Process of confection of polyamide compounds with natural fibers and compounds of polyamides with natural fiber

Process of confection of polyamide compounds with natural fibers and compounds of polyamides with natural fi

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

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