TW202308845A - Multilayer optical film - Google Patents
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- 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
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- 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
- B32B7/02—Physical, chemical or physicochemical properties
- B32B7/023—Optical properties
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- 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
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J201/00—Adhesives based on unspecified macromolecular compounds
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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
Abstract
Description
本發明涉及一種積層光學薄膜。The invention relates to a laminated optical film.
顯示面板具有例如包含像素面板、觸控面板、表面保護覆蓋件等之積層結構。顯示面板之積層結構中還包含具有預定光學機能之各種機能性光學薄膜。機能性光學薄膜可舉例如偏光件薄膜及相位差薄膜。機能性光學薄膜例如係在透過接著劑而與保護薄膜等其他光學薄膜接合之狀態下、亦即在積層光學薄膜之形態下組入積層結構中。關於所述積層光學薄膜,例如記載於下述專利文獻1中。 先前技術文獻 專利文獻 The display panel has, for example, a laminated structure including a pixel panel, a touch panel, a surface protection cover, and the like. The laminated structure of the display panel also includes various functional optical films with predetermined optical functions. Examples of functional optical films include polarizer films and retardation films. A functional optical film is, for example, incorporated into a laminated structure in a state where it is bonded to another optical film such as a protective film through an adhesive, that is, in the form of a laminated optical film. Such a laminated optical film is described, for example, in Patent Document 1 below. prior art literature patent documents
專利文獻1:日本專利特開2019-147865號公報Patent Document 1: Japanese Patent Laid-Open No. 2019-147865
發明欲解決之課題 隨著顯示面板之薄型化,光學薄膜之薄膜化不斷進展。積層光學薄膜之光學薄膜愈薄,積層光學薄膜之端部就愈容易因外力而發生裂痕等損傷。若於積層光學薄膜之端部發生裂痕,該裂痕例如會朝該薄膜之面方向上的內部區域延伸而成長。於端部發生裂痕會成為所述較大裂痕的原因,故不理想。又,非矩形之異形顯示面板之顯示功能會利用至面板端緣,因此強烈要求抑制端部裂痕。以智慧型手機等異形顯示面板來說,以往因組入有該面板之器件的長期使用,於異形加工周邊部之面板端部的微小裂痕會往面板內側進展,而容易於器件顯示畫面發生亮線。從而強力要求抑制所述不良狀況。 The problem to be solved by the invention Along with the thinning of display panels, the thinning of optical films continues to progress. The thinner the optical film of the laminated optical film is, the easier it is to cause damage such as cracks at the end of the laminated optical film due to external force. When a crack occurs at the edge of the laminated optical film, the crack grows, for example, extending toward the inner region in the surface direction of the film. Cracks generated at the ends are not preferable because they cause the above-mentioned large cracks. In addition, since the display function of a non-rectangular shaped display panel is utilized to the edge of the panel, it is strongly required to suppress cracks at the edge. In the case of special-shaped display panels such as smartphones, due to the long-term use of the device incorporating the panel, the tiny cracks at the edge of the panel at the peripheral part of the special-shaped processing will progress to the inside of the panel, and it is easy to cause brightness on the display screen of the device. Wire. Therefore, it is strongly required to suppress the undesirable situation.
本發明提供一種積層光學薄膜,其適於抑制光學薄膜之端部的損傷。The present invention provides a laminated optical film suitable for suppressing damage at the end of the optical film.
用以解決課題之手段 本發明[1]包含一種積層光學薄膜,係於厚度方向上依序具備第1光學薄膜、接著劑層及第2光學薄膜者;前述接著劑層係與前述第1光學薄膜接合,且與前述第2光學薄膜接合;前述接著劑層具有延長端部,在與前述厚度方向正交之面方向上,該延長端部係較前述第1光學薄膜之第1端緣及前述第2光學薄膜之第2端緣更向外延長。 means to solve problems The present invention [1] includes a laminated optical film comprising a first optical film, an adhesive layer, and a second optical film sequentially in the thickness direction; the adhesive layer is joined to the first optical film, and is bonded to the aforementioned Bonding of the second optical film; the aforementioned adhesive layer has an extended end portion, and in the plane direction perpendicular to the aforementioned thickness direction, the extended end portion is shorter than the first edge of the aforementioned first optical film and the edge of the aforementioned second optical film The second end edge is further extended outward.
本積層光學薄膜中,如上述,被第1光學薄膜與第2光學薄膜包夾之接著劑層具有較兩光學薄膜更向外延長之延長端部。在存在所述延長端部之處,例如在外部構件從面方向外接近而對積層光學薄膜衝撞時,較兩光學薄膜更向外延長之延長端部會承受外部構件之衝撞。藉此,能阻止外部構件進一步之接近,而防止外部構件對第1光學薄膜之第1端緣與第2光學薄膜之第2端緣之衝撞。或者,即使外部構件衝撞到第1端緣及/或第2端緣,仍能緩和對該等端部之衝撞力。所述衝撞之防止及衝撞力之緩和適於在積層光學薄膜中抑制光學薄膜之端部的損傷。並且,本積層光學薄膜之接著劑層具有延長端部這點適於抑制於第1、第2光學薄膜端部發生、成長微小裂痕。In this laminated optical film, as described above, the adhesive layer sandwiched by the first optical film and the second optical film has an extended end portion that extends outwardly beyond the two optical films. Where there is the extended end, for example, when the external member approaches the laminated optical film from the surface direction and collides with it, the extended end that is longer than the two optical films will receive the impact of the external member. Thereby, further approach of the external member can be prevented, and collision of the external member with respect to the first end edge of the first optical film and the second end edge of the second optical film can be prevented. Or, even if the external member collides with the first end edge and/or the second end edge, the impact force on these end portions can still be mitigated. The above-mentioned prevention of impact and mitigation of impact force are suitable for suppressing damage to the end of the optical film in the laminated optical film. In addition, the fact that the adhesive layer of this laminated optical film has extended end portions is suitable for suppressing the occurrence and growth of microcracks at the end portions of the first and second optical films.
本發明[2]包含如上述[1]之積層光學薄膜,其中前述第1光學薄膜係偏光件薄膜,且在前述面方向上,前述第1端緣係較前述第2端緣位於更外側。The present invention [2] includes the laminated optical film according to the above [1], wherein the first optical film is a polarizer film, and the first edge is located outside the second edge in the plane direction.
所述構成適宜在積層光學薄膜中抑制第2光學薄膜之第2端緣的損傷。Such a configuration is suitable for suppressing damage to the second edge of the second optical film in the laminated optical film.
本發明[3]包含如上述[1]或[2]之積層光學薄膜,其中前述延長端部在前述面方向上自前述第1端緣起算之延長長度為0.01µm以上且5µm以下。The present invention [3] includes the laminated optical film according to the above [1] or [2], wherein the extension length of the extended end portion from the first edge in the surface direction is 0.01 µm or more and 5 µm or less.
所述構成適宜在第1光學薄膜之第1端緣兼顧抑制損傷與抑制剝離。Such a configuration is suitable for achieving both the suppression of damage and the suppression of peeling at the first edge of the first optical film.
本發明[4]包含如上述[1]~[3]中任一項之積層光學薄膜,其中前述延長端部在前述面方向上自前述第2端緣起算之延長長度為0.03µm以上且10µm以下。The present invention [4] includes the laminated optical film according to any one of the above [1] to [3], wherein the extended length of the extended end portion from the second end edge in the direction of the surface is 0.03 µm or more and 10 µm the following.
所述構成適宜在第2光學薄膜之第2端緣兼顧抑制損傷與抑制剝離。Such a configuration is suitable for both the suppression of damage and the suppression of peeling at the second edge of the second optical film.
本發明[5]包含如上述[1]~[4]中任一項之積層光學薄膜,其中前述接著劑層具有之25℃下之壓痕彈性模數E1及前述接著劑層具有之80℃下之壓痕彈性模數E2滿足0.05≦E2/E1≦0.25。The present invention [5] includes the laminated optical film according to any one of the above [1] to [4], wherein the above-mentioned adhesive layer has an indentation elastic modulus E1 at 25°C and the above-mentioned adhesive layer has an indentation elastic modulus of 80°C The indentation elastic modulus E2 below satisfies 0.05≦E2/E1≦0.25.
所述構成適宜在歷經積層光學薄膜端部會升溫之薄膜外形加工來製造積層光學薄膜時形成上述延長端部。This configuration is suitable for forming the above-mentioned extended end portion when the laminated optical film is manufactured through film shape processing in which the temperature of the end portion of the laminated optical film is increased.
作為本發明積層光學薄膜之一實施形態的積層光學薄膜X,如圖1所示,具備光學薄膜10(第1光學薄膜)、光學薄膜20(第2光學薄膜)及接著劑層30。積層光學薄膜X具有預定厚度之薄片形狀,且於與厚度方向H正交之方向(面方向)上擴展。積層光學薄膜X具體上於厚度方向H上依序具備光學薄膜10、接著劑層30及光學薄膜20。接著劑層30係接合光學薄膜10、20間。又,積層光學薄膜X係一組入顯示面板之積層結構中的複合薄膜。積層光學薄膜X可為單片狀亦可為捲狀。A laminated optical film X which is an embodiment of the laminated optical film of the present invention includes an optical film 10 (first optical film), an optical film 20 (second optical film) and an
光學薄膜10在本實施形態中為機能性光學薄膜。機能性光學薄膜可舉例如偏光件薄膜及相位差薄膜。The
偏光件薄膜可舉例如經過利用二色性物質進行染色處理與其後之延伸處理的親水性高分子薄膜。二色性物質可舉例如碘及二色性染料。親水性高分子薄膜可舉例如聚乙烯醇(PVA)薄膜、部分縮甲醛化PVA薄膜及乙烯-乙酸乙烯酯共聚物之部分皂化薄膜。偏光件薄膜還可舉多烯定向薄膜。多烯定向薄膜之材料可舉例如PVA之脫水處理物及聚氯乙烯之脫鹽酸處理物。由偏光特性等光學特性優異來看,偏光件薄膜宜為經過利用碘進行染色處理與其後之單軸延伸處理的PVA薄膜。The polarizer film can be, for example, a hydrophilic polymer film that has been dyed with a dichroic substance and then stretched. Examples of dichroic substances include iodine and dichroic dyes. Examples of the hydrophilic polymer film include polyvinyl alcohol (PVA) film, partially formalized PVA film, and partially saponified film of ethylene-vinyl acetate copolymer. The polarizer film may also be a polyene oriented film. The material of the polyene oriented film can be, for example, dehydrated PVA and dehydrochloridized polyvinyl chloride. In view of excellent optical properties such as polarizing properties, the polarizer film is preferably a PVA film that has been dyed with iodine and then uniaxially stretched.
由薄型化之觀點來看,作為偏光件薄膜之光學薄膜10之厚度宜為15µm以下,較宜為12µm以下,更宜為10µm以下,尤宜為8µm以下。薄型偏光件薄膜因厚度參差少,故視辨性優異,且溫度變化所致之尺寸變化小,故對熱衝擊之耐久性優異。由強度之觀點來看,作為偏光件薄膜之光學薄膜10之厚度宜為3µm以上,較宜為5µm以上。From the viewpoint of thinning, the thickness of the
作為相位差薄膜,可舉例如λ/2波長薄膜及λ/4波長薄膜、以及視角補償薄膜。相位差薄膜之材料可舉例如藉由延伸處理而雙折射化之高分子薄膜。高分子薄膜之可舉例如纖維素薄膜及聚酯薄膜。纖維素薄膜可舉例如三醋酸纖維素薄膜。聚酯薄膜可舉例如聚對苯二甲酸乙二酯薄膜及聚萘二甲酸乙二酯薄膜。作為相位差薄膜之光學薄膜10之厚度例如為20µm以上,且例如為150µm以下。又,相位差薄膜亦可適宜使用具備纖維素薄膜等之基材與該基材上之液晶性聚合物等液晶化合物之定向層的薄膜。As a retardation film, a λ/2 wavelength film, a λ/4 wavelength film, and a viewing angle compensation film are mentioned, for example. The material of the retardation film can be, for example, a polymer film that is birefringent by stretching. Examples of polymer films include cellulose films and polyester films. The cellulose film may, for example, be a cellulose triacetate film. Examples of polyester films include polyethylene terephthalate films and polyethylene naphthalate films. The thickness of the
光學薄膜20在本實施形態中為透明保護薄膜。透明保護薄膜例如為具有可撓性之透明樹脂薄膜。透明保護薄膜之材料可列舉例如聚烯烴、聚酯、聚醯胺、聚醯亞胺、聚氯乙烯、聚二氯亞乙烯、纖維素、改質纖維素、聚苯乙烯及聚碳酸酯。聚烯烴可舉例如環烯烴聚合物(COP)、聚乙烯、聚丙烯、乙烯・丙烯共聚物、乙烯・乙酸乙烯酯共聚物及乙烯・乙烯醇共聚物。聚酯可舉例如聚對苯二甲酸乙二酯、聚萘二甲酸乙二酯及聚對苯二甲酸丁二酯。聚醯胺可舉例如聚醯胺6、聚醯胺6,6及部分芳香族聚醯胺。改質纖維素可舉例如三醋酸纖維素。該等材料可單獨使用,亦可併用二種以上。由潔淨度之觀點來看,透明保護薄膜之材料宜可使用聚烯烴,較宜可使用COP。又,光學薄膜20宜為單軸延伸薄膜或雙軸延伸薄膜。The
由積層光學薄膜X之強度之觀點來看,光學薄膜20之厚度宜為5µm以上,較宜為10µm以上,更宜為20µm以上。由積層光學薄膜X之薄型化之觀點來看,光學薄膜20之厚度宜為100µm以下,較宜為70µm以下,更宜為50µm以下。From the viewpoint of the strength of the laminated optical film X, the thickness of the
接著劑層30係接著劑組成物之硬化物。接著劑層30係對光學薄膜10直接接合,且對光學薄膜20直接接合。接著劑組成物含有硬化性樹脂。接著劑組成物之成分具體上如後所述。The
由光學薄膜10、20間之接合力之觀點來看,接著劑層30之厚度T1宜為0.1µm以上,較宜為0.4µm以上,更宜為0.7µm以上,尤宜為0.8µm以上。由積層光學薄膜X之薄型化之觀點來看,接著劑層30之厚度T1宜為5µm以下,較宜為3µm以下,更宜為1.5µm以下,尤宜為1µm以下。From the viewpoint of bonding force between the
如圖2所示,接著劑層30係於周端緣之至少一部分具有延長端部30a。在與厚度方向H正交之面方向上,延長端部30a係較光學薄膜10之端緣11(第1端緣)或光學薄膜20之端緣21(第2端緣)更向外(圖2中為圖中左方向)延長之部位。積層光學薄膜X中,在存在所述延長端部30a之處,例如如圖3所示在外部構件M從面方向外接近而對積層光學薄膜X衝撞時,較光學薄膜10、20更向外延長之延長端部30a會承受外部構件M之衝撞。藉此,能阻止外部構件M進一步之接近,而防止外部構件M對光學薄膜10之端緣11與光學薄膜20之端緣21之衝撞。或者,即使外部構件M衝撞到端緣11及/或端緣21,仍能緩和對該等端緣11、21之衝撞力。所述衝撞之防止及衝撞力之緩和適於在積層光學薄膜X中抑制光學薄膜10、20之端部損傷。並且,積層光學薄膜X之接著劑層30具有延長端部30a這點適於抑制於光學薄膜10、20之端部發生、成長微小裂痕。As shown in FIG. 2, the
光學薄膜10為偏光件薄膜且光學薄膜20為透明保護薄膜時,端緣11宜較端緣21位於更面方向外側。所述構成適宜在積層光學薄膜X中抑制光學薄膜20之端緣21的損傷。When the
延長端部30a在面方向上自端緣11起算之延長長度L1宜為0.01µm以上,較宜為0.05µm以上,更宜為0.1µm,尤宜為0.3µm以上。所述構成適宜抑制光學薄膜10之端緣11的損傷。又,延長長度L1宜為8µm以下,較宜為5µm以下,更宜為4µm以下,又更宜為3µm,尤宜為1µm以下。所述構成適宜在積層光學薄膜X被組入智慧型手機等顯示面板時,抑制因外形加工時過度延長之接著劑造成於面板端部產生殘膠,且適宜抑制該殘膠造成之顯示不均。延長長度L1具體上為光學薄膜10之端緣11與接著劑層30之端緣31之間的面方向的距離。The extended length L1 of the
延長端部30a在面方向上自端緣21起算之延長長度L2宜為0.03µm以上,較宜為0.1µm以上,更宜為0.3µm,尤宜為0.5µm以上。所述構成適宜抑制光學薄膜20之端緣21的損傷。又,延長長度L2宜為10µm以下,較宜為7µm以下,更宜為5µm,尤宜為3µm以下。所述構成適宜在光學薄膜20之端緣21抑制從接著劑層30之剝離。延長長度L2具體上為光學薄膜20之端緣21與接著劑層30之端緣31之間的面方向的距離。The extended length L2 of the
延長長度L2相對於延長長度L1之比率(L2/L1)宜為1.1以上,較宜為1.5以上,更宜為2以上,尤宜為2.5以上。比率(L2/L1)宜為10以下,較宜為8以下,更宜為7以下,尤宜為5以下。該等構成適宜兼顧光學薄膜10、20之上述之抑制損傷及抑制剝離。The ratio (L2/L1) of the extended length L2 to the extended length L1 is preferably at least 1.1, more preferably at least 1.5, more preferably at least 2, and particularly preferably at least 2.5. The ratio (L2/L1) is preferably 10 or less, more preferably 8 or less, more preferably 7 or less, particularly preferably 5 or less. These configurations suitably achieve both the aforementioned damage suppression and peeling suppression of the
接著劑層30利用奈米壓痕法測定之25℃下之壓痕彈性模數(壓痕彈性模數E1)宜為0.5GPa以上,較宜為1GPa以上,更宜為1.5GPa以上,尤宜為2GPa以上。所述構成由確保光學薄膜10、20間之接合力之觀點看來為佳。又,所述構成適宜確保延長端部30a之上述之阻止衝撞及緩和衝撞力之功能,且有助於兼顧光學薄膜10、20之上述之抑制損傷與抑制剝離。壓痕彈性模數E1宜為7GPa以下,較宜為5GPa以下,更宜為3GPa以下。所述構成適宜在將積層光學薄膜X用於可反覆彎折(折疊式)之顯示面板使用時確保接著劑層30之撓曲性。調整接著劑層30之壓痕彈性模數的方法,可舉例如調整接著劑組成物之組成。具體上,接著劑層30之壓痕彈性模數調整方法有效的是調整形成接著劑層30之接著劑組成物中之後述聚合性化合物之官能基數、即調整聚合性化合物之丙烯醯基當量或環氧當量。The indentation elastic modulus (indentation elastic modulus E1) of the
奈米壓痕法係指以奈米尺度測定試料之各物性的方法。本實施形態中,奈米壓痕法係依據ISO14577實施。奈米壓痕法係實施將壓頭壓入安裝於載台上之試料的過程(荷重施加過程)、與在此之後將壓頭從試料拉出之過程(卸重過程),測定一連串過程中在壓頭-試料間作用之荷重與壓頭對試料之相對位移(荷重-位移測定)。藉此,可獲得荷重-位移曲線。從該荷重-位移曲線,可針對測定試樣基於奈米尺度測定求出各物性。利用奈米壓痕法進行之接著劑層截面的荷重-位移測定,例如可使用奈米壓痕儀(商品名「Triboindenter」,Hysitron公司製)。具體上,如於後針對實施例所述。The nanoindentation method refers to the method of measuring various physical properties of the sample at the nanometer scale. In this embodiment, the nanoindentation method is carried out in accordance with ISO14577. The nanoindentation method is to implement the process of pressing the indenter into the sample installed on the stage (load application process), and then pull the indenter out of the sample (unloading process), and measure a series of processes The load acting between the indenter and the sample and the relative displacement of the indenter to the sample (load-displacement measurement). From this, a load-displacement curve can be obtained. From this load-displacement curve, various physical properties of the measurement sample can be determined based on nanoscale measurement. The load-displacement measurement of the cross section of the adhesive layer by the nanoindentation method can use, for example, a nanoindenter (trade name "Triboindenter", manufactured by Hysitron Corporation). Specifically, it is as described in the examples below.
接著劑層30利用奈米壓痕法測定之80℃下之壓痕彈性模數(壓痕彈性模數E2)宜為0.05GPa以上,較宜為0.1GPa以上,更宜為0.2GPa以上,尤宜為0.3GPa以上。所述構成適宜在積層光學薄膜X之端部會升溫之薄膜外形加工時,抑制接著劑層30之熱收縮,而形成上述延長端部30a。由接著劑層30之加工耐性之觀點來看,壓痕彈性模數E2宜為0.7GPa以下,較宜為0.5GPa以下,更宜為0.4GPa以下。The indentation elastic modulus (indentation elastic modulus E2) of the
壓痕彈性模數E1、E2宜滿足0.05≦E2/E1≦0.25。所述構成適宜在積層光學薄膜X之端部會升溫之薄膜外形加工時,抑制接著劑層30之熱收縮,而形成上述延長端部30a。E2/E1之值較宜為0.1以上,更宜為0.12以上,且較宜為0.2以下,更宜為0.18以下。The indentation elastic modulus E1 and E2 should satisfy 0.05≦E2/E1≦0.25. This configuration is suitable for forming the above-mentioned
積層光學薄膜X中,光學薄膜20在25℃下對光學薄膜10之90°剝離強度宜為1N/15mm以上,較宜為1.2N/15mm以上,更宜為1.5N/15mm以上。所述構成適宜實現光學薄膜10、20間之良好的接合力,尤其適宜確保折疊式顯示面板用之光學薄膜10、20之間的接合力。90°剝離強度例如為10N/15mm以下。90°剝離強度例如可使用TENSILON萬能試驗機(品名「RTC」,A&D Company, Limited製)來測定。本測定中,將測定溫度設為25℃,剝離角度設為90°,剝離速度設為1000mm/分鐘。又,90°剝離強度之調整方法可舉例如調整接著劑組成物之組成。具體上,90°剝離強度之調整方法可舉例如調整接著劑組成物中之後述聚合性化合物之官能基數、即調整聚合性化合物之丙烯醯基當量或環氧當量。In the laminated optical film X, the 90° peel strength of the
上述90°剝離強度(N/15mm)相對於壓痕彈性模數E2(GPa)之比率宜為5以上,較宜為10以上,更宜為15以上,且宜為30以下,較宜為25以下。所述構成由接著劑層30之加工耐性之觀點來看為佳。The ratio of the above 90° peel strength (N/15mm) to the indentation modulus E2 (GPa) is preferably 5 or more, more preferably 10 or more, more preferably 15 or more, and preferably 30 or less, more preferably 25 the following. Such a configuration is preferable from the viewpoint of the processing resistance of the
接著劑層30例如為含有活性能量線硬化型硬化性樹脂之接著劑組成物(活性能量線硬化型組成物)的硬化物。活性能量線硬化型組成物可舉例如電子束硬化型組成物、紫外線硬化型組成物及可見光線硬化型組成物。又,活性能量線硬化型組成物在本實施形態中為自由基聚合型組成物及陽離子聚合型組成物中之任一者或兩者。The
活性能量線硬化型組成物為自由基聚合物型組成物時,該組成物含有自由基聚合性化合物作為單體。自由基聚合性化合物係具有自由基聚合性官能基之化合物。自由基聚合性官能基可舉例如含乙烯性不飽和鍵之基。含乙烯性不飽和鍵之基可舉例如(甲基)丙烯醯基、乙烯基及烯丙基。(甲基)丙烯醯基意指丙烯醯基及/或甲基丙烯醯基。由活性能量線硬化型組成物之硬化性之觀點來看,活性能量線硬化型組成物宜含有具有(甲基)丙烯醯基之自由基聚合性化合物作為主成分。主成分意指以質量比率計最多的成分。活性能量線硬化型組成物中之含(甲基)丙烯醯基之自由基聚合性化合物之比率例如為50質量%以上,宜為70質量%以上,較宜為80質量%以上。又,自由基聚合性化合物可舉單官能自由基聚合性化合物及二官能以上之多官能自由基聚合性化合物。When the active energy ray-curable composition is a radical polymer composition, the composition contains a radical polymerizable compound as a monomer. The radically polymerizable compound is a compound having a radically polymerizable functional group. As a radical polymerizable functional group, the group containing an ethylenic unsaturated bond is mentioned, for example. The ethylenically unsaturated bond-containing group includes, for example, a (meth)acryl group, a vinyl group, and an allyl group. (Meth)acryl means acryl and/or methacryl. From the viewpoint of the curability of the active energy ray-curable composition, the active energy ray-curable composition preferably contains a radically polymerizable compound having a (meth)acryl group as a main component. The principal component means the most numerous component in terms of mass ratio. The ratio of the (meth)acryl group-containing radically polymerizable compound in the active energy ray-curable composition is, for example, 50% by mass or more, preferably 70% by mass or more, more preferably 80% by mass or more. Moreover, examples of the radical polymerizable compound include monofunctional radical polymerizable compounds and polyfunctional radical polymerizable compounds having more than two functions.
單官能自由基聚合性化合物可舉例如具有(甲基)丙烯醯胺基之(甲基)丙烯醯胺衍生物。(甲基)丙烯醯胺衍生物可列舉:含N-烷基之(甲基)丙烯醯胺衍生物、含N-羥烷基之(甲基)丙烯醯胺衍生物、含N-胺烷基之(甲基)丙烯醯胺衍生物、含N-烷氧基之(甲基)丙烯醯胺衍生物及含N-巰基烷基之(甲基)丙烯醯胺衍生物。含N-烷基之(甲基)丙烯醯胺衍生物可列舉例如:N-甲基(甲基)丙烯醯胺、N,N-二甲基(甲基)丙烯醯胺、N,N-二乙基(甲基)丙烯醯胺、N-異丙基(甲基)丙烯醯胺、N-丁基(甲基)丙烯醯胺及N-己基(甲基)丙烯醯胺,宜使用N,N-二乙基丙烯醯胺。含N-羥烷基之(甲基)丙烯醯胺衍生物可列舉例如:N-羥甲基(甲基)丙烯醯胺、N-羥乙基(甲基)丙烯醯胺及N-羥甲基-N-丙烷(甲基)丙烯醯胺,宜可使用N-羥乙基丙烯醯胺。(甲基)丙烯醯胺衍生物可單獨使用,亦可併用二種以上。As a monofunctional radically polymerizable compound, the (meth)acrylamide derivative which has a (meth)acrylamide group is mentioned, for example. Examples of (meth)acrylamide derivatives include N-alkyl-containing (meth)acrylamide derivatives, N-hydroxyalkyl-containing (meth)acrylamide derivatives, N-aminoalkyl-containing (meth)acrylamide derivatives containing N-alkoxy groups, (meth)acrylamide derivatives containing N-alkoxy groups, and (meth)acrylamide derivatives containing N-mercaptoalkyl groups. N-alkyl-containing (meth)acrylamide derivatives include, for example: N-methyl(meth)acrylamide, N,N-dimethyl(meth)acrylamide, N,N- Diethyl (meth)acrylamide, N-isopropyl (meth)acrylamide, N-butyl (meth)acrylamide and N-hexyl (meth)acrylamide, preferably N , N-Diethylacrylamide. Examples of (meth)acrylamide derivatives containing N-hydroxyalkyl include: N-methylol (meth)acrylamide, N-hydroxyethyl (meth)acrylamide and N-methylol (meth)acrylamide N-propane (meth)acrylamide, preferably N-hydroxyethylacrylamide. The (meth)acrylamide derivatives may be used alone or in combination of two or more.
單官能自由基聚合性化合物可舉例如具有(甲基)丙烯醯氧基之(甲基)丙烯酸衍生物。該(甲基)丙烯酸衍生物可舉例如(甲基)丙烯酸烷基酯及(甲基)丙烯酸烷基酯以外之(甲基)丙烯酸衍生物。(甲基)丙烯酸衍生物可單獨使用,亦可併用二種以上。As a monofunctional radically polymerizable compound, the (meth)acrylic acid derivative which has a (meth)acryloxy group is mentioned, for example. Examples of the (meth)acrylic acid derivative include (meth)acrylic acid derivatives other than alkyl (meth)acrylate and alkyl (meth)acrylate. The (meth)acrylic acid derivatives may be used alone or in combination of two or more.
(甲基)丙烯酸烷基酯類可列舉例如:(甲基)丙烯酸甲酯、(甲基)丙烯酸乙酯、(甲基)丙烯酸正丙酯、(甲基)丙烯酸異丙酯、(甲基)丙烯酸正丁酯、(甲基)丙烯酸異丁酯、(甲基)丙烯酸正戊酯、(甲基)丙烯酸2,2-二甲基丁酯、(甲基)丙烯酸正己酯、(甲基)丙烯酸正辛酯、(甲基)丙烯酸2-乙基己酯、4-甲-2-丙基戊基(甲基)丙烯酸酯及(甲基)丙烯酸正十八烷基酯。Alkyl (meth)acrylates include, for example: methyl (meth)acrylate, ethyl (meth)acrylate, n-propyl (meth)acrylate, isopropyl (meth)acrylate, (meth)acrylate ) n-butyl acrylate, isobutyl (meth) acrylate, n-pentyl (meth) acrylate, 2,2-dimethyl butyl (meth) acrylate, n-hexyl (meth) acrylate, (meth) ) n-octyl acrylate, 2-ethylhexyl (meth)acrylate, 4-methyl-2-propylpentyl (meth)acrylate and n-octadecyl (meth)acrylate.
(甲基)丙烯酸烷基酯以外之(甲基)丙烯酸衍生物可舉例如(甲基)丙烯酸環烷基酯、(甲基)丙烯酸芳烷基酯、含羥基之(甲基)丙烯酸衍生物、含烷氧基之(甲基)丙烯酸衍生物及含苯氧基之(甲基)丙烯酸衍生物。(甲基)丙烯酸環烷基酯可舉例如(甲基)丙烯酸環己酯及(甲基)丙烯酸環戊酯。(甲基)丙烯酸芳烷基酯可舉例如(甲基)丙烯酸苄酯及3-苯氧基苄基(甲基)丙烯酸酯。含羥基之(甲基)丙烯酸衍生物可列舉例如:(甲基)丙烯酸2-羥乙酯、(甲基)丙烯酸2-羥丙酯、(甲基)丙烯酸3-羥丙酯、(甲基)丙烯酸2-羥丁酯、(甲基)丙烯酸4-羥丁酯、[4-(羥甲基)環己基]甲基丙烯酸酯及2-羥-3-苯氧基丙基(甲基)丙烯酸酯。含烷氧基之(甲基)丙烯酸衍生物可舉例如2-甲氧基乙基(甲基)丙烯酸酯、2-乙氧基乙基(甲基)丙烯酸酯及3-甲氧基丁基(甲基)丙烯酸酯。含苯氧基之(甲基)丙烯酸衍生物可舉例如(甲基)丙烯酸苯氧乙酯及苯氧基二乙二醇(甲基)丙烯酸酯。(甲基)丙烯酸烷基酯以外之(甲基)丙烯酸衍生物宜可使用選自於由3-苯氧基苄基丙烯酸酯、2-羥-3-苯氧基丙基丙烯酸酯及苯氧基二乙二醇丙烯酸酯所構成群組中之至少一者。Examples of (meth)acrylic acid derivatives other than alkyl (meth)acrylates include cycloalkyl (meth)acrylates, aralkyl (meth)acrylates, and hydroxyl-containing (meth)acrylic acid derivatives. , Alkoxy-containing (meth)acrylic acid derivatives and phenoxy-containing (meth)acrylic acid derivatives. As cycloalkyl (meth)acrylate, cyclohexyl (meth)acrylate and cyclopentyl (meth)acrylate are mentioned, for example. Examples of aralkyl (meth)acrylate include benzyl (meth)acrylate and 3-phenoxybenzyl (meth)acrylate. Examples of hydroxyl-containing (meth)acrylic acid derivatives include: 2-hydroxyethyl (meth)acrylate, 2-hydroxypropyl (meth)acrylate, 3-hydroxypropyl (meth)acrylate, (meth)acrylate ) 2-hydroxybutyl acrylate, 4-hydroxybutyl (meth)acrylate, [4-(hydroxymethyl)cyclohexyl]methacrylate and 2-hydroxy-3-phenoxypropyl (methyl) Acrylate. Alkoxy-containing (meth)acrylic acid derivatives include, for example, 2-methoxyethyl (meth)acrylate, 2-ethoxyethyl (meth)acrylate and 3-methoxybutyl (meth)acrylates. Examples of phenoxy-containing (meth)acrylic acid derivatives include phenoxyethyl (meth)acrylate and phenoxydiethylene glycol (meth)acrylate. (Meth)acrylic acid derivatives other than alkyl (meth)acrylates are preferably selected from 3-phenoxybenzyl acrylate, 2-hydroxy-3-phenoxypropyl acrylate and phenoxy At least one of the group consisting of diethylene glycol acrylate.
單官能自由基聚合性化合物還可舉含羧基單體。含羧基單體例如可舉例如(甲基)丙烯酸、丙烯酸羧乙酯、丙烯酸羧戊酯、伊康酸、馬來酸、延胡索酸、巴豆酸及異巴豆酸。Carboxyl group-containing monomers are also mentioned as a monofunctional radically polymerizable compound. Examples of carboxyl group-containing monomers include (meth)acrylic acid, carboxyethyl acrylate, carboxypentyl acrylate, itaconic acid, maleic acid, fumaric acid, crotonic acid, and isocrotonic acid.
單官能自由基聚合性化合物還可舉內醯胺系乙烯基單體。內醯胺系乙烯基單體可舉例如N-乙烯基-2-吡咯啶酮、N-乙烯基-ε-己內醯胺及甲基乙烯基吡咯啶酮。Examples of the monofunctional radically polymerizable compound include lactamide-based vinyl monomers. Examples of lactam-based vinyl monomers include N-vinyl-2-pyrrolidone, N-vinyl-ε-caprolactam, and methylvinylpyrrolidone.
單官能自由基聚合性化合物還可舉具有含氮雜環之乙烯基系單體。該單體可列舉例如:乙烯基吡啶、乙烯基哌啶酮、乙烯基嘧啶、乙烯基哌𠯤、乙烯基吡𠯤、乙烯基吡咯、乙烯基咪唑、乙烯基㗁唑及乙烯基嗎福林。As the monofunctional radically polymerizable compound, a vinyl-based monomer having a nitrogen-containing heterocycle can also be mentioned. Examples of such monomers include vinylpyridine, vinylpiperidone, vinylpyrimidine, vinylpiperidone, vinylpyridine, vinylpyrrole, vinylimidazole, vinyloxazole, and vinylmorphine.
多官能自由基聚合性化合物可使用例如:三丙二醇二(甲基)丙烯酸酯、四乙二醇二(甲基)丙烯酸酯、1,6-己二醇二(甲基)丙烯酸酯、1,9-壬二醇二(甲基)丙烯酸酯、1,10-癸二醇二丙烯酸酯、2-乙-2-丁基丙二醇二(甲基)丙烯酸酯、新戊二醇二(甲基)丙烯酸酯、三環癸烷二甲醇二(甲基)丙烯酸酯、環狀三羥甲丙烷縮甲醛(甲基)丙烯酸酯、二㗁烷二醇二(甲基)丙烯酸酯、三羥甲丙烷三(甲基)丙烯酸酯、新戊四醇三(甲基)丙烯酸酯、新戊四醇四(甲基)丙烯酸酯、二新戊四醇五(甲基)丙烯酸酯及二新戊四醇六(甲基)丙烯酸酯,宜可使用三丙二醇二丙烯酸酯。多官能自由基聚合性化合物可單獨使用,亦可併用二種以上。多官能自由基聚合性化合物可作為交聯劑發揮功能。As the polyfunctional radically polymerizable compound, for example, tripropylene glycol di(meth)acrylate, tetraethylene glycol di(meth)acrylate, 1,6-hexanediol di(meth)acrylate, 1, 9-nonanediol di(meth)acrylate, 1,10-decanediol diacrylate, 2-Eth-2-butylpropanediol di(meth)acrylate, neopentyl glycol di(meth)acrylate Acrylates, tricyclodecane dimethanol di(meth)acrylate, cyclic trimethylolpropane formal (meth)acrylate, dioxanediol di(meth)acrylate, trimethylolpropane trimethylolpropane (Meth)acrylate, neopentylthritol tri(meth)acrylate, neopentylthritol tetra(meth)acrylate, diperythritol penta(meth)acrylate and diperythritol hexa(meth)acrylate As (meth)acrylate, tripropylene glycol diacrylate is preferably used. The polyfunctional radically polymerizable compound may be used alone or in combination of two or more. A polyfunctional radically polymerizable compound can function as a crosslinking agent.
活性能量線硬化型組成物為紫外線硬化型組成物或可見光線硬化型組成物時,活性能量線硬化型組成物宜含有光聚合引發劑。光聚合引發劑可舉例如二苯基酮化合物、苯偶姻醚化合物及9-氧硫𠮿化合物。二苯基酮化合物可舉例如苄基、二苯基酮、苯甲醯苯甲酸及3,3'-二甲基-4-甲氧基二苯基酮。苯偶姻醚化合物可舉例如苯偶姻甲醚、苯偶姻乙醚、苯偶姻異丙醚及苯偶姻異丁醚。9-氧硫𠮿化合物可列舉例如:9-氧硫𠮿、2-氯9-氧硫𠮿、2-甲基9-氧硫𠮿、2,4-二甲基9-氧硫𠮿、異丙基9-氧硫𠮿、2,4-二氯9-氧硫𠮿、2,4-二乙基9-氧硫𠮿、2,4-二異丙基9-氧硫𠮿及十二基9-氧硫𠮿。When the active energy ray-curable composition is an ultraviolet ray-curable composition or a visible ray-curable composition, the active energy ray-curable composition preferably contains a photopolymerization initiator. Photopolymerization initiators can be, for example, benzophenone compounds, benzoin ether compounds and 9-oxothiophene compound. Examples of the diphenyl ketone compound include benzyl, diphenyl ketone, benzoylbenzoic acid and 3,3'-dimethyl-4-methoxy diphenyl ketone. Examples of benzoin ether compounds include benzoin methyl ether, benzoin ethyl ether, benzoin isopropyl ether and benzoin isobutyl ether. 9-oxosulfur Compounds can be listed for example: 9-oxosulfur , 2-Chloro9-oxosulfur 𠮿 , 2-methyl 9-oxosulfur 𠮿 , 2,4-Dimethyl 9-oxosulfur 𠮿 , Isopropyl 9-oxosulfur , 2,4-dichloro-9-oxosulfur 𠮿 , 2,4-Diethyl 9-oxosulfur 𠮿 , 2,4-Diisopropyl 9-oxosulfur 𠮿 and dodecyl 9-oxosulfur .
活性能量線硬化型組成物為可見光線硬化型組成物時,宜可使用對380nm以上之光有高感度之光聚合引發劑。所述光聚合引發劑可列舉例如:2-甲-1-(4-甲硫基苯基)-2-嗎福林基丙-1-酮、2-苄-2-二甲胺基-1-(4-嗎福林基苯基)-丁-1-酮、2-(二甲胺基)-2-[(4-甲基苯基)甲基]-1-[4-(4-嗎福林基)苯基]-1-丁酮、2,4,6-三甲基苯甲醯基-二苯基-膦氧化物、雙(2,4,6-三甲基苯甲醯基)-苯基膦氧化物及雙(η5-2,4-環戊二烯-1-基)-雙(2,6-二氟-3-(1H-吡咯-1-基)-苯基)鈦。When the active energy ray curable composition is a visible ray curable composition, it is preferable to use a photopolymerization initiator having high sensitivity to light of 380 nm or more. The photopolymerization initiator can be exemplified, for example: 2-methyl-1-(4-methylthiophenyl)-2-morpholinopropan-1-one, 2-benzyl-2-dimethylamino-1 -(4-morpholinylphenyl)-butan-1-one, 2-(dimethylamino)-2-[(4-methylphenyl)methyl]-1-[4-(4- Morpholinyl)phenyl]-1-butanone, 2,4,6-trimethylbenzoyl-diphenyl-phosphine oxide, bis(2,4,6-trimethylbenzoyl base)-phenylphosphine oxide and bis(η5-2,4-cyclopentadien-1-yl)-bis(2,6-difluoro-3-(1H-pyrrol-1-yl)-phenyl )titanium.
光聚合引發劑宜使用2,4-二乙基9-氧硫𠮿、及/或2-甲基-1-(4-甲硫基苯基)-2-嗎福林基丙-1-酮。The photopolymerization initiator should use 2,4-diethyl 9-oxosulfur , and/or 2-methyl-1-(4-methylthiophenyl)-2-morpholinopropan-1-one.
相對於硬化性成分(自由基聚合性化合物)100質量份,活性能量線硬化型組成物中之光聚合引發劑之含量宜為0.1質量份以上,較宜為0.05質量份以上,更宜為0.1質量份以上,且宜為20質量份以下,較宜為10質量份以下,更宜為5質量份以下。The content of the photopolymerization initiator in the active energy ray-curable composition is preferably at least 0.1 parts by mass, more preferably at least 0.05 parts by mass, more preferably 0.1 parts by mass relative to 100 parts by mass of the curable component (radical polymerizable compound). More than 20 parts by mass, preferably less than 10 parts by mass, more preferably less than 5 parts by mass.
活性能量線硬化型組成物為陽離子聚合物型組成物時,該組成物含有陽離子聚合性化合物作為單體。陽離子聚合性化合物係具有陽離子聚合性官能基之化合物,其包含具有一個陽離子聚合性官能基之單官能陽離子聚合性化合物與具有二個以上陽離子聚合性官能基之多官能陽離子聚合性化合物。單官能陽離子聚合性化合物之液體黏度相對較低。藉由將所述單官能陽離子聚合性化合物摻混於樹脂組成物中,可降低該樹脂組成物之黏度。又,單官能陽離子聚合性化合物大多具有能展現各種功能之官能基。藉由將所述單官能陽離子聚合性化合物摻混於樹脂組成物中,可使該樹脂組成物及/或樹脂組成物的硬化物展現各種功能。另一方面,藉由摻合有多官能陽離子聚合性化合物之樹脂組成物的硬化,可獲得具有3維交聯部之硬化物(多官能陽離子聚合性化合物係作為交聯劑發揮功能)。由所述觀點來看,宜利用多官能陽離子聚合性化合物。併用單官能陽離子聚合性化合物與多官能陽離子聚合性化合物時,相對於單官能陽離子聚合性化合物100質量份,多官能陽離子聚合性化合物之量例如為10質量份以上,且例如為1000質量份以下。陽離子聚合性官能基可舉例如環氧基、氧雜環丁烷基及乙烯基醚基。具有環氧基之化合物可舉例如脂肪族環氧化合物、脂環式環氧化合物及芳香族環氧化合物。由陽離子聚合型組成物之硬化性及接著性之觀點來看,具環氧基之化合物宜可使用脂環式環氧化合物。脂環式環氧化合物可舉例如:3,4-環氧環己基甲基-3,4-環氧環己烷羧酸酯、或3,4-環氧環己基甲基-3,4-環氧環己烷羧酸酯的己內酯改質物、三甲基己內酯改質物及戊內酯改質物。脂環式環氧化合物之市售物可舉例如CELLOXIDE 2021、CELLOXIDE 2021A、CELLOXIDE 2021P、CELLOXIDE 2081、CELLOXIDE 2083及CELLOXIDE 2085(以上為DAICEL化學工業公司製),且可舉Cyracure UVR-6105、Cyracure UVR-6107、Cyracure 30及R-6110(以上為DOW CHEMICAL日本公司製)。由陽離子聚合型組成物之硬化性改善及黏度降低之觀點來看,宜使用具有氧雜環丁烷基之化合物、及/或具有乙烯基醚基之化合物。具有氧雜環丁烷基之化合物可列舉例如:3-乙-3-羥甲基氧雜環丁烷、1,4-雙[(3-乙-3-氧雜環丁烷基)甲氧基甲基]苯、3-乙-3-(苯氧基甲基)氧雜環丁烷、二[(3-乙-3-氧雜環丁烷基)甲基]醚、3-乙-3-(2-乙基己氧基甲基)氧雜環丁烷、苯酚酚醛清漆氧雜環丁烷等。具有氧雜環丁烷基之化合物之市售物可舉例如:ARON OXETANE OXT-101、ARON OXETANE OXT-121、ARON OXETANE OXT-211、ARON OXETANE OXT-221、ARON OXETANE OXT-212(以上,東亞合成公司製)。具有乙烯基醚基之化合物可列舉例如:2-羥乙基乙烯基醚、二乙二醇單乙烯基醚、4-羥丁基乙烯基醚、二乙二醇單乙烯基醚、三乙二醇二乙烯基醚、環己烷二甲醇二乙烯基醚、環己烷二甲醇單乙烯基醚、三環癸烷乙烯基醚、環己基乙烯基醚、甲氧基乙基乙烯基醚、乙氧基乙基乙烯基醚及新戊四醇型四乙烯基醚。When the active energy ray-curable composition is a cationic polymer composition, the composition contains a cationic polymerizable compound as a monomer. The cationic polymerizable compound is a compound having a cationic polymerizable functional group, which includes a monofunctional cationic polymerizable compound with one cationic polymerizable functional group and a multifunctional cationic polymerizable compound with two or more cationic polymerizable functional groups. The liquid viscosity of the monofunctional cationic polymerizable compound is relatively low. By blending the monofunctional cationic polymerizable compound into the resin composition, the viscosity of the resin composition can be reduced. Moreover, many monofunctional cationically polymerizable compounds have functional groups capable of exhibiting various functions. By blending the monofunctional cationic polymerizable compound into the resin composition, the resin composition and/or the cured product of the resin composition can exhibit various functions. On the other hand, a cured product having a three-dimensional crosslinked portion can be obtained by curing a resin composition blended with a polyfunctional cationic polymerizable compound (the polyfunctional cationic polymerizable compound functions as a crosslinking agent). From such a viewpoint, it is preferable to use a polyfunctional cation polymerizable compound. When a monofunctional cation polymerizable compound and a polyfunctional cation polymerizable compound are used together, the amount of the polyfunctional cation polymerizable compound is, for example, 10 parts by mass or more and, for example, 1000 parts by mass or less with respect to 100 parts by mass of the monofunctional cation polymerizable compound . The cationic polymerizable functional group may, for example, be an epoxy group, an oxetanyl group or a vinyl ether group. The compound having an epoxy group includes, for example, aliphatic epoxy compounds, alicyclic epoxy compounds, and aromatic epoxy compounds. From the viewpoint of hardening and adhesiveness of the cationic polymer composition, it is preferable to use an alicyclic epoxy compound as the compound having an epoxy group. Alicyclic epoxy compounds can be, for example: 3,4-epoxycyclohexylmethyl-3,4-epoxycyclohexanecarboxylate, or 3,4-epoxycyclohexylmethyl-3,4- Caprolactone-modified, trimethylcaprolactone-modified, and valerolactone-modified substances of epoxycyclohexane carboxylate. Commercially available alicyclic epoxy compounds include, for example, CELLOXIDE 2021, CELLOXIDE 2021A, CELLOXIDE 2021P, CELLOXIDE 2081, CELLOXIDE 2083, and CELLOXIDE 2085 (manufactured by DAICEL Chemical Industry Co., Ltd.), and Cyracure UVR-6105, Cyracure UVR -6107,
活性能量線硬化型組成物為紫外線硬化型組成物或可見光線硬化型組成物時,活性能量線硬化型組成物含有光陽離子聚合引發劑。光陽離子聚合引發劑受到活性能量線(可見光線、紫外線、X射線、電子束等)之照射,會產生陽離子種或路易斯酸,引發陽離子聚合性官能基之聚合反應。光陽離子聚合引發劑可舉光酸產生劑及光鹼產生劑,宜可使用光酸產生劑。活性能量線硬化型組成物採用可見光線硬化型組成物時,尤宜使用對380nm以上的光有高感度之光陽離子聚合引發劑。又,使用光陽離子聚合引發劑時,宜併用對波長較380nm更長之光顯示極大吸收之光敏劑。光陽離子聚合引發劑一般而言係一在300nm附近或較其更短之波長區域顯示極大吸收之化合物,故藉由併用在波長較380nm更長之光顯示極大吸收之光敏劑,可有效利用波長較380nm更長之光,來促進來自光陽離子聚合引發劑之陽離子種或路易斯酸的產生。光敏劑可列舉例如蒽化合物、芘化合物、羰基化合物、有機硫化合物、過硫化物、氧化還原系化合物、偶氮化合物、雙偶氮化合物、鹵素化合物及光還原性色素。該等可單獨使用,亦可併用二種以上。尤其蒽化合物因光敏化效果優異,故理想。作為光敏劑之蒽化合物之市售物可舉例如ANTHRACURE UVS-1331及ANTHRACURE UVS-1221(川崎化成公司製)。組成物中之光敏劑之含量例如為0.1~5重量%。When the active energy ray-curable composition is an ultraviolet ray-curable composition or a visible ray-curable composition, the active energy ray-curable composition contains a photocationic polymerization initiator. When the photocationic polymerization initiator is irradiated by active energy rays (visible light, ultraviolet rays, X-rays, electron beams, etc.), it will generate cationic species or Lewis acid, and initiate the polymerization reaction of cationic polymerizable functional groups. Examples of photocationic polymerization initiators include photoacid generators and photobase generators, preferably photoacid generators. Active energy ray curable composition When a visible ray curable composition is used, it is particularly preferable to use a photocationic polymerization initiator that is highly sensitive to light above 380 nm. Moreover, when using a photocationic polymerization initiator, it is preferable to use together the photosensitizer which shows the maximum absorption with respect to the light of wavelength longer than 380 nm. A photocationic polymerization initiator is generally a compound that exhibits maximum absorption in a wavelength region near 300nm or shorter, so by using a photosensitizer that exhibits maximum absorption at a wavelength longer than 380nm, the wavelength can be effectively used Light longer than 380nm is used to promote the generation of cationic species or Lewis acids from photocationic polymerization initiators. Examples of photosensitizers include anthracene compounds, pyrene compounds, carbonyl compounds, organosulfur compounds, persulfide compounds, redox compounds, azo compounds, disazo compounds, halogen compounds, and photoreducible dyes. These may be used alone or in combination of two or more. In particular, an anthracene compound is preferable because of its excellent photosensitization effect. Commercially available products of an anthracene compound as a photosensitizer include, for example, ANTHRACURE UVS-1331 and ANTHRACURE UVS-1221 (manufactured by Kawasaki Chemical Co., Ltd.). The content of the photosensitizer in the composition is, for example, 0.1 to 5% by weight.
活性能量線硬化型組成物亦可含有寡聚物。寡聚物可舉丙烯酸寡聚物、氟寡聚物及聚矽氧寡聚物,宜可使用丙烯酸寡聚物。寡聚物對活性能量線硬化型組成物之摻混有助於抑制該組成物在硬化時收縮。活性能量線硬化型組成物的硬化收縮之抑制適宜降低所形成之接著劑層30與光學薄膜10、20之間的界面應力。界面應力之抑制有助於確保光學薄膜10、20間之接合力。The active energy ray curable composition may also contain an oligomer. Examples of oligomers include acrylic oligomers, fluorine oligomers, and polysiloxane oligomers, preferably acrylic oligomers. The blending of the oligomer into the active energy ray curable composition helps to suppress the shrinkage of the composition when cured. Suppression of curing shrinkage of the active energy ray-curable composition is suitable for reducing the interface stress between the formed
形成丙烯酸寡聚物之(甲基)丙烯酸單體可列舉例如:碳數1~20之(甲基)丙烯酸烷基酯、(甲基)丙烯酸環烷基酯、(甲基)丙烯酸芳烷基酯、多環式(甲基)丙烯酸酯、含羥基之(甲基)丙烯酸酯及含鹵素之(甲基)丙烯酸酯。(甲基)丙烯酸烷基酯可列舉例如:(甲基)丙烯酸甲酯、(甲基)丙烯酸乙酯、(甲基)丙烯酸正丙酯、(甲基)丙烯酸異丙酯、2-甲-2-硝丙基(甲基)丙烯酸酯、(甲基)丙烯酸正丁酯、(甲基)丙烯酸異丁酯、(甲基)丙烯酸S-丁酯、(甲基)丙烯酸三級丁酯、(甲基)丙烯酸正戊酯、(甲基)丙烯酸三級戊酯、(甲基)丙烯酸3-戊酯、2,2-二甲基丁基(甲基)丙烯酸酯、(甲基)丙烯酸正己酯、(甲基)丙烯酸鯨蠟酯、(甲基)丙烯酸正辛酯、(甲基)丙烯酸2-乙基己酯、4-甲-2-丙基戊基(甲基)丙烯酸酯及N-十八基(甲基)丙烯酸酯。(甲基)丙烯酸環烷基酯可舉例如(甲基)丙烯酸環己酯及(甲基)丙烯酸環戊酯。(甲基)丙烯酸芳烷基酯可舉例如(甲基)丙烯酸苄酯。多環式(甲基)丙烯酸酯可舉例如(甲基)丙烯酸2-異莰酯、(甲基)丙烯酸2-降莰基甲酯、5-降莰烯-2-基-甲基(甲基)丙烯酸酯及3-甲-2-降莰基甲基(甲基)丙烯酸酯。含羥基之(甲基)丙烯酸酯可舉例如(甲基)丙烯酸羥乙酯、(甲基)丙烯酸2-羥丙酯、2,3-二羥丙基甲基-丁基(甲基)甲基丙烯酸酯。含鹵素之(甲基)丙烯酸酯可列舉例如:2,2,2-三氟乙基(甲基)丙烯酸酯、2,2,2-三氟乙基乙基(甲基)丙烯酸酯、四氟丙基(甲基)丙烯酸酯、六氟丙基(甲基)丙烯酸酯、八氟戊基(甲基)丙烯酸酯、十七氟癸基(甲基)丙烯酸酯。該等(甲基)丙烯酸酯可單獨使用,亦可併用二種以上。Examples of (meth)acrylic monomers that form acrylic acid oligomers include alkyl (meth)acrylates with 1 to 20 carbon atoms, cycloalkyl (meth)acrylates, and aralkyl (meth)acrylates. esters, polycyclic (meth)acrylates, hydroxyl-containing (meth)acrylates and halogen-containing (meth)acrylates. Alkyl (meth)acrylates include, for example: methyl (meth)acrylate, ethyl (meth)acrylate, n-propyl (meth)acrylate, isopropyl (meth)acrylate, 2-methyl- 2-Nitropropyl (meth)acrylate, n-butyl (meth)acrylate, isobutyl (meth)acrylate, S-butyl (meth)acrylate, tertiary butyl (meth)acrylate, n-pentyl (meth)acrylate, tertiary pentyl (meth)acrylate, 3-pentyl (meth)acrylate, 2,2-dimethylbutyl (meth)acrylate, (meth)acrylic acid n-hexyl ester, cetyl (meth)acrylate, n-octyl (meth)acrylate, 2-ethylhexyl (meth)acrylate, 4-methyl-2-propylpentyl (meth)acrylate and N-octadecyl(meth)acrylate. As cycloalkyl (meth)acrylate, cyclohexyl (meth)acrylate and cyclopentyl (meth)acrylate are mentioned, for example. As for aralkyl (meth)acrylate, benzyl (meth)acrylate is mentioned, for example. Polycyclic (meth)acrylates can be exemplified by 2-isobornyl (meth)acrylate, 2-norbornyl methyl (meth)acrylate, 5-norbornen-2-yl-methyl (meth)acrylate base) acrylate and 3-methyl-2-norbornyl methyl (meth)acrylate. Hydroxyl-containing (meth)acrylates include, for example, hydroxyethyl (meth)acrylate, 2-hydroxypropyl (meth)acrylate, 2,3-dihydroxypropylmethyl-butyl (meth)methacrylate base acrylate. Halogen-containing (meth)acrylates include, for example: 2,2,2-trifluoroethyl (meth)acrylate, 2,2,2-trifluoroethylethyl (meth)acrylate, tetrafluoroethyl (meth)acrylate, Fluoropropyl (meth)acrylate, hexafluoropropyl (meth)acrylate, octafluoropentyl (meth)acrylate, heptadecylfluorodecyl (meth)acrylate. These (meth)acrylates may be used alone or in combination of two or more.
丙烯酸寡聚物之重量平均分子量(Mw)宜為15000以下,較宜為10000以下,更宜為5000以下。丙烯酸寡聚物之Mw宜為500以上,較宜為1000以上,更宜為1500以上。The weight average molecular weight (Mw) of the acrylic acid oligomer is preferably 15,000 or less, more preferably 10,000 or less, more preferably 5,000 or less. The Mw of the acrylic acid oligomer is preferably not less than 500, more preferably not less than 1000, more preferably not less than 1500.
活性能量線硬化型組成物中之丙烯酸寡聚物之含量宜為2質量%以上,較宜為4質量%以上,且宜為20質量%以下,較宜為15質量%以下。The content of the acrylic acid oligomer in the active energy ray curable composition is preferably at least 2% by mass, more preferably at least 4% by mass, and is preferably at most 20% by mass, more preferably at most 15% by mass.
活性能量線硬化型組成物亦可含有其他成分。其他成分可舉矽烷耦合劑、調平劑、界面活性劑、塑化劑及紫外線吸收劑。相對於硬化性成分100質量份,該其他成分之摻混量宜為10質量份以下,較宜為5質量份以下,更宜為3質量份以下,且例如為0.01質量份以上。The active energy ray curing composition may contain other components. Other components include silane coupling agent, leveling agent, surfactant, plasticizer and ultraviolet absorber. The blending amount of the other components is preferably not more than 10 parts by mass, more preferably not more than 5 parts by mass, more preferably not more than 3 parts by mass, and for example, not less than 0.01 parts by mass relative to 100 parts by mass of the hardening component.
由在後述塗佈步驟中之塗敷性之觀點來看,活性能量線硬化型組成物之25℃下之黏度宜為3mPa・s以上,較宜為5mPa・s以上,更宜為10mPa・s以上,且宜為100mPa・s以下,較宜為50mPa・s以下,更宜為30mPa・s以下。組成物之黏度係以E型黏度計(錐板型黏度計)測定之測定值。From the viewpoint of coatability in the coating step described later, the viscosity of the active energy ray-curable composition at 25°C is preferably 3 mPa·s or higher, more preferably 5 mPa·s or higher, more preferably 10 mPa·s Above, and preferably below 100mPa·s, more preferably below 50mPa·s, more preferably below 30mPa·s. The viscosity of the composition is the measured value measured with an E-type viscometer (cone-plate viscometer).
積層光學薄膜X例如可依以下方式製造。The laminated optical film X can be produced, for example, as follows.
首先,於其中一光學薄膜(光學薄膜10或光學薄膜20)之單面(接合預定面)塗佈活性能量線硬化型組成物,而形成該組成物之塗膜(塗佈步驟)。在該塗佈步驟之前,光學薄膜之接合預定面亦可進行表面改質處理。表面改質處理可舉電暈處理、電漿處理、準分子處理及火焰處理。本步驟中之塗佈方法可舉例如反向塗佈機、凹版塗佈機、棒式反向塗佈機、輥塗機、模塗機、棒塗機及桿塗機。First, an active energy ray-curable composition is coated on one side (surface to be joined) of one of the optical films (
接著,對其中一光學薄膜隔著組成物塗膜貼合另一光學薄膜(光學薄膜20或光學薄膜10)。貼合可使用例如輥壓層合機。Next, the other optical film (
接著,對光學薄膜10、20間之組成物塗膜照射活性能量線,使該塗膜(活性能量線硬化型組成物)硬化而形成接著劑層30(接著劑層30並非壓敏接著劑層)。藉此,光學薄膜10、20間係透過接著劑層30接合,而獲得積層光學薄膜X之原材薄膜。由抑制作為機能性光學薄膜之光學薄膜10劣化之觀點來看,在本步驟中宜從光學薄膜30側照射活性能量線。活性能量線可使用電子束、紫外線及可見光線。電子束照射機構可舉例如電子束加速器。紫外線及可見光線之光源可列舉例如:LED LIGHT、充有鎵之金屬鹵素燈、低壓水銀燈、中壓水銀燈、高壓水銀燈、超高壓水銀燈、氙燈、鹵素燈及鎵燈。在本步驟中,亦可視需求使用波長截止濾波器,以截止從光源射出之紫外線及/或可見光線之一部分的波長區域。Next, the composition coating film between the
接著,將原材薄膜之周端部的至少一部分進行外形加工(外形加工步驟)。例如,將捲狀原材薄膜之長邊方向一端部進行修整。例如,將捲狀原材薄膜切斷加工成單片狀。該等外形加工之方法可舉例如利用CO
2雷射照射等進行之雷射加工、利用沖裁刀進行之切斷及端銑刀加工。原材薄膜之外形加工處會於光學薄膜10、20發生較大之熱收縮而形成延長端部30a。具體而言,光學薄膜10、20之端部會收縮成在原材薄膜之端部光學薄膜10、20之端緣11、21從接著劑層30之端緣31往面方向內側後退,而形成延長端部30a。光學薄膜10、20之端部收縮的長度、亦即延長端部30a的延長長度L1、L2可藉由調整光學薄膜10、20之材料(尺寸收縮率)及厚度、以及加工條件來調整。加工條件可舉例如調整延伸倍率。
Next, at least a part of the peripheral end portion of the original film is subjected to contour processing (contour processing step). For example, one end in the longitudinal direction of a roll-shaped original film is trimmed. For example, a roll-shaped raw film is cut and processed into individual sheets. Such shape processing methods include, for example, laser processing by CO 2 laser irradiation, cutting by a punching knife, and end mill processing. The
例如依以上方式可製造積層光學薄膜X。For example, the laminated optical film X can be produced in the above manner.
實施例 以下顯示實施例來具體說明本發明。本發明不受實施例所限。又,以下記載之摻混量(含量)、物性值、參數等具體數值,可替代成上述「用以實施發明之形態」中記載之與其等對應之摻混量(含量)、物性值、參數等之上限(「以下」或「小於」所定義之數值)或下限(「以上」或「大於」所定義之數值)。 Example Examples are shown below to specifically illustrate the present invention. The present invention is not limited by the Examples. In addition, specific values such as the blending amount (content), physical property values, and parameters described below can be replaced by the corresponding blending amount (content), physical property values, and parameters described in the above "Forms for Implementing the Invention" The upper limit (the value defined as "below" or "less than") or the lower limit (the value defined as "above" or "greater than").
[實施例1] 將下述成分在25℃下混合1小時,調製出接著劑組成物(調製步驟)。 [Example 1] The following components were mixed at 25°C for 1 hour to prepare an adhesive composition (preparation step).
45質量份之3-苯氧基苄基丙烯酸酯(品名「LIGHT ACRYLATE POB-A」,單體,共榮社化學公司製) 25質量份之苯氧基二乙二醇丙烯酸酯(品名「LIGHT ACRYLATE P2H-A」,單體,共榮社化學公司製) 15質量份之三丙二醇二丙烯酸酯(品名「ARONIX M-220」,單體,東亞合成公司製) 10質量份之2-羥-3-苯氧丙基丙烯酸酯(品名「ARONIX M-5700」,單體,東亞合成公司製) 5質量份之羥乙基丙烯醯胺(品名「HEAA」,單體,KJ Chemicals Corporation製) 5質量份之二乙基丙烯醯胺(品名「DEAA」,單體,KJ Chemicals Corporation製) 3質量份之2-甲-1-(4-甲硫基苯基)-2-嗎福林基丙-1-酮(品名「OMINIRAD907」,光聚合引發劑,IGM Resins公司製) 3質量份之2,4-二乙基9-氧硫(品名「KAYACURE DETX-S」,光聚合引發劑,日本化藥公司製) 5質量份之丙烯酸寡聚物(品名「ARUFON 1190」,黏度6000mPa・s(25℃),Mw1700,Tg-50℃,東亞合成公司製) 0.5質量份之具有丙烯醯基之改質聚二甲基矽氧烷(品名「BYK-UV3505」,調平劑,BYK公司製) 45 parts by mass of 3-phenoxybenzyl acrylate (product name "LIGHT ACRYLATE POB-A", monomer, manufactured by Kyoeisha Chemical Co., Ltd.) 25 parts by mass of phenoxydiethylene glycol acrylate (product name "LIGHT ACRYLATE POB-A", ACRYLATE P2H-A", monomer, manufactured by Kyoeisha Chemical Co., Ltd.) 15 parts by mass of tripropylene glycol diacrylate (product name "ARONIX M-220", monomer, manufactured by Toagosei Co., Ltd.) 10 parts by mass of 2-hydroxy- 3-phenoxypropyl acrylate (product name "ARONIX M-5700", monomer, manufactured by Toagosei Co., Ltd.) 5 parts by mass of hydroxyethylacrylamide (product name "HEAA", monomer, manufactured by KJ Chemicals Corporation) 5 Parts by mass of diethylacrylamide (product name "DEAA", monomer, manufactured by KJ Chemicals Corporation) 3 parts by mass of 2-methyl-1-(4-methylthiophenyl)-2-morpholinopropane -1-ketone (product name "OMINIRAD907", photopolymerization initiator, manufactured by IGM Resins Co., Ltd.) 3 parts by mass of 2,4-diethyl 9-oxysulfide (product name "KAYACURE DETX-S", photopolymerization initiator, manufactured by Nippon Kayaku Co., Ltd.) 5 parts by mass of acrylic acid oligomer (product name "ARUFON 1190", viscosity 6000mPa·s (25°C), Mw1700, Tg-50°C , Toagosei Co., Ltd.) 0.5 parts by mass of modified polydimethylsiloxane with acryl group (product name "BYK-UV3505", leveling agent, BYK Co., Ltd.)
接著,於作為透明保護薄膜之厚度23µm之COP薄膜(品名「ZeonorFilm ZF14」,日本ZEON公司製)上塗敷接著劑組成物,而形成厚度1µm之接著劑塗膜。塗敷係使用MCD塗佈機(富士機械公司製)(凹槽形狀:蜂巢狀,凹版輥筒線數1000條/inch,旋轉速度140%/對線速)。接著,對透明保護薄膜透過該薄膜上之接著劑塗膜貼合偏光件薄膜。接著,藉由從透明保護薄膜側對接著劑塗膜照射紫外線,使薄膜間之接著劑塗膜硬化。紫外線照射中,係使用具備充有鎵之金屬鹵素燈的紫外線照射裝置(品名「Light HAMMER10」,燈泡:V燈泡,Fusion UV Systems, Inc公司製)作為光源。紫外線照射中,峰值照度為1600mW/cm 2,累積照射量設為1000mJ/cm 2(波長380~440nm)(照度係使用Solatell公司製之「Sola-Check系統」來測定)。藉此,接合透明導電性薄膜與偏光件薄膜而獲得積層光學薄膜。 Next, the adhesive composition was coated on a 23 µm thick COP film (product name "Zeonor Film ZF14", manufactured by ZEON Corporation, Japan) as a transparent protective film to form an adhesive coating film with a thickness of 1 µm. The coating system used an MCD coater (manufactured by Fuji Machinery Co., Ltd.) (groove shape: honeycomb shape, gravure roll line number 1000 lines/inch, rotation speed 140%/line speed). Next, the polarizer film is bonded to the transparent protective film through the adhesive coating film on the film. Next, by irradiating the adhesive coating film with ultraviolet light from the side of the transparent protective film, the adhesive coating film between the films is cured. In the ultraviolet irradiation, an ultraviolet irradiation apparatus (product name "Light HAMMER10", bulb: V bulb, manufactured by Fusion UV Systems, Inc.) equipped with a gallium-filled metal halide lamp was used as a light source. In ultraviolet irradiation, the peak illuminance was 1600mW/cm 2 , and the cumulative irradiance was 1000mJ/cm 2 (wavelength 380-440nm) (the illuminance was measured using the "Sola-Check system" manufactured by Solatell). Thereby, a laminated optical film is obtained by bonding the transparent conductive film and the polarizer film.
接著,將積層光學薄膜進行外形加工(外形加工步驟)。具體而言,係藉由照射CO 2雷射將積層光學薄膜沿厚度方向切削,而獲得預定之俯視形狀的積層光學薄膜。CO 2雷射照射中,波長設為9.4µm,輸出設為48W,掃描速度設為500mm/秒。接著,將積層光學薄膜放置於室溫下24小時。 Next, the laminated optical film is subjected to contour processing (contour processing step). Specifically, the laminated optical film is cut in the thickness direction by irradiating CO 2 laser to obtain a predetermined plan view shape of the laminated optical film. In CO2 laser irradiation, the wavelength was set to 9.4 µm, the output was set to 48 W, and the scanning speed was set to 500 mm/sec. Next, the laminated optical film was left at room temperature for 24 hours.
依以上方式,製作出實施例1之積層光學薄膜。實施例1之積層光學薄膜係於厚度方向上依序具備偏光件薄膜(厚度5µm)、接著劑層及透明保護薄膜(厚度23µm)。In the above manner, the laminated optical film of Example 1 was produced. The laminated optical film of Example 1 is sequentially provided with a polarizer film (5 µm in thickness), an adhesive layer, and a transparent protective film (23 µm in thickness) in the thickness direction.
[實施例2] 除了以下事項外,依與實施例1之積層光學薄膜相同方式而製作出實施例2之積層光學薄膜(偏光件薄膜/接著劑層/透明保護薄膜)。調製步驟中,將「ARONIX M-220」之摻混量設為5質量份來取代15質量份,且將形成於透明保護薄膜上之接著劑層塗膜之厚度設為1µm。 [Example 2] Except for the following matters, the laminated optical film of Example 2 (polarizer film/adhesive layer/transparent protective film) was produced in the same manner as the laminated optical film of Example 1. In the preparation step, the blending amount of "ARONIX M-220" was set to 5 parts by mass instead of 15 parts by mass, and the thickness of the adhesive layer coating formed on the transparent protective film was set to 1 µm.
[實施例3] 除了以下事項外,依與實施例1之積層光學薄膜相同方式而製作出實施例3之積層光學薄膜(偏光件薄膜/第2接著劑層/透明保護薄膜)。 [Example 3] The laminated optical film of Example 3 (polarizer film/second adhesive layer/transparent protective film) was produced in the same manner as the laminated optical film of Example 1 except for the following matters.
調製步驟中,將「LIGHT ACRYLATE POB-A」之摻混量設為43質量份,將「LIGHT ACRYLATE P2H-A」之摻混量設為29質量份,且將「ARONIX M-220」之摻混量設為3質量份。塗佈步驟中,將要形成於透明保護薄膜上之接著劑層塗膜之厚度設為1µm。In the preparation step, set the blending amount of "LIGHT ACRYLATE POB-A" to 43 parts by mass, the blending amount of "LIGHT ACRYLATE P2H-A" to 29 parts by mass, and the blending amount of "ARONIX M-220" The mixing amount was set to 3 parts by mass. In the coating step, the thickness of the coating film of the adhesive layer to be formed on the transparent protective film was set to 1 µm.
[比較例1] 除了以下事項外,依與實施例1之積層光學薄膜相同方式而製作出比較例1之積層光學薄膜(偏光件薄膜/接著劑層/透明保護薄膜)。 [Comparative example 1] The laminated optical film of Comparative Example 1 (polarizer film/adhesive layer/transparent protective film) was produced in the same manner as the laminated optical film of Example 1 except for the following matters.
調製步驟中,使用共榮社化學公司製之「LIGHT ACRYLATE 1.9ND-A」(1,9-壬二醇二丙烯酸酯)36質量份與共榮社化學公司製之「LIGHT ACRYLATE HPP-A」(羥基三甲基乙酸新戊二醇丙烯酸酯加成物)12.5質量份,來取代「LIGHT ACRYLATE POB-A」與「LIGHT ACRYLATE P2H-A」,且不使用「ARONIX M-220」,並將「ARONIX M-5700」之摻混量設為22質量份,將「HEAA」之摻混量設為12.5質量份,將「DEAA」之摻混量設為6質量份,將「HEAA」之摻混量設為12.5質量份,且將「ARUFON 1190」之摻混量設為10質量份。In the preparation step, 36 parts by mass of "LIGHT ACRYLATE 1.9ND-A" (1,9-nonanediol diacrylate) manufactured by Kyoeisha Chemical Co., Ltd. and "LIGHT ACRYLATE HPP-A" manufactured by Kyoeisha Chemical Co., Ltd. were used (Hydroxytrimethylacetic acid neopentyl glycol acrylate adduct) 12.5 parts by mass to replace "LIGHT ACRYLATE POB-A" and "LIGHT ACRYLATE P2H-A", and do not use "ARONIX M-220", and put The blending amount of "ARONIX M-5700" was 22 parts by mass, the blending amount of "HEAA" was 12.5 parts by mass, the blending amount of "DEAA" was 6 parts by mass, and the blending amount of "HEAA" The blending amount was set to 12.5 parts by mass, and the blending amount of "ARUFON 1190" was set to 10 parts by mass.
<端部之觀察> 針對實施例1~3及比較例1之各積層光學薄膜調查端部之縱截面形狀。首先,沿厚度方向切斷從積層光學薄膜之周端部任意選擇之處,而形成觀察用之縱截面。接著,藉由光學顯微鏡觀察及拍攝該縱截面。然後,於各觀察截面中,確認接著劑層於薄膜面方向上具有較偏光件薄膜之端緣(第1端緣)及透明保護薄膜之端緣(第2端緣)更向外延長之部分(延長端部)。又,於各觀察截面測定了延長端部在面方向上自第1端緣起算之延長長度L1與延長端部在面方向上自第2端緣起算之延長長度L2。將其結果顯示於表1。 <Observation at the end> The vertical cross-sectional shape of the edge part was investigated about each laminated optical film of Examples 1-3 and Comparative Example 1. First, a longitudinal section for observation is formed by cutting at an arbitrarily selected portion from the peripheral end of the laminated optical film in the thickness direction. Next, the longitudinal section was observed and photographed with an optical microscope. Then, in each observed cross-section, it was confirmed that the adhesive layer had a portion extending outward from the edge (first edge) of the polarizer film and the edge (second edge) of the transparent protective film in the direction of the film surface. (extended end). Also, the extension length L1 of the extension end portion from the first edge in the plane direction and the extension length L2 of the extension end portion from the second end edge in the plane direction were measured in each observed section. The results are shown in Table 1.
又,關於積層光學薄膜之損傷的抑制,按以下基準進行評估:將上述觀察截面中於偏光件薄膜及透明保護薄膜兩者無發生損傷(裂痕及缺口等)之情況評估為"佳",且將於偏光件薄膜及透明保護薄膜中之至少一者有發生損傷之情況評估為"不良”。將其結果顯示於表1。In addition, the suppression of damage to the laminated optical film was evaluated on the following basis: the situation where no damage (cracks, cracks, etc.) occurred on both the polarizer film and the transparent protective film in the above-mentioned observation section was evaluated as "good", and The case where at least one of the polarizer film and the transparent protective film was damaged was evaluated as "defective". The results are shown in Table 1.
<壓痕彈性模數> 藉由奈米壓痕法測定實施例1~3及比較例1之各積層光學薄膜中之接著劑層之壓痕彈性模數(測定第1彈性模數)。具體而言,首先從積層光學薄膜裁切出5mm×10mm尺寸之薄膜片(積層光學薄膜)。接著,利用凍結切片法切削積層光學薄膜。具體而言,係在將積層光學薄膜冷卻至-30℃後,以硬質切刀沿該薄膜之厚度方向上削,然後恢復至室溫。藉此,獲得測定用試料。接著,使用奈米壓痕試驗機(品名「TI950 Triboindenter」,Hysitron公司製),依循JIS Z 2255:2003對測定試料中之接著劑層之露出表面實施荷重-位移測定,而獲得荷重-位移曲線。本測定中,測定模式設為單一壓入測定,測定溫度設為25℃,使用壓頭係採用Berkovich(三角錐)型鑽石壓頭,荷重施加過程中壓頭對測定試料之最大壓痕深度(最大位移hmax)設為50nm,該壓頭之壓入速度設為10nm/秒,卸重過程中壓頭從測定試料拉出之拉出速度設為10nm/秒。然後,利用「TI950 Triboindenter」之專用解析軟體(Ver. 9.4.0.1)處理所得之測定數據。具體而言,依據所得之荷重(f)-位移(h)曲線獲得了:最大荷重fmax(以最大位移hmax作用於壓頭之荷重)、接觸投影面積S(在最大荷重時壓頭與試料之間的接觸區域的投影面積)、及在卸重開始時荷重-位移曲線之切線的斜率D。然後,從斜率D與接觸投影面積S算出接著劑層之壓痕彈性模數(=(π 1/2D)/(2S 1/2))。將該值作為壓痕彈性模數E1(GPa)顯示於表1。 <Indentation modulus of elasticity> The indentation modulus of elasticity of the adhesive layer in each laminated optical film of Examples 1 to 3 and Comparative Example 1 was measured by the nanoindentation method (measurement of the first modulus of elasticity). Specifically, first, a film sheet (laminated optical film) with a size of 5 mm×10 mm is cut out from the laminated optical film. Next, the laminated optical film was cut by the frozen section method. Specifically, after cooling the laminated optical film to -30°C, use a hard cutter to cut upward along the thickness direction of the film, and then return to room temperature. Thereby, a sample for measurement is obtained. Next, use a nanoindentation tester (product name "TI950 Triboindenter", manufactured by Hysitron Corporation) to perform a load-displacement measurement on the exposed surface of the adhesive layer in the test sample in accordance with JIS Z 2255:2003, and obtain a load-displacement curve . In this measurement, the measurement mode is set to single indentation measurement, the measurement temperature is set to 25°C, the indenter used is a Berkovich (triangular pyramid) diamond indenter, and the maximum indentation depth of the indenter on the test sample during the load application process ( The maximum displacement hmax) is set to 50nm, the indenter's indentation speed is set to 10nm/sec, and the indenter's pull-out speed from the test sample is set to 10nm/sec during the unloading process. Then, use the dedicated analysis software (Ver. 9.4.0.1) of "TI950 Triboindenter" to process the obtained measurement data. Specifically, according to the load (f)-displacement (h) curve obtained: the maximum load fmax (the load acting on the indenter with the maximum displacement hmax), the contact projected area S (the distance between the indenter and the sample at the maximum load) The projected area of the contact area between them), and the slope D of the tangent to the load-displacement curve at the beginning of unloading. Then, the indentation elastic modulus (=(π 1/2 D)/(2S 1/2 )) of the adhesive layer was calculated from the slope D and the contact projected area S. This value is shown in Table 1 as the indentation elastic modulus E1 (GPa).
又,除了將實施例1~3及比較例1之各積層光學薄膜中之接著劑層之80℃下之壓痕彈性模數的測定溫度設為80℃來取代25℃外,依與第1彈性模數測定相同方式進行測定(測定第2彈性模數)。將該值作為壓痕彈性模數E2(GPa)顯示於表1。又,將80℃下之壓痕彈性模數E2相對於25℃下之壓痕彈性模數E1的比率(E2/E1)亦顯示於表1。In addition, except that the measurement temperature of the indentation elastic modulus at 80°C of the adhesive layer in each of the laminated optical films of Examples 1 to 3 and Comparative Example 1 was set to 80°C instead of 25°C, the same method as in the first Elastic modulus measurement was performed in the same manner (measurement of the second elastic modulus). This value is shown in Table 1 as the indentation elastic modulus E2 (GPa). Table 1 also shows the ratio (E2/E1) of the indentation modulus E2 at 80°C to the indentation modulus E1 at 25°C.
[表1] [Table 1]
X:積層光學薄膜
10:光學薄膜(第1光學薄膜)
11:光學薄膜10之端緣(第1端緣)
20:光學薄膜(第2光學薄膜)
21:光學薄膜20之端緣(第2端緣)
30:接著劑層
30a:延長端部
31:接著劑層之端緣
L1,L2:延長長度
H:厚度方向
M:外部構件
X:Laminated optical film
10: Optical film (1st optical film)
11: The edge of the optical film 10 (the first edge)
20: Optical film (2nd optical film)
21: the edge of the optical film 20 (the second edge)
30:
圖1係本發明積層光學薄膜之一實施形態的截面示意圖。 圖2係圖1所示之積層光學薄膜之端部的部分放大截面圖。 圖3係顯示接著劑層之延長端部的一功能。 Fig. 1 is a schematic cross-sectional view of an embodiment of the laminated optical film of the present invention. FIG. 2 is a partially enlarged cross-sectional view of an end portion of the laminated optical film shown in FIG. 1. FIG. Figure 3 shows a function of the extended end of the adhesive layer.
10:光學薄膜(第1光學薄膜) 10: Optical film (1st optical film)
11:光學薄膜10之端緣(第1端緣) 11: The edge of the optical film 10 (the first edge)
20:光學薄膜(第2光學薄膜) 20: Optical film (2nd optical film)
21:光學薄膜20之端緣(第2端緣) 21: the edge of the optical film 20 (the second edge)
30:接著劑層 30: Adhesive layer
30a:延長端部 30a: Extended end
31:接著劑層之端緣 31: The edge of the adhesive layer
L1,L2:延長長度 L1, L2: extended length
H:厚度方向 H: Thickness direction
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