摘要:
Photochromic interlayer films for laminated glass are composed of at least two individual films based on plasticizer-containing polyvinyl acetal, individual films of the interlayer film containing at least one photochromic compound, wherein the individual films having photochromic compounds have glass transition temperatures which differ from each other by at least 5 K.
摘要翻译:用于夹层玻璃的光致变色夹层膜由至少两种基于含增塑剂的聚乙烯醇缩醛的单独膜组成,含有至少一种光致变色化合物的中间膜的单独膜,其中具有光致变色化合物的各个膜的玻璃化转变温度各自不同 其他至少5 K.
摘要:
An interlayer film with a transparent and a non-transparent region is constructed by providing a non-transparent region of two outer layers of a first mixture of a plasticizer and a polyvinylacetal, and one inner layer of a second mixture of a plasticizer and a polyvinylacetal, and a transparent region of one layer of a third mixture of a plasticizer and a polyvinylacetal, wherein the first and the third mixtures have a transmission for light of 380 to 780 nm of at least 85%, and the second mixture has a transmission for light of 380 to 780 nm of less than 80%, and wherein at least the non-transparent region is provided with a surface roughness with a ratio of Rz/Rv of 1.6 to 2.5 as measured according to EN ISO 4287.
摘要:
Polyvinyl acetal films with less blocking tendency and which allow for escape of gas during laminating to form laminated composities are prepared by a process for embossing a film comprising plasticized polyvinyl acetal with a roughness Rz on at least one surfaces of 20 to 100 μm by the steps of a. extruding of plasticised polyvinyl acetal to a film with a stochastic roughness of the surfaces of Rz=1 to 70 μm, b. embossing at least one surface of the film obtained in step a) with channels having a depth of 5-50 μm, a width of 10-200 μm and a pitch of 50-2500 μm, wherein c. the surface roughness of the elevations between the channels is at most 20% lower as obtained in step a).