As a professional one-stop supplier focusing on PET (Polyethylene Terephthalate) for water bottles and HDPE (High-Density Polyethylene) for bottle caps, we deeply understand the core demands of PET bottle and preform producers. Whether you are a factory with many years of experience in this industry or a factory about to start production, we can provide you with all the raw materials you need. If you have specific brands and grades in mind, please let us know. We have established long-term partnerships with many well-known brands, ensuring a stable supply and competitive prices. If you are new to the industry, please tell us your needs, and our professional team can recommend the most cost-effective PET and HDPE for you.
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Water Bottle Grade PET Resin We Supply
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HDPE Resin for Bottle Caps & Closures
| Grades | MI | Manufacturers |
| MB5568 | 0.8 | Borouge |
| MB5569 | 0.8 | Borouge |
| MB7581 | 4 | Borouge |
| HD1010J | 20 | InnoPlus |
| HD2200JP | 3.5 | InnoPlus |
| HD6070EA-B | 7.6 | ELTEX® |
| SuperstressTM CAP311 | 4 | ELTEX® |
| CL9010 | 1.0 | Lotte |
| CC027C | 0.8 | Sabic |
| HMA035 | 8.0 | ExxonMobil |
| 9012 | 11.5 | Marlex |
| 9012C | 11.5 | Marlex |
| 9018 | 20 | Marlex |
| DMDA 8008 | 7.5 | Sinopec |
| ME8000 | 8 | LG |
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Why Choose PET Resin for Water Bottles？
Exceptional transparency and gloss. With over 90% light transmittance, it is as clear as glass, directly showcasing the purity of the water and enhancing product appeal. This is a quality unmatched by resins like HDPE and PP.
Excellent strength-to-weight ratio. Tensile strength of PET chips can reache 55-75 MPa, while being 70% lighter than glass. This ensures the bottle is resistant to deformation and breakage, while reducing transportation costs and carbon emissions, making it suitable for large-scale bottled water production. Â
Excellent barrier properties. Effectively blocks harmful gases such as oxygen and water vapor, preventing external contamination while preventing water evaporation, maintaining the freshness and neutral taste of the water for a long time.
Food-grade safety and compliance. Meets stringent global food safety standards such as FDA, EU 10/2011, and GB 4806.6, with no harmful substance migration, ensuring safe drinking water.
Good processing performance. Adaptable to high-speed stretch blow molding processes, enabling rapid prototyping of various bottle sizes and shapes from 0.2L to 2L. Meanwhile, the uniform wall thickness and minimal waste generated during processing significantly improve production efficiency.
Recyclability. PET resin is a No. 1 recyclable resin and can be processed into recycled PET (rPET), aligning with environmentally conscious consumer trends.
What are the main indicators to be considered when choosing PET resin for Water Bottles?
Intrinsic Viscosity (IV). This is a core indicator determining the strength and toughness of the bottle. The ideal intrinsic viscosity for mineral water bottles is typically IV 0.8 ± 0.02 dL/g. Too low an intrinsic viscosity will result in insufficient bottle strength, while too high an intrinsic viscosity will increase processing difficulty and cost.
Acetaldehyde (AA) Content. Acetaldehyde is a byproduct of PET processing. Excessive acetaldehyde will give water an unpleasant odor and affect its taste. For high-end bottled water brands, PET resin with an acetaldehyde content of <1 ppm must be selected to ensure the water’s taste.
Moisture Content. PET is very sensitive to moisture. If the moisture content exceeds 0.05% before processing, hydrolysis will occur, leading to defects such as bottle cracking and reduced transparency. Therefore, the selected PET resin must have strictly controlled moisture content, and pre-drying treatment is required before processing.
Impurity Content. The high-purity PET resin we supply has extremely low impurity content, ensuring bottle transparency and avoiding defects.
Why Choose HDPE for the production of bottle caps & Closures ?
Excellent sealing performance. HDPE possesses moderate flexibility and elasticity, allowing it to fit tightly against the bottle neck threads, effectively preventing leakage and the entry of external air and contaminants, ensuring long-term water quality safety.
Superior toughness and durability. It has excellent rigidity and impact resistance, withstanding repeated opening and closing and rough handling during transportation. Even in extreme temperatures ranging from -100℃ to 120℃, it is not prone to cracking or deformation, resulting in a long service life.
Excellent chemical resistance. It is chemically inert, resistant to acids, alkalis, detergents, and other substances, making it suitable for frequent sterilization of reusable water bottles. It will not react with water or detergents, nor will it release harmful substances.
Easy processing and efficient mass production. It is compatible with the core process of bottle cap production—high-speed injection molding. Its good flowability allows for rapid mold filling and precise thread forming. Furthermore, its production efficiency can reach 1200 pieces per minute with a low scrap rate.
High cost-effectiveness. The unit cost is lower than resins such as PET. Combined with its excellent processing performance, it can significantly reduce the raw material and total production costs of bottle caps, making it suitable for large-scale production.
Food-grade safety and environmentally friendly. Naturally BPA-free, meeting food safety standards such as FDA, EU 10/2011, and GB 4806.7. It belongs to No. 2 recyclable resin, meeting environmental protection requirements and brand sustainability.
What are the main indicators to be considered when choosing HDPE resin Bottle Caps Grade?
Melt Flow Rate (MFI). MFI determines the flowability of HDPE during injection molding. For bottle caps, the ideal MFI is 2-20 g/10min (190°C, 2.16 kg). HDPE with an MFI of 8-20 g/10min is suitable for high-speed injection molding of small, thin-walled bottle caps, such as 0.5L caps. HDPE with an MFI of 2-8 g/10min is suitable for thicker, more durable bottle caps, such as 5-gallon water bottle caps.
Density. The density range of HDPE is 0.940-0.965 g/cm³. For bottle caps, a density of 0.945-0.955 g/cm³ is recommended. This density provides a balance between rigidity and flexibility, ensuring sealing performance and durability. Higher density HDPE has better rigidity but less flexibility, while lower density HDPE has better flexibility but less rigidity.
Environmental stress cracking performance: This is a key indicator for bottle caps as it determines their resistance to cracking during opening and closing. Select HDPE resins with an ESCR (F50, 10% surfactant) ≥ 40 hours to ensure the caps will not crack after repeated use.
Additive compatibility: Bottle caps often require the addition of UV stabilizers for outdoor storage and slip agents to improve processing efficiency. Ensure the selected HDPE resin is compatible with these additives to avoid affecting product performance and am
Why Choose Chemate as Your One-Stop PET & HDPE Resin Supplier?
>> All well-known brands and models for PET Bottles & Bottle Caps
We specialize in providing a full range of bottle-grade PET and HDPE resins, perfectly matching the needs of water bottles, CSD bottles, oil bottles, hot filling bottles and bottle caps production.
>> Uncompromising Quality & Strict Regulatory Compliance
Quality is our top priority. All our PET and HDPE resins undergo rigorous testing, including MFI, IV, AA content, moisture content, ESCR, and impurity detection, to ensure consistency and stability. We strictly comply with global food safety standards and provide complete certification documents.
>> Professional Technical Support for Bottles & Caps Production
We can help clients select the optimal resin grade based on your bottle size, production line speed, and quality requirements, advise on processing parameters  to reduce scrap rates.
>> Streamlined Supply Chain & Stable Logistics
We have established strategic partnerships with top global petrochemical producers, ensuring stable supply even during market volatility. Our global logistics network includes multiple warehouses, enabling just-in-time delivery to reduce your inventory costs. Our supply chain management is inspired by efficient recycling and distribution networks, ensuring timely and reliable delivery.  Â
FAQ About PET/HDPE Resin for Water Bottles Production
1. What happens if I choose the wrong IV value for PET bottle body resin?   Â
Choosing the wrong PET IV value for PET bottles will directly affect product quality and production efficiency. If the IV is too low, the PET resin will have insufficient strength and toughness, leading to PET bottle bodies that are easily deformed, cracked, or broken during transportation and handling. This will increase scrap rates and production costs. If the IV is too high, the PET resin will have poor fluidity, making it difficult to process during stretch blow molding. This will slow down production speed, increase energy consumption, and may cause defects such as uneven wall thickness and poor transparency.
2. Why is HDPE the best choice for water bottle caps instead of PET or PP?
First, HDPE has excellent flexibility and elasticity, ensuring a tight seal with the bottle neck, preventing water leakage and contamination. PET is too rigid and brittle, making it difficult to form a tight seal and prone to cracking when opened. PP has good rigidity but poor low-temperature toughness, making it brittle in cold environments.
Second, HDPE has superior ESCR, able to withstand repeated opening and closing without cracking.
Third, HDPE has excellent chemical resistance, resistant to cleaning agents and other chemicals, making it suitable for reusable bottle caps.
3. How do I select the right MFI grade for HDPE bottle cap resin?  Â
The Melt Flow Index (MFI) of HDPE resin directly affects the injection molding efficiency and quality of bottle caps, so selecting the right MFI grade requires considering your production line speed and cap design.
For small, thin-walled water bottle caps, choose HDPE resin with a higher MFI (8-20 g/10min). Higher MFI means better fluidity, allowing the resin to quickly fill the mold cavity and form precise threads, reducing production time and scrap rates.
For thicker, more durable bottle caps or slower production lines, choose HDPE resin with a lower MFI (2-8 g/10min). Lower MFI provides better rigidity and toughness, ensuring the cap can withstand rough handling and repeated use.
4. Are your PET and HDPE resins compliant with global food safety standards?
Yes, all our PET and HDPE resins are fully compliant with global food safety standards, ensuring the safety of your bottled water products. Our HDPE resins and PET resins comply with FDA 21 CFR 177.1520, EU 10/2011, and GB 4806.7, ensuring they are BPA-free and do not leach harmful substances into water. We regularly conduct third-party testing to ensure our resins meet or exceed global standards, giving you full confidence in product safety.  Â
5. How do you ensure the stability of resin supply, especially during market volatility?
First, we have long-term strategic partnerships with top global petrochemical producers, which ensures we have priority access to raw materials even during periods of shortage. These partnerships are built on years of cooperation, and we have signed long-term supply contracts to lock in supply volumes and prices.
Second, we have established multiple warehouses in key ports in China, stocking large quantities of commonly used PET and HDPE resins to ensure timely delivery.
Third, we have a dedicated supply chain team that monitors global market trends, raw material prices, and production capacity in real time, allowing us to anticipate potential risks and adjust supply plans accordingly.
Additionally, we support flexible order quantities and just-in-time delivery, helping you reduce inventory costs while ensuring you have enough resins to maintain production.