TW201235709A - Light reflecting body and planar light source device employing same - Google Patents

Light reflecting body and planar light source device employing same Download PDF

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Publication number
TW201235709A
TW201235709A TW100148113A TW100148113A TW201235709A TW 201235709 A TW201235709 A TW 201235709A TW 100148113 A TW100148113 A TW 100148113A TW 100148113 A TW100148113 A TW 100148113A TW 201235709 A TW201235709 A TW 201235709A
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Taiwan
Prior art keywords
paper
light
light reflector
resin film
polyolefin
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TW100148113A
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Chinese (zh)
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TWI541545B (en
Inventor
Takahiko Ueda
Yousuke Hiroi
Tomotsugu Takahashi
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Yupo Corp
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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
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/10—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of paper or cardboard
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/40—Properties of the layers or laminate having particular optical properties
    • B32B2307/416—Reflective
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/536—Hardness
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/732—Dimensional properties
    • B32B2307/734—Dimensional stability
    • 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
    • B32B2457/00—Electrical equipment
    • B32B2457/20—Displays, e.g. liquid crystal displays, plasma displays
    • 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
    • B32B2590/00—Signboards, advertising panels, road signs
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/08—Mirrors
    • G02B5/0808—Mirrors having a single reflecting layer
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133553—Reflecting elements

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Nonlinear Science (AREA)
  • Laminated Bodies (AREA)
  • Optical Elements Other Than Lenses (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Planar Illumination Modules (AREA)

Abstract

Provided is a light reflecting body wherein a reflecting layer formed of a polyolefin resin film is disposed on at least one face of a substrate layer formed of a paper material. The light reflecting body has a reflectivity in the reflecting layer surface of 95-105%, a taber stiffness of 0.4-100mNm, and a dimension change rate of -0.3 - 0.3% in ambient temperature changes of 20 degrees C - 70 degrees C. The light reflecting body is resistant to bending, may be rolled into rolls, and has superior dimensional stability even when used as an internally mounted light source member.

Description

201235709 六、發明說明： 【發明所屬之技術領域】 本發明係關於一種可用作面光源裝置所使用之反射板、 及各種照明裝置所使用之光反射用構件的光反射體、以及 使用該光反射體之面光源裝置。 【先前技術】 將光源配置於内部’自後方發光而提高視認性之背光型 之液晶顯示器或液晶電視、電飾招牌等已廣泛普及。背光 型之内置式光源中，邊緣照明方式之典型之構成係如圖丄 所示，包含光反射體11、對透明之丙浠酸系板12進行網點 印刷13而成之導光板14、擴散板15、以及光源16等構件。 以導光板傳導來自光源之光，以光反射體加以反射，以擴 散板形成均一面狀之光。近年來，伴隨液晶顯示器或液晶 電視等之大型化，謀求光源之高輸出化或光源燈數之增加 等改良。又，為提高亮度，亦存在如圖1般設置複數個光 源16之情形。 先前較多地於光反射體中使用對成為構造體之外罩之白 色塗裝、或白色聚酯膜（例如專利文獻υ。然而，使用白色 塗裝時無法期待利用反射光充分提高亮度，又，於使用白 色聚醋膜之光反射體之情形時，存在因近年來之光量增加 而導致光反射體之色調變化（黃變）成為問題之情況。 根據該背景而提出使用—種可利用反射光獲得充分之亮 度’且即便光量增加色調之變化亦較少的白色聚烯烴膜 (例如專利文獻2)。此種白色聚烯烴膜係如下者，即以聚烯 161006.doc 201235709 烴為主要原料，藉由延伸成形而於内部形成多個微細之空 隙’於各個空之界面進行光反射，藉此獲得充分之亮 度。然而，近年來於配合液晶電視等之大型化而將該白色 聚烯烴膜大型化時’存在因剛度(韌性)不足導致產生撓曲 而產生亮斑之情形。因&，提出加厚白色聚烯烴膜本身， 或者作為襯裏材料與其他具有剛性之樹脂膜貼合而提高剛 度（例如專利文獻3)，分別於某程度上取得成功。 然而’近年來’液晶電視等之畫質提高進一步推進，為 提高明部、暗部之對比度，I求更高亮度之内置式光源， 由先前之冷陰極管而使用高輸出之LED(Hght⑽丨⑴叫 diode，發光二極體）作為光源16的製品逐漸成為主流。隨 著此種光源之輸出《高，冑成内置式光源之構㈣露於更 加南溫下。 不限於聚烯烴或聚酯而藉由延伸所成形之白色膜因伴隨 上述液晶電視等之開關（on_〇ff)之溫度變化而發生尺寸變 化’尤其因面光源裝置内之熱而產生撓曲，故而認為難以 應用。 因此，存在為獲得相對於溫度變化之尺寸穩定性而對近 年來之白色聚酿膜進一步增加厚度來應對之傾向，實質加 厚近至300 μηι。然而，使用熔點低於聚酯之聚烯烴的白色 聚烯烴膜若僅增加厚度或者與其他具有剛性之樹脂膜貼 合，則存在熱尺寸穩定性不足而產生撓曲，產生亮斑之情 形。 另一方面，用作光反射體之白色聚烯烴膜通常以捲繞長 161006.doc 201235709 條之膜之輥狀進行供給，於裝配面光源裝置之步驟中裁切 為任意尺寸而使用。其原因在於：自輥狀之膜採取光反射 體時容易獲得符合各種製品之大小、形狀，且邊角材料損 失亦較少。 過去以提高作為光反射體之白色聚烯烴膜之剛度為課 通’亦提出有將該白色聚烯烴膜與金屬板貼合之情形（例 如專利文獻4)、或將白色聚烯烴膜與熱硬化型樹脂含浸紙 貼合之情形（例如專利文獻5)。然而，該等係以剛性賦予作 為應解決之課題’金屬板或熱硬化型樹脂含浸紙本身比重 非常高’且剛度過高’因此該等貼合體無法捲繞為輥狀而 限定於以單片（sheet)之供給，結果僅對行動電話等中使用 之兩面光反射體等製品尺寸較小之用途有效。因此，與金 屬板或熱硬化型樹脂含浸紙貼合之情形就難以產生撓曲之 剛性或伴隨溫度變化之尺寸穩定性之觀點而言較為有利， 但就如上所述作為大型化之液晶電視等之光反射體而自身 重量過大，且穩定供給之觀點而言不合適。 總括而言’近年來推進大型化、高精細化之液晶電視等 之内置式光源所使用的光反射體不僅需要藉由反射光獲得 充分亮度之光反射性能，而且需要即便存在機内溫度環境 變化尺寸穩定性仍較佳，且即便大型化亦不會因自身重量 發生變形而撓曲之較高剛性。然而，另一方面為利用挺供 給光反射體，亦要求該剛性低至能夠捲繞且使用時恢復至 平面之程度。 [先前技術文獻] 161006.doc 201235709 [專利文獻] [專利文獻1]日本專利特開平4_239540號公報 [專利文獻2]曰本專利特開2〇〇2·〇317〇4號公報 [專利文獻3]曰本專利特開2〇〇4_1〇999〇號公報 [專利文獻4]日本專利特開2〇〇4_16782〇號公報 [專利文獻5]日本專利特開2〇〇5 〇993 14號公報 【發明内容】 [發明所欲解決之問題] 因此，本發明之課題在於實現一種光反射體，其係使用 聚烯烴系樹脂膜作為反射層者，且使光反射體之構造具有 特徵而賦？適當之剛度以改善U，肖時亦能以親供給， 且即便用作内置式光源之構件時存在環境溫度變化尺寸穩 定性仍優異。又，本發明之課題在於提供一種使用該光反 射體之高亮度且亮斑較少之面光源裝置。 [解決問題之技術手段] 本發明係藉由以下手段解決課題者。 即，本發明係關於 [1] 種光反射體，其係於包含紙材之基材層之至少單面設 置有包含聚烯烴系樹脂膜之反射層者，且反射層表面之反 射率為95〜105%，泰伯剛度為〇·4〜1〇〇 mN.m，使環境溫度 自20C變化至70C時之尺寸變化率為_〇3〜〇3〇/〇。 [2] 上述紙材較佳為包含使植物纖維相互糾結而膠著者$ 重量以上者。 [3] 更具體而έ ，上述紙材較佳為包含選自由jis_ 161006.doc 201235709 P0001:1998中規定之象牙紙、銅版紙、印刷用紙、 OCR(Optical Character Recognition，光學字符識別）用 紙、套版印刷用紙（offset paper)、加工用紙、卡片用厚 紙、壁紙原紙、拋光塗料紙、牛皮紙、凹版印刷用紙、輕 量塗料紙、塗料紙、紙器用板紙、道林紙（w〇〇dfree paper)、白板紙、模造紙（semi-woodfree paper)、中質紙 (wood-containing paper)、塗佈印刷用紙、塗料紙原紙、阻 燃紙、鋇地紙、微塗佈印刷用紙、防水紙、牛奶盒用紙板 原紙所組成之群中任一種、或者樹脂塗料紙， 上述紙材較佳為不包含不織布、紗線、合成紙、樹脂 膜、熱硬化性樹脂含浸紙。 [4] 上述紙材之泰伯剛度較佳為〇」〜〗〇〇 mN.m， [5] 使環境溫度自2(TC變化至70°C時之尺寸變化率較佳 為-0.5〜0.3%， [6] 密度較佳為 〇.6~1.2 g/cm3， [7] 厚度較佳為70〜700 μιη。 [8] 上述聚烯烴系樹脂膜較佳為包含丙烯系樹脂者。 [9] 更具體而言’上述聚稀烴系樹脂膜較佳為包含平均粒徑 0.05〜1.5 μιη之無機填充料及平均分散粒徑心㈦〜丨5叫^之 有機填充料之至少一者5〜75重量％， [10] 較佳為朝至少單軸方向延伸， [Π]較佳為多層構造。 [12] 上述聚烯烴系樹脂膜之反射率較佳為％〜1 ， [13] 密度較佳為〇 5 g/cm3以上且未達〇 9 , 161006.doc 201235709 [14] 厚度較佳為30〜500 μηι。 [15] 本發明之光反射體可捲繞為輥狀進行處理。 又’本發明包含 Π6]使用如上述⑴至[15]中任—項之光反射體之面光源裝 置。 [發明之效果】 根據本發明之光反射體，即便用於近年來推進大型化、 高精細化之液晶電視等之内置式光源之情形時，亦可利用 適當之剛度改善撓曲，且即便存在環境溫度變化亦可利用 優異之尺寸穩定性改善亮斑。同時，本發明之光反射體亦 能以輥供給。又，使用本發明之光反射體之面光源裝置係 高亮度且亮斑較少，可應對大型化或高精細化者。 【實施方式】 以下，對本發明之光反射體之形態進行詳細說明。以下 記載之構成要件之說明有時基於本發明之代表性之實施態 樣而進行，但本發明並不限定於此種實施態樣。再者，本 發明中「〜」係指將其前後所記載之數值分別作為最小值 及最大值而包含之範圍。 [光反射體] 本發明之光反射體係於包含紙材之基材層之至少單面設 置有包含聚烯烴系樹脂膜之反射層者。 該光反射體之特徵在於：反射層表面之反射率為 95〜105%之範圍内，其泰伯剛度為〇·4〜1〇〇 mN.m之範圍 内’使環境溫度自20。(：變化至7〇。(：時之尺寸變化率 161006.doc 201235709 為-0.3~0·3°/。之範圍内。 於該光反射體之反射層表面之反射率未達95%之情形 時，存在使用其之面光源裝置之亮度變低的傾向。本構成 之光反射體難以獲得超過105%之反射率。 於該光反射體之泰伯剛度未達0.4 mN.m之情形時，存在 將其用於大型之面光源裝置時容易產生撓曲之傾向。反 之’若超過1 00 mN.m，則存在難以將其捲繞成輥狀之傾 向。 於使該光反射體之環境溫度自20°C變化至70°C時之尺寸 變化率為-0.3〜0.3°/。之範圍外之情形時，存在尺寸變化較 大而於面光源裝置之使用時容易產生撓曲之傾向。 該光反射體較佳為其反射層表面之反射率為96〜丨之 範圍内。又，較佳為其泰伯剛度為卜⑼mN.m之範圍内。 又，較佳為使環境溫度自20<t變化至70t時之尺寸變化率 為-0.2〜0.2%之範圍内。 [紙材] 紙材'係作為本發明之光反射體之基材層而賦予適當 度’且提高尺寸穩定性者 該紙材主要包含使植物纖維（一般為紙漿等）相互糾結而 膠著者(通常以重量比計占紙材之過半量，較佳為占5〇重 量％以上’更佳為占7()重量％以上，尤佳為占重量％以 上)’作為具體例，可列舉選自由JIS_p〇〇〇i糊中規定之 象牙紙、鋼版紙、印刷用紙、〇CR用紙、套版印刷用紙、 ^工用紙、卡片用厚紙、壁紙原紙、拋光塗料紙、牛皮 I61006.doc 201235709 紙、凹版印刷用紙、輕量塗料紙、塗料紙、紙器用板紙、 道林紙、白板紙、模造紙、中質紙、塗佈印刷用紙、塗料 及原紙、阻燃紙、鋇地紙、微塗佈印刷用紙、防水紙、牛 奶皿用紙板原紙所組成之群中任__種、或者樹脂塗料紙 等。 此種紙材可商業性獲取，作為具體例，例如可列舉王子 製紙公司製之「OK T〇PK〇TE」、「〇K L card」、「金 藤」、王子特殊紙公司製之「MarshmaU〇w」等。 本發明者等人過去以提高包含聚烯烴系樹脂膜之光反射 體之剛度為目的而研究了金屬板、織布、不織布 ' 紗線、 合成紙、樹脂膜、熱硬化性樹脂含浸紙等各種原材料作為 襯襄材料。 然而，襯裏材料使用織布、不織布、紗線、合成紙等者 雖可提高㈣裂性，但僅可於增加聚烯烴系樹脂膜本身之 厚度之程度上改善剛性’並不充分。此處所謂「合成 紙」’係指使包含含有填充材料之合成樹脂之膜延伸並於 内部形成許多孔隙而變白之樹脂延伸膜。 另一方面’襯裏材料使用金屬板或熱硬化性樹脂含浸紙 等者可對光反射體料極高之剛性，但另—方面由於剛性 過高故難以進行衝壓或賦形等加工，難以捲繞形成輥狀或 自形成輥狀者恢復至平面狀。又，由於該等比重較大，故 而存在若大型化則作為一構件重量亦增大之傾向。其結 果，該等在裝配面光源裝置之步驟中可加工性非常差，^ 對搭載於攜帶用機器上之小型液晶顯示裝置有效。 161006.doc 201235709 概裏材料使用較厚之PET(polyethylene terephthaiate，聚 對苯二甲酸乙二§旨）膜等樹脂膜者能夠提供—種可賦予適 度之剛度，即便於大型化時亦不會產生撓曲，且亦可捲繞 形成輥狀’後段之加工亦容易的光反射體。然而，作為近 年來推進高精細化之液晶電視等之内置式光源之構件，存 在隨著機内環境溫度之上升發生收縮或線膨脹而改變尺 寸，結果導致產生撓曲之情形，就對熱之尺寸穩定性之觀 點而言不充分。 因此本發明者等人對作為包含聚烯烴系樹脂膜之光反 射體之襯裏材料可賦予適度之剛度，且對熱之尺寸穩定性 優異者進行了摸索研究，結果想到使用紙材之情形。紙 材、尤其是使植物纖維相互糾結而膠著者對熱具有優異之 尺寸穩定性，例如於電子照像列印（通常為拷貝或雷射印 刷）等中，即便於碳粉熔融之溫度條件下紙材本身亦不會 變形，故所印刷之圖樣不會偏移。本發明者等人之此種構 思係具有申請人之事業形態後才獲得者。 作為構成本發明之光反射體之紙材而較佳者係使用由木 材、草、麥稈、竹等獲得之植物纖維並主要含有該等者， 更佳為該等之纖維長度相對較長者，更佳為使用將植物纖 維蒸解所獲得之化學紙漿者，更佳為利用紙力增強劑使該 等植物纖維相對高度地相互糾結膠著而造紙者，且為對該 等造紙者塗佈聚乙烯等樹脂之樹脂塗料紙。 如上所述，用作本發明之光反射體之基材層的該紙材係 有助於光反射體之剛度與尺寸穩定性者，因此其泰伯剛度 161006.doc 201235709 較佳為0.1〜100 mN.m之範圍内，更佳為0.5〜50 mN.m之範 圍内。若紙材之泰伯剛度為0.1 mN.m以上，則存在光反射 體之泰伯剛度容易達到0.4 mN.m以上，亦難以產生撓曲之 傾向。又，若為100 mN.m以下，則存在容易將光反射體捲 繞形成輥狀之傾向。 又’使環境溫度自20°C變化至7〇t：時之該紙材之尺寸變 化率較佳為-0.5〜0.3%之範圍内，更佳為_〇4〜±〇%之範圍 内。若紙材之尺寸變化率為-0.5〜〇.3%之範圍内，則存在 容易將與聚烯烴系樹脂膜組合而成之光反射體之尺寸變化 率調整為-0.3〜0.3%之範圍内的傾向。 又用作本發明之光反射體之基材層的該紙材之密度較 佳為0.6〜1_2 g/em3之範圍内，更佳為〇 7〜i」g/em3之範圍 内。若紙材之密度為0.6 g/em3以上，則存在容易確保紙材 之剛度之傾向。又’若為_3以下’則存在光反射體 之重量不會過重而容易處理之傾向。 又，該紙材之厚度較佳為70〜7〇〇 μπι之範圍内，更佳為 1〇0〜_㈣之範圍内。若紙材之厚度為70㈣以上，則存 在容易充分確保紙材之剛度之傾向。又，若為7〇〇㈣以 下，則存在光反射體之重量不會過重，且剛度亦適度而容 易處理之傾向。 [聚烯烴系樹脂膜] 聚烯烴㈣賴係作為本發明之光反㈣之反射層而賦 予光反射性能’實現面光源裝置之高亮度者。[Technical Field] The present invention relates to a light reflector which can be used as a reflector for a surface light source device and a light reflection member used in various illumination devices, and the use of the light A surface light source device for a reflector. [Prior Art] A backlight type liquid crystal display, a liquid crystal television, an electric signboard, etc., which emit light sources from the rear to improve visibility, have been widely used. In the back-illuminated built-in light source, a typical structure of the edge illumination method is as shown in FIG. 2, and includes a light reflector 11 and a light guide plate 14 for diffusing the transparent propionic acid plate 12 and a diffusion plate. 15, and the light source 16 and other components. The light from the light source is conducted by the light guide plate, and is reflected by the light reflector to expand the plate to form a uniform light. In recent years, with the increase in the size of liquid crystal displays, liquid crystal televisions, etc., improvements in the output of light sources and the increase in the number of light sources have been sought. Further, in order to increase the brightness, there are cases where a plurality of light sources 16 are provided as shown in Fig. 1. In the past, a white coating or a white polyester film which is a cover for a structure has been used for a large amount of light (for example, the patent document υ. However, when white coating is used, it is not expected to sufficiently increase the brightness by using the reflected light. In the case of using a light reflector of a white polyester film, there is a problem that the color tone change (yellowing) of the light reflector becomes a problem due to an increase in the amount of light in recent years. According to the background, it is proposed to use the reflected light. A white polyolefin film having a sufficient brightness 'and a small change in color tone even if the amount of light is increased (for example, Patent Document 2). Such a white polyolefin film is mainly composed of a polyolefin of 16106.doc 201235709 as a main raw material. A plurality of fine voids are formed in the inside by extension molding, and light is reflected at the interface of each of the spaces to obtain sufficient brightness. However, in recent years, the white polyolefin film is large in accordance with the increase in size of the liquid crystal television or the like. At the time of chemicalization, there is a case where a sharp spot is generated due to insufficient rigidity (toughness). Due to &, a thick white polyolefin film itself is proposed, or The lining material is bonded to other rigid resin films to improve the rigidity (for example, Patent Document 3), and has succeeded to some extent. However, in recent years, the image quality of LCD TVs has been further improved, in order to improve the Ming dynasty, The contrast of the dark part, I want a higher brightness built-in light source, and the high-output LED (Hght (10) 丨 (1) called diode, light-emitting diode) as the light source 16 from the previous cold cathode tube has gradually become the mainstream. The output of the light source is high, and the structure of the built-in light source (4) is exposed to a more southerly temperature. The white film formed by stretching is not limited to polyolefin or polyester because of the switch accompanying the above-mentioned liquid crystal television (on_〇) Ff) The temperature change occurs and the dimensional change 'is particularly caused by the heat in the surface light source device, so it is considered to be difficult to apply. Therefore, there is a white polystyrene film for recent years in order to obtain dimensional stability with respect to temperature change. Further increase the thickness to cope with the tendency to increase the thickness to as much as 300 μηι. However, if the white polyolefin film having a melting point lower than that of the polyolefin is used, only the thickness is increased. Degree or bonding with other rigid resin film, there is a case where the thermal dimensional stability is insufficient to cause deflection and bright spots are generated. On the other hand, the white polyolefin film used as the light reflector is usually wound length 161006. .doc 201235709 The film is supplied in the form of a roll, which is cut into any size in the step of assembling the surface light source device. The reason is that it is easy to obtain the size of various products when the film is taken from the roll-shaped film. The shape and the loss of the corner material are also small. In the past, in order to improve the rigidity of the white polyolefin film as the light reflector, it is proposed that the white polyolefin film is bonded to the metal plate (for example, Patent Document 4) Or a case where a white polyolefin film is bonded to a thermosetting resin impregnated paper (for example, Patent Document 5). However, these are given as a problem to be solved by the rigidity of the metal sheet or the thermosetting resin impregnated paper itself. The specific gravity is very high and the rigidity is too high. Therefore, the bonded bodies cannot be wound into a roll shape and are limited to being supplied in a single sheet. As a result, only two of the mobile phones and the like are used. It is effective for applications such as surface reflectors having a small size. Therefore, it is advantageous in that it is difficult to cause rigidity of deflection or dimensional stability with temperature change in the case of bonding to a metal plate or a thermosetting resin impregnated paper, but as a large-sized liquid crystal television as described above, The light reflector is not suitable in terms of its own weight and stable supply. In summary, the light reflector used in the built-in light source such as a large-sized, high-definition LCD TV in recent years requires not only light reflection performance of sufficient brightness by reflected light, but also the need to change the size of the internal temperature environment. The stability is still good, and even if it is enlarged, it will not be deformed by its own weight and will be flexed with higher rigidity. However, on the other hand, in order to utilize the supply of the light reflector, the rigidity is also required to be low enough to be wound up and to return to the plane when in use. [Patent Document 1] Japanese Laid-Open Patent Publication No. Hei. No. Hei. No. Hei. No. Hei. No. Hei. [Patent Document 4] Japanese Patent Laid-Open Publication No. Hei 2 No. Hei. No. Hei. No. Hei. DISCLOSURE OF THE INVENTION PROBLEM TO BE SOLVED BY THE INVENTION Therefore, an object of the present invention is to realize a light reflector which uses a polyolefin resin film as a reflective layer and which has a structure and a characteristic of a light reflector. Appropriate rigidity is used to improve U, and it can also be supplied by the parent, and even if it is used as a member of the built-in light source, the dimensional stability of the ambient temperature is excellent. Further, an object of the present invention is to provide a surface light source device which uses the light reflector and has high brightness and a small number of bright spots. [Technical means for solving the problem] The present invention solves the problem by the following means. That is, the present invention relates to the light reflector of [1], which is provided on at least one surface of a base material layer containing a paper material, and a reflective layer comprising a polyolefin resin film, and a reflectance of a surface of the reflective layer is 95. ~105%, the Taber stiffness is 〇·4~1〇〇mN.m, and the dimensional change rate when the ambient temperature changes from 20C to 70C is _〇3~〇3〇/〇. [2] The above-mentioned paper material preferably contains those in which the plant fibers are entangled with each other and the rubberizer is more than $weight. [3] More specifically, the paper material preferably comprises an ivory paper, a coated paper, a printing paper, an OCR (Optical Character Recognition) paper, and a sleeve selected from jis_ 161006.doc 201235709 P0001:1998. Offset paper, processing paper, thick paper for cards, wallpaper base paper, polished coated paper, kraft paper, gravure paper, lightweight coated paper, coated paper, paperboard paper, w〇〇dfree paper , white paper, semi-wood free paper, wood-containing paper, coated printing paper, coated paper base paper, flame retardant paper, crepe paper, micro coated printing paper, waterproof paper, milk Any one of the group consisting of cardboard base paper or resin coated paper, and the paper material preferably does not contain a nonwoven fabric, a yarn, a synthetic paper, a resin film, or a thermosetting resin impregnated paper. [4] The Taber stiffness of the above paper is preferably 〇"~〗 〇〇mN.m, [5] The ambient temperature is changed from 2 (TC to 70 °C, the dimensional change rate is preferably -0.5~0.3) %, [6] The density is preferably 〇6 to 1.2 g/cm3, and the thickness of [7] is preferably 70 to 700 μηη. [8] The polyolefin resin film preferably contains a propylene resin. More specifically, the above-mentioned polyolefin resin film preferably contains at least one of an inorganic filler having an average particle diameter of 0.05 to 1.5 μm and an organic filler having an average dispersed particle diameter (seven) of 丨5 ^5. The weight %, [10] preferably extends in at least a uniaxial direction, and [Π] is preferably a multilayer structure. [12] The polyolefin resin film preferably has a reflectance of % to 1, [13] The thickness of the light reflector is preferably 5 to 500 μm. The invention provides a surface light source device using the light reflector of any of the above (1) to [15]. [Effects of the Invention] The light reflector according to the present invention is used even in recent years. In the case of a built-in light source such as a high-definition liquid crystal television, it is also possible to improve the deflection by using an appropriate rigidity, and to improve the bright spot by using excellent dimensional stability even in the presence of an environmental temperature change. The light-reflecting body can also be supplied by a roller. Moreover, the surface light source device using the light reflector of the present invention has high brightness and few bright spots, and can cope with an increase in size or high definition. The form of the light reflector will be described in detail. The description of the constituent elements described below may be performed based on a representative embodiment of the present invention, but the present invention is not limited to such an embodiment. The term "~" refers to a range including the numerical values described before and after the minimum value and the maximum value. [Light Reflecting Body] The light reflecting system of the present invention is provided on at least one side of the base material layer including the paper material. A reflective layer comprising a polyolefin resin film. The light reflector is characterized in that the reflectance of the surface of the reflective layer is in the range of 95 to 105%, and the Taber stiffness is 〇·4~1〇〇 m. Within the range of Nm, the ambient temperature is changed from 20. (:: to 7〇. (: The dimensional change rate is 161006.doc 201235709 is -0.3~0·3°/.). The reflection of the light reflector When the reflectance of the surface of the layer is less than 95%, the brightness of the surface light source device using the same tends to be low. It is difficult to obtain a reflectance of more than 105% for the light reflector of the present configuration. When the rigidity is less than 0.4 mN.m, there is a tendency that it is likely to be deflected when it is used for a large-surface light source device. If the reverse is more than 100 mN.m, there is a tendency that it is difficult to wind it into a roll shape. The dimensional change rate when the ambient temperature of the light reflector is changed from 20 ° C to 70 ° C is -0.3 to 0.3 ° /. In the case of the outside of the range, there is a tendency that the dimensional change is large and the deflection is likely to occur when the surface light source device is used. Preferably, the light reflector has a reflectance of 96 to 反射 in the surface of the reflective layer. Further, it is preferable that the Taber stiffness is in the range of (9) mN.m. Further, it is preferable that the dimensional change rate when the ambient temperature is changed from 20 < t to 70 t is in the range of -0.2 to 0.2%. [Paper material] The paper material is used as the base material layer of the light reflector of the present invention to impart appropriateness' and the dimensional stability is improved. The paper material mainly comprises a planter (generally pulp, etc.) entangled with each other and a gluer ( Usually, it accounts for more than half of the paper by weight ratio, preferably 5% by weight or more, more preferably 7 (% by weight or more, and particularly preferably % by weight or more), and as a specific example, it may be selected from JIS_p〇〇〇i paste ivory paper, steel plate paper, printing paper, 〇CR paper, plate printing paper, ^ industrial paper, card thick paper, wallpaper base paper, polished coated paper, leather I61006.doc 201235709 paper, Gravure printing paper, lightweight coated paper, coated paper, paperboard for paperboard, Daolin paper, whiteboard paper, mold paper, medium paper, coated printing paper, paint and base paper, flame retardant paper, crepe paper, micro coating Any of a group of printing paper, waterproof paper, and cardboard base paper for milkware, or resin coated paper. Such a paper is commercially available, and as a specific example, "OK T〇 PK〇TE", "〇KL card", "Golden Rattan", and "Marshma U〇w" manufactured by Oji Paper Co., Ltd., manufactured by Oji Paper Co., Ltd. "Wait. The inventors of the present invention have studied various types of metal sheets, woven fabrics, nonwoven fabrics, synthetic papers, resin films, and thermosetting resin impregnated papers for the purpose of improving the rigidity of the light-reflecting body including the polyolefin-based resin film. Raw materials are used as lining materials. However, the use of a woven fabric, a non-woven fabric, a yarn, a synthetic paper or the like for the lining material can improve the cracking property, but the rigidity can be improved only to the extent that the thickness of the polyolefin-based resin film itself is increased. The term "synthetic paper" as used herein refers to a resin stretched film which is formed by stretching a film containing a synthetic resin containing a filler and forming a plurality of pores therein to whiten. On the other hand, the use of a metal plate or a thermosetting resin impregnated paper for the lining material can provide extremely high rigidity to the light-reflecting material. However, since the rigidity is too high, it is difficult to perform processing such as pressing or forming, and it is difficult to wind. It is restored to a flat shape when it is formed into a roll shape or is formed into a roll shape. Further, since the specific gravity is large, the weight of one member tends to increase as the size increases. As a result, the workability in the step of assembling the surface light source device is extremely poor, and it is effective for a small liquid crystal display device mounted on a portable device. 161006.doc 201235709 The material used in the thicker PET (polyethylene terephthaiate, polyethylene terephthalate) film can provide moderate stiffness, even when it is large. It is also possible to bend and form a light reflector which is easy to process in the form of a roll-shaped rear section. However, as a member of a built-in light source that promotes a high-definition liquid crystal television or the like in recent years, there is a case where the size is changed as the internal temperature of the machine rises due to shrinkage or linear expansion, and as a result, a deflection occurs, and the size of the heat is applied. It is not sufficient from the viewpoint of stability. Therefore, the inventors of the present invention have conducted a research on the lining material which is a light-reflecting body containing a polyolefin-based resin film, and have made excellent research on the dimensional stability of heat. Paper, especially for entanglement of plant fibers, and the adhesive has excellent dimensional stability to heat, such as in electrophotographic printing (usually for copying or laser printing), even at temperatures under which the toner melts. The paper itself will not be deformed, so the printed pattern will not shift. Such a concept of the present inventors and the like is obtained after having the applicant's business form. As the paper material constituting the light reflector of the present invention, it is preferred to use plant fibers obtained from wood, grass, wheat straw, bamboo, etc., and mainly include those, and it is more preferable that the fiber lengths are relatively long. More preferably, the use of chemical pulp obtained by digesting plant fibers, more preferably using paper strength enhancers to make the plant fibers relatively highly entangled with each other, and papermakers, and coating the papermakers with polyethylene, etc. Resin resin coated paper. As described above, the paper material used as the substrate layer of the light reflector of the present invention contributes to the rigidity and dimensional stability of the light reflector, and therefore its Taber stiffness 16106.doc 201235709 is preferably 0.1 to 100. Within the range of mN.m, more preferably in the range of 0.5 to 50 mN.m. If the Taber stiffness of the paper is 0.1 mN.m or more, the Taber stiffness of the light reflector tends to be 0.4 mN.m or more, and it is difficult to cause deflection. Moreover, when it is 100 mN.m or less, there is a tendency that the light reflector is easily wound into a roll shape. Further, the change in the dimensional change of the paper when the ambient temperature is changed from 20 ° C to 7 〇 t is preferably in the range of -0.5 to 0.3%, more preferably in the range of _ 〇 4 to ± 〇 %. When the dimensional change rate of the paper material is in the range of -0.5 to 3%, the dimensional change rate of the light reflector which is combined with the polyolefin resin film is easily adjusted to be in the range of -0.3 to 0.3%. Propensity. Further, the density of the paper material used as the substrate layer of the light reflector of the present invention is preferably in the range of 0.6 to 1 - 2 g/cm 3 , more preferably in the range of 〜 7 to i" g / em 3 . If the density of the paper material is 0.6 g/cm3 or more, there is a tendency that the rigidity of the paper material is easily secured. Further, if it is _3 or less, the weight of the light reflector tends to be too heavy and easy to handle. Further, the thickness of the paper material is preferably in the range of 70 to 7 〇〇 μπι, more preferably in the range of 1 〇 0 to _ (4). If the thickness of the paper material is 70 (four) or more, there is a tendency that the rigidity of the paper material can be sufficiently ensured. Further, if it is 7 inches or less, the weight of the light reflector is not excessively heavy, and the rigidity is moderate and easy to handle. [Polyolefin-based resin film] The polyolefin (4) is used as the light-reflecting layer of the light-reflecting layer (4) of the present invention to impart light-reflecting performance.

作為該聚烯烴系樹脂膜，I 曰联較佳為包含丙烯系樹脂者， 161006.docAs the polyolefin-based resin film, it is preferred that the I-link is a propylene-based resin, 161006.doc

S •12· 201235709 又’較佳為包含平均粒徑〇·〇5〜1.5 μιη之無機填充料及平均 分散粒徑0.05Μ.5 μπι之有機填充料之至少一者5〜75重量 % ’又’較佳為朝至少單軸方向延伸，其反射率較佳為 95〜105% 〇 (t稀經系樹脂） 該聚烯烴系樹脂膜中可使用之聚烯烴系樹脂之種類並 ' . #*Λ 特別限制。作為聚烯烴系樹脂，可列舉：高密度聚乙婦、 中密度聚乙烯、低密度聚乙烯等乙烯系樹脂、丙稀系樹 脂、聚曱基-1-戊烯、乙烯-環狀烯烴共聚物等聚烯烴系樹 月曰。該4亦可混合2種以上使用。該等之中，就因光源光 導致之色調變化（黃變）較少，且耐化學品性或生產成本優 異等之觀點而言，較佳為使用丙烯系樹脂。 作為該丙烯系樹脂，可使用丙烯均聚物、或作為主要成 分之丙烯與乙烯、丁烯、1-己烯、1-庚烯，4-曱基-丨_戊 烯等α-烯烴之共聚物。 該丙烯系樹脂之立體規則性並無特別限制，可使用顯示 等規或間規及各種程度之立體規則性者。又，於該丙烯系 樹脂為共聚物之情形時，可為2元系、3元系、4元系， 又，可為無規共聚物，亦可為嵌段共聚物。 此種聚烯烴系樹脂較佳為於聚烯烴系樹脂膜中以25〜95 重量％使用，更佳為以30〜9〇重量％使用。若聚烯烴系樹脂 膜中之聚烯烴系樹脂之含量為25重量％以上，則存在容易 與基材層一併提高剛性，且於下述延伸成形時難以斷裂之 傾向。又’若為95重量％以下，則存在於下述延伸成形時 161006.doc -13- 201235709 容易獲得充分之孔隙數，容易實現較高反射率之傾向。 尤其於本發明中，較佳為主要使用上述丙烯系樹脂作為 聚烯烴系樹脂。具體而言，較佳為使丙烯系樹脂以5〇〜1〇〇 重量％之比例含於聚烯烴系樹脂中’更佳為以7〇〜95重量％ 之比例含有。 (填充料） 於該聚烯烴系樹脂膜中，主要出於形成孔隙之目的，較 佳為與聚烯烴系樹脂一併含有填充料。作為該填充料，可 列舉各種無機填充料或有機填充料。 作為該無機填充料，可例示：重碳酸鈣、沈澱性碳酸 鈣、煅燒黏土、滑石、氧化鈦、硫酸鋇、硫酸鋁、二氧化 石夕、氧化鋅、氧化鎮、石夕藻土等。又，亦可例示使用各種 表面處理劑對上述無機填充料實施表面處理之表面處理 品。其中若使用重碳酸鈣、沈澱性碳酸鈣、黏土、矽藻 土、及該等之表面處理品，則價格低廉且延伸時之孔隙形 成性良好故而較佳。尤佳為重碳酸鈣、沈澱性碳酸鈣之表 面處理品。 作為表面處理劑，例如較佳為樹脂酸、脂肪酸'有機 馱、硫酸酯型陰離子界面活性劑、磺酸型陰離子界面活性 劑、石油樹脂酸、該等酸之鈉、鉀、銨等鹽、或者該等之 月θ肪馱6曰、樹脂酸酯、蠟、石蠟等，亦較佳為非離子系界 面活性劑、二烯系聚合物、鈦酸酯系偶合劑、矽烷系偶合 劑、鱗酸系、偶合劑等。作為上述硫酸酯型陰離子界面活性 d，例如可列舉長鏈醇硫酸酯、聚氧乙烯烷基醚硫酸酯、 161006.docS • 12· 201235709 Further, it is preferably an inorganic filler containing an average particle diameter of 〜·〇5 to 1.5 μηη and at least one of an organic filler having an average particle diameter of 0.05 Μ.5 μπι 5 to 75 wt% It is preferable to extend in at least a uniaxial direction, and the reflectance thereof is preferably 95 to 105% 〇 (t thin resin) The type of polyolefin resin which can be used in the polyolefin resin film and '. #*Λ Special restrictions. Examples of the polyolefin-based resin include ethylene resins such as high-density polyethylene, medium-density polyethylene, and low-density polyethylene, acryl-based resins, polydecyl-1-pentene, and ethylene-cyclic olefin copolymers. Polyolefin tree sap. These 4 may be used in combination of 2 or more types. Among these, it is preferred to use a propylene-based resin from the viewpoint of less change in color tone (yellowing) due to light source light, and excellent chemical resistance or production cost. As the propylene-based resin, a copolymer of propylene homopolymer or propylene as a main component and an α-olefin such as ethylene, butene, 1-hexene, 1-heptene or 4-mercapto-non-pentene can be used. Things. The stereoregularity of the propylene-based resin is not particularly limited, and those which exhibit an isotactic or syndiotactic and various degrees of stereoregularity can be used. Further, when the propylene resin is a copolymer, it may be a ternary system, a ternary system or a quaternary system, or may be a random copolymer or a block copolymer. The polyolefin-based resin is preferably used in an amount of 25 to 95% by weight, more preferably 30 to 9% by weight, based on the polyolefin-based resin film. When the content of the polyolefin-based resin in the polyolefin-based resin film is 25% by weight or more, the rigidity tends to be increased together with the base material layer, and it tends to be difficult to be broken during the stretching and molding described below. Further, when it is 95% by weight or less, it is present in the following stretching molding. 161006.doc -13 - 201235709 It is easy to obtain a sufficient number of pores, and it is easy to achieve a high reflectance. In particular, in the present invention, it is preferred to use the above propylene resin mainly as a polyolefin resin. Specifically, the propylene resin is preferably contained in the polyolefin resin in a ratio of 5 Å to 1% by weight, and more preferably in a ratio of 7 Å to 95% by weight. (Filler) In the polyolefin-based resin film, it is preferable to contain a filler together with the polyolefin-based resin mainly for the purpose of forming pores. As the filler, various inorganic fillers or organic fillers can be cited. The inorganic filler may, for example, be calcium bicarbonate, precipitated calcium carbonate, calcined clay, talc, titanium oxide, barium sulfate, aluminum sulfate, cerium oxide, zinc oxide, oxidized town or shixia. Further, a surface treatment product in which the above inorganic filler is subjected to surface treatment using various surface treatment agents can also be exemplified. Among them, the use of calcium carbonate, precipitated calcium carbonate, clay, diatomaceous earth, and the like, is preferred because it is inexpensive and has good pore formability upon extension. It is especially preferred as a surface treatment product of calcium carbonate and precipitated calcium carbonate. As the surface treatment agent, for example, a resin acid, a fatty acid 'organic hydrazine, a sulfate type anionic surfactant, a sulfonic acid type anionic surfactant, a petroleum resin acid, a salt such as sodium, potassium or ammonium of the acid, or preferably Such a ruthenium 驮6驮, a resin acid ester, a wax, a paraffin wax, etc., are also preferably a nonionic surfactant, a diene polymer, a titanate coupling agent, a decane coupling agent, or squaric acid. System, coupling agent, etc. Examples of the sulfate-type anionic interfacial activity d include long-chain alcohol sulfate, polyoxyethylene alkyl ether sulfate, and 161006.doc.

S -14- 201235709 ’ILs夂化油等或者該等之鈉、鉀等鹽，作為磺酸型陰離子界 面活㈣1例如可料⑥料酸、烧萘續酸、鏈烧罐酸、 α·稀煙續酸、烧基續基—等或者該等之納、卸等鹽。 =，作為上述脂肪酸，例如可列舉己酸、辛酸、壬酸、癸 -夂十酸$桂酸、肉豆缝酸、掠搁酸、硬脂酸、二十 二碳酸'油酸、亞麻油酸、次亞麻油酸'桐酸等。作為上 述有機酸，例如可列舉順丁稀二酸、山⑽等。作為上述 二烯系聚合物，例如可列舉聚丁二烯、異戊二烯等。作為 上述非離子系界面活性劑，可列舉聚乙二醇醋型界面活性 劑等。該等表面處理劑可使用1種或者組合2種以上使用。 作為使用該等表面處理劑之無機填充料之表面處理方法， 例如可使用日本專利特開平5_43815號公報、曰本專利特 開平5-139728號公報、日本專利特開平7_3〇〇568號公報、 曰本專利特開平1〇-176079號公報、曰本專利特開平 11-256144號公報、日本專利特開平號公報、曰 本專利特開2001-158863號公報、曰本專利特開2〇〇2_ 220547號公報、日本專利特開2002-363443號公報等記載 之方法。 作為該有機填充料，可較佳地使用具有高於本發明中使 用之聚稀烛系樹脂之熔點或玻璃轉移點的熔點或玻璃轉移 點（例如120~300°C )者。例如作為有機填充料’可例示·· 聚對苯二甲酸乙二酯、聚對苯二甲酸丁二酯、聚蔡二甲酸 乙二酯、聚醯胺、聚碳酸酯、聚苯乙烯、三聚氰胺樹脂、 環狀烯烴均聚物、環狀烯烴與乙烯之共聚物、聚乙稀硫 161006.doc 15 201235709 、聚苯硫喊、丙婦酸系樹脂（交 ’就形成孔隙之觀點而言，較 樹脂使用非相溶性之有機填充 喊、聚醯亞胺'聚乙醚嗣 聯丙烯酸系珠粒）等。其中 佳為對所使用之聚稀烴系 料。 於該聚稀㈣樹脂膜中，可自無機填充料或者有機填充 料中選擇1種草獨使用，亦可選擇2種以上組合使用。於組 。2種以上使用之情形時，亦可混合有機填充料與無機填 充料使用。 本發月中可使用之無機填充料之平均粒徑例如可藉由利 用雷射繞射式粒子測量裝置「MW」（日機裝股份有 限公司製’商品名）測定之累積5G%時之粒徑（累積50。/❶粒 徑）之測定（MiCrotrac法）、或者利用掃描式電子顯微鏡之一 次粒徑之觀察（例如將⑽個粒子之平均值設為平均粒㈣、 或者自比表面積之換算（例如使用島津製作所股份有限公 司製之粉體比表面積測定裝置ss_1〇〇測定比表面積並進行 換算）等求出。本發明令使用電子顯微鏡觀察及⑷⑽咖 法。 本發明中可使用之有機填充料之平均分散粒徑例如使用 如下方法求出，即利用掃描式電子顯微鏡，對藉由炼融混 練使有機填充料分散於聚烯煙系樹脂中之狀態下的該樹脂 膜剖面觀察至少H)個分散粒子’作為該粒徑（長徑）之平均 值求出。 、為調整藉由下述聚烯烴系樹脂膜之延伸成形而產生之孔 隙尺寸，對該聚烯烴系樹脂膜添加之上述無機填充料之平 161006.docS -14- 201235709 'ILs deuterated oil or the like, such as sodium, potassium and other salts, as a sulfonic acid type anion interface activity (4) 1 for example, 6 acid, burnt naphtha, chain cans acid, α · flue Continued acid, burnt base - etc. or such salt, unloading and other salts. =, as the above-mentioned fatty acid, for example, hexanoic acid, octanoic acid, citric acid, decyl-decanoic acid, lauric acid, myristic acid, grazing acid, stearic acid, docosalic acid, oleic acid, linoleic acid , linoleic acid 'tonic acid and so on. Examples of the organic acid include cis-butyl diacid, mountain (10), and the like. Examples of the above diene polymer include polybutadiene and isoprene. The nonionic surfactant may, for example, be a polyethylene glycol vinegar type surfactant. These surface treatment agents can be used alone or in combination of two or more. As a surface treatment method of the inorganic filler using the surface treatment agent, for example, Japanese Patent Laid-Open Publication No. Hei-5-43815, Japanese Patent Laid-Open Publication No. Hei No. Hei No. Hei No. Hei. Japanese Laid-Open Patent Publication No. Hei. No. Hei. No. Hei. No. Hei. No. Hei. No. Hei. No. Hei. No. Hei. No. Hei. No. Hei. No. Hei. The method described in Japanese Laid-Open Patent Publication No. 2002-363443, and the like. As the organic filler, those having a melting point or a glass transition point (e.g., 120 to 300 ° C) higher than the melting point or glass transition point of the poly-sand candle resin used in the present invention can be preferably used. For example, as an organic filler, 'polyethylene terephthalate, polybutylene terephthalate, polydiethylene terephthalate, polyamine, polycarbonate, polystyrene, melamine resin can be exemplified. , a cyclic olefin homopolymer, a copolymer of a cyclic olefin and ethylene, a polyethylene sulphur 16106.doc 15 201235709 , a polyphenyl sulfonate, a propylene glycol resin (in terms of pore formation, compared with a resin) An incompatible organic filler is used, and the polyamidene 'polyether-linked acrylic beads are used. Among them, the best is the polyhydrocarbon system used. In the poly (four) resin film, one type of grass may be selected from the inorganic filler or the organic filler, or two or more types may be used in combination. In the group. When two or more types are used, an organic filler and an inorganic filler may be mixed. The average particle diameter of the inorganic filler which can be used in the present month can be, for example, measured by the laser diffraction type particle measuring device "MW" (trade name of Nikkiso Co., Ltd.) Measurement of the diameter (accumulated 50%/❶ particle size) (MiCrotrac method) or observation of the primary particle diameter by a scanning electron microscope (for example, the average value of (10) particles is average particle (four), or conversion from specific surface area (For example, using a powder specific surface area measuring device ss_1〇〇 manufactured by Shimadzu Corporation, ss_1〇〇, and measuring the specific surface area), etc. The present invention is observed by an electron microscope and (4) (10) coffee method. Organic filling which can be used in the present invention The average dispersed particle diameter of the material is determined, for example, by using a scanning electron microscope to observe at least H) the cross section of the resin film in a state in which the organic filler is dispersed in the polyolefin resin by kneading and kneading. The number of dispersed particles 'is determined as the average of the particle diameters (long diameters). In order to adjust the pore size which is produced by the extension molding of the polyolefin resin film described below, the above-mentioned inorganic filler is added to the polyolefin resin film.

S •16- 201235709 均粒徑或上述有機填充料之平均分散粒徑分別較佳為 之範圍内，分別更佳為〇㈠叩之範圍内。 若使用平均粒徑或平均分散粒徑為〇 〇5 以上之填充 料，則存在容易獲得所期望之孔隙而使用本發明之光反射 體之面光源裝置之亮度變高的傾向…若使用平均粒徑 或平均分散粒徑為i.5 μΓη以下之填充料，則存在孔隙尺寸 更加均一而容易獲得高反射率之傾向。 為調整藉由下述聚烯烴系樹脂膜之延伸成形而產生之孔 隙置，對言亥聚稀烴系樹脂膜添加之上述填充料之調配量較 佳為5〜75重量％之範圍内，更佳為10〜70重量％之範圍内。 例如填充料之調配量可設為15〜5〇重量％，且可設為18〜42 重量％。 若填充料之調配量為5重量％以上，則存在容易獲得充 分之孔隙數之傾向，且存在使用本發明之光反射體之面光 源裝置之亮度變高的傾向。又，若填充料之調配量為Μ重 量％以下，則存在容易獲得充分之聚烯烴系樹脂膜之強 度’且於其延伸成形時容易防止斷裂之傾向。 (其他成分） 於構成聚烯烴系樹脂膜之主要之聚烯烴系樹脂為丙烯系 树脂之情形時，為改良延伸性，亦可調配聚乙烯、乙烯一 乙酸乙烯酯等熔點低於丙烯系樹脂之樹脂3~25重量％。 於聚烯烴系樹脂膜中，較佳為根據需要於不脫離本發明 之主旨之範圍内調配螢光增白劑、熱穩定劑、抗氧化劑、 %外線穩定劑（光穩定劑）、紫外線吸收劑、染料、顏料、 161006.doc 17 201235709 抗靜電劑、分散劑、潤滑劑、抗結塊劑、阻燃劑、塑化 劑、結晶成核劑等各種公知之添加劑。 作為熱穩定劑’可調配位阻酚系或磷系、胺系等穩定劑 0.001〜1重量％ ’作為紫外線穩定劑（光穩定劑），可調配位 阻胺系或笨并三唑系、二苯曱酮系等穩定劑〇.〇“〜！重量 % ’作為無機填充料之分散劑，可調配矽烷偶合劑、油酸 或硬脂酸等高級脂肪酸、金屬皂、聚丙烯酸、聚甲基丙稀 酸或者該等之鹽等0.01〜4重量％。 [聚烯烴系樹脂膜之製造方法] 通常樹脂延伸膜可藉由如下方式獲得，即，使用擠出機 對其樹脂組合物進行熔融混練，自擠出機呈片狀擠出熔融 物，將該熔融物於冷卻輥上冷卻固化而獲得樹脂片材之 後，將其延伸而獲得。就形成孔隙或獲得均—厚度之目的 而舌，本發明中使用之聚烯烴系樹脂膜較佳為包含朝至少 單轴方向延伸之樹脂延伸膜，聚烯烴系樹脂膜之製造方二 較佳為包括朝至少單軸方向延伸之延伸步驟更佳為包括 進行縱延伸及橫延伸之雙軸延伸步驟。 於上述延伸步驟中，可使用通常之料延伸方法或雙轴 :伸：法。作為具體例，可列舉：使用與螺旋型擠出機連 早層或多層之T模或1模將溶融樹脂呈片狀擠出之後， 以利用輥群之周速差之縱延伸進行單轴延伸之方法；其後 進而與使用拉幅爐之橫延伸組合之雙軸延伸方法丨以及利 用拉幅爐與線性馬達之組合、或拉幅爐 之 同時雙軸延伸方法等。再者，本說 ：之·，“的 骨〒’所謂縱延伸， 161006.doc 201235709 係表示朝MD(Machine Direction，加工方向）方向延伸，所 謂橫延伸’係表示朝與MD方向正交之片材寬度方向延 伸。 又’本發明中使用之聚烯烴系樹脂膜不僅可為單層構 造’亦可為包含2層以上之層之多層構造。 作為該等具有多層構造之聚烯烴系樹脂膜之製造方法， 可列舉：對各樹脂組合物之熔融原料使用多層之τ模或I模 進行共擠出之方法；使用多個模進行層壓之方法；利用乾The average particle diameter of the S 16 - 201235709 or the average dispersed particle diameter of the above organic filler is preferably within the range, and more preferably within the range of 〇 (1) 叩. When a filler having an average particle diameter or an average dispersed particle diameter of 〇〇5 or more is used, there is a tendency that the surface light source device using the light reflector of the present invention has a high tendency to easily obtain desired pores... If an average particle is used A filler having a diameter or an average dispersed particle diameter of i.5 μΓη or less has a tendency that the pore size is more uniform and a high reflectance is easily obtained. In order to adjust the pores which are formed by the extension molding of the polyolefin resin film described below, the amount of the filler to be added to the Yancheng polyolefin resin film is preferably in the range of 5 to 75% by weight. Preferably, it is in the range of 10 to 70% by weight. For example, the amount of the filler can be set to 15 to 5 % by weight, and can be set to 18 to 42% by weight. When the amount of the filler is 5% by weight or more, the number of sufficient pores tends to be easily obtained, and the brightness of the surface light source device using the light reflector of the present invention tends to be high. In addition, when the amount of the filler is not more than 5% by weight, the strength of the polyolefin resin film which is sufficient is easily obtained, and the fracture tends to be prevented during the elongation molding. (Other components) When the main polyolefin resin constituting the polyolefin resin film is a propylene resin, the elongation may be improved, and the melting point such as polyethylene or ethylene vinyl acetate may be adjusted to be lower than that of the propylene resin. The resin is 3 to 25% by weight. In the polyolefin resin film, it is preferred to blend a fluorescent whitening agent, a heat stabilizer, an antioxidant, a % external stabilizer (light stabilizer), and an ultraviolet absorber in a range that does not deviate from the gist of the present invention as needed. , dyes, pigments, 161006.doc 17 201235709 Antistatic agents, dispersants, lubricants, anti-caking agents, flame retardants, plasticizers, crystal nucleating agents and other known additives. As a heat stabilizer 'adjustable sterically hindered phenolic or phosphorus-based, amine-based stabilizers 0.001 to 1% by weight 'as UV stabilizer (light stabilizer), adjustable coordination amine or stupid triazole, two Stabilizers such as benzophenones 〇.〇 "~!% by weight" as a dispersing agent for inorganic fillers, which can be formulated with higher fatty acids such as decane coupling agents, oleic acid or stearic acid, metal soaps, polyacrylic acid, polymethyl propylene The method of producing a polyolefin resin film is 0.01 to 4% by weight. [Method for Producing Polyolefin-Based Resin Film] Generally, the resin-stretched film can be obtained by melt-kneading the resin composition using an extruder. The extrudate extrudes the melt in a sheet form, and the molten material is cooled and solidified on a cooling roll to obtain a resin sheet, and then obtained by extending it. The pores are formed or the uniform thickness is obtained for the purpose of the present invention. The polyolefin resin film to be used preferably comprises a resin stretch film extending in at least a uniaxial direction, and the second process of the polyolefin resin film preferably comprises an extending step extending in at least a uniaxial direction. vertical The biaxial stretching step of extending and laterally extending. In the above extending step, a usual material stretching method or a biaxial stretching method may be used. As a specific example, an early layer or a plurality of layers may be used in combination with a spiral extruder. After the T-die or the 1-die extrudes the molten resin in a sheet form, the uniaxial stretching is performed by the longitudinal extension of the circumferential speed difference of the roller group; and then the biaxial stretching combined with the lateral extension of the tenter furnace is used. Method 丨 and the use of a combination of a tenter furnace and a linear motor, or a simultaneous stretching method of a tenter furnace, etc. In addition, this said: "The bone 〒" so-called vertical extension, 161006.doc 201235709 The MD (Machine Direction) direction extends, and the so-called lateral extension means that the sheet extends in the width direction of the sheet orthogonal to the MD direction. Further, the polyolefin resin film used in the present invention may be a single layer structure or a multilayer structure including two or more layers. The method for producing the polyolefin-based resin film having a multilayer structure includes a method of co-extruding a plurality of τ-die or I-die using a molten material of each resin composition; and laminating using a plurality of dies Method

式層壓等方法對個別製造之膜進行積層之方法等。又，J 可對獲得之積層體進一步進行延伸成形。作為一例，於聚 烯烴系樹脂膜具有表面層/支持層/表面層之多層構造之情 形時，該等層之延伸轴數可全部為單轴延#，亦可全部= 雙軸延伸’還可為具有單軸/雙軸/單軸等不同延伸軸數 者。於上述聚稀烴系樹脂膜為雙軸延伸之情形時，可於積 層所有層後進彳f録延伸，但亦可列舉如下製造聚稀煙系 樹脂膜之方法，即於支持層之單軸方向之延伸(例如縱延 束之後’於4兩面上擠出表面層之熔融原料進行貼 /成夕層構& ’進而使其朝不同抽方向延伸（例如橫 延伸），僅支持層進行雙軸延伸。 ^調整該聚稀烴系樹脂膜中產生之孔隙之大小，上述延 申^驟中之面積延伸倍率較佳為13〜崎之 7〜70倍之範圍，尤佳 又住马 镥{為 65倍，最佳為25〜60倍。若面 積延伸倍率為右®7 隙，亦# ‘、，、.。之範圍内，則容易獲得微細之孔 “易抑制反射率之降低。再者，本說明書中，所謂 161006.doc -19- 201235709 面積延伸倍率，係以縱延伸倍率\橫延伸倍率所表示之倍 ^ 〇 ’ 口 延伸該聚烯烴系樹脂膜時之延伸溫度較佳為設為低於本 發明中使用之聚稀烴系樹脂之炼點的溫度。藉由設為該溫 度條件，可於聚烯烴系樹脂膜中形成以填充料為核心之空 隙。 匕更詳細而言，該延伸溫度較佳為比所使用之聚烯烴系樹 脂之熔點低2〜6CTC之溫度且比玻璃轉移點高2〜6(rc之溫 度。 狐 具體而言，於所使用之聚烯烴系樹脂為丙烯系樹脂（熔 點155〜167。〇時，延伸溫度較佳為95〜165〇c之範圍内。 又，上述延伸步驟中之延伸速度較佳為2〇〜35〇 m/min之範 圍内。 獲得之聚烯烴系樹脂膜根據需要亦可進行熱處理（退火 處理）’謀求結晶化之促進、或該膜之熱收縮率降低等。 用作本發明之光反射體之反射層的該聚烯烴系樹脂膜係 有助於光反射體之反射率者，故而其反射率較佳為 95〜105%之範圍内，更佳為96〜1〇〇%之範圍内。若聚烯烴 系樹脂膜之反射率為95%以上，則存在容易達成光反射體 所期望之光反射性能之傾向。反射率超過1 〇5%之聚烯烴 系樹脂膜存在以現狀（上述）之調配或成形方法難以獲得之 傾向。 又’用作本發明之光反射體之反射層的該聚烯烴系樹脂 膜之密度較佳為〇·5 g/cm3以上且未達〇.9 g/cm3，更佳為 161006.doc 2〇A method of laminating an individually produced film by a method such as lamination or the like. Further, J can further stretch the obtained laminated body. As an example, when the polyolefin resin film has a multilayer structure of a surface layer/support layer/surface layer, the number of extension axes of the layers may be all uniaxial extension #, or all = biaxial extension ' For those with different axes of single axis / double axis / single axis. In the case where the above-mentioned polyolefin resin film is biaxially stretched, it is possible to carry out the lamination of all the layers, but a method of producing a poly-smoke-based resin film, that is, a uniaxial direction of the support layer, may be mentioned. The extension (for example, after the longitudinal beam) extrudes the molten material of the surface layer on both sides of the surface to carry out the bonding/integration and then 'extends it in different pumping directions (for example, horizontally extending), and only supports the layer for biaxial Extending. ^Adjusting the size of the pores generated in the polyolefin resin film, the area extension ratio in the above-mentioned extension is preferably in the range of 7 to 70 times of 13 to Saki, and it is better to live in the stables. 65 times, the best is 25 to 60 times. If the area extension ratio is right ® 7 gap, and within the range of # ', ,,., it is easy to obtain a fine hole "to easily suppress the decrease of reflectance. In the present specification, the area extension ratio is 161006.doc -19-201235709, which is expressed by the longitudinal extension ratio/transverse extension ratio. The extension temperature of the polyolefin resin film is preferably set to be low. The refining point of the poly-hydrocarbon resin used in the present invention By setting this temperature condition, a void having a filler as a core can be formed in the polyolefin resin film. In more detail, the elongation temperature is preferably higher than the melting point of the polyolefin resin to be used. The temperature is 2 to 6 CTC lower and 2 to 6 higher than the glass transition point (the temperature of rc. Specifically, the polyolefin resin used is a propylene resin (melting point 155 to 167.), the stretching temperature is preferably Further, the stretching speed in the above stretching step is preferably in the range of 2 〇 to 35 〇 m/min. The obtained polyolefin resin film may be subjected to heat treatment (annealing treatment) as needed. 'the promotion of crystallization, or the decrease in the heat shrinkage rate of the film. The polyolefin resin film used as the reflective layer of the light reflector of the present invention contributes to the reflectance of the light reflector, so The reflectance is preferably in the range of 95 to 105%, more preferably in the range of 96 to 1% by weight. When the reflectance of the polyolefin resin film is 95% or more, it is easy to achieve the desired light reflector. The tendency of light reflection performance. Reflectivity exceeds 1 〇5 The polyolefin resin film of % tends to be difficult to obtain by the conventional (described above) blending or molding method. Further, the density of the polyolefin resin film used as the reflective layer of the light reflector of the present invention is preferably 〇· 5 g/cm3 or more and less than 9 g/cm3, more preferably 16100.doc 2〇

S 201235709 0·55〜0·8 g/em3之範_ Q若聚烯烴系樹脂膜之密度為 g/咖3以上，則存在容易獲得聚烯烴系樹脂膜之強度，且 於其延伸成形時容易防止斷裂之傾向。又，若為Q9 以下，則存在容易維持聚烯烴系樹脂膜之高反射率，光反 射體之重量不會過重故而容易處理的傾向。 該聚烯烴系樹脂膜之厚度較佳為3〇〜5〇〇 μπι之範圍内， 更佳為50〜400 μιη之範圍内。若聚烯烴系樹脂膜之厚度為 30 μχη以上，則存在穿透聚烯烴系樹脂膜之光量不會=度 增加而容易達成所期望之光反射率的傾向。又，若為5〇〇 μΓΠ以下，則存在光反射體之重量不會過重，且剛度亦適 度而容易處理的傾向。 [積層] 本發明之光反射體係於包含紙材之基材層之至少單面設 置有包含聚烯烴系樹脂膜之反射層者。因此本發明之光反 射體具有包含反射層/基材層、或者反射層/基材層/反射層 之積層構造。通常反射層於一面便足夠，但若於兩面貼合 則存在可防止捲曲而更容易處理之傾向。 聚烯烴系樹脂膜於紙材上之積層可採用先前公知之層壓 法。例如使用溶劑系之接著劑之乾式層壓法、使用水溶性 之接著劑之濕式層壓法、使用經加熱軟化之熱熔接著劑之 熱溶層壓法、使用經加熱熔融之樹脂之擠出層壓法等均可 使用。只要為紙材或聚烯烴系樹脂膜於接合面上包含熱密 封性樹脂層者’則亦可使用熱層壓法。就儘量抑制對聚稀 煙系樹脂膜之受熱歷程之目的、或方法之容易性而言，較 161006.doc -21 - 201235709 佳為使用乾式層壓法或濕式層壓法。 積層該等反射層與基材層後之本發明之光反射體可直接 捲取形成輥狀。又，本發明之光反射體可較佳地用作面光 源裝置用之光反射體。 [實施例] 以下使用製造例、實施例、比較例及試驗例進一步具體 說明本發明。以下所示之材料、使用量、比例、操作等只 要不脫離本發明之精神便可適當進行變更。因此，本發明 之範圍並不限定於以下所示之具體例。再者，將本發明之 實施例、比較例中使用之紙材歸納表示於表1中。 161006.doc -22- 201235709 I--ιΙΐ 厚度 (μιη) 〇 r· Η 375 536 200 300 密度 (g/cm3) Ο 卜 d 〇 q 00 o 00 c5 寸· 尺寸變化率 (%) 寸 CN Ο I ο I 寸 9 CN 9 寸 o 1 〇 CN Ο 泰伯剛度 (mN-m) 卜 〇 Ο) Ο 寸 (N 0.03 o Os f-^ 内容 h-1 Q 〇 PL, 〇 Η 〇 框 AS 你 — 銮.. 劍♦! 道林紙(王子製紙製，ΟΤΡ印相紙用原紙，可勃吸水度： 24.8 g/m2，基重：175 g/m2) 道林紙(王子特殊紙製，商品名：Marshmallow，基重： 262 g/m2) 麵 § U 1 〇 框 Η (含 η： 4 · F-^ Λ ® W ^ ^ ^ <Ν <Ν 2 别驗1这 2 $ (够 襄柃s Mbs 3- ^ fTV> ^ ^ a 1 •g o 框 r* ，—S ΓΛ + ·. lJ Ή %/ 合成紙(Yupo Corporation製，商品名：FPG200) 酚樹脂含浸紙(白石工業製，商品名：pl-pem) 製造例 No. r-H CN ΓΛ 寸 in VO 00 161006.doc -23- 201235709 [聚烯烴系樹脂膜之製造例] (製造例1〜4) 使用設定為250°C之擠出機，對將表2中記載之材料以表 3中s己载之調配比率混合而成的支持層（&)用組合物進行熔 融混練。其後將其擠出為片狀，以冷卻輥冷卻至約為 止，藉此獲得支持層（a)。將該支持層（a)再加熱至145£>(：， 利用多個輥群之周速差以表3中記載之倍率朝縱方向延 伸。其次，使用設定為25〇。(：之擠出機，對將表2中記載之 材料以表3中圯載之調配比率混合而成的表面層卬）用組合 物進行炫融混練’溶融擠出至上述所獲得之支持層⑷之兩 面，以成為表面層（b)/支持層⑷/表面層（b)之方式進行積 層獲得積層物。其次’將該積層物再加熱至⑽它，利用 拉1機以表3申5己載之倍率朝橫方向延伸。其後，於16〇它 下進行退火處理，然後冷卻至⑽為止，切開耳部、，獲得 具有表3中記載之厚度的三層構造之聚烯烴系樹脂膜。 (製造例5) 使用分別設定為25CTC之3台擠出機對將表2中記載之材 料以表3中記載之調配比率混合而成的支持層⑷用組合 物、及將表2中記載之材料以表3中記載之調配比率混合而 成的表面層細組合物進行熔融混練。其次，於多声模内 :成為表面層⑻/支持層⑷/表面層⑻之方式積層該等組 5物，將其擠出為片狀，以冷 7 ,輥令郃至約6〇t為止，藉 此獲得積層物。將該積層物再 ^ ^ A , 行加热至145 C，利用多個輥 群之周速差以表3令記載之倍率朝縱方向延伸。其次，將 161006.docS 201235709 0·55~0·8 g/em3 _ Q If the density of the polyolefin resin film is g/g3 or more, the strength of the polyolefin resin film is easily obtained, and it is easy to form and stretch. The tendency to prevent breakage. Further, when it is at most Q9, the high reflectance of the polyolefin resin film is easily maintained, and the weight of the light reflector is not excessively heavy, so that it tends to be easily handled. The thickness of the polyolefin resin film is preferably in the range of 3 Å to 5 Å μπι, more preferably in the range of 50 to 400 μηη. When the thickness of the polyolefin-based resin film is 30 μχη or more, the amount of light penetrating through the polyolefin-based resin film tends to increase, and the desired light reflectance tends to be easily obtained. Further, when the thickness is 5 〇〇 μΓΠ or less, the weight of the light reflector is not excessively heavy, and the rigidity tends to be moderate and easy to handle. [Laminate] The light reflecting system of the present invention is provided with a reflective layer containing a polyolefin resin film on at least one side of a base material layer containing a paper material. Therefore, the light reflector of the present invention has a laminated structure including a reflective layer/substrate layer or a reflective layer/substrate layer/reflective layer. Usually, the reflective layer is sufficient on one side, but if it is bonded to both sides, there is a tendency to prevent curling and to handle it more easily. The laminate of the polyolefin-based resin film on the paper may be a previously known lamination method. For example, a dry lamination method using a solvent-based adhesive, a wet lamination method using a water-soluble adhesive, a hot-melt lamination method using a heat-softening hot-melt adhesive, and a squeeze using a heated molten resin A lamination method or the like can be used. A heat lamination method can also be used as long as the paper material or the polyolefin resin film contains a heat-sealable resin layer on the joint surface. In order to suppress the heat history of the polystyrene resin film as much as possible, or the ease of the method, it is preferable to use a dry lamination method or a wet lamination method as compared with 161006.doc -21 - 201235709. The light reflector of the present invention in which the reflective layer and the substrate layer are laminated can be directly wound up to form a roll. Further, the light reflector of the present invention can be preferably used as a light reflector for a surface light source device. [Examples] Hereinafter, the present invention will be specifically described using production examples, examples, comparative examples and test examples. The materials, the amounts, the ratios, the operations, and the like shown below can be appropriately changed without departing from the spirit of the invention. Therefore, the scope of the present invention is not limited to the specific examples shown below. Further, the paper materials used in the examples and comparative examples of the present invention are summarized in Table 1. 161006.doc -22- 201235709 I--ιΙΐ Thickness (μιη) 〇r· Η 375 536 200 300 Density (g/cm3) Ο 卜 d 〇q 00 o 00 c5 inch · Dimensional change rate (%) inch CN Ο I ο I inch 9 CN 9 inch o 1 〇CN Ο Taber stiffness (mN-m) 〇Ο 〇Ο inch (N 0.03 o Os f-^ content h-1 Q 〇PL, 〇Η AS frame AS you - 銮.. Sword ♦! Dowling paper (Oji paper, base paper for photographic paper, water absorption: 24.8 g/m2, basis weight: 175 g/m2) Daolin paper (prince special paper, trade name: Marshmallow, basis weight: 262 g/m2) Face § U 1 〇 frame Η (including η: 4 · F-^ Λ ® W ^ ^ ^ <Ν <Ν 2 Do not test 1 this 2 $ (enough 襄柃s Mbs 3- ^ fTV> ^ ^ a 1 •go box r* , —S ΓΛ + ·. lJ Ή %/ Synthetic paper (manufactured by Yupo Corporation, trade name: FPG200) Phenolic resin impregnated paper (made by Shiraishi Industrial Co., Ltd., trade name: Pl-pem) Production Example No. rH CN ΓΛ inch in VO 00 161006.doc -23- 201235709 [Production Example of Polyolefin-Based Resin Film] (Production Examples 1 to 4) Using an extruder set at 250 ° C, Mix the materials listed in Table 2 with the blending ratios of s in Table 3. The resulting support layer (&) is melt-kneaded with the composition, and thereafter extruded into a sheet shape, and cooled to about 2,000 Å by a cooling roll, thereby obtaining a support layer (a). The support layer (a) is further Heating to 145 £> (:, using the peripheral speed difference of the plurality of roll groups to extend in the vertical direction at the magnification described in Table 3. Secondly, the use is set to 25 〇. (: The extruder, the pair will be in Table 2 The surface layer of the material described in the mixing ratio of the materials in Table 3 is mixed with the composition and melt-kneaded to the both sides of the support layer (4) obtained above to form the surface layer (b)/ The support layer (4)/surface layer (b) is laminated to obtain a laminate. Secondly, the laminate is reheated to (10), and it is extended in the lateral direction by a puller at a magnification of 5 liters. The film was annealed at a temperature of 16 Torr, and then cooled to (10), and the ear portion was cut to obtain a polyolefin resin film having a three-layer structure having the thickness shown in Table 3. (Production Example 5) The use was set to 25 CTC, respectively. Three extruders mixed the materials described in Table 2 with the blending ratios listed in Table 3. ⑷ into the support layer composition, materials in Table 2 and described in the formulations in Table 3 discloses the mixing ratio of the surface layer into fine melt-kneaded composition. Next, in a multi-acoustic mold: the surface layer (8) / the support layer (4) / the surface layer (8) are laminated to form the group 5, and extruded into a sheet shape, which is cooled to 7 and is rolled to about 6 〇t. Thereby obtaining a laminate. The laminate was further heated to 145 C, and the peripheral speed difference of the plurality of roll groups was extended in the longitudinal direction at the magnification described in Table 3. Secondly, will be 161006.doc

S -24- 201235709 該積層物再加埶至丨., m t …至160 C，利用拉幅機以表3 朝橫方向延伸。其徭，於T。己載之倍率 、後於16〇c下進行退火處理，然後冷 卻至60°C為止，切開耳部，獲得具有表3中記載之厚度的 三層構造之聚烯烴系樹脂膜。 (製造例6) 將市售之合成紙（Yupo Corporation製，商品名： FPG200)製成聚稀烴系樹脂膜。 161006.doc 25· 201235709 【(Nl 内容 #·> § P ^ 6 i.§ ω ω 1.3 If • c3 • ^ ^ § &Q I e ^ a -a m 〇 ΓΪΓ <N << 杯Ό — 拿3 ; 省加1制 裝丧：鹄 ® ,趔 ^ # MS 5¾辰 #资ΦΊ 呢礙總 tlftlll η®η 疼 f P ο s 5 % 6 ω § ο &s G - 寸 誕·. i% tt 1¾ ί β 龄紱 ^ α 5 6 荽2 β ~5& ΐ三 ns_ 〇4 Ο C4 tlfhil ψπ • Ρ r-H S έ 2 § 〇S ^ -m tm* ^ <5靶 I# ^ U 與ζΛ 费a Ο &I 鉍紱 cn -S w g 载〇 §4 m _ 蹯 Η' $ •έ k 〇 « 13 U • * 梅： ΓΓ << 杯 〇a^ 磁 替7 每1 U C? ^ 〇 tell · · 則 /-N 电蜍 重碳酸約(丸尾約股份有限公司製，商品名：Caltex7，平均粒徑(Microtrac法）：1 μπι) 金紅石型二氧化鈦(石原產業股份有限公司製，商品名：Tipaque CR-60，平均粒徑（目錄值）：0.2 m) 種類 PP1 PP2 HDPE 填充料(i) 填充料(ii) Ti02 -26- 161006.doc s 201235709 聚烯烴系樹脂膜之物性 反射率 (%) 98.2 99.0 99.3 97.5 97.3 1 ：90.0 密度 (g/cm·1) 0.69 0.60 0.75 0.69 0.65 0.79 厚度 (μηι) 〇 210 380 o ο 200 各層之厚度(μπι> 表面層 (b) o */> 合成紙(YupoCorporation製’商品名：FPG200) 支持層 ⑻ 〇 200 o o 表面層 (b) »Λ ΙΛ o l〇 CO 延伸轴數 表面層 (b) 單轴 單轴 單轴 雙轴 支持層 ⑻ 雙轴 雙轴 雙軸 雙轴 雙轴 表面層 (b) 5 單軸 單轴 單轴 雙轴 廷伸倍率(倍） 面積(MDxTD) 38.3 45.6 1 28.5 38.3 38.3 橫方向 (TD) «Λ 00 •Λ 0< »n ΙΛ 00 00 縱方向 (MD) «Λ 00 — 00 CO «Λ» — — 表面層(b>用组合物(重量％) Ti〇2 — — — * — 填充料 2〇(i) 2〇(ii) * 20(0 PP2 gv Os ON Ο 支持層(a)用组合物(重量％) Ti02 «Ο m 填充料 40⑴ 40(i) 4〇(i) 4〇(ΐ) 4〇(i) HDPE Tj- 寸 «Γί *rt »Λ «Λ 製造 例 No. - (N v> \〇 -27- 161006.doc 201235709 [光反射體之製造] (實施例1〜8、比較例1 ~4) 以表4中記載之組合使用表1中記載之紙材（基材層）、及 上述製造例中獲得之聚烯烴系樹脂膜（反射層），將包含聚 醚聚氨酯系接著劑（Toyo-Morton股份有限公司製，商品 名.TM-317)60重量份及聚異氰酸醋系硬化劑（Toyo-Morton股份有限公司製，商品名：CAT-11B)40重量份之接 著劑塗料以乾燥後固形物成分成為4 g/m2之方式塗佈於聚 烯烴系樹脂膜之單面，使其於60°C下乾燥1分鐘，設置接 著層。其次將其與紙材之單面重合，使用壓接輥進行壓 接’獲得包含反射層/基材層之2層構造之光反射體。 於實施例4中’以高密度聚乙烯之層壓層成為外側之方 式進行積層’獲得包含反射層/基材層/層壓層之3層構造之 光反射體。 (實施例9〜12) 以表4中記載之組合使用表1中記載之紙材（基材層）、及 上述製造例十獲得之聚烯烴系樹脂膜（反射層），將包含聚 越聚氨酯系接著劑（Toyo-Morton股份有限公司製，商品 名：TM-317)60重量份及聚異氰酸酯系硬化劑（T〇y〇_ Morton股份有限公司製，商品名：CAT11B)4〇重量份之接 著劑塗料以乾燥後固形物成分成為4 g/m2之方式塗佈於聚 烯烴系樹脂膜之單面，使其於6〇。〇下乾燥i分鐘，設置接 著層。其次將其與紙材之兩面重合，使用壓接輥進行壓 161006.doc -28 - 201235709 接’獲得包含反射層/基材層/反射層之3層構造之光反射 體。 (比較例5) 僅使用表1中記載之紙材之製造例2(未積層反射層）製成 光反射體。 (比較例6) 僅使用聚烯烴系樹脂膜之製造例3中獲得者（未積層於基 材層上）製成光反射體。 [試驗例] (泰伯剛度） 根據JIS P8125:2000之剛度試驗方法，使用泰伯剛度試 驗機（熊縠理器工業股份有限公司製，商品名：TaberS -24- 201235709 The laminate is further twisted to 丨., m t ... to 160 C, and is extended in the horizontal direction by a tenter using Table 3. The rest, in T. The film was subjected to an annealing treatment at a temperature of 16 ° C, and then cooled to 60 ° C, and the ear portion was cut to obtain a polyolefin resin film having a three-layer structure having the thickness shown in Table 3. (Production Example 6) A commercially available synthetic paper (manufactured by Yupo Corporation, trade name: FPG200) was used as a polyolefin resin film. 161006.doc 25· 201235709 [(Nl Content#·> § P ^ 6 i.§ ω ω 1.3 If • c3 • ^ ^ § &QI e ^ a -am 〇ΓΪΓ <N << Cup — Take 3; Save 1 to make funeral: 鹄®, 趔^ # MS 53⁄4辰# Ί Ί 呢 总 总 total tlftlll η®η 痛 f P ο s 5 % 6 ω § ο &s G - 寸诞. i% tt 13⁄4 ί β Age 绂^ α 5 6 荽2 β ~5& ΐ3 ns_ 〇4 Ο C4 tlfhil ψπ • Ρ rH S έ 2 § 〇S ^ -m tm* ^ <5 target I# ^ U & ζΛ fee a Ο &I 铋绂cn -S wg 〇§4 m _ 蹯Η' $ •έ k 〇« 13 U • * mei: ΓΓ << cup 〇 a^ magnetic replacement 7 per 1 UC ^ 〇 · · · - - - - - - - - - - - - - - ( - - - - ( ( ( ( ( ( ( ( ( ( ( ( ( ( - - - - - - - - ( ( - - ( - - - ( ( ( , Product name: Tipaque CR-60, average particle size (catalog value): 0.2 m) Type PP1 PP2 HDPE filler (i) Filler (ii) Ti02 -26- 161006.doc s 201235709 Properties of polyolefin resin film Reflectance (%) 98.2 99.0 99.3 97.5 97.3 1 :90.0 Density (g/ Cm·1) 0.69 0.60 0.75 0.69 0.65 0.79 Thickness (μηι) 〇210 380 o ο 200 Thickness of each layer (μπι> Surface layer (b) o */> Synthetic paper (YupoCorporation 'trade name: FPG200) Support layer (8) 〇200 oo surface layer (b) »Λ ΙΛ ol〇CO extended axis number surface layer (b) single-axis single-axis single-axis dual-axis support layer (8) dual-axis dual-axis dual-axis dual-axis dual-axis surface layer (b) 5 single Axis single-axis single-axis double-axis thrust ratio (times) Area (MDxTD) 38.3 45.6 1 28.5 38.3 38.3 Horizontal direction (TD) «Λ 00 •Λ 0< »n ΙΛ 00 00 Longitudinal direction (MD) «Λ 00 — 00 CO «Λ» — — Surface layer (b>Use composition (% by weight) Ti〇2 — — — * — Filler 2〇(i) 2〇(ii) * 20(0 PP2 gv Os ON Ο Support layer ( a) Composition (% by weight) Ti02 «Ο m Filling material 40(1) 40(i) 4〇(i) 4〇(ΐ) 4〇(i) HDPE Tj- inch «Γί *rt »Λ «Λ Manufacturing example No - (N v > \〇-27 - 161006.doc 201235709 [Production of Light Reflector] (Examples 1 to 8 and Comparative Examples 1 to 4) The paper materials described in Table 1 were used in combination with those described in Table 4. (substrate layer And the polyolefin-based resin film (reflective layer) obtained in the above-mentioned production example, comprising a polyether urethane-based adhesive (manufactured by Toyo-Morton Co., Ltd., trade name: TM-317), 60 parts by weight, and polyisocyanate. 40 parts by weight of an adhesive paint of vinegar-based curing agent (manufactured by Toyo-Morton Co., Ltd., trade name: CAT-11B), which is applied to a polyolefin resin film so that the solid content after drying becomes 4 g/m 2 The surface was dried at 60 ° C for 1 minute, and an underlayer was set. Next, this was superposed on one side of the paper, and pressed by a crimping roll to obtain a light reflector having a two-layer structure of a reflective layer/substrate layer. In the fourth embodiment, 'the laminate layer of the high-density polyethylene was laminated to the outer side' to obtain a light reflector having a three-layer structure of a reflective layer/base material layer/lamination layer. (Examples 9 to 12) The paper (base material layer) described in Table 1 and the polyolefin resin film (reflective layer) obtained in the above Production Example 10 were used in combination with the combination shown in Table 4, and the polyurethane was contained. 60 parts by weight of a binder (manufactured by Toyo-Morton Co., Ltd., trade name: TM-317) and a polyisocyanate-based curing agent (manufactured by T〇y〇_Morton Co., Ltd., trade name: CAT11B), 4 parts by weight The coating material was applied to one side of the polyolefin resin film so as to have a solid content of 4 g/m 2 after drying, and was applied to 6 Å. Dry under the arm for 1 minute and set the next layer. Next, it was placed on both sides of the paper, and a light-reflecting body having a three-layer structure including a reflective layer/substrate layer/reflective layer was obtained by pressing with a crimping roll 161006.doc -28 - 201235709. (Comparative Example 5) A light reflector was produced using only Production Example 2 (unlayered reflective layer) of the paper material described in Table 1. (Comparative Example 6) A light reflector was produced by using only the polyolefin resin film obtained in Production Example 3 (not laminated on the substrate layer). [Test Example] (Taber stiffness) According to the stiffness test method of JIS P8125:2000, a Taber stiffness tester (manufactured by Xiongyi Lishi Industrial Co., Ltd., trade name: Taber) was used.

Stiffness Tester)對各製造例中獲得之紙材、及各實施例、 比較例中獲得之光反射體測定泰伯剛度。將結果示於表1 及表4。 (使環境溫度自20°C變化至70。(：時之尺寸變化率） 將各製造例巾獲得之紙材、及各實_、比較例中獲得 之光反射體裁切為寬4 mm、長20 mm之樣品尺寸，使用熱 機械分析裝置（精工電子股份有限公司公司製，商；名. TMA12GC)’於荷重5g、升溫速度5t/min之條件下，測定 自2(TC升溫至7代時之尺寸變化率。將結果示於表】及表 (聚稀烴糸樹脂膜之反射率） 161006.doc -29· 201235709 各製造例中獲得之聚烯烴系樹脂膜之表面層（b)側之反 射率、及各實施例、比較例中獲得之光反射體之反射層表 面之反射率係使用搭載有直徑150 mm之積分球之分光光度 计（曰立製作所股份有限公司製，商品名：U-3 3 1 0)，根據 JIS-Z8722之條件d記載之方法，作為波長55〇 nm下之反射 率進行測定。測定結果係表示為將作為基準板而附屬之氧 化鋁白板之反射率設為1〇〇%時之相對反射率。將結果示 於表3及表4。 再者，實施例11之光反射體之反射率係於製造例2之力 射層側之表面進行測定。 (厚度、密度） 各製造例中獲得之紙材及聚烯烴系樹脂膜之厚度、密^ 係根據JIS-P8118:1998進行測定。聚烯烴系樹脂膜中之^ 層之厚度係使用電子顯微鏡觀察各膜之剖面，根據外觀导 斷層間之界面’之後由求出之整體厚度與各層之厚度比, 算出。將結果示於表1及表3。 161006.docStiffness Tester) The Taber stiffness was measured for the paper material obtained in each of the production examples and the light reflector obtained in each of the examples and the comparative examples. The results are shown in Tables 1 and 4. (The ambient temperature was changed from 20 ° C to 70. (: dimensional change rate at the time) The paper material obtained in each of the manufacturing examples, and the light reflector obtained in each of the actual and comparative examples were cut to have a width of 4 mm and a length. The sample size of 20 mm was measured using a thermomechanical analysis device (manufactured by Seiko Instruments Inc., Ltd., trade name; TMA12GC) at a load of 5 g and a heating rate of 5 t/min. The dimensional change rate. The results are shown in the table and the table (reflectance of the polythene resin film). 161006.doc -29·201235709 The surface layer (b) side of the polyolefin resin film obtained in each production example The reflectance and the reflectance of the surface of the reflective layer of the light reflector obtained in each of the examples and the comparative examples were measured by using a spectrophotometer equipped with an integrating sphere having a diameter of 150 mm (manufactured by Kyoritsu Seisakusho Co., Ltd., trade name: U -3 3 1 0) The reflectance at a wavelength of 55 〇 nm is measured according to the method described in Condition d of JIS-Z8722. The measurement result is expressed by the reflectance of the alumina white plate attached as a reference plate. Relative reflectance at 1〇〇%. Further, the reflectance of the light reflector of Example 11 was measured on the surface of the force-transmitting layer side of Production Example 2. (Thickness, Density) Paper and Polymer obtained in each Production Example The thickness and the density of the olefin-based resin film were measured in accordance with JIS-P8118:1998. The thickness of the layer in the polyolefin-based resin film was observed by an electron microscope, and the cross-section of each film was observed by an electron microscope. The ratio of the overall thickness of the layers to the thickness of each layer was calculated and the results are shown in Tables 1 and 3. 161006.doc

S •30· 201235709 [表4] 、--- 光尤 L射體之構 成 < 光反射體之物性評價 反射層 No. 基材層 No· 反射層 No. 泰伯剛度 尺寸變化率 (%) 反射率 (%) 實施例1 1 1 - —-—J 2.1 -0.2 98.2 實施例2 1 2 - 2.5 -0.1 98.3 實施例3 1 3 - 19 -0.1 98.3 實施例4 1 5 - 2.8 0.0 98.3 比較例1 1 6 - 0.7 -0.4 98.2 比較例2 1 7 - 2.7 0.5 98.3 比較例3 1 8 - 150 . 0.2 98.2 實施例5 2 2 - 5.3 -0.1 99.0 實施例6 3 2 - 17 -0.1 99.4 實施例7 4 2 - 2.6 -0.1 97.6 實施例8 5 2 - 1.5 -0.2 97.5 比較例4 6 2 5.2 -0.1 91.1 實施例9 1 2 1 5.2 0.0 98.3 實施例10 1 4 1 55 -0.2 98.2 實施例11 2 2 6 23 0.1 99.0 實施例12 4 2 4 5.5 0.0 97.7 比較例5 - 2 - 0.9 -0.2 87.0 比較例6 3 • 5.2 0.5 99.3 [面光源裝置之製造] (實施例13) 使用32英忖型之LED邊緣照明型大型液晶電視（東芝股 份有限公司製，商品名·· Regza 32RE1W)之面光源裝置， 自其去除光反射體’設置各實施例中獲得之光反射體進行 替代’獲得面光源裝置。 所製造之面光源裝置均為高亮度，且看不到亮斑。 161006.doc •31 · 201235709 [本發明之實施例之優點] 實施例之光反射體與包含白色聚酯膜之先前之光反射體 (例如參照曰本專利特開平4-239540號公報）不同，具有即 便光量增加色調之變化亦較少之優點。又，實施例之光反 射體與包含白色聚烯烴膜之先前之光反射體（例如參照曰 本專利特開2002-031704號公報及日本專利特開2004-1 09990號公報）不同，具有即便大型化亦難以產生撓曲， 亦難以產生亮斑之優點。進而，實施例之光反射體與對白 色聚烯烴膜貼合其他具有剛性之樹脂膜作為襯襄材料的先 前之光反射體（例如參照曰本專利特開2004-109990號公報） 不同，因熱所致之尺寸變化較小。因此，具有即便應用於 頻繁發生伴隨開關之溫度變化之液晶電視等中，亦難以產 生撓曲，亦難以產生亮斑的優點。 又’實施例之光反射體可毫不費勁地捲繞成輥狀。又， 亦可將捲繞成輥狀之光反射體再次拉出，切割為所期望之 尺寸或進行加工。貼合有白色聚烯烴膜與金屬板之先前之 光反射體（例如參照曰本專利特開2004_16782〇號公報）、或 貼合有白色聚烯烴膜與熱硬化型樹脂含浸紙之先前之光反 射體（例如參照日本專利特開2005_099314號公報）無法捲繞 成輥狀，故而應用用途受到限制。本發明之光反射體可穩 定應用於該等先前之光反射體實際上無法應用之大型液晶 電視。 【圖式簡單說明】 圖1係邊緣照明方式之内置式光源之一例的剖面圖。 161006.docS •30· 201235709 [Table 4], --- Composition of the light-E-Lacting body < Physical property evaluation of the light-reflecting body Reflecting layer No. Base material layer No. Reflecting layer No. Taber stiffness dimensional change rate (%) Reflectance (%) Example 1 1 1 - - - J 2.1 - 0.2 98.2 Example 2 1 2 - 2.5 - 0.1 98.3 Example 3 1 3 - 19 - 0.1 98.3 Example 4 1 5 - 2.8 0.0 98.3 Comparative Example 1 1 6 - 0.7 -0.4 98.2 Comparative Example 2 1 7 - 2.7 0.5 98.3 Comparative Example 3 1 8 - 150 . 0.2 98.2 Example 5 2 2 - 5.3 - 0.1 99.0 Example 6 3 2 - 17 - 0.1 99.4 Example 7 4 2 - 2.6 - 0.1 97.6 Example 8 5 2 - 1.5 - 0.2 97.5 Comparative Example 4 6 2 5.2 - 0.1 91.1 Example 9 1 2 1 5.2 0.0 98.3 Example 10 1 4 1 55 - 0.2 98.2 Example 11 2 2 6 23 0.1 99.0 Example 12 4 2 4 5.5 0.0 97.7 Comparative Example 5 - 2 - 0.9 - 0.2 87.0 Comparative Example 6 3 • 5.2 0.5 99.3 [Manufacture of surface light source device] (Example 13) Using 32-inch type LED A surface light source device of a large-size edge-lit LCD TV (manufactured by Toshiba Corporation, trade name, Regza 32RE1W), from which the light reflector is removed, is provided in each of the embodiments. The obtained light reflector for substitution 'obtained surface light source device. The surface light source devices manufactured were all high in brightness and did not see bright spots. 161006.doc • 31 · 201235709 [Advantages of Embodiments of the Invention] The light reflector of the embodiment is different from the prior light reflector including the white polyester film (for example, see Japanese Patent Laid-Open No. Hei-4-239540). There is an advantage that the change in hue is small even if the amount of light is increased. Further, the light reflector of the embodiment differs from the conventional light reflector including the white polyolefin film (for example, see Japanese Patent Laid-Open Publication No. 2002-031704 and Japanese Patent Laid-Open No. 2004-1 09990). It is also difficult to produce deflection, and it is difficult to produce the advantages of bright spots. Further, the light reflector of the embodiment is different from the conventional light reflector in which another rigid resin film is bonded to the white polyolefin film as a lining material (for example, refer to Japanese Patent Laid-Open Publication No. 2004-109990), The resulting dimensional change is small. Therefore, even in a liquid crystal television or the like which is frequently applied to temperature changes accompanying a switch, it is difficult to produce deflection and it is difficult to produce bright spots. Further, the light reflector of the embodiment can be wound into a roll shape without any difficulty. Further, the light reflector wound in a roll shape may be pulled out again, cut into a desired size or processed. A conventional light reflector in which a white polyolefin film and a metal plate are bonded (for example, refer to Japanese Patent Laid-Open Publication No. 2004-16782 A), or a light reflection of a white polyolefin film and a thermosetting resin impregnated paper. The body (for example, see JP-A-2005_099314) cannot be wound into a roll shape, and thus its application is limited. The light reflector of the present invention can be stably applied to a large liquid crystal television in which the previous light reflectors are practically unusable. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a cross-sectional view showing an example of an internal light source of an edge illumination method. 161006.doc

S •32· 201235709 圖2係本發明之光反射體之一樣態的剖面圖。 【主要元件符號說明】 11 光反射體 12 丙烯酸系板 13 網點印刷 14 導光板 15 擴散板 16 光源 21 光反射體 22 基材層 23 反射層 161006.doc ·33-S • 32· 201235709 Fig. 2 is a cross-sectional view showing the same state of the light reflector of the present invention. [Main component symbol description] 11 Light reflector 12 Acrylic plate 13 Dot printing 14 Light guide plate 15 Diffuser plate 16 Light source 21 Light reflector 22 Base material layer 23 Reflective layer 161006.doc ·33-

Claims (1)

201235709 七、申請專利範圍： 1. 一種光反射體，其係於包含紙材之基材層之至少單面設 置有包含聚稀烴系樹脂膜之反射層者，且反射層表面之 反射率為95〜105%，泰伯剛度為〇 4〜1〇〇 mNm，使環境 , 溫度自2(TC變化至7(TC時之尺寸變化率為_〇 3〜〇 3% /兄 2. 如請求項【之力反射體，丨中上述紙材包含使植物纖維 相互糾結而膠著者50重量％以上。 3. 如請求項1之光反射體，其中上述紙材包含選自由JIS_ P0001:1998中規定之象牙紙、銅版紙、印刷用紙、〇cr 用紙、套版印刷用紙、加工用紙、卡片用厚紙、壁紙原 紙、拋光塗料紙、牛皮紙、凹版印刷用紙、輕量堂料 紙、塗料紙、紙器用板紙、道林紙、白板紙、模造紙、 中質紙、塗佈印刷用紙、塗料紙原紙、阻燃紙、鎖地 紙、微塗佈印刷用紙、防水紙、及牛奶盒用紙板原紙所 組成之群中任一種、或樹脂塗料紙。 4. 如請求項1至3中任一項之光反射體，其中上述紙材之泰 伯剛度為0.1 ~ 1 〇 〇 mN. m。 5. 如請求項1至3中任一項之光反射體，其中使環境溫度自 20°C變化至70°C時之上述紙材之尺寸變化率為_〇 5〜 0.3% 〇 6. 如請求項i至3中任一項之光反射體，其中上述紙椅之密 度為 0.6〜1.2 g/cm3。 7. 如請求項丨至3中任一項之光反射體’其中上述紙材之厚 度為 70~700 μιη。 161006.doc 201235709 8. 如請求項1至3中任一項之光反射體，其中上述聚烯烴系 樹脂膜包含丙烯系樹脂。 9. 如請求項1至3中任一項之光反射體，其中上述聚烯烴系 樹月a膜包含平均粒徑〇.〇5~1 ·5 μπι之無機填充料及平均分 散粒控0.05〜1.5 μπι之有機填充料之至少一者5〜75重量 %。 10. 如凊求項1至3中任一項之光反射體，其中上述聚烯烴系 樹脂膜朝至少單軸方向延伸。 11. 如請求項1至3中任一項之光反射體，其中上述聚烯烴系 樹脂膜為多層構造。 12. 如凊求項1至3中任一項之光反射體，其中上述聚烯烴系 樹脂膜之反射率為95〜105%。 13. 如請求項1至3中任一項之光反射體，其中上述聚烯烴系 樹月日膜之社、度為0·5 g/cm3以上且未達〇.9 g/cm3。 14. 如請求項1至3中任一項之光反射體，其中上述聚烯烴系 樹脂膜之厚度為3〇〜5〇〇 μη1。 15. 如請求項1至3中任一項之光反射體，其中上述光反射體 被捲繞成輥狀。 16. —種面光源裝置’其使用如請求項丨至15中任一項之光 反射體。 161006.doc201235709 VII. Patent Application Range: 1. A light reflector which is provided on at least one side of a substrate layer containing a paper material, and is provided with a reflective layer containing a polyolefin resin film, and the reflectance of the surface of the reflective layer is 95~105%, Taber stiffness is 〇4~1〇〇mNm, making the environment, temperature from 2 (TC change to 7 (TC when the dimensional change rate is _〇3~〇3% / brother 2. As requested The force of the above-mentioned paper material comprises: 50% by weight or more of the entanglement of the plant fibers, and the light reflector of claim 1, wherein the paper material comprises a color selected from the group consisting of JIS_P0001:1998 Ivory paper, coated paper, printing paper, 〇cr paper, plate printing paper, processing paper, thick paper for cards, wallpaper base paper, polished coated paper, kraft paper, gravure printing paper, lightweight paper, coated paper, paperboard for paper, Groups of Daolin paper, whiteboard paper, mold paper, medium paper, coated printing paper, coated paper base paper, flame retardant paper, paper-locked paper, micro-coated printing paper, waterproof paper, and cardboard base paper for milk carton Any of them, or resin coated paper 4. The light reflector of any one of claims 1 to 3, wherein the paper has a Taber stiffness of 0.1 to 1 〇〇mN.m. 5. Light reflection according to any one of claims 1 to 3. The light-reflecting body of the above-mentioned paper, wherein the ambient temperature is changed from 20 ° C to 70 ° C, the light-reflecting body of any one of claims 1 to 3, wherein The paper chair has a density of 0.6 to 1.2 g/cm3. 7. The light reflector of any one of claims 3 to 3 wherein the thickness of the paper is 70 to 700 μηη. 161006.doc 201235709 8. The light-reflecting body of any one of Claims 1 to 3, wherein the above-mentioned polyolefin-based resin film contains a propylene-based resin, and the light-reflecting body according to any one of claims 1 to 3, wherein the above-mentioned polyolefin-based tree a The film comprises an inorganic filler having an average particle diameter of 〇. 5~1 · 5 μπι and at least one of 5 to 75% by weight of the organic filler of 0.05 to 1.5 μπι of the average dispersed particle size. 10. If the items 1 to 3 are sought The light reflector of any one of the above, wherein the polyolefin resin film extends in at least a uniaxial direction. 11. The light according to any one of claims 1 to 3 The above-mentioned polyolefin-based resin film has a multilayer structure. The light-reflecting body according to any one of items 1 to 3, wherein the polyolefin-based resin film has a reflectance of 95 to 105%. The light reflector according to any one of claims 1 to 3, wherein the degree of the above-mentioned polyolefin-based tree-shaped film is 0. 5 g/cm 3 or more and less than 9 g/cm 3 . The light reflector of any one of items 1 to 3, wherein the polyolefin resin film has a thickness of 3 〇 to 5 〇〇 μη1. The light reflector of any one of claims 1 to 3, wherein the light reflector is wound into a roll shape. 16. A surface light source device which uses the light reflector of any one of claims 15 to 15. 161006.doc
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