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Biodegradable straw and preparation method thereof

A straw and biological technology, which is applied to straw materials and their preparation, biodegradable straws and their preparation fields, can solve the problems of poor mechanical properties, easy breeding of harmful microorganisms, low heat-resistant temperature and easy degradation, etc., so as to improve strength, reduce Hydrolysis phenomenon, the effect of improving compatibility

Active Publication Date: 2020-04-21
NANJING PRIDE PLASTIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Purpose of the invention: In view of the problems of poor mechanical properties, low heat-resistant temperature, easy degradation, and easy breeding of harmful microorganisms in the existing polylactic acid straw materials, the present invention provides a biodegradable straw. In addition, it also provides a A kind of preparation method of this biodegradable straw

Method used

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  • Biodegradable straw and preparation method thereof
  • Biodegradable straw and preparation method thereof
  • Biodegradable straw and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The weight content of each raw material component in the biodegradable straw is:

[0020]

[0021] The preparation process of biodegradable straws is as follows:

[0022] (1) Add 6.3 parts of bamboo powder to the high-speed mixer, set the equipment temperature to 80°C, and set the stirring speed to 500r / min. After turning on the equipment, slowly add 0.6 parts of aluminum-titanium coupling agent from the feeding port and continue stirring After 10min, close the equipment to form bamboo powder pretreatment material.

[0023] (2) Do the ingredients according to the set ratio, first add 80 parts of PLA and 10 parts of PHA to the high-speed mixer, set the stirring speed to 100r / min, after turning on the equipment, first add 2 parts of epoxy soybean oil, and then Add bamboo powder pretreatment material, lubricant and anti-hydrolysis agent, and continue to stir for 10 minutes to form a polylactic acid mixture.

[0024] (3) Add the polylactic acid mixture to the twin-scre...

Embodiment 2

[0026] The weight content of each raw material component in the biodegradable straw is:

[0027]

[0028] The biodegradable straw is prepared with reference to the preparation process of Example 1, the difference is:

[0029] (1) Stirring temperature is 100 DEG C in step 1, and stirring speed is 1000r / min, after adding aluminum-titanium coupling agent, continue to stir for 15min to form bamboo powder pretreatment material;

[0030] (2) In step 3, the extrusion temperature is 150° C., the die head temperature is 160° C.; the cooling temperature is 42° C.; the pulling speed is 1.5 m / s.

Embodiment 3

[0032] The weight content of each raw material component in the biodegradable straw is:

[0033]

[0034] The biodegradable straw is prepared with reference to the preparation process of Example 1, the difference is:

[0035] (1) Stirring temperature is 90 DEG C in step 1, and stirring speed is 600r / min, after adding aluminum-titanium coupling agent, continue to stir for 12min to form bamboo powder pretreatment material;

[0036] (2) In step 3, the extrusion temperature is 160° C., the die head temperature is 200° C.; the cooling temperature is 50° C.; the pulling speed is 1 m / s.

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Abstract

The invention discloses a biodegradable straw and a preparation method thereof. The straw comprises, by mass, 50%-80% of polylactic acid, 10%-40% of polyhydroxyalkanoate, 3%-12% of bamboo powder, 1%-2% of epoxidized soybean oil, 0.3%-1% of an aluminum-titanium coupling agent, 0.1%-1% of a lubricating agent and 0.1%-1% of an anti-hydrolysis agent. The preparation method comprises the following steps: uniformly stirring the bamboo powder and the aluminum-titanium coupling agent to obtain a bamboo powder pretreated material for later use; sequentially adding the epoxidized soybean oil, the bamboopowder pretreated material, the lubricant and the anti-hydrolysis agent into a resin mixture of the polylactic acid and the polyhydroxyalkanoate at a stirring speed of 100-250 r / min, and uniformly stirring to form a polylactic acid mixture; and adding the polylactic acid mixture into double-screw extrusion equipment, extruding a straw blank, and sequentially carrying out water cooling, air cooling, water removal and cutting on the straw blank under the traction of traction equipment to obtain the biodegradable straw product. The biodegradable straw material can effectively prolong the degradation time of the PLA straw, improve the mechanical properties of the PLA straw, and effectively improve the harmful bacterium inhibition ability of the straw.

Description

technical field [0001] The invention relates to a straw material and a preparation method thereof, in particular to a biodegradable straw and a preparation method thereof, and belongs to the technical field of polymer materials and processing thereof. Background technique [0002] Straw products are supplies for drinking various beverages. It greatly facilitates people's daily diet and life, and has become an indispensable article in daily life. However, traditional straw materials are usually polypropylene, etc., and the extensive use of these plastic straws, which have no recycling value and cannot be quickly degraded, has caused serious white pollution to people's living environment. Based on this, people began to use biodegradable material polylactic acid to replace traditional polypropylene straws. [0003] However, due to problems such as hardness, brittleness and poor toughness, polylactic acid materials cannot meet the production and molding requirements of existing...

Claims

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Application Information

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IPC IPC(8): C08L67/04C08L97/02C08L91/00C08K5/10C08K5/20
CPCC08L67/04C08L2201/06C08L2201/08C08L2205/035C08L2205/025C08L97/02C08L91/00C08K5/10C08K5/20
Inventor 李进吴兴旺刘之烨戴春发王仕杰吴立丰
Owner NANJING PRIDE PLASTIC TECH
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