A special pvc granule for ultra-high transparency rigid medical injection molding equipment
A transparent and hard technology, which is applied in the field of plastic granule production and processing, can solve the problems of inability to obtain PVC products for medical injection molding equipment, the influence of transparency of transparent hard PVC granules, and material discoloration, so as to improve fluidity and surface gloss , Improve transparency, super high surface gloss effect
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Embodiment 3
[0032] Each component VOC content (%) of table 2 embodiment 3PVC pellets
[0033]
Embodiment 1~ Embodiment 4 and Embodiment 3
[0034] The preparation method of embodiment 1~embodiment 4 and embodiment 3 matched group PVC pellets is as follows:
[0035] (1) According to the weight ratio shown in Table 1 and the VOC content (%) shown in Table 2, first polyvinyl chloride resin, methacrylate-butadiene-styrene copolymer (MBS) with a degree of polymerization of 700 , methacrylate processing aid, mercaptan methyl tin heat stabilizer, butyl dodecanoate lubricant, stearic acid, oxidized polyethylene wax and purple blue pigment are put into a high-speed hot mixer for high-speed stirring, kneading to 125 ℃ discharge, and then put it into a low-speed cooling mixer to cool to normal temperature to obtain a mixed powder with a temperature lower than 40 ℃ that can show a free-flowing state; the high-speed thermal mixer is equipped with three layers of stirring blades;
[0036] (2) Quantitatively put the above-mentioned mixed powder into the feeding hopper in the PVC conical twin-screw extrusion granulator, and then ...
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