Polyphthalamide plastic for manufacturing alloy chopsticks and preparation method thereof

Abstract

The invention discloses a polyphthalamide plastic for manufacturing alloy chopsticks and a preparation method thereof. The polyphthalamide plastic for manufacturing the alloy chopsticks is composed ofa main component and auxiliary components, wherein the main component is composed of, by weight part, 40-70 parts of PPA (polyphthalamide), and the auxiliary components are composed of 20-40 parts ofglass fiber, 20-30 parts of calcium carbonate, 0.5 part of flow modifier, 0.3-0.5 part of coloring agent, and 0.5 part of antioxidant. The PPA is a high-polymer environment-friendly material as wellas a food grade alloy material, so that the alloy chopsticks prepared from the material meeting the national food safety standards can resist 220 DEG C sterilization without deformation or productionof hazardous substances; reinforced by the glass fiber, the polyphthalamide plastic for manufacturing the alloy chopsticks can be hard in texture, high in strength and less prone to fracture and adsorption of microorganisms such as bacteria, thereby meeting the demands of chopsticks on normal application. Meanwhile, the polyphthalamide plastic for manufacturing the alloy chopsticks passes authentication of food contact plastic standards specified by ROHS (Restriction of the Use of Certain Hazardous Substances), GB (Guobiao) and FDA (Food and Drug Administration); the chopsticks prepared from the polyphthalamide plastic for manufacturing the alloy chopsticks have the advantages of being safe and harmless to human body, wear-resistance, mildew-proof and long in service life and meanwhile areeasy to clean simply with warm water without cleaning agent.

Description

technical field [0001] The invention relates to composite materials, in particular to a high-temperature nylon plastic used for making alloy chopsticks, and a preparation method of the high-temperature nylon plastic. Background technique [0002] At present, the chopsticks used in daily life are divided into bamboo and wooden chopsticks, painted paint, metal chopsticks, melamine and PPS plastic chopsticks. [0003] Bamboo and wooden chopsticks are not easy to clean, and they are highly water-absorbent and absorbent. There will be detergent residues, which are easily contaminated by pathogenic microorganisms. Bamboo and wooden chopsticks must be sterilized at high temperature frequently and kept clean to avoid moldy and hairy bamboo and wooden chopsticks, and a batch needs to be replaced in three months; [0004] Substances such as heavy metal lead and organic solvent benzene in the coating of painted chopsticks are carcinogenic. With wear and tear during use, once the pain...

AI Technical Summary

Problems solved by technology

[0005] Metal chopsticks are too heavy, feel bad, and have strong thermal conductivity. When eating overheated food, it is easy to burn the mouth

It is also necessary to check whether it is food-grade stainless steel. If you use inferior stainless steel tableware or use stainless steel tableware in an inappropriate way, it may cause heavy metals to harm human health.

[0006] Melamine plastic chopsticks have a brittle texture and are not resistant to high temperatures. They are easily deformed and melted after being heated, and produce harmful substances to the human body.

PPS (polyphenylene sulfide) plastic chopsticks are hard in texture and bright in color, but PPS will produce substances harmful to human health in the process of extrusion and injection molding, so there is no PPS plastic material certified by food safety standards on the market Chopsticks

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