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Decorative film and method for producing decorative molded body using same

A technology for decorative films and resin moldings, applied in the direction of chemical instruments and methods, decorations, applications, etc., can solve the problem of insufficient solvent resistance and heat resistance, the inability to fully obtain the bonding strength of decorative films and moldings, wrinkles Disappearance and other issues

Active Publication Date: 2019-04-02
JAPAN POLYPROPYLENE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In such decorative molding by vacuum pressure forming and vacuum forming, when the decorative film and the molded body are pasted, there is a problem that cracks and / or wrinkles of the film occur on the decorative film, and the decorative film and the molded body cannot be sufficiently obtained. Bond strength between
In addition, as a layer for improving the adhesive strength, the use of an adhesive, or a tackifier, etc. is proposed, but such use has problems that they are expensive, the layer constitution becomes extremely complicated, solvent resistance and Insufficient heat resistance, etc.
Thermoformability such as draw-down is expressed by combining dissimilar raw materials as they are, and thermoformability cannot be ensured in a decorative film made of polypropylene-based resin that does not contain dissimilar raw materials, and voids, wrinkles and The entrainment of air tends to occur on the surface of the film-attached molded product, and further, the crack of the film occurs, so a decorative molded product with excellent appearance cannot be obtained
In particular, in the case where a polyurethane resin is contained as a raw material of a different kind, the polyurethane resin which is a thermosetting resin does not melt when heated, so that it is easy to maintain the form of a film, and thermoformability is remarkably improved, but there is a problem that recyclability extremely low
[0007] That is, in the decorative films described in Patent Documents 2 and 3, there are problems in that they contain heterogeneous raw materials for securing thermoformability such as adhesiveness and appearance, the layer constitution is complicated and many steps are required for their production, And it is difficult to recycle decorative films that combine dissimilar raw materials
[0008] In addition, there is a problem of the phenomenon of wrinkle disappearance, that is, the disappearance of wrinkles etc. on the surface of the film by heating and melting of the film at the time of thermoforming
[0009] In addition, decorative molding by vacuum pressure forming and vacuum forming has an advantage in that the molded product has high integrity between the base and the decorative film formed by steps such as injection molding, but on the other hand, there is a problem that the decorative The film picks up scratches formed on the surface of the base, and appearance defects due to the influence of the scratches formed on the surface of the base tend to appear on the surface of the decorative molding

Method used

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  • Decorative film and method for producing decorative molded body using same
  • Decorative film and method for producing decorative molded body using same
  • Decorative film and method for producing decorative molded body using same

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Experimental program
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Effect test

Embodiment approach

[0147] In the basic embodiment, the sealing layer (I) contains a polypropylene-based resin (A). In the basic embodiment, the polypropylene-based resin (A) is preferably a resin that is easily relaxed. By providing the sealing layer (I) containing such a polypropylene-based resin (A), it is possible to suppress the occurrence of voids, wrinkles, and air entrapment on the surface of the decorative molded body, and it is possible to prevent scratches formed on the surface of the substrate. The marks are not obvious.

[0148] >

[0149] 1. Melt flow rate (MFR(A)): (a1)

[0150] In the basic embodiment, the melt flow rate (230°C, 2.16 kg load) MFR (A) of the polypropylene-based resin (A) needs to exceed 0.5 g / 10 minutes, preferably 1 g / 10 minutes or more, more preferably 2 g / 10 minutes More than 10 minutes. Within the above range, relaxation at the time of three-dimensional decorative thermoforming proceeds sufficiently and sufficient adhesive strength can be exhibited. The up...

no. 1 approach

[0155] In the first embodiment, the sealing layer (I) is composed of a resin composition (X1) containing a polypropylene-based resin (A). In the first embodiment, the polypropylene-based resin (A) is preferably a resin that is easy to melt and relax. By providing the sealing layer (I) composed of the resin composition (X1) containing such a polypropylene-based resin (A), the occurrence of voids, wrinkles, and air entrapment, etc., on the surface of the decorative molded body can be suppressed, and Scratches formed on the surface of the substrate can be made inconspicuous.

[0156] >

[0157] 1. Melt flow rate (MFR(A)): (a1)

[0158] In the first embodiment, the melt flow rate (230°C, 2.16 kg load) MFR (A) of the polypropylene-based resin (A) needs to exceed 0.5 g / 10 minutes, preferably 1 g / 10 minutes or more, more preferably 2 g / more than 10 minutes. Within the above range, relaxation at the time of three-dimensional decorative thermoforming proceeds sufficiently, and su...

no. 2 approach

[0169] In the second embodiment, the sealing layer (I) is composed of a resin composition (X2) containing a polypropylene-based resin (A). In the second embodiment, the polypropylene-based resin (A) is preferably a resin whose crystallization starts late. By providing the sealing layer (I) composed of the resin composition (X2) containing such a polypropylene-based resin (A), the occurrence of voids, wrinkles, and air entrapment, etc., on the surface of the decorative molded body can be suppressed, and Scratches formed on the surface of the substrate can be made inconspicuous.

[0170] >

[0171] 1. Melt flow rate (MFR(A)): (a1)

[0172] In the second embodiment, the melt flow rate (230°C, 2.16 kg load) MFR (A) of the polypropylene-based resin (A) needs to exceed 0.5 g / 10 minutes, and preferably 1 g / 10 minutes or more, more preferably 2g / 10 minutes or more. Within the above range, relaxation at the time of three-dimensional decorative thermoforming proceeds sufficiently, a...

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Abstract

A decorative film is to be bonded to a resin molded body by means of thermoforming, and comprises a sealing layer (I) that contains a polypropylene resin (A) and a layer (II) that contains a polypropylene resin (B). The polypropylene resin (A) satisfies the requirement (a1), while the polypropylene resin (B) satisfies the requirement (b1). (a1) The melt flow rate (MFR (A)) (at 230 DEG C under a load of 2.16 kg) is more than 0.5 g / 10 minutes. (b1) The melt flow rate (MFR (B)) (at 230 DEG C under a load of 2.16 kg) and the MFR (A) satisfy relational expression (b-1). MFR (B) < MFR (A) (b-1).

Description

technical field [0001] The present invention relates to a decorative film for sticking on a resin molded body by thermoforming and a method of producing a decorated molded body using the decorative film. More specifically, it relates to a decorative film for sticking to a resin molded body by thermoforming, which can suppress shrinkage and cracking of the film at the time of thermoforming, can exhibit sufficient adhesive strength to the resin molded body, and is effective for the film Damage such as fading of crimps after thermoforming and migration of additives contained in the film to the outside of the film during thermoforming are less, and a method for producing a decorative molded body using the decorative film. Background technique [0002] In recent years, various decoration techniques have been proposed due to the demand for reduction of VOC (Volatile Organic Compounds), etc., and the need for decoration techniques instead of coating. [0003] In particular, a tech...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/32B29C51/16
CPCB29C51/16B32B27/327B32B27/32B32B2307/30B32B2307/72B32B2451/00B32B1/00B32B7/027B32B27/08B32B2250/02B32B2250/03B32B2250/04B32B2250/242B32B2270/00B32B2274/00B32B2307/31B32B2307/412B32B2307/738B32B2405/00B32B2519/00B29C2045/0079Y02P20/582B29C48/022B29C45/0001B29K2023/08B29K2023/12C08L23/0815C08L23/12
Inventor 胜野悟史飞鸟一雄北浦快人新部森万高桥邦宜
Owner JAPAN POLYPROPYLENE CORP
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