Method for preparing higher-quality paper from waste compound paper source recycled paper pulp

A kind of composite paper, high technology, applied in the direction of synthetic cellulose/non-cellulose material pulp/paper, papermaking, waste product addition, etc., can solve the problems of bursting resistance, folding resistance, ring pressure, poor tearing degree, inability As a matter of preparation, etc., to achieve the effect of high overall cost

Inactive Publication Date: 2011-03-30

上海嘉龙纸业有限公司 +1

5 Cites 12 Cited by

AI-Extracted Technical Summary

Problems solved by technology

[0002] The production and application of waste paper source recycled pulp has a long history. With the development of society, the regeneration treatment and utilization technologies of various new waste papers are also changing rapidly. At present, from a new type of aluminum, plastic composite The so-called waste composite paper source regenerated pulp obtained from waste paper regeneration, compared with virgin pulp, its bursting strength, folding strength, ring pressure, tearing strength and other strength indicators are worse than that of virgi...

Abstract

The invention discloses a method for preparing higher-quality paper from waste compound paper source recycled paper pulp. The higher-quality paper is prepared by the following steps of: preparing waste compound paper source recycled paper pulp or/and sizing agent doped with polyvinyl alcohol fiber into paper; directly impregnating the paper on a paper machine into a colloid addition agent; and drying the mixture on the paper machine by a drying cylinder; or/and adding the colloid addition agent in a waste compound paper source recycled paper pulp blending tank in advance before making paper. The higher-quality paper is characterized by comprising the parameters that the burst index (kPa.m<2>/g) is more than 2.2, the tensile index (N.m/g) is more than 20, the tear index (mN.m<2>/g) is more than 4.0, the Cobb value [(60s)m<2>/g] is less than 30 and the fixed quantity (m<2>/g) is 30-100; and the varieties of the higher-quality paper comprise kraft paper, wrapping paper, non-setting adhesive base paper, glazed paper and base paper for laminating.

Application Domain

Waste product additionSynthetic cellulose/non-cellulose material pulp/paper

Technology Topic

PVA - Polyvinyl alcoholFiber +3

Examples

Experimental program(4)

Example Embodiment

[0025] Example 1.

[0026] A. Preparation of colloidal additives for spray impregnation of striped kraft paper, take:

[0027] Starch: 5-20 parts by weight (hereinafter referred to as parts),

[0028] AKD: 1 to 4 copies,

[0029] Polyvinyl alcohol: 1 to 2 parts,

[0030] Enzyme: proper amount (addition can be controlled within 0.002%~0.01% of starch weight),

[0031] Water: 400~650 (parts),

[0032]

[0033] Total: 407~676 (parts),

[0034] Solid content (weight percentage concentration): 1~6%;

[0035] PH value of material liquid: 5.5~6.5.

[0036] The glue additive liquid material can be heated in the stirring tank next to the production site, and then the glue additive liquid material is guided into the paper machine sizing and feeding tank through the pipeline.

[0037] B. Spray and impregnation construction on paper surface:

[0038] On a paper machine with a speed of 50~70m/min and a width of 1.5m, the waste composite paper source recycled pulp is made into a paper shape, and it is introduced into the dryer on the paper machine for heating and dehydration to obtain a moisture content of 6~ 15% (wt) of base paper, while the base paper is still on this machine, pass through the glue auxiliaries liquid material impregnation zone with spray tube set on the paper machine in turn, and then pass the dryer on the paper machine for the second time ( The moisture content is controlled at 6-9%), and finally the paper is rolled to make the kraft packaging paper commercial roll described in the present invention.

[0039] It should be noted that when spraying the dipping and sizing auxiliary liquid material, the temperature of the sprayed liquid material is controlled at 60-90°C, and the feed flow rate is controlled at: 200-300kg/h.

[0040] The output of this embodiment can reach 4.5-11 tons/day.

[0041] The quality parameters of the kraft packaging paper obtained in this embodiment can be controlled within the following ranges:

[0042] Bursting index kPa.m 2 /g>2.2,

[0043] Tearing index mN.m 2 /g>4.0,

[0044] Boost value (60s)m 2 /g: <30,

[0045] Moisture%: 6-9,

[0046] Quantitative m 2 /g 30~100.

Example Embodiment

[0047] Example 2.

[0048] A. Add colloidal additives to non-dry collagen pulp:

[0049] According to the weight ratio of: rosin glue/aluminum sulfate/paper pulp (dry basis) = 0.5/3/100, add the rosin glue and aluminum sulfate to the pulp batching pool and stir well for later use.

[0050] B. Preparation of colloidal additives for non-dry collagen paper surface spray impregnation, take:

[0051] Starch: 5-10 parts by weight (hereinafter referred to as parts),

[0052] Carboxyl styrene butadiene latex: 1 to 2 parts,

[0053] Enzyme: proper amount (addition can be controlled within 0.002%~0.01% of starch weight),

[0054] Water: 400~650 (parts),

[0055]

[0056] Total: 406~662 (parts),

[0057] Solid content (weight percentage concentration): 1~6%,

[0058] PH value of feed liquid: 6.5~7.

[0059] The glue additive liquid material can be heated in the stirring tank next to the production site, and then the glue additive liquid material is guided into the paper machine sizing and feeding tank through the pipeline.

[0060] C. Spray dipping construction on paper surface:

[0061] On a paper machine with a speed of 50~70m/min and a width of 1.5m, the waste composite paper source recycled pulp is made into a paper shape, and it is introduced into the dryer on the paper machine for heating and dehydration to obtain a moisture content of 6~ 30% (wt) of the base paper, while the base paper is still on this machine, pass through the glue auxiliaries liquid material impregnation zone with spray tube set on the paper machine in turn, and then pass through the dryer on the paper machine for the second time ( The moisture content is controlled at 6-9%), and finally the paper is rolled into the striped kraft paper commercial roll described in the invention.

[0062] It should be noted that when spraying the dipping and sizing auxiliary liquid material, the temperature of the sprayed liquid material is controlled at 60-90°C, and the feeding flow rate is controlled at: 200-300kg/h.

[0063] The output of this embodiment can reach 4.5-10 tons/day.

[0064] The quality parameters of the non-dry collagen paper obtained in this embodiment can be controlled within the following ranges:

[0065] Tensile index N.m/g>25,

[0066] Tearing index mN.m 2 /g>5.0,

[0067] Boost value (60s)m 2 /g: <30,

[0068] Moisture%: 6-9,

[0069] Quantitative m 2 /g 30~100.

Example Embodiment

[0070] Example 3.

[0071] A. Preparation of colloidal auxiliary material liquid used for coating or laminating base paper by spraying phytoline dipping, take:

[0072] 6-12 parts by weight of borax (hereinafter referred to as parts), add water to 600 parts for use, to obtain an aqueous solution with a weight percentage of 1%-2% of borax.

[0073] B. Preparation of colloidal auxiliary agent material solution impregnated with phyrin on the paper surface of base paper for coating and laminating, take:

[0074] Starch: 5-10 parts,

[0075] Ammonium persulfate: appropriate amount (such as 1%-3% of starch weight),

[0076] AKD: 0.5~1.0 copies

[0077] Polyvinyl alcohol: 1 part,

[0078] Water: 400~650 (parts),

[0079]

[0080] Total: 406~661 (parts),

[0081] Solid content (weight percentage concentration): 1~6%,

[0082] PH value of feed liquid: 6.5~7.

[0083] The glue additive liquid material can be heated in the stirring tank next to the production site to be prepared, and then the glue additive liquid material is guided into the paper machine sizing feeding tank through the pipeline.

[0084] C. Spray dipping construction on paper surface:

[0085] On a paper machine with a speed of 40-60m/min and a width of 1.5m, the composite waste composite paper source recycled pulp is made into a paper shape, and it is introduced into the dryer on the paper machine for heating and dehydration to obtain a moisture content of 10 ~20%(wt) of base paper, while the base paper is still on this machine, pass through the A-auxiliary liquid material impregnation zone with spray tube set on the paper machine in turn, and then pass the dryer on the paper machine for the second time ( The moisture content is controlled at 6-9%), and then it is impregnated with Group B colloidal liquid, and then dried by the dryer on the paper machine for the third time [the moisture content is controlled at 6-9% (wt)], and the paper is rolled and cost-effective. The commercial base paper roll suitable for film coating or laminating.

[0086] It should be noted that when spraying the dipping and sizing auxiliary liquid material, the temperature of the sprayed liquid material is controlled at 60-90°C, and the feeding flow rate is controlled at: 200-300kg/h.

[0087] The output of this embodiment can reach 3.5-8 tons/day.

[0088] The quality parameters of the base paper for the coating and laminating film obtained in this embodiment can be controlled within the following ranges:

[0089] Tensile index N.m/g>20,

[0090] Tearing index mN.m 2 /g>4.0,

[0091] Moisture%: 6-9,

[0092] Quantitative m 2 /g 30~100.

PUM

Property	Measurement	Unit
Burst index	>= 2.2	kPa·m²/g
Tear index	>= 4.0	m²·mN/g

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