Laminated body, molded body, molded product, and method for manufacturing molded product

Patent metadata

Field	Value
Publication number	US-10239290-B2
Application number	US-201414780792-A
Country	US
Kind code	B2
Filing date	Mar 26, 2014
Priority date	Mar 29, 2013
Publication date	Mar 26, 2019
Grant date	Mar 26, 2019

Abstract

A resin sheet is manufactured by: forming a rapidly-cooled transparent polypropylene sheet by rapidly cooling a molten polypropylene resin; laminating on the rapidly-cooled transparent polypropylene sheet a resin layer of polyurethane resin, the polyurethane resin having a tensile-rupture elongation in a range from 150% to 900% and a softening point in a range from 50 degrees C. to 180 degrees C.; and laminating a print layer on the resin layer. A molded article having a non-planar molding made of the resin sheet is provided by insert molding. The molding is formed into a complicated shape where a part of the molding has: 150% or more of an elongation ratio; 0.8 or less of a film-thickness ratio (B/A) before and after the sheet is molded; and/or a surface area ratio (Y/X) before and after the sheet is molded in a range from 1.5 to 5.

First claim

The invention claimed is:

1. A laminate comprising:
a transparent polypropylene layer (A) of a polypropylene resin; and
a resin layer (B) of a polyurethane resin, the polyurethane resin having a tensile-rupture elongation in a range from 150% to 900% and a softening point in a range from 50 degrees C. to 180 degrees C., the transparent polypropylene layer (A) and the resin layer (B) being laminated with each other, wherein
the transparent polypropylene layer (A) has 1 J/g or more of an exothermic peak at a low-temperature side of the maximum endothermic peak in a differential scanning calorimetry (DSC) curve, and
the transparent polypropylene layer (A) is formed by rapidly cooling a molten resin of the polypropylene resin.

2. The laminate according to claim 1 , wherein
the molten resin is rapidly cooled using a cooling roller whose surface temperature is kept in a range from a dew point to 50 degrees C. to form the transparent polypropylene layer (A).

3. The laminate according to claim 1 , wherein
the resin layer (B) is made of a resin obtained by reacting at least diisocyanate, a high-molecular-weight polyol and a chain extender, the high-molecular-weight polyol being selected from polyether polyol and polycarbonate polyol.

4. The laminate according to claim 1 , wherein
at least a part of a side of the resin layer (B) opposite to a side adjacent to the transparent polypropylene layer (A) is applied with printing.

5. A laminate comprising:
a transparent polypropylene layer (A) of a polypropylene resin; and
a resin layer (B) of a polyurethane resin, the polyurethane resin having a tensile-rupture elongation in a range from 150% to 900% and a softening point in a range from 50 degrees C. to 180 degrees C., the transparent polypropylene layer (A) and the resin layer (B) being laminated with each other, wherein
the transparent polypropylene layer (A) has 4 μm or less of an average spherulite radius, 600 or less per mm 2 of an average spherulite number in a cross section of the sheet, 0.896 g/cm 3 or less of a solid density, less than 90 J/g of a fusion enthalpy ΔH of a maximum endothermic peak in a differential scanning calorimetry (DSC) curve, 90% or more of a glossiness on at least one side, and 1 J/g or more of an exothermic peak at a low-temperature side of the maximum endothermic peak in a differential scanning calorimetry (DSC) curve.

Assignees

• Idemitsu Unitech Co Ltd

Inventors

• Kondo Kaname

Classifications

• B29C48/914

  Cooling drums · CPC title

• B32B2307/412

  Transparent · CPC title

• B32B27/40

  comprising polyurethanes · CPC title

• B29C48/305

  having a wide opening, e.g. for forming sheets · CPC title

• B32B2509/00

  Household appliances · CPC title