Multilayer film and method for producing same

A manufacturing method and multi-layer film technology, applied to chemical instruments and methods, coatings, flat products, etc., can solve the problem of decreased adhesion between decorative films and moldings, and achieve excellent low-temperature adhesion

Active Publication Date: 2020-01-21
KURARAY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it has been pointed out that there is a problem that the adhesive force between the decorative film and the molded body decreases due to the flow of the adhesive due to the molten resin injected.

Method used

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  • Multilayer film and method for producing same

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0107] The method for preparing the resin used as the raw material of the above-mentioned resin film is not particularly limited, and any method can be used as long as the above-mentioned components can be uniformly mixed, and the method of mixing by melt-kneading is preferable.

[0108] The decorative layer (Z) can be colored. Examples of the coloring method include: a method in which the resin itself that constitutes the resin film contains a pigment or a dye, thereby coloring the resin itself before film formation; a dyeing method in which the resin film is dipped in a liquid in which a dye is dispersed and colored, etc. , but is not limited to these methods.

[0109] The decorative layer (Z) can be printed. Designs and colors such as patterns, characters, and graphics are given by printing. The pattern can be a colored pattern or an achromatic pattern. In order to prevent discoloration of the printed layer, printing may be performed on the side in contact with the therm...

Embodiment

[0129] Hereinafter, although an Example etc. demonstrate this invention in more detail, this invention is not limited to these Examples at all. Preparation of test samples and measurement or evaluation of various physical properties in Examples and Comparative Examples were performed as follows, and the results are summarized in the table.

[0130] Each component used in this Example and a comparative example is as follows.

[0131] [multilayer film]

[0132]

[0133] As the intermediate layer (X), the following resins were used.

[0134] ・Polypropylene-based resin (X-1) Polypropylene-based resin CALP-E4361-1 (with talc, melting point = 125°C, heat of fusion = 404mJ, crystallinity = 27 (as a value in the polypropylene matrix), MFR =0.9g / 10min, tensile modulus of elasticity at 23°C E=2960000kPa)

[0135] · Polypropylene-based resin (X-2) polypropylene-based resin Novatec EG7FTB (polypropylene-ethylene random copolymer, melting point = 149°C, heat of fusion = 437mJ, crystal...

Synthetic example 1

[0205] [Thermoplastic Elastomer (A-1)]

[0206] 64 L of cyclohexane as a solvent, 0.20 L of sec-butyllithium (10% by mass cyclohexane solution) as an initiator, and 0.3 L of tetrahydrofuran as an organic Lewis base were charged into the pressure-resistant container after nitrogen substitution and drying. After the temperature was raised to 50° C., 2.3 L of styrene was added and polymerized for 3 hours, then 23 L of isoprene was added and polymerized for 4 hours, and 2.3 L of styrene was further added and polymerized for 3 hours. The obtained reaction solution was poured into 80 L of methanol, and the precipitated solid was filtered off and dried at 50° C. for 20 hours to obtain a triblock copolymer composed of polystyrene-polyisoprene-polystyrene. Next, 10 kg of a triblock copolymer composed of polystyrene-polyisoprene-polystyrene was dissolved in 200 L of cyclohexane, and palladium carbon ( Palladium supported amount: 5% by mass), the reaction was carried out for 10 hours u...

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Abstract

The present invention addresses the problem of providing: a multilayer film which has excellent handling properties and excellent low-temperature adhesiveness to objects of interest made from variousmaterials and can be used for various decorative molding into three-dimensional shapes, and for which the material and the decoration technique can be selected highly flexibility; and a method for producing the multilayer film. The present invention that can solve the problem is a multilayer film which is composed of a multilayer film composed of an intermediate layer (X) and layers (Y) respectively arranged on both surfaces of the intermediate layer (X), and a decorative layer (Z) closely arranged on the surface of either one of the layers (Y), wherein the intermediate layer (X) is composed of a thermoplastic resin layer having a bending stiffness modulus of 60 to 30000 kPa*mm3, and each of the layers (Y) is made from a thermoplastic polymer composition containing a thermoplastic elastomer (A) that is a block copolymer containing an aromatic vinyl compound block (a1) and a conjugated diene compound block (a2) and a polypropylene resin (B) in an amount of 0 to 50 parts by mass relativeto the amount of the thermoplastic elastomer (A). The present invention is also a method for producing the multilayer film, characterized by comprising bringing the thermoplastic resin layers (Y) that serve as the surface layers and are in a molten state into contact with a roll having a surface made from a hydrophobic resin.

Description

technical field [0001] The present invention relates to a multilayer film suitable for decoration of articles having a three-dimensional surface and a method for producing the same. Background technique [0002] Ceramics, metals, and synthetic resins that are excellent in design, durability, heat resistance, and mechanical strength are widely used in various applications such as home appliances, electronic parts, machine parts, and automobile parts. These members may be used by adhering or compounding different materials depending on the application, component configuration, usage method, and the like. In particular, in the exteriors of home appliances, wallpapers, and interiors of cars, etc., for decoration with patterns such as wood grain, for imparting design properties such as metallic or piano black, and for imparting damage resistance or weather resistance Resin decorative films are used for functional and other purposes. Since the decorative resin film can be thermo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B25/16B29C48/18B29C48/885B29C63/02B32B27/00C08L23/12C08L53/02B29K23/00B29K25/00B29L7/00B29L9/00
CPCB29C63/02B29C48/885C08F297/046C08F255/02C08F265/06C08F285/00C08L53/025C09D153/025C09D151/06B29D7/01B29C48/08B29C48/0021B29C48/154B29C48/10B29C48/21B32B27/308B32B9/025B32B2307/54B32B27/365B32B2307/732B32B2451/00B32B27/36B32B27/302B32B27/12B32B9/045B32B5/022B32B27/304B32B27/08B32B27/32C08F222/06C08F220/14C08F212/08C08F220/40C08L51/06C08J5/18B32B25/16B29C48/18B29C48/88C08J2355/02C08J2423/12B29C45/14811B29K2023/12B29K2025/08B29K2209/06B29L2031/722
Inventor 川北展史高桥活荣佐佐木启光
Owner KURARAY CO LTD
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