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  1. phoward

    Acid Cleaner

    The longer you wait between cleaning, the longer the cleaning will take... If you can, soak the fins either by immersion or by surrounding with moist air by enclosure or constant stream of spray. Augment the moist air with a detergent or a Terpene (citrus oil - works very well when given...
  2. phoward

    Cadmium in plastic

    FYI - if you have cadmium in your plant in ANY amount for ANY reason, you have to at least read and have a written response/record of declaration to the OSHA regulation on Cadmium found in 29 CFR 1910.
  3. phoward

    Plastic Knobs Cracking

    Did this just recently start after not having the problem? Check/ask the molder for any change in the mold release agent formulation. T he EPA ban on a prominent solvent for release agents, 141b, has caused universal re-formulation this year. I have one customer who discovered...
  4. phoward

    Flash point

    I would not use d-Limonene as a heat transfer fluid above 100 F unless the entire environment it is used in is a Class 1, Division 2, NEC designed: in short, explosion proof equipment and working tools/procedures all around! I've been safety engineer for a chemical plant handling combustible...
  5. phoward

    Acetone alternative

    Have you tried nPB, n-Propyl bromide 106-94-5? It is non-flammable and dissolves better than 1,1,1 Trichlor.
  6. phoward

    Water Soluable Coating

    Try soybean oil, AKA a lecithin or an ester, or a water emulsion silicone. These would slow down the water permeation, but eventually wash out and allow water through.
  7. phoward

    Need help finding material ASAP

    Check with plastic materials suppliers from your local yellow pages or off the web. They may have it identified with their product line.
  8. phoward

    Looking for alternatives to a baghouse for removing airborne starch

    Eliminate the source and the bag house question is moot. Seek a closed system to empty the bags, let the dust settle before you open the door/hatch for the next bag. Also, in a closed container, use the solvent for the adhesive as a side wall wash down to speed up the cycle time to open the...
  9. phoward

    Polypropylene Pellet Blending

    It seems you have several components to adjust and require direct communication. Contact Dave at dbinder@imscompany.com, he may have some ideas or choices for you.
  10. phoward

    Exposed Wiring - outside the building

    Thanks everyone. This is very helpful in my going to the local building department and prepared to ask the right questions.
  11. phoward

    Exposed Wiring - outside the building

    Wow, that is very helpful. I will have to go back and see if any of the wiring imprint or labeling is readible. In this case, they are not under the eaves at all. They are totally unprotected, directly exposed to the sun, snow, etc. One comes through the wall and a 90 El for plastic piping...
  12. phoward

    Exposed Wiring - outside the building

    First inspection of daughter's house, she just moved into. There are two location where the prior owner ran typical looking romex wire from the porch light or just through the wall. Then he stapled it to siding and bottom side of gutters and up the downspout to a flood light. The wire to the...
  13. phoward

    Alternative Mold Cavity Cleaning (ASP 30)

    Are you using the Melamine, Nicholet, Conditioner and rubber sheet as a purge material? What kind of liquid cleaners have you used - halogen or hydrocarbon based? What are you coating the mold with? What is your basic resin and what is it you are cleaning out of the cavity - resin, burned...
  14. phoward

    Low Friction Plastics

    Sorry Pat, no. I was in Corpus Christi, TX in the late 70's. Regards, Phillip
  15. phoward

    Low Friction Plastics

    The ceramic, boron nitride, could be added to the resin to instill greater lubricity as well as temperature stability. It is also used as a mold release for an engineered resin at 8,000 psi and 800 F to make jet engine bearings and washers. It is not appropriate in this forum to comercially...
  16. phoward

    better performing resin for hinge bearing

    The ceramic, boron nitride, could be added to the resin to instill greater lubricity as well as temperature stability. It is also used as a mold release for an engineered resin at 8,000 psi and 800 F to make jet engine bearings and washers. It is not appropriate in this forum to comercially...
  17. phoward

    Permeation/Break Through Data for Gloves

    Did you ask Ansell if/when they will run the tests you need? If you are a high volume buyer or if Ansell is considering additional tests, you would find them very cooperative. As for 3rd party, try competitive brands of nitrile gloves as well as nitrile manufacturers. If it is urgent and...
  18. phoward

    long-term tarnish protection of brass parts

    There are some protective and lubricant liquids and sprays used in the plastics molding industry that allow the part to be paintable after use or with little cleaning. You could try the paintable silicone, paintable mineral oil, paintable ester. These would coat the surface, prevent oxidation...
  19. phoward

    Compatability n-propylbromide and Genetron 141b?

    We make silicone sprays with 141b as the solvent and are moving to nPB as the replacement. The use of each includes the fast evaporation rate. In fact, the point is the solvent is gone by the time the silicone hits the surface. From the timing alone, I see no problem. Chemically, they are...
  20. phoward

    calculating flashpoint of 5% (v/v water) isopropyl alcohol

    I think you have to consider Differences in these Physical States also, i.e for isopropyl is: Boiling Point/Range: 82°C (180°F) Solubility in Water: Miscible Vapor Density(Air=1): 2.1 AND MOST LIKELY: Evaporation Rate(N-Butyl Acetate=1): 2.83
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