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Heat-resistant full-biodegradable straw and preparation method thereof

A technology of all-biological straws, applied in the field of heat-resistant full-biodegradable straws and its preparation, can solve problems such as non-conformity with use standards, poor heat resistance, and inability to use hot drinks

Pending Publication Date: 2021-05-11
WUHAN HUALI ENVIRONMENT PROTECTION SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the fully degradable straw products on the market are mixed, and most of them do not meet the use standards. Due to poor performance, especially due to poor heat resistance, they cannot be used for hot drinks, which greatly limits the scope of use.

Method used

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  • Heat-resistant full-biodegradable straw and preparation method thereof
  • Heat-resistant full-biodegradable straw and preparation method thereof
  • Heat-resistant full-biodegradable straw and preparation method thereof

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preparation example Construction

[0033] The present invention also provides the preparation method of the above-mentioned heat-resistant fully biodegradable straw, comprising the following steps:

[0034] 1) Put the inorganic filler, biomass filler, lubricant and compatibilizer into the high-temperature mixing equipment, and stir at 1000rpm-3000rpm for 15-20min at 130-150°C;

[0035] 2) Add fully biodegradable resin, chain extender, and nucleating agent to the mixture prepared in step 1), mix well, put it into a mixer at 120-220°C for 10-15 minutes;

[0036] 3) putting the blend obtained after banburying in step 2) into a twin-screw extruder, extruding and granulating at 130-220° C. to obtain a heat-resistant fully biodegradable straw material;

[0037] 4) extruding the obtained heat-resistant fully biodegradable straw material into a tube shape with a straw extruder;

[0038] 5) Put the pipe obtained in step 4) into the post-processing equipment, the heating temperature inside the post-processing equipment ...

Embodiment 1

[0042] This embodiment provides a heat-resistant fully biodegradable straw, including the following components in parts by mass: 100 parts of polylactic acid, 3 parts of sodium silicate, 2 parts of diisocyanate, 30 parts of calcium carbonate, 1 part of aluminate, 1 part of calcium stearate, 25 parts of starch.

[0043] This embodiment also provides the preparation method of the above-mentioned heat-resistant fully biodegradable straw, including the following steps:

[0044] 1) Put calcium carbonate, starch, calcium stearate and aluminate into high-temperature mixing equipment, and stir at 2000rpm for 15min at 135°C;

[0045] 2) Add polylactic acid, diisocyanate, and sodium silicate to the mixture prepared in step 1), mix well, and put it into an internal mixer at 135°C for 10 minutes;

[0046] 3) Put the blend obtained after step 2) into a twin-screw extruder, extrude and granulate at 180°C to obtain a heat-resistant fully biodegradable straw material;

[0047] 4) Extrude th...

Embodiment 2

[0058] This embodiment provides a heat-resistant fully biodegradable straw, which includes the following components in parts by mass: 70 parts of polylactic acid, 30 parts of polybutylene succinate, 4 parts of ethylene bisstearamide, p-phenylene 3 parts of diisocyanate, 30 parts of talc, 1.5 parts of aluminate, 1 part of stearic acid, 20 parts of starch.

[0059] This embodiment also provides a preparation method for the above-mentioned heat-resistant fully biodegradable straw, including the following steps:

[0060] 1) Put talcum powder, starch, stearic acid and aluminate into high-temperature mixing equipment, and stir at 1500 rpm for 15 minutes at 140°C;

[0061] 2) Add polylactic acid, polybutylene succinate, p-phenylene diisocyanate, and ethylene bisstearamide to the mixture prepared in step 1), mix well, and put it into a 135°C internal mixer for banburying for 15 minutes;

[0062] 3) Put the blend obtained after step 2) into a twin-screw extruder, extrude and granulate...

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Abstract

The invention belongs to the technical field of high polymer material processing, and particularly relates to a heat-resistant full-biodegradable straw which comprises the following components in parts by mass: 100 parts of full-biodegradable resin, 3-5 parts of a nucleating agent, 2-4 parts of a chain extender, 20-35 parts of an inorganic filler, 1-2 parts of a lubricant, 1-2 parts of a compatibilizer and 20-30 parts of a biomass filler. The preparation method comprises the following steps of: firstly, putting the inorganic filler, the biomass filler, the lubricant and the compatibilizer into high-temperature mixing equipment, stirring at a high speed for modification, then adding the full-biodegradable resin, the chain extender and the nucleating agent, uniformly mixing, then putting the raw materials into an internal mixer for internal mixing, putting the internally mixed blend into a double-screw extruder, extruding and granulating, then adding the obtained material into a suction tube extruder, extruding the material into a tube shape, then stretching the tube into post-processing equipment, enabling the tube to quickly pass through the equipment for secondary crystallization, and finally cutting the tube into a preset length. The heat resistance of the full-biodegradable straw can be remarkably improved, so that the full-biodegradable straw can be applied to more use scenes, the product value is improved, the processing efficiency is high, and better economic benefits are obtained.

Description

technical field [0001] The invention belongs to the technical field of polymer material processing, and in particular relates to a heat-resistant fully biodegradable straw and a preparation method thereof. Background technique [0002] The amount of discarded plastics in my country ranks first in the world. These discarded plastics not only pollute the environment and endanger health, but also occupy valuable land resources. Alternatives to degradable plastics are on the way. In the field of disposable straws, due to the low amount of plastic monomers, it is easy to pollute and difficult to separate efficiently, which makes degradable plastics more likely to become a substitute for traditional plastics in this field. [0003] At present, the fully degradable straw products on the market are mixed, and most of them do not meet the use standards. Due to poor performance, especially due to poor heat resistance, they cannot be used for hot drinks, which greatly limits the scope...

Claims

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Application Information

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IPC IPC(8): C08L67/04C08L67/02C08L3/02C08L97/02C08K3/34C08K5/29C08K3/26C08K13/02C08K5/098B29C48/09
CPCC08L67/04C08L67/02B29C48/022B29C48/09C08K2003/265C08L2201/08C08L2201/06C08L2205/03C08L3/02C08L97/02C08K3/34C08K5/29C08K3/26C08K13/02C08K5/098
Inventor 王继鑫曾勤高峰白娟
Owner WUHAN HUALI ENVIRONMENT PROTECTION SCI & TECH
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