Polyvinyl chloride material with high oxygen permeability and preparation method thereof
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A technology of polyvinyl chloride and polyvinyl chloride resin, applied in the field of modified polyvinyl chloride materials and their preparation, can solve the problems of difficult processing of PVC materials, short survival time of platelets, high melt viscosity, etc., to ensure safety, Ensure low temperature resistance and extraction resistance, and improve air permeability
Inactive Publication Date: 2014-09-17
上海新上化高分子材料有限公司 +1
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[0004] U.S. Patent No. 4,280,497 uses TOTM as a plasticizer to prepare PVC materials for platelet preservation, but it has problems such as low oxygen permeability and short platelet survival time during use; U.S. Patent No. 6,060,138 uses ultra-high molecular weight PVC, TOTM , epoxy vegetable oil, calcium-zinc stabilizer and mineral oil, although the elastic medical material can obtain ideal oxygen permeability, but because of the use of high-polymerization PVC as the base resin, and the use of plasticizers with higher molecular weight TOTM, in actual production, the melt viscosity is too high, making PVC materials difficult to process
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Embodiment 1
[0027] Formula: (parts by weight)
[0028]
[0029] Preparation steps:
[0030] Mixing: Add PVC, plasticizer, and auxiliary plasticizer to the high-speed mixer, set the speed to 360rpm, add stabilizer and antioxidant after 1min, add lubricant after 3min, mix to 130℃ and cool down The mixer has a speed of 10 rpm, and the material is discharged when the temperature of the material reaches 40°C.
[0031] Granulation: Add the above-mentioned cooling material into a twin-screw extruder for extrusion granulation. The barrel temperature is: Zone I 100℃, Zone II 130~℃, III150℃, IV150℃, die temperature 155℃, screw speed 70rpm , The material is plasticized by the extruder and then granulated by air cooling. Get the product.
[0032] The ASTM D1434-82 standard was used for testing, and the results are shown in Table 1.
Embodiment 2
[0034]
[0035] Mixing: Add PVC, plasticizer, and auxiliary plasticizer to the high-speed mixer, set the speed to 360rpm, add stabilizer and antioxidant after 1min, add lubricant after 3min, mix to 110℃ and cool down The mixer has a speed of 10 rpm, and the material is discharged when the temperature of the material reaches 50°C.
[0036] Granulation: Add the above-mentioned cooling materials to a twin-screw extruder for extrusion granulation. The barrel temperature is: 120°C in zone I, 150°C in zone II, 160°C in III, 160°C in IV, 160°C, die temperature 165°C, screw speed 70rpm, The material is plasticized by the extruder and then granulated by air cooling. Get the product.
[0037] The test results are shown in Table 1.
Embodiment 3
[0039]
[0040]
[0041] The preparation method is the same as in Example 1.
[0042] Table 1 Oxygen transmission rate of different examples
[0043] Numbering
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Abstract
The invention discloses a polyvinyl chloride material with high oxygen permeability and a preparation method thereof. The polyvinyl chloride material with high oxygen permeability comprises the following components in parts by weight: 60 parts of polyvinyl chloride resin with super-high molecular weight, 30-40 parts of polyvinyl chloride resin with middle molecular weight, 40-80 parts of plasticizer TOTM (Trioctyl Trimellitate), 5-20 parts of plasticizer DOA (Dioctyl Adipate), 0-20 parts of plasticizer DOS (Dioctyl Sebacate), 3-10 parts of secondary plasticizer and 0.5-5 parts of calcium and zinc thermal stabilizer. The basic resin used in the material disclosed by the invention is polyvinyl chloride resin which has high oil absorption and is prepared by a super-high molecular weight and middle molecular weight suspension method, the plasticizer TOTM with low mobility is selected, the cold-resistant plasticizers DOA and DOS are compounded in use, and epoxy plant oil plasticizer with the thermal stabilizing effect is used as an assistant, so that the low-temperature resistance and extraction resistance of the product are ensured, and the material has a high gas exchange rate and characteristic of high oxygen permeability and is suitable for blood storage, and particularly suitable for storage of blood platelets. The prepared PVC material with high oxygen permeability can make sure that blood platelets can be stored for 7 days at 22 DEG C, so that the material is suitable for preparation of blood platelet storage bags.
Description
Technical field [0001] The invention relates to a modified polyvinyl chloride (PVC) material and a preparation method thereof. Background technique [0002] Polyvinyl chloride (PVC) is widely used in various fields due to its low cost and good comprehensive performance, and is currently one of the most widely used plastics. Plasticized PVC can also be used as a packaging material for whole blood, red blood cells and platelets. With the development of the medical industry and the accumulation of clinical experience and data, PVC has elasticity, migration resistance, volatility, Low temperature resistance, high temperature disinfection and stickiness, etc., due to insufficient air permeability when platelets are stored, limit its application in disposable medical appliances. [0003] The most commonly used plasticizer for PVC materials is dioctyl phthalate (DOP), and citrate plasticizers are often used for blood preservation. At present, PVC-DOP is the most widely used for whole bl...
Claims
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Application Information
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