Plastic bellows was first developed in the 1950s, in the last 20 years has been rapid development. Has been developed and applied plastic bellows, Double Wall Plastic Mug according to the production of plastic corrugated pipe used by the material can be divided into "HDPE bellows", "UPVC bellows", "PP bellows" and so on, of which PVC plastic bellows current production Big.
Plastic corrugated pipe in the structural design using a special "ring groove" shaped cross-section form, this pipe design novel, reasonable structure, breaking the ordinary pipe "plate" traditional structure, so that the pipe has enough pressure and shock Strength, Double Wall Plastic Mug but also has good flexibility. According to the structure of plastic bellows, bellows can be divided into single-wall corrugated pipe and double-walled bellows. Single-walled plastic bellows is the plastic pipe inside and outside the walls are corrugated pipe, Double Wall Plastic Mug with high rigidity, can be bent, infinite package. Double wall corrugated pipe refers to the inner wall is smooth and the outer wall has a ripple (corrugated shape can be right angle, trapezoidal, sinusoidal, etc.) of the plastic tube, it is by the simultaneous extrusion of the corrugated outer wall and a smooth inner wall of a sintering extrusion The In addition to its ordinary plastic with all the good corrosion resistance, high insulation, Double Wall Plastic Mug smooth inner wall, small flow resistance and other characteristics, due to the use of a special hollow ring stiffness and good strength and toughness. In the same strength, stiffness requirements, the use of double-walled corrugated pipe than ordinary plastic tube to save materials 30% -50%, technical and economic better, and easy transportation and installation, reducing the construction workers labor intensity, but also reduced The total investment of the project, but the curvature is small. Application of bellows: single-wall corrugated pipe can be widely used in golf courses, sports ground and other light load, etc. drainage, permeable; interior decoration wire casing; car wire casing; prestressed anchor cable casing; The Double wall corrugated pipe can be widely used in highways, slopes, golf courses and other heavy load conditions, drainage, flooding; municipal sewage; communications, power supply cable casing and other occasion