| abstract |
In the present invention, the D-lactic acid content is in the range of 4% by weight to 12% by weight, the biodegradability is 90% or more, and the shrinkage in the main contraction direction (lateral direction) after immersion in 70 ° C. hot water for 10 seconds is 20% to 70%. The present invention relates to a biodegradable heat shrinkable film having a residual stress of 0.05 kg f / mm 2 or more after being immersed in hot water at 90 ° C. for 10 seconds and a method for producing the same.n n n The biodegradable heat shrink film according to the present invention not only has excellent basic properties such as shrinkage, mechanical properties, transparency, etc., but also reduces shrinkage speed and increases residual stress, thereby providing excellent shrink uniformity when labeling bottles or containers, Its biodegradability is high and it is environmentally friendly. |