US 9,790,732 B2Granted

Methods of transferring pillars from pillar delivery films

Assignee3M Innovative Properties Company

InventorsMichael Benton Free, Martin B. Wolk, Terry O. Collier

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Abstract

Pillar delivery films for vacuum insulated glass units are disclosed. The delivery films include a support film or pocket tape, a sacrificial material on the support film, and a plurality of pillars. The pillars are at least partially embedded in the sacrificial material or formed within sacrificial material molds, and the sacrificial material is capable of being removed while leaving the pillars substantially intact. Methods of transferring pillars to a substrate using the pillar delivery films are disclosed. In order to make an insulated glass unit, the delivery films are laminated to a receptor such as a glass pane, and the support film and sacrificial material are removed to leave the pillars remaining on the glass.

Claims8

Dependent claims

A method for transferring pillars from a delivery film to a receptor surface, comprising:

providing a delivery film having a support film, a sacrificial material layer on the support film, and a plurality of pillars, wherein each pillar is at least partially embedded within the sacrificial material layer, each pillar includes a draft angle α between a face and a sloping sidewall and the draft angle is between about 95° to about 130° degrees;
laminating the delivery film to a receptor surface with the pillars facing the receptor surface;
removing the support film while leaving the pillars on the receptor surface and at least a portion of the sacrificial material on the pillars;
wherein the sacrificial material layer is discontinuous and in discrete regions around the pillars and removing the sacrificial material while leaving the pillars remaining and substantially intact on the receptor surface.

1 more element

Dependencies are inferred from the claim text.

Facts

Application: 15/294,085Filed 14 Oct 2016 · division
Priority: 13 Sep 2013
Published: US 2017/0028693 A12 Feb 2017
Granted: 17 Oct 2017
Term ends: Not estimatedThe source records don’t support an estimate.

Classification23 codes

E06B 3/67304
Assembling the units: preparing rigid spacer members before assembly
B29C 43/00
Compression moulding, i.e. applying external pressure to flow the moulding material
B32B 17/00
Layered products essentially comprising sheet glass, or glass, slag, or like fibres
B32B 37/025
Characterised by a sequence of laminating steps, e.g. by adding new layers at consecutive laminating stations: transfer laminating

Family

Application14/025,931Parent of this division · filed 13 Sep 2013
US 2017/0028693 A1Pre-grant publication · published 2 Feb 2017
US 9,587,425 B2Parent of this division
US 2015/0079363 A1Published application
US 9,790,732 B2This patent

From the US filing history. Foreign family members aren’t listed.