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Cold-storage agent

A cooling storage agent and drying technology, applied in the direction of heat exchange materials, chemical instruments and methods, etc., can solve the problems of water absorption deviation, insufficient freezing and cooling performance, unable to become a fully uniform gel, etc., and achieve long maintenance time. , easy to handle effect

Inactive Publication Date: 2013-04-10
高木千代美 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The cold storage material for freezing proposed by the present inventors freezes in a short time and has an excellent cold storage effect for a long time, but it contains propylene glycol as a coolant and is not a completely natural raw material product
In addition, it was confirmed that the cool storage agent described in Patent Document 2 is formed in the air when the carboxymethyl cellulose is made into a paste form, so bubbles that cause variations during radiation irradiation are generated, and a sufficiently uniform gel cannot be obtained. , the water absorption is deviated, so the freezing and cold storage performance is insufficient

Method used

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Examples

Experimental program
Comparison scheme
Effect test

manufacture example 1

[0033] [Manufacturing Example 1]

[0034] Inject 12L of ion-exchanged water into the mixing tank (inner capacity 60L) of the vacuum mixing device and add 3kg of powdered sodium carboxymethyl cellulose ("SUNROSE F350HC-4" manufactured by Nippon Paper Co., Ltd.), with water and carboxymethyl The total amount of cellulose was added to 15L. At this time, in order to suppress flying of the powdered sodium carboxymethylcellulose, it was added while spraying water from above the powder. After the raw materials were added, the lid of the vacuum kneading device was closed, and the mixture was stirred in the vacuum kneading device for 40 minutes while performing vacuum suction to prepare a cellulose kneaded product.

[0035] Next, the cellulose kneaded product was molded in a vacuum and irradiated with 14 kGy electron beams to prepare a crosslinked cellulose gel. The cross-linked cellulose gel was transferred to a dryer and dried at about 70°C.

[0036] 55 g (5% of the total amount ...

Embodiment 1

[0040] 1100 g of the cool storage agent prepared in Production Example 1 was filled in a cool storage box (width 19.5 cm x length 26 cm x thickness 3.5 cm), and the freezing time and cold storage time were measured.

[0041]

[0042] After the cooling storage box was left at room temperature, it was placed in a fanless freezer at -35°C to cool for 24 hours, and the time required for freezing was measured. The results are shown in figure 1 .

[0043] The initial temperature of the cold storage agent is 10.4°C. About 1 hour and 10 minutes after it is placed in the freezer, the temperature of the cold storage agent drops sharply to -10°C, completes freezing in about 2 hours and 20 minutes, and reaches -17.6°C after 6 hours.

[0044]

[0045] Put the cooling agent box cooled in the freezer at -35°C for 24 hours in a box made of expanded styrene (width 32cm x length 51cm x height 15cm), and place the box made of expanded styrene at room temperature Next, the temperature insi...

Embodiment 2

[0057] 650 g of the cool storage agent prepared in Production Example 1 was filled in a cool storage agent box (width 15 cm x length 26.5 cm x thickness 2 cm), and the freezing time and cooling time were measured.

[0058]

[0059] After the cooling storage box was left at room temperature, it was placed in a fanless freezer at -35°C to cool for 24 hours, and the time required for freezing was measured. The results are shown in image 3 .

[0060] The initial temperature of the cold storage agent is 13°C. About 50 minutes after being placed in the freezer, the temperature of the cold storage agent drops sharply to -5°C, completes freezing in about 3 hours and 10 minutes, and reaches -27.1°C after 6 hours.

[0061]

[0062] Put the cooling agent box cooled in the freezer at -35°C for 24 hours in a box made of expanded styrene (width 32cm x length 51cm x height 15cm), and place the box made of expanded styrene at room temperature Next, the temperature inside the box made o...

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Abstract

Disclosed is a cold-storage agent that comprises halite, water, and 2-4 wt% of a dry crosslinked cellulose gel obtained by radiating an electron beam at a cellulose mixture paste obtained by mixing water and 15-25 wt% cellulose in a vacuum.

Description

technical field [0001] The present invention relates to a cold storage agent, in particular to a cold storage agent which is formed only from natural raw materials, freezes in a short time, and exerts a long cold storage effect. Background technique [0002] Coolant is used to maintain fresh food and other products in a low temperature state for direct transportation. For the cold storage agent used for the transportation of fresh food and other products, it is required to freeze multiple cold storage agents at the same time in 5 to 8 hours / 4 according to the transportation arrangement (in the usual way of use. In this case, it is necessary to wait for all The cold storage agent is frozen. Usually it is frozen in the freezer for a minimum of 5 hours and a maximum of 8 hours.) It is frozen in a short period of time, and the cold preservation effect is not reduced during long-distance transportation and long-term storage, but it is now on the market There is no cool storage t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/08C08J3/28C08L1/02
CPCC08J3/075C08B11/12C08B15/005C08B15/10C08J3/28C08J2301/02C08L1/08C08L1/286C09K5/08
Inventor 清水刚清水奈津惠
Owner 高木千代美
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