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Preparation method of polylactic acid transparent straw

A polylactic acid and straw technology, which is applied in the polymer field to achieve high transparency, expand application fields, and reduce white pollution.

Inactive Publication Date: 2018-12-11
ANHUI JUMEI BIOLOGICAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, PLA has been widely used in film products, injection molding products, and plastic-absorbing products. Related literature and patents of polylactic acid straws and bendable straws have not yet been reported.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] The PLA of 94 parts by weight, the polyethylene oxide of 3 parts by weight, the ParaloidKM-355P of 2 parts by weight, 0.8 parts by weight 2525, 0.2 parts by weight of EBS is added to a high-speed mixer and mixed at 200r / min for 3 minutes, and the mixed material is added to a twin-screw extruder with a length-to-diameter ratio of 52:1 for extrusion, stripping, cooling, and slicing to obtain PLA Special modified resin for drinking straws, the twin-screw extruder barrel temperature is 160°C, and the die head temperature is 165°C; the special modified resin for PLA drinking straws is put into the beverage straw manufacturing unit for extrusion, shaping, pulling, cooling, and cutting to obtain transparent polymer. Straight lactic acid pipe, in which the screw length-to-diameter ratio of the straw manufacturing unit is 30:1, the temperature of the barrel is 160°C, the die is equipped with a melt pump, the temperature of the die is 165°C, and the temperature of the cooling wat...

Embodiment 2

[0013] 96.5 parts by weight of PLA, 2 parts by weight of polyethylene oxide, 1 part by weight of ParaloidKM-355P, 0.4 parts by weight 2525, 0.1 parts by weight of EBS is added to a high-speed mixer and mixed at 200r / min for 3 minutes, and the mixed material is added to a twin-screw extruder with a length-to-diameter ratio of 52:1 for extrusion, stripping, cooling, and slicing to obtain PLA Special modified resin for straws, extruder barrel temperature is 160°C, die head temperature is 165°C; PLA straw special modified resin is put into beverage straw manufacturing unit for extrusion, shaping, pulling, cooling, and cutting to obtain transparent polylactic acid. Pipe, wherein the length-to-diameter ratio of the screw of the straw manufacturing unit is 30:1, the temperature of the barrel is 160°C, a melt pump is installed on the die head, the temperature of the die head is 165°C, and the temperature of the cooling water is kept within the range of 40-50°C. Put the transparent po...

Embodiment 3

[0015] The PLA of 95.4 parts by weight, the polyethylene oxide of 2.5 parts by weight, the ParaloidKM-355P of 1.5 parts by weight, 0.45 parts by weight 2525, 0.15 parts by weight of EBS is added to a high-speed mixer and mixed at 200r / min for 3 minutes, and the mixed material is added to a twin-screw extruder with a length-to-diameter ratio of 52:1 for extrusion, stripping, cooling, and slicing to obtain PLA Special modified resin for drinking straws. The barrel temperature of the extruder is 160°C, the die head temperature is 165°C, and the cooling water temperature is kept within the range of 40-50°C. Put the modified resin specially used for drinking straws into the drinking straw manufacturing unit for extrusion and shaping , traction, cooling, and cutting to obtain transparent polylactic acid straight tubes, in which the length-to-diameter ratio of the screw of the straw manufacturing unit is 30:1, the temperature of the barrel is 160°C, and the die head is equipped with ...

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Abstract

The invention discloses a preparation method of a polylactic acid transparent straw. According to the preparation method, 94-96% of PLA, 2-3% of PEO, 1-2% of ParaloidKM-355P, 0.4-0.8% of VINNEX*2525 and 0.1-0.2% of EBS. The preparation method comprises the following steps of: adding the PLA into a double-screw extruder, adding the PEO, the ParaloidKM-355P, the VINNEX*2525 and the EBS into the double-screw extruder from a side feeding port, and carrying out extrusion, bracing, cooling, drying and slicing to obtain a modified resin for PLA straws, wherein a barrel temperature is 160 DEG C, a diehead temperature is 165 DEG C and a screw length-diameter ratio of the extruder is 52: 1; adding the obtained modified resin for PLA straws into a beverage straw manufacturing machine to carry out extrusion, traction, cooling and trimming so as to obtain a transparent a polylactic acid straight tube, wherein the barrel temperature is 160 DEG C, the die head is additionally provided with a melt pump, the die head temperature is 165 DEG C, and a cooling water temperature is 40-50 DEG C; and putting the transparent a polylactic acid straight tube into a full-automatic bendable straw forming machine to obtain a PLA high-transparency straw. According to the preparation method, the PLA application field is extended, traditional PP straws can be replaced so that the white pollution can be decreased, and the PLA is a natural bacteriostasis material and is beneficial for human health.

Description

technical field [0001] The invention relates to the technical field of polymers, in particular to a preparation method of polylactic acid transparent straws. Background technique [0002] In the past, the straws were all non-biodegradable PP straws, which would cause white pollution after being discarded and destroy the ecological environment. bigger and bigger. In the past, straws were mainly made of polypropylene. Traditional polypropylene straws are not biodegradable, and will produce white pollution after use, affecting the ecological environment. PLA is a biodegradable polymer material obtained through a series of physical and chemical reactions with corn starch as the main raw material. It not only has biodegradability, but also has natural antibacterial function. At present, PLA has been widely used in film products, injection molding products, and blister products. Related literature and patents of polylactic acid straws and bendable straws have not yet been report...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08L71/02C08K5/20B29D23/00
CPCB29D23/001C08L67/04C08L2201/10C08L71/02C08K5/20
Inventor 王凤洋鲁帆
Owner ANHUI JUMEI BIOLOGICAL TECH
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