LONG-ACTING ICE PACK

Abstract

A long-acting ice pack includes a mixture of a cold preservation substance and a gel therein. The gel is mixed with a plurality of heat-insulating particles. For a portion of the ice pack, the heat-insulating particles can be used to block the transmission of the interior temperature of the ice pack and the outside temperature so as to decrease the area and efficiency of temperature transmission. The ice pack not only effectively extends the time of cold preservation, meeting the demand of ice compress or cold preservation for a long time, but also provides the most comfortable temperature for ice compress, without using a towel to cover the ice pack.

Claims

1. A long-acting ice pack, comprising a mixture of a cold preservation substance and a gel therein, and characterized in that the gel is mixed with a plurality of heat-insulating particles.

2. The long-acting ice pack as claimed in claim 1, wherein the cold preservation substance is one of methylcellulose and acrylic acid polymer.

3. The long-acting ice pack as claimed in claim 1, wherein the gel is a high water-absorbing molecular polymer.

4. The long-acting ice pack as claimed in claim 2, wherein the gel is a high water-absorbing molecular polymer.

5. The long-acting ice pack as claimed in claim 1, wherein the cold preservation substance and the gel are disposed in a waterproof layer, and the waterproof layer is covered with an outer covering layer.

6. The long-acting ice pack as claimed in claim 1, wherein the heat-insulating particles are made of Styrofoam material.

7. The long-acting ice pack as claimed in claim 1, wherein the heat-insulating particles each have one of a block shape, a strip shape, a sheet shape, and a spherical shape.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0009] FIG. 1 is a structural schematic view of a conventional ice pack;

[0010] FIG. 2 is a structural schematic view of the present invention;

[0011] FIG. 3 is a schematic view of the present invention, showing the heat-insulating particles used to block the transmission of the interior temperature of the ice pack and the outside temperature for a portion of the ice pack; and

[0012] FIG. 4 is a schematic view showing the temperature and time curves of a comparison between the conventional ice pack and the ice pack of the present invention.

DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] In order to understand the present invention, embodiments of the present invention will now be described, by way of example only, with reference to the accompanying drawings.

[0014] As shown in FIG. 2, the present invention discloses a long-acting ice pack. An ice pack 2 comprises a mixture of a cold preservation substance 21 and a gel 22 therein. The cold preservation substance 21 may be one of methylcellulose and acrylic acid polymer, but not limited thereto. The gel 22 may be a high water-absorbing molecular polymer, but not limited thereto. The cold preservation substance 21 and the gel 22 are disposed in a waterproof layer 24. The waterproof layer 24 is covered with an outer covering layer 25. The present invention is characterized in that the gel 22 is further mixed with a plurality of heat-insulating particles 23. The heat-insulating particles 23 may be made of Styrofoam material, but not limited thereto.

[0015] The mixing ratio of the heat-insulating particles 23 can be increased or decreased as necessary. If the ratio is increased, the portion of the ice pack for blocking the transmission of the interior temperature of the ice pack and the outside temperature will be increased. That is to say, the interior and exterior temperatures of the ice pack won't exchange easily. For the ice pack 2, the time of cold preservation time is prolonged, but the temperature sensed by the human body is relatively high during ice compress. On the contrary, if the mixing ratio of the heat-insulating particles 23 is reduced, the portion of the ice pack for blocking the transmission of the interior temperature of the ice pack and the outside temperature will be decreased. That is to say, the interior and exterior temperatures of the ice pack will exchange easily. For the ice pack 2, the time of cold preservation time will be shortened, but the temperature sensed by the human body will be relatively low during ice compress.

[0016] As shown in FIG. 3, to practice the present invention, the ice pack 2 is first put into a freezer and frozen for a period of time. The mixture of the cold preservation substance 21 and the gel 22 will be frozen. When the ice pack 2 is taken out from the freezer for use, the low temperature of the cold preservation substance 21 is blocked by the heat-insulating particles 23 so that the area of temperature exchange with the outside is greatly reduced. The temperature exchange is performed via the gap between the heat-insulating particles 23 or the gel 22. Thus, the ice pack of the present invention is able to provide an appropriate temperature for ice compress at the initial stage of use, without using a towel to cover the ice pack 2. Moreover, the heat-insulating particles 23 are configured to reduce the area of temperature exchange, such that the temperature of the ice pack 2 can be kept for a long time effectively.

[0017] FIG. 4 is a schematic view showing the temperature and time curves of a comparison between the conventional ice pack 1 and the ice pack 2 of the present invention. The entire area of the conventional ice pack 1 can perform temperature exchange, so its temperature rises fast with time (curve 1). On the contrary, the ice pack 2 of the present invention has the heat-insulating particles 23 to reduce the area of temperature exchange, which can preserve cold effectively. Thus, the time of cold preservation can be extended effectively (curve 2).

[0018] Although particular embodiments of the present invention have been described in detail for purposes of illustration, various modifications and enhancements may be made without departing from the spirit and scope of the present invention. Accordingly, the present invention is not to be limited except as by the appended claims.