Plastic water bottles are one of the most popular types of drinkware. In fact, plastics are also divided into many different types. Among them, Tritan and PP are regarded as relatively high-quality plastics. If you are selecting the right materials for your plastic water bottle product, this article will offer you some references.
Material Composition of Tritan and PP
Tritan
Tritan is a copolyester resin material launched by the American company Eastman Chemical Company in 2007. Tritan is the trade name of this material.
During the production process of Tritan polymer, BPA is not used. The recycling label is Class CP. Different grades of Tritan can meet various requirements, including versions with higher temperature resistance. These properties make Tritan ideal for high-end water bottle manufacturing. If your target market is the high-end segment, Tritan is the top choice.
PP
PP (Polypropylene) is a semi-crystalline thermoplastic that is formed by polymerizing propylene monomers. It is one of the most widely used commercial plastics today. Its density is approximately 0.89–0.92 g/cm³, making it the lightest among all commercial plastics. PP is naturally free of BPA, and its recycling label is PP #5.
PP is the most common and a go-to material for cost-effective water bottle production. If your product aims to enter the market quickly, PP is a good choice.
Properties of Tritan Water Bottles vs PP Water Bottles
Heat Resistance
Tritan Water Bottles
The temperature resistance range of Tritan varies by model. The typical temperature range is approximately -40℉ to 212℉( -40°C to 100°C). Some Tritan water bottles can withstand direct contact with boiling water without deformation or releasing harmful substances.
The glass transition temperature of the Tritan HX100 model can reach up to 120°C. Under different model conditions, Tritan can withstand a maximum temperature of approximately 109°C.
Tips: The glass transition temperature is the point at which a plastic changes from being hard to becoming soft. At low temperatures, it is hard and brittle like glass. As the temperature rises to a certain point, it suddenly becomes soft and elastic.
PP Water Bottles
The heat resistance of PP is superior to that of Tritan, reaching up to 160–170°C. PP water cups can withstand liquid at about 130°C and can be subjected to boiling water filling and steam sterilization.
PP is the only common plastic that can be directly placed in a microwave oven (make sure the product indicates microwave compatibility). PP will become brittle at temperatures below 0°C and has lower low-temperature toughness compared to Tritan.
Transparency and Visual Effect
Tritan Water Bottles
Tritan has extremely high optical transparency, approaching that of glass. Its light transmittance is approximately 92%. Tritan water bottles do not yellow easily over time, maintaining a long-lasting visual effect.
For those applications where the appearance of liquids needs to be displayed, we recommend that you choose Tritan water bottles.
PP Water Bottles
The transparency of PP is significantly lower than that of Tritan, presenting a mostly translucent or opaque milky white appearance. After long-term use, PP water bottles may become more cloudy.
Durability and Impact Resistance
Tritan Water Bottles
Tritan has extremely excellent impact resistance. When dropped, Tritan water cups are less likely to crack or break, making them safer than glass. Moreover, Tritan is harder than PP, and the surface of the water cups is less prone to scratches. If your target customers place great importance on the durability of plastic water bottles, then you can choose Tritan.
PP Water Bottles
PP has good toughness. When a PP water bottle drops, it absorbs the impact by deforming rather than shattering, so its shock resistance is also good. The bending fatigue resistance of PP is also very good. It is very suitable for water bottles that require squeezing, such as cycling water bottles.
However, it is not as durable as Tritan and is prone to being scratched.
Corrosion Resistance and Odor Resistance
Tritan Water Bottles
Tritan has excellent resistance to acids and alkalis, and is not easily corroded by acidic drinks such as juice and coffee. Tritan water bottles also do not retain any unpleasant odors easily. So Tritan water bottles are easy to clean.
PP Water Bottles
PP also has good chemical stability and does not react with most acids, bases, or organic solvents. It is also not prone to releasing harmful substances. However, PP has certain permeability to oils. After long-term use, PP water cups are more likely to absorb odor and oil stains.
Safety
Tritan Water Bottles
Tritan does not contain BPA, BPS, or any other bisphenol substances. It also does not contain phthalates. Tritan has obtained food safety certifications from multiple countries and regions, such as the US FDA (Food Contact Notification FCN No. 729), European EFSA, etc. And Tritan is the designated material for infant products in Europe and the United States. Tritan water bottles are suitable for kids’ use.
PP Water Bottles
PP also does not contain BPA. The FDA food contact certification standard is 21 CFR 177.1520, which complies with international food contact material regulations. However, PP is prone to brittleness and discoloration when exposed to ultraviolet rays. When PP water bottles are exposed to the outdoors for a long time, UV stabilizers need to be added.
PP is widely used in the manufacture of daily food-contact products, such as plastic water bottles and food containers. For water bottles, PP is a mature and safe choice. But you should know, it is less popular in the BPA-free promotion campaign compared to Tritan.
Applications of Tritan and PP Water Bottles
Tritan Water Bottles Applications
With its advantages of high transparency, shock resistance, durability, and no toxicity, Tritan has become the top choice for mid-to-high-end products in the water bottle industry. Here are some applications of Tritan water bottles for your reference.
| Applications | Recommend Reason |
| Sports Water Bottles | Durable and shock-resistant, lightweight and portable |
| Feeding Bottles / Kids Bottles / Sippy cups | BPA-free and do not contain any bisphenol-related substances, high safety |
| High-end Beverage Containers | High transparency enables a good display of liquids |
| Household Plastic Containers | Excellent resistance to acids and alkalis, can be used to hold various things such as juice, salt |
| Medical supplies and personal care products | The chemical properties are relatively stable, and it is not prone to reacting with the internal substances. |
| Protein shaker bottle | Resistant to odors and stains, and no protein odor remains after multiple uses. |
PP Water Bottles
With its cost efficiency and mature technology advantages, PP has been widely applied in the water cup industry. It is suitable for large-scale entry-level and functional product lines. Here are some applications for your reference.
| Applications | Recommend Reason |
| Dining hall / Promotional gifts | Economical and practical |
| Sports water bottles / Travel coffee mugs | Lightweight and heat-resistant, it can be put in the dishwasher |
| Microwave oven-compatible cup | PP can withstand microwave heating and is not prone to deformation. |
| Water cup lid and accessories | Resistant to heat and chemicals, and affordable, suitable for flip covers and sealing ring components of injection-molded structures |
| Barreled water | Relatively low cost, safe ingredients, and enough durability |
Trend of combined usage
You can also choose a typical application strategy, which is to use Tritan bottles with PP caps. Tritan offers high transparency, premium appearance, and shock resistance. While PP provides excellent molding properties, dimensional stability, and cost-effective solutions for components such as caps.
Cost of Tritan and PP Water Bottles
The Tritan material is exclusively manufactured and supplied by Eastman. It is made from high-performance copolyester resin. With a single supplier and high technical barriers, the cost of Tritan is much higher than that of PP.
PP is a common plastic with a huge global production capacity. The raw material cost is stable, and the price is reasonable. The PP water bottle is an extremely cost-effective option and is widely used in entry-level products.
FAQ
How to Choose the Capacity of a Plastic Water Bottle?
The selection of the capacity of a plastic water bottle mainly depends on the applications.
If your product is mainly used for daily commuting and office purposes, a capacity of 400-600 ml would be suitable. It can be placed in the side pocket of a backpack. If your product is a sports water bottle or is intended for outdoor use, a capacity of 700-1000 ml would be suitable, as it can meet the significant water replenishment needs.
How Difficult Is it to Print and Customize the OEM Logos for Tritan Water Bottles and PP Water Bottles?
Both materials support various customization processes like screen printing, heat transfer printing, and laser engraving.
The Tritan water bottle is particularly suitable for high-precision screen printing and holographic pattern effects. It can easily achieve complex decorations such as transparency, metallic effect, or gradient colors. It is suitable for high-end limited edition products that can be associated with fashion brands.
When PP water bottles are injection molded, the color adjustment is highly flexible. Colorants can be directly added to achieve a translucent or customized color appearance.
What Are the Differences in Environmental Protection Between Tritan Water Bottles and PP Water Bottles?
The materials of the Tritan Water Bottle employ a chemical recycling process to transform Tritan waste into brand-new Tritan raw materials. The recycled content can reach up to 50%. The performance of this material is the same as that of the original Tritan, and it has received internationally recognized sustainability certification.
PP can be 100% recycled and reused, and its production process has relatively low energy consumption. However, its recycling channels and reutilization rates are limited. Additionally, PP tends to change color if exposed to sunlight or used for a long period; this may lower the value for recycled PP.
How Long Is the Lifespan of the Tritan Water Bottle?
With proper use and maintenance, the Tritan water bottle can typically be used for 1 to 3 years. The lifespan of the PP water bottle is usually within the range of 1 to 2 years, but its performance retention under frequent dishwasher cleaning is lower than that of Tritan.
What Food Contact Certifications Are Required for Plastic Water Bottles to be Exported to Europe and the United States?
The plastic water bottles exported to the markets in Europe and America must meet the compliance requirements of both the FDA and the LFGB/EU food contact standards. The German market has even stricter requirements for LFGB certification. It not only includes migration tests, but also requires passing sensory tests and detecting the content of specific heavy metals.
Tritan material has already passed the strict certifications of the FDA and LFGB, ensuring it is a safe and healthy material choice. PP water bottles are also a mature food-grade option and have been certified by the FDA and LFGB.
What Are the Points that Need Special Attention for the Tritan Children’s Water Cup?
In the American market, attention is paid to physical security. Children’s water cups should not have sharp parts or sharp edges.
The European Union has set strict safety standards for drinking equipment for children aged 0 to 48 months, including their structure (such as anti-asphyxiation valves) and performance. For detailed information, please refer to EN 14350:2020+A1:2023.
Final Thoughts
If you haven’t chosen your preferred materials yet, it would be better to contact a reliable partner first. Kreat is a professional water bottle factory in China. We have more than 15 years of production experience. We will offer you professional advice, stable quality, and OEM services. Click to contact us.
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