Abstract: In one aspect, a protective headwear is provided and includes a headgear, an outer shell, a duct and a manifold. The headgear is configured to engage a wearer's head and at least partially support the protective headwear on a wearer's head. The headgear includes a front, a rear opposite the front, a right side, and a left side opposite the right side. The outer shell is coupled to the headgear at a coupling location and includes a shield positioned to the front of the headgear. The duct is at least partially coupled to and at least partially positioned in an interior of the outer shell. The duct is located below the coupling location.

Abstract: Disclosed is an adhesive that may include two or more starches or starch derivatives with different molecular weights. In many embodiments, the adhesive includes (1) unmodified or slightly thinned starch, (2) maltodextrin or syrup solid, and (3) a hydroxypropyl starch. In most embodiments, the adhesive includes a plasticizer. The adhesive may be prepared by blending the starch and starch derivatives, and cooking the blended slurry, preferably under acidic conditions. The adhesive may be employed for various purposes including as an adhesive for a multi-wall bag.

Abstract: Disclosed is an adhesive that may include two or more starches or starch derivatives with different molecular weights. In many embodiments, the adhesive includes (1) unmodified or slightly thinned starch, (2) maltodextrin or syrup solid, and (3) a hydroxypropyl starch. In most embodiments, the adhesive includes a plasticizer. The adhesive may be prepared by blending the starch and starch derivatives, and cooking the blended slurry, preferably under acidic conditions. The adhesive may be employed for various purposes including as an adhesive for a multi-wall bag.

Abstract: Disclosed is an adhesive that may include two or more starches or starch derivatives with different molecular weights. In many embodiments, the adhesive includes (1) unmodified or slightly thinned starch, (2) maltodextrin or syrup solid, and (3) a hydroxypropyl starch. In most embodiments, the adhesive includes a plasticizer. The adhesive may be prepared by blending the starch and starch derivatives, and cooking the blended slurry, preferably under acidic conditions. The adhesive may be employed for various purposes including as an adhesive for a multi-wall bag.

Abstract: Disclosed is an adhesive that may include two or more starches or starch derivatives with different molecular weights. In many embodiments, the adhesive includes (1) unmodified or slightly thinned starch, (2) maltodextrin or syrup solid, and (3) a hydroxypropyl starch. In most embodiments, the adhesive includes a plasticizer. The adhesive may be prepared by blending the starch and starch derivatives, and cooking the blended slurry, preferably under acidic conditions. The adhesive may be employed for various purposes including as an adhesive for a multi-wall bag.