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High-temperature-resistant corrosion-resistant diaphragm core material

A corrosion-resistant diaphragm technology, applied in the field of diaphragm core materials, can solve the problems of unrecoverable deformation, rigidity and flexural modulus decline, etc., and achieve good high-frequency insulation, small compression permanent deformation, and extended storage time. Effect

Inactive Publication Date: 2019-04-16
HENAN DAZHANG FILTER EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the material of the diaphragm is made of polypropylene plus elastomer toughening, and its disadvantage is that the material properties are still plastic properties; the main component is polypropylene, which has entered a high elastic state under high temperature conditions, and its rigidity and flexural modulus are sharply reduced. drop, the deformation cannot be recovered after the temperature is lowered; therefore, a diaphragm core material that is resistant to high temperature and corrosion is required

Method used

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  • High-temperature-resistant corrosion-resistant diaphragm core material

Examples

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Comparison scheme
Effect test

Embodiment 1

[0013] A high-temperature-resistant and corrosion-resistant diaphragm core material, weighed by weight parts polypropylene 25%, EPDM rubber 55%, naphthenic oil 15%, dicumyl peroxide (DCP) 1%, talcum powder 10%.

[0014] The beneficial effect of the present invention is that: block copolymerized polypropylene with grade K8303 has low density, and its strength, rigidity, hardness and heat resistance are superior to those of low-pressure polyethylene, can be used at about 100°C, and has good electrical properties and high-frequency insulation Non-toxic, but it becomes brittle at low temperature, not resistant to mold and easy to age; the brand is Dow 4725 EPDM rubber, the Mooney viscosity is only 25, and its plasticity is strong; the crosslinking agent is dicumyl peroxide (DCP) , can greatly reduce early vulcanization and prolong the storage time of the mixed rubber. The vulcanized rubber has good dynamic properties, small compression set, slightly low hardness, moderate strength...

Embodiment 2

[0016] A high-temperature and corrosion-resistant diaphragm core material, which weighs 55-65% of EPDM rubber and 0.8-1.5% of dicumyl peroxide (DCP) in parts by weight, mixes them evenly at room temperature, and then Add to the first feed port of the twin-screw extruder for mixing, inject 10-15% after mixing, then mix 25-30% of polypropylene and 8-13% of talc powder evenly and add to the second feeding port of the twin-screw extruder Extrusion granulation with two feeding ports.

[0017] The core material of the high temperature resistant and corrosion resistant diaphragm is obtained through the above process; the performance test indicators are as follows:

[0018]

[0019] It can be seen from the data table that the elongation at break of the material is 580%, so it has a good tensile effect; the tensile strength, elongation, and hardness of the material do not change after 168 hours at 150°C. Large, indicating that the resilience at high temperature is very good, which ...

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Abstract

The invention relates to a high-temperature-resistant corrosion-resistant diaphragm core material. The material is characterized in that by weight, 55-65% of ethylene-propylene-diene monomer rubber and 0.8-1.5% of dicumyl peroxide (DCP) are weighed and evenly mixed at normal temperature, then the mixture is added into a first feed inlet of a double-screw extruder for mixing, 10-15% of naphthenic oil is injected after mixing, and then 25-30% of polypropylene and 8-13% of talcum powder are evenly mixed and added into a second feed inlet of the double-screw extruder to be extruded and granulated.The material has the advantages that temperature resistance and corrosion resistance are high, physical property indexes of the material are hardly reduced at a high temperature, and solid-liquid separation work under a relatively high temperature environment can be achieved.

Description

technical field [0001] The invention relates to the technical field of filter press diaphragms, in particular to a high temperature and corrosion resistant diaphragm core material. Background technique [0002] At present, the material of the diaphragm is made of polypropylene plus elastomer toughening, and its disadvantage is that the material properties are still plastic properties; the main component is polypropylene, which has entered a high elastic state under high temperature conditions, and its rigidity and flexural modulus are sharply reduced. The deformation cannot be recovered after the temperature is lowered; therefore, a diaphragm core material with high temperature resistance and corrosion resistance is needed. Contents of the invention [0003] The purpose of the present invention is to overcome the shortcomings of the existing diaphragm in high temperature environment, and provide a core material of the diaphragm with high temperature resistance and corrosio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/16C08L53/00C08K3/34C08K5/14
CPCC08L23/16C08L2201/08C08L53/00C08K3/34C08K5/14
Inventor 杨振民张居亮刘建成张振利陈卫李宪勇张志军刘少磊郭春瀛魏冰殷培博
Owner HENAN DAZHANG FILTER EQUIP CO LTD
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