JPH11171201A - Net bag with handle for packaging article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a durable net bag with handles for packaging an article. SOLUTION: The net bag comprises a bag body made of a grid net film sheet 3 which is woven with split yarns made of thermoplastic resin as wide as 0.5 to 5 mm placed longitudinally and laterally at distances of a width of the split yarn or wider. At least three peripheral rims of a tip of a handle tape made of a thermoplastic resin film similar to the split yarn is heat-fused to an opening rim at both ends of the opening of the above mentioned bag body.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a net bag with a handbag for packing goods made of a net film sheet having good air permeability.

[0002]

2. Description of the Related Art A net film sheet woven in a lattice pattern using split yarns obtained by shredding a synthetic resin film in a vertical and horizontal direction is used for various purposes. When a bag is manufactured using a film instead of a film, there is a gap in the net film sheet, so that the welding area of the welded portion on the side edge of the bag is small,
Since the lattice shape of the net film is unstable and easily collapsed, there is a disadvantage that the welded portion is easily broken. Also, it is difficult to provide a strong hand-held portion on the opening edge of the bag body for the same reason.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to provide a durable net bag with a handle for packaging a product under such circumstances.

[0004]

SUMMARY OF THE INVENTION The inventor of the present invention has proposed a method of manufacturing a product packaging bag with a handbag by using a net film sheet in a normal bag-making process. Is very susceptible to breakage during use. As a result of observing the reason, it has been found that the stability of the shape of the grid-like net film is poor, and the strength of the welded portion is liable to decrease because the grid-like split yarn moves near the welded portion. In such a lattice net film bag, first, it is necessary to improve the welding strength between the leading end film of the tape and the lattice net film at the opening edge when providing the support portion. The present inventor believes that the stability of the shape of the net film sheet at the welded portion is important in improving the strength of welding between the hand-held film and the net film sheet, and the shape of the film tape and the net film sheet that are polymerized at the time of welding. In order to stabilize the film, instead of providing a linear welded portion by heat sealing which is usually performed simply by bag making, if at least three peripheral edges of the welded film (the leading end of the handheld film tape) are welded, the three-dimensional peripheral edge is welded. It was found that the shape of the net film sheet surrounded by was stable and the strength was dramatically increased, so that it could be used. Also,
The inventor of the present invention has also found that when welding the side edges of two net films, the width of the weld is two or more, preferably three or more, counted from the side edge. It has been found that when the width includes the split yarn parallel to the above, the welding strength is several times as large as that of the heat seal having the width including one. The present invention has been completed based on this finding. That is, the present invention is an invention comprising the following items. (1) Opening edges on both sides of the opening of a lattice-shaped net film sheet bag formed by arranging split yarns of thermoplastic resin having a width of 0.5 to 5 mm vertically and horizontally with a gap not less than the width of the split yarns. A thermoplastic resin film-like handbag tape of the same quality as the split yarn, wherein at least three peripheral edges of the tip are thermally welded. (2) The net bag with a handbag for product packaging according to item 1, wherein the bag body portion has a square bottom shape by a gusset folding structure provided at a bottom portion. (3) The net bag with a handbag for product packaging according to item 1, wherein the bag body has a square bottom structure by a gusset folding structure provided on a side edge. (4) The net bag with a handbag for product packaging according to item 1, item 2 or item 3, wherein the grid-like net film sheet is welded at the intersection of the vertical and horizontal split yarns. (5) The bag body is formed by half-folding the lattice-like net film sheet, and heat-sealing the bag body with a width including two or more split yarns along the side edge and parallel to the bag body side edge. Item 1, Item 2 or Item 4 which is a bag body portion having both side edges fixed.
Net bag with a handbag for product packaging as described. (6) Opening edges on both sides of an opening of a lattice-shaped net film sheet bag body in which split yarns of thermoplastic resin having a width of 0.5 to 5 mm are laid out vertically and horizontally with a gap larger than the width of the split yarns. A net with a handbag for product packaging, in which the tip of a handbag tape is adhered with an adhesive to a handbag mounting base portion formed by heat welding at least three peripheral edges of a thermoplastic resin base film piece of the same type as the split yarn. bag. (7) The net bag with a handbag for product packaging according to item 6, wherein the bag body has a square bottom shape by a gusset folding structure provided at the bottom. (8) The net bag with a handbag for product packaging according to item 6, wherein the bag body has a square bottom structure by a gusset folding structure provided on a side edge. (9) The net bag with a handbag for product packaging according to item 6, 7 or 8, wherein the grid-like net film sheet is welded at the intersection of the vertical and horizontal split yarns. (10) The bag body is formed by half-folding the lattice-like net film sheet, and heat-sealing the bag body with a width including two or more split yarns along the side edge and parallel to the side edge of the bag body. Item 6, Item 7, or Item 9, which is a bag body portion having both side edges fixed.
Net bag with a handbag for product packaging as described.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A grid-like net film sheet 3 made of a material for a net bag with a handle according to the present invention is formed by splitting a split yarn of thermoplastic resin having a width of 0.5 to 5 mm with a gap not less than the width of the split yarn. As shown in the plan view of FIG. 1, a double lattice surface a in which two lattice-like split yarns are overlapped and a single lattice surface b in which the split yarns are single-layered. Is a sheet in which a rectangular void surface c surrounded by a single lattice plane b is regularly empty. The interval between the split yarns of the net film sheet is required to be at least larger than the width of the split yarn in order for the gap surface c to exist. For example, in the case of a double interval, the double lattice surface a,
The dimensions of the single lattice plane b and the gap plane c are the same. The interval between such split yarns is preferably 1 to 2.5 times, and if it exceeds 2.5 times, the grid net sheet becomes too flexible and the shape of the bag body is not stable. In addition, the welding strength of the upper, side edges and the support portion is also reduced. It is desirable that the net film sheet used in the present invention be subjected to a thermocompression treatment and welded with a double split yarn on the double lattice plane a because the shape of the net film sheet is dramatically stabilized. In this heat treatment, the split yarn grid is fixed by welding or semi-welding, for example, by thermocompression bonding a split yarn grid. In the welding of the present invention, semi-welding is preferable from the viewpoint of the thermocompression bonding operation. The split yarn of the net film sheet used in the present invention is obtained by cutting a resin film into an elongated shape with a width of 0.5 to 5 mm, and the material of the resin film is not particularly limited as long as it is a thermoplastic resin. Particularly, polyolefins such as polyethylene and polypropylene, which are stretched in the longitudinal direction, are preferable in view of the strength of the split yarn.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A net bag with a carrier according to the present invention will be described in detail with reference to the accompanying drawings. FIG. 2 shows a basic mode of a net bag with a handbag according to the present invention, which comprises a bag body portion A and a handbag portion B. In this figure, the lattice shape of the net film sheet of the material of the bag portion of the net bag with a handbag is omitted, but the net film sheet of FIG. 1 is used here. This net bag with a handle is obtained by half-folding one lattice-like net film sheet 3 at the bottom, as shown in FIG.
Is formed by welding the side edges 1 of the polymerized net film. In the present invention, the width of the welded portion on the side edge of the bag body is determined depending on the width of the split yarn, and it is necessary that the width includes at least two or more, particularly preferably 3 to 5 split yarns. When the width is one or less, the strength of side edge welding is extremely reduced. Further, if the width of the welded portion is too large, the internal volume of the bag body decreases, which is not desirable. Although the split yarns included in the welded portion are not shown, the side edge welded portion 1 in this figure includes three split yarns arranged along the side edge counted from the side edge. Further, the side edges of the welded portion can be formed by mechanical cutting or fusing. Cutting by fusing is preferable because the split yarn is fixed. The handbag shown in FIG. 2 has a structure in which both ends of a single handbag tape are welded to opposite sides of the opening of the net bag, respectively. The material of the welding tape to be welded is the same as that of the lattice-like net film sheet 3 in the bag portion. For example, if the split yarn is made of a polyethylene resin, a strong carrying portion cannot be obtained unless the carrying tape is also made of a polyethylene resin. The welding is performed by welding the peripheral edges of the tape in the three directions to the grid-like net film sheet 3 having the opening edge, and forming a U-shaped welding portion 6 in the figure.
Is formed. By welding in this manner, the shape of the net film sheet portion surrounded by the welding portion 6 is stabilized, so that the welding portion becomes strong. Along the opening edge, a hand-held tape 2 and a grid-like net film sheet 3
Is welded to form a square shape in which the four sides are fused, whereby the strength is improved, and the entire inner area of the square shape is hand-held, and the tip of the tape 2 and the grid-like net film sheet 3 are welded. This will increase the strength of the handpiece. The carrying tape 2 shown in FIG. 2 is a single piece of integrally formed tape, which is made into two pieces of tape, and the respective ends are welded to the opening edges on both sides, and then, as shown in FIG. 4 can be fused. Also, as shown in FIG. 4, one of the hand-held tapes 2 is extended and the pressure-sensitive adhesive layer 5 is provided at the free end thereof, and after the product is inserted into the bag, the release paper S is peeled off.
The tip of one hand tape can be joined to the top tip of the other hand tape with an adhesive layer 5. In this case, the length of the portion protruding from the opening edge of the other carrying tape can be selected in the range of 0 to 20 cm. 0
In the case of cm, the other carrying tape corresponds to a base film piece described later.

As another aspect of the present invention, a film patch 7 of the same quality as the hand-held tape 2 is provided on the inner side of the bag at the opening edge where the tip of the hand-held tape 2 of the hand-held net bag is welded.
As shown in FIG. 5, the three-sided peripheral edge of the hand-held tape 2 is heated in a U-shape as shown in FIG. 2, with the opening edge of the net bag sandwiched between the film application piece 7 and the tip of the hand-held tape. The carrying tape 2 can be attached by welding. In this case, the tip of the hand-held tape 2 and the film application piece 7 are directly welded through the hole of the net film sheet.
The material of the split yarn of the net bag and the material of the carrying tape need not necessarily be the same, but surprisingly, the strength of the carrying is much greater if the same resin material is used as the net film sheet. Further, as described above, when the U-shaped portion is welded to the periphery of the square shape or the inside thereof is entirely welded, a very durable hand-held portion is formed, and a net with a hand-held bag for packaging suitable for storing a heavy item. It becomes a bag. Further, in the embodiment of FIG. 6 of the present invention, the base film piece 8 made of a resin film of the same quality as the net film sheet is provided on at least three sides of the outer or inner side of the opening edge with which the tip of the hand-held tape 2 abuts. And the front end of the hand-held tape 2 is joined to the base film piece 8 with a pressure-sensitive adhesive layer. In this embodiment, an adhesive layer 5 is provided at the tip of the hand-held tape 2, and a release paper S is attached to the adhesive layer 5, so that it can be prepared separately from the net bag. In this case, after the product is stored in the net bag, the hand-held tape 2 can be joined to the opening edge.
The base film piece 8 needs to be a film of the same quality as the split yarn of the lattice net film from the viewpoint of welding strength. As shown in FIG. 7 and FIG. 8, the net bag with a handbag for product packaging of the present invention has a square bottom shape by providing a gusset fold at the bottom or side edge employed in a normal product packaging bag. can do. 7 shows a bag having a square bottom structure manufactured by providing a gusset fold at the bottom, and FIG. 8 shows a bag manufactured by providing a gusset fold G at a side edge. In order to manufacture these gusset-folded portions, an anti-welding agent layer 9 is applied so that the middle portion of the net film to be gusset-folded in FIGS. 7 and 8 is not welded in the step of welding the side edge portions. By applying the anti-welding agent layer 9, two gussets can be simultaneously performed in one step in the thermocompression bonding step of the gusset folded portion at the bottom portion or the side edge portion. For the anti-fusion agent layer 9, a known anti-fusion agent such as a printing ink layer (particularly, an ink layer without a pigment), oil, or wax can be used.

[0008]

According to the net bag with a handbag for product packaging of the present invention, since the split yarn of the grid-like net film near the welded portion is fixed, the handbag portion and the side edge which are disadvantages of the net film bag are formed. The strength of the part was improved. Therefore, it can also be used as a product packaging bag for heavy products such as canning. In addition, as an advantage of the net film, there is an advantage that the air permeability and the visibility are good, and further, the volume of dust in the used packaging bag in the case of disposal is reduced.

[Brief description of the drawings]

FIG. 1 is a plan view of an example of a net film used in the present invention.

FIG. 2 is a plan view of a net bag with a handbag for packaging goods according to one embodiment of the present invention.

FIG. 3 is a plan view a and a cross-sectional view b of a net bag with a handbag for product packaging according to one embodiment.

FIG. 4 is a cross-sectional view of a net bag with a handbag for packaging products according to one embodiment.

FIG. 5 is a cross-sectional view of a net bag with a handbag for product packaging according to one embodiment.

FIG. 6a is a plan view of a bag portion of a net bag with a handbag for packaging goods according to one embodiment, and FIG. 6b is a cross-sectional view of a separated handbag tape combined therewith.

FIG. 7 is a perspective view of a net bag with a handbag for product packaging according to one embodiment in which the bottom is formed into a square bottom structure by gusset folding.

FIG. 8 is a perspective view of a net bag with a handbag for merchandise packaging according to one embodiment in which the left and right side edges are gusset-folded into a square bottom structure.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Side edge welding part 2 Hand carrying tape 3 Lattice net film sheet 4 Upper hand carrying tape 5 Adhesive layer 6 Welding part 7 Film backing piece 8 Unit film piece 9 Welding inhibitor layer a Double lattice surface b Single lattice surface c Void surface A Bag part B Handbag part G Gazette fold S Release paper

Claims (10)

[Claims] 1. A grid-like net film sheet bag body in which split yarns of thermoplastic resin having a width of 0.5 to 5 mm are laid vertically and horizontally with a gap larger than the width of the split yarns. At the opening edge, at least 3 tips of the end of a handbag made of thermoplastic resin film of the same quality as the split yarn
A net bag with a handbag for product packaging, characterized in that the peripheral edge is heat-welded. 2. The net bag according to claim 1, wherein the bag body has a square bottom shape formed by a gusset folding structure provided at a bottom portion. 3. The bag according to claim 1, wherein the bag body has a square bottom structure formed by a gusset folded structure provided on a side edge. 4. The net bag as claimed in claim 1, wherein the lattice-like net film sheet is welded at the intersection of the vertical and horizontal split yarns. 5. The bag body is formed by half-folding a lattice-like net film sheet and heat-sealing the bag with a width including two or more split yarns along the side edge and parallel to the side edge of the bag body. 5. A net bag with a handbag for packaging a product according to claim 1, wherein the bag portion is a bag body portion having both side edges fixed to the body portion. 6. A grid-like net film sheet bag body in which split yarns of thermoplastic resin having a width of 0.5 to 5 mm are laid vertically and horizontally with a gap larger than the width of the split yarns. It is characterized in that the tip of a hand-held tape is bonded by an adhesive to a hand-held mounting portion formed by thermally welding at least three peripheral edges of a thermoplastic resin base film piece of the same quality as the split yarn to the opening edge. Net bag with handbag for product packaging. 7. The net bag according to claim 6, wherein the bag body has a square bottom shape by a gusset folding structure provided at the bottom. 8. The net bag according to claim 6, wherein the bag body has a square bottom structure by a gusset folding structure provided on a side edge. 9. The net bag according to claim 6, wherein the lattice-like net film sheet is welded at the intersection of the vertical and horizontal split yarns. 10. The bag body is formed by half-folding a grid-like net film sheet and heat-sealing the bag with a width including two or more split yarns along the side edge and parallel to the side edge of the bag body. 10. The bag according to claim 6, wherein the bag is formed by fixing both side edges of the body.