Method for producing water-resistant polyvinyl alcohol film
A technology of polyvinyl alcohol film and manufacturing method, which is applied in the direction of polarizing elements, can solve the problems of affecting mechanical properties and optical properties, not applicable to iodine-based polarizing films, and lack of versatility, and achieves high polarization and light transmittance , Reduce solubility, strong versatility
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0045] The manufacture method of the water-resistant polyvinyl alcohol film of the present embodiment comprises the following steps:
[0046] a. Solution preparation: take by weight:
[0047]
[0048] Among them, the degree of polymerization of polyvinyl alcohol is 2600, the degree of saponification is 99.7%; the pH value of the solution is 7;
[0049] b. Make a polyvinyl alcohol polarizing film: mix the above-mentioned raw materials, heat and stir at 80°C until completely dissolved, leave to defoam, and obtain a PVA film with a thickness of 76 μm by casting method;
[0050] The prepared PVA film was immersed in a dyeing tank (30°C) containing 3g / L iodine and 30g / L potassium iodide for 180s, while stretching at a rate of 1.5 times, and then the film was washed in a water bath at 30°C for 10s. Remove the iodine / potassium iodide solution on the surface, then immerse it in a solution containing 20g / L boric acid and 12g / L potassium iodide for fixation treatment, and simultane...
Embodiment 2
[0053] The manufacture method of the water-resistant polyvinyl alcohol film of the present embodiment comprises the following steps:
[0054] a. Solution preparation: take by weight:
[0055]
[0056] Among them, the degree of polymerization of polyvinyl alcohol is 6000, the degree of saponification is 99.1%; the pH value of the solution is 6;
[0057] b. Make a polyvinyl alcohol polarizing film: mix the above raw materials, heat and stir at 80° C. until completely dissolved, leave to defoam, and obtain a PVA film with a thickness of 74 μm by casting.
[0058] The prepared PVA film was immersed in a dyeing tank (30°C) containing 3g / L iodine and 30g / L potassium iodide for 180s, while stretching at a rate of 1.5 times, and then the film was washed in a water bath at 30°C for 10s. Remove the iodine / potassium iodide solution on the surface, then immerse in a solution containing 20g / L boric acid and 12g / L potassium iodide for fixation treatment, and simultaneously perform unia...
Embodiment 3
[0061] The manufacture method of the water-resistant polyvinyl alcohol film of the present embodiment comprises the following steps:
[0062] a. Solution preparation: take by weight:
[0063]
[0064] Among them, the degree of polymerization of polyvinyl alcohol is 1500, the degree of saponification is 99.8%; the pH value of the solution is 8;
[0065] b. Make a polyvinyl alcohol polarizing film: mix the above raw materials, heat and stir at 80° C. until completely dissolved, let stand for defoaming, and obtain a PVA film with a thickness of 75 μm by casting method.
[0066] The prepared PVA film was immersed in a dyeing tank (30°C) containing 3g / L iodine and 30g / L potassium iodide for 180s, while stretching at a rate of 1.5 times, and then the film was washed in a water bath at 30°C for 10s. Remove the iodine / potassium iodide solution on the surface, then immerse in a solution containing 20g / L boric acid and 12g / L potassium iodide for fixation treatment, and simultaneous...
PUM
| Property | Measurement | Unit |
|---|---|---|
| thickness | aaaaa | aaaaa |
| thickness | aaaaa | aaaaa |
| thickness | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More