Retention aid and method for producing paper using same

A manufacturing method and technology of retention aids, applied in the direction of addition of retention aids, papermaking, paper, etc., can solve the problems of reducing the uniformity of paper thickness, complicated operability of paper machines, and increasing the total addition amount
CN105612288BActive Publication Date: 2019-03-19SOMAR CORP
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SOMAR CORP
Publication Date
2019-03-19

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Abstract

Provided are a retention aid and a method for producing paper by using the same which make it possible to produce paper having a high filler content and having the filler uniformly dispersed therein, without sacrificing paper-production-step operability or paper formation properties, regardless of paper type. This method involves adding the following retention aid to a pulp-containing aqueous slurry before and / or after passage through a screen: a retention aid containing a cationic or anionic polymer compound having a viscosity-average molecular weight of over 35,000,000, wherein the cationic or anionic charge density in the cationic or anionic polymer compound is 0.6-4.0 meq / g.
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Description

technical field

[0001] The present invention relates to a retention aid capable of producing a large amount of paper containing and uniformly dispersed waste paper and fillers regardless of the type of paper without impairing the workability in the papermaking process and the texture and physical properties of paper, and the production of paper using the same method Background technique

[0002] In recent years, due to environmental problems such as global warming and efficient use of resources, pulp made from recycled waste paper has been used in large quantities. As paper to be recycled, for example, in addition to newspapers, magazines, carbon paper, corrugated cardboard, etc., shredded paper called shredder dust from offices and the like is increasing recently.

[0003] In general, since recycled pulp has a shorter pulp fiber length than virgin pulp, a retention aid is usually used in order to increase the total retention rate when using recycled pulp to make paper. Th...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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