KR20110037434A - Method for laminating pla films on the both sides of a paper substrate - Google Patents

Method for laminating pla films on the both sides of a paper substrate Download PDF

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Publication number
KR20110037434A
KR20110037434A KR1020090094876A KR20090094876A KR20110037434A KR 20110037434 A KR20110037434 A KR 20110037434A KR 1020090094876 A KR1020090094876 A KR 1020090094876A KR 20090094876 A KR20090094876 A KR 20090094876A KR 20110037434 A KR20110037434 A KR 20110037434A
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KR
South Korea
Prior art keywords
pla
paper substrate
pla film
sides
paper
Prior art date
Application number
KR1020090094876A
Other languages
Korean (ko)
Inventor
최혁수
Original Assignee
최혁수
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 최혁수 filed Critical 최혁수
Priority to KR1020090094876A priority Critical patent/KR20110037434A/en
Publication of KR20110037434A publication Critical patent/KR20110037434A/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
    • 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
    • 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
    • B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
    • 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
    • B32B29/00—Layered products comprising a layer of paper or cardboard
    • B32B29/002—Layered products comprising a layer of paper or cardboard as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B29/005—Layered products comprising a layer of paper or cardboard as the main or only constituent of a layer, which is next to another layer of the same or of a different material next to another layer of paper or cardboard layer
    • 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
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2067/00—Use of polyesters or derivatives thereof, as moulding material
    • B29K2067/04—Polyesters derived from hydroxycarboxylic acids
    • B29K2067/046—PLA, i.e. polylactic acid or polylactide

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Laminated Bodies (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Abstract

The present invention relates to a double-side laminating method of a paper substrate using a PLA film, and more particularly, (A) the first PLA film, the heated paper substrate and the second PLA film is transferred in the same longitudinal direction; (B) the first PLA film and the second PLA film on the both sides of the paper base material is thermally contact-compressed on the heat-sealed line in the width direction while the PLA films are thermally compressed or part on the contact line of both sides of the paper base material Thermally fused; (C) the paper substrate, the first PLA film and the second PLA film is continuously transferred to pass through the heat-sealing line to continue the step (B) so that the PLA films on both sides of the paper substrate By thermo-compression or partial thermal fusion, PLA film can be laminated by continuous thermal compression or partial thermal fusion on both sides of the paper substrate without any special limiting factor, which enables mass production of PLA laminating paper with excellent work productivity and low manufacturing cost. It works.

Description

Laminating method of paper substrate using PLA film {Method for laminating PLA films on the both sides of a paper substrate}

The present invention relates to a double-side lamination method of a paper substrate using a PLA film, and more particularly to a method of laminating by thermally pressing the PLA film on both sides of the paper substrate.

Unlike synthetic plastics, PLA is characterized by biodegradation in natural environments where certain composting conditions are met. Due to the development of injection, extrusion, or molding technology, such eco-friendly PLA has been released in various products and used in real life.

However, PLA has a disadvantage in that coating on paper, which is one of the most useful materials in real life, has a disadvantage in that the polymer has a low solidification speed and poor physical properties.

The United States Patent No. 6,183,814 and the Republic of Korea Patent Registration No. 10-875104 proposed as a way to improve the disadvantages of PLA disclose a melt coating method and composition of the PLA resin, respectively. The patent 6,183,814 was filed on May 22, 1998 (International Application No. PCT / US1998 / 10385), and subsequently filed on November 23, 1999, Republic of Korea (Korean Patent Application No. 1999-7010885).

The patent 6,183, 814 has a disadvantage in that the PLA is not preferably implemented on a paper substrate because the PLA has a disadvantage in that the elongation of PLA is very hard and thermal stability is low. In addition, while Patent No. 10-875104 discloses a composition, a detailed coating method is not disclosed and the invention cannot be easily carried out at the level of those skilled in the art.

In addition, these patents are difficult to quickly meet the desired production conditions, depending on the characteristics of the paper, coating thickness, equipment, etc., there is a source problem that the production cost is high because mass production is not easy.

Accordingly, the present inventors have applied for a patent application for an apparatus and a method which can solve the above problems (Patent application No. 10-2009-82806, filed date: September 3, 2009) '). The present application technology of the present invention is a technology for thermally bonding the PLA film to one surface of the paper substrate, it has the feature to solve all the problems of the prior art described above.

However, the present application of the present invention has a feature that can solve the problems of the prior art described above, there was a disadvantage that both sides of the paper substrate is not heat fusion and mass production is not easy.

An object of the present invention created to solve the above problems is to provide a double-side laminating method of the substrate using a PLA film that can be continuously fused PLA film on both sides of the paper substrate.

It is an object of the present invention to provide a method for manufacturing a plastic film comprising: (A) transferring a first PLA film, a heated paper substrate and a second PLA film in the same longitudinal direction; (B) the first PLA film and the second PLA film on the both sides of the paper base material is thermally contact-compressed on the heat-sealed line in the width direction while the PLA films are thermally compressed or part on the contact line of both sides of the paper base material Thermally fused; (C) the paper substrate, the first PLA film and the second PLA film is continuously transferred to pass through the heat-sealing line to continue the step (B) so that the PLA films on both sides of the paper substrate It can be achieved by a double-side laminating method of paper substrates using a PLA film that is thermocompressed or partially thermofused.

The present invention having the above configuration can be laminated by thermal compression or partial thermal fusion of the PLA film continuously on both sides of the paper substrate without any particular limitations, and thus it is effective to mass produce PLA laminating paper with excellent work productivity and low manufacturing cost. There is.

Hereinafter, the configuration of the present invention with reference to the drawings in detail.

First, the driving means of the laminator according to the present invention is not shown, but the heating roller 13, the pressing roller 31, 33, the cooling roller 40 and the conveying roller 50 are connected by the single motor to convey the same It is preferable to have a speed and a rotational speed, but the present invention is not limited thereto, and the driving means will not be described later.

1 is a front view schematically showing a PLA film double-side laminator according to the present invention, Figure 2 is an enlarged front view showing a laminating roller portion of FIG.

1 and 2, the laminator according to the present invention is a device for laminating the PLA film (F1) (F2) by thermal compression or partial thermal fusion on both sides of the paper substrate (P), respectively.

The laminator includes a heater 10, a heat insulating member 20, a pair of crimping rollers 31 and 33 that engage and rotate together, a pressure roller 40, a plurality of transfer rollers 50 and a temperature sensor 60. do.

The heater 10 is comprised by the casing 11 and the some heating roller 13 integrated in the casing 11.

Here, the casing 11 has a space formed therein so as to accommodate the plurality of heating rollers 13, and the inlet 11a and the outlet 11b are formed. Moreover, the casing 11 has a heat insulation structure so that the heat of the heated heating roller 13 may not heat-transfer to the outside.

The heating roller 13 is integrated in the casing 11 with rollers which mesh and rotate together.

The heater 10 according to the present invention has been described as being limited to the heat transfer in direct contact with the outer circumferential surface of the heating roller 13 in which both sides of the paper substrate P are engaged and rotate together, but the heat roller 13 is not limited thereto. Even if it is used in a non-contact heating method without configuring a there is no effect on the implementation of the object of the present invention.

The heater 10 according to the present invention is used for the purpose of heating the paper base material P to a constant temperature.

The pair of pressing rollers 31 and 33 press the PLA films F1 and F2 on both sides of the paper substrate P heated at a constant temperature.

Here, it is preferable that the heater 10 and the crimping rollers 31 and 33 constitute a short working copper wire as possible. This is because the paper base material P having a constant temperature drawn out from the outlet 11b of the heater 10 drops as the temperature is transferred.

However, when the heater 10 and the compression rollers 31 and 33 having a thermal insulation structure are brought closer than necessary, the heat sensitive PLA film F1 (F2) may be thermally deformed. In order to prevent this, the present invention provided a heat insulating member 20 between the heater 10 and the pressing roller 31, 33. As described above, the heat insulating member 20 must be insulated so that the PLA films F1 and F2 are not thermally deformed, and at the same time, do not interfere with the transfer of the paper substrate P.

PLA film (F1) (F2) is wound in the form of a roll, after the laminator of the present invention is operated by a plurality of conveying rollers 50 are in close contact with the outer circumferential surface of each of the pressing roller (31) (33) It is crimped | bonded to both surfaces of the paper base material P, respectively.

Since the compression rollers 31 and 33 are in constant contact with the heated paper substrate P, their own temperature may be increased, which may cause thermal deformation or thermal displacement of the PLA films F1 and F2. For this reason, the cooling rollers 31a and 33a which abut each other and revolve so as to maintain normal temperature, for example, 25-35 degreeC, are provided.

The pressure roller 40 is installed at the rear of the pressing rollers 31 and 33 to improve the quality of laminating by pressing the PLA laminating paper PF, in which the PLA films F1 and F2 are laminated on both sides once more. Perform the function.

The temperature sensor 60 is installed in front of the pressing rollers 31 and 33 to sense the temperature when the heated paper substrate P is actually supplied to the pressing rollers 31 and 33 to heat the heater 10. To increase or decrease the temperature. For example, the temperature sensor 60 is provided to heat the paper substrate P to a constant temperature regardless of the thickness or basis weight of the paper substrate P when the PLA films F1 and F2 have the same thickness.

When the PLA film (F1) (F2) is thermally compressed on both sides of the paper substrate (P) as follows. Here, the first surface of the PLA film (F1) (F2) is a surface which is in contact with the outer peripheral surface of the corresponding pressing roller 31, 33, respectively, and the second surface is the surface opposite to the first surface.

Each first surface of the PLA film F1 (F2) is in close contact with the point B or the point A 'to the point B' from the point A in contact with the outer circumferential surfaces of the pressing rollers 31 and 33. At this time, from the point A to the point B or from the point A 'to the point B' PLA film (F1) (F2) is constrained to the outer circumferential surface of the pressing roller 31, 33 does not cause any displacement in any direction.

And both surfaces of the paper base material P are in contact with each second surface of the PLA film F1 (F2) on the line B-B 'of the respective pressing rollers 31 and 33.

Line B-B 'is positioned on the same vertical line, on which both sides of the paper substrate P and the second side of each PLA film F1 (F2) are pressed and pressed. At this time, the heat of the heated paper substrate (P) is heat transfer by direct contact with the PLA film (F2) and accordingly the PLA film (F1) (F2) is instantaneously partly or completely melted on both sides of the paper substrate (P) Thermocompression or partial thermofusion.

Therefore, PLA film F1 (F2) is thermo-compression-bonded or partial thermofusion on both surfaces of paper base material P continuously according to the interlocking of the crimping rollers 31 and 33 which contact and rotate together. As a result, according to the laminator according to the present invention, all the disadvantages of the conventional PLA melt coating method and the disadvantages of the present application technology of the present invention are temporarily suspended by thermo-compression or partial thermal fusion of the PLA film having a constant thickness on both sides of the paper substrate. There are features that can be solved.

The working conditions for thermocompression bonding or partial thermofusion of PLA film on a general disposable cup paper are as follows.

① Paper Base-Common Cup Paper

② PLA film thickness-5 to 30 ㎛

③ Adhesive-Edible Adhesive

The adhesive of the present invention may be used according to the purpose of the PLA cup paper, and may not use the adhesive as in the embodiment of the present invention mentioned above.

④ The temperature of the paper base material immediately before being supplied to the pressing roller-70 to 120 ° C

⑤ working speed-10 to 50 m / min

3 is a schematic explanatory view for explaining a double-side laminating method using a PLA film according to the present invention, Figure 4 is an enlarged cross-sectional view showing a portion "A" of FIG.

The laminating method according to the present invention will be described with reference to FIGS. 3 and 4.

① Preparation of paper base material (P) and PLA film (F1) (F2)

The laminating method of the present invention recommends the use of a PLA film having a thickness of about 5 to 50 μm for paper substrates such as disposable cup papers, fast hood packaging papers such as hamburgers, shopping bag papers, and the like. In particular, in the case of disposable cup paper, the invention of the present invention recommends the use of a PLA film having a thickness of 5 to 30 μm.

In addition, the method of the present invention recommends the use of 180g / m2, 190g / m2, 200g / m2, 220g / m2 and 240g / m2 for disposable cup paper, and 100g / m2, 110g / m2, 120g for paper bags. / M 2, 140g / m 2 and 160g / m 2 are recommended.

Paper base material (P) and PLA film (F1) (F2) is preferably provided in a rolled form. However, the present invention is not limited thereto, and a sheet cut to a predetermined size may be used.

Then, the paper substrate P and the PLA films F1 and F2 are conveyed at the same speed and in the same direction. Here, the paper substrate (P) and PLA film (F1) (F2) may be transferred in different directions, but must be transferred in the same direction just before the final thermocompression bonding. In addition, the first PLA film F1 and the second PLA film F2 should be positioned up and down based on the paper substrate P, respectively.

Paper substrate (P) and PLA film (F1) (F2) according to the present invention is preferably transferred at a speed of 10 to 50m / min.

In addition, the paper base material P should maintain the temperature just before final thermocompression bonding at least 70-120 degreeC.

② PLA film on both sides of the paper base material (P) (F1) (F2 ) thermal compression bonding or thermal welding part

PLA film (F1) (F2) to be transferred is instantaneous thermocompression bonding on both sides of the paper substrate (P) in the heat-sealing line (Ti). This heat fusion is made in the heat fusion line (Ti) while the PLA film (F1) (F2) and the paper substrate (2) is transferred in the longitudinal direction (L).

Here, the heat fusion line (Ti) is the paper substrate (P) and the PLA film (F1) (F2) is first in line contact with the paper substrate (P) and PLA film (F1) (F2) in a straight line in a straight line It is a fixed virtual line. For example, this heat fusion line Ti may correspond to the line B-B 'formed by the crimping rollers 31 and 33 of FIG. That is, while the paper base material P and the PLA film F1 (F2) pass through the heat fusion line Ti, the PLA film F1 (F2) is thermocompressed or partially heat-sealed on both sides of the paper base material P. Will be.

In addition, the heat of the paper substrate P heated at the heat fusion line Ti is heat-transferred to the compressed PLA films F1 and F2, and as a result of this heat transfer, the PLA films F1 and F2 are partially melted. It is thermocompressed or partially fused to both surfaces of the paper base material P.

In this thermal fusion process, the most careful is to restrain the deformation or displacement in any direction when the PLA film (F1) (F2) is partially melted by pressing the paper substrate (P) in the heat fusion line (Ti) Should be. That is, PLA film (F1) (F2) should be restrained at least immediately before the heat-sealing line (Ti). Because the PLA film (F1) (F2) is the heat deformation or heat displacement is made even before and after 50 ℃ is necessarily required to restrain the PLA film (F1) (F2) to implement the preferred laminating.

PLA film (F1) (F2) to be applied in the present embodiment is preferably coated with an edible adhesive on each side of the paper substrate (P) in contact with both sides, but not limited to this, without using an edible adhesive or thermocompression Partial fusion can also be implemented.

PLA film (F1) (F2) is thermally compressed or partially heat-sealed on both sides of the paper substrate (P) in the fixed heat-sealing line (Ti) as described above, and the paper substrate (P) and PLA film (F1) (F2) continuously PLA film F1 (F2) is thermocompression-bonded or partial thermofusion on both sides of the paper base material P while passing through the heat-sealing line Ti. Therefore, as a result, the PLA film (F1) (F2) on the both sides of the paper substrate (P) as a whole is thermally compressed or partially heat-sealed to produce a PLA laminating paper (PF) as a final product.

The present invention described above is limited to the above-described embodiment (s), but not limited to this embodiment of the present invention is a modification that can be easily implemented by those skilled in the art to which the present invention belongs. It is obvious that it belongs to the technical idea. It is also noted that the present invention can be applied to PLA nonwoven substrates in addition to paper substrates.

1 is a front view schematically showing a PLA film double-sided laminator according to the present invention.

FIG. 2 is an enlarged front view illustrating the laminating roller unit of FIG. 1. FIG.

Figure 3 is a schematic explanatory diagram for explaining the double-sided laminating method using a PLA film according to the present invention.

4 is an enlarged cross-sectional view illustrating a portion “A” of FIG. 3.

<< Explanation of symbols for main part of drawing >>

10: heater

11: casing 13: heating roller

20: heat insulation member

31, 33: compression roller 31a, 33a: cooling roller

40: pressure roller

50: feed roller

60: temperature sensor

Claims (6)

(A) transferring the first PLA film, the heated paper substrate and the second PLA film in the same longitudinal direction; (B) the first PLA film and the second PLA film on the both sides of the paper base material is thermally contact-compressed on the heat-sealed line in the width direction while the PLA films are thermally compressed or part on the contact line of both sides of the paper base material Thermally fused; (C) the paper substrate, the first PLA film and the second PLA film is continuously transferred to pass through the heat-sealing line to continue the step (B) so that the PLA films on both sides of the paper substrate Double sided laminating method of paper substrate using PLA film that is thermocompressed or partially heat-sealed. The method of claim 1, The method of laminating the paper substrate using a PLA film, characterized in that the temperature of the paper substrate immediately before step (B) is 70 to 120 ℃. The method of claim 1, The first PLA film, the paper substrate and the second PLA film is laminated on both sides of the paper substrate using a PLA film, characterized in that conveyed at the same 10 to 50 m / min speed. The method of claim 1, The heat-sealing line is a lamination method of the paper substrate using a PLA film, characterized in that the fixed virtual line in the width direction in which the paper substrate and the PLA film is first in line contact. The method of claim 1, An edible adhesive is applied to one surface of the PLA films, and one surface of the PLA films to which the edible adhesive is applied is thermo-compressed or partially thermally fused to both sides of the paper substrate, respectively. Double side laminating method. The method of claim 1, The PLA films are laminating method of the paper substrate using a PLA film, characterized in that at least immediately before the step (B) to be constrained so that no deformation or displacement occurs in any direction.
KR1020090094876A 2009-10-07 2009-10-07 Method for laminating pla films on the both sides of a paper substrate KR20110037434A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020090094876A KR20110037434A (en) 2009-10-07 2009-10-07 Method for laminating pla films on the both sides of a paper substrate

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020090094876A KR20110037434A (en) 2009-10-07 2009-10-07 Method for laminating pla films on the both sides of a paper substrate

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101110423B1 (en) * 2011-10-20 2012-02-16 주식회사 성은바이오 Method of and apparatus for manufacturing paper coated with pla

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101110423B1 (en) * 2011-10-20 2012-02-16 주식회사 성은바이오 Method of and apparatus for manufacturing paper coated with pla

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