KR102539429B1 - Manufacturing method for biodegradable plate using hemp - Google Patents

Abstract

The present invention relates to a method for manufacturing a biodegradable plate material using hemp, and more particularly, to a method for producing a biodegradable plate material using hemp prepared by mixing a PLA resin with a fillet prepared by adding additives after crushing hemp, and then extruding the biodegradable plate material using hemp. It's about manufacturing methods. The present invention provides a biodegradable plate prepared by using a mixture of a mixture of a fillet produced from hemp stems and a PLA resin, while heating the mixture while gradually increasing the temperature at a temperature at which the hemp stems do not burn during the mixing process to achieve biodegradability. By manufacturing a biodegradable board with a mixture in which the cellulose that can be increased is preserved, the biodegradability of the biodegradable board can be greatly improved, and natural fiber wires are added to the biodegradable board during the extrusion process during the manufacturing process of the biodegradable board. By inserting and extruding, it is possible to increase the physical properties, tensile strength, and strength of the biodegradable plate material, and thus, there is an effect of providing a biodegradable plate material that can replace general plastics and guarantees high durability and quality.

Description

Manufacturing method for biodegradable plate using hemp {Manufacturing method for biodegradable plate using hemp}

The present invention relates to a method for manufacturing a biodegradable plate material using hemp, and more particularly, to a method for producing a biodegradable plate material using hemp prepared by mixing a PLA resin with a fillet prepared by adding additives after crushing hemp, and then extruding the biodegradable plate material using hemp. It's about manufacturing methods.

Polyethylene-based plastic materials are not only easy to process, but also are resistant to heat and have a certain level of strength, so they are highly usable and are used in various fields such as household goods, automobiles, and toys.

However, since these existing plastic materials take a considerable amount of time to naturally decompose, a significant amount of plastic waste is continuously generated as they are widely used in various fields, thereby continuously polluting the natural environment.

In order to prevent such pollution of the natural environment, recycling efforts of plastic materials are continuously continued, but the rate of recycling from plastic waste is extremely low, and there is a problem that is not enough to solve the problem of environmental pollution.

Therefore, recently, the development of biodegradable plastics that are naturally degraded in a short period of time using biodegradable materials such as hemp or PLA has been actively conducted.

However, plastics manufactured through the process of manufacturing plastics using existing hemp have a problem in that hemp is burned at a high temperature during the hemp processing process, and the hemp content contained in the plastic is low, so the biodegradation rate is low. Plastics manufactured using PLA have a problem of poor durability due to low strength.

Korean Patent Publication No. 10-2014-0148033

The present invention provides a biodegradable plate made using hemp and PLA, but provides a way to increase the hemp content in the processing of the biodegradable plate, thereby guaranteeing a high biodegradation rate of the biodegradable plate, and through an extruder. The purpose is to provide a biodegradable board that guarantees high durability by improving the physical properties and tensile properties of the biodegradable board in the process of extruding a mixture of hemp and PLA.

Method for producing a biodegradable plate material using hemp according to an embodiment of the present invention, the pellet manufacturing step of producing a pellet by mixing hemp powder and additives through a pellet maker, heating while mixing the pellet with the PLA resin through a mixer A mixing step of preparing a mixture, an extrusion step of extruding the mixture while heating it through an extruder, and an extrusion mold formed in the extrusion part of the extruder to which the extruded mixture is discharged, the extruded mixture in a preset plate form A mold step of manufacturing a biodegradable plate material by extrusion, wherein the mold step forms a plurality of grooves in the mixture extruded into the form of the plate material through a plurality of wire inserts disposed at predetermined intervals in the extrusion mold part. It may be characterized by further comprising a wire insertion step of inserting a natural fiber wire into each of the plurality of grooves while doing so.

As an example related to the present invention, the manufacturing method of the biodegradable plate material using hemp, before the pellet manufacturing step, by grinding hemp stems to 160 mesh or more through a grinder to prepare the hemp powder It may be characterized in that it further includes.

As an example related to the present invention, the additive may be characterized in that it includes at least one or more of a vegetable wax, an antioxidant, a complex mineral, and an antibacterial material.

As an example related to the present invention, in the mixing step, the plurality of heating sections are mixed while mixing the pellets and the PLA resin in each of the plurality of heating sections through a mixer having a plurality of heating sections set at different temperatures. It may be characterized in that the pellets and the PLA resin to be mixed are heated to different temperatures by using.

As an example related to the present invention, the plurality of heating sections heats the pellets and the PLA resin to be mixed to the lowest temperature in the first heating section, and then heats them to a higher temperature than the previous heating section in each next heating section, corresponding to the last It may be characterized in that it is formed to heat to the highest temperature in the heating section.

As an example related to the present invention, the lowest temperature may be 90 °C and the highest temperature may be 140 °C.

As an example related to the present invention, the extruding step may be characterized by extruding while heating the mixture to 150 ° C. to 190 ° C. through the extruder.

As an example related to the present invention, the wire insertion step is spaced apart at predetermined intervals in the width direction of the mixture to be extruded into the plate form through the plurality of wire insertion parts in the longitudinal direction of the mixture to be extruded into the plate form. It may be characterized in that a plurality of grooves are formed in the mixture extruded in the form of the plate material so that grooves are formed, and natural fiber wires are inserted into each of the plurality of grooves.

As an example related to the present invention, the natural fiber wire may be characterized in that it is manufactured using hemp stems.

As an example related to the present invention, in the method for manufacturing a biodegradable plate material using hemp, a plate material composition, which is a mixture extruded in the form of the plate material through the mold step, through a roller press unit composed of a plurality of rollers, is mixed with the plurality of rollers. It may be characterized in that it further comprises the step of manufacturing the biodegradable plate material by pressing through the plurality of rollers while passing between them.

The present invention provides a biodegradable plate prepared by using a mixture of a mixture of a fillet produced from hemp stems and a PLA resin, while heating the mixture while gradually increasing the temperature at a temperature at which the hemp stems do not burn during the mixing process to achieve biodegradability. By manufacturing a biodegradable board with a mixture in which the cellulose that can be increased is preserved, the biodegradability of the biodegradable board can be greatly improved, and natural fiber wires are added to the biodegradable board during the extrusion process during the manufacturing process of the biodegradable board. By inserting and extruding, it is possible to increase the physical properties, tensile strength, and strength of the biodegradable plate material, and thus, there is an effect of providing a biodegradable plate material that can replace general plastics and guarantees high durability and quality.

1 is an exemplary view of a method for manufacturing a biodegradable plate material using hemp according to an embodiment of the present invention.
Figure 2 is a flow chart of a method for manufacturing a biodegradable plate material using hemp according to an embodiment of the present invention.
Figure 3 is an exemplary view of the manufacturing process of the biodegradable plate material into which the natural fiber wire is inserted according to an embodiment of the present invention.

Hereinafter, detailed embodiments of the present invention will be described with reference to the drawings.

1 is an exemplary view of a method for manufacturing a biodegradable plate material using hemp according to an embodiment of the present invention, Figure 2 is a flow chart of a method for manufacturing a biodegradable plate material using hemp according to an embodiment of the present invention.

As shown, cannabis powder can be prepared by pulverizing hemp stems to 160 mesh or more through a grinder (S1).

At this time, hemp (大麻) has the scientific name Cannabis sativa L., and its straight roots extend to 30-40 cm underground, but its side roots do not develop vigorously, so it is well picked. grows up to 6m in

In addition, the stems of these hemp, which are used as materials for the biodegradable plate material in the present invention, are vertically ribbed, and bast fibers, which are natural fibers, are formed in the parenchyma, and these bast fibers are biodegradable. It contains cellulose that can be accelerated.

In addition, it is possible to prepare a pellet (pellet) by mixing hemp powder and additives through a pellet maker (S2).

At this time, the pellet maker, while mixing the hemp powder and additives, can produce circular pellets by compression processing to a thickness of 10 mm.

In this way, by mixing the hemp powder with additives to make a fillet, it can be mixed better in the PLA resin and mixer 110 described below.

In addition, the additive may include at least one or more of vegetable wax, antioxidant, complex mineral, and antibacterial material.

Here, the vegetable wax makes hemp and PLA resin well mixed, the antioxidant can prevent the hemp powder from burning, the complex mineral is a material for accelerating biodegradation, and the antibacterial material is a material for antibacterial am.

Thereafter, a mixture may be prepared by heating the pellets while mixing with the PLA resin through the mixer 110 (S3).

At this time, the PLA (Poly Lactic Acid) resin described in the present invention is a biodegradable plastic produced by polymerizing lactic acid obtained by extracting starch from plants such as corn or sugar cane and then fermenting it. It is used to solve problems and prevent environmental pollution.

In addition, the PLA resin may be configured in the form of granules, and a plurality of pellets and a plurality of PLA resins are put into the mixer 110, and the plurality of pellets and the plurality of PLA resins through the mixer 110 The mixture may be prepared by mixing.

At this time, the mixer 110 may have a plurality of screws therein to mix the pellets and the PLA resin through the plurality of screws.

In the above configuration, when the pellet is heated to a high temperature from the beginning in the process of heating while mixing with the PLA resin through the mixer 110, a problem of burning hemp may occur, and when hemp is burned, biodegradation There is a problem of disappearing cellulose that can accelerate the process.

To solve this problem, the mixer 110 may include a plurality of heating sections in which different temperatures are set.

Accordingly, while mixing the pellets and the PLA resin in each of the plurality of heating sections through the mixer 110, the mixed pellets and the PLA resin sequentially pass through the plurality of heating sections according to the arrangement order of the plurality of heating sections. It passes through, and the pellets and the PLA resin to be mixed can be heated to different temperatures using the plurality of heating sections.

For example, the plurality of heating sections configured in the mixer 110 heats the mixed pellets and the PLA resin to the lowest temperature in the first heating section, then heats them to a higher temperature than the previous heating section in each next heating section, and finally It may be formed to be heated to the highest temperature in the corresponding heating section.

In this case, the lowest temperature may be 90 °C and the highest temperature may be 140 °C.

For example, among the plurality of heating sections, the first heating section is 90 ° C, the second heating section is 95 ° C, the third heating section is 100 ° C, the fourth heating section is 110 ° C, and the fifth heating section is It may be 140°C.

Through this, the mixer 110 heats the mixed pellets and the PLA resin from 90 ° C through the first heating section while mixing the pellets and the PLA resin through the plurality of heating sections, and then the temperature is higher than the first heating section. The mixed pellets and the PLA resin may be heated to a higher temperature than the first heating section through the next heating section having a high temperature difference with the first heating section (smallest).

Accordingly, the mixer 110 heats the pellets and the PLA resin mixed in the mixer 110 while gradually increasing the temperature through a plurality of heating sections, thereby mixing the pellets prepared using hemp powder with PLA. In the process of heating while heating, the pellets can be easily mixed with the PLA resin by preventing the pellets from burning, and the cellulose component contained in the pellets produced based on hemp stems can be preserved as much as possible.

In addition, the mixer 110 may discharge a mixture of the pellets and the PLA resin that have passed through the plurality of heating sections, and inject the mixture into the extruder 120 .

Meanwhile, when the mixture is prepared, the mixture may be extruded while heating through the extruder 120 (S4).

At this time, the extruder 120 may extrude the mixture while heating it to 150 ° C. to 190 ° C., and through this, the strength of the finally manufactured biodegradable plate material may be increased.

In addition, in the extrusion part configured in the extruder 120 to discharge the extruded mixture from the extruder 120, an extrusion mold part for extruding and discharging the extruded mixture in a preset form ( 130) may be formed.

Accordingly, the extrusion mold unit 130 may manufacture a biodegradable plate material by extruding the mixture extruded through the extruder 120 in a preset plate shape (S5).

However, when processed only in the form of a simple plate, the strength, tensile and physical properties of the biodegradable plate may not be sufficient depending on the target of use, and the present invention provides a method for supplementing the strength, tensile and physical properties of the biodegradable plate .

To this end, an additional configuration of a method for manufacturing a biodegradable plate material using hemp according to an embodiment of the present invention will be described with reference to FIG. 3 .

As shown, the extrusion mold unit 130 may include a plurality of insertion parts disposed at predetermined intervals.

Accordingly, the plurality of wire insertion units 131 can insert the natural fiber wire 200 into each of the plurality of grooves while forming a plurality of grooves in the mixture extruded in the form of the plate material, and inserting the plurality of wires into the plurality of grooves. While the plurality of grooves are formed through the portion 131, a biodegradable plate material in which the natural fiber wire 200 is inserted into each of the plurality of grooves can be manufactured (S5).

At this time, the natural fiber wire 200 may be manufactured using hemp stems, and may be extracted from hemp stems as an example.

As an example of the above-described configuration, through the plurality of wire insertion parts 131, grooves are spaced apart at predetermined intervals in the width direction of the mixture to be extruded into the plate form in the longitudinal direction of the mixture to be extruded into the plate form. A plurality of grooves may be formed in the mixture extruded in the form of the plate material, and the natural fiber wire 200 may be inserted into each of the plurality of grooves.

To this end, the plurality of wire insertion parts 131 may be spaced apart at predetermined intervals in the width direction of the extrusion mold part 130, and receive the natural fiber wire 200 from the outside into the groove. The natural fiber wire 200 may be inserted.

In the above configuration, the method for manufacturing a biodegradable plate material using hemp according to an embodiment of the present invention is such that the natural fiber wire 200 formed in the groove of the biodegradable plate material can be more strongly fixed to the biodegradable plate material. Additional steps may be provided for

For example, through a roller press unit 140 composed of a plurality of rollers, the sheet material composition, which is a mixture extruded in the form of a sheet material through the extrusion mold unit 130, is passed between the plurality of rollers. It is possible to manufacture a biodegradable plate by pressing through the plurality of rollers (S6, S7).

Through such a pressing process through the roller press unit 140, a plurality of surfaces constituting the groove formed in the biodegradable plate material are compressed to the natural fiber wire 200 inserted into the groove (natural fiber wire 200 ), so that the natural fiber wire 200 is strongly fixed to the biodegradable plate material.

In addition, through the roller press unit 140, it is possible to flatten the biodegradable plate material to a preset thickness while filling the groove formed in the biodegradable plate material.

Through the above configuration, the present invention can provide a biodegradable plate material in which a plurality of natural fiber wires 200 respectively configured (inserted) into a plurality of grooves formed in the biodegradable plate material are strongly fixed to the biodegradable plate material. Through this, the strength, tensile and physical properties of the biodegradable plate can be improved.

As described above, the present invention provides a biodegradable plate prepared by using a mixture of a mixture of a fillet produced from hemp stems and a PLA resin, while gradually increasing the temperature at a temperature at which the hemp stems do not burn during the mixing process, By preparing a biodegradable board with a mixture in which cellulose, which can be heated to increase biodegradability, is preserved, the biodegradability of the biodegradable board can be greatly improved, and in the extrusion process during the manufacturing process of the biodegradable board, the biodegradable board By inserting and extruding a natural fiber wire into the biodegradable plate material, it is possible to increase the physical properties, tensile strength and strength of the biodegradable plate material, thereby providing a biodegradable plate material that can replace general plastics and guarantees high durability and quality.

The foregoing may be modified and modified by those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention, but to explain, and the scope of the technical idea of the present invention is not limited by these embodiments. The protection scope of the present invention should be construed according to the claims below, and all technical ideas within the equivalent range should be construed as being included in the scope of the present invention.

110: mixer 120: extruder
130: extrusion mold part 131: wire insertion part
140: roller press unit 200: natural fiber wire

Claims (10)

Using a grinder, pulverizing hemp stems to 160 mesh or more to produce hemp powder;
The hemp powder, a vegetable wax for improving mixability, a complex mineral for accelerating biodegradation, an antibacterial material for antibacterial, and an antioxidant to prevent the hemp powder from burning during high-temperature processing to maintain cellulose for biodegradation. A pellet manufacturing step of preparing pellets by mixing additives through a pellet maker;
Through a mixer having a plurality of heating sections sequentially set from a low temperature of 90 ° C. to a high temperature of 140 ° C., the pellets and vegetable starch-derived PLA (Poly Lactic Acid) resin are gradually heated using the plurality of heating sections. Mixing while raising the temperature, mixing the pellets and the PLA resin are started at a low temperature and heated to a higher temperature as the mixing proceeds to prepare a mixture in a state in which the cellulose of the pellets is preserved;
Extrusion step of extruding while heating the mixture to 150 ℃ ~ 190 ℃ through an extruder; and
A mold step of manufacturing a biodegradable plate by extruding the extruded mixture in a preset plate form through an extrusion mold formed in an extrusion part of the extruder through which the extruded mixture is discharged,
In the mold step, a plurality of grooves are formed in the mixture extruded in the form of a plate material through a plurality of wire insertion portions arranged at predetermined intervals in the extrusion mold portion to match the wire insertion portion of the extrusion mold portion, while the plurality of grooves are formed. Method for producing a biodegradable plate material using hemp further comprising a wire insertion step of inserting a natural fiber wire for each.
delete delete delete delete delete delete The method of claim 1,
The wire insertion step,
Through the plurality of wire inserts, a plurality of mixtures extruded into the plate form are spaced at predetermined intervals in the width direction of the mixture extruded into the plate form, and grooves are formed in the longitudinal direction of the mixture extruded into the plate form. A method for producing a biodegradable plate material using hemp, characterized in that forming a groove, and inserting a natural fiber wire into each of the plurality of grooves.
The method of claim 1,
The natural fiber wire is a method for producing a biodegradable plate material using hemp, characterized in that produced using hemp stems.
The method of claim 1,
Through a roller press unit composed of a plurality of rollers, manufacturing the biodegradable plate material by pressing through the plurality of rollers while passing the plate composition, which is a mixture extruded in the form of the plate material through the mold step, between the plurality of rollers. Method for producing a biodegradable plate material using hemp, characterized in that it further comprises.

Images