Risk analysis of the super heat-resistant temperature range of PS cup covers- Xuancheng Bo Site Commodity Co., Ltd

Risk analysis of the super heat-resistant temperature range of PS cup covers

Deformation and rupture: double loss of beauty and function
A notable feature of PS material is its thermoplasticity at high temperatures, which means that when the ambient temperature exceeds its heat resistance limit, the PS cup lid will quickly soften and lose its original hardness and shape stability. This deformation not only destroys the original aesthetic design of the cup lid, but more importantly, it directly affects the sealing performance of the cup lid. A poorly sealed cup lid cannot effectively prevent liquid leakage, and hot or cold drinks may overflow, causing inconvenience or even safety hazards. For portable beverage containers that rely on the sealing of the cup lid to keep the drink fresh and warm, this change is undoubtedly fatal.

Release of harmful substances: the invisible threat of health risks
More worryingly, high temperatures may also cause small molecules in PS materials, such as styrene monomers, to degrade and be released into the environment. These chemicals pose a potential threat to human health, and long-term contact or ingestion may increase the risk of cancer. Styrene monomer is listed as a possible carcinogen by the International Agency for Research on Cancer (IARC). Although the risk of single exposure is relatively low, frequent use of PS products that do not meet heat resistance standards, especially under high temperature conditions, undoubtedly increases the risk of cumulative exposure. This potential health threat should be taken seriously, especially for children, pregnant women and people with weak immune systems.

Shortened service life: the invisible cost of damaged internal structure
In addition to the obvious deformation and release of harmful substances, high temperature environment will accelerate the aging process of PS cup covers, resulting in a decrease in its overall performance and a significantly shortened service life. Even if there is no obvious change on the surface, the internal structure of the cup lid may have suffered irreversible damage, such as molecular chain breakage, changes in crystallinity, etc. These changes will directly affect the durability and functionality of the cup lid. Therefore, even if there is no rupture or deformation in the short term, long-term use of PS cup covers that exceed the heat resistance range will find that its sealing performance is gradually weakened, and it may even no longer meet basic usage needs.

Safety Use Recommendations
In view of the above risks, consumers should pay special attention to the following points when using PS cup covers: First, understand and comply with the heat resistance temperature limit in the product manual, and avoid pouring hot drinks directly into the container with PS cup covers; second, choose cup lids marked with higher heat resistance grades (such as PP, PET and other materials) as alternatives, as these materials usually have better high temperature resistance; finally, for PS cup covers that have deformed, discolored or have reduced sealing performance, stop using them immediately and replace them with new products that meet safety standards.