JPS62107726A - Air permeable material for culture of mushrooms - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a breathable material suitable for use in cultivating so-called mushrooms such as maitake, shiitake, nameko, oyster mushroom, enokidake, and wood ear fungus.

[Conventional technology]

Recently, culturing mushrooms in plastic bottles or bags has become widely used.

These are carried out by placing a medium such as sawdust in a plastic bottle or bag, sterilizing it with steam in an autoclave, etc., and then inoculating mushroom fungi into the medium and culturing it.

In this case, an opening may be provided in the bottle or bag to supply the air necessary for culturing mushroom fungi, or a porous plastic film with small holes perforated in a variety of ways may be provided as part of the container body. ing.

This opening is usually fitted with a cotton plug, but if it is sealed too tightly, the air supply will be insufficient, and if it is too tightly sealed, bacteria such as green mold can easily enter, so it requires great skill and time. Met.

On the other hand, when a porous film is used, it is considerably better than when a cotton plug is used, but requires a large number of small pores to maintain air permeability.

Not only does it have problems in preventing the invasion of germs, but it also has the disadvantage of being expensive.

[Problems to be solved by the present invention]

The present invention overcomes the dilemma of maintaining air permeability and preventing the intrusion of bacteria, which the conventional technology has, and prevents the intrusion of bacteria while maintaining sufficient air permeability, and also prevents water evaporation from the medium to an appropriate level. Presser foot.

The purpose of the present invention is to provide an inexpensive breathable material for culturing mushrooms that allows mushroom fungi to grow quickly.

[Means for solving problems]

In order to achieve this objective, the present inventor has conducted intensive research and found that the pH is 7 to 111 and the basis weight is 30 to 1201//m'.
It has been found that a water-repellent paper with an air permeability of 5 to 50 seconds according to the method specified in JIS P 8117 is suitable.

Generally, first-order properties are required for aeration materials for mushroom culture.

■Do not be damaged during steam sterilization using autoclaves, etc.

■It may be damaged if it comes into contact with water during culture.

Do not allow water to pass through.

■Prevent the invasion of bacteria during culture and be able to supply sufficient air necessary for culture.

■Be able to moderately suppress moisture evaporation in the culture medium.

The breathable material according to the invention has all of these properties.

In other words, the material according to the present invention has an air permeability in the range of 5 to 50 seconds and can be prepared by the method specified in JISP-8117 to prevent the invasion of germs (the material can sufficiently supply the air necessary for culture). Moreover, the water evaporation of the medium can be suppressed to a moderate level.If the air permeability is lower than this range, bacteria will easily invade and the water evaporation of the medium will be excessive.On the other hand, if the air permeability is higher than this range, The growth of mushroom fungi is suppressed because the air necessary for culture cannot be supplied.

Furthermore, the air permeable material of the present invention has an angle of 7 to 11 degrees, preferably 7 to 9 degrees. Within this range, the growth of mushroom fungi can be prevented, so even if mushroom fungi adhere to the breathable material for some reason during inoculation or culture, the fungi will grow and grow in the eyes of the breathable material. This prevents bacteria from entering the interior through the mushroom fungi that have grown on the breathable material.

The material of the present invention is preferably 3011/m or more, most preferably 3
A basis weight of 0 to 120.9/m' is required. Water resistant for at least 30 seconds using the method specified in JISP-8122 to prevent damage or water intrusion into the interior during steam sterilization using autoclaves, etc. or contact with water that may occur during culture. The material of the present invention preferably has a pulp, a sizing agent, and a paper strength of 1°.

It can be produced by suitably combining known papermaking raw materials such as reinforcing agents, additives, fixing agents, etc., and performing impregnation and coating during or after papermaking.

In this case, the required air permeability is N material/L of the valve used.
It can be obtained by appropriately selecting the material ratio, beating degree, filler, amount of internal addition of papermaking materials such as starch, press pressure per grammage during paper making, amount of impregnated resin, etc., and amount of coating.

In addition, the necessary pH value can be adjusted to 1 by adding an appropriate basic substance to the paper stock, impregnating agent, or coating liquid to impart water resistance.
A water resistance imparting agent such as a sizing agent, a water repellent, a wet paper strength enhancer, and a synthetic resin emulsion is added to the paper stock, or these are impregnated or coated.

Examples of basic substances used for the adjustment include alkali metal salts such as disodium phosphate, dipotassium phosphate, calcium carbonate, and borax.

Alkali metal oxides such as calcium oxide and magnesium oxide, alkali metal hydroxides such as calcium hydroxide and magnesium hydroxide, ammonium salts such as ammonium acetate and ammonium oxalate, and amines such as ethanolamine and triethanolamine. or mixtures thereof are suitable.

Next, examples will illustrate the manufacturing mode of the material according to the present invention.

(Example) Pulp 1 consisting of NBK P 30 units and LBKP 70 units
00 parts was beaten to a Canadian standard P water content (C8F) of 350 ml, and then to this pulp slurry, 1.0 part of polyamide polyamine epichlorohydrin resin was added to the pulp (1.0 parts per pulp).
solid content), alkyl ketene dimer 0.7 part (solid content)
was added. Next, this paper stock was made into paper using a fourdrinier machine, and 9.0 parts of polyacrylamide resin (
(concentration 10%), styrene maleic acid surface sizing agent 3
．． 4 parts (concentration 30%), borax 0.6 part, paraffin wax emulsion 1.0 part (A degree 30%), water 86
One surface size was applied with a solution consisting of 1 part. The obtained breathable material has a basis weight of 709/m', an air permeability of 35 seconds according to JISP 8117 method, a pH value of 8 degrees according to JISP 8133 method, a size degree of 45 seconds according to JISP 8122 method, no pinholes, and is suitable for mushrooms. It was suitable as a breathable material for culture.

As shown by A in Figure 1, the material according to the present invention is used as a ventilation part of a conventional culture container such as a plastic bottle or bag by removing a part of the container body and attaching it to that part by thermal bonding or adhesive. used as

However, the most characteristic method of using the material according to the present invention is that it can be used in the culture medium contacting part of a culture container, as shown by B in Figure 1. This is completely unthinkable with conventional breathable materials, but as mentioned above, even if fungi adhere to the material of the present invention, the fungi will grow and block the eyes. This is because it has a characteristic that other breathable materials do not have, such as no air permeability.As a result, in the conventional method, the entire culture medium could not be used effectively due to insufficient ventilation in the lower part of the culture medium, but the present invention By using the breathable material in the part of the container that comes in contact with the medium, the permeability of the entire medium improves, and the entire medium can be used for the growth of mushroom fungi, dramatically increasing the yield of the desired mushrooms. I can do it.

[Brief explanation of drawings]

The figure is a schematic diagram showing how the breathable material according to the present invention is used. l...culture container body, 2...breathable material. 3...Medium.

Claims (1)

[Claims] A breathable material for culturing mushrooms characterized by being made of water-repellent paper having a pH of 7 to 11, a basis weight of 30 g/m^2 or more, and an air permeability of 5 to 50 seconds using an air permeability tester. .