METHOD FOR PRODUCING NANOFIBRILLAR CELLULOSE

In a method for producing nanofibrillar cellulose starting from cellulose pulp (P)， where cellulose is in native form， the cellulose pulp is prebeaten by circulating it in form of aqueous suspension of fibres through a refining gap (G) formed by opposite arrays of refining bars which perform relative movement in the gap. The cellulose pulp is circulated until a beating degree of below 55 ml CSF， preferably 50 ml CSF or less， more preferably 20 ml CSF or less is attained. The prebeaten pulp is forwarded to a disintegration process (2)， where the prebeaten pulp is disintegrated to nanofibrillar cellulose (NFC). In a method for producing nanofibrillar cellulose starting from cellulose pulp (P)， where cellulose is in native form， the cellulose pulp is prebeaten by circulating it in form of aqueous suspension of fibres through a refining gap (G) formed by opposite arrays of refining bars which perform relative movement in the gap. The cellulose pulp is circulated until a beating degree of below 55 ml CSF， preferably 50 ml CSF or less， more preferably 20 ml CSF or less is attained. The prebeaten pulp is forwarded to a disintegration process (2)， where the prebeaten pulp is disintegrated to nanofibrillar cellulose (NFC).

在一种以天然纤维素形态的纤维素浆粕（P）为原料制备纳米纤丝纤维素的方法中，将纤维素浆粕以纤维水悬浮液的形式循环通过由相对设置且在间隙内做相对运动的精磨棒阵列形成的精磨间隙（G），以此完成预精磨处理。持续循环该纤维素浆粕，直至其打浆度低于55 ml CSF，优选50 ml CSF及以下，更优选20 ml CSF及以下。随后将预精磨后的浆粕送入解离工序（2），在此工序中将预精磨浆粕解离为纳米纤丝纤维素（NFC）。
在一种以天然纤维素形态的纤维素浆粕（P）为原料制备纳米纤丝纤维素的方法中，将纤维素浆粕以纤维水悬浮液的形式循环通过由相对设置且在间隙内做相对运动的精磨棒阵列形成的精磨间隙（G），以此完成预精磨处理。持续循环该纤维素浆粕，直至其打浆度低于55 ml CSF，优选50 ml CSF及以下，更优选20 ml CSF及以下。随后将预精磨后的浆粕送入解离工序（2），在此工序中将预精磨浆粕解离为纳米纤丝纤维素（NFC）。