20% or less, preferably 10% or less.

In order to provide self-standing stability, in the standing pouch of the present invention, the laminated film of the material is:
Laminating a heat-fusible film such as LL polyethylene film on the inside (the surface that becomes the inner surface of the pouch when the pouch is made) with the above-mentioned oxygen barrier film interposed therebetween,
A heat-resistant film such as a stretched polyethylene terephthalate film (PET film) and / or a stretched nylon film is laminated on the outside. L
L-polyethylene film has excellent heat-fusibility, high environmental stress resistance to oils and fats (ie, stress cracking), and extremely high drop impact resistance at low temperatures. In addition, the above-mentioned ultraviolet ray cut agent can be interposed between such a PET film and a nylon film (see Example 1 described later).

By using such a laminated film as a material, the standing pouch of the present invention can be used as a standing pouch having both rigidity and flexibility and good self-sustaining stability, and a sufficient amount of oil which is a dangerous substance under the Fire Service Law. It is possible to obtain a container having excellent distribution resistance and, furthermore, an excellent container free from anxiety such as bending of the container during use.

Further, the position of the spout in the standing pouch of the present invention is not located at the center of the top of the pouch which is generally used in the past, but at the upper corner cutout of the pouch. By doing so, there is an advantage that the packaging can be carried out with a slight modification of the ordinary bag-type filling and packaging machine, and it can be used stably without being bent when used. On the other hand, if there is a spout in the center of the top, the contents will be filled from the spout, and a special packaging machine will be required, which will increase capital investment. In this embodiment, the bag is easily bent and unstable.

The structure of the spout itself is not particularly limited as long as it can be resealable. For example, the spout may have a screw-on cap as a lid. You can, of course, use the inner lid to improve the sealing.

The method for producing the standing pouch for oil with a spout of the present invention is not particularly limited, and can be appropriately adapted to a known method.

Further, referring to the examples described later, or conducting some preliminary tests as necessary, a laminated film is formed. The appropriate material type and thickness of each film, the order of lamination, It is also very easy for those skilled in the art to control the oxygen permeability of the entire pouch or the ultraviolet light transmittance on the side surface of the pouch to a desired range by selecting an ultraviolet absorber.

It is also understood by those skilled in the art that the standing pouch for oil with a spout of the present invention is filled with oil so as to have a desired amount per gram of oil filled with oxygen contained in the air in the headspace. This can be done very easily from simple calculations.

[0022]

The present invention will be described in more detail with reference to the following Examples and Experimental Examples.

Example 1 (Preparation of Pouch) First, ultrafine titanium dioxide was applied to a polyethylene terephthalate film (PET film) having a thickness of 12 μm in a dry state at about 0.8 g / m ² in a dry state. The printing was applied by a printing machine. Then, a stretched nylon film having a thickness of 25 μm was adhered to the printing surface of the printed film by dry lamination to prepare a laminated film having a titanium dioxide layer between the PET film and the nylon film. Next, on this laminated film, a 15 μm
Thick polyethylene vinyl alcohol film (EV
OH film) by dry lamination. Next, a 130 μm-thick linear low-density polyethylene film having a high environmental stress resistance to fats and oils and a very low drop impact resistance at low temperatures is used as a film for the sealing surface of the pouch on the laminated film. (LL polyethylene film) was similarly laminated by a dry lamination method.

Next, a three-sided structure consisting of front and back surfaces (both sides) and a bottom (bottom) was opened at the top by a self-standing bag making machine which is usually performed using the laminated film thus obtained. A self-standing bag (standing pouch) with a capacity of about 600 ml was created (effective dimensions are vertical 200 mm,
Horizontal 130mm and bottom width 35mm. The effective surface area is 550 cm ² ). Next, the upper corner of this bag is cut diagonally, and a spout with a screw-in cap having a tamper-proof function (inner diameter about 9 mm, outer diameter about 1
A spout and an inner polyethylene layer were melt-bonded by applying a pressure of about 1 kg / cm ² from the outer surface for about 1 ^second using a hot plate at about 240 ° C.

The standing pouch having the resealing function cap in the upper corner cutout thus produced can be distributed in this state with the top part unfused.

There is no particular difficulty in filling the contents into such a standing pouch. For example,
Using a partially modified normal bag-type filling and packaging machine,
Open the unfused part of the top of the pouch, fill it with oil such as salad oil from here, and hold both sides of the pouch on top of the oil surface with a deaeration bar, for example, so that the head space is appropriate. By a hot plate.

Experimental Example 1 (Light Storage Test) As storage containers, the following three types of containers were used. That is, (1) the standing pouch (white pouch) of the present invention prepared in Example 1 and (2) the standing pouch ((pouch) prepared in the same manner as in Example 1 except that no titanium dioxide layer was provided). (Transparent pouch) and (3) a plastic bottle for filling 1500 g conventionally used as an excellent packaging material in the applicant company (the material is PE
(Polyethylene) / EVOH / PE “Lamicon bottle” (manufactured by Toyo Seikan Co., Ltd.).

As the filling oil, 5: 5 of rapeseed oil and soybean oil was used.
(W / w) Mixed oil was used. In the case of a white pouch and a transparent pouch, this mixed oil was filled by the method described at the end of Example 1 above. In the case of white and transparent standing pouches, assuming that the head space at the time of filling with oil is unlikely to be constant, the filling air amount (volume of head space) at the time of filling is (a) 0 ml, (b) 10 ml. And (c) adjusted to three stages of 30 ml, and a storage test was performed for each. In the case of a Lamicon bottle, the filling amount, and hence the head space, can be adjusted very easily, so that the head space (20 ml) as in the past was used. That is, in this experimental example, the preservation test was performed on a total of seven samples of three types of packaging materials.

The condition of the storage test is as follows:
It was kept at 24 ° C. under 00 lux for 2 weeks.

Two weeks later, each oil was subjected to a sensory evaluation of light odor and flavor. In detail, the evaluation of the light odor is
The intensity of the light odor was evaluated by three skilled panels based on the five grades shown in Table 1 below. In addition, the evaluation of the flavor was carried out by using four skilled panels by the five-point method according to the evaluation criteria shown in Table 1 below and taking the average score.

[0031]

[Table 1]

After 2 weeks, the color and the peroxide value of each oil were measured. More specifically, the color was measured by the method of ROBIBOND. Also,
The peroxide value was analyzed by a standard fat analysis method.

The results are shown in Table 2 below.

[0034]

[Table 2]

From the above results, the white pouch is better in preservability than the other two in terms of flavor as compared with the current Lamicon bottle (standard). It was also found that the same results were obtained for the light odor. Regarding the color, there was no significant difference between the standing pouches compared to the current packaging materials. The peroxide value (POV) tends to depend on the dead space, but under the storage conditions in this test example, no large difference was observed between the two types of pouches. Did not give.

In general, the storage stability of both white and transparent pouches is superior to, but not inferior to, current Lamicon bottles.

Experimental Example 2 (Inspection of Ultraviolet Transmittance) With respect to the same three kinds of packaging materials as in the preceding Experimental Example 1, the light transmittance of the container wall was inspected. The results for the white pouch, transparent pouch and ramicon bottle are shown in FIG. 2A, respectively.
To C.

From these figures, it can be seen that the ultraviolet (400 nm)
White pouches have a transmittance of 20% or less, preferably 10% or less, like the Lamicon bottles, while transparent pouches have a transmittance of 50% or more. Inferior to white pouch due to odor.

EXPERIMENTAL EXAMPLE 3 (Inspection of Oxygen Permeability) The oxygen permeability was inspected using the same white pouch and ramicon bottle as in Experimental Example 1. That is, the standing pouch prepared in exactly the same manner as in Example 1 was obtained by fusing the top portion of a fusing portion and a ramicon bottle, each of which was taken at five points. After storing for 1 week in an environmental test room at a humidity of 65%, the oxygen in the container was measured with a zirconia oxygen analyzer manufactured by Toray Industries, Inc.

As a result, the amount of oxygen in the white pouch was 0.5 ml for 7 days. On the other hand, another experiment has confirmed that the oxygen permeation under a 100% oxygen atmosphere is equivalent to 5 times, so this value corresponds to 2.5 ml / day · atm. Therefore, 500 g of oil (about 50
0 ml), 0.001 g of oil filled
It corresponds to 071 ml / day · atm. On the other hand, the oxygen content in the ramicon bottle was 0.98 ml in 7 days.
This is equivalent to 0.0014 ml / day · atm per g of filled oil when the oil is filled under the same assumption.

As a result, the white pouch completely satisfies the requirement of oxygen permeability of 0.001 ml / day · atm or less per g of oil that can be filled in the pouch,
Lamicon bottles are only very satisfying.

[0042]

According to the present invention, a three-sided self-standing soft wrapping bag (standing pouch) for oil, which is excellent in preventing quality deterioration due to oxygen or light, has good quality retention, and has excellent disposal properties. Is easily provided. The standing pouch of the present invention is also excellent in self-sustaining stability and convenience in use.

[Brief description of the drawings]

FIG. 1 shows a conceptual diagram of a standing pouch having a resealable spout in an upper corner cutout of the present invention.

FIG. 2A is a graph showing the translucency of the white pouch of the present invention (Experimental Example 2).

FIG. 2B is a graph showing the translucency of the transparent pouch (same as above).

FIG. 2C is a graph showing the translucency of a ramicon bottle (same as above).

Continued on the front page (72) Inventor Hideaki Abe 7-41, Oguro-cho, Tsurumi-ku, Yokohama-shi, Kanagawa Prefecture Ajinomoto Co., Inc. Yokohama Plant (72) Inventor Osamu Mori 1-1, Suzukicho, Kawasaki-ku, Kawasaki-shi, Kanagawa Ajinomoto Food Research Institute, Inc.

Claims (6)

[Claims] 1. A standing pouch for oil with a spout, comprising a resealable spout at an upper corner cutout. 2. The standing pouch for oil with a spout according to claim 1, wherein the film material on the side and bottom surfaces of the standing pouch is a laminated film having an oxygen barrier film in an intermediate layer. 3. The film material on the side and bottom surfaces of the standing pouch has an oxygen barrier film in the intermediate layer,
The standing pouch for oil with a spout according to claim 1 or 2, wherein the inside is a laminated film composed of a polyethylene film and the outside is composed of a polyethylene terephthalate film and / or a nylon film. 4. The standing pouch for oil with a spout according to claim 3, further comprising a titanium dioxide layer between the polyethylene terephthalate film and the nylon film. 5. The oxygen permeability of the whole pouch is not more than 0.001 ml / day · atm, preferably not more than 0.0005 ml / day · atm per g of oil that can be filled in the pouch, and ultraviolet light from each side of the bag. The standing pouch for oil with a spout according to any one of claims 1 to 4, wherein the transmittance at a wavelength of 400 mm is 20% or less, preferably 10% or less. 6. The amount of oxygen contained in the air in the headspace is 0.02 ml or less, preferably 0.1 g / g of the filled oil.
The standing pouch for oil with a spout according to any one of claims 1 to 5, wherein the oil is filled so as to be 001 ml or less.