CN113369115A - High-permeability packaging material and preparation method thereof - Google Patents
High-permeability packaging material and preparation method thereof Download PDFInfo
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- CN113369115A CN113369115A CN202110582913.9A CN202110582913A CN113369115A CN 113369115 A CN113369115 A CN 113369115A CN 202110582913 A CN202110582913 A CN 202110582913A CN 113369115 A CN113369115 A CN 113369115A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/24—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials for applying particular liquids or other fluent materials
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C1/00—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating
- B05C1/04—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length
- B05C1/08—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line
- B05C1/0808—Details thereof, e.g. surface characteristics
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C1/00—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating
- B05C1/04—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length
- B05C1/08—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line
- B05C1/0826—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line the work being a web or sheets
- B05C1/0834—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line the work being a web or sheets the coating roller co-operating with other rollers, e.g. dosing, transfer rollers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/28—Processes for applying liquids or other fluent materials performed by transfer from the surfaces of elements carrying the liquid or other fluent material, e.g. brushes, pads, rollers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D65/00—Wrappers or flexible covers; Packaging materials of special type or form
- B65D65/38—Packaging materials of special type or form
- B65D65/40—Applications of laminates for particular packaging purposes
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Wrappers (AREA)
- Packages (AREA)
Abstract
The invention discloses a high-permeability packaging material for packaging medical instruments, wherein a film layer structure of the packaging material sequentially comprises a first heat sealing layer, a base material layer and/or a second heat sealing layer from inside to outside, the first heat sealing layer and/or the second heat sealing layer are prepared by coating materials containing heat-sealing resin on one side or two sides of the base material layer by adopting a gravure printing method to respectively form the first heat sealing layer and/or the second heat sealing layer. The invention also discloses a preparation method of the high-permeability packaging material. The packaging material has good porosity, uniform pores and small holes, achieves excellent ventilation effect, reduces the sterilization difficulty of ethylene oxide, improves the sterilization effect of ethylene oxide and the like, and keeps long-term sterile effect in transportation, storage and use of medical instruments packaged by the packaging material.
Description
Technical Field
The invention relates to the technical field of packaging materials, in particular to a high-permeability packaging material for medical instrument packaging and a preparation method thereof.
Background
The medical instrument sterilization package is used as an important component of medical instruments, is widely applied to the production of product packages of sterile medical instruments, and ensures that the medical instrument products keep the sterile conditions of the products in transportation, storage and use. Paper plastic bags, aluminum plastic bags, dialysis paper with excellent air permeability, tyvek films and plastic uptake forming films and plastic uptake boxes made of various materials are main materials for sterilizing and packaging medical instruments.
Dialysis paper is widely used for medical sterilization, and dialysis is used for preventing a part of things and allowing a part of things to penetrate. Dialysis paper used for medical device sterilization generally allows sterilization factors such as EO ethylene oxide, but microorganisms are blocked. The microorganism isolation refers to the property that the dialyzing paper can prevent microorganisms in the external environment from permeating, so as to avoid causing bacterial infection in the sterilization process of medical instruments or after sterilization.
Dialysis paper is generally made of base paper by glue coating, printing and bag making, and is used for packaging medical instruments for sterilization. In the existing process of manufacturing some dialysis papers, the base paper is coated in a full-coating mode generally, but the full-coating mode not only increases the usage amount of glue and the manufacturing cost, but also sacrifices the air permeability to a certain extent; and the dialysis paper coated with the coating is adopted to package the medical apparatus and instruments, the gas permeability is poor in the ethylene oxide sterilization process, the sterilization difficulty is increased, the bag is easy to burst in the sterilization and analysis process, and the yield is reduced.
Disclosure of Invention
The invention aims to provide a high-permeability packaging material which can reduce the production cost, improve the air permeability, reduce the sterilization difficulty, improve the yield and has a simple manufacturing process.
In order to achieve the purpose, the technical scheme of the invention is to design a high-permeability packaging material, wherein a film layer structure of the packaging material sequentially comprises a first heat sealing layer, a base material layer and/or a second heat sealing layer from inside to outside, the first heat sealing layer and/or the second heat sealing layer are/is prepared by coating a material containing heat-sealing resin on one side or two sides of the base material layer by adopting a gravure printing method to form the first heat sealing layer and/or the second heat sealing layer respectively. The invention adopts the base material with good air permeability as the base material layer, adopts the gravure coating method to coat the heat-sealing resin raw material on one side or two sides of the base material layer at fixed points discontinuously, coats the gravure at fixed points, the heat-seal resin raw material on the surface of the base material layer is coated on the surface of the base material layer in a fixed-point and array discontinuous manner, the heat-seal resin raw material cannot form a continuous film layer structure on the surface of the base material layer, and the part of the base material layer which is not coated with the heat-seal resin raw material forms a breathable pore, the heat-seal resin raw material gravure fixed-point coating method ensures that the packaging material has good porosity, the packaging material has uniform pores and small holes, achieves excellent ventilation effect, reduces the sterilization difficulty of ethylene oxide, improves the sterilization effect of ethylene oxide and the like, and ensures that medical instruments packaged by the packaging material can keep long-term sterile effect in transportation, storage and use.
In order to meet the requirements of different products, the preferable technical scheme is that the base material layer comprises Tyvek, dialyzing paper, non-woven fabric or paper. The non-woven fabric is selected as a substrate layer for printing and preparing a desiccant packaging material; the Tyvek or the dialyzing paper is selected as the base material layer to be used for preparing the medical instrument packaging material.
The further preferable technical scheme is that the raw material containing the heat-seal resin comprises, by weight, 60-80% of aqueous resin with a solid content of 40-45%, 10-30% of aqueous synthetic rubber resin with a solid content of 65-70%, 1-3% of ammonia water, 0.1-0.3% of dispersing agent and 0.1-0.3% of defoaming agent. The water-based resin is used as the main component of the heat-sealing resin raw material, and the water-based synthetic rubber resin is used as the organic filler, so that the printability of the heat-sealing resin raw material is improved.
Further preferably, the heat-sealing resin further comprises 0.01-0.1% of dye. The temperature-resistant dye suitable for printing and dyeing and heat sealing is added into the heat-seal resin, the identification degree of the heat-seal resin printed on the substrate layer is increased, and the position of the heat-seal resin is indicated.
Further preferably, the raw material containing the heat-seal resin further comprises 5-10% of an inorganic filler. A small amount of inorganic filler is added into the heat-seal resin raw material, so that the film forming capability of the heat-seal resin raw material on the surface of the printing base material layer can be reduced; in addition, the micro-pore structure on the surface of the inorganic filler improves the air permeability of the packaging material.
Further preferably, the inorganic filler comprises zinc oxide, fumed silica and titanium dioxide, wherein the weight ratio of the zinc oxide to the fumed silica to the titanium dioxide is 1: 2-3: 1, the particle size of the inorganic filler is 0.1-1 um. Zinc oxide can improve antibacterial activity, silicon dioxide can increase air permeability, and titanium dioxide can improve whiteness.
In order to improve the heat seal strength of the packaging material, a further preferred technical scheme is that the water-based resin comprises water-based EVA emulsion or water-based PE emulsion.
The invention also discloses a preparation method of the high-permeability packaging material, which comprises the following steps:
s1: manufacturing a printing plate, namely manufacturing the printing plate with the pit array arrangement on the surface;
s2: preparing raw materials containing heat-seal resin, measuring the components of the raw materials according to weight percentage, sequentially adding aqueous EVA or PE resin, aqueous synthetic rubber resin, ammonia water, inorganic filler, dispersant and defoamer into a homogenizing mixer, and stirring for 1-10h to prepare uniformly dispersed heat-seal resin raw materials;
s3: and (4) printing and coating the heat-seal resin raw material, namely adding the heat-seal resin raw material into an ink tank or an adhesive tank of a gravure printing machine, unreeling the to-be-printed base material, and performing array printing and coating of heat-seal resin on one side or two sides of the to-be-printed base material by adopting the printing plate manufactured in the step S2 to prepare the high-permeability packaging material.
The preparation method of the high-permeability packaging material has the advantages of simple process, low cost and high manufacturing efficiency of the packaging material.
In order to improve the air permeability of the packaging material, the preferred technical scheme is that the array pits on the surface of the printing plate manufactured in the step S1 have a pitch of 10-100um, a pit depth of 10-80um and a pit chamfer angle of 30-60 °. The pits are regularly arranged in an array at intervals, and the points which are not coated with the heat-seal resin are increased in unit area, so that the air permeability of the packaging material is improved.
In a further preferable technical scheme, in the step S3, a heating roller or an oven is further provided to heat the substrate to be printed and the heat-seal resin, and the temperature of the heating roller or the oven is 40 to 80 ℃. Set up warming mill or oven and treat printing substrate and heat-seal resin and heat, be favorable to the improvement and the drying of the adhesion of printing resin, can not set up too high heating temperature simultaneously again, avoid too high temperature to make heat-seal resin too glutinous, reduced the printability of heat-seal resin, and destroyed the roughness on the packaging material surface of heat-seal resin printed on the substrate surface, influence the outward appearance roughness and the aesthetic property of follow-up printing ink layer surface printing.
The invention has the advantages and beneficial effects that: the invention adopts the base material with good air permeability as the base material layer, adopts the gravure coating method to coat the heat-sealing resin raw material on one side or two sides of the base material layer at fixed points discontinuously, coats the gravure at fixed points, the heat-seal resin raw material on the surface of the base material layer is coated on the surface of the base material layer in a fixed-point and array discontinuous manner, the heat-seal resin raw material can not form a continuous film layer structure on the surface of the base material layer, the air permeability of the base material position without coating the heat-seal resin raw material is not influenced, the heat-seal resin raw material gravure fixed-point coating method ensures that the packaging material has good porosity, the packaging material has uniform pores and small holes, achieves excellent ventilation effect, reduces the sterilization difficulty of ethylene oxide, improves the sterilization effect of ethylene oxide and the like, and ensures that medical instruments packaged by the packaging material can keep long-term sterile effect in transportation, storage and use. The preparation method of the high-permeability packaging material has the advantages of simple process, low cost and high film-making efficiency.
Drawings
FIG. 1 is a schematic view of the printing preparation of the highly breathable packaging material of the present invention.
In the figure: 1. a substrate layer; 2. printing plate; 3. a pit; 4. a heat-seal resin.
Detailed Description
The following description of the embodiments of the present invention will be made with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
Example 1
The invention relates to a high-permeability packaging material, wherein a film layer structure of the packaging material sequentially comprises a first heat-sealing layer and a base material layer 1 from inside to outside; the substrate layer is Tyvek; the first heat-sealing layer is prepared by coating a material containing heat-sealing resin on one side or both sides of the substrate layer by a gravure printing method to form a first heat-sealing layer and/or a second heat-sealing layer respectively.
The raw materials containing the heat-seal resin comprise, by weight, 70% of aqueous EVA emulsion with a solid content of 40%, 20% of aqueous butyl rubber resin with a solid content of 65%, 7.6% of inorganic filler, 2% of ammonia water, 0.2% of dispersing agent and 0.2% of defoaming agent. The dispersant includes aliphatic amides such as ethylene bis stearamide or stearamide; polyethylene wax powder, high-molecular block copolymer, silicate dispersant, polycarboxylic acid ammonium salt and the like; the defoaming agent comprises defoaming agents such as mineral oil and organic silicon; for example: foamaster MO 2190 antifoam from basf, germany, Foamex 1488 antifoam from basf, Adcote 7R1 antifoam from dow.
The inorganic filler comprises zinc oxide, fumed silica and titanium dioxide, wherein the weight ratio of the zinc oxide to the fumed silica to the titanium dioxide is 1: 2: 1, the particle size of the inorganic filler is 1-5 um.
The preparation method of the high-permeability packaging material comprises the following steps:
s1: manufacturing a printing plate 2, manufacturing the printing plate with pits 3 arranged in an array manner, wherein the interval of the array pits on the surface of the printing plate is 50um, the depth of the pits is 45um, and the chamfer angle of the pits is 45 degrees;
s2: preparing raw materials containing heat-seal resin, measuring the components of the raw materials according to weight percentage, sequentially adding aqueous EVA emulsion, aqueous butyl rubber resin, ammonia water, inorganic filler, dispersant and defoamer into a homogenizing mixer, and uniformly stirring to prepare a heat-seal resin raw material;
s3: printing and coating a heat-seal resin raw material, namely adding the heat-seal resin raw material into a glue groove of a gravure printing machine, and unreeling a substrate to be printed on a heating roller, wherein the temperature of the heating roller is 60 ℃; and (4) performing array printing and coating of the heat-seal resin raw material on one side or two sides of the base material to be printed by using the printing plate manufactured in the step (S1) to manufacture the high-permeability packaging material.
Example 2
Example 2 differs from example 1 in that the raw material containing the heat-seal resin comprises 60% of aqueous EVA emulsion with solid content of 40%, 30% of aqueous butyl rubber resin with solid content of 65%, 5.4% of inorganic filler, 3% of ammonia water, 0.3% of dispersant and 0.3% of defoaming agent in percentage by weight.
Example 3
Example 3 differs from example 1 in that the raw material comprising the heat-seal resin comprises, in weight percent, 56.4% of an aqueous EVA emulsion with a solid content of 40%, 30% of an aqueous butyl rubber resin with a solid content of 65%, 10% of an inorganic filler, 3% of ammonia water, 0.3% of a dispersant, and 0.3% of a defoaming agent.
Example 4
Example 4 differs from example 1 in that the aqueous resin is an aqueous PE emulsion.
Example 5
Example 5 differs from example 1 in that the raw material comprising the heat-seal resin comprises, in weight percent, 70% of an aqueous EVA emulsion with a solid content of 40%, 20% of an aqueous butyl rubber resin with a solid content of 65%, 7.5% of an inorganic filler, 2% of ammonia water, 0.2% of a dispersant, 0.2% of an antifoaming agent, and 0.1% of a dye, the dye comprising one of a medical grade brilliant blue pigment, a medical grade brilliant green pigment, and a medical grade thermochromic pigment.
Example 6
Example 6 differs from example 1 in that the inorganic filler comprises zinc oxide and fumed silica, wherein the weight ratio of zinc oxide to fumed silica is 1: 2.
example 7
The embodiment 7 is different from the embodiment 1 in that the invention relates to a high-permeability packaging material, and a film layer structure of the packaging material sequentially comprises a first heat-sealing layer, a base material layer and a second heat-sealing layer from inside to outside; the first heat-sealing layer and the second heat-sealing layer are made of materials containing heat-sealing resin instead of printing ink, the materials are coated on the two sides of the base material layer by adopting a gravure coating method to form the first heat-sealing layer and the second heat-sealing layer respectively, and the heat-sealing mode is carried out by lapping and sealing through the first heat-sealing layer and the second heat-sealing layer.
Example 8
Example 8 differs from example 1 in that the substrate layer is paper.
The composite membranes prepared in the above embodiments are subjected to performance detection, and the detection results are as follows:
| heat sealing Strength (N) | Air permeability (S/100cc) | |
| Example 1 | 4～5 | 80～100 |
| Example 2 | 3～4 | 70～90 |
| Example 3 | 2～3.5 | 60～90 |
| Example 4 | 4～5 | 80～100 |
| Example 5 | 4～5 | 80～90 |
| Example 6 | 4～5 | 70～95 |
| Example 7 | 4～5 | 80～120 |
| Example 8 | 4～5 | 120～150 |
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the technical principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. The high-air-permeability packaging material is characterized in that a film layer structure of the packaging material sequentially comprises a first heat sealing layer, a base material layer and/or a second heat sealing layer from inside to outside, wherein the first heat sealing layer and/or the second heat sealing layer are formed by coating materials containing heat-sealing resin on one side or two sides of the base material layer by adopting a gravure printing method.
2. The highly breathable packaging material of claim 1, wherein the substrate layer comprises tyvek, dialyzed paper, non-woven fabric, or paper.
3. The highly breathable packaging material according to claim 2, wherein the raw material containing the heat-seal resin comprises, in weight percent, 60-80% of an aqueous resin having a solid content of 40-45%, 10-30% of an aqueous synthetic rubber resin having a solid content of 65-70%, 1-3% of ammonia water, 0.1-0.3% of a dispersant, and 0.1-0.3% of a defoamer.
4. A highly breathable packaging material according to claim 3, characterized in that said raw material comprising heat-seal resin further comprises 0.01-0.1% of a dye.
5. A highly breathable packaging material according to claim 4, characterized in that said raw material comprising heat-seal resin further comprises 5-10% of inorganic filler.
6. The high gas-permeable packaging material according to claim 5, wherein the inorganic filler comprises zinc oxide, fumed silica, and titanium dioxide, wherein the weight ratio of zinc oxide, silica, and titanium dioxide is 1: 2-3: 1, the particle size of the inorganic filler is 0.1-1 um.
7. The highly breathable packaging material of claim 6, wherein the aqueous resin comprises an aqueous EVA emulsion or an aqueous PE emulsion.
8. A method for preparing a high permeability packaging material according to claim 7, comprising the steps of:
s1: manufacturing a printing plate, namely manufacturing the printing plate with the pit array arrangement on the surface;
s2: preparing raw materials containing heat-seal resin, measuring the components of the raw materials according to weight percentage, sequentially adding aqueous EVA or PE resin, aqueous synthetic rubber resin, ammonia water, inorganic filler, dispersant and defoamer into a homogenizing mixer, and stirring for 1-10h to prepare uniformly dispersed heat-seal resin raw materials;
s3: and (4) printing and coating the heat-seal resin raw material, namely adding the heat-seal resin raw material into an ink tank or an adhesive tank of a gravure printing machine, unreeling the to-be-printed base material, and performing array printing and coating of heat-seal resin on one side or two sides of the to-be-printed base material by adopting the printing plate manufactured in the step S2 to prepare the high-permeability packaging material.
9. The method for preparing a highly breathable packaging material according to claim 8, wherein the array pits on the surface of the printing plate manufactured in step S1 have a pitch of 10 to 100um, a pit depth of 10 to 80um, and a pit chamfer of 30 to 60 °.
10. The method for preparing a highly air-permeable packaging material according to claim 9, wherein the step S3 further comprises heating the substrate to be printed and the heat-seal resin by using a heating roller or an oven, wherein the temperature of the heating roller or the oven is 40-80 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110582913.9A CN113369115A (en) | 2021-05-27 | 2021-05-27 | High-permeability packaging material and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110582913.9A CN113369115A (en) | 2021-05-27 | 2021-05-27 | High-permeability packaging material and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116516720A (en) * | 2023-05-25 | 2023-08-01 | 福建凯龙医疗卫生材料有限公司 | Medical dialyzing paper with two-sided gluing and production process |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3467296A (en) * | 1966-04-11 | 1969-09-16 | Riegel Paper Corp | Packaging material and method of manufacturing the same |
| JP2000085868A (en) * | 1998-09-09 | 2000-03-28 | Sumisho Kami Pulp Kk | Clothes packaging material and cover for packaging clothes |
| CN108587521A (en) * | 2018-04-20 | 2018-09-28 | 无锡市健鼎包装技术有限公司 | A kind of medical dialyzing paper aqueous coating heat-seal adhesive and its coating process |
| CN111945477A (en) * | 2020-08-14 | 2020-11-17 | 上海紫华薄膜科技有限公司 | Release heat-sealing packaging paper and manufacturing method thereof |
-
2021
- 2021-05-27 CN CN202110582913.9A patent/CN113369115A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3467296A (en) * | 1966-04-11 | 1969-09-16 | Riegel Paper Corp | Packaging material and method of manufacturing the same |
| JP2000085868A (en) * | 1998-09-09 | 2000-03-28 | Sumisho Kami Pulp Kk | Clothes packaging material and cover for packaging clothes |
| CN108587521A (en) * | 2018-04-20 | 2018-09-28 | 无锡市健鼎包装技术有限公司 | A kind of medical dialyzing paper aqueous coating heat-seal adhesive and its coating process |
| CN111945477A (en) * | 2020-08-14 | 2020-11-17 | 上海紫华薄膜科技有限公司 | Release heat-sealing packaging paper and manufacturing method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116516720A (en) * | 2023-05-25 | 2023-08-01 | 福建凯龙医疗卫生材料有限公司 | Medical dialyzing paper with two-sided gluing and production process |
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Application publication date: 20210910 |