Post-Cure-Free Liquid Silicone Rubber(Fumed)
What is Post-Cure-Free Liquid Silicone Rubber(Fumed)?
- 20-60 Shore A
- two-part, 1:1 mix ratio
- injection-molding liquid silicone rubber designed for temperature senstive over-molding or thick walled applications
Post-Cure-Free Liquid Silicone Rubber (Fumed)
Post-cure-free, two-component liquid silicone rubber for injection molding, overmolding and thick-wall silicone components.
Hailan New Material's post-cure-free fumed liquid silicone rubber is a two-component addition-curing LSR designed to achieve stable curing during the primary molding process under specified processing conditions, reducing the need for a separate post-curing operation.
The material is available in multiple hardness grades and can be formulated for applications requiring low compression set, good resilience, mechanical strength and resistance to yellowing
Uses
Consumer goods
Grommets, gaskets, and seals
Overmolding of low temperature plastics
Overmolding of temperature sensitive components
Benefits
Low temperature curing
Faster deep section curing
Excellent processing perfomrance
Formulated to meet FDA/LFGB and Biocompatibility testing
Key Technical Specifications
|
Property |
Typical Specification |
|
Material Type |
Two-component addition-curing liquid silicone rubber |
|
Filler System |
Fumed silica reinforced |
|
Mixing Ratio |
1:1 |
|
Hardness |
20–60 Shore A |
|
Processing Method |
Liquid Injection Molding (LIM/LSR) |
|
Cure Characteristics |
Post-cure-free under specified processing conditions |
|
Appearance |
Grade dependent |
|
Color |
Transparent / Translucent / Customized |
|
Application |
Injection molding, overmolding, sealing and molded silicone components |
Note: Actual physical properties vary by grade. Please contact Hailan for the latest Technical Data Sheet (TDS) and grade-specific test data.
Why Fumed Silica Is Used in Silicone Rubber
Fumed silica is commonly used as a reinforcing filler in silicone rubber formulations.
Depending on the formulation and processing system, fumed silica can contribute to:
- Mechanical strength
- Tear resistance
- Elastic recovery
- Rheological control
- Dimensional stability
The final performance of an LSR formulation is determined by the silicone polymer, reinforcing system, crosslinking chemistry and formulation design rather than by one ingredient alone.
This is why material selection should be based on the complete technical requirements of the finished component.
Applications
Suitable grades can be used for products such as:
Silicone nipples
Sealing rings
Food-contact components
Kitchenware components
Silicone consumer products
Depending on the selected grade and required compliance, applications may include:
Medical device components
Silicone seals
Flexible medical components
Healthcare product components
The material can also be considered for:
Gaskets
O-rings
Sealing components
Industrial molded parts
High-performance silicone components
The material can also be considered for:
Baby bottle components
Pacifiers and nipples
Teething products
Baby feeding accessories
Silicone bibs and tableware
Infant care products
Baby product sealing components
Customized silicone molded parts
About HL-Silicone
Guangdong Hailan New Material Technology Co., Ltd., established in 2012, is a specialized silicone rubber manufacturer integrating R&D, production, and sales. With an annual capacity of 19,000 tons, Hailan provides silicone materials for household, electronics, power, cable, and new energy applications.
Hailan develops high-performance silicone solutions, including flame-retardant, conductive, thermal-conductive, and foaming materials, serving leading customers such as CATL and BYD. With its Hubei production base established in 2021, Hailan continues to expand its manufacturing capabilities and deliver customized silicone solutions worldwide.
Why Choose HL-Silicone?
Silicone Material Manufacturing Experience
Our product portfolio includes:
Liquid silicone rubber
HTV/HCR silicone rubber
Fumed silicone rubber
Precipitated silicone rubber
Specialty silicone materials
Silicone oils and related materials
Technical Support for B2B Buyers
Different products require different combinations of:
Hardness
Tensile strength
Tear strength
Elongation
Compression set
Cure speed
Processing characteristics
Quality & Manufacturing
We can support customers with:
Material selection
TDS and technical documentation
Sample evaluation
Processing recommendations
Application-specific formulation
Customized material development
Production support
Our Certificate
FDA
LFGB
Skin sensitization test non-polar extraction
Skin sensitization testing polar extracts
Packaging & Shipping
Package dimensions:
- 500G(115*95*95mm)
-1KG(147*112*112mm)
-3KG(175*18*18mm)
-5KG(205*21.5*21.5mm)
-10KG(27*26.5*26.5mm)
-20KG(360*335*335mm)
-200KG(900*605*605mm)
The normal delivery time is within 3-5 days after our bank confirms payment.
If you need an urgent order, please confirm with us.
-Global delivery
-Sea freight
-Express delivery
-Air freight
Frequently Asked Questions
What is the mixing ratio of this liquid silicone rubber?
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The standard mixing ratio for the applicable product family is 1:1 (Component A : Component B).
The two components should be accurately metered and mixed according to the product's processing instructions.
Is post-curing required?
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The material is designed to achieve the required cured properties during the primary molding process under the specified processing conditions.
This can reduce or eliminate a separate post-curing operation for suitable applications.
However, actual processing requirements depend on the selected grade, mold temperature, part thickness, curing conditions and final product specifications.
Can this material be used for LSR injection molding?
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Yes. The material is designed for liquid silicone rubber injection molding applications.
The appropriate molding parameters should be determined according to the specific grade and machine, including:
Mixing ratio
Injection pressure
Mold temperature
Cure time
Part geometry
Demolding conditions
Can it be used for overmolding?
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Selected grades can be considered for overmolding applications.
Before mass production, the compatibility between the silicone and substrate should be evaluated. Important factors include substrate type, surface condition, mold temperature, adhesion requirements and curing conditions.
What is the difference between fumed and precipitated silicone rubber?
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Fumed silica and precipitated silica are different reinforcing filler systems used in silicone formulations.
Fumed silica is commonly used to provide reinforcement and control rheological behavior in silicone materials. The final mechanical and processing properties depend on the complete formulation rather than the filler type alone.
If you are comparing fumed and precipitated silicone rubber for a specific application, Hailan can recommend the appropriate material based on your required properties and molding process.
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