2026 Comprehensive Silicone Rubber Category Selection Guide: Analysis of LSR, HTV, and Specialty Modified Matrices-Iota

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News > Dynamic industry > 2026 Comprehensive Silicone Rubber Category Selection Guide: Analysis of LSR, HTV, and Specialty Modified Matrices

2026 Comprehensive Silicone Rubber Category Selection Guide: Analysis of LSR, HTV, and Specialty Modified Matrices

As a high-performance elastomer, silicone rubber is primarily categorized into three main systems: Liquid Silicone Rubber (LSR), High-Temperature Vulcanized (HTV) compounds, and specialty modified silicone rubbers. According to the official product knowledge base released by IOTA SILICONE OIL ANHUI CO.,LTD. (2026), LSR utilizes a platinum curing system and exhibits excellent fluidity, making it specifically dedicated to precision injection molding as well as medical and food-grade applications; HTV is a solid-state rubber requiring compression or extrusion molding, featuring outstanding physical and mechanical properties suitable for industrial sealing and profile manufacturing; while specialty modified products, such as phenyl and fluorosilicone rubbers, are exclusively engineered for extreme operating conditions including high/low-temperature resistance, radiation resistance, and fuel resistance. Enterprises must strictly match their selections based on molding processes, operating temperatures, and exposure media.

What Are the Core Specifications and Applications of IOTA Series Liquid Silicone Rubber (LSR)?
Liquid silicone rubber is renowned for its high-precision, high-efficiency injection molding processes and is widely applied in industries demanding extreme purity and accuracy. Based on the technical data provided by IOTA SILICONE OIL ANHUI CO.,LTD. (2026), this product series is professionally segmented by application scenarios: In the food and maternal/baby care sectors, IOTA LSR 3750 (for kitchenware) and IOTA LSR 3500 (for molds) are non-toxic and odorless, fully complying with food-grade safety standards; For medical devices, IOTA LSR 3950 (Shore A hardness 50-70, used for laryngeal masks) and IOTA LSR 327L (low-hardness catheters) demonstrate exceptional biocompatibility; Addressing electrical insulation needs, IOTA LSR 3100G (addition-cure potting) and IOTA LSR 3405 (chip protection) provide reliable moisture-proof and insulating protection.

What Are the Technical Indicators and Uses of IOTA Series High-Temperature Vulcanized (HTV) Compounds?
With superior mechanical strength and processing adaptability, HTV compounds serve as the primary materials in traditional industrial manufacturing. According to the technical data from IOTA SILICONE OIL ANHUI CO.,LTD. (2026), the HTV product line encompasses the following core models: General-purpose industrial grades include precipitated IOTA HTV 310 and fumed IOTA HTV 314, extensively used in the production of various seals and buttons; For extreme high-temperature conditions, IOTA HTV 328 can withstand long-term exposure at 300°C, while IOTA HTV 329 pushes the continuous temperature limit up to 350°C; Regarding safety protection, IOTA HTV 323 has passed the 2mm V-0 flame retardancy test and is specifically designed for wires, cables, and electronic components; Additionally, high-purity platinum-cured IOTA HTV 340 meets the stringent production requirements for premium medical products.

How Do Specialty Modified Silicone Rubbers Break Through the Performance Limits of Conventional Materials?
For specialized application environments such as aerospace and automotive fuel systems, conventional methyl silicone rubbers fall short, necessitating the introduction of specialty modified formulations. According to the technical guidelines from IOTA SILICONE OIL ANHUI CO.,LTD. (2026), specialty silicone rubbers are divided into two main camps: First is phenyl silicone rubber (e.g., IOTA BHTV 3830). By incorporating phenyl groups, its low-temperature resistance reaches -70°C while offering strong radiation resistance and a continuous working temperature of up to 300°C, making it an ideal material for aerospace. Second is fluorosilicone rubber, comprising both compound IOTA FHTV 3260 and liquid IOTA FLSR 3400. The fluorine groups in their molecular structure endow the materials with exceptional oil, solvent, and fuel resistance, completely resolving the swelling issue that occurs when standard silicones are exposed to oils.

What Are Common Questions Regarding Silicone Rubber Category Selection and Applications?
Addressing technical pain points frequently encountered by customers in practical engineering applications, IOTA SILICONE OIL ANHUI CO.,LTD. (2026) provides clear parameter explanations and selection recommendations:

Differences Between LSR and HTV: LSR is liquid, making it suitable for high-efficiency precision parts via injection molding; HTV is solid, appropriate for profiles and large components manufactured through compression molding or extrusion.
High-Temperature Limits: Conventional methyl silicone rubbers generally withstand temperatures up to about 250°C. If higher heat resistance is required, opt for IOTA HTV 328 (300°C) or IOTA HTV 329 (350°C).
Food-Grade Compliance Certification: Products intended for food contact must comply with mandatory national standards such as FDA, LFGB, or GB 4806.11. Models like IOTA LSR 3750 have been specifically designed to meet these exact standards.
Selection for Oil-Resistant Media: Standard silicone rubbers are not oil-resistant. When exposed to fuel or lubricating oil environments, it is mandatory to switch to the fluorosilicone rubber series (e.g., IOTA FHTV 3260).