CA2055597A1 - Appliance for the thermal bonding of absorbent pads to articles of hygiene for the absorption of body fluid - Google Patents
Appliance for the thermal bonding of absorbent pads to articles of hygiene for the absorption of body fluidInfo
- Publication number
- CA2055597A1 CA2055597A1 CA 2055597 CA2055597A CA2055597A1 CA 2055597 A1 CA2055597 A1 CA 2055597A1 CA 2055597 CA2055597 CA 2055597 CA 2055597 A CA2055597 A CA 2055597A CA 2055597 A1 CA2055597 A1 CA 2055597A1
- Authority
- CA
- Canada
- Prior art keywords
- roller
- heating cylinder
- appliance
- absorbent pads
- heating
- 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.)
- Abandoned
Links
- 239000002250 absorbent Substances 0.000 title claims abstract description 41
- 230000002745 absorbent Effects 0.000 title claims abstract description 39
- 210000001124 body fluid Anatomy 0.000 title claims description 4
- 239000010839 body fluid Substances 0.000 title claims description 4
- 238000010521 absorption reaction Methods 0.000 title claims description 3
- 238000010438 heat treatment Methods 0.000 claims abstract description 42
- 238000003490 calendering Methods 0.000 claims abstract description 15
- 239000000463 material Substances 0.000 claims abstract description 13
- 238000003825 pressing Methods 0.000 claims abstract description 12
- 238000004049 embossing Methods 0.000 claims abstract description 7
- 238000009499 grossing Methods 0.000 claims abstract description 7
- 125000006850 spacer group Chemical group 0.000 claims description 5
- 238000004140 cleaning Methods 0.000 claims description 4
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 241001484259 Lacuna Species 0.000 claims 4
- 239000004744 fabric Substances 0.000 claims 1
- 229920000642 polymer Polymers 0.000 claims 1
- 239000000843 powder Substances 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 description 5
- 229920003023 plastic Polymers 0.000 description 2
- 239000002985 plastic film Substances 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- BTFMCMVEUCGQDX-UHFFFAOYSA-N 1-[10-[3-[4-(2-hydroxyethyl)-1-piperidinyl]propyl]-2-phenothiazinyl]ethanone Chemical compound C12=CC(C(=O)C)=CC=C2SC2=CC=CC=C2N1CCCN1CCC(CCO)CC1 BTFMCMVEUCGQDX-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000012790 adhesive layer Substances 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229960004265 piperacetazine Drugs 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/14—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
- B32B37/144—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers using layers with different mechanical or chemical conditions or properties, e.g. layers with different thermal shrinkage, layers under tension during bonding
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F13/00—Bandages or dressings; Absorbent pads
- A61F13/15—Absorbent pads, e.g. sanitary towels, swabs or tampons for external or internal application to the body; Supporting or fastening means therefor; Tampon applicators
- A61F13/15577—Apparatus or processes for manufacturing
- A61F13/15707—Mechanical treatment, e.g. notching, twisting, compressing, shaping
- A61F13/15731—Treating webs, e.g. for giving them a fibrelike appearance, e.g. by embossing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C59/00—Surface shaping of articles, e.g. embossing; Apparatus therefor
- B29C59/02—Surface shaping of articles, e.g. embossing; Apparatus therefor by mechanical means, e.g. pressing
- B29C59/04—Surface shaping of articles, e.g. embossing; Apparatus therefor by mechanical means, e.g. pressing using rollers or endless belts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2555/00—Personal care
- B32B2555/02—Diapers or napkins
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Vascular Medicine (AREA)
- Manufacturing & Machinery (AREA)
- Animal Behavior & Ethology (AREA)
- Epidemiology (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Treatment Of Fiber Materials (AREA)
- Laminated Bodies (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
- Absorbent Articles And Supports Therefor (AREA)
- Making Paper Articles (AREA)
Abstract
Abstract A thermal bonding appliance (10) combined with a calendering, smoothing and/or embossing roller pressing appliance (20) and intended for the treatment of absorbent pads on articles of hygiene consists of a pressure band (A) which rotates endlessly via a heating cylinder (11) and rollers (17,16,15,14,13,12) back to the heating cylinder (11) and which partially loops adjustably around the circumference of the heating cylinder, the absorbent pads, individually lying freely or joined in sheet form and each covered on one side and/or on both sides with a covering sheet, being guided between the looped-round surface of the heating cylinder (11) and the pressure band (A). For the perfect introduction and fault-free run-through of the absorbent pads to be bonded, even at very high working speeds, there is a laying-down device (40) for an endlessly rotating filamentary material (44), preferably a wire rope, laid at a mutual distance over the sheet width, the absorbent pads (F,F') predominantly being guided between the wire-rope laying-down device (40) and the pressure band (A). A
press roller (21) of the calendering, smoothing and embossing roller pressing appliance (20) so interacts with the heating cylinder (11) outside the looped-round region of the pressure band that the heating cylinder (11) is additionally a calendering roller.
(Figure 1)
press roller (21) of the calendering, smoothing and embossing roller pressing appliance (20) so interacts with the heating cylinder (11) outside the looped-round region of the pressure band that the heating cylinder (11) is additionally a calendering roller.
(Figure 1)
Description
Appliance for the thermal bonding of absorbent pads to articles of hygiene for the absorption of body fluid The invention relates to an appliance for the thermal bonding of absorbent pads according to the precharacterising clause of Patent Claim 1.
A thermal bonding appliance of this type, a so-called thermobonding apparatus, which oan be inserted into an already existing production system working continuously and which is intended for absorbent pads treated with an absorbent agent and employs a hot-air throughflow principle is known. The alternating air throughflow heats, on two perforated drums, both sides of the absorbent pads joined in sheet form and, if appropriate, covered on both sides with covering sheets. The cellulose/synthetic pulp mixture is thermally bonded, a superabsorber being fixed at predetermined points of the absorbent pads.
An appliance of this type is not suitable for the thermal bonding of individual freely lying absorbent pads conveyed at a distance behind and/or next to one another or of those which are covered with a covering sheet on one side only.
Another disadvantage, particularly with regard to multilayer absorbent pads, is the reduced run-through speed, the result of this being that the production capacity of the entire continuously working production system is impaired.
DE-B-1,296,363, for example, relates to a process for the adhesive bonding of a paper sheet to a flexible, tough, transparent plastic film. In this, one or more paper sheets are coated with a film of this type either on one side or on both sides, specifically with the use of a special adhesive layer under the effec~ of heat. The sheets to be coated run through between a guide roller with a relatively larger diameter, ~o that the thermoplastic adhesive covering of the plastic film covered with radiation-absorbing separating sheets i5 subjected to less bending stress, ~ - 2 ~ ~ 3~ J1 and a conveyor band. An intensive radiation energy, for example from infrared radiation, is brought to bear from the side of the radiation-ahsorbing sheet for the purpose of activating the adhe5ive. No heating and/or S calendering rollers are ~sed, and there is also no filamentary laying-down device for achieving an improved absorbency and further transport of the absorbent pads.
With regard to absorbent pads on articles of hygiene which subsequently also have to be calendered, smoothed or em~ossed, there follows as a separate device an additional pressing appliance, for example a pair of double rollers.
The object on which the present invention is based is, therefore, to provide a thermal bonding appliance, in which not only shaped absorbent pads joined in sheet form and covered on both sides, but also especially indi~idual freely lying absorbent pads equipped with a covering sheet on one side c~n be thermally bonded, even at very high run-through speeds, and a fault-free introduction and smooth run-through are guaranteed, even where multilayer absorbent pads are concerned, whilst at the same time a possibly necessary calendering, smoothing and/or embossing roller pressing applianc~ will b~ substantially sLmplified.
According to the invention, this object is achieved by means of the feature~ indicated in ~he characterising clause of ClaLm 1, whilst the remaining claims relate to advantageous further embodiments of the appliance.
The individual absorbent pads laid down freely between the pressure band and heating cylinder or additionally eguipped on one side or both sides with covering sheets, preferably nonwoven sheets, can be bonded in a similar way to the bonding appliance~
according to W0/13278, in that the layin~-down device is put out of operation, the press roller is lifted off from the heating cylinder and the absorbent pad^~ are ;, .
: :
'' ' ~ :.
. .
_ 3 - 2 ~ ~ 3~ 7 transported to the next production station via the defecting roller preceding the press roller.
According to a further development in relation to the thermal bonding appliance described in WO
90/13278, a laying-down device formed from endlessly rotating filamentary material, preferably a wire rope, guarantees a perfect introduction and fault-free run-through of the absorbent pads to be bonded, even at ~ery high working speeds.
The absorbent pads to be bonded are taken up be~ween the endless wire-rope laying-down device guided on the heating cylinder and the pressure band, the groove-shaped impression of the l~ying-down device on the side of the absor~ent pads facing the heating cylinder affording an improved absorbency and also making the further transport of the absorbent pads easier, especially where absorbent pads of multilayer construction are concerned.
Because the groove-shaped impression of the laying-down device extends in the longitudinal direc~ion of the absorbent pads, for example as regards a napkin it becomes appreciably more difficult for body fluid to escape laterally.
It is also advantageous that the superabsorber already introduced into the absorbent pads is retained between two respective depressions (grooves) of the laying-down device which are Lmpressed at a distance from one another, so that an accumulation of the superabsorber which blocks gel formation, so-called ~block gelling", is largely prevented.
A further essential advantage arises with regard to article~ of hygiene which, after the thermal bonding, also subsequently have to be calendered, smoothed or embossed, in that the corresponding pres~ing appliance is integrated into the bonding appliance. The heatable press roller i3 adjustable under pressure relative to the heating ~ylinder in the region free of the pressure ~and and together with the heating cylinder forms a pair of calendering, smoothing `' ~ ' ` ,', ' ~ " , ' ;.,.~ , :' ' ~ ",; ' i ' , '`
4 ~
or embossing rollers. Because there is no need for an additional pressing appliance, in addition to a saving of space the heat losses are reduced substantially.
If smooth surfaces of the thermally bonded and s calendered absorbent pads are to be achieved, the press roller is equipped over the sheet width with spacer groo~es for the filamentary material, so that, for example, the wire-rope laying-down device is aligned with the surface of the press roller.
An exemplary embodiment of the arrangement according to the invention of the thermal bonding appliance combined with a pre~sing appliance is illustrated in the drawing. `
In a diagrammatic drawing:
Figure 1 shows a side view from the right of a ~-bonding and pressing appliance, Figure 2 shows a side view from the left of the appliance according to Figure 1 with the corresponding drives, and Figure 3 shows a diagrammatic perspective representation according to Figure 1 with the laying-down device.
According to Figures l and 2, the thermal bonding appliance 10 according to t:he invention consists of a double-walled heating cylinder 11, in which, for example, hot oil circulcltes as a heating medium. Looped partially round the lower half of the heating cylinder 11 i~ a pressure band A which is guided via deflecting rollers 17,16, a tensionable `~
deflecting roller 15, further deflecting rollers 14,13 and a deflecting heating roller 12 back to the heating cylinder 11.
The deflecting roller 14 and the tensionable deflecting roller 15 are mounted on a tensioning frame 31 of a pressure-band control 30. The tensioning frame 31 is supported movably on a bearing point 36 arranged in the longitudinal direction. By means of a band control 34, the tension and parallel run of the pressure band A are monitored and deviations are .
,~ i :
. , .
:: : .
~ 5 ~
compensated via a pulse transmitter 35 and parallel regulating devices 32(32') and band-tension regulating devices 33(33~) of the tensioning frame 31. The thermal bonding appliance 10 is combinsd with a calendering, smoothing and/or embossing roller pressing appliance 20, the contact pressure of a heat~ble press roller 21 being adjustable relative to the heating cylinder 11 by means of a nip setting 27. The press roller 21 is fastened to one end of a two-armed lever 23 by means of a mounting 22, and a plston/cylinder unit 25,26 arranged on the frame 59 by means of a bracket 28 acts on the end of the two-armed lever 23 opposite the press roller 21. If articles of hygiene which do not have to be calendered, smoothed or embossed are being produced, the press roller 21 is lifted off from the heating cylinder 11 as a result of the actuation of the piston/
cylinder unit 25,26, so that the press rollex 21 merely performs the function of a deflecting roller for a filamentary laying-down material, preferably a wire-rope laying-down devicej as descri~ed further below. ::
To make it easier to introcluce the indi~idual ~.
~reely lying absorbent pads and to guarantee a perfect run through the thermal bonding appliance 10 combined with the pressing appliance 20, even at very high :~
working speed~, according to Figures 1 and 3 there is a laying-down device 40 which pays out an endless filamentary material and which lays the ~ndlessly connec~ed material, such as filament yarn, endless rope, continuous ribbon and the like, preferably wire .rope 44, into spacer grooves 45. The laying~down device 40 con~ist of a guide roller 41 and of a guida/tension roller 42 which are both grooved and the latter of which is connected to a piston rod 47 of a pneumatic piston~cylinder unit (46,47) in order to tension said laying-down device 40. By means of two guide roll~
43,43' lLmiting the laying-down width, the endless wire rope 44 is guided via the spacer grooves 45 of the guide~tension roller 42, the likewise grooved guide . . .
' I ! :
:, , . : ' ` ~ . ' ~ . :
., . ' ', , ,` ' ' ' ' ' ~ ~¢~ 3 roller 41 and th-e deflecting/heatin~ roller 12 directly via the hea-ting cylinder 11 and the press roller 21 back to the quide/tension roller 42, so that the non-bonded absorbent pads F are taken up between the pressure band A and the wire-rope laying-down device 44 guided via the heating cylinder 11, whilst the absorbent pads F' thermally bonded or additionally also calendered, smoothed or embossed by the press roller 21 are transported to the following production station via the press roller 21.
The pattern 44 of the wire laying-down device (longitudinally groove--shap-ed depressions) impressed in the surface of the bonded absorbent pad F' achieves an improved absorbency and, especially where multilayer absorbent pads are concerned, a cohesion, advantageous for further processing, of the thermally bonded absorbent pads F', if appropriate also pressed by the press roller 21. To guarantee a perfect separation of th-e absorbent pads from the wire laying-down device 40, a comb-shaped separating strip (not show¢n) is arranged immediately after the press roller 21 in the direction of run.
The heating cylinder 11 is cleaned continuously by m¢eans of a cleaning brush 51 arxanged in a box 52 and belonging to a brush device 50, and the brush 51 can he raised and lowered vertically relative to the heating cylinder 11 in guides 53 via a lifting device S4. ~ suction fan 58 with a filter (not shown) Xnown per se i~ ¢rranged above the thermal bonding appliance 10 combined with the pre~sing appliance 20. The filter consists of unrolling and rolling-up devices arrang-ed on both sides of the appliance 10 for a textile filter web, the filt¢r web being unrolled from one side and rolled up on the other side and air cleaned in this way being fed back into the air circuit of the appliance.
The entir¢- thermal bonding appliance 10 combined with the pressing appliance 20 is encased in a thermal insulation 57 partially indicated, in order to keap heat losse~ low.
J
~ ~.
7 - 2 ~3 ~
-According to Figure 2, the drive 60 of the thermal bsnding appliance 10 and of the presslng appliance 20 takes place by means of a flat belt, preferably made of plastic, via a driving roller 61 coupled to a drive unit, preferably an electrical drive unit, a tensioning/deflecting roller 62, a deflecting roller 63, a belt pulley 64 and a belt pulley 66 of the heating cylinder 11, a belt pulley 65 driving the press roller 21 synchronously from the belt pulley 64 by means of a toothed belt D. The brush 51 of the cleaning device 50 is likewise driven by an electric motor 55 via a multiple round belt E. V-belts and/or toothed belts could also be used instead of the round belts E
and the flat belt C.
The combined thermal bonding and pressing appliance 10,20 is not restricted to absorbent pads for articles of hygiene; thus, absorbent pads containing superabsorbar material covered on both sides could also be produced as a protective device against the effects of water.
~: "
,
A thermal bonding appliance of this type, a so-called thermobonding apparatus, which oan be inserted into an already existing production system working continuously and which is intended for absorbent pads treated with an absorbent agent and employs a hot-air throughflow principle is known. The alternating air throughflow heats, on two perforated drums, both sides of the absorbent pads joined in sheet form and, if appropriate, covered on both sides with covering sheets. The cellulose/synthetic pulp mixture is thermally bonded, a superabsorber being fixed at predetermined points of the absorbent pads.
An appliance of this type is not suitable for the thermal bonding of individual freely lying absorbent pads conveyed at a distance behind and/or next to one another or of those which are covered with a covering sheet on one side only.
Another disadvantage, particularly with regard to multilayer absorbent pads, is the reduced run-through speed, the result of this being that the production capacity of the entire continuously working production system is impaired.
DE-B-1,296,363, for example, relates to a process for the adhesive bonding of a paper sheet to a flexible, tough, transparent plastic film. In this, one or more paper sheets are coated with a film of this type either on one side or on both sides, specifically with the use of a special adhesive layer under the effec~ of heat. The sheets to be coated run through between a guide roller with a relatively larger diameter, ~o that the thermoplastic adhesive covering of the plastic film covered with radiation-absorbing separating sheets i5 subjected to less bending stress, ~ - 2 ~ ~ 3~ J1 and a conveyor band. An intensive radiation energy, for example from infrared radiation, is brought to bear from the side of the radiation-ahsorbing sheet for the purpose of activating the adhe5ive. No heating and/or S calendering rollers are ~sed, and there is also no filamentary laying-down device for achieving an improved absorbency and further transport of the absorbent pads.
With regard to absorbent pads on articles of hygiene which subsequently also have to be calendered, smoothed or em~ossed, there follows as a separate device an additional pressing appliance, for example a pair of double rollers.
The object on which the present invention is based is, therefore, to provide a thermal bonding appliance, in which not only shaped absorbent pads joined in sheet form and covered on both sides, but also especially indi~idual freely lying absorbent pads equipped with a covering sheet on one side c~n be thermally bonded, even at very high run-through speeds, and a fault-free introduction and smooth run-through are guaranteed, even where multilayer absorbent pads are concerned, whilst at the same time a possibly necessary calendering, smoothing and/or embossing roller pressing applianc~ will b~ substantially sLmplified.
According to the invention, this object is achieved by means of the feature~ indicated in ~he characterising clause of ClaLm 1, whilst the remaining claims relate to advantageous further embodiments of the appliance.
The individual absorbent pads laid down freely between the pressure band and heating cylinder or additionally eguipped on one side or both sides with covering sheets, preferably nonwoven sheets, can be bonded in a similar way to the bonding appliance~
according to W0/13278, in that the layin~-down device is put out of operation, the press roller is lifted off from the heating cylinder and the absorbent pad^~ are ;, .
: :
'' ' ~ :.
. .
_ 3 - 2 ~ ~ 3~ 7 transported to the next production station via the defecting roller preceding the press roller.
According to a further development in relation to the thermal bonding appliance described in WO
90/13278, a laying-down device formed from endlessly rotating filamentary material, preferably a wire rope, guarantees a perfect introduction and fault-free run-through of the absorbent pads to be bonded, even at ~ery high working speeds.
The absorbent pads to be bonded are taken up be~ween the endless wire-rope laying-down device guided on the heating cylinder and the pressure band, the groove-shaped impression of the l~ying-down device on the side of the absor~ent pads facing the heating cylinder affording an improved absorbency and also making the further transport of the absorbent pads easier, especially where absorbent pads of multilayer construction are concerned.
Because the groove-shaped impression of the laying-down device extends in the longitudinal direc~ion of the absorbent pads, for example as regards a napkin it becomes appreciably more difficult for body fluid to escape laterally.
It is also advantageous that the superabsorber already introduced into the absorbent pads is retained between two respective depressions (grooves) of the laying-down device which are Lmpressed at a distance from one another, so that an accumulation of the superabsorber which blocks gel formation, so-called ~block gelling", is largely prevented.
A further essential advantage arises with regard to article~ of hygiene which, after the thermal bonding, also subsequently have to be calendered, smoothed or embossed, in that the corresponding pres~ing appliance is integrated into the bonding appliance. The heatable press roller i3 adjustable under pressure relative to the heating ~ylinder in the region free of the pressure ~and and together with the heating cylinder forms a pair of calendering, smoothing `' ~ ' ` ,', ' ~ " , ' ;.,.~ , :' ' ~ ",; ' i ' , '`
4 ~
or embossing rollers. Because there is no need for an additional pressing appliance, in addition to a saving of space the heat losses are reduced substantially.
If smooth surfaces of the thermally bonded and s calendered absorbent pads are to be achieved, the press roller is equipped over the sheet width with spacer groo~es for the filamentary material, so that, for example, the wire-rope laying-down device is aligned with the surface of the press roller.
An exemplary embodiment of the arrangement according to the invention of the thermal bonding appliance combined with a pre~sing appliance is illustrated in the drawing. `
In a diagrammatic drawing:
Figure 1 shows a side view from the right of a ~-bonding and pressing appliance, Figure 2 shows a side view from the left of the appliance according to Figure 1 with the corresponding drives, and Figure 3 shows a diagrammatic perspective representation according to Figure 1 with the laying-down device.
According to Figures l and 2, the thermal bonding appliance 10 according to t:he invention consists of a double-walled heating cylinder 11, in which, for example, hot oil circulcltes as a heating medium. Looped partially round the lower half of the heating cylinder 11 i~ a pressure band A which is guided via deflecting rollers 17,16, a tensionable `~
deflecting roller 15, further deflecting rollers 14,13 and a deflecting heating roller 12 back to the heating cylinder 11.
The deflecting roller 14 and the tensionable deflecting roller 15 are mounted on a tensioning frame 31 of a pressure-band control 30. The tensioning frame 31 is supported movably on a bearing point 36 arranged in the longitudinal direction. By means of a band control 34, the tension and parallel run of the pressure band A are monitored and deviations are .
,~ i :
. , .
:: : .
~ 5 ~
compensated via a pulse transmitter 35 and parallel regulating devices 32(32') and band-tension regulating devices 33(33~) of the tensioning frame 31. The thermal bonding appliance 10 is combinsd with a calendering, smoothing and/or embossing roller pressing appliance 20, the contact pressure of a heat~ble press roller 21 being adjustable relative to the heating cylinder 11 by means of a nip setting 27. The press roller 21 is fastened to one end of a two-armed lever 23 by means of a mounting 22, and a plston/cylinder unit 25,26 arranged on the frame 59 by means of a bracket 28 acts on the end of the two-armed lever 23 opposite the press roller 21. If articles of hygiene which do not have to be calendered, smoothed or embossed are being produced, the press roller 21 is lifted off from the heating cylinder 11 as a result of the actuation of the piston/
cylinder unit 25,26, so that the press rollex 21 merely performs the function of a deflecting roller for a filamentary laying-down material, preferably a wire-rope laying-down devicej as descri~ed further below. ::
To make it easier to introcluce the indi~idual ~.
~reely lying absorbent pads and to guarantee a perfect run through the thermal bonding appliance 10 combined with the pressing appliance 20, even at very high :~
working speed~, according to Figures 1 and 3 there is a laying-down device 40 which pays out an endless filamentary material and which lays the ~ndlessly connec~ed material, such as filament yarn, endless rope, continuous ribbon and the like, preferably wire .rope 44, into spacer grooves 45. The laying~down device 40 con~ist of a guide roller 41 and of a guida/tension roller 42 which are both grooved and the latter of which is connected to a piston rod 47 of a pneumatic piston~cylinder unit (46,47) in order to tension said laying-down device 40. By means of two guide roll~
43,43' lLmiting the laying-down width, the endless wire rope 44 is guided via the spacer grooves 45 of the guide~tension roller 42, the likewise grooved guide . . .
' I ! :
:, , . : ' ` ~ . ' ~ . :
., . ' ', , ,` ' ' ' ' ' ~ ~¢~ 3 roller 41 and th-e deflecting/heatin~ roller 12 directly via the hea-ting cylinder 11 and the press roller 21 back to the quide/tension roller 42, so that the non-bonded absorbent pads F are taken up between the pressure band A and the wire-rope laying-down device 44 guided via the heating cylinder 11, whilst the absorbent pads F' thermally bonded or additionally also calendered, smoothed or embossed by the press roller 21 are transported to the following production station via the press roller 21.
The pattern 44 of the wire laying-down device (longitudinally groove--shap-ed depressions) impressed in the surface of the bonded absorbent pad F' achieves an improved absorbency and, especially where multilayer absorbent pads are concerned, a cohesion, advantageous for further processing, of the thermally bonded absorbent pads F', if appropriate also pressed by the press roller 21. To guarantee a perfect separation of th-e absorbent pads from the wire laying-down device 40, a comb-shaped separating strip (not show¢n) is arranged immediately after the press roller 21 in the direction of run.
The heating cylinder 11 is cleaned continuously by m¢eans of a cleaning brush 51 arxanged in a box 52 and belonging to a brush device 50, and the brush 51 can he raised and lowered vertically relative to the heating cylinder 11 in guides 53 via a lifting device S4. ~ suction fan 58 with a filter (not shown) Xnown per se i~ ¢rranged above the thermal bonding appliance 10 combined with the pre~sing appliance 20. The filter consists of unrolling and rolling-up devices arrang-ed on both sides of the appliance 10 for a textile filter web, the filt¢r web being unrolled from one side and rolled up on the other side and air cleaned in this way being fed back into the air circuit of the appliance.
The entir¢- thermal bonding appliance 10 combined with the pressing appliance 20 is encased in a thermal insulation 57 partially indicated, in order to keap heat losse~ low.
J
~ ~.
7 - 2 ~3 ~
-According to Figure 2, the drive 60 of the thermal bsnding appliance 10 and of the presslng appliance 20 takes place by means of a flat belt, preferably made of plastic, via a driving roller 61 coupled to a drive unit, preferably an electrical drive unit, a tensioning/deflecting roller 62, a deflecting roller 63, a belt pulley 64 and a belt pulley 66 of the heating cylinder 11, a belt pulley 65 driving the press roller 21 synchronously from the belt pulley 64 by means of a toothed belt D. The brush 51 of the cleaning device 50 is likewise driven by an electric motor 55 via a multiple round belt E. V-belts and/or toothed belts could also be used instead of the round belts E
and the flat belt C.
The combined thermal bonding and pressing appliance 10,20 is not restricted to absorbent pads for articles of hygiene; thus, absorbent pads containing superabsorbar material covered on both sides could also be produced as a protective device against the effects of water.
~: "
,
Claims (9)
1. Appliance for the mutual thermal bonding of one or more sides of a plurality of layers of material layers different from one another, preferably for bonding absorbent pads to articles of hygiene for the absorption of body fluids, especially for napkins, sanitary towels, pants inserts and the like, which are shaped to the body and which are pretreated with an absorbent agent, especially a superabsorber polymer powder, the various material layers being guided via heating cylinders and tensioning and deflecting rollers and via an advance device formed from bands or from porous fabric strips, characterised in that a rotating endless pressure band (A) is arranged via the heating cylinder (11) and the deflecting rollers (16, 17) and via a deflecting heating roller (15) and further deflecting rollers (13, 14). and via the deflecting roller (12) back via the heating cylinder (11), and the pressure band (A) partially loops round the circumference of the heating cylinder (11) with an adjustable tension, the absorbent pads individually lying freely and/or being joined in sheet form between the looped-round surface of the heating cylinder (11) and the pressure band, and a laying-down device (40) with endlessly rotating filamentary material (44) forming at a mutual distance over the sheet width the advance device and, if appropriate, for the bonded absorbent pads a press roller (21) interacting with the heating cylinder (11) and belonging to a calendering, smoothing and/or embossing roller pressing appliance (20) being provided, and in that the calendering, smoothing and/or embossing roller pressing appliance (20) is integrated into the thermal bonding appliance (10), in that the press roller (21) so interacts with the heating cylinder (11) outside the looped-round pressure band (A) that the heating cylinder (11) is additionally a calendering roller.
2. Appliance according to Claim 1, characterised in that the deflecting roller (14) and the tensioning/deflecting roller (15) are fastened to a tensioning frame (31) supported on a bearing point (36), and by means of a band control (34) and a pulse transmitter (35) the pressure band (A) is made adjustable by parallel regulating devices (32, 32') and tension-regulating devices (33, 33'),
3. Appliance according to Claim 1 or 2, characterised in that the press roller (21) arranged at one end of a two-armed lever (23) is designed so that, by means of a piston/cylinder unit (25, 26), it can be pressed against the heating cylinder (11) by means of a piston rod (25) via a [lacuna] onto the second end of the two-armed lever (23) rotatable in the bearing (24) and can be relieved of pressure, and in that a setting device (27) is provided for setting the nip between the heating cylinders (11) and the press roller (21).
4. Appliance according to one of Claims 1 to 3, characterised in that a hot-oil circulation line (56) is provided for heating the double-walled heating cylinder (11), the deflecting/heating roller (12) and the press roller (21).
5. Appliance according to one of Claims 1 to 4, characterised in that the laying-down device (40) for an endlessly rotating filamentary material (44) is provided as a run-through for the thermal bonding of the absorbent pads (F, F'), and in that this [lacuna]
of a guide roller (41), of a guide/tension roller (42) with spacer grooves (45) and of [lacuna] guide rolls (43, 43') are provided at the outer edges of the laying-down device, and [lacuna] is arranged on the guide/tension roller (42) via a pneumatic piston cylinder (46, 47).
of a guide roller (41), of a guide/tension roller (42) with spacer grooves (45) and of [lacuna] guide rolls (43, 43') are provided at the outer edges of the laying-down device, and [lacuna] is arranged on the guide/tension roller (42) via a pneumatic piston cylinder (46, 47).
6. Appliance according to Claim 5, characterised in that the paid-out endlessly rotating filamentary material (44) is guided via the first guide roll (43), the guide roller (41), the deflecting/tensioning roller (12), the heating cylinder (11), the press roller (21) and the guide/tension roller (42) to the second guide roll (43').
7. Appliance according to one of Claims 1 to 6, characterised in that the press roller (21) has spacer grooves (45) over the sheet width.
8. Appliance according to one of Claims 1 to 7, characterised in that the paid-out filamentary material (44) is formed from a filament yarn, endless rope or continuous ribbon, preferably from an endlessly connected wire rope.
9. Appliance according to one of Claims 1 to 8, characterised in that, for cleaning the heating cylinder (11), a raisable brush (51) driven by motor (55) via a multiple round belt (E) and belonging to a brush cleaning device (50) with a suction extractor (58) is arranged above the heating cylinder (11).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH1059/90-1 | 1990-04-01 | ||
| CH105990 | 1990-04-01 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2055597A1 true CA2055597A1 (en) | 1991-10-02 |
Family
ID=4201488
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2055597 Abandoned CA2055597A1 (en) | 1990-04-01 | 1991-03-21 | Appliance for the thermal bonding of absorbent pads to articles of hygiene for the absorption of body fluid |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP0474818A1 (en) |
| JP (1) | JPH04506492A (en) |
| AU (1) | AU7540691A (en) |
| CA (1) | CA2055597A1 (en) |
| WO (1) | WO1991015367A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09132847A (en) * | 1995-11-07 | 1997-05-20 | Unitika Ltd | Composite non-woven fabric and its production |
| US7198742B2 (en) | 2003-12-30 | 2007-04-03 | Kimberly-Clark Worldwide, Inc. | Apparatus and method for deforming sheet material |
| KR100679697B1 (en) | 2006-01-11 | 2007-02-06 | 전우진 | Embossing calendar for car interior fabric processing |
| CN118752558B (en) * | 2024-09-02 | 2025-01-21 | 烟台金蕊女性用品有限公司 | Die-cutting equipment for non-woven fabric layer and perforated film layer for sanitary pad processing |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB643078A (en) * | 1947-07-29 | 1950-09-15 | Int Cellucotton Products | Improvements in a method of cutting pads and rotary apparatus therefor |
| NL267657A (en) * | 1960-07-28 | 1900-01-01 | ||
| BR6456568D0 (en) * | 1963-02-23 | 1973-12-27 | Honshu Paper Co Ltd | PROCESS FOR THE MANUFACTURE OF PERFECTED FLUID ABSORBING MATERIAL AS WELL AS THE RESPECTIVE ABSORBENT MATERIAL |
| FR2086941A6 (en) * | 1970-04-14 | 1971-12-31 | Lemaire & Cie |
-
1991
- 1991-03-21 JP JP3506308A patent/JPH04506492A/en active Pending
- 1991-03-21 CA CA 2055597 patent/CA2055597A1/en not_active Abandoned
- 1991-03-21 WO PCT/EP1991/000549 patent/WO1991015367A1/en not_active Application Discontinuation
- 1991-03-21 AU AU75406/91A patent/AU7540691A/en not_active Abandoned
- 1991-03-21 EP EP19910906491 patent/EP0474818A1/en not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04506492A (en) | 1992-11-12 |
| AU7540691A (en) | 1991-10-30 |
| EP0474818A1 (en) | 1992-03-18 |
| WO1991015367A1 (en) | 1991-10-17 |
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