GB989513A - - Google Patents

Info

Publication number
GB989513A
GB989513A GB20102/62A GB2010262A GB989513A GB 989513 A GB989513 A GB 989513A GB 20102/62 A GB20102/62 A GB 20102/62A GB 2010262 A GB2010262 A GB 2010262A GB 989513 A GB989513 A GB 989513A
Authority
GB
United Kingdom
Prior art keywords
balloon
film
casing
dispersion
linked
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
GB20102/62A
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.)
WR Grace and Co
Original Assignee
WR Grace and 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
Priority claimed from US112430A external-priority patent/US3149017A/en
Application filed by WR Grace and Co filed Critical WR Grace and Co
Publication of GB989513A publication Critical patent/GB989513A/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
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/22—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of indefinite length
    • 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
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/0005—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor characterised by the material
    • 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
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/02—Combined blow-moulding and manufacture of the preform or the parison
    • B29C49/06905—Using combined techniques for making the preform
    • B29C49/0691—Using combined techniques for making the preform using sheet like material, e.g. sheet blow-moulding from joined sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D22/00—Producing hollow articles
    • B29D22/02—Inflatable articles

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Toys (AREA)
  • Processes Of Treating Macromolecular Substances (AREA)

Abstract

989,513. Biaxially orienting polyolefine film. W. R. GRACE & CO. May 24, 1962 [May 24, 1961 (2); June 1, 1961], No. 20102/62. Drawings to Specification. Heading B5B. [Also in Division B7] A cross-linked, biaxially oriented polyolefine casing comprises two or more seamless pieces of polyolefin film which have been joined by heat sealing, said film having in its oriented state a tensile strength of at least 4000 1b. per square inch at 25‹ C., a shrink energy of at least 100 pounds per square inch in each direction at 96‹ C., and a thickness of 0.25 to 5 mils. The casing may be in the form of a balloon which may be placed within a like balloon with the seams out of register and then " cold racked," i.e. inflated with air at ambient temperature until a back pressure is observed, and the back pressure maintained by the continued introduction of air into the balloon, thereby compensating for the stress relaxation of the balloon. The balloon is normally inflated in this manner to about 80% of its bursting pressure. The interior of the balloon may be coated with a dispersion of finely divided carbon black with a solid organic polymer by wetting the inner surface of the balloon a dispersion of the carbon black in a solution of the polymer in a volatile solvent, and evaporating the solvent from the film of the dispersion adhering to the inner surface of the balloon. Alternatively the interior of the balloon may be dusted with a finely divided metal, the metal particles adhering by electrostatic forces to the film. The film may be cross-linked by irradiation with 2 to 20, preferably 6 to 20, megarads of high energy ionizing radiation. The casing or balloon may be biaxially oriented by exerting within it a fluid pressure while maintaining a temperature 1‹ to 35‹ C. above the transition temperature to impart at least 100% increase in area, the casing or balloon being freely suspended in a gaseous atmosphere during the orienting, and the casing or balloon being cooled to below the transition temperature while maintaining the internal fluid pressure. The casings of the invention are particularly suitable for meteorological balloons.
GB20102/62A 1961-05-24 1962-05-24 Expired GB989513A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US11218361A 1961-05-24 1961-05-24
US112430A US3149017A (en) 1961-05-24 1961-05-24 Polyethylene balloon
US11493761A 1961-06-01 1961-06-01

Publications (1)

Publication Number Publication Date
GB989513A true GB989513A (en) 1965-04-22

Family

ID=37076103

Family Applications (1)

Application Number Title Priority Date Filing Date
GB20102/62A Expired GB989513A (en) 1961-05-24 1962-05-24

Country Status (5)

Country Link
BE (1) BE617992A (en)
BR (1) BR6239262D0 (en)
FR (1) FR1327377A (en)
GB (1) GB989513A (en)
NL (1) NL278641A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2311661A1 (en) * 1975-05-22 1976-12-17 Grace W R Ltd PROCESS FOR IMPROVING THE RESISTANCE TO DESTRATIFICATION OF A STRETCHED FILM LAMINATE
EP2418226A1 (en) * 2003-06-26 2012-02-15 Advanced Technology Materials, Inc. Polytetrafluoroethylene treatment

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU719458B2 (en) * 1997-10-30 2000-05-11 Yoshino Kogyosho Co., Ltd. Thin-walled synthetic resin laminated body for liquid container and method for manufacturing the same

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2311661A1 (en) * 1975-05-22 1976-12-17 Grace W R Ltd PROCESS FOR IMPROVING THE RESISTANCE TO DESTRATIFICATION OF A STRETCHED FILM LAMINATE
EP2418226A1 (en) * 2003-06-26 2012-02-15 Advanced Technology Materials, Inc. Polytetrafluoroethylene treatment

Also Published As

Publication number Publication date
BE617992A (en)
BR6239262D0 (en) 1973-12-04
FR1327377A (en) 1963-05-17
NL278641A (en)

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