Antioxidant, light stabilizer processing
Antioxidant, light stabilizer processing
The surface treatment of high purity, high quality titanium dioxide, if the high mixer or extruder feed section to stay too long, due to severe friction and damage part of the surface treatment layer, even if the plastic products by adding a high efficiency antioxidant , Light stabilizer, the actual anti-aging properties of products is also difficult to meet the design requirements.
Antioxidant, light stabilizer in the total addition of plastic products in the total 0.5% to 1.5%, if the mixing of a large number of mixing in the mixer wall, or thermal processing volatilization is too high, the actual product Antioxidant, light stabilizer ratio will be lower than the formula design. If the processing of antioxidants, light stabilizer and resin mixture is not uniform, products in the antioxidant, light stabilizer is also uneven distribution. In the course of the use of the mechanical properties of products by the antioxidant, light stabilizer distribution is too low or the lowest local mechanical properties of the decision, the local low mechanical properties led to the early loss of anti-aging plastic products use value.
Table is broken agricultural polyethylene film detection data, a, b on behalf of the same membrane of the two parts, a for the rupture, b for the perfect site. 6 # film as a whole intact, no rupture.
Table polyethylene film rupture site, intact parts of the test data
Number of film thickness
Mm Tensile strength
Longitudinal / transverse MPa elongation at break
Vertical / horizontal% carbonyl index
Rupture at the perfect location
1 1-a 0.109 9.6 / 10.7 32/50 10.66
1-b 0.115 11.8 / 11.2 440/200 2.44
2 2-a 0.123 9.7 / 9.9 40/55 7.66
2-b 0.125 11.4 / 11.9 160/70 3.55
3 3-a 0.128 / 8.16
3-b 0.138 11.2 / 399 / 4.84
4 4-a 0.130 11.9 / 15.1 68/500 6.02
4-b 0.138 14.7 / 12.9 470/590 2.14
5 5-a 0.130 / 6.93
5-b 0.112 11.9 / 13.8 220/430 3.29
6 No 6 0.136 21.1 / 19.9 680/750 0.48
The test data show that:
① 6 sheets of polyethylene film thickness range of 0.109-0.138 mm, 5 # membrane has cracked and cracked part of the thickness of the deviation slightly larger;
② 6 sheets of polyethylene film tensile strength range of 9.6 ~ 21.1MPa, elongation at break in the range of 32% to 750%. 6 # film tensile properties of the highest, the appearance of no rupture, followed by 4 # membrane. The appearance of a serious breakdown, the lower the tensile properties of the 3 #, 2 # film. Each film is not cracked part of the tensile properties higher than the cracked parts.
The carbonyl index of 6 sheets of polyethylene film is 0.48-10.66, the carbonyl index is the smallest 6 # membrane, only 0.48, followed by 4 # membrane, the largest is 1 # (1-a) cracked membrane, 10.66 The Each film is not cracked part of the carbon index is less than the cracked parts. The results showed that the tensile properties, thickness and carbonyl index data of the six polyethylene films were different, and the performance of the different numbers was different.
