Special black master batch for polylactic acid based degradable plastics and preparation method thereof

Abstract

The invention discloses a special black master batch for polylactic acid based degradable plastics and a preparation method thereof. The special black master batch for polylactic acid based degradable plastics comprises the following components in percentage by weight: 20-40% of pigment carbon black, 15-30% of dispersing lubricant and 40-65% of carrier resin, wherein the carrier resin adopts polylactic acid. In the special black master batch for polylactic acid based degradable plastics, the polylactic acid carrier resin is taken as a basic component, and interacted with the pigment carbon black, the dispersing lubricant and the like in the extrusion process, thus special black master batch for polylactic acid based degradable plastics has the advantages of good compatibility and easy dispersing. In the process of preparing the plastics by using the special black master batch for polylactic acid based degradable plastics, the black master batch is used a little, the prepared plastic is good in mechanical behaviors, easy in degradation, and economic and environmentally friendly. In the preparation method, the process is simple, and the cost is low; and the preparation method is suitable for industrialized production.

Description

technical field

[0001] The invention belongs to the technical field of chemical industry, and in particular relates to a black masterbatch specially used for polylactic acid-based degradable plastics and a preparation method thereof. Background technique

[0002] Polylactic acid (PLA) is a novel biodegradable material made from starch raw materials proposed from renewable plant resources such as corn. The starch raw material is fermented into lactic acid, which is then converted into polylactic acid through chemical synthesis. It has good biodegradability and can be completely degraded by microorganisms in nature after use, eventually producing carbon dioxide and water without polluting the environment, which is very beneficial to protecting the environment and is recognized as an environmentally friendly material. Polylactic acid is suitable for various processing methods such as blow molding and thermoplastic, and is easy to process and widely used. It can be used to pro...

Examples

preparation example Construction

[0028] The embodiment of the present invention also provides the above-mentioned black masterbatch preparation method specially used for polylactic acid-based degradable plastics, the process flow is as follows figure 1 shown. The method comprises the steps of:

[0029] S1: Weigh and pre-mix each component according to the above-mentioned black masterbatch formula specially used for polylactic acid-based degradable plastics;

[0030] S2: banburying the mixed material formed by premixing;

[0031] S3: Extrude and granulate the mixed material after banburying to obtain the black masterbatch specially used for polylactic acid-based degradable plastics.

[0032] Specifically, in the S1 step of the above-mentioned black masterbatch preparation method dedicated to polylactic acid-based degradable plastics, the pre-mixing is to mix the components weighed according to the formula preferably at a speed of 800-2000 rpm for 5- For 30 minutes, the components were allowed to mix to form...

Embodiment 1

[0038] Black masterbatch formulation for polylactic acid-based degradable plastics:

[0039] 40% PLA plastic, 40% pigment carbon black with a particle size of 30nm, and 20% dispersed lubricant

[0040] Wherein, the composition of the dispersant is: 10% of polyethylene wax with an initial melting temperature of 100°C and a molecular weight of 5000, and 10% of EBS with an initial melting temperature of 140°C.

[0041] Its preparation method: first pre-mix the components in a high-speed mixer in proportion, the speed is 2000 rpm, and the mixing time is 5 minutes, then banburying in the internal mixer, the banburying time is 5 minutes, and then mixing The mixed material after refining is added to the twin-screw extruder for extrusion, and the required black masterbatch is obtained after cooling, drying and pelletizing. ℃, the temperature of the second stage is 220°C, the temperature of the third stage is 210°C, the temperature of the fourth stage is 180, the temperature of the fi...

Embodiment 2

[0043] Black masterbatch formulation for polylactic acid-based degradable plastics:

[0044] 65% of PLA plastic, 20% of pigment carbon black with a particle size of 10nm, and 15% of dispersed lubricant.

[0045] Wherein, the composition of the dispersant is: 5% of polyethylene wax with an initial melting temperature of 106°C and a molecular weight of 3000, and 10% of EBS with an initial melting temperature of 150°C.

[0046]Its preparation method: first pre-mix the components in a high-speed mixer in proportion, the speed is 800 rpm, and the mixing time is 30 minutes, then banburying in the internal mixer, the banburying time is 8 minutes, and then mixing The mixed material after refining is added to the twin-screw extruder for extrusion, and the required black masterbatch is obtained after cooling, drying, and pelletizing. The temperature of each section of the mixed material in the twin-screw extruder is: the temperature of the first section is 180°C , The temperature of th...

technical field

[0001] The invention belongs to the technical field of chemical industry, and in particular relates to a black masterbatch specially used for polylactic acid-based degradable plastics and a preparation method thereof. Background technique

[0002] Polylactic acid (PLA) is a novel biodegradable material made from starch raw materials proposed from renewable plant resources such as corn. The starch raw material is fermented into lactic acid, which is then converted into polylactic acid through chemical synthesis. It has good biodegradability and can be completely degraded by microorganisms in nature after use, eventually producing carbon dioxide and water without polluting the environment, which is very beneficial to protecting the environment and is recognized as an environmentally friendly material. Polylactic acid is suitable for various processing methods such as blow molding and thermoplastic, and is easy to process and widely used. It can be used to pro...

Examples

preparation example Construction

[0028] The embodiment of the present invention also provides the above-mentioned black masterbatch preparation method specially used for polylactic acid-based degradable plastics, the process flow is as follows figure 1 shown. The method comprises the steps of:

[0029] S1: Weigh and pre-mix each component according to the above-mentioned black masterbatch formula specially used for polylactic acid-based degradable plastics;

[0030] S2: banburying the mixed material formed by premixing;

[0031] S3: Extrude and granulate the mixed material after banburying to obtain the black masterbatch specially used for polylactic acid-based degradable plastics.

[0032] Specifically, in the S1 step of the above-mentioned black masterbatch preparation method dedicated to polylactic acid-based degradable plastics, the pre-mixing is to mix the components weighed according to the formula preferably at a speed of 800-2000 rpm for 5- For 30 minutes, the components were allowed to mix to form...

Embodiment 1

[0038] Black masterbatch formulation for polylactic acid-based degradable plastics:

[0039] 40% PLA plastic, 40% pigment carbon black with a particle size of 30nm, and 20% dispersed lubricant

[0040] Wherein, the composition of the dispersant is: 10% of polyethylene wax with an initial melting temperature of 100°C and a molecular weight of 5000, and 10% of EBS with an initial melting temperature of 140°C.

[0041] Its preparation method: first pre-mix the components in a high-speed mixer in proportion, the speed is 2000 rpm, and the mixing time is 5 minutes, then banburying in the internal mixer, the banburying time is 5 minutes, and then mixing The mixed material after refining is added to the twin-screw extruder for extrusion, and the required black masterbatch is obtained after cooling, drying and pelletizing. ℃, the temperature of the second stage is 220°C, the temperature of the third stage is 210°C, the temperature of the fourth stage is 180, the temperature of the fi...

Embodiment 2

[0043] Black masterbatch formulation for polylactic acid-based degradable plastics:

[0044] 65% of PLA plastic, 20% of pigment carbon black with a particle size of 10nm, and 15% of dispersed lubricant.

[0045] Wherein, the composition of the dispersant is: 5% of polyethylene wax with an initial melting temperature of 106°C and a molecular weight of 3000, and 10% of EBS with an initial melting temperature of 150°C.

[0046]Its preparation method: first pre-mix the components in a high-speed mixer in proportion, the speed is 800 rpm, and the mixing time is 30 minutes, then banburying in the internal mixer, the banburying time is 8 minutes, and then mixing The mixed material after refining is added to the twin-screw extruder for extrusion, and the required black masterbatch is obtained after cooling, drying, and pelletizing. The temperature of each section of the mixed material in the twin-screw extruder is: the temperature of the first section is 180°C , The temperature of th...

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