CN215740484U

CN215740484U - Aluminum-plastic film for ointment hose

Info

Publication number: CN215740484U
Application number: CN202122136341.XU
Authority: CN
Inventors: 魏广富; 赵换香; 许双艳; 王志勇; 李书建; 高建民; 华金平; 赵晓亮
Original assignee: Anyang Hua Qiang Packaging Industry Co ltd
Current assignee: Anyang Hua Qiang Packaging Industry Co ltd
Priority date: 2021-09-06
Filing date: 2021-09-06
Publication date: 2022-02-08
Anticipated expiration: 2031-09-06

Abstract

The utility model provides an ointment is plastic-aluminum membrane for hose, includes first aluminium foil layer and second aluminium foil layer, is provided with the waterproof layer between first aluminium foil layer and second aluminium foil layer, the waterproof layer is the butyl glue layer, is provided with the polyester protective layer above first aluminium foil layer, is provided with the hot melt layer below second aluminium foil layer, the polyester protective layer is the PEN layer, the hot melt layer is the EVOH layer, is provided with first adhesive layer between polyester protective layer and first aluminium foil layer, is provided with the second adhesive layer between second aluminium foil layer and hot melt layer. The hose made of the aluminum plastic film can meet the requirement of packaging ointment with extremely high barrier property.

Description

Aluminum-plastic film for ointment hose

Technical Field

The utility model particularly relates to an aluminum-plastic film for an ointment hose, and belongs to the technical field of medicinal packaging materials.

Background

In the ointment and cosmetic industry, the all-plastic multi-layer composite hose is generally applied, but is still insufficient in strength and barrier property. The aluminum foil is used as a metal material, has no toxicity, no smell, shading property and extremely high moisture resistance and gas barrier property, the barrier property of the aluminum foil is incomparable and irreplaceable with any other high polymer material and vapor deposition film, the aluminum foil cannot recover after deformation, and the aluminum foil is suitable for extrusion of ointment, and the aluminum-plastic composite hose combines the properties of metal and plastic, so that the aluminum-plastic composite hose not only keeps the corrosion resistance of the all-plastic composite hose, but also has the property of the aluminum foil, improves the strength and the barrier property of the hose, expands the use range of packaging, and is widely applied to the packaging occasions of high-barrier drugs. However, in actual production, due to many factors, pinhole defects are inevitably generated in aluminum foils with thicknesses of several tens of micrometers. It is also due to the presence of the pinholes that the oxygen and water vapor transmission rates of the aluminum foil are not zero. The size and number of the aluminum foil pinholes have a decisive influence on the moisture resistance, gas barrier properties and light-blocking properties of the aluminum foil and its composite materials. Therefore, the aluminum plastic film with high barrier property and zero pinhole degree is required to be developed to manufacture the flexible tube so as to meet the ointment package with extremely high barrier property requirements.

Disclosure of Invention

Aiming at the problems in the prior art, the utility model provides an aluminum plastic film for an ointment hose, and aims to solve the problem that the existing aluminum plastic film still has a certain pinhole degree and cannot meet the requirement of extremely high barrier property.

The technical scheme of the utility model is as follows: the utility model provides an ointment is plastic-aluminum membrane for hose, includes first aluminium foil layer and second aluminium foil layer, is provided with the waterproof layer between first aluminium foil layer and second aluminium foil layer, the waterproof layer is the butyl glue layer, is provided with the polyester protective layer above first aluminium foil layer, is provided with the hot melt layer below second aluminium foil layer, the polyester protective layer is the PEN layer, the hot melt layer is the EVOH layer, is provided with first adhesive layer between polyester protective layer and first aluminium foil layer, is provided with the second adhesive layer between second aluminium foil layer and hot melt layer.

Further, the first aluminum foil layer and the second aluminum foil layer have the same thickness, and the thickness range is 15-50 micrometers.

Further, the thickness of the PEN layer is 20-50 microns.

Further, the hot melt layer is EVOH, and the thickness of the hot melt layer is 30-50 microns.

Further, the first adhesive layer and the second adhesive layer are modified polyurethane adhesive layers.

The utility model has the beneficial effects that: the aluminum-plastic film takes a double-layer aluminum foil layer positioned in the center as a main body framework, and the upper aluminum foil layer and the lower aluminum foil layer are bonded together by taking butyl rubber as a waterproof layer between the two aluminum foil layers, so that pinholes on the two aluminum foils can be staggered and effectively blocked, and a moisture-proof function is achieved; the outermost PEN polyester layer of reunion, utilize its good mechanical properties and high barrier properties, can play the effect of effectual isolated external steam and oxygen, play effective protection for inside aluminium foil, show the intensity that increases whole complex film, polyurethane adhesive layer plays the bonding effect simultaneously and can play certain buffering effect again, prevent that the aluminium foil from producing the pinhole after the extrusion, consequently, the hose of the plastic-aluminum membrane preparation of utilizing this patent can satisfy the packing of the ointment of high barrier properties requirement.

Drawings

Fig. 1 is a schematic cross-sectional structure of the present invention.

Detailed Description

The utility model will be described more fully with reference to the accompanying drawings.

As shown in fig. 1, the aluminum plastic film for ointment hose sequentially comprises a polyester layer 1, a first adhesive layer 2, a first aluminum foil layer 3, a waterproof layer 4, a second aluminum foil layer 5, a second adhesive layer 6 and a hot melt layer 7 from top to bottom, and all the layers are mutually bonded to form an aluminum plastic composite film.

The PET film is characterized in that the polyester layer 1 is a PEN film, the PEN is an abbreviation of polyethylene terephthalate, compared with the conventional PET polyester, the PET film has higher heat-resistant temperature and excellent mechanical property, the Young modulus of the PET film is 2.5 times that of the PET film, the PEN film has better gas barrier property, the barrier rate of the PEN film to oxygen and carbon dioxide is 4-5 times that of the PET film, the barrier rate of the PEN film to water vapor is 3-4 times that of the PET film, and the PEN film also has the characteristics of excellent high transparency, acid and alkali resistance, organic solvent resistance, hydrolysis resistance and the like. In this example, the thickness of PEN is between 20 and 50 microns, preferably 40 microns, and provides the outermost layer of protection for the composite film from moisture and oxygen; the lower surface of the packaging film can be printed with a printing ink layer, and various attributes of the packaged contents can be conveniently displayed due to high light transmittance.

First aluminium foil layer 3 and second aluminium foil layer 5 are soft state aluminium foil to more do benefit to combined machining, its thickness is 15-50 microns, it is preferred, the thickness of first aluminium foil layer and second aluminium foil layer is the same, be 25 microns, existing being favorable to getting ready and processing like this, compare simultaneously in the individual layer aluminium foil that thickness is 50 microns, waterproof layer 4 has been pressed from both sides between the two-layer, can make the pinhole of two-layer aluminium foil stagger each other, prevent to have the existence that link up the pinhole, its mechanical properties also than the individual layer with thickness will be high.

The waterproof layer 4 is a butyl glue layer, is sprayed on the single-layer aluminum foil layer by a spraying method, and the coating weight is preferably 10-20g/m²The aluminum foil sandwich structure is used for plugging pinholes on the aluminum foil, blocking a water vapor channel and then compounding another layer of aluminum foil to form a sandwich structure.

The hot-melt layer 7 is EVOH which is an ethylene-vinyl alcohol copolymer having excellent processability and thermal stability, and exhibiting excellent blocking effect against gas, odor, perfume, solvent, etc., and has a thickness of 30 to 50 micrometers, preferably 45 micrometers.

The first adhesive layer 2 and the second adhesive layer 6 are both polyurethane adhesive layers, and an alcohol-water polyurethane modified polyacrylate adhesive is adopted, and nontoxic alcohol-water mixed gas is discharged during drying of the adhesive, so that the defect of the existing non-environment-friendly adhesive is overcome. The coating weight is preferably 2 to 4g/m²The polyurethane adhesive layer can play both a role of adhesion and a role of buffering.

The manufacturing process of the aluminum-plastic composite film and the hose is as follows: the method comprises the steps of thermally spraying a butyl rubber waterproof layer 4 on a first aluminum foil 3, then carrying out hot-pressing compounding with a first aluminum foil 5, then spraying a first polyurethane adhesive layer 2 on the first aluminum foil 3, then carrying out compound adhesion with a polyester PEN layer 1 printed with patterns, then spraying a second polyurethane adhesive layer 6 on the lower surface of a second aluminum foil 6, then covering an EVOH hot-melt layer 7 on the second aluminum foil, carrying out hot-pressing drying to obtain a finished composite film, and then carrying out pipe coiling, heat-sealing and welding to obtain the aluminum-plastic hose. This hose adopts double-deck aluminium foil composite construction, has stopped the pinhole problem of aluminium foil composite film basically, and because the cushioning effect on two-layer aluminium foil elastic waterproof layer and gluing agent layer, so be difficult for producing the pinhole when being rolled over and pressed, improved the barrier property of aluminium foil composite film, have excellent external steam oxygen barrier performance, the light-resistant, prevent that the smell of inside medicine from outwards diffusing, the comprehensive properties of packing is good.

Claims

1. An aluminum-plastic film for ointment hoses is characterized in that: including first aluminium foil layer and second aluminium foil layer, be provided with the waterproof layer between first aluminium foil layer and second aluminium foil layer, the waterproof layer is the butyl glue layer, is provided with the polyester protective layer above first aluminium foil layer, is provided with the hot melt layer below second aluminium foil layer, the polyester protective layer is the PEN layer, the hot melt layer is the EVOH layer, is provided with first adhesive layer between polyester protective layer and first aluminium foil layer, is provided with the second adhesive layer between second aluminium foil layer and hot melt layer.

2. The aluminum-plastic film for ointment hoses as claimed in claim 1, wherein: the first and second aluminum foil layers have the same thickness, which is in the range of 15-50 microns.

3. The aluminum-plastic film for ointment hoses as claimed in claim 1, wherein: the thickness of the PEN layer is 20-50 microns.

4. The aluminum-plastic film for ointment hoses as claimed in claim 1, wherein: the hot melt layer is EVOH, and the thickness of the hot melt layer is 30-50 microns.

5. The aluminum-plastic film for ointment hoses as claimed in claim 1, wherein: the first adhesive layer and the second adhesive layer are modified polyurethane adhesive layers.