JPH0825483A - Bonding of glass fiber reinforced polyolefinic porous resin material - Google Patents

Abstract

PURPOSE:To mutually strongly bond glass fiber reinforced polyolefinic porous resin sheet materials. CONSTITUTION:A room temp. curable urethane adhesive 3 of which the viscosity is adjusted to 300-3000cps is applied to the surfaces of glass fiber reinforced polyolefinic porous resin sheet materials 1, 7 to be bonded not only to form adhesive layers 3a on the entire surfaces of the resin sheet materials 1 but also to infiltrate the adhesive into the internal voids 2 of the resin sheet materials 1 and, in this state, the adhesive is cured to mutually integrally bond the resin sheet materials 1, 1 through the adhesive layers 3a and the bonding strength of both resin sheet materials are sill more enhanced by the anchoring effect of the adhesive infiltrated into the resin sheet materials to be cured.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for adhering a glass fiber reinforced polyolefin type porous resin plate material which is lightweight and has high strength.

[0002]

2. Description of the Related Art A polyolefin fiber porous resin plate reinforced with glass fiber has excellent strength, is lightweight, and is easy to handle. Therefore, it is excellent when used as a building material such as a floor material or a formwork. Although it exhibits its function, it is difficult to firmly bond the polyolefin-based porous resin plate with a normal adhesive because the polyolefin-based resin such as polypropylene covers the periphery of the glass fiber as a binder. Therefore, various bonding methods have been conventionally developed.

For example, glass fiber reinforced polyolefin type porous resin plates are heated to 150 ° C. or more to be fused to each other, or the bonding surface is ion-activated by radiation such as plasma and corona to obtain adhesive strength. However, these bonding methods have problems in that expensive dedicated equipment is required, the working process is complicated, and the production cost is high. Therefore, a primer and an adhesive for exclusive use with polyolefin have been developed and are commercially available. In addition, when a glass fiber reinforced polyolefin sheet material is heated and expanded to obtain a porous resin plate, a polyolefin film is interposed between the sheet materials to heat and melt.

[0004]

However, even if the resin plates are adhered to each other with a primer or an adhesive exclusively for polyolefin, only the smooth surface of the resin plate is integrated through the primer or the adhesive. However, since it is a resin plate with poor adhesiveness, sufficient adhesive strength cannot be obtained. It is also known that the surface of the resin plate is appropriately sanded to expose the glass fiber on the adhesive surface and the glass fiber is bonded and integrated with the adhesive for glass. Since the amount of glass fiber used is only a few percent of the entire surface, sufficient adhesive strength cannot be expected in this method either.

Further, as described above, the polyolefin film is interposed between the glass fiber reinforced polyolefin sheet materials, and in that state, the sheet material is heated and expanded to be pressed to a predetermined thickness, and the sheet materials are melted by melting the polyolefin film. According to the method of adhering, not only the equipment cost is high, but also only the surface of the sheet material is adhered, and since it has a three-layer structure, delamination occurs due to impact etc. and the adhesive force is also tensile strength. Since only about 10 kgf / cm ² is obtained, there is a problem that it is not suitable for use as a member requiring strength such as a flooring material.

The present invention has been made in view of such problems, and an object thereof is a method for adhering a glass fiber reinforced polyolefin type porous resin material capable of efficiently and surely obtaining a strong adhesive strength. To provide.

[0007]

In order to achieve the above object, a method of adhering a glass fiber reinforced polyolefin type porous resin material of the present invention is a method of adhering a glass fiber reinforced polyolefin type porous resin material and another material integrally. The viscosity of the
Use a room temperature curing adhesive such as urethane adhesive prepared at 300 to 3000 cps, apply this adhesive to the adhered surface of glass fiber reinforced polyolefin porous resin material or the adhered surface of other material, Together, these are characterized in that the adhesive is permeated into the inside of the glass fiber reinforced polyolefin-based porous resin material and cured to bond the resin material and other materials.

Preferably, the other material is a glass fiber reinforced polyolefin type porous resin material, the resin material has a porosity of 30 to 70%, and the resin material is produced by a papermaking method. A polypropylene sheet material containing 20 to 40% by weight of glass short fibers is heated and expanded to form a porous sheet.

[0009]

The glass fiber reinforced polyolefin type porous resin material is obtained by heating and expanding a sheet-like material formed by binding glass short fibers with a polyolefin type synthetic resin such as polypropylene and the like. Due to the expansion, 30 to 70% of voids are formed inside.
Since the viscosity of the adhesive for adhering this glass fiber reinforced polyolefin type porous resin material is adjusted to 300 to 3000 cps, when the adhesive is applied to the resin material or another material and laminated, the adhesive becomes porous. It penetrates into the voids inside the resin material while being sucked in by a capillary phenomenon and remains in a layered state on the surface of the resin material in an appropriate amount.

After applying the adhesive in this manner, the adhesive is cured with the resin material and the other material superposed,
These polymerized surfaces are bonded and integrated by an adhesive layer that is layered on the surface, and the adhesive that is continuous from this adhesive layer penetrates into the numerous voids in the resin material and the cured adhesive exerts an anchoring effect, It will be firmly bonded and integrated with other materials. In addition, the adhesive is normal temperature (humidity) such as urethane adhesive.
Since it is a curable adhesive, it can be easily and reliably cured at the joint surface between the superposed resin material and another material.

[0011]

EXAMPLE Next, an example of the present invention will be described with reference to the drawings. A glass fiber reinforced polyolefin type porous resin plate material 1 is a sheet material formed by binding glass fibers with a polyolefin type synthetic resin such as polypropylene or polyethylene. It is an expansion plate obtained by heating and expanding, and in this example, 20 to 60% by weight, preferably 20 to 40% by weight, of glass short fibers having a fiber length of 7 to 50 mm, and 40 to 40% by weight of polypropylene resin. 80% by weight, preferably 60-80% by weight
And, to prepare a dispersion by dispersing in a surfactant-containing aqueous medium in which air microbubbles are dispersed, papermaking this dispersion on a porous support, so-called, to obtain a papermaking sheet by a papermaking method, A sheet material having a thickness of 5 mm is manufactured by pressing glass with a roll or the like to melt polypropylene while it is heated to bond the glass fibers together with polypropylene, and heating this sheet material at 200 ° C or higher to restore the glass fiber. It is a plate material having a smooth surface which is expanded by a force and compressed by a press into a plate having a thickness of 7 to 15 mm.

As described above, when the sheet material is heated and expanded to obtain the resin plate material 1, the expansion causes the innumerable voids 2 to be formed in the resin plate material, and the porous resin plate material 1 having air permeability is obtained. . In this case, if a sheet material having a thickness of 5 mm with no voids is expanded into a plate material having a thickness of 7 mm,
A porous resin plate material 1 having a porosity of 29% was obtained, and when a sheet material having a thickness of 5 mm was expanded into a plate material having a thickness of 15 mm,
A porous resin plate material 1 having a porosity of 67% is obtained.

This glass fiber reinforced porous resin plate material 1, 1
In the case of bonding and bonding and bonding the bonding surface with the adhesive 3, it is desirable that the surface is lightly sanded to expose the glass fiber of the surface layer portion to the bonding surface and form a rough surface. Of course, the plate materials 1 and 1 may be directly bonded without surface treatment.

The adhesive 3 has a viscosity of 300 to 3000 cps.
Use the room temperature (moisture) curing type urethane adhesive prepared in. When the viscosity of the adhesive is 3000 cps or more, when it is applied to the expanded porous resin plate 1 having the porosity of 30 to 70%, the permeability to the voids 2 inside the resin plate 1 is poor and the bonding surface It will be applied intensively on the
Therefore, there is no anchoring effect and the resin plate materials 1 and 1 are surface-bonded to each other only at the bonding surface, so that the bonding strength becomes weak.
Further, when an adhesive having a viscosity of 300 cps or less is used, the resin plate 1 is rapidly permeated into the internal voids 2 and almost no adhesive remains on the joint surface, so that Since adhesive failure occurs, the adhesive 3 whose viscosity is adjusted within the above range is used.

Further, when a heat-curable adhesive is used as the adhesive 3, the glass fiber reinforced porous resin plate material 1 has a very good heat insulating property, so that heat is applied to the adhesive surface through the resin plate material 1. It is not preferable to use such a heat-curable adhesive, because the adhesive cannot be sufficiently passed through, and thus it takes a long time for the adhesion to reduce the processing efficiency and it becomes difficult to make the adhesive force uniform. On the other hand, even when a pressure-curing adhesive is used, most of the adhesive is anaerobic, and therefore, there is a problem in curing the adhesion of the glass fiber-reinforced porous fiber board material 1 having air permeability. Is unsuitable. Therefore, in the present invention, the room temperature (moisture) curable adhesive is used as described above.

This adhesive 3 whose viscosity was adjusted as described above
Is applied to the opposing surfaces of the glass fiber reinforced porous resin plate materials 1, 1 to be bonded, the glass materials are sucked into the innumerable voids 2 existing between the glass fibers by a capillary phenomenon, and the plate materials 1, 1,
Void in the surface layer part from the joint surface (surface) to the appropriate depth
Is filled with the adhesive 3b, and a thin adhesive layer 3a is applied over the entire joint surface between the resin plate members 1 and 1.

After the adhesive 3 is applied to both the resin plate materials 1 and 1 as described above, the resin plate materials 1 and 1 are joined and bonded. At this time, both resin plate materials 1 and 1 are dried by leaving them in a state of being overlapped with each other without being pressed or heated.
Let it cure. When the adhesive 3 hardens, both resin plate materials 1, 1
Both resin plate materials 1 and 1 are integrally adhered by an adhesive material layer 3a that is thinly layered over the entire bonding surface of the above, and the space 2 inside the both resin plate materials 1 and 1 is bonded from this adhesive material layer 3a. The innumerable adhesive 3b that has been infiltrated and filled in succession has an anchoring effect to more firmly bond and integrate the two resin plate materials 1, 1.

When the sheet material is heated and expanded to obtain the glass fiber reinforced porous resin plate material 1, a polypropylene film is provided on the surface of the sheet material in order to prevent glass fibers from rising and to impart surface glossiness. It is attached,
This film is melted and cut at the time of heat expansion and pressing of the sheet material and penetrates into the inside, but a part remains on the surface. However, even in such a case, the adhesive 3 is coated on the entire surface of the resin plate 1 as described above, and the adhesive 3 permeates and fills the inside void 2 from the coating layer portion. Adhesive strength can be obtained.

Next, a porosity of 58% prepared by the papermaking method,
Two glass fiber reinforced porous resin plates with an adhesive area of 20 x 20 mm are bonded together with a room temperature curable urethane adhesive and a room temperature curable epoxy adhesive to create samples, and the adhesive strength of each is tested by a tensile test. The results measured by Table 1 are shown in Table 1 and Table 2, respectively. In addition, the average value of 5 or more samples adhered by each adhesive using 5 kinds of room temperature curing type urethane adhesives and 2 kinds of room temperature curing type epoxy adhesives with different viscosities Is shown as a test result. Further, in the table, the adhesives of, are one-liquid type room temperature curing type, the other adhesives are of two-liquid type room temperature curing type, ~ are urethane type adhesives, and are epoxy type adhesives.

[0020]

[Table 1]

[0021]

[Table 2]

As can be seen from the above table, the viscosity is 600
, 1,500, 2,000cps, the adhesive strength of the sample is 20kgf / cm ² or more, and it is about 20kgf / cm ² in the tensile test of the base material itself of the glass fiber reinforced porous resin plate material.
Since it is of a degree, it is firmly bonded and integrated.

The adhesive strength of the adhesive having a viscosity of 3,000 cps is 15 to 20 kgf / cm ^2, which is almost the same as that of the base material and is sufficiently adhered. Furthermore, the adhesive having a viscosity of 100 cps was too low to enter the voids of the glass fiber reinforced porous resin plate material and did not remain on the surface, so that it was not adhered. Furthermore, the viscosity is 10,000 cp
The adhesives of s or above had too high a viscosity to enter the voids, did not exert the anchoring effect, and had insufficient adhesive strength. In addition, even if different types of adhesives such as urethane type and epoxy type are used,
It was found that it does not affect the adhesive strength.

FIG. 2 shows a case where the above glass fiber reinforced porous resin plate material 1 is used as a floor material for a skating rink, and a resin plate material having a thickness of 12 mm, a vertical width of 1800 mm and a horizontal width of 600 mm is mainly used as the floor material A1. 24m thick on the outer edge of the bottom surface and in the middle
Perimeter wall material A2 made of resin plate material of m and height 60mm and reinforcing crosspiece material A
The three are bonded together. The peripheral wall material A2 and the reinforcing crosspiece material A3 are formed by laminating two 12 mm-thick resin plate materials 1 with the adhesive 3 as described above and adhering them to each other and cutting them to a desired size. Yes,
The above-mentioned adhesive 3 is also used to integrally adhere to the floor material main body A1.

Since the floor material of a skating rink is always affected by moisture, a floor material mainly made of a veneer board is conventionally used to attach a peripheral wall material made of wood and a reinforcing crosspiece to the lower surface by nailing. The material is corroded in 2 to 3 years and cannot be used, and the nail also rusts in a short period of time to reduce the fixing strength, but as described above, it is produced by the glass fiber reinforced porous resin plate material 1. According to the above-mentioned floor material, neither the resin plate material nor the adhesive is corroded by moisture, which is suitable for long-term use. Furthermore, since it is lighter than the plywood floor material, it has excellent handleability and workability. There is something.

FIG. 4 shows a curved concrete pouring formwork formed by the glass fiber reinforced porous resin plate material 1 described above. A main formwork body B1 having a concrete pouring surface is formed.
And the reinforcing material fixed to the back peripheral edge of the main formwork body B1.
The reinforcing material B2 is fixed to the main frame body B1 by the adhesive 3 and the reinforcing material B2 on the long side of the main frame body B1 is fixed at regular intervals V-shaped notches 4 as shown in FIG. After removing the adhesive 3, the adhesive 3 is applied to the facing surface of the notch 4.
Is applied and impregnated, the main frame B1 is curved and the facing surfaces of the notches 4 are adhered to each other. The surface of the main frame B1 is coated with urethane. According to the mold made of this glass fiber reinforced porous resin plate material, there is so-called rigidity compared to a mold made of plywood,
It can withstand even breaking strength and can form a uniform curved surface with a small number of bent portions.

FIG. 5 shows an example in which the glass fiber reinforced porous resin plate material is used for a heat insulating concrete pouring formwork. A formwork surface material C2 having a concrete pouring surface is formed.
And a mold main body C1 made of the above-mentioned porous resin plate material, and a mold back material C3 made of a sheet material laminated with papermaking sheets containing glass fibers obtained by a papermaking method. Formwork surface material
C2 is made of glass fiber reinforced epoxy resin, heater 5
Is inherent. These formwork main body C1 and formwork surface material C2
And are bonded using a room temperature curing type epoxy adhesive 3,
The formwork main body C1 and the formwork backside material C3 are adhered using a room temperature curing type urethane adhesive. In addition, it is preferable to sand the bonding surface of the mold back surface material C3 before bonding. With this form, electricity is passed through the heater 5 to generate heat,
It is possible to prevent freezing of water in concrete.

FIG. 6 shows an example in which the glass fiber reinforced porous resin plate material is used for a floor panel of a truck. The floor panel D1 made of the glass fiber reinforced porous resin plate material, the truck body D3, and It consists of a rubber D2 for absorbing vibration that is interposed between. Floor panel D1
On the vibration absorbing rubber D2, the right and left two sheets are joined by the urethane adhesive 3, and the floor panel D1 and the vibration absorbing rubber D2 are also fixed by the urethane adhesive 3. With this floor panel, the weight of the entire vehicle body can be reduced.

[0029]

INDUSTRIAL APPLICABILITY As described above, the present invention is a bonding method for bonding and integrating a glass fiber reinforced polyolefin type porous resin material and another material, and a urethane type adhesive agent having a viscosity of 300 to 3000 cps. This room temperature curing adhesive is used, and this adhesive is applied to the adhered surface of the glass fiber reinforced polyolefin-based porous resin material or the adhered surface of another material, and the adhesive is combined with the glass fiber reinforced polyolefin It is characterized in that it penetrates even into the inside of the porous resin material and is cured to bond the resin material and other materials, and the viscosity of the adhesive is adjusted to 300 to 3000 cps, so glass fiber reinforced The polyolefin-based porous resin material can be sufficiently penetrated into the voids, and the adhesive layer can be formed over the entire surface of the resin material.

Therefore, the superposed surfaces of the resin material and the other material are surely adhered and integrated by the adhesive layer which is layered on the surface, and the adhesive layers are continuously connected to penetrate into the numerous voids in the resin material,
The cured adhesive has an anchoring effect, and can more firmly bond the resin material and the other material. Further, since the adhesive is a room temperature (moisture) curable adhesive such as a urethane-based adhesive, it can be easily and surely cured at the joint surfaces that are overlapped.

[Brief description of drawings]

FIG. 1 is a simplified enlarged sectional view showing a bonded state,

FIG. 2 is a simplified perspective view of a flooring material formed of a porous resin plate material,

FIG. 3 is a simplified side view of forming a mold with a porous resin plate material,

FIG. 4 is a simplified side view of the formed mold.

FIG. 5 is a simplified cross-sectional view of another form frame formed of a porous resin plate material,

FIG. 6 is a simplified cross-sectional view of a truck floor panel formed of a porous resin plate material.

[Explanation of symbols]

 1 Glass fiber reinforced polyolefin type porous resin plate material 2 Void 3 Room temperature (moisture) curing type urethane adhesive

Continuation of front page (51) Int.Cl. ⁶ Identification number Office reference number FI technical display area B29K 105: 04 105: 12 B29L 9:00

Claims (4)

[Claims] 1. An adhesive method for adhering and integrating a glass fiber reinforced polyolefin type porous resin material and another material, which is a room temperature curing type adhesive such as a urethane type adhesive having a viscosity adjusted to 300 to 3000 cps. This adhesive is applied to the adhered surface of the glass fiber reinforced polyolefin-based porous resin material or the adhered surface of another material, and the adhesive is applied to the inside of the glass fiber reinforced polyolefin-based porous resin material. A method for adhering a glass fiber reinforced polyolefin-based porous resin plate material, which comprises allowing the resin material and other material to adhere to each other by allowing the resin to permeate and cure. 2. The method for adhering a glass fiber reinforced polyolefin type porous resin material according to claim 1, wherein the other material is a glass fiber reinforced polyolefin type porous resin material. 3. The method for adhering a glass fiber reinforced polyolefin type porous resin material according to claim 1 or 2, wherein the glass fiber reinforced polyolefin type porous resin material has a porosity of 30 to 70%. . 4. A glass fiber reinforced polyolefin type porous resin material is produced by a papermaking method, and glass short fibers are added in an amount of 20 to 40.
3. A polypropylene sheet material containing 1% by weight is expanded by heating to make it porous.
Alternatively, the method for adhering the glass fiber reinforced polyolefin type porous resin material according to claim 3.