A kind of polyvinyl butyral film and preparation method thereof
A polyvinyl butyral and film technology, which is applied in adhesives, film/sheet adhesives, layered products, etc., can solve the problem of not being able to effectively balance the performance of polyvinyl butyral film and the film rolling process Requirements and other issues to achieve the effect of saving consumption, improving production efficiency and reducing production costs
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Embodiment 1
[0022] A preparation method of polyvinyl butyral film, is characterized in that, comprises the following steps:
[0023] (1) Preparing polyvinyl butyral resin: using a viscosity solution and a recycled resin with a hydroxyl content of 22wt% to obtain a PVB-1 resin with a viscosity of 75cp / 20°C, using a viscosity solution and a primary resin with a hydroxyl content of 19wt% Obtained the PVB-2 resin that viscosity is 261cp / 20 ℃, wherein said viscosity solution is the butanol solution of 5wt%;
[0024] (2) Mixing: 10 parts of PVB-1 resin and 100 parts of PVB-2 resin were mixed for 2 hours;
[0025] (3) Plasticizing extrusion: 1 part of plasticizer is mixed with 3 parts of mixed PVB resin by weight and extruded through the extruder, wherein the temperature inside the extruder is raised from the inlet temperature of 45°C to the outlet temperature of 165°C ℃;
[0026] (4) Cooling and shaping: the extruded PVB film is cooled and shaped using a water-cooling process, wherein the wat...
experiment example 1
[0049] According to the preparation methods of Examples 1-3 and Comparative Examples 1-3, 30 PVB films with the same size were prepared respectively.
[0050] In accordance with the national building materials industry standard: polyvinyl butyral (PVB) film for laminated glass (JC / T2166-2013), perform the performance tests listed in Table 1 on the above film, and the test results are shown in Table 1.
[0051] Table 1: Film Properties
[0052]
[0053] By the data shown in Table 1, it can be found that every quality of the PVB film prepared by the preparation method of the present invention is better than the national standard of PVB film, and its various performances have no significant difference with the performance of primary PVB film. However, many properties of the film prepared by using Comparative Example 1 or 3 do not meet the national standard of the national PVB film, and are also significantly different from the performance of the primary PVB film, especially the ...
experiment example 2
[0055] According to the preparation methods of Examples 1, 2 and Comparative Examples 1, 2, 30 pieces of PVB films of the same size were prepared respectively, and 30 pieces of laminated glass of the same size were obtained by using the same manufacturing process, the same glass and the above 30 pieces of PVB films .
[0056] In accordance with the national standard——Safety Glass for Buildings, Part 3: Laminated Glass (GB15763.3-2009), the performance tests listed in Table 2 were carried out on the laminated glass prepared above, and the test results are shown in Table 2.
[0057] Table 2: Properties of film-containing laminated glass
[0058]
[0059] From the data shown in Table 2, it can be found that the properties of the laminated glass containing the PVB film prepared by the preparation method of the present invention are not significantly different from those of the laminated glass containing the primary PVB film. However, the multiple properties of the laminated gl...
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