PTFE Glass Coated Fabric for Copper Clad Laminate(CCL)

////PTFE Glass Coated Fabric for Copper Clad Laminate(CCL)

PTFE Glass Coated Fabric for Copper Clad Laminate(CCL)

PTFE Glass Coated Fabric for Copper Clad Laminate(CCL)

PTFE Glass Coated Fabric is using E-glass fiber (or Kevlar, Nomex) as basic fabric, and impregnated with high quality PTFE (Teflon)(Polytetrafluoroethylene).

PTFE prepreg fabric is used in CCL production, in order for meeting the high frequency request in 5G.


What is Copper Clad Laminate (CCL)?


Copper Clad Laminate(CCL) is a type of basic material of PCB, it is laminated with copper clad on both sides, and reinforced with resin soaked glass fiber fabric.

PTFE Glass Coated Fabric for CCL

PTFE Glass Coated Fabric for CCL


Classification of CCL


Due to the different classification standard, CCL can be classified into many kinds of categories:


 Mechanical rigidity

Rigid CCL or Flex CCL. It depends on the rigidity, while flex CCL is used to make Flexible Printed Circuit board/FPC.


 Insulation material and structure

Organic resin CCL, Ceramic-base CCL, Metal-base CCL



Standard thickness CCL and thin CCL. The standard one is at least 0.5mm thick.

Thickness of copper foil is included in the CCL thickness.


 Reinforcing material

Glass fiber based CCL, paper based CCL, compound CCL


 Applied insulation resin

Epoxy resin CCL and Phenolic CCL.





Prepreg(reinforcing material) for CCL


Prepreg is the reinforcing material for CCL, is made with fiberglass coated with resin.

The common glass fiber fabric for CCL is 106, 1080, 2112, 2116, 1500 and 7628.

And the applied resin is Phenolic resin, epoxy resin, Polyimide resin, Bismaleimide triazine or PTFE Glass Coated Fabric.


Due to the following property of glass fiber cloth, so it is widely used as prepreg material in CCL.

 High intensity

 Heat and fire resistance

 Humidity resistance

 Excellent insulation capability


The quality of prepreg will affect the quality of CCL directly.

Therefore, ESONE pay high attention to the testing and controlling of prepreg quality, which includes the resin content, gel time, volatile content and resin fluidity.


Why use PTFE Glass Coated Fabric for HFPCB production


With the development of 5G communication technology, high frequency printed circuit board is requested.

Because of the following superior property of PTFE Glass Coated Fabric, it is used as reinforcing material in CCL production, which can meet the high request of High frequency printed circuit board(HFPCB).


  Non-stick surface, good release property.
  Good welding property
  Continuous working from -170°C to +260°C
  Dimensional stability
  Good dielectric strength
  Resistance to microwaves, UVs and IRs and HF.
teflon coated fiberglass

Teflon coated fiberglass


Unique request for PTFE coated fabric, PTFE film in CCL production


ESONE is developing custom PTFE Glass Coated Fabric for CCL production, like improving the welding property, promoting the dielectric strength and enhancing the tensile strength (dimensional stability).

And the workshop must be clean, temperature and humidity must be constant, otherwise the electricity property may be affected.

And in order to reduce the fragment during drilling holes, high quality PTFE film will be needed inside the sandwich of CCL.


PTFE Skived Tape

PTFE Skived Tape

2018-09-03T09:25:54+08:00By |Categories: Applications, Electronics, Products|Tags: , |2 Comments


  1. John 2018年7月28日 at am7:21 - Reply

    How many layers of PTFE fabric will be requested for copper clad laminate?

    • Ms. PTFE 2018年7月28日 at am9:25 - Reply

      Hi John, thanks for your comment! Normally it can be 3-15 layers of PTFE fabric will be requested for lamination.

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