WO2016047781A1 - Courroie de transmission de puissance par friction et son procédé de fabrication - Google Patents

Courroie de transmission de puissance par friction et son procédé de fabrication Download PDF

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Publication number
WO2016047781A1
WO2016047781A1 PCT/JP2015/077191 JP2015077191W WO2016047781A1 WO 2016047781 A1 WO2016047781 A1 WO 2016047781A1 JP 2015077191 W JP2015077191 W JP 2015077191W WO 2016047781 A1 WO2016047781 A1 WO 2016047781A1
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WO
WIPO (PCT)
Prior art keywords
fiber
friction transmission
transmission belt
fibers
inorganic powder
Prior art date
Application number
PCT/JP2015/077191
Other languages
English (en)
Japanese (ja)
Inventor
学 光冨
広之 小嶋
郭代 小嶋
裕介 雀ヶ野
Original Assignee
三ツ星ベルト株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP2015180063A external-priority patent/JP6527433B2/ja
Application filed by 三ツ星ベルト株式会社 filed Critical 三ツ星ベルト株式会社
Priority to US15/513,818 priority Critical patent/US10138981B2/en
Priority to CN201580051977.9A priority patent/CN106715960B/zh
Priority to EP15844624.5A priority patent/EP3199832B1/fr
Publication of WO2016047781A1 publication Critical patent/WO2016047781A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D29/00—Producing belts or bands
    • B29D29/08—Toothed driving belts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16G—BELTS, CABLES, OR ROPES, PREDOMINANTLY USED FOR DRIVING PURPOSES; CHAINS; FITTINGS PREDOMINANTLY USED THEREFOR
    • F16G1/00—Driving-belts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16G—BELTS, CABLES, OR ROPES, PREDOMINANTLY USED FOR DRIVING PURPOSES; CHAINS; FITTINGS PREDOMINANTLY USED THEREFOR
    • F16G5/00—V-belts, i.e. belts of tapered cross-section
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16G—BELTS, CABLES, OR ROPES, PREDOMINANTLY USED FOR DRIVING PURPOSES; CHAINS; FITTINGS PREDOMINANTLY USED THEREFOR
    • F16G5/00—V-belts, i.e. belts of tapered cross-section
    • F16G5/20—V-belts, i.e. belts of tapered cross-section with a contact surface of special shape, e.g. toothed

Definitions

  • the present invention relates to a friction transmission belt (such as a V-ribbed belt) in which the friction transmission surface is covered with a fabric (such as a knitted fabric), the transmission efficiency is high, and the silence (or silence or sound resistance) is improved, and a method for manufacturing the same.
  • a friction transmission belt such as a V-ribbed belt
  • a fabric such as a knitted fabric
  • Auxiliary machines such as automobile air compressors and alternators are driven by a belt transmission device using an engine as a drive source.
  • the transmission belt of this belt transmission device is provided with an extension layer that forms the back surface of the belt, a plurality of V-shaped rib portions that are provided on one side of the extension layer, and extend in the belt circumferential direction.
  • a V-ribbed belt is used that includes a compression layer serving as a friction transmission surface, and a core wire embedded between the stretch layer and the compression layer and extending in the belt circumferential direction.
  • Such a transmission belt has a problem that abnormal noise is generated when it is wet.
  • abnormal noise is generated when it is wet.
  • the friction transmission surface power transmission surface
  • the friction transmission surface has poor wettability with water. Since water is easily repelled, the water infiltration state between the frictional transmission surface of the belt and the pulley is not uniform. And in the location where water has not entered, the friction coefficient does not decrease and the belt is in close contact with the pulley, but in the location where water has entered, the friction coefficient decreases.
  • the dry state (dry) and the wet state (wet) are mixed on the friction transmission surface and the difference between the friction coefficients is large, stick-slip noise is likely to be generated between the belt and the pulley.
  • Patent Document 1 the surface of the belt contact side (friction transmission surface) of the belt main body is integrally covered with a cloth layer, and the powder is buried inside the fiber of the cloth layer, thereby suppressing the exposure of rubber. Thus, the slip noise is suppressed for a long period of time.
  • a powder layer is formed by spraying powder onto a mold forming surface forming a pulley contact surface, and this powder layer is wound on an unvulcanized rubber composition for forming a belt (back surface).
  • Patent Document 1 does not describe specific data relating to sound production.
  • Patent Document 2 a transmission belt in which a metal soap layer is formed by applying powdered metal soap to a contact surface (friction transmission surface) with a pulley can effectively reduce abnormal noise even when wet.
  • Patent Document 2 also describes that the inner peripheral surface (friction transmission surface) of the rib rubber layer is covered with a reinforcing cloth and a metal soap.
  • a hydrophobic metal soap powder When a hydrophobic metal soap powder is applied, it is formed with a hydrophilic powder such as talc. It is described that the metal soap powder is less likely to flow out by water than the formed layer, and the metal soap powder acts as a lubricant to reduce the friction between the belt and the pulley, thereby suppressing the generation of abnormal noise during driving.
  • the reinforcement cloth of the inner peripheral surface was formed with a plain weave of polyester / cotton blended yarn, and was subjected to adhesion treatment with an RFL aqueous solution.
  • the reinforcement cloth covering the friction transmission surface was used. It is described that even if a powder such as talc, silica or calcium carbonate is applied, the powder flows out by water and abnormal noise is generated early.
  • the rib surface is covered with a canvas that includes an elastic yarn and an inelastic yarn and is stretchable in two predetermined directions.
  • V-ribbed belts are described wherein the elastic yarn comprises polyurethane and the inelastic yarn comprises a cellulose-based fiber or yarn.
  • an object of the present invention is to provide a friction transmission belt with improved silence (or sound resistance) and a method for manufacturing the same.
  • Another object of the present invention is to provide a friction transmission belt having a small variation in the friction coefficient in the friction transmission surface, a small difference in the friction coefficient between a dry state and a wet state, and a method for producing the same. Is to provide.
  • Still another object of the present invention is to provide a friction transmission belt capable of maintaining excellent sound resistance over a long period of time and a method for manufacturing the same.
  • the present inventors have coated a friction transmission surface (power transmission surface) that contacts the pulley with a fiber member containing water-absorbing fibers, and at least the surface of the fiber member.
  • a friction transmission surface power transmission surface
  • the increase in friction coefficient can be suppressed by powder in the dry state, and the decrease in friction coefficient can be suppressed by water absorption by the water-absorbing fiber in the wet state, and the difference in friction coefficient between both states can be reduced.
  • the quietness or pronunciation resistance
  • the friction transmission belt of the present invention is a friction transmission belt having a friction transmission surface, wherein the friction transmission surface is coated with a fiber member containing at least a water-absorbing fiber, and inorganic powder is formed on at least the surface of the fiber member. Existing.
  • the inorganic powder may be physically attached or held on the fiber member.
  • the friction transmission belt includes a stretch layer that forms the back surface of the belt; a compression layer provided on one side of the stretch layer; and is embedded between the stretch layer and the compression layer and extends in the belt circumferential direction. An extending core may be provided, and the friction transmission surface is preferably formed on the compression layer.
  • the friction transmission belt may be a V-ribbed belt having a plurality of V-shaped rib portions extending in the belt circumferential direction.
  • the fiber member may include a water-absorbing fiber as the first fiber and a second fiber.
  • the water-absorbing fiber may contain cellulosic fiber having high water absorption, and the cellulosic fiber may contain cotton fiber.
  • the fiber member may include at least one stretchable fiber selected from stretchable fibers that can be stretched at least in the axial direction of the fibers, for example, polyurethane fibers and crimp fibers, as the second fibers.
  • stretchable fibers (second fibers) may form a composite yarn.
  • the composite yarn may be a bulky processed yarn containing crimp fibers.
  • the composite bulky processed yarn may be a polyester composite bulky processed yarn in which polytrimethylene terephthalate (PTT) and polyethylene terephthalate (PET) are conjugated.
  • the fiber member may contain water-absorbing fibers in a proportion of about 50 to 90% by mass with respect to the entire fibers.
  • the fiber member can be formed of at least one kind of fabric selected from knitted fabric, woven fabric and non-woven fabric, or may be formed of knitted fabric.
  • the fiber member may be formed of a multilayer knitted fabric, and in the multilayer knitted fabric, the layer on the friction transmission surface side may contain more water-absorbing fibers than the layer on the side opposite to the friction transmission surface.
  • the fiber member may be a knitted fabric having a density of 60 pieces / inch or more in the wale direction, 30 pieces / inch or more in the course direction, and a total of 60 pieces / inch or more.
  • the thickness of the fiber member may be, for example, 0.3 mm or more.
  • the inorganic powder may be present at least on the surface of the fiber member, may be present between the fiber surface and / or between the fibers constituting the fiber member, and is also present between the fibers inside the tissue of the fiber member. It may be.
  • the inorganic powder preferably contains at least one selected from, for example, talc, mica, clay, and graphite.
  • the inorganic powder may be flat or cleaved.
  • the specific surface area of the inorganic powder may be about 5000 to 25000 cm 2 / g.
  • the average particle size of the inorganic powder may be about 1 to 100 ⁇ m.
  • the area ratio of the inorganic powder to the entire friction transmission surface may be about 30 to 60%.
  • the present invention also includes a method of manufacturing a friction transmission belt having a friction transmission surface.
  • a friction transmission belt can be manufactured by coating the friction transmission surface with a fiber member containing at least water-absorbing fibers and attaching inorganic powder to at least the surface of the fiber member.
  • the fiber member covering the friction transmission surface contains water-absorbing fibers and the inorganic powder is present on at least the surface of the fiber member, when drying on the friction transmission surface (power transmission surface) ( It is possible to suppress an increase in the coefficient of friction (dry), to suppress a decrease in the coefficient of friction when wet (wet), and to reduce the difference in the coefficient of friction between dry (dry) and wet (wet), and quietly. Can greatly improve or improve the performance (silence, sound resistance), and improve power transmission. Further, the wear and deterioration of the friction transmission portion can be suppressed by the fiber member covering the friction transmission surface, and the durability of the transmission belt can be enhanced. In addition, the power transmission performance from the friction transmission section (power transmission section) is not impaired despite the covering with the fiber member. Therefore, the transmission belt of the present invention can achieve silence, durability, and power transmission at a high level.
  • FIG. 1 is a schematic cross-sectional view showing an example of a V-ribbed belt of the present invention.
  • FIG. 2 is a schematic diagram for explaining a method of measuring a friction coefficient (dry state) in the embodiment.
  • FIG. 3 is a schematic diagram for explaining a method of measuring a friction coefficient (wet state) in the embodiment.
  • FIG. 4 is a schematic diagram for explaining a misalignment sound generation evaluation test of belts obtained in Examples and Comparative Examples.
  • FIG. 5 is a schematic diagram for explaining the belt running test methods obtained in the examples and comparative examples.
  • the friction transmission belt of the present invention is not particularly limited as long as it has a friction transmission surface that can come into contact with the pulley, and may be a V belt, a V-ribbed belt, a flat belt, or the like. Further, the friction transmission belt may be a belt in which a friction transmission portion (rib or the like) is formed, and a typical transmission belt is formed with a plurality of V-shaped rib portions extending in the belt circumferential length direction. It is a highly efficient V-ribbed belt.
  • such a friction transmission belt (V-ribbed belt) 1 forms a belt back surface (the outer peripheral surface of the belt) and is composed of a cover canvas (woven fabric, knitted fabric, non-woven fabric, etc.).
  • a compression layer (compression rubber layer) 2 having a friction transmission surface (surface of the friction transmission part) formed on one side (one surface side) of the stretch layer, and a friction between the compression layer (compression rubber layer) 2
  • a belt member is coated (laminated) on the transmission surface to form a belt inner peripheral surface, and the fiber member 5 that can come into contact with the pulley, and between the stretch layer 4 and the compression layer 2 along the belt longitudinal direction (circumferential length direction).
  • an embedded core body 3 is a core wire (twisted cord) arranged at a predetermined interval in the belt width direction, and is in contact with the stretch layer 4 and the compression layer 2 and is interposed between both layers.
  • a plurality of V-shaped grooves extending in the longitudinal direction of the belt are formed in the compression layer 2, and a plurality of ribs having a V-shaped section (inverted trapezoid) are formed between the grooves.
  • the surface (surface) forms a friction transmission surface. The friction transmission surface can come into contact with the pulley via the fiber member 5, and inorganic powder (inorganic particles) 6 is held on the surface and inside of the fiber member 5.
  • the present invention is preferably applied to a transmission belt in which the compression layer 2 has a friction transmission surface (or friction transmission portion) formed with a pulley.
  • the friction transmission belt of the present invention is not limited to the above structure.
  • the stretch layer 4 may be formed of a rubber composition, and the core 3 and the stretch layer 4 are interposed between the compression layer 2 and the stretch layer 4. Or in order to improve adhesiveness with the compression layer 2, you may interpose an adhesive layer.
  • the core 3 may be embedded between the stretch layer 4 and the compression layer 2.
  • the core body 3 may be embedded in the compression layer 2 or may be embedded in the compression layer 2 while being in contact with the stretch layer 4.
  • the core body 3 may be embedded in the adhesive layer, or the core body 3 may be embedded between the compression layer 2 and the adhesive layer or between the adhesive layer and the stretch layer 4.
  • the fiber (A) forming the fiber member includes at least a water-absorbing fiber (A1) as the first fiber.
  • water-absorbing fibers or fibers containing water-absorbing yarn
  • vinyl alcohol fibers polyvinyl alcohol, ethylene-vinyl alcohol copolymer fibers, vinylon, etc.
  • cellulose fibers [cellulose fibers (plants, animals or Cellulose fibers derived from bacteria, etc.), cellulose derivative fibers] and the like.
  • cellulose fibers include wood pulp (conifers, hardwood pulp, etc.), bamboo fibers, sugarcane fibers, seed hair fibers (cotton fibers (cotton linters), kapok, etc.), gin leather fibers (hemp, kouzo, mitsumata, etc.), Examples thereof include cellulose fibers (pulp fibers) derived from natural plants such as leaf fibers (manila hemp, New Zealand hemp, etc.); cellulose fibers derived from animals such as squirt cellulose; bacterial cellulose fibers; Examples of the cellulose derivative fiber include cellulose ester fiber; regenerated cellulose fiber (rayon, cupra, lyocell, etc.) and the like. Polyamide fibers (such as polyamide 6 fibers, polyamide 66 fibers, and polyamide 46 fibers) and animal-derived fibers (wool, silk, etc.) can also be used as the water-absorbing fibers.
  • cellulose fibers include wood pulp (conifers, hardwood pulp, etc.), bamboo fibers,
  • the water-absorbing fiber may be a stretchable fiber to which stretchability is imparted by Woolley processing, crimping (or crimping) processing, etc., and at least a part or all of the surface of the core material or the core yarn is absorbed in the water. It may be a composite fiber coated with a component of water-soluble fiber (a water-absorbing fiber or a resin component that forms a water-absorbing fiber).
  • the core material or core yarn may be hydrophobic or non-water-absorbing, and may be hydrophilic or water-absorbing.
  • the core material or the core yarn may be a second fiber exemplified below, for example, a non-water-absorbing fiber such as a polyolefin fiber, an acrylic fiber, a polyester fiber, or a polyurethane fiber.
  • Water absorbing fibers may be used alone or in combination of two or more.
  • a highly water-absorbing cellulosic fiber for example, at least cellulose fibers (cotton fibers, hemp, etc.) and / or regenerated cellulose fibers (rayons, etc.) may be used.
  • Cellulose fibers (particularly cotton fibers) that are natural fibers are preferred.
  • the fiber member may include a second fiber (A2) other than the water absorbent fiber in addition to the water absorbent fiber (A1) as the first fiber.
  • the second fiber (A2) may be referred to as a non-water-absorbing fiber, and this non-absorbing fiber is a fiber that absorbs less water or absorbs less water than the water-absorbing fiber (A1). May be.
  • the second fiber or non-water-absorbing fiber (A2) examples include polyolefin fibers (polyethylene fiber, polypropylene fiber, etc.), non-water-absorbing polyamide fibers (such as aromatic polyamide fibers such as aramid fiber), acrylic fibers, and polyester fibers.
  • polyolefin fibers polyethylene fiber, polypropylene fiber, etc.
  • non-water-absorbing polyamide fibers such as aromatic polyamide fibers such as aramid fiber
  • acrylic fibers such as acrylic fibers, and polyester fibers.
  • C 2-4 alkylene C 6-14 such as polyethylene terephthalate (PET) fiber, polypropylene terephthalate (PPT) fiber, polytrimethylene terephthalate (PTT) fiber, polybutylene terephthalate (PBT) fiber, polyethylene naphthalate (PEN) fiber, etc.
  • Examples thereof include synthetic fibers such as arylate fibers and polyarylate fibers], polyparaphenylenebenzobisoxazole (PBO) fibers and polyurethane fibers; and inorganic fibers such as carbon fibers.
  • the second fibers may be used alone or in combination of two or more.
  • the ratio of the water-absorbing fiber (A1) to the entire fiber (A) of the fiber member can be selected from the range of about 10 to 95% by mass (for example, 30 to 90% by mass), for example, 50 to 90% by mass ( For example, it may be about 60 to 90% by mass), preferably about 70 to 90% by mass (for example, 75 to 85% by mass).
  • the proportion of the water absorbent fibers decreases, the water absorbability of the fiber member decreases.
  • the second fiber (A2) may include at least a stretchable fiber that can stretch in the axial direction of the fiber.
  • the elastic fiber (or elastic yarn) may be an elastic fiber or yarn formed of an elastomer (such as polyurethane fiber (or polyurethane elastic yarn or spandex)), and may be elastic (for example, Woolley processing, crimp (or Crimp fibers (or yarns) imparted with stretchability by crimping or the like may be used.
  • Stretchable fibers such as polyurethane fibers may be crimped to form crimp fibers.
  • the preferred second fibers may include at least one stretchable fiber selected from polyurethane fibers and crimp fibers.
  • the crimp fiber means a fiber having bulkiness and stretchability by crimping.
  • the ratio of the stretchable fiber to the whole non-water absorbent fiber is, for example, 5 to 100% by mass (for example, 10 to 90% by mass), preferably 15 to 85% by mass (for example, 20 to 80% by mass), and more preferably It may be about 25 to 75% by mass (for example, 30 to 70% by mass).
  • Fibers may be usually contained in the fiber member in the form of yarns such as monofilament yarns and multifilament yarns.
  • the multifilament yarn may be a non-twisted yarn or a twisted yarn.
  • the twisted yarn may be a yarn (for example, various twisted yarns, piece twisted yarns, rung twisted yarns, and the like) obtained by twisting a plurality of piece-twisted yarns as a lower twisted yarn. , Wall twisted yarn, etc.).
  • the multifilament yarn may be a composite yarn (or composite fiber) formed of a plurality of fibers (or yarns).
  • the composite yarn (twisted yarn) may be a covering yarn [a yarn (twisted yarn) including a core yarn and a sheath yarn wound around the core yarn (covered)].
  • the multifilament yarn (or twisted yarn) is a water-absorbing fiber (water-absorbing fiber yarn, monofilament of water-absorbing fiber) or non-water-absorbing fiber [or non-water-absorbing fiber yarn such as the non-water-absorbing fiber (for example, polyurethane fiber). Or the like, and may include both water-absorbing fibers and non-water-absorbing fibers.
  • examples of the composite yarn containing a water-absorbing fiber include a composite yarn comprising a plurality of water-absorbing fibers, a composite yarn comprising water-absorbing fibers and non-water-absorbing fibers, and a covering yarn containing water-absorbing fibers.
  • composite yarns containing the stretchable fibers are preferable from the viewpoint of stretchability.
  • the covering yarn including the water-absorbing fiber may include a water-absorbing fiber or a water-absorbing fiber yarn (crimped water-absorbing fiber or yarn) in which both the core yarn and the sheath yarn have elasticity
  • the sheath yarn may contain water-absorbing fibers (such as cotton fibers)
  • the core yarn may contain stretchable non-water-absorbing fibers (for example, stretchable fibers such as polyurethane fibers).
  • the covering yarn containing water-absorbing fibers is often composed of non-water-absorbing fibers for the core yarn and water-absorbing fibers for the sheath yarn.
  • polyurethane fibers are covered with cellulose fibers. Examples of such composite yarns can be given.
  • the non-water-absorbing fiber composite yarn is, for example, a composite yarn in which a plurality of polyester fibers (for example, PET fiber and PTT fiber) are conjugated, and a covering yarn in which both the core yarn and the sheath yarn are composed of non-water-absorbing fibers.
  • one of the core yarn and the sheath yarn is made of a stretchable fiber, for example, the core yarn is made of a stretchable fiber such as polyurethane fiber (PU fiber), and the sheath yarn is made of polyester fiber (PET A covering yarn or a composite yarn formed with a fiber etc.].
  • a bulky processed yarn having a large cross section for example, a plurality of Conjugated yarn (compound yarn of crimp fiber) including fibers, covering yarn obtained by covering the core yarn with the first or second fiber, crimped yarn (crimped first and / or crimped yarn) It is advantageous to use a second fiber yarn), Woolley yarn, Taslan yarn, interlace yarn and the like. In particular, a conjugate yarn and a covering yarn are preferable.
  • the conjugate yarn has a cross-sectional structure in which a plurality of polymers are phase-separated and bonded in the fiber axis direction, and heat treatment makes use of the difference in thermal shrinkage of the polymer to cause crimping by heat treatment.
  • It is a bulky processed yarn.
  • the covering yarn is a bulky processed yarn in which the bulk of the entire yarn is increased in volume by covering (covering) another yarn around the surface of the core yarn.
  • Typical bulky processed yarns include polyester composite yarns, for example, composite yarns conjugated with PTT and PET (PTT / PET conjugated yarns), composite yarns conjugated with PBT and PET (PBT / PET conjugates).
  • Conjugate yarn such as yarn
  • Polyurethane (PU) yarn PU elastic yarn
  • a composite yarn PET / PU covering yarn
  • PET fiber polyester fiber
  • PU yarn PU yarn
  • the covering yarn include a composite yarn (PA / PU covering yarn) in which polyamide (PA) is covered as a yarn.
  • PA polyamide
  • PTT / PET conjugate yarns or PET / PU covering yarns that are excellent in stretchability and abrasion resistance are preferred.
  • Such a bulky processed yarn makes the fiber member bulky and the fiber has elasticity. For this reason, when the bulky processed yarn is used, it is possible to prevent the rubber of the belt body from exuding to the friction transmission surface (or the surface of the fiber member) due to the bulkiness, and the friction coefficient increase in the dry state on the friction transmission surface and the wet state It is possible to prevent the friction coefficient from being lowered. Moreover, increasing the water-absorbing cellulosic fiber (or spun yarn) content increases the water absorption capacity from the friction transmission surface, prevents a decrease in the friction coefficient of the friction transmission surface in the wet state, and the dry and wet states. The difference in coefficient of friction can be made sufficiently small.
  • the fineness of the yarn depends on the form of the fiber member, but may be, for example, about 20 to 600 dtex, preferably about 50 to 300 dtex.
  • the fiber member only needs to be in a form capable of covering the friction transmission surface of the transmission belt, and can be usually formed of at least one kind of fabric (or canvas) selected from knitted fabric, woven fabric, non-woven fabric, and the like. Of these fabrics, it is preferable to form the fiber member with a knitted fabric.
  • the knitted fabric is excellent in stretchability and is suitable for laminating the fiber member along the contour (rib shape, etc.) of the friction transmission surface.
  • the knitted fabric is formed by making a loop without crossing yarns in a straight line. That is, a knitted fabric (structure) in which one or two or more knitting yarns form a stitch (loop), and the next yarn is hooked on the loop to continuously form a new loop.
  • a knitted fabric structure in which one or two or more knitting yarns form a stitch (loop), and the next yarn is hooked on the loop to continuously form a new loop.
  • a fiber member can be formed that covers and joins the friction transmission surface with vulcanization molding.
  • the knitted fabric may be either weft knitted (or knitted fabric knitted by weft knitting) or warp knitted (or knitted fabric knitted by warp knitting).
  • a preferred knitted fabric is a weft knitted fabric (or a knitted fabric knitted by a weft knitted fabric).
  • the knitted fabric may be a single layer knitted fabric knitted into a single layer or a multilayer knitted fabric knitted into multiple layers.
  • the single layer weft includes flat knitting (Tengu knitting), rubber knitting, tack knitting, pearl knitting, etc.
  • single-layer warp knitting of warp knitting includes single denby, single cord, etc.
  • multi-layer warp knitting includes half tricot, double denby, double atlas, double cord. And double tricots. These knitted fabrics may be used alone or in combination of two or more to form a fiber member.
  • a single layer weft knitting for example, a weft knitting with a flat knitting (tengu knitting)
  • a multi-layer knitting for example, Kanoko knitting (Kanoko knitting is a knitting organization). Weft knitting) and the like are preferred, and multilayer knitted fabrics are particularly preferred.
  • a bulky layer of the fiber member can be formed on the friction transmission surface, and the rubber composition forming the compression layer oozes out on the surface side of the fiber member (surface side of the friction transmission surface). Can be suppressed.
  • Examples of means for forming a bulky layer of fiber members on the friction transmission surface include a method of increasing the number of layers of the knitted fabric and a method of increasing the bulk of the bulky processed yarn.
  • the number of layers of the knitted fabric may be 2 to 5 layers, preferably about 2 to 3 layers.
  • the layer on the friction transmission surface (or the surface of the fiber member) has more water-absorbing fibers (cellulosic natural spun yarn, etc.) than the layer on the opposite side to the friction transmission surface. By containing the water absorbency on the friction transmission surface can be further improved.
  • the fiber member preferably has an opening or a structure that allows the inorganic powder to enter and hold the inorganic powder in order to effectively hold the inorganic powder.
  • the density of fibers or yarns in the fiber member is, for example, 30 / inch or more (for example, 32 to 60 / inch, preferably 34 to 55) in the wale direction and the course direction, respectively. / Inch, more preferably 35 to 50 / inch).
  • the total may be 60 lines / inch or more (for example, 62 to 120 lines / inch, preferably 65 to 110 lines / inch, more preferably 70 to 100 lines / inch).
  • a fiber member (knitted fabric or the like) having a predetermined fiber or yarn density does not have an excessive opening (or stitch), and the inorganic powder easily enters the fiber member and is held.
  • the total density of the fiber member is too small, the contact efficiency between the inorganic powder and the fiber is lowered, and the inorganic powder is likely to fall off.
  • the bulkiness of the fiber member can be selected within a range in which rubber exudation can be suppressed.
  • 2 cm 3 / g or more for example, 2.2 To 4.5 cm 3 / g
  • preferably about 2.4 cm 3 / g or more for example, 2.5 to 4 cm 3 / g
  • the upper limit of the bulk is not particularly limited, for example, 4.0 cm 3 / g or less (e.g., 2.3 ⁇ 3.8cm 3 / g) , or 3.5 cm 3 / g or less (e.g., 2.5 To 3.3 cm 3 / g).
  • the bulkiness (cm 3 / g) can be calculated by dividing the thickness (cm) of the knitted fabric by the mass (g / cm 2 ) per unit area.
  • the adhesion treatment in order to improve the adhesiveness with respect to a friction transmission surface, you may perform an adhesion
  • the adhesion treatment include immersion treatment in a resin-based treatment solution in which an adhesive component [eg, epoxy compound, isocyanate compound] is dissolved in an organic solvent (toluene, xylene, methyl ethyl ketone, etc.), resorcin-formalin-latex solution
  • adhesive treatments include, for example, a friction treatment in which a fiber member and a rubber composition are passed through a calender roll and the rubber composition is imprinted on the fiber member, a spreading treatment in which a rubber paste is applied to the fiber member, and a rubber composition on the fiber member. It is also possible to employ a coating process for laminating layers.
  • the basis weight of the fiber member may be, for example, about 50 to 500 g / m 2 , preferably about 80 to 400 g / m 2 , and more preferably about 100 to 350 g / m 2 .
  • the thickness (average thickness) of the fiber member can be selected from a range of about 0.1 to 5 mm as long as rubber exudation can be suppressed, and is, for example, 0.3 mm or more (for example, 0.4 to 3 mm), preferably 0. It may be about 5 to 2 mm, more preferably about 0.7 to 1.5 mm.
  • the thickness of the fiber member increases, the bulk of the fiber member increases and the amount of inorganic powder that can be held inside the fiber member can be increased.
  • the fiber member may contain a surfactant if necessary.
  • Inorganic powder is present on at least the surface of the fiber member, and the inorganic powder is interposed between the pulley and the fiber member (or the compression layer) in the running state.
  • the inorganic powder is present in a state of adhering or invading between the fiber surface constituting the fiber member and between the fibers (between the filaments).
  • the inorganic powder is also present between the fibers inside the tissue of the fiber member. Invaded. That is, the inorganic powder does not need to be integrated with the rubber along with the vulcanization of the unvulcanized rubber, and is physically held by the fiber member.
  • the inorganic powder acts as a lubricant in the dry state and further suppresses an increase in the friction coefficient in the dry state. Further, in the wet state, the decrease in the friction coefficient is suppressed because the inorganic powder is locked or adhered to the traveling surface of the pulley. Therefore, the presence of the inorganic powder on the friction transmission surface (or the surface of the fiber member) can suppress variations in the friction coefficient over the entire friction transmission surface. In addition, when the inorganic powder enters and is held inside the fiber member, the inorganic powder is exposed to the surface even if the fiber member is worn, and sound resistance can be maintained for a long time.
  • the kind of the inorganic powder is not particularly limited and may be silica, calcium carbonate or the like, but it seems that an inorganic powder having a flat shape or a cleavage property is preferable.
  • examples of such inorganic powders include talc, mica, clay, and graphite. These inorganic powders can be used alone or in combination of two or more.
  • a preferred inorganic powder is talc whose main component is hydrous magnesium silicate.
  • talc can be obtained by mechanically crushing, processing, and classifying a rough stone called talc.
  • Talc may contain impurities (iron oxide, aluminum oxide, magnesium carbonate, etc.), and the content of impurities may be 10 wt% or less (for example, 3 to 10 wt%).
  • the specific surface area of the inorganic powder may be, for example, about 5000 to 25000 cm 2 / g, preferably about 6000 to 23000 cm 2 / g, and more preferably about 7000 to 20000 cm 2 / g.
  • the apparent density may be, for example, about 0.25 to 0.90 g / ml, preferably about 0.30 to 0.85 g / ml, and the oil absorption is 40 ml / 100 g or less, preferably 38 ml / 100 g. It may be the following. If the specific surface area of the inorganic powder is too small, it is difficult to enter between the stitches of the fiber member (knitted fabric or the like) or between the fibers, and the amount of the powder supported may be reduced.
  • the specific surface area of the inorganic powder is too large, the inorganic powder is likely to be scattered in the process of attaching the inorganic powder, which may reduce the coating efficiency and workability of the powder.
  • the specific surface area can be measured by a nitrogen adsorption method based on the BET method.
  • the average particle size of the inorganic powder can be selected from the range of, for example, about 1 to 100 ⁇ m (for example, 5 to 75 ⁇ m), and is usually 10 to 80 ⁇ m (for example, 10 to 70 ⁇ m), preferably 15 to 60 ⁇ m (for example, 20 to 50 ⁇ m). If the average particle size is too small, the powder application efficiency and workability may be reduced. On the other hand, if the average particle size is too large, the amount of powder supported may be reduced. In the present invention, the average particle diameter can be measured using a laser diffraction / scattering particle size distribution measuring apparatus.
  • the area ratio of the inorganic powder on the friction transmission surface may be 10% or more with respect to the entire friction transmission surface, for example, 10 to 90% (for example, 30 to 60%), preferably 30. It is about -80% (for example, 40-75%), more preferably about 50-70% (especially 55-65%). If the proportion of the inorganic powder is too small, the friction coefficient with respect to the pulley may be greatly varied.
  • the area ratio of the inorganic powder can be measured by a computer image processing method using a computer (smart camera) having an image processing function, and details will be described later. It can be measured by the method described in the examples.
  • the adhesion amount of the inorganic powder is not particularly limited as long as sound resistance can be suppressed, and is 0.01 to 30 parts by weight (for example, 0.05 to 27 parts by weight) with respect to 100 parts by weight of the fiber member.
  • the amount may preferably be about 0.1 to 25 parts by weight (for example, 0.5 to 22 parts by weight), more preferably about 1 to 20 parts by weight (for example, 2 to 15 parts by weight).
  • the compression layer can usually be formed of rubber (or a rubber composition).
  • rubber rubber constituting the rubber composition
  • known rubber components and / or elastomers such as diene rubber (natural rubber, isoprene rubber, butadiene rubber, chloroprene rubber, styrene butadiene rubber (SBR), acrylonitrile butadiene rubber) (Nitrile rubber), hydrogenated nitrile rubber (including mixed polymers of hydrogenated nitrile rubber and unsaturated carboxylic acid metal salt), ethylene- ⁇ -olefin elastomer, chlorosulfonated polyethylene rubber, alkylated chlorosulfonated polyethylene Examples thereof include rubber, epichlorohydrin rubber, acrylic rubber, silicone rubber, urethane rubber, and fluorine rubber.
  • ethylene- ⁇ -olefin elastomers ethylene-propylene rubber (EPR), ethylene-propylene rubber (EPR), free from harmful halogens, ozone-resistant, heat-resistant, cold-resistant, and economically superior
  • Ethylene- ⁇ -olefin rubbers such as ethylene-propylene-diene rubbers (EPDM, etc.) are preferred.
  • the ratio of rubber to the entire compression layer is, for example, 20% by mass or more (eg, 25 to 80% by mass), preferably 30% by mass or more (eg, 35 to 75% by mass), and more preferably May be 40 mass% or more (for example, 45 to 70 mass%).
  • the compressed layer may contain various additives as necessary.
  • Additives include known additives such as vulcanizing agents or crosslinking agents [for example, oximes (such as quinonedioxime), guanidines (such as diphenylguanidine), and organic peroxides (diacyl peroxide).
  • vulcanization aids such as carbon black and hydrous silica
  • metal oxides eg oxidation Zinc, magnesium oxide, calcium oxide, barium oxide, iron oxide, copper oxide, titanium oxide, aluminum oxide, etc.
  • filler clay, calcium carbonate, talc, mica, etc.
  • plasticizer softener (paraffin oil, naphthenic) Oils, etc.)
  • processing agents or processing aids stearic acid, metal stearate, wax, para ),
  • Anti-aging agents aromatic amine-based anti-aging agents, benzimidazole-based anti-aging agents, etc.
  • adhesion improvers [resorcin-formaldehyde co-condensates, melamine resins such as hexamethoxymethyl melamine, Condensates (resorcinol-melamine-form
  • the proportion of the additive can also be appropriately selected according to the type of rubber.
  • the proportion of the reinforcing agent carbon black or the like
  • the proportion of the reinforcing agent is 10 parts by mass or more (for example, 20 to 150 parts by mass), preferably 20 parts by mass or more (for example, 25 to 120 parts by mass) with respect to 100 parts by mass of rubber. More preferably, it may be 30 parts by mass or more (for example, 35 to 100 parts by mass) or 40 parts by mass or more (for example, 50 to 80 parts by mass).
  • Compressed layer may contain short fibers.
  • the short fibers include short fibers of the fibers exemplified in the above-mentioned fiber (A) [for example, cellulose fibers such as cotton and rayon, polyester fibers (PET fibers, etc.), polyamide fibers (aliphatic polyamides such as polyamide 6). Fiber, aramid fiber, etc.).
  • the short fiber may be a water absorbent fiber.
  • the short fibers may be used alone or in combination of two or more.
  • the average fiber length of the short fibers may be, for example, about 0.1 to 30 mm (for example, 0.2 to 20 mm), preferably about 0.3 to 15 mm, and more preferably about 0.5 to 5 mm.
  • These short fibers may be surface-treated with a surfactant, a silane coupling agent, an epoxy compound, an isocyanate compound, or the like, if necessary.
  • the proportion of short fibers is, for example, about 0.5 to 50 parts by mass (for example, 1 to 40 parts by mass), preferably about 3 to 30 parts by mass (for example, 5 to 25 parts by mass) with respect to 100 parts by mass of rubber. It may be.
  • the thickness of the compression layer can be appropriately selected depending on the type of belt, and may be, for example, 1 to 30 mm, preferably 1.5 to 25 mm, and more preferably about 2 to 20 mm.
  • the core wire (twisted cord) arranged at predetermined intervals in the belt width direction can be used.
  • the core wire is not particularly limited, and may include, for example, synthetic fibers such as polyester fibers (polyalkylene arylate fibers) and polyamide fibers (such as aramid fibers), inorganic fibers such as carbon fibers, and the like.
  • the core wire usually a twisted cord using multifilament yarn (for example, various twists, single twists, rung twists, etc.) can be used.
  • the average wire diameter (fiber diameter of the twisted cord) of the core wire may be, for example, about 0.5 to 3 mm, preferably about 0.6 to 2 mm, and more preferably about 0.7 to 1.5 mm.
  • the core wire may be embedded in the longitudinal direction of the belt, or may be embedded in parallel at a predetermined pitch parallel to the longitudinal direction of the belt.
  • the core wire may be subjected to various adhesion treatments with an epoxy compound, an isocyanate compound, etc., as with the short fiber.
  • the stretch layer may be formed of the same rubber composition as the compression layer, or may be formed of a fabric (reinforcing fabric) such as a canvas.
  • a fabric such as a canvas.
  • the cloth include cloth materials such as woven cloth, wide-angle sail cloth, knitted cloth, and non-woven cloth. Of these, preferred are woven fabrics woven in the form of plain weave, twill weave, satin weave, etc., wide-angle canvas or knitted fabric in which the crossing angle between warp and weft is about 90 to 120 °.
  • the fibers constituting the reinforcing cloth the fibers exemplified in the section of the fiber member (water-absorbing fibers, non-water-absorbing fibers, etc.) can be used.
  • the reinforcing cloth may be subjected to an adhesion treatment (for example, an adhesion treatment exemplified in the section of the fiber member). Further, after the adhesion treatment [treatment with the RFL solution (immersion treatment etc.)], the rubber composition may be formed by friction or rubbing (coating) the rubber composition.
  • an adhesion treatment for example, an adhesion treatment exemplified in the section of the fiber member.
  • the stretch layer may be formed of rubber (rubber composition).
  • the rubber composition may further contain short fibers similar to those in the compression layer in order to suppress abnormal noise generated due to adhesion of the back rubber during back drive.
  • the short fibers may be randomly oriented in the rubber composition. Further, the short fiber may be a short fiber partially bent.
  • an uneven pattern may be provided on the surface of the stretch layer (back surface of the belt) in order to suppress abnormal noise when driving the back surface.
  • the uneven pattern include a knitted fabric pattern, a woven fabric pattern, a suede woven fabric pattern, and an embossed pattern. Of these patterns, a woven fabric pattern and an embossed pattern are preferable. Furthermore, you may coat
  • the thickness of the stretched layer can be appropriately selected depending on the type of belt, but may be, for example, about 0.5 to 10 mm, preferably 0.7 to 8 mm, and more preferably about 1 to 5 mm.
  • the adhesive layer (adhesive layer) As described above, the adhesive layer is not always necessary.
  • the adhesive layer (adhesive rubber layer) can be composed of, for example, the same rubber composition as the compression layer (compressed rubber layer) (rubber composition containing a rubber component such as ethylene- ⁇ -olefin elastomer).
  • the rubber composition of the adhesive layer may further contain an adhesion improver (resorcin-formaldehyde cocondensate, amino resin, etc.).
  • the thickness of the adhesive layer can be appropriately selected according to the type of belt, but may be, for example, about 0.2 to 5 mm, preferably about 0.3 to 3 mm, and more preferably about 0.5 to 2 mm.
  • the rubber component is often the same or the same type of rubber as the rubber component of the rubber composition of the compression rubber layer.
  • the proportion of additives such as a vulcanizing agent or a crosslinking agent, a co-crosslinking agent or a crosslinking aid, and a vulcanization accelerator is from the same range as the rubber composition of the compression layer, respectively. You can choose.
  • the step of coating the friction transmission surface (compressed rubber layer) with a fiber member containing at least water-absorbing fibers, and the step of attaching or holding inorganic powder on at least the surface of the fiber member (physically attached) Or a holding step), a friction transmission belt on which a friction transmission surface with the pulley (or the surface of the fiber member) is formed can be manufactured.
  • the coating step can be performed by a known or conventional method, and is obtained, for example, by laminating a fiber member, a compression layer composed of rubber (or a rubber composition), a core body, and an extension layer.
  • the laminated body is molded into a cylindrical shape with a molding die, vulcanized to form a sleeve, and the vulcanized sleeve is cut to a predetermined width so that the fiber member covers the friction transmission surface (compressed rubber layer).
  • a belt can be produced.
  • the spare V-ribbed belt can be manufactured, for example, by the following method.
  • Second manufacturing method First, using a cylindrical inner mold having a flexible jacket on the outer peripheral surface, an unvulcanized stretch layer sheet is wound around the flexible jacket on the outer peripheral surface, and a core is formed on the sheet (Twisted cord) is spun into a spiral shape, and an unvulcanized compression layer sheet and a fiber member are wound to produce a laminate.
  • an outer mold that can be attached to the inner mold a cylindrical outer mold in which a plurality of rib molds are engraved on the inner peripheral surface is used, and an inner mold in which the laminate is wound is provided in the outer mold. Install concentrically.
  • the flexible jacket is expanded toward the inner peripheral surface (rib type) of the outer mold, and the laminate (compressed layer) is pressed into the rib mold and vulcanized.
  • the sleeve-shaped preliminary V-ribbed belt can be manufactured by extracting the inner mold from the outer mold and removing the vulcanized rubber sleeve having a plurality of ribs from the outer mold.
  • the sleeve-shaped spare V-ribbed belt may be prepared by cutting the vulcanized rubber sleeve to a predetermined width in the longitudinal direction of the belt using a cutter.
  • a laminated body including a stretch layer, a core body, and a compression layer can be expanded at a time to be finished into a sleeve having a plurality of ribs (or a V-ribbed belt).
  • the inorganic powder is adhered or held on the fiber member of the spare belt thus produced.
  • This step is not particularly limited as long as the inorganic powder can adhere to the fiber member, and the inorganic powder may be sprayed or sprayed on the fiber member, or the inorganic powder may be rubbed into the surface of the fiber member.
  • the inorganic powder on the surface of the fiber member may be pressed with a brush capable of moving back and forth in the thickness direction, and the inorganic powder may be held in the fiber member.
  • the fiber member surface of a sleeve-shaped spare belt or a plurality of spare belts having a predetermined width (sometimes simply referred to as spare belts) And spread it between predetermined axes, and spray the inorganic powder from the spray port of the powder spreader on the traveling fiber member surface (for example, drop it uniformly and spray it). Then, the inorganic powder may be adhered by pressing the dispersed inorganic powder with a brush (for example, the tip of a brush brush). Moreover, in the press with a brush, you may press, spraying the dispersed inorganic powder.
  • a brush for example, the tip of a brush brush
  • belt shaft means that can run over the belt across the shaft can be used.
  • the shaft mounting means includes, for example, at least three axes of a drive shaft, a driven shaft, and an extension shaft, and the fiber member can travel in a substantially horizontal direction between the first and second shafts (for example, 0. It is possible to travel at a belt peripheral speed of 3 to 1.5 m / sec.) And to form a spraying area where inorganic powder can be sprayed.
  • the third shaft is usually disposed below the first and second shafts.
  • Inorganic powder is sprayed in the spraying area from the spraying port of the powder spraying machine.
  • the powder spreader is provided with a plurality of rotating brushes extending in the radial direction, and the inorganic powder from the spray port can be evenly or evenly spread with a predetermined width.
  • the inorganic powder can be uniformly dispersed in a low density dispersion state, and dispersion at the peripheral belt circumferential direction can be reduced by running at a constant speed.
  • the application amount of the inorganic powder may be about 5 to 200 g / m 2 , preferably about 25 to 170 g / m 2 (eg, 50 to 150 g / m 2 ), and more preferably about 70 to 130 g / m 2 .
  • the inorganic powder dispersed in this way is pushed into or invaded into the fiber member by a brush (brush tip) that can move forward and backward or press against the running belt surface (for example, the rib surface of the running belt). be able to.
  • a brush brush tip
  • Such powdering means capable of moving the brush tip forward and backward in the fiber member is installed at a plurality of locations (for example, 2 to 5 locations) in the running direction of the spare belt, and the infiltration efficiency of the inorganic powder into the fiber member. In addition, the holding efficiency may be increased.
  • the present invention will be described in more detail based on examples, but the present invention is not limited to these examples.
  • the measuring method of the adhesion amount of surfactant, the measuring method or evaluation method of each physical property, etc. are shown below.
  • Rubber composition The rubber composition shown in Table 1 was kneaded with a Banbury mixer, and the kneaded rubber was passed through a calender roll to prepare an unvulcanized rolled rubber sheet (sheet for compression layer) having a predetermined thickness. Further, using the rubber composition A shown in Table 1, an adhesive layer sheet and an extension layer sheet were produced in the same manner as described above.
  • the component of Table 1 is as follows.
  • EPDM “Nodel IP4640” manufactured by Dow Chemical Zinc oxide: manufactured by Shodo Chemical Industry Co., Ltd., "Zinc oxide 3 types” Carbon black: “Seast V” manufactured by Tokai Carbon Co., Ltd., average particle size 55 nm
  • Softener Paraffinic oil, manufactured by Idemitsu Kosan Co., Ltd., “NS-90” Anti-aging agent: “NOCRACK MB” manufactured by Ouchi Shinsei Chemical Industry Co., Ltd.
  • Organic peroxide “Park Mill D-40” manufactured by NOF Corporation Co-crosslinking agent: “Barunok PM” manufactured by Ouchi Shinsei Chemical Industry Co., Ltd.
  • Cotton short fiber Denim, average fiber diameter 13 ⁇ m, average fiber length 3mm
  • Examples 1 to 3 Cotton spun yarn (40 count, one) as a water-absorbing fiber and PTT / PET conjugate composite yarn (fineness 84 dtex) as the second fiber are knitted, and the knitting structure is a weft knitting (Kanoko, two layers) A knitted fabric (fiber member) was prepared. In each example, knitted fabrics having different thicknesses and knitted fabric densities were used as the fiber members.
  • the core wire is dipped in a resorcin-formalin-latex solution (RFL solution) in advance, and then coated with a treatment solution in which a rubber composition containing EPDM is dissolved in an organic solvent (toluene) Processed.
  • RTL solution resorcin-formalin-latex solution
  • the inner mold around which the cylindrical laminate is wound is placed concentrically in a cylindrical outer mold in which a plurality of rib molds are engraved on the inner peripheral surface, and the flexible jacket is expanded to obtain the laminate. It was pressed into a rib mold and vulcanized. Then, the inner mold is extracted from the outer mold, the vulcanized rubber sleeve having a plurality of ribs is removed from the outer mold, and the vulcanized rubber sleeve is cut to a predetermined width in the longitudinal direction of the belt by using a cutter. A ribbed belt (6 ribs, circumferential length 1200 mm) was produced.
  • Examples 4-5 A V-ribbed belt was produced in the same manner as in Example 3 except that the amount of the inorganic powder sprayed on the surface of the fiber member was changed to 130 g / m 2 or 150 g / m 2 .
  • Example 6 V-ribbed belt in the same manner as in Example 3 except that talc (hydrous magnesium silicate, flat, apparent density 0.7 to 0.8 g / ml, average particle size 30 to 50 ⁇ m, specific surface area 10,000 cm 2 / g) was used. Was made.
  • talc hydrous magnesium silicate, flat, apparent density 0.7 to 0.8 g / ml, average particle size 30 to 50 ⁇ m, specific surface area 10,000 cm 2 / g
  • Example 7 Example 7 except that the core yarn of polyurethane resin is knitted with yarn covered with cotton (water-absorbing fiber), and a knitted fabric having a weft knitting (twill, single layer) is prepared and used as a fiber member.
  • a V-ribbed belt was prepared.
  • knitted fabrics having different thicknesses and knitted fabric densities were used as the fiber members.
  • Comparative Example 1 A V-ribbed belt was prepared in the same manner as in Example 7 without attaching or holding talc to the fiber member.
  • Comparative Example 2 Without covering with a knitted fabric, talc was adhered to the frictional transmission surface of the rubber where the short fibers were exposed.
  • the rubber composition “B” was used as the compression layer rubber composition.
  • the average thickness of the knitted fabric conforms to JIS L 1096 (2010), remove the unnatural wrinkles and tension, place the knitted fabric on a flat table, and measure the thickness at five locations with a constant load type thickness gauge. Then, an average value was calculated to obtain an average thickness.
  • the density of the knitted fabric conforms to JIS L 1096 (2010).
  • the knitted fabric is placed on a flat table except for unnatural wrinkles and tension, and the number of stitches in a length of 1 inch is arbitrarily set at five locations. Measurements were made and the average was calculated as the average density.
  • the area ratio of the inorganic powder is the distance to the friction transmission surface using a smart camera (OMRON Co., Ltd., model number: FQ2-S4005F-M, monochrome CMOS type, processing resolution: 752 ⁇ 480).
  • a smart camera OMRON Co., Ltd., model number: FQ2-S4005F-M, monochrome CMOS type, processing resolution: 752 ⁇ 480.
  • the driving coefficient (Dr.) with a diameter of 121.6 mm, an idler pulley (IDL.1) with a diameter of 76.2 mm, and a diameter of 61.0 mm are used to measure the friction coefficient during normal running (dry).
  • Idler pulley (IDL.2), idler pulley (IDL.3) having a diameter of 76.2 mm, idler pulley (IDL.4) having a diameter of 77.0 mm, and driven pulley (Dn.) Having a diameter of 121.6 mm were sequentially arranged. A testing machine was used.
  • a V-ribbed belt is hung on each pulley of the test machine, and the rotational speed of the driving pulley is 400 rpm and the belt winding angle around the driven pulley is 20 ° under a room temperature (25 ° C.) condition, and a constant load [180 N / 6 Rib (Rib)] is applied and the belt is run to increase the torque of the driven pulley from 0 to a maximum of 20 Nm, and the torque of the driven pulley when the belt slip speed with respect to the driven pulley reaches the maximum (100% slip). From the value, the friction coefficient ⁇ was determined using the following equation.
  • T1 T2 + Dn.
  • T2 180 (N / 6 Rib)
  • ⁇ ⁇ / 9 (rad) (where rad means radians)
  • the friction coefficient ⁇ was similarly determined using the above equation using the same testing machine.
  • the misalignment sound generation evaluation test (sound generation limit angle) includes a 101 mm diameter drive pulley (Dr.) and an 80 mm diameter idler pulley (IDL.1). , A misalignment pulley with a diameter of 128 mm (W / P), an idler pulley with a diameter of 80 mm (IDL.2), a tension pulley with a diameter of 61 mm (Ten.), And an idler pulley with a diameter of 80 mm (IDL.3) It was performed using.
  • the axial separation (span length) of the idler pulley (IDL.1) and the misalignment pulley was set to 135 mm, and all the pulleys were adjusted to be positioned on the same plane (misalignment angle 0 °).
  • a V-ribbed belt is hung on each pulley of the testing machine, and tension is applied so that the rotational speed of the drive pulley is 1000 rpm and the belt tension is 50 N / Rib (rib) under room temperature (25 ° C.) conditions.
  • the belt was run.
  • the misalignment pulley was shifted to the front side with respect to each pulley, and the angle (sound generation limit angle) when sound generation occurred near the entrance of the misalignment pulley was obtained.
  • a V-ribbed belt is hung on each pulley of this testing machine, the rotational speed of the drive pulley is 4900 rpm, the belt winding angle around the idler pulley and the tension pulley is 90 °, the driven pulley load is 8.8 kW, and a constant load [ 395 N / 3 Rib (rib)] was applied, and the belt was run at an ambient temperature of 120 ° C. for 100 hours.
  • the sounding limit angle and sounding ability were evaluated in the same manner as the sounding resistance test (a) before the belt running test.
  • Example 3 using a fiber member having a thick knitted fabric and a high density, the variation in the friction coefficient is small. Further, when the area ratio of talc on the friction transmission surface is increased, the variation in the friction coefficient is reduced in both the dry state and the wet state.
  • Comparative Example 1 since there was no talc on the surface of the knitted fabric, the variation in the friction coefficient was large. Also, the sound resistance in the dry state was poor before and after the belt running test.
  • the power transmission belt of the present invention can be used as a friction power transmission belt such as a flat belt, a V belt, and a V-ribbed belt. Moreover, since the transmission belt of the present invention can improve the quietness at the time of flooding, it can be suitably used for high load transmission devices used outdoors such as automobiles, motorcycles and agricultural machines.
  • Friction transmission belt (V-ribbed belt) 2 ... Compressed layer 3 ... Core body 4 ... Stretched layer 5 ... Fiber member 6 ... Inorganic powder

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  • General Engineering & Computer Science (AREA)
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Abstract

La présente invention concerne une courroie de transmission de puissance par friction (1) présentant une surface de transmission de puissance par friction. La courroie de transmission de puissance par friction (1) est conçue de telle manière que : la surface de transmission de puissance par friction est recouverte d'un élément fibreux (5) contenant au moins des fibres absorbant l'eau ; et une poudre minérale (6) se trouve sur au moins la surface de l'élément fibreux.
PCT/JP2015/077191 2014-09-26 2015-09-25 Courroie de transmission de puissance par friction et son procédé de fabrication WO2016047781A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US15/513,818 US10138981B2 (en) 2014-09-26 2015-09-25 Power-transmitting friction belt and method for manufacturing same
CN201580051977.9A CN106715960B (zh) 2014-09-26 2015-09-25 摩擦传动带及其制造方法
EP15844624.5A EP3199832B1 (fr) 2014-09-26 2015-09-25 Courroie de transmission de puissance par friction et son procédé de fabrication

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JP2014196969 2014-09-26
JP2015180063A JP6527433B2 (ja) 2014-09-26 2015-09-11 摩擦伝動ベルト及びその製造方法
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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005240862A (ja) * 2004-02-25 2005-09-08 Mitsuboshi Belting Ltd 歯付ベルト
JP2006064015A (ja) * 2004-08-25 2006-03-09 Mitsuboshi Belting Ltd 摩擦伝動ベルト及び摩擦伝動ベルトの製造方法
JP2009215669A (ja) * 2008-03-10 2009-09-24 Asahi Kasei Fibers Corp 編地
JP2012225456A (ja) * 2011-04-21 2012-11-15 Mitsuboshi Belting Ltd 伝動ベルト

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005240862A (ja) * 2004-02-25 2005-09-08 Mitsuboshi Belting Ltd 歯付ベルト
JP2006064015A (ja) * 2004-08-25 2006-03-09 Mitsuboshi Belting Ltd 摩擦伝動ベルト及び摩擦伝動ベルトの製造方法
JP2009215669A (ja) * 2008-03-10 2009-09-24 Asahi Kasei Fibers Corp 編地
JP2012225456A (ja) * 2011-04-21 2012-11-15 Mitsuboshi Belting Ltd 伝動ベルト

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