Views: 33 Author: Vera Publish Time: 2017-08-14 Origin: Site
Here are some PP toughing formula.
4. Super-tough PP/POE blending modification
Formula
Resin pp (K7726) 329; PP (K8303) 120; PP (2401) 90; toughening agent POP (8150) 256; antioxidant 10101.2; antioxidant DLTP2.4; lubricant ZnSt2.4; colorant carbon black 0.5;
Processing technology
First, weight components according to the proportion of formula, put them into the high speed mixer and stir in low-speed for 1 minute, then in high-speed for 1 minute; put the material into twin screw extruder for compounding and granulating. The screw combination of the twin screw extruder shoule be with medium-strength shearing. The temperature is : the first section 180℃, the second 195 ℃, the third 210 ℃, the fourth 220 ℃, the fifth 235 ℃, diehead head 230 ℃, screw rotating speed 350r/min.
Performance
Tensile strength 17MPa, elongation at break 500%, flexural strength 18MPa, bending modulus 700MPa, cantilever beam notch impact strength (ambient temperature) 750j/m, ( -40℃) 320j/m, thermal deformation temperature (1.82MPa) 102 ℃.
5. PP/HDPE/POE Blending Modification
Formula
Copolymer pp (M1600) 30; Filler CaCO3 (400 mesh) 20; Poly pp (v30g) 15; Titanate coupling agent 0.2; HDPE (8920) 20; Dispersant liquid paraffin 0.1; Toughening agent POE15;
Processing technology
First, dry the CaCO3 in 110 ℃ for 4 hours, mix the material according to the formula in high speed mixer for 1 minute, add titanate coupling agent and dispersant mixing for 3 minutes in low speed to do the surface activation treatment. The purpose is to increase the misability between inorganic fillers and resins. Then evenly mix the PP, HDPE, POE and CaCO3 that has been surface activeation treated, with mixing temperature of 100~105℃ for 5 minutes. In the end, extrude and granulate the material with our TSE-65 twin screw extruder, with extruding temperature 210℃, screw rotating speed 140r/min.
Performance
Tensile strength 5MP, fracture strain rate 61%, notch impact strength 32kj/m2. The enhancement effect of talcum powder in PP is better than that of CaCO3, but it has higher plasticity and toughness retention rate. The toughening effect of POE is better than that of EPDM.
6. PP/HDPE/EPDM Blending Modification
Formula
Resin PP100; Toughening agent epdm15%; HDPE20; Lubricant HSt0.4;
Processing technology
Put the PP, HDPE, EPDM and lubricants according to formula into the high speed mixer, stir evenly with mixing temperature 100-105℃ for 5 minutes. Then granulate the materials with twin screw extruder. The L/D shoule be 25:1, extruding temperature: the first section 70~175℃, the second 180~190℃, the third section 200~210℃, the fourth 210~220℃, and the screw speed 60~100r/min.
Performance
Tensile strength: 5MPa; bending strength 2MPa; notched impact strength 8kj/m2. EPDM and PP have similar solubility parameters and surface tension values. It can be considered that the two are with a certain degree of compatibility. Thus, when blending, they play a good compatibility and toughening effect.
7. PP/HDPE/EVA Blending Modification
Formula
Resin pp (powder) 100; EVA (VA content 18%) 15; Filling agent Active CaCO3 (800 mesh) 30; HDPE (5000s) 10; Stabilizer BaSt0.3; Lubricant HSt0.5;
Processing technology
According to the formula, the materials will be added to the high-speed mixer in turn, stirring for 10 minutes. The material temperature reaches 90~100℃, so that the active CaCO3 powder, HDPE, EVA and PP powder mixture can be mixed evenly.
The mixture should be extruded with TSE-50 extruder, through the diehead, cooling trough, air blower, and then into the pelletizer machine cutting into plastic granules. Extruder barrel temperature is: Feeding section 80-100 ℃, compression section 170~180℃, homogenization section 180~190℃, mouth mold temperature 190 ℃; screw speed 60~120r/min.
Performance
Tensile strength, 5MPa; bending strength, 9MPa; rupture elongation 255%; notch impact strength 9.1kj/m2; thermal deformation temperature (18. 6MPa) 59℃. EVA modified PP material has high impact performance, good toughness, high gloss and low cost, and has broad application foreground in engineering.
