DE516715C - Casting base for the production of foils of any thickness - Google Patents

Casting base for the production of foils of any thickness

Info

Publication number
DE516715C
DE516715C DEI30911D DEI0030911D DE516715C DE 516715 C DE516715 C DE 516715C DE I30911 D DEI30911 D DE I30911D DE I0030911 D DEI0030911 D DE I0030911D DE 516715 C DE516715 C DE 516715C
Authority
DE
Germany
Prior art keywords
casting
production
solvents
thickness
foils
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
DEI30911D
Other languages
German (de)
Inventor
Dr Leopold Eckler
Dr Werner Gladhorn
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.)
IG Farbenindustrie AG
Original Assignee
IG Farbenindustrie 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 IG Farbenindustrie AG filed Critical IG Farbenindustrie AG
Priority to DEI30911D priority Critical patent/DE516715C/en
Application granted granted Critical
Publication of DE516715C publication Critical patent/DE516715C/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
    • B29C41/00—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor
    • B29C41/24—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor for making articles of indefinite length

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Moulding By Coating Moulds (AREA)

Description

Gießunterlage für die Herstellung von Folien jeder Stärke Im Patent 5 z q. 878 wurde dargetan, welche Schwierigkeiten sich ergeben beim Gießen von Folien jeder Stärke aus in organischen Lösungsmitteln gelösten Stoffen auf einer Unterlage aus einer Schicht von Gellulosederivaten. Es wurde dort vorgeschlagen, eine Gießunterlage aus Cellulosederivaten zu verwenden, die durch geeignete Behandlung, insbesondere durch Verseifung oder durch Reduktion, oberflächlich so weit verändert wird, daß sie in den Lösungsmitteln der Gießlösung weder quellbar noch löslich ist.Casting base for the production of foils of any thickness In the patent 5 z q. In 878 it was demonstrated what difficulties arise when casting foils any starch made from substances dissolved in organic solvents on a pad from a layer of cellulose derivatives. It was suggested there, a casting pad to use from cellulose derivatives, by appropriate treatment, in particular by saponification or by reduction, is superficially changed to such an extent that it is neither swellable nor soluble in the solvents of the casting solution.

Es wurde nun gefunden, daß man diese Gießunterlagen noch erheblich verbessern kann, wenn man von vornherein zu ihrer Herstellung Lösungen von solchen Cellulosederivaten verwendet, welche mindestens eine freie Hydroxylgruppe auf das Molekül C6 H10 0s enthalten und von vornherein in den Lösungsmitteln der auf der Gießunterlage zu vergießenden Filmgießlösungen unlöslich sind.It has now been found that these casting bases can still be used considerably It can improve if one starts with the production of such solutions Cellulose derivatives used, which have at least one free hydroxyl group on the Molecule C6 H10 0s contained and from the outset in the solvents of the Casting base to be cast film casting solutions are insoluble.

Wenn eine derartige Unterlage nach dem Verfahren des Hauptpatents durch Verseifung, Redaktion o. dgl. oberflächlich noch so weit verändert wird, daß sie in den Lösungsmitteln der anzuwendenden Gießlösungen nicht mehr quellbar ist, so erhält man eine Unterlage, die aus zwei innig miteinander verbundenen Schichten besteht, von denen nicht nur die ,obere, sondern auch die untere eine hervorragende Widerstandsfähigkeit gegen Ein-,virkungen der Lösungsmittel der Gießlösungen besitzen. Beispiel Zum Vergießen einer Lösung aus Acetylcellulosie wird die Oberfläche der Gießtrommel mit einem Überzug von Nitrocellulose (8% Stickstoffgehalt), gelöst in einem Gemisch von Aceton, Äthylenchlorhydrin und Wasser versehen. Dieser Überzug wird so lange mit einer konzentrierten wäßrigen Lösung von Natriumsulfhydrat behandelt, bis er in den in Frage kommenden Lösungsmitteln nicht mehr quillt. Dann wird die Schicht mit Wasser ausgewaschen.If such a document is made according to the procedure of the main patent by saponification, editing or the like is superficially changed to such an extent that it is no longer swellable in the solvents of the casting solutions to be used, in this way a base is obtained which consists of two intimately connected layers consists, of which not only the, upper, but also the lower one is an excellent one Have resistance to the effects of the solvents in the casting solutions. Example For pouring a solution of acetyl cellulose, the surface of the Casting drum with a coating of nitrocellulose (8% nitrogen content) dissolved in a mixture of acetone, ethylene chlorohydrin and water. This coating is treated with a concentrated aqueous solution of sodium sulfhydrate for so long until it no longer swells in the solvents in question. Then the Layer washed out with water.

Claims (1)

PATEN TANSYRUCH: Gießunterlage für die Herstellung von Folien jeder Stärke aus in organischen Lösungsmitteln gelösten Stoffen, Zusatz zum Patent 514878, dadurch gekennzeichnet, daß sie aus Cellulösederiväten, die mindestens :eine freie Hydroxylgruppe auf das Molekül C6 H10 05 enthalten und in dien Lösungsmitteln der Gießlösung unlöslich sind, besteht und .oberflächlich nach dem Verfahren des Hauptpatents 514878 bis zur Unquellbarkeit in den Lösungsmitteln der Gießlösung verändert ist. PATEN TANSYRUCH: Casting base for the production of films of any thickness from substances dissolved in organic solvents, addition to patent 514878, characterized in that it is made from cellulose derivatives that contain at least: one free hydroxyl group on the C6 H10 05 molecule and in the solvents of the casting solution are insoluble, exists and .surface is changed according to the process of the main patent 514878 to the point of non-swellability in the solvents of the casting solution.
DEI30911D 1927-04-10 1927-04-10 Casting base for the production of foils of any thickness Expired DE516715C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEI30911D DE516715C (en) 1927-04-10 1927-04-10 Casting base for the production of foils of any thickness

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEI30911D DE516715C (en) 1927-04-10 1927-04-10 Casting base for the production of foils of any thickness

Publications (1)

Publication Number Publication Date
DE516715C true DE516715C (en) 1935-02-16

Family

ID=7187741

Family Applications (1)

Application Number Title Priority Date Filing Date
DEI30911D Expired DE516715C (en) 1927-04-10 1927-04-10 Casting base for the production of foils of any thickness

Country Status (1)

Country Link
DE (1) DE516715C (en)

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