What exactly makes liquid silicone so appealing?

分类: Industry News

2022-01-14

Liquid silicone rubber, abbreviated as LSR in English, is used to manufacture silicone products such as silicone nipples and baby bottles, phone cases, and gas‑tight respirators—some of the most popular and best‑selling LSR items. LSR is highly favored by both consumers and manufacturers; so what exactly makes it so appealing?
1. Excellent flowability, rapid vulcanization, and fast molding speed.
2. Excellent resistance to yellowing and superior heat‑aging resistance,
When silicone rubber vulcanizates are left in their free state and exposed to outdoor sunlight for several years, their properties show no noticeable changes.
3. Excellent electrical insulation properties,
The electrical insulation properties of vulcanized silicone rubber exhibit only minor changes when exposed to moisture or water, or under elevated temperatures. Upon combustion, it forms silicon dioxide, yet remains an insulator, thereby ensuring that electrical equipment can continue to operate until maintenance is performed.
4. Safety and Environmental Protection
The product complies with environmental regulations such as RoHS, is certified by the U.S. FDA for safety and environmental friendliness, and fully meets food-grade standards. It is odorless, non‑toxic, physiologically inert, and poses no adverse health effects to humans.
5. High and low temperature resistance
Liquid silicone rubber is a heat‑resistant material that, among various types of silicone rubber, retains its elastomeric properties even after exposure to temperatures as high as 250°C.
6. High air permeability
Its gas permeability is tens to even hundreds of times higher than that of conventional silicone rubber, and it exhibits significant differences in permeability among various gases.
7. Excellent mold resistance,
Silicone rubber can be stored for long periods, with a water absorption rate of less than 0.015%, and it does not promote the growth of algae or mold, so it will not mildew.

Previous:

What are the six key factors in silicone rubber compression molding and vulcanization?

Next:

How to choose the right silicone vulcanizing agent?

Related Articles

Precipitated silica is a high-tech inorganic fine chemical product.

White carbon black, also known as silica, is scientifically termed precipitated hydrated silica. It is a high‑tech inorganic fine chemical product whose main constituent is SiO₂. Its physical properties resemble those of carbon black, appearing as a highly dispersed white amorphous powder or flocculent powder; it is also processed into granular forms for commercial use. Lightweight, with an original particle size below 0.3 μm and a relative density ranging from 2.319 to 2.653, it has a melting point of 1750°C. It is insoluble in water and most acids, but absorbs moisture from the air, forming hygroscopic fine particles. It is soluble in caustic soda and hydrofluoric acid, while remaining inert to other chemicals; it does not decompose at high temperatures nor does it burn. It is chemically inert toward substrates, active ingredients, and additives, and exhibits excellent compatibility with many active components commonly used in vitamins, hormones, fluorides, antibiotics, enzyme preparations, and cosmetics. It possesses high electrical insulation properties. Owing to its porosity and large specific surface area, it demonstrates strong dispersibility in raw rubber and imparts superior reinforcing performance in rubber compounds. Surface‑modified hydrophobic silica readily disperses in oils, rubbers, and plastics as a reinforcing filler, significantly enhancing mechanical strength and tear resistance. Due to variations in manufacturing processes, the physical and chemical characteristics, as well as the microstructure, of silica may differ, leading to distinct application areas and performance outcomes.

2022-02-19

Do you know the types and properties of silicon dioxide?

The reinforcing fillers used in silicone rubber are primarily synthetic silica, also known as precipitated silica. Precipitated silica is classified into fumed silica and precipitated silica.

2022-02-19

What method is used for the high-temperature surface treatment of precipitated silica?

Surface high‑temperature treatment involves subjecting precipitated silica to elevated temperatures to remove adsorbed molecules—such as water and other low‑molecular‑weight species—from its surface. While this approach can modestly improve certain vulcanization properties, the effect is not particularly pronounced. Surface chemical treatment, on the other hand, entails reacting the active silanol groups on the silica surface with specific chemical reagents, thereby enhancing the compatibility and reactive activity of the silica with polymeric matrices. A wide variety of reagents can be employed for such chemical modification, and numerous methods exist; a substantial body of literature and patents addresses these approaches. The following provides a brief overview of some key aspects.

2022-02-19

Challenges Facing the Future Development of the International Rubber Industry

On May 26, the 18th Shanghai Derivatives Market Forum, hosted by the Shanghai Futures Exchange, opened at the Shanghai Futures Building. At the forum’s rubber-themed roundtable held that afternoon, participants engaged in an in-depth discussion on several challenges currently facing the international rubber market.

2022-02-19

The 2021 recovery in global rubber demand is expected to fall short of expectations.

Salvatore Pinizzotto, Secretary-General of the International Rubber Study Group (IRSG), stated that although demand for rubber in Asia, particularly in China, is growing robustly, the recovery of global rubber market demand in 2021 is expected to fall short of expectations, given the potential delay in the large-scale rollout of vaccines.

2022-02-19

Is the day of Black’s rise also the day of rubber’s plunge?

Currently, policy measures are clearly weighing on commodity markets, with black metals showing the most pronounced weakness; prices in this sector have already fallen by more than 20% from their peak. Some individual commodities are beginning to show signs of stabilization.

2022-02-19

Contact phone number:

020-36896519

Company email:

1541901416@qq.com

Huadu Company Address:

1st Floor, Building A2, Zone A, Meiwang Science and Technology Park, Guangzhou Airport Economic Zone (No. 6, Guangtang South Street, Xinya Subdistrict, Huadu District)

Zhaoqing Factory Address:

No. 33-3, Xin’an Avenue, Zhaoqing New District, Dinghu District, Zhaoqing City

Leave us a message

If you are interested in our products, please leave your contact information, and we will get in touch with you as soon as possible. Thank you!

Submit Now
%{tishi_zhanwei}%

Technical Support: Zhongqi Cross-border, Guangzhou

Leave us a message.

We consistently uphold a business philosophy of win-win cooperation, and look forward to advancing hand in hand with you, achieving mutual benefits and shared success, and creating brilliance together!

Submit Message

*Note: Please ensure that all information provided is accurate and keep your contact details up to date. We will get in touch with you as soon as possible.