Anti-aging bacteriostatic PVC (polyvinyl chloride) aggregate and preparation method thereof

Abstract

The invention discloses an anti-aging bacteriostatic PVC granule and a preparation method thereof. The anti-aging bacteriostatic PVC granule is prepared from the following components in parts by weight: 80-95 parts of PVC cross-linked resin, 36-49 parts of an antibacterial agent, 22-34 parts of an anti-aging agent, 15-22 parts of pigment, 5-13 parts of a composite calcium-zinc stabilizer, 5-8 parts of a lubricant, 5-10 parts of silicon dioxide, 5-15 parts of a chelating agent, 15-25 parts of a plasticizer, 8-15 parts of an impact modifier and 24-44 parts of a filler. The granular material disclosed by the invention has good anti-aging strength, electron beam illumination resistance, weather resistance and antibacterial performance, and is suitable for the fields with high requirements, such as manufacturing of medical instruments, food packaging and building materials.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of high molecular compounds, and particularly relates to an anti-aging and bacteriostatic PVC granule and a preparation method thereof. BACKGROUND

[0002] With the development and progress of society and the increasing improvement of material life, people have higher and higher requirements for living and working environment, especially sanitary environment. Because plastics have the advantages of light weight, non-corrosion, good insulation and the like, plastics are used in many links of household appliance production. However, in daily life, a considerable part of harmful bacteria exists and breeds on the surface of plastic products, such as telephones, washing machines, computers, refrigerators, electric switches and the like, and causes various diseases through contact; therefore, in life, people inevitably come into contact with various bacteria, molds and other microorganisms, which become sources of bacterial pollution and disease transmission. However, with the continuous enhancement of people's awareness of health and environmental protection, the demand for "bacteriostasis and sterilization" is put forward for plastic parts frequently contacted in daily life, which requires various plastic products used in life to have the effects of anti-bacteria and anti-mold. At present, in the manufacturing process of PVC granules, the prepared granules have poor anti-aging performance and low bacteriostasis rate. SUMMARY

[0003] The present application provides an anti-aging and bacteriostatic PVC granule and a preparation method thereof to solve the problems in the prior art.

[0004] Technical scheme: An anti-aging and bacteriostatic PVC granule is prepared from the following components in parts by weight: PVC crosslinked resin 80-95 parts, antibacterial agent 36-49 parts, anti-aging agent 22-34 parts, pigment 15-22 parts, composite calcium-zinc stabilizer 5-13 parts, lubricant 5-8 parts, silicon dioxide 5-10 parts, chelating agent 5-15 parts, plasticizer 15-25 parts, impact resistance modifier 8-15 parts and filling agent 24-44 parts.

[0005] As optimization: the anti-aging and bacteriostatic PVC granule is prepared from the following components in parts by weight: PVC crosslinked resin 88 parts, antibacterial agent 42 parts, anti-aging agent 29 parts, pigment 18 parts, composite calcium-zinc stabilizer 8 parts, lubricant 6 parts, silicon dioxide 7 parts, chelating agent 12 parts, plasticizer 19 parts, impact resistance modifier 11 parts and filling agent 35 parts.

[0006] A preparation method of an anti-aging and bacteriostatic PVC granule, specifically comprising the following steps:

[0007] Step one, vibrating and screening the PVC crosslinked resin and weighing it;

[0008] Step two, first put PVC crosslinking resin, antibacterial agent, anti-aging agent and pigment into the high-speed mixer, then add composite calcium-zinc stabilizer and stir at high speed, the stirring speed is 1200-1400 revolutions per minute;

[0009] Step three, after the temperature rises to 70-80 DEG C, add lubricant, silicon dioxide and chelating agent;

[0010] Step four, stir the above mixture at a uniform speed to 90-95 DEG C, add plasticizer, impact modifier and filler, and after the material is completely absorbed and uniformly mixed, discharge the material to a cooling mixer for cooling;

[0011] Step five, after the temperature drops to 60-65 DEG C, the mixture is sent to the feeding barrel through the flat feeding device, and the mixture is fed into the double screw extruder through the forced feeder;

[0012] Step six, after further plasticizing and uniformly mixing through the friction and shearing of the double screw, the material is fed into the single screw extruder, and the impurities are filtered out through the filtering device, and the granulation is formed by the granulation die to produce the PVC granules.

[0013] Beneficial effects: the granules have good anti-aging strength, electron beam light resistance, weather resistance and bacteriostasis performance, and are suitable for manufacturing medical devices, food packaging and building materials and other high requirement fields. DETAILED DESCRIPTION

[0014] The technical solutions in the embodiments of the present application will be described below clearly and completely, so that those skilled in the art can better understand the advantages and features of the present application, and the protection scope of the present application is more clearly defined. The described embodiments of the present application are only a part of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the present application. Specific embodiment 1

[0016] An anti-aging and bacteriostatic PVC granule is made of the following components by weight: 80 parts of PVC crosslinking resin, 36 parts of antibacterial agent, 22 parts of anti-aging agent, 15 parts of pigment, 5 parts of composite calcium-zinc stabilizer, 5 parts of lubricant, 5-10 parts of silicon dioxide, 5 parts of chelating agent, 15 parts of plasticizer, 8 parts of impact modifier and 24 parts of filler.

[0017] A preparation method of an anti-aging and bacteriostatic PVC granule, specifically comprising the following steps:

[0018] Step one, sieve and weigh the PVC crosslinking resin;

[0019] Step two, first put PVC crosslinking resin, antibacterial agent, anti-aging agent and pigment into the high-speed mixer, then add composite calcium-zinc stabilizer and stir at high speed, the stirring speed is 1200 rpm;

[0020] Step three, when the temperature rises to 70℃, add lubricant, silica and chelating agent;

[0021] Step four, stir the above mixture at a uniform speed to 90℃, then add plasticizer, impact modifier and filler, and after the material is completely absorbed and uniformly mixed, discharge the material to a cooling mixer for cooling;

[0022] Step five, after the temperature is lowered to 60℃, send the mixed material to a feeding barrel through a flat conveying device, and then feed the mixed material to a double-screw extruder through a forced feeder;

[0023] Step six, after further plasticizing and uniformly mixing through the friction and shearing of the double screw, feed the material to a single-screw extruder, filter out impurities through a filtering device, and then cut the material into particles through a pelletizing die to produce PVC particles. Specific embodiment 2

[0025] An anti-aging and antibacterial PVC particle is made from the following components by weight: 95 parts of PVC crosslinking resin, 49 parts of antibacterial agent, 34 parts of anti-aging agent, 22 parts of pigment, 13 parts of composite calcium-zinc stabilizer, 8 parts of lubricant, 10 parts of silica, 15 parts of chelating agent, 25 parts of plasticizer, 15 parts of impact modifier, and 44 parts of filler.

[0026] A preparation method of an anti-aging and antibacterial PVC particle, specifically comprising the following steps:

[0027] Step one, sieve and weigh the PVC crosslinking resin;

[0028] Step two, first put PVC crosslinking resin, antibacterial agent, anti-aging agent and pigment into the high-speed mixer, then add composite calcium-zinc stabilizer and stir at high speed, the stirring speed is 1400 rpm;

[0029] Step three, when the temperature rises to 80℃, add lubricant, silica and chelating agent;

[0030] Step four, stir the above mixture at a uniform speed to 95℃, then add plasticizer, impact modifier and filler, and after the material is completely absorbed and uniformly mixed, discharge the material to a cooling mixer for cooling;

[0031] Step five, after the temperature is lowered to 65℃, send the mixed material to a feeding barrel through a flat conveying device, and then feed the mixed material to a double-screw extruder through a forced feeder;

[0032] Step six, through the friction shear of double screw, further plasticizing, mixing uniformly, feeding to single screw extruder, filtering out impurities through filtering device, to pelletizing die to pelletizing molding, so as to produce PVC granules. Embodiment 3

[0034] The anti-aging and antibacterial PVC granules are made of the following components by weight: 88 parts of PVC crosslinked resin, 42 parts of antibacterial agent, 29 parts of anti-aging agent, 18 parts of pigment, 8 parts of composite calcium-zinc stabilizer, 6 parts of lubricant, 7 parts of silicon dioxide, 12 parts of chelating agent, 19 parts of plasticizer, 11 parts of impact modifier and 35 parts of filler.

[0035] The application discloses a preparation method of anti-aging and antibacterial PVC granules.

[0036] Step one, vibrating and weighing the PVC crosslinked resin;

[0037] Step two, first, putting the PVC crosslinked resin, antibacterial agent, anti-aging agent and pigment into a high-speed mixer, then adding the composite calcium-zinc stabilizer and stirring at a high speed, the stirring speed being 1300 revolutions per minute;

[0038] Step three, after the temperature rises to 70-80 DEG C, adding the lubricant, silicon dioxide and chelating agent;

[0039] Step four, uniformly stirring the above mixture to 93 DEG C, then adding the plasticizer, impact modifier and filler, and after the material is completely absorbed and uniformly mixed, discharging the material to a cooling mixer for cooling;

[0040] Step five, after the temperature drops to 62 DEG C, feeding the mixed material to a feeding barrel through a flat feeding device, and feeding the mixed material to a double-screw extruding granulator through a forced feeder;

[0041] Step six, through the friction shear of double screw, further plasticizing, mixing uniformly, feeding to single screw extruder, filtering out impurities through filtering device, to pelletizing die to pelletizing molding, so as to produce PVC granules.

[0042] The granules have good anti-aging strength, electron beam light resistance, weather resistance and antibacterial performance, and are suitable for manufacturing medical devices, food packaging and building materials and other high-demand fields.

Claims

1. Anti-aging and bacteriostatic PVC granules, characterized by the fact that they comprise: The anti-aging bacteriostatic PVC granules are made of the following components by weight: 80-95 parts of PVC crosslinked resin, 36-49 parts of antibacterial agent, 22-34 parts of anti-aging agent, 15-22 parts of pigment, 5-13 parts of composite calcium-zinc stabilizer, 5-8 parts of lubricant, 5-10 parts of silicon dioxide, 5-15 parts of chelating agent, 15-25 parts of plasticizer, 8-15 parts of impact modifier and 24-44 parts of filler.

2. The anti-aging and antibacterial PVC granules according to claim 1, characterized in that: The anti-aging bacteriostatic PVC granules are made of the following components by weight: 88 parts of PVC crosslinked resin, 42 parts of antibacterial agent, 29 parts of anti-aging agent, 18 parts of pigment, 8 parts of composite calcium-zinc stabilizer, 6 parts of lubricant, 7 parts of silicon dioxide, 12 parts of chelating agent, 19 parts of plasticizer, 11 parts of impact modifier and 35 parts of filler.

3. A process for the preparation of anti-aging and antimicrobial PVC granules as claimed in claim 1, wherein: Specifically, the following steps are included: Step one, the PVC crosslinked resin is sieved and weighed; Step two, the PVC crosslinked resin, antibacterial agent, anti-aging agent and pigment are first put into a high-speed mixer, then the composite calcium-zinc stabilizer is added and stirred at a high speed, and the stirring speed is 1200-1400 revolutions per minute; Step three, after the temperature rises to 70-80℃, the lubricant, silicon dioxide and chelating agent are added; Step four, the mixture is stirred at a uniform speed to 90-95℃, then the plasticizer, impact modifier and filler are added, the material is completely absorbed, and after mixing uniformly, the material is discharged to a cooling mixer for cooling; Step five, after the temperature is reduced to 60-65℃, the mixture is sent to a feeding barrel through a flat feeding device, and then the mixture is put into a double-screw extruder through a forced feeding machine; Step six, after the mixture is further plasticized and mixed uniformly through the friction and shearing of the double screw, the mixture is fed into a single-screw extruder, and then the impurities are filtered out through a filtering device, and finally the mixture is cut into granules through a cutting die to produce the PVC granules.