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Mayer Rod Coating

meter bar

Mayer Rod Coating

One of the most popular coating methods. The Mayer rod is a stainless steel rod that is wound tightly with stainless steel wire of varying diameter. The rod is used to doctor of the excess coating solution and control the coating weigh. The wet thickness after doctoring is controlled by the diameter of the wire used to wind the roll and is approximately 0.1 times the wire diameter. Rods are available in a wide variety of wire sizes to give a range of coating weights. The table below gives the wire sizes that are available and the wet thickness that can be achieved. The dry thickness is determined by the solids concentration of the coating solutions.
mayer rod
meter rod

Theoretical Coating amount depends of wire rod size (Grams Dry per Square Meter)

Rod Size

Wet
Mils

Thickness Microns

30%
Solids

40%
Solids

75%
Solids

100%
Solids

#3
#4
#5
#6
#7
#8
#9
#10
#11
#12
#13
#14
#15
#16
#17
#18
#19
#20
#22
#24
#26
#28
#30
#32
#34
#36

.3
.4
.5
.6
.7
.8
.9
1.0
1.1
1.2
1.3
1.4
1.5
1.6
1.7
1.8
1.9
2.0
2.2
2.4
2.6
2.8
3.0
3.2
3.4
3.6

7.6
10.2
12.7
15.2
17.8
20.3
22.9
25.4
27.9
30.5
33.0
35.6
38.1
40.6
43.2
45.7
48.3
50.8
55.9
61.0
66.0
71.1
76.2
81.3
86.4
91.4

2.18
2.91
3.64
4.38
5.09
5.82
6.56
7.28
8.00
8.74
9.47
10.20
10.93
11.65
12.38
13.11
13.85
14.58
16.03
17.49
18.94
20.40
21.85
23.31
24.76
26.23

2.91
3.88
4.85
5.82
6.80
7.78
8.34
9.71
10.69
11.65
12.63
13.60
14.58
15.54
16.51
17.49
18.45
19.43
21.36
23.31
25.25
27.20
29.14
31.09
33.04
34.96

5.47
6.83
9.11
10.93
12.74
14.58
16.40
18.21
20.04
21.87
23.71
25.51
27.32
29.14
30.99
32.78
34.61
36.41
40.07
43.72
47.38
51.04
54.65
58.28
61.62
65.55

7.29
9.11
12.14
14.58
16.99
19.43
21.87
24.28
26.72
29.16
31.60
34.00
36.41
38.85
41.29
43.70
46.14
48.55
53.43
58.28
63.16
68.04
72.86
77.72
82.55
87.40

MAYER ROD ADHESIVE COATING SYSTEM