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Polypropylene modified material and method for preparing plastic inner casing of water heater by using same

A modified material, polypropylene technology, applied in the field of water heater plastic liner, polypropylene modified materials, can solve the problems of low strength, short service life, easy deformation and aging, etc., to achieve high strength, long service life and easy operation Effect

Inactive Publication Date: 2012-07-25
青岛百旺电器有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a modified polypropylene material and a method for making a plastic inner tank of a water heater using the material to solve the problems of easy deformation and aging, low strength and short service life of the plastic inner tank material of a solar water heater at high temperature

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] 1) Put the raw materials into a mixer according to the mass percentage of 60% polypropylene, 20% glass fiber, 5% calcium carbonate, 5% diphenylamine, 5% carbon black, and 5% sizing agent, and mix for 2 hours at 20°C;

[0055] 2) hot melt:

[0056] Put the mixed material into the hot-melt pipe, and heat-melt at 150°C for 2 hours;

[0057] 3) Extrusion:

[0058] The hot-melted material is fed into the screw extruder and extruded at 100°C with an extrusion pressure of 2MPa;

[0059] 3) Blow molding:

[0060] The extruded material was blow-molded by a blow-molding machine head at a blow-molding temperature of 100° C. and a pressure of 2 MPa to obtain a plastic liner.

Embodiment 2

[0062] 1) Put the raw materials into a mixer according to the mass percentage of 90% polypropylene and 10% glass fiber, and mix for 10 hours at 80°C;

[0063] 2) hot melt:

[0064] Put the mixed material into the hot-melt pipe, and melt it at 200°C for 10 hours;

[0065] 3) Extrusion:

[0066] The hot-melted material is fed into the screw extruder, and extruded at 200°C, with an extrusion pressure of 5MPa;

[0067] 3) Blow molding:

[0068] The extruded material was blow-molded by a blow-molding machine head at a blow-molding temperature of 200° C. and a pressure of 5 MPa to obtain a plastic liner.

Embodiment 3

[0070] 1) Put the raw materials into a mixer according to the mass percentage of 80% polypropylene, 10% glass fiber, 2.5% calcium sulfate, 2.5% pentaerythritol ester, 2.5% zinc oxide, and 2.5% sizing agent, and mix at 60°C for 8 hours;

[0071] 2) hot melt:

[0072] Put the mixed material into the hot-melt pipe, and melt it at 180°C for 8 hours;

[0073] 3) Extrusion:

[0074] The hot-melted material is fed into the screw extruder and extruded at 150°C with an extrusion pressure of 4MPa;

[0075] 3) Blow molding:

[0076] The extruded material was blow-molded by a blow-molding machine head, the blow-molding temperature was 150° C., and the pressure was 4 MPa to obtain a plastic liner.

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PUM

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Abstract

The invention belongs to the field of solar water heaters, and relates to a polypropylene modified material and method for preparing a plastic inner casing of a water heater by using the polypropylene modified material. The polypropylene modified material comprises the following components by weight: 60-90% of polypropylene, 10-20% of fiberglass, 0-5% of edible calcium, 0-5% of an antioxidant, 0-5% of an ultraviolet screening agent, and 0-5% of a setting agent. The beneficial effects of the invention are as follows: (1) the polypropylene modified material provided by the invention is high temperature resistant, can be used for a long time at a temperature higher than 100 DEG C, and has good chemical stability; (2) the method for preparing the inner casing of the solar water heater by using the polypropylene modified material is simple in procedures and easy in operation; and (3) the plastic inner casing prepared by the method according to the invention has high strength, does not leak gas and water under a 5MPa container pressure, does not deform and break during water testing, pressurization and other processing processes, and has a long service life over 20 years.

Description

technical field [0001] The invention belongs to the field of solar water heaters, and relates to a polypropylene modified material used as a water heater plastic liner and a production method of the water heater plastic liner using the material. Background technique [0002] At present, most of the inner tank materials of solar water heaters on the market are made of stainless steel. Stainless steel has good corrosion resistance, but in the process of processing, the joints of the inner tank need to be welded, and the quality of the welded parts affects the anti-corrosion performance of the inner tank. [0003] In some areas of our country, the water quality is relatively poor, and the concentration of chloride ions is high. During use, the stainless steel liner often corrodes at the welding seam, and leakage occurs, which affects the life of the liner. [0004] In view of the corrosion of the weld seam of the stainless steel inner tank of solar water heaters, some manufactu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08K13/04C08K7/14C08K3/26C08K3/30C08K3/16C08K3/22F24J2/46
CPCY02E10/40
Inventor 赵敦华
Owner 青岛百旺电器有限公司
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