This FAQ (frequently asked questions) page can be used as a reference for the most common questions we have received from other customers when using Clearweld. If you have any questions not listed on this page, please Contact Us and we will be happy to provide the information you need.

Most types of thermoplastics can be laser welded, Clearweld offers different formulations for higher melt temperature plastics as well as plastics with different dyne levels.

Clearweld is designed to absorb NIR laser light at 900 – 1100 nm. Common NIR laser types are diode, Nd:YAG and Fiber. Higher wavelengths such as 10,500 nm CO2 lasers, will not work with Clearweld.

Also – keep in mind the spot size and wattage of your laser, as that will determine the optimal speed for welding. To determine what weld speeds can be achieved using Clearweld, please review our Laser welding Parameters Guide.

The product you use will depend on whether you are using a Clearweld solution or Clearweld resin.

Clearweld solution can be applied as a coating to assist with welding parts. Depending on the product chosen, the part will weld colorless or have a slight green hue.

Clearweld resin is an additive that can be compounded with a thermoplastic material. This is useful when you use Clearweld throughout an injection molded part, rather than only on the surface. We recommend loading tests to ensure the part is reliably weldable while maintaining an acceptable color.

Laser welded parts are as strong as parts welded through other methods, in some cases stronger. When welded correctly, the part should have the same tensile strength as the natural material.

Achieving a uniform coating of Clearweld is very important. If the coating is non-uniform, hazing or crazing of the material can occur due to areas of high and low Clearweld content.

In some cases, non-uniform coating can lead to burn spots or poor welds. To achieve a uniform application, ensure that your coating system is adequate,  See our Distribution and Equipment Page for more information on equipment.

If your part has low dyne levels, we recommend pre-treatment of the film through corona, plasma or flame processes.

Clearweld can be purchased worldwide – Contact Us for information on Clearweld products and distribution methods. 

Our Equipment and Compounders page lists compounding companies that have worked with Clearweld in the past. You can also Contact Us and we can direct you to a compounder that can accommodate your needs.

If you need a specialty product, Contact Us and we will work with you to find a Clearweld product for your specific application.

The Clearweld 100 series has undergone biocompatibility testing and toxicity testing;  See Biocompatibility Test Results for the 100 Series for a list of tests conducted and the results. The Clearweld 900 series is currently undergoing biocompatibility testing and will be updated when testing is concluded. Clearweld LWA 267 resin additive has undergone dermal toxicity testing. If you would like to learn more, please Contact Us.

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