Sheets PTFE

Porous ptfe grades are produced from suspension ptfe powders and specifically they are a mixture of different particle size distributions and hardness degrees to achieve the desired level of porosity.

Virgin PTFE or compounded PTFE dimpled sheets. Thanks to the special surface, the above dimpled sheets are generally used in the engineering and construction field. Dimpled sheets are the perfect solution to thermal expansion and load problems usually connected with structural elements.

One of the most common applications for dimpled sheets is the insertion between 2 movable elements (i.e. bridges), working as a self lubricating system exempt from any need of maintenance.

Due to their special and heavy applications, not only the process technology is certified by Guarniflon, but also the type of raw materials used. Guarniflon® dimpled sheets are processed in accordance with the international standard EN 1337-2.

Etching process available. Available sizes on stock:

  • mm. 1000 x 1000 thickness mm. 5,0
  • mm. 1000 x 1000 thickness mm. 5,5
  • mm. 1200 x 1200 thickness mm. 5,0
  • mm. 1200 x 1200 thickness mm. 5,5

For the heaviest applications in the hydraulic field, motion control and mechanical field, Guarniflon® developed a new family of products, made by special PTFE compounds and devoted technologies, in order to fulfil Guarniflon® customers requirements.

Compounded PTFE materials with bronze, carbon, graphite or other fillers are designed to enhance properties such as:

  • wear resistance
  • coefficient of friction
  • compression strength

Available:

  • with sharp edges
  • with chamfers on 2 or 4 angles
  • knurled on 1 or 2 sides
  • etched on 1 or 2 sides
Fasce guida

Thickness from mm. 1,5 to mm. 5 - Width from mm. 4 to mm. 300

Width in mm.   Thicknessn in mm.
  4    
  5  
  5,4  
  5,5  
  6  
  6,1  
  7   1,50 - 2,00
  7,9   2,50 - 3,00
  8   4,00 - 5,00
  9    
  9,5  
  9,8  
  11  
  11,5  
  12  
Width in mm.   Thicknessn in mm.
  12,5    
  13  
  14  
  14,5  
  15  
  16  
  16,5   1,50 - 2,00
  18   2,50 - 3,00
  19,5   4,00 - 5,00
  20    
  21,5  
  22  
  24  
  24,5  
  25  
Width in mm.   Thicknessn in mm.
  27    
  27,5  
  28  
  29,5  
  30  
  30,5  
  31,5   1,50 - 2,00
  32   2,50 - 3,00
  34   4,00 - 5,00
  34,5    
  35  
  38  
  40  
  45  
  50  
Tolerance standard
Width
     
from 3,00 to 40,00 mm.   ± 0,10 mm.

from 40,011 to 50,00 mm.   ± 0,20 mm.
Thickness
     
from 1,00 to 4,00 mm.   + 0/-0,05 mm

from 4,01 to 5,00 mm.   ± 0,05 mm.
Rolls lenght
     
Thickness mm.
 
Width mt.
1,5
 
35
2
 
25
2,5
 
20
3
 
16
4
 
24
5
 
15
Fasce guida * Customized dimensions on request.

A wide range of machined products are processed on CNC machines / automatic lathes. To ensure high and stable quality standards, Guarniflon® is running the electronic system S.P.C. (Statistical Process Control).

More than 40 million pieces machined every month, delivered all over the world and for a range of applications.

Virgin PTFE or compounded PTFE materials can be machined and fully or partially etched.

  • globe valves seats
  • piston rings
  • hydraulic seals
  • snap rings
  • to customer drawing
  • O-Rings/Back-up Rings
  • PTFE Balls
BackupRings
$
O-Rings
$
Thread Seals
$

The etching process consists in a chemical surface treatment on virgin or filled PTFE. It allows PTFE to be glued on to surfaces of various materials, such as rubber, metal, plastics, etc.

  Download brochure
etching tecnology
 
Format: pdf 512 kb
Some of the most common applications are for the tank lining where chemical agents must be stored, machine tool sliding surfaces, coupling with other materials for fi nished parts, etc.

Guarniflon® owns the most updated technologies devoted to the etching process on semifinished (sheets, tapes, tubes, bars) and finished PTFE products, virgin or compounded.
The etching process of Guarniflon® is capable of providing uniformly reactive surfaces.

Sheets and skived tapes, etched on one or two sides, are available in the following standard sizes:
Sheets
  Thickness:     min. mm. 1,5 - max. mm. 100
  Sizes (mm.):     600 x 600
1000 x 1000
1200 x 1200
1500 x 1500

Machined products:

Rings, bushes, parts and other designed products can be etched according to the end use partially or on the total surface.

Quality of etching:

GUARNIFLON® can guarantee the quality of etching by the control of process parameters and by evaluating the extent of etching itself through a wettability test (Contact Angle Method), and an adhesion test (ref. ASTM D903).

Contact angle method:

It is based on the measure of the angle between the tangent to a distilled water drop and the PTFE surface (ie, the contact angle).
In Figure 1 two examples of contact angle are illustrated - on unetched surface (poor wetting) and on etched surface (good wetting), respectively.
The relationship in terms of performance between contact angle and etching is shown in Figure 2.

Contact angle and surface energy of etched PTFE are related by the following formula:

where:
Es = surface energy (dynes/cm)

= contact angle (degrees)

The graph in Figure 3 shows contact angle vs. surface energy.

Fig.1
 
Un-etched   Etched
  Fig.2

Contact Angle

 
Degree of Etching
20° - 45°
 
excellent
46° - 60°
 
fair
> 60°
 
poor
CONTACT ANGLE vs. SURFACE ENERGY SURFACE ENERGY IN DYNES/CM

The solutions to problems of sealing Developed by Guarniflon® R&D team, SC series is a superior and unique material for gasket (flat Sealing) applications. The overall benefits of Guarniflon® SC series over that of both conventional PTFE and competitive PTFE/filler blends are found in the areas of environmental improvement (they are asbestos free) and overall cost saving. Main applications in the chemical, petrochemical, pharmaceutical, food, paper industries, etc.

4 different types of products are available from SC Series, in sheets and rolls:

  • SC 1100
  • SC 1200
  • SC 1400
  • SC 1600

Available also on stock in sheets: mm. 1500 x 1500 - Thickness mm. 1,5 2,0 3,0.

Sheets can be delivered with printed surface under customers order.

SC chemical resistance chart
Download
SC
$1100
SC
$1200
SC
$1400
SC
$1600

PTFE skived films calendered and/or ultra flat, available with adhesive coating or etched surfaces. CALFILM Series is grouping 4 different types of products:

  • GF High modulus and pressure sensitive tape
  • GFI Ultra flat film
  • GF COMPOUND High Performance tape
  • PSA Pressure sensitive adhesive tape

Some applications:

SEALING COATING AGAINST HIGH TEMPERATURES
Using on cylinders and to protect sensitive components against high temperatures up to 280°C.

SLIDING SURFACE SHELL
The application of PTFE film on sliding surfaces shell allow to create antifriction surfaces, for a very smooth motion.

ANTICORROSIVE SHELL
Water and oil proof, Guarniflon® tapes can tolerate most chemical agents, except for organic solvents that can attack the tape adhesive coating.

PROTECTION AGAINST THE JUNK DEPOSIT
Guarniflon® tapes help to avoid the deposit of textile debris, inks, glues, pasty elements, preserving the machines from possible damages.

ELECTRICAL/ELECTRONIC FIELDS
Assembling of PCB (Printed Circuit Board), solar panels, LCD/TFT monitors, electrical cables.
Main applications from food to mechanical industries, from electronic to aerospace industries, from textile to paper mill industries.

Available in tapes and rolls.
CALFILM
$GF
CALFILM
$GFI
CALFILM
$GF COMPOUND
CALFILM
$PSA

PTFE Paste sealant for Threads

Tenfil is a solvent – free paste, in a watery leakage, to be pre-applied on the threads for a better sealing. It’s available for 3 specific applications (water-gas-air) and supplied in special small containers.
Main characteristics:
  • excellent resistance to the major part of solvents
  • not flammable
  • non toxic
  • easy application
TENFIL
$TF 200
TENFIL
$TF 400

PTFE Sheets

Technologies available at Guarniflon® provide options among a wide range of molded or skived sheets, in virgin PTFE as well as compounded PTFE.

According to customers’ needs, Guarniflon® can suggest the most suitable solutions concerning available technologies, materials and dimensions.

In order to grant a fast and efficient service to its customers, Guarniflon® stocks a wide range of molded and extruded sheets, in different thickness and dimensions.

Etching process available on 1 or 2 sides.



PTFE Sheets
Formato: pdf 204Kb


PTFE SHEETS
$MOLDED
PTFE SHEETS
$SKIVED

PTFE Tubes and PTFE Rods

An extensive range of sizes are available to satisfy customers’ requirements for both molded and extruded products. In addition to virgin PTFE tubes and rods, standard or special compound products are also available.

According to customers’ needs, Guarniflon® can suggest the most suitable solutions concerning available technologies, materials and dimensions. In order to grant a fast and efficient service to its customers, Guarniflon® stocks a wide range of molded and extruded tubes and rods, in virgin PTFE as well as compounded.


PTFE Tubes and PTFE Rods
Formato: pdf 247Kb

PTFE TUBES
$EXTRUDES
PTFE TUBES
$MOLDED
PTFE RODS
$EXTRUDED
PTFE RODS
$MOLDED
Page 6 of 6

NEWS& EVENTS

Thursday, 10 June 2021 06:29

GUARNIFLON ATTENDING THE 21ST EDITION OF CHINA OIL & GAS SHOW IN BEIJING

The cooperation between Shanghai Martina Polymer Materials and Guarniflon Spa leaded to the participation at the above exhibition in Beijing, still ongoing,

Read more
Wednesday, 24 March 2021 13:50

GUARNIFLON HITS ANOTHER SIGNIFICANT MILESTONE IN CHINA THROUGH THE MERGER WITH SHANGHAI MARTINA POLYMER MATERIALS CO. LTD.

Following months of negotiations, Guarniflon® Spa agrees to purchase a share of Shanghai Martina Polymer Materials Co., Ltd with the objective to expand its presence in the Chinese market.

Read more

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