GB1437980A - Method and apparatus for continuously varying the cross-section of thermoplastic film webs - Google Patents

Method and apparatus for continuously varying the cross-section of thermoplastic film webs

Info

Publication number
GB1437980A
GB1437980A GB4018573A GB4018573A GB1437980A GB 1437980 A GB1437980 A GB 1437980A GB 4018573 A GB4018573 A GB 4018573A GB 4018573 A GB4018573 A GB 4018573A GB 1437980 A GB1437980 A GB 1437980A
Authority
GB
United Kingdom
Prior art keywords
web
stretching
cross
section
heating
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
Application number
GB4018573A
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 GB1437980A publication Critical patent/GB1437980A/en
Expired 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
    • B29C55/10—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets multiaxial
    • B29C55/12—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets multiaxial biaxial
    • 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
    • B29C55/06—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets uniaxial, e.g. oblique parallel with the direction of feed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D7/00—Producing flat articles, e.g. films or sheets
    • 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)

Abstract

1437980 Non-uniform stretching of films HOECHST AG 24 Aug 1973 [28 Aug 1972] 40185/73 Heading B5B The cross-section of thermoplastic film webs is varied by non-uniformly heating the web during longitudinal stretching and varying this non-uniformity so that the temperature distribution across the web changes with time, the temperature differences in the web causing non-uniform stretching of the film. The heating may be by several infra-red radiators, each of which can be separately controlled to obtain the desired effect or by a single heater, separated from the web by a perforated plate which is moved transversely across the web, thereby moving the heat "shadow" and zones of no, or little heating to and fro across the web. Further stretching processes may be effected prior to or after the longitudinal stretching process after which the web may also be thermofixed. Preferred for use in the process are films of polyethylene terephthalate, polypropylene, polyethylene and polyamides. See also Specification 1,437,979.
GB4018573A 1972-08-28 1973-08-24 Method and apparatus for continuously varying the cross-section of thermoplastic film webs Expired GB1437980A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19722242284 DE2242284A1 (en) 1972-08-28 1972-08-28 METHOD AND DEVICE FOR CONTINUOUS CHANGING THICKNESS PROFILE OF THERMOPLASTIC FILM

Publications (1)

Publication Number Publication Date
GB1437980A true GB1437980A (en) 1976-06-03

Family

ID=5854781

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4018573A Expired GB1437980A (en) 1972-08-28 1973-08-24 Method and apparatus for continuously varying the cross-section of thermoplastic film webs

Country Status (9)

Country Link
JP (1) JPS4953963A (en)
BE (1) BE804122A (en)
DE (1) DE2242284A1 (en)
FR (1) FR2197709B1 (en)
GB (1) GB1437980A (en)
IE (1) IE38129B1 (en)
IT (1) IT990325B (en)
LU (1) LU68312A1 (en)
NL (1) NL7311375A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2795995A1 (en) * 1999-07-08 2001-01-12 Plastiques De La Deome Adhesive film for wrapping palletized load has three layers of low density linear polyethylene each of specified grade and density

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BRPI0520393A2 (en) * 2005-06-01 2009-05-05 3M Innovative Properties Co film manipulation apparatus and method for controlling the cross-gauge profile of a polymeric film blanket
US11442208B2 (en) * 2017-05-17 2022-09-13 Everix, Inc. Ultra-thin, flexible thin-film filters with spatially or temporally varying optical properties and methods of making the same

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1429227A (en) * 1965-04-13 1966-02-18 Du Pont Method for improving the roll-up ability of polymeric organic films

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2795995A1 (en) * 1999-07-08 2001-01-12 Plastiques De La Deome Adhesive film for wrapping palletized load has three layers of low density linear polyethylene each of specified grade and density

Also Published As

Publication number Publication date
IE38129B1 (en) 1978-01-04
LU68312A1 (en) 1975-05-21
JPS4953963A (en) 1974-05-25
FR2197709B1 (en) 1978-05-26
IE38129L (en) 1974-02-28
FR2197709A1 (en) 1974-03-29
BE804122A (en) 1974-02-28
IT990325B (en) 1975-06-20
DE2242284A1 (en) 1974-03-21
NL7311375A (en) 1974-03-04

Similar Documents

Publication Publication Date Title
GB1395464A (en) Twin sheet thermoformer
ES408745A2 (en) Process and device for the stretching of plastics sheets
GB1437979A (en) Method and apparatus for continuously varying the cross-section of thermoplastic film webs
ES8702229A1 (en) Process for the manufacture of articles of high mechanical strength from thermoplastic synthetic resins
GB1437980A (en) Method and apparatus for continuously varying the cross-section of thermoplastic film webs
ES287138A1 (en) Method for preparing a resinant thinoplastic thin-oriented film (Machine-translation by Google Translate, not legally binding)
GB969005A (en) Method and apparatus for stretching beaded edge films
GB1455079A (en) Appatatus and method for embossing thermoplastic film
DE3665831D1 (en) Heat treating thermoplastic sheet materials for thermo-forming
GB1041893A (en) Method and apparatus for the production of a sheet material comprising a polypropylene layer and a polyethylene layer
US2719323A (en) Expansible film tensilizing apparatus
GB1419972A (en) Method and apparatus for stretching plastic material
GB1309419A (en) Reticulate sheet material and method and apparatus for manufac turing the same
US3823209A (en) Method of fusing together particulate,thermoplastic material on a substrate
SE7609842L (en) APPARATUS FOR ADJUSTING THE DISTRIBUTION OF PLASTIC MATERIAL IN THE MANUFACTURE OF PLASTIC CONTAINERS
GB1299274A (en) Process and device for coating air-permeable materials
GB1357527A (en) Manufacture of sheet material
GB1058200A (en) Improved apparatus for heating webs of material
ES355994A1 (en) Process and Apparatus for the Continuous Coating of Individual Supports
GB1096998A (en) Plastic laminates and cellular materials and processes for the production thereof
SU797891A1 (en) Method of cutting thermoplastic articles
GB1014938A (en) Method and apparatus for manufacture of cushioning material
GB1044772A (en) Improvements in or relating to the stretching of thermoplastic films
GB1418935A (en) Process for drying moulded gypsum articles and apparatus therefor
GB1013111A (en) Improvements in or relating to a method of forming foamed plastic products

Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee
PCNP Patent ceased through non-payment of renewal fee