1. Poor heat resistance: Due to the relatively low heat resistance of PLA and PBS, the heat stability of this straw is poor. The glass transition temperature of PLA is about 60℃, and that of PBS is about 80℃. This means that when using high-temperature liquid, the straw is easy to deform, soften and break, which limits its application scenarios.
2. Lack of toughness: PLA and PBS straws are relatively poor in toughness and easy to break when impacted or bent by external force. This may cause safety hazards during use.
3. The cost is relatively high: PLA and PBS are biodegradable materials, but the production cost is relatively high. This may limit their use in some fields, such as disposable tableware.
4. Limitation of degradation conditions: PLA and PBS straw can be biodegraded under certain conditions, but their degradation process is affected by many factors such as temperature, humidity and microbial species. Under some conditions, the degradation rate of these straws may be slow, or even may not be completely degraded.
It should be noted that although PLA and PBS straws have some shortcomings, they are still favorable choices for degradable straws in appropriate scenarios. When choosing to use this kind of straw, we should fully consider its performance characteristics and use requirements, and ensure that its use environment meets its degradation conditions.