CN-122011696-A - Supercritical extrusion antibacterial PET foam and preparation method thereof

Abstract

The invention relates to the technical field of high polymer materials, in particular to a supercritical extrusion antibacterial PET foam and a preparation method thereof, wherein the supercritical extrusion antibacterial PET foam comprises PET resin, an antibacterial agent, a foaming agent and an auxiliary agent, the method comprises the steps of drying the PET resin, premixing the antibacterial agent, the foaming agent and the auxiliary agent, adding the dried PET resin, the premixed antibacterial agent, the foaming agent and the auxiliary agent into a double-screw extruder, carrying out melt blending at the temperature of 250-300 ℃ to obtain an antibacterial PET blend, extruding and granulating the antibacterial PET blend to obtain antibacterial PET particles, carrying out extrusion foaming on the antibacterial PET particles, carrying out heating foaming at the temperature of 150-200 ℃ to form a foam blank, and carrying out curing treatment and drying treatment on the foam blank to obtain the antibacterial PET foam, so that the growth and reproduction of various common bacteria can be effectively inhibited, and the strict requirements of the antibacterial performance of materials in a plurality of fields are met.

Inventors

• ZHANG JIALONG
• HUANG HUALIANG
• DONG YIBO

Assignees

• 江苏越科新材料有限公司
• 南京化纤股份有限公司

Dates

Publication Date

20260512

Application Date

20260302

Claims (6)

1. 1. A supercritical extrusion antibacterial PET foam is characterized in that, Comprises 100 parts of PET resin, 8-15 parts of antibacterial agent, 2-4 parts of foaming agent and 0.5-1.5 parts of auxiliary agent.
2. 2. The supercritical extrusion antibacterial PET foam according to claim 1, wherein, The antibacterial agent is a composite antibacterial agent, wherein the antibacterial agent consists of an inorganic antibacterial agent and an organic antibacterial agent, and the mass ratio of the inorganic antibacterial agent to the organic antibacterial agent is 1:1-3:1.
3. 3. The supercritical extrusion antibacterial PET foam according to claim 2, wherein, The inorganic antibacterial agent is one or two of silver ion antibacterial agent and titanium dioxide antibacterial agent.
4. 4. The supercritical extrusion antibacterial PET foam according to claim 3, wherein, The organic antibacterial agent is one or two of quaternary ammonium salt antibacterial agents and imidazole antibacterial agents.
5. 5. The supercritical extrusion antibacterial PET foam according to claim 4 wherein, The foaming agent is one or two of chemical foaming agent and physical foaming agent, wherein the chemical foaming agent is azodicarbonamide and sodium bicarbonate, and the physical foaming agent is carbon dioxide and nitrogen.
6. 6. A method for preparing the supercritical extrusion antibacterial PET foam according to claim 1, comprising the following steps: Drying the PET resin to remove water in the PET resin; premixing an antibacterial agent, a foaming agent and an auxiliary agent; adding the dried PET resin, a premixed antibacterial agent, a foaming agent and an auxiliary agent into a double-screw extruder, and carrying out melt blending at the temperature of 250-300 ℃ to obtain an antibacterial PET blend; Extruding and granulating the antibacterial PET blend to obtain antibacterial PET particles; placing the antibacterial PET particles into extrusion foaming, and heating and foaming at the temperature of 150-200 ℃ to form a foam blank; And (3) curing and drying the foam blank to obtain the antibacterial PET foam.

Description

Supercritical extrusion antibacterial PET foam and preparation method thereof Technical Field The invention relates to the technical field of high polymer materials, in particular to a supercritical extrusion antibacterial PET foam and a preparation method thereof. Background PET foams are widely used in the fields of construction, furniture, automobiles, etc., because of their excellent physical and chemical properties, such as light weight, high strength, chemical resistance, heat insulation, sound insulation, etc. However, the traditional PET foam preparation method has some limitations such as foaming agent residue, nonuniform cell structure, high cost and the like, and the supercritical fluid technology has the advantages of no toxicity, no pollution, uniform foaming and the like as a novel foaming technology, provides a novel way for preparing the high-performance PET foam, and simultaneously meets the continuous improvement of the requirements of people on sanitation and health and the strict requirements on the antibacterial performance of materials in specific application scenes. However, the existing PET foam materials are limited in various fields due to the lack of antibacterial function, and cannot meet the strict requirements of the fields closely related to daily life such as buildings, furniture, automobiles and the like on the antibacterial performance of the materials. Disclosure of Invention The invention aims to provide a supercritical extrusion antibacterial PET foam and a preparation method thereof, and aims to solve the technical problem that the prior PET foam material is limited in a plurality of fields due to lack of antibacterial function and cannot meet strict requirements on antibacterial performance of materials in fields closely related to daily life such as buildings, furniture, automobiles and the like. The invention provides a supercritical extrusion antibacterial PET foam which comprises 100 parts of PET resin, 8-15 parts of antibacterial agent, 2-4 parts of foaming agent and 0.5-1.5 parts of auxiliary agent. The antibacterial agent is a composite antibacterial agent, wherein the antibacterial agent consists of an inorganic antibacterial agent and an organic antibacterial agent, and the mass ratio of the inorganic antibacterial agent to the organic antibacterial agent is 1:1-3:1. Wherein the inorganic antibacterial agent is one or two of silver ion antibacterial agent and titanium dioxide antibacterial agent. Wherein the organic antibacterial agent is one or two of quaternary ammonium salt antibacterial agent and imidazole antibacterial agent. Wherein the foaming agent is one or a mixture of two of a chemical foaming agent and a physical foaming agent, the chemical foaming agent is azodicarbonamide and sodium bicarbonate, and the physical foaming agent is carbon dioxide and nitrogen. The invention also provides a preparation method of the supercritical extrusion antibacterial PET foam, which comprises the following steps: Drying the PET resin to remove water in the PET resin; premixing an antibacterial agent, a foaming agent and an auxiliary agent; adding the dried PET resin, a premixed antibacterial agent, a foaming agent and an auxiliary agent into a double-screw extruder, and carrying out melt blending at the temperature of 250-300 ℃ to obtain an antibacterial PET blend; Extruding and granulating the antibacterial PET blend to obtain antibacterial PET particles; placing the antibacterial PET particles into extrusion foaming, and heating and foaming at the temperature of 150-200 ℃ to form a foam blank; And (3) curing and drying the foam blank to obtain the antibacterial PET foam. The invention discloses a supercritical extrusion antibacterial PET foam and a preparation method thereof, wherein 100 parts of PET resin, 8-15 parts of antibacterial agent, 2-4 parts of foaming agent and 0.5-1.5 parts of auxiliary agent are adopted, the PET resin is subjected to drying treatment to remove moisture in the PET resin, the antibacterial agent, the foaming agent and the auxiliary agent are premixed, the dried PET resin, the premixed antibacterial agent, the foaming agent and the auxiliary agent are added into a double-screw extruder, melt blending is carried out at the temperature of 250-300 ℃ to obtain an antibacterial PET blend, the antibacterial PET blend is extruded and granulated to obtain antibacterial PET particles, the antibacterial PET particles are put into extrusion foaming, heating foaming is carried out at the temperature of 150-200 ℃ to form a foam blank, the foam blank is subjected to curing treatment and drying treatment to obtain the antibacterial PET foam, and the antibacterial PET foam can effectively inhibit the growth of microorganisms such as bacteria and mold, reduce the propagation of bacteria, provide a more sanitary and healthy environment for people, and help to reduce the risk of infection, and improve the requirements of public safety and safety, and the