Knowde Enhanced TDS
Identification & Functionality
- Chemical Family
- Polymer Name
- Technologies
- Product Families
Features & Benefits
Applications & Uses
- Markets
- Applications
- Plastics & Elastomers End Uses
- Applications
- Displays, signs, showcases and other publicity material at sales points (PLV)
- Industrial protection
- Molded pieces
- Vending and recreational machines design
- Orthopedic parts and medical equipment components
- Riot shields
- Glazing
- Construction components
- Urban and interior furniture design
Properties
- Physical Form
- Mechanical Properties
- Physical Properties
- Thermal Properties
- Optical Properties
- Properties
- Excellent transparency and surface brightness
- High impact strength, close to that of polycarbonate
- In impact-based applications, lower thicknesses to those of acrylic sheets can be employed with better results
- Ductile, elongation to breaking similar to that of polycarbonate
- Excellent chemical resistance
- They are available with UV protection
- Easily thermoformable FDA (21 CFR 177.1315) United States, apt for use with foodstuffs (except the UV version)
- Reduce noise transmission
- Sterilisable
- Recyclable
- Properties
Dimensional stability to heat:
Articles manufactured with this product must not be exposed to continuous use at more than 60°C, depending on application.
Transformation:
It does not whiten when cold-bent up to 2.5 mm. Can be cut with a guillotine. They can be easily sawn, edged and drilled without any burring. Easily welded even with PVC. Surface scratches are easily eliminated with a hot air gun. Unlike polycarbonate, it can be laser-cut. The same tools employed in diamond buffing of acrylics can be used to buff NUDEC®PETg sheets.
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. For exterior applications where the sheets are permanently exposed to ultraviolet light, a stabilized product, such as NUDEC® PET guv 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.
| Value | Units | Test Method / Conditions | |
| Charpy Impact Test | No breakage | kJ/m² | ISO 179 |
| Charpy Impact Test | 10.0 | kJ/m² | ISO 179 |
| Elasticity Modulus in Traction | 2200.0 | MPa | ISO 527 |
| Elongation (Breakage) | min. 200 | % | ISO 527 |
| Resistance to Flexion | 79.0 | MPa | ISO 178 |
| Rockwell Hardness (M/R Scale) | 115.0 | MPa | ASTM D-785 |
| Tensile Strength (Breakage) | 26.0 | MPa | ISO 527 |
| Tensile Strength (Yield) | 53.0 | MPa | ISO 527 |
| Value | Units | Test Method / Conditions | |
| Density | 1.27 | g/cm³ | ISO 1183 |
| Value | Units | Test Method / Conditions | |
| Coefficient of Linear Thermal Expansion | 6.8 | 10⁻⁵ / °C | ISO 75-2 |
| Heat Deflection Temperature B (0.45 Mpa) | 72.0 | °C | ISO 75-2 |
| Heat Deflection Temperature A (1.8 Mpa) | 68.0 | °C | ISO 75-2 |
| Maximum Service Temperature | 60.0 | °C | — |
| VICAT Softening Temperature (10 N) | 83.0 | °C | ISO 306 |
| VICAT Softening Temperature (10 N) | 78.0 | °C | ISO 306 |
| Value | Units | Test Method / Conditions | |
| Light Transmission | 88.0 | % | ASTM D-1003 |
| Refractive Index | 1.57 | — | ASTM D-542 |
Regulatory & Compliance
- Reaction to Fire
Country Code Classification Great Britain DIN 4102-1 B1 Germany NFP 92-507 M2 France BS 476: Part 7 IY
Storage & Handling
- Handling
Cleaning:
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.
Cutting:
Sawing
The common types of saws employed in wood or metal carpentry provide good results when sawing NUDEC® PETg 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® PETg 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 can also be employed with a standard butane torch or a hot nitrogen welding torch, with precise maintenance of the exact distance between the sheet and the heat source. If the heat source is brought too close there is a danger of bleaching the surface or the material becoming too fluid.
Drilling:
NUDEC® PETg sheets can be drilled quite easily with a normal stand drill or even with a hand-drill using clean, sharp drill bits. Drill bits designed for use with plastics are recommended. It is occasionally possible to use ordinary drill bits, but they should be sharpened to reduce the depth or cutting angle. During the drilling operation, the sheet must be firmly held, but avoiding excessive pressure at the same time. Speeds of up to 1,750 rpm are preferred for small drill holes and for larger holes, whereas speeds as low as 350 rpm are advised. The use of compressed air is recommended to prevent overheating, especially in cases where sheet thicknesses exceed 5 mm.
Gluing:
Gluing with adhesives Among the recommended adhesives are the cyanacrylates, together with two-component acrylics, 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.
Mechanical securing:
This method is useful when assembling or installing large or heavy pieces. It is recommended that screws specifically designed for plastics are employed.
There are various thermoforming techniques that can be applied to NUDEC® PETg sheets in order to obtain the desired shape once heated, using mechanical force, compressed air or a vacuum. Molds can be made of plaster, water-cooled steel, cast aluminum or other materials, such as wood or epoxy.
- Pre-drying, as required for polycarbonate, is not necessary. Time and energy savings.
- Thermoforming temperatures between 120 and 160°C. Very high temperatures can reduce the impact strength of the material.
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.
Bending:
NUDEC® PETg sheets can be curved and bent with a small radius by first heating a narrow strip on both sides of the sheet using a electric heater. When the sheet reaches the correct temperature (above 105°C) a slight resistance will be noted to folding, this is when the sheet is easily bent. If it is attempted to bend the sheet before it is heated sufficiently, stress will occur that will lead to breakage. If, on the other hand, the sheet is over-heated, bubbles might appear along the section that is to be bent. It can also be cold bent up to 2.5 mm. 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:
Hot stamping Signs, drawings, trademarks and other figures can be hot-stamped on NUDEC® PETg sheets. Printing NUDEC® PETg sheets can be printed with standard presses; however, the ink does not penetrate in this plastic as it does with paper or fabric and is therefore liable to be erased with rubbing. This risk can be reduced by applying a layer of transparent lacquer over the print. They can also be painted, silk-screened and laser-decorated. 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® PETg 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.