KR101745452B1 - Environment-Friendly Mulching Material with Improved Tensile Strength - Google Patents

Abstract

The present invention relates to an eco-friendly natural decomposition mulching material which solves the problem of weak strength (tensile force) of a mulching material made of a conventional vinyl film or a biodegradable film. The present invention relates to: (A) 15: 1 part by weight of a natural adhesive containing 0.2 to 1.5 by weight; And (B) natural cotton: natural rayon, natural hemp, or a mixture thereof, and natural fiber extracted from one or more selected from the group consisting of coconut and almond bran or sugar cane, at a ratio of 15 to 29:12 to 22: 7 to 13 And 12 to 16 parts by weight of a fibrous part which is contained in a weight ratio of 50 to 100 parts by weight of the natural mackerel. According to the present invention, it is possible to provide an eco-friendly natural decomposing mulching material which can be treated in the same manner as the vinyl film mulching material in the production process or the field of use, while having a tensile strength higher than that of the conventional biodegradable mulching material, It becomes.

Description

Environment-Friendly Mulching Material with Improved Tensile Strength with Improved Tensile Strength [

The present invention relates to an eco-friendly natural decomposition mulching material, and more particularly, to an eco-friendly natural decomposition mulching material that solves the problem of weak strength (tensile force) of a mulching material using a conventional vinyl film or biodegradable film.

Mulching is used for the purpose of preventing soil erosion, maintaining soil moisture, controlling low temperature, controlling weeds, and preventing soil contamination when cultivating crops.

In the early days, eco-friendly materials such as rice straw, straw straw, and grass were used as mulching materials. Recently, synthetic resin (vinyl) films, which are cheap and easy to install, are mainly used. However, such a vinyl film mulching material is easy to install, but it is not biodegradable. Therefore, the vinyl film mulching material must be collected after use. However, the collection process is not easy and the recovery rate is low and soil contamination is caused by residual vinyl.

Two types of decomposable agricultural mulching materials are known that can reduce labor costs, environmental degradation, and environmental restoration costs due to such vinyl film mulching materials.

First, it is a type of mulching material which is based on a synthetic resin raw material, and in which a biodegradable polymer is added to easily disintegrate the film form. U.S. Patent No. 5,407,979 discloses a degradable thermoplastic film comprising an alkanoyl polymer, an ethylene polymer and starch which is a biodegradable polymer. Japanese Patent Registration No. 10-0545271 discloses a process for producing a polylactic acid such as stearic acid, lactic acid, ethyl acetate and powdered milk by a method comprising mixing LDPE (low density polyethylene), LLDPE (linear low density polyethylene), HDPE (high density polyethylene), PSP (polystyrene paper) Of a plastic resin is mixed and extruded. However, by using a plastic resin as a base polymer, they appear to be "biodegradable" due to disintegration of the film, but still have a problem of soil contamination due to the residual microfilm of the plastic resin in the soil.

As another type of biodegradable mulching material, there is a biodegradable natural material as a raw material. Korean Patent Laid-Open No. 10-2004-0021196 discloses a mulching mat reinforcing the strength by melt-spraying a biodegradable resin on a roll-shaped recycled paper. In Korean Patent Laid-Open No. 10-2010-0116974, A biodegradable mulching material containing a vegetable glue, an animal glue, a pigment, a catalyst, and a tapioca is added to the fiber raw material composed of natural rayon or natural horses or a mixture thereof, Environmentally decomposable mulching materials including natural fibers extracted from pine almonds, sugar cane or bamboo, and natural adhesives which are vegetable glue or animal glue, are disclosed. However, they can be completely biodegradable, but they are not widely used because they are inconvenient at the time of manufacturing and on-site handling because of their low tensile strength within the economical range.

For example, the above-mentioned Japanese Patent No. 10-1347898 has been developed by the inventors of the present patent application, and has been manufactured with a thickness (80 to 100 탆) sufficient to maintain economical efficiency, and showed excellent results in the field. However, although the tensile strength of the mulching material thus produced is 6.4 to 7.2 kg / mm < 2 >, there is still a problem that the film is partially torn and twisted in the film forming process (felt forming process). Also, the mulching material according to the above-mentioned Japanese Patent No. 10-1347898 is not easy to control the decomposition time and disintegration time of the mulching material, so that the disintegration has not been successfully performed within 3 to 4 months, which is an appropriate maintenance period in Korea. If it is not sufficiently decomposed within 3 to 4 months, there will be a problem that the mulching material remaining on the tractor or the tiller wheel is wound when the plowing is carried out for the fall agriculture so that the work becomes impossible.

The present invention has been made as a result of research and development aiming at enhancing the tensile strength and the control of the mulching re-decomposition time by improving the above-mentioned Japanese Patent No. 10-1347898.

U.S. Patent No. 5,407,979 Patent No. 10-0545271 Korean Patent Publication No. 10-2004-0021196 Korean Patent Publication No. 10-2010-0116974 Patent No. 10-1347898

The present invention relates to a biodegradable eco-friendly mulching material which can be decomposed naturally and composted after completion of its functions, which does not require labor for recovery and does not require environmental destruction and environmental restoration. And has a tensile strength similar to that of the natural decomposition mulching material.

Another object of the present invention is to provide an eco-friendly natural decomposing mulch material which can easily control the decomposition point of the mulching material.

In order to accomplish the above object, the present invention provides a cosmetic composition comprising: (A) 1 part by weight of a natural adhesive comprising a gelatin: PVA: Hwangsu Extract at a weight ratio of 3-7: 10-15: 0.2-1.5; And (B) natural cotton: natural rayon, natural hemp, or a mixture thereof, and natural fiber extracted from one or more selected from the group consisting of coconut and almond bran or sugar cane, at a ratio of 15 to 29:12 to 22: 7 to 13 And 12 to 16 parts by weight of a fibrous part which is contained in a weight ratio of 50 to 100 parts by weight of the natural mackerel.

In the present invention, the natural adhesive may further include at least one of marine extract, marigold extract, seaweed extract, plant starch, pulp powder, collagen and casein.

The mulching material according to the present invention may further comprise 0.03 to 0.15 parts by weight of a coloring matter to 1 part by weight of the natural adhesive. At this time, the pigment may be any one or a mixture of two or more selected from charcoal powder, squid ink, charcoal liquid, animal blood, and secretions of shellfish. It is preferable that these pigments are prepared in advance in such a manner that they are mixed with the natural adhesive.

The mulching material according to the present invention may further include 0.05 to 1 part by weight of an additive to 1 part by weight of the natural adhesive. The additive may be any one or a mixture of two or more selected from volcanic rock, zeolite, silicate, water-soluble silicate, natural clam powder and mica. Manufacturing Normally, these additives are preferably prepared in advance by mixing with the natural adhesive.

According to the present invention, it is possible to provide an eco-friendly natural decomposing mulching material which can be treated in the same manner as the vinyl film mulching material in the production process or the field of use, while having a tensile strength higher than that of the conventional biodegradable mulching material, It becomes.

Further, according to the mulching material of the present invention, since all of the mulching materials are produced only as natural raw materials that can be decomposed spontaneously, they have excellent air permeability and are naturally decomposed by soil microorganisms. In addition, it inhibits germination and growth of weeds by blocking sunlight, becomes a feed of useful microorganisms in the degradation process, and is a good fermentation compost raw material due to natural ecosystem recovery and useful microorganism growth.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exemplary flow chart of a process for manufacturing an environmentally friendly natural decomposition mulching material according to the present invention. FIG.
FIG. 2 is a photograph showing an application example of the environmentally-friendly natural decomposition mulching material according to the present invention produced in the example. FIG.
Figs. 3 to 6 are photographs showing the state immediately after the application of the eco-friendly natural decomposing mulch material according to the present invention and 20, 60 and 90 days after the application.
FIG. 7 is a photograph showing the state of the environment-friendly natural decomposition mulching material according to the present invention manufactured in each example for about 110 days after application. FIG.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail with reference to the accompanying drawings. It should be understood, however, that the appended drawings illustrate only the contents and scope of technology of the present invention, and the technical scope of the present invention is not limited thereto. It will be apparent to those skilled in the art that various changes and modifications can be made within the scope of the technical idea of the present invention based on these examples.

As described above, the present invention relates to a cosmetic composition comprising a natural adhesive containing gelatin, PVA, and a coconut extract and at least one selected from a natural raw cotton, a natural raw rayon, a natural raw material or a mixture thereof, a raw material of coconut and almond, And a fibrous part containing extracted natural fibers. The present invention relates to an eco-friendly natural decomposition mulching material having improved tensile strength.

The present inventors have produced and tested natural decomposing mulch materials at various ratios and ratios. As a result, it has been found that the tensile strength is sufficiently improved and that at the appropriate time in the field, It was confirmed that the components and the addition amount of the natural adhesive are very important, rather than controlling the addition amount.

Therefore, the present inventors have searched for various natural adhesives to satisfy the conditions of ① improving the tensile strength of the mulching material, ② controlling the mulching material decomposition time, ③ providing economic mulching material, and ④ stably maintaining the dye and the additive without leakage, And natural adhesives based on the extract of Hwangryeokyugi.

In the present invention, the natural adhesive includes gelatin: PVA: Hwangsugi extract at a weight ratio of 3-7: 10-15: 0.2-1.5.

Gelatin is a type of inducible protein derived from collagen, a natural protein that makes up the animal's skin, tendons and cartilage. It is extracted from boiled or boiled hot water after treatment with alkali or acid. Since the gelatin used in the present invention is not edible for direct ingestion, it is only necessary to use gelatin purified only to the extent that there is no harmful harmful component. When the gelatin is used in an amount less than the above range, the tensile strength of the final mulching material is not improved. If the gelatin is used more than this range, the mulching material becomes too stiff, which is a problem in use.

PVA (polyvinyl alcohol) is a biodegradable, water-soluble polymer known to have excellent film formation, emulsion, and adhesion properties. If the PVA is used in a smaller amount than the above range, molding of the mulching film is not easy.

When a mixture of gelatin and PVA is added in an amount of 12 wt% or more based on the above amount of addition, PVA is added up to 7 wt%, the overall tensile strength of the prepared mulching material is maintained, but flexibility is reduced. Crick was generated finely. Therefore, we have solved the Crake problem by adding a small amount of Hwangryeokyu extract.

It is an annual herb that belongs to the mugwort family, and its root is rich in mucilage, and its extract is widely used as a viscous agent in Hanji Industrial Co., for example. When the extract of Hwangsu-gyu is used in an amount less than the above range, the occurrence of crake can not be prevented.

As briefly mentioned in the examples below, in the production of the mulching material according to the present invention, the natural adhesive is used in the production of the 'adhesive liquid' dissolved in water, and water is removed in the drying step. At this time, it is preferable to add at least one of marine extract, mugwort extract, seaweed extract, plant starch, pulp powder, collagen and casein to the natural adhesive so as to secure the fluidity of the adhesive liquid and improve the adhesive strength and durability of the adhesive liquid Do. In the following example, kelp extract was used.

In the present invention, the fibrous part may comprise natural fibers extracted from one or more selected from the group consisting of natural cotton: natural rayon, natural hemp, or a mixture thereof, and fiber raw materials: coconut oil and almond oil or sugar cane; : 7 to 13 weight ratio.

The natural cotton may be used to control the humidity of the soil while supplying organic matter to the soil. Examples of the natural cotton include, but are not limited to, wool, goose hair, pongee cotton, and cotton swab. Preferably, however, the use of cotton swabs can supply a large amount of organic matter to the soil, and the humidity of the soil can be suitably controlled.

If the natural cotton is included in the above range, the shape of the natural mulching material finally produced can be properly formed, and the air permeability can be improved to improve the breathability of the soil.

As the fiber raw materials, natural rayon, natural hemp, or a mixture thereof may be used. Examples of the natural rayon include viscose rayon, copper ammonium rayon, lyocell and acetic acid fiber, natural rayon such as Ramie, Linen, Flax, hemp, hemp, jute, : Jute), manila and sisalma, and the like.

In the present invention, when the fiber raw material is included in the above range, the ultraviolet shielding function can be improved and the tensile strength can be improved.

In the present invention, the natural fiber is extracted from one or two or more selected from coconut, almond and sugar cane. By including the natural fiber in the above range, the mulching material is easily decomposed spontaneously and the tensile strength is improved.

In the mulching material according to the present invention, the weight ratio of the natural adhesive to the fibrous part is 1:12 to 16, the viscosity of the mixture is improved, the fluidity is ensured, the work is facilitated, and the tensile strength and elasticity The mechanical properties can be improved. If the fibrous part is smaller than the above range, the mulching material is easy to fabricate, but the flexibility of the mulching material is low and it is difficult to install the material on the field. If the fibrous part is larger than the above range, the binding force of the mulching material falls.

The coloring matter may be any one or a mixture of two or more selected from charcoal powder, squid ink, charcoal liquor, animal blood, and shellfish secretion. In this case, the color expressed in black may protect the crop from ultraviolet rays and direct sunlight There is an effect.

In the present invention, the additive may include any one or a mixture of two or more selected from volcanic rocks, zeolites, silicates, water-soluble silicic acids, natural clam powders or mica. When the volcanic ash or zeolite powders are used, It is possible to improve the intelligence. In addition, the addition of silicate improves the antimicrobial activity and can inhibit harmful pathogens to crops.

The eco-friendly natural decomposition mulching material according to the present invention can eliminate the remaining material through the natural decomposition of the mulching material, thereby reducing the manpower, inhibiting the germination and growth of the weed by blocking the sunlight, It can be a good fermentation compost raw material due to the growth of microorganisms.

[ Example ]

(1) Preparation of natural adhesive and fibrous part

As a result of the preliminary test, the influence of the composition ratio of the fibrous part on the tensile strength and durability (biodegradation point) of the mulching material was found to be relatively small compared with the composition ratio of the natural adhesive. The components and proportions of the fibrous part were determined to be natural cotton 22, fiber raw material 17, and natural fibrous material 10 parts by weight. The natural adhesives were thoroughly mixed with 1 ton of water to form a solution (referred to as an 'adhesive liquid') as shown in the following table. 14 parts by weight of the fibrous part was mixed with 1 part by weight of a natural adhesive (water was not taken into consideration because it was later removed by drying).

In the preliminary test, the gelatin content was fixed because it was confirmed that the amount of gelatin was in the range of 3 to 7 parts by weight but 5 parts by weight was optimal.

The extracts of Hwangryeongguk were prepared in the following manner. : Dried / chopped yellow roots and water were mixed at a ratio of 1: 3 (weight ratio), and extracted for 2 days while stirring occasionally at room temperature. The filtrate was used to obtain an extract of Hwangsu-ku, and the extract was concentrated or completely dried. The yield of the completely dried Hwangryeok extract was about 15%. The extracts of Hwangryeongguk extract can be used as extracts or concentrated extracts or dried products.

The sea tangle extract was prepared in the following manner. : Dried / chopped kelp and water were mixed at 1: 3 (weight ratio), heated for 20 minutes and filtered. The ratio of adding the kelp extract extracted from 1 kg of dry / chopped kelp to 1 ton of natural adhesive.

(2) Manufacture of mulching materials for measurement of physical properties

42 g of the fibrous part was spread evenly in a 1 m x 1 m square frame to be felt, and about 130 ml of the adhesive liquid corresponding to 3 g of the natural adhesive (dry basis) was evenly sprayed. It was pressed with a flat plate and dried thoroughly. Then, both sides were evenly arranged at 90 ~ 100 ℃. This is to manually produce a mulching material in the same manner as in the continuous production process of the actual mulching material consisting of [forming of fiber felt → spraying of adhesive liquid → surface cleaning by rolling → drying → heat roller passing (ironing)].

(3) Measurement of tensile strength of the manufactured mulching material

The tensile strength of the mulching material thus prepared is measured and shown in the table below. The unit is kg / mm ² .

Measurement was carried out at a tensile speed of 10 mm / min using a tensile tester at a temperature of 23 ± 2 ° C and a relative humidity of 50 ± 2%.

The mulching materials prepared according to the examples have a tensile strength of 6.8 to 7.7, which means that the mulching materials have a sufficient tensile strength so that they are not problematic when applied to the manufacturing process and field.

(4) Measurement of degradability of the manufactured mulching material

The mulching material prepared in Example 2 was applied to actual fields and the decomposition characteristics were confirmed (Figs. 2 to 7).

In early May, mulching material was applied to fields and rice fields of Gongju - city in Chungcheongnam - do Province, and cherry seedlings, soybean and rice were transplanted by usual methods and the state of mulching material was observed over time. Figs. 3 to 6 are photographs showing the state immediately after application (Fig. 3) and 20 days, 60 days, and 90 days after application of the environmentally-friendly natural decomposition mulching material according to the present invention, .

The degree of decomposition of the mulching material was determined by the visual and tactile sense of the inventor and is shown in the table below.

As can be seen from the tables and photographs, when the mulching material according to the present invention was applied to the field, it was decomposed at 90% after 90 days, and after 100 to 120 days, only partial traces (Fig. 7).

Therefore, according to the present invention, it was confirmed that the mulching material was sufficiently decomposed within a desired time.

Claims (6)

1 part by weight of a natural adhesive comprising (A) a gelatin: PVA: Hwang Cjung extract at a weight ratio of 3-7: 10-15: 0.2-1.5; And
(B) Natural cotton: Natural rayon, natural hemp, or a mixture thereof Fiber raw material: Natural fibers extracted from one or more selected from coconut bloom and almond bloom or sugar cane are mixed with 15 to 29:12 to 22: 7 to 13 12 to 16 parts by weight of a fibrous part contained in a weight ratio;
Wherein the natural self-decomposing mulching material has an improved tensile strength.
The method according to claim 1,
The above-
Wherein the extract further comprises at least one of a seaweed extract, marigold extract, seaweed extract, plant starch, pulp powder, collagen and casein.
3. The method according to claim 1 or 2,
Further comprising 0.03 to 0.15 parts by weight of a coloring agent per 1 part by weight of the natural adhesive.
The method of claim 3,
Wherein the coloring matter is any one or a mixture of two or more selected from charcoal powder, squid ink, charcoal liquid, animal blood, and secretions of shellfish.
3. The method according to claim 1 or 2,
Further comprising 0.05 to 1 part by weight of an additive to 1 part by weight of the natural adhesive.
6. The method of claim 5,
Wherein the additive is one or a mixture of two or more selected from volcanic rock, zeolite, silicate, water-soluble silicate, natural clam powder and mica.

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