Santoprene 8211-55B100 TPV | Bondable TPV for PC ABS & PP

描述

Santoprene 8211-55B100 is a soft, Natural and colorable thermoplastic vulcanizate from Celanese specially developed for hard/soft overmolding applications requiring direct adhesion between TPV and selected rigid thermoplastics.

Unlike a conventional general-purpose TPV, the defining feature of Santoprene 8211-55B100 is its B100 bonding technology.

Celanese currently lists the grade with:

• 53 Shore A hardness
• Natural appearance
• 600% elongation at break
• Injection-molding capability
• Special bonding capability
• Adhesion to PC, styrenics and PP

Celanese also identifies B100 grades as capable of bonding to engineering thermoplastics such as PC, ABS and PS, while B100 formulations additionally support PP bonding.

This makes Santoprene 8211-55B100 particularly useful for products that combine:

rigid substrate + flexible soft-touch surface

in a single molded component.

Typical examples include:

• Rigid PC housing + soft TPV grip
• ABS component + flexible sealing edge
• PP structure + soft contact surface
• PC/ABS housing + impact-protection zone
• Rigid control surface + tactile elastomer layer

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 8211-55B100

What Makes the B100 Technology Important?

The B100 designation is the key part of Santoprene 8211-55B100.

This material is not simply selected according to hardness.

Its main purpose is to solve a common multi-material design problem:

How can a soft TPV be molded directly onto a rigid engineering plastic without relying only on mechanical locking or secondary adhesive?

The B100 formulation is engineered to improve interfacial adhesion between Santoprene TPV and selected thermoplastic substrates.

This can allow a designer to combine:

• Structural rigidity
• Soft tactile feel
• Flexible sealing
• Impact protection
• Vibration isolation
• Ergonomic grip

within one finished molded component.

Bonding to PC

Polycarbonate is commonly used where components require:

• High toughness
• Dimensional stability
• Impact resistance
• Good appearance

Santoprene 8211-55B100 can be used as a soft overmolding material on selected PC grades.

Typical PC + TPV designs may include:

• Electronic housings
• Tool components
• Control surfaces
• Protective edges
• Hand-contact zones

Actual adhesion should be confirmed using the exact PC formulation.

Bonding to ABS

ABS is widely used in:

• Consumer electronics
• Appliances
• Automotive interiors
• Handheld equipment
• Industrial housings

Santoprene 8211-55B100 is specifically positioned for bonding to ABS-type engineering thermoplastics.

This makes it useful for parts requiring:

• Soft grips
• Flexible edges
• Integrated gaskets
• Protective surfaces
• Tactile contact zones

PC/ABS Overmolding

PC/ABS blends are common in durable housings and automotive components.

Celanese’s specialty application material identifies the B100 grade as bondable to engineering thermoplastics including PC, ABS, PC/ABS, ASA and PMMA.

This allows Santoprene 8211-55B100 to be evaluated for:

• Instrument housings
• Consumer electronics
• Automotive controls
• Appliance interfaces
• Protective soft-touch surfaces

PP Bonding – An Important B100 Advantage

One of the most valuable characteristics of the B100 family is PP bonding capability.

Celanese explicitly states that B100 grades can bond to PP in addition to selected engineering thermoplastics.

This is especially useful because polypropylene is extensively used in:

• Automotive parts
• Appliances
• Consumer products
• Household components
• Industrial housings

Possible PP + Santoprene 8211-55B100 designs include:

• PP handle + soft grip
• PP housing + flexible sealing edge
• PP structural component + tactile surface
• PP insert + elastomeric interface

The actual PP formulation remains important because fillers, lubricants and mold-release additives can affect adhesion.

Natural & Colorable Bonding Grade

Santoprene 8211-55B100 is supplied in Natural form.

This is a major advantage for visible hard/soft components because the elastomer does not have to remain black.

Possible finished colors include:

• White
• Light gray
• Dark gray
• Blue
• Red
• Green
• Beige
• Brand-specific colors

This makes the grade particularly useful for consumer applications where appearance is part of the product design.

Soft-Touch Applications

At approximately 53 Shore A, Santoprene 8211-55B100 provides a distinctly soft tactile surface.

This is suitable for products where the user directly touches the elastomer.

Typical benefits include:

• Comfortable grip
• Reduced slipperiness
• Softer edge feel
• Improved tactile differentiation
• Impact cushioning
• Better ergonomic response

Potential products include:

• Hand tools
• Controls
• Handles
• Electronic devices
• Consumer products
• Appliance components

Typical Applications for Santoprene 8211-55B100

Typical Properties of Santoprene 8211-55B100

Physical Properties

The current Celanese Product Finder lists Santoprene 8211-55B100 at approximately 53 Shore A, despite the 55 contained in the grade designation.

Mechanical Flexibility

Elongation at Break

Current Celanese portfolio data lists approximately:

600% elongation at break

for Santoprene 8211-55B100.

This high elongation is useful in overmolded parts because the soft section may need to:

• Stretch
• Bend
• Compress
• Wrap around rigid geometry
• Absorb impact
• Deform during assembly

while remaining bonded to the hard substrate.

Why High Elongation Matters in Overmolding

Bonding performance alone is not sufficient for a good hard/soft component.

The elastomer also needs to tolerate deformation without cracking or tearing away from the substrate.

The approximately 600% elongation of Santoprene 8211-55B100 supports designs with:

• Thin soft layers
• Flexible edges
• Raised grip patterns
• Sealing lips
• Local impact zones
• Stretchable interfaces

2K / Two-Shot Molding

Santoprene 8211-55B100 is especially well suited to two-shot molding.

A typical 2K process uses:

1. A rigid substrate molded in the first cavity
2. Transfer or rotation of the mold
3. Injection of Santoprene 8211-55B100 as the second material
4. Formation of a bonded hard/soft component

Potential benefits include:

• Reduced assembly
• No separate adhesive application
• Better part integration
• Cleaner appearance
• Repeatable soft-layer placement
• Automated high-volume production

Insert Molding

The grade can also be used for insert-molding applications.

A previously molded rigid component can be placed inside the tool before Santoprene 8211-55B100 is injected around it.

This process can be useful when:

• The rigid substrate is manufactured separately
• Different resin processing conditions are required
• A two-shot molding machine is unavailable
• Complex rigid inserts are used

Successful bonding depends strongly on processing conditions and substrate preparation.

Substrate Surface Condition

For reliable bonding, the rigid substrate should be:

• Clean
• Dry
• Free from grease
• Free from excessive mold-release residue
• Free from dust
• Free from contamination

Surface contamination can significantly reduce adhesion.

For production qualification, bond strength should always be evaluated using the actual commercial substrate grade.

Why Exact Substrate Grade Matters

Two plastics with the same polymer name do not necessarily provide the same bonding performance.

For example, different ABS grades may contain different:

• Lubricants
• Mold-release agents
• Impact modifiers
• Flame retardants
• Fillers
• UV stabilizers

The same applies to:

• PC
• PC/ABS
• PP
• PMMA
• ASA

Therefore, Santoprene 8211-55B100 should be tested with the exact substrate resin intended for production.

Surface Appearance

B100 specialty bonding grades are also intended for applications where good finished-part appearance is important.

This matters in:

• Consumer electronics
• Automotive interiors
• Appliances
• Handheld products

Important molding factors include:

• Flow direction
• Gate location
• Mold texture
• Injection speed
• Interface design
• Color masterbatch quality

A well-designed process can provide a clean transition between the rigid and soft materials.

Mechanical Interlocking

Even when direct adhesion is available, part designers can improve robustness by incorporating mechanical locking features.

Examples include:

• Through-holes
• Undercuts
• Grooves
• Slots
• Retaining ribs
• Wrap-around geometry

This is particularly useful in areas exposed to high peel loads.

Chemical adhesion and mechanical interlocking can work together to improve finished-part durability.

Peel Load vs Shear Load

Overmolded interfaces generally perform differently depending on how the load is applied.

Designs dominated by shear loading are often more favorable than designs that continuously peel the elastomer away from the substrate edge.

Part geometry should therefore minimize concentrated peel forces when possible.

Useful approaches include:

• Larger bond area
• Rounded transitions
• Wrapped edges
• Mechanical locking
• Reduced edge peeling

Flammability

Celanese application information identifies Santoprene 8211-55B100 as UL 94 HB.

This means it should be positioned as an HB material, not as a V-0 flame-retardant TPV.

For electrical applications requiring a specific current recognition, verify the exact finished construction and thickness requirements.

5G & Electronics Applications

Celanese has also included Santoprene 8211-55B100 in material guidance for connectivity applications.

In that guidance, the grade is identified as:

• UL 94 HB
• Bondable to PP
• Bondable to engineering thermoplastics including PC, ABS, PC/ABS, ASA and PMMA

This makes the grade relevant to selected electronic and connectivity components requiring:

• Soft protective surfaces
• Flexible interfaces
• Integrated sealing
• Impact protection
• Multi-material construction

Why Choose Santoprene 8211-55B100?

The strongest reason to select Santoprene 8211-55B100 is not simply its hardness.

Its value comes from combining:

• 53 Shore A softness
• 600% elongation
• Natural / colorable appearance
• PC bonding
• ABS bonding
• PC/ABS bonding
• Styrenics bonding
• PP bonding
• 2K molding
• Insert molding
• Soft-touch performance
• Good surface appearance
• Thermoplastic processing

For products that need both rigid structural support and an integrated soft elastomeric surface, Santoprene 8211-55B100 is a specialized material option.

Processing Guidelines for Santoprene 8211-55B100

Santoprene 8211-55B100 is particularly suitable for:

• Two-Shot Injection Molding
• Multi-Injection Molding
• Insert Molding
• Conventional Injection Molding
• Selected Coextrusion Designs

For bonding applications, processing should be optimized for the interface rather than only for cavity filling.

Key Processing Factors for Bond Strength

Important variables include:

• TPV melt temperature
• Rigid substrate temperature
• Mold temperature
• Injection speed
• Injection pressure
• Contact pressure
• Gate position
• Bonding area
• Substrate cleanliness
• Residence time

Poor control of any one of these variables can reduce adhesion.

Interface Temperature

The interface must remain warm enough for the B100 material to interact effectively with the rigid substrate.

In two-shot molding, the first-shot substrate often retains heat.

This can improve:

• Surface wetting
• Interfacial contact
• Bond formation

In cold-insert molding, process optimization becomes especially important because the rigid insert has already cooled.

Injection Speed

A sufficiently fast injection speed can help:

• Maintain melt temperature
• Improve surface wetting
• Increase interface contact
• Fill thin soft layers
• Improve appearance

Because Santoprene TPV exhibits shear-thinning behavior, increased shear also reduces apparent viscosity.

Gate Location

The gate should encourage the molten TPV to flow across the substrate surface rather than immediately freeze at the interface.

Good gate design can improve:

• Bond coverage
• Flow balance
• Surface appearance
• Filling of thin regions

For large overmolded areas, flow length and pressure drop should be considered during tool design.

Shear-Dependent Flow

Santoprene 8211-55B100 is a thermoplastic elastomer with shear-dependent melt behavior.

As shear increases:

apparent viscosity decreases.

This helps the material flow into:

• Thin grip layers
• Sealing lips
• Detailed textures
• Narrow channels
• Complex hard/soft geometries

Mold Release Agents

Excessive use of mold-release agents on the rigid substrate should be avoided.

Mold-release residue can act as a barrier between:

Santoprene 8211-55B100 → rigid substrate

and significantly reduce adhesion.

For critical bonding applications, production trials should be conducted without unnecessary surface contaminants.

Coloring Santoprene 8211-55B100

Because the standard grade is Natural, custom colors can be developed.

When selecting masterbatch, evaluate:

• Carrier compatibility
• Pigment loading
• Dispersion
• Thermal stability
• Surface appearance
• Adhesion retention

Color additives can affect interface chemistry, so final bond testing should be performed after the production color formulation has been established.

Coextrusion Possibilities

Bondable TPV can also be considered for selected coextrusion structures where a soft functional material must be integrated with another compatible thermoplastic.

Potential applications include:

• Flexible profile surfaces
• Soft edges
• Protective interfaces
• Functional sealing sections

Exact substrate compatibility and extrusion temperatures should be validated before commercial production.

Related Products

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

Typical product families include:

• Santoprene B100 Bonding Grades
• Santoprene Bondable TPV
• Santoprene Natural Bonding Grades
• Santoprene 2K Overmolding Grades
• Santoprene Insert-Molding Grades
• Santoprene Soft-Touch TPV
• Santoprene PC / ABS Bonding Materials
• Santoprene PP Bonding Materials
• Santoprene Engineering-Thermoplastic Overmolding Grades

View More TPV Thermoplastic Vulcanizates →

Technical Documents for Santoprene 8211-55B100

Need technical documents for Santoprene 8211-55B100?

📧 Email: ruiqingchem@gmail.com

📝 Online form: Contact Us →

Please provide your rigid substrate grade when requesting bonding support.

FAQ About Santoprene 8211-55B100

Q1: What is Santoprene 8211-55B100?

Santoprene 8211-55B100 is a Natural, colorable specialty bonding TPV from Celanese designed for hard/soft overmolding applications.

Q2: What is the hardness of Santoprene 8211-55B100?

The current Celanese Product Finder lists approximately 53 Shore A.

Q3: What does B100 mean in Santoprene 8211-55B100?

B100 identifies a special bonding formulation designed for adhesion to selected engineering thermoplastics and PP.

Q4: What is the elongation at break?

Celanese currently lists approximately 600% elongation at break.

Q5: Is Santoprene 8211-55B100 Natural or Black?

It is Natural / colorable.

Q6: Can Santoprene 8211-55B100 bond to PC?

Yes. PC is one of the explicitly listed substrate families for B100 bonding applications.

Q7: Can it bond to ABS?

Yes. ABS is included among the engineering thermoplastics identified for B100 applications.

Q8: Can Santoprene 8211-55B100 bond to PC/ABS?

Yes. Celanese’s application guidance includes PC/ABS among the engineering thermoplastics associated with this grade.

Q9: Can Santoprene 8211-55B100 bond to PP?

Yes. PP bonding is one of the important features of the B100 family.

Q10: Can it bond to PMMA?

Celanese application guidance includes PMMA among the relevant engineering thermoplastic substrates.

Q11: Is Santoprene 8211-55B100 suitable for 2K molding?

Yes. Two-shot / 2K overmolding is a primary application direction for this type of specialty bonding TPV.

Q12: Can it be used for insert molding?

Yes. It can be evaluated for overmolding onto pre-molded rigid inserts, with final bonding dependent on substrate and processing conditions.

Q13: Is Santoprene 8211-55B100 suitable for soft-touch applications?

Yes. Its approximately 53 Shore A hardness and specialty bonding capability make it well suited to soft-touch hard/soft constructions.

Q14: Is Santoprene 8211-55B100 flame retardant?

It is not a V-0 flame-retardant grade. Celanese application guidance identifies it as UL 94 HB.

Q15: Does every ABS or PC grade give the same adhesion?

No. Adhesion depends on the exact substrate formulation, additives, mold design and processing conditions. Production testing should be performed with the actual rigid resin.

Q16: What is the biggest advantage of Santoprene 8211-55B100?

Its strongest advantage is the combination of soft 53A TPV performance + Natural colorability + 600% elongation + bonding to PC/ABS-type engineering plastics and PP.

Request Santoprene 8211-55B100 Price & Technical Support

For pricing, availability or technical support for Santoprene 8211-55B100, please provide:

• Required quantity
• Destination country or port
• Application
• Rigid substrate material
• Exact substrate grade
• PC / ABS / PC-ABS / PP / PMMA / ASA application
• Two-shot or insert-molding process
• Required color
• Soft-touch requirement
• Bond-strength requirement
• Overmold thickness
• Part geometry
• Surface-texture requirement
• Operating temperature
• TDS / SDS requirement
• Bonding documentation requirement
• COA requirement
• Sample requirement, if applicable

📧 Email: ruiqingchem@gmail.com

📝 Send Inquiry →