subject: Pp Woven Bag [print this page] PP Woven Bag is a bag made of woven polypropylene, mostly made on milky white color or transparent for various granular, powder, pellet or flake product in food and chemical industry.But especially for rice grain industry, nowadays they prefer to use the colorful one because they believe it is more attractive and very useful to build their brand image in the rice market.The size and the strength of these bags are various, customable for customer needs. Its load capacity ranging from ten kilograms to one hundred kilograms.The fabric can be uncoated or coated and also we can insert a tube PE inner to give more protection to the product.This bag is printable using flexo gravure technology and also rotogravure technology by using PP extrude lamination as adhesive agent to put the identity or trademark of the product to be easily recognized in the market.
The pp woven bag includes two sidewalls with peripheral edges and the sidewalls being attached together along at least a portion of the peripheral edges. One or more additional sidewalls may be disposed within the bag, and these additional sidewalls may be connected to form an inner bag. Any inner bag sidewalls may be laminated to the outer bag sidewalls or hang loose from the outer bag sidewalls. One or more of the sidewalls may include an adhesive for adhering to an opposing sidewall or item in the bag, a thin perforated layer disposed over an adhesive, a line of perforations for tearing, and/or one or more perforations for venting. Furthermore, processes for manufacturing a storage bag are disclosed.
As described, the currently preferred embodiment of the composite material can utilize either raised protrusions, or raised land areas surrounding dimples, to prevent premature sticking of the adhesive to an adjacent surface. However, other forms of composite materials that include a non-adhesive material to control the tack of the adhesive and prevent the adhesive from attachment to an adjacent surface prior to the application of pressure may also be used in accordance with the present invention. Exemplary materials include, without limitation, release liners such as silicone coated paper or coatings, inks, varnish, particles (talc, calcium carbonate, starch, wax beads and the like), nonwovens, scrim and fibers which are mixed with or coated upon the adhesive. The adhesive and/or non-adhesive coatings can either be continuous or non-continuous (discrete). Solid, pressure activated adhesives can also be used including, without limitation, microencapsulated adhesives that are coated continuously or in discrete patterns onto a film. In the case of microencapsulated adhesives and the like, pressure is applied to rupture the surface of the microcapsules to bring the adhesive into contact with an adjacent surface. Additional details and further examples of such composite materials, and information on their manufacture, may be found in U.S. Pat. Nos. 5,662,758; 6,489,022; 5,871,607; 6,194,062; 5,965,235; 6,193,918; 6,602,454; U.S. Patent Application Publications 2003/0218274 A1 and 2004/0142159 A1. However, as would be known to one of skill in the art, other forms of composite materials having an adhesive disposed thereon could be used in accordance with the present invention including any material having an adhesive disposed continuously or discontinuously thereon.
