WO2015139323A1

WO2015139323A1 - Pretreatment method by cementing procedure for shoe components and system therefor

Info

Publication number: WO2015139323A1
Application number: PCT/CN2014/073902
Authority: WO
Inventors: 陈均远; 林怡伶
Original assignee: 欧利速精密工业股份有限公司
Priority date: 2014-03-21
Filing date: 2014-03-21
Publication date: 2015-09-24

Abstract

Provided are a pretreatment method by a cementing procedure for shoe components and a system therefor, the method mainly using a UV irradiation procedure to replace a general pretreatment by a cementing procedure for coating a shoe component substrate with a primer. By providing a cementing procedure pretreatment of first UV-C irradiating and then cleaning, the bonding strength between the cement and the shoe component substrate are indeed effectively improved, under the premise that the equipment cost is not substantially increased. In addition, the shoe component substrate is conveyed by a conveying device to be subjected to UV-C irradiation, ozone activation and a reaction chamber for cleaning successively, and the above-mentioned reaction chamber is repeatedly set to improve the activation degree of the surface of the shoe component substrate, so as to improve the cementation quality between the cement and the shoe component substrate in the subsequent cementing process.

Description

Shoe component coating step pretreatment method and system thereof

Technical field

The invention relates to a pretreatment of a cement coating process in a shoemaking process, in particular to a method of pre-treatment of a coating process by replacing the existing primer coating procedure with a method of cleaning after UV irradiation and a system thereof. Method and system. Background technique

Heat activated cements are increasingly used because they can produce a thin layer of adhesion simply and quickly without releasing significant amounts of volatile organic compounds in the process. However, heat-activated cements are not suitable for use on a variety of materials, such as footwear components made primarily of rubber or EVA. In order to improve adhesion, the shoe component substrate can now be pretreated by irradiation with chlorine or ozone plasma, or in combination with UV irradiation with an aggressive primer containing an organic solvent.

The specific step of the pretreatment of the ordinary gluing process is as shown in FIG. 1, which is to form the shoe component substrate between the press forming step S11 and the gluing step S15, first including alkaline cleaning S121, water cleaning S122 and/or acidity. The cleaning step S12 of the cleaning S123 cleans the shoe component substrate, and manually delivers it to the stock fitting line step S13, and then performs the primer coating step S14 and the in-furnace heating step S141 on the shoe component substrate. The primer is cured on the shoe component substrate, and the glue step S15 is followed by the adhesive, the furnace heating step S151, and finally the shoe component is adhered to the shoe body in the bonding step S16.

Wherein, when the shoe component substrate is rubber, as shown in FIG. 2, the steps of pre-treatment of the adhesive coating process include washing S21, primer S22, furnace heating S221, coating adhesive and Primer S23, furnace heating S231, and finally the main glue S24, furnace heating S241, complete the bonding and attaching S25, and increase the grinding skin S26 between the primer S22 and the furnace heating S221 according to the process requirements. Process. When the shoe component substrate is EVA, as shown in FIG. 3, the pretreatment steps S31 to S35 are substantially the same as the pretreatment steps S21 to S25 of the rubber-like shoe component substrate, except that the EVA material is environmentally resistant. Higher, need to use grafting to provide functional groups The adhesion is increased, so that after the primer S32, after heating the S321 in the furnace, before applying the adhesive and the primer S33, the step of adding UVA irradiation for surface grafting provides a functional group to increase the adhesion S322.

Therefore, from the foregoing description, it has been found that the application of UV irradiation has been found in the footwear industry. It is worth noting that, in the past, the shoe factory applied the rubber coating treatment to the shoe component substrate after the first step of washing, or only UV irradiation. The material of the shoe parts, such as rubber and TPU, must be etched or grafted with special chemicals to enhance the adhesion of the raw materials. Therefore, in practice, a large amount of pretreatment agent cannot be avoided, resulting in damage to the environment and personnel. Volatile chemical.

In addition, through the pretreatment of the conventional shoe component substrate, it can be seen that the pretreatment process of the conventional gluing process still requires the assistance of the human resources, and the complete automated pretreatment production line cannot be formed, and the overall production efficiency needs to be improved. Moreover, the pretreatment of the ordinary gluing process mainly improves the bonding effect of the shoe component substrate and the cement by applying the primer, but the primer needs to be heated and cured by the heating furnace after coating, but it is difficult to improve the shoe component base. The combination of material and cement has the problem that the cost of the pretreatment equipment is high but the effect is not satisfactory. Summary of the invention

The technical problem to be solved by the present invention is to provide a pretreatment method for the rubber coating process of a shoe component, which mainly uses an ultraviolet-C (hereinafter referred to as UV-C) irradiation procedure to replace the usual coating of the primer on the shoe component substrate. Pretreatment of the process, by providing a pre-treatment of the gluing process after UV-C irradiation, to reduce the use of chemicals, reduce manpower, reduce water use, and effectively improve adhesion without significantly increasing equipment costs. An automated production method for bonding strength between solid glue and shoe component substrates.

In order to solve the above problems, the present invention provides a pretreatment method for a shoe component coating process, which is performed between a shoe component press forming step and a gumming step in a shoemaking process, wherein the pretreatment method step comprises: providing a shoe component substrate; the shoe component substrate is conveyed through a conveying device into a first chamber of a UV irradiation device, wherein the UV irradiation is performed by ultraviolet-C (UV-C) irradiation at a wavelength of 200 to 280 nm. The surface of the shoe component substrate is activated by ozone generated by UV irradiation to produce a cleaning effect; the shoe component substrate is transported by the conveying device into a second chamber of the cleaning device, and the cleaning device can be ultrasonic shock washing Machine, ion fan or constant-voltage paddle cleaner, which makes the surface of the shoe component substrate etched by tiny substances Removing the cleaning device and passing the shoe component substrate into a third chamber having the same function as the first chamber for UV-C irradiation, repeatedly activating the surface of the shoe component substrate with ozone to generate an etching effect And selectively transporting the shoe component substrate through the conveyor to a fourth chamber having the same function as the second chamber for secondary cleaning.

Another technical problem to be solved by the present invention is to provide a system for the pretreatment method of the above-mentioned shoe component gluing process, which mainly transports the shoe component substrate through the conveying device sequentially through UV irradiation, ozone activation and cleaning. The reaction chamber, by repeatedly setting the reaction chamber to improve the activation degree of the surface of the shoe component substrate, and improving the bonding quality of the cement and the shoe component substrate in the subsequent coating process.

In order to solve the above problems, the present invention provides an ultraviolet irradiation system for the pretreatment method of the shoe component coating step, which is used for pre-coating a shoe component substrate, wherein the system comprises: a conveying device, The first chamber is disposed on the conveying device, and is internally provided with a UV lamp for outputting UV-C radiation to generate ozone having a concentration of 30 to 80 ppm, and a row is arranged at the top of the first chamber. a second chamber, disposed after the first chamber, is disposed on the conveying device, and is internally provided with a cleaning device including a cleaning liquid; a third chamber is connected to the second chamber And then disposed on the conveying device, the interior is provided with a UV lamp for outputting UV-C radiation to generate 30 to 80 ppm of ozone, and the third chamber is provided with a discharge port at the top for discharging ozone; The conveying device conveys, the surface of the shoe component substrate is activated by ozone in the first chamber for UV-C irradiation to generate an etching effect, and the surface micro-substance is removed for the cleaning device in the second chamber, and the shoe portion In the third indoor surface of the substrate again by UV-C irradiation is activated to produce a secondary ozone etching effect. DRAWINGS

Figure 1 is a schematic flow chart of the pretreatment of the conventional gluing process.

Fig. 2 is a schematic view showing a pretreatment process of a specific rubber coating process of a conventional rubber shoe component substrate. Fig. 3 is a schematic diagram of a pretreatment process of a specific gluing process of a conventional EVA shoe component substrate. 4 is a schematic flow chart of the pretreatment of the gluing step of the present invention.

Fig. 5 is a schematic view showing a pretreatment process of a specific rubber coating step of the rubber shoe component substrate of the present invention.

Fig. 6 is a schematic view showing the overall structure of the system for pretreatment of the gluing process of the present invention. Fig. 7 is a view showing the mechanism of the present invention for activating the surface of a shoe component substrate by UV irradiation and ozone. Figs. 8A and 8B are SEM scanning electron micrographs of the rubber shoe component substrate of the present invention before and after the UV irradiation process.

Description of the reference numerals

Stamping step S11

Alkaline cleaning S121 water cleaning S122

Acid cleaning S123 Manual delivery to soles supply step S13 Primer coating step S14 Furnace heating step S141

Gluing step S15 In-furnace heating step S151

Bonding step S16

Wash S21 Primer S22

Furnace heating S221 Coated adhesive and primer S23

Furnace heating S231 Main glue S24

Furnace heating S241 adhesive attachment S25

Microdermabrasion S26

Washing S31 Primer S32

Furnace heating S321 UVA irradiation S322

Coated adhesive and primer S33 Furnace heating S331

Main glue S34 furnace heating S341

Bonding and attaching S35

Second room 2

Fourth room 4

Shoe component substrate 6

Cleaning solution 7 UV lamp 8

Exhaust port 9 drying device 10

UV lamp 11 discharge port 12

Cleaning solution 13 drying device 14 UV irradiation step S423 cleaning step S424

Gluing step S43 In-furnace heating step S431

Bonding step S44

UV irradiation program S51 main glue S52

Furnace heating S521 adhesive attachment S53

4 to 8B, with reference to Figs. 7 to 8B, a specific embodiment of a method for pretreating a shoe part coating step and a system thereof according to the present invention will be described below.

As shown in FIG. 4, the shoe component coating step pretreatment method of the present invention is in the shoemaking process, after the shoe component substrate 6 having a specific shape, size, color is obtained through the press forming step S41, and the shoe is Before the component substrate 6 is coated with the glue coating step S43, a UV irradiation step S42 is performed, which mainly includes a UV irradiation step S421 and a cleaning step S422 irradiated with UV-C, and may be based on the shoe component substrate. 6 Material Characteristics, the above steps are repeated in groups to perform the UV irradiation step S423, the cleaning step S424, or only the UV irradiation step S423 is repeated.

As shown in FIG. 6, the ultraviolet irradiation system for performing the UV irradiation step S42 of the present invention comprises a conveying device 5 for conveying the shoe component substrate 6 and four reaction chambers disposed therewith, which are sequentially defined as one. The first chamber 1, the second chamber 2, the third chamber 3, and the fourth chamber 4. among them:

The first chamber 1 is internally provided with a UV lamp 8 for providing energy levels of 2.0 to 5.0 J/cm, thereby irradiating ozone with a concentration of 30 to 80 ppm, and an exhaust port 9 is provided at the top of the first chamber 1. In the present embodiment, the UV lamp 8 is in the form of a lamp tube, and the number is preferably 10 to 46 mm. However, the present invention is not limited thereto, and can be replaced according to actual use requirements. Other forms of UV lamps that can be used for excitation purposes.

The second chamber 2 is connected to the first chamber 1 and is internally provided with a cleaning device. In the embodiment, the cleaning device is an ultrasonic vibration washing machine, which is provided by outputting an ultrasonic frequency oscillation. The cleaning liquid 7 of the second chamber 2 completely immerses the shoe component substrate 6 in the cleaning liquid 7, and ultrasonically cleans the surface to remove minute substances such as silicone oil; however, in the embodiment, the cleaning device is Not limited to ultrasonic shock absorbers, it can also be an ion fan or an ordinary piezoelectric paddle cleaner. Wherein, the outlet of the second chamber 2 is provided with a drying device 10, and the drying device 10 includes a An air knife (not shown) and a plurality of NIR heating lamps (not shown) that output a small and strong airflow, thereby leaving most of the remaining in the shoe component The surface cleaning liquid 7 is removed by the air knife of the drying device 10 and the near-infrared heat lamp.

The third chamber 3 is connected to the second chamber 2, has the same structure and function as the first chamber 1, and is internally provided with a UV lamp 11 for outputting UV-C for illumination and an ozone discharge port 12 at the top. The third chamber 3 is arranged to secondarily activate the surface of the shoe component 6 to obtain a better reaction effect and improve subsequent cementation quality.

The fourth chamber 4 has the same configuration and function as the second chamber 2, and is optionally connected to the third chamber 3. When the fourth chamber 4 is provided, a cleaning device including the cleaning liquid 13 and ultrasonic cleaning is provided inside to ultrasonically clean the shoes by oscillating the cleaning liquid 13 provided in the fourth chamber 4 by outputting an ultrasonic frequency. In the present embodiment, the cleaning liquid 13 of the fourth chamber 4 has the same composition as the cleaning liquid 7 of the second chamber 2, or the cleaning liquid 13 of the fourth chamber 4 It is adjusted according to the material characteristics of the shoe component base material 6 to be different from the cleaning liquid 7 of the second chamber 2. Further, the second chamber 2 may be removed as needed, or may be removed by using a sulfur-containing cleaning molecule. Improve the cleaning effect. And a drying device 14 at the exit of the fourth chamber 4 includes an air knife and a near-infrared heat lamp for removing the residual cleaning liquid 13 on the surface of the shoe component substrate 6.

Therefore, the present invention provides a pretreatment method of the gluing step after the first UV irradiation by the ultraviolet irradiation system, and the method steps include:

Providing a formed shoe component substrate 6, which is made of a material selected from the group consisting of rubber, EVA, PU or TPU;

The shoe component substrate 6 is transported via a transport device 5 into a first chamber 1 in which a UV irradiation device is disposed. The UV irradiation refers to irradiation with ultraviolet-C (UV-C) at a wavelength of 200 to 280 nm. The surface of the shoe component substrate 6 is activated by ozone generated by UV-C irradiation to produce an etching effect;

The shoe component substrate 6 is conveyed by the conveying device 5 into a second chamber 2 in which the cleaning device is disposed, so that minute substances on the surface of the shoe component substrate 6 are removed by the cleaning device;

The shoe component substrate 6 is transported by the conveying device 5 into a third chamber 3 having the same function as the first chamber 1 for UV-C irradiation, and the surface of the shoe component substrate 6 is repeatedly activated by ozone. Producing an etch effect;

The shoe component substrate 6 is selectively conveyed via the conveying device 5 into a fourth chamber 4 having the same function as the second chamber 2 for secondary cleaning.

Here, the conveying speed setting of the conveying device 5 is adjusted based on the fact that the time of the shoe member 6 in the inside of the first chamber 1 can be well correlated with ozone and UV-C irradiation.

Thereby, as shown in FIG. 5, when the present invention is applied to the rubber coating step of the rubber shoe component substrate 6, it is only necessary to automatically perform a UV irradiation process S51 by the above ultraviolet irradiation system, and then the main coating can be performed. The glue S52 and the furnace are heated to S521, and finally the adhesive attaching S53 is completed. Compared with the ordinary rubber coating step pretreatment, the invention replaces the ordinary primer coating by the UV irradiation program S51, and has the effect of significantly simplifying the process.

The above is a specific embodiment of the pretreatment method of the shoe component coating step of the present invention and the ultraviolet irradiation system thereof. The reaction mechanism, examples and detection results of the ultraviolet irradiation procedure of the present invention will be described below.

As shown in Fig. 7, the mechanism for activating the surface of the shoe component substrate by UV irradiation and ozone in the pretreatment method of the shoe component coating step of the present invention will be described. As shown in the figure, the use of UV-C irradiation to provide oxygen molecular energy, which decomposes oxygen molecules into oxygen atoms and combines them to form ozone, is a widely used ozone generating technology. The invention utilizes the characteristics of strong ozone reaction and easy decomposition, so that when the ozone is in contact with the surface of the shoe component substrate 6, sufficient energy is provided by UV irradiation to damage the material bonding structure of the shoe component substrate 6, and the free functional group is released. An etching effect is formed on the surface of the shoe component substrate 6, and the surface of the shoe component substrate 6 is made to increase the bonding ability of the cement to the shoe component substrate 6 through the etched surface structure. Further, selecting a cleaning liquid in accordance with the Le Chatelier principle in the cleaning step will simultaneously assist in releasing more free functional groups during cleaning. In the present embodiment, the cleaning liquids 7, 13 may be detergents and/or Or water, acidic solution, alkaline solution or buffer solution.

In the present invention, FIG. 7, 8A, and 8B are examples of the rubber shoe component substrate 6 as an example. After reacting with ozone, the R-CH3 therein is destroyed by ozone, thereby generating a free functional hydroxyl group (-OH). Fig. 8A is a micrograph showing a smooth surface before the rubber reacts with ozone, and Fig. 8B is a micrograph showing the uneven surface of the rubber surface after the reaction. Based on the Le Chatelier principle, reducing the pH of the environment in which the shoe component substrate 6 is placed will contribute to the release of free hydroxyl groups (mono-OH). Therefore, in this embodiment, ultrasonic cleaning is performed with an acidic cleaning solution. Help The release of more free hydroxyl groups (—OH) on the surface of the rubber shoe component substrate 6 makes the etching effect more obvious; preferably, the sulfuric acid (H ₂ S0 ₄ ) is used as the cleaning liquid to have the rubber shoe component base. The surface of the material 6 forms more carboxyl (-COO) and carbonyl (one C = 0), and greatly improves the bonding ability of the shoe component substrate 6 and the cement.

The following test results from Tables 1 to 3 illustrate the ability of the present invention to bond the rubber shoe component substrate 6 to the cement. 1 to 3 are the shoe component substrate 6 in the first chamber 1, irradiated with 2.0-5.0 J/cm UV-C to produce ozone 30-80 ppm; in the second chamber 2, with detergent and Ultrasonic vibration washing of water; in the third chamber 3, irradiation with 2.0-5.0 J/cm UV-C, generating ozone 30-80 ppm; finally, in the fourth chamber 4, after ultrasonic washing with water, The obtained shoe parts are subjected to a normal temperature pull test, a washing + pulling test, and a hydrolysis+pulling test result.

In summary, the present invention achieves pretreatment by a continuously connected automated production line through the aforementioned shoe component coating step pretreatment method and its ultraviolet irradiation system, and utilizes UV-C without significantly increasing equipment cost. Irradiation and ozone activation form an etching effect, and the bonding strength between the cement and the shoe component substrate is surely and effectively improved. In addition, the present invention provides an ultraviolet irradiation system that is cleaned after UV irradiation, and a shoe component substrate having different material properties. 6, can directly increase the UV-C irradiation ozone activation reaction chamber and / or the reaction chamber for cleaning, to increase the applicable breadth of the UV irradiation system, and can pass more than one UV-C irradiation and cleaning The activation degree of the surface of the shoe component substrate 6 is improved, and the bonding quality of the cement and the shoe component substrate in the subsequent coating process is improved.

Claims

Claim

A pretreatment method for a shoe component coating step, which is performed between a shoe component press forming step and a gumming step in a shoemaking process, wherein: the pretreatment method step comprises:

Providing a shoe component substrate;

Transmitting the shoe component substrate through a conveying device into a first chamber of a UV irradiation device, wherein the UV irradiation refers to irradiation with UV-C, and the surface of the shoe component substrate is activated by ozone generated by UV irradiation. Producing an etching effect;

Transmitting the shoe component substrate into a second chamber of the cleaning device via the conveying device, so that the micro-material generated by the etching on the surface of the shoe component substrate is removed by the cleaning device; and the shoe component is conveyed by the conveying device Passing the substrate into a third chamber having the same function as the first chamber for UV-C irradiation, repeatedly activating the surface of the shoe component substrate with ozone to generate an etching effect;

The shoe component substrate is selectively conveyed by the transport device into a fourth chamber having the same function as the second chamber for secondary cleaning.

The shoe component gluing step pretreatment method according to claim 1, wherein the shoe component substrate is made of a material selected from the group consisting of rubber, EVA, PU or TPU.

The method for pre-processing a shoe component coating process according to claim 1, wherein the cleaning device is an ultrasonic cleaning device, which is configured to oscillate in the second chamber by outputting an ultrasonic frequency oscillation. Liquid, ultrasonic cleaning to remove tiny substances on the surface of the shoe component substrate.

The method for pre-processing a shoe component coating process according to claim 3, wherein: when the fourth chamber is connected to the third chamber, the fourth indoor portion is provided with the same as the second chamber The cleaning device is an ultrasonic cleaning device that oscillates the cleaning liquid disposed in the fourth chamber by outputting an ultrasonic frequency, and ultrasonically removes minute substances on the surface of the shoe component substrate, the fourth The cleaning liquid of the chamber has the same composition as the cleaning liquid of the second chamber, or the cleaning liquid of the fourth chamber is adjusted to be different from the cleaning liquid of the second chamber according to the material properties of the base material of the shoe component.

The method for pretreating a shoe component coating step according to claim 3 or 4, wherein the cleaning liquid is a detergent and/or water.

The method for pretreating a shoe component coating step according to claim 3 or 4, wherein the cleaning liquid is a buffer solution, an acid solution or an alkali solution.

The method for pre-treating a shoe component coating process according to claim 1, wherein: the conveying speed of the conveying device is set in time energy of the shoe component in the first interior with ozone and UV-C The irradiation is well-reacted as a guideline for adjustment.

The method for pre-treating a shoe component coating process according to claim 1, wherein: the second chamber and other reaction chambers having the same function are provided with a drying device at the outlet to make the shoe component substrate When the output enters the next reaction chamber, the cleaning liquid remaining on the surface of the shoe component substrate is dried by the drying device by the cleaning device.

The method for pre-processing a shoe component coating process according to claim 1, wherein: the method is based on the material properties of the shoe component substrate, and the setting function is repeated in groups on the conveying device. The chamber has the same UV-C irradiation reaction chamber and the same cleaning reaction chamber as the second chamber, so that the shoe component substrates of different materials react with ozone sufficiently to produce an etching effect.

10. An ultraviolet irradiation system for use in a pretreatment method for a shoe component coating process according to claim 1, wherein the shoe component substrate is subjected to a gluing process pretreatment, wherein: the system comprises:

a conveying device for conveying the shoe component substrate;

a first chamber is disposed on the conveying device, and is internally provided with a UV lamp for outputting UV-C radiation to generate ozone with a concentration of 30 to 80 ppm, and an exhaust port is provided at the top of the first chamber for discharging a second smell The chamber is disposed on the conveying device after the first chamber, and is internally provided with a cleaning device including a cleaning liquid;

a third chamber is disposed on the conveying device after the second chamber, and is internally provided with a UV lamp for outputting UV-C radiation to generate 30 to 80 ppm of ozone, and a discharge port is provided at the top of the third chamber. For the discharge of ozone;

Passing the shoe component substrate through the conveying device, causing the surface of the shoe component substrate to be activated by ozone in the first chamber for UV-C irradiation to generate an etching effect, and removing surface micro-materials for the cleaning device in the second chamber, And the surface of the shoe component substrate is again subjected to UV-C irradiation in the third chamber to be secondarily activated by ozone to produce an etching effect.

The ultraviolet irradiation system according to claim 10, wherein the shoe component substrate is made of a material selected from the group consisting of rubber, EVA, PU or TPU.

The ultraviolet irradiation system according to claim 10, wherein a drying device is provided at the outlet of the second chamber, the drying device comprises an air knife for outputting a small stream of strong airflow and a plurality of near-infrared heating lamps. The cleaning liquid remaining on the surface of the shoe part is removed by the air knife of the drying device and the near-infrared heat lamp.

The ultraviolet irradiation system of claim 10, further comprising a fourth chamber disposed on the conveying device after the third chamber, wherein the fourth chamber portion is provided with a cleaning device including a cleaning liquid, and A drying device is disposed at the outlet of the fourth chamber, the drying device includes an air knife for outputting a strong airflow of the small strands, and a plurality of near-infrared heating lamps, so that most of the cleaning liquid remaining on the surface of the shoe component passes through the gas of the drying device. The knife and the near-infrared heat lamp are removed.

The ultraviolet irradiation system according to claim 10 or 13, wherein the cleaning liquid is a detergent and/or water, and the cleaning agent is selected from a sulfur-containing buffer, an acid solution or an alkali solution.

The ultraviolet irradiation system according to claim 10 or 13, wherein: the cleaning device is an ultrasonic cleaning device that oscillates the cleaning liquid by outputting an ultrasonic frequency, and ultrasonically removes the shoe component by ultrasonic cleaning. A tiny substance on the surface of the substrate.