CA1162115A - Thermo-adhesive elastic yarn - Google Patents
Thermo-adhesive elastic yarnInfo
- Publication number
- CA1162115A CA1162115A CA000388197A CA388197A CA1162115A CA 1162115 A CA1162115 A CA 1162115A CA 000388197 A CA000388197 A CA 000388197A CA 388197 A CA388197 A CA 388197A CA 1162115 A CA1162115 A CA 1162115A
- Authority
- CA
- Canada
- Prior art keywords
- thermo
- yarn
- adhesive
- elongate
- elastic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
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- Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
A thermo-adhesive elastic yarn comprises an elongate elastic element combined with at least one other elongate element coated with a thermo-adhesive substance and is attached under tension to a backing to form gatherings in the latter.
A thermo-adhesive elastic yarn comprises an elongate elastic element combined with at least one other elongate element coated with a thermo-adhesive substance and is attached under tension to a backing to form gatherings in the latter.
Description
l ~ ~21 1 5 The present i.nventi.on relates to elastic yarns designed to be added to soft backi.ngs wi.th a view to forming a gather in at least parts thereof.
The technical fi.eld concerned i.s, more particularly but not exclusively, that of clothing i.n general, i.e. i.ncludi.ng all the elements whi.ch can be deemed to contribute to the protecti.on, the adornment, the dressi.ng and/or the ornamentation of all or part of the human body, whether or not these elements are visible.
In the aforesaid techni.cal fi.eld, it is known to produce items of clothi.ng which have, either i.n parts, or along edges, elasti.cally deformable gathered areas by which they are adequately held on the body wi.th no interference to the wearer.
Up to now, i.t has been known to produce types of hems wherei.n elasti.c yarns are introduced and immobi.lized by tensi.on stitchi.ng, so that when the tension is released the result is a gathering. Another known method consists also in weaving, locally at least, a stretched elasti.c yarn with the yarns consti.tuti.ng the i.tem of clothi.ng, so as t.o produce, after slackening, a gatheri.ng which i.s perpendi.cular to the line of elasti.c yarn.
The aforesai.d methods present certai.n advantages but they are not practi.cal to use when the element consti.tuti.ng the i.tem of clothing i.s a sheet or strip of woven or non-woven synthetic materi.al. Such methods are not sui.table either for 3~
~ ~ ~211 5 the mass-production of articles as they do not allow fast rates of production.
In the above cases, it has been proposed to replace the known soluti.ons by fitti.ng an elasti.c band consti.tuted by a flat yarn attached by adhesi.ve means to the support desi.gned to receive it.
The manufacturi.ng techni.que which is known in this fi.eld consists in arranging for a strPtched flat yarn to unwind, said yarn containing adhesive spots. In a subsequent operation, the yarn is laid on the support and held i.n contact therewith by the appli.cati.on of a pressure and a temperature designed to polymerize the adhesive.
Such a manufacturing technique is not suitable for mass-production as it is necessary to provide a relatively complex installation for the unwindi.ng and stretchi.ng of the flat elasti.c yarn, and for depositing the adhesive spots by means of small si.zed nozzles, in order to prevent the glue from formi.ng threads or from running.
Besides the high cost of these i.nstallati.ons, thei.r complexity also necessi.tates di.ffi.cult maintenance whi.ch can often i.nterrupt producti.on li.nes i.n the mass-producti.on of arti.cles for wi.de di.stri.bution.
It i.s an object of the present i.nvention to mi.ti.gate the aforesai.d problems by providi.ng novel elasti.c yarn having the particular feature of being provided wi.th means for joining i.t to a support, so that yarn ana the support can be joi.ned together easi.ly at hi.gh speed, i.n mass-production lines, wi.thout necessi.tati.ng the use of substanti.al additional equipment which is expensi.ve and complex to mai.ntain.
The i.nvention provides thermo-adhesive elasti.c yarn designed to be applied and attached to a backing and comprisi.ng an elongate elasti.c element associated wi.th at least one second elongate element and forming with the second elongate element an elastically stretchable combination, the second elonyate element being adapted to be at least partly moved relatively to the fi.rst elongate element and the second element bei.ng coated a thermo-adhesi.ve substance at least at spaced locations along the second elongate element.
The i.nvention will be more readily understood on lS readi.ng the followi.ng descri.pti.on of embodiments t.hereof with reference to the accompanying drawi.ngs, in whi.ch:
Fi.gure 1 is a partial vi.ew of an elastic yarn embodyi.ng the inventi.on, bei.ng stretched.
Fi.gure 2 is a si.mi.lar vi.ew to Figure 1 showi.ng another embod;.ment of the present yarn.
Fi.gures 3 and 4 are partial elevat.i.onal vi.ews showi.ng two other possi.ble embodiments of the invention.
Fi.gure 1 shows that, according to the first i.llustrated example, the present yarn compri.ses an elasti.c core 1 i.n any suitable materi.al, whi.ch can be of circular cross-section, ~ 1~2~15 preferably, or i.n some cases, of square or rectangular cross-secti.on, then consti.tuting a sort of elastically deformable ribbon.
The core 1 i.s associ.ated with a wrapping yarn 2 whi.ch is wound into successi.ve heli.cal coils, whi.ch coils can be mutually adjacent when the core 1 is not stretched. The wrapping yarn 2 may be a mono-fi.lament or multi-filament, natural, artificial or syntheti.c fiber.
The wrappi.ng yarn 2, herei.nafter referred to as the external wrapping yarn, is associ.ated with a thermo-adhesive substance, deposited, at least at spaced locati.ons, on the coils 3. Preferably, the thermo-adhesive substance i.s composed of a resin, such as for example, that commercialized under the trademark 'ELVAX 4310' whi.ch can be defined as being an ethylene/vinyl acetate/organic aci.ds terpolymer. The thermo-adhesi.ve substance can be deposi.ted i.n several suitable ways on the coils 3, or it can alternati.vely be coated over the entire surface of the external wrappi.ng yarn.
It is also possi.ble in certai.n cases to deposi.t the thermo-adhesive substance on the coi.ls 3 after these have been wound on the core 1.
The elasti.c yarn covered as explained hereinabove can be stretched before being appli.ed on a support. As illustrated in Figure 1, the different coils, as a result, are relatively spaced apart, consti.tuting then joi.ni.ng points with the support l ~2115 by way of the thermo adhesive substance with which they are coated. The application and joint at the interface level can then be ensured in practical manner by passing the support and the stretched covered yarn between the elements of a pressurized applicator, in which the tmeperature is raised in order to soften the thermo-adhesive substance sufficiently to make pinpoint joints between the yarn and the support.
By way of example, when applying the elastic yarn on a synthetic support such as in vinyl polychloride, the working parameters to ensure a joint between the yarn according to the invention coated with the product sold under the trademark 'ELVAX 4310' and the support, are as follows:
pressure.................... about 1 kg temperature................. between 50 and 110C
duration.................... less than or substantially equal to 1 sec.
When applying the yarn on a cotton support, the working parameters applied are as follows:
pressure.................... about 1 kg.
temperature................. between 50 and 150C
duration.................... between 1 and 5 secs.
The tensile stress applied to the core 1 is of course dependent of the characteristics of the material of the core and of the desired gathering.
The covered yarn according to the invention is ~ 1~2115 inexpensi.ve to produce and i.ts appli.cation on a support requires no particularly complex or deli.cate i.nstallation for aeposi.ting the spots of adhesive. As a result, the costs of production and maintenance of the machines requi.red to apply such a yarn on any type of support i.s consi.derably reduced. It also becomes possible to set up conti.nuous production li.nes of articles or clothing which can be mass-produced at lower costs.
Another advantage of the present elastic yarn resi.des in that, as shown from experi.ence, a saving is made in the amount of adhesive used, since the adhesi.ve substance may be more wi.dely distributed than i.n pri.or art products and it is not necessary to deposit large blobs of the adhesi.ve as in prior art techniques.
The present yarn may be used in many fields, and more parti.cularly i.n the clothi.ng field. In that fi.eld, the present yarn is useful in parti.cular for the producti.on of babies nappies, protective masks, caps, dust-covers, underclothes and overalls.
Another field of appli.cati.on i.s t.hat of household linen and i.n particular fitt:ed sheets.
Fi.gure 2 shows a modi.fi.ed embodiment wherei.n the yarn compri.ses the core 1 on which a wrapping yarn 4, termed 'i.nternal', is wound i.n coi.ls 5 which are mutually adjacent when the core 1 i.s not stretched. Preferably, the external wrapping yarn 2, described hereinabove, is then wound around the assembly l ~ 62~1~
consti.tuted by the core 1 and the i.nternal wrapping yarn 4, in a winding direction whi.ch i.s reverse to that of the yarn 4, so as to obtain two guperimposed wi.ndi.ng layers.
Such a structure gives a well-balanced fi.nished yarn and eli.minates ~he ri.sks of the core l kinking when this is only associated to one wrapping yarn.
In certain cases, it may be recommended to use an internal wrappi.ng yarn 4, which has the same material as the external wrapping yarn 2.
In certai.n cases also, the i.nternal wrappi.ng yarn 4 can be associated to a thermo-adhesi.ve substance deposited as indi.cated herei.nabove, ei.ther at the level of the coils 5 prior to the wi.nding of the external wrapping yarn 2, or else by pri.or coating of the yarn 4. In such a case, the relative pressurizing at a given temperature and for a predetermined period between the yarn and the support enables the contact points between the latter to be multi.pli.ed and also joi.ns the coi.ls 3 and 5 together at their points of i.ntersecti.on.
Fi.gure 3 shows a further embodi.ment wherei.n the yarn compri.ses an elasti.c strand la, shown in the drawi.ng as bei.ng of ci.rcular cross-secti.on. It must be understood that any other cross-secti.on is also suitable. The strand la, which plays the part of the core l i.n the foregoi.ng examples, i.s associ.ated wi.th a second strand 6 whi.ch can have the same composition as the wrapping yarns 2 and 4 and be likewi.se previously coated with 1 ~ ~21 1 ~
the thermo-adhesi.ve substance.
The strand 6 and the strand la are combi.ned by twi.sting and throwing when the elastic strand la is stretched. The resulting comb;.nati.on is constituted, when the strand la ;.s slackened off, by a succession of adjacent coils 7 and 8 of the elasti.c strand la and the strand 6 in alternate succession.
The aforesaid yarn i.s used as previously indicated by stretching the combination so as to separate the different successive coi.ls 7 and 8. The combi.nation thus stretched is then placed on a support as previ.ously i.ndi.cated, pressure and heat bei.ng appli.ed for a speci.fi.c period of time. This softens the thermo-adhesive substance, at least where coils 8 are in contact wi.th the support. The result i.s an assembly by successive points of adhesi.on, whi.ch poi.nts become further spaced apart from one another as the stretchi.ng force i.s increased.
Fi.gure 4 i.llustrates another embodi.ment of the elasti.c yarn according to the invention wherein the yarn compri.ses an elastic strand lb whi.ch can be compared to the core 1. The strand lb i.s stretched and combined wi.th a strand 9 whi.ch is kni.tted to form successive sti.tches whi.ch are pulled when the yarn is stretched as shown in the drawi.ng. The strand 9 can be a si.ngle-fi.lament or a multi.-fi.lament, as aforedescribed, and is coated, at least locally, with the thermo-adhesive substance preferably before bei.ng kni.tted around the elastic strand lb.
l i 6~115 The resulti.ng pulled state of the combi.nati.on i.s i.llustrated i.n Figure 4 to show that: i.n the yarn obtai.ned, there is for each sti.tch, laterally to the strand lb, on the one hand one 1OGP and on the other hand two, and that the lateral distribution of these loops is reversed from one stitch to the next. The different loops represent, after the aforesaid application, joining points between the support and the combi.nati.on via the thermo-adhesi.ve substance.
In the foregoi.ng, i.t is i.ndicated that the yarn is pulled and then applied to a support. Thi.s joi.ni.ng method can, i.t i.s true, be used over the enti.re length of a segment of yarn which i.s to be enti.rely applied to a support, or over only part of the length of such a segment whi.ch i.s also requi.red to form a joi.ning element, such as a bar, loop, etc...
The inventi.on is in no way li.mited to the descri.ption gi.ven hereinabove and on the contrary covers any modificati.ons whi.ch can be made thereto wi.thout departing from the scope thereof.
The technical fi.eld concerned i.s, more particularly but not exclusively, that of clothing i.n general, i.e. i.ncludi.ng all the elements whi.ch can be deemed to contribute to the protecti.on, the adornment, the dressi.ng and/or the ornamentation of all or part of the human body, whether or not these elements are visible.
In the aforesaid techni.cal fi.eld, it is known to produce items of clothi.ng which have, either i.n parts, or along edges, elasti.cally deformable gathered areas by which they are adequately held on the body wi.th no interference to the wearer.
Up to now, i.t has been known to produce types of hems wherei.n elasti.c yarns are introduced and immobi.lized by tensi.on stitchi.ng, so that when the tension is released the result is a gathering. Another known method consists also in weaving, locally at least, a stretched elasti.c yarn with the yarns consti.tuti.ng the i.tem of clothi.ng, so as t.o produce, after slackening, a gatheri.ng which i.s perpendi.cular to the line of elasti.c yarn.
The aforesai.d methods present certai.n advantages but they are not practi.cal to use when the element consti.tuti.ng the i.tem of clothing i.s a sheet or strip of woven or non-woven synthetic materi.al. Such methods are not sui.table either for 3~
~ ~ ~211 5 the mass-production of articles as they do not allow fast rates of production.
In the above cases, it has been proposed to replace the known soluti.ons by fitti.ng an elasti.c band consti.tuted by a flat yarn attached by adhesi.ve means to the support desi.gned to receive it.
The manufacturi.ng techni.que which is known in this fi.eld consists in arranging for a strPtched flat yarn to unwind, said yarn containing adhesive spots. In a subsequent operation, the yarn is laid on the support and held i.n contact therewith by the appli.cati.on of a pressure and a temperature designed to polymerize the adhesive.
Such a manufacturing technique is not suitable for mass-production as it is necessary to provide a relatively complex installation for the unwindi.ng and stretchi.ng of the flat elasti.c yarn, and for depositing the adhesive spots by means of small si.zed nozzles, in order to prevent the glue from formi.ng threads or from running.
Besides the high cost of these i.nstallati.ons, thei.r complexity also necessi.tates di.ffi.cult maintenance whi.ch can often i.nterrupt producti.on li.nes i.n the mass-producti.on of arti.cles for wi.de di.stri.bution.
It i.s an object of the present i.nvention to mi.ti.gate the aforesai.d problems by providi.ng novel elasti.c yarn having the particular feature of being provided wi.th means for joining i.t to a support, so that yarn ana the support can be joi.ned together easi.ly at hi.gh speed, i.n mass-production lines, wi.thout necessi.tati.ng the use of substanti.al additional equipment which is expensi.ve and complex to mai.ntain.
The i.nvention provides thermo-adhesive elasti.c yarn designed to be applied and attached to a backing and comprisi.ng an elongate elasti.c element associated wi.th at least one second elongate element and forming with the second elongate element an elastically stretchable combination, the second elonyate element being adapted to be at least partly moved relatively to the fi.rst elongate element and the second element bei.ng coated a thermo-adhesi.ve substance at least at spaced locations along the second elongate element.
The i.nvention will be more readily understood on lS readi.ng the followi.ng descri.pti.on of embodiments t.hereof with reference to the accompanying drawi.ngs, in whi.ch:
Fi.gure 1 is a partial vi.ew of an elastic yarn embodyi.ng the inventi.on, bei.ng stretched.
Fi.gure 2 is a si.mi.lar vi.ew to Figure 1 showi.ng another embod;.ment of the present yarn.
Fi.gures 3 and 4 are partial elevat.i.onal vi.ews showi.ng two other possi.ble embodiments of the invention.
Fi.gure 1 shows that, according to the first i.llustrated example, the present yarn compri.ses an elasti.c core 1 i.n any suitable materi.al, whi.ch can be of circular cross-section, ~ 1~2~15 preferably, or i.n some cases, of square or rectangular cross-secti.on, then consti.tuting a sort of elastically deformable ribbon.
The core 1 i.s associ.ated with a wrapping yarn 2 whi.ch is wound into successi.ve heli.cal coils, whi.ch coils can be mutually adjacent when the core 1 is not stretched. The wrapping yarn 2 may be a mono-fi.lament or multi-filament, natural, artificial or syntheti.c fiber.
The wrappi.ng yarn 2, herei.nafter referred to as the external wrapping yarn, is associ.ated with a thermo-adhesive substance, deposited, at least at spaced locati.ons, on the coils 3. Preferably, the thermo-adhesive substance i.s composed of a resin, such as for example, that commercialized under the trademark 'ELVAX 4310' whi.ch can be defined as being an ethylene/vinyl acetate/organic aci.ds terpolymer. The thermo-adhesi.ve substance can be deposi.ted i.n several suitable ways on the coils 3, or it can alternati.vely be coated over the entire surface of the external wrappi.ng yarn.
It is also possi.ble in certai.n cases to deposi.t the thermo-adhesive substance on the coi.ls 3 after these have been wound on the core 1.
The elasti.c yarn covered as explained hereinabove can be stretched before being appli.ed on a support. As illustrated in Figure 1, the different coils, as a result, are relatively spaced apart, consti.tuting then joi.ni.ng points with the support l ~2115 by way of the thermo adhesive substance with which they are coated. The application and joint at the interface level can then be ensured in practical manner by passing the support and the stretched covered yarn between the elements of a pressurized applicator, in which the tmeperature is raised in order to soften the thermo-adhesive substance sufficiently to make pinpoint joints between the yarn and the support.
By way of example, when applying the elastic yarn on a synthetic support such as in vinyl polychloride, the working parameters to ensure a joint between the yarn according to the invention coated with the product sold under the trademark 'ELVAX 4310' and the support, are as follows:
pressure.................... about 1 kg temperature................. between 50 and 110C
duration.................... less than or substantially equal to 1 sec.
When applying the yarn on a cotton support, the working parameters applied are as follows:
pressure.................... about 1 kg.
temperature................. between 50 and 150C
duration.................... between 1 and 5 secs.
The tensile stress applied to the core 1 is of course dependent of the characteristics of the material of the core and of the desired gathering.
The covered yarn according to the invention is ~ 1~2115 inexpensi.ve to produce and i.ts appli.cation on a support requires no particularly complex or deli.cate i.nstallation for aeposi.ting the spots of adhesive. As a result, the costs of production and maintenance of the machines requi.red to apply such a yarn on any type of support i.s consi.derably reduced. It also becomes possible to set up conti.nuous production li.nes of articles or clothing which can be mass-produced at lower costs.
Another advantage of the present elastic yarn resi.des in that, as shown from experi.ence, a saving is made in the amount of adhesive used, since the adhesi.ve substance may be more wi.dely distributed than i.n pri.or art products and it is not necessary to deposit large blobs of the adhesi.ve as in prior art techniques.
The present yarn may be used in many fields, and more parti.cularly i.n the clothi.ng field. In that fi.eld, the present yarn is useful in parti.cular for the producti.on of babies nappies, protective masks, caps, dust-covers, underclothes and overalls.
Another field of appli.cati.on i.s t.hat of household linen and i.n particular fitt:ed sheets.
Fi.gure 2 shows a modi.fi.ed embodiment wherei.n the yarn compri.ses the core 1 on which a wrapping yarn 4, termed 'i.nternal', is wound i.n coi.ls 5 which are mutually adjacent when the core 1 i.s not stretched. Preferably, the external wrapping yarn 2, described hereinabove, is then wound around the assembly l ~ 62~1~
consti.tuted by the core 1 and the i.nternal wrapping yarn 4, in a winding direction whi.ch i.s reverse to that of the yarn 4, so as to obtain two guperimposed wi.ndi.ng layers.
Such a structure gives a well-balanced fi.nished yarn and eli.minates ~he ri.sks of the core l kinking when this is only associated to one wrapping yarn.
In certain cases, it may be recommended to use an internal wrappi.ng yarn 4, which has the same material as the external wrapping yarn 2.
In certai.n cases also, the i.nternal wrappi.ng yarn 4 can be associated to a thermo-adhesi.ve substance deposited as indi.cated herei.nabove, ei.ther at the level of the coils 5 prior to the wi.nding of the external wrapping yarn 2, or else by pri.or coating of the yarn 4. In such a case, the relative pressurizing at a given temperature and for a predetermined period between the yarn and the support enables the contact points between the latter to be multi.pli.ed and also joi.ns the coi.ls 3 and 5 together at their points of i.ntersecti.on.
Fi.gure 3 shows a further embodi.ment wherei.n the yarn compri.ses an elasti.c strand la, shown in the drawi.ng as bei.ng of ci.rcular cross-secti.on. It must be understood that any other cross-secti.on is also suitable. The strand la, which plays the part of the core l i.n the foregoi.ng examples, i.s associ.ated wi.th a second strand 6 whi.ch can have the same composition as the wrapping yarns 2 and 4 and be likewi.se previously coated with 1 ~ ~21 1 ~
the thermo-adhesi.ve substance.
The strand 6 and the strand la are combi.ned by twi.sting and throwing when the elastic strand la is stretched. The resulting comb;.nati.on is constituted, when the strand la ;.s slackened off, by a succession of adjacent coils 7 and 8 of the elasti.c strand la and the strand 6 in alternate succession.
The aforesaid yarn i.s used as previously indicated by stretching the combination so as to separate the different successive coi.ls 7 and 8. The combi.nation thus stretched is then placed on a support as previ.ously i.ndi.cated, pressure and heat bei.ng appli.ed for a speci.fi.c period of time. This softens the thermo-adhesive substance, at least where coils 8 are in contact wi.th the support. The result i.s an assembly by successive points of adhesi.on, whi.ch poi.nts become further spaced apart from one another as the stretchi.ng force i.s increased.
Fi.gure 4 i.llustrates another embodi.ment of the elasti.c yarn according to the invention wherein the yarn compri.ses an elastic strand lb whi.ch can be compared to the core 1. The strand lb i.s stretched and combined wi.th a strand 9 whi.ch is kni.tted to form successive sti.tches whi.ch are pulled when the yarn is stretched as shown in the drawi.ng. The strand 9 can be a si.ngle-fi.lament or a multi.-fi.lament, as aforedescribed, and is coated, at least locally, with the thermo-adhesive substance preferably before bei.ng kni.tted around the elastic strand lb.
l i 6~115 The resulti.ng pulled state of the combi.nati.on i.s i.llustrated i.n Figure 4 to show that: i.n the yarn obtai.ned, there is for each sti.tch, laterally to the strand lb, on the one hand one 1OGP and on the other hand two, and that the lateral distribution of these loops is reversed from one stitch to the next. The different loops represent, after the aforesaid application, joining points between the support and the combi.nati.on via the thermo-adhesi.ve substance.
In the foregoi.ng, i.t is i.ndicated that the yarn is pulled and then applied to a support. Thi.s joi.ni.ng method can, i.t i.s true, be used over the enti.re length of a segment of yarn which i.s to be enti.rely applied to a support, or over only part of the length of such a segment whi.ch i.s also requi.red to form a joi.ning element, such as a bar, loop, etc...
The inventi.on is in no way li.mited to the descri.ption gi.ven hereinabove and on the contrary covers any modificati.ons whi.ch can be made thereto wi.thout departing from the scope thereof.
Claims (14)
OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. Thermo-adhesive elastic yarn assigned to be applied and attached to a backing and comprising an elongate elastic element associated with at least one second elongate element and forming with said second elongate element an elastically stretchable combination, said second elongate element being adapted to be at least partly moved relatively to the first elongate element and said second element being coated a thermo-adhesive substance at least at spaced locations along said second elongate element.
2. Thermo-adhesive elastic yarn as claimed in claim 1, wherein said thermo-adhesive substance is a resin.
3. Thermo-adhesive elastic yarn as claimed in claim 2, wherein said resin comprises an ethylene/vinyl acetate/organic acids terpolymer.
4. Thermo-adhesive elastic yarn as claimed in claim 1, 2 or 3, wherein said thermo-adhesive substance is deposited by coating over.
5. Thermo-adhesive elastic yarn as claimed in claim 1, wherein said second elongate element is mono-filamentary.
6. Thermo-adhesive elastic yarn as claimed in claim 1, wherein said second elongate element is multi?ilamentary.
7. Thermo-adhesive elastic yarn as claimed in claim 1, wherein said elongate elastic element comprises an elastic core and said second elongate element comprises an external wrapping yarn wound into coils.
8. Thermo-adhesive elastic yarn as claimed in claim 7, wherein said elongate elastic element comprises an elastic core, said elongate second element comprises a first wrapping yarn wound into coils around said core and a second wrapping yarn is wound into coils around said first wrapping yarn and said coil in a winding direction which is reverse to that of said first wrapping yarn, said second winding yarn being coated with a thermo-adhesive substance at least at locations spaced apart along said second wrapping yarn.
9. Thermo-adhesive elastic yarn as claimed in claim 1, wherein said elongate elastic element and said second elongate element are twisted together.
10. Thermo-adhesive elastic yarn as claimed in claim 1, wherein said second elongate element is knitted around said elastic elongate element to form successive stitches.
11. Thermo-adhesive yarn as claimed in claim 1, wherein said yarn is stretched and thermo-adhesively applied to said backing to form gatherings therein once the tension is released.
12. Thermo-adhesive elastic yarn as claimed in claim 1, 2 or 3, forming part of an article of clothing.
13. Thermo-adhesive elastic yarn as claimed in claim 1, or 3, forming part of an article of household linen.
14. A support comprising at least one extensible portion provided with a thermo-adhesive yarn as claimed in claim 1, 2 or 3.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8000634A FR2446477A1 (en) | 1979-01-12 | 1980-01-11 | METHOD AND APPARATUS FOR DETERMINING THE NATURE OF MATERIALS CARRIED BY MEASURING TRANSMITTED RADIATIONS |
| FR80-22-634 | 1980-10-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1162115A true CA1162115A (en) | 1984-02-14 |
Family
ID=9237473
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000388197A Expired CA1162115A (en) | 1980-01-11 | 1981-10-19 | Thermo-adhesive elastic yarn |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1162115A (en) |
-
1981
- 1981-10-19 CA CA000388197A patent/CA1162115A/en not_active Expired
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