CN102205656B - Preparation method of continuous long bulked polytetrafluoroethylene panel - Google Patents
Preparation method of continuous long bulked polytetrafluoroethylene panel Download PDFInfo
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- CN102205656B CN102205656B CN 201110098806 CN201110098806A CN102205656B CN 102205656 B CN102205656 B CN 102205656B CN 201110098806 CN201110098806 CN 201110098806 CN 201110098806 A CN201110098806 A CN 201110098806A CN 102205656 B CN102205656 B CN 102205656B
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- steel band
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- expanded polytetrafluoroethylsealing
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- sintering
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Abstract
The invention relates to a preparation method of a continuous long bulked polytetrafluoroethylene panel. The method comprises the following steps of: directly coating a set biaxially-oriented polytetrafluoroethylene film from a biaxial orientation machine to a surrounding steel belt; controlling a rotary speed of the surrounding steel belt to be accordant with a forward speed of the biaxial orientation machine, wherein the speed is 2 to 10 metres per minute; after finishing coating, putting a steel belt coil which is coated with the polytetrafluoroethylene film into a sintering furnace for sintering, wherein a temperature is 350 to 390 DEG C and heat preservation time is 5 to 20 h, and naturally cooling to room temperature; and taking down a sintered bulked polytetrafluoroethylene panel from the steel belt to obtain the continuous long bulked polytetrafluoroethylene panel. The continuous long bulked polytetrafluoroethylene panel is produced by using the method, so overlapped processes are greatly simplified, the length of the continuous long bulked polytetrafluoroethylene panel is not influenced by equipment, and production efficiency is improved.
Description
Technical field
The invention belongs to technical field of plastic, be specifically related to a kind of continuous long expanded polytetrafluoroethylsealing preparation of plates method.
Background technology
Polytetrafluoroethylmaterial material has corrosion-resistant, against weather, and the advantages such as resistant of high or low temperature are widely used in the important departments such as defence and military, atomic energy, oil, radio, electric machinery, chemical industry, and the laudatory title of " King " is arranged.Than the polytetrafluoroethylmaterial material of traditional mold pressing or extrusion molding, the density of expanded polytetrafluoroethylsealing is lower, and creep resistant is stronger, has kept simultaneously the physical and chemical performance of many conventional P TFE, is desirable gasket seal material.
United States Patent (USP) 5964465 has been introduced the forming method of the low creep teflon seal tape of a kind of continuous length, and it surrounds film on the cylindrical shell, behind the sintering again helical cut become a continuously long band.Although with the biaxial tension band that the method can be grown continuously, the method is subject to the restriction of length and width, and need make longer wider band, needs the main equipment guarantee, the method inefficiency once can only be produced a continuous long band in addition.
Summary of the invention
The object of the invention is to overcome the prior art defective, a kind of new continuous long expanded polytetrafluoroethylsealing preparation of plates method is provided, simplify simultaneously production stage, enhance productivity.
A kind of new continuous long expanded polytetrafluoroethylsealing preparation of plates method that the present invention proposes, described continuous long expanded polytetrafluoroethylsealing sheet material is to be closed to the stretch polytetrafluoroethylraw thin layer is stacked by plurality of layers of double, is bonded through high temperature sintering, concrete steps are as follows:
1. dispersed polytetrafluoroethylresin resin is adopted the pasty state method of forming to make calendered film, make the expanded polytetrafluoroethylsealing film through biaxial tension;
2. hold: above-mentioned gained expanded polytetrafluoroethylsealing film directly is coated on the steel band from biaxial orientation stretching machine, and described steel band is structure in the form of a ring, regulates steel band rotating speed and biaxial orientation stretching machine pace and is consistent, and velocity interval is 2 ~ 10 m/mins; Steel band is made around the movement the expanded polytetrafluoroethylsealing film is held lamination, polytetrafluoroethylene film is fixed on the steel band after holding end;
3. sintering: the steel band that is coated with poly tetrafluoroethylene that 2. step is obtained is put into sintering furnace and is carried out sintering, is incubated 5 ~ 20 hours under 350 ~ 390 ℃ of temperature, closes afterwards electric heating and naturally cools to room temperature;
4. the steel band that is coated with poly tetrafluoroethylene that 3. step is obtained takes out from sintering furnace, and expanded polytetrafluoroethylsealing sheet material is taken off from steel band, namely gets required continuous long expanded polytetrafluoroethylsealing sheet material, then cuts out according to product requirement.
Among the present invention, step 1. described in the thickness of polytetrafluoroethylene film can be 0.01m ~ 0.5mm.
Among the present invention, step 1. described in steel band (3) material be stainless steel.
Beneficial effect of the present invention: utilize the method to produce continuous long expanded polytetrafluoroethylsealing sheet material and greatly simplified lamination process, product length is not affected by equipment simultaneously, enhances productivity.
Description of drawings
Fig. 1 is the moulding process figure of continuous long expanded polytetrafluoroethylsealing sheet material.
Number among the figure: 1 is biaxial orientation stretching machine, and 2 is the expanded polytetrafluoroethylsealing film, and 3 is steel band.
The specific embodiment
Further specify the present invention below by example, but the present invention not only is confined to following embodiment.
Embodiment 1:
(1) dispersed polytetrafluoroethylresin resin is adopted the pasty state method of forming make calendered film, make expanded polytetrafluoroethylsealing film 2 through biaxial tension.Film thickness is 0.05mm, and it directly is coated to around on the steel band 3 from biaxial orientation stretching machine 1, is 30m around steel band 3 length, and wide is 900mm, and thickness is 0.2mm.Adjustable ring is consistent around steel band 3 rotary speeies and biaxial orientation stretching machine 1 pace, and speed is 5 m/mins.Steel band 3 is made around the movement polytetrafluoroethylene film is held lamination, holds altogether 30 circles, polytetrafluoroethylene film is fixed on the steel band 3 after holding end.
(2) steel band 3 that step (1) gained is coated with poly tetrafluoroethylene is put into sintering furnace, is heated to 385 ℃ of insulations 8 hours, closes electric heating and freely is cooled to room temperature.
(3) steel band 3 that step (2) gained is coated with poly tetrafluoroethylene takes out from sintering furnace, continuous long expanded polytetrafluoroethylsealing sheet material is taken off from steel band 3, so just can make long 30m, wide 900mm, the continuous long expanded polytetrafluoroethylsealing plate of thick 1.5mm.
Embodiment 2:
(1) dispersed polytetrafluoroethylresin resin is adopted the pasty state method of forming make calendered film, make the expanded polytetrafluoroethylsealing film through biaxial tension.Film thickness is 0.1mm, and it directly is coated to around on the steel band 3 from biaxial orientation stretching machine 1, is 30m around steel band 3 length, and wide is 900mm, and thickness is 0.2mm.Adjustable ring is consistent around steel band 3 rotary speeies and biaxial orientation stretching machine 1 pace, and speed is 5 m/mins.Steel band 3 is made around the movement polytetrafluoroethylene film is held lamination, holds altogether 40 circles, polytetrafluoroethylene film is fixed on the steel band after holding end.
(2) steel band that step (1) gained is coated with poly tetrafluoroethylene is put into sintering furnace, is heated to 385 ℃ of insulations 12 hours, closes electric heating and freely is cooled to room temperature.
(3) steel band that step (2) gained is coated with poly tetrafluoroethylene takes out from sintering furnace, continuous long expanded polytetrafluoroethylsealing sheet material is taken off from steel band, can make long 30m, wide 900mm, the continuous long expanded polytetrafluoroethylsealing sheet material of thick 4mm, can obtain long 30m with the blade cutting, the continuous long expanded polytetrafluoroethylsealing band of wide 25mm.
Claims (3)
1. a continuous long expanded polytetrafluoroethylsealing preparation of plates method is characterized in that described continuous long expanded polytetrafluoroethylsealing sheet material is to be closed to the stretch polytetrafluoroethylraw thin layer is stacked by plurality of layers of double, is bonded through high temperature sintering, and concrete steps are as follows:
1. dispersed polytetrafluoroethylresin resin is adopted the pasty state method of forming to make calendered film, make the expanded polytetrafluoroethylsealing film through biaxial tension;
2. hold: above-mentioned gained expanded polytetrafluoroethylsealing film directly is coated on the steel band from biaxial orientation stretching machine, and described steel band is structure in the form of a ring, regulates steel band rotating speed and biaxial orientation stretching machine pace and is consistent, and velocity interval is 2 ~ 10 m/mins; Steel band is made around the movement the expanded polytetrafluoroethylsealing film is held lamination, polytetrafluoroethylene film is fixed on the steel band after holding end;
3. sintering: the steel band that is coated with poly tetrafluoroethylene that 2. step is obtained is put into sintering furnace and is carried out sintering, is incubated 5 ~ 20 hours under 350 ~ 390 ℃ of temperature, closes afterwards electric heating and naturally cools to room temperature;
4. the steel band that is coated with poly tetrafluoroethylene that 3. step is obtained takes out from sintering furnace, and expanded polytetrafluoroethylsealing sheet material is taken off from steel band, namely gets required continuous long expanded polytetrafluoroethylsealing sheet material, then cuts out according to product requirement.
2. a kind of continuous long expanded polytetrafluoroethylsealing preparation of plates method according to claim 1, the thickness that it is characterized in that polytetrafluoroethylene film described in step 1. (2) is 0.01mm ~ 0.5mm.
3. a kind of continuous long expanded polytetrafluoroethylsealing preparation of plates method according to claim 1 is characterized in that steel band (3) material is stainless steel described in step 1..
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN 201110098806 CN102205656B (en) | 2011-04-20 | 2011-04-20 | Preparation method of continuous long bulked polytetrafluoroethylene panel |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201110098806 CN102205656B (en) | 2011-04-20 | 2011-04-20 | Preparation method of continuous long bulked polytetrafluoroethylene panel |
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| CN102205656A CN102205656A (en) | 2011-10-05 |
| CN102205656B true CN102205656B (en) | 2013-03-20 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103707529B (en) * | 2013-12-27 | 2015-12-16 | 天津市天塑滨海氟塑料制品有限公司 | The numerical control sizing winding device of production wide cut PTFE base material film and manufacture method |
| CN106863858B (en) * | 2015-12-11 | 2019-01-04 | 中昊晨光化工研究院有限公司 | A kind of preparation method of expanded polytetrafluoroethylsealing composite membrane |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB961494A (en) * | 1961-01-14 | 1964-06-24 | Sumitomo Electric Industries | Polytetrafluoroethylene films and methods of fabricating same |
| US5964465A (en) * | 1996-03-13 | 1999-10-12 | W. L. Gore & Associates, Inc. | Low creep polytetrafluoroethylene form-in-place gasketing elements |
| JP3024935B2 (en) * | 1996-07-05 | 2000-03-27 | 株式会社竹中工務店 | Method of extending work safety net in steel structure and net mounting rod used in this method |
| KR100294904B1 (en) * | 1994-12-28 | 2001-09-17 | 구광시 | Polyimide film and preparation method thereof |
| CN101239503A (en) * | 2008-03-20 | 2008-08-13 | 上海市塑料研究所 | Method for forming continuous long polytetrafluoroethylene two-way stretch sealing material |
| CN101362831A (en) * | 2007-08-10 | 2009-02-11 | 泉州利昌塑胶有限公司 | Biaxial stretching polypropylene film and preparation method thereof biaxial stretching polypropylene film and preparation method thereof |
| CN101367280A (en) * | 2008-07-22 | 2009-02-18 | 黄山永新股份有限公司 | Antifreezing speed-sealing film and preparation method thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0324935A (en) * | 1989-06-22 | 1991-02-01 | Daicel Chem Ind Ltd | Preparation of film |
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Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB961494A (en) * | 1961-01-14 | 1964-06-24 | Sumitomo Electric Industries | Polytetrafluoroethylene films and methods of fabricating same |
| KR100294904B1 (en) * | 1994-12-28 | 2001-09-17 | 구광시 | Polyimide film and preparation method thereof |
| US5964465A (en) * | 1996-03-13 | 1999-10-12 | W. L. Gore & Associates, Inc. | Low creep polytetrafluoroethylene form-in-place gasketing elements |
| JP3024935B2 (en) * | 1996-07-05 | 2000-03-27 | 株式会社竹中工務店 | Method of extending work safety net in steel structure and net mounting rod used in this method |
| CN101362831A (en) * | 2007-08-10 | 2009-02-11 | 泉州利昌塑胶有限公司 | Biaxial stretching polypropylene film and preparation method thereof biaxial stretching polypropylene film and preparation method thereof |
| CN101239503A (en) * | 2008-03-20 | 2008-08-13 | 上海市塑料研究所 | Method for forming continuous long polytetrafluoroethylene two-way stretch sealing material |
| CN101367280A (en) * | 2008-07-22 | 2009-02-18 | 黄山永新股份有限公司 | Antifreezing speed-sealing film and preparation method thereof |
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| CN102205656A (en) | 2011-10-05 |
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Owner name: SHANGHAI PLASTIC RESEARCH INSTITUTE CO., LTD. Free format text: FORMER NAME: SHANGHAI PLASTIC INST. |
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Address after: Qingpu District Xujing town Shanghai city 201702 West Zhu Lu Road No. 1251 Patentee after: Co., Ltd of Shanghai Plastic Inst. Address before: 200090 Shanghai city Yangpu District Yangshupu Road No. 1664 Patentee before: Shanghai Plastic Inst. |