JP2000191029A - Packaging film and manufacture thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a packaging film wherein stacked bags may not come out and rustles of the bags are not offensive to ears when the bags are stacked for automatic fill-packaging. SOLUTION: The packaging film has a surface layer made of an ethylene- based resin film which exhibits physical property wherein surface roughness (JIS B-0611) is such that center plane average roughness is Sra 1.3 to 6.0 μm and ten point height of irregularities is SRz 15 to 40 μm while a coefficient of static friction between longitudinal directions of the surface layer is 0.35 to 0.80, a coefficient of dynamic friction between the longitudinal directions is 0.30 to 0.75, and difference between the coefficients of static and dynamic friction between the same directions is 0.05 or more, and the film has a silicon resin coat layer on a rear face.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a packaged article having an adhesive layer, such as a disposable napkin, a bandage tape wound on a paper tube, a medical adhesive tape wound on a paper tube, a milk pad, a false whisker and the like. And a packaging film suitable for packaging.

[0002]

2. Description of the Related Art As shown in FIG. 5, individual packaging of disposable napkins is carried out on a back surface of an adhesive layer 2a provided on a back surface of a disposable napkin 2 to be packaged.
silicone resin copolymer to the surface of woodfree paper having m ² - encountered a release paper 2
b, is folded in three with the release paper on the outside, and the ethylene resin film 1 is folded in three and wrapped, and both ends 1a and 1c of the film are heat-sealed or cold-sealed. The central overlapping portion 1b is adhered with an adhesive to form a bag 3, the packaged object 2 is stored, and an adhesive tape T for facilitating opening is attached on the central overlapping portion 1b for packaging. Forming the body.

[0003] The packaging film material is designed to reduce the sound of squeaking when the bags are rubbed with each other as low as possible so as not to be unpleasant, to give the bags a soft feeling, and to use a heat seal. Surface layer (A) based on a mixture of linear linear polyethylene and high-pressure low-density polyethylene or a mixture of linear linear polyethylene and high-pressure legal density polyethylene and high-density polyethylene for the purpose of facilitation, and linear linear polyethylene alone Or a mixture of linear linear polyethylene and high-pressure low-density polyethylene,
Or linear linear polyethylene and high-pressure low-density polyethylene and ethylene-vinyl acetate copolymer or ethylene
A two-layer structure film having a thickness of 15 to 40 μm and comprising a heat seal inner layer (B) made of a mixture of acrylic acid copolymers is mainly used.

[0004] A package 3 in which sanitary napkins 2 are individually stored.
Are stored in a corrugated ball box in line with the 500th rank, and are distributed as a free sample on the street or distributed on the street for advertisement. In addition, it is stored in a larger outer bag in units of 10, 20, or 40 bags, and this is sold at a store such as a pharmacy or a supermarket. When distributing on the street, the distributor holds about 10 bags in one hand and hands one or two bags to the passerby. In this case, if the grip strength of the finger is not sufficient, the bag in the center of the 10 bags sandwiched between the fingers may slide out and fall from the hand to the road. Therefore, the surface of an ethylene-based resin film having a Beck index (JIS P-8119) of 9,000 to 20,000 seconds is solid printed with a gravure printing ink containing silica fine powder, and the surface has a Beck index of 400 to 900 seconds. The surface is roughened to increase the coefficient of friction to prevent such protrusion.

[0005]

The ethylene-based resin packaging film having such a solid print on the surface requires post-printing processing after the production of the packaging film, which increases the unit price of the bag. In addition, since the release paper 2b is used, when the used sanitary napkin is wrapped in the packaging film and discarded, the release paper is also wrapped in the film, so that a squeaking sound is generated. To shy,
Especially when replacing with a new napkin in the toilet, the flush toilet flushes the water so that the squeaky sound is hard to hear outside. Therefore, excess water will be used.

[0006] Furthermore, 300 to 350 bags 3 containing disposable sanitary napkins are produced per minute, and individually packed bags 3 are automatically filled with a roller conveyor 4 as shown in FIG. When 20 bags are placed on the rotary plate 6 having the stopper plate, the partition plates 7 rise from below and collect in units of 20 bags, and the rotary plate 6 and the partition plate 7 are motored together with the motor M. , The push plate 8 is advanced to push out the 20-unit bag into a pair of guide plates 9 and 9 (referred to as stacking), the push plate 8 is retracted and raised, and the rotating plate 6 is again rotated. Is rotated 90 degrees in the opposite direction, and the partition plate 7 is air-
After being lowered by the cylinder, 20 bags are placed on the rotating plate 6 and the partition plate 7 is raised from below to accumulate in units of 20 bags.
After rotating the rotary plate 6 again by 90 degrees, the push plate 8 is advanced to push out the 20-unit bag into the pair of guide plates 9, 9, and the outer bag 10 containing 40 sets of these two rows of aggregates. Push plate 8
And filling the outer bag with a heating port-11,1
Heat seal 12 and automatic filling and packing (the number of stacking and filling is about 8 per minute).
Times).

However, at the time of this stacking, as shown in FIG. 4, the bag 3a at the central portion, which does not sometimes touch the guide plate, sometimes jumps forward or upward, disturbs the rows, and fails to fill and pack. The observer needed to take out the outer bag that failed to fill and the bag that had popped out of the automatic filling and packaging machine. An object of the present invention is to provide a packaging film that does not require a release paper. The present invention also provides
An object of the present invention is to provide a packaging film in which a bag does not pop out even in a stacking operation in which one line has 20 bags or more. Another object of the present invention is to provide a packaging film which has a very small rubbing sound and which can be cold-sealed for easy removal of stored items.

[0008]

According to the first aspect of the present invention, the surface roughness (JIS B-0601) is set such that the center plane average roughness S
Ra 1.3 to 6.0 μm, ten-point average roughness SRz 15
４０40 μm, the surface layer has a coefficient of static friction in the longitudinal direction of 0.35 to 0.80, the coefficient of kinetic friction in the longitudinal direction is 0.30 to 0.75, and a coefficient of static friction in the same direction. An object of the present invention is to provide a packaging film having a silicone resin coat layer on a front surface and a back surface made of an ethylene resin film having a difference in dynamic friction coefficient of 0.05 or more. With this configuration, when stacking,
Since the air escapes between the bags quickly, the bags are prevented from jumping out. Also, no release paper is required.

According to a second aspect of the present invention, the surface layer of the packaging film has a Beck index (JIS P-8119) of 80.
The present invention provides a packaging film that lasts up to 300 seconds. Since the air escapes between the bags quickly, the bags are prevented from jumping out. Claim 3 of the present invention is that the surface layer of the packaging film has a coefficient of static friction between the surface layers in the longitudinal direction of 0.40 to 0.40.
0.80, and the dynamic friction coefficient between the longitudinal directions is 0.30
0.70, and the difference between the static friction coefficient and the dynamic friction coefficient in the same direction is 0.1 or more. By making the difference between the coefficient of static friction and the coefficient of dynamic friction 0.1 or more,
Automatic filling and packaging of individual packages in units of 40 units became possible.

According to a fourth aspect of the present invention, the surface layer of the packaging film has a center plane peak height SRd of 5 to 20 μm, a center plane trough depth SRv of 7 to 20 μm, and a center plane roughness SGr of 60 to 60 μm.
An object of the present invention is to provide a packaging film having physical properties of 100 DOT. Since the air escapes between the bags quickly, the bags are prevented from jumping out. Claim 5 of the present invention provides a packaging film,
The basis weight is 12 to 80 g / m ² , and the surface layer comprises (a) 30 to 85% by weight of a linear low density polyethylene having a density of 0.880 to 0.935 g / cm ³ , and (b) a density of 0.900 to 0.95 g / cm ^3.
0.935 g / cm ³ high pressure method low density polyethylene 5
(C) low density polyethylene having a density of 0.880 to 0.935 g / cm ³ obtained by polymerization using a metallocene catalyst 0 to 30% by weight, (d) density 0.945 to
0.970 g / cm ³ high density polyethylene 0-60
100% by weight of an ethylene-based resin having a composition of
Inorganic fine powder having an average particle size of 0.1 to 20 μm is 1 to 10
The present invention is based on an ethylene resin composition blended at a ratio of 0 parts by weight, and provides a packaging film having a silicone resin coat layer on the back surface. By using the ethylene-based resin, the texture of the packaging film is good. Also, the rubbing sound is low.

According to a sixth aspect of the present invention, the packaging film has a density of 0.880 to 0.8 obtained by polymerization using a surface layer (A) of an ethylene-based resin composition and a metallocene catalyst.
935 g / cm ³ low density polyethylene 30-100
Weight percent and a linear linear polyethylene having a density of 0.880 to 0.935 g / cm ³ , a silicone resin coat layer on the inner surface of a laminated film having at least an inner layer (B) of an ethylene resin containing 70 to 0% by weight. Is provided. By adopting a laminated structure, the moldability of the film is improved.

According to a seventh aspect of the present invention, there is provided a packaging film,
(A) 30 to 85% by weight of linear low-density polyethylene having a density of 0.880 to 0.935 g / cm ³ , (b) high-pressure low-density polyethylene having a density of 0.900 to 0.935 g / cm ³ 5 to 40 % By weight, (c) a density of 0.880 to 0.935 g / cm obtained by polymerization using a metallocene catalyst
Low density polyethylene 0-30 wt% of ^3, relative to 100 parts by weight of ethylene-based resin of high-density polyethylene 0-60 wt% of the composition of (d) Density 0.945~0.970g / cm ^3, average particle size Surface layer (A) of ethylene-based resin composition containing 0.1 to 20 parts by weight of inorganic fine powder of 0.1 to 20 μm, (a ′) density 0.880 to
0.935 g / cm ³ linear low density polyethylene 3
0 to 80% by weight and (b) a density of 0.900 to 0.9
35 g / cm ³ high-pressure low-density polyethylene, density 0.880 to 0.93 obtained by polymerization using metallocene catalyst
5 g / cm ³ low density polyethylene and density 0.94
Resin selected from high-density polyethylene of 5 to 0.970 g / cm ³ 70 to 20% by weight of ethylene-based resin having a composition of 70 to 20% by weight, based on 100 parts by weight of inorganic fine powder having an average particle size of 0.1 to 20 μm, An intermediate layer (C) of an ethylene-based resin composition mixed at a ratio of 50 parts by weight, and a density of 0.880 to 0.93 obtained by polymerization using a metallocene catalyst.
100 parts by weight of ethylene-based resin containing a straight chain linear polyethylene 70-0 wt% of low density polyethylene 30 to 100 wt% and a density 0.880~0.935g / cm ³ of 5 g / cm ³ to an average particle size Is 0.1-20μ
A / C / B having an inner layer (B) of an ethylene-based resin composition containing 0 to 50 parts by weight of an inorganic fine powder of m
A packaging film provided with a silicone resin coating layer (D) on the inner surface of a three-layer film having a structure,

The basis weight is 12 to 80 g / m ² , the thickness of the surface layer (A) and the inner layer (C) is 1 to 30 μm, and the surface layer has a Beck index (JIS P-8119) of 80.
Surface roughness (JIS B-0601): center plane average roughness SRa 1.3 to 6.0 μm, ten-point average roughness SRz 15 to 40 μm, center plane height SRd 5 to 5 seconds
A surface layer having a center plane valley depth SRv of 7 to 20 μm and a center plane roughness SGr of 60 to 100 DOT,

The coefficient of static friction between the surface layers is in the longitudinal direction (M
D) 0.35-0.80, transverse direction (TD) 0.40
0.80, and the dynamic friction coefficient between the surface layers is in the longitudinal direction (M
D) 0.30 to 0.75, lateral (TD) 0.35
0.75, which provides a packaging film having physical properties in which the difference between the static friction coefficient and the dynamic friction coefficient in the same direction is 0.05 or more. By adopting a laminated structure, not only the film formability is improved, but also the film cost can be reduced.

In the present invention, a porous zeolite having an average particle diameter of 1 to 8 μm is used as the inorganic fine powder used for the surface layer (A) or the inner layer (B) of the packaging film. By using a porous zeolite, drying of the silicone resin layer can be accelerated. Claim 9 of the present invention
Means that the packaging film has a basis weight of 20 to 40 g / m ² and a tensile modulus (JIS K-7127) of 200 to 2,000.
kg / cm ² . With such physical properties, the cost is reduced and the texture of the packaging film is improved.

A tenth aspect of the present invention is to provide an ethylene-based resin film melt-extruded from a T-die having a particle size of 2 to 30 μm.
20 to 70% by weight of inorganic fine particles having a particle size of 40 to 300 μm (the difference between the two being at least 30 μm or more) at a weight ratio of 1: 0.3 to 1:10, The rubber roll is obtained by embossing using a rubber roll containing 80 to 30% by weight and a metal chill roll, then coating the back surface with a silicone resin, and then drying it. The surface layer of the film in contact with the film has a Beck index (JIS P-8119) of 80 to 300.
Second, surface roughness (JIS B-0601) is center plane average roughness SRa 1.3 to 6.0 μm, ten point average roughness SRz
It is a surface layer showing physical properties of 15 to 40 μm, the longitudinal static friction coefficient between the surface layers is 0.35 to 0.80, the longitudinal dynamic friction coefficient between the surface layers is 0.30 to 0.75, An object of the present invention is to provide a method for producing a packaging film having physical properties wherein the difference between the static friction coefficient and the dynamic friction coefficient in the same direction is 0.05 or more. By embossing the ethylene-based resin film using a rubber roll containing particles having different particle sizes, the film surface can be roughened, the texture can be improved, and the decibel of the rubbing noise can be reduced. Make automatic filling and packaging good. An eleventh aspect of the present invention is characterized in that, in the above-mentioned manufacturing method, the surface layer is subjected to an oxidation treatment such as a corona discharge treatment, a plasma treatment, and a glow discharge treatment before the ethylene resin film is coated with the silicon resin. By performing such an oxidation treatment, fine pores are formed on the film surface, and the absorption of the uncured (uncrosslinked) silicone resin varnish into the film is accelerated, and adheres to the top of the embossed mountain of the silicone resin surface layer. The amount of varnish to be reduced can be reduced, and a decrease in the coefficient of friction is prevented.

A twelfth aspect of the present invention is to provide a packaged article having an adhesive layer, such as a sanitary napkin, by using the packaging film of the present invention to form a silicone resin coat layer on the inner side in contact with the packaged article. By packaging so that the layer is on the outside, the obtained package does not require a release paper, so the decibel of the rubbing noise between the packages is low, and the used sanitary napkin is wrapped in the packaging film. The decibels of the generated sound are also small, so women do not need to worry.

[0018]

The physical properties of the surface layer of the packaging film are as described above, so that the bag is prevented from popping out during stacking, and the film material and the layer configuration are as described above, so that the skin feels good and cold sealing is achieved. A heat-sealable packaging film can be manufactured, and a release paper is not required when packaging an article having an adhesive layer.

[0019]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail. Production of packaging film: In the packaging film of the present invention, the surface layer (A) outside the bag 3 has a Beck index (JIS P-8).
119) is from 80 to 300 seconds, preferably from 100 to 200 seconds.
Second, the surface roughness (JIS B-0601) is the center plane average roughness SRa 1.3 to 6.0 μm, preferably 2.0 to 2.0 μm.
3.0 μm, ten-point average roughness SRz 15 to 40 μm, preferably 15 to 30 μm, longitudinal direction (MD) between surface layers
Has a static friction coefficient (JIS K-7125) of 0.35
0.80, preferably 0.40 to 0.75, more preferably 0.45 to 0.70, and the longitudinal dynamic friction coefficient (JIS K-7125) between the surface layers is 0.30 to 0.
75, preferably 0.35 to 0.70, more preferably 0.35 to 0.60, and the difference between the static friction coefficient and the dynamic friction coefficient in the same direction is 0.05 or more, preferably 0.1 to 0.70.
It is a packaging film having physical properties of 07 or more, more preferably 0.1 or more.

Further, this material has a surface roughness (JIS B-
0601), the center plane peak height SRd is 5 to 20 μm.
m, preferably 7 to 12 μm, center plane valley depth SRv 7
A packaging film having a surface layer having a center surface roughness of SGr of 60 to 100 DOT is preferred. As shown in FIG. 1, a thermoplastic resin film 102 is melt-extruded from a T-die 101 as shown in FIG. 1, and while this film is kept in a molten state, inorganic fine particles having a particle size of 5 to 40 μm and particles having a particle size of 110 ~ 220 µm fine particles at 1: 0.
Embossing is performed using a rubber roll 103 and a metal chill roll 104 containing 25 to 55% by weight in a weight ratio of 3 to 1: 5, and if necessary, corona discharge treatment, plasma treatment, plasma / flame treatment on both surfaces of the film, An oxidation treatment 105 such as a glow discharge treatment and an ozone treatment is performed, and then a silicone resin coating liquid (varnish) 106 is coated on the film surface in contact with the rubber roll, and this is heated and heated with hot air. It is manufactured by forming a silicone resin layer (D) by drying with a dryer 107 such as.

It is preferable to use a metal roll in which an embossed pattern with a wire number of 50 to 200 is engraved on the surface of the metal chill roll in order to further improve the soft feeling (texture) of the film. The sculpture pattern may be any of a lattice pattern, a crest (pear-skinned) pattern, a trapezoidal pattern, and a silk pattern. The oxidation treatment activates the surface of the film to improve the adhesiveness with the silicone resin or improve the adhesiveness of the printing ink in the post-processing. Also, extremely fine holes are formed on the film surface to accelerate the absorption of the uncured varnish (2% by weight or less) to the inner surface of the film, and to reduce the amount of varnish adhering to the embossed peaks of the film surface layer. And prevent the dynamic friction coefficient and the static friction coefficient from decreasing.

The drying of the silicone resin coating solution should be sufficiently performed. If there is an undried (2% or less) component, a part of the undried coating liquid transfers to the film surface layer (A) when the film is wound up, and the desired static friction coefficient and dynamic friction coefficient are not achieved. There is also. Therefore, before the silicone resin coating solution is coated, the zeolite, silica, calcium carbonate, divinylbenzene cross-linked polystyrene and the like have a pore diameter of 1 to 2000 angstroms, preferably 1 to 10 angstroms on the film surface layer. It is advisable to mix the porous powder of the above and promote the absorption of the coating liquid by oxidizing the film surface layer, and to minimize the adhesion area of the silicone resin to the embossed peak of the surface layer A as much as possible. . Also, before winding the film for packaging into a winding machine, a paste, flour, zinc white etc. 108 is adhered to the inner layer of the film to absorb the undried silicon resin coating liquid and not transfer to the surface layer. Is also good. The silicone resin coating liquid is used in an amount of 0.1 to 5 g / m ² in terms of dry solid content.

Film material: As the thermoplastic resin of the film material, a high-pressure low-density polyethylene, a linear linear low-density polyethylene, a low-density polyethylene obtained by polymerization using a Kaminski catalyst, and a metallocene catalyst are used. Low-density polyethylene obtained by polymerization, high-density polyethylene, propylene homopolymer, ethylene-propylene copolymer, ethylene-propylene-butene-1 copolymer,
A propylene / butene-1 copolymer, a propylene / 4-methylpentene-1 copolymer, a mixture thereof and the like can be used.

Among them, in order to exhibit the physical properties of the surface layer (A) and to impart a soft feeling to the film, the composition of the surface layer must be (a) a linear film having a density of 0.880 to 0.935 g / cm ^3. Low-density polyethylene 30 to 85% by weight, preferably 45 to 75% by weight, (b) density 0.900 to 0.9
High pressure method low density polyethylene of 35 g / cm ³ 5-40
%, Preferably 10 to 20% by weight, (c) a density of 0.880 to 0.93 obtained by polymerization using a metallocene catalyst.
5 g / cm ³ low density polyethylene 0 to 30% by weight,
Preferably 5 to 20% by weight, (d) density 0.945 to
0.970 g / cm ³ high density polyethylene 0-60
% By weight, preferably 100 parts by weight of an ethylene resin having a composition of 0 to 15% by weight, having an average particle size of 0.1 to 20 μm.
m of inorganic fine powder is 5 to 100% by weight, preferably 5 to 100% by weight.
An ethylene-based resin composition blended in a proportion of 50 parts by weight is preferred.

This composition has a melting point of 3% from the melting point of the film material.
A single layer film may be used if heat sealing is performed at a temperature higher by 0 to 100 degrees, but a sealing surface is formed if a cold seal can be performed at a temperature near the melting point of the film material. A laminated film having a two-layer structure or more in which inner layers are laminated is preferable. As the material of the inner layer (B), the density obtained by polymerization using a metallocene catalyst is 0.880 to 0.880.
0.935 g / cm ³ low density polyethylene 30-1
Ethylene resins containing 70% to 0%, preferably 40% to 0% by weight of a linear linear polyethylene having 00% by weight, preferably 60 to 100% by weight and a density of 0.880 to 0.935 g / cm ³ are preferred.

A density of 0.880 to 0.935 g / cm obtained by polymerization using a metallocene catalyst as a material for the inner layer.
^When low-density polyethylene ( ³⁾ is used as the main component,
Open the sealed bag with a small force (10-100 g / cm
Width). It also makes the bag feel soft. The packaging film may have an intermediate layer (C) between the surface layer (A) and the inner layer (B). By forming such an intermediate layer, the formation of a laminated film can be facilitated, and special functions such as coloring, gas barrier properties, and antistatic properties can be imparted to the film.

From the viewpoint of soft feeling, (a) density 0.88
0 to 0.935 g / cm ³ linear low density polyethylene 30 to 85% by weight, preferably 45 to 75% by weight,
(B) High-pressure low-density polyethylene having a density of 0.900 to 0.935 g / cm ³ , 5 to 40% by weight, preferably 10
(C) low density polyethylene having a density of 0.880 to 0.935 g / cm ³ obtained by polymerization using a metallocene catalyst 0 to 30% by weight, preferably 5 to 20% by weight, (d) High density polyethylene having a density of 0.945 to 0.970 g / cm ³ 0 to 60% by weight, preferably 1 to 1
The inorganic fine powder having an average particle diameter of 0.1 to 20 μm is 5 to 100 parts by weight of an ethylene resin having a composition of 5% by weight.
100 parts by weight, the surface layer of preferably an ethylene-based resin composition which is blended in an amount of 5 to 50 parts by weight (A), (a ') a density 0.880~0.935g / cm ³ linear low-density polyethylene 30 to 80% by weight, preferably 45 to 80%
% And (b) a density of 0.900 to 0.935 g /
high-pressure low density polyethylene cm ^3, a density obtained by polymerization using a metallocene catalyst 0.880~0.935g / c
low density polyethylene and a density from 0.945 to 0 in m ^3.
Resin selected from high-density polyethylene of 970 g / cm ³ 70 to 20% by weight, preferably 55 to 20% by weight of an ethylene resin having a composition of 100 parts by weight, inorganic fine particles having an average particle size of 0.1 to 20 μm. An intermediate layer (C) of an ethylene-based resin composition in which powder is blended at a ratio of 0 to 50 parts by weight, and a density of 0.880 to 0.935 g / cm ³ obtained by polymerization using a metallocene catalyst. Low density polyethylene 30 to 100% by weight, preferably 60 to 1
00% by weight and density 0.880-0.935 g / cm
³ is a three-layer film having an A / C / B structure having an inner layer (B) of an ethylene-based resin containing 70 to 0% by weight, preferably 40 to 0% by weight, having a basis weight of 12 ８０80 g / m ² , preferably 20-40
g / m ² , the thickness ratio of the intermediate layer (c) occupying 40% to 90%, preferably 40% to 80%, of the total thickness of the film,
The thickness of the surface layer (A) and the inner layer (B) is 1 to 30 μm
m, preferably a laminated film of 2 to 8 μm.

As linear linear polyethylene, Zigra
Ethylene / butene-1 copolymer, ethylene / hexene-1 copolymer, ethylene / heptene-1 copolymer, ethylene / octene-1 obtained by polymerizing ethylene and α-olefin using a catalyst or a Kaminski catalyst And copolymers of ethylene, butene-1 and hexene-1. Such linear linear polyethylene is a Novatec LL grade from Nippon Polychem Co., Ltd., an Ultrazex grade from Mitsui Chemicals, Inc., a Dowlex grade from Dow USA, and a Nihon Unicar ( Co., Ltd. under the trade name of Nakflex, and it is preferable to use these film grades.

A method for producing polyethylene by polymerizing ethylene and an α-olefin using a metallocene catalyst is as follows.
As described in International Patent Publication WO92 / 01723, a catalyst comprising a metallocene compound and a compound which reacts with the metallocene compound to form a stable anion is used. -Copolymerization with 2 to 60% by weight of olefin. As the catalyst, a metallocene-alumoxane catalyst is particularly preferable. As metallocene compounds,

[0030]

MLx (where M is Zr, Ti, Hf, Nb, Ta and Cr
L is a ligand coordinated to the transition metal, at least one ligand having a cyclopentadienyl skeleton, and a ligand other than the cyclopentadienyl skeleton. The ligand L is a hydrocarbon group having 1 to 12 carbon atoms, an alkoxy group, an aryloxy group, a trialkylsilyl group, a SO ₃ R group, a halogen atom or a hydrogen atom, and x is a valence of a transition metal. . The compound which becomes a stable anion by reacting with the metallocene compound is an ionic compound or an electrophilic compound formed from an ion pair of a cation and an anion,

[0031]

Embedded image [Q] ^{m +} [Y] ^m− (wherein Q is a cation component of an ionic compound, and examples thereof include a carbonium cation, a tropylium cation, an ammonium cation, a sulfonium cation, and a phosphonium cation. And Y are anionic components of an ionic compound, such as an organic boron compound anion, an organic aluminum compound anion, an organic gallium compound anion, an organic phosphorus compound anion, an organic arsenic compound anion, and an organic antimony compound anion.

The α-olefin having 3 to 18 carbon atoms includes propylene, butene-1, pentene-1, hexene-1, octene-1, 4-methylpentene-1,4,4
Dimethylpentene-1, octadecene and the like are used. Such low-density polyethylene is a kernel grade from Nippon Polychem Co., Ltd., an evolve grade from Mitsui Chemicals, Inc., and an Escor grade from Exxon, USA.
It is sold in the grade of ren, and it is preferred to use these film grades.

The high-pressure low-density polyethylene has a reaction temperature of 2
A branched polyethylene obtained by copolymerizing ethylene alone or ethylene and an α-olefin at a temperature of 20 ° C. or more and a pressure of 800 to 1,700 kg / cm ^{2. The} polyethylene is a Novatec LD grade from Nippon Polychem Co., Ltd. -Mirax grade from Mitsui Chemicals, Inc.
These film grades are preferably used. The high-density polyethylene is sold under the grade of Novatec HD by Nippon Polychem Co., Ltd., under the grade of Hizex by Mitsui Chemicals, Inc., and under the grade of JALEX HD by Nippon Polyolefin Co., Ltd. It is preferable to use these film grades.

The average particle size used for the surface layer and the intermediate layer is 0.
As the inorganic fine powder of 1 to 20 μm, preferably 3 to 12 μm, calcium carbonate, silica, zeolite, calcined clay, vermiculite, talc, mica, alumina, titanium oxide, zinc oxide and the like are used. Preferably, the surface layer has an average particle size of 1 to 8 μm and a pore size of 1 to 200 μm.
It is preferred to use 0 Angstrom porous zeolites, silica and calcium carbonate. In addition to the resin and the inorganic fine powder component, a surfactant, a dispersing aid, an antistatic agent, a heat stabilizer, a lubricant and the like which are usually added may be added at a ratio of 0.05 to 1% by weight.

The inorganic fine particles having a particle size of 2 to 30 μm, preferably 2 to 10 μm, to be incorporated into the rubber roll used for embossing include silica, zeolite, calcined clay, vermiculite, talc, mica and alumina. No. Particle size of 40-300 μm, preferably 110
Examples of the fine particles having a diameter of up to 220 μm include pulverized thermosetting resins such as alumina, talc, phenol resin and melamine resin. As the rubber component of the rubber roll, silicone rubber, crosslinked isoprene rubber, crosslinked butylene / isoprene copolymer rubber, or the like is used.

The temperature of the metal chill roll during film formation is 5 to 60 ° C., preferably 10 to 40 ° C. The linear pressure of the film is 0.2 to 30 kg / cm.
The resulting film has the above-mentioned coefficient of static friction, coefficient of dynamic friction, Beck index, and surface roughness. In addition, the tensile modulus (JIS
K-7127) is a film having a basis weight of 12 to 40 g / m ^{2 and} a weight of 200 to 2000 g / cm ² . The packaging film of the present invention is not limited to sanitary napkins,
Conventionally, even in products that have been sold by being inserted into a paper box, such as a bandage tape having a release paper attached to an adhesive portion, a milk pad, and a medicated adhesive tape, the packaging film of the present invention is used instead of the paper box. Used and can be individually wrapped without release paper.

[0037]

The present invention will be described in more detail with reference to the following examples. Example 1 The following resin composition for a surface layer (A): (a) a linear low-density polyethylene (ethylene-butene-1 copolymer) having a density of 0.914 g / cm ³ polymerized using a Ziegler catalyst; 68 parts by weight, (b) 17 parts by weight of high-pressure low-density polyethylene having a density of 0.900 g / cm ³ , (c) metallocene {complex ethylene-bis (4.5.6.7-tetrahydroindenyl) zirconium dichloride} 10 parts by weight of polyethylene having a density of 0.912 g / cm ³ (ethylene-hexene-1 copolymer: hexene content: 22% by weight) obtained by polymerization using a methylalumoxane catalyst; (d) density: 0.945 high-density polyethylene 5 parts by weight of ~0.970g / cm ^3, (e) an average particle size of 8 [mu] m, zeolite 7 parts by weight of the pore diameter 9 Å, (f) anti-static agents 0. Parts intermediate between the resin composition for the following (C): (a) Chigura - linear low density polyethylene 84 parts by weight of a density 0.914 g / cm ³ obtained by polymerization using the catalyst, (c) metallocene alumoxane 16 parts by weight of polyethylene having a density of 0.912 g / cm ³ obtained by polymerization using a catalyst; (e) 7 parts by weight of calcium carbonate having an average particle diameter of 3 μm; (f) 0.5 parts by weight of an antistatic agent; Resin for inner layer (B): (a ′) 100 parts by weight of polyethylene having a density of 0.914 g / cm ³ obtained by polymerization using a metallocene-alumoxane catalyst.

The above resins were melt-kneaded at 260 ° C. using separate extruders, fed to one co-extrusion T-die, laminated in an A / C / B layer in the die, Layer film (thickness 25 μm: A layer / C layer / B layer = 5/15 /
5 μm), and then embossing roll (rubber roll: 30 parts by weight of alumina particles having a particle diameter of 15 μm, alumina particles 30 having a particle diameter of 110 μm) provided 25 cm below the die.
Parts by weight, 40 parts by weight of silicone rubber. Metal chill roll: silk sculpture with wire number 110, temperature 35 degrees) and rubber roll on layer A side
And a line pressure of 8 k so that the layer B side is in contact with the metal chill roll.
g / cm and embossed on both sides of the film.
A corona discharge treatment of w / m ² · min was performed.

Next, the silicone resin coating agent was added at 1 g / m
² (dry solid content) is applied to the layer B side and dried at 60 ° C. to form a silicone resin layer. The laminated embossed film is wound at 30 ° C.
mm width as scrap and weigh 26 g / m ²
Was obtained. The physical properties of this packaging film are such that the surface layer (A) has a Beck index (JIS P-811).
9) 125 seconds, center plane average roughness SRa 2.4 μm,
Ten-point average roughness SRz 21.0 μm, center plane height SRd
15.6 μm, center plane trough depth SRv 12.0 μm,
The center plane roughness SGr is 84.3 DOT, the coefficient of static friction (JIS K-7125) in the longitudinal direction (MD) between the surface layers is 0.62, and the coefficient of dynamic friction (J in the longitudinal direction) between the surface layers.
IS K-7125) was 0.50, the coefficient of static friction in the lateral direction (LD) between the surface layers was 0.72, and the coefficient of dynamic friction in the lateral direction between the surface layers was 0.66. Also,
The coefficient of static friction between the surface layer film and the stainless steel plate is 0.
35 and the dynamic friction coefficient was 0.27.

The tensile modulus is 1860k in the machine direction (MD).
g / cm ^2, it was transverse (LD) 1740kg / cm ^2. Here, the vertical direction is the direction of flow of the film extruded from the T-die (the direction perpendicular to the T-die), and the horizontal direction is the direction perpendicular to this (the film width direction). After the sanitary napkin is folded in three on the surface of the silicone resin layer of the packaging film and the adhesive layer 2a of the napkin is adhered to the silicone resin layer (D), both ends of the packaging film are folded and incorporated. The central overlapping portion 1b is made of a hot melt adhesive, and both end portions 1a and 1c are made of 110.
Cold seal at ℃, and 12m width at center overlap
m, adhesive paper T of length 25mm is stuck and length 100m
An individual package consisting of a bag containing a napkin having a length of 90 mm, a width of 90 mm and a height of 27 mm was formed. This individual package 400
20 bags, 30 bags or 40 bags in one row at a time
The line was set on a machine for automatic filling and packaging to check whether continuous automatic filling and packaging were possible. Table 1 shows the number of rows of bags in which the bag pops out during stacking as a failure.

Example 2 The following surface layer resin composition (A): (a) 70 parts by weight of a linear low density polyethylene having a density of 0.914 g / cm ³ obtained by polymerization using a Ziegler catalyst; (b) high-pressure low-density polyethylene 15 parts by weight of a density 0.920 g / cm ^3, the polyethylene 15 parts by weight of a density 0.912 g / cm ³ obtained by polymerization using a (c) metallocene alumoxane catalyst, (e 7) 7 parts by weight of zeolite having an average particle size of 4 μm and a pore size of 5 Å, (f) 0.5 parts by weight of an antistatic agent

The following intermediate resin composition (C): (a) 84 parts by weight of a linear low-density polyethylene having a density of 0.914 g / cm ³ obtained by polymerization using a Ziegler catalyst; 16 parts by weight of polyethylene having a density of 0.912 g / cm ³ obtained by polymerization using a metallocene-alumoxane catalyst, (e) 7 parts by weight of calcium carbonate having an average particle diameter of 3 μm, (f) 0.5 parts by weight of an antistatic agent Department,

The following resin (B) for the inner surface layer: (a ′) 80 parts by weight of polyethylene having a density of 0.914 g / cm ³ obtained by polymerization using a metallocene-alumoxane catalyst, and 80 parts by weight of (b ′) Ziegler catalyst 20 parts by weight of linear linear polyethylene (ethylene / hexene-1 copolymer) having a density of 0.914 g / cm ³ , which was polymerized by using the above resin, and melt-kneaded at 260 ° C. using separate extruders. Are supplied to two co-extrusion T dies, and A
/ C / B layer and a three-layer film (wall thickness 2) at 250 ° C.
5 μm: A layer / C layer / B layer = 5/15/5 μm), and then emboss roll (rubber roll: 30 parts by weight of alumina particles having a particle diameter of 15 μm, particle diameter of 110 μm) provided 25 cm below the die. 30 parts by weight of alumina particles, 40 parts by weight of silicon rubber, metal chill roll: silk sculpture of wire number 110, temperature 35 ° C.) so that layer A side is in contact with rubber roll and layer B side is in contact with metal chill roll. Embossing was performed at a pressure of 5 kg / cm, and then corona discharge treatment was performed on both sides of the film at 40 w / m ² · min. Next, a silicone resin coating agent was applied to the layer B side in an amount of 1 g / m ² (dry solid content),
After drying at 0 ° C. to form a silicone resin layer, the laminated embossed film was wound up at 30 ° C., and while being unwound, 100 mm width of the end was cut off as scrap to obtain a packaging film.

Comparative Example 1 In Example 1, the rubber roll had an average particle size of 15 μm.
A packaging film was obtained in the same manner except that a rubber roll composed of 60 parts by weight of alumina particles and 40 parts by weight of silicone rubber was used. Comparative Example 2 In Example 1, silicone rubber 10 was used as the rubber roll.
A packaging film was obtained in the same manner except that a rubber roll consisting of 0% by weight was used.

Example 3 The following resin composition for a surface layer (A): (a) a linear low-density polyethylene (ethylene-butene-1) having a density of 0.914 g / cm ³ polymerized using a Ziegler catalyst; (B) 25 parts by weight of high-pressure low-density polyethylene having a density of 0.900 g / cm ³ , (c) metallocene complex ethylene-bis (4.5.6.7-tetrahydroindenyl) 15 parts by weight of polyethylene (ethylene-hexene-1 copolymer: hexene content: 22% by weight) having a density of 0.912 g / cm ³ obtained by polymerization using a zirconium dichloride.methylalumoxane catalyst; (d) density 20 parts by weight of high density polyethylene of 0.945 to 0.970 g / cm ³ , (e) 2.5 parts by weight of artificial zeolite having an average particle size of 5 μm and a pore size of 5 Å ,

The following resin composition for an intermediate layer (C): (a) 38 parts by weight of a linear low-density polyethylene having a density of 0.914 g / cm ³ polymerized using a Ziegler catalyst, and (b) a density of 0 15 parts by weight of high-pressure low-density polyethylene of 900 g / cm ³ , (c) 17 parts by weight of polyethylene having a density of 0.912 g cm ³ obtained by polymerization using a metallocene-alumoxane catalyst, (d) density of 0.945 to 0.945 30 parts by weight of high-density polyethylene of 0.970 g / cm ³ , (e) 3 parts by weight of calcium carbonate having an average particle size of 3 μm, (f) 0.5 parts by weight of bisamide stearate,

The following resin composition (B) for the inner surface layer: (a ′) 100 parts by weight of polyethylene having a density of 0.914 g / cm ³ obtained by polymerization using a metallocene-alumoxane catalyst; Is 5 μm, 7 parts by weight of artificial zeolite having a pore size of 5 Å. The above resins are melt-kneaded at 245 ° C. using separate extruders, and supplied to one co-extrusion T-die.
/ C / B layer and a three-layer film (wall thickness 2) at 250 ° C.
5 μm: A layer / C layer / B layer = 5/15/5 μm), and then emboss roll (rubber roll: 30 parts by weight of alumina particles having a particle diameter of 15 μm, particle diameter of 110 μm) provided 25 cm below the die. 30 parts by weight of alumina particles, 40 parts by weight of silicon rubber.Metal chill roll: silk sculpture of wire number 110, temperature 35 degrees), wire so that layer A side is in contact with rubber roll and layer B side is in contact with metal chill roll. The film was embossed at a pressure of 3 kg / cm, and then corona discharge treatment was performed on both sides of the film at 50 w / m ² · min. Next, a silicone resin coating agent was applied to the layer B side in an amount of 1 g / m ² (dry solid content),
After drying at 0 ° C. to form a silicone resin layer, the laminated embossed film was wound up at 30 ° C., and while being unwound, 100 mm width at the end was cut off as a scrap to obtain a packaging film having a basis weight of 26 g / m ² .

Example 4 The following resin composition for a surface layer (A): (a) a linear low-density polyethylene (ethylene-butene-1) having a density of 0.914 g / cm ³ polymerized using a Ziegler catalyst; (B) 25 parts by weight of high-pressure low-density polyethylene having a density of 0.900 g / cm ³ , (c) metallocene complex ethylene-bis (4.5.6.7-tetrahydroindenyl) 15 parts by weight of polyethylene (ethylene-hexene-1 copolymer: hexene content: 22% by weight) having a density of 0.912 g / cm ³ obtained by polymerization using a zirconium dichloride.methylalumoxane catalyst; (d) density 20 parts by weight of high-density polyethylene of 0.945 to 0.970 g / cm ³ (e) 3.75 parts by weight of artificial zeolite having an average particle size of 5 μm and a pore size of 5 Å

The following resin composition (C) for an intermediate layer: (a) 38 parts by weight of a linear low-density polyethylene having a density of 0.914 g / cm ³ polymerized using a Ziegler catalyst; 15 parts by weight of high-pressure low-density polyethylene of 900 g / cm ³ (c) 17 parts by weight of polyethylene having a density of 0.912 g cm ³ obtained by polymerization using a metallocene-alumoxane catalyst (d) Density of 0.945 to 0.970 g / Cm ³ high-density polyethylene 30 parts by weight (e) Calcium carbonate having an average particle size of 3 μm 3 parts by weight (f) Stearic acid bisamide 0.5 part by weight

The following resin (B) for the inner surface layer: (a ′) 100 parts by weight of polyethylene having a density of 0.914 g / cm ³ and obtained by polymerization using a metallocene-alumoxane catalyst. Melt-kneading at 245 ° C. using an extruder, and feed to one co-extrusion T-die.
/ C / B layer and a three-layer film (wall thickness 2) at 250 ° C.
5 μm: A layer / C layer / B layer = 5/15/5 μm), and then emboss roll (rubber roll: 30 parts by weight of alumina particles having a particle diameter of 15 μm, particle diameter of 110 μm) provided 25 cm below the die. 30 parts by weight of alumina particles, 40 parts by weight of silicon rubber.Metal chill roll: silk sculpture of wire number 110, temperature 35 degrees), wire so that layer A side is in contact with rubber roll and layer B side is in contact with metal chill roll. The film was embossed at a pressure of 3 kg / cm, and then corona discharge treatment was performed on both sides of the film at 50 w / m ² · min. Next, a silicone resin coating agent was applied to the layer B side in an amount of 1 g / m ² (dry solid content),
After drying at 0 ° C. to form a silicone resin layer, the laminated embossed film was wound up at 30 ° C., and while being unwound, 100 mm width at the end was cut off as a scrap to obtain a packaging film having a basis weight of 26 g / m ² . Reference Example Table 1 shows the physical properties of films of commercially available sanitary disposable napkin bags (the surface of an ethylene-based resin film which was solid printed with a printing ink containing glass powder).

[0051]

[Table 1]

[0052]

According to the packaging film of the present invention, when the automatic filling package is stacked, the bag is less likely to pop out, and two times at a time.
Automatic filling packaging of 0 bags or more is possible. In addition, cold sealing is possible, and the bag can be easily opened. Furthermore, the rubbing sound between the bags is 2 to 4 d higher than that of a commercial product (solid printing).
It is as low as B, and the rubbing noise is not bothersome. In particular, in an individual package such as a sanitary napkin, the packaging film of the present invention does not require a release paper to be attached to the adhesive layer of the napkin, so that a woman can wrap a used sanitary napkin and discard it. There is no need to worry about the rubbing noise between the release paper and the film.

[Brief description of the drawings]

FIG. 1 is a plan view of an apparatus for manufacturing a packaging film.

FIG. 2 is a view showing a process of automatic filling and packaging.

FIG. 3 is a top view showing a process of automatic filling and packaging.

FIG. 4 is a plan view showing a process of automatic filling and packaging.

FIG. 5 is a perspective view in which a part of a package is cut away.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Wrapping film 2 Packed thing 3 bags 4 Outer bag 101 T die 103 Rubber roll 104 Metal chill roll 105 Corona discharge treatment machine 106 Silicon resin coating liquid 107 Dryer 108 Starch coater A Surface layer B Inner layer C Intermediate Layer D Silicon resin layer

Continuing on the front page (72) Inventor Akihiko Taba 1374, Omochi-onji Temple, Iwatsuki-shi, Saitama Prefecture, Japan Diaplastic Co., Ltd. 3E086 AA01 AD01 BA15 BB55 CA35 DA02 4F207 AA04 AA05 AA07 AA08 AA33 AE10 AG01 AG03 AH81 KA01 KA17 KB26 KK82 KK85 KL84 KW41 KW42

Claims (12)

[Claims] 1. The surface roughness (JIS B-0601) is
The center surface average roughness SRa shows physical properties of 1.3 to 6.0 μm and the ten-point average roughness SRz 15 to 40 μm, and the static friction coefficient between the longitudinal directions of the surface layers is 0.35 to 0.80, and the longitudinal direction is Dynamic friction coefficient between each other is 0.30 to 0.75, and the difference between the static friction coefficient and the dynamic friction coefficient in the same direction is 0.05.
A packaging film having a silicon resin coat layer on the front surface and the back surface made of the above ethylene-based resin film. 2. The packaging film according to claim 1, wherein the Beck index (JIS P-8119) of the surface layer of the packaging film is 80 to 300 seconds. 3. The surface layer has a coefficient of static friction in the longitudinal direction of the surface layer of 0.40 to 0.80, a coefficient of dynamic friction in the longitudinal direction of 0.30 to 0.70, and a static friction in the same direction. 3. The packaging film according to claim 2, wherein the difference between the coefficient and the dynamic friction coefficient is 0.1 or more. 4. The surface layer has a center plane height SRd of 5-2.
3. The packaging film according to claim 2, wherein the film has physical properties of 0 μm, a center plane valley depth SRv of 7 to 20 μm, and a center plane roughness of SGr of 60 to 100 DOT. 4. 5. The packaging film has a basis weight of 12 to 80 g / gram.
m ² , and the surface layer has (a) a density of 0.880 to 0.93
Linear low density polyethylene 5 g / cm ³ 30 to 85 wt%, (b) high-pressure density 0.900~0.935g / cm ³ low-density polyethylene 5 to 40% by weight, with (c) a metallocene catalyst 0.880 ~
0.935 g / cm ³ low density polyethylene 0-30
% By weight, (d) density 0.945 to 0.970 g / cm ³
High-density polyethylene having an average particle size of 0.1 to 2 with respect to 100 parts by weight of an ethylene resin having a composition of 0 to 60% by weight.
0-μm inorganic fine powder is based on an ethylene-based resin composition blended in a ratio of 1 to 100 parts by weight,
The packaging film according to any one of claims 1 to 4, further comprising a silicone resin coat layer on the back surface. 6. The packaging film comprises a low-density polyethylene 30 having a density of 0.880 to 0.935 g / cm ³ , which is obtained by polymerization using a surface layer (A) of an ethylene-based resin composition and a metallocene catalyst. ~ 100% by weight and density 0.8
80 to 0.935 g / cm ³ linear linear polyethylene
Inner layer of ethylene resin containing 70 to 0% by weight (B)
The packaging film according to claim 5, wherein a silicone resin coat layer is provided on an inner layer surface of a laminated film having at least: 7. (a) Density 0.880 to 0.935 g /
30 to 85% by weight of linear low-density polyethylene of cm ³ , (b) 5 to 40% by weight of high-pressure low-density polyethylene of 0.900 to 0.935 g / cm ³ , and (c) polymerization using a metallocene catalyst 0.880-0.
The average is based on 100 parts by weight of a low-density polyethylene having a composition of 935 g / cm ³ , 0 to 30% by weight, and (d) a high density polyethylene having a density of 0.945 to 0.970 g / cm ³ , having a composition of 0 to 60% by weight. Particle size 0.1 ~ 20μ
surface layer (A) of an ethylene-based resin composition containing 1 to 100 parts by weight of an inorganic fine powder having a density of 0.880 to 0.935 g / cm ^3. Polyethylene 30-80% by weight and (b) density 0.9
High pressure method low density polyethylene of 00 to 0.935 g / cm ³ , density 0.88 obtained by polymerization using metallocene catalyst
0~0.935g / cm ³ of low density polyethylene and density 0.945~0.970g / cm 100 parts by weight of ethylene-based resin of high density polyethylene from selected resin 70 to 20 wt% of the composition of ³ to, Average particle size 0.1
An intermediate layer (C) of an ethylene-based resin composition containing 0 to 50 parts by weight of an inorganic fine powder having a density of 0 to 20 µm, and a density of 0 to 10 obtained by polymerization using a metallocene catalyst.
880-0.935 g / cm ³ low density polyethylene
30-100% by weight and density 0.880-0.935
relative to 100 parts by weight of ethylene-based resin containing a straight chain linear polyethylene 70-0 wt% of g / cm ^3, an inorganic fine powder having an average particle size 0.1~20μm is blended in an amount of 0 to 50 parts by weight A three-layer film having an A / C / B structure having an inner layer (B) of an ethylene-based resin composition and a silicone resin coat layer (D) provided on the inner layer surface, wherein the basis weight is 12 ８０80 g / m ² , the thickness of the surface layer (A) and the inner surface layer (C) is 1 to 30 μm, and the surface layer has a Beck index (JIS P-8119) of 80.
Surface roughness (JIS B-0601): center plane average roughness SRa 1.3 to 6.0 μm, ten-point average roughness SRz 15 to 40 μm, center plane height SRd 5 to 5 seconds
It is a surface layer having a center plane valley depth SRv of 7 to 20 μm and a center plane roughness of SGr of 60 to 100 DOT, and the static friction coefficient between the surface layers is 0.35 to 0.35 in the machine direction (MD).
0.80, lateral direction (TD) 0.40 to 0.80,
The dynamic friction coefficient between the surface layers is 0.30 in the machine direction (MD).
0.75, transverse direction (TD) 0.35 to 0.75,
The difference between the static friction coefficient and the dynamic friction coefficient in the same direction is 0.0
A packaging film having physical properties of 5 or more. 8. The packaging film according to claim 5, wherein the inorganic fine powder is a porous zeolite having an average particle size of 1 to 8 μm. 9. The packaging film has a basis weight of 20 to 40 g /.
m ² , tensile modulus (JIS K-7127) is 200 to
Claim 1, 2, 2,000 kg / cm ²
The packaging film according to any one of 6, 7, and 8. 10. An ethylene-based resin film melt-extruded from a T-die is mixed with inorganic fine particles having a particle size of 2 to 30 μm and fine particles having a particle size of 40 to 300 μm (the difference between the two is at least 30 μm or more). Large) 1: 0.3 ~
20 to 70% by weight in a weight ratio of 1:10, rubber 80 to 30
The embossing process is performed using a rubber roll containing a weight percent and a metal chill roll, and then a silicone resin coat is applied to the back surface, and the silicone resin is dried to obtain an embossed surface. The surface layer of the film has a Beck index (J
ISP-8119) for 80 to 300 seconds, surface roughness (J
ISB-0601) has a center plane average roughness SRa 1.3
Is a surface layer exhibiting physical properties of up to 6.0 μm and a ten-point average roughness SRz of 15 to 40 μm, wherein the coefficient of static friction in the vertical direction between the surface layers is 0.35 to 0.80, and the coefficient of dynamic friction in the vertical direction between the surface layers Is 0.30 to 0.75, and the difference between the static friction coefficient and the dynamic friction coefficient in the same direction is 0.05 or more. 11. The ethylene-based resin film according to claim 10, wherein at least the surface layer is subjected to oxidation treatment such as corona discharge treatment, plasma treatment, and glow discharge treatment before being coated with the silicon resin. Production method of packaging film. 12. An article to be packaged having an adhesive layer, according to claim 1.
A package formed by using the packaging film of (1) above so that the silicone resin coat layer is on the inner side in contact with the article to be packaged and the surface layer is on the outer side.