201026481 六、發明說明: 【發明所屬之技術領域】 本發明係關於結晶性樹脂板的製造方法。 【先前技術】 近年’對於使用在構成直下式液晶顯示器之背 的光擴散板亦開始要求較高之平面性。至今,作爲 φ 板者’採用了聚甲基丙烯酸甲酯(PMMA)樹脂、 烯酸甲酯—苯乙烯共聚合(MS)樹脂、聚苯乙烯 樹脂、聚碳酸酯(PC〉樹脂等,此等全部爲非晶性 另一方面’由以丙烯樹脂爲起始之結晶性樹脂所構 擴散板’以其重量輕、機械性強度較大不易損壞、 易受吸濕或來自光源的熱之影響而變形的特徵而周 如’日本特開2008-083660號公報(專利文獻1 )) 但是,丙烯樹脂等之結晶性樹脂,在藉由擠壓 ® 法而成形之時,在從熔融狀態到冷卻成形的段階, 伴隨結晶化而引起之發熱,故難以控制薄片之彎翹 是’作爲使用於液晶顯示器用背光裝置的光擴散板 於須要求較高之平面性,故在擠壓成形時一面要控 一面要製造由爲其結晶性樹脂之丙烯樹脂等所構成 散板,在技術上是很困難的。 作爲防止如此彎翹之方法,以往,採用了於擠 時在通過壓延輥筒後,使以平坦狀態通過搬運輥筒 方法(例如,參照第5圖),但在平行於搬運方向 光裝置 光擴散 甲基丙 (PS ) 樹脂。 成之光 具有不 知(例 〇 成形方 由於會 。特別 者,由 制彎翹 的光擴 壓成形 之上的 (亦稱 -5- 201026481 MD方向)之斷面上僅發生凹翹,而未發生MD方向之凸 翹。因此難以抑制或控制彎翹。對於如此之MD方向的凹 翹,爲了影響製得之薄片的彎翹,而檢討了包含MD方向 之凹翹的薄片之各種用以抑制或是消除彎翹發生的方法。 例如,於日本特開2002-1 20248號公報(專利文獻2 ),揭示有如第6圖所示般把通過押壓輥筒3、4、5的樹 脂薄片2用發熱器8、9加熱,其後藉由以往之方法搬運 ,來減低如起波浪般之歪斜的方法。又’於曰本特開 2002-1 20249號公報(專利文獻3),揭示有如第7圖所 示般,爲了調整彎翹量,而設置之彎翹賦予輥筒把通 過該彎翹賦予輥筒10時之樹脂薄片2,藉由予以加熱或冷 卻,控制搬運時之樹脂薄片2之上下面的溫度差之方法。 於日本特開2005-088310號公報(專利文獻4),揭示有 如第8圖所示般,配置特定之彎翹賦予輥筒20,來抑制彎 翹之發生或是調整彎翹之方法。 【發明內容】 〔發明所欲解決之技術問題〕 然而,於以往之方法,用以抑制彎翹的裝置構成很複 雜,且,擠壓薄片之搬運方向的彎翹之抑制或調整不夠充 分,而有所謂搬運方向之凹翹殘留的問題。本發明,其目 的爲消除包含如此凹翹之薄片的彎翹,藉由簡易的方法提 供一種平坦性優異之結晶性樹脂板的製造方法。 201026481 〔解決問題之技術手段〕 亦即本發明’係關於包含有:從模座將結晶性樹脂擠 壓成薄片狀的製程、及使所擠壓出之薄片狀的上述結晶性 樹脂通過壓延輥筒而形成擠壓薄片的製程,以及使擠壓薄 片之薄片面的寬幅方向以成爲水平之方式搬運擠壓薄片的 製程之結晶性樹脂板的製造方法,其特徵爲··搬運的製程 ,係使上述擠壓薄片接觸於沿著上述擠壓薄片之搬運方向 φ 所配置的至少4根搬運輥筒來進行,且包含加上:使擠壓 薄片之上表面沿著搬運方向接觸於搬運輥筒之後再使擠壓 薄片之下表面沿著搬運方向接觸於搬運輥筒的製程,以及 在使擠壓薄片之下表面沿著搬運方向接觸於搬運輥筒之後 再使擠壓薄片之上表面沿著搬運方向接觸於搬運輥筒的製 程之至少1個,合計2個製程以上之結晶性樹脂板的製造 方法。 上述搬運的製程,爲使擠壓薄片接觸於沿著擠壓薄片 φ 的搬運方向配置之至少4根搬運輥筒來進行,且,該接觸 ,以使擠壓薄片之上表面或下表面之任一方沿著搬運方向 交互接觸於各搬運輥筒較爲理想。 上述搬運的製程,係在以結晶性樹脂之結晶化溫度爲 Tc ( °C ),以連續配置之4根上述搬運輥筒之中’沿著搬 運方向在接觸於第一個搬運輥筒時之沒有與搬運輥筒接觸 之側的薄片表面之溫度爲Twarp ( °C )時’在Twarp滿足下 式(1 )之條件下進行。201026481 VI. Description of the Invention: [Technical Field of the Invention] The present invention relates to a method for producing a crystalline resin sheet. [Prior Art] In recent years, high planarity has been demanded for the use of a light diffusing plate which is formed on the back of a direct type liquid crystal display. Up to now, as a φ plate, a polymethyl methacrylate (PMMA) resin, a methyl olefin-styrene copolymerization (MS) resin, a polystyrene resin, a polycarbonate (PC> resin, etc. have been used. All of them are amorphous. On the other hand, 'the diffusing plate made of a crystalline resin starting from a propylene resin' is light in weight, mechanically strong, not easily damaged, susceptible to moisture absorption or heat from a light source. In the case of the crystalline resin such as acryl resin, when it is formed by the extrusion method, it is formed from a molten state to a cooling shape. The step is caused by the crystallization, so it is difficult to control the bending of the sheet. As a light diffusing plate used for a backlight for a liquid crystal display, it is required to have a high planarity, so that it is controlled at the time of extrusion molding. It is technically difficult to manufacture a dispersion sheet composed of an acrylic resin or the like which is a crystalline resin. As a method of preventing such warping, conventionally, a method of transporting a roll in a flat state after passing through a calender roll is performed (for example, refer to FIG. 5), but light diffusion is performed in parallel with the conveyance direction. Methyl propyl (PS) resin. Cheng Zhiguang has no idea (for example, the forming side is due to the meeting. In particular, the warping on the bend-formed light-expanding shape (also known as -5 - 201026481 MD direction) only occurs on the section, but does not occur. It is difficult to suppress or control the warp in the direction of the MD. For such a warp direction in the MD direction, in order to influence the bending of the obtained sheet, various kinds of sheets including the concave direction of the MD direction are examined for suppression or For example, Japanese Laid-Open Patent Publication No. 2002-1 20248 (Patent Document 2) discloses a resin sheet 2 that passes through the pressing rolls 3, 4, and 5 as shown in Fig. 6. The heaters 8 and 9 are heated, and then transported by a conventional method to reduce the skewness as a wave. Further, as disclosed in Japanese Patent Laid-Open Publication No. 2002-1 20249 (Patent Document 3), As shown in the figure, in order to adjust the amount of warpage, the resin sheet 2 which is provided to the roller by the bending imparting roller 10 is heated or cooled to control the resin sheet 2 during transportation. The following method of temperature difference. Special opening in Japan 2005-0883 Japanese Patent Publication No. 10 (Patent Document 4) discloses a method of arranging a specific bending imparting roller 20 to suppress the occurrence of warping or adjusting the bending as shown in Fig. 8. [Invention] Technical Problem to be Solved However, in the conventional method, the device for suppressing bending is complicated, and the suppression or adjustment of the bending of the direction in which the extruded sheet is conveyed is insufficient, and there is a so-called conveyance direction. The present invention has an object of the present invention to provide a method for producing a crystalline resin sheet having excellent flatness by a simple method, in order to eliminate the warpage of a sheet containing such a curl. 201026481 [Technical means for solving the problem] The invention includes a process of extruding a crystalline resin into a sheet shape from a die holder, and a process of forming the extruded sheet by pressing the roll of the above-mentioned crystalline resin through a calender roll, and A method for producing a crystalline resin sheet in which a wide range of a sheet surface of an extruded sheet is conveyed so as to be horizontally conveyed, and is characterized by a process of transporting, And the pressing sheet is brought into contact with at least four conveying rollers disposed along the conveying direction φ of the pressing sheet, and includes: adding the upper surface of the pressing sheet to the conveying roller along the conveying direction After the cylinder, the lower surface of the pressing sheet is brought into contact with the conveying roller in the conveying direction, and the upper surface of the pressing sheet is brought along the lower surface of the pressing sheet in contact with the conveying roller in the conveying direction. At least one of the processes in which the conveyance direction is in contact with the conveyance roller, and the method of manufacturing the two or more processes of the crystalline resin sheet is carried out. The process of the conveyance is to bring the extruded sheet into contact with the conveyance direction along the extruded sheet φ. At least four transport rollers are disposed, and the contact is preferably such that one of the upper surface or the lower surface of the extruded sheet is alternately contacted with each of the transport rollers in the transport direction. In the above-described conveyance process, the crystallization temperature of the crystalline resin is Tc (°C), and the four transport rollers that are continuously disposed are in contact with the first conveyance roller in the conveyance direction. When the temperature of the surface of the sheet which is not in contact with the conveying roller is Twarp (°C), it is carried out under the condition that Twarp satisfies the following formula (1).
Tc- 30^ Twarp^ Tc+ 20 …(1)。 201026481 又本發明之製造方法,在上述結晶性樹脂爲丙烯樹脂 之場合較爲適合。 根據本發明,可用簡易的方法抑制或控制搬運方向之 凹翹,並縮小薄片整體之彎翹,且比起藉由以往之方法得 到的薄片(樹脂板),可抑制薄片之起伏發生,提供一種 平坦性優異的樹脂板。又,根據本發明之方法,比起以往 之方法,因能在較短之搬運距離內冷卻薄片,故於搬運距 離有限之小空間內也可生產。 【實施方式】 以下,關於本發明予以更詳細之說明。又,於以下實 施形態之說明,使用圖面說明,不過於本申請案之圖面附 以同一參照符號者,係顯示同一部分或是相當部分。 <結晶性樹脂板的製造方法> 本發明之結晶性樹脂板的製造方法,係包含:從模座 0 將結晶性樹脂擠壓成薄片狀的製程、及使所擠壓出之薄片 狀的結晶性樹脂通過壓延輥筒而形成擠壓薄片的製程,以 及使擠壓薄片之薄片面的寬幅方向以成爲水平之方式搬運 擠壓薄片的製程。 於本發明所謂結晶性樹脂(於以下有時單稱爲樹脂) ’如於化學辭典(東京化學同人)等所定義般,意指固體 狀態且帶有結晶性質之高分子化合物,且於X光繞射光譜 顯示結晶性繞射峰之樹脂(高分子)。於結晶性樹脂,在 - 8 - 201026481 藉由擠壓成形製造平面性優異的樹脂板之時,如上述般包 含搬運方向之凹翹的薄片整體之彎翹的發生會成爲問題❶ 本發明,可有效抑制或是排除將如此之結晶性樹脂擠壓成 形作成樹脂板時之彎翹。 上述結晶性樹脂,可爲由單一之單元體所構成者,亦 可使用由含有2種以上之單元體的共聚合體所構成者。例 如’於結晶性樹脂可舉含有7 5質量%以上之丙烯單體單元 φ 的丙烯聚合體或是丙烯共聚合體之例,具體上,以由丙烯 單體單元含有量爲75〜100質量%,乙烯單體單元含有量 爲0〜15質量%且含有0〜25質量%之1- 丁烯單體單元的 丙稀聚合體或是丙懦共聚合體所構成較理想。較佳爲,由 丙烯單體單元爲95質量%以上,乙烯單體單元爲〇〜5質 量%且含有〇〜5質量%之1- 丁烯單體單元的丙烯聚合體 所構成之場合’又更佳爲由丙烯單體單元爲99質量%以上 ,乙烯單體單元爲〇〜1質量%且含有0〜1質量%之丨—丁 Φ 烯單體單元的丙烯聚合體所構成之場合。又,丙烯單體單 元含有量亦可爲100質量%。又,本發明之製造方法對於 結晶性樹脂特別有用,不過在使用熱可塑性樹脂或是熱硬 化性樹脂之時亦可抑制薄片整體之彎翹。 又’於上述樹脂,亦可添加成核劑、光擴散劑、紫外 線吸收劑、熱穩定劑、加工安定劑、靜電防止劑等之添加 劑。此等添加劑之調配量只要於本發明奏效之範圍內調整 使用即可’沒有特別限定。又,其他,關於結晶性樹脂以 外之非晶性樹脂’只要沒有損害本發明之效果的程度亦可 -9 _ 201026481 混合。特別是,構成擠壓薄片之樹脂爲丙烯系樹脂時,若 混合壓克力系樹脂時,根據此等樹脂的折射率大致同等, 得知沒有損害製得的樹脂板之透明度,且使剛性等之機械 特性提昇之方法,很是有用。 上述光擴散劑,可爲無機系光擴散劑,亦可爲有機系 光擴散劑。作爲無機系光擴散劑者,例如可舉像碳酸鈣、 硫酸鋇、氧化鈦、氫氧化鋁、二氧化矽、無機玻璃、滑石 、雲母、白碳、氧化鎂、氧化鋅等般之無機化合物之粒子 @ 。無機系光擴散劑,亦可藉由脂肪酸等之表面處理劑來處 理表面。又,作爲有機系光擴散劑者,例如可舉像苯乙烯 系聚合體粒子、壓克力系聚合體粒子、矽氧烷系聚合體粒 子等般之有機化合物之粒子。 添加光擴散劑時,所添加之光擴散劑的折射率與樹脂 的折射率之差的絕對値,由光擴散的效果之點來看,一般 爲0.02以上,且由製得之結晶性樹脂板的光透過性之點 來看,一般爲0.25以下。如此於樹脂添加光擴散劑時, @ 製得之結晶性樹脂板,可作爲光擴散板使用。光擴散劑之 添加量沒有特別限定,只要適當調整即可。 於上述結晶性樹脂中含有成核劑時,由於促進了結晶 化,可使薄片之製造效率提昇。作爲成核劑者可使用有機 磷酸鹽系成核劑等之習知者,例如相對於結晶性樹脂100 質量份,只要0.03〜1.0質量份之含有量即可,但並非限 於該範圍者。 將結晶性樹脂擠壓成薄片狀之製程係使用模座進行。 -10- 201026481 作爲如此之模座者,可使用以往習知之採用於擠壓成形的 金屬製之T字模等。樹脂爲在加熱熔融狀態下從上述模座 被連續性擠壓出,於該擠壓可使用與一般之擠壓成形法同 樣的擠壓機。擠壓機可爲一軸擠壓機,亦可爲二軸擠壓機 。上述結晶性樹脂係在擠壓機內被加熱、熔融的狀態下送 往模座並擠壓。從模座被擠壓出的樹脂,成爲連續性薄片 狀被擠壓出。薄片之形狀沒有特別限定,根據製得的樹脂 Φ 板之用途調整該厚度及寬幅。又,擠壓薄片可爲單層構造 ,亦可作成2層以上之積層構造。此等構成,只要根據如 上述般製得的樹脂板之用途,適當變更即可。例如,作爲 光擴散板使用時一般只要將合計厚度作成 0.1mm以上 3.0mm以下,較佳爲〇.5mm以上3.0mm以下,更佳爲 0.8mm以上3.0mm以下即可。 被擠壓成上述薄片狀的結晶性樹脂,接著被供給於使 其通過壓延輥筒形成擠壓薄片的製程。於第1圖顯示有採 〇 用於本發明之結晶性樹脂板的製造方法的裝置之槪略斷面 圖。從模座1被擠壓出的結晶性樹脂之薄片,被夾於其爲 壓延輥筒之第一押壓輥筒與第二押壓輥筒並成形爲所期望 之厚度的押壓薄片2。其爲壓延輥筒之第一押壓輥筒與第 二押壓輥筒,只要作爲採用於如此之樹脂板的製造之習知 的輥筒即可,且該直徑沒有特別限定。又,第一、第二及 第三押壓輥筒,可爲鏡面輥筒,亦可爲透鏡形狀、壓花形 狀、菱鏡形狀等之施有形狀處理之,所謂轉印用輥筒。此 等押壓輥筒的表面溫度沒有特別限定,不過一般先設在50 -11 - 201026481 °C〜1 5 0 °C較爲理想。在如此之溫度條件下壓延並成形爲 押壓薄片時’與本發明之後的結晶性樹脂板的製造方法之 製程組合’可使製得的結晶性樹脂板之平面性的提升效果 有更多改善。 上述轉印輥筒,爲於表面具備有轉印模型的輥筒。轉 印模型’係被押壓擋接於連續樹脂薄片的表面,而將該表 面形狀以反向模紋轉印於連續樹脂薄片者。轉印模型,例 如是由設置於轉印輥筒表面的複數個凹部或凸部所組成, 0 凹部或凸部之間距間隔,考量到轉印模型的製作容易度, —般爲l〇#m以上,較佳爲30/zm以上,更佳爲50ym 以上。又’該上限沒有特別限定,一般,爲50〇 # m以下 ,更佳爲250ym以下。 又’凹部之溝深度,或凸部之頂部高度,由轉印模型 的製作之點來考量,爲30/zm〜1500/zm,不過並非爲被 限定於該範圍者。 相對於轉印模型的凹部之間距間隔的溝深度之比率( @ 溝深度/間距間隔)’或是相對於凸部之間距間隔的頂部 高度之比率(頂部高度/間距間隔),在作爲樹脂而使用 結晶化溫度峰値的幅度爲9 t以下之結晶性高分子樹脂之 場合’使上述比率爲1以上,更甚者爲1.2以上,亦可進 行理想之轉印。相對於該轉印模型的凹部之間距間隔的溝 深度之比率(溝深度/間距間隔),或是相對於凸部之間 距間隔的頂部高度之比率(頂部高度/間距間隔),一般 爲5以下,更佳爲3以下。上述比率亦可未滿1。 -12- 201026481 第12圖係轉印模型表面之一例,爲斷面形狀呈V字 (三角形)之轉印模型的表面斷面圖。於第12圖,斷面 形狀之頂部及凹部或凸部之斷面形狀整體爲V字(三角形 )。如第12圖所示,於轉印模型設置有複數個凹部或是 凸部,所謂凹部或凸部之間距間隔(P〇意指鄰接之凹部 的溝部間之距離(第12圖中之P,’)或是鄰接之凸部的頂 部間之距離(第12圖中之P2’),所謂凹部的溝深度(H· )意指從轉印輥筒表面至凹部的最深部之垂直距離,所謂 凸部的頂部高度,意指從凸部底面至轉印輥筒表面之垂直 距離’於第12圖爲與凹部的溝深度(ΚΓ)相同。 斷面形狀之頂部爲V字(三角形)時,該三角形之頂 角Θ’可作成10°〜1〇〇°。頂角θ’亦可在1〇°〜90。之範圍內 。在作爲樹脂而使用結晶化溫度峰値的幅度爲9 °C以下之 結晶性高分子樹脂時,即使是使用三角形之頂角Θ·爲1〇。 〜60°之細微轉印模型之場合,亦可精度準確地進行轉印 ® ,製得的薄片之表面形狀爲與轉印模型大致相等者。 又,作爲上述轉印模型之形狀者,不限於第12圖所 示般之具備有V字斷面形狀者,可舉例如第13圖所示之 爲略半圓形狀的略半圓凹部(略半圓凹窪)之溝,或例如 具備有藉由爲第11圖所示之V字溝-曲面複合形狀的直 線11'所形成之V字(三角形)的頂角Θ’及曲面狀之邊 12'的凹部之溝。於第13圖,間距間隔(ρ')爲與第12圖 同樣,意指鄰接之凹部的溝部間之距離,所謂凹部的溝深 度(Η’)意指從轉印輥筒表面至凹部的最深部之垂直距離 -13- 201026481 。又,好似將略半圓凹部之溝倒轉的略半圓凸部亦包含於 轉印模型之形狀。將轉印模型作成略半圓凸部時,間距間 隔意指鄰接之凸部的頂部間之距離,所謂凸部之頂部高度 ,意指從凸部底面至轉印輥筒表面之垂直距離。上述略半 圓,如第13圖所示,並不限定於其斷面爲半圓弧狀之形 狀者,亦可爲例如像第14圖所示之柱透鏡般,把圓柱體 在平行於該軸線,且在不含該軸線的平面處裁切時的斷面 之任一弧狀之形狀,或亦可爲其斷面爲半橢圓弧狀,或爲 @ 該半橢圓弧狀之一部分的扁平彎曲狀等之形狀。上述「略 半圓凹部」或是「略半圓凸部」,爲含有如此之略半圓形 狀的斷面之凹部或是凸部者。 於第15圖,間距間隔(P )爲與第12圖同樣,意指 鄰接之凹部的溝部間之距離或是鄰接之凸部的頂部間之距 離,所謂凹部的溝深度(H’)意指從轉印輥筒表面至凹部 的最深部之垂直距離。又,凸部的頂部高度,意指從凸部 底面至轉印輥筒表面之垂直距離,爲與凹部的溝深度(H' Q )相同距離。上述V字溝一曲面複合形狀,例如第1 6圖 所示,只要其斷面具備有由直線11’所形成的V字(三角 形)之頂角Θ’及由曲面狀之邊12'所構成的斜面,則亦可 爲任一在不含包含有該曲面的圓柱體之軸線的平面處裁切 時之斷面的形狀。在此所謂之曲面,可爲圓弧狀之一部分 ,或橢圓弧狀之一部分,亦可爲由橢圓弧狀以外的曲線所 構成之形狀。上述「V字溝-曲面複合形狀凹部」,係包 含有如此之大致V字溝一曲面複合形狀的斷面之凹部者。 -14- 201026481 又,於凹部或凸部之形狀,如第15圖般不含直線部分, 如第17圖所示般包含有曲線13'所交叉形成的形狀之溝。 又,位於轉印模型之各凹部或各凸部,爲如第12圖 所示般連續設置,亦有如第13圖及第15圖所示般隔開任 意之間隔d且平行地設置之情形。此等凹部的間隔或是凸 部的間隔係根據製得的薄片之用途而加以選擇。又,於本 發明之位於上述轉印模型的間距間隔(PO及溝深度(H1 φ )或是頂部高度,在轉印模型整體上未必都一定,亦包含 有作成鄰接之凹部間或是凸部間部分相異之形狀的情形者 。又,具備有上述V字凹溝所倒轉之V字凸部、略半圓 凹溝倒轉之略半圓凸部之場合亦包含於本發明之範圍內。 上述間隔d雖可根據製得的薄片之用途而任意設定,但在 作爲樹脂而使用結晶化溫度峰値之幅度爲9 °C以下之結晶 性高分子樹脂時,即使上述間隔d'爲1 0 // m以下,或是使 用間隔d至無法設置之細微轉印模型,亦可作爲轉印率或 〇 製造效率佳之表面形狀轉印樹脂薄片的製造方法。 作爲上述轉印模型的製作方法者,可採用習知之方法 ,例示有在由上述不鏽鋼、鐵鋼等所構成之轉印輥筒的表 面,施以例如鍍鉻、鍍銅、鍍鎳、鍍鎳一磷等之鍍金處理 後,對於該鍍面進行使用了金剛石刀片或金屬砥石等之除 去加工,或雷射加工,又或化學腐蝕,來施以形狀加工之 方法,不過並非爲限定於此等之方法者。 又,轉印輥筒之表面,在形成上述轉印模型之後,亦 可例如在不會損害表面形狀之精度的水準上,施以鍍鉻、 -15- 201026481 鍍銅、鍍鎳、鍍鎳-磷等之鎪金處理。 形成上述擠壓薄片的製程之後’擠壓薄片要經過薄片 面之寬幅方向呈水平地被搬運的製程。在此’擠壓薄片被 上述第一押壓輥筒與第二押壓輥筒朝水平方向壓延後’可 直接藉由搬運輥筒搬運,亦可例如第1圖所示’包含藉由 第二押壓輥筒4及設置於其上側的第三押壓輥筒被押壓的 製程,其後再藉由搬運輥筒6搬運。如此之製程的追加, 只要藉由如後述般採用之結晶性樹脂的結晶化溫度來調整 @ 即可。又,於第1圖,製得的押壓薄片2爲藉由第一押壓 輥筒3與第二押壓輥筒4被朝向比模座1更上側移動地搬 運,不過,於第一押壓輥筒3之下側設置第二押壓輥筒, 再於該下側設置第三押壓輥筒,使押壓薄片2移動於比模 座1更下側處,其後再搬運之形態亦包含於本發明之製造 方法(參照第9圖)。又,所謂水平方向,爲只要薄片面 之寬幅方向實質上與水平方向平行即可,例如薄片面之寬 幅方向即使從水平方向傾斜±30°以內的範圍之情形,本發 @ 明亦可奏效。如此之方向,由薄片之有效率搬運之點來考 量’例如只要設定在不會發生因傾斜引起從薄片的搬運輥 筒離脫等情形的範圍內即可。 於本發明,搬運的製程,係使擠壓薄片接觸於沿著擠 壓薄片的搬運方向所配置之至少4根搬運輥筒來進行,且 ’包含加上:使擠壓薄片之上表面沿著搬運方向接觸於搬 Μ輥筒後再使擠壓薄片之下表面沿著搬運方向接觸於搬運 輥筒的製程(以下亦有稱爲Α製程之情形),以及在使擠 -16- 201026481 壓薄片之下表面沿著搬運方向接觸於搬運輥筒後再使擠壓 薄片之上表面沿著搬運方向接觸於搬運輥筒的製程(以下 亦有稱爲B製程之情形)之至少1個之製程,合計2個製 程以上。只要包含有上述A製程及上述B製程合計2個以 上即可,不過以3個以上較理想,4個以上更理想。藉由 作成上述構成,比起以往之方法,由於能在較短之搬運距 離內使薄片冷卻,故即使於搬運距離受限的小空間也可生 ❹ 產。又,可抑制或控制搬運方向的凹翹,縮小薄片整體之 彎翹,且比起以往之方法,可製造平坦性優異的結晶性樹 脂板。 於上述A製程及B製程之各1製程,擠壓薄片的下表 面所接觸之搬運輥筒,擠壓薄片的上表面所接觸之搬運輥 筒爲1根,不過在各製程之間,即使再設置1根以上的搬 運輥筒,A製程及B製程合計包含2根以上,只要至少接 觸於4根搬運輥筒,則本發明可奏效。 Ο 亦即,進行上述A製程及B製程之至少1個製程,合 計2個以上之製程,例如以朝搬運方向連續之搬運輥筒連 續20根以內,或是夾介其他搬運輥筒而包含其中爲理想 ,包含於連續之搬運輥筒1 〇根以內則較爲理想,包含於 連續之搬運輥筒6根以內又更爲理想。藉由在上述搬運輥 筒之數目的範圍內,包含A製程及B製程合計2個製程以 上,可更有效率抑制或控制搬運方向之凹翹。 於第10圖(a)〜第10圖(d),爲顯示滿足如此構 成之搬運輥筒與被搬運之擠壓薄片的位置關係之斷面模式 -17- 201026481 圖。於第10圖(a)〜第10圖(d)爲顯示有關於6根搬 運輥筒,包含有上述A製程及B製程之至少1個製程,合 計包含有2個製程以上之場合的形態者。於第10圖(a) 、第10圖(b)包含有:在擠壓薄片之下表面接觸於1根 搬運輥筒後,再使擠壓薄片之下表面接觸於1根搬運輥筒 後,又再使擠壓薄片之上表面接觸於1根搬運輥筒的製程 (B製程)、及在使擠壓薄片之上表面接觸於1根搬運輥 筒後,再使擠壓薄片之下表面接觸於1根搬運輥筒的製程 @ (A製程)、以及其後又再使擠壓薄片之上表面接觸於1 根搬運輥筒的製程(第10圖(a)),或是又再使擠壓薄 片之下表面接觸於1根搬運輥筒的製程(第10圖(b)) 。於第10圖(c)爲包含有:把使擠壓薄片之下表面接觸 於1根搬運輥筒後,再使擠壓薄片之上表面接觸於1根搬 運輥筒的製程(B製程)重覆2次,又使擠壓薄片之上表 面接觸於1根搬運輥筒後,再使擠壓薄片之下表面接觸於 1根搬運輥筒的製程(A製程)。在此,於B製程之重覆 D ,由於可把於B製程之後半的擠壓薄片之下表面所接觸的 部分視爲A製程前半部分,於第2次之B製程前半的擠壓 薄片之上表面所接觸的部分視爲A製程後半部分,故於第 10圖(c),嚴密地說,包含A製程及B製程,合計包含 有4次,不過作爲考量沿著搬運方向之各製程的便利性者 ,於各製程間是不考慮重複搬運輥筒的。亦即,於第10 圖(c),成爲包含A製程1次及B製程2次,合計包含 有3個製程者。於第10圖(d),爲包含有:使擠壓薄片 -18· 201026481 之下表面接觸於1根搬運輥筒後,再使擠壓薄片之上表面 接觸於1根搬運輥筒的製程(B製程)、及使擠壓薄片之 上表面接觸於1根搬運輥筒製程、及使擠壓薄片之上表面 接觸於1根搬運輥筒後,再使擠壓薄片之下表面接觸於1 根搬運輥筒的製程(A製程)、以及又再使擠壓薄片之下 表面接觸於1根搬運輥筒的製程。 於本發明之其他理想形態,上述搬運的製程爲使薄片 φ 接觸於至少4根搬運輥筒來進行。此等4根輥筒爲沿著擠 壓薄片之搬運方向而配置者,且爲連續配置。若從搬運方 向算起排第N個之搬運輥筒作爲Rn,則於第1圖可藉由 將Ri〜R4之4根輥筒作爲搬運輥筒而具備之裝置來進行 搬運的製程。搬運輥筒只要使如此連續配置的4根輥筒以 成爲後述的條件之方式與擠壓薄片接觸即可,例如使用第 1圖之R2〜R5之4根輥筒時,本發明亦奏效。 上述搬運輥筒之數目,爲只要至少4根則該上限沒有 φ 特別限定,例如可作成1 0根,又,從裝置上的構成之點 來考量,一般爲作至300根左右。不過,即使搬運輥筒之 數目超過此數時,只要接觸於其中至少4根搬運輥筒的擠 壓薄片滿足後述之條件,則可發揮本發明之效果。又’不 論是否要調整搬運輥筒之表面溫度,若能任意調整溫度’ 則從彎翹之調整難易度之點來考量爲較理想。如此之搬運 輥筒的表面溫度之調整,只要藉由內設於搬運輥筒之溫度 調節裝置,或設置於搬運輥筒上下的發熱器等之溫度調節 裝置來進行即可。於搬運輥筒進行溫度調整來加熱擠壓薄 -19- 201026481 片之場合,由於製得的結晶性樹脂板之耐熱性更提升故較 爲理想。 於各搬運輥筒,接觸有擠壓薄片的上表面或下表面之 任一面,不過,於本發明,對於上述至少4根各搬運輥筒 ,以作成上表面與下表面沿著搬運方向交互接觸之形態較 爲理想。關於如此之接觸將隨第1圖具體說明。於第1圖 所示之搬運輥筒R!〜R4之4根搬運輥筒6接觸有擠壓薄 片2之場合,在沿著搬運方向的第一個搬運輥筒Ri接觸 @ 搬運有擠壓薄片2的下表面時,則對於第二個搬運輥筒R2 接觸有擠壓薄片2的上表面。其次,第三個搬運輥筒R3 接觸搬運有擠壓薄片2的下表面,而於第四個搬運輥筒R4 接觸搬運有擠壓薄片2的上表面。又,於第一個搬運輥筒 L接觸有擠壓薄片2的上表面時,則於第二個搬運輥筒 R2接觸有擠壓薄片2的下表面,而於第三個搬運輥筒R3 接觸有擠壓薄片2的上表面,於第四個搬運輥筒R4接觸 有擠壓薄片2的下表面。即使藉由如此對於至少4根搬運 0 輥筒,以擠壓薄片的上表面與下表面沿著搬運方向交互接 觸之方式搬運擠壓薄片的方法,亦可抑制或排除以往方法 發生之薄片搬運方向的凹翹及薄片整體的彎翹。其結果, 可使製得的結晶性樹脂板之平面性提昇。 作爲如上述般包含有A製程及B製程時之擠壓薄片與 搬運輥筒之接觸,或使擠壓薄片的上表面與下表面交互接 觸於搬運輥筒之方法者,例如可藉由在各搬運輥筒設置習 知之引導輥筒來達成。又,只要於至少4根搬運輥筒,包 -20- 201026481 含上述A製程及B製程之至少1個製程,以合計包含有2 個製程以上之方式,使擠壓薄片之各表面接觸,較佳爲使 上述擠壓薄片之各表面交互接觸,則例如5根搬運輥筒的 第五個搬運輥筒與擠壓薄片的接觸面並沒有特別限定,即 使設置比此更多之搬運輥筒的場合也是相同。 作爲上述搬運輥筒者,可使用習知之搬運輥筒。於第 2圖爲顯示明示鄰接的搬運輥筒之間距的槪略斷面圖。各 搬運輥筒之直徑D可作成所期望之大小,例如只要設定於 2 0mm〜8 00mm之直徑D即可。鄰接之第N個的搬運輥筒 Rn與第N+1個之搬運輥筒Rn+i的中心間距離以P顯示時 ,則該間距P以作成30mm〜2000mm較爲理想,作成 100mm〜800mm更爲理想。藉由作成如此之間距P,濟壓 薄片之冷卻及凹翹之抑制會更進行地更好。鄰接之搬運輥 筒的間距P並無限於一定者,第N個之搬運輥筒Rn與第 N+1個之搬運輥筒Rn+1之間距P以及第N+1個之搬運輥 φ 筒Rn+i與第N + 2個之搬運輥筒Rn + 2之間距P亦可不同。 又,搬運輥筒之間距P及直徑D之比率P/D,以〇.6〜1〇 爲理想,1〜6爲更理想。 於第1圖,係以圖示各搬運輥筒設置於垂直方向之相 同高度之場合,不過鄰接之搬運輥筒的垂直方向之高度未 必爲相同。於第3圖顯示鄰接之搬運輥筒的垂直方向之位 置關係。在把至少4根搬運輥筒沿著搬運方向順序作爲 Rm、Rm+l、Rm + 2、Rm + 3,而把擠壓薄片之擠壓薄片與垂直 方向的高度位置作爲dA時,則包含有例如像第3圖之軌 -21 - 201026481 道(A)所示般,以維持擠壓薄片dA的高度之軌道搬運之 方式配置搬運輥筒Rm、Rm+1、Rm + 2及Rm + 3之情形。又, 亦包含有例如像第3圖之軌道(B)所示般,搬運輥筒Rm 及Rm + 2係被配置於以dA之高度與擠壓薄片的下表面接觸 之位置,以搬運輥筒Rm+1與Rm + 3的中心成爲dA之高度之 方式配置於比更高的位置之形態。又,亦包含有如第 3圖之軌道(C)所示般,全部之搬運輥筒Rm〜Rm + 3被配 置於在垂直方向相同位置之形態。亦可作成如第3圖之軌 φ 道(D)所示般,搬運輥筒Rm及Rm + 2被配置於以dA之高 度與擠壓薄片的下表面接觸之位置,搬運輥筒Rm+1、與 Rm + 3的中心比dA更低,亦即被配置於比Rm更低的位置之 形態。又,上述軌道(A)〜(D)爲例示性者,垂直方 向之位置並不限於圖示者,又將軌道(A)〜(D)予以 組合,例如即使搬運輥筒Rm+1如軌道(B)般被配置,搬 運輥筒Rm + 3如軌道(D)般被配置,而彼此之垂直方向的 位置爲不同配置,本發明亦可奏效。此等之中,即使上述 · 至少4根搬運輥筒以如第3圖中之軌道(B)〜(D)所示 之軌道般配置時,搬運輥筒間之押壓薄片的移動距離也比 例如軌道(A)所示之場合更長,而押壓薄片產生冷卻, 可在短時間內製造結晶性樹脂板。 上述搬運的製程’係在以結晶性樹脂之結晶化溫度爲 T〇 ( °C ),以連續配置之4根搬運輥筒之中,沿著搬運方 向接觸於第一個搬運輥筒時之與搬運輥筒沒有接觸之側的 薄片表面之溫度爲Twarp ( °C )時,以Twarp滿足下式(1 -22- 201026481 )之條件下進行較爲理想。Tc- 30^ Twarp^ Tc+ 20 ... (1). 201026481 Further, the production method of the present invention is suitable when the crystalline resin is an acrylic resin. According to the present invention, it is possible to suppress or control the warpage of the conveyance direction by a simple method, and to reduce the warpage of the entire sheet, and to suppress the occurrence of undulation of the sheet as compared with the sheet (resin sheet) obtained by the conventional method, and to provide a kind of A resin board excellent in flatness. Further, according to the method of the present invention, since the sheet can be cooled within a short conveyance distance as compared with the conventional method, it can be produced in a small space where the conveyance distance is limited. [Embodiment] Hereinafter, the present invention will be described in more detail. In the following description of the embodiments, the same reference numerals are used in the drawings, and the same reference numerals are used in the drawings. <Production Method of Crystalline Resin Sheet> The method for producing a crystalline resin sheet of the present invention includes a process of extruding a crystalline resin into a sheet shape from a mold base 0, and a sheet form extruded The crystalline resin forms a process of extruding a sheet by calendering the roll, and a process of conveying the extruded sheet in such a manner that the width direction of the sheet surface of the extruded sheet is horizontal. The crystalline resin (hereinafter sometimes referred to simply as a resin) as defined in the present invention, as defined in the Chemical Dictionary (Tokyo Chemical Co., Ltd.), means a polymer compound in a solid state and having a crystalline property, and is in X-ray. The diffraction spectrum shows a resin (polymer) of a crystalline diffraction peak. When a resin sheet having excellent planarity is produced by extrusion molding in the case of a crystalline resin, the occurrence of warpage of the entire sheet including the warp direction in the conveyance direction as described above becomes a problem. It is effective to suppress or eliminate the warpage when the crystalline resin is extruded into a resin sheet. The crystalline resin may be composed of a single unit body, or a copolymer composed of two or more unit bodies may be used. For example, the crystalline resin may be a propylene polymer or a propylene copolymer containing 5% by mass or more of the propylene monomer unit φ. Specifically, the propylene monomer unit content is 75 to 100% by mass. The propylene monomer having a vinyl monomer unit content of 0 to 15% by mass and containing 0 to 25% by mass of a 1-butene monomer unit or a propylene-based copolymer is preferably used. It is preferable that the propylene monomer unit is 95% by mass or more, the ethylene monomer unit is 〇 5% by mass, and the propylene polymer having 〇 to 5% by mass of the 1-butene monomer unit is formed. More preferably, it is composed of a propylene polymer having a propylene monomer unit of 99% by mass or more and an ethylene monomer unit of 〇1 to 1% by mass and containing 0 to 1% by mass of a fluorene-butene olefin monomer unit. Further, the propylene monomer unit content may be 100% by mass. Further, the production method of the present invention is particularly useful for a crystalline resin, but it is also possible to suppress the warpage of the entire sheet when a thermoplastic resin or a thermosetting resin is used. Further, an additive such as a nucleating agent, a light diffusing agent, an ultraviolet absorber, a heat stabilizer, a processing stabilizer, or an antistatic agent may be added to the above resin. The blending amount of such additives is not particularly limited as long as it is adjusted and used within the scope of the present invention. In addition, the amorphous resin other than the crystalline resin may be mixed as long as it does not impair the effects of the present invention. In particular, when the resin constituting the extruded sheet is a propylene-based resin, when the acrylic resin is mixed, the refractive index of the resin is substantially equal, and it is known that the transparency of the obtained resin sheet is not impaired, and rigidity is obtained. The method of improving the mechanical properties is very useful. The light diffusing agent may be an inorganic light diffusing agent or an organic light diffusing agent. Examples of the inorganic light diffusing agent include inorganic compounds such as calcium carbonate, barium sulfate, titanium oxide, aluminum hydroxide, cerium oxide, inorganic glass, talc, mica, white carbon, magnesium oxide, and zinc oxide. Particle @. The inorganic light diffusing agent may be treated with a surface treating agent such as a fatty acid. In addition, examples of the organic light-diffusing agent include particles of an organic compound such as styrene-based polymer particles, acrylic polymer particles, and siloxane-based polymer particles. When the light diffusing agent is added, the absolute enthalpy of the difference between the refractive index of the added light diffusing agent and the refractive index of the resin is generally 0.02 or more from the viewpoint of the effect of light diffusion, and the obtained crystalline resin sheet is obtained. The point of light transmission is generally 0.25 or less. When the light diffusing agent is added to the resin, the crystalline resin sheet obtained by @ can be used as a light diffusing plate. The amount of the light diffusing agent to be added is not particularly limited and may be appropriately adjusted. When the nucleating agent is contained in the above crystalline resin, the crystallization is promoted, and the production efficiency of the sheet can be improved. The nucleating agent can be used as a nucleating agent, for example, in an amount of 0.03 to 1.0 part by mass, based on 100 parts by mass of the crystalline resin, but it is not limited thereto. The process of extruding the crystalline resin into a sheet is carried out using a die holder. -10- 201026481 As such a mold holder, a T-die made of metal which has been conventionally used for extrusion molding can be used. The resin is continuously extruded from the above mold base in a state of being heated and melted, and an extrusion machine similar to the general extrusion molding method can be used for the extrusion. The extruder can be a one-axis extruder or a two-axis extruder. The above crystalline resin is sent to a die holder in a state of being heated and melted in an extruder and pressed. The resin extruded from the die holder is extruded into a continuous sheet shape. The shape of the sheet is not particularly limited, and the thickness and the width are adjusted in accordance with the use of the obtained resin Φ sheet. Further, the extruded sheet may have a single layer structure or a laminated structure of two or more layers. These constitutions may be appropriately changed according to the use of the resin sheet obtained as described above. For example, when the light diffusing plate is used, the total thickness is generally 0.1 mm or more and 3.0 mm or less, preferably 〇5 mm or more and 3.0 mm or less, more preferably 0.8 mm or more and 3.0 mm or less. The crystalline resin extruded into the above-mentioned sheet shape is then supplied to a process of forming a pressed sheet by passing it through a calender roll. Fig. 1 is a schematic cross-sectional view showing the apparatus used for the method for producing a crystalline resin sheet of the present invention. The sheet of the crystalline resin extruded from the die holder 1 is sandwiched between the first pressing roller and the second pressing roller which are the calender rolls, and is formed into a pressing sheet 2 of a desired thickness. It is a first pressing roller and a second pressing roller which are used for the manufacture of such a resin plate, and the diameter is not particularly limited. Further, the first, second, and third pressing rollers may be mirror rollers, or may be shaped by a lens shape, an embossed shape, a magenta shape, or the like, and may be a transfer roller. The surface temperature of the pressing rolls is not particularly limited, but it is generally preferably set at 50 -11 - 201026481 ° C to 150 ° C. When the film is rolled and formed into a pressed sheet under such a temperature condition, the combination with the process of the method for producing a crystalline resin sheet after the present invention can further improve the planarity of the obtained crystalline resin sheet. . The transfer roller is a roller having a transfer mold on its surface. The transfer model is pressed against the surface of the continuous resin sheet, and the surface shape is transferred to the continuous resin sheet in a reverse pattern. The transfer model is composed, for example, of a plurality of concave portions or convex portions provided on the surface of the transfer roller, and the distance between the concave portions or the convex portions is considered to be easy to manufacture, which is generally l〇#m The above is preferably 30/zm or more, and more preferably 50ym or more. Further, the upper limit is not particularly limited, and is generally 50 〇 #m or less, more preferably 250 ym or less. Further, the depth of the groove of the concave portion or the height of the top portion of the convex portion is considered to be 30/zm to 1500/zm from the point of preparation of the transfer model, but it is not limited to this range. The ratio of the groove depth to the interval between the concave portions of the transfer model (@ groove depth/pitch interval)' or the ratio of the top height with respect to the interval between the convex portions (top height/pitch interval), as a resin When a crystalline polymer resin having a crystallizing temperature peak of 9 t or less is used, the ratio is 1 or more, and more preferably 1.2 or more, and an ideal transfer can be carried out. The ratio of the groove depth to the interval between the concave portions of the transfer model (the groove depth/pitch interval) or the ratio of the top height to the interval between the convex portions (the top height/space interval) is generally 5 or less. More preferably 3 or less. The above ratio may also be less than one. -12- 201026481 Fig. 12 is an example of a transfer mold surface, which is a cross-sectional view of a transfer model in which the cross-sectional shape is V-shaped (triangle). In Fig. 12, the cross-sectional shape of the top of the cross-sectional shape and the concave portion or the convex portion is entirely V-shaped (triangle). As shown in Fig. 12, a plurality of concave portions or convex portions are provided in the transfer model, and the distance between the concave portions or the convex portions (P〇 means the distance between the grooves of the adjacent concave portions (P in Fig. 12, ') or the distance between the tops of the adjacent convex portions (P2' in Fig. 12), the groove depth (H·) of the concave portion means the vertical distance from the surface of the transfer roller to the deepest portion of the concave portion, so-called The height of the top of the convex portion means that the vertical distance from the bottom surface of the convex portion to the surface of the transfer roller is the same as the groove depth (ΚΓ) of the concave portion in Fig. 12. When the top of the sectional shape is a V shape (triangle), The apex angle Θ' of the triangle can be made 10°~1〇〇°. The apex angle θ' can also be in the range of 1〇° to 90°. The crystallization temperature peak 作为 is 9 °C. In the case of the following crystalline polymer resin, the apex angle of the triangle is 1 〇. When the fine transfer model is ~60°, the surface shape of the obtained sheet can be accurately and accurately transferred. It is roughly equal to the transfer model. Also, as the shape of the transfer model, In the case of having a V-shaped cross-sectional shape as shown in Fig. 12, for example, a groove having a slightly semicircular concave portion (slightly semicircular concave shape) having a slightly semicircular shape as shown in Fig. 13 or, for example, The apex angle Θ' of the V-shape (triangle) formed by the straight line 11' of the V-groove-curved surface composite shape shown in Fig. 11 and the groove of the concave portion of the curved side 12'. In Fig. 13, the pitch interval ( ρ') is the same as in Fig. 12, and means the distance between the grooves of the adjacent concave portions. The groove depth (Η') of the concave portion means the vertical distance from the surface of the transfer roller to the deepest portion of the concave portion -13 - 201026481 Further, it is as if the slightly semicircular convex portion in which the groove of the semicircular concave portion is inverted is also included in the shape of the transfer model. When the transfer model is formed into a slightly semicircular convex portion, the pitch interval means the distance between the tops of the adjacent convex portions, The height of the top of the convex portion means the vertical distance from the bottom surface of the convex portion to the surface of the transfer roller. The slightly semicircle, as shown in Fig. 13, is not limited to a shape having a semi-arc shape. Alternatively, for example, like a cylindrical lens as shown in Fig. 14, the cylinder is parallel to Any of the arcuate shapes of the section when the axis is cut at a plane free of the axis, or may be a semi-elliptical arc of its cross section, or a flat portion of the semi-elliptical arc The shape of the curved shape, etc. The above-mentioned "slightly semi-circular concave portion" or "slightly semi-circular convex portion" is a concave portion or a convex portion having a cross section of such a semi-circular shape. In Fig. 15, the pitch interval (P) is Similarly to Fig. 12, it means the distance between the grooves of the adjacent concave portions or the distance between the tops of the adjacent convex portions. The groove depth (H') of the concave portion means the deepest portion from the surface of the transfer roller to the concave portion. The vertical distance of the convex portion means that the vertical distance from the bottom surface of the convex portion to the surface of the transfer roller is the same distance from the groove depth (H' Q ) of the concave portion. The above-mentioned V-shaped groove-curved composite shape For example, as shown in Fig. 16, if the cross section is provided with a vertex Θ' of a V-shape (triangle) formed by a straight line 11' and a slope formed by a curved side 12', When cutting at a plane that does not contain the axis of the cylinder containing the surface The shape of the section. The surface to be referred to herein may be a part of an arc shape, or a part of an elliptical arc shape, or may be a shape formed by a curve other than an elliptical arc shape. The above-mentioned "V-groove-curved surface composite shape concave portion" is a concave portion including a cross section of such a substantially V-shaped groove-curved surface. Further, the shape of the concave portion or the convex portion does not include a straight line portion as shown in Fig. 15, and as shown in Fig. 17, a groove having a shape formed by the intersection of the curved line 13' is included. Further, each of the concave portions or the convex portions located in the transfer mold is continuously provided as shown in Fig. 12, and is also provided at any interval d and in parallel as shown in Figs. 13 and 15. The spacing of the recesses or the spacing of the projections is selected based on the use of the resulting sheet. Further, in the present invention, the pitch interval (PO and the groove depth (H1 φ ) or the top height of the transfer model is not necessarily constant in the entire transfer model, and includes a concave portion or a convex portion which is formed adjacent to each other. In the case where the shape is different from each other, it is also included in the scope of the present invention in the case where the V-shaped convex portion in which the V-shaped groove is inverted and the slightly semi-circular convex portion in which the slightly semi-circular groove is inverted is provided. d can be arbitrarily set according to the use of the obtained sheet, but when the crystalline polymer resin having a crystallization temperature peak of 9 ° C or less is used as the resin, even if the interval d' is 1 0 // m or less, or a fine transfer model which cannot be set by using the interval d, or a method of manufacturing a surface shape transfer resin sheet which is excellent in transfer rate or ruthenium production efficiency. The conventional method is exemplified by a gold plating treatment such as chrome plating, copper plating, nickel plating, nickel-plated phosphorous or the like on the surface of a transfer roller composed of the above-described stainless steel or iron steel, and then the plating surface is subjected to the plating treatment. The method of shape processing is performed by using a diamond blade or a metal vermiculite or the like, or laser processing, or chemical etching, but is not limited to the method. Further, the surface of the transfer roller, After the transfer pattern is formed, for example, chrome plating, -15-201026481 copper plating, nickel plating, nickel-phosphorus plating, or the like may be applied to the level which does not impair the accuracy of the surface shape. After the process of pressing the sheet, the process of pressing the sheet to be horizontally conveyed through the width direction of the sheet surface is performed. Here, the sheet is rolled in the horizontal direction by the first pressing roller and the second pressing roller. The latter 'can be transported directly by the transport roller, or can be, for example, shown in FIG. 1 'containing a process of being pressed by the second pressing roller 4 and the third pressing roller disposed on the upper side thereof, and thereafter Further, it is transported by the transporting roller 6. The addition of such a process is adjusted by the crystallization temperature of the crystalline resin used as described later. Further, in the first drawing, the pressed sheet 2 is obtained. For the first pressing roller 3 and the second The pressing roller 4 is conveyed toward the upper side of the die holder 1, but a second pressing roller is disposed on the lower side of the first pressing roller 3, and a third pressing roller is disposed on the lower side. The method of moving the pressed sheet 2 to the lower side of the die holder 1 and then transporting it is also included in the manufacturing method of the present invention (see Fig. 9). Further, the horizontal direction is as long as the sheet surface is wide. The direction of the web may be substantially parallel to the horizontal direction. For example, even if the width direction of the sheet surface is within a range of ±30° from the horizontal direction, the present invention can be effective. In this direction, the sheet is efficiently transported. The point to be considered is, for example, as long as it is set so as not to be separated from the conveyance roller of the sheet due to the inclination. In the present invention, the conveyance process is such that the pressing sheet is in contact with the extrusion. At least four transport rollers arranged in the transport direction of the sheet are carried out, and 'including: the upper surface of the extruded sheet is brought into contact with the transfer roller in the transport direction, and then the lower surface of the extruded sheet is placed along The direction of handling is in contact with the carrying roller The process (hereinafter also referred to as the case of the Α process), and contacting the upper surface of the extruded sheet in the conveying direction after contacting the lower surface of the squeezing-16-201026481 sheet in the conveying direction The process of transporting the rolls (hereinafter also referred to as the case of the B process) is at least one process, and the total is two or more processes. As long as the above-mentioned A process and the above-mentioned B process are included in total of two or more, it is preferable that three or more are preferable, and four or more are preferable. According to the above configuration, since the sheet can be cooled in a short conveyance distance as compared with the conventional method, it can be produced even in a small space where the conveyance distance is limited. Further, it is possible to suppress or control the warpage in the conveyance direction, and to reduce the warpage of the entire sheet, and to manufacture a crystalline resin sheet excellent in flatness compared with the conventional method. In each of the processes of the above-mentioned A process and the B process, the transport roller that is in contact with the lower surface of the extruded sheet, the transport roller that is in contact with the upper surface of the extruded sheet is one, but between the processes, even if When one or more conveyance rolls are provided, the total number of the A process and the B process is two or more, and the present invention can be effective as long as it is in contact with at least four conveyance rolls.亦 that is, at least one process of the above-mentioned A process and B process is performed, and a total of two or more processes are performed, for example, 20 consecutive conveyance rollers in the conveyance direction, or the other conveyance rollers are included therein. Ideally, it is preferably included in the continuous conveyance roller 1 and is preferably contained within 6 continuous conveyance rollers. By including a total of two processes of the A process and the B process in the range of the number of the conveyance rollers described above, it is possible to more effectively suppress or control the warpage of the conveyance direction. Figs. 10(a) to 10(d) are cross-sectional views -17- 201026481 showing the positional relationship between the conveyance roller thus constituted and the conveyed pressed sheet. 10(a) to 10(d) are diagrams showing the case where the six transport rollers include at least one of the above-described A process and B process, and the total number of processes including two processes or more is included. . Figure 10 (a) and Figure 10 (b) include: after the surface of the extruded sheet is in contact with a conveyance roller, and then the lower surface of the extruded sheet is brought into contact with a conveyance roller, Further, the process of contacting the upper surface of the extruded sheet with a conveying roller (B process), and contacting the upper surface of the pressing sheet with a conveying roller, and then contacting the lower surface of the pressing sheet In the process of one transport roller @ (A process), and then the process of contacting the upper surface of the extruded sheet with a transport roller (Fig. 10(a)), or again The process of pressing the lower surface of the sheet to contact with a conveyance roller (Fig. 10(b)). Fig. 10(c) is a process (B process) in which the lower surface of the extruded sheet is brought into contact with one of the conveyance rollers, and the upper surface of the extruded sheet is brought into contact with one of the conveyance rollers. After the coating was applied twice, the upper surface of the extruded sheet was brought into contact with one of the conveyance rollers, and the lower surface of the extruded sheet was brought into contact with a conveyance roller (Process A). Here, in the repeated process D of the B process, since the portion touched by the lower surface of the extruded sheet in the second half of the B process can be regarded as the first half of the A process, the extruded sheet of the first half of the second B process is The part touched by the upper surface is regarded as the second half of the A process. Therefore, in Figure 10 (c), strictly speaking, the A process and the B process are included, and the total includes 4 times, but as a consideration of the various processes along the carrying direction. Convenience, the re-transport roller is not considered between the various processes. That is, in Fig. 10(c), it is included in the A process once and the B process twice, and the total includes three processes. In Fig. 10(d), the process of bringing the surface of the extruded sheet -18·201026481 into contact with a conveyance roller and then contacting the upper surface of the extruded sheet with a conveyance roller is included ( Process B), and the upper surface of the extruded sheet is brought into contact with one of the conveyance rollers, and the upper surface of the extruded sheet is brought into contact with one of the conveyance rollers, and then the lower surface of the extruded sheet is brought into contact with one. The process of transporting the rolls (A process), and the process of bringing the lower surface of the extruded sheet into contact with one of the transfer rolls. In another preferred embodiment of the present invention, the transporting process is performed by contacting the sheet φ with at least four transport rolls. These four rolls are arranged along the conveying direction of the extruded sheets, and are arranged continuously. When the Nth transport roller is used as the Rn from the transport direction, the first transfer can be carried out by means of a device provided by the four rollers of Ri to R4 as a transport roller. The conveying roller can be brought into contact with the pressing sheet so that the four rolls arranged in this manner are in a condition to be described later. For example, when four rolls of R2 to R5 in Fig. 1 are used, the present invention also works. The number of the above-mentioned conveyance rollers is not particularly limited as long as it is at least four, and is not particularly limited. For example, it can be made into ten, and it is considered to be about 300 from the point of the configuration of the apparatus. However, even if the number of the conveyance rollers exceeds this number, the effect of the present invention can be exerted as long as the extruded sheet contacting at least four of the conveyance rollers satisfies the conditions described later. In addition, whether or not it is necessary to adjust the surface temperature of the conveying roller, if the temperature can be arbitrarily adjusted, it is preferable from the point of adjusting the difficulty of bending. Such adjustment of the surface temperature of the conveyance roller may be carried out by a temperature adjustment device built in the conveyance roller or a temperature adjustment device such as a heater provided on the upper and lower sides of the conveyance roller. When the temperature of the conveyance roller is adjusted to heat the extruded thin film -19-201026481, it is preferable because the heat resistance of the obtained crystalline resin plate is further improved. Each of the transport rollers is in contact with either the upper surface or the lower surface of the extruded sheet. However, in the present invention, the at least four transport rollers are formed such that the upper surface and the lower surface are in contact with each other along the transport direction. The form is ideal. Such contact will be specifically described in Figure 1. When the four transport rollers 6 of the transport rollers R! to R4 shown in FIG. 1 are in contact with the extruded sheet 2, the first transport roller Ri in the transport direction contacts @ carries the extruded sheet. At the lower surface of 2, the upper surface of the extruded sheet 2 is contacted with respect to the second conveyance roller R2. Next, the third conveyance roller R3 is in contact with the lower surface of the extruded sheet 2, and the fourth conveyance roller R4 is in contact with the upper surface on which the extruded sheet 2 is conveyed. Further, when the first transporting roller L is in contact with the upper surface of the extruded sheet 2, the second transporting roller R2 is in contact with the lower surface of the extruded sheet 2, and is in contact with the third transporting roller R3. There is an upper surface of the extruded sheet 2, and the lower surface of the extruded sheet 2 is contacted with the fourth conveyance roller R4. Even in such a manner that the sheet is conveyed in such a manner that at least four of the 0 rolls are conveyed so that the upper surface and the lower surface of the extruded sheet are alternately contacted in the conveyance direction, the sheet conveyance direction by the conventional method can be suppressed or eliminated. The concave warp and the overall bending of the sheet. As a result, the planarity of the obtained crystalline resin sheet can be improved. As described above, the method in which the extruded sheet of the A process and the B process is in contact with the conveyance roller, or the upper surface and the lower surface of the extruded sheet are in contact with the conveyance roller, for example, The conveying roller is provided by a conventional guiding roller. Further, as long as at least four conveying rollers are included, at least one of the above-mentioned A process and the B process is included in the package -20-201026481, and the surfaces of the extruded sheets are brought into contact with each other in a total of two processes or more. It is preferable that the surfaces of the above-mentioned extruded sheets are in contact with each other, for example, the contact faces of the fifth conveying rollers of the five conveying rollers and the pressing sheets are not particularly limited, even if more conveying rollers are provided. The occasion is the same. As the conveyance roller, a conventional conveyance roller can be used. Fig. 2 is a schematic cross-sectional view showing the distance between adjacent conveying rollers. The diameter D of each of the transporting rolls can be made to have a desired size, for example, a diameter D of 20 mm to 800 mm is set. When the distance between the center of the Nth transport roller Rn adjacent to the N+1th transport roller Rn+i is P, the pitch P is preferably 30 mm to 2000 mm, and is preferably 100 mm to 800 mm. Ideal. By making such a distance P, the suppression of the cooling and the curling of the sheet is further improved. The pitch P of the adjacent conveyance rollers is not limited to a certain one, and the distance P between the Nth conveyance roller Rn and the N+1th conveyance roller Rn+1 and the N+1th conveyance roller φ cylinder Rn The distance P between +i and the N + 2 transport rollers Rn + 2 may also be different. Further, the ratio P/D of the distance P between the transport rollers and the diameter D is preferably 〇6 to 1 ,, and more preferably 1 to 6. In the first embodiment, the respective transport rollers are arranged at the same height in the vertical direction, but the heights of the adjacent transport rollers in the vertical direction are not necessarily the same. Fig. 3 shows the positional relationship of the adjacent conveying rollers in the vertical direction. When at least four conveyance rolls are sequentially referred to as Rm, Rm+l, Rm + 2, and Rm + 3 in the conveyance direction, and the height position of the extruded sheet and the vertical direction is taken as dA, For example, as shown in the track of Figure 3 - 201026481 (A), the conveyance rollers Rm, Rm+1, Rm + 2, and Rm + 3 are disposed so as to maintain the height of the extruded sheet dA. situation. Further, for example, as shown in the track (B) of Fig. 3, the transport rollers Rm and Rm + 2 are disposed at positions where the height of dA is in contact with the lower surface of the pressed sheet to transport the roller. The center of Rm+1 and Rm+3 is arranged at a higher position than the height of dA. Further, as shown in the track (C) of Fig. 3, all of the transport rollers Rm to Rm + 3 are disposed in the same position in the vertical direction. The transfer rolls Rm and Rm + 2 may be disposed at a position where the height of dA is in contact with the lower surface of the pressed sheet as shown by the track φ (D) in Fig. 3, and the transport roller Rm+1 is disposed. The center of Rm + 3 is lower than dA, that is, it is disposed at a position lower than Rm. Further, the above-described tracks (A) to (D) are exemplified, and the positions in the vertical direction are not limited to those shown in the drawings, and the tracks (A) to (D) are combined, for example, even if the conveyance roller Rm+1 is as a track. (B) As usual, the transport rollers Rm + 3 are arranged as in the track (D), and the positions in the vertical direction of each other are different, and the present invention can also be effective. Among these, even if at least four transport rollers are arranged in the same manner as the tracks shown in the tracks (B) to (D) in Fig. 3, the moving distance of the pressed sheets between the transport rollers is proportional. If the case shown by the track (A) is longer, and the pressed sheet is cooled, the crystalline resin sheet can be produced in a short time. The process of the above-described conveyance is based on the fact that the crystallization temperature of the crystalline resin is T〇(°C), and the four transfer rolls that are continuously disposed are in contact with the first conveyance roller in the conveyance direction. When the temperature of the surface of the sheet on the side where the conveying roller is not in contact is Twarp (°C), it is preferable to carry out the condition that Twarp satisfies the following formula (1-22 to 201026481).
Tc — 30^ Twarp^ Tc + 20 …(1) 薄片表面之溫度Twarp ( °c ),滿足數式(1 )時,可 縮小擠壓薄片整體之彎翹量。薄片表面之溫度Twarp ( °c ),爲Tc _ 20 ( °c )以上較爲理想,Tc + 1 ο ( t )以下則 更爲理想。於如此之場合,可再縮小擠壓薄片整體之彎翹 量。 ❹ 於本發明之製造方法,除了上述押壓輥筒或搬運輥筒 之外,於本發明亦可設置技術上無關係之輥筒。如此之輥 筒爲接觸於擠壓薄片者,可舉例如用以使擠壓薄片沿著第 一押壓輥筒與第二押壓輥筒,或是搬運輥筒之方式搬運的 引導輥筒,或用以使押壓薄片先緊貼於第二押壓輥筒或第 三押壓輥筒之接觸輥筒。作爲如此之引導輥筒或接觸輥筒 者,爲達到上述目的而使用者,可適用以往習知之輥筒。 藉由上述本發明之結晶性樹脂板的製造方法而製造的 Φ 結晶性樹脂板,與藉由以往之方法所製造的樹脂板來比較 ,由於成爲平坦性提升者,故很適合利用於背光裝置。 實施例 以下,舉實施例更詳細說明本發明,不過,本發明並 非爲限定於此等者。 (實施例1 ) [中間層材料母體膠料1之製造] -23- 201026481 將54_0質量份之丙烯一乙烯共聚合體(丙烯單體單 元含有量99質量%以上,乙烯單體單元含有量未滿1質量 % ’商品名「FSX20L8」,住友化學(株)製),及40.0 質量份之苯乙烯系聚合體粒子(平均粒徑0.8 // m,商品名 「XX3 07K」,積水化成品工業(株)製)作爲光擴散劑 ,及2.0質量份之加工安定劑(商品名「IRGAFOS168」 ,Ciba-Geigy社製),及4·0質量份之靜電防止劑(商品 名「ELECTS — 2Β」,花王(株)製)予以乾混後之後, 以180 °C〜2 50°C藉由65mm二軸擠壓機施以片狀化,而製 得片狀之中間層材料母體膠料1。 [中間層材料母體膠料2之製造] 將84.0質量份之丙烯一乙烯共聚合體(丙烯單體單 元含有量99質量%以上,乙烯單體單元含有量未滿1質量 %,商品名「FSX20L8」,住友化學(株)製),及 4.0 質量份之加工安定劑(商品名「IRGAFOS168」,Ciba-Geigy 社製) ,及4.0質量份之成核劑(有機磷酸鹽系, 商品名「ΝΑΙ 1」,ADEKA社製),及8.0質量份之靜電 防止劑(商品名「ELECTS - 2B」,花王(株)製)予以 乾混後之後,以180 °C〜250 °C藉由65mm二軸擠壓機施以 片狀化,而製得片狀之中間層材料母體膠料2。 [表層材料母體膠料之製造] 將86.0質量份之丙烯-乙烯共聚合體(丙烯單體單 201026481 元含有量99質量%以上,乙烯單體單元含有量未滿1質量 % ’商品名「FSX20L8」,住友化學(株)製),及5.0 質量份之紫外線吸收劑(苯并三唑系,商品名「LA31」, ADEKA社製),及5.0質量份之光穩定劑(受阻胺系,商 品名「Tin8 5 5FF」,Cibajapan社製),及2.0質量份之成 核劑(商品名「ΝΑΙ 1」,ADEKA社製),及2.0質量份 之加工安定劑(商品名「IRGAFOS168」,Ciba-Geigy社 ❹ 製)予以乾混後之後,以180°C〜260°C藉由65mm二軸擠 壓機施以片狀化,而製得片狀之表層材料母體膠料。 [結晶性樹脂板之製造] 於本實施例1,使用具備有第4圖所示之輥筒構成的 裝置。於模座1,具備有主擠壓機及副擠壓機(圖示省略 ),於此等擠壓機分別投入後述調配比例的樹脂等,使經 由超多層模座並以積層狀態一同擠壓出。 Q 於主擠壓機,供給以將79.0質量份之丙烯一乙烯共 聚合體(丙烯單體單元含有量99質量%以上,乙烯單體單 元含有量未滿1質量% ’商品名「FSX20L8」,住友化學 (株)製),及16.0質量份之上述中間層材料母體膠料1 ,及5.0質量份之上述中間層材料母體膠料2予以乾混後 之調和物,並以200°C〜2 50°C使之熔融。於主擠壓機之熔 融混練係在50.6rpm且759kg/h之條件下進行。 於副擠壓機,供給以將90.0質量份之丙烯-乙烯共 聚合體(丙烯單體單元含有量99質量%以上,乙烯單體單 -25- 201026481 元含有量未滿1質量%,商品名「FSX20L8」,住友化學 (株)製),及1〇.〇質量份之上述表層材料母體膠料予 以乾混後之調和物,並以19〇°C〜250°C使之熔融。於副擠 壓機之熔融混練係在41.5rpm且40.0kg/h之條件下進行。 熔融後之此等調和物,使經由超多層模座且以模座溫 度250°C〜2 60t —同擠壓出,並使用第4圖所示之輥筒構 成,製得了表面層爲〇.〇5mm,中間層(光擴散層)爲 1.1mm,表面層爲 〇.〇5mm之三層構造,合計厚度爲 魯 1.2mm,平均寬幅爲1400mm之結晶性樹脂板(A)。製得 的樹脂板之結晶化溫度爲125.1°C。 [搬運輥筒] 搬運輥筒使用了合計10個直徑D爲75 mm者。鄰接 的搬運輥筒之相對位置,係以沿著薄片搬運方向數算時之 第一個搬運輥筒(第4圖中R1)與擠壓薄片之接點的擠 壓薄片之垂直方向的高度,及鄰接於該輥筒之沿著薄片搬 Θ 運方向數算時之第二個搬運輥筒(第4圖中R2)與擠壓 薄片之接點的擠壓薄片之垂直方向的高度之差成爲7 5mm 之方式配置(參照第3圖C)。亦即,第一個搬運輥筒Ri 及第二個搬運輥筒R2之擠壓薄片的垂直方向之高度爲大 致相同。 又,鄰接的搬運輥筒之間隔,爲於第4圖之搬運輥筒 將第2圖所示之間距P作成250mm,搬運輥筒 R5〜。。之間距P作成300mm。搬運輥筒。,將表 -26- 201026481 面溫度分別設定於9 0 °C。 [搬運方法] 直至搬運輥筒R1Q,從搬運輥筒h起順序使擠壓薄片 的薄片面以交互接觸於搬運輥筒之方式通過,搬運輥筒 Rh以後爲使薄片通過搬運輥筒之上側(第4圖)。又把 搬運輥筒Rn以後的輥筒之直徑作成75mm,間距作成 φ 3 00mm ’而將輥筒的垂直方向之位置作成與r ! Q相同。又 ’搬運輥筒Ru以後的輥筒表面之溫度沒有調整。 [擠壓薄片表面溫度:Twarp] 通過沿著搬運方向數起之第一個的搬運輥筒R,時之 擠壓薄片的表面溫度,且爲與搬運輥筒沒有接觸之側的擠 壓薄片之表面溫度Twarp爲U6.0°C。 φ 〈評價:彎翹測量1> 於實施例1製得的結晶性樹脂板(A )的寬幅方向之 不同處,裁出3片400mmx400mm之大小的測試板。對於 此等測試板,分別進行彎翹測量。彎翹測量,爲載於(株 )Mitutoyo製的自然石平台(600mmx 600mm)之上,於 測試板4邊之各中點及各頂點合計8處,測量了從平台浮 起之量(距離)。對於各測試板,測量了表裡合計16點 之從平台浮起之量’將其中之最大値作爲彎翹量(1)。 測量係在室溫下進行。把分別之測試板的結果顯示於表1 -27- 201026481 及表2。 <評價:彎翹測量2> 在製得的結晶性樹脂板(A)之寬幅方向不同之處, 裁出3片400mmx400mm大小之測試板。對於此等測試板 之分別,進行了藉由目測之彎翹測量。藉由目測判定之彎 翹評價結果,爲於薄片無彎翹時作爲「〇」,於薄片有彎 翹時作爲「X」並記錄於表1。 (實施例2 ) 使用了在實施例1製作之中間層材料母體膠料1、中 間層材料母體膠料2及表層材料母體膠料,並藉由以下之 方法製造了結晶性樹脂板。 [結晶性樹脂板之製造] 於本實施例2,使用了具備有第4圖所示之輥筒構成 的裝置。於模座1,具備有主擠壓機及副擠壓機(圖示省 略),於此等之擠壓機,分別投入用後述之調配比例的樹 脂等,使經由超多層模座並以積層狀態一同擠壓出。 於主擠壓機,係供給以將83.0質量份之丙烯-乙烯 共聚合體(丙烯單體單元含有量99質量%以上,乙烯單體 單元含有量未滿1質量%,商品名「FSX20L8」,住友化 學(株)製),及12.0質量份之上述中間層材料母體膠 料1,及5.0質量份之上述中間層材料母體膠料2予以乾 201026481 混後之調和物,並以200 °C〜250 °C使之熔融。於主擠壓機 之熔融混練爲於43.6rpm且654kg/h之條件下進行。 於副擠壓機,係供給以90.0質量份之丙烯-乙烯共 聚合體(丙烯單體單元含有量99質量%以上,乙烯單體單 元含有量未滿1質量%,商品名「FSX20L8」,住友化學 (株)製)’及1〇.〇質量份之上述表層材料母體膠料予 以乾混後之調和物,並以1 9 0 °C〜2 5 0 °C使之熔融。於副擠 φ 壓機之熔融混練爲在4 8.4rpm且4 6.7kg/h之條件下進行。 經熔融之此等調和物,使經由超多層模座且以模座溫 度250 °C〜26(TC —同擠壓出,並使用第4圖所示之輥筒構 成,製得了表面層爲0.05mm,中間層(光擴散層)爲 1.4mm’表面層爲 0_05mm之三層構造,合計厚度爲 1 .5mm,平均寬幅爲1 400mm之結晶性樹脂板(B )。製得 的樹脂板之結晶化溫度爲125.VC。對於製得的結晶性樹 月旨板(B ),進行了與結晶性樹脂板(A )相同之彎翹評價 。其結果顯?K於表1及表2。 搬運輥筒及該配置方法、擠壓薄片的搬運方法爲藉由 與實施例1相同之方法進行。 [擠壓薄片表面溫度:Twarp] 通過沿著搬運方向數起之第一個的搬運輥筒Ri時之 擠壓薄片的表面溫度,且爲與搬運輥筒沒有接觸之側的擠 壓薄片之表面溫度Twarp爲119.9°C。 -29 201026481 (實施例3 ) 使用了在實施例1製作之中間層材料母體膠料1、中 間層材料母體膠料2及表層材料母體膠料,並藉由以下之 方法製造了結晶性樹脂板。 [結晶性樹脂板之製造] 於本實施例3,使用了具備有第4圖所示之輥筒構成 的裝置。於模座1,具備有主擠壓機及副擠壓機(圖示省 @ 略),於此等擠壓機分別投入後述調配比例的樹脂等,使 經由超多層模座並以積層狀態一同擠壓出。 於主擠壓機,係供給以將95.0質量份之丙烯-乙烯 共聚合體(丙烯單體單元含有量99質量%以上,乙烯單體 單元含有量未滿1質量%,商品名「FSX20L8」,住友化 學(株)製),及5.0質量份之上述中間層材料母體膠料 2予以乾混之調和物,並以200°C〜250°C使之熔融。於主 擠壓機之熔融混練爲在36.7rpm且550kg/h之條件下進行 @ 〇 於副擠壓機,係供給以將90.0質量份之丙烯-乙烯 共聚合體(丙烯單體單元含有量99質量%以上,乙烯單體 單元含有量未滿1質量%,商品名「FSX20L8」,住友化 學(株)製),及10.0質量份之上述表層材料母體膠料 予以乾混後之調和物,以190°c〜250°C使之熔融。於副擠 壓機之熔融混練爲在51.8rpm且50.0kg/h之條件下進行。 經熔融之此等調和物,使經由超多層模座且以模座溫 -30- 201026481 [擠壓薄片表面溫度:Twarp] 通過沿著搬運方向數起之第一個的搬運輥筒R1時之 擠壓薄片的表面溫度,且爲與搬運輥筒沒有接觸之側的擠 壓薄片之表面溫度Twarp爲121.(TC。 表1 實施例1 實施例2 實施例3 板厚 1·2_ 1.5mm 2.0mm 線性速度 7.25 m/min 6.80 m/min 5.74 m/min 牽引比率 1.025/0. 998/0.960 1.025/0.998/0.960 1.025/0.998/0.960 a 157.2 157.3 156.3 181.9 183.0 180.1 190.8 190.4 19.03 b 121.5 121.8 120.4 129.6 130.4 130.0 139.5 139.2 137.4 c 117.0 110.1 117.7 125.4 127.0 126.4 136.4 136.6 137.1 d 116.5 112.7 113.8 120.5 118.5 119.5 125.3 124.5 124.8 e上 117.4 116.6 117.1 123.6 122.6 122.4 131.0 131.0 131.3 e下 115.9 114.4 114.9 121.0 119.8 120.8 124.8 124.7 124.2 f上 116.8 116.0 115.6 121.6 119.9 121.0 121.5 120.9 121.3 薄 .f下 115.6 114.5 114.9 121.4 121.0 121.6 124.4 124.5 123.8 片 溫 g上 113.6 111.5 110.5 120.6 120.5 121.9 116.2 115.7 115.0 度 g下 110.4 109.3 112.1 122.0 121.2 122.1 120,1 119.8 119.5 ec h上 111.0 98.7 99.7 115.5 114.1 115.9 115.1 115.1 115.1 h下 101.4 96.0 99.5 118.2 115.0 115.1 118.7 117.4 117.0 i上 99.1 95.2 96.8 112.0 111.4 113.7 114.2 115.1 115.4 i下 97.4 92.9 96.9 114.5 111.5 112.6 117.9 116.8 117.2 j上 93.7 90.0 94.0 一 一 一 125.2 115.3 127.8 j下 107.7 88.1 93.3 --- 126.2 116.3 128.4 k上 87.6 86.5 87.7 一 一 一 116.0 112.2 115.3 k下 87.7 94.3 88.8 «Μ 一 Μ·» 116.7 114.7 116.0 輥 第一 75°C 70°C 70¾ 筒 溫 第二 80°C 75eC 75°C 度 第三 88°C 90°C 88°C 彎翹量(mm) -1.6 -0.9 -1.0 •H).5 -0.5 -0.4 -0.4 -1.0 -1.2 起伏 ο Ο Ο 〇 Ο Ο 〇 0 〇 -32- 201026481 度250 °C〜260 °C —同擠壓出,並使用第4圖所示之輥筒構 成,製得了表面層爲0.05mm,中間層(光擴散層)爲 1.9mm,表面層爲 0.05mm之三層構造,合計厚度爲 2.0mm,平均寬幅爲1400mm之結晶性樹脂板(C )。製得 的樹脂板之結晶化溫度爲125.3°C。對於製得的結晶性樹 脂板(C),進行了與結晶性樹脂板(A)相同之彎翹評價 。其結果顯示於表1及表2。 搬運輥筒及該配置方法、擠壓薄片的搬運方法爲藉由 與實施例1相同之方法進行。 [擠壓薄片表面溫度:Twarp] 通過沿著搬運方向數起之第一個的搬運輥筒R,時之 擠壓薄片的表面溫度,且爲與搬運輥筒沒有接觸之側的擠 壓薄片之表面溫度Twarp爲120.9°C。 (比較例1 ) @ 除了將搬運方法變更成以下之條件外,爲藉由與實施 例2相同之方法製造了結晶性樹脂板。對於製得的結晶性 樹脂板’進行了與實施例1同樣的彎翹評價。其結果顯示 於表2。 [搬運方法] 使薄片通過於所有搬運輥筒之上側(第5圖)。搬運 輥筒之大小或間距等作成與實施例2相同。 -31 - 201026481 於表1,薄片溫度之符號a〜k爲顯示進行了押壓薄片 的溫度測量之處,此等已模式顯示於第4圖°於a〜k各 處,測量了於寬幅方向不同之3點的薄片溫度’該等3點 之薄片溫度已記載於表1。又於符號f之測量’ 「f上」係 顯示當搬運輥筒化,與押壓薄片接觸時之沒有接觸於搬運 輥筒之側的押壓薄片2的表面。於除此之外的符號e〜k, 係把在押壓薄片2將要接觸於各搬運輥筒之前的押壓薄片 〇 之上表面與下表面分別用「上」、「下」之表記顯示。線 性速度(m/min )爲顯示來自模座的擠壓速度,牽引比率 ,爲顯示在第三押壓輥筒5及搬運輥筒6及圖面上無顯示 之牽引輥筒的押壓薄片之牽引比例之比,於本實施例及比 較例爲作成第三押壓輥筒5/搬運輥筒 6/牽引輥筒 = 1.025 / 0.998 / 0.960 ° 表1之輥筒溫度之欄的「第一」、「第二」、「第三 」分別顯示第一押壓輥筒、第二押壓輥筒、第三押壓輥筒 Q 。關於彎翹量,皆爲顯示最大値,數値之前的「-」表示 彎翹爲比薄片搬運之水平方向更凹陷,「+」表示彎翹爲 比薄片搬運之水平方向更凸出。 表2 彎翹量(mm) 實施例1 實施例2 實施例3 比較例1 1.6 0.5 0.4 4.0 0.9 0.5 1.0 6.1 1.0 0.4 1.2 6.0 -33- 201026481 根據表2之結果可明顯得知,對應於藉由本發明的方 法所製造之結晶性樹脂板之各測試板的彎翹量,比起對應 於藉由以往的方法製得之結晶性樹脂板的測試板,結果皆 能抑制彎翹。又,該彎翹量之絕對値,亦得知最大可減低 5.9mm 〇 (實施例4 ) φ [中間層材料母體膠料3之製造] 在將85.0質量份之丙烯-乙烯共聚合體(丙烯單體 單元含有量99質量%以上,乙烯單體單元含有量未滿1質 量%,商品名「E111G」,PRIME POLYMER (株)製), 及5.0質量份之受阻胺系光穩定劑(商品名「Chimasorb U9FL」,Cibajapan (株)製),及4.0質量份之加工安 定劑(商品名「Sumilizer GP」,住友化學(株)製), 以及6.0質量份之成核劑(商品名「HPN-2〇E」, @ MILLIKEN JAPAN (株)製)予以乾混後,以1 8 0 °C〜2 6 0 °C藉由65mm二軸擠壓機施以片狀化,而製得片狀之中間 層材料母體膠料3。 [結晶性樹脂板之製造] 於本實施例4,使用了具備有第9圖所示之輥筒構成 的裝置。於模座1,具備有擠壓機,投入後述調配比例的 樹脂等,使之經由進料模塊座並以單層狀態擠壓出。 -34- 201026481 於主擠壓機,係供給以將95.0質量份之丙烯一乙稀 共聚合體(丙烯單體單元含有量99質量%以上,乙烯單體 單元含有量未滿1質量%,商品名「E111G」,PRIME POLYMER (株)製),及5.0質量份之上述中間層材料母 體膠料3予以乾混之調和物,並以200 °C〜250 °C使之熔融 。於主擠壓機之熔融混練爲在12.6rpm且28 1kg/h之條件 下進行。 e 使上述經熔融之調和物,經由進料模塊座且以模座溫 度25〇°C〜265 °C擠壓出,並使用第9圖所示之輥筒構成, 製得單層構造,且厚度爲0.6 mm,平均寬幅爲1 1 00mm之 結晶性樹脂板(B )。製得的樹脂板之結晶化溫度爲125.0 °C 。 [搬運輥筒] 搬運輥筒係使用了合計6個直徑D爲60mm者。鄰接 # 的搬運輥筒之相對位置,係以沿著薄片搬運方向數算時之 第一個的搬運輥筒(第9圖中R!)與擠壓薄片之接點的擠 壓薄片之垂直方向的高度,及鄰接於該輥筒之沿著薄片搬 運方向數算時之第二個的搬運輥筒(第9圖中R2)與擠壓 薄片之接點的擠壓薄片之垂直方向的高度之差成爲60mm 之方式配置(參照第3圖C)。亦即,第一個的搬運輥筒 R,及第二個的搬運輥筒R2之擠壓薄片之垂直方向的高度 爲大致相同。 又,鄰接的搬運輥筒之間隔,於第9圖之搬運輥筒R! -35- 201026481 〜R6,爲把第2圖所示之間距P作成300mm,搬運輥筒的 表面溫度沒有分別調整而是在室溫條件下進行了結晶性樹 脂板的製造。 [搬運方法] 直至搬運輥筒R6,如第9圖所示,使擠壓薄片以接觸 於搬運輥筒R!的上側、搬運輥筒R2的下側、搬運輥筒R3 及r4的上側、搬運輥筒R5及R6的下側之方式通過,而 搬運輥筒R7以後爲使薄片接觸於搬運輥筒的上側地通過 。又搬運輥筒R7以後的輥筒之直徑爲作成60mm,間距爲 作成3 00mm,搬運輥筒117以後的輥筒表面之溫度無調整 〇 [擠壓薄片表面溫度:Twarp] 通過沿著搬運方向數起之第一個的搬運輥筒Rl時之 擠壓薄片的表面溫度,且爲與搬運輥筒沒有接觸之側的擠 壓薄片之表面溫度1^^爲111.6°C。 對於製得的擠壓薄片進行了與實施例1同樣的評價。 其結果顯示於後述之表3。 2 例 較 比 Γν 除了將搬運方法變更成以下之條件外,藉由與胃施例 4相同之方法製造了結晶性樹脂板。對於製得的|^^#樹 脂板,進行了與實施例1同樣的彎翹評價。其結果顯示於 -36- 201026481Tc — 30^ Twarp^ Tc + 20 (1) The temperature of the sheet surface, Twarp ( °c ), satisfies the formula (1), and reduces the amount of warpage of the extruded sheet as a whole. The temperature Twarp ( °c ) of the sheet surface is preferably Tc _ 20 ( °c ) or more, and more preferably Tc + 1 ο ( t ) or less. In such a case, the overall bending amount of the extruded sheet can be further reduced. In the manufacturing method of the present invention, in addition to the above-described pressing roller or conveying roller, a roller which is technically unrelated may be provided in the present invention. Such a roller is in contact with the extruded sheet, for example, a guide roller for carrying the extruded sheet along the first pressing roller and the second pressing roller, or carrying the roller. Or to make the pressing sheet adhere to the contact roller of the second pressing roller or the third pressing roller. As such a guide roller or a contact roller, in order to achieve the above object, a conventionally known roller can be applied. The Φ crystalline resin sheet produced by the method for producing a crystalline resin sheet of the present invention is more suitable for use in a backlight device because it is improved in flatness as compared with a resin sheet produced by a conventional method. . EXAMPLES Hereinafter, the present invention will be described in more detail by way of Examples. However, the present invention is not limited thereto. (Example 1) [Production of Intermediate Layer Material Master Compound 1] -23- 201026481 54-by mass parts of propylene-ethylene copolymer (the content of the propylene monomer unit is 99% by mass or more, and the content of the ethylene monomer unit is not sufficient) 1% by mass of 'product name "FSX20L8", manufactured by Sumitomo Chemical Co., Ltd.), and 40.0 parts by mass of styrene polymer particles (average particle size 0.8 / m, trade name "XX3 07K", Sekisui finished product industry ( As a light diffusing agent, 2.0 parts by mass of a processing stabilizer (trade name "IRGAFOS168", manufactured by Ciba-Geigy Co., Ltd.), and 4.0 parts by mass of an antistatic agent (trade name "ELECTS — 2", After being dry-mixed, Kao Co., Ltd. was subjected to sheeting at 180 ° C to 2 50 ° C by a 65 mm two-axis extruder to obtain a sheet-like intermediate layer material mother compound 1. [Production of the intermediate layer material base compound 2] 84.0 parts by mass of the propylene-ethylene copolymer (the monomer content of the propylene monomer unit is 99% by mass or more, and the content of the ethylene monomer unit is less than 1% by mass, and the product name is "FSX20L8". , Sumitomo Chemical Co., Ltd., and 4.0 parts by mass of processing stabilizer (trade name "IRGAFOS168", manufactured by Ciba-Geigy Co., Ltd.), and 4.0 parts by mass of nucleating agent (organic phosphate system, trade name "ΝΑΙ 1 8.0 parts by mass of an antistatic agent (trade name "ELECTS - 2B", manufactured by Kao Corporation), and then dry-mixed at 180 °C to 250 °C by a 65 mm biaxial extrusion. The press was flaky, and a sheet-like intermediate layer material mother compound 2 was obtained. [Production of the surface layer material mother compound] 86.0 parts by mass of the propylene-ethylene copolymer (the monomer content of the propylene monomer unit: 201026481 is 99% by mass or more, and the content of the ethylene monomer unit is less than 1% by mass.) The product name "FSX20L8" , Sumitomo Chemical Co., Ltd., and 5.0 parts by mass of UV absorber (benzotriazole system, trade name "LA31", manufactured by ADEKA), and 5.0 parts by mass of light stabilizer (hindered amine system, trade name) "Tin8 5 5FF", manufactured by Cibajapan Co., Ltd., and 2.0 parts by mass of nucleating agent (trade name "ΝΑΙ 1", manufactured by ADEKA), and 2.0 parts by mass of processing stabilizer (trade name "IRGAFOS168", Ciba-Geigy After being dry-mixed, it was subjected to sheeting at 180 ° C to 260 ° C by a 65 mm two-axis extruder to obtain a sheet-like surface layer mother compound. [Production of Crystalline Resin Sheet] In the first embodiment, a device comprising a roller shown in Fig. 4 was used. The die holder 1 is provided with a main extruder and a sub-extrusion machine (not shown), and the extruders are respectively put into a resin or the like of a ratio to be described later, and are extruded together in a laminated state via the super-multilayer mold base. Out. Q. In a main extruder, 79.0 parts by mass of a propylene-ethylene copolymer (a monomer content of propylene monomer unit of 99% by mass or more and a content of ethylene monomer unit of less than 1% by mass of product name "FSX20L8") was supplied to Sumitomo. Chemical Co., Ltd., and 16.0 parts by mass of the above intermediate layer material mother compound 1 and 5.0 parts by mass of the above intermediate layer material parent compound 2 are dry blended, and are 200 ° C to 2 50 °C to melt it. The melt kneading in the main extruder was carried out at 50.6 rpm and 759 kg/h. In a sub-extruder, 90.0 parts by mass of a propylene-ethylene copolymer (the content of the propylene monomer unit is 99% by mass or more, and the content of the ethylene monomer alone -25,264,481, the content of the product is less than 1% by mass, the product name is " FSX20L8", manufactured by Sumitomo Chemical Co., Ltd., and 1 part by mass of the above-mentioned surface layer parent material, which is dry blended, and melted at 19 ° C to 250 ° C. The melt kneading of the sub-extrusion machine was carried out at 41.5 rpm and 40.0 kg/h. The blended material after melting is extruded through a super-multilayer mold base and at a mold base temperature of 250 ° C to 2 60 t, and is formed by using a roller shown in FIG. 4 to obtain a surface layer of 〇. 〇 5 mm, the intermediate layer (light diffusion layer) is 1.1 mm, and the surface layer is a three-layer structure of 〇.〇5 mm, and the total thickness is 1.2 mm, and the average width is 1400 mm of the crystalline resin plate (A). The crystallization temperature of the obtained resin sheet was 125.1 °C. [Transport Roller] A total of 10 diameters D of 75 mm were used for the transport roller. The relative position of the adjacent conveying rollers is the height in the vertical direction of the pressing sheet of the first conveying roller (R1 in FIG. 4) and the contact point of the pressing sheet when counting along the sheet conveying direction. And the difference between the height of the second conveyance roller (R2 in Fig. 4) adjacent to the roller in the direction in which the roller is moved in the direction of the sheet conveyance is perpendicular to the height of the extrusion sheet of the contact point of the extruded sheet 7 5mm mode configuration (refer to Figure 3C). That is, the heights of the pressing sheets of the first conveying roller Ri and the second conveying roller R2 are substantially the same in the vertical direction. Further, the interval between the adjacent conveyance rollers is 250 mm between the conveyance rollers of Fig. 4 and the distance P shown in Fig. 2, and the conveyance rollers R5 to. . The distance P is made 300mm. Carrying rollers. , set the surface temperature of Table -26- 201026481 to 90 °C. [Transportation Method] Up to the conveyance roller R1Q, the sheet surface of the extruded sheet is sequentially passed through the conveyance roller from the conveyance roller h, and the conveyance roller Rh is passed to the upper side of the conveyance roller. Figure 4). Further, the diameter of the roller after the conveyance roller Rn was 75 mm, the pitch was made φ 3 00 mm ', and the position of the roller in the vertical direction was made the same as r ! Further, the temperature of the surface of the roller after the conveyance of the roller Ru was not adjusted. [Extrusion sheet surface temperature: Twarp] The surface temperature of the sheet is pressed by the first transport roller R which is counted in the conveyance direction, and is the extruded sheet on the side which is not in contact with the conveyance roller. The surface temperature Twarp is U6.0 °C. φ <Evaluation: Bending measurement 1> Three test pieces of a size of 400 mm x 400 mm were cut out at the difference in the width direction of the crystalline resin plate (A) obtained in Example 1. For these test panels, bending measurements were made separately. The bending measurement was carried out on a natural stone platform (600 mm x 600 mm) manufactured by Mitutoyo Co., Ltd., and the total amount of the midpoints and the vertices at the side of the test panel 4 was measured, and the amount of floating from the platform (distance) was measured. . For each test panel, the total amount of floating from the platform at 16 points in the table was measured, and the maximum 値 was used as the amount of warpage (1). The measurement is carried out at room temperature. The results of the respective test panels are shown in Table 1 -27- 201026481 and Table 2. <Evaluation: Bending measurement 2> Three test pieces of a size of 400 mm x 400 mm were cut out in the difference in the width direction of the obtained crystalline resin plate (A). For each of these test panels, a bend measurement by visual inspection was performed. The results of the evaluation of the bending by visual observation were as "〇" when the sheet was not warped, and as "X" when the sheet was bent, and recorded in Table 1. (Example 2) An intermediate layer material mother compound 1, an intermediate layer material mother compound 2, and a surface layer mother material prepared in Example 1 were used, and a crystalline resin sheet was produced by the following method. [Production of crystalline resin sheet] In the second embodiment, an apparatus having a roll having the fourth embodiment shown in the drawings was used. The die holder 1 is provided with a main extruder and a sub-extrusion machine (not shown), and the extruders of these are respectively put into a resin or the like which is described later, and are laminated via a super-multilayer mold base. The state is squeezed out together. The main extruder is supplied with 83.0 parts by mass of a propylene-ethylene copolymer (the content of the propylene monomer unit is 99% by mass or more, and the content of the ethylene monomer unit is less than 1% by mass, and the product name is "FSX20L8", Sumitomo Chemicals Co., Ltd., and 12.0 parts by mass of the above intermediate layer material precursor compound 1, and 5.0 parts by mass of the above intermediate layer material parent compound 2 are dried and mixed with 201026481, and are mixed at 200 ° C to 250 ° °C to melt it. The melt kneading in the main extruder was carried out at 43.6 rpm and 654 kg/h. In a sub-extruder, 90.0 parts by mass of a propylene-ethylene copolymer (the content of the propylene monomer unit is 99% by mass or more, and the content of the ethylene monomer unit is less than 1% by mass, the product name "FSX20L8", Sumitomo Chemical Co., Ltd.) (manufactured by the company) 'and 1 〇. 〇 parts by mass of the above-mentioned surface layer of the mother compound after dry blending, and melted at 19 ° ° ~ 250 ° C. The melt kneading in a secondary extrusion φ press was carried out at 4 8.4 rpm and 4 6.7 kg/h. The blends are melted and formed through a super-multilayer mold base and at a mold base temperature of 250 ° C to 26 (TC - and extruded, and using the roll shown in Fig. 4, the surface layer is 0.05 Mm, the intermediate layer (light diffusion layer) is a three-layer structure of 1.4 mm' surface layer of 0_05 mm, and the total thickness is 1.5 mm, and the average width is 1 400 mm of the crystalline resin plate (B). The crystallization temperature was 125.VC. The obtained crystallinity plate (B) was subjected to the same bending evaluation as that of the crystalline resin plate (A). The results are shown in Table 1 and Table 2. The conveyance roller, the arrangement method, and the method of conveying the extruded sheet were carried out in the same manner as in Example 1. [Extrusion sheet surface temperature: Twarp] The first conveyance roller which was counted by the conveyance direction The surface temperature of the extruded sheet at the time of Ri, and the surface temperature Twarp of the extruded sheet on the side not in contact with the conveyance roller was 119.9 ° C. -29 201026481 (Example 3) was used in the middle of the production of Example 1. Layer material parent compound 1, intermediate layer material mother compound 2 and surface material parent compound, A crystalline resin sheet was produced by the following method. [Production of Crystalline Resin Sheet] In the third embodiment, a device having a roll having the shape shown in Fig. 4 was used. The mold base 1 was provided with a main body. The extruder and the sub-extruder (slightly shown in the figure) are used, and the extruders are respectively put into a resin or the like which will be described later, and are extruded together in a laminated state via the super-multilayer mold base. In the case of the propylene-ethylene copolymer (the propylene monomer unit content is 99% by mass or more, and the ethylene monomer unit content is less than 1% by mass, the product name "FSX20L8", Sumitomo Chemical Co., Ltd.) And 5.0 parts by mass of the above intermediate layer material precursor compound 2 is dry blended and melted at 200 ° C to 250 ° C. The melt kneading in the main extruder is at 36.7 rpm and 550 kg Under the condition of /h, the product was supplied in an amount of 90.0 parts by mass of the propylene-ethylene copolymer (the content of the propylene monomer unit was 99% by mass or more, and the content of the ethylene monomer unit was less than 1% by mass). , the product name "FSX20L8", Sumitomo Chemical Co., Ltd. And 10.0 parts by mass of the above-mentioned surface layer precursor compound is dry-mixed, and melted at 190 ° C to 250 ° C. The melt kneading in the sub-extruder is at 51.8 rpm and 50.0 kg / Under the condition of h. The fusion is melted through the super-multilayer mold base and the mold base temperature is -30-201026481 [extruded sheet surface temperature: Twarp] by the first one along the conveying direction The surface temperature of the extruded sheet when the roll R1 was conveyed, and the surface temperature Twarp of the extruded sheet on the side not in contact with the conveyance roll was 121. (TC. Table 1 Example 1 Example 2 Example 3 Plate thickness 1·2_ 1.5 mm 2.0 mm Linear velocity 7.25 m/min 6.80 m/min 5.74 m/min Traction ratio 1.025/0. 998/0.960 1.025/0.998/0.960 1.025/ 0.998/0.960 a 157.2 157.3 156.3 181.9 183.0 180.1 190.8 190.4 19.03 b 121.5 121.8 120.4 129.6 130.4 130.0 139.5 139.2 137.4 c 117.0 110.1 117.7 125.4 127.0 126.4 136.4 136.6 137.1 d 116.5 112.7 113.8 120.5 118.5 119.5 125.3 124.5 124.8 e 117.4 116.6 117.1 123.6 122.6 122.4 131.0 131.0 131.3 e115.9 114.4 114.9 121.0 119.8 120.8 124.8 124.7 124.2 f on 116.8 116.0 115.6 121.6 119.9 121.0 121.5 120.9 121.3 thin.f under 115.6 114.5 114.9 121.4 121.0 121.6 124.4 124.5 123.8 sheet temperature g on 113.6 111.5 110.5 120.6 120.5 121.9 116.2 115.7 115.0 degrees g under 110.4 109.3 112.1 122.0 121.2 122.1 120,1 119.8 119.5 ec h on 111.0 98.7 99.7 115.5 114.1 115.9 115.1 115.1 115.1 h under 101.4 96.0 99.5 118.2 115.0 115.1 118.7 117.4 117.0 i on 99.1 95.2 96.8 112.0 111.4 113.7 114.2 115.1 115.4 i under 97.4 92.9 96.9 114.5 11 1.5 112.6 117.9 116.8 117.2 j on 93.7 90.0 94.0 one by one 125.2 115.3 127.8 j under 107.7 88.1 93.3 --- 126.2 116.3 128.4 k on 87.6 86.5 87.7 one by one 116.0 112.2 115.3 k under 87.7 94.3 88.8 «Μ一Μ·» 116.7 114.7 116.0 Roll first 75 ° C 70 ° C 702⁄4 barrel temperature second 80 ° C 75eC 75 ° C degree third 88 ° C 90 ° C 88 ° C bending amount (mm) -1.6 -0.9 -1.0 • H) .5 -0.5 -0.4 -0.4 -1.0 -1.2 Undulating ο Ο Ο 〇Ο Ο 〇0 〇-32- 201026481 Degree 250 °C ~ 260 °C - Squeeze out and use the roller shown in Figure 4 A crystalline resin plate (C) having a surface layer of 0.05 mm, an intermediate layer (light diffusion layer) of 1.9 mm, a surface layer of 0.05 mm, and a total thickness of 2.0 mm and an average width of 1400 mm was obtained. . The resulting resin sheet had a crystallization temperature of 125.3 °C. The obtained crystal resin board (C) was subjected to the same bending evaluation as that of the crystalline resin sheet (A). The results are shown in Tables 1 and 2. The conveyance roller, the arrangement method, and the method of conveying the extruded sheet were carried out in the same manner as in Example 1. [Extrusion sheet surface temperature: Twarp] The surface temperature of the sheet is pressed by the first transport roller R which is counted in the conveyance direction, and is the extruded sheet on the side which is not in contact with the conveyance roller. The surface temperature Twarp was 120.9 °C. (Comparative Example 1) @ A crystalline resin sheet was produced by the same method as in Example 2 except that the transportation method was changed to the following conditions. The same bending evaluation as in Example 1 was carried out on the obtained crystalline resin sheet'. The results are shown in Table 2. [Transportation method] The sheet was passed over the upper side of all the conveyance rolls (Fig. 5). The size, pitch, and the like of the transporting rolls are the same as in the second embodiment. -31 - 201026481 In Table 1, the symbols a to k of the sheet temperature are the places where the temperature measurement of the pressed sheet is displayed. These patterns are shown in Fig. 4, in a to k, and measured in width. The sheet temperature at three points different in direction 'the sheet temperatures of these three points are shown in Table 1. Further, the measurement of the symbol f "f" indicates the surface of the pressing sheet 2 which is not in contact with the side of the conveying roller when the conveying roller is brought into contact with the pressing sheet. The symbols e to k other than the above are displayed on the upper surface and the lower surface of the pressed sheet 之前 before the pressing sheet 2 is to be in contact with each of the transporting rolls, by "upper" and "lower", respectively. The linear speed (m/min) is the extrusion speed from the mold base, and the traction ratio is shown on the third pressing roller 5 and the conveying roller 6 and the pressing sheet of the traction roller which is not displayed on the drawing surface. The ratio of the traction ratio is "first" in the column of the roller temperature of the first pressing roller 5 / conveying roller 6 / traction roller = 1.025 / 0.998 / 0.960 ° in the present embodiment and the comparative example. The "second" and "third" respectively display the first pressing roller, the second pressing roller, and the third pressing roller Q. Regarding the amount of warpage, the maximum 値 is displayed, and the "-" before the number 値 indicates that the warp is more concave than the horizontal direction of the sheet conveyance, and the "+" indicates that the warp is more convex than the horizontal direction of the sheet conveyance. Table 2 Bending amount (mm) Example 1 Example 2 Example 3 Comparative Example 1 1.6 0.5 0.4 4.0 0.9 0.5 1.0 6.1 1.0 0.4 1.2 6.0 -33- 201026481 According to the results of Table 2, it is apparent that The amount of warpage of each of the test sheets of the crystalline resin sheet produced by the method of the present invention is suppressed as compared with the test sheet corresponding to the crystalline resin sheet obtained by the conventional method. Moreover, the absolute enthalpy of the amount of warpage was also found to be 5.9 mm at the maximum (Example 4) φ [Production of the intermediate layer material mother compound 3] 85.0 parts by mass of the propylene-ethylene copolymer (propylene monomer) The content of the bulk unit is 99% by mass or more, the content of the ethylene monomer unit is less than 1% by mass, and the product name is "E111G", manufactured by PRIME POLYMER Co., Ltd., and 5.0 parts by mass of the hindered amine light stabilizer (trade name " Chimasorb U9FL", manufactured by Cibajapan Co., Ltd., and 4.0 parts by mass of processing stabilizer (trade name "Sumilizer GP", manufactured by Sumitomo Chemical Co., Ltd.), and 6.0 parts by mass of nucleating agent (trade name "HPN-2") 〇E", @MILIKEN JAPAN Co., Ltd.), after dry blending, is flaky at 180 °C to 260 °C by a 65 mm two-axis extruder to obtain a sheet-like intermediate Layer material parent compound 3. [Production of crystalline resin sheet] In the fourth embodiment, an apparatus having a roll having the ninth drawing was used. The mold base 1 is provided with an extruder, and a resin or the like which is blended in a ratio to be described later is introduced and extruded through a feed module holder in a single layer state. -34-201026481 The main extruder is supplied with 95.0 parts by mass of a propylene-ethylene copolymer (the content of the propylene monomer unit is 99% by mass or more, and the content of the ethylene monomer unit is less than 1% by mass, trade name "E111G", manufactured by PRIME POLYMER Co., Ltd., and 5.0 parts by mass of the above intermediate layer material mother compound 3 are dry blended and fused at 200 ° C to 250 ° C. The melt kneading in the main extruder was carried out at 12.6 rpm and 28 1 kg/h. e that the melted blend is extruded through a feed module holder at a mold base temperature of 25 ° C to 265 ° C and formed using a roll shown in Fig. 9, to obtain a single layer structure, and A crystalline resin sheet (B) having a thickness of 0.6 mm and an average width of 1 00 mm. The resulting resin sheet had a crystallization temperature of 125.0 °C. [Transport Roller] A total of six diameters D of 60 mm were used for the transport roller. The relative position of the conveying roller adjacent to # is the vertical direction of the pressing sheet of the first conveying roller (R! in Fig. 9) which is counted along the sheet conveying direction and the contact point of the extruded sheet. The height, and the height of the second direction of the transport roller (R2 in Fig. 9) adjacent to the roller in the direction in which the sheet is transported, and the height of the extruded sheet of the joint of the extruded sheet The difference is 60 mm (see Fig. 3C). That is, the height of the first conveying roller R and the pressing sheet of the second conveying roller R2 in the vertical direction are substantially the same. Further, the interval between the adjacent transport rollers is the transport roller R!-35-201026481 to R6 in Fig. 9, and the distance P between the two shown in Fig. 2 is 300 mm, and the surface temperature of the transport roller is not adjusted separately. The production of a crystalline resin sheet was carried out under room temperature conditions. [Transportation method] Up to the conveyance roller R6, as shown in Fig. 9, the pressing sheet is brought into contact with the upper side of the conveyance roller R!, the lower side of the conveyance roller R2, and the upper side of the conveyance rollers R3 and r4, and conveyed. The lower side of the rolls R5 and R6 passes, and the conveyance roll R7 is passed after the sheet is brought into contact with the upper side of the conveyance roll. Further, the diameter of the roller after the conveyance of the roller R7 is 60 mm, the pitch is made to be 300 mm, and the temperature of the surface of the roller after the conveyance roller 117 is not adjusted. [Squeezing sheet surface temperature: Twarp] The surface temperature of the extruded sheet at the time of the first conveying roller R1 and the surface temperature of the extruded sheet on the side not in contact with the conveying roller was 111.6 °C. The same evaluation as in Example 1 was carried out on the obtained extruded sheet. The results are shown in Table 3 below. 2 Examples Comparative Γν A crystalline resin sheet was produced by the same method as that of the stomach example 4 except that the transportation method was changed to the following conditions. The same bending evaluation as in Example 1 was carried out on the obtained |^^# resin board. Showing results for -36- 201026481
[搬運方法] 使薄片通過於所有搬運輥筒之上側(第 n H)。搬 運輥筒之大小或間距等作成與實施例4相胃。 [擠壓薄片表面溫度:Twarp] ❹ 通過沿著搬運方向數起之第一個的搬運輥筒Ri時之 擠壓薄片的表面溫度,且爲與搬運輥筒沒有接觸之側的擠 壓薄片之表面溫度丁^^爲112.0。(:。 ❹ -37- 201026481[Transportation method] The sheet was passed over the upper side of all the conveyance rolls (nh). The size or pitch of the transport roller was made to be in the stomach of Example 4. [Extrusion sheet surface temperature: Twarp] 表面 The surface temperature of the extruded sheet when the first one of the conveyance rollers Ri is counted in the conveyance direction, and the extruded sheet on the side not in contact with the conveyance roller The surface temperature was 112.0. (:. ❹ -37- 201026481
表3 實施例4 比較例2 板厚 0· 6mm 0. 6ππ 線性速度 3.38 m/min 3.38 m/min 牽引比率 1.012/1.006/1.000 1.012/1.006/1.000 a 127.9 125.9 121.3 一 «μ 一 b 118.0 123.8 116.0 一. C上 107.9 111.6 107.9 一 一 c下 112.7 113.2 109.2 一 一 d上 101.3 107.1 96.9 一 _ — 着 d下 103.9 107.7 98.8 Μ» 一 得 片 e上 92.7 100.-7 88.9 一 _ — 溫 e下 95.7 103.7 92.6 一 — 一 皮 f 92.6 99.3 87.2 一 一 一 g上 83.9 90.2 79.0 一 一 一 g下 86.6 92.3 78.8 一 一 一 h上 79.6 86.1 72,4 一 _ — h下 81.4 87.4 74.6 一 一 i上 71.8 81.7 67.9 一 一 一 i下 78.8 82.8 73.2 一 — 輥 筒 溫 第一 90°C 90¾ 弟— 110°C 110°C 度 第三 135°C 135°C 起伏 〇 〇 〇 X X XTable 3 Example 4 Comparative Example 2 Plate thickness 0·6 mm 0. 6ππ Linear velocity 3.38 m/min 3.38 m/min Traction ratio 1.012/1.006/1.000 1.012/1.006/1.000 a 127.9 125.9 121.3 A «μ a b 118.0 123.8 116.0 I. C on 107.9 111.6 107.9 one by one under 112.7 113.2 109.2 one by one on 101.3 107.1 96.9 one _ — d under 103.9 107.7 98.8 Μ» one piece of e on 92.7 100.-7 88.9 one _ — warm e under 95.7 103.7 92.6 one - one skin f 92.6 99.3 87.2 one by one g on 83.9 90.2 79.0 one by one g under 86.6 92.3 78.8 one by one h on 79.6 86.1 72,4 one _ — h under 81.4 87.4 74.6 one one i on 71.8 81.7 67.9 One by one i under 78.8 82.8 73.2 one - roller temperature first 90 ° C 903⁄4 brother - 110 ° C 110 ° C degree third 135 ° C 135 ° C 〇〇〇 〇〇〇
如此’根據本發明之方法,得知於以往之裝置的構成 ’只要變更搬運方法,即可製造明顯抑制彎翹之平坦性優 異的結晶性樹脂板。 如上述般說明了關於本發明之實施形態及實施例,不 過’將上述之各實施形態及實施例之構成予以適當組合亦 是當初即有之預定。 此次揭示之實施形態及實施例,應視爲在所有點上皆 -38- 201026481 爲例示,而並非限制者。本發明之範圍並非爲上述之說明 ,是根據申請專利之範圍而顯示,意圖爲包含有與專利請 求之範圍均等之意味以及於範圍內之所有的變更。 產業上之可利用性 由於根據本發明之製造方法所製造的結晶性樹脂板平 坦性優異,故很適合作爲光擴散板,亦即構成直下式液晶 0 顯示器之裝置的背光裝置來使用。 【圖式簡單說明】 第1圖是採用於本發明之結晶性樹脂板的製造方法之 裝置的槪略斷面圖。 第2圖是顯示鄰接的搬運輥筒之間距的槪略斷面圖。 第3圖是顯示鄰接的搬運輥筒之垂直方向的位置關係 之圖。 # 第4圖是採用於實施例1之結晶性樹脂板的製造方法 之裝置的槪略斷面圖。 第5圖是採用於以往之結晶性樹脂板的製造方法之裝 置的槪略斷面圖。 第6圖是採用於具備有發熱器的以往之結晶性樹脂板 的製造方法之裝置的槪略斷面圖。 第7圖是採用於具備有彎翹賦予輥筒的以往之結晶性 樹脂板的製造方法之裝置的槪略斷面圖。 第8圖是採用於具備有3根彎翹賦予輥筒的以往之結 -39- 201026481 晶性樹脂板的製造方法之裝置的槪略斷面圖。 第9圖是採用於實施例4之結晶性樹脂板的製造方法 之裝置的槪略斷面圖。 第10圖(a)是顯示搬運輥筒與搬運被擠壓薄片之位 置關係之第一形態的槪略斷面圖,(b)是顯示搬運輥筒 與搬運被擠壓薄片之位置關係之第二形態的槪略斷面圖, (c)是顯示搬運輥筒與搬運被擠壓薄片之位置關係之第 三形態的槪略斷面圖,(d)是顯示搬運輥筒與搬運被擠 _ 壓薄片之位置關係之第四形態的槪略斷面圖。 第11圖是採用於比較例2之結晶性樹脂板的製造方 法之裝置的槪略斷面圖。 第12圖是顯示被施於轉印模型的V字凹溝之複印模 的斷面形狀之模式圖。 第13圖是被施於轉印模型的半圓凹溝之複印模的斷 面形狀之模式圖。 第14圖是柱透鏡之模式圖。 φ 第15圖是其爲被施於轉印模型的v字溝一曲面複合 形狀之凹溝的複印模之斷面形狀一例之模式圖。 第16圖是其爲V字溝—曲面複合形狀的凹溝之一部 分的斷面形狀一例之模式圖。 第17圖是被施於轉印模型的凹溝之複印模的斷面形 狀之另一例之模式圖。 【主要元件符號說明】 -40- 201026481 1 :模座 2 :擠壓薄片 3 :第一押壓輥筒 4 :第二押壓輥筒 5 :第三押壓輥筒 6 :搬運輥筒 7 :牽引輥筒 φ 8、9 :發熱器 10、20:彎翹賦予輥筒 -41 -According to the method of the present invention, it is known that the configuration of the conventional apparatus can be changed by changing the conveyance method to produce a crystalline resin sheet which is excellent in suppressing the flatness of the warp. The embodiments and examples of the present invention have been described above, and the combinations of the above-described respective embodiments and examples are also intended to be predetermined. The embodiments and examples disclosed herein are to be considered as illustrative and not restrictive in all points -38-201026481. The scope of the present invention is defined by the scope of the claims, and is intended to be inclusive of the scope of the claims. INDUSTRIAL APPLICABILITY Since the crystalline resin sheet produced by the production method of the present invention is excellent in flatness, it is suitably used as a light diffusing plate, that is, a backlight device constituting a device for a direct type liquid crystal display. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic cross-sectional view showing an apparatus used in a method for producing a crystalline resin sheet of the present invention. Fig. 2 is a schematic cross-sectional view showing the distance between adjacent conveying rollers. Fig. 3 is a view showing the positional relationship in the vertical direction of the adjacent conveyance rollers. #Fig. 4 is a schematic cross-sectional view showing an apparatus used in the method for producing a crystalline resin sheet of Example 1. Fig. 5 is a schematic cross-sectional view showing the apparatus used in the conventional method for producing a crystalline resin sheet. Fig. 6 is a schematic cross-sectional view showing an apparatus for manufacturing a conventional crystalline resin sheet having a heater. Fig. 7 is a schematic cross-sectional view showing an apparatus for manufacturing a conventional crystalline resin sheet having a bending imparting roller. Fig. 8 is a schematic cross-sectional view showing an apparatus for manufacturing a crystal resin sheet of a conventional junction-39-201026481 having three bending-imparting rolls. Fig. 9 is a schematic cross-sectional view showing the apparatus used in the method for producing a crystalline resin sheet of Example 4. Fig. 10(a) is a schematic cross-sectional view showing a first embodiment of a positional relationship between a conveyance roller and a conveyed pressed sheet, and Fig. 10(b) is a view showing a positional relationship between the conveyance roller and the conveyed pressed sheet. (c) is a schematic cross-sectional view showing a third embodiment of the positional relationship between the conveyance roller and the conveyed pressed sheet, and (d) is a view showing that the conveyance roller is conveyed and conveyed _ A schematic cross-sectional view of a fourth form of the positional relationship of the pressed sheets. Fig. 11 is a schematic cross-sectional view showing the apparatus used in the method for producing a crystalline resin sheet of Comparative Example 2. Fig. 12 is a schematic view showing the sectional shape of a copying mold applied to a V-shaped groove of a transfer mold. Fig. 13 is a schematic view showing the sectional shape of a copying mold applied to a semicircular groove of a transfer mold. Figure 14 is a schematic view of a cylindrical lens. Fig. 15 is a schematic view showing an example of a sectional shape of a copying mold which is applied to a groove of a v-shaped groove-curved surface of a transfer model. Fig. 16 is a schematic view showing an example of a sectional shape of a portion of a groove of a V-shaped groove-curved surface composite shape. Fig. 17 is a schematic view showing another example of the sectional shape of the copying mold applied to the groove of the transfer mold. [Description of main component symbols] -40- 201026481 1 : Mold base 2: extruded sheet 3: first pressing roller 4: second pressing roller 5: third pressing roller 6: conveying roller 7: Traction roller φ 8, 9 : heater 10, 20: bending to the roller -41 -