RAJNA compound range · material for foamed products
RAJNA-i5120 compound for foamed plastic products
A compound positioned for the development of foamed, cellular or lightweight plastic products, with the foaming system, processing route and final properties defined through project-specific trials.
Product positioning of RAJNA-i5120
RAJNA-i5120 is the grade within the Friend Plastic RAJNA range positioned for foamed products. The public compound list identifies it as a biodegradable compound for foamed products, but does not currently publish a complete processing window or verified performance data.
Documentation limitation: the public product list does not state a verifiable base polymer, blowing-agent type, processing temperature, addition rate, achievable density reduction or mechanical-property set. These values must be confirmed from the current TDS, SDS, formulation and production trials.
Why use a foamed plastic structure?
Depending on the application, foaming may be used to reduce part weight, lower material consumption, create a cellular structure, modify stiffness-to-weight ratio or improve selected thermal or acoustic characteristics. These objectives can conflict with one another, so the required structure and performance must be defined before trials begin.
Weight reduction
Lowering the apparent density can reduce part weight and potentially reduce material use.
Cellular structure
Cell size, cell distribution and open- or closed-cell character strongly influence mechanical and functional performance.
Surface and dimensional objectives
Some foaming processes may reduce sink marks or packing demand, but can also create swirl marks, silver streaks or an uneven surface.
Functional lightweighting
Housings, cores and other components where lower mass must be balanced against defined structural performance.
Defining the foaming system
Before using RAJNA-i5120, the method used to create the cellular structure must be clarified. The public product list does not state whether the grade contains an integrated blowing system, requires a separate blowing-agent masterbatch or is intended for a physical gas-assisted process.
Information required at project start
- Chemical or physical foaming technology.
- Blowing-agent type and activation or decomposition range.
- Target density and weight reduction.
- Required cell size and cell distribution.
- Part wall thickness and flow length.
- Permitted surface variation and colour change.
- Minimum mechanical and thermal performance.
Potential application directions
The final application must be approved from the current product documentation and representative production trials. The following areas are general development directions, not automatically validated RAJNA-i5120 use cases.
Lightweight housings
Injection-moulded parts where lower mass must be achieved while maintaining sufficient rigidity and dimensional stability.
Thick-walled products
Geometries where sink marks, internal stress or excessive part weight are key development concerns.
Custom cellular components
Technical, packaging or other products where a cellular structure provides a measurable functional benefit.
Processing and mould-design considerations
Quality of a foamed part depends on formulation, gas-generation timing, pressure, temperature, mould design and cooling. Exact values must be established from the current technical data sheet and production trials.
| Material preparation | Drying temperature, time and target moisture content must be taken from the latest RAJNA-i5120 technical data sheet. |
|---|---|
| Foaming system | Confirm whether the product is pre-compounded with a blowing system, requires a separate masterbatch or is intended for a physical foaming process. |
| Temperature profile | Polymer stability and blowing-agent activation must be coordinated. An unsuitable profile can cause premature or delayed gas generation. |
| Injection pressure and speed | Filling, cell growth, surface quality and internal pressure must be optimised together. |
| Mould and gate design | Gate size and position, flow path, venting and mould temperature directly influence cell structure and surface quality. |
| Holding pressure | A strategy different from conventional solid moulding may be required; excessive holding pressure can suppress foaming. |
| Cooling | Uniform cooling is important for reducing warpage, cell collapse and dimensional variation. |
| Machine and mould cleaning | Blowing agents or their decomposition products may create deposits. Cleaning frequency must be established during trials. |
Verified processing temperatures, blowing-agent addition rates and moisture limits were not publicly available. A serial-production recipe or guaranteed density reduction cannot be stated without these data and representative trials.
Recommended production-trial and testing programme
Part weight alone is not sufficient to qualify a foamed product. Cell structure, mechanical behaviour, dimensional stability and surface appearance must be evaluated together.
Density and part weight
Compare density, individual part weight and process variation against an appropriate solid reference.
Cell structure
Evaluate cell size, cell distribution, skin layer, voids and possible cell collapse by sectioning or microscopy.
Mechanical performance
Tensile, flexural, compressive or impact testing selected according to the actual service load.
Surface and dimensional stability
Check silver streaking, waviness, sink marks, warpage, shrinkage and all critical functional dimensions.
Development targets should be stated numerically wherever possible, for example maximum part weight, minimum flexural strength, permitted warpage or target density range.
Environmental and compliance claims
The word “biodegradable” in the product list does not automatically establish biodegradability or compostability of every finished foamed article. Cell structure, wall thickness, additives and the test environment can all affect the result.
Applicable standard
Any claim must identify the exact industrial-composting, biodegradation or other applicable test standard.
Finished-part geometry
Wall thickness, apparent density and cell structure can influence disintegration time and test performance.
Complete formulation
Blowing agent, colourant, filler and every other additive must be included in the compliance assessment of the finished product.
Frequently asked questions about RAJNA-i5120
Which products is RAJNA-i5120 intended for?
The current Friend Plastic compound list identifies it as a compound developed for foamed products.
Does it contain an integrated blowing agent?
The public product list does not make this clear. The current TDS must confirm whether the grade is pre-compounded, requires a separate masterbatch or is intended for another foaming system.
What weight reduction can be achieved?
No verified value can be stated without current product data and production trials. The result depends on the foaming system, geometry, wall thickness and processing conditions.
Are the mechanical properties of the solid material retained?
Not necessarily. Density reduction and the cellular structure can modify stiffness, strength, impact behaviour and crack propagation.
Will the finished foamed product be compostable?
This can only be claimed if the complete formulation and finished product meet the requirements of the specified compostability standard.
Do you need RAJNA-i5120 documentation or a foaming trial?
Send Tibor Sipos the part drawing, wall thickness, current solid reference material, target density or weight reduction, foaming technology, mechanical requirements and estimated annual volume. Based on this information, Friend Plastic can assess feasibility and define the required production-trial programme.