| 摘要 |
<p>PROBLEM TO BE SOLVED: To prevent a bag from being damaged due to steam to be generated at the time of heating in a microwave oven, improve feeling of food, and prevent sweating of moisture in foods and freeze-drying, by connecting a top side and right and left sides of a ventilative non-woven fabric positioned ranging the whole length of top sides of up and down sides of top and rear face films or ranging the whole length of the up and down sides to the top and rear face films by fusing. SOLUTION: At a top side of a top face film 1 whose up and down lengths are to be set shorter than that of a rear face film 2 of the top and rear face films 1 and 2 formed of a synthetic resin film which is non-ventilative and whose inside face can be fused, a bottom side of a plane ventilative non-woven fabric 3 is connected by fusion to the inside face of the top face film 1. Also, the right and left sides of the non-woven fabric 3 are connected by fusion to the right and left sides of the rear face film 2. For the non-woven fabric, a non-woven fabric made of a synthetic resin is suitable, and olefin, polyethylene, and polypropylene non-woven fabric can be selected. As it is put on a food filling line in a bag making state, one side of a bag is left unconnected. After the bag is filled with the food, the one side is connected by fusion so as to complete a product.</p> |
