Waterproof moisture-absorbing packaging paperboard

A technology for packaging cardboard and cardboard, applied in packaging paper, wrapping paper, packaging, etc., can solve the problems of hindering the outflow and evaporation of internal sewage, damage to internal products, limited waterproof effect, etc., to relieve environmental pressure, improve waterproof performance, The effect of improving the waterproof and moisture absorption performance

Active Publication Date: 2020-04-17

蚌埠大美印务有限公司

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AI-Extracted Technical Summary

Problems solved by technology

[0002] Corrugated cartons made of packaging cardboard are generally used for packaging and transportation of products. During transportation, if encountering rainy and snowy weather, the cartons are easily soaked, thereby causing damage to the internal products. In the prior art, this type of packaging cardboard The waterproofing treatment is generally just impregnated with waterproofing agent during the pulp production process, the waterproofing effect is limited, and once the sewage enters the inside of the carton, the original waterproofing agent added to the cardboard will become an obstacle to the outflow and evaporation of the internal sewage, and the ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine

Abstract

The invention belongs to the field of packaging paperboard preparation, specifically to a waterproof moisture-absorbing packaging paperboard. The packaging paperboard comprises an outer paperboard, corrugated paper and an inner paperboard which are sequentially arranged from outside to inside. The outer paperboard is soaked in a paraffin solution, and the outer side of the outer paperboard is coated with a water repellent agent. The inner paperboard is prepared from, by mass, 60-90 parts of straw powder, 5-6 parts of straw carbon and 5.5-8.5 parts of a reinforcing agent. According to the waterproof and moisture-absorbing packaging paperboard and a preparation method thereof, outer layer waterproofing and internal adsorption are combined, so waterproof and moisture-absorbing performances are improved; and the straw which is easy to obtain and low in price is adopted as a raw material, so the straw which is waste is recycled, and production cost is reduced.

Application Domain

Flexible coversWrappers +5

Technology Topic

Paraffin waxWaste material +4

Examples

Experimental program(7)
Effect test(1)

Example Embodiment

[0024] Example 1

[0025] (1) The straw is divided into three batches for impurity removal and cleaning, and then cut into sections and crushed to obtain straw powder. Two parts of straw powder are placed in a pulper to be crushed and pulped to obtain a straw slurry; the obtained straw slurry is heated to 150 ℃, take a portion of straw pulp and send it to the corrugated paper double-sided machine to make corrugated paper;

[0026] (2) Take another portion of straw pulp, dry it and immerse it in a 0.005wt% paraffin wax solution with ethanol as a solvent for 60-80 minutes at 60-70°C to obtain the outer cardboard pulp; dry the outer cardboard pulp in a paper machine Forming, get outside cardboard base paper.

[0027] (3) Coat the hydrophobic agent uniformly on one side of the base paper of the outer cardboard, and then repeat the coating several times after drying until the thickness of the hydrophobic agent on the surface is 0.4 mm to obtain the outer cardboard.

[0028] (4) Take part of the straw powder in the last part and place it in a carbonization furnace after drying, keep it at 820℃ for 2h under a nitrogen atmosphere, and cool to room temperature naturally to obtain straw charcoal; take the remaining straw powder and place it in the reactor , Hydrothermally heat at 250°C for 10 hours, then add potassium hydroxide powder to the reacted straw powder, mix uniformly, and perform pretreatment to obtain pretreated straw powder.

[0029] (5) Take 5 parts of straw charcoal obtained in step (4) and mix with 75 parts of pretreated straw powder, then add 7 parts of reinforcing agent and place it in a pulper for crushing and pulping to obtain inner card pulp. The pulp is dried in a paper machine to form an inner jam.

[0030] (6) The outer cardboard and the inner cardboard are pressed, cut, and bonded with the side coated with the hydrophobic agent facing outwards.

Example Embodiment

[0031] Example 2

[0032] (1) The straw is divided into three batches for impurity removal and cleaning, and then cut into sections and crushed to obtain straw powder. Two parts of straw powder are placed in a pulper to be crushed and pulped to obtain a straw slurry; the obtained straw slurry is heated to 150 ℃, take a portion of straw pulp and send it to the corrugated paper double-sided machine to make corrugated paper;

[0033] (2) Take another portion of straw pulp, dry it and immerse it in a 0.005wt% paraffin wax solution with ethanol as a solvent for 60-80 minutes at 60-70°C to obtain the outer cardboard pulp; dry the outer cardboard pulp in a paper machine Forming, get outside cardboard base paper.

[0034] (3) Coat the hydrophobic agent uniformly on one side of the base paper of the outer cardboard, and then repeat the coating several times after drying until the thickness of the hydrophobic agent on the surface is 0.2 mm to obtain the outer cardboard.

[0035] (4) Take part of the straw powder in the last part and place it in a carbonization furnace after drying, keep it at 820℃ for 2h under a nitrogen atmosphere, and cool to room temperature naturally to obtain straw charcoal; take the remaining straw powder and place it in the reactor , Hydrothermally heat at 250°C for 10 hours, then add potassium hydroxide powder to the reacted straw powder, mix uniformly, and perform pretreatment to obtain pretreated straw powder.

[0036] (5) Take 5 parts of straw charcoal obtained in step (4) and mix with 75 parts of pretreated straw powder, then add 7 parts of reinforcing agent and place it in a pulper for crushing and pulping to obtain inner card pulp. The pulp is dried in a paper machine to form an inner jam.

[0037] (6) The outer cardboard and the inner cardboard are pressed, cut, and bonded with the side coated with the hydrophobic agent facing outwards.

Example Embodiment

[0038] Example 3

[0039] (1) The straw is divided into three batches for impurity removal and cleaning, and then cut into sections and crushed to obtain straw powder. Two parts of straw powder are placed in a pulper to be crushed and pulped to obtain a straw slurry; the obtained straw slurry is heated to 150 ℃, take a portion of straw pulp and send it to the corrugated paper double-sided machine to make corrugated paper;

[0040] (2) Take another portion of straw pulp, dry it and immerse it in a 0.005wt% paraffin wax solution with ethanol as a solvent for 60-80 minutes at 60-70°C to obtain the outer cardboard pulp; dry the outer cardboard pulp in a paper machine Forming, get outside cardboard base paper.

[0041] (3) The hydrophobic agent is evenly coated on one side of the base paper of the outer cardboard, and the coating is repeated several times after drying, until the thickness of the hydrophobic agent on the surface is 0.5 mm after drying to obtain the outer cardboard.

[0042] (4) Take part of the straw powder in the last part and place it in a carbonization furnace after drying, keep it at 820℃ for 2h under a nitrogen atmosphere, and cool to room temperature naturally to obtain straw charcoal; take the remaining straw powder and place it in the reactor , Hydrothermally heat at 250°C for 10 hours, then add potassium hydroxide powder to the reacted straw powder, mix uniformly, and perform pretreatment to obtain pretreated straw powder.

[0043] (5) Take 5 parts of straw charcoal obtained in step (4) and mix with 75 parts of pretreated straw powder, then add 7 parts of reinforcing agent and place it in a pulper for crushing and pulping to obtain inner card pulp. The pulp is dried in a paper machine to form an inner jam.

[0044] (6) The outer cardboard and the inner cardboard are pressed, cut, and bonded with the side coated with the hydrophobic agent facing outwards.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine

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PUM

Property	Measurement	Unit
Thickness	0.2 ~ 0.5	mm
tensile		MPa
Particle size		Pa
strength	10

Description & Claims & Application Information

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the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine

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Classification and recommendation of technical efficacy words

Improve adsorption performance
Improve waterproof performance

Waterproof moisture-absorbing packaging paperboard

AI-Extracted Technical Summary

Problems solved by technology

Abstract

Examples

Example Embodiment

Example Embodiment

Example Embodiment

PUM

Description & Claims & Application Information

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