JP2001220488A - Resin composition and its laminate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a resin composition that has extrusion laminate suitability without pulling threads to a polypropylene adherend and has stabilized peel strength to a variety of sealing conditions and a laminated body thereof. SOLUTION: The objective resin composition is produced by formulating 1-100 mass parts of a high-density polyethylene resin to 100 mass parts of a polypropylene resin composition comprising a polypropylene block copolymer, a branched long chain-bearing homo- or block-copolymer polypropylene resin and a polypropylene block copolymer comprising ethylene or an α-olefin monomer or their block component. In another embodiment, the resin composition is produced by admixing 1-100 mass parts of the high-density polyethylene resin to 100 mass parts of the propylene resin composition including the polypropylene block copolymer and the branched long chain-bearing homo or block-copolymer polypropylene resin.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a resin composition having an easy-peeling property with respect to a container whose adherend is made of a polypropylene resin or a composite container of paper and a polypropylene resin, and a laminate thereof.

[0002]

2. Description of the Related Art In the field of food packaging, packaging forms, such as instant noodles, jellies, and yogurt, which are filled with contents, are increasing. Recently, HM
As the flow of R (Home Meal Replacement) becomes stronger, the number of trays that can be frozen and distributed and have heat resistance such as microwave ovens is gradually increasing. Typical examples of these containers are those made of thermoplastic resins such as polyethylene, polystyrene, expanded polystyrene, polypropylene resin, and polyester resin by using a manufacturing method such as injection molding or vacuum compression molding. In particular, containers made of polypropylene have been widely used in terms of heat resistance and moisture resistance.Recently, in consideration of resource saving and environmental issues, paper trays combining paper and polypropylene film, etc. Because of the increasing tendency to use, a sealant capable of bonding to an adherend such as polypropylene has also been required for a laminate such as a cover material.

[0003] In general, a laminate for these containers is provided with a lid member in consideration of the protection of the contents and easy opening at the time of opening. The sealant layer of these lid materials is required to have a contradictory function of having an easy-opening property when opened, while having a strong adhesiveness to an adherend for protecting the contents. In order to satisfy such requirements, various functions have been given to the lid material. One of them is the design of an easy-opening mechanism, examples of which include an interface peeling type, an interlayer peeling mechanism, and a cohesive peeling mechanism.

[0004] The current easy peel sealants having easy opening properties, particularly the cohesive peel type sealant, are designed by a special alloying technique for polymers. Such precisely controlled polymer alloys may greatly differ in peeling behavior depending on the film forming conditions. For forming these easy peel sealants into films, the film forming conditions are very narrow. (If it deviates from ideal film forming conditions, defects such as stringing will occur.)

In view of these problems, in order to realize the functionality of the easy peel sealant, a film formed under optimum conditions by a technique such as inflation molding has been supplied. However, such a film becomes a very expensive film due to the additional processing cost in addition to the special resin obtained by special alloying technology.

[0006] In order to reduce defects such as stringing, a film having such an easy peeling property is formed by forming a film with an easy peeling layer as thin as possible (10 μm or less) by a co-extrusion technique. It is supplied as a film, but when peeling is performed under the optimum sealing condition with the adherend by thinning the easy peel layer, it has easy peeling, but the peeling surface is performed at the extremely thin part of the sealant layer Therefore, in spite of the fact that it actually has adhesion, it has a sense of anxiety about the adhesion sensuously. Furthermore, under the condition that the sealing pressure is very strong in the sealing condition, the thin easy peel layer is crushed, and the adherend and the support layer of the co-extruded film are adhered to each other. No longer show any gender).

In terms of converting, rather than supplying such an easy peel film,
At present, it is desired to form a film by an extrusion lamination technique that can reduce costs. However, polypropylene resin is basically not suitable for extrusion lamination processing, and recently, polypropylene resin capable of the extrusion lamination method has been supplied. However, a cohesive peeling type sealant which is an incompatible polymer alloy has been supplied. When a film is formed, poor workability such as a dropping phenomenon (draw resonance) and an increase in neck-in are involved.

As described above, in recent years, various containers using a polypropylene resin have appeared, and the market demands a sealant having an easy peel property while being strongly bonded to an adherend thereof. In addition, functionally, in addition to the problem of stringing, not only has a stable peel strength under various sealing conditions, as a converting standpoint, it is suitable for extrusion lamination There is a demand for a resin composition having easy peelability and a laminate thereof.

[0009]

DISCLOSURE OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is possible to extrude a polypropylene resin-coated article without stringing while maintaining the suitability for extrusion lamination. It is an object of the present invention to provide a resin composition having a stable peel strength even under sealing conditions and a laminate thereof.

[0010]

Means for Solving the Problems The present invention has been made to overcome the above-mentioned problems. That is, the present invention is directed to a polypropylene block copolymer and a homo- or block copolymer having a long-chain branch. A resin composition obtained by mixing a high-density polyethylene resin with a propylene-based resin composition comprising a polymer polypropylene resin and a polypropylene block copolymer comprising a block component of ethylene or α-olefin alone or both. And the mixing ratio of the density polyethylene resin is 1 to 10 with respect to 100 parts by mass of the propylene-based resin composition.
A resin composition satisfying the range of 0 parts by mass.

[0011] The invention according to claim 2 is that a high-density polyethylene resin is mixed with a propylene-based resin composition comprising a polypropylene block copolymer and a homo- or block copolymer polypropylene resin having a long chain branch. A resin composition, wherein the mixing ratio of the density polyethylene resin satisfies a range of 1 to 100 parts by mass with respect to 100 parts by mass of the propylene-based resin composition. It is.

According to a third aspect of the present invention, there is provided the resin composition according to the first aspect, wherein the content of the polypropylene or block copolymer of the ethylene or α-olefin alone or both is contained in the propylene-based resin composition. Is 5 to the entire propylene-based resin composition.
-20% by mass.

The invention described in claim 4 is the first or third invention.
In the resin composition described above, the flexural modulus of the polypropylene block copolymer comprising the ethylene or α-olefin alone or both block components is 200 to 200.
It is characterized by satisfying the range of 500 MPa.

According to a fifth aspect of the present invention, in the resin composition according to any one of the first to fourth aspects, the polypropylene block copolymer is a resin A, and the homo- or block copolymer having the long-chain branch is The polypropylene is referred to as resin B, and the high-density polyethylene resin is referred to as resin D. The respective melt viscosities are measured at a temperature of 2 using a capillary viscometer.
70 ° C., shear rate is defined as the melt viscosity (log [eta) in the range of ^{10 1 ~10 2 (1 / sec} ), satisfy each of the melt viscosity logη _A, logη _B, the following relationship when the log [eta _D It is characterized by the following. (Log η _A ) / (log η _D ) = 0.75 to 1.25 (log η _B ) / (log η _D ) = 0.75 to 1.25

According to a sixth aspect of the present invention, there is provided a sealant layer comprising the resin composition according to any one of the first to fifth aspects, wherein the thickness of the sealant layer satisfies a range of 5 μm to 40 μm. It is a laminated body.

According to a seventh aspect of the present invention, in the laminate according to the sixth aspect, when the laminate is sealed to an adherend via a sealant layer, the peel strength of the sealant layer with respect to the adherend is zero. It is characterized by satisfying the range of 0.5 to 2 N / 15 mm and having a peel strength fluctuation of 0.5 N / 15 m or less in a sealing temperature range of at least 30 ° C. or more.

The invention according to claim 8 is the invention according to claim 6 or 7.
In the laminate described above, the adherend is a polypropylene resin container or a composite container of paper and polypropylene resin.

The invention according to claim 9 is the invention according to claim 6 or 7.
The laminate described above is characterized in that the laminate is used as a soft packaging material having a sealant layer.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail. The resin composition of the present invention comprises a polypropylene block copolymer, a homo- or block copolymer polypropylene resin having a long-chain branch, and a polypropylene block copolymer comprising ethylene or α-olefin alone or both block components. The propylene-based resin composition is a resin composition obtained by mixing a high-density polyethylene resin, and the mixing ratio of the density polyethylene resin is 1 to 100 parts by mass of the propylene-based resin composition. Further, the resin composition of the present invention is characterized by satisfying a range of 100 parts by mass, a propylene-based resin composition comprising a polypropylene block copolymer and a homo- or block copolymer polypropylene resin having a long-chain branch. Resin composition of high-density polyethylene resin mixed with product A is, and with respect to the propylene resin composition 100 parts by weight, the mixing ratio of the density polyethylene resin is 1 to 1
It is characterized by satisfying the range of 00 parts by mass.

Here, the polypropylene block copolymer is a resin layer serving as a base of the resin composition of the present invention.
Melt index (MI) at 30 ° C. is 0.1 to
100 g / 10 min, preferably 1 to 50 g / 10
, And more preferably a polypropylene resin which is a block copolymer with ethylene in the range of 10 to 30 g / 10 minutes.

The homo- or block copolymer polypropylene resin having a long chain branch is added for the purpose of improving the processability of the resin composition of the present invention. (Draw resonance)
It is indispensable for improvement of the neck-in. The polypropylene having this long chain branch was subjected to melt-kneading of a normal homo- or block polypropylene resin in the presence of a peroxide, and after extracting hydrogen with tertiary carbon of the polypropylene, a propylene chain was introduced. Having a structure. These long-chain branched polypropylene resins,
The homo-type or the block type described above may be used, but the block type is preferable.

The polypropylene block copolymer composed of ethylene or α-olefin alone or both block components has a flexural modulus of 200 to 500 MPa, and a polypropylene resin containing ethylene or α-olefin alone or both block components ( Block copolymer), and is added according to the application in which impact resistance is required as a resin composition. The addition amount of the polypropylene block copolymer composed of the block components of ethylene or α-olefin alone or both contained in the propylene-based resin composition is in the range of 5 to 20% by mass based on the entire propylene-based resin composition. desirable. Examples of these are propylene-ethylene copolymer, propylene-
Examples thereof include a butene copolymer, a propylene-butene-ethylene copolymer, and a propylene-high-α-olefin (HAO) copolymer.
It is effective that the range is from 00 to 500 MPa in terms of flexibility and impact resistance.

The high-density polyethylene resin plays the role of a phase that triggers cohesive peeling of the cohesive peeling type easy peel sealant, and the above-mentioned polypropylene block copolymer, homo- or block copolymer polypropylene resin having long chain branches, Resins which are incompatible with either a single block of ethylene or α-olefin or a block copolymer of polypropylene comprising both block components are preferred. There are various types of resins that are incompatible with the polypropylene resin.Ethylene resins are cited in terms of workability described below, and low-density polyethylene, medium-density polyethylene, high-density polyethylene, and ethylene-α-olefin copolymer are exemplified. However, the resin is not limited to these simple substances, and a blend of these resins may be used as needed. Particularly, high-density polyethylene is preferable.

The characteristics of this resin composition in terms of improving the suitability for extrusion lamination include the following. The first point is that a polypropylene resin having a long chain branch is introduced. In general, polypropylene resin does not have long-chain branching, so that the melt tension of a molten film is small, and as a result, a neck-in or dropping phenomenon occurs. In such a sense, by blending the polypropylene resin into which the long-chain branch is introduced, the melt tension of the entire system is improved, and the suitability for extrusion lamination is remarkably improved.

The second point is that in order to generally improve the mechanical and other physical properties of the propylene-based polymer alloy, it is necessary to add some compatibilizing agent, In the case of a system polymer alloy, the processability tends to be significantly reduced. However, although the details of the combination of the block polypropylene resin and the high-density polyethylene are unknown, it is possible to improve the workability without adding a compatibilizer, and the ethylene unit of the block type polypropylene resin can be improved. It is presumed that the improvement in affinity between high-density polyethylene resulted in an improvement in workability.

The third point is the melt viscosity balance. In the present invention, a capillary viscometer is used to measure the temperature of 27.
0 ° C., a polypropylene block copolymer obtained by a shear rate range of 101 to 102 (1 / sec) is a resin A,
The homo- or block copolymer polypropylene having a long-chain branch is represented by resin B, and the high-density polyethylene resin is represented by resin D. The ratio of the melt viscosities (log η) of resin A, resin B and resin D has the following relationship. When these ranges are exceeded, the viscosity balance of the polymer alloy is lost and the processability is significantly reduced. The viscosity balance also affects the easy-openability described below. (Log η _A ) / (log η _D ) = 0.75 to 1.25 (log η _B ) / (log η _D ) = 0.75 to 1.25

These resin compositions may contain low molecular weight petroleum resins, if necessary, such as aliphatic petroleum resins, aromatic petroleum resins, copolymer petroleum resins, alicyclic petroleum resins, rosin, Polymerized rosin, hydrogenated rosin, rosin glycerin ester, and hydrogenated or polymer thereof, rosin such as rosin pentaerythrole and its hydrogenated or polymerized rosins as a tackifier is blended with the resin in an appropriate amount. It does not matter, furthermore, in consideration of workability, thermal stability, etc., antioxidants, stabilizers, lubricants, antiblocking agents, antistatic agents, cloud inhibitors, adhesion regulators, fillers, coloring agents, etc. It is also possible to add additives.

Specific examples of the laminate using the resin composition of the present invention as a sealant include: Example 1) paper layer / thermoplastic resin layer (intermediate layer 1) / aluminum foil layer / thermoplastic resin layer (intermediate layer 2) / Resin composition layer of the present invention Example 2) Thermoplastic resin layer (outermost layer) / paper layer / thermoplastic resin layer (middle layer 1) / thermoplastic resin layer (middle layer 2) / thermoplastic resin (middle layer 3) Example 3) Paper layer / thermoplastic resin (middle layer 1) / thermoplastic resin (middle layer 2) / resin composition layer of the present invention Example 4) Paper layer / thermoplastic resin Middle layer 1) / thermoplastic resin (middle layer 2) / thermoplastic resin (middle layer 3) / resin composition layer of the present invention Example 5) thermoplastic resin layer (outermost layer) / thermoplastic resin layer (middle layer 1) ) / Resin composition layer of the present invention. At this time, the layer configuration is not limited to the above configuration and may be any number of layers, and as the outermost thermoplastic resin layer, a polyethylene terephthalate film, a polyamide film,
Stretched polypropylene films and the like can be mentioned. As the thermoplastic resin intermediate layer, polyethylene resin, polypropylene resin, ethylene-α-olefin copolymer, polyester resin, polyamide resin, etc., and not only these alone, but also various blends may be used. A barrier resin layer such as an alcohol copolymer or polyvinyl alcohol, an adhesive resin layer such as an ethylene-α, β unsaturated carboxylic acid copolymer, an acid anhydride-modified polyolefin resin, an adhesive layer such as a urethane-based or imine-based A coating layer and an ink layer may be interposed. Further, in a configuration in which paper is stacked, the material of the paper is not particularly limited. Further, a film in which an inorganic compound is laminated by a method such as vapor deposition to impart a barrier property can also be used. FIG. 1 is a cross-sectional view showing an example of the configuration of the laminate of the present invention. This is an example of a configuration comprising a thermoplastic resin layer 1 / adhesive layer 2 / thermoplastic resin layer (intermediate layer) 3 / resin composition (sealant layer) 4 of the present invention.

The method for producing the entire laminate is not particularly limited, and the laminate can be produced by utilizing various lamination methods such as ordinary extrusion lamination and dry lamination. Further, as a film forming method of the resin composition of the present invention, a film is formed mainly by using an extrusion lamination method, in which case, a polypropylene block copolymer and a homo- or block copolymer having a long-chain branch. Directly blended dry blended polypropylene resin, polypropylene block copolymer consisting of ethylene or α-olefin alone or both block components, and high-density polyethylene resin with various blenders such as tumbler mixer, ribbon mixer, and Henschel mixer. A polypropylene block copolymer and a homo- or block-copolymer polypropylene resin having a long-chain branch, and a film formed by a screw extruder or a kneader such as a twin-screw extruder or a Banbury mixer. Or block of α-olefin alone or both After preparing a compound of the polypropylene block copolymer comprising the components and the high-density polyethylene resin, a film may be formed by a single screw extruder. As a method for forming a film, an extrusion lamination method using a T-die is preferable. However, a film formed using a technique such as inflation or casting may be bonded to a substrate in a separate step. At that time, depending on the processability, a film may be formed by coextrusion with various resins. In the case of co-extrusion, the co-extrusion support layer may be a general-purpose extrusion grade polypropylene resin or a density of 0.8 obtained with a single-site catalyst.
It is possible to use an ethylene-α-olefin copolymer elastomer or plastomer in the range of 50 to 0.925 g / cm ³ . In forming a film, it is preferable to form the resin composition of the present invention in a range of 5 to 40 μm, preferably 10 to 40 μm in consideration of easy peelability and processability.

These laminates may be subjected to various processes and treatments in separate steps or in-line. If necessary, various surface treatments such as corona treatment, flame treatment, and plasma treatment may be performed in order to improve the adhesion to the adherend. Processing such as processing may be performed. Also,
In consideration of the slip property, anti-blocking property and line suitability of the packaging material, embossing may be performed only on the inner surface of the sealant or on the entire laminate. Embossing is particularly preferred because it has an effect of eliminating stringing.

The embossing can be carried out by using various known techniques. However, in consideration of the omission between steps, embossing may be performed in-line by setting the cooling roll of the extrusion laminating machine to an embossing roll in advance. Although possible, the processing method is not particularly limited.

These laminates are used in the field of flexible packaging materials having a polypropylene resin container or a composite container of paper and polypropylene resin or a sealant layer.
As mentioned above, lid material (microwave container, cup,
It can be applied to various packaging materials such as a blister packaging material, a gazetta packaging material, a three- or four-sided sealing packaging material.

These peel strengths are 0.5 to 2 N / 15.
mm and preferably at least 30 mm.
The deviation of peel strength is 0.5N /
It is preferably 15 mm or less. The peel strength is 0.
If it is smaller than 5 N / 15 mm, the adhesion is inferior and 2 N / 15
If it exceeds mm, it does not show easy peelability. If the deviation of the peel strength exceeds 0.5 N / 15 m, the stability of the peel strength in the seal range will not be exhibited.

The above-mentioned three factors for improving the workability greatly affect the peeling behavior. First, by blending a polypropylene resin having a long-chain branch, the peel feeling becomes smooth, and a functionally favorable peel behavior is obtained. Although the details of this reason are also unknown, the incorporation of a polypropylene resin having a long-chain branch increases the degree of entanglement between the polymers, and this entanglement occurs when the base polymer undergoes cohesive failure during peeling. It is presumed that the natural peel feeling was improved. In addition, the "viscosity balance" and "block polypropylene / high-density polyethylene combination" both control the distribution of the matrix and domains, and as a result, the stringing behavior during opening and the increase in sealant layer thickness Is considered to have been improved. By raising the sealant layer,
It is also possible to show good peelability at various sealing pressures.

Examples of the present invention will be described below, but the present invention is not limited thereto.

Example 1 50% by mass of resin A selected from the following resin materials, 20% by mass of resin B-1 and 30% by mass of resin D were mixed, and a compound preparation method shown below was prepared. A laminate was produced by a laminate production method. [Resin material] Resin A: block copolymerized polypropylene resin (MI = 2
5 230 ° C.) Resin B-1: Block copolymerized polypropylene resin having a long chain branch (MI = 16 230 ° C.) Resin B-2: Homopolypropylene resin having a long chain branch (MI = 30 230 ° C.) Resin C: Polypropylene -High α-olefin (HAO)
Block copolymer (MI = 2.3 230 ° C.) Resin D: high-density polyethylene (MI = 8 230 ° C.) [Melt viscosity ratio] The melt viscosity of the above resins A, B and D is measured, and the melt viscosity ratio is measured. did. Melt viscosity measurement conditions: 270 ° C., shear rate range 10 ¹ to
10 ² (1 / sec) Capillary length: 10 mm, capillary diameter 1 mm, barrel diameter _{9.55mm logη A / logη D = 0.80~0.86} logη B - 1 / logη D = 0.90~0.92 logη _B - ₁ / log η _D = 0.80 to 0.83 [Compound preparation method] After a predetermined amount of resin is sufficiently dry-blended in advance with a tumbler mixer, the compound of these resin compositions is compounded by a twin-screw extruder. It was created. The processing temperature is 240 ° C. The kneaded molten sample was extruded into a strand and subjected to water-cooled pelletizing. [Laminate Forming Method] A raw material obtained by laminating a cast polypropylene (CPP) film (20 μm) on a biaxially stretched polyester film substrate (12 μm) by a two-component curable urethane dry lamination method was used. The above compound was laminated as a single film on the cast polypropylene of the raw material by an extrusion laminating method to form a laminate (FIG. 1). The processing temperature at that time is 270 ° C., and the processing speed is 70 m / min.
The extruded thickness of the resin composition at this time is 20 μm.

<Example 2> Resin A was 40% by mass, resin B was
-1 at 20% by mass, resin C at 10% by mass, resin D at 3%
The same as Example 1 except that the content was set to 0% by mass.

<Example 3> The same as Example 1 except that resin A was blended in 40% by mass, resin B-1 was blended in 20% by mass, and resin D was blended in 40% by mass.

<Example 4> The same as Example 1 except that the resin A was blended in 50% by mass, the resin B-2 in 20% by mass, and the resin D in 30% by mass.

<Example 5> The same as Example 1 except that resin A was 40% by mass, resin B-2 was 20% by mass, resin C was 10% by mass, and resin D was 30% by mass.

Table 1 shows the evaluation results of the peel strengths of the laminates obtained in Examples 1 to 5 measured by the following peel strength measuring method. [Peeling strength] The following two methods were used for measuring the peeling strength. (1) A sample was prepared by heat-sealing the above-mentioned laminate with the above-mentioned raw material. Seal temperature is 150
２００200 ° C., sealing pressure 19.6 × 104 Pa, time 1 sec. The sample is peeled at 300mm
/ Min., T-peeling, the peel strength and the presence or absence of stringing were confirmed. (2) A sample in which the above laminate was sealed face-to-face by the method shown in (1) was similarly measured for peel strength and checked for stringiness.

[0042]

[Table 1]

[0043]

According to the present invention, a polypropylene-based polymer alloy which has not been suitable for extrusion can be formed into a single film by modifying the structure of the base polypropylene, the modification by introducing long-chain branched polypropylene, and adjusting the melt viscosity ratio. It became possible to give good extrusion suitability. Sensitive easy-peeling properties that do not cause stringing on polypropylene resin adherends, provide stable peel strength even under various sealing conditions, and the peel feeling cannot be expressed numerically
(Very smooth). The resin composition of the present invention does not require a special alloying technology, so that cost reduction is achieved, and a tendency to increase the number of polypropylene-based containers in the future, and the emergence of composite containers with paper, etc. Yes, the laminate of the present invention, which has an easy peel property with respect to a polypropylene resin, is inexpensive, and easy to mold, can be advantageously used.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing an example of a laminate having a sealant layer made of a resin composition of the present invention.

[Explanation of symbols]

 1) thermoplastic resin layer (outermost layer) 2) adhesive layer 3 ... thermoplastic resin layer (intermediate layer) 4) resin composition layer (sealant layer)

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification code FI Theme coat ゛ (Reference) C08L 23/06 C08L 23/06 F term (Reference) 3E086 AD05 AD06 AD24 BA04 BA15 BB90 4F100 AK04A AK05A AK07A AK07C AK08A AK41 AK51G AL01A AL02A AL05A BA01 BA02 BA03 BA07 BA10A BA10C DG10C EH23 EH232 GB16 JA06A JK04A JK06B JL11B JL14 YY00A YY00B 4J002 BB03Z BB12X BP02W BP02X BP02Y BP03X BP03Y

Claims (9)

[Claims] 1. A propylene-based copolymer comprising a polypropylene block copolymer, a homo- or block copolymer polypropylene resin having a long chain branch, and a polypropylene block copolymer comprising ethylene or an α-olefin alone or both block components. For the resin composition,
A resin composition obtained by mixing a high-density polyethylene resin, and the mixing ratio of the high-density polyethylene resin is 1 to 100 parts by mass of the propylene-based resin composition.
A resin composition satisfying the range of 100 parts by mass. 2. A resin composition obtained by mixing a high-density polyethylene resin with a propylene-based resin composition comprising a polypropylene block copolymer and a homo- or block copolymer polypropylene resin having a long chain branch. And a mixing ratio of the density polyethylene resin to 100 parts by mass of the propylene-based resin composition satisfies a range of 1 to 100 parts by mass. 3. The propylene resin composition according to claim 1, wherein the content of the polypropylene block copolymer comprising ethylene or α-olefin alone or both block components is based on the entire propylene resin composition. The resin composition according to claim 1, which satisfies a range of 5 to 20% by mass. 4. The resin composition according to claim 1, wherein the flexural modulus of the polypropylene block copolymer comprising the ethylene or α-olefin alone or both block components satisfies the range of 200 to 500 MPa. object. 5. The polypropylene block copolymer is represented by resin A, the homo- or block copolymer polypropylene having a long-chain branch is represented by resin B, and the high-density polyethylene resin is represented by resin D. Using a capillary viscometer, at a temperature of 270 ° C and a shear rate of 10
^1-10 melt viscosity in the range ² (1 / sec) (log
η) and their respective melt viscosities are log η _A , lo
gη _B, the resin composition according to any one of claims 1 to 4, characterized by satisfying the following relationship when the log [eta _D. (Log η _A ) / (log η _D ) = 0.75 to 1.25 (log η _B ) / (log η _D ) = 0.75 to 1.25 6. A laminate having a sealant layer comprising the resin composition according to claim 1, wherein the thickness of the sealant layer satisfies a range of 5 μm to 40 μm. 7. When the laminate is sealed to an adherend via a sealant layer, the peel strength of the sealant layer with respect to the adherend satisfies the range of 0.5 to 2 N / 15 mm, and at least 30 ° C. 7. The laminate according to claim 6, wherein the deviation of the peel strength is 0.5 N / 15 m or less in the above-mentioned sealing temperature range. 8. The method according to claim 1, wherein the adherend is a polypropylene resin container,
The laminate according to claim 6 or 7, wherein the laminate is a composite container of paper and a polypropylene resin. 9. The laminate according to claim 6, wherein the laminate is used as a soft packaging material having a sealant layer.
The laminate according to the above.