Door seal and preparation method thereof as well as refrigeration equipment
A technology for refrigeration equipment and door seals, which is applied in the field of door seals and their preparation, can solve the problems of lack of elasticity, corrosion of side panels and door bodies, cracking, etc., and achieve good low-temperature characteristics and increased wear resistance and deformation resistance Effect
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Embodiment 1
[0054] 100 parts by weight of PVC (Qilu Petrochemical S1300), 40 parts by weight of polyester plasticizer (PPA-2500), 10 parts by weight of auxiliary plasticizer (ESO), 2 parts by weight of organotin, 15 parts by weight of light calcium, 15 parts by weight of heavy calcium parts by weight, 0.35 parts by weight of foaming agent (OBSH), and 8 parts by weight of antifungal agent. Main process: Foaming agent, plasticizer and organotin are firstly mixed and ground together according to the ratio, then the PVC resin powder is put into the high-mixer, and stirred at a low speed (400-600r / min, the same below), while stirring slowly Add plasticizer evenly, turn to high speed (800r ~ 1200r) after adding, when the temperature rises to about 100°C, turn to low speed, alternate between low and high speed, control the material temperature between 90°C and 110°C for about 15 minutes. Turn to low speed and add anti-fungal agent, finally add calcium powder, continue to stir for 3-5 minutes, ta...
Embodiment 2
[0056] 40 parts by weight of PVC resin powder (SGⅡ type), 8 parts by weight of powdered nitrile (P83), 25 parts by weight of TOTM, 5 parts by weight of ESO, 1.5 parts by weight of rare earth composite stabilizer, 18 parts by weight of calcium powder, 0.75 parts by weight of AC foaming agent , ZnSt1.25 parts by weight, antibacterial agent 0.5 parts by weight. According to conventional mixing, granulation, extrusion, welding and hanging, the required door seal can be obtained.
Embodiment 3
[0058] 35 parts by weight of PVC (SGⅢ), 15 parts by weight of EVA powder (EVA30 / 10+EVA30 / 30), 15 parts by weight of DOTP+10 parts by weight of TOTM+5 parts by weight of ESO, 2 parts by weight of Ca-Zn stabilizer, 15 parts by weight of calcium powder , 1.25 parts by weight of AC blowing agent, 0.75 parts by weight of antibacterial agent.
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