Heat N' Seal Permanent Backing

Gunold Heat-seal, or BSN film, is a special film that allows an embroiderer to obtain a permanent bond of appliqués, embroideries, patches, and emblems onto almost any fabric. Applied by a household iron or heat press, it supplies a permanent bond, including edges, borders and seams. For decades it’s been one of our most popular items.
 
BSN™ is available in two different versions: one washable up to 104° F (for delicates) and one washable up to 203° F (for industrial applications).

Instructions for Use:

Step 1. Coating embroidery patterns
 
Iron the base fabric prior to the BSN application. Fabric finishes will vaporize and you’ll achieve a better base bond
Place Heat N Seal onto the reverse side of the embroidery pattern so the protective paper will be preserved. Heat n Seal is then welded onto the embroidery pattern using a standard ironing press.
 
Type, Setting, Temperature, Pressure, Period
  • J (I)-Type appr. 275°F medium pressure about 5 Sec.
  • H-Type appr. 220°F medium pressure about 5 Sec.
Period is when using an ironing press. However, type H can be ironed with a standard iron (allow appr. 10 to 15 seconds under slight pressure).
 
To achieve a durable adhesion, the base material must be ironed - prior to the application of Heat N Seal.
 
Do not apply too high a temperature or too high a pressure when coating the embroidery patterns. The foil should only be "tacked on" and should not penetrate too deeply into the underthread and carrier cloth. This allows a sufficient quantity of foil left on the reverse side of the embroidery pattern when fixing it to the garment later.
 
After coating, remove the silicone paper and cut or punch out the patterns. They’re now ready to be fixed.
 
Step 2. Permanently adhere the coated embroidery pattern from step #1 onto the fabric or garment using a similar press

Type, Setting, Temperature, Pressure, Period
  • J (I)-Type appr. 275°F medium pressure about 5 Sec.
  • H-Type appr. 220°F medium pressure about 5 Sec.
All values stated are averages and have to be adapted to the thickness and the heat carrying capacity of the specific cloth. You may also vary temperatures and period. A rise in temperature will result in a shorter period required.
 
Step 3. Post-Production Washing Tests

Full adhesiveness is reached after 48 hours, complete wash tests after this period.

Technical Information

Material: 100% co-polyamid:
 
Type J (I)- for use with a heat press
- suitable for industrial garments, washable up to 203° F
- can only be applied with a heat press
- strength: 73 μ, 80 g/m2
- available sizes: 10.5 inches x 110 yards / 21 inches x 110 yards / 21 inches x 22 yards
BSN Type H - for use with a household iron:
 
- suitable for delicates, washable up to 104° F
- application also possible with a household iron
- strength: 55 μ, 60 g/m2
- available sizes: 10.5 inches x 110 yards / 21 inches x 110 yards / 21 inches x 22 yards