Two-sided offset paper for paper bags and preparation method of two-sided offset paper

A technology of double-adhesive paper and internal sizing, applied in the field of papermaking, can solve problems such as poor printing effect, and achieve the effects of reducing paper traction, improving printing performance, and reducing pressure light.

Inactive Publication Date: 2013-11-20
GOLD HUASHENG PAPER SUZHOU IND PARK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, paper bag paper is generally coated with coated cardboard and kraft paper. Coated paper is not suitable for food, clothing and other edible items that are in direct contact with the human body due to coating.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Paper basis weight is 50gsm

[0037] 1. Pulping

[0038] 100% bleached chemical pulp is used, the amount of hardwood bleached chemical pulp accounts for 70%, the amount of softwood bleached chemical pulp accounts for 20%, the high yield pulp accounts for 10%, and the Shore beating degree is 30°SR. Slurry (1 ton) was prepared after loose pulp, pulp cleaning, pulp refining or flaking, adding fiber modifying enzyme, 30ppm to pulp, and 45min treatment time.

[0039] 2. Add chemicals

[0040] Add alkyl ketene dimer (AKD) to the wet end, the consumption is 10 kg / ton of paper, alkenyl succinic anhydride (ASA) 0.5 kg / ton of paper, 150 kg / ton of filler, in this embodiment, the filler is precipitated carbonic acid Calcium or ground calcium carbonate, appropriate amount of starch enhancer. The appropriate amount here can be understood by those skilled in the art. 3. Surface sizing

[0041] Surface sizing starch coating amount 5g / m 2 .

[0042] 4. Post calendering

[0043] ...

Embodiment 2

[0046] Paper basis weight is 80gsm

[0047] 1. Pulping

[0048]100% bleached chemical pulp is used, the amount of hardwood bleached chemical pulp accounts for 75%, the amount of softwood bleached chemical pulp accounts for 15%, the high yield pulp accounts for 10%, and the Shore beating degree is 28°SR. Slurry (1 ton) is obtained after loose pulp, pulp cleaning, pulp refining or deflaking, adding fiber-modifying enzymes, and pulping at 40ppm for 30 minutes.

[0049] 2. Add chemicals

[0050] Add alkyl ketene dimer (AKD) to the wet end, the dosage is 9 kg / ton of paper, alkenyl succinic anhydride (ASA) 0.5 kg / ton of paper, 170 kg / ton of filler talcum powder.

[0051] 3. Surface sizing

[0052] Surface sizing starch coating amount 8g / m 2 .

[0053] 4. Post calendering

[0054] The pressure is controlled at 25kg / cm 2 .

[0055] The properties of the offset paper obtained in this example: the folding resistance is more than 200 times.

Embodiment 3

[0057] Paper base weight is 100gsm

[0058] 1. Pulping

[0059] 100% bleached chemical pulp is used, the amount of hardwood bleached chemical pulp accounts for 80%, the amount of softwood bleached chemical pulp accounts for 15%, and the high-yield pulp accounts for 5%. After loose pulp, pulp cleaning, pulp refining or deflaking, biological enzymes are added. , 80ppm to slurry, treatment time 60min, prepared slurry (1 ton).

[0060] 2. Add chemicals

[0061] Add alkyl ketene dimer (AKD) to the wet end, the dosage is 10 kg / ton of paper, alkenyl succinic anhydride (ASA) 0.8 kg / ton of paper, filler china clay 200 kg / ton of paper.

[0062] 3. Surface sizing

[0063] Surface sizing starch coating amount 10g / m 2 .

[0064] 4. Post calendering

[0065] The pressure is controlled at 30kg / cm 2 .

[0066] The performance of the offset paper obtained in this embodiment: the folding resistance is more than 150 times.

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Abstract

The invention provides a piece of two-sided offset paper for paper bags. The two-sided offset paper is prepared from raw materials including fiber pulp and chemical additives, wherein the fiber pulp comprises the following components in percentage by weight: 50-100 percent of broadleaf wood bleached chemical pulp, 0-50 percent of needlebush bleached chemical pulp and 0-30 percent of high-yield pulp, and the Schopper-Riegler degree is 23-36SR; the chemical additives include the following components in terms of kg/ton of paper: 70-500kg of packing and 8-20kg of an internal sizing agent. According to the two-sided offset paper provided by the invention, the matching and pulp grinding of fiber are adjusted by selecting the types of fibers in the production process, and the brooming degree of pulp grinding is improved; meanwhile, the pressure of calendaring at the rear stage is adjusted and is controlled to be 10-30kg/cm<2>, the surface properties of the paper are improved, and the strength is effectively improved; according to the novel two-sided offset paper for the paper bags, the folding endurance range is 100-500 times, and the pressure of a squeezing part of a paper machine is increased, so that the traction force of paper at the rear section is reduced, the calendaring degree of a curling part is reduced, the stiffness of the paper is improved, and finally the printing performance of terminal customers is improved.

Description

technical field [0001] The invention belongs to the technical field of papermaking, and in particular relates to offset paper suitable for paper bags and a preparation method thereof. Background technique [0002] At present, paper bag paper is generally coated with coated cardboard and kraft paper. Coated paper is not suitable for food, clothing and other edible items that are in direct contact with the human body due to coating. Kraft paper coated is not very good for printing. Therefore, it needs to be developed. A new type of paper bag double glue suitable for packaging various items, which is conducive to environmental protection and energy saving. [0003] The prior art discloses multiple offset papers. For example, Chinese application 201210162925.7 discloses an offset paper, which includes a base paper and a surface rubber layer formed on the surface of the base paper. Mixed pulp of long fiber and high-yield pulp, wherein the mass percentage of bleached chemical sho...

Claims

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Application Information

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IPC IPC(8): D21H15/10D21H21/16D21H17/67D21H17/68
Inventor 管新张家李陈汉彬李娟
Owner GOLD HUASHENG PAPER SUZHOU IND PARK
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