19.1 INTRODUCTION

This chapter discusses quality control and the writing and use of specifications that apply to epoxy adhesive systems. These subjects are of interest to both the formulator and the end user.

They are of interest to the formulator as they apply to raw materials and to the final adhesive product. The formulator must understand not only how to control the quality of the adhesive product but also how to use specifications as they relate to raw materials or to the end user or customer.

Similarly, the end user must develop a plan to ensure the consistency and quality of the entire bonding processes. Specifications that are employed by the end user will apply both to the formulated adhesive and to the final bonded assembly that is produced.

Quality control testing processes that are commonly used with epoxy adhesives are discussed in Chap. 20. Tests included are those used by the formulator as well as those employed by the end user of the adhesive system.

19.2 QUALITY CONTROL

Both the formulating of adhesives and bonding with adhesives are complex, multiple-part processes, complete with interacting and sometimes unexpected parameters that may contribute to success or failure of the final product. Thus, it is important that the quality control process consider the entire operation from receipt of materials to final product testing.

A generalized flowchart for the quality control process in formulating epoxy adhesives is shown in Fig. 19.1. A flowchart for controlling the quality of the adhesive bonding process...