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A kind of migration-resistant soft PVC preparation method
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A migration-resistant and soft technology, which is applied in the field of migration-resistant soft PVC preparation, can solve the problems of high production cost and unsustainable development in the production process, and achieve the effects of inhibiting migration, good mechanical properties, and good migration resistance
Inactive Publication Date: 2016-02-03
QINGDAO UNIV OF SCI & TECH
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Problems solved by technology
However, this type of polyester plasticizer is a plasticizer product produced from petroleum resources, and the production cost is high, and the production process does not meet the requirements of sustainable development.
Method used
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Embodiment 1
[0015] Prepare the PVC compound according to the following ratio,
[0020] Implementation process: fully mix each material in an internal mixer, the mixing temperature is 120°C, and the mixing time is 15 minutes, then put the mixed material into the extruder, after extrusion, granulate to obtain a migration-resistant soft PVC. The extruder three-stage temperature and die temperature are 170°C, 175°C, 180°C, and 180°C, respectively.
[0021] The product properties of the obtained soft PVC: the tensile strength is 27.1 MPa, the elongation at break is 254%, the mobility in ethanol is 0, and the mobility in cyclohexane is 2.02%.
Embodiment 2
[0023] Prepare the PVC compound according to the following ratio,
[0028] Implementation process: fully mix each material in an internal mixer, the mixing temperature is 120°C, and the mixing time is 15 minutes, then put the mixed material into the extruder, after extrusion, granulate to obtain a migration-resistant soft PVC. Among them, the extruder three-stage temperature and die temperature were 172°C, 177°C, 183°C, and 183°C, respectively.
[0029] The product properties of the obtained soft PVC: the tensile strength is 23.3 MPa, the elongation at break is 284%, the mobility in ethanol is 0.25%, and the mobility in cyclohexane is 3.93%.
Embodiment 3
[0031] Prepare the PVC compound according to the following ratio,
[0036] Implementation process: fully mix each material in an internal mixer, the mixing temperature is 120°C, and the mixing time is 15 minutes, then put the mixed material into the extruder, after extrusion, granulate to obtain a migration-resistant soft PVC. Among them, the extruder three-stage temperature and die temperature were 172°C, 177°C, 180°C, and 180°C, respectively.
[0037] The product properties of the obtained soft PVC: the tensile strength is 20.3 MPa, the elongation at break is 337%, the mobility in ethanol is 0.57%, and the mobility in cyclohexane is 6.36%.
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Abstract
The invention relates to a preparation method of migration-resistant soft PVC (polyvinyl chloride). The preparation method of the migration-resistant soft PVC is characterized by preparing the migration-resistant soft PVC by utilizing an extruder. The migration-resistant soft PVC comprises the following components in parts by weight: 100 parts of PVC, 40-80 parts of plasticizer, 3-6 parts of thermal stabilizer and 1-3 parts of stearic acid. The preparation method of the migration-resistant soft PVC comprises the following steps of: fully mixing materials for 5-15 minutes in a mixing machine at a mixing temperature of 90-120 DEG C, then putting the mixed material into the extruder, after extrusion, pelleting to obtain the migration-resistant soft PVC, wherein temperatures of three sections of the extruder and a temperature of a nose are respectively 170-172 DEG C, 175-177 DEG C, 180-183 DEG C and 180-183 DEG C. The prepared migration-resistant soft PVC can be used for effectively inhibiting migration of the plasticizer in a product, and the adopted plasticizer is a bio-based product, so that the development requirement of being environmentally-friendly of the plasticizer is met.
Description
technical field [0001] The invention belongs to the technical field of plasticizer preparation, and in particular relates to a preparation method of migration-resistant soft PVC. Background technique [0002] Environmental pollution and harm to human health caused by plasticizers are long-term concerns. Trace plasticizers in the environment are pollutants that disturb the ecological balance and damage human health. Existing studies have found that plasticizers with different contents have been detected in food, children's toys, drinking water, the atmosphere, ships, airplanes and other substances and environments. Now it can be said that there are plasticizers everywhere. Many countries have stipulated the minimum value of plasticizers allowed in the environment and established strict regulations on the safe use of plasticizers. In July 2005, the European Union decided to ban the sale of soft PVC baby bite toys containing phthalates in the market; the U.S. Food and Drug A...
Claims
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Application Information
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