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.
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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
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.
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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.
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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:
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where:
Es = surface energy (dynes/cm)
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The graph in Figure 3 shows contact angle vs. surface energy.
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Fig.2
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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.
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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.
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
If you need to skive very thin thickness and/or special compound, only the most updated technologies, the most selected raw materials and a skilful know-how can grant excellent and stable quality.
Guarniflon® have all of the above capabilities and presently able to offer very high quality products starting from the thickness of 0,025 mm. Some of Guarniflon® tapes applications are for the aerospace or electronics, a technological reference for quality and reliability.
Guarniflon® tapes are available in virgin PTFE or filled by bronze, carbon, glass fiber and other special materials, able to cover a very wide range of different industrial applications.
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.
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.