Knowde Enhanced TDS
Identification & Functionality
- Chemical Family
- Polymer Name
- Technologies
- Product Families
Features & Benefits
Applications & Uses
- Applications
- Plastics & Elastomers End Uses
- Applications
- Notices and signs
- Lamps and ceiling lights
- Noise barriers
- Toys
- Gifts and decorations
- Display cabinets
- Glazing
- Television, computer and monitor filters
- Displays and other publicity elements
Properties
- Physical Form
- Mechanical Properties
- Physical Properties
- Thermal Properties
- Optical Properties
- Sheet Properties
- Excellent transparency, with a 92% light transmission
- Bright and colorless
- High rigidity
- Resistant to outside weather
- Elevated hardness
- They can be molded
- Intermediate mechanical strength
- The surface is suitable for buffing
- Properties
- Dimensional stability to heat:
Prolonged exposure to heat must not exceed 80°C.
- Cracking under pressure:
The appearance of cracking essentially depends on the joint action of a chemical agent, temperature, applied stress and the time during which these are applied.
- Aging:
NUDEC®PMMA sheets show excellent stability to outside weather conditions, including UV radiation. Even after years of exposure to sunlight, the sheets do not show any substantial variations in their properties. 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 | |
| Ball Pressure Hardness | 185.0 | MPa | ISO 2039 |
| Charpy Impact Strength Un-Notched | 20.0 | kJ/m² | ISO 179 |
| Elongation (Breakage) | 5.0 | % | ISO 527 |
| Flexural Strength | 120.0 | % | ISO 527 |
| Rockwell Hardness (M/R Scale) | 92/* | MPa | ASTM D-785 |
| Tensile Modulus of Elasticity | 3200.0 | MPa | ISO 527 |
| Tensile Strength (Breakage) | 83.0 | MPa | ISO 527 |
| Value | Units | Test Method / Conditions | |
| Density | 1.19 | g/cm³ | ISO 1183 |
| Value | Units | Test Method / Conditions | |
| Coefficient of Linear Thermal Expansion | 7.0 | 10⁻⁵ / °C | ISO 75-2 |
| Heat Deflection Temperature B (0.45 Mpa) | 101.0 | °C | ISO 75-2 |
| Heat Deflection Temperature A (1.8 Mpa) | 97.0 | °C | ISO 75-2 |
| Maximum Service Temperature | 80.0 | °C | - |
| VICAT Softening Temperature (10 N) | 107.0 | °C | ISO 306 |
| VICAT Softening Temperature (10 N) | 116.0 | °C | ISO 306 |
| Value | Units | Test Method / Conditions | |
| Light Transmission | 92.0 | % | ASTM D-1003 |
| Refractive Index | 1.489 | - | ASTM D-542 |
Regulatory & Compliance
- Reaction to Fire
Country Code Classification Great Britain BS 476: Part 7 3 Germany DIN 4102-1 B2 France NFP 92-507 M4
Storage & Handling
- Handling
Cleaning:
A solution ofwater and neutral detergentmay be employed. They should always be cleaned and dried with a soft cloth with very little pressure.
Cutting:
- Important!
Do not remove the protective film from the sheets before cutting, and once this has been accomplished, blowing or suction should be employed to eliminate any chips.
- Manual cutting
Cutting should always be carried out with a fine-blade saw, with the sheet firmly held in place to prevent vibration. The teeth should be well-sharpened.
- Cutting with a blade
When cutting with a blade, this should be passed several times in order to achieve the desired depth (this should be a minimum of half the thickness), employing a uniform pressure. The sheet must be firmly secured to prevent sliding. Afterwards, the sheet should be placed on a flat surface and gentle pressure applied until it breaks. Sandpaper may be employed to eliminate any burrs.
- Sawing
Cutting recommendations for NUDEC®PMMA sheets
- Disk diameter: 350 - 400 mm
- Number of teeth: 84 - 106
- Rotation speed: 2,800 - 4,500 rpm
- Advance speed: 12 - 18 m/min
- Type of teeth
Alternate teeth or combined straight and trapezoid. The sheet must be firmly secured to prevent them rising up and causing cracks when the disk passes. The translation speed should be as uniform as possible. The disk must be regularly sharpened.
Polishing:
NUDEC®PMMA sheets can be polished using a mechanical buffer at a speed of 1,500 rpm and avoiding surface over-heating. Polishing requires a balance between rotation speed and applied pressure. Final polishing is achieved with soft cloth or flannel disks at high speed (4,000 rpm), with buffing paste. o Edges may be polished using a high temperature air jet (200 to 300°C).
Drilling:
Metal and wood drill bits may be employed. The larger the diameter, the lower the speed. Water or air can be used for cooling. Aholediameter that isapproximately1.5mmlarger thanthatof thescrew to be used should be drilled in order to take sheet dilation in to account. The sheet must be firmly secured to prevent breaking.
Recommended drill speeds:
Diameter (mm) rpm 1.6 7,000 6.4 1,800 12.7 900 Gluing:
NUDEC®PMMA sheets can be glued together to form a transparent joint. Depending on the application and surfaces to be glued together, various types of glue available on the market and suitable for methacrylate sheets can be employed, such as those containing dichloromethane.
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 conditions, where applicable
- Duration and useful lifetime
- Adhesive strength (adherence to the plastic)
- Final usage requirements
Important!
To prevent air bubbles, the glue should be allowed to stand for a while before application, until none can be seen.
- It is recommended that
The surfaces to be glued are clean and degreased. The glued parts must be allowed to dry for twenty-four hours so that maximum hardness is achieved.
Thermalofoaming:
NUDEC®PMMA sheets are easily thermoformable in any oven with air o circulation. The sheet temperature must exceed 140 C. If the sheets have been stored in a damp environment, it is preferable for them to be previously dried for a few hours (two to four) at an o approximate temperature of between 80 to 85 C in order to avoid thermoforming problems. To achieve a good finish, the mold o employed can also be heated to between 50 and 60 C. An excessive mold temperature could harm the sheets. 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®PMMA sheet bending requires a bending template, together with a heating element or incandescent wire. The area to be bent must be completely and uniformly heated. We recommend that the smallest radius be twice the sheet thickness. It is a good idea to cool the part of the sheet that is closest to the bending line. 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.
- Silk screening:
NUDEC®PMMA sheets can be silk-screened just like other materials. Acrylic-based and two-component inks are recommended: epoxy or polyurethane.
- Painting:
They can also be painted by normal spray methods. No prior surface treatment is necessary, apart from cleaning. The paint that is employed must be specially indicated by the manufacturer as suitable for use on methyl polymethacrylate. In general, it is recommended that they contain an acrylic resin base with low-aggressivity solvents. They can also be vacuum metallised. 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®PMMA 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.