JPS5828522Y2 - Covering material for evergreen broad-leaved trees excluding citrus fruits and tea - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a fibrous covering material for preventing damping-off of evergreen broad-leaved trees other than citrus fruits and tea, such as ubamegashi, mate, shirakashi, and tabby.

In recent years, the evergreen broad-leaved trees mentioned above have been widely used for greening inside factories, as street trees in cities, and as separation strips on highways, but although they are compatible with the environment,
In cold regions such as the Hokuriku, Shinetsu, and Tohoku regions, trees tend to die due to cold wind damage in winter.

It goes without saying that seedlings in particular are more likely to be damaged because they are not yet familiar with the soil and have no resistance to cold damage.

However, the inventors of the present invention have investigated various protective materials to prevent such evergreen broad-leaved trees from dying off, but by covering the trees with a specific knitted fabric made of synthetic fibers, it is possible to completely prevent tree growth while promoting tree growth. It has been found to have the effect of preventing damping-off.

By the way, the types of trees traditionally used, such as Komo and Mushikuchi, are certainly effective in terms of preventing cold and wind damage, but they have low light transmittance and inhibit tree growth.
It is limited to temporary use.

On the other hand, various types of films conventionally used in greenhouses and the like have an excellent heat retention effect, but they lack ventilation and moisture permeability, inhibiting the breathing of the leaves, and also causing the leaves to swell and scorch. They have the disadvantage of easily damaging the leaves of trees, and they also require a lot of auxiliary materials like greenhouses, which poses problems in terms of cost and labor.

In view of these conventional drawbacks, the present invention not only satisfies heat retention, but also has appropriate sunlight permeability, air permeability, and moisture permeability, and is an evergreen plant other than citrus fruits and tea that has excellent construction and cultivation management properties. The present invention provides a covering material for preventing dieback of broad-leaved trees.

In other words, the date of this invention is 30-200 g/rr?
Preferably 50-180g/rr? and the expansion/contraction ratio in at least one direction is 20 factors or more, preferably 25 factors.
~80% and the sunlight transmittance is at least 30 Ll
), preferably 40 or more, is a covering material for evergreen broad-leaved trees other than citrus fruits and tea, which is made of a knitted fabric made of synthetic fibers.

First, the covering material of the present invention is a knitted fabric obtained from various synthetic fibers obtained from synthetic polymers such as polyester, polyamide, polyolefin, or polyacrylic, preferably continuous filament yarn.

Furthermore, such a knitted fabric preferably has a knitted structure in which the damaged part does not fray, such as double denby, ... - futriconte,
Satin tricot, reverse nof, etc. are applied.

Woven fabrics have low elasticity, making it difficult to inexpensively produce fabrics with the elasticity specified in the present invention, and are undesirable because they tend to be easily damaged due to their low elongation, and the damaged areas tend to fray.

Similarly, natural fibers such as cotton and wool are disadvantageous in terms of production cost, and if you try to obtain a light transmittance of 30 or more as specified in the present invention, the fibers will become coarse and it will be difficult to obtain the desired basis weight. It is also not preferred because of its strong water absorption.

However, the fabric has a basis weight of 30 to 200 g/r.
r? , preferably within the range of 50 to 180%/m'; if the basis weight is less than 30 g/d, the sunlight transmittance will increase, but the air permeability will also increase, and a sufficient heat retention effect will not be obtained. In addition, the knitted fabric is easily damaged by tree branches, etc., which impairs workability.In addition, during rain, rain passes through the knitted fabric and wets the leaves, lowering the temperature of the leaf surface and causing freezing at night during extremely cold seasons. So I don't like it.

On the other hand, the basis weight is 200g/W? Exceeding this is not preferable because the sunlight transmittance and air permeability will decrease, the photosynthetic action of the leaves will not be sufficiently carried out, and the leaves will become susceptible to peeling.

In addition, the knitted fabric has a stretch rate (JIS) in at least one direction.
-L-1068) is 20% or more, preferably 25
The elasticity of knitted fabrics must be ~80%, and knitted fabrics with a small expansion/contraction ratio of less than 20% will not only have poor workability, but also have insufficient flexibility when the wind and rain become strong and leaves shake violently. Therefore, it is undesirable because it has disadvantages such as branches breaking, leaves being easily damaged by leaf shedding, bud shearing, etc.

However, if the expansion/contraction ratio is too large (the tension applied to the knitted fabric differs locally, the fabric weight may change easily),
This is not preferable because it becomes difficult to perform construction to provide a constant temperature and breathability.

Furthermore, in the present invention, it is necessary that the sunlight transmittance of the knitted fabric is at least 30%, preferably 40% or more, and 3.
If it is less than 0%, the leaves covered with the knitted fabric will not be sufficiently irradiated with sunlight, and a sufficient effect on the growth of the leaves will not be obtained.

Of course, it is preferable that the sunlight transmittance be as high as possible, but it is not preferable to have a sunlight transmittance of more than about 80 yen due to restrictions on basis weight and to prevent blurring during the daytime light rays from March to April when they become strong.

Here, the light transmittance is determined by irradiating the knitted fabric with 15,000 lux of artificial light corresponding to the average sunlight intensity in winter, and measuring the incident light Io and the amount of transmitted light with a phototube illuminometer (manufactured by Toshiba). and its ratio CI/I.

xlOO)%.

Next, the present invention will be further explained with reference to the drawings.

Fig. 1 shows an example of the covering material of the present invention, using a known tricontre knitting machine with two rugs, a gauge of 28, and 20D nylon thread on the front.

Nylon thread 70D is used for the bank, and the knitting structure is 1.0 to 1.2 on the front. It is a double denby knitted fabric with banks 2.3 to i and o.

FIG. 2 shows a method for applying the knitted fabric of FIG. 1 to evergreen broad-leaved trees, in which a shows an example of a direct burr and b shows an example of an indirect burr.

The covering material of the present invention is first used to prevent so-called cold wind damage from December to February, and has the role of preventing dehydration caused by direct contact of tree leaves with cold, dry air at low temperatures.

Next, in spring, when new buds appear, it is intended to promote growth by protecting the new buds and young leaves from frost and keeping them warm, and is usually applied from March to April.

Therefore, the coating material of the present invention not only does not allow frost to pass through it, but also has the characteristic of actively retaining heat.

The covering material of the present invention has the advantage of being moderately elastic, easy to work with, and easy to store, as well as having no tree branches or leaves to store, and because it moves with the tree branches due to the wind, it does not rub the buds.

[Brief explanation of drawings]

FIG. 1 is a partial explanatory view showing an example of the covering material for evergreen broad-leaved trees other than citrus fruits and tea according to the present invention. FIG. 2 shows the method of applying the covering material, where a shows an example of direct application and b shows an example of indirect application. In the diagram, 1...Knitted fabric, 2...Hardwood, 3
...Knitted fabric stretched over the frame.

Claims (1)

[Scope of utility model registration request] The date is 30-200g/? ? Z2, expansion and contraction ratio in at least one direction is 20% or more and light transmittance is 30%
A covering material for evergreen broad-leaved trees other than citrus fruits and tea, consisting of the above synthetic fiber knitted fabric.