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Interlayer for laminated glass and laminated glass
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A technology of laminated glass and interlayer film, applied in the direction of glass/slag layered products, windshields, applications, etc., which can solve the problems of poor appearance of laminated glass
Active Publication Date: 2018-06-08
SEKISUI CHEM CO LTD
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Problems solved by technology
As a result, laminated glass is prone to poor appearance
Method used
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Embodiment 1
[0219] Preparation of the composition for forming the first layer:
[0220] 100 parts by weight of polyvinyl acetal resin shown in Table 1 below, 60 parts by weight of plasticizer shown in Table 1 below, 0.2 part by weight of ultraviolet shielding agent (Tinuvin326), and antioxidant ( H-BHT) 0.2 parts by weight were thoroughly mixed to obtain a composition for forming the first layer.
[0221] Preparation of compositions for forming the second and third layers:
[0222] 100 parts by weight of polyvinyl acetal resin shown in Table 1 below, 38 parts by weight of plasticizer shown in Table 1 below, 0.2 parts by weight of ultraviolet shielding agent (Tinuvin326), and antioxidant (H-BHT) 0.2 weight part, the composition for forming the 2nd layer and the 3rd layer was obtained.
[0223] Production of interlayer film:
[0224] Using an extruder, the composition for forming the first layer and the compositions for forming the second and third layers are coextruded, and the intermed...
Embodiment 2
[0226] Preparation of the composition for forming the interlayer:
[0227] 100 parts by weight of polyvinyl acetal resin shown in Table 1 below, 38 parts by weight of plasticizer shown in Table 1 below, 0.2 parts by weight of ultraviolet shielding agent (Tinuvin326), and antioxidant (H-BHT) 0.2 weight part, the composition for forming an intermediate film was obtained.
[0228] Production of interlayer film:
[0229] Use an extruder to extrude the composition for forming the intermediate film, heat the intermediate film to 100°C to 150°C, hold it for a holding time of 1 minute, then lower the temperature to 25°C, and wind the intermediate film to obtain a coil body. A single-layer interlayer film having a wedge-shaped cross-sectional shape in the thickness direction was fabricated. The thicknesses at the first position of 0.05X from one end to the other end, the second position of 0.5X from one end to the other end, and the third position of 0.95X from one end to the other ...
Embodiment 3
[0235] A three-layer interlayer film was obtained in the same manner as in Example 1 except that the mold temperature was changed and the thickness of the interlayer film was changed according to Table 1 below.
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Abstract
Provided is an interlayer for laminated glass, whereby a laminated glass unlikely to have creases in the interlayer and having suppressed external defects can be obtained. This interlayer for laminated glass has: an MD direction and a TD direction; and one end and another end on the opposite side to the one end and having a greater thickness than the one end. The one end and the other end are positioned on both sides of the interlayer, in the TD direction. When the distance between the one end and the other end is X, the absolute value for the difference between a maximum heat shrinkage and aminimum heat shrinkage is no more than 5%, between: a first heat shrinkage at 150 DEG C at a first position at 0.05 X from the one end towards the other end, in the MD direction; a second heat shrinkage at 150 DEG C at a second position at 0.5 X from the one end towards the other end, in the MD direction; and a third heat shrinkage at 150 DEG C at a third position at 0.95 X from the one end towards the other end, in the MD direction.
Description
technical field [0001] The present invention relates to an interlayer film for laminated glass for obtaining laminated glass. Also, the present invention relates to a laminated glass using the interlayer film for laminated glass. Background technique [0002] In general, even when laminated glass is damaged by external impact, the amount of glass shards scattered is small, and it is excellent in safety. Therefore, the laminated glass is widely used in automobiles, rail vehicles, airplanes, ships, buildings, and the like. The laminated glass is produced by interposing an interlayer film for laminated glass between a pair of glass plates. [0003] Examples of the above-mentioned interlayer film for laminated glass include a single-layer interlayer film having a one-layer structure and a multilayer interlayer film having a two-layer or more structure. [0004] As an example of the above-mentioned interlayer film for laminated glass, the following Patent Document 1 discloses ...
Claims
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Application Information
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