KR810000670B1 - Sealing and isolating device for multiple windows - Google Patents

Abstract

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Description

Sealing and isolating device for multiple windows

1 shows a perspective view of a strip on the coil of the sealing and isolating unit of the present invention.

2 is a cross-sectional view of the sealing and isolating unit of the present invention.

3 is an enlarged cross-sectional view of a multi-staining window using the sealing and spacing unit of the present invention.

4 shows another embodiment of the sealing and spacer unit of the present invention.

The present invention relates to multiple glazed window units and sealing and isolating devices for such units. In another aspect, the present invention is directed to the use of a special cold flow mastic sealant composition in combination with an elongated flexible dehydrator strip firmly adhered to a thin film strip member.

US Pat. Nos. 3,573,900 and 3699785 to Bauzer et al. Disclose a sealing and isolating device for multiple indent windows. The sealing and isolating device consists of a flexible carrier strip such as an aluminum thin film and is bonded to one side of the carrier strip by means of an elongated ribbon of milboa material and an elongated elasticity dehydrator element described above. It is fixed to the carrier strip mentioned above via the agent. The carrier strip is slightly wider than the sealant and the sealant is wider than the isolator-dehydrator element. These Segido cows extend equally in length and are arranged symmetrically on either side of the longitudinal centerline of the composite element. Examples of suitable sealant compositions are disclosed, for example, in U.S. Patent No. 2974377 to Kunckle as butyl rubber-based sealants.

Bouzer's U.S. Pat. Nos. 3,757,897 and 3791910, likewise, disclose similar sealing and isolating devices for multiple-mouth windows, and the sealant compositions disclose that hot melt adhesives are also possible. Further, Patent No. 3791910 discloses that the sealant composition may be a butyl rubber-based sealant composition of room temperature fluidity.

The sealing and isolating device described above presents some obvious advantages in the production of multiple indentation windows, but with any middle class defects specific to such sealing and isolating devices.

As described in the above-mentioned 3657900 and 3699785 patents, butyl sealants impart airtight, durable seals but are not particularly good adhesives. When packaging and transporting the composite element as a coil so that there is an insulator-dehydrator element closest to the coil core, the insulator-dehydrator element moves relative to the sealant and the insulator-dehydrator element has a wavy appearance. The butyl sealant does not have sufficient adhesive properties to view the isolator-dehydrator element on a carryless tape in a straight line.

It is unusually difficult to straighten a wave-shaped separator-dehydrator once the sealing and spacing unit is taken out of the package and released. If a conventional sealing and isolating unit is applied between the spaced glass plates and curved around the 90 degree corners of the glass plate ends, the mastic composition will not be able to properly adhere the insulator-dehydrator to the carrier tape and the insulator- The dehydrator is lumped to stress the corners of the multi-sensing window or often extends the lumped isolator-dehydrator to the visual field. To avoid this problem, the notch of the isolator-dehydrator must be removed from the corner area of the composite element.

The problem mentioned above is that the sealant composition has strong adhesion and adhesion, so that the isolator-dehydrator element is firmly secured to the carrier strip so that the conforming strip is coiled for packaging or in the 90 degree corner of the multi-sensing window. It is possible to overcome by avoiding the fracture of the isolator-dehydrator when bending around. In the aforementioned US Pat. Nos. 3,757,96 and 3791910, hot melt adhesives have extremely strong adhesion and adhesion, and are attractive sealants for securing the insulator-dehydrator element to the carrier strip. Unfortunately, hot melt adhesives have a number of drawbacks inherent in their use in multi-window units. Above all, hot melt adhesives are not as good sealants as butyl rubber materials. Hot melt adhesives are stronger than butyl rubber sealants and are not as durable as butyl rubber sealants and are permeable to water vapor thereon. In addition, the hot melt adhesive has no room temperature fluidity and has fluidity only when heated.

With a hot melt adhesive, the hot melt adhesive must flow to heat the composite seal and spacer or glass in sealing contact with the end of the glass plate. There is obviously a mechanical disadvantage in heating the composite element or glass and heating thereon deforms the flexible isolator-dehydrator element and also creates undesirable shrinkage inside the multi-sensing unit when cooling the heated element. On the other hand, when using the butyl sealant, only the compression at room temperature causes the sealant to flow sufficiently to make the sealing contact with the end of the glass plate in a welded state. In addition, if the room temperature butyl sealant of U.S. Patent No. 3791910 is used, an unusually low pressure, for example, a hand roller, is sufficient.

From the above consideration of the prior art, it is clear that an improved one is required as the sealing and isolating unit for the multi-sensing window.

It is an object of the present invention to provide such an improved sealing and isolation unit. More specifically, the object of the present invention is applicable to the peripheral end of a plurality of glass plates which are composed and isolated and composed of a thin and long soluble water impermeable base or ribbon, sealant and isolator-dehydrator element, Another object of the present invention is to provide a sealing and isolating unit that seals in a welded state by flowing a sealant only by pressing the end portion of the glass plate and sealingly contacting the end of the glass plate in a welded state. On top of this, the unit is deformed or raised when the isolator-dehydrator element is held firmly bonded and adhered directly to the base described above, or the unit is packaged with a coil or curved around the 90 degree corner of the multi-window unit. It does not have an outer appearance.

Another object of the present invention is to provide a multi-sensing window using a sealing and isolation unit as described above.

Still another object of the present invention is to produce a superior sealing and isolation unit using a novel room temperature mastic sealant in combination with a carrier strip and an isolator-dehydrator.

According to the present invention,

(a) suitable for insertion between the elongated moisture impermeable base and the opposite edge end of a pair of rigid and parallel glass plates of (i) a multi-sensing unit substantially longitudinally matched on the base; An elongated preformed dehydrator strip having a molded cross section; And (ii) each strip of a room temperature flow resistant moisture resistant mastic sealant composition disposed on both sides of said isolator-dehydrator element and preferably slightly isolated from the isolator-dehydrator element. The strip is made of a water-permeable elastomeric mastic having finely divided particles of desiccant material dispersed throughout and the dehydrator strip is sealed for the multi-sensation window consisting from being fixed to the base via a thin layer of adhesive. And an isolation unit is provided.

The present invention also provides a multi-sensing window using the sealing and isolation unit described above.

The present invention provides a novel room temperature-flowable mastic sealant composition in combination with a flexible, water-impermeable base and an isolator-dehydrator secured via a thin layer of adhesive to the base.

This sealant composition consists of the following components.

Next, the present invention will be described with reference to the drawings. The sealing and isolating unit 6 of the present invention is obtained by attaching an elongated preformed elastic dehydrator strip 4 to one side via a thin layer 3 of adhesive. It is constructed from an elongated moisture impermeable flexible base or ribbon 1. Two strips 2 of room temperature fluidic mastic sealant composition are located on both sides of the ribbon 1 at intervals on both sides of the dehydrator strip 4 and like the dehydrator strip 4. In a preferred embodiment of the present invention, the angular strip of room temperature flowable mastic sealant is positioned slightly isolated from the dehydrator strip. (But can be coplanar with the dehydrator strip).

In addition, each mastic seal strip 2 is approximately equal in width, as shown in FIGS. 1 and 3, since the two glass plates of the multi-window will necessarily have the same width. However, if one glass plate is thicker than the other one, an uneven sealing and isolation unit may be used as shown in FIG.

In the configuration of the multi-sensing window, as shown in FIG. 3, an insulating space is provided between the glass tubes located at the outer periphery of the pair of glass plates 5, which are generally parallel and insulated from each other. To give.

Each glass plate is isolated at its edge end by a continuous isolator-dehydrator element 4.

The welded sealing of the space of the single phase is achieved by the moisture resistant mastic 2 adhering the ribbon 1 to the peripheral end of the glass plate completely at the outer periphery of the window. The hand roller may be conveniently used in sealing contact with the peripheral end and / or edge end of the glass plate by pressing the mastic 2 and the flow of the mastic generated is slightly wider than that of the mastic strip 2. Is concealed by the width of the. In addition to the hand roller, an automated mechanism, such as that disclosed in Wolf et al. US Pat. No. 3,733,237, may be used to seal the multi-sensing window onto the weld.

In use in the present invention, the carrier ribbon 1 is composed of any moisture-impermeable flexible material. One example is an aluminum foil of 5 to 12 mils thick. There are also flexible, water-impermeable plastics such as polyethylene or polypropylene. Preferred is a 5 to 12 mil thick aluminum foil treated with a thin coating, for example 0.5 to 5 mils polyethylene, on its inner surface (i.e., the drawing where a dehydrator strip is placed). The inner coating of this polyethylene provides good adhesion of the isolator-dehydrator element to the ribbon 1.

The dehydrator strip 4 is a long elongated preformed strip of elastic polymeric material and has a cross section shaped for insertion between the inward edge ends of a pair of rigid and parallel glass plates of a multiplier window. The dehydrator strip is formed from a water vapor permeable elastomeric mastic, which contains finely divided particles of the drying material material dispersed therein. Such isolator-dehydrator elements are described in detail in US Pat. No. 3,397,596.

The insulator-dehydrator element 4 is secured to the flexible carrier strip 1 by means of a thin layer 3, ie about 1-10 mils of adhesive. Preferred is a hot melt adhesive. By hot melt adhesive is meant a binder which has a solidification and strength by cooling as compared to the adhesive which becomes solid by evaporation or removal of the solvent. Prior to heating, the hot melt adhesive is 100% solids of thermoplastic, all adhesive. This material becomes liquid when heat is applied and solidifies only by cooling after removal of heat.

The main reasons for using hot melt adhesives in the practice of the present invention are the economic reasons associated with processing speed, simplicity and mechanization. Hot melt adhesives are also used for the rate at which adhesion occurs. Economics in the practice of the present invention indicates that the coupling between the flexible carrier tape and the separator-dehydrator element can be achieved quickly in view of the need for packaging. In addition, the use of a hot melt adhesive can eliminate the solvent cost used in the solvent-based adhesive. In the implementation of the present invention thereon, a solvent-based adhesive cannot be used. The reason is that the coupling mechanism of the solvent-based adhesive depends on the evaporation of the solvent. Evaporation of the solvent near the dehydrator strip can cause problems due to the desiccant contained in the dehydrator. The desiccant adsorbs the solvent vapor, thereby causing the possibility of dissipating the solvent vapor on the inner surface of the multisensing unit and fouling the appearance of the unit.

Examples of suitable hot melt adhesives include coumarone-indene resins, rosin and derivatives thereof, minerals, plant and petroleum waxes, alkets, terpene resins, thermostable phenol-formaldehyde resins and the like.

All such hotmelt adhesives typically have a low strength and easily melt into a branched fluid. In order to be converted into usable adhesives, these materials can be used in the following high molecular weight polymers: ethyl cellulose, polyvinylacetate and its derivatives, butyl methacrylate, polyethylene, polystyrene, styrene copolymers such as styrene-butadiene copolymers and polyisobutylene. Reinforcement or reinforcement is achieved by mixing a certain amount of the selected polymer.

The final adhesive usually additionally contains a proportion of liquid plasticizer, dendritic material or monomeric material. Natural asphalt and plant and coultar pitch are also base materials useful alone or in combination as hot melt adhesives.

Most preferred hotmelt adhesives are those made from polyethylene, polyvinyl acetate and derivatives thereof and polyamides derived from dimerized fatty acids and diamines. Particularly preferred hot melt adhesives are acrylic ethylene copolymers sold by Union Carbide under the trade name EAA 9300, ethylene vinyl acetate copolymers sold by ELIDX as ELVAX, and ESM sold under THERMOGRIP. Hot melt adhesives (see, eg, US Pat. No. 3283890 to Morris et al.).

Hot melt adhesives can be obtained in various shapes. For example, it can obtain in various shapes, such as a tape, a cord, a ribbon, a film, or a sheet, a granular material, a pellet, and a cylindrical material, a cube, or a block-like material.

The hot melt adhesive used in the practice of the present invention is a non-mastic material at room temperature and can be easily stored and manipulated without causing blocking. The color of such adhesives is usually bright and melts and flows freely when heated. Moreover, the hot melt adhesive of the present invention is stable to long-term heating and can withstand local overheating. The hotmelt adhesives of the present invention should be flexible over a fairly wide temperature range in which multiple sensitizers are expected to meet or use. Thus, the hot melt adhesive of the present invention should have flexibility over a temperature range of about -34 to 77 ° C (-30 ° F to 170 ° F). The term flexible means that the hot melt adhesive can withstand crack-free normal movement (shifting to other components added to the difference in the coefficient of thermal expansion of each component of the multi-sensing unit) over the temperature range of -34 to 77 ° C of the multi-sensing unit. It means to be. Moreover, the hot melt adhesive must firmly adhere the elastic polymer isolator-dehydrator element to the elongated base.

In the melt phase, hot melt adhesives are applied by nozzle wheel or spray to a preheated strip of carry tape in the form of beads or ribbons. The application temperature usually depends on the hot melt adhesive used. This solidification temperature should be such that sufficient time is available to end the bonding between the carrier tape and the separator-dehydrator element at a slight pressure, and the bonding achieved by the helmmelt adhesive is strong. Therefore, after cooling and solidifying the adhesive, the 180 ° peeling test between the isolator-dehydrating element and the carrier strip should be at least 25 pounds / inch, as measured by ASTM D-903-49T. Usually, according to the polymer matrix material described in US Patent No. 3758996 described above, the adhesive bond strength is stronger than the polymer matrix fixation strength. In other words, 180 ° peel strength between 25 and 40 pounds / inch, which results in seizure defects in the isolator-dehydrator, is usually obtained.

In general, the apparatus for applying hot melt has two molds, a melt reservoir type and a moving supply type. In the former, some amount of adhesive is melted in the pot and fed from the pot to the heating nozzle with a metering pump. Hot melt adhesives for this method are block, chip or granular. The contents are heated to a predetermined temperature while being controlled by a thermostat in a melting pot, and the melt is supplied to a nozzle or a bonding wheel by a pump.

In mobile tool applicators, the adhesive is applied as a flexible, grooved pile cylindrical cord wound on a wheel. The feed rate of the cord is equal to the feed rate of the melt from the application nozzle. Between the feed end and the nozzle, the adhesive passes around a heated melting wheel that moves through the concentric grooves. The melt chamber is shaped by a small tubular space between the wheel and the caustic. Since the internal capacity of this device is small, several grams of material are held above the melt temperature in the applicator.

The use of a thermostatically controlled heating element located at a carefully selected location allows the adhesive to be maintained at the optimum operating temperature without overheating. The width of the bond can be controlled by the world of nozzles or application wheels based on the relationship between the feed rate of the adhesive and the aluminum foil ear canal velocity.

Other adhesives may be used that do not require evaporation or removal of the solvent in addition to the hot melt adhesive to impart an adhesive bond. Examples of other adhesives that can be used include polymerizing or crosslinking the polymer chain to purify and exert an adhesive bond. Examples of such adhesives are phenol and resorcinol numerical adhesives and cyanoacrylate resin adhesives.

Such adhesives are non-mastic materials, such as hot melt adhesives, which are solid at room temperature and do not have room temperature fluidity. It is to be understood that the term adhesive used herein is intended to be a material different from the sealing composition of mastic room temperature fluidity.

Referring again to the drawings, the sealant composition 2 is an air and moisture impermeable mastic room temperature fluid composition. The term moisture impermeability means that the sealant is less than or equal to 37.8 ° C. (10 ° F.) 90% relative humidity 8 gr / 24 hours / square m / mil as measured by ASTME-96-66, Method E, preferably 5 gr / 24 hours / It means having a water vapor permeability of square m / and below. Examples of suitable room temperature flowable mastic sealant compositions are disclosed in US Patent Application No. 3791910 and US Patent Application No. 371913 (filed June 20, 1973) entitled Sealant. Such sealant compositions are room temperature vulcanizable and butyl rubber seals. As described, the sealant compositions described above are vulcanizable. That is, the sealant is not cured or vulcanized when initially prepared, but is cured by long-term exposure at room temperature or short-term exposure at high temperature. Unfortunately, the fastest method of making the sealing and isolating unit of the present invention is to vulcanize the butyl sealant before applying the sealing and isolating unit to the glass ends of the multisensing window. As described later, the vulcanizable butyl sealant is the one applied to the carrier tape at about the same time as the hot melt adhesive. The hot melt adhesive is applied at a temperature of about 232 to 246 ° C. (450 to 475 ° F.) and this heating in close proximity of the vulcanizable butyl sealant rapidly vulcanizes the sealant. Once vulcanized, the butyl sealant does not readily flow at room temperature and requires clamping, hard isolators, and other high pressure devices to flow through the glass end of the multi-sensing unit transversely to form a weld seal. .

Thus, the sealing and isolation unit of the present invention would be desirable for a non-flowable, room-temperature, moisture resistant mastic sealant composition.

Sealant compositions that have been found to be preferred have the following compositions.

The sealant composition has no curing agent and is non-vulcanizable. It can be used in the carrier tape without the risk of premature curing or vulcanization at the same time or prior to the hot melt adhesive. In fact, when the sealing and isolation unit is manufactured and applied to the glass end of the multi-window unit, the heat from the hot melt adhesive readily flows the preferred sealant composition, giving good sealing properties.

As shown in each figure, the sealing and isolation unit 6 can be assembled as follows. Carrier tape 1, such as aluminum foil, places a roll at the start of the assembly line, releases the roll and passes it under a 3.5 inch NMR rubber extruder with a split die, 2) is extruded to the end of the carrier tape (1).

Immediately or simultaneously thereafter, the carrier tape containing the sealant preheats the tape to a high temperature, ie, about 121-204 ° C. (250-400 ° F.) through a radiant heater. Immediately thereafter, the hot melt adhesive 3 is applied between the two-minute ribs of the mastic sealing composition of the carrier tape 1. The separator-dehydrator element 4 wound on the roll on the foil strip in motion is then immediately applied to the bead-like hotmelt adhesive with the aid of a roll to form a thin film of hotmelt between the carrier tape and the separator-dehydrator 4. If necessary, rollers may be added to the assembly line to press the separator-dehydrator and carrier strip together to wet the hot melt adhesive better. The hot melt hardens and solidifies when a fixation bond is formed in the carrier tape and the separator-dehydration period. The sealing and spacing unit is then packaged as a coil or directly applied to the glass end of the multi-sensing cabinet unit as described above.

Claims (1)

Elongated flexible moisture impermeable base; An elongated preformed elastic insulator-dehydrator element having a preformed cross section inserted between the opposite edge ends of a pair of rigid parallel sheets of multiple inlet windows (this insulator-dehydrator strip is throughout Consisting of a water vapor permeable polymer matrix having finely divided particles of the desiccant dispersed therein), a thin layer of non-mastic adhesive that is not room temperature fluid at room temperature as a solid for fixing the separator-dehydrator in a substantially continuous longitudinal direction to the base. ; And a strip of room temperature flowable mastic vapor impermeable sealant composition disposed on the base.

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