JP3513404B2 - Anti-condensing outdoor cover - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [0001] BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention
For outdoor cover with waterproof and light shielding ventilation
You. [0002] BACKGROUND ART Conventionally, agricultural products such as potatoes and onions are
When harvested, it is collected in a collection container, but is immediately processed
Without being packed in a collection container,
Often transported to factories or shipped to markets. So
During this time, the collection containers are left outdoors and stored
And water resistant to resist rain and shade
Often covered with a cover made of a conductive sheet. However
During storage, waterproof and light-shielding properties are sufficient,
Potency, onions, etc
The amount of moisture emanates, and the back of the cover
Condensation occurs on the surface, and the resulting water droplets again become potatoes and balls
It is said that the quality of agricultural products is significantly reduced by dripping on
There was a problem. [0003] SUMMARY OF THE INVENTION The present invention
As a solution to the problem, waterproof, light-shielding, and breathable
As well as absorbing moisture emanating from the object to be coated.
Anti-condensation outdoor cover that can prevent condensation
The purpose is to provide. [0004] The present invention has been made in consideration of the above circumstances.
It was doneCovering objects such as agricultural products,
Light-shielding and breathable sheet that constitutes the base material for outdoor covers
G, superimposed on the central portion of the light-shielding breathable sheet,
A waterproof sheet whose one side is joined to a light-shielding breathable sheet,
And placed between the waterproof sheet and the light-shielding breathable sheet.
Combined with water absorbent sheetAn outdoor cover,
As the water absorbing sheet, a water absorbing sheet containing a water absorbing resin is used.
And / or natural fibers having hydrophilic groups
Fiber absorbent sheetCan be used outdoors
Water resistant to rain and dew for stored objects
At the same time, absorbs water emanating from the object
As a result, there is no stuffiness due to temperature rise due to the ventilation effect.
Covering objects such as objects without stacking without deteriorating quality
can do. That is, the gist of the present invention is
Outdoor cover that covers the objects to be stacked such as
The cover isCovering objects to be stacked such as agricultural products,
Light-shielding air-permeable sheet constituting the base material of
It is superimposed on the central part of the temper sheet, and one side is blocked.
A waterproof sheet bonded to a light-permeable sheet and a waterproof sheet
Water-absorbent sheet placed between
And the water-absorbent sheet contains a water-absorbent resin.
Water-absorbent sheet and / or natural fiber having hydrophilic group
That it consists of a fiber absorbent sheet made of fiberCharacteristic
Dew condensation prevention outdoor cover. [0005] The water-absorbent sheet is 1 to 20 kg / m2.²
Water absorption performance,As a water-absorbent sheet,
Water-absorbent sheet containing aqueous resin, natural with hydrophilic group
Fiber absorbent sheet made of fiberIs preferred. [0006] BRIEF DESCRIPTION OF THE DRAWINGS FIG.
This will be described in detail with reference to an example. FIG. 1 shows the connection according to the present invention.
It is a perspective view which shows the outline of the dew prevention outdoor cover 1. FIG. Mark
No. 2 is a waterproof sheet, 3 is a water-absorbent sheet, 4 is light-shielding ventilation
7 is provided to bind the cover
It is a broken eyelet. FIG. 4 shows an example of an agricultural product which is an example of an object to be coated.
This shows the collection container 11, where (a) is a square collection
A state in which the potatoes 10 are stored in a container 11 and are arranged in a row.
(B) Potato 10 in circular collection container 11
It is an explanatory view showing a state in which is stored. These coating objects
The object forms a ceiling part 5 and a side part 6, and the ceiling part 5
It is necessary to be covered with the waterproof sheet 2,
At least a part of the sheet covering the light-shielding and breathable sheet 4
It is necessary to be. The dew condensation preventing outdoor cover 1 of this embodiment is
The potato 10 is stored in a square collection container 11 and
Shows the cover that covers the arrangement, waterproof sheet
2 is the ceiling 5 of the object when the object is covered with the cover.
A sheet with a square shape that roughly corresponds to the projected shape
And is arranged on the upper surface of the central part of the cover. This waterproof
The permeable sheet 2 is superimposed on the light-shielding breathable sheet 4,
One side of the waterproof sheet 2 is joined to the light-shielding breathable sheet 4
ing. Water-absorbent sheet 3 is waterproof, covering ceiling 5
It is arranged on the lower surface side of the sheet 2 and is
A sheet with a relatively small area, a waterproof sheet
2 and the light-shielding and breathable sheet 4
You. The light-shielding and air-permeable sheet 4 serves as a base material,
A temperable sheet is used. FIG. 5 shows the dew condensation preventing outdoor cover 1.
Shows a state of covering an object in which five collection containers 11 are arranged.
are doing. The ceiling part 5 is covered with the waterproof sheet 2 and
The side part 6 has a light-shielding breathable sheet 4 hanging down from the ceiling part 5.
Covers the target object. The waterproof sheet 2 on the ceiling 5
Eyelets 7 are provided at predetermined intervals on the three sides except the joint.
Through the eyelet 7 through the string 12 to the bottom of the collection container 11
And fix it on the underside of the waterproof sheet 2.
The placed water absorbent sheet 3 is prevented from falling off.
The eyelets 7 are also provided at predetermined intervals at the lower end of the light-shielding breathable sheet 4.
Is provided, and the waterproof sheet 2 is passed through the string 12.
In the same manner as described above. However, the dew condensation preventing property of the present invention for outdoor use
Does cover 1 cover objects to be piled up such as agricultural products?
However, it is not limited to the above shape,
A correspondingly shaped cover is used. Therefore, the cover
May be in the form of a single sheet and conforms to the shape of a rectangular parallelepiped
Even if it is formed in a box shape, it is included in the present invention.
It is what is done. The waterproof sheet 2 is provided on the ceiling of the object.
Even if it covers not only 5 but also a part of the side 6 around the four sides
No problem. Further, the light-shielding and breathable sheet 4 is provided for the object.
Is configured to cover at least a part of the side surface portion 6 of the
And preferably 50% or more of the total area of
Preferably occupies 75% or more. Shade ventilation
As shown in the present embodiment, the conductive sheet 4 covers the entire side portions 6 around the four sides.
May be covered, but three perimeter or two perimeter sides
The surface portions 6 may be covered, or light shielding ventilation of each side portion 6 may be performed.
So that the total of the conductive sheets 4 is at least 50% or more.
They may be provided at random. Light shielding and breathable sheet 4
If the proportion occupied is less than 50%, the air permeability becomes insufficient.
It is not preferable because it causes condensation. In this embodiment, the waterproof sheet 2 is shielded.
One side is joined on the light-permeable sheet 4 to form a waterproof screen.
Between the sheet 2 and the light-shielding and breathable sheet 4
It is designed to be inserted and used. Waterproof sheet 2
Lays eyelets 7 on three sides other than the joined side,
Container 7 for collecting waterproof sheet 2 through string 12 etc.
11 and the waterproof sheet 2 turns up
And the inserted water-absorbent sheet 3 is used.
Prevents falling inside. Also, light-shielding breathable sheet
The eyelet 7 is also provided around the point 4 and the string 12
To the collection container 11. Waterproof sheet
2 is a method other than joining one side to the light-shielding and breathable sheet 4
And two or three sides thereof are joined to the light-shielding and permeable sheet 4.
Into a bag, and insert the water-absorbent sheet 3 into the bag.
Or after placing the water-absorbent sheet 3
May be joined and fixed. Lightproof and breathable sheet 4 and waterproof
The method of joining the non-conductive sheet 2 includes sewing, welding, and bonding.
Any method such as bonding using an agent can be used. As the waterproof sheet 2, for example, Niro
Thermoplastics such as rubber, polyvinyl chloride and polyolefin
It may be a sheet obtained by extruding fat, or
Heats woven or knitted or non-woven fabrics made of synthetic or natural fibers.
The sheet which laminated | stacked the plastic resin film may be sufficient.
Among these, flats formed from polyolefins
Laundry with polyolefin on cloth obtained by weaving yarn
Polyolefin flat yarn obtained by mining
The loss laminate sheet is lightweight, strong, flexible and inexpensive
It is preferred in that respect. With polyolefin flat yarn cloth
As a result, polypropylene with high stretching effect or high density
500 to 20 by a known method using polyethylene.
Formation of 00 denier (hereinafter abbreviated as d) flat yarn
And woven in a plain weave at 10 to 20 threads / inch for both wefts
Woven fabrics are preferred. Then, on both sides of this woven fabric,
Of low-density polyethylene, etc.
Forming Refined Flat Yarn Cloth Laminated Sheet
I do. The obtained polyolefin flat yarn crsula
The basis weight of the minate sheet is 100 to 400 g / m ²But
preferable. The water absorbing sheet 3 contains a water absorbing resin 8.
Absorbent sheet 3 and / or fiber absorbent sheet
G. Water absorption containing water absorbent resin 8
The permeable sheet 3 has a water-absorbing tree between the two permeable sheet materials 9.
Fat and granules of fat 8
Is 50 to 300 times its own weight, preferably 150 to 200 times
What absorbs and retains the water of the above is preferably used. Sucking
If the water magnification is less than 50 times, it is difficult to achieve the object of the present application.
Over 300 times, the water-absorbent resin 8 swells and becomes water-permeable
The sheet material 9 may be damaged, or the water-absorbent resin 8 may fall off and be damaged.
It is not preferable to mix with the object to be covered. With the water-permeable sheet material 9
In addition, it has water permeability and holds the water absorbent resin 8 when wet.
What is necessary is just to have a wet strength capable of
Paper, non-woven fabric, porous plastic film, etc. are used
It is. The water absorbing resin 8 is made of a natural polymer.
Starch-based starch-acrylic acid graft polymerization
Body, starch-acrylonitrile graft polymer, cal
Cellulosics such as boxymethylated starch
Cimethylated cellulose, cellulose-acrylonitrile
Graft polymers and the like, and as a synthetic polymer system
Means acrylic cross-linked polyacrylate, polyacrylic
Polyvinyl alcohol such as saponified lonitrile polymer
Is based on cross-linked polyvinyl alcohol, acrylic acid-vinegar
And saponified acid vinyl copolymers. The fiber-made water-absorbent sheet 3 has a hydrophilic group.
Woven and knitted fabric formed using natural fibers having
And so on. Cotton spun yarn and silk spun yarn as natural fibers
Yarn, wool spun yarn, rayon spun yarn and the like. This
Of these, cotton spun yarn is preferred because of its water retention and low cost.
New As the felt, a woven fabric made of natural fibers is used.
Web made of felt, compressed felt, or short fiber
Needle-punched needle felt etc.
You. The water absorbent sheet 3 containing the water absorbent resin 8
And / or as a composition ratio of the fiber water-absorbent sheet 3
Can take any ratio according to the purpose,
The water absorption performance is 1 to 20 kg / m²Is preferred,
5 to 15 kg / m²Is more preferred. 1 kg of water absorption performance
/ M²Below, it is difficult to achieve the object of the present invention, and 2
0kg / m²In the above, the water permeability with the water absorbent resin 8 interposed
Breakage of the conductive sheet material 9 and the like, making handling difficult.
You. The water absorbing sheet 3 has excellent water absorbing properties.
Have poor water release, and have slightly lower water absorption
And others that show excellent water release,
When the fiber water absorbent sheet 3 is used alone,
By fixing the cover to the dew condensation preventing outdoor cover 1,
After water absorption, the cover may be dried and reused,
The water-absorbent sheet 3 containing the water-absorbent resin 8 having poor water release properties
When used, it is necessary to remove and attach
It is preferable to replace the water-absorbent sheet 3 and use it.
No. The light-shielding and air-permeable sheet 4 includes a light-shielding
A light-shielding rate of 50 to 9
5% is preferable, and 60-95% is more preferable. Shading rate
If less than 50%, the light-shielding effect is undesirably reduced,
When the light-shielding ratio exceeds 95%, the air permeability decreases, which is preferable.
Absent. More specifically, Niro
Thermoplastics such as rubber, polyvinyl chloride and polyolefin
Flat yarn made of fat is used for the weft, and
Thermoplastics such as rubber, polyvinyl chloride and polyolefin
Plain weave using monofilament made of fat for warp or
Mesh sheets woven by leno weave are preferred
No. The thermoplastic resin used in the present invention includes
Within the scope of the present invention due to the purpose of use.
Antioxidants, lubricants, UV absorbers, flame retardants, antistatic
Stoppers, pigments, inorganic fillers, organic fillers, crosslinking agents, foaming
You may mix additives, such as an agent and a nucleating agent. [0021] EXAMPLES Example 1: High density polyethylene (MFR =
1.0 g / 10 min., Density = 0.961 g / cm³)
To form a film by the T-die method,
After slitting, draw 6.8 times by hot plate contact drawing method.
A 1000 d flat yarn was obtained. This flat ya
The yarn density is 10 × 10 yarns / a
I got a plain weave cloth. Low density on both sides of this cloth
Polyethylene (MFR = 12.0 g / 10 min., Dense
Degree = 0.916 g / cm³) At a melt extrusion temperature of 290 ° C
By extrusion lamination method, a laminated layer with a thickness of 30 μm
To obtain a cross sheet. On the other hand, high-density polyethylene (MFR = 1.
1 g / 10 min., Density = 0.951 g / cm³)
And a fineness of 300 using a monofilament molding die.
A monofilament of d was formed. This fineness of 300d
Using a monofilament as a warp, a fineness of 1000 d
Using flat yarn as weft, weft 3 × 14 / in
The mesh sheet was obtained by tangling at the punching density. This
The mesh sheet has a light blocking rate of 95% and a basis weight of 120 g /
m²Met. Monofilament used for this mesh sheet
Mentions and flat yarns have improved weatherability
And 0.3% by weight of carbon black was blended. The water absorbing sheet 3 has two layers of water absorbing properties.
Sodium polyacrylate as water absorbent resin 8 between paper
Is roll-pressed with a thickness of 0.9 mm and a basis weight.
270 g / m², Bulk specific gravity 0.3g / cm³Water-absorbent sea
To 3 and a plain weight weave of 110 g / m
²The water-absorbent sheet 3 was used in combination to form a water-absorbent sheet 3. Next, the mesh sheet is made light-permeable and light-permeable.
Adjust to 5 x 8m as sheet 4 and fold it around all edges
Edge processing was performed, and eyelets 7 were cast at intervals of 30 cm. Ma
In addition, 2 ×
6m is cut, and 30m on one side of 6m and two sides of 2m
Eyelets 7 were cast at cm intervals. Then, light-shielding breathable sheet
The waterproof sheet 2 is placed at the center of the
The side where the second eyelet 7 is not placed is sewn on the light-shielding and breathable sheet 4
And joined. Waterproof sheet 2 of the sheet thus obtained
The water absorbing sheet 3 prepared above is inserted into the lower surface of the
A protective outdoor cover 1 was obtained. The object to be covered is a potato harvested in a field.
At 1.7, as shown in FIG.
Approximately 1 ton collected in a collection container 11 of 1m and height of 1.4m
Arrange the five collected collection containers 11 and obtain them first.
The dew condensation prevention outdoor cover 1 is covered, as shown in FIG.
The eyelets 7 provided on the waterproof sheet 2 and
Pass the string 12 through the eyelets 7 provided around the temper sheet 4
And fixed to the lower part of the collection container 11. Waterproof
The sheet 2 covers the ceiling part 5 of the collection container 11 and is
The temper sheet 4 covered the side part 6. Light shielding and breathable sheet 4
The excess part of the corner that forms the side part 6 is folded
It was fixed inside the part 6. The potatoes thus stored for 4 days
10 is absorbed by the water-absorbent sheet 3.
Or ventilation of the cover side 6
And is not dripped on the potato 10 due to condensation.
In addition, due to the effect of light shielding and ventilation, steam
No loss of potato 10 quality
Was. The amount of water absorbed by the water absorbent sheet 3 is 8 kg / m²So
Was. [0027] As described above, the condensation of the present invention
Outdoor cover, waterproof sheet, water-absorbent sheet,
Combined with light-shielding breathable sheet, andAs a water-absorbent sheet
Water-absorbent sheet containing a water-absorbent resin, having a hydrophilic group
Absorbent sheet made of natural fibersUsing
With this, objects stored outdoors can be
Has waterproof properties exceeding dew and emits from objects
Absorbs moisture and increases temperature due to light-shielding and ventilation effects.
Deterioration of the quality of unloading objects such as agricultural and marine products
Can be covered without letting go, especially potatoes
It is suitably used as a cover.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view schematically showing a dew condensation preventing outdoor cover according to the present invention. FIG. 2 is a cross-sectional view in which a waterproof sheet, a water-absorbent sheet, and a light-shielding and breathable sheet are superimposed. FIG. 3 is an enlarged sectional view of a water absorbent sheet containing a water absorbent resin. FIG. 4 With potatoes stored in a collection container,
(A) is a state where five rectangular collection containers are arranged, (B)
It is explanatory drawing which shows a circular collection container. FIG. 5 is an explanatory view showing a state in which the collection container of FIG. 4 (a) is covered with a dew condensation preventing outdoor cover of the present invention and is bound with a string. [Description of Signs] 1 Dew condensation preventing outdoor cover 2 Waterproof sheet 3 Water absorbent sheet 4 Light shielding air permeable sheet 5 Ceiling 6 Side 7 Eyelet 8 Water absorbent resin 9 Water permeable sheet material 10 Potato 11 Collection container 12 String

Claims (1)

(57) [Claims] [Claim 1] An outdoor cover for covering an object to be stacked such as agricultural products, wherein the outdoor cover is an object to be stacked for agricultural products and the like.
Shielding material that covers the object and forms the base material of the outdoor cover
Temper sheet, superimposed on the central part of the light-shielding breathable sheet
Waterproof, one side of which is joined to a light-shielding breathable sheet
Sheet, and between the waterproof sheet and the light-shielding breathable sheet
It is composed of a water-absorbent sheet
Water-absorbent sheet wherein the sheet contains a water-absorbent resin and / or
Fiber water-absorbent sheet formed of natural fibers having hydrophilic groups
A dew-preventing outdoor cover , characterized by being made of