Coated calcium carbonate for pitch and/or stickies control

A technology of calcium carbonate and adhesive, applied in pulp fat/resin/pitch/wax removal, coating, paper coating, etc., can solve problems such as paper web breakage, paper staining, machine stop, etc.

Active Publication Date: 2019-12-13
IMERTECH SAS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This can cause the web to break causing the machine to stop
Resins and adh

Method used

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  • Coated calcium carbonate for pitch and/or stickies control
  • Coated calcium carbonate for pitch and/or stickies control
  • Coated calcium carbonate for pitch and/or stickies control

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0083] Gustafsson test

[0084] The Gustafsson test described above was used to test the resinous oil control capabilities of the minerals described in Table 1.

[0085] The artificial resin oil used was dissolved in acetone (500cm 3 ) in rosin resin mixture A (rosin resin with a ring and ball softening point of 80°C and an acid value of 150mgKOH / g), rosin resin mixture B (a rosin with a ring and ball softening point of 65°C and an acid value of 150mgKOH / g resin) or rosin resin mixture C (rosin resin with a viscosity of 1000mPa.s and an acid value of 150mgKOH / g at 70°C) (by Lawter TM Provide) (30g), obtain artificial resin oil solution (0.06g cm -3 ). Protect from sunlight during storage.

[0086] The pulp was Botnia pulp (440 g) soaked overnight in filtered water (10 L). This was added to a Weverk type beater along with filtered water (12L). Run the beater for 15 minutes, then add a weight (5.568kg) to engage the bed, and run the beater for 55 minutes to get a Canadian...

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PUM

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Abstract

Use of a particulate mineral having a coating of one or more rosin acid(s) and/or one or more derivative(s) thereof as a pitch and/or stickies control agent in a composition comprising cellulosic pulp, a method of reducing dissolved and/or colloidal pitch and/or stickies in cellulosic pulp using said coated particulate mineral, said coated particulate mineral, a method of making said coated particulate mineral, a composition comprising cellulosic pulp and said coated particulate mineral and paper comprising said coated particulate mineral.

Description

technical field [0001] The present invention relates generally to the use of coated particulate minerals as a resinous and / or papermaking sizing agent in compositions comprising cellulose pulp. Coated granular minerals are coated with one or more abietic acids and / or one or more abietic acid derivatives. The invention also relates to said coated particulate minerals and methods for their manufacture. Background technique [0002] Papermaking generally involves breaking down a fiber source (such as wood, fiber crops, or waste paper) into its constituent fibers by chemical and / or mechanical and / or thermal treatments to produce cellulose pulp. During this pulping stage (and other steps in the papermaking process) a resinous compound called "pitch" present in the fiber source is released. The lipophilicity of these resinous compounds causes them to form colloidal droplets when suspended in water. As an alternative or in addition, synthetic (artificial) substances known as pap...

Claims

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Application Information

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IPC IPC(8): C09C1/02D21C9/08D21H19/00D21H21/02
CPCC09C1/3669C09C1/405C09C1/407C09C1/42C09C3/08C09C1/009C09C1/02C09C1/021C09C1/024C09C1/027C09C1/04C09C1/043C09C1/24C09C1/3063C09C1/346D21H21/02D21C9/08D21H17/62D21H17/675D21H17/68C01P2004/61C01P2004/62C01P2006/12C01P2006/22C09C3/10D21H17/74
Inventor A·芬德利J·斯卡洛普S·哈迪斯蒂D·威克斯J·普雷斯顿
Owner IMERTECH SAS
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