PEXIDAN® L/T-UV

Extruder - The grafted base resins A-1001 or A-1022 must be mixed with type CAT-003 or CAT-117 catalyst masterbatch in the proportion 95:5 by weight. Introduction of the component mixture directly in the hopper of the extruder using a gravimetric or loss-in-weight feeder is strongly recommended to obtain accurate mixtures. In order to prevent scorching the grafted compound and the catalyst masterbatch must be stored separately and mixed just prior to consumption.

PEXIDAN® L/T, L/T-UV and L/T Eclipse can be processed with single screw extruders having proper temperature control and a good mixing PE screw (2.5:1 ratio at least). These temperatures may depend on the equipment being used. All tooling should be designed to prevent stagnation of the material anywhere in the system. In case of prolonged shutdown, purge the extruder with HDPE.

Extruder Temperature Recommendations - The following temperature profile is suggested:

Color Masterbatch - Available catalyst masterbatches for use in this system include:

• PEX 5006 listed - CAT-003 Natural, CAT-003 Red, CAT-003 White, CAT-003 Blue, CAT-117 Blue
• PEX 5306 listed - CAT-003CX Black, CAT-208UV Red, CAT-188UV White, CAT-142UV Blue - In combination with CX Black - CAT-003CX Red, CAT-003CX White, CAT-003CX Blue

Curing - Curing can be done by immersion in hot water at 90°-95°C, or by exposure to low pressure steam. In all cases curing time depends on pipe wall thickness, temperature, relative humidity and any packaging used. It is suggested that the catalyst and color masterbatches be dried for 4-6 hours at 60°C (150°F) in a desiccant dryer prior to usage 

PEXIDAN® A-1001, A-1022, and the CAT-003 and CAT-117 masterbatches are all available in 1400-lb (635-kg) gaylords or 300-lb (136kg) fiber drums.

Due to the moisture sensitivity of PEXIDAN® L/T materials, SACO AEI Polymers suggests that the following points should be considered when storing the materials:

• Maintain at ambient temperature generally not exceeding 30°C 
• Avoid direct exposure to sunlight and weathering 
• Once the package has been opened it is suggested that the entire contents be used.