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Paper craft and paper

A papermaking process and paper technology, applied in paper, papermaking, textiles and papermaking, etc., can solve problems such as carcinogenicity, adverse effects of fluorescent whitening agents and dye raw materials on human health, achieve high visual whiteness, improve visual whiteness, The effect of high light scattering properties

Inactive Publication Date: 2017-01-11
HAINAN JINHAI PULP & PAPER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, fluorescent whitening agents and dye raw materials themselves have adverse effects on human health and are carcinogenic

Method used

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  • Paper craft and paper
  • Paper craft and paper
  • Paper craft and paper

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Preparation of modified GCC: Dilute the binder (cationic polyacrylamide, molecular weight 5 million) to a certain concentration of 10%, add GCC, and control the amount of binder added at 5kg / ton of GCC.

[0035] The slurry uses APMP slurry (without brighteners and dyes), and adds modified GCC to the APMP slurry (the amount of GCC in the modified GCC is 200% of the absolute dry slurry), and mixes evenly after adding the modified GCC Then add reinforcing agent (anionic guar gum, 10kg / ton of pulp), mix well, then add fixative (polyamide epichlorohydrin, 10kg / ton of pulp), mix well, and then make handmade paper.

Embodiment 2

[0048] Preparation of modified GCC: Dilute the binder (anionic polyacrylamide, molecular weight: 10 million) to a certain concentration of 0.1%, add GCC, and control the amount of binder added at 0.3kg / ton of GCC.

[0049] The slurry uses the same APMP slurry as in Example 1, and the modified GCC is added to the APMP slurry (the amount of GCC in the modified GCC is 800% of the dry slurry), and after adding the modified GCC and mixing evenly Add reinforcing agent (cationic starch, 40kg / ton of pulp), mix well, then add fixative (anionic polyacrylamide, molecular weight 5 million, 0.8kg / ton pulp), mix well, and then make paper by hand.

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Abstract

The invention discloses a papermaking method. The papermaking method comprises following steps: modified calcium carbonate is prepared; a binder and calcium carbonate are mixed with water so as to obtain a porous micro polymer via stacking of calcium carbonate particles with the binder; a slurry material is provided; modified calcium carbonate is added into the slurry material so as to completely or partly replace a flourescent brightener and a dye, and a reinforcing agent and a fixing agent are added; and the slurry material is subjected to paper making. The invention also provides paper prepared via the papermaking method. According to the papermaking method, modified calcium carbonate can be combined with the slurry material fiber firmly via addition of the reinforcing agent and the fixing agent; and vision whiteness of the slurry fiber is increased because of excellent whiteness and light scattering performance of calcium carbonate; so that paper with high vision whiteness can be prepared without dependence on conventional fluorescent brighting agents and influences on paper strength.

Description

technical field [0001] The invention relates to a papermaking process and the paper produced by using the same. Background technique [0002] At present, the method of increasing paper whiteness and apparent whiteness is mainly realized by adding optical brightener (OBA) or dye (Dye). The whitening principle of fluorescent whitening agent is: fluorescent whitening agent can not only reflect visible light, but also reflect ultraviolet rays into visible light, so that the dyed substance will produce purple-blue fluorescence after being excited by ultraviolet rays. The treated fiber will emit more visible light than the original, and because the added reflected light has blue and purple colors, it can offset the light yellow color of the pulp and play a complementary color effect, which can whiten the pulp with a certain whiteness. The whitening principle of dyes is: by adding dyes of various colors into the slurry, by absorbing and reflecting different light rays, the color o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H17/65D21H17/55
Inventor 韦丹秦昀昌郝妮周仁娟王威
Owner HAINAN JINHAI PULP & PAPER
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