CN215662314U - Degradable sealing film - Google Patents
Degradable sealing film Download PDFInfo
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- CN215662314U CN215662314U CN202120675492.XU CN202120675492U CN215662314U CN 215662314 U CN215662314 U CN 215662314U CN 202120675492 U CN202120675492 U CN 202120675492U CN 215662314 U CN215662314 U CN 215662314U
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- sealing film
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- based adhesive
- polylactic acid
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W90/00—Enabling technologies or technologies with a potential or indirect contribution to greenhouse gas [GHG] emissions mitigation
- Y02W90/10—Bio-packaging, e.g. packing containers made from renewable resources or bio-plastics
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Abstract
The utility model relates to a degradable sealing film which has good degradation performance, good heat sealing performance and better tear resistance, and comprises a sealing film body, wherein the upper end surface of a polylactic acid film layer in the sealing film body is provided with an acrylic acid water-based adhesive layer, the upper end surface of the acrylic acid water-based adhesive layer is provided with a glassine paper layer, and the thickness of the polylactic acid film layer is 30-70 mu m. The advantages are that: firstly, the degradable sealing film has good degradation performance, good composite fastness and good heat sealability; and the degradable sealing film has better tear resistance.
Description
Technical Field
The utility model relates to a degradable sealing film which has good degradation performance, good heat sealability and good tear resistance, and belongs to the technical field of food packaging.
Background
CN 204801185U, entitled "high and low temperature resistant high barrier food packaging safety sealing film", includes PE layer, and is characterized by including blending modified polymer layer, the blending modified polymer layer is formed by HDPE layer and EVOH layer, and the HDPE layer and EVOH layer are polymerized into one body by blending technology, and the blending modified polymer layer is compounded on the PE layer by dry compounding machine. And an EVOH layer in the blending modified polymer layer is compounded on the PE layer by using a dry compounding machine. The thickness of the HDPE layer is 0.02-0.05mm, the thickness of the EVOH layer is 0.01-0.02mm, and the thickness of the PE layer is 0.10-0.15 mm. The disadvantages are that: the high-temperature-resistant and high-barrier food packaging safety sealing film has relatively poor degradation performance and is not beneficial to environmental protection.
SUMMERY OF THE UTILITY MODEL
The design purpose is as follows: in order to avoid the defects in the background technology, the degradable sealing film which has good degradation performance, good heat sealability and better tear resistance is designed.
The design scheme is as follows: the design purpose is realized.
1. The sealing film is characterized in that an acrylic acid water-based adhesive layer is arranged on the upper end face of a polylactic acid film layer in the sealing film body, a glassine paper layer is arranged on the upper end face of the acrylic acid water-based adhesive layer, and the thickness of the polylactic acid film layer is 30-70 mu m. The purpose of this design is: the sealing film body comprises the components of glassine and polylactic acid film, so that the sealing film is good in degradation performance and meets the current green environmental protection requirement; secondly, the glassine paper layer and the polylactic acid film layer are compounded through acrylic acid water-based adhesive, the compounding fastness is good, and the acrylic acid water-based adhesive meets the use requirement of a food packaging bag; thirdly, the thickness of the polylactic acid film layer is 30-70 μm, and the polylactic acid film with the thickness has better heat sealing property.
2. The basis weight of the glassine layer is 40 g/square meter to 60 g/square meter, which is the second technical characteristic of the utility model. The purpose of this design is: the quantification of the glassine layer is 40 g/square meter-60 g/square meter, and the composite of the quantified glassine layer and the polylactic acid film layer can improve the integral tear resistance of the sealing film and cannot influence the heat sealing effect of the polylactic acid film.
3. The quantitative determination of the acrylic acid water-based adhesive layer is 2.95 g/square meter-3.05 g/square meter, which is the third technical characteristic of the utility model. The purpose of this design is: the acrylic acid water-based adhesive layer has the quantitative content of 2.95 g/square meter-3.05 g/square meter, can ensure the bonding fastness of the glassine layer and the polylactic acid film layer, and simultaneously avoids the increase of the production cost of the sealing film caused by the excessive use of the acrylic acid water-based adhesive.
The technical scheme is as follows: the degradable sealing film comprises a sealing film body, wherein an acrylic acid water-based adhesive layer is arranged on the upper end face of a polylactic acid thin film layer in the sealing film body, a glassine paper layer is arranged on the upper end face of the acrylic acid water-based adhesive layer, and the thickness of the polylactic acid thin film layer is 30-70 mu m.
Compared with the prior art, the degradable sealing film has the advantages that the degradable sealing film is good in degradation performance, good in composite fastness and good in heat sealability; and the degradable sealing film has better tear resistance.
Drawings
Fig. 1 is a schematic sectional view of a degradable sealing film.
Detailed Description
Example 1: reference is made to figure 1. A degradable sealing film comprises a sealing film body 1, wherein an acrylic acid water-based adhesive layer 12 is arranged on the upper end face of a polylactic acid thin film layer 11 in the sealing film body 1, a glassine layer 13 is arranged on the upper end face of the acrylic acid water-based adhesive layer 12, and the thickness of the polylactic acid thin film layer 11 is 30-70 mu m. Preferably, the thickness of the polylactic acid film layer 11 is 50 μm.
The Grassin paper layer 13 has the quantitative content of 40 grams per square meter to 60 grams per square meter. Preferably, the gram-weight plastic paper layer 13 has a quantitative weight of 50g per square meter; the glassine paper of the utility model conforms to GB/T29282-2012; the glassine paper has the functions of high temperature resistance, moisture resistance, oil resistance and the like, and is generally used for packaging in the industries of food, medicine and the like. The quantitative amount of the acrylic acid water-based adhesive layer 12 is 2.95 g/square meter-3.05 g/square meter. Preferably, the acrylic water-based adhesive layer 12 has a basis weight of 3.00 g/square meter.
The polylactic acid film layer 11 is made of polylactic acid (PLA), the polylactic acid takes starch (such as corn, wheat, cassava, etc.) as the initial raw material, the starch forms glucose under the enzyme decomposition, the obtained glucose is fermented under the action of soft acid bacteria to form lactic acid, and the lactic acid is combined to obtain the biodegradable thermoplastic polyester, because the polylactic acid has the following advantages: has good biocompatibility, nontoxicity, good mechanical property and good processing property, and can be made into food packaging bags.
The waste products of polylactic acid are decomposed into carbon dioxide and water by light and biological action, and play an important role in eliminating white pollution, protecting environment and balancing natural ecology.
It is to be understood that: although the above embodiments have described the design idea of the present invention in more detail, these descriptions are only simple descriptions of the design idea of the present invention, and are not limitations of the design idea of the present invention, and any combination, addition, or modification without departing from the design idea of the present invention falls within the scope of the present invention.
Claims (6)
1. The utility model provides a degradable sealing film, includes sealing film body (1), characterized by: the sealing film is characterized in that an acrylic acid water-based adhesive layer (12) is arranged on the upper end face of a polylactic acid film layer (11) in the sealing film body (1), a glassine layer (13) is arranged on the upper end face of the acrylic acid water-based adhesive layer (12), and the thickness of the polylactic acid film layer (11) is 30-70 mu m.
2. The degradable sealing membrane of claim 1, wherein: the thickness of the polylactic acid film layer (11) is 50 μm.
3. The degradable sealing membrane of claim 1, wherein: the Grassin paper layer (13) has the quantitative content of 40 grams per square meter to 60 grams per square meter.
4. A degradable sealing membrane as claimed in claim 3, wherein: the gram-weight plastic paper layer (13) has the quantitative content of 50g per square meter.
5. The degradable sealing membrane of claim 1, wherein: the quantitative rate of the acrylic acid water-based adhesive layer (12) is 2.95 g/square meter-3.05 g/square meter.
6. The degradable sealing membrane of claim 1, wherein: the quantitative rate of the acrylic acid water-based adhesive layer (12) is 3.00 g/square meter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120675492.XU CN215662314U (en) | 2021-04-01 | 2021-04-01 | Degradable sealing film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120675492.XU CN215662314U (en) | 2021-04-01 | 2021-04-01 | Degradable sealing film |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215662314U true CN215662314U (en) | 2022-01-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120675492.XU Active CN215662314U (en) | 2021-04-01 | 2021-04-01 | Degradable sealing film |
Country Status (1)
| Country | Link |
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| CN (1) | CN215662314U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115895488A (en) * | 2022-12-28 | 2023-04-04 | 杭州德泓科技有限公司 | Aluminum-plastic sealing film for biodegradable packaging bottle |
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2021
- 2021-04-01 CN CN202120675492.XU patent/CN215662314U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115895488A (en) * | 2022-12-28 | 2023-04-04 | 杭州德泓科技有限公司 | Aluminum-plastic sealing film for biodegradable packaging bottle |
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