US1881108A - Manufacture of sheets or films of compositions containing cellulose esters or ethers - Google Patents

Manufacture of sheets or films of compositions containing cellulose esters or ethers Download PDF

Info

Publication number
US1881108A
US1881108A US575938A US57593831A US1881108A US 1881108 A US1881108 A US 1881108A US 575938 A US575938 A US 575938A US 57593831 A US57593831 A US 57593831A US 1881108 A US1881108 A US 1881108A
Authority
US
United States
Prior art keywords
film
temperature
films
trough
manufacture
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 - Lifetime
Application number
US575938A
Other languages
English (en)
Inventor
Wickham Alfred Robert
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.)
Spicers Ltd
Original Assignee
Spicers Ltd
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 Spicers Ltd filed Critical Spicers Ltd
Application granted granted Critical
Publication of US1881108A publication Critical patent/US1881108A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • B29C71/00—After-treatment of articles without altering their shape; Apparatus therefor
    • 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
    • B01J16/00—Chemical processes in general for reacting liquids with non- particulate solids, e.g. sheet material; Apparatus specially adapted therefor
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined

Definitions

  • This treatment which is hereinafter referred tov as the maturing treatment, is for the purpose of removing electrostatic charge and traces of solvent from the film.
  • the maturing temperature is of the order of 100 F., and I have found that if the film is wound at the actualmaturing temperature, it takes several hours to cool down, owing to its low thermal conductivity. Further the film is in a comparatively soft condition as a result of the maturing treatment, and it is found that when the film is subsequently unwound in order to trim it, the edges of adj acent convolutionstend to stick'together, and the action ofparting themcauses an electrostatic charge to be'imparted to the film, which is highly undesirable. It is among the objects of the present invention to provide means whereby these disadvantagesmay be overcome.
  • This invention provides an improvement in or modification of that contained in the specification of H. J. Hands No. 238,150 filed 6th December, 1927, which consists in winding the film, immediately after the maturing treatment, in a space which is maintained at a temperature considerably below the maturing temperature.
  • the film is wound at a temperature which i l is approximately 40 F. below thematuring temperature.
  • the winding of the film may be effected in two stages, the temperature of the film being first of all reduced by winding at a temperature about 15 F. below the maturing temperature and then by a further 25F. by rewinding at the appropriate temperature.
  • the invention also provides apparatus for winding the film after the maturing treatment, which comprises a trough, means for winding the film on a spindle contained in said trough, and a cooling jacket surrounding the trough.
  • the jacket may conveniently be constituted by pipes through which cooling water is circulated.
  • the lid 4 is not provided with cooling pipes, as otherwise vapour would tend to condense thereon and drip on to the film.
  • the lid is therefore conveniently formed of two members having an air space between them.
  • the end walls of the trough are provided with vertical slots 5,, extending from the top of each wall to approximately half-way down the trough. These slots form bearlngs for a longitudinal spindle 6, on which the film 7 is wound, the spindle thus being easily removable fromthe L trough.
  • the spindle may conveniently be driven mechanically, either by a belt and pulleyor by suitable gearing.
  • the cold water inlet 8 for the jacket 3 is '85 arranged at the bottom of the trough, and the outlet 9 from the jacket is at the top.
  • the temperature within the trough is maintained at about 65 F.
  • a draw-ofi cock 10 is provided at the bottom of the trough to enable any condensate forming thereon to be removed. 1 i i y winding the film in the apparatus according to the invention, it ischanged from '1 the comparatively soft and unstable state in which it leaves the maturing process to a hard cool condition.
  • the film When the whole of the film has been wound on the spindle, the latter may be removed 100 from the trough. and may immediately be unwound. There'is, therefore, no need for the film to beleft for any length of time to cool, as was heretofore the case; nor is there any tendency for adjacent. convolutions of the film "to stick together when it is Wound upor for electrostatic charge to be generated.
  • a methodfor the manufacture of films of compositions containing an'organic de-V, rivativ-e of cellulose which comprises in com bination the steps of-applying' to atravelling surface asolution of the aforesaid composition, effecting evaporation of the solvent from-"said 'solution stripping from the surface the film of compositionleft thereon by 0 the evaporation of said solvent, maturing the film by leading it through a. space'maintained charged with water vapour at a temperature considerably abovev room 1 temperature, and immediately thereafter winding the film in a space which-is maintained at atemperature" V considerably below-that of the space in which the a-foresaidmaturing treatment is carried out.
  • a method for the manufacture of films 40 of compositions containing an organic de rivative of cellulose which comprises in com- 7 bination the stepsof applying to a travelling surface a solution of-the aforesaidcom position; effecting evaporation of the solvent I from said solution, stripping from the surface .the film .of composition left thereon by the evaporation of said solvent,rmaturing:the v i film b'y leading it through a space maintained V V chargedwith Water vapourat a temperature 5 considerably above room temperature, and immediately thereafter winding the film first at a temperature of about 15 F bel'ow, the temperature of the space in which the afore-- said maturingtreatment is carried out and then rewinding it at a temperature of about 409 below the maturing temperature. 7 In testimony whereof I aifix my signature. a ALFRED ROBERT WICKHAMQ

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Manufacture Of Macromolecular Shaped Articles (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Treatments Of Macromolecular Shaped Articles (AREA)
  • Moulding By Coating Moulds (AREA)
  • Treatment Of Fiber Materials (AREA)
US575938A 1926-12-23 1931-11-18 Manufacture of sheets or films of compositions containing cellulose esters or ethers Expired - Lifetime US1881108A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB32582/26A GB287635A (en) 1926-12-23 1926-12-23 Improvements in or relating to the manufacture of sheets or films of compositions containing cellulose esters or ethers

Publications (1)

Publication Number Publication Date
US1881108A true US1881108A (en) 1932-10-04

Family

ID=10340875

Family Applications (1)

Application Number Title Priority Date Filing Date
US575938A Expired - Lifetime US1881108A (en) 1926-12-23 1931-11-18 Manufacture of sheets or films of compositions containing cellulose esters or ethers

Country Status (6)

Country Link
US (1) US1881108A (fr)
BE (1) BE347045A (fr)
DE (2) DE537745C (fr)
FR (2) FR645912A (fr)
GB (1) GB287635A (fr)
NL (1) NL23810C (fr)

Also Published As

Publication number Publication date
NL23810C (fr) 1900-01-01
GB287635A (en) 1928-03-23
FR645912A (fr) 1928-11-03
BE347045A (fr) 1900-01-01
DE599031C (de) 1934-06-23
FR41709E (fr) 1933-03-29
DE537745C (de) 1931-11-06

Similar Documents

Publication Publication Date Title
US1881108A (en) Manufacture of sheets or films of compositions containing cellulose esters or ethers
CH180742A (de) Apparatur zur Herstellung von blatt- oder bandförmigem Material unter Aufrechterhaltung der gewünschten Stärke desselben.
US2200982A (en) Method for crystallizing fats
GB415346A (en) An improved process and apparatus for mechanically producing coarse crystalline deposits
US1975132A (en) Manufacture of sheets or films of cellulose material
US1239766A (en) Process of drying casein.
US1911926A (en) Cleaning bath employing volatile solvents
US1865218A (en) Apparatus for treating rolled fabric
US1154447A (en) Impregnating apparatus.
GB369610A (en) Improvements in or relating to the manufacture of sheets or films of compositions containing cellulose esters or ethers
SU99274A1 (ru) Устройство дл удалени излишка олова с облуженных металлических изделий
US1752972A (en) Impregnating paper for insulation of electric cables and apparatus therefor
DE816946C (de) Verfahren und Vorrichtung zum Eindicken von Fluessigkeiten, insbesondere Milch
FR777297A (fr) Procédé de régulation de la température d'une enceinte en fonction d'une autre température variable
US326687A (en) Edward gilbert sparks
GB305726A (en) Method and apparatus for drying and conditioning photographic and cinematograph films or bands
US1650585A (en) Transparent-paper machine
US1804023A (en) Means for making tubes of celluloid and the like
US1851759A (en) Means for removing scale deposits in steam boilers, feed water heaters, and the like
SU149677A1 (ru) Конвейерный фотосушильный агрегат
US834265A (en) Dehydrating apparatus.
GB344645A (en) Device for the evaporation of the solvents in the manufacture of papers and films from cellulose esters and ethers
FR731404A (fr) Procédé pour la fabrication de revêtements de tous genres
GB191209251A (en) A Refrigerator for use in the Manufacture of Chocolates.
FR757384A (fr) Procédé de revêtement de parois de locaux