China's First Breakthrough! LongSun HTPVSI Silicone-Based Elastomer Ends Overseas Technological Monopoly
2025-09-23
HTPVSI elastomer is a new type of material that combines the elasticity of rubber with the processing convenience of plastic. Independently developed by Dongguan LongSun Material Technology Co., Ltd., it has broken the long-term monopoly of foreign enterprises in the field of high-end silicone-based elastomers, marking a historic breakthrough for domestic high-performance elastomers from "non-existence" to "existence".
I. Core Characteristics: The Material Advantage of Combining Rigidity and Flexibility
Through a special dynamic vulcanization process, LongSun's HTPVSI perfectly integrates the elasticity of silicone rubber and the processability of thermoplastic plastics, forming unique performance advantages. It is as elastic as rubber, capable of quickly rebounding after stretching. Its compression set at 23°C is only 16%, ensuring it does not loosen or deform easily even after long-term use. With a tensile strength of up to 26.4 MPa, it far outperforms ordinary elastomers. Meanwhile, it retains the processing convenience of plastic, enabling rapid molding through processes such as injection molding and extrusion. Products with complex structures can be formed in one go, and leftover materials can be recycled and reused, meeting the requirements of green environmental protection.
This material also boasts exceptional environmental adaptability, maintaining stable performance within a wide temperature range from -60°C to 200°C. It does not harden or crack at sub-zero temperatures in winter, nor does it deform or soften in high-temperature environments in summer. Its surface has a smooth and delicate touch, similar to human skin. Moreover, it can firmly adhere to various common materials such as PC, ABS, and nylon, enabling integrated molding without additional treatment—its compatibility is far superior to that of ordinary materials.
II. Diverse Applications: Penetrating All Aspects of Daily Life and Industry
The characteristics of HTPVSI make it highly versatile across multiple fields. In the smart wearable and consumer electronics sector, it is commonly used in smart watch straps of brands like Huawei and TCL. It is skin-friendly, non-stuffy, and comfortable for long-term wear, while also allowing for diverse appearance effects through two-color injection molding. When used in phone cases, it not only resists scratches and impact but also achieves a permanently dust-free surface, and is lighter than traditional materials.
The automotive and new energy sectors also rely heavily on HTPVSI. Seals for new energy vehicle battery packs made of HTPVSI can withstand high-temperature environments, effectively ensuring battery safety. Seals around engines also leverage its temperature resistance to maintain long-term reliability while reducing the weight of components. In the baby care and medical fields, it fully demonstrates its safety advantages. Products such as baby pacifiers and teething toys made of HTPVSI meet FDA food-grade certification, being non-toxic, harmless, and resistant to biting. Medical consumables like catheters utilize its biocompatibility to reduce usage risks.
III. Market Value: The Economic and Industrial Significance of Domestic Substitution
Before the advent of LongSun's HTPVSI, the domestic high-end silicone-based elastomer market was monopolized by foreign products such as TPSiV from Dow Corning. These imported products were not only expensive but also subject to frequent supply restrictions. Through independent research and development, LongSun has made breakthroughs in core technologies, enabling HTPVSI to reduce the overall cost by 20%-30% compared with imported products while maintaining undiminished performance. Even in key indicators such as tensile strength and temperature resistance, HTPVSI performs even better.
Currently, LongSun's HTPVSI has passed certifications from leading enterprises including Huawei and CATL. Its production capacity reached 700 tons in 2024, and its products are also exported to countries such as Russia. At the policy level, China's "14th Five-Year Plan" for new materials lists high-performance elastomers as a key development direction, providing strong support for the promotion of HTPVSI. This domestic substitution not only reduces production costs for downstream enterprises but also fills the technological gap in domestic high-end elastomers, driving the transformation of China's new material industry from reliance on imports to independent control.
As a result of LongSun's independent innovation, HTPVSI elastomer has proven the competitiveness of domestic materials in the high-end field with its tangible performance and cost advantages. With the continuous expansion of application scenarios, it will undoubtedly play a greater role in industries such as consumer electronics, new energy, and medical care, injecting strong impetus into the upgrading of China's manufacturing industry.
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