Refillable applicator marker for bonding primer

      What is a bonding primer applicator felt pen?

A primer applicator pen is a manual application system used to precisely deposit a liquid primer during the pretreatment of low surface energy substrates (the primer increases the substrate's surface energy to optimize bonding).

Primer applicator felts are generally more convenient and easier to use than traditional brushes or rollers. They are often more manageable, allowing for a more uniform and precise application of the solution.

This type of manual applicator consists of a refillable bottle to be filled with liquid and a replaceable felt head. The marker's valve can be equipped with a pumping system to direct the liquid to the felt head.

      Advantages of the primer applicator pen

• Unlike other primer application solutions (rollers, sponges, pads, brushes, sprays…), using a marker prevents the liquid from evaporating between applications and minimizes user inhalation of harmful solvents.

• In high-production environments, the primer application felt allows for even application of just the right amount of product, avoiding excess and waste.

• The easy grip of the applicator pen allows for a convenient, precise application of your adhesion promoter.

• Applicators help save time and costs by improving productivity, operator safety, and environmental protection, while reducing the need for masking surfaces and cleaning work areas.

      How to choose your primer applicator head

The tips or felt heads are usually made from a mix of natural and/or synthetic fibers.

There is a wide variety of applicator tips with different shapes, sizes, or heights, tailored to specific industrial needs:

• Stable application

• Application in obstructed or confined areas around the substrate

• Application on hard-to-reach areas

• Drip-proof system

Brush applicators:

Ideal for applying primer on uneven or hard-to-reach surfaces. These applicators can be used for coating surfaces in metal, plastic, and wood with ease.

Channel applicators:

A channel applicator is the best choice for coating the interior surfaces of metal, plastic, and rubber channels. Many applicators are available to meet different shape, size, and material requirements.

Flat applicators:

For single-surface applications, the flat applicator distributes the product with a clean edge and precise repeatability. Flat applicators can be ordered with an edge guide to match specific application widths and fluid viscosity.

Round applicators:

Perfect for single-surface applications where no orientation is required, the round applicator dispenses a wide range of fluid viscosities with clean edges and precise repeatability.

Wrap-around applicators:

For multi-surface applications, the wrap-around applicator ensures clean edges and precise repeatability. The stop system is ideal for coating one or two sides and an edge in a single pass.

      What types of reservoir bottles are available?

Adezif offers high-density polyethylene (HDPE) and low-density polyethylene (LDPE) bottles:

• HDPE bottles are recommended to prevent over-application of low-viscosity fluids.

• LDPE bottles are used to ergonomically increase flow when applying thicker fluids.

Note: The reservoir should not be filled to the top to avoid compressing the liquid and ensure proper flow to the felt head.

      Which liquids are compatible with the applicator pen?

Our pens are specifically designed for the application of adhesion promoters, activators, lubricants, or low-viscosity fluids (from 0 to 200 centipoise).

Primer applicator felts can also be used to apply fluid acrylic paint or water- or solvent-based fluid inks.

In most cases, the applicators are resistant to common chemicals and solvents.

Please consult our technical experts to ensure compatibility with your specific application.

      Usage precautions

A primer applicator pen is purchased empty (without liquid); it must be refilled with the primer of your choice.

Adhesion promoters should not remain in the pen for more than one day.

The lifespan of applicators varies based on several factors, including:

• The type and material of the applicator

• The product applied

• The frequency of use

• The substrate on which the product is applied

However, for most applications, customers typically achieve applicator lifespans of between two to eight hours.

Replacing the felt tip

The felt tip must be replaced regularly. Repeated use in production lines, drying of chemicals on the applicator, and contamination from dirt are the most common causes of wear.

If cleaned properly after use, such as with isopropyl alcohol, it is advisable to replace the tips 1 to 3 times per day and not to exceed one day of use.

The replacement frequency may vary depending on climate and manufacturing conditions.

Replacing the reservoir tube

The reservoir tube should also be replaced regularly. The frequency depends on the nature of the chemical and the use process.

The wear point of the tubing is located at the attachment point on the head. The bottle's lifespan depends on the rotations per minute (RPM) over time. For example, a high-speed setting with frequent use may require daily tube replacement. If the RPM is low and the pump is rarely used, a tube may last several days or even a week.

We recommend a daily tip replacement and a monthly tube replacement at minimum.

      Other primer application solutions

• Brush, sponge, pad: Not recommended for fragile surfaces. If the surface contains dirt or dust, these will transfer to the tool. Applicator pads are convenient for coating hard-to-reach areas.

• Roller: Similar to the above. It can be convenient for large flat surfaces but should be avoided on uneven surfaces, as hollows may not be fully coated.

• Spray (aerosol): Useful for quickly applying primer to large surfaces, allowing for no contact with the surface, but does not guarantee a uniform and controlled application.