JPH07110665B2 - Cold storage sheet for transportation of fresh flowers - Google Patents

Description

TECHNICAL FIELD The present invention relates to a cool storage sheet for transportation of fresh flowers and the like.

(Prior Art and Problems Thereof) In recent years, carnations, roses, chrysanthemums, orchids, etc. have been directly delivered from the production site to consumers, and
Many orchids are imported from foreign countries, and in the process of transportation, the fresh flowers cause evaporation of water due to breathing, generation of respiratory heat, etc., and due to stress due to vibration during transportation etc. In addition, the quality was low and the product value was low. Therefore, in the past, a cold storage agent has been placed in the shipping container in order to maintain freshness during shipping, but the conventional cold storage agent is a liquid or gel-like film that is packed with a non-breathable film. In the inside, water drops etc. are generated on the surface of the pack of the regenerator, and the water drops soak into the cardboard case etc. which is the container and wet the parchment paper etc. that wraps the fresh flowers inside, significantly reducing the commercial value. is the current situation. In addition, the conventional regenerator is put into a container in a frozen state, and the distribution of cold air inside becomes uneven, so that there is a problem that a sufficient freshness-retaining effect cannot be expected. Further, the conventional regenerator needs to be pre-cooled in a freezer in a large amount, which causes a problem that inventory space is increased.

(Means for Solving the Problems) The present invention has been devised in view of the above-mentioned conventional problems, and an object thereof is to provide a cold storage sheet capable of transporting fresh flowers or the like in a state where freshness is favorably maintained, The gist thereof is a cool storage sheet arranged in a transportation case that can be filled with fresh flowers and the like, and the cool storage sheet includes a breathable non-woven fabric on the front side, a partition sheet material in the central portion, and a back side sheet. An air-permeable plastic film that does not allow water to pass through, but has pores that allow air to pass through is heat-welded at a predetermined interval to form a bag-like space on the front and back sides, and a bag-like bag on the front side. A water-absorbing polymer capable of containing water and precooling is enclosed in the space, and an oxygen absorber (iron powder) is enclosed in the bag-shaped space on the back side.

(Function) When packing fresh flowers in a transport case and transporting them, the water-absorbent polymer inside the bag-shaped space on the front side is hydrated and cooled, and cool air is emitted from the water-absorbent polymer into the transport case during transportation. It is possible to obtain a good cold insulation state, and due to the action of the oxygen scavenger (iron powder) enclosed in the bag-shaped space on the back side, the oxygen in the transport case is adsorbed well in this bag-shaped space. It is possible to obtain a better freshness retention state.

(Example) Hereinafter, the Example of this invention is described based on drawing.

FIG. 1 is a cold-storable sheet used for transportation of fresh flowers and the like, and FIG. 2 is an enlarged view of a main part of a cross section taken along the line AA of this sheet.

In the figure, the packaging sheet 1 is formed by partitioning a number of bag-shaped spaces 1a into longitudinal and lateral grooves 1b to form a single sheet, which is shown in the sectional view of FIG. As described above, the water-permeable sheets S ₁ and S ₂ forming the front surface portion and the back surface portion are attached to each other at regular intervals to form the groove portion 1b,
A bag-shaped space portion 1a having a considerable space is formed between the groove portions 1b, 1b, and the granular water-absorbing resin 2 is provided inside the bag-shaped space portion 1a.
Is included in a considerable amount. The one shown in FIG. 2 is constructed by further adhering the waterproof sheet 3 to the surface of the water permeable sheet S ₁ on one side.

The water permeable sheets S ₁ and S ₂ are made of a sheet material that allows water and air to pass therethrough, and as such a sheet material, a fiber chamber of paper, non-woven fabric, woven fabric, knitted fabric, cotton or the like can be used. A sheet etc. are mentioned. Further, the waterproof sheet 3 is made of a water-impermeable sheet material such as polyethylene,
It is composed of plastic sheets such as polypropylene and polyvinyl chloride. Aluminum foil may be used instead of the plastic sheet.

Further, as the water-absorbent resin 2 enclosed in the bag-shaped space 1a, for example, a monomer such as a starch-acrylonitrile graft polymer hydrolyzate or a cellulose-acrylolithyl graft polymer hydrolyzate, and a crosslinking agent are used. Copolymers with, for example, crosslinked polyacrylamide and hydrolysates thereof, crosslinked sulfonated polyethylene, crosslinked poplar, JP-A-52-14
No. 689 and JP-A-52-27455, saponified vinyl ester-unsaturated carboxylic acid copolymer, crosslinked polyacrylic acid salt and acrylic acid-acrylic acid ester copolymer, crosslinked isobutylene -Maleic anhydride copolymer, cross-linked polyethylene oxide and the like. Further, a polymer having self-crosslinking property, for example, self-crosslinking polyacrylic acid, a resin described in JP-B-54-30710, or a polymer having at least a hydroxyl group and a carboxylate group in the molecule, for example, JP-B-54- The resin described in 37994 may be used. A water-absorbing resin obtained by polymerizing starch or cellulose with a water-soluble monomer and / or a monomer that becomes water-soluble by hydrolysis and a cross-linking agent as essential components and performing hydrolysis if necessary. May be.

The above water-absorbent resin may be used alone or in combination of two or more, and the water-absorbent performance is preferably about 20 to 2000 g / g, and the shape of the water-absorbent resin 2 is not particularly limited. Instead, it may have any shape such as powder, particles, flakes, and fibers.

As shown in FIG. 3, for example, the packaging sheet 1 configured as described above is provided with staples 4, 4 on the back side of the upper flap 5a of the upper side of the wreath feeding case 5 in which fresh flowers and the like can be packed.
It can be used by fixing it via the like. That is, as shown in FIG. 1, a bag-shaped space portion is formed on the longitudinal side edge of the packaging sheet 1.
The extending portions 1c, 1c having no 1a are integrally formed,
Staples 4, 4 and the like can be driven into the extending portions 1c, 1c, respectively, to fix the packaging sheet 1 to the back side of the upper flap 5a of the flower transport case 5.

Incidentally, this is the case for fixing the package sheet 1 on the back side of the upper flap 5a as, presoaked packaging sheet 1 in water, then must chilled given in the freezer is taken out, the water permeability sheet S ₂ Water permeates into the bag-shaped space 1a from the inside, and the water is absorbed by the water-absorbent resin 2 inside, and when frozen in this state, the water in the water-absorbent resin 2 cools and is stored in the flower transport case 5. If carnations, roses, etc. are packed and used for home delivery, etc., cold air will gradually be emitted from the water absorbent resin 2 during transportation and the inside of the flower transportation case 5 can be kept cool satisfactorily, and quality deterioration during transportation of fresh flowers. Can be minimized.

When this packaging sheet 1 is used, the packaging sheet 1
Even if dew condensation water occurs on the surface of the, the water-absorbent resin 2 inside can satisfactorily absorb the dew condensation water and the like, and even if the flower transportation case 5 is formed of cardboard or the like without dropping of the condensation water. There is no infiltration of water into the transportation case 5, and the reduction in strength of the transportation case 5 can be minimized.

Incidentally, the fixing of the packaging sheet 1 to the upper flap 5a can be performed not only by the staple 4 but also by using tapes such as gum tape, cloth tape or the like, or by using an adhesive or the like.

Further, if a laminate of polyethylene laminate, polypropylene laminate, and biphenyl film chloride laminate is laid inside the flower transport case 5, the extension portion 1c of the packaging sheet 1 can be heat-welded to the laminate material. When the extension part 1c is heat-sealed to these laminated materials, it is possible to continuously perform the fixing work to the flower transport case 5 of the packaging sheet 1 by using a separate sealing machine. It is also possible to create a line of.

In addition, in the case where the entire inside of the flower transport case 5 is laminated, the heat insulating effect is extremely good, and
The transport case 5 has excellent strength.

In this example, the packaging sheet 1 has a large number of bag-shaped spaces 1
Since it is in the form of a packet containing a, 1a, 1a, the regenerator does not partially concentrate, and the regenerator is evenly distributed over the entire area. Uniform cold air can be supplied.

In the case of the packaging sheet 1 as shown in FIG. 2, it is preferable to use the waterproof sheet 3 side in contact with the upper flap 5a.

The packaging sheet 1 can also be used in the transport case 5 as shown in FIG. 4, and the upper flaps 5a, 5a of the transport case 5 can be used.
It is possible to use one by fixing each one to the back side of each of the sheets, and also to fix the packaging sheet 1 to each of the bottom flaps 5b side. In such a use state, it is possible to more strongly maintain freshness. it can. In this case, the packaging sheet 1 fixed to the side of the bottom flap 5b may be pre-cooled by containing water, but it may be fixed and used without containing water and pre-cooling. That is, when used in a state where no water is contained at all, even if dew condensation water or the like is generated in the transportation case 5 during transportation, the dew condensation water or the like is absorbed by the water-absorbent resin in the packaging sheet 1 and the transportation case 5 It becomes possible to satisfactorily transport the product without water soaking in, and the packaging sheet 1 on the bottom flap 5b side mainly functions for absorbing moisture.

Although the packaging sheet 1 is shown in the form of a divided package in FIGS. 1 and 2, it may be formed by forming only one bag-shaped space 1a as shown in FIG. Well, in this case, too, if the fixed extending portions 1c, 1c are formed on both edge portions, respectively, it is possible to satisfactorily fix to the flap portion of the transport case 5 etc. via these extending portions 1c, 1c. Is.

Further, the packing sheet may be formed in a structure as shown in the enlarged sectional view of FIG. 6, and the packing sheet 11 in FIG. 6 has a bag-shaped space A, B on the front side and the back side, respectively.
Is formed at the same time, the partition sheet material 14 is disposed in the central portion, the partition sheet material 14 can be formed in a triple structure, for example, a high melting point linear chain in the central portion. Low density polyethylene layer 14a is formed, low melting point linear polyethylene 14b, 14b is disposed on the front and back sides thereof, the partition sheet material 14 is a low melting point linear polyethylene other than the sandwich structure. It is also possible to form a single sheet at.

A non-woven fabric 12 is provided on one surface of the packaging sheet 11, and an air-permeable plastic film 13 is provided on the other side. As the non-woven fabric 12, for example, a polyester-nylon-spun pond non-woven fabric or an olefin spun pond non-woven fabric is used, which has good water permeability. On the other hand, as the air-permeable plastic film 13, low density polyethylene, vinyl chloride, polycarbonate, polypropylene, nylon, hydrochloric acid rubber, and vinylon are used, which form pores that are impermeable to water but permeable to air. Can be set.

The partition sheet material 14, the non-woven fabric 12 and the air-permeable plastic film 13 are heat-welded at a predetermined interval to form a groove portion 11a, and the bag-shaped space portions A and B are formed on the front and back sides in a divided package. . For example, the water-absorbent polymer 2 can be enclosed in the bag-shaped space A, and the bag-shaped space B on the other side.
An oxygen scavenger (iron powder) 16 can be enclosed in the.

The wrapping sheet 11 formed in this way can be used by arranging it in the form of a bridge on the upper part of the flower transport case 5 as shown in FIG. 7, for example. The projecting portion 11c can be used by being attached to the inside of the upper flaps 5a, 5a of the transportation case 5 or the inside of the transportation case 5 main body by means of double-sided tape, heat welding, or high-frequency sealing. If provided, for example, if the bag-shaped space A is on the lower surface side and the bag-shaped space B is located on the upper surface side, the water-absorbing polymer 2 in the bag-shaped space A is hydrated and pre-cooled. In the above, cold air is emitted from the water-absorbent polymer 2 into the transportation case 5 during transportation, and a good cold state can be obtained, and the bag-shaped space B on the upper surface side.
By the action of the oxygen absorber (iron powder) 16 enclosed inside,
Oxygen in the transport case 5 can be favorably adsorbed in the bag-shaped space B, and a better freshness-retaining state can be obtained.

It is to be noted that FIG. 8 shows a schematic perspective view of an apparatus for molding the packaging sheet 1 shown in FIGS. 1 and 2.

That is, the apparatus has drums 20 and 20 around which the water-permeable sheets S ₁ and S ₂ are wound, respectively, and the sheets S from the drums 20 are respectively wound.
_{In the} process of pulling out ₁ and S ₂ separately, both sheets S ₁ and S ₂ are passed between a pair of heating rollers 21 and 22, and the pair of heating rollers 21 and 22 are kept in a heated state. ₁ , S ₂
Are heat-welded and integrated. A large number of concave portions 22a are formed in a concave shape on the peripheral surface of the heating roller on both sides or one side, and the portion of this concave portion 22a is not heat-welded, and the bag-shaped space portion 1a is formed at this portion. It is formed into a packet. The integrated sheets S ₁ and S
₂ is cut to an appropriate length through the cutters 23, 23 to complete the packaging sheet 1. When the heat rollers 21 and 22 are used as heat sheets, the water absorbent resin 2 is dropped from above the pair of heating rollers 21 and 22 through a hopper or the like, so that the water absorbent resin 2 can be satisfactorily bag-shaped. It is enclosed in the space 1a.

In this example, the width H ₁ of the water-permeable sheet S ₁ on one side is
Is formed to be shorter than the width length H ₂ of the water permeable sheet S ₂ on the other side, and the axial length of the heating rollers 21 and 22 is the width length.
It is set to a length equivalent to H ₁ . Therefore, the extending portion 1c formed of only the water-permeable sheet S ₂ on one side is provided at both edges of the packaging sheet 1 completed when heat-welded and integrated.
Are continuously formed.

Further, FIG. 9 shows an apparatus for shaping the packaging sheet 11 shown in FIG.

In the apparatus shown in FIG. 9, a drum 25 around which the partition sheet material 14 is wound is arranged in the upper part, and a pair of hoppers 28, 29 are arranged below the drum 25. Measuring devices 30 and 31 are provided below the 29, respectively. For example, the water-absorbent polymer 2 or the like can be placed in the hopper 28, and a life prolonging agent, activated carbon or the like can be placed in the hopper 29. Each of the scales 30 and 31 is formed into a plurality of boxes, and in order to obtain the packaging sheet 11 in the form of packets, an appropriate amount of each of the boxes is placed in a state in which a water-absorbing polymer or the like is dispersed. Become. A drum 26 around which the non-woven fabric 12 is wound and a drum 27 around which the air-permeable plastic film 13 is wound are arranged opposite to each other below the pair of weighing devices 30 and 31.
2 and the air-permeable plastic film 13 are supplied and combined with the partition sheet material 14 from the drum 25. The pair of heat rollers 32, 32 is for heat-sealing the sheets 12, 13, 14 at predetermined intervals in the pull-out direction, is heated, and the pair of heat rollers 32, 32 are brought into contact with each other. The groove 11a is formed by heat welding. At this time, as described above, the water-absorbent polymer or the like is dropped through the measuring devices 30 and 31 and enclosed in the sheet. A pair of heat rollers 33, 33 is disposed below, and the heat rollers 33, 33 are provided in the longitudinal groove portion 1 of the packaging sheet 11.
1a is for forming the concave portion 33a and the convex portion 33b at a predetermined interval in the lateral direction, when the convex portions 33b of the pair of heat rollers 33, 33 are continuously rotated in an abutting manner. The longitudinally heat-welded groove 11a is continuously formed on the packaging sheet 11. In this way a pair of heat rollers 32, 32
And further, the heat roller 33, 33 below it forms the packaging sheet 11 in the form of a packet continuously, and the cutter 3 below
The packaging sheet 11 is completed by cutting at 4, 34 at predetermined intervals.

(Effects of the Invention) The present invention is a cool storage sheet arranged in a transportation case capable of being packed with fresh flowers and the like, wherein the cool storage sheet includes a breathable nonwoven fabric on the front side and a partition sheet in the central portion. The material and an air-permeable plastic film having pores that allow water to pass through but not allow air to pass through on the back side are heat-welded at predetermined intervals to form a bag-like space portion in the front and back sides, respectively. In the bag-shaped space on the front side, a water-absorbing polymer capable of containing water and precooled is sealed, and in the bag-shaped space on the back side, an oxygen absorber (iron powder) is sealed.
When fresh flowers are packed in a transport case and transported, the water-absorbent polymer in the bag-shaped space on the front side is pre-cooled with water, and cool air is emitted from the water-absorbent polymer into the transport case during transportation. In addition to being able to maintain a cool state, the oxygen in the transport case is favorably adsorbed in the bag-shaped space due to the action of the oxygen scavenger (iron powder) enclosed in the bag-shaped space on the back side, which is even better. It has the effect of maintaining a good freshness.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention, FIG. 1 is a perspective configuration view of a packaging sheet, FIG. 2 is an enlarged cross-sectional view taken along the line AA of FIG. 1, and FIG. 3 shows the packaging sheet of FIG. FIG. 4 is a perspective view showing a state of being attached to a transportation case for transportation, FIG. 4 is a perspective view of being attached to another transportation case, FIG. 5 is a perspective view showing a modified example of the packaging sheet, and FIG. 6 is a packaging sheet. FIG. 7 is an enlarged view of a cross-sectional main part showing a different structure of FIG. 6, FIG. 7 is a perspective configuration diagram when the packaging sheet of FIG. 6 is used in a transport case, and FIG. 8 is the packaging sheet shown in FIGS. 1 and 2. FIG. 9 is a schematic configuration diagram of an apparatus for modeling, and FIG. 9 is a perspective configuration diagram of the apparatus for modeling the packaging sheet shown in FIG. 1 ... Packaging sheet 1a, A, B ... Bag-shaped space 1b, 11a ... Groove, 1c ... Extended portion 2 ... Water-absorbing polymer, 3 ... Waterproof sheet 4 ... Staple, 5 ... Flower Transport case 5a …… Top flap, 5b …… Bottom flap 12 …… Nonwoven fabric, 13 …… Breakable plastic 14 …… Partition sheet material 16 …… Deoxidizer (iron powder) 20,25,26,27 …… Drum 21,22 …… Heating roller 23,34 …… Cutter 28,29 …… Hopper 30,31 …… Measuring device 32,33 …… Heat roller S ₁ , S ₂ …… Water permeable sheet

Claims (1)

[Claims] 1. A cold storage sheet arranged in a transportation case capable of being packed with fresh flowers, the cold storage sheet comprising:
A non-woven fabric having air permeability on the front side, a partition sheet material in the central portion, and an air permeable plastic film having water-permeable but air-permeable pores on the back side, which are heat-welded at predetermined intervals to the front and back sides, respectively. A bag-shaped space is formed in the form of a packet, a water-absorbing polymer that can be hydrated and pre-cooled is enclosed in the bag-shaped space on the front side, and an oxygen absorber (iron powder) is contained in the bag-shaped space on the back side. ) Is enclosed, a cool storage sheet for transportation of fresh flowers and the like.