JP2627605B2 - Vinylidene fluoride resin laminated film with process paper and process for producing the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vinylidene fluoride resin laminated film with process paper. More specifically, an overlay film containing a vinylidene fluoride resin is laminated on an internally illuminated signboard or a display panel or a display panel (panel), a sheet, a tape, a wall, or the like of an internally illuminated signboard or an exhibition device that requires weather resistance and stain resistance. The present invention relates to a vinylidene fluoride-based resin laminated film with process paper, which has improved workability at the time.

[0002]

2. Description of the Related Art As a method for imparting weather resistance, stain resistance, and chemical resistance to panels, sheets, tapes, walls, and the like, an overlay film as a thin, transparent, weather-resistant protective film is attached to the front surface thereof. (Laminating) method is simple and general.

There are two types of operations for laminating the overlay film on the substrate to be protected, a continuous roll type and a batch type lamination process. Both types are properly used depending on the type of the protective substrate, the surface state of the protective substrate, for example, the one printed on the protective substrate, the shape of the protective substrate, and the like. The latter is adopted when laminating on printed substrates such as internally illuminated signboards, etc., and is usually a thermal transfer method (applicator)
Is used. The procedure is generally such that the overlay film is placed on a substrate to be protected such as a sheet, a panel, etc., the pressure in the thermal transfer machine is reduced, the air between the substrate to be protected and the overlay film is released, heated, and fused to the surface of the substrate to be protected. It is a method.

As the overlay film, a fluorine resin, particularly a vinylidene fluoride resin or a vinyl fluoride resin, is frequently used. However, the overlay film has various problems to be improved in terms of laminating workability. For example, it is desired that the overlay film is thin, so that wrinkles and sagging (tarumi) are likely to occur during lamination, deformation is likely to occur due to shrinkage of the film due to heat fusion, and various shapes and sizes of the protection target are to be protected. It is necessary to laminate at the correct position with high efficiency.

[0005] By the way, a vinyl fluoride resin film with process paper which solves the above-mentioned problem is known. The film configuration is such that a polyethylene layer is impregnated with a polyethylene layer on the surface of the paper base layer in a small amount so that the cellulose fiber pattern of the paper base layer remains, and a polyvinyl fluoride resin film is laminated thereon. As a result, the two can be adhered (temporarily attached) with an appropriate strength such that the process paper can be easily peeled from the vinyl fluoride resin film after lamination, and the rigidity of the overlay film is increased before lamination. It is. However, when a process paper having such a cellulose fiber pattern is used for an overlay film, the pattern is transferred to the overlay film, which may be undesirable.

[0006] In addition to the above-mentioned vinyl fluoride resin film with process paper, the following various kinds of similar laminated films have been proposed. JP-A-58-220735 discloses a release film for manufacturing a laminated decorative board, which comprises a paper base layer having high smoothness and a release synthetic resin layer having a matte calendered surface. And a release film for producing a decorative laminate comprising a colored ink layer applied to the surface of the resin layer and a low-pressure melamine layer coated on the surface of the ink layer. It is said that the purpose of the release film is to provide a release film for producing a decorative laminate having improved matte gloss, transparency and design on the surface. In particular, the improvement of low-pressure melamine matte veneer, which tends to be inferior in transparency and design, even when using patterns such as wood grain among thermocompression-bonded veneers that tend not to fit into the production line in terms of economy and workability. It is intended. However, the above publication provides a laminated film that can be used for the difficult purpose of attaching an overlay film having high transparency and weather resistance to various sizes and shapes to be protected, which is a problem to be solved by the present invention. It is not intended to do anything.

Japanese Unexamined Patent Publication (Kokai) No. 60-258280 discloses a release paper in which a radiation-curable silicone resin layer is laminated on the surface of a double-sided processed paper. Coatings having a transmittance and a specific moisture content in paper are laminated, and the effect is said to be that dimensional stability during moisture absorption is improved. The cause of this effect was that the material of the silicone resin layer was changed to a radiation-curable type, and as a result, the generation of pinholes due to the curing of the cured resin layer was extremely low. Have been described. However, this document does not suggest any problem to be solved by the present invention.

Japanese Patent Application Laid-Open No. 1-319579 discloses a laminate comprising a heat-resistant insulating film and release paper under the name of “cover lay film”. A production method is disclosed for a relation defined by a mathematical formula. This insulating film has a B-stage heat-resistant adhesive. The effect is said to be to completely prevent the occurrence of curl. However, this document does not mention the problem to be solved by the present invention, nor does it disclose or suggest any solution.

Japanese Patent Application Laid-Open No. 4-1043 discloses a method for producing release paper. In order to manufacture the release paper, an ethylene-based resin layer is extruded at a resin temperature of 200 to 300 ° C. to form a molten thin film. It is disclosed that a material coated with a release agent is cured by heating. The problem to be solved is to suppress the occurrence of pinholes in the ethylene-based resin layer. For that purpose, it is shown by comparison between Examples and Comparative Examples that the upper limit of the extrusion temperature of the resin is important. Have been. However, there is no mention of the problem to be solved of the present invention, and there is no suggestion of the solution.

[0010]

The above-mentioned problems relating to the overlay film have been solved by temporarily adhering process paper as seen in the prior art. However, since vinylidene fluoride resin having excellent weather resistance and stain resistance is non-adhesive or non-adhesive, it is not easy to temporarily adhere process paper without using an adhesive. Although it is considered that the vinyl fluoride resin film with the process paper also improves the temporary adhesion, a new problem arises in that the surface pattern of the process paper is transferred to the overlay film as described above. Therefore, when using a vinylidene fluoride resin film excellent in weather resistance, stain resistance and chemical resistance as an overlay film, the surface pattern of the process paper is not transferred to the overlay film, and the surface pattern of the overlay film is protected, Moreover, an overlay film with a process paper in which the process paper and the vinylidene fluoride resin film are temporarily attached is desired.

[0011]

The present inventors have conducted various studies to solve the above-mentioned problems at the time of laminating an overlay film and various problems of a conventionally known overlay film with process paper. The inventors have found that a vinylidene fluoride-based resin laminated film with process paper having a specific configuration manufactured under specific conditions can solve the above problems, and completed the present invention.

That is, the present invention relates to a process paper (X) comprising a paper base layer (A) and an ethylene-based resin layer (B), the ethylene-based resin layer (B) being provided on the ethylene-based resin layer (B) side. And a vinylidene fluoride-based resin layer (C) -containing film (Y) laminated so that the vinylidene fluoride-based resin layer (C) is in contact with the vinylidene fluoride-based resin layer (C). (TB), the average roughness (RC) of the surface of the vinylidene fluoride resin layer (C) in contact with the ethylene resin layer (B), and the paper base layer (A) in contact with the ethylene resin layer (B). RC + RA + 5 between the average surface roughness (RA)
The present invention relates to a vinylidene fluoride-based resin laminated film with process paper, wherein a relationship of ≦ TB ≦ RC + RA + 100 (all units are μm) is satisfied.

[0013] In the vinylidene fluoride resin laminated film with process paper of the present invention, the adhesive strength (S ₁ ) of the ethylene resin layer (B) and the vinylidene fluoride resin layer (C) is 0.1 to 0.1. 3 g / mm, paper base layer (A)
Strength (S ₂ ) between the resin and the ethylene resin layer (B) is (S ₁ )
Of the ethylene resin (B) and a melt index ΔMI (190 ° C.,
2.16 kg, JIS6760) 1 to 20 g / 10
Minutes.

Further, the present invention relates to a method in which a paper base and a film (Y) containing a vinylidene fluoride resin layer (C) are sheared at a shear rate of 1%.
The present invention relates to a process for producing a vinylidene fluoride resin laminated film with process paper, characterized in that the film is adhered with a molten ethylene resin whose resin temperature is adjusted so that the viscosity at 20 sec ^{-1 is} in the range of 500 to 2500 poise.

The vinylidene fluoride resin laminated film with process paper provided by the present invention is a film containing a vinylidene fluoride resin layer containing a vinylidene fluoride resin layer without the process paper peeling during storage, transportation and lamination as an overlay film. (Y) is given rigidity, that is, shape retention,
When laminating on the object to be protected, the heat shrinkage of the overlay film is prevented, and after lamination, if necessary, the process paper can be uniformly and easily peeled off from the vinylidene fluoride resin layer-containing film (Y). Bonded with interlayer bonding strength (temporary attachment). In addition, in the vinylidene fluoride resin laminated film-like material with process paper of the present invention,
"Film-like object" refers to a concept encompassing a shape ranging from a film to a sheet.

The paper substrate used in the paper substrate layer (A) of the process paper of the present invention is a normal paper made from wood pulp, and its basis weight is 50 to 85 g / m ² , preferably 6
It is in the range of 0 to 70 g / m ² .

As the layer (B) constituting the process paper (X), an ethylene resin is used. The reason for this is that the vinylidene fluoride resin layer (C)
Not only does not affect the state or properties of the surface of the vinylidene fluoride resin layer (C) at that time, and exhibits an appropriate interlayer adhesive strength that can be temporarily bonded. Is not allowed to remain.
Preferable examples of such an ethylene-based resin include a melt index ΔMI (190 ° C., 2.16 kg, JIS6
760) is preferably in the range of 1 to 20 g / 10 min, more preferably 1 to 12 g / 10 min. This melt index range is used to realize a proper interlayer adhesion between the process paper base material layer (A) and the vinylidene fluoride-based resin layer (C), and after laminating by thermocompression bonding and peeling the process paper. This is selected so as not to leave the influence of the surface pattern of the process paper on the surface of the film (Y) containing the vinylidene fluoride resin layer (C).

Specific examples of the ethylene resin include very low density polyethylene (VLDPE), low density polyethylene (LDPE), and linear low density polyethylene (L-LDP).
E), medium-density polyethylene (MDPE), high-density polyethylene (HDPE), as well as ethylene and one or more vinyl monomers such as acrylic acid, methacrylic acid, acrylate, methacrylate, and vinyl acetate. Copolymers, those in which one or more of these vinyl monomers are grafted on a polyethylene main chain, alkali metal salts or alkaline earth metal salts of a copolymer of ethylene and methacrylic acid, which are usually called ionomers And mixtures (compositions) of two or more of the above polymers. Among them, very low density polyethylene (VLDPE) and low density polyethylene (LDP)
E), linear low density polyethylene (L-LDPE) and medium density polyethylene (MDPE) are preferred.

The vinylidene fluoride resin constituting the film (Y) containing the vinylidene fluoride resin layer (C) is not limited to a homopolymer of vinylidene fluoride, but the vinylidene fluoride unit may be 70 mol. % Or more, and may be a homopolymer or a mixture of two or more of the above copolymers. Monomers copolymerized with vinylidene fluoride include tetrafluoroethylene (tetrafluoroethylene), trifluoroethylene (ethylene trifluoride), trifluorochloroethylene (ethylene trifluoride chloride) and hexafluoropropylene (hexafluoropropylene). Propylene) and fluoroolefin monomers such as vinyl fluoride, and acrylates such as methyl acrylate and ethyl acrylate, and methacrylates such as methyl methacrylate and ethyl methacrylate.

Of course, as long as the effects of the present invention are not impaired, a composition in which a homopolymer or a copolymer composed of the above-mentioned monomers is mixed with another kind of resin compatible with them may be used. As the resin having compatibility, acrylate resin, methacrylate resin,
Examples thereof include cyanoethylated ethylene vinyl alcohol copolymer. Among them, preferred is methyl methacrylate resin.

The above-mentioned ethylene-based resin and vinylidene fluoride-based resin may optionally contain an oxidation stabilizer, a heat stabilizer,
One or more stabilizers such as an ultraviolet absorber and a weather stabilizer;
One or more processing aids such as lubricants, release agents and plasticizers can be added.

The laminated film of vinylidene fluoride resin with process paper of the present invention comprises the ethylene resin layer (B) and the vinylidene fluoride resin on the side of the ethylene resin layer (B) of the process paper (X). The vinylidene fluoride resin layer (C) -containing film (Y) is laminated so that the layer (C) is in contact with the layer (C). The vinylidene fluoride-based resin layer (C) -containing film (Y) may be a vinylidene fluoride-based resin single-layer film, or two layers such that the vinylidene fluoride-based resin layer is the outermost layer when used as an overlay film. And a multilayer film such as a three-layer film. Examples of the multilayer film include a two-layer film of a vinylidene fluoride resin layer and a methacrylate ester resin layer, a vinylidene fluoride resin layer, a methacrylate ester resin layer, and another thermoplastic resin layer, such as a vinyl chloride resin. Examples include a three-layer film in which layers are laminated in this order. When such a two-layer film is used as the vinylidene fluoride-based resin layer (C) -containing film (Y), for example, the methacrylic acid ester-based resin layer comes into contact with an object to be protected, and a three-layer film is similarly used. At this time, for example, the vinyl chloride resin layer comes into contact with the object to be protected.

The thickness of the vinylidene fluoride-based resin layer (C) -containing film (Y) constituting the vinylidene fluoride-based resin laminated film with process paper of the present invention is not particularly limited. In order to utilize the feature of the present invention, which is particularly effective when the film has low rigidity, the thickness of the film (Y) is 2 to 100 μm, particularly 4 to 100 μm.
Those at 50 μm are preferred.

The thickness of the ethylene resin layer (B) is (TB)
More specifically, in addition to the thickness that does not allow the unevenness pattern on the paper base layer surface of the process paper to be transferred to the vinylidene fluoride resin layer (C) -containing film (Y), the vinylidene fluoride resin layer (C) -containing film It is necessary to have a thickness that does not impair the shape or pattern provided on the surface of (Y). Therefore, the range of the thickness TB of the ethylene-based resin layer (B) is determined by the formula RC +
RA + 5≤TB≤RC + RA + 100 (unit is μ for all terms)
It is required that the relationship of m) is established. Here, RC is the average roughness of the surface of the vinylidene fluoride resin layer (C) in contact with the ethylene resin layer (B), and RA
Represents the average roughness of the surface of the paper base material layer (A) in contact with the ethylene-based resin layer (B). "Average surface roughness" refers to the center line average roughness Ra. The depth (thickness) of the ethylene resin impregnated in the paper base material layer (A) is determined by the above TB
Not included. When the thickness TB of the ethylene-based resin layer (B) is smaller than the left term “RC + RA + 5” (μm) in the above equation,
The irregularities on the surface of the paper substrate layer (A) are easily transferred to the surface of the film (Y) containing the vinylidene fluoride resin layer (C). On the other hand,
When the thickness of the ethylene-based resin layer (B) is the right term of the above formula, "RC + RA
If it exceeds +100 ”(μm), both the technical significance and the economic significance are lost. In other words, since the function of imparting rigidity to the laminate, which is the role of the process paper, has already been achieved by the paper base layer (A), it is not necessary to reinforce it by increasing the thickness of the ethylene-based resin layer (B). Not at all.

When laminating a vinylidene fluoride-based resin layer (C) -containing film (Y) as an overlay film on an object to be protected using the vinylidene fluoride-based resin-laminated film-like product with the process paper of the present invention, Process paper (X)
And vinylidene fluoride resin layer (C) containing film (Y)
However, it is important that the process paper (X) can be easily peeled from the film (Y) containing the vinylidene fluoride-based resin layer (C) after lamination, showing good workability without peeling. The above requirement can be satisfied by setting the adhesive strength (S ₁ ) between the ethylene-based resin layer (B) and the vinylidene fluoride-based resin layer (C) in the range of 0.5 to 3 g / mm. As another condition for allowing only the process paper to be peeled off from the vinylidene fluoride-based resin layer (C) -containing film (Y) after the vinylidene fluoride resin laminated film with the process paper is adhered to the object to be protected. The adhesive strength (S ₂ ) between the paper base layer (A) and the ethylene-based resin layer (B) forming the process paper (X) is at least 1.5 times the above adhesive strength S ₁ , preferably This is to set it to twice or more. This makes it possible to easily peel the entire process paper from the vinylidene fluoride resin layer (C) -containing film (Y) laminated on the object to be protected.

The above-mentioned interlayer adhesive strength (S ₂ ) is achieved by a method of impregnating the paper base material layer (A) with a molten ethylene resin by the following production method, but a method of interposing an appropriate adhesive or the like is also possible. Can be adopted. In the method of impregnating the paper base material layer with the molten ethylene-based resin, the impregnation depth is usually about 3 to 30 μm from the surface of the paper base material layer (A), so that the interlayer adhesion strength (S ₂ ) is sufficient. Reach the level of the period. When an adhesive is used as a means for realizing the above-mentioned interlayer adhesive strength (S ₂ ), for example, a pressure-sensitive adhesive such as a silicone resin adhesive, a butyl rubber-based adhesive or a styrene-butadiene block copolymer, for example, a low molecular weight adhesive Hot melt adhesives such as polyethylene or ethylene copolymer resin can be used.

An example of the layer structure of the vinylidene fluoride resin laminated film with process paper of the present invention will be described with reference to FIG. In FIG. 1, reference numeral 1 denotes a paper base layer, on one side of which (an upper surface in the figure) an ethylene-based resin layer 2 is laminated in a state in which the paper base layer 1 is impregnated to some extent in the paper base layer 1 to form a process paper 3. ing. Paper base layer 1 via impregnated part 4
The vinylidene fluoride-based resin layer-containing film 5 is laminated on the upper side of the ethylene-based resin layer 2 adhered to the above, to form a vinylidene fluoride-based resin laminated film with process paper of the present invention. If the depth of the impregnated portion has reached about 3 to 20 μm from the surface of the paper base material layer 1 according to the production method described later, the adhesive strength (S ₂ ) between the ethylene-based resin layer 2 and the paper base material layer 1 as described above. Is 1.5 times or more the adhesive strength (S ₁ ) between the ethylene-based resin 2 and the vinylidene fluoride-based resin layer-containing film 5, which is sufficient for improving workability as process paper.

FIG. 2 shows an outline of a process for producing a laminated film of vinylidene fluoride resin with process paper according to the present invention. FIG. 2 shows a case where three layers are simultaneously laminated, and the process paper (X) is not formed independently. FIG.
, The process paper (X) paper substrate 22 is fed in the direction of the arrow from the left side of the figure. The lower surface of the process paper base material 22 is supported by the support rolls 12 and flows along the pressure roller 14 made of silicon rubber located on the right side thereof between the polishing roll 16 and the right side of the pressure roller 14.
The upper surface of the process paper base material 22 may be subjected to corona discharge treatment between the roll 12 and the pressure roll 14. FIG.
, A vinylidene fluoride-based resin layer (C) -containing film (Y) 24 is similarly supplied between the pressure roll 14 and the polishing roll 16. Paper substrate 22 and film 2
Before the roll 4 is rolled into the pressing roll 14 and the polishing roll 16 and pressed, a molten ethylene-based resin 26 is supplied from a T-die 20 provided between the two rolls. The three-layer laminate formed between the pressure roll 14 and the polishing roll 16 moves rightward along the polishing roll 16, turns along a turning roll 18 located on the upper right side of the polishing roll 16, and turns rightward. The vinylidene fluoride resin laminated film 28 with process paper of the present invention is drawn out and manufactured. When the film (Y) containing the vinylidene fluoride-based resin layer (C) is a laminate of the vinylidene fluoride-based resin layer (C) and the methacrylic acid-based resin layer as described above, the vinylidene fluoride-based resin layer (C) is used. The resin layer surface is supplied toward the T-die.

In the case where the vinylidene fluoride resin laminated film with paper sheet of the present invention is produced as described above, the paper base layer (A) and the vinylidene fluoride resin layer (C) -containing film (Y) are used. The resin temperature of the ethylene-based resin supplied during the above is adjusted to a viscosity at a shear rate of 120 sec ^-1 of 500.
It is preferable to adjust so as to be in a range of ２2,500 poise. When the viscosity is 500 poise or more, the thickness of the ethylene resin layer (B) becomes uniform, and the surface state of the obtained vinylidene fluoride resin laminated film with process paper becomes good. When the viscosity is 2500 poises or less, the paper base layer (A) is easily impregnated with the ethylene resin, and the preferable relationship between the adhesive strength (S ₁ ) and (S ₂ ) is easily achieved. The extrusion amount of the ethylene-based resin may be adjusted so as to satisfy the above-mentioned thickness range of the ethylene-based resin layer in the vinylidene fluoride-based resin laminated film with process paper. Crimping roll 14 and polishing roll 1
6 has a surface temperature of 5 to 150 ° C, preferably 15 to 80 ° C.
Set to.

[0030]

EXAMPLES The present invention will be specifically described below with reference to examples, but the scope of the present invention is not limited thereto.

(Example 1) As a paper base material, a basis weight of 65 g / m
² (Temperature 20 ° C., relative humidity 65%, thickness 93 μm, average roughness of the surface to be bonded to polyethylene resin is 1.
89 μm), and as a vinylidene fluoride resin layer-containing film (Y) to be an overlay film, a vinylidene fluoride resin film (“KFC film” (registered trademark) manufactured by Kureha Chemical Industry Co., Ltd.): a vinylidene fluoride resin layer And a laminated film composed of a polymethyl methacrylate resin layer and a “surface average roughness” of 0.006 μm on the surface to be bonded to the polyethylene resin. The “surface average roughness” is a center line average roughness Ra value measured by “Surface roughness / contour shape measuring device Surfcom 554A” manufactured by Tokyo Seimitsu Co., Ltd.

In FIG. 2, the paper base for the process paper (X) is pressed with a pressure roll 14 (made of silicone rubber, diameter 300 mm).
And a polishing roll 16 (diameter 1000 mm). At the same time, the vinylidene fluoride resin film serving as an overlay film was introduced between the two rolls so that the vinylidene fluoride resin layer faced the paper substrate side. Here, the pressing roll 14 and the polishing roll 1
The temperature of No. 6 was adjusted to 15 to 20 ° C using hot water. The rotation speeds of the pressure roll 14 and the polishing roll 16 were set to 106 rpm and 32 rpm, respectively, and the linear pressure between both rolls was adjusted to 0.2 kg / mm.

Process paper (X) The paper base material and the vinylidene fluoride resin film are formed by the pressing roll 14 and the polishing roll 1.
6, a molten polyethylene resin (B) used as a layer immediately before being rolled into the resin (resin used: LDPE, MI 3.5 g / 1)
0 min) from a 120 mmφ extruder (not shown) with an extrusion rate of 13
0 kg / h and molten resin temperature at lamination 340 ° C
With T die 20 (lip width 0.8mm, die temperature 330
C.) and introduced between the paper base of the process paper (X) and the vinylidene fluoride resin film (KFC film) at a position 250 mm below the die lip.

The formed vinylidene fluoride resin laminated film with process paper was drawn off at a line speed of about 100 m / min while being directed along the turning roll 18. The property values are shown in Table 1.
It was as follows. The depth of impregnation of the paper base material layer with the polyethylene resin was measured using a scanning electron microscope “S-80” manufactured by Hitachi, Ltd.
The cross section was observed by "0" and determined by photography. The adhesive strength in the table is based on the T-peel test (JIS K685).
4).

Using the vinylidene fluoride resin laminated film with the process paper obtained above, the film is superimposed on the surface of an internally illuminated advertising device display panel (58 mm wide × 100 mm long), heated at 130 ° C. and pressed. 2kg /
Laminated in cm ² . When the process paper was peeled off after the lamination, the entire surface was uniformly and quickly removed, and no wrinkles or blemishes were found in the vinylidene fluoride resin overlay film that appeared.

(Examples 2 to 3 and Comparative Examples 1 to 4) The production conditions of the molten resin temperature and the extrusion amount of the molten polyethylene resin are shown in Table 1.
A vinylidene fluoride resin film with process paper was manufactured in the same manner as in Example 1 except that the setting was made as in Example 1.
The polyethylene resin (LD) in each of Examples and Comparative Examples
Table 1 shows the temperature of the molten resin at the time of lamination of PE), the amount of extrusion, and the properties of the obtained vinylidene fluoride resin film with process paper.

[0037]

[Table 1]

[0038]

By using the vinylidene fluoride resin-laminated film with process paper provided by the present invention, the vinylidene fluoride resin layer-containing overlay film can be given an appropriate rigidity and can be suitably used with process paper. Since high adhesive strength is ensured, it is possible to laminate the object to be protected with good workability. In addition, wrinkles and bulges can be reduced in the overlay film after lamination, and the object as the overlay film can be sufficiently achieved.

[Brief description of the drawings]

FIG. 1 is a schematic cross-sectional view of a vinylidene fluoride resin laminated film with process paper of the present invention.

FIG. 2 is a schematic process chart showing a manufacturing process of a vinylidene fluoride resin laminated film with process paper of the present invention.

[Explanation of symbols]

Reference Signs List 1 paper base layer 2 ethylene resin layer 3 process paper 5 film containing vinylidene fluoride resin layer 12 support roll 14 pressure roll 16 polishing roll 18 turning roll 20 T die 22 process paper base material 24 containing vinylidene fluoride resin Film 26 Molten polyethylene resin 28 Vinylidene fluoride resin laminated film with process paper

Claims (4)

(57) [Claims] 1. A process paper (X) comprising a paper base layer (A) and an ethylene-based resin layer (B), the ethylene-based resin layer (B) and the fluorinated A laminated film in which a vinylidene fluoride-based resin layer (C) -containing film (Y) is laminated so as to be in contact with the vinylidene-based resin layer (C), and the thickness (TB) of the ethylene-based resin layer (B) ), The average roughness (RC) of the surface of the vinylidene fluoride resin layer (C) in contact with the ethylene resin layer (B), and the average of the surface of the paper substrate layer (A) in contact with the ethylene resin layer (B). RC + RA + 5 ≦ TB ≦ RC + RA during roughness (RA)
A vinylidene fluoride-based resin laminated film with process paper, wherein a relationship of +100 (the unit is μm for all terms) is satisfied. 2. The adhesive strength (S ₁ ) between the ethylene resin layer (B) and the vinylidene fluoride resin layer (C) is 0.1 to 3 g.
/ Mm, and the adhesive strength (S ₂ ) between the paper base layer (A) and the ethylene-based resin layer (B) is 1.5 times or more of (S ₁ ). Vinylidene fluoride resin laminated film with paper. 3. The ethylene resin (B) has a melt index {MI (190 ° C., 2.16 kg)} of 1 to 20 g.
The vinylidene fluoride resin laminated film with process paper according to claim 1 or 2, which is in a range of / 10 minutes. 4. A paper base and a vinylidene fluoride resin layer (C) -containing film (Y) are sheared at a shear rate of 120 sec.
4. A vinylidene fluoride system with process paper according to claim 1, wherein the adhesive is bonded with a molten ethylene resin whose resin temperature is adjusted so that the viscosity at ^{-1 is} in the range of 500 to 2500 poise. Manufacturing method of resin laminated film.