KR102280619B1 - Manufacturing method for paper straw with corrugate tube - Google Patents

Abstract

The present invention relates to a method for manufacturing a paper straw having a corrugated tube formed therein, and after cutting a base paper to form a straw shape, a corrugated tube is prepared to maintain the shape without disturbing the straw shape because the corrugated tube is generated through heat treatment and compression. will be.
A method for manufacturing a corrugated tube paper straw according to the present invention comprises: a first step of loading a flat base paper bundle; a second step of forming the body part 1 by cutting the base paper bundle to a predetermined length; a third step of supplying the body part (1); A fourth step of coating the body portion 1 by spraying the coating composition, and coating the coating composition after mixing heptane, water, 50w/w% alcohol and 8w/w% alcohol; An adhesive is applied to the junction part 2, which is the end of the coated body part 1, but the adhesive is a polymer mixed with vinyl acetate, butyl acrylate and polyvinyl alcohol. A fifth step of applying water after mixing; a sixth step of molding the body part 1 by connecting the bonding part 2 to which the adhesive is applied; a seventh step of compressing the joint (2) by heat treatment; an eighth step of performing heat treatment to form a corrugated pipe portion 20 in which wrinkles are generated in the body portion 1; and a ninth step of injecting the paper straw generated by the injection part 10 where the lips touch and the moving part 30 where the beverage touches at the upper end of the corrugated pipe part 20 through the formation of the corrugated pipe part 20; using It is characterized in that it is manufactured.

Description

Corrugated tube paper straw manufacturing method {MANUFACTURING METHOD FOR PAPER STRAW WITH CORRUGATE TUBE}

The present invention relates to a method for manufacturing a paper straw having a corrugated tube, and after cutting a base paper to form a straw shape, a corrugated tube is prepared to maintain the shape without disturbing the straw shape because the corrugated tube is generated through heat treatment and compression. will be.

The total amount of plastic produced worldwide is 8.3 billion tons, of which about 6.3 billion tons, or 75%, are discharged as waste. As of 2015, per capita plastic consumption in Korea was 132.7 tons, which is higher than the US (93.8 tons) and Japan (65.8 tons).

In addition, plastic straws, which are consumed at least 2.6 billion a year in Korea alone, flow into the sea and affect sea creatures such as turtles, as well as being transformed into microplastics and appearing on our tables, raising environmental pollution issues.

Plastics do not decompose in nature and remain as microplastics in the micrometer (μm) unit, adversely affecting the marine ecosystem. Microplastics have the property of absorbing harmful substances in the sea, so they are apt to become food for marine organisms. Marine organisms mistake plastic pieces for food and suffer from ingestion or getting caught in parts of their body. In particular, plastic straws are difficult to recycle, so all of them are disposed of only by burning or shredding.

As the environmental pollution problem has emerged, efforts have been made to reduce the use of plastic straws worldwide. The UK has announced a 25-year plan to eradicate plastic waste, and the British royal family has banned single-use plastics. Also, in the case of Korea, in August 2018, the Ministry of Environment banned the use of disposable cups or plastics in coffee shops for the reason of reducing excessive use of disposable products. Depending on the number of violations, fines ranging from KRW 50,000 to a maximum of KRW 2 million were imposed.

In addition, as disposable straws are pointed out as the main culprit of marine litter, there are growing calls around the world to ban the use of disposable straws. Starbucks will phase out single-use straws by 2020, with paper straws being trialled at MGM Resorts, Hyatt hotel chains and McDonald's.

Paper straws are being developed as an alternative to reducing the use of plastic straws, but an excessive amount of adhesive is used to bond the paper used as the main material for paper straws, which has a harmful effect on the human body and is inserted into drinks. A number of problems are occurring, such as the shape of the straw is easily disturbed and the function of the straw is lost. In addition, paper straws are not as durable as plastic straws, making it difficult to wrinkle and maintain their shape.

Korean Patent Publication No. 10-2018-0089880

The present invention has been devised to solve the above problems, and an object of the present invention is to provide a method for producing an eco-friendly, recyclable, eco-friendly paper straw that can be decomposed naturally using paper.

In addition, it is an object of the present invention to provide a method for manufacturing an eco-friendly eco-friendly paper straw by using an adhesive harmless to the human body and capable of natural decomposition.

In addition, an object of the present invention is to provide a method for manufacturing a paper straw that is easily bent provided with a corrugated pipe.

The technical problems to be solved by the invention are not limited to the technical problems mentioned above, and other technical problems not mentioned will be clearly understood by those of ordinary skill in the art to which the present invention belongs from the description below. will be able

A method for manufacturing a corrugated tube paper straw according to the present invention,

A first step of loading a flat sheet bundle;

a second step of forming the body part 1 by cutting the base paper bundle to a predetermined length;

a third step of supplying the body part (1);

A fourth step of coating the body portion 1 by spraying the coating composition, and coating the coating composition after mixing Heptane, water, 50% alcohol and 8% alcohol;

a fifth step of applying an adhesive to the junction part 2, which is the end of the coated body part 1, and applying the adhesive after mixing water with a polymer mixed with vinyl acetate, butyl acrylate and polyvinyl alcohol;

a sixth step of molding the body part 1 by connecting the bonding part 2 to which the adhesive is applied;

a seventh step of compressing the joint (2) by heat treatment;

an eighth step of performing heat treatment to form a corrugated pipe portion 20 in which wrinkles are generated in the body portion 1; and

A ninth step of injecting the generated paper straw into the injection unit 10 where the lips touch and the moving unit 30 where the beverage touches from the upper end of the corrugated tube portion 20 through the formation of the corrugated tube portion 20; using characterized in that it is manufactured.

By means of solving the above problems, the present invention can provide a method for producing an eco-friendly, recyclable, eco-friendly paper straw that can be decomposed naturally using paper.

In addition, the present invention can provide a method for manufacturing an eco-friendly, eco-friendly paper straw by using an adhesive that is harmless to the human body and can be naturally decomposed.

In addition, the present invention provides a method of manufacturing a paper straw that is easy to bend by forming a corrugated pipe part 20 through compression through heat treatment after cutting the base paper and applying an adhesive to first manufacture it in the form of a straw. can

1 is a flowchart showing a method for manufacturing a corrugated tube paper straw of the present invention.
2 is a view showing the shape of the corrugated pipe paper straws manufactured by the corrugated pipe paper straw manufacturing method.
3 is a diagram showing in detail each method of manufacturing a corrugated tube paper straw.

Terms used in this specification will be briefly described, and the present invention will be described in detail.

The terms used in the present invention have been selected as currently widely used general terms as possible while considering the functions in the present invention, but these may vary depending on the intention or precedent of a person skilled in the art, the emergence of new technology, and the like. Therefore, the term used in the present invention should be defined based on the meaning of the term and the overall content of the present invention, rather than the name of a simple term.

In the entire specification, when a part “includes” a certain component, it means that other components may be further included, rather than excluding other components, unless otherwise stated.

Hereinafter, with reference to the accompanying drawings, embodiments of the present invention will be described in detail so that those of ordinary skill in the art can easily carry out the embodiments of the present invention. However, the present invention may be embodied in many different forms and is not limited to the embodiments described herein.

Specific details including the problem to be solved for the present invention, the means for solving the problem, and the effect of the invention are included in the embodiments and drawings to be described below. Advantages and features of the present invention, and a method for achieving them will become apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings.

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

The method for manufacturing a corrugated tube paper straw according to the present invention may be carried out through the first to ninth steps, as shown in FIG. 1 .

First, in the first step (S10), a flat sheet bundle is loaded. As shown in FIG. 3 , the flat base paper bundle is supplied to the paper straw manufacturing apparatus.

Next, in the second step ( S20 ), the body part 1 is formed by cutting the base paper bundle to a predetermined length. More specifically, as shown in FIG. 3 , the body part 1 has a length and width of 4:1 to 4.5:1, and the thickness and width of the body part 1 is 0.1:1. It is preferably formed in a ratio of 0.12:1.

When the ratio of the length to the width is less than 4.0, the diameter of the paper straw manufactured by the present invention increases and may deviate from the standard specifications, and when the ratio of the length to the width exceeds 4.5, the fifth step (S50) below Since the bonding portion 2 to which the adhesive is applied becomes thinner, forming may be difficult when forming the body portion 1 in the sixth step (S60) below, it is preferable to carry out under the above conditions.

In addition, when the ratio of the thickness to the width is less than 0.1, the durability of the paper straws manufactured by the present invention is too low, and after a certain period of time in the beverage, the paper straws may falter or the body part 1 may melt. If there is, and the ratio of the thickness to the width exceeds 0.12, the inner circumferential surface of the paper straw manufactured by the present invention is thickened and there is a problem in that it is difficult to inhale the beverage, so it is preferable to carry out under the above conditions.

Next, in the third step (S30), the body part 1 is supplied, and the basis weight of the body part 1 is 0.3g to 10g. The body portion 1 cut in the second step (S20) is individually provided to the paper straw manufacturing apparatus. When the basis weight of the body portion 1 is less than 0.3 g, the durability of the paper straw is too low, and there is a risk that the paper straw may falter or the body portion 1 may melt after a certain time in the beverage, and the basis weight When it exceeds 10 g, the weight of the manufactured paper straw is too heavy, so when forming the body part 1 in the sixth step (S60) below, it is difficult to form and requires a lot of raw materials, so there is a problem that the unit price increases. Preferably, it is preferable to supply 0.7 g more preferably.

Next, in the fourth step (S40), the body part 1 is coated with a coating composition by spraying, but the coating composition is mixed with heptane, water, 50w/w% alcohol and 8w/w% alcohol. and then coat

More specifically, the coating composition is prepared by mixing 1 part by weight of the water, 1.1 parts by weight of the 50w/w% alcohol, and 2.1 parts by weight of the 8w/w% alcohol based on 1 part by weight of the heptane.

When less than 1 part by weight of the water is mixed with respect to 1 part by weight of the heptane, the concentration of the coating composition may increase, so that it may be difficult to spray the coating composition, and the heptane may be difficult to spray with respect to 1 part by weight of the heptane. When mixing in excess of 1 part by weight of water, the concentration of the coating composition is lowered, so there is a fear that the coating power of the coating composition is lowered.

When less than 1.1 parts by weight of the 50w/w% alcohol is mixed with respect to 1 part by weight of the heptane, there is a problem in that the concentration of the coating composition increases, and the 50w/w% based on 1 part by weight of the heptane When mixing in excess of 1.1 parts by weight of w% alcohol, there is a problem in that the adhesive strength is lowered.

When less than 1.1 parts by weight of the 8w/w% alcohol is mixed with respect to 1 part by weight of the heptane, there is a problem in that the concentration of the coating composition increases, and the 8w/w% alcohol based on 1 part by weight of the heptane When mixing in excess of 1.1 parts by weight of w% alcohol, there is a problem in that the adhesive strength is lowered.

Next, in the fifth step (S50), an adhesive is applied to the junction part 2 which is the end of the coated body part 1, and the adhesive is vinyl acetate, butyl acrylate, and polyvinyl. Water is mixed with a polymer mixed with alcohol (polyvinyl alcohol) and then applied. More specifically, the bonding portion 2 may be provided with a first bonding portion 2a and a second bonding portion 2b, and the adhesive may be applied to any one or more of the bonding portions 2 .

The polymer is preferably mixed with vinyl acetate, butyl acrylate and polyvinyl alcohol, preferably mixed in the same ratio.

More specifically, the adhesive is prepared by mixing 2.5 parts by weight to 2.6 parts by weight of the water based on 1 part by weight of the polymer. The water is deionized water, and it is preferable to use pure water from which cations such as sodium and calcium, which are inorganic salts, and anions such as chloride ions and sulfate ions are removed.

When less than 2.5 parts by weight of the water is mixed with respect to 1 part by weight of the polymer, the concentration of the adhesive increases, so that it may be difficult to apply the adhesive, and when mixing in excess of 2.5 parts by weight of the water with respect to 1 part by weight of the polymer Since the concentration of the polymer is lowered, there is a risk that the adhesive strength of the adhesive may be lowered.

Next, in the sixth step (S60), the body portion 1 is molded by connecting the bonding portion 2 to which the adhesive is applied. In the molding of the body part 1, as shown in FIG. 3, the first joint part 2a and the second joint part 2b are combined and joined.

More specifically, the joint portion 2 may be provided to be 1/10 to 1/8 the width of the body portion 1 so that the joint portion 2 may be coupled.

Next, in the seventh step (S70), the bonding portion 2 is subjected to heat treatment and compressed. More specifically, in the seventh step (S70), heat treatment is performed on the joint portion 2 joined in the sixth step (S60). The heat treatment of the joint portion 2 is preferably performed at a temperature of 70° C. to 80° C. and a pressure of 50 kgf/cm 2 to 55 kgf/cm 2 for 5 to 10 minutes.

When the heat treatment of the joint portion 2 is carried out at less than 70° C., the temperature may be too low, so that the bonding of the joint portion 2 may be insignificant, and when the heat treatment of the joint portion 2 is carried out in excess of 80 ° C., the body portion (1) may be dissolved, so it is preferable to carry out under the above conditions.

In addition, when the heat treatment of the joint part 2 is carried out at less than 50 kgf/cm 2 pressure, the pressure may be too low, and the joining of the joint part 2 may be insignificant, and the heat treatment of the joint part 2 exceeds 55 kgf/cm 2 pressure. Since the shape of the junction part 2 may be deformed when carrying out, it is preferable to carry out under the above conditions.

In addition, when the heat treatment of the joint portion 2 is performed for less than 5 minutes, the bonding of the joint portion 2 may be insignificant, and when the heat treatment of the joint portion 2 is carried out for more than 10 minutes, the body portion 1 ) can be dissolved, so it is preferable to carry out under the above conditions.

Next, in the eighth step (S80), heat treatment is performed to form the corrugated pipe part 20 in which the wrinkles are generated in the body part 1 . More specifically, in the eighth step (S80), the corrugated pipe portion 20 is formed by heat and pressure treatment in the vertical direction in which the corrugation is formed.

The heat treatment of the corrugated pipe portion 20 in the eighth step (S80) is preferably performed for 10 to 30 minutes at a pressure of 50kgf/cm2 to 55kgf/cm2 at 200 to 230°C. It is preferable that the heat treatment be performed by a hot air method, and further dried with a cold air after the hot air method is finished.

When the heat treatment of the corrugated pipe part 20 is carried out at less than 200 ° C, the temperature is too low, the formation of the corrugated pipe may be insignificant, and when the heat treatment of the corrugated pipe part 20 is carried out in excess of 230 ° C., the corrugated pipe part ( 20) may be dissolved, so it is preferable to carry out under the above conditions.

In addition, when the heat treatment of the corrugated pipe part 20 is carried out at less than 50 kgf/cm 2 pressure, the pressure is too low, the formation of the corrugated pipe part 20 may be insignificant, and the heat treatment of the corrugated pipe part 20 is 55 kgf/cm 2 pressure Since the shape of the corrugated pipe portion 20 may be deformed when carried out in excess of the above, it is preferable to carry out under the above conditions.

In addition, when the heat treatment of the corrugated pipe part 20 is carried out for less than 10 minutes, the formation of the corrugated pipe part 20 may be insignificant, and when the heat treatment of the corrugated pipe part 20 is carried out for more than 30 hours, the wrinkles Since the pipe part 20 may melt, it is preferable to carry out under the above conditions.

Next, the ninth step (S90) is a paper straw in which the corrugated pipe part 20 is formed through the formation of the corrugated pipe part 20, and the injection part 10 that the lips touch and the moving part 30 that the drink touches are generated at the top of the corrugated pipe part 20. eject The paper straws are ejected from the paper straw manufacturing apparatus and then packaged.

It is preferable that the corrugated pipe part 20 is formed so that the length ratio of the injection part 10 and the moving part 30 is 1:3 to 1:3.5.

The corrugated pipe portion 20 is preferably provided to be 1/7 to 1/8 with respect to the entire length of the paper straw to facilitate bending of the paper straw.

Below, using the method for manufacturing corrugated ducted paper straws of the present invention, corrugated tubing paper straws were prepared under various conditions to prepare Examples and Comparative Examples.

[Comparative Example 1]

Comparative Example 1 is a paper straw manufactured by Company A.

[Comparative Example 2]

Comparative Example 2 is a paper straw manufactured by Company A.

[Example 1]

A paper straw is prepared through the first step (S10) to the ninth step (S90) of the present invention, wherein the coating composition is 2 parts by weight of the water, 50w/w% of the water based on 1 part by weight of the heptane It is a paper straw prepared by mixing 1.1 parts by weight of alcohol and 2.1 parts by weight of the 8w/w% alcohol.

[Example 2]

A paper straw is prepared through the first step (S10) to the ninth step (S90) of the present invention, but the coating composition is 1 part by weight of the water, the 50w/w% based on 1 part by weight of the heptane It is a paper straw prepared by mixing 2.0 parts by weight of alcohol and 2.1 parts by weight of the 8w/w% alcohol.

[Example 3]

A paper straw is prepared through the first step (S10) to the ninth step (S90) of the present invention, but the coating composition is 1 part by weight of the water, the 50w/w% based on 1 part by weight of the heptane It is a paper straw prepared by mixing 1.1 parts by weight of alcohol and 3.0 parts by weight of the 8w/w% alcohol.

[Example 4]

A paper straw is prepared through the first step (S10) to the ninth step (S90) of the present invention, but the coating composition is 0.5 parts by weight of the water, the 50w/w% based on 1 part by weight of the heptane It is a paper straw prepared by mixing 1.1 parts by weight of alcohol and 2.1 parts by weight of the 8w/w% alcohol.

[Example 5]

A paper straw is prepared through the first step (S10) to the ninth step (S90) of the present invention, but the coating composition is 1 part by weight of the water, the 50w/w% based on 1 part by weight of the heptane It is a paper straw prepared by mixing 0.5 parts by weight of alcohol and 2.1 parts by weight of the 8w/w% alcohol.

[Example 6]

A paper straw is prepared through the first step (S10) to the ninth step (S90) of the present invention, but the coating composition is 1 part by weight of the water, the 50w/w% based on 1 part by weight of the heptane It is a paper straw prepared by mixing 1.1 parts by weight of alcohol and 1.0 parts by weight of the 8w/w% alcohol.

[Example 7]

A paper straw is prepared through the first step (S10) to the ninth step (S90) of the present invention, but the adhesive is a paper straw prepared by mixing 1.5 parts by weight of the water with respect to 1 part by weight of the polymer.

[Example 8]

A paper straw is prepared through the first step (S10) to the ninth step (S90) of the present invention, but the adhesive is a paper straw prepared by mixing 3.0 parts by weight of the water with respect to 1 part by weight of the polymer.

[Example 9]

In [Example 7], the polymer is a paper straw prepared by mixing 0.5 parts by weight of butyl acrylate and 1 part by weight of polyvinyl alcohol with respect to 1 part by weight of vinyl acetate.

[Example 10]

In [Example 7], the polymer is a paper straw prepared by mixing 1 part by weight of butyl acrylate and 0.5 parts by weight of polyvinyl alcohol with respect to 1 part by weight of vinyl acetate.

[Example 11]

In [Example 7], the polymer is a paper straw prepared by mixing 2 parts by weight of butyl acrylate and 1 part by weight of polyvinyl alcohol with respect to 1 part by weight of vinyl acetate.

[Example 12]

In [Example 7], the polymer is a paper straw prepared by mixing 1 part by weight of butyl acrylate and 2 parts by weight of polyvinyl alcohol with respect to 1 part by weight of vinyl acetate.

[Example 13]

In [Example 8], the polymer is a paper straw prepared by mixing 0.5 parts by weight of butyl acrylate and 1 part by weight of polyvinyl alcohol with respect to 1 part by weight of vinyl acetate.

[Example 14]

In [Example 8], the polymer is a paper straw prepared by mixing 1 part by weight of butyl acrylate and 0.5 parts by weight of polyvinyl alcohol with respect to 1 part by weight of vinyl acetate.

[Example 15]

In [Example 8], the polymer is a paper straw prepared by mixing 2 parts by weight of butyl acrylate and 1 part by weight of polyvinyl alcohol with respect to 1 part by weight of vinyl acetate.

[Example 16]

In [Example 8], the polymer is a paper straw prepared by mixing 1 part by weight of butyl acrylate and 2 parts by weight of polyvinyl alcohol with respect to 1 part by weight of vinyl acetate.

[Example 17]

A paper straw is manufactured through the first step (S10) to the ninth step (S90) of the present invention, but the heat treatment of the joint part 2 in the seventh step (S70) is performed at a temperature of 60° C. and a pressure of 53 kgf/cm 2 It is a paper straw prepared by carrying out for 7 minutes.

[Example 18]

A paper straw is manufactured through the first step (S10) to the ninth step (S90) of the present invention, but the heat treatment of the junction part 2 in the seventh step (S70) is performed at a temperature of 75° C. and a pressure of 45 kgf/cm 2 It is a paper straw prepared by carrying out for 7 minutes.

[Example 19]

A paper straw is manufactured through the first step (S10) to the ninth step (S90) of the present invention, but the heat treatment of the joint part 2 in the seventh step (S70) is performed at a temperature of 75° C. and a pressure of 53 kgf/cm 2 It is a paper straw prepared by carrying out for 3 minutes.

[Example 20]

A paper straw is manufactured through the first step (S10) to the ninth step (S90) of the present invention, but the heat treatment of the joint part 2 in the seventh step (S70) is performed at a temperature of 85° C. and a pressure of 53 kgf/cm 2 It is a paper straw prepared by carrying out for 7 minutes.

[Example 21]

A paper straw is manufactured through the first step (S10) to the ninth step (S90) of the present invention, but the heat treatment of the joint part 2 in the seventh step (S70) is performed at a temperature of 75° C. and a pressure of 58 kgf/cm 2 It is a paper straw prepared by carrying out for 7 minutes.

[Example 21]

A paper straw is manufactured through the first step (S10) to the ninth step (S90) of the present invention, but the heat treatment of the joint part 2 in the seventh step (S70) is performed at a temperature of 75° C. and a pressure of 53 kgf/cm 2 It is a paper straw prepared by carrying out for 13 minutes.

[Example 22]

A paper straw is manufactured through the first step (S10) to the ninth step (S90) of the present invention, but the heat treatment of the corrugated pipe part 20 in the eighth step (S80) is performed at 180° C. at 53 kgf/cm 2 pressure. It is a paper straw made by performing for minutes.

[Example 23]

A paper straw is manufactured through the first step (S10) to the ninth step (S90) of the present invention, but the heat treatment of the corrugated pipe part 20 in the eighth step (S80) is 20 at 215° C. at 48 kgf/cm 2 pressure. It is a paper straw made by performing for minutes.

[Example 24]

A paper straw is manufactured through the first step (S10) to the ninth step (S90) of the present invention, but in the eighth step (S80), the heat treatment of the corrugated pipe part 20 is performed at 215° C. at 53 kgf/cm 2 pressure. It is a paper straw made by performing for minutes.

[Example 25]

A paper straw is manufactured through the first step (S10) to the ninth step (S90) of the present invention, but in the eighth step (S80), the heat treatment of the corrugated pipe part 20 is performed at 245° C. at 53 kgf/cm 2 pressure. It is a paper straw made by performing for minutes.

[Example 26]

A paper straw is manufactured through the first step (S10) to the ninth step (S90) of the present invention, but in the eighth step (S80), the heat treatment of the corrugated pipe part 20 is performed at 215° C. at 60 kgf/cm 2 pressure. It is a paper straw made by performing for minutes.

[Example 27]

A paper straw is manufactured through the first step (S10) to the ninth step (S90) of the present invention, but the heat treatment of the corrugated pipe part 20 in the eighth step (S80) is 40 at 215° C. at 53 kgf/cm 2 pressure. It is a paper straw made by performing for minutes.

[Example 28]

It is a straw manufactured through the first step (S10) to the ninth step (S90) of the present invention.

[Example 29]

A paper straw is manufactured through the first step (S10) to the ninth step (S90) of the present invention, and is a straw manufactured by treating with cold air after heat treatment in the eighth step (S80).

(1) evaluation

For evaluation of water resistance, wet tensile strength and tear resistance were measured according to KS M 7014 and KS M 7068, after putting the paper straws prepared in Comparative Examples and Examples in the same beverage for 24 hours.

division Wet Tensile Strength
(kgf/15mm) bending strength
(episode) division Wet Tensile Strength
(kgf/15mm) bending strength
(episode) Comparative Example 1 2.9 3689 Example 14 2.6 3577 Comparative Example 2 3.0 3712 Example 15 2.5 3568 Example 1 2.8 3670 Example 16 2.5 3573 Example 2 2.7 3678 Example 17 2.7 3698 Example 3 2.5 3664 Example 18 2.6 3690 Example 4 2.4 3682 Example 19 2.7 3701 Example 5 2.5 3666 Example 20 2.8 3705 Example 6 2.6 3672 Example 21 2.9 3706 Example 7 2.5 3513 Example 22 3.0 3705 Example 8 2.6 3561 Example 23 3.0 3709 Example 9 2.4 3573 Example 24 2.9 3710 Example 10 2.5 3570 Example 25 2.9 3705 Example 11 2.5 3569 Example 26 3.0 3706 Example 12 2.6 3563 Example 27 3.0 3705 Example 13 2.5 3578 Example 28 3.3 3715 Example 29 3.4 3720

As shown in Examples 1 to 6 in the results of [Table 1], it can be confirmed that the wet tensile strength is very low when out of the range of the coating composition in the present invention. In addition, as shown in Examples 7 to 16, when the adhesive in the present invention is out of the range, it can be confirmed that the wet tensile strength is lowered and the bending strength is lowered like that out of the range of the coating composition.

As shown in Examples 17 to 21, when compared with Examples 28 and 29 manufactured by the present invention, when out of the heat treatment range of the joint 2, the wet tensile strength is low and the bending strength is also low. As shown in Examples 22 to 27, it was confirmed that, when out of the heat treatment range of the corrugated pipe part 20, the wet tensile strength was low and the bending strength was also low.

By means of solving the above problems, the present invention can provide a method for producing an eco-friendly, recyclable, eco-friendly paper straw that can be decomposed naturally using paper.

In addition, the present invention can provide a method for manufacturing an eco-friendly, eco-friendly paper straw by using an adhesive that is harmless to the human body and can be naturally decomposed.

In addition, the present invention provides a method of manufacturing a paper straw that is easy to bend by forming a corrugated pipe part 20 through compression through heat treatment after cutting the base paper and applying an adhesive to first manufacture it in the form of a straw. can

As such, those skilled in the art to which the present invention pertains will understand that the above-described technical configuration of the present invention may be implemented in other specific forms without changing the technical spirit or essential characteristics of the present invention.

Therefore, the embodiments described above are to be understood as illustrative and not restrictive in all respects, and the scope of the present invention is indicated by the following claims rather than the above detailed description, and the meaning and scope of the claims and their All changes or modifications derived from the concept of equivalents should be construed as being included in the scope of the present invention.

1. body part
2. Joints
2a. first junction
2b. second junction
10. Injection
20. Corrugated pipe part
30. Moving part
S10. The first step of loading the flat paper bundle
S20. A second step of forming the body part 1 by cutting the base paper bundle to a predetermined length
S30. A third step of supplying the body part (1)
S40. A fourth step of coating the body portion 1 by spraying the coating composition, and coating the coating composition after mixing heptane, water, 50% alcohol and 8% alcohol
S50. An adhesive is applied to the junction part 2, which is the end of the coated body part 1, but the adhesive is a polymer mixed with vinyl acetate, butyl acrylate and polyvinyl alcohol. 5th step of applying after mixing with water
S60. A sixth step of molding the body part 1 by connecting the bonding part 2 to which the adhesive is applied.
S70. A seventh step of compressing the joint (2) by heat treatment
S80. Eighth step of performing heat treatment to form the corrugated pipe part 20 in which wrinkles are generated in the body part 1
S90. A ninth step of injecting the paper straw produced by the injection part 10 where the lips touch and the moving part 30 where the beverage touches at the top of the corrugated pipe part 20 through the formation of the corrugated pipe part 20

Claims (5)

A first step of loading a flat sheet bundle;
a second step of forming the body part 1 by cutting the base paper bundle to a predetermined length;
a third step of supplying the body part (1);
A fourth step of coating the body portion 1 by spraying the coating composition, and coating the coating composition after mixing heptane, water, 50w/w% alcohol and 8w/w% alcohol;
An adhesive is applied to the junction part 2, which is the end of the coated body part 1, but the adhesive is a polymer mixed with vinyl acetate, butyl acrylate and polyvinyl alcohol. A fifth step of applying water after mixing;
a sixth step of molding the body part 1 by connecting the bonding part 2 to which the adhesive is applied;
a seventh step of compressing the joint (2) by heat treatment;
an eighth step of performing heat treatment to form a corrugated pipe portion 20 in which wrinkles are generated in the body portion 1; and
A ninth step of injecting the generated paper straw into the injection unit 10 where the lips touch and the moving unit 30 where the beverage touches from the upper end of the corrugated tube portion 20 through the formation of the corrugated tube portion 20; using Corrugated tube paper straw manufacturing method, characterized in that manufactured.
The method of claim 1,
The coating composition,
A method for manufacturing a corrugated paper straw, characterized in that it is prepared by mixing 1 part by weight of the water, 1.1 parts by weight of the 50w/w% alcohol, and 2.1 parts by weight of the 8w/w% alcohol based on 1 part by weight of the heptane.
The method of claim 1,
The adhesive is
Corrugated tube paper straw manufacturing method, characterized in that it is prepared by mixing 2.5 parts by weight to 2.6 parts by weight of the water with respect to 1 part by weight of the polymer.
The method of claim 1,
The heat treatment of the joint part 2 in the seventh step,
A method for manufacturing a corrugated paper straw, characterized in that it is carried out at a temperature of 70°C to 80°C at a pressure of 50kgf/cm2 to 55kgf/cm2 for 5 to 10 minutes.
The method of claim 1,
The heat treatment of the corrugated pipe part 20 in the eighth step,
A method for manufacturing a corrugated paper straw, characterized in that it is carried out for 10 to 30 minutes at a pressure of 50 kgf / cm 2 to 55 kgf / cm 2 at 200 to 230 ° C.

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