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LAMINATES OF FILMS HAVING IMPROVED RESISTANCE TO BENDING IN ALL DIRECTIONS AND METHODS AND APPARATUS FOR THEIR MANUFACTURE
LAMINATES OF FILMS HAVING IMPROVED RESISTANCE TO BENDING IN ALL DIRECTIONS AND METHODS AND APPARATUS FOR THEIR MANUFACTURE
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机译:薄膜层压板在所有方向上均具有提高的抗弯曲性,其制造方法和装置
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摘要
The present invention relates to a flexible laminate of films of thermoplastic polymer material mainly for applications in which relatively high yield strength and ultimate tensile strength is required, and a method and apparatus for its manufacture. The laminate comprises a monofilm formed or multifilm-formed ply (A) and another monofilm-formed or multifilm formed ply (B) both mainly consisting of orientable thermoplastic polymer material, in which A has a fluted configuration and B on a first side is adhesively bonded in bonding zones to the crests on a first side of A, in which B also has a fluted configuration, the flute direction of B forming an angle from generally about 30° up to and including 90° to the flute direction of A and the said bonding zones being on the crests of the first side of B to produce spot bonding with the crests on the first side of A, the wavelengths of the flutes in A and/or B are no longer than 5 mm, and the wavelengths of the flutes in both A and B are less than 10 mm.
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