WO2017175878A1 - Film poreux étiré et son procédé de production - Google Patents

Film poreux étiré et son procédé de production Download PDF

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Publication number
WO2017175878A1
WO2017175878A1 PCT/JP2017/015207 JP2017015207W WO2017175878A1 WO 2017175878 A1 WO2017175878 A1 WO 2017175878A1 JP 2017015207 W JP2017015207 W JP 2017015207W WO 2017175878 A1 WO2017175878 A1 WO 2017175878A1
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Prior art keywords
mass
porous film
stretched porous
film
machine direction
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PCT/JP2017/015207
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English (en)
Japanese (ja)
Inventor
田中　伸幸
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株式会社トクヤマ
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Application filed by 株式会社トクヤマ filed Critical 株式会社トクヤマ
Priority to CN201780014492.1A priority Critical patent/CN108779279A/zh
Priority to JP2018510686A priority patent/JP6859324B2/ja
Publication of WO2017175878A1 publication Critical patent/WO2017175878A1/fr

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    • 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
    • B29C67/00—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00
    • B29C67/20—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00 for porous or cellular articles, e.g. of foam plastics, coarse-pored
    • 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
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/04—Homopolymers or copolymers of ethene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/10—Homopolymers or copolymers of propene

Definitions

  • the present invention relates to a stretched porous film and a method for producing the same. More specifically, the present invention relates to a polyolefin stretched porous film having a high machine direction low strain extension strength, suitable for pitch printing, and having good moisture permeability, and a method for producing the same.
  • stretched porous polyolefin films are used for sanitary materials such as disposable diapers and sanitary napkins, functional packaging materials such as desiccants and disposable warmers, simple clothing such as disposable gloves and rain feathers, waterproof building materials such as house wrap, and multi-agricultural methods. It is widely used for agricultural applications such as industrial sheets and waste disposal applications such as compost-coated sheets.
  • the stretched porous film used for the sanitary material application is not only moisture-permeable and breathable, but also has water resistance and contradictory properties. Liquid leakage resistance and flexibility in accordance with movement during wearing are required.
  • polyethylene has been used as a polyolefin resin from the viewpoint of flexibility as a raw material for stretched porous films for paper diapers, but such a film is excellent in flexibility but is stretched during printing.
  • a polyolefin resin (1) at least one kind of high-density polyethylene and polypropylene is 10 to 70% by mass, (2) linear low-density polyethylene is 88 to 15% by mass, and (3) A porous film obtained by stretching a resin composition containing 3 to 15% by weight of branched low density polyethylene and an inorganic filler is shown.
  • the obtained stretched porous film has a considerably high 5% tensile strength, but it is still the highest at 31 g / 25 mm (3.2 N / 25 mm). With this strength, the printing pitch is stable. I wasn't satisfied with my sex at a practical level.
  • JP-A-2015-229719 discloses (A) 20 to 80 parts by mass of a linear polyethylene resin having a density of 0.910 to 0.929 g / cm 3 and (B) a density of 0.930 to 0.965 g / cm 3.
  • polyethylene resin with a density of 0.930 to 0.965 g / cm 3 includes some of the category of low density polyethylene, but most of them correspond to high density polyethylene. Therefore, when using high-density polyethylene as the component (B), it functions as a component that increases the 5% stretch strength of the stretched porous film, similarly to the propylene homopolymer (D). In the examples, only one example with a low draw ratio of 2.5 times was specifically performed (see [0065]), and it was also disclosed that the 5% stretch strength could be improved to a sufficient value. Absent.
  • the object of the present invention is to have high moisture permeability and excellent texture, small variation in printing pitch during printing, and small variation in printing pitch of printed film rolls during storage,
  • the object is to provide a stretched polyolefin porous film.
  • Another object of the present invention is to use a resin composition having a special composition with a relatively small amount of polypropylene as a polyolefin resin, and to produce a stretched porosity having the above-mentioned properties, which is produced by employing a large stretch ratio.
  • Still another object of the present invention is to provide a stretched porous film having a 5% stretch strength in the machine direction at a level not known in the prior art and having a low printing pitch while maintaining high moisture permeability and excellent texture. There is.
  • a resin composition containing 100 parts by mass of a polyolefin comprising 85 to 50% by mass of linear low density polyethylene, 10 to 35% by mass of branched low density polyethylene, and 5 to 25% by mass of polypropylene, and 80 to 200 parts by mass of an inorganic filler.
  • a stretched porous film comprising 5% elongation strength in the machine direction of 3.5 N / 25 mm or more, moisture permeability of 2000 g / m 2 ⁇ 24 h or more, and basis weight of 10 to 35 g / m 2 Achieved.
  • the stretched porous film of the present invention comprises (1) 85 to 50% by mass of linear low density polyethylene, (2) 10 to 35% by mass of branched low density polyethylene, and (3) 5 to 25% by mass of polypropylene (PP). And 100 parts by mass of a polyolefin and 80 to 200 parts by mass of an inorganic filler.
  • LLDPE Linear low density polyethylene
  • LLDPE which is a polyolefin, is composed of a copolymer of ethylene and a small amount of an ⁇ -olefin, and has a linear polyethylene main chain and a carbon number of 2 to It has about 6 short chain branches.
  • the density of LLDPE is preferably 0.910 to 0.950 g / cm 3 , more preferably 0.915 to 0.945 g / cm 3 .
  • the melt index (MI) of LLDPE is preferably 1 to 8 g / 10 min. And particularly preferably 2.0 to 7.5 g / 10 min. It is.
  • the density, or more preferably, the density and the melt index are in the above ranges, the stretched porous film is excellent in flexibility, air permeability, and liquid leakage resistance.
  • the said density is a density measured by JISK7112, and the measuring method of the density of other resin is also the same as this.
  • the melt index is a value measured by the A method at 190 ° C.
  • linear low density polyethylene examples include ethylene-propylene, ethylene- (1-butene), ethylene- (1-hexene), ethylene- (4-methyl-1-pentene), and ethylene- (1- Octene) and the like.
  • the amount of linear low density polyethylene used is required to be 85 to 50% by mass of the total amount of polyolefin in order to greatly affect the strength and stiffness of the obtained stretched porous film. 80 to 55% by mass. When the amount used exceeds the above range, the strength of the stretched porous film and mechanical strength such as stiffness are lowered, and when it is less, the stiffness of the stretched porous film increases.
  • LDPE Branched low-density polyethylene
  • PE-LD low-density polyethylene
  • the density of LDPE having long chain branches is preferably 0.910-0. 940 g / cm 3
  • LDPE can be usually synthesized by polymerizing ethylene in the presence of a radical polymerization catalyst under high pressure. Among these, those having a density of 0.915 to 0.930 g / cm 3 are preferable.
  • the melt index is 1 to 8 g / 10 min. In particular, 2.0 to 7.0 g / 10 min.
  • the resin composition can have the extrusion characteristics and moldability of the film and the mechanical strength required for the stretched porous film.
  • the amount of branched low density polyethylene (LDPE) used needs to be 10 to 35% by mass of the total amount of polyolefin. Preferably, it is 13 to 35% by mass of the total amount of polyolefin.
  • the amount used affects the uniformity of the thickness of the resulting stretched porous film. If the amount of LDPE used exceeds the above range, the frequency of pinholes in the film will increase. On the other hand, if the amount is small, the uniformity of the film thickness is deteriorated, and draw resonance is likely to occur in the film.
  • Polypropylene constituting the polyolefin is not particularly limited, but has a density of 0.890 to 0.940 g / cm 3 and a melt index of 1 to 8 g / 10 min. It is preferable that When the density and melt index are within the above ranges, the resin composition can have the extrusion characteristics and moldability of the film, and the mechanical strength required for the stretched porous film.
  • Polypropylene is a homopolymer of propylene or a copolymer of propylene and a small amount of other ⁇ -olefins. Specific examples include a propylene homopolymer, a propylene-ethylene copolymer, and a propylene-ethylene-EPR (ethylene-propylene rubber) copolymer.
  • the propylene unit content of the propylene-ethylene copolymer is preferably 60 mol% or more.
  • the amount of polypropylene used is 5 to 25% by mass of the total amount of polyolefin. Preferably, it is 7 to 22% by mass of the total amount of polyolefin.
  • Polypropylene is an important component for increasing the 5% tensile strength in the machine direction of the obtained stretched porous film, but when this is blended in a large amount exceeding the above upper limit, the stretched porosity obtained as described above. In the conductive film, the moisture permeability is lowered and the texture is also deteriorated.
  • polypropylene is blended in less than the lower limit, the 5% tensile strength cannot be increased to the value specified by the present invention.
  • the three types of polyolefins used in the present invention may be resins manufactured using a multisite catalyst such as a Ziegler catalyst, or a resin manufactured using a single site catalyst such as a metallocene catalyst. Also good.
  • the melt index of polyolefin comprising (1) linear low density polyethylene, (2) branched low density polyethylene, and (3) polypropylene is 1-8 g / 10 min.
  • inorganic fillers can be used without limitation, for example, inorganic salts such as calcium carbonate, barium sulfate, calcium sulfate, barium carbonate, magnesium hydroxide, aluminum hydroxide, zinc oxide, magnesium oxide, Examples thereof include inorganic oxides such as silica, silicates such as mica, vermiculite and talc, and organic metal salts.
  • inorganic oxides such as silica, silicates such as mica, vermiculite and talc, and organic metal salts.
  • calcium carbonate can be particularly preferably used because of cost performance and releasability from the polyethylene resin.
  • the average particle size of the inorganic filler is preferably 10 ⁇ m or less, more preferably 0.5 to 5.0 ⁇ m, and even more preferably 0.7 to 3.0 ⁇ m.
  • the average particle size of the inorganic filler is preferably one that has been surface-treated in order to improve dispersibility in the resin.
  • the surface treating agent those capable of hydrophobizing the surface by coating the surface of the inorganic filler are preferable, and examples thereof include fatty acids, higher fatty acids, metal salts thereof, waxes and the like.
  • the amount of the surface treatment agent is not particularly limited, but is preferably about 0.5 to 2.0% by mass, more preferably 1.5% by mass or less, and 1.0% by mass with respect to the inorganic filler. It is particularly preferred that
  • the polyolefin resin composition in the present invention includes the polyolefin and an inorganic filler, and the composition thereof is 80 to 200 parts by mass of the inorganic filler with respect to 100 parts by mass of the polyolefin, and preferably 100 parts by mass of the polyolefin.
  • the inorganic filler is 85 to 150 parts by mass.
  • the mass ratio of the inorganic filler to the polyolefin is smaller than the above range, the interface between the polyolefin and the inorganic filler is peeled off, and the void generation frequency per unit area is reduced, so adjacent voids are difficult to communicate with each other.
  • the air permeability deteriorates.
  • the plasticizer content is preferably less than 2 parts by mass, and more preferably less than 1 part by mass.
  • the plasticizer is a general term for compounds that improve the plasticity of the film and impart flexibility to the film.
  • the melt index of the resin composition increases and it becomes difficult to obtain a high 5% tensile strength.
  • the type of the plasticizer is not particularly limited, and examples thereof include fatty acids, higher fatty acids, low molecular weight polyethylene, epoxidized soybean oil, polyethylene glycol, and fatty acid esters. Moreover, you may mix
  • additives examples include antioxidants, heat stabilizers, light stabilizers, ultraviolet absorbers, neutralizers, lubricants, antifogging agents, antiblocking agents, antistatic agents, slip agents, and coloring agents.
  • a small amount of a resin component other than that constituting the polyolefin may be blended in the resin composition as long as the effects of the present invention are not impaired. Specifically, if it is within 5 parts by mass, more preferably within 2.5 parts by mass with respect to 100 parts by mass of polyolefin, it is allowed to blend other resin components.
  • the melt index of the resin composition is 2 g / 10 min. Preferably, it is 2 g / 10 min. 5 g / 10 min.
  • the 5% stretch strength in the machine direction of the stretched porous film is 3.5 N / 25 mm or more, preferably 3.7 N / 25 mm or more, and more preferably 4.0 N / 25 mm or more. .
  • the 5% tensile strength in the machine direction is preferably 10.0 N / 25 mm or less, more preferably 6.0 N / 25 mm or less. If it exceeds the above range, the bending resistance increases and the texture becomes insufficient.
  • the 5% tensile strength in the machine direction can be determined according to JIS K 7127.
  • the moisture permeability of the stretched porous film is 2000 g / m 2 ⁇ 24 h or more, and preferably 2100 g / m 2 ⁇ 24 h or more.
  • the moisture permeability is in the above range, the breathability and moisture permeability are excellent.
  • the upper limit is not particularly limited moisture permeability, mechanical properties, water resistance, and liquid leakage resistance reasons, preferably 10000g / m 2 ⁇ 24h, and most preferably, 5000g / m 2 ⁇ 24h It is.
  • the moisture permeability can be determined by ASTM E96B.
  • the heat shrinkage rate (%) after treatment for 24 hours at 50 ° C. in the machine direction of the stretched porous film is preferably 3.0% or less, and more preferably 2.5% or less.
  • the fact that the thermal shrinkage rate in the machine direction is small makes it possible to suppress the elongation of the film to be small relative to the line tension applied in the machine direction during printing, in addition to increasing the 5% elongation strength. Therefore, the smaller the heat shrinkage rate (%) in the machine direction, the smaller the printing pitch deviation can be suppressed, but practically 0.5% is the lower limit.
  • the heat shrinkage rate (%) in the machine direction is expressed as a ratio of shrinkage of the film length in the machine direction before and after being left at a temperature of 50 ° C. for 24 hours. Specifically, a 15 cm ⁇ 15 cm sample is cut out from the stretched porous film, and marked lines are inserted so that the distance between marked lines is 10 cm in the machine direction. After being allowed to stand at a temperature of 50 ° C. for 24 hours, it is cooled to room temperature and the length between marked lines is measured.
  • the heat shrinkage rate (%) in the machine direction of the present invention is calculated from the following formula (I).
  • the basis weight of the stretched porous film is 10 to 35 g / m 2 . It is preferably 11 to 32 g / m 2 , and more preferably 12 to 30 g / m 2 .
  • a stretched porous film excellent in air permeability, moisture permeability and mechanical strength can be obtained. If it is larger than this range, it will be difficult to satisfy the moisture permeability of the film, and if it is smaller, the mechanical strength of the film will be lowered. Below, the manufacturing method of the stretched porous film of this invention is demonstrated.
  • the stretched porous film of the present invention is not limited by its production method, but is usually (1) 85 to 50% by mass of linear low density polyethylene and (2) 10 to 35 of branched low density polyethylene.
  • a resin composition comprising 100% by mass of polyolefin and 100% by mass of (3) 5-25% by mass of polypropylene and 80-200 parts by mass of an inorganic filler is formed into a film, and the resulting film is machined.
  • the film is preferably stretched 2.6 to 5.0 times in the direction and then preferably at a temperature in the range of 70 to 95 ° C., preferably at least 0 while maintaining the shrinkage in the machine direction preferably at 3 to 20%. It can be manufactured by heat setting for 2 seconds.
  • the polyolefin and the inorganic filler, and further, the additive to be blended as necessary are mixed.
  • a mixing method a known method can be employed.
  • the mixing is preferably performed for about 5 minutes to 1 hour using a mixer such as a Henschel mixer, a super mixer, or a tumbler mixer.
  • the obtained mixture is preferably melt-kneaded and pelletized.
  • a kneading method a known method can be adopted.
  • a kneading machine such as a high kneading type twin screw extruder or a tandem kneading machine is used to knead by a method such as strand cut, hot cut or underwater cut.
  • Premixing, kneading and pelletizing as described above are preferable because uniform dispersion of the resin composition can be promoted.
  • it can be directly put into a kneader without mixing and pelletized.
  • the obtained pellets are formed into a film with a circular die or a T die attached to the tip of the extruder.
  • a known method such as a nip roll method, an air knife method, or an air chamber method can be employed.
  • the film can be formed by directly feeding the resin composition into an extruder without mixing and kneading.
  • the film obtained by forming the film is stretched by a known method such as a roll stretching method or a tenter stretching method to obtain a stretched porous film.
  • the stretch ratio should be at least 2.6 to 5 times in the machine direction. is important. That is, the constituent resin composition is such that the amount of the polypropylene component is small and the 5% tensile strength is difficult to increase. In the present invention, however, the film made of the resin composition is stretched in this way. By carrying out at such a specific high magnification, a high value of 3.5 N / 25 mm or more can be achieved as the physical property value.
  • the draw ratio in the machine direction is preferably 2.8 times or more, more preferably 3.1 times or more.
  • the upper limit is preferably 4.5 times, more preferably 4.0 times.
  • the stretching may be single-stage stretching or multi-stage stretching, but is preferably single-stage stretching in order to improve the low strain elongation strength. Therefore, specifically, it is particularly preferable to perform one-stage stretching in the machine direction.
  • the stretching temperature is not particularly limited as long as it is at room temperature or higher and lower than the softening point of the resin composition. If the stretching temperature is too lower than the above range, unevenness of stretching tends to occur, and the thickness tends to be non-uniform. If the temperature is too high, the resin melts and air permeability and moisture permeability deteriorate.
  • the stretching temperature can be appropriately adjusted depending on the desired physical properties and in combination with the stretching ratio. Subsequently, the stretched porous film of the present invention heat-fixes the stretched porous film after stretching as a method of suppressing thermal shrinkage in the stretching direction.
  • the heat setting is a heat treatment performed in an environment in which a dimensional change is not caused in a state where a stretched film is maintained in a tensioned state due to stretching.
  • the heat fixation can suppress elastic recovery, shrinkage due to heat, squeezing and the like during storage.
  • a heat setting method when a roll stretching method is adopted, a method of heating the stretched film with a heated roll (annealing roll) can be mentioned.
  • annealing roll a heated roll
  • tenter stretching method a method of heating the film in the vicinity of the tenter outlet can be mentioned.
  • the heat setting temperature is 70 to 95 ° C, and preferably 80 to 95 ° C.
  • the heat setting time is 0.2 seconds or more, preferably 0.5 seconds or more, and more preferably 1 second or more.
  • the time is a time during which the film is held at the above temperature.
  • the heat setting time in the case of two or more rolls is the sum of the time during which the film is in contact with each roll.
  • the time is heated at the tenter outlet and maintained at the above temperature, and when divided and heated in multiple times, it is the sum of the times of heating.
  • the heat setting time is not 0.2 seconds or more, heat setting is insufficient and heat shrinkage is increased.
  • the fixing time is preferably 20 seconds or shorter, and more preferably 15 seconds or shorter. If the heat fixing time is too long, it cannot be generally described because it depends on the combination with the heat fixing temperature, but damage due to heat increases, and air permeability and moisture permeability may be reduced.
  • the shrinkage in the machine direction at the time of heat setting is 3 to 20%, preferably 5 to 15%.
  • the shrinkage rate is determined by the speed difference between the anneal roll and the subsequent roll. If the tenter stretching method is adopted, the clip width at both ends after heating is narrowed. It is decided by. If the shrinkage rate is too small, the heat-shrinkage of the resulting stretched porous film becomes large. If the shrinkage rate is too large, the film is slackened during production, and stable production cannot be performed.
  • the stretched porous film produced as described above has a 5% elongation strength in the machine direction in addition to the physical properties conventionally required for sanitary material applications such as paper diapers, and is particularly suitable for printing.
  • the pitch does not shift and a clear pattern or the like can be obtained, it is preferably used as a back sheet of a paper diaper to be printed.
  • the stretched porous film of the present invention is usually wound up as a roll and provided as a roll for printing.
  • the stretched porous film on which printing has been performed is again wound up as a roll and supplied for final use.
  • a roll subjected to printing does not change its winding shape even during long-term storage for more than one month, and the printing pitch does not fluctuate later during storage. Can be used with good yield.
  • the stretched porous film of the present invention is suitably used for moisture permeable waterproof sheets that require weather resistance and light resistance, such as building material use, agricultural use, and waste treatment use, by laminating with a breathable reinforcing material.
  • the breathable reinforcing material is not particularly limited, and for example, a nonwoven fabric, a woven fabric, a split fabric, a mesh, a net, a filter, paper, a fabric, or the like can be used.
  • the material of the breathable reinforcing material is not particularly limited, and polyolefin-based, polyester-based, and nylon-based materials can be used.
  • a heat fusion method is used.
  • the surface layer contains a polyethylene resin having a melting point peak of 130 ° C. or lower.
  • Example 1 Examples and Comparative Examples are shown below, but the present invention is not limited to these Examples.
  • the physical-property value described in the Example and the comparative example was measured by the method shown below.
  • a sample having a width of 25 mm and a length (machine direction) of 150 mm was cut from a 5% stretch strength stretched porous film. According to JIS K 7127, the distance between chucks is 50 mm, and the pulling speed is 200 mm / min. Then, the strength (stress) in the machine direction was measured when the sample (distance between chucks) was extended by 5% (2.5 mm). 5) Heat shrinkage in machine direction (%) A 15 cm ⁇ 15 cm sample is cut out from the stretched porous film, and marked lines are inserted so that the distance between marked lines is 10 cm in the machine direction. After being allowed to stand at a temperature of 50 ° C. for 24 hours, it is cooled to room temperature and the length between marked lines is measured.
  • the heat shrinkage rate (%) in the machine direction of the present invention is calculated from the following mathematical formula (I).
  • Heat shrinkage in machine direction (%) ⁇ (10 cm-measurement length cm) / 10 cm ⁇ ⁇ 100
  • Example 1 Linear low density polyethylene A [manufactured by Dow Chemical Co., Ltd., trade name: Dourex 2035G, density: 0.919 g / cm 3 , melt index: 6.0 g / 10 min.
  • the average particle size is 2.0 ⁇ m Calcium carbonate G (product name: FL-520, manufactured by Imeris Minerals Co., Ltd.) 102 parts by mass, additive H [titanium oxide (Huntsman Co., Ltd., product name: TR28) 50% by mass, hindered phenol-based heat stabilizer (Ciba Japan Co., Ltd., product name: IRGANOX 3114) 20% by mass, phosphorus-based heat stabilizer (Ciba Japan Co., Ltd.) A resin composition containing 2 parts by mass of a product, product name: IRGAFOS168) 30% by mass mixture] was granulated, and film forming was performed.
  • a ⁇ 30 mm twin screw extruder with a vent was used to extrude into a strand at a cylinder temperature of 180 ° C., cooled in a water bath, cut and dried to about 5 mm to obtain pellets.
  • the pellet was formed into a film using a ⁇ 400 mmT die film forming machine.
  • lip clearance 1.5 mm
  • die temperature 230 ° C.
  • air gap 105 mm
  • take-up speed 10 m / min.
  • the cast roll temperature was 20 ° C. Furthermore, it was uniaxially stretched only in the machine direction with a roll stretching machine set at 60 ° C.
  • the obtained stretched porous film was evaluated for basis weight, moisture permeability, 5% stretch strength, and heat shrinkage rate. The results are shown in Table 2.
  • the obtained stretched porous film had good moisture permeability of 2000 g / m 2 ⁇ 24 h or more and good texture. Further, the 5% tensile strength maintained a high value.
  • Examples 2-6, 10-13 A film was molded and evaluated in the same manner as in Example 1 except that the composition (Table 1) was changed. The results are shown in Table 2.
  • Example 7 A film was molded and evaluated in the same manner as in Example 2 except that the stretching ratio was 2.8 times as the stretching condition. The results are shown in Table 2.
  • the obtained stretched porous film had good moisture permeability of 2000 g / m 2 ⁇ 24 h or more and good texture. Further, the 5% stretch strength was kept high and the heat shrinkage rate in the machine direction was kept low.
  • Example 8 A film was molded and evaluated in the same manner as in Example 2 except that the stretching ratio was 2.6 times as the stretching condition. The results are shown in Table 2.
  • the obtained stretched porous film had good moisture permeability of 2000 g / m 2 ⁇ 24 h or more and good texture. Further, the 5% stretch strength was kept high and the heat shrinkage rate in the machine direction was kept low.
  • Example 9 A film was molded and evaluated in the same manner as in Example 2 except that the stretching ratio was 3.8 times as the stretching condition. The results are shown in Table 2. The obtained stretched porous film had good moisture permeability of 2000 g / m 2 ⁇ 24 h or more and good texture. Further, the 5% stretch strength was kept high and the heat shrinkage rate in the machine direction was kept low. Comparative Examples 1-4 A film was molded and evaluated in the same manner as in Example 1 except that the composition was changed to the composition shown in Table 1. The results are shown in Table 2.
  • Comparative Example 5 A film was molded and evaluated in the same manner as in Example 1 except that the stretching ratio was 1.7 times as the stretching condition. The results are shown in Table 2.
  • Comparative Example 6 A film was molded and evaluated in the same manner as in Example 2 except that the stretching ratio was 2.0 times as the stretching conditions. The results are shown in Table 2. From the results of Comparative Examples 1 to 6, the moisture permeability was 2000 g / m 2 ⁇ 24 h or less, the 5% tensile strength was a low value, and there were many pinholes, and physical properties could not be evaluated.
  • C Branched low density polyethylene [Mitsui DuPont Polychemical Co., Ltd., trade name: Mirason 16P, density: 0.917 g / cm 3 , melt index: 3.7 g / 10 min. ]
  • D Branched low density polyethylene [manufactured by Asahi Kasei Chemicals Corporation, trade name: L1850K, density: 0.918 g / cm 3 , melt index: 6.7 g / 10 min. ]
  • E Polypropylene [manufactured by Prime Polymer Co., Ltd., trade name: F-704NP, density: 0.900 g / cm 3 , MI: 2.8 g / 10 min.
  • F polypropylene [manufactured by Nippon Polypro Co., Ltd., trade name: Wintech WFX4M, density: 0.900 g / cm 3 , MI: 2.8 g / 10 min. ]
  • G Calcium carbonate [Product name: FL-520, manufactured by Imerizu Minerals Co., Ltd.]
  • H Additive [Titanium oxide (manufactured by Huntsman Co., Ltd., trade name: TR28) 50% by mass, hindered phenol thermal stabilizer (manufactured by Ciba Japan Co., Ltd., trade name: IRGANOX3114) 20% by mass, phosphorus system Thermal Stabilizer (Ciba Japan Co., Ltd., trade name: IRGAFOS168) 30% by mass mixture] (Extension conditions) * 1: Uniaxial stretching (stretching ratio: 3.2 times) was performed only in the machine direction with a roll stretching machine set at 60 ° C., and then in-line annealing was performed

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  • Molding Of Porous Articles (AREA)

Abstract

L'invention concerne un film poreux étiré comprenant une composition de résine qui comprend de 80 à 200 parties en masse d'une charge inorganique pour 100 parties en masse d'une polyoléfine qui comprend de 85 à 50 % en masse d'un polyéthylène linéaire basse densité, 10 à 35 % en masse d'un polyéthylène basse densité ramifié, et 5 à 25 % en masse de polypropylène. Le film poreux étiré a une résistance à 5 % d'allongement dans le sens machine d'au moins 3,5 N/25 mm, une vitesse de transmission de vapeur d'eau d'au moins 2000 g/m2∙24 h, et une masse par unité de surface de 10-35 g/m2. Le film poreux étiré présente une excellente aptitude à l'impression de pas et une excellente texture de film.
PCT/JP2017/015207 2016-04-08 2017-04-06 Film poreux étiré et son procédé de production WO2017175878A1 (fr)

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CN201780014492.1A CN108779279A (zh) 2016-04-08 2017-04-06 拉伸多孔性膜及其制造方法
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CN109705446A (zh) * 2018-12-27 2019-05-03 佛山佛塑科技集团股份有限公司 一种改性聚烯烃母料及其制备方法和应用
CN109734989A (zh) * 2018-12-27 2019-05-10 佛山佛塑科技集团股份有限公司 一种薄膜及其制备方法和应用
WO2019130990A1 (fr) * 2017-12-26 2019-07-04 株式会社トクヤマ Film poreux étiré et son procédé de production
JPWO2019107555A1 (ja) * 2017-11-30 2020-11-26 株式会社トクヤマ 延伸多孔性フィルムおよびその製造方法
WO2022104065A1 (fr) * 2020-11-12 2022-05-19 Hanwha Azdel, Inc. Procédé de stratification en ligne pour la production de panneaux composites thermoplastiques décoratifs
WO2023074731A1 (fr) * 2021-10-29 2023-05-04 株式会社トクヤマ Film poreux étiré et procédé de production associé

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CN110343371A (zh) * 2019-07-11 2019-10-18 惠州市国宏科技有限公司 一种网状pet防水传声片材及其制备方法和应用
JP7448407B2 (ja) * 2020-04-09 2024-03-12 タキロンシーアイ株式会社 伸縮フィルム及びその製造方法

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JPWO2019107555A1 (ja) * 2017-11-30 2020-11-26 株式会社トクヤマ 延伸多孔性フィルムおよびその製造方法
WO2019130990A1 (fr) * 2017-12-26 2019-07-04 株式会社トクヤマ Film poreux étiré et son procédé de production
JPWO2019130990A1 (ja) * 2017-12-26 2020-12-10 株式会社トクヤマ 延伸多孔性フィルムおよびその製造方法
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CN109734989A (zh) * 2018-12-27 2019-05-10 佛山佛塑科技集团股份有限公司 一种薄膜及其制备方法和应用
WO2022104065A1 (fr) * 2020-11-12 2022-05-19 Hanwha Azdel, Inc. Procédé de stratification en ligne pour la production de panneaux composites thermoplastiques décoratifs
WO2022104075A3 (fr) * 2020-11-12 2022-06-23 Hanwha Azdel, Inc. Procédé de stratification en ligne de production de panneaux composites thermoplastiques avec des couches de film texturées
WO2023074731A1 (fr) * 2021-10-29 2023-05-04 株式会社トクヤマ Film poreux étiré et procédé de production associé

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