JP2007277052A - Spacer for multiple glass, multiple glass and method of manufacturing spacer for multiple glass - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a spacer for multiple glass which is free from causing deformation strain in a primary seal of the peripheral part of the multiple glass due to the expansion or the shrinkage of a multiple glass air layer with the temperature fluctuation by the repetition of heating and cooling of the multiple glass under a practical use environment and free from causing adverse effect such as the deterioration of mechanical charcteristics or the deterioration of water vapor permeation performance while having a conventional function that the inside air layer of the multiple glass is kept in a drying state, the multiple glass and a method of manufacturing the space for the multiple glass. <P>SOLUTION: The spacer of multiple glass includes a hollow interval holding member and a moisture prevention layer. The moisture prevention layer is arranged to cover a member facing the outside of the hollow interval holding member and a part from a site facing the outside of the hollow interval holding member of the moisture preventing layer to a site where the hollow interval holding member is opposed to a glass plate follows the deformation. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a spacer structure / configuration of a seal portion in a multilayer glass for the purpose of heat insulation.

  The double-glazed glass usually refers to a glass peripheral part fixed, adhered, sealed or the like so that a plurality of glass single plates are arranged in parallel at a predetermined interval. Usually, only glass single plates are often used, but transparent organic materials are used for reasons such as using laminated glass as a component plate, combining single plates made of transparent organic materials, or making glass difficult to break. The case where a laminated plate is used as at least one component plate is also included.

  The purpose of using double glazing is generally to prevent heat from entering and exiting the window glass itself, and to provide a so-called heat insulation effect to the entire window. -By sealing, it is necessary to form an internal air layer which is a hollow layer isolated from the outside between a plurality of glass plates. At this time, it is important to maintain the internal air layer in a dry state in order to prevent condensation in the internal air layer and maintain the transparency of the multilayer glass itself.

  In order to maintain the effect of such multi-layer glass for a long period of time, it is necessary to have an appropriate glass periphery sealing structure. FIG. 7 is a schematic cross-sectional explanatory diagram of a multi-layer glass 1 having a conventional seal configuration. As shown in FIG. 7, the structure maintains the glass plate in parallel and in a predetermined thickness, maintains the adhesion between the spacer 3 and the glass plate 2 over a long period of time, and A primary seal 6 made of a material having low water vapor permeability for maintaining the dry state of the internal air layer over a long period of time, and a secondary seal 7 for bonding and fixing these members and glass Consists of.

  As the primary seal 6, butyl rubber which is not usually subjected to crosslinking treatment or a material based on polyisobutylene and containing a filler such as carbon black for the purpose of coloring and reinforcement is used. As the secondary seal, a material based on a curable elastomer such as polysulfide, silicone, urethane, etc., which has been appropriately modified in order to develop adhesiveness with glass is used.

  As the spacer 3, a metal spacer mainly made of aluminum is usually used in many cases. However, when it is necessary to reduce the heat conduction around the multi-layer glass, the heat conductivity is relatively small. A material made of stainless steel or hard resin, which is a metal, is also used.

  As shown in FIG. 7, the spacer 3 further has a hollow portion 9 in its cross section, and takes a form in which a water vapor adsorbent such as granular zeolite can be contained. Such a water vapor adsorbent plays a very important role in keeping the dry state in the air layer inside the double-glazed glass below a predetermined dew point. In other words, in the case of such a double-layer glass, the water vapor gas that has passed through both the primary and secondary sealing materials is adsorbed and fixed by the water vapor adsorbent held in the spacer, so that This is because the inside of the air layer is kept dry.

  Therefore, double-layer glass that has been used for a long time has permeated water beyond the adsorption capacity of the water vapor adsorbent held and loaded in the spacer from the beginning, and penetrated into the interior, increasing the dew point of the internal air layer. However, when the external environmental temperature is exceeded, so-called internal condensation occurs, and the transparency that the double-glazed glass originally has is impaired and the life is reached.

  On the other hand, it is known that in a practical use environment, a multilayer glass is subjected to repeated heating and cooling temperature history. In such a case, the internal air layer sealed in the hollow layer of the double-glazed glass is expanded in the expansion direction when the internal air layer is exposed to a temperature higher than the sealing temperature, and is contracted in the contraction direction when the temperature is lower than the sealing temperature. The volume of the internal air layer changes, and the glass plate constituting the multilayer glass is deformed outward or inward. At this time, both primary and secondary seals that fix, adhere and seal glass plates and spacers at the periphery of the multi-layer glass cause deformation distortion, and adverse effects such as deterioration of both mechanical properties and water vapor permeation resistance performance. It is also well known to cause

  When collecting and observing the cross-sectional shape of the multi-layer glass that has actually been used in a long-term real environment, the shape of the primary sealed initial seal is very different from that immediately after manufacture, and there are various types of bubbles inside and outside. In some cases, the destruction of the seal portion, particularly the primary seal portion, may be observed remarkably. In this case, even though the material itself has sufficient water vapor permeation resistance, the seal, particularly the primary seal, is destroyed in the actual use environment, and the water vapor permeation performance is lost. is doing.

  In Japanese Patent Laid-Open No. 6-185267, a conventional multilayer glass has a temperature history cycle of heating from 35 ° C. to 75 ° C. and then cooling from 75 ° C. to 35 ° C. It shows that the dew point inside the air layer varies, and as a countermeasure, the primary seal needs to satisfy an amount within a predetermined range. By increasing the initial thickness of the primary seal, the strain that is the ratio of the deformation and the initial thickness can be reduced even if the amount of deformation applied to the primary seal by the volume expansion in the air layer is the same, and the seal breaks. It is shown that the occurrence of can be prevented. However, in this case as well, the distortion itself is not added to the primary seal itself, and although the effect of stabilizing the quality as invented by the inventor is effective, the water vapor permeability resistance of the primary seal immediately after manufacture is seen. Was not maintained and was insufficient from the viewpoint of durability.

Among the patents disclosing the prior art using the conventional metal spacer, the metal spacer itself is deformed as shown in Japanese Patent Publication No. 2003-509324 and Japanese Patent Publication No. 61-5000737, and the primary seal is deformed and fractured. A technique for suppressing the above is disclosed. However, the primary seal that is usually used has a Young's modulus of approximately 10 ⁶ to 10, although it depends on the tensile speed, particularly in a temperature environment of room temperature or higher where strain in the tensile direction due to volume expansion of the air layer is applied. It is known to be ⁸ Pa. On the other hand, since the material used for the spacer is a metal, it is 10 ⁹ to 10 ¹⁰ Pa in the same temperature range, and the difference between them will also reduce the strain applied to the primary seal. However, as the difference in elastic modulus shows, it cannot be expected to have a great effect.

  In response to this problem, the pamphlet of International Publication No. 01/27429 has a structure that can cope with the deformation in the primary seal in order to prevent the deterioration of the water vapor permeation performance against the deformation of the conventional primary seal. Proposed examples are proposed. However, in recent years, the production of double-glazed glass has been automated, and it is difficult to arrange a strip-like one around the glass plate in such a production automation line. The presence or absence of adaptability to the production line has a great influence on the merchantability of the multi-layer glass including the cost, and if it cannot be applied to this, it must be said that there is a serious defect in the merchantability. Furthermore, the double-glazed glass has the most main rectangular shape, and it is particularly difficult to cope with the corner portion in the strip-like primary seal shape proposed in the pamphlet of International Publication No. 01/27429.

  In the case of a double-glazed glass using a resin spacer having a cross-sectional shape that does not use a metal spacer as disclosed in JP-A-55-101690, it is difficult to cause a decrease in water vapor permeation resistance due to temperature history as described above. This type of double-glazed glass cannot be applied to the high-productivity automated line that has been developed for double-glazed glass using conventional aluminum spacers. Inferior industrial productivity.

  As described above, there are many prior inventions that have been proposed with high durability, high performance, and low cost, but it is difficult to say that both have been solved at the same time.

JP-A-6-185267 Special table 2003-509324 gazette JP-T 61-500737 International Publication No. 01/27429 Pamphlet JP-A-55-101690

  The present invention has been made in view of the above circumstances, and is a multilayer glass spacer, which has a conventional function of maintaining the inner air layer of the multilayer glass in a dry state, and is used in an actual use environment. Below, mechanical properties are reduced and water vapor resistance is reduced without causing deformation distortion in the primary seal at the periphery of the double-glazed glass due to expansion and contraction of the double-glazed glass air layer due to repeated temperature changes in heating and cooling of the double-glazed glass. Provided are a method for producing a multilayer glass spacer, a multilayer glass, and a multilayer glass spacer which do not cause adverse effects such as a decrease in transmission performance.

  In order to achieve the above object, the invention according to claim 1 is a double-glazed glass spacer disposed so as to form a hollow layer between the glass plates constituting the double-glazed glass, A hollow interval holding member that holds the gap between the glass plates, and a moisture-proof layer that has a function of preventing moisture from entering the hollow layer from the outside, so as to cover a portion facing the outside of the hollow interval holding member A moisture-proof layer is arranged so that the hollow space holding member and the secondary seal of the multilayer glass are not in direct contact, the moisture-proof layer is made of a flexible film-like member, and the hollow space holding member It has a glass deformation follow-up portion extended from a portion facing the outside to a portion where the hollow interval holding member and the glass plate face each other, and the glass deformation follow-up portion is independent of the hollow interval holding member. Multi-layered To provide a spacer for the nest.

  According to a second aspect of the present invention, there is provided the multilayer glass spacer according to the first aspect, wherein the hollow space holding member and the moisture-proof layer are adhered or adhered to at least a part of the portion facing the outside of the hollow space holding member. It is fixed by processing.

  According to a third aspect of the present invention, there is provided the multilayer glass spacer according to the first or second aspect, wherein the hollow space holding member and the moisture-proof layer are formed from a portion facing the outside of the hollow space holding member. In the glass deformation follow-up part extended to a portion where the glass plate and the glass plate face each other, the glass plate is not fixed.

  According to a fourth aspect of the present invention, in the multilayer glass spacer according to any one of the first to third aspects, the hollow spacing member is a metal.

The invention described in claim 5 is characterized in that the multilayer glass spacer according to any one of claims 1 to 4 is such that the moisture-proof layer is any one of the following films (1) to (3). And (1) Metal film. (2) An organic multilayer film having a metal vapor deposited film in at least one layer. (3) An organic film having a moisture permeability of 4 × 10 ⁻³ g / m ² · hr when one side of the organic film is held at 60 ° C. and 90% RH and the other side is held at 60 ° C. and 0% RH. An organic film that is:

According to a sixth aspect of the present invention, in the multilayer glass spacer according to any one of the first to fifth aspects, the elastic modulus of the film forming the moisture-proof layer is eMPa, the cross-sectional second moment is Icm ⁴ , and the hollow When the length of the moisture-proof layer film of the glass deformation following portion stretched from the portion facing the outside of the spacing member to the portion where the hollow spacing member and the glass plate face each other is expressed as e · I / L ⁴ Is 1.25 MPa or less.

  The invention according to claim 7 is that when the spacer for multilayer glass according to any one of claims 1 to 6 is disposed in the multilayer glass, the spacer is processed into a rectangular shape by bending. Features.

  According to an eighth aspect of the present invention, there is provided at least two glass plates, a spacer interposed in a peripheral portion of the glass plate so that a hollow layer is formed between the glass plates, the spacer and the glass. A primary sealing material interposed between the plate and a secondary sealing material filled in a recess formed by a base surface on the side not facing the hollow layer of the spacer and the peripheral edge of the glass plate, The spacer includes a hollow space holding member that holds a space between the glass plates, and a moisture-proof layer that has a function of preventing moisture from entering the hollow layer from the outside. The moisture-proof layer is arranged so as to cover the portion facing the outside of the hollow space holding member when incorporated in the double glass, and the hollow space holding member and the secondary seal of the double glass are configured not to contact directly, The moisture barrier is acceptable A glass deformation follower extending from a portion facing the outside of the hollow space holding member to a portion where the hollow space holding member and the glass plate are opposed to each other, the glass deformation A composite seal, wherein the glass plate and the spacer according to any one of claims 1 to 7 are adhesively bonded with a primary sealant interposed between the follower and the glass plate. Provide layer glass.

  The invention according to claim 9 is the multilayer glass according to claim 8, wherein the ratio of the thickness / length of the primary seal existing between the glass deformation follower and the glass plate is 0.15 or less. It is characterized by being.

  Invention of Claim 10 is a manufacturing method of the spacer for multilayer glass in any one of Claim 1-7, Comprising: As for the said moisture-proof layer, the adhesion process is given to one part beforehand, The said adhesion process part And a portion facing the outside of the hollow space holding member is fastened, and the glass deformation following portion is wound around the outer periphery of the hollow space holding portion.

  According to the present invention, it has the conventional function of maintaining the internal air layer of the double-glazed glass in a dry state. Multilayer with a long product life because it does not cause deformation distortion in the primary seal around the multilayer glass due to the expansion and contraction of the layer, and does not cause adverse effects such as deterioration of mechanical properties and water vapor permeation resistance. Glass can be provided.

  Hereinafter, preferred embodiments of the double-glazed glass of the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a schematic cross-sectional explanatory view of a spacer 3 and a multilayer glass 1 according to the present invention.

  As shown in FIG. 1, the multi-layer glass 1 according to the present invention is formed on the periphery of the glass plates 2 and 2 so that a hollow layer 8 having a predetermined thickness is formed between the two glass plates 2 and 2. A spacer 3 is arranged. In order to prevent entry of water vapor from the outside, a primary seal 6 made of a material having low water vapor permeability is interposed between the spacer 3 and the glass plates 2 and 2. Further, in order to adhere and fix the glass plates 2, 2, the spacer 3, and the primary seal, the secondary seal 7 is adhered to the concave portion formed by the portion facing the outside of the spacer 3 and the glass plates 2, 2. .

  The spacer 3 is composed of a glass plate 2, a hollow space holding member 4 that holds the space between each other, and a moisture-proof layer 5 made of a film-like member having a function of preventing moisture from entering the hollow layer from the outside and flexibility. The

  The hollow spacing member 4 is a long object having a hexagonal cross section having a substantially right angle at both ends of one side, and a surface having the substantially right angle at both ends is disposed on the hollow layer 8 side. By doing in this way, the glass plates 2 and 2 are hold | maintained substantially parallel. Further, since the spacer 3 is formed into a rectangular shape by bending with respect to the surface on the side of the hollow layer 8 when the spacer 3 is normally assembled as the double-glazed glass 1, the portion facing the outside of the hollow spacing member 4 in this way It is preferable not to place an acute angle on the surface. When the rectangular spacer 3 is assembled, the corners of the rectangle may be connected using a key material, but it is more preferable to perform bending from the viewpoint of productivity.

  Moreover, the hollow space | interval holding member 4 has the hollow part 9 in the cross section, contains water vapor | steam adsorption agents (not shown), such as a granular zeolite, in it, and the several water vapor | steam adsorption agent on the surface at the side of the hollow layer 8 The opening 4a is smaller than the diameter. The water vapor gas that has passed through both the sealing materials of the primary seal 6 and the secondary seal 7 and has entered the hollow layer 8 is adsorbed and fixed by the water vapor adsorbent through the opening 4a, and the hollow layer 8 is kept dry. The The material of the hollow spacing member 4 is usually a metal whose main material is aluminum, but stainless steel and hard resin may be used, but aluminum is the main material from the viewpoint of water resistance, weight reduction, strength, and workability. The metal to do is particularly good.

  When the moisture-proof layer 5 is assembled as the multilayer glass 1, the portion 4 c facing the outside of the hollow space holding member 4, that is, the portion opposite to the hollow layer 8, the hollow space holding member 4 and the glass plate 2 Are arranged in the facing part 4b and are arranged so that the hollow gap holding member 4 and the secondary seal 7 are not in direct contact with each other at the part facing the outside of the hollow gap holding member 4. The moisture-proof layer 5 is fixed by adhesion or adhesion processing in at least a part of the hollow space holding member 4 and the portion 4c facing the outside of the hollow space holding member 4. Further, the glass deformation follow-up portion 5a extended from the portion 4c facing the outside of the hollow space holding member 4 of the moisture-proof layer 5 is not fixed to the hollow space holding member 4 when assembled as a double-glazed glass. It is fixed to the glass plate 2 through a seal 6. With this structure, the outside and the hollow layer 8 are partitioned by the moisture-proof layer 5 and the primary seal 6 made of a material having low water vapor permeability, so that almost no water vapor gas enters from the outside.

  Since the glass follower 5a follows the glass plate 2 when the multi-layer glass 1 is exposed to a temperature higher than the temperature at which the hollow layer 8 is sealed and expands and the glass plate 2 tries to spread outward, the primary seal 6 And the glass follower 5a which is a part of the moisture-proof layer 5 is not peeled off, and the primary seal 6 is not damaged. Further, since the moisture-proof layer 5 is fixed by adhesion or adhesion processing in at least a part of the hollow space holding member 4 and the portion 4c facing the outside of the hollow space holding member 4, it is easy to handle in the manufacturing process and to an automated line. Applicable.

The material of the moisture-proof layer 5 is a metal film, an organic multilayer film having at least one metal vapor-deposited film, or an organic film. One side of the organic film is 60 ° C. and 90% RH, and the other side is 60 ° C. and 0% RH. Preferably, the organic film has a moisture permeability of 4 × 10 ⁻³ g / m ² · hr or less.

Further, the elastic modulus of these films is eMPa, the second moment of section is Icm ⁴ , and the glass stretched from the portion 4c facing the outside of the hollow interval holding member 4 to the portion where the hollow interval holding member 4 and the glass plate 2 face each other. When the length of the deformation follower 5a is Lcm, e · I / L ³ is preferably 0.25 MPa or less. If e · I / L ³ exceeds 0.25 MPa, the primary seal 6 may break because the glass follower 5a cannot follow the deformation of the glass, particularly in the temperature region where the hollow layer 8 expands. In addition, although the thickness of the moisture-proof layer 5 changes with materials, it is preferable that it is 0.005 mm or more and 0.2 mm or less, for example in soft aluminum.

  FIG. 2 is an explanatory view showing an example of a manufacturing method of the spacer 3 according to the present invention. As shown in FIGS. 2 (a) to 2 (c), (a) First, a part of the moisture-proof layer 5 made of a flexible film is preliminarily adhered or bonded, and (b) the adhesive or bonded part. 11 is integrated so that only the portion 4c facing the outside of the hollow space holding member 4 is brought into contact with the surface of the spacer 3 when it is incorporated into the multilayer glass, and (c) the other part of the film is formed into the hollow space. The holding member 4 and the glass plate 2 are wound around the outer periphery of a portion 4b facing each other. Thus, it has the hollow space | interval holding member 4 which hold | maintains the space | interval of the glass plates 2, and the moisture proof layer 5 which has a function which prevents the water | moisture content permeation into the hollow layer 8 from the outside, and the moisture proof layer 5 maintains a hollow space | interval. The member 4 and the secondary seal 7 of the multilayer glass 1 are arranged so as to cover the portion 4c facing the outside of the hollow space holding member 4 so that the member 4 and the secondary seal 7 of the multilayer glass 1 are not in contact with each other. It is possible to obtain the spacer 3 having the glass deformation follower 5a that extends from the portion 4c facing the outside to the portion 4b where the hollow interval holding member 4 and the glass plate 2 face each other and independent of the hollow interval holding member 4.

  The primary seal 6 is preferably butyl rubber which is not usually subjected to a crosslinking treatment or a polyisobutylene base containing a filler such as carbon black for the purpose of coloring and reinforcement. Further, as the secondary seal, a material based on a curable elastomer such as polysulfide, silicone, urethane, or the like, which has been appropriately modified in order to exhibit adhesiveness with glass is preferable.

  Further, the primary seal 6 interposed between the glass deformation follow-up portion 5a and the glass plate 2 has a length L6 in the direction of the hollow layer 8 from the outside of the spacer 3 from both the viewpoint of moisture permeation resistance and the viewpoint of adhesive strength. The longer the thickness, the better, and the thinner the thickness t6 that is equivalent to the distance between the spacer 3 and the glass plate 2, the better. In order to have substantial durability, the ratio of t6 / L6 is particularly preferably 0.15 or more.

  FIG. 3 is a schematic cross-sectional explanatory view of another example of the spacer 3 and the multilayer glass 1 according to the present invention. FIG. 3A is an example in which the moisture-proof layer 5 is caulked with at least a part of the caulking portion 12 in a portion where the spacer 3 of the spacer 3 and the glass plate 2 face each other, and FIG. FIG. 3C shows an example in which the portion 5a is extended to cover a part of the surface of the hollow space holding member 4 on the hollow layer side. FIG. 3C shows the spacer 3 on the surface of the hollow space holding member 4 on the hollow layer 8 side. A flat bar 13 projecting a predetermined length that does not contact the glass plate 2 is disposed on the glass plate 2 side from a portion where the spacer 3 and the glass plate 2 face each other, and the glass deformation follow-up portion 5a is disposed on the flat bar 13. This is an example in which the glass plate 2 is bent at a close position at a substantially right angle so as not to contact the glass plate 2, both of which facilitate bending of the spacer 3 and handling of the spacer 3 in the production of multilayer glass. To do.

  The spacer 3 in the present invention has a function of maintaining the distance between the glass plates 2, a function of preventing moisture from entering the hollow layer from the outside, an internal water vapor adsorption function, and a load on the primary seal following the glass plate 2. There is no particular limitation on the specific shape as long as it has a function not to be applied.

Hereinafter, based on an Example, it explains in full detail about preferable embodiment of the multilayer glass of this invention.
FIG. 4 is a cross-sectional view of the hollow spacing member 4 according to the embodiment of the present invention, and FIG. 5 is an explanatory diagram of the structure of the double glazing according to the embodiment of the present invention. As shown in FIG. 4, in the cross section of the hollow space holding member 4, the length of the portion facing the hollow layer of the hollow space holding member 4 is set to A and parallel to the glass plate 2 when assembled as a multilayer glass. The length of the facing portion 4b is B, the length in the direction parallel to the glass plate 2 of the portion 4c facing the glass plate 2 and facing the outside of the hollow space holding member 4 is C, and the outside of the hollow space holding member 4 4c, the length of the portion substantially perpendicular to the glass plate 2 is D, and the thickness of the hollow spacing member 4 is E. In this embodiment, A = 11.0 mm, B = 4.6 mm. C = 2.4 mm, D = 6.5 mm, E = 0.6 mm. The cross-sectional shape is symmetrical.

  First, the hollow interval holding member 4 having the cross-sectional shape shown in FIG. 4 was prepared by an extrusion molding machine, and the moisture-proof layer 5 was adhered to the hollow interval holding member 4 by the method shown in FIG. The hollow spacing member 4 is made of two materials, aluminum (Al) and hard polyvinyl chloride (hard PVC). The moisture-proof layer 5 is made of an aluminum film (Al film) and an aluminum film coated with an adhesive ( Al film 2), SUS film (SUS film) coated with pressure-sensitive adhesive, polyethylene terephthalate / aluminum vapor-deposited film / polyethylene terephthalate (PET / Al vapor-deposited film / PET) (thickness structure 12 μm / 12 μm / 12 μm), pressure-sensitive adhesive coated Four types of polystyrene films (PS films) were used. Among these, as a method of applying the adhesive material, each film wound in a roll shape is continuously fed out and dissolved in hexane at a concentration of 1% by weight in the center of the film in the width direction of 11.3 mm. The prepared poisobutylene solution was continuously applied and dried.

The aluminum spacer 3 having the moisture-proof layer 5 is folded into a rectangle with an inner dimension of 330 × 480 mm by a buyer 's automatic folding machine, and 1 g of granular 3A zeolite as a water vapor absorbent is put into the hollow portion of the hollow spacing member 4. The both ends of the spacer 3 were joined using a commercially available aluminum spacer joining key to form a rectangle as shown in FIG. Further, the spacer 3 made of hard polyvinyl chloride having the moisture-proof layer 5 is cut into two pieces of 330 mm in length and two pieces of 480 mm, and 1 g of granular 3A zeolite as a water vapor absorbent is put in the hollow portion of the air gap holding member 4. After that, it was rectangularized using a commercially available corner key.

  The granular 3A zeolite was heat-treated at 100 ° C. for 2 hours or more before encapsulation, and encapsulated in a state where the adsorption ability was sufficiently activated. Table 1 shows the dimensions and materials of the medium space angle holding member 4 used in each example and comparative example, and the dimensions and materials used for the moisture-proof layer 5.

  Next, two float glass plates having a thickness of 5 mm were cut into a size of 350 × 500 mm and washed with a commercially available glass washer. Next, a butyl seal (SM488 manufactured by Yokohama Rubber Co., Ltd.) is applied to the rectangular spacer 3 manufactured as described above using a general-purpose butyl seal application line, and a weight of 2.5 g / m is applied to two surfaces facing the glass plate 2. Attached. The spacer 3 was affixed to one of the cleaned glass plates, and another glass was further stacked to apply a load uniformly over the entire surface, so that the thickness between the glass plates 2 and 2 was 22.0 mm. Finally, a polysulfide sealant (SM8000 manufactured by Yokohama Rubber Co., Ltd.) was applied around the assembled structure to produce a multilayer glass 1 for evaluation tests. In addition, this multilayer glass 1 was hold | maintained for 1 week in the temperature range of 20-30 degreeC after preparation, and used for the evaluation test after that.

  In the durability evaluation test, first, the multilayer glass 1 for evaluation test prepared as described above was subjected to a temperature cycle defined as a weather cycle test by ASTM E773 10 times, and allowed to stand at room temperature. The dew point of the hollow layer 8 was measured by a method based on JIS R3209, and used as the initial dew point. Note that UV irradiation and water spraying were not performed, and only temperature changes were made.

  Thereafter, the multi-layer glass 1 was put into a chamber maintained in a temperature and humidity environment of 60 ° C. and 90% RH, held for 10 days, and then taken out, and the dew point of the internal air layer was measured by the same method as described above. This operation was repeated until the dew point in the air layer after exposure to temperature and humidity at 60 ° C. and 90% RH / 10 days exceeded 0 ° C., and the point at which the temperature exceeded 0 ° C. for the first time was defined as the life of the multilayer glass specimen. . FIG. 6 is a control pattern diagram of a temperature cycle defined as a weather cycle test by ASTM E773.

  Next, as a handling evaluation test, the spacer 3 according to the present invention described in the above-described embodiment was introduced into a general-purpose multilayer glass production line using the conventional spacer 3, and the line compatibility was evaluated. Evaluation criteria are 10 pieces of spacers 3 of 5 m length, 20 pieces of float glass having a size of 350 × 500 mm, and a thickness of 5 mm. The case where no problem occurred in the production of the sheets was evaluated as “B”, the case where no problem occurred in the 4th to 7th sheets was evaluated as “Δ”, and the case where only 3 or less sheets could be produced was evaluated as “X”.

  Tables 1 to 3 show the evaluation results of the above examples and comparative examples.

  From Tables 1 to 3, it can be seen that the lifetime in the configuration of the spacer 3 of Examples 1 to 8 is 10 times or more that of Comparative Example 1 which is a conventional product. Moreover, in the structure of the spacer 3 of Example 1 from a viewpoint of handling property, a general-purpose multilayer glass production line remodeling using the conventional spacer 3 is necessary. However, in the structure of the spacer 3 of Examples 2 to 7, It seems that no major modification of the production line is necessary.

  From these evaluation results, the multilayer glass spacer of the present invention has a conventional function of maintaining the inner air layer of the multilayer glass in a dry state, and repeats heating and cooling of the multilayer glass in an actual use environment. It is possible to at least double the life of the double-glazed glass because deformation and distortion are not generated in the primary seal around the double-glazed glass due to the expansion / contraction of the double-glazed air layer accompanying the temperature change. I was able to confirm. Moreover, it has been confirmed that it can be applied to the conventional automatic production line for double-glazed glass.

It is a schematic sectional explanatory drawing of the spacer and multilayer glass which concern on this invention. It is explanatory drawing which shows an example of the manufacturing method of the spacer which concerns on this invention. It is a schematic sectional explanatory drawing of the spacer of another example which concerns on this invention, and the multilayer glass 1. FIG. FIG. 4 is a cross-sectional view of a hollow spacing member according to an embodiment of the present invention. It is explanatory drawing of the structure of the multilayer glass which concerns on the Example of this invention. FIG. 6 is a control pattern diagram of a temperature cycle defined as a weather cycle test by ASTM E773. It is a schematic cross-section explanatory drawing of the double glazing of the conventional sealing structure.

Explanation of symbols

1: double glass, 2: glass plate, 3: spacer, 4: hollow spacing member, 4a: opening 5: moisture-proof layer, 5a: glass deformation follow-up part, 6: 1 primary seal, 7: secondary seal, 8: Hollow layer 9: Hollow part, 11: Adhesion processed part, 12: Caulking part, 13: Flat bar.

Claims (10)

  A spacer for a double-glazed glass that is disposed so as to form a hollow layer between the glass plates constituting the double-glazed glass, the spacer being a hollow gap holding member that holds the gap between the glass plates, and an external A moisture-proof layer having a function of preventing moisture from entering into the hollow layer, and the moisture-proof layer is disposed so as to cover a portion facing the outside of the hollow space-holding member. Constructed so as not to be in direct contact with the next seal, the moisture-proof layer is made of a flexible film-like member, and the hollow spacing member and the glass plate are opposed to each other from the portion facing the outside of the hollow spacing member. And a glass deformation follower that is extended to a portion to be formed, wherein the glass deformation follower is independent of the hollow space holding member.   2. The multilayer glass according to claim 1, wherein the hollow space holding member and the moisture-proof layer are fixed to each other at least in a part facing the outside of the hollow space holding member by adhesion or adhesion processing. Spacer.   The hollow space holding member and the moisture-proof layer are not fixed in the glass deformation following portion extended from a portion facing the outside of the hollow space holding member to a portion where the hollow space holding member and the glass plate face each other. The spacer for multilayer glass according to claim 1 or 2, wherein   The said space | interval holding member is a metal, The spacer for multilayer glass of any one of Claim 1 to 3 characterized by the above-mentioned. The spacer for multi-layer glass according to any one of claims 1 to 4, wherein the moisture-proof layer is any one of the following films (1) to (3).
(1) Metal film.
(2) An organic multilayer film having a metal vapor deposited film in at least one layer.
(3) An organic film having a moisture permeability of 4 × 10 ⁻³ g / m ² · hr when one side of the organic film is held at 60 ° C. and 90% RH and the other side is held at 60 ° C. and 0% RH. An organic film that is: The glass forming the moisture-proof layer has an elastic modulus of eMPa, a cross-sectional second moment of Icm ⁴ , and the glass stretched from a portion facing the outside of the hollow interval holding member to a portion where the hollow interval holding member and the glass plate face each other. 6. The multilayer glass according to claim 1, wherein e · I / L ⁴ is 1.25 MPa or less when the length of the moisture-proof layer film of the deformation following portion is Lcm. Spacer.   The spacer for multilayer glass according to any one of claims 1 to 6, wherein the spacer for multilayer glass is processed into a rectangular shape by bending when interposing the multilayer glass.   At least two glass plates, a spacer interposed at the periphery of the glass plate so that a hollow layer is formed between the glass plates, and 1 interposed between the spacer and the glass plate A secondary glass comprising a secondary sealing material, and a secondary sealing material filled in a recess formed by a base surface on the side not facing the hollow layer of the spacer and a peripheral edge of the glass plate, The spacer has a hollow interval holding member that holds the gap between the glass plates, and a moisture-proof layer that has a function of preventing moisture from entering the hollow layer from the outside, and is hollow when the spacer is incorporated into the multilayer glass. The moisture-proof layer is arranged so as to cover the portion facing the outside of the spacing member, and the hollow spacing member and the secondary seal of the double-glazed glass are not in direct contact with each other, and the moisture-proof layer has flexibility. Film-like part And a glass deformation follow-up portion that extends from a portion facing the outside of the hollow interval holding member to a portion where the hollow interval holding member and the glass plate face each other, the glass deformation following portion and the glass plate A multilayer glass, wherein the glass plate and the spacer according to any one of claims 1 to 7 are adhesively bonded with a primary sealant interposed therebetween.   The multilayer glass according to claim 8, wherein a thickness / length ratio of the primary seal existing between the glass deformation following portion and the glass plate is 0.15 or less. The moisture-proof layer is preliminarily subjected to adhesive processing, fastens the adhesive processing portion and a portion facing the outside of the hollow interval holding member, and winds the glass deformation following portion around the outer periphery of the hollow interval holding portion. The manufacturing method of the spacer for multilayer glass of any one of Claim 1 to 7 characterized by the above-mentioned.

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