Natural fiber granulating process for preparing composite materials

• Main Authors: LI JUN, ZHANG HUA, ZHANG JIANCHUN, YAN ZILI, MA TIAN, HAO XINMIN
• Format: Patent
• Language: Chinese; English
• Published: 21.09.2011
• Subjects: MAKING GRANULES OR PREFORMS; PERFORMING OPERATIONS; PREPARATION OR PRETREATMENT OF THE MATERIAL TO BESHAPED; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIALCONTAINING PLASTICS; TRANSPORTING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

The invention discloses a natural fiber granulating process for preparing composite materials. The natural fiber granulating process comprises steps as follows: (1) opening natural fibers and low-melting fibers and mixing the natural fibers with the low-melting fibers in mass ratio of 95/5-5/95 so as to obtain blend fibers, wherein the melting point of the low-melting fiber is lower than 200 DEG C; (2), carding and drawing the blend fibers obtained from the step (1) to form natural fiber tops; (3) simultaneously heating and twisting the natural fiber tops obtained from the step (2), obtainingnatural fiber formed tops by cooling and forming, and finally obtaining natural fiber granules via cutting. After the natural fibers are granulated by aid of the process, granulated natural fibers are fed into an extrusion machine, and then problems of difficulty of feeding of the natural fibers and difficulty of dispersing fibers in resin when preparing natural fiber reinforced composite materials by adopting the extrusi