DE1086884B - Process for improving the slidability of structures made of high pressure polyethylene - Google Patents
Process for improving the slidability of structures made of high pressure polyethyleneInfo
- Publication number
- DE1086884B DE1086884B DEP15051A DEP0015051A DE1086884B DE 1086884 B DE1086884 B DE 1086884B DE P15051 A DEP15051 A DE P15051A DE P0015051 A DEP0015051 A DE P0015051A DE 1086884 B DE1086884 B DE 1086884B
- Authority
- DE
- Germany
- Prior art keywords
- amide
- polyethylene
- acid amide
- mixture
- weight
- 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.)
- Pending
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/16—Nitrogen-containing compounds
- C08K5/20—Carboxylic acid amides
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Lubricants (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Description
Die Erfindung betrifft ein Verfahren zur Verbesserung der Gleitfähigkeit von Gebilden aus Hochdruckpolyäthylen durch Behandlung mit Fettsäurederivaten. ■The invention relates to a method for improving the lubricity of structures made of high-pressure polyethylene by treatment with fatty acid derivatives. ■
Polyäthylen erfreut sich, insbesondere in Form von Filmen als Packmaterial, großer Beliebtheit im Handel. Ein im üblicher Weise durch Auspressen hergestellter Polyäthylenfilm ist glatt und biegsam. Übereinanderliegende, durch Auspressen gewonnene Folien aus Polyäthylen sind jedoch, insbesondere wenn sie to vorher einem Druck unterworfen wurden, nur schwer voneinander zu trennen. Dieses Aneinanderhaften oder -kleben von Polyäthylenfolien verursacht bei Schläuchen oder Folien, die zu Tüten oder Säcken verarbeitet werden sollen, ein schwierig zu lösendes Problem. Schläuche oder Folien werden gewöhnlich nach dem Auspressen in flachem oder zusammengedrücktem Zustand als endloses Band aufgewickelt und dann zu der Vorrichtung transportiert, durch die der Film zu Säcken oder Tüten verarbeitet wird. Die Verwendbarkeit des in dieser Weise hergestellten schlauchförmigen Polyäthylenmaterials wird dadurch behindert, daß die Schläuche und insbesondere deren Innenflächen aneinanderhaften. Auch können die aus Polyäthylenfolien und schlauchförmigem Material hergestellten Säcke zu ihrer Füllung häufig nicht leicht geöffnet werden.Polyethylene enjoys great popularity in the trade, especially in the form of films as packaging material. A polyethylene film made in a conventional manner by extrusion is smooth and pliable. Superimposed, Polyethylene foils obtained by pressing are, however, especially if they are to were previously subjected to pressure, difficult to separate from each other. This clinging or -The sticking of polyethylene foils causes hoses or foils that are processed into bags or sacks become a difficult problem to solve. Tubes or foils are usually after Wring out in a flat or compressed state as an endless belt and then wound into the Transported device through which the film is processed into sacks or bags. The usability the tubular polyethylene material produced in this way is hindered by the fact that the Hoses and in particular their inner surfaces adhere to one another. They can also be made of polyethylene foils and sacks made of tubular material are often not easily opened to fill them.
Es ist zwar bereits eine Polyäthylenpreßmasse bekanntgeworden, aus der Filme von wesentlich größerer Transparenz und Glätte erhalten werden, als sie die aus dem bisher verfügbaren; Material erhaltenen Filme aufweisen, jedoch besitzen diese Filme eine stärkere Neigung, aneinanderzuhaften oder -zukleben. Es wurde sogar gefunden, daß das Aneinanderhaften so stark ist, daß die Innenseiten der Schläuche schon unmittelbar, nachdem eine Luftblase hindurchgejagt wurde, wieder aneinanderhaften. Ferner wird bei Verwendung von schlauchförmigen Polyäthylenfilmen, die aus der neuen Art Preßpulver hergestellt werden, 30% mehr Abfall erhalten als bei den aus dem bisher verfügbaren Preßpulver hergestellten. Die Einführung der neuen Art Polyäthylenpreßpulver hat also große Schwierigkeiten bei der Herstellung von nicht haftendem Polyäthylenmaterial in Form von Schläuchen und Filmen mit sich gebracht, die durch die Erfahrungen, die an den üblicheren Arten von Polyäthylenfilmen und Folien gemacht wurden, nicht gelöst werden können.It is true that a polyethylene molding compound has already become known from which films of much larger size Transparency and smoothness are preserved than they are from what was previously available; Material obtained films have, however, these films have a greater tendency to stick or stick together. It it was even found that the sticking together is so strong that the inner sides of the hoses are immediately after a bubble has been blown through, stick together again. Furthermore, when using of tubular polyethylene films made from the new type of molding powder, 30% get more waste than that produced from the previously available press powder. The introduction The new type of polyethylene molding powder has great difficulties in producing non-adhesive Polyethylene material in the form of tubes and films brought about by the experiences, made on the more common types of polyethylene films and foils cannot be solved.
Die neue Art von Polyäthylen, die nunmehr verfügbar ist, unterscheidet sich von der bisher hergestellten dadurch, daß die Oberfläche des daraus durch Auspressen hergestellten Films glatter und die Transparenz des Films größer ist Diese Eigenschaften der neuen Polyäthylenart sind vermutlich auf eine geringere Anzahl von Kurzkettenverzweigungen und größere Dichte, verglichen mit den bisherigen Materialien, Verfahren zur VerbesserungThe new type of polyethylene that is now available differs from that previously produced in that the surface of the extruded film made therefrom is smoother and the transparency of the film is greater These properties of the new type of polyethylene are probably due to a lower level Number of short chain branches and greater density compared to previous materials, Process for improvement
der Gleitfähigkeit von Gebildenthe sliding ability of structures
aus Hochdruckpolyäthylenmade of high pressure polyethylene
Anmelder:Applicant:
Plax Corporation,
Hartford, Conn. (V. St. A.)Plax Corporation,
Hartford, Conn. (V. St. A.)
Vertreter: Dr. F. Zumstein, Patentanwalt,
München 2, Bräuhausstr. 4Representative: Dr. F. Zumstein, patent attorney,
Munich 2, Bräuhausstr. 4th
Alvin Raynham Nielsen, Hartford, Conn. (V. StA.),
ist als Erfinder genannt wordenAlvin Raynham Nielsen, Hartford, Conn. (V. StA.),
has been named as the inventor
zurückzuführen. Genauer gesagt, ist das neue Produkt durch ein Kurzkettenverzweigungsverhältnis von nicht über etwa 2,3 und eine Dichte von wenigstens etwa 0,920 ausgezeichnet.traced back. More specifically, the new product is by a short chain branch ratio of not above about 2.3 and a density of at least about 0.920 excellent.
Die entsprechenden Eigenschaften des bisher verfügbaren Polyäthylens sind ein Kurzkettenverzweigungsverhältnis von wenigstens etwa 3 und eine Dichte von nicht mehr als 0,917. Außerdem besaßen die bisher verfügbaren Äthylenpolymeren einen, wesentlich größeren Molekulargewichtsbereich als das neuartige Polyäthylen, weshalb auch das Schmelzen und Erstarren der älteren Art weniger gleichmäßig in einem weiteren Bereich erfolgte. Durch Auspressen aus diesem älteren Polyäthylen gewonnene Filme besitzen einen matteren Glanz und sind nur begrenzt durchscheinend.The corresponding properties of the previously available Polyethylene has a short chain branch ratio of at least about 3 and a density of not more than 0.917. In addition, the ethylene polymers available heretofore had one essential feature larger molecular weight range than the new type of polyethylene, which is why it melts and solidifies the older species took place less evenly in a wider area. By squeezing out of this Older polyethylene-made films have a dull gloss and are only partially translucent.
Für andere Zwecke waren als Zusatz zu Polyäthylen bereits Ester mehrwertiger Alkohole oder Salze von Fettsäuren, partielle Amide von Polycarbonsäuren und Amide von Fettsäuregemischen mit 4 bis 10 Kohlenstoffatomen bekannt. Zur Überwindung der geschilderten Schwierigkeiten sind diese Zusätze jedoch nicht geeignet.For other purposes, esters of polyhydric alcohols or salts of were already added to polyethylene Fatty acids, partial amides of polycarboxylic acids and amides of fatty acid mixtures with 4 to 10 carbon atoms known. However, these additions are not intended to overcome the difficulties outlined suitable.
Es wurde nun gefunden, daß diese Schwierigkeiten überwunden werden können, wenn man in Hochdruckpolyäthylen vor dem Verpressen 0,1 bis 2 Gewichtsprozent eines ungesättigten Fettsäureamids der allgemeinen Formel It has now been found that these difficulties can be overcome by working in high pressure polyethylene before pressing 0.1 to 2 percent by weight of an unsaturated fatty acid amide of the general formula
- Ii /H - Ii / H
R —C—N,R — C — N,
in der R einen Alkylrest mit 13 bis 19 Kohlenstoff-in which R is an alkyl radical with 13 to 19 carbon
009 570/432009 570/432
Claims (3)
Fettsäureamiden, die der allgemeinen Formel entsprechen, in bekannter Weise einarbeitet oder es nach dem Beispiel 1 wird wiederholt, jedoch wird in diesem Verpressen mit 0,1 bis 2 Gewichtsprozent der genann- Fall ein »neuartiges« Polyäthylenpreßpulver mit ten Fettsäu'reamide oder .deren Gemischen überzieht. 5 einem spezifischen Gewicht von etwa 0,923 und einematoms means or mixtures thereof with saturated "- : ""■'Example 2
Fatty acid amides, which correspond to the general formula, incorporated in a known manner or it is repeated according to Example 1, but in this compression with 0.1 to 2 percent by weight of the mentioned case a "new" polyethylene powder with th Fettsäu'reamide or .deren Mixtures coated. 5 a specific gravity of about 0.923 and a
verteilt wird, oder dadurch, daß man das Amid oder 40 Ti " · 1 ft
die Amidgemische beim Verpressen als Überzug auf ±> ei spiePressing a melt of the polyethylene molding powder Example 1 is repeated, but formation takes place in this. Polyethylene films with an improved lubricity of about 1 percent by weight of the amide mixture according to the invention are either used as a result of Example 4. The hose obtained in this way, so that a mixture of the amide and the shaped material is sufficiently slidable, and pressed polyethylene powder, so that the amide is difficult to wind up evenly in the film directions with the usual winding prior to pressing,
or by adding the amide or 40 Ti "x 1 ft
the amide mixtures when pressed as a coating on ±> egg spat
0,005 · 17,5 cm gepreßt. Die so hergestellten Schläuche 60 .About 2 g of a mixture made from about 6 weight to about 75 g of acetone. The percent stearic acid amide produced in this way, about 91 percent by weight of the solution, is spread on both surfaces of several sheets of oleic acid amide and about 3 percent by weight of linoleic, a polyethylene of the "old type". After acid amide with about 10 Ωg of a polyethylene evaporation of the solvent, it is found that the molding powders with a specific gravity of about 55 areas of the polyethylene film had unbonded 0.921 and a short chain branching ratio and improved lubricity. So treated of about 2.2 mixed. The mixture will then adhere to the polyethylene sheets if they are stored on top of one another in the usual manner with a 2.5 cm extrusion device, even after the application of pressure on to form a tubular film with the dimensions of the stack not to one another.
0.005 x 17.5 cm pressed. The hoses 60 produced in this way.
worden war, wies unangenehmes Haften auf. Beson-In the case of sacks or sachets made therefrom, if only 0.1 g of the amide mixture according to Example 4 is filled, no difficulties arise. A control used. The results obtained in this way are comparable to those samples prepared in Example 1 without the addition of the amide mixture,
exhibited uncomfortable adhesion. Special
Deutsche Patentschrift Nr. 865 196;
britische Patentschriften Nr. 639 084, 731 728;
USA.-Patentschriften Nr. 2 462 331, 2 525 691.Considered publications:
German Patent No. 865 196;
British Patent Nos. 639 084, 731 728;
U.S. Patent Nos. 2,462,331, 2,525,691.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEP15051A DE1086884B (en) | 1955-10-25 | 1955-10-26 | Process for improving the slidability of structures made of high pressure polyethylene |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3050455A GB792009A (en) | 1955-10-25 | 1955-10-25 | Improvements in or relating to polyethylene having improved slip characteristics |
DEP15051A DE1086884B (en) | 1955-10-25 | 1955-10-26 | Process for improving the slidability of structures made of high pressure polyethylene |
Publications (1)
Publication Number | Publication Date |
---|---|
DE1086884B true DE1086884B (en) | 1960-08-11 |
Family
ID=25989791
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEP15051A Pending DE1086884B (en) | 1955-10-25 | 1955-10-26 | Process for improving the slidability of structures made of high pressure polyethylene |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE1086884B (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1285664B (en) * | 1963-09-30 | 1968-12-19 | Kurashiki Rayon Co | Method for preventing the sticking of elastic polyurethane threads |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2462331A (en) * | 1944-04-13 | 1949-02-22 | Bakelite Corp | Polyethylene compositions |
GB639084A (en) * | 1947-01-08 | 1950-06-21 | Du Pont | Improvements in or relating to the electro-deposition of solid ethylene polymers |
US2525691A (en) * | 1946-07-16 | 1950-10-10 | Ici Ltd | Antistatic polyethylene compositions containing water-insoluble aliphatic alcohols or ethyleneoxide condensation products |
DE865196C (en) * | 1941-03-19 | 1953-01-29 | Hydrierwerke A G Deutsche | Softening, gelatinizing and swelling agents |
GB731728A (en) * | 1953-01-19 | 1955-06-15 | Ici Ltd | Improved polythene compositions and articles thereof |
-
1955
- 1955-10-26 DE DEP15051A patent/DE1086884B/en active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE865196C (en) * | 1941-03-19 | 1953-01-29 | Hydrierwerke A G Deutsche | Softening, gelatinizing and swelling agents |
US2462331A (en) * | 1944-04-13 | 1949-02-22 | Bakelite Corp | Polyethylene compositions |
US2525691A (en) * | 1946-07-16 | 1950-10-10 | Ici Ltd | Antistatic polyethylene compositions containing water-insoluble aliphatic alcohols or ethyleneoxide condensation products |
GB639084A (en) * | 1947-01-08 | 1950-06-21 | Du Pont | Improvements in or relating to the electro-deposition of solid ethylene polymers |
GB731728A (en) * | 1953-01-19 | 1955-06-15 | Ici Ltd | Improved polythene compositions and articles thereof |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1285664B (en) * | 1963-09-30 | 1968-12-19 | Kurashiki Rayon Co | Method for preventing the sticking of elastic polyurethane threads |
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