Abstract: The present invention provides a polyvinyl alcohol resin with which a polyvinyl acetal resin having a controlled particle size and forming less lumps during dissolution to exhibit excellent solubility can be produced. Provided is a polyvinyl alcohol resin containing: methyl acetate; a vinyl alcohol unit; and a vinyl acetate unit, the methyl acetate being contained in an amount of 0.05 to 3% by weight, the vinyl alcohol unit being contained in an amount of 80 to 99.5 mol %, the vinyl acetate unit having a mean chain length LA of 1 to 4.5, the vinyl alcohol unit having a mean chain length LO of 1 to 30.

Abstract: To make opening of a pour spout easier and two positively prevent inadvertent tearing for a packaging bag with pour spout which has a tube attached in the pour spout. A packaging bag 1 with pour spout wherein a flow path 11 in the pour spout 10 established in the top of a packaging bag 1 is partitioned off by sealed regions 5a, 7 made by sealing two films 2, 3, a tube 12 is attached in side of the flow path 11 of the pour spout 10, and opening guide line 14 which guides opening in a direction which intersects with the flow path 11 of the pour spout 10 is formed in one of the side seal regions 7 of the pour spout 10, and the seal region 5a on the other side which is opposite to the side of the pour spout 10 has a plurality of cut lines 16, 16, which pass through the seal region 5a of the two films 2, 3, and are positioned in line in relation to the ending region 14g of the opening guide line 14.

Abstract: To provide a pouch for storing granules which can smoothly pour out the granular content even when filled with various granules. A pouch for storing granules where the perimeter of a front and back pair of synthetic resin film are sealed, wherein: a pouring spout with an easily opened port is formed to protrude out from the top perimeter region of the pouch, and opening support member is placed at the pour spout, and the front and back pair of synthetic resin film are prevented from mutually contacting by the opening support member in the region where the opening support member is established and surrounding regions thereof, so that the opening of the pour spout is always maintained in an open condition.