Industry News

On the production floor for TPE material overmolded products, poor adhesion is one of the most common causes of batch scrapping and customer complaints leading to returns.It cascades through five areas—structure, sealing, appearance, durability, and functionality—ultimately turning a TPE material finished product that should have been acceptable into scrap.

Sourcing flexible materials that maintain uniform melt stability without facing polymer migration or structural tearing remains a major hurdle for high-end film extruders. Shenzhenzhongsuwang Plastic Products Co., Ltd. addresses these industrial vulnerabilities with its premium Film Grade TPR. Formulated on a modified SEBS molecular base, this high-purity thermoplastic elastomer combines the physical strength of vulcanized rubber with the streamlined processability of standard plastics.

Sourcing TPE materials today can be simple—or it can be complex. One batch might perform perfectly, while the next could exhibit surface haze, poor overmolding adhesion, or color discrepancies—and the root cause often boils down to the same issue: Is your material actually sourced directly from the original manufacturer, or has it passed through several layers of intermediaries?

If you need an elastomer capable of continuous service at temperatures above 135°C for several years, most TPE will let you down. However, several high-performance grades—including TPEE, TPV, modified SEBS, and specialty alloys—have quietly become the materials of choice in the automotive, electronics, and even aerospace industries. Here’s the reality, along with what each material excels at.

During injection molding or extrusion of TPE, long, thin, silvery-white streaks often appear on the product surface—a phenomenon manufacturers refer to as “silver streaks,” “silver lines,” or “silver threads.” This defect not only affects the product’s appearance but may also indicate material degradation or internal stress concentration, which can compromise the product’s mechanical properties and service life. So, how do manufacturers address this issue?

“FDA compliance” is not a label that can be applied casually, it involves multiple aspects, including regulatory provisions, application suitability, testing and validation, and supply chain transparency. The consequences of selecting the wrong TPE raw material are all too common. So how should one go about making the right choice?