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Preparation method of temperature-resistant PLA (polylactic acid) blister tableware

A tableware and temperature-resistant technology, which is applied in the field of preparation of temperature-resistant PLA plastic blister tableware, can solve the problems of not easy to make heat-resistant PLA products, small market for heat-resistant PLA products, hidden dangers of food safety, etc. The effect of simplified formula composition, high product quality stability and high heat resistance

Active Publication Date: 2022-08-05
台州玉米环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These two directions have limitations. The former is limited by the high price of PBS, low production capacity, and food safety hazards, and the market for heat-resistant PLA products is not large; Hot PLA products

Method used

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  • Preparation method of temperature-resistant PLA (polylactic acid) blister tableware
  • Preparation method of temperature-resistant PLA (polylactic acid) blister tableware
  • Preparation method of temperature-resistant PLA (polylactic acid) blister tableware

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Experimental program
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Effect test

preparation example Construction

[0056] (1) Preparation of PLA tableware-like embryos:

[0057] The raw materials of PLA blister tableware are blended and granulated by an extruder to prepare raw material particles of PLA blister tableware. The raw material particles are then extruded through the screw extruder to extrude the melt, pull the sheet, air setting, and roll the sheet to prepare a coil of PLA sheet with a predetermined thickness and width. (The thicknesses of the sheets used to make the blister lids and plates were 0.50 mm and 0.38 mm, respectively).

[0058] The PLA coil is pulled and unrolled, the sheet passes through the preheating table, negative pressure suction molding, and then the product is punched, the product is stacked, the waste is rolled, and the product is put into the box.

[0059] The raw material particles are pulled through the extruder, and then the sheet is prepared by the blister molding process. The PLA blister tableware produced is called blister tableware embryo. Usually ...

Embodiment 1

[0067] Take the PLA blister cup lid sample embryo with formula composition No. 1-3, place it in a mold container at 45°C, inject 4.5MPa carbon dioxide, soak it at constant temperature and pressure for 20min, quickly release the pressure at a speed of 16MPa / s, open the mold and take out the sample , and cooled at room temperature to obtain a PLA blister cup lid product. The density of the sample, the diameter of the lid and the temperature resistance were tested, and the results are shown in Table 2. After carbon dioxide treatment, the density of the sample has almost no change, and the appearance of the sample has no obvious change. All temperature resistance > 100 ℃.

Embodiment 2

[0069] Take the PLA blister cup lid sample embryo with formula composition No. 1-3, place it in a mold container at 65°C, inject 4.5MPa carbon dioxide, soak it at constant temperature and pressure for 20min, quickly release the pressure at a speed of 16MPa / s, open the mold and take out the sample , and cooled at room temperature to obtain a PLA blister cup lid product. The density of the sample, the diameter of the lid and the temperature resistance were tested, and the results are shown in Table 2. After carbon dioxide treatment, the density of the sample did not change much, and the appearance of the sample did not change significantly. The diameter of the cup lid was 1.40-2.06% smaller than that of the cup lid-like embryo, and the relative standard deviation was 0.16-0.39%. All temperature resistance > 100 ℃.

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Abstract

The invention belongs to the technical field of tableware, and relates to a preparation method of a temperature-resistant PLA blister tableware, which comprises the following steps: (1) PLA blister tableware raw materials are prepared into sheets through an extruder sheet pulling process, then the sheets are prepared into tableware sample blanks through a blister forming process, and the tableware sample blanks contain PLA which is not crystallized completely; and (2) soaking the tableware sample blank in carbon dioxide at constant temperature and constant pressure, so that the non-crystallized PLA in the tableware sample blank is crystallized, and the PLA tableware product with the temperature resistance higher than 100 DEG C is prepared. According to the preparation method of the temperature-resistant PLA blister tableware provided by the invention, the prepared PLA blister tableware has the advantages of temperature resistance and no deformation when being heated, is biodegradable, and is a new generation of environment-friendly blister tableware product.

Description

technical field [0001] The invention belongs to the technical field of tableware, and relates to a preparation method of a temperature-resistant PLA plastic suction tableware. Background technique [0002] Among plastic tableware products, there are a large category of products such as cups, bowls, plates, lunch boxes and lids, which are generally produced by plastic blister molding. The product manufacturing process is divided into two steps: first, the raw materials are made into sheets by the screw extruder pulling process, and then the sheets are formed by negative pressure or positive and negative pressure suction molding in a softened state, and then the products are punched out. The production speed of blister products is extremely fast, but the generated corner waste is also very large (almost half of the raw materials). In order to reduce production costs, the corner waste is generally returned to the front-end extrusion pull tab production as a return. material to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/12C08L67/04C08L67/02C08L99/00C08L97/02C08K3/34C08K3/26C08K3/36
CPCC08J9/122C08J9/0061C08J9/0066C08J2203/06C08J2203/08C08J2367/04C08J2467/02C08J2499/00C08J2497/02Y02P20/54Y02W90/10
Inventor 李文光刘永磊陈启早陶阳胡乾金宇杰黄国超朱玉婷
Owner 台州玉米环保科技有限公司
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