JP6931468B2 - How to make wooden straws for beverages - Google Patents

Description

The present invention relates to a method for producing a wooden straw for beverages, which is a hollow wooden pipe in which a sliced single thin plate is wound at a specific angle with respect to the grain direction.

For drinking straws used for beverages, the plastic tube used as the raw material for the straw is cut slightly longer than the depth of the sealed container, and one end of the tube is cut diagonally to form a straw in the sealed part of the sealed container. -The tip is easy to pierce, and the other end is simply sliced into round slices. In addition, beverages in sealed containers in which a straw is integrally adhered to the side surface of the sealed container are sold for vending machines. If the straw used for this is longer than the sealed container, the protruding part will be an obstacle and it will be difficult for the straw to flow smoothly into the vending machine, so the length should be less than the length of the side surface of the sealed container. A double-tube type that can be reduced to a large size is also widespread.

Conventionally, liquid or fluid beverages such as milk and soft drinks are stored and sold in a packaging container made of a packaging material whose inner surface is coated with polyethylene. The beverages contained in the packaging container having the above constitution include fruit juice flavored beverages containing no fruit juice or a small amount of natural fruit juice, soft beverages containing fruit juice containing 10% or more of natural fruit juice, and fruit juice containing 50% or more of natural fruit juice. There are various beverages such as beverages and natural fruit juice beverages. These come with plastic straws, which poses an environmental problem.

Generally, the straw is made of resin, and the straw that sucks up the beverage from the container and absorbs the liquid and the straw that extends from the slanted opening at the tip to the drinking port at the rear end are generally formed in a perfect circular cross section. It is used when the sealing film forming the inner surface of the suction port of the pack is pierced from the opening of the tip and the opening is opened to suck and drink the beverage. Most of them are made of plastic in terms of processing and price to enable expansion and contraction or bending.

Recent environmental issues have made the use of this plastic straw difficult from an environmental point of view. Materials other than plastic are being considered in terms of processing and price, but it is becoming difficult from both sides. A straw having a large number of circumferential grooves in the middle of the straw in the longitudinal direction is described in order to allow expansion and contraction or bending (see Patent Document 1).

In a beverage wrapping paper pack having a straw hole protected by a thin film, the straw integrally attached to the paper pack and the straw are projected from a predetermined position, and the thin film is inserted when the straw is inserted into the straw hole. Paper containing at least one protrusion of a chevron cross section that forms an air flow gap between the straw hole and the straw to communicate the inside and outside of the paper pack by breaking larger than the outer diameter of the straw. Straws for packs have been proposed (see Patent Document 2).

A beverage straw composed of a plurality of straw tubes used for a liquid food paper container, wherein the liquid food paper container has a thin-walled portion on the vessel wall for inserting the beverage straw, and the straw has the thin-walled portion. It has a sharp tip spear and a tip base formed by cutting diagonally at the tip of the straw tube on the side to be inserted into the portion, and the outer corner of the tip base is rounded and / or chamfered. Beverage straws have been proposed (see Patent Document 3).

It consists of an inner straw and an outer straw, and the inner straw is housed inside the outer straw. This is a drinking straw that extends by pulling out the inner straw from the outer straw, and the length of the outer straw is the length of the inner straw. A double straw for beverages has been proposed, which is approximately doubled, has a bellows portion at the middle position of the outer straw, and also has a bellows portion at a position near the drinking spout of the outer straw (see Patent Document 4). ..

In providing a cylindrical container that is easy to process and can bring out a three-dimensional design change of natural materials on the outer peripheral surface, a bottomed cylindrical main cylinder and a lid cylinder that opens and closes the opening of the main cylinder. The main cylinder and the lid cylinder are formed by winding a thin wooden plate so as to be inclined with respect to the axis, and the edge of the thin plate causes a stepped shape on the outer peripheral surface of the main cylinder and the lid cylinder. Form the decorative part of. In this decorative portion, a cylindrical container formed so as to extend in a direction inclined with respect to the axis has been proposed (see Patent Document 5).

In providing paper straws that can replace plastic straws and have the advantages of environmental protection, degradability, convenience of use and high quality, a substrate consisting of strips of paper containing a calcium carbonate component is used. A straw made of beverage paper has been proposed in which the side edges are overlapped and wound diagonally to form a spiral tube in which both ends are communicated with each other, and the adjacent and overlapping portions of the base materials are in close contact with each other. See Patent Document 6).

As described above, beverage straws are usually made of plastic, which is an improvement in convenience and a device in terms of use. On the other hand, from the environmental point of view, paper straws other than plastic straws exist, but they are wound with resin and minerals instead of just paper, and the operation is complicated in terms of production. In particular, plastic straws tend to be banned worldwide, which makes it difficult to use plastic straws. Naturally friendly wood and paper products are expected as alternatives to plastic, but there are many problems in terms of production, technology, price, and design.

Special Publication No. 51-33477 Utility Model Registration No. 30070876 Japanese Unexamined Patent Publication No. 2006-141575 JP-A-2009-160251 JP-A-2010-5962 Utility Model Registration No. 32166663

The present invention has been made in view of such circumstances, and an attempt is made to use a pipe made of wood or paper, which is an environmentally friendly material, in place of a plastic pipe pipe made of a straw raw material. In doing so, we are trying the possibility of a straw made of a material other than plastic that can be easily and quietly and safely inhaled by preventing the unexpected release of beverages as a straw.

All straws for paper cartons currently in use are made of plastic. This plastic straw has an adverse effect on other organisms and is banned from the environmental point of view. Until now, straws have not been studied from other materials because they are made of plastic and various shapes can be manufactured at low cost. Especially in Europe, plastic straws are banned, making it difficult to use. Naturally friendly wood and paper products are expected to replace straws with plastic, but there are many problems in terms of production and price. The purpose is to make effective straws using nature-friendly wood to make wooden straws as well as the appearance of practic products.

The invention according to claim 1 is a rectangular wood slice single thin plate having a wood grain pattern extending in the length direction and having a wood grain width in the range of 0.5 to 30 mm and a thickness of 0.1 to 0.3 mm. Wrap it 3 to 6 times diagonally around the outer surface of the round bar so that the grain direction is 10 ° to 30 ° with respect to the axis of the round bar, and glue it to the end of this wood slice single thin plate. This is a method for producing a wooden straw for beverages, in which a wooden hollow pipe is obtained by applying the above, and the inner and outer surfaces of the wooden hollow pipe are coated with a paint.
According to the second aspect of the present invention, when the wood slice single thin plate is wound around a round bar, an adhesive is applied to the joint surface of one side of the wood slice single thin plate, and the uncoated surface on the back surface is the round bar. By wrapping it around the outer surface of the body, the wooden hollow pipe in which a plurality of layers of wood slice single thin plates are superposed is obtained, and the wooden hollow pipe is heat-treated, further subjected to steam treatment, and then coated with the paint. The method for producing a wooden straw for beverage according to claim 1.
The invention according to claim 3 is the method for producing a wooden straw for beverages according to claim 1 or 2, wherein the paint is a lacquer paint, a urethane paint or a silicon nanosilica silicate paint.

The wood slice single thin plate is a wooden flat plate having a woody characteristic and having a grain width of 0.5 to 30 mm in wood having a specific gravity of 0.4 or more, and has a grain width of 0.5 to 30 mm. A smooth thin wood made of pine wood, fir wood, hinoki wood, and cedar wood that exhibits a clear grain of a flat plate with a surface roughness of ± 0.01 mm or less, and the thickness of the wood is adjusted to 0.1 to 0.3 mm. A thin plate pipe obtained by applying an adhesive to the end of the flat plate at an angle of 10 to 30 ° in the grain direction and winding the flat plate 3 to 6 times along a round bar having an outer pipe diameter of 3 to 10 mm. The round bar body is pulled out from the attached round bar body to obtain a wooden hollow pipe-shaped straw.

A wooden hollow pipe having an inner pipe diameter of 3 to 10 mm is an end portion of a single flat plate having a length of 150 to 300 mm, a width of 50 to 70 mm, and a length of 150 to 300 mm, which is wound in the grain inclination direction. Apply to the end of the joint surface on one side of the flat plate using a food-safe polysaccharide-based or urethane-based emulsion adhesive on the joint surface, and wind the uncoated surface on the back surface around a round bar of 3 to 10 mmφ. The round bar is pulled out from the wound bar obtained by heat-treating the bar to form a wooden pipe having a hollow wood grain inclined side plate surface, and the wooden pipe is used to remove tar and odor. Is steamed.

The wooden pipe can be joined with a deformed pipe, can be adjusted in length and changed in direction, can be inserted into the liquid suction port of the container, and the outer surface of the pipe surface when the beverage is sucked. In order to give moisture resistance and strength to the inner surface, a special paint is applied to the outer surface and the entire inner surface of the hollow pipe to form a coating film having a thickness of 5 to 50 microns on the inner and outer surfaces of the wooden straw. The wooden pipe can be joined into a pipe having an inner diameter of 1 mm to adjust the length and change in direction, and the tip can be cut diagonally and inserted into a paper suction port. Apply a hydrophobic paint to the entire outer and inner surfaces of the pipe so that the beverage does not have hygroscopicity on the outer surface when it absorbs liquid.

The organic or inorganic food-safe film material that coats the inner and outer surfaces of the hollow pipe is selected from lacquer paints, urethane paints, and silicon nanosilica silicate paints. It is a natural resin paint containing ursiol as the main component, which is processed from sap collected from Urushi noki and black tree of the Urushi family. Urethane paint uses a polyol component having multiple hydroxyl groups as the main ingredient and polyisocyanate as the curing agent. It is a combined paint, and the silicon paint is a paint of a vehicle and an inorganic compound having a siloxane bond with nanosilica and silicon as the core, so that the grain of wood stands out on the inner and outer surfaces of the wooden straw and the wooden case. It is a coating film with a thickness of 5 to 50 microns.

Two pieces that can be placed in the center of a hollow wooden pipe with an inner diameter of 3 to 10 mm using a single thin plate of wood slices with a thickness of 0.1 to 0.3 mm. This is a device consisting of a hollow molding part consisting of a round bar shaft for rotation and a round bar shaft for holding down on the upper part. Two of the rod shafts are inserted into the rotating round rod shafts at an appropriate angle with respect to the grain direction, and the adhesive is applied to the ends of the wood slice single thin flat plate and positioned at the center. It is possible to wind it diagonally several times along the round bar of the formwork.
In the above-mentioned device, a motor of a driving body, a two-connected gear shaft body for rotating and adjusting rotation, and two mold frame round bars can be arranged in the center in conjunction with the two-connected gear shaft body on a flat plate plate. The wood slice is a device consisting of a hollow molded portion consisting of a rotating round bar shaft body and a pressing round bar shaft body on the upper part, and a shaft fixing frame body for fixing both ends of the rotating round bar shaft body. A single thin flat plate is sandwiched between two rotating round bar shafts out of three round bar shafts on which a round bar mold is installed at an angle of 10 to 30 ° with respect to the grain direction.

A wooden slice for beverages with a thickness of 0.1 to 0.3 mm is wound 3 to 6 times at an angle of 10 to 30 ° with respect to the grain direction to make a hollow wooden pipe with a pipe diameter of 3 to 10 mm. Straws replace the plastic straws used in terms of design, functionality and environment. In particular, it is widely used as an edible container and is environmentally and naturally superior to plastic straws.

Compared to plastic straws, wooden straws have sufficient strength, are tough with no cracks or scratches, and are durable. In addition, workability is possible depending on the application, and it is hygienic because it has bactericidal and antibacterial properties depending on the coating film with paint. In addition, it is very excellent in terms of the global environment because it changes naturally even if it is discarded.

Perspective view of a wooden straw for beverages. Diagram of the manufacturing process in the production of wooden straws for beverages Enlarged view of the thin plate winding state in the production of wooden straws for beverages. A: Before winding on a round bar B: Winding state C: Winding rod-like body Perspective view showing the usage state of a wooden straw for beverages Diagram showing the outline of a wooden straw making machine for beverages Micrograph of lacquered cross section of wooden straw for beverages 400x photo Micrograph of cross section of urethane coating of wooden straw for beverages 100x photo

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
As an alternative to plastic straws, we will show how to make effective straws using wood that has a natural feeling, aiming at a material of wood that is kind to nature, and considering the production or price.

As shown in FIG. 1, a 0.2 mm thick wood slice single thin plate was wound four times at an angle of 15 ° with respect to the grain direction to form a wooden hollow pipe for beverages having an inner pipe diameter of 5 mm. ..

As shown in FIG. 3, the wood slice single thin plate is a flat plate material decorated with a wooden flat plate having a special scent of wood, which is white to brown in A, and has a grain of cedar wood having a specific gravity of 0.4 or more. A coniferous forest that has a wood grain pattern in the range of 0.5 to 30 mm in width and has a flat plate with a surface roughness of ± 0.1 mm or less in the shape of 50 mm in width and 250 mm in length to exhibit a clear wood grain. A smooth thin flat plate adjusted to a thickness of 0.2 mm is applied to the end of the flat plate at a 15 ° angle in the grain direction at B, and 5 mmφ is applied four times. It was made into a C wound rod shape having a wood grain inclined surface obtained by winding it around a slightly smaller round bar, and formed into a wooden hollow pipe shape.

As shown in FIG. 2, the wooden hollow pipe shape having a pipe diameter of 5 mm has a length of 250 mm, and the flat plate is wound with a slanted grain and uses a food-safe urethane paint-based adhesive on the joint surface of the single flat plate. A joint rod-like body is obtained by applying the coating to one side of the joint surface and winding the non-applied surface around a round bar having a diameter of 5 mm. It was made into a pipe shape with a side plate material surface.
The organic film material that coats the inner and outer surfaces of the wooden straw is lacquer paint, and it becomes a coating film with a thickness of about 10 microns so that the grain of wood is slightly raised on the inner and outer surfaces of the wooden straw. rice field. As shown in the photomicrograph of the cross section in FIG. 6, only the surface was coated with a coating of about 10 microns on average.

As shown in FIG. 4, the wooden straw produced as described above is tougher and more durable than the one made of plastic, with no cracks or scratches. It also has bactericidal and antibacterial properties and is hygienic. In addition, it was a very excellent product in terms of the global environment because it can be replaced naturally even if it is discarded.
The weight of the straw treated with paint was 1.2 g, but when it was immersed in water for 30 minutes, the weight was measured and the weight increased by only about 2%. When a food safety test was conducted on straws, there was no problem with safety.

As shown in FIG. 1, a 0.2 mm thick wood slice single thin plate was wound three times at an angle of 10 ° with respect to the grain direction to form a wooden hollow pipe for beverages having a tube diameter of 4 mm.

As shown in FIG. 3, the wood slice single thin plate is a flat plate material decorated with a wooden flat plate having a white color in A and having a special scent of wood, and has a grain width of 1 to 1 of wood having a specific gravity of about 0.5. A flat plate with a grain pattern in the range of 30 mm and a surface roughness of ± 0.1 mm or less of the single thin plate is made into a shape with a width of 40 mm and a length of 200 mm, and is made of hinoki wood, which is a coniferous forest, to exhibit a clear grain. , A smooth thin flat plate adjusted to a thickness of 0.1 mm of the material, 4 mmφ slightly smaller round bar 3 times while applying adhesive to the end of the flat plate at an angle of 10 ° in the grain direction at B. It was made into a C winding rod shape having a wood grain inclined surface obtained by winding it into a wooden hollow pipe shape.
It is a urethane-based paint that coats the inner and outer surfaces of the wooden straw, and the thickness of the wooden straw so that the grain is slightly raised on the inner and outer surfaces is as thin as about 30 microns as shown in FIG. It became a film. As shown in the photomicrograph of the cross section in FIG. 7, it penetrated into the inside of the conduit and became thin as a whole to 30 microns.

As shown in FIG. 2, a wooden hollow pipe having a pipe diameter of 4 mm has a length of 200 mm, and is wound with a slanted grain. The uncoated surface is wound around a round bar of 4 mmφ to obtain a joined rod-shaped body, and the round bar body is pulled out from the wound rod-shaped body obtained by heat-treating the rod-shaped body to form a hollow wood grain inclined side. It was made into a pipe with a plate surface. As shown in FIG. 4, the wooden straw produced as described above is tougher and more durable than the one made of plastic, with no cracks or scratches. It also has bactericidal and antibacterial properties and is hygienic. In addition, it was a very excellent product in terms of the global environment because it can be replaced naturally even if it is discarded.

Similar to Example 1, a 0.1 mm thick wood slice single thin plate was wound 5 times at an angle of 20 ° with respect to the grain direction to make a wooden hollow pipe for beverages having a pipe diameter of 6 mm.

The wood slice single thin plate is a flat plate material that is white and decorated with a wooden flat plate having a special scent of wood, and has a wood grain pattern in the range of 1 to 20 mm in grain width of wood having a specific gravity of 0.4 or more. A flat plate with a surface roughness of ± 0.1 mm or less is formed into a shape with a width of 50 mm and a length of 300 mm. The adjusted smooth thin flat plate was wound around a 6 mmφ round bar five times at an angle of 20 ° in the wood grain direction while applying an adhesive to form a hollow wooden pipe having a wood grain inclined surface.

As shown in FIGS. It is applied to the joint surface of one side of the flat plate, and the unapplied surface is wound around a round bar having a diameter of 6 mm to obtain a joint rod-like body. It was made into a pipe shape with an inclined side plate material surface. It also has bactericidal and antibacterial properties and is hygienic. In addition, it was a very excellent product in terms of the global environment because it can be replaced naturally even if it is discarded.

It was a wooden straw for beverages in which a 0.15 mm thick wood slice single thin plate was wound four times at an angle of 10 ° with respect to the grain direction to form a wooden hollow pipe having a pipe diameter of 7 mm. The wood slice single thin plate is a flat plate material that has a white to brown color and is decorated with a wooden flat plate having a special scent of wood. A flat plate with a surface roughness of ± 0.01 mm or less is formed into a shape with a width of 50 mm and a length of 250 mm. A smooth thin flat plate adjusted to .15 mm is wound around a 7 mmφ round bar four times at a 10 ° angle in the wood grain direction while applying adhesive to form a wooden hollow pipe with a wood grain inclined surface. became.

The wooden hollow pipe shape with a pipe diameter of 7 mm has a length of 250 mm, is wound with a slanted grain, and is applied to the joint surface of one side of the flat plate using a food-safe polysaccharide-based adhesive on the joint surface of the single flat plate. Then, the uncoated surface is wound around a round bar having a diameter of 7 mm to obtain a joined rod-shaped body, and the round bar is pulled out from the laminated rod-shaped body obtained by heat-treating the rod-shaped body to form a pipe having a hollow wood grain inclined side plate surface. became. As shown in FIG. 4, the wooden straw produced as described above is tougher and more durable than the one made of plastic, with no cracks or scratches. It also had bactericidal and antibacterial properties and was hygienic.

The wood slice single thin plate is a flat plate material that has a white to brown color and is decorated with a wooden flat plate having a special scent of wood. A smooth thin flat plate adjusted to a thickness of 0.15 mm with a fir material to give a clear grain to a shape with a length of 250 mm, while applying an adhesive at an angle of 10 ° in the grain direction 3 It was made into a wooden hollow pipe shape having a wood grain inclined surface obtained by winding it around a round bar body having a diameter of 7 mm over a number of times.

The above-mentioned wooden hollow pipe shape is a motor of a drive body on a flat plate plate as shown in FIG. 5 in the production of a wooden hollow pipe having a pipe diameter of 7 mm by using a wood slice single thin plate having a thickness of 0.3 mm. And the two-connected gear shaft that adjusts the rotation, the two rotating round-bar shafts that can be interlocked with the two-connected gear shaft and the formwork round bar can be placed in the center, and the upper part for holding down. A device consisting of a hollow molded portion composed of a round bar shaft body and a shaft fixing frame body for fixing both ends of the rotating round bar shaft body. Two of the three round bar shafts are sandwiched at an angle of 10 ° with respect to the grain direction, and an adhesive is applied to the end of the wood slice single thin flat plate. , Obtained by diagonally winding three times along a round bar located in the center. A urethane-based paint was applied to this straw.

As shown in FIG. 4, the wooden straw produced as described above is tougher and more durable than the one made of plastic, with no cracks or scratches. It also has bactericidal and antibacterial properties and is hygienic. In addition, a product that is extremely excellent in terms of the global environment has been obtained because it can be naturally replaced even if it is discarded.
The weight of the surface of the straw treated with the paint by this device was 1.3 g, but when it was immersed in water, it was left for 30 minutes, and then the weight was measured. As a result, the weight increased by only about 20%. When a food safety test was conducted on straws, there was no problem with safety.

1 wooden straw,
2 slice single thin plate,
3 Round bar,
4 Winding rod 5 Wood grain,
6 Surface wood grain oblique inclination 7 rolls 8 adhesive,
9 Cup 10 Hollow pipe 11 Hollow pipe molding machine 12 Motor 13 Connecting gear Shaft body 14 Formwork round bar 15 Rotating round bar Shaft body 16 Shaft fixing frame part 17 Coating layer 18 Wood layer

Claims (3)

It has a grain pattern in the range of grain width 0.5~30mm extending lengthwise, wood slice single sheet of rectangular 0.1~0.3mm thickness, its relative to the axis of the round bar A wooden hollow pipe is wound 3 to 6 times diagonally around the outer surface of this round bar so that the grain direction is at an angle of 10 ° to 30 °, and an adhesive is applied to the end of this wood slice single thin plate. A method for manufacturing a wooden straw for beverages, in which the inner and outer surfaces of this wooden hollow pipe are coated with paint. When the wood slice single thin plate is wound around the round bar body, an adhesive is applied to the joint surface of one side of the wood slice single thin plate, and the uncoated surface on the back surface thereof is wound around the outer surface of the round bar body. The wooden for beverage according to claim 1, wherein the wooden hollow pipe on which the layers of the wood slice single thin plate of the above-mentioned wood slices are superposed is obtained, the wooden hollow pipe is heat-treated, and then steam-treated and then coated with the paint. How to make a straw. The method for producing a wooden straw for beverages according to claim 1 or 2, wherein the paint is a lacquer paint, a urethane paint or a silicon nanosilica silicate paint.

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