How sulfur free vulcanization technology improves rubber stability

In the field of rubber products, stability is one of the key indicators for measuring product performance. Although traditional vulcanization processes can give rubber a certain strength, they often come with problems such as odor release and susceptibility to aging. The sulfur free vulcanization technology reconstructs the rubber structure at the molecular level through innovative formulas and processes, significantly improving the weather resistance, elasticity, and environmental performance of rubber.

User core needs and problem solving

As a purchaser of rubber products, do you face the following difficulties?

Scenarios that are sensitive to odors are limited: places such as children's playgrounds and indoor gyms have zero tolerance for odors, and traditional vulcanized rubber granules release pungent odors due to sulfur content, affecting user experience.

Insufficient durability: Outdoor runways, landscape paving, and other scenarios require long-term exposure to ultraviolet radiation, rainwater, and temperature changes. Ordinary rubber is prone to cracking and fading, and maintenance costs are high.

Environmental and safety risks: Sulfur containing rubber may release harmful substances that do not meet food grade or child exposure safety standards, limiting its application scenarios.

Customization requirements are difficult to meet: projects require specific colors, particle sizes, or elasticity parameters, and traditional suppliers cannot respond flexibly.

Sulfur free EPDM rubber granules solve the above problems through sulfur free vulcanization technology, providing users with a solution of "zero odor, ultra durability, high safety, and strong customization".

How does sulfur free vulcanization improve rubber stability?

1. Molecular structure optimization: eliminate odors from the root

Traditional sulfurization relies on sulfur cross-linking, which easily decomposes at high temperatures to produce sulfuric acid and sulfide gases. The sulfur free technology adopts a peroxide or metal oxide cross-linking system, which forms stable C-C bonds through free radical reactions, completely eliminating the participation of sulfur components in the reaction. Even if exposed to high temperatures (such as summer ground temperatures exceeding 60 ℃) or strong ultraviolet environments for a long time, it will not release irritating odors, ensuring safe and worry free indoor and outdoor scenes.

2. Durability improvement: life extended by more than 3 times

The molecular network formed by sulfur free crosslinking is denser, with a 2-3 fold increase in tear strength (up to 4-7 megapascals), and significantly better tensile performance than traditional vulcanized rubber. Experimental data shows that in accelerated testing simulating 5-year outdoor aging, the elasticity loss rate of sulfur free EPDM granules is less than 10%, while traditional products can reach over 50%. This feature makes it an ideal choice for high traffic areas such as school playgrounds and commercial plazas.

3. Anti aging and anti-oxidation: color lasts as long as new

Sulfur free technology inhibits the generation of sulfur free radicals, blocks oxidative chain reactions, and significantly delays rubber aging. Combined with high-purity EPDM raw materials and antioxidant additives, the particle color retention rate is increased by 5 times. Even if exposed to ultraviolet light for a long time, it can still maintain a bright color and reduce the frequency of refurbishment.

4. Environmental Protection and Safety: Passed Food Grade Certification

The sulfur free formula does not contain harmful substances such as heavy metals and polycyclic aromatic hydrocarbons (PAHs), and can be directly used in high safety scenarios such as kindergartens and parent-child playgrounds.

5. Physical performance optimization: low density and strong stereoscopic effect

By adjusting the production process, the sulfur free EPDM particle packing density is reduced by 15%, the three-dimensional effect of water chestnuts is stronger, the surface is smoother after paving, and the drainage performance is improved by 20%, effectively reducing the risk of slipping.

Application scenarios and user value

Sports field: The high elasticity of sulfur free granules can cushion the impact of sports, reduce the risk of athlete injury, and meet the air quality requirements of indoor sports venues with zero odor characteristics.

Children's play area: Food grade safety standards and UV resistance ensure that children have no health hazards from long-term exposure, and parents can rest assured.

Landscape paving: The persistence of colors ensures a long-lasting design effect, reduces maintenance costs, and enhances the overall cost-effectiveness of the project.

Industrial applications: Its high temperature resistance (able to withstand temperature differences of -40 ℃ to 120 ℃) makes it suitable for sealing components, shock absorbers, and other scenarios in extreme environments.

Why choose us?

25 years of deep industry cultivation: from raw material formula to production process, the entire process is independently controllable to ensure quality stability.

Full chain customization service: supports color customization (such as special colors like navy blue, fluorescent green, etc.), particle size customization (0.5-3mm), and elasticity parameter customization, with flexible minimum order quantity and fast delivery within 7 days.

Global case validation:

A certain international chain kindergarten: The playground is paved with customized orange sulfur free granules, and the satisfaction rate of parents reaches 99%.

A high-end resort in Southeast Asia: salt spray resistant and sulfur free granules are used on the seaside trail, and after 5 years, there is still no cracking or fading phenomenon, reducing maintenance costs by 80%.

Whether it's upgrading sports fields, creating children's spaces, or meeting industrial project needs, our sulfur free EPDM rubber granules can provide free sample testing and one-on-one solution design. Click on the consultation to obtain customized quotes and embark on a new experience of high stability and zero hidden dangers in rubber applications!

WOW(LYG) New Material Co Ltd is a manufacturer specializing in the production of EPDM rubber granules. We use sulfur-free vulcanization technology, it increases the service life by more than 3 times than traditional EPDM granules, and enhances the performance, including anti-aging, high-temperature resistance, and colorfastness.

We have over 25 years of production experience and offer customization for colors and particle sizes. NO MOQ.