CZ5958U1 - Translucent cover sheet into exterior - Google Patents

Description

Technical field

The technical solution relates to a translucent or transparent exterior cover foil, intended in particular for covering foil structures, smaller halls, hotbeds and the like.

Background Art

Until now, glass, plastic sheets or foils of a simple polymer such as polyethylene or polypropylene are used to cover the structures with the need to maintain the maximum permeability of sunlight. The disadvantages of glass and plastic sheets are generally known, in particular higher weight, costly and difficult to handle.

often used polyethylene and polypropylene films have a favorable low weight, but are usually only applicable for one season, with the construction covering being made again every year. Weather resistance of the film is the biggest problem of their use, often being squeezed by pressing a polyamide strainer to increase its strength, thus extending the use time up to three years, or by photostabilization, which extends use for up to five years, but at the cost of multiple production costs. The essence of the technical solution

This problem is largely solved by the translucent covering foil according to the invention, in particular by the coating of structures in the exterior, which is based on the fact that the foil is formed by a translucent laminating substrate of a weight of 50 to 700 g / m ² , laminated with a top layer of 10 to 80 wt. % of the total weight of the film. The top layer is a translucent copolymer containing at least 70 to 95 wt. % acrylic and / or methacrylic acid methyl ester and 5 to 30 wt. % ethyl ester and / or butyl ester and / or ethylhexyl ester of acrylic or methacrylic acid.

The laminating substrate may comprise textiles, for example twill weaves, a nonwoven fabric such as fleece or glass fabric.

The translucent cover sheet may be provided on the surface with a protective layer of classical polyethylene or polypropylene.

The higher effect of the translucent cover film according to the invention is its resistance to weathering, especially sunlight, and its mechanical strength. This allows its long-term use without losing the essential properties required. The film is strong, flexible and sufficiently translucent. It can be easily cut, glued, repaired and cleaned by conventional means. Compared to the classic polypropylene foil is stiffer and largely self-supporting. It is healthy and environmentally friendly.

Examples of technical solutions

As an example of a film according to the invention, which exhibits a higher mechanical strength and stiffness, the film with the laminating backing-1CZ 5958 of the glass fiber fabric of twill weave of the weight of 100 g / m ² , on which a layer of water-dispersed copolymer is spread in an amount of 50 g / m 2 ² . The copolymer consists of 90 wt. % acrylic acid methyl ester and 10 wt. % acrylic acid butyl ester. The acrylic acid methyl ester is the basic component of the copolymer and the acrylic acid butyl ester is bound in the structure as an internal plasticizer. After evaporation of the solvent, the film can be used immediately, or covered with a protective polyethylene film for longer storage or transport, to prevent sticking of the film.

Depending on the intended use, the laminating substrate can be selected with a wide variety of bonds, such as twill, for example, or a nonwoven fabric that passes most of the solar radiation on some materials.

The weight of the laminating base is chosen according to the requirements for mechanical strength or the self-supporting foil in the range of 10 to 700 g / m ² .

The thickness of the copolymer deposited varies according to the desired thickness, typically 10 to 80 wt. % foil.

Another example may be a 150 g / m ² nonwoven laminating backing film which is saturated with a 50% solution of copolymer in toluene. The copolymer itself constitutes 25% of the total weight of the film. It consists of 80 wt. % methacrylic acid methyl ester and 20 wt. % methacrylic acid ethyl ester.

For long-term use, it is advisable to coat the surface with a layer of classic polyethylene or polypropylene. This provides some protection and also avoids the possible bonding of the film layers, for example, when stored for a longer time in a roll or in layers.

The copolymer may be supplemented with any conventional concomitant, for example, vinilacetate, to provide known modifications to the resulting properties, such as crosslinking.

Industrial usability

The translucent cover foil can be industrially manufactured to cover foil construction in horticulture and agricultural production, to cover portable halls for exhibitions, construction, and so on.

Claims (3)

CLAIMS FOR PROTECTION A translucent covering foil for exterior, in particular for coating structures in an exterior, characterized in that it is formed by a translucent laminating substrate of a grammage of 50 to 700 g / m ² , laminated with a top layer of 10 to 80 wt. % of the total weight of the film, wherein the topsheet is a translucent copolymer containing at least 95 to 70 wt. % acrylic and / or methacrylic acid methyl ester and 5 to 30 wt. % ethyl ester -2CZ 5958 Ul 2. 4. and / or a butyl ester and / or ethylhexyl ester of acrylic or methacrylic acid. The translucent cover foil of claim 1, wherein the laminate backing is formed. The translucent cover foil of claim 1, wherein the laminating substrate forms The translucent cover foil of claim 1, wherein the laminating backing forms a distinctive twill-woven fabric of a nonwoven type. characterized by glass fiber. Translucent cover foil according to one of Claims 1 to 6, characterized in that it is provided with a protective layer of classical polyethylene or polypropylene. End of document