JPS6218207Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a novel structure of a lid for a mushroom seed culture bottle or a cultivation bottle.

Traditionally, mushrooms have been cultivated using logs such as sawtooth oak and oak, but recently mushroom bed cultivation, which can be cultivated in a short period of time and can be cultivated year-round, has become popular. ing. Mushrooms, especially enoki mushrooms, shimeji mushrooms, nameko mushrooms, hiratake mushrooms, and tamogitake mushrooms, are often grown in bottles, even in fungal bed cultivation.

Currently, paper lids are mainly used for cultivation bottles for enoki mushrooms, shimeji mushrooms, etc.
Some paper lids are also used for bottles for culturing mushroom seeds such as shimeji mushrooms, but these paper lids are made by sandwiching tarpaulin paper with holes of about 8 mm in diameter between thick kraft paper. Then, attach this cover lid 1 to the bottle opening with a rubber band 2 as shown in Fig. 1.
This provides the necessary ventilation for the cultivation bottle.

However, when such paper covers and lids are exposed to steam, the kraft paper becomes weak and easily tears.

2 It is easy for bacteria to invade and produce defective products.

3. Steam (moisture) permeation is unstable and growth is slow.

There are drawbacks such as.

Instead of using conventional tarpaulin paper, the inventors made a hole in the center of a synthetic resin film, and created a porous film surrounding this hole that is as permeable to gas as it is vapor permeable, but impermeable to bacteria and other germs. By using a synthetic resin film pasted to cover the opening and sandwiching it with kraft paper, the drawbacks of conventional paper covers can be removed, making it extremely practical. The inventors have discovered that an advantageous covering lid can be obtained, and have arrived at the present invention.

In this invention, a hole is made in the center of a synthetic resin film such as polyethylene or polypropylene,
This is covered with the above-mentioned microporous film, and both are adhesively fixed to surround the central hole. Such bonding may be performed by any known method, including ultrasonic bonding, thermal bonding, high frequency bonding,
Either adhesive or adhesive may be used.

Since the bottle cover of the present invention has the above-mentioned structure, the necessary ventilation is ensured through the porous film, and (a) it can completely prevent the intrusion of germs.

(b) The synthetic resin film maintains its strength even when exposed to steam.

C. The period of cultivation or culturing can be shortened.

(2) Since it is sandwiched between kraft paper, it fits easily into the mouth of the bottle, the microporous film is protected, and it is economically advantageous.

Very advantageous results can be obtained in practice.

The porous film used in the present invention can be produced by various conventionally known methods, including the following methods. A method in which micropores are created by mixing eluted substances to form a thin film and then eluting the eluted substances from within the membrane. A method in which a liquid that acts as a non-solvent for the polymer is used as a pseudo-solid agent. , A method of creating micropores by removing the solvent from a synthetic resin solution containing synthetic resin, a solvent, and a nonsolvent, and then removing the nonsolvent. A method of sintering polymer particles to make the voids inside the particles into micropores, a method of damaging a part of the film by irradiating it with radiation, and creating micropores by dissolving and removing that part. , a method in which a swellable substance is mixed into a polymer in a swollen state and then dried to create micropores due to volumetric contraction; a method in which a crystalline polymer film is stretched under specific conditions to develop a lamellar structure and then stretched appropriately; A method of generating microvoids by heat setting in a deformed state, a method of making microporous by stretching a film made by adding a finely powdered inorganic substance to a polymer, or This method involves melting and blowing thin fibers of several microns to form a sheet with pores. Porous films used in the present invention include films made of polyolefins such as polyethylene and polypropylene, polycarbonates, polyamides, vinyl polymers, cellulose polymers, fluorine-containing polymers, etc. that have been made porous by various methods. For example, microporous polypropylene film (maximum length
(having slit-like pores of 0.4μ) is suitable. In any case, the pore diameter of these porous films must be large enough to prevent contamination due to invasion of bacteria and other germs. Pore diameter is 0.01~
0.4 μ is particularly preferable, but 0.01 to 1 μ is also acceptable.
If the hole is curved, the purpose can be achieved even with a diameter of about 10μ. It is desirable to use a porous film that is reinforced by being bonded to a porous material such as a nonwoven fabric (for example, a commercially available product is "Zyuraguard 4510").

Next, FIGS. 2 and 3 showing preferred embodiments of the present invention will be described.

In FIG. 2, a hole 4 with a diameter of about 15 mm is made in a synthetic resin film 3 with a thickness of about 40 μm, and a porous film 5 is pasted into the hole 4. As shown in FIG. This is the third
As shown in the figure, it is inserted into kraft paper 6 of about 40 μm in thickness, and used as a bottle cover 1, which is attached to the opening of the bottle with a rubber band 2 in the same manner as shown in FIG. At that time, a mold that fits the opening of the bottle may be attached to the product in advance so that it can be easily attached to the opening of the bottle.

Examples of the present invention are shown below.

Example After filling 100 polypropylene cultivation bottles with a capacity of 1000 c.c. with 500 g of a culture medium prepared by mixing hardwood sawdust and rice bran at a volume ratio of 4:1 and adjusting the moisture content to about 60%, The cover lid of the present invention shown in Figs. 2 and 3 was attached to the opening of the bottle. In Fig. 2, the synthetic resin film used is a polypropylene film with a square shape of 130 mm on a side and a central opening 4 with a diameter of 15 mm. ” [Trademark]), and this is covered with 130mm x 260mm kraft paper (40 mm thick).
μ) is inserted between two folded pieces 6 (Figure 3). This was sterilized at 120°C for 1 hour. After sterilization, the temperature of the cultivation bottle is 30℃.
Inoculate the enoki mushroom inoculum after reaching 18
After culturing at ~20°C for 22 days, the cells were harvested on the 50th day after undergoing the steps of bacterial scraping, suppression, growth, and paper wrapping using conventional methods. Exactly the same operation was performed on cultivation bottles using conventional tarpaulin paper, but
When "Zyuragard 4510" was used, no bacterial contamination was observed, whereas in the case of cultivation bottles made with tarpaulin paper, contamination was observed in 11 out of 100 bottles. At the same time, compared to tarpaulin paper bottles, cultivation bottles using Jyuragard 4510 were able to shorten the cultivation period by an average of 2 days.

[Brief explanation of the drawing]

Fig. 1 is a vertical cross-sectional view of a conventional tarpaulin paper cultivation bottle, Fig. 2 is a plan view of a synthetic resin film according to an embodiment of the present invention, and Fig. 3 is a perspective view showing the state in which it is sandwiched between kraft paper. be. 3: Synthetic resin film, 4: Open pores, 5: Porous film, 6: Kraft paper.

Claims (1)

[Scope of utility model registration request] A synthetic resin film 3 having an opening 4 in the center is covered with a porous film 5 that is permeable to gas but impermeable to bacteria and other germs, and the film is sandwiched between kraft paper 6. Jar covers and lids for mushroom culture and cultivation.