PVC Chip

PVC chip is soluble in organic solvent and easily to handle due to its wet appearance and nonstaining characters. Temperature is between 28 - 32 (C), the solvent ratio is: MEK : Toluene : Ctclohexanone = 7 : 2 : 1 Temperature is over 32 (C), the solvent ratio is:MEK : Toluene : Cyclohexanone = 6 : 2 : 2 orMEK : Toluene : MIBK = 5 : 2 : 3 Dilute : MEK / Toluene = 1 : 1 or MEK / MIBK = 1 : 1Stirring the mixed solvent with low speed (200 rpm) thoroughly, then PVChip are poured slowly. When PVChipare added completely, adjusting the stirring rate to 1200 rpm and continue to stir for 40 - 60 minutes. TOP 1) Hue: Enclosed the formulated solution for 1 hour mixing dropping standard solution and test solution on the whiteor transparent sheet, the distance between these two solutions must be 1.5 cm, to cut away these solutions byusing applicator, the thickness of the film should be about 0.003mm, comparing the speciman and standard. 2) Viscosity: Using the formulation for the hue, enclosed and agitated for 1 hour. Take out and check the viscosityby using BM-type viscosity meter - #2 Pin rotation at 60 rpm for 1 minute and check the temperature of the solutionUnit of viscosity: CP (centi-poise), sec. (using Zahn cup #3) 3) Blocking: The test solution printed on the white or transparent sheet at room temperature for 30 minutes. Cut to5 x 5 cm in size. Also cut the white sheet for 5 x 5.5 cm in size. Laminated these 2 pieces of test sample face toface on the flate glass plate, loaded by 120 g/cm2. Remove into the Gear Oven under room temperature at 50 (C)for 5 hours, observe the state of Blocking assessed on 1-to-5 scale. 4) Crocking resistancePrinting the test solution on the white sheet, white chips were printedon black sheet to put in the room temperature for 24 hours. Then cut to 2.5 cm x 28 cm in size, placed on the Crockmeter and rubbed 25times against a dry white cotton fabric at a pressure of 0.9 kg/cm2.Marking off on the cotton was evaluated on 1-to-5 Scale. Rating Staining ofwhite sheet MigrationResistance 5 No staining Very good 4 Trance Good 3 Weak Fairly good 2 Appreciable Moderate 1 Heavy Poor 5) Heat resistance:Test solution printed on the white or transparent sheet wereleft in an air circulating oven for 20 minutes at 178 - 182 (C)The change of shade is assessed on a 1-to-5 scale. Rating Shade oftest sample HeatResistance 5 Unchanged Very good 4 Trance changed Good 3 Slightly changed Fairly good 2 Considerably changed Moderate 1 Heavy Poor 6) Lighy fastnessThe printed sheet is carried out for a specifiedperiod in a Fade-O-Meter. Assessments weremade using the 1-to-8 Blue Scale so as toobserve the degree of fading and discoloration. Blue Scale Fade-O-Meter Blue Scale Fade-O-Meter 8 Outstanding 400 hours 7 Excellent 200 hours 6 Very good 100 hours 5 Good 50 hours 4 Fair 25 hours 3 Moderate 12 hours 2 Poor 6 hours 1 Very poor 3 hours