METHOD FOR FORMING BOND BETWEEN PLASTIC MATERIAL FOR MAKING FLUID PERCOLATE AND FILTER MATERIAL FOR MAKING FLUID PERCOLATE

摘要

PROBLEM TO BE SOLVED: To produce a rational filter in comparison with conventional methods. SOLUTION: In the first step, a plastic material is plastified over a part of its depth by a heat source installed at a short distance from a plastification area, in the second step, the heat source is removed, in the third step, the end fringe part of a filter material is pushed into the unplastification area of the plastic material, and in the fourth step, the pushed filter material is held at the pushing position until a strong bond between it and the plastic material is formed. In a method for forming a strong, airtight bond between the plastifyable plate-shaped plastic material for making fluid percolate and the end fringe parts, which are arranged in parallel to each other, of the flat filter material which can not be plastified especially and is folded zigzag, the heat source is composed as an infrared heater having the maximum radiation in a wavelength range of 0.75-1.5 m and energy per unit area of at least 200 kw/m2 .