KR101580032B1 - Biodegradable stake for fixing lawn - Google Patents

Abstract

The present invention relates to a biodegradable turf fixing pile, comprising: a body; A header formed at an upper end of the body and having an extension plate extending in a plurality of different directions from a center; And a fixing part formed at a lower end of the body, wherein the body, the header, and the fixing part are made of at least one of polybutylene adipate-co-terephthalate or polycaprolactone And a biodegradable synthetic resin containing one of the starch and the organic clay.
The biodegradable turf fixing pile according to the present invention has excellent supporting force for allowing the planted turf to grow on the soil, and can be naturally biodegraded and removed.

Description

{BIODEGRADABLE STAKE FOR FIXING LAWN}

The present invention relates to a pile for fixing a biodegradable lawn, and more particularly to a biodegradable lawn pile supporting biodegradable grass supported on the ground.

Grass is a perennial herbaceous plant that is resistant to frequent cuttings and pressures and is highly regenerative, among the giant plants that cover the surface of the earth.

The grass is not only capable of preventing soil erosion, temporary retention of rainwater and groundwater replenishment, dispersion of solar radiation, reduction of reflectance of sunlight, decomposition of organic chemicals, air pollution mitigation, noise reduction, fire prevention, Provide landscape to improve the quality of life and promote the property value of landscape elements.

Despite the various functions of the lawn, the green space is being reduced due to the development and diffusion of the city. Recently, efforts have been made to improve the soil by planting natural grasses in parks, green spaces, playgrounds,

The method of applying grass to soil is classified into seed sowing method and paddy planting method. Seed sowing method has low cost of composition but requires management until use. On the other hand, the method of planting the paddy field is expensive, but the post management cost is low, and the paddy planting method can be used one to two months after the planting.

When the turf is planted, the turf should be planted with a high level of ground coverage and high density, and even if a certain period of time has elapsed after the planting of the turf, the planted turf should be maintained in a planted place and the turf should be firmly fixed to the ground .

As shown in FIG. 1, the fastening means used to fix the turf may include a long body 10 and a sharp point 20 at the bottom of the body 10, A circular header 30 is formed on the upper part of the pillar-like shape to have a shape similar to a nail.

Such a conventional grass fastening means has a circular plate shape even if there is no header or a header, so that the fastening means can not enter into the ground or fix the grass firmly.

In addition, since the conventional grass fixing means is made of a metal such as iron, the grass is corroded to contaminate the soil, thereby hindering the growth of the grass, and the force of supporting the grass gradually decreases over time have.

Therefore, it is required to develop a lawn-fixing means capable of supporting grass so that the lawn can sufficiently live on the soil after lawn planting, and then decomposing and disappearing in the soil.

It is therefore an object of the present invention to provide an eco-friendly biodegradable grass-fixing pile which can be biodegraded by microorganisms in the soil after inserting the soil after the planting of the grass. have.

Another object of the present invention is to provide a pile for fixing lawns which is formed of a biodegradable resin composition excellent in modulus, tensile strength and elongation.

It is also an object of the present invention to provide a pile for fixing lawns which can support grass so that it can be sufficiently deposited in soil after planting.

According to an aspect of the present invention, there is provided a pile for fixing a biodegradable lawn, comprising: a body; A header formed at an upper end of the body and having an extension plate extending in a plurality of different directions from a center; And a fixing part formed at a lower end of the body, wherein the body, the header and the fixing part are made of at least one of polybutylene adipate-co-terephthalate or polycaprolactone, A biodegradable synthetic polymer containing any one of the above, starch and an organic clay.

The biodegradable resin composition may contain 40 to 99% by weight of the biodegradable synthetic polymer and 1 to 60% by weight of the starch based on 100% by weight of the total of the biodegradable synthetic polymer and the starch.

The biodegradable resin composition may contain 1 to 10 parts by weight of the organic clay relative to 100 parts by weight of the sum of the biodegradable synthetic polymer and the starch.

The starch may be at least one of potato starch or corn starch.

Wherein the organic clay is at least one clay of montmorillonite or chlorite is at least one organic molecule selected from the group consisting of ammonium, phosphonium, maliate, succinate, acrylate, benzylic hydrosene and oxazoline Can be organicized.

The clay may have an average length of 50 nm to 100 탆.

The biodegradable resin composition may be in the form of an intercalation compound in which the biodegradable synthetic polymer and the starch are interposed between the layers of the organic clay.

The width of the extension plate provided in the header may increase as the distance from the center increases.

The fixing portion may include an inclined portion formed to have a diameter larger than the diameter of the body and have a smaller diameter as it goes downward.

The inclined portion may be formed on the outer surface of the fixing portion so as to have a multi-step inclined surface.

The pest for grass fixing according to the present invention is biodegraded in a period of 1 to 2 months in which grass is finally transferred by water, methane or carbon dioxide by the microorganisms in the soil after the grass is transferred, It can grow to high ground coverage.

In addition, unlike conventional piles for lawn fixation of metallic materials, it does not cause environmental pollution because it does not cause corrosion and is eco-friendly.

Further, after the lawn is planted, it is economical since it does not require construction for removing the grass fixing pile separately.

Further, by optimizing the kind and content of the components of the biodegradable resin composition forming the pile for lawn fixation, it is possible to easily form the pile as a grass fixing pile with excellent modulus, tensile strength and elongation, .

In addition, by providing extension plates extending in a plurality of different directions in the header of the grass fixing pile, the grass can be supported sufficiently while being put in the planted place.

The effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned can be clearly understood by those skilled in the art from the description of the claims.

FIG. 1 is a view showing a conventional lawn-fixing pile according to an embodiment of the present invention.
2 is a view showing another embodiment of a conventional grass fixing pile
3 is a view showing a pile for grass fixing according to an embodiment of the present invention.
4 is a view showing a pile for grass fixing according to another embodiment of the present invention.
5 is a plan view of a grass pile according to another embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention, and the manner of achieving them, will be apparent from and elucidated with reference to the embodiments described hereinafter in conjunction with the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. To fully disclose the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout the specification.

Unless defined otherwise, all terms (including technical and scientific terms) used herein may be used in a sense commonly understood by one of ordinary skill in the art to which this invention belongs. Also, commonly used predefined terms are not ideally or excessively interpreted unless explicitly defined otherwise.

In the drawings, the thickness and the size of each component are exaggerated, omitted, or schematically shown for convenience and clarity of explanation. Also, the size and area of each component do not entirely reflect actual size or area.

Further, the angles and directions mentioned in the description of the structure of the embodiment are based on those shown in the drawings. In the description of the structures constituting the embodiments in the specification, reference points and positional relationships with respect to angles are not explicitly referred to, reference is made to the relevant drawings.

Hereinafter, the lawn fixing pile of the present invention will be described.

The grass fixing pile according to an embodiment includes a body 100, a fixing part 200 and a header 300, and the body, the fixing part, and the header are formed of a biodegradable resin composition.

First, a biodegradable resin composition for forming pile for grass fixing will be described.

The biodegradable resin composition may include a biodegradable synthetic polymer, starch and an organic clay.

A biodegradable synthetic polymer is a biodegradable polymer produced by chemical synthesis and is a degradable polymer which is decomposed by the action of naturally occurring microorganisms such as fungi and bacteria.

Microorganisms, such as fungi or bacteria, can make proteins, hexanes, polysaccharides and the like, but they are energy-storing substances that take organic matter and store it in cells or out of the body. Biodegradable synthetic polymers mainly composed of carbohydrates are decomposed very easily by microorganisms in the soil. In the presence of air, they decompose into carbon dioxide gas and water. When air is not present, they are decomposed into methane (CH ₄ ) and water.

Among the biodegradable synthetic polymers, aliphatic polyester polymers are effective because of their excellent decomposition characteristics when the structure of the main chain linking compound is an ester.

Among the aliphatic polyester polymers, polybutylene adipate-co-terephthalate or polycaprolactone is preferable.

The polybutylene adipate-co-terephthalate may be represented by the following formula (1).

[Chemical Formula 1]

(Wherein x and y are integers of 1 or more)

The polycaprolactone can be synthesized by ring-opening polymerization with anionic, cationic or coordination catalyst as a thermoplastic polymer having crystallinity and a melting point of 60 캜.

The degradation of biodegradable synthetic polymers proceeds in two stages. In the first step, the molecular weight decreases due to the main chain cleavage due to random hydrolysis. In the second step, the degradation of the biodegradable synthetic polymer occurs due to the decomposition of low molecular weight fragments and small fragments. .

The biodegradable synthetic polymer may be 40 to 99% by weight, preferably 60 to 95% by weight, based on 100% by weight of the sum of the biodegradable synthetic polymer and all of the biodegradable synthetic polymer. When the biodegradable synthetic polymer is less than 40% by weight, the effect of biodegrading the grass fixing pile is insignificant. When the biodegradable synthetic polymer is more than 99% by weight, the modulus of the grass fixing pile is considerably decreased.

Starch preferably uses potato starch or corn starch. In some cases, potato starch and corn starch can be mixed together.

The constituents of starch are straight-chain amylose in which glucose is linked by α-1,4 bond and high-molecular-weight amylopectin in which glucose is bonded in several branches through α-1,6 bonds to short amylose. great.

The starch may be used in an amount of 1 to 60% by weight, preferably 5 to 40% by weight, based on 100% by weight of the total amount of the biodegradable synthetic polymer and the whole of the biodegradable synthetic polymer. When the content of starch is less than 1% by weight, the durability of the grass-fixing pile as a final molded product is lowered, and when it exceeds 60% by weight, improvement of the biodegradation effect is insignificant.

Organoclay is an organism made of clay organic molecules. Biodegradable synthetic polymer and starch have a polar group with affinity to clay, which has a structure favorable for making a clay and a complex, and biodegradable synthetic polymer And the clay remains after the starch is decomposed, it does not affect the environment, and therefore, it is an excellent effect as one component of the biodegradable resin composition.

The clay may be montmorillonite or cloisite. In some cases, the clay may be used in combination.

The montmorillonite is a layered silicate mineral of the mica type belonging to the smectite group in Mineralogy, from the fill light (pyrophylite) structure Pyro to octa-hydroxy LAL (octahedral) sheets instead of Al ^{3 +} ions Mg ^{2 +,} Fe ^{2 +} Or Fe ^{3 +} ions have a structure in which a tetrahedral sheet is substituted with Al ^{3 +} ions instead of Si ^{4 +} ions.

The chlorite can be selected from a wide variety of chlorites, but preferably chlorite 30B can be used.

The clay may have an average length of 50 nm to 100 탆. Here, the average length means an average value of the length in the longitudinal direction of the clay.

The organic molecules that organize the clay may be selected from the group consisting of ammonium, phosphonium, maleate, succinate, acrylate, benzylic hydrogen, oxazoline, ). Preferably ammonium, and primary ammonium, secondary ammonium, tertiary ammonium, quaternary ammonium or alkylammonium can be used.

The organic molecules can increase the distance between the silicate layers of the clay and improve the affinity between the clay, the biodegradable synthetic polymer and the starch to uniformly disperse the clay in the continuous biodegradable synthetic polymer and starch, Starch may have intercalated compound forms inserted between the layers of the organic clay.

The organic clay may contain 1 to 10 parts by weight, preferably 2 to 7 parts by weight, based on 100 parts by weight of the sum of the biodegradable synthetic polymer and the starch. When the amount of the organic clay is less than 1 part by weight, it is difficult to uniformly disperse the biodegradable synthetic polymer and the starch. When the amount exceeds 10 parts by weight, the improvement of the biodegradation effect is insignificant.

Hereinafter, the lawn fixing pile of the present invention will be described with reference to the drawings.

The grass fixing pile may include a body 100, a fixing part 200, and a header 300.

Referring to FIG. 3, the grass fixing pile has a header 300, a body 100, and a fixing part 200 sequentially connected from an upper end thereof.

The fixing part 200 is provided at the lower end of the body 100 and is positioned in a direction to be inserted into the ground so that the grass fixing pile can be fixed in the soil after it is inserted.

The fixing part 200 may include an inclined part 210 formed to have a diameter larger than the diameter of the body 100 and having a smaller diameter as it goes down. Lt; / RTI >

Specifically, the inclined portion 210 may have a multi-step inclined surface on the outer surface along one direction of the fixing portion. At this time, a plurality of the inclined portions 210 may be formed in a plurality of directions, preferably 2 to 4, and the plurality of inclined portions 210 may be arranged at regular intervals.

The header 300 is provided at the upper end of the body 100 and is located at the head portion of the grass fixing pile.

The header 300 may have extension plates 310 extending in a plurality of different directions from the center, preferably two to six extension plates 310, and most preferably four May be provided and each extending plate may be positioned in a direction perpendicular to each other.

The width of the extension plate 310 may increase as the extension plate 310 moves away from the center, and the width of the extension plate 310 may be increased by curving the extension plate 310 in the outward direction of the extension plate 310 (see FIGS. 4 and 5) .

The header 300 having the extending plate 310 as described above has a plurality of elongated plates extending in different directions from each other, thereby supporting the grass 300 sufficiently while the grass is planted.

The body 100, the fixing part 200, and the header 300 constituting the lawn fixing pile are each composed of the biodegradable resin composition described above and are decomposed and removed naturally after a certain period of time after insertion.

Specifically, the body 100 and the fixing part 200, which are completely inserted into the soil, contain 75 to 95% by weight of the biodegradable synthetic polymer, 5 to 25% by weight of the starch, . The header 300, which is not completely inserted into the soil but may be present on the ground, may contain 60 to 80% by weight of the biodegradable synthetic polymer and 20 to 40% by weight of the starch per 100% by weight of the biodegradable synthetic polymer and starch .

Hereinafter, results of experiments for demonstrating the excellent effects of the biodegradable lawn fixation pile of the present invention are shown.

The biodegradable grass-fixing piles of Examples and Comparative Examples were prepared from biodegradable resin compositions containing the component content ratios shown in Table 1 below.

The contents of the ingredients shown in Table 1 are expressed in weight percent based on 100 weight% of the biodegradable synthetic polymer and starch, and weight parts based on 100 weight part of the sum of biodegradable synthetic polymer and starch.

Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Polybutylene adipate-co-terephthalate 90 80 70 100 - Corn starch 10 20 30 - - Polybutylene succinate - - - - 100 Organic clay
(Montmorillonite) 5 5 5 5 5

The modulus, tensile strength and elongation at break of the grass pile made from the biodegradable resin compositions of Examples 1 to 3 and Comparative Examples 1 and 2 were measured.

Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Modulus
(MPa) 128.9 125.5 210.2 81.8 462.1 The tensile strength
(kgf / cm ² ) 16.4 12.5 10.2 19.7 36.6 Elongation
(%) 713 572 523 909 16

From the above Tables 1 and 2, it can be seen that the biodegradable resin compositions of Examples 1 to 3 have excellent modulus, tensile strength and elongation.

When the starch was not contained, the tensile strength and the draw ratio were excellent, but the modulus was remarkably low (Comparative Example 1). In the case of using polybutylene succinate as the biodegradable synthetic polymer, the modulus and tensile strength were excellent, It is difficult to apply it as grass fixing pile.

The scope of the present invention is not limited to the above-described embodiments, but may be embodied in various forms of embodiments within the scope of the appended claims. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the appended claims.

10: Body 20:
30: Header 100: Body
200: fixing part 210: inclined part
300: header 310: extension plate

Claims (10)

body;
A header formed at an upper end of the body and having an extension plate extending in a plurality of different directions from a center; And
And a fixing part formed at a lower end of the body,
The width of the extension plate provided in the header increases as the distance from the center increases,
Wherein the fixing portion includes an inclined portion formed to have a diameter larger than a diameter of the body and having a smaller diameter as it goes downward,
Wherein the inclined portion is formed on the outer surface of the fixing portion so as to have a multi-step inclined surface in the form of a wedge,
Wherein the body, the header, and the fixation portion are made of a biodegradable synthetic polymer containing at least one of polybutylene adipate-co-terephthalate or polycaprolactone, Wherein the biodegradable resin pile is formed from a biodegradable resin composition containing a biodegradable resin.
The method according to claim 1,
In the biodegradable resin composition,
Based on 100% by weight of the sum of the biodegradable synthetic polymer and the starch,
40 to 99% by weight of the biodegradable synthetic polymer and
A biodegradable lawn pile comprising 1 to 60% by weight of the starch.
The method according to claim 1,
In the biodegradable resin composition,
And 1 to 10 parts by weight of the organic clay with respect to 100 parts by weight of the sum of the biodegradable synthetic polymer and the starch.
The method according to claim 1,
Wherein the starch is at least one of potato starch or corn starch.
The method according to claim 1,
Wherein the organic clay is at least one clay of montmorillonite or chlorite is at least one organic molecule selected from the group consisting of ammonium, phosphonium, maliate, succinate, acrylate, benzylic hydrosene and oxazoline Organized biodegradable turf fixing piles.
6. The method of claim 5,
Wherein the clay has an average length of 50 nm to 100 탆.
The method according to claim 1,
In the biodegradable resin composition,
Wherein the biodegradable synthetic polymer and the starch are in the form of an intercalation compound intercalated between the layers of the organic clay.


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