| 摘要 |
THE PRESENT INVENTION IS TO PROVIDE A HELMET HAVING SATISFACTORY COMPATIBLY BETWEEN ITS SHOCK ABSORBING CAPACITY, COMFORTABLE AND SATISFYING USER'S DEMAND IN VIEW OF THE COST.THE INVENTION CONSISTS OF A MOTORCYCLE HELMET, WHICH USES RESILIENT POLYMER FOAM SUCH AS EXPANDED POLYPROPYLENE (EPP). THIS TYPE OF FOAM RECOVERS ITS SHAPE AFTER FIRST IMPACT; THEREFORE PROVIDE A PROTECTION OF HEAD AGAINST MULTI-IMPACT HITS USUALLY ENCOUNTERED IN MOTORCYCLE CRASHES. THE DENSITY OF THE FOAM SHOULD BE BETWEEN 30-70 KG/M3 WITH A SUITABLE DESIGN CONFIGURATION TO ENHANCE VENTILATION.THE NEW DESIGN HAS A SHELL, WHICH MAY BE OF THE CONVENTIONAL TYPE OR OF A NEW BIOCOMPOSITE MATERIALTHE BIO-COMPOSITE SHELL CAN BE MADE OF REINFORCED NATURAL FIBERS SUCH AS OIL PALM, OR COCA NUT, OR A COMBINATION OF ONE OF THESE FIBERS WITH COMMON FIBERS SUCH AS GLASS, CARBON, OR POLYPROPYLENE OR THE LIKE.THE FIBERS ARE IMPREGNATED IN EITHER THERMOPLASTIC SUCH AS POLYESTER OR THERMOSET SUCH AS EPOXY RESINS.THEREFORE THIS INVENTION RELATES TO A NEW DESIGN OF SAFETY HELMET,PARTICULARLY TO THE ONE WITH SUITABLE MULTI-IMPACT PROTECTION, ENHANCED AIR VENTILATION, GOOD FITNESS,AND WITH AN ENVIRONMENTAL FRIENDLY SHELL MATERIAL.(FIG 1)
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