CA1261900A

CA1261900A - Sealing layer

Info

Publication number: CA1261900A
Application number: CA000490777A
Authority: CA
Inventors: Masanori Midooka; Takashi Kubo; Atsunobu Fujikawa; Masanori Motoda
Original assignee: Toyota Motor Corp; Toyoda Gosei Co Ltd
Current assignee: Toyota Motor Corp; Toyoda Gosei Co Ltd
Priority date: 1984-09-17
Filing date: 1985-09-16
Publication date: 1989-09-26
Also published as: DE3532961A1; US4708351A

Abstract

ABSTRACT OF THE DISCLOSURE
The present invention relates to a sealing layer that seals the gap between the body or window glass and the weatherstrip attached to the door, window, trunk, roof side, etc. of an automobile, and also to a weatherstrip, automotive body, and glass plate provided with said sealing layer. The water-absorbing material swells upon absorption of water, sealing the fitting part of the weatherstrip. The water-absorbing material is made of a mixture of a water-absorbing polymer and rubber or synthetic resin. The sealing layer is formed on the fitting part of the weatherstrip, body, or window glass at which the weather-strip is fitted to the automotive body or the window glass is fitted to the weatherstrip.

Description

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The present invention relates to a sealing layer that seals the gap between -the body or window glass and the weather-strip a-ttached to bhe door, window, trunk, roof side, etc. o-f an automobile, and also to a weatherstrip, autGmotive body and glass plate provided with said sealing layer.
The doors, windows, trunk, roof sides, etc. of an auto-mobile are provided with a variety of sealing materials to prevent the entrance of rainwater and washing water.
An example of the sealing materials is a weatherstrip attached to the trunk of an au-tomobile. In a conventional one, the opening of the body at the trunk has a flange which pro-jects upward and the flange is provided with a weatherstrip in a continuous form. The trim having an inverted U cross-section has an integrally formed projecting seal lip which comes into close contact with the outside edge of the opening of the body.
plurality of retaining lips are integrally formed on the opposing insides of the trim so that they hold the flange between them. The trim also has an integrally formed drip lip which extends on the outside of the body, with the end thereof in close contac-t with the opening of the body. The trim has an integrally fonmed ridge at its upper part, and to the top of the ridge is bonded by vulcanization the seal pipe ~hich is pressed by the trunk lid.

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The weatherstrip of the s-tructure mentioned above has the following disadvan~age. If -the weatherstrip is not unifonn in dimensions, the mounting of the weatherstrip is not complete, or the precision of the body construction is not so good, the wffather~rip attached to the flange does not provide complete sealing. That is, there remain spaces between the body opening and the seal lip and drip lip, or between the retaining lips and the flange. These spaces permit rainwater and washing water to enter the body.
To eliminate this trouble, an adhesive or caulking mate-rial is forced into the part where the weatherstrip is attachedto the body. However, not only is this procedure troublesome, but also it has a disadvantage in that some portion o~ the injected adhesive enters the body because the filling amount cann~t be confirmed.
On the other hand, a variety of sealing materials are used to keep water out in the part where a glass plate is mounted on the automotive body or a building sash. For example, a sealing material is known which is attached to the parts of an auto-motive body where windshield, rear glass, and side glasses are mounted. The weatherstrip made of synthetic rubber is attached to the body flange and the glass is fitted into the groove with an adhesive interposed between the weatherstrip and the glass.
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The above-mentioned sealing method still has some dis-advantages. If the glass does not accurately match the body, the weatherstrip is deformed and a space is formed between the weatherstrip and the glass. This space permits the entrance of water into the body. Moreover, the adhesive applied to the groove does not completely prevent the entrance of water because it is impossible to make sure visually that the adhesive has been applied uniformly. In addition, the application of the adhesive is a troublesome work.
The present invention seeks to provide a sealing layer that certainly seals the gap between the body or windcw glass and the weatherstrip attached to the door, window, trunk, roof side, etc. of an automobile.
The present invention also seeks to provide a sealing layer that certainly prevents rainwater or washing water from entering the body even in the case where the weatherstrip is not uniform in dimensions and the glass is not accurately or completely mounted on the body. ~
Still further the present mvention seeks to provide a weatherstrip, body, and glass plate which provide an improved sealing between the weatherstrip and the body or the glass plate at the doors, windows, trunk and roof side of an auto-mobile.

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Still further the present invention seeks to provide a glass plate which provides an improved sealing between the glass and the sash of a building or the frame of a view port on a machine.
The ~eallng layer o this invention comprises a water-swelling material that swells upon absorption of water to enhance sealing, said water-swelling material being applied to the part at which the automotive w~atherstrip is fitted to another member.
. More especially, in accordance with the invention there is provided a sealed joint comprising: a first member; a second member; one of said first and second members having a portion fitted into a recess provided in the other of said first and second members; one of said first and second members on said porti.on and the other of said first and second members in said recess constituting a seal for normally sealing with the respective said other of said first and second members in said recess and said one of said first and second members on said portion for preventing infiltration of rain and washing water frcm one side of said sealed jo m t to an opposite side of said sealed joint; a layer of water-swelling materiaI, whlch swells upon absorption of water to enhance sealing, being provided between sald first and said second nenbers at least partly ~' .
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within said recess, -this layer being present in a sufficient quantity to re-esti~blish a seal between said first and second members should said seal for normally sealing fail and leak water go that such water aontà~ts sàid layer o~ water-swelling material and causes said layer to sw~ll. ' The weatherstrip, autemotive body and glass of this inven-tion are provided at their fitting parts with a sealing layer of water-swelling material.
The invention is further explained and illustrated by reference to the accompanying drawings and various advantages not referred to herein will occur to one skilled in the art upon employment of the invention in practice.
Fig. 1 is a sectional view of the first emkodiment of this invent,ion which is a weatherstrip for the automotive trunk.
E`ig. 2 is a sectional view of the second embodiment of this invention which is a weatherstrip for the automotive door.
Fig. 3 is a sectional view of the third embodiment of this invention which is a weatherstrip for the automotive roof side.
Fig. 4 is a sectional view of the fourth embodiment of 20 this inventlon which is a weatherstrip for the autamotive stationary window glass.

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1~6~0 13 Fig, 5 is a sectional view of the ~ifth embodiment of this lnven-tion which is a weatherstrip used as a glass run on the automotive window frame.
Fig, 6 is a sectional view of the sixth embodiment of this inven-tion which is a body to which is i'itted the weatherstrip for the automotive trunk, Fig, 7 is a sectional view of the eighth embodiment of this inven-tion which is a body to which is fitted the weatherstrip ~or the automotive roof side, Fig. 8 is a sectic\nal view o~ the ninth embodiment of this lnven-tion which is a body to which is i~itted the automotive stationary window glass, Fig, 9 is a sectional view of the tenth embodiment of this inven-tion which is a body to which is fitted a weather~trip used as a glass run on the automotive window frame, Fig, 10 and Fig, 11 are an exploded perspecl;ive view and a sec~
tlonal view, respectively, o~ the eleventh embodiment Or this invention which is the automotive windshield.
Fig, 12 is a sectional view o~ the twel~th embodiment o~ this invention uhioh is a buildlng glass plate.
Fig, 13 is a sectional view of a conventional weatherstrip for the automotive trunk and a body to which the weàtherstrlp is i~itted.
Fig. 14 is an exploded perspective view of a conventional auto-motive windshield.

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DETAILED DESCRIPTION OF ~IE -[NVENTION
The invention i9 now described with refererlce to Fig. l showing the first embodiment which is a weatherstrip ~or the automotive trunk.
The reference numeral 1 indicates the trunk opening of the body made o~ steel plate. At the edge o~ the openinK, there is a flange

(2) which projects upward. The reference numeral 3 indicates the entire body o~ a continuous weatherstrip fltted to the flange (2). The reference numeral 4 indicates the trim of the weatherstrip (3) which is made of ethylene-propylene rubber (EPDM) in U-shape. The reference numeral 5 indicates a core metal placed in the trim (4). It is formed in sections so that it does not impair the flexibility of the weather-strip (3). The reference numeral 6 indicate~ two pairs of retaining lips which pro~ect opposite to each other inside the trim (4). Each pair of the opposing retaining lips hold the flange (2) between them. A
sealing layer (7) made of water-swelllng materlal 18 formed between the lip (6) and the flange (2).
The reference numeral 8 lndicates a seal lip which is integrally formed on the weatherstrip. It pro~ect~ from the weatherstrip and its end is in close contact with the opening (1) of the body. The reference numeral 9 indicates a drip lip which is integrally ~ormed (by coextru-sion) on the trim (4), and its end is in close contact wlth the opening (1) of the body. The sealing layer (7) is also ~ormed between the seal lip (8) and the opening (1) and between the drip lip (9) and the openIng (1).

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The reference numeral 10 is a ridge inl;egrally formed on the upper part of the trim (Il). To the top of the ridge is bonded (by vulcaniza-tion) a round seal pipe (11) made o~ EPDM, whLch iS pressed by the trunk lid (T) when it i9 closed.
The water-swelling mat;erial as mentioned above means any material that swells upon absorption of water. In thLs elnbodiment, it is a mixture of carboxymethyl cellulose (as a water-absorbing polymer) and natural rubber (NR).
The sealing layer (7) is ~ormed by applying a solution of the water-swelling materlal in an organic solvent (e.g., toluene) to the speoified part of the weatherstrip (3), followed by drying and heating for vulcanization.
The water-swelling material is not limited to the one mentioned above. It may be a mixture o~ a water-absorbing polymer and a synthetic resin or a formable water-absorbing polymer alone. A durable one is a mixture of a water-absorbing polymer and a durable rubber or synthetic resin.
Examples of the water-absorbing polymer inolude carboxymethyl cellulose, staroh-polyaorylonitrile hydrolyzate, staroh-polyaorylate, polyacrylonitrlle hydrolyzate, and sodlum polyacrylate hydrolyzate.
Examples o~ the rubber to be mixed with the water-absorbing polymer inolude natural rubber, ethylene-propylene rubber (EPDM and EPM), ohloroprene rubber (CR), nitrile rubber (NBR), and styrene-butadiene rubber (SBR). Examples of the synthetio rubber to be mixed with the '' .

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water-absorbing polymer include polypropylene (PP), polyethylene (PE), and polyvinyl chloride (PVC).
Examples of the organic 301vent include volatlle solrent such as toluene, trichloroethylene, and benzene.
The above-mentioned water-swelling material may be used in the form of foam having a density of 0.4 to 0.6 g/cm3. The water absorption of a foam is greater than five times that of a solid. The foam density may ran8e ~rom 0.1 to 0.9 g/cm3.

The embodiment of the above-mentioned structure will ~ail in sealing if the weatherstrip (3) iB not aocurately and oompletely mounted on the body (1, 2), or if the weatherstrip (3) i9 degraded after use for a long period of time. The failure is a 1099 of close contact or the formation of a gap between the weatherstrip (3) and the body (1, 2).
When rainwater or washing water enters the gap, the sealing layer (7) ~ormed on the re~3peotive ends o~ the llps (6, 8, 9) absorbs water to swell .
Thus the sealing layer (7) fills the gap and restores the sealing, preventing the entrance of water into the body. In addltion, this embodiment does not need the in~eotion of an adhesive, beoause the sealing layer (7) has previously been formed on the weatherstrip (3).
The seoond embodiment o~ this invention, which is a door weather-strip mounted on the automotive window frame, is described~with referenoe to Fig. 2.
The reference numeral 21 denotes a door of ~teel plate having a channel (22) formed on its side. The reference numeral 23 indicates the . . .
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whole body of the weatherstrip ~itted to the side of the door (21). The engaging part (24) of the weatherstrip (23) is fitted into the channel (22). It i9 made of EPDM ~ponge rubber. The sealing layer (7) is formed on the engagLng part (24) and other parts of the weatherstrip which come into contact with the side o~ the door, a~ in the above-mentioned embodiment.
The re~erence numeral 27 indicates an oval seal pipe which is integrally ~ormed (by coextrusion) on the weatherstrip. It pro~ects sldeward from the engaging part (24). The reference numeral 28 lndicates a seal lip integrally formed on the weatherstrip. It also pro~ects sideward from the en8aging part (24). The seal pipe (27) and the seal lip (28) are pressed against the edge (B) of the opening of the body when the door is closed.
This embodiment produces the same ef~ect as the above-mentioned first embodlme~nt because the sealing layer (7) 19 formed between the weather strlp (23) and the ¢hannel (22) 90 that it swells when ralnwater or washlng wal;er infiltrates between them.
The thlrd embodlment o~ this invention, which is a weatherstrip for the automotive roof side, is described with re~erenoe to Fig. 3.
Thls embodiment is equivalent to the second embodiment except that the seal pipe (27) and seal lip (28) are replaced by the sealing part (30) for the window glass (G). Therefore, this embodiment produces the same effeot as that of the second embodiment.

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~ , The fourth embodlment oi' this invention, which is a weatherstrip f'or the automotive stationary window glass, is described with reference to Fig, 4, The rePerence nu~eral 31 indcates a ~ody opening which is made oP
steel plate and f'ormed at an automobile window. Also provided therein are the edge (32) and the flange (33) which peripherally extends. The reference numeral 34 indicates the entire weatherstrip of` EPDM which i9 provided to cover the f`lange (33). The EPDM weatherstrip is fixedly engag~d with the body opening (31) by means of the narrowed portion (35) Or the i'lange (33) and the pressing lip (36) to press the body surPa¢e down.
The rePerence numeral 37 indicates a pair o~ the seal lip which is integrally formed by coextrusion on the weatherstrip (3ll) at its body-contacting surPace. The ref`erence numeral 39 is a channel where window glass (G) is inserted. Sets of holdlng lips(~O)are protrudingly ~ormed inslde the channel. The seal layer (7) is, like in the case of`
f`oregoing embodiment, f`ormed on the narrowed portion (35), the channel (39), the holdlng lip (36), and its edge-contactlng areas as well as the edge-contacting areas of the seal lips (37).

This embodiment also produces the same ef`fect a~ that of` the above-mentioned embodiment.
The PiPth embodiment oP this invention, which is a weatherstrip as a glass run of the automotive window ~rame, is described with re~erence to Fig. 5. This embodiment is equivalent to the second embodiment except that the seal pipe (27) and seal lip (28j are replaced by the slide sealing part (1l1) for the window glass (G). Theref`ore, thls ~ 10 -.i~ .

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embodiment also produces the same effect as that of the second embodiment.
The sixth embodiment of thls invention, whioh is an automotive body to which is fitted the weatherstrip for the automotive trunk, i9 described with reference to Fig. 6.
This embodiment differs from the above-mentioned first embodiment in the position where the ~ealing layer (7) is formed. The sealing layer (7) is formed all over the body opening (1) and the flange (2).

It extends from the parts where the drip lip (9) comes into contact with the body opening (l) to the part where the retaining lips (6) come into contact with the flange (2).
If a gap is formed between the weatherstrip (3) and the body (l, 2) and rainwater or washing water enters the gap, the sealing layer formed on the body (l, 2) absorbs water to swell. Thus, as in the above-mentioned first embodiment, the sealing layer (7) fills the gap and presses against the weatherstrip to ensure ~ealing and prevent the entranoe of water into the body.
The seventh embodlment of this invention, which l~ a body to which is fitted a weatherstrip for the automotive door, differs from the second embodiment shown in Fig. 2 in that the sealing layer (7) is formed on the inside of the channel (22) of the door (21), whereas the sealing layer (7) is formed on the engaging part (24) of the weather-strip (23) in the seconcl embodiment. Therefore, this embodiment also produces the same effect as that of the second embodiment when water enters the gap between the channel (22) and the weatherstrip (23).

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The eighth ~mbodiment of thls invention, whlch is a body to which i~ fitted a weatherstrip for the automotlve roof side, i~ de~oribed wlth reference to Fig 7. This embodiment is equivalent to the above-mentioned third embodiment exoept that the sealing layer (7) is formed on the inside of the channel (22) to which the weatherstrip is fitted.
Therefore, this embodiment also produces the same e~ect as that o~ the third embodiment.
The ninth embodiment of thi~ invention, which ls a body to which the automotive stationary window glass i9 fitted, is described with reference to Fig. 8. This embodiment is equivalent to the above-mentioned fourth embodiment except that the sealing layer t7) is formed on the end (32) of the opening (31) with which the holding part (35), the pressing lip (36), and the seal lips (37) come into contact.
There~ore, this embodiment produces the same effect as that of the above-mentione~d embodiment~.
The tenth embodiment of this invention, which is a body to which is fitted the weatherstrip as the glas~ run of the automotive window frame, is described with reference to Fig. 9. This embodiment is equivalent to the above-mentioned fifth embodiment exoept that the sealing layer (7) is formed on the inslde of the channel (22) of the body where the weatherstrip is mounted. Therefore, this embodiment also produoes the same e~fect as that of the fi~th embodiment.
The eleventh embodiment of this invention, which is a sealing structure for the automotive windshield, is described wLth reference to Figs. 10 and ll. The referenoe numeral 51 indicates a weatherstrip ~ 12 -,. :. ~ '.. : - '' ~ ~ ;

fixed to the flange (52). On the top of the weclther3trip, there i~
formed a fitting groove (54) into which the wLncl~hie:Ld (53) is fitte-l.
The reference numeral 56 indicates a molding fitted into the recess (55) ~ormed on the outside (lefl; side in Fig. 10) of the weatherstrip (52).
It is an ornament for the periphery of the windshield. The reference numeral 57 indicates a lip which projects downward from the lower part of the said recess (55). The end of the lid is pressed against the body, which prevents water from entering the body along the flange (52).
The reference numeral 61 indicates a sealing layer formed on the end of the windshield (53). The width of the sealing layer i9 a little Breater than the depth of the fitting groove (51l). The sealing layer (61) together with the windshield (53) are fitted into the fitting groove (54).
The sealing layer (61) is made of a water-swelling material. In other words, it i5 formed by applying a solution of a water-swelling material in an organic solvent (e.g., toluene) to the end of the windshield (53), followed by drying and heating for vulcanization.
In the c~lse where the windshield-to-body fitting is not accurate, or when the weatherstrip (51) is degraded after use for a long period of time, a gap is formsd between the fitting groove (54) and the windshield (53). When rainwater or washing water enters the gap, the sealing layer (61) made of a water-swelling material absorbs water to expand. Thus the sealing layer (61) fills the gap and presses against the fitting groove (54), whereby preventing the entrance of water into the body. In . . : .

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the meantime, the structure that the sealing layer (61) is formed on the windshield (53) simplifies the assembly work.
The twelfth embodiment oi' this invention, which i8 a building glass plate, is described with reference to Fig. 12.
The reference numeral 66 indicates a rubber seal attached to the building window sash (65). The rubber seal (66) has at its center a fitting groove (68) into which the window glass (67) is fitted. The reference numeral 69 is a sealing layer formed on the end of the window glass (67). The width of the sealing layer is a little greater than the depth of the fltting ~sroove (68). The sealing layer (69) together with the glass plate (67) are fitted into the fitting groove (68). The sealing layer is made of a water-swelling material as in the above-mentioned embodiments. Thus this emobodiment also produces the same effect as that o~ the above-mentioned embodiments.
The present invention is not restricted to the above-mentioned embodiments; but it may be reduced to practice as follows:
(1) In the above-mentioned embodiments, vulcanization is accom-plished by heating the weatherstrip (3, 23, 34) and the windshi~ld (53).
In another embodiments, vuloanization is accomplished naturally before or after the weatherstrip (3, 23, 34) and the windshield (53) are attached to the automotive body.
(2) The water-swelling material may be mixed with an epoxy-, urethane-, PE-, or rubber-based adhesive.

(3) The water-swelling material may be applied by brushing, dipping, or spraying.

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(4) The water-swelling material may also be applied to the seal pipe (11, 27), seal lip (28), sealing part (30) and slide seal part ~41) on the weatherstrip (3, 23).

(5) The weatherstrip (3, 23, 34) may be made of synthetic rubber or synthetic resin.

(6) The amount and expansion ratio of the water-swelling material may be properly selected according to the desired sealing pressure.

(7) The windshield (53) and window glass (67) in the eleventh and twelfth embodiments may be transparent resin plates such as polyacrylate and polycarbonate.

(8) In the eleventh and twelfth embodimçnts, the width of the sealing layer (61, 69) is specified; but the sealing layer (61, 69) may be formed only on the bottom of the fitting groove (54, 68) to which the windshield (53) or the windo~ glass (67) is fitted.

(9) This invention may be reduced to practice for the glass plate of building and construction equipment and for the glass plate of inspection hole on the factory machines, in addition to the windshield (53) and building glass plate (67) in the eleventh and twelfth embodiments.

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A conventional weatherstripping is briefly described with reference to Fig. 13. r~e opening (91) of the body at the trunk has a flange (92) which projects upward and the flange (92) is provided with a weatherstrip (93) in a continuous form.
The trim (94) having an inverted U cross-section has an integrally formed projecting seal lip (95) which comes into close contact with -the outside edge of the opening (91) of the body. A plurality of retaining lips (96) are integrally formed on the opposing insides of the trim (94), so that they hold the flange (92) between them. The trim (94) also has an integrally formed drip lip (97) which extends on the outside of the body, with the end thereof in close contact with the opening (91) of the body. The trim (94) has an integrally fonmed ridge (98) at its upper part, and to the top of the ridge is bonded by vul-canization the seal pipe (99) which is pressed by the trunk lid (T).
The weatherstrip (93) of the structure mentioned above has the following disadvantage. If the weatherstrip (93) is not unifonm in dlmensions, the mounting of the weatherstrip is not complete, or the precision of the body construction is not so good, the weatherstrip (93) attached to the flange (92) does not provide complete sealing. That is, there remain spaces between the bod~ opening (91) and the seal lip (95) and drip . .

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lip (97), or between the retaining lips ~96) and the flange (92). These ~paces pe~mit rainwater and wa0hing water to enter the body.
To eliminate this trouble, an adhesive or caulking mate-rial is forced into the part where the weatherstrip (93) is attached to the body. However, not only is this procedure troublesome, but also it has a disadvantage in that some portion of the injected adhesive enters the body because the filling amount cannot be confirmed.

On the other hand, a variety o~ sealing materials are used to keep water out in the p æ t where a glass plate is mounted on the automotive body or a building sash. For example, a sealing material as shown in Fig. 14 is attached to the parts of an automGtive body where windshield, re æ glass and side glasses æe mounted. The weatherstrip (83) made of synthetic rubber is attached to the body flange (82) and the glass (81) is fitted into the groove (84), with an adhesive (85) interposed between the weatherstrip (83) and the glass (81).
The above-mentioned sealing method still has some dis-advantages. If the glass(81) does not accurately match thebody (82), the weatherstrip (83) is deformed and a space is formed between the weatherstrip (83) and the glass (81). This space permits the~entrance of water into the body. Mbreover, ., .~ .r - ~

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the adhesive (85) applied to the groove (84) does not com-pletely prevent the entrance of water because it is impossible to make sure visually that the adhesive (85) has been applied unifonmly. In addition, the application of the adhesive (85) is a troublesome work.
As many apparently widely different embodiments of this invention may be made without dep ætment frcm the spirit and scope thereof, it i5 to be understood that the invention is not limited to the specific embodiments thereof except as defined in the appended claims.

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Claims

The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows:

1. A sealed joint comprising:
a first member;
a second member;
one of said first and second members having a portion fitted into a recess provided in the other of said first and second members;
one of said first and second members on said portion and the other of said first and second members in said recess constituting a seal for normally sealing with the respective said other of said first and second members in said recess and said one of said first and second members on said portion for preventing infiltration of rain and washing water from one side of said sealed joint to an opposite side of said sealed joint;
a layer of water-swelling material, which swells upon absorption of water to enhance sealing, being provided between said first and said second members at least partly within said recess, this layer being present in a sufficient quantity to re-establish a seal between said first and second members should said seal for normally sealing fail and leak water so that such water contacts aid layer of water-swelling material and causes said layer to swell.

2. The sealed joint of claim 1, wherein the water-swelling material is made of a mixture of a water-absorbing polymer and a rubber or synthetic resin.

3. The sealed joint of claim 2, wherein the water-absorbing polymer is any one of the carboxy-methyl cellulose, starch-polyacrylonitrile hydro-lyzate, starch-polyacrylate, polyacrylonitrile hydro-lyzate and sodium polyacrylate hydrolyzate.

4. The sealed joint of claim 2, wherein the rubber is selected from the group consisting of natural rubber, ethylene-propylene rubber, chloro-prene rubber, nitrile rubber and styrene-butadiene rubber.

5. The sealed joint of claim 2, wherein the synthetic resin is selected from the group consisting of polypropylene, polyethylene and polyvinyl chloride.

6. The sealed joint of claim 1, wherein the water-swelling material is a foamed material.

7. The sealed joint of claim 6, wherein the foamed material has an expansion ratio such that the density of the water-swelling material is 0.1 to 0.9 g/cm3.

8. The sealed joint of claim 1, wherein:
one of said first and second members is made of rubber.

9. The sealed joint of claim 8, wherein:
the other of said first and second members is an automotive body sheet member.

10. The sealed joint of claim 9, wherein:
said rubber member is an automotive weather-strip.

11. The sealed joint of claim 1, wherein:
one of said first and second members is a sheet of window glazing material and the other of said first and second members is a window framing member.