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Exothermic composition and exothermic body

A heat-generating composition and heat-generating body technology, applied in heat exchange materials, chemical instruments and methods, heating appliances for therapeutic treatment, etc., can solve problems such as poor liquid permeability, reduced water absorption capacity, and damage to drainage. Achieves the effect of maintaining moldability and shape retention, excellent heat generation characteristics, and long-term heat generation

Inactive Publication Date: 2004-05-12
艾饰庭株式会社
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

That is, water-absorbent polymers are generally softened due to swelling caused by absorbing aqueous liquid, and when the resin particles cannot maintain their shape due to remarkably softening to a state close to a fluid state, the liquid permeability becomes poor, impairing the subsequent discharge
This is due to the fact that the components of the heat-generating composition in the heat-generating body are distributed in a sheet form with a constant thickness in the liquid discharge direction, and when the water-absorbing polymer particles near the surface are softened by water absorption and swelling, the gaps between the components and the resin particles are blocked When the migration of excess water inside and outside is restricted, the aqueous solution is prevented from penetrating in the water retaining agent and discharged to the outside, so the migration speed of excess water is greatly reduced
[0011] In order to improve liquid permeability, increase the degree of cross-linking of water-absorbing polymer particles, making the resin particles hard and difficult to deform, but the high degree of cross-linking prevents the swelling of the resin particles and reduces the water absorption capacity

Method used

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  • Exothermic composition and exothermic body
  • Exothermic composition and exothermic body
  • Exothermic composition and exothermic body

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0219] 100 parts by weight of iron powder (DKP, manufactured by Dowa Teppun Co. Ltd.), 8 parts by weight of activated carbon (SA-Super, manufactured by Norit Co. Ltd.), 4 parts by weight of sodium chloride, 0.3 parts by weight of a water-absorbing polymer ( KI-gel 201K, manufactured by Kraray Co. Ltd., 90% or more of particles with a particle diameter of 150 μm or more), 3.0 parts by weight of wood flour (90% or more of particles with a particle diameter of 150 μm or less ) and 0.15 parts by weight of calcium hydroxide were mixed to prepare a non-stick exothermic composition having a liquid permeability of 8, an incremental viscosity of 200 cP, a water migration value of 12 and excess water. The liquid permeability of this non-viscous exothermic composition was 8.

[0220] As shown in FIGS. 1 and 2 , an air-impermeable packaging material obtained by laminating a polyethylene film 3B on a backing paper 3F was designated as a base material 3 . The molded product 2B of the exoth...

Embodiment 2

[0230] The backing paper 3F in the base material 3 in Example 1 is replaced with kraft paper 3E, and an anti-slip layer 8 and a release film 9 are laminated under the kraft paper to obtain an assembly, such as image 3 shown. Figure 4 A cross-sectional view of an assembly obtained by providing an acrylic adhesive layer 7 between a kraft paper 3E and a release film 9 is shown.

Embodiment 3

[0232] Except adding 3 parts by weight of terraballoon instead of the wood flour in Example 1, a heating element was prepared in the same manner as in Example 1. Also, the heating element was sealed in an air-tight outer bag, and left to stand at room temperature for 24 hours.

[0233] After 24 hours, take the heating element out of the outer bag, and test the degree of shape retention, which is 100. Using another heating element produced at the same time, the heating element was similarly taken out of the outer bag and subjected to a heat generation test, reaching 36° within 1 minute, and a long time of 8 hours at 36° or higher.

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Abstract

There are provided a heat-generating composition excellent in moldability, shape retaining property and heat-generating characteristics, and a heat-generating body using the same that can maintain the shape of a molded article of the heat-generating composition irrespective to the pressure inside the container bag and has excellent heat-generating characteristics and long-term heat generation maintaining property. It is a non-viscous heat-generating composition having excessive water characterized in that the heat generating composition generating heat in contact with air comprises, as essential components, a water absorbing polymer, a carbon component, a heat-generating promoter, water and a heat-generating substance, has excessive water, and has an incremental degree of viscosity of less than 1,000 cP and a liquid permeation degree of 5 or more.

Description

technical field [0001] The present invention relates to a heat-generating composition and a heat-generating body, and more specifically, the present invention relates to a heat-generating composition containing a water-absorbing polymer, activated carbon, a heat-generating accelerator, water, a water-retaining agent, and a heat-generating substance as essential components, the heat-generating composition Having excellent moldability, shape retention and heat generation performance, the present invention also relates to a heat generation body with excellent shape retention and long-term heat generation durability. Background technique [0002] In order to prolong the heat generation time, it is necessary for the heat generation composition to have appropriate water holding properties, air permeability and the like. Therefore, various exothermic compositions using water-absorbent polymers have been proposed in recent years. However, when superabsorbent resin powder is used as...

Claims

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Application Information

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IPC IPC(8): A61F7/08A61F7/03C09K5/16
CPCA61F2007/0098C09K5/16A61F7/034
Inventor 臼井薰相田道雄木村久雄百百寿浩
Owner 艾饰庭株式会社
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