IP Library Granted Patent US 9,554,949
Granted Patent B2
US 9,554,949 · App. 14/023,017 · Granted Jan 31, 2017

Apertured formed film with a pattern of apertures and a plurality of light trap micro-pits

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Quick Facts
Patent No.
US 9,554,949
App. No.
14/023,017
Granted
Jan 31, 2017
Kind
B2
Abstract

An apertured film with a reduced gloss through the use of light trap micro-pits uniformly distributed on the lands of the film in a random pattern and a method of making the same.

Claims (8)

1. An apertured film comprising an apertured film surface area comprising a pattern of apertures and lands surrounding the apertures, the lands comprising a land area; the land area comprising a plurality of light trap micro-pits randomly positioned on the land area with uniform density across the land area and a total reflective area, each of the light trap micro-pits comprising an opening with a sidewall descending from the opening to a bottom; wherein each of the openings of the light trap micro-pits comprises an irregular perimeter with an average diameter and a depth greater than half the average diameter of the micro-pit divided by tan 37.5, wherein the apertured film surface area comprises a 75° gloss in the machine direction of the apertured film of less than 4.0.

2. The apertured film of claim 1 , wherein the light trap micro-pit average diameter is no more than about 250 μm and no less than about 25 μm.

3. The apertured film of claim 1 , wherein the total reflective area is less than the land area.

4. The apertured film of claim 1 , wherein the 75° gloss in the machine direction of the apertured film is less than 3.5.

5. The apertured film of claim 1 , wherein the light trap micro-pits have an edge-to-edge spacing of less than 155 μm.

6. The apertured film of claim 1 , wherein the pattern of apertures is selected from a 50/7 pattern, 35/7 pattern, 35/14 pattern and combinations thereof.

7. The apertured film of claim 1 , wherein the land area further comprises a series of random humps and valleys.

8. The apertured film of claim 1 , wherein the pattern of apertures comprises nested pentagons with a substantially uniform land between the apertures defining a land width of about 178 microns yielding a land area of about 40% of the total surface area.

Assignments (3)
CHANGE OF NAME Recorded Jan 14, 2021
From: TREDEGAR FILM PRODUCTS LLC
To: FITESA FILM PRODUCTS LLC
Reel/Frame 054984/0795 →
CHANGE OF NAME Recorded Apr 29, 2020
From: TREDEGAR FILM PRODUCTS CORPORATION
To: TREDEGAR FILM PRODUCTS LLC
Reel/Frame 052521/0105 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Oct 1, 2013
From: SEYLER, RICKEY J.; THOMAS, PAUL EUGENE; MASCHINO, ANDREW D.
To: TREDEGAR FILM PRODUCTS CORPORATION
Reel/Frame 031316/0650 →