CN113106785B - Heat-sealing self-adhesive dialyzing paper and preparation method thereof - Google Patents
Heat-sealing self-adhesive dialyzing paper and preparation method thereof Download PDFInfo
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- CN113106785B CN113106785B CN202110281156.1A CN202110281156A CN113106785B CN 113106785 B CN113106785 B CN 113106785B CN 202110281156 A CN202110281156 A CN 202110281156A CN 113106785 B CN113106785 B CN 113106785B
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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
- D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
- D21H27/18—Paper- or board-based structures for surface covering
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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
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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
- D21H21/18—Reinforcing agents
- D21H21/20—Wet strength agents
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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
- 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
- D21H23/32—Addition to the formed paper by contacting paper with an excess of material, e.g. from a reservoir or in a manner necessitating removal of applied excess material from the paper
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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
- D21H25/00—After-treatment of paper not provided for in groups D21H17/00 - D21H23/00
- D21H25/005—Mechanical treatment
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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
- D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
- D21H27/10—Packing paper
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Abstract
The invention discloses heat-seal self-adhesive dialyzing paper and a preparation method thereof, belonging to the technical field of medical dialyzing paper, and comprising the following steps: dipping the paper base layer in a dipping solution to obtain a dipped paper base layer; and (3) gluing and calendaring the gum dipping paper base layer in the glue spreading liquid to obtain the heat-sealing self-adhesive dialyzing paper. The heat-seal self-adhesive dialyzing paper obtained by the invention has good heat-seal strength, and the heat-seal strength is more than 5.5N/15 mm; the tensile property is good, and the tensile index is more than 97 N.m/g; good tearing performance, the tearing index is 10.7 mN.m2More than g; the stripping effect is good, and no fluffing occurs when the 15mm transparent adhesive tape is pasted and stripped; the storage stability is good, and the storage time reaches more than 3 months; the bacteria-resistant performance is good, and the number of bacteria penetrating through the paper base layer is less than 630.
Description
Technical Field
The invention belongs to the technical field of medical dialyzing paper, and particularly relates to heat-sealing self-adhesive dialyzing paper and a preparation method thereof.
Background
With the increasing importance of people on the medical service industry, the development prospect of the medical instrument sterilization package is encouraging, and the selection of the packaging material also becomes the importance of people. The dialyzing paper is used as an important material for sterilizing and packaging medical instruments, and is generally coated, printed (printed with ink) and made into a paper-plastic bag in the application process, and the dialyzing paper is convenient to use, can be stored for a long time, can be changed according to the size of a specific instrument, has good practicability and is popular with industries and manufacturers.
Compared with porous materials such as non-woven fabrics and the like, the medical dialyzing paper has the characteristics of low price, convenient use and the like, can be subjected to heat sealing or glue sealing with film materials such as PE, PP and the like, and is often used as a sterilization packaging material for medical instruments in the medical packaging industry. At present, the sterilization mode of the sterilization packaging material in China is mainly an ETO ethylene oxide sterilization method and a high-temperature damp-heat steam method, so that the medical dialysis paper needs to have certain air permeability and smaller aperture, the prepared sterilization packaging can prevent bacteria and dust from entering, ethylene oxide gas or steam is allowed to permeate, and the purpose of sterilizing the medical instruments and articles of the packaging materials is achieved. In practical industrial application, the dialyzing paper is generally used for sterilization packaging or blister packaging of some high-end medical instruments, is used as a hard blister sealing cover material, is sealed by materials such as PETG, PVC, PS, PP, PET blister boxes and the like, and has a good sealing effect.
Disclosure of Invention
The invention aims to provide the dialyzing paper which has good heat-seal strength, good tensile property, good tearing property, good peeling effect, good storage stability and good bacteria resistance.
The technical scheme adopted by the invention for realizing the purpose is as follows:
a dialysis paper comprising:
a paper base layer, and a functional layer attached to the paper base layer; the functional layer comprises a glue dipping layer and a glue coating;
the heat seal strength of the dialyzing paper is 5.5N/15 mm or more. The functional layer on the paper base layer can improve the internal bonding strength and the surface performance of the medical dialyzing paper and improve the applicability of the dialyzing paper.
More preferably, the glue is coated on the glue-impregnated layer.
More preferably, the glue dip and glue coat interpenetrate.
Preferably, the functional layer contains at least one of polyvinyl alcohol and starch.
Preferably, the functional layer contains at least one of polyethylene glycol succinate and diethyl sulfosuccinate.
Preferably, the functional layer contains at least one of ethylene-vinyl acetate copolymer, hydroxyacrylic acid and polyacrylamide.
Preferably, the functional layer contains at least one of polyoxyethylene lauryl ether, calcium lactobionate and disodium adenylate.
Preferably, the paper substrate contains at least one of a dry strength agent and a wet strength agent.
More preferably, the dry strength agent is an amphoteric polyacrylamide. Polar groups on the dry strength agent can form hydrogen bonds with hydroxyl groups on the fibers and perform electrostatic adsorption with the fibers, so that the combination among the fibers is increased, and the strength of the dialyzing paper is improved.
More preferably, the wet strength agent is PAE. PAE can carry out the cross-linking with the fibre, has increased the combination between the fibre, makes the fibre take place the gathering of certain degree to promote the air permeability of dialyzing paper.
The invention discloses application of the dialysis paper in medical packaging and/or medical instrument packaging and/or fine chemical packaging.
The invention aims to provide a preparation method of heat-seal self-adhesive dialyzing paper with good heat-seal strength, good tensile property, good tearing property, good peeling effect, good storage stability and good bacteria resistance.
The technical scheme adopted by the invention for realizing the purpose is as follows:
a preparation method of heat-seal self-adhesive dialyzing paper comprises the following steps:
dipping the paper base layer in a dipping solution to obtain a dipped paper base layer;
and (3) gluing and calendaring the gum dipping paper base layer in the glue spreading liquid to obtain the heat-sealing self-adhesive dialyzing paper.
Preferably, the preparation of the heat-seal self-adhesive dialyzing paper further comprises a pulping process and a paper substrate preparation process.
Preferably, the raw material in the pulping process is hardwood pulp and/or softwood pulp sheets.
Preferably, the dipping solution contains starch, polyvinyl alcohol and additives.
Preferably, the coating liquid contains ethylene-vinyl acetate copolymer, hydroxy acrylic acid, polyacrylamide and a functional agent.
Preferably, in the pulping treatment, the hardwood pulp is soaked for 2-6h to obtain hardwood pulp, the hardwood pulp is defibered for 10-60min, and the hardwood pulp is obtained by pulping to 20-40 DEG SR; soaking the softwood pulp plate for 2-6h to obtain softwood pulp, defibering the softwood pulp for 10-60min, and pulping to 20-40 DEG SR to obtain the softwood pulp.
More preferably, the hardwood pulp has a hardwood pulp board content of 6-12wt% and the softwood pulp has a softwood pulp board content of 6-12 wt%.
Preferably, in the preparation of the paper base layer, hardwood pulp and softwood pulp obtained after pulping are mixed, defibering is carried out for 10-60min to obtain a wood pulp mixed solution, a wet strength agent and a dry strength agent are added, stirring is carried out for 5-30min, then mixed wood pulp is obtained after uniform mixing, then sheet making and forming are carried out to form wet paper sheets, and the paper base layer is obtained through squeezing and drying.
More preferably, hardwood pulp and softwood pulp are mixed in a mass ratio of 1: mixing at a ratio of 0.3-3.
More preferably, the wet strength agent is PAE and the amount of wet strength agent added is 0.1-2wt% of the wood pulp mixture.
More preferably, the dry strength agent is amphoteric polyacrylamide, and the addition amount of the dry strength agent is 0.01-0.1wt% of the wood pulp mixed solution.
Preferably, in the preparation of the dipping solution, the polyvinyl alcohol and the starch are added into the solvent and mixed at the temperature of 80-90 ℃, and then the additive is added and mixed uniformly to obtain the dipping solution.
More preferably, the solvent is distilled water.
More preferably, the polyvinyl alcohol is added in an amount of 0.5 to 2wt% based on the solvent.
More preferably, the starch is added in an amount of 0.1-1wt% of the solvent.
More preferably, the additives are polysorbate-80 and polyethylene glycol succinate, the addition amount of the polysorbate-80 is 0.5-2wt% of the solvent, and the addition amount of the polyethylene glycol succinate is 0.02-0.4wt% of the solvent. Use of poly ethylene glycol succinate, mutually attract with PAE and fibre in the paper substrate layer, form stronger combined action, improve the heat-seal intensity of heat-seal self-adhesion type dialyzing paper, improve the tensile property of heat-seal self-adhesion type dialyzing paper, improve the tear property of heat-seal self-adhesion type dialyzing paper, when gluing soak the back rubber coating, combine with the coating interpenetration of gluing, improve the effect of peeling off of heat-seal self-adhesion type dialyzing paper, and improve the storage stability of heat-seal self-adhesion type dialyzing paper, improve the fungus performance that hinders of heat-seal self-adhesion type dialyzing paper.
More preferably, the additive contains polyethylene glycol succinate and diethyl sulfosuccinate, and the mass ratio of the polyethylene glycol succinate to the diethyl sulfosuccinate is 1: mixing at a ratio of 0.1-0.6. The polyethylene glycol succinate and the diethyl sulfosuccinate are in the gum dipping solution, and the affinity effect of the diethyl sulfosuccinate on the groups in the polyethylene glycol succinate enhances the effect of the polyethylene glycol succinate in the gum dipping layer, and improves the performance of the heat-seal self-adhesive dialyzing paper.
Preferably, in the dipping treatment, the paper base layer is dipped in the dipping solution for 5-30min, and then taken out and dried to obtain the dipped paper base layer.
Preferably, in the preparation of the glue coating liquid, the ethylene-vinyl acetate copolymer, the hydroxyacrylic acid, the polyacrylamide and the functional agent are added into the liquid reagent and uniformly mixed to obtain the glue coating liquid.
More preferably, the liquid reagent is distilled water and ethanol in a mass ratio of 1: mixing at a ratio of 0.1-5.
More preferably, the amount of ethylene-vinyl acetate copolymer added is 20-40wt% of the liquid agent.
More preferably, the amount of hydroxyacrylic acid added is 0.5 to 5wt% of the liquid reagent.
More preferably, the polyacrylamide is added in an amount of 1-4wt% of the liquid reagent.
More preferably, the functional agent is polyoxyethylene lauryl ether, and the addition amount of the polyoxyethylene lauryl ether is 0.1-1wt% of the liquid reagent.
More preferably, the functional agent contains laurinol polyoxyethylene ether, calcium lactobionate and disodium adenylate, the amount of the calcium lactobionate in the functional agent is 10-30wt% of the laurinol polyoxyethylene ether, and the amount of the disodium adenylate in the functional agent is 5-20wt% of the laurinol polyoxyethylene ether. After the lauryl alcohol polyoxyethylene ether, the calcium lactobionate and the adenosine disodium salt are coated on the glue dipping layer in the glue coating liquid, the lauryl alcohol polyoxyethylene ether, the calcium lactobionate and the adenosine disodium salt are crosslinked with the components of the glue dipping layer in the drying process and mutually permeate to form tighter combination, so that the obtained heat-seal self-adhesion type dialyzing paper has the advantages of improved heat-seal strength, improved tensile property, improved tearing property, good stripping effect, good storage stability and good bacteria resistance.
Preferably, in the gluing treatment, the gluing liquid is coated on the base layer of the gummed paper, and the heat-seal self-adhesive dialyzing paper is obtained by drying and calendaring, wherein the coating amount is 1.2-4.8 wt%.
The invention discloses heat-seal self-adhesive dialyzing paper prepared by the method.
The heat-seal self-adhesive dialyzing paper is prepared by the gum dipping solution containing polyethylene glycol succinate and diethyl sulfosuccinate and the gum dipping solution containing polyoxyethylene lauryl ether, calcium lactobionate and disodium adenylate, so that the heat-seal self-adhesive dialyzing paper has the following beneficial effects: the heat sealing strength is good, and is more than 5.5N/15 mm; the tensile property is good, and the tensile index is more than 97 N.m/g; good tearing performance, the tearing index is 10.7 mN.m2More than g; the stripping effect is good, and no fluffing occurs when the 15mm transparent adhesive tape is pasted and stripped; the storage stability is good, and the storage time reaches more than 3 months; the bacteria-resistant performance is good, and the number of bacteria penetrating through the paper base layer is less than 630. Therefore, the preparation method of the heat-seal self-adhesive dialyzing paper has the advantages of good heat-seal strength, good tensile property, good tearing property, good peeling effect, good storage stability and good bacteria resistance.
Drawings
FIG. 1 is a graph showing the heat-seal strength of a heat-seal self-adhesive type dialyzing paper;
FIG. 2 is a graph showing the tensile index of heat-seal self-adhesive type dialyzing paper;
FIG. 3 is a graph showing tear indices of heat-seal self-adhesive dialyzing paper;
FIG. 4 is a graph showing the results of the heat-seal self-adhesive type dialyzing paper bacteria-blocking test.
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 heat-sealing self-adhesive dialyzing paper,
pulping treatment: soaking the hardwood pulp board for 4h to obtain hardwood pulp, defibering the hardwood pulp for 30min, and pulping to 23-degree SR to obtain hardwood pulp; soaking the softwood pulp board for 4h to obtain softwood pulp, defibering the softwood pulp for 30min, and pulping to 26-degree SR to obtain the softwood pulp; the hardwood pulp contained 10wt% hardwood pulp board and the softwood pulp contained 10wt% softwood pulp board.
Softwood pulp boards and hardwood pulp boards are available from special paper industries, ltd, huabang, zhejiang.
Preparing a paper base layer: mixing the hardwood pulp and softwood pulp obtained after pulping treatment, defibering for 30min to obtain a wood pulp mixed solution, adding a wet strength agent and a dry strength agent, stirring for 5min, uniformly mixing to obtain mixed wood pulp, then sheet-making and forming to form wet paper sheets, and squeezing and drying to obtain the paper base layer. Hardwood pulp and softwood pulp are mixed according to the mass ratio of 1: mixed at a ratio of 0.64. The wet strength agent is PAE, and the adding amount of the wet strength agent is 0.16wt% of the wood pulp mixed solution; the dry strength agent is amphoteric polyacrylamide, and the addition amount of the dry strength agent is 0.05wt% of the wood pulp mixed solution.
Quantitative determination in sheet making and forming of 60g/m2Pressing the wet paper sheet under 400kPa for 3min, and vacuumizing and drying at 93 ℃ for 5 min.
Gum dipping solution: adding polyvinyl alcohol and starch into a solvent, mixing at the temperature of 80 ℃, adding an additive, and uniformly mixing to obtain a gum dipping solution; the solvent is distilled water, the addition amount of polyvinyl alcohol is 1.2wt% of the solvent, the addition amount of starch is 0.6wt% of the solvent, the additives are polysorbate-80 and polyethylene glycol succinate, the addition amount of polysorbate-80 is 1.2wt% of the solvent, and the addition amount of polyethylene glycol succinate is 0.24wt% of the solvent.
Gum dipping treatment: and (3) dipping the paper base layer in the dipping solution for 10min, taking out and drying to obtain the dipped paper base layer.
Glue coating: adding ethylene-vinyl acetate copolymer, hydroxy acrylic acid, polyacrylamide and a functional agent into a liquid reagent, and uniformly mixing to obtain a glue coating solution; the liquid reagent is distilled water and ethanol in a mass ratio of 1: 0.5, the addition amount of the ethylene-vinyl acetate copolymer is 30wt% of the liquid reagent, the addition amount of the hydroxy acrylic acid is 3.5wt% of the liquid reagent, the addition amount of the polyacrylamide is 2.5wt% of the liquid reagent, the functional agent is polyoxyethylene lauryl ether, and the addition amount of the polyoxyethylene lauryl ether is 0.6wt% of the liquid reagent.
Gluing treatment: and coating the gumming liquid on a gumming paper base layer, drying and calendaring to obtain the heat-seal self-adhesive dialyzing paper, wherein the coating weight is 3 wt%.
Example 2:
a preparation method of heat-sealing self-adhesive dialyzing paper,
pulping treatment: soaking the hardwood pulp board for 4h to obtain hardwood pulp, defibering the hardwood pulp for 30min, and pulping to 23-degree SR to obtain hardwood pulp; soaking the softwood pulp board for 4h to obtain softwood pulp, defibering the softwood pulp for 30min, and pulping to 26-degree SR to obtain the softwood pulp; the hardwood pulp contained 10wt% hardwood pulp board and the softwood pulp contained 10wt% softwood pulp board.
Softwood pulp boards and hardwood pulp boards are available from special paper industries, ltd, huabang, zhejiang.
Preparing a paper base layer: mixing the hardwood pulp and softwood pulp obtained after pulping treatment, defibering for 30min to obtain a wood pulp mixed solution, adding a wet strength agent and a dry strength agent, stirring for 5min, uniformly mixing to obtain mixed wood pulp, then sheet-making and forming to form wet paper sheets, and squeezing and drying to obtain the paper base layer. Hardwood pulp and softwood pulp are mixed according to the mass ratio of 1: mixed at a ratio of 0.64. The wet strength agent is PAE, and the addition amount of the wet strength agent is 0.16wt% of the wood pulp mixed solution; the dry strength agent is amphoteric polyacrylamide, and the addition amount of the dry strength agent is 0.05wt% of the wood pulp mixed solution.
Quantitative determination of 60g/m in sheet-making and forming2Pressing the wet paper sheet under 400kPa for 3min, and vacuumizing and drying at 93 ℃ for 5 min.
Gum dipping solution: adding polyvinyl alcohol and starch into a solvent, mixing at the temperature of 80 ℃, adding an additive, and uniformly mixing to obtain a gum dipping solution; the solvent is distilled water, the addition amount of polyvinyl alcohol is 1.2wt% of the solvent, the addition amount of starch is 0.6wt% of the solvent, the additives are polysorbate-80, polyethylene glycol succinate and diethyl acetyl succinate, the addition amount of polysorbate-80 is 1.2wt% of the solvent, the addition amount of polyethylene glycol succinate is 0.24wt% of the solvent, and the polyethylene glycol succinate and the diethyl acetyl succinate in the additives are mixed according to a mass ratio of 1: mixing at a ratio of 0.2.
Gum dipping treatment: and (3) dipping the paper base layer in the dipping solution for 10min, taking out and drying to obtain the dipped paper base layer.
Glue coating: adding ethylene-vinyl acetate copolymer, hydroxy acrylic acid, polyacrylamide and a functional agent into a liquid reagent, and uniformly mixing to obtain a glue coating solution; the liquid reagent is distilled water and ethanol in a mass ratio of 1: 0.5, the addition amount of the ethylene-vinyl acetate copolymer is 30wt% of the liquid reagent, the addition amount of the hydroxy acrylic acid is 3.5wt% of the liquid reagent, the addition amount of the polyacrylamide is 2.5wt% of the liquid reagent, the functional agent is polyoxyethylene lauryl ether, and the addition amount of the polyoxyethylene lauryl ether is 0.6wt% of the liquid reagent.
Gluing treatment: and coating the gumming liquid on a gummed paper base layer, drying and calendaring to obtain the heat-seal self-adhesive dialyzing paper, wherein the coating amount is 3 wt%.
Example 3:
a preparation method of heat-sealing self-adhesive dialyzing paper,
pulping treatment: soaking the hardwood pulp board for 4h to obtain hardwood pulp, defibering the hardwood pulp for 30min, and pulping to 23-degree SR to obtain hardwood pulp; soaking the softwood pulp board for 4h to obtain softwood pulp, defibering the softwood pulp for 30min, and pulping to 26-degree SR to obtain the softwood pulp; the hardwood pulp contained 10wt% hardwood pulp board and the softwood pulp contained 10wt% softwood pulp board.
Softwood pulp boards and hardwood pulp boards are available from special paper industries, ltd, huabang, zhejiang.
Preparing a paper base layer: mixing the hardwood pulp and softwood pulp obtained after pulping treatment, defibering for 30min to obtain a wood pulp mixed solution, adding a wet strength agent and a dry strength agent, stirring for 5min, uniformly mixing to obtain mixed wood pulp, then sheet-making and forming to form wet paper sheets, and squeezing and drying to obtain the paper base layer. Hardwood pulp and softwood pulp are mixed according to the mass ratio of 1: mixed at a ratio of 0.64. The wet strength agent is PAE, and the addition amount of the wet strength agent is 0.16wt% of the wood pulp mixed solution; the dry strength agent is amphoteric polyacrylamide, and the addition amount of the dry strength agent is 0.05wt% of the wood pulp mixed solution.
Quantitative determination in sheet making and forming of 60g/m2Pressing wet paper sheet under 400kPa for 3min, and vacuum-drying at 93 deg.CDrying for 5 min.
Gum dipping solution: adding polyvinyl alcohol and starch into a solvent, mixing at the temperature of 80 ℃, adding an additive, and uniformly mixing to obtain a gum dipping solution; the solvent is distilled water, the addition amount of polyvinyl alcohol is 1.2wt% of the solvent, the addition amount of starch is 0.6wt% of the solvent, the additives are polysorbate-80, polyethylene glycol succinate and diethyl acetyl succinate, the addition amount of polysorbate-80 is 1.2wt% of the solvent, the addition amount of polyethylene glycol succinate is 0.24wt% of the solvent, and the polyethylene glycol succinate and the diethyl acetyl succinate in the additives are mixed according to a mass ratio of 1: mixing at a ratio of 0.45.
Gum dipping treatment: and (3) dipping the paper base layer in the dipping solution for 10min, taking out and drying to obtain the dipped paper base layer.
Glue coating: adding ethylene-vinyl acetate copolymer, hydroxy acrylic acid, polyacrylamide and a functional agent into a liquid reagent, and uniformly mixing to obtain a glue coating solution; the liquid reagent is distilled water and ethanol in a mass ratio of 1: 0.5, the addition amount of the ethylene-vinyl acetate copolymer is 30wt% of the liquid reagent, the addition amount of the hydroxyacrylic acid is 3.5wt% of the liquid reagent, the addition amount of the polyacrylamide is 2.5wt% of the liquid reagent, the functional agent is polyoxyethylene lauryl ether, and the addition amount of the polyoxyethylene lauryl ether is 0.6wt% of the liquid reagent.
Gluing treatment: and coating the gumming liquid on a gumming paper base layer, drying and calendaring to obtain the heat-seal self-adhesive dialyzing paper, wherein the coating weight is 3 wt%.
Example 4:
a preparation method of heat-sealing self-adhesive dialyzing paper,
pulping treatment: soaking the hardwood pulp board for 4h to obtain hardwood pulp, defibering the hardwood pulp for 30min, and pulping to 23-degree SR to obtain hardwood pulp; soaking the softwood pulp board for 4h to obtain softwood pulp, defibering the softwood pulp for 30min, and pulping to 26-degree SR to obtain the softwood pulp; the hardwood pulp content was 10wt% in the hardwood pulp and the softwood pulp content was 10wt% in the softwood pulp.
Softwood pulp boards and hardwood pulp boards are available from special paper industries, ltd, huabang, zhejiang.
Preparing a paper base layer: mixing the hardwood pulp and softwood pulp obtained after pulping treatment, defibering for 30min to obtain a wood pulp mixed solution, adding a wet strength agent and a dry strength agent, stirring for 5min, uniformly mixing to obtain mixed wood pulp, then sheet-making and forming to form wet paper sheets, and squeezing and drying to obtain the paper base layer. Hardwood pulp and softwood pulp are mixed according to the mass ratio of 1: mixed at a ratio of 0.64. The wet strength agent is PAE, and the addition amount of the wet strength agent is 0.16wt% of the wood pulp mixed solution; the dry strength agent is amphoteric polyacrylamide, and the addition amount of the dry strength agent is 0.05wt% of the wood pulp mixed solution.
Quantitative determination in sheet making and forming of 60g/m2Pressing the wet paper sheet under 400kPa for 3min, and vacuumizing and drying at 93 ℃ for 5 min.
Gum dipping solution: adding polyvinyl alcohol and starch into a solvent, mixing at the temperature of 80 ℃, adding an additive, and uniformly mixing to obtain a gum dipping solution; the solvent is distilled water, the addition amount of polyvinyl alcohol is 1.2wt% of the solvent, the addition amount of starch is 0.6wt% of the solvent, the additives are polysorbate-80, polyethylene glycol succinate and diethyl acetyl succinate, the addition amount of polysorbate-80 is 1.2wt% of the solvent, the addition amount of polyethylene glycol succinate is 0.24wt% of the solvent, and the polyethylene glycol succinate and the diethyl acetyl succinate in the additives are mixed according to a mass ratio of 1: mixing at a ratio of 0.45.
Gum dipping treatment: and (3) dipping the paper base layer in the dipping solution for 10min, taking out and drying to obtain the dipped paper base layer.
Glue coating: adding ethylene-vinyl acetate copolymer, hydroxy acrylic acid, polyacrylamide and a functional agent into a liquid reagent, and uniformly mixing to obtain a glue coating solution; the liquid reagent is distilled water and ethanol in a mass ratio of 1: 0.5, the addition amount of the ethylene-vinyl acetate copolymer is 30wt% of the liquid reagent, the addition amount of the hydroxyacrylic acid is 3.5wt% of the liquid reagent, the addition amount of the polyacrylamide is 2.5wt% of the liquid reagent, the functional agents are lauryl alcohol polyoxyethylene ether, calcium lactobionate and disodium adenylate, the addition amount of the lauryl alcohol polyoxyethylene ether is 0.6wt% of the liquid reagent, the amount of the calcium lactobionate in the functional agent is 18wt% of the lauryl alcohol polyoxyethylene ether, and the amount of the disodium adenylate in the functional agent is 12wt% of the lauryl alcohol polyoxyethylene ether.
Gluing treatment: and coating the gumming liquid on a gumming paper base layer, drying and calendaring to obtain the heat-seal self-adhesive dialyzing paper, wherein the coating weight is 3 wt%.
Example 5:
a preparation method of heat-sealing self-adhesive dialyzing paper,
pulping treatment: soaking the hardwood pulp board for 4h to obtain hardwood pulp, defibering the hardwood pulp for 30min, and pulping to 23-degree SR to obtain hardwood pulp; soaking the softwood pulp board for 4h to obtain softwood pulp, defibering the softwood pulp for 30min, and pulping to 26-degree SR to obtain the softwood pulp; the hardwood pulp contained 10wt% hardwood pulp board and the softwood pulp contained 10wt% softwood pulp board.
Softwood pulp boards and hardwood pulp boards are available from special paper industries, ltd, huabang, zhejiang.
Preparing a paper base layer: mixing the hardwood pulp and softwood pulp obtained after pulping treatment, defibering for 30min to obtain a wood pulp mixed solution, adding a wet strength agent and a dry strength agent, stirring for 5min, uniformly mixing to obtain mixed wood pulp, then sheet-making and forming to form wet paper sheets, and squeezing and drying to obtain the paper base layer. Hardwood pulp and softwood pulp are mixed according to the mass ratio of 1: mixed at a ratio of 0.64. The wet strength agent is PAE, and the addition amount of the wet strength agent is 0.16wt% of the wood pulp mixed solution; the dry strength agent is amphoteric polyacrylamide, and the addition amount of the dry strength agent is 0.05wt% of the wood pulp mixed solution.
Quantitative determination in sheet making and forming of 60g/m2Pressing the wet paper sheet under 400kPa for 3min, and vacuumizing and drying at 93 ℃ for 5 min.
Gum dipping solution: adding polyvinyl alcohol and starch into a solvent, mixing at the temperature of 80 ℃, adding an additive, and uniformly mixing to obtain a gum dipping solution; the solvent is distilled water, the addition amount of polyvinyl alcohol is 1.2wt% of the solvent, the addition amount of starch is 0.6wt% of the solvent, the additives are polysorbate-80, polyethylene glycol succinate and diethyl acetyl succinate, the addition amount of polysorbate-80 is 1.2wt% of the solvent, the addition amount of polyethylene glycol succinate is 0.24wt% of the solvent, and the polyethylene glycol succinate and the diethyl acetyl succinate in the additives are mixed according to a mass ratio of 1: mixing at a ratio of 0.45.
Gum dipping treatment: and (3) dipping the paper base layer in the dipping solution for 10min, taking out and drying to obtain the dipped paper base layer.
Glue coating: adding ethylene-vinyl acetate copolymer, hydroxy acrylic acid, polyacrylamide and a functional agent into a liquid reagent, and uniformly mixing to obtain a glue coating solution; the liquid reagent is distilled water and ethanol in a mass ratio of 1: 0.5, the addition amount of the ethylene-vinyl acetate copolymer is 30wt% of the liquid reagent, the addition amount of the hydroxy acrylic acid is 3.5wt% of the liquid reagent, the addition amount of the polyacrylamide is 2.5wt% of the liquid reagent, the functional agents are laurinol polyoxyethylene ether, calcium lactobionate and disodium adenylate, the addition amount of the laurinol polyoxyethylene ether is 0.6wt% of the liquid reagent, the amount of the calcium lactobionate in the functional agent is 25wt% of the laurinol polyoxyethylene ether, and the amount of the disodium adenylate in the functional agent is 18wt% of the laurinol polyoxyethylene ether.
Gluing treatment: and coating the gumming liquid on a gumming paper base layer, drying and calendaring to obtain the heat-seal self-adhesive dialyzing paper, wherein the coating weight is 3 wt%.
Comparative example 1:
this comparative example is different from example 1 only in that no additive was added to the dip.
Comparative example 2:
the comparative example is different from example 1 only in that polyethylene succinate is replaced by diethyl acetyl succinate in the dipping solution.
Comparative example 3:
this comparative example is different from example 5 only in that no disodium adenosine phosphate was contained in the functional agent in the dope solution.
Comparative example 4:
this comparative example is different from example 5 only in that the functional agent in the size solution does not contain calcium lactobionate.
Test example 1:
1. heat seal Strength test
Test samples: the heat-sealable self-adhesive type dialysis papers obtained in the respective examples and comparative examples were prepared.
And (5) testing the heat sealing strength of the test sample and the PE film coated paper on a heat sealing tester.
Parameters of the heat sealing process are as follows: the heat-sealing temperature ranges are as follows: 160 ℃, heat-seal pressure: 0.3MPa, heat-seal time: 0.5 s.
The results of the heat-seal strength test of the heat-seal self-adhesive type dialyzing paper are shown in FIG. 1, the heat-seal strength of the heat-seal self-adhesive type dialyzing paper obtained in example 1 was 5.6N/15 mm, the heat-seal strength of the heat-seal self-adhesive type dialyzing paper obtained in example 2 was 6.3N/15 mm, the heat-seal strength of the heat-seal self-adhesive type dialyzing paper obtained in example 3 was 6.9N/15 mm, and the heat-seal strength of the heat-seal self-adhesive type dialyzing paper was improved by using diethyl acetylsuccinate in the process of preparing the heat-seal self-adhesive type dialyzing paper in examples 2 to 3 as compared with example 1; the heat-seal strength of the heat-seal self-adhesive dialyzing paper obtained in the comparative example 1 is 5.2N/15 mm, the heat-seal strength of the heat-seal self-adhesive dialyzing paper obtained in the comparative example 2 is 5.3N/15 mm, and the comparison between the comparative example 1 and the comparative example 2 shows that the heat-seal strength of the self-adhesive dialyzing paper is not affected basically by using only diethyl acetylsuccinate when polyethylene succinate is not used, and the comparison between the example 1 and the comparative example 1 shows that the polyethylene succinate improves the heat-seal strength of the self-adhesive dialyzing paper; the heat-seal strength of the heat-seal self-adhesive type dialyzing paper obtained in example 4 was 7.1N/15 mm, the heat-seal strength of the heat-seal self-adhesive type dialyzing paper obtained in example 5 was 7.4N/15 mm, and examples 4 to 5 showed that the heat-seal strength of the heat-seal self-adhesive type dialyzing paper was further improved by using calcium lactobionate and disodium adenylate during the preparation of the heat-seal self-adhesive type dialyzing paper, as compared with example 3; the heat-seal strength of the heat-seal self-adhesive type dialysis paper obtained in comparative example 3 was 7.0N/15 mm, the heat-seal strength of the heat-seal self-adhesive type dialysis paper obtained in comparative example 4 was 6.9N/15 mm, and example 5 showed superior effects of the use of calcium lactobionate together with disodium adenylate in comparison with comparative examples 3 to 4.
The heat-seal strength of the heat-seal self-adhesive dialyzing paper obtained by the invention is more than 5.5N/15 mm.
2. Tensile Property test
Test samples: the heat-sealable self-adhesive type dialysis papers obtained in the respective examples and comparative examples were prepared.
The test method comprises the following steps: GB/T12914-.
The results of the tensile property test of the heat-seal self-adhesive type dialyzing paper are shown in FIG. 2, the tensile index of the heat-seal self-adhesive type dialyzing paper obtained in example 1 was 98.13 N.m/g, the tensile index of the heat-seal self-adhesive type dialyzing paper obtained in example 2 was 104.37 N.m/g, the tensile index of the heat-seal self-adhesive type dialyzing paper obtained in example 3 was 107.51 N.m/g, and the use of diethyl acetylsuccinate in the process of preparing the heat-seal self-adhesive type dialyzing paper showed that the tensile index of the heat-seal self-adhesive type dialyzing paper was increased as compared with example 1 in examples 2-3; the tensile index of the heat-seal self-adhesive type dialysis paper obtained in comparative example 1 was 95.02N · m/g, the tensile index of the heat-seal self-adhesive type dialysis paper obtained in comparative example 2 was 95.43N · m/g, and comparison of comparative example 1 with comparative example 2 shows that the use of only diethyl acetylsuccinate had no effect on the tensile index of the self-adhesive type dialysis paper when polyethylene succinate was not used, and comparison of example 1 with comparative example 1 shows that polyethylene succinate increased the tensile index of the self-adhesive type dialysis paper; the heat-seal self-adhesive type dialysis paper obtained in example 4 had a tensile index of 111.39N · m/g, the heat-seal self-adhesive type dialysis paper obtained in example 5 had a tensile index of 115.26N · m/g, and examples 4 to 5 showed that the use of calcium lactobionate and disodium adenylate salt in the preparation of the heat-seal self-adhesive type dialysis paper further improved the tensile index of the heat-seal self-adhesive type dialysis paper, compared with example 3; the heat-seal self-adhesive type dialysis paper obtained in comparative example 3 had a tensile index of 109.28 N.m/g, the heat-seal self-adhesive type dialysis paper obtained in comparative example 4 had a tensile index of 107.57 N.m/g, and example 5 showed superior effects of calcium lactobionate and disodium adenylate salt used together, as compared with comparative examples 3 to 4.
The heat-seal self-adhesive dialyzing paper obtained by the invention has a tensile index of more than 97 N.m/g.
3. Tear Performance test
Test samples: the heat-sealable self-adhesive type dialysis papers obtained in the respective examples and comparative examples were prepared.
The test method comprises the following steps: GB/T455-2002.
The results of the tear property test of the heat-seal self-adhesive type dialyzing paper are shown in FIG. 3, and the tear index of the heat-seal self-adhesive type dialyzing paper obtained in example 1 was 10.81 mN · m2(g), the tear index of the heat-sealable self-adhesive dialyzing paper obtained in example 2 was 11.34 mN. m2(g), the tear index of the heat-sealable self-adhesive dialyzing paper obtained in example 3 was 11.73 mN. m2(iv)/g, comparison of examples 2-3 with example 1, shows that the use of diethyl acetyl succinate in the preparation of heat-seal self-adhesive dialysis paper increases the tear index of the heat-seal self-adhesive dialysis paper; the tear index of the heat-seal self-adhesive type dialyzing paper obtained in comparative example 1 was 10.54 mN. m2(g), the tear index of the heat-seal self-adhesive type dialyzing paper obtained in comparative example 2 was 10.68 mN. m2The comparison of comparative example 1 with comparative example 2 shows that only diethyl sulfosuccinate has no influence on the tearing index of the self-adhesive dialysis paper when polyethylene glycol succinate is not used, and the comparison of example 1 with comparative example 1 shows that polyethylene glycol succinate improves the tearing index of the self-adhesive dialysis paper; the heat-sealable self-adhesive dialyzing paper obtained in example 4 had a tear index of 12.28 mN · m2(g), the tear index of the heat-sealable self-adhesive dialyzing paper obtained in example 5 was 12.63 mN · m2(iv)/g, examples 4-5 compared to example 3, show that the use of calcium lactobionate and disodium adenylate salt during the preparation of heat-seal self-adhesive dialysis paper further improves the tear index of the heat-seal self-adhesive dialysis paper; the tear index of the heat-seal self-adhesive type dialyzing paper obtained in comparative example 3 was 12.06 mN. m2(g), the tear index of the heat-seal self-adhesive type dialyzing paper obtained in comparative example 4 was 11.82 mN. m2The results of example 5, compared with comparative examples 3-4, show that calcium lactobionate and disodium adenylate are superior when used together.
The tearing index of the heat-seal self-adhesive dialyzing paper obtained by the invention is 10.7 mN.m2More than g.
Test example 2:
1. peel test
Test samples: the heat-sealable self-adhesive type dialysis papers obtained in the respective examples and comparative examples were prepared.
The determination method comprises the following steps: and (3) sticking a 15mm transparent adhesive tape on the surface of the paper, then peeling off the paper at a constant speed, and checking the fluffing condition of the surface of the paper.
The heat-seal self-adhesive dialyzing paper prepared by the method of each embodiment and the comparative example has no fluffing phenomenon.
2. Storage stability
Test samples: the heat-sealable self-adhesive type dialysis papers obtained in the respective examples and comparative examples were prepared.
After 3 months of storage, peel tests were performed.
The heat-seal self-adhesive dialyzing paper prepared by the method of each embodiment and the comparative example of the invention has no fluffing phenomenon after being stored and placed for 3 months.
Test example 3:
1. bacteria resistance test
Test samples: the heat-sealable self-adhesive type dialysis papers obtained in the respective examples and comparative examples were prepared.
Testing strains: the bacillus subtilis is purchased from China center for culture collection and management of industrial microorganisms.
Nutrient agar medium: 3g of beef extract, 5g of peptone, 5g of sodium chloride, 15g of agar and 1000mL of distilled water, and adjusting the pH value to 7.0
(1) And (3) strain culture: 5mgMnSO is added into the nutrient agar culture medium4·H2And O, culturing the bacillus for 24 h.
(2) Diluting the cultured Bacillus species to obtain 107cfu/mL of Bacillus subtilis suspension.
(3) The test specimens were cut into square paper substrates having a side length of 50mm, and 5 paper substrates in each group were used as parallel samples and sterilized.
(4) The sterilized sample was transferred to a sterile plate and 10 was taken75 drops of cfu/mL bacillus subtilis suspension, each drop is 0.1mL, the drops are uniformly dropped on the outer surface of the sample without contacting, and the sample is dried for 12 hours at the temperature of 25 ℃ and the relative humidity of 50%.
(5) After drying, completely paving the inner surface of the bacterial sample on the surface of a nutrient agar culture medium, and discarding the bacterial sample after 5 s; the nutrient agar culture medium is cultured for 24 hours at 37 ℃, the growth condition of bacteria is observed, and the number of the grown bacteria is recorded in a detection record table of a bacterium-resistant paper substrate.
The results of the bacteria resistance test of the heat-seal self-adhesive type dialyzing paper are shown in fig. 4, the number of bacteria of the heat-seal self-adhesive type dialyzing paper obtained in example 1 is 617, the number of bacteria of the heat-seal self-adhesive type dialyzing paper obtained in example 2 is 534, the number of bacteria of the heat-seal self-adhesive type dialyzing paper obtained in example 3 is 481, and examples 2 to 3 show that the number of bacteria of the heat-seal self-adhesive type dialyzing paper is increased by using diethyl acetylsuccinate in the process of preparing the heat-seal self-adhesive type dialyzing paper compared with example 1; the number of bacteria of the heat-seal self-adhesive type dialyzing paper obtained in the comparative example 1 is 652, the number of bacteria of the heat-seal self-adhesive type dialyzing paper obtained in the comparative example 2 is 658, and the comparison between the comparative example 1 and the comparative example 2 shows that when polyethylene succinate is not used, the use of diethyl acetyl succinate only has no influence on the number of bacteria of the self-adhesive type dialyzing paper, and the comparison between the example 1 and the comparative example 1 shows that the polyethylene succinate improves the number of bacteria of the self-adhesive type dialyzing paper; the number of bacteria of the heat-seal self-adhesive type dialyzing paper obtained in example 4 was 376, the number of bacteria of the heat-seal self-adhesive type dialyzing paper obtained in example 5 was 334, and examples 4 to 5 showed that the number of bacteria of the heat-seal self-adhesive type dialyzing paper was further increased by using calcium lactobionate and disodium adenylate in the process of preparing the heat-seal self-adhesive type dialyzing paper, as compared with example 3; the number of bacteria of the heat-seal self-adhesive type dialyzing paper obtained in comparative example 3 was 437, the number of bacteria of the heat-seal self-adhesive type dialyzing paper obtained in comparative example 4 was 452, and it was revealed that the effect of using calcium lactobionate and disodium adenylate together was superior in example 5 as compared with comparative examples 3 to 4.
The heat-seal self-adhesive dialyzing paper obtained by the invention has good bacterium resistance, and the number of bacteria penetrating through the paper base layer is less than 630.
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 (4)
1. A heat-sealable self-adhesive dialysis paper comprising:
a paper base layer, and a functional layer attached to the paper base layer; the functional layer comprises a glue dipping layer and a glue coating;
the glue coating is arranged on the glue dipping layer; the glue dipping layer and the glue coating layer mutually permeate;
the glue dipping layer is obtained by dipping the paper base layer in a dipping solution, wherein the dipping solution contains polyvinyl alcohol, starch, an additive and a solvent, the addition amount of the polyvinyl alcohol is 0.5-2wt% of the solvent, and the addition amount of the starch is 0.1-1wt% of the solvent; the additive contains polyethylene glycol succinate and diethyl sulfosuccinate, the addition amount of the polyethylene glycol succinate is 0.02-0.4wt% of the solvent, and the mass ratio of the polyethylene glycol succinate to the diethyl sulfosuccinate is 1: mixing at a ratio of 0.1-0.6.
2. A heat-sealable self-adhesive dialysis paper as claimed in claim 1, wherein: the paper base layer contains a dry strength agent and a wet strength agent.
3. A method for preparing the heat-seal self-adhesive type dialysis paper of claim 1, comprising:
dipping the paper base layer in a dipping solution to obtain a dipped paper base layer;
the gum dipping paper base layer is subjected to gum coating and press polishing treatment in a gum coating liquid to obtain heat-sealing self-adhesion dialyzing paper;
the preparation of the heat-seal self-adhesive dialyzing paper also comprises a pulping process and a paper base layer preparation process;
the raw materials in the pulping treatment comprise broadleaf wood pulp and softwood pulp boards;
the gum dipping solution contains starch, polyvinyl alcohol and an additive; the additive contains polyethylene glycol succinate and diethyl sulfosuccinate.
4. The method for preparing heat-seal self-adhesive dialyzing paper according to claim 3, wherein the method comprises the following steps: the glue coating liquid contains ethylene-vinyl acetate copolymer, hydroxy acrylic acid, polyacrylamide and a functional agent.
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| CN1298347A (en) * | 1998-04-07 | 2001-06-06 | 西德尔研究公司 | Water dispersible/redispersible hydrophobic polyester resins and their application in coatings |
| CN102153968A (en) * | 2011-05-26 | 2011-08-17 | 广州德渊精细化工有限公司 | Hot melt adhesive for medical dialyzing paper |
| CN103788893A (en) * | 2014-01-14 | 2014-05-14 | 安徽金门工贸有限公司 | Hot melt adhesive for medical dialyzing paper |
| CN110939009A (en) * | 2019-12-18 | 2020-03-31 | 安徽华邦古楼新材料有限公司 | Production method of heat-sealing self-adhesive medical dialyzing paper |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1298347A (en) * | 1998-04-07 | 2001-06-06 | 西德尔研究公司 | Water dispersible/redispersible hydrophobic polyester resins and their application in coatings |
| CN102153968A (en) * | 2011-05-26 | 2011-08-17 | 广州德渊精细化工有限公司 | Hot melt adhesive for medical dialyzing paper |
| CN103788893A (en) * | 2014-01-14 | 2014-05-14 | 安徽金门工贸有限公司 | Hot melt adhesive for medical dialyzing paper |
| CN110939009A (en) * | 2019-12-18 | 2020-03-31 | 安徽华邦古楼新材料有限公司 | Production method of heat-sealing self-adhesive medical dialyzing paper |
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