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Low quantitative coating type food package raw paper, and preparation method thereof

A food packaging and coating technology, applied in the field of papermaking, can solve problems that do not belong to green chemistry, circular economy, unsafe environmental protection, easy migration, etc., achieve good quality of printed products, meet finishing and processing requirements, coating high efficiency effect

Inactive Publication Date: 2019-08-23
ZHEJIANG HENGDA NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most of the food packaging papers on the market are fluorine-containing oil-proof paper, wax-coated paper and PE coated paper, but the fluorine-containing oil-proof agent used in this type of paper or the wax and coated plastic on the surface are synthetic polymers. Polymers have the disadvantages of being difficult to degrade, easy to migrate, unsafe and environmentally friendly, and do not belong to the development category of green chemistry and circular economy

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0031] A preparation method of low-weight coating type food packaging base paper, comprising the following steps:

[0032] Step 1: Add cationic starch with a degree of substitution of 0.02-0.04 into the PCC suspension, mix it evenly, and gelatinize it at 90°C to make the starch swell and form a partially cross-linked gel-like substance. After cooling at room temperature After dispersion treatment, the modified PCC coated with starch gel was obtained.

[0033] The dosage of cationic starch is 9-12% of the mass of PCC, and the gelatinization concentration of cationic starch and PCC suspension mixture is 7-10%; the average particle diameter of PCC is 2.4 μm, and the average particle diameter of PCC after starch coating and modification reaches 4.1-5.5μm.

[0034] Step 2: Mix and pulp bleached kraft needles and broad-leaf pulp, beat and pump to the pulping tank; add starch-coated PCC filler, mix well and pump to the pulping tank; add wet strength agent, fully After mixing, it is...

Embodiment 1

[0043] Step 1: Add cationic starch with a degree of substitution of 0.03 into the PCC suspension, mix well, and gelatinize it at 90°C to make the starch swell to form a partially cross-linked gel-like substance, which is dispersed after cooling at room temperature After treatment, the modified PCC coated with starch gel was obtained. The amount of cationic starch used is 9% of the mass of PCC, the gelatinization concentration of cationic starch and PCC suspension mixture is 7%; the average particle size of PCC is 2.4 μm, and the average particle size of PCC after starch coating and modification is 4.1 μm .

[0044] Step 2, mixing 30% bleached kraft softwood pulp and 70% bleached kraft broadleaf pulp by absolute dry mass ratio, and beating by double-disc mills after crushing. The beating method is short fiber viscous beating. The beating concentration is 4%, the pulp degree is 60°SR, and the wet weight is 2.5g. After the pulp is beaten, it is pumped to the pulping tank; the st...

Embodiment 2

[0049] Step 1: Add cationic starch with a degree of substitution of 0.04 into the PCC suspension, mix well, and gelatinize it at 90°C to swell the starch to form a partially cross-linked gel-like substance, which is then dispersed after cooling at room temperature After treatment, the modified PCC coated with starch gel was obtained. The amount of cationic starch used is 9% of the mass of PCC, the gelatinization concentration of cationic starch and PCC suspension mixture is 10%; the average particle size of PCC is 2.4 μm, and the average particle size of PCC after starch coating and modification is 4.5 μm .

[0050] Step 2, mixing 35% bleached kraft softwood pulp and 65% bleached kraft broadleaf pulp by absolute dry mass ratio, and beating by double-disc mills after crushing. The beating method is short fiber viscous beating. The beating concentration is 5%, the pulp degree is 65°SR, and the wet weight is 2.0g. After the pulp is beaten, it is pumped to the pulping tank; the s...

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Abstract

The invention discloses a low quantitative coating type food package raw paper, and a preparation method thereof. The preparation method comprises following steps: firstly, cationic starch is added into a PCC suspension solution, uniform mixing is carried out, then gelatinization is carried out so as to form a partically-crosslinked gel substance, and normal temperature cooling and dispersion treatment are carried out so as to obtain a starch coated PCC filling material; bleached sulfate softwood pulp, and bleached sulfate hardwood pulp are subjected to mixing pulping, the starch coated PCC filling material, a wet strength agent, a sizing agent, and a retention agent are added, and concentration adjusting, slag removing, and sieving are carried out so as to obtain a slurry for wet loadingpaper making; the slurry is subjected to fourdrinier dehydration moulding and squeezing, and pre-drying; and at last, paper surface glue applying, soft calendaring, and rolling are carried out to obtain a finished product. According to the preparation method, no expensive titanium dioxide is adopted as a filling material, production cost is low, the retention rate of the filling material and finefiber is high, environment pollution caused by white water discharge is reduced, the obtained paper is uniform, full width tightness is constant, paper surfaces are flat and fine, surface strength andwet tensile strength are high, and water based coating quality requirements are satisfied.

Description

technical field [0001] The invention relates to the technical field of papermaking, in particular to a low quantitative coating type food packaging base paper and a preparation method thereof. Background technique [0002] Food packaging paper is a packaging product with pulp or cardboard as the main raw material. It needs to meet the requirements of non-toxic, oil-resistant, waterproof, moisture-proof, airtight, etc., and the paper used for packaging food that meets the food packaging safety requirements. At present, most of the food packaging papers on the market are fluorine-containing oil-proof paper, wax-coated paper and PE coated paper, but the fluorine-containing oil-proof agent used in this type of paper or the wax and coated plastic on the surface are synthetic polymers. Polymers have the disadvantages of being difficult to degrade, easy to migrate, unsafe and environmentally friendly, and do not belong to the development category of green chemistry and circular eco...

Claims

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Application Information

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IPC IPC(8): D21H27/10D21H11/04D21H17/69D21H17/67D21H17/29D21H21/20D21H21/16D21H21/10D21H17/55D21H17/17D21H17/45D21H19/14
CPCD21H11/04D21H17/17D21H17/29D21H17/45D21H17/55D21H17/675D21H17/69D21H19/14D21H21/10D21H21/16D21H21/20D21H27/10
Inventor 伊财富丁济正程亚洲杨菊红张海波徐冰
Owner ZHEJIANG HENGDA NEW MATERIAL CO LTD
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