Multilayer panel member

Patent metadata

Field	Value
Publication number	US-12036766-B2
Application number	US-202017597512-A
Country	US
Kind code	B2
Filing date	Sep 1, 2020
Priority date	Sep 6, 2019
Publication date	Jul 16, 2024
Grant date	Jul 16, 2024

Abstract

A multilayer foam panel member including: (a) at least one top sheet substrate; (b) at least one bottom sheet substrate; and (c) a middle substrate of foam material disposed inbetween, and integral with, the top and bottom sheet substrates; wherein the foam material is produced by dispensing a reactive foam-forming fluid mixture onto a moving or stationary bottom sheet substrate of a foam manufacturing line; and wherein the foam manufacturing line includes a flexible film fluid dispensing device for dispensing the reactive foam-forming fluid mixture onto the moving or stationary bottom sheet substrate to form a multilayer foam panel member; wherein the middle substrate of foam material of the panel member has improved thermal and mechanical properties; and a process for manufacturing the above multilayer foam panel member.

First claim

What is claimed is:

1. A process for manufacturing a multilayer foam panel member comprising the steps of:
(A) providing at least a top sheet substrate;
(B) providing at least a bottom sheet substrate
(C) providing a flexible film fluid-dispensing device for dispensing a foam-forming reactive fluid mixture therefrom and that includes a flexible film liner and a rigid frame, the flexible film liner including a plurality of fluid inlet apertures, a plurality of fluid outlet apertures, and a plurality of flexible fluid flow path ducts, the rigid frame including arm members that extend parallel to each other, and the rigid frame being attached to edges of the flexible film liner and holding the flexible film liner in place to receive the foam-forming reactive fluid mixture;
(D) dispensing the foam-forming reactive fluid mixture from the flexible film fluid-dispensing device onto a surface of the bottom sheet substrate, the foam-forming reactive fluid mixture entering the plurality of fluid inlet apertures, passing through the plurality of flexible fluid flow path ducts, and exiting the plurality of fluid outlet apertures onto the surface of the bottom sheet substrate distributing the foam-forming reactive fluid mixture exiting the flexible film fluid-dispensing device;
(E) allowing the foam-forming reactive fluid mixture to react on the surface of the bottom sheet substrate, for a time sufficient to form a middle foam material substrate disposed inbetween, and integral with, the top sheet substrate and the bottom sheet substrate to form a multilayer panel structure; and
(F) curing the panel structure to form a cured panel member.

2. The process of claim 1 , wherein the process is a continuous process; wherein the bottom sheet substrate is moving in a horizontal plane direction; and wherein the process includes further the step of:
(G) cutting the panel member of step (F) into a predetermined discrete panel section to form a multilayer panel member.

3. The process of claim 2 , wherein the process comprises a double band lamination production process.

4. The process of claim 1 , wherein the process is a discontinuous process; wherein the bottom sheet substrate is stationary or moving; the bottom sheet substrate is disposed in a mold; and wherein the process further includes the step of:
(G) demolding the cured panel member of step (F) from the mold to form a multilayer foam panel member.

5. The process of claim 4 , wherein the bottom sheet substrate in step (D) is disposed in a mold and the process comprises a molding production process.

6. The process of claim 1 , wherein the edges of the flexible film liner slide into slits in the arm members of the rigid frame.

Assignees

• Dow Global Technologies Llc

Inventors

• Guj Luca
• Wocke Colmar
• Coroneo Mirella
• Parenti Vanni

Classifications

• B32B2607/00

  Walls, panels · CPC title

• B32B2307/304

  Insulating · CPC title

• B32B2266/0278

  Polyurethane · CPC title

• B32B2250/40

  Symmetrical or sandwich layers, e.g. ABA, ABCBA, ABCCBA · CPC title

• B32B2250/03

  3 layers · CPC title