Santoprene 8211-65 TPV | 70A High-Flow Colorable TPV

描述

Santoprene 8211-65 is a Natural, high-flow thermoplastic vulcanizate from Celanese developed for molded flexible components that require a combination of higher elastomeric stiffness, easy cavity filling and custom color capability.

Unlike very soft TPV grades primarily selected for tactile feel, Santoprene 8211-65 provides a firmer 70 Shore A response.

This makes the material suitable for components that need to retain a clearly defined shape while still bending, stretching and recovering like an elastomer.

Current Celanese portfolio data lists:

• 70 Shore A hardness
• Natural appearance
• 510% elongation at break
• 5.5 MPa tensile stress at break
• 2.5 MPa stress at 100% elongation
• 29% compression set
• Improved flow for easier processability
• Enhanced colorability

The combination of high flow and 70A hardness makes Santoprene 8211-65 especially interesting for parts with:

• Thin flexible walls
• Narrow ribs
• Long flow paths
• Defined sealing lips
• Detailed surface geometry
• Small gates
• Complex flexible housings

It offers greater mechanical support than softer TPV while retaining substantial elastic deformation.

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

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

Key Engineering Features of Santoprene 8211-65

Designed for Flexible Parts That Need More Structure

One of the most useful ways to understand Santoprene 8211-65 is as a material between very soft elastomers and semi-rigid thermoplastics.

At approximately 70 Shore A, the material remains flexible but provides greater resistance to:

• Folding
• Buckling
• Local deformation
• Shape collapse

This can be useful in parts such as:

• Protective boots
• Grommets
• Flexible housings
• Bellows
• Sealing lips
• Cable interfaces
• Protective sleeves

These components often need enough flexibility for installation or movement but enough stiffness to maintain their intended geometry.

Typical Applications for Santoprene 8211-65

Typical Properties of Santoprene 8211-65

Physical Properties

The 65 in the grade designation should not be interpreted as the exact measured hardness. Current portfolio data gives approximately 70 Shore A.

Mechanical Properties

These properties give Santoprene 8211-65 a useful balance of strength, flexibility and shape retention.

510% Elongation for Flexible Engineering Designs

Santoprene 8211-65 provides approximately:

510% elongation at break

This means the material can tolerate substantial deformation before failure.

That is useful for components that may need to:

• Stretch during assembly
• Flex repeatedly
• Bend around another component
• Expand locally
• Compress and recover
• Absorb impact

High elongation can also help reduce cracking risk in complex flexible geometries.

70 Shore A for Better Dimensional Support

The approximately 70 Shore A hardness provides an important design advantage.

A component made from Santoprene 8211-65 can remain flexible while offering more support than very soft TPV.

This helps in designs where the component must maintain:

• Defined lips
• Ribs
• Walls
• Retaining features
• Flexible channels
• Protective edges

The material is therefore useful where maximum softness is not the objective.

High Flow for Complex Injection-Molded Parts

The defining feature of the 8211 family is Improved Flow for Easier Processability.

For Santoprene 8211-65, this is especially useful because medium-hard elastomers may be used in more structurally detailed parts.

Improved flow can help fill:

• Thin sections
• Narrow ribs
• Small gates
• Long cavities
• Detailed textures
• Complex corners

Potential benefits include:

• Reduced short shots
• Improved detail reproduction
• Better cavity balance
• More stable multi-cavity molding
• Greater design freedom

Thin-Wall Flexible Components

High flow makes Santoprene 8211-65 particularly interesting for flexible components with thinner wall sections.

Potential parts include:

• Protective membranes
• Thin housings
• Cable boots
• Sealing flanges
• Flexible collars
• Small bellows
• Grommet lips

Thin sections require the material to travel through the mold quickly before significant cooling occurs.

The high-flow formulation helps support this requirement.

Grommets & Cable Protection

The combination of 70A hardness + 510% elongation makes Santoprene 8211-65 relevant to grommets and cable accessories.

Such components may need to:

• Flex during installation
• Hold a cable securely
• Resist repeated bending
• Protect against sharp housing edges
• Maintain geometry over time

Potential applications include:

• Cable-entry grommets
• Connector boots
• Appliance wiring protection
• Electrical cable sleeves
• Flexible strain-relief components

Protective Boots & Bellows

Santoprene 8211-65 can also be evaluated for protective boots and bellows.

These parts often experience repeated:

• Compression
• Extension
• Folding
• Bending

while also needing enough stiffness to avoid collapsing uncontrollably.

The 70A hardness can provide structural support while the high elongation enables repeated movement.

Enhanced Colorability

Santoprene 8211-65 is supplied in Natural form and belongs to Celanese’s Enhanced Colorability family.

This allows the material to be developed in colors such as:

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

Colorability is useful for:

• Appliances
• Consumer products
• Electronics
• Interior components
• Industrial identification parts

A compatible TPV masterbatch should be used.

Appearance-Sensitive Applications

Natural TPV is particularly useful when the finished component is visible.

Examples include:

• Appliance interfaces
• Colored flexible covers
• Consumer housings
• Handle components
• Protective edges
• Controls

Tool texture can also be used to create:

• Matte surfaces
• Fine grain
• Leather-like texture
• Technical patterns

Processing conditions should be optimized to maintain consistent appearance over the full cavity.

Compression-Set Performance

Current portfolio data gives Santoprene 8211-65 a compression set of approximately:

29%

Compression set helps indicate how much permanent deformation remains after a defined compression test.

For flexible engineering components, this is relevant to:

• Sealing lips
• Gaskets
• Protective interfaces
• Compression pads
• Equipment seals

The grade can therefore be considered for moderate sealing requirements where a 70A material is appropriate.

Low-Temperature Flexibility

Published grade-specific data places the low-temperature brittleness point at approximately:

-63°C

This gives Santoprene 8211-65 useful flexibility in cold environments.

Potential applications include:

• Outdoor equipment
• Automotive flexible parts
• Winter-use components
• Refrigeration equipment
• Cold-storage systems

Brittleness temperature is a laboratory property and should not be interpreted as the guaranteed minimum continuous-use temperature.

Heat-Aging Behavior

Grade-specific accelerated aging information at 150°C for 168 hours shows relatively limited changes in mechanical properties under that test condition.

This type of data is useful when evaluating:

• Thermal aging resistance
• Long-term material stability
• Flexible parts near elevated-temperature equipment

However, a short-term heat-aging test should not be interpreted as a continuous-use temperature rating.

Why Improved Flow Matters at 70A

As elastomer hardness increases, the design of the part may become more structurally complex.

Manufacturers may want:

• Thinner walls
• Smaller features
• More defined ribs
• Longer flow lengths
• More complex cavities

The improved-flow formulation of Santoprene 8211-65 helps address these processing requirements.

This is one reason the grade is useful beyond simple seals and gaskets.

Injection Molding of Santoprene 8211-65

Santoprene 8211-65 is primarily designed for:

• Injection Molding
• Multi-Injection Molding
• Blow Molding

Grade-specific processing guidance provides a useful initial molding window.

Material Preparation

Controlled material preparation helps improve:

• Surface consistency
• Mold filling
• Shot stability
• Color uniformity

Injection Molding Temperature

A useful grade-specific starting range is:

These values provide a practical starting point before machine-specific optimization.

Holding Pressure

A useful starting point for holding pressure is approximately:

50–75% of actual injection pressure

The objective is to obtain consistent cavity packing without unnecessary overpacking.

Holding pressure should be adjusted according to:

• Gate size
• Wall thickness
• Part dimensions
• Shrinkage
• Surface appearance

Screw Speed

A relatively high screw speed is typically useful:

100–200 rpm

Higher screw speed can help improve:

• Melt uniformity
• Plasticization
• Color-masterbatch distribution
• Cycle consistency

Because Santoprene TPV is shear dependent, higher shear also helps reduce apparent viscosity.

Back Pressure

Back pressure is not always required.

Where additional melt homogeneity is needed, approximately:

0.3–0.7 MPa

can be used as a starting range.

Back pressure may also be useful when processing custom color masterbatch.

Shear-Dependent Flow

Santoprene 8211-65 is shear dependent.

As shear rate rises:

apparent melt viscosity decreases.

This has an important processing implication:

When a mold is difficult to fill, the best solution is not necessarily to raise melt temperature substantially.

Flow may instead be improved through:

• Faster injection
• Higher screw speed
• Optimized gate dimensions
• Balanced runners
• Shorter restrictive flow paths

Gate Design

High-flow TPV still requires proper gate design.

Important considerations include:

• Gate dimensions
• Gate location
• Flow length
• Wall thickness
• End-of-fill venting

For thin flexible sections, the gate should allow rapid filling without excessive pressure drop.

Mold Venting

Good venting helps reduce:

• Burn marks
• Short shots
• Trapped air
• Poor surface definition
• Excessive injection pressure

Particularly important locations include:

• End-of-fill areas
• Fine ribs
• Thin sealing lips
• Weld-line zones

Multi-Cavity Molding

Santoprene 8211-65 can be particularly useful for high-volume multi-cavity production because of its improved flow.

Mold designers should control:

• Runner balance
• Gate uniformity
• Mold temperature
• Injection-speed profile
• Cavity pressure

This helps maintain consistent flexible-part dimensions across all cavities.

Multi-Injection Molding

Santoprene 8211-65 also supports multi-injection molding.

It can therefore be considered for components containing:

• Flexible functional zones
• Elastomeric edges
• Integrated sealing features
• Soft protective areas

However, 8211-65 is not a dedicated B100/B150 bonding grade.

If chemical adhesion to PC, ABS, PC/ABS, PMMA or another rigid substrate is essential, a specific bondable Santoprene grade should be selected.

Blow Molding Capability

Another useful distinction for Santoprene 8211-65 is that grade-specific processing information includes Blow Molding.

Potential uses include selected:

• Flexible hollow components
• Protective boots
• Bellows-type parts
• Flexible technical containers

The exact geometry and melt-strength requirement should be validated during processing trials.

Material Compatibility

Care should be taken when switching from incompatible polymers.

Processing equipment should be thoroughly purged after materials such as:

• POM / Acetal
• PVC

Contamination can affect:

• Processing stability
• Surface appearance
• Mechanical performance
• Color consistency

This is especially important with a Natural grade.

Manufacturing-Stream Regrind

Current processing guidance allows approximately:

20% maximum regrind

as a starting reference.

Suitable clean manufacturing scrap may include:

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

For Natural and custom-colored parts, regrind should be controlled carefully because contamination or thermal history may cause:

• Color shift
• Surface defects
• Property variation

Why Choose Santoprene 8211-65?

Santoprene 8211-65 is particularly attractive for applications that require a firmer flexible engineering TPV without sacrificing moldability.

Its key combination is:

• 70 Shore A
• 510% elongation
• 5.5 MPa tensile strength
• 2.5 MPa stress at 100% elongation
• 29% compression set
• High-flow formulation
• Natural / Enhanced Colorability
• 0.930 g/cm³ density
• Useful low-temperature flexibility
• Injection molding
• Multi-injection molding
• Blow molding

For detailed flexible housings, protective components, grommets and medium-firm sealing geometries, Santoprene 8211-65 provides a useful combination of processing freedom and elastomeric performance.

Related Products

We supply Santoprene TPV materials for different flow, hardness, color and processing requirements.

Typical product families include:

• Santoprene 8211 Series
• Santoprene High-Flow TPV
• Santoprene Enhanced Colorability TPV
• Santoprene Natural TPV
• Santoprene injection-molding grades
• Santoprene flexible engineering grades
• Santoprene grommet materials
• Santoprene sealing grades
• Santoprene blow-molding grades

View More TPV Thermoplastic Vulcanizates →

Technical Documents for Santoprene 8211-65

Need technical documents for Santoprene 8211-65?

📧 Email: ruiqingchem@gmail.com

📝 Online form: Contact Us →

FAQ About Santoprene 8211-65

Q1: What is Santoprene 8211-65?

Santoprene 8211-65 is a Natural, high-flow TPV from Celanese designed for easier molding of flexible engineering components.

Q2: What is the hardness of Santoprene 8211-65?

Current Celanese portfolio data gives approximately 70 Shore A.

Q3: Is Santoprene 8211-65 exactly 65 Shore A?

No. The grade designation contains 65, while the published typical hardness is approximately 70 Shore A.

Q4: What is the tensile stress at break?

The current typical value is approximately 5.5 MPa.

Q5: What is the elongation at break?

The published typical value is approximately 510%.

Q6: What is the stress at 100% elongation?

The typical value is approximately 2.5 MPa.

Q7: What is the compression set?

Current Celanese portfolio data gives approximately 29%.

Q8: What color is Santoprene 8211-65?

The standard grade is Natural.

Q9: Can Santoprene 8211-65 be colored?

Yes. Enhanced colorability is one of the defining features of the 8211 series.

Q10: Is Santoprene 8211-65 a high-flow material?

Yes. Celanese specifically positions the grade as providing Improved Flow for Easier Processability.

Q11: Is Santoprene 8211-65 suitable for thin-wall injection molding?

Its high-flow formulation makes it particularly relevant to thin and detailed flexible geometries.

Q12: Can Santoprene 8211-65 be used for grommets?

Yes. Its 70A hardness, high elongation and flexible behavior make it suitable for evaluation in grommet-type components.

Q13: Can Santoprene 8211-65 be injection molded?

Yes. Injection molding is a primary processing route.

Q14: Can Santoprene 8211-65 be blow molded?

Yes. Grade-specific processing information includes blow molding.

Q15: Is Santoprene 8211-65 a dedicated bonding grade?

No. For direct chemical bonding to rigid engineering plastics, a dedicated Santoprene B100 or B150 grade is normally more appropriate.

Q16: What is the main advantage of Santoprene 8211-65?

Its main advantage is the combination of 70 Shore A hardness + 510% elongation + high flow + Enhanced Colorability, providing a good balance between flexible engineering performance and easier injection molding.

Request Santoprene 8211-65 Price & Technical Support

For pricing, availability or technical support for Santoprene 8211-65, please provide:

• Required quantity
• Destination country or port
• Application
• Required color
• Part wall thickness
• Injection-molding or blow-molding process
• Grommet / seal / protective boot application
• Required hardness
• Flow-length requirement
• Operating temperature
• Low-temperature requirement
• Chemical-contact environment
• TDS / SDS requirement
• COA requirement
• Sample requirement, if applicable

📧 Email: ruiqingchem@gmail.com

📝 Send Inquiry →