CN110714363B - Paper straw and preparation method thereof - Google Patents
Paper straw and preparation method thereof Download PDFInfo
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- CN110714363B CN110714363B CN201911046787.4A CN201911046787A CN110714363B CN 110714363 B CN110714363 B CN 110714363B CN 201911046787 A CN201911046787 A CN 201911046787A CN 110714363 B CN110714363 B CN 110714363B
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
- D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
- D21H21/16—Sizing or water-repelling agents
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47G—HOUSEHOLD OR TABLE EQUIPMENT
- A47G21/00—Table-ware
- A47G21/18—Drinking straws or the like
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B29/00—Layered products comprising a layer of paper or cardboard
- B32B29/002—Layered products comprising a layer of paper or cardboard as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B29/005—Layered products comprising a layer of paper or cardboard as the main or only constituent of a layer, which is next to another layer of the same or of a different material next to another layer of paper or cardboard layer
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
- D21H11/12—Pulp from non-woody plants or crops, e.g. cotton, flax, straw, bagasse
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
- D21H11/16—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only modified by a particular after-treatment
- D21H11/18—Highly hydrated, swollen or fibrillatable fibres
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/20—Macromolecular organic compounds
- D21H17/21—Macromolecular organic compounds of natural origin; Derivatives thereof
- D21H17/24—Polysaccharides
- D21H17/28—Starch
- D21H17/29—Starch cationic
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/63—Inorganic compounds
- D21H17/66—Salts, e.g. alums
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H19/00—Coated paper; Coating material
- D21H19/10—Coatings without pigments
- D21H19/14—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12
- D21H19/34—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12 comprising cellulose or derivatives thereof
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
- D21H21/06—Paper forming aids
- D21H21/08—Dispersing agents for fibres
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
- D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
- D21H21/18—Reinforcing agents
- D21H21/20—Wet strength agents
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47G—HOUSEHOLD OR TABLE EQUIPMENT
- A47G2400/00—Details not otherwise provided for in A47G19/00-A47G23/16
- A47G2400/10—Articles made from a particular material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2250/00—Layers arrangement
- B32B2250/02—2 layers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2250/00—Layers arrangement
- B32B2250/26—All layers being made of paper or paperboard
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- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Paper (AREA)
Abstract
The invention discloses a paper straw, which relates to the technical field of papermaking and comprises a paper layer with hydrophobic modified nano bamboo fibers; the paper sheet is rolled into a tube. The invention also discloses a preparation method of the paper straw, which can effectively solve the problem that the existing paper straw is easy to dissolve.
Description
Technical Field
The invention relates to the technical field of papermaking, in particular to a high-water-resistance paper straw and a preparation method thereof.
Background
The straw, also known as drinking straw, is a tubular structure for sucking drinks. The existing suction pipe is generally made of plastic and is a disposable product. The plastic straw has low cost and simple process, so the plastic straw is widely used. However, such plastic straws are increasingly polluting to the environment after being discarded.
In order to solve the problem that the plastic straw is not degradable and pollutes the environment, the paper straw is produced at the same time. Most of the existing paper straws are directly rolled into a tubular structure by paper, because the existing paper straws have low water resistance (water resistance refers to the capability of resisting the structural damage caused by absorbing moisture and preventing the surface of the straw from dissolving when water exists), although the paper straws can be used for common water-based beverages, when the paper straws are used for heavy oily beverages such as milk shakes, the existing paper straws can be quickly softened and dissolved due to soaking in the oily beverages, and the use feeling of users is very bad.
Disclosure of Invention
The invention aims to provide a paper straw to solve the problem that the existing paper straw is easy to dissolve.
The basic scheme provided by the invention is as follows: a paper straw comprises a paper layer with hydrophobic modified nano bamboo fibers; the paper sheet is rolled into a tube.
The scheme has the advantages that:
compare in present straw paper commonly used, the paper layer in this scheme has effectively improved the water resistance on paper layer because the coating has hydrophobic modified nanometer bamboo fibre, and then has improved the water resistance of whole paper straw. The situation that the paper straw is dissolved can be avoided.
Further, a coating layer is arranged on the outer surface of the paper layer.
Through the coating, form the protection of another layer outside the paper layer, reduce the direct and liquid contact of surface on paper layer, slow down the dissolution that probably appears.
Further, the coating layer is an edible wax layer.
The edible wax has higher water resistance, is not easy to dissolve in water, is harmless to human bodies after being eaten, and can improve the water resistance of the whole paper straw on the premise of meeting the eating requirement by taking the edible wax as a coating layer. The edible wax used in the scheme is natural wax, such as sucrose wax or beeswax.
Further, the paper layer includes a first paper layer and a second paper layer in contact with each other; the first paper layer is spirally wound to form a tubular shape, and adjacent edges of the wound first paper layer are mutually abutted; the second paper layer is reversely and spirally wound on the outer side of the first paper layer; coating layers are coated on the inner side of the first paper layer and the outer side of the second paper layer; the first paper layer and the second paper layer are both sprayed with hydrophobic modified nano bamboo cellulose.
With the paper straw having such a structure, the firmness of the paper straw can be increased as much as possible. Through spraying hydrophobic modified nanocellulose on the first paper layer and the second paper layer, the water resistance of the whole paper straw is increased by increasing the water resistance of the first paper layer and the second paper layer.
The invention also provides a preparation method of the paper straw, which comprises the following steps:
pumping the pulped pulp of bamboo pulp to a pulp forming pool; adding the filler suspension, uniformly mixing, and pumping to a slurry mixing pool; adding nano cellulose, cationic starch and alum, uniformly mixing, and pumping to a papermaking pool; after the pulp in the papermaking pond is subjected to concentration regulation and slag removal, a sizing agent is added at a section of good pulp outlet, and a wet strength agent, a retention aid and a stripping agent are continuously added on line at a pressure screen inlet and then flow into a pulp box;
after the pulp is processed on a machine, dehydrating and forming the pulp by a fourdrinier machine, squeezing the pulp, drying the pulp by a front drying part, spraying the pulp by hydrophobic modified nano-cellulose, and drying and calendaring the pulp in a rear drying part to obtain a paper layer;
coating a coating agent on the outer surface of the paper layer to form a coating layer;
and step four, rolling the paper layer into a tubular shape to form the paper straw.
The scheme has the advantages that:
when the paper layer is manufactured, the hydrophobic modified nano-cellulose is sprayed on the surface of the paper layer after drying, so that the water resistance of the manufactured paper layer is improved. The outer surface of the paper layer is coated with a coating agent to form a coating layer, so that the hardness and water resistance of the paper layer are further improved, the paper straw processed and rolled by the paper layer has high water resistance and is difficult to dissolve in water, and the paper straw has long-time water resistance even in drinks with heavy oil such as milkshakes and the like, and can be ensured not to dissolve in the using period.
Further, the paper layer comprises a first paper layer and a second paper layer, and the first paper layer and the second paper layer are respectively prepared when the paper layer is prepared in the second step; and in the fourth step, the first paper layer and the second paper layer are sequentially wound into a double-layer tubular structure which is sleeved together.
When the first paper layer and the second paper layer are manufactured, the hydrophobic modified nano bamboo fibers are added, so that the first paper layer and the second paper layer have high water resistance, and the double-layer sleeve structure of the first paper layer and the second paper layer further increases the firmness and insolubility of the paper suction pipe.
Further, coating agent is coated on the inner side of the first paper layer and the outer side of the second paper layer in the third step to form a coating layer.
Through the coating layer that the coating agent formed, when making firm connection between first ply and the second ply, make whole paper straw firmer, make whole paper straw's water resistance improve more.
Further, the concentration of the hydrophobic modified nano bamboo cellulose added in the second step is 5% -10%.
The added hydrophobic modified nano bamboo cellulose accounts for 5% -10% of the whole sauce, and the hydrophobic modified nano bamboo cellulose in the concentration range can enable the water resistance of the first paper layer and the second paper layer to reach the best.
Further, in the fourth step, the first paper layer is spirally wound into a tubular structure, and then the second paper layer is reversely and spirally wound into a tubular structure on the outer side of the first paper layer.
The tubular structure formed by the two paper layers is firmer, and the rapid softening and dissolution when contacting oily drinks are avoided.
Drawings
FIG. 1 is a schematic structural view of a paper drinking straw in example 1 of the present invention.
FIG. 2 is a graph showing the comparative results of experiment 1 in example 1 of the present invention.
FIG. 3 is a schematic view showing the structure of a paper drinking straw in example 2 of the present invention.
Detailed Description
The following is further detailed by way of specific embodiments:
reference numerals in the drawings of the specification include: the paper comprises a first paper layer 1, a second paper layer 2 and a coating layer 3.
Example 1
The embodiment is basically as shown in the attached figure 1: the paper straw in the embodiment comprises a paper layer and coating layers covering the inner surface and the outer surface of the paper layer; the paper layer is sprayed with the hydrophobic modified nano bamboo cellulose. The paper layer in this embodiment is only the first paper layer 1, and the coating layer 3 is uniformly coated on the inner side and the outer side of the first paper layer 1.
The coating layer is a layer structure with a thickness of 1-5 mm, which is made by coating with a coating agent, and the coating agent adopted in the embodiment is natural edible wax, such as beeswax or sucrose wax.
The preparation method for manufacturing the paper straw with high water resistance comprises the following steps: (1) according to the prior art, bamboo pulp is pulped, filler, nano cellulose, sizing agent, wet strength agent, retention aid and the like are added, and fiber pulp capable of being screened on the net is prepared through deslagging and concentration; (wherein the mixture ratio of the components is that bamboo pulp is 50-80 parts, filler is 30-40 parts, hydrophobic modified nano bamboo cellulose is 5-10 parts, sizing agent is 0.2-0.8 part, wet strength agent is 0.6-3 parts and retention aid is 0.1-0.3 part, the bamboo pulp is obtained by sieving with a 200-mesh sieve, the filler is one or a plurality of calcium carbonate, talcum powder, kaolin and titanium dioxide which are mixed in any ratio, the mass concentration of the suspension is 8-12%, the nano cellulose is one of TEMPO oxidized micro-fibrillated cellulose, acetylated modified micro-fibrillated cellulose, esterified modified micro-fibrillated cellulose and silanized modified micro-fibrillated cellulose, the mass of the suspension is 0.2-0.3% of the mass of the oven dry fiber, the mass of the cationic starch is 0.3-0.5% of the oven dry fiber, the mass of the alum is 0.1-0.2% of the oven dry fiber, the concentration of the sizing agent is 4-6%, the sizing amount is 1-3 g/m2The wet strength agent is epichlorohydrin, the dosage of which is 1-4% of the weight of the sizing agent, and the retention aid is polyacrylamide, the dosage of which is 0.03-0.1% of the weight of the sizing agent). (2) After the fiber pulp is formed and pressed by a fourdrinier paper machine, the fiber pulp is quickly dried by a large-diameter drying cylinder, then is sprayed by hydrophobic modified nano-cellulose with the concentration of 5-10 percent, and finally is dried, calendered and rolled to prepare the high-water-resistance straw paper. Wherein the hydrophobically modified nano-cellulose is acetylated modified microfibrillated cellulose, esterified modified microfibrillated cellulose and silanized modified microfibrillated cellulose according to the weight ratio of 2: 2: 3 in a mass ratio of 3.
The paper for manufacturing the straw made in the embodiment has good water resistance and wet strength, so that the manufactured straw can effectively block liquid permeation and has good ink adaptability.
The specific implementation process is as follows:
firstly, pulping bamboo pulp through a disc mill, pumping the pulp into a pulp forming pool, adding a filler suspension, uniformly mixing, pumping into a pulp mixing pool, adding nano cellulose, cationic starch and alum, uniformly mixing, pumping into a papermaking pool, thickening and deslagging the pulp, adding a sizing agent into a section of good pulp outlet, continuously adding a wet strength agent, a retention aid and a stripping agent into a pressure screen inlet on line, and then flowing into a pulp box;
and secondly, after the pulp is put on a machine, the pulp is dehydrated, formed and squeezed by a fourdrinier machine, quickly dried by a large-diameter drying cylinder, sprayed by hydrophobic modified nano-cellulose, and dried, calendered and rolled in a post-drying part to prepare the high-water-resistance straw paper. The fourdrinier machine was manufactured by gold mechanical works of Qinyang, or by Dandongtitai mechanical Co. The large diameter dryer cylinder was a 4.5 meter diameter dryer from QINGYANG JILONG MECHANICAL GmbH.
And thirdly, cutting and rewinding the straw paper to prepare the paper straw, inspecting, boxing and warehousing.
Experiment 1
This experiment was to test the effect of hydrophobically modified nanocellulose spraying on paper wet strength.
Experimental mode: the base paper is sprayed with the hydrophobic modified nano bamboo fiber with the concentration of 5 percent and 10 percent respectively, and then the wet strength of the sprayed base paper is measured.
And (4) conclusion: as shown in fig. 2, the wet strength of the paper is doubled by spraying the base paper with the hydrophobic modified nano bamboo fibers with the concentration of 5% and the concentration of 10%. It is demonstrated that the higher the concentration of hydrophobically modified nano bamboo fibers in the concentration range, the better the wet strength.
This experiment was conducted to test the effect of spray coating of hydrophobically modified nanocellulose on the water absorption of paper.
Experimental mode: and (3) respectively spraying the base paper with the hydrophobic modified nano bamboo fibers with the concentration of 5% and the concentration of 10%, and soaking in water for 30min to measure the water absorption rate.
TABLE 1
And (4) conclusion: as can be seen from table 1, the water resistance of the water-repellent modified nano bamboo cellulose after spraying is greatly improved, and the paper straw made of the water-repellent modified nano bamboo cellulose with the spraying concentration of 10% has the lowest water absorption rate and the best water resistance effect.
Example 2
Example 2 is substantially as shown in figure 3: the paper straw in the embodiment comprises a paper layer and coating layers covering the inner surface and the outer surface of the paper layer; the paper layer comprises a first paper layer and a second paper layer which are in contact with each other; the first paper layer is spirally wound to form a tube shape, and adjacent edges of the wound first paper layer are mutually abutted; the second paper layer is reversely and spirally wound on the outer side of the first paper layer; coating layers are coated on the inner side of the first paper layer and the outer side of the second paper layer; the first paper layer and the second paper layer are both sprayed with hydrophobic modified nano bamboo cellulose.
The first paper layer and the second paper layer have the same width.
The width of the first paper layer and the second paper layer is 1cm to 3.5 cm. The first paper layer and the second paper layer are degradable paper. The coating layer is made of food-grade wax.
Edible glue is coated between the first paper layer and the second paper layer to increase the viscosity between the first paper layer and the second paper layer, so that the first paper layer and the second paper layer can form a whole.
In the step (2) of example 1, the first paper layer and the second paper layer are respectively manufactured by the same method, and then the first paper layer and the second paper layer are bonded by edible glue or edible wax. And meanwhile, the inner side surface of the first paper layer and the outer side surface of the second paper layer are uniformly coated by a coating agent to form a coating layer with the thickness of 1-5 mm. In this example, beeswax was selected as the coating agent to form a coating layer having a thickness of 1 mm.
The paper for manufacturing the straw made in the embodiment has good water resistance and wet strength, so that the manufactured straw can effectively block liquid permeation and has good ink adaptability.
The specific implementation process is as follows:
firstly, pulping bamboo pulp through a disc mill, pumping the pulp into a pulp forming pool, adding a filler suspension, uniformly mixing, pumping into a pulp mixing pool, adding nano cellulose, cationic starch and alum, uniformly mixing, pumping into a papermaking pool, thickening and deslagging the pulp, adding a sizing agent into a section of good pulp outlet, continuously adding a wet strength agent, a retention aid and a stripping agent into a pressure screen inlet on line, and then flowing into a pulp box;
and secondly, after the pulp is fed into a machine, the pulp is dehydrated and formed by a fourdrinier machine and is squeezed, a large-diameter drying cylinder is adopted for quick drying, the pulp is sprayed by hydrophobic modified nano-cellulose to form a first paper layer and a second paper layer respectively, edible glue or edible wax is added between the first paper layer and the second paper layer to enable the first paper layer and the second paper layer to be pasted together, then beewax is used as a coating agent on the inner side surface of the first paper layer and the outer side surface of the second paper layer, the coating thickness is 1 mm, and the pulp enters a post-drying part for drying, calendaring and reeling to prepare the high-water-resistance straw paper. The fourdrinier machine was manufactured by gold mechanical works of Qinyang, or by Dandongtitai mechanical Co. The large diameter dryer cylinder was a 7.5 meter diameter dryer from jialong machinery limited, yang.
And thirdly, cutting and rewinding the straw paper to prepare the paper straw, inspecting, boxing and warehousing.
Example 3
Different from the embodiment 2, when the straw paper is formed, the first paper layer is spirally wound to form a tubular shape, and the adjacent edges of the wound first paper layer are mutually abutted; then coating edible glue or edible wax on the outer side surface of the first paper layer, and pasting and fixing the tubular structure formed by the first paper layer; then the second paper layer is spirally wound on the outer side of the first paper layer in the reverse direction; the first paper layer and the second paper layer form a unified paper straw by forming a coating layer by edible glue or edible wax which is coated between the first paper layer and the second paper layer. And finally, uniformly coating a coating agent on the inner side surface of the first paper layer and the outer side surface of the second paper layer to form an inner coating layer and an outer coating layer.
The foregoing is merely an example of the present invention, and common general knowledge in the field of known specific structures and characteristics is not described herein in any greater extent than that known in the art at the filing date or prior to the priority date of the application, so that those skilled in the art can now appreciate that all of the above-described techniques in this field and have the ability to apply routine experimentation before this date can be combined with one or more of the present teachings to complete and implement the present invention, and that certain typical known structures or known methods do not pose any impediments to the implementation of the present invention by those skilled in the art. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.
Claims (5)
1. A preparation method of a paper straw is characterized by comprising the following steps: the method comprises the following steps:
pumping the pulped bamboo pulp to a pulping pool; adding the filler suspension, uniformly mixing, and pumping to a slurry mixing pool; adding nano cellulose, cationic starch and alum, uniformly mixing, and pumping to a papermaking pool; after the pulp in the papermaking pond is subjected to concentration and deslagging, adding a sizing agent at a good pulp outlet, continuously adding a wet strength agent, a retention aid and a stripping agent on line at a pressure screen inlet, and then feeding the mixture into a pulp box;
after the pulp is processed on a machine, dehydrating and forming the pulp by a fourdrinier machine, squeezing the pulp, drying the pulp by a front drying part, spraying the pulp by hydrophobic modified nano-cellulose, and drying and calendaring the pulp in a rear drying part to obtain a paper layer;
coating a coating agent on the outer surface of the paper layer to form a coating layer;
step four, rolling the paper layer into a tube shape to form the paper straw;
the paper layer comprises a first paper layer and a second paper layer, and the first paper layer and the second paper layer are respectively prepared when the paper layer is prepared in the second step; sequentially winding the first paper layer and the second paper layer into a double-layer tubular structure which is sleeved together in the fourth step;
in the second step, the concentration of the added hydrophobic modified nano bamboo cellulose is 5-10 percent;
in the fourth step, the first paper layer is spirally wound into a tubular structure, and then the second paper layer is reversely spirally wound into a tubular structure on the outer side of the first paper layer;
the hydrophobically modified nano-cellulose is acetylated modified microfibrillated cellulose, esterified modified microfibrillated cellulose and silanized modified microfibrillated cellulose according to the weight ratio of 2: 2: 3, and mixing the components according to the mass ratio.
2. The method for manufacturing a paper drinking straw according to claim 1, wherein: and coating the inner side of the first paper layer and the outer side of the second paper layer with a coating agent in the third step to form a coating layer.
3. A paper straw, which is characterized in that: the paper is prepared by the preparation method of claim 1, and comprises a paper layer with hydrophobic modified nano bamboo fibers; the paper layer is rolled into a tubular shape;
the paper layer comprises a first paper layer and a second paper layer which are in contact with each other; the first paper layer is spirally wound to form a tubular shape, and adjacent edges of the wound first paper layer are mutually abutted; the second paper layer is reversely and spirally wound on the outer side of the first paper layer; coating layers are coated on the inner side of the first paper layer and the outer side of the second paper layer; the first paper layer and the second paper layer are both sprayed with hydrophobic modified nano bamboo cellulose;
the hydrophobically modified nano-cellulose is acetylated modified microfibrillated cellulose, esterified modified microfibrillated cellulose and silanized modified microfibrillated cellulose according to the weight ratio of 2: 2: 3, and mixing the components according to the mass ratio.
4. The paper drinking straw of claim 3, wherein: and a coating layer is arranged on the outer surface of the paper layer.
5. The paper drinking straw of claim 4, wherein: the coating layer is an edible wax layer.
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| CN201911046787.4A CN110714363B (en) | 2019-10-30 | 2019-10-30 | Paper straw and preparation method thereof |
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| CN201911046787.4A CN110714363B (en) | 2019-10-30 | 2019-10-30 | Paper straw and preparation method thereof |
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| CN110714363B true CN110714363B (en) | 2022-05-31 |
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| CN111519476B (en) * | 2020-05-18 | 2023-03-24 | 杭州西红柿环保科技有限公司 | Full-degradable alcohol-proof paper pulp molded product and preparation method thereof |
| EP4157599A1 (en) | 2020-05-26 | 2023-04-05 | Arboloom IP AG | Tubular implement and method for manufacturing a tubular implement |
| JP7350093B2 (en) * | 2020-12-17 | 2023-09-25 | 龍竹科技集団股▲分▼有限公司 | How to process bamboo straws |
| CN112647348A (en) * | 2020-12-17 | 2021-04-13 | 深圳昌茂粘胶新材料有限公司 | Hydrophobic printable coating liquid |
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