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GB1174117A - Method for Flattening Thermoplastic Web - Google Patents

Method for Flattening Thermoplastic Web

Info

Publication number
GB1174117A
GB1174117A GB3341/67A GB334167A GB1174117A GB 1174117 A GB1174117 A GB 1174117A GB 3341/67 A GB3341/67 A GB 3341/67A GB 334167 A GB334167 A GB 334167A GB 1174117 A GB1174117 A GB 1174117A
Authority
GB
United Kingdom
Prior art keywords
webs
tube
alternate sides
web
passing
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
GB3341/67A
Inventor
Arthur Art Eng
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.)
Union Carbide Corp
Original Assignee
Union Carbide Corp
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 Union Carbide Corp filed Critical Union Carbide Corp
Priority to GB3341/67A priority Critical patent/GB1174117A/en
Publication of GB1174117A publication Critical patent/GB1174117A/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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • B29C48/0022—Combinations of extrusion moulding with other shaping operations combined with cutting
    • 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
    • B29C2793/0063—Cutting longitudinally
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • B29C48/0018—Combinations of extrusion moulding with other shaping operations combined with shaping by orienting, stretching or shrinking, e.g. film blowing
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • B29C48/0019—Combinations of extrusion moulding with other shaping operations combined with shaping by flattening, folding or bending
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
    • B29C48/10—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels flexible, e.g. blown foils

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)

Abstract

1,174,117. Forming flat wrinkle-free webs. UNION CARBIDE CORP. 23 Jan., 1967, No. 3341/67. Heading B5B. Flat wrinkle-free webs are formed from extruded unoriented or oriented thermoplastic tube by longitudinally slitting the tube, while in inflated form, into a plurality of webs, separately passing each of the webs under tension and out of contact with each other around alternate sides of a series of adjacent rolls separated from each other by a distance greater than the thickness of the web passing therearound and concurrently heating each of the webs as it passes around the rolls to a temperature in a range extending from the heat distortion temperature of the material at 66 p.s.i. to 60‹ C. thereabove. Specified web materials include polymethacrylate, polyolefins, polystyrene polyethers and polysulphones. The web may be oriented before passage on alternate sides of the axes of the adjacent rolls, longitudinally stretched as it passes around the rollers. A plurality of webs may be passed separately on alternate sides of the axes of adjacent rolls to flatten the webs. The tube may be bisoriented before being slit, either passing directly from extrusion to biorientation or from extrusion over a mandrel of larger periphery than of the tube while being cooled to a self-sustaining condition before being. slit.
GB3341/67A 1967-01-23 1967-01-23 Method for Flattening Thermoplastic Web Expired GB1174117A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3341/67A GB1174117A (en) 1967-01-23 1967-01-23 Method for Flattening Thermoplastic Web

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3341/67A GB1174117A (en) 1967-01-23 1967-01-23 Method for Flattening Thermoplastic Web

Publications (1)

Publication Number Publication Date
GB1174117A true GB1174117A (en) 1969-12-10

Family

ID=9756497

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3341/67A Expired GB1174117A (en) 1967-01-23 1967-01-23 Method for Flattening Thermoplastic Web

Country Status (1)

Country Link
GB (1) GB1174117A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4041526A1 (en) * 2019-10-11 2022-08-17 Windmöller & Hölscher KG Method for starting or terminating production of a film in a film machine, film machine and computer program product

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4041526A1 (en) * 2019-10-11 2022-08-17 Windmöller & Hölscher KG Method for starting or terminating production of a film in a film machine, film machine and computer program product

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee