MPP™
"Micro-Perforated Plate"

  • The Low Cost Alternative to Expensive Photo-Etched Media
  • Uniform square holes in a square perforation pattern
  • Smooth surface finish with no sharp edges or burrs
  • Wide variety of holes down to .001" aperture (25 microns)

The Perfect Alternative to Expensive Photo-Etched Media


MPP™ or "Micro-Perf" is a useful part of the Dynapore® family of microporous stainless steel materials. This series of materials is produced by super-calendering and diffusion-bonding woven wire meshes. Calendaring and sintering imparts strength, a smooth surface finish, and permanent unchangeable pore size. The result is a transformation of foraminate (woven) media into sheets resembling perforate materials. However, MPP™ offers a range of hole sizes unachievable by conventional perforation, at a cost substantially lower than photo-etched media. The section photomicrograph above indicates a flow path perpendicular to the planar surface with "nozzle-like" entrace and exit.

  • Wire Mesh


Wire Mesh can achieve the required basic pore size & density "as woven," but is subject to fraying wires and aperture enlargement under pressure. It lacks strength, a smooth surface and a permanent, unchangeable pore size. The section photomicrograph indicates a non-perpendicular flow path.


 
  • Photo-Etched Media


Photo-Etched Media offers strength, uniform pore size & a smooth finish. However, it may be a very costly solution. Moreover, photo-etched media may not be available in the same sheet sizes, aperture sizes & densities, and alloys as Micro-Perforated Plate. Note the reduced hole cross-section depicted in the photomicrograph.

The table below gives the geometric characteristics of various grades of MPP™. Remember that the thinner MPP™ materials can be diffusion-bonded to other substrates such as coarser MPP™, wire mesh or perforated plates for enhanced mechanical strength. MPP is available in flat sheets in 304L and 316L stainless steels. Other materials are available on special order.

MPP Micro-Perforated Plate Specification

Part No. Holes
Per Inch
Hole
Size (in.)
Land
(in.)
Thickness
(in.)
Open
Area (%)
Weight
(lb/ft²)
406011 10 0.0750 0.0250 0.0197 56.3% 0.412
406017 16 0.0445 0.0180 0.0141 50.7% .345
406021 20 0.0410 0.0090 0.0071 67.2% .105
406025 20 0.0340 0.0160 0.0126 46.2% .344
406031 30 0.0268 0.0065 0.0051 64.8% .084
406035 30 0.0213 0.0120 0.0094 40.8% .294
406039 30 0.0183 0.0150 0.0132 30.1% .474
406041 40 0.0185 0.0065 0.0051 54.8% .113
406045 40 0.0150 0.0100 0.0079 36.0% .276
406049 40 0.0115 0.0135 0.0130 21.2% .530
406051 50 0.0145 0.0055 0.0043 52.6% .101
406055 50 0.0110 0.0090 0.0079 30.3% .284
406061 60 0.0122 0.0045 0.0035 53.3% .081
406065 60 0.0092 0.0075 0.0065 30.5% .237
406069 60 0.0057 0.0110 0.0120 11.7% .529
406081 80 0.0088 0.0037 0.0029 49.6% .069
406085 80 0.0070 0.0055 0.0046 31.4% .169
406089 80 0.0055 0.0070 0.0069 19.4% .274
406101 100 0.0055 0.0045 0.0039 30.3% .142
406121 120 0.0046 0.0037 0.0031 30.7% .116
406151 150 0.0041 0.0026 0.0020 37.4% .071
406201 200 0.0029 0.0021 0.0016 33.6% .063
406251 250 0.0024 0.0016 0.0013 36.0% .046
406325 325 0.0017 0.0014 0.0011 30.0% .044
406401 400 0.0015 0.0010 0.0009 36.0% .033
406501 500 0.0010 0.0010 0.0009 25.0% .029
Print this table

 

Availability


MPP™ is available in sheets up to 24" x 48" in AISI type 304L, 316L and 347 stainless steels in pore sizes down to 25 microns. Other alloys such as Monel, Nickel, and Ni-Chrome are available on special order.

 



Martin Kurz & Co., Inc.

8439 Triad Drive • Greensboro, NC, USA 27409
Ph: 336-217-3814 • Fax: 336-668-4452
Email: