"Multilayer Film"
a technology of multi-layer film and adhesive property, applied in the field of multi-layer film, can solve the problem of difficult use as a single film, and achieve the effect of improving physical properties and superior adhesive properties of respective resins
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Benefits of technology
Problems solved by technology
Method used
Image
Examples
example 2
[0070]A multilayer film was produced by the same method as Example 1, except that thicknesses of respective layers were regulated to 50 μm / 80 μm / 60 μm at the time of coextrusion, and the produced sheet was stretched in the mechanical direction and the transverse direction with a stretch ratio of 3×3 times, respectively, by using a biaxial stretcher at 85° C. Physical properties of the produced film were measured and the results were tabulated in Table 1.
example 3
[0071]A multilayer film was produced by the same method as Example 2, except that stretching is performed with a stretch ratio of 3×4 times.
[0072]Physical properties of the produced film were measured and the results were tabulated in Table 1.
TABLE 1UnitExample 1Example 2Example 3DelaminationNot de-Not de-Not de-laminatedlaminatedlaminatedFilm thicknessμm68.12015TensileKg / cm254811001050strength (MD)TensileKg / cm257712201100strength (TD)Elongation (MD)%9.480100Elongation (TD)%1.95040Haze%2.41.01.0Oxygencc / m2day63197250permeability(23° C., RH 0%)Water vaporg / m2day187350376permeability(38° C., 100% RH)
[0073]As shown in Table 1, it can be seen that mechanical properties were improved and haze was lowered to increase transparency in the biaxially stretched film, as compared with the non-stretched film, and oxygen permeability and water vapor permeability were inversely proportional to the thickness of the stretched film.
example 4
[0074]A multilayer film was produced by preparing a sheet having the same thickness as Example 2 and then regulating a stretch ratio and a stretch temperature as shown in Table 2 below. The film thus produced was submerged within a warm water bath at 70 to 100° C. for 30 seconds, and a shrinkage ratio of each film was measured.
[0075]The results were tabulated in Table 2.
TABLE 2StretchStretchWater bathMDTDratiotemperaturetemperatureShrinkageShrinkage(MD × TD)(° C.)(° C.)ratio(%)ratio(%)1 × 370701.751 × 370801.751 × 370903.311.71 × 3701003.38.31 × 3807001.71 × 3808001.71 × 380901.751 × 3801001.7101 × 3907001.71 × 3908001.71 × 390901.71.71 × 3901001.73.33 × 170708.04.03 × 1708016.08.03 × 170906.04.03 × 4707023303 × 4708037283 × 4709038433 × 47010047453 × 4807023293 × 4808030383 × 4809035433 × 48010040473 × 4907020273 × 4908015293 × 4909021333 × 4901002538
[0076]As shown in Table 2, it can be seen that biaxial stretching further increases the shrinkage ratio as compared with uniaxial str...
PUM
| Property | Measurement | Unit |
|---|---|---|
| shrinkage ratio | aaaaa | aaaaa |
| temperature | aaaaa | aaaaa |
| temperature | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More