Coffee residue polymerized degradable food contact composition and preparation method thereof

Abstract

The invention discloses a coffee residue polymerized degradable food contact composition and a preparation method thereof. The composition is prepared from, by mass, 28-70% of polybutylene succinate,15-30% of polyadipic acid / polybutylene terephthalate, 3-10% of polylactic acid, 10-25% of coffee residues, 1.5-6% of talcum powder and 0.5-1% of an aluminate coupling agent, wherein the sum of mass percentages is 100%. Compared with existing similar food contact material products on the market, the composition which meets the food contact requirement has advantages of high degradability, safety, nontoxicity and high practicality.

Description

technical field [0001] The invention relates to a food contact polymer material, in particular to a degradable food contact composition polymerized with coffee grounds and a preparation method thereof. Background technique [0002] Coffee is a commodity with a global trading volume second only to crude oil. In 2016, the global coffee production was about 930 million tons. China’s coffee consumption accounted for a small proportion, with an average annual average of about 40,000 tons, but it increased steadily at a rate of 15% per year. The prospects are promising. The freshly ground coffee, instant coffee and other coffee drinks we often drink are brewed after the coffee beans are ground into granules or powder, and 70% of the original mass of "coffee grounds" will remain after extraction. According to the existing practice, these coffee grounds will be treated as kitchen waste landfill or incineration. According to the incomplete survey and statistics in the early stage, i...

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Problems solved by technology

[0004] Through investigation and research, it is found that the existing polymer materials in the market have different uses. During the development process, polymerization and modification of several different materials are usually used to ensure the final use effect. The proportion of materials that can be used for food contact is very small. Manufacturers Considering the appearance design, the final product often relies on color masterbatches and toners of various colors to color, resulting in various tests exceeding the standard and food contact inspection failing

Moreover, the vast majority of plastic packaging and food containers are not biodegradable. According to the "Report on the Development Status and Trend of Green Packaging in China's Express Delivery Sector" issued by the State Post Bureau, in 2016 a total of about 18 billion express waybills and 3 billion express waybills were consumed. Woven bags, 7 billion plastic bags, and 3 billion envelopes. According to statistics from relevant departments, by 2020, the total amount of express delivery in the country will reach 50 billion pieces, including about 20 billion plastic bags and 7 billion bubble bags. more pressure

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