Santoprene 8211-85M350 TPV | Automotive Interior Skin Material

描述

Santoprene 8211-85M350 is a hard, colorable thermoplastic vulcanizate from Celanese developed specifically for automotive interior skin applications.

Unlike conventional general-purpose TPV grades, Santoprene 8211-85M350 is engineered around the surface requirements of visible interior components.

Its application profile emphasizes:

• Scratch resistance
• Mar resistance
• Abrasion resistance
• Low gloss
• Low emissions
• Comfortable tactile feel
• High-flow injection molding
• Colorability
• Compatibility with polypropylene-based structures

Current Celanese Product Finder data lists:

• 86 Shore A hardness
• Natural appearance
• 480% elongation at break
• 8.8 MPa tensile stress at break
• Improved flow
• Improved abrasion resistance

Celanese’s automotive grade selection guide separately places Santoprene 8211-85M350 in the Interior category and identifies improved scratch and mar resistance as its defining characteristic.

This makes the grade particularly relevant to interior parts where the TPV surface is visible and repeatedly touched, rubbed or contacted during vehicle use.

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 8211-85M350

Designed for Automotive Interior Skins

The most important positioning of Santoprene 8211-85M350 is as an automotive interior skin material.

A molded interior skin often needs to satisfy several requirements at the same time:

• Good appearance
• Consistent color
• Controlled gloss
• Scratch resistance
• Resistance to fingernail or object contact
• Comfortable tactile response
• Compatibility with the rigid backing material
• Stable large-area molding

Santoprene 8211-85M350 was developed around this combination.

Rather than acting only as a flexible structural material, it functions as a visible functional surface.

Typical Applications for Santoprene 8211-85M350

Typical Properties of Santoprene 8211-85M350

Physical Properties

The 85 contained in the grade designation should not be treated as the exact measured hardness. Current Celanese portfolio data gives approximately 86 Shore A.

Mechanical Properties

Celanese’s current Product Finder publishes these exact grade values.

No current Product Finder value is listed for 100% modulus or compression set for this grade, so those values should not be borrowed from neighboring 8211 grades.

86 Shore A for Firm Interior Surfaces

At approximately 86 Shore A, Santoprene 8211-85M350 provides a relatively firm surface.

This is useful in automotive interiors because a surface that is too soft may:

• Deform excessively
• Mark easily
• Feel unstable
• Show poor dimensional definition

The higher hardness helps provide:

• Surface support
• Defined molded geometry
• Better edge retention
• Firm tactile response

while the TPV still provides more flexibility than a rigid thermoplastic surface.

Scratch & Mar Resistance

One of the strongest differentiators of Santoprene 8211-85M350 is its improved resistance to scratch and mar damage.

Celanese specifically identifies this property in its automotive grade slate.

Automotive interior surfaces can be exposed to repeated contact from:

• Fingernails
• Keys
• Bags
• Clothing
• Seat-belt hardware
• Cleaning tools
• General passenger use

A scratch-resistant TPV helps preserve the visible appearance of the part over time.

Improved Abrasion Resistance

Celanese’s Product Finder also lists improved abrasion resistance for Santoprene 8211-85M350.

Abrasion resistance is particularly useful for:

• Door-contact areas
• Storage compartments
• Console edges
• Frequently touched surfaces
• Parts exposed to repeated rubbing

This gives the grade a stronger interior-surface positioning than a standard high-flow molding grade.

Low-Gloss Interior Appearance

Automotive interior materials increasingly require controlled gloss.

Excessive gloss can create:

• Reflections
• Visual mismatch
• An inexpensive appearance
• Greater visibility of surface defects

Santoprene 8211-85M350 is designed for low-gloss automotive interior surfaces.

The final gloss level also depends on:

• Tool texture
• Mold surface
• Color masterbatch
• Processing conditions
• Part geometry

This allows the material to be integrated into different interior styling concepts.

Comfort-Touch Surface

Santoprene 8211-85M350 is also intended to provide a more comfortable tactile response than a rigid PP surface.

This is useful in areas where occupants regularly make contact with the component.

Potential examples include:

• Door trim
• Armrest areas
• Center-console surfaces
• Control surrounds
• Storage-compartment edges

The relatively high 86A hardness means it does not behave like a very soft foam or gel.

Instead, it provides a firm soft-touch / comfort-touch elastomeric surface.

Low Emissions for Vehicle Interiors

Automotive cabin materials are often evaluated for emissions because the passenger compartment is an enclosed environment.

Santoprene 8211-85M350 was developed with low-emission performance, including concerns such as:

• Fogging
• Odor
• Interior volatile emissions

This is an important distinction from many generic TPV grades.

For OEM projects, final compliance should always be checked against the exact required test method and current customer specification.

Natural & Easy Coloring Formulation

Santoprene 8211-85M350 is supplied in a Natural / easy-coloring formulation.

This allows interior designers to develop colors such as:

• Black
• Charcoal
• Dark gray
• Light gray
• Beige
• Brown
• Blue
• Custom OEM interior colors

This is especially valuable because automotive interiors often require close matching between:

• PP substrate
• TPV skin
• Adjacent trim
• Painted components
• Textile or leather surfaces

Color Consistency

For automotive interior parts, color matching involves more than simply selecting a pigment.

The final appearance can depend on:

• Masterbatch carrier
• Pigment concentration
• Tool texture
• Part thickness
• Processing temperature
• Shear
• Gloss level

Production color trials should therefore be conducted on the actual molded geometry.

Designed for PP-Based Interior Structures

Santoprene 8211-85M350 was developed for use as a skin over rigid polypropylene substrates.

A typical construction can be:

Rigid PP structure + Santoprene 8211-85M350 visible skin

This allows the rigid component to provide:

• Structural stiffness
• Dimensional stability
• Mounting features

while the TPV surface provides:

• Tactile feel
• Scratch resistance
• Low gloss
• Color
• Surface protection

PP Compatibility

The grade’s polyolefin-based chemistry makes it suitable for integration with selected polypropylene constructions.

Potential benefits include:

• Simplified hard/soft material system
• Compatible polymer families
• Multi-component molding
• Manufacturing-stream recyclability

The exact PP substrate formulation should still be validated because additives, fillers and mold-release agents can influence interfacial performance.

Alternative to Soft-Touch Paint

One important commercial positioning for Santoprene 8211-85M350 is its use as an integrated material solution where a manufacturer might otherwise consider a soft-touch painted PP component.

Using a molded TPV skin can potentially reduce secondary operations such as:

• Surface coating
• Paint application
• Drying
• Additional handling

It can also integrate tactile properties directly into the molded component.

Whether it is economically preferable depends on:

• Part size
• Production volume
• Tooling
• Surface specification
• Manufacturing layout

High-Flow Performance

Santoprene 8211-85M350 is specifically described as a high-flow material.

This is important for automotive interior skins because such parts can involve:

• Large surface areas
• Thin molded layers
• Long flow paths
• Fine surface textures
• Complex geometry

High flow can help the melt reach distant cavity regions before excessive cooling occurs.

Large-Area Interior Molding

Large interior parts create different processing challenges from small seals or grommets.

Typical concerns include:

• Long flow length
• Flow-front balance
• Pressure loss
• Surface consistency
• Weld lines
• Texture reproduction

Santoprene 8211-85M350’s high-flow formulation is especially relevant to this type of molding.

Multi-Component Injection Molding

The grade can be processed on conventional:

• Single-component injection-molding equipment
• Multi-component injection-molding equipment

Multi-component molding allows a manufacturer to integrate:

rigid PP + TPV skin

within an automated molding process.

Potential advantages include:

• Reduced assembly
• Integrated surface function
• Consistent skin placement
• Fewer downstream operations

Injection Molding Guidelines

Current grade-specific Celanese processing data provides the following starting conditions:

These values are specifically associated with Santoprene 8211-85M350 and provide a much better starting point than generic TPV settings.

Drying & Material Preparation

Santoprene 8211-85M350 is considered relatively low in moisture sensitivity, but controlled drying can be used to ensure processing consistency.

A useful grade-specific starting point is:

80°C for at least 3 hours

with moisture controlled to:

≤0.08%

This can help support:

• Stable surface appearance
• Consistent molded texture
• Reliable cavity filling
• Reduced contamination-related defects

Melt Temperature

The recommended melt-temperature range is approximately:

190–215°C

with approximately:

200°C optimum

This window should be optimized according to:

• Part area
• Skin thickness
• Injection speed
• Gate size
• PP substrate
• Surface texture

Mold Temperature

The recommended mold-temperature range is:

20–50°C

with approximately:

35°C optimum

Mold temperature can influence:

• Surface gloss
• Texture replication
• Flow
• Cycle time
• Interface quality

For visible automotive interior surfaces, appearance requirements may justify tighter mold-temperature control than would be needed for a hidden technical part.

Shear-Dependent Flow

Santoprene 8211-85M350 is shear dependent.

As shear rate increases:

apparent melt viscosity decreases.

This is especially useful in large-area skin molding.

Flow can often be improved through:

• Injection-speed optimization
• Gate design
• Runner design
• Screw-speed adjustment

rather than simply increasing melt temperature.

Gate Design for Interior Skins

Gate design is critical because the finished surface is visible.

Poor gate placement may create:

• Flow marks
• Weld lines
• Gloss variation
• Uneven filling
• Surface defects

For large-area interior surfaces, gate location should be selected to balance:

• Flow distance
• Surface appearance
• Cavity pressure
• Weld-line location

Mold Texture & Gloss Control

The final appearance of Santoprene 8211-85M350 can be influenced strongly by mold texture.

Possible finishes include:

• Fine matte
• Grain
• Leather-like texture
• Technical texture
• Smooth low-gloss surface

Because automotive interiors often contain multiple adjacent materials, mold texture can help create visual consistency between the TPV skin and surrounding trim.

Scratch Resistance Depends on Surface Design

Material formulation is important, but finished-part scratch performance can also be affected by:

• Surface texture
• Pigment system
• Wall thickness
• Processing
• Test method

For this reason, final scratch and mar validation should be conducted on the production-intent molded surface.

480% Elongation

Despite the relatively high hardness, Santoprene 8211-85M350 maintains approximately:

480% elongation at break.

This supports:

• Complex molded geometry
• Local deformation
• Assembly movement
• Impact response
• Flexible skin behavior

The combination of high hardness and substantial elongation allows the material to function as a durable interior surface rather than a brittle decorative layer.

8.8 MPa Tensile Strength

Published tensile stress at break is approximately:

8.8 MPa.

This provides useful mechanical durability for molded interior skins and flexible trim components.

The material can therefore withstand handling and deformation during:

• Molding
• Assembly
• Vehicle use
• Service operations

Manufacturing-Stream Recycling

Santoprene 8211-85M350 is polyolefin based and can support controlled manufacturing-stream recycling.

Clean production scrap may include:

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

This can be especially useful in integrated PP/TPV manufacturing systems.

Final scrap-management practice should follow production-quality and appearance requirements.

Why Choose Santoprene 8211-85M350?

The main reason to select Santoprene 8211-85M350 is its specialized automotive interior surface performance.

Its strongest combination is:

• 86 Shore A hardness
• 480% elongation
• 8.8 MPa tensile strength
• Improved scratch resistance
• Improved mar resistance
• Improved abrasion resistance
• Low-gloss appearance
• Low-emission formulation
• Comfort-touch surface
• Natural / easy-coloring formulation
• High flow
• PP-substrate application
• Multi-component injection molding

This makes it especially suitable for visible automotive interior parts where appearance, feel and durability are all important.

Related Products

We supply Santoprene TPV materials for automotive interior, colorability, surface durability and molding requirements.

Typical product families include:

• Santoprene M350 Interior Grades
• Santoprene Automotive Interior TPV
• Santoprene Scratch-Resistant TPV
• Santoprene Low-Gloss TPV
• Santoprene Low-Emission TPV
• Santoprene Colorable TPV
• Santoprene High-Flow TPV
• Santoprene PP-Compatible Interior Materials
• Santoprene Multi-Component Molding Grades

View More TPV Thermoplastic Vulcanizates →

Technical Documents for Santoprene 8211-85M350

Need technical documents for Santoprene 8211-85M350?

📧 Email: ruiqingchem@gmail.com

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Please state Santoprene 8211-85M350 and specify your automotive interior application, substrate, color and surface requirement.

FAQ About Santoprene 8211-85M350

Q1: What is Santoprene 8211-85M350?

Santoprene 8211-85M350 is a colorable automotive interior TPV from Celanese designed for molded skins and visible interior surfaces.

Q2: What is the hardness of Santoprene 8211-85M350?

The current published typical value is approximately 86 Shore A.

Q3: Is Santoprene 8211-85M350 a standard 8211 high-flow grade?

It has high-flow processing characteristics, but it is a specialized M350 automotive interior grade with improved surface durability.

Q4: What is the tensile strength?

The published tensile stress at break is approximately 8.8 MPa.

Q5: What is the elongation at break?

The current published value is approximately 480%.

Q6: Is Santoprene 8211-85M350 scratch resistant?

Yes. Celanese specifically identifies improved scratch and mar resistance for this automotive interior grade.

Q7: Does Santoprene 8211-85M350 have good abrasion resistance?

Yes. Celanese’s Product Finder specifically lists improved abrasion resistance.

Q8: Is Santoprene 8211-85M350 low gloss?

It is designed for low-gloss automotive interior surface applications.

Q9: Is Santoprene 8211-85M350 colorable?

Yes. It is supplied in a Natural / easy-coloring formulation.

Q10: Is it suitable for automotive door panels?

Yes. Automotive door-panel skins are a key application direction for this grade.

Q11: Can it be used for center consoles?

Yes. Center-console surfaces are another relevant automotive interior application.

Q12: Can Santoprene 8211-85M350 be molded over PP?

Yes. It was developed for interior skin applications over selected rigid polypropylene substrates. Final interfacial performance should be validated with the actual PP formulation.

Q13: Is Santoprene 8211-85M350 suitable for 2K molding?

Yes. Multi-component injection molding is an important processing route for integrated PP/TPV interior designs.

Q14: What melt temperature is recommended?

A grade-specific starting range is approximately 190–215°C, with about 200°C optimum.

Q15: What mold temperature is recommended?

A useful starting range is approximately 20–50°C, with about 35°C optimum.

Q16: What is the main advantage of Santoprene 8211-85M350?

Its biggest advantage is the combination of 86A hardness + high flow + colorability + low gloss + low emissions + improved scratch, mar and abrasion resistance for automotive interior surfaces.

Request Santoprene 8211-85M350 Price & Technical Support

For pricing, availability or technical support for Santoprene 8211-85M350, please provide:

• Required quantity
• Destination country or port
• Automotive interior application
• Door panel / center console / trim application
• PP substrate grade
• Required color
• Required gloss level
• Surface texture requirement
• Scratch requirement
• Mar-resistance requirement
• Abrasion requirement
• Fogging or odor requirement
• Skin thickness
• Single-shot or multi-component molding
• TDS / SDS requirement
• COA requirement
• Sample requirement, if applicable

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