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RTP Company has added a range of cellulose-fibre-reinforced polypropylene (PP) compounds to its Eco Solutions portfolio. Utilising Weyerhaeuser’s Thrive renewable cellulose fibre extracted from trees grown in sustainably managed forests, the compounds are suitable for use in the design and production of environmentally friendly products in a range of structural injection-moulded parts, including bezels, bases, brackets, knobs, handles, lids and housings for the automotive, appliance, furniture, lawn and garden, sporting goods and toy markets. 

Cellulose fibres are described by RTP as a unique reinforcement that can be incorporated into PP to provide increased strength, stiffness and thermal performance. In comparison with other natural fibres such as wood, hemp and sisal, or natural fillers such as wood flour and wheat straw, cellulose fibre provides higher strength and stiffness, consistent colour, superior processability, low odour and a reliable supply.

Cellulose fibre can also be combined with glass-fibre or impact-modified copolymer for materials that meet the requirements of more demanding applications.

PP cellulose fibre comparison

Further benefits

  • Advantages that cellulose fibre has over glass fibre as reinforcement in PP include: renewable content to meet sustainability objectives; lower energy consumption during processing; specific gravity reductions of six to nine per cent at like loadings; average cycle time reductions of up to 30 per cent for medium- to thick-walled parts; and reduced tool wear.
  • Compared with unreinforced PP, a homopolymer PP with 20 per cent cellulose fibre reinforcement offers a 38 per cent increase in tensile strength, a 75 per cent boost in flexural modulus and a 60°F rise in heat deflection at 66lb/in2 (16°C at 455kPa).
  • Cellulose-fibre-reinforced PP compounds offer strength and stiffness that is comparable to uncoupled glass-fibre-reinforced PP and achieves approximately 75 per cent of the performance of a chemically coupled glass-fibre-reinforced PP.
  • These compounds can incorporate post-consumer recycled PP to maximise their eco-friendly content. They are fully colourable and can be overmoulded with select RTP thermoplastic elastomers to enhance application ergonomics.

RTP Company

Your Global Compounder of Customer Engineered Thermoplastics

RTP Company’s private ownership allows our expert polymer engineers to be independent and unbiased as they select from 60+ engineering resins and 100’s of modifying additives to tailor a thermoplastic compound designed to meet your specific end-user requirements.

  • Conductive Static Dissipation
  • Structural Reinforcement
  • Lubricated Wear Resistance
  • High Continuous Use Temperatures
  • UL Recognized Flammability
  • Soft-touch Overmoldable Elastometers
  • Special Color and Appearance Effects
Our speciality compounds provide multi-property solutions in a single material, reducing manufacturing costs and speeding time to market while providing the freedom necessary for product designers and engineers to realize their vision for applications spanning every major market segment.
If your in the process of application development, let RTP Company solve your material challenge by formulating a custom thermoplastic compound optimized to make your product a success – don’t compromise with another suppliers off-the-shelf ordering.

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