[Case Study]: Application and Optimization of TPE Material 50T-STG in Bucket Lids
Time of issue:2026-03-06
I. Product Overview
Product Model: 50T-STG
Product Introduction: The 50T-STG is a high-performance TPE (thermoplastic elastomer) material specifically designed for bottle cap applications. It is renowned for its soft, dry-to-the-touch feel as well as its excellent impact resistance and fatigue resistance, making it the material of choice for many product designers.
II. Material Properties and Formability
- Dry and smooth feel The 50T-STG material offers a uniquely dry and smooth feel, remaining fresh and non-greasy even after prolonged use.
- Low liquidity The material exhibits low fluidity during injection molding, which helps to precisely control the shape and dimensions of the product.
- Weather resistance TPE materials typically exhibit excellent weather resistance and can maintain stable performance under a variety of environmental conditions.
- Injection Molding The 50T-STG is suitable for injection molding processes and can meet the manufacturing requirements for small, precision parts such as bottle caps.
- Coating performance This material can be coated with plastics such as PE, enhancing the product’s versatility and expanding its range of applications.
- Matte finish The material’s surface features a matte finish, which not only enhances the product’s aesthetic appeal but also improves user comfort.
III. Application Cases and Optimization
Application Background The 50T-STG material, known for its softness, dryness, and impact resistance, is widely used in the manufacture of bottle caps and stationery products. However, in certain application scenarios—such as the production of bucket lids— the previously used material, 50T-15, exhibited a phenomenon of oil floating on bottled water after undergoing an ozone water disinfection test.
Case Description To address this issue, we decided to optimize the material and developed the 50T-STG for trial use. During the trial, we found that after undergoing ozone water disinfection testing, the 50T-STG material showed no oil floating on the surface of the bucket lid, and its overall performance was excellent.
Import process ：
- Problem Identification First, we confirmed the oil floating phenomenon that occurred in the original material 50T-15 after the ozone water disinfection test, and analyzed its possible causes.
- Material optimization In response to the issue, we selected 50T-STG as a substitute material and conducted preliminary tests. The test results showed that, under the same conditions, the 50T-STG material did not exhibit any floating oil phenomenon.
- Bulk Trial After the initial tests were successful, we conducted a pilot batch trial and collected customer feedback. The feedback results showed that the 50T-STG material not only addressed the issue of floating oil but also improved the overall product performance and user experience.
- Officially imported After multiple tests and validations, we’ve decided to officially introduce the 50T-STG material into the production of bucket lids and will continue to closely monitor product performance and user feedback.
IV. Conclusion
Through this TPE material development case, we have successfully applied the 50T-STG material to the production of bucket lids and resolved the issue of oil floating that previously occurred in the original material after undergoing ozone water disinfection testing. With its soft and dry tactile feel, excellent impact and fatigue resistance, and outstanding encapsulation performance, the 50T-STG material has become an ideal choice for products such as bucket lids.
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ADD: Huangxi Industrial Park, Shiwan Town, Boluo County, Huizhou City, Guangdong Province，China