JPS614732A - Surface-roughened film - Google Patents

Abstract

PURPOSE:A surface-roughened film having good dullness and light transmission and large adhesiveness to a metallized layer, prepared by melt-extruding a mixture of an ethylene component-based polymer and an ethylene/propylene random copolymer into a film. CONSTITUTION:A film is formed by melt-extruding a mixture of (A) about 5- 35wt% polymer component H having 80wt% or above ethylene component, (B) about 40-95wt% propylene (and/or butene-1)/ethylene random copolymer component R and (C) other olefin polymer component in a total amount of 100wt%. The limiting viscosity, (eta)H, of polymer component H is 1.5-10dl/g and the difference between the limiting viscosities of polymer components H and R [(eta)H- (eta)R] is 0-9.8dl/g.

Description

TECHNICAL FIELD OF THE INVENTION The present invention relates to a roughened film, and more particularly to a roughened film suitable for metal vapor deposition applications.

[Prior art]

Conventionally, many films with polypropylene resin as the main component have been developed as roughened films, but as roughened polypropylene films with such rough surfaces, there are films in which other polyolefins such as polyethylene are added to polypropylene, and foamed films. A special nucleating agent such as a quinacridone derivative is added to polypropylene, which is then melt-molded to create a polypropylene sheet with a β-type crystal structure, which is then stretched to form a film, or inorganic fine particles are added. Films, etc. have been proposed.

[Disadvantages of conventional technology]

These roughened films have a low degree of roughening,
They have problems such as low light transmittance, an inappropriate balance with other physical properties, and the appearance of flickering inorganic fine particles, and considerable improvements are needed.

Further, even if a metal vapor deposited layer is provided, the adhesive force with the vapor deposited layer is insufficient, and it is easily damaged and peeled off due to friction.

[Purpose of the invention]

The object of the present invention is to solve the above-mentioned drawbacks, namely, to provide a material that has excellent matting properties, high light transmittance, does not easily vary depending on manufacturing conditions, and has high adhesive strength to metal vapor deposited layers. The present invention aims to provide a roughened film.

[Structure of the invention]

In order to achieve the above object, the present invention has the following configuration, that is, a roughened film consisting of a polymer mainly consisting of a polymer part H and a polymer part R, where the polymer part H is
The ethylene component is 80 wt% or more, the polymer part R is formed by random copolymerization of at least one of propylene and butene-1 and ethylene, and the intrinsic viscosity [η] of the polymer part H and the polymer part R are Intrinsic viscosity [η] 3
The difference ([η]H - [η]H) is O~9.8d M /
g, [η]H are 1.5 to 10d Q/CI.

The polymer part H in the present invention is a part in which ethylene is homopolymerized, and the ethylene component is sowt% or more, and other α-olefins may be copolymerized with less than 20wt%.

The polymer portion R in the present invention is a random copolymerization of at least one of propylene and butene-1 and ethylene. This polymer part R has an ethylene component of 0.5 to 15 wt%, (preferably 1 to 8 wt%) of ethylene and propylene, ethylene and butene, or
Propylene component 70-98wt%, ethylene component 0.5
Preferably, it is a portion in which ~15 wt% (preferably 1~8 wt%) of ethylene, propylene, and butene are randomly copolymerized.

The intrinsic viscosity [η]H of the polymer part H is 1.5 to 10 dl/
g, and the difference between the intrinsic viscosity [η]H of the polymer part R ([
η]H-[η]7) must be between 0 and 9.8 dl/g1, preferably between 0 and 8 dQ/Q. [η rice is 10
If it exceeds dl/g, fish eyes will occur and surface defects will occur, and if it is less than 1.5 dQ/a, sufficient matting properties will not be obtained. In addition, [η]H−[η]H has a close correlation with the roughening state of the film surface,
[η - [η The roughness of the kneaded surface becomes thicker as the kneading becomes larger.

However, when [η]-[η]2 exceeds 9.8, the surface roughness becomes too large, the light transmittance decreases, and the film surface becomes whitish. Furthermore, even if it is deposited on the surface, it becomes lead-colored and loses its sense of luxury. When [η]day - [η]k becomes a negative value, the surface roughness decreases and the surface becomes sufficiently matte.
I can't get the desired characteristics.

The roughened film of the present invention is mainly composed of a polymer part H and a polymer part R, preferably, the polymer part H is 5
~35W1%, the polymer part R is 40 to 95 wt%, the sum of the polymer part H and the copolymer part R is more than sowt%, and when the sum is less than 100%, an olefin-based composition, preferably propylene, α-olefin homopolymers such as butene-1 and ethylene content of 15 wt%
% and less than sowt% of ethylene-pro, pyrene copolymer may be mixed or copolymerized.

The polymer forming the roughened film of the present invention is
A block copolymer having a polymer portion H and a polymer portion R is preferred.

Further, when polypropylene is contained in the roughened film of the present invention, it is preferable that the content be less than 30 wt% since this will not reduce the adhesion strength of the film when a vapor-deposited film is formed.

The ethylene blocking property of the polymer forming the roughened film of the present invention is expressed by the block index. The larger the block index is, the higher the blockiness is, indicating that there are more parts where ethylene is block-bonded in the copolymer. The block index is calculated from the infrared absorption spectrum in a 20°C atmosphere.

That is, the absorbance A731 of 731 cml due to ethylene and Lua20 due to ICH2fn, n≧5
The absorbance A in cm and ILO were measured, and the block index K was calculated by the following formula.

A, = log(d) 729 no I K = 7 A/A, (T: Transmittance (%) To = 731 cm-' of baseline or 720
Transmittance (%) at cm-' However, as a baseline, the above infrared absorption spectrum is around 770 cm-' and 650 cm-1
Use a tangent line drawn near the area.

The block index of the roughened film in the present invention is 0
．． 9 to 1.8 are preferable, and 1.1 to 1.6 are more preferable. When the block index is within this range, the light transmittance is high, the matting property is also good, and the adhesion of the metal film when metal vapor deposition is performed on the roughened side is high, which is preferable.

Further, the roughened film of the present invention has a surface roughness R4 (center line average roughness, value measured at a cutoff value of 0.25 mm, JIS B 0601) of 0.2 μ or more, preferably 0.2 to It is desirable that the thickness be 1.5μ. In addition, the haze level (JTSK6714) is 35% or more, and the gloss level (G
S-60”, JIS Z 8741 Method 2>
is more preferably 50 or less.

Furthermore, the polymer forming the roughened film of the present invention has a "low temperature side of 126°C or more and less than 140°C (preferably 126°C or more and 135°C or less)" and a "low temperature side of 140°C or more and 160°C or more".
It is preferable that one apex of the melting peak exists on the high temperature side of 140°C or lower (preferably 155°C or lower), and the heat of fusion H1 of the peak on the low temperature side and the melting peak of the peak on the high temperature side When heat H2 is used, the value calculated by the following formula R is preferably 0.3 to 0.7, more preferably 0.4 to 0.6.

R=)-+1/ (Hl +H2> When the above-mentioned value of R is within this range, the matting property, the uniformity of the rough surface of the film, and the light transmittance will be good.

Note that the apex of the melting peak and the heat of fusion as used in the present invention are obtained from the following differential scanning calorimetry. That is, Perk
in -E Imer differential scanning calorimeter Modej
Using the DSC-2 model, a 5 mg sample was heated to 280°C at a heating rate of 20°C/min, held for 5 minutes, cooled at a circumferential speed, and then heated again, resulting in a so-called second run. Take the melting curve of Examples of this curve are shown in FIGS. 1 and 2. In the figure, among the melting peaks, the melting peak on the low temperature side is Pl, and the melting peak on the high temperature side is R2. Also, the apex of each melting peak, that is, the minimum point of the peak, is
B, and the temperatures at the apex are Tm1 and Tm2, respectively.

Next, the method for determining the heat of fusion is shown by the first peak P1 in FIG.

First, the absorption start point T1 and end point T2 are connected by a straight line (broken line C in FIG. 1) to form a baseline. The intersection of the extrapolation line of the straight line part in the first half of the peak and the base line is T6, the intersection of the extrapolation line of the straight part in the second half of the peak with the base line is T6, and the part surrounded by the peak, extrapolation line, and base line (shaded part) The area is defined as the heat of fusion H1.Similarly, the heat of fusion H2 at the second beak P2 is determined.

However, as shown in FIG. 2, the end point T of the first peak P1
2 and the starting point T3 of the second beak P2 overlap and become one point, and if it deviates from the baseline C connecting T1 and T4, the intersection with the baseline C drawn perpendicularly from the point is set as T9, and the second half of the peak ( In the case of the second peak P2, the straight line portion of the first half of the peak) is connected to T9, and the area is determined by regarding that line as an extrapolation line.

In addition, the ethylene content of the roughened film of the present invention is determined by the content of the polymer part H1 polymer part R and other components, but in order to obtain sufficient matting properties, it is necessary to
owt% is preferred, and 15 to 45 wt% is more preferred. If it is less than 8 wt%, the matte property will be low, and the eo
When it exceeds wt%, light transmittance is low, and defects such as unevenness on the film surface tend to occur.

Furthermore, if necessary, various commonly used additives such as stabilizers, antistatic agents, and lubricants may of course be used.

The roughened film of the present invention can have sufficient matte properties even if it is an unstretched film, a -axially or biaxially stretched film, but the uniformity is better when it is a stretched film. This is more preferable since it provides matte properties with excellent density. - For axially stretched films,
Either the vertical axis or the horizontal axis may be used.

Further, the film structure may be either a single film or a laminate (with a roughened layer on one side or both sides), but a laminate stretched film has better matte properties. In this case, polypropylene is preferred as the base polymer. Examples of polypropylene include propylene homopolymers, mixtures of propylene homopolymers and other types of olefin polymers, and blends of propylene homopolymers and olefin copolymers. Note that the lamination may be performed before coextrusion, uniaxial stretching of the base film, or before or after biaxial stretching.

The thickness of the roughened film of the present invention is not particularly limited, but
3 to 100μ for a single film and 0.0μ for a laminated film.
5-10μ is preferred.

The roughened film of the present invention has strong adhesion to metal vapor deposited films and is an excellent film as a vapor deposited film.

The metal used for metal vapor deposition is preferably aluminum.

As the metal vapor deposition method, an electric heating fusion vapor deposition method, an ion beam vapor deposition method, a sputtering method, an ion blating method, etc. are used. Note that it is preferable that the surface on which the metal is deposited be activated by surface treatment such as corona discharge treatment, fire treatment, or acid treatment.

Further, the roughened film of the present invention includes a layer of polymer W on one side, that is, a random copolymer of at least one of propylene and butene-1 and ethylene,
Ethylene component 1 to 15 wt% Surface roughness R (l is 0.15
Laminating polymer layers of μ or less provides an even better film for vapor deposition. In this case, the laminated film may have a two-layer structure consisting of a roughened film and a layer of the random copolymer W, but from the viewpoint of mechanical strength, a biaxially stretched polypropylene film layer is interposed between the two layers. The configuration is particularly preferred.

The surface of the layer of polymer W is not only a metal vapor deposited layer, but also
It has high adhesion to paper and black film,
When metal vapor deposition is performed on the smooth surface, a vapor deposited film having excellent mirror-like gloss can be obtained. In addition, since the surface of polymer W is smooth, it has good blocking resistance and
Although it has poor slip properties, it has a roughened layer on one side, so
Blocking resistance and slip properties are not impaired.

Note that the surface of the polymer W layer is preferably activated by surface treatment such as corona discharge treatment in terms of adhesion to the metal vapor deposited layer, paper, and other films.

The polymer W layer has an ethylene component of 1 to 15% by weight.
, preferably 2 to 10% by weight, and is a film made of a random copolymer of ethylene and at least one of propylene and butene-1. Specifically, it consists of ethylene-propylene random copolymer, ethylene-butene random copolymer, ethylene-propylene-butene ternary random copolymer, and blends thereof, as well as homopolymers such as polyethylene, polypropylene, and other α-olefins. It's okay if it's done. However, when blending an α-olefin homopolymer, the content is preferably less than 30 wt % because the metal vapor deposition layer and the adhesive layer with paper and other films deteriorate.

The polymer W of the present invention is a polymer in which ethylene is randomly copolymerized, and has a block index of 0 to 0.7, preferably 0 to 0.3, and the smaller the block index, the more
The film surface has excellent smoothness.

The surface roughness Ra of the layer of polymer W should be less than 0.15μ, preferably less than 0.1μ.

Here, the surface roughness Ra refers to the center line average roughness (cutoff value 0.25 mm), and is based on JIS B 060.
It is based on 1. Note that the lower limit of the surface roughness Ra is
Although not particularly limited, a thickness of about 0.01 μm is desirable from the viewpoint of film production.

When the ethylene component of the polymer W is less than 1% by weight,
Adhesive strength is weak, and adhesion to paper and other films is also poor.

If the ethylene component exceeds 15% by weight, the ability to retain the above-mentioned specific phase will decrease. When the surface roughness Ra exceeds 0.15, sufficient smoothness cannot be obtained on the film surface.

Further, if necessary, a crystallization nucleating agent may be added to the random copolymer W to make the generated crystals finer and thereby smooth the surface.

When a blend or the like is used as the polymer W, the ethylene component refers to the total ethylene component including the ethylene components of each blend.

Quantification of ethylene content is usually done using infrared absorption spectroscopy at 11'70 cm-1 or 731 at 160°C.
It can be determined by the calibration curve method from the absorbance ratio in cm'.

The thickness of the polymer W layer is not particularly limited, but is 0.5 to 1
0μ is preferred.

When the roughened film of the present invention is made into a laminated film with one side of the film and a layer of random copolymer W on the other side, one side is rough and the other side is smooth, and the metal vapor deposition layer is On the other hand, since it has a strong adhesive layer, when producing a vapor-deposited film laminated paper or a laminated film, various appearances can be obtained depending on which side is used as the vapor-deposited surface or the laminated surface.

In other words, by using the laminated film of the present invention, regardless of whether matte properties or mirror-like gloss are required, by appropriately selecting the vapor deposition surface and the surface to be bonded to paper, it is possible to meet the requirements. can be satisfied.

In the present invention, printing may be applied to the film surface or the vapor deposition surface of the laminated paper, if necessary. In this case, manufacturing capacity can be improved by adopting a method of manufacturing laminated paper in which a laminated film or vapor-deposited film is printed in advance and then laminated onto paper.

Next, an example of the method for manufacturing the roughened film of the present invention will be described. .

After melt-extruding a polymer mainly consisting of polymer part H and polymer part R into a sheet, an unstretched sheet is obtained which is cooled and solidified. When making a laminated film, polypropylene is simultaneously extruded with the above polymer, and an unstretched sheet is obtained in the same manner. Further, in the case of forming a stretched film, it is further heated and stretched vertically, horizontally, or both. Note that the longitudinal stretching temperature is 120 to 150°C, and the transverse stretching temperature is 150 to 150°C.
As for the biaxial stretching method, which is preferably carried out at 165°C, either sequential or simultaneous stretching may be used. Further, in the case of forming a laminated stretched film, the co-extrusion method is not limited to the above-mentioned co-extrusion method, and it may be applied before or after -axial stretching, or before or after biaxial stretching.

Stretched film is heated to 100 to 160℃ after stretching as necessary.
It may be heat treated.

The matte laminated film thus obtained is suitable for use in print lamination to be applied to printed matter. It is also used as a dielectric for plywood release, drafting, printing, free albums, labels, packaging, decoration, adhesive tapes, insulating oil impregnation, and condensers.

It is also preferably used for vapor deposition as a soft, glossy film, and the film deposited on a specific ethylene-propylene copolymer has extremely strong adhesion strength, making it suitable for vapor deposition applications.

〔Effect of the invention〕

Since the roughened film mainly consists of the polymer portion H and the polymer portion R, the following effects can be obtained.

■ It has excellent matte properties and high total light transmittance, so when used in combination, the underlying print can be clearly seen.

◎ Since the apex of the melting peak was set at 126° C. or higher, it was possible to eliminate the drawback that the matte property disappears depending on the conditions during print lamination processing, which is applied to printed matter, for example.

■ The adhesive strength of the deposited film is strong and has excellent wear and friction resistance. Therefore, even if the vapor-deposited surface is exposed, it can be used sufficiently, and even if it is bonded to paper or other film with the vapor-deposited surface, sufficient bonding strength can be obtained.

[Method of measuring characteristics, evaluation criteria]

(1) Intrinsic viscosity The polymer part R and the homopolymer part H are fractionated by the column fractionation elution method described below, and the average intrinsic viscosity is measured. Intrinsic viscosity is measured as a 135°C tetralin solution. Column fractionation uses Keisoushi (Celite N, 535, manufactured by Wako Tsumugi Co., Ltd.) as a carrier and a mixed solvent of tetralin/ethylcarpitol as a developing solvent.

(a> 4 g of sample and stabilizer 2,6-di-t-butyl-
[p-Cresol 45C] was placed in a 2000 ml flask together with 800 ml of tetralin, heated under a nitrogen stream with stirring, and completely dissolved at 150°C. Next, 90 Cl of Celite was added, and the mixture was stirred at 150°C for 30 minutes.
The temperature shall be 110°C. Then similarly 0.167℃/min
The temperature is lowered to 90°C, and the temperature is further lowered to 50°C at a rate of 0.33°C/min.

(b> 500 m of the supported sample obtained in (a) above
After mixing well with ethyl caldotol from step 1, it is packed into a column. There are no particular limitations on the structure of the column, but a column with an inner diameter of 2 to 5 cm and a height of 1 to 2 m may be used, as long as the entire column can be held on the 170'CIX by some method. good. After filling the column, most of the tetralin is removed by flowing ethyl carpitol.

(C) Perform fractional elution of the loaded sample with a tetralin/ethylcarpitol mixed solvent. At this time, the column temperature is 170°C or higher, for example 175°C or 1000°C.
Fractional elution is performed by keeping the temperature at an accuracy of 175° C. and charging the mixed solvent after bringing it to 175° C. At this time, 80 ml of 2,6-di-t-butyl-p-cresol was added to 400 ml of the mixed solvent. The eluted polymer is separated by precipitation with a large amount of methanol.

Regarding the ratio of tetralin/ethylcarpitol mixed solvent, the appropriate ratio varies depending on the sample to be separated, but the polymer distilled with mixed solvent 400111+ is 0.
．． The tetralin/tetralin+ethylcarpitol volume ratio should be varied from 18% to 100% and fractionated into about 10-20 parts so that the ratio is 2-0.49.

<d) Measure the intrinsic viscosity and ethylene content of the n portions separated by the above operation.

The fractionated portion with an ethylene content of 0.5 to 15 wt% is defined as a random copolymer portion, and the fractionated portion with an ethylene content of aowt% or more is defined as a homopolymer portion. The intrinsic viscosity of the i-th fractionated portion is [η] 1 weight is Wl, the ethylene content of the i-th fractionated portion is ELi, and ELi is 0.5 to 15.
The fractionated portion that becomes wt% is from the jth to the next (j≦k),
Sort parts where ELj is aowt% or more from 1st to n
th (1≦n), [η]5, [ηdoor] are calculated by the following formula.

Measurement of ethylene content is by infrared absorption spectrum, NMR
Measured by a known method.

<2) Total light transmittance It was measured according to JIS-6714.

(3) Vapor-deposited film adhesion strength After laminating commercially available cellophane adhesive tape (manufactured by Chiban Co., Ltd.) to the vapor-deposited surface and peeling it off by 180 degrees, the adhesion area of the vapor-deposited metal was determined based on the 6 levels (index) in Table 1 below. evaluated.

(4) Glossiness <GS (60°) based on JIS-Z-8741 method 2
It means that the lower this value is, the better the matte effect is, and the higher this value is, the better the glossiness is.

(5) Blocking shear force width 3cm x length 10cm sample film to length 4cm
After stacking the samples over a period of time and leaving them in an atmosphere of 40° C. and 85% RH under a load of 3- for 5 days, the force required for shear peeling is measured using a tensile tester. A smaller number means less blocking.

(Example) Next, the present invention will be explained in detail based on examples.

Example 1 Consisting of a polymer part 1-124 wt% of 95 wt% ethylene and an ethylene-propylene random copolymer part R76*t% of 4.5 w, t% ethylene, the intrinsic viscosity [η]H of the polymer part H was 6. Odα10, the intrinsic viscosity (η) of the polymer part R is 1 oad u/g, the block index K is 1.40, the ethylene-propylene block copolymer with a total ethylene content of 26 wt% (melt index 3Q/10 min at 230 °C) was extruded into a sheet at 270°C, which was then wound around a cooling drum with a surface temperature of 40°C and cooled and solidified to obtain a 100μ unstretched film.This film was heated on one side of the film with an electrical energy amount of 15W-min/rn2. After corona discharge treatment, this film was placed in a vacuum deposition apparatus, and an aluminum deposited film having a thickness of 600 angstroms was deposited on the corona discharge treated surface.The properties of this film and the deposited film are shown in Table 2.

Example 2 A 400 μm unstretched film was prepared in the same manner as in Example 1, then stretched 4.5 times in the longitudinal direction while heating it to 115°C, and then led to a tenter and stretched at a stretching temperature of 135°C. The film was stretched 9 times in the width direction, then heat-treated at 130° C. while giving 5% relaxation in the width direction, and then slowly cooled to obtain a biaxially stretched film with a thickness of 9 μm. This film was subjected to corona discharge treatment and then vapor deposited in the same manner as in Example 1. Table 2 shows the properties of this film and the deposited film.

Example 3 The propylene-ethylene block copolymer of Example 1 was extruded into 11t(1) and commercially available polypropylene (230°C
(melt index 2Q/10 minutes, isotactic degree 97.3%) were respectively supplied to extrusion 1(n), and melt coextruded into a sheet at 270°C using a two-layer die,
This was wound around a cooling drum with a surface temperature of 40°C and cooled and solidified. While heating this sheet to 135° C., it was stretched 4.5 times in the longitudinal direction.

Furthermore, it was guided into a tenter and stretched 9 times in the width direction at 419160°C, and then 1
It was heat treated at 60°C and slowly cooled to form a film with a thickness of 10 μm (polypropylene base layer 8 μm, copolymer layer 2 μm).

The surface of the film block copolymer layer was then subjected to corona discharge treatment with an electrical energy amount of 15 W-min/Tl+2. These films were placed in a vacuum deposition apparatus, and an aluminum deposited film having a thickness of 600 angstroms was deposited on the corona discharge treated surface.

The characteristics of this film and the deposited film are shown in Table 2.

Example 4 Extrusion 1 of Example 3! The raw material for (1) is 95 wt% ethylene.
It consists of a polymer part H of 17 wt% and an ethylene-butene-1 random copolymer part R of 83 wt% of ethylene, and the intrinsic viscosity Cη]h of the polymer part H is 4.7 dl.
/g, the intrinsic viscosity [η]R of the polymer part R is 2.5C)1
Ethylene-butene-1 block copolymer with a block index K of 1.35 at 1/Q and a total ethylene content of 19 wt% (melt index 4Q/10 min at 230'C)
A laminated film and a vapor-deposited film were obtained in the same manner as in Example 3 except for the following steps. These properties are shown in Table 2.

Comparative Example 1 The raw materials for the extruder (I) of Example 3 were a polymer part H of 95 wt% ethylene, 8 wt%, and an ethylene part of 2 wt% ethylene.
The propylene random copolymer part R consists of 92wt%, and the intrinsic viscosity [η)Ll of the polymer part H is 2, Od
o, / Q, intrinsic viscosity of polymer part R [η target is 2.2d
0/g, block index K of 0.5, and total ethylene content of 10 wt% ethylene-propylene block copolymer (melt index 4Q/10 min at 230 °C)
A laminated film and a vapor-deposited film were obtained in the same manner as in Example 3 except for the following steps. These properties are shown in Table 2.

Comparative Example 2 The raw materials of extrusion 1 (I) of Example 3 were used as a polymer part 1-135 wt% containing 93 wt% ethylene and an ethylene-propylene random copolymer part R65 wt% containing 4 wt'% ethylene.
%, and the intrinsic viscosity of the polymer part H [η] is 13
dff/q, the intrinsic viscosity [η]1 of the polymer part R is 1.5
Same as Example 3 except that the block index K was 1.2 and the total ethylene content was 35 wt% ethylene-propylene block polymer (melt index 2 g/10 min at 230°C). A laminated film and a vapor deposited film were obtained.The properties thereof are shown in Table 2.

As is clear from Table 2, the ethylene-
The film having the α-olefin block copolymer layer had excellent matting properties and adhesion strength of the deposited film, whether it was a single layer or a laminated film, and whether it was an unstretched film or a stretched film. However, if the difference in the intrinsic viscosity between polymer part R and polymer part 1 becomes negative, the matting properties deteriorate (Comparative Example 1).
), when the limiting viscosity of the polymer portion H exceeds 10 and the difference from the limiting viscosity of the polymer portion R exceeds 9.8, the surface roughness becomes too large and unevenness occurs. In addition, fish eyes were formed, resulting in a film with many surface defects. (Comparative Example 2) Example 5 The same raw materials as in Example 3 were put into the extruders (1) and (II), and the ethylene-propylene random copolymer (230°C melt index 7.50/10 minutes) and melt-coextruded into a sheet at 270° C. using a three-layer die so that copolymer layers were laminated on both sides of the polypropylene layer. Thereafter, it was cooled and solidified in the same manner as in Example 3, and stretched vertically and horizontally to obtain a biaxially stretched film. Furthermore, both sides of the film were subjected to corona discharge treatment, and aluminum was metallized on the surface of the random copolymer layer. The non-deposited side of this vapor-deposited film (propylene-
A vinyl acetate-based emulsion type adhesive was applied to the surface of the ethylene block copolymer layer and bonded to card paper. The characteristics of this vapor-deposited film mount and laminated film are shown below.

Surface roughness Ra) Block copolymer layer surface 0.35μ Random copolymer layer surface 0.08μ Blocking shear force IOG gloss (deposited surface) 800 Deposited film adhesion strength Bonding strength with grade 5 paper Good This film has one smooth surface. The other side is a roughened film,
A vapor-deposited film and a laminated paper with excellent blocking resistance and a mirror-like metallic luster were obtained. Furthermore, the adhesion strength of the deposited film and the bonding strength with paper were also strong.

Example 6 M, I = 20/10 minutes of PP at 230°C was fed into one extruder, the top of the DSC melting peak was 130°C, 145
It is at 12 points of °C and H1/ (+-11+82) is 0.
Ethylene-propylene block copolymer ([η) polymerized to give 5 1. , l-7,0, [η]9-1.
5 was fed to another extruder, and was melt-coextruded at 280°C and wound around a cooling drum at 50°C to obtain an unstretched sheet of about 670μ (basic PP about 570μ).

This sheet was stretched 4 times in the longitudinal direction while heating it to 120°C, and then introduced into a tenter at 170°C and stretched 9 times in the transverse direction to give a relaxation rate of 7%.
A laminated film of 17μ) was obtained. The film properties are as follows.

Total light transmittance 93% Glossiness 11 Destruction resistance 0 Vapor deposited film adhesion strength Grade 5 A laminated film of polymer layers with the characteristics of the melting peak shown in Example 6 has a low glossiness due to diffuse reflection on the surface. The resulting film has excellent matte properties and high total light transmittance, making it ideal as a print laminating film to be laminated to printed matter. In addition, because the melting peak is on the high temperature side, it maintains a matte property with excellent resistance to fading, and is used for lamination applications that require heating and pressure (print lamination).
) etc. was found to be excellent.

The adhesive strength of the deposited film was also excellent.

[Brief explanation of drawings]

FIG. 1 and FIG. 2 are explanatory diagrams each showing an outline of a melting spectrum measured by a differential scanning calorimeter. Pl: First (low temperature side) melting peak 2: Second (high temperature side) melting peak A: Vertex of the first melting peak B: Vertex of the second melting peak C: Base line D: First melting peak Starting point Tm +: Temperature at point Δ Tm2: Temperature at point 8 Hl: Heat of fusion at Pl 1'2: Heat of fusion at P2 Patent applicant Azuma Co., Ltd. ) TM 1 'r-, 2 Temperature T ('C) Procedural amendment Manabu Shiga Director General of the Patent Office 1, Indication of the case - Patent Application No. 123819 of 1981 2, Name of the invention Roughened film 3, Amendment Relationship with the case of a person making a patent application Patent applicant address: 5, 2-2 Muromachi, Nihonbashi, Chuo-ku, Tokyo, Japan; number of inventions will not increase due to the amendment; 6; column of "Detailed description of the invention" in the specification to be amended ( 1) Specification, page 16, line 13 [Transverse stretching temperature: 150 to 165°C] to "Transverse stretching temperature: 125 to 150°C in the case of a single layer film, 150 to 165°C in the case of a laminated film" and correct it. (2) Same page 16, line 16, F co-extrusion method J is corrected as “co-extrusion method J.” (3) Same page 17, line 1 ?
ii1'l: Do. (4) In the second line of page 17, ``to printed matter'' has been amended to ``to printed matter.'' (5) Same page 17, line 5 [Contin J for insulating oil impregnation for use or adhesive tape]
and correct it. (6) Amend the same page 17, line 11 [to usage] to "Usage U". (7) Correct rELjj on page 20, line 18 to rELi J.

Claims (1)

[Claims] (1) A roughened film consisting of a polymer mainly consisting of a polymer part H and a polymer part R, wherein the polymer part H
has an ethylene component of 80 wt% or more, the polymer part R is formed by random copolymerization of at least one of propylene and butene-1 and ethylene, and the intrinsic viscosity [η]_H of the polymer part H and the polymer part Intrinsic viscosity of R [η
]_R difference ([η]_H - [η]_R) is 0 to 9.8
A roughened film having dl/g and [η]_H of 1.5 to 10 dl/g.