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Trial Number 2

Client Number 199

Project Number 1

Trial Purpose:

To modify cleaning parameters to improve cleaning efficiency

Date Run:

03/04/2003

Experiment Procedure:

Four cleaners were selected from the previous test. Three products were diluted to 10% and the fourth was diluted to 5% using DI water in 600 ml beakers. All of the cleaners were heated to 130 F on a hot plate. Photographs were taken of clean tubing pieces. The inside of 12 preweighed PVC tubing pieces (3" long) were coated with the supplied Hucker' Soil (Creamy Peanut Butter, Salted Butter, Wheat glutton, Egg Yolk, Evaporated milk, DI water, Printer's ink with boiled linseed oil, India Ink, Saline Solution) using a squeeze bulb and then allowed to dry. The tubing was weighed and photographed again to determine the amount of soil added. Three pieces were cleaned in each solution for 10 minutes using mechanical agitation (moving pieces back and forth at an angle) at 130 F. Rinsing was performed for 15 seconds in tap water at 120 F and followed by drying with a forced air at for 30 seconds at 68 F. Once the tubing cooled to room temperature, final weights were recorded, pictures were taken and efficiencies were calculated.

Trial Results:

A majority of the contaminant was removed by each cleaning solutions. Each product did leave some soils behind. Only one product, Micro 90, had very little amounts of Hucker's soil visible in discrete spots. Others had grey films across the tubing. The table below lists the amount of soil added and removed from the PVC tubing.

Table 1. Soil Removal

Cleaner Initial wt Final wt % Removed
Micro 90 0.3200 0.0021 99.34
  0.3408 0.0005 99.85
  0.2829 0.0010 99.65
United 450 0.4864 0.0017 99.65
  0.4298 0.0035 99.19
  0.4273 0.0037 99.13
Lestoil 0.4272 0.0113 97.35
  0.3185 0.0120 96.23
  0.4729 0.0134 97.17
Sea Wash 8 0.4634 0.0136 97.07
  0.6550 0.0210 96.79
  0.5172 0.0179 96.54

Success Rating:

A follow up test, usually based on company input.

Conclusion:

The increase in concentration and cleaning time provided little benefit to Micro 90, but increased the effectiveness of United 450 All Clear.  Despite the increases, there was still soil remaining behind on the PVC tubing.  Increasing temperature will be reviewed next for Micro 90 and Untied 450 All Clear.

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