Curved bullet proof glass made of glass, glass-ceramic or ceramic mechanically curved on the strike-face layer

Patent metadata

Field	Value
Publication number	US-9950944-B2
Application number	US-201414463784-A
Country	US
Kind code	B2
Filing date	Aug 20, 2014
Priority date	May 9, 2012
Publication date	Apr 24, 2018
Grant date	Apr 24, 2018

Abstract

A curved bullet-proof composite comprising:
a glass or glass-ceramic external strike-face layer having been subjected to an ion exchange process and which is mechanically curved; at least one glass or glass-ceramic intermediate layer; an internal plastic layer; and an adhesive material between the strike-face layer, the at least one intermediate layer and the internal plastic layer.

First claim

The invention claimed is:

1. A process for bending a bullet-proof composite comprised of one alkali aluminosilicate or soda-lime silicate glass strike-face layer which has been subjected to an ion exchange process to obtain enough flexibility to be mechanically curved, and having a thickness less or equal to 3mm, one or more glass or glass-ceramic intermediate layers, one internal plastic layer and an adhesive material between each of the above layers, comprising the steps of:
(a) individually bending by means of gravity and temperature the glass or glass-ceramic intermediate layers; and
(b) mechanically bending the glass strike-face layer and the internal plastic layer by laminating by heat and pressure the glass strike-face layer, the glass or glass-ceramic intermediate layers from step (a), the adhesive materials and the internal plastic layer;
wherein the softening point temperature of the glass-strike face layer is higher than the softening point temperature of the glass or glass-ceramic intermediate layers of the bullet-proof composite;
wherein the lamination temperature from step (b) is less than the bending temperature from step (a); and
wherein the glass strike-face layer corresponds to the convex side of the bullet-proof composite.

2. The process of claim 1 , wherein the glass or glass-ceramic intermediate layers have been subjected to an ion exchange process.

3. The process of claim 1 , wherein a step (c) is carried out after step (a), and consists of painting around the glass strike-face layer with black organic or inorganic paint.

4. The process of claim 3 , wherein the painting with black organic paint or inorganic is done over the glass or glass-ceramic intermediate layers.

5. The process of claim 1 , wherein the step (b) of heat and pressure mechanically bending is performed at a pressure ranging from 0.68 to 1.03 MPa.

6. The process of claim 1 , wherein the step (b) of heat and pressure mechanically bending step is performed at a temperature ranging from 85° C. to 135° C.

Assignees

• Agp America Sa

Inventors

• Mannheim Astete Mario Arturo Benjamin
• Suarez Cuervo Juan Pablo
• Benitez Palmeth Juvenal Tobias
• Espinosa Rojas Juan Carlos
• Montaño Forero Maria Carolina

Classifications

• Y10T156/1002

  with permanent bending or reshaping or surface deformation of self sustaining lamina · CPC title

• C03B23/0258

  Gravity bending involving applying local or additional heating, cooling or insulating means · CPC title

• Y10T428/26

  Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension · CPC title

• Y10T428/24959

  of adhesive layers · CPC title

• C03B23/0256 Primary

  Gravity bending accelerated by applying mechanical forces, e.g. inertia, weights or local forces · CPC title