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Bi-material high-resiliency diaphragm

A high-resilience, diaphragm technology, applied in the field of filter press diaphragms, can solve the problems of product scrap, cannot be reset, cannot be restored, etc., and achieve the effect of prolonging service life, not producing stress relaxation, and stable hydrolysis.

Inactive Publication Date: 2019-04-05
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 and elastomer toughened. The disadvantage is that the material properties are still plastic properties. It is rigid at room temperature, not easy to deform, and cannot be restored after deformation. In the reciprocating process of stretching and resetting, the material will relax after a period of time, the deformation cannot be reset, and the product will be scrapped; therefore, a dual-material high-resilience diaphragm is needed

Method used

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  • Bi-material high-resiliency diaphragm

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] A double-material high-resilience diaphragm, weighing 28-40% SEBS, 20-40% white oil, 20-30% polypropylene, 8-15% high-density polyethylene, and 3-6 nanometer calcium carbonate by weight % and antioxidant 0.2-0.5%.

[0014] The beneficial effects of the present invention are: SEBS does not contain unsaturated double bonds, so it has good stability and aging resistance; polypropylene is a semi-crystalline thermoplastic; it has high impact resistance, strong mechanical properties, Resistant to a variety of organic solvents and acid and alkali corrosion; high-density polyethylene is a translucent shape with high crystallinity and a certain degree of non-polar surface; its crystallinity is 80%~90%, and the softening point is 125~135℃ , the use temperature can reach 100°C; the melting temperature is 120~160°C, it has good heat resistance and cold resistance, good chemical stability, high rigidity and toughness, good mechanical strength; dielectric properties, environmental re...

Embodiment 2

[0016] A double-material high-resilience diaphragm, which weighs SEBS33%, polypropylene 22%, high-density polyethylene 9%, nano-calcium carbonate 5% and antioxidant 0.3% by weight, mixes them all uniformly, and Put it into a twin-screw extruder, then inject 30% white oil, and extrude and granulate to obtain the core material of the high-resilience diaphragm; the SEBS uses polystyrene as the terminal segment, and polybutadiene is hydrogenated The obtained ethylene-butene copolymer is a linear three-block copolymer of the middle elastic block; the white oil is an industrial grade white oil; the polypropylene is copolymerized or homopolymerized; the antioxidant The agent is antioxidant 168 or antioxidant 1010; the nano-calcium carbonate can be replaced by talcum powder of more than 3000 mesh.

[0017] After feeding and mixing, the diaphragm core material is prepared according to the process requirements. The performance test data is as follows:

[0018]

[0019] It can be se...

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Abstract

The invention relates to a bi-material high-resiliency diaphragm. 33% of SEBS, 22% of polypropylene, 9% of high-density polyethylene, 5% of nano-calcium carbonate and 0.3% of antioxidants are weighedby weight, uniformly mixed, placed into a double-screw extruder, injected with 30% of white oil, extruded and granulated to obtain a high-resiliency diaphragm core material. The bi-material high-resiliency diaphragm has the advantages of high elasticity and long service life.

Description

technical field [0001] The invention relates to the technical field of a diaphragm for a filter press, in particular to a dual-material high-resilience diaphragm. Background technique [0002] At present, the material of the diaphragm is made of polypropylene and elastomer toughened. The disadvantage is that the material properties are still plastic properties. It is rigid at room temperature, not easy to deform, and cannot be restored after deformation. During the reciprocating process of stretching and resetting, the material will relax after a period of time, the deformation cannot be reset, and the product will be scrapped; therefore, a dual-material high-resilience diaphragm is needed. Contents of the invention [0003] The object of the present invention is to provide a dual-material high-resilience diaphragm with high elasticity and long service life in order to overcome the deficiencies of the prior art. [0004] The object of the present invention is achieved in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L53/02C08L23/12C08L23/14C08L23/06C08L91/06C08K3/26C08K5/134C08K5/526C08J5/18
CPCC08J5/18C08J2353/02C08J2423/06C08J2423/12C08J2423/14C08J2491/06C08K5/1345C08K5/526C08K2003/265C08K2201/011
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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