Industrial hot wedge welding
Often paired with industrial hot air welding technology, hot wedge welding reduces costs, improves efficiency and increases overall product quality. Both mend together thermoplastic materials to create airtight and watertight seams, as well as curved and straight seams, to create strong, durable products.
While industrial hot wedge welding provides manufacturers with undeniable benefits, one application may work better than the other. To help you decide whether it’s time to invest in a hot wedge welding solution, we’ve outlined key benefits, applications and more below.
In this guide:
Hot wedge welding joins two layers of thermoplastic fabric or film with heat and pressure, without thread, needle holes, or adhesives. It happens in three steps:
Because the heat comes from direct contact rather than moving air, hot wedge welding delivers steady heat and runs quietly. Seam quality depends on three settings working together: wedge temperature, travel speed, and roller pressure. See how temperature, speed, and pressure affect PP and PE seams.
Industrial hot wedge welding technology offers specific benefits, dependent on each application. However, this technology is designed to increase production speed, enhance quality and improve overall consistency of products, specifically those that require a long, straight seam.
Consider the following benefits of an industrial hot wedge welding solution
Industrial hot wedge technology is often used to create a product made of films, coated materials, laminated materials and/or in need of a long, straight seam. Products that benefit from hot wedge technology range in size and thickness, but all have the same goal in mind: sturdy and long-lasting materials.
Products that often benefit the most from using hot wedge welding technology are:
When evaluating your welding needs, it’s also crucial to determine if your materials are weldable using hot wedge welding technology. Industrial thermoplastic fabrics and films are typically ideal for hot wedge welding, including:
Hot wedge welding is generally not suitable for nonwoven geotextiles. For pond, landfill, and containment liners, see hot wedge welding for geomembranes and liners.
Here is how hot wedge welding compares with other ways to join industrial fabrics:
| Method | Strengths | Limits |
|---|---|---|
| Sewing | Familiar, low upfront cost | Needle holes can leak, and thread wears over time |
| Adhesive bonding | Works on complex shapes | Curing time slows production |
| RF welding | Complex patterns and selective bonding in PVC and polyurethane | Only RF-suitable materials; higher equipment cost |
| Hot wedge welding | Fast, airtight, watertight seams; cost-effective for long, straight seams and large-format materials | Needs welding equipment; best suited to straight seams |
Choosing between the two most common heat welding methods? Compare hot wedge vs. hot air welding.
Finding the right industrial hot wedge solution will depend on a variety of factors, such as materials, existing processes and current equipment. When vetting your available technology options, work closely with an experienced industrial welding expert to meet your goals and customize your solution.
Consider the following technology options during your vetting process:
When evaluating technology options, also ask yourself and your manufacturing partner the following questions:
Interested in learning more about hot wedge welding solutions? Speak with a Miller Weldmaster expert for more information about the best system for your application.