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A composite additive for improving the transparency of polyolefin, its preparation method and application
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A composite auxiliary agent and polyolefin technology, which is applied to the composite auxiliary agent for improving the transparency of polyolefin, its preparation and its application field, can solve the problems of uneven dispersion of the auxiliary agent, affecting the overall performance of plastic products, and white spots appearing in products. Achieve the effect of improving transparency, reducing haze, and shortening the preparation process
Active Publication Date: 2017-09-26
SINOPEC YANGZI PETROCHEM +1
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Problems solved by technology
The relatively single production process can no longer meet the requirements of certain formulations, and the additives cannot be produced in accordance with the proportion of the additive formula provided by the polyolefin production plant, and the produced additives are unevenly dispersed in the matrix, resulting in white spots in the product and other problems. , thus affecting the overall performance of plastic products
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Embodiment 1
[0018] Put the additives into the high-speed mixer according to the following weight percentages, and mix for more than 10 minutes:
[0023] The mixed dry powder is added from the top of the equipment, degassed and screw pre-pressed into the relatively closed cavity formed by the extrusion roller, and the material is plastically deformed and compressed into flaky. The flake materials are then crushed, granulated, sieved and other processes to obtain granular compound additives. Mix compound additives and polypropylene PPH-T03-H at a mass ratio of 0.25%:1, then granulate with twin-screw at 180-220°C, and prepare samples for testing.
Embodiment 2
[0025] Under the constant situation of other conditions of embodiment 1, auxiliary agent is added high-speed mixer according to following weight percent:
[0031] Under the constant situation of other conditions of embodiment 1, auxiliary agent is added high-speed mixer according to following weight percent:
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Abstract
The invention relates to a composite auxiliary agent for improving the transparency of polyolefin, its preparation method and its application. The raw materials of the composite auxiliary agent include the following components: hindered phenol primary antioxidant: 5%-25%, phosphite auxiliary antioxidant Agent: 2%-20%, fatty acidmetal salt: 1%-10%, and the rest is nucleating agent. The obtained composite auxiliary agent for improving the transparency of polyolefin can effectively reduce the haze of polyolefin, improve the transparency of polyolefin, and improve the problem of white spots caused by uneven dispersion of the composite auxiliary agent when the content of the nucleating agent is high. The additive molding process is simple, the preparation process is short, and there is no need to heat the additive mixture and add organic solvents during the granulation process.
Description
technical field [0001] The invention specifically relates to a composite auxiliary agent for improving the transparency of polyolefin, its preparation method and its application. Background technique [0002] With the improvement of people's living standards, the aesthetic requirements for products are also increasing. Products with high transparency and high gloss are favored by more packaging manufacturers and consumers. The method of improving the transparency of polypropylene by using a nucleating agent has the characteristics of convenience and high efficiency. In order to improve the production operation environment, increase the accuracy of additive addition and metering, and facilitate strict control of the production process, domestic large-scale polyolefin manufacturers usually choose granulated additives, that is, to granulate additives with various functions and components to make them with A compound additive with multiple effects integrated. [0003] In recen...
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