DE1669067C3 - Process for making releasable heat seals - Google Patents
Process for making releasable heat sealsInfo
- Publication number
- DE1669067C3 DE1669067C3 DE19671669067 DE1669067A DE1669067C3 DE 1669067 C3 DE1669067 C3 DE 1669067C3 DE 19671669067 DE19671669067 DE 19671669067 DE 1669067 A DE1669067 A DE 1669067A DE 1669067 C3 DE1669067 C3 DE 1669067C3
- Authority
- DE
- Germany
- Prior art keywords
- lid
- container
- phenol
- heat seals
- coating
- 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
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D177/00—Coating compositions based on polyamides obtained by reactions forming a carboxylic amide link in the main chain; Coating compositions based on derivatives of such polymers
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D161/00—Coating compositions based on condensation polymers of aldehydes or ketones; Coating compositions based on derivatives of such polymers
- C09D161/04—Condensation polymers of aldehydes or ketones with phenols only
- C09D161/06—Condensation polymers of aldehydes or ketones with phenols only of aldehydes with phenols
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Packages (AREA)
- Closures For Containers (AREA)
- Paints Or Removers (AREA)
- Sealing Material Composition (AREA)
- Laminated Bodies (AREA)
Description
Die Erfindung bezieht sich auf ein Verfahren zum Herstellen lösbarer Heißsiegelungen durch Überziehen von Behälter und Deckel einer Verpackung mit einem L.ack, der ein Phenolformaldthydharz und ein »5 Polyamidharz sowie ein Lösungsmittel enthält, und Heißsiegeln der Verpackung.The invention relates to a method of making releasable heat seals by coating of the container and lid of a packaging with a lacquer containing a phenol-formaldehyde resin and a »5 Contains polyamide resin and a solvent, and heat sealing the package.
Ein Verfahren der vorerwähnten Art ist aus der deutschen Auslegeschrift I ('52 2(SO bekannt. Des weiteren sind in den USA.-Patentschriften 2 662 <S(S5 und 2 930 774 Lacke besehrieben, die aus einem Polyamid- und einem Phenolformaldchydharz in einem Lösungsmittel bestehen. Dem Zusatz an Phenolformaldehydharz kommt dabei die Aufgabe zu, die mechanische Festigkeit und Kochfestigkeit des Überzugs sowie dessen Haftvermögen zu verbessern. Allerdings gellt dies bei höheren Zusätzen von Phenolformaldehydharz auf Kosten der SicgelungsiiihigkeitA method of the aforementioned type is known from the German Auslegeschrift I ('52 2 (SO. Des others are in U.S. Patents 2,662 <S (S5 and 2 930 774 paints are described that are made of a polyamide and a phenol formaldehyde resin in a solvent. The addition of phenol-formaldehyde resin The task here is to maintain the mechanical strength and boiling resistance of the coating as well as to improve its adhesion. However, this applies to higher additions of phenol-formaldehyde resin at the expense of the bankability
Lacke für Aufreißpackungeii. die üblicherweise aus einem Metallbehälter und einem Deckel, beispielsweise aus Aluminium, bestehen, müssen ein gutes Haftvermögen besitzen und darüber hinaus sterilisations- und korrosionsbeständig sowie heißsiegelfähig sein, weil beim Verschließen der in Rede stehenden Aufreiüpackungcii üblicherweise auf den mit einem flachen gebördelten Ram! versehenen Behälter ein mit einer Lasche versehener Deckel heiß aufgesiegell wird. Demzufolge liegt der Erfindung die Aufgabe zugrunde, dem Rechnung zu tragen.Lacquers for easy-open packaging. which usually consist of a metal container and a lid, for example made of aluminum, must be a good one Have adhesive power and also resistant to sterilization and corrosion as well as heat-sealable be because when closing the open pack in question usually on the with a flat beaded ram! provided container with a lid provided with a flap hot sealed will. Accordingly, the invention is based on the object of taking this into account.
Die Lösung der vorerwähnten Aufgabe basiert auf dem Gedanken, für den Deckel und den Behälter Lacke mit einem unterschiedlichen Mengenverhältnis von Polyamidharz zu Phenolformaldehydhar/. zu verwenden. Im einzelnen besteht die Erfindung darin, d«ü der Überzug des Behälters» bis IO «/n Phenolharz und der Überzug des Deckels bis 351Vn, vorzugsweise 12 bis 35". η Phenolharz enthält. Auf diese Weise wird sichergestellt, daü die Trennung beim Ablösen des Deckels innerhalb des durch die Sicgelung verschweißten Filmes verläuft, ohne daü von der flachen Deckelflächc oder der Behälterwandung Überzugslcilc abgerissen werden.The solution to the above-mentioned problem is based on the idea of varnishes for the lid and the container with a different proportion of polyamide resin to phenol formaldehyde resin. to use. In detail, the invention is d "above the coating of the container" to IO "comprises / n phenolic resin and the coating of the lid to 35 1 Vn, preferably 12 to 35". Η phenolic resin. In this way it is ensured DAT separation when the lid is detached, it runs within the film welded by the sealing, without any covering pieces being torn off the flat lid surface or the container wall.
Es genügt beispielsweise, den Gehalt an Phenolformaldehydharz von H bis 10 Gewichtsprozent im Behälter auf 12 bis 35 Gewichtsprozent im Deckel zu erhöhen.It is sufficient, for example, the content of phenol-formaldehyde resin from 1 to 10 percent by weight in the Increase container to 12 to 35 percent by weight in the lid.
Behälter-LackContainer paint
Polyamid 20Polyamide 20
Propanol 70Propanol 70
Wasser 8Water 8
Phcnolformaldehydharz 2Phenol formaldehyde resin 2
Deckel-LackLid varnish
Polyamid 20Polyamide 20
Propanol 69Propanol 69
Wasser 8Water 8
Phenolformaldehydharz 3Phenol formaldehyde resin 3
Deckel-LackLid varnish
Polyamid 20Polyamide 20
Propanol 62Propanol 62
"Wasser 8"Water 8
Phenolformaldchydharz 10Phenol formaldehyde resin 10
Die Lacke werden bei 200 bis 230 C in 10 bis 2 Minuten getrocknet; die Filmdicke ist vorzugsweise6 bis 15 Mikron; die Siegeltemperatur kann 240° C betragen.The paints are at 200 to 230 C in 10 to 2 Minutes dried; the film thickness is preferably 6 to 15 microns; the sealing temperature can be 240 ° C be.
Nach der neuen Erfindung entfällt die Herstellung und Verwendung von Verbundfolien aus Kunststoff mit Aluminium, ebenso von solchen aus Vinylidcnclilorid-Vinylchlorid-Mischpolymerisatcn mit Zellglas und einem weiteren KunststolT-Film.According to the new invention, the production and use of composite films made of plastic are no longer necessary with aluminum, as well as with those made from vinylidene chloride-vinyl chloride copolymers with cellophane and another KunststolT film.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH1154068A CH517020A (en) | 1967-08-18 | 1968-08-01 | Polyamide and pf resin mixtures - for heat-sealing lids on containers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEW0044585 | 1967-08-18 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| DE1669067A1 DE1669067A1 (en) | 1971-01-14 |
| DE1669067B2 DE1669067B2 (en) | 1973-11-29 |
| DE1669067C3 true DE1669067C3 (en) | 1974-07-11 |
Family
ID=7604130
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19671669067 Expired DE1669067C3 (en) | 1967-08-18 | 1967-08-18 | Process for making releasable heat seals |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE1669067C3 (en) |
-
1967
- 1967-08-18 DE DE19671669067 patent/DE1669067C3/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE1669067B2 (en) | 1973-11-29 |
| DE1669067A1 (en) | 1971-01-14 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C3 | Grant after two publication steps (3rd publication) | ||
| E77 | Valid patent as to the heymanns-index 1977 | ||
| EHJ | Ceased/non-payment of the annual fee |