a method for producing natural fiber composite materials , which increases the flexural strength , thereby , making them more suitable for load bearing applications . the composite material mainly consists of natural cellulose fibers , preferably wood fibers , and olefin group of plastics and is in addition reinforced by a small amount of glass fibers which increases the flexural strength making it suitable for structural applications . a coupling agent , which increases bonding between both glass and natural fibers , with the olefin matrix is also used . the composite material can also be foamed to reduce density & amp ; cost and improve toughness , ability to accept screws / nails and surface texture .