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1) Paste
Belt pasting machines operate at the best with crunchy paste because it has excellent cohesion to itself and it does not penetrate the belt. This assures longer belt life. The texture and crunch of the paste are increased by:

  • increasing the acid addition
  • increasing the specific gravity
  • decreasing the speed of the mixer

When the paste coming from the mixer is too hot - over 38°C (100° F) - the moisture in the paste will evaporate and change the consistency of the paste.

This can affect the operation of the machine as well as the performance and life of the belt.

To facilitate good machine operation, it is also recommended the paste to be about 18 to 22 reading on a globe penetrometer. If paste sticks to the belt, tighten the squeeze roller to remove more moisture from the belt. If paste sticking or pulling persists, the paste is too wet or the belt is too old and saturated with hard oxide and must be replaced.

2) Squeeze Roll
The squeeze roll is used to squeeze water out of the belt. It also presses the belt against the drive roll to avoid belt slippage and to aid in belt guiding. It is ideal to have sufficient moisture in the paste to provide a flow of water out of the belt.

If the squeeze roll is adjusted too tight because of stiff paste, the belt may stretch excessively. Also stiff paste will not stick well to the grids. Again, use wet paste and a cut-off wire when necessary.

3) Belt Cleaning
For good plates and long belt life, the belt must be cleaned and flushed until clean water comes out of it at the squeeze roller. Also, inject water to the underside of the belt next to the rollers. This water will be forced through the belt by the squeeze roll and flush out the paste and oxide. If residual paste in the paste is allowed to harden, it will damage the water absorbancy of the belt and it will also crack the belt fibres and plies.

Therefore, keep the belt wet all times when the machine is not in use.

4) Belt life-time
Under good operating conditions an I.T.B. belt can easily paste over 1,000,000 panels.
Once a belt is satured with paste and the surface is too smooth and too hard, little can be done except install a new belt.

When the top surface of a belt has worn smooth, the oxide will tend to stick even when the moisture content in the belt is correct. In this case belt life can be extended considerably by placing a steel cut-off wire diagonally across the belt surface to separate the plates.

When the pasting belt is new, use of the plate cut-off wire (piano wire placed diagonally across the belt following the hopper to release plates from the belt) is not recommended.
If paste begin to pull from the panels, the wire can be added. Wrapping the ''paste finishing rolls'' (located at the exit end of the paster) with a cheese cloth or tobacco cloth with half absorb moisture from the pasted panels and apply an added textured surface to the upper and lower pasted panel surfaces.
This extra added surface texture has been found to add the plate's initial cranking performance.

5) Check list
When the belt pulls paste, look for the following:

A) belt or paste is too wet
B) belt scraper is not cleaning the belt
C) squeeze roller is not tight enough to remove enough water from belt
D) belt is saturated with paste and has lost the property to absorb water.

6) Belt Storage
Belt is very stable and will not shrink nor change its dimensions. It is not affected by moisture nor temperature. No special storage conditions are requested.


1.0 Description

1.1 Endless pasting belts used for automatic pasting of battery grids on pasting machine (Hadi, Sovema, Wirtz, Mac, Winkel or any type of home made pasting machine).

The belt is seamless and there is no splice (joint) thanks to the new patented I.T.B. belt construction.

Textile structure:
Woven fabric at the external pasting surface and non-woven synthetic mat at the internal surface.

High quality absorbent cotton (external surface) and synthetic fibres (internal surface).

2.0 Characteristics

2.1 Specific tensile strength 220 daN/cm lengthwise and 155 daN/cm crosswise

Belt tensile strength (100" x 13"), lengthwise: 7000 daN

Average elongation at break: 12 %

Dimensional stability to combined temperature and
moisture (storage condition - ITB test): no size variation

3.0 Dimensions

3.1 Standard thickness 8,5 mm (0,33" for automotive pasters) and
9,5 mm (0,37" for industrial pasters)

3.2 Standard nominal lengths:
2540 mm - 100"
2565 mm - 101"
3784 mm - 149"
3899 mm - 153,5"

3.3 Standard nominal widths:
330 mm - 13"
355 mm - 14"
406 mm - 16"
508 mm - 20"
619 mm - 24"
660 mm - 26"
685 mm - 27"
762 mm - 30"

Other sizes available on request

4.0 Tolerances on actual dimensions

4.1 Thickness variation on
same belt: ± 0,10 mm (+ 0,004")

4.2 Thickness variation from
belt to belt: ± 0,25 mm (± 0,01") (automotive plates)
-0+0,50 mm (-0 + 0,02") (industrial plates)

4.3 Length: ± 0,5 %

4.4 Width: ± 2 mm (± 0,08")

Note: The above data are given for information only and are the average results of our final inspection. Slight differences are possible on individual belts due to raw materials natural variations.


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