Dow Global Technolgoies LLC

Rohm and Haas Company

Hyunwoo Kim

Nicolas Cardoso Mazzola

Wenyi Huang

Jill M Martin

Stéphane Costeux

Ayush A Bafna

Cristina Serrat

Harpreet Singh

Michael D Read

Yuanqiao Rao

Daniel A Beaudoin

Thomas J Parsons

Vivek Kalihari

Nilesh R Savargaonkar

Nikhil J Fernandes

Jeffrey D Wenzel

Kurt A Koppi

Scott R Kaleyta

Robert E Wrisley

Jie Feng

Devin A Foether

Lei Liu

Meaghan M Woodward

Described herein are UV reflective particles, and methods of forming UV reflective particles, comprising extruding a film having a plurality of alternating layers of polycarbonate (PC) and poly(methyl methacrylate) (PMMA), wherein each layer is less than 150 nm thick, and grinding the film into particles having a median particle size less than 200 microns.

Methods of making UV reflective particles

The present disclosure provides a die assembly for producing a microcapillary film. The die assembly includes a first die plate, a second die plate, a plurality of multi-jackbolt tensioners connecting the first die plate to the second die plate, a manifold, and a plurality of nozzles. The manifold is located between the pair of die plates and defines a plurality of film channels therebetween. The plurality of film channels converge into an elongate outlet, wherein a thermoplastic material is extrudable through the plurality of film channels and the elongate outlet to form a microcapillary film. The plurality of nozzles are located between the plurality of film channels. The plurality of nozzles are operatively connected to a source of channel fluid for emitting the channel fluid between layers of the microcapillary film, whereby a plurality of microcapillary channels are formed in the microcapillary film.

Die assembly for producing a film

Prepare nanofoam by: (a) providing a mold () with a mold cavity () defined by mold walls defining a sealable port (); (b) providing a foamable polymer mixture containing a polymer and a blowing agent at a pressure at least 690 kilopascals above the saturation pressure for the polymer and blowing agent; (c) introducing the foamable polymer mixture into the mold cavity () while maintaining a temperature and pressure at least 690 kilopascals above the saturation pressure and controlling the pressure in the mold cavity () by expanding a wall of the mold; and (d) releasing pressure around the foamable mixture by moving a mold wall () at a rate of at least 45 centimeters per second, causing the foamable polymer mixture to expand into nanofoam having a porosity of at least 60 percent, a volume of at least 100 cubic centimeters and at least two orthogonal dimensions of four centimeter or more.

Mold process for making nanofoam

Growing community of inventors

Midland, MI, United States of America

Hyunwoo Kim