Sheet-like structure material and manufacturing method

• US 6,669,890 B1
• Filed: 05/03/2000
• Issued: 12/30/2003
• Est. Priority Date: 11/12/1997
• Status: Expired due to Fees

• Current Assignee: Komatsu Ltd.
• Original Assignee: Komatsu Ltd.
• Inventors: Oishi, Masayuki, Sato, Kanʼichi
• Primary Examiner(s): Colaianni, Michael
• Assistant Examiner(s): Shipsides, Geoffrey P.
• Application Number:
  US09/564,469
• Time in Patent Office: 1,336 Days
• Field of Search: 264/261, 264/254, 264/255, 264/245, 264/246, 264/247, 264/271.1, 264/275, 264/259, 264/1.7, 264/267, 264/294, 264/319, 264/320, 264/328.1, 264/328.7, 156/106
• US Class Current: 264/261
• CPC Class Codes: B29C 2045/14532 injecting between two sheets
• CPC Class Codes: B29C 45/14467 Joining articles or parts of a single article B29C45/14377, B29C45/14385, B29C45/14581, B29C45/14614 and B29C45/006 take precedence
• CPC Class Codes: B29C 45/561 Injection-compression moulding
• CPC Class Codes: B32B 17/10036 comprising two outer glass sheets
• CPC Class Codes: B32B 17/10293 Edge features, e.g. inserts or holes
• CPC Class Codes: B32B 17/10917 between two pre-positioned glass layers
• CPC Class Codes: Y10T 428/23 Sheet including cover or casing
• CPC Class Codes: Y10T 428/24777 Edge feature
• CPC Class Codes: Y10T 428/3163 Next to acetal of polymerized unsaturated alcohol [e.g., formal butyral, etc.]
• CPC Class Codes: Y10T 428/31641 Next to natural rubber, gum, oil, rosin, wax, bituminous or tarry residue

Abstract

The invention discloses a sheet-like structure material and its manufacturing method. The sheet-like structure material has the advantages that impact imposed on its edge ends can be adsorbed to protect its adherends, and that the labor required for installing it and edge ends treatment can be significantly saved. The structure material comprises an outer peripheral structure which has elasticity and is integrally formed at the outer periphery of a sheet-like composite body comprising two glass sheets and an intermediate resin layer disposed between the glass sheets. The outer peripheral structure is formed from a resinous material used for forming the intermediate resin layer, by allowing the material to ooze from between the glass sheets.

Claims

1. A method for manufacturing a composite sheet material, comprising the steps of:

placing a first adherend and a second adherend between dies in a compression molding machine so as to be in close contact with the dies respectively;

filling a mold cavity with a molten resinous material to integrally mold as a single piece an intermediate resin layer and an outer peripheral structure, the intermediate resin layer being formed between and in direct contact with the first and second adherends, the outer peripheral structure having impact absorbing properties and being formed at the outer peripheries of the first and second adherends and of the intermediate resin layer so as to adhere to and cover total outer peripheries of said first and second adherends,

said outer peripheral structure being of a material having a tensile elastic modulus of 1,000 kg/cm² or less.

2. A composite sheet material manufacturing method according to claim 1, wherein when filling the mold cavity with the molten resinous material, compression molding is performed by clamping both dies so as to uniformly apply pressure to the whole molten resinous material, thereby causing the material to spread.

3. A method for manufacturing a composite sheet material, comprising the steps of:

placing a first adherend and second adherend between dies in a compression molding machine so as to be in close contact with the dies respectively;

placing a preformed outer peripheral member spaced from the outer peripheries of the first and second adherends;

filling a mold cavity with a molten resinous material to integrally mold an intermediate resin layer and an outer peripheral structure for adhering to said peripheral member, the intermediate resin layer being formed between the first and second adherends, the outer peripheral structure having impact absorbing properties and being formed at the outer peripheries of the adherends and of the intermediate resin layer,

said outer peripheral structure being of a material having a tensile elastic modulus of 1,000 kg/cm² or less.

4. A composite sheet material manufacturing method according to claim 3, wherein when filling the mold cavity with the molten resinous material, compression molding is performed by clamping both dies so as to uniformly apply pressure to the whole molten resinous material, thereby causing the material to spread.