Method for adhering nanofiber sheet
A technology of nanofibers and nanofiber layers, which is applied in chemical instruments and methods, thin material processing, pharmaceutical formulations, etc., and can solve the problems of reduced rigidity of thin sheets and difficult to compliment usability, etc.
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Embodiment 1
[0045] Polylactic acid resin (manufactured by Toray Fine Chemicals Co., Ltd., trade name: L101) was dissolved in a mixed solvent of chloroform and dimethylformamide (80:20 weight ratio) to obtain a 9% solution. use this solution and image 3 The device of the electrospinning method shown is used to form a nanofiber layer on the surface of a film to be a substrate layer. The production conditions of nanofibers are as follows.
[0046] ・Applied voltage: 17kV
[0047] ·Distance between capillary and collector: 150mm
[0048] ·Aqueous solution discharge volume: 1ml / h
[0049] Environment: 25℃; 30%RH
[0050] The film used as the base layer was obtained by applying a silicone release treatment to one surface of a polyethylene terephthalate film (thickness: 25 μm; Taber stiffness: 0.08 mNm). The nanofiber layer is formed on the release treatment surface. The thickness of the formed nanofiber layer was 30 μm. The thickness of the nanofiber is 300 nm.
[0051] Thus, made by f...
Embodiment 2
[0053] Instead of the polyethylene terephthalate film used in Example 1, a mesh-like sheet made of polyethylene terephthalate (mesh: 120 mesh / inch; wire diameter: 63 μm) was used. No release treatment was performed on this mesh sheet. The air permeability resistance of the mesh sheet is 0.1 sec / 100ml or less, and the Taber stiffness is 0.13mNm. In addition to this, the same method as in Example 1 was used to obtain figure 1 Nanofibrous flakes of the indicated structure. Using the obtained nanofiber sheet, the same application as in Example 1 was carried out, and as a result, the nanofiber layer could be successfully applied to human skin.
Embodiment 3
[0055] Instead of the polyethylene terephthalate film used in Example 1, a weight per square meter of 78 g / m 2 And PPC paper with a thickness of 0.09mm. The paper had an air resistance of 21 seconds / 100ml and a Taber stiffness of 0.12mNm. In addition to this, the same method as in Example 1 was used to prepare figure 1 Nanofibrous flakes of the indicated structure. In addition, instead of the water used in Example 1, an aqueous solution of 15% pullulan [viscosity (25° C.): 59.9 g; viscosity (25° C., 10 rpm): 560 mPa·s] was used, and it was used in advance. The skin on the upper arm of a person is moist. Using the obtained nanofiber sheet, the same application as in Example 1 was carried out. As a result, the nanofiber layer could be applied to human skin more smoothly than in Example 1.
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