Preparation method of high density polyethylene hollow wrapped pipe
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A technology of high-density polyethylene and manufacturing methods, which is applied in the field of pipe manufacturing, can solve the problems of high specificity, low ring stiffness and impact resistance of sewage pipes, achieve superior performance, improve impact resistance and ring stiffness, and reduce production cost effect
Inactive Publication Date: 2009-02-04
GUANGDONG SANLING PLASTIC PIPE MATERIAL
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However, the existing sewage pipes have a large proportion, low ring stiffness and impact resistance, which bring a lot of inconvenience to the construction
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[0012] CaCO 3 After the powder and titanate are dried, add liquid paraffin, mix and activate at 110±5°C for 8 minutes, mix with LDPE resin and HDPE resin, melt and extrude in an extruder, and granulate.
[0013] Sewage pipe material formula:
[0014] name
Proportion (parts by weight)
Require
HDPE
100
Density: 0.94-0.96g / m3
Melt index: 0.25g / 10min
modifier
25
Aluminosilicate defoamer
5
Colorant carbon black
0.03
[0015] Dry the material before mixing, because if the surface humidity of HDPE is not treated, it will seriously affect the quality of the product, so it must be dehumidified and dried, and the optimum temperature is 120 °C.
[0016] Then the materials are ...
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Abstract
The invention discloses a manufacturing method of a high-density polyethylene hollow wall winding pipe which is used as a large-diameter sewage drain pipe. HDPE resin, modifier, defoamer and mixed pipe wall material are extruded by an extruder at 160 to 180 DEG C to produce small square tubes; after cooling stereotyping, the small square tubes are enwinded spirally to form sewage drain pipe walls; pipe wall material molten at 160 to 230 DEG C are used to bond the spirally enwinded square pipes to form sewage drain pipes. The sewage drain pipes is light weighted, shock resistant, highly intense, and uses calcium carbonate with low price as a modifier, greatly improves the shock resistance and ring stiffness of the sewage drain pipe and reduces the production cost of the sewage drain pipe without reducing the tenacity of the HDPE sewage drain pipe.
Description
technical field [0001] The invention relates to a method for manufacturing a pipe, in particular to a method for manufacturing a high-density polyethylene hollow-wall winding pipe used as a large-diameter sewage pipe. Background technique [0002] HDPE hollow wall winding sewage pipe has the advantages of chemical resistance, impact resistance, aging resistance, cold resistance, light weight, convenient connection, excellent drainage and fluidity, etc. It can replace pipes made of high energy consumption materials (cement, cast iron, ceramics, etc.), Widely used in drainage and sewage pipelines in highways, municipal construction, residential quarters, sports fields, squares, mines, agriculture, culverts, bridges and other fields. However, the existing sewage pipes have a large proportion, low ring stiffness and impact resistance, which bring a lot of inconvenience to the construction. Contents of the invention [0003] The object of the present invention is to provide a ...
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