PVC / PVDC / PE composite film and packaging bottle
By designing a PVC/PVDC/PE composite film, where the PE layer comes in contact with the packaging, the PVDC layer provides barrier properties, and the PVC layer provides mechanical strength, the problem that the composite film cannot be suitable for liquid packaging in the prior art is solved, and versatility and safety for liquid and solid packaging are achieved.
Patent Information
- Application Number
- CN202421561589.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-03
- Publication Date
- 2025-06-13
- Estimated Expiration
- 2034-07-03
AI Technical Summary
The composite film of existing packaging bottles is only suitable for solid packaging and cannot be suitable for liquid packaging. Especially acidic liquids, such as e-liquid, will cause problems with the dissolution of PVDC materials.
A PVC/PVDC/PE composite film is designed, in which the PE layer is in contact with the packaging as an inner layer, the PVC layer is provided with mechanical strength and wear resistance as an outer layer, and the PVDC layer is provided with barrier properties as an intermediate layer.
The composite film can be used in both liquid and solid packaging. The PE layer contacts the packaging without reacting. The PVDC layer provides good barrier properties to prevent liquid from passing through. The PVC layer provides mechanical strength and cost-effectiveness.
Smart Images
Figure CN222972951U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of composite films, and particularly relates to a PVC / PVDC / PE composite film and a packaging bottle. Background Art
[0002] The original packaging bottles are often composed of PVC / PE / PVDC composite films, with the inner layer being PVDC and directly contacting the packaged goods. Such packaging bottles are only suitable for solid packaging because when the PVDC material contacts liquids (especially slightly acidic liquids, such as e-liquid), there will be dissolved substances. Therefore, it is necessary to design a composite film that is suitable for both liquid packaging and solid packaging. Content of the Utility Model
[0003] The utility model aims at the above problems existing in the prior art and provides a PVC / PVDC / PE composite film and a packaging bottle that are suitable for both liquid packaging and solid packaging.
[0004] The utility model can be realized by the following technical solutions:
[0005] A PVC / PVDC / PE composite film, comprising:
[0006] A PVC layer, a PVDC layer, and a PE layer that are connected to each other. The PVC layer is disposed on the outer layer of the PVDC layer, and the PE layer is disposed on the inner layer of the PVDC layer and is used to contact the packaged goods. Among them,
[0007] The thickness of the PE layer is 0.05 mm;
[0008] The density of the PE layer is between 0.91 - 0.93 g / cm 3 ;
[0009] The coating amount of the PVDC layer is between 40 - 180 g / cm 2 ;
[0010] The crystalline density of the PVDC layer is 1.96 g / cm 3 ;
[0011] As a further improvement of the utility model, the thickness of the PVC layer is between 0.2 - 0.4 mm.
[0012] As a further improvement of the utility model, the density of the PVC layer is between 1.35 - 1.37 g / cm 3 ;
[0013] As a further improvement of the utility model, the PVC layer and the PVDC layer are bonded by a composite adhesive.
[0014] As a further improvement of the present utility model, the PE layer and the PVDC layer are bonded by a composite adhesive.
[0015] A packaging bottle, comprising:
[0016] Two sets of the above-mentioned PVC / PVDC / PE composite films;
[0017] The PE layers of the two sets of PVC / PVDC / PE composite films are bonded and formed into a bottle-like structure after blow molding.
[0018] Compared with the prior art, the present utility model has the following beneficial effects:
[0019] 1. By directly contacting the packaging object through the PE layer, it can be applied to the packaging of liquids, and at the same time meet the needs of solid packaging, with universality.
[0020] 2. The PVDC layer provides good barrier properties. Even when the PE layer is relatively thin, the liquid will not penetrate through the PE layer to contact the PVC and cause the generation of precipitates, improving the safety of packaging;
[0021] 3. The PVC layer, as the outer layer, provides good mechanical strength, wear resistance and cost-effectiveness. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Figure 1 is a cross-sectional view of the PVC / PVDC / PE composite film of the present utility model;
[0023] Figure 2 is a cross-sectional view of the packaging bottle of the present utility model.
[0024] In the figure, 100, PVC layer; 200, PVDC layer; 300, PE layer. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0025] The following are specific embodiments of the present utility model and in combination with the accompanying drawings, the technical methods of the present utility model are further described, but the present utility model is not limited to these embodiments.
[0026] As Figure 1 shown, the present utility model provides a PVC / PVDC / PE composite film, comprising:
[0027] The mutually connected PVC layer 100 (polyvinyl chloride layer), PVDC layer 200 (polyvinylidene chloride layer) and PE layer 300 (polyethylene layer), wherein,
[0028] The PVC layer 100 is arranged on the outer layer of the PVDC layer 200, and the PE layer 300 is arranged on the inner layer of the PVDC layer 200.
[0029] It should be noted that the PE layer 300 is used for direct contact with the packaging. Since the PE material is inert and not prone to react with liquids and solids, it is suitable for packaging liquids and solids. Moreover, PE is also convenient for heat sealing to ensure the integrity and tightness of the packaging.
[0030] The PVDC layer 200 serves as the intermediate layer and is a key barrier material. It is characterized by extremely low gas permeability and moisture permeability, which can effectively prevent the penetration of oxygen, water vapor, and other gases, thereby extending the shelf life of the packaged contents. In addition, PVDC has excellent waterproof performance, further enhancing the protective ability of the packaging.
[0031] The PVC layer 100 serves as the outer layer, providing good mechanical strength, abrasion resistance, and cost - effectiveness. It can protect the inner layer materials from physical damage and has a certain flame retardancy, suitable for making various shapes and sizes of packaging.
[0032] Preferably, the thickness of the PE layer 300 is 0.05 mm. This thickness of the PE inner layer is thin enough to ensure good heat - sealability and low cost. At the same time, the inert PE material can effectively avoid reacting with the contents and protect the product safety.
[0033] Preferably, the density of the PE layer 300 is between 0.91 - 0.93 g / cm3. This density range belongs to low - density polyethylene (LDPE) or linear low - density polyethylene (LLDPE). Such PE has better flexibility, low - temperature resistance, and heat - sealability, suitable for use as the inner layer to ensure good tightness and adaptability to the contents.
[0034] Preferably, the coating amount of the PVDC layer 200 is between 40 - 180 g / cm2. The coating amount within this range can significantly enhance the barrier performance of the composite film, especially the barrier to gases and water vapor, which is crucial for protecting products that are prone to oxidation or sensitive to humidity.
[0035] Preferably, the crystalline density of the PVDC layer 200 is 1.96 g / cm3. High - crystallinity PVDC means better barrier performance and material stability, which helps to maintain a constant internal environment of the packaging and is very beneficial for extending the shelf life.
[0036] Preferably, the thickness of the PVC layer 100 is between 0.2 - 0.4 mm. This thickness range ensures sufficient mechanical strength and physical protection performance while maintaining cost - effectiveness.
[0037] Preferably, the density of the PVC layer 100 is between 1.35 - 1.37 g / cm3. This density range can ensure its good physical properties, such as hardness and toughness.
[0038] Preferably, the PVC layer 100 and the PVDC layer 200, as well as the PE layer 300 and the PVDC layer 200, are bonded together by a composite adhesive.
[0039] As Figure 2 shown, a packaging bottle is also provided, which includes:
[0040] Two groups of the above-mentioned PVC / PVDC / PE composite films;
[0041] The PE layers 300 of the two groups of PVC / PVDC / PE composite films are bonded together and formed into a bottle-like structure after blow molding.
[0042] This packaging bottle directly contacts the packaging object through the PE layer 300, can be applicable to the packaging of liquids, and also meets the needs of solid packaging. At the same time, due to the good barrier property provided by the PVDC layer 200, even when the PE layer 300 is relatively thin, the liquid will not permeate through the PE layer 300 to contact the PVC and cause the generation of precipitates, thus improving the safety of the packaging.
[0043] The technical means disclosed in the solution of the present utility model are not limited to the technical means disclosed by the above technical means, but also include the technical solutions composed of any combination of the above technical features. The above is the specific implementation manner of the present utility model. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of the present utility model, several improvements and refinements can be made, and these improvements and refinements are also regarded as the protection scope of the present utility model.
[0044] It should be noted that all the directional indications (such as up, down, left, right, front, back...) in the embodiments of the present utility model are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the drawings). If this specific posture changes, then the directional indications will also change accordingly.
[0045] In addition, in the present utility model, the descriptions such as "first", "second", "one", etc. are only for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.
[0046] In the present utility model, unless otherwise clearly specified and defined, terms such as "connection" and "fixation" shall be understood in a broad sense. For example, "fixation" may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0047] In addition, the technical solutions between various embodiments of the present utility model can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.
Claims
1. A PVC / PVDC / PE composite film, characterized in that: include: A PVC layer, a PVDC layer and a PE layer connected to each other, wherein the PVC layer is arranged on the outer layer of the PVDC layer, and the PE layer is arranged on the inner layer of the PVDC layer and is used to contact with the packaging, wherein: The thickness of the PE layer is 0.05 mm; The density of the PE layer is 0.91-0.93 g / cm 3 between; The coating amount of the PVDC layer is 40-180 g / cm 2 between; The crystalline density of the PVDC layer is 1.96 g / cm 3 .
2. A PVC / PVDC / PE composite film according to claim 1, characterized in that: The thickness of the PVC layer is between 0.2-0.4 mm.
3. A PVC / PVDC / PE composite film according to claim 1, characterized in that: The density of the PVC layer is 1.35-1.37 g / cm 3 between.
4. A PVC / PVDC / PE composite film according to claim 1, characterized in that: The PVC layer and the PVDC layer are bonded together by a composite adhesive.
5. A PVC / PVDC / PE composite film according to claim 1, characterized in that: The PE layer and the PVDC layer are bonded together by a composite adhesive.
6. A packaging bottle, characterized in that: include: Two groups of PVC / PVDC / PE composite films as described in any one of claims 1 to 5 above; The PE layers of two groups of PVC / PVDC / PE composite films are bonded and blown to form a bottle-shaped structure.