This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Adhesion Results of Using IMR in Window Encapsulated RIM Systems
Annotation ability available
Sector:
Language:
English
Abstract
Modular window encapsulation of glass using Polyurethane RIM (Reaction Injection Molding) has been very popular in the automotive industry over the last 10 years. RIM offers many advantages in the design of modular windows including: flexibility to design complex shapes with variable wall thicknesses, molded-in attachment studs for easy assembly, and aerodynamic styling.
The automotive industry is continually looking for new advancements in technology to increase productivity and decrease the costs of processing parts. A processing advancement using IMR (Internal Mold Release) was introduced into RIM bumper fascia in 1982 with great success. To this day, IMR is an important component for automotive fascia applications. Likewise, window encapsulation with the use of IMR in RIM systems has become a key component in reducing molding cost for automotive windows.
The introduction of IMR in RIM for Window Encapsulation offers many potential benefits to the molders of these parts. The advantages include increased molding efficiency for RIM window encapsulation by reducing the need for spraying external mold release and also reducing the mold cleaning time. The use of IMR in the window encapsulation industry has already enhanced the productivity of the RIM molding process.
Before IMR could be used in a new RIM formulation for a production application, a major question was raised as to whether the use of IMR technology would interfere with the adhesion of the RIM material to the glass. This paper will explain the adhesion testing and data analysis techniques used for window encapsulation RIM systems and present results for RIM systems with and without IMR. Proof of strong adhesion was required before the automotive industry would accept this new component in window encapsulation formulations. Adhesion was tested after exposure to a variety of aging and environmental conditions. The results of the analysis will show that chemical bonding between the primer and the glass does not decrease with the use of IMR.
Recommended Content
Technical Paper | Polyurethane Reaction Injection Moulded (R.I.M.) Modular Windows |
Technical Paper | Some Recent Developments in Bonding RIM Urethane Automotive Modular Glass |
Technical Paper | Advanced Concepts for Modular Glazings |
Topic
Citation
Hillen, J., Suddaby, B., Grönen, J., and Nakamura, M., "Adhesion Results of Using IMR in Window Encapsulated RIM Systems," SAE Technical Paper 950567, 1995, https://doi.org/10.4271/950567.Also In
References
- Carswell R. Kubizne P. J. “Polyurethane RIM Modular Window - A Synergistic Combination of Polymer, Process and Application” SPI 29th Annual Technical/Marketing Conference PU Division Reno, NV Oct. 23-25 1985
- Thompson Thomas N. Suddaby Brian R. “Window Encapsulation with Internal Mold Release RIM Polyurethane” Paper No. 910761 SAE International Congress and Exposition Detroit, MI February 25 March 1 1991
- Cekoric Mark E. Taylor Ronald P. Barrickman Charles E. “Internal Mold Release: The Next Step Forward in RIM Productivity” Paper No. 830488 SAE International Congress and Exposition Detroit, MI February 28 March 4 1983
- Westley Stephen A. “Some Recent Developments in Bonding RIM Urethane Automotive Modular Glass” Paper No. 910756 SAE International Congress and Exposition Detroit, MI February 25 March 1 1991