FR2250625A1 - Positively gripping transversely oriented polypropylene foils - by softening the foil edges prior to tentering gripper engagement - Google Patents

Positively gripping transversely oriented polypropylene foils - by softening the foil edges prior to tentering gripper engagement

Info

Publication number
FR2250625A1
FR2250625A1 FR7437433A FR7437433A FR2250625A1 FR 2250625 A1 FR2250625 A1 FR 2250625A1 FR 7437433 A FR7437433 A FR 7437433A FR 7437433 A FR7437433 A FR 7437433A FR 2250625 A1 FR2250625 A1 FR 2250625A1
Authority
FR
France
Prior art keywords
tentering
softening
oriented polypropylene
transversely oriented
foil edges
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.)
Granted
Application number
FR7437433A
Other languages
English (en)
French (fr)
Other versions
FR2250625B3 (de
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hoechst AG
Original Assignee
Hoechst AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hoechst AG filed Critical Hoechst AG
Publication of FR2250625A1 publication Critical patent/FR2250625A1/fr
Application granted granted Critical
Publication of FR2250625B3 publication Critical patent/FR2250625B3/fr
Granted legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • B29C37/00—Component parts, details, accessories or auxiliary operations, not covered by group B29C33/00 or B29C35/00
    • B29C2037/90—Measuring, controlling or regulating
    • 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
    • B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
FR7437433A 1973-11-14 1974-11-13 Positively gripping transversely oriented polypropylene foils - by softening the foil edges prior to tentering gripper engagement Granted FR2250625A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19732356743 DE2356743C3 (de) 1973-11-14 1973-11-14 Verfahren und Vorrichtung zur Verbesserung der Griffsicherheit von Spannkluppen zur führenden Halterung von Folienbahnrändern während eines Querstreckprozesses

Publications (2)

Publication Number Publication Date
FR2250625A1 true FR2250625A1 (en) 1975-06-06
FR2250625B3 FR2250625B3 (de) 1977-08-12

Family

ID=5898030

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7437433A Granted FR2250625A1 (en) 1973-11-14 1974-11-13 Positively gripping transversely oriented polypropylene foils - by softening the foil edges prior to tentering gripper engagement

Country Status (8)

Country Link
JP (1) JPS5080367A (de)
BE (1) BE822083A (de)
DE (1) DE2356743C3 (de)
FI (1) FI328274A (de)
FR (1) FR2250625A1 (de)
IT (1) IT1023212B (de)
LU (1) LU71274A1 (de)
NL (1) NL7414348A (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0422035A1 (de) * 1988-06-22 1991-04-17 Du Pont Vorrichtung und verfahren zum herausziehen von filmen.
WO1998025754A1 (en) * 1996-12-11 1998-06-18 E.I. Du Pont De Nemours And Company Film bead heating for simultaneous stretching
US7037461B1 (en) 1999-12-21 2006-05-02 3M Innovative Properties Company Method of stretching film

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19651515C1 (de) * 1996-12-11 1998-04-23 Brueckner Maschbau Verfahren und Vorrichtung zur Folienaufheizung sowie Meßeinrichtung zur Messung der Folientemperatur
US6916440B2 (en) 2001-05-31 2005-07-12 3M Innovative Properties Company Processes and apparatus for making transversely drawn films with substantially uniaxial character
WO2006110402A1 (en) 2005-04-08 2006-10-19 3M Innovative Properties Company Heat setting optical films
DE502006002013D1 (de) * 2005-05-10 2008-12-18 Treofan Germany Gmbh & Co Kg Verfahren zum querverstrecken einer materialbahn
CN101300121B (zh) * 2005-11-04 2012-10-24 柯尼卡美能达精密光学株式会社 纤维素类树脂膜、纤维素类树脂膜的制造方法、防反射膜、偏振片及液晶显示装置

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0422035A1 (de) * 1988-06-22 1991-04-17 Du Pont Vorrichtung und verfahren zum herausziehen von filmen.
EP0422035B1 (de) * 1988-06-22 1996-02-07 E.I. Du Pont De Nemours And Company Verfahren und vorrichtung zum strecken von filmen
WO1998025754A1 (en) * 1996-12-11 1998-06-18 E.I. Du Pont De Nemours And Company Film bead heating for simultaneous stretching
US7037461B1 (en) 1999-12-21 2006-05-02 3M Innovative Properties Company Method of stretching film

Also Published As

Publication number Publication date
NL7414348A (nl) 1975-05-16
JPS5080367A (de) 1975-06-30
FR2250625B3 (de) 1977-08-12
DE2356743C3 (de) 1978-06-08
FI328274A (de) 1975-05-15
LU71274A1 (de) 1976-09-06
BE822083A (fr) 1975-05-12
DE2356743B2 (de) 1977-10-13
IT1023212B (it) 1978-05-10
DE2356743A1 (de) 1975-05-22

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Legal Events

Date Code Title Description
ST Notification of lapse