KR101764885B1 - Manufacturing method for air-cap with multilayer-film and air-cap thereof - Google Patents

Manufacturing method for air-cap with multilayer-film and air-cap thereof Download PDF

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Publication number
KR101764885B1
KR101764885B1 KR1020160025640A KR20160025640A KR101764885B1 KR 101764885 B1 KR101764885 B1 KR 101764885B1 KR 1020160025640 A KR1020160025640 A KR 1020160025640A KR 20160025640 A KR20160025640 A KR 20160025640A KR 101764885 B1 KR101764885 B1 KR 101764885B1
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KR
South Korea
Prior art keywords
film
multilayer film
air
layer
resin
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KR1020160025640A
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Korean (ko)
Inventor
이호성
Original Assignee
주식회사 중원지.엘.비
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Priority to KR1020160025640A priority Critical patent/KR101764885B1/en
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Publication of KR101764885B1 publication Critical patent/KR101764885B1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C39/00—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor
    • B29C39/14—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor for making articles of indefinite length
    • B29C39/20—Making multilayered or multicoloured articles
    • B29C39/203—Making multilayered articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C59/00—Surface shaping of articles, e.g. embossing; Apparatus therefor
    • B29C59/02—Surface shaping of articles, e.g. embossing; Apparatus therefor by mechanical means, e.g. pressing
    • B29C59/022—Surface shaping of articles, e.g. embossing; Apparatus therefor by mechanical means, e.g. pressing characterised by the disposition or the configuration, e.g. dimensions, of the embossments or the shaping tools therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D7/00—Producing flat articles, e.g. films or sheets
    • B29D7/01—Films or sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2791/00—Shaping characteristics in general
    • B29C2791/004—Shaping under special conditions
    • B29C2791/006—Using vacuum

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Laminated Bodies (AREA)

Abstract

The present invention relates to a method for producing a multilayer film, comprising the steps of: (a) preparing a multilayered film laminated by five or more layers by independently and simultaneously spraying three or more polymer resins; (b) forming a protrusion on the multilayer film produced in step (a); (c) forming an air layer by bonding a lower film to a lower surface of the multilayer film having the protrusions formed in the step (b); And (d) bonding a top film to an upper surface of the multi-layer film having the air layer formed in step (c), wherein the polymer resin is selected from the group consisting of nylon, polyurethane, polyethylene, Wherein the resin is selected from the group consisting of polypropylene, ethylene-vinyl acetate, and the like.
The method for producing an air cap formed of a multilayer film according to the present invention is a method for producing an air cap by simultaneously and independently spraying three or more polymer resins to produce a multilayer film laminated in five or more layers, Therefore, it is possible to manufacture an air cap which exhibits excellent buffering effect because the air layer is not damaged even when the impact or continuous weight is applied due to the enhanced tensile strength of the multilayered film.

Description

[0001] The present invention relates to a manufacturing method of an air cap formed of a multilayer film,

The present invention relates to a method of manufacturing an air cap formed of a multilayer film and an air cap manufactured thereby.

The air-cap is referred to as a bubble wrap or a so-called 'bubble wrap', and a plurality of air layers including air are formed. When an impact is received from the outside, the impact is mitigated by the air layer It is used as a cushioning material so that the impact is not transmitted to the wrapping object. In addition, the air cap has an effect of cutting off heat due to an air layer formed therein, and as such a heat insulating effect has recently been known, it is used as a heat insulating material which adheres to a window or a glass exposed to the outside, thereby blocking external cold or heat.

However, conventionally used air caps tend to be torn when the impact is applied suddenly or the weight is continuously applied because the tensile strength of the formed film is low, and thus the air layer is broken and the buffering effect is reduced there is a problem.

In order to solve such a problem, there has been disclosed a technique relating to an air cap which has conventionally been bonded in multiple layers to increase buffering effect.

For example, Korean Patent Laid-Open No. 10-2015-0087573 discloses a technology of an air cap having high durability by forming a multi-layer structure by joining a first raw fabric and a second raw fabric having an air cap formed thereon.

However, in the above-described technique, the tensile strength of the fabric itself is similar to that of the conventional technology, so that when the impact is suddenly applied or the weight is continuously applied, the fabric may be torn in the same manner.

Accordingly, there is a need for a method of manufacturing an air cap with improved durability because it is not torn easily even when a sudden shock is applied or a weight is continuously applied as a cushioning material capable of mitigating the impact.

Korean Published Patent Application No. 2015-0087573 (Disclosure Date: Jul. 30, 2015) Korean Laid-open Patent Publication No. 2015-0081041 (Publication date: July 13, 2015) Korean Registered Patent No. 1086978 (Published on November 29, 2011) Korean Registered Utility Model No. 0267371 (Notification Date: Mar. 12, 2002)

Disclosure of the Invention The present invention has been made to solve the above-described problems, and it is an object of the present invention to provide an air bag which is not easily torn even when an impact is applied or a weight is continuously applied, To provide a method of manufacturing an air cap and a technical content of the durable air knife manufactured thereby.

According to an aspect of the present invention, there is provided a method of manufacturing a multilayer film, including: (a) preparing a multilayered film laminated in five or more layers by independently and simultaneously spraying three or more polymer resins; (b) forming a protrusion on the multilayer film produced in step (a); (c) forming an air layer by bonding a lower film to a lower surface of the multilayer film having the protrusions formed in the step (b); And (d) bonding the upper surface film to the upper surface of the multilayer film having the air layer formed in step (c), wherein the polymer resin is selected from the group consisting of nylon, polyurethane, polyethylene, poly Wherein the resin is selected from the group consisting of polypropylene, ethylene-vinyl acetate, and the like.

The multilayer film is formed to include a core layer, an intermediate layer formed on each of the upper and lower surfaces of the core layer, and an outer layer formed on the surface of the intermediate layer that is not in contact with the core layer, And can be formed of the same polymer resin.

The core layer is formed using nylon resin or urethane resin.

The intermediate layer is characterized by being formed using an ethylene-vinyl acetate resin or a polypropylene resin.

Further, the outer layer is formed by using a polyethylene resin or a polypropylene resin.

Also, the upper surface film or the lower surface film is characterized by using a multilayer film produced by the same method as in the step (a).

In the step (b), the multilayer film is adsorbed on the outer circumferential surface of the adsorption roller having a plurality of adsorption holes formed on the outer surface thereof to form protrusions.

In addition, the present invention provides an air cap manufactured by the above-described method.

The method for producing an air cap formed of a multilayer film according to the present invention is a method for producing an air cap by simultaneously and independently spraying three or more kinds of polymer resins to produce a multilayer film laminated in five or more layers, Therefore, it is possible to manufacture an air cap which exhibits excellent buffering effect because the air layer is not damaged even when the impact or continuous weight is applied due to the enhanced tensile strength of the multilayered film.

Further, the air cap formed of the multilayer film according to the present invention is formed by applying a multilayer film having a core layer formed of a material having a low gas permeability so that the gas inside the air layer does not flow out to the outside, It is excellent in the effect of blocking heat transmission due to the air in the air layer and exhibits an excellent effect as a heat insulating material.

1 is a process diagram for a method of manufacturing an air cap according to the present invention.
2 is a perspective view of an overall structure of an air cap according to the present invention.
FIG. 3 is a conceptual view showing a method of manufacturing a multilayered film laminated by five layers by simultaneously spraying three different polymer resins according to an embodiment of the present invention.
4 is a cross-sectional view of a multilayer film according to the present invention.

Hereinafter, the present invention will be described in detail.

The present invention relates to a method for producing a multilayer film, comprising the steps of: (a) preparing a multilayer film laminated by five or more layers by independently and simultaneously spraying three or more kinds of polymer resins; (b) (C) forming an air layer by bonding a bottom film (10) to the lower surface of the multilayer film (20) having the protrusions formed in the step (b); and (d) Bonding the upper surface film (30) to the upper surface of the multi-layer film (20) formed with the upper surface film (30).

More specifically, step (a) is a step of producing a multilayer film 20 in which five or more layers are laminated by simultaneously spraying three or more polymer resins independently as shown in FIG. 3, wherein three or more polymer resins The multilayer film 20 in which five or more heteropolymer resins are stacked can be manufactured.

As a method for producing the polymer resin in the film in this step, various conventionally known methods for producing a polymer film can be used.

For example, the multilayered film 20 can be manufactured in a single process by laminating different kinds of polymer resin layers formed by independently and simultaneously spraying using a guide roll.

As another example, it is also possible to further include a cooling member capable of being cooled in a heterogeneous polymer resin layer which is independently injected at the same time, cooling the polymer resin layer to form each film layer, pressurizing and heating it to form a multilayer film 20).

The polymer resin forming the multilayer film 20 will be described in more detail. The polymer resin used in the present step may be nylon, polyurethane, polyethylene, polypropylene, ethylene-vinyl Ethylene-vinyl acetate can be used.

The polymer resin may be a liquid or powder, and may be formed by selectively controlling the thickness of a film formed by controlling the amount of the resin to be injected.

Also, it is possible to inject the polymer resin in a state in which the polymer resin is not mixed with each other, and the polymer resin is injected at the same time when the nozzles are injected. A film can be produced. The film formed by spraying from the Ti-die may be pressed and laminated by a guide roll or may be configured to simultaneously perform cooling and pressurization using a cooling roll equipped with a cooling function. Layer film of the present invention.

The multilayer film 20 manufactured in this step can be formed by laminating five or more layers of polymer resin, and preferably includes a film layer in which five layers of polymer resin are laminated.

The multilayer film 20 includes a core layer 210, an intermediate layer 220, and an outer layer 230 as shown in FIG. 4, and each of the layers may be formed of a different kind of polymer resin, It can be formed from the same polymer resin.

The core layer 210 is formed at the center of the multilayer film 20 and nylon or polyurethane resin may be selected as the core layer 210 according to the use of the air cap 1.

The nylon resin has a high pinhole property that does not cause fine pores and has a low gas permeability and can prevent the air contained in the air layer from flowing out. The polyurethane resin has properties of high toughness, low temperature flexibility, abrasion resistance and transparency have.

The intermediate layer 220 may be disposed on the upper surface or the lower surface of the core layer 210. The intermediate layer 220 may be formed of polypropylene or an ethylene-vinyl acetate resin.

The polypropylene resin has high moisture resistance and transparency and is excellent in mechanical strength to improve tensile strength. The ethylene-vinyl acetate resin serves as a bonding agent for bonding the core layer 210 to the outer layer 230 , And elasticity and resilience can be imparted so as to return to the original state even in the case of a sudden bending for packaging.

The outer layer 230 may be positioned on the upper surface or the lower surface of the intermediate layer 220, and may be formed of the outer layer 230 by selecting polyethylene or polypropylene resin.

The polyethylene resin or polypropylene resin has good workability and tensile strength and is not easily broken by impact. Various polyolefin resins including polyethylene resin or polypropylene resin can be selected depending on the use.

The multilayer film 20 including the core layer 210, the intermediate layer 220 and the outer layer 230 may be formed by laminating a film formed of the different kind of polymer resin, The multilayered film 20 thus produced is not easily torn and has a low air permeability and thus has an advantage in that an internal air is not leaked to the outside even if an external force is applied to the air layer during its manufacture with the air cap .

In the step (b), the protrusions are formed on the multilayer film 20 manufactured in the step (a), and the protrusions formed in this step are bonded to the bottom film 10 to be described later, Thereby forming an air layer containing air.

The method of forming the protrusions in this step can be formed by various commonly used methods, and a typical example is a method of forming protrusions by using a device equipped with a suction roller or a press roller.

For example, in the case of forming a protrusion on the multilayer film 20 using a device equipped with a suction roller, the multilayer film 20 of the step (a) produced by injection from a Ti-die has a plurality of adsorption The holes are vacuum-adsorbed by the adsorption rollers, and the multilayered film 20 can be formed in the form of adsorption holes by the force of adsorption in vacuum.

In another example, a plurality of protrusions protruding from the outer circumferential surface constitute a press roller formed along the outer circumferential surface and a recess roller formed to engage with the protruded protrusions, so that the multilayer film (20) is pressed and heated between the press roller A method of forming protrusions on the multilayer film 20 can be used.

In the step (c), the lower film 10 is bonded to the lower surface of the multilayer film 20 having the protrusions formed in the step (b), and the protrusions and the lower film 10 are bonded to each other to contain air inside the protrusions In this step, the lower film (10) is placed on the lower surface of the multilayer film (20) so that the lower film (10) is engaged with the air layer. .

The step (d) is a step of bonding the top film 30 to the top surface of the multi-layer film 20 bonded in the step (c). In this step, the top film 30 is bonded to the upper surface of the multilayer film 20 to manufacture the air cap 1, and on the upper surface of the multilayer film 20, the surface area exposed to the outside is reduced so that the air layer formed in the protrusion shape is not damaged by the external force, The film 30 can be bonded and protected.

Meanwhile, the top film 30 and the bottom film 10 may use a single film made of the above-mentioned polymer resin, and in order to further improve the tensile strength and durability, the multi-layer film produced in the step (a) The upper surface film 30 and the lower surface film 10 can be utilized.

Accordingly, the durability and the tensile strength are improved, so that even when used for packing heavy objects, the buffering effect is excellent. In addition, the air in the air layer formed in the cushioning material or the air cap can not easily flow out to the outside, An air cap can be manufactured.

The method for producing an air cap formed of a multilayer film according to the present invention is a method for producing an air cap by simultaneously and independently spraying three or more kinds of polymer resins to produce a multilayer film laminated in five or more layers, Therefore, it is possible to manufacture an air cap which exhibits excellent buffering effect because the air layer is not damaged even when the impact or continuous weight is applied due to the enhanced tensile strength of the multilayered film.

Further, the air cap formed of the multilayer film according to the present invention is formed by applying a multilayer film having a core layer 210 formed of a material having a low gas permeability so that the gas inside the air layer does not flow out to the outside, It has excellent effect of cutting off heat transmission due to air in air layer with low thermal conductivity and shows excellent effect as a heat insulating material.

<Examples>

The liquid polymer resin formed by melting the nylon resin as the core layer, the ethylene-vinyl acetate resin as the intermediate layer and the polyethylene resin as the outer layer was sprayed simultaneously through a Ti-die having nozzles capable of independently spraying, A film was prepared.

The prepared multi-layer film was vacuum-adsorbed by an adsorption hole formed on the outer circumferential surface of the adsorption roller to form protrusions, and the lower film was produced in the same manner as the method for producing the multi-layer film, A lower film was bonded to the lower surface of the multilayer film to form an air layer.

Further, a polyethylene film formed of a polyethylene resin was pressed and heat bonded to the upper surface of the multilayer film to produce an air cap formed of a multilayer film.

<Test Example>

In order to evaluate the durability of the air cap specimen (30 cm in width, 30 cm in length) manufactured as described above, the durability of the air cap was evaluated by pressing the front face of the air cap 100 times repeatedly with a force of 100 N,

As a result, it was confirmed that the air cap produced by the manufacturing method of the present invention does not generate an air layer which is broken even by repeatedly pressing the air cap 100 times, and the air cap of the conventional air cap breaks the air layer close to 30% In the same test, it was confirmed that the air cap formed of the multilayer film had higher durability than the conventional air cap.

Further, compared to the conventional air cap in which an air layer is broken when an object having a weight of 5 kg or more is placed at a temperature of 60 DEG C or more at the temperature of 60 DEG C or more, air produced by the method of manufacturing an air cap formed by the multilayer film according to the present invention It was confirmed that the cap has no durability of the air layer and has improved durability.

1: Air cap 10: Lower film
20: multilayer film 30: upper surface film
210: core layer 220: middle layer
230:

Claims (8)

1. A method of manufacturing an air cap formed of a multilayer film,
(a) at least three polymer resins selected from the group consisting of nylon, polyurethane, polyethylene, polypropylene, and ethylene-vinyl acetate; The multilayered structure including the core layer, the intermediate layer formed on each of the upper and lower surfaces of the core layer, and the outer layer formed on the surface of the intermediate layer that is not in contact with the core layer, Producing a film;
(b) forming a protrusion on the multilayer film produced in the step (a);
(c) forming an air layer by bonding a lower film to a lower surface of the multilayer film having the protrusions formed in the step (b); And
(d) bonding the upper surface film to the upper surface of the multilayer film having the air layer formed in the step (c)
Wherein the laminate structure of the multilayer film improves the durability and the tensile strength to improve the buffering effect and the multilayer film is formed with protrusions to form an air layer to improve the heat insulating effect. A method for manufacturing an air cap formed of a film.
delete The method according to claim 1,
Wherein the core layer comprises:
Wherein the film is formed using a nylon resin or a polyurethane resin.
The method according to claim 1,
Wherein the intermediate layer comprises:
Ethylene-vinyl acetate resin, or a polypropylene resin. &Lt; RTI ID = 0.0 &gt; 11. &lt; / RTI &gt;
The method according to claim 1,
Wherein the outer layer comprises:
Wherein the film is formed using a polyethylene resin or a polypropylene resin.
The method according to claim 1,
The upper surface film or the lower surface film may be formed,
Wherein the multi-layer film is formed using a multilayer film produced in the same manner as in the step (a).
The method according to claim 1,
The step (b)
Layer film is formed by adsorbing a part of the multilayer film along an outer circumferential surface of the adsorption roller by using a suction roller having a plurality of suction holes formed on an outer surface of the multilayer film to form a protrusion on the multilayer film / RTI &gt;
An air cap manufactured by using the method for manufacturing an air cap formed of the multilayer film according to any one of claims 1 to 7.
KR1020160025640A 2016-03-03 2016-03-03 Manufacturing method for air-cap with multilayer-film and air-cap thereof KR101764885B1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102522489B1 (en) 2022-08-03 2023-04-14 김영만 Triple film manufacturing apparatus and triple film manufacturing method using same and triple film

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2534281B2 (en) * 1987-11-17 1996-09-11 大倉工業株式会社 Multi-layer polyurethane film with excellent chemical resistance
JP2005059559A (en) * 2003-08-11 2005-03-10 Og Corp Foamed sheet and its production method

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2534281B2 (en) * 1987-11-17 1996-09-11 大倉工業株式会社 Multi-layer polyurethane film with excellent chemical resistance
JP2005059559A (en) * 2003-08-11 2005-03-10 Og Corp Foamed sheet and its production method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102522489B1 (en) 2022-08-03 2023-04-14 김영만 Triple film manufacturing apparatus and triple film manufacturing method using same and triple film

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