Culture medium for packaging material

Abstract

A raw material formula of the culture medium for the packaging material comprises the following raw materials in parts by weight: 40-75 parts of saw dust, 20-45 parts of rice bran and 5-15 parts of bast fiber. The bast fiber in the culture medium has excellent nutrition supply and physical structures, and after strains are cultured on the bast fiber, the packaging material prepared from the culture medium and mycelia on the culture medium has certain tensile strength.

Description

Technical Field

[0001] The invention relates to a culture medium for packaging materials, belonging to the technical field of packaging materials. Background Art

[0002] As one of the five major packaging materials, plastic has been widely used in packaging due to its wide range of excellent physical and chemical properties such as light weight and high performance. It has replaced traditional packaging materials in many occasions and become the protagonist of packaging. Plastic packaging accounts for about 30% of the entire packaging, and packaging accounts for about 3% of the global annual total of nearly 100 million tons of plastic. As an important part of modern materials, it can be said that people cannot live without plastic for a day. Many products cannot be launched without plastic. However, plastic packaging belongs to the "short-life" application category of plastic. There are only two ways for plastic packaging after use: becoming plastic garbage that is thrown away at will, or becoming urban solid waste. Either way, it will harm the environment. In addition, due to the special environmental stability of plastic, it will not decompose or decompose very slowly in the environment for a long time, decades or even hundreds of years, so the harm to the environment is very long-lasting. With the increasing understanding of human beings on environmental pollution and ecological protection, the environmental pollution problem of packaging waste is also increasingly concerned.

[0003] At present, traditional plastic packaging materials have become one of the main sources of environmental pollution due to their difficulty in degradation. With the increasing global attention to environmental issues, it is particularly important to develop a degradable and environmentally friendly alternative material. Mycelium materials have gradually become a potential alternative in the packaging field because of their renewable, degradable and environmentally friendly characteristics. Mycelium can grow rapidly in a suitable environment and combine with the matrix to form a material with a certain strength and structure, which can be used to make packaging products.

[0004] In the process of cultivating microorganisms, the selection and preparation of culture medium is very important. In the prior art, there are many kinds of culture medium used for mycelium cultivation, but their effects and costs have certain limitations. Summary of the invention

[0005] The present invention aims to provide a culture medium for packaging materials.

[0006] To achieve the above purpose and other related purposes, the technical solution provided by the present invention is: a culture medium raw material formula for packaging materials includes the following raw materials in parts by weight: 40-75 parts by weight of sawdust, 20-45 parts by weight of rice bran, and 5-15 parts by weight of hemp fiber.

[0007] The preferred technical solution is that the hemp fibers are fibers stripped from at least one of ramie, flax, jute, kenaf, sisal and apocynum.

[0008] The preferred technical solution is that the length of the sawdust is 1 to 3 mm.

[0009] The preferred technical solution is that the length of the hemp fibers is 10-30 cm.

[0010] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art: The hemp fibers in the culture medium of the present invention have excellent nutrition supply and physical structure. When the strain is cultured thereon, the packaging material prepared together with the culture medium and the mycelium thereon has a certain tensile strength. DETAILED DESCRIPTION

[0011] The following specific embodiments illustrate the implementation of the present invention, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in the embodiments. Unless otherwise specified, the experimental materials used in the following embodiments were purchased from conventional biochemical reagent stores.

[0012] Example 1: 50 parts by weight of sawdust, 32 parts by weight of rice bran, and 8 parts by weight of hemp plants are used for culture, and nitrogen and carbon sources and organic elements required by edible fungi are added to obtain a matrix after mixing, and the edible fungi can be inoculated after sterilization. The following technical solutions can be used: Matrix pretreatment: sterilizing the prepared matrix to obtain a sterilized matrix; Inoculating edible fungi strains: in a sterile environment, cool the sterilized substrate and then inoculate the edible fungi strains; Mycelium culture: Place the inoculated substrate in a constant temperature and humidity culture room for 10-20 days; Molding and processing: The cultured mycelium and the substrate are placed together in a pre-designed mold for molding; Drying and curing: The formed mycelium material is dried in a drying device at 40°C-60°C until the moisture content drops below 10%; the dried mycelium material is surface treated.

[0013] A preferred embodiment is that the carbon source and nitrogen source are soybean meal.

[0014] A preferred embodiment is that the inorganic salt is potassium sulfate.

[0015] The preferred embodiment is as follows: the sterilization process conditions are: temperature of 120° C. and time of 15 minutes.

[0016] A preferred embodiment is: the culture medium formula is: the edible fungus species is Pleurotus ostreatus.

[0017] The preferred embodiment is that the culture conditions are: temperature of 22°C and relative humidity of 60%.

[0018] Example 2: In another specific experiment, a combination of 55 parts by weight of sawdust, 28 parts by weight of rice bran, and 10 parts by weight of hemp plants was used for cultivation, and the growth was good. Other conditions were the same as in Example 1.

[0019] The above description is only used to explain the preferred embodiments of the present invention, and is not intended to limit the present invention in any form. Therefore, any modifications or changes made to the present invention under the same inventive spirit should still be included in the scope of protection intended by the present invention.

Claims

1. A culture medium for packaging materials, characterized in that: The raw material formula comprises the following raw materials in parts by weight: 40-75 parts by weight of sawdust, 20-45 parts by weight of rice bran and 5-15 parts by weight of hemp fiber.

2. The culture medium for packaging materials according to claim 1, characterized in that: The hemp fibers are fibers stripped from at least one of ramie, flax, jute, kenaf, sisal and apocynum.

3. The culture medium for packaging materials according to claim 1, characterized in that: The length of the sawdust is 1 to 3 mm.

4. The culture medium for packaging materials according to claim 1, characterized in that: The length of the hemp fibers is 10-30 cm.