• 28.01.2022

Sealing and fixing of vacuum bags in various types of vacuum forming technology

For sealing and fastening vacuum bags (from various types of vacuum films) in the technology of various types of vacuum forming (oven and autoclave forming, vacuum infusion, vacuuming), Abris-A LB sealing tape (bundle) is used.

Basic technological scheme

Fig.1 Furnace moulding	Fig.2 Autoclave molding
	Symbols: substrate (metal, fiberglass, carbon fiber); sealing tape (harness) Abris-A-LB; vacuum bag made of vacuum film; matrix; detail; auxiliary fabric; resin feed strip; resin distribution grid
Fig.3 Vacuum infusion

Basic properties of the sealing material Abris-A

* the composition of materials Abris-A can be selected based on the technological modes of molding.

Material advantages

• reliable for sealing vacuum bags in oven and autoclave molding;
• maximum application temperature up to 205 °С;
• easy to apply due to self-adhesive properties;
• has excellent adhesion to metal, polyamide film and other materials;
• at the end of the forming process, the tape is easily removed without remaining on the tooling, without requiring the use of mechanical scrapers and solvents;
• when molding parts in the aviation industry;
• when molding glass in the automotive industry;
• when molding parts of complex configuration in other areas of production.

Application technology

1. The work surface must be cleaned before applying the tape. To remove dirt, wipe the surface with a cloth moistened with solvent (acetone) and air dry for (8 ± 2) minutes. The degreasing zone should be 10-20 mm on each side higher than the boundaries of the tape application. Personal protective equipment is not required when using Abris-A tape.
2. Place the tape on the cleaned and degreased surface with release paper outward along the perimeter of the rig. Then remove the release paper, attach the vacuum foil to the sealing tape to form the necessary folds and roll the vacuum foil around the perimeter of the rig. The entire vacuum forming process will depend on the thoroughness of the installation.
3. At the end of the process, remove the tape from the tooling after it has cooled to room temperature; if necessary, use a gasoline range solvent for cleaning.

Materials used:

Sealing tape Abris A-LBfurn

Tapes Packaging: rolls in a corrugated cardboard box
TU: 2513-002-43008408-98 
Sealant in the form of self-adhesive tape, which is covered on both sides with anti-adhesive material. Dimensions: 15mmx3mmx10m; 13mmx10m.

Sealing tape Abris A-LBaut

Tapes Packaging: rolls in a corrugated cardboard box
TU: 2513-002-43008408-98 
Sealant in the form of self-adhesive tape, which is covered on both sides with anti-adhesive material. Dimensions: 15mmx3mmx10m; 13mmx10m.