Barriers and Filters

• US 20190308120A1
• Filed: 06/23/2019
• Published: 10/10/2019
• Est. Priority Date: 03/31/2015
• Status: Active Grant

• Current Assignee: Environmental Systems LLC
• Original Assignee: Ertec Environmental Systems LLC
• Inventors: Morris, Vincent P.
• Granted Patent: US 11,724,224 B2
• Time in Patent Office: Days
• CPC Class Codes: B01D 2029/033 bar screens
• CPC Class Codes: B01D 2239/065 More than one layer present in the filtering material
• CPC Class Codes: B01D 29/03 self-supporting
• CPC Class Codes: B01D 39/1692 Other shaped material, e.g. perforated or porous sheets

Abstract

An elongate barrier comprising an elongate apertured load-bearing sheet material and an elongate apertured filter material attached to the load-bearing sheet material. The length of the filter material can be changed elastically so that the barrier material can be transported in the form of a roll which can be unrolled for installation.

Claims

1. A barrier which comprises

(1) an elongate load-bearing apertured material and

(2) an elongate filter material (i) which is attached to at least part of the load-bearing apertured material, (ii) which comprises apertures which are substantially smaller than the apertures in the apertures in the load-bearing sheet material, and (iii) whose length can be changed without making the filter ineffective.

2. A barrier according to claim 1 wherein the filter material

(1) comprises

(A) a first set of melt-extruded polymeric strands which are (i) parallel to each other and (ii) spaced apart from each other, and

(B) a second set of melt-extruded polymeric strands which are (i) parallel to each other, (ii) spaced apart from each other, and (iii) at an angle to the first strands, the angle preferably being 50-80°

;

the first and second sets of polymeric strands (i) being bonded to each other at crossover sections at which the polymeric strands are bonded together, and (ii) forming open apertures which preferably have an aperture size, measured by the procedure of ASTM D-4751, which is less than 500μ

(0.500 mm), preferably less than 450 μ

m, particularly less than 400 μ

m, for example 200-400 μ

m, particularly 200-300 μ

m,

(2) preferably has a percentage open area (measured by COE 02215-86) of at least 20%, e.g. at least 25%, preferably at least 30%, for example 20-60%, particularly about 55%, and

(3) preferably has a thickness of less than 0.060 inch, preferably 0.01-0.04 inch, particularly 0.015-0.03 inch.

4. A barrier according to claim 1 wherein the filter material

1) comprises

(A) a first set of polymeric strands which are (i) parallel to each other and (ii) spaced apart from each other, and

(B) a second set of polymeric strands which are (i) parallel to each other, (ii) spaced apart from each other, and (iii) at an angle to the first strands, the angle preferably being 70-90°

;

the first and second sets of polymeric strands (i) being melt-bonded to each other at crossover sections at which the polymeric strands are bonded together, and (ii) forming open apertures;

the filter material having a percentage open area (measured by COE 02215-86) of 8-60%, for example 8-15%, e.g. about 10%; and

the apertures preferably having an aperture size, measured by the procedure of ASTM D-4751, which is less than 600 μ

m (0.500 mm), preferably less than 550 μ

m, particularly less than 450 μ

m, for example 300-450 μ

m, particularly 300-425.

5. A barrier according to claim 1 wherein the filter materialcomprises

(A) a first set of polymeric strands, the polymeric strands in the first set being (i) parallel to each other and (ii) spaced apart from each other, and

(B) a second set of polymeric strands, the polymeric strands in the second set being (i) parallel to each other, (ii) spaced apart from each other, and (iii) at an angle, e.g. at an angle of 70-90°

, to the polymeric strands in the first set;

the polymeric strands in the first and second sets of polymeric strands (i) being woven together so that they meet each other at crossover sections at which the polymeric strands are not bonded together, and (ii) forming open apertures which preferably have an aperture size, measured by the procedure of ASTM D-4751, which is less than 600 μ

m (0.500 mm), preferably less than 550 μ

m, particularly less than 450 μ

m, for example 300-450 μ

m, particularly 300-425 μ

m,

the filter material having a percentage open area (measured by COE 02215-86) of 8-60%, for example 8-15%, e.g. about 10%; and

the apertures preferably having an aperture size, measured by the procedure of ASTM D-4751, which is less than 600 μ

m (0.500 mm), preferably less than 55 fifth 0 μ

m, particularly less than 450 μ

m, for example 300-450 μ

m, particularly 300-425 μ

m., and

the filter material preferably having a percentage open area (measured by COE 02215-86) of at least 8%, for example 8-60%, e.g. 8-15%, particularly about 10%,

the filter material preferably having a thickness of less than 0.060 inch, preferably 0.01-0.04 inch, particularly 0.015-0.03 inch, and

the filter material having a length which preferably can be changed elastically by at least 0.05%, particularly at least 0.1%, for example a length of at least 25 feet.

6. A barrier according to claim 1 which is in the form of multiple layers wrapped around a core having a diameter of 1-6 inch.

7. A barrier according to claim 6 which has a length of at least 25 feet, preferably at least 50 feet.

8. A barrier according to claim 1 which has been installed along an extended barrier line.

9. A method for installing a barrier, the method comprising

(A) providing a barrier according to claim 1 in the form of a roll;

(B) unrolling the barrier, the length of the barrier material when it is completely unrolled being for example at least 25 feet, particularly at least 50 feet, e.g. 50-300 feet;

(C) creating a barrier by installing the barrier roll, the barrier being installed as it is unrolled or after it has been unrolled.

10. A method for cleaning a barrier according to claim 1 which has been in use over a period of time and is, therefore, contaminated, the method comprising removing the barrier, cleaning the removed barrier by a process which preferably includes passing the removed barrier through a plurality of operations, for example over a plurality of rollers on or between which the barrier is cleaned at least partially by water and/or by steam, and optionally by mechanical forces that remove and/or loosen the contaminants.

11. A filter material whose length can be changed without making it ineffective as a filter material.

12. A filter material according to claim 11 which

(1) comprises

(A) a first set of melt-extruded polymeric strands which are (i) parallel to each other and (ii) spaced apart from each other, and

(B) a second set of melt-extruded polymeric strands which are (i) parallel to each other, (ii) spaced apart from each other, and (iii) at an angle to the first strands, the angle preferably being 50-80°

;

the first and second sets of polymeric strands (i) being bonded to each other at crossover sections at which the polymeric strands are bonded together, and (ii) forming open apertures which preferably have an aperture size, measured by the procedure of ASTM D-4751, which is less than 500μ

(0.500 mm), preferably less than 450 μ

m, particularly less than 400 μ

m, for example 200-400 μ

m, particularly 200-300 μ

m,

(2) preferably has a percentage open area (measured by COE 02215-86) of at least 20%, e.g. at least 25%, preferably at least 30%, for example 20-60%, particularly about 55%, and

(3) preferably has a thickness of less than 0.060 inch, preferably 0.01-0.04 inch, particularly 0.015-0.03 inch, and

(4) preferably has a length which can be changed elastically by at least 0.05%, preferably at least 0.1%, for example a length of at least 25 feet.

13. A filter material according to claim 11 whichcomprises

(A) a first set of polymeric strands which are (i) parallel to each other and (ii) spaced apart from each other, and

(B) a second set of polymeric strands which are (i) parallel to each other, (ii) spaced apart from each other, and (iii) at an angle to the first strands, the angle preferably being 70-90°

;

the first and second sets of polymeric strands (i) being melt-bonded to each other at crossover sections at which the polymeric strands are bonded together, and (ii) forming open apertures which preferably have an aperture size, measured by the procedure all of ASTM D-4751, which is less than 600 μ

m, preferably less than 550 μ

m, particularly less than 450 μ

m, for example 300-450 μ

m, particularly 300-425 μ

m;

the filter material preferably having a percentage open area (measured by COE 02215-86) of 8-60%, for example 8-15%, e.g. about 10%; and

14. A filter material according to claim 11 which comprises

(A) a first set of polymeric strands, the polymeric strands in the first set being (i) parallel to each other and (ii) spaced apart from each other, and

(B) a second set of polymeric strands, the polymeric strands in the second set being (i) parallel to each other, (ii) spaced apart from each other, and (iii) at an angle, e.g. at an angle of 70-90°

, to the polymeric strands in the first set;

the polymeric strands in the first and second sets of polymeric strands (i) being woven together so that they meet each other at crossover sections at which the polymeric strands are not bonded together, and (ii) forming open apertures which preferably have an aperture size, measured by the procedure of ASTM D-4751, which is less than 600 pm (0.500 mm), preferably less than 550 μ

m, particularly less than 450 μ

m, for example 300-450 μ

m, particularly 300-425 μ

m,

the filter material preferably having a percentage open area (measured by COE 02215-86) of 8-60%, for example 8-15%, e.g. about 10%; and

the filter material preferably having a thickness of less than 0.060 inch, preferably 0.01-0.04 inch, particularly 0.015-0.03 inch, and

the filter material having a length which preferably can be changed elastically by at least 0.05%, particularly at least 0.1%, for example a length of at least 25 feet