JP2841265B2 - Freshness preserving material and method for producing the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a freshness maintaining material for keeping freshness of fresh foodstuffs such as seafood, fruits and vegetables, and fresh flowers such as fresh flowers for a long time. In particular, the present invention relates to a granular freshness preserving material for fresh food and fresh flowers using waste materials. Further, the present invention also provides a paper dust of a waste generated in a paper manufacturing process and a paper product manufacturing process such as a diaper, a coffee extract liquid extraction residue of a waste generated in a process of producing a coffee beverage, that is, a coffee cake and a waste of a waste generated in a sawmilling process. The present invention relates to the effective use of wood flour and wood chips, that is, Hiba wood chips as a freshness preserving material.

[0002]

2. Description of the Related Art Articles that are easily damaged during transportation, such as fresh foods and fresh flowers, are transported in a packaging container. In this case, the freshness of the fruits and vegetables is controlled so as not to be damaged by the impact during transportation. In order not to lose, the freshness holding material is put between the packaging container and the article and between the articles, or is transported around the article by the freshness holding material. Examples of such a freshness retaining material include a film in which activated carbon impregnated with a bromine agent or an iodine agent having the ability to remove ethylene generated from fruits and vegetables or a gas-decomposing substance such as titanium oxide, aluminum oxide, and nickel oxide are used. A plastic sheet, paper, film, etc., in which the above is dispersed are used.

[0003]

However, such freshness preserving materials for fresh foods such as fruits and vegetables are in the form of sheets and films, require a relatively long time to use, and are expensive. , Has been a problem. Moreover, plastic sheets, such as polyethylene sheets, are used only for incineration or landfill after use, and are problematic in terms of environmental destruction. In addition, the use of plastic sheets such as polyethylene sheets means that petroleum-poor fossil fuels must be used for the only transportation of perishable food products and discarded, and in terms of effective use of petroleum resources. It is a problem.

[0004] On the other hand, the extraction residue at the time of extracting coffee extract from roasted coffee beans, that is, the coffee extract extraction residue, has increased in an enormous amount as the demand for coffee beverages such as canned coffee and instant coffee has increased. In addition, the coffee extraction liquid extraction residue contains a large amount of fat,
Because of the high cost of the treatment, the effective use of the coffee extract residue is one of the biggest challenges of the coffee beverage industry. In addition, paper dust is generated in large quantities in the process of cutting paper by the paper making slitter and in the diaper manufacturing process, etc., but it is difficult to handle, it is hardly used, and it is incinerated at high cost as it is. Has been a problem.

[0005] In addition, a large amount of wood chips such as wood powder of Hiba wood is generated in the process of Hiba sawmilling. Hiba oil has insect repellent and antiseptic functions and is hard to rot. It has been incinerated at a cost, and is considered a problem. SUMMARY OF THE INVENTION It is an object of the present invention to solve the problems of disposal of coffee extract residue, paper dust, and wood chips of hiba wood, and the problems of conventional freshness retaining materials.

[0006]

SUMMARY OF THE INVENTION The present invention provides waste paper powder,
It is an object of the present invention to provide a freshness-maintaining material that effectively utilizes a coffee extract liquid extraction residue, that is, coffee extract cake and hiba wood chips, as raw materials for the freshness-maintaining material.

[0007] That is, the gist of the present invention is to provide paper flour, coffee extract extract residue, and a smaller amount of wood flour and solid lubricant than any of the paper dust and coffee extract extract residue. A freshness-maintaining material mainly containing paper dust and a coffee extract liquid extraction residue, characterized in that it is formed into a granulated product having a water content of 10% or less and a particle size of 3 mm or more. , Paper powder, coffee extract extraction residue, and a smaller amount of wood flour and solid lubricant than both the paper powder and coffee extract extraction residue. A freshness-maintaining material mainly containing paper dust and coffee extract liquid extraction residue, characterized in that it is at least partially coated with hiba wood flour and formed into granules having a particle size of 3 mm or more. And even paper powder The extract of coffee extract, and the wood flour of hiba wood, the solid lubricant and water in a smaller amount than any of the paper powder and the extract of coffee extract were mixed, and the resulting aqueous mixture was extruded and granulated. Vibration is applied to the granules on the mesh to loosen the granules that adhere to each other, round the corners of the granules, and at least partially cover the surface of the rounded granules with wood powder of hiba wood. Forming a granulated product having a particle size of 3 mm or more, and drying it to a water content of 10% or less. .

[0008] The waste paper powder, the coffee extract liquid extraction residue and the wood powder of Hiba wood are mixed with each other. The total amount of coffee extract residue and paper powder of roasted coffee beans is 70% of buffer material.
% Or more, and among them, the amount of paper powder is preferably 40% by weight or more of the granulated material in order to reduce the coffee odor and the feeling of fat in the coffee extract liquid extraction residue. In the present invention, the paper powder and the coffee extract liquid extraction residue that are mainly used both have adsorptivity, and among them, the paper powder is
Furthermore, since it has absorptivity, it absorbs moisture around the freshness holding material and adsorbs harmful gas having polarity by the paper powder and coffee extraction liquid extraction residue, so that the surroundings of the freshness keeping article are kept. The environment can be prepared. In the present invention, wood chips such as wood powder of waste Hiba wood generated in a sawmill of Hiba wood has a bactericidal action and a function of maintaining freshness,
In the present invention, wood powder of hiba wood and wood powder of hiba wood obtained by pulverizing wood chips of hiba wood are 25% by weight or less of the freshness retaining material,
Preferably, 10 to 20% by weight of the freshness retaining material is blended.

[0009] In the present invention, in order to increase the adsorptivity of the freshness-maintaining material, tea husks, that is, tea husks, produced in a beverage tea manufacturing plant can be blended. In this case, the amount of tea husk used as the compounding material is one of the freshness preserving materials.
The content is preferably 0% by weight or less. Paper flour, wood flour and / or tea husk are preferably used instead of the roasted coffee bean extract extract residue, because they alleviate the coffee smell of the coffee extract extract residue and the feel of fat on the surface.

[0010] The water content of the freshness retaining material of the present invention is 10%.
By drying as described below, the occurrence of mold during storage can be prevented. During the production of the freshness preserving material of the present invention, the water retention function of the mixed granules of paper powder, coffee extract extraction residue and Hiba wood powder is enhanced, and at the same time, paper powder, coffee extract extraction residue and Hiba wood powder are improved. In order to function as a lubricant during granulation of the above mixture, a powdery superabsorbent resin can be blended with a mixture of paper powder, coffee extract liquid extraction residue, and Hiba wood flour.

In the present invention, when a superabsorbent resin is used as a compounding substance in the freshness retaining material, the superabsorbent resin absorbs water from around the freshness retaining material, swells and increases its volume, This is preferable because it acts to close the gap between the holding members and retain water. The superabsorbent resin blended in the present invention absorbs water of several tens to about 200 times its own weight,
A resin capable of maintaining its shape, for example, a saponified copolymer of a vinyl ester and an ethylenically unsaturated carboxylic acid or a derivative thereof, a graft polymer of starch and acrylic acid, a crosslinked product of polyacrylic acid, vinyl alcohol and acrylic Acid copolymers, partially hydrolyzed polyacrylonitrile, cross-linked carboxymethyl cellulose, cross-linked polyethylene glycol, chitosan salts or gels of pullulan, etc., alone or as a mixture of two or more of these Used as a compounding substance.

In the present invention, the superabsorbent resin is sufficient if it can function as a lubricant when granulating a mixture of paper powder and a coffee extract extraction residue with a granulator, and has a water absorption capacity of 200 g / g. If it is less, the resin having poor water absorption performance, and a defective resin can be used as the superabsorbent resin. Defective products of such polyacrylic acid resin with low water absorption performance,
It has a fine particle size of 10 μm or less, and can be obtained, for example, by classification from waste diapers, or can be obtained as a non-standard product of polyacrylic acid resin.

In the freshness preserving material of the present invention, the granulated product containing the paper powder, the coffee extract liquid extraction residue and the wood powder of Hiba wood is kept in a dry state, for example, having a water content of 10% or less during storage. In order to prevent generation of dust and the like during storage, it is preferable to separate, for example, a fine powdery portion having a particle diameter smaller than 3 mm.

In the present invention, the compounding substance to be mixed with the freshness preserving material can be easily formed into a mass by adhering particles of paper powder, extraction residue of coffee extract and wood powder of hiba wood to each other. In addition, the material is preferably a material having an adhesive function so that the freshness retaining material is not easily powdered during use. As such a compounding substance, as a water-soluble or water-dispersible compounding substance, tea husk, papermaking pulp, papermaking sludge, pulp waste containing activated carbon, pulp sludge, gelatin, vinyl ester, zeolite and the like can be used. From the point of view, it is preferable to use waste materials. These may be used alone or as a mixture of two or more of these. Examples of the alcohol-soluble compounding substance include hydroxyethyl cellulose (HEC), hydroxypropyl cellulose (HPC), polyvinylpyrrolidone or (PVP) and the like. Two or more kinds are mixed and used as a compounding substance.

[0015] The amount of the compounding substance incorporated in the freshness retaining material of the present invention can be 20% by weight or less, preferably 10% by weight or less of the freshness retaining material. In this case, the compounding substance may be added alone or in combination of two or more to a mixture or granulated product of paper powder, coffee extract extraction residue and a material having a drying action, or may be added to paper powder, coffee extract extraction. Before or during mixing of the residue and the material having a drying action,
Alternatively, the mixture of paper powder, coffee extract extraction residue, and a material having a drying action may be mixed at the time of granulation and combined into granulated particles.

Further, in the present invention, the dried granulated product of the coffee extract liquid extraction residue itself has an adsorption ability, but in order to minimize the transfer of the odor of one transport article to another transport article. In addition, the freshness preserving material of the present invention has an adsorbing ability in an amount of 10% by weight or less as an auxiliary deodorant, and has an adsorbing ability for, for example, pulp waste containing activated carbon such as charcoal filter waste for black tobacco. Compounding substances can be compounded. These are preferably blended into the granules.

In the present invention, the mixture of paper powder, coffee extract liquid extraction residue and wood powder of hiba wood is mixed by a granulator.
Granulated into various shapes such as spherical, columnar, granular, and granular. As the granulation device, a conventionally known extrusion granulation device can be used. However, besides this, various types of granulators of pan type, drum type and fluidized bed type can be used.
In these granulators, when a coating material composed of wood flour of hiba or a mixture of the wood flour and paper powder is adhered to the surface of the granulated material or to the surface of the granulated material obtained by the granulating device. The generation of mold on the surface of the granulated material can be avoided for a long period of time. In this case, the surface of the granulated material is dusted with wood powder of hiba wood and a mixture of the wood powder and paper powder to be adhered to the surface of the granulated material, or the surface of the granulated material is wetted or suspended. Instead of a suspension, it can be attached by spraying or the like. When a mixture of wood flour and paper flour is used for coating granules, the amount of wood flour in the mixture is preferably 50% or more, preferably 60 to 75%. It is preferable to use wood flour and paper flour having a particle size of 0.5 mm or less. In the present invention, as described above, when the coating material is applied to the surface of the granulated material, it is preferable that the applied coating material is not easily peeled off by subsequent drying.

[0018]

In the present invention, the freshness retaining material contains a coffee extract liquid extraction residue having excellent adsorptivity, and further contains paper powder excellent in water absorption and wood powder of hiba wood excellent in freshness retaining function, and is 3 mm or more. It has a deodorizing function, a freshness maintaining function, and a water retaining function, and can be easily crushed. Placed between each other or between the packaging of the transport article to remove ethylene from fresh food or flowers, creating a good environmental atmosphere around the transport article and cushioning against impact It works. Further, in the present invention, the surface of the above-mentioned granulated material is coated with wood flour of hiba wood, so that the freshness maintaining function and the antifungal function can be enhanced.

Further, the present invention uses fresh combustible waste such as paper powder, coffee extract residue and wood powder of hiba wood, which have conventionally been produced in large quantities and whose treatment has been a problem. In addition, tea husks and pulp containing activated carbon to be added are also combustible wastes, and their adsorptive capacity is used as a freshness-keeping material. As described above, the freshness retaining material of the present invention is entirely composed of combustible materials, and is easily disposed of.

In the present invention, when a compounding material having an adhesive function is compounded, it is less likely to break during use. Further, when the auxiliary adsorbent is mixed in the freshness retaining material, it exhibits more excellent adsorptivity, removes the ethylene of the mature hormone, and creates a better freshness retaining atmosphere around the transportation goods. Can be kept. Moreover, since the wood flour of the hiba wood has a bactericidal action, the freshness retaining material of the present invention can be used and stored for a long period of time without generation of mold and the like.

[0021]

EXAMPLES Examples of the embodiments of the present invention will be described below, but the present invention is not limited by the following description and illustrations. FIG. 1 is a schematic plan view showing a process of manufacturing a freshness retaining material according to one embodiment of the present invention. FIG.
FIG. 4 is a schematic plan view showing a step of manufacturing a freshness retaining material according to another embodiment of the present invention.

In FIG. 1, a hopper 1 for extracting coffee extract liquid is located on a conveying path of the belt conveyor 2, and is provided so that the coffee extract liquid extract residue can be supplied to the belt conveyor 2. In addition, the hopper 3 for measuring the weight of the wood of the hiba is located on the conveying path of the belt conveyor 4 so as to be able to supply the wood of the hiba to the belt conveyor 4. In this example, the conveyor outlets 5 and 6 of the belt conveyor 2 for supplying the coffee extract liquid extraction residue and the belt conveyor 4 for supplying the wood flour of the hiba wood are located on the belt conveyor 7 for supplying the compound at the positions facing each other. It is provided in. The belt conveyor 7 for supplying the compound includes:
The material to be mixed is supplied to the mixing device 8.

A high-grade water-based resin is charged from a super-absorbent resin weighing hopper 9 to the upper portion of the belt conveyor 7 for feeding the mixture, at the downstream side from the supply position of the coffee extract liquid extraction residue and the wood powder of the hiba wood. A belt conveyor 10 for supplying highly water-absorbent resin is provided for supplying the belt conveyor 7 for supply. Therefore, in this example, the mixture of the coffee extract liquid extraction residue, the wood flour of the hiba wood, and the superabsorbent resin is supplied to the mixing device 8 by the belt conveyor 7 for conveying the mixture.

In the present embodiment, the mixing device 8 is provided with an inlet for the raw materials to be mixed of the mixing device 8 from below the paper powder measuring hopper 11 so that the paper dust is supplied from the paper powder measuring hopper 11 to the mixing device 8. Extending above (not shown) is a belt conveyor 12 for feeding paper dust. Mixing device 8
In the above, paper powder, coffee extract liquid extraction residue, wood powder of hiba wood, and superabsorbent resin are uniformly mixed. The mixture thus mixed leaves the mixture outlet 13 of the mixing device 8.

A belt conveyor 14 for conveying the mixture is provided at the mixture outlet 13 of the mixing device 8 for conveying the mixture exiting from the mixing device 8. The mixture mixed in 8 is conveyed to the supply hopper 16 of the extrusion granulator 15. The mixture is introduced into the extrusion granulator 15 and is extruded from the die 17 side as a columnar granule. Below the die 17 of the granulating device 15, there is provided a belt conveyor 19 for conveying the granulated material for sending the extruded granulated material to the circular sieve 18. In this example, the opening of the circular sieve 18 is 3 mm, and the on-sieve particles exit from the on-sieve outlet 20 and are supplied to a belt conveyor 21 for conveying on-sieve particles connected to the on-sieve outlet 20. .

The on-screen particle conveyor belt conveyor 21 is connected to a hopper 23 of a vibrating granulator 22. The vibration type granulator 22 is provided to loosen the granules adhering to each other by vibration to minimize powdering during use. The particles on the sieve are conveyed by the conveyor belt conveyor 21.
It is supplied to the hopper 23 of the vibration type granulator 22. on the other hand,
The undersize particles of the circular sieve 16 are returned to the belt conveyor 14 for transporting the mixture to the granulating device 15 by a belt conveyor 25 for transporting the undersize particles provided at the undersize outlet 24.

The granulated product sent to the vibratory granulator 22 is loosened by the vibration of the vibratory granulator 22 and sent out. In this example, on the outlet side of the vibration type granulator 22,
A sieve 26 having an opening of 3 mm is provided, and below the sieve outlet of the sieve 26, there is provided a belt conveyor 27 for conveying the mixture connected to the belt conveyor 14 for conveying the mixture. The lower particles are returned to the belt conveyor 14 for conveying the mixture to the granulator. In the vibration type granulator 22, particles having a particle diameter of 3 mm or more are carried out from a belt conveyor 29 for conveying on the sieve connected to the outlet 28 on the sieve.

The granulated product from the vibration type granulator 22 is introduced into the dryer 30 from the hopper 31 of the dryer 30 and dried. The dried granulated material is sent to the product tank 24 by a belt conveyor 33 for conveying the dried granulated material provided at the dried material outlet 32. The product sent to the product tank 34 is taken out to the bagging area 35, packed in a bag, and shipped. In this example, the surface of the granulated material was not coated with wood powder of hiba wood or a mixture of wood powder of hiba wood and paper powder, but in the apparatus shown in FIG. When coating with wood flour or the like, the coating is performed in the vibration type granulator 22.

Since the apparatus of this embodiment is configured as described above, a predetermined amount of coffee extract extraction residue is put into the weighing hopper 1 and a predetermined amount of wood flour is supplied to the weighing hopper 3.
, And a predetermined amount of high-grade aqueous resin is put into the measuring hopper 9, and a predetermined amount of paper powder is put into the measuring hopper 11. Therefore, a belt conveyor 2 for supplying coffee extraction liquid extraction residue, a belt conveyor 4 for supplying wood powder of hiba wood, a belt conveyor 10 for supplying high-grade aqueous resin, a belt conveyor 7 for supplying the compound, and a belt for supplying paper powder. The conveyor 12 is operated to supply a predetermined amount of paper dust, coffee extraction liquid extraction residue, wood flour of hiba wood, and high-grade aqueous resin to the mixing device 8 respectively. When these predetermined amounts of paper dust, coffee extract extraction residue, wood powder of hiba wood, and high-grade aqueous resin are supplied, the mixing device 8 is operated to operate the paper powder, coffee extract extraction residue, wood powder of hiba wood. , To produce a mixture in which the higher aqueous resin is uniformly mixed. The mixed mixture is conveyed from a mixture outlet 13 by a belt conveyor 14 for conveying the mixture, and supplied to a supply hopper 16 of a granulating device 15.

In this embodiment, the granulator 15 is an extrusion granulator, which is pushed by the rotation of the screw, has a cross section corresponding to the hole of the die 17, and has a length corresponding to the thickness of the die 17. Particles are obtained. In this example, the water is brought in from the coffee extraction liquid extraction residue, but when the water is insufficient, water is added in the supply hopper 16 to a predetermined water content. If the water content is high, paper powder or wood powder of hiba wood is added in the supply hopper 16 for adjustment.

The granulated material extruded from the die 17 of the granulator 15 is sent to a circular sieve 18 by a belt conveyor 19 for conveying the granulated material, sieved, and 3 mm below the sieve.
The granules having the following particle diameters are returned to the belt conveyor 14 for conveying the mixture by the belt conveyor 25 for conveying the undersize particles. The on-screen particles having a particle size of 3 mm or more are oscillated by a vibration type granulator 22 by a belt conveyor 21 for conveying the on-screen particles.
The particles having a size of 3 mm or more are sent to a dryer 30 by a belt conveyor 29 for conveying on a sieve.
Dried.

The particles having a size of 3 mm or less in the vibration type granulator 22 are
The mixture is returned from the under-sieving outlet to the belt conveyor 14 for conveying the mixture through the conveyor belt 27 for conveying under the sieve, and is subjected to the granulation process again. Drying is performed while maintaining the temperature of the dryer at 100 ° C. or higher. The dried granules are sent to a product tank 34 by a belt conveyor 33 for conveying the dried granules. It is considered a product for shipment.

The embodiment shown in FIG. 2 shows an example in which the surface of the granulated material is covered with wood flour of hiba wood to obtain a freshness retaining material. The vibration type granulator of the embodiment shown in FIG. It is formed in substantially the same manner as the embodiment of FIG. 1 except that a step of coating wood of hiba wood is added to the surface of the sieved particles of the sized granules. Therefore, in the embodiment of FIG. 2, the steps other than the steps from the vibration type granulator 22 to the dryer 30 operate in the same manner as the corresponding steps of the embodiment of FIG. The same reference numerals are given to the portions that are performed. Therefore, the steps from the vibration type granulator 22 to the dryer 30 will be described with reference to FIG.

Also in this example, a sieve 26 having an opening of 3 mm is provided on the outlet side of the vibrating granule sizing machine 22, and a belt conveyor 1 for conveying the mixture is provided below the lower sieve outlet of the sieve 26.
4 is provided with a belt conveyor 27 for conveying under the sieve. The undersize particles having a particle diameter of 3 mm or less from the vibrating granulator 22 are returned to the belt conveyor 14 for conveying the mixture to the granulating device in order to be subjected to granulation again. In the vibration type granulator 22, particles having a particle diameter of 3 mm or more are taken out from a belt conveyor 29 for on-sieve transport connected to an on-sieve outlet 28 in order to cover the surface of the wood powder of hiba wood. The granulated material is supplied to the hopper 37 of the granule coating device 36 connected to the upper conveyor belt conveyor 29.

The granulated material coating device used in the present embodiment is a vibration type coating device. In this example, two granulated material coating devices 36 and 38 are provided in series and provided. The outlet 39 of the first granulation coating device 36 is located above the second granulation coating device. Each of the granule coating devices has a sprinkling tube 40 and 4 which is opened on a vibrating conveyance path.
1 are provided, and from the respective spray tubes 40 and 41,
Hiba wood flour is sprayed on the vibrating granules to cover the granules. Hiba wood flour distribution tubes 40 and 41 extend from the Hiba wood flour supply tank 42 onto the first and second granule coating devices 36 and 38, respectively.

A pipe 44 from a wood flour storage tank 43 is connected to the wood flour supply tank 42 of the wood flour.
It is formed such that wood powder of hiba wood can always be supplied to the granulated material at a constant ratio. The second granulated material coating apparatus 38 is provided with a coated granulated material conveying belt conveyor 45 connected thereto, and the coated granulated material is conveyed by the coated granulated material conveying belt conveyor 45. The coated granulated material is transferred to the hopper 31 of the dryer 30 to which the belt conveyor 45 is connected.

The coated granules are introduced into the drier 30 from a drier 30, for example, a hopper 31 of a hot air drier.
As in the case of the embodiment shown in FIG.
2 is transferred to the product tank 24 by the belt conveyor 33 for conveying the dried granules provided in
Taken out and packed in a bag for shipment.

In this example, wood particles of Hiba wood having a particle size of 0.1 mm to 0.5 mm are sprayed on the granulated material in an amount of 7 to 3% by weight, preferably about 5% by weight based on the granulated material. Can be coated. In this case, instead of Hiba wood flour,
For example, a mixture of paper powder of 0.1 mm to 0.5 mm and wood powder of hiba wood may be coated by spraying. The amount of the hiba wood in this mixture is made larger than the amount of the paper powder in the mixture. For example, the amount of the hiba wood in the mixture is preferably 50 to 70% by weight. When the coating material is not sufficiently adhered to the surface of the granulated material, a diluted solution of polyvinyl alcohol, for example, a diluted solution of polyvinyl alcohol having a concentration of 1% or less, preferably about 0.6%, is applied to the surface of the granulated material. Can be sprayed. In the present example, the surface of the granulated material is coated by the first and second granulated material coating apparatuses. However, in the apparatus shown in FIG. In the first granulation material coating device 36, the second granulation material coating process is performed in the first granulation material coating device 36.
In the granulated material coating apparatus 38, a third coating step of the granulated material may be performed.

Example 1 An extraction residue obtained by adding water to roasted ground coffee beans to extract coffee, that is, a water content of 78 containing 4,000 g of a residue extracted from a dried coffee extract.
% Of coffee extract extract residue into the coffee extract extract residue measuring tank 1,
0 g was placed in the wood flour measuring tank 3, 500 g of the recycled polymer of high-grade water-based resin was placed in the measuring hopper 9, and 4,700 g of paper powder from diaper waste was placed in the measuring hopper 11.

When these raw materials were put into the respective weighing hoppers, the belt conveyors 2, 6, 7 and 1 for each supply were supplied.
2 was operated to first supply the hydrated coffee extract extraction residue and the wood flour of the hiba wood to the belt conveyor 7 for supplying the compound, and the regenerated polymer was added thereto. The mixture containing the coffee extraction liquid extraction residue, the wood flour of the hiba wood and the regenerated polymer is supplied to the mixing device 8. Meanwhile, at the same time, the paper dust was supplied to the mixing device 8.

The mixture of the paper powder, the coffee extract extraction residue, the wood powder of hiba wood and the superabsorbent resin mixed in the mixing device 8 is extruded from the mixing device 8 through a belt conveyor 14 for conveying the mixture. It is sent to the granulator 15 and granulated. The granulated material extruded from the granulator 15 has a diameter of 6.
A relatively thin columnar granule of 4 mm and a length of 12.5 mm was obtained. The granulated material is sent from the belt conveyor 19 for conveying the granulated material to the circular sieve 18 and sieved. The particles on the sieve are sent to a vibration type granulator 22 by a belt conveyor 21 for conveying the particles on the sieve.

In the granulator, the granules adhering to each other were subjected to a granulating action such as loosening and shaping into a rounded shape, and then sent to the dryer 30 to be dried. The obtained product has excellent adsorption performance, and is used for fresh food and fresh flowers such as fruits such as melon,
After one week, there is no change in freshness, and the freshness holding performance is excellent. The freshness preserving material of this example may be used in direct contact with fresh food, or may be used in a bag. In addition, since the freshness retaining material of this example uses hiba wood, repelling of insects such as cockroaches is remarkable, and no mold is generated for a long period of time.

Example 2 An extraction residue obtained by adding water to the ground coffee beans and extracting coffee, that is, a coffee extract extraction residue having a water content of 75% containing 2,700 g as a dry coffee extract extraction residue and dried tea husk 1,00
A measuring tank 1 containing 80 g of a tea hull containing 0 g and having a water content of 80%.
, Then, as wood flour, wood flour 1,000g
Into the wood powder measuring tank 3, 500 g of the recycled polymer of high-grade water-based resin into the measuring hopper 9, and 5,000 g of paper powder from diaper waste material into the paper powder measuring hopper 1.
1 and then processed in the same manner as in Example 1 to a diameter of 6.4.
mm, a relatively thin columnar granule having a length of 12.5 mm was obtained. The obtained product has excellent adsorption performance,
For example, when used for fresh foods such as fruits such as melon and the like has passed for one week, there is no change in freshness, and freshness retention performance is excellent.

[0044]

The freshness retaining material according to the present invention contains a coffee extract liquid extraction residue having excellent adsorption performance, contains hiba wood powder excellent in freshness retaining function, and further contains a superabsorbent resin. Since it is a granulated product having a particle size of 3 mm or more,
Compared with conventional freshness preserving materials, it is inexpensive, and is arranged between packaging materials such as fresh foods and fresh flowers to adjust the environmental atmosphere around the transporting products to provide good freshness. A holding environment can be formed, and the insect repellent action and fungicidal action can repel insects for a long period of time, prevent the generation of fungi, and exhibit a strong buffering action against impact.

Further, the surface of the above-mentioned granulated material is coated with wood powder of hiba wood, and the insect repellent action and the fungicidal action can be further strengthened.
The occurrence of mold can be prevented. The present invention effectively utilizes combustible waste such as paper powder, coffee extract extraction residue, and wood powder of hiba wood, which have conventionally been generated in large quantities and whose processing has been a problem, as a raw material for a freshness preserving material. Compared with the conventional freshness holding material, it exerts an excellent freshness holding effect irrespective of the use of wastes, and furthermore, both are composed of a main amount of combustible materials, so that disposal treatment is easy. is there.

[Brief description of the drawings]

FIG. 1 is a plan view schematically showing an example of a process for manufacturing a freshness retaining material according to an embodiment of the present invention.

FIG. 2 is a plan view schematically showing an example of a process of manufacturing a freshness holding material according to another embodiment of the present invention.

[Explanation of symbols]

1 Measuring hopper for coffee extract extraction residue 2 Belt conveyor for supplying coffee extract extraction residue 3 Measuring hopper for Hiba wood powder 4 Belt conveyor for supplying Hiba wood powder 5 For supplying coffee extract extraction residue Outlet of belt conveyor 6 Outlet of belt conveyor for supplying wood powder of hiba wood 7 Belt conveyor for supplying compound 8 Mixing device 9 Measuring hopper for superabsorbent resin 10 Belt conveyor for supplying superabsorbent resin 11 Paper powder weighing hopper 12 Belt conveyor for supplying paper powder 13 Mixer outlet of mixing device 14 Belt conveyor for transporting mixture 15 Extrusion granulation device 16 Supply hopper for extrusion granulation device 17 Dies of granulation device 18 Circular sieve 19 Granulation Belt conveyor for transporting objects 20 Outlet on sieve 21 Belt conveyor for transporting particles on sieve 22 Vibrating granulator 3 Hopper of Vibratory Granulator 24 Under-Sheet Outlet of Vibratory Granulator 25 Belt Conveyor for Conveying Undersize Particles of Vibratory Granulator 26 Sieve 27 Belt Conveyor for Conveyance of Under-Sieve 28 Vibratory Granulator Outlet on sieve of machine 29 Belt conveyor for carrying sieve on sieve 30 Dryer 31 Hopper for dryer 32 Dry material outlet 33 Belt conveyor for carrying dry granulated material 34 Product tank 35 Bagging area 36 First granulated material Coating device 37 Coating device hopper 38 Second granulated material coating device 39 Outlet of first granulated material coating device 40, 41 Spray tube 42 Hiba wood flour supply tank 43 Hiba wood flour storage tank 44 Hiba wood Pipeline from wood flour storage tank 45 Belt conveyor for conveying coated granules

Claims (3)

(57) [Claims] Claims 1. A paper powder, a residue of a coffee extract, and a lesser amount of wood flour of hiba wood and a solid lubricant than any of the residue of the paper extract and the extract of a coffee extract, and a water content of 10% or less. A freshness-maintaining material mainly containing paper powder and a coffee extract extraction residue, wherein the freshness-maintaining material is formed into a granulated product having a particle size of 3 mm or more. 2. A paper powder, a coffee extract extraction residue, and a lower amount of wood flour and solid lubricant than any of the paper powder and the coffee extract extraction residue, and a water content of 10% or less. Wherein the surface is at least partially covered with wood flour of hiba wood and formed into a granulated product having a particle size of 3 mm or more. Holding material. 3. A paper flour, a coffee extract extraction residue, and a mixture of wood flour, a solid lubricant, and water in a smaller amount than any of the paper dust and the coffee extract extraction residue. Extrusion granulation is performed, and the obtained granules are vibrated on a mesh to loosen the granules adhering to each other and round the corners of the granules. Characterized by being at least partially coated with wood flour, formed into granules having a particle size of 3 mm or more, and dried to a moisture content of 10% or less, mainly containing paper powder and coffee extract residue. A method for producing a freshness retaining material.