The outer frame of the filter is composed of sturdy waterproof boards, which are used to fix the folded filter material. The diagonal planning on the outer frame can provide a large filtering area and tightly adhere the internal filter material to the outer frame. The surroundings of the filter are bonded to the outer frame with special professional adhesive, which can prevent air leakage or damage caused by wind resistance pressure.

The outer frame of disposable paper frame filters is generally divided into general hard paper frames and high-strength die-cut cardboard, with the filter element lined with pleated fiber filter materials and a single sided metal wire mesh. Beautiful appearance. The structure is sturdy and durable. The general cardboard frame is used to make non-standard filters, which can be used to produce standard filters arbitrarily, with high strength and not easy to deform. High strength die-cut cardboard is used to make standard filters, characterized by high standard accuracy and low aesthetic cost. If imported surface fibers or synthetic fibers are used to filter data, their various performance indicators can reach or exceed the imported filter.

The filter material is folded into high-strength die-cut cardboard, increasing the windward area. The dust particles in the incoming air are effectively obstructed between folds by filtering data. Clean air flows out evenly from the other side, so the airflow through the filter is smooth and uniform. Depending on the filtered data, the particle size obstructed varies from 0.5 μ M to 5 μ The filtration efficiency varies depending on the m.