JP3154951U - Leafy vegetables packaging bag - Google Patents

Abstract

The present invention provides a packaging bag in which the air permeability can be changed according to the type of leaf vegetable by slitting the leaf vegetable packaging bag using a slitter. In a synthetic resin film bag for packaging leafy vegetables, the front side synthetic resin film 1 constituting the front side of the bag or the back side synthetic resin film constituting the back side of the bag is arranged in front of the bag or A row of ventilation cuts 9 is provided along one direction that crosses the back surface or the longitudinal direction. The ventilation cuts 9 are along a direction perpendicular to the row of ventilation cuts 9. [Selection] Figure 1

Description

  The present invention relates to a bag made of a synthetic resin film for packaging leafy vegetables.

  Leaf vegetables such as spinach, komatsuna and trefoil continue to work after being harvested and packaged in bags. Absorbs oxygen and discharges carbon dioxide. Dissipates water vapor and heat.

  The bag for packaging leafy vegetables is made of a synthetic resin film, and the synthetic resin film has a vent hole. Breathability is given. Even if the leaf vegetable packaging bag is low or high in air permeability, the leaf vegetable deteriorates quickly. When the air permeability is optimal, the freshness of the leaf vegetables is maintained for a long time. The optimum air permeability varies depending on the type and amount of leaf vegetables to be packaged. The air permeability of the packaging bag is adjusted by increasing or decreasing the size and number of the air holes.

  When manufacturing leaf vegetable packaging bags, the synthetic resin film is passed through a punch with a hot needle and penetrates countlessly through a small vent with a hot needle roll. Make it porous. The ventilation holes are arranged at equal intervals in the front, rear, left and right directions on the entire surface of the synthetic resin film. The wide porous synthetic resin film is passed through a slitter and cut into a plurality of strips with a blade to form a strip with a desired width. A band-shaped porous synthetic resin film having a desired width is loaded into a packaging machine, welded and cut, and packaged with leafy vegetables.

JP-A-6-125697

[Task]
In order to obtain the optimum air permeability for the leaf vegetables of the contents, the size and number of vent holes opened in the synthetic resin film are changed according to the type and amount of the leaf vegetables of the contents.

  However, in order to change the size, number and arrangement interval of the vent holes in the synthetic resin film, the needle roll of the punching machine with a hot needle is replaced with a roll with a needle having a different needle thickness, number and arrangement interval. There is a need. It takes time to purchase and replace rolls with different needles. It is not easy to change the size and number of ventilation holes that are opened in the synthetic resin film.

Moreover, in order to provide a vent hole on the entire surface in the front, rear, left and right directions in the synthetic resin film, a punching machine provided with a roll with a needle for heating to a high temperature state is required. A process with a large punch is essential. Synthetic resin films used for leaf vegetables packaging bags are difficult to manufacture. It becomes expensive.
It is not easy to change the breathability of leaf vegetable packaging bags. Obtaining optimal breathability is not easy.

[Idea]
The synthetic resin film used for the leafy vegetables packaging bag is not provided with ventilation holes on the front, rear, left and right, but with a row of ventilation cuts in one direction. In order to provide a row of cuts in one direction, a slitter provided with a cutter wheel mechanism for forming cuts was used.

  When a wide synthetic resin film is passed through a slitter equipped with a cutlery mechanism for forming a cut, it is cut into a strip having a desired width, and a row of cuts is formed in the strip running direction in the desired width. Is done. A belt-like breathable synthetic resin film having a desired width can be easily obtained. This synthetic resin film is welded and cut in the same manner as in the prior art, and the leaf vegetables are packaged.

  When the air permeability of the synthetic resin film is lowered or increased, the number of blades attached to the slitter is changed by increasing or decreasing the number of bladed wheels attached to the slitter. Alternatively, the cutter wheel is replaced with one having a different blade length, number or arrangement interval, and the cut length, number or arrangement interval is changed.

1) In a synthetic resin film bag for packaging leafy vegetables,
The synthetic resin film on the front side that constitutes the front of the bag or the synthetic resin film on the back side that constitutes the back of the bag is ventilated along one direction that crosses the front or back of the bag or in the longitudinal direction. A package bag of leafy vegetables characterized by having a row of cuts for use.
2) In the leaf vegetable packaging bag,
The cuts for ventilation are characterized by being along a direction perpendicular to the row of cuts for ventilation.
3) In the leaf vegetable packaging bag,
Leafy vegetables are characterized by spinach, komatsuna or trefoil.

  Easy to change ventilation. Optimal breathability is easily obtained.

The front view of the packaging bag of leaf vegetables in the 1st example of the embodiment of the present invention. FIG. 2 is an end view taken along line AA in FIG. 1. The top view of the strip | belt-shaped breathable synthetic resin film which manufactures the packaging bag. The schematic side view of the slitter with a knives wheel mechanism which manufactures the same strip | belt-shaped breathable synthetic resin film. The schematic plan view of the slitter with the cutter tool mechanism. The rear view of the packaging bag of leaf vegetables in the 2nd example of an embodiment. FIG. 7 is an end view taken along line BB in FIG. 6. The top view of the strip | belt-shaped breathable synthetic resin film which manufactures the packaging bag.

[First example (see FIGS. 1 to 5)]
As shown in FIGS. 1 and 2, the leaf vegetable packaging bag of this example is formed by stacking the synthetic resin film 1 on the front side and the synthetic resin film 2 on the back side and welding the periphery thereof to form a vertically elongated bag. ing. Package spinach H.

  This packaging bag has an isosceles trapezoidal shape, the equal length left side 3 and right side 4 are non-parallel, the upper side 5 and the lower side 6 are parallel, and the upper side 5 is longer than the lower side 6. The synthetic resin films 1 and 2 on the front side and the back side weld the left side 3 and the right side 4, respectively, and weld the central part of the lower side 6. A drain hole 7 is provided between the welding left side 3 and the welding lower side 6 and between the welding right side 4 and the welding lower side 6, respectively. Both synthetic resin films 1 and 2 have the upper side 5 taken in and out, and are closed during packaging.

  The synthetic resin films 1 and 2 on the front side and the back side are each provided with a row of cut lines 9 for ventilation along the direction transverse to the left and right. There are three rows of ventilation cuts 9, which are arranged at the vertical center position, the middle position between the middle position and the upper side 5, and the middle position between the vertical center position and the lower side 6. Each cut 9 is along a direction orthogonal to the row of cuts 9. The synthetic resin films 1 and 2 are less likely to be torn at the position of the row 9 of cuts than when each cut 9 is along a direction parallel to the row of cuts 9.

  The synthetic resin films 1 and 2 are made of polypropylene, polyethylene, polyamide, polyethylene terephthalate, or the like. It is a composite or single layer synthetic resin film.

  When manufacturing a packaging bag, the wide synthetic resin film as a raw material is passed through a slitter and cut into a plurality of strips having a desired width, and a row of cuts 9 for ventilation is formed. A belt-like breathable synthetic resin film f having a desired width is obtained. As shown in FIG. 3, the band-shaped synthetic resin film f has a width equal to the vertical length of the synthetic resin films 1 and 2 on the front side and the back side of the packaging bag, and has a cut 9 for ventilation along the longitudinal direction. Form a column. There are three rows of ventilation cuts 9, which are arranged at the center position in the width direction, the middle position between the center position and one end, and the middle position between the center position in the width direction and the other end. Each cut 9 is along a direction orthogonal to the row of cuts 9.

  The slitter has the upper roller 11 and the front roller 12 arranged in parallel as shown in FIGS. The wide synthetic resin film F as a raw material sequentially passes through the upper roller 11 and the front roller 12. A blade 13 for cutting the wide synthetic resin film F into a plurality of narrow synthetic resin films f is provided at an intermediate position between the rollers 11 and 12. The blade 13 is disposed above the cutting position of the wide synthetic resin film F. At the upper position of the upper roller 11, a cutter wheel 14 having a shape in which each tooth of a spur gear is a blade is provided as a cutting tool for forming a cut. The cutter wheel 14 has its axis parallel to the axes of the rollers 11 and 12 and each blade parallel to the axis of the cutter wheel 14. The cutter wheel 14 is disposed above the position where the narrow synthetic resin film f is to be formed as nine rows of cut lines.

  The wide synthetic resin film F passes between the upper roller 11 and the cutter wheel 14, and the rotating cutter wheel 14 is pressed during the passage, so that the cuts 9 are cut at a constant interval. A row of cut lines 9 is formed along the traveling direction of the synthetic resin film F and the longitudinal direction of the strip-shaped synthetic resin film f having a desired width. Thereafter, the wide synthetic resin film F passes through the lower side of the blade 13 and the front side of the front roller 12, the blade 13 is pressed when passing the blade position, and is cut into a plurality of strip-shaped synthetic resin films f having a desired width. . Each strip-shaped synthetic resin film f has a row of cut lines 9 formed along the longitudinal direction. There are three rows of breaks 9.

  The belt-shaped breathable synthetic resin film f having a desired width is formed by aligning one sheet for cutting out the synthetic resin film 1 on the front side of the packaging bag and one sheet for cutting out the synthetic resin film 2 on the back side. As shown by a chain line in FIG. 3, the two synthetic resin films f are welded at positions where the packaging bag has the welding left side 3, the welding right side 4 and the welding bottom side 6, and at positions outside the welding left side 3 or the welding right side 4. Disconnect. Get a packaging bag.

[Second Example (see FIGS. 6 to 8)]
As shown in FIGS. 6 and 7, the leaf vegetable packaging bag of this example is formed by bending the left and right sides of one synthetic resin film to the same side and welding the left and right sides of the synthetic resin film together. The synthetic resin film has a flat cylindrical shape. The cylindrical synthetic resin film welds the upper side and the lower side to close the upper end opening and the lower end opening. It is a vertically long rectangular bag. Package spinach H.

  This packaging bag has a bent left side and a bent right side, a welding upper side and a welding lower side. On the back surface, a connecting portion 21 of the synthetic resin film is arranged along the vertical direction at the center position in the horizontal direction. The synthetic resin film 22 on the back side is provided with a row of cuts 9 for ventilation along the left and right sides of the connecting portion 21 along the vertical direction. There are two rows of cut lines 9 for ventilation. Each cut 9 is along a direction orthogonal to the row of cuts 9. Similarly, the synthetic resin film 23 on the front side is also provided with two rows of cuts 9 along the vertical direction.

  When manufacturing a packaging bag, the wide synthetic resin film as a raw material is passed through a slitter and cut into a plurality of strips having a desired width, and forms a row of cuts 9 for ventilation. A belt-like breathable synthetic resin film f having a desired width is obtained. As shown in FIG. 8, the strip-shaped synthetic resin film f has a width that is twice the sum of the width of the packaging bag and the width of the connecting portion 21, and has four cut lines 9 along the longitudinal direction. Form a column. In the row of cut lines 9 for ventilation, two lines are arranged in the portion that becomes the front surface of the packaging bag and two lines are arranged in the portion that becomes the back surface of the packaging bag. Each cut 9 is along a direction orthogonal to the row of cuts 9.

  The slitter is the same as in the first example. However, the cut width of the strip-shaped breathable synthetic resin film f and the number of lines of the cut lines 9 are different.

A belt-like breathable synthetic resin film f having a desired width is loaded into a packaging machine, and the tip portion is disposed horizontally. At the tip of the synthetic resin film f, put a piece of spinach H on the center in the width direction and the front of the packaging bag, fold the left and right sides in the width direction upward, and weld the left and right sides Connect to a flat cylinder with a single spinach H. The cylindrical synthetic resin film f is welded at a position that becomes the upper side and a lower side of the packaging bag, and is cut at a position outside the upper side of the welding or the lower side of the welding. Obtain a packaging bag containing spinach H.
Other points are the same as in the first example.

[Modification]
1) In the above-described embodiment, the ventilation cut 9 is a straight line, but it is a broken line or a curved line.
2) In the above-described embodiment, the cuts 9 for ventilation are provided on both sides of the synthetic resin film on the front side and the synthetic resin film on the back side of the packaging bag, but are provided only on the synthetic resin film on one side.
3) In the first example of the above embodiment, the packaging bag is trapezoidal but is rectangular.

H Spinach F Raw material wide synthetic resin film f Desired belt-shaped breathable synthetic resin film 1 Front side synthetic resin film 2 Back side synthetic resin film 3 Left side, welding left side 4 Right side, welding right side 5 Upper side, taking in and out Mouth, upper welded edge 6 lower edge, welded lower edge 7 drainage hole 9 cut 21 for ventilation 21 synthetic resin film connecting part 22 synthetic resin film 23 on the back side synthetic resin film on the front side

Claims (3)

In a bag made of synthetic resin film that wraps leaf vegetables,
The synthetic resin film on the front side that constitutes the front of the bag or the synthetic resin film on the back side that constitutes the back of the bag is ventilated along one direction that crosses the front or back of the bag or in the longitudinal direction. A package bag of leafy vegetables characterized by having a row of cuts for use.   The leaf vegetable packaging bag according to claim 1, wherein the cuts for ventilation are along a direction perpendicular to the row of cuts for ventilation.   The leafy vegetables packaging bag according to claim 1 or 2, wherein the leafy vegetables are spinach, komatsuna or trefoil.

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