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Polyethylene composite material, preparation method and use thereof

A composite material and polyethylene technology, applied in the direction of coating, can solve the problems of scrap, peeling and cracking of parts, and achieve the effect of low defective product rate, improved quality and simple processing technology

Inactive Publication Date: 2012-10-31
温原 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Due to its good toughness, corrosion resistance and economy, polyethylene resin is a good material for internal anti-corrosion protection of fire extinguisher tanks. However, since polyethylene is a non-polar plastic, it cannot be combined with fire extinguisher tanks. Under the environment, it is easy to form peeling and cracking, causing the parts to be scrapped, which limits its application in the field of fire extinguisher lining anticorrosion
The Chinese invention whose publication number is CN101148525A discloses a polyethylene composite material, including polyethylene, calcium carbonate, a coupling agent and a surfactant, magnesium carbonate also in the polyethylene composite material, and the ratio of calcium carbonate to magnesium carbonate It is 3-1.5, and the particle diameter of calcium carbonate and magnesium carbonate is 0.1-20mm, but the material that this invention provides is specially used as packing material, requires material to have dispersion easily, the tensile strength of material is high, and elongation at break is high and High tear strength, not suitable for anti-corrosion use of fire extinguishers or metal pipe linings

Method used

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  • Polyethylene composite material, preparation method and use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Prepare raw material according to the embodiment 1 of table 2 and table 3, and prepare polyethylene composite material as follows:

[0047] a. Polyethylene LDPE (its melt flow rate is > 50g / 10min, without blocking agent), maleic anhydride and DMDPB (ie 2,3-dimethyl-2,3-diphenylbutane) according to The ratio is mixed on a high-speed mixer for 2 minutes, melted and blended by a twin-screw extruder, extruded and granulated to make an adhesive masterbatch, and the extrusion process parameters are: the melt temperature is 200 ° C, and the screw speed is 100 rpm. The melt flow rate of the bonded masterbatch was detected to be 17g / 10min.

[0048] b. Mix polyethylene LDPE (its melt flow rate is 2g / 10min, without anti-blocking agent), ethylene acrylic acid copolymer (20% acrylic acid content) and the adhesive masterbatch obtained in step a on the intermediate mixer in proportion After 2 minutes, it was melt-blended by a twin-screw extruder, extruded and granulated, and the extr...

Embodiment 2

[0051] Prepare raw material according to the embodiment 2 of table 2 and table 3, and prepare polyethylene composite material as follows:

[0052] a. Polyethylene LDPE (its melt flow rate is > 50g / 10min, without blocking agent), maleic anhydride and DMDPB (ie 2,3-dimethyl-2,3-diphenylbutane) according to The ratio is mixed on a high-speed mixer for 3 minutes, melted and blended by a twin-screw extruder, extruded and granulated to make an adhesive masterbatch, and the extrusion process parameters are: the melt temperature is 250 ° C, and the screw speed is 200 rpm. The melt flow rate of the bonded masterbatch was detected to be 12g / 10min.

[0053] b. Mix polyethylene LDPE (its melt flow rate is 10g / 10min, without anti-blocking agent), ethylene acrylic acid copolymer (acrylic acid content is 20%) and the adhesive masterbatch obtained in step a in proportion on the mixer After 2 minutes, it was melted and blended by a twin-screw extruder, extruded and granulated, and the extrusi...

Embodiment 3

[0056] Prepare raw material according to the embodiment 3 of table 2 and table 3, and prepare polyethylene composite material as follows:

[0057] a. Polyethylene LDPE (its melt flow rate is > 50g / 10min, without blocking agent), maleic anhydride and DMDPB (ie 2,3-dimethyl-2,3-diphenylbutane) according to After mixing for 3 minutes on a high-speed mixer, melt and blend through a twin-screw extruder, extrude and granulate to make a bonding masterbatch. The extrusion process parameters are: the melt temperature is 210°C, and the screw speed is 150rpm. The obtained The melt flow rate of the bonded masterbatch was detected to be 9.7g / 10min.

[0058] b. Mix polyethylene LDPE (its melt flow rate is 20g / 10min, without anti-blocking agent), ethylene acrylic acid copolymer (acrylic acid content is 20%) and the adhesive masterbatch obtained in step a in proportion on the mixer After 3 minutes, it was melted and blended by a twin-screw extruder, extruded and granulated, and the extrusion...

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Abstract

The invention belongs to the field of macromolecular material, particularly discloses a polyethylene composite material, comprising the following materials in terms of percentages by mass: 10-90% of polyethylene, 5-40% of ethylene acrylic copolymer and 5-50% of adhesive master batch, wherein the adhesive master batch comprises the following materials in terms of percentages by mass: 95-99.45% of polyethylene, 0.05-3% of maleic anhydride or acrylic acid and 0.5-2% of DMDPB. The invention further provides a preparation method of polyethylene composite material. The polyethylene composite material has high liquidity, high viscosity and high chemical resistance, and is particularly suitable for preparing anticorrosion lining of an extinguisher tank and anticorrosion lining of a metal pipe; the tank or the pipe is not eroded and does not leak and the lining layer does not strip and crack in two years.

Description

technical field [0001] The invention belongs to the field of polymer materials, and in particular relates to a polyethylene composite material used for anticorrosion of fire extinguisher inner lining or metal pipeline inner lining and a preparation method thereof. Background technique [0002] The national standards GB4351 "Portable Fire Extinguisher" and GB8109 "Trolley Fire Extinguisher" both stipulate that water-based fire extinguishers must be protected against internal corrosion. [0003] Domestic water-based fire extinguishers (foam, light water, aqueous film-forming fire extinguishers, etc.) started late in the research on the inner wall of the cylinder, and the method is simple. From the late 1990s to the early 1990s, enamel was used for anti-corrosion treatment of the inner wall of the fire extinguisher cylinder. Since enamel could not withstand mechanical impact, the fire extinguisher was fragile during processing and handling, and the enamel coating was easy to br...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/06C08L23/08C08L33/02C08L51/06F16L58/10
Inventor 温原姚天军
Owner 温原