本标准规定了无填料和增强材料的冲击改性聚苯乙烯（PS-I1）实心扁挤压板材的要求和试验方法。根据第3条，本标准仅适用于厚度为0.25 mm至20.0 mm的材料。本标准也适用于卷形PS-I板材。

This standard specifies the requirements and test methods for solid flat extruded sheets of impact-modified polystyrene (PS-I1) without fillers and reinforcing materials. This standard applies only to thickness 0,25 mm to 20,0 mm in accordance with clause 3. This standard also applies to PS-I sheet in roll form.