CH239014A - Process for the manufacture of highly elastic molded structures from polyvinyl chloride. - Google Patents
Process for the manufacture of highly elastic molded structures from polyvinyl chloride.Info
- Publication number
- CH239014A CH239014A CH239014DA CH239014A CH 239014 A CH239014 A CH 239014A CH 239014D A CH239014D A CH 239014DA CH 239014 A CH239014 A CH 239014A
- Authority
- CH
- Switzerland
- Prior art keywords
- polyvinyl chloride
- highly elastic
- dependent
- manufacture
- pressing
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims description 13
- 229920000915 polyvinyl chloride Polymers 0.000 title claims description 12
- 239000004800 polyvinyl chloride Substances 0.000 title claims description 12
- 238000004519 manufacturing process Methods 0.000 title claims description 5
- 239000004014 plasticizer Substances 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 4
- 238000003825 pressing Methods 0.000 claims description 4
- 238000001746 injection moulding Methods 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 230000001419 dependent effect Effects 0.000 claims 4
- 238000002347 injection Methods 0.000 claims 1
- 239000007924 injection Substances 0.000 claims 1
- 230000002522 swelling effect Effects 0.000 claims 1
- 239000000463 material Substances 0.000 description 4
- LQNUZADURLCDLV-UHFFFAOYSA-N nitrobenzene Chemical compound [O-][N+](=O)C1=CC=CC=C1 LQNUZADURLCDLV-UHFFFAOYSA-N 0.000 description 4
- CXWXQJXEFPUFDZ-UHFFFAOYSA-N tetralin Chemical compound C1=CC=C2CCCCC2=C1 CXWXQJXEFPUFDZ-UHFFFAOYSA-N 0.000 description 3
- SMWDFEZZVXVKRB-UHFFFAOYSA-N Quinoline Chemical compound N1=CC=CC2=CC=CC=C21 SMWDFEZZVXVKRB-UHFFFAOYSA-N 0.000 description 2
- MHDVGSVTJDSBDK-UHFFFAOYSA-N dibenzyl ether Chemical compound C=1C=CC=CC=1COCC1=CC=CC=C1 MHDVGSVTJDSBDK-UHFFFAOYSA-N 0.000 description 2
- DOIRQSBPFJWKBE-UHFFFAOYSA-N dibutyl phthalate Chemical compound CCCCOC(=O)C1=CC=CC=C1C(=O)OCCCC DOIRQSBPFJWKBE-UHFFFAOYSA-N 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 229910019142 PO4 Inorganic materials 0.000 description 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- -1 gresol Chemical compound 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/02—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D01F6/08—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds from polymers of halogenated hydrocarbons
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
Description
Verfahren zur Herstellung hochelastischer geformter Gebilde aus Polyvinylehlorid. Die Herstellung von Fäden, Bändern, Schläuchen und dergleichen aus Polyvinyl- chlorid/Weichmachergemischen im Spritz- oder Pressverfahren ist schon längere.Zeit be kannt. Diese Produkte haben jedoch den Nachteil s chlechter Elastizität und grosser bleibender Dehnung.
Es wurde nun gefunden, dass die elasti schen Eigenschaften von gespritzten oder ge pressten Gebilden, wie Fäden, Bändern oder dünnwandigen Schläuchen, aus einer geeigne ten Pmlyvinylchlorid/Weichmachermischung hergestellt, weitgehend verbessert werden können, wenn die Gebilde in warmem Zu stand gestreckt werden. Durch die Streckung wird die bleibende Dehnung wesentlich ver kleinert.
Die Streckoperation kann nun an ver schiedenen Stadien der Fabrikation vorge nommen werden, entweder gleich beim Ver lassen der Düse, wobei die zur plastischen Verformung nötige Wärme ausgenützt wird, oder später als Sonderoperation eingeschaltet. Das Strecken des Polyvinylchlorid-Materials kann an der Luft oder in einem leicht regu lierbaren flüssigen Bad durchgeführt werden.
Als Badflüssigkeit haben sich solche Stoffe als vorteilhaft erwiesen, die eine geringe Quellung des Polyvinylchlorid-Stranges her beiführen, wie zum Beispiel Nitrobenzol, Chinolin, gresol, Tetralin, Trikresyiphosphat, Dibenzyläther.
Je nach dem Polymerisationsgrad des Polyvinylchlorids und der Weichmacherart kann -der Weichmachergehalt zwischen 40 und 60 % variieren.
Neben reinem hochpolymerem Vinyl- chlorid können ebenfalls Mischpolymerisate ganz öder teilweise verwendet werden.
<I>Beispiel:</I> 55 Teile hochmolekulares Polyvinyl- chlorid und 45 Teile Dibutylphtalat werden gut vermengt und durch Erhitzen auf zirka 170 C während 30' gelatiniert. Das gelati nierte Material wird nun in eine Pressform mit einer Düse von 2 mm fö eingefüllt. Die Temperatur der Pressform beträgt l70 C. Die Temperatur -der Düse wird bei zirka. 200 C konstant gehalten.
Nachdem das ein gefüllte Material die Temperatur der Press- form angenommen hat, wird durch kräftigen Druck bei geschlossener Düse das Polyvinyl- chlorid-bZaterial zusammengepresst und durch Druckentlastung entlüftet. Nach dem Off nen der Düse fliesst unter kleinem Drucl,: ein feiner klarer Faden. Dieser wird unter vorsichtiger Streckung von zirka 2,5 mm Q) auf zirka 1,5 mm 0 ausgezogen und mit Wasser gekühlt und aufgewickelt.
In einer Nachbehandlung wird der Faden durch ein Bad von Nitrobenzol, das auf zirka 100 erhitzt wurde, gezogen und nach kurzer Luftkühlung unter Zug getrocknet. Es ent steht ein hochelastischer Faden mit zirka 1,3 mm fö.
Process for the production of highly elastic molded structures from polyvinyl chloride. The manufacture of threads, tapes, hoses and the like from polyvinyl chloride / plasticizer mixtures by injection molding or pressing has been known for a long time. However, these products have the disadvantage of poor elasticity and great permanent elongation.
It has now been found that the elastic properties of injection-molded or pressed structures, such as threads, tapes or thin-walled hoses, made from a suitable Pmlyvinylchlorid / plasticizer mixture, can be largely improved if the structures are stretched while they are warm. Due to the stretching, the permanent elongation is significantly reduced.
The stretching operation can now be carried out at various stages of manufacture, either immediately when the nozzle is left, using the heat required for plastic deformation, or switched on later as a special operation. The stretching of the polyvinyl chloride material can be carried out in air or in an easily controllable liquid bath.
Substances which have proven to be advantageous as bath fluids are those which cause the polyvinyl chloride strand to swell slightly, such as nitrobenzene, quinoline, gresol, tetralin, tricryl phosphate, dibenzyl ether.
Depending on the degree of polymerization of the polyvinyl chloride and the type of plasticizer, the plasticizer content can vary between 40 and 60%.
In addition to pure high-polymer vinyl chloride, mixed polymers can also be used in whole or in part.
<I> Example: </I> 55 parts of high molecular weight polyvinyl chloride and 45 parts of dibutyl phthalate are mixed well and gelatinized by heating to around 170 C for 30 minutes. The gelled material is then poured into a mold with a nozzle of 2 mm fö. The temperature of the die is 170 C. The temperature of the nozzle is approx. 200 C kept constant.
After the filled material has assumed the temperature of the mold, the polyvinyl chloride material is pressed together with the nozzle closed with strong pressure and de-aerated by releasing the pressure. After opening the nozzle, a fine, clear thread flows under slight pressure. This is pulled out with careful stretching from about 2.5 mm Q) to about 1.5 mm O, cooled with water and wound up.
In an aftertreatment, the thread is pulled through a bath of nitrobenzene that has been heated to around 100 and, after brief air cooling, is dried under tension. The result is a highly elastic thread with about 1.3 mm fo.
Claims (1)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH239014T | 1943-12-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CH239014A true CH239014A (en) | 1945-09-15 |
Family
ID=4460967
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CH239014D CH239014A (en) | 1943-12-08 | 1943-12-08 | Process for the manufacture of highly elastic molded structures from polyvinyl chloride. |
Country Status (1)
| Country | Link |
|---|---|
| CH (1) | CH239014A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE974749C (en) * | 1951-10-09 | 1961-04-27 | Phrix Werke Ag | Process for the production of threads or the like from acrylonitrile polymers |
-
1943
- 1943-12-08 CH CH239014D patent/CH239014A/en unknown
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE974749C (en) * | 1951-10-09 | 1961-04-27 | Phrix Werke Ag | Process for the production of threads or the like from acrylonitrile polymers |
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