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
- Applications
Because of its small bead size sunpor® A452 is also used for contour moldings with a wall thickness of less than 10 mm. Moldings with greater wall thicknesses permit short cooling periods.
Properly processed EPS foam packaging made from sunpor® A452 provides good mold filling properties and high mechanical strength. It is not hygroscopic, and it does not become friable in low temperatures. Molded EPS packaging parts have to act as shock absorbers and cushion their content against blows from outside, i.e. they have to absorb the energy released in an impact.
The mainly closed cell structure of molded foam parts made from sunpor® A452 absorbs the impact stress as „deformation work“. In this process the air enclosed in the cells is first compressed, while bigger impact forces may also deform or crack the cell walls.
Properties
- Flame Rating
- Typical Properties
| Value | Units | Test Method / Conditions | |
| Density Range | 18 - 30 | kg/m3 | — |
| Granulate Geometry | Bead-shaped granulate | — | — |
| Typical Granulate Diameter (min. 95% by weight) | 0.3 - 0.8 | mm | — |
| Pentane Content (at the time of packaging) | min. 5.5 | % | — |
| Water Content (at the time of packaging) | max. 0.4 | % | — |
Regulatory & Compliance
- Certification
Certified to DIN 4102/B1 and EN 13501-1 class E.
Technical Details & Test Data
- Processing
Pre-expansion
With discontinuously operating, state-of-the-art preexpanders sunpor® A452 can be pre-expanded to densities of approx. 14 kg/m³. Lower densities can be achieved by double or triple pre-expansion. sunpor® A452 has been treated with an antistatic agent to prevent a build-up of electro-static charge during transport.
Intermediate aging
Intermediate aging should be between 10 and 48 hours.
Molding:
sunpor® A452 can be processed in industry-standard shape molding machines. The material allows the production of a wide range of molded parts and, by varying the steaming and filling gap parameters, the degree of fusion and the surface structure can be optimized for specific applications.
Safety & Health
- Safety Instructions
Flammable pentane-air mixtures may be generated during storage and processing of sunpor® A452. 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
sunpor® A452 is shipped in octabins (height max. 192 cm) on wooden pallets (114 x 114 cm) containing 1,150 kg net of material.
- Shipping
UN-Number 2211 Designation Polymeric beads, expandable
Class 9 Packing Group III ADR
Storage & Handling
- Storage
The octabins are not weather- or water-proof 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 sunpor®A355, the raw material should be stored below 20 °C and be processed within one month.