WO2002083768A1 - Feuille de polypropylene faiblement cristalline - Google Patents
Feuille de polypropylene faiblement cristalline Download PDFInfo
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- WO2002083768A1 WO2002083768A1 PCT/JP2001/002974 JP0102974W WO02083768A1 WO 2002083768 A1 WO2002083768 A1 WO 2002083768A1 JP 0102974 W JP0102974 W JP 0102974W WO 02083768 A1 WO02083768 A1 WO 02083768A1
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- polypropylene sheet
- crystalline polypropylene
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/07—Flat, e.g. panels
- B29C48/08—Flat, e.g. panels flexible, e.g. films
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
- B29C48/911—Cooling
- B29C48/9135—Cooling of flat articles, e.g. using specially adapted supporting means
- B29C48/914—Cooling of flat articles, e.g. using specially adapted supporting means cooling drums
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
- B29C48/911—Cooling
- B29C48/9135—Cooling of flat articles, e.g. using specially adapted supporting means
- B29C48/9145—Endless cooling belts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/022—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the choice of material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
- B29C51/002—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor characterised by the choice of material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
- B29K2023/10—Polymers of propylene
- B29K2023/12—PP, i.e. polypropylene
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
- B29K2105/25—Solid
- B29K2105/253—Preform
- B29K2105/256—Sheets, plates, blanks or films
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
- B29K2995/0018—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds having particular optical properties, e.g. fluorescent or phosphorescent
- B29K2995/0022—Bright, glossy or shiny surface
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
- B29K2995/0037—Other properties
- B29K2995/004—Semi-crystalline
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
- B29K2995/0037—Other properties
- B29K2995/0077—Yield strength; Tensile strength
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/712—Containers; Packaging elements or accessories, Packages
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2323/10—Homopolymers or copolymers of propene
- C08J2323/12—Polypropene
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/26—Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension
- Y10T428/269—Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension including synthetic resin or polymer layer or component
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/31504—Composite [nonstructural laminate]
- Y10T428/31855—Of addition polymer from unsaturated monomers
Definitions
- the present invention relates to a low crystalline polypropylene sheet.
- the polypropylene sheet formed by adding such a nucleating agent has a high degree of crystallinity due to an increase in diseased crystals and the number of spherulites, and the softening point temperature of the sheet increases accordingly.
- secondary heating thermalforming
- thermoforming a transparent polypropylene sheet which has hindered the expansion of the field of use of thermoformed transparent polypropylene sheets.
- An object of the present invention is to provide a low-crystalline polypropylene sheet that can be easily subjected to low-temperature thermoforming without using a special molding device and that can ensure transparency and gloss after molding. Disclosure of the invention
- the low-crystalline polypropylene sheet according to the present invention has an average spherulite radius of 0.1 m or more and 4 ⁇ m or less, an average number of spherulites in a sheet cross section of 600 / mm 2 or less, and a solid density of 0.1 SSS. g Z cm 3 or less, melting point of maximum endothermic peak in differential scanning calorimetry (DSC) curve
- DSC differential scanning calorimetry
- the average spherulite radius is larger than 4 / m, the internal haze increases (transparency decreases), which is not preferable. More preferably, the average spherulite radius is 3 / m or less.
- the average number of spherulites in the cross section of the sheet is more than 600 Zmm 2 , the softening point temperature of the sheet is undesirably high. More preferably, the average number of spherulites is 400 or less Zmm 2 .
- the solid density is larger than 0.895 g / cm 3 , the density is too high, that is, the crystallinity is too high, which is not preferable. If the thickness of the sheet is less than 50 ⁇ , it becomes difficult to produce a rigid molded article (such as a container) after thermoforming, which is not preferable.
- molten polypropylene extruded by a T-die extruder between the mirror-surface cooling roller and the endless belt (Not containing a nucleating agent), and press-contact to form a sheet, and it can be manufactured by a method of rapidly and sufficiently cooling below a predetermined temperature.
- the low-crystalline polypropylene sheet in the present invention may be either a single-layer sheet of low-crystalline polypropylene or a multilayer sheet including a low-crystalline polypropylene sheet.
- thermoforming such a low-crystalline polypropylene sheet a thermoformed product having high transparency and gloss can be obtained.
- the melting enthal pete H is relatively small, less than 90 JZg, and heat generation of 1 JZg or more is observed on the low temperature side, the amount of heat that must be supplied from the outside to soften the sheet is small, and Since the heating temperature during softening is relatively low, low-temperature thermoforming becomes easier.
- thermoformed product since it is a low-crystalline polypropylene sheet with a gloss of 90% or more, the gloss of the sheet is high, and the gloss of the thermoformed product obtained by thermoforming the sheet is also high, so the commercial value of the thermoformed product Will be higher.
- the internal haze of the low-crystalline polypropylene sheet is preferably (330 t 2 _ 150 t + 20)% or less. .
- (330 t 2 - 1 50 t + 20) measures the relationship between the internal haze and the sheet thickness, an equation obtained by the least squares method.
- the internal haze of the polypropylene sheet one Bok within the above range, the internal haze of the thermoformed articles (330 s 2 - 1 50 s + 25)% or less (s: the thermoformed part thickness (mm)) It can be.
- the low crystalline polypropylene sheet preferably has a tensile modulus of 1500 MPa or less.
- the low crystalline polypropylene sheet has a tensile modulus of 150 OMPa or more, it may become too stiff and difficult to thermoform, and the tensile modulus of the thermoformed product decreases, The strength as a molded article may be insufficient.
- the tensile modulus of the thermoformed product can be made 1700 MPa or more, so that sufficient strength can be obtained.
- the tensile modulus in the present invention refers to a value measured in the moving direction (MD direction) during sheet production by a method based on JISK7113.
- the raw material of the low crystalline polypropylene sheet is a homopolypropylene.
- it is selected from any one of four types of rubber, random polypropylene, block polypropylene, and a mixture thereof.
- the random polypropylene and the block polypropylene a copolymer of ethylene and propylene can be employed.
- a random copolymer with ethylene has excellent transparency.
- the raw material preferably contains a petroleum resin and a no or terpene resin.
- the petroleum resin a resin using a petroleum unsaturated hydrocarbon as a raw material, for example, a resin obtained by heating and polymerizing cyclopentene, higher olefin hydrocarbon, or the like under an acid catalyst can be used.
- a resin obtained by heating and polymerizing cyclopentene, higher olefin hydrocarbon, or the like under an acid catalyst can be used.
- a terpene resin for example, a resin obtained by polymerizing a terpene such as turpentine oil, kama-binene, dipentene or the like under an acid catalyst can be used.
- FIG. 1 is a schematic view showing an apparatus for producing a low-crystalline polypropylene sheet according to one embodiment of the present invention.
- FIG. 2 is a diagram showing a differential scanning calorimetry curve of the polypropylene sheet obtained in Example 1.
- FIG. 3 is a diagram showing a differential scanning calorimetry curve of the polypropylene sheet obtained in Comparative Example 2.
- FIG. 1 shows a production apparatus 1 for producing a low-crystalline polypropylene sheet according to the present invention.
- the manufacturing device 1 includes an extruder T die 12, a first cooling roll 13, a second cooling roll 14, a third cooling roll 15 and a fourth cooling roll 16, a metal endless belt 17, and a cooling water.
- a spray nozzle 18, a water tank 19, a water absorbing roll 20, and a peeling roll 21 are provided.
- the first cooling roll 13, the second cooling roll 14, and the third cooling roll 15 are metal rolls, and a cooling means (not shown) of a water-cooling type or the like is built in the inside thereof to enable surface temperature adjustment. Have been.
- the surface of the first and second cooling rolls 13 and 14 is coated with an elastic material 22 made of nitrile-butadiene rubber (NBR).
- the elastic material 22 has a hardness (measured by a method according to JIS K6301A) of 60 degrees or less and a thickness of 1 Omm.
- At least one of the first, second, and third cooling rolls 13, 14, 15 has its rotating shaft connected to a rotation driving means (not shown).
- the fourth cooling roll 16 is a metal roll having a mirror surface having a surface roughness of 1.0 S or less, and has a cooling means such as a water-cooling type for enabling the surface temperature to be adjusted (not shown). ) Is built-in. Here, if the surface roughness is greater than 1. O S, the resulting polypropylene sheet 11 has a low gloss, resulting in a sheet 11 having low transparency.
- the fourth cooling roll 16 is disposed so as to sandwich the polypropylene sheet 11 between the first cooling roll 13 and the endless belt 17 made of metal.
- the endless belt 17 is made of stainless steel or the like, and has a mirror surface having a surface roughness of 1. O S or less.
- the endless belt 17 is rotatably wound around the first to third cooling rolls 13 to 15 described above.
- the cooling water spray nozzle 18 is provided on the lower surface side of the fourth cooling roll 16, and the cooling water spray nozzle 18 blows the cooling water to the back surface of the endless belt 17.
- the endless belt 17 is rapidly cooled, and the polypropylene sheet 11 immediately after being pressed by the first and fourth cooling rolls 13 and 16 is also rapidly cooled.
- the water tank 19 is formed in a box shape with an open upper surface, and is provided under the fourth cooling roll 16. It is provided so as to cover the entire surface.
- the water tank 19 collects the sprayed cooling water and discharges the collected water from a discharge port 19 A formed on the lower surface of the water tank 19.
- the water absorbing roll 20 is installed on the side surface of the fourth cooling roll 16 on the side of the second cooling roll 14 so as to be in contact with the endless belt 17. It acts to remove water.
- the peeling roll 21 is arranged so as to guide and press the low-crystalline polypropylene sheet 11 to the endless belt 17 and the second cooling roll 14, and to remove the low-crystalline polypropylene sheet 11 after the completion of cooling. Remove from endless belt 17. A method of manufacturing the low-crystalline polypropylene sheet 11 using the manufacturing apparatus 1 configured as described above will be described.
- the endless belt 17 and the fourth cooling roll 16 which come into direct contact with the polypropylene sheet 11 and cool it are kept in advance so that the surface temperature of the cooling roll is maintained at the dew point or higher and 3 Ot: or lower. Performs temperature control of 13, 14, 15, and 16.
- the surface temperature of the fourth cooling roll 16 and the endless belt 17 is lower than the dew point, dew condensation may occur on the surface, making it difficult to form a uniform film.
- the surface temperature is higher than 30, the resulting polypropylene sheet 11 will have low transparency, and will have a large number of crystals, which may make it difficult to perform thermoforming. Therefore, in this embodiment, the surface temperature is set to 14.
- the polypropylene sheet 11 (containing no nucleating agent) extruded from the T-die 12 of the extruder is placed on the first cooling roll 13 by the endless belt 17 and the fourth cooling roll 16. Insert it between. In this state, the polypropylene sheet 11 is pressed against the first and fourth cooling rolls 13 and 16 and rapidly cooled at 14 ° C.
- the elastic member 22 is compressed and elastically deformed by the pressing force between the first cooling roll 13 and the fourth cooling roll 16.
- the portion where the elastic member 22 is elastically deformed that is, the arc portion corresponding to the center angle lock 1 of the first cooling roll 13, and the polypropylene sheet 11 is 3, 16 are pressed in a plane.
- the surface pressure at this time is 0.1 to 20 MPa.
- the polypropylene sheet 11 pressed as described above and sandwiched between the fourth cooling roll 16 and the endless belt 17 is then contacted with the endless belt 17 at an arc corresponding to a substantially lower half circumference of the fourth cooling roll 16. It is sandwiched between the fourth cooling roll 16 and is pressed in a planar manner, and is further rapidly cooled by spraying cooling water to the back side of the endless belt 17 by the cooling water spray nozzle 18.
- the surface pressure at this time is between 0.01 and 0.5 MPa, and the temperature of the cooling water is 8 ° C.
- the sprayed cooling water is collected in the water tank 19, and the collected water is discharged from the drain 19A.
- the polypropylene sheet 11 adhered to the endless belt 17 is moved onto the second cooling roll 14 with the rotation of the endless belt 17.
- the polypropylene sheet 11 guided by the peeling roll 21 and pressed to the second cooling roll 14 side has an endless belt 1 at an arc portion corresponding to a substantially upper half circumference of the second cooling roll 14 as described above. It is pressed in a plane by 7 and cooled again at a temperature below 3 Ot :.
- the surface pressure at this time is from 0.01 to 0.5 MPa.
- Water adhering to the back surface of the endless belt 17 is removed by a water absorbing roll 20 provided on the way from the fourth cooling roll 16 to the second cooling roll 14.
- the polypropylene sheet 11 cooled on the second cooling roll 14 is peeled off from the endless belt 17 by the peeling roll 21 and is wound up at a predetermined speed by a winding roll (not shown).
- Polypropylene sheet 1 1 produced in this way, the average spherulite radius is 0. 1 m or more and 4 or less, the average spherulite number of sheet cross section 600 mm 2 or less, the individual density is 0. 895 gZcm 3 below
- the melting enthalpy H at the maximum endothermic peak of the DSC curve is less than 90 JZg (see Fig. 2), the gloss of at least one side is 90% or more, and the exothermic peak is 1 JZg or more on the low temperature side of the maximum endothermic peak ( (See Fig. 2)
- the thickness is 50 m or more.
- the low-crystallinity polypropylene sheet 11 having a low crystallinity and capable of being subjected to low-temperature thermoforming is suitable for thermoforming into food packaging containers, blister packaging containers and the like. According to the above-described embodiment, the following effects can be obtained.
- the polypropylene sheet 11 Since the obtained polypropylene sheet 11 does not use a nucleating agent, the polypropylene sheet 11 has a small average spherulite radius, a small solid density, and a small average spherulite number. Therefore, since the crystallinity of the polypropylene sheet 11 is low, a sheet having a low heating softening point temperature, capable of being subjected to low-temperature thermoforming, and having good internal haze can be obtained. Further, since it is not necessary to use a special molding device, the manufacturing cost can be reduced.
- melt enthal pete H is relatively small, less than 90 J, and heat generation of 1 J or more is observed on the low temperature side, the amount of heat that must be supplied from outside to soften the polypropylene sheet 11 is small. Also, since the heating temperature during softening is relatively low, low-temperature thermoforming becomes easier.
- thermoformed product obtained by thermoforming the polypropylene sheet also increases, and the value of the thermoformed product as a product increases.
- the present invention is not limited to the above embodiment, and modifications and improvements as long as the object of the present invention can be achieved are included in the present invention.
- the endless belt 17 is wound around the first, second, and third cooling rolls 13, 14, 15, but is not limited thereto. In short, as long as the apparatus can rotate and cool the endless belt, the number of cooling rolls around which the endless belt is wound can be set arbitrarily.
- a mirror-finished stainless steel belt is used as the endless belt 17.
- the present invention is not limited to this. That is, there is no particular limitation as long as the endless belt has a surface roughness of 1.OS or less.
- a belt in which the surface of a metal endless belt is coated with a fluorine resin such as a polyimide resin or polytetrafluoroethylene, or the like. May be adopted.
- the elastic member 22 made of NBR having a hardness of 60 degrees and a thickness of 1 Omm is used as the elastic member 22.
- any material having a predetermined hardness and thickness and elastically deforming when the polypropylene sheet is pressed against the material may be used.
- an elastic material made of silicone or the like can be employed.
- the surface temperature of the fourth cooling roll 16 and the endless belt 17 is set to 14 ° C., but is not limited to this, and any temperature not less than the dew point and not more than 30 can be adopted.
- the temperature of the water sprayed by the cooling water spray nozzle 18 was set at 8 ° C, but is not limited to this, and may be any value lower than the surface temperature of the fourth cooling roll 16 and the endless belt 17. Can be set to
- Polypropylene trade name Idemitsu Polypro E-304GP P. Idemitsu Petrochemical Co., Ltd.
- Cooling water spray amount 200 liters / min
- a low-crystalline polypropylene sheet 11 was obtained in the same manner as in Example 1 except that random polypropylene (trade name: Idemitsu Polypro F 534 N 4 manufactured by Idemitsu Petrochemical Co., Ltd.) was used as the polypropylene.
- random polypropylene trade name: Idemitsu Polypro F 534 N 4 manufactured by Idemitsu Petrochemical Co., Ltd.
- a low-crystalline polypropylene sheet 11 was obtained in the same manner as in Example 1, except that the homopolypropylene of Example 1 to which 3 wt% of petroleum resin was added was used.
- Example 1 Using the homopolypropylene of Example 1 with 0.3% of Gelol MD (manufactured by Shin Nippon Chemical Co., Ltd.) added as a nucleating agent, the reverse of the contact surface of the melt web extruded by a T-die extruder with the cooling roll Air was blown onto the side surface and cooled (ja knife method) to form a film, and a polypropylene sheet was obtained.
- Gelol MD manufactured by Shin Nippon Chemical Co., Ltd.
- Example 2 Using the homopolypropylene of Example 1, a film was formed in the same manner as in Comparative Example 1 to obtain a polypropylene sheet.
- Example 1 Using the homopolypropylene of Example 1 with 0.3% of the nucleating agent of Comparative Example 1 added, a film was formed in the same manner as in Example 1 to obtain a polypropylene sheet.
- Example 1 Using the homopolypropylene of Example 1, limiting the amount of extrusion of the T-die extruder to relieve the stress until the melt tub from the T-die becomes transparent, The extruded melt web was cooled through a water bath (water cooling method), and the obtained polypropylene sheet was further annealed.
- the surface was sandwiched between glass plates, and the influence on the outside of the sheet was eliminated, and the measurement was performed as follows.
- a haze measuring device (NHD-300A, manufactured by Nippon Denshoku Industries Co., Ltd.) is used to irradiate the polypropylene sheet with light, and the sheet is diffused by the total light transmission (Tt), which represents the total amount of transmitted light, and the sheet. It was obtained from the following equation based on the ratio to the amount of transmitted diffused light (Td).
- the total light transmittance (T t) is the sum of the parallel light transmittance (Tp) and the diffuse light transmittance (Td) transmitted coaxially with the incident light.
- the sheet is irradiated with light at an incident angle of 60 degrees, and the reflected light is also received at 60 degrees.
- the reflected light flux s at the time of measurement was measured, and the ratio was calculated by the following equation based on the ratio to the reflected light flux Os from the glass surface having a refractive index of 1.567.
- thermoformability indicates a temperature range in which the molding is performed and the transparency is not lost when the molding is performed by the molding machine.
- the internal haze and the tensile modulus were measured in the same manner as described above. (Table 3)
- the polypropylene sheets 11 obtained in Examples 1 to 3 were quenched by using an endless belt 17 to perform rapid cooling.
- the average spherulite radius is 0. 1 m or more 4 zm less, spherulites density 600 mm 2 or less, the surface gloss of 90% or more, individual density 0.89 58 (- 111 3 below, thickness 50 m or more It can be seen that the low crystalline polypropylene sheet 11 of FIG.
- the sheet 11 of each example had a relatively low melting enthalpeet H of 8083.4 J / kg, and as shown in FIG. 2, had an exothermic peak at a lower temperature side than the melting point. . Therefore, the temperature at which thermoforming can be performed is low (see Table 3), and the temperature range is wide, indicating that the polypropylene sheet 11 is easily thermoformed.
- thermoformed product obtained by thermoforming is excellent in transparency with an internal haze of 1.3 to 1.8%, and has a tensile modulus of 1800 to 2050 MPa and 1700 MPa or more. .
- Comparative Example 1 a nucleating agent was added and a film was formed by an air knife method to obtain a polypropylene sheet. Therefore, although the obtained sheet has a certain degree of transparency, the surface gloss is low, the crystallinity is improved by the effect of increasing the spherulite density by the nucleating agent, the melting enthalpy is high, and the heat is high. It can be seen that the moldability is poor.
- Comparative Example 2 since the film was formed by the air knife method without adding a nucleating agent, it can be seen that the transparency and the surface gloss were low.
- Comparative Example 3 a film was formed in the same manner as in Example 1, but since a nucleating agent was added to the raw resin, the spherulite density increased, the crystallinity increased, and thermoforming was performed. It turns out that the sex is getting worse.
- Comparative Example 4 the film was formed by the water cooling method, and the stress was reduced until the melt web from the T-die became transparent, so that the thermoformability, transparency, and gloss were relatively good. It can be seen that it is not as high as the above examples. Also, since the sheet obtained by the water cooling method does not become flat, it is subjected to annealing treatment to improve the flatness. . Industrial applicability
- the polypropylene sheet according to the present invention can be used as a thermoformed product having high transparency and gloss, and is suitable as a packaging package such as a food packaging container.
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- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Materials Engineering (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Laminated Bodies (AREA)
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2000024078A JP4486202B2 (ja) | 2000-02-01 | 2000-02-01 | 低結晶性ポリプロピレンシート及び低結晶性ポリプロピレンシートの製造方法 |
AT01917842T ATE388191T1 (de) | 2001-04-06 | 2001-04-06 | Polypropylenfolie mit geringer kristallinität |
EP01917842A EP1380614B1 (en) | 2001-04-06 | 2001-04-06 | Lowly crystalline polypropylene sheet |
DE60133133T DE60133133T2 (de) | 2001-04-06 | 2001-04-06 | Polypropylenfolie mit geringer kristallinität |
US10/473,136 US6943229B2 (en) | 2001-04-06 | 2001-04-06 | Low crystallizability polypropylene sheet |
PCT/JP2001/002974 WO2002083768A1 (fr) | 2000-02-01 | 2001-04-06 | Feuille de polypropylene faiblement cristalline |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2000024078A JP4486202B2 (ja) | 2000-02-01 | 2000-02-01 | 低結晶性ポリプロピレンシート及び低結晶性ポリプロピレンシートの製造方法 |
PCT/JP2001/002974 WO2002083768A1 (fr) | 2000-02-01 | 2001-04-06 | Feuille de polypropylene faiblement cristalline |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2002083768A1 true WO2002083768A1 (fr) | 2002-10-24 |
Family
ID=29727308
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2001/002974 WO2002083768A1 (fr) | 2000-02-01 | 2001-04-06 | Feuille de polypropylene faiblement cristalline |
Country Status (5)
Country | Link |
---|---|
US (1) | US6943229B2 (ja) |
EP (1) | EP1380614B1 (ja) |
AT (1) | ATE388191T1 (ja) |
DE (1) | DE60133133T2 (ja) |
WO (1) | WO2002083768A1 (ja) |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8443793B2 (en) * | 2004-04-02 | 2013-05-21 | Innophos, Inc. | Heating apparatus |
US20090179356A1 (en) * | 2008-01-14 | 2009-07-16 | Ama, Inc. | Low Haze Thermoplastic Films, Methods and Manufacturing System For Forming the Same |
JP5421045B2 (ja) * | 2008-10-01 | 2014-02-19 | 富士フイルム株式会社 | フィルムおよびフィルムの製造方法 |
AU2010213187B2 (en) | 2009-02-13 | 2015-07-23 | Bayer Cropscience Aktiengesellschaft | Use of succinate dehydrogenase inhibitors for extending shelf life of fruits and vegetables |
CN103782412B (zh) * | 2011-09-08 | 2016-04-13 | 日新制钢株式会社 | 电池外壳用层叠体及其制造方法以及二次电池 |
US10577159B2 (en) | 2017-04-07 | 2020-03-03 | Berry Plastics Corporation | Drink cup lid |
CN111182818B (zh) * | 2017-08-07 | 2023-07-04 | 贝瑞全球有限公司 | 用于热成型制品的方法和装置 |
USD907997S1 (en) | 2018-08-10 | 2021-01-19 | Berry Global, Inc. | Drink cup lid |
US11891488B2 (en) | 2019-02-06 | 2024-02-06 | Berry Global, Inc. | Polypropylene sheets and articles |
CA3129224A1 (en) | 2019-02-06 | 2020-08-13 | Berry Global, Inc. | Process of forming polymeric material |
USD911168S1 (en) | 2019-03-05 | 2021-02-23 | Berry Global, Inc. | Drink cup lid |
CN111016209A (zh) * | 2020-01-03 | 2020-04-17 | 邢尔路 | 一种新型镂空地垫加工装置及工艺 |
CN112388933B (zh) * | 2020-10-28 | 2022-04-01 | 郑州大学 | 一种高韧性聚丙烯及其制备方法 |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61130018A (ja) * | 1984-11-29 | 1986-06-17 | Idemitsu Petrochem Co Ltd | ポリプロピレンシ−トおよびその製造方法 |
JPS6360726A (ja) * | 1986-09-01 | 1988-03-16 | Toppan Printing Co Ltd | プラスチツクフイルムまたはシ−トの高透明成膜方法 |
EP0614748A1 (en) * | 1993-03-04 | 1994-09-14 | Idemitsu Petrochemical Co., Ltd. | Method for producing thermoplastic resin sheet or film |
EP0803340A2 (en) * | 1995-11-14 | 1997-10-29 | Idemitsu Petrochemical Co., Ltd. | Producing method of a thermoplastic resin sheet and producing apparatus thereof |
JPH101548A (ja) * | 1996-06-18 | 1998-01-06 | Idemitsu Petrochem Co Ltd | ポリプロピレン成形品及びその成形方法 |
JP2000246785A (ja) * | 1999-02-26 | 2000-09-12 | Tokuyama Corp | ポリプロピレンシートの製造方法 |
JP2001030362A (ja) * | 1999-07-23 | 2001-02-06 | Idemitsu Petrochem Co Ltd | 結晶性熱可塑性樹脂シートの製造方法およびポリプロピレン樹脂シート |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5204037A (en) * | 1991-01-25 | 1993-04-20 | Idemitsu Petrochemical Co., Ltd. | Process for production of polypropylene sheets or films |
DE59800952D1 (de) * | 1997-05-02 | 2001-08-09 | Rasselstein Hoesch Gmbh | Verfahren und Vorrichtung zur Kunststoffbeschichtung von Metallband mittels Direkt-Extrusion |
WO1999006155A1 (de) * | 1997-07-18 | 1999-02-11 | Rasselstein Hoesch Gmbh | Verfahren und vorrichtung zur kunststoffbeschichtung von metallband mittels direkt-extrusion |
-
2001
- 2001-04-06 US US10/473,136 patent/US6943229B2/en not_active Expired - Lifetime
- 2001-04-06 WO PCT/JP2001/002974 patent/WO2002083768A1/ja active IP Right Grant
- 2001-04-06 DE DE60133133T patent/DE60133133T2/de not_active Expired - Lifetime
- 2001-04-06 AT AT01917842T patent/ATE388191T1/de not_active IP Right Cessation
- 2001-04-06 EP EP01917842A patent/EP1380614B1/en not_active Expired - Lifetime
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61130018A (ja) * | 1984-11-29 | 1986-06-17 | Idemitsu Petrochem Co Ltd | ポリプロピレンシ−トおよびその製造方法 |
JPS6360726A (ja) * | 1986-09-01 | 1988-03-16 | Toppan Printing Co Ltd | プラスチツクフイルムまたはシ−トの高透明成膜方法 |
EP0614748A1 (en) * | 1993-03-04 | 1994-09-14 | Idemitsu Petrochemical Co., Ltd. | Method for producing thermoplastic resin sheet or film |
EP0803340A2 (en) * | 1995-11-14 | 1997-10-29 | Idemitsu Petrochemical Co., Ltd. | Producing method of a thermoplastic resin sheet and producing apparatus thereof |
JPH101548A (ja) * | 1996-06-18 | 1998-01-06 | Idemitsu Petrochem Co Ltd | ポリプロピレン成形品及びその成形方法 |
JP2000246785A (ja) * | 1999-02-26 | 2000-09-12 | Tokuyama Corp | ポリプロピレンシートの製造方法 |
JP2001030362A (ja) * | 1999-07-23 | 2001-02-06 | Idemitsu Petrochem Co Ltd | 結晶性熱可塑性樹脂シートの製造方法およびポリプロピレン樹脂シート |
Also Published As
Publication number | Publication date |
---|---|
US6943229B2 (en) | 2005-09-13 |
DE60133133D1 (de) | 2008-04-17 |
EP1380614A4 (en) | 2006-11-02 |
EP1380614A1 (en) | 2004-01-14 |
EP1380614B1 (en) | 2008-03-05 |
US20040101703A1 (en) | 2004-05-27 |
DE60133133T2 (de) | 2009-06-25 |
ATE388191T1 (de) | 2008-03-15 |
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