Knowde Enhanced TDS
Identification & Functionality
- Additives Included
- Chemical Family
- Polymer Name
- Plastics & Elastomers Functions
- Technologies
- Product Families
Features & Benefits
Applications & Uses
- Markets
- Applications
- Plastics & Elastomers End Uses
- Plastics & Elastomers Processing Methods
- Water Absorption
When using construction insulating materials with direct water or moisture contact (e.g. perimeter insulations; reversed roof insulation), low water absorption is of great importance, since absorption of 1 % by volume of water will increase the thermal conductivity by approximately 4 %. The special coating of lambdapor® roof together with the additives included in the material, guarantee minimum water and steam absorption. In order to ensure optimum results, best possible fusion is very important.
We therefore recommend that the degree of fusion is checked using a “fusion tester“ supplied by Erlenbach and to adjust the fusion to >95 %. The suitability for certain applications must be verified through test methods simulating the long-term-behavior of the insulating material. These test methods have meanwhile been standardized European-wide.
Properties
- Color
- Typical Properties
| Value | Units | Test Method / Conditions | |
| Density Range | 25 - 35 | kg/m3 | — |
| Granulate Geometry | Bead-shaped granulate | — | — |
| Screen Limits | 0.6 - 1.5 | mm | — |
| Typical Granulate Diameter (min. 95% by weight) | 0.7 - 1.3 | mm | — |
| Pentane Content (at the time of packaging) | min. 5.0 | % | — |
| Water Content (at the time of packaging) | max. 0.3 | % | — |
Regulatory & Compliance
- Certification
lambdapor® roof contains polymeric flame retardant and is certified to EN 13501-1 class E.
Technical Details & Test Data
- Processing
Pre-expansion
With discontinuously operating state-of-the-art preexpanders, lambdapor® roof can be pre-expanded to densities of 25 – 35 kg/m³. The pre-expanded material should not be dried too long or intensively in the fluid bed otherwise static charging might occur.
Intermediate aging
Intermediate aging should be between 10 and 48 hours
Molding:
lambdapor® roof can be processed in commercially available molding machines. When processing into molded foam boards used for direct water or moisture contact, best possible fusion must be ensured since the degree of fusion is directly connected with the water absorption.
- Long-Term Water Absorption by Immersion (EN 12088)
With this test, the test specimen is stored under water for 28 days at 23 °C and the water absorption is subsequently determined in % by volume. During this test the water can only enter the spaces between the beads. Consequently, the degree of fusion is the decisive parameter for the water absorption. The EPS raw material employed can only act in a supportive manner.
- Long-Term Water Absorption by Diffusion (EN 12088)
With this test method one side of the test specimen is exposed to a 50°C warm steam phase, with a cold cooling surface of 1°C on the opposite side. Through the large steam pressure differences, and the high humidity of the air, this test arrangement primarily simulates conditions such as encountered on “reversed roofs“.
Since EPS not specially developed for these applications is highly permeable by steam, the steam does not only enter the intermediate spaces but also the EPS beads, condenses and can then no longer escape as water. lambdapor® roof contains special additives which severely reduce the steam permeability, therefore reducing the water absorption by diffusion compared with “standard“ EPS by approximately 90 %. Despite this characteristic, an optimum fusion is important for low water absorption.
Another influencing factor is the test specimen thickness. The bigger thickness of the board, the lower the water absorption. We therefore recommend adapting the board thickness to the respective application.
Safety & Health
- Safety Instructions
Flammable pentane-air mixtures may be generated during storage and processing of lambdapor® 753. For this reason, adequate ventilation must be ensured (LEL pentane 1.3 % by volume). The blowing agent pentane escapes relatively slowly from EPS foam blocks. Thus, when cutting recently molded blocks, the formation of a flammable pentane-air mixture has to be anticipated.
In addition, all conceivable sources of ignition must be kept away, and the build-up of electric charges has to be prevented.
Packaging & Availability
- Packaging
lambdapor® 753 premium is shipped in octabins (height max. 192 cm) on wooden pallets (114 x 114 cm) containing 1,150 kg net of material.
- Packaging of Boards
We recommend that lambdapor® 753 molded parts are packed in opaque plastic film, as their exposure to direct sunlight can result in fading and distortion.
- Shipping
UN-Number 2211 Designation Polymeric beads, expandable
Class 9 Packing Group III ADR
Storage & Handling
- Storage
The octabins are not weather- or waterproof and must therefore not be exposed to outdoor conditions. It is not recommended to stack octabins more than one layer high. In case of double-stacking octabins under controlled conditions, the recommendations laid out in the document „Instructions for stacking sunpor octabins“ must be followed. In order to obtain the desired properties of lambdapor® 753 premium, the raw material should be stored below 20 °C and be processed within one month.