JPS63281648A - Preparation of pack for heat accumulating agent - Google Patents

Abstract

PURPOSE:To efficiently prepare a heat accumulating pack without allowing a heat accumulating agent to adhere to the seal part at the opening part of a pacing bag, by filling the packing back made of a heat resistant air impervious material with a non-woven fabric impregated with the liquid heat accumulating agent under a degassing vacuum condition and subsequently heat-sealing the opening part of the packing the bag to hermetically seal the same. CONSTITUTION:After an air impervious packing bag is filled with a non-woven fabric impregnated with a liquid heat accumulating agent under a degassing vacuum condition, the opening part of the packing bag is heat-sealed to be hermetically sealed. As the nonwoven fabric, various ones can be used alone or in a laminated state. As the heat accumulating agent, any one liquid or capable of being made liquid at the time of filling may be used and, for example, polyethylene glycol is designated. As he packing bg filled with the nonwoven fabric impregnated with the heat accumulating agent, one composed of a composite material having air impervious heat resistant plastic such as polyester or polyamide, or polyethylene or polypropylene heat-sealable to a surface material such as an aluminum foil laminated thereto as an inner layer is used.

Description

DETAILED DESCRIPTION OF THE INVENTION Industrial Closure The present invention heats the heat storage agent filled inside and inside the body by heating it with electric heat, hot water, etc. to store heat, and then uses the heat dissipation effect to create a pocket warmer. The present invention relates to a method of manufacturing a heat storage agent pack used as a heat storage agent pack.

Conventionally, heat storage packs have been known that are heated with electric heat, hot water, etc., and then gradually radiate heat to be used as a pocket warmer. and a powder or liquid heat storage agent were simultaneously filled into a non-breathable packaging bag and vacuum packaged.

Problems that Ming attempts to solve However, in the method of manufacturing a heat storage agent pack, the method of vacuum packaging a nonwoven fabric and a powdered heat storage agent at the same time uses powder, which makes the vacuum packaging operation complicated. On the other hand, when a liquid heat storage agent is used, the liquid heat storage agent adheres to the part of the opening of the packaging bag that should be heat sealed, making it difficult to seal the opening with thermal adhesive, making vacuum packaging difficult. A situation may arise.

The present invention has been made in view of the above circumstances, and when a packaging bag is filled with a heat storage agent and vacuum packaged, the heat storage agent does not adhere to the opening of the packaging bag that should be heat sealed, and therefore vacuum packaging is performed. To provide a method for manufacturing a heat storage agent pack that can be carried out smoothly and reliably, efficiently and easily.

Means and Action for Solving the Problems In order to achieve the above object, the inventors of the present invention have made extensive studies, and as a result, have filled a packaging bag made of a heat-resistant, non-breathable material with a liquid heat storage agent together with a non-woven fabric. In the vacuum packaging method, a nonwoven fabric is impregnated with a liquid heat storage agent, and the nonwoven fabric impregnated with the heat storage agent is filled into a packaging bag and vacuum packaged.
When filling with a heat storage agent, the vacuum packaging will not become a solid layer due to liquid heat storage agent adhering to the part of the opening of the packaging bag that should be heat sealed, and it will also prevent the vacuum packaging from becoming a solid layer, as would be the case when a powdered heat storage agent is used. The inventors have discovered that vacuum packaging can be carried out efficiently without making the packaging complicated, leading to the present invention.

The present invention will be explained in more detail below.

The method for manufacturing a heat storage agent pack according to the present invention includes vacuum filling a non-woven fabric impregnated with a liquid heat storage agent into a non-breathable packaging bag, and then sealing the opening of the packaging bag by thermal bonding.
The nonwoven fabric impregnated with a heat storage agent is vacuum packaged in the packaging bag.

Here, the method of the present invention uses a nonwoven fabric impregnated with a liquid heat storage agent, but this nonwoven fabric can be any of the same types of nonwoven fabrics that are used to fill and package conventional heat storage agent packs together with the heat storage agent. It is possible to use one sheet or a plurality of sheets stacked on top of each other.

Further, the heat storage agent to be impregnated into the nonwoven fabric may be any heat storage agent that is in a liquid state or can be made into a liquid state during filling, such as polyethylene glycol. The amount of heat storage agent to be impregnated into the nonwoven fabric is determined by the heat storage capacity required for the heat storage agent pack, but the amount of heat storage agent required to obtain the heat storage capacity determines the maximum amount that can be impregnated into the nonwoven fabric used. If the amount exceeds the amount, the amount may be impregnated into several sheets of nonwoven fabric in an amount that does not cause problems such as seepage from the nonwoven fabric during filling.

Next, packaging bags to be filled with nonwoven fabric impregnated with a heat storage agent include polyethylene, polypropylene, etc., which are heat-adhesive to non-breathable and heat-resistant plastics such as polyester film and polyamide, and surface materials such as aluminum foil. It is preferable to use a packaging bag made of a composite material with an inner layer of
Various types of bags can be used, such as multiple bags such as double bags and triple bags.

Next, in the present invention, the nonwoven fabric impregnated with the liquid heat storage agent as described above is deaerated and vacuum-filled into a packaging bag made of a heat-resistant, non-breathable material, and then the opening of the packaging bag is thermally bonded. Vacuum packaging for sealing is performed, and this vacuum packaging method can be carried out by any conventional method.

In this case, in the present invention, since the nonwoven fabric is impregnated with the liquid heat storage agent and then filled into the packaging bag as described above, even if the heat storage agent is liquid during filling, the opening of the packaging bag is thermally sealed. There is no inconvenience such as the heat storage agent adhering to the target area and hindering heat sealing, and the opening can be easily thermally bonded, and since the heat storage agent is not in powder form, vacuum packaging can be easily performed. It is.

The method of using the heat storage agent pack manufactured according to the present invention is the same as the conventional one, in which a planar heating element is placed on the surface of the packaging bag to provide a sufficient amount of heat, and the heat storage agent is solidified in some cases at a low temperature. The heat storage agent pack is heated by an appropriate method such as electric heating or hot water, and the heat is radiated.

As explained above, according to the method of the present invention, a packaging bag is filled with a liquid heat storage agent impregnated into a nonwoven fabric.
The heat storage agent does not adhere to the portion of the opening of the packaging bag that should be sealed during filling, allowing easy vacuum packaging and efficient production of the heat storage agent pack.

Claims (1)

[Claims] 1. After a non-woven fabric impregnated with a liquid heat storage agent is degassed and vacuum-filled into a non-breathable packaging bag, the opening of the packaging bag is sealed by thermal adhesive, and the nonwoven fabric impregnated with a liquid heat storage agent is vacuum-filled inside the packaging bag. A method for producing a heat storage agent pack, the method comprising packaging the heat storage agent pack.