Filter and barrier

• US 10,335,724 B1
• Filed: 03/30/2016
• Issued: 07/02/2019
• Est. Priority Date: 03/31/2015
• Status: Active Grant

• Current Assignee: Environmental Systems LLC
• Original Assignee: Environmental Systems LLC
• Inventors: Morris, Vincent P.
• Primary Examiner(s): Greene, Jason M
• Application Number:
  US15/085,184
• Time in Patent Office: 1,189 Days
• CPC Class Codes: B01D 2029/033 bar screens
• CPC Class Codes: B01D 2239/065 More than one layer present in the filtering material apparatus incorporating such gas filtering material B01D2275/10
• 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 material comprising an elongate apertured load-bearing sheet material and an elongate apertured filter material attached to the load-bearing sheet material. The apertures in the filter material have an ASTM D-4751 size less than 500μ and the size of the apertures in the load-bearing material is at least 4 times the size of the apertures in the filter 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 material which comprises

(i) an elongate load-bearing apertured sheet material and

(ii) an elongate apertured sheet filter material which is attached to the load-bearing apertured sheet material,

the load-bearing apertured sheet material comprising

(A) a first set of melt-extruded polymeric strands which are (i) parallel to each other and (ii) spaced apart from each other with a distance between adjacent strands of 0.1 to 0.5 inch, and

(B) a second set of melt-extruded polymeric strands which are (i) parallel to each other, (ii) spaced apart from each other with a distance between adjacent strands of 0.1 to 0.5 inch, and (iii) at an angle to the first strands;

the first and second sets of polymeric strands (a) being bonded to each other at crossover sections at which the polymeric strands are bonded together, and (b) forming open apertures which have a first aperture size, measured by the procedure of ASTM D-4751, and

the filter material

(1) comprising

(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 of 50-80°

to the first strands;

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

(0.500 mm) and the first aperture size being at least 4 times the second aperture size,

(2) having a percentage open area (measured by COE 02215-86) of at least 25%, and

(3) having a length which can be changed elastically by at least 0.03%.

2. A barrier material according to claim 1 wherein (i) the second aperture size is less than 400μ

and (ii) the first aperture size is at least 8 times the second aperture size.

3. A barrier material according to claim 2 which consists essentially of (i) the load-bearing sheet material, (ii) the filter material and (iii) means securing the filter material to the load-bearing sheet material.

4. A barrier material according to claim 2 which has a length of at least 25 feet and wherein the filter material has a thickness of less than 0.06 inch.

5. A barrier material according to claim 4 wherein the length of the filter material can be changed elastically by at least 0.1%.

6. A barrier material according to claim 5 which is in the form of multiple layers wrapped around a core having a diameter of 1-6 inch.

7. An area of ground which comprises a barrier material according to claim 1 which has been installed along an extended barrier line on the ground.

8. A barrier material which comprises (i) an elongate load-bearing apertured sheet material and (ii) an elongate apertured sheet filter material which is attached to the load-bearing apertured sheet material,

the load-bearing apertured sheet material

(1) comprising

(A) a first set of melt-extruded polymeric strands which are (i) parallel to each other and (ii) spaced apart from each other with a distance between adjacent strands of 0.1 to 0.5 inch, and

(B) a second set of melt-extruded polymeric strands which are (i) parallel to each other, (ii) spaced apart from each other with a distance between adjacent strands of 0.1 to 0.5 inch, and (iii) at an angle of 60-80°

to the first strands;

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 have a first aperture size, measured by the procedure of ASTM D-4751, and

(2) having a percentage open area (measured by COE 02215-86) of at least 35%;

and the filter material

(1) comprising

(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 of 50-80°

to the first strands;

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 have a second aperture size, measured by the procedure of ASTM D-4751, the second aperture size being less than 400μ and

the first aperture size being at least 4 times the second aperture size,

(2) having a percentage open area (POA measured by COE 02215-86) of at least 30%,

(3) having a length which can be changed elastically by at least 0.1%, and

(4) has a thickness of 0.01-0.04 inch.

9. A barrier material according to claim 8 wherein (i) the second aperture size is less than 400μ

and (ii) the first aperture size is at least 8 times the second aperture size.

10. A barrier material according to claim 9 wherein the second aperture size is 200-400μ

.

11. A barrier material according to claim 8 wherein the filter material has a percentage open area of about 55%.

12. A barrier material according to claim 8 which has a length of at least 25 feet and wherein the filter material has a thickness of less than 0.06 inch.

13. A barrier material according to claim 12 wherein the length of the filter material can be changed elastically by at least 0.1%.

14. A barrier material according to claim 8 wherein the filter material has a thickness 0.015-0.03 inch and a width of at least 4 inch.

15. A barrier material according to claim 8 which consists essentially of (i) the load-bearing sheet material, (ii) the filter material and (iii) means securing the filter material to the load-bearing sheet material.

16. A barrier material according to claim 8 which is in the form of multiple layers wrapped around a core having a diameter of 1-6 inch.

17. An area of ground which comprises a barrier material according to claim 8 which has been installed along an extended barrier line on the ground.

18. An elongate filter material 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 of 50-80°

to the first strands;

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 have an aperture size, measured by the procedure of ASTM D-4751, which is less than 500μ

(0.500 mm),

(2) has a percentage open area (measured by COE 02215-86) of at least 25%,

(3) has a thickness of less than 0.060 inch, and

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

19. A filter material according to claim 18 which has an aperture size of 200-300 μ

m and whose length can be changed elastically by at least 0.1%.

20. A filter material according to claim 18 which has a thickness of 0.015-0.03 inch and a width of 6 to 36 inch.