RAJNA-i4122 Biodegradable compound for fiber reinforced products


Medium viscosity product for injection moulding application. This material is able to crystallize during processing by increased mould temperature (100-120°C) and longer cycle-time. With cold mould you could produce reinforced plastic product (enclosure) with short cycle-time. The quick freezing of the material in an cold (18-38°C) mould, cause amorphous structure and  54-57°C heat deflection temperature.
* Mould temperature: 120°C
Cycle-time: 90 s. (thickness: 4mm)

Tipical products:

Non-cristallized reinforced plastic products (technical application enclosures) with <55°C heat resistant. Thermostable, cristallized products by 100-120°C mould.


This biodegradable polymer can be processed on most conventional injection moulding equipment. The material is stable in the molten state, provided that the drying procedures are followed. This product is contain a „green” release agent, so you could produce nice produts with fast cycle-time becase the demoulding process will be easier.


This polymer is good for most of conventional injection moulding machine. When you chose a machine for it, the criterion should be the minimum residence time in the barrel.


In-line drying is recommended. A moisture content of less than 0.025% (250 ppm) is recommended to prevent viscosity degradation. Polymer is supplied in foil-lined boxes or bags dried to <400 ppm. The compound should not be exposed to atmospheric conditions after drying. Amorphous polymer must be dried below 50°C.

Fibre reinforcing:

This grade of biodegradable polymer contain 20% chopped basalt strand, which also provides good rigidity and heat resistance. At the end of the product's life cycle, when composted, the fibers appear as 0,3-0,6 mm particle of mineral in the compost. These 13 microns of fibers will be completely deliquescent in the soil in a few years. Them disintegrate in a way similar to the erosion of the mountains.

Our materials are not pre-crystallized. Please take carefully when dry these materials. Our suggest: 50°C and 12-16 hours drying (overnight) process using dehumidified air with a dewpoint of -40°C. The dried material has moisture content of less than 0.025% (250 ppm) is recommended to prevent viscosity degradation. If you could, measure the moisture content with an moisture analyzer before processing of product.

An important fact! The dried material can absorb the moisture content of the free air within 10 minutes, which significantly reduces the quality of the product. Please pay close attention to this during processing.

Other informations and order:

e-mail: info@friendplastic.hu
tel.: +36 30 6090 267