KR20170138780A - 3D printer filament and method for manufacturing thereof - Google Patents

Abstract

Disclosed is a filament for three-dimensional printers, consisting of natural wax, cacao butter, starch, soybean oil, natural colorant, and a vinyl acetate resin. According to the present invention, it is possible to produce filaments for three-dimensional printers, which are completely harmless to human body.

Description

TECHNICAL FIELD [0001] The present invention relates to a filament for a 3D printer,

The present invention relates to a filament for a 3D printer, and more particularly to a filament for a 3D printer made of natural wax, cacao butter, starch, soybean oil, natural dye and vinyl acetate resin, and a method for producing the filament.

A 3D printer is a machine that produces three-dimensional solid objects based on the drawings as if a 2D printer were printing type or drawing. The 3D printer creates solid objects based on the 3D drawings input by adding the up and down movement (z axis) on the front and back (x axis) and the left and right (y axis).

3D printers are divided into two types: stacked type (additive type or rapid prototyping method) and large cutting type (computer numerically controlled engraving method). In the laminated type, a three-dimensional shape is formed by stacking layers of powder (gypsum or nylon powder), plastic liquid or plastic yarn in a layer (layer) of 0.01 to 0.08 mm thinner than paper. The thinner the layer is, the more accurate the shape can be obtained and the coloring can proceed at the same time. The cutting type is a method of making a three-dimensional shape by carving out a large lump. Although the finished product is more accurate than the laminated type, it is a drawback that it consumes a lot of material, it is difficult to make a shape like a cup inside, and coloring work must be done separately.

The manufacturing stage consists of modeling, printing, and finishing. Modeling is the step of producing a 3D drawing, which is made using a computer aided design (3D CAD), a 3D modeling program, or a 3D scanner. Printing is a step of creating an object using the 3D drawings produced in the modeling process, and the work is carried out by stacking or cutting. The time required depends on the size and complexity of the production. Finishing is a step of complementing the produced work, such as coloring, polishing the surface, or assembling the partial work.

Plastics, metals, ceramics, biomaterials or foods are used as materials for 3D printers, and they are used in powder form, filament form, pellet form, and liquid resin form. Plastics such as nylon and polyamide are most commonly used in the form of powders or filaments because they are flexible and durable. Plastic types include alumides, acrylonitrile butadiene styrene (ABS), polylactic acid (PLA), and laywood. As the metal material, aluminum, cobalt derivatives, stainless steel, gold, silver or titanium are used in powder form. In recent years, ceramics, paper, biomaterials, or foods have been used.

Conventional 3D printer materials are harmful to the human body and cause environmental pollution by emitting a lot of harmful gas or harmful substance when processing with 3D printer. In particular, there is no material for 3D printer filament suitable for use by children or adolescents, and there is no elasticity when the 3D printer filament is manufactured using conventional chocolate, and there is a problem in that it is broken. The hopper type inlet is mounted and heated.

Disclosure of Invention Technical Problem [7] The present invention provides a 3D printer filament that does not discharge contaminants when processed into a 3D printer, and also provides a filament for a 3D printer suitable for chocolate or food ingredients.

According to an embodiment of the present invention, a filament for a 3D printer includes natural wax, cacao butter, starch, soybean oil, natural pigment, and vinyl acetate resin.

The filament for a 3D printer according to the present invention comprises 20 to 30 wt% of natural beeswax, 2 to 10 wt% of cacao butter, 2 to 10 wt% of starch, 2 to 10 wt% of soybean oil, 2 to 10 wt% % And a vinyl acetate resin in an amount of 30 to 70% by weight.

The filament for a 3D printer may further comprise at least one of stearic acid, carnauba wax, calcium hydroxide for food and aroma oil.

The 3D printer filament contains 0.5 to 5% by weight of stearic acid, 0.5 to 5% by weight of carnauba wax, 0.5 to 5% by weight of calcium hydroxide for food or 0.5 to 5% by weight of aroma oil based on the total amount of filaments for 3D printer .

The 3D printer filament can be used as a material in the manufacture of crayons by a 3D printer.

According to another embodiment of the present invention, there is provided a method for manufacturing a filament for a 3D printer, comprising heating and dissolving natural wax, cacao butter, starch, soybean oil, natural dye and vinyl acetate resin; Cooling and solidifying and dispersing the melt; Reheating and re-dissolving the dispersion; And extruding the redissolver in filament form.

According to the present invention, a 3D printer filament is provided as a food additive listed in food circulation in comparison with a conventional 3D printer material that discharges a harmful substance or gas, thereby providing a 3D printer filament that is completely harmless to the human body in the manufacture of articles by a 3D printer .

In addition, when a new 3D printer material for manufacturing crayons is provided as a 3D printer, and crayons are produced by the 3D printer material, the crayons are excellent in elasticity, so that the crayons are not broken and the coloring is more excellent. In addition, aroma oil can be added to bring aroma and psychological stabilization effects when drawing a picture with aroma-flavored crayons.

In addition, the melting point of the conventional material can be 220 ° C (± 20 ° C) and the material can be processed at 120 ° C (± 10 ° C) when outputting to a 3D printer, thus achieving energy efficiency and shortening the output time accordingly.

FIG. 1 is a flowchart illustrating a process of manufacturing a filament for a 3D printer according to an embodiment of the present invention. Referring to FIG.

Hereinafter, the present invention will be described in more detail with reference to the following examples. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings. In addition, the blending amount is expressed by weight.

In the present invention, filaments for 3D printers include natural beeswax, cacao butter, starch, soybean oil, natural dyes, and vinyl acetate resin.

The filament for a 3D printer includes 20 to 30% by weight of natural beeswax, 2 to 10% by weight of cacao butter, 2 to 10% by weight of starch, 2 to 10% by weight of soybean oil, 2 to 10% And 30 to 70% by weight of a vinyl acetate resin.

Natural beeswax is an amorphous substance that is sticky to animal solid wafers collected by honeycomb heating or solvent extraction. The main component of beeswax is palmitic acid ester of melissyl alcohol and cetric acid. Properties of beeswax have melting point 62 ~ 63 ℃, specific gravity 0.961 ~ 0.973, refractive index 1.456 ~ 1.459, saponification value 86 ~ 93, and iodine value 8 ~ 14. In the present invention, natural beeswax is edible beeswax.

Natural beeswax is an additive for the coagulation and coloring of natural pigments, which are pigments, and other additives, and serves to help uniform dispersion of the components.

Cacao butter is a fat obtained by squeezing from the nucleus of cacao fruit and contains palmitic acid, stearic acid, and oleic acid as constituents. Cacao butter has a melting point of 28 to 36 ° C, a saponification value of 190 to 200 and an iodine value of 35 to 40. The constituent fatty acids are palmitic acid, stearic acid and oleic acid.

When an article is manufactured using a 3D printer filament made of natural wax only through a 3D printer, the article becomes fragile because of its high strength. However, it is possible to prevent the breakage of the product during the manufacturing process or after the completion of the product by controlling the strength by manufacturing the product with the 3D printer containing the cacao butter, and it is possible to prevent the breakage of the product in the product manufactured with the 3D printer by containing the cacao butter, . ≪ / RTI >

Starch is a polysaccharide produced by the condensation of D-glucose (glucose), which is also called starch. It is widely present in plants with chlorophyll. When hot water is poured into starch or poured into water and heated, the starch particles expand and become a viscous liquid, that is, a paste. After that, it hardens and hardens.

Soybean oil is semisynthetic oil which is extracted from soybean (content 18 ~ 20%). Soybean is mainly used in USA, South America and most of them are milking raw materials. The main component is a mixed glyceride of linoleic acid, oleic acid, palmitic acid and linoleic acid. The crude soybean oil is yellowish brown and has an unpleasant odor, so it is refined and edible. Refined oil is pale yellow, has no odor and taste, and is consumed in the largest amount as edible oil.

The addition of soybean oil as the material of the filament for 3D printers enables smooth coloring of natural pigments during use after production and also makes the quality of the product uniform until the product is exhausted by allowing the product to contain a certain level of oil.

Natural pigment means natural pigments obtained from the same plant. In one embodiment of the present invention, the natural coloring matter includes all the natural coloring matter obtained from an animal or a plant. For example, natural pigments may be composed of strawberry powder, blueberry powder, green tea powder, gardenia powder, squid ink, purple sweet potato powder and the like. Natural pigments play a role in determining the color of the manufactured article.

Polyvinyl acetate resin is also called vinyl acetate. It is used as a coating agent (polymer) for chewing gum base agent and fruit. In addition, it is used for adhesives, paint film products, printing ink, scotch tape and so on. This product should not be used for applications other than the chewing gum base agent and the covering agent for fruit or vegetable skin. It is colorless to pale yellow lumpy or glassy lump. It does not dissolve in water and fat but dissolves in alcohols and esters such as ethanol and ethyl acetate. It is odorless, tough and plastic, so it is colored with sunlight or heat, but there is no aging. It is thought that there is almost no toxicity like a sword. The vinyl acetate resin serves to make the output output from the filament of the 3D printer add elasticity to prevent further breakage. Further, the coloring property of the natural coloring matter may be further added.

According to another embodiment of the present invention, the filament for a 3D printer may further comprise at least one of stearic acid, carnauba wax, calcium hydroxide for food, and aroma oil.

Filaments for 3D printers may contain stearic acid, carnauba wax, calcium hydroxide for food or 0.5 to 5 wt% aroma oil based on the total amount of filaments for 3D printers.

Stearic acid is a saturated fatty acid with a carbon number of 18. It is an ester with glycerol. It is widely distributed in plant and animal species or in phospholipids. It is the most abundant fatty acid in nature. Formula is C ₁₈ H ₃₆ O _2, and in the white leaf-shaped crystals at room temperature, the molecular weight 284.48g / mol, melting point 71 ~ 71.5 ℃, 69.4 ℃ freezing point, boiling point 383 ℃, density 0.94g / cm ^3.

Stearic acid plays a similar role to natural beeswax, but it can be made more rigidly than natural beeswax.

Carnauba Wax (Carnauba Wax) is a wax obtained from palm and Brazil wax palm leaves and shoots. Carnauba wax is a pale yellow to pale brown powder, flake or natural wax in a hard, crumbly mass. Partially soluble in boiling alcohol, soluble in chloroform and ether but not soluble in water. The specific gravity should be about 0.997 and the melting point should be 80 ~ 86 ℃. The allowable daily intake (ADI) is 0.0 to 7.0 mg / kg, and it is used as a confectionery of candy.

Carnauba wax is used to make the article hard.

Calcium hydroxide is a colorless crystal, Ca (OH) ₂ , which is difficult to dissolve in water. The aqueous solution is called limestone and the suspension is called limy limestone. In addition, the aqueous solution absorbs carbon dioxide in the air to cause clouding of calcium carbonate. Calcium oxide (calcium oxide CaO) is produced by the action of water and generates heat violently. Calcium hydroxide is used as a neutralizing agent for inexpensive industrial bases, caustic and acidic soil, but it means industrial calcium hydroxide. In the present invention, calcium hydroxide for food used as a food additive is used.

Calcium hydroxide makes the color of the natural pigment more clear, improves the texture of the product, and facilitates the coloring.

Aroma oil (essential oil) is a volatile or flammable substance extracted from herbs, spices and plant flowers, stems, fruit, roots, leaves, bark, resin, etc., which have active ingredients. And it can play a role in bringing about psychological stability. In the present invention, the flavor-imparting oil may be any food additives.

The filament for a 3D printer according to the present invention can be used as a 3D printer material when manufacturing a crayon with a 3D printer. This is only an embodiment, and the 3D printer material according to the present invention is used in 3D printing, and its use is not limited.

FIG. 1 is a flowchart illustrating a process of manufacturing a filament for a 3D printer according to an embodiment of the present invention. Referring to FIG.

Referring to FIG. 1, step 110 is a first stirring step in which natural beeswax, cacao butter, starch, soybean oil, natural pigment and vinyl acetate resin are dissolved by heating. In another embodiment, at least one of stearic acid, carnauba wax, calcium hydroxide for food, and aroma oil may be further contained and heated to dissolve.

At this time, the filament for the 3D printer in which the first stirring process is performed is composed of 20 to 30 wt% of natural beeswax, 2 to 10 wt% of cacao butter, 2 to 10 wt% of starch, 2 to 10 wt% of soybean oil % Of a natural coloring matter, 2 to 10% by weight of a natural coloring matter, 30 to 70% by weight of a vinyl acetate resin, and 0.5 to 5% by weight of stearic acid, carnauba wax, calcium hydroxide for food or aroma oil.

Step 120 is a dispersion process in which the melt, which is the result of the first stirring process, is cooled and solidified and dispersed. The melt of the first stirring process is cooled through cooling water, and then the melt is pulverized or dispersed by being fed into a 3-roll mill.

A triple mill is a device applied to the homogenization of a sample by passing the sample through a fine gap between horizontally laid rollers. As the three adjacent rollers rotate, pressure and shearing force are applied to the sample to obtain the effect of mixing, grinding and dispersing.

The particles of the powder raw materials are uniformly dispersed through the pulverization or dispersion process, so that they are more easily dissolved. In the case of the natural coloring matter, the size of the particles is unbalanced so that coloring and coloring are facilitated through fine pulverization.

Step 130 is a second stirring step, and the resultant is subjected to the pulverizing process of step 120 to dissolve again.

Step 140 is an extrusion process, in which a 3D printer material that has undergone a second agitation process is extruded in a filament form through an extruder to be used in a 3D printer.

The present invention has been described with reference to the preferred embodiments. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. Therefore, the disclosed embodiments should be considered in an illustrative rather than a restrictive sense. The scope of the present invention is defined by the appended claims rather than by the foregoing description, and all differences within the scope of equivalents thereof should be construed as being included in the present invention.

110 - first stirring process, 120 - dispersion process
130 - second stirring process, 140 - extrusion process

Claims (6)

Natural beeswax, cacao butter, starch, soybean oil, natural pigment, and vinyl acetate resin. The method according to claim 1,
The 3D printer filament may contain 20 to 30 wt% of natural beeswax, 2 to 10 wt% of cocoa butter, 2 to 10 wt% of starch, 2 to 10 wt% of soybean oil, 2 to 10 wt% of natural pigment, And 30 to 70% by weight of a vinyl acetate resin. 3. The method of claim 2,
Wherein the filament for the 3D printer further comprises at least one of stearic acid, carnauba wax, calcium hydroxide for food, and aroma oil. The method of claim 3,
Wherein the 3D printer filament comprises 0.5 to 5% by weight of stearic acid, 0.5 to 5% by weight of carnauba wax, 0.5 to 5% by weight of calcium hydroxide for food or 0.5 to 5% by weight of aroma oil based on the total amount of filaments for 3D printer Wherein the filament is formed of a thermoplastic resin. The method according to claim 1,
Wherein the filament for a 3D printer is a 3D printer and is used as a material for manufacturing a crayon. Heating and dissolving natural beeswax, cacao butter, starch, soybean oil, natural pigment and vinyl acetate resin;
Cooling and solidifying and dispersing the melt;
Reheating and re-dissolving the dispersion; And
And extruding the redissolved material in the form of a filament.

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