DE2555383A1 - INSULATING WASHER WITH AN INTERLAY OF LARGE THICKNESS, METHOD OF APPLYING THE INTERMEDIATE LAYER AND DEVICE FOR CARRYING OUT THE PROCESS - Google Patents

Description

Saint-Gobain Industries 62, Bd. Victor Hugo F-92209 Neuilly-sur-Seine

Insulating washer with an intermediate layer of great thickness, method for applying the intermediate layer and device for implementation of the procedure

The invention relates to an insulating washer with two or more translucent or transparent, for example made of glass, separated from each other by an intermediate layer made of plastic material are, which is arranged on the circumference and the air contained between the plates forming the insulating washer isolated from the outside atmosphere.

If, for the sake of simplicity, only insulating panes made of glass are mentioned in the following description, then so Of course, this does not constitute a restriction of the invention in any way.

It is known that the intermediate layers represent connecting elements with a double function: on the one hand, ensure they the tightness of the one located between the glass plates

Air spaces and prevent the ingress of vapors or Dust from the atmosphere, on the other hand, they hold the glass plates firmly against each other in their position and the desired distance.

If the intermediate connecting parts are made of a plastic material, in practice they have an inner strand made of a first plastic material made of a type of polyisobutylene and an outer putty made of a second plastic material made of a type of silicone elastomer or a polysulfide. The putty is injected between the strand and the edges of the glass plates and, due to its excellent adhesive properties, holds the glass plates in the correct position and also helps to ensure tightness. The inner strand in turn acts as a spacer and allows the glass plates to be separated in order to maintain the desired air space between them. In order to ensure the absorption of moisture in the air layer separating the two glass plates, a drying or dewatering substance such as silica gel, zeolite or a substance from the group of molecular sieves is introduced into the inner strand.

The intermediate layers of the insulating glass panes can consist of a strand of a heat-melting and self-adhesive Material ^ a so-called hot melt are produced, it being possible with such intermediate layers, relatively to achieve large distances between the glass plates. However, it has not previously been possible to find a method of manufacture to fully automate such intermediate layers.

In contrast, strands produced by extrusion are particularly suitable for automatic production. Production lines and automatic machines for applying the inner strand

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and the outer putty layer are already in the DT patent applications 23 39 769.5, 23 59 329.5, 23 63 300.3, 25 44 301.0, 25 A4 302.1 and 25 44 138.7.

When automatically applying a thick strand, for example with one in DT patent application 23 59 329.5 described device, it is necessary that the plastic very specific properties in particular with regard to exhibits its viscosity so that it can extrude and ensures good adhesive properties on the glass.

A plastic strand was used for air layer thicknesses in of the order of 5 mm to 6 mm gives good results, but strands of the known type can deform and because of this, the functions of spacing and No longer ensuring tightness in a satisfactory manner. For the sake of simplicity and analogous to the thickness of the Air layer between the panels increases with the thickness of the Intermediate layer denotes the distance measured perpendicular to the surfaces of the glass plates.

The applicant has found that there are these disadvantages Eliminate and in particular can produce insulating glass panes with intermediate layers of great thickness, if one is used to manufacture of the intermediate layers, a material is used that, after a test time of 8 minutes at 40 ° C, a has a viscosity of greater than 115 Mooney degrees as measured by a Mooney consistency meter.

The organic material forming the strand can advantageously from a mixture of polyisobutylene and butyl rubber, i.e. a copolymer isobutylene isoprene,

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exist, with the weight ratio of polyisobutylene too Butyl rubber is between 4 and 8.

Taking into account the physical properties of the Strand, i.e. the viscosity and the adhesion to the glass plate, it is also important to have the strand under a to apply exactly specified angle with respect to the plane of the insulating glass pane.

The invention relates to a method for applying an intermediate strand to the periphery of a transparent or see-through glass plate for the production of an insulating sheet and is characterized in that a mixed substance is extruded onto the glass sheet, which after 0 minutes and at a temperature of 40 ⁰ C in a Mooney consistency meter has a viscosity of more than 115 Mooney degrees, and that the material is applied with an extruder nozzle which, in the direction of the extrusion head, forms an angle between 15 and 45 °, preferably between 25 and 35 °, with the glass pane ° includes.

The invention also relates to insulating washers with the above-mentioned method are produced, in particular insulating washers with an intermediate strand of great thickness.

The invention also relates to a device for carrying out the method according to the invention and is characterized in that that it comprises an extruder, the head of which is rotatably mounted on the body, and that the position of the body in its Height opposite tier level of the glass plate for the extrusion applied strand is adjustable.

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According to a further developing feature of the device according to the invention, the head and the body of the extrusion press
, each have a ü and mi L conical flange and are with
a Fanguch «Π e veH> .iiidfcn, the inner profile of which is complementary to that of the conical flanks of the collars,
on which the clamp rests.

Developing features and advantages of the invention are intended to
will be explained in more detail with reference to the following description of exemplary embodiments and with reference to the drawings. the
Drawings i-own in

1 shows a section through a double glazing 1 insulating glass pane with an intermediate layer great thickness;

Fig. 2 is a graph showing the change in the Mooney Visküsität of the interlayer material at a temperature of 4O ⁰ C, depending
from the time;

3 is a graph showing the change in the Mooney viscosity of the interlayer material as a function of the temperature after H minutes have elapsed;

Fig. 4 is a side view partially in section of the

Extrusion head and extrusion die, which is used to apply the intermediate layer;

FIG. 5 shows an axial section of the extruder head and the extruder body according to FIG. 4;

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Fig. 6 shows a cross section along the line VI-VI of Fig. 5; and in

Fig. 7 is a side view of the device for adjusting the height of the extrusion press assembly.

The double pane of glass shown in FIG. 1 has two panes of glass 1 and 2, between which an interposed strand 3 is arranged and which are separated by an air space 4 are separated. The panes of glass 1 and 2 are held in place by an outer layer 5 of polysulphide.

Double glazing with particularly good thermal insulation must have an air layer 4 of great thickness and the strand 3 must consequently have a thickness £ which is substantially greater than its height h.

In the automatic manufacturing process, as shown in the is described above documents, the strand 3 is from an injection device directly on Exit of the injection nozzle onto one of the glass plates, e.g. applied to the glass plate 1. The second glass plate 2 is then brought into position on the strand 3 and subjecting the assembly to pressure to press the glass sheets 1 and 2 tightly and continuously against the string 3 and create a tight connection. The outer layer

5 is then in situ between the two panes of glass 1 and in the space between the strand 3 and the edges

6 and 7 of the glass panes as well as applied to the edges themselves. It is understood that the strand material has precisely specified properties with regard to adhesion to the Glass and the viscosity must have for an automatic

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- 7 application of the strand 3 on the glass pane 1 is possible.

In fact, it is impossible for a strand poorly adhering to the glass to be automatically applied because it on the surface of the glass to the extent that it slips and slides as the glass plate advances under the injector. Furthermore, if the strand does not have the required viscosity properties it will deform, sink or bend due to its thickness if the second Glass pane is brought into position on the strand; it is then impossible to achieve a tight seal by exercising pressure on the axis to achieve.

The applicant has found that the automatic application of a strand with a thickness of more than 4 mm, which can even have a thickness of 19 mm and more, is possible with mixed substances after 0 minutes have a viscosity of more than 115 Mooney degrees at a temperature of 40 C, the test procedure was carried out in accordance with the French standard NPT 43005 with the aid of a Mooney consistency measuring device. Such mixed substances consist, for example, of a mixture of polyisobutylene and butyl rubber, the weight ratio of polyisobutylene to butyl rubber being between 4 and 8 lies. The concentrations of the constituents of the Mixed substances are, for example, between the following values expressed in% by weight:

- Polyisobutylene: between 40 and 70 Ge /.-%

- Butyl rubber: between 5 and 17.5 % by weight

- Carbon black: between 10 and 40 % by weight

- Zeolites between 0 and 20% by weight

Molecular sieve: between 0 and 5% by weight.

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That as a medium of troubles; The mo I eku I at si eb used preferably consists of a mixture of molecular sieves, the dimensions of which their adsorption pores are of the order of 4 Angstroms and 10 Ai '.- ··.' ■ ^f j ■ · "■: ■.! I ί '.ι.-η and the weight ratios of the following'.Vt-rl'ü arim-haien:

Sieve with. 4 Angstrom: O his / ι wt .- '/ ό of the entire string sieve with 10 Angstrom: O his 1 wt Jo ¹ of the entire string.

For example, it is not possible to use one strand of the following Composition:

Polyisobutylene 50% by weight} 0

- Butyl rubber 10 Vu by weight

- Carbon black 17, ^ by weight - ¹ X,

- Zeolites ;; 0 wt .-? P

- Molecular sieve 2.5 wt. ^L ; o

to obtain the viscosity curves shown in FIGS. 2 and 6 as a function of the twin per;., door and time when the strand is subjected to shear tests according to the above-mentioned French standard NFT 43005 using a Mooney consistency meter.

It is found that at a temperature of 40 ° C. after 8 minutes have elapsed, the viscosity of this composition still has a value of more than 115 Mooney degrees.

Such a strand can automatically be placed on a glass plate applied at a speed of at least 30 cm / s v / earth, since it has sufficient adhesion to the glass and no deformation whatsoever at strand thicknesses of 19 ram and more · L'. Tends.

The application of the strand with the canoe he effected C indungsgemäßen method, wherein the strand on one of the glass panes

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COPY Β * ¹³ ORIGINAL

is applied in such a way that its axis with the Aufbi-inglinie an angle x. between I ^ and Wj, preferably between 25 ° and 35 °.

In Fig. 4 is a side view partially in section of the 8trangpressenkopfes and the Kxtrusionsduse shown which can be seen in their position in relation to the glass plate leaves on which the intermediate strand is extruded. The head

11 of the extruder has a lateral extruder nozzle

12, whose coinciding with the axis of the system 1 "^ axis ZZ ¹ encloses an angle between 1 ^{1? 0} and A ') ° with the plane of the glass pane 14th On the same side of the extruder head is a transformer 15 with a ¹ hydraulic 1b, which actuates a knife 17 to cut the strand when the strand has been applied to all four edges of the glass pane 14. The glass pane 14 for its part rests on a conveyor (not shown) on which it advances under the S rang press nozzle 12 in the direction of the arrow f_ .

It goes without saying that a pivoting device is not shown provided, one after the other, the four edges of the glass pane brings under the nozzle.

The angle <j <~ can vary between 1'j and 45 ° in order to ensure the correct application and adhesion of the strand to the glass plate depending on the numerous parameters, such as the temperature, the surface condition of the glass plate, the advancing speed, etc. .

The setting is successful with the device according to the invention, which enables the extrusion head 11 to rotate about its longitudinal axis.

- 10 -

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As can be seen from FIG. 5, the extrusion press head 11 and the body of the extruder 18 each have a collar or splash with conical flanks 19 and 20 respectively. Inside the Head 11 and the body 18 an extruder screw 21 is arranged, which the plastic material for the strand compressed and supplied to an extrusion channel 22, at the outlet of which an extrusion nozzle shown in FIG 12 is attached. The extruder head 11 and the extruder body 18 stand by engagement of a clamp 23 with each other in lierührmg.

V / ie from Fig. B, a section along the plane VI-VI of the arrangement according to fig. ^l >, recognizes, the clamp 23 consists of two half- clamps 2k and 25 with an axis 26 and 27, respectively, which are connected to a web 28. With a screw 29, the two shark clamps can be tightened against each other. As seen from Fig. ¹ J, each clamp half a double-conical inner cross-section corresponding to the edges of the round or flanges 19 and 20, respectively.

It is easy to agree that when you loosen the locking of the screw 29 you can adjust the position of the extruder head 11 and even that of the angle L , while when you tighten the screw 29 you can fix the head in its position and at the same time the tightness between the extruder head 11 and the extruder body 18 ensured.

However vorändert umn when Ki us divide the angle * · the distance between the glass plate 14 and the end of Strangpressendüsfc \. 2

It proves that they can be used in optimal working conditions to be useful if iuäti this distance as well

- 11 -

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«ÖPY

- ΛΑ -

can adjust and fix to achieve the desired value. This is with the device shown in FIG possible.

As can be seen from FIG. 7, the extrusion press assembly 30 is protrude from a platform 31, which is connected to a carrier 33 is pivotable about an axis 32. The axis 32 is mounted in the fixed frame 32 '. A motor 34 drives the extruder on, which has, inter alia, the extruder body 18 and the extruder head 11, the extrusion nozzle at its end 12 wears.

A transport device 3 ^ι > lets the respective glass plate advance under the extrusion die and enables the glass plate to be rotated by 90 each time the strand is applied along an edge. Such devices 35 for transporting glass panes are known in the art, so that the device 3'5 will not be described in more detail.

In the left half of FIG. 7 it is on the frame 36 of the transport device 35 a threaded rod 37 with a height adjustable Stop 3 ^ shown, which can be locked in position with two nuts 39 and AO.

On the stop 3 <i comes a connected to the extruder 30 Stop 41 zur Abstützung.da the platform 31 has the tendency to rotate under the action of the compression spring 42 in the direction of the file £. You can see that it to adjust the distance between the extrusion die 12 and the glass plate 14 resting on the transport device 35 is sufficient to tighten the nuts 39 and AO or to solve to the stop 38 higher or lower place.

Claims: - 12 -

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copy

Claims (1)

-AZ- Claims _1y method for applying an intermediate strand on the circumference of a transparent or translucent pane for the production of an insulating washer, characterized in that a mixed substance is applied to the casing, which after a test time of 8 minutes at a temperature of AO ⁰ C a with a Mooney Consistency measuring device has measured viscosity of more than 115 Mooney ürad, and that the material is applied with an extrusion nozzle, the axis of which in the direction of the extrusion head forms an angle between 13 and 45 °, preferably between 25 ° and 35 °. 2. The method according to claim 1, characterized in that a mixture of polyisobutylene is used as the mixed substance and butyl rubber is used. 3. A method according to claim 2, characterized in that the weight ratio of polyisobutylene and butyl rubber is between 4 and 8, preferably in the vicinity of 6. 4. Apparatus for performing the method according to claim 1, characterized in that it paves an extruder has, the head of which is rotatably arranged on the body, and that the position of the body in its height opposite the level of the glass plate for the applied strand is adjustable. 5. Apparatus according to claim 4, characterized in that the head and the body of the extruder each have a flange with conical flanks, - 13 - 609826/0886 WOO COPY which with a "bell"; are connected with each other, whose Inner profile complementary to that of the conical flanks is the flange on which the clamp is supported. 6. Isoliersflü-i 1 "with at least two transparent or translucent disks, which are separated from one another on their circumference with an intermediate strand, characterized in that the strand is a substance that after 8 minutes at a temperature AO C has a viscosity of more than 11 ^C ; Has Mooney degrees. 7. Isol i eriiclit-i 1 · «imch claim 6, characterized in that g e k e η η draw t that the substance is a mixture of polyisobutylene and butyl rubber. 8. Isolierscheibe- according to claim 7, characterized in that g e k e η η , duO the profit / loss ratio of polyisobutylene and butyl rubber between Ί and 8, preferably in the vicinity of 6 lies. ¹ ^ - insulating washer nn: h one or more of the claims G to 8, thereby g e 1. e η u. ··. (■ - i c h η e t that the strand the following weighty adduiii ... - polyisobutylene between ;;. !, en AO and 70% by weight - üutylkautscüuV ·. between lien '-> and 17.5 Gaw .-% - Puss:. '. V / isv.heri 10 and 40% by weight - Zeolites j: wisc-ben 0 and 20 wt .-% Molecular sieve: v / isc: hen 0 and 5% by weight. 10. Isolation plate \ -. I. According to claim 9, thereby geke η η - ζ e i c h η tr L that .i ^ r Sti-arii, - .He the following weight composition having: - 14 - 60982S / 088S OOPY - polyisobutylene 50 wt .-% - butyl rubber 10% by weight
Carbon black 17.3% by weight - zeolites 20% by weight Molecular sieve 2.5% by weight. 11. insulating washer according to claim 9 or 10, characterized in that the molecular sieve is a mixture consists of two molecular sieves, one of which has adsorption pores of the order of 4 angstroms and the other Has adsorption pores on the order of 10 Angstroms with the following ratio: Sieve pores with 4 Angstroms: 0 to 4 total weight. -% of the strand sieve pores with 10 angstroms: 0 to 1 total weight. -% of the strand. 12. An insulating washer according to one or more of the claims 6 to 11, characterized in that the intermediate strand has a thickness of more than 4 mm and preferably of more than 12 mm. 6-0982S / Ö8S5 Blank page