Heat-sealed hook and loop tape carries a hot-melt adhesive film on its back instead of a pressure-sensitive adhesive. The film is laminated to the tape with PUR glue, then melted under heat and pressure so the tape bonds permanently to the substrate — no stitching, no solvent, no liner to peel.
Why a hot-melt film rather than a PSA
A pressure-sensitive adhesive holds by tack and can creep under load or lift at the edge on fabric and foam. A hot-melt film flows into the substrate and sets, giving a bond above 1.5 kgf/cm² that behaves as a permanent joint rather than a removable one. That is the reason this construction is used on seat covers, braces and laminated panels where the tape must not drift over the product's life.
Process window
| Item | Value |
| Film thickness | 0.05 - 0.25 mm |
| Melting point | 90 °C |
| Film hardness | 80A |
| Bonding strength | >1.5 kgf/cm² |
| Service temperature | -40 °C to 80 °C |
| Hot press welding | 0.1 - 0.4 MPa, 120 - 160 °C |
| High-frequency welding | 0.1 - 0.4 MPa, 120 - 150 °C |
| Suitable substrates | Cotton, PU leather, neoprene, fabric |
Tape specification
Size 8 - 1500 mm to order, black / white / custom colour, 100% nylon or nylon-polyester, shear strength ≥11 N/cm², packed 50 yards per roll.
Related products
Loop-only constructions are on heat-sealed nylon loop fabric and heat-sealed polyester loop fabric; for removable bonding instead of permanent, see adhesive-backed nylon loop fabric.
FAQ
Hot press or high-frequency welding? Both work with the same film. Hot press suits flat panels and short runs; high-frequency welding suits thicker laminated stacks and parts that need the heat generated inside the joint. The pressure band is the same for both, only the temperature window differs.
Can the tape be re-positioned after bonding? No. Once the film melts and sets the joint is permanent — that is the difference from a pressure-sensitive product. Trial on an offcut first, because the bond cannot be lifted and re-applied.
Why does a bond sometimes fail at the edge? Usually insufficient pressure rather than insufficient temperature. Below roughly 0.1 MPa the film does not fully wet the substrate, so the edge lifts first. Check platen flatness and dwell time as well as the temperature setting.
What happens above the service temperature? The joint is rated to 80 °C. Above that the film softens and the peel value drops, so for hotter assemblies specify a different adhesive system rather than pressing the same tape harder.
