Laminated film
A laminated film, lamination technology, applied in the direction of layered products, synthetic resin layered products, flexible coverings, etc., can solve the problem of water vapor infiltration, heat sealing layer at the end of the bag body can not be affected by metal foil or metal. Evaporated layer protection and other issues, to achieve the effect of excellent heat sealability
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Embodiment 1
[0305] A 3-layer structure is formed. The composition of each layer is as shown in the table, respectively supplied to a single-screw extruder (L / D = 28), melted at a supply temperature of 240°C and a subsequent temperature of 260°C, and passed through a filter with a filtration accuracy of 20 μm. After the disc is filtered, it is stacked in the layer B / A layer / B layer (refer to the attached table for the thickness ratio of each layer) in the layerer installed on the upper part of the die, and then it is discharged from the T-shaped die in the form of a film to the control panel. Warm to 85°C on a metal roll (SRa=0.03µm). At this time, it was nipped (nip pressure: 0.2 MPa) with rubber rollers (SRa=0.6 μm) to obtain a laminated film with a thickness of 100 μm. The obtained film was evaluated by the method described in (1) to (16). In addition, regarding the surface roughness SRa of the metal roller and the rubber roller, a triacetyl cellulose film (manufactured by Bioden, dis...
Embodiment 2
[0307] A laminated film was obtained in the same manner as in Example 1 except that the composition of the B layer was changed to LMDPE. The obtained film was evaluated by the methods described in (1) to (16), and almost the same results as in Example 1 were obtained.
Embodiment 3
[0309] A laminated film was obtained in the same manner as in Example 1 except that the composition of the B layer was changed to LDPE. When the obtained film was evaluated by the method described in (1)-(16), it was inferior to Example 1 in press heat resistance.
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