COMPOSITION OF MATTER IN STOCK PREPARATION ZONE OF WET-LAID PROCESS

A composition obtained by combining virgin cellulose fibers， cellulose ester (CE) staple fibers having a denier per filament (DPF) of less than 3， and water， and water， and optional additives prepared or added to a hydropulper， first blend tank， processed through a refiner， in a second blend tank， or in a machine chest. The CE staple fibers can also have a short cut length of less than 6 mm and can be crimped. The compositions are useful to recycle broke to the stock preparation zone and can be processed back through a refiner. The compositions allow for high drainage rates through the wire， allowing flexibility in the refining to adjust refining energy and intensity. The compositions， when co-refined， are useful to make wet laid products such as paper， cardboard， and filters that have improved water drainage， air permeability， tensile strength， bulk， burst strength， or stiffness， or a combination of these properties.

本组合物由原生纤维素纤维（virgin cellulose fibers）、单丝纤度（denier per filament, DPF）小于3的纤维素酯（cellulose ester, CE）短纤维与水复配制得，还可添加可选添加剂；其制备或添加工序可在水力碎浆机（hydropulper）、第一配料罐中完成，也可经精浆机（refiner）处理，或在第二配料罐、机浆池（machine chest）中进行。该纤维素酯短纤维还可具有小于6mm的短切长度，并可带有卷曲结构。该组合物可将损纸（broke）回送至备料区（stock preparation zone）进行循环利用，并可经精浆机再次处理。该组合物可提升成形网（wire）的滤水速率，使得精浆过程中可灵活调节精浆能耗与精浆强度。该组合物经共同精浆（co-refined）后，可用于制备湿法成型制品（wet laid products），包括纸、硬纸板与过滤材料，所得产品可获得更优异的滤水性能、透气度、抗张强度、松厚度、耐破强度或挺度，或这些性能的任意组合。