Polylactic acid-based resin composition, polylactic acid-based film, molded product using the film, elongated film, heat-shrinkable label, and container having the label thereon
View Patent ↗A polylactic acid-based resin composition comprising: 50-90 mass % of a polylactic acid-based resin (A); and 10-50 mass % of a polyolefin-based resin (B), heat quantity of crystallization of the polyolefin-based resin (B) being 40 J/g or less as measured by using differential scanning calorimeter as measured at a thermal process comprising the steps of: heating up to 200° C. at a heating rate of 10° C./min; keeping the temperature at 200° C. for 5 minutes; and cooling down to the room temperature at a cooling rate of 10° C./min. The invention also provides: The composition may be applied, for example, to produce a polylactic acid-based film, a molded product using the film, an elongated film, a heat-shrinkable label, and a container having the heat-shrinkable label.
1. A polylactic acid-based resin composition comprising:
50-90 mass % of a polylactic acid-based resin (A); and 10-50 mass % of polyolefin-based resin (B),
heat quantity of crystallization of the polyolefin-based resin (B) being 40 J/g or less as measured by differential scanning calorimeter at a thermal process comprising the steps of: heating up to 200° C. at a heating rate of 10° C./min; keeping the temperature at 200° C. for 5 minutes; and cooling down to the room temperature at a cooling rate of 10° C./min.
2. A polylactic acid-based film comprising:
a resin composition comprising: 50-90 mass % of a polylactic acid-based resin (A); and 10-50 mass % of polyolefin-based resin (B),
internal haze of the film per micrometer (μm) in thickness is below 0.45%, heat quantity of crystallization of the polyolefin-based resin (B) being 40 J/g or less as measured by differential scanning calorimeter at a thermal process comprising the steps of: heating up to 200° C. at a heating rate of 10° C./min; keeping the temperature at 200° C. for 5 minutes; and
cooling down to the room temperature at a cooling rate of 10° C./min.
3. A laminated body having at least one layer of the polylactic acid-based film according to claim 2 .
4. An elongated film, wherein the polylactic acid-based film according to claim 2 is elongated at least in one direction.
5. An elongated film, wherein the laminated body according to claim 3 is elongated at least in one direction.
6. A heat-shrinkable film, wherein the polylactic acid-based film according to claim 2 is elongated at least in one direction and of which heat shrinkage ratio in the main shrinking direction is 20% or more as measured after immersing the film in hot water of 80° C. for 10 seconds.
7. A heat-shrinkable film, wherein the laminated body according to claim 3 is elongated at least in one direction and of which heat shrinkage ratio in the main shrinking direction is 20% or more as measured after immersing the film in hot water of 80° C. for 10 seconds.
8. A molded product being formed from the polylactic acid-based film according to claim 2 .
9. A molded product being formed from the laminated body according to claim 3 .
10. A molded product being formed from the elongated film according to claim 4 .
11. A molded product being formed from the heat-shrinkable film according to claim 6 .
12. A heat-shrinkable label using the heat-shrinkable film according to claim 6 as the base material.
13. A container having the heat-shrinkable label according to claim 12 thereon.
14. A molded product being formed from the elongated film according to claim 5 .
15. A molded product being formed from the heat-shrinkable film according to claim 7 .
16. A heat-shrinkable label using the heat-shrinkable film according to claim 7 as the base material.