 Laminating film for metal, laminated metal sheet and metal container |
| OF THE INVENTION It has been found that a thermoplastic resin film cannot afford a pinhole having ... |
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| Laminate including optically functioning film |
| It is an object of the present invention is to provide an improved laminate including an optically ... |
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| Sound insulating membrane |
| The present invention provides a sound insulating membrane having a thickness less than about 0.150"... |
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| Laminated glass and automobile window |
| In the light of the above problems, it is an object of the present invention to provide a laminated ... |
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| UV shield |
| OF THE INVENTION The composite film 10 is made up of various layers or plies. The part of the film ... |
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| Laminated glass with functional ultra-fine particles and method of producing same |
| What is claimed is: 1. A laminated glass comprising: first and second transparent glass plates; an ... |
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| Infrared (IR) absorbing polyvinyl butyral composition, sheet thereof and laminate containing the same |
| This invention is directed to a polyvinyl butyral composition comprising polyvinyl butyral resin ... |
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| Magnetic container cover |
| In accordance with the present invention, a flexible cover is provided for a container that is not ... |
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| Ring and closure for cans |
| The easily opened containers representing the state of the art today as outlined above exhibit, ... |
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| Reclosable container |
| OF THE PREFERRED EMBODIMENT A conventional packaging carton for products such as cereal and the ... |
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Lamination of semi-rigid material between glass
| Details |
Inventors: Gajewski, Kenneth J.; Meyer, John H.;
Assignee: Ford Motor Company (Dearborn, MI)
Primary Examiner: Cannon; James C.
Assistant Examiner:
Attorney, Agent or Firm: May; Roger L., Ellerbrock; Charles
A method is disclosed for producing superior optically clear laminates having a sheet of semi-rigid material encapsulated in a thermoplastic interlayer between layers of rigid material such as glass. Pre-cooled laminate elements are assembled at reduced temperature, allowing positioning of the sheet of semi-rigid material in the interlayer of the assembly with minimal wrinkling, formation of air bubbles or entrapment of moisture. Thereafter, the laminate assembly is maintained under vacuum for an extended period of time, substantially eliminating wrinkling, air bubbles and moisture from between the laminate elements as well as pre-forming the semi-rigid sheet. Bonding heat and pressure is then applied, first heating the assembly to "tack" the laminate elements together, and next applying heat and pressure for bonding the laminate elements. Superior optically clear laminates which result from the method are disclosed wherein a semi-rigid sheet of material is encapsulated in thermoplastic laminating material within an interlayer between sheets of rigid material such as glass. |
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DETAILED DESCRIPTION This need is satisfied by the present invention in which a sheet of semi-rigid material is encapsulated as an interlayer of a transparent laminate.
The method of the present invention eliminates air, moisture, wrinkles and creases from the laminate layers, and results in a strong, optically clear laminate structure.
The method calls for the assembly of pre-cooled laminate elements at reduced temperatures to mask and eliminate wrinkling, creasing and formation of air bubbles or moisture between the laminae.
Pre-cooled below ambient temperatures to a desired equilibrium temperature, the laminate elements are then assembled at such reduced temperatures.
Of particular interest is the positioning of a sheet of semi-rigid material as an interlayer of the laminate assembly.
In accordance with this method, the semi-rigid material is ultimately encapsulated in thermoplastic laminating material.
Once assembled, the cooled laminate assembly is degassed by evacuation methods known in the art, such as vacuum bags or peripheral vacuum chambers connected to vacuum pumps.
The cooled laminate assembly is maintained under vacuum for a period of time depending on its shape, size and configuration.
The laminate assembly, maintained under vacuum, is then bonded into a laminate by the application of heat and pressure.
It is preferred to first heat the laminate assembly for a period of time which still under vacuum, for example by placing it in a heated chamber, which permits the thermoplastic laminating material to melt and become sufficiently tacky to at least partially hold adjacent laminated layers together.
Heat and pressure are next applied for a period of time, for example by placing the laminate assembly in an autoclave, preferably removing the laminate assembly from under vacuum, although it may still be maintained under vacuum.
Other methods known in the art may be used to apply heat and pressure for this first step.
The pre-cooling of the laminate elements and assembly of those elements at lowered temperatures stiffens the laminate elements, preventing wrinkling and creasing during handling
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Manufacturing Materials 
