Hot melt adhesive for steel plastic composite pipeline and production method of hot melt adhesive

Abstract

The invention relates to a hot melt adhesive for a steel plastic composite pipeline and a production method of the hot melt adhesive. The hot melt adhesive comprises the following raw materials in percentage by weight: 95 to 98 percent of high-density polyethylene, 0.9 to 2.0 percent of maleic anhydride, 0.02 to 0.2 percent of peroxide, 0.09 to 0.5 percent of antioxidant and 0.9 to 4.0 percent of solvent. The production method comprises the following steps of: adding the high-density polyethylene and the antioxidant into a mixing machine; controlling the temperature of a stirring machine to be between 35 and 40 DEG C and stirring for 2 to 7 minutes; and granulating by using an intermediate-speed cutting combined double-screw extrusion granulator, wherein the extruding temperature is between 170 and 180 DEG C and the temperature of a machine head is between 190 and 200 DEG C. The hot melt adhesive is used for solving the bonding problem between a steel belt and plastic during production of the steel plastic composite pipeline. Based on detection required indexes according to the industrial standard CJ / T225-2006, the peeling strength meets the standard; the ring flexibility is qualified; and the product is qualified after passing a sunlight insolation test. All the indexes meet the industrial standard.

Description

technical field [0001] The invention relates to a steel-plastic composite adhesive, in particular to a hot-melt adhesive for a steel-plastic composite pipe and a production method, and is especially suitable for solving the bonding between steel and plastic in the production of steel-belt-reinforced polyethylene spiral corrugated pipe products. Background technique [0002] At present, the price of hot melt adhesive for steel-plastic composite pipes for steel belt reinforced polyethylene spiral corrugated pipes on the market is relatively high, and the production process is complicated, which is not conducive to operation, and some products cannot be used for pipes with specifications exceeding 1000mm, resulting in ring flexibility of pipes. If the indicators are not up to standard, there will be a problem of detachment between the reinforcing rib and the matrix, and the steel strip and the plastic layer will easily appear when the pipe is exposed to the sun. Contents of th...

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Problems solved by technology

[0002] At present, the price of hot melt adhesive for steel-plastic composite pipes for steel belt reinforced polyethylene spiral corrugated pipes on the market is relatively high, and the production process is complicated, which is not conducive to operation, and some products cannot be used for pipes with specifications exceeding 1000mm, resulting in the ring flexibility of pipes. If the index is unqualified, there will be a problem of detachment between the reinforcing rib and the matrix, and the steel strip and the plastic layer will easily be detached when the pipe is exposed to the sun