I. Case Summary

This case successfully demonstrates TA75C-ZZJ Application of TPE/TPU-modified materials in juicer accessories (rubber-coated ABS sealing lid). Initially, the customer encountered challenges when using both conventional TPE and TPU materials: The TPE material TA70C-01 has poor adhesion in the overmolding process, and the TPU material TU7500 is difficult to release from the mold due to sticking. After our company’s technical analysis, we specifically recommend products that feature high liquidity, excellent encapsulation performance, and easy demolding properties. TA75C-ZZJ This material demonstrated outstanding performance in the customer’s second trial, successfully addressing the dual challenge of adhesion strength and moldability in one go. As a result, it gained the customer’s approval and was successfully introduced into production.

 

II. Application Background and Customer Needs

• End product Juicer
• Specific components Rubber-coated ABS sealing lid
• Core features Achieve a sealing effect through encapsulation molding with an ABS matrix, while also ensuring a comfortable tactile feel.
• Customer’s core needs ：
• Excellent encapsulation performance It must be firmly bonded to the ABS substrate.
• Good formability Easy to process via injection molding and provides excellent filling performance.
• Smooth demolding Improve production efficiency and prevent mold sticking.
• Weather resistance Possesses a certain resistance to UV yellowing, helping to maintain the product’s appearance.

III. Material Selection and Development Process

1. First-time recommendation and sample failure (NG) ：
2. Based on the customer’s general requirements for rubber-coated ABS, our company has initially recommended two solutions:
3. Option 1: TPE material TA70C-01
4. Test result: NG ： The rubber coating effect is poor, and the bond is not firm. It cannot meet the core requirement of bonding strength for seals.
5. Option 2: TPU material TU7500
6. Test result: NG ： The molding effect is unsatisfactory, and mold sticking has occurred. This leads to difficulties in demolding, seriously affecting production efficiency and the yield of good-quality products.
7. The core issue The initial test sample revealed that the material in... Bonding strength With Processability A dilemma that cannot be balanced.
8. Technical Analysis and Secondary Recommendation (OK) ：
9. In response to the clear issues identified in the initial trial samples, our technical team conducted an in-depth analysis and determined that we need a product that can... High adhesive strength and Excellent processing and demolding performance A specialized material that strikes a perfect balance between the two.
10. Solution Recommended improved TPE/TPU modified materials  TA75C-ZZJ。
11. Reason for recommendation This material is specifically designed to address such conflicting demands:
12. For   TA70C-01 “Poor Rubber Adhesion”   The molecular structure and polarity have been optimized, significantly enhancing the interfacial adhesion with ABS.
13. For   TU7500 “Mold Adhesion”   While maintaining excellent mechanical properties, the material’s flowability and demolding performance have been enhanced, fundamentally eliminating the issue of mold sticking.
14. Final validation ：
15. Customer use  TA75C-ZZJ  The trial mold was conducted successfully, with a smooth molding process, firm encapsulation, and easy demolding. Successfully resolved all the issues with the first two materials. , Test results   OK 。

IV. Material Comparison and Successful Solutions

The following table compares key parameters for TA75C— ZZJ Optimization directions and comprehensive advantages.

Comparative analysis ：

• Compared to TA70C-01 TA75C- ZZJ At the critical moment Tensile strength, tear strength, and elongation at break Both showed stable and significant improvements, directly addressing the “poor adhesion of the rubber coating” issue caused by the relatively weak mechanical properties of TA70C-01.
• Compared to the TU7500 Although the TU7500 boasts excellent mechanical properties, its TPU characteristics make it prone to “sticking to the mold” during processing. TA75C- ZZJ By means of an optimized formulation, while maintaining sufficient mechanical properties (ranging between TA70C-01 and TU7500), Significantly improved demolding performance. and maintained a lower specific gravity, achieving a balance between cost and performance.
• Core Advantages ：TA75C-ZZJ Provides clearly optimized processing parameters, which... High liquidity With Excellent demolding performance It is the key to simultaneously overcoming the pain points of the first two materials.

V. Case Summary and Value

• Key to Success ：TA75C-ZZJ The material precisely addresses two major pain points from the earlier development phase: it not only compensates for the insufficient bonding strength and mechanical performance of the general-purpose TPE (TA70C-01), but also, through formulation design, avoids the defect of TPU (TU7500) being prone to sticking to molds during processing, thereby achieving— Clinging properties, mechanical properties, processability The perfect balance of the three.
• Customer Value ：
  • Improve production efficiency Fast molding, non-stick mold—significantly shortens the production cycle and improves yield.
  • Ensure product quality Reliable encapsulation and comprehensive mechanical properties ensure the functionality and long-term durability of the seal.
  • Optimize total cost While meeting product requirements, it offers a more cost-effective alternative compared to some TPU solutions.
• Material positioning This case confirms that... TA75C-ZZJ It is an ideal material specially developed for high-demand overmolding applications (such as home appliances and consumer electronics), offering the optimal balance between “overmolding adhesion” and “processability.”