GB809183A - Improvements in or relating to processes for influencing the molecular structure of plastics by irradiation, more especially with electrons - Google Patents

Improvements in or relating to processes for influencing the molecular structure of plastics by irradiation, more especially with electrons

Info

Publication number
GB809183A
GB809183A GB1056257A GB1056257A GB809183A GB 809183 A GB809183 A GB 809183A GB 1056257 A GB1056257 A GB 1056257A GB 1056257 A GB1056257 A GB 1056257A GB 809183 A GB809183 A GB 809183A
Authority
GB
United Kingdom
Prior art keywords
plastic
vacuum
strip
strips
chambers
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
GB1056257A
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.)
Siemens Schuckertwerke AG
Siemens AG
Original Assignee
Siemens Schuckertwerke AG
Siemens AG
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 Siemens Schuckertwerke AG, Siemens AG filed Critical Siemens Schuckertwerke AG
Publication of GB809183A publication Critical patent/GB809183A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J19/08—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor
    • B01J19/081—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor employing particle radiation or gamma-radiation
    • B01J19/085—Electron beams only
    • 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
    • B29C71/00—After-treatment of articles without altering their shape; Apparatus therefor
    • B29C71/04—After-treatment of articles without altering their shape; Apparatus therefor by wave energy or particle radiation, e.g. for curing or vulcanising preformed articles
    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21K—TECHNIQUES FOR HANDLING PARTICLES OR IONISING RADIATION NOT OTHERWISE PROVIDED FOR; IRRADIATION DEVICES; GAMMA RAY OR X-RAY MICROSCOPES
    • G21K5/00—Irradiation devices
    • G21K5/10—Irradiation devices with provision for relative movement of beam source and object to be irradiated
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J37/00—Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
    • H01J37/30—Electron-beam or ion-beam tubes for localised treatment of objects
    • 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
    • B29L2007/007—Narrow strips, e.g. ribbons, tapes, bands
    • 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
    • B29L2031/00—Other particular articles
    • B29L2031/001—Profiled members, e.g. beams, sections
    • B29L2031/003—Profiled members, e.g. beams, sections having a profiled transverse cross-section

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Analytical Chemistry (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Treatments Of Macromolecular Shaped Articles (AREA)
  • Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)

Abstract

<PICT:0809183/III/1> The molecular structure of plastics is influenced by treating the plastic in the form of strips, sheet, or other shape to irradiation in a high vacuum in which the electron source is disposed. A high energy radiation source is used whereby the sheet is passed quickly through the radiation zone, and the gases generated are released outside said zone. It is stated that side chains of polymer structure are disrupted forming 3-dimensional cross-linkages, but at high dosages, main chains are also broken, giving a brittle glass-like product. A suitable apparatus comprises a main vacuum chamber 12 having an electron source 19, and fore- and after-vacuum chambers 13, 14. A strip of plastic 10 passes through slots 15, 18 through the vacuum locks, the slots being sealed against external air pressure. Pumps operating at 10-4mm. Hg are connected to the vacuum chambers. The electron stream is focused by an aperture 20 to pass through an accelerator 11 and then through the plastic strip which scatters the electrons, and these are collected in a retarder collector mounted below the strip and consisting of a number of chambers 1 ... 7 maintained at potentials which decrease to 4 which is at the lowest potential. A Lenard window is avoided since the radiative source and the plastic strips are in the same vacuum space, thus avoiding power losses. The plastic strip is preferably precooled before entry; the process may be applied to elastomers or polymers. Strips up to 1 metre wide may be treated at the rate of 1 metre per second.
GB1056257A 1956-03-31 1957-04-01 Improvements in or relating to processes for influencing the molecular structure of plastics by irradiation, more especially with electrons Expired GB809183A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DES48216A DE1016853B (en) 1956-03-31 1956-03-31 Arrangement for influencing the molecular structure of plastics by irradiation, especially with electrons

Publications (1)

Publication Number Publication Date
GB809183A true GB809183A (en) 1959-02-18

Family

ID=7486759

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1056257A Expired GB809183A (en) 1956-03-31 1957-04-01 Improvements in or relating to processes for influencing the molecular structure of plastics by irradiation, more especially with electrons

Country Status (4)

Country Link
CH (1) CH372764A (en)
DE (1) DE1016853B (en)
FR (1) FR1178455A (en)
GB (1) GB809183A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2128105A1 (en) * 1971-03-05 1972-10-20 Naphtachimie Sa Tearable polyolefin film - by subjecting extruded film to ionising radiation in absence of oxygen and other reactive substances
EP1416514A1 (en) * 2002-10-28 2004-05-06 GAMMA-Service Produktbestrahlung GmbH Electron accelerator for treatment of tubular or elongated products

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2128105A1 (en) * 1971-03-05 1972-10-20 Naphtachimie Sa Tearable polyolefin film - by subjecting extruded film to ionising radiation in absence of oxygen and other reactive substances
EP1416514A1 (en) * 2002-10-28 2004-05-06 GAMMA-Service Produktbestrahlung GmbH Electron accelerator for treatment of tubular or elongated products

Also Published As

Publication number Publication date
DE1016853B (en) 1957-10-03
CH372764A (en) 1963-10-31
FR1178455A (en) 1959-05-11

Similar Documents

Publication Publication Date Title
GB1181100A (en) Polyoxyperfluoromethylene Compounds
ES434175A1 (en) Process for obtaining materials having low content of soluble elements for multiple applications
JPS57131374A (en) Plasma etching device
CA2047759A1 (en) Process and apparatus for waste gas treatment by multi-stage electron beam irradiation
US3418155A (en) Electron discharge control
Partridge Thermoluminescence in polymers
GB809183A (en) Improvements in or relating to processes for influencing the molecular structure of plastics by irradiation, more especially with electrons
Daniels et al. ‘After-effect’in Aqueous Solutions of Deoxyribonucleic Acid irradiated with X-Rays
KR100324081B1 (en) Cutting part coating method
Burlant et al. Effect of Radiation on P0lyacrylonitrile and Poly-α-methaerylonitrile
US3683179A (en) Means for irradiating materials
Mafune et al. Pair Formation of Phenol in the Vicinity of an Aqueous Solution Surface Studied by Means of Liquid Beam Multiphoton Ionization Mass Spectrometry
JPS53144891A (en) Method and apparatus for production of inorganic compound
Kabanov et al. Radiation-induced ionic graft copolymerization at room temperature
Hollahan Rare gas plasma polymerization of benzene at− 196 C
US3043760A (en) Method for producing bodies of preferably non-linear polyatomic synthetics
CH612595A5 (en) Process for conducting chemical reactions in the presence of electrical discharges
Štefečka et al. Atmospheric-pressure plasma treatment of ultrahigh molecular weight polyethylene fibers
JPS55101853A (en) Method of fabricating comparison electrode with fet
JPS62237733A (en) Oxidation and apparatus therefor
VONSIATSKII et al. Physicomechanical properties of polytetrafluorethylene treated by a high-frequency gas-discharge plasma
Migeotte Lines of methane at 7.7 μ in the solar spectrum
JPS57184224A (en) Microwave plasma treating method and its device
Koebke et al. Hyperon star matter
Novoselov et al. Thermoluminescence of a polyethylene surface after plasma treatment with a high-frequency glow discharge