General Release Applications

The simplest and one of the most effective ways to demonstrate the benefits of PTFE glass fabrics, is to use the material as a baking sheet at home in the kitchen, when cooking something that normally creates sticking  problems. Cleaning  up afterwards is a thing of the past. Many bakers use GORTEF TEFLON COATED GLASS FABRICS in this way. Best results are achieved with

• GORTEF 307 is used when manufacturing P.V.C. tiles.
• Porous GORTEF 408.08 and GORTEF 108.08 are used in the manufacture of Aerospace and Racing car composites during the bag moulding and autoclave operations
• GORTEF 116.15 and GORTEF 828.25 are used to cover platens when moulding mica.
• GORTEF 108.08 is used to line trays processing rubber crumb.
• GORTEF 306 cut into circular discs is used as release sheets during the curing the process in the manufacture of abrasives and grinding wheels.

The  above  applications  are  basically  batch  style  production. When we mechanise  the  process and  introduce a conveyor belt we can identify many uses for GORTEF belting products that are dependent on good release properties:

• Manufacture of polymer / rubber backed carped and underlay.
• Curing of polyurethane sheet – subsequently diced into injection moulding pellets.
• Cooling of polyether sheet  GORTEF  1584.
• Curing of paint chip  GORTEF 828.25

Further significant end use of GORTEF TEFLON COATED GLASS FABRICS demonstrating good release and high temperature stability is found in welding plastics.

When thermoplastic  materials are heated above their  melting  point they become hot  sticky mobile  liquids and in this  condition, if two pieces are pressed together and cooled they will be permanently bonded.

Plastics, uPVC windows and doors are manufactured in this way. Mitered pieces of uPVC extruded section are heated by pressing them under controlled conditions against an electrically heated platen, that is covered with PTFE glass fabric. When uPVC melts, the platen  is removed, the two sections are pressed together and a joint is effected.

The PTFE glass fabric overcomes any problem of build up of uPVC on the platen, and spoilage is low provided the fabric is replaced on a daily basis. Some customers seem to prefer GORTEF 116,15 but GORTEF 316.13 are also widely used. We  improved specific product for uPVC industry. This is GORTEF 216.15SP and also GORTEF 216.15 SP-AD is for adhesive practice.

Applications similar to this exist in the manufacture of  plastic sanitary ware and the welding of  plastic pipes and sheets.