| abstract |
As a result of revealing the relationship between the crystallinity and performance of the biodegradable resin, the weight average molecular weight and the strength, and the weight average molecular weight and performance, the polylactic acid contained amorphous polylactic acid, and the polylactic acid had a weight average molecular weight of 40,000? By using a microneedle array having 100,000 microneedles, a microneedle array capable of maintaining its functional performance was obtained. |