摘要:
A shrink film comprising at least one polyolefinic layer comprising polypropylene and a resin admixture is disclosed. The film processes a shrinkability of more than 20%, measured at 90.degree. C., in the transverse direction and of less than 8%, also measured at 90.degree. C., in the longitudinal direction. The film is manufactured by coextrusion followed by stretching in the longitudinal and transverse directions, whereby stretching in the longitudinal direction is performed such that the birefringence value .DELTA.n of the longitudinally oriented film does not exceed the range from 10.times.10.sup.-3 to 13.times.10.sup.-3.
摘要:
A shrink film which is comprised of a plurality of polyolefinic layers is disclosed. The base layer comprises polypropylene and a hydrogenated hydrocarbon resin admixture, and the top layers on each side of the base layer comprise polyolefinic sealable raw materials. The film possesses a shrinkability of more than 15% in the transverse direction and of less than 6% in the longitudinal direction, both measured at 90.degree. C. Also disclosed is a process for manufacturing the film comprising coextrusion followed by stretching of the film in the longitudinal and transverse directions, whereby stretching in the longitudinal direction is performed such that the double refraction value .DELTA.n of the longitudinally oriented film is not greater than 15.times.10.sup.-3.
摘要:
The biaxially oriented film based on a propylene polymer contains an inorganic particulate neutralizing agent, in particular a carbonate or magnesium oxide. To improve the slip properties, the particles have been given a hydrophobic coating, in particular a coating of wax, a fatty acid, a salt of a fatty acid or an ester of a fatty acid.
摘要:
Biaxially oriented, co-extruded polyester films comprising a base layer consisting of at least 90 wt. % thermoplastic polyester, preferably polyethylene terephthalate (PET), at least one sealable outer layer and a second non-sealable outer layer and, optionally, other intermediate layers, in addition to at least one flame-retardant agent, preferably organic phosphorous compounds. The inventive films are characterized by low inflammability, high UV stability, no embrittlement when subjected to thermal stress and a surface which is devoid of troublesome opacity. They are suitable for a multiplicity of uses both indoors and outside. The outer layers contain anti-blocking agents such as silicic acid having an average particle diameter of preferably less than 50 nm and/or 2 μm. Preferably, the sealable outer layer consists of a copolyester which is made of ethylene terephthalate and ethylene isophthalate units.
摘要:
Biaxially oriented, co-extruded polyester films comprising a base layer consisting of at least 90 wt. % thermoplastic polyester, preferably polyethylene terephthalate (PET), at least one sealable outer layer and a second non-sealable outer layer and, optionally, other intermediate layers, in addition to at least one flame-retardant agent, preferably organic phosphorous compounds. The inventive films are characterized by low inflammability, no embrittlement when subjected to thermal stress and a surface which is devoid of troublesome opacity, and are suitable for a multiplicity of uses both indoors and outside. The outer layers contain anti-blocking agents such as silicic acid having a particle diameter of preferably less than 50 nm and/or more than 2 μm. Preferably, the sealable outer layer consists of a copolyester which is made of ethylene terephthalate and ethylene isophthalate units.
摘要:
The invention concerns a unilaterally mat, sealable, UV-stabilized and flame-resistant, sealable, co-extruded, biaxially oriented polyester film comprising at least one base layer (B) and a sealable top coating (A) applied to both sides of said base layer, in addition to a mat covering (C). The film also contains at least one UV stabilizer as a light stabilizer. The invention further concerns a method for the production of said film and the use thereof.
摘要:
A multiple-pack system composed of a combined pack made from individual packages, where the individual packaging takes place in a biaxially stretch-oriented polypropylene film with modified polyolefinic sealable layers. The characterizing features of the multiple-pack system are that the combined-pack film is composed of a sealable, biaxially stretch-oriented coextruded polyester film having more than one layer, where the sealable outer layer(s) comprise(s) copolyester. In the novel multiple-packed system, the combined-pack film is sealable with itself, but does not seal to the biaxially oriented polypropylene films of the individual packages.
摘要:
Biaxially oriented, coextruded polyester films with a base layer at least 90% by weight of which is composed of a thermoplastic polyester, preferably polyethylene terephthalate (PET), and with at least one sealable outer layer and a second nonsealable outer layer and, if desired, with other intermediate layers, and comprising at least one UV absorber, preferably hydroxybenzotriazoles and triazines, have high UV resistance, do not embrittle when exposed to high temperatures, have a surface without undesirable haze and are suitable for numerous indoor and outdoor applications. The outer layers comprise antiblocking agents, such as silica with an average particle diameter preferably below 50 nm and/or above 2 μm, and the sealable outer layer is preferably composed of a copolyester which has been built up from ethylene terephthalate units and ethylene isophthalate units.
摘要:
A polyolefinic multilayer film comprises a base layer containing polypropylene and at least one outer layer. The outer layer comprises a C.sub.3 /C.sub.4 -olefin resin composition with a low degree of crystallinity and has a minimum heat-sealing temperature of below 84.degree. C. A process for the production of the multilayer film and the use thereof are also described.
摘要:
The disclosed oriented, multilayer olefin polymer film comprises an olefin polymer base layer and at least one outer layer, which outer layer contains from 0.01 to 1% by weight, based on the weight of the outer layer, of approximately spherical ceramic particles. The outer layer can be heat-sealable or non-heat-sealable. The multilayer olefin polymer film is produced by a coextrusion process in which the coextruded film is biaxially stretched, heat-set, and optionally surface-treated. The resulting film is useful in packaging and as a printing surface or in laminates.