70系列内、外平开窗特点：
70 series internal and external casement window features:
1. Tianrui 70 series, with structure depth of 70mm, maximum visible surface of 150mm and wall thickness of 1.6mm.
2. The design adopts stepped drainage structure to prevent rainwater from pouring back. It has a variety of glass configurations to improve the thermal insulation performance. It can be equipped with external hanging screen window.
3. To ensure the service life, C-type PA66 thermal insulation strip is adopted to form a plane between the thermal insulation strip surface and the aluminum surface to prevent ponding.
4. The outer and inner frames are made of EPDM honeycomb isobaric adhesive strips, and the inner frame is made of single joint isobaric sealing strips, which can effectively reduce the loss of energy consumption caused by air convection.
5. The inner and outer frames adopt mechanical corner code for corner assembly, and the cross section adopts two-way treatment of section glue and corner assembly glue to strengthen the corner connectivity, the structure is stable and firm, and prevent water seepage and anti moisture at the window corner.
