CA1093366A - Acute angle separation of thermoplastic light sensitive laminates - Google Patents
Acute angle separation of thermoplastic light sensitive laminatesInfo
- Publication number
- CA1093366A CA1093366A CA283,748A CA283748A CA1093366A CA 1093366 A CA1093366 A CA 1093366A CA 283748 A CA283748 A CA 283748A CA 1093366 A CA1093366 A CA 1093366A
- Authority
- CA
- Canada
- Prior art keywords
- laminate
- film
- light
- cover film
- sensitive layer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C63/00—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor
- B29C63/0004—Component parts, details or accessories; Auxiliary operations
- B29C63/0013—Removing old coatings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C63/00—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor
- B29C63/02—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor using sheet or web-like material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B43/00—Operations specially adapted for layered products and not otherwise provided for, e.g. repairing; Apparatus therefor
- B32B43/006—Delaminating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/06—Interconnection of layers permitting easy separation
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/16—Coating processes; Apparatus therefor
- G03F7/161—Coating processes; Apparatus therefor using a previously coated surface, e.g. by stamping or by transfer lamination
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2367/00—Polyesters, e.g. PET, i.e. polyethylene terephthalate
Abstract
ABSTRACT OF THE DISCLOSURE
This invention relates to an improvement in the process for the separation of laminates usable as layer transfer materials, which are composed of a cover film, a carrier film and a thermoplastic light-sensitive layer enclosed between them, and the films of which exhibit identical or only slightly differing adhesion to the light-sensitive layer, the improvement comprising removing the cover film the laminates at an acute angle of deflection counter to the direction of the movement of the laminate. The invention also relate to an apparatus for performing the process.
This invention relates to an improvement in the process for the separation of laminates usable as layer transfer materials, which are composed of a cover film, a carrier film and a thermoplastic light-sensitive layer enclosed between them, and the films of which exhibit identical or only slightly differing adhesion to the light-sensitive layer, the improvement comprising removing the cover film the laminates at an acute angle of deflection counter to the direction of the movement of the laminate. The invention also relate to an apparatus for performing the process.
Description
336~ K-2470 The invention relates to a process ancl apparatus for the separa-tion of laminates, as used in reprography, for example as layer transfer materials .
Layer transfer materials frequently are used for the manufacture of printed circuits; they are composed, for example, of a light-sensitive layer (the so-called photoresist layer), which is enclosed between two films of different polymers, one acti.ng as the carrier film and one as the cover film. The films exhibit, as a rule, different adhesion to the light-sensitive layer and are in this way intended to permit controlle~
one-sided removal (delamination). The film which can be peeled off relatively more easily, or the film to be peeled off first, is the cover film, and the other is the carrier film. Such layer transfer materials, which are known in the trade under the designation dry resist films, are disclosed, for example, in DT-AS No. 1,522,515, DT-OS NoO
Layer transfer materials frequently are used for the manufacture of printed circuits; they are composed, for example, of a light-sensitive layer (the so-called photoresist layer), which is enclosed between two films of different polymers, one acti.ng as the carrier film and one as the cover film. The films exhibit, as a rule, different adhesion to the light-sensitive layer and are in this way intended to permit controlle~
one-sided removal (delamination). The film which can be peeled off relatively more easily, or the film to be peeled off first, is the cover film, and the other is the carrier film. Such layer transfer materials, which are known in the trade under the designation dry resist films, are disclosed, for example, in DT-AS No. 1,522,515, DT-OS NoO
2, 064, 080, and DT-OS No. 2, 205 ,146; the light-sensitive layer is usually a photopolymerizable layer.
The layer transfer is in general carried out by laminating the surface of the light-sensitive layer, exposed after removing the cover film, onto the final base, for example a copper/aluminum bimetallic plate or a plastic plate with a laminated copper skin, for example by warming and pressure.
After the laminate thus produced has been exposed to light, the carrier film is pulled off.
For the initially one-sided delamination required for the layer transfer it is necessar~, inter alia, that the adhesion of the cover~film be significantly less than that of the carrier film, but still sufficient to ~: : :
allow the production of a~ temporarily stable laminate which during :
~33~,~j; K~ 2 ~ 7 () s~oracle and processirL~l remaLns intact for clS l~ns as rlec~ess~ry ~o that, for ex~mple, no ~ne-sicled detachment of a filrn web nor any miyratory entry or inclusion of air or oxyc3en takes place. I'his is neceSsary be-cause th~ inclusion of (oxygen~containing) air leads, in the case of li~ht-sensitive photopolymer layers capable of addltion polymerization, .
to undesired side-reactions, i.e., to a.reduction of the light sensi-tivi-ty exhibited in practice.
For the delamination of the secorn~l film la.~,ter, required after laYer transfer and exposure, it is furthermore necessary that the adhe-sion of the carrier film to the light-sensitive layer be less than the - adhe`sion of the light-sensitive layer to -rnetallic bases, for examplebases of copper, the surfaces of which are intended to be covered with the light-sensitive layer in a manner which is in itself known and to be passed on to further modifying treatment stages. P. noticeable disadvan-tage of such a construction in connection with the known delamination and lamination technlques is, for example, the technically and commer-cially expensive necessity of using fikns with different adhesive properties, suited to the light-sensitive layer.
In practic~, at the present time, polyethylene is ~requently used as the.cover film and biaxially stretched polyethylene terephthalate as the carner film; :these films exhibit different adhesions to the known : ` ~
compositions of light-sensitive layers.
The polyethylene films employed originate primarily from the pack~aglng sector, in whlch;there is iinterest in inexpensive fllms, and are there~3re qualitativeLy usable only with limitations, because, for example, they :are~ elther~ not dimansionally s~able or of only llmited ~:
dlmens~ionaL stabiLity, in~ contrast to the polyethylene terephthalate films used as~carrler fllms, they are frequently of uneven thickness due , ~ , ': ' ~lC~3366 K -- 2 4 7 0 to included specl~s, and are furthermore o~ clifferin~J permeability to various gases ancl vapo~s. The disadvantages o'f these propertics are obvious to those skilled in the art. Even ~ith different adhesions of the carrier films and coverin~ films to the li~ht~-sensitive layer, for example with a difference of 5 ~/100 mm, delamination on the wrong side of the film easily can occur due to factors which determine the quality or prevail duriny manufac,ture, and this cannot be reliably pre-vented with the currently known delamination and lamination processes and machinery. Such factors inclucle, for example, specks pressed into -the resist layer, adheslons caused by a light-sensitive coating compo-sition exposed at the cut edges oE the roll, irregularities in cut at the ' edge of the roll, occurring during slitting, towards the end of the life of the cutter, and uneven winding or blocking'phenomena between the resist film webs on the roll. Accordingly, using the known lamina-tion and delamination devices, a light-sensitive layer enclosed between two films of the same type is even less capable of delamination in a controlled manner and on the correct side.
Apparatuses whlch can be used, for example, for applying a light-sensitive layer to the base to be laminated, 'namely so-called laminators, are in themselves known. The apparatuses disclosed in U. S. Patent No. 3,143,454, and U. S. Patent No. 3,309,983, are suitable, inter alia, for enclosing identity carriers between two heat-sealable film5 of the same type, the fllms being fed from two separate ~ . .
, rol~ls. ~Another embodlment of a laminator wi~th a special laminating roll construction is disclosed in U. S. Patent No. 3,401,439. Perfect .
delamination is readily possible only with laminates manufactured by means of such devices or similar devices, if 'the covering films and camer fiim~s exh}bit very different adhesions to the light-sensitive 1~33366 K - 2 ~17 0 klyer, i.e., if the adhesion of the carrier Eilm is at least twice as CJrCeat as tllat of the cover film.
If the apparatus accordin~ to U. S. Patent Mo. 3,401,~39, which is suitable for laminating, also is used for delaminating a lami-nate suitable for the la~er transEer of a light-sensitive layer, the sepa-ration of, for example, the polyoleEin cover film frorn the light-sensiti~e layer applied to polyester carrier film is effected by removing the cover film from the laminate in the running direction of the filrn. Perfect de-lamination is, in the case of this apparatus also, possible only if films of very different adhesion to the liyht-sensitive layer are present; fre-quently, blocking effects on the running~ and heating rolls, or other ad-verse adhesive forces of external origin, also occur in such cases.
An apparatus for coating a carrier material with a light-sensitive layer composed of a photopolymerizable material, present In the lami-nate ibetween a carrier layer and a cover layer, is known from U. S.
Patent No. 3,404,057. This apparatus exhibits,inter alia, a means for stripping the cover layer from the residual laminate composed of the : ~ :
- carrier layer and the light-sensitive layer. The stripping means, ad-vantageously a strlpping roll, are driven at a hiyher speed than the apparatus by means~ of whic~h the laminate is transported. Accordingly, ~ .
the delamination process occurs, in this apparatus, by a direction , change cau,sed by a~ roller, and as a resuit the dlfficulties already in-dicated again occur, so that only those laminates can ~e delaminated in wh~ch the cover film and carrier fllm possess different adhesion to the light-sensitive layer.
n~appardtus~for labelling cylindrical artiGles is~disclosed in ~
French patent~No. 1,~421,605. In this apparatu~s, ~self-adheslve labels, carr1ed~in a row on a carrlar strip, are separated from th3 carrier strip : .
... . : .... , ., -.
' ' ' ' '' '' ': ' ' . ' - ' ~' '. ' ' ~ ' ' ' 33;~
by passing the la-tter over a sharp edge of a separator plate. The object to be achieved is in a different technical field and starts from a different type of laminate, ~here only one of the c~ter layers must be peeled off during the entire processingt while the c~her, namely the label layer, always remains bonded to the adhesive, so -that the adhesion thereof to the adhesive is irrelevant rek~tive to the adhesion between the layer to be peeled off and the adhesive. Furthermore, the layer materials used in this laminate, such as paper, adhesive and release paper, differ substan-tially from the laminate materials to be separated iTl the case of the present invention, namely films and a light-sensitive cc~position.
Accordingly, it is a purpose of -the pre~ent invention to prc~vide a process and apparatus for the separation of laminates usable as a layer transfer material, which are ccmposed of a cover film, a carrier film and a thermoplastic light-sensitive layer enclosed between them, and in which both the cover film and the carrier film possess identical, or a~nost identi-cal, adhesion to the light-sensitive layer.
The invention starts frcm a process for the transfer of a thermo-pLastic light-sensitive layer enclosed in thie ~orm of a laminate between a temporary support film ar~ a cover film ~hich films exhibit identical or only slightly differing adhesions to the light-sensitive layer, to a perma-nent support, wherein the laminate is moved towards the permanent support, the cover film is removed from the laminate at an acute angle of deflection counter to the direction of movement of the lamlnate and, thereafter, the exposed surface of the therm~plastic layer is lam mated, with pressure, to the permanent support and the temporary support film is removed from the the~moplastic layer~ In a preferred embodim~nt of the process, the angle of deflection is ~ 40.
The invention also includes an apparatus for the transfer of a thermoplastic light-sensitive layer enclosed in the form of a laminate 3Q between a temporary s~port film and a cover film which films exhibit iden-tical or only slightly differmg adhesions to the light-sentitive layer, to a perm~nent support, camprising means for ~mwinding the lamlnate from a 16~33~, supply roll, sh~lrp~edged mEars for deflecting the cover film frc~l the lanuulate, mec~ns for varying the angle of deflection of the cover film ~rom the lamlnat,, means for winding up the r~lnoved cover film, and means for thereafter laminating with pressure the exposed surface of the thermoplastic layer to the permanent support.
In the appara~us~ the mec~ns for deflecting the cover f.ilm frcm the laminate are of sharp~e1ged construction c~d additio.ncllly possess means for the vc~ricible ætt.ung of the angle between the runmng direction of ~he laminate and the running direction of the removed cover film.
The invention will ke further illustrabed by reference to the accompanying drawings, in which:
Figure 1 schematically shows the essential process steps and the principles of the apparatus, Figure 2 shows a part of Figure 1 enlarged, Figure 3 shows a cross-section of an apparatus in which one of the possible arrangements of the principle of the process is realized, and Figures 4 and 5 show, in cross-section, the construction oE the deflection device as a deflection rod or wire.
The laminate 1, composed of a cover film, carriex film and light-sensitive layer arranged between them is passed (see Figure 1) underneath the deflection device 3. At the tip, of sharp-edge construction, of the deflection device which, if it is constructed as a wedge-shaped doctor blade, has th- cross-sectional shape of an acu~e-angled triangle, the cover film 2 is removed from the laminate b~ being . . .
33~ 2~0 cleElected ~round the sllarp ed~e, ~ hich Gption~llly also can be slightly rounded. The residual laminate ~1 is furtller led over a heatirlcJ shoe 5 and is laminated, between the transport roller 6 and the pressure roller 7, onto the base m-- terial 8, fvr example a plastic/copper sheet for the manufacture of printed circuits. The new laminate 9 then can be lecl to a further processing operation, In Figure 2, the part of the process or apparatus essential to the invention is clarified adciitionally b~ the enlargement. 1'he laminate 1 is moved, in the running direction 13, towards the broad end of the deElectiondevice 3, constructecl, forexample, as awedge-shaped doctor blade, and changes its direction oE runninCJ, at the lower edge of this broad end, to the direction 12, in order to ensure taut tension-ing of the laminate web. At the tip of the deflèction device, the cover film 2 is removed from the laminate by being deflected about this tip.
The angle of deflection can be set, by means of the adjustable settlng device 11, minimally to the angle of the tip of the deflection device, and maximally the angle advantageously should not exceed 40. The angle of deflection is to be understood as the angle between the runn-ing direction 12 of the laminate and the running direction 1'1 of the stripped-off cover film. The residual laminate oE the light-sensitive layer 15 and carrier fiLm 10 is, for example, passed on to the further :: :
use described above.~ ~
The apparatus shown in cross-section in Figure 3 realizes one of the possible arrangements of the principle of the process. The main c omponents of the device, shov~n in this Figure, are: the supply roll 17 with the wlnd-off core~l6, irom which~the lamlnate 1/ composed of the pair of films and the light-sensitive layer, is unwound; the cover film 2 ~s deflected about the wedge-shaped doctor blade 3 and thereby auto-matically removed from the laminate. The angle of deflection can be , ~
1~933~i K -- 2 ~17 0 v~riably controlled by ttle me~lns 11. The mean~ are intermecliate rolls ~or the transport of the corresponding strips. The cover film 2 is wound up as a roll 20 on the wind-up core 19; the wind-up cores 19 and 16 are connected to one another and to the transport roll 6 in suc'n a way as to ensure constant speed of the individual sections of the web rela-tive to one another. The residual laminate 'I composed of the light-sensitive layer and the carrier fil~m is laminated onto the base material 8, to be fed in, between the transport roller 6 and the pressure roller 7 Instead of the wedge-shaped cloctor blade used as a deflection device of sharp-edge construction, it is also possible to use a deflec-- tion rod 21, the diameter of which is not~more than 5 ~nm (see Figure ~).
A further embodiment of the invention provides that the separation of the laminate can be effected at a wire 22 tensioned across the width of the device (see Figure 5).
The process according to the invention, under certain conditions, also can be carried out by deflectin~ the covering film uniformly from the laminate without the use of a deflection means of sharp-edge con-struction. This is true in particular if the cover film is composed of the same polymer material as the carrier iilm, but is less thick. Pos-sibly the cause of this special effect is that the relatively thinner of the two films can be curved more easily or more strongly, i.e. the rad-ius of the semi-circle of curvature, formed at the~point of deflection of the covering film from the laminate, is relatively smaller. If, for ex-ample, the lamlnate is composed of a carrier film of poiyester havin~
a thickness of agout 23~, a light-sensitive layer having a thickness of about~25~and a coverfilm of polyester, having a thickness of about 8 to 15)i, preferahly of about lO to 13~, the cover film can be uniformly stripped from the laminate, without using a deflection device of sharp-edged construction, at an acute angle of deflection counter to the runnlng direction of the laminate.
1(39~3366 K - 2 ~17 0 The process accordiny to tl-le inve~ntion ancl the apparatus for this process are suitable for th~ sc~paration of laminates in general, b~lt especially of laminates constructed as layer transfer materials and compcsed of a pair of filrns and a thermoplastlc light-sensltive layer enclosed between them. In the simplest case, the pair oE films em-- ployed can be of different materials, such as are emplo~ed in the dry resist films currently available on the market. The process accordiny to the invention, and the apparatus, may be used particularly advan-tageously if it is intended to separate laminates whereof the pair of films possesses the same, or virtuall~ the same, adhesion to the - thermoplastic layer which they enclose.-Identical adhesion is encountered when the cover film and the carrier film are of the same material or if, thouyh the cover film and carrier film are different from one another, an identical adhesion-promotin~ pre-treatment is employed to optirnize their surface proper-ties, and the pretreated film surfaces are used to cover the thermo-plastic layer which is to be protected.
By using the process according to the invention it is possible, in a laminate, to effect the removal of a cover layer without damaging the intermediate layer, as a result of which the intermediate layer, for example a light-sensitive layer, remains adhering completely, i.e., with its entire surEace, to the carrier film.
The examples given below further illustrate the invention:
Example 1 ; ~
~ .
A 25~ thick polyethylene terephthalate film is coated with a mixture of a photomonomer (200 g) composed of the reaction product of 2,2,4-trimethyl-hexamethylene diisocyanate wi-th 2-hydroxyethyl ` ~ methacrylate, and a terpolymer (200 g) composed of n-hexyl 3336~ K - 2 ~17 0 methacryl.lte, methacrylic acid and ;Lyren~, to which the ~ollowiny substances are also adcled: 9-phenyl-acricline (6.15 g), Michler's ketone (0.46 ~J), triethylene ~lycol dimethacrylate (~1.6 y) and Sama~
rone Navy Blue HGL (1.07 g). The coatirls solution is first adjusted to a viscosity of 60 - 70 cST (at 25 C) by adding methyl ethyl ketone.
After drying the ~5~ thick light-sensitive layer at 130C, the cover film, the thickness and composition of which correspond to that of the carrier film used, is laminated-on.
In order to laminate the liyht-sensitive' layer onto the conduc-tor plate, one of the two polyester films is removed from the laminate by dèflection about the tip of a wedge-shaped doctor blade at an angle of deflection of 25 and the light-sensitive layer remaining on the other polyester film is -then applied to the conductor plate in the usual ma nner .
Example 2 The coating solution described below is applied to a 25 )3~ thick polyethylene terephthalate film and dried at 120C:
2.8 parts by weight of a terpolymer of methyl methacrylate, n-hexyl methacrylate and methacrylic acid (75 parts by weight: 375 parts by weight: 90 parts by weight), having an acid number of 209;
2 . 8 parts by l,veight of the photomonomer, containing urethane groups, described in Example i; 0.2 part by weight of 9-phenyl-acridine; 0.25 part by weight of triethylene glycol diacetate; 0.03 part by weight of tri-4-(3-methyl-phenylamino)-phenyl-methyl acetate and 30 parts by volume of ethylene glycol monoethyl ether.
' An approximately 25~1 thick polypropylene film, the adhesion of which does not differ~, or differs only slightly, from that of the carrier fllm (surface tension about 38 mN/m) lS then laminated onto the 25~, .
~ ~ - thick' light-sensitive layer and' the larninate is storecl in rolls.
~. ~ . . -~LO 33-~66 K - 2 ~ 7 0 To mallut~lcture circuit plates or the lilce, the pol~p~op~lens cover film is remove~d, by de~Lection about a rod of 3 mm diametcr, with an angle of clefl~ction of 15 , in such a way that the li~ht-sensitive layer remains aclherin~, over its entire surface, to the car~ier fil~n and can be further processed, to procluce circuit plates, in ~he usual rnann~3r with the aid of laminators.
~ , ' ' , Using a laminate composecl of a 25 ~l thick film of Chill Roll hi~h pressure polyethyl0ne having a mel-t index of 2 and a 25 ~ thic;~
film of polyethylene terephthalate, the 40~ thick li~ht-sensitive inter-- mediate layer, having the composition showrl below, r~ma~ns adhering partially to both films, or only to the polyester film, if the separating device according to the invention is not used, but is separated uniform-ly and over its entire surface when using th~ separating device accord-ing to Example 1, i~ the polyester film used as th0 cover film is de-ilected about the wedg0-shaped doctor blad0.
The coatlng solution has the following cornposition:
A copolymer of 37% styrene and 63% monobutyl maleate, molecular weight 20 OOO (67 g), trim0thyloIpropane triacrylate (22 g), tetraethylen0 glycol diacrylate (11 g), benzophenone (2.3 g), 4,~'-bis-(dimethyl-amino)-bsn~oph0non0 (0.3 g), 2,2'-methylene-bis-'(4-ethyl-6-tert.-- butylphenol) (0.1 g), Methyl Violet 2 B base (0.07 ~), benztrlazole (o.2n g) and methyl ethyl ketone (140.O g); the solution is dried at about 12 0 C .
Example ~
The procedure~ described in Example 3 is i'ollowed, except that Instead of the polyester~film, the polyethylene film is deflected from the Iarninate, a~out the ~doctor blade. The light-sensitive layer, which . : .
The layer transfer is in general carried out by laminating the surface of the light-sensitive layer, exposed after removing the cover film, onto the final base, for example a copper/aluminum bimetallic plate or a plastic plate with a laminated copper skin, for example by warming and pressure.
After the laminate thus produced has been exposed to light, the carrier film is pulled off.
For the initially one-sided delamination required for the layer transfer it is necessar~, inter alia, that the adhesion of the cover~film be significantly less than that of the carrier film, but still sufficient to ~: : :
allow the production of a~ temporarily stable laminate which during :
~33~,~j; K~ 2 ~ 7 () s~oracle and processirL~l remaLns intact for clS l~ns as rlec~ess~ry ~o that, for ex~mple, no ~ne-sicled detachment of a filrn web nor any miyratory entry or inclusion of air or oxyc3en takes place. I'his is neceSsary be-cause th~ inclusion of (oxygen~containing) air leads, in the case of li~ht-sensitive photopolymer layers capable of addltion polymerization, .
to undesired side-reactions, i.e., to a.reduction of the light sensi-tivi-ty exhibited in practice.
For the delamination of the secorn~l film la.~,ter, required after laYer transfer and exposure, it is furthermore necessary that the adhe-sion of the carrier film to the light-sensitive layer be less than the - adhe`sion of the light-sensitive layer to -rnetallic bases, for examplebases of copper, the surfaces of which are intended to be covered with the light-sensitive layer in a manner which is in itself known and to be passed on to further modifying treatment stages. P. noticeable disadvan-tage of such a construction in connection with the known delamination and lamination technlques is, for example, the technically and commer-cially expensive necessity of using fikns with different adhesive properties, suited to the light-sensitive layer.
In practic~, at the present time, polyethylene is ~requently used as the.cover film and biaxially stretched polyethylene terephthalate as the carner film; :these films exhibit different adhesions to the known : ` ~
compositions of light-sensitive layers.
The polyethylene films employed originate primarily from the pack~aglng sector, in whlch;there is iinterest in inexpensive fllms, and are there~3re qualitativeLy usable only with limitations, because, for example, they :are~ elther~ not dimansionally s~able or of only llmited ~:
dlmens~ionaL stabiLity, in~ contrast to the polyethylene terephthalate films used as~carrler fllms, they are frequently of uneven thickness due , ~ , ': ' ~lC~3366 K -- 2 4 7 0 to included specl~s, and are furthermore o~ clifferin~J permeability to various gases ancl vapo~s. The disadvantages o'f these propertics are obvious to those skilled in the art. Even ~ith different adhesions of the carrier films and coverin~ films to the li~ht~-sensitive layer, for example with a difference of 5 ~/100 mm, delamination on the wrong side of the film easily can occur due to factors which determine the quality or prevail duriny manufac,ture, and this cannot be reliably pre-vented with the currently known delamination and lamination processes and machinery. Such factors inclucle, for example, specks pressed into -the resist layer, adheslons caused by a light-sensitive coating compo-sition exposed at the cut edges oE the roll, irregularities in cut at the ' edge of the roll, occurring during slitting, towards the end of the life of the cutter, and uneven winding or blocking'phenomena between the resist film webs on the roll. Accordingly, using the known lamina-tion and delamination devices, a light-sensitive layer enclosed between two films of the same type is even less capable of delamination in a controlled manner and on the correct side.
Apparatuses whlch can be used, for example, for applying a light-sensitive layer to the base to be laminated, 'namely so-called laminators, are in themselves known. The apparatuses disclosed in U. S. Patent No. 3,143,454, and U. S. Patent No. 3,309,983, are suitable, inter alia, for enclosing identity carriers between two heat-sealable film5 of the same type, the fllms being fed from two separate ~ . .
, rol~ls. ~Another embodlment of a laminator wi~th a special laminating roll construction is disclosed in U. S. Patent No. 3,401,439. Perfect .
delamination is readily possible only with laminates manufactured by means of such devices or similar devices, if 'the covering films and camer fiim~s exh}bit very different adhesions to the light-sensitive 1~33366 K - 2 ~17 0 klyer, i.e., if the adhesion of the carrier Eilm is at least twice as CJrCeat as tllat of the cover film.
If the apparatus accordin~ to U. S. Patent Mo. 3,401,~39, which is suitable for laminating, also is used for delaminating a lami-nate suitable for the la~er transEer of a light-sensitive layer, the sepa-ration of, for example, the polyoleEin cover film frorn the light-sensiti~e layer applied to polyester carrier film is effected by removing the cover film from the laminate in the running direction of the filrn. Perfect de-lamination is, in the case of this apparatus also, possible only if films of very different adhesion to the liyht-sensitive layer are present; fre-quently, blocking effects on the running~ and heating rolls, or other ad-verse adhesive forces of external origin, also occur in such cases.
An apparatus for coating a carrier material with a light-sensitive layer composed of a photopolymerizable material, present In the lami-nate ibetween a carrier layer and a cover layer, is known from U. S.
Patent No. 3,404,057. This apparatus exhibits,inter alia, a means for stripping the cover layer from the residual laminate composed of the : ~ :
- carrier layer and the light-sensitive layer. The stripping means, ad-vantageously a strlpping roll, are driven at a hiyher speed than the apparatus by means~ of whic~h the laminate is transported. Accordingly, ~ .
the delamination process occurs, in this apparatus, by a direction , change cau,sed by a~ roller, and as a resuit the dlfficulties already in-dicated again occur, so that only those laminates can ~e delaminated in wh~ch the cover film and carrier fllm possess different adhesion to the light-sensitive layer.
n~appardtus~for labelling cylindrical artiGles is~disclosed in ~
French patent~No. 1,~421,605. In this apparatu~s, ~self-adheslve labels, carr1ed~in a row on a carrlar strip, are separated from th3 carrier strip : .
... . : .... , ., -.
' ' ' ' '' '' ': ' ' . ' - ' ~' '. ' ' ~ ' ' ' 33;~
by passing the la-tter over a sharp edge of a separator plate. The object to be achieved is in a different technical field and starts from a different type of laminate, ~here only one of the c~ter layers must be peeled off during the entire processingt while the c~her, namely the label layer, always remains bonded to the adhesive, so -that the adhesion thereof to the adhesive is irrelevant rek~tive to the adhesion between the layer to be peeled off and the adhesive. Furthermore, the layer materials used in this laminate, such as paper, adhesive and release paper, differ substan-tially from the laminate materials to be separated iTl the case of the present invention, namely films and a light-sensitive cc~position.
Accordingly, it is a purpose of -the pre~ent invention to prc~vide a process and apparatus for the separation of laminates usable as a layer transfer material, which are ccmposed of a cover film, a carrier film and a thermoplastic light-sensitive layer enclosed between them, and in which both the cover film and the carrier film possess identical, or a~nost identi-cal, adhesion to the light-sensitive layer.
The invention starts frcm a process for the transfer of a thermo-pLastic light-sensitive layer enclosed in thie ~orm of a laminate between a temporary support film ar~ a cover film ~hich films exhibit identical or only slightly differing adhesions to the light-sensitive layer, to a perma-nent support, wherein the laminate is moved towards the permanent support, the cover film is removed from the laminate at an acute angle of deflection counter to the direction of movement of the lamlnate and, thereafter, the exposed surface of the therm~plastic layer is lam mated, with pressure, to the permanent support and the temporary support film is removed from the the~moplastic layer~ In a preferred embodim~nt of the process, the angle of deflection is ~ 40.
The invention also includes an apparatus for the transfer of a thermoplastic light-sensitive layer enclosed in the form of a laminate 3Q between a temporary s~port film and a cover film which films exhibit iden-tical or only slightly differmg adhesions to the light-sentitive layer, to a perm~nent support, camprising means for ~mwinding the lamlnate from a 16~33~, supply roll, sh~lrp~edged mEars for deflecting the cover film frc~l the lanuulate, mec~ns for varying the angle of deflection of the cover film ~rom the lamlnat,, means for winding up the r~lnoved cover film, and means for thereafter laminating with pressure the exposed surface of the thermoplastic layer to the permanent support.
In the appara~us~ the mec~ns for deflecting the cover f.ilm frcm the laminate are of sharp~e1ged construction c~d additio.ncllly possess means for the vc~ricible ætt.ung of the angle between the runmng direction of ~he laminate and the running direction of the removed cover film.
The invention will ke further illustrabed by reference to the accompanying drawings, in which:
Figure 1 schematically shows the essential process steps and the principles of the apparatus, Figure 2 shows a part of Figure 1 enlarged, Figure 3 shows a cross-section of an apparatus in which one of the possible arrangements of the principle of the process is realized, and Figures 4 and 5 show, in cross-section, the construction oE the deflection device as a deflection rod or wire.
The laminate 1, composed of a cover film, carriex film and light-sensitive layer arranged between them is passed (see Figure 1) underneath the deflection device 3. At the tip, of sharp-edge construction, of the deflection device which, if it is constructed as a wedge-shaped doctor blade, has th- cross-sectional shape of an acu~e-angled triangle, the cover film 2 is removed from the laminate b~ being . . .
33~ 2~0 cleElected ~round the sllarp ed~e, ~ hich Gption~llly also can be slightly rounded. The residual laminate ~1 is furtller led over a heatirlcJ shoe 5 and is laminated, between the transport roller 6 and the pressure roller 7, onto the base m-- terial 8, fvr example a plastic/copper sheet for the manufacture of printed circuits. The new laminate 9 then can be lecl to a further processing operation, In Figure 2, the part of the process or apparatus essential to the invention is clarified adciitionally b~ the enlargement. 1'he laminate 1 is moved, in the running direction 13, towards the broad end of the deElectiondevice 3, constructecl, forexample, as awedge-shaped doctor blade, and changes its direction oE runninCJ, at the lower edge of this broad end, to the direction 12, in order to ensure taut tension-ing of the laminate web. At the tip of the deflèction device, the cover film 2 is removed from the laminate by being deflected about this tip.
The angle of deflection can be set, by means of the adjustable settlng device 11, minimally to the angle of the tip of the deflection device, and maximally the angle advantageously should not exceed 40. The angle of deflection is to be understood as the angle between the runn-ing direction 12 of the laminate and the running direction 1'1 of the stripped-off cover film. The residual laminate oE the light-sensitive layer 15 and carrier fiLm 10 is, for example, passed on to the further :: :
use described above.~ ~
The apparatus shown in cross-section in Figure 3 realizes one of the possible arrangements of the principle of the process. The main c omponents of the device, shov~n in this Figure, are: the supply roll 17 with the wlnd-off core~l6, irom which~the lamlnate 1/ composed of the pair of films and the light-sensitive layer, is unwound; the cover film 2 ~s deflected about the wedge-shaped doctor blade 3 and thereby auto-matically removed from the laminate. The angle of deflection can be , ~
1~933~i K -- 2 ~17 0 v~riably controlled by ttle me~lns 11. The mean~ are intermecliate rolls ~or the transport of the corresponding strips. The cover film 2 is wound up as a roll 20 on the wind-up core 19; the wind-up cores 19 and 16 are connected to one another and to the transport roll 6 in suc'n a way as to ensure constant speed of the individual sections of the web rela-tive to one another. The residual laminate 'I composed of the light-sensitive layer and the carrier fil~m is laminated onto the base material 8, to be fed in, between the transport roller 6 and the pressure roller 7 Instead of the wedge-shaped cloctor blade used as a deflection device of sharp-edge construction, it is also possible to use a deflec-- tion rod 21, the diameter of which is not~more than 5 ~nm (see Figure ~).
A further embodiment of the invention provides that the separation of the laminate can be effected at a wire 22 tensioned across the width of the device (see Figure 5).
The process according to the invention, under certain conditions, also can be carried out by deflectin~ the covering film uniformly from the laminate without the use of a deflection means of sharp-edge con-struction. This is true in particular if the cover film is composed of the same polymer material as the carrier iilm, but is less thick. Pos-sibly the cause of this special effect is that the relatively thinner of the two films can be curved more easily or more strongly, i.e. the rad-ius of the semi-circle of curvature, formed at the~point of deflection of the covering film from the laminate, is relatively smaller. If, for ex-ample, the lamlnate is composed of a carrier film of poiyester havin~
a thickness of agout 23~, a light-sensitive layer having a thickness of about~25~and a coverfilm of polyester, having a thickness of about 8 to 15)i, preferahly of about lO to 13~, the cover film can be uniformly stripped from the laminate, without using a deflection device of sharp-edged construction, at an acute angle of deflection counter to the runnlng direction of the laminate.
1(39~3366 K - 2 ~17 0 The process accordiny to tl-le inve~ntion ancl the apparatus for this process are suitable for th~ sc~paration of laminates in general, b~lt especially of laminates constructed as layer transfer materials and compcsed of a pair of filrns and a thermoplastlc light-sensltive layer enclosed between them. In the simplest case, the pair oE films em-- ployed can be of different materials, such as are emplo~ed in the dry resist films currently available on the market. The process accordiny to the invention, and the apparatus, may be used particularly advan-tageously if it is intended to separate laminates whereof the pair of films possesses the same, or virtuall~ the same, adhesion to the - thermoplastic layer which they enclose.-Identical adhesion is encountered when the cover film and the carrier film are of the same material or if, thouyh the cover film and carrier film are different from one another, an identical adhesion-promotin~ pre-treatment is employed to optirnize their surface proper-ties, and the pretreated film surfaces are used to cover the thermo-plastic layer which is to be protected.
By using the process according to the invention it is possible, in a laminate, to effect the removal of a cover layer without damaging the intermediate layer, as a result of which the intermediate layer, for example a light-sensitive layer, remains adhering completely, i.e., with its entire surEace, to the carrier film.
The examples given below further illustrate the invention:
Example 1 ; ~
~ .
A 25~ thick polyethylene terephthalate film is coated with a mixture of a photomonomer (200 g) composed of the reaction product of 2,2,4-trimethyl-hexamethylene diisocyanate wi-th 2-hydroxyethyl ` ~ methacrylate, and a terpolymer (200 g) composed of n-hexyl 3336~ K - 2 ~17 0 methacryl.lte, methacrylic acid and ;Lyren~, to which the ~ollowiny substances are also adcled: 9-phenyl-acricline (6.15 g), Michler's ketone (0.46 ~J), triethylene ~lycol dimethacrylate (~1.6 y) and Sama~
rone Navy Blue HGL (1.07 g). The coatirls solution is first adjusted to a viscosity of 60 - 70 cST (at 25 C) by adding methyl ethyl ketone.
After drying the ~5~ thick light-sensitive layer at 130C, the cover film, the thickness and composition of which correspond to that of the carrier film used, is laminated-on.
In order to laminate the liyht-sensitive' layer onto the conduc-tor plate, one of the two polyester films is removed from the laminate by dèflection about the tip of a wedge-shaped doctor blade at an angle of deflection of 25 and the light-sensitive layer remaining on the other polyester film is -then applied to the conductor plate in the usual ma nner .
Example 2 The coating solution described below is applied to a 25 )3~ thick polyethylene terephthalate film and dried at 120C:
2.8 parts by weight of a terpolymer of methyl methacrylate, n-hexyl methacrylate and methacrylic acid (75 parts by weight: 375 parts by weight: 90 parts by weight), having an acid number of 209;
2 . 8 parts by l,veight of the photomonomer, containing urethane groups, described in Example i; 0.2 part by weight of 9-phenyl-acridine; 0.25 part by weight of triethylene glycol diacetate; 0.03 part by weight of tri-4-(3-methyl-phenylamino)-phenyl-methyl acetate and 30 parts by volume of ethylene glycol monoethyl ether.
' An approximately 25~1 thick polypropylene film, the adhesion of which does not differ~, or differs only slightly, from that of the carrier fllm (surface tension about 38 mN/m) lS then laminated onto the 25~, .
~ ~ - thick' light-sensitive layer and' the larninate is storecl in rolls.
~. ~ . . -~LO 33-~66 K - 2 ~ 7 0 To mallut~lcture circuit plates or the lilce, the pol~p~op~lens cover film is remove~d, by de~Lection about a rod of 3 mm diametcr, with an angle of clefl~ction of 15 , in such a way that the li~ht-sensitive layer remains aclherin~, over its entire surface, to the car~ier fil~n and can be further processed, to procluce circuit plates, in ~he usual rnann~3r with the aid of laminators.
~ , ' ' , Using a laminate composecl of a 25 ~l thick film of Chill Roll hi~h pressure polyethyl0ne having a mel-t index of 2 and a 25 ~ thic;~
film of polyethylene terephthalate, the 40~ thick li~ht-sensitive inter-- mediate layer, having the composition showrl below, r~ma~ns adhering partially to both films, or only to the polyester film, if the separating device according to the invention is not used, but is separated uniform-ly and over its entire surface when using th~ separating device accord-ing to Example 1, i~ the polyester film used as th0 cover film is de-ilected about the wedg0-shaped doctor blad0.
The coatlng solution has the following cornposition:
A copolymer of 37% styrene and 63% monobutyl maleate, molecular weight 20 OOO (67 g), trim0thyloIpropane triacrylate (22 g), tetraethylen0 glycol diacrylate (11 g), benzophenone (2.3 g), 4,~'-bis-(dimethyl-amino)-bsn~oph0non0 (0.3 g), 2,2'-methylene-bis-'(4-ethyl-6-tert.-- butylphenol) (0.1 g), Methyl Violet 2 B base (0.07 ~), benztrlazole (o.2n g) and methyl ethyl ketone (140.O g); the solution is dried at about 12 0 C .
Example ~
The procedure~ described in Example 3 is i'ollowed, except that Instead of the polyester~film, the polyethylene film is deflected from the Iarninate, a~out the ~doctor blade. The light-sensitive layer, which . : .
3~
withc)ut deflection remains aclhering partially to both films, separates, over its entire surfaee, frc~ the polyethylene film and remains firmly bc~ded to the polyester film. The separation is effected at a speed of the film web of 2 m/min., and the subsequent lamination of the light sensitive layer onto the copper surface o~ the eircuit plate rnaterial takes plaee at the same speed. After exposure to liyht, through the polyester film, of the light~sensitive layer applied to cc)ppert the covering polyester film was easily peeled off without demaging the light-sensitive layer.
Example 5 A 23~ thiek polyester film onto whieh a 25~ thiek light-sensitive layer of the eampositic)n shc~n below is applied, the layer subsequently being dried at about 130C, is laninated with a polyester film which is 12~ thiek but has the same chemieal ec~mpositisn as the first-mentioned film, and the laminate is wo~d up.
me eoating solution used is a mixture of a photomonc)mer (200 g), eamposed of the reaction produet of 2,2,4-trimethyl-hexamethylene diisc~yanate with 2-hydroxyethyl methacrylate, and a terpolymer (200 g) ccmposed of n-hexyl methaerylate, methacrylic acid and styrene;
this mixture furthermore eontains 6.15 g of 9-phenylaeridine, 0.46 g of Mi~ehler's ketone, 4.6 g of triethylene glycol dimethaerylate and 1.07 g of Samarone Navy Blue HCL. The coating solutisn is first adjusted to a viscosity of 60 - 70 csr (at 25 &) by adding methyl ethyl ketone.
The cover film and the eæ rier film are biaxially stretched poly-ethylene terephthalate film conforming to the UD~ (Assoeiation of Gbrman Eleetrieal Engineers) standards for insulating materials No. 0304 (1959) and 0345 11969), the film being of optieal quality ~ith not more than 1 to 2 more highly ecndensed partieles (speeks) no longer detectable ~ith the naked eye, of less than 0.5 mm K-2~Y0 ~3.~66 E~ per m2, and not more th;ln 30 opticall~ norl-objectionabLe bubbles, of less than 0.5 mm 0' per m . The tensile strenyth of the film is 170 N/mm2 in the longituclinal and transverse dir~ctions, the eLongation at break is greater than 60% in both directions, and the shrinkage i-s about 2% in the Longitudinal ancl transverse directions at 150/15 minutes.
It will be obvious to those skilled in the art that many modifi-cations may be rnade within the scope of the present invention without departing from the spirit thereof, ancl the invention includes all such modifica tions .
.
: . ' .
:~:
~ 2 0 ~ ~ .
:
~ . : .
. ~
:: ~: :
withc)ut deflection remains aclhering partially to both films, separates, over its entire surfaee, frc~ the polyethylene film and remains firmly bc~ded to the polyester film. The separation is effected at a speed of the film web of 2 m/min., and the subsequent lamination of the light sensitive layer onto the copper surface o~ the eircuit plate rnaterial takes plaee at the same speed. After exposure to liyht, through the polyester film, of the light~sensitive layer applied to cc)ppert the covering polyester film was easily peeled off without demaging the light-sensitive layer.
Example 5 A 23~ thiek polyester film onto whieh a 25~ thiek light-sensitive layer of the eampositic)n shc~n below is applied, the layer subsequently being dried at about 130C, is laninated with a polyester film which is 12~ thiek but has the same chemieal ec~mpositisn as the first-mentioned film, and the laminate is wo~d up.
me eoating solution used is a mixture of a photomonc)mer (200 g), eamposed of the reaction produet of 2,2,4-trimethyl-hexamethylene diisc~yanate with 2-hydroxyethyl methacrylate, and a terpolymer (200 g) ccmposed of n-hexyl methaerylate, methacrylic acid and styrene;
this mixture furthermore eontains 6.15 g of 9-phenylaeridine, 0.46 g of Mi~ehler's ketone, 4.6 g of triethylene glycol dimethaerylate and 1.07 g of Samarone Navy Blue HCL. The coating solutisn is first adjusted to a viscosity of 60 - 70 csr (at 25 &) by adding methyl ethyl ketone.
The cover film and the eæ rier film are biaxially stretched poly-ethylene terephthalate film conforming to the UD~ (Assoeiation of Gbrman Eleetrieal Engineers) standards for insulating materials No. 0304 (1959) and 0345 11969), the film being of optieal quality ~ith not more than 1 to 2 more highly ecndensed partieles (speeks) no longer detectable ~ith the naked eye, of less than 0.5 mm K-2~Y0 ~3.~66 E~ per m2, and not more th;ln 30 opticall~ norl-objectionabLe bubbles, of less than 0.5 mm 0' per m . The tensile strenyth of the film is 170 N/mm2 in the longituclinal and transverse dir~ctions, the eLongation at break is greater than 60% in both directions, and the shrinkage i-s about 2% in the Longitudinal ancl transverse directions at 150/15 minutes.
It will be obvious to those skilled in the art that many modifi-cations may be rnade within the scope of the present invention without departing from the spirit thereof, ancl the invention includes all such modifica tions .
.
: . ' .
:~:
~ 2 0 ~ ~ .
:
~ . : .
. ~
:: ~: :
Claims (6)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A process for the transfer of a thermoplastic light-sensitive layer enclosed in the form of a laminate between a temporary support film and a cover film which films exhibit identical or only slightly differing adhesions to the light-sensitive layer, to a permanent support, wherein the laminate is moved towards the permanent support, the cover film is removed from the laminate at an acute angle of deflection counter to the direction of movement of the laminate and, thereafter, the exposed surface of the thermoplastic layer is laminated, with pressure, to the permanent support and the temporary support film is removed from the thermoplastic layer.
2. A process according to claim 1 in which the angle of deflection is ? 40 .
3. An apparatus for the transfer of a thermoplastic light-sensitive layer enclosed in the form of a laminate between a temporary support film and a cover film which films exhibit identical or only slightly differing adhesions to the light-sensitive layer, to a permanent support, comprising and for unwinding the laminate from a supply roll, sharp-edged means for deflecting the cover film from the laminate, means for varying the angle of deflection of the cover film from the laminate, means for winding up the removed cover film, and means for thereafter laminating with pressure the exposed surface of the thermoplastic layer to the permanent support.
4. An apparatus according to claim 3 in which said sharp-edged means is a wedge-shaped doctor blade.
5. An apparatus according to claim 3 in which said sharp-edged means is a deflection rod.
6. An apparatus according to claim 3 in which said sharp-edged means is a wire.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19762634560 DE2634560A1 (en) | 1976-07-31 | 1976-07-31 | METHOD AND DEVICE FOR DISCONNECTING CONNECTED |
| DEP2634560.8 | 1976-07-31 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1093366A true CA1093366A (en) | 1981-01-13 |
Family
ID=5984443
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA283,748A Expired CA1093366A (en) | 1976-07-31 | 1977-07-29 | Acute angle separation of thermoplastic light sensitive laminates |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JPS5317334A (en) |
| BE (1) | BE857280A (en) |
| CA (1) | CA1093366A (en) |
| DE (1) | DE2634560A1 (en) |
| GB (1) | GB1588780A (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4378264A (en) * | 1980-05-27 | 1983-03-29 | E. I. Du Pont De Nemours And Company | Integrated laminating process |
| DE3339723A1 (en) * | 1983-11-03 | 1985-05-23 | Löhr & Herrmann Ingenieurgesellschaft mbH, 7531 Neuhausen | Method and device for removing the protective film from laminated printed-circuit boards |
| DE3576900D1 (en) * | 1985-12-30 | 1990-05-03 | Ibm Deutschland | METHOD FOR PRODUCING PRINTED CIRCUITS. |
| DE4127601A1 (en) * | 1991-08-21 | 1993-02-25 | Hoechst Ag | REMOVAL DEVICE FOR A FILM LAMINATED ON A CARRIER MATERIAL |
| DE4201267A1 (en) * | 1992-01-18 | 1993-07-22 | Aristo Graphic Systeme | Method for applying transfer - uses two frames holding rollers and positioned selectively for gradual removal or foil remainder |
| US5605596A (en) * | 1995-02-06 | 1997-02-25 | The Goodyear Tire & Rubber Company | Dual gumstrip applicator for tire cord belts |
| US20020195198A1 (en) * | 2001-06-25 | 2002-12-26 | Ledak Stephen M. | Sheet lamination with angular separation of carrier |
| CN110676207B (en) * | 2019-09-27 | 2021-11-16 | 云谷（固安）科技有限公司 | Separation device and separation method |
-
1976
- 1976-07-31 DE DE19762634560 patent/DE2634560A1/en not_active Ceased
-
1977
- 1977-07-28 BE BE179748A patent/BE857280A/en not_active IP Right Cessation
- 1977-07-28 GB GB31744/77A patent/GB1588780A/en not_active Expired
- 1977-07-29 CA CA283,748A patent/CA1093366A/en not_active Expired
- 1977-07-29 JP JP9132177A patent/JPS5317334A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| BE857280A (en) | 1978-01-30 |
| GB1588780A (en) | 1981-04-29 |
| DE2634560A1 (en) | 1978-02-02 |
| JPS5317334A (en) | 1978-02-17 |
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