CN1189135A - Adhesive system for sticking all-round labels - Google Patents
Adhesive system for sticking all-round labels Download PDFInfo
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- CN1189135A CN1189135A CN96195017A CN96195017A CN1189135A CN 1189135 A CN1189135 A CN 1189135A CN 96195017 A CN96195017 A CN 96195017A CN 96195017 A CN96195017 A CN 96195017A CN 1189135 A CN1189135 A CN 1189135A
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Abstract
The invention concerns an adhesive system for sticking all-round labels, said system comprising a priming adhesive and a covering adhesive for permanently sticking the label overlap. At its application temperature, the priming adhesive has significantly higher adhesiveness, measured as tensile strength, than at its conventional storage temperature. In addition, this adhesive has greater affinity to the label than to the hollow body bearing this label. Consequently, the label can easily be removed from the hollow body without leaving residues of adhesive. If, nevertheless, a residue of adhesive should remain on the hollow body, it can advantageously be dissolved by an alkaline solution.
Description
The present invention relates to a kind of on hollow object the adhesive composition of sticking all-round labels, and a kind of this adhesive composition of use and make to form between all-round labels and the hollow object and be easy to untie again bonded assembly method.
At present, mainly use casein based adhesives, label is sticked on the hollow object as glass bottle and polyethylene terephthalate bottle, in these aqueous formulations prescriptions, except certain additional additive, mainly based on casein composition and tackifier resins.Patent documentation WO93/03110 discloses above-mentioned similar substance, has described based on caseic adhesives water-soluble replenishers, filler and other additive in case of necessity.This adhesive character ground contains geocerellite derivant and alcohol.This has just satisfied the requirement of adhesive label on wet glass, even under 15 ℃ temperature, and is used also passable when being higher than 18% (weight) range of concentrations even casein content is starkly lower than usually.
The above-mentioned adhesives that contains the usefulness of labelling of casein composition has significant disadvantages, in cleaning process, be difficult to remove label, European patent application EP 503112 the 1st hurdle the 36th walks in the 2nd hurdle the 52nd row and describes, and " people add a large amount of water with the wash-out label with the washing soda liquid of heating so far.And contain the wastewater treatment expense costliness of dirt, it not only comprise must filtered wastewater removing cellulose fibre, but also comprise by the waste water disposal metal ingredient, aluminium compound particularly, it is present in the printing component and pigment component of label in large quantities.In bottle washing machine, in mean temperature is 82 ℃, and in about 2.5% sodium hydroxide solution, label is broken away from, in this stripping process, the coating layer portion of paper body, and the pigment in the block letter and paint vehicle component forward in the alkali lye naturally, because the dirt of label has polluted alkali lye, people pollute with chemical oxygen demand (CSB) value representation at present.For this reason, winery is necessary for its discharge of wastewater and pays by the CSB standard.
European patent application EP 503112 proposes for addressing the above problem, before wet-cleaned, with mechanical system label is reclaimed object from it and peel off, for this reason, can between label and adhesive phase, insert a separating layer, so just can when peeling off, can not tear by label.Yet, on bottle, still can stay adhesive phase, and need make it to remove with washing soda liquid.Therefore, the problem of removing to noresidue label is not resolved yet.
In German publication DE3434141, put down in writing, wherein to equip with adhesives or fixing with the used so far adhesives (glue) of adhesives replacement.This adhesives must have the not characteristic of age hardness.Therefore, with this adhesives adhesive label on bottle, can remove to noresidue label any time.Yet, the composition of adhesives openly.This adhesives is the coating of gross area ground between bottle surface and label.Its shortcoming is this fixing substrate that needs drying with adhesives.
Automatically going up label appliances company (Automatedl Label Systems Company) proposes to twist in a bottle last adhesive label with the polyethylene band in its printing description advertisement in 1993 " Auto Sleeve ".Wrapping container when it expands, and after contraction, just be attached on the container tightly, wherein, fully without adhesives.By the high-pressure water jet device with the same label that excises of cutter.Container can not be compromised like this.Yet this polyethylene label must be handled at every turn.
German patent DE 3442998 has been described the method that applies all-round labels on container, in the method, at first the limited district of label front end is touched container outer wall, then, after label surrounded around container, will with overlapping qualification district, the rear end bonding of front end thereon.With a kind of thermoplastic with froth bed, the poly-mer of Compound Extrusion is as label, on this froth bed in front the limited range of label, by means of solvent, make poly-mer form a kind of viscosity, curable solution forms temporary transient binding between the limited range of froth bed and container wall, this dies down when being attached at the solvent evaporation more automatically.Container material is not subjected to the aggressive action of solvent.Yet its shortcoming is, must use lower boiling solvent, methylene chloride for example, fragrance or chlorination, the hydrocarbon of aliphatic series.
To the German patent DE 3442997 of Deutsche Reichspatent office application a kind of method that similarly applies all-round labels on container is proposed also in same date, but in this method, only use thermoplastic polymer and the poly-mer of themoplasticity co-extrusion pressure that froth bed need not be arranged as label.Unfavorable to environment when applying all-round labels by this technology, bring rapid evaporation, chloride or aromatic solvent into.
As everyone knows, available unbodied poly alpha olefin is as the hot-melt adhesive basis, and the feature of this hot-melt adhesive is to having good adhesiveness on the ldpe film, and has firm stationarity on pory basic thing.Therefore, it is particularly useful on the hygienic material (for example diaper and so on).As everyone knows, can join the saturated resin that has the low polarity of maximal phase capacitive in this basic poly-mer to resin.The resin of this compatibility is used for the poly alpha olefin of indefiniteness usually as tackifier.In addition, known wax, as Tissuemat E, fischer tropsch process synthetic wax or little product wax are similarly compatible with the indefiniteness polyalkenes, and help to reduce viscosity, change pot life and reduce penetrablility.But show that in a series of embodiment of hotmelt poly alpha olefin is often as key component, in case of necessity with as other resin of second composition and/or other wax.
Task of the present invention is, prepares a kind of adhesives, and it is applicable at hollow object, for example bottle, jar and so on bonding all-round labels.And before cleaning, label is easy to remove and noresidue ground breaks away from hollow object, and or aspect the object of handling adhesive label, there is not common shortcoming in it, and especially, can adopts efficient mechanical to operate in labeling method.
Just can solve task of the present invention with a kind of adhesive composition, it contains two kinds of different hot-melt adhesives, and a kind of is to be used for boning enduringly the overlapping part of all-round labels, and another is temporary transient bonding when it is adhered.
The present invention relates to a kind of adhesive composition that is used for sticking all-round labels, it comprises a kind of adhesion adhesives (Mitnahme-klebstoff) and a kind of adhesive for superposition, it is characterized in that adhering adhesives under its serviceability temperature, have foot in the adhesive bonding property of adhesive label, its bond strength is about 0.005-0.3N/mm under 80 ℃-120 ℃
2It particularly under about 5-30 ℃ laying temperature, does not in fact just have adhesive bonding property after curing.
At room temperature, the bond strength of this adhesion adhesive agent is so little, so that can intactly label be removed from hollow object at an easy rate and do not leave over adhesive residue.When its fusion was used, its bond strength was enough to make label correctly to be located and is high-revolving.Because adhesives completely or partially remains on the label, therefore, the necessary expensive expense that is used for wash bottle in the time of can avoiding so far in the prior art because of label material and adhesive contamination washing alkali liquid.In washing during nonexpondable bottle, the difficulty that causes because of adhesives or label residue can or can not appear hardly again.
After removing label, on hollow object, whether can leave over the adhesion adhesives, maybe can leave over many a spot of adhesion adhesivess, depend on its character of surface fully.At room temperature bond strength be substantially equal to or even during greater than the bond strength on label surface, then adhesives more or less can remain on the hollow object.Even also can be like this under the especially little situation of bond strength of the present invention.Certainly, this adhesion adhesives is preferably alkaline bleach liquor soluble.Otherwise, if the adhesion adhesives does not at room temperature almost have adhesive bonding property, but also fully remain on the label, and be insoluble to alkali.
In the preferred embodiment of the present invention, at least containing 10-100 (weight) by the insoluble adhesion adhesives of the alkali in the adhesive composition of the present invention, preferred at least a unbodied poly alpha olefin of 30-35% (weight), 0-40% (weight), the plasticizer of at least a aromatic dicarboxilic acid ester group of preferred 5-30% (weight), 0-50% (weight), preferred 15-40%'s (weight) is at least a natural, chemical modification or synthetic wax, and accessory ingredient of in common use and additive.
Unbodied poly alpha olefin as the composition of the adhesion adhesives of the component part of adhesive for labels system of the present invention, comprise and be selected from comonomer ethene at least, homopolymer or copolymer one of in propylene and 1-butylene or the 1-hexene, these monomers normally are to mix ground individually or in case of necessity, there is being Ziegler-Natta catalyst to participate in also carrying out polymerization under the low pressure, the mol wt of poly alpha olefin is preferably about 30, about 60, the 000 gram/moles of 000-.
Another kind of possible component at the insoluble adhesion adhesives of the alkali of adhesive for labels system of the present invention is a kind of plasticizer of aromatic dicarboxilic acid ester group, and phthalic acid, different phthalic acid, the corresponding esters class of terephthalic acid.Alcohol groups in the ester used as plasticizer contains 1-8 carbon atom.
Another kind of possible component in the insoluble adhesion adhesives of the alkali of adhesive for labels system of the present invention is at least a natural, chemical modification or synthetic wax.Can use the wax of all kinds compatible with amorphous poly alpha olefin.As natural wax, comprise vegetalitas wax, animality wax, ceresine or petrochemical industry type wax; Wax as chemical modification comprises hard waxes, as the brown coal ester type waxes, and Sarsol wax or the like; As synthetic wax, can be polyalkylene wax, as polyethylene glycol wax, consider from economic point of view, preferably use petrochemical industry type wax, as vaseline, paraffin, ceresine wax, and synthetic wax, particularly its fusing point are 85-140 ℃, mol wt is 500-3,500 Tissuemat E; Its fusing point is 45-70 ℃, and mol wt is the paraffin of 225-500; Its fusing point is 60-95 ℃ a ceresine wax, with and fusing point be 100-115 ℃ metallocene synthetic wax.
In addition, the insoluble adhesion adhesives of above-mentioned alkali also can be added with accessory ingredient of in common use and additive, at first is stabilizer, and it is too early that its function prevents that reactive monomer from entering, or undesirable reaction, and prevents the decementation of the poly-mer in the course of processing.Suitable especially is antioxidant, and its addition is below 3% (weight) of adhesion adhesives usually, and preferred about 0.5% (weight) is advisable.
In a preferred embodiment, adhesion adhesives of the present invention also is that alkali is soluble, and it is in 24 hours, preferably in 3 hours, be preferably in 20 minutes, can saponification or dissolving fully, 1% soda lye under 50 ℃ is the solution of 10% (weight) concentration at the most.And remain in adhesion adhesives on the object, and in washing process, also being dissolved in usually in the cleansing fluid when cleaning, cleansing fluid normally pH value is the water-bearing media of 8-14.
Above-mentioned " water-bearing media " implication in this article is meant the moisture organic matter that alkali reaction is arranged or the solution of inorganic matter, dispersion liquid, or emulsion, and it can dissolve and have organic substance hydrolysis or salt forming group.The example of above-mentioned organic basic material comprises alkanolamine, particularly (gathers) monoethanolamine, and as dead matter, comprises alkali-metal hydroxide, alkali-metal carbonate, and alkali-metal sesquicarbonate, particularly its corresponding sodium and potassium compound.Especially preferably sodium hydroxide and potassium hydroxide.Normally used concentration is the watery sludge of 0.5-40% (weight).
In a preferred embodiment of the invention, the adhesion adhesives comprises, I.20-98% the poly-mer of at least a alkali-soluble of (weight), it is as main poly-mer, at least a natural resin of II.1-70% (weight) based on the resin of functional hydrocarbon resin and modification in case of necessity, at least a plasticizer of III.0.5-30% (weight), at least a accessory ingredient of in common use and the additive of IV.0-3% (weight).
Above-mentioned trunk polymer determines its adhesive bonding property and temperature characterisitic basically, its content is 30-70% (weight) preferably, be more preferably 50-65% (weight), for this reason, trunk polymer is selected from: a.) saturated and/or undersaturated polyesters at first is based on the polyesters of aroma type dicarboxyl acidic group, as phthalic acid, terephthalic acid is particularly by the polyesters of phthalic acid, neopentyl glycol and glycerine or pentaerythrite.B.) have the polyacrylic acid of 1-18 carbon atom, a particularly 1-4 carbon atom and/or the Arrcostab of polymethylacrylic acid.C.) acrylic acid homopolymer and/or copolymer.D.) polyvinyl is a polyvinyl alcohol more than 1000 as mol wt, polyvinylpyrrolidone, the copolymer of vinylpyrrolidone-vinyl acetate, polyvinylether, particularly its alkyl has the polyethylene alkyl ether of 1-4 carbon atom, as polyvinyl methyl ether or polyvinyl ethyl ether.
Resin makes this main chain viscosity that becomes, and improves the compatibility of hot-melt adhesive component, and its consumption is 1-15% (weight) or 15-70% (weight) preferably.For this reason, resin is to be selected from a.) hydroabietyl alcohol and ester thereof, particularly with the ester class of aroma type carboxylic acid such as terephthalic acid and phthalic acid.B.) natural resin of modification preferably, as by the face cream resin, the geocerellite of tall oil resin or wood rosin, for example fully saponified face cream resin or have the Arrcostab of the partially hydrogenated rosin of low softening range in case of necessity is as methyl fat, binaryglycol ester, glycerine ester and pentaerythritol ester, c.) acrylic copolymer, preferably styrene-propene acid copolymer, d.) based on the resin of functional hydrocarbon type resin
The Arrcostab that preferably uses partially hydrogenated rosin is as the resin with viscosity, and its alkyl preferably has 1-6 carbon atom.
The content of the plasticizer in hot-melt adhesive is 5-20% (weight) preferably, and the plasticizer that is suitable for has unit alcohol or polyalcohol, preferably the glycol monomethyl phenyl ether, hexamethylene glycol, glycerine, and particularly its mol wt is 200-6,000 poly-alkyl diol.The mol wt of carbowax is below 1000, and is preferably about below 600.Also available polypropylene glycol, polytetramethylene glycol, and polymethylene glycol.Sometimes also use ester as plasticizer, for example liquid polyester and glycerin ester, for example diacetine and glyceryl triacetate, and neopentyl glycol dibenzoate, glyceryl three benzoic ethers, pentaerythrite four benzoic ethers and 1,4-cyclohexane dimethanol bisbenzoate.In addition, also can use aliphatic acid and alkyl monoamine with 8-36 carbon atom.
Stabilizer and antioxidant, for example three (nonyl phenyl) phosphite is as auxiliary agent and additive.
Can make the soluble hot-melt adhesive of alkali of the present invention by mentioned component.It is water insoluble, even single composition is water-soluble, it is characterized in that having the poly-characteristic of high anti-freezing.
According to the heat stability of hot-melt adhesive of the present invention under the serviceability temperature below 160 ℃, can sustained use (multilayer processing), and can satisfy practical application.Because the thermal instability of single raw material, the polyester of polyethers and saponification for example, above-mentioned situation is wonderful.
Because the high polar intensity of single raw material makes that the viscosity of the hot-melt adhesive of the present invention under 140 ℃ of temperature is low especially, the about 1-2 pool of its maxim (Brookfield, Thermacell RVT11, ASTM D3236-88).Therefore, hot-melt adhesive of the present invention can be used in many devices.
The viscosity of hot-melt adhesive of the present invention depends on the composition of above-mentioned raw materials to a great extent.Therefore, according to expertise is easily to adapt to the specific requirement that will solve, can make the hot-melt adhesive of lasting adhesiveness by the plasticizer of high level, by a spot of plasticizer, particularly during polyalcohol, can make hot-melt adhesive when labelling, have enough bond strengths, and at room temperature only have very low bond strength.This adhesives is applicable to the adhesion adhesives as all-round labels, and it just is easy to remove label before hollow object cleans.
Can obtain different adhesion characteristics according to different prescriptions, therefore, adhesives of the present invention not only can be used as the adhesion adhesives of all-round labels, in addition, also can also be used to paste paper, carboard, plastics, and supatex fabric.
Used adhesive for superposition is to use adhesives with common enough adaptable the labelling that have, and when temperature improves, makes under the situation of bottle expansion owing to emitted carbon dioxide by the thermoplastic plastic bottle, and it plays equilibrium activity.Adhesive for superposition contains tackifying resin as its key component, and contain plasticizer and poly-mer as helper component, and accessory ingredient of in common use and additive, compare with the adhesion adhesives, this adhesive for superposition more or less has uniform viscosity in-10-200 ℃ wide temperature range.In coating during above-mentioned adhesive for superposition, have to be noted that this adhesives not with container, particularly bottle is contacted.
As long as to hollow object, particularly bottle does not require this suitability, and then above-mentioned adhesion adhesives also can be used as adhesive for superposition.
Press object, particularly hollow object that the present invention wants adhesive label, as bottle, jar, pipe, bucket or box, they are basically by coated with metal sheet or plated metal, for example tin-plate or aluminium, glass or thermoplastic plastic, as polyethylene terephthalate, polycarbonate, polyethylene, polypropylene, polyvinylchloride or polystyrene are formed, the preferred polarity plastics, particularly polyester of using are formed, and above-mentioned hollow object is specially adapted to mineral water and belly wash.
Label is by thermoplastic plastic, as polyethylene, and polypropylene, polystyrene, polyvinylchloride or organism glass are formed.This label is preferably based on non-polar plastic, particularly based on the film of directionality polypropylene (OPP).In this case, preferably use the adhesion adhesives of poly alpha olefin.In addition, this all-round labels also can be used in combination poly-mer in case of necessity based on paper.According to material therefor and preparation method, can use down column label: by the prepared simple label of unfinished paper, the prepared label of surface finish paper, the glazing label that makes of label paper by the cast groove, by the prepared label of the paper of evaporating deposition aluminized coating, and open the label that makes by aluminum casting paper.
Shape to label there is no special requirement, must be all-round labels certainly at least.
The invention still further relates to the all-round labels that will have weak band and paste object, the method on the hollow object particularly, wherein used the adhesive composition of the above-mentioned type, its step is as follows: a.) on bottle, or at least on the part back side of all-round labels, apply a kind of adhesion adhesives, wherein, when using the insoluble hot-melt adhesive of alkali of poly alpha olefin, its temperature is 80-200 ℃, preferred 120-180 ℃; And when using alkali solubility ester group hot-melt adhesive, its temperature is 90-160 ℃.B.) add all-round labels and the back side of one end is combined with the front of the other end, c.) cool off this all-round labels.
The invention still further relates to the method that all-round labels that the present invention is pasted is therefrom removed on the aerial object, it is characterized in that, it is cut off with simple mechanical force, in case of necessity on its weak location to all-round labels is removed from hollow object.After the cut-out, just all-round labels can be removed from hollow object with mechanical force gently.But the roller of particularly available pressurized air or backscrolling pulls out or uses hydraulic pressure as mechanical force from bottle on label, and adhesive composition of the present invention is specially adapted to the recirculation of nonexpondable on-cycle hollow object and material and uses.
One of purpose of the present invention is to be used for labelled adhesive composition at hollow object with of the present invention, particularly at glass, pastes the ring all-round labels in metal and/or the plastic bottle.
For example also be applicable to according to adhesive composition of the present invention, in the highly machine that per second is 10.
Further specify the present invention with the following example.A.) hot-melt adhesive of poly alpha olefin
Preparation example A1
Under 150 ℃ of temperature, make the dicyclohexyl phthalate as plasticizer of 27 parts of weight, the Tissuemat E of 38.5 parts of weight, and the antioxidant of 0.5 part of weight mixes mutually, until obtaining uniform compound.Then, its mol wt of 34 parts of weight of adding is the unbodied poly alpha olefin of 35,000 gram/moles in said mixture.
Above-mentioned adhesion adhesives is coated on the film that 100 μ m on the Kofler bench board are thick and 1cm is wide.Put the wide label film of forming by the directionality polypropylene of 1cm then, and applying light.This bonding surface is 1cm * 1cm.Peel off this label film with lacerating machine, and on lacerating machine, read required pulling force.By with the rolling of bottle on the label that scribbles adhesives on the bench board, can judge its binding power and adhesiveness.Draw bond strength thus as following table.
| Temperature (℃) | ???60 | ????70 | ????80 | ????90 | ???100 | ???110 | ???120 | ???130 | ???140 | ???150 |
| Bond strength (N/mm 2) | 0.000 | ?0.000 | ?0.000 | ?0.000 | ?0.008 | ?0.020 | ?0.016 | ?0.004 | ?0.004 | ?0.002 |
Preparation example A2
For example, description by U.S. Pat 4749739, under heating, make the amorphous poly-alpha-olefines of 50 parts of weight, the polycarbonate synthesis resin of 20 parts of weight, the glycerine ester of the rosin of 20 parts of weight of portions hydrogenations, the synthetic hard wax of the polyethylene cerul that the Fischer-Tropsch synthetic method of 10 parts of weight makes, and the antioxidant of 0.4 part of weight reacts and makes and be used for the common overlapping hotmelt of using that adhesive label is used on jar, glass bottle and polyethylene terephthalate bottle.
Application examples A1
Under 145 ℃, the adhesion adhesives that preparation example 1 is made is with 50 gram/rice with Contiroll labeller (Fa.Krones, Neutraubling, system)
2Consumption be coated in the label back side, and label is pasted be placed on the bottle, and on bottle overlapping bonding with fixing.Therefore, the adhesive for superposition of coating preparation example 2 on the front end position at the label back side.But it does not directly contact with bottle.
Stick this polyethylene terephthalate bottle of all-round labels, remove the machine of labelling after, after cooling, with boning label is fixed on the bottle tightly by overlapping.
The removal label is performed such, and is with in the weakness that exists and cuts off label.At this moment label only keeps by adhesion adhesives 1, and shown in example 1, the adhesion adhesives for example only has minimum viscosity in cold conditions under 20 ℃ of-40 ℃ of room temperatures, therefore with minimum mechanical force, just can easily label be removed from bottle.Wherein, adhesives is stayed on the label fully.Yet, before labeled bottle is being removed label, can store down in common condition (40 ℃, sprinkle water).B.) the soluble hotmelt of alkali.
Preparation example B1.
Preparation at room temperature has the alkali solubility adhesion adhesives of better binding power than it under application of temperature.
Heating down, make 59.0% (weight) based on phthalic acid, pentaerythrite and neopentyl glycol, saturated aromatic polyester Phthalopal
The styrene-propene acid copolymer (ACX 12-436) of NP (a kind of nothing oil phthalic ester resin is by the preparation of BASF AG company), 20.0% (weight), the rosin Arrcostab of 10.0% (weight) are (by the Herkolyn of Her-Cules Inc company preparation
), the mol wt of the methyl ester of especially partially hydrogenated rosin, 10.0% (weight) is (Irgafos of CibaGeigy company preparation of the stabilizer based on three (nonyl phenyl) phosphite of the carbowax and 1.0% (weight) of 400 (Polydiol 400)
TNPP) evenly mix and preparation adhesion adhesives mutually.
Preparation example 2
Described by U.S. Pat 4749739, preparation is used for the overlapping hot-melt adhesive of using commonly used of adhesive label on jar, glass bottle and the polyethylene bottle.By under heating, the synthetic polyterpene resin that makes the unbodied polyalphaolefin (the Vestoplast V3649 of Huls AG company) of 50 parts of weight, 20 parts of weight is (by Goodyear Tire ﹠amp; The Wingtack of Rubber company
95), the glycerin ester of the rosin of the 20 parts of weight of portions (Fhoral of Hercules Inc company
85), the synthetic hard wax based on Tissuemat E (the Vestowax A616 of Huls AG company) that makes with fischer-tropsch process of 10 parts of weight and respectively be the antioxidant Irganox of 0.2 part of weight
1010 (Ciba-Geigy) and Irganox
PS802 (Ciba-Geigy) reacts and prepares.
Application examples B1
Under 120 ℃ of-150 ℃ of temperature, the adhesives of will adhering is coated on the polycarbonate bottles, and under this temperature, it has enough binding powers, so that the polypropylene all-round labels is taken out from the label basin.Then, label is remained on the bottle, be securely fixed on it until it, then the adhesive for superposition with embodiment 2 is coated on the back side of label end.
For ampoule with little expansion and label made of paper, the adhesion adhesives that also can use embodiment 1 as adhesive for superposition with overlapping bonding.
The adhesion adhesives has following characteristics, promptly under cold conditions or when depositing (room temperature), only has very little bond strength, so that for example just can easily label be removed from bottle with cutter.Can not occur tearing, particularly under the situation of label made of paper.It is better than the advantage of prior art, is that label can be removed from bottle fully before handling with bottle washing machine.Therefore, cleansing fluid can not polluted by the paper residue.After removing label with less mechanical force, most of adhesives is stayed on the bottle, but in bathing as 1% sodium hydroxide solution that is dissolved in 80 ℃ in 2-10 minute fully soon, adhesion adhesives of the present invention is almost nonhygroscopic, and can the saturating not label made of paper of coating of oil.
Claims (14)
1. the adhesive composition that is used for the hot-melt adhesive of sticking all-round labels on object, comprising a kind of adhesion adhesives and a kind of adhesive for superposition, it is characterized in that, when application of temperature, this adhesion adhesives has enough bond strengths that is used for adhesive label, and when it is positioned on object or the label, then do not have bond strength.
2. according to the adhesive composition of claim 1, it is characterized in that when 80-200 ℃ application of temperature, its bond strength is 0.005-0.030N/mm
2
3. according to the adhesive composition of claim 1 or 2, it is characterized in that, this adhesion adhesives contains at least a amorphous poly-alpha-olefines of 10-100% (weight), at least a plasticizer of 0-40% (weight) based on the aromatic dicarboxylic acid ester, at least a natural chemical modification of 0-50% or synthetic wax, and accessory ingredient of in common use in case of necessity and additive.
4. according to the adhesive composition of claim 1 or 2, it is characterized in that this adhesion adhesives is dissolved in one day in 1% the sodium hydroxide solution substantially fully under 50 ℃, and noresidue.
5. according to the adhesive composition of claim 4, it is characterized in that this adhesion adhesives contains:
(I) at least a alkali solubility trunk polymer of 20-98% (weight),
(II) 1-70%'s (weight) is at least a based on the resin of functional hydrocarbon resin and the natural resin of modification,
(III) at least a plasticizer of 0.5-30% (weight),
(IV) at least a accessory ingredient of in common use and the additive of 0-3% (weight).
6. according to the adhesive composition one of among the claim 1-5 at least, it is characterized in that adhesive for superposition contains the fusible resin as main component, as the plasticizer and the poly-mer of auxiliary element, and other accessory ingredient of in common use and additive.
7. make between the all-round labels that has weak band in case of necessity and the object and form the associated methods that is easy to untie, the adhesive composition that one of has wherein used at least among the aforesaid right requirement 1-6, its step is as follows:
A.) under 80-200 ℃ of temperature, the adhesion adhesives is coated in to the surface of the all-round labels of small part or on the container,
B.) apply and enclose the bag loop tag, and make the positive bonding of the back side of one end and the other end with adhesive for superposition,
C.) cool off this all-round labels.
8. by the method for removing the all-round labels of pasting according to claim 7 on the object, it is characterized in that after it cut off, all-round labels by slight mechanical force just from object separately.
9. method according to Claim 8 is characterized in that, the mechanical force that is applied is pressurized air or hydraulic pressure.
10. according to the application of the adhesive composition of claim 1 to 6, it is used in object, and ducted body especially is as bottle, jar, bucket, pipe or the sticking all-round labels that closes.
11. the application according to claim 10 is characterized in that, the body surface of adhesive label, comprises the surface coated with metal sheet or metallizing, particularly sheet tin or aluminium, glass, pottery or thermoplastic material.
12. the application according to claim 11 is characterized in that, thermoplastic material is polyethylene terephthalate, polyvinylchloride, polypropylene, polyethylene, polycarbonate or polystyrene.
13. at least one application according in the aforementioned claim is characterized in that all-round labels is based on paper or thermoplastic material.
14. the application according to claim 13 is characterized in that, all-round labels comprises directed polypropylene.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN96195017A CN1189135A (en) | 1995-06-26 | 1996-06-24 | Adhesive system for sticking all-round labels |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19522568.6 | 1995-06-26 | ||
| DE19617962.9 | 1996-05-06 | ||
| DE19618549.1 | 1996-05-09 | ||
| CN96195017A CN1189135A (en) | 1995-06-26 | 1996-06-24 | Adhesive system for sticking all-round labels |
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| Publication Number | Publication Date |
|---|---|
| CN1189135A true CN1189135A (en) | 1998-07-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN96195017A Pending CN1189135A (en) | 1995-06-26 | 1996-06-24 | Adhesive system for sticking all-round labels |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109896107A (en) * | 2017-12-08 | 2019-06-18 | 纮华电子科技（上海）有限公司 | A kind of label feeding machine |
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1996
- 1996-06-24 CN CN96195017A patent/CN1189135A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109896107A (en) * | 2017-12-08 | 2019-06-18 | 纮华电子科技（上海）有限公司 | A kind of label feeding machine |
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