JP3291969B2 - Polyethylene-based unstretched film, laminated film and bag - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a polyethylene-based unstretched film, and more particularly, to a base material such as a biaxially stretched nylon film, a biaxially stretched polyester film, a biaxially stretched polypropylene film, and a sealant material. As a film to be laminated. More specifically, it does not impair the winding property during film formation, does not cause temporal blocking when the film-formed product is left, and furthermore, for example, sealant materials are used in a process such as dry lamination or bag making. Also, the present invention relates to a polyethylene-based unstretched film having excellent opening properties when made into a bag without causing slippage or blocking between a sealant material and a substrate. Further, the present invention relates to a laminated film comprising the polyethylene-based unstretched film and another plastic film. Further, the present invention relates to a bag using the polyethylene-based unstretched film or the laminated film.

[0002]

2. Description of the Related Art Currently, a biaxially stretched nylon film having excellent pinhole resistance and cold resistance, a biaxially stretched polyester film having excellent heat resistance, stiffness and transparency, and excellent moisture proofness are currently used as food packaging films. A biaxially stretched polypropylene film or the like is used. These base films have excellent properties as described above, but have a relatively high melting point and are inferior in heat sealability because they are biaxially stretched. Therefore, in order to impart heat sealability, a high-pressure method low-density polyethylene, ethylene / α-olefin copolymer, ethylene / vinyl acetate copolymer, polyolefin resin film such as polypropylene, etc. are laminated and used as a sealant material. ing. The sealant material is required to have various functions such as transparency, seal strength, oil resistance, low-temperature sealing property, hot tack property, slip property, blocking resistance, opening property, impact resistance, and suitability for lamination. Its performance varies greatly depending on the resin and additives used. In particular, slip properties, blocking resistance, suitability for lamination,
Opening properties are greatly affected by additives,
Additives that improve these properties include antiblocking agents and slip agents. Organic and inorganic fine particles are used as the anti-blocking agent, and amide compounds and the like are used as the slip agent.

[0003]

Heretofore, in order to improve the slip property and opening property of a film or a bag-made product, it has been attempted to increase the amount of an antiblocking agent or a slip agent to be added. However, for example, when a large amount of a slip agent is added, the slip agent excessively bleeds onto the surface of the sealant before lamination. Sometimes, there is a problem that the heat sealability between the sealant surfaces is hindered. On the other hand, by adding fine particles having a large average particle size as an anti-blocking agent in order to improve the opening property of the bag-made product, a certain effect can be imparted, but the scratch resistance and transparency of the sealant materials are adversely affected. There was a problem of giving. For this reason, measures have been taken to reduce the amount of the slip agent or the anti-blocking agent used and to shake the powder such as starch during dry lamination and bag making to avoid the above problem. However, this not only pollutes around the processing equipment,
It causes problems such as remarkably deteriorating the appearance of food packaging. Improvements have been awaited, but at present it has not yet been satisfied.

[0004] The present invention is not only a film-formed product, but also a laminated film, a bag-formed product, and the like, and further improves the slipping property, blocking resistance, and opening property during long-term storage.
An object of the present invention is to provide a polyethylene-based unstretched film, a laminated film thereof, and a bag using the same, which have solved the problems caused by the conventional powder shake.

[0005]

The above objects are attained by the following inventions. A polyethylene-based unstretched film mainly composed of a polyethylene-based resin and having a blocking strength of 10 g / 70 mm or less. Haze is 15% or less and slip property (tan θ) is 0.1%.
6. The polyethylene-based unstretched film according to the above, which is 6 or less. A laminated film comprising a polyethylene-based unstretched film, wherein at least one outer layer contains an antiblocking agent and a slip agent, and each layer from the layer to the other outer layer has a density gradient, and the other outer layer is It consists of the highest density polyethylene resin, and the high density is 0.900
The polyethylene-based unstretched film according to the above or the above, which has a density of 0.945 g / cm ³ . The above-mentioned polyethylene-based unstretched film, wherein at least the other outer layer does not contain an anti-blocking agent and / or a slip agent. 4. The polyethylene-based unstretched film according to any one of the above items 1 to 3, wherein the anti-blocking agent is inorganic and / or organic fine particles. A laminate film comprising the polyethylene-based unstretched film according to any one of the above and another plastic film. A bag comprising the polyethylene-based unstretched film or the laminated film according to any one of the above. The bag described above, comprising a polyethylene-based unstretched film mainly composed of a polyethylene-based resin and having a blocking strength of 10 g / 70 mm or less and a haze of 15% or less.

Examples of the polyethylene resin constituting the unstretched polyethylene-based film of the present invention include those obtained by mixing one or more selected from ethylene / α-olefin copolymer and high-pressure polyethylene. . The ethylene / α-olefin copolymer is a copolymer of ethylene and an α-olefin having 4 to 18 carbon atoms. As the α-olefin, butene-1 and hexene-
1,4-methylpentene-1, octene-1, decene-
1 and the like. Films obtained from these polyethylene resins have excellent heat seal strength, hot tack, contaminant sealability, and impact resistance, and the polyethylene resin has other properties as long as these properties are not impaired. A resin, for example, an ethylene / vinyl acetate copolymer, an ethylene / acrylate copolymer, or the like may be used as a mixture. Among them, the polyethylene resin used in the present invention has a melt index (MI) of 1 to 10 g / min and a density of 0.890 to 0.945 g from the viewpoint of film forming properties, physical properties and functions of the film formed product, and the like. / Cm ³ is preferred. Here, MI was measured based on ASTM D-1238. The polyethylene resin is synthesized by a method known per se.

[0007] The polyethylene-based unstretched film of the present invention has a blocking strength of 10 g / 70 mm or less. The blocking strength is a measure that can efficiently evaluate the blocking and the opening property of a film-formed product, a laminated film, a bag-formed product, and the like. The smaller the value is, the better the blocking resistance and the opening property are. 10g / 7 blocking strength
If it exceeds 0 mm, blocking resistance and opening properties are significantly impaired, so that a process such as dusting is required. In consideration of the handling properties and the process passability of the film-formed product, the laminated film and the bag-formed product, the preferable range of the blocking strength is 5 g / 70 mm or less.

In the present invention, the blocking strength (g / 7)
0 mm) means that the sealant faces of the 8cm x 12cm film are overlapped, and after the remaining heat treatment at 50 ° C x 30 minutes,
A 5 cm × 5 cm portion is pressed at 50 ° C. × 15 minutes by applying a load of 40 kg with a hot press, and is pressed at 23 ° C. × 65%
Under the conditions of RH, according to ASTM D-1893,
It is a peel strength measured by a tensile tester.

Further, the polyethylene-based unstretched film of the present invention has a haze of 15% or less and a slip property (tan).
θ) is preferably 0.6 or less.

The haze of the polyethylene-based unstretched film of the present invention is preferably 15% or less. Haze is
This is a factor indicating the transparency of a film-formed product, a laminated film, a bag-formed product, and the like. The smaller the value, the better the transparency. If the haze exceeds 15%, the commercial value tends to decrease in terms of transparency, appearance and the like. In consideration of the basic physical properties (transparency, slipperiness), functionality and commercial value of the film, a more preferred haze is 7% or less.

In the present invention, haze refers to JIS-K7
It was measured according to No. 105.

The non-stretched polyethylene-based film of the present invention has a slip property (tan θ) of 0.6 or less.
The slip property (tan θ) indicates the surface friction characteristics of a film-formed product, a laminated film, and a bag-formed product. The smaller the value, the better the slip property. Slip property (tan
When θ) exceeds 0.6, not only the roll winding properties of the film are impaired, but also the processability in, for example, the dry laminating and bag making steps tends to deteriorate, so that dusting or the like is required. Therefore, in consideration of the winding characteristics of the film-formed product and the process passability during processing, a more preferable slip property (t
anθ) is 0.4 or less.

In the present invention, the slip property is measured by measuring the slip angle θ at a slope rising speed of 3.3 ° / sec with respect to the film sealant surfaces using a friction angle measuring device manufactured by Toyo Seiki Co., Ltd. Friction area 62cm ² , load 1kg)
It is represented by tan θ.

The polyethylene unstretched film of the present invention having the above properties may be a single-layer film or a laminated film of the polyethylene resin containing an anti-blocking agent and a slip agent. Is a laminated film, particularly a laminated film composed of a polyethylene-based unstretched film, at least one outer layer contains an anti-blocking agent and a slip agent, each layer from the layer to the other outer layer has a density gradient, The other outer layer is made of a polyethylene resin having the highest density, and can be obtained by forming a laminated film having the high density of 0.900 to 0.945 g / cm ³ .

The polyethylene-based unstretched film of the present invention contains an anti-blocking agent and a slipping agent in view of the opening property and the like. Antiblocking agents and slip agents in the layer tend to inhibit adhesion to the substrate. Also, the slip agent tends to shift to the lower density side. Therefore, the polyethylene-based unstretched film is a laminated film having a density gradient between each layer, and at least one outer layer (sealant surface layer) contains an antiblocking agent and a slip agent, and the other outer layer (laminate surface layer) Is preferably made of a polyethylene resin having the highest density.

The density of the polyethylene resin in the other outer layer is preferably 0.900 to 0.945 g / cm ³ . When the density exceeds 0.945 g / cm ³ , not only adversely affects the impact strength at low temperatures, but also tends to harden the film. If the density of the polyethylene resin in the other outer layer is less than 0.900 g / cm ³ , the film tends to not only lose the basic physical properties (breaking strength, Young's modulus, etc.) but also tends to become a rigid film. . or,
The density of the polyethylene resin used for the other outer layer is closely related to the thickness of the other outer layer. The more preferable density range of the polyethylene resin used for the other outer layer is 0.1.
It is 920 to 0.940 g / cm ³ .

The polyethylene-based unstretched film of the present invention is
When laminated, the density of polyethylene resin in each layer
Is not particularly limited, but as described above, the density gradient
Are preferred. The density of one outer layer is usually 0.1.
900-0.945 g / cm ^Three, Preferably 0.910
~ 0.940 g / cm^ThreeIt is. Also, if the laminated film is 3
When it consists of more than one layer, the density of the intermediate layer is usually 0.90
5 to 0.940 g / cm^Three, Preferably 0.910
0.935g / cm^ThreeIt is.

Further, the polyethylene-based unstretched film of the present invention comprises at least the other outer layer (laminated surface layer)
Preferably contains no antiblocking agent and / or slip agent. The other outer layer is a layer that is bonded to the base material through an adhesive such as a polyether-based or polyester-based adhesive, and is an important layer that ultimately affects the strength and the like of the laminate film and the like. When an antiblocking agent and / or a slip agent enters the layer, not only does it tend to hinder the adhesion to the substrate, but also causes a decrease in the laminate strength between the sealant material and the substrate. Also, the haze of the film tends to be high, and the transparency tends to deteriorate.

The laminated film is preferably composed of 2 to 7 layers, more preferably 3 layers, in view of slipperiness, blocking resistance, breaking elongation, Young's modulus, impact strength, and heat sealing strength. .

The antiblocking agent used in the present invention is not particularly limited, but inorganic and / or organic fine particles are preferable. Specifically, examples of the organic fine particles include, for example, polymethyl methacrylate, polystyrene, polyamide, and the like, which are made of a polymer that does not substantially deform and obtained by emulsion polymerization, suspension polymerization, or the like. Examples of the inorganic fine particles include silica, zeolite, diatomaceous earth, talc, kaolinite, and amorphous aluminosilicate. From the viewpoint of transparency of the film, organic particles of polymethyl methacrylate are preferable, and from the viewpoint of cost, inorganic particles of silica, zeolite and diatomaceous earth are preferable. The average particle size of the anti-blocking agent is not particularly limited, but may be 2 to 15 in consideration of appearance, transparency and blocking properties.
It is preferably about μm, more preferably 5 to 10 μm.

The amount of the antiblocking agent used in the present invention is not particularly limited, and can be freely used as long as the physical properties, appearance and transparency of the film are not impaired. 0.01 to 3 parts by weight, preferably 0.05 to 2 parts by weight. When the polyethylene-based unstretched film of the present invention is laminated,
Suitable amounts of the antiblocking agent to be incorporated in each layer are as follows. In one outer layer, the amount is preferably 0.01 to 3 parts by weight, more preferably 0.05 to 2 parts by weight, based on 100 parts by weight of the polyethylene resin.
In the other outer layer, it is preferable that no anti-blocking agent is blended. In the intermediate layer, the amount is preferably 0.01 to 2 parts by weight, more preferably 0.05 to 1 part by weight, based on 100 parts by weight of the polyethylene resin.

The method of compounding the anti-blocking agent into the unstretched polyethylene-based film of the present invention can be either a master batch method or a pellet blending method immediately before film formation, and is not particularly limited.

As the slip agent used in the present invention, known slip agents can be used, and there is no particular limitation. Examples of the slip agent having a high bleeding speed include hydrocarbon-based slip agents such as liquid paraffin and polyethylene wax. Slip agents, metal soap-based slip agents such as calcium stearate and magnesium stearate, and amide-based slip agents such as oleamide, erucamide, and behenic acid amide are included. Further, as the slip agent having a relatively low bleed rate, for example, ethylene bisoleic acid amide, hexamethylene bis oleic acid amide, ethylene bis erucamide, etc., these slip agents having a relatively low bleed rate can be used alone. However, it is preferable to use the amide slip agent in combination. As the slip agent, oleic acid amide, or a combination system of erucic acid amide and ethylenebisoleic acid amide is more preferable, from the viewpoint of handling properties and slipping properties.

The amount of the slip agent used in the present invention is not particularly limited, and the slip agent can be used freely within a range that does not impair the slip property of the film immediately after film formation and the heat sealing property as a sealant material. It is usually 0.01 to 0.5 part by weight, preferably 0.02 to 0.35 part by weight based on part by weight. When the polyethylene-based unstretched film of the present invention is laminated, suitable amounts of the slip agent blended in each layer are as follows. In one outer layer, polyethylene resin 1
0.01 to 0.05 parts by weight, preferably 0.02 to 0.35 parts by weight, per 100 parts by weight. It is preferable not to mix a slip agent in the other outer layer. In the intermediate layer, the amount is preferably 0.01 to 0.05 part by weight, and more preferably 0.1 to 0.05 part by weight based on 100 parts by weight of the polyethylene resin.
The amount is more preferably from 02 to 0.3 parts by weight.

[0025] The compounding method of the slip agent to the polyethylene-based unstretched film of the present invention may be a masterbatch method.
It is also possible to use a pellet blending method immediately before film formation, and there is no particular limitation.

The method of forming the polyethylene-based unstretched film of the present invention is not particularly limited, and for example, a blown multilayer extrusion method, a T-die multilayer extrusion method, or the like can be used.

The thickness of the polyethylene-based unstretched film of the present invention is not particularly limited, but is preferably from 10 to 150 μm, more preferably from 20 to 100 μm. When the polyethylene-based unstretched film of the present invention is laminated, preferred thicknesses are as follows. The thickness of one outer layer is preferably from 1 to 40 μm, more preferably from 2 to 30 μm. The thickness of the other outer layer is preferably 1 to 40 μm,
2-30 micrometers is more preferable. The total thickness of the intermediate layer is 10
80 μm is preferable, and 20 to 70 μm is more preferable.

When the polyethylene-based unstretched film of the present invention is laminated, the thickness ratio of each layer is preferably 0.2 to 5 with respect to the thickness 1 of the other outer layer and 0.2 to 5 with respect to the thickness of the other outer layer. 5 to 3 are more preferred. Further, the total thickness of the intermediate layer is preferably 1.5 to 25, more preferably 2 to 20, with respect to the thickness 1 of the other outer layer. In particular, when the laminated film is 3
In the case of a layer configuration, the thickness ratio is preferably about 1/2/1 to 1/20/1 in consideration of film forming properties, film physical properties, and film functional aspects in view of the other outer layer / intermediate layer / one outer layer. .

If necessary, known additives such as an antistatic agent, a weathering agent, an antioxidant, a heat stabilizer, and a coloring agent may be added to the unstretched polyethylene-based film of the present invention.

The polyethylene-based unstretched film can be used as a laminate film with another plastic film. The other plastic film is not particularly limited, but a biaxially stretched plastic film is preferable.From the viewpoint of breaking strength and elongation, Young's modulus, impact strength, heat seal strength, etc., biaxially stretched nylon film, polyester film and polypropylene Films and the like are more preferred. The thickness of other plastic films varies depending on the purpose, but is usually 5 to 30 μm,
Preferably it is 10 to 25 μm. The lamination may be performed by a method known per se, such as dry lamination or extrusion lamination.

The bag of the present invention comprises the above-mentioned polyethylene-based unstretched film, and is preferably mainly composed of a polyethylene-based resin, and has a blocking strength of 10 g / 70 mm or less and a haze of 15% or less. It comprises a stretched film. By including the polyethylene-based unstretched film, a bag excellent in opening property can be obtained. When the polyethylene-based unstretched film to be used is a laminated film having a density gradient between each layer, the bag is formed by one outer layer surface matching. The bag of the present invention is preferably manufactured using a laminated film obtained by laminating a polyethylene-based unstretched film with a biaxially stretched nylon film, polyester film, polypropylene film or the like as described above. The bag making method may be performed by a method known per se, and examples thereof include a bag making method using a simple manual sealer and an automatic bag making method using a three-side seal or fusing seal bag making machine.

[0032]

Next, the present invention will be described in more detail with reference to examples, but the present invention is not limited to these examples. In addition, a method for measuring characteristic values in Examples and Comparative Examples will be described.

(1) Density The density was measured according to the method specified in JIS-K6760.

(2) Blocking strength 8 cm × 12 cm film sealant faces are superimposed on each other, and after a 50 ° C. × 30 minute heat treatment, 5 cm × 5 cm
Apply 50kg load to the part by hot pressing 50 ℃ ×
It was pressurized for 15 minutes, and measured under a condition of 23 ° C. × 65% RH as a peel strength (g / 70 mm) using a tensile tester in accordance with ASTM D-1893. The smaller the value, the better the blocking resistance.

(3) Slip property Using a friction angle measuring device manufactured by Toyo Seiki Co., Ltd., the slip angle θ was measured with respect to the sealant surfaces of the film at an inclination rising speed of 3.3 ° / sec (the friction area was 62 cm ² , Load 1kg)
And represented by tan θ. The smaller the value, the better the slip property.

(4) Haze Measured according to JIS-K7105. The smaller the value, the better the transparency.

(5) Appearance The surface condition of the film was judged with the naked eye. ：: Extremely few irregularities and high smoothness. Δ: There are considerable irregularities and lack in smoothness. ×: Extremely large irregularities and extremely poor smoothness.

The raw materials used in Examples and Comparative Examples are shown below. (1) Polyethylene resin (R) R1: MI = 2, density = 0.935 g / cm ³ R2: MI = 2, density = 0.920 g / cm ³ R3: MI = 2, density = 0.910 g / cm ³ R4: MI = 2, density = 0.008 g / cm ³

(2) Anti-blocking agent (ABA) ABA1: average particle diameter of 10 μm, organic fine particles (crosslinked polymethyl methacrylate) ABA2: average particle diameter of 2 μm, organic fine particles (crosslinked polymethyl methacrylate) ABA4: average particle diameter of 6 μm , Inorganic fine particles (zeolite)

(3) Slip agent (SA) EA: erucamide OA: oleamide EBA: ethylenebisoleamide HBA: hexamethylenebisoleamide

Example 1 The resin composition of each layer (layer A (laminated surface layer), layer B (intermediate layer), layer C (sealant surface layer)) was as follows. Layer A: polyethylene resin (R1) Layer B: 0.05 part by weight of ABA1, 0.03 part by weight of EA, and 0.09 part by weight of EBA based on 100 parts by weight of polyethylene resin (R2) C layer : ABA1 1.00 part by weight, EA 0.02 part by weight, EBA 0.10 part by weight based on 100 parts by weight of polyethylene resin (R3). The B layer is melted at 220 ° C. using an extruder having a diameter of 90 mm, and is then formed with a multi-manifold three-layer T-die so that the thickness ratio of the A layer, the B layer and the C layer becomes 1/6/1. And a 60 μm polyethylene-based unstretched film. The obtained film had no problem in appearance or slip property.

Examples 2 to 3 Resin compositions having the contents shown in Table 1 were formed in the same manner as in Example 1 to obtain polyethylene-based unstretched films of 60 μm each. The obtained film had no problem in appearance and slip property similarly to the film obtained in Example 1.

Comparative Examples 1 to 4 Resin compositions having the contents shown in Table 1 were formed in the same manner as in Example 1 to obtain polyethylene-based unstretched films of 60 μm each. All of the films obtained in Comparative Examples 1 and 2 had poor slip properties and were in a state of easily blocking. On the other hand, the film obtained from Comparative Example 3 had conspicuous surface irregularities and had a problem in appearance. Comparative Examples 3 to
Each of the films obtained from No. 4 was poor in transparency.

[0044]

[Table 1]

Table 2 shows the blocking strength, haze and slip properties of the polyethylene-based unstretched films (single films) obtained from Examples 1 to 3 and Comparative Examples 1 to 4.

Example 4 The films obtained in Examples 1 to 3 and Comparative Examples 1 to 4
After aging at 0 ° C. for 48 hours, dry lamination was performed using a biaxially stretched nylon film (15 μm) and a corona discharge treated surface as a bonding surface (adhesive: polyether type, no powder vibration). After aging (50 ° C. × 96 hours) of the obtained laminate film, the blocking strength, haze, slip property and the like were evaluated. Table 2 shows the results.

[0047]

[Table 2]

As is clear from the results in Table 2, Examples 1 to
The film obtained in No. 3 had no problem in appearance, and was able to impart excellent slip resistance and extremely excellent blocking resistance. On the other hand, those according to Comparative Examples 1 and 2 were poor in slip properties and easily blocked. The films obtained in Comparative Examples 3 and 4 were poor in transparency and poor in slip properties and blocking resistance. In particular, the laminated film of Comparative Example 3 had noticeable unevenness on the surface and had an unfavorable appearance. This seems to be due to the effect of the anti-blocking agent in the layer A. The blocking strength "0" described in Table 2 indicates that the film was completely peeled off and no blocking was performed.

Example 5 Using the laminate film obtained in Example 4, bag making (size: 150 mm × 210 mm, speed: 2)
1 m / min, seal width: 10 mm, seal temperature: 150
° C, without powder shaking), and the suitability for bag making was evaluated. Table 3 shows the results.

[0050]

[Table 3]

The openability shown in Table 3 means that immediately after bag making, and in an atmosphere of 50 ° C. × 80% RH and 10 ° C. × 20% RH, 1000 bags (100 bags × 10 bundles) were stored for 30 days. It is the result of evaluating the mouth openability of the bag by hand after stacking.
The evaluation is as follows. ：: There is no blocking on the inner surface of the bag, and the mouth is easily opened. ×: The inner surface of the bag is blocked and does not easily open.

The sled is a visual result of evaluating the degree of sled when 100 bags are bundled. The evaluation is as follows. ：: All bundled films are flat (no warpage). ×: The end and a part of the bag are warped, and the bundled film is in a rough state.

The bag-made products using the films obtained in Examples 1 to 3 had excellent opening properties even without dusting, and there was no change in the warpage or the like of the bag-made products. On the other hand, the bag-made products using the films obtained in Comparative Examples 1 to 4 all had poor slip properties and very poor opening properties. Each of the bag-making products had a warp. In particular, in the case of the bag-making product using the film obtained in Comparative Example 3, the unevenness of the surface was conspicuous, and the appearance was significantly impaired.

[0054]

According to the present invention, not only a film-formed product, but also a laminated film, a bag-formed product, and the like, and the processing steps thereof, as well as the slip property, blocking resistance, and opening property during long-term storage are greatly improved. In addition, it is possible to provide a polyethylene-based unstretched film, a laminate film thereof, and a bag using the same, which eliminate the problem of dusting, which has been a problem in the past, eliminate the problem of contamination in the processing step, and significantly improve the appearance. The polyethylene-based unstretched film of the present invention can be widely developed as a food packaging film or the like.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification code FI // C08L 23:00 C08L 23:00 (72) Inventor Tsutomu Isaka 2-2-2-8 Dojimahama, Kita-ku, Osaka-shi, Osaka Toyobo (56) References JP-A-59-75910 (JP, A) JP-A-5-194664 (JP, A) JP-A-6-9724 (JP, A) JP-A 8-277335 (JP) , A) JP-A-7-165824 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) C08J 5/18 B32B 27/32

Claims (5)

(57) [Claims] Claims: 1. A polyethylene-based resin as a main component, and
Polyethylene containing anti-blocking agent and slip agent
Non-stretched film that satisfies the following (i) to (v)
And a polyethylene-based unstretched film. (i) One outer layer, the other outer layer, and any
And an intermediate layer from one outer layer to the other outer layer.
The density of polyethylene-based resin that constitutes
Gradients or one of the outer layers
The density of the polyethylene resin is higher than the density of the other outer layer.
The density of the ethylene resin is high and the middle layer
The density of the polyethylene resin is the same as that of the other outer layer
Is formed. (ii) One outer layer is an anti-blocking agent and a slip agent
And the other outer layer contains an anti-blocking agent and
Contains no slip and / or slip agents. (iii) The anti-blocking agent has an average particle size of 5 to 10
μm. (iv) The density of the polyethylene resin in the other outer layer is 0.
900 to 0.945 g / cm ³ . (v) The blow of the film measured by the following method (A)
The locking strength is 10 g / 70 mm or less. (A) 8 cm × 12 cm film sealant faces are superimposed on each other.
Apply a load of 40 kg to the 5 cm
It is pressurized at 0 ° C. × 15 minutes, and measured under a condition of 23 ° C. × 65% RH as a peel strength (g / 70 mm) using a tensile tester in accordance with ASTM D-1893. 2. Haze is 15% or less, slip property (ta)
The polyethylene-based unstretched film according to claim 1, wherein (nθ) is 0.6 or less. 3. The method according to claim 1, wherein the anti-blocking agent is inorganic and / or
The polyethylene-based unstretched film according to claim 1 or 2, which is an organic fine particle . 4. The polye according to claim 1, wherein
Tylene unstretched film and other plastic films?
Laminated film . 5. The polye according to claim 1, wherein
Styrene-based unstretched Fi Lum or Ramine of claim 4, wherein
A bag comprising a film .