WO2015018992A1 - Structure en couches fonctionnalisee - Google Patents
Structure en couches fonctionnalisee Download PDFInfo
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- WO2015018992A1 WO2015018992A1 PCT/FR2014/051690 FR2014051690W WO2015018992A1 WO 2015018992 A1 WO2015018992 A1 WO 2015018992A1 FR 2014051690 W FR2014051690 W FR 2014051690W WO 2015018992 A1 WO2015018992 A1 WO 2015018992A1
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- layer
- film
- polarizing
- structure according
- adhesive
- Prior art date
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Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
- G02B5/3025—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state
- G02B5/3033—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state in the form of a thin sheet or foil, e.g. Polaroid
-
- 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
- B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
-
- 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
- B32B23/00—Layered products comprising a layer of cellulosic plastic substances, i.e. substances obtained by chemical modification of cellulose, e.g. cellulose ethers, cellulose esters, viscose
- B32B23/04—Layered products comprising a layer of cellulosic plastic substances, i.e. substances obtained by chemical modification of cellulose, e.g. cellulose ethers, cellulose esters, viscose comprising such cellulosic plastic substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B23/08—Layered products comprising a layer of cellulosic plastic substances, i.e. substances obtained by chemical modification of cellulose, e.g. cellulose ethers, cellulose esters, viscose comprising such cellulosic plastic substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
-
- 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
- B32B23/00—Layered products comprising a layer of cellulosic plastic substances, i.e. substances obtained by chemical modification of cellulose, e.g. cellulose ethers, cellulose esters, viscose
- B32B23/20—Layered products comprising a layer of cellulosic plastic substances, i.e. substances obtained by chemical modification of cellulose, e.g. cellulose ethers, cellulose esters, viscose comprising esters
-
- 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
- B32B27/08—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 of synthetic resin
-
- 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
- B32B27/16—Layered products comprising a layer of synthetic resin specially treated, e.g. irradiated
-
- 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
- B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
- B32B27/306—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising vinyl acetate or vinyl alcohol (co)polymers
-
- 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
- B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
- B32B27/308—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising acrylic (co)polymers
-
- 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
- B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
- B32B27/325—Layered products comprising a layer of synthetic resin comprising polyolefins comprising polycycloolefins
-
- 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
- B32B27/34—Layered products comprising a layer of synthetic resin comprising polyamides
-
- 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
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
- B32B27/365—Layered products comprising a layer of synthetic resin comprising polyesters comprising polycarbonates
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/08—Optical elements characterised by the material of which they are made; Optical coatings for optical elements made of polarising materials
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
- G02B1/14—Protective coatings, e.g. hard coatings
-
- G—PHYSICS
- G02—OPTICS
- G02C—SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES
- G02C7/00—Optical parts
- G02C7/12—Polarisers
-
- 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
- B32B2255/00—Coating on the layer surface
- B32B2255/10—Coating on the layer surface on synthetic resin layer or on natural or synthetic rubber layer
-
- 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
- B32B2255/00—Coating on the layer surface
- B32B2255/26—Polymeric coating
-
- 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
- B32B2307/00—Properties of the layers or laminate
- B32B2307/40—Properties of the layers or laminate having particular optical properties
- B32B2307/42—Polarizing, birefringent, filtering
-
- 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
- B32B2551/00—Optical elements
Definitions
- the invention relates to a functionalized layered structure. It also relates to a functionalized layer structure comprising one or more functionalized films, associated or not with a basic optical element.
- the basic optical element may be, in particular, an ophthalmic lens.
- the invention is particularly advantageous in the case where the functionalized layer structure has a polarization functionality.
- polarizing films are generally based on polyvinyl alcohol (PVA) or polyethylene terephthalate (PET).
- the (PVA) films are generally interposed between two protective films which are in particular based on cellulose triacetate (TAC) or polycarbonate (PC), or cycloolefin copolymer (COC).
- TAC cellulose triacetate
- PC polycarbonate
- COC cycloolefin copolymer
- This protective film makes it possible to protect the polarizing film against external mechanical stresses when it is assembled with the basic optical element or finished glass, for example by involuntary tearing, scratching or diffusion of a foreign substance into the material.
- the protective film facilitates handling during the manufacturing cycle of the polarizing optical element.
- these protective films also make it possible to protect the latter against external aggression, the PVA having in particular a hygroscopic behavior.
- FIG. 1A illustrates a layered structure 1 comprising a polarizing film 4 according to the prior art, composed of a TAC 2A protective film, a PVA-based adhesive layer 7A, a PVA polarization film 4, a second layer of glue 7B and a second TAC 2B protective film.
- Figure 1B shows an assembly between the layered structure 1 of the prior art and a basic optical element 100 for producing a polarizing optical element.
- One of the faces of the polarizing layer structure 1, corresponding to the free face of one of the two protective films 2B, is bonded to the optical surface of the base optical element 100 by means of a layer of adhesive 101.
- the polarizing basic optical element can then be varnished and then cut off so that its contour is adapted to the shape of the frame that receives it.
- the varnishing step may comprise surface preparations in the presence of water.
- the peripheral machining step can implement a standard method comprising at least one grinding step in which the lens is subjected to mechanical stresses in the presence of water.
- the polarizing layer structure as described above does not support such conditions (surface preparation, machining) which generally results in detachments at the interfaces of the layers.
- the PVA-based glue which gives a good adhesion between the polarizing film and the protective films is unfortunately soluble in water and the assembly TAC // glue // PVA / glue // film separates most of time during the stages comprising water, such as the steps of preparation of surfaces before varnish, or following a mechanical effort in the presence of water (clipping).
- An object of the present invention is therefore to provide a functionalized layer structure comprising at least one functionalized film, which can be implemented simply, while giving the structure a strong and durable adhesion during the successive stages of manufacture of the optical element, and especially the ophthalmic lens, especially when using post-treatment in the presence of water, (example: surface preparation, varnish, ophthalmic lens trimming).
- the invention proposes a functionalized layer structure comprising
- a first element representing a first monolayer or multilayer functional film
- the surfaces of said first element and second element intended to be brought into contact with said at least one layer of adhesive are subjected, prior to contacting, to a surface treatment so that the decrease between the peel force in dry condition and the peel force in wet condition is at least 35% or less inclusive.
- the surfaces of said first element and second element having been subjected to a surface treatment have a surface energy of at least 60 mN / m.
- the surface treatment is carried out a plasma treatment in inert nitrogen atmosphere, with a dosage of 40 to 100 W.min / m 2.
- the surface treatment is a corona treatment carried out in ambient air, with a dosage of 40 to 50 W.min / m 2.
- the first element represents a multilayer functional film, in which at least two layers are assembled by means of a layer of pressure-sensitive adhesive, the surfaces of the said at least two layers are subjected, prior to their assembly. to a surface treatment.
- the first element represents a functional film comprising at least one functionality chosen from among hue, polarization, photochromic, electrochromic, shockproof, anti-abrasion, antistatic, antireflection, anti-fouling, antifog, anti-rain, spectral filter on a band of determined wavelength, for example a blue light filter.
- the first element is a polarizing multilayer film comprising at least two films, respectively representing a polarizing film and a protective film.
- the polarizing film and the protective film are then assembled by means of a first layer of pressure-sensitive adhesive.
- the second element is a basic optical element.
- the second element is a second functional film such as a protective film.
- the structure further comprises a second second element representing a basic optical element, said second second element being brought into contact with the first second element, by means of a second layer of adhesive.
- this second adhesive layer is a layer of pressure-sensitive adhesive as defined above or an adhesive comprising at least one layer of adhesive material chosen from a layer of latex and a layer of adhesive material hot melt (HMA).
- said second adhesive layer is a pressure-sensitive adhesive layer.
- said second adhesive layer, selected as a pressure-sensitive adhesive layer is further selected to be identical to said first pressure-sensitive adhesive layer, i.e. to say of the same chemical composition.
- the structure defining a polarization functionality comprises: a first element representing a protective film and a polarizing film,
- a second element comprising a protective film
- the protective film prevents the polarizing film from being degraded and facilitates the manipulation of the polarizing structure. This makes it possible to better preserve the polarizing film when the latter is not yet applied against a basic optical element or when it is applied to the optical element when the glass is worn.
- This protective film may be based on cellulose triacetate (TAC), cellulose acetate butyrate (CAB), polyethylene terephthalate (PET), polycarbonate, polyamide, cycloolefin copolymer (COC) or cycloolefin polymer (COP).
- TAC cellulose triacetate
- CAB cellulose acetate butyrate
- PET polyethylene terephthalate
- COC cycloolefin copolymer
- COP cycloolefin polymer
- this layered structure comprising a polarizing film is also called a polarizing structure.
- the use of pressure-sensitive adhesive material or PSA "Pressure Sensitive Adhesive" for bonding the PVA polarizing film with a TAC protective film and plasma or corona treatment is particularly advantageous compared to a conventional structure because it makes it possible to produce the polarizing structure in a simple manner while preserving the polarization quality of the polarizing film. Furthermore, it is remarkable that the specific combination of this adhesive material with a plasma-like surface treatment with a well-adjusted dosage of the surface energies of the films makes it possible to create strong bonds at the interfaces of the films and to guarantee strong cohesion. within the structure, and that cohesion is preserved even in the presence of water.
- the inventors have found that it is necessary to maximize the surface energy of the films, so that there is effective cooperation between the surface treatment and the adhesive material (PSA) interposed between the treated surfaces. They have found that this cooperation is effective when the polarizing structure has a decrease between the peel force in dry condition and the wet peel force of less than 35%.
- This new polarizing structure makes it possible to avoid the phenomenon of separation between the polarizing film and the protective film during the trimming of a polarizing optical element provided with such a structure as well as during the surface preparation steps for varnish deposit.
- pressure-sensitive adhesive does not require the use of ultraviolet radiation or intensive heating to achieve permanent bonding.
- the polarizing film is not altered or degraded by such irradiation or heating.
- the polarizing film has a treated surface energy of at least 56 mN / m 2 and the protective film has a surface energy when treated of at least 46 mN / m 2.
- the polarizing structure comprises a single protective film disposed on one side of the polarizing film, the face of the polarizing film opposite to said protective film being covered by a conditioning film or not.
- the pressure-sensitive adhesive material is preferably a polyacrylate-based compound.
- the pressure-sensitive adhesive layer has a thickness of between 5 ⁇ and 150 ⁇ , preferably between 10 and 50 ⁇ in order to ensure effective bonding while maintaining a uniform thickness.
- the polarizing film is based on polyvinyl alcohol (PVA), with a thickness typically between 20 ⁇ ⁇ .
- PVA polyvinyl alcohol
- it may be based on polyethylene terephthalate or PET with a thickness typically between 15 and 100 ⁇ .
- the method of producing a polarizing structure as described above comprises the following steps:
- This method further comprises an additional step before step c) in which the surfaces of said films intended to be brought into contact with said pressure-sensitive adhesive layer are subjected, prior to contact, to a surface treatment so that that the decrease between the peel force in dry condition and the peel strength in wet condition is less than 35%.
- step c) comprises the following steps:
- step c) is carried out by a centrifugation, coating, dipping or other deposition method.
- the structure can also define a polarizing ophthalmic lens comprising:
- the surfaces of said films intended to be brought into contact with said first layer of adhesive are subjected, prior to contacting, to a surface treatment so that the decrease between the peel force in dry condition and the wet coat peel strength is at least 35% or less inclusive.
- the second adhesive layer has a three-layer structure comprising a layer of hot melt adhesive material (HMA) interposed between two layers of latex.
- HMA hot melt adhesive material
- Such an ophthalmic lens may further comprise at least one functional film disposed on the outer face of the protective film, on one side of the polarizing film opposite to the basic optical element.
- a film can give the optical element additional functions, such as suppression of light reflections, protection against shocks or scratches, protection against dirt, fogging or tint
- TAC protective film
- FIGS. 1A and 1B respectively represent a sectional view of a layered structure comprising a polarizing film according to the prior art and that of a polarizing optical element comprising such a structure;
- Figures 2A and 2B show sectional views of two polarizing structures according to the two embodiments of the invention
- Figures 3A and 3B show sectional views of a polarizing optical element comprising polarizing structures according to the two embodiments of the invention.
- the examples above define a polarizing structure.
- a polarizing film 4 is interposed between two protective films 2A, 2B.
- This polarizing film 4 may consist mainly of polyvinyl alcohol, or PVA. It can have a thickness of between 20 and 80 ⁇ .
- the protective films may have a thickness of between 40 ⁇ and 200 ⁇ .
- a layer of pressure-sensitive adhesive material 5A, 5B is interposed respectively between the first protective film 2A and the polarizing film 4 as well as between the second protective film 2B and the polarizing film 4
- This layer of adhesive material may be polyacrylate, and has a thickness of 5 ⁇ to 150 ⁇ . It ensures a permanent maintenance of the protective film on the polarizing film.
- the surfaces of the films 4, 2A, 2B which are intended to be brought into contact with the adhesive material layer 5A, 5B have been subjected to a plasma treatment.
- This surface treatment makes it possible to maximize the surface energy of the films that will be in contact with the adhesive material and to maximize the adhesion of the films.
- maximizing film adhesion is meant the determination of the maximum surface energy that achieves maximum film peel strength under dry conditions.
- the difference between the peel force in dry condition and the peel strength in wet condition must be at least 35% or less.
- this new structure allows the manufacture of a glass (varnish, trimming %) in the presence of water without inducing separation defects between the films in the polarizing structure.
- one of the faces of the polarizing film 4 is covered with a protective film 2A.
- the opposite side of the polarizing film is covered or not with a conditioning film 6 specific to the polarizing film (called "liner").
- a layer of adhesive material 5 is interposed between the polarizing film 4 and the protective film 2. In this way, the two faces of the polarizing film are protected on one side by the protective film 2 and on the other by a film conditioning 6.
- FIG. 2A A first method of producing a polarizing structure according to the invention illustrated in FIG. 2A is now described.
- the pressure-sensitive adhesive material layer 5A, 5B, the polarizing film 4 and the protective film 2A, 2B are initially each in the form of a continuous film sandwiched between two laminating films (called "liner” in English) or without liner.
- the three films 4, 2A, 2B are subjected to a plasma treatment separately or simultaneously.
- a plasma treatment it is removed beforehand.
- the treated face is intended to be subsequently brought into contact with the layer of adhesive material.
- the method for producing the polarizing structure comprises the following steps :
- Steps a) to d) thus allow the realization of the polarizing structure comprising a single protective film (FIG 2B).
- steps a) to d) are repeated so as to add the second TAC 2B protective film.
- the adhesive material being conditioned in the form of a liquid, step c) is carried out by a technique known to those skilled in the art such as centrifugation (spin-coating). in English), coating, dipping or otherwise on one side of the protective film or on one side of the polarizing film, the two faces being pretreated with plasma.
- This embodiment makes it possible to control the thickness of the layer of adhesive material and to optimize it.
- a functionalized layer structure comprising such a polarizing structure and a basic optical element, is now described above.
- a functionalized layer structure comprises two main components: a basic optical element represented by a base lens, and a first element comprising the polarizing structure comprising at least one functional film.
- the base lens is obtained from a Semi-finished lens with two surfaces that are opposite to each other. One of these two surfaces, called the first optical surface, is made directly with a final curvature during the step of manufacturing the semi-finished lens.
- this first optical surface may be the anterior convex surface of the base lens in the final ophthalmic lens, and is determined by the shape of the mold, the molding technique or the injection technique.
- the other surface of the semi-finished lens is temporary and intended to be subsequently scaled to the optical correction of the lens wearer.
- the semi-finished or finished lens material may be a thermosetting material with a reflection index of between 1.5 and 1.7. It can also be a thermoplastic material with a reflection index of between 1.5 and 1.6.
- the polarizing structure as described above and illustrated in Figures 2A and 2B may be thermoformed so that the shape of its curvature is compatible with one of the optical surfaces of the semi-finished or finished lens. This method of preforming the polarizing structure is well known. This polarizing structure has a technical advantage over polarizing structures known by the presence of the two protective films, to facilitate the thermoforming of the polarizing structure.
- the polarizing structure is then applied by a lamination process to the first optical surface of the semi-finished or finished lens.
- a layered structure of adhesive material which may be an adhesive material (PSA) or a latex // HMA // latex trilayer is interposed between the polarizing structure and the base optical element to achieve permanent adhesion.
- this layered structure of adhesive material interposed between the polarizing structure and the base lens is also called adhesive structure.
- this adhesive structure can consist of a monolayer of material pressure sensitive adhesive (PSA).
- PSA material pressure sensitive adhesive
- This layer is particularly advantageous because it makes it possible to apply the polarizing structure simply to the optical surface of the basic optical element while preserving the dioptric properties of the optical element.
- the surfaces which are intended to be brought into contact with the layer of pressure-sensitive adhesive material have also been subjected to a plasma or corona surface treatment.
- the method of producing the polarizing optical element shown in FIG. 3A comprises the following steps:
- a plasma or corona treatment is applied on this uncovered face and on the convex or concave face of the basic optical element; c) peeling one of the two conditioning films from the layer of adhesive material 201 and applying this layer against the plasma-treated face of the base optical element 200 through the conditioning film of the layer of adhesive material
- the polarizing structure is deposited on the convex face of the basic optical element.
- this layer of adhesive material 201 is between 5 and 150 ⁇ so as not to alter the power nominal of the optical element.
- the adhesive structure is first pressed against the exposed and plasma-treated face of the polarizing structure 2.
- the polarizing structure 2 is preformed before being pressed against the convex or concave face of the basic optical element.
- This preforming can be done in different ways. It comprises in particular a thermoforming step during which it is heated before being deformed. The thermoforming temperature is limited so as not to alter the integrity of the polarizing film and so that it can easily fit the shape of the convex face. or concave of the basic optical element.
- the polarizing structure is preformed with the adhesive structure before the assembly is pressed against the convex or concave face of the basic optical element through the polarizing structure
- the procedure is similar: a) the conditioning film 6 of the polarizing film of the polarizing structure 3 is peeled so as to reveal a face of the polarizing film, the other side being covered by a protective film 2;
- the polarizing optical element can also be realized when the adhesive material is in the form of a liquid.
- the adhesive structure 201, 301 may be a stack of three-layer Latex / Hot Melt Adhesive Material (HMA) / Latex.
- HMA Hot Melt Adhesive Material
- the method of transferring the polarizing structure no longer requires the plasma treatment step.
- Deposition of such an adhesive structure on the convex face of the base optical element 200, 300 is known. It consists of a set of deposition steps by spin-coating and heating.
- Such an adhesive structure is described in WO 201 1/053329.
- the polarizing films are protected on one side by a protective film and on the other side by the optical base element, against any dirt or scratch that may occur during the use of the optical element.
- polarizing structure In the case where the polarizing structure is applied on the convex face of the optical element, functional coatings may be placed on the protective film on the outer face thereof, namely the face furthest from the eyes of the optical element. carrier of ophthalmic lenses. These coatings thus make it possible to confer, in addition to the optical element, an anti-shock function, an antireflection function, an anti-abrasion, anti-fouling, anti-fogging or colored function.
- the peel test consists of rolling a 25 x 70 mm strip of pressure-sensitive adhesive material onto a protective film strip.
- This tape protective film + adhesive material
- This test makes it possible to test the adhesion between the polarizing film and the protective film.
- the glass is conditioned at least 24 h (at 23 ° C ⁇ 3 ° C, 50% RH ⁇ 10%) before peeling.
- the film is peeled at a 90 ° angle at a speed of 2.54 cm / min.
- a quantity of water is added to the interface to measure the peel force in a humid environment. The force is expressed in N / 25mm.
- calibrated inks are applied on the surface of the untreated films and then a second time on the treated material (plasma or corona). If the applied ink is stable, the substrate surface voltage is at least the value of the test ink.
- the ink is contracted, is repeated the test with an ink showing a lower surface tension.
- the surface energy of the material is equal to the value of the last ink tested which showed good wetting for several seconds.
- the protective films and the polarizing film are subjected to an oxidizing plasma (vacuum or atmospheric plasma), or a corona (atmospheric plasma), just before the films are assembled together. with the adhesive.
- oxidizing plasma vacuum or atmospheric plasma
- corona atmospheric plasma
- the plasma parameters used in the examples below are as follows: Vacuum plasma machine reference: M4L, pressure 376 mTorr, gas flow 200 sccm O2, Power 390 W, exposure time 30 seconds.
- TAC films and PVA film are provided by FUJI and ONBITT respectively
- This polarizing layer structure is then laminated on an optical element marketed under the name Ormix basic index 1 .6.
- the lamination process is described in WO / 2012/078152.
- the samples are inspected to determine if there are cosmetic defects such as the separation of films in the polarizing structure.
- cosmetic defects such as the separation of films in the polarizing structure.
- the polarizing structure of the sample 1 was carried out without surface treatment on the TAC and PVA films before assembly of the layers, in the sample 2, only the PVA film was treated and in the sample 3 only the TAC film has been processed.
- the surface energy is not maximum, the peel force decreases when passing from a test performed in a dry condition to a test performed in a wet condition drastically.
- this decrease is between 57% and 69%.
- the stack exhibits delamination type defects, namely a separation between the films in the polarizing structure.
- the surface treatment is applied only to the TAC film face, ie the protective film which has a maximum surface energy of 50mN / m.
- the PVA film which has not been subjected to a surface treatment then has a low surface energy, 40 mN / m. Although the decrease between the dry peel strength and the wet peel force is small, on the order of 9%, this sample has delamination defects after the clipping step. This result shows that it is necessary to treat both sides of the films to be contacted with the adhesive material to have effective cooperation between the treated films and the adhesive material and a peel force in the maximum dry condition. In Table 1, this peel force in dry condition is 16.6 N / 25mm (Sample # 4).
- the samples are made under the same conditions as samples 1 to 6.
- the polarizing structure TAC // PVA // TAC, treated on all the film interfaces before assembly, assembled with a 3M adhesive ref. 8146-X, (of suitable chemical composition) has different thicknesses of 5 ⁇ (sample 7), 15 ⁇ (sample 8), 25 ⁇ (sample 9), 50 ⁇ (sample 10), 75 ⁇ (sample 1 1), 150 ⁇ (sample 12).
- the plasma treatment is applied to the TAC and PVA films so that their surface energy is maximum, equal to 50 and 58 mN / m respectively.
- the polarizing structure then presents no defects
- the polarizing structure is assembled based on an adhesive material sold by Panac, reference PD S1, of different thicknesses: from 5 ⁇ (sample 13), 10 ⁇ (sample 14), 15 ⁇ (sample 15), 25 ⁇ (sample 16).
- This table shows that the system does not work with a pressure sensitive adhesive whose chemical composition is inadequate and therefore does not cooperate with the plasma treatment even if the surface energy is maximum. This non-cooperation between the adhesive material and the plasma treatment therefore induces a significant difference between the peel strength in dry condition and the peel force in wet condition. It varies between 77% and 89%, regardless of the thickness of the adhesive.
- the samples have defects after the different glass manufacturing steps.
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Health & Medical Sciences (AREA)
- Ophthalmology & Optometry (AREA)
- General Health & Medical Sciences (AREA)
- Polarising Elements (AREA)
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Thermal Sciences (AREA)
- Organic Chemistry (AREA)
- Laminated Bodies (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
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KR1020167003326A KR20160040570A (ko) | 2013-08-05 | 2014-07-01 | 기능화된 층 구조 |
US14/910,137 US20160216425A1 (en) | 2013-08-05 | 2014-07-01 | Functionalised layered structure |
CN201480043600.4A CN105473330B (zh) | 2013-08-05 | 2014-07-01 | 功能化层状结构 |
EP14747073.6A EP3030419A1 (fr) | 2013-08-05 | 2014-07-01 | Structure en couches fonctionnalisee |
JP2016532711A JP2016527567A (ja) | 2013-08-05 | 2014-07-01 | 機能化層構造 |
Applications Claiming Priority (2)
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FR1357770 | 2013-08-05 | ||
FR1357770A FR3009234B1 (fr) | 2013-08-05 | 2013-08-05 | Structure en couches fonctionnalisee |
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WO2015018992A1 true WO2015018992A1 (fr) | 2015-02-12 |
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PCT/FR2014/051690 WO2015018992A1 (fr) | 2013-08-05 | 2014-07-01 | Structure en couches fonctionnalisee |
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US (1) | US20160216425A1 (fr) |
EP (1) | EP3030419A1 (fr) |
JP (1) | JP2016527567A (fr) |
KR (1) | KR20160040570A (fr) |
CN (1) | CN105473330B (fr) |
FR (1) | FR3009234B1 (fr) |
WO (1) | WO2015018992A1 (fr) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106483592A (zh) * | 2015-08-24 | 2017-03-08 | 日东电工株式会社 | 带表面保护膜的光学构件 |
EP3757663A4 (fr) * | 2018-02-23 | 2022-03-23 | Tokuyama Corporation | Corps multicouche fonctionnel et lentille fonctionnelle utilisant un corps multicouche fonctionnel |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20200223188A1 (en) * | 2016-07-20 | 2020-07-16 | Nippon Sheet Glass Company, Limited | Antifog film |
EP3392700A1 (fr) * | 2017-04-19 | 2018-10-24 | Essilor Italia Societa per Azioni | Article ophtalmique |
CN108724871A (zh) * | 2017-04-19 | 2018-11-02 | 可口可乐公司 | 一种含有偏振膜的包装复合材料及含有该材料的包装 |
WO2024022948A1 (fr) | 2022-07-28 | 2024-02-01 | Essilor International | Structure stratifiée optique fonctionnalisée, article optique fonctionnalisé, lunettes les contenant, et leurs procédés de fabrication |
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US8221855B2 (en) * | 2005-09-30 | 2012-07-17 | Fujifilm Corporation | Cellulose derivative film, optical compensation film, polarizing plate, and liquid crystal device |
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-
2013
- 2013-08-05 FR FR1357770A patent/FR3009234B1/fr active Active
-
2014
- 2014-07-01 CN CN201480043600.4A patent/CN105473330B/zh active Active
- 2014-07-01 JP JP2016532711A patent/JP2016527567A/ja active Pending
- 2014-07-01 EP EP14747073.6A patent/EP3030419A1/fr not_active Withdrawn
- 2014-07-01 KR KR1020167003326A patent/KR20160040570A/ko not_active Application Discontinuation
- 2014-07-01 WO PCT/FR2014/051690 patent/WO2015018992A1/fr active Application Filing
- 2014-07-01 US US14/910,137 patent/US20160216425A1/en not_active Abandoned
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US6512562B1 (en) * | 1999-04-15 | 2003-01-28 | Konica Corporation | Protective film for polarizing plate |
FR2897693A1 (fr) * | 2006-02-23 | 2007-08-24 | Essilor Int | Element optique polarisant comprenant un film polariseur et procede de farbrication d'un tel element |
US20110151146A1 (en) * | 2008-08-29 | 2011-06-23 | Konica Minolta Opto, Inc. | Optical film, anti-reflection film, polarizing plate and liquid crystal display device |
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CN106483592A (zh) * | 2015-08-24 | 2017-03-08 | 日东电工株式会社 | 带表面保护膜的光学构件 |
EP3757663A4 (fr) * | 2018-02-23 | 2022-03-23 | Tokuyama Corporation | Corps multicouche fonctionnel et lentille fonctionnelle utilisant un corps multicouche fonctionnel |
US11988808B2 (en) | 2018-02-23 | 2024-05-21 | Tokuyama Corporation | Functional laminate and functional lens comprising the functional laminate |
Also Published As
Publication number | Publication date |
---|---|
CN105473330A (zh) | 2016-04-06 |
KR20160040570A (ko) | 2016-04-14 |
FR3009234B1 (fr) | 2017-09-29 |
CN105473330B (zh) | 2018-04-17 |
US20160216425A1 (en) | 2016-07-28 |
FR3009234A1 (fr) | 2015-02-06 |
JP2016527567A (ja) | 2016-09-08 |
EP3030419A1 (fr) | 2016-06-15 |
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