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PLA heat-resistant knife, fork and spoon and production method

A cutlery, heat-resistant technology, applied in the field of polymer materials, can solve the problems of easy softening, loss of basic functions of cutlery and spoons, and inability to meet the use function of tableware, so as to improve heat resistance, improve product application range, and facilitate high efficiency. The effect of processing

Inactive Publication Date: 2021-05-11
NANJING PRIDE PLASTIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Products such as PLA knives, forks and spoons will come into contact with hot food during use, and they will easily soften during use, resulting in the loss of basic functions of the cutlery and spoons, which cannot meet the functions of tableware.

Method used

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  • PLA heat-resistant knife, fork and spoon and production method
  • PLA heat-resistant knife, fork and spoon and production method
  • PLA heat-resistant knife, fork and spoon and production method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Embodiment 1: PLA heat-resistant cutlery, its raw materials include: racemic polylactic acid 77.5kg, polybutylene succinate 10kg, talcum powder 10kg, EBS dispersant 1kg, TMC-306 polylactic acid nucleating agent 1kg, antioxidant 1010 0.5kg.

[0024] The preparation process is as follows:

[0025] S1: Preparation of polylactic acid from lactic acid by a two-step method, prepolymerization with a catalyst at 125°C and a vacuum of -80Kpa to prepare a polylactic acid prepolymer, and then high temperature cracking at 200°C to obtain crude lactide. Lactide is purified by recrystallization to obtain refined lactide;

[0026] S2: Add catalyst to purified lactide, polymerize polylactic acid at 120°C and vacuum degree of -90KPa, mix poly-L-lactic acid and poly-D-lactic acid to prepare racemic polylactic acid, and cut into pellets for later use;

[0027] S3: Add racemic polylactic acid, polybutylene succinate, TMC-306 polylactic acid nucleating agent, talcum powder, EBS dispersant...

Embodiment 2

[0031] Embodiment 2: PLA heat-resistant cutlery, its raw materials include: racemic polylactic acid 53kg, polybutylene succinate 14.5kg, talcum powder 30kg, EBS dispersant 1.5kg, TMC-300 polylactic acid nucleation Agent 0.5kg, antioxidant 1076 0.5kg.

[0032] S1: Preparation of polylactic acid from lactic acid by two-step method, prepolymerization with catalyst at 130°C and vacuum degree of -80Kpa to prepare polylactic acid prepolymer, and then high temperature cracking at 220°C to obtain crude lactide, and crude lactide Lactide is purified by recrystallization to obtain refined lactide;

[0033] S2: Add catalyst to purified lactide, polymerize polylactic acid at 140°C and vacuum degree of -99KPa, mix poly-L-lactic acid and poly-D-lactic acid to prepare racemic polylactic acid, and cut into pellets for later use;

[0034] S3: Add racemic polylactic acid, polybutylene succinate, TMC-300 polylactic acid nucleating agent, talcum powder, EBS dispersant and antioxidant 1076 to the...

Embodiment 3

[0038] Embodiment 3: PLA heat-resistant knife, fork and spoon, its raw materials include: racemic polylactic acid 65kg, polybutylene succinate 14kg, calcium carbonate 19.2kg, EBS dispersant 0.5kg, TMC-306 polylactic acid nucleation Agent 0.5kg, antioxidant 164 0.8kg.

[0039] The preparation process is as follows:

[0040] S1: Preparation of polylactic acid from lactic acid by two-step method. Under the condition of 140°C and vacuum degree of -80Kpa, catalyst prepolymerization was added to prepare polylactic acid prepolymer, and then high temperature cracking at 230°C to obtain crude lactide. Lactide is purified by recrystallization to obtain refined lactide;

[0041] S2: Add catalyst to purified lactide, polymerize polylactic acid at 140°C and vacuum degree of -89KPa, mix poly-L-lactic acid and poly-D-lactic acid to prepare racemic polylactic acid, and pelletize for later use;

[0042] S3: Add polylactic acid, polybutylene succinate, TMC-306 polylactic acid nucleating agent...

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Abstract

A PLA material used by a PLA heat-resistant knife, fork and spoon of the invention comprises the following components in parts by weight: 40-80 parts of racemic polylactic acid; 10-30 parts of aliphatic polyester; 0.5-1 part of a nucleating agent; 5-30 parts of an inorganic filler; 0.3-3 parts of a dispersant; and 0.3-1 part of an antioxidant. The PLA heat-resistant knife, fork and spoon has effectively improved heat resistance, meets the high-temperature use requirement, can be stably formed, and is beneficial to efficient processing and production.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a PLA heat-resistant knife, fork and spoon. Background technique [0002] Disposable knives, forks and spoons are fast food tableware commonly used in daily life. The main function is to cut food and scoop soup. Disposable knives, forks and spoons are widely used as food tableware in the fast food catering industry, such as pizza, snacks and fast food, etc., and their materials are mainly plastic materials such as PP. Due to serious environmental pollution, biodegradable materials are being promoted to replace traditional non-degradable plastics. Currently commonly used PLA materials (polylactic acid) are derived from natural raw materials such as corn, which not only reduces the dependence on petroleum resources, but also reduces the emission of pollutant gases such as nitrogen oxides and sulfur oxides during the refining process. Polylactic acid products can be natu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08L67/02C08K3/34C08K5/20C08K5/134C08K13/02
CPCC08L67/04C08L2205/025C08L2205/02C08L2205/03C08L2205/035C08L2201/08C08L67/02C08K3/34C08K5/20C08K5/1345C08K13/02
Inventor 陈光泽戴春发王仕杰吴立丰
Owner NANJING PRIDE PLASTIC TECH
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