CN114657816B - Wrapping paper for sanitary products and production process thereof - Google Patents
Wrapping paper for sanitary products and production process thereof Download PDFInfo
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- CN114657816B CN114657816B CN202210210707.XA CN202210210707A CN114657816B CN 114657816 B CN114657816 B CN 114657816B CN 202210210707 A CN202210210707 A CN 202210210707A CN 114657816 B CN114657816 B CN 114657816B
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- polyethylene wax
- heat
- branched polyethylene
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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
- D21H27/30—Multi-ply
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B29/00—Layered products comprising a layer of paper or cardboard
Abstract
The application relates to the field of sanitary product packaging materials, and particularly discloses a packaging paper for sanitary products and a production process thereof. The packaging paper for the sanitary products sequentially comprises a release layer, a heat sealing layer, a paper substrate and a heat sealing layer from one side close to the content; the release layer comprises 78-94% of aqueous acrylic emulsion, 5-20% of acrylic grafted branched polyethylene wax, 0.3-0.8% of flatting agent, 0.3-0.6% of emulsifying agent and 0.4-0.6% of defoaming agent; the preparation method of the acrylic acid grafted branched polyethylene wax comprises the following steps: adding branched polyethylene wax into an organic solvent to obtain a branched polyethylene wax solution; adding an acrylic acid monomer and an initiator into an organic solvent to obtain an acrylic acid solution; and (3) dripping the acrylic acid solution into the branched polyethylene wax solution for reaction, adding ethanol into the reaction product, stirring, filtering, drying and purifying to obtain the product. The wrapping paper of this application is used for packing sanitary articles, can realize the heat-seal function, dampproofing dustproof.
Description
Technical Field
The present application relates to the field of sanitary product packaging materials, and more particularly, to a packaging paper for sanitary products and a production process thereof.
Background
For a long time, the packaging of sanitary articles such as sanitary napkins, diapers or pads has generally employed PE films as packaging carriers. It can be seen that the common packaging forms all adopt PE films as packaging carriers, however, the PE films are difficult to degrade after being discarded, and the environment is polluted. Therefore, more and more manufacturers use wrapping paper instead of PE films as a wrapping material for sanitary products.
Currently, there is an environmental protection type packaging paper, which includes a paper substrate, one surface of the paper substrate, which is close to the content, is coated with a heat sealing layer, and an area of the surface of the heat sealing layer, which corresponds to the content, is also coated with an organosilicon anti-adhesion layer, so that adhesion of the heat sealing layer to the content is prevented. However, the packaging paper with the above structure cannot realize complete heat sealing of the content, so that the sealing is not tight, and the content cannot be effectively moisture-proof and dust-proof.
Disclosure of Invention
In order to facilitate heat sealing of the packaging paper and provide good dampproof and dustproof functions, the application provides the packaging paper for the sanitary products and a production process thereof.
In a first aspect, the present application provides a packaging paper for sanitary products, which adopts the following technical scheme:
the packaging paper for the sanitary products sequentially comprises a release layer, a heat sealing layer, a paper substrate and a heat sealing layer from one side close to the content;
the release layer comprises, by weight, 78-94% of aqueous acrylic emulsion, 5-20% of acrylic acid grafted branched polyethylene wax, 0.3-0.8% of flatting agent, 0.3-0.6% of emulsifying agent and 0.4-0.6% of defoaming agent;
the preparation method of the acrylic acid grafted branched polyethylene wax comprises the following steps:
adding branched polyethylene wax into an organic solvent, and heating and melting to obtain a branched polyethylene wax solution;
adding an acrylic acid monomer and an initiator into an organic solvent to obtain an acrylic acid solution;
and (3) dropwise adding the acrylic acid solution into the branched polyethylene wax solution for reaction, adding the reaction product into ethanol, stirring, filtering, drying and purifying to obtain the acrylic acid grafted branched polyethylene wax.
By adopting the technical scheme, the branched polyethylene wax is a polyethylene wax with a branched structure, has very good performance, is nontoxic, tasteless and corrosion-free, and has better chemical stability. The acrylic acid monomer is adopted to carry out graft modification on the branched polyethylene wax, so that the water solubility and the emulsibility of the branched polyethylene wax are improved, and the acrylic acid grafted branched polyethylene wax is applied to the packaging paper for sanitary products, thereby playing roles in lubrication and viscosity reduction. And the functional heat-sealing layer is mixed with the aqueous acrylic emulsion to form a main matrix of the functional heat-sealing layer, so that the complete heat sealing of the contents can be realized, and the moisture-proof and dust-proof performances of the packaging paper are improved.
Preferably, in the preparation method of the acrylic acid grafted branched polyethylene wax, the amount of the acrylic acid monomer accounts for 4-8% of the amount of the branched polyethylene wax by weight percent.
By adopting the technical scheme, the lubrication and viscosity reduction effects of the acrylic acid grafted branched polyethylene wax are further improved through limiting the dosage of the acrylic acid monomer, so that the prepared packaging paper has better heat sealing performance and dampproof and dustproof functions.
Preferably, in the preparation method of the acrylic acid grafted branched polyethylene wax, the amount of the acrylic acid monomer accounts for 6 percent of the amount of the branched polyethylene wax in percentage by weight.
By adopting the technical scheme, when the acrylic acid monomer and the branched polyethylene wax are modified according to the weight ratio of 6:100, the obtained acrylic acid grafted branched polyethylene wax has better performances, so that the heat sealing performance and the moisture and dust resistance of the prepared packaging paper are improved.
Preferably, in the preparation method of the acrylic acid grafted branched polyethylene wax, the amount of the initiator is 0.2 to 0.4 percent of the amount of the branched polyethylene wax in percentage by weight.
By adopting the technical scheme, the amount of the initiator can obviously influence the grafting of the acrylic acid monomer and the branched polyethylene wax, and when the amount of the initiator is in the range, the obtained acrylic acid grafted branched polyethylene wax has better performance.
Preferably, the initiator is t-butyl hydroperoxide.
Preferably, the heat sealing layer comprises, by weight, 99-99.5% of an aqueous acrylic emulsion, 0.3-0.5% of a leveling agent and 0.2-0.5% of a defoaming agent.
Through adopting above-mentioned technical scheme, the heat-seal layer that above-mentioned raw materials prepared has better high temperature resistance and waterproof performance, can satisfy sanitary articles packing's needs, replaces the PE film to pack sanitary articles, and not only production step is simple, and helps the environmental protection.
In a second aspect, the present application provides a process for producing a packaging paper for sanitary products, which adopts the following technical scheme: the production process of the packaging paper for the sanitary products comprises the following steps:
and (3) coating a heat seal layer: mixing the raw materials of the heat sealing layer to obtain heat sealing layer coating, coating the heat sealing layer coating on two sides of the paper substrate in a full-scale manner, and drying to obtain a heat sealing layer;
coating a release layer: and mixing the release layer raw materials to obtain release layer coating, locally coating the release layer coating on the surface of the heat sealing layer close to one side of the content, and drying to obtain the release layer.
By adopting the technical scheme, the coating process is simple, the conditions are easy to control, and large-scale industrial production can be realized.
Preferably, the coating step of the heat-sealing layer is as follows: and mixing the raw materials of the heat-sealing layer to obtain heat-sealing layer coating, coating the heat-sealing layer coating on two sides of the paper substrate, drying, then coating the heat-sealing layer coating on the surface of the heat-sealing layer in a full-plate manner, and drying to obtain the heat-sealing layer coating.
By adopting the technical scheme, the heat sealing performance of the packaging paper can be further improved, so that the moisture and dust resistance of the packaging paper to contents is improved.
Preferably, each layer of the heat-sealing layer has a coating dry weight of 0.3-1g/m 2 。
Preferably, the release layer has a coating dry weight of 0.5-1.2g/m 2 。
In summary, the present application has the following beneficial effects:
1. the paper substrate is used as the main packaging substrate to replace a PE film which is difficult to degrade to package the sanitary product, so that the environment is protected, the production process is relatively simple, and the harmful solvent is not volatilized in the process, so that the harm to the health of production personnel is avoided;
2. in the application, the branched polyethylene wax is modified by adopting the acrylic acid monomer and is matched with the water-based acrylic acid emulsion for use, so that the heat sealing performance of the packaging paper is improved, the sanitary articles can be effectively sealed, and the dustproof and moistureproof performances are improved;
3. the method has simple process and easily controlled conditions, and can be used for industrialized mass production.
Drawings
FIG. 1 is a schematic view showing the structure of each layer of waterproof wrapping paper in examples 1 to 12 of the present application;
FIG. 2 is a schematic view showing the structure of each layer of the waterproof wrapping paper in examples 13 to 17 of the present application.
Reference numerals: 1. a release layer; 2. a heat-sealing layer; 3. a paper substrate.
Detailed Description
The present application is described in further detail below with reference to the drawings and examples.
The raw materials used in the examples of the present application are commercially available except for the following specific descriptions:
the branched polyethylene wax has an average relative molecular weight of 4400, technical grade;
the acrylic monomer may be an acrylic or methacrylic monomer, and is not particularly limited, and the following examples are exemplified by methyl acrylate, which is derived from aledine.
Performance test
Test one: heat sealability test
The packaging paper is heat-sealed for 4s at 180 ℃ and 0.4MPa, cooled and cut into strips with the width of 25cm, the strip is tested for stripping force on a tensile machine, stripping and stretching are measured, each group is repeatedly tested for 5 times, and the test results are averaged.
And (2) testing II: release test
After the wrapping paper is attached to the tesa7475, the wrapping paper is rolled for 4 times in the same direction by using a 2kg roller, pressed for 10min by using a 10kg pressing block, taken down and kept stand for 5min, and the peeling force test is carried out by using a tensile machine, and the test results are repeated for 5 times in each group, and the average value is obtained.
And (3) test III: weather resistance test
After the wrapping paper is attached to the tesa7475, the wrapping paper is rolled in the same direction for 4 times by using a 2kg roller, the temperature of the oven is controlled to be 50 ℃, after the 10kg pressing block is pressed for 20 hours in the oven, the pressing block is taken down and kept stand for 4 hours in the environment of 23 ℃, the peeling force test is carried out by a pulling machine, the test is repeated for 5 times in each group, and the average value of the test results is obtained.
Preparation of acrylic grafted branched polyethylene wax
Preparation example 1
An acrylic grafted branched polyethylene wax, which is prepared by the steps of:
1000g of branched polyethylene wax is added into absolute ethyl alcohol which is an organic solvent and has the volume which is 2 times that of the branched polyethylene wax, and the mixture is heated to 130 ℃ to be melted, so as to obtain a branched polyethylene wax solution;
adding 30g of acrylic acid monomer and 1g of initiator benzoyl peroxide into absolute ethyl alcohol which is an organic solvent and has the volume which is 5 times that of the acrylic acid monomer to obtain an acrylic acid solution;
and (3) controlling the temperature to 140 ℃, dripping an acrylic acid solution into a branched polyethylene wax solution for reaction, preserving heat for reaction for 8 hours after dripping, adding a reaction product into ethanol with the volume which is 5 times that of the reaction product, stirring, filtering, drying, and performing Soxhlet extraction on the dried product by taking ethanol as a solvent for 8 hours to obtain the acrylic acid grafted branched polyethylene wax.
PREPARATION EXAMPLES 2 to 5
An acrylic graft branched polyethylene wax differs from that of preparation example 1 in the amount of acrylic monomer used, as shown in the following table.
Preparation examples 6 to 9
An acrylic grafted branched polyethylene wax differs from preparation example 3 in the amount of initiator used, as shown in the following table.
Preparation example 10
An acrylic grafted branched polyethylene wax differs from preparation 7 in that the initiator is t-butyl hydroperoxide.
Examples
Example 1
As shown in fig. 1, the packaging paper for sanitary products sequentially comprises a release layer 1, a heat sealing layer 2, a paper base material 3 and a heat sealing layer 2 from one side close to the content;
wherein the paper substrate 3 is 30g/m 2 Is a white coated paper.
The heat sealing layer 2 is formed by coating the surface of the paper substrate 3 with the heat sealing layer raw material. The raw materials of the heat sealing layer are composed of aqueous acrylic emulsion and auxiliary agents, the weight percentage of the aqueous acrylic emulsion is not less than 95%, the solid content of the aqueous acrylic emulsion is 40-50%, and the heat sealing layer is not particularly limited. In carrying out the present application, the inventors found that the preparation of the waterproof wrapping paper in the above-described range is not significantly different in properties of the resulting wrapping paper, but is relatively preferable when the heat-seal layer material is composed of 99 to 99.5% aqueous acrylic emulsion, 0.3 to 0.5% leveling agent, and 0.2 to 0.5% defoaming agent. This example illustrates only one example, namely a heat seal layer material consisting of 99.3g of an aqueous acrylic emulsion having a solids content of 40%, 0.4g of a silicone-based leveling agent, and 0.3g of a silicone-based antifoaming agent.
The release layer 1 is formed by coating release layer raw materials on the surface of the heat sealing layer 2 near the content side. The release layer raw material consists of 78g of aqueous acrylic emulsion with the solid content of 40%, 20g of acrylic grafted branched polyethylene wax prepared in preparation example 1, 0.8g of organosilicon leveling agent, 0.6g of emulsifier sodium dodecyl sulfate and 0.6g of organosilicon defoamer.
The preparation method of the wrapping paper for the sanitary products in the embodiment comprises the following steps:
and (3) coating a heat seal layer: mixing the above materials to obtain heat-seal layer coating, coating the heat-seal layer coating on both sides of paper substrate 3 at a coating speed of 350m/min, and oven drying at 80deg.C to obtain heat-seal layer 2 with a coating dry weight of 3.5g/m 2 ；
Coating a release layer: mixing release layer raw materials to obtain release layer coating, locally coating release layer coating on the surface of heat sealing layer 2 near one side of content at a coating speed of 350m/min, and oven drying at 80deg.C to obtain release layer 1 with a coating dry weight of 2g/m 2 。
Examples 2 to 3
As shown in fig. 1, the wrapping paper for sanitary products comprises a release layer 1, a heat seal layer 2, a paper base material 3 and a heat seal layer 2 in this order from the side close to the content.
The difference from example 1 is that the amount of the raw material for release layer 1 is different, as shown in the following table.
Raw material usage of release layer in examples 1-3:
comparative example 1
A wrapper differs from example 1 in that an equivalent amount of branched polyethylene wax is used instead of the acrylic grafted branched polyethylene wax.
Performance test results for examples 1-3 and comparative example 1:
as can be seen from the data in the table, the packaging paper for sanitary products, which is prepared in the embodiments 1-3 of the application, has good heat sealing performance, and can realize complete sealing of the content of the sanitary products, so that the packaging paper has good waterproof and dustproof performances, and can meet the application of the packaging field of the sanitary products. In comparative example 1, however, the heat sealing property, release property and weather resistance of the obtained wrapping paper were reduced to different degrees by using the branched polyethylene wax instead of the acrylic acid-grafted branched polyethylene wax.
Examples 4 to 7
As shown in fig. 1, the wrapping paper for sanitary products comprises a release layer 1, a heat seal layer 2, a paper base material 3 and a heat seal layer 2 in this order from the side close to the content.
The difference from example 2 is that the acrylic graft branched polyethylene wax was used in the raw material of release layer 1, as shown in the following table.
Use of the acrylic graft branched polyethylene wax of examples 2 and 4-7:
as can be seen from the data in the table above, the waterproof wrapping paper prepared by the acrylic acid grafted branched polyethylene wax prepared in preparation example 3 has better heat sealability, release property and weather resistance, namely, when the acrylic acid monomer is used for grafting modification of the branched polyethylene wax, the modification effect is best when the acrylic acid monomer is used for accounting for 6% of the amount of the branched polyethylene wax.
Examples 8 to 11
As shown in fig. 1, the wrapping paper for sanitary products comprises a release layer 1, a heat seal layer 2, a paper base material 3 and a heat seal layer 2 in this order from the side close to the content.
The difference from example 5 is that the acrylic graft branched polyethylene wax was used in the raw material of release layer 1, as shown in the following table.
Use of the acrylic grafted branched polyethylene wax of examples 5 and 8-11:
as can be seen from the data in the table above, the waterproof wrapping paper prepared by the acrylic acid grafted branched polyethylene wax prepared in preparation example 7 has better heat sealability, release property and weather resistance, namely, the optimal usage amount of the initiator in the grafting modification process of the branched polyethylene wax is 0.3% of the usage amount of the branched polyethylene wax.
Example 12
As shown in fig. 1, the wrapping paper for sanitary products comprises a release layer 1, a heat seal layer 2, a paper base material 3 and a heat seal layer 2 in this order from the side close to the content.
The difference from example 9 is that the acrylic graft branched polyethylene wax was used in the raw material of release layer 1, as shown in the following table.
Use of the acrylic grafted branched polyethylene wax of example 9 and example 12:
as can be seen from the data in the table above, in the process of carrying out acrylic acid grafting modification on branched polyethylene wax, the preferred choice of the initiator is tert-butyl hydroperoxide, and various properties of the finally obtained waterproof packaging paper can be obviously improved.
Example 13
A wrapping paper for sanitary products is different from example 12 in that, as shown in fig. 2, both sides of a paper base material 3 are repeatedly coated with 2 heat seal layers 2.
The preparation method of the wrapping paper for the sanitary products in the embodiment comprises the following steps:
and (3) coating a heat seal layer: mixing the raw materials of the heat-sealing layer to obtain a heat-sealing layer coating, locally coating the heat-sealing layer coating on the surface of the paper substrate 3 at the coating speed of 350m/min, drying at 80 ℃ to form a first heat-sealing layer 2, then fully coating the surface of the first heat-sealing layer 2 with the raw materials of the heat-sealing layer, drying at the coating speed of 350m/min at 80 ℃ to form a second heat-sealing layer 2, wherein the coating dry weight of each heat-sealing layer 2 is 1.5g/m 2 ；
Coating a release layer: mixing release layer raw materials to obtain release layer coating, coating release layer coating on the surface of heat sealing layer 2 near one side of content at a coating speed of 350m/min, and oven drying at 80deg.C to obtain release layer 1, wherein the coating dry weight of release layer 1 isIs 2g/m 2 。
Example 14
A packaging paper for sanitary products has the structure shown in figure 2. This example is different from example 13 in that the dry coating weight of each heat-seal layer 2 was 1g/m 2 。
Example 15
A packaging paper for sanitary products has the structure shown in figure 2. This example is different from example 13 in that the first heat-seal layer 2 has a coating dry weight of 1g/m 2 The second heat-sealing layer 2 had a coating dry weight of 0.3g/m 2 。
Example 16
A packaging paper for sanitary products has the structure shown in figure 2. This example is different from example 13 in that the release layer 1 has a coating dry weight of 0.5g/m 2 。
Example 17
A packaging paper for sanitary products has the structure shown in figure 2. This example is different from example 13 in that the release layer 1 has a coating dry weight of 1.2g/m 2 。
Performance test results for examples 12-17:
as is clear from the above table data, the waterproof wrapping papers in examples 13 to 17 all adopt a two-layer heat-sealing layer structure, and the heat sealability of the finally obtained waterproof wrapping papers is obviously improved.
The present embodiment is merely illustrative of the present application and is not intended to be limiting, and those skilled in the art, after having read the present specification, may make modifications to the present embodiment without creative contribution as required, but is protected by patent laws within the scope of the claims of the present application.
Claims (9)
1. A packaging paper for sanitary products is characterized by sequentially comprising a release layer, a heat sealing layer, a paper substrate and a heat sealing layer from one side close to the content;
the release layer is prepared from the following raw materials by weight percent, namely 78-94% of aqueous acrylic emulsion, 5-20% of acrylic acid grafted branched polyethylene wax, 0.3-0.8% of flatting agent, 0.3-0.6% of emulsifying agent and 0.4-0.6% of defoaming agent;
the preparation method of the acrylic acid grafted branched polyethylene wax comprises the following steps:
adding branched polyethylene wax into an organic solvent, and heating and melting to obtain a branched polyethylene wax solution;
adding an acrylic acid monomer and an initiator into an organic solvent to obtain an acrylic acid solution;
dripping acrylic acid solution into branched polyethylene wax solution for reaction, adding the reaction product into ethanol, stirring, filtering, drying and purifying to obtain acrylic acid grafted branched polyethylene wax;
the heat sealing layer is prepared from the raw materials of 99-99.5% of aqueous acrylic emulsion, 0.3-0.5% of flatting agent and 0.2-0.5% of defoaming agent according to weight percentage.
2. The wrapping paper for sanitary products according to claim 1, wherein the amount of acrylic acid monomer used in the preparation method of the acrylic acid grafted branched polyethylene wax is 4-8% by weight of the amount of branched polyethylene wax.
3. The wrapping paper for sanitary products according to claim 2, wherein the acrylic acid grafted branched polyethylene wax is prepared by using an amount of acrylic acid monomer of 6% by weight of the amount of branched polyethylene wax.
4. The wrapper for sanitary products according to claim 1, wherein the amount of the initiator used in the preparation of the acrylic acid grafted branched polyethylene wax is 0.2 to 0.4% by weight of the amount of the branched polyethylene wax.
5. The wrapper for a hygiene article of claim 1, wherein the initiator is t-butyl hydroperoxide.
6. A process for producing a wrapping paper for sanitary products according to any one of claims 1 to 5, characterized by comprising the steps of:
and (3) coating a heat seal layer: mixing the raw materials of the heat sealing layer to obtain heat sealing layer coating, coating the heat sealing layer coating on two sides of the paper substrate in a full-scale manner, and drying to obtain a heat sealing layer;
coating a release layer: and mixing the release layer raw materials to obtain release layer coating, locally coating the release layer coating on the surface of the heat sealing layer close to one side of the content, and drying to obtain the release layer.
7. The process for producing a wrapping paper for sanitary products according to claim 6, wherein said heat-seal layer is applied by the steps of: and mixing the raw materials of the heat-sealing layer to obtain heat-sealing layer coating, coating the heat-sealing layer coating on two sides of the paper substrate, drying, then coating the heat-sealing layer coating on the surface of the heat-sealing layer in a full-plate manner, and drying to obtain the heat-sealing layer coating.
8. The process for producing a wrapping paper for sanitary products according to claim 7, wherein each of said heat-seal layers has a dry coating weight of 0.3 to 1g/m 2 。
9. The process for producing a wrapping paper for sanitary products according to claim 7, wherein the release layer has a dry coating weight of 0.5 to 1.2g/m 2 。
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210210707.XA CN114657816B (en) | 2022-03-03 | 2022-03-03 | Wrapping paper for sanitary products and production process thereof |
| PCT/CN2023/078286 WO2023165432A1 (en) | 2022-03-03 | 2023-02-25 | Packaging paper for sanitary products and production process therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210210707.XA CN114657816B (en) | 2022-03-03 | 2022-03-03 | Wrapping paper for sanitary products and production process thereof |
Publications (2)
| Publication Number | Publication Date |
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| CN114657816A CN114657816A (en) | 2022-06-24 |
| CN114657816B true CN114657816B (en) | 2023-05-09 |
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| CN202210210707.XA Active CN114657816B (en) | 2022-03-03 | 2022-03-03 | Wrapping paper for sanitary products and production process thereof |
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| WO (1) | WO2023165432A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114657816B (en) * | 2022-03-03 | 2023-05-09 | 上海紫华薄膜科技有限公司 | Wrapping paper for sanitary products and production process thereof |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000345097A (en) * | 1999-06-04 | 2000-12-12 | Mitsui Chemicals Inc | Polyolefin elastomer-based aqueous coating agent |
| CN102471655B (en) * | 2009-07-31 | 2015-02-11 | 汉高美国知识产权有限责任公司 | Low application temperature hot melt adhesive |
| CN102167783A (en) * | 2011-03-09 | 2011-08-31 | 张燕妮 | Method for preparing functionalized polyethylene wax |
| BR112019022521B1 (en) * | 2017-04-28 | 2023-04-25 | Sun Chemical Corporation | THERMAL SEALABLE BARRIER COATING |
| CN111945477B (en) * | 2020-08-14 | 2022-07-05 | 上海紫华薄膜科技有限公司 | Release heat-sealing packaging paper and manufacturing method thereof |
| CN113430861A (en) * | 2021-07-31 | 2021-09-24 | 广东博海化工科技有限公司 | Waterproof water-based heat-sealing coating applied to paper food packaging material and preparation method and application method thereof |
| CN114657816B (en) * | 2022-03-03 | 2023-05-09 | 上海紫华薄膜科技有限公司 | Wrapping paper for sanitary products and production process thereof |
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| CN114657816A (en) | 2022-06-24 |
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