JP2000053452A - Production of safety glass - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a producing method of safety glass having high shock resistance and high transparency. SOLUTION: A transparent plastic joining chip is produced by mixing a source material such as polyurethane, acrylic and epoxy resins, and the obtd. joining chip is laminated between a reinforced glass and PE or PET. The laminated body is gradually pressurized to a specified pressure in a vacuum high pressure furnace and then kept at this pressure for a specified time. Then the pressure in the furnace is gradually reduced and the glass is taken out to produce safety glass having firm bonding force and high transparency by the effect of high pressure and characteristics of the material of the joining chip.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a safety glass, which comprises mixing a raw material such as polyurethane, acrylic and epoxy resin to produce a transparent plastic joint piece, and joining the joint piece with tempered glass. After sandwiching with polycarbonate or polyester, gradually pressurizing in a vacuum high-pressure furnace to a constant pressure and pressurizing for a certain period of time, gradually reducing the pressure in the furnace and taking out, a method of obtaining safety glass, Due to the characteristics of the joint piece, it has strength against breakage due to external force and is safe.In addition, it is possible to manufacture safety glass with greatly increased overall clarity, and the transparency generated by the conventional adhesive manufacturing method The present invention relates to a method for manufacturing safety glass that can solve the problem of defects.

[0002]

2. Description of the Related Art Safety glass is used as a material for windows of automobiles and windows of dwellings. Its reinforced structure has safety functions such as bulletproofing and blast prevention, and is useful for protecting the safety of persons and property. Among them, the windows of automobiles are regarded as a main operation target and market of safety glass.

[0003] Traditionally, safety glass is manufactured by superposing and joining a plurality of tempered glasses, and by adding and complementing a plurality of layers of tempered glass, the overall structural strength is increased, and bulletproofing and blasting are performed. Has achieved the function of prevention. However, looking at the combination of the structures, the weight increased as a result of superimposing multiple layers of tempered glass. Safety glass is mainly used for window glass of automobiles.However, since the opening and closing mechanism of general automobile windows is applied to ordinary glass, the increase in weight imposes an extremely heavy load on the opening and closing mechanism of windows. As a result, the window may not be able to move up and down normally, so it is necessary to design a separate opening and closing mechanism that is compatible with the window made of safety glass. There were also restrictions. Also, for ordinary people,
Although there is little interest in converting their car windows to safety glass, the above-mentioned problems are increasingly accelerating and severely impacting the development of the safety glass market, It is very disappointing.

To remedy the weight problem that arises from the traditional safety glass manufacturing method of simply overlaying and tempering the tempered glass, later contractors reduced the number of layers of tempered glass to be laminated and further strengthened some of the tempered glass. By taking the method of substituting glass for other materials, we provide safety glass made by layering polycarbonate (PC) or polyester (PET) material on tempered glass, and moderately the whole by the toughness and elasticity of the substitute material. Has improved impact resistance. In particular, PC or PET is lightweight and greatly contributes to a reduction in the total weight of safety glass. For this reason, safety glass using this composite material is becoming mainstream in the market.

[0005] However, a composite material safety glass composed of a tempered glass and a PC or PET material has the advantage of reducing the total weight of the safety glass, but these two types of materials cannot be neglected. It had common drawbacks. That is, the abrasion resistance of the material is very low.Therefore, the friction with the weather strip due to the operation of repeatedly raising and lowering the window of the car, the friction with the dust particles when wiping the window, and so on. The surface was easily scratched, which severely affected the transparency of the safety glass. Therefore P
In order to protect the C or PET layer and prevent scratches, manufacturers usually adopt a sandwich structure, that is, sandwich a PC or PET material between two layers of tempered glass to produce safety glass. are doing. As a result, the weight of the safety glass is appropriately reduced, and an effect of preventing scratches and maintaining relatively good transparency is achieved.

[0006] However, such safety glasses also have another severe problem. That is, when the tempered glass and the PC or PET material are combined to be integrated, they are adhered with a relatively high-viscosity adhesive. Was inferior in transparency, and it was difficult to apply evenly. Therefore, after the adhesive was dried and hardened, the transparency of the safety glass was affected. In addition, the addition of adhesive in multiple layers has led to increasingly poor overall transparency, affecting driving safety.

For this reason, tempered glass and PC or PET
How to obtain good transparency in the structure of laminated safety glass is an important issue that has been waiting for a solution in the current industry.

[0008]

In view of the fact that the safety glass of the above-mentioned prior art employs a method of bonding with an adhesive, the transparency is deteriorated. Alternatively, in a method for manufacturing a safety glass in which PET materials are laminated, in addition to having a safety function capable of resisting destruction by external force, a safety glass having substantially improved overall clarity can be manufactured without using an adhesive. Accordingly, an object of the present invention is to solve the problem of poor visibility of the conventional technology.

[0009]

According to the first aspect of the present invention, a transparent bonding piece manufactured by mixing and mixing polyurethane, acrylic, and epoxy resins as raw materials is used to bond a tempered glass to a polycarbonate or polyester material. A method for manufacturing a safety glass in which both are combined as an intermediary to complete a safety glass, and includes a manufacturing step of a bonding piece and a manufacturing step of a safety glass, and the manufacturing step of the bonding piece includes the following steps: Steps 1 to 5, namely: 1. Step of heating solid polyurethane and acrylic into liquid by heating in separate tanks. 2. A step of mixing the polyurethane and the acryl in the liquid state obtained in the above step 1 and continuously stirring the mixture to form a transparent liquid first mixed material with continuous stirring. After lowering the temperature of the transparent mixed material obtained in the above step 2 to a specific temperature, adding an epoxy resin and continuously and slowly stirring at a constant temperature to obtain a second transparent mixed material 4 . 4. a step of cooling the second transparent mixed material obtained in the above 3 steps to room temperature, forming a soft solid state, and rolling by a calender to obtain a sheet material having an appropriate thickness. A step of air-drying the sheet-like material obtained in the above step 4 to obtain a joint piece, covering the upper surface and the lower surface of the joint piece with a release liner, winding the sheet into a roll shape, and waiting for subsequent use. Comprehensively, the manufacturing steps of the safety glass are the following 6 to 8 steps: 6. A step of sandwiching a polycarbonate or polyester material between two pieces of tempered glass and sandwiching the above-mentioned joint piece between the polycarbonate or polyester material and each tempered glass to complete the lamination of the safety glass components. 7. Step of placing the completed assembly of safety glass components in a vacuum high-pressure furnace and gradually increasing the pressure Step of gradually reducing the pressure in the vacuum high-pressure furnace and taking out the safety glass that has been bonded after a certain time elapses Comprehensively, combining the tempered glass and the polycarbonate or polyester material by combining the bonding pieces with the vacuum pressing technology In addition, the safety glass manufacturing method is characterized by manufacturing a safety glass having a safety function against destruction by an external force and also having improved overall transparency and clarity due to a transparent property of a joint piece.

According to a second aspect of the present invention, the composition of the bonded piece is
The method for producing safety glass according to claim 1, wherein polyurethane is 30 to 50%, acrylic is 30 to 50%, and epoxy resin is 10 to 20%, and these are heated and mixed to produce a joint piece. .

According to a third aspect of the present invention, in the first step,
The method according to claim 1, wherein the heating temperature for the polyurethane is about 95 to 120C and the heating time is about 1 hour, and the heating temperature for the acrylic is about 120 to 150C and the heating time is about 40 minutes. The manufacturing method of safety glass.

According to a fourth aspect of the present invention, in the second step,
The method for producing safety glass according to claim 1, wherein the solution obtained by mixing the polyurethane and the acrylic is stirred for 15 minutes under a continuous heating state.

According to a fifth aspect of the present invention, in the step of manufacturing the joining piece, the temperature of the transparent liquid formed by mixing polyurethane and acrylic is reduced to 50 ° C., and then the epoxy resin is added and the temperature is reduced to 50 ° C. The method for producing safety glass according to claim 1, characterized in that stirring is continued slowly for 20 minutes.

According to a sixth aspect of the present invention, in the seventh step,
The applied pressure of the vacuum pressure compaction work with almost 0~14kg / cm ^2, characterized in that the the pressing time of about 4 hours, and a method for producing a safety glass according to claim 1.

According to a seventh aspect of the present invention, in the eighth step,
The safety glass manufacturing method according to claim 1, wherein the operation time for gradually reducing the pressure is set to 40 minutes.

[0016]

According to the safety glass manufacturing method of the present invention, polyurethane, acrylic and epoxy resin raw materials are mixed to produce a transparent plastic bonded piece, and this bonded piece is made of tempered glass and PC or PET. , And gradually pressurized in a vacuum high-pressure furnace to reach a constant pressure and pressurized for a certain period of time. Manufactures safety glass with power and high transparency.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the safety glass manufacturing method provided by the present invention, a tempered glass and a PC or PET material are bonded to each other by combining a unique joint piece with a vacuum pressurizing technique. It has achieved a safety function and a significant improvement in see-through clarity.

According to the method for manufacturing safety glass of the present invention, a transparent bonded piece manufactured by mixing polyurethane, acrylic, and epoxy resin is used as an intervening material for bonding tempered glass and PC or PET material, and the three are vacuum-applied. This is a method of manufacturing safety glass by joining together by pressure.

The composition of the joint piece is polyurethane 3
0-50%, Acrylic 30-50%, Epoxy resin 10
At ~ 20%, they are produced by heating and mixing. The manufacturing flowchart is as shown in FIG. 1 and includes the following steps. 1. The solid polyurethane and acrylic are heated in separate tanks to form a liquid, wherein the heating temperature for polyurethane is about 95 to 120 ° C., the heating time is about 1 hour, and the heating temperature for acrylic is about 120 to 150. ℃, the heating time is about 40 minutes. 2. Polyurethane and acrylic which were made into a liquid by the above step 1 are mixed and slowly stirred to form a transparent liquid first mixed material, which is continuously heated during the stirring process. The stirring time is 15 minutes, and the purpose of the slow stirring is to avoid generating bubbles. The temperature of the transparent mixed material obtained in step 3.2 is 50 ° C.
After lowering, the epoxy resin is added and stirring is continued slowly at 50 ° C. to obtain a second transparent mixed material. The stirring time is about 20 minutes. The second transparent liquid mixed material obtained in step 4.3 is cooled to room temperature, turned into a soft solid state, and further rolled by a calendar into a sheet having an appropriate thickness. The thickness is determined as needed. 5. The sheet-shaped material is air-dried to form a bonded piece,
After covering the upper and lower surfaces of the joint pieces with release liners,
Wrap it in a roll and wait for use.

Please refer to FIGS. In the production of safety glass, an appropriate number of layers, a standardized tempered glass 10 and a PC material 20 or a PET material are selected in accordance with a required standard, a superposition is advanced, and a joining piece 30 is sandwiched between them. Put. The steps are as follows: 1. The PC or PET material is sandwiched between two pieces of tempered glass, and at the same time, the joint piece is sandwiched between PC or PET and each tempered glass, thus completing the lamination of the safety glass composition material. 2. The laminated safety glass composition is placed in a vacuum high-pressure furnace, and the pressure in the furnace is gradually increased. The pressurizing pressure is approximately 0 to 14 kg / cm ² , and the pressurizing time is approximately 4 hours. 3. The pressure inside the furnace is gradually reduced, and after about 40 minutes, the safety glass product whose bonding is completed is taken out.

In the safety glass manufactured by the above-described method, the transparent bonding piece is made of tempered glass and PC or PET.
Since the joining piece itself has extremely good transparency as a joining medium of the material, it has excellent see-through clarity. The piece bonds the tempered glass and the PC or PET material very flatly and firmly, so that the good see-through clarity of the safety glass can be maintained. In actual tests, when the transparency of the glass was 92 degrees and the transparency of the PC board was 87 degrees, the transparency after joining with the joining pieces reached 82 to 85 degrees. The safety glass manufactured according to the invention, in addition to the safety function against destruction by external force, has greatly improved overall transparency and clarity, and the poor transparency of the safety glass employing the conventional bonding method using an adhesive. It can be seen that the above problem has been solved.

[0022]

In summary, the method for manufacturing safety glass of the present invention is based on the unique bonding and production of a transparent bonded piece, and the combination of a vacuum pressurization and a stable bonding of tempered glass and PC or PET material. In addition to achieving the safety function against external force destruction of the safety glass, and achieving good transparency of the safety glass, the method of the present invention enables the conventional bonding method using an adhesive. It is possible to manufacture a safety glass having a higher degree of see-through clarity than a safety glass employing the method. Thus, it is clear that the present invention provides a truly "safe" glass construction, having novelty and inventive step and high industrial value.

[Brief description of the drawings]

FIG. 1 is a manufacturing flowchart of a bonded piece of the present invention.

FIG. 2 is a manufacturing flowchart of the safety glass of the present invention.

FIG. 3 is a sectional view of a preferred embodiment of the safety glass according to the present invention;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Tempered glass 20 PC material 30 Joining piece

Claims (7)

[Claims] 1. A transparent bonded piece manufactured by mixing and mixing polyurethane, acrylic and epoxy resins as raw materials, acts as an intermediary for bonding the tempered glass and the polycarbonate or polyester material, and secures both by bonding. A method for manufacturing a safety glass for completing glass, comprising a manufacturing step of a bonded piece and a manufacturing step of a safety glass, wherein the manufacturing step of the bonded piece includes the following steps 1 to 5, namely: 1. Step of heating solid polyurethane and acrylic into liquid by heating in separate tanks. 2. A step of mixing the polyurethane and the acryl in the liquid state obtained in the above step 1 and continuously stirring the mixture to form a transparent liquid first mixed material with continuous stirring. After lowering the temperature of the transparent mixed material obtained in the above step 2 to a specific temperature, adding an epoxy resin and continuously and slowly stirring at a constant temperature to obtain a second transparent mixed material 4 . 4. a step of cooling the second transparent mixed material obtained in the above 3 steps to room temperature, forming a soft solid state, and rolling by a calender to obtain a sheet material having an appropriate thickness. A step of air-drying the sheet-like material obtained in the above step 4 to obtain a joint piece, covering the upper surface and the lower surface of the joint piece with a release liner, winding the sheet into a roll shape, and waiting for subsequent use. Comprehensively, the manufacturing steps of the safety glass are the following 6 to 8 steps: 6. A step of sandwiching a polycarbonate or polyester material between two pieces of tempered glass and sandwiching the above-mentioned joint piece between the polycarbonate or polyester material and each tempered glass to complete the lamination of the safety glass components. 7. Step of placing the completed assembly of safety glass components in a vacuum high-pressure furnace and gradually increasing the pressure Step of gradually reducing the pressure in the vacuum high-pressure furnace and taking out the safety glass that has been bonded after a certain time elapses Comprehensively, combining the tempered glass and the polycarbonate or polyester material by combining the bonding pieces with the vacuum pressing technology A safety glass manufacturing method characterized by manufacturing a safety glass having a safety function against destruction by an external force and having improved overall transparency and clarity due to a transparent property of a joint piece. 2. The composition of the bonding piece is a polyurethane 30
~ 50%, acrylic 30 ~ 50%, epoxy resin 10 ~
The method for producing a safety glass according to claim 1, wherein the bonding piece is manufactured by heating and mixing them to 20%. 3. In the first step, the heating temperature for polyurethane is about 95-120 ° C., the heating time is about 1 hour, and the heating temperature for acrylic is about 120-150.
The method for producing safety glass according to claim 1, wherein the heating is performed at about 40 ° C for about 40 minutes. 4. The method of claim 2, wherein the mixed solution of polyurethane and acrylic is subjected to continuous heating under a continuous heating condition.
The method for producing safety glass according to claim 1, wherein the stirring is performed for minutes. 5. The temperature of a transparent liquid formed by mixing polyurethane and acrylic in the step of manufacturing a bonded piece is set to 50.
The method for producing safety glass according to claim 1, wherein after the temperature is lowered to 0 ° C, an epoxy resin is added, and the mixture is slowly and continuously stirred at 50 ° C for 20 minutes. 6. The method according to claim 1, wherein in the step (7), the pressurizing pressure of the vacuum pressurizing operation is set to approximately 0 to 14 kg / cm ² and the pressurizing time is set to approximately 4 hours. Manufacturing method of safety glass. 7. The safety glass manufacturing method according to claim 1, wherein in the step (8), the operation time for gradually reducing the pressure is set to 40 minutes.