JP2001294451A - Heating and pressurizing bag for manufacturing laminated glass - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a heating and pressurizing bag for manufacturing laminated glass which increases the upper limit of a service temperature and improve the number of serviceable times. SOLUTION: The heating and pressurizing bag for manufacturing the laminated glass is composed of a polyester fiber reinforced EPDM laminated fabric formed by laminating EPDM layers by means of adhesives on both surfaces of a woven fabric of polyester fibers or polyester short fibers.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat and pressure bag for producing laminated glass used for producing laminated glass, such as a windshield of a car.

[0002]

2. Description of the Related Art A heat-meltable film such as polybutyral is provided between glass plates to prevent fragments from being scattered even if the glass is broken on a windshield of a car or a window glass of a high-rise building. A so-called laminated glass is used in which the polymer film is melted and the glass plates are brought into close contact with each other.

[0003] The laminated glass is placed in a flexible bag (hereinafter referred to as a "bag") that can be hermetically sealed after a polymer film for bonding the glass is interposed between two glass plates. Generally, 100 to 13
A heat treatment is performed for 10 to 15 minutes in a hot atmosphere of 0 ° C., during which time the air in the bag is continuously sucked, and a small amount of air contained between the two glass plates is suctioned and removed. It is manufactured by sandwiching two glass plates with a bag and applying pressure with a pressure difference generated between the inside and outside.

[0004] The bag used for manufacturing the laminated glass is repeatedly used again in the above-mentioned steps even after the laminated glass is taken out after the steps of heating, suction and pressurization.

[0005] As described above, the bag is used repeatedly and continuously for a long time under a relatively high temperature environment. Therefore, in order to give the bag the performance that can withstand the above-mentioned use, the base cloth must also be made of a rubber that forms an airtight layer. The layers are both heat-resistant materials and raw materials, and in addition, the base fabric and the rubber layer are laminated fabrics bonded together with strong adhesion, and the bonded part of the bag has strong adhesion. It was needed to be glued.

In order to meet this requirement, a nylon fiber reinforced chloroprene rubber laminated cloth (hereinafter referred to as "chloroprene rubber laminated cloth") is conventionally formed of a nylon 66 base cloth, and chloroprene rubber is laminated on both sides of the base cloth via an adhesive layer. The chloroprene rubber laminated fabric is used to make flattened sack-shaped bags. The performance, service life,
It has been used to date as a balanced product.

However, in recent years, there has been a demand for shortening the molding time by performing a heat treatment at a higher temperature than before, and the conventional chloroprene rubber laminated cloth bag is unsatisfactory and demands an improvement. .

[0008]

DISCLOSURE OF THE INVENTION The present inventors have obtained a bag having excellent heat resistance which can replace a bag made of a conventional chloroprene rubber laminated cloth and having durability even in a high temperature environment for a long time. As a result of studying
Polyester fiber reinforced EP made by rolling and laminating EPDM (ethylene propylene terpolymer) on both sides of polyester fiber woven fabric via adhesive layers
By using a DM laminated cloth (hereinafter referred to as “EPDM laminated cloth”), it was possible to obtain an excellent bag as compared with a conventional chloroprene rubber laminated cloth.

It is well known that EPDM is a synthetic rubber having excellent heat resistance, but it is also well known that its molecular structure makes it difficult to chemically bond it. Therefore, as the application of EPDM, many are used as so-called molds such as weather strips or windows or monolayer sheets of rubber such as waterproof rubber sheets which do not require chemical bonding.

[0010] On the other hand, polyester has superior heat resistance as compared with nylon, but it is also difficult to bond the polyester according to a chemically desired strength.

[0011] For these reasons, it is clear that even if the EPDM laminated fabric is manufactured temporarily, the adhesion strength between the base fabric and the rubber layer cannot be obtained, so that the EPDM laminated fabric can be used as a fiber reinforced laminated fabric. Even if this is used to process secondary products,
Since there was no adhesive for obtaining sufficient strength, it could not be used.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to provide a bag in a special environment, that is, the inner surface of a component of the bag is in a negative pressure state. On the other hand, paying attention to the fact that the other side is heated under both environments of atmospheric pressure, the chloroprene rubber layer of the conventional bag is made of EPDM, and the conventional nylon 66 fabric is made of polyester. A bag was manufactured from the converted EPDM laminated cloth and tested. As a result, a polyester base cloth and EPD
Not only does the hindrance due to the weak bonding force with the M layer not occur at all, but also the properties of polyester and EPDM are exhibited, and the performance of the bag is far superior to that of the conventional bag made of proloprene rubber. It has been provided.

[0013]

Means for Solving the Problems In order to achieve the above-mentioned object, a heating / pressing bag for manufacturing laminated glass according to the present invention is provided with a closed sagger shape which is opened on one side and closed by hot pressing on three sides. A rubber bag, wherein the rubber bag is based on a woven fabric of polyester fibers, an adhesive layer containing EPDM on both front and back surfaces of the base fabric, and a rubber layer mainly composed of EPDM via the adhesive layer. Is formed of a polyester fiber reinforced EPDM laminated cloth in which the laminated glass forming glass plate placed in the rubber bag is subjected to the internal pressure P ₁ of the rubber bag and the external pressure P _{2 of the} rubber bag. Is heated and pressurized while maintaining P ₁ <P ₂ .

In the present invention, the base fabric of the polyester fiber reinforced EPDM laminated fabric is a woven fabric of polyester short fibers.

[0015]

Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a cross-sectional view of a main part showing a laminated cloth A which is a constituent material of a bag according to the present invention. The weaving density is 22 / in, both vertical and horizontal, and the weaving density is 50 in both vertical and horizontal.
0 denier, 0.25 mm thick polyester plain woven fabric 1 is used as a base cloth, and an adhesive 2 containing EPDM and other compounding agents is applied to both the front and back surfaces of the base cloth 1. EPDM compounds containing EPDM as a main component and other compounding agents are rolled and spread on the surface,
A polyester fiber reinforced EPDM laminated cloth A having a total thickness of 1.1 mm in which the heat-treated EPDM layer 3 was laminated was manufactured. In addition, 4
Weft yarns and 5 indicate warp yarns.

FIG. 2 is a cross-sectional view of a main part showing a laminated fabric B which is another component of the bag of the present invention.
Weft, both 47 yarns / in, weaving density, vertical, weft, both 20 count, 0.30 mm thick polyester plain woven fabric 1a of 0.30 mm as a base fabric, the front and back of the base fabric 1a, In the same manner as described above, an adhesive 2 containing EPDM and other compounding agents is applied, and further, EPDM compounds containing EPDM as a main component and other compounding agents are rolled and spread on the surface of the adhesive 2, respectively. A polyester short fiber reinforced EPDM laminated cloth B having a total thickness of 1.1 mm in which the heat-treated EPDM layer 3 was laminated was manufactured. In addition, 6 shows the fluff of the weft, and 7 shows the fluff of the warp.

Further, for comparison, a chloroprene rubber laminated cloth reinforced with nylon 66 fiber was manufactured. That is, in order to correspond to the polyester plain woven fabric in FIG.
6, 210 denier, fiber density, vertical and horizontal, both 50 / in, 0.19 mm thick, based on nylon plain woven fabric, both sides of this fabric correspond to adhesive 2 in FIG. The chloroprene rubber compound containing the chloroprene rubber and other compounding agents was rolled and spread, respectively, and a chloroprene rubber laminated cloth C having a total thickness of 1.1 mm in which a heat-treated chloroprene rubber layer was laminated was manufactured.

The obtained three types of laminated fabrics A, B, and C were heated in a hot atmosphere at 150 ° C. for a predetermined time, and the adhesion strength, tensile strength, and tear strength were measured. 2 and the results shown in Table 3 were obtained. All measurements are JIS
Depends on the test method of K6301. In addition, the test pieces were all taken in the horizontal direction of the laminated cloth. 3 and 4
Is a graph of Tables 2 and 3, respectively.

[0019]

[Table 1] A: Polyester fiber reinforced EPDM laminated cloth B: Polyester short fiber reinforced EPDM laminated cloth C: Nylon 66 fiber reinforced chloroprene rubber laminated cloth Heating temperature: 150 ° C

Table 1 above shows the change in the adhesion strength between the base fabric and the rubber layer after heating each of the laminated fabrics A, B and C in a hot atmosphere at 150 ° C. for a predetermined time. Table 1
As shown in the figure, the laminated cloth C was so strongly adhered that it could not be measured until 48 hours had passed since the unheated state, so that it was not possible to provide a gripping piece to be gripped by the tester for measurement. It deteriorates rapidly as the heating time elapses, and after heating for 72 hours, the test piece is no longer carbonized and cannot be measured.

On the other hand, when the laminated cloths A and B are not heated,
5.1kgf / 3cm, 6.9kgf / 3cm respectively
The fiber reinforced laminated fabric has only a very low bond strength, and this bond strength is a fiber reinforced laminate intended for the synergistic effect of physical properties obtained by integrating the base fabric and the laminated rubber layer. It is a low physical property value that cannot be considered at all for use of fabric.

However, the laminated fabrics A and B, although partially unmeasurable for other reasons, retained about 73% and 80% of the unheated strength after heating for 72 hours, respectively. As shown in the figure, the decrease in strength is slow, and after the elapse of 216 hours, about 59% and 64% of the unheated state are maintained, respectively.

[0023]

[Table 2] A: Polyester fiber reinforced EPDM laminated cloth B: Polyester short fiber reinforced EPDM laminated cloth C: Nylon 66 fiber reinforced chloroprene rubber laminated cloth Heating temperature: 150 ° C

Table 2 shows that each of the laminated fabrics A, B, and C is 15
It shows the change in tensile strength of each laminated cloth after heating for a predetermined time in a hot atmosphere at 0 ° C. Laminated cloth C rapidly deteriorates when the heating time exceeds 50 hours, and after 72 hours. Laminated cloths A and B retain about 64% and 68% of the original strength, respectively, while
Even after the lapse of 6 hours, the deterioration phenomenon is slowly maintained as the heating time elapses so that both maintain about 45% of the original strength.

[0025]

[Table 3] A: Polyester fiber reinforced EPDM laminated cloth B: Polyester short fiber reinforced EPDM laminated cloth C: Nylon 66 fiber reinforced chloroprene rubber laminated cloth Heating temperature: 150 ° C

Table 3 shows that each of the laminated fabrics A, B, and C is
FIG. 9 shows the change in tear strength of each laminated cloth after heating for a predetermined time in a hot atmosphere at 50 ° C.
As compared with the laminated fabric C, the tear strength of the laminated cloth deteriorates rapidly from the start of heating, and progresses slowly after about 24 hours.

On the other hand, the initial strength of the laminated cloth C was about 55% and 52%, respectively, of the laminated cloths A and B, but deteriorated rapidly after about 50 hours, and lost after about 72 hours. .

Next, each of the laminated cloths A, B, and C was cut into a predetermined size, and three types of bags according to constituent materials shown in FIGS. 4 and 5 were produced by hot pressing. .

The bag 8 is a flat bag having a flat shape, and has an opening on one side, and three sides are bonded by a hot press. On the surface of the opening, a thick rubber plate 9 for reinforcing and complementing is adhered to the outer surface of the periphery of the opening, and a handle 10 is further attached. Toride 10
Is used to support the bag 8 by hanging it on a hanger and to increase the opening area when putting glass in and out. Near the opening of the bag 8, the seal assisting plates 11 made of a thick rubber plate are adhered to both surfaces.

The seal assisting plates 11 and 11 are
When the inside of the bag is depressurized and the seal assisting plates 11 and 11 are pressed against each other with two bag components interposed therebetween to block the inflow of air, wrinkles are prevented from forming in the bag components and a sealing effect is obtained. It works to enhance.

At the bottom of the bag 8, a nozzle 12 connected to a suction machine extends out, and the end of the nozzle 12 is connected to a suction pipe 13 running along the bag 8. It is fixed by a fixing seat 15. Suction pipe 13
Is provided with a suction hole 14 so that air at various points in the bag 8 can be evenly sucked.

As shown in FIGS. 7 and 8, the three sides of the bag 8 other than the opening are heated and pressed with a V-shaped tape 16 inside the two bag components and a reinforcing tape 17 on the outside with a hot press. Glued.

Into the three types of bags 8 made of the constituent materials manufactured as described above, two pieces of laminated glass forming glass plates with a polybutyral film interposed are put, and the bags 8 are closed. A suspension bar (not shown) provided on the pedestal is provided between the support plate 11 and 11 and the opening.
11 in parallel with the hanging bar as a bending axis,
The opening and the seal assisting plates 11 and 11 are bent in a pin curve shape, and two glass plates are attached to the bottom of the bag 8 and the assisting plates 11 and 11.
11, a nozzle and a suction device (not shown) are connected, and the bag 8 is moved while running on a conveyor belt.
The inside air is continuously sucked in and heated for 10 minutes in a hot atmosphere of 160 ° C., and the laminated glass is taken out from each of the three types of bags for each constituent material, and the three types of bags are continuously used for the next use. Was served.

When 400 bags of three types of bags for each component were used, the deterioration of each bag was examined. In the bag made of the laminated cloth C, the components tended to deteriorate significantly. No deterioration phenomenon was observed in the bags made of the laminated cloths A and B, and it was found that the bags could be used further.

[0035]

According to the present invention, the bag is formed by using the laminated cloth A or B which is smaller in the initial adhesion strength and the initial tensile strength between the base cloth and the rubber layer as compared with the laminated cloth C. In the case of the laminated cloth C, nylon 66, which is the base cloth, and polychloroprene rubber are sufficiently chemically bonded, whereas the chemical bonding of the laminated cloths A and B is weak.
Since the layer is only reinforced form-retained by the base fabric in the state of being combined with the base fabric, the EPDM of the base fabric of the polyester fiber is retained without losing its properties. Even if heated for a long time, polyester fiber and EP
Each characteristic of DM makes it durable.

In the case of using the laminated cloth B as a constituent material, the laminated cloth B has a lower initial adhesion strength and an initial tensile strength than the laminated cloth C. Compared with the laminated cloth C, it is weak because it retains the characteristics of each of the polyester fiber base cloth and the EPDM without being lost, and has a high durability even when heated for a long time. It will be.

In the case of the laminated cloth B, since the fluff of the base cloth is buried in the adhesive layer or the EPDM layer, all of the adhesive strength, the tensile strength and the tensile strength are lower than those of the laminated cloth A. Although the physical properties are high, this is because the physical bonding area is large, and the respective characteristics of the base fabric of the polyester fiber and the EPDM are maintained without loss, and the deterioration phenomenon is slower than that of the laminated fabric A. Therefore, the bag using this as a constituent material is more durable than that using the laminated cloths C and B.

[0038] In the present invention, it has been conventionally used.
Nylon fiber reinforced chloroprene rubber laminated cloth,
Using a laminated cloth with lower adhesion and tensile strength than laminated cloth C
The bag of the present invention constitutes a bag.
Part pressure P₁And bag external pressure P ₂And P₁<P₂The relationship
Heated and loaded while holding
A relatively loose connection, such as the connection between a textile backing and EPDM
Not only does not cause any trouble but also loose connection
Loses the properties of polyester fiber and EPDM
Without heat, durable, above all, heat resistant
1000 times with a cycle of 150 ° C for 10 minutes
There are effects such as enabling the above use.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a main part showing a laminated cloth A which is a constituent material of a heat and pressure bag for manufacturing laminated glass of the present invention.

FIG. 2 is a cross-sectional view of a main part showing another laminated cloth B which is a constituent material of the heat and pressure bag for manufacturing laminated glass of the present invention.

FIG. 3 is a graph of Table 2.

FIG. 4 is a graph of Table 3.

FIG. 5 is a partially cutaway front view of the heat and pressure bag for manufacturing laminated glass of the present invention.

FIG. 6 is a sectional view taken along line VI-VI of FIG. 5;

FIG. 7 is a sectional view taken along line VII-VII of FIG. 5;

8 is a sectional view taken along line VIII-VIII in FIG.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 polyester plain woven fabric 1a short fiber polyester plain woven fabric 2 adhesive 3 EPDM layer 4 weft 5 warp 6 weft fuzz 7 warp fuzz 8 heat and pressure bag for laminated glass manufacturing 9 rubber plate 10 handle 11 seal assisting plate 12 Nozzle 13 Suction pipe 14 Intake hole 15 Fixed seat 16 V tape 17 Auxiliary tape A Polyester fiber reinforced EPDM laminated cloth B Polyester short fiber reinforced EPDM laminated cloth C Nylon 66 fiber reinforced chloroprene rubber laminated cloth

Continuation of front page (72) Inventor Yoshiyuki Sato 1-17-18 Edobori, Nishi-ku, Osaka-shi F-term in Toyo Gum Kogyo Co., Ltd. (reference) 4G061 AA04 BA01 BA02 DA40 DA63 DA67

Claims (2)

[Claims] 1. A hook-shaped rubber bag closed on one side and closed by hot pressing on one side, wherein said rubber bag is made of a woven fabric of polyester fibers, and EP is provided on both sides of said base fabric.
An adhesive layer containing DM and EP through the adhesive layer
A rubber layer composed mainly of DM are constituted by the polyester fiber reinforced EPDM laminated fabric that is integral, the internal pressure P ₁ of the rubber bag glass forming the glass plate combined were placed into the rubber bag _P 1 and an external pressure _{P 2} of the rubber bag <
Heating was maintained at P _2, glassmaking heat and pressure bag together, characterized in that pressurized. 2. A hook-shaped rubber bag which is closed at one side and closed by hot pressing on one side, wherein said rubber bag is made of a woven fabric of polyester short fibers, and E and E are provided on both sides of said base fabric.
An adhesive layer containing PDM, and E through the adhesive layer.
A rubber layer composed mainly of PDM is composed of polyester staple fibers reinforced EPDM laminated fabric that is integral, the glass forming the glass plate combined placed in the rubber bladder and the internal pressure P ₁ of the rubber bag an external pressure P ₂ of the rubber bag P
_{1 <heated} and maintained at P _2, glassmaking heat and pressure bag together, characterized in that pressurized.