Invention Grant
- Patent Title: Multi-layered foamed polymeric objects and related methods
-
Application No.: US13616892Application Date: 2012-09-14
-
Publication No.: US10029401B2Publication Date: 2018-07-24
- Inventor: Krishna Nadella , Gregory Branch , Vipin Kumar , Michael Waggoner
- Applicant: Krishna Nadella , Gregory Branch , Vipin Kumar , Michael Waggoner
- Applicant Address: US MI Mason US WA Seattle
- Assignee: Dart Container Corporation,The University of Washington
- Current Assignee: Dart Container Corporation,The University of Washington
- Current Assignee Address: US MI Mason US WA Seattle
- Agency: McGarry Bair PC
- Main IPC: B29C44/06
- IPC: B29C44/06 ; B32B5/32 ; B29C44/04 ; B29C44/34 ; B32B27/06 ; B29L31/00

Abstract:
The invention disclosed herein relates to relates to foamed thermoplastic material objects and articles of manufacture having an internal layered cellular structure, as well as to methods of making the same. In one embodiment, the invention is directed to a multi-layer foamed polymeric article of manufacture, comprising: a non-laminated multi-layer thermoplastic material sheet, wherein the multi-layer thermoplastic material sheet has first and second discrete outer layers sandwiching a plurality of discrete inner foamed layers, and wherein the two outer layers and plurality discrete inner foamed layers are integral with one another. The thermoplastic material may be a semi-crystalline polymer such as, for example, PET (polyethylene terephthalate), PEEK (polyetheretherketone), PEN (polyethylene naphthalate), PBT (polybutylene terephthalate), PMMA (polymethyl methacrylate), PLA (polylactide), polyhydroxy acid (PHA), thermoplastic urethane (TPU), or blends thereof. The two outer layers may be unfoamed skin layers having smooth outer surfaces, and the discrete inner foamed layers may be microcellular.
Public/Granted literature
- US20130065981A1 Multi-layered Foamed Polymeric Objects and Related Methods Public/Granted day:2013-03-14
Information query