Environment-friendly starch adhesive for cementing corrugated boards at low temperature and preparation method of environment-friendly starch adhesive
A starch adhesive, corrugated board technology, applied in the directions of starch derived adhesives, adhesive additives, polymer adhesive additives, etc., can solve the problem of large, steam pressure of 6 to 7 kg for the production of three-layer boards, and five-layer boards. The steam pressure is as high as 8-9 kg, the bonding strength is decreased, and the steam pressure is high.
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Example Embodiment
[0030] Example 1
[0031] Add 20 parts (by weight) of starch and 70 parts (by weight) of water into the reactor, stir well, heat up to 40~45°C, add 0.1 part (by weight) of hydrogen peroxide, and react for 45 minutes to obtain oxidized starch, then add 0.9 part ( Weight) sodium hydroxide, track the viscosity of the paste, when the viscosity reaches 20 seconds, add 0.5 parts (weight) magnesium sulfate, 0.5 parts (weight) borax, 5 parts (weight) calcium carbonate, 2.5 parts (weight) urea-formaldehyde resin And 0.5 parts by weight of TX-10, and stir evenly to obtain a starch adhesive.
[0032] Application effect: This starch adhesive has strong initial tack. When the good cardboard is laminated with this adhesive, the steam pressure of the three-layer board machine is reduced from 7 kg to 5 kg, and the steam pressure of the five-layer board paper machine is reduced from 9 kg to 7 kg.
Example Embodiment
[0033] Example 2
[0034] Add 25 parts (weight) of starch and 65 parts (weight) of water into the reaction kettle, stir well, heat up to 40~45°C, add 0.05 parts (weight) of sodium persulfate, react for 30 minutes to obtain oxidized starch, then add 0.95 Parts (weight) of sodium hydroxide, track the viscosity of the paste, when the viscosity reaches 25 seconds, add 0.75 parts (weight) of magnesium sulfate, 0.75 parts (weight) of boric acid, 4 parts (weight) of heavy calcium, 3.5 parts (weight) Melamine formaldehyde resin and 0.5 parts (weight) of AEO-09 are stirred evenly to obtain starch adhesive.
[0035] Application effect: This starch adhesive has strong initial tack. When the good cardboard is laminated with this adhesive, the steam pressure of the three-layer board machine is reduced from 7 kg to 4 kg, and the steam pressure of the five-layer board machine is reduced from 9 kg to 6 kg.
Example Embodiment
[0036] Example 3
[0037] Add 20 parts (weight) of starch and 60 parts (weight) of water into the reactor, stir well, heat up to 40~45°C, add 0.1 part (weight) of potassium persulfate, react for 60 minutes to obtain oxidized starch, then add 0.9 Parts (by weight) of sodium hydroxide, tracking the viscosity of the paste, when the viscosity reaches 30 seconds, add 0.5 parts (by weight) of magnesium chloride, 0.5 parts (by weight) of boric acid, 5 parts (by weight) of calcium carbonate, 5 parts (by weight) of bentonite , 2.5 parts (by weight) of epoxy resin and 0.5 parts (by weight) of TX-10, stir evenly to obtain starch adhesive.
[0038] Application effect: This starch adhesive has a strong initial tack. When the good cardboard is laminated with this adhesive, the steam pressure of the three-layer board machine is reduced from 7 kg to 3.5 kg, and the steam pressure of the five-layer board machine is reduced from 9 kg to 5 kg.
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