[1]Background of the invention
[3]The invention relates to a method for manufacturing optical fiber ribbon and, more specifically, relates to coating of the coating of the optical fiber ribbon of the optical fiber manufacturing method, when the first of the stretched fiber, by introducing the paint coloring coloring agent, this method advantageously avoids the application of ink independently of steps and avoid the waste.
[4]2. Description of related prior art
[5]In the conventional optical fiber ribbon, the number is usually 4, 8 or 12 for the fiber of the optical fiber in parallel arrangement and through radiation curable matrix material bunched together. Each fiber contains a primary coating and sub-coating. Preparing a primary coating (it is directly applied to the glass), in order to get low modulus and Tg (glass transition temperature) of the coating, in order to buffer the stress induced fiber. The design sub-coating in order to have a higher modulus and Tg to provide solvent resistance and wear resistance.
[6]Production of optical fiber with the 1st step includes taking into account any relevant standards and, in particular, the coated fiber diameter, selecting the appropriate optical fiber. Furthermore, usually adopt the thickness is typically 1-5 micron ink layer, further painting painting of the fiber. I.e., containing the primary and secondary coating of the fiber is removed from the reel, and the coating of ink, the ink layer is usually radiation curable coating composition, the composition comprises a pigment system for color. Then-curable ink coating layer, and containing the primary, secondary and ink coating layer on the optical fiber is disposed on a spool. Then in this manner, the desired number of coated fiber is placed in the so-called "pine-tree" is, it includes one or more device of the rotating wheel, rotating wheel in a certain way send fiber, so the use of a pulley system to control the tension of the each fiber.
[7]After loose from the reel, the required number of coating the fiber arrangement in a plane, so that they just contact arrangement. Furthermore, through the fiber matrix die slit 1st, in the fiber-coated in the radiation-curable matrix material, thereafter the liquid matrix material, typically urethane acrylate material, coating to the fibers. Slit-shaped substrate through the 2nd to die after removing excess matrix material, will contain the liquid matrix material is coated on the fiber to actinic radiation, in order to solidify the matrix material. Then the optical fiber ribbon is placed in the reel, is usually 25 km length.
[8]In the independent applied ink is detrimental in the step of coating an ink layer, this is because the cost is high. Furthermore, coating of the coating of the ink in the conventional manner, the ink sometimes occur in the coating of caking, it causes the change of the ink coating thickness and fiber fracture. Similarly, the changes of the thickness of the ink coating, using different colored ink coating, matching a set of 4-12 the overall fiber diameter of the fiber is usually more difficult.
[10]Therefore, the purpose of this invention is to provide an improved method for preparing optical fiber tape, therefore does not need to adopt the ink coating layer coating the optical fiber with an independent step.
[11]Another purpose of this invention is to provide improvement comprising colored optical fiber of the optical fiber ribbon, the optical fiber ribbon is not in the independent of the applied ink preparation of the steps, and comprises a colored secondary coating, the secondary coating and matrix material can basically not react to each other.
[12]Through a method for making optical fiber band achieve these objectives and other purposes, the primary the method comprises the use of a plurality of optical fiber coating composition and curable primary coating composition, is formed on the optical fiber with a primary coating layer. The sub-the coating composition containing a primary coating layer of the optical fiber, the secondary coating composition comprising an effective amount of pigment, dye, and/or colored reactive component, to the optical fiber applied ink used, and an effective amount of a photo-initiator, when exposed to actinic radiation used for the secondary coating composition is a colored initiate solidification. The preferred photo-initiator to oxygen free radical quenching effect is not sensitive. Basic elimination of adjacent to the secondary coating composition of oxygen, and at least a substantially completely cure sub-coating composition and the surface of the main body. The material is coated on a base containing primary coating layer and a sub-coating layer of the optical fiber. The secondary coating composition is coated at the same time at least substantially completely solidified, the adjacent matrix material and sub-coating, but no reaction to each other.
[13]Also provided is an optical fiber ribbon. The optical fiber ribbon includes a plurality of optical fibers, each optical fiber containing the primary coating layer and a sub-coating layer. Sub-coating layer is from the above-prepared colored secondary coating composition. Coated on the matrix material containing the primary and secondary coating layer of the optical fiber. The base material adjacent and sub-coating layer, but no reaction to each other.
[14]With photos brief description
[15]When combining when reading the following description of the attached drawing, the other characteristics and advantages of the invention will be obvious, wherein:
[16]Attached Figure 1 is a schematic diagram of part of the radiation which can be used in the present invention device.
[17]Detailed description of preferred embodiments
[18]The present invention provides improved process for preparing optical fiber tape, the method is characterized in that the advantage of not needing independently with applied ink to optical fiber. According to the present invention, and the with optical fiber secondary coating, secondary coating comprises a coloring agent for coloring the optical fiber. Furthermore, with the optical fiber of conventional secondary coating on the contrary, before the coating matrix material, includes the colorant sub-coating the surface of the body and completely or substantially completely cured. This kind of situation achieved through the following way: is not sensitive to oxygen relative to the use of a photo-initiator, and the limited amount of oxygen in the environment, wherein the secondary coating is exposed to actinic radiation. In this way, the preparation method of providing optical-fiber ribbon, thus eliminating applied ink off-line coating of the coating. According to the present invention, the primary and the secondary coating of the optical fiber can be advantageously made directly into an optical fiber with, without any interference processing.
[19]In this use of the term "colorant" is defined to include pigments, dyes and any other currently known or in the future for the development of color-imparting secondary coating of suitable material.
[20]According to the invention, the optical fiber with a primary coating can be any primary coating composition and can adopt any appropriate coating and curing a conventional mode. For example, a primary coating composition may include a relatively high molecular weight (approximately 5000 g/mol) by adding the functionalized with reactive monomer diluents reduce the viscosity of the urethane diacrylate oligomer, adhesion promoter, a photo-initiator, and stabilizer. Such a primary coating formulation examples are as follows:
[21]Table 1
| hydrocarbon principal chain contain saturated aliphatic urethane acrylate oligomer | 55.00 |
| Acrylic acid dodecyl ester monomer | 14.5 |
| Hydroxy cyclohexyl phenyl alkone photosensitive initiator | 6.00 |
| octyl decyl -3-(3 the [...] , 5 the [...] -di-tert-butyl -4 the [...] -hydroxy) hydrocinnamic acid ester stabilizer | 1.50 |
| Octadecyl-3-mercaptoprapionic diethylene glycol dinitrate chain chain transfer agent | 2.75 |
| Γ-mercapto propyl trimethoxy silane adhesion promoter | 0.75 |
| Propylene glycol nonyl ether acrylate | 19.50 |
[22]Illustrative U.S publicizes in primary coating composition. Patent Nos. 5,352,712, 4,639,080 and 5,146,531 in, their introduction in the public content as a reference. Suitable primary coating composition can be purchased from, for example, Borden, Inc. , 630 Rd Glendale Milford. , Cincinnati, OH, 45215. Other suitable primary coating composition to the technicians of this field is obvious.
[23]According to the present invention is used for the band in the secondary coating of the optical fiber also can be any suitable sub-coating composition, with the proviso that the secondary coating composition comprises a coloring agent, the fiber, the coloring agent to provide the necessary arranges the color identification, and conditions are sub-the coating composition comprises at least substantially to the oxygen-sensitive photo-initiator. In this use of the terminology "at least substantially to the oxygen-sensitive photo-initiator" is defined as such a photo-initiator, comprising about 9% oxygen or less in the presence of the atmosphere, in the radiation chamber, the photo-initiator reach-in the secondary coating solidification level. In other words, a photo-initiator to oxygen free radical quenching effect is not sensitive.
[24]The photo-initiator used in the present invention, in the coating matrix material before the fibers, obtain a secondary coating composition body and a surface of the two is completely or substantially completely solidified, in order to prepare the optical fiber ribbon. In this use of the terminology of the "sub-coating composition is fully cured the basic" defined as preferably, the layer of at least about 90% solidified, more preferably, the layer of at least about 92% curing, and most preferably the layer of at least about 95% of the curing, the layer such as by as determined by the method. While not wishing to be bound by theory, it is believed that using conventional free radical photo-initiator, the presence of oxygen inhibits the polymerization, in particular the surface of the secondary coating. In particular, I believe that the presence of oxygen inhibits decomposition of the free radical-containing photoinitiators to the growth of the segment and polymerization.
[25]Sub-coating composition can, for example, is that molecular weight is relatively low (about 1000 g/mol) of the urethane acrylate oligomer, in the main chain of the molecule containing the cyclic structure is used for additional rigidity, through appropriate reactive diluents reduce the viscosity, a photo-initiator and the stabilizer, in addition to the coloring agent comprises the above-mentioned type. Examples of such formulations:
[26]Table II
| Urethane methyl acrylate oligomer | 68.4 |
| Diluent isobornyl acrylate | 14.4 |
| N-vinyl pyrrolidone | 15.4 |
| Lucirin LR 8728 photoinitiator | 1.5 |
| Irganox 1035 stabilizer | 0.3 |
[27]According to the present invention, in addition can be formulated to include a pigment U.S publicizes in illustrative sub-coating composition. Patent No. 5,787,218 in, in this disclosure the introduced as a reference. Oxygen comprising a pigment and is not sensitive to the appropriate photoinitiator secondary coating composition can be purchased from, for example, DSM, Desotech, 1122 Street St.Charles, Elgin, Illinois, 60120.
[28]Preferably, secondary coating composition around the primary coating has a substantially uniform thickness. Furthermore, the thickness of the secondary coating is preferably at least about to the 2 m, more preferably about 3-30 the m.
[29]According to the present invention in the secondary coating of the coloring agent can be any suitable coloring matter, includes a generally used for independent ink coating pigment, dye, and the like. Typical pigment can be an organic or inorganic material, for example, titanium oxide, azo yellow , [...] compound and phthalocyanine green and blue, with a total of required for generating color brightness, color and chromaticity. Other suitable coloring matter for the technicians of this field is obvious. Mature science is pigment, and in many of the large number of described in the literature.
[30]Preferably, the colorant is finely divided pigment system, the diameter of the particle size distribution does not include> 5 micron particle. More preferably, the colorant is finely divided pigment system, the diameter of the particle size distribution does not include> 1 micron particles.
[31]As mentioned above, according to the present invention, included in the secondary coating composition for a photo-initiator in the oxygen is relatively sensitive. For example, according to the present invention is used in the secondary coating composition can be a photoinitiator acylphosphanes oxide. According to the present invention is suitable for the secondary coating composition of the U.S publicizes in illustrative photoinitiator. Patent Nos. 5,837,750 and 5,416,880 in, their introduction in the public content as a reference. According to the present invention is used for sub-coating composition comprises a photoinitiator appropriate (2, 4, 6-trimethyl benzoyl) b benzyl phosphine oxide (Lucirin TPO, from BASF), and bisacylphosphine oxide (for example, from Ciba Specialty of Chemicals Irgacure 819). In the invention use other secondary coating, in order to solidify acylphosphanes oxide comprises a double (2, 6-dimethoxy-formyl)-2, 4, 4-trimethyl amyl phosphine oxide, double (2, 6-dimethoxy-formyl)- benzyl phosphine oxide, double (2, 4, 6-trimethyl benzoyl)- benzyl phosphine oxide, double (2, 4, 6-trimethyl benzoyl)-2, 4, 4-trimethyl amyl phosphine oxide, phosphine oxide compound three (benzoyl), three (2-methyl-benzoyl) phosphine oxide compound , three (2, 6-dimethyl-benzoyl) phosphine oxide compound , three (2, 4, 6-trimethyl benzoyl) phosphine oxide compound , three (2-methoxybenzoyl) phosphine oxide compound , and the like. Preferably, according to the present invention a photo-initiator in the secondary coating composition is in an amount of 0.1-10 wt %, more preferably about 0.1-6 wt %, and most preferably from about 0.5-3 wt %, based on the weight of the total formulation. According to the present invention is used for sub-coating composition for a photo-initiator other appropriate technical personnel in this field is obvious.
[32]Can be made of any suitable conventional mode, according to this invention to sub-coating composition containing the primary coating layer of the optical fiber.
[33]Similarly, according to the present invention, in the coated fiber matrix material and, in particular, before the solidification period the secondary coating, secondary coating to exposed to the limit of the amount of oxygen in the environment. This is because that, although a photo-initiator to oxygen is relatively sensitive, in the secondary coating composition during curing, the presence of the oxygen still will inhibit the growth of the polymer chain. In particular, in the method of the present invention removing device for use in, the coating after the, for the secondary coating composition during curing of the radiation, the neighbouring sub-coating composition substantially eliminating the presence of the surface air. In this use of the terminology "substantially eliminating the presence of the air" is defined as preferred for the elimination of at least about 80% of the air, even more preferably at least about 90% of the air, and most preferably at least about 95% of the air, adjacent to the secondary coating composition, in particular the boundary layer air. In other words, in the already containing coating applied to the optical fiber after the primary coating, the use of removing device, to the existing around the secondary coating to the above-mentioned percentage of the air boundary layer is removed, a cured optical fiber and at the same time.
[34]According to the invention, coated with the uncured, liquid sub-coating composition through the small hole of the fiber, such as by closing to about 5 mm diameter of the variable diaphragm, reach the radiator, from a similar gap left at the bottom of the radiator. Within the radiator, the fiber-free through the quartz cylinder cooling radiator of the bulb by the impact of the air flow, from the inlet to the outlet of the radiator, this allows actinic radiation to reach the fiber. In the radiator of the inert atmosphere can be any suitable inert gas, such as nitrogen, and preferably a pressure higher than that under the pressure of external environment, in order to further prevent the boundary layer around the secondary coating of the air entering the radiator. In the radiator and, in particular is distributed in the above-mentioned inactive gas inert atmosphere in the chamber, preferably the volume flow rate in an amount sufficient to provide, at the top of the radiator, leaving the radiator through the variable diaphragm to maintain the volume flow of the in the following flow: about 1-50 liters/minute, more preferably about 1-30 liters/minute, and most preferably about 20 liters/minute.
[35]When the entering the radiator through the small slit, leaving an inert atmosphere for removing the boundary layer from the coating of the fiber, and adjacent coated fiber protective atmosphere changed from the interior of the quartz tube to replace an inert atmosphere. In this way, the secondary coating containing coloring agent to the fully or substantially fully cured. The hole in the radiator, containing sub-coating composition through the hole of the optical fiber, having any appropriate size, they will remove the around the secondary coating composition of the air boundary layer. Preferably, in the present in the optical fiber secondary coating composition between the outer edge and the edge of hole tolerance is about 3-5mm, more preferably about 2-3mm, and most preferably about 1 mm.
[36]See Figure, according to this invention used for curing sub-coating the appropriate radiator device comprises a protective quartz cylinder 20 (to false contour expressed) of the UV lamp casing 10, coating of the optical fiber 30 to the downward direction through the cylinder, in order to is simple, not shown UV lamp with the UV lamp and other related apparatus. Inert gas distribution chamber 40 includes an inlet for inert gas 42, and used for coating the optical fiber 30 into the gap or orifice 44. As mentioned above, with respect to the external environment pressure, in the housing 10 and, in particular in the chamber 40 for keeping a positive pressure in the. Because of this pressure difference, the inert gas out of the chamber 40 of the orifice 44, such as by the arrow 46 shown in, and effectively from the coating optical fiber 30 to remove such as by the-arrow 48 including oxygen shown in the air boundary layer.
[37]In the radiator, in the following through the hole in the manner described above, in any suitable conventional mode, according to this invention to sub-coating composition to actinic radiation.
[38]As noted above, secondary coating composition with the conventional complete solidification of the surface of the optical fiber on the contrary, the surface of the fully cured general avoid, in the drawing and in the subsequent processing, to the winding of the fiber.
[39]According to the present invention, as mentioned above, in the secondary coating composition is cured or basic after curing, to its coating conventional of the matrix material. The matrix material may be any of the known thermoplastic or thermosetting material, their is solidified when exposed to actinic radiation. Illustrative matrix material comprises Chemical from Borden, Cincinnati, Ohio of the matrix material 9MKU73055. For example, matrix material may be include aliphatic urethane acrylate oligomer, a reactive monomer, of the release agent, and, optionally, the material of the photoinitiator. The base material of the appropriate matrix material of the coating and method described in the U.S. Patent Nos. 5,908,873 in, in this disclosure the introduced as a reference. In fact, those other than the above, other suitable matrix material to the technicians of this field is obvious.
[40]According to the invention the production includes inking optical fiber of the optical fiber with the method, the coating operation independent of the ink. Through the use of pigment, dye, etc., including combinations thereof, according to the invention of the secondary coating composition contains color, and by the primary and the secondary coating of the optical fiber is directly processed into a belt, but is not inserted into a colored or processing stage, greatly improved the performance of the belt and produce. Similarly, through the elimination of additional interface, that is, the secondary coating and ink the interface between the coating layer, with the performance of the improved optical fiber. In other words, according to this invention, secondary coating and base material is advantageously contiguous, that is, in contact with each other, but sub-coating layer and the base material does not react together, in order to form a substantially bonded, in the matrix material before coating, secondary coating composition has been at least substantially completely solidified. If the of use, and with the matrix material of the secondary coating composition using the terminology of the associated "no reaction to each other", is characterized in that the performance attribute, that is, from the formed base material substrate can be arranged in the plane of the belt a plurality of fibers one side of the, basic in order to film peeling, without tearing.
[41]The invention is characterized in that the resistance to "squeeze" the edge of the optical fiber with the edge of the stress, the material is not a substrate from a plurality of optical fiber abhesion. The belt can be 6 inches in length of 720 degrees torsion, without the substrate abhesion from a plurality of fibers. Furthermore, by using the technical personnel in this field is usually used for this purpose the adhesive peeling board use, from the plane of one side of the arranged fibers, can be removed in the form of a sheet base material. Furthermore, the invention is characterized in that the resistance increase the attenuation of the immersed in the water, that is, limited increase the attenuation of the signal transmission. In particular, containing 4, 8 or 12 can be immersed in the fiber with the 60 in water [...] 30 days, without any increase in the fiber attenuation 1dB/km. Containing 4, 8 or 12 can be immersed in the fiber with the 23 in water [...] 30 days, without any increase in the fiber attenuation 0.05dB/km.
[42]Through the embodiments further illustrate the invention, embodiment used for illustrative purposes and is not the purpose of limitation.
[44]The single-mode optical fiber is stretched to the 125 micron diameter, cooling, and in a standard tensile lower part of the tower (partway down) in the coating applicator, a 30 micron layer of thick urethane acrylate a primary coating formulation coating. The primary coating of the fiber in the radiator, the radiator containing the fiber channel parallel and are located in a sleeve a focal point of the elliptical reflector the actinic radiation source. The channel of the primary coating of the fiber is formed by the radiation reflector 2nd focal point of the ellipse. The primary coating of the fiber on the partially cured liquid in the radiator and the above-mentioned gel point of the coating.
[45]The partially cured containing the primary coating of the fibers into the another applicator, wherein the coating 30 micron level colored secondary coating. The colored secondary coating comprising acylphosphanes oxide and bisacylphosphine oxide photoinitiator, Lucirin TPO, and Irgacure 819 (purchased from BASF) (purchased from Ciba Chemicals Specialty) to the 50 [...] 50 weight ratio combination of, a photo-initiator to about 3 wt % of the total concentration, based on the total weight of the secondary coating composition. Double-coated fiber into the other radiator, arranged in sequence in the fiber channel in a set of three radiator in a 1st, in order to solidify sub-coating and completely curable primary coating. These radiator, such as is used for curing a primary coating of those, each radiator in through the, on the fiber channel quartz central tube, providing the cooling air cross-flow protection. Quartz central tube of inert atmosphere containing nitrogen gas. Through the variable diaphragm, the 1st inlet of the radiator is limited to the 3 mm diameter. Furthermore, in a certain volume flow rate, to provide an inert atmosphere inside of the tube, the inlet of the radiator through the 1st leave the flow of the inert atmosphere is about 20 liters/minute. 1st radiator inlet of the array of in, from the low pressurized lamp with the interior of the outflow of inert atmosphere, removing the boundary layer of air which, in pure nitrogen gas replace it.
[46]The bottom of the extending, in the receiving cylinder roll-up winding double-coated fiber. The adoption of the following method for testing of the FTIR, found that the coating on the fiber is substantially completely cured.
[47]In the same way, producing 12 color double-coated optical fiber, all containing sub-coating of the fiber is substantially completely cured, such as FTIR measurement.
[48]The other steps in order to further improve the double-coated fiber sub-coating at the surface of the solidification. Because the fiber has been colored, no coating ink.
[49]Will represent the twelve different colors of the twelve-line for arranges the color axis double-coated optical fiber, is placed in the mechanical loose on the rotating shaft of the device. This loose roll device is designed to allow a single fiber out continuously and, in each of the fiber would be about 30-40 g of the spool to maintain a tension to each of the end of each fiber. Through a series of the fiber with the arrangement of the groove wheel, the rotating wheel in order to maintain fiber, is arranged parallel and substantially planar array, and is arranged to closely contact each other. The fiber through a die the basic plane array, wherein the fiber is maintained further improvement of the arrangement and the fiber in contact with each other, and wherein the liquid UV curable coating a resin matrix material applied to the fiber array. From parallel fibers painting die head the basic plane array, at least by the base material layer around, such coating in the thickness and the width of the array of the overall size is homogeneous. Furthermore, the array of coated by high intensity UV radiation source, the liquid on the fiber which are caused by the solidification of the material matrix. During processing, the spool continuously winding cured fiber array. This kind of belt manufacturing process can be continuously processed until the double-coated optical fiber of the initial fiber bobbins-depleted.
[50]According to this invention, secondary coating solidification quantity used for measuring the appropriate program adopts the Fourier transform infrared spectroscopy (FTIR), in order to allow the curable secondary coating on the fiber at the surface and in the vicinity of the content of residual reactive functionality computing, relative to the liquid coating prepolymer the content of the reactive functionality. In the following procedures, is acrylic acid ester-reactive functionality can be degrees.
[51]solidification quantity for measuring sub-coating procedures for the Fourier transform infrared spectroscopy
[53]1.1 the optical fiber that is used for measuring the extent of cure of a coating on the FTIR program;
[54]1.2 the method is characterized in that the coating surface and the 1-4 m a measure of the degree of cure depth.
[55]1.3 FTIR attenuation of the total reflectance (ATR) annex in order to examine coated fiber.
[56]2.0 equipment/material
[57]2.1ATR crystal, KRS-5, 45 °, parallelogram, 10 mm × 50 mm × 3 mm.
[58]2.2ATR sampling annex, 45° is installed, with the container.
[59]2.3 transparent adhesive tape
[61]2.5FTIR spectrometer, such as the Nicolet 550.
[63]3.0 sample preparation
[64]3.1 cutting 50 mm length coated optical fiber, is mounted to the KRS-5 crystal along the length direction.
[65]A. Placed on the plane 150 mm long transparent adhesive tape, the adhesive side.
[66]B. On the adhesive tape is placed side by side a series of 100 mm length fiber, thus they are bonded to the adhesive and as close as possible to the until they form about 10 mm × 100 mm of the rectangular area.
[67]C. In order to obtain a fiber bundle cut into two half.
[68]4.0 instrument assembly
[69]4.1 on the FTIR optical bench in assembling of the, arrangement light with seat.
[70]4.2 mounting KRS-5 crystal and the debugging the IR beam in order to obtain the position of maximum signal.
[71]4.3 crystal in the IR beam, to collect background infrared scanning.
[72]5.0 fibroepithelial the degree of cure
[73]5.1 the 10 mm × 50 mm fiber array sample is fixed on each side of the crystal, that the crystal is in contact with and the end of the fiber is angled into the crystal infrared ties the channel.
[74]5.2 installation and use of 100 scanning the sample scanning.
[75]5.3 cleaning KRS-5 crystal and on one side of the drop of liquid coating is placed on, applying coating in order to cover the approximately 1/2 one side of the crystal.
[76]5.4 installation and use of 100 scanning the sample scanning.
[78]6.1 measuring liquid coating acrylate unsaturated absorption of the net peak area.
[79]A. For most acrylic acid ester coating, should use 810 cm-1 estimating of. 1410 cm-1 and 1635 cm-1 is also satisfactory.
[80]B. "Baseline" should be used to measure the net peak area, wherein in the peak of the drawing either side of the minimum points tangent to the baseline. Then measuring the peak area of more than and the baseline of the following.
[81]6.2 the spectrum of the coating on the fiber, repeat the above steps.
[82]6.3 a liquid and cured coating to both the reference peak spectrum, repeat steps
[84]6.3.1 when the coating is cured, the peak intensity must not be changed.
[85]A. If selection 810 cm-1 propylene diethylene glycol dinitrate peak , most formulations in 780-750 cm-1 area with an absorbent, they can be used as a reference.
[86]B. For the same for each subsequent analysis of formulations, same reference peak must be used, and the same baseline point.
[87]6.4 use the following formula, determined the liquid acrylic ester estimating the proportion of the reference points
[89]Wherein AAL = liquid acrylic ester-absorbing area
[90]ARL = liquid reference-absorbing area
[91]RL = liquid coating the area ratio of the
[92]6.5 using the following formula, determined the acrylate absorbance to the fiber coating reference points
[95]Wherein AAF = fibroepithelial acrylate-absorbing area
[96]ARF = fibroepithelial reference-absorbing area
[97]RF = fiber coating is cured on the area ratio of the
[98]6.6 calculating degree of cure
[99]6.6.1 use the following formulac residual unreacted (%RUA) acrylate percentage
[100]%RUA= (RL-RF) RL × 100
[101]6.6.2 degree of cure is calculated as 100%- %RUA
[102]Although the present invention has been the preferred embodiments of it are described, without departing from the scope of the present invention, many other changes and improvements to the technicians of this field is obvious. Therefore, preferably the invention is not in the defined by the specific disclosure, but only by the attached claims define the right.
