CN104869833A - Produce freshness-retaining packaging bag, produce-containing packaging body using same, and produce freshness-retaining method - Google Patents
Produce freshness-retaining packaging bag, produce-containing packaging body using same, and produce freshness-retaining method Download PDFInfo
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- CN104869833A CN104869833A CN201380066521.0A CN201380066521A CN104869833A CN 104869833 A CN104869833 A CN 104869833A CN 201380066521 A CN201380066521 A CN 201380066521A CN 104869833 A CN104869833 A CN 104869833A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D33/00—Details of, or accessories for, sacks or bags
- B65D33/01—Ventilation or drainage of bags
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- Packging For Living Organisms, Food Or Medicinal Products That Are Sensitive To Environmental Conditiond (AREA)
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- Storage Of Fruits Or Vegetables (AREA)
Abstract
The invention provides a produce freshness-retaining packaging bag, which comprises a perforated synthetic resin film, wherein through-holes are provided in the perforated synthetic resin film, and the outer surface of the produce freshness-retaining packaging bag is such that when the maximum thickness and the minimum thickness of the perforated synthetic resin film in the region up to 10 mm from the outer periphery of the through-holes are Tmax and Tmin respectively, the ratio Tmax/Tmin between the maximum thickness and the minimum thickness is 1.05 to 8.00.
Description
Technical field
The present invention relates to vegetable and fruit fresh-keeping packaging bag, use the package body that vegetable and fruit is housed and the vegetable and fruit preservation method of this vegetable and fruit fresh-keeping packaging bag.
Background technology
Vegetable and fruit also continues to breathe after harvesting, breathes more active deterioration and is more easily in progress.The breathing of vegetable and fruit is inhibited under the hypoxemia, high carbon dioxide environment of appropriateness compared with air.In such a situa-tion preserve vegetable and fruit time, the deterioration of vegetable and fruit can be suppressed, chase after ripe.
In recent years, as the packing method of vegetable and fruit, the method for the freshness keeping vegetable and fruit can be used.This is called as MA (modified atmospheres, Modified Atmosphere) technology of packing, hypoxemia, the high carbon dioxide condition (patent document 1-4) of appropriateness compared with air of vegetable and fruit is realized being suitable for preserving by regulating the respiration rate of the vegetable and fruit packed with packaging material and the balance of the gas transmission rate of packaging material.But when MA packaging uses the film be made up of the material of polypropylene or polyethylene and so on to pack vegetable and fruit, Air permenbility is not enough sometimes.In this case, need to cause vegetable and fruit to carry out abnormal breathing for because the oxygen amount in package body is not enough, promote the countermeasure (patent document 5-7) of the problem of deterioration.
In patent document 5-7, in order to solve such problem, as controlling the respiration rate of vegetable and fruit, keeping the method for freshness, proposing following method, that is, being used in film the perforated film being formed with multiple fine through or non-through hole or otch.
That is, Patent Document 5 discloses a kind of perforated film, it is provided with the hole that average diameter is less than 100 μm, and every 1 square metre is provided with less than 1000 these holes.Describe by such setting, the respiration rate of vegetable material (vegetable and fruit) can be reduced.
In addition, Patent Document 6 discloses following technology, that is, form at the multilayer film that at least innermost layer is made up of hot-melt resin layer the fine through or non-through hole that a large amount of aperture is several μm ~ tens μm, control the oxygen transmission rate of this multilayer film thus.Describe by arranging the oxygen transmission rate that can realize high 5 ~ 10 times compared with common perforated film like this.
Disclose following technology in the technology recorded in patent document 7, that is, packaging bag has more than one otch, and controls the total of the length of the otch of every 100g vegetable and fruit at 0.08mm ~ 20mm.Describing by implementing this technology, can handling ease be realized and there is the oxygen flow speed that conforms to characteristics such as the respiration rates of vegetable and fruit and the good packaging bag with MA effect of the outward appearance of film.
Patent document 1: Japanese Unexamined Patent Publication 4-53445 publication
Patent document 2: Japanese Unexamined Patent Publication 7-170907 publication
Patent document 3: Japanese Laid-Open Patent Publication 63-44837 publication
Patent document 4: Japanese Laid-Open Patent Publication 61-259982 publication
Patent document 5: Japanese Unexamined Patent Publication 2-85181 publication
Patent document 6: Japanese Unexamined Patent Publication 9-252718 publication
Patent document 7: Japanese Unexamined Patent Publication 2007-186248 publication
Summary of the invention
The problem that invention will solve
But, utilizing the technology recorded in documents 5-7 can promote the deterioration of the vegetable and fruit caused by the abnormal breathing of vegetable and fruit, from the viewpoint of this, the degradation of vegetable and fruit still can be made to produce deviation by changing preservation condition.
Therefore, the invention provides the technology of the degradation deviation of the vegetable and fruit that a kind of suppression produces because of the change of preservation condition.
The present inventor etc. produce the deviation of the degradation of vegetable and fruit reason to the change because of preservation condition is studied.Found that, the change of preservation condition causes the respiratory capacity of vegetable and fruit to change, thus affects the degradation of vegetable and fruit.
Therefore, the present inventor etc. in order to provide a kind of can corresponding vegetable and fruit preservation condition change vegetable and fruit fresh-keeping packaging bag and conduct in-depth research.Result obtains following opinion, that is, in order to suppress the deviation of the degradation of the vegetable and fruit produced by the change of preservation condition, effectively by the thickness optimization of the porose synthetic resin film of the through hole neighboring area of the outer surface of vegetable and fruit fresh-keeping packaging bag.
The thickness of porose synthetic resin film of hole periphery to the through hole being arranged at porose synthetic resin film such as the present inventor makes further research, find that the maximum gauge of porose synthetic resin film of hole periphery and the yardstick of the ratio of minimum thickness are as suppressing the design guideline of the deviation of the degradation of the vegetable and fruit produced because of the change of preservation condition to be effective, thus complete the present invention.
According to the present invention, providing a kind of vegetable and fruit fresh-keeping packaging bag, is the vegetable and fruit fresh-keeping packaging bag be made up of porose synthetic resin film,
Above-mentioned porose synthetic resin film is provided with through hole,
At the outer surface of this vegetable and fruit fresh-keeping packaging bag, the maximum gauge of the above-mentioned porose synthetic resin film apart from the region within the periphery 10mm of above-mentioned through hole is set to Tmax, minimum thickness is when being set to Tmin, above-mentioned maximum gauge is 1.05 ~ 8.00 with the ratio Tmax/Tmin of above-mentioned minimum thickness.
In addition, according to the present invention, providing a kind of package body that vegetable and fruit is housed, is utilize the vegetable and fruit fresh-keeping packaging bag of the invention described above to be sealed to form by vegetable and fruit.
In addition, according to the present invention, provide a kind of vegetable and fruit preservation method, use the vegetable and fruit fresh-keeping packaging bag of the invention described above to pack vegetable and fruit.
According to the present invention, the deviation of the degradation of the vegetable and fruit produced because of the change of preservation condition can be suppressed.
Accompanying drawing explanation
Above-mentioned purpose and other objects, feature and advantage, by the preferred embodiment of the following stated and subsidiary the following drawings thereof definitely.
Fig. 1 is the sectional view of the manufacturing installation of the manufacture method of vegetable and fruit fresh-keeping packaging bag for illustration of present embodiment.
Fig. 2 is the major part amplification sectional view of the manufacturing installation of the manufacture method of vegetable and fruit fresh-keeping packaging bag for illustration of present embodiment.
Fig. 3 is the major part stereogram of the manufacturing installation of the manufacture method of vegetable and fruit fresh-keeping packaging bag for illustration of present embodiment.
Detailed description of the invention
Below, accompanying drawing is used to be described embodiments of the present invention.Should illustrate, in whole accompanying drawings, identical inscape mark same-sign, suitably omits the description.
The vegetable and fruit fresh-keeping packaging bag of present embodiment is made up of the porose synthetic resin film being provided with one or more through holes.
This porose synthetic resin film is constructed as follows, that is, by vegetable and fruit fresh-keeping packaging bag outer surface apart from through hole periphery 10mm within scope (hereinafter also referred to as " neighboring area, hole ".) the maximum gauge of porose synthetic resin film is set to Tmax, minimum thickness is when being set to Tmin, above-mentioned maximum gauge is 1.05 ~ 8.00 with the ratio Tmax/Tmin of above-mentioned minimum thickness.By making the neighboring area, hole of the outer surface at vegetable and fruit fresh-keeping packaging bag, the maximum gauge of porose synthetic resin film is above-mentioned specific scope with the ratio Tmax/Tmin of minimum thickness, the change of the preservation condition of vegetable and fruit can be tackled, therefore, it is possible to suppress the deviation of the degradation of vegetable and fruit, stably obtain fresh-keeping effect.Here, region (neighboring area, hole) within the periphery 10mm of the distance through hole of the outer surface of vegetable and fruit fresh-keeping packaging bag refers to, from the central point of through hole to draw straight line by the periphery (periphery) of through hole time, on straight line, from the intersection point of the periphery of this straight line and through hole along and the central point rightabout of through hole away from the scope of the position of 10mm.
Described in the problem one that invention will solve, the respiratory capacity of vegetable and fruit changes along with the change of preservation condition.
When using the storage bag be made up of existing perforated film, the preservation condition of the oxygen amount and vegetable and fruit that are supplied to packaging bag has nothing to do, and is certain all the time.Therefore, existing storage bag cannot tackle the change of the respiratory capacity of the vegetable and fruit of the change with preservation condition.That is, the change that the oxygen amount required for vegetable and fruit occurs with the change of preservation condition cannot be tackled, the degradation generation deviation of vegetable and fruit.
On the other hand, vegetable and fruit fresh-keeping packaging bag according to the present embodiment, because the maximum gauge of the porose synthetic resin film of neighboring area, hole meets above-mentioned specified conditions with the ratio Tmax/Tmin of minimum thickness, so the oxygen amount being supplied to packaging bag can be made corresponding with the change of the respiratory capacity of the vegetable and fruit of the change with preservation condition.This reason is not very clear, but it is high to think that reason is the compliance of service condition change, and service condition changes and causes the quantity delivered of oxygen to change.
In addition, vegetable and fruit fresh-keeping packaging bag according to the present embodiment, even if when service condition change, also can suppress the deterioration of the freshness of vegetable and fruit for more time.In addition, such as the good vegetable and fruit of outward appearance can also be displayed in the market.
In addition, vegetable and fruit fresh-keeping packaging bag according to the present embodiment, when the maximum gauge of the porose synthetic resin film of neighboring area, hole meets above-mentioned specific condition with the ratio Tmax/Tmin of minimum thickness, the deviation of the degradation of the vegetable and fruit produced because of the change of preservation condition can not be suppressed, therefore, it is possible to stably keep the freshness of vegetable and fruit between longer-term by the kind of vegetable and fruit and weight restriction ground.For this point, be described in detail in embodiment described later.
In present embodiment, in the neighboring area, hole of the outer surface of vegetable and fruit fresh-keeping packaging bag, the maximum gauge of porose synthetic resin film is more than 1.05 with the ratio Tmax/Tmin of minimum thickness, is preferably more than 1.50.By such setting, even if when service condition changes, from the viewpoint of the stability of the size in hole, the deviation of the degradation of vegetable and fruit also stably can be suppressed further.In addition, in the neighboring area, hole of the outer surface of vegetable and fruit fresh-keeping packaging bag, the maximum gauge of porose synthetic resin film is less than 8.00 with the ratio Tmax/Tmin of minimum thickness, is preferably less than 6.00.By such setting, even if when service condition changes, from the viewpoint of the stability of the size in hole, the deviation of the degradation of vegetable and fruit also stably can be suppressed further.
In present embodiment, in the neighboring area, hole of the outer surface of vegetable and fruit fresh-keeping packaging bag, the maximum gauge Tmax of porose synthetic resin film suitably can select according to the kind of vegetable and fruit.The maximum gauge Tmax of porose synthetic resin film is such as 16 μm ~ 400 μm, is preferably 20 μm ~ 300 μm.
In addition, in the neighboring area, hole of the outer surface of vegetable and fruit fresh-keeping packaging bag, the minimum thickness Tmin of porose synthetic resin film suitably can select according to the kind of vegetable and fruit.The minimum thickness Tmin of porose synthetic resin film is such as 15 μm ~ 60 μm, is preferably 20 μm ~ 50 μm.
Next, the through hole being arranged at porose synthetic resin film is described.
The flat shape of the through hole of the flat shape of the through hole of the outer surface of this vegetable and fruit fresh-keeping packaging bag and the inner surface of this vegetable and fruit fresh-keeping packaging bag is not particularly limited, and such as, has the shapes such as circle, polygon and gap.In addition, the through hole of present embodiment also can be the otch being arranged at film.Here, " circle ", is not limited to positive circle, can be circular.In addition, than circular, also can be ellipse, semicircle or crescent shape." polygon " shape that can be triangle, quadrangle and pentagon etc. be impaled by the line segment of more than three.Should illustrate, from the viewpoint of perforate operation etc., preferably the flat shape of the through hole of the flat shape of the through hole of the outer surface of this vegetable and fruit fresh-keeping packaging bag and the inner surface of this vegetable and fruit fresh-keeping packaging bag is roughly the same shape.
In addition, when forming the through hole of seam shape, need the balance that can regulate the respiration rate of vegetable and fruit and the gas transmission rate of packaging material.
Preferably the average pore size (diameter) of the outer surface of this vegetable and fruit fresh-keeping packaging bag and the through hole of inner surface is little as much as possible, is preferably respectively 20 μm ~ 2000 μm, is more preferably 30 μm ~ 800 μm.By the average pore size of through hole in above-mentioned scope, when using the condition change of the environment of this vegetable and fruit fresh-keeping packaging bag, also can keep the freshness of vegetable and fruit, and can stably suppress vegetable and fruit to generate mould further.Should illustrate, from the viewpoint of the productivity ratio of porose synthetic resin film, when the average pore size of through hole is more than 20 μm, excellent vegetable and fruit fresh-keeping packaging bag can be obtained.When the average pore size of through hole is below 2000 μm, can maintains and will obtain the suitable hole count needed for perforated area ratio, therefore from the viewpoint of fresh-keeping quality precision, excellent vegetable and fruit fresh-keeping packaging bag can be obtained.
In addition, when the shape of through hole is formed as seam shape, as long as the diameter of long axis direction is such as less than 2000 μm, just without any problem.Should illustrate, when the shape of through hole is discoid shape, the perforated area of through hole is tried to achieve as follows, that is, such as, is divided into the several shapes being easy to calculate shape and carrys out reference area, then calculate the total of each area.
In addition, the through hole being arranged at porose synthetic resin film can be the formation that liquid is oozed out.Now, even if hole plug in appearance, as long as can the liquid such as water seepage.In addition, such as, also can by controlling aperture, under being designed to normal pressure, water oozes out hardly, only has vacuum pre-cooling to ooze out and the form that discharges.
When the through hole being arranged at porose synthetic resin film is otch, the shape being arranged at the otch of film is not particularly limited.Otch can be straight line, also can be that many straight lines link, also can be the shape from the be full of cracks of the end development linearity in hole such as ellipse or circle, also can be the such shape with curve part of S font, U-shaped, semicircle, wave mode, the shape with angle that V-shape, L font, H font, T font, W font, コ font, × symbol are such.The shape of otch is not limited to shown shape here.The shape of otch can combine multiple use.
To the processing of the otch of film, can cut with the sharp keen cutter that cutter is such, punching can be carried out with the mould of the otch that can form desired shape.In addition, laser also can be utilized to process.
The processing of otch is not particularly limited period.Can carry out when the making of film, also can carry out when bag or after bag.Carry out adding man-hour with the state of volume, can with printing, forms the parallel fabrication simultaneously such as gap, also can processing with resting the head on when the automatic packaging machine such as formula machine or vertical machine packs vegetable and fruit.In addition, the processing of otch can handwork, even 1 bag expanding also can easily make.
Next, the perforated area ratio in hole is described.
At outer surface and the inner surface of the vegetable and fruit fresh-keeping packaging bag of present embodiment, the perforated area ratio R 1 during 40 DEG C of porose synthetic resin film suitably can be selected according to the kind of vegetable and fruit.Perforated area ratio R 1 is such as 1.0 × 10
-6% ~ 5.0 × 10
-2%, is preferably 1.0 × 10
-5% ~ 5.0 × 10
-3%.By in above-mentioned scope, even if when service condition changes, the deviation of the degradation of vegetable and fruit also can be suppressed further.
In addition, at outer surface and the inner surface of the vegetable and fruit fresh-keeping packaging bag of present embodiment, the perforated area ratio R 2 during 5 DEG C of porose synthetic resin film suitably can be selected according to the kind of vegetable and fruit.Perforated area ratio R 2 is such as 5.0 × 10
-7% ~ 2.5 × 10
-2%, is preferably 5.0 × 10
-6% ~ 2.5 × 10
-3below %.By in above-mentioned scope, even if when service condition changes, the deviation of the degradation of vegetable and fruit also can be suppressed further.
In addition, the outer surface of the vegetable and fruit fresh-keeping packaging bag of present embodiment or inner surface, the perforate rate of change that calculated by following formula (1) according to above-mentioned perforated area ratio R 1 and R2 is such as 5 ~ 50, is preferably 8 ~ 30.By such setting, the deviation of the degradation of the vegetable and fruit produced because of the change of preservation condition can be suppressed further.
Formula: perforate rate of change={ (R1-R2)/R2} × 100 (1)
Next, the moisture-vapor transmission in hole is described.
From the viewpoint of the fresh-keeping effect improving further the vegetable and fruit under high temperature, 40 DEG C of porose synthetic resin film, 90%RH time moisture-vapor transmission be such as 4g/m
2more than it, be preferably 20g/m
2more than it.In addition, 40 DEG C, 90%RH time the upper limit of moisture-vapor transmission be not particularly limited, but from the viewpoint of preventing from wilting, such as, be 400g/m
2below it.
Next, the material of porose synthetic resin film is described.
As the synthetic resin forming porose synthetic resin film, as long as the packaging that can be used in vegetable and fruit is just not particularly limited, the polyester based resin such as various polyethylene and ethylene copolymer, polypropylene, polyvinyl chloride, polystyrene, acrylic resin, PET, PLA can be enumerated, the polyamide series resin etc. such as 6 nylon.They can be homopolymers, also can be copolymers of more than two kinds, also can be the blends containing two or more these homopolymers or copolymer.
As above-mentioned various polyethylene and ethylene copolymer, more specifically, can enumerate copolymer or the ionomers etc. such as high density polyethylene (HDPE), medium density polyethylene, low density polyethylene (LDPE), LLDPE, metallocene-LLDPE, vinyl-vinyl acetate copolymer, ethylene-acrylic acid copolymer, ethylene-propylene copolymer, ethene-alpha-olefin copolymer, also can be they or they and other resin blend of more than two kinds.
In addition, the film that above-mentioned illustrative molding synthetic resin can be obtained uses with the form of monofilm, also can use with the form of the multilayer film of more than 2 layers.
The forming method of film is not particularly limited, can use extrude, blow molding, the method such as calendering.When film is shaping, also as required by mixing for the additives such as antifoggant, also can mix resin of more than two kinds.In addition, also stretch processing, annealing etc. can be implemented to film.The film of sealant can be set on these film surfaces, also can in order to give the film that certain function is coated with.Further, these films can be transparent, also can be opaque, in addition, can be the films of printing.
From the viewpoint of price, physical property, particularly preferably use can thermosealed antifog stretched polypropylene films, low density polyethylene films, LLDPE film, metallocene catalysed polyethylene is as synthetic resin film.
In addition, when the content packed in vegetable and fruit fresh-keeping packaging bag is weight thing, as synthetic resin film, can use by dry laminating, extrude compound, coextrusion to form multilayer film resin molding to the film composite polyethylene of tensionless winkler foundation polypropylene, oriented polypropylene, tensionless winkler foundation nylon, tensile nylon, stretched polyester etc.
The thickness of the film that the vegetable and fruit fresh-keeping packaging bag in present embodiment uses is not particularly limited, such as, be 15 μm ~ 400 μm.If lepthymenia, then may intensity deficiency.On the other hand, if film is blocked up, then manufacturing cost increases, and therefore practicality reduces.Further, these films can be transparent, also can be opaque, also can be the film that effects on surface imposes printing in addition.
Next, the manufacture method of the vegetable and fruit fresh-keeping packaging bag of present embodiment is described.
In order to obtain the vegetable and fruit fresh-keeping packaging bag of present embodiment, need the position providing holes in the regulation of processing film forming or bag-shaped film.But, utilize the method manufacturing above-mentioned existing perforated film in the introduction to obtain the neighboring area, hole of the outer surface of this packaging bag in present embodiment, the vegetable and fruit fresh-keeping packaging bag that the maximum gauge of porose synthetic resin film meets above-mentioned specific condition with the ratio Tmax/Tmin of minimum thickness is very difficult.Specifically, the vegetable and fruit fresh-keeping packaging bag of present embodiment can carry out Altitude control to manufacture by each factor such as shape, the energy of laser, the irradiation distance of laser of the brace table to the film carried as perforation object.Like this, in order to obtain the vegetable and fruit fresh-keeping packaging bag that can suppress the deviation of the degradation of the vegetable and fruit produced because of the change of preservation condition of present embodiment, the above-mentioned each factor of Altitude control is particularly important.
In the neighboring area, hole of the outer surface at vegetable and fruit fresh-keeping packaging bag using previous methods to manufacture, even if the ratio Tmax/Tmin of the maximum gauge of porose synthetic resin film and minimum thickness under the same conditions providing holes when, each value manufactured also changes.That is, according to manufacture method in the past, the repeatability of the deformation extent of through hole periphery is low.
On the other hand, the manufacture method of vegetable and fruit fresh-keeping packaging bag according to the present embodiment, can obtain the deterioration of stabilization checking vegetable and fruit or the vegetable and fruit fresh-keeping packaging bag of corruption.In addition, the manufacture method of vegetable and fruit fresh-keeping packaging bag according to the present embodiment, can obtain the high and indeformable through hole of repeatability.Specifically, when the ratio Tmax/Tmin of the maximum gauge and minimum thickness that utilize said method to be manufactured on the porose synthetic resin film in neighboring area, hole of outer surface meets the packaging bag of 1.05 ~ 8.00 this specific conditions, the shape of the through hole of setting suitably can change according to variations in temperature.
This reason is still not fully aware of, but thinks that reason is, by each factor of Altitude control on film during providing holes, can obtain indeformable aperture portion.That is, by each factor of Altitude control on film during providing holes, indeformable hole can be set.Thus, think and can play periphery stiffening effect to the periphery of aperture portion, therefore along with expansion or the contraction of the air caused by variations in temperature, the shape of through hole suitably changes.
Below, an example of the manufacture method of the vegetable and fruit fresh-keeping packaging bag of present embodiment is shown.But the manufacture method of the vegetable and fruit fresh-keeping packaging bag of present embodiment is not limited to following example.
The manufacture method of the vegetable and fruit fresh-keeping packaging bag below illustrated is the method for the laser processing technology adopting the roller employed with groove.
More specifically, such as, following method is adopted to bore a hole to film.
First, Fig. 1 and Fig. 2 is the sectional view of the manufacturing installation of the manufacture method of vegetable and fruit fresh-keeping packaging bag for illustration of present embodiment, and Fig. 3 is major part stereogram.Below, an example of the manufacture method of the vegetable and fruit fresh-keeping packaging bag of Fig. 1-3 pairs of present embodiments is used to be described.
According to the manufacturing installation of Fig. 1, by roll out synthetic resin film 2 that roller 1 rolls out by between laser irradiation device 3 and rotary supporting roller 4 time, utilize the light beam of laser irradiation device 3 pairs of synthetic resin film 2 irradiated with pulse laser.By such setting, the hole identical with the shape of the light beam irradiated can be set at synthetic resin film 2.
The synthetic resin film 2 utilizing said method to be provided with hole can utilize take up roll 5 to reel.Should illustrate, 2 deflector rolls 6 are set in the front and back of rotary supporting roller 4.
In addition, the upper end of rotary supporting roller 4 is positioned at the upside of the line of the upper end relative to connection 2 deflector rolls 6.Therefore, it is possible to pressing synthetic resin film 2 makes itself and rotary supporting roller 4 closely sealed, the location of laser irradiating position can be carried out and the generation of striped can be prevented.
In addition, be provided with via rotary supporting roller 4 in the manufacturing installation of Fig. 1 and roll out roller 1 and take up roll 5.In the manufacturing installation of this Fig. 1, deflector roll 6 is separately positioned on rotary supporting roller 4 and rolls out between roller 1 and between rotary supporting roller 4 and take up roll 5.In addition, dancer 7 is separately positioned on and rolls out between roller 1 and deflector roll 6 and between deflector roll 6 and take up roll 5.By such setting, suitable tension force can be applied by dancer 7 pairs of synthetic resin films 2.
In addition, Compressed Gas is set at laser irradiation device 3 and imports path 8, in the irradiation of laser, utilize spray nozzle front end 9 (with reference to Fig. 2) to spray Compressed Gas along laser beam to synthetic resin film 2.
Fig. 2 is the major part amplification sectional view of the laser irradiation device 3 of the manufacturing installation shown in Fig. 1.
The manufacture method of vegetable and fruit fresh-keeping packaging bag according to the present embodiment, as shown in Figure 2, can make synthetic resin film 2 move in the below of the spray nozzle front end 9 of laser irradiation device 3.
In addition, because pulse laser 10 passes through guide path 11 by the emergent light department of the Chinese Academy of Sciences (lens) 12 boundling, therefore, it is possible to form conical shaped beam 13 and irradiated to synthetic resin film 2 by spray nozzle front end 9.Now the internal diameter of spray nozzle front end 9 is greater than the beam diameter of passed through pulse laser 10.In addition, by the focal position of the pulse laser 10 of the emergent light department of the Chinese Academy of Sciences (lens) 12 boundling preferably in the position exposing outside any towards film of the opposition side of the laser entrance face from synthetic resin film 2.
As described above, by irradiating conical shaped beam 13, this beam irradiation position melting of synthetic resin film 2, decomposing, be vaporized, thus form hole 14.
In addition, the spacing of boring a hole in the hole 14 of synthetic resin film 2 synchronously can adjust by making the pulse frequency of the translational speed of synthetic resin film 2 and pulse laser 10.Utilize 1 laser irradiation device, usually can open 20 ~ 1000 holes 14 in 1 second, therefore also can accelerate the translational speed of synthetic resin film 2, realize high production rate.
The shape of boring a hole in the hole 14 of synthetic resin film 2 becomes the shape almost identical with the conical shaped beam 13 by synthetic resin film 2, can output the hole of shape certain all the time.Should illustrate, the hole of conical mesa-shaped can be made close to cylindrical by the focal length expanding the emergent light department of the Chinese Academy of Sciences (lens) 12.
In addition, near the spray nozzle front end 9 of the guide path 11 of laser irradiation device 3, Compressed Gas is set as described above and imports path 8.By such setting, in the irradiation of laser, Compressed Gas can be sprayed along laser beam to synthetic resin film 2.
In addition, for the flow of Compressed Gas, polluting the emergent light department of the Chinese Academy of Sciences (lens) 12 to prevent the analyte produced because of perforation from invading from spray nozzle front end 9, preferably the wind speed of spray nozzle front end 9 being set as 2 ~ 10m/s, being more preferably set as 3 ~ 6m/s.
In addition, Compressed Gas is not particularly limited, and such as, except compressed air, can use the non-active gas such as nitrogen, carbon dioxide.Compressed air is operationally safe from danger, also favourable in cost.Non-active gas can suppress the oxidation of the analyte of plastic foil, reduces coal, Jiao, melanism thing etc.
In the manufacture method of the vegetable and fruit fresh-keeping packaging bag of present embodiment, the face of the opposition side of laser entrance face is contacted with rotary supporting roller 4, supports synthetic resin film 2 by rotary supporting roller 4.In addition, in order to enable the analyte of synthetic resin film 2 be vaporized from the side contrary with laser entrance face, such as, as shown in Figure 3, the groove 15 corresponding with laser irradiating position can be set at rotary supporting roller 4.
Rotary supporting roller 4 shown in Fig. 3 has 5 grooves 15.When using such rotary supporting roller 4 and 5 laser irradiation devices, 5 row holes can be set at synthetic resin film 2.
Should illustrate, as the laser of present embodiment, be not particularly limited, such as, ruby laser, neodymium YAG laser, nd glass laser, carbon dioxide laser etc. can be enumerated.Wherein, carbon dioxide laser because energy efficiency is high, high-output power, easily remove heat, therefore particularly preferably use.
The manufacture method of vegetable and fruit fresh-keeping packaging bag according to the present embodiment, can at a high speed and productivity ratio highland providing holes on synthetic resin film.The shape in hole is determined, therefore, it is possible to output the hole of shape certain all the time by the shape of the light beam of pulse laser.
In addition, by the material of the synthetic resin film of the part of laser beam perforation, major part is decomposed, is vaporized, and is blown away by Compressed Gas.Therefore, the emergent light department of the Chinese Academy of Sciences (lens) of laser irradiation device also can not be decomposed thing pollute.
In addition, adjust the cycle of pulse laser and the translational speed of synthetic resin film by the number of units of selected laser irradiation device, can manufacturing hole there is density by sparse to the intensive porose synthetic resin film with any hole density.
Can the porose synthetic resin film of position in Altitude control aperture and hole thereby, it is possible to formed, the Tmax/Tmin that can obtain present embodiment meets the vegetable and fruit fresh-keeping packaging bag of specific condition.Should illustrate, for the selection of membrane material when making the vegetable and fruit fresh-keeping packaging bag of present embodiment and the selection of laser processing condition, in embodiment described later, compare with existing method for making, further describe.
Should illustrate, the manufacture method of the vegetable and fruit fresh-keeping packaging bag of present embodiment is not limited to the processing method of above-mentioned use laser, such as, can be punching processing, also can be hot pin processing.But, when adopting these processing methods, also need the various factors such as the temperature to hot pin, shape carry out Altitude control and combine.
For the vegetable and fruit fresh-keeping packaging bag of present embodiment, as the position of providing holes, be not particularly limited, when the vegetable and fruit that bull ladle installs, when sales counter displays, be preferably arranged on the position of easy ponding.So, can prevent because water slowly oozes out the deterioration of the quality of the vegetable and fruit caused, the internal condensation of packaging bag or at inner ponding.Therefore, consider from consumer angle, the vegetable and fruit that when market is displayed, outward appearance is good can be provided in.
In addition, the total open area of every 1 bag of the vegetable and fruit fresh-keeping packaging bag obtained by the manufacture method of present embodiment 40 DEG C time, such as, is that the content in every 100g bag is 1 × 10
-5~ 2mm
2left and right.
In the vegetable and fruit fresh-keeping packaging bag of present embodiment, packaging vegetable and fruit, more specifically, packs vegetable and fruit washed to the process water of packaging after results.
Vegetable and fruit entirety is containing large quantity of moisture, and these moisture evaporate by breathing mostly, thus condenses in packaging, preferably uses the vegetable and fruit fresh-keeping packaging bag of present embodiment to preserve.As the concrete example of vegetable and fruit, doederlein spikemoss herb can be enumerated, spinach, rape, water dish, the ninth of the ten Heavenly Stems romaine lettuce, asparagus, water spinach, lettuce, thyme, Salvia japonica, caraway, celery, rosemary, wild marjoram, lemon face cream, leek, lavender, small burnet, wool wood, pale reddish brown southern mustard, dandelion, nasturtium, sweet basil, rocket salad, Chinese celery, corchorus olitorius, celery, collard, shallot, cabbage, Chinese cabbage, crowndaisy chrysanthemum, romaine lettuce, asparagus lettuce, Petasites officinalis Moench, cauliflower, blue or green stalk dish, Japanese cryptotaenia stem and leaf, caraway, brussels sprout, broccoli, cauliflower, ginger, radish, carrot, burdock, radish, turnip, Ipomoea batatas, potato, Chinese yam, Chinese yam, taro, dioscorea japonica, large and taro, green pepper, pimiento, green chili, cucumber, eggplant, tomato, cherry tomato, pumpkin, balsam pear, gumbo, corn, green soy bean, snow pea, Kidney bean, broad bean, the fine and soft class of bacterium etc.In addition, fruit class, the fresh flower etc. such as oranges and tangerines, apple, pears, grape, blueberry, persimmon, strawberry are also effective.The state that they are cutting, so-calledly cut the dish, it is also effective for cutting fruit.
In present embodiment, the vegetable and fruit that water washed vegetable and fruit, rain or dew drench etc. can be packed when not dry, and therefore operability improves.In addition, for fresh-keeping on vegetable and fruit and by vegetable and fruit low temperature, removing moisture reduces this reason of moisture etc. to the impact of vegetable and fruit as early as possible, also can make all or part of evaporation rapidly of the moisture of vegetable and fruit.Under such circumstances, this vegetable and fruit vegetable and fruit fresh-keeping packaging bag loaded in present embodiment can be carried out sealing and vacuum pre-cooling.
The freshness of vegetable and fruit is such as by the impact of temperature, humidity.Should illustrate, vegetable and fruit is not particularly limited, and such as, preferably preserves in temperature 0 DEG C ~ 50 DEG C, humidity 10% ~ 98%.
The package body of present embodiment utilizes the vegetable and fruit fresh-keeping packaging bag of present embodiment to be sealed to form by vegetable and fruit.
In addition, the preservation method of present embodiment comprises following operation, that is, use the fruit fresh-keeping packaging bag of present embodiment to pack the operation of vegetable and fruit.Vegetable and fruit is packaged in after in vegetable and fruit fresh-keeping packaging bag, needs sealing.
As encapsulating method, be not particularly limited, the methods such as heat seal, adhesive tape, rubber band, cord can be enumerated, the methods such as glue stickup, slide fastener.
The package body internal surface area of vegetable and fruit fresh-keeping packaging bag can set according to the shape of packaging vegetable and fruit, size, density etc.Further, the package body internal surface area of the vegetable and fruit fresh-keeping packaging bag of every 100g vegetable and fruit is such as 100cm
2~ 5000cm
2, be preferably 200cm
2~ 3000cm
2.
In present embodiment, from the viewpoint of the respiratory capacity suitably controlling vegetable and fruit according to temperature environment, can be following formation.
The oxygen permeating amount of the porose synthetic resin film of every 100g vegetable and fruit is 50mL/100gm
2it atm ~ 50000mL/100gm
2it atm, is preferably 60mL/100gm
2it atm ~ 10000mL/100gm
2it atm.
In addition, from the viewpoint of the carrying out of the deterioration of further stabilization checking vegetable and fruit, the state of oxygen concentration before being broken a seal by this package body in the package body of vegetable and fruit is housed, such as, is more than 0.1% and is less than 19%, being preferably 1% ~ 17%.
In addition, from the viewpoint of the freshness of further stable maintenance vegetable and fruit, the weight reduction rates that the package body entirety of vegetable and fruit is housed is every 1 day more than 0.05 % by weight and is less than 1 % by weight, is preferably 0.08 % by weight ~ 0.9 % by weight.
Above, embodiments of the present invention are set forth, but these are only illustration of the present invention, also can adopt various formation other than the above.
Embodiment
Below, by embodiment and comparative example, the present invention is described, but the present invention is not limited to these embodiments.
(embodiment 1)
At antifog biaxial-stretched polypropylene films (hereinafter also referred to as " antifog OPP ".) bottom of bag of (Gunze Inc., trade name: Silfan MV2, thickness 40 μm, bag size 140mm × 180mm), under 25 DEG C of conditions, 9 diameters 180 μm (average pore sizes) are set and perforated area 0.026mm at 40 DEG C
2hole.Should illustrate, the total open area at 40 DEG C is 0.24mm
2.Thus, vegetable and fruit fresh-keeping packaging bag is obtained.In addition, the flat shape of the through hole of the flat shape of the through hole of the outer surface of the vegetable and fruit fresh-keeping packaging bag obtained and the inner surface of vegetable and fruit fresh-keeping packaging bag is circle, is roughly the same shape.
The present embodiment middle punch following methods carries out.
First, prepare rotary supporting roller, this rotationally supported roller on the roller of diameter 318mm, width 725mm, from apart from the position of two ends 150mm with 100mm interval, to form the groove that the shape shown in Fig. 3 has 5 road width 5mm, degree of depth 5mm.On the other hand, as laser irradiation device, prepare the carbon dioxide laser of power output 150 watts.Respectively 5 these laser irradiation devices are arranged accordingly with the position of the groove of the position with rotary supporting roller of irradiating laser.Should illustrate, to be 10 ~ 15mm with the distance of film, mode is arranged laser irradiation device.
Next, using the device shown in Fig. 1-2, by making rotary supporting roller rotate with peripheral speed 60m/ minute, thus on rotary supporting roller, making film with movement in translational speed 60m/ minute, from each laser irradiation device with 10 irradiated with pulse laser per second.Now, path is imported to Compressed Gas and apply pressure 1.0kg/cm
2the nitrogen pressure of (normal pressure), in the irradiation of laser, is blown into nitrogen from spray nozzle front end along laser beam.
(embodiment 2)
In antifog OPP (Japan's textile company system, trade name: Pylen film-FG:P5562, thickness 25 μm, bag size 160mm × 190mm) the bottom of bag, with 10mm interval, 4 diameters are set under 25 DEG C of conditions and are 600 μm (average diameters) and perforated area 0.287mm at 40 DEG C
2hole.Should illustrate, the total open area at 40 DEG C is 1.15mm
2.Like this, vegetable and fruit fresh-keeping packaging bag is obtained.Should illustrate, perforation uses the method identical with embodiment 1 to carry out.
(embodiment 3)
In antifog OPP (Japan's textile company system, trade name: Pylen film-FG:P5562, thickness 25 μm, bag size 160mm × 190mm) the bottom of bag, with 10mm interval, 4 diameters 600 μm (average diameters) are set under 25 DEG C of conditions and perforated area 0.224mm at 40 DEG C
2hole.Should illustrate, the total open area at 40 DEG C is 0.90mm
2.Like this, vegetable and fruit fresh-keeping packaging bag is obtained.Should illustrate, perforation uses the method identical with embodiment 1 to carry out.
(embodiment 4)
In antifog OPP (Japan's textile company system, trade name: Pylen film-FG:P5562, thickness 25 μm, bag size 160mm × 190mm) the bottom of bag, with 10mm interval, 5 diameters 600 μm (average diameters) are set under 25 DEG C of conditions and perforated area 0.129mm at 40 DEG C
2hole.Should illustrate, the total open area at 40 DEG C is 0.64mm
2.Like this, vegetable and fruit fresh-keeping packaging bag is obtained.Should illustrate, perforation uses the method identical with embodiment 1 to carry out.
(embodiment 5)
In antifog OPP (Japan's textile company system, trade name: Pylen film-FG:P5562, thickness 25 μm, bag size 160mm × 190mm) the bottom of bag, with 10mm interval, 10 diameters 600 μm (average diameters) are set under 25 DEG C of conditions and perforated area 0.051mm at 40 DEG C
2hole.Should illustrate, the total open area at 40 DEG C is 0.51mm
2.Like this, vegetable and fruit fresh-keeping packaging bag is obtained.Should illustrate, perforation uses the method identical with embodiment 1 to carry out.
(comparative example 1)
In antifog OPP (Japan's textile company system, trade name: Pylen film-FG:P5562, thickness 25 μm, bag size 160mm × 190mm) the bottom of bag, with 10mm interval, 4 diameters 6000 μm (average diameters) are set under 25 DEG C of conditions and perforated area 27.792mm at 40 DEG C
2hole.Should illustrate, the total open area at 40 DEG C is 111.17mm
2.Punching processing is carried out in perforation.Like this, vegetable and fruit fresh-keeping packaging bag is obtained.
(comparative example 2)
As laser irradiation device, use the laser irradiation device that groove is not set at rotary supporting roller, in addition, obtain vegetable and fruit fresh-keeping packaging bag by the method identical with embodiment 5.
In addition, for each mensuration and evaluation, use as described below and packed the package body of green soy bean.
Each green soy bean loading the water washed state of average 180g in the vegetable and fruit fresh-keeping packaging bag of embodiment 1 ~ 5, comparative example 1 and 2, makes the package body of 20 bag heat sealing machine sealings.The package body packed is filled in mode down bottom bag in carton.Should illustrate, this package body internal surface area that package body of green soy bean is housed is as follows respectively.The package body internal surface area of every 100g green soy bean of embodiment 1 is 280cm
2, the package body internal surface area of every 100g green soy bean of embodiment 2 ~ 5 and comparative example 1 and 2 is 337cm
2.
In addition, above-mentioned package body is preserved 2 days at 40 DEG C after preserving 5 days at 5 DEG C, follows the trail of the quality comparison such as outward appearance, smell, food flavor of green soy bean.
(embodiment 6)
In the vegetable and fruit fresh-keeping packaging bag of embodiment 1, load the broccoli of the water washed state of average 180g, make the package body that broccoli is housed of 20 bag heat sealing machine sealings.Should illustrate, the package body internal surface area of this every 100g broccoli is 280cm
2.To the above-mentioned package body that broccoli is housed, after also preserving 5 days at 5 DEG C, preserve 2 days at 40 DEG C, follow the trail of the quality comparison such as outward appearance, smell of broccoli.
(assessment item)
The maximum gauge Tmax of the film of neighboring area, hole and minimum thickness Tmin: the thickness of the film of neighboring area, hole measures according to JIS K7130.Specifically, according to JIS K7130, the thickness of the film of multiple point optional in neighboring area, hole is measured.Then, by the multiple measurement results involved by the thickness of the film obtained maximum is set to Tmax, minimum of a value is set to Tmin.Should illustrate, unit is μm.Here, region (neighboring area, hole) within the periphery 10mm of the distance through hole of the outer surface of vegetable and fruit fresh-keeping packaging bag refers to, when drawing straight line from the central point of through hole by the periphery (periphery) of through hole, on straight line, from the intersection point of the periphery of this straight line and through hole along and the central point rightabout of through hole away from the scope of the position of 10mm.
Perforated area ratio: first, uses microscope (Keyence Inc., VH-6300) to measure the perforated area of the inner surface of the vegetable and fruit fresh-keeping packaging bag of 40 DEG C and 5 DEG C.The surface area of vegetable and fruit fresh-keeping packaging bag calculates with 2 times amount of bag size.Next, using according to the value of the perforated area that obtains and surface area and the value calculated by following calculating formula (1) as perforated area ratio.Should illustrate, unit is %.
Perforated area ratio=(perforated area/bag surface area) × 100 (1)
Perforate rate of change: calculated by following formula (A) according to the perforated area ratio R 2 (%) when the perforated area ratio R 1 (%) when 40 DEG C that are calculated by above-mentioned formula (1) and 5 DEG C.
Perforate rate of change={ (R1-R2)/R2} × 100 (A)
Oxygen permeating amount: the oxygen permeating amount of resin molding utilizes the method illustrated in following (1) ~ (5) to measure.Should illustrate, unit is mL/100gm
2it atm.
(1) preparation of bag
With the film production vegetable and fruit fresh-keeping packaging bag measuring oxygen permeating amount.Now, sealed by bag by heat seal, anti-block spills beyond film.For the size of the bag measured, the internal surface area of bag is set to 0.06m
2above.Should illustrate, following whole operations are carried out in an atmosphere.
(2) inclosure of nitrogen
After being sealed by bag by heat seal etc., aspirator etc. is used to carry out degassed to bag.Degassed until the two sides laminating of bag.Next, white hard injection tube is used to fill nitrogen (purity more than 99.9%) to this bag.The injection rate of gas is determined according to bag size, adds as much as possible in scope film not being applied to tension force, uses the scale of injection tube to measure.Should illustrate, degassed and injection that is nitrogen is undertaken by entry needle is thrust bag.When thrusting pin, sticking two-faced adhesive tape band on film, pastes the adhesive tape (hereinafter referred to as " PP adhesive tape ") of polypropylene screen from this two-sided tape.In addition, after extracting pin, clog pin hole with PP adhesive tape rapidly.The adhesive tape be pasted onto on bag controls at 4.5cm
2following area.In addition, when small pore membrane, note not clogging minute aperture.
(3) initial oxygen concentration measures
Measure the initial oxygen concentration (C in the bag of filling (t=0) after nitrogen
0).Gas in bag is sampled, tries to achieve the initial oxygen concentration (C in bag by gas chromatography (TCD)
0).C
0be less than 0.2%, when exceeding this value, again operate.Gas sampled for oxygen concentration determination is below 10cc.During injection gas chromatography, inject the gas sampled of about 1cc.
(4) preservation of bag
The bag determining initial oxygen concentration 23 DEG C, preserve under 60%RH (constant-temperature and constant humidity store) condition.Now, leave standstill in the mode preventing object to be placed on bag or the wind of fan of constant-temperature and constant humidity store directly blows.
(5) mensuration of bag internal oxygen concentration in preserving and the calculating of oxygen permeating amount
Bag internal oxygen concentration, to fill after nitrogen and from the total more than 3 of filling the oxygen concentration after more than 3 hours and measure in the scope of 1% ~ 7% more than 2.Elapsed time t (hr) and bag internal oxygen concentration (C
t) between need to there is proportionate relationship (coefficient correlation is more than 0.98), therefore again test when coefficient correlation is false.
The oxygen permeating amount of film is excessive and rising that is bag internal oxygen concentration is too fast, when can not eliminate this condition, similarly carries out after a part for film is fitted to make bag with the film of the known identical material being less than the film that oxygen permeating amount has been distinguished.Now, the part that other film known with the surface area of bag is fitted is removed, the value of the oxygen permeating amount of known membrane portions will be deducted from the oxygen permeating amount of trying to achieve as the oxygen permeating amount measuring film.The value of the film that oxygen permeating amount uses the elapsed time long, is calculated by following calculating formula (2).
F＝1.143×(C
t-C
0)×V/t/s (2)
Wherein,
F: oxygen permeating amount (mL/100gm
2it atm)
C
t: nitrogen fills rear bag internal oxygen concentration (%) after t hour
C
0: the bag internal oxygen concentration (%) after nitrogen filling
V: the amount (cc) of the nitrogen of filling
T: the elapsed time (hr) when filling from gas
S: the surface area (m of bag
2)
Moisture-vapor transmission: 40 DEG C, the moisture-vapor transmission of 90%RH measures according to JIS K7129:2008.Should illustrate, unit is g/m
2my god.
Oxygen concentration: 40 DEG C and 5 DEG C time the state of oxygen concentration before package body is broken a seal under, gather the air in package body, use gas-chromatography (GL Sciences Inc., GC323) to measure.Should illustrate, unit is %.
Weight reduction rates: 40 DEG C and 5 DEG C time weight reduction rates measure in the following order.First, for the weight of the bag of packaging 100g vegetable and fruit, by the weight (W0) of electronic balance determination test first day and the weight (W7) of the 7th day after on-test.Next, using the value that calculates according to the weight of bag obtained and by following calculating formula (3) as weight reduction rates.
Weight reduction rates=(W0-W7)/W0 × 100 (3)
Evaluation result involved by above-mentioned assessment item is shown in following table 1 and table 2.
Table 1
Table 2
The vegetable and fruit fresh-keeping packaging bag of embodiment 1 ~ 6 and comparative example 2 all uses laser irradiation device to bore a hole.In the vegetable and fruit fresh-keeping packaging bag of embodiment 1 ~ 6, the aperture of through hole does not almost have deviation.On the other hand, for the aperture of each through hole of vegetable and fruit fresh-keeping packaging bag being arranged on comparative example 2, the position of comparing, creates the deviation (poor) of 25 μm between maximum diameter of hole and minimum-value aperture.Aperture as each through hole in the vegetable and fruit fresh-keeping packaging bag of such comparative example 2 produces the reason of deviation, can enumerate to employ and groove, common laser irradiation device is not set at rotary supporting roller, thus lasing radiant heat, heat storage is in the reason of rotary supporting roller.Thus, think that the thermal diffusion of through hole periphery is slack-off, the aperture of uncontrollable each through hole.
For the vegetable and fruit fresh-keeping packaging bag of comparative example 2, at the outer surface of this vegetable and fruit fresh-keeping packaging bag, the maximum gauge of above-mentioned porose synthetic resin film apart from the region within the periphery 10mm of through hole is set to Tmax, minimum thickness is when being set to Tmin, the ratio Tmax/Tmin of maximum gauge and minimum thickness is more than 8.00.And when manufacturing multiple vegetable and fruit fresh-keeping packaging bag continuously by the method identical with comparative example 2, due to the radiant heat of laser, the aperture of each through hole of the packaging bag obtained produces deviation.Thus, for the method identical with comparative example 2, the sack that can tolerate commodity production cannot be obtained.
For the vegetable and fruit fresh-keeping packaging bag of embodiment 1 ~ 5, follow the trail of and have the package body of green soy bean to preserve at 5 DEG C the quality comparison such as outward appearance, smell, food flavor preserving the green soy bean of 2 days after 5 days at 40 DEG C packaging, result can keep 7 days good states altogether.On the other hand, the green soy bean using the vegetable and fruit preservation of packaged bag of comparative example 1 and 2 to preserve is wilted gradually and becomes and do not have sweet taste.
The package body of embodiment 6 is not packed green soy bean and packs broccoli in the vegetable and fruit fresh-keeping packaging bag of embodiment 1.Also follow the trail of the package body that broccoli is housed of embodiment 6 and preserve at 5 DEG C the quality comparison such as outward appearance, smell preserving the broccoli of 2 days after 5 days at 40 DEG C, result is same with the situation of packing green soy bean can keep totally 7 days good states.
For embodiment 1 ~ 5 vegetable and fruit fresh-keeping packaging bag packaged by green soy bean, embodiment 6 vegetable and fruit fresh-keeping packaging bag packaged by broccoli, be the typical example that the respiratory capacity of per unit weight in various vegetable and fruit is many.Wherein, the respiratory capacity of broccoli is maximum in vegetable and fruit.Further, when using vegetable and fruit fresh-keeping packaging bag described in embodiment 1 ~ 6, the quality comparison such as outward appearance, smell of the green soy bean that the respiratory capacity of per unit weight is many and broccoli can keep totally 7 days good states.According to this result, if think the vegetable and fruit fresh-keeping packaging bag using embodiment, then compared with green soy bean or broccoli, when the few vegetable and fruit of respiratory capacity of packaging per unit weight, the quality comparison such as the outward appearance of packaging vegetable and fruit, smell also can be made to keep totally 7 days good states.
This application advocates the priority based on No. 2013-210189, the Japanese publication Patent that No. 2012-289039, the Japanese publication Patent of application on December 28th, 2012 and on October 7th, 2013 are applied for, is incorporated herein full content disclosed in it.
Claims (18)
1. a vegetable and fruit fresh-keeping packaging bag is the vegetable and fruit fresh-keeping packaging bag be made up of porose synthetic resin film,
Described porose synthetic resin film is provided with through hole,
At the outer surface of this vegetable and fruit fresh-keeping packaging bag, the maximum gauge of the described porose synthetic resin film apart from the region within the periphery 10mm of described through hole is set to Tmax, minimum thickness is when being set to Tmin, described maximum gauge is 1.05 ~ 8.00 with the ratio Tmax/Tmin of described minimum thickness.
2. vegetable and fruit fresh-keeping packaging bag according to claim 1, wherein, the flat shape of the described through hole of the flat shape of the described through hole of the outer surface of this vegetable and fruit fresh-keeping packaging bag and the inner surface of this vegetable and fruit fresh-keeping packaging bag is roughly the same shape.
3. vegetable and fruit fresh-keeping packaging bag according to claim 2, wherein, the average pore size of the outer surface of this vegetable and fruit fresh-keeping packaging bag and the described through hole of inner surface is respectively 20 μm ~ 2000 μm.
4. vegetable and fruit fresh-keeping packaging bag according to claim 1, wherein, the average pore size of the outer surface of this vegetable and fruit fresh-keeping packaging bag and the through hole of inner surface is respectively 20 μm ~ 2000 μm.
5. the vegetable and fruit fresh-keeping packaging bag according to any one of Claims 1 to 4, wherein, the described maximum gauge Tmax of described porose synthetic resin film is 16 μm ~ 400 μm.
6. the vegetable and fruit fresh-keeping packaging bag according to any one of Claims 1 to 5, wherein, the described minimum thickness Tmin of described porose synthetic resin film is 15 μm ~ 60 μm.
7. the vegetable and fruit fresh-keeping packaging bag according to any one of claim 1 ~ 6, wherein, at outer surface and the inner surface of this vegetable and fruit fresh-keeping packaging bag, the perforated area ratio R 1 (%) during 40 DEG C of described porose synthetic resin film is 1.0 × 10
-6% ~ 5.0 × 10
-2%.
8. the vegetable and fruit fresh-keeping packaging bag according to any one of claim 1 ~ 7, wherein, at outer surface and the inner surface of this vegetable and fruit fresh-keeping packaging bag, the perforated area ratio R 2 (%) during 5 DEG C of described porose synthetic resin film is 5.0 × 10
-7% ~ 2.5 × 10
-2%.
9. vegetable and fruit fresh-keeping packaging bag according to claim 8, wherein, the value of the outer surface of this vegetable and fruit fresh-keeping packaging bag or the perforate rate of change of inner surface is 5 ~ 50, described perforated area ratio R 2 (%) during the described perforated area ratio R 1 (%) during according to described porose synthetic resin film 40 DEG C of described perforate rate of change and described porose synthetic resin film 5 DEG C, is calculated by following formula (1)
Perforate rate of change={ (R1-R2)/R2} × 100 (1).
10. the vegetable and fruit fresh-keeping packaging bag according to any one of claim 1 ~ 9, wherein, 40 DEG C of described porose synthetic resin film, 90%RH time moisture-vapor transmission be 4g/m
2my god ~ 400g/m
2my god.
11. vegetable and fruit fresh-keeping packaging bags according to any one of claim 1 ~ 10, wherein, are provided with multiple described through hole at this vegetable and fruit fresh-keeping packaging bag.
12. vegetable and fruit fresh-keeping packaging bags according to any one of claim 1 ~ 11, wherein, pack after results until vegetable and fruit water washed the process of packaging.
13. vegetable and fruit fresh-keeping packaging bags according to any one of claim 1 ~ 12, wherein, the oxygen permeating amount of the described porose synthetic resin film of every 100g vegetable and fruit is 50mL/100gm
2it atm ~ 50000mL/100gm
2it atm.
14. 1 kinds of package bodies that vegetable and fruit is housed utilize the vegetable and fruit fresh-keeping packaging bag according to any one of claim 1 ~ 13 to be sealed to form by vegetable and fruit.
15. package bodies that vegetable and fruit is housed according to claim 14, wherein, described in this every 100g that package body of vegetable and fruit is housed, the package body internal surface area of the described vegetable and fruit fresh-keeping packaging bag of vegetable and fruit is 100cm
2~ 5000cm
2.
16. package bodies that vegetable and fruit is housed according to claims 14 or 15, wherein, this is equipped with oxygen concentration in the package body of vegetable and fruit under the state before the package body Kaifeng of this being equipped with vegetable and fruit, is more than 0.1% and is less than 19%.
17. package bodies that vegetable and fruit is housed according to any one of claim 14 ~ 16, wherein, this weight reduction rates that package body entirety of vegetable and fruit is housed is every day more than 0.05 % by weight and is less than 1 % by weight.
18. 1 kinds of vegetable and fruit preservation methods, use the vegetable and fruit fresh-keeping packaging bag according to any one of claim 1 ~ 13 to pack vegetable and fruit.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012289039 | 2012-12-28 | ||
| JP2012-289039 | 2012-12-28 | ||
| JP2013-210189 | 2013-10-07 | ||
| JP2013210189A JP2014141299A (en) | 2012-12-28 | 2013-10-07 | Packaging bag for keeping freshness of garden stuff, packaging of garden stuff using the same, and method for keeping freshness of garden stuff |
| PCT/JP2013/084227 WO2014103920A1 (en) | 2012-12-28 | 2013-12-20 | Produce freshness-retaining packaging bag, produce-containing packaging body using same, and produce freshness-retaining method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104869833A true CN104869833A (en) | 2015-08-26 |
Family
ID=51021004
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201380066521.0A Pending CN104869833A (en) | 2012-12-28 | 2013-12-20 | Produce freshness-retaining packaging bag, produce-containing packaging body using same, and produce freshness-retaining method |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP2014141299A (en) |
| CN (1) | CN104869833A (en) |
| WO (1) | WO2014103920A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016037312A (en) * | 2014-08-08 | 2016-03-22 | 住友ベークライト株式会社 | Condensation suppression packaging bag |
| JP7308590B2 (en) * | 2016-11-09 | 2023-07-14 | 住友ベークライト株式会社 | Packaging film manufacturing method, packaging bag manufacturing method, packaging container manufacturing method, lid material manufacturing method, package manufacturing method |
| JP7326721B2 (en) * | 2018-10-29 | 2023-08-16 | 住友ベークライト株式会社 | Freshness-preserving packaging container for fruits and vegetables, package containing fruits and vegetables, and method for preserving freshness of fruits and vegetables |
| JP2020111350A (en) * | 2019-01-09 | 2020-07-27 | 住友ベークライト株式会社 | Bag material, package and freshness holding method of fruits and vegetables |
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| JP2010179030A (en) * | 2009-02-09 | 2010-08-19 | Toshiba Corp | Mammography apparatus |
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- 2013-10-07 JP JP2013210189A patent/JP2014141299A/en not_active Withdrawn
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- 2013-12-20 CN CN201380066521.0A patent/CN104869833A/en active Pending
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| Publication number | Publication date |
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| WO2014103920A1 (en) | 2014-07-03 |
| JP2014141299A (en) | 2014-08-07 |
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