JP3249261U - A laminated insulation panel that prevents the thick and thin foam from bending when heat laminating the PET film. - Google Patents

Abstract

A heat insulating panel that suppresses expansion and contraction due to heat and prevents curvature is provided.
[Solution] The insulation material is less than 15 mm thick and made of a foam 4, either an extruded type expanded polystyrene or an extruded type inflation foam made of polystyrene resin, and a polyester terephthalate (PET) multilayer film made by laminating an aluminum foil laminate film or an aluminum-vapor-deposited PET film 1 with OPS (biaxially oriented polystyrene) 3 as an adhesive layer, which is heat-fused with a heated roller to form an integrated product, thereby preventing the foam from curving due to expansion and contraction caused by overheating.
[Selected Figure] Figure 1

Description

This invention relates to an insulation panel in which a multilayer film is laminated with an EVA film using an adhesive layer of OPS (biaxially oriented polystyrene) or molten polyethylene and a thin polystyrene resin insulation material less than 15 mm thick, and then heated and fused with a hot roller to form an integrated film, in which curvature caused by expansion and contraction of the insulation material due to overheating is prevented by laminating aluminum foil or aluminum vapor deposition film.

Conventional insulating panels are made of thin foam having a thickness of 15 mm or less and are used to provide insulation for food and other boxes and for lining thin steel plates.

The technique of heat laminating a film to a foam is being used because of the benefits it provides to the integrated panel, including increased compressive and flexural strength and sometimes improved water resistance.

Another conventional use is as a formwork/insulation panel, which is made by laminating a thick insulating board made of expanded polystyrene board with a plastic film heat-sealed to one side thereof, as disclosed in Japanese Patent No. 2,823,916, which is 25 mm or more thick.

Patent-2823916

Thin foam materials are required in areas such as boxes and decorative art, and one way to increase the compressive strength and bending strength of foam materials with a thickness of less than 15 mm is to laminate them with PET film, but because the heat used for thermal lamination reaches 135°C to 160°C, the base insulation material and film will expand and contract due to the heat, and this deformation will remain after bonding, causing the material to curve and not become flat.

The thinner the material, the more this curvature remains, resulting in a higher product defect rate; therefore, there was a need to reduce deformation and curvature caused by expansion and contraction due to heat.

This invention is intended to solve the problem of distortion and curvature caused by thermal bonding, and the insulation panel described in the claims makes it possible to reduce distortion and curvature by thermally laminating and attaching a three-layer composite film consisting of a PET film, an aluminum foil layer, and an adhesive layer.

Even if the aluminum foil layer of this multi-layer film is replaced with an aluminum vapor deposition layer, distortion and curvature can be suppressed by attaching it with thermal lamination.

The insulation panel integrated with the multi-layer film of this invention can also improve local compressive strength and bending strength, making it fully usable for applications such as packing boxes, strong work materials, exhibition panels, and backing steel plates that are subjected to strong impacts when walking on construction sites or during other work.

Distortion, deformation and curvature due to heat can be suppressed, and bonding the film by means of thermal lamination simplifies the work and makes manufacturing extremely smooth.

FIG. 1 is a perspective view of a composite film laminated heat insulation panel according to the present invention and its symbols. 1 PET film (surface) 2 Aluminum foil or aluminum vapor deposition layer (middle part of multi-layer film) 3 OPS adhesive layer (substrate surface) 4 Extruded polystyrene foam or foam substrate

Cross-sectional view of the composite film laminated insulation panel of the present invention 1 PET film (surface) 2 Aluminum foil or aluminum vapor deposition layer (middle part of the multi-layer film) 3 OPS adhesive layer (substrate surface) 4 Extruded expanded polystyrene or expanded substrate

As shown in Figures 1 and 2, the embodiment of this invention mainly comprises an extruded polystyrene foam with a multi-layer film attached to the surface by thermal lamination.

The expansion ratio of the foam that becomes the base material is not limited, but is preferably within the range of about 20 to 40. The thickness of the foam 4 affects two elements, bending strength and heat insulating performance, and is appropriately selected depending on the purpose of use, but the market demand is often a thickness in the range of 3 to 20 mm.

The composite film has a polyester terephthalate film as the first layer on the front side, in which case OPS is used as the adhesive layer, and other synthetic resin films such as nylon, polypropylene, or polyethylene can also be used. In this case, the adhesive layer on the back side will be a three-layer structure in which EVA is bonded with molten polyethylene.

An aluminum foil or aluminum vapor deposition layer is laminated between the two-layered film to form a three-layered structure.

The thickness of the polyester terephthalate (PET) film covering the surface is about 10 to 300μ, preferably in the range of 15 to 50μ, the thickness of the OPS is 20 to 50μ, and in the case of molten polyethylene, the thickness is in the range of 5 to 30μ.

When aluminum foil is laminated, the thickness of the aluminum foil is in the range of 3 to 15μ.

The aluminum vapor deposition layer may be in the range of 30 nm to 100 nm, but a thickness of 50 nm to 100 nm is preferable.

The foam and the film are bonded together by thermal lamination using a heated roll. The temperature of the heated roll is in the range of 130 to 200°C, preferably 135 to 190°C.

Claims (1)

This is a heat insulation panel characterized in that when a polyester terephthalate (PET) film and an adhesive layer of OPS (biaxially oriented polystyrene), or a PET multilayer film laminated with an EVA film using molten polyethylene, are heat-fused with a hot roller to integrate an insulating material made of extruded expanded polystyrene or extruded inflation foam of polystyrene resin or urethane resin foam having a thickness of less than 15 mm, the curvature caused by expansion and contraction of the foam due to overheating is prevented by laminating aluminum foil or aluminum vapor deposition film.

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