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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

Inactive Publication Date: 2015-05-27
TORAY IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Water vapor barrier properties can be imparted mainly by metal foil or metal vapor-deposition layer, but when the film is made into a bag shape and heat-sealed, although the water vapor barrier can be obtained by metal foil or metal vapor-deposition layer on the film surface However, the heat seal layer at the end of the bag cannot be protected by metal foil or metal vapor deposition layer, so there is a problem of water vapor infiltrating from the end

Method used

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Examples

Experimental program
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Effect test

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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Abstract

[Problem] To provide a laminated film with superior moldability, mold release property, suitability for processing, water vapor barrier property, and heat-sealing property. [Solution] A laminated film having a layer B, which has a polyethylene resin and / or a polypropylene resin as a main component, on at least one surface of a layer A, which has a cyclic olefin resin as a main component.

Description

technical field [0001] The present invention relates to a laminated film, and relates to a laminated film excellent in moldability, mold release property, processing suitability, water vapor barrier property, and heat sealability, and the composition of the laminated film is mainly composed of a cyclic olefin resin At least one side of the A layer has a B layer mainly composed of a polypropylene resin and / or a polyethylene resin. Background technique [0002] In recent years, in order to impart scratch resistance, weather resistance, color, and patterns to molded parts, or to impart photosensitive resin and electromagnetic wave shielding properties to circuit parts, methods of transferring functional resins to various parts are being promoted to meet The development of functional resin transfer films with these required properties is also continuing. [0003] For example, in building materials, auto parts, mobile phones, electrical products, etc., due to the improvement of ...

Claims

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Application Information

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IPC IPC(8): B32B27/00B32B27/32B65D65/02
CPCB32B27/08B32B27/32B32B27/325
Inventor 坂本光隆真锅功高桥弘造高田育
Owner TORAY IND INC
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