| 摘要 |
There is disclosed a mixture for use in the manufacture of a thermal pack which mixture comprises a first or phase change material and a second material having a relatively high heat capacity. The first material and the second material have characteristics for enabling them to form a solution. Preferably, the first material is searic acid and the second material is rapeseed oil. The first and second material are preferably present in a ration in the range 1:1-1:4, most preferably 3:7.
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