CN1136271A - Process for applying a foamed coating to a medical adhesive tape - Google Patents
Process for applying a foamed coating to a medical adhesive tape Download PDFInfo
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- CN1136271A CN1136271A CN94194342A CN94194342A CN1136271A CN 1136271 A CN1136271 A CN 1136271A CN 94194342 A CN94194342 A CN 94194342A CN 94194342 A CN94194342 A CN 94194342A CN 1136271 A CN1136271 A CN 1136271A
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- Prior art keywords
- foam
- substrate
- coating
- tape
- emulsion
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- 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
- A61F13/02—Adhesive plasters or dressings
- A61F13/0276—Apparatus or processes for manufacturing adhesive dressings or bandages
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/20—Adhesives in the form of films or foils characterised by their carriers
- C09J7/201—Adhesives in the form of films or foils characterised by their carriers characterised by the release coating composition on the carrier layer
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/20—Adhesives in the form of films or foils characterised by their carriers
- C09J7/21—Paper; Textile fabrics
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M23/00—Treatment of fibres, threads, yarns, fabrics or fibrous goods made from such materials, characterised by the process
- D06M23/04—Processes in which the treating agent is applied in the form of a foam
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/0043—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by their foraminous structure; Characteristics of the foamed layer or of cellular layers
- D06N3/0045—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by their foraminous structure; Characteristics of the foamed layer or of cellular layers obtained by applying a ready-made foam layer; obtained by compressing, crinkling or crushing a foam layer, e.g. Kaschierverfahren für Schaumschicht
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2301/00—Additional features of adhesives in the form of films or foils
- C09J2301/30—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier
- C09J2301/302—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier the adhesive being pressure-sensitive, i.e. tacky at temperatures inferior to 30°C
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2400/00—Presence of inorganic and organic materials
- C09J2400/20—Presence of organic materials
- C09J2400/26—Presence of textile or fabric
- C09J2400/263—Presence of textile or fabric in the substrate
Abstract
This invention generally relates to a process for applying a foamed coating to a web and particularly relates to a process for applying a foamed release coating to a porous, pressure sensitive adhesive medical tape backing. The disclosed process may be used, for example, to apply a thin, uniform release coating to a porous pressure sensitive tape and includes the steps of i) forming a porous tape backing having at least one surface from polymeric fibers, ii) forming a foam of a release coating, wherein the foam is prepared by mixing water, the desired coating, and a surfactant to give a foam composition that collapses immediately when the foam composition is applied to the porous tape backing, iii) applying the foam to at least one surface of the porous tape backing to give a coated tape backing, and iv) coating the tape backing with a pressure sensitive adhesive before or after the relase coating is applied. A related process to apply a foamed latex adhesive to an elastomeric tape backing is also disclosed.
Description
Technical background
Put it briefly, the present invention relates to a kind of method that on fabric, applies foamed coating, specifically, relate to a kind of method that on the substrate of porous pressure-sensitive medical adhesive tape, applies foamed coating.
The pressure sensitive adhesive tape that is used for goals of medicine has specific (special) requirements to the composition that is used to make these adhesive tapes.Specifically, the composition of forming adhesive tape must adapt with user,, must have biocompatibility that is.And, in use, adhesive and pigment transfer should not appear to user bad phenomenon on one's body.In brief, when pressure sensitive adhesive tape is used for goals of medicine, material and the method for making this class adhesive tape had harsh requirement.
Pressure sensitive adhesive tape generally has been coated with pressure-sensitive adhesive by a side or substrate surface and has made in polymeric film, paper, yarn fabric or on-woven tape substrate that the opposite side of substrate has a release coating.Release coating can make the tape substrate of applied mistake roll up bundle on himself, and prevents that the adhesive on the adhesive tape from shifting to adjacent bed from one deck of the adhesive tape that winds up.
Existing various release coatings are used to this specific purpose.So far, generally release coating is dissolved in the volatile organic solvent, makes mixture or solution, in all sorts of ways then and said mixture or solution are coated in a side or the surface of tape substrate.For example, be coated on the tape substrate with cylinder, dip-coating device, doctor knife coater or other applying device commonly used mixture or solution release coating and volatile solvent.
The problem that is caused by the mixture or the solution of release coating and volatile organic solvent has been accelerated the exploitation of water base release coating.
The method of the existing water base release coating of various coatings is in the news.For example, U.S. Patent No. 4,973,513 reports, available habitual coating process as wind the line rod control rubbing method, reverse roll rubbing method, airblade coating method, direct and indirect intaglio plate rubbing method, drag cutter rubbing method, the bonding rubbing method of impression or spraying process etc. that water base release coating is coated on the pressure sensitive adhesive tape.
U.S. Patent No. 5,089,296 reports can make the release coating foaming, are coated in then on paper and other ground.In this patent, foam breaks lentamente, and need add external force such as mechanical compress or vacuum so that its shrinkage.Report also in the literary composition is important to the control of foam shrinkage because when the foam shrinkage after, foam can rapid permeability and dipping surperficial.When by institute's reported method coating release coating, to stay on the surface of bottom material for guaranteeing release coating, release coating compositions should be not moistening fast.This patent points out that concerning coating process, quick disruptive foam is inapplicable, moves in the tape substrate because expect to have release coating.
Although there are many diverse ways release coating can be coated on the pressure-sensitive adhesive, Shang Weiyou is considered in any concrete application preferably unique method.And, do not report that as yet a kind of specific method can provide medical adhesive tape with required premium properties.Therefore, those of ordinary skill in the art faces a large amount of methods or technology and can be used for making medical adhesive tape but do not have a kind of known method can produce required premium properties as yet.In brief, have a kind of needs to following method: promptly a kind of release coating is coated to method on the medical adhesive tape, this method can be reliably and resemble expection a kind of good medical pressure-sensing adhesive tape is provided.
The general introduction of invention
The invention provides a kind of method that on the medical pressure-sensing adhesive tape, applies foamed coating.This method can be used for thin uniform coating, bottom sizing as release coating or low-adhesion is coated on the porous pressure sensitive adhesive tape substrate, and comprise the steps: 1) form porous tape substrate with at least one surface of making by polymer fiber, 2) allow aqueous emulsion form foam to obtain the foaming emulsion, wherein, foaming emulsion system passes through mixing water, aqueous emulsion and surfactant and prepare to obtain foam, when the foaming emulsion is applied on the tape substrate, the shrinkage immediately of described foam, 3) tape substrate and 4 to obtain being coated with is gone up on will foam at least one surface that emulsion is applied to tape substrate) with pressure-sensitive adhesive coated tape substrate.Suitable tape substrate comprises yarn fabric and adhesive-bonded fabric, contains the fabric of elastic fiber or fine line, and lamination or compound porous substrate.
According to the particular type of required pressure sensitive adhesive tape, the present invention also comprises a kind of before the coating release coating, the method for coating pressure-sensitive adhesive on tape substrate.In an example of this embodiment, this method comprises the steps: 1) form porous tape substrate with at least one surface of making by polymer fiber, 2) at least one surface of usefulness pressure-sensitive adhesive coated tape substrate, 3) allow release coating form foam to obtain composition, foam, wherein, foam system passes through mixing water, release coating and surfactant and prepare to obtain quick disruptive foam compositions, when foam compositions being applied on the porous tape substrate, foam compositions shrinkage immediately and 4) emulsion that will foam is applied on the surface of the porous tape substrate that contains pressure-sensitive adhesive to produce the pressure sensitive adhesive tape that was coated with.
When being applied to the bottom sizing of release coating or low-adhesion on the tape substrate with this method, its favourable part is, removes broken foamed coating without any need for external force.But also find, use quick disruptive foam can not cause that coating exceedingly moves in the porous tape substrate.Control excessively migration is even more important for medical adhesive tape, because the migration of coating is considered to cause the adhesive can not be fully attached on the tape substrate.If it is insufficient that adhesive adheres to, the adhesive residue will be stayed on one's body the patient.Therefore, this method can be used reliably than the simpler device of previous report and carry out, this method does not need crucial or complicated foam sprayed coating, spread-coating or the equipment that breaks, can reduce the requirement that is applied to the release coating on the substrate, eliminate the possibility of mechanical breakdown, make the throughput of tape substrate big, and can guarantee the suitable bonding of adhesive and tape substrate.In addition, this method can be used for producing the pressure sensitive adhesive tape that can meet the harshness requirement relevant with the medical pressure-sensing adhesive tape.Especially, this method provides the pressure sensitive adhesive tape that can be used for various medical applications.
In another embodiment of this method, can use the quick disruptive foam of natural rubber latex, with weaving or the elastic substrate of on-woven on thin, the coating uniformly of aqueous emulsion of coating natural rubber latex.This method method with coating release coating on tape substrate basically is identical, and difference is, uses porous elastic material as substrate.This method comprises the steps: 1) form and to have at least one surperficial poroelasticity substrate, 2) foam of the aqueous emulsion of formation natural rubber latex is to produce the foaming emulsion, wherein, foaming emulsion system prepares by mixing water, natural rubber latex and surfactant, to produce foam, when described foam is applied on the porous elastic substrate, foam is shrinkage immediately, 3) emulsion that will foam is applied to the two-sided of elastic substrate, to produce the substrate and 4 be coated with) substrate of drying coated mistake.
Brief description of drawings
Fig. 1 is the sketch map with the adhesive tape coating process of quick disruptive foam application to the tape substrate.Do not use any machinery or external force to remove broken quick disruptive foam.
Fig. 2 be with slow disruptive foam application to tape substrate, then on the surface of substrate with the sketch map of the adhesive tape coating process of the foam mechanical fragmentation of coating.
Fig. 3 is the sketch map that the foaming latex of natural rubber is applied to the adhesive tape coating process on the elastic substrate.
Fig. 4 is with antiseized foamed coating and changes the sketch map that colloid is applied to the adhesive tape coating process of adhesive tape (coating has been removed lining after changeing colloid).
The detailed description of invention
Method of the present invention easily is applicable to the typical method of making pressure sensitive adhesive tape.Some typical methods that are used to make pressure sensitive adhesive tape so far comprise the fabric that formation is made by fibrous material, and the fiber of fabric is bonded together with wet binding agent.Dry to produce tape substrate under the temperature that has raise then.Then, antitack agent is coated on the surface of tape substrate and the substrate that will be coated with dry again.At last, pressure-sensitive adhesive is coated on the uncoated surface of crossing antitack agent of of tape substrate dry again tape substrate.Then with adhesive tape coiled web-like.
Fig. 1-4 has described the device of implementing coating process.Fig. 1 is the sketch map of a kind of adhesive tape coating process of the present invention, and in the method, the quick disruptive foam of the bottom sizing emulsion of low-adhesion is applied on the tape substrate of the fabric of using the moistening mistake of binding agent.Substrate 10 is imported by on-woven manufacturing installation (not marking among the figure) and passes through between adhesive application roll 12 and 14.Binding agent system is by 11 coatings of feeding device 13 usefulness scraper plates.Substrate moves forward into foam coating section, applies quick disruptive foam 16 at this section from the foam die head.With the drying coated foamed coating 16 of baking oven 20.
Fig. 2 is the sketch map of known adhesive tape coating process, in the method, the slow disruptive foam of the bottom sizing emulsion of low-adhesion is applied on the tape substrate with the moistening mistake of Thermoadhesive binding agent, the foam of coating then on the surface of substrate by Mechanical Crushing.Substrate 22 is imported by on-woven manufacturing installation (not marking among the figure) and passes through between adhesive application roll 24 and 26.Binding agent system is by 27 coatings of feeding device 25 usefulness scraper plates.Substrate moves forward into the coating section, and at this section, from the slow disruptive foam 28 of foam die head 29 coatings, when the substrate that was coated with passed through under plastic knife tooth shape spread-coating machine 21, foam was broken.Substrate 28 with baking oven 20 drying coated mistakes.
Fig. 3 is the sketch map that the latex that will foam natural rubber of the present invention is applied to the adhesive tape coating process on the elastic substrate.Elastomeric yarn 36 passes through between pressure roller 38 and 40 then by importing by combing machine 35 for yarn winding drum 34, and like this, elastomeric yarn is placed in between feed roller 30A and the unfolded two-layer on-woven substrate 32 of 30B.Layer structure is passed through baking oven 52 with dry composite fabric 53 then by being transferred into the coating foamy foam die head 48 of natural rubber latex and 50 between cylinder 42 (cylinder 42 coatings are from the inadhering elastomeric adhesive of spreader 44) and the cylinder 46.The fabric 53 that then will be dried sent a pair of mip rolls 54 and 56, (baking oven 58 is as the U.S. Patent No. 3 of Hansen to send baking oven 58 again, 575,782 is described, have and carry out shirred and enough heats thermosetting), sent a pair of mip rolls 60 and 62 then, and coiled is rolled up under the help of wind-up roll 72.
Fig. 4 is that method shown in Figure 3 is used for the sketch map from the adhesive tape coating method of the foaming bottom sizing emulsion coating fabrics of the low-adhesion of foam die head 50, and after fabric 53 is by baking oven 52, will change stick and be coated on the fabric 53, peel off the lining that changes adhesive tape then.Commentaries on classics stick on the lining 66 is supplied with by cylinder 64, gained lamination thing 67 is sent to cylinder 68 between mip rolls 54 and 56, and peels off lining 70, simultaneously, makes fabric 59 by baking oven 58 and coiled volume.
The on-woven system that is used to make the porous tape substrate is by conventional process manufacturing known in the art, and these methods comprise wet coating process, dried coating process and air coating and combing method, direct coating process such as spunbond method and meltblown.The example of these methods is disclosed in the U.S. Patent No. 3,575,782 of the U.S. Patent No. 3,121,021 of Copeland and Hansen.In the method for the invention, also can use habitual adhesive-bonded fabric and other porous fabric.
Adhesive-bonded fabric is made by the synthetic or natural fiber of selecting by the desired properties of the fabric that generates.The example that is applicable to the textile fabric of substrate fabric comprises polyester, polyolefin, polyamide, artificial silk, Cotton Gossypii etc.Adhesive-bonded fabric also can mix and strengthen long filament such as polyester or shirred fabric such as LYCRA stretch yarn.
Should be with water-based adhesive coated fiber goods to obtain suitable tape substrate.The example of these binding agents comprises the latex that mixes polyacrylate, styrene/butadiene rubbers, vinyl acetate/ethylene, vinyl acetate/acrylate, polrvinyl chloride, polyvinyl alcohol, polyurethane and vinyl acetate.These binding agents are generally with the ratio of the 25-35% of solid weight, be coated on the fibre with any suitable coating process, these methods comprise the control of coiling rod rubbing method, reverse roll rubbing method, airblade coating method, direct and indirect intaglio plate rubbing method, drag cutter rubbing method, the bonding rubbing method of impression and spraying process.The binding agent of coating capacity concerning the technical staff in nonwoven webs manufacturing field, determines that the general consumption of various types of substrates is easily so that substrate has desired properties.For example, for same structure, apply more binding agent and can make the bigger material of intensity, usually, this material is also harder.
Behind the applying adhesive, and before the tape substrate drying or after tape substrate is dried, there is method of the present invention to apply water base release coating.Water base release coating comprises the combination of polyethylene, fluorine chemical, acrylate, polysiloxanes, ethylene copolymer and these polymer and other polymer.Release coating is preferably the bottom sizing of the low-adhesion that comprises poly-(dimethyl siloxane) and acrylate polymer.Admissible low-adhesion bottom sizing is disclosed in the United States Patent (USP) 4,728,571 of Clemens etc. for example.
Making the method for release coating foaming also is known in this area.In practice of the present invention, release coating should be mixed with anion or nonionic surfactant greater than about 0.5% (weight).Preferred surfactants is anionic surfactant such as TRITONGR-5M or nonionic surfactant such as TRITON X-100 (being Pennsylvania Rohm and Haas company product).The blowing ratio of foaming release coating generally is about 4-30.For making the release coating foaming, preferred blowing ratio is 20-30.For making the natural rubber latex foaming, preferred blowing ratio is 8-12.
Available customary way and device preparation are applicable to foam of the present invention.For example, the useful commercial change foaming agent such as LESS SUPERFOAMER foam device (Georgia State Latex Equipment Sales and Surface company) preparation foaming release coating or foaming natural rubber latex.The SUPERFOAMER device is especially convenient, depresses the equipment that expanded material is pumped directly to the foam die head because it has to add.The foam die head produces back-pressure and suitable foam transfer rate.
After making the foaming of release coating or rubber latex, expanded material is pumped to the foam die head, is applied on the tape substrate by die head then.The amount that is applied to the material on the tape substrate is by the pump rate controlled of material by die head.In the method, speed is decided to be with less than about 4.0 gram/rice
2The speed (recording) of dried release coating/tape substrate by the difference of the tape substrate of doing with the tape substrate of the coating of doing transmit thin coating.Preferred transfer rate is a 0.5-1.5 gram/rice
2With thin applying coating to the transfer rate on the tape substrate of anhydrous rubber latex is every approximately side 5-7 gram/rice
2
Except that foam is transferred to the tape substrate, the foam die head is also controlled the foamy uniformity across the coating of tape substrate width.Be particularly useful for adopting the foam drainage nozzle of describing in the U.S. Patent No. 4,655,056 of Zeiffer by the foam die head of die head coating uniform coating.The shape of this class die head is processed into exactly can transmit uniform foam stream at the width across tape substrate, and the weight percent distribution less than the edge-central authorities-edge of about ± 8% (weight) can be provided.Other type can the foam die head that foam transfers to tape substrate also be can be used for this method by this control mode.
Behind the coating release coating, with the tape substrate of any suitable drying coated mistake of drying mode.For example, habitual drying mode comprises contact drying method, circulating air oven process, flue oven process and ventilation oven process in the nonwoven webs field.Should be with tape substrate in about 145-155 ℃ cycling hot wind furnace dry about 1 minute.Thermal source should be placed in tape substrate and the same side release coating in the stove.Like this, the speed of the wicking of the release coating that is caused by fabric can not accelerated because of drying mark.When using production-scale equipment, behind the coating release coating, the tape substrate with release coating that wets should be sent into dry about 0.5-10 second in the drying oven.
At this moment, the tape substrate that was coated with can be removed adhesive coating for carrying thereafter on cylinder, or directly deliver to the adhesive coating machine, be cut into one tape roll then.Also but adhesive coating is as the commentaries on classics stick that is come by lining.
The pressure-sensitive adhesive that is applied on the on-woven tape substrate can be solvent based, water base or heat sealing adhesive.Suitable adhesive is as being that the adhesive of base is disclosed in the U.S. Patent No. 2,708,192 of Joesting etc. with the solidified rubber of phenol.The United States Patent (USP) RE No.24 of Ulrich discloses water base and solvent based adhesive in 906.Heat sealing adhesive is disclosed in the U.S. Patent No. 4,833,179 of Young etc. for example.
Surprisingly, observed already, and except that the part adjacent, had only the release coating of minute quantity to move in the tape substrate with coating part.In other words, release coating can not spread by tape substrate as to being coated in quick disruptive foam on the porous material expects.
After measuring the coating adhesive tape, stay lip-deep adhesive residue, confirm to have only the release coating of minute quantity to move into tape substrate.The test of suitable residue is described in the U.S. Patent No. 4,693,776 of Krampe etc.
In another embodiment of the present invention, the natural rubber latex of foaming is applied on the elastic rubber belt substrate.The method for making of poroelasticity substrate is well known in the art.For example, elastic, half adhesiveness binder has description in the U.S. Patent No. 4,984,584 of the U.S. Patent No. 3,575,782 of Hansen and Hansen etc.In brief, elastomeric yarn is bonded between the two layers of nonwoven fabric, has the substrate of good compression characteristic and caking property or self-adhesion ability with generation with natural rubber latex.
Provide following embodiment to further describe enforcement of the present invention.But these embodiment should not be understood that the present invention who is defined by the accompanying Claim book is worked the effect of qualification.
The preferred forms of invention
The foam of 1 pair of coating of embodiment uses the method for Mechanical Crushing
The device that uses Fig. 2 to schematically illustrate, by 80 parts of T-121 level polyester fibers (1.2 dawn (denier), 38 millimeters polyethylene terephthalate, New York Hoechst Celanese company product) and 20 part of 2 dawn, 38 millimeters type K-54 MELTY type binder fibre (core-sheath fiber that contains oriented polyester core and fusible polyester sheath, also be New York HoechstCelanese company product) admixture to make 30 yards (27.4 meters) long, 20 inches (50.8 centimetres) wide and 80: 20 thick polyethylene terephthalate of 3.5 mils (0.0889 centimetre): adhesive-bonded fabric, and manage machine (West Germany HergethHollingsworth GMBH company product) with the random sulfur of Hergeth and produce about 35 gram/rice with habitual adhesive-bonded fabric formation technology
2The adhesive-bonded fabric of basic weight.With hot calender machine mold pressing adhesive-bonded fabric, then, with containing the tape substrate that the solid acrylate of 25 weight %/vinyl acetate copolymer latex adhesive (New Jersey National Starch company product, trade name 78-6283) obtains on-woven.Handle moistening tape substrate with the foaming antitack agent.The vinyl siloxane copolymer bottom sizing that by acrylic acid methyl ester ./methacrylate/methacrylic acid/sulfydryl dimethyl siloxane is 20/50/10/30 water base low-adhesion (is pressed the U.S. Patent No. 5 of Kantner etc., 032, method makes described in 460) 2% (weight) aqueous solution, make foam with LESS foam device (model: SUPERFOAMER, Georgia State Latex Equipment Sales andService company product).The blade type system coating foam of the straight flange of the duroplasts thin plate that thick with 100 mils (2.54 millimeters), 4 inches (10.2 centimetres) are wide, 36 inches (91.4 centimetres) are long.The substrate of foam coverage sent into the speed of 15 feet per minutes (4.57 meters/minute) and the baking oven by 325-350 (163-177 ℃), and with dried substrate fabric on the core of 3 inches (7.6 centimetres).
Use the U.S. Patent No. 3 of Copeland then, 121,021 has made half wet laminating of general description, will be by the United States Patent (USP) RE No.24 of Ulrich, Isooctyl acrylate monomer/acrylic acid (95/5) polymer adhesive of the water base 40-44% (weight) that 905 described methods make is with 6.5 grains/24 inch
2(27 gram/rice
2) area density be coated on the whole width of above-mentioned substrate with coating to obtain medical adhesive tape.Then adhesive tape is cut into the roll that 1 inch (2.54 centimetres) are wide, 10 yards (9.1 meters) are long.
Above-mentioned roll is found through ripening under 120 (49 ℃), 90% relative humidity and launches easily after 2 days.Yet, not enough attached to the adhesive on the substrate that has applied, because when using above-mentioned medical adhesive tape, the adhesive residue can be stayed on the skin.Especially, when with the U.S. Patent No. 4 of pressing Riedel etc., the similar adhesive tape that the method for having made general description in 973,513 is made by spraying low-adhesion bottom sizing on substrate is compared, and the amount of the adhesive residue of above-mentioned adhesive tape is more than 2 times of similar adhesive tape.Attached to the minimizing of the adhesive on the substrate be since when with plastic blade on substrate surface during the Mechanical Crushing foam, due to the low-adhesion bottom sizing infiltration substrate.
Make another kind of tape substrate with the random carding machine of Hergeth by the artificial silk level fiber (1.5 dawn, 40 millimeters long, New York Courtaulds North America company product) of standard viscose glue processing, obtain about 22 gram/rice
2The on-woven substrate of basic weight.
Use device shown in Figure 2, the artificial silk substrate of about 50 yards (45.7 meters) is carried out wet process with the solid aqueous solution of 28% (weight) that contains of various binding agents, or handle also dry with containing the solid aqueous solution of 28% (weight), use 2% (weight) solution of the low-adhesion bottom sizing of the surfactant (0.5% (weight) TRITON GR-5M, Pennsylvania Rohm andHass company product) that contains interpolation to carry out the foam coating by above-mentioned steps then.Linear velocity is 15 feet per minutes (4.57 meters/minute), and oven temperature is 340 °F (171 ℃).With idler arm or scraper spread-coating.
Concrete processing conditions is shown in following table 1.After the adhesive tape shown in will showing coating and drying, again they were placed under 120 (49 ℃) and 90% relative humidity ripening 2 days.Press ASTM D-1000 method and measure the debatching rate (roll unwind) of the adhesive tape of ripening.The debatching rate is/2.54 centimetres of 450 grams, and this debatching rate is nonconforming.In addition, the adhesive adhesive rate of above-mentioned adhesive tape is measured, found that the adhesive residue has surpassed as the receptible level of medical adhesive tape.
Table 1
| Sample | The latex parameter | Foam maker | LAB solution | The LAB rubbing method | The spread-coating device | ||||||
| Binding agent | ?pH | Pump (rpm) | Plunger (rpm) | Air-flow (slm) | Air inlet (psi) | Back-pressure (psi) | Solid (%) | ???GR-5M ????(％) | |||
| ??1 | ??B-15H 1 | ?6.0 | Do not have | Free pulley | |||||||
| ??2 | ??B-15H | ?6.0 | ????15 | ????200 | ????2.9 | ????40 | ????6 | ??2 | ????0.5 | Wetting, it is dried to bump | Free pulley |
| ??3 | ??B-15H | ?6.0 | ????15 | ????250 | ????2.9 | ????40 | ????6 | ??2 | ????0.5 | Wetting, it is wet to bump | Free pulley |
| ??4 | ??B-15H | ?6.0 | ????15 | ????200 | ????2.2 | ????40 | ????6 | ??2 | ????0.5 | Wetting, it is wet to bump | Free pulley |
| ??5 | ??NS 2 | ?6.0 | Do not have | Free pulley | |||||||
| ??6 | ??NS | ?6.0 | ????15 | ????230 | ????2.2 | ????40 | ????6 | ??2 | ????0.5 | Wetting, it is wet to bump | Free pulley |
| ??7 | ??NS | ?6.0 | ????15 | ????230 | ????2.2 | ????40 | ????6 | ??2 | ????0.5 | Wetting, it is dried to bump | Free pulley |
| ??8 | ??NS | ?6.0 | ????15 | ????230 | ????3 | ????40 | ????6 | ??2 | ????0.5 | Wetting, it is dried to bump | Free pulley |
| ??9 | ??4402 3 | ?8.5 | Do not have | Free pulley | |||||||
| ??10 | ??4402 | ?8.5 | ????15 | ????230 | ????2.2 | ????40 | ????6 | ??2 | ????0.5 | Wetting, it is wet to bump | Free pulley |
| ??11 | ??4402 | ?8.5 | ????15 | ????230 | ????1.6 | ????40 | ????6 | ??2 | ????0.5 | Wetting, it is wet to bump | Free pulley |
| ??12 | ??4402 | ?8.5 | ????15 | ????230 | ????2.2 | ????40 | ????6 | ??2 | ????0.5 | Wetting, it is dried to bump | Free pulley |
| ??13 | ??4402 | ?8.5 | ????15 | ????230 | ????3 | ????40 | ????6 | ??2 | ????0.5 | Wetting, it is wet to bump | Scraper |
LAB-low-adhesion bottom sizing
1B15H is the binding agent that Pennsylvania Rohm and Haas company produces
2NS is the binding agent that the National Starch company of use among the embodiment 1 produces
3The 4402nd, the styrene/butadiene rubbers binding agent that Unical company in the North Carolina state produces,
Trade name is UC 4402
Rpm=rev/min
The slm=standard second/minute
Psi=pound/inch
2
Embodiment 2 foam anti-stick coating methods
Prepare medical adhesive tape by the method for having made general description in the foregoing description 1, but schematically illustrate as Fig. 1 ground with after foam application is to tape substrate, do not use mechanical means to remove fragmentation or spread-coating foam.More particularly, with the fiber production artificial silk substrate of the method described in the embodiment 1 by 1.5 dawn and 1-9/16 inch (3.97 centimetres) length.The basic weight of fabric is 20 gram/rice
2, wide about 12-14 inch (30.5-35.6 centimetre), cropped one-tenth 12 inches (30.5 centimetres) is wide.With the speed coated textiles of the various binding agents shown in the table 2 with 30-35 inch per minute (9.1-10.7 rice/minute), spreading rate is about 1 gram binding agent/1 gram fabric fibre, and the binding agent of use is the suspension of adhesive solids of pH7.5-8.5 26% (weight).Behind the coating adhesive, low-adhesion bottom sizing used among the embodiment 1 is coated with as foam with foam maker described in the embodiment 1 and the parabolic die head of 0.25 inch (0.635 centimetre) orifice of GastonCounty.The low-adhesion bottom sizing comprises the GR-5M surfactant of 1.25% (weight), and by the blowing ratio coating with 22: 1.
Concrete processing conditions is as shown in table 2.After the adhesive tape shown in will showing coating and drying, again they were placed under 120 (49 ℃) and 90% relative humidity ripening 2 days.Measure the debatching rate of the adhesive tape of ripening by the ASTM-1000 method.The debatching rate is less than/2.54 centimetres of 350 grams.In addition, the adhesive adhesive rate of adhesive tape shown in the his-and-hers watches is measured, and the value of finding to press the adhesive residue that method records described in the U.S. Patent No. 4,693,776 of Krampe etc. is less than 2.5.These data show, the medical adhesive tape that makes by method shown in the present embodiment is an acceptable for predetermined purposes.The substrate that has odd-numbered in the table 2 was used the U.S. Patent No. 3,121 of Copeland before being applied to the low-adhesion bottom sizing on the substrate with this method, method was coated with pressure-sensitive adhesive described in 021.
Table 2
| Sample | Binding agent | ????LAB | Priming paint | Yardage |
| ????1 | ????4402 | ????- | ??- | ???50 |
| ????2 | ????4402 | ????X | ??- | ??100 |
| ????3 | ????V-43 | ????- | ??- | ???50 |
| ????4 | ????V-43 | ????X | ??- | ??100 |
| ????5 | ????6283 | ????- | ??- | ???50 |
| ????6 | ????6283 | ????X | ??- | ??100 |
| ????7 | ????4260 | ????- | ??- | ???50 |
| ????8 | ????4260 | ????X | ??- | ??100 |
| ????9 | ???HP-2931 | ????- | ??- | ???50 |
| ????10 | ???HP-2931 | ????X | ??- | ??100 |
| ????11 | ????2833 | ????- | ??- | ???50 |
| ????12 | ????2833 | ????X | ??- | ??100 |
| ????13 | ????1715 | ????- | ??- | ???50 |
| ????14 | ????1715 | ????X | ??- | ??100 |
| ????15 | ????1845 | ????- | ??- | ???50 |
| ????16 | ????1845 | ????X | ??- | ??100 |
| ????17 | ????B15 | ????- | ??- | ???50 |
| ????18 | ????B15 | ????X | ??- | ??150 |
| ????19 | ????B15 | ????- | ??X | ???50 |
| ????20 | Substrate #18 | The one side that went up priming paint is uncoated | ??X | ???50 |
LAB: low-adhesion bottom sizing
Binding agent 4402 Rohm and Hass SBR 4402
V-43：????????B.F.Goodrich
6283：????????National?Starch?78-6283
4260：????????National?Starch?25-4260
HP-2931：?????Rohm?and?Hass
2833：???????????National?Starch?25-2833
1715：???????????Rohm?and?Hass
1845：???????????Rohm?and?Hass
B15：????????????Rohm?and?Hass
Priming paint Mica G 1147 (Mica company product, 1 weight % solid)
With 0.25 weight %GR-5M surfactant
The elastic rubber belt substrate that embodiment 3 usefulness composition, foams are handled
With the device that Fig. 3 roughly represents, prepare the 12 gram/rice of wide 16 inches (40.64 centimetres) by method described in the foregoing description 1
2The fabric of pet fiber of heat bonding.Non-adhesive elastomer Hystretch V-43 (Ohio B.F.Goodrich company product) is coated on the two-layer substrate that has sandwiched spandex yarn, to produce elastic rubber belt substrate as shown in Figure 3.Caking property elastomer natural rubber latex (Ohio Goodyear Rubber Plantations company product) is applied to the two sides of above-mentioned wet elastic rubber belt substrate and in addition dry as foam with 10: 1 blowing ratio.Then the tape substrate that will be coated with habitual cutter sweep be cut into oneself around roll.Behind coating natural rubber latex foam, product shows slight caking property with self.
Also prepared similar elastic rubber belt as follows.With method of the present invention the coating of the low-adhesion bottom sizing LESS foam device by embodiment 1 is applied on the face of above-mentioned non-adhesive polyethylene terephthalate elastic rubber belt substrate.Used low-adhesion bottom sizing is the low-adhesion bottom sizing that uses among the embodiment 1, ties up to that 153 rev/mins of blender speed, 15 rev/mins of pump speeds, flow parameter are provided with 20, inlet condition is provided with 40 pounds/inch
2, 7 pounds/inch of back-pressures
2, foaming under 22: 1 the condition of blowing ratio forms.
Carry out antiseized coating operation with the linear velocity of 12 feet per minutes (3.66 meters/minute), with 2.0 gram/rice
2Ratio with low-adhesion bottom sizing emulsion (in water, the containing 2% solid) coating speed of about 140 Grams Per Minutes coating low-adhesion bottom sizing.Then, will be with 60 gram/rice
2Ratio be coated on difference release liner (differential release liner) (lining 2-80 BKG157/99 AM, this state, Illinois Daubert coating product company product) acrylic acid/Isobutyl 2-propenoate (4: the 96 mol ratios) copolymer on changes stick (as United States Patent (USP) RENo.24,906 is described) is laminated to the uncoated mistake of elastic substrate by the lining dry method that had been coated with habitual method one side.
Prepared elastic rubber belt does not show caking property to the foamy fabric of uncoated mistake.Press the debatching rate of ASTM D-1000 method test tape volume, find that its debatching rate less than/2.54 centimetres of 350 grams, is an acceptable.Also tested the adhesive set situation that is produced by the residue of aforesaid retention of tape roll, its result is satisfactory.The cloth substrate that embodiment 4 usefulness foaming low-adhesion bottom sizing is handled
Prepare acetate measuring fiber pressure sensitive adhesive tape as follows.Will be by the United States Patent (USP) RE No.24 of Ulrich, the mixture of acrylic acid/Isooctyl acrylate monomer that 906 described methods make (4: 96 mol ratios) copolymer adhesive and ethyl acetate solvent is with 60 gram/rice
2Ratio be coated on the one side of long 25 meters, wide 20 centimetres acetic ester fiber (plain cloth of 180 * 48 breadths, Georgia State Milliken company product) and in addition dry in ventilated drying oven.Entering final oven drying before the stage, the coating of the low-adhesion bottom sizing LESS foam device by embodiment 1 is being coated on the non-adhesivity coated face of this substrate with method of the present invention.
Used low-adhesion bottom sizing is the vinyl siloxane copolymer that uses among the embodiment 1, ties up to that 153 rev/mins of blender speed, 15 rev/mins of pump speeds, flow parameter are provided with 20, inlet condition is provided with 40 pounds/inch
2, 7 pounds/inch of back-pressures
2Form with foaming under 22: 1 the condition of blowing ratio.Linear velocity with 12 feet per minutes (3.66 meters/minute) is coated with operation, with 2.1 gram/rice
2Ratio and the speed of about 140 Grams Per Minutes with low-adhesion bottom sizing emulsion (in water, containing 2% solid) coating low-adhesion bottom sizing.
By the debatching rate that ASTM D-1000 method is tested prepared tape roll, find that the debatching rate less than/2.54 centimetres of 350 grams, is acceptable.Also tested the adhesive set situation that is produced by the residue of the retention described in the top embodiment 2 of tape roll, its result is satisfactory, that is, its numerical value is less than 2.5.
Claims (6)
1. one kind with the thin uniform applying coating of the composition, foam method to the porous pressure-sensitive medical adhesive tape, comprises the steps:
1) form porous tape substrate with at least one polymeric fiber surface,
2) foam that forms aqueous emulsion to be to obtain the foaming emulsion, and wherein, foaming emulsion system prepares producing the foam of shrinkage immediately when the emulsion that foams is applied on the tape substrate by mixing water, low-adhesion bottom sizing or release coating and surfactant,
3) will foam at least one surface that emulsion is applied to tape substrate with the tape substrate that obtains being coated with and
4) with pressure-sensitive adhesive coated tape substrate.
2. the method for claim 1 is characterized in that, adds and depresses, and is applied on the tape substrate with the effervescent nozzle emulsion that will foam.
3. the method for claim 1 is characterized in that, when tape substrate is dry, with approximately less than 4 grams/square metre ratio the low-adhesion bottom sizing is applied to above it.
4. one kind with the thin uniform applying coating of the composition, foam method to the porous pressure-sensitive medical adhesive tape, comprises the steps:
1) form porous tape substrate with at least one polymeric fiber surface,
2) at least one surface of usefulness pressure-sensitive adhesive coated tape substrate,
3) form the foam of aqueous emulsion to obtain the foaming emulsion, wherein, composition, foam system by mixing water, low-adhesion bottom sizing or release coating and surfactant prepare with the foam compositions that produces shrinkage immediately when composition, foam is applied on the porous tape substrate and
4) emulsion that will foam is applied to the pressure sensitive adhesive tape of at least one surface to obtain being coated with of tape substrate.
5. one kind with the thin uniform applying coating of the aqueous latex emulsion method to the elastic substrate of weaving, comprises the steps:
1) formation has at least one surperficial elastic substrate,
2) foam that forms the aqueous latex emulsion to be to produce the foaming latex emulsion, and wherein, foaming latex emulsion system prepares producing the foam of shrinkage immediately when the latex emulsion that foams is applied on the elastic substrate of weaving by mixing water, latex and surfactant,
3) will foam that latex emulsion is applied to elastic substrate two-sided with produce the substrate that was coated with and
4) substrate of drying coated mistake.
6. method as claimed in claim 5 is characterized in that, with approximately less than 10 the gram/square metre ratio latex is applied on the elastic substrate.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US292409 | 1988-12-30 | ||
| US16089393A | 1993-12-01 | 1993-12-01 | |
| US160893 | 1993-12-01 | ||
| US29240994A | 1994-08-18 | 1994-08-18 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1136271A true CN1136271A (en) | 1996-11-20 |
Family
ID=26857310
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN94194342A Pending CN1136271A (en) | 1993-12-01 | 1994-11-04 | Process for applying a foamed coating to a medical adhesive tape |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP0731678A1 (en) |
| JP (1) | JPH09506016A (en) |
| KR (1) | KR960706319A (en) |
| CN (1) | CN1136271A (en) |
| CA (1) | CA2176480A1 (en) |
| WO (1) | WO1995015136A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101828989A (en) * | 2010-04-27 | 2010-09-15 | 王婉婷 | Bandage and adhesive tape manufacturing method |
| CN101962914A (en) * | 2009-07-22 | 2011-02-02 | 浙江美欣达印染集团股份有限公司 | Energy-saving and environmentally-friendly double side foam coating method |
| CN112189041A (en) * | 2018-05-23 | 2021-01-05 | 3M创新有限公司 | Adhesive sheet |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19620109A1 (en) * | 1996-05-18 | 1997-11-20 | Beiersdorf Ag | Self-adhesive coated, air-permeable carrier material, process for its production and use |
| DE19620107A1 (en) * | 1996-05-18 | 1997-11-20 | Beiersdorf Ag | Partially self-adhesive coated backing material, process for its production and use |
| DE19729905A1 (en) | 1997-07-12 | 1999-01-14 | Beiersdorf Ag | Substrates for medical purposes |
| EP1010801A3 (en) * | 1999-03-19 | 2000-06-28 | Fibervisions A/S | Composite nonwoven materials |
| US6183249B1 (en) | 1999-07-29 | 2001-02-06 | 3M Innovative Properties Company | Release substrate for adhesive precoated orthodontic appliances |
| FR2990450B1 (en) * | 2012-05-10 | 2015-04-03 | Plasto Technologies | ADHESIVE STRIP FOR THE CONNECTION OF VAPOR BARRIERS AND / OR RAINFALL MEMBRANES IN THE FIELDS OF BUILDING AND CONSTRUCTION |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3121021A (en) * | 1960-04-18 | 1964-02-11 | Minnesota Mining & Mfg | Breathable surgical adhesive tapes |
| US3575782A (en) * | 1967-05-19 | 1971-04-20 | Minnesota Mining & Mfg | Elastic shirred web product |
| US4655056A (en) * | 1985-06-11 | 1987-04-07 | Gaston County Dyeing Machine Co. | Foamed treating liquor applicator |
| FI85753C (en) * | 1988-03-15 | 1992-05-25 | Ahlstroem Oy | CENTRIFUGALPUMPKONSTRUKTION. |
| US5089296A (en) * | 1988-04-08 | 1992-02-18 | Air Products And Chemicals, Inc. | Foam saturation and release coating of a fibrous substrate |
| US4973513A (en) * | 1990-04-04 | 1990-11-27 | Minnesota Mining And Manufacturing Company | Process for applying a release coating to a wet nonwoven backing and article |
-
1994
- 1994-11-04 KR KR1019960702876A patent/KR960706319A/en not_active Application Discontinuation
- 1994-11-04 EP EP95900523A patent/EP0731678A1/en not_active Ceased
- 1994-11-04 CN CN94194342A patent/CN1136271A/en active Pending
- 1994-11-04 JP JP7515606A patent/JPH09506016A/en active Pending
- 1994-11-04 WO PCT/US1994/012653 patent/WO1995015136A1/en not_active Application Discontinuation
- 1994-11-04 CA CA002176480A patent/CA2176480A1/en not_active Abandoned
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101962914A (en) * | 2009-07-22 | 2011-02-02 | 浙江美欣达印染集团股份有限公司 | Energy-saving and environmentally-friendly double side foam coating method |
| CN101962914B (en) * | 2009-07-22 | 2014-05-21 | 浙江美欣达印染集团股份有限公司 | Energy-saving and environmentally-friendly double side foam coating method |
| CN101828989A (en) * | 2010-04-27 | 2010-09-15 | 王婉婷 | Bandage and adhesive tape manufacturing method |
| CN112189041A (en) * | 2018-05-23 | 2021-01-05 | 3M创新有限公司 | Adhesive sheet |
| CN112189041B (en) * | 2018-05-23 | 2022-10-28 | 3M创新有限公司 | Adhesive sheet |
Also Published As
| Publication number | Publication date |
|---|---|
| WO1995015136A1 (en) | 1995-06-08 |
| JPH09506016A (en) | 1997-06-17 |
| EP0731678A1 (en) | 1996-09-18 |
| KR960706319A (en) | 1996-12-09 |
| CA2176480A1 (en) | 1995-06-08 |
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