JPH058835Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The invention belongs to the field of plant protection and is mainly used for mulch cultivation of ground-growing crops.

(Prior art) It has been a long time since mulch cultivation using films such as polyethylene has been used in the cultivation of underground crops, and various types of films have been devised. There is no film that satisfies all the functions such as heat retention, breathability, water drainage, and preventing weeds from growing. If it is good, breathability,
Conventional films have both advantages and disadvantages, such as poor water drainage and the risk of ripe fruit rotting, and conventional films have had to be maintained manually.

(Problems to be solved by the invention) In order to solve the above-mentioned defects of conventional films, the present invention has developed a multilayer film that has the functions of heat retention, air permeability, and water drainage, and also has the function of preventing weeds from growing. The aim is to provide a cultivation film.

(Means for Solving the Problems) The film for mulch cultivation of the present invention has puncture holes a that are pierced into a required number of small pieces from the center to the periphery of the required virtual hole diameter from the front surface to the back surface of the film. It is constructed by arranging as required.

(Function) The puncture hole is made up of a collection of randomly torn and weak small pieces, which deform into an opening from the front surface to the back surface, and conversely, from the back surface to the front surface, the small pieces become entangled and deform into a closed opening.

(Example) Hereinafter, the present invention will be specifically explained with reference to Examples. The puncture hole a in the present invention is a conical hole with a sharp tip extending from the front surface 2 of the film 1 toward the back surface 3, as shown in FIG. When the hole is punched to a predetermined hole diameter D by the tool 4, and the hole is pulled out as shown in FIG. A small hole 7 is formed in the center of the matted state due to permanent deformation of the tip of each small piece 6, and the puncture hole a
The film 1 of the present invention is composed of the third
As shown in the figure, it is used in the conventional method for mulch cultivation of ground crops such as watermelons. Therefore, according to the puncture hole a, sufficient ventilation is provided by the small hole 7 and the crack 8 in the permanently deformed part of the center, and when water is drained, the peripheral edge 5 of D shown by the imaginary line receives tensile stress and becomes weak. Because it is smooth, it becomes stiff against external forces such as rain from the surface to the back, and water is easily drained.In terms of heat retention, there are few directly exposed areas of the soil, so it has excellent heat retention and prevents weeds from growing. As the small pieces 6 receive external force from the back surface toward the front surface, the small pieces 6 become intertwined with each other and become a hindrance, thereby suppressing the protrusion. Furthermore, the puncture hole a can be made by simply puncturing it with the above-mentioned puncturing means, and in terms of processing costs, it is possible to create a punch hole or perforation, which is conventionally seen, or to heat and harden the periphery of the punch hole. It can be made cheaper than other products with predetermined cuts. The small hole 7 at the center of the puncture hole a was selected to have a diameter (1 mm to 3 mmφ in this example) that would not generate surface tension of water droplets.

(Effects of the invention) As described above, according to the multi-cultivation film of the invention, the puncture holes are formed by randomly dividing small pieces deformed by expansion through the puncture holes from the center to the periphery. From, when using
The small holes created by the cracks and the tips of the small pieces ensure ventilation, and the cracks radiate from the center, so
When laid, the exposed surface of each piece is small as it is folded on the back side, so it has excellent heat retention, and since the pieces are weak, they have good water drainage and are resistant to the growth of weeds. It exerts many effects, such as acting in a closed manner and hindering its growth.

[Brief explanation of drawings]

Fig. 1 is an enlarged cross-sectional view of the film according to the present invention during processing of the puncture hole a, Fig. 2 is an enlarged partial perspective view of the puncture hole a seen from the surface of the film, and Fig. 3 shows the state in which the film is used. Perspective view. In the figure, 1 is the film, 2 is the front side, 3 is the back side, 5
is the periphery, 6 is the small piece, 7 is the small hole, 8 is the fissure, a is the puncture hole, and D is the hole diameter.

Claims (1)

[Scope of utility model registration request] This film for mulch cultivation is provided with a required number of puncture holes a that are pierced into small pieces, extending from the center to the periphery of the required virtual hole diameter from the front surface to the back surface of the film.