Wrap film

• US 20040086667A1
• Filed: 07/21/2003
• Published: 05/06/2004
• Est. Priority Date: 07/26/2002
• Status: Active Grant

• Current Assignee: Asahi Kasei Chemicals Corporation (Asahi Kasei Corporation)
• Original Assignee: Asahi Kasei Chemicals Corporation (Asahi Kasei Corporation)
• Inventors: Sakamoto, Yuichiro, Iriya, Masaru
• Granted Patent: US 7,226,655 B2
• Time in Patent Office: Days
• US Class Current: 428/34.1
• CPC Class Codes: B32B 27/36 comprising polyesters
• CPC Class Codes: Y10T 428/13 Hollow or container type article [e.g., tube, vase, etc.]
• CPC Class Codes: Y10T 428/31786 Of polyester [e.g., alkyd, etc.]

Abstract

A wrap film comprising a layer of resin composition (C) as at least one surface layer, wherein resin composition (C) comprises 100 parts by mass of an aliphatic polyester resin (A) and 5 to 40 parts by mass of a liquid additive (B), and having a surface roughness of 0.5 to 4.0 nm, a tensile modulus of 400 to 1500 MPa, a heat resistant temperature of 130° C. or more and cling energy of 0.5 to 2.5 mJ, and a wrap product having the wrap film placed in a box. There is provided an easy-to-use wrap film having cling property and pulling-out property.

Claims

1. A wrap film comprising a layer of resin composition (C) as at least one surface layer, wherein resin composition (C) comprises 100 parts by mass of an aliphatic polyester resin (A) and 5 to 40 parts by mass of a liquid additive (B), having a surface roughness of 0.5 to 4.0 nm, a tensile modulus of 400 to 1500 MPa, a heat resistant temperature of 130°

C. or more and cling energy of 0.5 to 2.5 mJ.

2. A wrap film roll comprising a core and the wrap film according to claim 1 wound around the core, wherein a pulling-out force of the wrap film from the core is 5 to 100 cN.

3. The wrap film according to claim 1, wherein the aliphatic polyester resin (A) contains 90% by mass or more of polylactic acid resin comprising 8% by mass or less of D-body.

4. The wrap film according to claim 1, wherein the liquid additive (B) contains 70% by mass or more of glycerin fatty acid ester.

5. The wrap film according to claim 4, wherein the glycerin fatty acid ester is represented by the following formula (I).

6. A wrap product comprising a core, the wrap film according to any one of claims 1 and 3 to 5 wound around the core and a box having the wrap film placed therein, wherein a cutter blade attached to the box is made of plant derivative-resin or paper.

7. A wrap product comprising the wrap film roll according to claim 2 and a box having the wrap film roll placed therein, wherein a cutter blade attached to the box is made of plant derivative-resin or paper.