| 摘要 |
A process for forming a thermoplastic sheet layer containing granular particulate includes raising the temperature of a thermoplastic to form a melt At least 2% by weight of the particles making up the particulate have a mean x-y-z dimension average linear dimension greater than 0.008 inches. Upon cooling the pigmented melt, pellets are formed. The pellets are then melted and extruded to form a thermoplastic sheet layer. A structural laminate is also provided that has a thickness of from 0.015 to 0.35 inches and an overall composition of at least 60 total weight percent plastic resin. Of the 60 total weight plastic resin, at least 10 weight percent is thermoplastic. The resultant structural laminate has a coefficient of linear thermal expansion of less than 7x10<SUP>-5 </SUP>per degrees Celsius, a flexural modulus of between 250,000 and 900,000 pounds per square inch, and a heat distortion temperature of at least 170° F.
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