Claims
- 1. A bag for packaging vegetables and fruits, comprising front and rear walls formed of a biaxially oriented multi-layer anti-fogging film, the film comprising a base layer and at least one surface layer containing an anti-fogging agent, at least three peripheral sides of the front wall being connected to corresponding peripheral sides of the rear wall in such a manner that an anit-fogging heat sealable surface layer of the front wall faces an anti-fogging heat sealable surface layer of the rear wall, the film having a water vapor transmission of 15 to 200 g/m.sup.2 -24 hr-40.degree. C., an oxygen permeability of 3,000 to 35,000 cc/m.sup.2 -24 hr-atm-20.degree. C.-90% RH, and a carbon dioxide permeability of 12,000 to 130,000 cc/m.sup.2 -24 hr-atm 20.degree. C.-90% RH, the anti-fogging surface layer having heat sealing properties such that the film shows a side welding seal strength of at least 3.0 kg-cm/15 mm when side welding is carried out at 270.degree. C., and at least one surface of said film showing an anti-fogging property when exposed to two cycles of temperature rise and drop between 20.degree. C. and 40.degree. C., the temperature rises and drops occurring at 6 hour intervals.
- 2. A bag as claimed in claim 1, wherein at least one surface layer of the film shows an anti-fogging property when exposed to two cycles of temperature rise and drop between 0.degree. C. and 40.degree. C., the temperature rises and drops occurring at 6 hour intervals.
- 3. A bag according to claim 1, wherein the anti-fogging agent is contained in an amount of 0.3 to 3% by weight based on the total weight of the film.
- 4. A bag according to claim 1, wherein the anti-fogging agent is contained at least one surface layer in an amount of 0.3 to 3% by weight.
- 5. A bag according to claim 1, wherein the bag has at least one perforation provided on a part of or the entire surface of the walls, the total aperture area of which corresponds to 0.02 to 3.5% of the total surface area of the bag and is suitable for packaging vegetables and fruits which maintain vigorous physiological activities after harvesting.
- 6. A bag according to claim 1, wherein the bag has at least one cutout of 4 to 100 mm in length provided on its bottom side in such a manner that, not less than 50% of the length of the bottom side remains as a sealed are and is suitable for packaging vegetables and fruits which maintain vigorous physiological activities after harvesting.
Priority Claims (3)
Number |
Date |
Country |
Kind |
61-101741 |
May 1986 |
JPX |
|
61-160529 |
Jul 1986 |
JPX |
|
61-160530 |
Jul 1986 |
JPX |
|
Parent Case Info
This application is a divisional of Ser. No. 043,959 filed Apr. 29, 1987, U.S. Pat. No. 4,876,146.
US Referenced Citations (7)
Foreign Referenced Citations (1)
Number |
Date |
Country |
137454 |
Apr 1985 |
EPX |
Divisions (1)
|
Number |
Date |
Country |
Parent |
43959 |
Apr 1987 |
|