The invention relates to the technical field of high polymer materials, and discloses a double-color gradient PVB (Polyvinyl Butyral) film and a preparation method thereof. The double-color gradient PVB film comprises a first surface layer, a sound insulation layer and a second surface layer which are arranged in a stacked mode. In the first surface layer, one side of a breadth center line contains a wedge-shaped gradient layer; the wedge angle of the wedge-shaped gradient layer is close to the width center line of the first surface layer; the breadth of the wedge-shaped gradient layer is smaller than 1/2 of the total breadth of the double-color gradient PVB film; the thickness of the wedge-shaped gradient layer is smaller than or equal to the thickness of the first surface layer. According to the double-color gradient PVB film, the design of the pure color area and the gradient color area is formed on the appearance, the light transmittance of the pure color area reaches 25% or below, and the light transmittance of the dark color part of the gradient color area reaches 5% or below; the sound insulation layer is arranged between the first surface layer and the second surface layer, so that the PVB film has sound insulation performance; and the PVB film also has good flexibility and stretch resistance.

    本发明涉及高分子材料技术领域,公开了一种双色渐变PVB胶片及其制备方法。所述双色渐变PVB胶片包括层叠设置的第一表面层、隔音层和第二表面层;所述第一表面层中,幅宽中线的一侧含有楔形渐变层;所述楔形渐变层的楔角靠近所述第一表面层幅宽中线;所述楔形渐变层的幅宽小于所述双色渐变PVB胶片总幅宽的二分之一;所述楔形渐变层的厚度小于等于所述第一表面层厚度。本发明提供的双色渐变PVB胶片,外观上形成纯色区域加渐变色区域的设计,纯色区域的透光率达到25%以下,渐变色区域的深色部分透光率达到5%以下;第一表面层和第二表面层中间设置隔音层,使PVB胶片具备隔音性能;PVB胶片还具有好的柔韧性和抗拉伸能力。


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    Title :

    Two-color gradient PVB (polyvinyl butyral) film and preparation method thereof


    Additional title:

    一种双色渐变PVB胶片及其制备方法


    Contributors:
    LIN JIABAO (author) / YE JUNSHENG (author)

    Publication date :

    2025-03-14


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    B32B LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM , Schichtkörper, d.h. aus Ebenen oder gewölbten Schichten, z.B. mit zell- oder wabenförmiger Form, aufgebaute Erzeugnisse / B29C Formen oder Verbinden von Kunststoffen , SHAPING OR JOINING OF PLASTICS / B29D PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE , Herstellen besonderer Gegenstände aus Kunststoff oder aus Stoffen in plastischem Zustand / B29L INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES , Index-Schema für besondere Gegenstände in Verbindung mit Unterklasse B29C / B60J WINDOWS, WINDSCREENS, NON-FIXED ROOFS, DOORS, OR SIMILAR DEVICES FOR VEHICLES , Fenster, Windschutzscheiben und bewegbare Dächer, Türen oder Ähnliches für Fahrzeuge / C03C Chemische Zusammensetzungen für Gläser, Glasuren oder Emails , CHEMICAL COMPOSITION OF GLASSES, GLAZES, OR VITREOUS ENAMELS / C08K Verwendung von anorganischen oder nichtmakromolekularen organischen Stoffen als Zusatzstoffe , USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES AS COMPOUNDING INGREDIENTS / C08L COMPOSITIONS OF MACROMOLECULAR COMPOUNDS , Massen auf Basis makromolekularer Verbindungen