CN1132659C

CN1132659C - Method for making high molecular filter material

Info

Publication number: CN1132659C
Application number: CN 00110213
Authority: CN
Inventors: 王珂伟
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-03-17
Filing date: 2000-03-17
Publication date: 2003-12-31
Anticipated expiration: 2020-03-17
Also published as: CN1265932A

Abstract

The present invention relates to a method for producing high molecular filter materials. The present invention comprises the steps that polytetrafluorethylene passes a sieve from 80 to 150 meshes, screenings granularity is determined according to different filtration accuracy of finished products, and the granularity difference is from 20 to 40 meshes; the polytetrafluorethylene which is a main material is mixed with foaming agents according to the proportion from 1: 0.05 to 0.08; the mixture is sieved and is filled in a mould, the surface of which is coated with silicon oil, and the mixture is tamped; the tamped polytetrafluorethylene mixture and the mould are put in a high temperature furnace for sintering, the heating is stopped when the furnace temperature is from 180 to 220 DEG C, and the temperature is preserved for 30 minutes; the mould and the filler are taken out of the furnace and are put into water, and the finished product can be obtained after the demoulding.

Description

The manufacture method of high molecular filter material

The invention provides a kind of manufacture method of high molecular filter material, this method gained produces brilliant, the suitable especially filtering material of making equipment lubrication system and hydraulic machinery middle filtrator.Belong to the filtering material technical field.

Filtering material is divided into two kinds of thin bed filtration material and Depth Filtrations substantially.The thin layer filter material has wire netting, filter paper, fabric etc.They block the impurity particle in the fluid in certain range of application, are actually the effect of playing a screen cloth.The deep layer filter material has then required certain thickness filtering layer, and fluid is held back impurity by Depth Filtration.It is representative that the deep layer filter material sinters the tubulose filter material into the powder sintered and stupalith of metal metallurgy smelting usually.Has depth type filtration, advantages such as porosity height, intensity height, life-span length.But, owing to the deep layer filter material is that metal-powder or stupalith sintering form, thereby exist filtering accuracy restive, complex manufacturing technology, the flushing regeneration times is limited and relatively more difficult, the big deficiency that waits of weight.

Deficiency at existing deep layer filter material technology, purpose of the present invention provides a kind of filtering accuracy height that produces, and product flushing regeneration is easy, in light weight, it is simple to obtain different filtering accuracy social estate system finished product technologies, the deep layer filter material that cost is low---the manufacture method of high molecular filter material.

The inventive method, form by following step:

1. tetrafluoroethylene is crossed the 80-150 mesh sieve, pressed the different filtering accuracy of final product, determine the screen underflow granularity, require granularity difference 20-40 order;

With major ingredient tetrafluoroethylene and whipping agent in 1: (0.05-0.08) ratio is mixed thoroughly;

3. sieve back mixture and tamping of the mould filling that scribbles silicone oil to the surface;

4. the teflon mixture of tamping is put into high temperature in the lump together with mould and protect sintering, in the time of furnace temperature 180-220 ℃, stop heating, be incubated 30 fens;

5. mould and weighting material are taken out from stove together, put into water, the demoulding promptly gets finished product.

The macromolecule filter material that adopts the inventive method to make, the hole of filter material are the dendritic of bending, and filtration channel extends in all direction random.The filter material wall thickness is to be formed by connecting by irregular spherical junctions crystal, forms many honeybee snail formulas hole between the xln.This structure of high molecular filter material in filtration procedure, just can be stayed the corner of micropore with the mechanical wear impurity card littler than micro-pore diameter or delivers in the hole, can not pass filtering layer with filtrate.The filtering accuracy of filter material is corresponding to be improved.A large amount of dirts can be accumulated in the hole of honeycomb fashion in the filter material, and this feature then can prolong work-ing life of filter material significantly.Moreover crystallization ball piece is made up of plastic material, and meeting produces flow and forms new duct under certain pressure, thereby has improved the durability of filter material.

By experiment, common paper filter material and high molecular filter material are made performance relatively to be found, has identical permeability, papery filter material precision is 10 μ m, when the high molecular filter material precision is 5 μ m, 10 μ m papery filter material purolators lead to oily 3T, filter paper punctures, and the high molecular filter material of 5 μ m precision reaches during oil strain 17.1T and cleans the life-span.Test also confirms, high molecular filter material along with the amount that is blocked impurity increases, also can produce certain pressure reduction when reaching certain mistake oil mass.But can form a stability of flow district under some pressure reduction, this moment, pressure reduction can not increase again.Only served as oil mass when enough big, pressure reduction just obviously increases again, shows that polymer oil strain material need clean at this moment.

Test shows that high molecular filter material is compared with the papery filter material, and at filtering accuracy, in work-ing life, items such as durability have tangible performance advantage.

Adopt the inventive method, can make filtering accuracy and be 2,5,10,20 microns high molecular filter material.

Below by embodiment, the inventive method is further described below:

Embodiment one:

1. tetrafluoroethylene sieves, and sieve aperture is 100 orders, and its minus mesh after 130 orders, is continued to employ between the 100-130 order and expected;

2. major ingredient tetrafluoroethylene and whipping agent are mixed thoroughly in 1: 0.05 ratio, whipping agent is a fluorocarbon surfactant;

3. scribble to the surface and fill sieve back mixture in the cavity that forms between the stainless core pipe of silicone oil and outer tube, and tamping;

4. the teflon mixture of tamping is sent in the High Temperature Furnaces Heating Apparatus together with mould, when furnace temperature rises to 210-220 ℃, stops heating, is incubated 30 fens;

5. mould and weighting material are taken out from stove, put into the water demoulding, end sealing promptly gets finished product.

The present embodiment gained finished product filtering accuracy 10 μ m.

Embodiment two:

1. tetrafluoroethylene sieves, and sieve mesh 130 after 170 mesh sieves, is got its middle material with minus mesh;

2. tetrafluoroethylene and whipping agent are mixed thoroughly in 1: 0.06 ratio, whipping agent is a fluorocarbon surfactant;

3. filling mixt in the mould that is coated with silicone oil, and tamping;

4. incite somebody to action the tetrafluoroethylene and the blowing agent blends of tamping, deliver in the lump in the High Temperature Furnaces Heating Apparatus, when heating, be incubated 30 minutes to 200-210 ℃ together with mould;

5. mould and weighting material are taken out, put into the water demoulding, get finished product, an end closure is the high molecular filter material of filtering accuracy 5 μ m.

Embodiment three:

1. tetrafluoroethylene is sieved, sieve aperture 150 orders, screen underflow are left and taken the middle material of two sieves after 170 mesh sieves;

2. with tetrafluoroethylene and whipping agent, mix thoroughly in 1: 0.08 ratio, whipping agent is a fluorocarbon surfactant;

3. filling mixt in the mould that is coated with silicone oil, and tamping;

4. incite somebody to action the tetrafluoroethylene and the blowing agent blends of tamping, deliver in the lump in the High Temperature Furnaces Heating Apparatus, heat to 190-200 ℃ of insulation 30 minutes together with mould;

5. mould and weighting material are taken out, put into the water demoulding, can obtain the macromolecule filter material that filtering accuracy is 2 μ m.

Embodiment four:

1. tetrafluoroethylene is sieved, sieve aperture 80 orders, screen underflow are left and taken the middle material of two sieves after 120 mesh sieves;

2. tetrafluoroethylene and whipping agent fluorocarbon surfactant are pressed 1: 0.05 mixed, mix thoroughly;

3. filling mixt in the stainless steel mould that is coated with silicone oil, and tamping;

4. the tetrafluoroethylene and the blowing agent blends of tamping are sent in the High Temperature Furnaces Heating Apparatus together with mould, when heating to 180-200 ℃, stop temperature, are incubated 30 minutes;

5. weighting material is taken out together with mould, put into the water demoulding, obtaining filtering accuracy is the high score filtering material of 20 μ m.

Claims

1. the manufacture method of a high molecular filter material is characterized in that it comprises following step:

(1), crosses the 80-150 mesh sieve, screen underflow granularity difference 20-40 order with tetrafluoroethylene;

(2) with tetrafluoroethylene and whipping agent in 1: (0.05-0.08) ratio is mixed thoroughly, and whipping agent is a fluorocarbon surfactant;

(3) mixture after the surface scribbles the mould filling sieve of silicone oil, and tamping;

(4) teflon mixture of tamping is put into the High Temperature Furnaces Heating Apparatus sintering in the lump together with mould, in the time of furnace temperature 180-220 ℃, stop heating, be incubated 30 fens;

(5) mould and weighting material are taken out from stove together, put into water, the demoulding promptly gets makes crystalline substance.

2. the manufacture method of high molecular filter material according to claim 1 is characterized in that it may further comprise the steps:

(1) tetrafluoroethylene sieves, and sieve aperture is 100 orders, and screen underflow after 130 mesh sieves, is left and taken the middle material of two sieves;

(2) major ingredient tetrafluoroethylene and whipping agent are mixed thoroughly in 1: 0.05 ratio, whipping agent is a fluorocarbon surfactant;

(3) scribble to the surface and fill sieve back mixture in the cavity that forms between the stainless core pipe of silicone oil and outer tube, and tamping;

(4) teflon mixture of tamping is sent in the High Temperature Furnaces Heating Apparatus together with mould, when furnace temperature rises to 210-220 ℃, stops heating, is incubated 30 fens;

(5) with taking out in mould and the filling materialization stove, put into the water demoulding, end sealing promptly gets finished product;

3. the manufacture method of high molecular filter material according to claim 1 is characterized in that it may further comprise the steps:

(1) tetrafluoroethylene sieves, and sieve mesh 130 after 170 mesh sieves, is continued to employ the middle material of two sieves with screen underflow;

(2) tetrafluoroethylene and whipping agent are mixed thoroughly in 1: 0.06 ratio, whipping agent is a fluorocarbon surfactant;

(3) in the mould that is coated with silicone oil, fill mixed contain thing and tamping;

(4) incite somebody to action the tetrafluoroethylene and the blowing agent blends of tamping, deliver in the lump in the High Temperature Furnaces Heating Apparatus, when heating, be incubated 30 minutes to 200-210 ℃ together with mould;

(5) mould and weighting material are taken out, put into the water demoulding, get finished product.

4. the manufacture method of high molecular filter material according to claim 1 is characterized in that it may further comprise the steps:

(1) tetrafluoroethylene is sieved, sieve aperture 150 orders are crossed 170 mesh sieves with screen underflow, continue to employ the middle material of two sieves;

(2) with tetrafluoroethylene and whipping agent, to mix thoroughly in 1: 0.08 ratio, whipping agent is a fluorocarbon surfactant;

(3) filling mixt in the mould that is coated with silicone oil, and tamping;

(4) incite somebody to action the tetrafluoroethylene and the blowing agent blends of tamping, deliver in the lump in the High Temperature Furnaces Heating Apparatus, heat to 190-200 ℃ of insulation 30 minutes together with mould;

(5) mould and weighting material are taken out, put into the water demoulding, can obtain finished product.

5. the manufacture method of high molecular filter material according to claim 1 is characterized in that it may further comprise the steps:

(1) tetrafluoroethylene is sieved, sieve aperture 80 orders are crossed 120 mesh sieves with screen underflow, continue to employ the middle material of two sieves;

(2) tetrafluoroethylene and whipping agent fluorocarbon surfactant are pressed 1: 0.05 mixed, mix thoroughly;

(3) filling mixt in the stainless steel mould that is coated with silicone oil, and tamping;

(4) tetrafluoroethylene and the blowing agent blends of tamping are sent in the High Temperature Furnaces Heating Apparatus together with mould, when heating to 180-200 ℃, are incubated 30 minutes;

(5) weighting material is taken out together with mould, put into the water demoulding, obtain finished product.