PC vs PCTG: Showdown in Plastic Water Cup Production (Part 2)

There are stories in every cup, and warmth in everyday life. Hello everyone, welcome to "Dong Dong's Cup Talk"

Summer is the peak sales season for plastic water cups. At this time each year, many customers confused about plastic materials leave me messages. Their questions vary greatly, yet all center on material safety. https://www.zhanyict.com/en/ProductsDetail-VB-10475.htmlMany people worry that unsafe plastic cup materials may harm their health. Today I’ll give an in-depth comparison of the two most easily confused material combinations: the differences between PC and PCTG, as well as between PP and PPSU.

With years of deep involvement in the water cup industry, I will reference technical data from our factory’s professional material engineers, combined with mass production practice, performance test reports and real-life application scenarios. https://www.zhanyict.com/en/ProductsDetail-VB-10475.htmlI’ll break down the core distinctions among these four materials, analyzing them in terms of safety, mechanical performance, temperature resistance, drop resistance and suitable crowds, to help you tell these look-alike materials apart and pick the right drinking container.

3. Human Safety (The Key Dividing Line)

PC Material

Its molecular chain contains Bisphenol A (BPA), an endocrine disruptor. Long-term intake disturbs human hormone balance and poses great harm to the growth and development of infants and adolescents.

China has explicitly banned PC from being used in baby bottles, and the EU has fully prohibited PC in food-contact products. https://www.zhanyict.com/en/ProductsDetail-VB-10475.htmlNowadays PC is only used in a small number of low-cost adult water cups and is an unsafe material being phased out by the market.

PCTG Material

Free of harmful substances such as BPA, BPS and phthalates. It passes food-contact safety certifications including U.S. FDA, EU LFGB and China GB 4806.7. No harmful substances leach out even under high-temperature soaking. https://www.zhanyict.com/en/ProductsDetail-VB-10475.htmlAs the mainstream safe material for transparent water cups at present, it is safe for all groups: pregnant women, infants, the elderly and more.

4. Drop Resistance with Equal Wall Thickness (Factory Actual Test)

Test Conditions: Same cup design with a uniform wall thickness of 2.5mm, injection molded with PC and PCTG respectively. https://www.zhanyict.com/en/ProductsDetail-VB-10475.htmlA 1.2-meter drop test on cement ground simulates daily accidental drops.

- PC Water Cup: Obvious cracks appear on the rim after 3 drops; stress cracking occurs on the cup body, causing seal failure and making it unusable. At -10°C low temperature, it shatters completely after just one drop.

- PCTG Water Cup: No cracks or deformation after 10 consecutive drops, with sealing performance fully intact. Even at -10°C, it remains undamaged after 5 drops, https://www.zhanyict.com/en/ProductsDetail-VB-10475.htmlshowing an overwhelming advantage in toughness.

Test Conclusion: With the same wall thickness, PCTG is 2–3 times more drop-resistant than PC. PC is hard yet brittle, while PCTG is tough and durable — their anti-fall performance differs vastly.

5. Suitable Crowds & Age Groups

PC Material: Strictly prohibited for infants, pregnant women and teenagers. https://www.zhanyict.com/en/ProductsDetail-VB-10475.htmlOnly recommended for adults to hold room-temperature water temporarily; not suitable for long-term use.

PCTG Material: Suitable for all age groups. Especially ideal for children, pregnant women, fitness enthusiasts and daily commuters, https://www.zhanyict.com/en/ProductsDetail-VB-10475.htmlwidely made into sports water cups, kids’ cups and portable travel tumblers.