Pressed board for panels in security and fire doors

The invention relates to a pressed panel for panels in security and fire doors， which comprises a compressed and hardened thermal insulation core (3) formed from chips of agricultural crop stalks in a thickness ranging from 20 mm to 50 mm. At least one fabric (2) of basalt， glass or carbon microfibers with a mesh size of 10 mm to 30 mm is arranged in the thickness and / or on at least one surface of the thermal insulation core (3). At least one surface of the thermal insulation core (3) is terminated by a geopolymer layer (1) with a specific weight of from 250 kg.m to 600 kg.m in a thickness from 5 mm to 15 mm. The thermal insulation core (3) contains 80% by weight to 95% by weight of chips from crop stalks and 5% by weight to 20% by weight of a binder based on a urea-formaldehyde adhesive mixture. In a preferred embodiment of the pressed board， the geopolymer layer (1) is foamed. The specific weight of the pressed plate is in the range from 500 kg.m to 750 kg.m.

本发明涉及一种应用于安全防火门门板的压制板材，其包含经压缩硬化的隔热芯体（3），该隔热芯体由厚度范围为20 mm至50 mm的农作物秸秆碎屑压制而成。在隔热芯体（3）的厚度方向内部和/或至少一个表面上，布设有至少一层网目尺寸为10 mm至30 mm的玄武岩、玻璃或碳纤维微纤维织物（2）。隔热芯体（3）的至少一个表面覆有厚度为5 mm至15 mm、体积密度为250 kg/m³至600 kg/m³的地质聚合物层（1，geopolymer layer）。隔热芯体（3）的组分质量占比为：80%至95%的农作物秸秆碎屑，以及5%至20%的以脲醛胶黏剂混合物（urea-formaldehyde adhesive mixture）为基料的黏合剂。在该压制板材的优选实施例中，地质聚合物层（1）为发泡结构。该压制板材的体积密度范围为500 kg/m³至750 kg/m³。