WO2012091352A2

WO2012091352A2 - Composition for manufacturing artificial wisteria stem and method for manufacturing artificial wisteria stem

Info

Publication number: WO2012091352A2
Application number: PCT/KR2011/009871
Authority: WO
Inventors: 김완식; 김용태
Original assignee: Kim Wan Sik; Kim Yong Tae
Priority date: 2010-12-29
Filing date: 2011-12-20
Publication date: 2012-07-05
Also published as: KR101032161B1; WO2012091352A3

Abstract

The present invention relates to a composition for manufacturing an artificial wisteria stem, a method for manufacturing an artificial wisteria stem, and an artificial wisteria stem manufactured thereby, and more specifically, to a composition for manufacturing an artificial wisteria stem that comprises a binder for stretch-reform for natural vegetable powder and synthetic resin to be mixed well. Also, the present invention relates to a method for manufacturing an artificial wisteria stem and an artificial wisteria stem manufactured thereby, the method for manufacturing artificial wisteria stem that surface-treats the natural vegetable powder with the binder for stretch-reform so as to mix evenly with the synthetic resin, and forms external protrusion on one surface of a base material when manufacturing the composition for manufacturing artificial wisteria stem into a film-type base material. The artificial wisteria stem of the present invention has superior water resistance, corrosion resistance, durability, weather resistance, permeability, and flame resistance compared to natural materials such as reed, rush, wisteria, and bamboo tree, or synthetic resin materials. Also, the present invention is environmentally friendly, thereby generating no harmful substance, and in particular, has excellent anti-bacterial effects, and shows excellent natural texture. Also, the method for manufacturing an artificial wisteria stem of the present invention provides an artificial wisteria stem that reduces manufacturing cost by reducing the weight of the product, therefore being economical, and has an enhanced processability.

Description

Composition for manufacturing artificial rattan stem and method of manufacturing artificial rattan stem

The present invention relates to a composition for preparing artificial rattan stems, artificial rattan stem manufacturing method and the artificial rattan stem accordingly that can be used as a material for furniture in tropical climates.

In general, natural materials such as reeds, royal valleys, rattans, and bamboos are used for the equivalent furniture in tropical climates.

However, these natural materials are easily discolored and decayed, become habitats such as mites and pests, and have a high risk of fire as well as easy sparking in case of fire.

In addition, natural materials are not easy to procure because they have a weak water resistance and durability, and are only used for a year or two and are affected by seasons. In addition, maintenance is difficult and there are problems in that weather resistance, resilience, cushioning and the like are falling.

The present invention aims to provide a composition for preparing artificial rattan stems, including a binder for stretching modification, so that natural vegetable powder and synthetic resin are well blended.

The present invention is to provide a method of manufacturing artificial rattan stem and the artificial rattan stem according to the surface treatment of the natural vegetable powder with a binder for modifying the yarn to be uniformly blended with the synthetic resin.

The present invention provides a method of manufacturing artificial rattan stems through which the outer projection is formed on one side of the substrate by passing through the T-die provided with grooves in the die lip when pelletizing the composition for manufacturing artificial rattan stems and the film-like substrate To provide artificial rattan trunks.

The present invention can be used as a material for furniture in tropical climates, artificial rattan stems excellent in water resistance, corrosion resistance, durability, weather resistance, breathability, flame retardancy compared to natural or synthetic resin materials such as reed, royal, rattan, bamboo To provide a composition, artificial rattan stem manufacturing method and artificial rattan stem accordingly.

In addition, the present invention is to provide an artificial rattan stem composition, artificial rattan stem manufacturing method and artificial rattan stem according to the environment-friendly and environmentally friendly, no harmful substances generated, excellent antibacterial action, excellent natural texture. .

In addition, the manufacturing cost is reduced and the manufacturing cost is reduced and the processability of the artificial rattan stem manufacturing method, artificial rattan stem manufacturing method and the artificial rattan stem according to the light weight of the product is improved.

Accordingly, the present invention is a preferred first embodiment, 36 to 83% by weight of at least one synthetic resin selected from the group consisting of polypropylene, high density polyethylene and polyethylene terephthalate; 13 to 35% by weight of one or more natural vegetable powders selected from the group consisting of mulberry bark, corn, hemp and cocoa palms; 1.0 to 8.0 wt% binder for stretching modification; And additives 3 to 21% by weight.

In the composition for preparing artificial rattan stem according to the embodiment, the additive is 1.0 to 10% by weight of one flame retardant selected from the group consisting of red, inorganic phosphate, halogen-containing acid and nitrogen-containing phosphate ester based on the total weight of the composition; 0.1 to 1.0% by weight of a primary antioxidant, which is pheyiene amine or semi hindered phenole; 0.1 to 0.5% by weight of a secondary antioxidant, which is a phosphonite-based or thioether-based; 0.3 to 1.0% by weight of a light stabilizer that is a hindered amine or organic nickel; 0.3 to 1.0 wt% of a benzophenone-based or triamine-based ultraviolet absorbent; 0.5 to 3.0% by weight of a processing aid which is one or a mixture of two or more selected from the group consisting of stearic acid, paraffin wax, crystalline wax and low molecular weight polyethylene wax; 0.2 to 2.0% by weight of a lubricant which is one selected from oleic acid amide, polyethylene wax and fatty acid amide; And inorganic pigments 0.5 to 2.5% by weight; to provide a composition for preparing artificial rattan stem comprising.

In the artificial rattan stem manufacturing composition according to the embodiment, the synthetic resin provides a melt composition of 2.0 to 20, elongation at break of 200 to 500%, flexural modulus of 9,000 to 13,000 kg / cm2 artificial rattan stem composition.

In the artificial rattan stem manufacturing composition according to the embodiment, the synthetic resin may have a heat deformation temperature of 80 to 120 ℃, softening point 140 to 170 ℃.

In the composition for preparing artificial rattan stem according to the embodiment, the natural plant powder may have an average particle size of 100 to 250 mesh.

In the composition for preparing artificial rattan stem according to the embodiment, the natural plant powder may have a water content of 3% or less.

In the composition for preparing artificial rattan stem according to the above embodiment, the binder for stretching modification is zirconium IV 2,2 (bis-2 propenolatatomethyl) butanolato tris (dioctyl) phosphato-O (Zirconium IV 2,2 (bis- Zirconium IV tetrakis (2,2bis propenolato methyl) butanolato bis tridecyl hydrogen phosphite And maleated polypropylene (MAPP) may be one or a mixture of two or more selected from the group consisting of.

In addition, the present invention is a second preferred embodiment, (S1) drying at least one natural plant powder selected from the group consisting of bark, corn, hemp and cocoa palm bark; (S2) surface treatment of the natural plant powder by mixing the dried natural plant powder and the binder for stretching modification; (S3) primary blending step of kneading the surface-treated natural vegetable powder and at least one synthetic resin selected from the group consisting of polypropylene, high density polyethylene and polyethylene terephthalate; (S4) secondary blending step of kneading the additive in the primary blend; (S5) pellet production step of pelletizing the secondary blend; (S6) heat-melting the prepared pellets at 180 to 220 ° C., and extruding the pellets while cooling and solidifying them to prepare a film-like substrate; (S7) stretching the prepared film-like substrate; (S8) provides a method of manufacturing artificial rattan stem comprising the step of melting the surface of the prepared stretched film to produce a surface layer.

In the artificial rattan stem manufacturing method according to the embodiment, the (S1) step is the first drying step of drying so that the moisture content of the natural vegetable powder at 90 ~ 120 ℃ less than 5% by weight; And a second drying step of drying the water content of the natural plant powder at 100 to 140 ° C. to be less than 3 wt%.

In the artificial rattan stem manufacturing method according to the embodiment, (S2) step may be performed for 7 to 10 minutes at 55 to 65 ℃.

In the artificial rattan stem manufacturing method according to the embodiment, (S3) step may be performed for 5 to 10 minutes at 100 to 120 ℃.

In the artificial rattan stem manufacturing method according to the embodiment, the additive of step (S4) is selected from the group consisting of flame retardants, primary antioxidants, secondary antioxidants, light stabilizers, ultraviolet absorbers, processing aids, lubricants and inorganic pigments. Species or a mixture of two or more thereof.

In the artificial rattan stem manufacturing method according to the embodiment, (S4) step may be performed for 7 to 15 minutes at 120 to 140 ℃.

In the artificial rattan stem manufacturing method according to the embodiment, the secondary blend in step (S5) may be to be pelletized by molding at 150 to 180 ℃.

In the artificial rattan stem manufacturing method according to the embodiment, the pellet in the step (S5) may be an average length of 2 to 3mm.

In the artificial rattan stem manufacturing method according to the embodiment, the step (S6) may be performed by using an extruder having a ratio (L / D) of length and diameter of 30 to 34, the compression ratio of 4 to 5.

In the artificial rattan stem manufacturing method according to the embodiment, the step (S6) is to pass through the T-Die (T-Die) installed 400 to 1000 grooves in the die lip before the solidification of the pellet after heating and melting Can be.

In the artificial rattan stem manufacturing method according to the embodiment, the draw ratio in step (S7) may be 3 to 10 times.

In the artificial rattan stem manufacturing method according to the embodiment, the stretched film in step (S8) may be 10,000 ~ 80,000 denier in thickness.

The present invention provides a artificial rattan stem having an average diameter of 4.0 to 10 mm manufactured according to the artificial rattan stem manufacturing method as a preferred third embodiment.

The present invention relates to artificial rattan stem composition, artificial rattan stem manufacturing method and artificial rattan stem according to the above, and in particular to the composition for artificial rattan stem comprising a natural vegetable powder and synthetic resin well blended including a binder for stretching modification It is about. In addition, the present invention is the artificial rattan stem surface treatment of the natural vegetable powder with a binder for modifying the yarn to be uniformly blended with the synthetic resin, and to form an external protrusion on one side of the substrate when the composition for preparing artificial rattan stems into a film-type substrate The manufacturing method and the artificial rattan stem accordingly.

Artificial rattan stem according to the present invention is excellent in water resistance, corrosion resistance, durability, weather resistance, breathability, flame retardant and the like compared to natural or synthetic resin materials such as reed, royal, rattan, bamboo. In addition, it is environmentally friendly, no harmful substances are generated, in particular, the antibacterial effect is excellent, showing an excellent natural texture.

In addition, according to the artificial rattan stem manufacturing method of the present invention can reduce the manufacturing cost by reducing the weight of the product can provide an economical, improved artificial rattan stem.

1 is a flowchart showing a method for manufacturing artificial rattan stem according to an embodiment of the present invention.

Figure 2 is a photograph of the equivalent furniture processed with conventional natural materials.

Hereinafter, the present invention will be described in more detail.

The present invention, first, 36 to 83% by weight of at least one synthetic resin selected from the group consisting of polypropylene, high density polyethylene and polyethylene terephthalate; 13 to 35% by weight of one or more natural vegetable powders selected from the group consisting of mulberry bark, corn, hemp and cocoa palms; 1.0 to 8.0 wt% binder for stretching modification; And additives 3 to 21% by weight.

The synthetic resin in the composition preferably has a melt melt index of 2.0 to 20, an elongation at break of 200 to 500%, a flexural modulus of 9,000 to 13,000 kg / cm2, a heat deformation temperature of 80 to 120 ° C, and a softening point of 140 to It is preferable that it is 170 degreeC.

In addition, the at least one natural vegetable powder selected from the group consisting of mulberry bark, corn, hemp and cocoa palm in the composition has an average particle size of 100 to 250 mesh, the moisture content is 3% or less of the harmful substances well It is preferable because it does not occur and has antibacterial properties.

In addition, the binder for stretching modification may not only strengthen the binding force between the synthetic resin and the natural vegetable powder, but also improve rigidity, facilitate stretching for lightening, and facilitate dispersion of the natural vegetable powder. Zirconium IV 2,2 (bis-2 propenolatatomethyl) butanolato tris (dioctyl) phosphato-O (Zirconium IV)

2,2 (bis-2propenolato methyl) butanolato tris (dioctyl) phosphato-O), zirconium IV tetrakis One or more mixtures selected from the group consisting of butanolato bis tridecyl hydrogen phosphite) and maleated polypropylene (MAPP) are preferred.

In addition, the additive is preferably one or a mixture of two or more selected from the group consisting of flame retardants, antioxidants, light stabilizers, ultraviolet absorbers, processing aids, lubricants and inorganic pigments.

Preferably, the additive is 1.0 to 10% by weight of one flame retardant selected from the group consisting of red, inorganic phosphate, halogen-containing and nitrogen-containing phosphate esters based on the total weight of the composition; 0.1 to 1.0% by weight of a primary antioxidant, which is pheyiene amine or semi hindered phenole; 0.1 to 0.5% by weight of a secondary antioxidant, which is a phosphonite-based or thioether-based; 0.3 to 1.0% by weight of a light stabilizer that is a hindered amine or organic nickel; 0.3 to 1.0 wt% of a benzophenone-based or triamine-based ultraviolet absorbent; 0.5 to 3.0% by weight of a processing aid which is one or a mixture of two or more selected from the group consisting of stearic acid, paraffin wax, crystalline wax and polyethylene wax; 0.2 to 2.0% by weight of a lubricant which is one selected from oleic acid amide, polyethylene wax and fatty acid amide; And 0.5 to 2.5% by weight of an inorganic pigment.

At this time, the primary antioxidant is to prevent the influence of heat (deterioration) that the composition of the present invention can be received in the process of manufacturing artificial rattan stem. That is, it is possible to prevent the molecules from being cut due to deterioration, leading to the deterioration of physical properties caused by the molecular weight decrease.

In addition, the secondary antioxidant serves as a secondary role of the primary antioxidant, can impart processing stability to heat, and can act as a color tone improver.

The light stabilizer contributes to the light stabilization of the artificial rattan stem processed with the composition of the present invention, does not absorb ultraviolet rays, functions as a trapping agent of radicals by light and prevents photoaging.

The ultraviolet absorber absorbs ultraviolet rays and converts them into isomers, thereby converting light energy having high energy into thermal energy, thereby inhibiting radical generation and preventing photoaging.

In addition, the processing aid prevents the viscosity of the composition from decreasing during the manufacturing process of artificial rattan stems, minimizes friction on the metal surface to prevent internal heat generation, and facilitates the flow of raw materials as well as excessive organic matter. It serves to prevent deterioration in heat resistance and flame resistance.

In addition, the lubricant helps to uniformly disperse the flame retardant when mixing the raw materials, increases the mechanical properties such as tensile strength, elongation rate, and serves to smooth the flow of the raw materials.

The artificial rattan stem manufacturing composition of the present invention described above is excellent in water resistance, corrosion resistance, durability, weather resistance, breathability, flame retardancy, etc., compared to natural materials, and environmentally friendly, so no harmful substances are generated, and in particular, the antibacterial effect is excellent as well. It is possible to provide an artificial rattan stem exhibiting excellent natural texture.

Next, the present invention comprises the steps of drying at least one natural plant powder selected from the group consisting of (S1) mulberry bark, corn, hemp and cocoa palm; (S2) surface treatment of the natural plant powder by mixing the dried natural plant powder and the binder for stretching modification; (S3) primary blending step of kneading the surface-treated natural vegetable powder and at least one synthetic resin selected from the group consisting of polypropylene, high density polyethylene and polyethylene terephthalate; (S4) secondary blending step of kneading the additive in the primary blend; (S5) pellet production step of pelletizing the secondary blend; (S6) heat-melting the prepared pellets at 180 to 220 ° C., and extruding the pellets while cooling and solidifying them to prepare a film-like substrate; (S7) stretching the prepared film-like substrate; (S8) provides a method of manufacturing artificial rattan stem comprising the step of melting the surface of the prepared stretched film to produce a surface layer.

First, in step (S1), one or more natural plant powders selected from the group consisting of bark of bark, corn, hemp and cocoa palm are dried. The powder is preferably 100 to 250 mesh in average particle size, and preferably dried to have a water content of 3% or less. If the moisture content of the natural plant powder is high, there is a problem that can not be uniformly kneaded with the synthetic resin to be described later. In addition, when the moisture content is high, it may be difficult to continuously proceed the process due to the static electricity generated in the natural vegetable powder in the first kneading step, the second kneading step or the pelletization step. In this case, not only the physical properties of the artificial rattan stem is manufactured, but also a problem that the failure rate may increase.

Specific examples of the method of drying the content of the natural plant powder to be less than 3% by weight as the first drying step and 100 ~ to dry the natural vegetable powder to a water content of less than 5% by weight at a temperature of 90 ~ 120 ℃ There is a method of going through a secondary drying step of drying so that the water content is less than 3% by weight at a temperature of 140 ℃. Here, although not particularly limited, the first drying step is preferably performed on the tunnel-type closed conveyor belt of 90 ~ 120 ℃, the second drying step is preferably performed for 7-15 minutes in a blender of 100 ~ 140 ℃. Do. The reason for this two-step drying step is that the initial moisture content of the natural vegetable powder is 12-15%. In a tunnel-type closed conveyor belt dryer, it is not only possible to lower the moisture content by 3% at a time, but even if it is well sealed Because it penetrates. Desirable drying equipment to be used in the secondary drying step is preferably a structure that can automatically control the heat from the outside as a blender having a heating function therein. This drying facility can be completely mixed with the impeller, so that the natural vegetable powder of the outside and the inside can be uniformly dried.

In the step (S2), 13 to 35% by weight of the natural vegetable powder and 1 to 8% by weight of the binder for stretching modification are mixed with the total weight of the composition for preparing artificial rattan stem, and the surface is treated with the natural vegetable powder.

As such, the reason why the surface treatment of the natural vegetable powder with the binder for stretching modification is that the natural vegetable powder and the synthetic resin have weak bonding strength, but the binder for stretching modification is well absorbed into the pores of the natural vegetable powder. That is, when the binder is first bonded to the surface and the pores of the non-natural vegetable powder, not only the binding strength with the synthetic resin can be increased, but the natural vegetable powder can be evenly dispersed in the synthetic resin.

In addition, the binder for stretching modification is zirconium IV 2,2 (bis-2propenolatomethyl) butanolato tris (dioctyl) phosphato-O (Zirconium IV 2,2 (bis-2propenolatomethyl) butanolato tris (dioctyl) phosphato- O), Zirconium IV tetrakis (2,2bis propenolato methyl) butanolato bis tridecyl hydrogen phosphite, butanolato bis tridecyl hydrogen phosphite and maleated polypropylene ( MAPP) is preferably one or a mixture of two or more selected from the group consisting of. The binder for stretching modification may not only strengthen the binding strength of the synthetic resin and the natural vegetable powder to be mixed later, but also improve rigidity and facilitate stretching for weight reduction. In addition, it serves to help the dispersion of the natural plant powder, it is possible to prevent the material from being torn in the subsequent stretching step, it can be stretched to a uniform thickness.

In order to surface-treat the natural plant powder by mixing the natural plant powder and the binder for extension reforming, it is preferable to use a special stirrer capable of controlling the temperature to 65 ° C. or less and allowing the impeller to rotate at high speed. This is because the stretch modifying binder may be volatilized at a temperature of 70 ° C. or higher. In addition, in order to surface-treat the natural vegetable powder by mixing the two substances, put the natural vegetable powder and the binder for modifying the stretching in the special stirrer and rotate the impeller for 7-10 minutes at low speed-> high speed-> low speed. It is preferable to stir while differently. At this time, the special stirrer is attached to the impeller capable of uniformly mixing the natural vegetable powder and the binder for stretching modification, it is preferable that the rotation speed can be changed from low speed to high speed, high speed to low speed. In addition, it is preferable that the natural vegetable powder and the binder for extension reforming have a structure capable of circulating the outside of the stirrer with cooling water so that the temperature does not exceed 65 ° C. due to the heat generated during the high speed rotation of the impeller during stirring.

(S3) step is 14 to 43% by weight of the surface-treated natural vegetable powder and 36 to 83% by weight of at least one synthetic resin selected from the group consisting of polypropylene, high density polyethylene and polyethylene terephthalate, based on the total weight of the composition for preparing artificial rattan stems It is a primary compounding step of kneading.

The synthetic resin resin melt index is 2.0 to 20, elongation at break is 200 to 500%, yield point tensile strength is 300 to 500kg / cm2, flexural modulus is preferably 9,000 to 13,000kg / cm2. In addition, it is preferable that heat distortion temperature is 80-120 degreeC, and a softening point is 140-170 degreeC.

In addition, the surface-treated natural plant powder and synthetic resin is preferably added to the super mixer and kneaded for 5 to 10 minutes at a temperature of 100 to 120 ℃.

In addition, (S4) step is a secondary blending step of kneading the additive 3 to 21% by weight based on the total weight of the composition for preparing artificial rattan stem in the primary blend. At this time, the additive is flame retardant 1.0 to 10% by weight, primary antioxidant 0.1 to 1.0% by weight, secondary antioxidant 0.1 to 0.5% by weight, light stabilizer 0.3 to 1.0% by weight, ultraviolet absorber 0.3 based on the total weight of the composition for preparing artificial rattan stem To 1.0 wt%, 0.5 to 3.0 wt% processing aid, 0.2 to 2.0 wt% lubricant, and 0.5 to 2.5 wt% inorganic pigment.

The kneading in the step (S4) is added to the super blender additives such as the flame retardant, the primary antioxidant, the secondary antioxidant, the light stabilizer, the ultraviolet absorber, the processing aid, the lubricant and the inorganic pigment in a super blender and 120 to 140 Preference is given to carrying out 7 to 15 minutes at < RTI ID = 0.0 > As such, through the step (S4), a gel-like synthetic raw material is prepared. On the other hand, the description of the additives is dedicated to the above contents.

As described above, the reason for separating the blending step into the first blending step and the second blending step is because the binder for stretching modification coating the natural vegetable powder in the step (S2) is an additive for increasing the binding strength of the synthetic resin and natural plant powder This is because, when mixing the synthetic resin and the additive added in the second compounding step together with the surface-treated natural vegetable powder, the combination of the synthetic resin and the natural vegetable powder may be prevented. If the compounding step is not separated, the physical properties of the artificial rattan stems produced by lowering the binding strength of the natural vegetable powder and the synthetic resin are reduced, and the uniform dispersion of the natural vegetable powder is difficult. Extrusion amount may change during the stretching step or uniform stretching may be a cause of mass defects.

In step (S5) the pellets are prepared by pelletizing the secondary blend. The pellets are preferably manufactured by molding the secondary compound in a pellet-only molding machine with a vacuum apparatus heated to 150 to 180 ° C., cutting the pellets into granules having a length of 2 to 3 mm, and then cooling them by an air-cooled cooling method.

The reason for the pellet manufacturing step as described above is because the specific gravity of the natural vegetable powder is three times or more than that of the synthetic resin, even if uniformly kneaded in the first and second blending step, it is difficult to be uniform. If the natural vegetable powder and the synthetic resin are not uniformly kneaded, not only the physical properties but also the surface deterioration of the product, color unevenness, etc. can be deteriorated, and in the post-manufacturing process, various unforming, surface abnormalities, uneven stretching, color unevenness, etc. Can cause problems.

In addition, in the step (S5), it is preferable to use a pellet-only molding machine with a vacuum device, and it is preferable to remove the impregnated water through the surface treatment step, the first and second compounding steps, etc. before pelletizing. Because.

Step (S6) is a step of producing a film-like substrate by extruding while heating and melting the prepared pellets to 180 to 220 ℃ solidified by cooling. Extrusion in the step (S6) is preferably performed using an extruder with a vacuum device. In addition, the extruder preferably has a ratio (L / D) of length and diameter of 30 to 34 and a compression ratio of 4 to 5. In addition, it is preferable that any one selected from an orifice, a pressure cap, and a valve is installed between the screw tip and the T-die in order to increase the kneading effect.

The pellet is preferably introduced into the extruder, heated and melted at 180 to 220 ° C., and then extruded while cooling and solidifying to produce a film-like substrate. At this time, the heat-melted pellets are of a straight manifold type before cooling and solidifying, and it is preferable to pass a T-die having a plurality of grooves (cutouts) provided on the die lip to obtain a raw film having a plot. It is preferable that the number of grooves (cutout portions) installed in the die lip is 400 to 1000. In addition, the molten pellet passed through the T-die having a plurality of grooves (cutting parts) installed on the die lip may be produced as a wide, thin, outer film-like substrate while solidifying by cooling with a water-cooled metal roller. And the film-form base material with this external protrusion (plot) can be cut out and used as needed.

If the groove portion (cutting portion) is provided in the die lip as described above, it becomes possible to produce a film-type substrate having an external protrusion (plot) in the substrate manufacturing step. If there is an external protrusion on one surface of the substrate, mechanical strength and heat resistance, such as tensile strength and impact resistance, are improved, so that it is not easily broken in a subsequent stretching step. In the surface layer generation step, even if only a constant tension is applied to the film, the surface with the outer protrusions curls inwardly well, thereby facilitating and simplifying the process, thereby increasing production efficiency.

And, the reason for using the extruder with a vacuum device in the present invention is that although the raw material is almost removed through the mixing step, pellet manufacturing step, etc., a small amount of water may remain inside the pellet, the film type Moisture in the atmosphere may have been impregnated prior to the step of preparing the substrate, to remove moisture that may occur as the pellets melt during the extrusion process. As such, if the water portion is not completely removed, there is a possibility that the physical properties and / or quality of the product may be degraded.

Step (S7) is a step of stretching the film-like substrate prepared above. Preferably, the drawing is made between two sets of rolls having different circumferential speeds, and in order to increase the drawing efficiency, a heating oven is installed between the two sets of rolls so that the film is heated to an appropriate temperature so that the film is easily stretched. desirable. At this time, it is preferable that the heating method adopts a dry color of wet (hot bath) and dry (infrared heater, thermal roll, hot plate, etc.). This is because when the wet (hot bath) is employed due to the natural vegetable powder vulnerable to the moisture contained in the composition for artificial rattan stem manufacturing, the stretching uniformity is lowered.

Then, it is preferable that the film (substrate) stretched while passing through the roll and the dry heating oven having two sets of circumferential speeds passes through the heat set machine. This is because by reducing the residual stress of the stretched film to increase the degree of crystallinity it is possible to reduce the heat shrink and to uniformly maintain the thickness of the film.

It is preferable to set the main speed of the roll so that the film shrinks by 1 to 4% during the heat set process while the temperature of the heat setter is about 5 to 15 ° C. lower than the stretching temperature.

The stretching ratio of the film in the step (S7) is about 3 to 10 times, the thickness is preferably 10,000 to 80,000 denier (denier).

The stretched film is preferably wound around a certain tension on any kind of winder such as a surface drive or a center drive.

Step (S8) is a step of melting the surface while passing the prepared stretched film through a mold having a predetermined shape to generate a surface layer.

In the step (S8) it is preferable to hang the prepared stretched film on the rewinder, so that the stretched film having an external protrusion on one surface thereof can easily pass through the mold by adjusting the tension of the tension adjusting device and the take-out machine. And, in order for the film to pass through the mold more easily, it is preferable to allow the film to pass through a heating oven of 60 to 80 ℃ before passing through the mold.

In addition, it is preferable to allow the product to pass through three to six molds whose temperature can be adjusted according to the product shape such as round, oval, flat, etc. desired by the consumer and soft or hard. Instead of forming a surface layer at a high temperature with one mold, passing 3 to 6 molds set at a higher temperature at a lower temperature can give more flexibility, cushioning, softness, and resilience to the final rattan trunk. have.

At this time, the temperature of the mold is preferably set to 170 to 250 ° C from the previous mold to sequentially increase to 10 to 40 ° C to pass the film. Based on rounding the stretched film, the inside is still in the stretched film state, and only the rounded cylindrical shape is melted while rubbing against the surface of the mold inner space as the outer surface passes through the temperature-controlled mold 504. Will be created. Accordingly, since the inside is in the stretched film state and only its surface is melted to generate a shape, the inside has flexibility, cushioning property, softness, restoring force and the like.

In addition, the cross-sectional area of the mold internal space is 1-10% smaller than the internal space cross-sectional area of the last mold based on the cross-sectional area of the final product (artificial rattan stem) required by the consumer. It is preferable to increase by 2 to 6% with respect to the internal space cross-sectional area of. The product leaving the mold is then preferably passed through an air-cooled chiller that is quenched with cold air to maintain its shape and prevent further stretching. The product (artificial rattan stem) that has passed through the mold is cooled to have a slightly larger cross-sectional area.

The reason for adopting the air-cooled quenching method is that the temperature of the last mold may melt the stretched film inside the final product, so if high heat is transferred inside, there is a concern that the flexibility, cushioning, softness and resilience of the product may be reduced. Because there is. In addition, in the case of the wet method, it is difficult to completely remove water in the wet (air-cooled) cooling method instead of wet (water cooling).

In addition, when cutting to a certain length using a cutter or when a long length is required, it is preferable to wind the winder having an inner diameter of 750 mm or more.

The artificial rattan stem produced by the above method has an average diameter of about 4.0 to 10 mm.

According to the artificial rattan stem manufacturing method as described above, the manufacturing cost is reduced and the weight of the product is economical, it is possible to provide an artificial rattan stem with improved processability.

In addition, the artificial rattan stem thus produced is excellent in water resistance, corrosion resistance, durability, weather resistance, breathability, flame retardancy, etc. compared to natural materials such as reed, royal, rattan, bamboo or synthetic resin. In addition, it is environmentally friendly, no harmful substances are generated, in particular, the antibacterial effect is excellent, showing an excellent natural texture.

Claims

36 to 83% by weight of at least one synthetic resin selected from the group consisting of polypropylene, high density polyethylene and polyethylene terephthalate;

13 to 35% by weight of one or more natural vegetable powders selected from the group consisting of mulberry bark, corn, hemp and cocoa palms;

1.0 to 8.0 wt% binder for stretching modification; And

Additives 3 to 21% by weight; Composition for artificial rattan stem comprising a.
The composition of claim 1 wherein the additive is based on the total weight of the composition

1.0 to 10% by weight of one flame retardant selected from the group consisting of red, inorganic phosphate, halogen-containing acid esters and nitrogen-containing phosphoric acid esters;

0.1 to 1.0% by weight of a primary antioxidant, which is pheyiene amine or semi hindered phenole;

0.1 to 0.5% by weight of a secondary antioxidant, which is a phosphonite-based or thioether-based;

0.3 to 1.0% by weight of a light stabilizer that is a hindered amine or organic nickel;

0.3 to 1.0 wt% of a benzophenone-based or triamine-based ultraviolet absorbent;

0.5 to 3.0% by weight of a processing aid which is one or a mixture of two or more selected from the group consisting of stearic acid, paraffin wax, crystalline wax and polyethylene wax;

0.2 to 2.0% by weight of a lubricant which is one selected from oleic acid amide, polyethylene wax and fatty acid amide; And

Inorganic pigment 0.5 to 2.5% by weight; composition comprising artificial rattan stem comprising.
The method of claim 1,

Synthetic resin has a heat deformation temperature of 80 to 120 ℃, softening point of 140 to 170 ℃ artificial rattan stem composition.
The method of claim 1,

Natural vegetable powder is a composition for preparing artificial rattan stem having an average particle size of 100 to 250 mesh.
The method of claim 1,

Natural plant powder is artificial rattan stem composition having a water content of 3% or less.
The method of claim 1,

Zirconium IV 2,2 (bis-2propenolatomethyl) butanolato tris (dioctyl) phosphato-O (Zirconium IV 2,2 (bis-2propenolatomethyl) butanolato tris (dioctyl) phosphato-O), Zirconium IV tetrakis (2,2bis propenolato methyl) butanolato bis tridecyl hydrogen phosphite and maleated polypropylene (MAPP) Composition for preparing artificial rattan stem is one or a mixture of two or more selected from the group consisting of.
(S1) drying at least one natural plant powder selected from the group consisting of bark of bark, corn, hemp and cocoa palm;

(S2) surface treatment of the natural plant powder by mixing the dried natural plant powder and the binder for stretching modification;

(S3) a primary blending step of kneading the surface-treated natural vegetable powder and at least one synthetic resin selected from the group consisting of polypropylene, high density polyethylene and polyethylene terephthalate;

(S4) secondary blending step of kneading the additive in the primary blend;

(S5) pellet production step of pelletizing the secondary blend;

(S6) heat-melting the prepared pellets at 180 to 220 ° C., and extruding the pellets while cooling and solidifying them to prepare a film type substrate;

(S7) stretching the prepared film-like substrate; And

(S8) artificial rattan stem manufacturing method comprising the step of melting the surface of the prepared stretched film to produce a surface layer.
The method of claim 8, wherein step (S1)

First drying step of drying so that the moisture content of the natural vegetable powder at 90 ~ 120 ℃ less than 5% by weight; And a secondary drying step of drying the water content of the natural vegetable powder at 100 to 140 ° C. to less than 3 wt%.
The method of claim 8,

(S2) step is artificial rattan stem manufacturing method that is carried out at 55 to 65 ℃ for 7 to 10 minutes.
The method of claim 8,

(S3) step is artificial rattan stem manufacturing method that is performed for 5 to 10 minutes at 100 to 120 ℃.
The method of claim 8,

The additive of step (S4) is flame retardant, antioxidant, light stabilizer, ultraviolet absorbent, processing aid, lubricant and inorganic pigments manufacturing method of artificial rattan stem selected from the group consisting of two or more.
The method of claim 8,

(S4) step is artificial rattan stem manufacturing method that is carried out at 120 to 140 ℃ for 7 to 15 minutes.
The method of claim 8,

The secondary blend in step (S5) is artificial rattan stem manufacturing method that is pelletized by molding at 150 to 180 ℃.
The method of claim 8,

Pellet in step (S5) the average length of 2 to 3mm artificial rattan stem manufacturing method.
The method of claim 8,

(S6) step is the ratio of the length and diameter (L / D) is 30 to 34, the artificial rattan stem manufacturing method that is performed using an extruder having a compression ratio of 4 to 5.
The method of claim 8,

Step (S6) is the artificial rattan stem manufacturing method of passing through the T-die (TDie) provided with 400 to 1000 grooves in the die lip before the heat-melting pellets and the cooling solidification.
The method of claim 8,

The draw ratio in step (S7) is 3 to 10 times artificial rattan stem manufacturing method.
The method of claim 8,

(S8) the stretched film is artificial rattan stem manufacturing method having a thickness of 10,000 ~ 80,000 denier.
Artificial rattan stem prepared according to the method of any one of claims 8 to 18, having an average diameter of 4.0 to 10 mm.