JP3403666B2 - Soft polyolefin resin composition - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [0001] TECHNICAL FIELD The present invention relates to heat resistance and flexibility.
And a soft polyolefin resin composition having
It relates to the film used. Especially suitable for stretch packaging
The present invention relates to a resin composition for a film and a film using the same.
You. [0002] [Prior Art] Foods such as fruits and vegetables, fresh fish, meat, prepared foods,
Store the product directly or on a plastic tray, etc.
Film (stretch wrapping film)
There are several required characteristics.
Specifically, a) that it has excellent stretchability (elongation load
Is small and the breaking elongation is large).
Not to tear (high impact strength), c)
Excellent sealability, d) Display effect
(The film is transparent, glossy and has good anti-fog properties
That). [0003] Films satisfying these required characteristics have been developed.
Japanese Patent Application Laid-Open No. 9-174774 discloses ethylene-acetic acid vinyl acetate.
Surface layers such as benzyl copolymer (EVA) and a stretching auxiliary layer;
Crystalline polypropene homologous to crystalline polybutene-1
Polyolefin based on a composition layer with heat (heat-resistant layer)
Resin multilayer stretch films have been proposed. This file
The film has a wide minimum temperature at which the surface layer can be heat-sealed.
EVA with a melting point of about 90 ° C is applied to the heat-resistant layer so that it can be removed.
High crystallinity so that the maximum temperature at which heat sealing is possible can be widened
Isotactic polypropylene with a melting point of around 165 ° C
Use Therefore, heat of other commercial films
The sealable temperature range is about 20-30 ° C.
The temperature at which this film can be heat-sealed is 55 ° C.
Excellent degree and heat sealability. In addition,
The standard 100% elongation load is 250 in the machine direction (MD).
~ 550g / cm width, 50 ~ 200g in transverse direction (TD)
/ Cm width, upside-down packaging machine at the time of proposal, such as Fuji
Suitable for Kikai A-18X, A-18K and the like. [0004] However, hand packaging and the recent rapid spread
One type of highly stretch-type packaging machine,
For example, Isida Wmini-Zero series, Seira Teraoka
Kosha AW3600, FX3600, TEC ELI
It was often unsuitable for XA and the like. On the other hand,
In order to achieve both heat and stretch, a heat-resistant layer
Pyrene-α-olefin random copolymer as main component
Composition layer, and an EVA layer is laminated on both surfaces to form a three-layer composition.
Structured film (Japanese Patent Publication No. 4-50904)
Or a vinyl aromatic compound in a propylene-based random polymer
And a conjugated diene copolymer or a hydrogenated derivative thereof
Stretch film consisting of blended composition layers
JP-A-4-270745, JP-A-8-119319
And the like have been proposed. [0005] SUMMARY OF THE INVENTION
The composition for the heat-resistant layer imparts transparency and gloss to the film.
Melting point temperature (Tp
m) is less than 150 ° C and low in crystallinity
Is not provided, and therefore, the conventional film
Only films with poor heat resistance can be obtained
won. The present invention provides a conventional high impact resistance and high heat resistance.
Toseal properties, high display properties (specifically, transparency, light
With excellent stretchability while maintaining
Soft with excellent heat resistance, suitable as a heat-resistant layer of film
Polyolefin resin composition and film using the same
The purpose is to provide. [0007] Means for Solving the Problems The present inventors have solved the above problems.
As a result of intensive studies to achieve the present invention, the present invention was accomplished.
Was. That is, the present invention (1)As a heat-resistant layer (H layer), a differential scanning calorimeter (DS)
With a heat of fusion of 15 to 80 J / g measured in C), the melting peak
Polypropylene whose cooling temperature (Tpm) is 150 ° C or higher
Polymer (A) 100 parts by weight and poly / 1-butene polymer
Soft polyolefin comprising 30 to 400 parts by weight of body (B)
Containing both resin compositions and shown as both surface layers (S layers)
Melting peak temperature measured by differential scanning calorimeter (DSC)
(Tpm) contains a polyolefin resin having a temperature of 100 ° C. or less.
Characterized by having a multilayer film for packaging. Hereinafter, the present invention will be described in detail. Book
Inventionthe filmIsAs heat resistant layer (H layer)Specific thermal properties
Polypropylene polymer (A) having a polymer
Ten polymer (B) andincluding. Has the above specific thermal properties
Is a polypropylene polymer (A)
Propylene homopolymer or propylene with a city index of 90 or more
And ethylene and α-olefins having 4 or more carbon atoms
Is random copolymer (hereinafter abbreviated as random PP)
Different, melting peak temperature (Tpm) measured by DSC
Was measured by DSC with "heat resistant component" of 150 ° C or higher
"Amorphous," which has a heat of fusion of 15 to 80 J / g
A so-called block copolymer consisting of `` flexible components ''
Or propyle with isotacticity index less than 90
Homopolymer (hereinafter, collectively referred to as block PP)
). Generally, the block PP is used for film applications.
Rarely offered. The reason is that it is highly crystalline and the melting point is 160
Similar to isotactic polypropylene at approx.
The heat-resistant components in the PP are crystallized when they turn into a film.
This is because only a film having poor transparency can be obtained. Again
Even if quenching after melt extrusion suppresses crystallization of heat-resistant components,
Rock PP has a morphology that is not
Crystalline and flexible component islands in the order of several μm to sub-μm
It is dispersed and when stretched to form a film,
Surface becomes rough and the film becomes opaque as a result.
Tend to be. [0010] Therefore, the present inventors have stated that “there is a specific thermal characteristic.
Polypropylene polymer (A) "=" specific block
Utilizing the heat-resistant and flexible properties of "PP",
For compositions that can produce a transparent film when formed into a film
As a result of intensive studies, the above composition was found. What
The block PP referred to here is propylene and carbon
Only block copolymer with α-olefin other than 3
However, even if it is a homopolymer of propylene,
Each part of tick PP and atactic PP is fine
Polymers with main structure are also substantially blocked by their structure
It can be included in the category of PP. In the latter case, boiling n
-Isotactic as heptane insolubles
A propylene homopolymer having an index of less than 90, more preferably
Is propylene alone with an isotactic index of 55 to 85
A polymer is one such example.
No. 4,370,437. In a concrete example, the first embodiment, which will be described later,
Run. No. 1 and Comparative Example 1, Run. N
o. In comparison with the film No. 2, as shown in Table 1,
A polypropylene-based polymer (A) having specific thermal properties;
The composition comprising the poly-1-butene polymer (B) is resistant to
Run. No. Film 1 is transparent
(HAZE = 1.8%) Glossiness is excellent (GLOSS = 13)
0%), which is excellent in optical properties. N
o. Only the polypropylene polymer (A) used in 1 was resistant
Run. No. Film 2 has transparency ×
(HAZE = 3.8%), and the gloss was x (GLOSS = 1)
05%), and the optical characteristics were clearly inferior. [0012] The poly-1 -butene polymer (B)
Instead, very low density ethylene-α-olefin copolymer
Comparative Example 1 using Run. No. In film 3,
HAZE = 5.2%, GLOSS = 95%,
Inferior in transparency to the case of the pyrene polymer (A) alone
It was a film. Further, a poly-1-butene polymer
(B) Instead of polystyrene-based hydrogenated block
Comparative Example 1 using the union, Run. No. With film 4
Is a characteristic of the polypropylene polymer (A) as shown in Table 1.
One of the properties, impact strength is reduced, tearing
Low strength and impact resistance, resulting in poor packaging
Film. [0013] From the above, it can be seen that a port having specific thermal characteristics
Polypropylene-based polymer (A) and poly-1-butene-based polymerization
The composition comprising the body (B) has a composition having specific thermal properties.
The heat resistance and flexibility of the propylene polymer (A)
Taking advantage of certain characteristics, and when forming a film,
It can be seen that this is a composition from which lume can be obtained. Poly-1
The amount of the butene polymer (B) depends on the effect of improving the transparency.
And heat resistance and flexibility of polypropylene polymer (A)
It must be within the range that does not impair the characteristics such as
100 parts by weight of pyrene-based polymer (A)
Butene polymer (B) should be 30 to 400 parts by weight
And preferably 50 to 200 parts by weight. In a specific example, a second embodiment, which will be described later,
Run. No. 7 and Comparative Example 2, Run. N
o. In comparison with the film of No. 9, as shown in Table 2,
Poly-1 butene polymer (B) is polypropylene
Ru which is 33 parts by weight with respect to 100 parts by weight of the combined (A)
n. No. The film of No. 7 has a transparency of ○ (HAZE = 2.
0%) Glossy ○ (GLOSS = 125%) and optical properties
, But the same proportion is 25 parts by weight.
n. No. 9 has a transparency of Δ (HAZE = 3.
0%), the gloss is inferior to Δ (GLOSS = 110%)
Was. In Example 2, Run. No. 8 Phil
And Comparative Example 2, Run. No. Comparison with 10 films
In the above, as shown in Table 2, a poly-1-butene polymer
(B) is 100 parts by weight of the polypropylene polymer (A)
Run. No. 8 film
566 parts by weight as compared with Run. No. 10
Film has high impact resistance and heat resistance during heat sealing (heat
(T2 = 130 ° C)
Was. [0016] From the above, the poly 1-butene polymer
(B) is 100 parts by weight of a polypropylene polymer (A)
30 to 400 parts by weight with respect to
I understand. Next, the polypropylene weight used in the present invention
The fusion (A) has a heat of fusion of 15 to 80 as measured by DSC.
J / g, with melting peak temperature (Tpm) above 150 ° C
is there. As described above, the polypropylene polymer (A)
Is a so-called block PP.
Means that the heat of fusion is at least 15 J / g and the Tpm is at least 150 ° C.
And from the viewpoint of flexibility the heat of fusion
It is necessary to be 80 J / g or less. Show me a concrete example
For example, in Example 3, Run. No. 11 films
And Comparative Example 3, Run. No. For comparison with 13 films
As shown in Table 3, although the melting points were almost the same,
The heat of fusion of the propylene polymer (A) is 23.7 J / g
(Tpm = 155 ° C.). No. Eleven Phil
Lum has good heat sealability (T2 = 140 ℃)
The polymer (A) had a heat of fusion of 1
Run. 3.9 J / g (Tpm = 153 ° C.). N
o. The film No. 13 has a heat sealability of × (T2 = 13
0 ° C.). Especially when heat sealing
The difference becomes clearer as the distance becomes longer, for example, when sealing
Set the interval to 10 seconds and evaluate the heat resistance during heat sealing
Then, Run. No. The film No. 11 has a T2 of 135 ° C.
(Heat sealability is △: Practical level depending on conditions
Le), whereas Run. No. 13 films
There was no temperature condition at which heat sealing was possible. Comparative Example 3, Run. No. In 15
The heat of fusion of the propylene polymer (A) is 61.9 J / g and R
un. No. It is larger than 11, but Tpm is 139 ℃ and 15
Lower than 0 ° C, poor heat sealability as shown in Table 3.
(T2 = 130 ° C.). In Example 3, Run. N
o. Is the point of heat resistance at the time of heat sealing of the film from 11
The heat of fusion of the polypropylene polymer (A) was 15 J /
g or more, Tpm needs to be 150 ° C or more
You. Further, a third embodiment, Run. No.
12 and Comparative Example 3, Run. No. Compare with 14
By comparison, although the melting point is almost the same,
The heat of fusion of the polymer (A) is 77.5 J / g (Tpm = 16
3 ° C.). No. Same weight compared to 12 films
The heat of fusion of coalesced (A) is 84.7 J / g (Tpm = 165
° C). No. 14 film is polypropylene
The lene polymer (A) has poor flexibility, and
Film has low elongation at break in tensile test and high tear strength.
Since the degree was small, the film was inferior in packaging property. In Example 3, Run. No. Twelve figures
From the point of balance between stretch and impact strength, etc.
Et al. Reported that the heat of fusion of the polypropylene polymer (A) was 80J.
/ G or less. More than
Therefore, melting of the polypropylene polymer (A) of the present invention
Heat is 15-80 J / g, preferably 20-80 J
/ G, more preferably 30 to 75 J / g. The melting peak temperature (Tpm) of the composition is
From the viewpoint of heat resistance, the temperature is 150 ° C. or higher, preferably Tp
m is 155 ° C. or more. Where the polypropylene weight
Measurement of heat of fusion and peak temperature of fusion (Tpm) of coalescence (A)
The determination was performed using Perkin Elmer's DSC-7,
The heat of fusion is the amount of the sample according to JIS-K7122.
Are measured under the conditions of 5 to 10 mg and a heating rate of 10 ° C./min.
From the peak developed at the highest temperature
Peak temperature (Tpm) is based on JIS-K7121
Measured under the condition that the sample amount is about 5 mg and the heating rate is 10 ° C / min.
Then, it was determined from the peak that appeared at the highest temperature. The resin satisfying the above-mentioned properties is that Tpm is 1
50 ° C. or higher and highly crystalline polypropylene component (a
1) and an amorphous and flexible component (a2)
Are polymerized in a multi-stage reactor, and a1 and a
2 does not include those obtained by mechanically melt-mixing No. 2. More specific
Specifically, a1 having high crystallinity and a melting point of about 160 ° C.
Isotactic propylene homopolymer or propylene
Ethylene or an α-olefin having 4 or more carbon atoms in an amount of 0.
Random copolymers copolymerized at about 7 mol% or less
It is. A2 is amorphous and / or semi-crystalline
With an atactic propylene homopolymer or propylene
Co-polymer with ethylene or α-olefin with 4 or more carbon atoms
In general, the weight average molecular weight is about 1/10 or less of a1
Above, preferably about half or more, more preferably about the same as a1
Those having a degree or higher are used. If you give a specific example,
"Adf" manufactured by Montell Cataloy process
lex ”, Tokuyama's“ PER ”, Chisso
“NEWCON”, “Idemitsu TPO” by Idemitsu Petrochemical Company, etc.
Is mentioned. Among them, the melting peak temperature measured by DSC
(Tpm) and extrapolation melting start temperature (Tim) (T
pm-Tim) of 12.5 ° C. or higher is preferred.
No. Here, the extrapolation melting start temperature (Tim) is JIS-K
The amount of the sample is about 5 mg and the heating rate is 10
Measured under the conditions of ° C / min,
I asked for it. Within 10 ° C of the hottest peak
Peaks or shoulders are combined into one peak
Deemed the lowest in its peak or shoulder
Extrapolated on the side of the peak or shoulder.
The extrapolated melting onset temperature (Tim) was determined by
It is shown as Onset temperature in DSC-7 manufactured by Co., Ltd. [0025] Tim is lower than Tpm, in other words
If the lower peak of the melting peak is broader,
In the pyrene polymer (A), the amorphous component has a molecular
Compatible at the level, suggesting that the crystal structure was partially disturbed
And therefore a high melting point and highly crystalline component
And flexible and amorphous components simply form a sea-island structure
Not the part that interacted at the molecular level,
Alternatively, it can be estimated that there is a transition region between the two. this
When forming the parts, the chemical structures of both are similar
Is considered to be advantageous.
If it is a homopolymer, the flexible amorphous component is also propylene
It is a copolymer with α-olefins other than 3 carbons
More preferably, it is a propylene homopolymer. Such a polypropylene-based polymer (A)
Has a good dispersibility in the poly-1-butene resin (B).
Significantly improved optical properties of the composition
I do. If a specific example is shown, a fourth embodiment described later, Ru
n. No. 18 and Example, Run. No. Comparison with 21
A polypropylene having a Tpm-Tim of 12.2 ° C.
Run. Using pyrene-based polymer (A). No. In 18
HAZE is 1.8%, and the film looks hazy
Tpm-Tim at 16.4 ° C
Run. Using a certain polypropylene-based polymer (A). N
o. In the 21st, HAZE is 0.8% and transparency is much better
There was a clear feeling. It should be noted that such a polypropylene type
In addition to the polymer (A) and the poly-1-butene resin (B), E
Blend with VA and ethylene-α-olefin copolymer
The advantage of the composition is that it has excellent transparency. rear
Example 6, Run. No. At 24, Tpm
A polypropylene polymer having a Tim of 16.4 ° C.
(A) is 40% by weight, and poly-1-butene resin (B) is
22% by weight, EVA 13% by weight, ethylene-α-ole
A composition comprising 25% by weight of a fin copolymer is heat-resistant.
HAZE is 0.9% and the film used as
Mu had a clear feeling. Incidentally, such a polypropylene-based polymer
(A) and poly-1 butene resin (B)
Looking at the compositions of the examples, Tpm-Tim is 1
40% by weight of a polypropylene-based polymer (A) at 2.2 ° C
% And poly-1 butene resin (B) 60% by weight of Ru
n. No. The composition No. 18 had a Tpm-Tim of 11.5 ° C.
Whereas Tpm-Tim is 16.4 ° C.
40% by weight of polypropylene polymer (A) and poly-1-
Butene resin (B) 60% by weight of Run. No. 21 of
The composition has a Tpm-Tim of 12.9 ° C. like this
And Tpm-Tim of polypropylene polymer (A)
40% by weight of propylene-based polymer (A) and poly 1-bead
Ratio of Tpm-Tim of the composition of 60% by weight of ten resin
By comparison, polypropylene-based weight with large Tpm-Tim
Combined (A) mixed with poly-1-butene resin (B)
Is large (change in Run No. 18).
For 0.7 ° C., Run. No. 21 is 3.
5 ° C), polypropylene polymer (A) and poly 1-bead
Suggests that the interaction of the ten resin (B) is greater
From this, Tpm-Tim is 12.5 ° C. or more.
Polypropylene polymer (A) and poly-1-butene tree
The optical properties of the film comprising the composition with the fat (B) are further improved
It is presumed that it is excellent. Next, the polypropylene polymer of the present invention
(A) is a melt flow rate (MFR: 230 ° C.,
2.16 kg) is 0.1 to 100 g / 10 minutes
Preferably, more preferably 0.5 to 100 g / 10 min.
is there. Extrusion load tends to increase as MFR decreases
And the resulting film has a longitudinal tear strength (M
D) and lateral direction (TD) become poorly balanced (MD
(Weak and strong against TD). MFR also increases
And the balance between MD and TD of tear strength tend to be better
However, if it is too large, the melt tension during extrusion will be small.
Tends to be too stable to be pulled out. Especially after
The double bubble method adopted in Examples 4 to 6 described below
In this case, the amount is most preferably 20 to 100 g / 10 minutes. Next, the component of the poly-1-butene polymer (B)
Examples of the body include 1-butene homopolymer, 1-butene and
Tylene, propylene, α-olefin having 5 or more carbon atoms
And copolymers of which 4
% Or more and the melting peak temperature is 110 ° C or less.
Poly-1-butene polymers are preferred. Poly 1-bute
Polymer (B) has a melt index (MI: 190
2.16 kg) is the above polypropylene polymer
0.1 to 50 g / 10 min for the same reason as (A)
And more preferably 0.5 to 50 g / 10 min.
In the double bubble method, 2 to 10 g / 10 minutes
Is most preferred. The composition of the present invention contains a polypropylene-based heavy
Other than the coalescence (A) and the poly-1-butene polymer (B)
EVA, ethylene / α-olefin copolymer, hydrogenated
Terpene resin, hydrogenated cyclopentadiene resin, petroleum
Resin, copolymer of aromatic compound and conjugated diene or its copolymer
A hydrogenated product may be blended. Conjugated with aromatic compounds
As a hydrogenated product of copolymerization with a diene, a conjugated diene moiety is used.
Hydrogenated and aromatic compounds were hydrogenated (ring hydrogenated)
But hydrogenated ones are refracted with polyolefins.
High permeability due to improved compatibility
This is preferable because a light-emitting composition and film can be obtained. The melting point of the composition was measured by DSC.
The heat is preferably from 7 J / g to 35 J / g.
More preferably, it is 8-35 J / g. Less than 7J / g
Insufficient heat resistance and elastic modulus of the composition, and 35 J / g
When it exceeded, the stretchability tended to be inferior. the film
The total heat of fusion of the composition is 3.5 J / g to 19
J / g, more preferably 4 J / g to 14 J
/ G. Here, the heat of fusion of the composition and the entire film
The heat of fusion of the composition occupies the composition and the film itself.
Determined from the peak that appears at the highest temperature measured by DSC
Polypropylene polymer in the composition
The ratio may be calculated from the ratio of (A). Of the present invention
A multilayer film is a heat-resistant layer (H
As a layer), a layer containing the above composition is contained. The preferred film structure is as described above.
Polypropylene polymer (A) and poly-1-butene-based heavy
A soft polyolefin resin composition comprising the union (B)
In addition to the heat-resistant layer (H layer)
Polyolefin with a solution peak temperature (Tpm) of 100 ° C or less
Multilayer film containing both surface layers (S layers)
Lum. Polyolefin type having Tpm of 100 ° C. or less
Specific examples of the resin include ethylene-vinyl acetate copolymer
(EVA), ethylene such as ethylene-ethyl acrylate
And an ester monomer, an aliphatic unsaturated monocarboxylic acid,
With monomers selected from the group consisting of
One of a copolymer or a copolymer of the above monomer and ethylene
For example, at least a part of a polymer in which at least a part is saponified
Ionic bond by metal ions such as Na, Zn, Mg, etc.
Polymer, density 0.87-0.90 g / cm^Threedegree
Ethylene-α-olefin copolymer. The ethylene-α-olefin copolymer
Specific examples of ethylene and propylene, 1-butene
1-pentene, 1-hexene, 4-methylpentene
Copolymer with α-olefin such as -1,1-octene
Also, the cyclopentadiene monomer, norbornene
Those obtained by copolymerizing a system monomer or the like may be used. In addition, the molecular weight
Cloth is narrow (Mw / Mn is 3.0 or less) and Tpm is 100
Despite low temperature below ℃, the film surface is sticky
None is more preferred. The film may have a three-layer structure of S / H / S.
And S / M / H / S, S / M /
H / M / S, S / M / H / M / H / M / S, and S / M / S
M1 / H / M2 / S, S / M1 / H / M2 / H / M1 /
S (however, M1 ≠ M2) may be used. Of the above, the S layer
Vinyl acetate content of 12 to 18 which is excellent in antifogging property, transparency, etc.
About 10% by weight of EVA as M layer, tensile strength and tear strength
Using ethylene-α-olefin copolymer with excellent properties
Films are preferred. Also, an M layer, preferably S / M1
/ H / M2 / H / M1 / S
Used for collected and re-pelletized resin (rework resin)
You can do it. The thickness ratio of each layer is as follows.
45%, H layer 10-90%, M layer 5-40%
is there. The thickness of the entire multilayer film is generally 5 to 25.
about μm, preferably from the handling and stretchability
It is 7 to 15 μm. Anti-fog on S, H and M layers
Agents, antistatic agents, antibacterial agents, frost inhibitors, ultraviolet absorbers, oxidation
Inhibitors may be added.
Oil or its emulsion, surfactant, powder,
A polymer or the like may be coated. Preferred examples of the antifogging agent include saturated C1
2 fatty acids: C10 fatty acids: C8 fatty acids = 2: 4: 4-
About 8: 1: 1 mixed fatty acid and diglycerin
And polyoxyethylene having an HLB of 12 or more.
And lauryl ester. In particular, the latter in the S layer
Is more preferably obtained by adding the former to the H layer or the M layer.
As a method for obtaining the film of the present invention, T-die cap
Strike method, tenter biaxial stretching method (including simultaneous and sequential),
Elect inflation method, double bubble inflation
And the like. Of these, double bubble inf
The ration method is preferred. Hereinafter, preferred double bubble inflation
The following describes the alternative method. First, separate the resin composition of each layer.
Extruded by various extruders and joined by multilayer circular die
Laminate. This laminate is quenched and solidified by a refrigerant.
It is made into an original shape, folded and taken off. This allows each resin
The layer has low crystallinity and direct inflation
A film with high transparency and high gloss can be obtained as compared with the conventional method. Ju
Surfactant, silicone oil (emulsion)
And the like (including John). Next Hara
Conversely, air was injected to form a tube again, and the tree used for the S layer
Polypropylene resin (A) having a melting point of fat or higher and H layer
And stretched to 4 to 36 times in area ratio
You. After stretching, fold it up and take it off.
Perform corona discharge treatment and the like. Here, the evaluation method of the present invention will be described below. (1) Heat of fusion The heat of fusion was measured using PerkinElmer DSC-7.
And the sample amount is 5 to 5 in accordance with JIS-K7122.
10 mg, the temperature rise and fall rates were 10 ° C./min,
Raise the temperature from room temperature to 200 ° C and hold for 5 minutes.
To -10 ° C and hold for 5 minutes, then to 200 ° C again
From the peak area that appears at the highest temperature when increasing the temperature,
I did. (2) Melting peak temperature (Tpm) Melting peak temperature (Tpm) conforms to JIS-K7121
The amount of the sample was about 5 mg, and the rate of temperature rise and fall was 10 ° C / min.
First, raise the temperature from room temperature to 200 ° C and hold for 5 minutes.
After cooling from 200 ° C to -10 ° C and holding for 5 minutes,
At the highest temperature when heating up to
Sought from the staff. (3) Extrapolation melting onset temperature (Tim) Extrapolated melting onset temperature (Tim) conforms to JIS-K7121.
Therefore, the sample amount was about 5 mg, and the temperature rise and fall rates were 10 ° C /
First, raise the temperature from room temperature to 200 ° C and hold for 5 minutes.
After cooling from 200 ° C to -10 ° C and holding for 5 minutes,
At the highest temperature when heating up to
Sought from the staff. Within 10 ° C of the hottest peak
The peaks or shoulders in the box
The peak or shoulder
Extrapolation based on the peak or shoulder on the cold side
did. The extrapolated melting onset temperature (Tim) is
In Lummer DSC-7, it is indicated as Onset temperature.
You. (4) Elongation load (g / cm width) Sample film is machined vertically (MD) and transversely (TD)
Cut out 100 mm in length and 10 mm in width in the direction
With a tensile tester set to 50 mm
Pulling at a speed of 200 mm / min under the condition of 50% RH,
When the film is 100% deformed (100m between chucks)
m) when 100% elongation load and 200% deformation
Was taken as a 200% elongation load. (5) Breaking stress (kg / cm^Two) Perform a tensile test under the same conditions as the above elongation load measurement, and
The stress at break was divided by the cross-sectional area of the film before pulling
The value was adopted. (6) Elongation at break (%) Perform a tensile test under the same conditions as the above elongation load measurement, and
The amount of deformation at the time of cutting is divided by the original film length and expressed as a percentage.
Indicated. (7) Tear strength (g) Light load tear strength test in accordance with JIS-K7128
The film was measured in the longitudinal and transverse directions. (8) Transparency ·Evaluation method Measure HAZE (%) according to ASTM-D1003.
Specified. ·Evaluation criteria     Scale symbol Remarks HAZE ≦ 1.3 ◎ Excellent transparency 1.3 <HAZE ≦ 2.0 ○ A level with no practical problem 2.0 <HAZE ≦ 3.0 △ or less, practically problematic HAZE> 3.0 × Not suitable for practical use (9) Glossiness ·Evaluation method According to JIS-K7105, 60 degree specular gloss (GL
OSS,%) was measured. ·Evaluation criteria     Scale symbol Remarks GLOSS ≧ 130 ◎ Excellent gloss 120 ≦ GLOSS <130 ○ A level with no practical problem 110 ≦ GLOSS <120 △ Inferior level in the condition of light rays GLOSS <110 × Not suitable for practical use (10) Heat sealability ·Evaluation method Put 200 g of clay on a PP tray and fill
Wrapped in Lum sample. In that case, set the bottom of the tray
One part of the film, two parts that overlap, three parts overlap
Part and five overlapping parts were made. Temperature in advance
2 so that the bottom of the tray contacts the hot plate
And remove immediately after the film
The heat sealing state was observed. Temperature set in 5 ° C increments
And the lower limit temperature (T1:
Even if only one part is melt-ho
Temperature (T2: Heat seal upper limit temperature)
Difference with ΔT (° C.) = T2−T1 was determined. ·Evaluation criteria     Scale symbol Remarks ΔT> 50 ◎ Excellent heat sealability 40 <△ T ≦ 50 ○ Practically no problem 30 <ΔT ≦ 40 △ Level available under specific conditions △ T ≦ 30 × Not suitable for practical use (11) Impact resistance ·Evaluation method Toyo Seiki RDT-5000 / DART with thermostat
Using, the breaking energy ENG of the film (unit: J)
I asked. The type of dart is SMALL ALUMINI
UM DART (3.75kg), dirt diameter is 5/8
Inch (15.88 mmφ), maximum cell load is 100
Pounds (45.53 kgf), inner diameter of cradle is 2.5 inches
(63.5mmφ), 3.87m dart drop speed
/ Sec (fall height 76 cm). Measurement temperature is 15 ℃
And ·Evaluation criteria     Scale symbol Remarks ENG ≧ 0.5J ◎ Excellent impact resistance 0.2J ≦ ENG <0.5J ○ or higher, pass level 0.1J ≦ ENG <0.2J △ Film tears by impact ENG <0.1J × Film breaks by impact (12) Packaging ·Evaluation method With a sample film wound up to a film width of 380 mm
Evaluation of hand-packability and machine-packability
did. The machine uses Ishida's Wmini-Zero1
Was. The tray is SK-2 manufactured by Chuo Kagaku as standard tray.
0F, FP-18 LY-18-25 as a large tray,
GS-30-10C manufactured by FP Corporation as Sun Matley
For use, 300 g of clay was placed, and 10 pieces of each were packed. Standard tray (SK-20F) is compared in packaging
Is easy, but large trays (LY-18-25) are usually
Tray wrapped with a film with a film width of 400 mm or more
Wrapping, unless it is a film with excellent stretchability
A tray that is difficult to do. In addition, Sun Matley (GS
-30-10C) is a vertically long tray where packing wrinkles are likely to remain.
Leh. In the evaluation, film breakage occurred during packaging.
The film can be packed without wrinkles,
Observation was made to see if there was any debris. ·Evaluation criteria     Scale symbol Remarks All three trays were packed neatly ◎ Excellent packaging Two kinds of trays were packed neatly ○ Above, pass level Only one type of tray was packed neatly △ Same level as conventional film There was no tray that could be packed neatly × Not suitable for practical use (13) Anti-fog properties ·Evaluation method 200g of pork loin slices from PSP tray manufactured by Chuo Kagaku
-Put on FS-B5, wrap with each film sample,
Observed for 2 days in an open showcase at a temperature around 5 ° C
did. ·Evaluation criteria   Scale symbol Remarks Water film is uniform and the contents look beautiful ◎ Ideal for practical use Water film looks uneven when viewed closely ○ Above, practical level Content that looks distorted due to water droplets △ Not suitable for practical use Film that is cloudy due to water vapor and cannot be seen inside × Not suitable for practical use (14) Comprehensive evaluation ·Evaluation method Transparency, gloss, heat sealability, impact resistance, packaging,
Each item of anti-fogging property was comprehensively judged. ·Evaluation criteria     Scale symbol Remarks "◎" for all items ◎ Ideal for practical use All items are “◎” or “○” ○ Above, practical level At least one item with “×” or “△” × Not suitable for practical use [0044] EXAMPLES First, the polymer used in this example is shown below.
You. EVA1: ethylene-vinyl acetate copolymer [vinyl acetate
Content = 14% by weight, MI = 2.0 g / 10 min, melting point =
93 ° C] EVA2: ethylene-vinyl acetate copolymer [vinyl acetate
Content = 15% by weight, MI = 7.0 g / 10 min, melting point =
90 ° C] ・ TPO1: Propylene-ethylene block copolymer
[Heat of fusion = 34.3 J / g, Tpm = 164.7 ° C., T
im = 155.0 ° C., MFR = 0.8 g / 10 min (mon
Tel-JPO, Adflex KS-081P)] ・ TPO2: Propylene-ethylene block copolymer
[Heat of fusion = 36.6 J / g, Tpm = 165.1 ° C., T
im = 152.9 ° C., MFR = 30 g / 10 min (Monte
Le-JPO, Adflex KS-084P)] ・ TPO3: Propylene-ethylene block copolymer
[Heat of fusion = 61.9 J / g, Tpm = 139.0 ° C., T
im = 1117.degree. C., MFR = 6.0 g / 10 min (mon
Tel-JPO, Adflex C200F)] ・ TPO4: Propylene-ethylene block copolymer
[Heat of fusion = 23.7 J / g, Tpm = 154.8 ° C., T
im = 142.9 ° C., MFR = 1.5 g / 10 min.
Yamaha, P.S. E. FIG. R ・ R410E)] ・ TPO5: Propylene-ethylene block copolymer
[Heat of fusion = 13.9 J / g, Tpm = 153.0 ° C., T
im = 134.0 ° C., MFR = 1.5 g / 10 min.
Yamaha, P.S. E. FIG. R ・ T310J)] ・ TPO6: Propylene-ethylene block copolymer
[Heat of fusion = 84.7 J / g, Tpm = 164.8 ° C., T
im = 158.7 ° C., MFR = 20 g / 10 min (Chisso
Company, NEWCON / NK6120)] ・ TPO7: isotactic polypropylene and attack
Propylene homopolymer composed of tic polypropylene
[Heat of fusion = 77.5 J / g, Tpm = 162.9 ° C., T
im = 147.3 ° C., MFR = 4.5 g / 10 min (Idemitsu
Petrochemical Company, Idemitsu TPO F3900)] ・ TPO8: isotactic polypropylene and attack
Propylene homopolymer composed of tic polypropylene
[Heat of fusion = 67.3 J / g, Tpm = 159.3 ° C., T
im = 140.3 ° C., MFR = 2.5 g / 10 min (Idemitsu
Petrochemical Co., Idemitsu TPO E2700)] -TPO9: The above E2700 was peroxidized in an extruder.
The molecular weight has been reduced by adding
= 58.8 J / g, Tpm = 160.5 ° C., Tim = 1
41.6 ° C., MFR = 35 g / 10 min] ・ TPO10: isotactic polypropylene and ATA
Propylene homopolymerization with ctic polypropylene
Body (Idemitsu Petrochemical Company E2800) in the extruder
Low molecular weight by adding side.
[Heat of fusion = 61.6 J / g, Tpm = 160.4 ° C., T
im = 144.0 ° C., MFR = 75 g / 10 min] TPO11: 50% by weight of the following PP1 and propylene.
1-butene copolymer [density = 0.87 g · cm^Three, Melting
Viscosity (190 ° C) = 8000 cps (Ube Lexen,
APAO UT2780)] and 50% by weight of
Melted and kneaded at the output machine. PP1: propylene homopolymer [heat of fusion = 102.5
J / g, Tpm = 163.1 ° C., Tim = 154.2
° C, MFR = 4.0g / 10min (JPO, J-ALL
OMER PL500A)] ・ PP2: Propylene-ethylene random copolymer
[Heat of fusion = 111.7 J / g, Tpm = 150.4 ° C,
Tim = 140.0 ° C., MFR = 1.0 g / 10 min (J
PO, J-ALLOMER EG110)] -PB1: 1-butene-propylene-random copolymer
[Tpm = 72.5 ° C., Tim = 52.5 ° C., MI =
2.0 (Mitsui Chemicals, Tuffmer BL2281)] -PB2: 1-butene-ethylene-random copolymer
[Tpm = 97.9 ° C., Tim = 92.6 ° C., MI =
4.0 (Mitsui Chemicals, Tuffmer BL3450)] ・ PE1: Ethylene / 1-octene random copolymer
[Density = 0.868 gcm^Three, Tpm = 55.7 ° C.,
MI = 0.5 (Dow Chemical Company, ENGAGE EG8
150)] ・ PE2: ethylene / 1-octene random copolymer
[Density = 0.902 gcm^Three, Tpm = 98.0 ° C.,
MI = 3.3 (Dow Chemical, AFFINITY P
L1850)] ・ PE3: Ethylene / 1-octene random copolymer
[Density = 0.875 gcm^Three, Tpm = 67.1 ° C.,
MI = 3.0 (Dow Chemical Company, ENGAGE KC8)
852)] TPS: styrene-isoprene-styrene tribro
Of hydrogenated copolymer [styrene content = 20%, MFR
= 6g / 10min (Kuraray Co., Ltd., Hibler HVS-
3)] [0045] Example 1 As an H layer, 60% by weight of TPO1 and PB1
Of EVA1 as the S layer
To diglycerin oleate (RIKEN Vitamin, Riquemar
O-71D) and monoglycerin oleate (RIKEN Vitamin)
A 1: 1 mixture with Riquemar OL100).
Each layer was subjected to S / H / S (=
(30% / 40% / 30%) with a die lip diameter
Circular with 120mm and lip opening 1.2mm
It was extruded from the die at a discharge rate of 22.5 kg / hr.
While injecting air upward, inject air to
Speed 17.8m / min, blow-up ratio (BUR) =
Direct inflation molding at 3.0 times and thickness
A 15 μm film was obtained (Run. No. 1). The obtained film was evaluated by the method described above.
Was. [0047] Comparative Example 1 In Example 1, only TPO1 was used in the H layer.
(Run. No. 2), PB1 of H layer was changed to PE1
(Run.No.3), similarly replaced with TPS
(Run. No. 4)
The experiment was repeated. Further, only TPO11 was used for the H layer.
(Run. No. 5), TPO11: PB1 = 60: 4
0 (weight ratio) (Run. No. 6), etc.
The experiment similar to Example 1 was repeated. As described above, Run. No. 1 to Run. No.
Table 1 summarizes the results of No. 6. Using Table 1 below,
"Polypropylene-based polymer (A)"
= "Block PP" is "heat resistant and flexible"
Taking advantage of the characteristics, when the film is formed,
Explain that LUM can be obtained. First, Example 1, Ru
n. No. Film No. 1 is a film using the composition of the present invention.
And heat resistant, which is a feature of block PP.
Heat-sealing properties and packaging utilizing the characteristics of "soft and flexible"
Excellent transparency, transparency (HAZE = 1.8%) and gloss
(GLOSS = 130%)
Was. On the other hand, Run. No. 2 Phil
The heat-resistant layer (H layer) is a poly-1-butene-based polymer
(B) is a layer containing only the block PP, and has transparency.
(HAZE = 3.8%) and gloss (GLOSS = 10)
5%). Also, a poly-1-butene polymer
(B) Instead of very low density ethylene / 1-octene
Run. Using a polymer (PE1). No. Film 3
Also has transparency (HAZE = 5.2%) and glossiness (GLOS
S = 95%), which is more than the block PP alone.
The optical characteristics were poor. Further, the poly-1-butene polymer (B)
Instead, water of styrene and conjugated diene block copolymer
Run. No. Film 4 has optical properties
Was at the same level as the film of the present invention, but the impact resistance was
Inferior and, as a result, poor packaging. Run. N
o. 5 and Run. No. 6 instead of block PP
Amorphous and flexible with polypropylene homopolymer (PP1)
Mechanically melt-blended with APAO resin
(TPO11). Run. N
o. 5 is a block PP single use (Run No. 2);
Run. No. 6 is a block of poly-1-butene based on block PP
Blend of polymer (B) (Run No. 1)
Corresponding to A clear comparison between the two cases is clear.
In the case of simple polymer blend, block P
It can be seen that characteristics like P cannot be exhibited. [0052] Embodiment 2 In Embodiment 1, TPO1 and PB in the H layer
1 was sequentially changed to 75% by weight / 25% by weight (R
un. No. 7), changed to 20% by weight / 80% by weight
(Run. No. 8) The same experiment as in Example 1 was repeated except for the above.
I returned. [0053] Comparative Example 2 In Example 1, TPO1 and PB in the H layer
1 and 80% by weight / 20% by weight (R
un. No. 9), changed to 15% by weight / 85% by weight
(Run No. 10) The same experiment as in Example 1 was repeated.
I returned. As described in Run. No. 7 to Run. No. 1
Table 2 summarizes the results of 0. Hereinafter, the polypropylene polymer (A) 10
0 parts by weight of poly-1-butene-based polymer (B)
The necessity of 0 to 400 parts by weight will be described. Ru
n. No. 7 and Run. No. 8 is the invention
Is a film using the composition of the above for the H layer.
At the pass level. On the other hand, Run.
No. The film of No. 9 is made of a polypropylene polymer (A).
Poly-1-butene polymer (B) based on 100 parts by weight
Is 25 parts by weight, and therefore, the transparency (HAZE = 3.
0%), optical properties such as glossiness (GLOSS = 110%)
And the above-mentioned poly-1-butene-based polymer (B)
It can be seen that the effect of blending is not exhibited. Run. No. 10 film is polyp
100 parts by weight of the propylene polymer (A) is
When the 1-butene polymer (B) is 566 parts by weight in excess,
The heat resistance characteristic of the propylene-based polymer (A)
Toseal upper limit temperature T2 = 130 ° C) and flexibility (shock resistance)
It can be seen that sex cannot be used. From the above, poly
Poly-to 100 parts by weight of propylene-based polymer (A)
1-butene-based polymer (B) is 30 to 400 parts by weight.
We understand the need. [0056] Third Embodiment In the first embodiment, the TPO1 in the H layer is replaced with TP
O4 (Run. No. 11) and TPO7
(Run. No. 12)
The experiment was repeated. [0057] Comparative Example 3 In Example 1, TPO1 in the H layer was replaced with TP
O5 (Run. No. 13) and TPO6
(Run. No. 14), and similarly to TPO3
(Run. No. 15), also replaced with PP2
(Run No. 16) An experiment similar to that of Example 1 was repeated.
I returned. As described above, Run. No. 11 to Run. N
o. Table 3 summarizes the results of the 16 samples. Below, polyp
The heat of fusion of the propylene polymer (A) measured by DSC
With a melting peak temperature (Tpm) of 15 to 80 J / g,
The necessity of being at least 0 ° C. will be described. Run. No. 11 and Run. No. 1
2 is a film using the composition of the present invention for the H layer,
The evaluation was excellent. In particular, Tpm-Tim is 15.6.
C. Run. No. 12 is HAZ
Performed direct inflation molding with E = 1.5%
Run. No. Excellent transparency among 1-16
Was. On the other hand, Run. No. 13 Phil
The heat of fusion of the polypropylene polymer in the H layer was 13.
9 J / g (The heat of fusion for the entire film is 3.3 J / g
g) and heat sealing properties (T2
= 130 ° C). Run. No. 14 of
The film has a heat of fusion of the polypropylene polymer in the H layer.
84.7 J / g, which is large, so that the soft component in the resin is
Because of the small amount, the resin itself has poor flexibility, resulting in breakage
The film was inferior in wrapping property due to small elongation. Further, Run. No. Fifteen films
The heat of fusion of the polypropylene polymer in the H layer is 61.9 J /
g is large and Tpm is low at 139 ° C
Again, the film has poor heat resistance, and the film is heat-sealing (T2
= 130 ° C). In addition, Run. No. 16
Is propylene-E as the polypropylene polymer in the H layer.
Film using styrene / random copolymer (PP2)
With a Tpm of 150 ° C. or higher and a heat of fusion of 111.7 J
/ G and using a copolymer with relatively excellent heat resistance
Nevertheless, heat sealability is a film using the resin of the present invention.
And transparency (HAZE = 2.2%), gloss
(GLOSS = 120%) and the optical properties of the resin of the present invention
It fell short of the film used. The heat of fusion was as high as 111.7 J / g.
Insufficient flexibility and poor packaging properties. Also
In order to improve heat sealability, reduce the ethylene content.
To increase Tpm and increase heat of fusion
If Run. No. More optical properties like film 6
Inferior film, and conversely optical properties and flexibility
Heat resistance is poor if ethylene content is increased to improve heat resistance
Only a good film, and there are no areas where both can be satisfied.
It is clear from this experiment that From the above, the polypropylene-based polymer
(A) has a heat of fusion of 15 to 80 J / g measured by DSC.
The melting peak temperature (Tpm) must be 150 ° C or higher.
It turns out that there is need. [0064] [Embodiment 4] A layer having an HLB of about 13
1.0% by weight of loxyethylene lauryl ester
C12 fat saturated in PE2 as M layer
Acid: C10 fatty acid: C8 fatty acid = 6: 2: 2 mixed fat
Ester of acid and diglycerin (HLB = about 6.5)
2.0% by weight was kneaded, and TPO2 was 6
0% by weight and 40% by weight of PB2 (Run. N
o. 17) Using 3 extruders to melt and knead each
The die lip diameter is 200mm and the lip opening is 1.1m
m / S / M / H / M / S (=
10% / 25% / 30% / 25% / 10%)
And extruded at a discharge rate of 15.0 kg / hr.
Water at a temperature of 20 ° C is discharged from the lip to quench and cool the laminate.
Into a tubular raw material, fold it and take it
Was. At this time, the HLB used for the S layer is approximately
13% polyoxyethylene lauryl ester 10% water
The solution was sealed. The tubular raw material (having a thickness of about 140 μm)
Atmosphere while injecting air again and rotating with a twister
More air is blown through the furnace at a temperature of about 120 ° C
Formed a bubble. Stretch ratio is vertical
(MD) is 4.2 times, transverse direction (TD) is 3.1 times, and
The thickness of the film was 11 μm. On top of the resulting film
The evaluation method was as follows. Similarly, the composition of the H layer was changed to TPO2: P
B2 = 40: 60 (weight ratio) (Run.N
o. 18), the composition of the H layer was TPO8: PB2 = 40:
60 (weight ratio) (Run. No. 19),
The composition of the H layer was prepared by adding TPO9: PB2 = 40: 60 (weight
Ratio (Run. No. 20), TP of H layer
O10: PB2 = 40: 60 (weight ratio)
(Run. No. 21), the layer configuration was S / M / H
/ M / S = 10% / 20% / 40% / 20% / 10%
Other than that, the same experiment was repeated. As described in Run. No. 17-Run. No.
Table 4 summarizes the results of Example 21. Run. No. 17
Of Run. No. Clearer than film 1
(HAZE = 1.2%), gloss (GLOSS = 13)
5%). Run. N
o. Film 1 is wrinkled when performing hand wrapping.
Had to be pulled hard to remove
Is Run. No. The film of Run. No. 1
The wrinkles of the film were easily removed as compared with the film of No.
Excellent balance between MD and TD of film tear strength.
Excellent cutting performance with the cutting blade in the packaging machine
Was few. Furthermore, the antifogging property was also excellent. Run. No. 19 and Run. No. 20
In comparison with Run. No. 20 is Run. N
o. Polypropylene polymer having MFR greater than 19
(A) is used, MD elongation at break or tearing of the film
The film had high strength and excellent packaging properties.
In addition, Run. No. 18 and Run. No. Comparison with 21
In Run. No. Polypropylene polymerization of 18
The body (TPO2) has Tpm-Tim = 12.2 ° C.,
Run. No. 21 is 16.4 ° C. Tpm-Tim is greater than 16.4 ° C.
Run. No. The film of 21 is HAZE
= 0.8%, GLOSS = 142%, Run. No.
HAZE of the film No. 18 = 1.8%, GLOSS = 1
Compared with 30%, both transparency and glossiness were remarkably excellent. Ma
In addition, Run. No. 19
And 20 films had HAZE = 0.7%, GLOSS
= 147%, which was further excellent in both transparency and glossiness. [0070] Embodiment 5 Embodiment 4, Run. No. At 20,
The resin of the S layer was changed to PE3 (Run No. 22).
The resin of the S layer was changed to PE2 as described above (Run.
3) Other than Example 4, Run. No. Experiment similar to 20
Was repeated. As described above, Run. No. 20, 22, and 23
Table 5 summarizes the results. Hereinafter, the film of the present invention
Both surface layers (S layers) are made of polio having a Tpm of 100 ° C. or less.
It is described that it is preferable to use a olefin resin.
I will tell. The Tpm of the resin of the S layer is Run. No. 22 is about
67 ° C and Run. No. 20 ° C or more compared to 90 ° C of 20
Low heat-sealability (lower heat seal temperature =
(75 ° C.). On the other hand, Run. No. 23 films
Indicates that the resin of the S layer has a high Tpm of about 98 ° C,
The properties slightly decreased. The S layer is made of ethylene-α-olefin.
Run. No. 22 is EVA in the S layer
A certain Run. No. Greater tear strength than 20
However, the antifogging property was poor. In addition, transparency is slight
Inferior (HAZE: Run. No. 20 = 0.7
%, Run. No. 22 = 0.9%). [0073] Embodiment 6 Embodiment 4, Run. No. At 21,
The H layer is composed of 40% by weight of TPO10, 22% by weight of PB2,
A set consisting of 13% by weight of EVA2 and 25% by weight of PE2
And the thickness ratio of the layer is S / M / H / M / S = 10%
/ 20% / 40% / 20% / 10%
The experiment was repeated (Run. No. 24). Next, in Example 4, Run. No. At 21
In the M layer, PE2 is 70% by weight and EVA is 15% by weight.
%, 6% by weight of TPO10 and 9% by weight of PB2
The composition was used, and the thickness ratio of the layer was S / M / H / M / S = 10
% / 30% / 20% / 30% / 10%
Example 4, Run. No. Experiment similar to 21 was repeated
(Run. No. 25). As described above, Run. No. 21, 24 and 25
Table 6 summarizes the results. In this experiment, the film
Considered a method of collecting and reusing (rework)
Things. Run. No. 21 performs no rework at all
If you do not know, Run. No. 24 is H layer, Ru
n. No. Reference numeral 25 denotes a case where rework is performed on the M layer.
Rework is about 20% by weight of the entire film
System is collected and reused (rework rate = 20%)
Experimented. Run. No. 24, Run. No. 2
Transparency (HAZE = 0.9%) and gloss compared to 1.
(GLOSS = 140%)
Evaluation results were obtained. Run. No. 25 is Run.
No. It is a film with excellent characteristics like 24.
Was. [0077] [Table 1][0078] [Table 2][0079] [Table 3][0080] [Table 4][0081] [Table 5][0082] [Table 6] [0083] According to the present invention, the conventional high impact,
High heat sealing, high display (specifically transparent
, Gloss, and anti-fog properties)
Flexible polyolefin resin composition with excellent heat resistance that can be applied
objectForMakes it much more usable than conventional films.
We can provide easy-to-use films. The present inventionthe filmFor stretch packaging
Not only for shrink packaging applications but also for other heat resistant and flexible
Needless to say, it is useful for applications that require flexibility.
not.

Claims (1)

(57) [Claims 1] A differential scanning calorimeter as a heat-resistant layer (H layer)
The heat of fusion measured by (DSC) is 15-80 J / g,
Polyp whose melting peak temperature (Tpm) is 150 ° C or higher
100 parts by weight of a propylene polymer (A) and poly-1-butene
Soft polymer comprising 30 to 400 parts by weight of a polymer (B)
Contains a polyolefin resin composition, and has both surface layers (S layers)
And the melting peak measured with a differential scanning calorimeter (DSC).
Temperature (Tpm) 100 ℃ or less polyolefin tree
A multilayer film for packaging, characterized by containing fat .