CN101100586A - Electron beam and ultraviolet crosslinking for composition layer and products produced from the same layer - Google Patents
Electron beam and ultraviolet crosslinking for composition layer and products produced from the same layer Download PDFInfo
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- CN101100586A CN101100586A CNA2006101389722A CN200610138972A CN101100586A CN 101100586 A CN101100586 A CN 101100586A CN A2006101389722 A CNA2006101389722 A CN A2006101389722A CN 200610138972 A CN200610138972 A CN 200610138972A CN 101100586 A CN101100586 A CN 101100586A
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Abstract
A radiant cross-linking method of double-face adhesive tape can be used as lining back material coated with binder on double faces and un-symmetrically radiated from both sides by different dose in radiant appliance.
Description
Technical field
The electron beam (EB) and the UV that the present invention relates to composition layer are crosslinked, and relate to the product by these layers manufacturing.
Background technology
For acrylic pressure sensitive tackiness agent (PSA) composition, particularly remarkable adhering generation needs crosslinked, and this is just known for a long time.For rubber also is by the crosslinked adhesivity that improves.
In the manufacturing of sealing tape, have than chemistry/special advantage of heat cross-linking method by the application of the radiation crosslinking of UV radiation or electron beam (EB).Radiation crosslinking also is advantageously used in the manufacturing double-faced adhesive tape.
For any given acceleration voltage, the depth profile of the radiation dose that is absorbed in the product under being exposed to accelerated electron is known.Many authors derived the empirical function that is used for this situation (Heger for example, beta-gamma 1,20,1990; Neuhaus-Steinmetz, RadTech Europe, Mediterraneo 1993).
If because the weight per unit area of product causes the maximum acceleration voltage of electron beam equipment to be not enough to full and uniform eradiation product greatly, then document and company's brochure have been described from both sides radiating possibility, and wherein the acceleration voltage of setting for both sides all is identical with radiation dose.
For the product of forming by crosslinked coating of desire and radiation degradable backing, by optimizing acceleration voltage infringement is minimized, wherein said coating can for example be a pressure-sensitive adhesive, and described backing for example is paper, weaving or non-woven fibre element and OPP film.In this case, the mean dose that backing is subjected to significantly is lower than coating, and the dosage reduction still is in the acceptable limit in the coating simultaneously.
Above-mentioned condition also be described in EP 0 453 254B (people such as Yarosso) and incidental by doctor Karmann 7
ThMunich Adhesives and Finishing Seminar is in the paper of being given a report on 1982.
Be included in both sides and have the backing of desire cross-linked binder composition and the double-faced adhesive tape of anti-stick release liner, when using accelerated electron, should receive the dosage that is no more than about 10-15kGy by a side homogeneous radiation; Otherwise, must change release liner because machinery and pick resistance are unacceptable aging.Maximum acceptable absorbing radiation dosage changes with pressure-sensitive adhesive type and release coating type.
Even here, given suitable layer thickness if the radiation dose in the release liner significantly descends, also can reduce undesirable influence by the selection acceleration voltage that skill is arranged.Yet should be noted in the discussion above that here still must receive towards the psa layer of release liner is enough to crosslinked radiation dose.
If the both sides of radiation double-faced adhesive tape symmetrically, it is included in backing and anti-stick release liner that both sides have the PSA composition, and the latter receives whole radiation dose.This also is applied to be called those sealing tapes of transfer adhesive adhesive tape, and wherein under the situation of not having more backings, the pressure-sensitive adhesive that desire is crosslinked is coated on the release liner.
From above-mentioned commentary, can know clearly, to such an extent as to when the required radiation dose of crosslinked psa layer high when making that the machinery of release liner and pick resistance are reduced to unacceptable degree, release liner adopt the required cost of electron beam crosslinking double-faced adhesive tape to become quite big, because must be replaced with new, not irradiated liner by covering again in this case.
Summary of the invention
The objective of the invention is, can advantageously make the backing material of double-faced adhesive tape or common double spread by using accelerated electron or UV radiating radiation crosslinking.
This purpose is by realizing as the method that independent claim proposed.Dependent claims has been described the favourable embodiment of this method and second embodiment of this method.
The present invention correspondingly provides the radiation crosslinking method of double-faced adhesive tape, wherein adopts various dose from the two-sided backing material that scribbles tackiness agent of anisopleual eradiation in radiation devices.
In a kind of favourable embodiment, the radiation crosslinking method of double-faced adhesive tape comprises the steps:
A) with adhesive A coating backing material,
B) adopt dosage A and the acceleration voltage A that sets on the EB equipment, EB-crosslinked in the composition side adhesive A/backing subunit (subunit) of (composition side),
C) use release liner to add the cushions to adhesive A,
D) with the opposite side of tackiness agent B coating backing material and
E) adopt dosage B and the acceleration voltage B that sets on the EB equipment, the assembly of EB-radiation on binder composition B exposed side, wherein on cooling roller, guide the side of carrying release liner, and dosage A and dosage B and/or acceleration voltage A and acceleration voltage B has different value by the EB evaluation method selecting optimal equipment.
Need not to change release liner, and need not overlapping operation again.The step of this method can once be finished.If think needs, also can carry out the additional leveling of embedded (in-line) pre-treatment and backing, promptly because backing lacks planeness (for example warpage) and make backing level and smooth by heating.
For this reason, at first, under the crosslinked situation of EB, as the function of each thickness of component layer, calculate radiating acceleration voltage and the dosage of desiring on EB equipment, to be provided with for the second time of being used for, in composition layer, adopt up to 80kGy or above total dose, preferably, make by means of computer program:
A) keep dosage on the release liner exposed side less than 40kGy, preferably less than 10kGy,
B) keep release liner/binder composition A dosage at the interface less than 50kGy, preferably less than 15kGy,
C) keep surface dose among the binder composition B less than (target dose+25%), preferably less than (target dose+15%) and
D) keep backing/binder composition B dosage at the interface greater than (target dose-25%), be preferably more than (target dose-15%),
E) simultaneously on the other hand, the dosage reduction in the binder composition B of backing is no more than 45% of target dose, preferably is no more than 25% of target dose.
Target dose represents, when obtaining optimum product property by radiation dose that binder composition absorbed.
(for example use Gauss-newton's method of approximation) then by this way and calculate and be used for radiating acceleration voltage and radiation dose for the first time, thereby make that total radiation dosage departs from desirable target value less than 30% in the layer of binder composition A, preferably less than 10%, wherein said desirable target value can be different from the target value of binder composition B.
For example, use following experimental formula as the foundation of calculating, it, is delivered on the Mediterraneo 1993 at RadTech Europe by Neuhaus-Steinmetz.
Wherein
D is to be the dosage of unit with %
U
BBe to be the acceleration voltage of unit with kV
X is the radiation weight of per unit area, with g/m
2Be unit, it comprises the air gap between weight, vacuum window and the product of vacuum window per unit area and the degree of depth of product.
From the asymmetric radiation of both sides, making has limited and full and uniform radiation dose on two binder layers, and the radiation dose on release liner reduces greatly simultaneously.This has saved effort and has been easy to generate wrong overlapping operation again.
In addition, this method also allows the crosslinking degree of the binder composition on the sealing tape either side that controlled difference is arranged.
It also is possible that controlled crosslinked distribution (profile) is set on the degree of depth of adhesive composition layer., preferably be chosen in for the first time and acceleration voltage in the radiation for the second time and setting dosage for this reason, make forming the degree of depth/dosage profile that rises or descend on the direction of backing in binder composition A, the while influences its cohesiveness with controllable mode.
In addition, in binder composition final radiation dose can be preferably up to 80kGy or more than, and selected EB acceleration voltage can be 40-350kV.Weight at per unit area in the electron beam path of product can be 20-250g/m usually
2, the weight of wherein said unit surface depend on the structure of electron-beam accelerator and comprise on the vacuum window per unit area weight and to the air gap of product.
Used binder composition can be acrylate and rubber, and it is with solution or dispersion or hot-melt adhesive composition use, and wherein binder composition A and B also can be inequality.In addition, binder composition can be that fill, painted and/or foaming.
The backing material that is adopted is those for being made by MOPP, BOPP, HDPE, LDPE, polyester, PVC, paper, non-woven fabrics or foam materials especially.
At last, present method is generally used for the radiation crosslinking of the backing material of double spread, wherein adopts the backing material of various dose by anisopleual eradiation double spread in radiation devices.
In this case, relevant coating is not a binder composition.
Embodiment
In first kind of substituting preferred implementation, the radiation crosslinking method that is used for double-faced adhesive tape comprises the steps:
A) with adhesive A coating backing material,
B) adopt setting dosage A and acceleration voltage A, EB-is crosslinked in the lateral adhesive A of composition/backing subunit, but wherein adhesive A is that UV-and EB-are crosslinked,
C) use release liner to add the cushions to adhesive A,
D) with the opposite side of tackiness agent B coating backing material and
E) adopt surface dose B, the assembly of UV-radiation on binder composition B exposed side.
By selecting to have the light trigger of suitable wavelength, selection is at the acceleration voltage and the setting dosage of the radiating electron beam first time, with at the radiating UV radiating penetration depth second time, make that in binder composition A the crosslinked distribution towards backing is actually constant.
This embodiment also demonstrates the advantage with EB-degradable backing, and wherein in this case, it is subjected to radiation and obviously is less than the crosslinked situation by both sides EB.In addition, peel off backing and do not receive EB dosage.
In using the UV radiating crosslinked process second time, the UV dosage that is absorbed in tackiness agent B is shown exponential function greatly and is reduced along with the degree of depth towards the backing direction.And before penetrating adhesive A, it passes the backing of UV-transmissibility, there, conversely, from backing on the direction of release liner, UV dosage takes place to reduce near exponential.
In using the EB radiating crosslinked process first time, select the dosage A and the acceleration voltage A of setting, make and in adhesive A, follow the UV radiating crosslinked process for the second time of using, especially by opposite EB dose gradient, on entire depth, reach roughly crosslinked uniformly, perhaps produce controlled crosslinked distribution.
If in tackiness agent and backing, the accurate reduction relevant with the degree of depth is known words on UV dosage, can pure mathematics method parameters optimization.In addition, optimum experimental, the particularly optimum experimental of acceleration voltage A are favourable.
In second kind of substituting preferred implementation, the radiation crosslinking method that is used for double-faced adhesive tape comprises the steps:
A) with adhesive A coating backing material, the described tackiness agent of the equal crosslinkable of UV and EB wherein,
B) in radiation device, use surface dose A UV-radiation scribbles the backing of adhesive A, but wherein adhesive A is that UV-and EB-are crosslinked,
C) use release liner to add the cushions to adhesive A,
D) with the opposite side of tackiness agent B coating backing material and
E) adopt dosage B and the acceleration voltage B that sets on the EB equipment, the assembly of EB-radiation on binder composition B exposed side wherein guides the side of carrying release liner by the EB evaluation method selecting optimal equipment on cooling roller.
In adhesive A, the UV dosage that is absorbed is shown exponential function greatly and is reduced along with the degree of depth towards the backing direction, and wherein the reduction degree in the wavelength region of hope depends on various factors.Therefore, because certain layer thickness, tackiness agent crosslinked on the backing direction is insufficient.This can be by being compensated from the opposite EB dose gradient of EB radiating in following process.
In this case, the dosage B and the acceleration voltage B that select to set, make observe be used for tackiness agent B and release liner, at first preferred embodiment specified dosage range.If the accurate reduction relevant with the degree of depth of UV dosage is known, can pass through pure mathematics method parameters optimization.In addition, (particularly acceleration voltage B) optimum experimental is favourable.
In the third substituting preferred implementation, the radiation crosslinking method that is used for double-faced adhesive tape comprises the steps:
A) be coated with release liner with adhesive A,
B) adopt dosage A and the acceleration voltage A that sets on the EB equipment, EB-is crosslinked in the lateral adhesive A of composition/release liner subunit,
C) use the backing material to add the cushions to adhesive A,
D) with the opposite side of tackiness agent B coating backing material and
E) adopt dosage B and the acceleration voltage B that sets on the EB equipment, the assembly of EB-radiation on binder composition B exposed side, wherein on cooling roller, guide the side of carrying release liner, and dosage A and dosage B and/or acceleration voltage A and acceleration voltage B has different value by the EB evaluation method selecting optimal equipment.
In the 4th kind of substituting preferred implementation, the radiation crosslinking method that is used for double-faced adhesive tape comprises the steps:
A) be coated with release liner with adhesive A,
B) in radiation device, use surface dose A UV-radiation scribbles the release liner of adhesive A, but wherein adhesive A is that UV-and EB-are crosslinked,
C) use the backing material to add the cushions to adhesive A,
D) with the opposite side of tackiness agent B coating backing material and
E) adopt dosage B and the acceleration voltage B that sets on the EB equipment, the assembly of EB-radiation on binder composition B exposed side wherein guides the side of carrying release liner by the EB evaluation method selecting optimal equipment on cooling roller.
At the radiation first time, by selecting to have the light trigger of suitable wavelength, UV radiating penetration depth, with acceleration voltage B that selects electron beam at the radiation second time and setting dosage B, make in binder composition A the crosslinked distribution towards backing be actually constant, influence its cohesiveness with controllable mode simultaneously.
In addition, at the radiation first time, by selecting to have the light trigger of suitable wavelength, select UV radiating penetration depth, and select acceleration voltage B and setting dosage B at the radiating electron beam second time, make that crosslinked being distributed in risen or descended in binder composition A on the direction of backing, influence its cohesiveness with controllable mode simultaneously.
Purpose hereinafter is in order to serve as that method of the present invention is set forth on the basis with some embodiment, but not unnecessarily limits described method.
Embodiment 1
Make double-faced adhesive tape with following operation:
A) apply backing with first composition layer,
B) this subunit of electron beam crosslinking,
C) apply release liner,
D) with second composition layer apply backing and
E) this assembly of electron beam crosslinking.
The electron beam equipment that is adopted has 124g/m
2High vacuum and product between need the weight (a weight per unit area between high vacuum and product, requiring irradiation) of radiating per unit area.
The thickness of each layer of product is as follows:
MOPP backing: 45g/m
2
First composition layer: 100g/m
2, acrylate
Release liner: 80g/m
2And
Second composition layer: 100g/m
2, acrylate
The acrylic binder composition is corresponding to being described in, for example those among DE39 42 232 or the DE 43 13008.
Set under the dosage and be used for for the second time that the 183kV acceleration voltage and the 88kGy of cross-linking step set under the dosage at the 150kV acceleration voltage that is used for cross-linking step for the first time and 67kGy, the total dose within 80 ± 9kGy (referring to Fig. 1) in two composition layers.
Release liner is less than 10kGy in institute's raying on the side of first composition layer, and institute's raying is less than 2kGy on exposed side.Find that expansion power and peeling force only have the increase of appropriateness, and do not observe the residuum (picking) that suffers damage and cause because of release liner.The mensuration of expansion power is according to AFERA 4013/DIN E 1944, and according to corresponding with release force from the FTM3 of FINAT peeling force, wherein preserves under temperature.
Cohesiveness after coating on both sides, under the 250kV acceleration voltage, adopts 80kGy to set dosage with the radiation of whole assembly once corresponding to these substituting manufacture method for this reason.But in this case, the increase of expansion power and peeling force is so significantly, to such an extent as to must change release liner at once behind electron beam crosslinking.
Along with acceleration voltage is reduced to 210kV, on the one hand, the dosage in first composition layer has passed through low for sealing tape, so that there are not enough shearings resistance, and on the other hand, the reduction of dosage is not enough to still prevent that release liner is subjected to unacceptable infringement in release liner.
Embodiment 2
The step of preparation sealing tape is corresponding to the step of embodiment 1.
The electron beam equipment that is adopted has 76g/m
2The weight that between high vacuum and product, needs the radiating per unit area.
The thickness of each layer of product is as follows:
Cellulosic nonwoven fabric backing: 13g/m
2
First composition layer: 45g/m
2, acrylate
Release liner: 60g/m
2And
Second composition layer: 35g/m
2, acrylate
Set under the dosage and be used for for the second time that the 114kV acceleration voltage and the 90kGy of cross-linking step set under the dosage at the 97kV acceleration voltage that is used for cross-linking step for the first time and 67kGy, the total dose within 80 ± 10kGy (referring to Fig. 2) in two composition layers.
Release liner is less than 12kGy in institute's raying on the side of first composition layer, and institute's raying is less than 1kGy on exposed side.
Cohesiveness is still corresponding to these manufacture method, wherein with the one-sided radiation equably of target dose.Here, realize that on release liner enough reductions of dosage are impossible to avoid infringement, it is owing to insufficient dosage on composition layer A causes.
Embodiment 3
Make double-faced adhesive tape with following operation:
A) apply release liner with first composition layer,
B) first composition layer of electron beam crosslinking on release liner,
C) apply backing,
D) with second composition layer be coated on the backing side assembly and
E) this assembly of electron beam crosslinking.
The electron beam equipment that is adopted has 122g/m
2The weight that between high vacuum and product, needs the radiating per unit area.
The thickness of each layer of product is as follows:
Cellulosic nonwoven fabric backing: 8.5g/m
2
First composition layer: 65g/m
2, acrylate
Release liner: 130g/m
2And
Second composition layer: 60g/m
2, acrylate
Set under the dosage and be used for for the second time that the 178kV acceleration voltage and the 63kGy of cross-linking step set under the dosage at the 164kV acceleration voltage that is used for cross-linking step for the first time and 14kGy, the total dose within 60 ± 11kGy (referring to Fig. 3) in two composition layers.
Release liner is less than 50kGy in institute's raying on the side of first composition layer, and institute's raying is less than 5kGy on exposed side.Do not observe the residuum that suffers damage and cause because of release liner.The increase of expansion power and peeling force is in the permissible scope.
Cohesiveness after coating on both sides, under the 205kV acceleration voltage, adopts 60kGy to set dosage with the radiation of whole assembly once corresponding to these substituting manufacture method for this reason.But in this case, the increase that launches power is so remarkable, to such an extent as to must change release liner at once behind electron beam crosslinking.
Be reduced to the level of this embodiment along with the radiant exposure on the release liner exposed side (radiation exposure), its low acceleration voltage by 180kV carries out, dosage on first composition layer has passed through low for sealing tape, to such an extent as to there are not enough shearings resistance, the power of launching simultaneously is corresponding to this embodiment.
Embodiment 4
Step, product structure and the electron beam equipment of preparation sealing tape only need the EB dosage of 50kGy corresponding among the embodiment 1 those except second composition layer.
The 164kV acceleration voltage and the 67kGy of cross-linking step set under the dosage being used for for the first time, with the 190kV acceleration voltage and the 54kGy of cross-linking step set under the dosage being used for for the second time, total dose in first composition layer is within 80 ± 4kGy, and the total dose in second composition layer within 50 ± 4kGy (referring to Fig. 4).
Release liner is less than 12kGy in institute's raying on the side of first composition layer, and institute's raying is less than 2kGy on exposed side.
Cohesiveness is corresponding to required value.
Because different total dose in the binder layer, these products can not be made with one-sided radiation, can not be made by the zygomorphy radiation.
Embodiment 5
Make double-faced adhesive tape with following operation:
A) apply backing with first composition layer,
B) crosslinked this subunit of UV-,
C) apply release liner,
D) with second composition layer apply backing and
E) this assembly of electron beam crosslinking.
The electron beam equipment that is adopted has 76g/m
2The weight that between high vacuum and product, needs the radiating per unit area.
The thickness of each layer of product is as follows:
PP backing: 28 μ m
First composition layer: 70g/m
2, acrylate
Release liner: 80g/m
2And
Second composition layer: 70g/m
2, acrylate
But but to be UV-crosslinked and electron beam crosslinking for first composition layer.By middle pressure mercury UV lamp or low pressure UVC lamp, adopt 75mJ/cm for light trigger BA (benzoin acrylate)
2The UVC surface dose, it is crosslinked, wherein introduce described initiator with the level of 0.5wt% by polymerization.By the employing of first binder composition, with UVC intensity with the degree of depth approximately with every 25g/m
2Five equilibrium, this half-value depth is influenced by various factors.
The 145kV acceleration voltage and the 87kGy of cross-linking step set under the dosage being used for for the second time, and for electron beam crosslinking, the dosage in second composition layer is within 80 ± 7kGy.
Release liner is less than 12kGy in institute's raying on the side of first composition layer, and institute's raying is less than 1kGy on exposed side.Find that expansion power and peeling force only have the increase of appropriateness, and do not observe the residuum that suffers damage and cause because of release liner.
Except UVC dosage, first composition layer also receives the portions of electronics beam dose, and consequently, the UVC dose gradient that is intended in a kind of first binder layer of composite formula is compensated by opposite EB gradient, and has realized that abundant constant is crosslinked.
Do not have electron beam crosslinking in the second composition side, the force of cohesion of first composition layer is not enough to reach the required shearing resistance of product.
Embodiment 6
Make double-faced adhesive tape with following operation:
A) apply backing with first composition layer,
B) crosslinked this subunit of EB-,
C) apply release liner,
D) with second composition layer apply backing and
E) crosslinked this assembly of UV-.
But but to be UV crosslinked and electron beam crosslinking for first composition layer.
The electron beam equipment that is adopted has 76g/m
2The weight that between high vacuum and product, needs the radiating per unit area.
The thickness of each layer of product is as follows:
PTE backing: 12g/m
2
First composition layer: 60g/m
2, acrylate
Release liner: 80g/m
2And
Second composition layer: 30g/m
2, acrylate
Under 122kV acceleration voltage and 75kGy setting dosage, carry out the cross-linking step first time.By means of middle pressure mercury UV lamp or low pressure UVC lamp, carry out the cross-linking step second time, wherein the light trigger BA for copolymerization adopts 75mJ/cm
2UVC dosage.
Except the EB dosage of setting, first composition layer also receives the UVC dosage that part is set.
For the UV radiation, chemical system and wavelength are depended in the reduction of the dosage relevant with the degree of depth in the product, and can not influence given light trigger largely under the situation of being free from side effects.In order to optimize the cohesiveness of first composition layer, by acceleration voltage with set EB dosage, on the entire depth of first composition layer, adjust by EB dosage and UV dosage cause crosslinked.In fact do not expose release liner.Do not find the increase of expansion power and peeling force, and do not observe the residuum that suffers damage and cause because of release liner.
Claims (18)
1, a kind of radiation crosslinking method of double-faced adhesive tape wherein adopts various dose from the two-sided backing material that scribbles tackiness agent of anisopleual eradiation in radiation devices.
2, according to the radiation crosslinking method of the double-faced adhesive tape of claim 1, it comprises the steps:
A) with adhesive A coating backing material,
B) adopt dosage A and the acceleration voltage A that sets on the EB equipment, the crosslinked adhesive A/backing subunit on the composition side of EB-,
C) use release liner to add the cushions to adhesive A,
D) with the opposite side of tackiness agent B coating backing material and
E) adopt dosage B and the acceleration voltage B that sets on the EB equipment, the assembly of EB-radiation on binder composition B exposed side,
Wherein dosage A and dosage B and/or acceleration voltage A and acceleration voltage B have different value.
3, according to the radiation crosslinking method of the double-faced adhesive tape of claim 1, it comprises the steps:
A) with adhesive A coating backing material,
B) adopt dosage A and the acceleration voltage A that sets on the EB equipment, the crosslinked adhesive A/backing subunit on the composition side of EB-, but wherein adhesive A is that UV-and EB-are crosslinked,
C) use release liner to add the cushions to adhesive A,
D) with the opposite side of tackiness agent B coating backing material and
E) adopt surface dose B, the assembly of UA-radiation on binder composition B exposed side.
4, according to the radiation crosslinking method of the double-faced adhesive tape of claim 1, it comprises the steps:
A) with adhesive A coating backing material,
B) adopt surface dose A in radiation device, the UV-radiation scribbles the backing of adhesive A, but wherein adhesive A is that UV-and EB-are crosslinked,
C) use release liner to add the cushions to adhesive A,
D) with the opposite side of tackiness agent B coating backing material and
E) adopt dosage B and the acceleration voltage B that sets on the EB equipment, the assembly of EB-radiation on binder composition B exposed side.
5, according to the radiation crosslinking method of the double-faced adhesive tape of claim 1, it comprises the steps:
A) be coated with release liner with adhesive A,
B) adopt dosage A and the acceleration voltage A that sets on the EB equipment, the crosslinked adhesive A/release liner subunit on the composition side of EB-,
C) use the backing material to add the cushions to adhesive A,
D) with the opposite side of tackiness agent B coating backing material and
E) adopt dosage B and the acceleration voltage B that sets on the EB equipment, the assembly of EB-radiation on binder composition B exposed side,
Wherein dosage A and dosage B and/or acceleration voltage A and acceleration voltage B have different value.
6, according to the radiation crosslinking method of the double-faced adhesive tape of claim 1, it comprises the steps:
A) be coated with release liner with adhesive A,
B) adopt surface dose A in radiation device, the UV-radiation scribbles the release liner of adhesive A, but wherein adhesive A is that UV-and EB-are crosslinked,
C) use the backing material to add the cushions to adhesive A,
D) with the opposite side of tackiness agent B coating backing material and
E) adopt dosage B and the acceleration voltage B that sets on the EB equipment, the assembly of EB-radiation on binder composition B exposed side.
7, according to the method for one of claim 1-6, it is characterized in that, on cooling roller, guide side with release liner by electron beam equipment.
8, according to the method for one of claim 1-7, it is characterized in that, in the radiation first time, select acceleration voltage and radiation dose, make comprise among the binder composition A from the second time radiating radiation dose total radiation dosage depart from objectives dosage be no more than ± 30%, preferably be no more than ± 10%.
9, according to the method for one of claim 1-8, it is characterized in that, in the radiation second time, select acceleration voltage and radiation dose, make on the one hand, be no more than 50kG at release liner and binder composition A radiation dose at the interface, preferred 12-15kGy, and the dosage on open side is no more than 40kG, preferably be no more than 10kGy, and on the other hand, the dosage reduction towards backing in binder composition B is no more than 45% of target dose, preferably is no more than 25% of target dose.
10, according to the method for one of claim 1-9, it is characterized in that, in the first time and radiation for the second time, select acceleration voltage and set dosage, make in binder composition A, on the direction of backing, forming the degree of depth/distribution of dose that rises or descend, influence its cohesiveness with controllable mode thus.
11, according to the method for claim 1 or 10, it is characterized in that, by selecting to have the light trigger of suitable wavelength, in the radiation first time, select UV radiating penetration depth, and in the radiation second time, select to be used for the acceleration voltage of electron beam and to set dosage, make in binder composition A, crosslinked distribution form constant on the direction of backing influences its cohesiveness with controllable mode thus.
12, according to the method for claim 1 or 4, it is characterized in that, by selecting to have the light trigger of suitable wavelength, in the radiation first time, select UV radiating penetration depth, and in the radiation second time, select to be used for the acceleration voltage of electron beam and to set dosage, make in binder composition A, on the direction of backing, forming the crosslinked distribution of rising or descending, influence its cohesiveness with controllable mode thus.
13, according to the method for claim 1 or 12, it is characterized in that, by selecting to have the light trigger of suitable wavelength, select the acceleration voltage that is used for electron beam in the radiation for the first time and set dosage, with the UV radiating penetration depth in the radiation second time, make in binder composition A, in the crosslinked distribution that on the direction of backing, forms constant.
14, according to the method for one of claim 1-13, the radiation dose that it is characterized in that gained in binder composition can reach 80kGy or more than, and can select the EB acceleration voltage of 40-350kV.
15, according to the method for one of claim 1-14, it is characterized in that the adhesive therefor composition can be acrylate and rubber, it is with solution or dispersion or the use of hot-melt adhesive composition form.
16,, it is characterized in that binder composition can be that fill, painted and/or foaming according to the method for one of claim 1-15.
17,, it is characterized in that the backing material that is adopted made by MOPP, BOPP, HDPE, LDPE, polyester, PVC, paper, non-woven fabrics or foam materials according to the method for one of claim 1-16.
18, a kind of method of backing material radiation crosslinking of double spread wherein adopts the backing material of various dose from anisopleual eradiation double spread in radiation devices.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006101389722A CN101100586A (en) | 2006-07-05 | 2006-07-05 | Electron beam and ultraviolet crosslinking for composition layer and products produced from the same layer |
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|---|---|---|---|
| CNA2006101389722A CN101100586A (en) | 2006-07-05 | 2006-07-05 | Electron beam and ultraviolet crosslinking for composition layer and products produced from the same layer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109952354A (en) * | 2016-11-15 | 2019-06-28 | 3M创新有限公司 | Adhesive article and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109952354A (en) * | 2016-11-15 | 2019-06-28 | 3M创新有限公司 | Adhesive article and preparation method thereof |
| CN109952354B (en) * | 2016-11-15 | 2021-10-01 | 3M创新有限公司 | Adhesive articles and methods of making the same |
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