JPS5916725B2 - Method of manufacturing lawn seed mats - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention involves holding lawn seeds inside a mat made mainly of pulp, spreading the mat on the ground, and watering the mat itself so that it retains water, and further acts as a culture medium. The present invention relates to a method for producing a mat containing lawn seeds, in which the seeds of the lawn are germinated and grown by adhering to the ground.

Regarding the production of this type of mat in the past, for example, the technique shown in Japanese Patent Publication No. 53-27169 is known, but
In this case, the seeds are scattered onto a semi-formed web in which about half of the loosened fibers have been deposited, and the retention effect of the seeds by the fibers themselves is insufficient, and after the web is formed, Since reinforcing nets are bonded together and there is no bonding between the two through the entanglement of fibers, there are drawbacks such as insufficient bonding.

The present invention has been made with attention to the above-mentioned points, and its purpose is to continuously blow and deposit a mixture of defibrated pulp and lawn seeds on the transition belt, thereby dissolving the transition belt. To provide a method for producing a mat containing lawn seeds, which enables the rapid production of a mat body supporting lawn seeds between entangled pulp fibers by forming a pulp web layer thereon.

Another object of the present invention is to use a net as the transition belt, form the pulp web layer on the net, and entangle the pulp fibers with the net to strengthen the bond between the two. To provide a method for manufacturing a lawn seed-containing mat by which the same can be manufactured quickly.

Furthermore, another object of the present invention is that the above-mentioned production process is carried out in a dry manner, so that the seeds are not subjected to harsh conditions such as large amounts of water or heat for drying, and therefore, the seeds are not damaged. To provide a method for producing a mat containing lawn seeds, which enables the production of a mat containing grass seeds.

Furthermore, another object of the present invention is that the formed pulp web is porous and has good air permeability, and also has good water absorption and
To provide a method for producing a mat containing grass seeds, which has good water retention and is the best medium for seed growth.

Examples of the method for manufacturing a lawn seed-containing mat of the present invention will be described below.

In FIG. 1, a rolled pulp 1 is supplied from a supply device 2 to a crusher 3 and crushed, and then the crushed pulp 1' is blown to a defibrator 4 by a blowing fan.

Here, as the fibers pass through the narrow gap between the rotor 4a and stator 4b of the defibrator 4 together with a large amount of air, they are subjected to strong impact and shearing action by the rotor 4a rotating at high speed, and the fibers are defibrated into single fibers. Ru.

The defibrated fibers 1'' are sent from a pipe 5 to a web forming device 6 by an air method using a blowing fan.

In the web forming device 6, the pulp fibers introduced from the inlet 6a are stirred by the rotor 6b and sieved by the lower screen 6c to be further made into single fibers, and the pulp single fibers 1'' are passed through the lower suction box 7. It is attracted onto the net 8 and becomes entangled in the net 8, covering the eyes.

On the other hand, the lawn seeds 9 are introduced into the web forming device 6 from the seed supply device 10 through the inlet 6d, and the small seeds 9 are made into pulp fibers due to the positional relationship with the pulp fiber inlet 6a, particle size, and specific gravity. Pulp single fiber 1 arrived on net 8 a little later than fiber 1〃', mixed into pulp single fiber 1'' without falling through, and fell on top of it even later.
'' is deposited to form a pulp layer, and as a result, a seed-containing pulp web 11 is formed on the net B in which the lawn seeds 9 have almost entered the middle layer.

After pressing the web 11 to a suitable thickness with the density adjustment roll 12, the hydrophilic adhesive 13 is sprayed from the spray device 14 and sucked from the back side by the suction box 15 to form the web 11.
The adhesive is then dried using a hot air dryer 16 to bond and integrate the pulp fibers with the net, pulp fibers, and lawn seeds interposed, and then rolled as a continuous mat 17. This enables high-speed production of 120 mΔi.

In the above embodiment, the web is formed on a net serving as a transition belt, so that the pulp fibers are entwined with the net and the net is integrated as a reinforcing band. It is also possible to form the web on a transition belt, such as a conventional endless cloth, without using
A reinforcing band may be provided on the mat material manufactured in this way in a subsequent step, if necessary.

Example 1, mat composition net (polypropylene) 101/m2 mat pulp (NBKP) 60 g/m2 total basis weight lawn seeds 10 g/m2 90 adhesive g/m2 (vinyl acetate emulsion) 20. ! i'/772,22,
Manufacturing conditions Manufacturing width 2500yym Manufacturing speed 120 m/*n3, Mat physical properties Mat thickness 5711IIl Tensile strength
30Ky/10cm〃Elongation
10 water absorption amount 1500 g/m2 Since the present invention is constructed as described above, it is possible to mix lawn seeds into a pulp web in one step, and the seeds in the web are unique to pulp fibers. Because it is a dry process, it is possible to form a pulp web without damaging the seeds without exposing them to harsh conditions such as large amounts of water or heat for drying. The formed pulp web is porous and has good air permeability, and also has good water absorption and water retention properties, making it the best medium for the germination of lawn seeds.

In addition, when the transition zone for forming a pulp web is formed on a net that is sequentially supplied, the pulp fibers become entangled with the net and strengthen the bond between the two, and when a reinforcing band such as a net is attached again. It has the advantage that the manufacturing process can be greatly simplified compared to the conventional method.

In particular, in the present invention, since a mixture of defibrated pulp, which is a short fiber, and grass seeds is blown, it is possible to immediately form a pulp web in which grass seeds are incorporated due to the specific gravity of the two. Since the lawn seeds are located in a relatively small porous space formed between the entanglements of short pulp fibers, the formation of a pulp web layer immediately holds the lawn seeds while preventing them from falling off. It has the feature of being able to

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of a manufacturing apparatus according to the present invention, and FIG. 2 is a longitudinal sectional view of an embodiment of the mat. 1"'...Fibrated pulp, 6...Pulp supply device, 8...Transition belt (net), 9.
... Lawn seeds, 11 ... Pulp web,
13...adhesive, 16...dryer, 1
7...Matt.

Claims (1)

[Claims] 1. A mixture of defibrated pulp and lawn seeds is continuously blown and deposited on a transition belt, and the lawn seeds are supported between tangles of pulp fibers on the transition belt. A method for manufacturing a lawn seed mat by a dry method in which a pulp web layer is continuously formed, and then an adhesive is spread and dried. 2. Continuously blow and deposit a mixture of defibrated pulp and lawn seeds on a continuously supplied transition net to form a pulp web layer on the net that supports the lawn seeds inside. A dry method for producing a grass seed-containing mat comprising the steps of: intertwining the pulp fibers with the net; then spraying an adhesive and drying the mat.