KR101672649B1 - Adhesive polypropylene resin composition applicable to multi layer film for packaging food - Google Patents
Adhesive polypropylene resin composition applicable to multi layer film for packaging food Download PDFInfo
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- KR101672649B1 KR101672649B1 KR1020150125297A KR20150125297A KR101672649B1 KR 101672649 B1 KR101672649 B1 KR 101672649B1 KR 1020150125297 A KR1020150125297 A KR 1020150125297A KR 20150125297 A KR20150125297 A KR 20150125297A KR 101672649 B1 KR101672649 B1 KR 101672649B1
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- block copolymer
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J123/00—Adhesives based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Adhesives based on derivatives of such polymers
- C09J123/02—Adhesives based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Adhesives based on derivatives of such polymers not modified by chemical after-treatment
- C09J123/10—Homopolymers or copolymers of propene
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J123/00—Adhesives based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Adhesives based on derivatives of such polymers
- C09J123/02—Adhesives based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Adhesives based on derivatives of such polymers not modified by chemical after-treatment
- C09J123/025—Copolymer of an unspecified olefine with a monomer other than an olefine
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J123/00—Adhesives based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Adhesives based on derivatives of such polymers
- C09J123/02—Adhesives based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Adhesives based on derivatives of such polymers not modified by chemical after-treatment
- C09J123/04—Homopolymers or copolymers of ethene
- C09J123/06—Polyethene
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- C09J7/021—
Abstract
An adhesive resin composition to be applied to a multilayer film laminate made of a polyolefin, in particular, a polyethylene / polypropylene, particularly an adhesive resin composition excellent in interlaminar adhesive strength even after undergoing a change with time at a high temperature or a low temperature. The present invention relates to a polypropylene resin composition comprising 30 to 65% by weight of a polypropylene resin; 30 to 65 wt% of a polyethylene resin polymerized using a metallocene catalyst; 2 to 20% by weight of an olefin block copolymer; And 0.05 to 1% by weight of an antioxidant. The present invention also provides an adhesive resin composition for a multilayer film.
Description
The present invention relates to an adhesive resin composition for a multilayer film, and more particularly, to an adhesive resin composition for improving a peeling phenomenon by improving interlayer adhesive force in the production of a film having a multilayer structure of polyethylene / polypropylene.
The multilayer film means a composite film in which films of different kinds are laminated for the purpose of making the polymer resin film multifunctional. For example, a multilayer film that combines excellent mechanical properties of polyethylene and print smoothness of cellophane, or a multilayer film of nylon and vinyl alcohol-ethylene copolymer or the like is used as a packaging material.
A variety of adhesive components are known for bonding various polymer resins, metal layers such as aluminum, etc., applied to such multilayer films. However, the previously known adhesive components for a multilayered film have problems such as insufficient adhesion, low air and moisture barrier properties or mechanical properties, low flexibility or elasticity, low adhesive strength due to repeated deformation, And the like. In recent years, multilayer films have been produced by a co-extrusion method. If the adhesive component is not sufficiently flexible or elastic, a uniform adhesive layer can not be formed during the co-extrusion process, or sufficient adhesion or mechanical properties can not be secured Respectively.
On the other hand, in the field of film applications in which the properties of polyethylene and polypropylene are required at the same time, a multilayer film in which polyethylene and polypropylene are co-extruded is produced. However, since the polyethylene and polypropylene layers have low compatibility with each other due to their low compatibility with each other and the cohesion after co-extrusion is problematic, the cohesion is lower than the co-extrusion method, but the adhesion by dry lamination It is coming.
There has been reported a technique of increasing the adhesion between the polyethylene / polypropylene multilayer films by adding a certain amount of high-density polyethylene to each of the low-density polyethylene and the polypropylene, but a process of blending the high-density polyethylene before the introduction of the raw material is required, The high-density polyethylene can be damaged by the added high-density polyethylene.
On the other hand, the present applicant has proposed an adhesive resin composition applied to a multilayer film laminate made of polyethylene / polypropylene in the prior patent application no. 2014-0156841. However, the adhesive strength at room temperature is excellent, but it is difficult to reliably adhere to the adhesive after a high temperature or low temperature change. That is, when the multilayer film of polyethylene / adhesive layer / polypropylene is stored at a high temperature or a low temperature or when it is exposed to a high temperature or a low temperature for a certain time or more, there is a problem that the adhesion between the respective layers is remarkably reduced.
Korean Patent Laid-Open Publication No. 2013-0137155 discloses a technique of increasing the adhesive strength by inserting a certain amount of high-density polyethylene into each of the polyethylene / polypropylene multilayer films in order to increase interlaminar adhesion. This patent relates to the direct adhesion between polyethylene / polypropylene layers without a tie layer, and for economical reasons, the use of an adhesive layer is eliminated, but the manufacture of a polyethylene / polypropylene multilayer film using an adhesive layer is still required to be.
Korean Patent Laid-Open Publication No. 2010-0025270 discloses a resin composition excellent in heat sealing performance by adding polypropylene to a polyethylene coating such as a ramen container. In particular, regarding application to a polyethylene / polypropylene multilayer film It is not mentioned.
Japanese Laid-Open Patent Publication No. 0666574 discloses a polyolefin resin composition composed of a propylene random copolymer and an ethylenic copolymer as an adhesive layer disposed between a layer containing a polypropylene resin and a layer containing a polyethylene resin However, when stored at a high temperature or a low temperature, there is a problem that the interlayer adhesive force is rapidly lowered.
The present invention relates to an adhesive resin composition for a multilayer film, which is applied to a multilayer film laminate made of a polyolefin, in particular, a polyethylene / polypropylene film, and more particularly to an adhesive resin composition excellent in interlaminar adhesive strength .
In order to solve the above problems, the present invention provides a polypropylene resin composition comprising 30 to 65% by weight of a polypropylene resin; 30 to 65 wt% of a polyethylene resin polymerized using a metallocene catalyst; 2 to 20% by weight of an olefin block copolymer; And 0.05 to 1% by weight of an antioxidant. The present invention also provides an adhesive resin composition for a multilayer film.
Wherein the polypropylene resin is at least one selected from the group consisting of homopolypropylene, a propylene / ethylene random copolymer, a propylene / ethylene block copolymer and an ethylene / propylene / alpha-olefin terpolymer To provide a resin composition.
The propylene / ethylene random copolymer has a density of 0.89 to 0.92 g / cm 3, a melt flow rate (MFR, 230 캜, 2.16 kg load) of 0.5 to 15 g / 10 min and an ethylene content of 2 to 3.5 wt% An adhesive resin composition for a multilayer film is provided.
Wherein the polyethylene resin polymerized using the metallocene catalyst has a density of 0.86 to 0.965 g / cm 3 and a melt flow rate (MFR, 190 캜, 2.16 kg load) of 1 to 15 g / 10 min. To provide a resin composition.
The olefin block copolymer may be at least one selected from the group consisting of a propylene / ethylene block copolymer, an ethylene / octene block copolymer, an ethylene / butene block copolymer, and an ethylene / An adhesive resin composition for a multilayer film is provided.
Wherein the olefin block copolymer has a density of 0.86 to 0.93 g / cm 3, a melt flow rate (MFR, 190 캜, 2.16 kg load) of 0.5 to 20 g / 10 min and an ethylene content of 1 to 30 wt% And an adhesive resin composition.
The present invention also provides an adhesive resin composition for a multilayer film, wherein the antioxidant is a phenol-based primary antioxidant or a phosphate-based secondary antioxidant.
Wherein the adhesive resin composition further comprises a tackifier in an amount of 0.1 to 10 wt%, wherein the tackifier is selected from the group consisting of aromatic petroleum resin, aliphatic petroleum resin, petroleum resin, hydrogenated petroleum resin, rosin acid, rosin ester resin , A hydrogenated rosin-based resin, a coumarone-indene resin, a terpene-based resin, a phenol-based resin, polybutene, and hydrides thereof. .
The adhesive resin composition for a multilayer film is characterized in that the resin composition has a peel strength of 0.3 kgf / 15 mm or more as measured by the following method.
[Measurement method of peel strength]
Layer film (PE / tie-resin / PP) as an adhesive layer resin (tie-resin) between polyethylene and polypropylene using a multilayer film molding machine (line speed 5 m / min) And the molded film was stored at 90 ° C for 10 minutes, and peel strength was measured at a peel rate of 100 mm / min according to ASTM D882.
According to the present invention, by including the polyethylene resin, the olefin block copolymer, the tackifier and the antioxidant, which are polymerized by using the polypropylene resin, the metallocene catalyst in an optimal range, the multi- It is possible to provide a multilayer film adhesive resin composition which exhibits excellent film properties such as excellent adhesion performance, appropriate flexibility and impact resistance even after undergoing a change with time at a high temperature or a low temperature.
Hereinafter, preferred embodiments of the present invention will be described in detail. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. Throughout the specification, when an element is referred to as "including " an element, it means that it can include other elements, not excluding other elements, unless specifically stated otherwise.
The present inventors have found that an adhesive layer material to be applied to a multilayer film laminate made of a polyolefin, in particular, a polyethylene / polypropylene, is excellent in adhesion between polyethylene / polypropylene layers, As a result, it has been found that a polypropylene resin, a polyethylene resin polymerized by using a metallocene catalyst, an olefin block copolymer, a tackifier, and an antioxidant are contained in an optimum range, And exhibits excellent film properties such as excellent adhesion performance, proper flexibility and impact resistance even after passing through the film.
Accordingly, the present invention relates to a polypropylene resin composition comprising 30 to 65% by weight of a polypropylene resin; 30 to 65 wt% of a polyethylene resin polymerized using a metallocene catalyst; 2 to 20% by weight of an olefin block copolymer; And 0.05 to 1% by weight of an antioxidant.
In the present invention, the polypropylene resin is not particularly limited, but is preferably used in the form of a copolymer such as homopolypropylene, propylene / ethylene random copolymer, propylene / ethylene block copolymer, ethylene / propylene / alpha-olefin terpolymer And more preferably a propylene / ethylene random copolymer may be used.
Such a polypropylene resin is contained in an amount of 30 to 65% by weight, preferably 35 to 55% by weight, more preferably 40 to 50% by weight based on the total resin composition in consideration of the adhesive strength between the substrate and the polyethylene- % By weight.
When a propylene / ethylene random copolymer is used as the polypropylene resin, the density is 0.89 to 0.92 g / cm 3, the melt flow rate (MFR, 230 ° C, 2.16 kg load) is 0.5 to 10 g / 10 min, By weight and 3.5% by weight.
In the present invention, when a polyethylene resin polymerized by using a metallocene catalyst is applied as an adhesive resin to a multilayer film laminate made of polyethylene / polypropylene in combination with the polypropylene resin and an olefin block copolymer described later, peeling at room temperature Not only the strength is excellent but also the deterioration of the peeling strength is minimized even when the film is stored at a high temperature or a low temperature so that the interlaminar adhesive strength which is much superior to the conventional one can be maintained.
The polyethylene resin polymerized using such a metallocene catalyst may preferably have a density of 0.86 to 0.965 g / cm 3 and a melt flow rate (MFR, 190 캜, 2.16 kg load) of 1 to 15 g / 10 min. More preferably, the melt flow rate (MFR, 190 占 폚, 2.16 kg load) of 2 to 10 g / 10 min is used in a density of 0.917 to 0.96 g / cm3. When a polymerized polyethylene resin is used using the metallocene catalyst in the above-mentioned density and melt flow rate range, it is suitable for improving the adhesion between polyethylene and polypropylene base. On the other hand, a copolymer resin with ethylene may be used. As the comonomer for copolymerization, propylene, butene, hexene, octene and the like are suitable.
The metallocene catalyst is not particularly limited, and a conventionally known catalyst may be used. Examples of the metallocene catalyst include titanocene, vanadocene, nickelocene, tantalocene, hafnocene, zirconocene, and molybdenocene. The polyethylene polymerized by using the metallocene catalyst has a molecular weight distribution narrower than that polymerized by the conventional Ziegler-Natta catalyst, so that it has excellent interlaminar adhesion even at a high temperature or a low temperature.
The polyethylene resin polymerized by using the metallocene catalyst is contained in an amount of 30 to 65% by weight, preferably 40 to 60% by weight, based on the total resin composition in consideration of the adhesive strength between the base material of the adhesive layer and the polypropylene base material, By weight, and more preferably 45 to 55% by weight.
In the present invention, the olefin block copolymer is used for improving compatibility between the polyethylene resin polymerized by using the metallocene catalyst and a polypropylene resin, particularly, a propylene / ethylene random copolymer, and preferably a propylene / ethylene block Ethylene / octene block copolymer, ethylene / butene block copolymer or ethylene / hexene block may be used, more preferably propylene / ethylene block copolymer may be used. In order to prevent deterioration of adhesiveness due to high temperature or low temperature aging through maximization of the improvement in compatibility, the density is 0.86 to 0.93 g / cm 3 and the melt flow rate (MFR, 230 캜, 2.16 kg load) is 1 to 30 g / 10 min More preferably a density of 0.86 to 0.90 g / cm 3 and a melt flow rate (MFR, 230 캜, 2.16 kg load) of 1 to 15 g / 10 min.
Such an olefin block copolymer is contained in an amount of 2 to 20% by weight, preferably 3 to 10% by weight, more preferably 3 to 10% by weight based on the total resin composition in consideration of the adhesive strength between the substrate of the adhesive layer, 7% by weight.
In the present invention, the antioxidant can minimize the browning phenomenon due to deterioration in the compounding process of the components of the adhesive resin composition, minimize the phenomenon of gel generation, change in melt index (MI), and improve the product quality . In the present invention, a phenol-based primary antioxidant or a phosphate-based secondary antioxidant may be used as the antioxidant, and IRGANOX 1010 or NA-11KY may be used, for example.
Such an antioxidant is contained in an amount of 0.05 to 1% by weight, preferably 0.1 to 0.8% by weight, more preferably 0.1 to 0.5% by weight, based on the total resin composition in consideration of the adhesive strength between the base material of the adhesive layer and the polypropylene base material, % Can be included.
In the present invention, the adhesive resin composition for a multilayer film not only has higher adhesiveness but also has a high flexibility and elasticity so that a tackifier can be added to the multilayer film in order to ensure high moldability in the process of producing a coextruded multilayer film . Examples of the tackifier include an aromatic petroleum resin, an aliphatic petroleum resin, a petroleum resin, a hydrogenated petroleum resin, rosin acid, a rosin ester resin, a hydrogenated rosin resin, a coumarone resin, a terpene resin, , Polybutene, and hydrides thereof may be used.
Here, the petroleum resin is a light yellow or blackish brown thermoplastic resin having a weight average molecular weight of 2,000 or less, which is obtained by polymerizing an unsaturated hydrocarbon in a high-temperature pyrolysis fluid such as naphtha, as an acid catalyst. The aromatic petroleum resin is a resin produced by using C9 oil as a main raw material among the oil produced in the olefin process during the naphtha cracking process, and has a softening point of about 80 to 150 ° C and a weight average molecular weight of about 600 to 1,500. The main component of the aromatic petroleum resin is a copolymer of styrene vinyltoluene,? -Methylstyrene, and indene. Also, the aliphatic petroleum resin is a resin prepared from C5 oil as a raw material among the oil produced in the olefin process during the naphtha cracking process, and has a softening point of about 70 to 100 ° C and a weight average molecular weight of about 800 to 2,000. The major component of the aliphatic petroleum resin is a copolymer of isoprene, piperylene-2-methylbutene-1, and the like. The aliphatic petroleum resin may comprise a petroleum resin prepared from dicyclopentadiene as a raw material. Further, the hydrogenated petroleum resin is a resin formed by adding hydrogen to the aromatic petroleum resin and the aliphatic petroleum resin, and the properties are colorless and transparent, and the overall stability, such as ultraviolet stability, is excellent. The hydrogenated petroleum resin may include a petroleum resin prepared from dicyclopentadiene as a raw material and added with hydrogen.
Such a tackifier may be contained in an amount of 0.1 to 10% by weight, preferably 0.5 to 5% by weight, more preferably 1 to 5% by weight, based on the total resin composition in consideration of the adhesive strength between the substrate of the adhesive layer and the polypropylene base material, 3% by weight.
The adhesive resin composition for a multilayer film according to the present invention may contain the polyethylene resin, the olefin block copolymer, the tackifier and the antioxidant polymerized by using the above-mentioned polypropylene resin, the metallocene catalyst, have. In addition, in order to realize higher elasticity and flexibility while securing higher adhesion and mechanical properties, the adhesive resin composition for a multilayer film is preferably a polypropylene resin, a polyethylene resin polymerized using a metallocene catalyst, an olefin block copolymer, And a reaction extrusion between the antioxidant and the antioxidant. Such a reaction extrudate can be obtained by reacting the above components. Specifically, the reaction extrudate may be formed by melt extruding the components at a temperature of 180 to 260 ° C. The reaction extrusion can be carried out using a twin screw extruder, and a polypropylene resin, a polyethylene resin polymerized using a metallocene catalyst, an olefin block copolymer and an antioxidant at a temperature range of 180 to 260 ° C The tackifier containing the petroleum resin having a low molecular weight may be introduced through a main feeder, and the tackifier may be introduced through a side feeder.
Conventionally, adhesive materials for multilayer films are mainly manufactured by using a solution method or the like. Such conventional adhesive materials are not suitable for mass production or have not sufficient moldability or flexibility, so that they are not suitable for the production process of a coextruded multilayer film There was a certain limit. On the other hand, the adhesive resin composition for a multilayer film according to the present invention includes the above-mentioned specific components and they are formed by reaction extrusion to form a composite. Thus, the adhesive resin composition for a multilayered film has excellent mechanical properties such as excellent adhesion, excellent flexibility and impact resistance It can be easily applied to various manufacturing processes such as a coextruded multilayer film manufacturing process while ensuring physical properties. The reaction extrudate can be obtained in the form of a film or the like in the form of a pellet which is easy to be molded.
Hereinafter, embodiments of the present invention will be described in detail so that those skilled in the art can easily carry out the present invention. However, the following examples are illustrative of the present invention, and the present invention is not limited to the examples described below.
Examples and Comparative Examples
(1) Production of adhesive resin composition for multilayer film
Each component was mixed with the composition (unit: wt%) shown in the following Table 1 and extruded at a temperature of 200 ° C by a 40 mm twin screw extruder to prepare an adhesive resin composition for a multilayer film.
(2) Production of multilayer film
Using the adhesive resin composition for multilayer films obtained in the above Examples and Comparative Examples, the resin composition was laminated to the adhesive layer resin (tie) between polyethylene and polypropylene using a multilayer film molding machine (line speed: 5 m / min) (PE / tie-resin / PP) was molded as a three-layer film. The operating conditions of the multilayer film molding machine are shown in Table 4 below.
EXTRUDER 1. TEMP, EXTRUDER 2. TEMP, EXTRUDER 3. TEMP means the temperature of the three extruders used to form the three-layer film using each of the three films. CY1 / CY2 / CY3 / AD1 means the part temperature of the cylinder inside the extruder. In the introduction part CY1, the temperature was set to 170 DEG C and lower than 250 DEG C, which is the temperature of the central part (CY3), in order to prevent melting at the inlet when the resin was supplied. FD1 / FD2 / DE1 / DE2 / DE3 is the temperature range of the extruder feed and die part, which is set equal to the temperature inside the extruder. The stirring speed and pressure applied in each extruder are shown in Table 3 below.
Experimental Example
Peel strengths of the films prepared in Examples and Comparative Examples were measured at a room temperature and 90 ° C for 10 minutes by applying a peel rate of 100 mm / min on the basis of ASTM D882, and the results are shown in Table 4 Respectively.
As shown in Table 4, according to the adhesive resin composition produced according to the embodiment of the present invention, it was confirmed that peel strength was excellent even at a room temperature or in a harsh environment when a peel rate of 100 mm / min was applied based on ASTM D882 And the effect is further improved when the tackifier is added.
In particular, when the conventional Ziegler-Natta polyethylene is used at a level of 1.1 kgf / 15 mm, more preferably at least 0.3 kgf / 15 mm, more preferably at least 0.5 kgf / 15 mm, and still more preferably at least 1 kgf / 15 mm, The peel strength is 5 times or more higher than that of the conventional method.
The preferred embodiments of the present invention have been described in detail above. It will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Accordingly, the scope of the present invention is defined by the appended claims rather than the foregoing detailed description, and all changes or modifications derived from the meaning, range, and equivalence of the claims are included in the scope of the present invention Should be interpreted.
Claims (9)
Wherein the polyethylene resin polymerized using the metallocene catalyst has a density of 0.86 to 0.965 g / cm 3 and a melt flow rate (MFR, 190 캜, 2.16 kg load) of 1 to 15 g / 10 min. Resin composition.
Wherein the polypropylene resin is at least one selected from the group consisting of homopolypropylene, a propylene / ethylene random copolymer, a propylene / ethylene block copolymer and an ethylene / propylene / alpha-olefin terpolymer. Resin composition.
Wherein the propylene / ethylene random copolymer has a density of 0.89 to 0.92 g / cm 3, a melt flow rate (MFR, 230 캜, 2.16 kg load) of 0.5 to 15 g / 10 min and an ethylene content of 2 to 3.5 wt% Adhesive resin composition for film.
Wherein the olefin block copolymer is at least one selected from the group consisting of a propylene / ethylene block copolymer, an ethylene / octene block copolymer, an ethylene / butene block copolymer and an ethylene / hexene block copolymer. Adhesive resin composition for film.
Wherein the olefin block copolymer has a density of 0.86 to 0.93 g / cm 3, a melt flow rate (MFR, 190 캜, 2.16 kg load) of 0.5 to 20 g / 10 min and an ethylene content of 1 to 30 wt% Adhesive resin composition.
Wherein the antioxidant is a phenol-based primary antioxidant or a phosphate-based secondary antioxidant.
Wherein the adhesive resin composition further comprises a tackifier in an amount of 0.1 to 10 wt%, wherein the tackifier is selected from the group consisting of aromatic petroleum resin, aliphatic petroleum resin, petroleum resin, hydrogenated petroleum resin, rosin acid, rosin ester resin , A hydrogenated rosin-based resin, a coumarone-indene resin, a terpene-based resin, a phenol-based resin, polybutene, and hydrides thereof.
Wherein the resin composition has a peel strength of 0.3 kgf / 15 mm or more as measured by the following method.
[Measurement method of peel strength]
Layer film (PE / tie-resin / PP) as an adhesive layer resin (tie-resin) between polyethylene and polypropylene using a multilayer film molding machine (line speed 5 m / min) And the molded film was stored at 90 ° C for 10 minutes, and peel strength was measured at a peel rate of 100 mm / min according to ASTM D882.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20100074233A (en) * | 2007-10-31 | 2010-07-01 | 듀폰-미츠이 폴리케미칼 가부시키가이샤 | Pressure-sensitive adhesive film or sheet |
| KR20140040520A (en) * | 2012-09-26 | 2014-04-03 | 롯데케미칼 주식회사 | Adhesive resin composition for multilayer film |
| KR20150062548A (en) * | 2013-11-29 | 2015-06-08 | 롯데케미칼 주식회사 | Low temperature heat-sealing properties of atactic-polypropylene resin composition |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20100074233A (en) * | 2007-10-31 | 2010-07-01 | 듀폰-미츠이 폴리케미칼 가부시키가이샤 | Pressure-sensitive adhesive film or sheet |
| KR20140040520A (en) * | 2012-09-26 | 2014-04-03 | 롯데케미칼 주식회사 | Adhesive resin composition for multilayer film |
| KR20150062548A (en) * | 2013-11-29 | 2015-06-08 | 롯데케미칼 주식회사 | Low temperature heat-sealing properties of atactic-polypropylene resin composition |
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