CN115726222A - Production process of natural-color environment-friendly straw base paper - Google Patents
Production process of natural-color environment-friendly straw base paper Download PDFInfo
- Publication number
- CN115726222A CN115726222A CN202211487496.0A CN202211487496A CN115726222A CN 115726222 A CN115726222 A CN 115726222A CN 202211487496 A CN202211487496 A CN 202211487496A CN 115726222 A CN115726222 A CN 115726222A
- Authority
- CN
- China
- Prior art keywords
- natural
- base paper
- color
- amount
- pulp
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Paper (AREA)
Abstract
The invention discloses a production process of natural-color environment-friendly straw base paper, belongs to the technical field of environment-friendly straws, and particularly relates to natural-color environment-friendly straw base paper which contains natural-color softwood fibers, natural-color hardwood fibers, a wet strength agent, an internal sizing agent, a filler and at least one of carboxymethyl hemicellulose, micronized cellulose and chitosan; the wet strength agent is PEI wet strength agent, the internal sizing agent is AKD, and the filler is at least one of talcum powder and light calcium carbonate. As the PEI wet strength agent 1 is adopted, byproducts of 3-dichloro-2-propanol (DCP) and 3-chloro-1, 2-propanediol (CPD) can be avoided, and dispersant emulsion can be selectively added in the preparation of the natural color environment-friendly straw base paper, the invention has the following beneficial effects: the natural-color environment-friendly straw base paper has good tensile strength, wet tensile strength, stiffness and ring crush strength.
Description
Technical Field
The invention belongs to the technical field of environment-friendly straws, and particularly relates to a production process of natural-color environment-friendly straw base paper.
Background
The straw is a common auxiliary tool when drinking drinks, wherein the consumption of the plastic straw is always high, and the living environment and the ecological environment are seriously harmed due to improper recycling and difficult recycling of the plastic straw. With the increasing awareness of environmental protection, the national catering industry in particular forbids the use of non-degradable disposable plastic straws. Therefore, the paper suction pipe is produced, and the paper suction pipe is formed by surrounding the suction pipe paper. The mainstream straw paper on the market at present is mainly heavy sizing base paper, and a certain amount of wet strength agent needs to be added in order to improve the liquid resistance of the straw paper in the production process, wherein the adding amount of the wet strength agent is different according to the final use requirement of the straw paper.
The production process of the mainstream wet strength agent in the market at present is an epichlorohydrin polymerization process, the chloropropanol content of the finished wet strength agent is very high, and the chloropropanol is used as a strong carcinogen, and the residual amount of the chloropropanol is more and more emphasized in materials directly contacted with food packaging. In the current production process of the straw paper, the residual chloropropanol is a great food safety risk. The paper straws sold in the market are irregular in quality, low in strength, easy to soften and the like, so that the performance of the paper straws needs to be improved, and the utilization rate of the paper straws needs to be improved.
Disclosure of Invention
The invention aims to provide a production process of natural-color environment-friendly straw base paper with good tensile strength, good wet tensile strength, good stiffness and good ring crush strength.
The technical scheme adopted by the invention for realizing the purpose is as follows:
an unbleached environment-friendly straw base paper comprises: natural color softwood fibers, natural color hardwood fibers, wet strength agents, internal sizing agents and fillers, and at least one of carboxymethyl hemicellulose, microfibrillated cellulose and chitosan; the wet strength agent is PEI wet strength agent, the sizing agent in the pulp is AKD, and the filling material is at least one of talcum powder and light calcium carbonate. The method comprises the steps of using a PAE wet strength agent to generate byproducts of 1, 3-dichloro-2-propanol (DCP) and 3-chloro-1, 2-propanediol (CPD), thereby influencing the use of the obtained product as a straw, using a PEI wet strength agent to solve the problem of the byproducts, compounding natural color softwood fibers and natural color hardwood fibers, adding the wet strength agent, an internal sizing agent and a filler as necessary additives, and then selectively adding at least one of a dispersant emulsion, carboxymethyl hemicellulose, micro cellulose and chitosan to improve the performance of the prepared natural color environment-friendly straw base paper, wherein in the presence of the internal sizing agent and the filler, the sizing carboxymethyl hemicellulose and the PEI are jointly used, so that the excellent effect is achieved, the tensile strength, the wet tensile strength, the stiffness and the ring crush strength of the natural color environment-friendly straw base paper can be improved, the performance improvement effect of the obtained natural color environment-friendly straw is limited, the carboxymethyl hemicellulose and the natural color environment-friendly dispersant emulsion are jointly used for preparing the natural color environment-friendly straw base paper, and the carboxymethyl hemicellulose and the dispersant can be better than the base paper when the carboxymethyl hemicellulose and the dispersant are jointly used for preparing the environment-friendly straw, and the environment-friendly straw are respectively used; when the microfibrillated cellulose or chitosan is further used, the use of the microfibrillated cellulose is found to be superior to the use of chitosan, and because of the use of carboxymethyl hemicellulose and/or a dispersant emulsion, the microfibrillated cellulose and chitosan only need to be small in amount to have a good effect, and the use of chitosan can impart antibacterial performance to the natural-color environment-friendly straw base paper. The natural-color environment-friendly raw paper for the straw also has the advantages of smooth surface, no fading, high stiffness, no softening, bubble resistance, no tube scattering and the like.
Preferably, the virgin softwood fibers and the virgin hardwood fibers are derived from virgin softwood pulp and virgin hardwood pulp, respectively.
Preferably, the mass ratio of the natural color softwood fibers to the natural color hardwood fibers is 1:0-4.
Preferably, the amount of filler is 10-15wt% of the total greige wood fiber.
A preparation method of natural-color environment-friendly straw base paper comprises the following steps: compounding and proportioning natural color softwood pulp and natural color hardwood pulp, and preparing natural color environment-friendly straw base paper through a papermaking process by adding an additive; the natural softwood pulp and the natural hardwood pulp are mixed at a ratio of 1:0-4 by mass; the additive comprises a wet strength agent, an internal sizing agent and a filler, and comprises at least one of a dispersant emulsion, carboxymethyl hemicellulose, micronized cellulose and chitosan.
Preferably, the dispersant emulsion is composed of a dispersant, an emulsifier and water, wherein the dispersant is polyoxyethylene, and the emulsifier is at least one of tween 80 and span 80.
Preferably, the wet strength agent is used in an amount of 0.4-1.6wt% of the total wood pulp amount.
Preferably, the internal sizing agent is used in an amount of 0.05 to 0.2wt% of the total amount of wood pulp.
Preferably, the dispersant emulsion is used in an amount of 0.3 to 1.5wt% based on the total amount of wood pulp.
Preferably, the carboxymethyl hemicellulose is used in an amount of 3-12wt% of the total wood pulp.
Preferably, in the preparation of the dispersant emulsion, the dispersant and the emulsifier are mixed, treated at 80-90 ℃ for 0.5-2h, added with distilled water at 80-90 ℃ and stirred and mixed to obtain the dispersant emulsion.
More preferably, in the preparation of the dispersant emulsion, the dispersant is polyethylene oxide.
More preferably, in the preparation of the dispersant emulsion, the emulsifier is at least one of tween 80 and span 80.
More preferably, the emulsifier is used in an amount of 15-30wt% of the dispersant in the preparation of the dispersant emulsion.
More preferably, the amount of distilled water used in the preparation of the dispersant emulsion is 300 to 400% by weight of the dispersant.
Preferably, in the preparation of carboxymethyl hemicellulose, the hemicellulose is dispersed in a solvent, an alkaline solution is added, the mixture is treated at 20-40 ℃ for 0.5-2h, an etherifying agent is added, the etherification reaction is carried out at 30-70 ℃ for 2-8h, the filtration is carried out after the reaction is finished, an ethanol solution is used for washing a filter cake until no chloride ion exists in the filtrate, and then the filtration, drying and crushing are carried out to obtain the carboxymethyl hemicellulose.
More preferably, in the preparation of carboxymethyl hemicellulose, the solvent is at least one of ethanol, isopropanol and n-propanol.
More preferably, in the preparation of carboxymethyl hemicellulose, hemicellulose is used in an amount of 2-6wt% of the solvent.
More preferably, in the preparation of carboxymethyl hemicellulose, the alkaline solution is sodium hydroxide with the mass fraction of 10-20 wt%.
More preferably, in the preparation of carboxymethyl hemicellulose, the alkaline solution is used in an amount such that the amount of sodium hydroxide in the solution is 100-300wt% of the hemicellulose.
More preferably, in the preparation of carboxymethyl hemicellulose, the etherifying agent is monochloroacetic acid, and the use amount of the etherifying agent is 80-240wt% of the hemicellulose.
Preferably, in the preparation of the raw paper for the straw, the paper pulp is defibered, wherein the defibering revolution is 2000-3000 r, the pressing pressure is 0.4-0.6MPa, the pressing time is 5-20min, the drying time is 5-20min, and the drying temperature is 100-120 ℃.
Preferably, in the preparation of the raw straw paper, the natural softwood pulp and the natural hardwood pulp are mixed in a ratio of 1:0-4 by mass ratio. The total pulp amount refers to the total amount of use of the unbleached softwood pulp and unbleached hardwood pulp in the preparation of the corresponding batches of base paper.
Preferably, in the preparation of the raw paper for the straw, the wet strength agent is PEI wet strength agent, and the use amount of the wet strength agent is 0.4-1.6wt% of the total wood pulp.
Preferably, in the preparation of the base paper for the straw, the internal sizing agent is AKD, and the using amount of the internal sizing agent is 0.05-0.2wt% of the total wood pulp.
Preferably, in the preparation of the base paper for the straw, the filler is talcum powder, and the using amount of the talcum powder is 10-15wt% of the total wood pulp.
Preferably, in the preparation of the base paper for the straw, the filler is light calcium carbonate, and the using amount of the light calcium carbonate is 10-15wt% of the total amount of the wood pulp.
Preferably, in the preparation of the raw paper for the straw, the additive comprises at least one of dispersant emulsion, carboxymethyl hemicellulose, microfibrillated cellulose and chitosan.
Preferably, in the preparation of the base paper for the straw, the dispersant emulsion is used in an amount of 0.3-1.5wt% of the total amount of the wood pulp.
Preferably, in the preparation of the raw paper for the straw, the carboxymethyl hemicellulose is used in an amount of 3-12wt% of the total wood pulp.
Preferably, in the preparation of the base paper for the straw, the usage amount of the microfibrillated cellulose is 1-6wt% of the total wood pulp.
Preferably, in the preparation of the raw paper for the straw, the chitosan is used in an amount of 0.5-4wt% of the total wood pulp.
The invention discloses an application of carboxymethyl hemicellulose and PEI wet strength agent in improving the performance of straw base paper, wherein the performance is at least one of tensile strength, wet tensile strength, stiffness and ring crush strength.
The invention adopts the natural color softwood fiber, the natural color hardwood fiber, the wet strength agent, the internal sizing agent and the filler to prepare the natural color environment-friendly straw base paper, wherein the wet strength agent is the PEI wet strength agent, and at least one of dispersant emulsion, carboxymethyl hemicellulose, microfibrillated cellulose and chitosan can be added in the preparation of the natural color environment-friendly straw base paper, so that the invention has the following beneficial effects: the natural-color environment-friendly straw base paper has good tensile strength, wet tensile strength, stiffness and ring crush strength. Therefore, the production process of the natural-color environment-friendly straw base paper has the advantages of good tensile strength, good wet tensile strength, good stiffness and good ring crush strength.
Drawings
FIG. 1 is an electron microscope image of a natural-color environment-friendly suction tube base paper;
FIG. 2 is a drawing of tensile strength of a raw colored environment-friendly straw base paper;
FIG. 3 is a graph showing the wet tensile strength of a raw colored environmental-friendly straw base paper;
FIG. 4 is a stiffness diagram of a natural-color environment-friendly straw base paper;
FIG. 5 is a ring crush tension diagram of a natural-color environment-friendly straw base paper.
Detailed Description
The technical solution of the present invention is further described in detail below with reference to the following detailed description and the accompanying drawings:
example 1:
a preparation method of natural-color environment-friendly straw base paper comprises the following preparation steps:
preparing raw paper for the straw: defibering the paper pulp, wherein the defibering revolution is 2000 r, the pressing pressure is 0.5MPa, the pressing time is 10min, the drying time is 10min, and the drying temperature is 110 ℃. In the preparation of base paper, the natural color softwood pulp and the natural color hardwood pulp are mixed by 1:3, the wet strength agent is PEI wet strength agent, the usage amount of the wet strength agent is 1.2wt% of the total wood pulp amount, the internal sizing agent is AKD, the usage amount of the internal sizing agent is 0.12wt% of the total wood pulp amount, the filler is talcum powder, and the usage amount of the talcum powder is 12wt% of the total wood pulp amount. The total pulp amount refers to the total amount of use of the natural softwood pulp and the natural hardwood pulp in the preparation of the corresponding batch of base paper.
In the manufacturing process of the straw body paper, a double-disc mill is used for beating, and the straw body paper is manufactured through the procedures of net feeding forming, squeezing, drying, press polishing, curling and the like by a long-net multi-cylinder paper machine.
Example 2:
compared with the embodiment 1, the embodiment of the preparation method of the natural-color environment-friendly straw base paper adds carboxymethyl hemicellulose in the preparation of the straw base paper.
Preparation of carboxymethyl hemicellulose: dispersing hemicellulose in a solvent, adding an alkaline solution, treating at 30 ℃ for 1h, adding an etherifying agent, carrying out etherification reaction at 50 ℃ for 5h, filtering after the reaction is finished, washing a filter cake by using an ethanol solution until no chloride ion exists in the filtrate, drying, and crushing to obtain carboxymethyl hemicellulose. The solvent is ethanol. The using amount of the hemicellulose is 4wt% of the solvent, the alkaline solution is sodium hydroxide with the mass fraction of 15wt%, the using amount of the alkaline solution is 200wt% of the hemicellulose, the etherifying agent is monochloroacetic acid, and the using amount of the etherifying agent is 120wt% of the hemicellulose.
Preparing raw paper for the straw: defibering the paper pulp, wherein the defibering revolution is 2000 r, the squeezing pressure is 0.5MPa, the squeezing time is 10min, the drying time is 10min, and the drying temperature is 110 ℃. In the preparation of base paper, the natural softwood pulp and the natural hardwood pulp are mixed in a proportion of 1:3, the wet strength agent is PEI wet strength agent, the usage amount of the wet strength agent is 1.2wt% of the total wood pulp amount, the internal sizing agent is AKD, the usage amount of the internal sizing agent is 0.12wt% of the total wood pulp amount, the filler is talcum powder, the usage amount of the talcum powder is 12wt% of the total wood pulp amount, and the usage amount of the carboxymethyl hemicellulose is 6wt% of the total wood pulp amount. The total pulp amount refers to the total amount of use of the natural softwood pulp and the natural hardwood pulp in the preparation of the corresponding batch of base paper.
Example 3:
compared with the embodiment 1, the embodiment of the invention adds the dispersant emulsion in the preparation of the straw base paper.
Preparation of dispersant emulsion: mixing the dispersant and the emulsifier, processing at 90 ℃ for 1h, adding distilled water at 90 ℃, and stirring and mixing to obtain the dispersant emulsion. The dispersing agent is polyoxyethylene, the emulsifier is Tween 80, the using amount of the emulsifier is 20wt% of the dispersing agent, and the using amount of the distilled water is 360wt% of the dispersing agent.
Preparing raw paper for the straw: defibering the paper pulp, wherein the defibering revolution is 2000 r, the pressing pressure is 0.5MPa, the pressing time is 10min, the drying time is 10min, and the drying temperature is 110 ℃. In the preparation of base paper, the natural color softwood pulp and the natural color hardwood pulp are mixed by 1:3, the wet strength agent is PEI wet strength agent, the usage amount of the wet strength agent is 1.2wt% of the total wood pulp, the internal sizing agent is AKD, the usage amount of the internal sizing agent is 0.12wt% of the total wood pulp, the filler is talcum powder, the usage amount of the talcum powder is 12wt% of the total wood pulp, and the usage amount of the dispersant emulsion is 1.2wt% of the total wood pulp. The total pulp amount refers to the total amount of use of the unbleached softwood pulp and unbleached hardwood pulp in the preparation of the corresponding batches of base paper.
Example 4:
compared with the embodiment 1, the embodiment of the preparation method of the natural-color environment-friendly straw base paper adds the dispersant emulsion and the carboxymethyl hemicellulose in the preparation of the straw base paper.
Preparation of dispersant emulsion: mixing the dispersant and the emulsifier, processing at 90 ℃ for 1h, adding distilled water at 90 ℃, and stirring and mixing to obtain the dispersant emulsion. The dispersing agent is polyoxyethylene, the emulsifier is Tween 80, the using amount of the emulsifier is 20wt% of the dispersing agent, and the using amount of the distilled water is 360wt% of the dispersing agent.
Preparation of carboxymethyl hemicellulose: dispersing hemicellulose in a solvent, adding an alkaline solution, treating at 30 ℃ for 1h, adding an etherifying agent, carrying out etherification reaction at 50 ℃ for 5h, filtering after the reaction is finished, washing a filter cake by using an ethanol solution until no chloride ion exists in the filtrate, drying, and crushing to obtain carboxymethyl hemicellulose. The solvent is ethanol. The using amount of the hemicellulose is 4wt% of the solvent, the alkaline solution is sodium hydroxide with the mass fraction of 15wt%, the using amount of the alkaline solution is 200wt% of the hemicellulose, the etherifying agent is monochloroacetic acid, and the using amount of the etherifying agent is 120wt% of the hemicellulose.
Preparing raw paper for the straw: defibering the paper pulp, wherein the defibering revolution is 2000 r, the pressing pressure is 0.5MPa, the pressing time is 10min, the drying time is 10min, and the drying temperature is 110 ℃. In the preparation of base paper, the natural softwood pulp and the natural hardwood pulp are mixed in a proportion of 1:3, the wet strength agent is PEI wet strength agent, the usage amount of the wet strength agent is 1.2wt% of the total wood pulp amount, the internal sizing agent is AKD, the usage amount of the internal sizing agent is 0.12wt% of the total wood pulp amount, the filler is talcum powder, the usage amount of the talcum powder is 12wt% of the total wood pulp amount, the usage amount of the dispersing agent emulsion is 1.2wt% of the total wood pulp amount, and the usage amount of the carboxymethyl hemicellulose is 6wt% of the total wood pulp amount. The total pulp amount refers to the total amount of use of the natural softwood pulp and the natural hardwood pulp in the preparation of the corresponding batch of base paper.
Example 5:
compared with the embodiment 1, the embodiment of the invention adds the microfibrillated cellulose in the preparation of the straw base paper.
Preparing raw paper for the straw: defibering the paper pulp, wherein the defibering revolution is 2000 r, the squeezing pressure is 0.5MPa, the squeezing time is 10min, the drying time is 10min, and the drying temperature is 110 ℃. In the preparation of base paper, the natural softwood pulp and the natural hardwood pulp are mixed in a proportion of 1:3, the wet strength agent is PEI wet strength agent, the usage amount of the wet strength agent is 1.2wt% of the total wood pulp, the internal sizing agent is AKD, the usage amount of the internal sizing agent is 0.12wt% of the total wood pulp, the filler is talcum powder, the usage amount of the talcum powder is 12wt% of the total wood pulp, and the usage amount of the microfibrillated cellulose is 3.6wt% of the total wood pulp. The total pulp amount refers to the total amount of use of the unbleached softwood pulp and unbleached hardwood pulp in the preparation of the corresponding batches of base paper.
Example 6:
compared with the example 2, in the embodiment, microfibrillated cellulose is added in the preparation of the raw paper for the straw.
Preparing raw paper for the straw: defibering the paper pulp, wherein the defibering revolution is 2000 r, the squeezing pressure is 0.5MPa, the squeezing time is 10min, the drying time is 10min, and the drying temperature is 110 ℃. In the preparation of base paper, the natural color softwood pulp and the natural color hardwood pulp are mixed by 1:3, the wet strength agent is PEI wet strength agent, the usage amount of the wet strength agent is 1.2wt% of the total wood pulp amount, the internal sizing agent is AKD, the usage amount of the internal sizing agent is 0.12wt% of the total wood pulp amount, the filler is talcum powder, the usage amount of the talcum powder is 12wt% of the total wood pulp amount, the usage amount of carboxymethyl hemicellulose is 6wt% of the total wood pulp amount, and the usage amount of microfibrillated cellulose is 3.6wt% of the total wood pulp amount. The total pulp amount refers to the total amount of use of the natural softwood pulp and the natural hardwood pulp in the preparation of the corresponding batch of base paper.
Example 7:
compared with the embodiment 3, the embodiment adds the microfibrillated cellulose in the preparation of the straw base paper.
Preparing raw paper for the straw: defibering the paper pulp, wherein the defibering revolution is 2000 r, the pressing pressure is 0.5MPa, the pressing time is 10min, the drying time is 10min, and the drying temperature is 110 ℃. In the preparation of base paper, the natural softwood pulp and the natural hardwood pulp are mixed in a proportion of 1:3, the wet strength agent is PEI wet strength agent, the usage amount of the wet strength agent is 1.2wt% of the total wood pulp amount, the internal sizing agent is AKD, the usage amount of the internal sizing agent is 0.12wt% of the total wood pulp amount, the filler is talcum powder, the usage amount of the talcum powder is 12wt% of the total wood pulp amount, the usage amount of the dispersing agent emulsion is 1.2wt% of the total wood pulp amount, and the usage amount of the microfibrillated cellulose is 3.6wt% of the total wood pulp amount. The total pulp amount refers to the total amount of use of the unbleached softwood pulp and unbleached hardwood pulp in the preparation of the corresponding batches of base paper.
Example 8:
compared with the example 4, in the present example, microfibrillated cellulose is added in the preparation of the raw paper for the straw for environmental protection.
Preparing raw paper for the straw: defibering the paper pulp, wherein the defibering revolution is 2000 r, the pressing pressure is 0.5MPa, the pressing time is 10min, the drying time is 10min, and the drying temperature is 110 ℃. In the preparation of base paper, the natural color softwood pulp and the natural color hardwood pulp are mixed by 1:3, the wet strength agent is PEI wet strength agent, the usage amount of the wet strength agent is 1.2wt% of the total wood pulp amount, the internal sizing agent is AKD, the usage amount of the internal sizing agent is 0.12wt% of the total wood pulp amount, the filler is talcum powder, the usage amount of the talcum powder is 12wt% of the total wood pulp amount, the usage amount of the dispersing agent emulsion is 1.2wt% of the total wood pulp amount, the usage amount of the carboxymethyl hemicellulose is 6wt% of the total wood pulp amount, and the usage amount of the microfibrillated cellulose is 3.6wt% of the total wood pulp amount. The total pulp amount refers to the total amount of use of the natural softwood pulp and the natural hardwood pulp in the preparation of the corresponding batch of base paper.
Example 9:
compared with the embodiment 1, the embodiment of the invention adds chitosan into the preparation of the straw base paper.
Preparing raw paper for the straw: defibering the paper pulp, wherein the defibering revolution is 2000 r, the squeezing pressure is 0.5MPa, the squeezing time is 10min, the drying time is 10min, and the drying temperature is 110 ℃. In the preparation of base paper, the natural color softwood pulp and the natural color hardwood pulp are mixed by 1:3, the wet strength agent is PEI wet strength agent, the usage amount of the wet strength agent is 1.2wt% of the total wood pulp amount, the internal sizing agent is AKD, the usage amount of the internal sizing agent is 0.12wt% of the total wood pulp amount, the filler is talcum powder, the usage amount of the talcum powder is 12wt% of the total wood pulp amount, and the usage amount of the chitosan is 2.1wt% of the total wood pulp amount. The total pulp amount refers to the total amount of use of the natural softwood pulp and the natural hardwood pulp in the preparation of the corresponding batch of base paper.
Example 10:
compared with the embodiment 2, the embodiment adds chitosan into the preparation of the straw base paper.
Preparing raw paper for the straw: defibering the paper pulp, wherein the defibering revolution is 2000 r, the pressing pressure is 0.5MPa, the pressing time is 10min, the drying time is 10min, and the drying temperature is 110 ℃. In the preparation of base paper, the natural softwood pulp and the natural hardwood pulp are mixed in a proportion of 1:3, the wet strength agent is PEI wet strength agent, the usage amount of the wet strength agent is 1.2wt% of the total wood pulp amount, the internal sizing agent is AKD, the usage amount of the internal sizing agent is 0.12wt% of the total wood pulp amount, the filler is talcum powder, the usage amount of the talcum powder is 12wt% of the total wood pulp amount, the usage amount of the carboxymethyl hemicellulose is 6wt% of the total wood pulp amount, and the usage amount of the chitosan is 2.1wt% of the total wood pulp amount. The total pulp amount refers to the total amount of use of the natural softwood pulp and the natural hardwood pulp in the preparation of the corresponding batch of base paper.
Example 11:
compared with the embodiment 3, the embodiment adds chitosan into the preparation of the straw base paper.
Preparing raw paper for the straw: defibering the paper pulp, wherein the defibering revolution is 2000 r, the pressing pressure is 0.5MPa, the pressing time is 10min, the drying time is 10min, and the drying temperature is 110 ℃. In the preparation of base paper, the natural softwood pulp and the natural hardwood pulp are mixed in a proportion of 1:3, the wet strength agent is PEI wet strength agent, the usage amount of the wet strength agent is 1.2wt% of the total wood pulp amount, the internal sizing agent is AKD, the usage amount of the internal sizing agent is 0.12wt% of the total wood pulp amount, the filler is talcum powder, the usage amount of the talcum powder is 12wt% of the total wood pulp amount, the usage amount of the dispersing agent emulsion is 1.2wt% of the total wood pulp amount, and the usage amount of the chitosan is 2.1wt% of the total wood pulp amount. The total pulp amount refers to the total amount of use of the unbleached softwood pulp and unbleached hardwood pulp in the preparation of the corresponding batches of base paper.
Example 12:
compared with the embodiment 4, the embodiment adds chitosan into the preparation of the straw base paper.
Preparing raw paper for the straw: defibering the paper pulp, wherein the defibering revolution is 2000 r, the squeezing pressure is 0.5MPa, the squeezing time is 10min, the drying time is 10min, and the drying temperature is 110 ℃. In the preparation of base paper, the natural color softwood pulp and the natural color hardwood pulp are mixed by 1:3, the wet strength agent is PEI wet strength agent, the usage amount of the wet strength agent is 1.2wt% of the total wood pulp amount, the internal sizing agent is AKD, the usage amount of the internal sizing agent is 0.12wt% of the total wood pulp amount, the filler is talcum powder, the usage amount of the talcum powder is 12wt% of the total wood pulp amount, the usage amount of the dispersing agent emulsion is 1.2wt% of the total wood pulp amount, the usage amount of the carboxymethyl hemicellulose is 6wt% of the total wood pulp amount, and the usage amount of the chitosan is 2.1wt% of the total wood pulp amount. The total pulp amount refers to the total amount of use of the natural softwood pulp and the natural hardwood pulp in the preparation of the corresponding batch of base paper.
Example 13:
compared with the embodiment 4, in the embodiment, microfibrillated cellulose and chitosan are added in the preparation of the straw base paper.
Preparing raw paper for the straw: defibering the paper pulp, wherein the defibering revolution is 2000 r, the squeezing pressure is 0.5MPa, the squeezing time is 10min, the drying time is 10min, and the drying temperature is 110 ℃. In the preparation of base paper, the natural color softwood pulp and the natural color hardwood pulp are mixed by 1:3, the wet strength agent is a PEI wet strength agent, the usage amount of the wet strength agent is 1.2wt% of the total wood pulp, the internal sizing agent is AKD, the usage amount of the internal sizing agent is 0.12wt% of the total wood pulp, the filler is talcum powder, the usage amount of the talcum powder is 12wt% of the total wood pulp, the usage amount of the dispersing agent emulsion is 1.2wt% of the total wood pulp, the usage amount of the carboxymethyl hemicellulose is 6wt% of the total wood pulp, the usage amount of the microfibrillated cellulose is 3.6wt% of the total wood pulp, and the usage amount of the chitosan is 2.1wt% of the total wood pulp. The total pulp amount refers to the total amount of use of the unbleached softwood pulp and unbleached hardwood pulp in the preparation of the corresponding batches of base paper.
Example 14:
compared with the embodiment 4, the embodiment adds the microfibrillated cellulose and the chitosan into the preparation of the raw paper for the straw.
Preparing raw paper for the straw: defibering the paper pulp, wherein the defibering revolution is 2000 r, the pressing pressure is 0.5MPa, the pressing time is 10min, the drying time is 10min, and the drying temperature is 110 ℃. In the preparation of base paper, the natural softwood pulp and the natural hardwood pulp are mixed in a proportion of 1:0, namely only using the natural color softwood pulp, using PEI wet strength agent as wet strength agent, using the wet strength agent in an amount of 1.2wt% of the total amount of the softwood pulp, using the in-pulp sizing agent AKD as the in-pulp sizing agent, using the in-pulp sizing agent in an amount of 0.12wt% of the total amount of the softwood pulp, using the filler talc powder, using the talc powder in an amount of 12wt% of the total amount of the softwood pulp, using the dispersant emulsion in an amount of 1.2wt% of the total amount of the softwood pulp, using the carboxymethyl hemicellulose in an amount of 6wt% of the total amount of the softwood pulp, using the microfibril in an amount of 3.6wt% of the total amount of the softwood pulp, and using the chitosan in an amount of 2.1wt% of the total amount of the softwood pulp. The total pulp amount refers to the total amount of use of the natural softwood pulp and the natural hardwood pulp in the preparation of the corresponding batch of base paper.
Comparative example 1:
compared with the embodiment 1, in the preparation of the straw base paper, the wet strength agent is replaced by the PEI wet strength agent into the PAE wet strength agent.
Comparative example 2:
compared with the embodiment 2, in the preparation of the straw base paper, the wet strength agent is replaced by the PEI wet strength agent into the PAE wet strength agent.
Comparative example 3:
compared with the embodiment 3, in the preparation of the straw base paper, the wet strength agent is replaced by the PEI wet strength agent into the PAE wet strength agent.
Comparative example 4:
compared with the embodiment 4, in the preparation of the straw base paper, the wet strength agent is replaced by the PEI wet strength agent into the PAE wet strength agent.
Test examples:
1. surface characterization
Test samples: example 4 the prepared natural-color environmental-friendly base paper for the straw.
The natural-color environment-friendly raw paper for the suction pipe prepared in the embodiment 4 is representative, the surface appearance of the raw paper is represented as shown in fig. 1, the surface of the raw paper for the suction pipe is covered by a layer of film, partial gaps among fibers are filled, and the film and the gap filler on the surface of the raw paper for the suction pipe are used as a protective layer of the fibers, so that the water absorption and swelling of the fibers can be prevented or reduced.
2. Performance testing
Test samples: the natural-color environment-friendly straw base paper is prepared in each example and each comparative example.
The tensile strength is tested by GB/T12914-2018; the wet tensile strength was tested using GB/T465.2-2008; the stiffness is tested by GB/T22364-2018; the ring crush strength is tested by GB/T2679.8-2016. In the figure showing the test results of the above properties, S1 is example 1, S2 is example 2, S3 is example 3, S4 is example 4, S5 is example 5, S6 is example 6, S7 is example 7, S8 is example 8, S9 is example 9, S10 is example 10, S11 is example 11, S12 is example 12, S13 is example 13, S14 is example 14, D1 is comparative example 1, D2 is comparative example 2, D3 is comparative example 3, and D4 is comparative example 4.
The test result of the tensile strength of the natural-color environment-friendly straw base paper prepared by the invention is shown in figure 2, the natural-color softwood pulp and the natural-color hardwood pulp are mixed and pulped according to a certain proportion, then are mixed with the additive, and are subjected to a series of processes to prepare the natural-color environment-friendly straw base paper, when the natural-color environment-friendly straw base paper is prepared according to the methods of the embodiment 1 and the comparative example 1, the PEI wet strength agent is replaced by the PAE wet strength agent, the obtained natural-color environment-friendly straw base paper has basically consistent tensile strength, and the replacement of the simple wet strength agent has no great influence on the tensile strength of the natural-color environment-friendly straw base paper; in examples 2 and 4 and comparative examples 2 and 4, after the PEI wet strength agent is replaced by the PAE wet strength agent, the tensile strength of the obtained natural-color environment-friendly straw base paper is obviously reduced, in example 3 and comparative example 3, after the PEI wet strength agent is replaced by the PAE wet strength agent, the tensile strength of the obtained natural-color environment-friendly straw base paper is only reduced, which indicates that the use of the PEI wet strength agent and carboxymethyl hemicellulose has the effect of enhancing the tensile property of the natural-color environment-friendly straw base paper, the improvement of the tensile property of the natural-color environment-friendly straw base paper by the PEI wet strength agent and the dispersant emulsion is limited, and when the PEI wet strength agent is used together with the carboxymethyl hemicellulose and the dispersant emulsion, the tensile property of the obtained natural-color environment-friendly straw base paper is improved; the effect of the common use of the PEI wet strength agent, the carboxymethyl hemicellulose and the dispersant emulsion is better than that of the common use of the PEI wet strength agent, the carboxymethyl hemicellulose or the dispersant emulsion; the performance of the natural-color environment-friendly straw base paper can be further improved by further adding other reagents into the natural-color environment-friendly straw base paper, for example, the natural-color environment-friendly straw base paper with better tensile property can be obtained after further adding a small amount of microfibrillated cellulose; after a small amount of chitosan is further added, the tensile strength of the obtained natural-color environment-friendly straw base paper is not improved better, but the tensile strength of the natural-color environment-friendly straw base paper is obviously improved after the microfibrillated cellulose and the chitosan are used together.
The test result of the wet tensile strength of the natural-color environment-friendly straw base paper prepared by the invention is shown in figure 3, the natural-color softwood pulp and the natural-color hardwood pulp are mixed and pulped according to a certain proportion, then are mixed with the additive, and are subjected to a series of processes to prepare the natural-color environment-friendly straw base paper, the change trend of the wet tensile strength of the natural-color environment-friendly straw base paper is consistent with the change of the tensile strength, and the fact that the tensile strength and the wet tensile strength of the natural-color environment-friendly straw base paper obtained by the method are influenced by basically the same or basically identical factors is shown.
The stiffness test result of the natural-color environment-friendly straw base paper prepared by the invention is shown in figure 4, the natural-color softwood pulp and the natural-color hardwood pulp are mixed and pulped according to a certain proportion, then are mixed with the additive, and are prepared through a series of processes to obtain the natural-color environment-friendly straw base paper, when the natural-color environment-friendly straw base paper is prepared according to the methods of the embodiment 1 and the comparative example 1, the PEI wet strength agent is replaced by the PAE wet strength agent, the stiffness of the obtained natural-color environment-friendly straw base paper is basically consistent, and the effect of the replacement of the simple wet strength agent on the stiffness of the natural-color environment-friendly straw base paper is shown; in examples 2 and 4 and comparative examples 2 and 4, after the PEI wet strength agent is replaced by the PAE wet strength agent, the stiffness of the obtained natural-color environment-friendly straw base paper is obviously reduced, in example 3 and comparative example 3, after the PEI wet strength agent is replaced by the PAE wet strength agent, the stiffness of the obtained natural-color environment-friendly straw base paper is only reduced, which shows that the use of the PEI wet strength agent and carboxymethyl hemicellulose has the effect of enhancing the stiffness of the natural-color environment-friendly straw base paper, the PEI wet strength agent and dispersant emulsion have limited improvement on the stiffness of the natural-color environment-friendly straw base paper, and when the PEI wet strength agent, the carboxymethyl hemicellulose and the dispersant emulsion are jointly used, the stiffness of the obtained natural-color environment-friendly straw base paper is improved; the effect of the PEI wet strength agent, the carboxymethyl hemicellulose and the dispersant emulsion is better than that of the PEI wet strength agent, the carboxymethyl hemicellulose or the dispersant emulsion; the stiffness of the natural-color environment-friendly straw base paper can be further improved by further adding other reagents into the natural-color environment-friendly straw base paper, for example, the natural-color environment-friendly straw base paper with better stiffness can be obtained after further adding a small amount of microfibrillated cellulose; after a small amount of chitosan is further added, the stiffness of the obtained natural-color environment-friendly straw base paper is not improved better, but the stiffness of the natural-color environment-friendly straw base paper is obviously improved after the microfibrillated cellulose and the chitosan are used together.
The test result of the ring crush strength of the natural-color environment-friendly straw base paper prepared by the invention is shown in fig. 5, the natural-color softwood pulp and the natural-color hardwood pulp are mixed and pulped according to a certain proportion, then are mixed with the additive, and the natural-color environment-friendly straw base paper is prepared through a series of procedures, when the natural-color environment-friendly straw base paper is prepared according to the methods of the embodiment 1 and the comparative example 1, the PEI wet strength agent is replaced by the PAE wet strength agent, the ring crush strength of the obtained natural-color environment-friendly straw base paper is basically consistent, and the replacement of the simple wet strength agent has no great influence on the ring crush strength of the natural-color environment-friendly straw base paper; in examples 2 and 4 and comparative examples 2 and 4, after the PEI wet strength agent is replaced by the PAE wet strength agent, the ring crush strength of the obtained natural-color environment-friendly straw base paper is obviously reduced, in example 3 and comparative example 3, after the PEI wet strength agent is replaced by the PAE wet strength agent, the ring crush strength of the obtained natural-color environment-friendly straw base paper is only reduced, which indicates that the use of the PEI wet strength agent and carboxymethyl hemicellulose has the effect of enhancing the ring crush performance of the natural-color environment-friendly straw base paper, the improvement of the ring crush performance of the natural-color environment-friendly straw base paper by the PEI wet strength agent and the dispersant emulsion is limited, and when the PEI wet strength agent is used together with the carboxymethyl hemicellulose and the dispersant emulsion, the ring crush performance of the obtained natural-color environment-friendly straw base paper is improved; the effect of the PEI wet strength agent, the carboxymethyl hemicellulose and the dispersant emulsion is better than that of the PEI wet strength agent, the carboxymethyl hemicellulose or the dispersant emulsion; the performance of the natural-color environment-friendly raw paper for the straw can be further improved by further adding other reagents into the natural-color environment-friendly raw paper for the straw, for example, the natural-color environment-friendly raw paper for the straw with better ring crush performance can be obtained after further adding a small amount of micro cellulose; after a small amount of chitosan is further added, the ring crush strength of the obtained natural-color environment-friendly straw base paper is not improved better, but the ring crush strength of the natural-color environment-friendly straw base paper is obviously improved after the microfibrillated cellulose and the chitosan are used together.
The above embodiments are merely illustrative, and not restrictive, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the invention. Therefore, all equivalent technical solutions also belong to the scope of the present invention, and the protection scope of the present invention should be defined by the claims.
Claims (10)
1. An unbleached environment-friendly straw base paper comprises: natural color softwood fibers, natural color hardwood fibers, a wet strength agent, an internal sizing agent and a filler, and at least one of carboxymethyl hemicellulose, microfibrillated cellulose and chitosan; the wet strength agent is PEI wet strength agent, the internal sizing agent is AKD, and the filler is at least one of talcum powder and light calcium carbonate.
2. The natural-color environmental-friendly raw paper for the straw as claimed in claim 1, which is characterized in that: the mass ratio of the natural color softwood fibers to the natural color hardwood fibers is 1:0-4.
3. The raw paper for the natural-color environment-friendly straw as claimed in claim 1, which is characterized in that: the amount of the talcum powder is 10-15wt% of the total natural wood fiber.
4. A preparation method of natural-color environment-friendly straw base paper comprises the following steps: compounding and proportioning natural color softwood pulp and natural color hardwood pulp, and preparing natural color environment-friendly straw base paper through a papermaking process by adding an additive; the natural softwood pulp and the natural hardwood pulp are mixed at a ratio of 1:0-4 in mass ratio; the additives include a wet strength agent, an internal sizing agent, and a filler, and include at least one of a dispersant emulsion, carboxymethyl hemicellulose, microfibrillated cellulose, and chitosan.
5. The method for preparing the natural-color environment-friendly suction pipe base paper as claimed in claim 4, which is characterized in that: the dispersing agent emulsion is composed of a dispersing agent, an emulsifying agent and water, wherein the dispersing agent is polyoxyethylene, and the emulsifying agent is at least one of Tween 80 and span 80.
6. The method for preparing the natural-color environment-friendly raw paper for the straw as claimed in claim 4, wherein the method comprises the following steps: the wet strength agent is used in an amount of 0.4-1.6wt% of the total amount of wood pulp.
7. The method for preparing the natural-color environment-friendly suction pipe base paper as claimed in claim 4, which is characterized in that: the using amount of the sizing agent in the pulp is 0.05-0.2wt% of the total amount of the wood pulp.
8. The method for preparing the natural-color environment-friendly suction pipe base paper as claimed in claim 4, which is characterized in that: the usage amount of the dispersant emulsion is 0.3-1.5wt% of the total wood pulp.
9. The method for preparing the natural-color environment-friendly raw paper for the straw as claimed in claim 4, wherein the method comprises the following steps: the using amount of the carboxymethyl hemicellulose is 3-12wt% of the total wood pulp.
10. Use of carboxymethyl hemicellulose and PEI wet strength agents to improve the performance of straw base paper, said performance being at least one of tensile strength, wet tensile strength, stiffness, ring crush strength.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211487496.0A CN115726222A (en) | 2022-11-24 | 2022-11-24 | Production process of natural-color environment-friendly straw base paper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211487496.0A CN115726222A (en) | 2022-11-24 | 2022-11-24 | Production process of natural-color environment-friendly straw base paper |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115726222A true CN115726222A (en) | 2023-03-03 |
Family
ID=85298247
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211487496.0A Pending CN115726222A (en) | 2022-11-24 | 2022-11-24 | Production process of natural-color environment-friendly straw base paper |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115726222A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109629295A (en) * | 2018-12-25 | 2019-04-16 | 浙江恒达新材料股份有限公司 | A kind of high-stiffness suction pipe facial tissue and preparation method thereof |
| CN111533840A (en) * | 2020-06-24 | 2020-08-14 | 浙江恒达新材料股份有限公司 | Environment-friendly water-resistant reinforced latex for paper and preparation method and application thereof |
| CN111676728A (en) * | 2020-06-24 | 2020-09-18 | 浙江恒川新材料有限公司 | Natural-color high-stiffness high-water-resistance raw paper for straw and preparation method thereof |
| CN111672482A (en) * | 2020-06-30 | 2020-09-18 | 重庆工商大学 | Preparation method of carboxymethyl hemicellulose/chitosan cross-linked spherical hydrogel |
| CN112482082A (en) * | 2020-12-10 | 2021-03-12 | 江门市高力依科技实业有限公司 | Wet strength synergist containing phosphorus-doped carboxymethyl hemicellulose and preparation method thereof |
| CN115012248A (en) * | 2022-04-29 | 2022-09-06 | 冠宏化工（扬州）有限公司 | Novel reinforcing agent for papermaking and preparation method and application thereof |
| CN115182195A (en) * | 2022-07-15 | 2022-10-14 | 牡丹江恒丰纸业股份有限公司 | Preparation method of bacteriostatic environment-friendly straw paper |
-
2022
- 2022-11-24 CN CN202211487496.0A patent/CN115726222A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109629295A (en) * | 2018-12-25 | 2019-04-16 | 浙江恒达新材料股份有限公司 | A kind of high-stiffness suction pipe facial tissue and preparation method thereof |
| CN111533840A (en) * | 2020-06-24 | 2020-08-14 | 浙江恒达新材料股份有限公司 | Environment-friendly water-resistant reinforced latex for paper and preparation method and application thereof |
| CN111676728A (en) * | 2020-06-24 | 2020-09-18 | 浙江恒川新材料有限公司 | Natural-color high-stiffness high-water-resistance raw paper for straw and preparation method thereof |
| CN111672482A (en) * | 2020-06-30 | 2020-09-18 | 重庆工商大学 | Preparation method of carboxymethyl hemicellulose/chitosan cross-linked spherical hydrogel |
| CN112482082A (en) * | 2020-12-10 | 2021-03-12 | 江门市高力依科技实业有限公司 | Wet strength synergist containing phosphorus-doped carboxymethyl hemicellulose and preparation method thereof |
| CN115012248A (en) * | 2022-04-29 | 2022-09-06 | 冠宏化工（扬州）有限公司 | Novel reinforcing agent for papermaking and preparation method and application thereof |
| CN115182195A (en) * | 2022-07-15 | 2022-10-14 | 牡丹江恒丰纸业股份有限公司 | Preparation method of bacteriostatic environment-friendly straw paper |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101449942A (en) | Natural color sanitary paper and preparation method thereof | |
| CN107313283A (en) | A kind of preparation method of wettable water paper handkerchief | |
| CN107881842B (en) | Method for preparing high-strength corrugated base paper by using straws and waste paper pulp | |
| CN103015258A (en) | Manufacturing process for macerative masking tape | |
| CN110904735B (en) | Method for making bamboo pulp household paper and household paper | |
| CN111826991A (en) | Production process of high-strength corrugated paper | |
| CN112878089B (en) | Preparation method of high-breaking-resistance kraft paper | |
| CN107401087A (en) | A kind of dab glassine paper of biological treatment and preparation method thereof | |
| CN100424260C (en) | Mechanical cold method for making paper pulp | |
| CN107354816A (en) | A kind of printing wood-free paper | |
| CN112695569A (en) | Ultralow-quantitative household paper and preparation method thereof | |
| EP3802719A1 (en) | Materials containing cellulose nanofibers | |
| CN110924227B (en) | Method for making bamboo pulp household paper and household paper | |
| CN109235125B (en) | Household paper and preparation method thereof | |
| CN104452467A (en) | Thin natural color food wrapping paper and preparation method thereof | |
| CN115726222A (en) | Production process of natural-color environment-friendly straw base paper | |
| CN111893794A (en) | Method for manufacturing natural-color handbag paper | |
| CN114808537B (en) | Preparation method of household paper and household paper | |
| CN114960266A (en) | Craft paper and preparation method thereof | |
| CN110939013B (en) | Method for manufacturing high-bulk gray board paper | |
| CN109610218B (en) | Preparation method and application of oil-proof plant microfibril or oil-proof nanocellulose | |
| CN113047075A (en) | Preparation process of high-quality engineering base paper for wide drawings | |
| CN111926611A (en) | Pulping method of craft paper | |
| CN111188215A (en) | Preparation method of leaf fiber raw stock | |
| CN111691221A (en) | Rice straw papermaking method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |