TWI744170B - Manufacturing method of bamboo straw and finished product structure - Google Patents

Abstract

A method for manufacturing bamboo straw. Put bamboo slices into a container and boil the bamboo slices in alkaline water to soften them. After cooling, add acid to make the water pH neutral; after drying, apply a layer on one surface of the bamboo slices edible protective glue, apply a sticky glue on any long side of the side coated with protective glue, use the side with protective glue as the inner surface to roll the bamboo sheet on the outer circumference of a round rod, and draw out the round rod after the glue is dried Form a straw. Then soak the straw in pure water for about 1~3 min. After the straw is taken out and dried, cut out an oblique opening at one end of the straw and an upper port at the other end of the straw. Complete a straw made of bamboo.

Description

Manufacturing method of bamboo straw and its finished product structure

The present invention relates to a straw, in particular to a straw that is made of 99% natural bamboo, has considerable toughness, can be washed and reused, and can be decomposed by soil microorganisms without causing environmental problems.

Generally, the plastic straws on the market, because the material is light and easy to drift with the wind, in the end a large number of them will flow into the sewer and then be discharged into the sea. In addition, because the material is light and cannot be recycled, it has to be discarded once it is used. Manufacturers must produce in large quantities to keep up with the convenience that humans need.

Especially in the modern society where hand-crank beverages and aluminum foil-packed beverages are very popular, disposable plastic straws are used in large quantities, and they become garbage after use. They cannot be recycled and reused because plastic straws cannot be decomposed by natural microorganisms. The used plastic straws will cause serious environmental pollution problems.

If the plastic straw is discharged into the sea along the sewer, it has great lethality to marine life. There are endless news about marine life being injured or even killed by accidentally eating plastic waste or being entangled by plastic waste. Although there are some plastic wastes It can be recycled and reused, but most of the plastic waste is disposed of in landfill or incineration. Not only does it occupy a large amount of land, but the occupied land cannot be restored for a long time, which will affect the usability of the land and increase the waste of land resources. If the plastic waste is burned, a large amount of toxic substances will be released. So even if the straw It will take 500 years to decompose naturally without flowing into the ocean and being buried smoothly. No matter how you deal with it, there is no good way to get rid of it. The Environmental Protection Agency of our country has also stipulated that the four major establishments such as chain fast-food restaurants and department stores shall not provide disposable plastic straws when providing in-house catering for the environmental protection movement that should limit plastics.

In order to solve the problem of serious environmental pollution by conventional plastic straw waste, the market has developed a plant fiber single-layer paper straw structure such as my country's No. M597608, which mainly contains a single-layer paper straw that is wound into a tube with a rectangular paper substrate. The rectangular paper sheet is food paper. The inner and outer surfaces are coated with a bamboo fiber outer surface layer and a bamboo fiber inner surface layer, and the bamboo fiber outer surface layer and the bamboo fiber inner surface layer are made of bamboo fiber The two sides of the single-layer paper straw are divided into a top side nozzle and a bottom side nozzle, and the bottom side nozzle is provided with a piercing tip.

However, in actual use, the top side nozzle of the aforementioned single-layer paper straw is the part that is sucked in the mouth by the user. It not only needs to have a good touch, but also cannot be deformed, softened or broken by the melting of saliva and beverages. The piercing tip on the bottom side of the nozzle must have sufficient hardness to quickly and smoothly pierce the film and cover of the beverage cup. In the conventional plant fiber single-layer paper straw structure, the rectangular paper substrate and its inner and outer surface layers are composed of a mixture of bamboo fiber powder and tapioca powder. Once the user holds it in the mouth for too long, it will be softened by saliva and beverages. , And its bottom side nozzle is immersed in liquid beverages, it will become soft and deformed for too long, and the conventional plant fiber single-layer paper straw structure cannot be cleaned and reused, which is the main shortcoming.

Therefore, the main purpose of the present invention is to provide a bamboo straw that is made of bamboo flakes that can be decomposed by natural microorganisms and can be absorbed by the soil without causing garbage and causing environmental problems.

Another object of the present invention is to provide a suction formed by winding bamboo sheets. The tube has sufficient hardness and toughness, can be inserted into the beverage cup easily and quickly, and will not be soft and deformed by saliva and beverage when it is contained in the mouth of the user. Even if it is immersed in a beverage for a long time, it will not Soften deformation.

Another object of the present invention is to provide a straw made of bamboo, which can be cleaned, and can be used repeatedly for many times without deformation or softening, which can reduce the generation of garbage, and has great industrial applicability and market development. value.

In order to achieve the above objective, the present invention discloses the first method of manufacturing a bamboo straw, which includes the following steps:

Material preparation and smoothing: Use bamboo to cut at least one rectangular piece of bamboo, and smooth the front and back sides of the bamboo piece to make it smooth;

Boiling to soften: Put the bamboo slices into a container, and add an appropriate amount of alkali powder to the container, boil in water for at least 1 hour to soften the bamboo slices;

Cooling: Let stand to cool, add acid to make the pH value of the water in the container reach neutral;

Drying: Take up the bamboo slices and spread them flat for drying;

Gluing: Coating a layer of protective glue on one surface of the bamboo sheet;

Forming: After the protective glue is dried, take a round rod, take the side with the protective glue as the inner surface, wind the bamboo sheet around the outer circumference of the round rod, and pull out the round rod to form a straw;

Soaking: soak the straw in pure water for 1 to 3 minutes;

Shaping: Take out the straw and let it dry naturally to form a straw product.

Among them, in the preparation and grinding steps, the length of the bamboo slice is set based on the depth of the beverage cup/aluminum foil package, the width of the bamboo slice is between 4 cm and 10 cm, and the thickness of the bamboo slice is between 0.03 and 0.03 cm. Between 0.06 cm.

Wherein, in the boiling and softening step, the ratio of the water and the alkali powder is 100:1.

Wherein, in the boiling and softening step, the bamboo slices are boiled in water at 100°C to 120°C for at least 1 hour.

Wherein, in the step of standing and cooling, the acid added into the container is citric acid.

Wherein, in the drying step, the bamboo flakes are dried in the sun.

Wherein, in the drying step, the bamboo pieces are dried by natural drying.

Wherein, in the gluing step, the protective glue is an edible glue, and the edible glue is a mixed glue of seaweed glue mixed with resin.

Wherein, in the forming step, a glue is applied to any long side of the side of the bamboo sheet coated with the protective glue, and then the side with the protective glue is used as the inner surface by the round rod to make the bamboo sheet follow the The shape of the round rod is wound around the outer circumference of the round rod in an oblique spiral manner to form the straw, and the glue is adhered to the outer surface of the bamboo sheet.

Wherein, in the forming step, a glue is applied to any long side of the side of the bamboo sheet coated with protective glue, and then the side with the protective glue is used as the inner surface by the round rod, and the bamboo sheet does not have One long side of the glue is attached to the surface of the round rod, and the straw is rolled into the straw according to the shape of the round rod, and the glue is adhered to the outer surface of the bamboo sheet.

Wherein, after the shaping step, an oblique opening is cut out at one end of the straw, and the oblique opening has a pointed part.

Wherein, after the shaping step, a flat upper port is cut out at the other end of the straw.

Among them, in the preparation and grinding steps, two rectangular pieces of bamboo are cut by bamboo, and in the forming step, one of the pieces is used to coat the left and right sides of the side that does not have the protective glue. Apply adhesive, and use the round rod to stick the side with the protective glue on the surface of the round rod, and then take the other of the two bamboo pieces and stick it on the round rod so that the two bamboo pieces face each other. The left and right sides of the bamboo sheet are superimposed and bonded, and after drying, the round rod is drawn out to form the straw.

A straw structure made by using the aforementioned bamboo straw manufacturing method, comprising: at least a straw rolled from a bamboo sheet and a protective glue pre-coated on the inner surface of the bamboo sheet and rolled with the bamboo sheet It is formed around the inner wall of the straw. One end of the straw has an oblique opening, the oblique opening has a pointed part, and the other end of the straw has a flat upper port.

A straw structure made by using the above-mentioned bamboo straw manufacturing method, which comprises: two bamboo sheets are wound to form a straw, and the protective glue is pre-coated on the inner surface of the two bamboo sheets and accompanies the bamboo sheet Wrapped and formed on the inner wall of the straw, the left and right sides of the two bamboo pieces are mutually bonded together, and the inner surface of the straw is provided with a layer of protective glue.

Therefore, the present invention has at least the following advantages: 1. The main raw material of the straw structure of the present invention is taken from bamboo chips, which is convenient and cheap to obtain the raw materials, easy to promote, and has industrial applicability. 2. As bamboo chips can be decomposed by natural microorganisms and can be absorbed by the soil, it will not cause garbage and cause environmental problems. 3. The surface of the bamboo slice made of the present invention is smoothed in advance, has a good touch and can emit the aroma of natural bamboo slices, which is beneficial to the health of the human body. 4. The straw formed by winding the bamboo sheet of the present invention has sufficient rigidity and can be easily and quickly inserted into the beverage cup. 5. The straw made of bamboo slices of the present invention has sufficient hardness and can be cleaned after use without softening and destroying its shape. Therefore, it can be used repeatedly for many times, greatly reducing the generation of garbage and avoiding environmental protection problems.

100: round rod

1: straw

1a: oblique mouth

1b: Tip

1c: Upper port

10, 10a, 10b: bamboo chips

20: Protective glue

30: viscose

Fig. 1 is a flowchart of the first embodiment of the present invention.

Fig. 2 is a schematic diagram of the bamboo sheet coated with protective glue and glue in the first embodiment of the present invention.

FIG. 3 is a schematic diagram of the first embodiment of the bamboo sheet rolled on a round rod of the present invention.

4 is a second schematic diagram of the bamboo sheet being rolled on a round rod according to the first embodiment of the present invention.

Fig. 5A is a first perspective view of a straw made of the first embodiment of the present invention.

Fig. 5B is a cross-sectional view of Fig. 5A.

Fig. 6A is a second perspective view of a straw made in the first embodiment of the present invention.

Fig. 6B is a cross-sectional view of Fig. 6A.

Fig. 7 is a flowchart of the second embodiment of the present invention.

FIG. 8 is a schematic diagram of the second embodiment of the second embodiment of the present invention, the bamboo sheet and the round rod.

Fig. 9A is a perspective view of a straw made in the second embodiment of the present invention.

Fig. 9B is a cross-sectional view of Fig. 9A.

The detailed content and technical description of the present invention will now be further described with examples, but it should be understood that these examples are for illustrative purposes only and should not be construed as limitations to the implementation of the present invention.

Please refer to Figure 1, Figure 2, Figure 3 and Figure 4, which are the first embodiment of the bamboo straw manufacturing method of the present invention, which includes the following steps:

S11: Preparing and smoothing. Bamboo is used as the material. The bamboo is obliquely cut into a bamboo slice 10. The length of the bamboo slice 10 matches the depth of the beverage cup or the aluminum foil package as a set value. The width of the bamboo slice 10 depends on the volume. The diameter of the pipe-shaped straw is a set value. In this embodiment, the length of the bamboo sheet 10 is about 12 cm to 25 cm, and the width of the bamboo sheet 10 is about 4 cm to 10 cm. In between, the thickness of the bamboo sheet 10 is about 0.03 to 0.06 cm. The front and back sides of the bamboo sheet 10 are smoothed to make the front and back surfaces of the bamboo sheet 10 smooth.

S12: Boil to soften, put the bamboo chip 10 into a container, the container is filled with clean water, and add the alkali powder to the water at a ratio of 100:1 between the water and the alkali powder, and then heat the aforementioned content at 100℃~120℃ The bamboo slice 10 is boiled in water of alkali powder for about 1 hour to soften the bamboo slice 10.

S13: Cooling. After step S12 is completed and standing for cooling, add acid, such as citric acid for neutralization, so that the pH of the water reaches neutral.

S14: Drying, pick up the bamboo slice 10 from the water and spread it flat on a surface for drying. The bamboo slice 10 can be dried in the sun or dried by natural drying.

S15: Gluing, coating a layer of protective glue 20 on a surface of the bamboo sheet 10, and the protective glue 20 is an edible glue, such as a mixed glue of seaweed glue mixed with resin.

S16: After forming, after the protective glue 20 is dried, apply a certain width of glue 30 on any long side of the bamboo sheet 10 with the protective glue 20, and use the side with the protective glue 20 as the inner surface, The bamboo sheet 10 is wound around a round rod 100, and the glue 30 will stick to the outside of the bamboo sheet 10. After the glue 30 is dried, the round rod 100 is drawn out to form a straw. The bamboo sheet 10 can be spirally wound obliquely around the outer circumference of the rod 100 to form a straw 1, as shown in FIG. 3, FIG. 5A, and FIG. 5B. The bamboo sheet 10 may also have a long side without glue It is attached to the surface of the round rod 100, and then rolled into a straw 1 according to the shape of the round rod 100, as shown in Figs. 4, 6A, and 6B.

S17: Soak, soak the straw 1 in pure water for about 1 to 3 minutes.

S18: Finalize the shape, take out the straw 1 and place it outdoors. After it is naturally dried by sunlight, a finished straw 1 is formed, and then an oblique opening 1a is cut out at one end of the finished straw 1 and the oblique opening 1a has a pointed portion 1b . If the bamboo sheet 10 is spirally wound around the outer circumference of the round rod 100 in an oblique direction, the The other end of the finished straw 1 is cut out a flat upper port 1c.

The straw structure made by the above steps, the straw structure comprises: a straw 1 rolled from a bamboo sheet 10 and a protective glue 20 pre-coated on the inner surface of the bamboo sheet 10 and wound with the bamboo sheet 10 Formed on the inner wall of the straw 1, one end of the straw 1 has an oblique opening 1a, the oblique opening 1a has a pointed portion 1b, and the other end of the straw 1 has a flat upper port 1c.

Please refer to Figure 7, Figure 8, Figure 9A and Figure 9B, which are the second embodiment of the bamboo straw manufacturing method of the present invention, which includes the following steps:

S21: Preparing and smoothing. Bamboo is used as the material. The bamboo is cut into two pieces of bamboo 10a, 10b. The length of the two pieces of bamboo 10a, 10b is matched with the depth of the beverage cup or aluminum foil bag as the set value. The width of 10a, 10b is a set value depending on the diameter of the straw 1 rolled into a tube. In this embodiment, the length of the two bamboo pieces 10a, 10b is approximately between 12 cm and 25 cm, and the two bamboo pieces 10a , The width of 10b is about 4 cm to 10 cm, the thickness of the two bamboo pieces 10a, 10b is about 0.03 to 0.06 cm, and the front and back sides of the two bamboo pieces 10a, 10b are smoothed. The front and back surfaces of the two bamboo pieces 10a and 10b are made smooth.

S22: Boil to soften, put the two bamboo slices 10a, 10b into a container, the container is filled with clean water, and the alkali powder is added at a ratio of 100:1 between water and alkali powder, and then heated at 100℃~120℃ The above-mentioned salty powder-containing water is boiled for about 1 hour to soften the two bamboo pieces 10a and 10b.

S23: Cooling. After step S22 is completed and left to stand for cooling, add acid, such as citric acid, for neutralization, so that the pH of the water reaches neutral.

S24: Drying, pick up the two bamboo pieces 10a, 10b from the water, and spread them on a surface for drying; the two bamboo pieces 10a, 10b can be dried in the sun or dried by natural drying change.

S25: Gluing, coating a layer of protective glue 20 on one surface of the two bamboo sheets 10a, 10b. The protective glue 20 is an edible glue, such as a mixed glue of seaweed glue mixed with resin.

S26: After the protective glue 20 is dried, take one of the bamboo pieces 10a and apply a certain width of glue 30 on the left and right sides of the side that does not have the protective glue 20. The glue 30 can be edible glue. A round rod 100 is used to cover the surface of the round rod 100 with a protective glue 20 to form a semicircle; 10b face each other, and the left and right sides of the two bamboo pieces 10a, 10b are superimposed and bonded. After the glue 30 is dried, the round rod 100 is drawn out to form a straw 1.

S27: Soak, soak the straw 1 in pure water for about 1 to 3 minutes.

S28: After shaping, take out the straw 1 and place it outdoors. After it is naturally dried and shaped by sunlight, a finished straw 1 is formed, and then an oblique opening 1a is cut out at one end of the finished straw 1 and the oblique opening 1a has a pointed part 1b.

The straw structure made by the above steps, the straw structure includes: two bamboo pieces 10a, 10b are relatively attached to the round rod 100 by a round rod 100, and the two bamboo pieces 10a, 10b are joined together at the left and right sides. It is coated with glue 30. After the glue 30 is dried, the rod 100 is drawn out to form a straw 1 and a protective glue 20 is coated on the inner surface of the straw 1. One end of the straw 1 has an oblique opening 1a , The oblique opening 1a has a pointed portion 1b.

The present invention has at least the following advantages: 1. The main raw material of the straw structure of the present invention is taken from bamboo chips, which is convenient to obtain the raw materials and is cheap, easy to promote, and has industrial applicability. 2. As bamboo chips can be decomposed by natural microorganisms and can be absorbed by the soil, it will not cause garbage and cause environmental problems. 3. The surface of the bamboo slice made of the present invention is smoothed in advance, has a good touch and can emit the aroma of natural bamboo slices, which is beneficial to the health of the human body. 4. The present invention is wound by bamboo The formed straw has sufficient rigidity and can be easily and quickly inserted into the beverage cup. 5. The straw made of bamboo slices of the present invention has sufficient hardness and can be cleaned after use without softening and destroying its shape. Therefore, it can be used repeatedly for many times, greatly reducing the generation of garbage and avoiding environmental protection problems.

However, the above are only preferred embodiments of the present invention, and should not be used to limit the scope of implementation of the present invention, that is, all simple equivalent changes and modifications made in accordance with the scope of the patent application of the present invention and the content of the description of the invention are all It still falls within the scope of the patent for this invention.

S11~S18: steps

Claims (15)

A method for manufacturing bamboo straws, which includes the steps of preparing materials and smoothing: using bamboo to cut at least one rectangular piece of bamboo, and smoothing the front and back sides of the bamboo piece to make it smooth; boiled to soften: Put the bamboo slices into a container, and add appropriate amount of alkali powder in the container, boil it in water for at least 1 hour to soften the bamboo slices; cooling: let stand to cool, add acid to make the pH of the water in the container reach neutral; dry : Take up the bamboo slice and lay it flat for drying; Gluing: Coat a layer of protective glue on one surface of the bamboo slice; Forming: After the protective glue is dried, borrow a round rod and take the side with the protective glue as On the inside, wrap the bamboo sheet around the outer circumference of the round rod, and pull out the round rod to form a straw; soak: soak the straw in pure water for 1 to 3 minutes; shape: take out the straw and let it dry naturally Form a straw product. The method for manufacturing bamboo straws as described in item 1 of the scope of patent application, wherein, in the steps of material preparation and grinding, the length of the bamboo piece is set by the depth of the beverage cup/aluminum foil package, and the width of the bamboo piece Between 4 cm and 10 cm, the thickness of the bamboo sheet is between 0.03 and 0.06 cm. According to the method for manufacturing bamboo straws described in item 1 of the scope of patent application, in the boiling and softening step, the ratio of the water and the alkali powder is 100:1. According to the method for manufacturing bamboo straws as described in item 1 of the scope of patent application, in the boiling and softening step, the bamboo slices are boiled in water at 100°C to 120°C for at least 1 hour. According to the method for manufacturing bamboo straws described in item 1 of the scope of patent application, the acid added to the container is citric acid in the step of standing and cooling. According to the method for manufacturing bamboo straws as described in item 1 of the scope of patent application, in the drying step, the bamboo slices are dried in the sun. According to the method for manufacturing bamboo straws described in item 1 of the scope of patent application, in the drying step, the bamboo slices are dried by natural drying. According to the method for manufacturing bamboo straws described in item 1 of the scope of patent application, in the gluing step, the protective glue is an edible glue, and the edible glue is a mixed glue of seaweed glue mixed with resin. The method for manufacturing bamboo straws as described in item 1 of the scope of patent application, wherein, in the forming step, a sticky glue is applied to any long side of the protective glue-coated side of the bamboo sheet, and then the round rod is used to Taking the side with the protective glue as the inner surface, the bamboo piece is wound around the outer circumference of the round rod in an oblique spiral according to the shape of the round rod to form the straw, and the glue is glued to the outside of the bamboo piece surface. The method for manufacturing bamboo straws as described in item 1 of the scope of patent application, wherein, in the forming step, a sticky glue is applied to any long side of the protective glue-coated side of the bamboo sheet, and then the round rod is used to The side with the protective glue is used as the inner surface, and the long side of the bamboo sheet without glue is attached to the surface of the round rod, and then the straw is rolled into the straw according to the shape of the round rod, and the glue is glued to the bamboo The outer surface of the piece. According to the method for manufacturing bamboo straws as described in item 1 of the scope of patent application, after the shaping step, an oblique opening is cut out at one end of the straw, and the oblique opening has a pointed part. The method for manufacturing a bamboo straw as described in the first item of the scope of patent application, wherein after the shaping step, a flat upper port is cut out at the other end of the straw. The method for manufacturing bamboo straws as described in item 1 of the scope of patent application, wherein in the steps of preparing and grinding, two rectangular pieces of bamboo are cut by bamboo, and one of the pieces is used in the forming step. Apply adhesive on the left and right sides of the side without the protective glue, and use the round rod to stick the side with the protective glue on the surface of the round rod, and then take the other of the two bamboo pieces and stick it on the round rod. The rod makes the two bamboo pieces face each other, and the left and right sides of the two bamboo pieces are superimposed and bonded. After drying, the round rod is drawn out to form the straw. A straw structure made by using the bamboo straw manufacturing method described in item 1 of the scope of patent application, which comprises: at least a straw rolled from a bamboo sheet and a protective glue coated in the bamboo sheet in advance The surface is formed on the inner wall of the straw along with the bamboo sheet. One end of the straw has an oblique opening, the oblique opening has a pointed part, and the other end of the straw has a flat upper port. A straw structure made by using the bamboo straw manufacturing method described in item 1 of the scope of patent application, which comprises: two bamboo sheets are wound to form a straw, and the protective glue is pre-coated on the two bamboo sheets. The inner surface is formed on the inner wall of the straw along with the bamboo sheet. The left and right joints of the two bamboo sheets are interlocked and coated with glue. The inner surface of the straw is provided with a layer of protective glue.

Images