WO2004020195A1 - ポリプロピレン系ラップフィルム - Google Patents
ポリプロピレン系ラップフィルム Download PDFInfo
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- WO2004020195A1 WO2004020195A1 PCT/JP2003/010797 JP0310797W WO2004020195A1 WO 2004020195 A1 WO2004020195 A1 WO 2004020195A1 JP 0310797 W JP0310797 W JP 0310797W WO 2004020195 A1 WO2004020195 A1 WO 2004020195A1
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- Prior art keywords
- film
- mass
- resin
- parts
- polypropylene
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
- B32B27/22—Layered products comprising a layer of synthetic resin characterised by the use of special additives using plasticisers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/702—Amorphous
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/704—Crystalline
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2323/00—Polyalkenes
- B32B2323/10—Polypropylene
Definitions
- the present invention relates to a film used for packaging an article such as a food packaging wrap.
- a film used for packaging an article such as a food packaging wrap.
- the brightness of a polypropylene wrap film that can maintain the quality that the adhesiveness and the drawability do not change even after a certain period of time.
- Thin films made of thermoplastic resin have been used in restaurants, food stores, and households when storing food and heating it with a microwave oven.
- wrap films made of vinylidene chloride-based copolymer resin have excellent properties such as moisture proof, oxygen gas barrier, heat resistance, adhesion to containers, transparency, etc. It is often used as a wrap film.
- Japanese Patent Application Laid-Open No. H10-202086 proposes a self-adhesive wrap film in which a core layer is a polypropylene resin and a surface layer contains a surfactant as an adhesive.
- this technology can exhibit high adhesion. And it is difficult.
- the surfactant foams on the wrap film surface due to moisture. Attempts to increase the adhesion will increase the pull force, and conversely, lowering the pull force will decrease the adhesion.
- contradictory properties such as deterioration in stretchability when trying to increase the elastic modulus, which is an index of firmness, and it is extremely difficult to maintain a good balance of these properties. It is.
- Japanese Patent Application Laid-Open No. 2002-46238 proposes a multilayer film having a resin composition containing a core layer made of a resin having a pliability and an additive having adhesiveness as a surface layer.
- I have.
- additives for developing adhesion have a low molecular weight or a low glass transition point, and move in the film as called bleed-in. For this reason, even if a good balance between adhesion and extractability is maintained immediately after film formation, the additives existing in the surface layer move into the interior over time, resulting in a decrease in adhesion and extractability.
- the present invention is mainly as follows.
- a crystalline polypropylene resin (S 1) at least one selected from an amorphous or low-crystalline propylene- ⁇ -olefin copolymer and a ptene-11 polymer
- the hydrogenated terpene resin (S3) and the fat which is liquid at normal temperature are added to the first composition comprising 20 to 50% by mass of one type of softener (S2) and 100 parts by mass of the first composition in total.
- a surface layer (A) containing 5 to 15 parts by mass and 10 to 20 parts by mass of an aromatic hydrocarbon (S4), and 80 to 98% by mass of a crystalline polypropylene resin (C1).
- a core layer (B) containing 2 to 20% by mass of an aliphatic hydrocarbon (C 2);
- a polypropylene-based multilayer wrap film having:
- the above-mentioned polypropylene-based multilayer wrap finolem having a structure of not less than 100 nm and not more than 100 nm and having an average pore size of not less than 3 nm and not more than 1 xm.
- the present invention has the following effects.
- a resin composition in which a specific softener, a hydrogenated terpene resin, and a specific amount of an aliphatic hydrocarbon that is liquid at room temperature are used for the surface layer, the resin is appropriately plasticized, and the adhesiveness and the pull-out property are improved. Can be compatible.
- FIG. 1 is a photograph obtained by observing the wrap film of the present invention with a phase image of an atomic force microscope at a magnification of 40,000.
- the polypropylene resin used in the present invention has a propylene unit in the polymer molecular chain, and may be a homopolymer composed of only propylene unit or a binary or terpolymer with ethylene-butene-11 or the like. It may be.
- copolymers random copolymerization is preferred from the viewpoint of transparency.
- isotactic or syndiotactic structure or a mixture thereof may be used.
- the melt flow rate is more preferably in the range of l to 20 gZlO at a temperature of 230 ° C and a load of 2.16 kg in a method conforming to ASTM D1238. .
- the component used as a softening agent contained in the surface layer (A) is selected from amorphous or low-crystalline propylene-monoolefin copolymer and butene-11 polymer. From the viewpoint of safety, it is preferable that the product pass the standard for food packaging.
- the amorphous or low-crystalline propylene-olefin copolymer is a copolymer of propylene and a-olefin having 4 or more carbon atoms such as butene-11 and pentene-11.
- the propylene ratio is preferably from 65% by mass to 85% by mass.
- the amorphous or low-crystalline polypropylene- ⁇ -olefin copolymer includes, for example, Tuffmer XR of Mitsui Chemicals.
- the butene-11 polymer is a homopolymer obtained by catalytic polymerization of a liquid butene-11 monomer.
- the melt flow rate is preferably in the range of 0.1 to 5 gZlO in a method according to ASTM D1238 under a load of 1.90 kg and a load of 2.16 kg.
- the density in ASTM D 1505 is 0.904 to 0.92. Those with 0 g / 7 cm 3 are preferred.
- the above softener has good compatibility with the crystalline polypropylene resin, and when mixed in an appropriate amount, the tensile elasticity without significantly impairing the original transparency, moisture resistance and heat resistance of the crystalline polypropylene resin. This has the effect of reducing the modulus and flexural modulus, that is, the effect of imparting flexibility.
- the softener When the amount of these softeners is 100% by mass, including the crystalline polypropylene resin and the softener, the softener is used for the flexibility of the resulting film, the feel to the touch, and the ability to follow the shape of the envelope. It is at least 20% by mass from the viewpoint of the above, and is at most 50% by mass from the viewpoints of stable film forming property, processability, appearance and quality of the product, firmness, and usability of the packaging film. The content is more preferably 20 to 40% by mass, and still more preferably 20 to 30% by mass.
- the hydrogenated terpene resin further contained in the surface layer (A) is used as an adhesive.
- the hydrogenated terpene resin is a homopolymer obtained from pine bark, citrus fruit bark, etc., ⁇ -pinene, lpinene, limonene, dipentene, etc., or a hydrogenated product of these copolymers. It is.
- the softening point of the hydrogenated terpene resin is preferably at least 120 ° C from the viewpoint of the stickiness of the film and the like, and is preferably at most 135 ° C from the viewpoint of the flexibility and adhesion of the surface layer (A) in which it is blended. preferable.
- the hydrogenated terpene resin has a composition of 100 parts by mass of the above-mentioned crystalline polypropylene resin and a softening agent.From the viewpoint of adhesion performance, 5 parts by mass or more. From the viewpoint of minimizing the amount of water. Preferably it is 5 to 10 parts by mass, more preferably 5 to 8 parts by mass.
- Adhesion aids should be at least one of saturated hydrocarbons refined from crude oils such as liquid paraffin, mineral oil, and white mineral oil, polyisobutylene homopolymerized with isoptenene, or polybutene copolymerized with isobutene and normal butene. Add one type. Most preferred is mineral oil. The amount of addition was 100 parts by mass of the composition comprising the crystalline polypropylene resin and the softener. On the other hand, from the viewpoint of the feeling of touch and stable adhesion, the content is 10 parts by mass or more and 20 parts by mass or less. Further, it is preferably at least 15 parts by mass.
- the surface layer (A) made of the polypropylene-based resin composition may be mixed with known additives such as antioxidants within a range not departing from the object of the present invention.
- additives such as antioxidants within a range not departing from the object of the present invention.
- glycerin fatty acid ester glycerin fatty acid ester.
- the film of the present invention has a core layer (B) disposed adjacent to the surface layer (A). This prevents aliphatic hydrocarbons, which are liquid at room temperature in the surface layer (A), from migrating to the core layer (B) due to the predation phenomenon, thereby preventing a concentration gradient from occurring. Only hydrocarbons can be retained in the surface layer.
- the crystalline polypropylene resin forming the core layer (B) may be the same as that used in the core layer (A). As with the core layer (A), it meets the standards or standards for food packaging. Those that match are preferred.
- the aliphatic hydrocarbon (C 2) which is liquid at normal temperature used in the core layer (B) of the present invention is a saturated hydrocarbon such as fluid paraffin, mineral oil, and white mineral oil.
- the kinematic viscosity at 40 ° C. is preferably 180 cSt, more preferably in the range of 140 cSt.
- the amount of the aliphatic hydrocarbon (C 2) added may cause a bleed-in phenomenon.
- 2 mass to suppress and maintain the adhesion and pull-out properties over time.
- it is blended in the range of 20% by mass or less.
- the normal temperature liquid aliphatic hydrocarbons existing in the surface layer (A) migrate from the surface layer (A) to the core layer (B) due to bleed-in reduction, so that the aliphatic hydrocarbons relative to the hydrogenated terpene resin in the surface layer (A)
- the proportion of hydrocarbons decreases. Therefore, the initially obtained adhesion and pull-out properties change.
- the composition of the surface layer (A) becomes flexible. As a result, the elastic modulus of the entire film is reduced, and the stiffness is significantly reduced.
- the present invention by adding a specific amount of a low-viscosity aliphatic hydrocarbon to the surface layer (A) and the adjacent core layer (B), the bleed-in phenomenon is suppressed, and the elastic modulus of the entire film is significantly reduced. And maintain good adhesion and pull-out properties.
- the addition amount of the aliphatic hydrocarbon liquid at room temperature of (A) is d parts by mass, and the addition amount of the aliphatic hydrocarbon liquid at room temperature of the core layer (B) is e mass%, and the surface layer with respect to the core layer (B) (A)
- the core layer (B) preferably does not contain a resin having a melting peak temperature of 200 ° C. or more.
- a resin with a high melting peak temperature such as poly (4-methylpentene-11) resin, high heat resistance of 170 ° C or more is exhibited, but at the same time, the elastic modulus of the film increases, Adhesiveness cannot be obtained, and the usability, as represented by a firm feeling, is also poor.
- antioxidants can be mixed with the composition of the core layer (B) within the range not departing from the purpose of the present invention, in order to ensure moldability. It is.
- f is preferably in the range of 0.2 to 2.7, where f is the volume ratio of the surface layer (A) to the core layer (B). If the volume ratio of the surface layer (A) is smaller than 0.2, it may not be possible to exert the adhesion over the entire surface of the film. If the volume ratio of the surface layer (A) is larger than 2.7, the whole film becomes soft, the stiffness is reduced, and the usability is deteriorated.
- the ratio of the front and back of the surface layer (A) is not particularly limited, but is preferably approximately equal in consideration of the ratio that does not need to be distinguished between the front and back of the film.
- a leak layer composed of trim ends and the like at the time of manufacturing may be used as long as the object of the present invention is not impaired. It may be arranged.
- the other layers are preferably 5% by mass or less of all the layers and 5% or less of the volume ratio of all the layers. However, it is necessary to stack other layers so that the surface layer (A) and the core layer (B) do not lose their adjacent state.
- the work of adhesion is used as an index for the adhesion.
- the adhesion work is an index for evaluating the adhesion between the film and the container when a wrap film is put on a container or food. This adhesion is an important property in the wrap film as well as the drawability, as described above.
- the contact work is determined by the work when the adhered films are peeled off from each other. The detailed measuring method is as described later.
- the contact work is preferably from 1.0 to 3.0 OmJ, more preferably from 1.5 to 2.5 mJ, from the viewpoint of appropriate adhesion.
- the pull-out power of the wrap film referred to in the present invention is an important property together with the adhesion, and evaluates the ease of pulling out the film from the rolled film stored in the storage box.
- the measurement is performed by the method described below.
- the draw output is preferably from 200 to 1 O OmN, more preferably from 200 to 80 OmN, and still more preferably from 200 to 60 OmN, from the viewpoint of good drawability. O m N.
- the wrap film may be stored under high temperature and high humidity, for example, in a general household kitchen or a commercial kitchen, but it is desirable that the amount of close contact work and the pulling force do not change significantly during that time.
- the change in the amount of contact work and the pulling power before and after the wrap film wound on a paper tube is left at 40 ° C and a relative humidity of 20% for 3 weeks is used.
- the change rate of the contact work is preferably in the range of 120 to 150%, and the change rate of the pull output is preferably in the range of 150 to + 20%. Within this range, it is considered that the balance between the adhesiveness and the drawability will not be lost until the product is distributed and consumed.
- the film when the observation of the film surface in the present invention is performed by imaging phase information with respect to cantilever stimulation with an atomic force microscope (hereinafter AFM), the film preferably has a specific structure.
- AFM atomic force microscope
- the part with a small delay, that is, the hard part is displayed brightly in the phase image
- the part with a large phase delay, that is, the soft part is displayed in the phase image. Is displayed.
- the preferred film surface of the wrap film of the present invention is observed by this method, it is composed of a fibril-like network structure and a matrix existing therebetween.
- the image example observed in this way is the image in FIG.
- the network structure refers to a portion that appears continuously bright on an image
- the matrix refers to a portion that is surrounded by the network structure and appears discontinuously dark.
- the fibrous bright portion observed continuously is defined as a fibril network structure
- the discontinuous black portion is defined as a matrix.
- 50 images of 2 micron and 2 micron were randomly observed from the range of 10 mm x 1 O mm, and the fibril width was the most uniform among the images, and the distance between each fibril was observed. The part where the distance is the most uniform is extracted. For the extracted image, select 100 points for the fibril width and the distance between fiprils. The average value is calculated for the remaining 80 points excluding the top and bottom 20 points, and the width of the fibril and the size of the matrix described later are used.
- the average width of the fibrils is preferably 1 nm or more and 100 nm or less. When the average width of the fibrils is in this range, the smoothness of the film surface is maintained, and the adhesion is further improved. More preferably, it is 10 nm or more and 50 nm or less.
- the size of the matrix (that is, the average value of the intervals between fibrils and fiprils) preferably has an average width of 3 nm or more and 1 ⁇ or less.
- the average size of the matrix is within this range, the adhesive components constituting the matrix are retained in the network structure on the film surface, are not exposed to the surface more than necessary, and the balance between the adhesiveness and the drawability is maintained. . More preferably, it is in the range of 10 nm to 50 nm.
- crystal parts of the polypropylene-based resin mainly form fibrils.
- the amorphous part of polypropylene, softener, hydrogenated terpene resin, and aliphatic hydrocarbons that are liquid at room temperature mainly form the matrix.
- the sea-island structure is used.
- the adhesive component is not uniformly present on the surface, and the balance between the adhesiveness and the extractability decreases.
- the film of the present invention preferably has a specific flexibility, and specifically, preferably has a tensile modulus of 200 to 100 OMPa.
- Tensile modulus was measured in accordance with the method described in ASTM D-882 using a tensile tester (a universal tensile and compression tester manufactured by Shinko Tsushin Kogyo Co., Ltd.) in the machine direction (MD-take-off direction) and the transverse direction ( It is obtained by measuring the average value of the tensile modulus at 2% strain (TD direction perpendicular to the take-off direction).
- This value is preferably at least 20 MPa from the viewpoint of flexibility, firmness and usability of the film, and is preferably at most 100 OMPa from the viewpoint of flexibility, adhesion and usability. More preferably 400MPa or more and less than 700MPa It is.
- the thickness of the film of the present invention is preferably 3 ⁇ m or more from the viewpoints of strength as a packaging film, stiffness, and ease of use during packaging.Adhesion to articles during packaging, ease of use of the film, and household food wrap. It is preferably 25 m or less from the viewpoints of mass, winding diameter, ease of handling during use, and the like. In particular, for household food packaging wraps that require ease of use, such as adhesiveness and extractability, 6 ⁇ to 15 ⁇ are more preferred.
- a known film forming method can be used as a method for producing the film.
- Preparation of the polypropylene resin composition for the surface layer ( ⁇ ) is performed by melt-kneading using an extruder or the like. Since the softener and hydrogenated terpene resin are solid at room temperature, add a predetermined amount to a blender with commercially available polypropylene resin pellets, and mix them sufficiently uniformly. This is put into a surface layer extruder. Since the aliphatic hydrocarbons in the surface layer ( ⁇ ) and the core layer ( ⁇ ) are liquid at room temperature, liquid injection equipment was installed in the middle of the extruder for the surface layer and the core layer, respectively. Add to fat.
- a uniform composition is obtained by kneading under appropriate extrusion conditions, and the mixture is extruded into a multilayer film with a surface layer, a core layer, and, if necessary, a rework layer by a multilayer die.
- the compositions of the surface layer ( ⁇ ) and the core layer ( ⁇ ) are sufficiently melt-kneaded in advance using a known device such as a twin-screw extruder to which liquid can be added, and a pellet is formed. They can also be fed into the extruder for the core layer.
- the extruder for the surface layer and the extruder for the core layer described above are arranged in parallel, and a predetermined resin is poured into each of them and sufficient.
- the resin from the extruder is melted and kneaded, and the resin from these extruders is merged into three layers on the downstream side.For example, it is formed into a sheet using an annular die or a die with a slit-shaped discharge port. And extrude.
- the extruded resin is cooled and solidified by a known method such as passing through a cold water bath or contacting with cold air or a cooling roll.
- the cooling temperature of the extruded sheet surface is preferably 10 ° C or more from the viewpoint of surface smoothness and appearance, and the bleeding property and adhesion of the adhesive agent mixed in the surface layer (A) to the surface are preferable.
- the strength as a film in the longitudinal direction and the Z direction or the transverse direction by a generally known method such as uniaxial stretching or biaxial stretching by a roll method or a tenter method, or multiaxial stretching by a tubular method, for food packaging. Stretch 2 times or more from the viewpoint of the cuttability of the film when used as a wrap.
- the stretching order in the vertical and horizontal directions is not particularly specified. The magnification in the vertical and horizontal directions may not be the same. More preferably, it is desirable that the film be stretched twice or more in each of the longitudinal and transverse directions by the multiaxial stretching by the tubular method.
- the stretched film is made into a product through processes according to the desired product form, such as trimming the film end, cutting it to a desired size, or winding it on a paper tube.
- the stretched film may be heat-set by a known method in order to adjust the heat shrinkage of the film.
- a method using contact heating from the mouth and indirect heating using infrared rays while restricting the MD direction with a roll, a method using a tenter to restrict the lateral direction and heating using hot air or radiant heat, or forming bubbles again A method of heating with hot air or radiant heat in the state can be used.
- the film is excellent in transparency, heat resistance, moderate flexibility, good touch, cutability and safety, as well as the balance of adhesion and pull-out required for the performance of the wrap film. It can be suitably used as a food packaging wrap film.
- the method for evaluating the performance of the film obtained according to the present invention is as follows.
- Adhesion between films when a wrap film is placed on a container such as tableware or food And was measured as follows.
- a filter paper with the same bottom area was previously attached to the bottom surface of each of two cylinders having a bottom area of 25 cm 2 and a mass of 400 g.
- the wrap film was fixed to the bottom surfaces of the two cylinders to which the filter paper was attached by tension so that no wrinkles were formed. Then, the two cylinders were joined together so that these film surfaces were exactly overlapped with each other, and pressed under a condition of 23 ° C. and a relative humidity of 50% under a load of 500 g for 1 minute.
- the superposed films were separated from each other in a direction perpendicular to the surface at a speed of 5 mmZ using a tensile tester (Universal Telecommunications Industry Co., Ltd., universal tensile compression tester), and the energy (m J) generated at this time was measured.
- m J energy generated at this time was measured.
- the change in the adhesion work amount of the sample stored for 21 days in an atmosphere at a temperature of 40 ° C and a relative humidity of 20% with respect to the adhesion work amount before storage was evaluated based on the following criteria.
- a film slit to a width of 300 mm is wound on a paper tube with an outer diameter of 41 mm, a diameter of 38 mm, and a width of 308 mm with a tension of 2 ON and 2 Om at a speed of 10 OmZ, winding film. It was created.
- the output before storage was evaluated according to the following criteria.
- the haze of the obtained film was measured using NDH-30 OA (manufactured by Nippon Denshoku) according to the method described in ASTM-D-103, and evaluated according to the following criteria. ⁇ Less than 1.0
- the heat resistance was measured according to Article 11 of the Tokyo Consumer Ordinance. Films with a heat resistance temperature of 140 ° C or higher were rated as ⁇ , those with a temperature of 130 ° C and 135 ° C as ⁇ , and those with a temperature of 125 ° C or less as X.
- Flexibility was measured using a tensile tester (a universal tensile and compression tester manufactured by Shinko Tsushin Kogyo Co., Ltd.) in accordance with the method described in ASTM D882. 2% strain in the machine direction (MD) and transverse direction (TD) of the film. The tensile modulus at the time was measured. Evaluation was made according to the following criteria.
- ⁇ Average value in both vertical and horizontal directions is 40 OMPa or more and less than 70 OMPa
- the feel was evaluated by having 50 randomly selected housewives give sensory evaluations of good or bad touch. The evaluation was performed according to the following criteria. ⁇ : 45 or more people who feel good
- ⁇ The number of people who feel good is 30 or more and less than 40
- the cutability of the film was determined by winding the obtained film on a paper tube with a width of 300 mm and a winding length of 20 m, and then storing it in a decorative box for Saran wrap manufactured by Asahi Kasei Corporation. Was cut. From the cutting state at that time, evaluation was made according to the following criteria.
- Observation of the film surface with a phase image of an atomic force microscope was performed by the following method.
- the film was attached to glass and fixed, and the surface was observed with a Nano Scope IIIa (manufactured by Digital Instrument) in a tapping mode in a tapping mode.
- the test was performed under the conditions of a Z limit of 440 V and the number of sampling points of 5 1 2 5 1 2.
- the targetam ⁇ 11: 11 (For 16 ka 2 V, Set Point 0.8-1.4 V, targeta mp 1 itude 4 V In this case, the set point was in the range of 2.0-3.5 V.
- the 10 mm x 10 mm range of the sample 50 random images of 2 micron x 2 micron were observed. From these images, the part with the most uniform fibril width and the most uniform distance between the fibrils is extracted, and the field of view of the extracted 2 ⁇ ⁇ 2 ⁇ ⁇ is increased by 40,000 times.
- ⁇ Average width of fibrils is 1 11111 or more and less than 5011111
- ⁇ 50 nm or more and less than 100 nm
- the average distance between fiprils was evaluated according to the following criteria.
- ⁇ 3 nm or more and less than 10 nm, or 50 nm or more and less than 1000 nm
- a low-crystalline propylene- ⁇ -olefin copolymer resin (Mitsui Chemicals, Inc.) is used as a softening agent and a crystalline polypropylene resin (Grand Polymer Co., Ltd., Grand Polypropylene F327, terpolymer of propylene and ethylene butene_1). (Tuffmer XR110T, manufactured by Co., Ltd.) was mixed at a mass ratio of 75:25. To 100 parts by mass of this, 5 parts by mass of a hydrogenated terpene resin (Clearon 125, Yasuhara Chemical Co., Ltd.) was charged into a blender and mixed well at room temperature for 5 minutes.
- a hydrogenated terpene resin (Clearon 125, Yasuhara Chemical Co., Ltd.) was charged into a blender and mixed well at room temperature for 5 minutes.
- a pellet was formed by melt mixing with a co-rotating twin-screw extruder (TEM-35BS, manufactured by Toshiba Machine Co., Ltd.) having a screw diameter of 37 mm and L / D 42.
- mineral oil Kermematic viscosity P70 / (Kinematic viscosity at 40 ° C) of 9.6 cSt) at Matsumura Petroleum Research Institute as an aliphatic hydrocarbon liquid at room temperature was injected from the middle of the barrel. Was added.
- the addition amount was 15 parts by mass based on 100 parts by mass of the mixture amount of the crystalline polypropylene resin and the softener. This was used as a surface layer resin.
- a multilayer stretched film was prepared using the above resin.
- the resin mixture obtained above was put into each of a surface layer extruder and a core layer extruder of a multilayer extruder capable of extruding a symmetrical two-type and three-layered symmetrical resin layer configuration. After being sufficiently melted in each extruder, the film was extruded at 220 ° C. with a multilayer annular die, and then cooled with water.
- the obtained film was stretched 5 times vertically and 4 times horizontally at a stretching temperature of 120 ° C. using an inflation-puffable stretching apparatus. Then, the end of the cylindrical film was trimmed and wound up one by one. Thereafter, heat fixing was performed at a hot air temperature of 130 ° C and a residence time of 20 seconds using a tenter in which the width of the clip constrained in the horizontal direction was set constant. As a result, a film having a substantially uniform thickness of 0.1 ⁇ having a layer thickness ratio of 0.25, 0.50, 0.25 in the order of the surface layer, the core layer, and the surface layer was obtained. When the physical properties of this film were measured, it showed good performance as shown in Table 2. In addition, when the obtained film was observed at a magnification of 40,000 times with a phase image of an atomic force microscope, it was found that the structure consisting of network-like fiprils and a matrix existing therebetween was observed. did it.
- a crystalline polypropylene-based resin and a low-crystalline propylene- ⁇ -olefin copolymer resin in a weight ratio of 65:35 were used as the surface layer resin, and the amount of mineral oil added to the core layer was 7%. %, And the layer thickness ratio was 10 ⁇ m in the same manner as in Example 1 except that the thickness ratio of each layer was 0.20, 0.60, and 0.20 in the order of the surface layer, the core layer, and the surface layer. A film was obtained. When the physical properties of the film were measured, it showed good performance as shown in Table 2.
- the resin composition of the surface layer is such that the crystalline polypropylene resin and the low-crystalline propylene monoolefin copolymer resin have a weight ratio of 55:45, and the thickness ratio of each layer is the surface layer, the core layer, and the surface layer.
- a film having a thickness of 1 ⁇ was obtained in the same manner as in Example 1 except that 0.15, 0.70, and 0.15 were used in this order. When the physical properties of this film were measured, it showed good performance as shown in Table 2.
- the amount of the hydrogenated terpene resin was 15 parts by weight with respect to 100 parts by weight of the resin composition of the crystalline polypropylene resin and the low-crystalline propylene- ⁇ -olefin copolymer resin of the surface layer of Example 1.
- a film having a thickness of 10 ⁇ m was obtained in the same manner as in Example 1 except that the oil was used. When the physical properties of this film were measured, it showed good performance as shown in Table 2.
- the crystalline polypropylene resin and the low-crystalline propylene-olefin copolymer resin are in a mass ratio of 55:45, and the hydrogenated terpene resin and the mineral oil are combined with the crystalline polypropylene resin.
- the same method as in Example 1 was adopted except that the composition ratio was 97: 3, and the thickness ratio of each layer was 0.15, 0.70, 0.15 in the order of the surface layer, the core layer, and the surface layer.
- a film having a thickness of 10 ⁇ m was obtained. When the physical properties of this film were measured, it showed good performance as shown in Table 2.
- polybutene Nasan Polypten 06 SH (Kinematic viscosity at 40 ° C 95 cSt) at 95 ° C
- a film having a thickness of 10 m was obtained in the same manner as in Example 1 except that 5 parts by mass was added. When the physical properties of this film were measured, it showed good performance as shown in Table 2.
- a film having a thickness of 10 was prepared in the same manner as in Example 1 except that 70% by mass of an ethylene propylene random copolymer (PC 630A, manufactured by San-Alomer Co., Ltd.) was used as the crystalline polypropylene resin in the resin composition of the surface layer. Got. When the physical properties of the film were measured, it showed good performance as shown in Table 2.
- PC 630A ethylene propylene random copolymer
- Example 2 Same as Example 1 except that 75% by mass of an ethylene propylene block copolymer (manufactured by Grand Polymer Co., Ltd., Grand Polypro J705) was used as the crystalline polypropylene resin having a resin composition of the surface layer. Thickness of 10 im I got Irum. When the physical properties of the film were measured, it showed good performance as shown in Table 2.
- a film having a thickness of 10 ⁇ was obtained in the same manner as in Example 1 except that the extruded film was stretched 2.5 times in length and 2.5 times in width in Example 1. When the physical properties of this film were measured, it showed good performance as shown in Table 2.
- Example 2 In the same manner as in Example 1 except that the film was stretched at a temperature of 60 ° C., the stretching ratio was 4 times vertically and 3 times horizontally, and the heat fixing treatment after stretching was not performed. A film having a thickness of 10 ⁇ m was obtained by the above method. When the physical properties of the film were measured, it showed good performance as shown in Table 2.
- a resin composition obtained by mixing a crystalline polypropylene resin and a low-crystalline propylene- ⁇ olefin copolymer resin at a mass ratio of 40:60 is used as a surface layer resin, and the thickness ratio of each layer is determined by comparing the thickness ratio of the surface layer, the core layer, A film having a thickness of 10 ⁇ was obtained in the same manner as in Example 1, except that 0.15, 0.70 and 0.15 were formed in the order of the surface layers. Table 3 shows the volume ratio between the layers. When the physical properties of this film were measured, as shown in Table 4, the initial adhesion and the drawing force were excessive.
- Example 3 Same as Example 1 except that the resin composition of the surface layer was a crystalline polypropylene resin and a low crystalline propylene- ⁇ -olefin copolymer resin in a mass ratio of 85:15 by mass. To obtain a film having a thickness of 10 ⁇ . When the physical properties of this film were measured, the initial adhesion was insufficient as shown in Table 4. [Comparative Example 3]
- the resin composition of the surface layer was a resin composition in which the addition amount of the hydrogenated terpene resin was 20 parts by weight based on 100 parts by weight of the sum of the crystalline polypropylene resin and the low-crystalline propylene-a-olefin copolymer resin.
- a film having a thickness of 10 ⁇ m was obtained in the same manner as in Example 1 except for the above. When the physical properties of this film were measured, as shown in Table 4, the initial adhesion was low.
- the resin composition of the surface layer was the same as that of the Example except that the addition amount of the hydrogenated terpene resin was 2 parts by weight based on 100 parts by weight of the sum of the crystalline polypropylene resin and the low-crystalline propylene- ⁇ -olefin copolymer resin.
- a film having a thickness of 10 ⁇ m was obtained in the same manner as in 1. When the physical properties of this film were measured, as shown in Table 4, the initial adhesion was low.
- the resin composition of the surface layer is 100 parts by weight of a crystalline polypropylene resin and 100 parts by weight of a low-crystalline propylene copolymer resin, 10 parts by weight of a hydrogenated terpene resin, and 5 parts by weight of a mineral oil.
- a film having a thickness of 10 ⁇ m was obtained in the same manner as in Example 1, except that the resin composition was added partially. When the physical properties of this film were measured, as shown in Table 4, the adhesion was low and the drawing power was high.
- the amount of the hydrogenated terpene resin is 10 parts by weight based on 100 parts by weight of the sum of the crystalline polypropylene resin and the low-crystalline propylene-a-olefin copolymer resin, A film having a thickness of 10 ⁇ m was obtained in the same manner as in Example 1 except that the addition amount was 25 parts by mass. When the physical properties of this film were measured, as shown in Table 4, it was inferior in performance due to being excessively flexible, having poor stiffness and poor touch feeling. [Comparative Example 7]
- a 10- ⁇ m thick film was obtained in the same manner as in Example 1 except that the mass ratio of the crystalline polypropylene resin and the mineral oil in the core layer was set to 99: 1.
- the mass ratio of the crystalline polypropylene resin and the mineral oil in the core layer was set to 99: 1.
- Example 1 was the same as Example 1 except that the mass ratio of the crystalline polypropylene resin in the core layer and the mineral oil (Matsumura Petroleum Institute, Moresco White P70) as a liquid aliphatic hydrocarbon at room temperature was 60:40. An attempt was made to form a film using the same method, but the film formation was poor and no film was obtained.
- the mass ratio of the crystalline polypropylene resin in the core layer and the mineral oil (Matsumura Petroleum Institute, Moresco White P70) as a liquid aliphatic hydrocarbon at room temperature was 60:40.
- the resin composition of the core layer is a 75:25 mass ratio of a crystalline polypropylene resin and a low-crystalline propylene monoolefin copolymer resin (Tuffa-1 XR110T, manufactured by Mitsui Chemicals, Inc.).
- a film having a thickness of 10 ⁇ m was obtained in the same manner as in Example 1 except for the above.
- Table 4 the flexibility and the initial adhesive strength and the pull-out power were almost the same as those in Example 1, but the adhesive strength after being left at 40 ° C for 21 days Increased.
- a film having a thickness of 10 m was obtained in the same manner as in Example 1, except that a single-layer film having the surface layer composition of Example 1 was used.
- Table 4 the adhesion-pulling-out property was stable, but it was inferior in stiffness due to excessive flexibility.
- Ratio 3 1 0 0 .5 0 .5 1.0 0 5 25 20 1 5 90 1 0
- F327 Crystalline polypropylene resin made by Grand Polymer Co., Ltd.
- PC 630 Crystalline homopolypropylene resin manufactured by San-Alomer Co., Ltd.
- J 705 Crystalline block polypropylene resin manufactured by Grand Bolimar Co., Ltd.
- the balance between the adhesion and the pull-out property is excellent, and the performance is little changed over time, and the transparency, the heat resistance, the flexibility, the touch, and the cuttability are provided.
- a polypropylene-based multilayer film having excellent characteristics.
- the film can be suitably used for a food packaging wrap film.
Landscapes
- Laminated Bodies (AREA)
- Wrappers (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA002496926A CA2496926C (en) | 2002-08-29 | 2003-08-26 | Polypropylene-based wrap film |
JP2004532714A JP4480578B2 (ja) | 2002-08-29 | 2003-08-26 | ポリプロピレン系ラップフィルム |
AU2003261731A AU2003261731A1 (en) | 2002-08-29 | 2003-08-26 | Polypropylene wrap film |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2002250192 | 2002-08-29 | ||
JP2002-250192 | 2002-08-29 |
Publications (1)
Publication Number | Publication Date |
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WO2004020195A1 true WO2004020195A1 (ja) | 2004-03-11 |
Family
ID=31972615
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2003/010797 WO2004020195A1 (ja) | 2002-08-29 | 2003-08-26 | ポリプロピレン系ラップフィルム |
Country Status (8)
Country | Link |
---|---|
JP (1) | JP4480578B2 (ja) |
KR (1) | KR100681364B1 (ja) |
CN (1) | CN100377872C (ja) |
AU (1) | AU2003261731A1 (ja) |
CA (1) | CA2496926C (ja) |
MY (1) | MY127301A (ja) |
TW (1) | TWI228129B (ja) |
WO (1) | WO2004020195A1 (ja) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2006009198A1 (ja) | 2004-07-23 | 2006-01-26 | Asahi Kasei Life & Living Corporation | プロピレン系多層ラップフィルム |
US8192813B2 (en) | 2003-08-12 | 2012-06-05 | Exxonmobil Chemical Patents, Inc. | Crosslinked polyethylene articles and processes to produce same |
JP2019043677A (ja) * | 2017-09-06 | 2019-03-22 | 旭化成株式会社 | ラップフィルム及びラップフィルム巻回体 |
JP2019043678A (ja) * | 2017-09-06 | 2019-03-22 | 旭化成株式会社 | ラップフィルム及びラップフィルム巻回体 |
JPWO2018042670A1 (ja) * | 2016-09-05 | 2019-06-24 | 日立化成株式会社 | 食品の仕分け方法、食品包装用フィルム及び化粧箱付食品包装用小巻フィルム |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR102487898B1 (ko) | 2020-11-30 | 2023-01-11 | 에이치디씨현대이피 주식회사 | Wrap 필름 조성물 및 상기 조성물을 포함하는 Wrap 필름 |
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JPH10202806A (ja) * | 1997-01-20 | 1998-08-04 | Itochu San Plus Kk | 自己粘着性包装用フィルム |
JP2001328223A (ja) * | 2000-05-23 | 2001-11-27 | Oji Paper Co Ltd | ポリプロピレン系二軸延伸多層フィルム |
JP2002046238A (ja) * | 2000-05-26 | 2002-02-12 | Asahi Kasei Corp | ポリプロピレン系多層フィルム |
JP2003019778A (ja) * | 2001-07-09 | 2003-01-21 | Asahi Kasei Corp | ポリプロピレン系多層ラップフィルム |
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US6387529B1 (en) * | 1997-12-24 | 2002-05-14 | Exxon Mobil Oil Corporation | Biaxially oriented HDPE multilayer film |
JPH11286087A (ja) * | 1998-02-03 | 1999-10-19 | Asahi Chem Ind Co Ltd | 包装用架橋積層フィルム |
JP2000026623A (ja) * | 1998-07-13 | 2000-01-25 | Asahi Chem Ind Co Ltd | 密着性耐熱ラップフィルム |
DE19836657A1 (de) * | 1998-08-13 | 2000-02-17 | Hoechst Trespaphan Gmbh | Mehrschichtig biaxial orientierte Polypropylenfolie mit verbesserter Barriere, Verfahren zu ihrer Herstellung und ihre Verwendung |
JP2001198937A (ja) * | 2000-01-21 | 2001-07-24 | Mitsui Chemicals Inc | 透明性に優れる高分子量ポリオレフィン積層フィルムの製造方法 |
JP2002210854A (ja) * | 2001-01-17 | 2002-07-31 | Daicel Chem Ind Ltd | 複合フィルム |
-
2003
- 2003-08-26 JP JP2004532714A patent/JP4480578B2/ja not_active Expired - Fee Related
- 2003-08-26 CA CA002496926A patent/CA2496926C/en not_active Expired - Lifetime
- 2003-08-26 CN CNB038204215A patent/CN100377872C/zh not_active Expired - Lifetime
- 2003-08-26 WO PCT/JP2003/010797 patent/WO2004020195A1/ja active Application Filing
- 2003-08-26 AU AU2003261731A patent/AU2003261731A1/en not_active Abandoned
- 2003-08-26 KR KR1020057003243A patent/KR100681364B1/ko active IP Right Grant
- 2003-08-28 TW TW092123795A patent/TWI228129B/zh not_active IP Right Cessation
- 2003-08-28 MY MYPI20033263A patent/MY127301A/en unknown
Patent Citations (4)
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JPH10202806A (ja) * | 1997-01-20 | 1998-08-04 | Itochu San Plus Kk | 自己粘着性包装用フィルム |
JP2001328223A (ja) * | 2000-05-23 | 2001-11-27 | Oji Paper Co Ltd | ポリプロピレン系二軸延伸多層フィルム |
JP2002046238A (ja) * | 2000-05-26 | 2002-02-12 | Asahi Kasei Corp | ポリプロピレン系多層フィルム |
JP2003019778A (ja) * | 2001-07-09 | 2003-01-21 | Asahi Kasei Corp | ポリプロピレン系多層ラップフィルム |
Cited By (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8192813B2 (en) | 2003-08-12 | 2012-06-05 | Exxonmobil Chemical Patents, Inc. | Crosslinked polyethylene articles and processes to produce same |
US8703030B2 (en) | 2003-08-12 | 2014-04-22 | Exxonmobil Chemical Patents Inc. | Crosslinked polyethylene process |
JP4832301B2 (ja) * | 2004-07-23 | 2011-12-07 | 旭化成ケミカルズ株式会社 | プロピレン系多層ラップフィルム |
WO2006009198A1 (ja) | 2004-07-23 | 2006-01-26 | Asahi Kasei Life & Living Corporation | プロピレン系多層ラップフィルム |
JPWO2018042670A1 (ja) * | 2016-09-05 | 2019-06-24 | 日立化成株式会社 | 食品の仕分け方法、食品包装用フィルム及び化粧箱付食品包装用小巻フィルム |
JP2020128263A (ja) * | 2017-09-06 | 2020-08-27 | 旭化成株式会社 | ラップフィルム及びラップフィルム巻回体 |
JP7170786B2 (ja) | 2017-09-06 | 2022-11-14 | 旭化成株式会社 | ラップフィルム及びラップフィルム巻回体 |
JP2019043678A (ja) * | 2017-09-06 | 2019-03-22 | 旭化成株式会社 | ラップフィルム及びラップフィルム巻回体 |
JP2019043677A (ja) * | 2017-09-06 | 2019-03-22 | 旭化成株式会社 | ラップフィルム及びラップフィルム巻回体 |
JP2020128262A (ja) * | 2017-09-06 | 2020-08-27 | 旭化成株式会社 | ラップフィルム及びラップフィルム巻回体 |
JP2021130511A (ja) * | 2017-09-06 | 2021-09-09 | 旭化成株式会社 | ラップフィルム及びラップフィルム巻回体 |
JP2021130510A (ja) * | 2017-09-06 | 2021-09-09 | 旭化成株式会社 | ラップフィルム及びラップフィルム巻回体 |
JP2019043679A (ja) * | 2017-09-06 | 2019-03-22 | 旭化成株式会社 | ラップフィルム及びラップフィルム巻回体 |
JP7170788B2 (ja) | 2017-09-06 | 2022-11-14 | 旭化成株式会社 | ラップフィルム及びラップフィルム巻回体 |
JP7173794B2 (ja) | 2017-09-06 | 2022-11-16 | 旭化成株式会社 | ラップフィルム及びラップフィルム巻回体 |
JP7173793B2 (ja) | 2017-09-06 | 2022-11-16 | 旭化成株式会社 | ラップフィルム及びラップフィルム巻回体 |
JP7175138B2 (ja) | 2017-09-06 | 2022-11-18 | 旭化成株式会社 | ラップフィルム及びラップフィルム巻回体 |
JP7326208B2 (ja) | 2017-09-06 | 2023-08-15 | 旭化成株式会社 | ラップフィルム及びラップフィルム巻回体 |
JP7330137B2 (ja) | 2017-09-06 | 2023-08-21 | 旭化成株式会社 | ラップフィルム及びラップフィルム巻回体 |
Also Published As
Publication number | Publication date |
---|---|
JP4480578B2 (ja) | 2010-06-16 |
TW200406423A (en) | 2004-05-01 |
CN100377872C (zh) | 2008-04-02 |
KR20050059107A (ko) | 2005-06-17 |
CA2496926C (en) | 2008-10-21 |
KR100681364B1 (ko) | 2007-02-12 |
CN1678456A (zh) | 2005-10-05 |
AU2003261731A1 (en) | 2004-03-19 |
MY127301A (en) | 2006-11-30 |
TWI228129B (en) | 2005-02-21 |
CA2496926A1 (en) | 2004-03-11 |
JPWO2004020195A1 (ja) | 2005-12-15 |
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