KR102496076B1 - Method for manufacturing upcycling paper leather using waste paper sack and waste fabric and upcycling paper leather manufactured by this method - Google Patents

Abstract

The present invention relates to a method for manufacturing upcycled paper leather using a waste paper sack and waste fabric, and upcycled paper leather manufactured by the method. More specifically, a waste paper sack is applied with glue, waste fabric is compressed on the waste paper sack, and the waste paper sack is applied with waterproof coating liquid and then dried so that paper leather with enhanced tensile strength and waterproofness is manufactured. Therefore, the waste paper sack and the waste fabric, which are difficult to recycle, can be upcycled as leather, to prevent environmental pollution and waste of resources.

Description

Method for producing upcycling paper leather using waste paper bags and waste cloth, and upcycling paper leather manufactured by this method

The present invention relates to a method for producing upcycling paper leather using waste paper bags and waste cloth, and an upcycling paper leather manufactured by this method. Prevent environmental pollution and waste of resources by compressing and applying waterproof coating liquid to waste paper bags and drying to manufacture paper leather with enhanced tensile strength and waterproofness, so that waste paper bags and waste cloth, which are difficult to recycle, can be used as leather. It relates to a method for producing upcycling paper leather that can be used, and an upcycling paper leather manufactured by this method.

According to waste statistics such as national waste generation and treatment status as of 2019 provided by the public data portal, 57,961 tons of waste are generated in Korea per day, among which 4,992 tons of waste paper and 914 tons of waste fibers are generated. Among them, 475 tons of waste paper and waste fibers are only 70 tons, and waste paper and waste fibers that cannot be recycled are disposed of by incineration or landfill.

A typical example of waste paper that cannot be recycled is paper bags, and since paper bags are coated with paper to increase durability, most of them are not recycled and are classified as general waste.

Accordingly, various reuse plans have been proposed to utilize waste paper bags that cannot be recycled, but due to the nature of paper, which is the main material of waste paper bags, there are limitations in their utilization due to the disadvantages of being easily torn or weak to moisture.

In addition, fabrics used for bedding in hotels, etc., are devalued and discarded when contamination or durability deterioration occurs due to long-term use.

The use of carbon dioxide, water, and electricity generated in the waste disposal process of waste paper bags and waste streams reaches a considerable amount, which is a major cause of environmental pollution. It is very necessary to develop a technology for eco-friendly resource utilization to circulate resources and prevent environmental pollution.

Therefore, the problem to be solved by the present invention is to prevent resource waste and environmental pollution by improving the value and circulating and utilizing resources by manufacturing paper leather with improved tensile strength and waterproofness by utilizing waste paper bags and waste streams that are difficult to recycle. An object of the present invention is to provide a method for manufacturing upcycling paper leather that can be recycled and an upcycling paper leather manufactured by this method.

In order to solve the above problems, a method for manufacturing upcycling paper leather using waste paper bags and waste cloth according to an embodiment of the present invention includes applying an adhesive paste containing vinyl acetate to one side of the waste paper bags; Placing waste cloth on the surface of the waste paper bag to which the adhesive paste is applied and then compressing the waste cloth; Applying a waterproof coating liquid to the opposite side of the side on which the waste cloth of the waste paper bag is compressed; and drying the applied waterproof coating liquid in contact with air at room temperature to prepare upcycling paper leather.

In one embodiment of the present invention, the waterproof coating liquid is varnish, and the drying step may include drying at room temperature for 5 to 15 minutes.

In another embodiment of the present invention, the waterproof coating liquid is soybean oil, and the drying step may include drying at room temperature for 20 hours to 28 hours.

A method for manufacturing upcycling paper leather using waste paper bags and waste cloth according to an embodiment of the present invention for solving the above other problems includes applying an adhesive paste containing vinyl acetate to one side of the waste paper bags; Placing waste cloth on the surface of the waste paper bag to which the adhesive paste is applied and then compressing the waste cloth; Manufacturing two or more waste paper bags in which waste cloth is compressed by repeating the above steps; bonding the two or more prepared waste paper bags in which the waste cloth is compressed to each other in such a way that the side of the waste paper bag on which the waste cloth is compressed is adhered to the opposite side of the side on which the waste cloth of the other waste paper bag is compressed; Applying a waterproof coating liquid to the opposite side of the side on which the waste cloth of the adhered waste paper bag is compressed; and drying the applied waterproof coating liquid by contacting air.

The upcycling paper leather manufactured in one embodiment of the present invention may have a thickness of 0.8 mm or more.

Other embodiment specifics are included in the detailed description.

The present invention has an effect of preventing resource waste and environmental pollution by manufacturing upcycling paper leather with improved tensile strength and waterproofness by utilizing waste paper bags and waste cloth, which are difficult to recycle.

Effects of the present invention are not limited by the contents exemplified above, and more diverse effects are included in the present specification.

1 is a flowchart of an upcycling paper leather manufacturing method using waste paper bags and waste cloth according to an embodiment of the present invention.
2 is a flowchart of an upcycling paper leather manufacturing method using waste paper bags and waste cloth according to another embodiment of the present invention.
3 is a photograph of a bag made using upcycling paper leather manufactured according to an embodiment of the present invention.

Advantages and features of the present invention, and how to achieve them, will become clear with reference to the detailed description of the following embodiments. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in a variety of different forms, and only the embodiments make the disclosure of the present invention complete, and those skilled in the art in the art to which the present invention belongs It is provided to fully inform the person of the scope of the invention, and the invention is only defined by the scope of the claims.

Terminology used herein is for describing the embodiments and is not intended to limit the present invention. In this specification, 'and/or' includes each and every combination of one or more of the recited items. In addition, singular forms also include plural forms unless otherwise specified in the text. The terms 'comprises' and/or 'comprising' used in the specification do not exclude the presence or addition of one or more other elements other than the mentioned elements. Numerical ranges expressed using '-' or 'to' represent numerical ranges including the values listed before and after them as lower and upper limits, respectively, unless otherwise specified. 'About' or 'approximately' means a value or range of values within 20% of the value or range of values set forth thereafter.

Also, terms such as first, second, A, B, (a), and (b) may be used to describe components of an embodiment of the present invention. These terms are only used to distinguish the component from other components, and the nature, order, or order of the corresponding component is not limited by the term.

Unless otherwise defined, all terms (including technical and scientific terms) used in this specification may be used in a meaning commonly understood by those of ordinary skill in the art to which the present invention belongs. In addition, terms defined in commonly used dictionaries are not interpreted ideally or excessively unless explicitly specifically defined.

And, in describing the embodiments of the present invention, if it is determined that a detailed description of a related known configuration or function hinders understanding of the embodiments of the present invention, the detailed description will be omitted.

Hereinafter, the present invention will be described in detail.

1 is a flowchart of an upcycling paper leather manufacturing method using waste paper bags and waste cloth according to an embodiment of the present invention.

Referring to FIG. 1, the method for manufacturing upcycling paper leather using a waste paper bag and waste cloth includes applying adhesive paste to one side of the waste paper bag (S10), and compressing waste cloth on one side of the waste paper bag coated with adhesive paste (S20). ), applying a waterproof coating liquid to the opposite side of the side on which the waste cloth of the waste paper bag is compressed (S30), and drying the waterproof coating liquid in the air (S40).

Step of applying the adhesive glue to the waste paper bag (S10)

Adhesive paste is a mixture of adhesive and water, and the adhesive may be made of vinyl acetate resin as a main raw material, and may be harmless to the human body without phthalate and volatile organic compounds.

The adhesive and water may be mixed at a weight ratio of 10:0.6-1.2, and more preferably at a weight ratio of 10:0.9.

Waste paper bags may be discarded after being used as rice bags, grain bags, cement bags, and sugar bags, and may be made of kraft paper.

The waste paper bag may be wrinkled and irregularities removed by applying heat and pressure in order to enhance the waste cloth and compression force.

Step of squeezing waste cloth (S20)

In the waste paper bag, the waste cloth can be compressed on the side where the adhesive paste is applied.

The waste cloth may be wrinkled and uneven by applying heat and pressure to facilitate compression with a waste paper bag.

Waste cloth may be discarded after being used for clothing, tablecloths, curtains, and bed sheets, and may be made of linen. Compression may be compression using a rolling pin so that there is no exfoliation between the waste paper bag and the waste cloth. In the case of using a rolling pin, a compression device may be used, but a person may directly press the rolling pin so as to minimize the use of electricity and water.

Applying a waterproof coating solution (S30)

The waterproof coating liquid can be applied to the opposite side of the waste paper bag where the waste cloth is compressed, and the waterproof coating liquid can be applied before the adhesive paste applied to the waste paper bag is completely dried, and it does not take time for the adhesive paste to dry, thereby reducing the process time. can be shortened.

The waterproof coating liquid is used to overcome the limitations of waterproofness, and can make the texture of paper feel soft and tough like leather.

When paper leather is used as a material for daily necessities such as bags, soybean oil or varnish may be used as the waterproof coating solution to increase its utilization by having a waterproof function.

Soybean oil not only absorbs well when applied to paper, but also has the property of not easily absorbing water as a hydrophobic material. When soybean oil is applied to a waste paper bag, it prevents the paper from absorbing moisture and improves waterproofness. And after the soybean oil is dried, the tensile strength can be improved by the coagulability of the soybean oil.

Varnish is a transparent coating agent that prevents discoloration, mold prevention, and moisture absorption to improve waterproofness and durability of leather, and after drying, it can enhance tensile strength by coagulation of the coating agent.

Step of drying the waterproof coating solution (S40)

The waterproof coating solution can be dried by bringing the surface to which the waterproof coating solution is applied in a waste paper bag in contact with air.

The drying of the waterproof coating liquid is carried out at room temperature, and the drying time can be shortened if the temperature is raised by using electric energy or a warm air dryer is used. However, since unnecessary energy is used, it can be naturally dried without arbitrarily adjusting the temperature. .

The drying time of the waterproof coating liquid may be adjusted according to the characteristics of the coating liquid, and when the waterproof coating liquid is varnish, it may be dried for 5 minutes to 15 minutes, preferably 5 minutes to 10 minutes. When the waterproof coating liquid is soybean oil, it can be dried for 20 hours to 28 hours, preferably for 24 hours to 28 hours.

The method for manufacturing upcycling paper leather using waste paper bags and waste cloth as described above may further include removing the coated surface of the waste paper bags.

The upcycling paper leather according to an embodiment of the present invention may be manufactured by the method described above, and specifically, may have a thickness of 0.8 mm or more.

The thickness may be preferably 0.8 mm or more and 2.0 mm or less. More preferably, it may be 0.8 mm or more and 1.6 mm or less.

If the thickness is thinner than the above standard, the shape preservation power of the product using it may be lowered, and if it is thicker than the above standard, the force required for sewing is required to be higher, and the difference in energy such as electricity may become significant when making a product using it.

For example, to sew paper leather of 0.8 mm or more and less than 2.0 mm, sewing can be done with a sewing machine capable of fabric sewing machine, whereas, to sew paper leather of 2.0 mm or more, a sewing machine capable of leather machine is required, and the power consumption, etc. this may increase.

Next, referring to FIG. 2, looking at the upcycling paper leather manufacturing method using waste paper bags and waste cloth, the same method as steps S10 and S20 of FIG. Through the step of adhering the paper bags to each other (S60), the step of applying a waterproof coating solution to the waste paper bags (S70), and the step of drying the waterproof coating solution (S80), upcycling paper leather using waste paper bags and waste cloth can be manufactured. can

Adhesion of waste paper bags (S60)

Two or more waste paper bags in which the waste cloth is compressed may be adhered, and the side on which the waste cloth is compressed in the first waste paper bag and the surface on which the waste cloth is not compressed in the second waste paper bag may be adhered to each other.

Two or more waste paper bags can be adhered, preferably two waste paper bags can be adhered.

Adhesive glue may be used for the adhesive, and the adhesive glue may be the same as that used in step S10, which is a mixture of adhesive and water. It may be harmless to the human body.

Applying a waterproof coating solution (S70)

In the first waste paper bag, a waterproof coating liquid may be applied to the opposite side of the side on which the waste cloth is compressed.

The process of applying the waterproof coating solution is the same as the step (S30) of applying the waterproof coating solution of FIG. 1, so a detailed description thereof will be omitted.

Step of drying the waterproof coating solution (S80)

The waterproof coating solution may be dried by bringing the surface to which the waterproof coating solution is applied in the first waste paper bag in contact with air.

Since the step of drying the waterproof coating solution is the same as the step (S40) of drying the waterproof coating solution of FIG. 1, a detailed description thereof will be omitted.

The upcycling paper leather according to the embodiment of FIG. 2 of the present invention may be manufactured by the method described above, and specifically may have a thickness of 1.5 mm or more.

The upcycling paper leather manufactured in the same way as above uses waste paper bags and waste streams to be discarded, thereby reducing waste generation and preventing the waste of resources because there is no need to produce new paper or cloth for paper leather manufacturing. there is.

In addition, environmental pollution can be prevented by reducing the use of electricity and water energy required for waste treatment or production of raw materials and reducing the amount of carbon dioxide.

Example 1

1) Preparation of waste paper bag and waste cloth

Waste paper bags were collected and prepared from rice bags, and waste cloth was collected from bed sheets used in hotels.

The coated surface of the collected waste paper bags was removed, and the inlay was cut into 46 cm wide and 42 cm long, and the waste cloth was cut into 50 cm wide and 46 cm long.

2) Manufacture of adhesive paste

An adhesive paste was prepared by mixing Gokubond's 205 glue containing vinyl acetate resin and water at a weight ratio of 10:0.9.

3) Application of adhesive paste

15 g of the prepared adhesive glue was applied to one side of the cut waste paper bag.

4) Compression of waste cloth in a waste paper bag

The waste cloth was placed on the surface of the waste paper bag coated with adhesive glue and pressed with a rolling pin.

5) Soybean oil application and drying

Before the adhesive paste was dried, 8 g of soybean oil was applied to the opposite side of the side on which the waste cloth was compressed in a waste paper bag, and natural drying was performed at a temperature of 25 ° C for 24 hours.

Example 2

1) Prepare two waste paper bags in which waste cloth is compressed.

Two waste paper bags in which waste cloth was compressed were prepared in the same manner as in steps 1) to 4) in Example 1.

2) Attach 2 waste paper bags

15 g of adhesive glue was applied to the side of the second waste paper bag on which the waste cloth was not compressed, and then adhered to the side on which the waste cloth of the first waste paper bag was compressed.

3) Soybean oil application and drying

Before the adhesive glue was dried, 8 g of soybean oil was applied to the opposite side of the side on which the waste cloth of the first waste paper bag was compressed, and natural drying was performed at 25 ° C. for 24 hours.

Example 3

Waste paper bags were collected and prepared from rice bags, and waste cloth was collected from bed sheets used in hotels.

The coated surface of the collected waste paper bags was removed, and the inlay was cut into 46 cm wide and 42 cm long, and the waste cloth was cut into 50 cm wide and 46 cm long.

2) Manufacture of adhesive paste

An adhesive paste was prepared by mixing Gokubond's 205 glue containing vinyl acetate resin and water at a weight ratio of 10:0.9.

3) Application of adhesive paste

15 g of the prepared adhesive glue was applied to one side of the cut waste paper bag.

4) Compression of waste cloth in a waste paper bag

The waste cloth was placed on the surface of the waste paper bag coated with adhesive glue and pressed with a rolling pin.

5) Varnish application and drying

Before the adhesive paste was dried, 8 g of varnish was applied to the opposite side of the side on which the waste cloth was compressed in a waste paper bag, and natural drying was performed at 25 ° C. for 10 minutes.

Example 4

1) Prepare two waste paper bags in which waste cloth is compressed.

Two waste paper bags in which waste cloth was compressed were prepared in the same manner as in Steps 1) to 4) in Example 3.

2) Attach 2 waste paper bags

15 g of adhesive paste was applied to the side of the second waste paper bag on which the waste cloth was not compressed, and then adhered to the side on which the waste cloth of the first waste paper bag was compressed.

3) Varnish application and drying

Before the adhesive paste was dried, 8 g of varnish was applied to the opposite side of the side on which the waste cloth of the first waste paper bag was compressed, and natural drying was performed at 25 ° C. for 24 hours.

Comparative Example 1

Waste paper bags were prepared by collecting those used as rice bags, removing the coated surface, and cutting the inlay into 46 cm wide and 42 cm long.

Comparative Example 2

Two waste paper bags prepared in the same manner as in Comparative Example 1 were prepared, and the two waste paper bags were adhered and dried.

Comparative Example 3

8 g of soybean oil was applied to one side of the waste paper bag prepared in the same manner as in Comparative Example 1, and natural drying was performed at 25 ° C for 24 hours.

Comparative Example 4

Two waste paper bags prepared in the same manner as in Comparative Example 2 were prepared, 8 g of soybean oil was applied to one side of the waste paper bags, and natural drying was performed at 25 ° C for 24 hours.

Comparative Example 5

8 g of varnish was applied to one side of the waste paper bag prepared in the same manner as in Comparative Example 1, and natural drying was performed at 25 ° C. for 10 minutes.

Comparative Example 6

Two waste paper bags prepared in the same manner as in Comparative Example 2 were prepared, 8 g of varnish was applied to one side of the waste paper bags to which they were adhered, and natural drying was performed at 25 ° C for 10 minutes.

Comparative Example 7

Waste cloth was prepared by collecting bed sheets used in hotels and cutting them into 50 cm wide and 46 cm long.

Comparative Example 8

Two waste cloths prepared in the same manner as in Comparative Example 7 were prepared, and the two waste cloths were adhered and dried.

Experimental example

division waste paper bag lung waterproof coating liquid 2 layers Example 1 ○ ○ ○ (soybean oil) - Example 2 ○ ○ ○ (soybean oil) ○ Example 3 ○ ○ ○ (varnish) - Example 4 ○ ○ ○ (varnish) ○ Comparative Example 1 ○ - - - Comparative Example 2 ○ - - ○ Comparative Example 3 ○ - ○
(soybean oil) - Comparative Example 4 ○ - ○
(soybean oil) ○ Comparative Example 5 ○ - ○
(varnish) - Comparative Example 6 ○ - ○
(varnish) ○ Comparative Example 7 - ○ - - Comparative Example 8 - ○ - ○

waterproof test

In the waterproofing test, 200 ml of water was poured into the center of the sample at once, left for 30 minutes, and then the amount of water permeated and the volume of water remaining in the center were measured.

division Volume of permeated water (ml) Volume of water remaining in the center (ml) Example 1 18 134 Example 2 0 158 Example 3 16 138 Example 4 0 161 Comparative Example 1 161 25 Comparative Example 2 101 68 Comparative Example 3 72 118 Comparative Example 4 55 126 Comparative Example 5 68 120 Comparative Example 6 48 129 Comparative Example 7 167 0 Comparative Example 8 132 0

As can be seen from the above experimental results, in Examples 1 to 4 in which the waste paper bag and the waste cloth were adhered and the waterproof coating liquid was applied, the water did not permeate or the amount of permeation was significantly greater than that of Comparative Examples 1 to 4. It is easy to see that the water resistance is improved according to the fact that it is less. In addition, looking at Examples 2 and 4, it can be seen that the waterproofness is improved compared to Examples 1 and 3 consisting of a single layer, and looking at Comparative Examples 3 to 6, compared to Comparative Examples 1 and 2 in which the waterproof coating liquid was not applied. It can be seen that the waterproofness is improved.

In addition, when comparing Comparative Examples 2, 4, and 6 with Comparative Examples 1, 3, and 5, it can be seen that waterproofness is improved when two layers are adhered rather than single layers.

Comparative Example 7 and Comparative Example 8 are single-layered waste cloth or two-layer waste cloth, and the amount of water permeation is greater than that of other examples or comparative examples. It can be seen that the water resistance of 4 to 4 is excellent.

Tensile strength test

In the tensile strength test, 10 adult males and 10 adult females between the ages of 20 and 50 were given each sample, and force was applied to the center of the sample to determine whether ① the sample could be torn and ② if the sample was torn, the strength of the force was 1. After responding to which intensity was applied on a scale of 1 to 100, the average of the intensity was calculated.

division ① Number of respondents who responded that they could tear ② Intensity of Average Force Example 1 0 - Example 2 0 - Example 3 0 - Example 4 0 - Comparative Example 1 20 17 Comparative Example 2 18 42 Comparative Example 3 20 28 Comparative Example 4 18 48 Comparative Example 5 20 26 Comparative Example 6 18 51 Comparative Example 7 2 88 Comparative Example 8 0 -

As can be seen in the above experiment, Comparative Examples 1 to 6 made of only waste paper bags were tearable by all or most of the respondents who participated in the experiment, and when made of only waste paper, two respondents were able to tear. On the other hand, the lung Examples 1 to 4, in which the paper bag and the waste cloth are combined, have a tensile strength that is difficult for ordinary adult men and women to tear without any tools. It can be seen that the tensile force is increased when the adhesive is present.

In addition, when Comparative Example 3 and Comparative Example 5 were compared with Comparative Example 1, the respondents were able to tear Comparative Example 1 with a lower strength than Comparative Example 3 and Comparative Example 5, and Comparative Example 2 was able to tear Comparative Example 4 and Comparative Example It can be confirmed that the tensile force is enhanced when the waterproof coating liquid is applied according to the fact that it could be torn with a force of less intensity compared to 6.

As can be seen in the above experiment, the case where the waste paper bag and the waste cloth are adhered has higher waterproofness and tensile strength than the case consisting only of the waste paper bag or waste cloth. can

In the case of a waterproof coating liquid, varnish has an effect of superior waterproofness and a shorter drying time than soybean oil, and soybean oil has an effect of increasing tensile strength compared to varnish.

texture experiment

In the texture experiment, 10 adult men and 10 adult women aged 20 to 50 were given cowhide cut to the same size as Examples 1 and 3 and Comparative Examples 1 and 7, and blindfolded to determine the texture of each sample. After having them feel it, they were asked to respond to the type of material they felt in each sample.

division paper cloth leather etc Example 1 5 2 11 2 Example 3 3 2 14 One Comparative Example 1 18 0 0 2 Comparative Example 7 0 20 0 0 cowhide 0 2 17 One

As can be seen in the above experiment, when general adult men and women cover their eyes and distinguish each sample by the texture felt only by touch, it can be confirmed that Examples 1 and 3 feel a texture closer to leather than paper or cloth.

Furthermore, when compared with Comparative Example 1 and Comparative Example 7, it can be seen that Example 1 and Example 3 have the effect of showing leather texture than general waste paper and waste cloth.

Although the above has been described with reference to the embodiments of the present invention, this is only an example and does not limit the present invention, and those skilled in the art to which the present invention belongs will be able to It will be appreciated that various modifications and applications not exemplified above are possible.

For example, each component specifically shown in the embodiment of the present invention can be modified and implemented. And differences related to these variations and applications should be construed as being included in the scope of the present invention as defined in the appended claims.

Claims (5)

(a) applying adhesive paste containing vinyl acetate to one side of a waste paper bag;
(b) arranging the waste cloth on the surface of the waste paper bag on which the adhesive paste is applied and compressing the waste cloth;
(c) applying varnish to the opposite side of the side on which the waste cloth of the waste paper bag is compressed; and
(d) allowing the applied varnish to come into contact with air at room temperature and drying for 5 to 15 minutes
A method for producing upcycling paper leather comprising a. delete (a) applying adhesive paste containing vinyl acetate to one side of a waste paper bag;
(b) arranging the waste cloth on the surface of the waste paper bag on which the adhesive paste is applied and compressing the waste cloth;
(c) applying soybean oil to the opposite side of the side on which the waste cloth of the waste paper bag is compressed; and
(d) allowing the coated soybean oil to come into contact with air at room temperature and drying for 20 to 28 hours
A method for producing upcycling paper leather comprising a. (a) applying adhesive paste containing vinyl acetate to one side of a waste paper bag;
(b) arranging the waste cloth on the surface of the waste paper bag on which the adhesive paste is applied and compressing the waste cloth;
(c) repeating steps (a) and (b) to produce two or more waste paper bags in which waste cloth is compressed;
(d) bonding the two or more prepared waste paper bags in which the waste cloth is compressed to each other in such a way that the side of the waste paper bag on which the waste cloth is compressed is adhered to the opposite side of the side on which the waste cloth of another waste paper bag is compressed;
(e) applying a waterproof coating solution to the surface opposite to the side on which the waste cloth of the adhered waste paper bag is compressed; and
(f) drying the applied waterproof coating liquid by contacting it with air
Method for manufacturing upcycling paper leather comprising delete

Images