JP2011526551A - Method for manufacturing suction pad with adhesive resin attached - Google Patents

Abstract

The present invention relates to a method for manufacturing a suction pad to which an adhesive resin used in a suction mechanism is attached.
The method includes the steps of coating a mold with Teflon (registered trademark); placing the Teflon (registered trademark) coated mold on a pretreated suction pad; and vacuum degassing the adhesive two-part solution. A step of injecting the two-component solution into a mold; a step of placing the template into which the two-component solution has been injected in a high-temperature dryer while being placed on an adsorption pad and curing the two-component solution And pulling out the suction pad and the mold and separating the mold from the suction pad. According to the present invention, by adhering and curing the adhesive soft resin to the lower surface of the adsorption pad of the adsorption mechanism, the adsorption mechanism exhibits enhanced adsorption force due to the action of the adhesive soft resin on the adherend surface, and the pressure Even when there is a change in the position, the suction pad is deformed, or a heavy object is fixed, the suction mechanism does not easily come off or slide off from the adherend surface.

Description

  The present invention relates to an adhesive soft resin used for attaching to a suction pad of a suction mechanism, and a method for fusing and curing the soft resin to the suction pad.

  In order to fix an object on a wall or the like, a suction mechanism for attaching an object after being attached to a tile or glass surface has been widely used. The fact is that its use has been expanded to the purpose of fixing the stationary table.

  However, most of the adsorption mechanisms that are currently used use the pressure difference between the inside and outside of the adsorption mechanism to exert the adsorption force. In this case, the external air pressure changes due to temperature rise or the like, or adsorption When the pad is deformed, the suction force is lost, and accordingly, there is a problem that the suction mechanism is detached from the adherend surface. In addition, when a somewhat heavy object such as a navigation or a monitor is deferred, there is a problem that the suction force is not sufficient, and the suction mechanism slides off or comes off from the adherend surface over time.

  In order to solve the above problem, the present applicant has attempted to attach a sticky substance to the lower surface of the suction pad. However, since the adsorption pad has a smooth inert surface made of an elastic hard resin, there is a problem that the adhesive substance that is simply physically attached can easily fall off. It was difficult to attach firmly so that the sex substances would not fall out. That is, the adhesive force to the suction pad was insufficient only with the adhesive force of the adhesive substance. As a result of diligent research to solve this problem, the present applicant has pretreated the adsorption pad with a solution diluted with an isocyanate, and then placed an adhesive substance and cured it in a high-temperature drier at a constant temperature. Thus, the present inventors have found the fact that the adhesive substance is tightly fused and bonded to complete the present invention.

  Therefore, an object of the present invention is to provide an adhesive urethane soft resin used for attaching to the lower surface of the suction pad of the suction mechanism, and a method for fusing and curing the soft resin on the lower surface of the suction pad. The soft resin is a urethane soft resin having adhesive strength. The adsorption mechanism having an adsorption pad in which an adhesive soft resin is fused and cured according to the method of the present invention exhibits enhanced adsorption force due to the interaction between the vacuum adsorption force and the adhesion force. Dropping is prevented.

  In order to achieve the object of the present invention, the most important thing is to produce a low-hardness urethane soft resin excellent in adhesive strength and heat resistance.

  Accordingly, a first object of the present invention is to provide a low-hardness urethane soft resin excellent in adhesive strength and heat resistance.

  The urethane soft resin used in the present invention is composed of a main agent and a curing agent. The composition of the main agent is 60 to 90 parts by weight of a first polyol compound having both hydroxyl groups at both ends, and three functional groups. 10 to 30 parts by weight of second polyol compound, 0.1 to 1.0 part by weight of catalyst compound for promoting reaction with curing agent, 0.2 to 1 part by weight of antioxidant for improving heat resistance, aging by ultraviolet rays Is comprised of 0.1 to 1.0 part by weight of an ultraviolet stabilizer that suppresses UV and other additives. Further, the curing agent is an isocyanate prepolymer, and its composition is composed of 20 to 40 parts by weight of a polyisocyanate compound having two or more functional groups and 50 to 70 parts by weight of a polyol having a molecular weight of 2000 to 4000. The NCO group content is preferably 3 to 10% by weight. The main agent and the curing agent are preferably blended in a molar ratio of 1: 1.0 to 1: 2.

  When the urethane soft resin obtained above is fused and cured to the lower surface of the suction pad using a dispenser, a mold and a high-temperature dryer, a desired suction pad can be obtained.

  Accordingly, a second object of the present invention is to provide a method for fusing and curing an adhesive gel on the lower surface of a suction pad using a mold and a high-temperature dryer.

  In the present invention, the adhesive soft resin is fused and cured to the lower surface of the suction pad using a mold and a high-temperature dryer, so that mass production is possible simultaneously with a plurality of molds, and the curing time is shortened and the manufacturing time is reduced. Is shortened.

  Furthermore, in the present invention, the suction pad and the adhesive soft resin are fused and bonded by a chemical reaction by drying at a high temperature using a high-temperature dryer. Therefore, due to the surface properties of the suction pad, the problem that the sticky soft resin was not firmly attached by the physical bonding method was solved.

  According to the present invention, the adhesive soft resin can be firmly fused and cured on the lower surface of the suction pad of the suction mechanism. Therefore, the adsorption mechanism having the adsorption pad manufactured by the method of the present invention exhibits an enhanced adsorption force due to the interaction between the vacuum adsorption force and the adhesive soft resin, whether there is a change in pressure, Even when it is deformed or a heavy object is fixed, the suction mechanism does not easily come off or slide off from the surface to be adhered. Therefore, an adsorption mechanism having an adsorption pad in which an adhesive soft resin is fused and cured by the method of the present invention is an adsorption mechanism for fixing a stationary table such as a navigation or a monitor to a glass surface of a vehicle or a dashboard. It is effectively used as

The present invention provides a method for manufacturing a suction pad in which an adhesive soft resin is fused and cured to the suction pad, and the manufacturing method includes:
Coating the mold with Teflon;
Placing the mold on a pretreated suction pad;
Vacuum degassing the sticky two-part solution;
Injecting the two-part solution into a mold;
Placing the mold into which the two-component solution has been poured while placed on the suction pad into a high-temperature dryer to cure the two-component solution; and pulling out the suction pad and the template, and then casting the template from the suction pad. The step of separating is included.

  Further, in the above method, the adsorption pad is preferably pretreated with a dilute solution of isocyanate (having an NCO reactive group), and the temperature of the high-temperature dryer is preferably 40 ° C. to 80 ° C.

  Furthermore, in a specific example, the adhesive two-component resin is a thermosetting two-component resin made of polyurethane, and preferably has a hardness of 20 (Shore A type) or less.

  In another specific example, the main component of the adhesive two-component resin used in the above method is preferably composed of a polypropylene glycol diol compound having a molecular weight of 2000 to 3000 and a triol compound having a molecular weight of 3000 to 6000.

  In still another specific example, the main component of the adhesive resin used in the above method is a polypropylene glycol diol compound having a molecular weight of 2000 to 3000 and a triol compound having a molecular weight of 3000 to 6000 with addition of 30 to 60% by weight of ethylene oxide. It is preferred that

  In another specific example, the main component of the adhesive two-component solution is preferably the same as the main component of the suction pad.

  In another specific example, the adhesive two-part solution is preferably composed of a low-hardness adhesive urethane resin, a curing agent, and a plasticizer.

  In still another specific example, the main component of the adhesive two-component solution is 60 to 90 parts by weight of the first polyol compound having both hydroxyl groups at both ends, and the second polyol compound having 10 to 30 functional groups. 0.1 part by weight of a catalyst compound that accelerates the reaction with the curing agent, 0.2 to 1 part by weight of an antioxidant that improves heat resistance, and an ultraviolet stabilizer that suppresses aging by ultraviolet rays. It is preferable to be comprised with 1-1.0 weight part and another additive.

  Furthermore, the curing agent of the two-component solution of the present invention is composed of 20 to 40 parts by weight of a polyisocyanate compound having two or more functional groups and 50 to 70 parts by weight of a polyol having a molecular weight of 2000 to 4000. An isocyanate prepolymer having a group content of 3 to 10% by weight is preferred. The main agent and the curing agent are preferably blended in a molar ratio of 1: 1.0 to 1: 2.

  In the present invention, in order to effectively attach the adhesive soft resin to the lower surface of the adsorption pad, preferably, after the adsorption pad is pretreated with an isocyanate diluted solution having an NCO reactive group, an adhesive soft resin solution having a specific composition is added. It arrange | positions and hardens a soft resin solution with a high temperature dryer, It is characterized by the above-mentioned.

  The suction pad is usually produced by injection molding. When the suction pad is produced by injection molding as described above, it is actually impossible to manufacture the adhesive soft resin integrally with the suction pad in the injection molding process. It was. One method for attaching the tacky soft resin to the suction pad is to attach the tacky soft resin solution to the suction pad by its own adhesive force or using an adhesive in an additional step. However, since this is merely a physical attachment, there is a problem that the adhesive force is weak and it easily drops off. This is because the suction pad is usually made of hard resin and has a smooth inert surface, so that the adhesive force is limited only by physical attachment. Usually, when the soft resin solution is cured at room temperature, only physical attachment occurs between the surface and the soft resin, and thus this problem cannot be solved.

  In the present invention, the adsorption pad is preferably pretreated with an isocyanate diluted solution having an NCO reactive group, and then a two-part solution that becomes a sticky soft resin is placed, and the adsorption pad is placed in a high-temperature dryer at a constant temperature. In order to cure, the two-pack type soft resin solution can be cured while being fused with the suction pad. This is not simply a physical attachment, but is considered to be a bond caused by a chemical reaction between the adsorption pad and the two-part solution. Such a phenomenon does not occur at room temperature curing, and if the temperature deviates from an appropriate range, the hard suction pad will be deteriorated. Therefore, it is important to cure at an appropriate temperature.

  According to the present invention, the adhesive soft resin can be fused and cured on the suction pad and attached with a strong bonding force. In the present invention, the adhesive soft resin is obtained by curing a two-component solution mainly composed of a polymer compound exhibiting adhesive strength in the form of a soft resin. This adhesive soft resin shows adhesive force with respect to a to-be-adhered surface. Therefore, when a suction pad to which an adhesive soft resin is fused and cured is used as the suction cup of the suction mechanism, a strong suction force against the adherend surface due to the interaction between the vacuum suction force and the adhesive soft resin. Can be expected. In addition, what is necessary is just to manufacture and use a casting_mold | template along the shape of the adhesive soft resin which is going to form in a suction pad.

  Hereinafter, a method for fusing and curing the adhesive soft resin to the suction pad will be described in detail.

  The present invention relates to a method for fusing and curing a soft resin on the lower surface of a suction pad. In the present invention, the “lower surface of the suction pad” refers to a surface attached to the wall surface or glass surface of the suction pad, and the “soft resin” refers to a cured two-component solution made of an adhesive polymer compound. Say. The adhesive soft resin is attached to the lower surface of the suction pad by being fused and cured.

  In the first step of the method of the present invention, the mold is coated with Teflon.

  The present invention is characterized in that a mold is used to fuse and cure the two-component solution to the lower surface of the suction pad. The shape of the mold varies depending on the shape of the suction pad.

  Usually, when the suction pad is circular, the mold preferably has an annular shape. Specifically, in the present invention, the mold is a hollow tube having a height and a width. A groove may be provided on either one of the upper surface and the lower surface of the mold along the inner peripheral portion of the mold, but this functions to well mesh the mold and the suction pad. The groove may extend over the entire inner peripheral portion or may extend over a portion.

  The shape of the adhesive soft resin fused to the suction pad is determined by the shape of the mold.

  It should be noted that the shape and dimensions of the mold vary depending on the shape and size of the suction pad, and it is obvious that various shapes can be used as necessary.

  The above mold is coated with Teflon (registered trademark). The reason why Teflon (registered trademark) is coated on the mold is to facilitate separation of the adhesive soft resin after curing. The first step of the present invention is to coat the mold with Teflon.

  In the second step of the method of the present invention, the adsorption pad is pretreated with a dilute solution of isocyanate, and then a mold is placed on the pretreated adsorption pad.

  The suction pad is a pad that is used as a suction cup that is attached to a wall surface, glass surface, or the like by a suction mechanism, and may be formed as a suction pad using an elastic polymer compound. The formed suction pad is a hard resin. The adsorption pad is pretreated with a dilute solution of isocyanate and a mold is placed thereon.

  In the third step of the method of the present invention, the two-component solution is vacuum degassed.

  In the present invention, the two-part solution refers to a solution that forms an adhesive soft resin by curing. The two-component solution consists of a main agent, a curing agent and a plasticizer. As the main component of the two-component solution, an adhesive polymer compound is used, and as the curing agent and plasticizer, those usually used for curing of the polymer compound can be used. Furthermore, the cured tacky soft resin must be softer than the suction pad.

  In the present invention, preferably, the two-component solution, that is, the adhesive soft resin solution, may have the same main component as the main component of the suction pad. The elastic polymer compound forming the suction pad usually has adhesiveness, and the adhesiveness and hardness are determined by the amount of the curing agent and the plasticizer. When the adsorption pad is pretreated with a dilute solution of isocyanate, the main component of the two-component solution and the main component of the adsorption pad are mixed when the two-component solution is fused and cured to the lower surface of the adsorption pad in a high-temperature dryer. The two-part solution can be more tightly fused to the adsorption pad, assisting in melting and bonding to each other by chemical reaction. As an example of a two-component solution, in a suction pad manufactured using polyurethane as a main component, the two-component solution can contain a low-hardness adhesive urethane resin, a polyisocyanate curing agent, and a plasticizer as main components.

  In one specific example, preferably, the adhesive two-component resin is a thermosetting two-component resin made of polyurethane and has a hardness of 20 (Shore A type) or less. In another specific example, the main component of the adhesive two-part resin is composed of a polypropylene glycol diol compound having a molecular weight of 2000 to 3000 and a triol compound having a molecular weight of 3000 to 6000. In still another specific example, the main component of the adhesive resin is a polypropylene glycol diol compound having a molecular weight of 2000 to 3000 and a triol compound having a molecular weight of 3000 to 6000 with addition of 30 to 60% by weight of ethylene oxide. . In a further specific example, the main component of the adhesive two-component solution is preferably 60 to 90 parts by weight of the first polyol compound having both hydroxyl groups at both ends, and the second polyol compound having 10 functional groups. 30 parts by weight, 0.1 to 1.0 parts by weight of a catalyst compound for promoting reaction with a curing agent, 0.2 to 1 part by weight of an antioxidant for improving heat resistance, and an ultraviolet stabilizer for suppressing aging by ultraviolet rays 0 0.1 to 1.0 part by weight, and other additives. Further, the curing agent of the two-component solution of the present invention preferably comprises 20 to 40 parts by weight of a polyisocyanate compound having two or more functional groups and 50 to 70 parts by weight of a polyol having a molecular weight of 2000 to 4000. And an isocyanate prepolymer having an NCO group content of 3 to 10% by weight. The main agent and the curing agent are preferably blended in a molar ratio of 1: 1.0 to 1: 2.

  Further, in the third step, the two-component solution is vacuum degassed and then injected into the mold, whereby the inflow of air when the two-component solution is injected into the template can be blocked.

  In the fourth step of the method of the present invention, a two-part solution is injected into the mold.

  Specifically, a two-component solution is injected between the molds arranged on the suction pad.

  In the fifth step of the method of the present invention, the mold into which the two-component solution has been injected is placed in a high-temperature dryer while being placed on the suction pad, and the two-component solution is cured.

  In the present invention, a high-temperature dryer is used for curing the two-component solution. Specifically, the two-component solution in the mold is cured with a high-temperature dryer at 40 ° C to 80 ° C. If the temperature is less than 40 ° C., the adsorption pad and the two-component solution are not sufficiently fused, and if the temperature exceeds 80 ° C., the adsorption pad may deteriorate and the shape and physical properties may change. In the present invention, such a high-temperature dryer curing causes a chemical reaction at the interface where the adsorption pad and the two-component solution are in contact, and the two-component solution is cured while being fused to the adsorption pad. Become. Therefore, the two-component solution is strongly fused and bonded to the suction pad, and does not easily fall off.

  In addition, by using a high-temperature dryer, the curing time is significantly shortened compared with the case where a soft resin solution, that is, a two-component solution is cured at room temperature. When curing at room temperature, it usually took about 48 hours to cure the soft resin solution, but in the high-temperature dryer, the curing of the adhesive soft resin was completed within 30 minutes, preferably 3 to 30 minutes. did.

  Finally, in the sixth step of the present invention, the suction pad and the mold are pulled out from the high-temperature dryer, and the mold is separated from the suction pad. Thereby, an adhesive soft resin is formed on the outer peripheral portion of the lower surface of the suction pad. The adhesive soft resin has an excellent binding force to the suction pad and does not easily fall off, and also has an excellent adhesive force to the adherend surface. Furthermore, while having such an excellent adhesive force, there is an advantage that an adhesion mark or the like does not remain on the adherend surface.

  Conventionally, it has been impossible to integrate and attach the adhesive soft resin to the suction pad at the time of injection molding of the suction pad, and when attaching by an adhesion method in an additional step, the adhesive force was weak. However, in the present invention, after the adsorption pad is pretreated with an isocyanate diluted solution, an adhesive resin solution having a specific composition is placed and dried by a high-temperature dryer, so that the adhesive soft resin is firmly attached to the adsorption pad. It became possible. Furthermore, by curing the adhesive soft resin solution with a high-temperature dryer, the adhesive pad and the adhesive soft resin solution are cured while being fused at the interface, so the adhesive soft resin is chemically bonded to the adsorption pad. And it doesn't fall off easily. Therefore, when the suction pad in which the adhesive soft resin is fused and cured by the method of the present invention is used for the suction mechanism, the adhesive soft resin and the suction pad are not separated even when a heavy object is left stationary. It can be used effectively, and has an effect of strengthening the suction force on the adherend surface of the suction mechanism by the interaction between the vacuum suction force and the adhesive force.

  The part fixed with double-sided tape or screws to the dashboard or uneven tile of an automobile by an adsorption mechanism using an adsorption pad in which the adhesive soft resin produced by the method of the present invention is fused and cured is used. Even if there is no such auxiliary means, it can be effectively attached only by the adhesive force and the vacuum suction force. Further, the suction pad in which the adhesive soft resin is fused and cured to the lower surface manufactured by the method of the present invention does not leave a mark on the adherend surface and maintains the original state of the adhesive soft resin. Therefore, the suction pad obtained by fusing and curing the adhesive soft resin on the lower surface manufactured by the method of the present invention can be reused without leaving any scratches or marks on the adherend surface.

  Furthermore, in the present invention, by using a plurality of molds, it is possible to simultaneously attach an adhesive soft resin to a plurality of adsorption pads, thereby making it possible to mass produce adsorption pads to which an adhesive soft resin is attached. It is.

  Furthermore, depending on the method of the present invention, after the two-part solution that is cured to the adhesive soft resin is vacuum degassed and then injected, air does not flow in when the solution is injected. It can be recognized as a high-quality product without defects.

Claims (15)

By combining vacuum suction force and adhesive force, even if the suction pad is deformed after a lapse of time and the suction force is reduced, the suction force is maintained by the adhesive force and is attached to the adhesive resin. A method for manufacturing a pad, comprising:
Coating the mold with Teflon;
Placing the mold on a pretreated suction pad;
Vacuum degassing the sticky two-part solution;
Injecting the two-part solution into a mold;
Placing the mold into which the two-component solution has been poured into a high-temperature dryer while being placed on the adsorption pad, curing the two-component solution to obtain an adhesive two-component resin; and an adsorption pad; Withdrawing the mold and separating the mold from the suction pad,
The main component of the adhesive two-component resin is composed of a polypropylene glycol diol compound having a molecular weight of 2000 to 3000 and a triol compound having a molecular weight of 3000 to 6000. Production method.   The method for producing a suction pad to which an adhesive resin is attached according to claim 1, wherein the pretreatment agent for pretreatment of the suction pad is a solution obtained by diluting isocyanate (reactive group NCO).   The method of manufacturing a suction pad to which the adhesive resin according to claim 1 is attached, wherein the suction pad uses an elastic polymer compound as a base material.   The manufacturing method of the suction pad to which the adhesive resin according to any one of claims 1 to 3 is attached, wherein the main component of the adhesive two-component solution is the same as the main component of the suction pad. Method.   The adhesive two-component solution is composed of a low-hardness adhesive urethane resin, a curing agent, and a plasticizer, and the adsorption to which the adhesive resin according to any one of claims 1 to 3 is attached. A method for manufacturing a pad.   4. The adhesive two-part resin is a thermosetting two-part resin made of polyurethane, and has a hardness of 20 (Shore A type) or less. Method of manufacturing a suction pad to which an adhesive resin is attached.   The main component of the adhesive two-component resin further contains 30 to 60% by weight of ethylene oxide. The suction pad to which the adhesive resin according to any one of claims 1 to 3 is attached. Production method.   The main component of the adhesive two-component solution is 60 to 90 parts by weight of a first polyol compound having both hydroxyl groups at both ends, 10 to 30 parts by weight of a second polyol compound having three functional groups, and a curing agent. 0.1 to 1.0 part by weight of catalyst compound for promoting reaction, 0.2 to 1 part by weight of antioxidant for improving heat resistance, 0.1 to 1.0 part by weight of ultraviolet stabilizer for suppressing aging by ultraviolet rays The method for manufacturing a suction pad to which the adhesive resin according to any one of claims 1 to 3 is attached.   The curing agent of the adhesive two-component solution is composed of 20 to 40 parts by weight of a polyisocyanate compound having two or more functional groups and 50 to 70 parts by weight of a polyol having a molecular weight of 2000 to 4000, and the content of NCO groups The method for manufacturing a suction pad to which the adhesive resin according to any one of claims 1 to 3 is attached.   The adhesive two-component resin further contains a curing agent, and the main agent and the curing agent are blended in a molar ratio of 1: 1.0 to 1: 2. The manufacturing method of the suction pad to which the adhesive resin of any one of Claims 1 was attached.   4. Adsorption with attached adhesive resin according to any one of claims 1 to 3, wherein the adhesive two-component solution is fused and cured to an adhesive soft resin on an adsorption pad. A method for manufacturing a pad.   The method for producing a suction pad to which an adhesive resin is attached according to any one of claims 1 to 3, wherein the temperature of the high-temperature dryer is 40 ° C to 80 ° C.   The method for producing a suction pad to which an adhesive resin is attached according to any one of claims 1 to 3, wherein the curing time is 3 minutes to 30 minutes.   The adhesive resin according to any one of claims 1 to 3, wherein air does not flow into the adhesive soft resin by vacuum degassing the adhesive two-component solution. Manufacturing method of suction pad.   The hard resin is easily separated from the adhesive mold by coating the mold with Teflon (registered trademark), and the cured resin is not damaged. A method for producing a suction pad to which the adhesive resin according to any one of 3 is attached.