NOVELTY – Production of polyamide compounds with natural fibers involves i) forming natural fibers and ii) forming polyamide compounds with natural fibers. The step (i) involves grinding natural fibers in forms A and B until to obtain mean length of 0.1-15 mm; superficially treating fibers with cold plasma of oxygen/nitrogen in quartz reactor; treating in soidum hydroxide solution and washing in water and distilled water; and drying fibers subsequently in kiln at 100degrees C for 2 hours. Step (ii) involves homogenizing fibers prepared in advance with polymeric matrixes and extruding compound. USE – For production of polyamide compounds with natural fibers, applicable in automobile and civil construction industries (claimed). ADVANTAGE – The method provides the polyamide compounds that has less density, cost and abrassiveness on the processing equipment, and an increase of 300% in the module under traction and 80% in tension in maximum force, than the compound with inorganic load by continuous process. DETAILED DESCRIPTION – Production of polyamide compounds with natural fibers by using natural fibers in the bulk form and natural fibers dried for 1.5 hour at 100degrees C in conventional kiln without superficial treatment, involves: i) preparation of natural fibers; and ii) production of polyamide compounds with natural fibers. The step (i) involves: ia) natural fibers, in the form A as well as B, are ground in a cutting (knives)’mill until obtaining the mean length of 0.1 to 15 mm; ib) superficially treated the already ground natural fibers with cold plasma of O2 or N2 in a quartz reactor; ic) treating the fibers in a solution of NaOH (10 mass%), and washing once in water from the main water supply and once with distilled water; and id) drying the fibers subsequently in a kiln at 100degrees C for 2 hours. Step (ii) involves iia) using separate the amount of natural fibers; iib) homogenizing the natural fibers prepared in advance with the polymeric matrixes; and iic) extruding the compound obtained in step (iib). An INDEPENDENT CLAIM is included for polyamide compounds with natural fibers, comprising (wt.%) polyamide-6 (80) and Curaua fiber (20), where the compounds has a density of 1.18 g.cm-3, and an increase of 300% in the module under traction and 80% in tension in maximum force.

Main Application Field

A32 (Polymer fabrication – such as moulding, extrusion, forming, laminating, spinning.); A23 (Polyamides; polyesters. (including polycarbonates, polyesteramides); alkyds; other unsaturated polymers.); A93 (Roads, building, construction flooring.); A95 (Transport – including vehicle parts, tyres and armaments.)

INVENTORS:

DE PAOLI MARCO AURELIO
GODOI FERMOSELLI KAREN KELY
DA SILVA SPINACE MARCIA APAREC
DOS SANTOS PAULO APARECIDO
GIRIOLI JOAO CARLOS

120_FIBRAS

Patent number: WO2007137378-A2;BR200602097-A;WO2007137378-A3;EP2021403-A2;KR2009073056-A;US2009234047-A1;JP2009537671-W;CN101563403-A;US8066934-B2;US2012053268-A1;CN101563403-B;BR200602097-B1

PATENT STATUS:

GRANTED

FOR ADDITIONAL INFORMATION:

parcerias@inova.unicamp.br

+55 (19) 3521-5207 / 2607

This technology profile has been automatically generated.