Doors Windows PVC Welding Release Layers

Unplasticized polyvinyl chloride (uPVC) is an extremely versatile polymer known for its outstanding long-term durability—just one of the reasons it has become such a mainstay in door and window manufacturing. Inherently flame-retardant, lightweight, and weather-proof, uPVC is ideal for external doors and window frames. However, uPVC welding is not without its challenges.

Challenges of uPVC Welding

There is a well-established market for uPVC doors and windows, with increasing numbers of consumers in various global regions drawn to them for their excellent energy efficiency and longevity. Demand like this puts pressure on manufacturers to deliver consistently, and to increasingly upscale. The problem therein is that hot plate welding fixtures require high-performance release layers to prevent the accumulation of waste melt on the work surface, and these layers need to be changed routinely. Higher production outputs translate to quicker rates of release layer degradation, thus higher material wastage plus costs.

The natural solution to this is to use a uPVC welding release layer designed for higher numbers of welding cycles to meet changing demands. Yet approving any change in high-value production workflows represents its own bottleneck. Manufacturers often resort to settling with existing solutions, which could lead to lost business in the future.

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Release Layers for uPVC Welding

The Composite Solutions team has designed a specialized uPVC welding release layer that immediately adds value to hot plate welding workflows. SRF206 Copper is a superior, non-stick release layer that can be installed cheaply, and easily into a range of existing machines.

"We have tried using different release sheets in the past, and when we heard about the new SRF206 Copper product from Saint-Gobain, we were a bit skeptical. As with every trial, we didn’t want it to negatively impact the quality of the profile and our production targets."

"The easy clean and less changeovers sounded good however – so we have used it and are very happy with it. The new sleeves are so easy to clean! The PVC just doesn’t stick to them so we can run the machines for 70% longer before we need to change. We now have less breakdowns and maintenance, so we can focus on production and keeping our customers and management happy."

-Hervé Maindron, Warehouse & Maintenance Manager, LAPEYRE Industries

PTFE Coated Fabrics

VERSIV™ non-stick release, barrier protection, friction control, and dielectric control insulation solutions are used in the food, energy, medical and electronics sectors. They are ideal for manufacturers who want to optimize performance and efficiency in challenging processes and operational environments.

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Silicone Coated Fabrics

Resistant to failure in high-flex applications, Silicone Coated Fabrics are used in belting projects, gasketing material, and silicone release cloths for heat sealing and welding applications. They can also be manufactured with a grippy surface and can be used in direct food contact.

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TCK Coated Aramid

Used in open mesh dryer belt applications and fabrics where high tensile and tear resistance are essential, TCK Coated Aramid is ideal for moist or wet environments. Extremely resistant to strength loss after flex folding and lighter weight styles retain their strength.

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Heavy Belting

The strength and rigidity of this VERSIV™belting fabric make it ideally suited for large belts or those operating in harsh, high-temperature or high-volume environments. Mechanically stable under pressure and thermally stable up to 500˚F (260˚C), it offers great release characteristics. Made up of high-quality PTFE coating on a woven glass fiber substrate, the fabric comes with a range of controlled texture options.

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FEP Welding Films

Fluoropolymer film manufactured from fluorinated ethylene propylene (FEP) resin designed to be a cost-effective solution for adhesive welding tape applications.

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PFA Welding Films

PFA-WF Welding Film is a fluoropolymer film made from perfluoroalkoxy (PFA) resin. This is a cost-effective solution for use in high-temperature applications that do not require high aesthetic or electrical standards – like hot melt adhesive (welding tape).

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