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WO2018168167A1 - Bande transporteuse - Google Patents

Bande transporteuse Download PDF

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Publication number
WO2018168167A1
WO2018168167A1 PCT/JP2017/047314 JP2017047314W WO2018168167A1 WO 2018168167 A1 WO2018168167 A1 WO 2018168167A1 JP 2017047314 W JP2017047314 W JP 2017047314W WO 2018168167 A1 WO2018168167 A1 WO 2018168167A1
Authority
WO
WIPO (PCT)
Prior art keywords
rubber layer
canvas
coating layer
layer
conveyor belt
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/JP2017/047314
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English (en)
Japanese (ja)
Inventor
洋平 竹原
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bando Chemical Industries Ltd
Original Assignee
Bando Chemical Industries Ltd
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
Application filed by Bando Chemical Industries Ltd filed Critical Bando Chemical Industries Ltd
Priority to CN201780088271.9A priority Critical patent/CN110418758A/zh
Priority to JP2017568310A priority patent/JP6586475B2/ja
Publication of WO2018168167A1 publication Critical patent/WO2018168167A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B25/00—Layered products comprising a layer of natural or synthetic rubber
    • B32B25/10—Layered products comprising a layer of natural or synthetic rubber next to a fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/40—Layered products comprising a layer of synthetic resin comprising polyurethanes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
    • B65G15/00—Conveyors having endless load-conveying surfaces, i.e. belts and like continuous members, to which tractive effort is transmitted by means other than endless driving elements of similar configuration
    • B65G15/30—Belts or like endless load-carriers
    • B65G15/32—Belts or like endless load-carriers made of rubber or plastics
    • B65G15/34—Belts or like endless load-carriers made of rubber or plastics with reinforcing layers, e.g. of fabric

Definitions

  • the present invention relates to a conveyor belt.
  • the transport belt is widely used for transporting raw materials such as luxury goods, intermediate products, products, etc., and is usually composed of a laminate including a resin layer and a canvas layer.
  • a resin layer As the material for the resin layer, polycarbonate polyurethane having excellent strength and wear resistance is generally used.
  • the surface of the conveyor belt made of a resin layer is contaminated or denatured when transporting sticky conveyed items such as bread dough, confectionery dough, and cooked rice. There is an inconvenience such as.
  • the conveying belt formed with a coating made of PTFE has a high rigidity due to the influence of the film thickness, which is not desirable in terms of application to a belt conveyor having a small pulley diameter used for the folded portion. Also, the smaller the pulley diameter of the belt conveyor, the greater the stress due to the bending of the conveyor belt, and the coating layer on the outermost surface of the conveyor belt tends to peel off.
  • the present invention has been made based on the circumstances as described above, and an object of the present invention is to provide a conveyance belt that is excellent in non-adhesiveness of a conveyed product and can suppress peeling of a coating layer while suppressing rigidity. There is to do.
  • the invention made in order to solve the above-mentioned problems is a conveyor belt having a canvas as a core, laminated on one surface of the canvas, and a first rubber layer mainly composed of polycarbonate polyurethane, and A first rubber layer that is laminated on a surface opposite to the canvas and includes a coating layer mainly composed of a tetrafluoroethylene-hexafluoropropylene copolymer, and the coating layer is bonded to the first rubber layer.
  • a conveying belt having a surface modifying group on its surface.
  • the conveyance belt has a coating layer mainly composed of a tetrafluoroethylene-hexafluoropropylene copolymer as an outermost layer, and is thus excellent in non-adhesiveness of the conveyed product.
  • the first rubber layer mainly composed of polycarbonate polyurethane is laminated on one surface of the canvas, the tetrafluoroethylene-hexafluoropropylene copolymer laminated on the surface of the first rubber layer opposite to the canvas is laminated. Adhesiveness with a coating layer containing a polymer as a main component is improved. Further, the heat resistance of the first rubber layer is improved by using polycarbonate-based polyurethane as a main component.
  • the said coating layer has a surface modification group in the adhesive surface with the said 1st rubber layer, the adhesiveness of the said coating layer and a 1st rubber layer can be improved.
  • the “main component” refers to a component having the highest content, and usually refers to a component of 50% by mass or more, preferably 70% by mass or more, more preferably 90% by mass or more.
  • the average thickness of the coating layer is preferably 50 ⁇ m or less. When the average thickness of the coating layer is 50 ⁇ m or less, the rigidity of the conveyor belt can be suppressed.
  • the surface modifying group is preferably a hydroxyl group, a carbonyl group, a carboxyl group, an amino group, an amide group, or a combination thereof.
  • the surface modifying group is any of these groups, the adhesion between the coating layer and the first rubber layer can be further improved.
  • the canvas further includes a second rubber layer laminated on a surface opposite to the first rubber layer, and the second rubber layer is mainly composed of thermoplastic polyurethane.
  • the canvas is composed of warp yarns arranged in the longitudinal direction and weft yarns intersecting with the warp yarns, and the thickness of the weft yarns is preferably 1780 dtex or more and 2890 dtex or less. When the thickness of the weft of the canvas is within the above range, warping of the conveyor belt can be suppressed.
  • the “conveying belt” is a concept including not only an endless shape but also an endless shape.
  • the “outer surface” means a conveying surface, and in the case of an endless conveying belt, it means an outer surface.
  • the conveyance belt of the present invention is excellent in non-adhesiveness of the conveyed product and can suppress peeling of the coating layer while suppressing rigidity.
  • FIG. 1 is a schematic cross-sectional view of a conveyor belt 1 according to the first embodiment of the present invention.
  • the conveyor belt 1 has a canvas 5 as a core.
  • the conveyor belt 1 includes a canvas 5, a first rubber layer 4 laminated on one surface of the canvas 5, and a coating layer 2 laminated on the surface of the first rubber layer 4 opposite to the canvas 5.
  • the coating layer 2 is the outermost layer.
  • a second rubber layer 6 is laminated on the surface of the canvas 5 opposite to the first rubber layer 4.
  • the conveying belt 1 rotates while interlocking with the pulley by a driving mechanism (not shown) so that the coating layer 2 is on the outside. Accordingly, the outer surface of the coating layer 2 becomes the transport surface.
  • the conveyor belt 1 has a canvas 5 as a core.
  • the canvas 5 holds tension applied to the transport belt 1 and gives mechanical strength to the transport belt 1.
  • the canvas 5 is a woven fabric composed of warps 10 arranged in the longitudinal direction indicated by the X direction in FIG. 1 and wefts 11 intersecting with the warps.
  • the type of yarn that constitutes the warp 10 and the weft 11 include polyester yarn, nylon yarn, cotton yarn, rayon yarn, and the like.
  • the yarn constituting the canvas 5 is preferably a polyester yarn because it is excellent in strength and flexibility, has good dimensional stability, and does not generate toxic gases such as nitrogen oxides during combustion. Further, the woven structure of the canvas 5 is not particularly limited.
  • the lower limit of the thickness of the weft 11 is preferably 1500 dtex, more preferably 1780 dtex. When the lower limit of the thickness is within the above range, warping of the conveying belt 1 can be suppressed.
  • the upper limit of the thickness of the weft 11 is preferably 3000 dtex, more preferably 2890 dtex. When the upper limit of the thickness is within the above range, the rigidity of the conveyor belt 1 can be suppressed.
  • the lower limit of the thickness of the warp 10 is preferably 280 dtex, more preferably 560 dtex. When the lower limit of the thickness is within the above range, the strength of the conveyor belt 1 can be improved.
  • the upper limit of the thickness of the warp 10 is preferably 2200 dtex, more preferably 1100 dtex. When the upper limit of the thickness is within the above range, the rigidity of the conveyor belt 1 can be suppressed.
  • the canvas 5 may be subjected to a primer treatment impregnated with, for example, a urethane resin adhesive solution.
  • the lower limit of the average thickness of the canvas 5 is preferably 0.1 mm, and more preferably 0.3 mm.
  • the upper limit of the average thickness is preferably 1 mm, and more preferably 0.8 mm.
  • the first rubber layer 4 is mainly composed of polycarbonate-based polyurethane.
  • polycarbonate-based polyurethane As a main component, it is possible to improve the heat and moisture resistance, chemical resistance, mechanical properties and the like of the conveyor belt 1. Moreover, the adhesiveness with the coating layer laminated
  • the first rubber layer 4 may contain other resins such as ether polyurethane and caprolactone polyurethane in addition to polycarbonate polyurethane, if necessary.
  • the first rubber layer 4 also contains known additives such as antioxidants, light stabilizers, ultraviolet absorbers, hydrolysis inhibitors, antibacterial agents, and fungicides added to polycarbonate polyurethane for belts. It may be.
  • polycarbonate-based polyurethane known ones can be used. Although the manufacturing method of polycarbonate-type polyurethane is not specifically limited, Typically, the method of making an isocyanate compound and a polycarbonate diol compound react is mentioned.
  • isocyanate compound examples include phenylene diisocyanate, 1,5-naphthalene diisocyanate (NDI), tolylene diisocyanate (TDI), 4,4′-diphenyl diisocyanate, diphenylmethane diisocyanate (MDI), and 4,4′-tolidine diisocyanate (TODI).
  • NDI 1,5-naphthalene diisocyanate
  • TDI tolylene diisocyanate
  • MDI diphenylmethane diisocyanate
  • TODI 4,4′-tolidine diisocyanate
  • Aromatic diisocyanates such as 4,4′-diphenyl ether diisocyanate, xylylene diisocyanate (XDI), tetramethylxylylene diisocyanate (TMXDI); Cyclopentane diisocyanate, cyclohexane diisocyanate, isophorone diisocyanate (IPDI), dicyclohexylmethane diisocyanate (hydrogenated MDI), methyl-2,4-cyclohexanediisocyanate, methyl-2,6-cyclohexanediisocyanate, bis (isocyanatemethyl) cyclohexane, etc.
  • XDI xylylene diisocyanate
  • TXDI tetramethylxylylene diisocyanate
  • Cyclopentane diisocyanate cyclohexane diisocyanate
  • isophorone diisocyanate IPDI
  • Group diisocyanates examples thereof include aliphatic diisocyanates such as hexamethylene diisocyanate (HDI), pentamethylene diisocyanate, and trimethylhexamethylene diisocyanate. These isocyanate compounds can be used alone or in combination of two or more.
  • HDI hexamethylene diisocyanate
  • pentamethylene diisocyanate pentamethylene diisocyanate
  • trimethylhexamethylene diisocyanate trimethylhexamethylene diisocyanate.
  • examples of the other resin include polyolefin, polycycloolefin, polydiene, polystyrene, styrene copolymer, acrylic resin, polyester, polyamide, thermosetting polyurethane, polyvinyl chloride, and the like.
  • the lower limit of the average thickness of the first rubber layer 4 is preferably 0.1 mm, and more preferably 0.4 mm. When the average thickness of the 1st rubber layer 4 is less than the said minimum, there exists a possibility that the outstanding intensity
  • the upper limit of the average thickness of the first rubber layer 4 is preferably 1 mm, and more preferably 0.7 mm. When the average thickness of the first rubber layer 4 exceeds the above upper limit, the rigidity becomes high, and it may be difficult to use for a conveying device having a small pulley diameter.
  • the second rubber layer 6 is laminated on the surface of the canvas 5 opposite to the first rubber layer 4.
  • the coating layer 2 has a large shrinkage stress due to heat at the time of manufacture, and the conveyor belt 1 is likely to warp. Since the conveyance belt 1 includes the second rubber layer 6, warping of the conveyance belt 1 can be suppressed.
  • the second rubber layer 6 is mainly composed of thermoplastic polyurethane. In addition to the thermoplastic polyurethane, the second rubber layer 6 may contain other resins as necessary, and may contain a known additive added to the thermoplastic polyurethane for belts. .
  • thermoplastic polyurethane known ones can be used.
  • thermoplastic polyurethane include, in addition to the polycarbonate-based polyurethane similar to the first rubber layer 4, polyester-based polyurethane, polyether-based polyurethane, polyolefin-based polyurethane, and the like.
  • the method for producing the thermoplastic polyurethane is not particularly limited, but typically, as with the polycarbonate-based polyurethane, typically, approximately equimolar polyisocyanate compound and polyol compound, and chain extender are reacted at 60 ° C. or higher and 220 ° C. or lower, for example. Is mentioned.
  • polyol compound examples include polyester polyols, polyether polyols, polyolefin polyols and the like in addition to the above-described diol polycarbonate polyols. These polyol components can be used alone or in combination of two or more.
  • polyester polyol examples include at least one selected from aromatic dicarboxylic acids such as isophthalic acid and terephthalic acid or dialkyl esters thereof; aliphatic dicarboxylic acids such as adipic acid, glutaric acid and succinic acid, or dialkyl esters thereof.
  • Species of dicarboxylic acids or their dialkyl esters C 2-10 alkanediols such as ethylene glycol, propylene glycol, trimethylene glycol, 1,3-butanediol, 1,4-butanediol, 1,6-hexanediol, neopentyl glycol; di- or tri-C such as diethylene glycol
  • a reaction product with at least one alkanediol component selected from 2-10 alkanediols a reaction product with at least one alkanediol component selected from 2-10 alkanediols.
  • polyester polyols based on adipic acid as a dicarboxylic acid component include polyethylene adipate (PEA), polydiethylene adipate (PDA), polypropylene adipate (PPA), polytetramethylene adipate (PBA), Examples thereof include polyhexamethylene adipate (PHMA) and a copolymer obtained by combining these components.
  • Polyester polyols also include homopolymers or copolymers of lactones (C 3-14 lactones such as ⁇ -caprolactone, ⁇ -valerolactone, ⁇ -methyl- ⁇ -valerolactone).
  • polyether polyols examples include homopolymers or copolymers of alkylene oxides such as ethylene oxide, propylene oxide, butylene oxide, tetrahydrofuran, and 3-methyltetrahydrofuran; A homo- or copolymer comprising tetramethylene ether glycol; An alkylene oxide adduct of bisphenol A or hydrogenated bisphenol A such as an adduct obtained by adding 1 to 5 moles of C 2-4 alkylene oxide to a hydroxy group can be used.
  • alkylene oxide adduct of bisphenol A or hydrogenated bisphenol A such as an adduct obtained by adding 1 to 5 moles of C 2-4 alkylene oxide to a hydroxy group can be used.
  • polystyrene-based polyol examples include polybutadiene polyol, hydrogenated polybutadiene polyol, polyisoprene polyol, castor oil-modified polyol, and those obtained by introducing a hydroxyl group at the terminal of a copolymer of butadiene and styrene or acrylonitrile.
  • polycarbonate polyols are more preferable from the viewpoint of improving heat resistance.
  • the lower limit of the average thickness of the second rubber layer 6 is preferably 0.1 mm, and more preferably 0.3 mm. When the average thickness is less than the lower limit, there is a possibility that the warp of the conveying belt 1 cannot be suppressed.
  • the upper limit of the average thickness of the second rubber layer 6 is preferably 1 mm, and more preferably 0.8 mm. When the average thickness exceeds the upper limit, the rigidity becomes high, and it may be difficult to use the transfer apparatus with a small pulley diameter.
  • the covering layer 2 has a function of protecting the surface of the conveying belt 1.
  • the coating layer 2 is mainly composed of tetrafluoroethylene-hexafluoropropylene copolymer (FEP).
  • FEP tetrafluoroethylene-hexafluoropropylene copolymer
  • the coating layer 2 has a surface modifying group on the adhesive surface with the first rubber layer 4. Since the coating layer 2 has the surface modification group on the adhesive surface with the first rubber layer 4, adhesion between the coating layer 2 and the first rubber layer 4 can be improved.
  • the surface modifying group a hydroxyl group, a carbonyl group, a carboxyl group, an amino group, an amide group, or a combination thereof is preferable. When the surface modifying group is any of these groups, the adhesion between the coating layer 2 and the first rubber layer 4 can be further improved.
  • the surface-modifying group may be obtained by any treatment such as physical treatment such as plasma treatment or chemical treatment such as chemical etching. Among these, surface modification by plasma treatment is preferred from the viewpoint of adhesion. Groups are preferred.
  • NEOFRON FEP film B-1 can be used as a trade name of Daikin Industries.
  • the upper limit of the average thickness of the coating layer 2 is preferably 100 ⁇ m, and more preferably 50 ⁇ m. When the average thickness of the coating layer 2 exceeds the above upper limit, the rigidity of the conveyor belt 1 may be too high.
  • the lower limit of the average thickness of the coating layer 2 is preferably 14 ⁇ m, more preferably 25 ⁇ m. When the average thickness of the coating layer 2 is less than the above lower limit, the coating layer may be easily broken.
  • the conveyor belt 1 Since the conveyor belt 1 has the above characteristics, it can be suitably used as a conveyor belt for a belt conveyor having a small pulley diameter. Moreover, the said conveyor belt 1 can be used suitably also for conveyance of food etc. with much moisture and adhesiveness.
  • the manufacturing method of the conveyor belt is not particularly limited, (1) Rubber layer lamination step (2) A coating layer lamination step is provided. Hereinafter, each step will be described.
  • the first rubber layer and the second rubber layer are laminated on the canvas.
  • the first rubber layer is laminated on one surface of the canvas by extrusion molding.
  • the canvas is preliminarily treated with a primer that is impregnated with a urethane resin adhesive solution.
  • an extrusion lamination method is preferable from the viewpoints of quality stability and cost. Specifically, a resin composition for a first rubber layer containing polycarbonate-based polyurethane as a main component is laminated with a canvas while extruding with a T-die, and the first rubber layer is laminated on the canvas.
  • the heating temperature is, for example, in the range of 160 ° C. or higher and 220 ° C. or lower.
  • a second rubber layer is laminated on the surface of the canvas opposite to the first rubber layer in the same manner as the first rubber layer.
  • the covering layer is stacked on the surface of the laminate obtained in the rubber layer stacking step on the side opposite to the canvas of the first rubber layer.
  • Lamination of the coating layer is performed by thermocompression bonding the above-mentioned laminate and a film for coating layer containing FEP as a main component and having a surface modification group by plasma treatment.
  • thermocompression bonding thermocompression bonding is performed so that the surface which has the surface modification group of the film for coating layers turns into an adhesive surface with a 1st rubber layer.
  • a continuous compression molding machine using rotocure is used for the thermocompression bonding. In this way, the coating layer film is laminated on the surface of the laminate for forming the substrate.
  • a pressurizing condition in the rotocuring for example, 10 kg / cm 2 or more and 100 kg / cm 2 can be set.
  • the laminate on which the coating layers are laminated is cooled.
  • the cooling method include air cooling and water cooling.
  • the setting conditions include conditions under which the internal temperature of the formed laminate can be cooled to 10 ° C. or higher and 40 ° C. or lower.
  • the conveying belt can be formed into an endless conveying belt by cutting the laminated belt into a predetermined size and then joining the end portions of the laminate by joint processing.
  • a urethane-based adhesive can be used as the adhesive at the joining portion.
  • the joint processing for example, a lap joint method, a finger joint method, a double finger joint method, or the like can be used.
  • Example 1 to 6 and Comparative Examples 1 to 7 For Examples 1 to 6 and Comparative Examples 1 to 7, transport belts containing the coating layer forming resin shown in Table 1 and the first rubber layer and the second rubber layer forming polyurethane as materials were prepared. In Examples 1 to 6 and Comparative Examples 1 to 7, transport belts were produced based on the above-described transport belt manufacturing method. First, polyurethane, which is a first rubber layer forming composition, was melt-extruded into a thin film to form a laminate for forming a substrate by extrusion lamination. Next, the laminate for forming the substrate and the coating layer film mainly composed of the fluororesin for forming the coating layer were thermocompression-bonded at 155 ° C.
  • the resin for forming the coating layer examples include FEP (tetrafluoroethylene-hexafluoropropylene copolymer), PTFE (polytetrafluoroethylene), and a functional group-containing FEP film by plasma treatment.
  • FEP tetrafluoroethylene-hexafluoropropylene copolymer
  • PTFE polytetrafluoroethylene
  • a functional group-containing FEP film by plasma treatment As a functional group-containing PTFE film by chemical etching, Yodoflon PTFE single-sided surface-treated film of Yodogawa Hutech was used.
  • Second rubber layer As polyurethane for forming the first rubber layer, polycarbonate-based polyurethane (Milaclan E985PTFO manufactured by Tosoh Corporation) or polyether-based polyurethane (Milactolan E385MTGA manufactured by Tosoh Corporation) was used.
  • polycarbonate-based polyurethane (Milactolan E985PTFO manufactured by Tosoh Corporation) was used.
  • FIG. 2 shows reference examples (a) to (f) of the adhesion amount. It can be evaluated that 7 points or more are good, 6 points are slightly good, and 5 points or less are bad.
  • the bending rigidity was evaluated by deforming a belt having a ring shape with a width of 25 mm and a length of 150 mm as a test piece to a height close to the size of the applicable pulley diameter, and measuring the load at that time. When the measured load value is less than 250 g, which is applicable to a small pulley with a diameter of 30 mm, the small pulley is applicable, and when it is 250 g or more, it is not applicable.
  • Coating layer adhesion Durability was evaluated by performing a 180 degree peel test in accordance with JIS K6854-2 (1999) peel adhesion strength test method and observing the peeled state between the coating layer and the rubber layer. An autograph was used as a measuring instrument, and measurement was performed under conditions of a peeling rate of 50 mm / min and a measurement width of 25 mm. The case where the coating layer was torn without causing the coating layer to peel off due to the high adhesion of the coating layer was defined as “good”. On the other hand, the case where the film peeled easily due to the low adhesion of the coating layer was determined as “bad” and evaluated in two stages.
  • warp The belt was placed on a flat surface, and the height (warpage) of the belt end from the horizontal plane was measured.
  • warpage When the warpage is less than 2 mm, it can be evaluated as A, when B is 2 mm or more and less than 20 mm, C when it is 20 mm or more and less than 40 mm, and D when it is 40 mm or more.
  • A, B, and C are ranges that can be used as a conveyor belt.
  • Examples 1 to 6 having a coating layer mainly composed of tetrafluoroethylene-hexafluoropropylene copolymer and a first rubber layer mainly composed of polycarbonate-based polyurethane are non-adhesive, The bending rigidity, the adhesion of the coating layer and the height of the warp were all good.
  • the average thickness of the covering layer is less than 50 ⁇ m
  • the thickness of the weft yarn of the canvas is 1780 dtex or more and 2890 dtex or less
  • the second rubber layer is provided, the rigidity is suppressed while manufacturing. The effect of suppressing the warp of the conveying belt due to the coating layer having a large shrinkage stress due to heat was excellent.
  • Comparative Example 1 including a coating layer having no surface modification group Comparative Example 2 and Comparative Example 4 including a first rubber layer mainly composed of polyether-based polyurethane, The adhesion was poor. Further, Comparative Example 3 having no coating layer and Comparative Examples 5 to 7 having a coating layer made of PTFE were inferior to the Examples in non-adhesiveness. Furthermore, in Comparative Example 5, the thickness of the coating layer was 100 ⁇ m, so the bending rigidity was as high as 292 g. However, the thickness of the weft of the canvas was 1100 dtex, and the second rubber layer was not provided. Therefore, the effect of suppressing warpage was very poor.
  • the non-adhesiveness of the conveyed product is excellent, and since the peeling of the coating layer can be suppressed while suppressing the rigidity, it can be used for a belt conveyor having a small pulley diameter and has adhesiveness. It can be suitably used as a conveyor belt for food and the like.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Laminated Bodies (AREA)
  • Belt Conveyors (AREA)
  • Moulding By Coating Moulds (AREA)

Abstract

La présente invention concerne une bande transporteuse qui présente une excellente non-adhérence à un article transporté et qui peut supprimer le détachement d'une couche de revêtement tout en limitant la rigidité. Cette bande transporteuse met en œuvre une toile comme matériau central et comporte : une première couche de caoutchouc qui est stratifiée sur une surface de la toile et qui comprend principalement un polyuréthane à base de polycarbonate ; et une couche de revêtement qui est stratifiée sur la surface de la première couche de caoutchouc qui est opposée à la toile et qui comprend principalement un copolymère de tétrafluoroéthylène-hexafluoropropylène. La couche de revêtement présente des groupes de modification de surface au niveau de la surface qui est liée à la première couche de caoutchouc. L'épaisseur moyenne de la couche de revêtement est de préférence inférieure ou égale à 50 µm. Les groupes de modification de surface sont de préférence des groupes hydroxyle, des groupes carbonyle, des groupes carboxyle, des groupes amino, des groupes amido ou des combinaisons de ces derniers. Une seconde couche de caoutchouc est également disposée sur la surface de toile qui est opposée à la première couche de caoutchouc, et la seconde couche de caoutchouc doit comprendre principalement un polyuréthane thermoplastique.
PCT/JP2017/047314 2017-03-17 2017-12-28 Bande transporteuse Ceased WO2018168167A1 (fr)

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CN201780088271.9A CN110418758A (zh) 2017-03-17 2017-12-28 搬运用带
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113353538A (zh) * 2021-05-24 2021-09-07 江苏新联达制带科技有限公司 一种抗菌易清洁食品级输送带

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