Sika Worldwide

Sika Worldwide

Sika is a globally active company supplying the specialty chemicals markets. It is a leader in processing materials used in sealing, bonding, damping, reinforcing and protecting load-bearing structures in construction (buildings and infrastructure construction) and in industry (vehicle, building component and equipment production). Sika’s product lines feature high-quality concrete admixtures, specialty mortars, sealants and adhesives, damping and reinforcing materials, structural strengthening systems, industrial flooring and membranes. Subsidiaries in more than 70 countries worldwide and approximately 12,900 employees link customers directly to Sika.

www.sika.com

10/2009

Our most current General Sales Conditions shall apply. Please consult the most current local Product Data Sheet prior to any use.

Industry Automotive-Acoustic System

SikaBaffle® and SikaDamp®

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Automotive Product Solution

Engineered Solutions Sika Acoustic System (SikaBaffle®, and SikaDamp®) is a heat reactive, pre-shape molded, extruded and designed die cut part. The full Acoustic System package (thermoplastic and elastomeric products) is optimized to reduce noise propagation through primary body structure from entering into the passenger compartment. The Acoustic System is designed to seal the vehicle body cavities (SikaBaffle®) and to damp (SikaDamp®) the vibration of the body panels resulting in a driving and riding comfort.

The SikaBaffle® is a 3D thermoplastic (molded) or elastomeric (extruded) part designed to seal a body cavity to provide significant increase in vehicle acoustic performance. SikaBaffle® products are developed with various volumetric expansions to seal body cavities to meet OEMs design parameters. It is inserted in the assembly of body structure and expands during electro deposited (E-Coat) oven to seal the body cavity. The high degree of expansion and the three-dimensional design of SikaBaffle® products allow sealing of complex design cavities.

SikaDamp® is a non-curing, lightweight, elastomeric constrained layer damper, SikaDamp®, it is co-extruded with either aluminum foil or a glass cloth carrier for ease of application and production processes.

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Technology Benefits – Engineered NVH solution management – Lightweight – Virtual 3D design – Positive location – Occupant comfort

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Content

Sound Insulation of Body Cavities (Molded Parts)_4

Sound Insulation of Body Cavities (Extruded Parts)_5

Vibration Damping of Body_6 SikaDamp and SikaBaffle Applications ®

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Sound Insulation of Body Cavities Molded Parts Sealing the body cavities contributes to the The molded SikaBaffle® parts can be robotically blocking of the exterior noise from entering into or manually inserted into vehicle cavities such the vehicle compartment resulting in a much as A, B, C, and D pillars. quieter ride.

Design Concept Lightweight carrier and high expansion thermoplastic material designed in 3D shape and with a positive locator (push pin for example) to effectively block or absorb the noise by sealing the body cavities.

Technology Benefits – Lightweight solutions – Complete sealing of the designed cavity – Provides insulation to water, moisture and dust – Superior acoustic performance – Flexible design options through injection molding

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Extruded Parts The extruded SikaBaffle® Acoustic System The extruded SikaBaffle® parts can be robotically products are designed to effectively seal these or manually installed into vehicle cavities such cavities of the vehicle, to block and damp the as A, B, C, and D pillars. exterior noise.

Application Fields

Design Concept Lightweight co-extrusion of an expandable sealant with a self adhesive layer or an integrated mechanical attachment providing positive location to effectively block or absorb the noise by sealing the body cavities.

Technology Benefits – Lightweight solutions – Complete sealing of the designed cavity – Provides insulation to water, moisture and dust – Superior acoustic performance – Unlimited profile options – High and very high expansion – No or low tooling cost

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Vibration Damping of Body SikaDamp® products are non-curing, lightweight elastomeric, constrained layer pre-shaped based technology. SikaDamp ® technology is used to damp the vibration of body panels such as Door, Hood, Roof, Wheel house, or trunk areas. SikaDamp® products are typically with an aluminum foil constraint layer, or co-extruded with a glass cloth for applications and production processes.

Benefits for Automotive Producers

Applications – Doors – Reduces vibration of body panel. – Increases stiffness of panel like door handle – Roof – Floor pan and slam noise. – Quarter panels – Can be die cut into any shapes or sizes. – Can be applied at any point during vehicle – Rear shelf – Dash assembly - Body shop to assembly line. – Wheelhouse – Doors – Oil pan – Valve cover

Technological Benefits – Elastomeric mastic material to reduce body panel vibration – Improves body stiffness – Improves structural noise (i.e. door slam) – Co-extruded with an aluminum foil or a woven cloth for ease of application – Can be applied in body, paint, or final assembly

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Focusing on the Customer Sika Technology Center With the Sika Technology Center (STC), Sika utilizes a highly trained team to ensure the correct integration of parts in the early developmental stages of the vehicle. This team focuses on optimizing the validated solution maximizing the potential savings in terms of weight, cost and performance. CAD/CAE Supported Development During the last decade Sika gained knowhow in the design of reinforcing structures for cars. Sika‘s experienced CAE engineers are equipped to support customers with a variety of commercial software packages for static and dynamic analysis as well as topological opimization.

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Materials Sika Research and Development chemists and engineers have developed materials that offer variable expansion rates and mechanical properties. Materials are designed to fulfil specific customer oven processes and specifications. Sika‘s know-how in both chemistry and CAE ensures in-depth knowledge of material behavior and performance to deliver a cost effective solution.

Acoustic Test Center In our Acoustic Test Center in the USA (Madison Heights, MI) we test our products for acoustic performance. Equipped with a Chassis Dynamometer, a wind-testing rig and an E-coat oven suitable for entire vehicles, we are able to stimulate realistic test conditions.