JP5747051B2 - 横断方向延伸フィルムを製造するためのプロセス - Google Patents
横断方向延伸フィルムを製造するためのプロセス Download PDFInfo
- Publication number
- JP5747051B2 JP5747051B2 JP2013047087A JP2013047087A JP5747051B2 JP 5747051 B2 JP5747051 B2 JP 5747051B2 JP 2013047087 A JP2013047087 A JP 2013047087A JP 2013047087 A JP2013047087 A JP 2013047087A JP 5747051 B2 JP5747051 B2 JP 5747051B2
- Authority
- JP
- Japan
- Prior art keywords
- film
- stretching
- boundary
- plane
- stretched
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
- B29C55/02—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets
- B29C55/04—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets uniaxial, e.g. oblique
- B29C55/08—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets uniaxial, e.g. oblique transverse to the direction of feed
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2793/00—Shaping techniques involving a cutting or machining operation
- B29C2793/009—Shaping techniques involving a cutting or machining operation after shaping
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
- B29C55/02—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets
- B29C55/20—Edge clamps
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C69/00—Combinations of shaping techniques not provided for in a single one of main groups B29C39/00 - B29C67/00, e.g. associations of moulding and joining techniques; Apparatus therefore
- B29C69/001—Combinations of shaping techniques not provided for in a single one of main groups B29C39/00 - B29C67/00, e.g. associations of moulding and joining techniques; Apparatus therefore a shaping technique combined with cutting, e.g. in parts or slices combined with rearranging and joining the cut parts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2067/00—Use of polyesters or derivatives thereof, as moulding material
- B29K2067/003—PET, i.e. poylethylene terephthalate
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
- B29K2995/0037—Other properties
- B29K2995/005—Oriented
- B29K2995/0051—Oriented mono-axially
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2011/00—Optical elements, e.g. lenses, prisms
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
- G02B5/3025—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state
- G02B5/3033—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state in the form of a thin sheet or foil, e.g. Polaroid
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S425/00—Plastic article or earthenware shaping or treating: apparatus
- Y10S425/041—Reshape
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
- Polarising Elements (AREA)
- Liquid Crystal (AREA)
Description
x/x0=(1/4)(y/x0)2+1
左側境界放物線軌道は上記式1の左側にマイナス1を乗じることにより得られる。
d(x/x1)/d(y/x1)=tan(θ)
を満足させるように境界軌道を制限するが、ここでtan(θ)は広がり角度θの接線、yは所定のx座標に対応する右側の境界軌道上の対向点の現在位置のy座標である。次に例えばTDDRの過程に沿った1/tan(θ)、(x/x1)を1から最大所望値を積分することにより微分方程式を解いて、分析的あるいは数値的のいずれかで右側の境界軌道の完全な座標セット{(x,y)}を得る。広がり角度はフィルムの中心線の進行方向と(x,y)における瞬間境界軌道との間にできる非負数の最小角度である。式2の対称的平面の場合には、中心線の進行はMDに沿っており、例えばほぼ従来のテンターの場合のように境界軌道がMDに平行な時には広がり角度はゼロである。
U=(1/MDDR−1)/(TDDR1/2−1)
状態U=1は一軸条件を満たす。ゼロと1との間のUの状態はあるレベルのMD張力が生じる中間状態を表している。1に近い状態はほぼあるいは実質的に一軸性である。1より大きいUの状態は様々な過剰緩和レベルを表している。これらの過剰緩和状態は境界端部からのMD圧縮を引き起こす。形状および材料剛性に対してMD圧縮レベルが十分である場合には、フィルムは曲がったりしわが寄ったりする。いくつかの実施例では、100%以下の過剰供給に対応して、積MDDR・(TDDR)1/2が伸張粗さに対して少なくとも0.5であることが好ましい。
(x+c)/(x1+c)=(1/4)(y/(x1+c))2+1
ここで「c」は正のオフセット距離である。この部類の軌道は8未満のTDDRに対する好適な定数Uの概数である。
((TDDR)(MDDR))−4+((TDDR)(MDDR))2−(TDDR)−2−(MDDR)−2−sin2(θ)((TDDR)(MDDR))−2=0
MDDRは広がり角度のコサインである。本発明のこの任意の方法は次にこの部類の境界軌道を特定する。
Claims (1)
- 伸張機内で多層フィルムの対向端部を保持しながら前記フィルムの流れ方向である機械方向に沿って前記多層フィルムを搬送するステップと、
前記伸張機の伸張領域において、前記機械方向に向けて次第に幅が末広がりとなる経路に沿って前記多層フィルムの対向端部を移動させながら前記多層フィルムを伸張するステップとを有し、
前記末広がりとなる経路が関数形
x/x0=±((1/4)(y/x0)2+1)
を有し、x軸が前記多層フィルムの面内に定義されるとともに前記多層フィルムの前記機械方向の中心軸に位置するx=0で前記機械方向に直交し、y軸が前記多層フィルムの前記面内に定義されるとともに前記伸張機内で前記多層フィルムを伸張するステップを開始するy=0で前記機械方向に沿っており、x0がy=0の時の前記多層フィルムの前記中心軸からの前記端部の距離である方法。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US29494001P | 2001-05-31 | 2001-05-31 | |
US60/294,940 | 2001-05-31 |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2002593121A Division JP2005501757A (ja) | 2001-05-31 | 2002-05-29 | 実質的一軸性を有する横断方向延伸フィルムを製造するためのプロセスおよび装置 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2013151162A JP2013151162A (ja) | 2013-08-08 |
JP5747051B2 true JP5747051B2 (ja) | 2015-07-08 |
Family
ID=23135569
Family Applications (5)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2002593122A Expired - Lifetime JP4623935B2 (ja) | 2001-05-31 | 2002-05-29 | 実質的一軸配向を有する横断方向延伸フィルムを製造するための方法 |
JP2002593121A Pending JP2005501757A (ja) | 2001-05-31 | 2002-05-29 | 実質的一軸性を有する横断方向延伸フィルムを製造するためのプロセスおよび装置 |
JP2009229012A Expired - Lifetime JP5888835B2 (ja) | 2001-05-31 | 2009-09-30 | フィルムを処理する方法および伸張機 |
JP2012030721A Expired - Lifetime JP5921908B2 (ja) | 2001-05-31 | 2012-02-15 | 伸張機 |
JP2013047087A Expired - Lifetime JP5747051B2 (ja) | 2001-05-31 | 2013-03-08 | 横断方向延伸フィルムを製造するためのプロセス |
Family Applications Before (4)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2002593122A Expired - Lifetime JP4623935B2 (ja) | 2001-05-31 | 2002-05-29 | 実質的一軸配向を有する横断方向延伸フィルムを製造するための方法 |
JP2002593121A Pending JP2005501757A (ja) | 2001-05-31 | 2002-05-29 | 実質的一軸性を有する横断方向延伸フィルムを製造するためのプロセスおよび装置 |
JP2009229012A Expired - Lifetime JP5888835B2 (ja) | 2001-05-31 | 2009-09-30 | フィルムを処理する方法および伸張機 |
JP2012030721A Expired - Lifetime JP5921908B2 (ja) | 2001-05-31 | 2012-02-15 | 伸張機 |
Country Status (9)
Country | Link |
---|---|
US (6) | US6939499B2 (ja) |
EP (4) | EP2277682B1 (ja) |
JP (5) | JP4623935B2 (ja) |
KR (1) | KR100866176B1 (ja) |
CN (1) | CN100374282C (ja) |
AT (1) | ATE530329T1 (ja) |
AU (1) | AU2002310230A1 (ja) |
TW (2) | TW575494B (ja) |
WO (2) | WO2002096621A2 (ja) |
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