CN112677574A - Moisture-proof and mildew-proof paper tube and preparation method thereof - Google Patents
Moisture-proof and mildew-proof paper tube and preparation method thereof Download PDFInfo
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- CN112677574A CN112677574A CN202011540709.2A CN202011540709A CN112677574A CN 112677574 A CN112677574 A CN 112677574A CN 202011540709 A CN202011540709 A CN 202011540709A CN 112677574 A CN112677574 A CN 112677574A
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- 239000000853 adhesive Substances 0.000 claims abstract description 43
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- 238000012545 processing Methods 0.000 claims abstract description 7
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical class O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims description 40
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- 239000004354 Hydroxyethyl cellulose Substances 0.000 claims description 23
- 229920000663 Hydroxyethyl cellulose Polymers 0.000 claims description 23
- 125000002091 cationic group Chemical group 0.000 claims description 23
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- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 22
- 239000002562 thickening agent Substances 0.000 claims description 22
- 239000000203 mixture Substances 0.000 claims description 20
- 230000002335 preservative effect Effects 0.000 claims description 18
- 238000000576 coating method Methods 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 16
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- -1 salt modified bentonite Chemical class 0.000 claims description 14
- 239000000463 material Substances 0.000 claims description 12
- 229920002261 Corn starch Polymers 0.000 claims description 11
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- QFOHBWFCKVYLES-UHFFFAOYSA-N Butylparaben Chemical compound CCCCOC(=O)C1=CC=C(O)C=C1 QFOHBWFCKVYLES-UHFFFAOYSA-N 0.000 claims description 10
- CQEYYJKEWSMYFG-UHFFFAOYSA-N butyl acrylate Chemical compound CCCCOC(=O)C=C CQEYYJKEWSMYFG-UHFFFAOYSA-N 0.000 claims description 10
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- 229940043351 ethyl-p-hydroxybenzoate Drugs 0.000 claims description 10
- NUVBSKCKDOMJSU-UHFFFAOYSA-N ethylparaben Chemical compound CCOC(=O)C1=CC=C(O)C=C1 NUVBSKCKDOMJSU-UHFFFAOYSA-N 0.000 claims description 10
- 238000005498 polishing Methods 0.000 claims description 10
- 229920000139 polyethylene terephthalate Polymers 0.000 claims description 10
- 239000005020 polyethylene terephthalate Substances 0.000 claims description 10
- 239000000758 substrate Substances 0.000 claims description 9
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- 239000012266 salt solution Substances 0.000 claims description 6
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 5
- 239000012153 distilled water Substances 0.000 claims description 5
- 239000012065 filter cake Substances 0.000 claims description 5
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- 238000010438 heat treatment Methods 0.000 claims description 5
- 238000007731 hot pressing Methods 0.000 claims description 5
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- 238000005406 washing Methods 0.000 claims description 5
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- 239000003795 chemical substances by application Substances 0.000 claims description 2
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical group O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 claims description 2
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Abstract
The invention provides a damp-proof and mildew-proof paper tube and a preparation method thereof, belonging to the technical field of paper tube processing. The moisture-proof and mildew-proof paper tube has good moisture-proof and mildew-proof effects, and can improve the quality and prolong the service life of the paper tube; the adhesive can be used as a composite layer of the PET film and also has the functions of mould prevention and moisture prevention, and the PET film layer is used as the outermost layer and can prevent the inner-layer paper tube from being affected with damp and mildewed; the moisture-proof and mildew-proof paper tube has the advantages of simple preparation process and wide source, and is suitable for large-scale industrial popularization and application.
Description
Technical Field
The invention belongs to the technical field of paper tube processing, and particularly relates to a moisture-proof and mildew-proof paper tube and a preparation method thereof.
Background
The paper tube is a tubular object processed by paper, and most of the paper tubes are spiral paper tubes and seamless paper tubes. The paper roll is mainly used as a liner of the paper roll, and is convenient to package and use. The paper tube is prepared by a paper winding machine, the stock paper is wound on a tube winding die, and the paper tube is formed by rotating the tube winding die.
The main raw material of the paper tube is paper pulp which is easy to absorb water, and the paper tube becomes soft after absorbing water and being affected with damp, so that the normal use of the paper tube is affected, and therefore the paper tube is required to have a certain damp-proof function; in addition, the paper tube may mildew under humid and airtight conditions, and the mildew may affect the quality and use of the paper tube, so that the paper tube is required to have certain mildew-proof effect.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides the moisture-proof and mildew-proof paper tube and the preparation method thereof, and the moisture-proof and mildew-proof paper tube has better moisture-proof and mildew-proof effects, can improve the quality of the paper tube and can prolong the service life of the paper tube; the moisture-proof and mildew-proof paper tube has the advantages of simple preparation process and wide source, and is suitable for large-scale industrial popularization and application.
In order to achieve the purpose, the invention is realized by the following technical scheme: the utility model provides a dampproofing mould proof paper pipe, dampproofing mould proof paper pipe substrate surface is equipped with mould proof layer and dampproof course in proper order, mould proof layer is the coating that the gluing agent is constituteed, the dampproof course is the PET thin layer. The adhesive can be used as a composite layer of the PET film and also has the functions of mould prevention and moisture prevention, and the PET film layer is used as the outermost layer and can prevent the inner-layer paper tube from being damped and mildewed.
Further, the adhesive comprises the following components in parts by weight: 10-15 parts of corn starch, 5-10 parts of butyl acrylate, 1-5 parts of preservative, 1-5 parts of thickening agent, 5-10 parts of emulsifier, 1-5 parts of dispersing agent and 65-85 parts of deionized water.
Further, the preservative is prepared by dissolving a mixture of ethyl p-hydroxybenzoate and butyl p-hydroxybenzoate in a mass ratio of 1:1-2.5 in ethanol, wherein the volume ratio of the mixture of ethyl p-hydroxybenzoate and butyl p-hydroxybenzoate to ethanol is 1: 1-1.5. The preservative can enable the adhesive to have a preservative effect, so that the adhesive has a preservative effect on paper tubes, the ethyl p-hydroxybenzoate and the butyl p-hydroxybenzoate can damage cell membranes of microorganisms, enable proteins of the microorganisms to be denatured, and can inhibit the activity of respiratory enzymes of cells, and the ethyl p-hydroxybenzoate and the butyl p-hydroxybenzoate are dissolved in ethanol and can be dissolved in water.
Further, the thickening agent is cationic hydroxyethyl cellulose modified bentonite.
Further, the weight ratio of the bentonite to the cationic hydroxyethyl cellulose is 1: 0.3-0.5.
Further, the preparation method of the thickening agent comprises the following steps:
(1) grinding and screening bentonite to obtain bentonite particles with the particle size of 50-100 mu m;
(2) placing the bentonite particles obtained in the step (1) into a sodium chloride salt solution with the mass concentration of 5-15%, stirring for 2-4 h, keeping the temperature of the solution at 65-85 ℃, removing the filtrate after the reaction is finished, washing the filter cake to be neutral by using distilled water, baking for 6-8 h at the temperature of 120-140 ℃, and grinding the obtained product to obtain salt modified bentonite particles with the particle size of 50-100 mu m;
(3) and (3) adding cationic hydroxyethyl cellulose in a weight ratio into the salt modified bentonite particles prepared in the step (2), continuously stirring for 1-2 h at the temperature of 65-75 ℃, naturally cooling after the reaction is finished, and grinding to obtain the cationic hydroxyethyl cellulose modified bentonite with the particle size of 50-100 mu m. The cationic hydroxyethyl cellulose can be used as a hydrophilic thickener, the bentonite is an inorganic thickener, sodium ions contained in the bentonite can be removed after the bentonite is modified by a salt solution, the adsorption capacity of the bentonite can be enhanced, the cationic hydroxyethyl cellulose is used for modifying the bentonite, cations in the bentonite, such as calcium, magnesium, aluminum and the like, can be exchanged, the bentonite can be further activated, and the adsorption capacity of the bentonite can be enhanced; and the cationic hydroxyethyl cellulose is compounded with the bentonite, so that the roughness of the bentonite can be reduced, the adhesive is smoother, and the roughness of the surface of the paper tube is obviously improved.
Further, the emulsifier is polyoxyethylene 20 sorbitan monooleate, and the dispersing agent is talcum powder.
The invention also provides a preparation method of the moisture-proof and mildew-proof paper tube, and the preparation method of the moisture-proof and mildew-proof paper tube comprises the following processing steps:
(1) preparing an adhesive: adding deionized water in a mass ratio into a container, heating the container to 60-85 ℃, keeping the temperature, adding a preservative, a thickening agent and an emulsifier in a mass ratio into the container, and stirring for 1.5-2 h to uniformly mix the materials; then adding a dispersant in a mass ratio, dropwise adding butyl acrylate in a weight ratio, continuously stirring the mixture in the dropwise adding process, continuously stirring and reacting for 4-6 h after the dropwise adding is finished, adding corn starch in a mass ratio after the reaction is finished, stirring and reacting for 1.5-2 h, and naturally cooling to room temperature after the reaction is finished to obtain the adhesive;
(2) polishing the surface of the preliminarily molded paper tube by using a polishing machine, and removing surface impurities to obtain a paper tube base material layer;
(3) coating an adhesive on the surface of the paper tube base material layer by adopting a roll coating method, baking for 0.5 h at 75-100 ℃ to obtain a mildew-proof layer, taking out the mildew-proof layer, and adding a PET film on the surface of the mildew-proof layer by adopting a heat sealing machine, wherein the hot-pressing time is 0.5 s, the heat-sealing pressure is 0.1-0.2 MPa, and the heat-sealing temperature is 110-135 ℃, so as to obtain the moisture-proof layer. In the preparation process of the adhesive, other substances are uniformly mixed, and then the corn starch is added, so that the substances are partially compounded on the cross-linked body, and the viscosity of the adhesive can be further enhanced on extrusion for keeping the performance of the adhesive; after the adhesive is coated, the PET film layer is added after the adhesive is baked to be in a semi-dry state, and the adhesive has viscosity to the PET film and can further enhance the adhesion to the PET film.
Further, the thickness of the mildew-proof layer in the step (2) is 15-25 μm.
Further, the thickness of the moisture-proof layer in the step (3) is 10-50 μm.
Has the advantages that: compared with the prior art, the invention has the following advantages: according to the dampproof and mildewproof paper tube and the preparation method thereof, the dampproof and mildewproof paper tube has a good dampproof and mildewproof effect, the quality of the paper tube can be improved, and the service life of the paper tube can be prolonged; the adhesive can be used as a composite layer of the PET film and also has the functions of mould prevention and moisture prevention, and the PET film layer is used as the outermost layer and can prevent the inner-layer paper tube from being affected with damp and mildewed; the moisture-proof and mildew-proof paper tube has the advantages of simple preparation process and wide source, and is suitable for large-scale industrial popularization and application.
Drawings
Fig. 1 is a structural diagram of a damp-proof and mildew-proof paper tube of the present invention.
In the figure: 1 paper tube substrate, 2 mould proof layers, 3 dampproof layers.
Detailed Description
The invention is further illustrated with reference to the following figures and specific examples.
Example 1
As shown in fig. 1, a mould proof layer 2 and a moisture proof layer 3 are sequentially arranged on the surface of a substrate 1 of the mould proof moisture proof paper tube, the mould proof layer 2 is a coating formed by an adhesive, and the moisture proof layer 3 is a PET film layer; the adhesive comprises the following components in parts by weight: 10 parts of corn starch, 5 parts of butyl acrylate, 1 part of preservative, 1 part of thickening agent, 5 parts of emulsifier, 1 part of dispersant and 65 parts of deionized water.
Wherein the preservative can be prepared by dissolving a mixture of ethyl p-hydroxybenzoate and butyl p-hydroxybenzoate in ethanol at a mass ratio of 1: 1; the volume ratio of the mixture of ethyl p-hydroxybenzoate and butyl p-hydroxybenzoate to ethanol can be 1:1. The thickener may be cationic hydroxyethyl cellulose modified bentonite. The weight ratio of the bentonite to the cationic hydroxyethyl cellulose is preferably 1: 0.3. The emulsifier is preferably polyoxyethylene 20 sorbitan monooleate, and the dispersant is preferably talc.
In addition, the preparation method of the thickener is as follows:
(1) grinding and screening bentonite to obtain bentonite particles with the particle size of 50 mu m;
(2) placing the bentonite particles obtained in the step (1) into a sodium chloride salt solution with the mass concentration of 5%, stirring for 2 h, keeping the temperature of the solution at 65 ℃, removing a filtrate after the reaction is finished, washing a filter cake to be neutral by using distilled water, baking for 6h at 120 ℃, and grinding the obtained product to obtain salt modified bentonite particles with the particle size of 50 mu m;
(3) and (3) adding cationic hydroxyethyl cellulose in a weight ratio into the salt modified bentonite particles prepared in the step (2), continuously stirring for 1 h at 65 ℃, naturally cooling after the reaction is finished, and grinding to obtain the cationic hydroxyethyl cellulose modified bentonite with the particle size of 50 microns.
Example 2
As shown in fig. 1, a mould proof layer 2 and a moisture proof layer 3 are sequentially arranged on the surface of a substrate 1 of the mould proof moisture proof paper tube, the mould proof layer 2 is a coating formed by an adhesive, and the moisture proof layer 3 is a PET film layer; the adhesive comprises the following components in parts by weight: 15 parts of corn starch, 10 parts of butyl acrylate, 5 parts of preservative, 5 parts of thickening agent, 10 parts of emulsifier, 5 parts of dispersant and 85 parts of deionized water.
Wherein the preservative can be prepared by dissolving a mixture of ethyl p-hydroxybenzoate and butyl p-hydroxybenzoate with a mass ratio of 1: 2.5 in ethanol; the volume ratio of the mixture of ethyl and butyl parabens to ethanol can be 1: 1.5. The thickener may be cationic hydroxyethyl cellulose modified bentonite. The weight ratio of the bentonite to the cationic hydroxyethyl cellulose is preferably 1: 0.5. The emulsifier is preferably polyoxyethylene 20 sorbitan monooleate, and the dispersant is preferably talc.
In addition, the preparation method of the thickener is as follows:
(1) grinding and screening bentonite to obtain bentonite particles with the particle size of 100 mu m;
(2) placing the bentonite particles obtained in the step (1) into a sodium chloride salt solution with the mass concentration of 15%, stirring for 4h, keeping the temperature of the solution at 85 ℃, removing a filtrate after the reaction is finished, washing a filter cake to be neutral by using distilled water, baking for 8 h at 140 ℃, and grinding the obtained product to obtain salt modified bentonite particles with the particle size of 100 mu m;
(3) and (3) adding cationic hydroxyethyl cellulose in a weight ratio into the salt modified bentonite particles prepared in the step (2), continuously stirring for 2 h at 75 ℃, naturally cooling after the reaction is finished, and grinding to obtain the cationic hydroxyethyl cellulose modified bentonite with the particle size of 100 microns.
Example 3
As shown in fig. 1, a mould proof layer 2 and a moisture proof layer 3 are sequentially arranged on the surface of a substrate 1 of the mould proof moisture proof paper tube, the mould proof layer 2 is a coating formed by an adhesive, and the moisture proof layer 3 is a PET film layer; the adhesive comprises the following components in parts by weight: 13 parts of corn starch, 7 parts of butyl acrylate, 3 parts of preservative, 3 parts of thickening agent, 7 parts of emulsifier, 3 parts of dispersant and 75 parts of deionized water.
Wherein the preservative can be prepared by dissolving a mixture of ethyl p-hydroxybenzoate and butyl p-hydroxybenzoate in ethanol at a mass ratio of 1: 1.7; the volume ratio of the mixture of ethyl and butyl parabens to ethanol can be 1: 1.3. The thickener may be cationic hydroxyethyl cellulose modified bentonite. The weight ratio of the bentonite to the cationic hydroxyethyl cellulose is preferably 1: 0.4. The emulsifier is preferably polyoxyethylene 20 sorbitan monooleate, and the dispersant is preferably talc.
In addition, the preparation method of the thickener is as follows:
(1) grinding and screening bentonite to obtain bentonite particles with the particle size of 75 mu m;
(2) placing the bentonite particles obtained in the step (1) into a sodium chloride salt solution with the mass concentration of 10%, stirring for 3 h, keeping the temperature of the solution at 75 ℃, removing a filtrate after the reaction is finished, washing a filter cake to be neutral by using distilled water, baking for 7 h at 130 ℃, and grinding the obtained product to obtain salt modified bentonite particles with the particle size of 75 microns;
(3) and (3) adding cationic hydroxyethyl cellulose in a weight ratio into the salt modified bentonite particles prepared in the step (2), continuously stirring for 1.5h at 70 ℃, naturally cooling after the reaction is finished, and grinding to obtain the cationic hydroxyethyl cellulose modified bentonite with the particle size of 75 microns.
Example 4
The invention provides a preparation method of a damp-proof and mildew-proof paper tube, which is used for preparing the damp-proof and mildew-proof paper tube in the embodiment 1 and comprises the following processing steps:
(1) preparing an adhesive: adding 65 parts of deionized water into a container, heating the container to 60 ℃, keeping the temperature, adding 1 part of preservative, 1 part of thickening agent and 5 parts of emulsifier into the container, and stirring for 1.5 hours to uniformly mix the materials; then adding 1 part of dispersing agent, dropwise adding 5 parts of butyl acrylate, continuously stirring the mixture in the dropwise adding process, continuously stirring and reacting for 4 hours after the dropwise adding is finished, adding 10 parts of corn starch after the reaction is finished, stirring and reacting for 1.5 hours, and naturally cooling to room temperature after the reaction is finished to obtain the adhesive;
(2) polishing the surface of the preliminarily molded paper tube by using a polishing machine, and removing surface impurities to obtain a paper tube base material 1;
(3) the method comprises the steps of coating an adhesive on the surface of a paper tube substrate 1 by adopting a roll coating method, baking for 0.5 h at 75 ℃ to obtain a mildew-proof layer 2, taking out the mildew-proof layer, adding a PET (polyethylene terephthalate) film on the surface of the mildew-proof layer by adopting a heat sealing machine, wherein the hot-pressing time is 0.5 s, the heat-sealing pressure is 0.1 MPa, and the heat-sealing temperature is 110 ℃, so that a moisture-proof layer 3 is obtained, the thickness of the mildew-proof layer 2 is 15 mu m, and the thickness of the moisture-proof layer.
The viscosity detection method for the adhesive prepared in the embodiment comprises the steps of pouring the adhesive into a coating cup with a size of-4 cups, detecting the adhesive at room temperature and 25 ℃, enabling the adhesive to flow out through small holes in the bottoms of the cups, recording the time spent after flowing out, wherein the time spent after flowing out is generally 35-65 s, and the viscosity of the adhesive prepared in the embodiment is 60 s, so that the adhesive has better viscosity; the obtained product is subjected to moisture resistance detection by an infrared method, and C390H water vapor transmission is adopted according to GB/T26253-containing 2010 infrared detector method for determining the water vapor transmission rate of plastic films and thin sheetsThe moisture resistance of the sample is tested, the test temperature is 45 ℃, the humidity is 87% RH, the principle is based on the quantitative relation of water molecules absorbed by infrared light, the water vapor transmission rate of the sample is obtained by testing the attenuation condition of infrared light intensity before and after absorbing the water molecules, and the test result is 4.83 g/(m)224h), it was found that the moisture resistance was good.
Example 5
The invention provides a preparation method of a damp-proof and mildew-proof paper tube, which is prepared in the preparation embodiment 2 and comprises the following processing steps:
(1) preparing an adhesive: adding 85 parts of deionized water into a container, heating the container to 85 ℃ and keeping the temperature, adding 5 parts of preservative, 5 parts of thickening agent and 10 parts of emulsifier into the container, and stirring for 2 hours to uniformly mix the materials; then adding 5 parts of dispersing agent, dropwise adding 10 parts of butyl acrylate, continuously stirring the mixture in the dropwise adding process, continuously stirring and reacting for 6 hours after the dropwise adding is finished, adding 15 parts of corn starch after the reaction is finished, stirring and reacting for 2 hours, and naturally cooling to room temperature after the reaction is finished to obtain the adhesive;
(2) polishing the surface of the preliminarily molded paper tube by using a polishing machine, and removing surface impurities to obtain a paper tube base material 1;
(3) the method comprises the steps of coating an adhesive on the surface of a paper tube substrate 1 by adopting a roll coating method, baking for 0.5 h at 100 ℃ to obtain a mildew-proof layer 2, taking out the mildew-proof layer, adding a PET (polyethylene terephthalate) film on the surface of the mildew-proof layer by adopting a heat sealing machine, wherein the hot-pressing time is 0.5 s, the heat-sealing pressure is 0.2 MPa, and the heat-sealing temperature is 135 ℃, so that a moisture-proof layer 3 is obtained, the thickness of the mildew-proof layer 2 is 25 mu m, and the thickness of the moisture-proof layer.
The viscosity of the adhesive prepared in the embodiment is 64 s, and the moisture resistance of the product is 4.21 g/(m) measured by the result2.24h)。
Example 6
The invention provides a preparation method of a damp-proof and mildew-proof paper tube, which is used for preparing the damp-proof and mildew-proof paper tube in embodiment 3 and comprises the following processing steps:
(1) preparing an adhesive: adding 75 parts of deionized water into a container, heating the container to 67 ℃, keeping the temperature, adding 3 parts of preservative, 3 parts of thickening agent and 7 parts of emulsifier into the container, and stirring for 1.7 hours to uniformly mix the materials; then adding 3 parts of dispersing agent, dropwise adding 7 parts of butyl acrylate, continuously stirring the mixture in the dropwise adding process, continuously stirring and reacting for 5 hours after the dropwise adding is finished, adding 13 parts of corn starch after the reaction is finished, stirring and reacting for 1.7 hours, and naturally cooling to room temperature after the reaction is finished to obtain the adhesive;
(2) polishing the surface of the preliminarily molded paper tube by using a polishing machine, and removing surface impurities to obtain a paper tube base material 1;
(3) the method comprises the steps of coating an adhesive on the surface of a paper tube base material 1 by adopting a roll coating method, baking for 0.5 h at 87 ℃ to obtain a mildew-proof layer 2, taking out the mildew-proof layer, adding a PET (polyethylene terephthalate) film on the surface of the mildew-proof layer by adopting a heat sealing machine, wherein the hot-pressing time is 0.5 s, the heat-sealing pressure is 0.15 MPa, and the heat-sealing temperature is 122 ℃ to obtain a damp-proof layer 3, wherein the thickness of the mildew-proof layer 2 is 20 micrometers, and the thickness of the damp-proof layer 3.
The viscosity of the adhesive prepared in the embodiment is 63 s, and the moisture resistance of the product is 4.53 g/(m) according to the measurement result2.24h)。
The foregoing is directed to embodiments of the present invention and, more particularly, to a method and apparatus for controlling a power converter in a power converter, including a power converter, a power converter.
Claims (10)
1. The utility model provides a dampproofing mould proof paper pipe which characterized in that: the mould proof paper pipe substrate surface of protection against mildew is equipped with mould proof layer and dampproof course in proper order, mould proof layer is the coating that the gluing agent is constituteed, the dampproof course is the PET thin layer.
2. The moisture and mildew resistant paper tube of claim 1, wherein: the adhesive comprises the following components in parts by weight: 10-15 parts of corn starch, 5-10 parts of butyl acrylate, 1-5 parts of preservative, 1-5 parts of thickening agent, 5-10 parts of emulsifier, 1-5 parts of dispersing agent and 65-85 parts of deionized water.
3. The moisture and mildew resistant paper tube of claim 2, wherein: the preservative is prepared by dissolving a mixture of ethyl p-hydroxybenzoate and butyl p-hydroxybenzoate in ethanol at a mass ratio of 1:1-2.5, wherein the volume ratio of the mixture of ethyl p-hydroxybenzoate and butyl p-hydroxybenzoate to ethanol is 1: 1-1.5.
4. The moisture and mildew resistant paper tube of claim 2, wherein: the thickening agent is cationic hydroxyethyl cellulose modified bentonite.
5. The moisture and mildew resistant paper tube of claim 4, wherein: the weight ratio of the bentonite to the cationic hydroxyethyl cellulose is 1: 0.3-0.5.
6. The moisture and mildew resistant paper tube of claim 5, wherein: the preparation method of the thickening agent comprises the following steps:
(1) grinding and screening bentonite to obtain bentonite particles with the particle size of 50-100 mu m;
(2) placing the bentonite particles obtained in the step (1) into a sodium chloride salt solution with the mass concentration of 5-15%, stirring for 2-4 h, keeping the temperature of the solution at 65-85 ℃, removing the filtrate after the reaction is finished, washing the filter cake to be neutral by using distilled water, baking for 6-8 h at the temperature of 120-140 ℃, and grinding the obtained product to obtain salt modified bentonite particles with the particle size of 50-100 mu m;
(3) and (3) adding cationic hydroxyethyl cellulose in a weight ratio into the salt modified bentonite particles prepared in the step (2), continuously stirring for 1-2 h at the temperature of 65-75 ℃, naturally cooling after the reaction is finished, and grinding to obtain the cationic hydroxyethyl cellulose modified bentonite with the particle size of 50-100 mu m.
7. The moisture and mildew resistant paper tube of claim 2, wherein: the emulsifier is polyoxyethylene 20 sorbitan monooleate, and the dispersant is talcum powder.
8. A method for preparing a moisture and mildew resistant paper tube, the method comprising the steps of preparing a moisture and mildew resistant paper tube as claimed in any one of claims 1 to 7, wherein: the method comprises the following processing steps:
(1) preparing an adhesive: adding deionized water in a mass ratio into a container, heating the container to 60-85 ℃, keeping the temperature, adding a preservative, a thickening agent and an emulsifier in a mass ratio into the container, and stirring for 1.5-2 h to uniformly mix the materials; then adding a dispersant in a mass ratio, dropwise adding butyl acrylate in a weight ratio, continuously stirring the mixture in the dropwise adding process, continuously stirring and reacting for 4-6 h after the dropwise adding is finished, adding corn starch in a mass ratio after the reaction is finished, stirring and reacting for 1.5-2 h, and naturally cooling to room temperature after the reaction is finished to obtain the adhesive;
(2) polishing the surface of the preliminarily molded paper tube by using a polishing machine, and removing surface impurities to obtain a paper tube base material;
(3) and (2) coating the adhesive prepared in the step (1) on the surface of a paper tube substrate by adopting a roll coating method, baking for 0.5 h at 75-100 ℃ to prepare a mildew-proof layer, taking out the mildew-proof layer, adding a PET (polyethylene terephthalate) film on the surface of the mildew-proof layer by adopting a heat sealing machine, and obtaining the moisture-proof layer, wherein the hot-pressing time is 0.5 s, the heat-sealing pressure is 0.1-0.2 MPa, and the heat-sealing temperature is 110-135 ℃.
9. The method for preparing the moisture-proof and mildew-proof paper tube as claimed in claim 8, wherein the steps of: the thickness of the mildew-proof layer in the step (2) is 15-25 μm.
10. The method for preparing the moisture-proof and mildew-proof paper tube as claimed in claim 8, wherein the steps of: the thickness of the moisture-proof layer in the step (3) is 10-50 μm.
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| CN202011540709.2A CN112677574A (en) | 2020-12-23 | 2020-12-23 | Moisture-proof and mildew-proof paper tube and preparation method thereof |
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Citations (4)
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|---|---|---|---|---|
| CN101049941A (en) * | 2007-03-29 | 2007-10-10 | 浙江三鼎科技有限公司 | Method for preparing inorganic gel of bentonite |
| CN103896294A (en) * | 2014-03-26 | 2014-07-02 | 芜湖恒杰膨润土科技有限公司 | Artificial sodium bentonite |
| CN108424735A (en) * | 2018-03-28 | 2018-08-21 | 宁波依森纸制品有限公司 | A kind of paper furniture adhesive and preparation method thereof |
| CN211171430U (en) * | 2019-12-09 | 2020-08-04 | 河北稳浮克达纸制品有限公司 | Waterproof and moistureproof paper tube |
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2020
- 2020-12-23 CN CN202011540709.2A patent/CN112677574A/en active Pending
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|---|---|---|---|---|
| CN101049941A (en) * | 2007-03-29 | 2007-10-10 | 浙江三鼎科技有限公司 | Method for preparing inorganic gel of bentonite |
| CN103896294A (en) * | 2014-03-26 | 2014-07-02 | 芜湖恒杰膨润土科技有限公司 | Artificial sodium bentonite |
| CN108424735A (en) * | 2018-03-28 | 2018-08-21 | 宁波依森纸制品有限公司 | A kind of paper furniture adhesive and preparation method thereof |
| CN211171430U (en) * | 2019-12-09 | 2020-08-04 | 河北稳浮克达纸制品有限公司 | Waterproof and moistureproof paper tube |
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