• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Device, and procedure associated with said device, for the surface treatment of rubbers used in the manufacture of shoe soles, mainly vulcanized rubbers and peroxide rubbers, designed to remove incorporated additives from the rubber surface, in order to improve their bonding capacity by means of adhesives, comprising a closed chamber (1) in which a transport means (2) is disposed internally on which pieces of rubber (3) are arranged for irradiation by UV lamps (4), characterized in that it incorporates an ozone generator (5) for bombarding the rubber parts with ozone (3).
    公开号:ES2655329A1
    申请号:ES201631108
    申请日:2016-08-19
    公开日:2018-02-19
    发明作者:Jorge LÓPEZ CARBONELL；José Luis Beaus Navarro；Juan Alberto LÓPEZ CARBONELL
    申请人:CELTECNIA SL；
    IPC主号:
    专利说明:

    DEVICE FOR SURFACE TREATMENT OF RUBBER FOR FOOTWEAR FLOORS AND PROCEDURE ASSOCIATED WITH SUCH DEVICE
    DESCRIPTION
    5
    OBJECT OF THE INVENTION
    The present invention falls within the technical field of the devices for gluing the different parts of the footwear, as well as that of the bonding procedures comprising a pretreatment of the surfaces to be joined, and refers in particular to a device for performing the surface treatment of the rubber used for the production of shoe soles to improve its bonding properties with different adhesives, as well as the procedure associated with said device.
    15 BACKGROUND OF THE INVENTION
    In the footwear sector, the soles are usually made of materials such as rubbers and synthetic polymers (for example, EVA copolymers, polyurethane foams). However, most of these materials have low surface energies 20 (less than 30 mJ / m2), which makes it necessary to perform a surface treatment when it is required to attach it to the cutting material by using an adhesive (usually polyurethane or polychloroprene). Additionally, different components of the formulation of the rubbers and polymers can produce surface energy values of less than 30 mJ / m2, making their bonding process with adhesives even more complex.
    Halogenation is the most widely used surface treatment in the footwear sector for the chemical modification of the surface of rubber materials given its effectiveness, low economic cost and ease of application. There are different methods of halogenation of vulcanized synthetic rubbers. All of them are based on the use of solutions of a halogenating agent (an organic or inorganic chlorine or bromine donor) in an organic solvent, or of chlorine or bromine vapors.
    Halogenation is performed by applying the halogenating solution with a brush on the
    sole. It is expected for a time ranging from 20 to 45 minutes before applying the adhesive in solution. This adhesive is also applied with a brush. After 30 minutes the dry adhesive film is reactivated and attached to the cutting material.
    5
    However, halogenation has some limitations due to its potential toxicity, its low stability or the high treatment times required, among others. In addition, the use of a high concentration of halogenating agent results in a loss of adhesion as a result of the degradation of the outermost surface layer of the rubber and the deposition of halogenating agent residues on the surface.
    On the other hand, some families of rubbers contain certain additive compounds, either due to manufacturing needs, usually vulcanization, or to provide them with a protection against ultraviolet radiation in order to avoid aging by sun exposure. The main additives used for these purposes are zinc stearates and microcrystalline protective waxes. These compounds migrate to the surface to improve the durability of the rubbers, and must be removed from the surfaces to be treated with ultraviolet radiation, which is generally done manually and fundamentally using chlorinated solvents, which implies a high degree of heterogeneity. in the elimination of these substances, as well as an increase in the toxicity of the process due to the use of said solvents.
    Another drawback of manual disposal is that it depends to a large extent on the state of the devices and cleaning elements, which generally end up containing a large number of waxes, stearates and other elements from previous cleaning cycles. in cleaning solvents, rags and brushes, reducing the cleaning efficiency of the substances to be removed. Also, the three-dimensional arrangement of the interior surfaces, voids, vertical surfaces and 30 fingerprints defined in the rubber prevent them from being accessible for manual cleaning. Said micro surfaces are fundamental in the production of soles by casting or injecting polyurethane directly to the cut, since they allow the entire rubber sole to be covered by the polyurethane and to be jointly attached to it.
    Finally, cleaning with chlorinated solvents, preferably Mek (Methyl Ethyl Ketone) or Acetone, produces a potential difference that accelerates the migration to the surface of waxes and stearates, possibly because the change of state of these solvents produces a gradient of Important temperature that accelerates migration to the surface. In the industry, the application of adhesive is recommended at a stage immediately after the UV / O3 treatment, mainly to improve its initial adhesion, which depends largely on the amount of waxes and starates present at the time of application of the adhesive .
    10 Procedures for the treatment of rubbers for forming shoe soles by ultraviolet radiation combined with the action of an ozone flow generated by the radiation itself on a forced air flow, which improve the results obtained are known in the state of the art by the halogenation described above.
    fifteen
    The study of the final result of these treatments reveals that the surface layers of protective substances incorporated into the rubber decrease their thickness depending on both the surface heat reached and the amount of oxygen free radicals generated during UV radiation.
    twenty
    DESCRIPTION OF THE INVENTION
    The object of the invention consists of a device for the surface treatment of rubbers used in the manufacture of shoe soles, mainly vulcanized rubbers and peroxide rubbers, intended to remove incorporated additives from the surface of the rubber to thereby improve their bonding capacity by adhesives, as well as in the procedure associated with said device.
    The procedure is based on the incorporation of a stage of radiation with ozone 30 (O3) to the emission of ultraviolet radiation usually used in the treatment of
    rubber surfaces, and the additives to be removed are mainly zinc stearates and microcrystalline protective waxes, which migrate to the surface of the rubber and make it difficult to bond with adhesives to make shoe soles.
    Stearates, present in vulcanized rubbers, migrate in their reaction (stationary acid and zinc oxide) to the surface to prevent the pieces, also referred to as proformas, made from said rubber pieces from joining together during storage before of the vulcanization process.
    5
    On the other hand, microcrystalline protective waxes, also referred to as anti-ozone waxes, are incorporated into the formulation so that they migrate to the surface continuously over the life of the rubber sole to protect from sunlight. These compounds migrate mainly due to their low molecular weight when there is a potential unbalanced energy between the surface and the rubber interface, such that when this equilibrium disappears, the waxes disposed at the interface migrate to the surface by balancing their potential energy.
    The superficial elimination of the additives by this treatment does not affect the preservation of the soles obtained from the treated rubber parts, since different tests carried out have established values of wax thicknesses similar to those prior to the treatment after 24 hours .
    For this, a plurality of untreated rubber parts are introduced by a continuous system, such as a conveyor belt 20, into a device comprising a closed chamber, inside which a plurality of ultraviolet light emitting lamps are placed, intended to radiate superiorly, for a variable period of time, the plurality of rubber parts. An ozone generator is incorporated into the plurality of emitting lamps, to massively bombard the surface of the rubbers.
    In a first preferred embodiment, the ozone generator is incorporated into the interior of the chamber in an intermediate position to the plurality of UV emitting lamps, so that the interior of the chamber is divided into a first zone of ultraviolet radiation 30 followed by an area where ozone bombardment occurs, to end with a second and last zone of ultraviolet radiation. According to this embodiment, the radiation zone is divided into a first, which represents approximately 2/3 of the total, and a second, corresponding to the remaining 1/3.
    The radiation times depend on various factors such as the chemical composition or the geometry of the rubber parts. Some of these pieces have vertical walls, called helmets, which are irradiated with a lower efficiency, so a specific irradiation time cannot be specified, but periods 5 that vary depending on these factors. A usual period to obtain an effective treatment is one that ranges between 60 and 300 seconds of irradiation time.
    A second preferred embodiment provides the ozone emitter at a stage prior to the radiation of the rubber parts, while in a third embodiment the ozone treatment of the rubber parts is carried out after the ultraviolet radiation.
    Once the rubber parts are treated, they are removed from the chamber. The adhesive, generally of polychloroprene or any other of those usually used in the manufacture of shoes, can be applied to the piece using any procedure immediately after the treatment is carried out or after some time has elapsed since said treatment. Once the adhesive is applied, the binding is made to any sole material used in the manufacture of shoes (such as cloth, leather, imitation leather, or any other) by any known procedure.
    twenty
    The device of the invention, and the method associated therewith, allows to obtain a homogeneous cleaning of all the rubber surfaces subjected to the treatment, with a removal of volatile chlorinated solvents. A reduction in the migration of waxes and stearates to the treated surface is also achieved, with the consequent improvement of the initial adhesions, and an increase in the surface of oxygenated, carbonyl and carboxylic species that increases the reactivity of the isocyanates used in adhesives and paints for shoe soles, improving adhesion to treated surfaces with the combined action of UV and O3.
    30 DESCRIPTION OF THE DRAWINGS
    To complement the description that is being made and in order to help a better understanding of the characteristics of the invention, according to a preferred example of practical realization thereof, it is accompanied as an integral part of
    5
    10
    fifteen
    twenty
    25
    30
    Said description, a drawing where, for illustrative and non-limiting purposes, the following has been represented:
    Figure 1.- Shows a perspective view of the device for surface treatment of rubbers according to a first preferred embodiment, in which the ozone generator is placed in an intermediate position to the ultraviolet lamps.
    PREFERRED EMBODIMENT OF THE INVENTION
    Next, a detailed explanation of a preferred embodiment of the object of the present invention is provided with the aid of the aforementioned figure.
    The rubber surface treatment device for shoe soles described is formed by a closed chamber (1), essentially prismatic, at the lower end of which a transport means (2) is arranged, which in this case is a belt mobile conveyor, which runs inside the chamber (1) between an access and an exit.
    A plurality of rubber parts (3) to be treated are arranged on the means of transport (2), while a plurality of UV lamps (4), as well as a generating element, are arranged at an upper end of the chamber (1). of ozone (5), facing the means of transport (2) to emit respectively ultraviolet radiation and an ozone bombardment on the rubber parts (3) arranged on the surface of said means of transport (2).
    As seen in Figure 1, the present preferred embodiment incorporates the ozone generating element (5) disposed in an intermediate position in the plurality of UV lamps (4), approximately 2/3 of its total length.
    In the preferred embodiment described herein, the UV lamps (4) are made of synthetic quartz crystal, with an irradiance of 650 ^ iW / cm2, and are located superiorly to the means of transport (2), at a distance of one meter. On the other hand, the ozone generator (5) used has an approximate O3 production of 40 grams / hour.
    5
    10
    fifteen
    twenty
    25
    30
    The rubber surface treatment process for shoe soles that uses the device thus described comprises the following successive steps:
    - arrangement of the plurality of rubber parts (3) on the means of transport (2) at the entrance of the chamber (1),
    - introduction of the rubber parts (3) inside the chamber (1) by advancing the transport means (2),
    - first irradiation of the rubber parts (3) by the UV lamps (4), at a wavelength between 130 and 185 nm for a time interval of between 60 and 300 seconds,
    - bombardment of rubber parts (3) with ozone from the ozone generator (5),
    - second irradiation of rubber parts (3) by UV lamps
    (4), and
    - Removal of the chamber (1) of the rubber parts (3) treated, for the subsequent application of adhesive and fixation to the other materials of the sole.
    In a second embodiment of the process, the bombardment of the rubber parts (3) with ozone from the ozone generator (5) is carried out at a stage prior to irradiation by the UV lamps (4).
    In a third embodiment of the process, the bombardment of the rubber parts (3) with ozone from the ozone generator (5) is carried out at a stage after irradiation by the UV lamps (4).
    权利要求:
    Claims (3)
    [1]
    5
    10
    fifteen
    twenty
    25

    1. Device for the surface treatment of rubbers used in the manufacture of shoe soles, mainly vulcanized rubbers and peroxide rubbers, intended to remove incorporated additives from the surface of the rubber, in order to improve their bonding capacity through adhesives, comprising a closed chamber (1) in which a transport means (2) are arranged inside on which rubber parts (3) are arranged for irradiation by UV lamps (4), characterized in that it incorporates a Ozone generator (5) for ozone bombardment of rubber parts (3).
    [2]
    2. Procedure for the surface treatment of rubbers using the device described in claim 1, characterized in that it comprises the following sequence of action:
    - arrangement of the plurality of rubber parts (3) on the means of transport (2) at the entrance of the chamber (1),
    - introduction of the rubber parts (3) inside the chamber (1) by advancing the transport means (2),
    - first irradiation of the rubber parts (3) by the UV lamps (4),
    - bombardment of rubber parts (3) with ozone from the ozone generator (5),
    - second irradiation of rubber parts (3) by UV lamps
    (4), and
    - Removal of the chamber (1) of the rubber parts (3) treated, for the subsequent application of adhesive and fixation to the other materials of the sole.
    [3]
    3. Method for the surface treatment of rubbers according to claim 2 characterized in that the irradiation of the rubber parts (3) by the UV lamps (4) occurs at a wavelength between 130 and 185 nm during a Time interval between 60 and 300 seconds.
    类似技术:
    公开号 | 公开日 | 专利标题
    WO2001022844A1|2001-04-05|Process for treating shoe soles through ultraviolet radiation and ozone
    ES2655329B1|2018-11-27|DEVICE FOR SURFACE TREATMENT OF RUBBER FOR FOOTWEAR FLOORS AND PROCEDURE ASSOCIATED WITH SUCH DEVICE
    Hama et al.1970|Electron spin resonance studies of polycarbonate irradiated by γ‐rays and ultraviolet light
    ES2552464T3|2015-11-30|Stabilizer bar with integrated bearing and support
    RU2004126142A|2005-03-10|METHOD FOR MANUFACTURING THE SOLE FOR SHOES CONSISTING OF THE CONNECTED PROTECTIVE PART OF THE SOLE OF VOLCANIZED RUBBER AND THE MIDDLE PART OF THE SOLE OF POLYURETHANE
    ES2559832T3|2016-02-16|Composite layer
    Jowsey1955|The use of the milling machine for preparing bone sections for microradiography and microautoradiography
    BR112017018948A2|2018-04-17|method
    CN104146441A|2014-11-19|Method for handling shoe sole before bonding
    JP2015029105A5|2016-07-07|
    BRPI0802571A2|2010-03-30|procedure for the treatment of shoe soles by ultraviolet radiation
    WO2005121046A1|2005-12-22|Method for the polymerisation of resins that are applied to marble, using microwaves
    ES2420762B1|2014-06-17|Procedure of fixing a sole to the cut of footwear
    RU2018136347A|2020-05-14|DEVICE FOR RADIATION THERAPY, INCLUDING THE IONIZATION MODULE AND THE UV SOURCE OF THE LIGHT
    RU2696149C2|2019-07-31|Diffuser of polycarbonate head lamp with embedded film which provides scratch resistance and uv protection, and method of making such diffuser
    KR101716325B1|2017-03-15|Method for generating thermal protection index
    KR101682895B1|2016-12-06|Health shoes for sterilized using solar energy
    Bagratashvili et al.2001|An EPR and optical spectroscopy study of the effect of laser radiation on biological tissues
    KR20160000153A|2016-01-04|Shose HotPack
    ES1248265U|2020-06-24|ANTI VIRUS FOOTWEAR INSOLES |
    JP2005253479A|2005-09-22|Low radioactive negative ion generation material and material for footwear using the same
    KR20150046589A|2015-04-30|Shoes sterilizer
    Ke et al.2018|Radiosensitization of clioquinol combined with zinc in the nasopharyngeal cancer stem-like cells by inhibiting autophagy in vitro and in vivo
    XU et al.2017|Application of radioactive particle interstitial implant brachytherapy in the treatment of malignant adenogenous tumors invaded into cranial base area
    US1240116A|1917-09-11|Vulcanization of rubber and other similar substances.
    同族专利:
    公开号 | 公开日
    ES2655329B1|2018-11-27|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US20140093655A1|2012-10-01|2014-04-03|Orisol Asia Ltd.|Method for Applying Hot Melt Adhesive Powder onto a Shoe or Sole Part|
    CN104146441A|2014-08-14|2014-11-19|广东新优威印刷装备科技有限公司|Method for handling shoe sole before bonding|
    法律状态:
    2018-11-27| FG2A| Definitive protection|Ref document number: 2655329 Country of ref document: ES Kind code of ref document: B1 Effective date: 20181127 |
    优先权:
    申请号 | 申请日 | 专利标题
    ES201631108A|ES2655329B1|2016-08-19|2016-08-19|DEVICE FOR SURFACE TREATMENT OF RUBBER FOR FOOTWEAR FLOORS AND PROCEDURE ASSOCIATED WITH SUCH DEVICE|ES201631108A| ES2655329B1|2016-08-19|2016-08-19|DEVICE FOR SURFACE TREATMENT OF RUBBER FOR FOOTWEAR FLOORS AND PROCEDURE ASSOCIATED WITH SUCH DEVICE|
    [返回顶部]