WO2004108560A1

WO2004108560A1 - Buffering packing material and making method thereof

Info

Publication number: WO2004108560A1
Application number: PCT/KR2004/001374
Authority: WO
Inventors: Hee-Bong Lim
Original assignee: Hee-Bong Lim
Priority date: 2003-06-10
Filing date: 2004-06-09
Publication date: 2004-12-16
Also published as: KR20040106094A; KR100509810B1

Abstract

Disclosed is a buffering packing material formed of synthetic resin in which check-valve upper and lower sheets are interposed between a lower base sheet and an upper base sheet to have one side width smaller than the base sheets, and then outer sides of the base sheets are heated and adhered, and then a plurality of compartment heating and adhering parts is formed to form a plurality of compartment space parts for respectively filing air thereinto, the packing material including: a continuous band-shaped releasing-agent distribution layer being provided on at least one of contact surfaces of the check-valve upper and lower sheets, and allowing the upper and lower sheets not to be adhered with each other when they are heated and adhered to form the compartment heating and adhering part; and heating and adhering parts provided at the check-valve upper and lower sheets to form an air passage for discharging air, which is introduced from an air supplying passage formed by the releasing-agent distribution layer, to the compartment space part.

Description

BUFFERING PACKING MATERIAL AND MAKING METHOD THEREOF

Technical Field

The present invention relates to a buffering packing material and a making method thereof in which a plurality of compartment space parts formed of synthetic resin is constructed to prevent a leakage of air filled by an internally formed check valve, thereby providing a buffering effect, and more particularly, to a buffering packing material and a making method thereof in which a compartment heating and adhering part is freely positioned with respect to an air passage of a check valve to form a compartment space part, thereby facilitating manufacture and packing variously shaped products.

Background Art

As a general buffering packing material, styropor is commonly used due to its characteristic of a good elasticity and weight-lightness. However, it tends to refrain from using the styropor, due to an environmental contamination. As its substitute, an air-filling packing material formed of synthetic resin has been popularly studied and developed to construct the compartment space part having the check valve such that air is filled into a compartment space part formed of extensible synthetic resin to provide a buffering effect.

A conventional air-filling synthetic resin packing material is disclosed in Japanese Patent Application No. 2001-361971.

Descriptions of Drawings

The above object, other features and advantages of the present invention will become more apparent by describing the preferred embodiment thereof with reference to the accompanying drawings, in which:

Fig. 1 is a partially cut perspective view illustrating a conventional art; Fig. 2 is a development illustrating a process for describing a conventional art of Fig. 1;

Fig. 3 is a development illustrating check-valve sheets for describing a manufacture process according to one embodiment of the present invention;

Fig. 4 is a deployment view of a base sheet and a check- valve sheet for describing a manufacture process according to one embodiment of the present invention;

Fig. 5 is a partially cut perspective view for describing one embodiment of the present invention;

Fig. 6 is a perspective view illustrating another embodiment of the present invention;

Fig. 7 is a plan view illustrating a further another embodiment of the present invention;

Fig. 8 is a section view illustrating a check valve according to another embodiment of the present invention; and Fig. 9 is a development illustrating a further another embodiment of the present invention.

(Disclosure of the Invention) Technical problem Fig. 1 is a partially cut perspective view illustrating a conventional art, and Fig. 2 is a development illustrating a process for describing a conventional art of Fig. 1.

An air-filling synthetic resin packing material 100 is heated and adhered to form a suitable air passage in upper and lower synthetic resin base sheets 1 and check-valve sheets interposed between the base sheets 1. The air-filling synthetic resin packing material 100 includes an outer-side heating and adhering part 2 formed at an exterior of each side; an inner heating and adhering part 3 formed, along the outer-side heating and adhering part 2, at an internal of the outer-side heating and adhering part 2 of four outer-side heatmg and adhering parts; a compartment heating and adhering part 5 formed in a similar vertical direction in the inner heating and adhering part 3; one compartment space part 6 formed to have a buffering effect by air introduced by an outer-side heating and adhering part 2' provided at the other side, the inner heating and adhering part 3, and two compartment heating and adhering part 5; and a planar synthetic resin check valve 7 formed in each compartment space part 6.

In the air-filling synthetic resin packing material 100, if air is injected into an air supplying passage 4 provided between the outer-side heating and adhering part 2 and the inner heatmg and adhering part 3, the air of the air supplying passage 4 is injected into the compartment space part 6 by the check valve 7 provided within each compartment space part 6. Since the air injected into the compartment space part 6 is prevented from being inversely introduced into the air supplying passage 4, the air-filling synthetic resin packing material 100 can have elasticity due to the air injected into the compartment space part 6 to be used as the buffering packing material for electronic products.

In a manufacture process for forming the conventional air-filling synthetic resin packing material 100, as shown in Fig. 2, a rectangular-shaped lower surface base sheet 1' is disposed, and a lower check-valve sheet 70' and an upper check-valve sheet 70" are disposed. The lower check- valve sheet 70' and the upper check-valve sheet 70" has a print part 74 formed at a position at which a non-adhering part 73 is to be formed. The print part 74 is formed to have a predetermined length and a predetermined width in a vertical direction. At this time, the check-valve sheets 70' and 70" have an air passage provided by heating and adhering, to fill air into the compartment space part 6. The check-valve sheets 70' and 70" are disposed to have the same horizontal width as the lower base sheet 1', a less vertical width, a vertical end side 75 disposed between positions at which the outer-side heating and adhering part 2 and the inner heating and adhering part 3 of the lower base sheet 1' are to be formed, and an opposing vertical end side 76 disposed at a forming portion of a sealing compartment part 6. In the above disposal state, the upper base sheet 1" is disposed on the check-valve sheets 70' and 70". At this time, the upper base sheet 1' has the same shape as the lower base sheet 1'.

In the above state, the forming portions of the outer-side heating and adhering parts of four corners, the inner heating and adhering part 3 and the compartment heating and adhering part 5 are heated and adhered. At this time, if the inner heating and adhering part 3 is heated and adhered, the print part 74 of the check-valve sheets 70' and 70" becomes the non-adhermg part 73, due to a releasing property of being separated against heating and adhering at the time of generating the inner heating and adhering part 3, thereby functioning as an air injection hole 71 of the check valve 7. A non-print part becomes an adhering part 72.

The conventional art having the above process and construction is described as follows.

(1) When the sheets 70' and 70" are disposed at the lower base sheet V, the print part 74 should be accurately disposed at a center of the compartment heating and adhering parts 5 to function as the check valve 7. However, since the check-valve sheets 70' and 70" are formed of a thin synthetic resin plate with a predetermined extension, a highly difficult skilled technique is needed to dispose the check-valve sheets 70' and 70". In case where the sheets have a large area, the above difficulty is more added to deteriorate workability.

(2) The check-valve sheets 70' and 70" are generally printed from copperplates. Accordingly, there is a drawback in that a cost is increased since the copperplates are individually manufactured depending on a size, a shape and a print type of the check -valve sheets 70' and 70". (3) Even in case where the compartment heating and adhering part 5 is formed by heating and adhering the check-valve sheets 70' and 70" accurately disposed on the lower base sheet 1', the positions of the sheets are changed due to their extensions such that the air injection hole 71 is not provided at the center of the compartment heating and adhering parts 5, thereby increasing a frequency of inferior goods. (4) Since the air introduced into the check valve through the air supplying passage between the outer-side heating and adhering part 2 and the inner heating and adhering part 3 is introduced into the compartment space part 6, the packing material having the linear- shaped outer-side heating and adhering part 2 is suitable in its manufacture process. In case where the outer-side heatmg and adhering part 2 is curve-shaped, the print part is changed in its heating position along the curve shape, thereby substantially making it difficult to manufacture the packing material.

(5) When the heating positions of the compartment heating and adhering parts 5 are selected and determined, a method of detecting a print position of the print part is employed. Therefore, when a phrase of such as advertisement is inserted into the base sheet 1, the heating positions are erroneously recognized to cause a failure, thereby not freely printing the advertisement phrase and the like.

(6) In case where the compartment space part 5 is different in size due to a regular interval between the compartment heatmg and adhering parts 5, it is difficult to separately manufacture the print copperplates.

Technical Solution An object of the present invention is to provide a buffering packing material and a making method thereof in which a compartment heatmg and adhering part of base sheets can be freely disposed with respect to a check-valve air passage to simplify a work process and reduce a failure ratio. Another object of the invention is to provide a buffering packing material and a making method thereof in which a printing equipment for forming a non-adhering part is widely used at the time of heating and adhering depending on various shapes and types to reduce a manufacture cost.

A further another object of the invention is to provide a buffering packing material and a making method thereof in which an air injection hole of a check valve is freely provided to pack variously shaped products.

A still another object of the invention is to provide a buffering packing material and a making method thereof in which heating positions of the compartment heating and adhering parts are selected and determined independently from the air injection hole of the check valve such that the compartment heating and adhering parts can be formed irrespective of a print mark, thereby freely designing a compartment space part in size and freely inserting an advertisement phrase into the base sheet.

Advantageous Effects The invention having the above objects and constructions has advantageous effects as follows.

(1) In a conventional process of internally forming a heating and adhering part along a linear-shaped outer-side heating and adhering part, injecting air between the outer- side heating and adhering part and the inner heating and adhering part to form an air supplying passage, forming the compartment heating and adhering part to form a compartment space part in the air supplying passage, and forming a check valve to inject air into the compartment space part from the air supplying passage and to prevent the injected air from being returned, a structure not needing the inner heating and adhering part is provided to simplify a process, thereby providing a structural stability and an excellent work efficiency.

(2) The air supplying passage is constructed to form a horizontal print part in the check-valve sheet, thereby simplifying a work process. Further, the air passage of the check-valve sheet is constructed to form the heating and adhering part at a predetermined position without limit to a specific position such that various shapes and structures of buffering packing material can be manufactured. (3) The compartment heating and adhering part can be formed at a predetermined position to improve a work difficulty caused by an extension.

Best Mode

To accomplish the above objects and advantages, there is provided a buffering packing material formed of synthetic resin in which check-valve upper and lower sheets are interposed between a lower base sheet and an upper base sheet to have one side width smaller than the base sheets, and then outer sides of the base sheets are heated and adhered, and then a plurality of compartment heating and adhering parts is formed to form a plurality of compartment space parts for respectively filling air thereinto, the packing material including: a continuous band-shaped releasing-agent distribution layer being provided on at least one of contact surfaces of the check-valve upper and lower sheets, and allowing the upper and lower sheets not to be adhered with each other when they are heated and adhered to form the compartment heating and adhering part; and heating and adhering parts provided at the check-valve upper and lower sheets to form an air passage for discharging air, which is introduced from an air supplying passage formed by the releasing-agent distribution layer, to the compartment space part.

The releasing-agent distribution layer may be formed by printing pigment. The heating and adhering parts may include: first heating and adhering parts streamlined from a peak provided adjacently to the air supplying passage to be horizontally provided along the air supplying passage; and second heating and adhering parts disposed at an end of the air passage of the first heating and adhering parts, for distributing the air.

Circular-shaped heating and adhering parts may be alternatively provided at peaks of the first heating and adhering parts.

According to another aspect of the invention, there is provided a method of manufacturing a buffering packing material, the method including the steps of: disposing check-valve upper and lower sheets on a lower base sheet, the upper and lower sheets having a smaller width than the lower base sheet, having a band-shaped print part formed on a mutual contact surface, and having a heatmg and adhering part for adhering the upper and lower sheets to form an air passage; disposing an upper base sheet having the same size as the lower base sheet, on the check-valve upper sheet; and forming a heating and adhering part at outer sides excepting an outer side of the check-valve upper and lower sheets smaller than the base sheets and at outer sides of the upper base sheet, and forming a heating and adhering part for connecting opposing outer sides of the upper and lower base sheets.

The print part may be positioned within an adhering section of the heating and adhering part for connecting the opposing outer sides, and the print part may function as a releasing agent, at the time of heating and adhering, to adhere only portions excepting the print part.

An interposing sheet may be interposed between the check-valve upper and lower sheets to have a smaller one-side width than the upper and lower sheets.

The present invention will now be described more fully with reference to the accompanying drawings, in which exemplary embodiments of the invention are shown.

Fig. 3 is a development illustrating check-valve sheets for describing a manufacture process according to one embodiment of the present invention.

A check-valve upper sheet 32 is overlapped on a check-valve lower sheet 31 to form a check valve. The upper and lower sheets 32 and 31 have a plate shape and formed of a transparent synthetic resin having general heat adhesiveness. At this time, the sheets 31 and 32 are overlapped in a state in which a horizontal print part 33 is formed on one contact surface of the check-valve lower sheet 31 and the check-valve upper sheet 32. At this time, the print part 33 has a releasing property such that it is not adhered at the time of heating and adhering. Other releasing agents can be also used to obtain the same effect. In this state, the heating and adhering parts (A), (B), (C) and (D) are consecutively formed. The heatmg and adhering part (A) is streamlined with a peak being formed toward a horizontal print part 33. The heating and adhering part (B) is formed adjacently to the heating and adhering part (A). The heating and adhering part (B) maintain the same shape as the heating and adhering part (A), but has a circular heating and adhermg portion at a peak. Further, the heating and adhering part (C) is formed at lower ends of the heating and adhering parts (A) and (B) such that air passing between the heating and adhering parts (A) and (B) can be collided and dispersed. A line-shaped heating and adhering part (D) is regularly disposed at a lower end of the heating and adhering part (C).

It is desirable that the circular heatmg and adhering portion is formed only at one of the peaks of the heating and adhering parts (A) and (B). If the circular heating and adhering portion is formed at all of two peaks, it is difficult to smoothly inject air due to the narrowed air passage when the air is injected, and a pneumatic damage may be caused. If the circular heating and adhering portion is not formed at even any one of the two peaks, an adhesive force of the upper and lower sheets 31 and 32 are weakened, thereby separating the upper and lower sheets 31 and 32 when the air is injected. The heating and adhering parts (A) and (B) are alternatively formed at a lower portion of the horizontal print part 33. The air is injected into a later described compartment space part, through the air passage between the heating and adhering parts (A) and (B), the air passage between the heating and adhering parts (C), and the air passage between the heating and adhering parts (D) that are formed at a lowest portion. Fig. 4 is a deployment view of a base sheet and a check-valve sheet for describing a manufacture process according to one embodiment of the present invention.

The heating and adhermg parts (A), (B), (C) and (D) are formed on the base lower sheet 41 having the plate shape and formed of the synthetic resin. The check-valve upper and lower sheets 31 and 32 having the horizontal print part 33 is disposed on a mutual contact surface. At this time, the check-valve upper and lower sheets 31 and 32 have the same horizontal width as the base lower sheet 41 and have a small vertical width than the base lower sheet 41. Horizontal outer sides of the check-valve upper and lower sheets 31 and 32, at which the horizontal print part 33 is formed, are disposed to be consistent with an outer side 45 of the base lower sheet 41. An opposing horizontal outer side is disposed at an inner side from an opposing outer side of the base lower sheet 41. If the check-valve upper and lower sheets 31 and 32 are completely disposed, the base upper sheet 42 is disposed on the sheets 31 and 32 to complete to dispose the sheets 31 and 32. At this time, the base upper sheet 42 is disposed to face with the base lower sheet 41. The base upper and lower sheets 41 and 42 have an inner surface with the heat adhesiveness, and an outer surface without the heat adhesiveness. The check-valve upper and lower sheets 31 and 32 have the inner and outer surfaces with the heat adhesiveness. After the completion of the disposal of the sheets, the four-corner outer sides of the base upper and lower sheets 41 and

42 are heated and adhered to form the outer-side heating and adhering part 45. And then, the four-corner outer sides are heated and adhered at a predetermine interval and vertically to form the compartment heating and adhering part 43. And then, the air is injected through the air injection hole (not shown) to complete the buffering packing material. At this time, the compartment heating and adhering part 43 and the heating and adhering parts (A), (B), (C) and (D) formed on the check-valve upper and lower sheets 31 and 32 are independent from one another. That is, even in case where the compartment heating and adhering part

43 is overlapped on the heating and adhering parts (A), (B), (C) and (D) formed on the check-valve upper and lower sheets 31 and 32, the air passage is provided without clogging such that a position of the compartment heating and adhering part 43 is not determined by a positions of the heating and adhering parts (A), (B), (C) and (D) formed on the check-valve upper and lower sheets 31 and 32. As shown in Figs. 1 and 2, since the print part 74 is disposed between the conventional compartment heating and adhering parts 5 to provide the air injection hole 71, the positions of the compartment heating and adhering parts 5 should be dependent on the position of the print part 74. However, as shown in Fig. 4 of the present invention, since the position of the compartment heating and adhering part 43 is particularly independent from the positions of the horizontal print part 33 and the heating and adhering parts (A), (B), (C) and (D), the compartment space parts 44 can be formed between the compartment heating and adhering parts 43 to have a different size.

Fig. 5 is a partially cut perspective view for describing one embodiment of the present invention.

If the air is injected through the air injection hole 51, the air flows along the horizontal print part 33 on the check-valve upper and lower sheets. If the base upper and lower sheets are heated and adhered to the check-valve upper and lower sheets to form the compartment heating and adhering part 43, the horizontal print part 33 is not adhered due to its releasing property to provide an air supplying connection hole 52 between the compartment space parts 44. Accordingly, the air supplying passage is formed along the horizontal print part 33. The air is discharged and filled in a space of the base upper and lower sheets within the compartment space part 44, along the air supplying passage that is formed by the heating and adhering parts (A), (B), (C) and (D) formed on the check-valve upper and lower sheets 31 and 32 within the compartment space part 44. In case where the air is no longer injected through the air injection hole 51, the check-valve upper and lower sheets 31 and 32 are in contact with each other not to discharge the air of the compartment space part 44 to the external, thereby allowing the compartment space part 44 to function as a buffering material.

Fig. 6 is a perspective view illustrating another embodiment of the present invention.

An embodiment of Fig. 6 is a circular buffering packing material. Check-valve upper and lower sheets are interposed between disc-shaped upper and lower base sheets to have the same shape as the upper and lower base sheets and to be positioned at an inner side of a circumference outer side of the upper and lower base sheets as cut at a dot line 64. A band-shaped print part 63 is linearly formed at an opposing contact surface of check-valve upper and lower sheets. The upper and lower sheets are heated and adhered to form a heating and adhering part, thereby forming an air passage for allowing the air introduced into the print part 63 to flow. Further, the circumference outer sides of the upper and lower base sheets and the check-valve upper and lower sheets interposed therebetween are heated and adhered to form an outer-side heating and adhering part 67. The compartment heating and adhering part 67 is formed to form a compartment space part 66 approximately vertically to the print part 63. In the above embodiment, if the air is injected into the air injection hole 65 connected to the print part 63, the air is supplied to each compartment space part 66 through the same air supplying connection hole 52, as shown in Fig. 5, formed by the print part 63.

In case where the buffering packing material has a circular-shape, not linear shape, the buffering packing material can be easily manufactured without a difficulty of manufacture by a dependence of the conventional print part and compartment heating and adhering part.

Fig. 7 is a plan view illustrating a further another embodiment of the present invention.

In an embodiment of Fig. 7, a compartment space part 44 is different in size, and the compartment heating and adhering part 43 is different in width. The compartment space part 44 has a width of Δ T at both ends. Remaining compartment space part has a width of Δ t. A compartment heating and adhering part for forming the compartment space part 44 at both ends has a width of Δ g. In case where the compartment heating and adhering part has a large width at both ends, it can be usefully utilized when the compartment space part is bent at both ends for packing. The size of the compartment space part 44 and the width of the compartment heating and adhering part can be differently embodied because the position, the width, and the size of the heating and adhering part can be formed differently and independently from the position of the heating and adhering part formed on the check-valve sheets.

Fig. 8 is a section view illustrating the check valve according to another embodiment of the present invention. The embodiment of the check-valve sheet shown in Fig. 3 much prevents air from being back-drifted by disposing an interposing sheet 81 between the upper and lower sheets 31 and 32 of the check-valve sheet shown Fig. 3. The interposing sheet 81 has the same horizontal width as the check-valve upper and lower sheets 31 and 32, but has a less vertical width and has one outer side that is consistent with an outer side of the check-valve upper and lower sheets 31 and 32. Accordingly, the check-valve upper and lower sheets directly face with each other at a side of an air discharge passage CD of the check-valve upper and lower sheets 31 and 32 in a state where the interposing sheet 81 is not interposed. If the air injection into the check-valve sheets is completed, a phenomenon of air back-drift can be primarily prevented at the air discharge passage ®. Since the air back-drift is secondarily prevented at the interposing sheet, the phenomenon of air back-drift can be more thoroughly prevented.

Fig. 9 is a development illustrating a further another embodiment of the present invention.

A buffering packing material shown in Fig. 9 has upper and lower base sheets with four corners being cut away. The buffering packing material can be usefully utilized due to its easy folding at the time of packing a polyhedral article.

Check-valve upper and lower sheets are interposed between the upper and lower base sheets to have the other sides consistent with each other and have one width smaller than the outer side of the base sheet such as a cut line 92. At this time, a band-shaped print part 93 is formed on an opposing contact surface of the check-valve upper and lower sheets. The check-valve upper and lower sheets are heated and adhered to form the heating and adhering part, thereby forming an air passage.

Further, upper and lower base sheets and the check-valve upper and lower sheets interposed therebetween have outer sides heated and adhered to form an outer-side heating and adhering part 95. A compartment heating and adhering pat 96 is formed to form a compartment space part 91 approximately vertically to the print part 93. If the air is injected into the air injection hole 94 connected to the print part 93 in the above embodiment, the air is supplied to the compartment space part 91 through the same air supplying connection hole 52, shown in Fig. 5, formed by the print part 93.

Industrial Applicability

The inventive buffering packing material with the corners being cut away cannot be achieved in the conventional construction. Since the air supplying passage is formed along the outer side, it is difficult to substantially form the air supplying passage when step coverage with the corners being cut away is provided without linearity in the conventional art. However, the present invention can be easily manufactured, irrespective of the step coverage, since the air supplying passage by the print part 93 is positioned approximately at a center, not along the outer side.

Claims

Claims:

1. A buffering packing material formed of synthetic resin in which check- valve upper and lower sheets are interposed between a lower base sheet and an upper base sheet to have one side width smaller than the base sheets, and then outer sides of the base sheets are heated and adhered, and then a plurality of compartment heating and adhering parts is formed to form a plurality of compartment space parts for respectively filling air thereinto, the packing material comprising: a continuous band-shaped releasing-agent distribution layer being provided on at least one of contact surfaces of the check-valve upper and lower sheets, and allowing the upper and lower sheets not to be adhered with each other when they are heated and adhered to form the compartment heating and adhering part; and heating and adhering parts provided at the check -valve upper and lower sheets to form an air passage for discharging air, which is introduced from an air supplying passage formed by the releasing-agent distribution layer, to the compartment space part.

2. The packing material of claim 1, wherein the releasing-agent distribution layer is formed by printing pigment.

3. The packing material of claim 1 or 2, wherein the heating and adhering parts comprise: first heating and adhering parts stream-lined from a peak provided adjacently to the air supplying passage to be horizontally provided along the air supplying passage; and second heating and adhering parts disposed at an end of the air passage of the first heating and adhering parts, for distributing the air.

4. The packing material of claim 3, wherein circular -shaped heating and adhering parts are alternatively provided at peaks of the first heating and adhering parts.

5. A method of manufacturing a buffering packing material, the method comprising the steps of: disposing check-valve upper and lower sheets on a lower base sheet, the upper and lower sheets having a smaller width than the lower base sheet, having a band-shaped print part formed on a mutual contact surface, and having a heating and adhering part for adhering the upper and lower sheets to form an air passage; disposing an upper base sheet having the same size as the lower base sheet, on the check-valve upper sheet; and forming a heating and adhering part at outer sides excepting an outer side of the check-valve upper and lower sheets smaller than the base sheets and at outer sides of the upper base sheet, and forming a heating and adhering part for connecting opposing outer sides of the upper and lower base sheets.

6. The method of claim 5, wherein the print part is positioned within an adhering section of the heating and adhering part for connecting the opposmg outer sides, and the print part functions as a releasing agent, at the time of heating and adhering, to adhere only portions excepting the print part.

7. The method of claim 5 or 6, wherein an interposing sheet is interposed between the check-valve upper and lower sheets to have a smaller one side width than the upper and lower sheets.