IE34177B1 - Process for the manufacture of tubular film having at least one longitudinal lane in which the wall thickness of the film is greater than the wall thickness of the remainder of the tubular film - Google Patents

Process for the manufacture of tubular film having at least one longitudinal lane in which the wall thickness of the film is greater than the wall thickness of the remainder of the tubular film

Info

Publication number
IE34177B1
IE34177B1 IE1407/69A IE140769A IE34177B1 IE 34177 B1 IE34177 B1 IE 34177B1 IE 1407/69 A IE1407/69 A IE 1407/69A IE 140769 A IE140769 A IE 140769A IE 34177 B1 IE34177 B1 IE 34177B1
Authority
IE
Ireland
Prior art keywords
film
wall thickness
tubular film
remainder
cooling
Prior art date
Application number
IE1407/69A
Other versions
IE34177L (en
Original Assignee
Voor Techno Commerciele Signal
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 Voor Techno Commerciele Signal filed Critical Voor Techno Commerciele Signal
Publication of IE34177L publication Critical patent/IE34177L/en
Publication of IE34177B1 publication Critical patent/IE34177B1/en

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
    • B29C48/03—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
    • 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

Abstract

1,250,945. Locally thickened tubular film. VOOR TECHNO - COMMERCIELE SIGNALISATIE, IN HET KORT N.V. 16 Oct., 1969 [28 Aug., 1969], No. 50836/69. Heading B5B. A synthetic organic thermoplastic tubular film having at least one longitudinal zone of which the wall thickness is greater than that of the remainder of the film is made by melt extruding the tube from an annular die, subjecting the tube to primary cooling and inflating it, and locally cooling at least one longitudinal zone of the inflated and still plastic film to solidify this zone before cooling the remainder of the film. Cooling may be by a jet of pressurized air, the temperature and pressure of which are adjustable. Two opposite zones on the film may be cooled to equilibrate stresses. [GB1250945A]
IE1407/69A 1969-08-28 1969-10-10 Process for the manufacture of tubular film having at least one longitudinal lane in which the wall thickness of the film is greater than the wall thickness of the remainder of the tubular film IE34177B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
BE49445 1969-08-28

Publications (2)

Publication Number Publication Date
IE34177L IE34177L (en) 1971-02-28
IE34177B1 true IE34177B1 (en) 1975-03-05

Family

ID=3840758

Family Applications (1)

Application Number Title Priority Date Filing Date
IE1407/69A IE34177B1 (en) 1969-08-28 1969-10-10 Process for the manufacture of tubular film having at least one longitudinal lane in which the wall thickness of the film is greater than the wall thickness of the remainder of the tubular film

Country Status (2)

Country Link
GB (1) GB1250945A (en)
IE (1) IE34177B1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4443400A (en) * 1982-08-11 1984-04-17 Mobil Oil Corporation Method and apparatus for the formation of profiled thermoplastic film

Also Published As

Publication number Publication date
IE34177L (en) 1971-02-28
GB1250945A (en) 1971-10-27

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