Fruit fresh-keeping paperboard and preparation method thereof

Abstract

The invention provides a fruit fresh-keeping paperboard and a preparation method thereof. The fruit fresh-keeping paperboard consists of paperboard base paper and fresh-keeping coat which is spread on the surface of the paperboard base paper. The paperboard base paper is mainly made from the waste paper, and the base weight is 90 to 100 g / m2. The fresh-keeping coat mainly comprises the following components in part by weight: 1 part of cristobalite, 0.25 to 1.5 parts of kaolin, 0.005 to 0.01 part of sodium polyacrylate, 0.0003 to 0.0005 part of nisin, 0.0001 to 0.0003 part of natamycin, 0.2 to 0.5 part of oxidized starch and 1.0 to 2.0 parts of water, and the base weight is 5 to 30 g / m2. The waste paper is made into the paperboard base paper through, disintegration, high-consistency slag removal, defibering, low-consistency slag emoval and screening, the cristobalite, kaolin, the sodium polyacrylate, the nisin, the natamycin and water are added into a high-speed dispersion machine to be made into pigment dispersion liquid after being adequately dispersed and filtered, and the oxidized starch and the water are heated to be dissolved to obtain the oxidized starch liquid. The pigment dispersion liquid is mixed with the oxidized starch liquid to obtain the fresh-keeping paint liquid, after being filtered by 180 to 200-mesh sieve, the fresh-keeping paint liquid is spread onto the surface of the paperboard base paper through a spreading machine, and the paperboard base paper with the surface being coated with the fresh-keeping paint is secondarily dried, press finished and decorated to obtain the finished product. The fruit fresh-keeping paperboard has the advantages that the fresh-keeping effect is good, the environment compatibility is good, the fresh-keeping package and the storage and transportation package are integrated, and the continuous mass production can be realized on the papermaking machine.

Description

technical field [0001] The invention relates to a cardboard, in particular to a fruit fresh-keeping cardboard and a preparation method thereof. Background technique [0002] At present, there are mainly two types of fresh-keeping methods: physical method and chemical method. [0003] ①Physical preservation [0004] Physical fresh-keeping methods mainly include: low-temperature storage, controlled atmosphere storage, decompression storage, and electromagnetic radiation storage. Although these physical fresh-keeping methods have better fresh-keeping effects, they generally require special equipment, large investment, complicated operation, high operating costs, and it is very difficult to use them in a large area within the first time. In particular, China has vast rural areas, and the area of ​​orchards is relatively small and scattered. Physical fresh-keeping methods are not suitable for the first-time fresh-keeping of fruits after harvesting. [0005] ②Chemical preservat...

AI Technical Summary

Problems solved by technology

During the use of fresh-keeping paper and paper bags, it is difficult to control the release rate of fresh-keeping components such as sulfur dioxide gas, and because of the complicated production process of fresh-keeping paper, it needs to be bagged and packaged one by one when used, which is inconvenient to operate, time-consuming, and high in cost. Disadvantages, so it is not suitable for large-scale use

In addition, the fresh-keeping paper or paper bag has a large contact area with the fruit, and there is a disadvantage of direct contact between the chemical preservative and the fruit, and it does not belong to green fresh-keeping.

Fruits preserved by chemical methods are difficult to keep fresh immediately after picking, and they still need corrugated boxes or foamed plastic boxes for packaging, transportation and storage, which increases the procedures and costs of freshness preservation and packaging