Home / Applications / Bonding Plastics and Dissimilar Substrates

Bonding Plastics and Dissimilar Substrates

Solvent-free adhesive bonding (joining) of plastics with light curable adhesives can vary from a relatively simple process to something that is extremely challenging. Variables such as component configuration, molding humidity, surface energy, light transmission, and operating environment all influence which adhesive and bonding process best suits the application. On occasion, additional processes must be incorporated to mitigate some of these variables. For example, the bonding of plastics with low surface energy may require a pre-treatment process using plasma or corona discharge. Increasing surface energy improves the substrate’s “wettability”, which can dramatically improve adhesive bond strength.

The pioneering adhesive formulators at Tangent Industries have found methods to create more robust adhesives that possess greater cohesive strength with improved adhesion to a broader array of plastic substrates. Tangent’s expertise in light curable adhesives has led to the development of much desired soft, flexible adhesives that can be cured under low intensity UV and UV/Visible light. Despite using lower light intensity, Tangent’s adhesives fully cure in seconds, and exhibit dry, tack-free surfaces. These low intensity curable adhesives are part of Tangent’s LEDcure product line.

Tangent’s adhesives for plastic bonding can be cured with UV, UV/Visible, or only Visible light wavelengths. High strength bonds are achieved with a wide variety of substrates, including combinations of polycarbonate, acrylic, ABS, polyurethane, polyethylene, stainless steel, and glass. They are well suited for assembling consumer appliances and electronics, screens and displays, product packaging, and a host of other applications involving combinations of plastics, metals and glass.

The following table provides a quick summary of our selection of light curable adhesives best suited for plastics and dissimilar materials assembly. In the event that these standard products do not satisfactorily address your performance requirements, Tangent will investigate other solutions that include adhesive development specifically tailored to the complexity of your application.

Product Number Suitable Applications Viscosity cP mPa Shore Durometer 24 Hour Water Absorbtion LEDcure Bondable Substrates Comments/Features Request
TDS button TDS
Sample button Sample
4641 bonding plastics with multiple dissimilar materials 1000-2500 D25-35 < 1.0% yes plastics, ceramic, glass,stainless steel UV/Visible cure, flexible, high elongation, tack-free surface Request sample button TDS button
4731 bonding plastics with multiple dissimilar materials 900–1500 D35-50 < 1.0% yes most plastics, ceramic, glass, stainless steel UV/Visible cure, clear, tack-free surface, suitable for medical device assembly Request sample button TDS button
5140 bonding/laminating flexible materials and those with differing CTE values 250-500 A45-65 < 1.0% yes wide range of plastics, ceramic, glass,stainless steel UV/Visible cure, extremely soft, highly flexible, tack-free surface, clear, suitable for medical device assembly Request sample button TDS button
70001 bonding or sealing acrylic displays 50-90 D70-90 3.0% Yes PMMA, PC, styrene, stainless steel UV/Visible light curable, hard, tack-free surface, wicking viscosity, moisture resistant Request sample button TDS button
70001-VT bonding or sealing acrylic displays 8,000-16,000 D70-90 3.0% Yes PMMA, PC, styrene, stainless steel UV/Visible light curable, hard, tack-free surface, high viscosity for gap-filling, moisture resistant Request sample button TDS button
70012 bonding or forming a seal between surfaces 500-900 D25-35 < 1.0% yes PU, PVC, other plastics, stainless steel, ceramic UV/Visible cure, soft, flexible, high elogation, soft, waxy surface Request sample button TDS button
7041 needle/syringe assembly 50-150 D70-80 < 3.0% yes stainless steel, polycarbonate, PVC, treated polypropylene/HDPE UV/Visible cure, low intensity curable, clear, moisture resistant, generates highest tensile strength with LED curing equipment, tack-free Request sample button TDS button
7090-V-HS bonding/potting rigid plastics 10-150 D80-90 < 1.0% yes PC, PVC, polyester, other rigid plastics UV/Visible cure, secondary thermal cure, low intensity curable, wicking grade viscosity, withstands autoclaving, very hard, clear, suitable for medical device assembly Request sample button TDS button
7173-V bonding PVC and polyethylene components 200-300 D70-79 < 4.0% yes PVC, PC, other plastics UV/Visible cure, best for highly plasticized PVC, tack-free surface, suitable for medical device assembly Request sample button TDS button
7200-VF bonding combinations or rigid and flexible plastic 1000-2000 A60-80 < 10.0% yes PVC, PC, polyester, other plastics UV/Visible cure, low intensity curable, high peel strength, soft, flexible, fluorescing, resitant to salt spray and thermal cycling Request sample button TDS button
7551 bonding rigid plastics 1300-2000 D80-90 < 1.0% yes PC, PVC, styrene, some metals UV/Visible cure, low intensity curable, clear and very hard, highly resistant to yellowing and moisture Request sample button TDS button
7551-VF bonding rigid plastics 1300-2000 D80-90 < 1.0% yes PC, PVC, other plastics UV/Visible cure, low intensity curable, tack-free surface, fluorescing, suitable for medical device assembly Request sample button TDS button
7555-VC bonding or coating rigid plastics 1300-2000 D80-90 < 1.0% yes PVC,PC, other plastic UV/Visible cure, low intensity curable, modified for better wetting, very hard, tack-free Request sample button TDS button
7631 bonding or sealing acrylic displays 100-300 D70-90 < 9.0% yes PMMA, PC, other plastics UV/Visible cure, low intensity curable,high tensile strength, low viscosity for capillary flow Request sample button TDS button
7989-V reservoir assembly/plastics bonding 3000-5000 D45-55 < 5.0% yes PC, ABS, PVC, polyester UV/Visible cure, clear, moisture resistant, flexible, tack-free, suitable for medical device assembly Request sample button TDS button
8400 bonding/laminating of flexible plastics 100-200 D40-50 < 2.0% no PE, Mylar, PVC, PC, polyester, other plastics, and stainless UV cure, very flexible, clear, excellent for strain relief and lamination, high peel strength, UV/Visible cure version available, suitable for medical device assembly Request sample button TDS button

*Note: viscosity variations are typically available, or can be formulated, for all listed products. Please inquire with Tangent Applications Engineering for viscosity ranges not shown in the table.
**Note: modifications can be made to most products in order to meet unique performance requirements. Adding fluorescing properties, color, and secondary curing mechanisms are typical examples of minor modifications. Please contact Tangent Applications Engineering to discuss your specific requirements.

Contact Tangent Industries for more info.