TPU: Thermoplastic polyurethane
You may notice TPU, Thermoplastic polyurethane, in some of our safe swap listings, particularly in waterproof mattress covers. We strive to give readers options and information so you can make the best choices for your family, so let’s talk about TPU.
What is TPU?
TPU is a type of polyurethane plastic that combines the elasticity of rubber with the durability of plastic. It is part of a larger family of thermoplastic elastomers, which are known for their ability to stretch and return to their original shape. TPU is notable for its:
- Flexibility: It can bend without breaking.
- Durability: Resistant to wear, abrasion, and tearing.
- Chemical Resistance: Withstands oils, greases, and many chemicals.
- Customizability: Available in various hardness levels, making it suitable for diverse applications.
TPU is manufactured using a blend of three components:
- A polyol (the soft segment),
- A diisocyanate (the hard segment), and
- A chain extender, which connects the two.
Is TPU Safe and Non-Toxic?
The safety of TPU depends on its composition, manufacturing process, and intended use. Here’s a closer look:
- Chemical Composition and Additives:
- TPU itself is considered relatively safe and inert in its finished form. However, additives such as plasticizers, stabilizers, or dyes used during manufacturing may introduce concerns.
- TPU is free from harmful substances like phthalates and bisphenol A (BPA), common in some other plastics, making it safer for food-grade and medical applications.
- Off-Gassing and Volatile Organic Compounds (VOCs):
- Some TPU products may emit low levels of VOCs, especially when newly manufactured or exposed to high heat. This can be a concern in poorly ventilated areas.
- Reputable manufacturers typically design TPU with minimal emissions, adhering to safety standards such as OEKO-TEX and REACH compliance. We only list products containing TPU that have OEKO-TEX certification to minimize the risk of VOCs.
- Biocompatibility:
- Medical-grade TPU is often used in implants, catheters, and other healthcare products, demonstrating its biocompatibility and low toxicity when properly formulated.
- Environmental Impact:
- TPU is not biodegradable, but it is recyclable. However, its production involves the use of petroleum-based chemicals, raising sustainability concerns.
How to Ensure TPU Safety
If you’re considering products made with TPU, here are some tips to ensure safety:
- Check for Certifications: Look for products certified as non-toxic or food-grade, such as those labeled with FDA, OEKO-TEX, or REACH compliance.
- Avoid Prolonged Heat Exposure: While TPU is heat-resistant, excessive heat can cause it to degrade, potentially releasing trace chemicals.
- Use Reputable Brands: Established manufacturers are more likely to follow stringent safety protocols and avoid harmful additives.
Final Verdict: Is TPU Safe?
Yes, TPU is generally considered safe and non-toxic when used appropriately and manufactured under reputable standards. Its widespread use in medical, consumer, and industrial applications attests to its safety. However, as with any material, the specific formulation and context of use play a significant role in determining its safety.
For environmentally conscious consumers, it’s worth noting that while TPU is not biodegradable, its durability and recyclability can offset some of its environmental impact. When purchasing TPU products, prioritize certified, high-quality options to ensure they meet safety standards.
TPU’s combination of flexibility, durability, and safety makes it an excellent choice for a wide range of applications, provided that it is sourced and used responsibly. Whether you’re buying a phone case, a child’s toy, or a pair of running shoes, knowing more about TPU can help you make informed, safe, and sustainable decisions.