JPH10114552A - Double glazing with resin spacers - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To realize unprecedented high productivity of a double-glazed glass and to provide a double-glazed glass at a lower cost and more simply. A spacer (20) includes a butyl rubber and a crystalline polyolefin, wherein the ratio of the butyl rubber to the total amount of both is 50 to 98% by weight, and the ratio of the crystalline polyolefin is 2 to 50% by weight. Double-layer glass 10 made of a plastic resin composition.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a double glazing using a resin spacer.

[0002]

2. Description of the Related Art In recent years, double glazing has been attracting attention from the viewpoint of energy saving, and its demand has been increasing. Since the production requires many steps, the cost is higher than that of a normal glass sheet, and further cost reduction is desired.

As shown in FIG. 4, most of present double glazings have at least two glass plates 1a and 1b opposed to each other via a spacer 2 to form a hollow layer between the glass plates 1a and 1b. Do it. Then, the glass plates 1a and 1b and the spacer 2
The primary sealing material 3 is interposed between the glass plates to block the hollow layer from the outside air, and the gap (recess) formed by the inner surface of the peripheral portion of the glass plate and the outer peripheral surface of the spacer facing each other is polysulfide. It is sealed with a room temperature-curable secondary seal material represented by a silicone or silicone system.

Hitherto, various simplifications or improvements in productivity through automation have been studied and production costs have been studied and proposed in the production process of a double glazing.
For example, a method of bending an aluminum spacer or a method of applying a room-temperature-curable sealing material can be used. In addition, as shown in FIG.
The method of using as has been proposed.

[0005] However, in the case of a double-glazed glass using such a room-temperature-curable sealing material, irrespective of the type of spacer used, after the production of the double-glazed glass, it takes a long time to cure the sealing material. Therefore, products cannot be shipped until curing is completed.

[0006] Therefore, a curing space must be provided in the factory, and the product must be shipped after being stored for a certain period of time, so that the delivery period is prolonged, and it has not always been possible to meet the needs of customers. And to meet the growing demand in the future,
It is considered that the above-mentioned curing time needs to be shortened in order to avoid the above-mentioned curing space and to secure a sufficient supply of the double-glazed glass, since a more curing space than before is required.

[0007]

In order to reduce the cost of a double-glazed glass, a double-glazed glass can be produced without using a secondary sealing material by using a molded product made of a resin mixed with a desiccant as a spacer. A method has been proposed (Japanese Patent Publication No. 61-2)
0501). However, this spacer resin has insufficient hardness as a spacer, and in fact, it has been difficult to maintain the shape of a double-layer glass using only the spacer made of the above resin.

Further, a hard resin extrudable, for example,
A double-layer glass using a material having a hardness of JIS A hardness 95 in which a desiccant is kneaded in a thermoplastic resin such as a vinyl chloride resin or hot melt butyl as a spacer is known (JP-A-7-17748). However, this JIS
When a material having a hardness of 95 A hardness is used as a spacer or a sealing material for a double glazing, the stress applied to the sealing portion or the glass plate of the double glazing is large, and the separation of the sealing portion or the double glazing itself is performed. There is a problem that glass breakage occurs. Therefore, at present, there is no known multi-layer glass that does not use a secondary sealing material and that satisfies all of the properties such as life, shape retention and moldability with only a spacer required as a multi-layer glass.

By the way, as disclosed in Japanese Patent Application Laid-Open No. 7-17748, butyl rubber is used as a sealing material for building materials because of its adhesiveness, high weather resistance and low moisture permeability. I have. However, since it has low hardness and cold flow property, there is a problem in terms of long-term durability alone depending on the intended use. There is also a problem that workability is poor due to high melt viscosity. There is also a method of mixing various fillers to improve the hardness, but if the hardness is increased only by adding the filler, the melt viscosity increases and the workability is significantly impaired, and in some cases, the tensile strength and tearing This is undesirable because the strength is reduced.

[0010] That is, butyl rubber has a function of sealing the surface between the glass plate and the spacer and maintaining airtightness, and therefore can be suitably used as an end sealing material of the double-layer glass. In this case, since the hardness of the butyl rubber is low, a spacer made of a metal such as aluminum is usually used, and the butyl rubber is disposed as a sealing material between the spacer and the glass plate. But,
As described above, the use of metal spacers complicates the manufacturing process of the double glazing.

Thus, no metal spacer is required,
There is a demand for the development of a sealing material that can further simplify the manufacturing process. At present, there is no known multi-layer glass that does not use a secondary seal and only uses spacers required as a multi-layer glass and satisfies all properties such as life, shape retention, and moldability.

SUMMARY OF THE INVENTION An object of the present invention is to provide a double glazing capable of solving the problem of curing which requires a long time after production and realizing an unprecedentedly high productivity.

[0013]

According to the present invention, there is provided a double glazing wherein two or more glass plates are opposed to each other with a spacer interposed therebetween so as to form a hollow layer.
The spacer contains a butyl rubber and a crystalline polyolefin, and the ratio of the butyl rubber to the total amount of both is 50 to 98% by weight, and the ratio of the crystalline polyolefin is 2 to
A double glazing using a resin spacer, comprising a thermoplastic resin composition of 50% by weight.

Further, the present invention provides that two or more glass plates
In a double-glazing unit which is opposed to and spaced apart by a spacer so as to form a hollow layer therebetween, the spacer includes a butyl rubber, a crystalline polyolefin, and an inorganic filler, and the butyl rubber and the crystalline The ratio of the butyl rubber to the total amount of the polyolefin is 50 to 98% by weight, the ratio of the crystalline polyolefin is 2 to 50% by weight, and the total of the butyl rubber and the crystalline polyolefin is 10%.
The present invention provides a double-glazed glass using a resin spacer, comprising a thermoplastic resin composition in which the ratio of an inorganic filler to 0 part by weight is 200 parts by weight or less.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in more detail with reference to the drawings. FIG. 1 is a partial schematic cross-sectional view showing an example of the configuration of a double glazing according to the present invention.
Means that the two glass plates 1a and 1b are
Is formed at predetermined intervals by only the spacers 20 made of the thermoplastic resin composition in the following proportions. In addition, the meaning of the above-mentioned "only by the spacer 20" indicates that a secondary sealing material, a metal spacer, and the like are not required, and includes a primer treatment applied as necessary.

The resin composition for a spacer according to the present invention comprises:
A resin composition comprising a butyl rubber and a crystalline polyolefin, wherein the proportion of the butyl rubber is 50 to 98% by weight and the proportion of the crystalline polyolefin is 2 to 50% by weight based on the total amount of both.

Further, it contains butyl rubber, crystalline polyolefin and inorganic filler, and the ratio of butyl rubber to the total amount of butyl rubber and crystalline polyolefin is 5%.
0 to 98% by weight, and the ratio of the crystalline polyolefin is 2 to 5
0% by weight, and the ratio of the inorganic filler to the total 100 parts by weight of the butyl rubber and the crystalline polyolefin is 2%.
The resin composition is not more than 00 parts by weight.

The butyl rubber in the present invention means a homopolymer of isobutylene, a copolymer with another monomer, or a modified product thereof. As the copolymer, a copolymer obtained by copolymerizing with a relatively small amount of isoprene (usually called butyl rubber) is preferable. Modified products include halogenated butyl rubber and partially cross-linked butyl rubber. Particularly preferred butyl rubbers are a copolymer of isobutylene and isoprene, which is usually called butyl rubber, and a partially crosslinked butyl rubber.

In the present invention, the crystalline polyolefin is
It refers to homopolymers of olefins such as ethylene and propylene, copolymers with other monomers, and modified products thereof, which have crystallinity. The structure of the polymer is preferably a syndiotactic structure or an isotactic structure, but may include other structures. As the olefin, ethylene and propylene are particularly preferable.

Examples of the copolymer include a copolymer of two or more olefins and a copolymer of an olefin with another monomer, and a copolymer of ethylene or propylene with another monomer that does not inhibit crystallinity. Polymers are suitable. As the copolymer, a block copolymer is more suitable than an alternating copolymer or a random copolymer. Modified products include crystalline polyolefins into which functional groups such as acid anhydride groups, carboxyl groups, and epoxy groups have been introduced.

Particularly preferred crystalline polyolefins in the present invention are substantially homopolymers, polyethylene and polypropylene. For example, low density polyethylene, medium density polyethylene, high density polyethylene and the like can be used as polyethylene.

Crystallinity of the crystalline polyolefin is 30%
Or more is preferable, and particularly preferably 50% or more. For example,
Typical crystallinity values for normal crystalline polyolefins are 50-60% for low density polyethylene, 75-90% for high density polyethylene, and 55-6% for polypropylene.
5%. Although the molecular weight is not particularly limited, those having a number average molecular weight of about 200,000 to 800,000 for polyethylene and about 100,000 to 400,000 for polypropylene are suitable.

As described above, polyethylene and polypropylene have high crystallinity and thus have a lower moisture permeability than butyl rubber. Among them, those having a lower melt viscosity than those of butyl rubber alone have the same composition. Has a reduced melt viscosity and improves moldability. Therefore, various inorganic fillers can be blended to realize a sealing material having higher hardness, and these are particularly preferable from the viewpoint of economy.

In the above resin composition, the ratio of the crystalline polyolefin to the total amount of the butyl rubber and the crystalline polyolefin is 2 to 50% by weight, and preferably 5 to 50% by weight.
４０40% by weight. The ratio of crystalline polyolefin is 2
If the content is less than 50% by weight, it is difficult to increase the hardness of the butyl rubber. If the content is more than 50% by weight, the properties of the crystalline polyolefin are predominant and the properties of the butyl rubber are hardly exhibited.

When the inorganic filler is blended, the ratio of the crystalline polyolefin to the total amount of the butyl rubber and the crystalline polyolefin can be small. For example, when about 50 parts by weight or more of the inorganic filler is blended with respect to 100 parts by weight of the total of the butyl rubber and the crystalline polyolefin, the amount of the crystalline polyolefin is based on the total amount of the butyl rubber and the crystalline polyolefin. When the proportion is 2 to 20% by weight, the desired effect is sufficiently exhibited.

The resin composition of the present invention containing a butyl rubber and a crystalline polyolefin can be blended with a substantially effective amount of an inorganic filler. The substantially effective amount means 1 part by weight or more based on 100 parts by weight of the total of the butyl rubber and the crystalline polyolefin. If an excessively large amount of the inorganic filler is added, the melt viscosity of the composition increases, and the tensile strength and the tear strength decrease. Therefore, the upper limit of the amount is 200 parts by weight, preferably 150 parts by weight. A preferred lower limit of the amount of the inorganic filler is 10 parts by weight.

As the inorganic filler, calcium carbonate,
Those usually used as inorganic fillers, such as talc, mica and carbon black, can be used alone or in combination of two or more.

It is extremely effective that the butyl rubber and the crystalline polyolefin contained therein are mixed at a high temperature at least before the resin composition for a spacer according to the present invention is used for final use. The high temperature in this mixing means a temperature higher than the crystalline melting point of the crystalline polyolefin. The mixing temperature must be lower than the decomposition point of butyl rubber, and is preferably about 300 ° C. or lower, which is the normal decomposition point of butyl rubber. In particular, the temperature is preferably 200 ° C. or less from the viewpoint of productivity and the like. Therefore, the crystalline melting point of the crystalline polyolefin is also preferably 200 ° C. or less.

It is more preferable that the resin material for the spacer has as small a change in hardness as possible within the operating temperature range. In order to satisfy these requirements, it is preferable that the crystalline polyolefin has a crystalline melting point higher than the normal upper limit temperature of use. The normal upper temperature limit of the spacer resin material is about 80 ° C.

In the present invention, since the crystalline polyolefin is constrained by the cohesive force of the crystalline phase, the rapid decrease in hardness and the flow state observed in the amorphous resin even in the temperature range exceeding the glass transition temperature are caused by the crystalline melting point. It does not happen below.
Conversely, a remarkable decrease in melt viscosity is seen around the crystal melting point,
The effect of improving the kneadability with the butyl rubber can be expected.

[0031] Such a resin composition may contain a desiccant and additives which can be generally added to a resin material required for a spacer application. Examples of the additive herein include a hydrolyzable silyl group-containing compound such as a lubricant, a pigment, an antistatic agent, a tackifier, a plasticizer, an antioxidant, a heat stabilizer, an antioxidant, and a silane coupling agent. , A foaming agent, and a filler other than the inorganic filler. In particular, when this resin composition is used for a spacer, it is preferable to mix a desiccant such as zeolite, silica gel, and alumina, a tackifier, a plasticizer, a silane coupling agent, and various stabilizers.

In particular, it is preferable that a desiccant such as zeolite is blended in the resin composition in an amount of 5 to 30% by weight. Also, in order to provide a tackifying effect and a plasticizing effect, it is preferable to add 200 parts by weight or less, particularly 5 to 150 parts by weight, of polyisobutylene to 100 parts by weight of butyl rubber other than polyisobutylene.

In view of the above, the particularly preferable compounding ratio of the resin composition for a spacer is 30 to 5 butyl rubber.
5% by weight, crystalline polyolefin 1-8% by weight, inorganic filler 15-30% by weight, desiccant and additives 20-4
0% by weight (of course, the ratio of the butyl rubber to the total amount of the butyl rubber and the crystalline polyolefin is 5%).
0 to 98% by weight, and the ratio of the crystalline polyolefin is 2 to 5
0% by weight).

The above resin composition is preferably produced by mixing at least a butyl rubber and a crystalline polyolefin at a temperature from the crystalline melting point of the crystalline polyolefin to the decomposition point of the butyl rubber. The mixing temperature is 100
To 280 ° C, particularly preferably 120 to 250 ° C. The other components and additives may be mixed simultaneously, and may be mixed before or after the mixing.

The composition of the present invention is substantially a thermoplastic composition, and can be mixed with a conventional mixer such as a melt-mixing extruder or a kneader. Further, molding can be performed continuously with the mixing operation. Alternatively, the composition may be manufactured into a molding material such as a pellet, and then molded. As a molding method, a melt molding method such as an extrusion molding method or an injection molding method can be used.

In addition, the molded article can be manufactured by arranging the molded article at the end of the laminated glass material in which two or more glass plates are arranged opposite to each other, continuously with the molding operation. In this case, by using the high-temperature composition discharged from the molding machine, high adhesiveness to the glass plate can be obtained. In addition, the composition can be applied to a double-glazing material while suppressing a decrease in the temperature of the composition using an apparatus such as an applicator. This device is preferably a device that can be heated.

As described above, the resin composition for a spacer according to the present invention is prepared by kneading the above components. At the time of its preparation, the obtained resin composition is treated with J at 25 ° C.
It is preferable to mix necessary components so that the ISA hardness is 90 or less. The reason is set to 90 or less for the following reason.

When a thermoplastic resin having a JIS A hardness of more than 90 is used as a spacer for a double-glazed glass,
Since creep hardly occurs, JIS R320
When the durability test shown in FIG. 9 is performed, stress due to the expansion of air is applied to the bonding interface between the glass plate and the spacer at a high temperature. For this reason, peeling occurs if the adhesive strength is insufficient,
Even if the adhesive strength is secured, the glass may be broken. With the currently known adhesives, it is possible to obtain the adhesive strength enough to withstand the stress that expands the hollow layer by applying high temperature or high pressure, but applying high temperature and high pressure may cause glass breakage. Therefore, the productivity is remarkably reduced, and therefore, the object of the present invention, which aims at reducing the manufacturing cost, is not met.

On the other hand, if the hardness is too low, there will be a problem in maintaining the shape of the double-glazed glass. Therefore, it is preferable to mix the necessary components so that the JIS A hardness at 25 ° C. of the resin composition becomes 10 or more. Further, even when the JIS A hardness is 10 or more, if the hardness is relatively small, the thickness of the hollow layer may cause a plate displacement if the thickness is large.

The generally used double glazing has a hollow layer thickness of about 4 to 18 mm (6 mm or 1 mm).
2mm). Therefore, when the hardness is relatively small, even if the thickness of the hollow layer is 6 mm, no plate displacement occurs, but if the hollow layer has a thickness of 12 mm, the plate displacement may occur. By making the hardness above 40,
Even if the thickness of the hollow layer is 12 mm, it is possible to prevent the plate from shifting. From this, the JISA hardness of the thermoplastic resin spacer in the double glazing of the present invention is particularly preferably 40 or more.

A double glazing using a resin composition having a JIS A hardness of more than 90 as a spacer has a large stress applied to the glass plate. Therefore, glass breakage occurs during the accelerated durability test in any of the double-glazed glasses using the glass plates having a thickness of 5 mm and a thickness of 3 mm specified in JIS R3209.

On the other hand, a double glazing using a resin composition having a JIS A hardness of 90 as a spacer has a thickness of 5 m.
In the above-described test, no glass break occurs in the double glazing using a glass plate of m. On the other hand, double-glazing using a glass plate having a thickness of 3 mm was likely to cause glass breakage in the above test. Therefore, JIS of the resin composition for spacer
The upper limit of the A hardness is preferably 90. In the case of a double-glazed glass using a resin composition having a JIS A hardness of 75 as a spacer, no glass breakage occurs in the above-described test with any of the double-glazed glass having a thickness of 5 mm and a thickness of 3 mm. . Since the glass plate for double-glazing which is currently generally used has a thickness of 3 mm, the JIS A hardness of the resin composition for spacers is more preferably in the range of 40 to 75.

The water vapor transmission coefficient of the resin composition as a whole is 5000 × 10 ⁻¹³ cm ³ · cm / cm ² · sec.
c · Pa or less, and a water vapor transmission coefficient of 500 × 10 ⁻¹³ cm ³ · cm / cm ² · s in order to maintain the dew point performance.
ec · Pa or less is preferable.

In this case, the butyl rubber has a water vapor transmission coefficient of 3000 × 10 ⁻¹³ cm ³ · cm / cm ² · s.
It is preferably at most ec · Pa. The water vapor transmission coefficient of the crystalline polyolefin is 3000 × 10 ^-13 c
m ³ · cm / cm ² · sec · Pa or less, preferably 5
It is more preferably at most 00 × 10 ^-13 cm ³ · cm / cm ² · sec · Pa.

The glass sheet used in the construction of the double-glazed glass of the present invention is generally a glass sheet such as a window or a door widely used in building materials, vehicles, etc., a tempered glass, a laminated glass,
Glass plates with a thin coating of metal or other inorganic material on the inner surface, such as glass with metal mesh, heat-absorbing glass, heat-ray reflecting glass, low-reflectance glass, etc., acrylic resin plates called organic glass, polycarbonate plates, etc. And is not particularly limited. Further, the double glazing may be composed of two glass plates, or may be composed of three or more glass plates.

The double-glazed glass of the present invention is prepared by applying an adhesive dissolved in a solvent to the glass surface to which the spacer abuts, if necessary, and air-drying the glass, as shown in FIG.
a and 1b are held at predetermined intervals (for example, 6 mm and 12 mm), and then the above-mentioned resin composition of the present invention is added to, for example, 150 mm using a general-purpose extruder having a cylinder having an appropriate diameter as shown in FIG. It is formed by melting at a temperature of about 200 ° C., extruding from a die having an appropriate tip shape, and cooling while interposing between two glass plates.

This method of forming a double-layer glass is merely an example, and the method for producing a double-layer glass of the present invention is not limited to the above method.
For example, a spacer having a desired shape may be formed in advance from the resin composition, and may be formed by thermocompression bonding with, for example, two glass plates.

[0048]

Next, the present invention will be described more specifically with reference to examples and comparative examples, but the present invention is not limited to these examples.

{Example of Resin Composition for Spacer} First, the composition contains a butyl rubber and a crystalline polyolefin, and the proportion of the butyl rubber is 50 to 98% by weight and the proportion of the crystalline polyolefin is 2 to 2 based on the total amount of both. The resin composition for a spacer, which is 50% by weight, contains a butyl rubber, a crystalline polyolefin, and an inorganic filler, and the ratio of the butyl rubber to the total amount of the butyl rubber and the crystalline polyolefin is 5%.
0 to 98% by weight, and the ratio of the crystalline polyolefin is 2 to 5
0% by weight, and the ratio of the inorganic filler to the total 100 parts by weight of the butyl rubber and the crystalline polyolefin is 2%.
Examples relating to a resin composition for a spacer of not more than 00 parts by weight will be described. The following composition examples 1 to 5 are examples, and composition examples 6 to 10 are comparative examples.

[Composition Example 1] In the compositions shown in Table 1,
After kneading the components excluding the desiccant, a desiccant consisting of 4A type dried zeolite powder was added, and further kneaded to uniformly disperse the desiccant to obtain a resin composition for a spacer having a JIS A hardness of 65.

[Composition Examples 2 to 10] JIS after mixing zeolite with the composition shown in Table 1 in the same procedure as in Composition Example 1
A resin composition for a spacer having the A hardness shown in Table 2 was obtained.

In these tables, butyl rubber has a Mooney viscosity of 47 ML (1 + 8) at 100 ° C., and partially cross-linked butyl rubber has a Mooney viscosity of 45 ML.
(1 + 3) Partially crosslinked butyl rubber at 121 ° C, HDP
E is a high-density polyethylene having a melt index of 20, a crystal melting point of 130 ° C. and a crystallinity of about 80%. Also,
JIS A hardness was measured according to JIS K6301. The numerical values of the composition of the materials represent% by weight.

{Examples of Double-Layer Glasses}
An example in which a double glazing is manufactured using the resin composition for spacers No. 10 will be described. The following Examples 1 to 5 are Examples, and Examples 6-1
0 is a comparative example.

[Example 1] The resin composition for a spacer of Composition Example 1 was preliminarily treated with a spacer extruder at a spacer abutment portion using a rubber extruder having a cylinder having a diameter of 40 mm. The size was 320 × 500 mm, and the thickness was 3 mm or 5 mm. A spacer of 6 mm or 12 mm was maintained between the two float glass plates, and a spacer was extruded on the outer periphery of the glass plate to obtain a double-glazed glass of the present invention.

[Examples 2 to 10] Double-layer glass was obtained in the same procedure as in Example 1, except that the resin compositions for spacers of Composition Examples 2 to 10 were used.

[Evaluation method] Plate slip resistance test: A glass plate on one side of each of the obtained double-glazed glasses was fixed, and a load of 13 kg was applied to the other glass plate.
The amount of downward movement of the glass plate on the load side was measured at a temperature of 5 ° C. Those whose movement amount was 0.5 mm or less in 20 minutes were regarded as acceptable. Accelerated endurance test: thickness 6 according to JIS R3209
The test was performed on a double-glazed glass having a spacer of mm. Dew point measurement: Measured according to the device and method described in JIS R3209. Table 2 shows the measurement results.

[0057]

[Table 1]

[0058]

[Table 2]

In the table, evaluation items A to H and evaluation results a to
c has the following meaning.

A: Initial dew point (highest dew point among the six bodies), B: Dew point (° C.) after completion of JIS R3209 accelerated endurance test, C: Dew point (° C.) after end of JIS R3209 accelerated endurance test, Class 2 D: Dew point (° C.) after completion of Class 3 JIS R3209 accelerated durability test, E: Judgment according to JIS Class 3, F: Thickness (5 mm / 6 mm / 5 m) during the durability test
m: glass breakage (in 100 bodies) of the double-layer glass of glass plate / hollow layer / glass plate), G: thickness (3 mm / 6 mm / 3 m) during the durability test
(m: glass plate / hollow layer / glass plate), glass breakage (in 100 bodies) of double-glazed glass, H: plate misalignment, a: dew point -60 ° C or lower, b: glass breakage due to hard spacer, c : The thickness of the hollow layer is 12 mm, and the thickness is 6 mm.

From the results shown in Table 2, the spacer contains butyl rubber and crystalline polyolefin, and the ratio of butyl rubber to the total amount of both is 50 to 98% by weight, and the ratio of crystalline polyolefin is 2 to 50% by weight. A resin composition,
Or a butyl rubber, a crystalline polyolefin, and an inorganic filler, wherein the ratio of the butyl rubber to the total amount of the butyl rubber and the crystalline polyolefin is 50 to 98% by weight, and the ratio of the crystalline polyolefin is 2 to 50% by weight. And the total of the butyl rubber and the crystalline polyolefin is 10
By molding from a resin composition in which the ratio of the inorganic filler to 0 part by weight is 200 parts by weight or less, it is possible to reduce glass breakage of the multi-layer glass and to prevent sheet slippage. In this case, a double-glazed glass in which the shape of the double-glazed glass is maintained without increasing the dew point by using only the above resin composition as the spacer is obtained.

In the resin composition for a spacer used in the double-glazing of Example 5, the ratio of the butyl rubber to the total amount of the butyl rubber and the crystalline polyolefin was 98.08% by weight, and the ratio of the crystalline polyolefin was 98.08% by weight. Is 1.92% by weight. On the other hand, in the case of the double glazing of Example 5, slight plate displacement may occur depending on the thickness of the hollow layer. From this,
The fact that the proportion of the butyl rubber is 50 to 98% by weight and the proportion of the crystalline polyolefin is 2 to 50% by weight based on the total amount of the butyl rubber and the crystalline polyolefin means that the composition ratio of the composition example 5 is substantially the same. It can be seen that the mixing ratios as in Composition Examples 1 to 4 are preferable, although they are included.

[0063]

According to the present invention, the work of filling the secondary sealing material is reduced, the curing time is not required, the number of steps in the production of the double-glazed glass can be greatly reduced, and the double-glazed glass is produced. Provided with high productivity and low cost.

[Brief description of the drawings]

FIG. 1 is a partial schematic cross-sectional view showing an example of the configuration of a double glazing of the present invention.

FIG. 2 is a partial schematic cross-sectional view showing a configuration of a double-glazed glass before being multi-layered using a spacer made of a thermoplastic resin composition.

FIG. 3 is a schematic diagram of an extruder used for melting a thermoplastic resin composition in the present invention.

FIG. 4 is a cross-sectional view showing an example of the configuration of a conventional double-glazing unit.

FIG. 5 is a cross-sectional view showing an example of the configuration of a conventional double glazing.

[Explanation of symbols]

 10: Insulated glass 1a, 1b: Glass plate 20: Spacer 30: Hollow layer

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Yoshitaka Matsuyama 1150 Hazawa-cho, Kanagawa-ku, Yokohama-shi, Kanagawa Prefecture Asahi Glass Co., Ltd. Central Research Laboratory

Claims (6)

[Claims] 1. A double-glazed structure in which two or more glass plates are opposed to each other with a spacer interposed therebetween so as to form a hollow layer, wherein the spacer is made of butyl rubber and crystalline polyolefin. Wherein the ratio of butyl rubber to the total amount of both is 50 to 98% by weight, and the ratio of crystalline polyolefin is 2 to 50% by weight. Double glazing. 2. A double-glazing system in which two or more glass plates are opposed to each other with a spacer interposed therebetween so as to form a hollow layer therebetween, wherein the spacer comprises a butyl rubber and a crystalline polyolefin. And the inorganic filler, wherein the proportion of the butyl rubber to the total amount of the butyl rubber and the crystalline polyolefin is 50 to 98% by weight, and the proportion of the crystalline polyolefin is 2 to 50% by weight. A multilayer glass using a resin spacer, comprising a thermoplastic resin composition in which a ratio of an inorganic filler to a total of 100 parts by weight of a functional polyolefin is 200 parts by weight or less. 3. The double-glazed glass according to claim 1, wherein the crystalline polyolefin comprises one or more polymers selected from polyethylene, polypropylene and modified products thereof. 4. The crystalline polyolefin has a water vapor transmission coefficient of 3000 × 10 ⁻¹³ cm ³ · cm / cm ² · sec.
The multilayer glass according to claim 1, 2 or 3, which has a pressure of not more than Pa. 5. The butyl rubber has a water vapor transmission coefficient of 300.
The double-glazed glass according to claim 1, 2, 3 or 4, which has a ^{pressure of} 0 × 10 ⁻¹³ cm ³ · cm / cm ² · sec · Pa or less. 6. The thermoplastic resin composition has a water vapor transmission coefficient of 5000 × 10 ⁻¹³ cm ³ · cm / cm ² · sec.
The multilayer glass according to claim 1, 2, 3, 4, or 5, which has a pressure of Pa or less.