Thermal behaviour and crystallisation
Formulation and processing strategies for injection-moulded products requiring controlled crystallisation or improved heat deflection performance.
Friend Plastic · RAJNA compound range
PLA-based and biodegradable polymer compounds
Application-specific compounds for injection moulding and specialised plastics projects, with modified mechanical, thermal and processing characteristics.
Application-driven compound development
Standard commercial polymers do not always meet the mechanical, thermal, flammability or processing requirements of a new product. Friend Plastic develops and evaluates compounds with the final application, processing route and measurable acceptance criteria in mind.
Mechanical modification
Toughness, impact behaviour and structural performance adjusted to suit the intended product and load case.
Special functions
Flame-retardant, fibre-compatible, foaming or process-specific compound concepts for clearly defined industrial applications.
RAJNA compound range
The RAJNA family includes PLA-based compounds developed for different injection moulding and technical applications. Product selection should always be based on part geometry, processing conditions, regulatory requirements and the required final-product performance.
Compound for food-contact product development
Low-viscosity compound for injection moulding. Increased mould temperature can promote partial crystallisation and improve the heat resistance of suitable products. Typical development targets include cutlery, cups and plates.
Product detailsToughened injection moulding compound
Medium-viscosity compound with modified mechanical behaviour. Suitable for evaluating household and technical products where reduced brittleness and increased heat resistance after crystallisation are required.
Product detailsFlame-retardant compound
Medium-viscosity compound for technical products requiring a flame-retardant material concept. The applicable rating, test standard, specimen thickness and colour must be confirmed from current test documentation.
Product detailsCompound for moulded cutlery
Compound positioned for the production of cutlery and similar thin-walled injection-moulded products, described in the current product list as containing a “green” release agent.
Product detailsCompound for fibre-reinforced products
Compound for reinforced housings and technical products. Cold moulding can provide a shorter cycle and a more amorphous structure, while elevated mould temperature supports crystallisation.
Product detailsCompound for foamed products
Compound positioned for cellular or lightweight plastic products. The foaming system, achievable density reduction, cell structure and processing window must be defined through current technical documentation and production trials.
Product details
Technical and compliance notice:
final properties depend on drying, machine configuration, mould
temperature, residence time, part geometry, colour, additives and
post-processing. Food-contact, flammability, biodegradation or
compostability claims must be supported by current documentation and,
where required, testing of the finished product under its actual use
conditions.
Custom compound development process
A successful compound project starts with measurable product requirements rather than a generic polymer name. The final formulation and processing window must be developed together.
Application and requirements
Definition of the product function, service environment, mechanical loads, temperature range and regulatory requirements.
Material and formulation concept
Selection of the polymer matrix, additives, fillers or reinforcement concept and the target processing range.
Compounding and production trial
Preparation of trial material followed by extrusion, injection moulding or another relevant processing test.
Testing and optimisation
Evaluation of specimens and manufactured parts, followed by formulation or process adjustments where required.
In-house processing and material testing
Development can be supported by processing trials and material testing. This helps determine whether the formulation, processing technology and finished product meet the defined project targets.
Available capabilities
- DSC thermal analysis
- HDT heat deflection testing
- Tensile and Charpy impact testing
- MFR and MVR melt flow testing
- Flammability testing
- Xenon-arc weathering testing
- Injection moulding of standard test specimens
- Testing of filaments and 3D-printed specimens
Frequently asked questions
What is a polymer compound?
A compound is a processing-ready plastic material in which the base polymer is combined with selected additives, fillers or reinforcing materials to achieve defined properties.
Can every RAJNA compound be used for the same product?
No. Viscosity, mechanical modification, crystallisation behaviour and special functions differ between grades. Selection must be based on the final product and processing route.
Does heat resistance depend only on the material grade?
No. For PLA-based compounds, crystallinity and heat performance can also depend on mould temperature, cycle time, geometry, cooling and post-processing.
Can a custom colour or modified property be requested?
The feasibility of a custom formulation can be assessed after the technical requirements, expected volume and required validation programme are defined.
Are biodegradability or compostability claims automatic?
No. Such claims must refer to a specific standard, test environment, formulation and finished-product geometry.
Looking for a compound for a specific application?
Send us the intended product description, manufacturing technology, mechanical and thermal requirements, applicable standards and estimated annual volume. We can then assess whether an existing RAJNA grade or a custom formulation is the appropriate route.