GB1177459A - Improvements in or relating to the Production of Thermoplastic Synthetic Resin Film. - Google Patents

Improvements in or relating to the Production of Thermoplastic Synthetic Resin Film.

Info

Publication number
GB1177459A
GB1177459A GB37202/68A GB3720268A GB1177459A GB 1177459 A GB1177459 A GB 1177459A GB 37202/68 A GB37202/68 A GB 37202/68A GB 3720268 A GB3720268 A GB 3720268A GB 1177459 A GB1177459 A GB 1177459A
Authority
GB
United Kingdom
Prior art keywords
extrusion
projections
die
film
lips
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
GB37202/68A
Inventor
Jiri Svoboda
Josef Holomek
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.)
Reifenhauser KG
Original Assignee
Reifenhauser KG
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 Reifenhauser KG filed Critical Reifenhauser KG
Publication of GB1177459A publication Critical patent/GB1177459A/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
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/30—Extrusion nozzles or dies
    • B29C48/305—Extrusion nozzles or dies having a wide opening, e.g. for forming 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
    • 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
    • B29C48/07—Flat, e.g. panels
    • B29C48/08—Flat, e.g. panels flexible, e.g. films
    • 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
    • B29C48/15—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor incorporating preformed parts or layers, e.g. extrusion moulding around inserts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0037—Other properties
    • B29K2995/0072—Roughness, e.g. anti-slip
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2007/00—Flat articles, e.g. films or sheets
    • B29L2007/001—Flat articles, e.g. films or sheets having irregular or rough surfaces

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)

Abstract

1,177,459. Flat films having parallel striations; extrusion dies. REIFENHAUSER K.G. 5 Aug., 1968 [7 Aug., 1967], No. 37202/68. Headings B5A and B5B. An apparatus for extruding thermoplastic synthetic organic polymeric material to form flat film comprises a screw extruder provided with an extrusion die having an elongated slot extrusion orifice characterized in that each of the lips of the extrusion orifice, instead of being plain, is provided with a row of projections directed towards the opposite lip, the height of the projections being about “ to 1/3 the distance between the lips of the extrusion orifice. As shown in Figs. 1 and 2, a film 1 is melt extruded through the slot-shaped extrusion orifice 6 having a width 5 of an extrusion die 4, the molten film material being forced through the die by the screw extruder 2, 3. As shown in Figs. 2 and 3, the lips of the extrusion orifice 6 are serrated, so that projections 7 and 8 project from the lips of the die orifice towards one another and form grooves in the film, the overall thickness of which is determined by the dimension 5. Owing to surface tension effects acting on the still molten film immediately after it leaves the die, the grooves formed on both surfaces of the freshly formed film largely disappear, but the final solidified film nevertheless has parallel longitudinal striations on both surfaces. As shown in Fig. 3, the projections 7 and 8 are of sawtooth form, but alternatively they may be sinusoidal. The projections 7 and 8 may have sloping rear faces 11, the height of the projections thus increases from zero to a maximum at the outlet of the extrusion duet where the film leaves the extrusion head. The projections 7 and 8 may be formed along the opposing edges of a pair of members 12 and 13, detachably mounted on the face of the die parallel to the length of the extrusion slot, the opposing edges of the members constituting the lips of the die.
GB37202/68A 1967-08-07 1968-08-05 Improvements in or relating to the Production of Thermoplastic Synthetic Resin Film. Expired GB1177459A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CS566567 1967-08-07

Publications (1)

Publication Number Publication Date
GB1177459A true GB1177459A (en) 1970-01-14

Family

ID=5401919

Family Applications (1)

Application Number Title Priority Date Filing Date
GB37202/68A Expired GB1177459A (en) 1967-08-07 1968-08-05 Improvements in or relating to the Production of Thermoplastic Synthetic Resin Film.

Country Status (3)

Country Link
DE (1) DE1779235C3 (en)
FR (1) FR1578334A (en)
GB (1) GB1177459A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2778867A1 (en) * 1998-05-21 1999-11-26 Gmp Co Ltd Laminate film e.g. thermoplastic film or coating for lamination onto target film

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2346142A1 (en) * 1976-03-29 1977-10-28 Saint Gobain Wide-slot die for thermoplastics profiled film for safety glass - has profiles in discharge zone e.g. flutings or milled edges
JPS57150532A (en) * 1981-03-12 1982-09-17 Mitsubishi Monsanto Chem Co Intermediate membrane made of thermoplastic resin
AU621471B2 (en) * 1989-03-31 1992-03-12 Sekisui Kagaku Kogyo Kabushiki Kaisha A method for the manufacture of thermoplastic resin sheets

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2778867A1 (en) * 1998-05-21 1999-11-26 Gmp Co Ltd Laminate film e.g. thermoplastic film or coating for lamination onto target film

Also Published As

Publication number Publication date
DE1779235C3 (en) 1974-09-26
DE1779235A1 (en) 1972-02-17
DE1779235B2 (en) 1972-08-03
FR1578334A (en) 1969-08-14

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