Additive processing of fluoropolymers
A technology of polymers and copolymers, which is applied in the direction of additive processing, additive processing of mixtures of solid materials and liquid materials, additive processing of liquid materials, etc., and can solve problems such as experimental details that do not provide printing conditions and characteristics of printing examples
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Embodiment 1
[0401] Example 1 (comparison of surface roughness)
[0402] Through 3D printing, a PTFE dispersion and an acrylate binder (using PICO 2 from ASIGA Anaheim Hills, California, USA) from Anaheim Hills, California, USA, are used as a "3D printer" (energy source: 385nm LED), produced by three-dimensional illumination technology (photopolymerization curing technology)) to prepare products including dome-shaped features (height is about 1mm, bottom is about 1mm by 1mm), and then thermally dried and sintered, and combined with The same feature structure prepared by conventional machining is compared.
[0403] The product has a white appearance and has a shape specified by the electronic file. The surface roughness (Ra) of the product was determined to be 4.99 μm. The same dome-shaped article was prepared from PTFE ingots but using conventional machining (CNC). The surface roughness was found to be 9.99 μm.
Embodiment 2
[0405] The 3D printable composition was prepared by the following steps: weighed PTFE dispersion (320.07g; solid content 58%wt, average particle size: 190nm, fluorinated emulsifier less than 50ppm, PTFE content based on non-ionic aliphatic stable emulsifier is 6%) into the bottle and then stirred by a laboratory spinner. In a separate bottle, combine the binder material (28g acrylic SR415 from Sartomer Americas, Exton, PA, USA) from Sartomer Americas, Exton, PA, USA and Sartomer Americas (Sartomer Americas, Exton, PA, USA) SR433) was mixed with water (80g), and then weighed, and a photoinitiator (from Sigma-Aldrich of St. Louis, Missouri, USA) was added. Aldrich, St Louis, MO, USA) BHT (0.46g), inhibitors and optical brighteners (from Mayzo, Inc. Suwanee, GA, USA) BenetexOB-M1 (from Mayzo, Inc.Suwanee, GA, USA) 0.23g)), and then stirred by a laboratory spinner. After complete mixing, slowly add the binder mixture to the dispersion and the combined solution to form a complete p...
Embodiment 3
[0412] Create a solid model (CAD) file of the test part with several wall thicknesses. The rectangular article has a length of 49 mm and a width of 30 mm. It has a circumferential wall with a thickness of 1.5 mm along its length. The circumferential walls along its width have thicknesses of 5 mm and 10 mm, respectively. The article also has a series of inner walls that are arranged parallel to the width of the article and extend along the width of the article, thereby connecting the two circumferential walls along the length of the article. These inner walls have different thicknesses (1.5mm, 1.0mm, 3.0mm, 3.5mm, and spaced at a distance of 5.0mm).
[0413] Load the CAD file into the ASIGA COMPOSER combinatorial construction software, and generate and transmit the construction command to the ASIGA PICO 2 HD SLA 3D printer. The construction command includes a single part and the thickness block is placed flat on the construction platform on. Pour the printable solution (essent...
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Abstract
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