Claims
- 1. In a greenhouse for protecting plants from weather exposure, including a framework and a single layer of polyethylene terephthalate film stretched over the framework, the improvement wherein said polyethylene terephthalate film is a biaxially oriented film having:
- a refractive index in the oriented direction of 1.59-1.75,
- a refractive index in the thickness direction of 1.485-1.56,
- a density of 1.350-1.382 g/cm.sup.3,
- an intrinsic viscosity of 0.52-0.71, and
- a thickness of 50-500 microns.
Priority Claims (7)
Number |
Date |
Country |
Kind |
49/110428 |
Sep 1974 |
JPX |
|
49/146713 |
Dec 1974 |
JPX |
|
50/10953 |
Jan 1975 |
JPX |
|
50/16919 |
Feb 1975 |
JPX |
|
50/26053 |
Mar 1975 |
JPX |
|
50/45125 |
Apr 1975 |
JPX |
|
50/80484 |
Jul 1975 |
JPX |
|
Parent Case Info
This application is a continuation of application Ser. No. 820,033, filed July 28, 1977, which is a continuation application of Ser. No. 616,899, filed Sept. 25, 1975, both now abandoned.
US Referenced Citations (28)
Foreign Referenced Citations (4)
Number |
Date |
Country |
703608 |
Feb 1965 |
CAX |
1569591 |
May 1969 |
DEX |
1937998 |
Feb 1970 |
DEX |
7004891 |
Oct 1970 |
NLX |
Continuations (2)
|
Number |
Date |
Country |
Parent |
820033 |
Jul 1977 |
|
Parent |
616899 |
Sep 1975 |
|