WO2013105320A1 - Procédé de fabrication de mousse de latex - Google Patents

Procédé de fabrication de mousse de latex Download PDF

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Publication number
WO2013105320A1
WO2013105320A1 PCT/JP2012/076512 JP2012076512W WO2013105320A1 WO 2013105320 A1 WO2013105320 A1 WO 2013105320A1 JP 2012076512 W JP2012076512 W JP 2012076512W WO 2013105320 A1 WO2013105320 A1 WO 2013105320A1
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WIPO (PCT)
Prior art keywords
latex
turbine blade
disk
stirring
blade
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Ceased
Application number
PCT/JP2012/076512
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English (en)
Japanese (ja)
Inventor
高井　淳
芳明 宮本
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Sumitomo Rubber Industries Ltd
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Sumitomo Rubber Industries Ltd
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Publication date
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Publication of WO2013105320A1 publication Critical patent/WO2013105320A1/fr
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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
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/30—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof by mixing gases into liquid compositions or plastisols, e.g. frothing with air
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/05—Stirrers
    • B01F27/11—Stirrers characterised by the configuration of the stirrers
    • B01F27/111—Centrifugal stirrers, i.e. stirrers with radial outlets; Stirrers of the turbine type, e.g. with means to guide the flow
    • B01F27/1111—Centrifugal stirrers, i.e. stirrers with radial outlets; Stirrers of the turbine type, e.g. with means to guide the flow with a flat disc or with a disc-like element equipped with blades, e.g. Rushton turbine
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
    • B01F27/80—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis
    • B01F27/90—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis with paddles or arms 
    • 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
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/34—Auxiliary operations
    • B29C44/3442—Mixing, kneading or conveying the foamable material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F2215/00—Auxiliary or complementary information in relation with mixing
    • B01F2215/04—Technical information in relation with mixing
    • B01F2215/0413—Numerical information
    • B01F2215/0418—Geometrical information
    • B01F2215/0431—Numerical size values, e.g. diameter of a hole or conduit, area, volume, length, width, or ratios thereof
    • 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
    • B29K2007/00—Use of natural rubber as moulding 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
    • B29K2075/00—Use of PU, i.e. polyureas or polyurethanes or derivatives thereof, as moulding 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
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/04—Condition, form or state of moulded material or of the material to be shaped cellular or porous
    • 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
    • B29L2031/48—Wearing apparel
    • B29L2031/4842—Outerwear
    • B29L2031/4864—Gloves
    • 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
    • C08J2321/00—Characterised by the use of unspecified rubbers
    • C08J2321/02—Latex
    • 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
    • C08J2327/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers
    • C08J2327/02—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment
    • C08J2327/04—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
    • C08J2327/06—Homopolymers or copolymers of vinyl chloride
    • 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
    • C08J2333/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers
    • C08J2333/04—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers esters
    • C08J2333/06—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers esters of esters containing only carbon, hydrogen, and oxygen, the oxygen atom being present only as part of the carboxyl radical
    • 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
    • C08J2375/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
    • C08J2375/04—Polyurethanes

Definitions

  • the present invention relates to a production method for producing latex foam by foaming rubber or resin latex by stirring.
  • Rubber and resin latexes are excellent in processability for processing into various article shapes, and can form articles excellent in strength and the like. For this reason, it is widely used as a forming material in various applications such as rubber gloves (including rubber gloves and resin gloves, the same applies hereinafter). For example, by immersing a mold corresponding to the three-dimensional shape of a rubber glove in the latex and pulling it up, after attaching the latex to the surface of the mold, in the case of rubber latex, the mold is heated and vulcanized together with the resin. In the case of this latex, the rubber gloves corresponding to the three-dimensional shape of the mold can be produced by drying and then curing as necessary and then removing from the mold.
  • the formed article when latex is foamed by stirring to form a latex foam containing air, and the latex foam is used as a material for forming an article such as a rubber glove, the formed article has a porous structure and improves properties such as flexibility. Or providing new characteristics such as liquid absorbency, and further, the weight of the article can be reduced.
  • the added value of an article formed using latex foam is determined by the size (average bubble diameter) and amount (bubble content) of bubbles contained in the article. Therefore, it is important to control the average bubble diameter and bubble content of the latex foam that affects these.
  • the average bubble diameter is important, and the smaller the average bubble diameter, the denser the bubbles, the more the relative bubble surface area can be increased when compared with the same bubble content while maintaining the strength of the article in an appropriate range. Therefore, characteristics such as liquid absorbency due to the porous structure can be further improved.
  • wet grip properties can be improved by imparting liquid absorbency with a porous structure on the surface.
  • the average bubble diameter of the latex foam as the forming material is small because the average bubble diameter of the rubber glove to be formed can be reduced and the liquid absorbency is improved.
  • the average cell diameter is preferably 300 ⁇ m or less, and more preferably about 100 ⁇ m or less.
  • the bubble content of the latex foam is preferably as small as possible.
  • the bubble content is preferably 60% by volume or less, and more preferably about 40% by volume or less.
  • Methods for foaming latex are roughly classified into chemical foaming and physical foaming.
  • the chemical foaming method uses a foaming agent that generates gas by heating or chemical reaction. By blending a foaming agent in the latex, gas is generated from the foaming agent by heating or the like, and the latex is included in the latex, the latex can be foamed.
  • the physical foaming method for example, a method of blowing air directly into the latex, or stirring and foaming the latex, that is, by mixing the lower latex (liquid) and the upper air from the liquid level by gas-liquid mixing, A method of including air as bubbles in latex is known.
  • the physical foaming method has the advantage that the material cost can be reduced by the amount that does not require a foaming agent compared with the chemical foaming method, but it is difficult to control the average bubble diameter and bubble content of latex foam. Yes.
  • Patent Document 1 it has been studied to disperse the generated bubbles by stirring them using a stirrer equipped with a propeller blade as a stirring blade after bubbling gas into latex.
  • Patent Document 2 it is considered that the latex is stirred and foamed using a continuous mechanical foaming machine, a home mixer, or the like.
  • the bubbles in the latex can be made finer to some extent than usual.
  • these methods may not be able to reduce the bubbles to a sufficient level, for example, a level capable of imparting good liquid absorbency to the rubber glove as described above.
  • the number of processes increases and the apparatus becomes complicated, and the time required for the work becomes long, resulting in a decrease in latex foam productivity and an increase in production cost.
  • An object of the present invention is to provide a method for producing a latex foam, which can produce a latex foam with fine bubbles to a sufficient level, with a simpler apparatus, with fewer steps and a shorter working time with high productivity. There is.
  • Latex foam can be produced with higher productivity than ever.
  • the invention of claim 1 is a method for producing a latex foam, comprising a step of preparing a bottomed cylindrical stirring tank arranged so that a central axis is vertical, and a latex of rubber or resin in the stirring tank A step of immersing a disc turbine blade having a rotating shaft in a vertical direction in the latex accommodated in the agitation tank, and stirring the latex by rotating the disc turbine blade at a constant speed for a certain period of time.
  • a method for producing a latex foam comprising: a step; and a step of pulling up the disk turbine blade after the rotation is stopped from within the latex.
  • the disk turbine blade is attached to a disk that rotates horizontally around a rotation axis, and to the circumferential direction of the disk, radially about the rotation axis and orthogonal to the disk.
  • the rotational speed of the disk turbine blade is 100 m / min or more as expressed by the linear velocity at the radially outer tip of the blade body. A method for producing latex foam.
  • the invention according to claim 4 is the latex foam according to claim 2, wherein the rotational speed of the disk turbine blade is 250 m / min or more in terms of the linear velocity at the radially outer tip of the blade body. It is a manufacturing method.
  • the invention of claim 5 is characterized in that the rotational speed of the disk turbine blade is 500 m / min or less, expressed by the linear velocity at the radially outer tip of the blade body. It is a manufacturing method of latex foam given in one paragraph.
  • the invention of claim 6 is characterized in that the rotational speed of the disk turbine blade is 450 m / min or less in terms of the linear velocity at the radially outer tip of the blade body.
  • the invention according to claim 7 is the method for producing latex foam according to claim 1, wherein the time for rotating the disk turbine blade in the step of stirring the latex is from 30 minutes to 2 hours.
  • the inner diameter of the agitating tank is set to D and the central portion in the height direction of the disc turbine blade immersed so that the rotation axis extends in the vertical direction and the liquid of the latex. 2.
  • the immersion depth is adjusted so that the ratio h / D is in a range satisfying 0.5 or more and 1.5 or less, where h is the distance to the surface.
  • the ratio d / D where D is the inner diameter of the stirring tank and d is the maximum diameter of the disk turbine blade (the dimension from the blade tip to the opposite blade tip through the rotation center). 2.
  • the ratio h / D that defines the amount of immersion of the disk turbine blade in the latex is less than 0.5, the amount of immersion is not sufficient, and the disk turbine blade is considerably on the liquid surface of the latex. It will rotate at a close position. Therefore, there is a tendency that the degree of gas-liquid mixing by stirring tends to be too strong, the bubble content of the latex foam becomes excessively high, and the workability when processing into the shape of an article using the latex foam as a forming material is high There is a possibility that the strength of the article to be formed may be reduced.
  • the ratio h / D is within the range of 0.5 or more and 1.5 or less, the amount of immersion of the disk turbine blade in the latex and the degree of gas-liquid mixing by stirring are in an appropriate range. Can be maintained.
  • the bubble content of the latex foam is set within a suitable range to further improve the workability, and further improve the properties such as strength and liquid absorbency of articles formed using the latex foam. It becomes possible to do.
  • miniaturized to sufficient level to a sufficient level with high productivity by a fewer process and short working time using a simpler apparatus can be provided. It becomes possible.
  • FIG. 1 It is a perspective view which shows the external appearance of an example of the disc turbine blade used with the manufacturing method of the latex foam of this invention. It is sectional drawing which shows an example of the process of foaming latex using the disk turbine blade of the example of the said FIG. 1 among the manufacturing methods of the latex foam of this invention.
  • FIG. 1 is a perspective view showing an appearance of an example of a disk turbine blade used in the method for producing a latex foam of the present invention.
  • a disc turbine blade 1 of this example is attached to and can be removed from a stirring shaft 2 of a stirrer (not shown) in a state orthogonal to the direction of the central axis L1 of the stirring shaft 2.
  • a disc 3 and a plurality of (six in this example) wing bodies 4 provided at equal intervals in the circumferential direction of the disc 3 are provided.
  • the wing body 4 has a rectangular flat plate shape that is attached radially to the stirring shaft 2 and orthogonal to the disc 3.
  • a cylindrical boss 6 having a through hole 5 through which the inner diameter thereof substantially coincides with the outer diameter of the stirring shaft 2 and through which the stirring shaft 2 is inserted is integrally provided.
  • the disc 3, the boss 6 and the through hole 5 are provided concentrically with each other.
  • the disc 3 is provided integrally with the boss 6 in a direction orthogonal to the direction of the boss 6 and the central axis of the through-hole 5 (which coincides with the central axis L1 of the stirring shaft 2 in the figure).
  • a screw hole 7 is passed through the boss 6 from the outer peripheral surface to the inner peripheral surface facing the through hole 5.
  • a screw (not shown) is screwed into the screw hole 7 and tightened to tighten the disc 3 in the direction of the central axis L 1 of the stirring shaft 2. It can be fixed in an orthogonal state. Moreover, the disc 3 can be removed from the stirring shaft 2 by loosening the tightening of the screw.
  • the disk turbine blade 1 in the example shown in the figure includes six blade bodies 4, the number of blade bodies 4 can be arbitrarily set. As the number of the wing bodies 4 increases, the effect of refining the bubbles by the shearing force is improved. On the other hand, however, a large rotational torque is required to rotate the disk turbine blade 1 at a predetermined rotational speed. Therefore, the number of the wing bodies 4 is preferably about 4 or more and 6 or less.
  • each wing body 4 is a rectangular flat plate shape as shown in the figure in consideration of applying a shearing force to latex to make bubbles finer. Is preferred.
  • the dimensions of both the vertical and horizontal sides are 0.2 times or more the maximum diameter d of the disk turbine blade 1 (the dimension from the tip of the blade body 4 to the tip of the opposite blade body 4 through the central axis L1), It is preferably about 0.3 times or less.
  • FIG. 2 is a cross-sectional view showing a process of foaming latex in a batch-type open stirring tank using the disk turbine blade 1 of FIG. 1 in the latex foam production method of the present invention.
  • stirring tank 8 has a cylindrical shape having a constant inner diameter D, and is disposed with its central axis L2 facing in the vertical direction.
  • the upper end of the stirring tank 8 in the vertical direction is an opening 9 and the lower end is closed as a bottom 10. That is, the stirring tank 8 has a bottomed cylindrical shape.
  • the distance from the liquid surface 12 of the latex 11 before stirring to the disk 3 of the disk turbine blade 1 (distance to the center in the height direction of the disk turbine blade 1) h (center axis L1, L2 direction (vertical)
  • the immersion depth is set so that the distance h) in the direction) is in a range satisfying 0.5 or more and 1.5 or less, expressed as a ratio h / D with the inner diameter D of the stirring tank 8. If the ratio h / D is less than 0.5, the immersion depth of the disk turbine blade 1 in the latex 11 is not sufficient, and the disk turbine blade 1 rotates at a position that is considerably close to the liquid surface 12 of the latex 11. become.
  • the degree of gas-liquid mixing by stirring tends to be too strong, the bubble content of the latex foam becomes excessively high, and the workability when processing into the shape of an article using the latex foam as a forming material is high There is a possibility that the strength of the article to be formed may be reduced.
  • the ratio h / D exceeds 1.5, the immersion depth becomes too deep, and the disc turbine blade 1 rotates at a position considerably deeper than the liquid surface 12 of the latex 11.
  • the degree of gas-liquid mixing by stirring tends to be too weak, and the bubble content of the latex foam becomes excessively low, and an article excellent in desired properties such as liquid absorbability may not be obtained.
  • the ratio h / D is in the range of 0.5 or more and 1.5 or less, the immersion depth of the disk turbine blade 1 in the latex 11 and the degree of gas-liquid mixing by stirring are in an appropriate range. Can be maintained.
  • the bubble content of the latex foam is set within a suitable range, the workability is further improved, and the properties such as strength and liquid absorbency of articles formed using the latex foam are further improved. It is possible to make it.
  • ratio h / d is 0.7 or more also in the said range, and it is preferable that it is 1.0 or less.
  • the blade diameter d of the disk turbine blade 1 can be arbitrarily set according to the size of the stirring tank 8. However, considering the stirring efficiency, the blade diameter d and the stirring tank 8 are set so that the ratio d / D between the blade diameter d and the inner diameter D of the stirring tank 8 is in the range of 0.3 to 0.4. It is preferable to set the inner diameter D of the. Further, in the example of the figure, only one disk turbine blade 1 is attached to the tip of the stirring shaft 2, but depending on the depth of the stirring tank 8, the amount of latex 11 accommodated in the stirring tank 8, etc. Two or more disk turbine blades 1 may be attached to one stirring shaft 2 in the axial direction thereof.
  • the lower latex 11 from the liquid level 12 and the upper air are gas-liquid mixed by stirring, and air is included in the latex 11 as bubbles, and the bubbles are transferred from the blade body 4 of the disk turbine blade 1 to the latex 11.
  • the rotational speed of the agitation shaft 2 is preferably set to 100 m / min or more, particularly 250 m / min or more in terms of the linear velocity of the disk turbine blade 1 at the radially outer tip 13 of the blade body 4.
  • the linear velocity is 500 m / min or less, particularly 450 m / min or less, taking into account that the degree of gas-liquid mixing by stirring becomes too strong and the bubble content of the latex foam is prevented from becoming excessively high. It is preferable to set.
  • the stirring time, temperature, and the like can be arbitrarily set according to the type and viscosity of the latex to be stirred.
  • the stirring temperature (latex liquid temperature) is about room temperature (5 to 35 ° C.) in consideration of foaming while preventing the rubber in the latex from being completely vulcanized during stirring. Is preferred. Further, the time for stirring is preferably 30 minutes or longer, and preferably 2 hours or shorter in consideration of making the bubbles fine enough to a sufficient level.
  • the latex that is the basis of the latex foam to be produced
  • various latexes that can be used as a forming material for various articles, including various rubbers and resins
  • the rubber latex include one or more of natural rubber latex, deproteinized natural rubber latex, nitrile rubber (acrylonitrile-butadiene rubber) latex, styrene-butadiene rubber latex, chloroprene rubber latex, and the like.
  • vulcanizing agents sulfur, etc.
  • vulcanization accelerators vulcanization accelerators (titanium oxide, etc.)
  • anti-aging agents fillers, dispersants, stability You may mix
  • a foaming agent, a microcapsule, a foaming agent, or the like may be blended, and the latex may be foamed by stirring and foamed by a chemical foaming method using a foaming agent or the like.
  • the resin latex examples include one or more emulsions (latex) of a resin that can be emulsified (latexed), such as a vinyl chloride resin, a urethane resin, and an acrylic resin.
  • a resin that can be emulsified (latexed) such as a vinyl chloride resin, a urethane resin, and an acrylic resin.
  • additives such as an antioxidant, a filler, a dispersant, a stabilizer, and a surfactant may be further added to the latex of the resin.
  • a foaming agent, microcapsules, a foaming agent and the like may be blended and foamed by stirring, and foamed by a chemical foaming method using a foaming agent or the like. According to the present invention, it is possible to produce a latex foam in which bubbles are refined to a sufficient level only by stirring a rubber or resin latex using a disk turbine blade in a short working time with high productivity. Become.
  • Example 1 (Latex preparation)
  • 0.5 parts by mass of ammonia casein, 1 part by mass of potassium oleate, 1 part by mass of potassium hydroxide, 1 part by mass of sulfur, and dibutyl per 100 parts by mass of rubber (solid content) in the natural rubber latex 1 part by mass of zinc carbamate, 0.5 part by mass of zinc oxide, and 3 parts by mass of titanium oxide were blended to prepare a latex as a raw material for latex foam.
  • aqueous solution among the said each component described the quantity of the active ingredient in it.
  • the stirring tank 8 for storing the latex has a cylindrical shape with an inner diameter D of 140 cm, and its central axis L2 is arranged in the vertical direction, and the upper end in the vertical direction is an opening 9. And having a capacity of 500 L with the lower end closed as the bottom 10.
  • a disc 3 attached to the stirring shaft 2 so as to be orthogonal to the direction of the central axis L ⁇ b> 1 of the stirring shaft 2, the circumferential direction of the disc 3, etc.
  • the ratio d / D between the blade diameter d and the inner diameter D of the stirring tank 8 is 0.36.
  • the disc turbine blade 1 attached to the tip of the stirring shaft 2 was immersed in the latex 11 so that the distance h from the liquid surface 12 of the latex 11 before stirring to the disk 3 was 120 cm.
  • the ratio h / D between the distance h and the inner diameter D of 8 of the stirring vessel is 0.86.
  • Example 2 A latex foam was produced in the same manner as in Example 1 except that the rotation speed of the stirring shaft 2 was 60 rpm, and the linear velocity of the radial outer tip 13 of the blade body 4 of the disk turbine blade 1 was 94 m / min.
  • Example 3 A latex foam was prepared in the same manner as in Example 1 except that the disk turbine blade 1 was immersed in the latex 11 so that the distance h from the liquid surface 12 of the latex 11 before stirring to the disk 3 was 60 cm. Manufactured.
  • Example 4 A latex foam was prepared in the same manner as in Example 1 except that the disk turbine blade 1 was immersed in the latex 11 so that the distance h from the liquid surface 12 of the latex 11 before stirring to the disc 3 was 210 cm. Manufactured.
  • the ratio d / D is 0.36, the same as in Example 1, and the ratio h / D is 1.5.
  • ⁇ Comparative example 1> Instead of the disk turbine blade 1, three blades having a substantially elliptical shape and twisted are fixed to a cylindrical boss by being inclined with respect to the direction of the central axis L1, and the blade diameter d is 50 cm. The three-blade propeller blade was used.
  • the propeller blade was immersed in the latex 11 so that the distance h from the liquid level 12 of the latex 11 before stirring to the boss of the propeller blade to the attachment portion of each blade was 60 cm.
  • the ratio d / D is 0.36, which is the same as in Example 1, and the ratio h / D is 0.43, which is the same as in Example 3.
  • the stirrer was driven, the stirring shaft 2 was rotated at a rotation speed of 200 rpm, and stirred for 1 hour to foam the latex, thereby producing a latex foam.
  • the paddle blade was immersed in the latex 11 so that the distance h from the liquid surface 12 of the latex 11 before stirring to the center position of the boss of the paddle blade in the direction of the central axes L1 and L2 was 60 cm. .
  • the ratio d / D is 0.36, which is the same as in Example 1, and the ratio h / D is 0.43, which is the same as in Example 3.
  • a small amount of the manufactured latex foam was sampled on a petri dish, an image was taken using a digital microscope, and image analysis was performed. That is, 50 bubbles were arbitrarily selected from the photographed image, and the average value was calculated from the result of measuring the diameter of each bubble in the two-point distance measurement mode to obtain the average bubble diameter ( ⁇ m).
  • the produced latex foam was weighed with a cylinder to have a volume of 100 ml, and its mass was measured to determine the apparent specific gravity of the latex foam.
  • the bubble content (% by volume) was calculated from the apparent specific gravity and the true specific gravity of the latex that was the basis of the latex foam.
  • the average cell diameter of the latex foam produced by using a disc turbine blade as a stirring blade is larger than when other stirring blades are used. It was found that the latex foam can be refined to a sufficient level and the latex foam can be produced with high productivity in a short working time without requiring a step of dispersing the bubbles.
  • the linear velocity at the radially outer tip of the blade body of the disk turbine blade is 100 m. It has been found that it is preferable to rotate the stirring shaft so that it is at least 1 minute. Furthermore, from the results of Examples 1 and 2 and Examples 3 and 4, considering that the bubble content is suppressed, the amount of immersion of the disk turbine blade in the latex is h / D of 0.5 or more, 1.5 It was found that it is preferable to set so as to be as follows.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)

Abstract

La présente invention concerne un procédé de fabrication de mousse de latex qui peut fabriquer de la mousse de latex dans laquelle les bulles sont petites à un niveau suffisant à l'aide d'un dispositif simple avec une excellente productivité en peu d'étapes et en peu de temps. Un réservoir agitateur (8) est disposé de telle sorte que l'axe central (L2) soit vertical. Un latex de caoutchouc ou de résine est introduit dans le réservoir agitateur (8), et une ailette de turbine à disque (1) ayant un axe de rotation (L1) dans le sens vertical est immergée dans le latex. Soit D le diamètre intérieur du réservoir agitateur (8) et h la distance entre la partie centrale dans le sens de la hauteur de l'ailette de turbine à disque et la surface liquide du latex, la profondeur d'immersion est fixée à une profondeur satisfaisant le rapport h/D = 0,5 à 1,5. En outre, une ailette de turbine à disque (1) qui présente un disque (3) qui tourne horizontalement et une pluralité de corps d'ailettes en forme de plaques plates (4) fixés radialement dans le sens de la périphérie du disque (3) de façon à être orthogonaux par rapport au disque (3) est utilisée.
PCT/JP2012/076512 2012-01-11 2012-10-12 Procédé de fabrication de mousse de latex Ceased WO2013105320A1 (fr)

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JP2012002887A JP5351983B2 (ja) 2012-01-11 2012-01-11 ラテックスフォームの製造方法
JP2012-002887 2012-01-11

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WO2013105320A1 true WO2013105320A1 (fr) 2013-07-18

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105056802A (zh) * 2015-08-07 2015-11-18 无锡市悦丰化工有限公司 一种甲基丙烯酸甲酯生产用混合釜
EP3626422A1 (fr) * 2018-09-24 2020-03-25 LTA S.r.l. Procédé de fabrication d'un matériau en feuilles ou en rouleaux pour fabriquer des dispositifs médicaux et un matériau respectif
CN118788184A (zh) * 2024-08-08 2024-10-18 中国科学院过程工程研究所 一种翼型圆盘涡轮搅拌器

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6290727B2 (ja) * 2014-06-27 2018-03-07 東洋ゴム工業株式会社 密閉型二次電池の変形検出センサ、密閉型二次電池、及び、密閉型二次電池の変形検出方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5891801A (ja) * 1981-11-24 1983-05-31 東和グロ−ブ株式会社 表面に滑り止め突起を有する手袋
JPH10110017A (ja) * 1996-10-04 1998-04-28 Daikin Ind Ltd 含フッ素オレフィンモノマーの重合方法
JP2002182429A (ja) * 2000-12-14 2002-06-26 Canon Inc 重合トナーの製造方法
JP2005320652A (ja) * 2004-05-10 2005-11-17 Showa Co 手袋
JP2009533508A (ja) * 2006-04-11 2009-09-17 ソルヴェイ・ソレクシス・エッセ・ピ・ア 重合方法

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003000222A (ja) * 2001-06-25 2003-01-07 Hitachi Ltd 培養槽
JP2007084656A (ja) * 2005-09-21 2007-04-05 Dainippon Ink & Chem Inc 吸液性樹脂の製造方法

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5891801A (ja) * 1981-11-24 1983-05-31 東和グロ−ブ株式会社 表面に滑り止め突起を有する手袋
JPH10110017A (ja) * 1996-10-04 1998-04-28 Daikin Ind Ltd 含フッ素オレフィンモノマーの重合方法
JP2002182429A (ja) * 2000-12-14 2002-06-26 Canon Inc 重合トナーの製造方法
JP2005320652A (ja) * 2004-05-10 2005-11-17 Showa Co 手袋
JP2009533508A (ja) * 2006-04-11 2009-09-17 ソルヴェイ・ソレクシス・エッセ・ピ・ア 重合方法

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105056802A (zh) * 2015-08-07 2015-11-18 无锡市悦丰化工有限公司 一种甲基丙烯酸甲酯生产用混合釜
EP3626422A1 (fr) * 2018-09-24 2020-03-25 LTA S.r.l. Procédé de fabrication d'un matériau en feuilles ou en rouleaux pour fabriquer des dispositifs médicaux et un matériau respectif
CN118788184A (zh) * 2024-08-08 2024-10-18 中国科学院过程工程研究所 一种翼型圆盘涡轮搅拌器

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