Preparation method of anti-static polytetrafluoroethylene thin film
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A polytetrafluoroethylene, antistatic technology, applied in the field of preparation of polytetrafluoroethylene antistatic film, can solve the problems of complex process, unstable product performance, high cost, etc., and achieve simple process, prominent chemical inertness, and convenient operation Effect
Inactive Publication Date: 2016-04-20
TIANJIN TIANSU SCI & TECH GROUP
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Problems solved by technology
With the rapid increase of PTFE production capacity, PTFE modification technology is strengthened, and new and efficient PTFE antistatic composite mat
Method used
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[0028] Example 1
[0029] A preparation method of polytetrafluoroethylene (PTFE) antistatic film includes the following preparation processes:
[0030] 1. PTFE resin blended with conductive carbon black
[0031] The raw materials are polytetrafluoroethylene (PTFE) dispersion resin and imported conductive carbon black. The PTFE resin is passed through a 5-20 mesh sieve. The conductive carbon black needs to be ground by a ball mill for at least 1 hour, and the mass ratio of the two is 100:0.5-5. Weigh PTFE resin and conductive carbon black according to the ratio, add them to the mixing tank, then weigh a certain amount of mineral spirits, add to the bucket, shake for at least 20 minutes, then place on the mixer for at least 30 minutes after mixing , Sieved, placed in an oven, and matured for 15h-20h at 20-60℃;
[0032] 2. Billet making of blends
[0033] Mix uniformly and matured PTFE and conductive carbon black blends and press them into a certain height blank under the condition of 0....
Example Embodiment
[0038] Example 2
[0039] The preparation process of a polytetrafluoroethylene (PTFE) antistatic membrane lining is the same as in Example 1. among them,
[0040] The ratio of raw materials: PTFE 2kg, conductive carbon black 20g; the particle size of polytetrafluoroethylene (PTFE) dispersion resin is 300μm, and the particle size of the conductive carbon black after grinding is about 10μm.
[0041] The raw material is DF-203 polytetrafluoroethylene (PTFE) dispersion resin, and the carbon black is Eborui conductive carbon black.
[0042] In a vacuum drying oven, after drying the two for 4 hours, weigh 2kg of PTFE and 20g of conductive carbon black according to the ratio of PTFE: conductive carbon black = 100:1, and first add the conductive carbon black into the ball mill , 200r / min high-speed operation for 45min, in order to grind its particle size to 10μm. Add PTFE resin and conductive carbon black to the mixing tank in layers, place it on the mixing machine, take it off after 30 min...
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Abstract
The invention relates to a preparation method of an anti-static polytetrafluoroethylene thin film, and belongs to the technical field of blending alloy. The preparation method of the anti-static polytetrafluoroethylene thin film comprises the following steps: (1) blending of polytetrafluoroethylene and conductive carbon black: adding polytetrafluoroethylene dispersion resin and the conductive carbon black according to the mass ratio of 100: (0.5-5) into isoparaffin organic solvent oil, uniformly mixing through a mixing machine to obtain a mixture, screening the mixture, and curing for 15h or more; (2) preparation of a blank from a co-mixture: under the condition of 0.3 to 1.0 MPa, pressing a material blank in a bidirectional pressing manner; (3) push pressing: adding the material blank into a material cavity of a plunger type extruding machine, heating the material cavity to 25 to 50 DEG C, and pushing to form a round stick under the condition of 1 to 10 MPa; (4) co-mixture pressing: pressing a polytetrafluoroethylene oil-containing base band on a calender, and then performing deoiling, stretching and high-temperature sizing to prepare the anti-static polytetrafluoroethylene thin film. The preparation method has a simple technology and is convenient to operate; the product, namely the anti-static polytetrafluoroethylene thin film has the advantages of excellent antistatic property, high-temperature resistance, corrosion resistance, abrasion resistance, high intensity, long service life and the like.
Description
technical field [0001] The invention belongs to the technical field of blended alloys, in particular to a preparation method of a polytetrafluoroethylene antistatic film. Background technique [0002] At present, polytetrafluoroethylene (PTFE) has excellent performance and high and low temperature resistance. Aqua regia and any concentration of strong acid, strong alkali, organic solvent, etc.; good weather resistance, with the best aging life in plastics; good self-lubrication, and its electrical properties are excellent, high insulation resistance, small dielectric constant, It is a polymer material with excellent performance. Process it into PTFE rods, pipes, plates, turned plates, raw material belts, etc., as corrosion-resistant materials in chemical equipment, such as various corrosive fluid medium pipelines, various anti-corrosion equipment, container linings, etc. , linings, etc., advanced insulating materials in the electrical and electronic industry, high-frequenc...
Claims
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Application Information
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