Method of making a blast or shock wave mitigating material

• US 10,183,423 B2
• Filed: 02/01/2015
• Issued: 01/22/2019
• Est. Priority Date: 09/09/2011
• Status: Active Grant

• Current Assignee: Purdue Research Foundation (The Trustees of Purdue University (d/b/a Purdue University))
• Original Assignee: Purdue Research Foundation (The Trustees of Purdue University (d/b/a Purdue University))
• Inventors: Nauman, Eric, Zakrajsek, Anne Dye, Zakrajsek, Andrew, Son, Steven Forrest, Breedlove, Evan Louis
• Primary Examiner(s): Lee, Edmund H
• Application Number:
  US14/611,265
• Publication Number:
  US 20150202806A1
• Time in Patent Office: 1,451 Days
• Field of Search: None
• CPC Class Codes: A43B 13/04 Plastics, rubber or vulcanised fibre
• CPC Class Codes: A43B 13/187 Resiliency achieved by the features of the material, e.g. foam, non liquid materials
• CPC Class Codes: A43B 17/003 characterised by the material made of wood A43B17/12, made of sponge, rubber or plastic materials A43B17/14
• CPC Class Codes: A63B 71/10 for the head A63B71/081 takes precedence ; in the form of caps or hats A42B1/08; helmets A42B3/00
• CPC Class Codes: B29C 43/021 characterised by the shape of the surface
• CPC Class Codes: B29L 2031/768 Protective equipment B29L2031/4821 takes precedence
• CPC Class Codes: C08K 3/04 Carbon
• CPC Class Codes: C08L 23/06 Polyethene
• CPC Class Codes: C08L 83/00 Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon only; Compositions of derivatives of such polymers
• CPC Class Codes: C08L 83/04 Polysiloxanes

Abstract

A compound for protection of an object from a blast or shock wave. The compound include a matrix material and at least a first and second sets of inclusions in the matrix material that differ in size, quantity, shape and/or composition in a direction through the impact-absorbing material, the combination of which contributes to the ability of the material to exhibit at least one property that changes as the inclusions are deformed in response to a blast or shock wave.

Claims

1. A method of making a blast or shock wave mitigating material, comprising:

providing a compound that is curable to form a polymer;

providing a mold cavity having an internal height adapted and configured to produce cured polymer suitable to be used in a helmet or as a sheet of material to be used in blast protection panel, the mold cavity configured to provide geometric features within the cured polymer;

placing the compound in the mold cavity;

permitting curing of the compound to proceed for at least about five minutes to provide a partially cured material;

exposing the partially cured material in the mold cavity to pressure less than ambient pressure for a period of time after said permitting during which curing progresses to provide a substantially polymerized material;

removing the substantially polymerized material from the mold;

filling the geometric features of the substantially polymerized material with a fluid; and

, after said filling, forming the substantially polymerized material as an interior portion of a helmet or as the blast protection panel.

2. The method of claim 1, wherein the fluid is water.

3. The method of claim 1, wherein the fluid is oil.

4. The method of claim 1, wherein the fluid is uncured silicone.