PRODUCT INFO
General Information for Injection Molding
- We wish to emphasize safety in working with hot polymers and liquids that are under pressure, and recommend placing cardboard or other suitable material over the exits of the nozzle.
- CA250 becomes a liquid at 130-140°F and will remain a liquid above that temperature. We do not recommend mixing the powder and polymer as pre-melting may occur in the feed throat and screw slippage can occur.
- We recommend that the screw speed be slowed to 10-15 rpms to reduce high pressure on this liquid/solids mixture. Reducing screw back pressure to zero will also reduce screw slippage.
- CA250 can be used when cleaning the barrel and screw of burnt or carbonized material. Monitoring of back pressure at the slower screw speeds will reduce the chance of screen blockage.
- CA250, acting as a plasticizer, will reduce normal shear rate and shear stress, the motor load amperage will be significantly reduced.
- First time use of CA250 will remove carbonized material from the barrel and screw which was previously unknown to exist. Cleaning each polymer/color change or on a preventive maintenance basis, will keep build-up to a minimum.
- The plastic purge CA250 will contain contaminants such as burnt polymer and carbonized material and should not be salvaged for reuse.
- CA250 is safe for use as a purge in process equipment used for food packaging products.
- CA250 will generate a white smoke when it exits the nozzle and is classified as nontoxic.
- Estimated cost of cleaning a 2½” injection screw and nozzle of most thermoplastics will be $3-$5 (¼ - ¾ pounds of CA250).
- When screw removal or nozzle change is necessary, CA250 will reduce clean-up time as the polymer in the equipment will not adhere to the metal surfaces.
- One time use of CA250 may not totally remove all carbonized polymer. When used with a preventive maintenance program, it will reduce production downtime and contaminated polymer.
- CA250 will separate hot polymer from die surfaces, reducing the need for manual cleaning that can damage these critical flow surfaces and seal faces.
- CA250 will burn at elevated temperatures (500°F) similar to candle wax.
- A SDS is available upon request.
- CA250 contains no abrasives that can damage polymer flow surfaces.
- CA250 has no know chemical reactions with all types of metals.
- Purging of injection molding machines requires the screw back pressure to be reduce to zero for proper conveying.
- CA250 has been used as a dynamic dispersion aid in manufacturing of color concentrates and fillers that are highly loaded.
