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Phyllosilicate slurry for papermaking

A technology of phyllosilicate and slurry, which is applied in the field of papermaking, can solve problems such as water filtration performance and retention performance that are not mentioned

Inactive Publication Date: 2007-07-04
MEADWESTVACO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

While the concentrate itself is mentioned, there is no mention of its enhanced drainage and retention properties compared to common bentonite systems starting from a dry powder

Method used

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  • Phyllosilicate slurry for papermaking
  • Phyllosilicate slurry for papermaking
  • Phyllosilicate slurry for papermaking

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] This example provides a comparison between the drainage rate of a standard fiber stock sample retention process using 10 lb / ton of the drainage and sizing aid of the present invention ("DSA157") and the use of the following aids: (1) Polymer Acrylamide flocculant retention aids such as Nalco 7530 or Cytec 4516; (2) silica filter aids, ie Eka Nobel NP320, and (3) particulates, ie Nalco 8678, lignosulfonate filter aids. The standard fiber stock sample was 20% broke, 70% hardwood and 10% pine at a stock consistency DDA of 1.1-1.2% and a pH of 4.1-4.3. Dilution water from the pan is provided by PM5 (no filter aid residue). The blend chest stock (raw CSF) was 650ml. Except for 10 lb / ton of DSA, all sample runs contained 20 lb / ton of alum slurry and 10 lb / T of size with rosin blended according to the invention in place of separately added sizing Type dispersant.

[0039] The results illustrated in the sample sample of Fig. 2 show that the raw material sample containing the...

Embodiment 2

[0041] In this example, the constant total amounts of alum and rosin size in the papermaking suspension were 10 lbs / ton size and 20 lbs / ton alum. Adjust the slurry and overall rosin to maintain this level. The slurry contains a different blend of rosin than the rosin size, but the amount of rosin in the suspension is always the same on a total solids basis. In some samples the whole rosin was with the stock in the papermaking suspension, in others it was split and 50% was added with the alum and 50% was provided from the stock. The results are shown in Figures 4-6.

[0042] In Figure 4, the columns are organized by filter aid. For example: "Split DSA 5" means 5 lbs / ton of bentonite in DSA, while the size is fed separately, 5 lbs / ton with DSA and 5 lbs / ton with amygdalin initially. "Nalco 8678 1 Rev" refers to 1 lb / ton N8678 filter aid, but feed in reverse order, filter aid first, flocculant after. "NP320 1" has 1 lb / ton of NP320 silica, "NP320 2" has 2 lb / ton of silica, an...

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Abstract

There is provided a slury of phyllosilicate-containing, material and a non-reactive, non-monomeric sizing agent, and water such that the final Hercules apparent viscosity of the slurry is below 100 cps. These slurries may have a solids content from 20 wt. % to 55 wt. % of solid phylloisilicate material. The addition of a phyllosilicate material to a combination of essentially non-reactive, non-monomeric rosin-derived sizing agent does not require the addition of an electrolyte and provides additional stability to rosin dispersions or dispersions of fine rosin particles. In another aspect of the invention there is provided a process of making paper by forming an aqueous cellulosic suspension, mixing a highly concentrated bentonite slurry into an cellulosic suspension, draining the cellulosic suspension to form a wet sheet and drying the wet sheet. A polymeric retention aid may be added to the cellulosic suspension during papermaking.

Description

[0001] Cross References to Related Applications [0002] This application is based on U.S. Provisional Application No. 60 / 749,220 filed December 9, 2005 and claims priority to that earlier application under 35 U.S.C. § 119(e), the contents of which are incorporated herein as refer to. technical field [0003] The present invention generally relates to slurries of aqueous phyllosilicate materials. More specifically, the present invention relates to a process for the manufacture of paper comprising the addition of surfactants with tall oil derivatives or rosin derived surfactants mixed into an aqueous cellulosic suspension. Blends of bentonite-containing slurries and formed paper. Background technique [0004] Bentonite slurries are used as coagents in the wet end of paper machines to enhance water removal and retain particulates during papermaking. Additionally, mineral fibers can be added to the pulp slurry to improve color, opacity, printability, and other properties. O...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H17/00D21H17/66D21H17/68D21H21/16D21H17/62
CPCD21H17/68D21H21/16D21H21/10D21H17/62
Inventor M·T·普洛夫L·W·霍斯
Owner MEADWESTVACO CORP
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