KR101686606B1 - The structure and manufacturing method of a film with a polypropylene fusion sealing structure - Google Patents

The structure and manufacturing method of a film with a polypropylene fusion sealing structure Download PDF

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Publication number
KR101686606B1
KR101686606B1 KR1020150162077A KR20150162077A KR101686606B1 KR 101686606 B1 KR101686606 B1 KR 101686606B1 KR 1020150162077 A KR1020150162077 A KR 1020150162077A KR 20150162077 A KR20150162077 A KR 20150162077A KR 101686606 B1 KR101686606 B1 KR 101686606B1
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South Korea
Prior art keywords
film
film layer
container
polypropylene
weight
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KR1020150162077A
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Korean (ko)
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윤영욱
윤보원
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윤영욱
윤보원
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/06—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the heating method
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D65/00—Wrappers or flexible covers; Packaging materials of special type or form
    • B65D65/38—Packaging materials of special type or form
    • B65D65/40—Applications of laminates for particular packaging purposes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
    • B65D81/24—Adaptations for preventing deterioration or decay of contents; Applications to the container or packaging material of food preservatives, fungicides, pesticides or animal repellants
    • B65D81/26—Adaptations for preventing deterioration or decay of contents; Applications to the container or packaging material of food preservatives, fungicides, pesticides or animal repellants with provision for draining away, or absorbing, or removing by ventilation, fluids, e.g. exuded by contents; Applications of corrosion inhibitors or desiccators
    • B65D81/264—Adaptations for preventing deterioration or decay of contents; Applications to the container or packaging material of food preservatives, fungicides, pesticides or animal repellants with provision for draining away, or absorbing, or removing by ventilation, fluids, e.g. exuded by contents; Applications of corrosion inhibitors or desiccators for absorbing liquids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2323/00—Polyalkenes
    • B32B2323/10—Polypropylene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2439/00—Containers; Receptacles
    • B32B2439/70—Food packaging

Abstract

The present invention relates to a film structure having a polypropylene fused sealing structure and a method for manufacturing the same, wherein a film maintains a shape thereof by using fine holes formed in a resin to adsorb moisture, adsorbs several molecules to be used as a deodorizer and deodorant, packages food by fusing polypropylene on a container, and is repeatedly attachable or detachable by using adhesiveness of a hot melt. The film structure comprises: a first film layer formed by a film manufacturing apparatus and capable of performing a lid function at an upper portion of a container; a second film layer formed of 100 wt% of polypropylene (PP) to be fused to the container; and a hot melt layer formed between the first film layer and the second layer to allow the first film layer to be repeatedly attachable and detachable with respect to the container. Considering a film which has been attached to a poly-based container and could not be easily detached from the container by addition of adhesiveness, polypropylene (PP) is fused on the upper portion of the container and a film is allowed to have adhesiveness by using a hot melt, so the film is repeatedly used by being attached to or detached from the container.

Description

Technical Field The present invention relates to a film structure having a polypropylene fusion sealing structure and a manufacturing method thereof,

The present invention relates to a film structure having a polypropylene fusion sealing structure and a manufacturing method thereof, and more particularly, to a film structure having a polypropylene fusion sealing structure, and more particularly, A film structure having a polypropylene fusion sealing structure that allows repeated use of the hot melt adhesive to remove the film and easily adhere the polypropylene to the container to easily pack the food in the container, And a manufacturing method thereof.

Generally, on the back side of a polyethylene film that packs food, it grows in contact with bacterial, fungal, and other viruses during manufacturing or distribution.

As described above, when bacterial fungi and other viruses propagate on the polyethylene film, the plants are deteriorated and odors are generated, which is a very unsanitary problem and shortening of the distribution period of the food.

In order to solve the above problems, a silica gel (dehumidifying agent) is used to increase the deterioration and circulation period of contents to be packed.

The silica gel can be divided into a blue silica gel containing a substance called cobalt chloride which is a blue pigment and a transparent silica gel containing DMF in a transparent state. When food is packed, a clear transparent silica gel containing DMF is packed in a pouch and put into a wrapping paper.

However, when it is exposed to transparent transparent silica gel containing DMF, it can cause skin diseases including skin rash, allergies and the like, and also causes side effects such as dyspnea.

In addition, as for the prior art of this field, Korean Patent Laid-Open Publication No. 1999-78895 discloses a method for producing a polyethylene film for food packaging to which an antimicrobial agent is added, comprising the steps of: And the antimicrobial activity against bacteria, fungi, and other viruses is added and mixed, and the mixture is melted and extruded to form a polyethylene film.

The prior art described above has the advantage that the polyethylene film obtained by mixing the polyethylene powder and the masterbatch powder having antimicrobial properties and melting the same and extruding and spinning has antimicrobial properties but can not absorb the moisture inside the container for packing foods and the like, There is a problem that silica gel must be used in order to prevent the food from being corrupted.

When the above polyethylene film is fused to the upper portion of the container by heat to be used for packaging foods and beverages inside the container, if the polyethylene film is peeled off from the container, it can not be attached to the upper portion of the container. And the like.

Patent Document 1: Korean Published Patent Application No. 1999-78895 (published on May 11, 1999)

In order to solve the above problems, the present invention provides a polypropylene fusion sealing structure having a function of hygroscopic (HC) which absorbs moisture inside the container when heat is applied to the container to store and distribute various foods And a method for producing the same.

Also, the present invention relates to a polypropylene fusion sealing sheet (hereinafter referred to as " polypropylene < RTI ID = 0.0 > fusion < / RTI > sealing ") that can adsorb various molecules by adsorbing moisture using a large number of pores formed in hygroscopic resins, And a method for producing the same.

In addition, the present invention relates to a film structure having a polypropylene fused-sealing structure in which a polypropylene is fused to a container to easily pack foodstuffs, and a film can be repeatedly peeled off by using the tackiness of hot- And a manufacturing method thereof.

In order to accomplish the above object, the present invention provides a film structure having a polypropylene fusion sealing structure. And a second film layer formed to have the same shape as the top shape of the container and having a hot melt and formed between the first film layer and the upper portion of the container. The urethane, polyester The first film layer has a function of sticking by the hot-melt layer 130 formed of any one of EVA, EVA, and PA.

The first film layer of the present invention is characterized by being composed of 100% by weight of linear low density polyethylene (LLDPE).

The first film layer of the present invention is characterized in that the resin is mixed with linear low density polyethylene (LLDPE) to increase the functionality of the film or change the physical properties thereof.

The first film layer of the present invention contains 100 wt% of the total weight, including linear low density polyethylene (LLDPE), a moisture absorbent, a dispersant, and a slip agent, and the 100 wt% , The linear low density polyethylene (LLDPE) is 60 wt% to 72 wt%, the moisture absorbent is 23 wt% to 35 wt%, the dispersing agent is 1 wt% to 4 wt% 1% by weight to 4% by weight.

The moisture absorbent of the present invention composed of 23% by weight to 35% by weight of the present invention can be produced by mixing zeolite, polyethylene terephthalate glycols (PETG), Suryln, metallocene-poly ethylene (M- (Polyethylene terephthalate glycols), Suryln, metallocene-poly ethylene (M-PE), and the like, which are mixed with any one of ethylene-co-methyl acrylate (EMA) Ethylene-co-methyl acrylate (EMA) is characterized by being 30% by weight to 35% by weight of the total weight of the hygroscopic agent.

The second film layer formed with the hot melt of the present invention is characterized in that its shape is formed according to the shape around the container inlet.

The present invention provides a method for manufacturing a film, comprising: a tenth step of constructing a first film layer through a film production apparatus using an LLDPE raw material; A twentieth step of forming a second film layer formed on one side of the hot melt through a film production apparatus using a polypropylene (PP) raw material and a hot melt raw material; Forming a second film layer having a shape similar to that of the container inlet through a cutting device; The second film layer is fused to the container by thermal fusion at the inlet of the container while the second film layer cut in the same manner as the shape of the container inlet is positioned below the first film layer, And fusing the first and second substrates.

In the present invention, polypropylene (PP: polypropylene) is applied onto a container which is attached to a poly-type container and tackiness is imparted to the film so that the film can be easily detached, It has the effect of repeating the use of the film in the container.

The present invention can not adhere to the upper part of the container once the conventional polyethylene (PE) film is peeled off, so that problems such as transferring or discarding the food inside the container can be adhered to the container surface, So that the food is prevented from being discarded.

The present invention also relates to a method of adsorbing various molecules and adsorbing various molecules to be used as a deodorant and a deodorant by adsorbing moisture by using pores formed in a resin, absorbing moisture from the resin, It has an effect of removing heavy metals.

Further, the present invention has an effect that the antimicrobial activity acts through the metal ion contained in the resin.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a structural view showing a production apparatus for producing a film structure having a polypropylene fusion sealing structure according to the present invention; FIG.
2 is a view showing a film structure having a sealing structure of a container manufactured by the manufacturing apparatus of FIG.
FIG. 3A is a view showing a state in which a film structure having a polypropylene fusion sealing structure according to the present invention is applied to a container. FIG.
Fig. 3b is a view showing a structure in which a film structure having a polypropylene fusion sealing structure according to the present invention is attached to a container. Fig.
4 is a flow chart showing a method for producing a film having a polypropylene fusion sealing structure according to the present invention.

While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail.

It should be understood, however, that the invention is not intended to be limited to the particular embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

Like reference numerals are used for similar elements in describing each drawing. The terms first, second, etc. may be used to describe various components, but the components are not limited by the terms. The terms are used only for the purpose of distinguishing one component from another.

For example, the term "and / or" includes any combination of a plurality of related listed items or any of a plurality of related listed items.

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the meaning in the context of the relevant art and are to be construed as ideal or overly formal in meaning unless explicitly defined in the present application Should not.

The specific terminology used in the following description is provided to aid understanding of the present invention, and the use of such specific terminology may be changed into other forms without departing from the technical idea of the present invention.

Hereinafter, a film structure having a polypropylene fusion sealing structure according to the present invention and a method of manufacturing the same will be described in detail with reference to the accompanying drawings.

FIG. 1 is a structural view showing a manufacturing apparatus for producing a film structure having a polypropylene fusion sealing structure according to the present invention, and FIG. 2 is a view showing a film structure having a sealing structure of a container manufactured by the manufacturing apparatus of FIG. FIG. 3A is a view showing a state in which a film structure having a polypropylene fusion sealing structure according to the present invention is applied to a container, FIG. 3B is a view showing a state where a film structure having a polypropylene fusion sealing structure according to the present invention is attached FIG.

1 to 3B, a film structure having a polypropylene fusion sealing structure according to the present invention constitutes the film 100 by means of a film production apparatus so as to serve as a lid at the top of the container 1.

The film 100 includes a first film layer 110 formed by a film production apparatus so as to serve as a lid at an upper portion of the container 1 and a second film layer 110 formed by 100 weight parts of polypropylene (PP) % Of the first film layer 110 and the second film layer 120 so that the first film layer 110 is detached from the container 1 and can be repetitively repeated. (EVA) and amide (PA) so as to be laminated on one side of the first film layer 120 and the second film layer 120. The hot-melt layer 130 is formed of one of urethane, polyester, EVA and PA.

The first film layer 110 is formed by mixing linear low density polyethylene (LLDPE) and resin in order to cut the functionality of the film 100 or change the physical properties thereof. The linear low density polyethylene Can be composed of 100% by weight.

The linear low density polyethylene has a smaller molecular structure than that of general LDPE (Low Density Polyethylene) and has a molecular weight distribution similar to that of high density polyethylene (HDPE), and has a relatively high melt viscosity when heated. In addition, since the crystallinity is usually better than that of low-density polyethylene (LDPE), rigidity and scratch resistance are good, tear resistance is high, and surface hardness is relatively large.

In addition, the first film layer 110 is not limited to 100% by weight of the linear low density polyethylene, but may be formed as follows. The first film layer 110 includes linear low density polyethylene (LLDPE), a moisture absorbent, a dispersant, and a slip agent.

Wherein the slurry contains 1 wt% to 4 wt% of a linear low density polyethylene (LLDPE), the moisture absorbent is 23 wt% to 35 wt%, the dispersant is 1 wt% to 4 wt% % To 4% by weight, and the mixture is mixed for 30 minutes using a blending mixer to form a spherical or chip-shaped film raw material through an extruder.

The moisture absorbent is composed of 65 wt% to 70 wt% of zeolite and 30 wt% to 35 wt% of linear low density polyethylene (LLDPE).

The first film layer 110 is not limited to the above-described structure, but may be implemented in different ways. The first film layer 110 includes linear low density polyethylene (LLDPE), a moisture absorbent, a dispersant, and a slip agent.

Wherein the linear low density polyethylene is 60 wt% to 72 wt%, the moisture absorbent is 23 wt% to 35 wt%, the dispersant is 1 wt% to 4 wt%, and the slip agent is 1 wt% to 4 wt% And the mixture is kneaded for 30 minutes, which is then extruded to form a spherical or chip-shaped film raw material.

The moisture absorbent includes Suryln and linear low density polyethylene, and is composed of 65 wt% to 70 wt% of Suryln and 30 wt% to 35 wt% of the linear low density polyethylene.

The first film layer 110 is not limited to the above, but may be implemented differently. The first film layer 110 includes linear low density polyethylene (LLDPE), a moisture absorbent, a dispersant, and a slip agent.

The slurry is 1 wt% to 4 wt%, the dispersant is 1 wt% to 4 wt%, the slip agent is 1 wt% or less, To 4% by weight. The mixture is mixed for 30 minutes using a blending mixer, and the raw material of the spherical or chip-shaped film is formed through an extruder.

Wherein the moisture absorber comprises EMA (ethylene-co-methyl acrylate) and linear low density polyethylene, the EMA is 65 wt% to 70 wt%, the linear low density polyethylene (LLDPE) By weight.

The second film layer 120 is made of polypropylene (PP), and the polypropylene used is a PP-based RM5300 product produced by PolyMirae. The polypropylene is composed of 98% by weight of an ethylene-propylene copolymer and 2% by weight of an additive.

The second film layer 120 is not limited to 100% by weight of the polypropylene but may be modified as follows. The second film layer 120 may include polypropylene (PP), a moisture absorbent, and a resin.

The second film layer 120 is formed so as to be fused to the periphery of the inlet 1 when the container 1 is thermally fused.

The hot melt 130 may be made of any one of urethane, polyester, EVA, and amide, and may be in the form of a liquid, a powder, or a film, Do.

The hot melt layer 130 is formed between the first film layer 110 and the second film layer 120 so that the hot melt layer 130 is laminated on one side of the second film layer 120 during the production of the film.

When the second film layer 120 is thermally fused to the inlet of the container 1, the second film layer 120 is fused to the inlet of the container 1, The hot melt layer 130 is positioned at the inlet of the container 1 so that the first film layer 110 is formed so as to be detached from the inlet of the container 1 and repeated.

The method for producing a film having the polypropylene fused sealing structure of the present invention constructed as above will be described with reference to the accompanying drawings.

4 is a flowchart showing a method for producing a film having a polypropylene fusion sealing structure according to the present invention.

Referring to FIG. 4, in a method for producing a film having a polypropylene fusion sealing structure according to the present invention, a 10th step of constituting a first film layer 110 of 100% by weight of LLDPE through a film production apparatus using an LLDPE raw material A second film layer 120 made of 100% by weight of polypropylene (PP) so that the first film layer 120 can be fused to the inlet of the container 1 through the film manufacturing apparatus by heat fusion; (S20) of forming a hot-melt layer 130 composed of any one of urethane, polyester, EVA and amide (PA) so as to be laminated on one side of the hot- (S30) of forming the second film layer 120 through the cutting device in the same manner as the shape of the inlet of the container 1 and the second film layer 120 cut in the same shape as the inlet shape of the container 1 1 film layer 110 in the vicinity of the inlet of the container 1, 2 and so the film layer 120 is fused, the first film layer 110 includes a first step 40 (S40) to have an adhesive function to ensure sealing by the hot-melt 130.

The process of producing the film through the above steps will be described. A raw material for the packaging film 100 to be blended with the resin pellets is formed before the raw material is introduced into the blown film line, and the formed packaging film 100 A hopper 10 for supplying a raw material of the hopper 10 to a hopper 10 and a molding machine 20 for melting the raw material of the hopper 10. The raw material of the film melted in the molding machine 20 forms bubbles An air ring die 30 for forming the film 100 and nip rollers 40 for guiding the film 100 produced through the air ring die 30, And a winding unit 50 for winding the film 100 supplied through the nip roller 40 in the form of a cylindrical roll.

The raw materials to be added to the hopper 10 were mixed with linear low density polyethylene (LLDPE) using a blending mixer for 30 minutes in order to increase the functionality of the film or to change the physical properties thereof to form a first film layer 110 ) In the form of spheres or chips through an extruder.

Polypropylene (PP), a hygroscopic agent and a resin are mixed to form the second film layer 120, and the mixture is mixed for 30 minutes using a blending mixer, and a chip-shaped raw material is produced through an extruder.

The hot melt layer 130 formed on one surface of the second film layer 120 may be formed of a liquid, a powder, or a hot-melt film composed of any one of urethane, polyester, EVA and amide. Preferably, the hot melt layer 130 is laminated when the second film layer 120 is formed.

The first film layer 110 is manufactured in the following manner, wherein the first film layer 110 and the second film layer 120 are respectively formed.

In order to manufacture the first film layer 110, the molding machine 20 forms a housing for receiving and melting the raw material of the film packed in the hopper 10, and a screw rotated by a motor is disposed inside the housing An output member is provided on one side of the housing so that the molten raw material is supplied to the air ring die 30 at a constant daily rate and at a constant speed, and the housing is provided with heating And constitutes a heater.

The air ring die 30 includes a raw material input member that is supplied with a film raw material supplied from a molding machine, and a blower member that cools and cools the supplied raw material to a predetermined length by air.

The blower member is formed such that air is supplied upwardly from the lower portion of the air ring die 30 and air is supplied upwardly of the air ring die 30 from the side surface. The discharge of the air supplied from the above side adjusts the discharge amount according to the kind of the produced film.

The film moving upward by the blower member is fed to the nip roller 40 while being guided by a guide plate provided at the lower part of the nip roller 40. The cut film is wound on the winding part 50 and wound .

The first film layer 120 and the second film layer 120 formed on one surface of the hot-melt layer 130 in the state where the first film layer 110 and the second film layer 120 are formed, respectively, The second film layer 120 is cut to conform to the shape of the container 1 and then is joined to the first film layer 110. The first film layer 110 is formed on the upper surface of the container 1,

The laminate is such that the second film layer 120 is positioned on the container 1 and the first film layer 110 is positioned on the second film layer 120. When the first film layer 110 and the second film layer 120 are superimposed on each other, a hot-melt layer 130 is positioned between the first film layer 110 and the second film layer 120, The second film layer 120 is thermally fused to the upper portion of the container 1 so as to be fused.

The hot melt layer 130 formed on one side of the second film layer 120 is formed by the heat of the second film layer 120. The second film layer 120 is formed by fusion with the upper part of the container 1 by heat, (120) is fused and the first film layer (110).

As described above, only the hot melt layer 130 and the first film layer 110 are left on the container 1. At this time, if the first film layer 110 is peeled from the container 1 to eat food, A part of the first film layer 130 is broken and the remaining part of the second film layer 120 remains in the fused part and the remaining part of the first film layer 110 is left in the first film layer 110, It has an adhesive function that can be detached and attached.

In the case where the first film layer 110 having the adhesive function is peeled off from the container 1 as described above and the food remains inside after being eaten, the food is conventionally stored in a separate container, (1), or wrapped in a separate wrap or in a container.

However, when the film 100 of the present invention serves as a lid at the top of the container 1, the first film layer 110 may be detached from the container 1 by the hot-melt layer 130, There is an advantage that the first film layer 110 is attached to the container 1 without storing the container or the wrap, and the remaining food is easily stored.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.

1: Container 10: Hopper
20: Molding machine 30: Air ring
40: nip roller 41: guide plate
50: winding section 100: film
110: first film layer 120: second film layer
130: Hot melt

Claims (7)

The film 100 having the sealing structure of the container 1 includes linear low density polyethylene (LLDPE), a moisture absorbent, a dispersing agent, and a slip agent in order to increase the functionality of the film 100 or change the physical properties thereof And the first film layer 110 formed through the film production apparatus so as to serve as a lid at the top of the container 1 has a total weight of 100 wt% Wherein the amount of the dispersant is 1 wt% to 4 wt%, and the slip agent is 1 wt% or less. % ≪ / RTI > to 4% by weight of a polypropylene fused sealing structure,
(PP) made of polypropylene by a film production apparatus so that it can be fused to the upper part of the container 1 by thermal fusion, and the second A film layer 120; The second film layer 120 between the first film layer 110 and the second film layer 120 is laminated so that the first film layer 110 can be detached from the container 1, And a hot melt layer (130) formed of one of EVA (EVA) and a polypropylene fused sealing structure. delete delete delete delete delete A method for producing a film having a polypropylene fusion sealing structure,
The first film layer 110 formed through the film manufacturing apparatus so as to serve as a cover at the upper portion of the container 1 is made of linear low density polyethylene (LLDPE: linear low density polyethylene (LLDPE)) for increasing the functionality of the film 100, Density Polyethylene), a moisture absorbent, a dispersant, and a slip agent, the total weight being 100 wt%
Wherein the first film layer and the second film layer are laminated,
Wherein the slurry contains 1 to 4% by weight of a linear low density polyethylene (LLDPE), the moisture absorbent is 23 to 35% by weight, the dispersant is 1 to 4% by weight, 10 < th > step (S10) of constituting a first film layer (110) composed of% by weight to 4% by weight;
A second film layer 120 made of 100% by weight of polypropylene (PP) so that the film can be fused to the inlet of the container 1 through the film manufacturing apparatus by thermal fusion, and a second film layer 120 made of urethane (S20) of forming a hot-melt layer 130 made of any one of polyester, EVA, and PA;
A 30th step of forming a second film layer 120 formed on one surface of the hot melt layer 130 and composed of 100% by weight of polypropylene (PP) through a cutting device so as to have the same shape as the circumference of the inlet of the container 1 S30);
The second film layer 120 is formed by thermal fusion around the inlet of the container 1 with the second film layer 120 cut in the same shape as the inlet of the container 1 positioned below the first film layer 110 And a step (S40) of causing the first film layer (110) to be fused by the hot melt (130) so as to have an adhesive function so that the first film layer Way.
KR1020150162077A 2015-11-18 2015-11-18 The structure and manufacturing method of a film with a polypropylene fusion sealing structure KR101686606B1 (en)

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CN117417571A (en) * 2023-10-19 2024-01-19 南京亨瑞斯新材料科技有限公司 Method for manufacturing food packaging material for water-absorbing thermoforming

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