KR100891964B1 - Method for preparation of adhesion pad having sticky resin attached thereto - Google Patents

Abstract

A manufacturing method of an adsorption pad is provided to improve the adhesion by hardening the adhesive soft resin on the lower-part of the adsorption pad. A manufacturing method of an adsorption pad comprises: a step of coating the Teflon on a molding frame; a step of putting the molding frame on the pre-processed adsorption pad; a step of bubble-removing the adhesive two part type solution; a step for injecting the adhesive two part type solution into the molding frame; and a step for obtaining the adhesive two part type resin by the molding frame put into a high temperature dryer.

Description

Manufacturing method of adsorption pad with adhesive resin {METHOD FOR PREPARATION OF ADHESION PAD HAVING STICKY RESIN ATTACHED THERETO}

The present invention relates to a tacky soft soft resin that can be used to adhere to an adsorption pad of an adsorption mechanism and a method for fusion and curing of the soft soft resin to an adsorption pad.

Adsorption mechanisms for attaching objects to tiles or glass surfaces and then hanging them are commonly used to fix objects on walls, etc. These adsorption mechanisms have recently been used to secure a cradle such as a navigation system or a monitor. It's happening.

However, most of the adsorption mechanisms currently used exhibit the adsorption force by using the pressure difference between the inside and the outside of the adsorption mechanism. In this case, the outside air pressure changes due to temperature rise or the adsorption pad is lost due to the deformation of the adsorption pad. Therefore, there is a problem that the adsorption mechanism falls off from the skin adhesion surface. In addition, when mounting a rather heavy object such as a navigation or a monitor there is a problem that the adsorption mechanism is not enough enough to slide or fall off the skin adherence over time.

In order to solve the above problem, the applicant attempted to attach a tacky material to the lower surface of the adsorption pad. However, since the adsorption pad has a smooth inert surface as an elastic hard resin, there is a problem in that the physically adherent adhesive material is easily detached, and the conventional adhesive method firmly prevents the adhesive material from falling off the adsorption pad. It was difficult to attach. That is, only the adhesive force of the adhesive material was insufficient adhesion to the adsorption pad. As a result of earnest research to solve this problem, the present inventors have pretreated the adsorption pad with a solution of dilute isocyanate, and then placed the adhesive material and curing it in a high-temperature dryer at a predetermined temperature, whereby the adhesive material is firmly fused and bonded to the adsorption pad. In view of the fact that the present invention was completed.

Accordingly, an object of the present invention is to provide an adhesive urethane soft soft resin that can be used to adhere to the lower surface of an adsorption pad of an adsorption mechanism, and a method of fusion and curing of the soft soft resin to the lower surface of an adsorption pad. Soft soft resin is urethane soft soft resin with adhesive force. The adsorption mechanism having the adsorption pad in which the tacky soft soft resin is fused and cured in accordance with the method of the present invention exhibits enhanced adsorption force due to the interaction of the vacuum adsorption force and the adhesive force, and prevents dropping from the skin adhesion surface.

In order to achieve the object of the present invention, the most important is to prepare a low hardness urethane soft flexible resin excellent in adhesion and heat resistance.

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

Urethane soft flexible resin used in the present invention is composed of a main material and a curing agent, the composition of the main material is 60-90 parts by weight of the first polyol compound having a hydroxyl group at both ends, 10-30 weight of the second polyol compound having three functional groups Parts, 0.1-1.0 parts by weight of a catalyst compound that promotes reaction with a curing agent, 0.2-1 parts by weight of an antioxidant that improves heat resistance, 0.1-1.0 parts by weight of an ultraviolet stabilizer that suppresses aging by ultraviolet rays, and other additives do. In addition, the curing agent is an isocyanate prepolymer, the composition is composed of 20-40 parts by weight of a polyisocyanate compound having two or more functional groups and 50-70 parts by weight of a polyol having a molecular weight of 2000-4000, the NCO content is 3-10% by weight It is preferable. It is preferable that the mixture of a main material and a hardening | curing agent has a molar ratio of 1: 1.0-1: 2.

The urethane soft flexible resin obtained above is fused and cured to the lower surface of the adsorption pad using a dispenser, a mold, and a high temperature dryer to obtain a desired adsorption pad.

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

According to the present invention, since the adhesive soft soft resin is fused and cured on the lower surface of the adsorption pad by using a mold and a high temperature dryer, mass production is possible at the same time according to the number of molds, and the curing time is shortened and the production time is shortened. .

In addition, the present invention by performing a drying at a high temperature using a high-temperature dryer, the adsorption pad and the adhesive soft soft resin is fused and bonded by a chemical action. Therefore, the problem that the adhesive soft soft resin could not be firmly attached by the physical adhesive method due to the surface property of the adsorption pad was solved.

According to the present invention, the adhesive soft soft resin can be firmly fused and cured on the lower surface of the adsorption pad of the adsorption mechanism. Therefore, the adsorption mechanism having the adsorption pad manufactured by the method of the present invention exhibits enhanced adsorption force due to the interaction of the vacuum adsorption force and the tacky soft soft resin, and there is a change in pressure, the adsorption pad is deformed, or a heavy object is fixed. Even in this case, the adsorption mechanism does not easily fall or slip off the skin surface. Therefore, the adsorption mechanism having an adsorption pad in which the tacky soft soft resin is fused and cured by the method of the present invention can be effectively used as an adsorption mechanism for fixing a cradle such as a navigation or a monitor to a glass surface or a dashboard of a vehicle.

The present invention provides a method for fusion and curing the adhesive soft soft resin to the adsorption pad, the method

Coating teflon on the mold;

Placing the mold on the pre-treated adsorption pad;

Vacuum defoaming the tacky two-part solution;

Injecting the two-component solution into a mold;

Placing a mold in which the two-component solution is injected onto a suction pad in a high temperature dryer to cure the two-component solution; And

Pulling out the adsorption pad and the mold, and separating the mold from the adsorption pad

It includes.

In the above method, the adsorption pad is preferably pretreated with an isocyanate (reactor NCO) dilution solution, and the temperature of the high temperature dryer is preferably 40 ° C to 80 ° C.

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

In another embodiment, the base material of the tacky two-component resin used in the method is preferably composed of a polypropylene glycol diol compound having a molecular weight of 2000-3000 and a triol compound having a molecular weight of 3000-6000.

In another embodiment, the main material of the adhesive resin used in the method is that 30-60% by weight of ethylene oxide is added to the polypropylene glycoldiol compound having a molecular weight of 2000-3000 and the triol compound having a molecular weight of 3000-6000. Do.

In another embodiment, the base of the tacky two-part solution is preferably the same as the main component of the adsorption pad.

In another embodiment, the tacky two-part solution preferably consists of a low hardness tacky urethane resin, a hardener and a plasticizer.

In another embodiment, the main component of the tacky two-part solution is 60-90 parts by weight of the first polyol compound having both ends of the hydroxyl group, 10-30 parts by weight of the second polyol compound having three functional groups, and promoting the reaction with the curing agent. It is preferably composed of 0.1-1.0 parts by weight of a catalyst compound, 0.2-1 parts by weight of an antioxidant to improve heat resistance, 0.1-1.0 parts by weight of an ultraviolet stabilizer that suppresses aging by ultraviolet rays, and other additives.

In addition, the curing agent of the two-component solution of the present invention is composed of 20-40 parts by weight of a polyisocyanate compound having two or more functional groups and 50-70 parts by weight of a polyol having a molecular weight of 2000-4000, the NCO content is 3-10% by weight Preference is given to isocyanate prepolymers. It is preferable that the mixture of a main material and a hardening | curing agent has a molar ratio of 1: 1.0-1: 2.

In the present invention, in order to effectively adhere the adhesive soft flexible resin to the lower surface of the adsorption pad, after the adsorption pad is preferably pretreated with an isocyanate diluent solution having an NCO reactor, the adhesive soft soft resin solution of a specific composition is disposed, and The soft soft resin solution is cured in a dryer.

Adsorption pads are generally produced by injection molding, and in the case of producing adsorption pads by injection molding, it has not been practically possible to manufacture adhesive soft soft resins integrally with adsorption pads in the injection molding process. As a method for attaching the adhesive soft flexible resin to the adsorption pad, it is conceivable to attach the adhesive soft flexible resin solution to the adsorption pad by its own adhesive force or by using an adhesive in a further step. However, since this is merely physical attachment, a problem arises that the adhesion is weak and easily dropped. In general, since the adsorption pad is a hard resin and has a smooth inert surface, the adhesion is limited only by physical adhesion. In general, when the soft soft resin solution is cured at room temperature, only physical adhesion occurs between the surface and the soft soft resin, so that this problem cannot be solved.

In the present invention, the adsorption pad is preferably pretreated with an isocyanate dilution solution having an NCO reactor, and then a two-component solution composed of a tacky soft soft resin is placed, and the adsorption pad is placed in a high temperature dryer at a constant temperature and cured. The liquid soft resin solution may be cured while being fused with the adsorption pad. This is thought to be not simply a physical attachment, but a bond caused by the chemical reaction between the adsorption pad and the two-part solution. This phenomenon does not occur at room temperature curing, and since the hard adsorption pad deteriorates when the temperature is out of an appropriate range, it is important to cure at an appropriate temperature.

According to the present invention, the adhesive soft soft resin is fused and cured on the adsorption pad, and may be attached with strong bonding force. In the present invention, the adhesive soft soft resin is obtained by curing a two-component solution mainly composed of a polymer compound exhibiting adhesive force in the form of a soft soft resin. This adhesive soft soft resin shows adhesive force with respect to a skin adhesion surface. Therefore, when the adsorption pad to which the adhesive soft soft resin is fused and cured is used as the suction plate of the adsorption mechanism, strong adsorption force to the skin adhesion surface can be expected due to the interaction between the vacuum adsorption force and the adhesive soft soft resin. Moreover, what is necessary is just to manufacture and use a mold mold according to the shape of the adhesive soft soft resin to form on a suction pad.

Now, a method of fusion and curing the tacky soft soft resin on the adsorption pad will be described in detail.

The present invention relates to a method for fusion and curing the soft soft resin on the lower surface of the adsorption pad. In the present invention, the lower surface of the adsorption pad refers to a surface attached to a wall surface or a glass surface of the adsorption pad, and the soft soft resin is a two-component solution composed of an adhesive polymer compound. The adhesive soft resin is fused and cured to the lower surface of the adsorption pad.

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

In the present invention, a mold is used to fuse and cure the two-component solution to the lower surface of the adsorption pad. The shape of the mold may vary depending on the shape of the suction pad.

In general, when the adsorption pad is circular, the mold is preferably annular. Specifically, in the present invention, the mold is a hollow tubular shape having a height and a width. A groove may be dug along the inner circumference of the mold on either side of the top or bottom of the mold, which serves to engage the mold and the suction pad. The groove may cover the entire inner circumference or may cover a portion.

By the shape of the mold, the shape of the adhesive soft soft resin fused to the adsorption pad is determined.

In addition, the shape and dimensions of the mold can be changed according to the shape and size of the adsorption pad, it will be apparent that it can be used in various forms as necessary.

Teflon is coated on the mold described above. Coating teflon on the mold is intended to facilitate separation of the tacky soft soft resin after curing. The first step of the invention is to coat teflon on the mold.

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

The adsorption pad is a pad used as a suction plate attached to a wall surface or a glass surface in the adsorption mechanism, and may be molded into an adsorption pad using an elastic polymer compound. The molded adsorption pad is a hard resin. The adsorption pad is pretreated with a dilute isocyanate solution and the mold is placed thereon.

In a third step of the process of the invention, the two-part solution is vacuum degassed.

In the present invention, the two-component solution refers to a solution that forms a tacky soft soft resin by curing. The two-part solution consists of a host, a hardener and a plasticizer. As a main component of the two-component solution, a tacky polymer compound may be used, and a curing agent and a plasticizer may be those used generally for curing the polymer compound. In addition, the cured tacky soft soft resin should be softer than the adsorption pad.

In the present invention, preferably, the two-component solution, that is, the adhesive soft soft resin solution, may have the same main component as the main component of the adsorption pad. The elastic polymer compound forming the adsorption pad generally has adhesiveness, and the adhesiveness and hardness are determined according to the amount of the curing agent and the plasticizer. Pretreatment of the adsorption pad with a solution of dilute isocyanate prevents the main component of the two-component solution and the main components of the adsorption pad from melting and binding together by chemical action when the two-component solution is fused and cured in the high temperature dryer. In addition, the two-part solution can be more firmly fused to the adsorption pad. As an example of the two-component solution, in an adsorption pad made of polyurethane as a main component, the two-component solution may contain a low hardness tacky urethane resin, a polyisocyanate curing agent, and a plasticizer as main materials.

In one embodiment, the adhesive two-component resin is preferably a thermosetting two-component resin composed of polyurethane, and has a hardness of 20 (Shore A type) or less. In another embodiment, the base of the tacky two-component resin consists of a polypropylene glycol diol compound having a molecular weight of 2000-3000 and a triol compound having a molecular weight of 3000-6000. In another embodiment, the adhesive resin is based on the addition of 30-60% by weight of ethylene oxide to a polypropylene glycol diol compound having a molecular weight of 2000-3000 and a triol compound having a molecular weight of 3000-6000. In a further embodiment, the base of the tacky two-part solution is preferably 60-90 parts by weight of a first polyol compound having both ends of a hydroxyl group, 10-30 parts by weight of a second polyol compound having three functional groups, reaction with a curing agent. 0.1-1.0 parts by weight of a catalyst compound that promotes heat treatment, 0.2-1 parts by weight of an antioxidant that improves heat resistance, 0.1-1.0 parts by weight of an ultraviolet stabilizer that suppresses aging by ultraviolet rays, and other additives. In addition, the curing agent of the two-component solution of the present invention preferably consists of 20-40 parts by weight of a polyisocyanate compound having two or more functional groups and 50-70 parts by weight of a polyol having a molecular weight of 2000-4000, with an NCO content of 3-10 parts by weight. % Isocyanate prepolymer. The formulation of the main material and the curing agent preferably has a molar ratio of 1: 1.0-1: 2.

In addition, in the third step, the two-component solution is vacuum degassed and then injected into the mold, thereby preventing the inflow of air when the two-component solution is injected into the mold.

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

Specifically, the two-component solution is injected between the molds disposed on the adsorption pad.

In the fifth step of the method of the present invention, the mold containing the two-component solution is injected into the hot dryer in a state where it is placed on the suction pad to cure the two-component solution.

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 in a high temperature dryer at a temperature of 40 to 80 ° C. If the temperature is less than 40 ° C., the fusion of the adsorption pad and the two-component solution may not be sufficient. If the temperature is more than 80 ° C., the adsorption pad may deteriorate and shape or physical properties may change. In the present invention, the high temperature dryer hardens the chemical reaction at the interface between the adsorption pad and the two-component solution, thereby curing the two-component solution with the adsorption pad. Therefore, the two-part solution is strongly fused and bonded to the adsorption pad, so that it is not easily dropped.

In addition, by using a high temperature dryer, the curing time is considerably shorter than when the soft soft resin solution, that is, the two-component solution, is cured at room temperature. In the case of room temperature curing, the soft soft resin solution generally took about 48 hours to cure, but in the high temperature dryer, the curing of the tacky soft soft resin was completed within 30 minutes, preferably in a curing time of 3 to 30 minutes.

Finally, in the sixth step of the present invention, the adsorption pad and the mold are taken out from the high temperature dryer, and the mold is separated from the adsorption pad. Thereby, adhesive soft soft resin is formed in the outer peripheral part of the lower surface of a suction pad. This adhesive soft soft resin is excellent in the adhesive force to the adsorption pad, and is not easily dropped, and the adhesive force to the skin adhesion surface is also very excellent. In addition, there is an advantage that the adhesion marks do not remain on the skin adhesion surface compared to such excellent adhesion.

Conventionally, in injection molding of the adsorption pad, it was impossible to attach the adhesive soft soft resin to the adsorption pad in an integrated manner, and the adhesion was weak when the adhesive pad was attached in an additional step. However, in the present invention, after the adsorption pad is pretreated with an isocyanate dilution solution, the adhesive resin solution having a specific composition is disposed and dried in a high temperature dryer, thereby making it possible to firmly adhere the adhesive soft soft resin to the adsorption pad. In addition, since the adhesive soft flexible resin solution is cured in a high temperature dryer, since the adsorption pad and the adhesive soft soft resin solution are fused and cured at the interface, the adhesive soft soft resin is chemically bonded to the adsorption pad and is not easily dropped. Therefore, if the adsorption pad in which the tacky soft soft resin is fused and cured by the method of the present invention is used in the adsorption mechanism, even when a heavy object is placed, it can be effectively used without separating the tacky soft soft resin and the adsorption pad, and the vacuum Due to the interaction between the adsorption force and the adhesive force, the adsorption force on the skin adhesion surface of the adsorption mechanism is also enhanced.

By the adsorption mechanism using the adsorption pad which the adhesive soft soft resin fused and hardened by the method of this invention, the part which fixed by double-sided tape or a screw etc. to an automobile dashboard or a tile with an uneven | corrugated adhesive force without such an auxiliary means And only by the vacuum suction force. Moreover, the adsorption pad manufactured by the method of the present invention in which the adhesive soft soft resin is fused and cured on the lower surface does not leave a trace on the skin adhered surface, and maintains the original state of the adhesive soft soft resin as it is. Therefore, the adsorption pad manufactured by the method of the present invention, in which the adhesive soft soft resin is fused and cured on the lower surface, can be reused without leaving any damage or trace on the skin adhesion surface.

Furthermore, in the present invention, by using a plurality of molds, it is possible to simultaneously attach the adhesive soft soft resin to the multiple adsorption pads, thereby making it possible to mass-produce the adsorption pads with the adhesive soft soft resins attached thereto.

In addition, by the method of the present invention by vacuum degassing and injecting the two-component solution cured with a tacky soft soft resin, no air is introduced during the solution injection, it can be recognized as a high-quality product without appearance defects after curing.

Claims (16)

As a method of manufacturing an adhesive pad with a tacky resin, by combining the vacuum adsorption force and the adhesive force so that the adsorption pad is deformed after a period of time so that the adsorption force is lowered. Coating teflon on the mold; Placing the mold on the pre-treated adsorption pad; Vacuum defoaming the tacky two-part solution; Injecting the two-component solution into a mold; Placing a mold in which the two-component solution is injected onto a suction pad in a high temperature dryer to cure the two-component solution to obtain a tacky two-component resin; And Withdrawing the mold from the suction pad and separating the mold from the suction pad, The main ingredient of the adhesive two-component resin comprises a polypropylene glycol diol compound having a molecular weight of 2000-3000 and a triol compound having a molecular weight of 3000-6000. The method according to claim 1, wherein the pretreatment agent for the pretreatment of the adsorption pad is a solution obtained by diluting isocyanate (reactor NCO). The method of claim 1 wherein the adsorption pad is based on an elastomeric compound. The method according to any one of claims 1 to 3, wherein the main body of the tacky two-part solution is the same as the main component of the adsorption pad. The method according to any one of claims 1 to 3, wherein the tacky two-component solution consists of a low hardness tacky urethane resin, a curing agent, and a plasticizer. The method according to any one of claims 1 to 3, wherein the adhesive two-component resin is a thermosetting two-component resin composed of polyurethane, and has a hardness of 20 (Shore A type) or less. delete The method according to any one of claims 1 to 3, wherein the main ingredient of the tacky two-component resin further contains 30 to 60% by weight of ethylene oxide. The main body of the viscous two-part solution is 60-90 parts by weight of a first polyol compound having both ends of a hydroxyl group, and 10-30 parts by weight of a second polyol compound having three functional groups. It is composed of 0.1-1.0 parts by weight of the catalyst compound for promoting the reaction with the curing agent, 0.2-1 parts by weight of the antioxidant for improving the heat resistance, 0.1-1.0 parts by weight of the UV stabilizer for suppressing aging by ultraviolet rays, and additives Characterized in that the method. The curing agent of the adhesive two-part solution is composed of 20-40 parts by weight of a polyisocyanate compound having two or more functional groups and 50-70 parts by weight of a polyol having a molecular weight of 2000-4000. , NCO content is 3-10% by weight. The method according to any one of claims 1 to 3, wherein the tacky two-component resin further comprises a curing agent, wherein the mixing of the main material and the curing agent has a molar ratio of 1: 1.0-1: 2. The method according to any one of claims 1 to 3, wherein the tacky two-part solution is fused and cured with a tacky soft soft resin on an adsorption pad. The method according to any one of claims 1 to 3, wherein the temperature of the high temperature dryer is 40 to 80 ° C. The method according to any one of claims 1 to 3, wherein the curing time is from 3 minutes to 30 minutes. The method according to any one of claims 1 to 3, wherein air is not introduced into the tacky soft soft resin by vacuum degassing the tacky two-component solution. The method according to any one of claims 1 to 3, wherein the mold is coated with teflon so that the soft soft resin is easily separated from the mold and the scratches are not scratched.