Teflon belts

PTFE is a material belonging to the group of high-performance thermoplastics. We know it as Teflon, Fluon or Tarflen, it is a material resistant to high and low temperatures, which is why it has been used in many industries.

PTFE coating properties

very low coefficient of friction
increased resistance to oil and grease penetration
resistance to UV radiation
excellent thermal conductivity
high tear and tensile strength
they are available in an antistatic version obtained thanks to the carbon content - black belt or non-antistatic honey color belt

and

are good insulators
they are easily washable
they are hydrophobic - they do not absorb water
they are non-flammable
are flexible

Examples of applications of PTFE belts in

Food industry – for contact with products with a high fat content, where anti-adhesive properties are needed (baking food: baking cakes, grilling bacon).

Textile industry - belts for welding layers of fabrics (fusion of fabrics with a stiffening undercoat), belts for printing on fabrics and drying printed fabrics.

Wood industry – for hot welding and laminating (applying laminates to wooden elements and MDF boards, curing resins).

Rubber industry – extrusion of rubber seals for packaging and plastics - in packaging welding machines, production of plastic foams, production of floor coverings.

Packaging and plastics industry – in packaging welding machines, production of plastic foams, production of floor coverings.

Printig industry – mesh belts are used for drying the print, in the antistatic version for curing it with UV rays.

PTFE combined with glass fabric

This material is characterized by:

excellent resistance to high and low temperatures ranging from -150 degrees C to +260 degrees C
excellent chemical resistance
strong electrical resistance
dimensional stability in variable temperature
slippery, non-adherent surface.

Aramid fiber belts coated with PTFE

They are especially used wherever work on small drum diameters is required and where greater mechanical strength is required.

Teflon meshes coated with PTFE

They have high permeability to air or other volatile substances, which is perfect for supporting drying processes. They are available in antistatic and non-antistatic versions.

Available in thicknesses from 40 microns (0.04mm). The mesh size ranges from 1x1mm to 8x8mm.

The most standard meshes are:

2x2mm mesh
4x4mm mesh
8x8mm mesh

If meshes are used, it is important that the conveyor drums are rubberized.

Required minimum drum diameters are 100mm.

Fiberglass belts coated with silicone

If you need an abrasion-resistant coating and one that does not crease, then we offer silicone-coated belts. These belts are heat resistant up to 230°C and have good release properties for sticky products. This coating also has good chemical resistance, however, unlike PTFE, it has a high coefficient of friction and does not have self-lubricating properties.

Belts with a silicone coating also find many applications. Often found as curtains in shrink tunnels.

Guiding belts with PTFE coating

PTFE-coated fiberglass belts should run on roller drums.

The drums should be rubber coated, or at least the drive drum, to increase the coefficient of friction between the belt and the drum and eliminate the possible slippage effect. Drum veneers (also made of glass fiber fabric coated with silicone with a total thickness of g=0.25 mm) that we offer or other methods of covering with a solid rubber or silicone coating are also used for this.

Solid surfaces should be sanded to a smooth surface 3-4mm thick. You can also use silicone hoses with a wall thickness of 3-4 mm and a hardness of 30-40 ShA, applied with compressed air.

The PTFE belt is also guided by elements of equipment, such as metal snaps, ferruled eyelets, silicone profiles or Kevlar cords. When using fasteners or ferruled eyelets, edge reinforcement is used to strengthen the fastening. We also use edge reinforcement to eliminate fraying and strengthen the belt. The reinforcement of the edges can be additionally stitched with Kevlar thread.

Tab. 1 Recommended minimum drum diameters (depending on belt thickness and width).

Belt Thickness [mm]	Widht
	od 6 do 300 mm	od 300 do 750 mm	od 750 do 500 mm	ponad 1500 mm
0,12 -0,25	75	75	100	150
0,25-0,48	75	75	100	150
0,48-0,63	100	150	150	200
0,63-0,76	100	150	200	250

Required tension

In order to obtain the optimal life of PTFE belts, attention should be paid to the correct tension, which is

for solid belts with a closed weave - up to 0.3%,
for mesh belts - up to 0.5%.

Types of PTFE belts connections

They depend on the type of requirements that the belts have to meet. We distinguish mechanical connections with steel or plastic connectors and continuous connections.

Mechanical steel and plastic connections:

ANKER conector