CS201124B1

CS201124B1 - Packing band

Info

Publication number: CS201124B1
Application number: CS521476A
Authority: CS
Inventors: Zdenek Pechan
Original assignee: Zdenek Pechan
Priority date: 1976-08-11
Filing date: 1976-08-11
Publication date: 1980-10-31

Description

Vynález se týká těsnící pásky pro utěsněni plošných spojů. Při budováni vodotěsných nádrží z ocelových plechů, spojovaných šrouby nebo nýty namísto svařováním je nezbytné přeplátované plochy bezpečně utěsnit. Materiál těsněni musi vykazovat dlouhodobou a dosti širokou chemickou Odolnost.The present invention relates to a sealing tape for sealing printed circuits. When constructing watertight tanks made of sheet steel, joined by screws or rivets instead of welding, it is necessary to seal the overlapped surfaces securely. The gasket material must exhibit long-term and fairly broad chemical resistance.

Vhodných materiálu, eť již jde o technické pryže nebo chemicky odolné e pružné tmely, není na trhu dostatek. Některé materiály sice vyhovuji po chemické stránce, ale realizace těsněni je závislá na povětrnostních podmínkách, choulostivá na přesné dodržet! pracovního postupu a často pracná. Prosté pásky z běžných termoplastických hmot nelze použit, protože nemá dostatečnou pružnost a přilnavost, takže nesplňuje podmínky vodotěsnosti.There are not enough suitable materials, whether technical rubber or chemically resistant elastic sealants. Some materials are chemically suitable, but the realization of the seal is dependent on weather conditions, sensitive to precise adherence! workflow and often laborious. Plain tapes of conventional thermoplastics cannot be used because they do not have sufficient elasticity and adhesion to meet the watertight conditions.

Na druhé straně je známe tzv. separačni fólie, používaná hojně v obalové technice k zamezeni posunu křehkého zboži, například čokoládových bonbónů v kartónových obalech. Separačni fólie má vytvořeny spojením dvou fólii vzduchové polštářky zpravidla kruhového tvaru, které bráni poškozeni zboží svou pružnosti. Tyto polštářky odolávají tlakům větším než 5 MPa. Takto uzpůsobená aeparačni fólie však nemůže plnit funkci těsnění proti průniku kapalin, například vody.On the other hand, so-called release foils are known, widely used in packaging to prevent the shifting of fragile goods, such as chocolate candies in cardboard packages. The separating foil is formed by joining two foils of an air cushion, generally circular in shape, which prevents the goods from being damaged by their flexibility. These pads withstand pressures greater than 5 MPa. However, the aeparation film thus designed cannot perform the function of sealing against the penetration of liquids, for example water.

Nedostatky známých těsnicich materiálů podstatně snižuje těsnicí páska podle vynálezu, vyrobená z dvojité tvarované fólie, jejiž podstata spočívá v tom, že tvarováním jsouThe drawbacks of the known sealing materials are substantially reduced by the sealing tape according to the invention, made of a double molded foil, the principle of which is that the moldings are

201 124201 124

Claims

Preferably, the air-filled, longitudinally-shaped spaces with a width to length ratio e of 1: 10, in the range of 1: 3 to 1: 500, oriented perpendicular to the direction of sealing.

The advantage of this solution is its ease of assembly and its independence from weather conditions, low consumption of material, so that the sealing is light and cheap. In addition to the chemical resistance, such a sealing tape fits very well. Although the technology for producing a double molded film is known, only the molding process according to the invention makes it possible to obtain a qualitatively new effect, i.e., water-tightness at low pressures up to 2 MPa.

An exemplary embodiment of the invention is shown in longitudinal section.

The sealing tape consists of a double foil 1, connected by joints 2, which enclose the air spaces 3 oriented perpendicular to the direction of sealing, indicated by an arrow. The width-to-distance ratio of these air spaces 3 is preferably 1: 10. The sealed parts 4, 5 are pressed against each other by a screw connection 6. Oako material of the two-layer foil 1 is suitable for polyethylene, polypropylene or a similar thermoplastic material.

The sealing tape acts in such a way that the air-filled spaces 6, when this seal is compressed between the sealing surfaces 4, 5, are elastic and thus ensures the impermeability of the joint. Depending on the width and the tightness requirement, a greater or lesser number of air spaces 3 can be produced.

The drawing shows a double foil seal. Sealing properties can be further improved if double seals are placed in the joint so that they can be placed! two sheets are stacked on top of each other so that the bottom smooth sides are stacked on top of each other so that the sealing surfaces with the air spaces 3 are facing the two surfaces to be joined.

This kind of sealing tape can be advantageously used for sealing metal, but also laminate tanks in chemical and food industry, agriculture and cleaning technology.

Neither is it excluded in the construction and other fields of human activity where it seals adjacent stationary parts firmly tightened, for example, by a screw connection.

THE INVENTION OF THE INVENTION

Double-formed foil sealing tape characterized in that it has air-filled spaces 3 which are longitudinally shaped with a width-to-distance ratio of from 1: 3 to 1: 500, preferably 1: 10, oriented perpendicular to the direction of sealing.

1 drawing