JPH03187742A - Opaque polypropylene composite film and laminate thereof - Google Patents

Abstract

PURPOSE:To obtain a composite film with high hiding power, good cushioning properties and good smoothness by laminating a layer A and a layer B each constituted by mixing a specified amt. of poly-4-methylpentene-1 (hereinbelow abbreviated as PMP) in a crystalline polypropylene (hereinbelow abbreviated as PP) contg. a crystallization nucleating agent and specifying a density, an optical concn., a cushioning ratio and a surface roughness of the surface of the layer B of a composite film. CONSTITUTION:An opaque polypropylene composite film is prepd. by laminating a resin layer (a layer B) wherein a crystalline PP contg. a beta crystallization nucleating agent is mixed with 1-9 wt.% PMP at least on one face of a resin layer (a layer A) wherein a crystalline PP contg. a beta crystallization nucleating agent is mixed with 10-40 wt.% PMP. The composite film has a density of 0.75 g/cm<3> or smaller, an optical concn. of 0.6 or larger, a cushioning ratio of 8 % or larger and a surface roughness (Ra) of the surface of the layer B of 0.30 or less. As this composite film especially exhibits excellent hiding power, good luster and good cushioning properties of the film, processability for printing is good and good finishing can be obtd.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to an opacified polypropylene composite film and a laminate thereof. More specifically, the present invention relates to an opacified polypropylene composite film with excellent hiding properties and cushioning properties, and a laminate thereof.

[Prior Art 1] Conventionally, the structure of an opaque polyester/fin film is to bind an inorganic filler such as calcium carbonate or an incompatible resin such as polyamide, polyethylene terephthalate, or polyoxymethylene, and then stretch the film. , it becomes opaque due to light scattering of the voids formed (Japanese Patent Application Laid-Open No. 61-1, No. 57547, Japanese Patent Publication No. 60-3779)
No. 3, etc.).

In addition, a technology to generate voids using the crystal modification unique to polypropylene has also been disclosed (Japanese Patent Publication No. 55-40
4] No. 1).

Furthermore, there are known methods for modifying the surface properties of opaque polyesters and methods for compounding the surface layer with a secondary resin composition depending on the purpose. No. 12642 describes Filno, whose surface layer is composited with a composition in which calcium carbonate particles are added to malmainic acid anhydride grafted polyolefin resin in order to impart printability and drawability. However, when a large amount of polyamide, polynisal, or inorganic filler is added as an incompatible component to produce a whitened film, the surface of the film becomes rough, probably due to the large volume of voids. In addition, the film surface is prone to delamination, and furthermore, there are disadvantages such as optical density unevenness within the film plane due to the difference in cohesive energy between the film and the incompatible borine.11
Furthermore, the method utilizing the crystal modification of polypropylon has problems such as insufficient hiding power, difficulty in controlling film forming conditions, and a tendency to cause unevenness in the degree of hiding.

Therefore, according to the present invention, 7) the film has a high hiding degree and has cushioning properties; −<::, and the surface has good smoothness, d)
Opaque polypropylene that improves the drawbacks of Minejo 1/
The purpose of the present invention is to obtain a composite fin and a laminate thereof.

[Means for Solving the Problems] The present invention is directed to the use of concreting volip Vj-bils containing β-product nucleating agents.
, / poly-4-methylpentene-1 to 10 =-・
At least one side of the resin layer (layer A) consisting of a 40% by weight mixture of 1 to 9% by weight of poly-4-methylbenzone-1 to crystalline polypropylene containing a β crystal nucleating agent.
In a composite film consisting of a laminated resin layer (B layer) formed by mixing two resin layers, the density of the composite film is 0.75 g/
cm3 or less, optical density is 0.6 or more, cushion ratio is 8
% or more, the surface roughness (Ra) of the Ka879 surface is 0°30
The object is to provide an opacified polypropylene composite film having the following characteristics.

The polypropylene (hereinafter abbreviated as PP) constituting the opacified polypropylene composite film of the present invention falls within the category of crystalline polypropylene, and is an α-olefin other than propylene monomer units. hmm,
It is permissible to contain monomers (such as butene, hexene, etc.), but it is preferable to contain monomers of 5 mol % or less based on the PP in order to improve the opacity.

In addition, the PP resin has an intrinsic viscosity ([η) of 1°, 4~
2.3 dl/g, isotactic index (I
N) is 96% or more, melt flow index (MF
The PP resin of the present invention is preferably 1° because I) is in the range of 100 to 10 g/l and 0 minutes because the physical properties such as the mechanical properties of the solvent and the uniformity of opacity are good. The β-crystal nucleating agent contained in is quinacridones, quinacridonequinones, etc.

Particularly preferred are γ-quinacridones.

The content of the β-crystal nucleating agent in the PI' resin in both layers A and B is ix i, o-6 to 1 x 10% by weight, which provides good hiding properties and prevents coloring by additives. This is preferable because it eliminates the problem of

Poly~4-methylpentene-] of the present invention, (hereinafter referred to as PM
(abbreviated as P) is preferably a homopolymer of 4-methylpentene 1, but is a copolymer in which 5 mol% or less of other monomers such as ethylene, propylene, butene, hexene, decene, etc. are copolymerized as a copolymerization component. It may be. Also, P
The melting temperature of MP is 230°C or higher, preferably 235°C or higher.

If the melting temperature is less than this value, the hiding properties of the film tend to be insufficient, which is not preferable. Further, the tVI w /M n of the PMP of the present invention is 6 or less. If Mw/Mn exceeds 6, it is not preferable because the hiding property is likely to be insufficient.

In addition, as a characteristic of the PMP, the melt crystallization temperature is 200
℃ or higher, isothermal crystallization time at 220℃ is 5 minutes or less,
A melt flow index of 1°0 to 80 g/10 min is preferable because it improves dispersibility and hiding properties.

Opacified polypropylene composite film of the present invention (hereinafter referred to as
The resin constituting the A layer of the composite film (sometimes simply referred to as a composite film) is a combination of crystalline PP containing a β crystal nucleating agent and PMP.
10 to 40% by weight, preferably 13 to 30% by weight.

If the content of PMP is less than the range of the present invention, the cushioning properties of the film will be insufficient, which is not preferable. In addition, if this range is exceeded, uneven dispersion of PMP is likely to occur,
This is not preferable because the film tends to break when stretched.

The resin of the B layer of the composite film of the present invention is crystalline PP containing a β crystal nucleating agent and PMP in an amount of 1 to 9% by weight, preferably 3 to 7% by weight. If the content of PMP is less than the range of the present invention, delamination at the interface with layer A tends to occur, and the degree of hiding of the film tends to decrease, which is not preferable. Moreover, if it exceeds this range, delamination on the surface of layer B tends to occur, and film tearing occurs easily in the film stretching process, which is not preferable.

The laminated structure of the composite film of the present invention is preferably B layer//A layer or B layer//A layer//B layer.

Particularly preferred are B layer//A layer//B layer. Furthermore, this composite film is a biaxially oriented film that has been stretched in the two wheel directions. A sequential biaxial stretching method is preferred as a method for imparting orientation to the film.

The thickness of the composite film is not particularly limited, but is preferably 15 to 200 μm, more preferably 20 to 75 μm.
It is μm. Further, the total thickness ratio of layer B to the thickness of the composite film is preferably 6 to 30%, more preferably 1
It is 0-25%.

The density of the composite film of the present invention (weight of a certain area of film/its area x thickness) is 0.75 g/cm 3 or less, preferably 0.65 to 0.45 g/cm 3 . If it exceeds the range of the present invention, it is not preferable because the cushioning properties of the film, which will be described later, will be difficult to develop. Also 0,45
If it is less than g/cm3, it is not preferable because the film tends to break during the film stretching process.

The optical density (OD) of the composite film of the present invention is 0°6 or more, preferably 0.7 or more. If it is less than the range of the present invention, the surface of the base becomes easily visible when laminated with other base materials such as paper, which is not preferable.

The cushioning ratio (ease of elastic deformation when pressure is applied to the film) of the composite film of the present invention is 8% or more, preferably 10% or more. If it is less than the range of the present invention, it is not preferable because it becomes difficult for the head to contact uniformly when printing or printing with a printer or the like.

The surface roughness (Ra) of layer B of the composite film of the present invention is 0.
It is 30 μm or less, preferably 0.25 to 0.08 μm. If it exceeds the scope of the present invention, it is not preferable because when an image is printed on the surface or transferred by a thermal transfer method, the sharpness of the image tends to be poor.

Next, the adhesive layer (C layer) of the composite film of the present invention is ethylene propylene random copolymer, ethylene methacrylate copolymer, ethylene acrylic acid copolymer, maleic acid grafted polyolefin, ethylene acetate vinyl ester. thermoplastic adhesive resin such as, or
Examples include polyisocyanate-based thermosetting adhesives.

Among these, when it is composed of an ethylene methacrylate ester copolymer and an ethylene propylene block copolymer, the ethylene methacrylate ester copolymer is particularly preferable because it has good adhesive properties with paper. In addition, when the zero layer is made of thermoplastic resin, the adhesive resin can be extruded and laminated by a known method using an extruder or the like. Although extrusion lamination may be carried out in-line or off-line, in-line extrusion lamination is preferred as it is easy to obtain a laminate and does not impair the cushioning properties of the composite film of the present invention.

Adhesive HCC layer) is 1. rb1. If the main component is a mixture consisting of a dimethacrylic acid monoester copolymer and an ethylene propylene monoblock copolymer, it can be extruded in-line! It is preferable to laminate and laminate.

Here, ethylene methacrylic acid y, stell copolymer is a copolymerization of ethylene and methacrylic ester,
Specifically, there are methyl methyl methacrylate, methyl ethylene methacrylate, and the like. The copolymerization ratio is
Preferably, the amount of methacrylic acid ester is 5 to 30% by weight, more preferably 5...20% by weight. good. As for the copolymerization method, Landano 7 and copolymer are preferred.1.
3. What is ethylene propylene/block copolymer?

It refers to a block copolymer of tyrene and propylene, and the amount of thione is preferably 10 to 30% by weight.

The mixing ratio of the ethyl I non-methacrylic acid ester copolymer and the L ethylene propylene block copolymer is J. -L copolymer is 80==9
3% by weight, and preferably 7 to 20% by weight of the JT-chi 1/゛/propylene 1 non-block copolymer. Also l1il jin,
A tackifier such as terpene or petroleum resin may be added in an amount of 10% by weight or less3. It is also preferable to perform a co-discharge/discharge treatment on the surface of the C layer in order to improve adhesion.

The adhesive layer (Cj end) is laminated 1.7 The laminated structure of the composite film of the present invention is B layer//Layer//C layer, B layer//A layer/
/13 layer//C layer is preferable. At this time, the laminated thickness of the C shoes is preferably 3 to 30 μm L2.

The composite film of the present invention can be used as a single film or in the form of a sheet for packaging, packaging, and labels. 1: It can also be used by laminating a laminated base material such as paper or resin film.

The paper to be laminated with the composite film of the present invention is not particularly limited, but plain paper made from cellulose such as high-quality paper, art paper, and paper is preferred.

The resin film of the present invention to be laminated with the polyester film is made of polyester, polyolefin, polyamide,
These include borophene 1/2/sulfide, borica to bonate films, etc. Particularly preferred are polyethylene film, Dilente 1 Nofta 1 Note film, and polypropylene film. In addition, Bollier, Chi" 1., / 2151 / Lid 1 note film is particularly preferably a biaxially stretched biaxially oriented film, transparent type or titanium oxide:
/, particles of calcium carbonate, barium sulfate, etc. can be added or an opaque type can be used.

Also, polypropylene 1 non-film is particularly preferred.
, < is a biaxially oriented film 11 that has been stretched 8-axis. The film type 7 is a transparent type 9, or an opaque type containing particles such as titanium oxide, calcium carbonate, barium sulfate, etc. can also be used.

The structure of the laminate of the present invention is BJFj//A layer//CR/
/Laminated base material, B layer//ΔHa//B layer//Layer/
/ The laminated base material is used.

The thickness of the laminated base material of the laminate of the present invention is 75-250
L2 is preferably in the μm range. Further, the total thickness of the laminate is preferably in the range of 1-00...300 p rri.

1) A typical manufacturing method of the opacified polypropylene non-composite) and ilm of the present invention will be described below.

A-layer resin and B-layer resin consisting of a mixture of crystalline P ax P MP containing a β-crystal nucleating agent are fed to two separate extruders at 11.280°C or higher, preferably <
melts at a temperature of 290-320℃! 7. Guide the melt into a multilayer molded 11-karat gold layer, and form the B layer//A layer, B layer//Δ layer//B
[After merging within 1 gold layer, layer J]
Shape into shape. In addition, another lamination method 2-2 is [1] of gold.
After the A-layer resin and the BJi resin are combined in a short pipe, the resin can be formed into a T-shaped sheet using 1 gold. The laminated sheet is wound around a drum at a temperature of 40 to 110°C, preferably 50 to 90°C, so that the extruded sheet is maintained in a high temperature range of 60 to 120°C. Cool and mold. In order to effectively carry out the present invention, the molten sheet is extruded at a temperature of 290°C or higher, formed into a sheet, wrapped around a drum at a temperature of less than 70°C, cooled and solidified, and the molten sheet is formed at a temperature of 40°C or lower. It is preferable to blow air at a temperature of about 100 mL from a slit-shaped nozzle or a nozzle or press it with a small-diameter cooling roll to bring it into close contact with the drum surface and cool and solidify it, since this increases the glossiness and optical density of the film. Next, the formed sheet was
It is heated to a temperature of 10 to 140°C, stretched 4 to 6 times in the longitudinal direction between rolls with different circumferential speeds, and immediately cooled to room temperature. The stretching temperature at this time is preferably a lower limit temperature that does not cause necking stretching, that is, a range of 110 to 130°C, since this improves the cushioning properties of the film. The stretched film is introduced into a tenter and stretched in the width direction at a temperature of 150 to 170°C.
It is stretched 10 times, then heat-set at a temperature of 150 to 170° C. and wound up while giving relaxation of 12% or less in the width direction.

The preheating temperature of the film during stretching in the width direction is preferably in the range of stretching temperature to stretching temperature + 15°C, since this makes it difficult for the film to break during stretching.

The stretched film of the present invention is preferably subjected to a sequential biaxial stretching method, and a simultaneous biaxial stretching method is not preferred because it is difficult to develop hiding properties.

Next, a method for manufacturing the laminate of the present invention will be described.

The method of laminating the adhesive layer (C layer) in-line is to extrude and laminate the 0-layer resin onto the stretched film stretched in the longitudinal direction in the above film forming process, guide the laminated sheet into a tenter, and stretch it in the width direction. used. Specifically, the 0-layer resin is supplied to an extruder and melted at a temperature of 200 to 260°C, then guided to a crow-mouthed die and formed into a sheet, and the molten sheet is heated at a temperature of 10 to 30°C. There is a method of laminating and pressing a stretched film between a cooling roll and a rubber roll to form a C layer. Further, the C-layer surface of the composite film on which the C-layer is laminated is superimposed on the laminated base material, and the composite film surface is heated and pressed with a heating roll at a temperature of 80 to 140° C. to form a laminate.

When forming the C layer by extrusion lamination off-line, there is a method of melting the thermoplastic resin that will become the C layer using an extruder, etc., and extrusion laminating the molten sheet between the composite film of the present invention and the laminated base material. used.

In addition, when forming the C layer with a polyisocyanate-based thermosetting adhesive, a solution of the polyisocyanate-based adhesive is applied to the surface of the composite film of the present invention on which the C-layer is not laminated using the metaling bar method. It is coated using a coating method such as a gravure roll, and the solvent is dried with hot air at a temperature of 50 to 100°C to form a C layer. The coated film is overlapped with the laminated base material so that the coated side becomes the laminated base material surface without aging, and after heating and pressure bonding from the coated film side with a metal roll at a temperature of 60 to ioo'c, Aging at a temperature of 40° C. for 72 hours can cure the adhesive and yield a laminate.

Depending on the purpose, the composite film of the present invention may contain an antistatic agent,
Additives such as weathering agents and antifogging agents may also be added. Also,
For the purpose of improving adhesiveness, a known treatment such as corona discharge treatment may be performed in an air atmosphere, an inert gas atmosphere, or the like. In particular, it is preferable to subject the surface of the C layer to corona discharge treatment in a mixed gas atmosphere of carbon dioxide and nitrogen gas to facilitate adhesion.

The composite film of the present invention can be used after being subjected to embossing, printing, extrusion lamination, or coating depending on the purpose.

The opaque polypropylene composite film of the present invention has particularly excellent hiding properties, good gloss, and because of the film's cushioning properties, it has good processing properties such as printing, and can be finished neatly. It is suitable for wrapping and decorating confectionery and snacks, and also has good properties for various printing papers and adhesive bases. It is particularly suitable as a heat-sensitive image-receiving sheet.

[Effects of the Invention] The present invention applies a specific stretching process to a specific mixture sheet of crystalline PP and PMP containing a β-crystal nucleating agent to generate a large number of fine voids in the film. In addition to providing cushioning properties, the surface properties of the film have been improved, making it easier to adhere to the print head during processing such as printing, resulting in a better finish. Furthermore, by laminating the composite film of the present invention on the surface of a base material such as paper, cushioning properties, smoothness, etc. can be easily imparted to the surface of the base material, which is economically advantageous.

[Characteristics evaluation method] Next, a method for evaluating characteristics related to the present invention will be described.

(1) Optical density (OD) Measured using a Macbeth Densitometer T D 50 J [5
Ta. When the amount of incident light is 1° and the transmitted light is Ill, OD = 1
Defined as 0gxo (I/Io). This value is expressed as a value converted into a film thickness of 35 μm: 1i I knee.

(2) Glossiness, according to TIS-2874 (60° -60°).

(3) Film thickness dial gauge type thickness meter (TIξ;-B-7509
, measured using a measuring head 5rnrnφ flat type). , :.

(4) Melting temperature (Tm), and melt crystallization temperature (Tm
e) Differential scanning thermometer (DSC type 2, manufactured by PerkinElmer)
The melting temperature (Tm) is defined as the melting endothermic peak temperature accompanying crystal dissolution when 5 mg of the sample is heated from room temperature at a heating rate of 20° C./min. Then, 280
The peak temperature of the latent heat associated with crystallization is the melting crystallization temperature (Tme
) I heard it.

(5) Delamination on the film surface. On the film surface, apply cellophane tape with a width of 13 mm1, manufactured by Chiban Co., Ltd., NO.
405) was pasted to a length of 50 nm, and peeled off by hand (speed: about 200 ynrn/5ee) [, the judgment was made by the presence or absence of creases in the surface layer portion of the film surface.

((3) Mw/Mn The weight average molecular weight (
MW) and number average molecular weight (Mn), and their ratio is calculated as M
Let w/M be n.

The conditions are as follows.

Equipment: GPC-150C (WATER3) Column: 5
hodex KF-80M (Showa Denko) Solvent 20-dichlorobenzene (C, 1% ionol added, 135°C) Sample concentration: 0.2 (wt/vol)% Flow rate: 1 m
l/n1in Molecular weight calibration: Cushion ratio of monodisperse Borystinone (7) film In a convex dial gauge thickness gauge, the radius of the tip is 0.
A film sample is sandwiched between a 5ROM convex bottle and a flat plate stand, and the film thickness (A) when the load on the bottle is 50 g and the film thickness (B) when the load is 500 g are measured17. The cushioning ratio (C) of the film was determined.

Cushion ratio of the film (C) (8) Film density (30 x 30 cm') overlap (g) of the film thickness (ern) x film size (cm2)
) is the value (g/ern').

(9) Surface roughness (Ra) JIS-
The centerline surface roughness of the sample was measured using a stylus surface roughness meter (ET-10 manufactured by Koita Research Institute) according to B~-0601. The cutoff was 0.25rnrn. The sample length is 4 rnm.

[Examples] The present invention will be described in detail below using Examples and Comparative Examples.

Examples 1-5, Comparative Example 1 - Crystalline 1'P resin containing 0,0006% by weight of γ-quinacridone (intrinsic viscosity: 1°8 dl/g).

MI: 3°Og / ], PMP pellets at 09 minutes (
Mw/Mn: 4.0, Tm: 240°C, Tme: 218
℃) was added in the amount shown in Table 1, the resin mixture was fed to a twin-screw extruder, melted and mixed at a temperature of 2.280℃, pelletized,
A layer resin and B layer resin were prepared in advance. The pellets of A-layer resin and B-layer resin are each supplied to two extruders, melted at a temperature of 300°C, and the respective melts are transferred into a short tube to form B layer//A layer or B layer//A. The mixture was combined to form layer//B layer, introduced into a T-type die, formed into a sheet, wound around a drum at a temperature of 65° C., and cooled and solidified into a sheet. At this time, the molten sheet was molded by blowing compressed air at a temperature of 25° C. from a slit-shaped nozzle, so that the sheet was cooled uniformly. The sheet was preheated to a temperature of 115°C, then stretched 5.0 times in the longitudinal direction between rolls at different speeds at a temperature of 122°C, and immediately cooled to room temperature. Next, the stretched film was introduced into a tenter, preheated to a temperature of 170°C, and then stretched 9°0 times in the width direction at a temperature of 160°C, and then stretched 16° while giving 8% relaxation in the width direction.
After heat treatment at a temperature of 0° C., it was cooled and wound up.

The film properties are shown in Table 1. The films within the scope of the present invention had good hiding properties and excellent cushioning properties. However, in Comparative Example 1, the amount of PMP added in the B-layer resin was higher than the range of the present invention, so film breakage occurred in the transverse stretching process, so Comparative Example 1 was obtained by changing the longitudinal stretching temperature as follows. That is, the obtained unstretched laminated sheet was preheated to a temperature of 125°C, and then heated to a temperature of 135°C.
The film was stretched 5.0 times in the longitudinal direction between rolls at different speeds at a temperature of 100 mL, and immediately cooled to room temperature. The subsequent conditions are as in Example 1.
It was made into a biaxially stretched film.

The properties of the film were as shown in Table 1.

Comparative Examples 2 to 3 PMP resin (Mw/Mn:
4.0, Tm: 240°C, Tmc: 218°C) 15% by weight mixture was used as the A-layer resin, and a pellet containing only crystalline PP (intrinsic viscosity: 1.6 d l/g) was used as the B-layer resin.
, MI: 6. Prepare a laminated sheet of B layer//A layer//B layer by the method of Example 1, preheat the sheet to a temperature of 125°C, and then heat the sheet at different speeds at a temperature of 135°C. It was stretched 5.0 times in the longitudinal direction between rolls and immediately cooled to room temperature. The subsequent conditions were the same as in Example 1, and a two-wheel stretched film was obtained. The properties of the film were as shown in Table 1. The film had insufficient hiding properties. Further, as Comparative Example 3, extrusion of the B-layer resin at this time was stopped, and a single-layer sheet of the A-layer resin was obtained. The sheet was made into a sequentially biaxially stretched film in the same manner as in Comparative Example 2. The properties of the film were as shown in Table 1. In the comparative example, under low-temperature longitudinal stretching conditions suitable for increasing the cushioning properties of the film, film tearing occurred in the subsequent transverse stretching step, resulting in poor cushioning properties.

Examples 6-7 γ-quinacridone as PP resin o, oo.

Crystalline PP resin containing 6% by weight (intrinsic viscosity = 1°8d
l/g, MI: 3. PMP pellets (Mw/Mn: 4.0, Tm: 240°C, Tm
The A-layer resin is a resin containing 20% by weight of c: 218°C), and the crystalline PP resin containing 0.0006% by weight of γ-quinacridone as a PP resin (intrinsic viscosity: 1.8d).
l/g, Ml: 3. PMP pellets (Mw/Mn: 4.OlTm: 240°C, Tmc
:218℃) was prepared in advance as a B layer resin, and the B layer//A layer and B layer were prepared in advance by the method of Example 1.
A laminated sheet of layer //A layer//B layer was obtained respectively. The sheet was stretched in the longitudinal direction by the method of Example 1 to obtain a stretched sheet. As a 0-layer resin, a resin obtained by mixing ethylene ethyl methacrylate (ethyl methacrylate component; 15% by weight) with 15% by weight of ethylene propylene block copolymer (ethylene content; 25% by weight) was supplied to an extruder, and
The molten sheet is melted at a temperature of 0°C and formed into a sheet using a glass slot type mouthpiece, and the molten sheet is passed between a cooling roll and a rubber roll at a temperature of 15°C, and then bonded by heat and pressure onto a stretched sheet to form a layer B//A. Layer //C layer and B layer//A layer//B layer/
/C layer laminated sheet. The laminated sheet was stretched in the width direction by the method of Example 1 to obtain a biaxially stretched composite film.

The properties of the film were as shown in Table 1.

Example 8 Both sides of the opacified polypropylene composite film of Example 3 were subjected to corona discharge treatment (treatment in air, treatment intensity: 40 w/
m"/min), and polyiso zipper 1.=, -1=system W2, F on one side of the surface.
Agent (1) Mix equal amounts of Honboritoshi 1./Tan Kogyo (manufactured by Tan Kogyo Co., Ltd.), Tsubofun 2301' and 2'1W:1-1.'', f:', ', composition) 14. The 20% by weight solution was subjected to a gravure roll method and then dried with hot air at 80°C for 0 seconds. ．． The film was placed on 15 (1μ) paper with the top side facing the paper, and heated at a temperature of 100°C. The 1゛-neutral surface passes through the heated geol side 11 (71.) between the
It was heat-pressed. "] - The rotational speed i4 of the wheel is i, Oun /
1 knee, heat the laminated sheet at a temperature of 40°C for 72 hours, 2, apply the adhesive to V! Chemical 15, or 1. ) was obtained.

Example 9 The S: face 11. of the 0 layer of the opacifying bolino "vlI::r-len compound-containing noylno" of Example 0 is -M DI "j.
J5 to electric 491, treatment (air treatment, treatment strength; 40
Apply iw / vm 2 / r [1 effect ■] 1-2, and the surface of the C layer on the other side (carbon dioxide and nitrogen) gas (15,...
,,, / 81J1 volume ratio) mixed gas atmosphere 'IAI Season 9
Medium〈;li I::::::N J・Discharge 4ψ・Processing intensity; (30W/n12.In r+)a applied I21
, 1.5. on the C, -Q plane. , Off+-n 17')
7-p 1<, and double 'I'1 combination 43 ``?:' ,,
The thermopress tube 1 was passed between a heating roll at a temperature of 110 DEG C. and rubber D to one mile so that its surface was on the heating +1111111 - side. The rotation speed of rR-ru is 1. O
The laminate sheet had a shoe ratio of 18%, which was an excellent result.Example 10 Polymer was added to the surface of layer B of the laminate of Example 8. Isocyanate-based adhesive (manufactured by Nippon Polyurethane Co., Ltd.), a mixture of equal amounts of Tuboran 2301''' and Coronate 17'' [,,y
i: 10% by weight solution of composition) in a metal ring 27
: &= , J:: R::, r-1□ 1. ,,,,
,． A coating film with a thickness of 065 μm was formed by heating with hot air at 80°C for 30 seconds, and the following image-receiving layer 2- was coated on the surface by the metaling bar method [1-1-[2, ,
After drying, the image-receiving layer with a film thickness of 'l-OII rn was formed into a shape of 11.

(1 piece of folding with 949 layers) ・Shokuhowa 1-Shichiri 1-cho, Su-a-ru: Toyobo Bay 11, mixture of 200 and 300
20'T# (amount %・syring, 1
32. O Heavy No. 4%-l-ru J
, 78% by weight of methyl fluoride.
'=・1], J&bi5INARP GZ, -Y'i00
Image 4 on the image receiving sheet 1 made using the laminate of the present invention with a thermal transfer of 5"/771" C5:
As a result of the transfer, a clear image was obtained with no image omissions or defects such as circles or squares.

Claims (5)

[Claims] (1) A β-crystal nucleating agent is contained on at least one side of a resin layer (layer A) formed by mixing 10 to 40% by weight of poly-4-methylpentene-1 with crystalline polypropylene containing a β-crystal nucleating agent. In a composite film formed by laminating a resin layer (layer B) made of crystalline polypropylene mixed with 1 to 9% by weight of poly-4-methylpentene-1, the density of the composite film is 0.75 g/cm^3 Below, the optical density is 0.6 or more, the cushioning ratio is 8% or more, and the surface roughness of the B layer surface (
An opacified polypropylene composite film characterized in that Ra) is 0.30 or less. (2) Layer B on one side of layer A, adhesive layer (C
The opacified polypropylene composite film according to claim 1, characterized in that it is formed by laminating layers). (3) The opaque polypropylene according to claim (1), wherein the B layer is laminated on both sides of the A layer, and an adhesive layer (C layer) is further laminated on the surface of one of the B layers. composite film. (4) The opacified polypropylene composite film according to claim (2) or (3), wherein the adhesive layer (C layer) is composed of an ethylene methacrylate ester copolymer and an ethylene propylene block copolymer. . (5) A laminate, characterized in that a paper or resin film is laminated on the surface of the C layer of the opacified polypropylene composite film according to any one of claims (2) to (4).