HOTHOUSE AND HEAT-RETENTION COVER HAVING HEAT RETAINING PROPERTIES AND TRANSPARENCY

摘要

PROBLEM TO BE SOLVED: To provide a hothouse and a heat-retention cover which have both light-use properties and heat-retaining properties.SOLUTION: A film contains, based on synthetic resin 100 pts.wt., a hydrotalcite compound 1-20 pts.wt., the hydrotalcite compound represented by general formula (1): MgAl(OH)(CO)/mHO (where X is in the range of 4.0X6.5 and m represents 0 or a positive number), the hydrotalcite compound in which a molar ratio Robtained by 2 of a (110) face based on the X-ray diffraction method and a molar ratio Robtained by chemical analysis satisfy |R-R|0.7, and the use of such a film allows a hothouse or a heat-retention cover to have both transparency and heat retaining properties.