CN216033060U - Novel composite film - Google Patents
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- CN216033060U CN216033060U CN202122438333.0U CN202122438333U CN216033060U CN 216033060 U CN216033060 U CN 216033060U CN 202122438333 U CN202122438333 U CN 202122438333U CN 216033060 U CN216033060 U CN 216033060U
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- 239000002131 composite material Substances 0.000 title claims abstract description 36
- 239000010410 layer Substances 0.000 claims abstract description 122
- 239000000463 material Substances 0.000 claims abstract description 27
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- 229920001896 polybutyrate Polymers 0.000 claims abstract description 15
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- -1 polypropylene Polymers 0.000 claims description 7
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- 229920001328 Polyvinylidene chloride Polymers 0.000 claims description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 3
- 238000003851 corona treatment Methods 0.000 claims description 3
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- UVCJGUGAGLDPAA-UHFFFAOYSA-N ensulizole Chemical compound N1C2=CC(S(=O)(=O)O)=CC=C2N=C1C1=CC=CC=C1 UVCJGUGAGLDPAA-UHFFFAOYSA-N 0.000 description 4
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Abstract
The utility model relates to the technical field of films, in particular to a novel composite film which comprises an outer layer, an inner layer and a framework layer, wherein the framework layer is positioned between the outer layer and the inner layer, and the outer layer and the inner layer are compounded through an adhesive layer; the outer layer and the inner layer are made of PBAT or PLA materials respectively, the PBAT or the PLA materials are different from each other, the framework layer is of a sheet structure with uniformly distributed honeycomb-shaped through holes, and a framework of an integrated structure is arranged between the through holes. The utility model is helpful to solve the problems of insufficient structural strength and easy deformation in the prior art.
Description
Technical Field
The utility model relates to the technical field of films, in particular to a novel composite film.
Background
With the continuous development of industry, high polymer materials are gradually applied to various fields, and the requirements of various fields on the performance of the high polymer materials are continuously improved. The composite film is one of important materials, is a high polymer material compounded by two or more layers of films made of different materials and is mainly used for packaging.
At present, with the push of environmental protection concept and plastic limit order, degradable packaging films are more and more popular in the market. Chinese utility model patent with publication number CN213861134U discloses a novel biodegradable composite film material, which comprises a PBAT layer, a PLA layer and an adhesive layer sandwiched between the PBAT layer and the PLA layer, wherein the PBAT layer, the adhesive layer and the PLA layer are combined together by a composite film-forming technique. Although the composite film material provided by the patent is environment-friendly, has good surface wetting tension, is temperature-resistant and heat-sealable, and meets the requirements of low-temperature freezing conditions and the like, the composite film material still has the defects that the composite film is general in structural strength, insufficient in tensile strength and easy to deform under the action of external force.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a novel composite film, which is beneficial to solving the problems of insufficient structural strength and easy deformation in the prior art.
In order to achieve the purpose, the utility model adopts the following technical scheme:
the novel composite film comprises an outer layer, an inner layer and a framework layer, wherein the framework layer is positioned between the outer layer and the inner layer, and the outer layer, the inner layer and the framework layer are compounded through an adhesive layer; the outer layer and the inner layer are made of PBAT or PLA materials respectively, the PBAT or the PLA materials are different from each other, the framework layer is of a sheet structure with uniformly distributed honeycomb-shaped through holes, and a framework of an integrated structure is arranged between the through holes.
Preferably, the skeleton layer is made of polypropylene.
Preferably, the thickness of the skeleton layer is smaller than the thickness of the outer layer and the inner layer.
Preferably, in a composite state, a cavity is formed in the through hole.
Preferably, in the composite state, the through-hole is filled with an adhesive.
Preferably, the outer surface of the outer layer is provided with an adhesion layer made by corona treatment.
Preferably, the outer layer and the inner layer are provided with an alumina coating.
Preferably, the outer layer and the inner layer are provided with a PVDC coating.
Compared with the prior art, the utility model at least comprises the following advantages:
according to the utility model, the outer layer and the inner layer are made of PBAT or PLA materials with a synergistic effect, so that the composite film has strong degradability, good surface wetting tension, temperature resistance and heat sealing, and can adapt to low-temperature freezing conditions, further, the framework layer is arranged between the outer layer and the inner layer, and through the structural design of the honeycomb framework, the overall structural strength is improved after the outer layer and the inner layer are connected, the honeycomb framework contributes to reducing the materials of the framework layer, even if the materials with low degradation speed are used, the occupation ratio is small, and the composite film conforms to the environmental protection concept; according to the utility model, through the honeycomb-shaped skeleton structure, when the adhesive is only coated on the skeleton, a cavity is formed in the through hole, and the cavity can play a role in communicating the inner layer with the outer layer, so that the composite film is more breathable; according to the utility model, through the structure of the honeycomb-shaped framework, when the adhesive is coated on the framework and filled in the through holes, the using amount of the adhesive can be increased, so that the composite effect of the inner layer and the outer layer is better, and the quality of the whole structure is better.
Drawings
FIG. 1 is a simplified structural diagram of a novel composite film according to an embodiment;
FIG. 2 is an exploded view of the structure of the novel composite film;
FIG. 3 is a schematic plan view of a carcass layer;
FIG. 4 is a schematic view of a composite structure of the novel composite film in another embodiment.
The figure is marked with: 1. an outer layer; 2. an inner layer; 3. a framework layer; 31. a through hole; 32. a framework; 4. a first adhesive layer; 5. a second adhesive layer.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the following detailed description is made with reference to the accompanying drawings and detailed description. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, but rather should be construed as broadly as the present invention is capable of modification in various respects, all without departing from the spirit and scope of the present invention.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the two elements or intervening elements may be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1 to 3, the present embodiment discloses a novel composite film, which comprises an outer layer 1 made of PBAT material, an inner layer 2 made of PLA material, and a skeleton layer 3 made of polypropylene material, wherein the skeleton layer 3 is located between the outer layer 1 and the inner layer 2, and the three layers are compounded with each other through an adhesive layer.
PBAT is a degradable material with good comprehensive performance, and can be a degradable film material produced by proportioning starch, BTAT, PBS, PBSA, PCL, inorganic powder, PLA polylactic acid and the like or adding an additive into a single material. Wherein PLA is derived from corn, sugarcane or cassava to extract glucose and synthesize polylactic acid as a biological organic material; BTAT, PBS, PBSA and PCL are derived from petroleum machine materials extracted from coal resources or refined from large oil, the thickness of the film material made of the raw materials is between 12UM and 200UM, PBAT is a semi-crystalline polymer, the crystallization temperature is usually around 110 ℃, the melting point is around 130 ℃, the density is between 1.18g/ml and 1.3g/ml, the BTAT, the PBS, the PBSA and the PCL have better ductility and elongation at break, and better heat resistance and impact resistance, so that the BTAT, the PBSA and the PCL have good heat sealability. In this embodiment, the outer layer 1 is made of PBAT material, and mainly utilizes its ductility, heat resistance and impact resistance.
The PLA is BOPLA (biaxially oriented polylactic acid) or modified PLA, the main raw material is lactic acid prepared by using starch raw materials extracted from natural crops such as renewable plant resources including corn, wheat, sugarcane and the like through a fermentation process, and the polylactic acid (PLA) is prepared through artificial chemical synthesis. By burying underground or composting, the garbage pile will be digested by microorganisms for a certain period of time (e.g. 1-2 months), and carbon dioxide and water are discharged. The film covering production is not heat-resistant, and the temperature is about 90 ℃. The PLA layer is applied to the composite material with the thickness of 10 UM-150 UM. In the embodiment, the inner layer 2 is made of PLA material, is compounded with the PBAT material of the outer layer 1 to form a film, has complementary performance, is prepared into a temperature-resistant heat-sealing material, and meets the requirements of low-temperature freezing and boiling conditions.
In order to further improve the structural strength of the product and enable the product not to deform easily, a framework layer 3 is arranged between the outer layer 1 and the inner layer 2, the framework layer 3 is of a sheet structure with uniformly distributed honeycomb-shaped through holes 31, and a framework 32 of an integrated net structure is arranged between the through holes 31. Because polypropylene is a semi-crystalline thermoplastic, the polypropylene has high impact resistance, high mechanical property, and resistance to various organic solvents and alkali corrosion. Therefore, the framework layer 3 is made of polypropylene materials, and can provide strong structural supporting force for the compounding of the outer layer 1 and the inner layer 2, so that the product after compounding is strong in integrity, and all the layers are connected firmly and reliably. In addition, the thickness of the framework layer 3 is smaller than that of the outer layer 1 and the inner layer 2, so that the proportion of the framework layer 3 in the whole structure is smaller, and the environment-friendly performance of the whole product is better on the basis of ensuring the structural strength.
Wherein, the outer layer 1, the inner layer 2 and the framework layer 3 are connected and compounded through an adhesive layer.
The PBAT film and the PLA film can be bonded into a whole through traditional dry compounding or solvent-free compounding. When the adhesive layer is used for functional packaging, the adhesive has heat resistance and cold resistance, can bear the temperature requirements of bag making, boiling and stewing, and can also bear the temperature requirements of low-temperature refrigeration or freezing preservation (has lower embrittlement temperature); the adhesive is nontoxic, odorless, good in fluidity and leveling property and good in adhesive force on used composite materials, and can bear the corrosion of contents and various media in the environment.
In this embodiment, the adhesive layer between the outer layer 1 and the carcass layer 3 is a first adhesive layer 4, and the adhesive layer between the inner layer 2 and the carcass layer 3 is a second adhesive layer 5. The first adhesive and the second adhesive may be the same or different materials according to actual needs.
The first adhesive layer 4 and the second adhesive layer 5 in this embodiment are specifically coated on the inner end face and the outer end face of the framework 32, and after the outer layer 1, the inner layer 2 and the framework layer 3 are compounded, the through holes 31 on the framework layer 3 form cavities, and the cavities can play a role in communicating the inner layer 1 with the outer layer 1, so that the composite film is more breathable.
In another embodiment, as shown in fig. 4, the first adhesive layer 4 and the second adhesive layer 5 are coated on the inner surface and the outer surface of the framework layer 3, including the inner area of the through hole 31, and after the outer layer 1, the inner layer 2 and the framework layer 3 are compounded, the through hole 31 on the framework layer 3 is filled with the first adhesive or/and the second adhesive, and this structure can increase the amount of the adhesive, so that the compounding effect of the inner layer 1 and the outer layer 1 is better, and the overall structure quality is better.
In other embodiments, in order to improve the post-printing adhesion, the outer surface of the outer layer 1 is provided with an adhesion layer made by corona treatment.
In other embodiments, to meet the application requirements of high barrier performance, an alumina coating or a PVDC coating may be provided on the outer layer 1 and the inner layer 2.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (8)
1. The novel composite film is characterized by comprising an outer layer (1), an inner layer (2) and a framework layer (3), wherein the framework layer (3) is positioned between the outer layer (1) and the inner layer (2), and the outer layer (1) and the inner layer (2) are compounded through an adhesive layer; wherein, outer (1) and inlayer (2) adopt PBAT or PLA material to make respectively, and both materials are different, skeleton layer (3) are the lamellar body structure of the cellular through-hole of equipartition (31), have skeleton (32) of integral type structure between each through-hole (31).
2. The novel composite film as claimed in claim 1, wherein the skeleton layer (3) is made of polypropylene.
3. A novel composite film according to claim 1 or 2, characterized in that the thickness of the skeleton layer (3) is smaller than the thickness of the outer layer (1) and the inner layer (2).
4. The novel composite film according to claim 1, wherein in the composite state, a cavity is formed in the through hole (31).
5. The novel composite film according to claim 1, wherein in the composite state, the through holes (31) are filled with an adhesive.
6. The novel composite film according to claim 1, characterized in that the outer surface of the outer layer (1) is provided with an adhesion layer made by corona treatment.
7. The novel composite film according to claim 1, wherein the outer layer (1) and the inner layer (2) are provided with an alumina coating.
8. The novel composite film according to claim 1, wherein the outer layer (1) and the inner layer (2) are provided with a PVDC coating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122438333.0U CN216033060U (en) | 2021-10-11 | 2021-10-11 | Novel composite film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122438333.0U CN216033060U (en) | 2021-10-11 | 2021-10-11 | Novel composite film |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216033060U true CN216033060U (en) | 2022-03-15 |
Family
ID=80548433
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122438333.0U Active CN216033060U (en) | 2021-10-11 | 2021-10-11 | Novel composite film |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216033060U (en) |
-
2021
- 2021-10-11 CN CN202122438333.0U patent/CN216033060U/en active Active
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Address after: 362122 No. 790, Xingxiu Road, Taiwan investment zone, Quanzhou City, Fujian Province Patentee after: Quanzhou Jiadeli Electronic Materials Co.,Ltd. Country or region after: China Address before: 790 Xingxiu Road, Taiwan business investment zone, Quanzhou, Fujian Patentee before: QUANZHOU JIADELI ELECTRONIC MATERIAL Co.,Ltd. Country or region before: China |