JPH0771980B2 - Packing case for perishables - Google Patents

Description

TECHNICAL FIELD The present invention relates to a packaging material used for transportation, storage, and storage of perishables. More specifically, it has unprecedented good ventilation. At the same time, it relates to a novel packaging case for fresh food that can form an environment suitable for transportation or storage of fresh food, which can form a shade well.

[Prior Art] Conventionally, for example, so-called powders and granules such as feed are mainly used for articles transported in flexible containers, and grain,
So-called fresh produce such as vegetables, fruits, seafood and fresh flowers is not transported.

The reason is that materials that can create an environment suitable for transporting fresh food have not been obtained.

That is, hitherto, as a transportation material, a cloth woven using a split yarn of synthetic fibers or the like, or a woven cloth with rubber, polyvinyl chloride, an ethylene-vinyl acetate copolymer elastomer is topped, laminated, or coated. The tarpaulin, which is coated by the above method, has been mainly used.

Furthermore, in recent years, mesh-like cloths made of synthetic fibers having a large fineness can be seen.

However, in these fabrics, the former has poor air permeability, while the latter has a mesh shape, even if the air permeability is satisfied,
Since it is impossible to prevent exposure to direct sunlight and water droplets, it was difficult to maintain the freshness of perishables and prevent them from decaying or deteriorating when they were transported or stored.

[Problems to be Solved by the Invention] In view of the above points, an object of the present invention is to provide good air permeability, which was not found in conventional products, when transporting, storing or preserving fresh food. In addition, the present invention aims to provide a novel packaging case for perishable foods, which can provide a contradictory environment at the same time that it has a great shade forming effect.

[Means for Solving the Problems] In order to achieve the above-mentioned object, the fresh food packaging case of the present invention has the following configuration.

That is, the packaging case for perishables of the present invention is a packaging case for perishables, and at least a large number of narrow sheets have a multilayer structure, and the multilayer structure of the narrow sheets has a longitudinal direction of the tape. By definition, the width in the direction of the right angle is defined as the width, and at least a structure in which a part of the width is sequentially overlapped on a part of the next tape is formed, and It is characterized in that it has a large number of sewn portions that fix the overlap in a breathable manner, and that the packing material is formed in a sheet shape as a whole.

[Operation] Hereinafter, the present invention will be described in more detail.

In the present invention, the packing case for perishables is collectively referred to as the following.

That is, when fresh foods such as grains, vegetables, fruits, seafood, fresh flowers, and fresh produce such as fresh plants are transported by land, sea, or by air, for example, in containers, or the storage and storage of the fresh produce. In the present invention, the box-shaped, bag-shaped, or tube-shaped materials used for packing and storing the perishables when they are squeezed are collectively referred to as a perishable packaging case in the present invention.

FIG. 1 is a schematic model diagram showing an embodiment of a cylindrical packing case for a container using the packing material for fresh food according to the present invention.

In the packaging case 1 shown in FIG. 1, the enclosure 2 of the packaging case is made of a multi-layered sheet material described later. In addition, 3 is a reinforcing band part for reinforcing the whole packaging case, 4 is a hanging part for hoisting, and 5 is a part which can be opened and closed so that a transported article can be taken in and out.

The packaging case of the present invention is characterized by a sheet-like material used as an enclosure thereof, and in the sheet-like material, a large number of narrow sheets have a multilayer structure, and the narrow sheet has a multilayer structure. Defines a width as a width in the direction perpendicular to the longitudinal direction of the tape, and at least has a structure in which a part of the width is sequentially overlapped on a part of the next tape. , Has a large number of sewn portions that fix the overlap of these multiple tapes in a breathable manner, for example, the sewn has a certain inclination at or near the length of the tape, A plurality of pieces are sewn at a certain interval and are formed into a sheet-like packing material as a whole.

This structure will be described in more detail with reference to FIGS. 2A to 2C, 3A to 3C, and 4.

2A, 2B, 2C and 3A, 3B, 3C are model diagrams showing the cross-sectional structure of the sheet-like packing material used in the fresh food packing case of the present invention.

2A to 2C are model diagrams showing a sectional structure in the vicinity of the sewn portion of the packing material according to the present invention in which a large number of narrow sheets are sewn, and in FIG. Modeled as a tiled roof or a multi-layered overlapping structure such as a tiled roof, in which sheets S ₁ , S ₂ , S ₃ , S ₄ , S ₅ , S ₆ , S ₇ are overlapped while sequentially shifting their positions. It is shown in the figure. In the figure, arrow c indicates the forward direction from the upper layer side to the lower layer side of the multilayer structure. That is, here, the forward direction means that when the tape is used with the longitudinal direction of the tape being substantially parallel to or close to the bottom of the case, the overlapping direction of the tape is higher when viewed from the outside. It means that the tapes are arranged so as to overlap the tapes below.

FIG. 2B shows, in addition to that shown in FIG. 2A, narrow sheets S ′ ₁ , S ′ ₂ , S ′ ₃ , S ′ ₄ , S ′ ₅ ,
_{S '6,} S' ₇ are overlapped over and over again while sequentially shifting the position, the sheet material having a similar multi-layer overlapping structure will exhibit a double multi-layer structure used in symmetrically to the other one back 2 shows a packaging material according to the present invention configured as described above.

In FIG. 2C, the narrow sheets S ₁ , S ₂ , S ₃ , S ₄ , S ₅ , S ₆ , and S ₇ are sewn to form one layer, and the narrow sheet is as the position is superimposed shifted, narrow sheet _{S '1, S' 2,} S '3, S' 4, S '5, S'
_6, S _'7 another layer provided consisting illustrates an embodiment example and has a multilayer structure sheet material.

FIGS. 3A, 3B and 3C correspond to FIGS. 2A, 2B and 2C, respectively, and all of them show the adjacent sewn portions of the packing material according to the present invention in which a large number of narrow sheets are sewn. FIG. 6 is a model diagram showing a cross-sectional structure in the vicinity of a middle portion (a non-connected portion), showing narrow sheets S ₁ , S ₂ , S ₃ , S ₄ , S ₅ , S ₆ , S ₇ , and S ′ ₁ , S ′ _{2 , S '3, S' 4} , S '5, S' 6,
S ′ ₇ is a model showing a state in which adjacent narrow sheets have appropriate voids between adjacent narrow sheets.

FIG. 4 is a plan view schematically showing an example of a typical structure in one embodiment of the packaging material according to the present invention shown in FIGS. 2A to 2C and FIGS. Width sheet S ₁ ,
_{S 2, S 3, S 4} , S 5, S 6, S 7 showed a state in which almost equidistant are stitched by a sewing machine cliff is sewn under the width direction, and is formed into a sheet It is a schematic plan view.

In the figure, dotted lines 6, 7, 8, and 9 are sewing machine suture lines, and the ee cross-sectional view is a cross-sectional view in the vicinity of the sewn portion (suture line portion) of the above-described FIGS. Sectional view is third
It corresponds to the cross-sectional views in the vicinity of the middle of the adjacent sewn portions (non-sewn portions) in FIGS.

Due to the peculiar structure of the packing material according to the present invention, as shown in the model diagrams of FIGS. 3A to 3C, air can enter and exit as indicated by an arrow a, while raindrops and waterdrops It cannot be penetrated inside by being repelled as shown by the arrow b, and direct sunlight does not enter the inside from any direction, and it has high breathability and shielding, and also has good water repellency and waterproof effect. Can be done. In particular, by using a water-repellent or oil-repellent processed thin sheet, a very high degree of water and oil repellency can be obtained.

2A, B, 3A, and B, the arrow c direction indicates the forward direction of the multilayer structure from the upper layer side to the lower layer side in the multilayer structure, and the packaging material according to the present invention is
The above-mentioned high breathability is used in the forward direction, that is, as described above, the tapes are arranged so that the upper tape is overlapped with the lower tape when viewed from the outside. It is preferable for obtaining a shielding effect, and further good water repellency and waterproof effect.

In the present invention, the narrow sheet refers to a sheet having a width narrower than the length, and the width is not particularly limited, but is preferably a fabric having a width of about 1 mm to 500 mm. A sheet-like material such as a knitted fabric, a non-woven fabric, or a film, and a knitted woven fabric or a film-like material is preferable in terms of further enhancing the effect of the present invention and workability during production.

As the method for producing the narrow sheet, a method of weaving with a desired weaving width with a ribbon loom or a tape loom, a method of weaving with a wide width weaving machine, and a method of melt cutting to a desired width with a fusing cutter or the like on or after weaving Further, a method for obtaining a desired narrow woven fabric by further weaving the easily-dissolvable fiber in a boundary portion to be slit and treating it in the liquid that dissolves the easily-dissolvable fiber after weaving, after obtaining the film in a wide width There is a slit in a narrow width, and a specific manufacturing method may be appropriately selected in consideration of workability, specifications of a desired narrow sheet, and the like.

A narrow sheet is not preferable because it is generally difficult to produce the sheet when the width is less than 1 mm, and it is generally difficult to form a fabric with a multi-layer structure.
If the width exceeds 500 mm, there is a tendency that there is no great difference from the ordinary cloth in terms of functionality, particularly the breathability, which is the most characteristic feature of the present invention, which is not preferable. Therefore, the more preferable sheet width is in the range of 2 mm to 100 mm, further preferably 3 mm to 30 mm. Further, it may be a deformed narrow sheet having an average width in the range of about 1 mm to 500 mm and having an appropriate unevenness or corrugation. In addition, the cross-sectional shape of the narrow sheet is "he" in addition to flat dough pieces.
Or ",", ",",],], ",
It may have a cross-sectional structure that is bent into a ∫, I, ~ shape or the like.

The structure of the narrow sheet may be usually a single sheet, but in some cases, a tubular sheet or a sheet having a double structure such as a double woven fabric is more preferable in durability and the like. You can get things. The sheet width is the width of both ends of the sheet in the short direction. However, in the case of a bent or curved cross-sectional shape, it means the width of both ends in the bent or curved state. Further, if it is tubular, it means the diameter of the tube.

Narrow width sheets are used for woven fabrics, knitted fabrics, non-woven fabrics, etc. in terms of strength, abrasion resistance, anti-misalignment, durability, flexibility when used as a packaging case for perishables, especially for transportation. A fiber product having a high density is preferable. In this case, the fibers used for the narrow sheet base material include, for example, polyethylene terephthalate or a copolymer thereof, polybutylene terephthalate or a copolymer thereof. Polyesters such as coalesces, polyamides and copolymers thereof,
Acrylic polymer, polyurethane, polyethylene, ultra high molecular weight polyethylene, polypropylene and its copolymers, polyvinylidene chloride, aromatic sulfide (PP
S), aramid fiber, carbon fiber synthetic fiber is preferred,
These fibers may be used alone or in combination according to the purpose, such as composite, mixed spinning, mixed twist, and mixed weave.

Among these, narrow sheets using composite yarns that are a combination of polyester fibers and polyamide fibers, and further different fiber yarns such as high shrinkage fiber yarns and low shrinkage fiber yarns obtained by copolymerizing polyester fiber with isophthalic acid. A narrow sheet that uses a combination of composite yarn and a narrow sheet that uses a water-sensitive fiber obtained by spinning polyvinyl alcohol with a low degree of fighting, etc. (Improvement of bulkiness), and good bulkiness is obtained, whereby the adhesion between the narrow sheets is eliminated, the air permeability is further improved, and higher performance is obtained, which is preferable. Further, as a method of obtaining bulkiness, there is also a method of forming a narrow sheet by using a yarn obtained by subjecting a single multifilament to bulky processing such as Woolly processing.

Further, in order to obtain a multilayer structure fabric having higher bulkiness and air permeability, for example, when the multilayer structure fabric is formed by using a stretchable narrow sheet containing a polyurethane fiber or the like, the tape can be appropriately adjusted. After the temporary adhesion under tension, the narrow tapes are sewn together, and then the temporary adhesion is released, the tape becomes corrugated, and a larger void structure between the sheets can be obtained.

Further, stretchable narrow tapes containing polyurethane fibers and the like, and narrow tapes made of other fibers are arranged alternately,
It is also preferable to apply an appropriate tension to a stretchable narrow tape containing a polyurethane fiber or the like to form a fabric and release the tension, since the obtained corrugations are different from each other because larger voids can be provided.

On the other hand, the film-like sheet is a film made of polyester, aromatic sulfide (PPS), polypropylene, polyethylene, polyamide, vinyl chloride, polystyrene, etc., or a copolymer thereof, and further, these biaxially stretched films are strong. It is preferable in terms of durability.

The multi-layer structure using the narrow sheet referred to in the present invention means a structure having a superposed structure or a superposed structure composed of a plurality of narrow sheets as shown in FIGS. 2A to 2C and 3A to 3C. It is a generic term to indicate. That is, a fabric having a superposed structure is a fabric in which narrow sheets are stacked in multiple layers as shown in FIG. 2A. For example, when viewed in a tiled roof or a longitudinal section structure. It has a structure similar to that of Mio.
Further, a fabric having a superposed structure is a fabric obtained by stacking two or more fabrics formed by a narrow sheet having a cross-sectional structure as shown in FIG. 2C described above in multiple layers. Therefore, FIG. 2B has both the superposed structure and the superposed structure.

There are various specific methods for forming a multi-layered sheet material by using a large number of narrow sheets, and the method is not necessarily limited, but, for example, FIGS. 2A and 3A.
As a method of forming a superposed structure sheet packing material such as
A thin sheet with a water-soluble glue (polyvinyl alcohol, acrylic glue, etc.) impregnated into a cylinder of an appropriate size whose surface is coated with a fluororesin such as polytetrafluoroethylene is stacked as desired. Twisting a cylinder under the width while rotating it in sequence and drying it, and then temporarily adhering adjacent narrow width sheets to each other, then cutting in the axial direction of the cylinder, and a temporary adhering sheet material with a superposed structure by the narrow width sheets. To get Then, the thus-obtained narrow-width sheet temporary adhesive sheet material is machined at a desired interval in the forward direction of the multilayer structure (superposed structure), that is, in the direction in which the narrow sheet is not turned up. Then, the narrow sheets are sewn together at regular intervals or at random intervals, and then the sheet material is immersed in warm water to dissolve and remove the water-soluble glue used for temporary adhesion. By doing so, the packaging material according to the present invention can be obtained.

As a method of obtaining a temporary adhesive sheet, in addition to a method of impregnating a narrow sheet with a water-soluble sizing agent in advance and winding a tape in a undried state on a cylinder, followed by drying and temporary adhesion, After wrapping the narrow sheet around the cylinder, apply the water-soluble paste formulation to the narrow sheet using a spray or brush,
There is a method of obtaining a temporary adhesive sheet by drying.

The sewing method for sewing narrow sheets is done with a sewing machine. According to this method, it is possible to process the superimposed structure sheet material in the forward direction, which is practical in that wrinkles can be prevented as much as possible and the work is simple.

Also, after temporarily adhering, when sewing a narrow sheet by sewing with a sewing machine to make it into a sheet material, it is also possible to overlap the seam reinforcing tape at the seam and sew the reinforcing tape together to improve durability. It is preferable for the purpose. Further, after the sheet material is formed, it is also preferable to perform ironing and / or hot pressing in the forward direction of the multilayer structure in order to more firmly stabilize the multilayer structure.

Further, it is more preferable to subject the sheet material to a water repellent treatment depending on the application. The water repellent treatment can be easily performed by applying an appropriate water repellent such as a silicon-based or fluorine-based agent by a spray method, a padding method, a dipping method, a coating method, or the like.
Among them, the padding method is the most excellent in that the water repellent agent can be uniformly applied to the sheet material, and even at the time of the padding processing, as in the sewing machine method described above, the superposed structure sheet material The treatment in the direction is effective in preventing the occurrence of wrinkles, and the padding method is preferable in these respects.

Next, when using a multilayer structure sheet material comprising the narrow sheet of the present invention to form a packaging case for perishables, the sheet material may be used 100%, and other sheet material materials may be used. It may be a combination.

Further, many of the narrow sheets have a multilayer structure, and the multilayer structure of the narrow sheets defines the width in the direction perpendicular to the longitudinal direction of the tape as a width, and a part of the width. Has at least a structure of sequentially overlapping on a part of the next tape, and has a large number of sewn portions for fixing the overlap of the many tapes in a breathable manner, and is formed into a sheet shape as a whole. The packaging material according to the present invention in which the formed sheet-shaped portion is formed only on a part of the sheet material may be used.

When the packaging material according to the present invention is used in the packaging case for perishables according to the present invention, as described above, when the tape is used with the longitudinal direction of the tape being substantially parallel or inclined to the bottom portion of the case. , It is practical to say that the tapes are arranged so that the upper tape overlaps the lower tape when viewed from the outside, but it is not always limited to such usage. However, they can be used under any appropriate direction.

The fresh food packing case of the present invention can be simply constructed by appropriately cutting the above-mentioned sheet material of the present invention, or sewing or joining the same.

[Examples] Next, examples will be shown, but this is for clarifying the present invention, and the present invention is not limited or restricted by the examples.

Example 5 A polyester denier yarn consisting of 36 filaments is used as a warp yarn, a polyester filament yarn consisting of 250 filaments and 48 filaments is also used as a weft yarn, and a narrow width sheet is obtained by weaving a fabric with a width of 30 mm with a tape loom. It was

This narrow sheet was dipped in a water-soluble polyvinyl alcohol sizing agent, and rolled up to a desired width on a cylindrical roll whose surface was coated with a fluororesin while rotating the roll so that the overlapping width was 15 mm. The sheet thus obtained was dried and then cut in the axial direction of the roll to obtain a sheet temporarily bonded with the water-soluble sizing agent.

Then, the sheet is subjected to sewing with a normal sewing machine at equal intervals of 20 mm in the width direction of the narrow sheet and in a direction (forward direction) in which the narrow sheet does not turn up (forward direction) to form a superposed structure multilayer structure fabric. Got

The cloth is soaked in hot water at 80 ° C., washed with water to dissolve and remove the water-soluble sizing agent, and then dried to be a narrow sheet with a width of 30 mm, with an overlapping width of 5 mm and a stitching pitch width of 20 mm. A packaging material according to the present invention having a structure as shown in FIGS. 2A and 3A was obtained.

Then, using the material, a cylindrical packaging case whose schematic structure is shown in Fig. 1 was manufactured, and transportation tests of vegetables were carried out, and it was best for transportation and storage of vegetables having both shade effect and ventilation effect. It was confirmed that the above environment was obtained, and it could be stored and transported for a long period of time without dying.

[Advantages of the Invention] The packaging case for perishables of the present invention has the following excellent actions and effects by having the above-described configuration.

(1) A packaging case for transporting perishables can be constructed which has a very high air permeability while preventing direct sunlight from hitting the inside. Therefore, the packaging case needs breathability, and is optimal for storage and transportation of vegetables and the like that prefer shade.

(2) Having high breathability, waterproofness, shielding,
It is possible to easily configure a packaging case that has moisture permeability and is suitable for transporting perishables.

(3) With various combinations of different materials and narrow sheets of different hues, it has the above-mentioned composite function of light-shielding property and breathability, and also has a variety of colors, which makes it very rich in aesthetics and fashionability. It is possible to obtain a packaging case for transporting perishables or for storage / preservation that has never been seen before.

Further, by utilizing the characteristics such as the variety of colors, it is possible to easily make a packaging case or the like that is identified for each variety such as vegetables and fruits.

(4) Packing that can absorb light well and maintain high temperature while maintaining good ventilation by appropriately selecting the color and combination of colors of the narrow sheet to be used, the position to use, the size, etc. It is also possible to appropriately set various conditions such as a case or a packaging case in which a relatively high temperature is not reflected and the temperature is relatively high.

For example, use a black one, or a white one,
By properly combining the gray ones or the transparent ones and appropriately setting the use positions and sizes, it is possible to set various basic environment inside the packaging case.

[Brief description of drawings]

FIG. 1 is a schematic view showing a tubular packing case which is an example of an embodiment of the fresh food packing case according to the present invention. 2A, 2B and 2C are model diagrams showing a cross-sectional structure in the vicinity of a sewn portion of a packaging material according to the present invention in which a large number of narrow sheets are sewn. FIGS. 3A, 3B and 3C correspond to FIGS. 2A, 2B and 2C, respectively, and all of them show the adjacent sewn portions of the packing material according to the present invention in which a large number of narrow sheets are sewn. It is a model diagram showing a cross-sectional structure near the middle (non-sewn portion). FIG. 4 is a plan view schematically showing an example of a representative structure in one embodiment of the packaging material according to the present invention shown in FIGS. 2A to 2C and FIGS. 3A to 3C. _{S 1 ~S 7, S '1} ~S' 7: narrow sheet 1: packing case 2: Special fabric-like material 3: reinforcing band 4: hanging part 5: Transport product intake portion 6, 7, 8, 9: Sewing Stitched part Arrow a: Air flow direction Arrow b: Rain and water drop repelling direction Arrow c: Multi-layered forward direction

Claims (3)

[Claims] 1. A packing case for perishables, wherein at least a large number of narrow sheets have a multilayer structure, and the multilayer structure of the narrow sheets has a right angle with respect to the longitudinal direction of the tape. The width in the direction is defined as at least a part of the width is formed so as to be sequentially overlapped on a part of the next tape, and the overlap of the multiple tapes is fixed in a breathable manner. A packing case for perishables, which is made of a packing material having a large number of sewn portions and formed into a sheet shape as a whole. 2. A large number of narrow sheets have a multi-layer structure and are sewn so as to be ventilated from a gap between adjacent narrow sheets, and a portion formed into a sheet as a whole is one of packaging materials. The packaging case for perishables according to claim (1), characterized in that it is formed in the portion. 3. A packing case for perishable foods, wherein at least a large number of narrow sheets have a multilayer structure, and the multilayer structure of the narrow sheets has a right angle with respect to the longitudinal direction of the tape. The width in the direction is defined as a width, and at least a structure in which a part of the width is sequentially overlapped on a part of the next tape is formed, and the overlap of the large number of tapes is fixed so as to be breathable. The packaging material is made of a sheet as a whole and has a large number of sewn parts, and the tape is used with the longitudinal direction of the tape being approximately parallel to or close to the bottom of the case. When the tapes are overlapped, the tapes are arranged so that the upper tapes overlap the lower tapes when viewed from the outside. Packing case for the perishables listed.