GB751052A - Dimensional stabilization of oriented thermoplastic films - Google Patents

Dimensional stabilization of oriented thermoplastic films

Info

Publication number
GB751052A
GB751052A GB15910/54A GB1591054A GB751052A GB 751052 A GB751052 A GB 751052A GB 15910/54 A GB15910/54 A GB 15910/54A GB 1591054 A GB1591054 A GB 1591054A GB 751052 A GB751052 A GB 751052A
Authority
GB
United Kingdom
Prior art keywords
rollers
film
passed
entrapped
sets
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
GB15910/54A
Inventor
John William Mcintire
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.)
Dow Chemical Co
Original Assignee
Dow Chemical Co
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 Dow Chemical Co filed Critical Dow Chemical Co
Priority to GB15910/54A priority Critical patent/GB751052A/en
Publication of GB751052A publication Critical patent/GB751052A/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
    • B29C55/16—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets multiaxial biaxial simultaneously
    • 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 By String And By Release Of Stress In Plastics And The Like (AREA)

Abstract

<PICT:0751052/IV(a)/1> Tubular films of organic thermoplastic material which have been oriented by stretching are rendered dimensionally stable by inflating a portion of the running film between two sets of pinch rolls, subjecting the inflated portion to radiant heat evenly round its periphery, and maintaining the entrapped gas at constant presure by adjusting the distance between the two sets of pinch rolls. The treatment may be effected continuously with production or as an after-treatment. As shown in Fig. 1, a tube of vinylidene chloride copolymer is extruded downwardly into a cooling bath 12, passed through a warm bath 17 and stretched between rollers 19 and 20 all as described in Specification 656,735. The tube is then passed to rollers 22, the portion between rollers 20 and 22 having air entrapped therein and being subject to radiant heat from a number of axially disposed heating elements 25 enclosed in a cylindrical housing 23. As the temperature of the entrapped air rises, the position of rollers 22 mounted on movable support 27 is adjusted so as to maintain the pressure, and hence the width of the flattened film 32, constant. In an example, a film tubular film of oriented crystalline vinylidene chloride copolymer 14 in. in diameter is passed at 100 ft/min. through a heating chamber containing 15 1800-watt elements, the distance between rollers 19 and 20 being 12 ft. 6 in., additional supporting rollers (not shown) being provided. The product shows a marked reduction in residual shrinkage. Other suitable materials include other vinyl polymers and rubber hydrochloride.
GB15910/54A 1954-05-28 1954-05-28 Dimensional stabilization of oriented thermoplastic films Expired GB751052A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB15910/54A GB751052A (en) 1954-05-28 1954-05-28 Dimensional stabilization of oriented thermoplastic films

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB15910/54A GB751052A (en) 1954-05-28 1954-05-28 Dimensional stabilization of oriented thermoplastic films

Publications (1)

Publication Number Publication Date
GB751052A true GB751052A (en) 1956-06-27

Family

ID=10067753

Family Applications (1)

Application Number Title Priority Date Filing Date
GB15910/54A Expired GB751052A (en) 1954-05-28 1954-05-28 Dimensional stabilization of oriented thermoplastic films

Country Status (1)

Country Link
GB (1) GB751052A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1124228B (en) * 1955-05-06 1962-02-22 Du Pont Process for the production of dimensionally stable structures, in particular films, of high surface adhesion from low-pressure polyethylene
EP0873847A2 (en) * 1997-04-24 1998-10-28 Tecno Coating Engineering S.r.l. Plant for the production of plastic tubular films with a biaxial orientation and an in-line stabilisation phase
EP0990503A1 (en) * 1998-09-28 2000-04-05 WindmÀ¶ller & Hölscher Method of regulating the bubble diameter between feeding and nip rollers

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1124228B (en) * 1955-05-06 1962-02-22 Du Pont Process for the production of dimensionally stable structures, in particular films, of high surface adhesion from low-pressure polyethylene
EP0873847A2 (en) * 1997-04-24 1998-10-28 Tecno Coating Engineering S.r.l. Plant for the production of plastic tubular films with a biaxial orientation and an in-line stabilisation phase
EP0873847A3 (en) * 1997-04-24 1999-12-22 Tecno Coating Engineering S.r.l. Plant for the production of plastic tubular films with a biaxial orientation and an in-line stabilisation phase
EP0990503A1 (en) * 1998-09-28 2000-04-05 WindmÀ¶ller & Hölscher Method of regulating the bubble diameter between feeding and nip rollers

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