JPH055838U - Coolant - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a cooling material suitable for keeping cold such as fresh vegetables, fish meat, fruits, and flowers. A cooling material comprising a water-permeable top sheet and a water-impermeable back sheet, and a cooling body having a water-permeable sheet coated with a heat-absorbing agent and a water-absorbing agent that act by cooling with water. Since this coolant absorbs water droplets adhering to the object to be cooled and exerts a cooling action, it is possible to reduce the amount of water adhering to the object to be cooled, less damage to the product, and cooling for a long time. Can be sustained.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

  The present invention relates to a cooling material for fresh vegetables and fish meat.

[0002]

[Prior art]

  Conventionally, it is used for cooling compresses, food storage cooling, leisure, etc. Cooling by the contact between an endothermic agent such as an inorganic salt that acts as a cooling agent and an aqueous substance composed mainly of water. For example, a simple coolant to be removed is disclosed in Japanese Patent Laid-Open Nos. 63-234082 and 64-64. 24882, JP-A-64-40590, JP-A-1-204989. It is proposed in Japanese Patent Laid-Open No. 1-319583.

[0003]

[Problems to be solved by the device]

  A conventional simple coolant is a water containing mainly an endothermic agent and water that cools by contacting with water. Since the active substances are mixed at once, the minimum temperature is reached in a short time, and To keep the temperature as long as possible to utilize the cooling effect. But getting cold The cooled object is not cooled immediately, and the simple coolant is condensed by the time the cooled object is cooled. It is surrounded by water drops that reduce the cooling effect. In addition, fresh vegetables, fish and fruits When the object to be cooled such as is cooled, the removal of water droplets attached to it becomes a problem. Large amount If the temperature rises while keeping the water attached, the storability will be impaired and product damage will occur quickly. It becomes an unfavorable state.

[0004]   The purpose of the present invention is to provide a cooling material suitable for keeping cold such as fresh vegetables, fish meat, fruits, and flowers. To provide.

[0005]

[Means for Solving the Problems]

  The present invention covers a heat absorbing agent and a water absorbing agent, which have a cooling effect by interacting with water, with a water-permeable sheet. The cooled cooling body was inserted between the water-permeable top sheet and the water-impermeable back sheet. Is a coolant.

[0006]

[Action]

  The present invention covers a heat absorbing agent and a water absorbing agent, which have a cooling effect by interacting with water, with a water-permeable sheet. The cooled cooling body is placed between the water-permeable top sheet and the water-impermeable back sheet. By doing so, it absorbs water droplets adhering to the objects to be cooled such as fresh vegetables and fish meat and cools them. It exerts its action and, in combination with the action of the water-absorbing agent, can maintain the cooling state for a long time. Wear. Further, the amount of water attached to the object to be cooled can be reduced.

[0007]

【Example】

  Next, the coolant of the present invention will be described with reference to the drawings and examples. The parts in the examples And% are by weight unless otherwise stated.

[0008]   FIG. 1 is a schematic cross-sectional view of an example of a coolant, in which the endothermic agent cooling composition 2 is a sheet-like fiber. Outside of the cooling body covered with the water permeable sheet 3 made of fiber products or perforated polymer film On the surface on which the object to be cooled is placed, such as a sheet-like fiber product or a perforated polymer film. Water-permeable top sheet 4 consisting of a non-water-permeable material such as a hydrophobic polymer film on the back side With a cooling backsheet 5 obtained by joining 6 with both sides and joining 6 at the sides. is there.

[0009]   FIG. 2 is a schematic view showing a mixed state of the endothermic agent cooling composition, which is cooled by acting with water. Endothermic agent 7 that acts and absorbs excess water that enters the coolant, and acts on the endothermic agent This is an example in which the water absorbing agent 8 for adjusting the amount of water is allowed to exist in a mixed state.

[0010]   FIG. 3 is a schematic diagram showing a sealed state of the endothermic agent cooling composition, which acts by cooling with water. Endothermic agent 7 that acts and absorbs excess water that enters the coolant, and acts on the endothermic agent The water absorbing agent that adjusts the amount of water should contain 25% by weight or less of the amount of water that reacts with the heat absorbing agent. In a state where the water-containing water-absorbing agent portion 9 isolated by a sheet-like material that is torn by an external force is enclosed. It is an example of the existence. This coolant is initially cooled with the water contained in the water absorbent. The subsequent cooling and cooling is performed by absorbing the moisture adhering to the object to be cooled. It is effective for objects to be cooled that have a low moisture content and leaching moisture.

[0011]   The endothermic agent used in the cooling body of the present invention causes an endothermic reaction when dissolved in water, which is preferable. Preferably, the compound has a solubility of 10 g or more in 100 g of water, and It is selected in consideration of qualitative, safety and cost. Examples of the compound include glass Ammonium acid, sodium nitrate, sodium nitrite, potassium nitrate, potassium bromide Examples thereof include sodium, sodium thiosulfate, and urea. Only one compound selected Alternatively, a mixture of two or more kinds may be used.

[0012]   As the water absorbing agent, a commonly used water absorbing agent is applied. For example, crushed pulp, starch Treated products of graft polymers such as acrylonitrile and acrylic acid, carboxymethy Crosslinked products such as cellulose and modified polyvinyl alcohol, isobutylene / anhydrous Cross-linked products such as maleic acid copolymers and partially neutralized polyacrylic acid salts, or cross-linked products thereof For example, crushed pulp or crushed cotton-like material that supports the body is used. Of this water absorbent The amount of water in the cooling body is the amount of water supplied from the object to be cooled, the water absorbing capacity of the water absorbing agent, and the heat absorbing agent. Although it depends on the amount of heat absorbed, etc., it is usually 3 to 50% by weight, preferably 5 to 30% by weight. The amount is%. If the amount of water absorbing agent is too small, the amount of water in the coolant will not work effectively and The amount of water that acts on the heat agent increases, maintaining the cooling effect and absorbing water from the object to be cooled. I can't get it. Furthermore, it is preferable that the endothermic agent that has become liquid by reacting with water is leached out. There are things that are not right. On the other hand, when the amount of water absorbing agent is large, the amount of water acting on the heat absorbing agent is small. It becomes impossible to obtain a sufficient cooling effect.

[0013]   The water permeable sheet covering the heat absorbing agent and the water absorbing agent and the water permeable top sheet of the exterior are A sheet-like material that allows water from the object to be cooled to permeate through without allowing the contents to easily leach. For example, a non-woven fabric of extra fine fibers obtained by the melt blown method or a special method or its addition. If necessary, mix cellulose fibers and thermal binder fibers with engineering sheets and ordinary synthetic fibers. Thermoformed sheet of non-woven fabric obtained by fiber, perforated polymer sheet, non-woven fabric or woven fabric and perforated weight Examples include a laminated sheet of a united sheet and a paper-like material. In addition, the non-permeable backsheet of the exterior The sheet is a sheet-like material from which the contents do not leach, such as polyethylene and polypropylene. Sheets of flexible polymer such as len, polyvinyl chloride, polyurethane, synthetic rubber A laminated sheet obtained by laminating the above-mentioned flexible polymer sheet on a non-woven fabric or a woven fabric, a non-woven fabric or a knitted fabric Examples thereof include a sheet-like material obtained by impregnating and / or coating a woven fabric with a flexible polymer.

[0014]   The cooling material of the present invention can be made into a water-permeable sheet wrapping bag of a desired size according to the purpose of use. The heat-absorbing agent and the water-absorbing agent, and seal the cooling element on the surface of the object to be cooled. Cover the backside of the water-based topsheet with a water-impermeable backsheet and To form a coolant.

Example 1 A mixture was prepared by mixing 100 parts of ammonium nitrate and 100 parts of urea as an endothermic agent, and 100 parts of pulverized pulp containing a crosslinked carboxymethyl cellulose as a water absorbing agent. As the water-permeable sheet for the interior and the water-permeable top sheet for the exterior, 85 parts of polyester short fibers having a fineness of 1 dr and a fiber length of 38 mm, and 15 parts of polyester composite fiber having a fineness of 2 dr and a fiber length of 38 mm were mixed with the thermal binder fiber. Then, a fiber web having an average weight of 65 g / m ² is prepared with a dry web bar, and a fiber sheet having the fibers fixed by hot pressing is prepared. As a non-water-permeable back sheet for one exterior, polyethylene fiber is added to the fiber sheet. A sheet obtained by laminating the above with a thermocompression bonding method was prepared.

[0016]   Make a rectangular inner bag with a water-permeable sheet, put the cooling mixture in it and use the ultrasonic method. Adhere with to make a cooling body, and on both sides of it a water-permeable top sheet and a water-impermeable back sheet. And the edges were bonded by ultrasonic method to make a coolant. This coolant is rubbed It never gets cold. Distribute this coolant under the freshly landed fish and transport it by truck. Then, the cooling material developed an appropriate cooling effect due to moisture from the fresh fish and vibration during transportation. It was Furthermore, the cushioning effect is obtained, and the cold temperature of the car is lowered to a very low level even after about 10 hours of transportation. Even if you do not lower it, a uniform cooling effect can be obtained, sufficient freshness is maintained and taste is deteriorated. I was able to transport without.

Example 2 As a heat absorbing agent, a mixture of 100 parts of ammonium nitrate and 100 parts of urea was prepared. Further, 100 parts of crushed pulp containing carboxymethyl cellulose crosslinked water containing 40 parts of water was used as a separating agent, and the fineness was 1dr, 90 parts of polyester short fibers having a fiber length of 38 mm, the thermal binder fiber had a fineness of 2 dr and a fiber length of 38 mm. 10 parts of the polyester-based composite fiber was mixed, and a fiber web having an average weight of 20 g / m ² was prepared with a dry web bar, and the fiber web was heat-pressed and enclosed in a bag made of a fiber sheet in which the fibers were fixed. The heat absorbing agent and the water absorbing agent in a bag were sealed in a water permeable sheet bag in the same manner as in Example 1 to form a cooling body, and then packaged in the same manner as in Example 1 to form a cooling material.

[0018]   This coolant is used for shipping and displaying refrigerated fruits and polyethylene-bagged fruits. When rowing, rub the water-absorbent bag in advance and put it in the fruit-filled bag. And absorbs the water droplets that have condensed in the fruit bag, reducing the cooling effect and condensation and damaging the product. The suppressing effect was obtained.

[0019]

[Effect of device]

  The cooling material of the present invention is produced from objects to be cooled, such as fresh vegetables, fish meat, fruits, and flowers. Since it absorbs water droplets and exerts a cooling effect, it reduces the amount of water that adheres to the object to be cooled. It is possible to maintain the cooling condition for a long time. Wear.

[Brief description of drawings]

FIG. 1 is a schematic sectional view of an example of a coolant of the present invention.

FIG. 2 is a schematic view showing a mixed state of the endothermic agent cooling composition of the present invention.

FIG. 3 is a schematic view showing a sealed state of the endothermic agent cooling composition of the present invention.

[Explanation of symbols]

1 coolant, 2 endothermic agent cooling composition, 3 water-permeable sheet, 4 water-permeable topsheet, 5 non-permeable backsheet, 6 joints, 7 endothermic agent, 8 water absorbent, 9 Water-containing water absorbent part.

Claims (2)

[Scope of utility model registration request] 1. A cooling body comprising a water-permeable sheet coated with a heat-absorbing agent and a water-absorbing agent that act on water to cool the water-permeable top sheet and a water-impermeable back sheet. Coolant. 2. An endothermic agent that acts on water to perform a cooling action,
The coolant according to claim 1, wherein a water absorbing agent containing 25% by weight or less of the amount of water that reacts with the heat absorbing agent is isolated and a cooling body covered with a water permeable sheet is interposed.