KR20200078747A - Corrugated cardboard and manufacturing method thereof - Google Patents

Abstract

A corrugated cardboard according to an embodiment of the present invention consists of: a film layer made of polyethylene; a silver foil layer made of silver foil and bonded to the upper surface of the film layer; a foam layer made of foamed polyethylene and bonded to the lower surface of the film layer; and a corrugated fabric bonded to the lower surface of the foam layer.

Description

Corrugated cardboard and its manufacturing method{CORRUGATED CARDBOARD AND MANUFACTURING METHOD THEREOF}

The present invention relates to a corrugated cardboard and a method for manufacturing the same, and more particularly, to a corrugated cardboard and a method for manufacturing the same, which can be used to store articles requiring waterproofness, heat retention, and coolability.

In general, articles that require waterproofness and coolness (eg, agricultural products, aquatic products, livestock products, ice cream, etc.) are stored and transported in a box made of styrofoam or corrugated cardboard.

On the other hand, when the box is made of styrofoam, such a styrofoam box can provide excellent waterproofing, heat preservation, and cold insulation effects, and can protect an article stored therein from impact applied from the outside. However, the body of the styrofoam box is manufactured by compression molding to maintain a constant volume to contain the article. Due to this, the styrofoam box can be quite expensive for storage and transportation.

In addition, when the box is made of corrugated cardboard, such a corrugated cardboard box can be easily fabricated and can be stored stacked in an unfolded state, and can be simply assembled and used. Due to this, the cardboard box can reduce the cost of storage and transportation. However, corrugated cardboard is weak to moisture and moisture due to the paper material, and it is difficult to provide heat retention and heat retention.

Technical problem to be achieved by the corrugated cardboard and its manufacturing method according to the technical idea of the present invention is to provide a corrugated cardboard and a method for manufacturing the same to improve water resistance, heat retention, and coolability.

In addition, a technical problem to be achieved by the corrugated cardboard according to the technical idea of the present invention and its manufacturing method is to provide a corrugated cardboard and a method for manufacturing the same which can be easily assembled and reduced in cost when stored and transported when manufactured in a box. .

The technical problem to be achieved by the corrugated cardboard according to the technical idea of the present invention and its manufacturing method is not limited to the above-mentioned problems, and other problems not mentioned will be clearly understood by a person skilled in the art from the following description. .

Corrugated cardboard according to an embodiment of the present invention, the film layer made of polyethylene; A silver foil layer made of silver foil and coupled to an upper surface of the film layer; A foam layer made of foamed polyethylene and bonded to the lower surface of the film layer; And it may be characterized in that it comprises a corrugated fabric bonded to the lower surface of the foam layer.

In addition, in a state where the silver foil layer is bonded to the upper surface of the film layer, the foam layer may be bonded to the lower surface of the film layer, and the corrugated fabric may be bonded to the lower surface of the foam layer.

In addition, the corrugated paper fabric, the first original paper attached to the lower surface of the foam layer; A second original paper spaced from the first original paper and positioned below the first original paper, and corresponding to the first original paper; And a corrugated paper forming an air layer by alternately connecting the first original paper and the second original paper between the first original paper and the second original paper.

Method of manufacturing a corrugated cardboard according to an embodiment of the present invention, (a) a silver foil layer is coupled to the upper surface of the film layer; (b) bonding the film layer to the top surface of the foam layer; (c) forming a corrugated cardboard by bonding the foam layer to the upper surface of the corrugated fabric; (d) cutting the corrugated cardboard by a predetermined length and cutting it into a developed shape of the box; And (e) may be characterized in that it comprises a step of binding in a state in which both sides of the corrugated cardboard in a developed view of the box overlap.

In addition, step (a) may include: (a1) the silver foil layer being unwound and transferred from the first winding roll while being wound on the first winding roll; (a2) the film layer is wound and transferred from the second winding roll while being wound on the second winding roll; (A3) a pair of coating rolls are located between the silver foil layer and the film layer to be transferred, and respectively contacting the lower surface of the silver foil layer and the upper surface of the film layer to apply the adhesive; (a4) It may include the step of overlapping and bonding while passing between the first pressure rolls in a state where the silver foil layer and the film layer are applied with an adhesive.

In addition, (b) step, (b1) the film layer is transferred in a state combined with the silver foil layer; (b2) a step in which the first application roll contacts the lower surface of the film layer to apply an adhesive and guides the film layer between the second pressure rolls in a state of being combined with the silver foil layer; (b3) unwinding from the third winding roll while the foam layer is wound on the third winding roll and being transferred toward between the second press rolls; And (b4) the film layer and the foam layer may be overlapped and combined while passing between the second pressure rolls.

In addition, step (c), (c1) the foam layer is transferred to the third pressure rolls in the state combined with the film layer; (c2) unwinding and conveying from the fourth winding roll while the corrugated fabric is wound on the fourth winding roll; (c3) the second application roll is in contact with the upper surface of the corrugated fabric to apply an adhesive and guide the corrugated fabric between the third press rolls; And (c4) may include the step of overlapping and bonding the corrugated fabric and foam layer passing between the third pressure rolls.

In addition, in step (e), the silver foil layer may be positioned inside, and the corrugated fabric may be positioned outside.

In addition, a pair of coating rolls are positioned in the vertical direction, a plurality of upper contact portions are formed protruding at regular intervals along the circumferential direction and the longitudinal direction of the coating roll on the outer circumferential surface of the coating roll positioned on the upper side, and on the surface of the upper contact portion A plurality of upper grooves are formed, and a plurality of lower contact portions are protruded at regular intervals along the circumferential direction and the longitudinal direction of the coating roll to correspond between the upper contact portions on the outer circumferential surface of the application roll located on the lower side, and the surface of the lower contact portion A plurality of lower grooves are formed, the adhesive is applied to the lower surface of the silver foil layer by the upper contact, and applied to the upper surface of the film layer by the lower contact, the adhesive applied to the silver foil layer and the adhesive applied to the film layer are mutually The liver may not respond.

In addition, discharge holes are formed between the upper contact portions and the lower contact portions of the application rolls, and compressed air may be introduced into the application rolls through the side surfaces of the application rolls and discharged to the outside of the application rolls through the discharge holes. .

Corrugated cardboard according to embodiments of the present invention and a method for manufacturing the same have the following effects.

(1) Water resistance, heat retention, and coolability should be improved.

(2) When manufactured in a box, the cost of storage and transportation is reduced and it can be easily assembled.

However, the effect that can be achieved by the corrugated cardboard according to an embodiment of the present invention and its manufacturing method is not limited to those mentioned above, and other effects not mentioned are clearly understood by those skilled in the art from the following description It could be.

Brief descriptions of each drawing are provided in order to better understand the drawings cited herein.
1 is a perspective view showing a corrugated cardboard according to an embodiment of the present invention.
2 is a cross-sectional view showing a corrugated cardboard according to an embodiment of the present invention.
3 is a flowchart showing a method of manufacturing corrugated cardboard according to an embodiment of the present invention.
4 is a view showing a corrugated cardboard manufacturing method according to an embodiment of the present invention using a corrugated cardboard manufacturing apparatus.
5 is a perspective view showing coating rolls of a corrugated cardboard manufacturing apparatus used in a corrugated cardboard manufacturing method according to an embodiment of the present invention.
6 is a front view and a side view showing coating rolls of a corrugated cardboard manufacturing apparatus used in a corrugated cardboard manufacturing method according to an embodiment of the present invention.

The present invention can be applied to various changes and can have various embodiments, and specific embodiments are illustrated in the drawings and will be described in detail through detailed description. However, this is not intended to limit the present invention to specific embodiments, and it should be understood that the present invention includes all modifications, equivalents, and substitutes included in the spirit and scope of the present invention.

In describing the present invention, when it is determined that a detailed description of related known technologies may unnecessarily obscure the subject matter of the present invention, the detailed description will be omitted. In addition, the numbers (for example, first, second, etc.) used in the description process of the present specification are only identification numbers for distinguishing one component from other components.

In addition, in this specification, when one component is referred to as "connected" or "connected" with another component, the one component may be directly connected to the other component, or may be directly connected, but in particular It should be understood that, as long as there is no objection to the contrary, it may or may be connected via another component in the middle.

In addition, in the present specification, two or more components may be combined into one component, or one component may be divided into two or more for each subdivided function. In addition, each of the components to be described below may additionally perform some or all of the functions of other components in addition to the main functions of the components, and some of the main functions of the components are different. Needless to say, it may also be carried out exclusively by components.

Hereinafter, embodiments according to the technical spirit of the present invention will be described in detail.

1 is a perspective view showing a corrugated cardboard 100 according to an embodiment of the present invention, Figure 2 is a cross-sectional view showing a corrugated cardboard 100 according to an embodiment of the present invention.

1 and 2, the corrugated cardboard 100 according to an embodiment of the present invention may include a film layer 101, a silver foil layer 102, a foam layer 103, and a corrugated cardboard fabric 104. It may be manufactured in a plate shape, or may be manufactured in a box shape.

The film layer 101 is made of a thin film shape and is made of polyethylene (PE). Here, polyethylene is a heat-resistant material that can be easily processed and used in the manufacture of various articles (for example, kitchen utensils, PET bottles, etc.), and is recognized as a relatively safe material because it is hardly discolored even when exposed to sunlight for a long time. It is also used in children's toys.

In addition, polyethylene may be divided into high density, low density, medium density, ultra high density, ultra low density, and the like according to its density. Preferably, the film layer 101 of the present embodiment may be low density polyethylene (LDPE) having a density of 0.91 to 0.94 g/cm 3 in a solid state. In addition, low-density polyethylene is a synthetic resin produced by polymerizing ethylene, and can provide good processability, flexibility and transparency in a transparent solid state at room temperature, and is also used in agricultural/packaging transparent films, wire coatings, and various wraps. The top and bottom surfaces of the film layer 101 have smooth surfaces.

The silver foil layer 102 is formed in a thin film shape and is fixed to the upper surface of the film layer 101. Here, the silver foil layer 102 is made of silver foil, and can be used to improve the waterproofness, heat retention, and heat retention by blocking distribution of air, moisture, and moisture.

The silver foil layer 102 may be bonded to the top surface of the film layer 101 by adhesive or thermal bonding. Here, the silver foil layer 102 is fixed in a state of being superimposed on the top surface of the film layer 101, so that the top surface of the film layer 101 can be closed.

The foam layer 103 is formed in a sheet shape, and is fixed to the lower surface of the film layer 101. Here, the foam layer 103 is made of polyethylene foam (PE foam) or foamed polyethylene produced by foaming polyethylene. For this reason, the foam layer 103 exhibits a good buffering effect against repetitive impacts due to good absorption and resilience to impact energy, and can provide excellent heat retention and heat retention effects due to a significantly low conductivity, and independent foaming agent Therefore, it has little absorbency and hygroscopicity, has strong resistance to chemicals and weather, and shows good processability.

In addition, the upper surface of the foam layer 103 may be bonded to the lower surface of the film layer 101 by an adhesive. Here, the foam layer 103 is fixed in a state of being superimposed on the film layer 101, so that the lower surface of the film layer 101 can be closed.

The corrugated fabric 104 is formed in a sheet shape and is fixed to the lower surface of the foam layer 103. Here, the foam layer 103, the film layer 101, and the silver foil layer 102 are positioned in order to move away from the corrugated fabric 104. In addition, the corrugated paper fabric 104 is made of paper, but includes a first original paper 141, a second original paper 143, and a corrugated paper 145.

The first original paper 141 is made of a thin film shape, and is fixed to the lower surface of the foam layer 103. Here, the upper surface of the first original paper 141 is fixed to the lower surface of the foam layer 103 by an adhesive. Here, the first original paper 141 is fixed to the foam layer 103 in an overlapped state, so that the lower surface of the foam layer 103 can be closed.

The second original paper 143 is spaced apart from the first original paper 141 and is located under the first original paper 141 and corresponds to the first original paper 141. Here, a predetermined space is formed between the second original paper 143 and the first original paper 141. In addition, the second original paper 143 may be formed in a thin film shape like the first original paper 141. The second original paper 143 may have mechanical shock or resistance to climatic conditions together with the first original paper 141.

The bone core 145 connects the first original paper 141 and the second original paper 143 between the first original paper 141 and the second original paper 143. Here, the bone core 145 may be fixed by being alternately coupled to the first original paper 141 and the second original paper 143 while forming a waveform. The first original paper 141 and the second original paper 143 are coated with an adhesive only to the portion where the corrugated paper 145 is in contact, so that the corrugated paper 145 includes the first original paper 141 and the second original paper 143. While connecting, it may be fixed to the first original paper 141 and the second original paper 143.

The first original paper 141 and the second original paper 143 may be kept apart from each other by the corrugated paper 145. Here, the corrugated fabric 104 has a predetermined thickness and may be formed in a sturdy structure with flexibility. In addition, elasticity against compression may be imparted to the corrugated fabric 104 during impact.

The corrugated paper fabric 104 as described above is composed of a structure including a first original paper 141, a second original paper 143, and a corrugated paper 145, while using paper which is a material having a relatively small weight, and having high compression. Can indicate strength.

The corrugated cardboard 100 of the present embodiment has a structure laminated in the order of the corrugated fabric 104, the foam layer 103, the film layer 101, and the silver foil layer 102. Here, since the silver foil layer 102 and the film layer 101 are made of silver and polyethylene, respectively, it is possible to impart waterproofness, heat retention, and heat retention.

In particular, when the corrugated cardboard 100 is made of a box used for storing and transporting goods, the silver foil layer 102 of the corrugated cardboard 100 forms the inner surface of the box, and the corrugated fabric of the corrugated cardboard 100 ( The second original sheet 143 of 104) may form the outer surface of the box. The article stored in the box can be protected through shock absorption by the corrugated fabric 104 and the foam layer 103 and can be kept in a warm or cold state. In addition, moisture and moisture due to the article may not deform the corrugated cardboard 100 because it does not penetrate into the corrugated fabric 104 by the silver foil layer 102 and the film layer 101. Due to this, the corrugated cardboard 100 of the present embodiment can provide waterproofness, heat retention, and cold insulation, and when it is made of a box, it is possible to protect an article stored inside the box from impact applied from the outside and stacked state It can be stored and transported to reduce the cost of storage and transport.

3 is a flowchart illustrating a method of manufacturing corrugated cardboard according to an embodiment of the present invention, and FIG. 4 is a diagram showing a method of manufacturing corrugated cardboard according to an embodiment of the present invention using a corrugated cardboard manufacturing apparatus 10, 5 is a perspective view showing the coating rolls 12a of the corrugated cardboard manufacturing apparatus 10 used in the corrugated cardboard manufacturing method according to an embodiment of the present invention, and FIG. 6 is used for the corrugated cardboard manufacturing method according to an embodiment of the present invention It is a front view and a side view showing the coating rolls 12a of the corrugated cardboard manufacturing apparatus 10.

3 and 4, the corrugated cardboard manufacturing method according to an embodiment of the present invention is a method of manufacturing the aforementioned corrugated cardboard 100 using the corrugated cardboard manufacturing apparatus 10, the corrugated cardboard manufacturing apparatus 10 ) And the components of the corrugated cardboard 100 will be described.

First, a step (S101) in which the silver foil layer 102 is coupled to the upper surface of the film layer 101 is performed. In step S101, the silver foil layer 102 is transferred while being unwound from the first winding roll 11a while being wound on the first winding roll 11a, and the film layer 101 is wound while being wound on the second winding roll 11b. It is transferred while being released from the second winding roll 11b. A pair of coating rolls 12a are positioned between the silver foil layer 102 and the film layer 101 to be transferred, and the coating rolls 12a are respectively provided on the lower surface of the silver foil layer 102 and the upper surface of the film layer 101. Each adhesive is applied in contact. The silver foil layer 102 and the film layer 101 are guided toward the first pressure rolls 13a by the induction rolls 12a', respectively, and overlap while passing between the first pressure rolls 13a. The first pressure rolls 13a are fixed by pressing the silver foil layer 102 and the film layer 101 by bonding to each other by an adhesive.

On the other hand, in step S101, when the silver foil layer 102 and the film layer 101 pass between the first pressure rolls 13a, the first pressure rolls 13a undergo heat while the silver foil layer 102 and the film layer (101) can be pressurized. That is, the silver foil layer 102 and the film layer 101 may be combined in a thermal bonding manner without adhesive.

Subsequently, a step S102 in which the film layer 101 is coupled to the top surface of the foam layer 103 is performed. In step S102, the film layer 101 is transferred through the first pressure rolls 13a in a state of being combined with the silver foil layer 102. Here, the first coating roll 12b is in contact with the lower surface of the film layer 101 to apply an adhesive, and the film layer 101 is guided between the second pressure rolls 13b together with the silver foil layer 102. do. Further, the foam layer 103 is unrolled from the third winding roll 11c while being wound on the third winding roll 11c, and is transferred toward between the second pressure rolls 13b.

The film layer 101 and the foam layer 103 combined with the silver foil layer 102 overlap while passing between the second pressure rolls 13b. The second pressure rolls 13b are fixed by bonding the film layer 101 and the foam layer 103 by an adhesive by pressing the silver foil layer 102, the film layer 101, and the foam layer 103. On the other hand, since the foam layer 103 is made of foamed polyethylene, in order to minimize absorption of the adhesive, the adhesive is not applied directly to the foam layer 103.

Subsequently, the foam layer 103 is attached to the upper surface of the corrugated fabric 104 to form the corrugated cardboard 100 (S103). In step S103, the foam layer 103 is passed through between the second pressure roll (13b) in a state combined with the film layer 101 is transferred toward the third pressure roll (13c). Further, the corrugated fabric 104 is transferred while being unwound from the fourth take-up roll 11d while being wound on the fourth take-up roll 11d, and the second coating roll 12c is the upper surface of the corrugated fabric 104 (ie, It is brought into contact with the first original paper 141) to apply the adhesive and guide the corrugated paper fabric 104 toward the third pressure rolls 13c.

The foam layer 103 combined with the silver foil layer 102 and the film layer 101 and the corrugated fabric 104 overlap while passing between the third pressure rolls 13c. The third pressure rolls 13c press the silver foil layer 102, the film layer 101, the foam layer 103, and the corrugated fabric 104 to bond the foam layer 103 and the corrugated fabric 104 by an adhesive. And fix it. For this reason, the foam layer 103, the film layer 101, and the silver foil layer 102 are sequentially stacked on the upper surface of the corrugated fabric 104, thereby forming the corrugated cardboard 100. On the other hand, since the foam layer 103 is made of foamed polyethylene, in order to minimize absorption of the adhesive, the adhesive is not applied directly to the foam layer 103.

Subsequently, the corrugated cardboard 100 is cut by a predetermined length, and a step S104 is performed in which the box is cut into a developed shape. In step S104, the corrugated cardboard 100 passes through the cutter 14 after passing between the third pressure rolls (13c). Here, the cutter 14 is positioned in a direction orthogonal to the conveying direction of the corrugated cardboard 100 and may be formed in the form of a knife moving in the vertical direction.

When the corrugated cardboard 100 passes the cutter 14 by a predetermined length, the corrugated cardboard 100 is cut by the cutter 14 and has a predetermined length. The cut corrugated cardboard 100 is cut by the cutter 15 in the shape of a developed view of the box. Here, the cutting machine 15 is located on the upper side of the cut corrugated cardboard 100, may be made of a plurality of knives arranged to correspond to the edge of the developed view of the box to be cut. When the cutting machine 15 is in contact with the cut corrugated cardboard 100, the corrugated cardboard 100 may be cut into a developed shape of a box.

Subsequently, a step (S105) is performed in which both sides of the corrugated cardboard 100 having a developed view of the box are bound together. In step S105, the corrugated cardboard 100 in the shape of a developed view of the box overlaps, and both sides of the corrugated cardboard 100 overlap. Here, the both sides of the expanded view-shaped corrugated cardboard 100 of the box mean both ends of the portion forming the side of the box in the expanded-shaped corrugated cardboard 100 of the box. In addition, the silver foil layer 102 is positioned inside the corrugated cardboard 100 of the expanded view of the overlapped box, and the corrugated fabric 104 is located outside.

In addition, both sides of the corrugated cardboard 100 overlapping each other are fixed by the binding machine 16. Here, the binding machine 16 is formed in the form of a stapler or the like, and can fix both sides of the corrugated cardboard 100 using an iron needle. Due to this, the corrugated cardboard 100 can be easily assembled into a box in a cut and cut state.

The corrugated cardboard manufacturing method of this embodiment manufactures corrugated cardboard 100 laminated in the order of corrugated fabric 104, foam layer 103, film layer 101, and silver foil layer 102. Here, since the silver foil layer 102 and the film layer 101 are made of silver and polyethylene, respectively, it is possible to impart waterproofness, heat retention, and heat retention.

In particular, the corrugated cardboard 100 may be cut in the shape of a developed view of the box, and both sides may overlap, and the silver foil layer 102 may overlap. When the corrugated cardboard 100 is made of a box used for storing and transporting goods, the silver foil layer 102 of the corrugated cardboard 100 forms the inner surface of the box, and the corrugated cardboard fabric 104 of the corrugated cardboard 100 The second original paper 143 may form the outer surface of the box. The article stored in the box can be protected through shock absorption by the corrugated fabric 104 and the foam layer 103 and can be kept in a warm or cold state. In addition, moisture and moisture due to the article may not deform the corrugated cardboard 100 because it does not penetrate into the corrugated fabric 104 by the silver foil layer 102 and the film layer 101. For this reason, the corrugated cardboard manufacturing method of the present embodiment can provide waterproofness, heat retention, and cold insulation, and when it is made of a box, it is possible to protect an article stored inside the box from impact applied from the outside and in a stacked state. It can be stored and transported to manufacture a corrugated cardboard 100 that can reduce the cost of storage and transport.

On the other hand, as shown in Figures 5 and 6, a pair of coating rolls (12a) of step S101 is located in the vertical direction. Here, the coating roll 12a (hereinafter referred to as the upper coating roll 12a) positioned on the upper side is in contact with the lower surface of the silver foil layer 102 to apply an adhesive, and the coating roll 12a positioned below (hereinafter) , The lower coating roll (12a) is applied to the adhesive on the upper surface of the film layer 101.

A plurality of upper contact portions 12aa protrude from the outer circumferential surface of the upper coating roll 12a, and the upper contact portions 12aa are formed to be spaced apart at regular intervals along the circumferential direction and the longitudinal direction of the upper coating roll 12a. In addition, a plurality of upper grooves 12aa' are formed on the surface of the upper contact portion 12aa.

The adhesive is applied to the upper application roll 12a with the upper contact portion 12aa as the center, and only the surface of the upper contact portion 12aa contacts the lower surface of the silver foil layer 102. For this reason, an adhesive is applied to the lower surface of the silver foil layer 102 so that the surface of the upper contact portion 12aa is brought into contact with the upper contact portion 12aa. Here, the adhesive is applied to the lower surface of the silver foil layer 102 to be spaced apart at regular intervals along the length and width directions of the silver foil layer 102 by the upper contact portion 12aa. On the other hand, when the surface of the upper contact portion 12aa contacts the lower surface of the silver foil layer 102, no adhesive is applied to the portion of the silver foil layer 102 corresponding to the upper grooves 12aa'.

A plurality of lower contact portions 12ab are protruded on the outer circumferential surface of the lower coating roll 12a, and the lower contact portions 12ab are formed to be spaced apart at regular intervals along the circumferential direction and the longitudinal direction of the lower coating roll 12a. Here, the lower contact portion 12ab is positioned to correspond between the upper contact portions 12aa along the longitudinal direction of the lower application roll 12a. In addition, a plurality of lower grooves 12ab' are formed on the surface of the lower contact portion 12ab.

The adhesive is applied to the lower application roll 12a around the lower contact portion 12ab, and only the surface of the lower contact portion 12ab is in contact with the upper surface of the film layer 101. For this reason, an adhesive is applied to the upper surface of the film layer 101 so that the surface of the lower contact portion 12ab is in contact and corresponds to the lower contact portion 12ab. Here, the adhesive is applied to the upper surface of the film layer 101 so as to be spaced apart at regular intervals along the longitudinal direction and the width direction of the film layer 101 by the lower contact portion 12ab. In addition, the adhesive applied to the film layer 101 is positioned to be staggered with the adhesive applied to the silver foil layer 102 and does not correspond. On the other hand, when the surface of the lower contact portion 12aa contacts the lower surface of the film layer 101, no adhesive is applied to the portion of the film layer 101 corresponding to the lower grooves 12ab'.

In the state in which the adhesive is applied to the silver foil layer 102 and the film layer 101 by the pair of application rolls 12a as described above, the adhesive of the silver foil layer 102 is not applied to the adhesive film layer 101 ), and the adhesive of the film layer 101 is positioned to correspond to the silver foil layer 102 to which no adhesive is applied.

When the silver foil layer 102 and the film layer 101 as described above overlap each other, the adhesive of the silver foil layer 102 bonds the film layer 101 to which the adhesive is not applied to the silver foil layer 102, and the film The adhesive of the layer 101 bonds the silver foil layer 102 to which the adhesive is not applied to the film layer 101. In addition, the overlapping film layer 101 and the silver foil layer 102 are pressed by the first pressure rolls 13a, so that the adhesive spreads along the longitudinal direction of the film layer 101 and the silver foil layer 102, and the film layer ( 101) and the entire surface of the silver foil layer 102.

In this embodiment, even if the adhesive is not entirely applied to the silver foil layer 102 and the film layer 101 using the pair of application rolls 12a as described above, the adhesive is applied to the silver foil layer 102 and the film layer 101. It can be distributed throughout to allow the silver foil layer 102 and the film layer 101 to be combined. Due to this, since the adhesive is applied only to the upper contact portion 12aa and the lower contact portion 12ab, the amount of adhesive applied to the application rolls 12a can be reduced, in particular, the upper grooves 12aa' and the lower grooves ( 12ab') can further reduce the amount of adhesive applied to the upper contact portion 12aa and the lower contact portion 12ab. Therefore, the present embodiment allows the film layer 101 of the silver foil layer 102 to be bonded as a whole using an adhesive, while significantly saving the adhesive used.

Further, discharge holes 12a" are formed in the coating rolls 12a, respectively. The discharge holes 12aa are located between the upper contact portions 12aa and the lower contact portions 12ab. When compressed air flows into the interior of the application rolls 12a through the side surfaces of the compressed air, the compressed air is discharged to the outside of the application rolls 12a through the discharge holes 12a". When the adhesive is applied in addition to the upper contact portion 12aa and the lower contact portion 12ab in the process of being applied to the application rolls 12aa, compressed air is discharged through the discharge holes 12a" to apply between the upper contact portions 12aa. It is possible to prevent adhesion of the adhesive to the application roll 12a between the roll 12a and the lower contact portions 12ab.

As described above, the technical idea of the present invention has been described in detail with reference to preferred embodiments, but the technical idea of the present invention is not limited to the above embodiments and has ordinary knowledge in the art within the scope of the technical idea of the present invention. Various modifications and changes are possible by the ruler.

100: corrugated cardboard
101: film layer
102: silver foil layer
103: foam layer
104: corrugated fabric
10: corrugated cardboard manufacturing apparatus

Claims (10)

A film layer made of polyethylene;
A silver foil layer made of silver foil and coupled to an upper surface of the film layer;
A foam layer made of foamed polyethylene and bonded to the lower surface of the film layer; And
Corrugated cardboard, characterized in that it comprises a corrugated fabric bonded to the lower surface of the foam layer.
According to claim 1,
Corrugated cardboard, characterized in that the silver foil layer is bonded to the upper surface of the film layer, the foam layer is bonded to the lower surface of the film layer, the corrugated fabric is bonded to the lower surface of the foam layer.
According to claim 1, Corrugated fabric,
A first original paper attached to the lower surface of the foam layer;
A second original paper spaced from the first original paper and positioned below the first original paper, and corresponding to the first original paper; And
A corrugated cardboard comprising a corrugated paper forming an air layer by alternately connecting the first and second original papers between the first and second original papers.
(A) step of bonding the silver foil layer to the upper surface of the film layer;
(b) bonding the film layer to the top surface of the foam layer;
(c) forming a corrugated cardboard by bonding the foam layer to the upper surface of the corrugated fabric;
(d) cutting the corrugated cardboard by a predetermined length and cutting it into a developed shape of the box; And
(E) a method of manufacturing a corrugated cardboard comprising the step of bundling both sides of the corrugated cardboard in the form of a developed view of the box.
The method of claim 4, step (a),
(a1) the silver foil layer is wound and transferred from the first winding roll while being wound on the first winding roll;
(a2) the film layer is wound and transferred from the second winding roll while being wound on the second winding roll;
(A3) a pair of coating rolls are located between the silver foil layer and the film layer to be transferred, and respectively contacting the lower surface of the silver foil layer and the upper surface of the film layer to apply the adhesive;
(a4) The method of manufacturing a corrugated cardboard comprising the steps of overlapping and bonding while passing between the first pressure rolls in a state where the silver foil layer and the film layer are applied with an adhesive.
The method of claim 4, step (b),
(b1) transferring the film layer in a state in which it is combined with the silver foil layer;
(b2) a step in which the first application roll contacts the lower surface of the film layer to apply an adhesive and guides the film layer between the second pressure rolls in a state of being combined with the silver foil layer;
(b3) unwinding from the third winding roll while the foam layer is wound on the third winding roll and being transferred toward between the second press rolls; And
(b4) a method of manufacturing a corrugated cardboard comprising the steps of overlapping and bonding the film layer and the foam layer while passing between the second press rolls.
The method of claim 4, step (c),
(c1) a step in which the foam layer is transferred toward the third press rolls in a state of being combined with the film layer;
(c2) unwinding and conveying from the fourth winding roll while the corrugated fabric is wound on the fourth winding roll;
(c3) the second application roll is in contact with the upper surface of the corrugated fabric to apply an adhesive and guide the corrugated fabric between the third press rolls; And
(c4) corrugated cardboard fabric and foam layer is passed through the third pressure roll, characterized in that it comprises a step of overlapping and bonding.
According to claim 4, In step (e),
The method of manufacturing corrugated cardboard, wherein the silver foil layer is located inside and the corrugated fabric is located outside.
The method of claim 5,
A pair of application rolls are positioned in the vertical direction,
A plurality of upper contact portions protrude at regular intervals along the circumferential direction and the longitudinal direction of the application roll, and a plurality of upper grooves are formed on the surface of the upper contact portion, on the outer circumferential surface of the application roll located on the upper side,
A plurality of lower contact portions protrude at regular intervals along the circumferential direction and the longitudinal direction of the application roll to correspond between the upper contact portions on the outer circumferential surface of the lower application roll, and a plurality of lower grooves are formed on the surface of the lower contact portion. ,
The adhesive is applied to the lower surface of the silver foil layer by the upper contact, and applied to the upper surface of the film layer by the lower contact, characterized in that the adhesive applied to the silver foil layer and the adhesive applied to the film layer do not correspond to each other. Method of manufacturing a corrugated cardboard, characterized by.
The method of claim 9,
Discharge holes are formed between the upper contact portions and the lower contact portions of the coating rolls,
Compressed air is introduced into the interior of the coating rolls through the side of the coating rolls, characterized in that discharged to the outside of the coating rolls through the discharge holes.

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