1. A polymer interlayer, comprising:
a first polymer sheet comprising poly(vinyl butyral) and a plasticizer; and
a second polymer sheet adjacent to said first polymer sheet, wherein said second polymer sheet comprises poly(vinyl butyral) and a plasticizer;
wherein at least one of said first polymer sheet and said second polymer sheet is an embossed polymer sheet comprising a first embossed surface having an Rz value of at least 20 micrometers, a waviness index of less than 20,000 square micrometers, and a permanence of less than 85 percent
wherein said embossed polymer sheet comprising said first embossed surface is prepared by a method comprising the steps of:
forming a polymer layer comprising poly(vinyl butyral) and a plasticizer; wherein said polymer layer has a first surface and a second surface, wherein said first surface has a waviness index of less than 20,000 square micrometers and an Rz value of less than 20 micrometers, and
embossing said polymer layer on said first surface with a roughness pattern to produce said embossed surface, wherein said embossed surface has a waviness index of less than 20,000 square micrometers, an Rz value of at least 20 micrometers, and a permanence of less than 85 percent.
2. The interlayer of claim 1, wherein said polymer interlayer is not disposed in contact with any other polymer layer.
3. The interlayer claim 1, wherein said Rz value of said first embossed surface is at least 30 micrometers.
4. The interlayer of claim 1, wherein said Rz value of said first embossed surface is at least 35 micrometers.
5. The interlayer of claim 1, wherein said embossed polymer sheet has a second embossed surface with having a waviness index of less than 20,000 square micrometers, an Rz value of at least 20 micrometers, and a permanence of between 10 and 95 percent.
6. The interlayer of claim 1, wherein said Rz value is at least 45 micrometers.
7. The interlayer of claim 1, wherein said Rz value is at least 55 micrometers.
8. The interlayer of claim 1, wherein said permanence is between 30 and 50 percent.
9. The interlayer of claim 1, wherein said permanence is less than 50 percent.
10. The interlayer of claim 1, wherein said forming of said polymer layer comprises using a mirror surface die roll.
11. The interlayer of claim 1, wherein said forming includes extruding molten poly(vinyl butyral) through an extrusion die having a die lip temperature in the range of from 170 to 230\xb0 C. and said first surface has an Rz value of less than 10 micrometers prior to said embossing.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
I claim:
1. A post level bracket apparatus useful for vertically, horizontally, and diagonally aligning a post or pipe material, comprising:
a) at least one bracket, each bracket bent at a right angle forming a bend vertex and two bracket legs;
b) holding means for adjustably holding a plurality of spirit levels in selected positions relative to said bracket legs, each said spirit level having at least one lengthwise peripheral wall; and
c) adjustable attaching means for attaching said apparatus to a post or pipe material.
2. The apparatus according to claim 1 wherein each of said bracket legs defines at least one slot extending along its length.
3. The apparatus according to claim 1, further comprising a structural support rod, having opposite ends, permanently attached to at least two of said brackets at their said vertex in the vicinity of said opposite ends of said support.
4. The apparatus according to claim 2, wherein said holding means comprise at least one C spring clip having opposed, outward facing C portions connected by a base portion and adapted for releasably retaining one of said spirit levels.
5. The apparatus according to claim 2, wherein said holding means comprises at least one inverted C spring clip having opposed, inward facing C portions, each portion having outwardly extending release fingers, said C portions connected by a base portion, said clip being adapted for releasably retaining one of said spirit levels.
6. The apparatus of claim 2, wherein said holding means comprises a set of U-bolts secured by wing nuts, and a machined Neoprene insert.
7. The apparatus according to claim 1, wherein said attaching means is a belt and adjusting buckle.
8. The apparatus according to claim 1, wherein said attaching means is a hook and loop fastener.
9. The apparatus according to claim 3, wherein said attaching means is a strap and buckle, said strap centrally mounted to said support rod between said opposite ends.
10. The apparatus according to claim 1, wherein said brackets are made of one of thermoplastic and metallic material.
11. The apparatus according to claim 4, wherein said C spring clip is made of spring steel.
12. The apparatus according to claim 5, wherein said inverted C spring clip is made of a yieldable plastic or hard rubber material.
13. The apparatus of claim 1, wherein said attaching means comprise at least one magnetic strip located along each of said spirit levels.
14. The apparatus of claim 1, wherein said holding means comprises an attachment block located on each bracket leg and having an upper end wall, a lower end wall, an outer wall, an inner wall, and two side walls and defining an elongated slot extending through said block from one side wall to said other side wall and generally perpendicular thereto, said slot being so configured as to slidably fit over said bracket leg.
15. The apparatus of claim 14, wherein said holding means further comprises a bracket stop screw extending into said block from said upper end wall for adjustably fixing said block to said bracket leg at a desired position.
16. The apparatus of claim 14, wherein said holding means further comprises a groove located within said attachment block located along said inner wall and extending perpendicularly between said upper end wall and said lower end wall and so configured as to slidably fit over a peripheral lengthwise wall of said spirit gauge.
17. The apparatus of claim 16, wherein said groove is T-shaped, having a narrow portion along said inner wall and having a wide portion spaced from said inner wall by the depth of said narrow portion.
18. The apparatus of claim 16, wherein said groove is rectangular in shape so configured as to slidably fit over a peripheral lengthwise wall of said spirit gauge.
19. The apparatus of claim 18, wherein said attaching means is an elastic band having a hook and loop fastener.
20. A post level bracket apparatus useful for vertically, horizontally, and diagonally aligning a post or pipe material, comprising:
a) at least one bracket bent at a right angle forming a bend vertex and having at least one slot along each resulting bracket leg formed thereby;
b) holding means for holding a plurality of spirit level(s) in a selected fixed position relative to said slotted bracket leg;
c) a structural support rod, having opposite ends, permanently attached to each said bracket vertex at a point proximate said opposite ends of said support; and
d) adjustable attaching means for temporarily attaching said apparatus to a post or pipe material.