WO2013145130A1 - Elevator rope and elevator apparatus - Google Patents
Elevator rope and elevator apparatus Download PDFInfo
- Publication number
- WO2013145130A1 WO2013145130A1 PCT/JP2012/057973 JP2012057973W WO2013145130A1 WO 2013145130 A1 WO2013145130 A1 WO 2013145130A1 JP 2012057973 W JP2012057973 W JP 2012057973W WO 2013145130 A1 WO2013145130 A1 WO 2013145130A1
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- WIPO (PCT)
- Prior art keywords
- thermoplastic polyurethane
- rope
- polyurethane elastomer
- elevator
- substituent
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B7/00—Other common features of elevators
- B66B7/06—Arrangements of ropes or cables
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- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B5/00—Making ropes or cables from special materials or of particular form
- D07B5/005—Making ropes or cables from special materials or of particular form characterised by their outer shape or surface properties
- D07B5/006—Making ropes or cables from special materials or of particular form characterised by their outer shape or surface properties by the properties of an outer surface polymeric coating
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B1/00—Constructional features of ropes or cables
- D07B1/22—Flat or flat-sided ropes; Sets of ropes consisting of a series of parallel ropes
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- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2201/00—Ropes or cables
- D07B2201/20—Rope or cable components
- D07B2201/2083—Jackets or coverings
- D07B2201/2087—Jackets or coverings being of the coated type
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2201/00—Ropes or cables
- D07B2201/20—Rope or cable components
- D07B2201/2083—Jackets or coverings
- D07B2201/2092—Jackets or coverings characterised by the materials used
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2205/00—Rope or cable materials
- D07B2205/20—Organic high polymers
- D07B2205/2003—Thermoplastics
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- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2205/00—Rope or cable materials
- D07B2205/20—Organic high polymers
- D07B2205/2064—Polyurethane resins
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2501/00—Application field
- D07B2501/20—Application field related to ropes or cables
- D07B2501/2007—Elevators
Definitions
- the present invention relates to an elevator rope and an elevator apparatus that are used in an elevator and suspend a car.
- a strand is formed by twisting a plurality of steel wires
- a wire rope is formed by twisting a plurality of strands
- the outermost periphery of the wire rope is covered with a resin material.
- a rope see, for example, Patent Document 1.
- An elevator using such a rope is driven by a frictional force between a sheave and a resin material constituting the outermost periphery of the rope. Therefore, it is desired to stabilize or improve the friction characteristics of the resin material.
- a rope covered with a polyurethane coating material not containing wax for example, see Patent Document 2.
- the present invention has been made to solve the above-described problems, and is based on an elevator rope having a stable coefficient of friction independent of temperature and sliding speed, and a normal sliding speed from a minute sliding speed. It is an object of the present invention to provide an elevator apparatus capable of stably braking a car at a wide range of sliding speeds up to the sliding speed of the vehicle.
- FIG. 1 is an example of the results showing the frequency dependence of the loss modulus in materials with different friction coefficient sliding speed dependences. As can be seen from FIG. 1, except for severe friction and wear conditions that exceed the limit PV value of the material (when the friction and heat due to frictional heat are significant), the inventors It was found that the frequency dependence of the loss elastic modulus is small in the viscoelastic master curve. Based on this knowledge, the present inventors have studied the composition of the resin material.
- the present invention is an elevator rope comprising a rope body and a resin coating layer covering the outer periphery of the rope body, wherein the resin coating layer is a thermoplastic polyurethane elastomer having an ionic substituent in the molecule.
- An elevator rope comprising a molded article of a resin composition containing an ion-crosslinked thermoplastic polyurethane elastomer obtained by ion-crosslinking an ionic substituent. Moreover, this invention is provided with said elevator rope, It is an elevator apparatus characterized by the above-mentioned.
- an elevator rope having a stable coefficient of friction can be obtained without depending on temperature and sliding speed.
- the elevator apparatus provided with this elevator rope can stably brake the car in a wide range of sliding speeds ranging from a minute sliding speed to a sliding speed during normal operation.
- Embodiments of the present invention will be described below.
- Embodiment 1 FIG.
- the elevator rope according to Embodiment 1 of the present invention includes an ion-crosslinked thermoplastic polyurethane elastomer in which the outer periphery of the rope body is ion-crosslinked with an ionic substituent of a thermoplastic polyurethane elastomer having an ionic substituent in the molecule. It is characterized by being covered with a molded body of the resin composition.
- the thermoplastic polyurethane elastomer used in the present embodiment is not particularly limited as long as it has an ionic substituent in the molecule.
- an ester-based thermoplastic polyurethane elastomer for example, an ester-based thermoplastic polyurethane elastomer, an ether-based thermoplastic polyurethane elastomer, an ester-ether-based heat Examples thereof include a plastic polyurethane elastomer and a carbonate-based thermoplastic polyurethane elastomer. These may be used alone or in combination of two or more.
- thermoplastic polyurethane elastomers ether-based thermoplastic polyurethane elastomers are preferably used in order to prevent hydrolysis that occurs in the use environment. From the viewpoint of handleability, it is preferable to use a thermoplastic polyurethane elastomer processed into pellets or flakes.
- thermoplastic polyurethane elastomer examples include anionic substituents such as carboxylic acid groups, sulfonic acid groups, and phosphoric acid groups, amino groups, and quaternary ammonium groups. And cationic substituents.
- anionic substituents such as carboxylic acid groups, sulfonic acid groups, and phosphoric acid groups, amino groups, and quaternary ammonium groups.
- cationic substituents One kind of these ionic substituents may be contained in the thermoplastic polyurethane elastomer, or two or more kinds of ionic substituents may be contained if there is no problem in the production of the polyurethane elastomer.
- thermoplastic polyurethane elastomer having an anionic substituent in the molecule and a polyvalent metal cation are ionically crosslinked, and a thermoplastic polyurethane having an anionic substituent and a cationic substituent in the molecule
- elastomers are ionically crosslinked
- thermoplastic polyurethane elastomers having cationic substituents in the molecule and polyvalent anions such as sulfate ions and phosphate ions are ionically crosslinked, heat having anionic substituents in the molecules
- ionic crosslinking a thermoplastic polyurethane elastomer having an anionic substituent in the molecule and a polyvalent metal cation are ionically crosslinked, and a thermoplastic polyurethane having an anionic substituent and a cationic substituent in the molecule
- numerator are mentioned.
- thermoplastic polyurethane elastomers having an anionic substituent in the molecule and polyvalent metal cations are mentioned.
- thermoplastic polyurethane elastomer having an anionic substituent and a cationic substituent in the molecule is ionically crosslinked is preferable.
- polyvalent metal cation used for crosslinking examples include cations of metals of Group 2, Group 4, Group 8, Group 11, Group 12, and Group 13. Specifically, polyvalent metal alkoxide, polyvalent metal sulfate, polyvalent metal hydroxide, polyvalent metal carbonate, polyvalent metal oxide and the like have an anionic substituent in the molecule. Ionic crosslinks can be formed by mixing with thermoplastic polyurethane elastomers. Examples of the polyvalent anion used for crosslinking include sulfate ion, phosphate ion, and polyvalent carboxylate compound.
- thermoplastic polyurethane elastomer can be generally produced by a known method. Specifically, in addition to the organic diisocyanate, polyol and chain extender, an ionic substituent-introducing compound may be used as a raw material, and these may be polymerized (for example, JP-A Nos. 2004-307833 and 2006-). No. 213776). This polymerization reaction is generally known, and the mixing ratio of the raw materials and the polymerization conditions may be appropriately adjusted according to the raw materials used. Moreover, you may use what is generally marketed as a thermoplastic polyurethane elastomer used in this Embodiment.
- Examples of the organic diisocyanate used as a raw material for the thermoplastic polyurethane elastomer include tolylene-2,4-diisocyanate, tolylene-2,6-diisocyanate, 4,4′-diphenylmethane diisocyanate, 3-methyldiphenylmethane-4,4′-diisocyanate, m -Phenylene diisocyanate, p-phenylene diisocyanate and the like. These may be used alone or in combination of two or more. Among these, diphenylmethane-4,4'-diisocyanate is preferable from the viewpoints of availability, mechanical strength as a rope coating material, and durability.
- thermoplastic polyurethane elastomer examples include polyester polyol, polycarbonate polyol, polyester ether polyol, polyether polyol, silicone polyol, and polyolefin polyol. These may be used alone or in combination of two or more.
- polyester polyol examples include a polyester polyol obtained by a condensation reaction of a dicarboxylic acid or its ester compound or acid anhydride and a diol; a polylactone diol obtained by ring-opening polymerization of a lactone monomer such as ⁇ -caprolactone.
- examples of the dicarboxylic acid include aliphatic dicarboxylic acids such as succinic acid, adipic acid, sebacic acid, and azelaic acid; aromatic dicarboxylic acids such as phthalic acid, terephthalic acid, isophthalic acid, and naphthalenedicarboxylic acid; hexahydroterephthalic acid, An alicyclic dicarboxylic acid such as hexahydrophthalic acid or hexahydroisophthalic acid is used.
- aliphatic dicarboxylic acids such as succinic acid, adipic acid, sebacic acid, and azelaic acid
- aromatic dicarboxylic acids such as phthalic acid, terephthalic acid, isophthalic acid, and naphthalenedicarboxylic acid
- hexahydroterephthalic acid An alicyclic dicarboxylic acid such as hexahydrophthalic acid or hexahydr
- diol examples include ethylene glycol, 1,3-propylene glycol, 1,2-propylene glycol, 1,3-butanediol, 1, 4-butanediol, 1,5-pentanediol, 1,6-hexanediol, 3-methyl-1,5-pentanediol, neopentyl glycol, 1,3-octanediol, 1,9-nonanediol, etc. are used. Is done. These may be used alone or in combination of two or more.
- polycarbonate polyol examples include ethylene glycol, 1,3-propylene glycol, 1,2-propylene glycol, 1,3-butanediol, 1,4-butanediol, 1,5-pentanediol, 1,6-hexanediol, Reaction of one or more polyhydric alcohols such as 3-methyl-1,5-pentanediol, neopentyl glycol, 1,8-octanediol, 1,9-nonanediol and diethylene glycol with diethylene carbonate, diethyl carbonate, etc.
- polycarbonate polyols obtained by the above process Specific examples include polyhexamethylene carbonate diol, polytrimethylene carbonate diol, poly 3-methyl (pentamethylene) carbonate diol, and copolymers thereof. These may be used alone or in combination of two or more.
- polyester ether polyol examples include a condensation reaction product of the above aliphatic dicarboxylic acid, aromatic dicarboxylic acid, alicyclic dicarboxylic acid, or an ester or acid anhydride thereof and glycol such as diethylene glycol or propylene oxide adduct. Can be mentioned. These may be used alone or in combination of two or more.
- polyether polyol examples include polyethylene glycol, polypropylene glycol and polytetramethylene glycol obtained by polymerizing cyclic ethers such as ethylene oxide, propylene oxide and tetrahydrofuran, and copolyethers thereof. These may be used alone or in combination of two or more.
- Silicone polyols include dimethylpolysiloxane diol having two active hydrogens at the terminal, methylphenylpolysiloxane diol, amino-modified silicone oil, diamine-modified silicone oil at both ends, polyether-modified silicone oil, alcohol-modified silicone oil, carboxyl group-modified Examples include silicone oil and phenyl-modified silicone oil. These may be used alone or in combination of two or more.
- the preferred number average molecular weight of these polyols is 450 to 4000.
- the thermoplastic polyurethane elastomer is preferably an ether-based thermoplastic polyurethane elastomer
- the polyol is particularly preferably polytetramethylene glycol.
- the chain extender used as a raw material for the thermoplastic polyurethane elastomer may be a diol having a number average molecular weight of 60 to 450, such as ethanediol, butanediol, pentanediol, hexanediol, diethylene glycol, dipropylene glycol, and cyclohexanediol. And polytetramethylene glycol. These may be used alone or in combination of two or more.
- ionic substituent-introducing compound used as a raw material for the thermoplastic polyurethane elastomer examples include ionic substituents such as carboxylic acid group, sulfonic acid group, phosphoric acid group, amino group, and quaternary ammonium group described above, and 2 Examples thereof include compounds having at least one hydroxyl group in the molecule.
- Such compounds include 2,2-dialkanolpropionic acid, 2,4-dialkanolbenzenesulfonic acid, N, N-bis (2- Hydroxyalkyl) -2-aminoalkanesulfonic acid, dialkanol sulfamic acid, alkali metal salts or ammonium salts of these acids, having 3 or more hydroxyl groups in the molecule as described in JP-A-2006-213776 Examples include taurine quaternary ammonium salts. Since these compounds have two or more hydroxyl groups in the molecule, they also function as chain extenders during polymerization.
- the resin composition containing the ion-crosslinked thermoplastic polyurethane elastomer preferably has a JIS A hardness of 98 or less and a glass transition temperature of ⁇ 20 ° C. or less.
- the reason why the JIS A hardness is defined as 98 or less is that the flexibility of the rope is impaired when the hardness exceeds 98, and that the power consumption when driven by applying this to an elevator tends to increase. This is because of the examination.
- the JIS A hardness of the resin composition is more preferably 85 or more and 95 or less.
- the reason why the glass transition temperature of the resin composition is specified to be ⁇ 20 ° C.
- the glass transition temperature of the resin composition is more preferably ⁇ 25 ° C. or lower.
- an inorganic filler can be further mixed in order to further stabilize the coefficient of friction with respect to temperature and sliding speed.
- examples of such inorganic fillers include spherical inorganic fillers such as calcium carbonate, silica, titanium oxide, carbon black, acetylene black, and barium sulfate, fibrous inorganic fillers such as carbon fiber and glass fiber, mica, and talc. And plate-like inorganic fillers such as bentonite. These may be used alone or in combination of two or more. Among these, it is preferable to use at least one of a fibrous inorganic filler and a plate-like inorganic filler in order to reduce the variation of the friction coefficient.
- the hardness of these inorganic fillers is not particularly limited.
- the blending amount of these inorganic fillers may be appropriately adjusted within a range where the JIS A hardness of the resin composition is 98 or less and the glass transition temperature is ⁇ 20 ° C. or less.
- the elevator rope according to the present embodiment is characterized by the outermost resin material covering the outer periphery of the rope body, so the structure of the rope body is not particularly limited. Includes a strand or a cord formed by twisting a plurality of steel strands as a load supporting member.
- the rope body in the present embodiment may be in the form of a belt including the above-described strands or cords.
- a metal such as Chemlock (registered trademark) 218 (manufactured by Road Far East) and an adhesive for polyurethane are preliminarily applied to the above strands or cords. It is preferable to keep it.
- the elevator rope according to the present embodiment is heated to about 100 to 120 ° C. for curing the adhesive after the outermost resin layer is coated.
- an elevator rope having a small coefficient variation can be obtained.
- An elevator apparatus including the elevator rope can stably brake a car in a wide range of sliding speeds from a very small sliding speed to a sliding speed during normal operation.
- thermoplastic polyurethane elastomer used in this embodiment is the same process as a general-purpose non-crosslinking thermoplastic polyurethane elastomer (coating molding by heating and melting the resin). And then cooling) to perform molding and ionic crosslinking. Therefore, in this embodiment, there is an advantage that an additional process such as heat curing for crosslinking and light irradiation is unnecessary.
- Example 1 Chain extender mixture of 4,4′-diphenylmethane diisocyanate, polytetramethylene glycol having a number average molecular weight of 2000 and 1,4-butanediol and N, N-bis (2-hydroxyethyl) -2-aminoethanesulfonic acid ( 1,4-butanediol and N, N-bis (2-hydroxyethyl) -2-aminoethanesulfonic acid in a molar ratio of 2: 1) were polymerized to obtain an ether-based thermoplastic polyurethane elastomer.
- the amount of each component used was polytetramethylene glycol, 1,4-butanediol, and N, N-bis (2-hydroxyethyl) -2- with respect to an isocyanate equivalent of 1 of 4,4′-diphenylmethane diisocyanate.
- the sum of hydroxyl equivalents of aminoethanesulfonic acid was set to 1.
- tetrabutyl titanate as a polyvalent metal-containing compound was added to and mixed with the ether-based thermoplastic polyurethane elastomer thus obtained, so that an ion-crosslinked thermoplastic polyurethane elastomer (JIS A hardness 85, glass transition temperature ⁇ 41 ° C.).
- Tetrabutyl titanate was used in an amount of 0.2 mol with respect to 1 mol of N, N-bis (2-hydroxyethyl) -2-aminoethanesulfonic acid charged when the ether-based thermoplastic polyurethane elastomer was obtained.
- the obtained ion-crosslinked thermoplastic polyurethane elastomer was supplied to an extruder, extrusion was performed so as to cover the outer periphery of the rope body, and a resin coating layer was formed on the outer periphery of the rope body. After covering the rope main body with the resin coating layer, in order to stabilize the physical properties of the resin coating layer, it was heated at 110 ° C.
- the obtained rope for elevators has a cross-sectional structure described in FIG. 1 of International Publication No. 2003/050348.
- the rope body includes an inner layer rope having a plurality of core ropes in which a plurality of steel strands are twisted together and a plurality of inner layer strands in which a plurality of steel strands are twisted, and an inner layer rope Corresponding to an inner layer covering made of resin covering the outer periphery, an outer layer rope provided on the outer periphery of the inner layer covering, and having an outer layer rope with a plurality of steel strands twisted together, The resin coating layer corresponds to the outer layer covering. Before the rope body was coated with each resin composition, Chemlock (registered trademark) 218 (manufactured by Road Far East) was applied to the outer layer cord and dried.
- Chemlock registered trademark
- Example 2 An ion-crosslinked thermoplastic polyurethane elastomer (JIS A hardness 95, glass transition temperature -32 ° C.) was obtained in the same manner as in Example 1 except that the ratio of the polytetramethylene glycol and the chain extender mixture was changed. An elevator rope was obtained in the same manner as in Example 1 by using the obtained ion-crosslinked thermoplastic polyurethane elastomer.
- the amount of each component used is 1 for the equivalent of 1 for 4,4′-diphenylmethane diisocyanate and 1 for the hydroxyl equivalent of polytetramethylene glycol, 1,4-butanediol, and taurine quaternary ammonium salt. I did it.
- An elevator rope was obtained in the same manner as in Example 1 by using the obtained ion-crosslinked thermoplastic polyurethane elastomer.
- Example 4 An ion-crosslinked thermoplastic polyurethane elastomer (JIS A hardness 95, glass transition temperature ⁇ 33 ° C.) was obtained in the same manner as in Example 3 except that the ratio of polytetramethylene glycol and the chain extender mixture was changed. An elevator rope was obtained in the same manner as in Example 1 by using the obtained ion-crosslinked thermoplastic polyurethane elastomer.
- Example 5 The resin composition (JIS A hardness 97, glass transition temperature -31 ° C.) obtained by adding 9.1% by weight of titanium oxide to the ion-crosslinked thermoplastic polyurethane elastomer obtained in Example 2 was used in the same manner as in Example 1. An elevator rope was obtained.
- JIS A hardness 97, glass transition temperature -31 ° C. The resin composition obtained by adding 9.1% by weight of titanium oxide to the ion-crosslinked thermoplastic polyurethane elastomer obtained in Example 2 was used in the same manner as in Example 1. An elevator rope was obtained.
- Example 6 Example using a resin composition (JIS A hardness 97, glass transition temperature -30 ° C.) obtained by adding 4.8% by weight of glass fiber (fiber length: about 1 mm) to the ion-crosslinked thermoplastic polyurethane elastomer obtained in Example 2 In the same manner as in No. 1, an elevator rope was obtained.
- a resin composition JIS A hardness 97, glass transition temperature -30 ° C.
- Example 7 Using the resin composition obtained by adding 9.1% by weight of talc to the ion-crosslinked thermoplastic polyurethane elastomer obtained in Example 2 (JIS A hardness 96, glass transition temperature -32 ° C.), an elevator was carried out in the same manner as in Example 1. I got a rope for it.
- the amount of each component used was set so that the sum of the hydroxyl equivalents of polytetramethylene glycol and 1,4-butanediol was 1 with respect to the isocyanate equivalent of 1 of 4,4′-diphenylmethane diisocyanate.
- An elevator rope was obtained in the same manner as in Example 1 using the obtained ether-based thermoplastic polyurethane elastomer.
- JIS A hardness 95, glass transition temperature -30 ° C. An elevator rope was obtained in the same manner as in Example 1 using the obtained ether-based thermoplastic polyurethane elastomer.
- JIS A hardness 85 Glass transition temperature -41 ° C.
- the amount of each component used was polytetramethylene glycol, 1,4-butanediol, and N, N-bis (2-hydroxyethyl) -2- with respect to an isocyanate equivalent of 1 of 4,4′-diphenylmethane diisocyanate.
- the sum of hydroxyl equivalents of aminoethanesulfonic acid was set to 1.
- An elevator rope was obtained in the same manner as in Example 1 using the obtained ether-based thermoplastic polyurethane elastomer.
- JIS A hardness of resin composition According to JIS K7215, the durometer A hardness was measured using a type A durometer.
- the glass transition temperature of the resin composition was measured as follows. A resin composition having the same composition as the resin coating layer used in each of the examples and comparative examples was supplied to an injection molding machine, molded into a flat plate of 100 mm ⁇ 100 mm ⁇ thickness 2 mm, heated at 110 ° C. for 2 hours, A test piece of 50 mm ⁇ 10 mm ⁇ thickness 2 mm was cut out from the center.
- the loss elastic modulus of the test piece was measured under the conditions of deformation mode bending mode, measurement frequency 10 Hz, heating rate 2 ° C./min, and excitation amplitude 10 ⁇ m.
- the peak temperature of the elastic modulus was taken as the glass transition temperature.
- FIG. 2 is a conceptual diagram of an apparatus for measuring a friction coefficient in a minute sliding speed region.
- the elevator rope 1 obtained in the example and the comparative example is wound around the sheave 2 by 180 degrees, one end is fixed to the measuring device 3, the other end is connected to the weight 4, and the elevator rope is used.
- Rope 1 was tensioned.
- the sheave 2 is rotated clockwise at a predetermined speed, the rope tension (T 2 ) on the fixed side is loosened by the friction force generated between the elevator rope 1 and the sheave 2 and the rope tension on the weight side ( A difference in tension occurs with respect to T 1 ).
- the rope tension (T 1 ) on the weight side and the rope tension (T 2 ) on the fixed side were measured with a load cell provided at the connection portion between the rope and the weight.
- the sliding speed during stationary holding is defined as 1 ⁇ 10 ⁇ 5 mm / s
- the sliding speed during normal operation is defined as 1 mm / s
- T 1 and T 2 (where T 1 > T 2 )
- FIG. 3 is a conceptual diagram of an apparatus for measuring a friction coefficient in a large sliding speed range for emergency stopping.
- the elevator rope 1 obtained in the example and the comparative example was wound around the drive sheave 5 by 180 degrees, one end thereof was connected to the weight 4a, and the other end was connected to the weight 4b having a mass larger than that of the weight 4a.
- the weight 4a is raised by rotating the driving sheave 5 clockwise, and when the rope speed reaches 4 m / s, the driving sheave 5 is suddenly stopped, and the elevator rope 1 is slipped with respect to the driving sheave 5. It was.
- K 2 is the same as the value used in the measurement method in the minute slip velocity region
- the friction coefficient measured by each measurement method is x when the friction coefficient is less than 0.15, ⁇ when the friction coefficient is 0.15 or more and less than 0.2, ⁇ when the friction coefficient is 0.2 or more and less than 0.25, 0 or more and 0 .6 or less was rated as ⁇ .
- ⁇ when the friction coefficient is 0.15 or more and less than 0.15
- ⁇ when the friction coefficient is 0.2 or more and less than 0.25
- the friction coefficients of the elevator ropes obtained in the examples and comparative examples are as follows: in a minute slip speed range (1 ⁇ 10 ⁇ 5 mm / s) and in a slip speed range at the time of emergency stop. It showed a tendency to be lower than the speed range during normal operation. However, the elevator ropes obtained in the examples both had a friction coefficient of 0.15 or more in the minute slip speed range and the speed range during emergency stop. From the comparison between Examples 1 to 7 and Comparative Examples 1 to 3, it can be seen that the variation of the friction coefficient can be reduced by ionic crosslinking of the thermoplastic polyurethane elastomer.
- Example 2 From the comparison between Example 2 and Examples 6 and 7, when glass fiber that is a fibrous inorganic filler or talc that is a plate-like inorganic filler is added to the ion-crosslinked thermoplastic polyurethane elastomer, the variation in the coefficient of friction is further reduced. I understand that I can do it. On the other hand, the elevator rope obtained in the comparative example had a large variation in the coefficient of friction, and both the coefficient of friction in the minute slip speed range and the speed range during emergency stop were both less than 0.15.
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- Lift-Guide Devices, And Elevator Ropes And Cables (AREA)
Abstract
This elevator rope is provided with both a rope body and a resin cover layer which covers the outer periphery of the rope body and is characterized in that the resin cover layer comprises an ionically crosslinked thermoplastic polyurethane elastomer obtained from a thermoplastic polyurethane elastomer which has an ionic substituent in the molecule by ionically crosslinking the ionic substituent. It is preferable that the ionically crosslinked thermoplastic polyurethane elastomer is either a product obtained by ionically crosslinking a thermoplastic polyurethane elastomer which has an anionic substituent in the molecule with polyvalent metal cations or a product obtained by ionically crosslinking thermoplastic polyurethane elastomers which each have both a cationic substituent and an anionic substituent in the molecule with each other. The elevator rope exhibits a stable friction coefficient which is independent of temperature or sliding speed.
Description
本発明は、エレベータに用いられ、かごを吊り下げるエレベータ用ロープ及びエレベータ装置に関するものである。
The present invention relates to an elevator rope and an elevator apparatus that are used in an elevator and suspend a car.
従来、エレベータ装置においては、ロープの早期の摩耗や断線を防止するため、ロープ径の40倍以上の直径を持つ綱車が使用されている。そのため、綱車の径を小さくするためには、ロープの径も小さくする必要がある。しかし、ロープ本数を変えずロープ径を小さくすると、ロープの耐荷重が低下し、かごに積載できる荷物や乗降する乗客の重量が低下する。また、ロープ本数の増加は、エレベータ装置の構成を複雑してしまう。さらに、駆動シーブの径を小さくすると、ロープの繰返し曲げ疲労が大きくなり、ロープを頻繁に交換する必要がある。
これらの問題を解決する手段として、鋼製素線を複数本撚り合せてストランドを構成し、このストランドを複数本撚り合せてワイヤーロープを構成し、このワイヤーロープの最外周を樹脂材料で被覆したロープを用いることが提案されている(例えば、特許文献1を参照)。このようなロープを用いたエレベータは、シーブとロープの最外周を構成する樹脂材料との摩擦力により駆動される。そのため、樹脂材料の摩擦特性を安定させたり、向上させたりすることが望まれる。そこで、エレベータ用ロープの摩擦特性を向上させるために、ワックスを含有しないポリウレタン被覆材で被覆したロープを用いることが提案されている(例えば、特許文献2を参照)。 Conventionally, in an elevator apparatus, in order to prevent early wear and disconnection of a rope, a sheave having a diameter of 40 times or more the rope diameter is used. Therefore, in order to reduce the diameter of the sheave, it is necessary to reduce the diameter of the rope. However, if the rope diameter is reduced without changing the number of ropes, the load resistance of the ropes is reduced, and the weight of luggage that can be loaded onto the car and passengers getting on and off the car are reduced. Moreover, the increase in the number of ropes complicates the configuration of the elevator apparatus. Further, when the diameter of the drive sheave is reduced, repeated bending fatigue of the rope increases, and the rope needs to be frequently replaced.
As means for solving these problems, a strand is formed by twisting a plurality of steel wires, a wire rope is formed by twisting a plurality of strands, and the outermost periphery of the wire rope is covered with a resin material. It has been proposed to use a rope (see, for example, Patent Document 1). An elevator using such a rope is driven by a frictional force between a sheave and a resin material constituting the outermost periphery of the rope. Therefore, it is desired to stabilize or improve the friction characteristics of the resin material. Then, in order to improve the friction characteristic of the rope for elevators, it has been proposed to use a rope covered with a polyurethane coating material not containing wax (for example, see Patent Document 2).
これらの問題を解決する手段として、鋼製素線を複数本撚り合せてストランドを構成し、このストランドを複数本撚り合せてワイヤーロープを構成し、このワイヤーロープの最外周を樹脂材料で被覆したロープを用いることが提案されている(例えば、特許文献1を参照)。このようなロープを用いたエレベータは、シーブとロープの最外周を構成する樹脂材料との摩擦力により駆動される。そのため、樹脂材料の摩擦特性を安定させたり、向上させたりすることが望まれる。そこで、エレベータ用ロープの摩擦特性を向上させるために、ワックスを含有しないポリウレタン被覆材で被覆したロープを用いることが提案されている(例えば、特許文献2を参照)。 Conventionally, in an elevator apparatus, in order to prevent early wear and disconnection of a rope, a sheave having a diameter of 40 times or more the rope diameter is used. Therefore, in order to reduce the diameter of the sheave, it is necessary to reduce the diameter of the rope. However, if the rope diameter is reduced without changing the number of ropes, the load resistance of the ropes is reduced, and the weight of luggage that can be loaded onto the car and passengers getting on and off the car are reduced. Moreover, the increase in the number of ropes complicates the configuration of the elevator apparatus. Further, when the diameter of the drive sheave is reduced, repeated bending fatigue of the rope increases, and the rope needs to be frequently replaced.
As means for solving these problems, a strand is formed by twisting a plurality of steel wires, a wire rope is formed by twisting a plurality of strands, and the outermost periphery of the wire rope is covered with a resin material. It has been proposed to use a rope (see, for example, Patent Document 1). An elevator using such a rope is driven by a frictional force between a sheave and a resin material constituting the outermost periphery of the rope. Therefore, it is desired to stabilize or improve the friction characteristics of the resin material. Then, in order to improve the friction characteristic of the rope for elevators, it has been proposed to use a rope covered with a polyurethane coating material not containing wax (for example, see Patent Document 2).
一方、シーブとベルトとの間の摩擦係数を所定の範囲内に減少させるために、含油量の低いイソパラフィンワックスを含有するポリエーテル系ポリウレタンエラストマーで被覆したフラットベルトが提案されている(例えば、特許文献3を参照)。
On the other hand, in order to reduce the coefficient of friction between the sheave and the belt within a predetermined range, a flat belt coated with a polyether polyurethane elastomer containing an isoparaffin wax having a low oil content has been proposed (for example, a patent). Reference 3).
更に、シーブとロープ又はベルトとの接触面に油が付着したような状況においても摩擦係数が大幅に下がらず且つ摺動による樹脂被覆体の摩耗が少ないロープ又はベルトを得るため、ロープ又はベルトの樹脂母材に不溶固体添加物粒子、特にシーブの表面部材の硬度よりも大きい硬度を有する不溶固体添加物粒子を混合した樹脂被覆体で被覆したロープ及びベルトが提案されている(例えば、特許文献4を参照)。
Further, even when oil adheres to the contact surface between the sheave and the rope or belt, in order to obtain a rope or belt in which the friction coefficient is not significantly reduced and the resin coating is less worn by sliding, There have been proposed ropes and belts coated with a resin coating in which insoluble solid additive particles, particularly insoluble solid additive particles having a hardness greater than the hardness of the surface member of the sheave, are mixed with a resin base material (for example, Patent Documents). 4).
一般に、樹脂材料の摩擦係数は滑り速度や温度に大きく依存することが知られている。更に、樹脂材料の動的粘弾性等の粘弾性特性は、その速度及び温度依存性の間に換算性(Williams-Landel-Ferryの式(WLF式))があることも知られている。更に、ゴムの摩擦の場合にもその滑り速度及び温度に対して同様の換算性が成り立つことから、ゴムの粘弾性特性がそのゴムの摩擦特性に関与していることが示されている(例えば、非特許文献1を参照)。
In general, it is known that the coefficient of friction of a resin material greatly depends on the sliding speed and temperature. Furthermore, it is also known that the viscoelastic properties such as dynamic viscoelasticity of a resin material have a conversion property (Williams-Landel-Ferry equation (WLF equation)) between the speed and temperature dependency. Furthermore, in the case of rubber friction, the same conversion property holds for the sliding speed and temperature, which indicates that the viscoelastic properties of rubber are involved in the friction properties of the rubber (for example, , See Non-Patent Document 1).
上記のことから分かるように、特許文献2に記載されるワックスを含有しないポリウレタン被覆材であっても、材料そのものの摩擦係数が滑り速度や温度により変化するため、エレベータを安定して制動できないという問題があった。更に、非特許文献1に記載されている通り、ゴムの摩擦係数は滑り速度に対して極大値を有する。エレベータが長時間停止するためには、ロープとシーブとの摩擦力によりかごの静止状態を維持する必要があるが、従来のような摩擦係数の変動が大きな被覆材や、特許文献3に記載のような含油量の低いイソパラフィンワックスを添加した被覆材では微小な滑り速度での摩擦係数が一定以上確保できず、かごの停止位置が経時的にずれるという問題があった。また、運転中のエレベータを非常停止あるいは急停止させるためには、ロープとシーブとの摩擦力によりエレベータを制動する必要があるが、特許文献1~4に記載されているような従来の被覆材では摩擦熱により強度低下や溶融が起こり、その結果、ロープとシーブとの間の摩擦係数が著しく低下するという問題もあった。
As can be seen from the above, even with a polyurethane coating material that does not contain wax described in Patent Document 2, the friction coefficient of the material itself changes depending on the sliding speed and temperature, so that the elevator cannot be braked stably. There was a problem. Furthermore, as described in Non-Patent Document 1, the friction coefficient of rubber has a maximum value with respect to the sliding speed. In order for the elevator to stop for a long time, it is necessary to maintain the stationary state of the car due to the frictional force between the rope and the sheave. Such a coating material to which isoparaffin wax having a low oil content is added has a problem that the friction coefficient at a minute sliding speed cannot be secured above a certain level, and the stop position of the car shifts with time. In addition, in order to make an emergency stop or a sudden stop of an elevator in operation, it is necessary to brake the elevator by a frictional force between a rope and a sheave. Conventional covering materials as described in Patent Documents 1 to 4 However, there is a problem that the friction coefficient between the rope and the sheave is remarkably reduced as a result of strength reduction and melting caused by frictional heat.
従って、本発明は、上記のような問題点を解決するためになされたものであり、温度や滑り速度に依存せず安定した摩擦係数を有するエレベータ用ロープ、及び微小な滑り速度から通常運転時の滑り速度に至る広範囲な滑り速度において乗りかごを安定して制動させることのできるエレベータ装置を得ることを目的とする。
Therefore, the present invention has been made to solve the above-described problems, and is based on an elevator rope having a stable coefficient of friction independent of temperature and sliding speed, and a normal sliding speed from a minute sliding speed. It is an object of the present invention to provide an elevator apparatus capable of stably braking a car at a wide range of sliding speeds up to the sliding speed of the vehicle.
発明者らは、様々な樹脂材料の摩擦特性について検討した。図1は、摩擦係数の滑り速度依存性が異なる材料における損失弾性率の周波数依存性を示す結果の一例である。図1から分かるように、発明者らは、材料の限界PV値を超えるような厳しい摩擦摩耗条件(摩擦や摩擦熱による溶融が著しい場合)を除き、摩擦係数の滑り速度依存性が小さい材料は、粘弾性のマスターカーブにおいて、損失弾性率の周波数依存性が小さいということを見出した。この知見に基づいて、本発明者らは、樹脂材料の組成について検討した結果、損失弾性率の周波数依存性を小さくし、摩擦係数の滑り速度依存性も小さくするためには、分子中にイオン性置換基を有する熱可塑性ポリウレタンエラストマーのイオン性置換基をイオン架橋させたイオン架橋熱可塑性ポリウレタンエラストマーを含む樹脂組成物の成形体を、ロープ本体の外周を覆う層として用いることが有用であることを見出し、本発明を完成させるに至った。
即ち、本発明は、ロープ本体と、前記ロープ本体の外周を覆う樹脂被覆層とを備えるエレベータ用ロープであって、前記樹脂被覆層が、分子中にイオン性置換基を有する熱可塑性ポリウレタンエラストマーのイオン性置換基をイオン架橋させたイオン架橋熱可塑性ポリウレタンエラストマーを含む樹脂組成物の成形体からなることを特徴とするエレベータ用ロープである。
また、本発明は、上記のエレベータ用ロープを備えることを特徴とするエレベータ装置である。 The inventors examined the friction characteristics of various resin materials. FIG. 1 is an example of the results showing the frequency dependence of the loss modulus in materials with different friction coefficient sliding speed dependences. As can be seen from FIG. 1, except for severe friction and wear conditions that exceed the limit PV value of the material (when the friction and heat due to frictional heat are significant), the inventors It was found that the frequency dependence of the loss elastic modulus is small in the viscoelastic master curve. Based on this knowledge, the present inventors have studied the composition of the resin material. As a result, in order to reduce the frequency dependence of the loss modulus and the sliding speed dependence of the friction coefficient, It is useful to use a molded article of a resin composition containing an ionically crosslinked thermoplastic polyurethane elastomer obtained by ionically crosslinking an ionic substituent of a thermoplastic polyurethane elastomer having a functional substituent as a layer covering the outer periphery of the rope body. As a result, the present invention has been completed.
That is, the present invention is an elevator rope comprising a rope body and a resin coating layer covering the outer periphery of the rope body, wherein the resin coating layer is a thermoplastic polyurethane elastomer having an ionic substituent in the molecule. An elevator rope comprising a molded article of a resin composition containing an ion-crosslinked thermoplastic polyurethane elastomer obtained by ion-crosslinking an ionic substituent.
Moreover, this invention is provided with said elevator rope, It is an elevator apparatus characterized by the above-mentioned.
即ち、本発明は、ロープ本体と、前記ロープ本体の外周を覆う樹脂被覆層とを備えるエレベータ用ロープであって、前記樹脂被覆層が、分子中にイオン性置換基を有する熱可塑性ポリウレタンエラストマーのイオン性置換基をイオン架橋させたイオン架橋熱可塑性ポリウレタンエラストマーを含む樹脂組成物の成形体からなることを特徴とするエレベータ用ロープである。
また、本発明は、上記のエレベータ用ロープを備えることを特徴とするエレベータ装置である。 The inventors examined the friction characteristics of various resin materials. FIG. 1 is an example of the results showing the frequency dependence of the loss modulus in materials with different friction coefficient sliding speed dependences. As can be seen from FIG. 1, except for severe friction and wear conditions that exceed the limit PV value of the material (when the friction and heat due to frictional heat are significant), the inventors It was found that the frequency dependence of the loss elastic modulus is small in the viscoelastic master curve. Based on this knowledge, the present inventors have studied the composition of the resin material. As a result, in order to reduce the frequency dependence of the loss modulus and the sliding speed dependence of the friction coefficient, It is useful to use a molded article of a resin composition containing an ionically crosslinked thermoplastic polyurethane elastomer obtained by ionically crosslinking an ionic substituent of a thermoplastic polyurethane elastomer having a functional substituent as a layer covering the outer periphery of the rope body. As a result, the present invention has been completed.
That is, the present invention is an elevator rope comprising a rope body and a resin coating layer covering the outer periphery of the rope body, wherein the resin coating layer is a thermoplastic polyurethane elastomer having an ionic substituent in the molecule. An elevator rope comprising a molded article of a resin composition containing an ion-crosslinked thermoplastic polyurethane elastomer obtained by ion-crosslinking an ionic substituent.
Moreover, this invention is provided with said elevator rope, It is an elevator apparatus characterized by the above-mentioned.
本発明によれば、温度や滑り速度に依存せず安定した摩擦係数を有するエレベータ用ロープを得ることができる。また、このエレベータ用ロープを備えるエレベータ装置は、微小な滑り速度から通常運転時の滑り速度に至る広範囲な滑り速度において乗りかごを安定して制動させることができる。
According to the present invention, an elevator rope having a stable coefficient of friction can be obtained without depending on temperature and sliding speed. Moreover, the elevator apparatus provided with this elevator rope can stably brake the car in a wide range of sliding speeds ranging from a minute sliding speed to a sliding speed during normal operation.
以下、本発明の実施の形態について説明する。
実施の形態1.
本発明の実施の形態1によるエレベータ用ロープは、ロープ本体の外周が、分子中にイオン性置換基を有する熱可塑性ポリウレタンエラストマーのイオン性置換基をイオン架橋させたイオン架橋熱可塑性ポリウレタンエラストマーを含む樹脂組成物の成形体により覆われていることに特徴がある。
本実施の形態において使用する熱可塑性ポリウレタンエラストマーとしては、分子中にイオン性置換基を有するものであればよく、例えば、エステル系熱可塑性ポリウレタンエラストマー、エーテル系熱可塑性ポリウレタンエラストマー、エステル-エーテル系熱可塑性ポリウレタンエラストマー、カーボネート系熱可塑性ポリウレタンエラストマー等が挙げられる。これらは、単独で用いてもよいし、二種類以上を組み合わせて用いてもよい。 Embodiments of the present invention will be described below.
Embodiment 1 FIG.
The elevator rope according toEmbodiment 1 of the present invention includes an ion-crosslinked thermoplastic polyurethane elastomer in which the outer periphery of the rope body is ion-crosslinked with an ionic substituent of a thermoplastic polyurethane elastomer having an ionic substituent in the molecule. It is characterized by being covered with a molded body of the resin composition.
The thermoplastic polyurethane elastomer used in the present embodiment is not particularly limited as long as it has an ionic substituent in the molecule. For example, an ester-based thermoplastic polyurethane elastomer, an ether-based thermoplastic polyurethane elastomer, an ester-ether-based heat Examples thereof include a plastic polyurethane elastomer and a carbonate-based thermoplastic polyurethane elastomer. These may be used alone or in combination of two or more.
実施の形態1.
本発明の実施の形態1によるエレベータ用ロープは、ロープ本体の外周が、分子中にイオン性置換基を有する熱可塑性ポリウレタンエラストマーのイオン性置換基をイオン架橋させたイオン架橋熱可塑性ポリウレタンエラストマーを含む樹脂組成物の成形体により覆われていることに特徴がある。
本実施の形態において使用する熱可塑性ポリウレタンエラストマーとしては、分子中にイオン性置換基を有するものであればよく、例えば、エステル系熱可塑性ポリウレタンエラストマー、エーテル系熱可塑性ポリウレタンエラストマー、エステル-エーテル系熱可塑性ポリウレタンエラストマー、カーボネート系熱可塑性ポリウレタンエラストマー等が挙げられる。これらは、単独で用いてもよいし、二種類以上を組み合わせて用いてもよい。 Embodiments of the present invention will be described below.
The elevator rope according to
The thermoplastic polyurethane elastomer used in the present embodiment is not particularly limited as long as it has an ionic substituent in the molecule. For example, an ester-based thermoplastic polyurethane elastomer, an ether-based thermoplastic polyurethane elastomer, an ester-ether-based heat Examples thereof include a plastic polyurethane elastomer and a carbonate-based thermoplastic polyurethane elastomer. These may be used alone or in combination of two or more.
これらの熱可塑性ポリウレタンエラストマーの中でも、使用環境で起こる加水分解を防ぐために、エーテル系熱可塑性ポリウレタンエラストマーを用いることが好ましい。また、取り扱い性の点から、ペレット状もしくはフレーク状に加工された熱可塑性ポリウレタンエラストマーを用いることが好ましい。
Among these thermoplastic polyurethane elastomers, ether-based thermoplastic polyurethane elastomers are preferably used in order to prevent hydrolysis that occurs in the use environment. From the viewpoint of handleability, it is preferable to use a thermoplastic polyurethane elastomer processed into pellets or flakes.
本実施の形態において使用する熱可塑性ポリウレタンエラストマーに含まれるイオン性置換基としては、カルボン酸基、スルホン酸基、リン酸基等のアニオン性置換基、及びアミノ基、第4級アンモニウム基等のカチオン性置換基が挙げられる。これらのイオン性置換基は、熱可塑性ポリウレタンエラストマー中に1種類のみ含まれてもよいし、ポリウレタンエラストマーの製造上問題がなければ2種以上のイオン性置換基が含まれてもよい。イオン架橋の形態としては、分子中にアニオン性置換基を有する熱可塑性ポリウレタンエラストマーと多価金属カチオンとをイオン架橋させる形態、分子中にアニオン性置換基とカチオン性置換基とを有する熱可塑性ポリウレタンエラストマー同士をイオン架橋させる形態、分子中にカチオン性置換基を有する熱可塑性ポリウレタンエラストマーと硫酸イオン、リン酸イオン等の多価アニオンとをイオン架橋させる形態、分子中にアニオン性置換基を有する熱可塑性ポリウレタンエラストマーと分子中にカチオン性置換基を有する熱可塑性ポリウレタンエラストマーとをイオン架橋させる形態等が挙げられる。これらの中でも、材料の入手しやすさ、成形加工のしやすさ及びイオン架橋のしやすさの観点から、分子中にアニオン性置換基を有する熱可塑性ポリウレタンエラストマーと多価金属カチオンとをイオン架橋させる形態及び分子中にアニオン性置換基とカチオン性置換基とを有する熱可塑性ポリウレタンエラストマー同士をイオン架橋させる形態が好ましい。架橋に用いる多価金属カチオンとしては、2族、4族、8族、11族、12族及び13族の金属のカチオンが挙げられる。具体的には、多価金属のアルコキシド、多価金属の硫酸塩、多価金属の水酸化物、多価金属の炭酸塩、多価金属の酸化物等を分子中にアニオン性置換基を有する熱可塑性ポリウレタンエラストマーと混合することによりイオン架橋を形成することができる。架橋に用いる多価アニオンとしては、硫酸イオン、リン酸イオン、多価カルボン酸塩化合物等が挙げられる。
Examples of ionic substituents contained in the thermoplastic polyurethane elastomer used in the present embodiment include anionic substituents such as carboxylic acid groups, sulfonic acid groups, and phosphoric acid groups, amino groups, and quaternary ammonium groups. And cationic substituents. One kind of these ionic substituents may be contained in the thermoplastic polyurethane elastomer, or two or more kinds of ionic substituents may be contained if there is no problem in the production of the polyurethane elastomer. As the form of ionic crosslinking, a thermoplastic polyurethane elastomer having an anionic substituent in the molecule and a polyvalent metal cation are ionically crosslinked, and a thermoplastic polyurethane having an anionic substituent and a cationic substituent in the molecule Forms in which elastomers are ionically crosslinked, forms in which thermoplastic polyurethane elastomers having cationic substituents in the molecule and polyvalent anions such as sulfate ions and phosphate ions are ionically crosslinked, heat having anionic substituents in the molecules The form etc. which ion-crosslink the thermoplastic polyurethane elastomer and the thermoplastic polyurethane elastomer which has a cationic substituent in a molecule | numerator are mentioned. Among these, from the viewpoint of availability of materials, ease of molding processing, and ease of ionic crosslinking, ionic crosslinking of thermoplastic polyurethane elastomers having an anionic substituent in the molecule and polyvalent metal cations. A form in which the thermoplastic polyurethane elastomer having an anionic substituent and a cationic substituent in the molecule is ionically crosslinked is preferable. Examples of the polyvalent metal cation used for crosslinking include cations of metals of Group 2, Group 4, Group 8, Group 11, Group 12, and Group 13. Specifically, polyvalent metal alkoxide, polyvalent metal sulfate, polyvalent metal hydroxide, polyvalent metal carbonate, polyvalent metal oxide and the like have an anionic substituent in the molecule. Ionic crosslinks can be formed by mixing with thermoplastic polyurethane elastomers. Examples of the polyvalent anion used for crosslinking include sulfate ion, phosphate ion, and polyvalent carboxylate compound.
このような熱可塑性ポリウレタンエラストマーは、一般に公知の方法によって製造することができる。具体的には、有機ジイソシアネート、ポリオール及び鎖延長剤に加えて、イオン性置換基導入化合物を原料として用い、これらを重合させればよい(例えば、特開2004-307833号公報、特開2006-213776号公報等を参照)。この重合反応は、一般に公知であり、原料の配合割合及び重合条件は、使用する原料に応じて適宜調整すればよい。
また、本実施の形態において使用する熱可塑性ポリウレタンエラストマーとして、一般に市販されているものを使用してもよい。 Such a thermoplastic polyurethane elastomer can be generally produced by a known method. Specifically, in addition to the organic diisocyanate, polyol and chain extender, an ionic substituent-introducing compound may be used as a raw material, and these may be polymerized (for example, JP-A Nos. 2004-307833 and 2006-). No. 213776). This polymerization reaction is generally known, and the mixing ratio of the raw materials and the polymerization conditions may be appropriately adjusted according to the raw materials used.
Moreover, you may use what is generally marketed as a thermoplastic polyurethane elastomer used in this Embodiment.
また、本実施の形態において使用する熱可塑性ポリウレタンエラストマーとして、一般に市販されているものを使用してもよい。 Such a thermoplastic polyurethane elastomer can be generally produced by a known method. Specifically, in addition to the organic diisocyanate, polyol and chain extender, an ionic substituent-introducing compound may be used as a raw material, and these may be polymerized (for example, JP-A Nos. 2004-307833 and 2006-). No. 213776). This polymerization reaction is generally known, and the mixing ratio of the raw materials and the polymerization conditions may be appropriately adjusted according to the raw materials used.
Moreover, you may use what is generally marketed as a thermoplastic polyurethane elastomer used in this Embodiment.
熱可塑性ポリウレタンエラストマーの原料となる有機ジイソシアネートとしては、トリレン-2,4-ジイソシアネート、トリレン-2,6-ジイソシアネート、4,4’-ジフェニルメタンジイソシアネート、3-メチルジフェニルメタン-4,4’-ジイソシアネート、m-フェニレンジイソシアネート、p-フェニレンジイソシアネート等が挙げられる。これらは、単独で用いてもよいし、二種類以上を組み合わせて用いてもよい。これらの中でも、入手容易性、ロープ被覆材としての機械的強度及び耐久性の観点から、ジフェニルメタン-4,4’-ジイソシアネートが好ましい。
Examples of the organic diisocyanate used as a raw material for the thermoplastic polyurethane elastomer include tolylene-2,4-diisocyanate, tolylene-2,6-diisocyanate, 4,4′-diphenylmethane diisocyanate, 3-methyldiphenylmethane-4,4′-diisocyanate, m -Phenylene diisocyanate, p-phenylene diisocyanate and the like. These may be used alone or in combination of two or more. Among these, diphenylmethane-4,4'-diisocyanate is preferable from the viewpoints of availability, mechanical strength as a rope coating material, and durability.
熱可塑性ポリウレタンエラストマーの原料となるポリオールとしては、ポリエステルポリオール、ポリカーボネートポリオール、ポリエステルエーテルポリオール、ポリエーテルポリオール、シリコーンポリオール、ポリオレフィンポリオール等が挙げられる。これらは、単独で用いてもよいし、二種類以上を組み合わせて用いてもよい。
Examples of the polyol used as a raw material for the thermoplastic polyurethane elastomer include polyester polyol, polycarbonate polyol, polyester ether polyol, polyether polyol, silicone polyol, and polyolefin polyol. These may be used alone or in combination of two or more.
ポリエステルポリオールとしては、ジカルボン酸又はそのエステル化合物若しくは酸無水物とジオールとの縮合反応で得られるポリエステルポリオール;ε-カプロラクトン等のラクトンモノマーの開環重合で得られるポリラクトンジオール等が挙げられる。ここで、ジカルボン酸としては、コハク酸、アジピン酸、セバシン酸、アゼライン酸等の脂肪族ジカルボン酸;フタル酸、テレフタル酸、イソフタル酸、ナフタレンジカルボン酸等の芳香族ジカルボン酸;ヘキサヒドロテレフタル酸、ヘキサヒドロフタル酸、ヘキサヒドロイソフタル酸等の脂環族ジカルボン酸が使用され、ジオールとしては、エチレングリコール、1,3-プロピレングリコール、1,2-プロピレングリコール、1,3-ブタンジオール、1,4-ブタンジオール、1,5-ペンタンジオール、1,6-ヘキサンジオール、3-メチル-1,5-ペンタンジオール、ネオペンチルグリコール、1,3-オクタンジオール、1,9-ノナンジオール等が使用される。これらは、単独で用いてもよいし、二種類以上を組み合わせて用いてもよい。
Examples of the polyester polyol include a polyester polyol obtained by a condensation reaction of a dicarboxylic acid or its ester compound or acid anhydride and a diol; a polylactone diol obtained by ring-opening polymerization of a lactone monomer such as ε-caprolactone. Here, examples of the dicarboxylic acid include aliphatic dicarboxylic acids such as succinic acid, adipic acid, sebacic acid, and azelaic acid; aromatic dicarboxylic acids such as phthalic acid, terephthalic acid, isophthalic acid, and naphthalenedicarboxylic acid; hexahydroterephthalic acid, An alicyclic dicarboxylic acid such as hexahydrophthalic acid or hexahydroisophthalic acid is used. Examples of the diol include ethylene glycol, 1,3-propylene glycol, 1,2-propylene glycol, 1,3-butanediol, 1, 4-butanediol, 1,5-pentanediol, 1,6-hexanediol, 3-methyl-1,5-pentanediol, neopentyl glycol, 1,3-octanediol, 1,9-nonanediol, etc. are used. Is done. These may be used alone or in combination of two or more.
ポリカーボネートポリオールとしては、エチレングリコール、1,3-プロピレングリコール、1,2-プロピレングリコール、1,3-ブタンジオール、1,4-ブタンジオール、1,5-ペンタンジオール、1,6-ヘキサンジオール、3-メチル-1,5-ペンタンジオール、ネオペンチルグリコール、1,8-オクタンジオール、1,9-ノナンジオール、ジエチレングリコール等の多価アルコールの1種以上と、ジエチレンカーボネート、ジエチルカーボネート等とを反応させて得られるポリカーボネートポリオール等が挙げられる。具体的には、ポリヘキサメチレンカーボネートジオール、ポリトリメチレンカーボネートジオール、ポリ3-メチル(ペンタメチレン)カーボネートジオール、及びこれらの共重合体が挙げられる。これらは、単独で用いてもよいし、二種類以上を組み合わせて用いてもよい。
Examples of the polycarbonate polyol include ethylene glycol, 1,3-propylene glycol, 1,2-propylene glycol, 1,3-butanediol, 1,4-butanediol, 1,5-pentanediol, 1,6-hexanediol, Reaction of one or more polyhydric alcohols such as 3-methyl-1,5-pentanediol, neopentyl glycol, 1,8-octanediol, 1,9-nonanediol and diethylene glycol with diethylene carbonate, diethyl carbonate, etc. And polycarbonate polyols obtained by the above process. Specific examples include polyhexamethylene carbonate diol, polytrimethylene carbonate diol, poly 3-methyl (pentamethylene) carbonate diol, and copolymers thereof. These may be used alone or in combination of two or more.
ポリエステルエーテルポリオールとしては、上記の脂肪族ジカルボン酸、芳香族ジカルボン酸、脂環族ジカルボン酸、または、そのエステル若しくは酸無水物と、ジエチレングリコール、プロピレンオキサイド付加物等のグリコールとの縮合反応物等が挙げられる。これらは、単独で用いてもよいし、二種類以上を組み合わせて用いてもよい。
Examples of the polyester ether polyol include a condensation reaction product of the above aliphatic dicarboxylic acid, aromatic dicarboxylic acid, alicyclic dicarboxylic acid, or an ester or acid anhydride thereof and glycol such as diethylene glycol or propylene oxide adduct. Can be mentioned. These may be used alone or in combination of two or more.
ポリエーテルポリオールとしては、エチレンオキサイド、プロピレンオキサイド、テトラヒドロフラン等の環状エーテルをそれぞれ重合させて得られるポリエチレングリコール、ポリプロピレングリコール、ポリテトラメチレングリコールの他、これらのコポリエーテル等が挙げられる。これらは、単独で用いてもよいし、二種類以上を組み合わせて用いてもよい。
Examples of the polyether polyol include polyethylene glycol, polypropylene glycol and polytetramethylene glycol obtained by polymerizing cyclic ethers such as ethylene oxide, propylene oxide and tetrahydrofuran, and copolyethers thereof. These may be used alone or in combination of two or more.
シリコーンポリオールとしては、末端に活性水素を2個有するジメチルポリシロキサンジオール、メチルフェニルポリシロキサンジオール、アミノ変性シリコーンオイル、両末端ジアミン変性シリコーンオイル、ポリエーテル変性シリコーンオイル、アルコール変性シリコーンオイル、カルボキシル基変性シリコーンオイル、フェニル変性シリコーンオイル等が挙げられる。これらは、単独で用いてもよいし、二種類以上を組み合わせて用いてもよい。
Silicone polyols include dimethylpolysiloxane diol having two active hydrogens at the terminal, methylphenylpolysiloxane diol, amino-modified silicone oil, diamine-modified silicone oil at both ends, polyether-modified silicone oil, alcohol-modified silicone oil, carboxyl group-modified Examples include silicone oil and phenyl-modified silicone oil. These may be used alone or in combination of two or more.
ポリオレフィンポリオールとしては、ポリイソプレンポリオール、ポリブタジエンポリオール、又はそれらのスチレン、アクリロニトリル共重合体及びそれらの水添物等を挙げることができる。これらは、単独で用いてもよいし、二種類以上を組み合わせて用いてもよい。
Examples of the polyolefin polyol include polyisoprene polyol, polybutadiene polyol, or their styrene, acrylonitrile copolymers and hydrogenated products thereof. These may be used alone or in combination of two or more.
これらのポリオールの好ましい数平均分子量は450~4000である。先に説明したように、熱可塑性ポリウレタンエラストマーとしてはエーテル系熱可塑性ポリウレタンエラストマーが好ましいことから、ポリオールとしてはポリテトラメチレングリコールが特に好ましい。
The preferred number average molecular weight of these polyols is 450 to 4000. As explained above, since the thermoplastic polyurethane elastomer is preferably an ether-based thermoplastic polyurethane elastomer, the polyol is particularly preferably polytetramethylene glycol.
熱可塑性ポリウレタンエラストマーの原料となる鎖延長剤としては、数平均分子量が60~450のジオールであればよく、例えば、エタンジオール、ブタンジオール、ペンタンジオール、ヘキサンジオール、ジエチレングリコール、ジプロピレングリコール、シクロヘキサンジオール、ポリテトラメチレングリコール等が挙げられる。これらは、単独で用いてもよいし、二種類以上を組み合わせて用いてもよい。
The chain extender used as a raw material for the thermoplastic polyurethane elastomer may be a diol having a number average molecular weight of 60 to 450, such as ethanediol, butanediol, pentanediol, hexanediol, diethylene glycol, dipropylene glycol, and cyclohexanediol. And polytetramethylene glycol. These may be used alone or in combination of two or more.
熱可塑性ポリウレタンエラストマーの原料となるイオン性置換基導入化合物としては、先に説明したカルボン酸基、スルホン酸基、リン酸基、アミノ基、第4級アンモニウム基等のイオン性置換基と、2個以上の水酸基とを分子中に有する化合物が挙げられる。このような化合物の具体例としては、特開2004-307833号公報に記載されるような2,2-ジアルカノールプロピオン酸、2,4-ジアルカノールベンゼンスルホン酸、N,N-ビス(2-ヒドロキシアルキル)-2-アミノアルカンスルホン酸、ジアルカノールスルファミン酸、これらの酸のアルカリ金属塩又はアンモニウム塩、特開2006-213776号公報に記載されるような分子中に3個以上の水酸基を有するタウリン4級アンモニウム塩等が挙げられる。これらの化合物は、分子中に2個以上の水酸基を有するので、重合時に鎖延長剤としても機能する。
Examples of the ionic substituent-introducing compound used as a raw material for the thermoplastic polyurethane elastomer include ionic substituents such as carboxylic acid group, sulfonic acid group, phosphoric acid group, amino group, and quaternary ammonium group described above, and 2 Examples thereof include compounds having at least one hydroxyl group in the molecule. Specific examples of such compounds include 2,2-dialkanolpropionic acid, 2,4-dialkanolbenzenesulfonic acid, N, N-bis (2- Hydroxyalkyl) -2-aminoalkanesulfonic acid, dialkanol sulfamic acid, alkali metal salts or ammonium salts of these acids, having 3 or more hydroxyl groups in the molecule as described in JP-A-2006-213776 Examples include taurine quaternary ammonium salts. Since these compounds have two or more hydroxyl groups in the molecule, they also function as chain extenders during polymerization.
本実施の形態において、イオン架橋熱可塑性ポリウレタンエラストマーを含む樹脂組成物は、98以下のJIS A硬度及び-20℃以下のガラス転移温度を有することが好ましい。JIS A硬度を98以下と規定した理由は、98を超えるとロープの柔軟性が損なわれ、これをエレベータに適用して駆動させた際の消費電力が増加する傾向があることが発明者らの検討により分かったためである。樹脂組成物のJIS A硬度は、より好ましくは85以上95以下である。
また、樹脂組成物のガラス転移温度を-20℃以下と規定した理由は、樹脂組成物のガラス転移温度が高いほど摩擦係数の滑り速度依存性が小さくなるが、一方で、樹脂組成物のガラス転移温度が高いほど弾性率が大きくなり、これを樹脂被覆層としてエレベータ用ロープに適用した場合、ロープの柔軟性が低下し、樹脂組成物のガラス転移温度よりも高い環境下でロープが繰り返し曲げられると、樹脂被覆層が受ける応力により樹脂被覆層の割れ等の疲労破壊が生じ易くなる傾向があることが発明者らの検討により分かったためである。樹脂組成物のガラス転移温度は、より好ましくは-25℃以下である。 In the present embodiment, the resin composition containing the ion-crosslinked thermoplastic polyurethane elastomer preferably has a JIS A hardness of 98 or less and a glass transition temperature of −20 ° C. or less. The reason why the JIS A hardness is defined as 98 or less is that the flexibility of the rope is impaired when the hardness exceeds 98, and that the power consumption when driven by applying this to an elevator tends to increase. This is because of the examination. The JIS A hardness of the resin composition is more preferably 85 or more and 95 or less.
The reason why the glass transition temperature of the resin composition is specified to be −20 ° C. or lower is that the higher the glass transition temperature of the resin composition is, the smaller the dependency of the friction coefficient on the sliding speed is. The higher the transition temperature, the higher the modulus of elasticity, and when this is applied to an elevator rope as a resin coating layer, the flexibility of the rope decreases, and the rope bends repeatedly in an environment higher than the glass transition temperature of the resin composition. This is because the inventors have found that the stress applied to the resin coating layer tends to cause fatigue failure such as cracking of the resin coating layer. The glass transition temperature of the resin composition is more preferably −25 ° C. or lower.
また、樹脂組成物のガラス転移温度を-20℃以下と規定した理由は、樹脂組成物のガラス転移温度が高いほど摩擦係数の滑り速度依存性が小さくなるが、一方で、樹脂組成物のガラス転移温度が高いほど弾性率が大きくなり、これを樹脂被覆層としてエレベータ用ロープに適用した場合、ロープの柔軟性が低下し、樹脂組成物のガラス転移温度よりも高い環境下でロープが繰り返し曲げられると、樹脂被覆層が受ける応力により樹脂被覆層の割れ等の疲労破壊が生じ易くなる傾向があることが発明者らの検討により分かったためである。樹脂組成物のガラス転移温度は、より好ましくは-25℃以下である。 In the present embodiment, the resin composition containing the ion-crosslinked thermoplastic polyurethane elastomer preferably has a JIS A hardness of 98 or less and a glass transition temperature of −20 ° C. or less. The reason why the JIS A hardness is defined as 98 or less is that the flexibility of the rope is impaired when the hardness exceeds 98, and that the power consumption when driven by applying this to an elevator tends to increase. This is because of the examination. The JIS A hardness of the resin composition is more preferably 85 or more and 95 or less.
The reason why the glass transition temperature of the resin composition is specified to be −20 ° C. or lower is that the higher the glass transition temperature of the resin composition is, the smaller the dependency of the friction coefficient on the sliding speed is. The higher the transition temperature, the higher the modulus of elasticity, and when this is applied to an elevator rope as a resin coating layer, the flexibility of the rope decreases, and the rope bends repeatedly in an environment higher than the glass transition temperature of the resin composition. This is because the inventors have found that the stress applied to the resin coating layer tends to cause fatigue failure such as cracking of the resin coating layer. The glass transition temperature of the resin composition is more preferably −25 ° C. or lower.
樹脂被覆層を形成する樹脂組成物には、温度や滑り速度に対して摩擦係数をより安定させるために、無機充填材を更に混合することもできる。このような無機充填材としては、例えば、炭酸カルシウム、シリカ、酸化チタン、カーボンブラック、アセチレンブラック、硫酸バリウム等の球状無機充填材、カーボン繊維、ガラス繊維等の繊維状無機充填材、マイカ、タルク、ベントナイト等の板状無機充填材が挙げられる。これらは、単独で用いてもよいし、二種類以上を組み合わせて用いてもよい。これらの中でも、摩擦係数の変動をより小さくするために、繊維状無機充填材及び板状無機充填材の少なくとも1種を用いることが好ましい。またこれらの無機充填材の硬度は特に問わない。これらの無機充填材の配合量は、樹脂組成物のJIS A硬度が98以下及びガラス転移温度が-20℃以下となる範囲で適宜調整すればよい。
In the resin composition forming the resin coating layer, an inorganic filler can be further mixed in order to further stabilize the coefficient of friction with respect to temperature and sliding speed. Examples of such inorganic fillers include spherical inorganic fillers such as calcium carbonate, silica, titanium oxide, carbon black, acetylene black, and barium sulfate, fibrous inorganic fillers such as carbon fiber and glass fiber, mica, and talc. And plate-like inorganic fillers such as bentonite. These may be used alone or in combination of two or more. Among these, it is preferable to use at least one of a fibrous inorganic filler and a plate-like inorganic filler in order to reduce the variation of the friction coefficient. The hardness of these inorganic fillers is not particularly limited. The blending amount of these inorganic fillers may be appropriately adjusted within a range where the JIS A hardness of the resin composition is 98 or less and the glass transition temperature is −20 ° C. or less.
なお、本実施の形態に係るエレベータ用ロープは、ロープ本体の外周を被覆する最外層の樹脂材料に特徴があるため、ロープ本体の構造は特に限定されるものではないが、ロープ本体は、一般には、複数の鋼製素線を撚り合わせて構成されるストランドもしくはコードを荷重支持部材として含む。本実施の形態におけるロープ本体は、上記したストランドもしくはコードを含むベルト状のものであってもよい。また、ロープ本体と樹脂被覆層との密着性を向上させるために、ケムロック(登録商標)218(ロードファーイースト社製)のような金属及びポリウレタン用接着剤を上記したストランドもしくはコードに予め塗布しておくことが好ましい。また本実施の形態に係るエレベータ用ロープは、最外層の樹脂が被覆された後、接着剤の硬化のために100~120℃程度に加熱される。
The elevator rope according to the present embodiment is characterized by the outermost resin material covering the outer periphery of the rope body, so the structure of the rope body is not particularly limited. Includes a strand or a cord formed by twisting a plurality of steel strands as a load supporting member. The rope body in the present embodiment may be in the form of a belt including the above-described strands or cords. In addition, in order to improve the adhesion between the rope body and the resin coating layer, a metal such as Chemlock (registered trademark) 218 (manufactured by Road Far East) and an adhesive for polyurethane are preliminarily applied to the above strands or cords. It is preferable to keep it. The elevator rope according to the present embodiment is heated to about 100 to 120 ° C. for curing the adhesive after the outermost resin layer is coated.
本実施の形態によれば、エレベータかごの静止状態の維持に必要となる微小滑り速度域から運転中のエレベータを非常停止あるいは急停止させる際の大きな滑り速度域までの広範囲な滑り速度において、摩擦係数の変動が小さいエレベータ用ロープを得ることができる。
このエレベータ用ロープを備えるエレベータ装置は、微小な滑り速度から通常運転時の滑り速度に至る広範囲な滑り速度において乗りかごを安定して制動させることができる。 According to the present embodiment, in a wide range of sliding speeds from a small sliding speed range required for maintaining the elevator car to a stationary state to a large sliding speed range when the elevator in operation is emergency stopped or suddenly stopped, friction is generated. An elevator rope having a small coefficient variation can be obtained.
An elevator apparatus including the elevator rope can stably brake a car in a wide range of sliding speeds from a very small sliding speed to a sliding speed during normal operation.
このエレベータ用ロープを備えるエレベータ装置は、微小な滑り速度から通常運転時の滑り速度に至る広範囲な滑り速度において乗りかごを安定して制動させることができる。 According to the present embodiment, in a wide range of sliding speeds from a small sliding speed range required for maintaining the elevator car to a stationary state to a large sliding speed range when the elevator in operation is emergency stopped or suddenly stopped, friction is generated. An elevator rope having a small coefficient variation can be obtained.
An elevator apparatus including the elevator rope can stably brake a car in a wide range of sliding speeds from a very small sliding speed to a sliding speed during normal operation.
また、イオン架橋反応は可逆反応であることから、本実施の形態において使用する熱可塑性ポリウレタンエラストマーは、汎用的な非架橋型の熱可塑性ポリウレタンエラストマーと同様のプロセス(樹脂を加熱溶融して被覆成形した後、冷却する)により成形とイオン架橋とを行うことができる。従って、本実施の形態では、架橋のための加熱硬化や光照射等の追加プロセスが不要であるという利点もある。
In addition, since the ionic crosslinking reaction is a reversible reaction, the thermoplastic polyurethane elastomer used in this embodiment is the same process as a general-purpose non-crosslinking thermoplastic polyurethane elastomer (coating molding by heating and melting the resin). And then cooling) to perform molding and ionic crosslinking. Therefore, in this embodiment, there is an advantage that an additional process such as heat curing for crosslinking and light irradiation is unnecessary.
以下、実施例及び比較例によって本発明を更に詳細に説明するが、本発明はこれらに限定されるものではない。
<実施例1>
4,4’-ジフェニルメタンジイソシアネート、数平均分子量2000のポリテトラメチレングリコール及び1,4-ブタンジオールとN,N-ビス(2-ヒドロキシエチル)-2-アミノエタンスルホン酸との鎖延長剤混合物(1,4-ブタンジオールとN,N-ビス(2-ヒドロキシエチル)-2-アミノエタンスルホン酸とのモル比が2:1)を重合させ、エーテル系熱可塑性ポリウレタンエラストマーを得た。なお、各成分の使用量は、4,4’-ジフェニルメタンジイソシアネートのイソシアネート当量1に対して、ポリテトラメチレングリコール、1,4-ブタンジオール及びN,N-ビス(2-ヒドロキシエチル)-2-アミノエタンスルホン酸の水酸基当量の和が1となるようにした。
次に、得られたエーテル系熱可塑性ポリウレタンエラストマーに、多価金属含有化合物としてテトラブチルチタネートを添加し、混合することで、イオン架橋熱可塑性ポリウレタンエラストマー(JIS A硬度85、ガラス転移温度-41℃)を得た。なお、テトラブチルチタネートは、エーテル系熱可塑性ポリウレタンエラストマーを得る際に仕込んだN,N-ビス(2-ヒドロキシエチル)-2-アミノエタンスルホン酸1モルに対して、0.2モル使用した。
次に、得られたイオン架橋熱可塑性ポリウレタンエラストマーを押出成形機に供給し、ロープ本体の外周を覆うように押出成形を行い、ロープ本体の外周に樹脂被覆層を成形した。ロープ本体を樹脂被覆層で覆った後、樹脂被覆層の物性を安定させるために110℃で2時間加熱し、直径12mmのエレベータ用ロープを得た。なお、得られたエレベータ用ロープは、国際公開第2003/050348号の図1に記載される断面構造を有するものである。ここで、ロープ本体は、複数の鋼製素線が撚り合わされている複数の芯子縄と複数の鋼製素線が撚り合わされている複数の内層子縄とを有する内層ロープと、内層ロープの外周を被覆する樹脂製の内層被覆体と、内層被覆体の外周部に設けられ、複数の鋼製素線が撚り合わされている複数の外層子縄を有する外層ロープとからなるものに相当し、樹脂被覆層は外層被覆体に相当する。ロープ本体を各樹脂組成物で被覆する前に、外層子縄にケムロック(登録商標)218(ロードファーイースト社製)を塗布し乾燥させておいた。 Hereinafter, although an example and a comparative example explain the present invention still in detail, the present invention is not limited to these.
<Example 1>
Chain extender mixture of 4,4′-diphenylmethane diisocyanate, polytetramethylene glycol having a number average molecular weight of 2000 and 1,4-butanediol and N, N-bis (2-hydroxyethyl) -2-aminoethanesulfonic acid ( 1,4-butanediol and N, N-bis (2-hydroxyethyl) -2-aminoethanesulfonic acid in a molar ratio of 2: 1) were polymerized to obtain an ether-based thermoplastic polyurethane elastomer. The amount of each component used was polytetramethylene glycol, 1,4-butanediol, and N, N-bis (2-hydroxyethyl) -2- with respect to an isocyanate equivalent of 1 of 4,4′-diphenylmethane diisocyanate. The sum of hydroxyl equivalents of aminoethanesulfonic acid was set to 1.
Next, tetrabutyl titanate as a polyvalent metal-containing compound was added to and mixed with the ether-based thermoplastic polyurethane elastomer thus obtained, so that an ion-crosslinked thermoplastic polyurethane elastomer (JIS A hardness 85, glass transition temperature −41 ° C.). ) Tetrabutyl titanate was used in an amount of 0.2 mol with respect to 1 mol of N, N-bis (2-hydroxyethyl) -2-aminoethanesulfonic acid charged when the ether-based thermoplastic polyurethane elastomer was obtained.
Next, the obtained ion-crosslinked thermoplastic polyurethane elastomer was supplied to an extruder, extrusion was performed so as to cover the outer periphery of the rope body, and a resin coating layer was formed on the outer periphery of the rope body. After covering the rope main body with the resin coating layer, in order to stabilize the physical properties of the resin coating layer, it was heated at 110 ° C. for 2 hours to obtain an elevator rope having a diameter of 12 mm. In addition, the obtained rope for elevators has a cross-sectional structure described in FIG. 1 of International Publication No. 2003/050348. Here, the rope body includes an inner layer rope having a plurality of core ropes in which a plurality of steel strands are twisted together and a plurality of inner layer strands in which a plurality of steel strands are twisted, and an inner layer rope Corresponding to an inner layer covering made of resin covering the outer periphery, an outer layer rope provided on the outer periphery of the inner layer covering, and having an outer layer rope with a plurality of steel strands twisted together, The resin coating layer corresponds to the outer layer covering. Before the rope body was coated with each resin composition, Chemlock (registered trademark) 218 (manufactured by Road Far East) was applied to the outer layer cord and dried.
<実施例1>
4,4’-ジフェニルメタンジイソシアネート、数平均分子量2000のポリテトラメチレングリコール及び1,4-ブタンジオールとN,N-ビス(2-ヒドロキシエチル)-2-アミノエタンスルホン酸との鎖延長剤混合物(1,4-ブタンジオールとN,N-ビス(2-ヒドロキシエチル)-2-アミノエタンスルホン酸とのモル比が2:1)を重合させ、エーテル系熱可塑性ポリウレタンエラストマーを得た。なお、各成分の使用量は、4,4’-ジフェニルメタンジイソシアネートのイソシアネート当量1に対して、ポリテトラメチレングリコール、1,4-ブタンジオール及びN,N-ビス(2-ヒドロキシエチル)-2-アミノエタンスルホン酸の水酸基当量の和が1となるようにした。
次に、得られたエーテル系熱可塑性ポリウレタンエラストマーに、多価金属含有化合物としてテトラブチルチタネートを添加し、混合することで、イオン架橋熱可塑性ポリウレタンエラストマー(JIS A硬度85、ガラス転移温度-41℃)を得た。なお、テトラブチルチタネートは、エーテル系熱可塑性ポリウレタンエラストマーを得る際に仕込んだN,N-ビス(2-ヒドロキシエチル)-2-アミノエタンスルホン酸1モルに対して、0.2モル使用した。
次に、得られたイオン架橋熱可塑性ポリウレタンエラストマーを押出成形機に供給し、ロープ本体の外周を覆うように押出成形を行い、ロープ本体の外周に樹脂被覆層を成形した。ロープ本体を樹脂被覆層で覆った後、樹脂被覆層の物性を安定させるために110℃で2時間加熱し、直径12mmのエレベータ用ロープを得た。なお、得られたエレベータ用ロープは、国際公開第2003/050348号の図1に記載される断面構造を有するものである。ここで、ロープ本体は、複数の鋼製素線が撚り合わされている複数の芯子縄と複数の鋼製素線が撚り合わされている複数の内層子縄とを有する内層ロープと、内層ロープの外周を被覆する樹脂製の内層被覆体と、内層被覆体の外周部に設けられ、複数の鋼製素線が撚り合わされている複数の外層子縄を有する外層ロープとからなるものに相当し、樹脂被覆層は外層被覆体に相当する。ロープ本体を各樹脂組成物で被覆する前に、外層子縄にケムロック(登録商標)218(ロードファーイースト社製)を塗布し乾燥させておいた。 Hereinafter, although an example and a comparative example explain the present invention still in detail, the present invention is not limited to these.
<Example 1>
Chain extender mixture of 4,4′-diphenylmethane diisocyanate, polytetramethylene glycol having a number average molecular weight of 2000 and 1,4-butanediol and N, N-bis (2-hydroxyethyl) -2-aminoethanesulfonic acid ( 1,4-butanediol and N, N-bis (2-hydroxyethyl) -2-aminoethanesulfonic acid in a molar ratio of 2: 1) were polymerized to obtain an ether-based thermoplastic polyurethane elastomer. The amount of each component used was polytetramethylene glycol, 1,4-butanediol, and N, N-bis (2-hydroxyethyl) -2- with respect to an isocyanate equivalent of 1 of 4,4′-diphenylmethane diisocyanate. The sum of hydroxyl equivalents of aminoethanesulfonic acid was set to 1.
Next, tetrabutyl titanate as a polyvalent metal-containing compound was added to and mixed with the ether-based thermoplastic polyurethane elastomer thus obtained, so that an ion-crosslinked thermoplastic polyurethane elastomer (JIS A hardness 85, glass transition temperature −41 ° C.). ) Tetrabutyl titanate was used in an amount of 0.2 mol with respect to 1 mol of N, N-bis (2-hydroxyethyl) -2-aminoethanesulfonic acid charged when the ether-based thermoplastic polyurethane elastomer was obtained.
Next, the obtained ion-crosslinked thermoplastic polyurethane elastomer was supplied to an extruder, extrusion was performed so as to cover the outer periphery of the rope body, and a resin coating layer was formed on the outer periphery of the rope body. After covering the rope main body with the resin coating layer, in order to stabilize the physical properties of the resin coating layer, it was heated at 110 ° C. for 2 hours to obtain an elevator rope having a diameter of 12 mm. In addition, the obtained rope for elevators has a cross-sectional structure described in FIG. 1 of International Publication No. 2003/050348. Here, the rope body includes an inner layer rope having a plurality of core ropes in which a plurality of steel strands are twisted together and a plurality of inner layer strands in which a plurality of steel strands are twisted, and an inner layer rope Corresponding to an inner layer covering made of resin covering the outer periphery, an outer layer rope provided on the outer periphery of the inner layer covering, and having an outer layer rope with a plurality of steel strands twisted together, The resin coating layer corresponds to the outer layer covering. Before the rope body was coated with each resin composition, Chemlock (registered trademark) 218 (manufactured by Road Far East) was applied to the outer layer cord and dried.
<実施例2>
ポリテトラメチレングリコールと鎖延長剤混合物との使用割合を変えたこと以外は、実施例1と同様にしてイオン架橋熱可塑性ポリウレタンエラストマー(JIS A硬度95、ガラス転移温度-32℃)を得た。
得られたイオン架橋熱可塑性ポリウレタンエラストマーを用いて実施例1と同様にしてエレベータ用ロープを得た。 <Example 2>
An ion-crosslinked thermoplastic polyurethane elastomer (JIS A hardness 95, glass transition temperature -32 ° C.) was obtained in the same manner as in Example 1 except that the ratio of the polytetramethylene glycol and the chain extender mixture was changed.
An elevator rope was obtained in the same manner as in Example 1 by using the obtained ion-crosslinked thermoplastic polyurethane elastomer.
ポリテトラメチレングリコールと鎖延長剤混合物との使用割合を変えたこと以外は、実施例1と同様にしてイオン架橋熱可塑性ポリウレタンエラストマー(JIS A硬度95、ガラス転移温度-32℃)を得た。
得られたイオン架橋熱可塑性ポリウレタンエラストマーを用いて実施例1と同様にしてエレベータ用ロープを得た。 <Example 2>
An ion-crosslinked thermoplastic polyurethane elastomer (JIS A hardness 95, glass transition temperature -32 ° C.) was obtained in the same manner as in Example 1 except that the ratio of the polytetramethylene glycol and the chain extender mixture was changed.
An elevator rope was obtained in the same manner as in Example 1 by using the obtained ion-crosslinked thermoplastic polyurethane elastomer.
<実施例3>
4,4’-ジフェニルメタンジイソシアネート、数平均分子量2000のポリテトラメチレングリコール及び1,4-ブタンジオールと下記式(1)で表されるタウリン4級アンモニウム塩との鎖延長剤混合物(1,4-ブタンジオールとタウリン4級アンモニウム塩とのモル比が7:1)を重合させ、イオン架橋熱可塑性ポリウレタンエラストマー(JIS A硬度85、ガラス転移温度-41℃)を得た。なお、各成分の使用量は、4,4’-ジフェニルメタンジイソシアネートのイソシアネート当量1に対して、ポリテトラメチレングリコール、1,4-ブタンジオール及びタウリン4級アンモニウム塩の水酸基当量の和が1となるようにした。
得られたイオン架橋熱可塑性ポリウレタンエラストマーを用いて実施例1と同様にしてエレベータ用ロープを得た。 <Example 3>
Chain extender mixture of 1,4'-diphenylmethane diisocyanate, polytetramethylene glycol having a number average molecular weight of 2000 and 1,4-butanediol and a taurine quaternary ammonium salt represented by the following formula (1) (1,4- A molar ratio of butanediol and taurine quaternary ammonium salt (7: 1) was polymerized to obtain an ion-crosslinked thermoplastic polyurethane elastomer (JIS A hardness 85, glass transition temperature -41 ° C.). The amount of each component used is 1 for the equivalent of 1 for 4,4′-diphenylmethane diisocyanate and 1 for the hydroxyl equivalent of polytetramethylene glycol, 1,4-butanediol, and taurine quaternary ammonium salt. I did it.
An elevator rope was obtained in the same manner as in Example 1 by using the obtained ion-crosslinked thermoplastic polyurethane elastomer.
4,4’-ジフェニルメタンジイソシアネート、数平均分子量2000のポリテトラメチレングリコール及び1,4-ブタンジオールと下記式(1)で表されるタウリン4級アンモニウム塩との鎖延長剤混合物(1,4-ブタンジオールとタウリン4級アンモニウム塩とのモル比が7:1)を重合させ、イオン架橋熱可塑性ポリウレタンエラストマー(JIS A硬度85、ガラス転移温度-41℃)を得た。なお、各成分の使用量は、4,4’-ジフェニルメタンジイソシアネートのイソシアネート当量1に対して、ポリテトラメチレングリコール、1,4-ブタンジオール及びタウリン4級アンモニウム塩の水酸基当量の和が1となるようにした。
得られたイオン架橋熱可塑性ポリウレタンエラストマーを用いて実施例1と同様にしてエレベータ用ロープを得た。 <Example 3>
Chain extender mixture of 1,4'-diphenylmethane diisocyanate, polytetramethylene glycol having a number average molecular weight of 2000 and 1,4-butanediol and a taurine quaternary ammonium salt represented by the following formula (1) (1,4- A molar ratio of butanediol and taurine quaternary ammonium salt (7: 1) was polymerized to obtain an ion-crosslinked thermoplastic polyurethane elastomer (JIS A hardness 85, glass transition temperature -41 ° C.). The amount of each component used is 1 for the equivalent of 1 for 4,4′-diphenylmethane diisocyanate and 1 for the hydroxyl equivalent of polytetramethylene glycol, 1,4-butanediol, and taurine quaternary ammonium salt. I did it.
An elevator rope was obtained in the same manner as in Example 1 by using the obtained ion-crosslinked thermoplastic polyurethane elastomer.
<実施例4>
ポリテトラメチレングリコールと鎖延長剤混合物との使用割合を変えたこと以外は、実施例3と同様にしてイオン架橋熱可塑性ポリウレタンエラストマー(JIS A硬度95、ガラス転移温度-33℃)を得た。
得られたイオン架橋熱可塑性ポリウレタンエラストマーを用いて実施例1と同様にしてエレベータ用ロープを得た。 <Example 4>
An ion-crosslinked thermoplastic polyurethane elastomer (JIS A hardness 95, glass transition temperature −33 ° C.) was obtained in the same manner as in Example 3 except that the ratio of polytetramethylene glycol and the chain extender mixture was changed.
An elevator rope was obtained in the same manner as in Example 1 by using the obtained ion-crosslinked thermoplastic polyurethane elastomer.
ポリテトラメチレングリコールと鎖延長剤混合物との使用割合を変えたこと以外は、実施例3と同様にしてイオン架橋熱可塑性ポリウレタンエラストマー(JIS A硬度95、ガラス転移温度-33℃)を得た。
得られたイオン架橋熱可塑性ポリウレタンエラストマーを用いて実施例1と同様にしてエレベータ用ロープを得た。 <Example 4>
An ion-crosslinked thermoplastic polyurethane elastomer (JIS A hardness 95, glass transition temperature −33 ° C.) was obtained in the same manner as in Example 3 except that the ratio of polytetramethylene glycol and the chain extender mixture was changed.
An elevator rope was obtained in the same manner as in Example 1 by using the obtained ion-crosslinked thermoplastic polyurethane elastomer.
<実施例5>
実施例2で得られたイオン架橋熱可塑性ポリウレタンエラストマーに酸化チタンを9.1重量%添加した樹脂組成物(JIS A硬度97、ガラス転移温度-31℃)を用いて実施例1と同様にしてエレベータ用ロープを得た。 <Example 5>
The resin composition (JIS A hardness 97, glass transition temperature -31 ° C.) obtained by adding 9.1% by weight of titanium oxide to the ion-crosslinked thermoplastic polyurethane elastomer obtained in Example 2 was used in the same manner as in Example 1. An elevator rope was obtained.
実施例2で得られたイオン架橋熱可塑性ポリウレタンエラストマーに酸化チタンを9.1重量%添加した樹脂組成物(JIS A硬度97、ガラス転移温度-31℃)を用いて実施例1と同様にしてエレベータ用ロープを得た。 <Example 5>
The resin composition (JIS A hardness 97, glass transition temperature -31 ° C.) obtained by adding 9.1% by weight of titanium oxide to the ion-crosslinked thermoplastic polyurethane elastomer obtained in Example 2 was used in the same manner as in Example 1. An elevator rope was obtained.
<実施例6>
実施例2で得られたイオン架橋熱可塑性ポリウレタンエラストマーにガラス繊維(繊維長約1mm)4.8重量%添加した樹脂組成物(JIS A硬度97、ガラス転移温度-30℃)を用いて実施例1と同様にしてエレベータ用ロープを得た。 <Example 6>
Example using a resin composition (JIS A hardness 97, glass transition temperature -30 ° C.) obtained by adding 4.8% by weight of glass fiber (fiber length: about 1 mm) to the ion-crosslinked thermoplastic polyurethane elastomer obtained in Example 2 In the same manner as in No. 1, an elevator rope was obtained.
実施例2で得られたイオン架橋熱可塑性ポリウレタンエラストマーにガラス繊維(繊維長約1mm)4.8重量%添加した樹脂組成物(JIS A硬度97、ガラス転移温度-30℃)を用いて実施例1と同様にしてエレベータ用ロープを得た。 <Example 6>
Example using a resin composition (JIS A hardness 97, glass transition temperature -30 ° C.) obtained by adding 4.8% by weight of glass fiber (fiber length: about 1 mm) to the ion-crosslinked thermoplastic polyurethane elastomer obtained in Example 2 In the same manner as in No. 1, an elevator rope was obtained.
<実施例7>
実施例2で得られたイオン架橋熱可塑性ポリウレタンエラストマーにタルクを9.1重量%添加した樹脂組成物(JIS A硬度96、ガラス転移温度-32℃)を用いて実施例1と同様にしてエレベータ用ロープを得た。 <Example 7>
Using the resin composition obtained by adding 9.1% by weight of talc to the ion-crosslinked thermoplastic polyurethane elastomer obtained in Example 2 (JIS A hardness 96, glass transition temperature -32 ° C.), an elevator was carried out in the same manner as in Example 1. I got a rope for it.
実施例2で得られたイオン架橋熱可塑性ポリウレタンエラストマーにタルクを9.1重量%添加した樹脂組成物(JIS A硬度96、ガラス転移温度-32℃)を用いて実施例1と同様にしてエレベータ用ロープを得た。 <Example 7>
Using the resin composition obtained by adding 9.1% by weight of talc to the ion-crosslinked thermoplastic polyurethane elastomer obtained in Example 2 (JIS A hardness 96, glass transition temperature -32 ° C.), an elevator was carried out in the same manner as in Example 1. I got a rope for it.
<比較例1>
4,4’-ジフェニルメタンジイソシアネート、数平均分子量2000のポリテトラメチレングリコール及び1,4-ブタンジオールを重合させ、エーテル系熱可塑性ポリウレタンエラストマー(JIS A硬度85、ガラス転移温度-43℃)を得た。なお、各成分の使用量は、4,4’-ジフェニルメタンジイソシアネートのイソシアネート当量1に対して、ポリテトラメチレングリコール及び1,4-ブタンジオールの水酸基当量の和が1となるようにした。
得られたエーテル系熱可塑性ポリウレタンエラストマーを用いて実施例1と同様にしてエレベータ用ロープを得た。 <Comparative Example 1>
4,4′-diphenylmethane diisocyanate, polytetramethylene glycol having a number average molecular weight of 2000 and 1,4-butanediol were polymerized to obtain an ether-based thermoplastic polyurethane elastomer (JIS A hardness 85, glass transition temperature −43 ° C.). . The amount of each component used was set so that the sum of the hydroxyl equivalents of polytetramethylene glycol and 1,4-butanediol was 1 with respect to the isocyanate equivalent of 1 of 4,4′-diphenylmethane diisocyanate.
An elevator rope was obtained in the same manner as in Example 1 using the obtained ether-based thermoplastic polyurethane elastomer.
4,4’-ジフェニルメタンジイソシアネート、数平均分子量2000のポリテトラメチレングリコール及び1,4-ブタンジオールを重合させ、エーテル系熱可塑性ポリウレタンエラストマー(JIS A硬度85、ガラス転移温度-43℃)を得た。なお、各成分の使用量は、4,4’-ジフェニルメタンジイソシアネートのイソシアネート当量1に対して、ポリテトラメチレングリコール及び1,4-ブタンジオールの水酸基当量の和が1となるようにした。
得られたエーテル系熱可塑性ポリウレタンエラストマーを用いて実施例1と同様にしてエレベータ用ロープを得た。 <Comparative Example 1>
4,4′-diphenylmethane diisocyanate, polytetramethylene glycol having a number average molecular weight of 2000 and 1,4-butanediol were polymerized to obtain an ether-based thermoplastic polyurethane elastomer (JIS A hardness 85, glass transition temperature −43 ° C.). . The amount of each component used was set so that the sum of the hydroxyl equivalents of polytetramethylene glycol and 1,4-butanediol was 1 with respect to the isocyanate equivalent of 1 of 4,4′-diphenylmethane diisocyanate.
An elevator rope was obtained in the same manner as in Example 1 using the obtained ether-based thermoplastic polyurethane elastomer.
<比較例2>
ポリテトラメチレングリコールと1,4-ブタンジオールとの使用割合を変えたこと以外は、比較例1と同様にしてエーテル系熱可塑性ポリウレタンエラストマー(JIS A硬度95、ガラス転移温度-30℃)を得た。
得られたエーテル系熱可塑性ポリウレタンエラストマーを用いて実施例1と同様にしてエレベータ用ロープを得た。 <Comparative example 2>
An ether-based thermoplastic polyurethane elastomer (JIS A hardness 95, glass transition temperature -30 ° C.) was obtained in the same manner as in Comparative Example 1 except that the ratio of polytetramethylene glycol and 1,4-butanediol was changed. It was.
An elevator rope was obtained in the same manner as in Example 1 using the obtained ether-based thermoplastic polyurethane elastomer.
ポリテトラメチレングリコールと1,4-ブタンジオールとの使用割合を変えたこと以外は、比較例1と同様にしてエーテル系熱可塑性ポリウレタンエラストマー(JIS A硬度95、ガラス転移温度-30℃)を得た。
得られたエーテル系熱可塑性ポリウレタンエラストマーを用いて実施例1と同様にしてエレベータ用ロープを得た。 <Comparative example 2>
An ether-based thermoplastic polyurethane elastomer (JIS A hardness 95, glass transition temperature -30 ° C.) was obtained in the same manner as in Comparative Example 1 except that the ratio of polytetramethylene glycol and 1,4-butanediol was changed. It was.
An elevator rope was obtained in the same manner as in Example 1 using the obtained ether-based thermoplastic polyurethane elastomer.
<比較例3>
4,4’-ジフェニルメタンジイソシアネート、数平均分子量2000のポリテトラメチレングリコール及び1,4-ブタンジオールとN,N-ビス(2-ヒドロキシエチル)-2-アミノエタンスルホン酸との鎖延長剤混合物(1,4-ブタンジオールとN,N-ビス(2-ヒドロキシエチル)-2-アミノエタンスルホン酸とのモル比が2:1)を重合させ、エーテル系熱可塑性ポリウレタンエラストマー(JIS A硬度85、ガラス転移温度-41℃)を得た。なお、各成分の使用量は、4,4’-ジフェニルメタンジイソシアネートのイソシアネート当量1に対して、ポリテトラメチレングリコール、1,4-ブタンジオール及びN,N-ビス(2-ヒドロキシエチル)-2-アミノエタンスルホン酸の水酸基当量の和が1となるようにした。
得られたエーテル系熱可塑性ポリウレタンエラストマーを用いて実施例1と同様にしてエレベータ用ロープを得た。 <Comparative Example 3>
Chain extender mixture of 4,4′-diphenylmethane diisocyanate, polytetramethylene glycol having a number average molecular weight of 2000 and 1,4-butanediol and N, N-bis (2-hydroxyethyl) -2-aminoethanesulfonic acid ( 1,4-butanediol and N, N-bis (2-hydroxyethyl) -2-aminoethanesulfonic acid in a molar ratio of 2: 1) were polymerized to obtain an ether-based thermoplastic polyurethane elastomer (JIS A hardness 85, Glass transition temperature -41 ° C.). The amount of each component used was polytetramethylene glycol, 1,4-butanediol, and N, N-bis (2-hydroxyethyl) -2- with respect to an isocyanate equivalent of 1 of 4,4′-diphenylmethane diisocyanate. The sum of hydroxyl equivalents of aminoethanesulfonic acid was set to 1.
An elevator rope was obtained in the same manner as in Example 1 using the obtained ether-based thermoplastic polyurethane elastomer.
4,4’-ジフェニルメタンジイソシアネート、数平均分子量2000のポリテトラメチレングリコール及び1,4-ブタンジオールとN,N-ビス(2-ヒドロキシエチル)-2-アミノエタンスルホン酸との鎖延長剤混合物(1,4-ブタンジオールとN,N-ビス(2-ヒドロキシエチル)-2-アミノエタンスルホン酸とのモル比が2:1)を重合させ、エーテル系熱可塑性ポリウレタンエラストマー(JIS A硬度85、ガラス転移温度-41℃)を得た。なお、各成分の使用量は、4,4’-ジフェニルメタンジイソシアネートのイソシアネート当量1に対して、ポリテトラメチレングリコール、1,4-ブタンジオール及びN,N-ビス(2-ヒドロキシエチル)-2-アミノエタンスルホン酸の水酸基当量の和が1となるようにした。
得られたエーテル系熱可塑性ポリウレタンエラストマーを用いて実施例1と同様にしてエレベータ用ロープを得た。 <Comparative Example 3>
Chain extender mixture of 4,4′-diphenylmethane diisocyanate, polytetramethylene glycol having a number average molecular weight of 2000 and 1,4-butanediol and N, N-bis (2-hydroxyethyl) -2-aminoethanesulfonic acid ( 1,4-butanediol and N, N-bis (2-hydroxyethyl) -2-aminoethanesulfonic acid in a molar ratio of 2: 1) were polymerized to obtain an ether-based thermoplastic polyurethane elastomer (JIS A hardness 85, Glass transition temperature -41 ° C.). The amount of each component used was polytetramethylene glycol, 1,4-butanediol, and N, N-bis (2-hydroxyethyl) -2- with respect to an isocyanate equivalent of 1 of 4,4′-diphenylmethane diisocyanate. The sum of hydroxyl equivalents of aminoethanesulfonic acid was set to 1.
An elevator rope was obtained in the same manner as in Example 1 using the obtained ether-based thermoplastic polyurethane elastomer.
〔樹脂組成物のJIS A硬度〕
JIS K7215に従い、タイプAデュロメータを用いてデュロメータA硬さを測定した。 [JIS A hardness of resin composition]
According to JIS K7215, the durometer A hardness was measured using a type A durometer.
JIS K7215に従い、タイプAデュロメータを用いてデュロメータA硬さを測定した。 [JIS A hardness of resin composition]
According to JIS K7215, the durometer A hardness was measured using a type A durometer.
〔樹脂組成物のガラス転移温度(Tg)の測定〕
樹脂組成物のガラス転移温度は以下のように測定した。実施例及び比較例それぞれに用いた樹脂被覆層と同一組成の樹脂組成物を射出成形機に供給し、100mm×100mm×厚さ2mmの平板に成形し、110℃で2時間加熱した後、その中心部から50mm×10mm×厚さ2mmの試験片を切り出した。セイコーインスツルメンツ株式会社製の粘弾性スペクトロメータDMS120を用い、変形モード曲げモード、測定周波数10Hz、昇温速度2℃/分、加振振幅10μmの条件で、試験片の損失弾性率を測定し、損失弾性率のピーク温度をガラス転移温度とした。 [Measurement of Glass Transition Temperature (Tg) of Resin Composition]
The glass transition temperature of the resin composition was measured as follows. A resin composition having the same composition as the resin coating layer used in each of the examples and comparative examples was supplied to an injection molding machine, molded into a flat plate of 100 mm × 100 mm × thickness 2 mm, heated at 110 ° C. for 2 hours, A test piece of 50 mm × 10 mm × thickness 2 mm was cut out from the center. Using a viscoelastic spectrometer DMS120 manufactured by Seiko Instruments Inc., the loss elastic modulus of the test piece was measured under the conditions of deformation mode bending mode, measurement frequency 10 Hz, heating rate 2 ° C./min, and excitation amplitude 10 μm. The peak temperature of the elastic modulus was taken as the glass transition temperature.
樹脂組成物のガラス転移温度は以下のように測定した。実施例及び比較例それぞれに用いた樹脂被覆層と同一組成の樹脂組成物を射出成形機に供給し、100mm×100mm×厚さ2mmの平板に成形し、110℃で2時間加熱した後、その中心部から50mm×10mm×厚さ2mmの試験片を切り出した。セイコーインスツルメンツ株式会社製の粘弾性スペクトロメータDMS120を用い、変形モード曲げモード、測定周波数10Hz、昇温速度2℃/分、加振振幅10μmの条件で、試験片の損失弾性率を測定し、損失弾性率のピーク温度をガラス転移温度とした。 [Measurement of Glass Transition Temperature (Tg) of Resin Composition]
The glass transition temperature of the resin composition was measured as follows. A resin composition having the same composition as the resin coating layer used in each of the examples and comparative examples was supplied to an injection molding machine, molded into a flat plate of 100 mm × 100 mm × thickness 2 mm, heated at 110 ° C. for 2 hours, A test piece of 50 mm × 10 mm × thickness 2 mm was cut out from the center. Using a viscoelastic spectrometer DMS120 manufactured by Seiko Instruments Inc., the loss elastic modulus of the test piece was measured under the conditions of deformation mode bending mode, measurement frequency 10 Hz, heating rate 2 ° C./min, and excitation amplitude 10 μm. The peak temperature of the elastic modulus was taken as the glass transition temperature.
〔ロープ摩擦係数の測定〕
(1)微小滑り速度及び通常運転滑り速度での測定法
図2は、微小滑り速度域での摩擦係数を測定するための装置の概念図である。図2に示されるように、実施例及び比較例で得られたエレベータ用ロープ1をシーブ2に対し180度巻き付け、その一端を測定装置3に固定し、他端をおもり4に繋ぎ、エレベータ用ロープ1に張力を掛けた。ここでシーブ2を所定速度で時計回りに回転させると、エレベータ用ロープ1とシーブ2との間に生じる摩擦力だけ、固定側のロープ張力(T2)が緩められ、おもり側のロープ張力(T1)との間で張力差が発生する。これらのおもり側のロープ張力(T1)及び固定側のロープ張力(T2)を、ロープとおもりとの連結部に備え付けられたロードセルによって測定した。静止保持時の滑り速度を1×10-5mm/s、通常運転時の滑り速度を1mm/sと定義し、T1及びT2(ただしT1>T2)、ロープ巻き付け角θ(=180度)、シーブ溝の形状で決まる係数K2(=1.19)を下記式1に代入して、エレベータ用ロープ1とシーブ2との間の摩擦係数μ1を求めた。なお、測定はいずれも25℃で実施した。結果を表1に示す。 [Measurement of rope friction coefficient]
(1) Measuring Method at Minute Sliding Speed and Normal Driving Sliding Speed FIG. 2 is a conceptual diagram of an apparatus for measuring a friction coefficient in a minute sliding speed region. As shown in FIG. 2, theelevator rope 1 obtained in the example and the comparative example is wound around the sheave 2 by 180 degrees, one end is fixed to the measuring device 3, the other end is connected to the weight 4, and the elevator rope is used. Rope 1 was tensioned. Here, when the sheave 2 is rotated clockwise at a predetermined speed, the rope tension (T 2 ) on the fixed side is loosened by the friction force generated between the elevator rope 1 and the sheave 2 and the rope tension on the weight side ( A difference in tension occurs with respect to T 1 ). The rope tension (T 1 ) on the weight side and the rope tension (T 2 ) on the fixed side were measured with a load cell provided at the connection portion between the rope and the weight. The sliding speed during stationary holding is defined as 1 × 10 −5 mm / s, the sliding speed during normal operation is defined as 1 mm / s, T 1 and T 2 (where T 1 > T 2 ), rope wrap angle θ (= 180 degrees), the coefficient K 2 (= 1.19) determined by the shape of the sheave groove was substituted into the following equation 1 to obtain the friction coefficient μ 1 between the elevator rope 1 and the sheave 2. All measurements were performed at 25 ° C. The results are shown in Table 1.
(1)微小滑り速度及び通常運転滑り速度での測定法
図2は、微小滑り速度域での摩擦係数を測定するための装置の概念図である。図2に示されるように、実施例及び比較例で得られたエレベータ用ロープ1をシーブ2に対し180度巻き付け、その一端を測定装置3に固定し、他端をおもり4に繋ぎ、エレベータ用ロープ1に張力を掛けた。ここでシーブ2を所定速度で時計回りに回転させると、エレベータ用ロープ1とシーブ2との間に生じる摩擦力だけ、固定側のロープ張力(T2)が緩められ、おもり側のロープ張力(T1)との間で張力差が発生する。これらのおもり側のロープ張力(T1)及び固定側のロープ張力(T2)を、ロープとおもりとの連結部に備え付けられたロードセルによって測定した。静止保持時の滑り速度を1×10-5mm/s、通常運転時の滑り速度を1mm/sと定義し、T1及びT2(ただしT1>T2)、ロープ巻き付け角θ(=180度)、シーブ溝の形状で決まる係数K2(=1.19)を下記式1に代入して、エレベータ用ロープ1とシーブ2との間の摩擦係数μ1を求めた。なお、測定はいずれも25℃で実施した。結果を表1に示す。 [Measurement of rope friction coefficient]
(1) Measuring Method at Minute Sliding Speed and Normal Driving Sliding Speed FIG. 2 is a conceptual diagram of an apparatus for measuring a friction coefficient in a minute sliding speed region. As shown in FIG. 2, the
(2)非常停止させる際の大きな滑り速度域での測定法
図3は、非常停止させる際の大きな滑り速度域での摩擦係数を測定するための装置の概念図である。実施例及び比較例で得られたエレベータ用ロープ1を駆動シーブ5に対し180度巻き付け、その一端をおもり4aに繋ぎ、他端をおもり4aよりも質量の大きいおもり4bに繋いだ。ここで駆動シーブ5を時計周りに回転させることでおもり4aを上昇させ、ロープ速度が4m/sになった時点で駆動シーブ5を急停止させ、駆動シーブ5に対しエレベータ用ロープ1をスリップさせた。その際のおもり4aの最小減速度α、おもり4a側の張力(T3)及びおもり4b側の張力(T4)を、ロープとおもりとの連結部に備え付けられたロードセルによって測定し、それらの値を下記式2に代入して、スリップ中の最小摩擦係数μ2を求めた。なお、測定は25℃で実施した。結果を表1に示す。 (2) Measuring Method in Large Sliding Speed Range for Emergency Stop FIG. 3 is a conceptual diagram of an apparatus for measuring a friction coefficient in a large sliding speed range for emergency stopping. Theelevator rope 1 obtained in the example and the comparative example was wound around the drive sheave 5 by 180 degrees, one end thereof was connected to the weight 4a, and the other end was connected to the weight 4b having a mass larger than that of the weight 4a. Here, the weight 4a is raised by rotating the driving sheave 5 clockwise, and when the rope speed reaches 4 m / s, the driving sheave 5 is suddenly stopped, and the elevator rope 1 is slipped with respect to the driving sheave 5. It was. At that time, the minimum deceleration α of the weight 4a, the tension on the side of the weight 4a (T 3 ) and the tension on the side of the weight 4b (T 4 ) are measured by the load cell provided at the connecting portion between the rope and the weight. The value was substituted into the following formula 2 to determine the minimum friction coefficient μ 2 during slip. The measurement was performed at 25 ° C. The results are shown in Table 1.
図3は、非常停止させる際の大きな滑り速度域での摩擦係数を測定するための装置の概念図である。実施例及び比較例で得られたエレベータ用ロープ1を駆動シーブ5に対し180度巻き付け、その一端をおもり4aに繋ぎ、他端をおもり4aよりも質量の大きいおもり4bに繋いだ。ここで駆動シーブ5を時計周りに回転させることでおもり4aを上昇させ、ロープ速度が4m/sになった時点で駆動シーブ5を急停止させ、駆動シーブ5に対しエレベータ用ロープ1をスリップさせた。その際のおもり4aの最小減速度α、おもり4a側の張力(T3)及びおもり4b側の張力(T4)を、ロープとおもりとの連結部に備え付けられたロードセルによって測定し、それらの値を下記式2に代入して、スリップ中の最小摩擦係数μ2を求めた。なお、測定は25℃で実施した。結果を表1に示す。 (2) Measuring Method in Large Sliding Speed Range for Emergency Stop FIG. 3 is a conceptual diagram of an apparatus for measuring a friction coefficient in a large sliding speed range for emergency stopping. The
ここでK2は微小滑り速度域での測定法で用いた値と同じであり、gは重力(=9.80665m/s2)、θはロープ巻付け角(=180度)である。
Here, K 2 is the same as the value used in the measurement method in the minute slip velocity region, g is gravity (= 9.80665 m / s 2 ), and θ is the rope winding angle (= 180 degrees).
各測定法で測定した摩擦係数が、0.15未満のものを×、0.15以上0.2未満のものを△、0.2以上0.25未満のものを○、0.25以上0.6以下のものを◎とした。ただし、実施例及び比較例で0.6を超える摩擦係数を示したものはなかった。
The friction coefficient measured by each measurement method is x when the friction coefficient is less than 0.15, Δ when the friction coefficient is 0.15 or more and less than 0.2, ○ when the friction coefficient is 0.2 or more and less than 0.25, 0 or more and 0 .6 or less was rated as ◎. However, none of the examples and comparative examples showed a coefficient of friction exceeding 0.6.
表1の結果から分かるように、実施例及び比較例で得られたエレベータ用ロープの摩擦係数は、微小滑り速度域(1×10-5mm/s)及び非常停止時の滑り速度域において、通常運転時の速度域よりも低下する傾向を示した。しかし、実施例で得られたエレベータ用ロープは、微小滑り速度域及び非常停止時の速度域における摩擦係数がいずれも0.15以上であった。実施例1~7と比較例1~3との比較から、熱可塑性ポリウレタンエラストマーをイオン架橋させることにより摩擦係数の変動が低減できることが分かる。実施例2と実施例6及び7との比較から、イオン架橋熱可塑性ポリウレタンエラストマーに繊維状無機充填材であるガラス繊維や板状無機充填材であるタルクを添加すると、摩擦係数の変動がより低減できることが分かる。
一方、比較例で得られたエレベータ用ロープは、摩擦係数の変動が大きく、微小滑り速度域及び非常停止時の速度域における摩擦係数がいずれも0.15未満であった。 As can be seen from the results in Table 1, the friction coefficients of the elevator ropes obtained in the examples and comparative examples are as follows: in a minute slip speed range (1 × 10 −5 mm / s) and in a slip speed range at the time of emergency stop. It showed a tendency to be lower than the speed range during normal operation. However, the elevator ropes obtained in the examples both had a friction coefficient of 0.15 or more in the minute slip speed range and the speed range during emergency stop. From the comparison between Examples 1 to 7 and Comparative Examples 1 to 3, it can be seen that the variation of the friction coefficient can be reduced by ionic crosslinking of the thermoplastic polyurethane elastomer. From the comparison between Example 2 and Examples 6 and 7, when glass fiber that is a fibrous inorganic filler or talc that is a plate-like inorganic filler is added to the ion-crosslinked thermoplastic polyurethane elastomer, the variation in the coefficient of friction is further reduced. I understand that I can do it.
On the other hand, the elevator rope obtained in the comparative example had a large variation in the coefficient of friction, and both the coefficient of friction in the minute slip speed range and the speed range during emergency stop were both less than 0.15.
一方、比較例で得られたエレベータ用ロープは、摩擦係数の変動が大きく、微小滑り速度域及び非常停止時の速度域における摩擦係数がいずれも0.15未満であった。 As can be seen from the results in Table 1, the friction coefficients of the elevator ropes obtained in the examples and comparative examples are as follows: in a minute slip speed range (1 × 10 −5 mm / s) and in a slip speed range at the time of emergency stop. It showed a tendency to be lower than the speed range during normal operation. However, the elevator ropes obtained in the examples both had a friction coefficient of 0.15 or more in the minute slip speed range and the speed range during emergency stop. From the comparison between Examples 1 to 7 and Comparative Examples 1 to 3, it can be seen that the variation of the friction coefficient can be reduced by ionic crosslinking of the thermoplastic polyurethane elastomer. From the comparison between Example 2 and Examples 6 and 7, when glass fiber that is a fibrous inorganic filler or talc that is a plate-like inorganic filler is added to the ion-crosslinked thermoplastic polyurethane elastomer, the variation in the coefficient of friction is further reduced. I understand that I can do it.
On the other hand, the elevator rope obtained in the comparative example had a large variation in the coefficient of friction, and both the coefficient of friction in the minute slip speed range and the speed range during emergency stop were both less than 0.15.
1 エレベータ用ロープ、2 シーブ、3 測定装置、4,4a,4b おもり、5 駆動シーブ。
1 Elevator rope, 2 sheave, 3 measuring device, 4, 4a, 4b weight, 5 drive sheave.
Claims (7)
- ロープ本体と、前記ロープ本体の外周を覆う樹脂被覆層とを備えるエレベータ用ロープであって、
前記樹脂被覆層は、分子中にイオン性置換基を有する熱可塑性ポリウレタンエラストマーのイオン性置換基をイオン架橋させたイオン架橋熱可塑性ポリウレタンエラストマーを含む樹脂組成物の成形体からなることを特徴とするエレベータ用ロープ。 An elevator rope comprising a rope body and a resin coating layer covering the outer periphery of the rope body,
The resin coating layer is formed of a molded product of a resin composition including an ionically crosslinked thermoplastic polyurethane elastomer obtained by ionically crosslinking an ionic substituent of a thermoplastic polyurethane elastomer having an ionic substituent in a molecule. Elevator rope. - 前記イオン架橋熱可塑性ポリウレタンエラストマーは、分子中にアニオン性置換基を有する熱可塑性ポリウレタンエストマーを多価金属カチオンでイオン架橋させたものであることを特徴とする請求項1に記載のエレベータ用ロープ。 2. The elevator rope according to claim 1, wherein the ion-crosslinked thermoplastic polyurethane elastomer is obtained by ion-crosslinking a thermoplastic polyurethane elastomer having an anionic substituent in a molecule with a polyvalent metal cation. .
- 前記イオン架橋熱可塑性ポリウレタンエラストマーは、分子中にカチオン性置換基とアニオン性置換基とを有する熱可塑性ポリウレタンエストマー同士をイオン架橋させたものであることを特徴とする請求項1に記載のエレベータ用ロープ。 The elevator according to claim 1, wherein the ion-crosslinked thermoplastic polyurethane elastomer is obtained by ion-crosslinking thermoplastic polyurethane elastomers having a cationic substituent and an anionic substituent in a molecule. Rope.
- 前記樹脂組成物は、98以下のJIS A硬度及び-20℃以下のガラス転移温度を有することを特徴とする請求項1に記載のエレベータ用ロープ。 2. The elevator rope according to claim 1, wherein the resin composition has a JIS A hardness of 98 or less and a glass transition temperature of −20 ° C. or less.
- 前記樹脂組成物は、無機充填材を更に含むことを特徴とする請求項1に記載のエレベータ用ロープ。 The elevator rope according to claim 1, wherein the resin composition further includes an inorganic filler.
- 前記無機充填材が、繊維状又は板状であることを特徴とする請求項5に記載のエレベータ用ロープ。 The elevator rope according to claim 5, wherein the inorganic filler is in the form of a fiber or a plate.
- 請求項1~6のいずれか一項に記載のエレベータ用ロープを備えることを特徴とするエレベータ装置。 An elevator apparatus comprising the elevator rope according to any one of claims 1 to 6.
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WO2021241709A1 (en) * | 2020-05-28 | 2021-12-02 | 株式会社トクヤマ | Polyfunctional quaternary ammonium salt of sulfonic acid having active-hydrogen groups |
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JP2004307833A (en) * | 2003-03-26 | 2004-11-04 | Sanyo Chem Ind Ltd | Thermoplastic polyurethane elastomer |
WO2012032633A1 (en) * | 2010-09-09 | 2012-03-15 | 三菱電機株式会社 | Rope for elevator |
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JP2004307833A (en) * | 2003-03-26 | 2004-11-04 | Sanyo Chem Ind Ltd | Thermoplastic polyurethane elastomer |
WO2012032633A1 (en) * | 2010-09-09 | 2012-03-15 | 三菱電機株式会社 | Rope for elevator |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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WO2021241709A1 (en) * | 2020-05-28 | 2021-12-02 | 株式会社トクヤマ | Polyfunctional quaternary ammonium salt of sulfonic acid having active-hydrogen groups |
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