Preparation method of regenerated polyester (PET)
A technology for regenerating polyester and polyester, which is applied in the directions of melt spinning, single-component polyester rayon, and filament forming treatment to achieve the effects of simple preparation process, improved recycling quality and efficiency, and easy operation.
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[0006] The preparation method of a kind of regenerated polyester of the present invention is mainly based on the difference in viscosity between the PET plastic bottle and polyester waste silk, and from the aspect of viscosity complementarity, the two are prepared according to a certain ratio to produce a product with high recycled quality. The operation is as follows: first, soak polyester waste silk in water at a temperature of 50-60°C for 1 hour, wash off the grease, and then dry it with a high-speed centrifuge; then crush the dried polyester waste silk, Then use a grouping machine to group it to form polyester particles until the diameter of the polyester particles is within 1cm (that is, if the polyester particles formed by grouping after primary crushing do not meet this requirement, secondary crushing is required); take the polyester particle The granules and the crushed PET bottle flakes are mixed and stirred at a weight ratio of 1:4, and then the mixture formed after m...
Embodiment 1
[0009] The recovered PET plastic bottles are crushed by a crusher to form PET bottle flakes for later use. At the same time, the polyester waste silk is soaked in water at a temperature of 50°C for 1 hour, and the grease is washed away, and then used in a high-speed centrifuge Dry it; then crush the dried polyester waste silk, and then use a grouping machine to group it to form polyester particles until the diameter of the polyester particle is within 1cm; take the polyester particle and the crushed PET The bottle flakes are mixed and stirred at a weight ratio of 1:4, and then the mixture formed after mixing and stirring is dried at 200°C until the moisture content is lower than 50 ppm; finally, the dried mixed The body is melt-spun to obtain the regenerated polyester.
Embodiment 2
[0011] The recovered PET plastic bottles are crushed by a crusher to form PET bottle flakes for use. At the same time, the polyester waste silk is soaked in water at a temperature of 55°C for 1 hour, and the grease is washed away, and then the high-speed centrifuge is used to Dry it; then crush the dried polyester waste silk, and then use a grouping machine to group it to form polyester particles until the diameter of the polyester particle is within 1cm; take the polyester particle and the crushed PET The bottle flakes are mixed and stirred at a weight ratio of 1:4, and then the mixture formed after mixing and stirring is dried at 180°C until the moisture content is lower than 50 ppm; finally, the dried mixed The body is melt-spun to obtain the regenerated polyester.
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