CN210362753U

CN210362753U - Packaging film material

Info

Publication number: CN210362753U
Application number: CN201921274359.2U
Authority: CN
Inventors: 孙国锦; 曾文明; 谢志岗; 陈瑾瑾; 戴业良
Original assignee: Zhejiang Goldstone Packing Co ltd
Current assignee: Zhejiang Goldstone Packing Co ltd
Priority date: 2019-08-07
Filing date: 2019-08-07
Publication date: 2020-04-21
Anticipated expiration: 2029-08-07

Abstract

The utility model relates to the field of packaging, in particular to a packaging film material, which comprises an inner film layer, a barrier layer and a surface printing layer which are arranged in sequence from inside to outside, the inner film layer is a Polyethylene (PE) layer, the barrier layer comprises a first coating, a middle layer and a second coating which are sequentially arranged, the first coating and the second coating are polyvinyl alcohol (PVA) coatings, the middle layer is a polyethylene terephthalate (PET) layer, the surface printing layer is a PET layer, the utility model prepares the packaging film material by arranging PET, PVA and PE according to a certain sequence and compounding, so that the packaging film material has higher barrier property, in addition, because PET, PVA and PE are transparent or semitransparent macromolecular material to can make the packaging film material that obtains of preparation have transparent characteristic, thereby more make things convenient for the user to observe the state of packing content.

Description

Packaging film material

Technical Field

The utility model relates to the field of packaging, concretely relates to packaging film material.

Background

With the progress of chemical technology, the trend of functional development of plastic packaging films is becoming more and more obvious, wherein a high-barrier plastic packaging film is one of the fastest-developing functional films at present, and a high-barrier film refers to a packaging film which can protect packaging contents, prevent pollutants and small molecular substances such as oxygen, water vapor, liquid, smell and the like from permeating, and simultaneously prevent the packaging contents from permeating.

The mask packaging bag is a packaging film used for packaging and storing mask liquid and mask paper, and as various nutritional ingredients exist in the mask liquid, if pollutants enter the mask packaging bag, the mask liquid is easy to deteriorate, so that the mask packaging bag is required to have higher barrier performance. The existing facial mask packaging bag is generally formed by compounding a biaxially oriented polypropylene (BOPP) film, an alumina-plated polyethylene terephthalate (alumina-plated PET) film and a Polyethylene (PE) film, and has poor barrier property.

Disclosure of Invention

Therefore, the to-be-solved technical problem of the utility model lies in overcoming the relatively poor defect of facial mask wrapping bag separation performance that is formed by biaxial stretching polypropylene film, aluminium oxide plated polyethylene terephthalate film and polyethylene film complex among the prior art to a packaging film material is provided.

In order to solve the technical problem, the utility model discloses a technical scheme does:

the utility model provides a packaging film material, includes interior rete, barrier layer and the surface printing layer that sets gradually from interior to exterior, interior rete is Polyethylene (PE) layer, the barrier layer is including the first coating, intermediate level and the second coating of laying in proper order, first coating with the second coating is polyvinyl alcohol (PVA) coating, the intermediate level is polyethylene glycol terephthalate (PET) layer, the surface printing layer is the PET layer.

Furthermore, adhesive layers are arranged between the inner film layer and the blocking layer and between the blocking layer and the surface printing layer.

Further, the adhesive layer is a polyurethane adhesive layer.

Further, the packaging film material further comprises a light extinction oil layer, and the light extinction oil layer is arranged on one side, opposite to the blocking layer, of the surface printing layer.

Further, the thickness of the surface printing layer is 7-20 μm.

Further, the thickness of the barrier layer is 12 μm.

Further, the thickness of the inner film layer is 30-100 μm.

The utility model discloses technical scheme has following advantage:

1. the utility model provides a packaging film material, through adopting the PET layer as the printing layer, the PET film has intensity height, the rigidity is good, it is transparent, characteristics such as glossiness height, it is colourless, tasteless, nontoxic, have stronger toughness, and its tensile strength is 3 times of PC membrane, nylon membrane, impact strength is 3-5 times of BOPP membrane, there are fabulous wearability, folding endurance, resistant pinhole nature and tear resistance etc. the thermal contraction nature is less, thereby can improve the heat sealability, separation nature and the adhesive force of printing of packaging film material, in addition, the water absorption rate of PET film is low, has better water proofness, so suitable packing food that the water content is high; the PET/PVA composite film is used as a barrier layer, wherein PVA has good oil resistance, solvent resistance and gas barrier property, and PVA films with good gas barrier property are arranged on two sides of PET with good barrier property, so that the barrier property of the barrier layer can be improved; the PE layer is used as the inner film layer, the appearance of the PE film is semitransparent, the PE film has the characteristics of no toxicity, no odor and no odor, and is reliable in sanitary performance, low in melting point and excellent in formability and heat seal property; through arranging PET, PVA and PE according to certain order complex preparation and obtaining the packaging film material for it has higher separation performance, in addition, because PET, PVA and PE are transparent or translucent macromolecular material, thereby can make the packaging film material that the preparation obtained have transparent characteristic, thereby more the person of facilitating the use observes the state of packing content.

2. The utility model provides a packaging film material, through set up the extinction oil layer on the surface printing layer, the extinction oil can play the effect of the dull and stereotyped of extinction, can reduce the reflection of light degree on packaging film material surface to make when preparing packaging film material for the wrapping bag, can the person of facilitating the use more observe the state of packing content.

3. The utility model provides a packaging film material sets up in the certain limit through the thickness with top layer printing layer, barrier layer and interior rete for packaging film material can easy machine-shaping.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural view of a packaging film in embodiment 1 of the present invention;

reference numerals:

1. an inner membrane layer; 2. a barrier layer; 21. a first coating layer; 22. an intermediate layer; 23. a second coating layer; 3. a surface print layer; 4. an adhesive layer; 5. and (4) a delustering oil layer.

Detailed Description

The following examples are provided for better understanding of the present invention, and are not limited to the best mode, and do not limit the scope and content of the present invention, and any product that is the same or similar to the present invention, which is obtained by combining the features of the present invention with other prior art or the present invention, falls within the scope of the present invention.

The examples do not show the specific experimental steps or conditions, and can be performed according to the conventional experimental steps described in the literature in the field. The reagents or instruments used are not indicated by manufacturers, and are all conventional reagent products which can be obtained commercially.

Example 1

As shown in fig. 1, the present embodiment relates to a packaging film material, which includes an inner film layer 1, a barrier layer 2 and a surface printing layer 3 sequentially arranged from inside to outside.

Wherein, interior rete 1 is the PE layer, and barrier layer 2 is including the first coating 21, intermediate level 22 and the second coating 23 of laying in proper order, and first coating 21 and second coating 23 are the PVA coating, and intermediate level 22 is the PET layer, and surface printing layer 3 is the PET layer. In this embodiment, the inner film layer 1, the barrier layer 2 and the surface print layer 3 are bonded and compounded, so that the adhesive layers 4 are formed between the inner film layer 1 and the barrier layer 2 and between the barrier layer 2 and the surface print layer 3, the adhesive layers 4 are polyurethane adhesive layers, the thickness of the surface print layer 3 is 7-20 μm, the thickness of the barrier layer 2 is 12 μm, and the thickness of the inner film layer 1 is 30-100 μm.

By adopting the PET layer as the surface printing layer 3, the PET film has the characteristics of high strength, good rigidity, transparency, high glossiness and the like, is colorless, tasteless, nontoxic and high in toughness, has the tensile strength 3 times that of PC films and nylon films and the impact strength 3-5 times that of BOPP films, has excellent wear resistance, folding resistance, pinhole resistance, tearing resistance and the like, has low thermal shrinkage, can improve the heat sealability, barrier property and printing adhesion of packaging film materials, and is low in water absorption rate and good in water resistance, so that the PET film is suitable for packaging food with high water content; a composite film of PET and PVA is used as the barrier layer 2, wherein the PVA has good oil resistance, solvent resistance and gas barrier property, and PVA films with good gas barrier property are arranged on two sides of the PET with good barrier property, so that the barrier property of the barrier layer 2 can be improved; the PE layer is adopted as the inner film layer 1, the appearance of the PE film is semitransparent, the PE film has the characteristics of no toxicity, no odor and no odor, and is reliable in sanitary performance, low in melting point and excellent in formability and heat seal property; through arranging PET, PVA and PE according to certain order complex preparation and obtaining the packaging film material for it has higher separation performance, in addition, because PET, PVA and PE are transparent or translucent macromolecular material, thereby can make the packaging film material that the preparation obtained have transparent characteristic, thereby more the person of facilitating the use observes the state of packing content.

For the state that more person of facilitating the use observes packing content, in this embodiment, packaging film still includes extinction oil layer 5, and extinction oil layer 5 sets up in the one side relative with barrier layer 2 of surperficial printing layer 3, and the effect that extinction oil can play the dull and stereotyped of extinction can reduce the reflection of light degree on packaging film surface to make when being the wrapping bag with packaging film preparation, can more person of facilitating the use observe the state of packing content.

The principle of use of this embodiment is generally as follows:

PE has good formability and heat seal nature, sanitary properties is reliable simultaneously, PET has better water proofness and barrier property, and PVA has better gas barrier property, become with forming barrier layer 2 jointly through all setting up PVA in PET layer both sides, thereby can improve barrier layer 2's barrier property, become with forming packaging film material through laying barrier layer 2 and PVA in proper order on the PE layer, make packaging film material's shaping processability better on the one hand, on the other hand, compare with barrier layer 2 that uses solitary PET layer preparation to become, the packaging film material of this embodiment has been equivalent to having contained three-layer sub-barrier layer in, through three-layer sub-barrier layer combined action, can improve packaging film material's the water proofness and soundness of the product, can improve packaging film material' sBarrier properties. After detection, the oxygen barrier property of the packaging film material provided by the embodiment is less than 1g/m³。

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications can be made without departing from the scope of the invention.

Claims

1. The utility model provides a packaging film material, its characterized in that includes interior rete (1), barrier layer (2) and surface printing layer (3) that from interior to exterior set gradually, interior rete (1) is the polyethylene layer, barrier layer (2) are including first coating (21), intermediate level (22) and second coating (23) that lay in proper order, first coating (21) with second coating (23) are the polyvinyl alcohol coating, intermediate level (22) are the polyethylene glycol terephthalate layer, surface printing layer (3) are the polyethylene glycol terephthalate layer.

2. The packaging film according to claim 1, wherein an adhesive layer (4) is arranged between the inner film layer (1) and the barrier layer (2) and between the barrier layer (2) and the surface printing layer (3).

3. The packaging film according to claim 2, wherein the adhesive layer (4) is a polyurethane adhesive layer.

4. The packaging film according to claim 1, further comprising a matte oil layer (5), the matte oil layer (5) being disposed on a side of the surface print layer (3) opposite to the barrier layer (2).

5. The packaging film according to any one of claims 1 to 4, wherein the thickness of the surface print layer (3) is 7-20 μm.

6. The packaging film according to any one of claims 1-4, wherein the barrier layer (2) has a thickness of 12 μm.

7. The packaging film according to any one of claims 1-4, wherein the thickness of the inner film layer (1) is 30-100 μm.