CN102529291B - Bonding method for polytetrafluoroethylene cellular material - Google Patents
Bonding method for polytetrafluoroethylene cellular material Download PDFInfo
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- CN102529291B CN102529291B CN201110446377.6A CN201110446377A CN102529291B CN 102529291 B CN102529291 B CN 102529291B CN 201110446377 A CN201110446377 A CN 201110446377A CN 102529291 B CN102529291 B CN 102529291B
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- polytetrafluoroethylene
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- aviation kerosine
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Abstract
The invention discloses a bonding method for a polytetrafluoroethylene cellular material, which comprises mixing polytetrafluoroethylene resin powder and aviation kerosene and preparing a polytetrafluoroethylene cellular thin film through procedures of extrusion, calendering, longitudinal extension and the like; and wrapping the polytetrafluoroethylene cellular thin film or multiple layers of polytetrafluoroethylene cellular thin films on the outer side of a polytetrafluoroethylene hollow fiber film, and obtaining the polytetrafluoroethylene cellular material through hot pressing at the high temperature. The bonding method for the polytetrafluoroethylene cellular material does not use adhesive, can ensure a final material to be 100% of polytetrafluoroethylene, and can not change the physical property of the material. The bonding method is simple in process and low in cost, and not only can be used for bonding the polytetrafluoroethylene cellular thin films, but also can be used for wrapping the polytetrafluoroethylene cellular thin films on the polytetrafluoroethylene hollow fiber film.
Description
Technical field
The present invention relates to the preparation method of macromolecular material, specifically relate to a kind of adhesive method of polytetrafluoroethylene (PTFE) poromerics.
Background technology
Can processing polytetrafluoroethylregenerated poromerics by stretch polytetrafluoroethylraw resin, adopt different equipment and process, can be processed into the shape such as film-type, hollow-fibre membrane.Polytetrafluoroethylmaterial material has waterproof, high temperature resistant, acid and alkali-resistance, the feature such as corrosion-resistant, the polytetrafluoroethylene (PTFE) poromerics of simultaneously pulling method processing has the features such as porosity prosperity, micropore size are easily controlled, apparent density is little, and therefore polytetrafluoroethylene (PTFE) poromerics is extensively used as waterproof moisture permeable fabric, air filting material, water filtration material, encapsulant etc.
While being used as waterproof moisture permeable fabric, one of them important indicator is water pressure resistance; While being used as air and water filtration material, one of them important indicator is filtering accuracy; Research shows that water pressure resistance, filtering accuracy etc. are all relevant with the size in aperture.In order to reduce aperture, multilayer polytetrafluoroethylarticles poromerics is bonded together, the intersection between nationality micropore can realize the object that reduces aperture.When the encapsulant, in order to reach the thickness of default encapsulant, also need multi-layer microporous film to be bonded together.For the doughnut membrane material as in water treatment, be to reduce aperture, also need be outside polytetrafluoroethylhollow hollow fiber membrane looping one deck polytetrafluoroethylene (PTFE) micropore flat sheet membrane, to improve the short grained efficiency of holding back.
Therefore, multilayer polytetrafluoroethylarticles poromerics need to be bondd in various fields.The method that tradition adopts mostly is adhesives, the characteristic that so final material will sacrificial section polytetrafluoroethylmaterial material itself.
We disclose a kind of two-layer polytetrafluoroethylene (PTFE) processing method in the patent of invention of having authorized " a kind of preparation method of PTFE film material for air degerming; patent No. ZL200510061828.9 ": teflon resin powder and fluid lubricant are mixed, through extruding, the processes such as calendering, two-layer while longitudinal stretching, cross directional stretch and thermal finalization forms.The method is mainly by two-layer polytetrafluoroethylene (PTFE) base band longitudinal stretching simultaneously, and reaches the object of bonding through follow-up processing.
Summary of the invention
The object of the present invention is to provide a kind of adhesive method of polytetrafluoroethylene (PTFE) poromerics, the method is that the operations such as process is extruded, calendering, longitudinal stretching are prepared polytetrafluoroethylmicroporous microporous membrane by mixed teflon resin powder aviation kerosine; By multilayer polytetrafluoroethylarticles microporous membrane, or polytetrafluoroethylmicroporous microporous membrane looping is in polytetrafluoroethylhollow hollow fiber membrane outside, and at high temperature hot pressing forms.
The technical solution used in the present invention is:
It is characterized in that comprising the steps:
(1) polytetrafluoroethylmicroporous microporous membrane: the teflon resin powder that is 1:0.2～0.28 by weight ratio and aviation kerosine are mixed, at the temperature of 20 ~ 40 DEG C, leave standstill 96 ~ 144 hours, then at the temperature of 40 ~ 80 DEG C, leave standstill 10 ~ 16 hours, make teflon resin powder, aviation kerosine fully mixed, form polytetrafluoroethylene (PTFE) material; By described polytetrafluoroethylene (PTFE) material at 20 ~ 30 DEG C, on harder, be pressed into cylindrical blank, cylindrical blank is extruded to club by pushing machine at the temperature of 40 ~ 60 DEG C, then club is rolled into polytetrafluoroethylene (PTFE) base band through calender at 40 ~ 60 DEG C; Described polytetrafluoroethylene (PTFE) base band is carried out to 2～5 times of longitudinal stretchings in the baking oven of 180 ~ 220 DEG C, and obtaining thickness is 5 microns ~ 80 microns polytetrafluoroethylmicroporous microporous membranes;
(2) bonding between polytetrafluoroethylene (PTFE) poromerics: by superimposed described multilayer polytetrafluoroethylarticles microporous membrane, carry out hot pressing; Or described polytetrafluoroethylmicroporous microporous membrane looping, in polytetrafluoroethylhollow hollow fiber membrane outside, is carried out to hot pressing, reach the bonding between polytetrafluoroethylene (PTFE) poromerics.
The degree of crystallinity of described teflon resin powder is 98 ~ 99.9%, and molecular weight is 2 × 10
6~ 1 × 10
7.
Described polytetrafluoroethylmicroporous microporous membrane contains aviation kerosine, and polytetrafluoroethylmicroporous microporous membrane is 1:0.03～0.15 to the weight ratio of aviation kerosine.
Described polytetrafluoroethylhollow hollow fiber membrane contains aviation kerosine, and polytetrafluoroethylhollow hollow fiber membrane is 1:0.03～0.15 to the weight ratio of aviation kerosine.
Described hot pressing temperature is 280～350 DEG C, and the time is 0.8～30 second, and pressure is 1～5 kilogram/square centimeter.
The present invention is compared with background technology, and the beneficial effect that the present invention has is:
(1) oil content in major control polytetrafluoroethylene (PTFE) poromerics of the present invention, and can realize the bonding between polytetrafluoroethylene (PTFE) and polytetrafluoroethylene (PTFE) under uniform temperature and pressure action.The mechanism of its bonding is the micro-structural that can form " fibril-node " due to polytetrafluoroethylene (PTFE) under external force and uniform temperature, wherein contain part lubricant (as aviation kerosine) and can promote interpenetrating and merging between polytetrafluoroethylmaterial material, thereby be issued to the bonding between polytetrafluoroethylene (PTFE) and polytetrafluoroethylene (PTFE) in the situation that does not use any adhesive.
(2) the present invention does not use adhesive, can guarantee that final material is 100% polytetrafluoroethylene (PTFE), can not change the physical property of material.
Technique of the present invention is simple, cost is low, not only can be used for the bonding between polytetrafluoroethylmicroporous microporous membrane, also can be used for polytetrafluoroethylmicroporous microporous membrane looping polytetrafluoroethylhollow hollow fiber membrane.
Detailed description of the invention
Embodiment 1:
(1) polytetrafluoroethylmicroporous microporous membrane: the F106 of Daikin company teflon resin powder and aviation kerosine (teflon resin powder is 1:0.2 to the weight ratio of aviation kerosine) are mixed evenly, at the temperature of 20 DEG C, leave standstill 96 hours, then at the temperature of 40 DEG C, leave standstill 10 hours, make toner, aviation kerosine fully mixed, form polytetrafluoroethylene (PTFE) material; Described polytetrafluoroethylene (PTFE) material, at 20 DEG C, is pressed into cylindrical blank on harder, blank is extruded to club by pushing machine at the temperature of 40 DEG C, then at 40 DEG C, be rolled into polytetrafluoroethylene (PTFE) base band through calender; Described polytetrafluoroethylene (PTFE) base band is carried out to 5 times of longitudinal stretchings in the baking oven of 220 DEG C, acquisition thickness is the polytetrafluoroethylmicroporous microporous membrane of 5 microns, polytetrafluoroethylmicroporous microporous membrane contains part aviation kerosine, and teflon resin powder is 1:0.03 to the weight ratio of aviation kerosine;
(2) bonding between polytetrafluoroethylene (PTFE) poromerics: by superimposed described two-layer polytetrafluoroethylmicroporous microporous membrane, carry out hot pressing, hot pressing temperature is 280 DEG C, and the time is 30 seconds, pressure is 1 kilogram/square centimeter, reaches the bonding of multilayer polytetrafluoroethylarticles microporous membrane.
Embodiment 2:
(1) polytetrafluoroethylmicroporous microporous membrane: 188 teflon resin powders and aviation kerosine (teflon resin powder is 1:0.28 to the weight ratio of aviation kerosine) that Zhejiang Ju Hua group is produced are mixed evenly, at the temperature of 40 DEG C, leave standstill 144 hours, then at the temperature of 80 DEG C, leave standstill 16 hours, make toner, aviation kerosine fully mixed, form polytetrafluoroethylene (PTFE) material; Described polytetrafluoroethylene (PTFE) material, at 30 DEG C, is pressed into cylindrical blank on harder, blank is extruded to club by pushing machine at the temperature of 60 DEG C, then at 60 DEG C, be rolled into polytetrafluoroethylene (PTFE) base band through calender; Described polytetrafluoroethylene (PTFE) base band is carried out to 2 times of longitudinal stretchings in the baking oven of 180 DEG C, acquisition thickness is the polytetrafluoroethylmicroporous microporous membrane of 80 microns, polytetrafluoroethylmicroporous microporous membrane contains part aviation kerosine, and teflon resin powder is 1:0.15 to the weight ratio of aviation kerosine;
(2) bonding between polytetrafluoroethylene (PTFE) poromerics: by superimposed 100 layers of described polytetrafluoroethylmicroporous microporous membrane, carry out hot pressing, hot pressing temperature is 350 DEG C, and the time is 0.8 second, pressure is 5 kilogram/square centimeters, reaches the bonding of multilayer polytetrafluoroethylarticles microporous membrane.
Embodiment 3:
(1) polytetrafluoroethylmicroporous microporous membrane: 188 teflon resin powders and aviation kerosine (teflon resin powder is 1:0.22 to the weight ratio of aviation kerosine) that Zhejiang Ju Hua group is produced are mixed evenly, at the temperature of 30 DEG C, leave standstill 120 hours, then at the temperature of 60 DEG C, leave standstill 12 hours, make toner, aviation kerosine fully mixed, form polytetrafluoroethylene (PTFE) material; Described polytetrafluoroethylene (PTFE) material, at 25 DEG C, is pressed into cylindrical blank on harder, blank is extruded to club by pushing machine at the temperature of 50 DEG C, then at 50 DEG C, be rolled into polytetrafluoroethylene (PTFE) base band through calender; Described polytetrafluoroethylene (PTFE) base band is carried out to 3 times of longitudinal stretchings in the baking oven of 200 DEG C, acquisition thickness is the polytetrafluoroethylmicroporous microporous membrane of 50 microns, polytetrafluoroethylmicroporous microporous membrane contains part aviation kerosine, and teflon resin powder is 1:0.1 to the weight ratio of aviation kerosine;
(2) bonding between polytetrafluoroethylene (PTFE) poromerics: by superimposed 50 layers of described polytetrafluoroethylmicroporous microporous membrane, carry out hot pressing, hot pressing temperature is 300 DEG C, and the time is 20 seconds, pressure is 3 kilogram/square centimeters, reaches the bonding of multilayer polytetrafluoroethylarticles microporous membrane.
Embodiment 4:
(1) polytetrafluoroethylmicroporous microporous membrane: the F106 of Daikin company teflon resin powder and aviation kerosine (teflon resin powder is 1:0.2 to the weight ratio of aviation kerosine) are mixed evenly, at the temperature of 20 DEG C, leave standstill 96 hours, then at the temperature of 40 DEG C, leave standstill 10 hours, make toner, aviation kerosine fully mixed, form polytetrafluoroethylene (PTFE) material; Described polytetrafluoroethylene (PTFE) material, at 20 DEG C, is pressed into cylindrical blank on harder, blank is extruded to club by pushing machine at the temperature of 40 DEG C, then at 40 DEG C, be rolled into polytetrafluoroethylene (PTFE) base band through calender; Described polytetrafluoroethylene (PTFE) base band is carried out to 5 times of longitudinal stretchings in the baking oven of 220 DEG C, acquisition thickness is the polytetrafluoroethylmicroporous microporous membrane of 5 microns, polytetrafluoroethylmicroporous microporous membrane contains part aviation kerosine, and teflon resin powder is 1:0.03 to the weight ratio of aviation kerosine;
(2) bonding between polytetrafluoroethylene (PTFE) poromerics: by described polytetrafluoroethylmicroporous microporous membrane looping in polytetrafluoroethylhollow hollow fiber membrane outside, described polytetrafluoroethylhollow hollow fiber membrane, contain part aviation kerosine, controlling teflon resin powder is 1:0.03 to the weight ratio of aviation kerosine, adopt the device in " a kind of polytetrafluoroethylhollow hollow fiber stretching device, application number 201010508798.2 " to process; Finally carry out hot pressing, hot pressing temperature is 280 DEG C, and the time is 30 seconds, and pressure is 1 kilogram/square centimeter, reaches the bonding between polytetrafluoroethylmicroporous microporous membrane and polytetrafluoroethylhollow hollow fiber membrane.
Embodiment 5:
(1) polytetrafluoroethylmicroporous microporous membrane: 188 teflon resin powders and aviation kerosine (teflon resin powder is 1:0.28 to the weight ratio of aviation kerosine) that Zhejiang Ju Hua group is produced are mixed evenly, at the temperature of 40 DEG C, leave standstill 144 hours, then at the temperature of 80 DEG C, leave standstill 16 hours, make toner, aviation kerosine fully mixed, form polytetrafluoroethylene (PTFE) material; Described polytetrafluoroethylene (PTFE) material, at 30 DEG C, is pressed into cylindrical blank on harder, blank is extruded to club by pushing machine at the temperature of 60 DEG C, then at 60 DEG C, be rolled into polytetrafluoroethylene (PTFE) base band through calender; Described polytetrafluoroethylene (PTFE) base band is carried out to 2 times of longitudinal stretchings in the baking oven of 180 DEG C, acquisition thickness is the polytetrafluoroethylmicroporous microporous membrane of 80 microns, polytetrafluoroethylmicroporous microporous membrane contains part aviation kerosine, and teflon resin powder is 1:0.15 to the weight ratio of aviation kerosine;
(2) bonding between polytetrafluoroethylene (PTFE) poromerics: by described polytetrafluoroethylmicroporous microporous membrane looping in polytetrafluoroethylhollow hollow fiber membrane outside, described polytetrafluoroethylhollow hollow fiber membrane, contain part aviation kerosine, controlling teflon resin powder is 1:0.15 to the weight ratio of aviation kerosine, adopt the device in " a kind of polytetrafluoroethylhollow hollow fiber stretching device, application number 201010508798.2 " to process; Finally carry out hot pressing, hot pressing temperature is 350 DEG C, and the time is 0.8 second, and pressure is 5 kilogram/square centimeters, reaches the bonding between polytetrafluoroethylmicroporous microporous membrane and polytetrafluoroethylhollow hollow fiber membrane.
Embodiment 6:
(1) polytetrafluoroethylmicroporous microporous membrane: 188 teflon resin powders and aviation kerosine (teflon resin powder is 1:0.22 to the weight ratio of aviation kerosine) that Zhejiang Ju Hua group is produced are mixed evenly, at the temperature of 30 DEG C, leave standstill 120 hours, then at the temperature of 60 DEG C, leave standstill 12 hours, make toner, aviation kerosine fully mixed, form polytetrafluoroethylene (PTFE) material; Described polytetrafluoroethylene (PTFE) material, at 25 DEG C, is pressed into cylindrical blank on harder, blank is extruded to club by pushing machine at the temperature of 50 DEG C, then at 50 DEG C, be rolled into polytetrafluoroethylene (PTFE) base band through calender; Described polytetrafluoroethylene (PTFE) base band is carried out to 3 times of longitudinal stretchings in the baking oven of 200 DEG C, acquisition thickness is the polytetrafluoroethylmicroporous microporous membrane of 50 microns, polytetrafluoroethylmicroporous microporous membrane contains part aviation kerosine, and teflon resin powder is 1:0.1 to the weight ratio of aviation kerosine;
(2) bonding between polytetrafluoroethylene (PTFE) poromerics: by described polytetrafluoroethylmicroporous microporous membrane looping in polytetrafluoroethylhollow hollow fiber membrane outside, described polytetrafluoroethylhollow hollow fiber membrane, contain part aviation kerosine, controlling teflon resin powder is 1:0.12 to the weight ratio of aviation kerosine, adopt the device in " a kind of polytetrafluoroethylhollow hollow fiber stretching device, application number 201010508798.2 " to process; Finally carry out hot pressing, hot pressing temperature is 300 DEG C, and the time is 20 seconds, and pressure is 3 kilogram/square centimeters, reaches the bonding between polytetrafluoroethylmicroporous microporous membrane and polytetrafluoroethylhollow hollow fiber membrane.
Claims (3)
1. an adhesive method for polytetrafluoroethylene (PTFE) poromerics, is characterized in that comprising the steps:
(1) polytetrafluoroethylmicroporous microporous membrane: the teflon resin powder that is 1:0.2～0.28 by weight ratio and aviation kerosine are mixed, at the temperature of 20 ~ 40 DEG C, leave standstill 96 ~ 144 hours, then at the temperature of 40 ~ 80 DEG C, leave standstill 10 ~ 16 hours, make teflon resin powder, aviation kerosine fully mixed, form polytetrafluoroethylene (PTFE) material; By described polytetrafluoroethylene (PTFE) material at 20 ~ 30 DEG C, on harder, be pressed into cylindrical blank, cylindrical blank is extruded to club by pushing machine at the temperature of 40 ~ 60 DEG C, then club is rolled into polytetrafluoroethylene (PTFE) base band through calender at 40 ~ 60 DEG C; Described polytetrafluoroethylene (PTFE) base band is carried out to 2～5 times of longitudinal stretchings in the baking oven of 180 ~ 220 DEG C, and obtaining thickness is 5 microns ~ 80 microns polytetrafluoroethylmicroporous microporous membranes;
(2) bonding between polytetrafluoroethylene (PTFE) poromerics: by superimposed described polytetrafluoroethylmicroporous microporous membrane, carry out hot pressing; Or described polytetrafluoroethylmicroporous microporous membrane looping, in polytetrafluoroethylhollow hollow fiber membrane outside, is carried out to hot pressing, reach the bonding between polytetrafluoroethylene (PTFE) poromerics;
Described polytetrafluoroethylmicroporous microporous membrane contains aviation kerosine, and polytetrafluoroethylmicroporous microporous membrane is 1:0.03～0.15 to the weight ratio of aviation kerosine;
Described polytetrafluoroethylhollow hollow fiber membrane contains aviation kerosine, and polytetrafluoroethylhollow hollow fiber membrane is 1:0.03～0.15 to the weight ratio of aviation kerosine.
2. the adhesive method of a kind of polytetrafluoroethylene (PTFE) poromerics according to claim 1, is characterized in that: the degree of crystallinity of described teflon resin powder is 98 ~ 99.9%, and molecular weight is 2 × 10
6~ 1 × 10
7.
3. the adhesive method of a kind of polytetrafluoroethylene (PTFE) poromerics according to claim 1, is characterized in that: described hot pressing temperature is 280～350 DEG C, and the time is 0.8～30 second, and pressure is 1～5 kilogram/square centimeter.
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| CN201110446377.6A CN102529291B (en) | 2011-12-28 | 2011-12-28 | Bonding method for polytetrafluoroethylene cellular material |
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| CN103448251B (en) * | 2013-09-17 | 2015-09-02 | 浙江格尔泰斯环保特材科技有限公司 | For the preparation of the polytetrafluoroethylfiber fiber film of superfine fibre |
| CN109550410A (en) * | 2018-12-13 | 2019-04-02 | 宁波水艺膜科技发展有限公司 | A kind of polytetrafluoroethylhollow hollow fiber membrane and manufacturing method |
| CN112477208A (en) * | 2020-11-06 | 2021-03-12 | 三峡新能源阳江发电有限公司 | Preparation method and application of single offshore wind power pile marine organism adhesion prevention based PTFE (polytetrafluoroethylene) film |
| CN113122942B (en) * | 2021-03-16 | 2022-06-10 | 苏州大学 | Large-scale preparation method of low-shrinkage polytetrafluoroethylene filaments |
Citations (3)
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|---|---|---|---|---|
| EP0970739A1 (en) * | 1998-07-08 | 2000-01-12 | Nitto Denko Corporation | Filter medium for air filters |
| CN1775847A (en) * | 2005-12-05 | 2006-05-24 | 浙江理工大学 | Method for preparing PTFE film material for air degerming |
| CN101091883A (en) * | 2007-04-13 | 2007-12-26 | 宁波大学 | Equipment for manufacturing composite membrane filter of polytetrafluoroethylene |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5385865A (en) * | 1977-01-06 | 1978-07-28 | Tokyo Tokushu Densen Kk | Multi lamination of polytetrafluoroethylene film |
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2011
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0970739A1 (en) * | 1998-07-08 | 2000-01-12 | Nitto Denko Corporation | Filter medium for air filters |
| CN1775847A (en) * | 2005-12-05 | 2006-05-24 | 浙江理工大学 | Method for preparing PTFE film material for air degerming |
| CN101091883A (en) * | 2007-04-13 | 2007-12-26 | 宁波大学 | Equipment for manufacturing composite membrane filter of polytetrafluoroethylene |
Non-Patent Citations (1)
| Title |
|---|
| JP昭53-85865A 1978.07.28 |
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