Abstract: A pressing member including a pressing surface configured to form a strong-pressure seal zone of a packaging bag. The pressing surface includes a flat part configured to press a part adjacent to an inner edge of the strong-pressure seal zone, and an inclination part that is provided consecutively to the flat part and recedes from the flat part as the distance from the flat part increases.

Abstract: A packaging bag unsealed from a first side to a second side opposed to the first side, including: an inclination seal part (5) at a corner provided consecutively to the second side, wherein the inclination seal part (5) has a strong-pressure seal zone (7) along an inner edge (50) of the inclination seal part (5), the strong-pressure seal zone (7) being pressed by a higher pressing force than other parts of the inclination seal part (5), and being smaller in thickness than other parts of the inclination seal part (5). Also disclosed is a pressing member and a method for manufacturing the packaging bag.

Abstract: A packaging bag unsealed from a first side to a second side opposed to the first side, including: an inclination seal part (5) at a corner provided consecutively to the second side, wherein the inclination seal part (5) has a strong-pressure seal zone (7) along an inner edge (50) of the inclination seal part (5), the strong-pressure seal zone (7) being pressed by a higher pressing force than other parts of the inclination seal part (5), and being smaller in thickness than other parts of the inclination seal part (5). Also disclosed is a pressing member and a method for manufacturing the packaging bag.

Abstract: Provided is a packaging bag (1) in which a broken piece can be separated easily at the time of unsealing. In a packaging bag (1) in which unsealing is conducted from a sealed part (2) on an unsealing start side to a sealed part (4) on an unsealing terminal side via an accommodation part (3), an easily-openable part (10) is provided at the sealed part (2) on the unsealing start side, and an inner edge of the sealed part (4) on the unsealing terminal side is an inner edge inclined part (5u) that crosses an unsealing virtual straight line (12) linearly drawn in an unsealing direction from the easily-openable part (10) to the sealed part (4) on the unsealing terminal side via the accommodation part (3), and is inclined relative to the unsealing virtual straight line (12).

Abstract: Provided is a packaging bag (1) in which a broken piece can be separated easily at the time of unsealing. In a packaging bag (1) in which unsealing is conducted from a sealed part (2) on an unsealing start side to a sealed part (4) on an unsealing terminal side via an accommodation part (3), an easily-openable part (10) is provided at the sealed part (2) on the unsealing start side, and an inner edge of the sealed part (4) on the unsealing terminal side is an inner edge inclined part (5u) that crosses an unsealing virtual straight line (12) linearly drawn in an unsealing direction from the easily-openable part (10) to the sealed part (4) on the unsealing terminal side via the accommodation part (3), and is inclined relative to the unsealing virtual straight line (12).

Abstract: A snow-melting/antifreezing agent which comprises potassium silicate as an active ingredient and a snow-melting/antifreezing agent which comprises potassium silicate and a nitrite salt as active ingredients are disclosed. These snow-melting/antifreezing agents may optionally further contain an alkali metal salt and/or a lower alcohol. These snow-melting/antifreezing agents are safe for the environment and do not cause concrete to deteriorate. They not only have excellent capability to melt snow and ice and to prevent freezing, but also have high profitability and are easy to handle.

Abstract: A snow-melting/antifreezing agent which comprises potassium silicate as an active ingredient and a snow-melting/antifreezing agent which comprises potassium silicate and a nitrite salt as active ingredients are disclosed. These snow-melting/antifreezing agents may optionally further contain an alkali metal salt and/or a lower alcohol. These snow-melting/antifreezing agents are safe for the environment and do not cause concrete to deteriorate. They not only have excellent capability to melt snow and ice and to prevent freezing, but also have high profitability and are easy to handle.