JP4529956B2 - Multi-layer glass spacer, multi-layer glass, and method for manufacturing multi-layer glass spacer - Google Patents

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. 6 is a schematic cross-sectional explanatory view of a multi-layer glass 1 having a conventional seal configuration. As shown in FIG. 6, 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, polyurethane, etc., which has been appropriately modified to exhibit adhesiveness with glass, or the like 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. 6, 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 shown by the difference in elastic modulus, it cannot be expected to have a significant effect.

  In response to this problem, WO01-27429 discloses an example in which a structure capable of coping with deformation is provided in the primary seal for the purpose of preventing deterioration of the water vapor permeation resistance against deformation of the conventional primary seal. Has 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. Further, the rectangular shape of multilayer glass is most mainstream, and it is particularly difficult to cope with the corner portion with the steel strip primary seal shape proposed in WO01-27429.

  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 WO01-27429 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 to form a hollow layer between 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 follower extending from a portion facing the outside to a portion where the hollow spacing member and the glass plate face each other, and has a width of 1 mm at both ends which is the most hollow layer side portion of the glass deformation follower. With spacer length Providing a spacer for insulating glass, characterized in that it is fixed to the hollow spacing member by successive adhesive layer on the direction.

The invention according to claim 2 is 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, and the spacer has an interval between the glass plates. A hollow interval holding member to hold and a moisture-proof layer having a function of preventing moisture from entering the hollow layer from the outside, and the moisture-proof layer is disposed so as to cover a portion facing the outside of the hollow interval holding member The spacing member and the double-layer glass secondary seal are configured so as not to be in direct contact with each other, and the moisture-proof layer is made of a flexible film-like member and is hollow from a portion facing the outside of the hollow spacing member. It has a glass deformation follower extended to a part where the spacing member and the glass plate are opposed to each other, and is intermittent in the spacer length direction with a width of 1 mm at both ends of the glass deformation follower which is the most hollow layer side portion. Suitable for adhesive processing Ri to provide a spacer for insulating glass, characterized in that fixed to the hollow spacing member.

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

The invention described in claim 4 is characterized in that the multilayer glass spacer according to any one of claims 1 to 3 is such that the moisture-proof layer is any one of the following films (1) to (4). And (1) Metal film. (2) An organic multilayer film having a metal film and an organic film in at least one layer. (3) An organic multilayer film having a metal vapor deposited film in at least one layer. (4) 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 fifth aspect of the present invention, in the multilayer glass spacer according to any one of the first to fourth aspects, the elastic modulus of the film-like member forming the moisture-proof layer is eMPa, and the secondary moment is Icm ^4. The length of the moisture-proof layer of the glass deformation follow-up portion extended from the portion facing the outside of the hollow space keeping member to the portion where the hollow space keeping member and the glass plate face each other is Lcm, and the glass deformation follow-up portion When the surface peeling force per unit area between the moisture-proof layer and the hollow spacing member is WMPa, 0.4 e · I / L ⁴ + W is 0.5 MPa or less.

The invention according to claim 6 is that when the spacer for multilayer glass according to any one of claims 1 to 5 is disposed in the multilayer glass, it is processed into a rectangular shape by bending. Features.

A seventh aspect of the invention is characterized in that the multilayer glass spacer of the sixth aspect of the invention is characterized in that the elongation at break of the film-like member forming the moisture-proof layer is 75% or more.

In the invention according to claim 8 , the spacer for a multilayer glass according to any one of claims 6 and 7 from the portion facing the outside of the hollow space holding member, the hollow space holding member and the glass plate The peeling force by the measuring method of 180 ° peeling adhesive strength between the moisture-proof layer and the hollow space holding member in the glass deformation follow-up portion that is stretched to the opposite portion is 2.0 N / cm or more. Features.

A ninth aspect of the present invention is characterized in that in the multilayer glass spacer according to any one of the sixth to eighth aspects, the thickness of the film-like member forming the moisture-proof layer is 150 μm or less.

The invention according to claim 1 0, and at least two glass plates, a spacer hollow layer is interposed on the periphery of the glass plate to be formed between the glass plate cross and the spacer A primary sealing material interposed between the glass plate, 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 portion 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, and the spacer Is configured so that the moisture-proof layer is disposed so as to cover the portion facing the outside of the hollow space holding member when the glass is incorporated into the double glass, and the hollow space holding member and the secondary seal of the double glass are not in direct contact with each other. And the above-mentioned prevention The wet layer is made of a flexible film-like member, and has a glass deformation follower 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 follow-up portion is fixed to the hollow holding member by continuous adhesion processing in the spacer length direction with a width of both end portions of 1 mm which is the most hollow layer side portion of the glass deformation follow-up portion. A multilayer glass, wherein a primary sealant is interposed between the glass plate and the glass plate, and the spacer according to any one of claims 1 and 3 to 9 is adhered. I will provide a.

The invention of claim 1 1, at least two glass plates, a spacer hollow layer is interposed on the periphery of the glass plate to be formed between the glass plate cross and the spacer A primary sealing material interposed between the glass plate, 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 portion 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, and the spacer Is configured so that the moisture-proof layer is disposed so as to cover the portion facing the outside of the hollow space holding member when the glass is incorporated into the double glass, and the hollow space holding member and the secondary seal of the double glass are not in direct contact with each other. And the above-mentioned prevention The wet layer is made of a flexible film-like member, and has a glass deformation follower 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 follow-up portion is fixed to the hollow holding member by intermittent adhesion processing in the spacer length direction with a width of 1 mm at both ends which are the most hollow layer side portions of the glass deformation follow-up portion. A multi-layer glass is provided, wherein the glass plate and the spacer according to any one of claims 2 to 9 are adhered with a primary sealant interposed between the glass plate and the glass plate. .

  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 In addition, although the material of the hollow space | interval holding | maintenance member 4 is a metal which usually uses aluminum as a main material, a stainless steel material and hard resin may be sufficient. In particular, a metal mainly made of aluminum is preferable from the viewpoints of water resistance, weight reduction, strength, and workability.

  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 portion 4b, and the hollow space holding member 4 and the secondary seal 7 are arranged so as not to contact the hollow space holding member 4 and the primary seal 6 directly in 4c. The moisture-proof layer 5 and the intermediate space holding member 4 are fixed to at least a part of 4c by adhesion processing, whereby the hollow space holding member 4 and the secondary seal 7 are fixed via the moisture-proof layer 5. In addition, when the glass deformation follow-up portion 5a stretched from the portion 4c facing the outside of the hollow interval holding member 4 of the moisture-proof layer 5 is assembled as a double-glazed glass, the entire portion 4b of the hollow interval holding member 4 or its It is fixed to the glass plate 2 through the primary seal 6 while being fixed by the adhesive processing at the portion closest to the air layer. 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.

  When the multi-layer glass 1 expands when exposed to a temperature higher than the temperature at which the hollow layer 8 is enclosed, the glass plate 2 tends to spread outward, and between the primary seal 6 and the glass plate 2 and between the primary seal 6 and the glass. Since the adhesive force between the portions 5a is larger than the sum of the cross-sectional secondary moment of the glass follower 5a and the adhesive force between the 4b portion of the hollow interval holding member and the glass follower 5a, the glass follower 5a maintains the hollow interval. It peels from 4b of a member, follows glass plate 2, primary seal 6 and glass follow-up part 5a which is a part of moisture-proof layer 5 do not peel, and primary seal 6 is not damaged. Moreover, since the moisture-proof layer 5 is fixed by adhesion processing when assembled as a double-glazed glass in all or at least a part of the hollow spacing member 4b and at least a part of 4c, in the double-glazed glass manufacturing process It becomes easy to handle and can be applied to automated lines.

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

Further, the elastic modulus of the film-like member which is the moisture-proof layer 5 is eMPa, the second moment of section is Icm ⁴ , and the hollow interval holding member 4 and the glass plate 2 face each other from the portion 4c facing the outside of the hollow interval holding member 4. When the length of the glass deformation follow-up portion 5a extended to the site is Lcm, and the surface peeling force per unit area between the moisture-proof layer 5 and the hollow interval holding member 4 in this glass deformation follow-up portion 5a is WMPa, 0.4e it is preferable · I ^{/ L} 4 + W is 0.5MPa or less. When 0.4e · I / L ⁴ + W exceeds 0.5 MPa, the glass follower 5a cannot follow the deformation of the glass in the temperature region where the hollow layer 8 expands, and the primary seal 6 may be broken. . In addition, although the thickness of the moisture-proof layer 5 changes with materials and adhesive force of the moisture-proof layer 5, it is preferable that it is 0.005 mm or more and 0.15 mm or less, for example in a soft aluminum film.

  In terms of applicability to the automation line of the multilayer glass manufacturing apparatus, particularly adaptability in the spacer automatic bending process, the elongation at break of the film-like member forming the moisture-proof layer 5 of the spacer 3 may be 100% or more. preferable. If the elongation at break of the film-like member is less than 100%, when the spacer 3 is bent into a rectangle, the outer peripheral portion of the bent portion of the spacer 3 cannot cope with the increase in dimensions and the moisture-proof layer 5 may break. It is. As for the elongation at break of the film, it is desirable that the stretching method is stretched by 75% or more by a simple pulling operation, but it may be stretched by 75% or more by heat pulling or a method of placing and stretching the film.

  Moreover, in the applicability to the automation line of multilayer glass manufacture, especially the adaptability in the spacer automatic bending process, the hollow interval holding member 4 and the glass plate 2 are formed from the portion 4c facing the outside of the hollow interval holding member 4. The peeling force by the measuring method of 180 ° peeling adhesive force described in JIS Z 0237 between the moisture-proof layer 5 and the hollow space holding member 4 in the glass deformation follow-up part 5a extended to the facing part 4b is 2 It is preferably 0.0 N / cm or more. When the peel strength measured by the 180 ° peel adhesive strength measurement method is less than 2.0 N / cm, the moisture-proof layer 5 is hollow in the transportation process of the spacer 3 and the spacer automatic bending process when the double-glazed glass production is automated. This is because there is a possibility that the moisture-proof layer 5 may not function sufficiently due to separation from the spacing member 4 or damage to the moisture-proof layer 5.

  Moreover, it is preferable that the thickness of the film-like member which forms the moisture-proof layer 5 is 150 micrometers or less from the adaptability in a spacer automatic bending process. When the spacer 3 is bent into a rectangular shape, film overlap or wrinkle may occur at the inner periphery of the bent portion of the spacer 3, and this phenomenon becomes significant when the film thickness exceeds 150 μm. There is a risk of delamination at the heel or overlap. When the moisture-proof layer 5 has a sufficient elongation at break so that the outer periphery of the bent portion of the spacer 3 does not break when the spacer 3 is bent, the film-like member for forming the moisture-proof layer 5 is used. The thickness is particularly preferably 50 μm or less.

  2A to 2D are explanatory views showing an example of a manufacturing method of the spacer 3 according to the present invention. First, FIGS. 2A to 2C are diagrams showing a method of adhesion processing of the moisture-proof layer 5 when the moisture-proof layer 5 made of a flexible film is viewed from above in the length direction. FIG. 2 (a) is an example in which the entire surface of the moisture-proof layer 5 has been subjected to adhesion processing, and (b) is a portion in contact with the portion 4c of the moisture-proof layer 5 that faces the outside of the hollow spacing member 4, The portion of the hollow spacing member 4 that is in contact with the portion 4b facing the glass plate 2 is continuously adhered to the end of the hollow layer 8 (both ends in the width direction of the moisture-proof layer 5) in the spacer length direction. (C) is the part which contacts the site | part 4c facing the outer side of the hollow space | interval holding member 4 of the moisture-proof layer 5, and the site | part 4b which opposes the glass plate 2 of the hollow space | interval holding member 4. This is an example in which an adhesive process is intermittently applied to the end of the hollow layer 8 at the contact portion (both ends in the width direction of the moisture-proof layer 5) in the spacer length direction. In FIG. 2, hatching is a portion subjected to adhesive processing.

  FIG. 2D shows, for example, a portion 4 c that faces the outside of the hollow spacing member 4 and a hollow when the adhesive processed portion shown in FIGS. It integrates so that the space | interval holding member 4 and the site | part 4b which the glass plate 2 opposes may contact. In this way, the spacer constituting the double-glazed glass, the hollow interval holding member 4 holding the interval between the glass plates 2, and the moisture-proof layer 5 having a function of preventing moisture from entering the hollow layer 8 from the outside, And the moisture-proof layer 5 is arranged so as to cover the portion 4c facing the outside of the hollow space holding member 4 so as not to directly contact the hollow space holding member 4 and the secondary seal 7 of the multilayer glass 1. Glass deformation follow-up in which the moisture-proof layer 5 extends from the portion 4c facing the outside of the hollow space holding member 4 to the portion 4b where the hollow space holding member 4 and the glass plate 2 face each other and is adhered to the hollow space holding member 4. The spacer 3 having the portion 5a can be obtained.

  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 a viewpoint of lower moisture permeability and an adhesive force. The longer the better, the thinner the thickness t6, which is equivalent to the distance between the spacer 3 and the glass plate 2, the better. In order to have substantial durability, it is particularly preferable that the ratio of t6 / L6 is 0.15 or less.

  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. 3 is a cross-sectional view of the hollow spacing member 4 according to the embodiment of the present invention, and FIG. 4 is an exploded explanatory view of the structure of the double-glazed glass according to the embodiment of the present invention. As shown in FIG. 3, in the cross section of the hollow interval holding member 4, the length of the portion facing the hollow layer of the hollow interval holding member 4 is set to A and parallel to the glass plate 2 when assembled as a double-glazed 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. 3 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 aluminum film (Al film), polyethylene terephthalate / aluminum film / polyethylene terephthalate. Organic multilayered film (aluminum composite film), thickness configuration 12 μm / 20 μm / 12 μm, polyethylene terephthalate / polyethylene terephthalate organic multilayered film (aluminum deposited film) deposited with polyethylene terephthalate / aluminum, thickness configuration 12 μm / 12 μm / 12 μm, Five types of ethylene trifluoride chloride film (PCTFE film) and polystyrene film (PS film) were used. As a method of applying the adhesive material to the moisture-proof layer 5, while continuously feeding out each film-like member that is the moisture-proof layer 5 wound up in a roll shape, in FIG. In (b), the width direction central part 11.5 mm width 11a and both end widths 1 mm 11b of the moisture-proof layer 5 are continuously formed. In (c), the width direction center part 11.5 mm width of the moisture-proof layer 5 is continuously measured. It was prepared by applying a solution of poisobutylene dissolved in hexane at a concentration of 1% by weight in hexane to discontinuous 11c with a width of 1 mm at both ends and a length of 10 mm at intervals of 10 mm on both ends. .

  After the aluminum spacer 3 having the moisture-proof layer 5 is bent into a rectangle having an inner dimension of 330 × 480 mm by a buyer's automatic folding machine, 1 g of granular 3A zeolite as a water vapor absorbent is placed in 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. Tables 1 to 3 show dimensions and materials of the medium space angle holding member 4 used in each example and comparative example, dimensions and materials used for the moisture-proof layer 5, and methods for applying 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. 5 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 a conventional spacer, and the line compatibility was evaluated. The evaluation criteria are 10 pieces of 10 sheets of 10 sheets in the case where 10 pieces of 5 m long spacers 3, size 350 × 500 mm, and 20 pieces of float glass with a thickness of 5 mm are prepared and 10 pieces of double-layer glass are prototyped continuously. No problem in manufacturing, ◎ 8-10 out of 10 no problem in manufacturing, ○ No problem in 4-7, △ Only 3 or less manufactured Those that could not be evaluated were evaluated as x.

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

From Table 1-5, the life in the configuration of the spacer 3 of Example 1-2, it can be seen that as compared with Comparative Example 1 is a conventional product has become 10 times or more. In addition, when a composite film with a resin film such as a resin film or a composite film with metal, a vapor-deposited film, etc. is used, the handling property is generally good, and the production line that manufactures the conventional spacer 3 is greatly modified. There is no need, and even if a metal film is used, it can be applied to a general-purpose double-glazed glass production line. However, as in Comparative Example 3, it is difficult to cope with the production line when the peel strength of the moisture-proof layer by the 180 ° peel-off adhesive strength measurement method is 2.0 or less.

  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 concerning the present invention. It is explanatory drawing which shows an example of the manufacturing method of the spacer which concerns on this invention. FIG. 3 is a cross-sectional view of a hollow spacing member according to an embodiment of the present invention. It is decomposition | disassembly explanatory drawing of the structure of the multilayer glass which concerns on the Example of this invention. FIG. 5 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.

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, 11a, 11b, 11c: Adhesion processed part.

Claims (12)

  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. A glass deformation follow-up portion that has been stretched to a portion to be held, and the hollow spacing is maintained by continuous adhesive processing in the spacer length direction with a width of both end portions of 1 mm that is the most hollow layer side portion of the glass deformation follow-up portion Part Spacers for insulating glass, characterized in that it is fixed.   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. The hollow space holding member has a glass deformation follow-up portion extended to a portion to be stretched, and has a width of 1 mm at both end portions which are the most hollow layer side portions of the glass deformation follow-up portion by intermittent adhesion processing in the spacer length direction. Spacers for insulating glass, characterized in that it is fixed.   The said space | interval holding member is a metal, The spacer for multilayer glass of any one of Claim 1 to 2 characterized by the above-mentioned. The spacer for multi-layer glass according to any one of claims 1 to 3, wherein the moisture-proof layer is any one of the following films (1) to ( 4 ).
(1) Metal film.
(2) An organic multilayer film having a metal film and an organic film in at least one layer.
(3) An organic multilayer film having a metal vapor deposited film in at least one layer.
(4) 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 elastic modulus of the film-like member forming the moisture-proof layer is eMPa, the second moment of section is Icm ⁴ , from the portion facing the outside of the hollow interval holding member to the portion where the hollow interval holding member and the glass plate face each other When the length of the stretched moisture-proof layer of the glass deformation follow-up part is Lcm and the surface peeling force per unit area between the moisture-proof layer and the hollow spacing member in the glass deformation follow-up part is WMPa, 0.4 e · I / L < ⁴ > + W is 0.5 Mpa or less, The spacer for multilayer glass of any one of Claim 1 to 4 characterized by the above-mentioned.   The spacer for multilayer glass according to any one of claims 1 to 5, wherein the spacer for multilayer glass is processed into a rectangular shape by bending when interposing the multilayer glass.   The multilayer glass spacer according to claim 6, wherein the film member forming the moisture-proof layer has a breaking elongation of 75% or more.   180 ° between the moisture-proof layer and the hollow space holding member in the glass deformation follow-up 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 any one of claims 6 and 7, wherein a peeling force by a measuring method of peeling adhesive strength is 2.0 N / cm or more.   The multilayer glass spacer according to any one of claims 6 to 8, wherein the film-like member forming the moisture-proof layer has a thickness of 150 µm or less.   At least two glass plates, a spacer interposed between the glass plates so that a hollow layer is formed between the glass plates, and a spacer 1 interposed between the spacers 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. A moisture-proof layer is disposed so as to cover a 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 is flexible. Sexuality 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. It is fixed to the hollow holding member by continuous adhesive processing in the spacer length direction with a width of 1 mm at both ends, which is the portion closest to the hollow layer side, and further between the glass deformation follower and the glass plate. A multilayer glass, wherein the glass plate and the spacer according to any one of claims 1 to 3 are adhered to each other with a primary sealing material interposed therebetween.   At least two glass plates, a spacer interposed between the glass plates so that a hollow layer is formed between the glass plates, and a spacer 1 interposed between the spacers 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. A moisture-proof layer is disposed so as to cover a 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 is flexible. Sexuality 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. It is fixed to the hollow holding member by intermittent adhesive processing with a width of 1 mm at both end portions which are the most hollow layer side, and further a primary sealant is interposed between the glass deformation following portion and the glass plate And the glass plate and the spacer according to any one of claims 2 to 9 are adhered to each other.   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. Double layer glass.

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