PTFE, FEP, PFA Recycling
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1. Introduction

Molecular formula: [CF2--CF2]n
CAS No. 9002-84-0

Pure PTFE in a very fine powdered form, this product is a superior substitute for talc and other lubricants commonly used on grand knuckles and keybeds. The knuckle is the single biggest source of friction in the grand action. Despite graphite or polymer coatings on the repetition lever, friction levels often remain high enough to adversely affect touch weight and cause squeaking. While dry lubricants such as talc or One-Puff will work to some degree, none are as effective or long-lasting as the correct grade of PTFE powder. The average particle optimum size is 3 microns.

PTFE powder is especially valuable when making touchweight measurements on grand actions, since it will typically reduce friction by about 2 grams compared to other lubricants, and virtually eliminates the static friction (reluctance of the action parts to start moving), so that you no longer have to tap the bench top to get the key moving when measuring downweight or upweight. Thus the job goes faster and your measurements are more consistent.

The virgin PTFE (polytetrafluoroethylene) powder is used for the applications to makerods, tubing etc. by paste extrusion. Its typical end products includes wire and cable insulating coating, linings, hoses, tubing, sleevings for use with heat, steam, hydraulic fluid, etc… Preferred for the extrusion processing with reduction ratios (i.e. RR) in the range 400 : 1 to 1500: 1. Typical products are extruded small tubing or rods, e.g. Ø 1.8 / 1.5 or Ø 0.9 / 0.5

2. Typical properties:

3. Safety precautions

• Toxic gases will be produced when the material is heated above 260 degree C. Ventilation system must be provided in sintering areas.
• Sintering temperature should be below 400 degree C to avoid decomposing.

4. Packaging, storage and transportation

• 20kg net packed in double PE plastic bags with a cardboard drum outside.
• Store in clean, cool (5-20 degree C) and dry place
• Open containers and use the material in clean environment only.

5. Powder types and chemical properties

POLYFLON PTFE F-104 produced by Daikin is used for the manufacture of unsintered tape, and tubes molded with a low reduction ratio; F-201 and F-203 are used for the manufacture of items molded with a high reduction ratio, such as insulated electric wires, spaghetti tubes, and small-diameter tubes. F-302 is a thick material with outstanding properties for secondary processing and thermal fusion of thick insulated electric wire, jacketing, medium to large diameter tubes and ingot tubes, etc.

POLYFLON PTFE can be used continuously at temperature up possesses excellent low temperature strength. With these superior thermal properties, products such as electric or electronic machinery components, pipe linings, insulated electric wires, etc., made with POLYFLON PTFE Fine Powder are widely used.

POLYFLON PTFE possesses the excellent property of almost absolute resistance to all commonly used chemicals. When used with some special chemicals under extremely severe conditions, such as fused alkali metals, changes may occur. With ordinary acids, alkalis, and oxidants at high temperatures POLYFLON PTFE remains completely stable. Even contact with organic compounds does not cause dissolution or swelling. The basic reason for POLYFLON PTFE‘s extensive use in the chemical industry for pipe linings, wire-braid hoses, gaskets, tubes and bellows is in its chemical inertness.

Since the molecular structure of POLYFLON PTFE is non-polar, it is ideal for use as high-frequency insulating material not only because of its applicability over a wide temperature range, but also because of its low, uniform dielectric constant and dissipation factor over a wide frequency range.

POLYFLON PTFE Fine Powder is used for the manufacture of insulation covering for use in aircraft, electrical wiring, small coaxial cables, industrial control cables, spaghetti tubes and wrapping tapes.

Tubes made of POLYFLON PTFE Fine Powder are therefore used as transport tubes for liquid adhesives, cableway pipes, etc., for automobile and other mechanical , being extremely soft and malleable. The many product gradesDuPont™Zonyl fluoroadditives are designed to provide just the right combinations of powder characteristics to meet the needs of diverse products and processes.

Zonyl® fluoroadditive powders are popular because they can contribute some of their unique properties to the host material to which they are added. However, the suitability of an additive powder for mixing with and enhancing a given host is determined by many other factors.

Zonyl® MP1100 fluoroadditive is a white, free-flowing PTFE powder designed for use as an additive in other materials to impart low surface energy and other fluoropolymer attributes. In particular, it has been found well suited for use in inks and coatings where a narrow particle size distribution is desired. With plastics and elastomers, it provides improved lubricity and wear resistance. Added to lubricants, it can enhance performance under severe conditions. Zonyl® MP1100 can be used at temperatures from –190 to 250°C (–310 to 480°F).

Zonyl® MP1200 fluoroadditive is a white, free-flowing PTFE powder designed for use as an additive in other materials to impart low surface energy and other fluoropolymer attributes. In particular, it has been found well suited for use in inks and coatings where a narrow particle size distribution is desired. With plastics and elastomers, it provides improved lubricity and wear resistance. Added to lubricants, it can enhance performance under severe conditions. Zonyl® MP1200 can be used at temperatures from –190 to 250°C (–310 to 480°F).

Zonyl® MP1300 fluoroadditive is a free-flowing, white powder designed for use as an additive in other materials to impart low surface energy and other fluoropolymer attributes. Zonyl® MP1300 may improve the wear resistance of host materials such as thermoplastics or coating materials and enhance their nonstick, lubricity, and frictional characteristics. Added to lubricants, it can enhance performance under severe conditions. Zonyl® MP1300 can be used at temperatures from –190 to 250°C (–310 to 480°F).

Zonyl® MP1400 fluoroadditive is a free-flowing, white powder designed for use as an additive in other materials to impart low surface energy and other fluoropolymer attributes. Zonyl® MP1400 may improve the wear resistance of host materials such as thermoplastics or coating materials and enhance their nonstick, lubricity, and frictional characteristics. Added to lubricants, it can enhance performance under severe conditions. Zonyl® MP1400 can be used at temperatures from –190 to 250°C (–310 to 480°F).

Zonyl® MP1600N fluoroadditive is a free-flowing, white powder designed for use as an additive in other materials to impart low surface energy and other fluoropolymer attributes. Zonyl® MP1600N may improve the wear resistance of host materials such as thermoplastics or coating materials and enhance their nonstick, lubricity, and frictional characteristics. Added to lubricants, it can enhance performance under severe conditions. Zonyl® MP1600N can be used at temperatures from –190 to 250°C (–310 to 480°F).

Zonyl® TE-3887 PTFE fluoroadditive is a negatively charged, hydrophobic colloid containing approximately 60% (by total weight) of 0.05 to 0.5 µm polytetrafluoroethylene (PTFE) resin particles suspended in water. A milky white liquid, Zonyl® TE-3887 also contains approximately 6% (by weight of PTFE) of a nonionic wetting agent and stabilizer. Viscosity at room temperature approximately 20 cP. Nominal pH is 10.

PTFE white granular molding powders are ideal for molding many different end products and stock shapes. Excellent chemical resistance, electrical properties, high temperature performance, low temperature toughness, plus unique adhesion and flame resistance.

PTFE granular molding powders are processed by compressing them into a desired shape and heating them at temperatures above their melting point to consolidate the powder.

Resin Characteristics: High bulk density. These small particles result in the highest quality electrical and mechanical properties of all PTFE granular molding powders. Uses: Large cylinders for making tape or sheet by skiving; large shapes for machining or direct use.

Powder coating is an economical and environmentally friendly method of applying decorative and protective finishes to a wide variety of materials and products that are used by industry and consumers.
Some industries where powder coatings are used include General Industrial Products, Consumer Products, Appliances, Agriculture & Construction Equipment (ACE), Architectural, Automotive, and Pipe & Valve.
Powder coatings are available in virtually unlimited colors and include high or low gloss, matte, textured, vein, and wrinkle finishes. Coatings with FDA, NSF, and UL approvals are available. A complete line of RAL colors is available and custom colors can be formulated when needed.

For instance Plas-Tech applies powder finishes from the following suppliers:

• DuPont Coating Solutions
• Tiger Drylac
• Sherwin-Williams
• Rohm and Haas
• Cardinal Industrial Finishes
• Arkema
• Peridium by DiamondVogel
• Plascoat
• Protech Powders
• Solvay Solexis

6. Benefits of Powder Coatings

• Attractive, durable, high-quality finish
• Cost effective compared to liquid coatings
• Environmentally friendly- virtually pollution free, NO VOC’s
• Consistent coating thickness; both thin and thick films
• Corrosion resistance
• Virtually any color or gloss
• Matte finishes and wrinkle coats can hide surface defects or imperfections such as spot welds, nicks & scratches

7. Types of Powder Coatings

• Polyester
• TGIC Polyester
• Epoxy
• Hybrid (Epoxy/Polyester)
• Urethanes
• PVDF (Polyvinylidene Fluoride)
• Nylon II (Polyamides)
• Polyolefins (polyethylene & polypropylene resins)
• Halar (ECTFE)
• Fluoropolymers (PFA, FEP, & ETFE)

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