-
公开(公告)号：US20240116238A1
公开(公告)日：2024-04-11
申请号：US18191369
申请日：2023-03-28
Applicant: Meta Platforms Technologies, LLC
Inventor： Andrew John Ouderkirk , Nagi Hosni Elabbasi , Sheng Ye , Arman Boromand , Jing Chen
IPC: B29C55/08
CPC classification number: B29C55/08 , B29K2995/0041 , B29K2995/0051
Abstract: A method of forming a uniaxially oriented crystalline polymer article includes heating a segment of a crystallizable polymer article to a first temperature, applying a stress to the crystallizable polymer article in an amount effective to induce a positive strain within the segment of the crystallizable polymer article, and heating the segment of the crystallizable polymer article to a second temperature greater than the first temperature while continuing to apply the stress.
-
公开(公告)号：US20230279585A1
公开(公告)日：2023-09-07
申请号：US18149596
申请日：2023-01-03
Applicant: Meta Platforms Technologies, LLC
Inventor： Sheng Ye , Jing Chen , Hao Mei , Andrew John Ouderkirk , Arman Boromand , Kristy Alana Jost , Nagi Hosni Elabbasi , Jonathan Robert Peterson , Christopher Yuan Ting Liao
CPC classification number: D01D5/0038 , C08J5/18 , G02B27/017 , C08J2327/12 , G02B2027/0178
Abstract: Mechanically and piezoelectrically anisotropic polymer fibers may be formed by spinning a polymer solution or gel that includes a high molecular weight crystallizable polymer and a liquid solvent. The solvent may be configured to interact with the polymer to facilitate chain alignment and, in some examples, create a higher crystalline content within the spun fibers. The polymer solution may also include a low molecular weight additive. The high and low molecular weight polymers may each be characterized by a bimodal molecular weight distribution where the molecular weight of the additive is less than the molecular weight of the crystallizable polymer. The polymer(s) and the additive(s) may be independently selected from vinylidene fluoride, trifluoroethylene, chlorotrifluoroethylene, hexafluoropropene, vinyl fluoride, etc. The spun fibers may be oriented, annealed, poled, and woven or laminated to form a polymer thin film having a high elastic modulus and a high electromechanical coupling factor.
-
公开(公告)号：US20250122383A1
公开(公告)日：2025-04-17
申请号：US18776684
申请日：2024-07-18
Applicant: Meta Platforms Technologies, LLC
Inventor： Lindsey Gilman , Jing Chen , Renate Eva Klementine Landig , Christopher Yuan Ting Liao , Ruiqing Ma , Andrew John Ouderkirk
Abstract: A solar reflective coating includes a reflective layer and a black layer overlying the reflective layer, where the black layer includes active particles dispersed throughout a matrix. Example active particles include phosphor microcrystals adapted to reflect incident non-visible radiation and convert incident visible radiation to non-visible radiation.
-
公开(公告)号：US20240240007A1
公开(公告)日：2024-07-18
申请号：US18454499
申请日：2023-08-23
Applicant: Meta Platforms Technologies, LLC
Inventor： Sheng Ye , Abhirup Dutta , Hao Mei , Lafe Joseph Purvis, II , Arman Boromand , Jing Chen , Andrew John Ouderkirk , Kristy Alana Jost
CPC classification number: C08L27/16 , B29C71/0081 , B29C71/02 , B29C2071/022 , B29K2027/16
Abstract: A polymer article includes an at least partially disentangled polyvinylidene fluoride (PVDF) family member composition and is characterized by an elastic modulus of at least 4 GPa and an electromechanical coupling factor (k31) of at least 0.1 at room temperature. A method of manufacturing such a polymer article may include forming an at least partially disentangled polymer composition into a polymer thin film or fiber, applying a tensile stress to the polymer article in an amount effective to induce a stretch ratio of at least approximately 5 in the thin film or fiber, and applying an electric field across a thickness dimension of the polymer article. Annealing and poling steps may separately or simultaneously accompany and/or follow the act of stretching.
-
-
-
Search Results
4
records
(took 0.015 seconds)
