CN210617524U

CN210617524U - Transparent ultrahigh-strength PE film

Info

Publication number: CN210617524U
Application number: CN201920877779.3U
Authority: CN
Inventors: 黄作团; 黄家辉
Original assignee: Fujian Fuyijin Technology Co ltd
Current assignee: Fujian Fuyijin Technology Co ltd
Priority date: 2019-06-12
Filing date: 2019-06-12
Publication date: 2020-05-26
Anticipated expiration: 2029-06-12

Abstract

The utility model relates to a transparent superhigh intensity PE membrane, transparent superhigh intensity PE membrane comprises the metallocene polyethylene layer that stacks gradually, polyethylene polypropylene composite bed and ultrahigh molecular high density polyethylene layer, wherein ultrahigh molecular high density polyethylene layer does the inlayer of transparent superhigh intensity PE membrane, thickness are 0.005-0.01 mm. Transparent superhigh strength PE membrane processing method is simple and convenient, and the intensity of film is high, and the heat-seal temperature is low, can ensure that the broken package rate of product reduces or stops to have broken package rate for it is safer to pack the product transportation.

Description

Transparent ultrahigh-strength PE film

Technical Field

The utility model relates to a film material, especially a transparent superhigh strength PE membrane.

Background

Polyethylene films are widely applied to product packaging, and in order to obtain a good packaging effect, the films are generally required to have certain strength, and the tensile strength of the reinforced PE films in the existing market is generally about 20MPa and is not puncture-resistant. In order to obtain higher film strength, the phenomenon of high bag breaking rate is easy to occur after the product is used along with the increase of heat sealing temperature or the decrease of heat sealing strength, the load bearing of the product is not enough, and the filling and carrying requirements of customers cannot be met.

Chinese patent application CN106317694A discloses an ultratransparent and high tensile strength PVC film, which is prepared from the following raw materials, by mass, 100 parts of PVC resin, 1-7 parts of a plasticizer, 10-20 parts of a filler, 1.5-3 parts of a heat stabilizer, 0.5-2 parts of a lubricant, 1-2 parts of a softener, 2-12 parts of methacrylic acid-butadiene-styrene copolymerized resin, 1-2 parts of ethylene methyl methacrylate resin and 0.5-1.5 parts of a surface modifier, wherein the surface modifier is borate. According to the scheme, the PVC resin is modified through the cooperation of multiple components, and the high-strength PVC film is obtained, however, the PVC material is not suitable for food packaging, and potential food safety hazards exist.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the problem that overcome prior art and exist not enough, provide a transparent superhigh intensity PE membrane, transparent superhigh intensity PE membrane has superior tensile strength and puncture resistance, and the transparency is high, and the heat-seal temperature is lower than conventional enhancement mode PE membrane (140) and 150 ℃.

The specific scheme is as follows:

the utility model provides a transparent superhigh intensity PE membrane, transparent superhigh intensity PE membrane comprises metallocene polyethylene layer, polyethylene polypropylene composite bed and the ultra high molecular high density polyethylene layer that stacks gradually, wherein the ultra high molecular high density polyethylene layer is the inlayer of transparent superhigh intensity PE membrane, and thickness is 0.005-0.01 mm.

Further, the density of the metallocene polyethylene is 0.920-0.923g/cm³The melt index is 1.0-1.2g/10 min.

Further, the polyethylene polypropylene composite layer is a linear polyethylene and polypropylene mixture layer.

Further, the linear polyethylene has a crystallinity of 40 to 50% and a density of 0.915 to 0.920g/cm³。

Further, the ultra-high molecular weight has a high densityThe molecular weight of the ultrahigh molecular weight high density polyethylene in the polyethylene layer is 10-20 ten thousand, and the density is 0.94-0.96g/cm³。

Further, the thickness of the metallocene polyethylene layer is 0.005-0.02 mm.

Furthermore, the thickness of the polyethylene polypropylene composite layer is 0.01-0.03 mm.

Further, the thickness of the ultra-high molecular weight high density polyethylene layer is 0.007-0.008 mm.

Has the advantages that: transparent superhigh strength PE membrane adopts high-pressure polyethylene, metallocene polyethylene, linear polyethylene, polypropylene and the cooperation of ultrahigh molecular high density polyethylene, when obtaining ultrahigh tensile strength, has relatively lower heat-seal temperature concurrently. Wherein the high density polyethylene preferably has a melt index of 7.0-7.6g/min and a density of 0.945-0.955g/cm³(ii) a The metallocene polyethylene preferably has a density of from 0.920 to 0.923g/cm³The melt index is 1.0-1.2g/10min, and the addition of the metallocene polyethylene is beneficial to reducing the heat sealing temperature of the product and improving the relative strength of heat sealing; the linear polyethylene preferably has a crystallinity of 40 to 50% and a density of 0.915 to 0.920g/cm³Linear polyethylene with crystallinity of more than 50% can greatly raise the heat sealing temperature of the product; the preferred molecular weight of the ultra-high molecular weight high density polyethylene is 10-20 ten thousand, and the density is 0.94-0.96g/cm³The ultra-high molecular weight high density polyethylene has a great influence on the strength of the product.

Furthermore, in the ultra-high strength transparent PE film of the present invention, a processing aid is added to obtain better film processability, preferably at least one of a compatibilizer and a coupling agent, especially when the compatibilizer is ethylene acrylic acid and the coupling agent is a titanate coupling agent,

drawings

Fig. 1 is a schematic structural view of a transparent ultra-high strength PE film provided in embodiment 1 of the present invention.

Detailed Description

The technical solution of the present invention will be further explained with reference to the following examples. The examples do not specify particular techniques or conditions, and are performed according to the techniques or conditions described in the literature in the art or according to the product specifications. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products commercially available.

The metallocene polyethylene in the examples had a density of 0.920g/cm³The melt index is 1.0g/10 min; the linear polyethylene had a crystallinity of 45% and a density of 0.918g/cm³(ii) a The molecular weight of the ultra-high molecular weight high-density polyethylene is 18-20 ten thousand, and the density is 0.95-0.96g/cm³。

Example 1

Referring to fig. 1, the transparent ultra-high strength PE film is composed of a metallocene polyethylene layer 1, a polyethylene polypropylene composite layer 2, and an ultra-high molecular weight high density polyethylene layer 3, which are sequentially laminated. Wherein the metallocene polyethylene layer 1 is composed of metallocene polyethylene and has a thickness of 0.005 mm; the polyethylene polypropylene composite layer 2 is a mixture layer of linear polyethylene and polypropylene, and the mixture layer of linear polyethylene and polypropylene is obtained by mixing the linear polyethylene and polypropylene and adding the mixture layer into a co-extrusion film blowing machine for blow molding, wherein the thickness of the mixture layer of linear polyethylene and polypropylene is 0.01 mm.

The ultra-high molecular high density polyethylene layer 3 is an inner layer of a transparent ultra-high strength PE film, is in direct contact with a product when the product is packaged, is made of ultra-high molecular high density polyethylene, and has the thickness of 0.01 mm.

The transparent ultrahigh-strength PE film has high film surface transparency and higher glossiness, and meets the requirement of food grade. Carry out capability test to the product, the transparent superhigh strength PE membrane 39.5MPa (horizontal), 41.2MPa (vertical), horizontal tensile elongation at break is 804%, has better resistant puncture effect, can ensure the reduction of product broken package rate or stop to have broken package rate for it is safer to pack the product transportation. The transparent ultrahigh-strength PE film can be subjected to heat sealing at the temperature of 110-120 ℃, and has high heat sealing strength and good heat bonding performance.

Example 2

The transparent ultrahigh-strength PE film consists of a metallocene polyethylene layer 1, a polyethylene polypropylene composite layer 2 and an ultrahigh molecular weight high density polyethylene layer 3 which are sequentially laminated. Wherein, the metallocene polyethylene layer 1 is composed of metallocene polyethylene and has a thickness of 0.02 mm; the polyethylene polypropylene composite layer 2 is a mixture layer of linear polyethylene and polypropylene, and the mixture layer of linear polyethylene and polypropylene is obtained by mixing the linear polyethylene and polypropylene and adding the mixture layer into a co-extrusion film blowing machine for blow molding, wherein the thickness of the mixture layer of linear polyethylene and polypropylene is 0.01 mm.

The transparent ultrahigh-strength PE film has high film surface transparency and higher glossiness, and meets the requirement of food grade. The product is subjected to performance test, the transverse tensile elongation at break of the transparent ultrahigh-strength PE film is 802% under 41.6MPa (transverse) and 42.5MPa (longitudinal), and the transparent ultrahigh-strength PE film has a better puncture-resistant effect, can ensure the reduction of the broken package rate of the product or avoid the broken package rate, and enables the transportation of the packaged product to be safer. The transparent ultrahigh-strength PE film can be subjected to heat sealing at the temperature of 110-120 ℃, and has high heat sealing strength and good heat bonding performance.

Example 3

The transparent ultrahigh-strength PE film consists of a metallocene polyethylene layer 1, a polyethylene polypropylene composite layer 2 and an ultrahigh molecular weight high density polyethylene layer 3 which are sequentially laminated. Wherein, the metallocene polyethylene layer 1 is composed of metallocene polyethylene and has a thickness of 0.01 mm; the polyethylene polypropylene composite layer 2 is a mixture layer of linear polyethylene and polypropylene, and the mixture layer of linear polyethylene and polypropylene is obtained by mixing the linear polyethylene and polypropylene and adding the mixture layer into a co-extrusion film blowing machine for blow molding, wherein the thickness of the mixture layer of linear polyethylene and polypropylene is 0.03 mm.

The ultra-high molecular high density polyethylene layer 3 is an inner layer of a transparent ultra-high strength PE film, is in direct contact with a product when the product is packaged, is made of ultra-high molecular high density polyethylene, and has the thickness of 0.007 mm.

The transparent ultrahigh-strength PE film has high film surface transparency and higher glossiness, and meets the requirement of food grade. The product is subjected to performance test, the transverse tensile elongation at break of the transparent ultrahigh-strength PE film is 785% under 42.3MPa (transverse) and 44.8MPa (longitudinal), and the transparent ultrahigh-strength PE film has a better puncture-resistant effect, can ensure the reduction of the broken package rate of the product or avoid the broken package rate, and enables the transportation of the packaged product to be safer. The transparent ultrahigh-strength PE film can be subjected to heat sealing at the temperature of 110-120 ℃, and has high heat sealing strength and good heat bonding performance.

Example 4

The transparent ultrahigh-strength PE film consists of a metallocene polyethylene layer 1, a polyethylene polypropylene composite layer 2 and an ultrahigh molecular weight high density polyethylene layer 3 which are sequentially laminated. Wherein, the metallocene polyethylene layer 1 is composed of metallocene polyethylene and has a thickness of 0.015 mm; the polyethylene polypropylene composite layer 2 is a mixture layer of linear polyethylene and polypropylene, and the mixture layer of linear polyethylene and polypropylene is obtained by mixing the linear polyethylene and polypropylene and adding the mixture layer into a co-extrusion film blowing machine for blow molding, wherein the thickness of the mixture layer of linear polyethylene and polypropylene is 0.015 mm.

The ultra-high molecular high density polyethylene layer 3 is an inner layer of a transparent ultra-high strength PE film, is in direct contact with a product when the product is packaged, is made of ultra-high molecular high density polyethylene, and has the thickness of 0.008 mm.

The transparent ultrahigh-strength PE film has high film surface transparency and higher glossiness, and meets the requirement of food grade. The product is subjected to performance test, 39.6MPa (transverse) and 41.2MPa (longitudinal) of the transparent ultrahigh-strength PE film, the transverse tensile elongation at break is 810%, the puncture resistance effect is good, the reduction of the product bag breaking rate can be ensured or the bag breaking rate is completely eradicated, and the packaged product is safer to transport. The transparent ultrahigh-strength PE film can be subjected to heat sealing at the temperature of 110-120 ℃, and has high heat sealing strength and good heat bonding performance.

Although embodiments of the present invention have been shown and described, it is to be understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that changes, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the principles and spirit of the present invention.

Claims

1. A transparent ultra-high strength PE film is characterized in that: the transparent ultrahigh-strength PE film is composed of a metallocene polyethylene layer, a polyethylene polypropylene composite layer and an ultrahigh-molecular high-density polyethylene layer which are sequentially stacked, wherein the ultrahigh-molecular high-density polyethylene layer is the inner layer of the transparent ultrahigh-strength PE film, and the thickness of the ultrahigh-molecular high-density polyethylene layer is 0.005-0.01 mm.

2. The transparent ultra-high strength PE film according to claim 1, characterized in that: the thickness of the metallocene polyethylene layer is 0.005-0.02 mm.

3. The transparent ultra-high strength PE film according to claim 1, characterized in that: the thickness of the polyethylene polypropylene composite layer is 0.01-0.03 mm.

4. The transparent ultra-high strength PE film according to claim 1, characterized in that: the thickness of the ultrahigh molecular high density polyethylene layer is 0.007-0.008 mm.