Knowde Enhanced TDS
Identification & Functionality
- Chemical Family
- Polymer Name
- Technologies
- Product Families
Features & Benefits
Applications & Uses
- Applications
- Plastics & Elastomers End Uses
- Applications
- Glazing
- Signs and signals
- Machinery protection
- Lighting
- Bathroom applications
- Vending and recreational machines design
- Displays and other publicity elements (POS)
- Urban furniture (anti-vandal)
- Construction elements
Properties
- Physical Form
- Mechanical Properties
- Physical Properties
- Thermal Properties
- Optical Properties
- Sheet Properties
- Excellent transparency and brightnes
- High resistance to chemical products
- High impact strength and resistance to breakage
- Thermoformable, do not require any pre-drying
- Excellent fire resistance. Low generation of non-toxic smoke
- Recyclable, respectful of the environment, completely combustible, without any emission of toxic substances that contaminate landfills
- Properties
Dimensional stability to heat:
Articles manufactured with this product must not be o continually exposed to temperatures above 60 C, depending on the application.
Aging:
The UV component of sunlight causes degradation to all plastics in general. This degradation depends on the exposure conditions, in other words, on the actual duration of exposure to sunlight, the sheet inclination to the sun's rays, temperature and humidity and on sunlight intensity (geographical coordinates). This degradation shows up as a progressive yellowing, a reduction in light transmission and loss of mechanical properties .NUDEC®PET sheets are not protected against the effects of sunlight, however, the actual material itself possesses a certain resistance to outside weather so that it can be used in exterior applications in locations where sunlight is of low intensity and does not permanently fall on the sheets. For exterior applications where the sheets are permanently exposed to ultraviolet light, a stabilized product, such as NUDEC®PETuv sheets, which are protected on both sides, are recommended. When used in exterior applications, the protective film must be removed immediately, since exposure to sunlight can cause permanent adhesion to the sheet.
Chemical resistance:
In general, NUDEC®PET sheets are able to resist most acids, alcohols, and salts, together with plastifying agents. They are also resistant to hydrocarbons, such as xylene, mineral oils and petroleum. However, resistance to aliphatic hydrocarbons is limited. Similarly, NUDEC®PET sheets also resist the chemical attack of acid rain, diesel engine exhaust fumes and air with a certain amount of salinity. Aromatic compounds can cause several reactions.
Contact with food and sanitary use:
NUDEC®PET sheets (except the UV version) comply with the United States FDA (Food and Drug Administration) and the BGA (Bundes-gesundheitsamt, Germany) standards for contact with foodstuffs. PET is both odor and taste-free, making NUDEC®PET suitable for use applications where it comes into contact with food, and in medical usage. NUDEC®PET sheets can be sterilized by gamma radiation or with ethylene oxide.
| Value | Units | Test Method / Conditions | |
| Ball Pressure Hardness | 117.0 | MPa | ISO 2039 |
| Charpy Impact Test | No breakage | kJ/m² | ISO 179 |
| Elasticity Modulus in Traction | 86.0 | MPa | ISO 527 |
| Elongation (Breakage) | No breakage | % | ISO 527 |
| Resistance to Flexion | 2420.0 | MPa | ISO 178 |
| Rockwell Hardness (M/R Scale) | /111 | MPa | ASTM D-785 |
| Tensile Strength (Breakage) | No breakage | MPa | ISO 527 |
| Tensile Strength (Yield) | 59.0 | MPa | ISO 527 |
| Value | Units | Test Method / Conditions | |
| Density | 1.34 | g/cm³ | ISO 1183 |
| Value | Units | Test Method / Conditions | |
| Coefficient of Linear Thermal Expansion | max. 6 | 10⁻⁵ / °C | ISO 75-2 |
| Heat Deflection Temperature B (0.45 Mpa) | 73.0 | °C | ISO 75-2 |
| Heat Deflection Temperature A (1.8 Mpa) | 69.0 | °C | ISO 75-2 |
| Maximum Service Temperature | 60.0 | °C | - |
| VICAT Softening Temperature (10 N) | 79.0 | °C | ISO 306 |
| VICAT Softening Temperature (10 N) | 75.0 | °C | ISO 306 |
| Value | Units | Test Method / Conditions | |
| Light Transmission | 89.0 | % | ASTM D-1003 |
| Refractive Index | 1.576 | - | ASTM D-542 |
Regulatory & Compliance
- Reaction on Fire
Country Code Classification Great Britain BS 476: Part 7 IY Germany DIN 4102-1 B1 France NFP 92-507 M2 Italy UNI 9177 Class 1
Storage & Handling
- Handling
The sheets should be cleaned with a solution of warm water with a little neutral soap and rinsed with water employing a very soft sponge or chamois leather.
- Handling
Sawing:
The common types of saws employed in wood or metal carpentry provide good results when sawing NUDEC®PET sheets: disk, band, saber, jigsaw, hewing, and handsaw. Disk or band saws produce the best edges and can perform almost all cutting operations. Blade shape plays an important role in sawing plastics. It is recommended to employ a band saw with separated teeth because the empty space will facilitate the exit of the cut chips. The best results are obtained using teeth without any inclination and also somewhat jumped. To prevent the plastic from cracking or melting, the blade must be very sharp and the guide should very close to the cut to prevent vibration.
Die-stamping
NUDEC®PET sheets can be satisfactorily die-cut with steel blades (up to 2 mm). The blade has to be quite frequently replaced or sharpened. The die-cutting press must be adjusted so that the run completely traverses the plastic sheet and stops before blade cause any nicks.
- Polishing
Pre polishing is required to eliminate any marking caused by the cutting disk.
The following may be used:
- Rotating rigid fabric disks with buffing paste
- Rotating soft fabric disks with buffing paste for the final finish
Flame polishing the edge is also possible with a standard butane torch or a hot nitrogen welding torch, care should be taken of the exact distance between the sheet and the heat source and the passing speed. If the heat source is brought too close there is a danger of crystallizing-whitening the surface or the material may becoming too fluid.
- Handling
Because of the exceptional chemical resistance of NUDEC®PET sheets it is not possible to use adhesives with solvents. Among the recommended adhesives are the cyanacrylates, together with twocomponent polyurethanes and epoxies.
The following should be taken into consideration when selecting an adhesive:
- Chemical compatibility with the sheets
- Esthetics of the finished joint
- Dilation and contraction with temperature changes
- Fragility, rigidity and flexibility
- Alterability with respect to outside weather, where applicable
- Duration and useful lifetime
- Adhesive strength (adherence to the plastic)
- Final usage requirements
For perfect gluing of the surfaces to be joined, they must fit together well (without exerting force and without leaving any cavities) and should also be smooth and unpolished. Certain adhesives with volatile components may contract during drying. This effect can be compensated by cutting the joint at an angle, thus leaving space to be filled with a slight excess of adhesive.
- Bending
- Cold bending
NUDEC®PET sheets of less than 3 mm can be cold bent using standard equipment as employed for metal sheets, such as presses or bending machines. The surface protection film should be left in place during the bending process in order to protect it from scratches. It is best not to employ excessive speed for bending since too must stress can cause the surface to break up.
- Bending with incandescent wire
Standard two-side, incandescent wire bending equipment can be satisfactorily employed. Excessive wire temperature or insufficient distance between the wire and the sheet can lead to slight crystallization (fine white misting) of the sheet surface. If this occurs, then the wire power should be reduced or the distance between the wire and sheet increased. In extreme cases, the wire can be replaced for one with a larger diameter in order to reduce the resistance and consequently its temperature. All NUDEC products use film to protect the surface from possible damage during production and transport. This protective film is not prepared to withstand high temperatures and must be removed prior to thermoforming or hot-bending.
- Decoration
Certain printing inks can display some difficulty in adhering to the PET due to its high resistance to solvents. For a list of suitable printing inks please contact the NUDEC Technical department. The print film should be removed just prior to printing to prevent the surface from damage.
- Transport
- Dirt and sharp angles may damage the surface in the case of friction.
- During transport, stable, flat pallets should always be used and the sheets secured to prevent sliding.
- The sheets must not be allowed to slide over each other during loading and unloading operations.
- They should be lifted by hand without any dragging or by suction-cup lifting equipment.
- Storage
- An incorrect storage position can lead to permanent deformation.
- The sheets should be stored in closed premises that guarantee normal environmental conditions.
- The sheets should be stored one on top of the other on flat horizontal surfaces and fully supported over their total area.
- The topmost panel should be covered with a sheet of polyethylene or cardboard etc.
- NUDEC®PET sheets must not be stored in direct sunlight or under conditions of high humidity and/or temperature as this can have a negative effect of protective film adhesion.