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AssigneeToda Kogyo Corporation
InventorsKanae Honmyo, Torayuki Honmyo
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The present invention relates to a heat retaining agent for agricultural films comprising hydrotalcite-type particles which can satisfy all of a transparency required for heat retaining agents for agricultural films, dispersibility in resins, and handling property at a high level. According to the present invention, there are provided hydrotalcite-type particles having an oil absorption of not more than 35 mL/100 g and a ratio of an oil absorption to a plate surface diameter (oil absorption/plate surface diameter) of 140 to 190; a heat retaining agent for agricultural films comprising the hydrotalcite-type particles; and an agricultural film comprising the heat retaining agent for agricultural films.
Hydrotalcite particles having an oil absorption of not more than 35 mL/100 g, a tap density ρt of not less than 0.55 g/cc, a plate surface diameter of not more than 0.25 μm and a ratio of oil absorption to a plate surface diameter (oil absorption/plate surface diameter) of 140 to 190.
Dependencies are inferred from the claim text.