ES344668A1 - Improvements in Films. - Google Patents

Improvements in Films.

Info

Publication number
ES344668A1
ES344668A1 ES344668A ES344668A ES344668A1 ES 344668 A1 ES344668 A1 ES 344668A1 ES 344668 A ES344668 A ES 344668A ES 344668 A ES344668 A ES 344668A ES 344668 A1 ES344668 A1 ES 344668A1
Authority
ES
Spain
Prior art keywords
pores
length
polypropylene film
polypropylene
films
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
ES344668A
Other languages
Spanish (es)
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.)
Celanese Corp
Original Assignee
Celanese 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 Celanese Corp filed Critical Celanese Corp
Publication of ES344668A1 publication Critical patent/ES344668A1/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
    • B29C67/00—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00
    • B29C67/20—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00 for porous or cellular articles, e.g. of foam plastics, coarse-pored
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D67/00—Processes specially adapted for manufacturing semi-permeable membranes for separation processes or apparatus
    • B01D67/0002—Organic membrane manufacture
    • B01D67/0023—Organic membrane manufacture by inducing porosity into non porous precursor membranes
    • B01D67/0025—Organic membrane manufacture by inducing porosity into non porous precursor membranes by mechanical treatment, e.g. pore-stretching
    • B01D67/0027—Organic membrane manufacture by inducing porosity into non porous precursor membranes by mechanical treatment, e.g. pore-stretching by stretching
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D69/00—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
    • B01D69/02—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor characterised by their properties
    • 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
    • B29C48/0012—Combinations of extrusion moulding with other shaping operations combined with shaping by internal pressure generated in the material, e.g. foaming
    • 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
    • B29C48/03—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
    • 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
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/04—Condition, form or state of moulded material or of the material to be shaped cellular or porous

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)

Abstract

Porous films are made by the process of the parent Specification, modified in that the solidified extrudate is drawn down at a ratio of at least 20 : 1 and annealed and is thereafter stretched to increase its length by not more than 150%, followed by heating while restraining it against any greater shrinkage than 15% of its length. Polymers specified are polyethylene, polypropylene and polyoxymethylene. The product density is usually less than 95%, suitably 50-75% of that of the non-porous polymer, and has high N 2 , O 2 , CO 2 and water vapour transmittance. Pore size is generally 1000-2000A. A polypropylene film is claimed per se when it has pores, 20-50% of which are in this range. In one example the pores of a polypropylene film are filled with Ag, NaCl or nickel chloride-dimethylglyoxime.
ES344668A 1966-09-06 1967-08-31 Improvements in Films. Expired ES344668A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US57743966A 1966-09-06 1966-09-06

Publications (1)

Publication Number Publication Date
ES344668A1 true ES344668A1 (en) 1969-01-01

Family

ID=24308738

Family Applications (1)

Application Number Title Priority Date Filing Date
ES344668A Expired ES344668A1 (en) 1966-09-06 1967-08-31 Improvements in Films.

Country Status (13)

Country Link
AT (1) AT312911B (en)
BE (1) BE703379A (en)
CH (1) CH510704A (en)
DE (1) DE1704546B2 (en)
DK (1) DK123344B (en)
ES (1) ES344668A1 (en)
FI (1) FI50218C (en)
FR (1) FR1553757A (en)
GB (1) GB1180066A (en)
IL (1) IL28508A (en)
NL (1) NL6712145A (en)
NO (1) NO130787C (en)
SE (1) SE349255B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5215627A (en) * 1975-07-09 1977-02-05 Mitsubishi Rayon Co Ltd Porous polypropylene hollow fibers and a process for manufacturing the m
JPS61146308A (en) * 1984-12-21 1986-07-04 Ube Ind Ltd Preparation of porous polypropylene hollow yarn or film

Also Published As

Publication number Publication date
CH510704A (en) 1971-07-31
NO130787C (en) 1975-02-12
NL6712145A (en) 1968-03-07
NO130787B (en) 1974-11-04
BE703379A (en) 1968-03-01
DE1704546B2 (en) 1976-11-18
FR1553757A (en) 1969-01-17
DE1704546A1 (en) 1972-03-23
DK123344B (en) 1972-06-12
SE349255B (en) 1972-09-25
AT312911B (en) 1974-01-25
FI50218C (en) 1976-01-12
GB1180066A (en) 1970-02-04
FI50218B (en) 1975-09-30
IL28508A (en) 1971-10-20

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