JP2008062946A - Packaging bag for powdery food - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a packaging bag for powdery food, the packaging bag being capable of preventing a degradation in the quality of powdery food, caused by moisture entering a head space via a deaeration hole. <P>SOLUTION: The packaging bag includes a packaging bag body 2 formed from a laminated film packaging material and openable at one end. The packaging bag also includes a fastener device 3 formed from a male fastener piece 9 and a female fastener piece 10, disposed on the corresponding internal faces of the packaging bag body 2 near the open end 2a so as to open or close the opening. The packaging bag further includes a narrow-width rough faces 4 disposed between the open end 2a and the fastener device 3 of the packaging bag body 2 and having through-holes made in the faces 4. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a packaging bag for powdered food used for filling and packaging powdered food such as wheat flour and buckwheat flour.

  In general, a packaging bag for filling and packaging powdery food is a gusseted packaging bag having an upper end opening formed by a packaging material in which a paper material and a seal film are joined. The packaging bag is a powdered food package that is used for storage and transportation of powdered food by filling the powdered food from the opening end and then closing the opening end by heat sealing means. is there.

  The above-mentioned powdered food packaging body has a gusset-shaped packaging bag filled with powdered food using a filling device, and the opening end of the gusset-shaped packaging bag is closed by heat sealing means. A head space is formed between the upper end opening and the filled powdery food, and air remains in the head space.

  The above-mentioned powdery food package is gusseted by degassing the air remaining in the head space of the gusset-type packaging bag by mechanical deaeration means, and then closing the upper end opening of the gusset-type packaging bag by heat sealing means. Air is not left in the head space between the upper end heat seal part of the shaped packaging bag and the filled powdery food.

  However, when the powdered food packaging body deaerates the air remaining in the head space of the gusset type packaging bag from the opening end of the gusset type packaging bag by mechanical deaeration means, and the opening end is closed by the heat seal means, It is difficult to completely remove the air remaining in the head space of the gusset-type packaging bag. Therefore, when powdered food packages filled with powdered food are stacked and stored in a gusset-shaped packaging bag, a large load is applied to the powdered food package located on the lower side. The pressure of the air remaining in the head space of the package increases, and this may damage the gusseted packaging bag.

  A packaging bag for rice cereals in which a deaeration hole is provided in a portion corresponding to the head space of the packaging bag to completely remove the air remaining in the head space of the packaging bag in order to prevent bag breakage during storage of the package. Is described, for example, in JP-A-11-79200.

The above-mentioned packaging bag for rice cereals is made by stacking and stacking a plastic film packaging material with a plastic film provided with a deaeration hole on one end of a normal plastic film so that the plastic film provided with a deaeration hole is located on the upper end side. The side end and the lower end excluding the upper end of the combined plastic film packaging material are bonded to each other by heat sealing means.
JP 11-79200 A

  The above-mentioned type of packaging bag can prevent bag breakage due to pressure rise of air remaining in the head space by deaeration of air remaining in the head space through the deaeration holes, but it can be stored during storage. Because the moisture that enters the head space through the deaeration hole of the packaging bag is in direct contact with the contents filled with moisture, the problem is that the filled contents are affected by moisture and the quality of the contents is deteriorated. is there.

  An object of the present invention is to provide a packaging bag for powdered foods that solves the problems of the prior art and prevents deterioration of the quality of the powdered foods due to moisture entering the headspace through the deaeration holes. .

  The packaging bag for powdery food according to the present invention includes a packaging bag body having one end opening formed of a laminate film packaging material, and a male fastener arranged to open and close the opening on the inner surface near the opening end of the packaging bag body. It is comprised from the fastener apparatus which consists of a piece and a female fastener piece, and the narrow-width rough surface part which has a penetration scar arrange | positioned between the opening end of a packaging bag main body, and a fastener apparatus.

  According to the present invention, most of the moisture that enters the head space of the packaging bag through the through-scratches on the narrow rough surface provided in the packaging bag is prevented by the fastener device composed of the male fastener piece and the female fastener piece. Therefore, it is possible to prevent quality deterioration due to moisture of the filled powdery food.

Hereinafter, an embodiment of a powdered food packaging bag according to the present invention will be described with reference to the accompanying drawings.
As shown in FIGS. 1 and 2, the packaging bag 1 for powdered food according to the present invention has a packaging bag body 2 having an upper opening and an inner surface near the opening end 2 a of the packaging bag body 2 in parallel with the opening end 2 a. The fastener device 3 is disposed, and the narrow rough surface portion 4 is disposed so as to correspond to the head space formed between the opening end 2 a of the packaging bag body 2 and the fastener device 3.

  As shown in FIGS. 1 and 2, the packaging bag body 2 is composed of three pieces, that is, face portions 5, 5 and a bottom portion 6 that are arranged to face each other. The packaging bag body 2 is inserted in such a manner that the bottom portion 6 is folded between the lower ends of the overlapped surface portions 5 and 5 so that the folded end 6a is positioned upward, and both side ends of the surface portions 5 and 5 are heat sealed. The end portions of the surface portions 5 and 5 are joined to each other by the lower end heat seal portion 8 formed by the heat sealing means. It is a self-supporting packaging bag configured.

  In the packaging bag body 2, the surface portions 5, 5 and the bottom portion 6 are formed of a laminated film packaging material of the same biaxially stretched polyester film and linear low density polyethylene film. The surface portions 5 and 5 and the bottom portion 6 may be a laminate film packaging material of biaxially stretched nylon film / aluminum-deposited polyethylene terephthalate film / linear low density polyethylene layer.

  The packaging bag body 2 is preferably a self-supporting packaging bag for filling powdered food such as wheat flour, for example, but the four parts of the gusset portion located on both sides of the double-sided portion and the double-sided portion. It may be a gusseted packaging bag composed of pieces.

  As shown in FIG. 2, the fastener device 3 is formed of a male fastener piece 9 and a female fastener piece 10 formed of a plastic material. The male fastener piece 9 and the female fastener piece 10 of the fastener device 3 are arranged so as to extend in series from one end to the other end of the surface portion 5 of the packaging bag body 2. The male fastener piece 9 and the female fastener piece 10 are joined to the surface portion 5 at both end portions by the side end heat seal portions 7, 7, and the remaining portions located between the side end heat seal portions 7, 7 are attached to each surface. The portion 5 is thermally bonded. Therefore, the fastener device 3 can completely close the opening of the packaging bag body 2 by fitting the male fastener piece 9 and the female fastener piece 10 together.

  The narrow rough surface portion 4 is formed by press-contacting a 7 mm wide grindstone disc to the biaxially stretched polyester film side surface of the laminate film packaging material. The narrow rough surface portion 4 has a scratch located only on the biaxially stretched polyester film and a penetrating scar that penetrates the biaxially stretched polyester film and the linear low-density polyethylene film. The penetration scar formed on the narrow rough surface portion 4 acts as a deaeration hole of the packaging bag. The width of the narrow rough surface portion 4 formed on the packaging bag body 2 is preferably about 7 mm, but is not limited to this width.

  When the narrow rough surface portion 4 is formed by pressing a grindstone disc of a specific product number against the laminate film packaging material, it is desirable that the hole diameter of the penetrating scar is 50 to 100 μm. The narrow rough surface portion 4 can be formed by changing the grindstone disk to a roll wound with sandpaper.

  When the narrow rough surface portion 4 is formed by press-contacting a roll wound with No. 150 sandpaper, the hole diameter of the penetrating scar is 25 to 100 μm and the average hole diameter is 50 μm. When the narrow rough surface portion 4 is formed by press-contacting a roll wound with No. 100 sandpaper, the hole diameter of the penetrating scar is 50 to 150 μm, and the average hole diameter is 100 μm. When the above-mentioned narrow rough surface portion 4 is formed by press-contacting a roll wound with No. 80 sandpaper, the hole diameter of the penetrating scar is 100 to 300 μm and the average hole diameter is 200 μm.

  The packaging bag body 2 forms a package by filling powdered food and closing the open end. When the powdered food filled in the packaging bag body 2 is flour, it is formed in the package. In order to effectively degas the air in the head space and to suppress moisture entering the head space through the through scar provided on the narrow rough surface portion 4 of the packaging bag body 2, the average pore diameter of the through scar is 50 to 50. Experiments have shown that 100 μm is preferable.

  In FIG. 3, reference numeral 11 denotes an upper end heat seal portion for sealing the opening end of the packaging bag 1.

  Thus, the packaging bag 1 according to the present invention, when filling flour with a filling device, fills the internal space with a predetermined amount of flour and is provided with the male fastener piece 9 of the fastener device 3 provided at a portion close to the opening end. The meshing portion of the female fastener piece 10 is closed, air remaining in the head space formed between the upper end opening and the flour is deaerated by mechanical deaeration means, and then the upper end opening is formed by heat sealing means. The flour package is configured by being closed by the upper end heat seal portion 11.

  The packaging bag 1 according to the present invention communicates the penetrating scar of the narrow rough surface portion 4 formed between the opening end 2a and the fastener device 3 with the head space formed near the opening end 2a. The air remaining in the space can be completely deaerated through the through scars on the narrow rough surface portion 4.

  Further, the packaging bag 1 according to the present invention has a headspace through a through scar of the narrow rough surface portion 4 by a fastener device comprising a male fastener piece 9 and a female fastener piece 10 arranged at a position close to the opening end 2a on the inner surface. Since most of the moisture that enters is prevented, the quality of the filled flour due to moisture can be prevented from being deteriorated.

  In the above embodiment, the powdered food to be filled has been described by taking wheat flour as an example, but the powdered food may of course be buckwheat flour or rice flour.

It is a top view of the packaging bag for powdery food by this invention. It is sectional drawing along the II-II line of FIG. It is a perspective view which shows the use condition of the packaging bag for powdery foods by this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Packaging bag for powdery food 2 Packaging bag main body 3 Fastening device 4 Narrow width rough surface part 9 Male fastener piece 10 Female fastener piece

Claims (4)

  A packaging bag body having one end opening formed of a laminate film packaging material, and a fastener device comprising a male fastener piece and a female fastener piece arranged to open and close the opening on the inner surface near the opening end of the packaging bag body; A powdery food packaging bag comprising: a narrow rough surface portion having a penetrating scar disposed between an opening end of the packaging bag main body and the fastener device.   2. The packaging bag for powdered food according to claim 1, wherein the packaging bag body is a self-supporting packaging bag comprising a double-sided portion and a bottom portion.   The packaging bag for powdery food according to claim 1, wherein the laminate film packaging material is a laminate film of a biaxially stretched polyester film and a linear low density polyethylene film.   The powdered food packaging bag according to claim 1, wherein the through-hole scars in the narrow rough surface portion have an average pore diameter of 50 to 100 μm.

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