Blister packaging structure and dish washing block packaging structure

Abstract

The invention belongs to the field of packaging materials. A novel blister package comprises a cover film and a bottom film, the bottom film can be automatically formed and packaged on line and has high barrier and easy-to-uncover performance, and the cover film has water-blocking and breathable functions. The dishwashing block packaging device can be used for packaging dishwashing blocks, the situation that after the dishwashing blocks are used for a long time, decomposed gas is exhausted, and consequently packaging expansion is caused is avoided, one dishwashing block is used at a time to form beads, convenience and rapidness are achieved, and the problem of moisture absorption caused by poor sealing can be solved.

Description

Technical Field

[0001] The present invention belongs to the field of packaging materials. Background Art

[0002] Most of the existing dishwashing tablets are packaged in self-standing bags made of aluminized packaging. The outer film of the dishwashing tablets is generally a water-soluble polyvinyl alcohol film, which is easy to absorb water and dissolve. If not sealed in time or not sealed properly after use, most of the unused dishwashing tablets will absorb moisture and become ineffective. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a new blister packaging, including a cover film and a bottom film. The bottom film can be automatically formed and packaged online. The bottom film has high barrier and easy-to-peel properties. The cover film has a water-blocking and breathable function, which can prevent the gas generated by the decomposition of the dishwashing tablets after a long time from being discharged and causing the packaging to expand. Moreover, using one dishwashing tablet per use is convenient and fast, and it can also solve the problem of moisture absorption caused by poor sealing.

[0004] The technical solutions adopted by the present invention to solve the above problems are as follows:

[0005] A blister packaging structure includes a cover film and a bottom film heat-sealed together. A hollow and closed cavity for placing items is formed in a partial area between the cover film and the bottom film.

[0006] The cover film is composed of a PET layer and a first PE layer from the outside to the inside;

[0007] The bottom film is composed of a PE-EVOH coextruded film layer and an APET layer from the inside to the outside. Among them, the PE-EVOH coextruded film layer is composed of a second PE layer, a PE and PB mixed layer, a third PE layer, a bonding resin layer, an EVOH layer, a second bonding resin layer, and a fourth PE layer from the inside to the outside;

[0008] The first PE layer of the cover film and the second PE layer of the bottom film are heat-sealed.

[0009] Further, in the PE and PB mixed layer, the mass of PB accounts for 4.5-8% of the total mass of the mixed layer.

[0010] Further, the thickness of the first PE layer of the cover film is 50-140 μm.

[0011] Further, the thickness of the EVOH layer of the bottom film is 3 μm.

[0012] Further, the thickness of the APET of the bottom film is 300-500 μm.

[0013] Further, the thickness of the PE-EVOH coextruded film layer of the bottom film is 50 μm.

[0014] Furthermore, the fourth PE layer is a layer of PE film, or may be formed by co-extrusion of two or more PE films.

[0015] In the blister packaging structure of the present invention, the bottom film can be automatically formed and packaged online, wherein APET is polyethylene terephthalate, which plays a role in thermoforming. PE-EVOH has good water and oxygen barrier properties. In the PE and PB mixed layer, since PB (polybutylene) and PE are incompatible, a small amount (4.5%-8%) of PB forms an "island structure" in PE, which can well control the easy-peel strength. After heat-sealing with the heat-sealing layer PE of the cover film, the easy-peel force can be controlled to 8-22N / 15mm. Therefore, the bottom film has high barrier and easy-peel properties.

[0016] The cover film of the present invention has a crystalline molecular structure of PE, which makes it have good water-blocking performance, and the non-crystalline part allows gas to pass through, so that the cover film has both water-blocking and oxygen-permeable effects.

[0017] Furthermore, there are multiple cavities distributed in a matrix shape.

[0018] The blister packaging structure of the present invention can be used to package dishwashing blocks. A dishwashing block is placed in each blister cavity. Each time a blister is opened, the dishwashing block is put into the dishwasher for use, which is convenient and quick. Since the bottom film has high barrier and easy-to-open properties, and the cover film has water-blocking and air-permeable functions, the problem of many dishwashing blocks being placed in a large package and repeatedly opening the large package to cause the dishwashing blocks to absorb moisture is avoided. In addition, the multi-layer structure design of the present invention has good water-blocking and air-permeable properties, which prevents the dishwashing blocks from being decomposed for a long time and then discharging gas to cause the package to swell. DETAILED DESCRIPTION

[0019] The features and performance of the present invention are further described in detail below in conjunction with the embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments, and are not limitations of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] Unless otherwise specified, the test materials, reagents, methods and equipment used in the following examples are conventional test materials, reagents, methods and equipment in the technical field; unless otherwise specified, the test materials and reagents used in the following examples can be obtained from commercial channels.

[0021] Example 1

[0022] A dishwashing block blister packaging structure comprises a cover film and a bottom film which are heat-sealed as one, wherein a part of the area between the cover film and the bottom film forms a hollow cavity which can hold items and is closed on all sides for holding the dishwashing blocks.

[0023] Among them, the cover film from the outside to the inside is a PET layer and a first PE layer. The PET layer is a printing layer, printing the patterns required for commodity sales, with a thickness of 12 μm, and the first PE layer has a thickness of 50 μm.

[0024] Among them, the bottom film from the inside to the outside is a PE-EVOH coextruded film layer and an APET layer in sequence. Among them, the PE-EVOH coextruded film layer from the inside to the outside is a second PE layer, a PE and PB mixed layer, a third PE layer, an adhesive resin layer, an EVOH layer, a second adhesive resin layer, a fourth PE layer, a fifth PE layer, and a sixth PE layer in sequence. In the PE and PB mixed layer, the mass of PB accounts for 5% of the total mass of the mixed layer. The EVOH layer has a thickness of 3 μm, the PE-EVOH coextruded film layer has a thickness of 50 μm, and the APET has a thickness of 300 μm.

[0025] The first PE layer of the cover film and the second PE layer of the bottom film are heat-sealed.

[0026] The opening force of the cover film of this blister packaging structure is tested, and the opening force is 12 N / 15 mm, which is easy to open.

[0027] Example 2

[0028] A blister packaging structure for dishwashing tablets, including a cover film and a bottom film heat-sealed together. A part of the area between the cover film and the bottom film forms a hollow and enclosed cavity for placing items, used for placing dishwashing tablets.

[0029] Among them, the cover film from the outside to the inside is a PET layer and a first PE layer. The PET layer is a printing layer, printing the patterns required for commodity sales, with a thickness of 12 μm, and the first PE layer has a thickness of 140 μm.

[0030] Among them, the bottom film from the inside to the outside is a PE-EVOH coextruded film layer and an APET layer in sequence. Among them, the PE-EVOH coextruded film layer from the inside to the outside is a second PE layer, a PE and PB mixed layer, a third PE layer, an adhesive resin layer, an EVOH layer, a second adhesive resin layer, a fourth PE layer, a fifth PE layer, and a sixth PE layer in sequence. In the PE and PB mixed layer, the mass of PB accounts for 4.5% of the total mass of the mixed layer. The EVOH layer has a thickness of 3 μm, the PE-EVOH coextruded film layer has a thickness of 50 μm, and the APET has a thickness of 500 μm.

[0031] The first PE layer of the cover film and the second PE layer of the bottom film are heat-sealed.

[0032] The opening force of the cover film of this blister packaging structure is tested, and the opening force is 16 N / 15 mm, which is easy to open.

[0033] Example 3

[0034] A blister packaging structure for dishwashing tablets, comprising a lid film and a bottom film heat-sealed together. A partially enclosed cavity for placing items is formed between the lid film and the bottom film, which is hollow and enclosed on all sides for placing dishwashing tablets.

[0035] Among them, the lid film consists of a PET layer and a first PE layer from the outside to the inside. The PET layer is a printing layer for printing patterns required for product sales, with a thickness of 12 μm, and the first PE layer has a thickness of 100 μm.

[0036] Among them, the bottom film consists of a PE-EVOH coextruded film layer and an APET layer from the inside to the outside. Among them, the PE-EVOH coextruded film layer consists of a second PE layer, a PE and PB mixed layer, a third PE layer, an adhesive resin layer, an EVOH layer, a second adhesive resin layer, a fourth PE layer, a fifth PE layer, and a sixth PE layer from the inside to the outside. In the PE and PB mixed layer, the mass of PB accounts for 5% of the total mass of the mixed layer. The EVOH layer has a thickness of 3 μm, the PE-EVOH coextruded film layer has a thickness of 50 μm, and the APET has a thickness of 400 μm.

[0037] The first PE layer of the lid film and the second PE layer of the bottom film are heat-sealed.

[0038] The opening force of the lid film of this blister packaging structure is tested, and the opening force is 14 N / 15 mm, which is easy to open.

[0039] The relevant technical indicators of the lid film, bottom film, or dishwashing tablet blister packaging structure of the above three embodiments are detected, and the test methods and test results are shown in the following table:

[0040]

[0041] It can be seen from the above data that the bottom film has good barrier properties, while the lid film has good air permeability, so that the gas generated by the dishwashing tablets due to water absorption can be discharged without causing the packaging to expand, and it has a good product display effect.

[0042] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solutions of the present invention, and these simple modifications all fall within the protection scope of the present invention.

[0043] In addition, it should be noted that in the various specific technical features described in the above specific embodiments, they can be combined in any suitable manner without conflict. To avoid unnecessary repetition, the present invention will not separately describe various possible combination methods.

[0044] In addition, any combination can be made among various different embodiments of the present invention, as long as it does not violate the idea of the present invention, and it should equally be regarded as the content disclosed by the present invention.

Claims

1. A blister packaging structure, comprising a cover film and a bottom film heat-sealed together. A partial area between the cover film and the bottom film forms a hollow and enclosed cavity for placing an article. The characteristics are as follows: The cover film is composed of a PET layer and a first PE layer from outside to inside; The bottom film is successively composed of a PE-EVOH co-extruded film layer and an APET layer from inside to outside. Among them, the PE-EVOH co-extruded film layer is successively composed of a second PE layer, a PE and PB mixed layer, a third PE layer, an adhesive resin layer, an EVOH layer, a second adhesive resin layer, and a fourth PE layer; The first PE layer of the cover film and the second PE layer of the bottom film are heat-sealed.

2. The blister packaging structure according to claim 1, wherein: In the PE and PB mixed layer, the mass of PB accounts for 4.5-8% of the total mass of the mixed layer.

3. The blister packaging structure according to claim 1, wherein: The thickness of the first PE layer of the cover film is 50-140 μm.

4. The blister packaging structure according to claim 1, characterized in that: The thickness of the EVOH layer of the bottom film is 3 μm.

5. The blister packaging structure according to claim 1, characterized in that: The thickness of the APET of the bottom film is 300-500 μm.

6. The blister packaging structure according to claim 1, wherein: The thickness of the PE-EVOH co-extruded film layer of the bottom film is 50 μm.

7. The blister packaging structure according to claim 1, wherein: The fourth PE layer is a single PE film or can be co-extruded by two or more PE films.

8. The blister packaging structure according to claim 1, characterized in that: There are multiple cavities, which are distributed in a matrix.

9. A dishwashing tablet packaging structure, characterized in that: Adopting the blister packaging structure according to any one of claims 1-6, the dishwashing tablets are placed inside the cavities of the blister packaging structure.

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