KR101149832B1 - Biodegradable resin omposition and sol particle confinement cellular reinforcement using thereof - Google Patents

Abstract

PURPOSE: A sol particle-confining bee-hive type reinforcing material using polylactic acid as main ingredient is provided to control biodegradation property and obtain excellent rigidity, tensile strength, and thermal stability. CONSTITUTION: A sol particle-confining bee-hive type reinforcing material using polylactic acid as main ingredient(400) can have either a cell shaped net structure or a cell network structure. A manufacturing process of the cell shaped net structure comprises the following steps: processing filament yarn or processing a core to a sheet; welding one part of the laminated sheet with ultrasonic waves; and using a core yarn in which filament is diffused in a bundle shape and welded as woof reinforcing yarn(410) and/or warp reinforcing yarn(420). A manufacturing method of a cell network structure comprises the following steps: forming a meshed sheet(440) having air gaps(430) by crossing the woof reinforcing yarn and warp reinforcing yarn; fusing and interlinking the sheet in width direction; pulling the sheets in a specific direction.

Description

Biodegradable synthetic resin composition and biodegradable resin omposition and sol particle confinement cellular reinforcement using

The present invention relates to a biodegradable synthetic resin composition and a lipophilic restrained honeycomb reinforcement using the same, and more specifically, polymer resins having different biodegradation properties are mixed at a predetermined weight ratio, and biodegradable selective expression and biodegradation in the mixture. The present invention relates to a biodegradable resin composition method having excellent stiffness, improved flexibility, heat resistance, impact resistance, and the like, and an constituent- restrained honeycomb reinforcement using the same, and the preparation thereof, by controlling additives for controlling the resolution.

In forming a honeycomb reinforcing material, polymer compounds such as polyethylene and polypropylene are used as molding materials. When a product molded from such a polymer compound is applied to the environmental field, in particular, the planting base layer, the compound is hardly decomposed in the natural environment after the end of its useful life, and remains semi-permanently in the soil, so that the landscape is damaged, land pollution, marine Problems such as habitat destruction of living things, etc. are caused.

In particular, when constructing slopes or lake banks that are prone to erosion and collapse due to rainfall and runoff, slope reinforcement is installed to prevent slope erosion and collapse. This too long will have a significant impact on the soil ecosystem in the future, there was a problem of becoming a secondary environmental pollution source.

For this reason, despite the excellent performance of the honeycomb reinforcement, there are many limitations in the applications where a natural method or environmentally friendly performance is required.

Therefore, in the present invention, the physical properties such as nucleating agents are improved in a mixture of polylactic acid, which is a plant-derived biodegradable resin, as a main raw material, and a mixture of polylactic acid, which is the main raw material, and another biodegradable polymer resin having a relatively high biodegradability. The object of the present invention is to provide a biodegradable resin composition capable of controlling biodegradability by mixing additives at an appropriate weight ratio and ensuring thermal stability, required mechanical properties, and the like.

In another aspect of the present invention, it is another object of the present invention to provide a granular restrained honeycomb-type reinforcing material whose biodegradability is controlled using the biodegradable resin composition disclosed above.

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In addition, in the present invention, the filament yarn or the core made of the filament yarn by spinning the biodegradable resin composition described above, and the filament yarn or core is processed into a strip-shaped sheet having a predetermined width to form the sheet. Ultrasonic fusion of a portion in a plurality or more overlapping state is a structure that is formed into a cell-type net or pulled by welding the core or filament yarn having a predetermined thickness supplied by spinning the biodegradable resin composition in a bundle form Using the core yarns as transverse reinforcement yarns and / or longitudinal reinforcement yarns, the transverse reinforcement yarns and the longitudinal reinforcement yarns intersect to form a mesh sheet having a certain size of voids, and the sheets are spaced at regular intervals in the width direction. Pulling in one direction after the fusion connection is characterized in that the structure to form a plurality of honeycomb cell network It provides a biodegradable controlled ability toripja bound honeycomb reinforcement that.

The biodegradable resin composition of the present invention can be mixed in a mixture of polylactic acid and other biodegradable polymer resins in an appropriate weight ratio by mixing a property improvement additive such as a nucleating agent to control biodegradation, and to secure thermal stability in a high temperature environment. Various molded articles can be molded without thermal deformation, and in particular, the spinning can be carried out by filament yarn using a high-temperature spinneret nozzle, thereby making it easy to manufacture a molded article such as a mat using the filament yarn.

In addition, the biodegradable resin composition of the present invention improves the properties of polylactic acid that causes thermal deformation during spinning at high temperature, so that thermal deformation does not occur during spinning at high temperature, so that the processing molding is possible in the form of sand. It is possible to control and secure the physical properties such as excellent stiffness, tensile strength, thermal stability, and can be processed into biodegradable filament yarn having excellent processability, such as mat having a certain thickness of irregular arrangement.

In addition, a sheet prepared using the biodegradable resin composition or filament yarn disclosed in the present invention, or a reticulated sheet of filament or core yarn, which is supplied by spinning, is fused to form a honeycomb-shaped reinforcement restraint reinforcing material. After the stabilizer is stabilized, it can be processed into a biodegradable controlled vesicle-constrained honeycomb reinforcement that is biodegraded in a natural state after a certain time to prevent soil contamination.

1 and 2 illustrate an example of a reinforcing material manufactured according to an embodiment of the present invention.
Figure 3 is a partial front view showing the structure of the reticulated sheet according to an embodiment of the present invention.
Figure 4 shows the cell portion of the reticulated sheet according to one embodiment of the present invention.
5 is a long-term biodegradation behavior comparison curve of biodegradable controlled resin compositions (BLEND-A and BLEND-B).

BRIEF DESCRIPTION OF THE DRAWINGS The present invention will be described in more detail with reference to the accompanying drawings.

The present invention relates to a biodegradable resin composition, wherein the composition according to the present invention improves and secures various physical properties in a mixture of polylactic acid and a polymer resin having different biodegradability having different biodegradability in an appropriate weight ratio. It is made by mixing an additive for.

Biodegradable resin composition according to the present invention is 0.5 to 2 parts by weight of a resin mixture nucleating agent mixed to include 30 to 90% by weight of polylactic acid (hereinafter referred to as 'PLA') and 70 to 10% by weight of a polymer resin It is made by mixing to include.

The polymer resin constituting the present invention is polybutylene adipate-co-butylene terephthalate (Pobutylbutyleneadipate-co-butyleneterephthalate (PBAT), polybutylene succinate (PBS), copolyester (Copolyester) Preference is given to using one kind or a mixture of two or more kinds selected from the group consisting of.

The PBAT, PBS, copolyester and the like are also known as biodegradable materials in nature.

The nucleating agent used in the present invention uses talc or calcium carbonate. The nucleating agent enables to secure stiffness close to the initial stiffness of polylactic acid without causing a decrease in flexibility, and slows down the rate of biodegradation. Therefore, the biodegradation can be controlled according to the amount of the nucleating agent added.

In addition, by further adding a chain extender (chain extender) to the composition can improve the processability and mechanical properties, the addition amount is determined according to the manufacturing process design.

Preferably, the chain extender is ethylene glycol, diethylene glycol, propylene glycol, dipropylene glycol, 1,4-butanediol, and 1,4-butane diol. ), Polypropylene glycol 400, m-Phenylene diamine, methanolamine (Diethanolamine), triethanolamine (Triethanolamine), at least one selected from the group consisting of glycerol (Glycerol) It is good to use.

Disclosed is a biodegradable composition of the present invention, or a filament yarn which can be processed into the composition.

According to the present invention, there is provided a biodegradation-controlled honeycomb restrained honeycomb reinforcement made of the biodegradable resin composition or filament yarn disclosed above.

1 and 2, the reinforcing member is processed by ultrasonically fusion of a portion of the biodegradable resin composition or filament yarn into a strip-shaped sheet 310 having a predetermined width in a state where a plurality or more of the sheets are overlapped. When pulled, it becomes a structure formed into a cellular network.

The reinforcing material is a horizontal reinforcing yarn 410 and / or longitudinal reinforcing yarn to the core having a predetermined thickness supplied by spinning the biodegradable resin composition or the core yarn (fused) fused by spinning the filament yarn in a bundle form As the 420, the transverse reinforcing yarn 410 and the longitudinal reinforcing yarn 420 intersect to form a reticulated sheet 440 having a predetermined size of air gaps 430, and the sheet 440 is spaced at regular intervals in the width direction. Pulled in one direction after the fusion connection to form a structure of forming a plurality of honeycomb cell net 450.

The reticulated sheet is preferably a reinforcing yarn 410 and the longitudinal reinforcing yarn 420 is a network structure of any one type selected from the form of +,, *.

The sheet or the transverse reinforcing yarn and the longitudinal reinforcing yarn is preferably fused by any one of the welding method selected from ultrasonic welding, hot melt welding, hot wedge welding, hot air welding.

It is preferable that the widthwise end of the reticulated sheet is formed at the end of the horizontal reinforcement yarn and the vertical reinforcement yarn to be sharply formed.

It is preferable that the strip | belt-shaped sheet is provided with the unevenness | corrugation for a frictional force increase in the junction part with land.

Hereinafter, the present invention will be described in more detail with reference to preferred embodiments. However, the present invention is not limited to the following examples.

Example 1

2.0 parts by weight of polyethylene glycol (PEG) compatibilizer, 1.0 part by weight of talc as nucleating agent, based on 100 parts by weight of a biodegradable resin mixture consisting of 80% by weight of polylactic acid and 20% by weight of polybutylene succinate Biodegradable resin composition was prepared by mixing 0.5 parts by weight of ethylene glycol as a chain extender.

The prepared composition is melted in a melt extruder at a melting temperature of 200 conditions and then supplied to the spinneret to spin to produce a filament of a predetermined thickness, and heat-sealed the prepared filament as a transverse reinforcing yarn and a longitudinal reinforcing yarn as shown in FIG. A reticulated sheet was produced. The horizontal reinforcing yarn and the vertical reinforcing yarn have a thickness of 2.5 mm, and the width × length: 20 cm × 10 cm.

[Example 2]

100 parts by weight of biodegradable resin mixture consisting of 60% by weight of polylactic acid and 40% by weight of copolyester was mixed with 1.0 part by weight of talc with a nucleating agent and 0.2 part by weight of ethylene glycol with a chain extender. The biodegradable resin composition was prepared, and the preparation of the specimen was prepared in the same manner as in Example 1, and the horizontal reinforcing yarn and the vertical reinforcing yarn used were spun filament yarn, and a core formed to have a thickness of 3 was used.

[Comparative Examples 1 to 3]

As biodegradable resins, polylactic acid (Comparative Example 1), polybutylene adipate-co-butylene terephthalate (Comparative Example 2), and polybutylene succinate (Comparative Example 3) were used alone and Specimens were prepared in the same manner.

The specimens of Examples 1 and 2 prepared above were compared with the biodegradation control tests of Comparative Examples 1 to 3, and the test results are shown in FIG. 3. As a result shown in Figure 3, it can be seen that the control of the biodegradation is possible according to the mixing of the planned resin composition (BLEND-A).

Here, the biodegradation control test used the following test method.

The prepared specimen was placed in a container prepared in a constant temperature and humidity chamber, and the standard compost was embedded in it, and the temperature was maintained at 35 ° C. and RH 90% to measure the retention of tensile strength over time.

Evaluation of the physical properties of the specimens of Examples 1 and 2 described above and the specimens of Comparative Examples 1 to 3 was compared, BLEND-A in the result graph of Figure 3 attached to the test results of the specimen prepared with the composition of Example 1 BLEND-B is the test result of the specimen prepared from the composition of Example 2.

300, 400: reinforcing material 310: band-shaped sheet
320, 450: cell 410: transverse reinforcement
420: longitudinal reinforcement 430: void
440: reticulated sheet

Claims (2)

delete 30 to 90% by weight of polylactic acid (PLA),
One or two selected from the group consisting of polybutyleneadipate-co-butyleneterephthalate (PBAT), polybutylene succinate (PBS), and copolyester (Copolyester) A filament yarn or a core made of the filament yarn obtained by spinning the biodegradable resin composition mixed so as to contain 0.5 to 2 parts by weight of the nucleating agent with respect to 100 parts by weight of the resin mixture mixed to contain 70 to 10% by weight of the polymer resin comprising the above mixture ( core), the filament yarn or core is processed into a strip-shaped sheet having a predetermined width, and a plurality of sheets are ultrasonically fused in a state where the sheets are overlapped and pulled to form a cellular network, or Bunch the core or the filament yarn having a predetermined thickness supplied by spinning the biodegradable resin composition The core yarns, which are fused and fused, are used as transverse reinforcement yarns and / or longitudinal reinforcement yarns to form a reticulated sheet having a certain size of voids while the transverse reinforcement yarns and the longitudinal reinforcement yarns cross each other, and the sheets are in the width direction. Biodegradation-controlled honeycomb restrained honeycomb reinforcement, characterized in that the structure to form a plurality of honeycomb-shaped cell nets when pulled in one direction after fusion connection at regular intervals.

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