Application Tips and Troubleshooting for Grade B Film Epoxy Adhesives

Posted by:Bornan Release Date:2026-05-30 Views:310

Resin Designs TechFilm is a product line of high performance, partially cured epoxy adhesive films. These speciality film adhesives are designed to replace two-component liquid epoxy resins, and the benefits of Techfilm include clean, precise bond thicknesses and boundaries, and excellent resistance to high and low temperatures as well as harsh environmental conditions. 

What makes these films different from traditional adhesive coatings? Let's review the unique benefits of TechFilm adhesives and discuss how best to implement their unique application process.

What are film-based adhesives?

TechFilm products can be considered class b adhesives, meaning that they are partially cured in film form, with curing interrupted by subsequent storage, packaging, and transport of the frozen film material. class b epoxy films are superior to epoxies supplied as liquids because of their ability to be applied cleanly and precisely where they are required. Its ability to be die-cut into complex shapes contributes to high precision.

Another significant advantage of Techfilm products is that they can contain thermally or electrically conductive materials as required. Liquid epoxies, on the other hand, can suffer from settling and clogging problems if supplied at such high filler content. Techfilm adhesives can be fully cured in minutes with moderate heat and pressure, whereas similar liquid epoxies can take hours or even days. Our top polymer scientists have engineered this material for superior wetting and bonding on common industrial substrates, including most metals and plastics.

How to Apply TechFilm Adhesives

TechFilm is used in a wide range of applications, including aerospace, automotive and medical. It is also used in the manufacture of electronics, IC packages and other high-tech products. To apply TechFilm products, the following materials are required:

- TechFilm products

- Substrate material

- Pressure Applicators

- Curing oven

After preparing these elements, the application can begin.

4 Steps to Applying TechFilm Film Adhesives

1. Remove TechFilm products from refrigeration. Allow it to return to room temperature.

2. Apply TechFilm product to desired substrate material.

3. Apply pressure to the bonding area using a pressure applicator. The amount of pressure required depends on the thickness of the TechFilm product and the substrate material.

4. Cure the bonded area in an oven at the specified temperature and time.

Pressure Applicator Options:

- Dead weight: one of the best ways to apply pressure to bonded areas. They should be preheated to curing temperature before use. 0.1 psi to 100 psi has been used successfully. Typically, 1-5 psi works best during curing.

- Autoclave Bag Bonding: Autoclave bag bonding is a very effective method of applying pressure and heat to the bonded area. It is the best choice for ensuring a void-free bond. Bonding in an autoclave using self-weight or other methods of applying pressure will also reduce the size of voids.

- Spring Clamps: Spring clamps can provide a constant force during the curing cycle, but they are not as effective as self-weight or autoclave bag bonding methods.

- Screw clamps: Screw clamps are not recommended for applying pressure to the bonded area. As the adhesive flows during the curing process, the force exerted by the screw clamp will decrease.

- Vacuum Bagging: Vacuum bagging is not recommended for curing TechFilm products. The low pressure and high temperatures of a vacuum oven can cause the adhesive to evaporate. This is because the adhesive may not fully wet all surfaces when voids are exposed to vacuum. However, the use of the vacuum bag method during applications where rough surfaces are wetted at 70 to 80°C is very helpful in producing void-free bonds.

Curing Temperature and Time:

Curing temperatures and times for TechFilm products depend on the thickness of the film and substrate material. The manufacturer's instructions should be consulted for specific recommendations.

Troubleshooting TechFilm Adhesive Applications

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