Santoprene 8211-55 TPV | 59A High-Flow Colorable Seal TPV

描述

Santoprene 8211-55 is a natural, high-flow thermoplastic vulcanizate from Celanese designed for flexible molded components where easy processing, useful elastic recovery and custom color capability are required together.

This grade belongs to the Santoprene Enhanced Colorability / Improved Flow family.

Current Celanese portfolio data lists:

• 59 Shore A hardness
• Natural appearance
• 480% elongation at break
• 4.6 MPa tensile stress at break
• 2.1 MPa tensile stress at 100% elongation
• 19% compression set at 70°C / 22 h
• Improved flow for easier processability
• Enhanced colorability

The combination of 59A hardness and only 19% compression set makes Santoprene 8211-55 particularly interesting for sealing components that need more structural support than very soft grades while still maintaining good recovery after compression.

Its high-flow behavior also makes it suitable for:

• Thin sealing lips
• Detailed molded gaskets
• Narrow ribs
• Small gates
• Long flow paths
• Multi-cavity molds
• Precision flexible components

Because the material is supplied in a Natural formulation, it can also be customized into light and brand-specific colors.

For more TPV materials, visit our TPV Thermoplastic Vulcanizates Product Category →.

For current Santoprene portfolio information, see the Official Celanese Santoprene & Geolast Product Finder →.

Key Features of Santoprene 8211-55

Typical Applications for Santoprene 8211-55

Santoprene 8211-55 is particularly well suited to molded sealing and flexible engineering parts.

Typical Properties of Santoprene 8211-55

Physical Properties

The grade name includes 55, but Celanese’s current Product Finder gives a measured typical hardness of 59 Shore A.

Mechanical Properties

Celanese’s current Product Finder identifies these values for Santoprene 8211-55.

19% Compression Set – A Strong Sealing Advantage

One of the strongest technical selling points of Santoprene 8211-55 is its published:

19% compression set at 70°C / 22 hours

For a flexible sealing material, compression-set performance is important because the component must recover after being compressed between two surfaces.

Lower permanent deformation can help maintain:

• Sealing contact
• Contact pressure
• Gasket geometry
• Dimensional recovery
• Long-term fit

This makes Santoprene 8211-55 especially relevant for:

• Housing gaskets
• Equipment seals
• Appliance seals
• HVAC interfaces
• Molded sealing rings
• Flexible closures

The 19% value also gives this grade a very clear SEO differentiator compared with more generic high-flow TPV pages.

59 Shore A – Balanced Softness and Support

At approximately 59 Shore A, Santoprene 8211-55 sits in a useful middle-soft hardness range.

This gives the material enough flexibility to:

• Conform to mating surfaces
• Compress under assembly
• Bend without cracking
• Absorb vibration

while still providing enough support for:

• Defined sealing lips
• Molded ribs
• Grommets
• Flexible housings
• Functional elastomeric structures

This balance is useful when a very soft 35–45A material feels too compliant but a 70A material is too firm.

High-Flow Injection Molding

The 8211 series is specifically positioned by Celanese for improved flow and easier processability.

This is especially useful because flexible TPV compounds can become difficult to process in:

• Small gates
• Thin wall sections
• Long flow paths
• Complex sealing geometries
• Multi-cavity tooling

High-flow behavior can help:

• Improve mold filling
• Reduce short shots
• Improve detail reproduction
• Reduce excessive injection pressure
• Improve cavity balance

For mold designers, this gives more freedom to create fine flexible geometry.

Thin-Wall Seal Geometry

Santoprene 8211-55 can be particularly useful for thin flexible sealing features.

Typical examples include:

• Fine sealing lips
• Dust seals
• Housing-edge seals
• Connector interfaces
• Flexible membranes
• Small flexible ribs

These features often require a material that can flow through a narrow section before cooling.

The improved-flow formulation supports this kind of geometry better than a conventional higher-viscosity elastomer.

Natural & Enhanced Colorability

Santoprene 8211-55 is supplied in a Natural formulation.

This gives product designers more appearance options than a standard black TPV.

Possible colors include:

• White
• Gray
• Blue
• Red
• Green
• Beige
• Brand-specific colors
• Functional identification colors

This is especially useful in:

• Appliances
• Consumer products
• Automotive interiors
• Visible industrial parts
• Color-coded components

Compatible color masterbatch should be evaluated for:

• Color dispersion
• Flow
• Surface finish
• Mechanical-property retention
• Thermal stability

Consumer & Appliance Applications

The combination of Natural appearance, medium-soft hardness and improved flow makes Santoprene 8211-55 suitable for consumer-facing parts.

Potential applications include:

• Soft housings
• Appliance seals
• Protective edges
• Flexible buttons
• Soft grips
• Cable-entry components
• Gaskets

The 59A hardness gives the material a firmer tactile response than very soft TPV while still maintaining flexibility.

Automotive Flexible Components

Santoprene TPV is broadly used in automotive applications. Celanese’s portfolio spans automotive interior, exterior and under-hood applications.

Santoprene 8211-55 can be evaluated for selected:

• Interior flexible components
• Seals
• Grommets
• HVAC interfaces
• Flexible covers
• Protective molded parts

Any OEM-specific requirement should be confirmed against the applicable customer specification.

Flex-Fatigue Performance

TPV materials are commonly selected for parts that experience repeated movement.

Santoprene 8211-55 is suitable for components subjected to:

• Bending
• Stretching
• Compression
• Recovery
• Repeated flexing

Potential uses include:

• Flexible sealing lips
• Cable interfaces
• Dynamic gaskets
• Repeated-motion components

Ozone & Environmental Resistance

Santoprene TPV is known for useful ozone and weathering resistance as a material family. Celanese lists ozone resistance, weathering resistance and flex-fatigue resistance among the broader technical strengths of Santoprene TPV.

This can be valuable in:

• Outdoor components
• Automotive parts
• Electrical equipment
• Industrial seals

Chemical Resistance

Santoprene TPV can be evaluated for use in many common chemical environments.

Typical contact media may include:

• Water
• Detergents
• Cleaning fluids
• Dilute acids
• Dilute alkalis
• Selected oils and fluids

Compatibility should be confirmed using the actual chemical, concentration, temperature and exposure time.

Why Choose Santoprene 8211-55?

Santoprene 8211-55 is especially useful when an application needs:

• 59 Shore A flexibility
• 19% compression set
• High flow
• Natural colorability
• 480% elongation
• 4.6 MPa tensile strength
• 2.1 MPa stress at 100% elongation
• Detailed mold filling
• Precision sealing geometry
• Thermoplastic processing

The strongest positioning for this grade is:

a high-flow, medium-soft, colorable TPV with unusually attractive compression-recovery performance for molded seals and gaskets.

Processing Guidelines for Santoprene 8211-55

Santoprene 8211-55 is intended primarily for:

• Injection Molding
• Multi-Injection Molding

Its high-flow design makes mold-filling strategy particularly important.

Processing Priorities

For stable production, focus on:

• Controlled material preparation
• Fast and balanced filling
• Appropriate gate size
• Proper mold venting
• Consistent melt temperature
• Balanced runner design

Exact production temperatures should follow the latest grade-specific Celanese TDS.

Shear-Dependent Flow

Santoprene TPV is strongly shear dependent.

As shear rate increases:

apparent melt viscosity decreases.

This means processors can often improve filling through:

• Higher injection speed
• Appropriate screw speed
• Optimized gate dimensions
• Shorter pressure-loss paths

rather than simply increasing material temperature.

Gate Design

For Santoprene 8211-55, gate design should support:

• Adequate shear
• Fast filling
• Low pressure loss
• Stable packing
• Good surface quality

Small parts with thin sealing lips may require especially careful gate placement.

Mold Venting

Good venting is important for high-flow injection molding.

Poor venting may cause:

• Burn marks
• Short shots
• Poor surface finish
• High injection pressure
• Incomplete fine details

Vents should be placed near end-of-fill locations and likely air traps.

Multi-Cavity Production

High-flow TPV can be useful in multi-cavity tooling.

For stable cavity-to-cavity consistency, control:

• Runner balance
• Gate dimensions
• Mold temperature
• Injection profile
• Holding pressure

This is particularly important for small seals and gaskets produced at high volumes.

Multi-Injection Molding

Santoprene 8211-55 supports multi-injection molding.

Possible uses include:

• Flexible functional zones
• Integrated soft sections
• Multi-material consumer parts

However, this grade should not automatically be presented as a dedicated bonding grade.

If direct chemical bonding to PC, ABS or other rigid plastics is required, a dedicated Santoprene B100/B150 bonding grade should be evaluated.

Material Compatibility

When switching materials, processing equipment should be thoroughly purged.

Special care is typically taken with:

• POM / Acetal
• PVC

Clean processing helps reduce:

• Contamination
• Surface defects
• Unstable flow
• Color inconsistency

Manufacturing-Stream Recycling

Santoprene TPV is thermoplastic and can support controlled manufacturing-stream reprocessing.

Typical clean scrap may include:

• Sprues
• Runners
• Start-up material
• Selected rejected components

For Natural or light-colored components, processors should also monitor:

• Color shift
• Contamination
• Surface appearance

Related Products

We supply Santoprene TPV materials for different hardness, flow, colorability and sealing requirements.

Typical product families include:

• Santoprene 8211 Series
• Santoprene High-Flow TPV
• Santoprene Enhanced Colorability TPV
• Santoprene Natural TPV
• Santoprene injection-molding grades
• Santoprene sealing materials
• Santoprene gasket materials
• Santoprene consumer-product TPV
• Santoprene automotive flexible materials

View More TPV Thermoplastic Vulcanizates →

Technical Documents for Santoprene 8211-55

Need technical documents for Santoprene 8211-55?

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FAQ About Santoprene 8211-55

Q1: What is Santoprene 8211-55?

Santoprene 8211-55 is a natural, high-flow and enhanced-colorability TPV from Celanese designed for easier molding of flexible technical parts.

Q2: What is the hardness of Santoprene 8211-55?

The current Celanese Product Finder lists approximately 59 Shore A.

Q3: Is Santoprene 8211-55 exactly 55 Shore A?

No. The grade designation contains 55, while the current published typical hardness is approximately 59 Shore A.

Q4: What is the elongation at break?

The current published typical value is approximately 480%.

Q5: What is the tensile stress at break?

The typical value is approximately 4.6 MPa.

Q6: What is the stress at 100% elongation?

The typical value is approximately 2.1 MPa.

Q7: What is the compression set?

Celanese’s current Product Finder lists approximately 19% at 70°C / 22 hours.

Q8: Is Santoprene 8211-55 high flow?

Yes. Celanese positions the 8211 family as providing improved flow for easier processability.

Q9: Can Santoprene 8211-55 be colored?

Yes. It belongs to the Enhanced Colorability family and is supplied in Natural form.

Q10: Is Santoprene 8211-55 suitable for seals?

Yes. Its 59A hardness, 19% compression set and flexible behavior make it relevant to many molded sealing applications.

Q11: Is Santoprene 8211-55 suitable for thin sealing lips?

Yes. Its improved-flow formulation is particularly useful for thin and detailed flexible geometries.

Q12: Can Santoprene 8211-55 be injection molded?

Yes. Injection molding is a primary processing route.

Q13: Can Santoprene 8211-55 be used in multi-injection molding?

Yes. Multi-injection molding can be used for selected designs.

Q14: Is Santoprene 8211-55 a bonding grade?

No. It should not automatically be treated as a dedicated B100 or B150 bonding TPV.

Q15: What is the biggest advantage of Santoprene 8211-55?

Its strongest combination is 59 Shore A + high flow + 19% compression set + enhanced colorability, making it especially attractive for molded seals and detailed flexible parts.

Q16: Is Santoprene 8211-55 available in Natural?

Yes. The current Celanese Product Finder lists the appearance as Natural.

Request Santoprene 8211-55 Price & Technical Support

For pricing, availability or technical support for Santoprene 8211-55, please provide:

• Required quantity
• Destination country or port
• Application
• Required color
• Seal or gasket geometry
• Part wall thickness
• Required hardness
• Compression-set requirement
• Injection-molding conditions
• Flow-length requirement
• Operating temperature
• Chemical-contact environment
• TDS / SDS requirement
• COA requirement
• Sample requirement, if applicable

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