By applying high-count fiberglass, YZC system needled mat has the excellent properties such as heat-isolation, fire-resistance, anti-corrosion and heat-preservation. It's the most characteristic and newest heat-preservation material of inorganic silicate at present. Following is its strong points: (1) Lightness, heat resisting, low thermal capacity and low thermal conductivity, soft and excellent fire-isolation. (2) Anti-heat energy and heat stability. (3) Anti-mildew, anti-insect, un-scattered and good stretching resistance. (4) Excellent anti-ageing. (5) Excellent sound absorbability, adsorption and filtering. (6) It can be cut, sewn according to requirements and it's also easy to construct.