CN112982010B - Production method of heat-sealable straw paper - Google Patents

Production method of heat-sealable straw paper Download PDF

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Publication number
CN112982010B
CN112982010B CN202110332928.XA CN202110332928A CN112982010B CN 112982010 B CN112982010 B CN 112982010B CN 202110332928 A CN202110332928 A CN 202110332928A CN 112982010 B CN112982010 B CN 112982010B
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paper
surface sizing
sizing agent
straw
solid content
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CN112982010A (en
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季剑锋
史海真
刘�文
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Quzhou Branch China National Pulp And Paper Research Institute
China National Pulp and Paper Research Institute
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Quzhou Branch China National Pulp And Paper Research Institute
China National Pulp and Paper Research Institute
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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
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F11/00—Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines
    • 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
    • D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
    • D21H23/02—Processes or apparatus for adding material to the pulp or to the paper characterised by the manner in which substances are added
    • D21H23/22—Addition to the formed paper
    • D21H23/52—Addition to the formed paper by contacting paper with a device carrying the material
    • 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
    • D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
    • D21H23/02—Processes or apparatus for adding material to the pulp or to the paper characterised by the manner in which substances are added
    • D21H23/22—Addition to the formed paper
    • D21H23/52—Addition to the formed paper by contacting paper with a device carrying the material
    • D21H23/56—Rolls
    • 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
    • D21H25/00—After-treatment of paper not provided for in groups D21H17/00 - D21H23/00
    • D21H25/04—Physical treatment, e.g. heating, irradiating
    • D21H25/06—Physical treatment, e.g. heating, irradiating of impregnated or coated paper

Abstract

The invention relates to a production method of heat-sealing straw paper, which comprises the steps of coating a surface sizing agent with heat sealing property on the surface of paper by adopting a film transfer sizing mode to produce the straw paper, wherein polyvinyl alcohol accounts for 10-30% of the solid content of the surface sizing agent in a sizing formula, the dosage of an absolute dry thermoplastic water-based acrylic ester accounts for 20-60% of the solid content of the surface sizing agent, the dosage of an absolute dry ethylene acrylic acid block copolymer accounts for 20-60% of the solid content of the surface sizing agent, the dosage of an absolute dry PE wax accounts for 5-15% of the solid content of the surface sizing agent, and the dosage of carboxymethyl cellulose accounts for 5-15% of the solid content of the surface sizing agent. The quantitative rate of the suction pipe paper product is 200 to 300g/m 2 The water absorption value of cobb60 is 15 +/-2 g/m 2 And the transverse stiffness is more than or equal to 15mN.m. The product has excellent stiffness, can resist high temperature of more than 85 ℃, is suitable for cold and hot drinks, and passes a swelling resistance test.

Description

Production method of heat-sealable straw paper
Technical Field
The project relates to the field of paper straw production, and mainly relates to a production method of heat-sealing straw paper.
Background
In 2020, 16 months and 1 month, the national institute of development and reform Commission and the department of ecological environment have together released the stipulation of the opinion on the further enhancement of plastic pollution control, and the use of non-degradable disposable plastic straws is prohibited in the nationwide catering industry by the end of 2020. The McDonald China announced that the plastic suction pipe is stopped in the thousands of restaurants in Beijing, shanghai, guangzhou and Shenzhen, and the usage amount of the plastic suction pipe is about 400 tons every year. The cibacco serving as the largest global coffee chain enterprise is declared in 2018, the plastic suction pipe is completely stopped being used in the global range in the present year, and the usage amount of the cibacco in the plastic suction pipe in China is about 200 tons every year.
Compared with a plastic straw, the paper straw is made of paper, is an environment-friendly straw, can be degraded and disappear in soil after being used for several months, cannot cause any pollution to the environment, is more beneficial to green sustainable development, and obviously, the paper straw is particularly important to replace the plastic straw.
At present, paper straw products on the market are mainly realized in a mode of multi-layer body paper winding type glue adhesion, the subsequent drying is needed through a drying room, the production process is relatively complex, the requirement on equipment is high, the glue usage amount is high, and the product application performance and the food safety are greatly influenced by the glue.
The production of the paper straw will meet the outbreak period, but at present, the production process of the paper straw is complex, and the investment of equipment and facilities is large. In the production process of the base paper, the invention adopts the film transfer sizing machine to glue the surface of the base paper with the mixed sizing solution of the thermoplastic water-based acrylate emulsion, the water-based ethylene acrylic acid block copolymer, the PE wax emulsion and the carboxymethyl cellulose, the product after sizing has heat sealing property, the product can be made into the paper straw product only by heat sealing, the subsequent steps of sizing, drying and the like in the production process of the base paper straw are saved, the cost is reduced, and the production efficiency is improved.
Disclosure of Invention
The invention mainly provides a production method of heat-sealing straw paper. The invention adopts a mode of internal sizing and is formed in one step.
The method mainly considers the indexes of the base paper product of the straw paper, the subsequent surface sizing selection, the surface sizing mode and the like.
The raw paper of the straw paper needs to have certain water washing resistance, water resistance and product stiffness so as to meet the use requirement. The production method of the base paper of the straw paper comprises the following steps:
respectively disintegrating softwood pulp and hardwood pulp, pulping the softwood pulp to 30 to 40 DEG SR, pulping the hardwood pulp to 25 to 35 DEG SR, using 40 to 50% of the softwood pulp, using 50 to 60% of the hardwood pulp, uniformly mixing the two pulps, sequentially adding 10 to 30kg of AKD neutral sizing agent per ton of oven dry raw material, 15 to 30kg of PAE wet strength agent stock solution per ton of oven dry raw material, 10 to 30kg of anionic carboxymethyl cellulose per ton of oven dry raw material and 10 to 30kg of cationic starch per ton of oven dry raw material into a flow conveying system, and dehydrating, squeezing and drying by using a table board to obtain the base paper of the straw paper. The PAE wet strength agent and the AKD neutral sizing agent are added to mainly improve the water resistance and the water washing resistance of the product, the anionic carboxymethyl cellulose and the cationic starch are added to mainly provide the stiffness of the product, the method of alternately matching and using the anions and the cations is adopted in the adding process, so that more chemicals can be adsorbed to the surface of the fiber, the functions can be better exerted, the performances of various aspects of the product can be improved, and unbleached pulp can be properly added in the production of the product according to the needs to further improve the stiffness of the product.
The selection of surface sizing and the selection of a surface sizing mode are the keys for realizing the heat sealing performance of the product. Thermoplastic polymers such as thermoplastic water-based acrylate emulsion, water-based ethylene acrylic acid block copolymer, PE wax emulsion and the like have heat sealing property and are tried to be used for the production of the product. The surface adhesive formula needs to consider factors such as initial adhesion, heat cooling speed, interface energy and the like. The thermoplastic water-based acrylate emulsion and the water-based ethylene acrylic acid block copolymer have certain difference in performance, the initial adhesion of the water-based ethylene acrylic acid block copolymer is higher, the cooling speed of the thermoplastic water-based acrylate emulsion is higher, and the formula of the product is obtained through a large number of experiments. PVA is added into surface glue, so that the paper stiffness of the straw can be remarkably improved. In order to prevent the surface sizing agent from penetrating into the paper, a chemical with good water retention property, such as carboxymethyl cellulose, is needed, the carboxyl substitution degree of the carboxymethyl cellulose is 0.85 to 1.0, the substitution degree is high, the water retention effect is excellent, the polymerization degree is 500 to 800, and the viscosity of the surface sizing agent is 30 to 50cp (20 ℃).
The thermoplastic water-based acrylate emulsion comprises the following components: imperial company Neocryl BT-62, neocryl A-2092, dow company RHOBARR 320; soxhlet corporation topscreen; wanhua chemical wanthipro 0614; SE 2457, union, and the like.
When the sizing method is selected, the film transfer surface size press has the following advantages compared with other sizing methods: (1) The surface single-side gluing can be realized, and the chemical cost is saved; (2) The rubber roll directly transfers the rubber material to the surface of the paper, the rubber material is less permeated into the paper, the paper is not extruded after being coated with the rubber, the rubber material on the surface of the paper is more, and chemicals can better play a role on the surface of the paper. (3) Application of surface size can be enhancedAnd (4) glue amount. Experiments show that the invention only has a film transfer surface sizing machine and ensures a certain sizing amount (2.5 to 5g/m of a single surface) 2 ) The heat-sealing performance can be obviously improved, and the effect is difficult to ensure by sizing in other modes.
The specific production method comprises the following steps:
carrying out single-side surface sizing on the dried base paper of the straw paper by a film transfer surface sizing machine, wherein the sizing amount is 2.5-5.0 g/m 2 The adopted surface sizing agent is a mixed sizing agent of polyvinyl alcohol, thermoplastic water-based acrylic ester emulsion, water-based ethylene acrylic acid block copolymer, PE wax emulsion and carboxymethyl cellulose, the mass concentration is 5 to 10 percent, the polyvinyl alcohol accounts for 10 to 30 percent of the solid content of the surface sizing agent, the dosage of the oven dry thermoplastic water-based acrylic ester accounts for 20 to 60 percent of the solid content of the surface sizing agent, the dosage of the oven dry ethylene acrylic acid block copolymer accounts for 20 to 60 percent of the solid content of the surface sizing agent, the usage amount of the oven-dried PE wax accounts for 5-15% of the solid content of the surface sizing agent, the usage amount of the carboxymethyl cellulose accounts for 5-15% of the solid content of the surface sizing agent, the viscosity of the surface sizing agent is 30-50cp (20 ℃), the substitution degree of the used carboxymethyl cellulose is 0.85-1.0, the polymerization degree is 500-800, the reverse side of the suction pipe base paper is subjected to surface sizing by using tap water, the paper web is subjected to film transfer surface sizing machine, then is subjected to drying treatment by a hot air channel, and is wound and formed by a drying cylinder and a calender, and the quantitative weight of the suction pipe paper is 200-300g/m 2 The tightness is 0.75 to 0.85g/m 3 The front smoothness is more than or equal to 100s.
The straw paper is manufactured by a net folding machine, a cylinder mould machine or a fourdrinier machine in a single-layer or double-layer or three-layer mode. The drying cylinder is preferably of a large diameter, which further increases the stiffness of the paper.
The invention achieves the following effects:
the straw paper produced by the invention has good stiffness, excellent water resistance and water resistance, and the cobb60 water absorption value is 15 +/-2 g/m 2 The transverse stiffness is more than or equal to 15mN.m, the longitudinal dry tensile strength is more than or equal to 10kN/m, and the longitudinal wet tensile strength is more than or equal to 2.2 kN/m. The production of the paper straw can be realized by a single-seam sealing mode of a heat sealing machine, the heat sealing temperature is 120-170 ℃, the heat sealing pressure is 0.2-0.5 Mpa, and the heat sealing time is 0.3-0.7s. Produced paper suckerThe pipe product has excellent stiffness, can resist high temperature of more than 85 ℃, is suitable for cold and hot drinks, passes a swelling resistance test, namely a test for 2 hours at 40 or 60 ℃, paper does not separate, is raised, bent and broken after the test, and can be normally used, and the food safety of the paper straw meets the requirements of GB 4806 series standards.
Detailed Description
Example 1
(1) Respectively disintegrating softwood pulp and hardwood pulp, pulping the softwood pulp to 35-degree SR, pulping the hardwood pulp to 25-degree SR, uniformly mixing the two pulps, sequentially adding 20kg of AKD neutral sizing agent per ton of absolutely dry raw material, 25kg of PAE wet strength agent stock solution per ton of absolutely dry raw material, 20kg of anionic carboxymethyl cellulose per ton of absolutely dry raw material and 20kg of cationic starch per ton of absolutely dry raw material into a flow conveying system, and dehydrating, squeezing and drying by using a table board to obtain the raw paper of the straw paper;
(2) The dried raw paper of the straw paper is subjected to single-side surface sizing by a film transfer surface sizing machine, wherein the sizing amount is 2.5g/m 2 The adopted surface sizing agent is a mixed sizing agent of polyvinyl alcohol, thermoplastic water-based acrylate emulsion, water-based ethylene acrylic acid block copolymer, PE wax emulsion and carboxymethyl cellulose, the mass concentration is 5 percent, the polyvinyl alcohol accounts for 10 percent of the solid content of the surface sizing agent, the dosage of absolute dry thermoplastic water-based acrylate (Neocryl BT-62 of the Inssman company) accounts for 60 percent of the solid content of the surface sizing agent, the dosage of absolute dry ethylene acrylic acid block copolymer accounts for 20 percent of the solid content of the surface sizing agent, the dosage of absolute dry PE wax accounts for 5 percent of the solid content of the surface sizing agent, the dosage of the carboxymethyl cellulose accounts for 5 percent of the solid content of the surface sizing agent, the viscosity of the surface sizing agent is 30cp (20 ℃), the substitution degree of the used carboxymethyl cellulose is 1.0, the polymerization degree is 800 on the reverse side, the suction pipe paper base paper is subjected to surface sizing by tap water, after the paper passes through a film transfer surface sizing machine, is subjected to hot air channel drying treatment, and then passes through a drying cylinder and a calender to be reeled and formed, and the suction pipe paper has the basis weight of 200g/m 2 Tightness of 0.85g/m 3 Front smoothness 125s.
The produced straw paper Cobb60 water absorption value is 17 g/m 2 The transverse stiffness was 16.5mN.m, the longitudinal dry tensile strength was 10.3kN/m, and the longitudinal wet tensile strength was 2.3 kN/m.
Example 2
(1) Respectively disintegrating softwood pulp and hardwood pulp, pulping the softwood pulp to 40-degree SR, pulping the hardwood pulp to 30-degree SR, uniformly mixing the two pulps, sequentially adding 10kg of AKD neutral sizing agent per ton of absolutely dry raw material, 15kg of PAE wet strength agent stock solution per ton of absolutely dry raw material, 10kg of anionic carboxymethyl cellulose per ton of absolutely dry raw material and 10kg of cationic starch per ton of absolutely dry raw material into a flow conveying system, and dehydrating, squeezing and drying by using a table board to obtain the raw paper of the straw paper;
(2) The dried raw paper of the straw paper is subjected to single-side surface sizing by a film transfer surface sizing machine, wherein the sizing amount is 5g/m 2 The adopted surface sizing agent is a mixed sizing agent of polyvinyl alcohol, thermoplastic water-based acrylate emulsion, water-based ethylene acrylic acid block copolymer, PE wax emulsion and carboxymethyl cellulose, the mass concentration is 10 percent, the polyvinyl alcohol accounts for 30 percent of the solid content of the surface sizing agent, the dosage of absolute dry thermoplastic water-based acrylate (RHOBARR 320 of the Dow company) accounts for 20 percent of the solid content of the surface sizing agent, the dosage of absolute dry ethylene acrylic acid block copolymer accounts for 30 percent of the solid content of the surface sizing agent, the dosage of absolute dry PE wax accounts for 15 percent of the solid content of the surface sizing agent, the dosage of carboxymethyl cellulose accounts for 5 percent of the solid content of the surface sizing agent, the viscosity of the surface sizing agent is 40cp (20 ℃), the substitution degree of the carboxymethyl cellulose is 0.92, the polymerization degree is 660, the base paper of the straw paper is subjected to surface sizing by using tap water, the paper web is subjected to hot air channel drying treatment after passing through a film transfer surface sizing machine, and then is subjected to winding and forming by a drying cylinder and a calender, and the quantitative rate of the straw paper is 300g/m 2 Tightness of 0.75g/m 3 Front smoothness 154s.
The Cobb60 water absorption value of the produced straw paper is 16.2 g/m 2 The transverse stiffness is 17.4mN.m, the longitudinal dry tensile strength is 19.5kN/m, and the longitudinal wet tensile strength is 4.2kN/m.
Example 3
(1) Respectively disintegrating softwood pulp and hardwood pulp, pulping the softwood pulp to 30-degree SR, pulping the hardwood pulp to 35-degree SR, uniformly mixing 45% of the softwood pulp and 55% of the hardwood pulp, sequentially adding 30kg of AKD neutral sizing agent per ton of the absolutely dry raw material, 30kg of PAE wet strength agent stock solution per ton of the absolutely dry raw material, 30kg of anionic carboxymethyl cellulose per ton of the absolutely dry raw material and 30kg of cationic starch per ton of the absolutely dry raw material into a flow conveying system, and dehydrating, squeezing and drying by using a table board to obtain the raw paper of the straw paper;
(2) The dried raw paper of the straw paper is subjected to single-side surface sizing by a film transfer surface sizing machine, and the sizing amount is 3.5g/m 2 The adopted surface sizing agent is a mixed sizing solution of polyvinyl alcohol, thermoplastic water-based acrylate emulsion, water-based ethylene acrylic acid block copolymer, PE wax emulsion and carboxymethyl cellulose, the mass concentration is 8.0 percent, the polyvinyl alcohol accounts for 20 percent of the solid content of the surface sizing agent, the dosage of absolute dry thermoplastic water-based acrylate (SE 2457 of Kerr company) accounts for 30 percent of the solid content of the surface sizing agent, the dosage of absolute dry ethylene acrylic acid block copolymer accounts for 25 percent of the solid content of the surface sizing agent, the dosage of absolute dry PE wax accounts for 10 percent of the solid content of the surface sizing agent, the dosage of the carboxymethyl cellulose accounts for 15 percent of the solid content of the surface sizing agent, the viscosity of the surface sizing agent is 50 ℃ (20 ℃), the substitution degree of the carboxymethyl cellulose is 0.85, the polymerization degree is 500, the straw paper base paper is subjected to surface sizing by using tap water, after the paper web passes through a film transfer surface sizing machine, is subjected to drying treatment through a hot air channel, and is wound and formed by a drying cylinder and a calender, and the quantitative rate of the straw paper is 260g/m 2 Tightness of 0.80g/m 3 Front smoothness 159s.
The produced straw paper has the water absorption value of Cobb60 of 15.4 g/m < 2 >, the transverse stiffness of 16.8mN.m, the longitudinal dry tensile strength of 18.5kN/m and the longitudinal wet tensile strength of 3.3 kN/m.
Example 4
(1) Respectively disintegrating softwood pulp and hardwood pulp, pulping the softwood pulp to 36-degree SR, pulping the hardwood pulp to 28-degree SR, uniformly mixing 47% of the softwood pulp and 53% of the hardwood pulp, sequentially adding 25kg of AKD neutral sizing agent per ton of the absolutely dry raw material, 20kg of PAE wet strength agent stock solution per ton of the absolutely dry raw material, 25kg of anionic carboxymethyl cellulose per ton of the absolutely dry raw material and 25kg of cationic starch per ton of the absolutely dry raw material into a flow conveying system, and dehydrating, squeezing and drying by using a table board to obtain the raw paper of the straw paper;
(2) The dried raw paper of the straw paper is subjected to single-side surface sizing by a film transfer surface sizing machine, and the sizing amount is 4.5g/m 2 The adopted surface sizing agent is polyvinyl alcohol, thermoplastic water-based acrylate emulsion, water-based ethylene acrylic acid block copolymer, mixed sizing solution of PE wax emulsion and carboxymethyl cellulose, the mass concentration is 8.5 percent, the polyvinyl alcohol accounts for 10 percent of the solid content of the surface sizing agent, the dosage of oven-dried thermoplastic water-based acrylate (Soxhlet company topscreen) accounts for 20 percent of the solid content of the surface sizing agent, the dosage of oven-dried ethylene acrylic acid block copolymer accounts for 60 percent of the solid content of the surface sizing agent, the dosage of oven-dried PE wax accounts for 5 percent of the solid content of the surface sizing agent, the dosage of carboxymethyl cellulose accounts for 5 percent of the solid content of the surface sizing agent, the viscosity of the surface sizing agent is 35cp (20 ℃), the substitution degree of the used carboxymethyl cellulose is 0.90, the polymerization degree is 700, the base paper of the straw paper is subjected to surface sizing by using tap water, after the paper passes through a film transfer surface sizing machine, is subjected to hot air channel drying treatment, and then passes through a drying cylinder and a calender to be rolled and formed, and the ration of the straw paper is 240g/m 2 Tightness of 0.80g/m 3 Front smoothness 145s.
The Cobb60 water absorption value of the produced straw paper is 15.0 g/m 2 The transverse stiffness was 16.9mN.m, the longitudinal dry tensile strength was 14.5kN/m, and the longitudinal wet tensile strength was 3.4 kN/m.
The principles and embodiments of the present invention are described herein using specific examples, which are intended to facilitate an understanding of the methods and core concepts of the present invention. It will be apparent to those skilled in the art that various changes and modifications can be made without departing from the principles of the invention, and these changes and modifications also fall within the scope of the invention as defined in the appended claims.

Claims (3)

1. A production method of heat-sealable straw paper is characterized by comprising the following steps:
(1) Respectively disintegrating softwood pulp and hardwood pulp, pulping the softwood pulp to 30-40 DEG SR, pulping the hardwood pulp to 25-35 DEG SR, using 40-50% of the softwood pulp and 50-60% of the hardwood pulp, uniformly mixing the two pulps, sequentially adding 10-30kg of AKD neutral sizing agent solution relative to each ton of oven dry raw material, 15-30kg of PAE wet strength agent stock solution relative to each ton of oven dry raw material, 10-30kg of anionic carboxymethyl cellulose relative to each ton of oven dry raw material and 10-30kg of cationic starch relative to each ton of oven dry raw material into a flow conveying system, and dehydrating, squeezing and drying the mixture by using a table board to obtain base paper of the straw;
(2) Carrying out single-side surface sizing on the dried base paper of the straw paper by a film transfer surface sizing machine, wherein the sizing amount is 2.5-5.0 g/m 2 The adopted surface sizing agent is a mixed sizing agent of polyvinyl alcohol, thermoplastic aqueous acrylate emulsion, aqueous ethylene acrylic acid block copolymer, PE wax emulsion and carboxymethyl cellulose, the mass concentration is 5 to 10 percent, the polyvinyl alcohol accounts for 10 to 30 percent of the solid content of the surface sizing agent, the dosage of oven dry thermoplastic aqueous acrylate accounts for 20 to 60 percent of the solid content of the surface sizing agent, the dosage of oven dry ethylene acrylic acid block copolymer accounts for 20 to 60 percent of the solid content of the surface sizing agent, the dosage of oven dry PE wax accounts for 5 to 15 percent of the solid content of the surface sizing agent, the dosage of carboxymethyl cellulose accounts for 5 to 15 percent of the solid content of the surface sizing agent, the viscosity of the surface sizing agent is 30 to 50cp (20 ℃), the substitution degree of the carboxymethyl cellulose is 0.85 to 1.0, the polymerization degree is 500 to 800, base paper of the straw paper is subjected to surface sizing by tap water, the paper web is subjected to surface sizing by a film transfer surface sizing machine, then subjected to hot air channel drying treatment, then passed through a drying cylinder and a calender to be reeled and formed into a straw, and the paper is subjected to reverse side, the reverse side of the straw, the paper with the basis weight of the paper being 200 to 300g/m 2 The tightness is 0.75 to 0.85g/m 3 The front smoothness is more than or equal to 100s.
2. A method of producing a heat sealable drinking straw paper as claimed in claim 1, wherein: the straw paper is manufactured by a net folding machine, a cylinder mould machine or a fourdrinier machine in a single-layer or double-layer or three-layer manufacturing mode.
3. A method of producing a heat sealable drinking straw paper as claimed in claim 1, wherein: the heat-sealing paper for the heat-sealing straw can be subsequently sealed by a heat sealing machine to realize the production of the paper straw, wherein the heat-sealing temperature is 120-170 ℃, the heat-sealing pressure is 0.2-0.5 Mpa, and the heat-sealing time is 0.3-0.7 s.
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CN114922004B (en) * 2022-05-24 2023-05-26 天津科技大学 Environment-friendly material for heat-seal bags and preparation method thereof
CN116200967B (en) * 2023-01-12 2024-02-20 厦门鼎闻新材料有限公司 Preparation method of heat-sealable special paper for packaging
CN116289334B (en) * 2023-03-20 2023-10-27 南京高益新材料科技有限公司 Single-layer plastic-free straw paper base paper and preparation method thereof

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WO2018200783A1 (en) * 2017-04-28 2018-11-01 Sun Chemical Corporation Heat sealable barrier coating
US10562659B2 (en) * 2017-09-08 2020-02-18 Georgia-Pacific Bleached Board LLC Heat sealable barrier coatings for paperboard
CN111472198B (en) * 2019-01-23 2022-06-07 金华盛纸业（苏州工业园区）有限公司 Method for manufacturing straw base paper, straw base paper and paper straw
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