Claims
- 1. A biodegradable adhesive tape comprising:
- an adhesive tape substrate which comprises a biodegradable polymer layer formed from at least one member selected from the group consisting of (i) a linear polyester of 3-hydroxybutyric acid and 3-hydroxyvaleric acid and (ii) a polymer alloy of starch and denatured polyvinyl alcohol;
- a release agent layer formed on one surface of said substrate; and
- an adhesive layer formed on the other surface of said substrate, wherein said adhesive layer comprises a mixture of a natural rubber and at least one tackifier resin selected from the group consisting of rosin, derivatives of rosin, terpene and derivatives of terpene.
- 2. A biodegradable adhesive tape as claimed in claim 1, wherein said tackifier resin is terpene.
- 3. A biodegradable adhesive tape as claimed in claim 1, wherein said derivatives of terpene are selected from the group consisting of .alpha.-pinen resin, .beta.-pinen resin and dipentene resin.
- 4. A biodegradable adhesive tape as claimed in claim 1, wherein said tackifier resin is rosin.
- 5. A biodegradable adhesive tape as claimed in claim 1, wherein said tackifier resin is rosin ester.
Priority Claims (4)
Number |
Date |
Country |
Kind |
5-186472 |
Jul 1993 |
JPX |
|
5-186473 |
Jul 1993 |
JPX |
|
5-186474 |
Jul 1993 |
JPX |
|
5-186475 |
Jul 1993 |
JPX |
|
Parent Case Info
This is a continuation of application Ser. No. 08/280,318 filed on Jul. 26, 1994, now U.S. Pat. No. 5,658,646.
US Referenced Citations (4)
Foreign Referenced Citations (5)
Number |
Date |
Country |
0609713 |
Aug 1994 |
EPX |
4126230 |
Feb 1993 |
DEX |
4220778 |
Aug 1992 |
JPX |
9201733 |
Feb 1992 |
WOX |
9322354 |
Nov 1993 |
WOX |
Continuations (1)
|
Number |
Date |
Country |
Parent |
280318 |
Jul 1994 |
|