High-strength tableware particle material capable of being completely and naturally degraded and preparation method thereof

Abstract

The invention relates to a high-strength tableware particle material capable of being completely and naturally degraded and a preparation method of the high-strength tableware particle material. The high-strength tableware particle material is prepared from polyhydroxyalkanoate (PHAs), a modified natural organic plant fiber material, oxidized modified high-amylose starch, a composite plasticizer, a functional additive, a modifier and inorganic filler. Thethe particle material is obtained by carrying out melting reaction extrusion at 55-160 DEG C by virtue of a double-stage serial screw granulating unit, and carrying out mixing, reacting, extruding, cooling, cutting, drying, sterilizing and packaging. Various meal boxes, spoons, cups, bowls, dishes, knives, forks and trays are produced by adopting general equipment such as extrusion molding, plastic uptake or an injection molding unit. The adopted raw materials are rich in source, the raw material cost is low, the process is simple, the production cost is low, and the prepared tableware particle material has high strength, high aging resistance, high antibacterial property and high hydrophobic property and can meet the requirements of high-end catering degradable tableware.

Description

technical field [0001] The invention belongs to the technical field of preparing biodegradable materials, and in particular relates to a completely naturally degradable high-strength tableware particle material and a preparation method thereof. Background technique [0002] Actively preventing and stopping the flood of disposable plastic products has become the consensus of most countries in China and the world. The degradable plastic manufacturing industry has keenly captured this policy trend. According to statistics from Huaan Securities, 36 companies are building or planning to build degradable plastic projects, with a total new capacity of 4.405 million tons. Many of the biggest players in the food and beverage industry have pledged to eliminate plastic cutlery over the past year as they adapt to changes in consumer expectations and legislation. [0003] At present, the main methods of dealing with plastic waste in the world are landfill or incineration. Whether it i...

AI Technical Summary

Problems solved by technology

[0006] Chinese patent CN106084701A discloses a degradable plastic. Although it can achieve good thermoplasticity and fully degradable effect, its strength is low, its hydrophobicity is poor, and its antibacterial performance is not good, so it cannot meet the needs of tableware materials;

[0007] Chinese patent CN107083075A discloses a biodegradable straw disposable material. Although the material can be biodegraded, it still has problems of not high enough strength, not good toughness, easy to break, poor hydrophobicity, and poor antibacterial performance, which cannot meet the needs of high-end places. tableware requirements;

[0008] Chinese patent CN111793251A discloses a starch-based plastic tableware and its preparation method. The plastic tableware has good water resistance, heat resistance and biodegradability, but still has the characteristics of low strength and poor antibacterial performance, so it can only be used as a cheap one-time tableware;

Although the tableware is degradable, and the tableware has certain antibacterial properties by adding nano-silver, the addition of nano-silver itself is very small, and the direct addition of nano-silver causes nano-nanometer silver to not be uniformly dispersed in plastic tableware, and cannot guarantee long-term use. Partial mildew does not occur in the tableware under long-term preservation, and the tableware has low strength and poor hydrophobicity

[0010] With the rapid development of China's economy, people's living standards have improved significantly, and the demand for high-end catering has become more and more vigorous. The visible degradable plastic tableware prepared by the existing technology can only meet the disposable low-end consumption places, and plastic tableware generally has insufficient strength. High, easy to mildew, is also the main factor that it can not meet the needs of high-end tableware

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