CN109648968A - A kind of two-way easily tore film - Google Patents
A kind of two-way easily tore film Download PDFInfo
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- CN109648968A CN109648968A CN201811551059.4A CN201811551059A CN109648968A CN 109648968 A CN109648968 A CN 109648968A CN 201811551059 A CN201811551059 A CN 201811551059A CN 109648968 A CN109648968 A CN 109648968A
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- weight percent
- ethylene
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- density polyethylene
- tore film
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
- B32B27/308—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising acrylic (co)polymers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
- B32B27/327—Layered products comprising a layer of synthetic resin comprising polyolefins comprising polyolefins obtained by a metallocene or single-site catalyst
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2250/00—Layers arrangement
- B32B2250/03—3 layers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2250/00—Layers arrangement
- B32B2250/24—All layers being polymeric
- B32B2250/242—All polymers belonging to those covered by group B32B27/32
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/40—Properties of the layers or laminate having particular optical properties
- B32B2307/412—Transparent
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Laminated Bodies (AREA)
Abstract
The invention discloses a kind of two-way easily tore film, the two-way PE easily tore film is three layers, including outer layer, middle layer, internal layer.Outer layer includes hp-ldpe, low-pressure high-density polyethylene, linear low density polyethylene, ethylene-acrylic acid copolymer；Middle layer include low density polyethylene (LDPE), metallocene medium density polyethylene, ethylene-methacrylic acid copolymer, from aggressiveness or the dilute copolymer of ethylene-norborneol；Internal layer includes, hp-ldpe, metallocene low density polyethylene (LDPE), linear low density polyethylene, the pungent dilute copolymer of ethylene-, functional agglomerate.The two-way easily tore film have compound fastness is good, transparency is high, it is two-way be easily torn into straight line, the features such as customer experience is good, at low cost.
Description
Technical field
The present invention relates to the technical field of packaging film more particularly to it is a kind of using low density polyethylene (LDPE), high density polyethylene (HDPE),
Ethylene-methacrylic acid copolymer, shaped from the raw materials such as aggressiveness or the dilute copolymer of the poly- borneol of ethylene-by coextrusion film blowing it is two-way
Easily tore film.
Background technique
With the continuous improvement of people's living standards, being no longer limited only to shelf for the demand of plastic flexible package performance
It shows, content seal protection is convenient for carrying etc..How conveniently and efficiently to open packaging becomes trend.Outside food and medicine
The design of easily tearing of packaging embodies the convenience of life, it is no longer necessary to which tool opens.But one is torn by beating for existing easily tore film
Breach or jaggies realization are easily torn；Another kind is easily to tear effect by controlling the depth control of laser cut line, and there is following
Problem:
1. tearing port or jaggies frequently can lead to tear bad or tearing notch edge out-of-flatness since tearing notch guiding performance is poor,
Cause content unrestrained；
2. laser cut line is easily torn, although tearing notch is smooth, if that cuts is too deep, the leakproofness of packaging can be deteriorated, the shelf-life
Impacted, that cuts is too shallow, and is not easy to tear；
3. or more 2 kinds of methods require to carry out packaging bag subsequent processing, the position of tearing notch or easy-torn line is fixed, and is wrapped
Pack, which only has in some specific region, easily tears effect, can not fully meet the demand that people efficiently live；
4. low efficiency, technique is difficult to control.
Summary of the invention
The purpose of the invention is to overcome the above-mentioned prior art, a kind of two-way easily tore film is provided, this is two-way easily
The direction in length and breadth of dyestripping, which all has, easily tears straight effect, i.e., two-way to be easily torn into straight line, also has compound fastness height, transparency
Well, heat-sealing window is wide, heat-sealing temperature is low, be suitble to the production of high-speed packet wiring, effectively increases production efficiency reduces cost, Ke Huti
The advantages that having tested.
The technical solution adopted by the present invention to solve the technical problems is: a kind of two-way easily tore film is made of three-decker,
It is followed successively by outer layer, middle layer and internal layer,
Hp-ldpe that-the outer layer is 20%-70% by weight percent, weight percent are
High density polyethylene (HDPE), the weight percent of 10%-40% is the linear low density polyethylene of 15%-65%, weight percent
The ethylene-acrylic acid copolymer (EAA) of 5%-40% forms；
Hp-ldpe that-the middle layer is 10%-60% by weight percent, weight percent
10%-50% metallocene medium density polyethylene, the ethylene-methacrylic acid copolymer that weight percent is 15%-60%
(EMAA), weight percent is 15%-65% from aggressiveness (Ionomer) or the dilute copolymer composition of ethylene-norborneol；
- the internal layer is by hp-ldpe, the weight percent of weight percent 25%-64.5%
The metallocene low density polyethylene (LDPE) of 15%-50%, linear low density polyethylene, the weight that weight percent is 10%-49.5%
The functional agglomerate composition that the pungent dilute copolymer of the ethylene-that percentage is 10%-40%, weight percent are 0.5%-10%.
Further, the functional agglomerate of the internal layer is made of silica opening agent, antistatic agent, PPA.
Further, the hp-ldpe of the outer layer, middle layer and internal layer is all made of high pressure tubular method or kettle
The production of formula method, melting means 0.75-10g/10min, density 0.924-0.933g/cm3。
Further, the linear low density polyethylene of the outer layer and internal layer is poly- for butylene or the low-density of oneself dilute copolymerization
Ethylene, melting means 1-2g/10min, density 0.918-0.926g/cm3；The melting means of the high density polyethylene (HDPE) of the outer layer
0.07-2g/10min, density 0.945-0.961g/cm3。
Further, the acrylic acid alkene content of the ethylene-acrylic acid copolymer of the outer layer is 5-9.7%, melting means 1-
10g/cm3。
Further, the metallocene medium density polyethylene in the middle layer is that oneself that produced with metallocene catalyst is dilute and pungent
Any one in dilute, melting means 0.2-3.5g/min, density 0.930-0.940g/cm3。
Further, the ethylene-methacrylic acid copolymer melting means in the middle layer is 0.5-2g/10min, and density is
0.930-0.940g/cm3；The melting means of the dilute copolymer of ethylene-norborneol in the middle layer is 2-6g/10min, and density is
1.01-1.02g/cm3。
Further, the metallocene low density polyethylene (LDPE) of the internal layer is that oneself that produced with metallocene catalyst is dilute and pungent
Any one in dilute, melting means 1-2g/min, density 0.915-0.920g/cm3。
Further, the melting means of the pungent dilute copolymer of the ethylene-of the internal layer is 0.8-3.2g/10min；Density is
0.890-0.910g/cm3。
Further, the weight ratio of the outer layer, middle layer and internal layer is 2:1:2 or 1:1:1 or 3:4:3 or 1:2:1
Or 1:3:1.
In conclusion the direction in length and breadth of two-way easily tore film of the invention, which all has, easily tears straight effect, i.e., it is two-way easy
Be torn into straight line, also have compound fastness is high, transparency is good, heat-sealing window is wide, heat-sealing temperature is low, be suitble to the production of high-speed packet wiring,
Effectively increasing production efficiency reduces the advantages that cost, customer experience are good.
Specific embodiment
Embodiment 1
A kind of two-way easily tore film described in the present embodiment 1, has a three-decker, respectively outer layer, middle layer and internal layer, and three
Weight percent between layer material is respectively as follows: outer layer 30%, middle layer 40%, internal layer 30%；Each layer is grouped as by following group:
The each component and weight percent of outer layer:
The each component and weight percent in middle layer:
The each component and weight percent of internal layer:
The method for preparing this two-way easily tore film is: respectively by the raw material of outer layer, middle layer and internal layer by above-mentioned weight percent
Than by automatic mixing system it is mixed after, the raw material of each layer is separately added into outer layer extruder, middle layer extruder, inner layer extruder
Feeding die head is coextruded into film bubble after carrying out fusion plastification, winds, can be obtained two-way after cooling, sided corona treatment through automatic air ring
Easily tore film；Wherein the temperature of outer layer extruder is 165-180 DEG C, extrusion pressure 200-380bar；The temperature of middle layer extruder is
145-170 DEG C, extrusion pressure 250-450bar；The temperature of inner layer extruder is 160-175 DEG C, extrusion pressure 220-480bar；
Die head temperature is 180-200 DEG C.
Embodiment 2
The present embodiment 2 is to be changed on the basis of embodiment 1, has the weight between outer layer, middle layer and internal layer
Percentage is different, and component of each layer etc. is identical, specific as follows:
The weight percent of the layers of material of the outer layer of the present embodiment 2, middle layer and internal layer is respectively as follows: outer layer 25%, middle layer
50%, internal layer 25%.
Embodiment 3
A kind of two-way easily tore film described in the present embodiment 3, has a three-decker, respectively outer layer, middle layer and internal layer, and three
Weight percent between layer material is respectively as follows: outer layer 20%, middle layer 55%, internal layer 25%；Each layer is grouped as by following group:
The each component and weight percent of outer layer:
The each component and weight percent in middle layer:
The each component and weight percent of internal layer:
Embodiment 4
The present embodiment 4 is changed on the basis of embodiment 3, has the weight between outer layer, middle layer and internal layer
Percentage is different, and component of each layer etc. is identical, specific as follows: the layers of material of the outer layer of the present embodiment 4, middle layer and internal layer
Weight percent is respectively as follows: outer layer 20%, middle layer 60%, internal layer 20%.
Embodiment 5
A kind of two-way easily tore film described in the present embodiment 5, has a three-decker, respectively outer layer, middle layer and internal layer, and three
Weight percent between layer material is respectively as follows: outer layer 35%, middle layer 45%, internal layer 25%；Each layer is grouped as by following group:
The each component of outer layer and the weight percent of raw material:
The each component and weight percent in middle layer:
The each component and weight percent of internal layer:
Embodiment 6
A kind of two-way easily tore film described in the present embodiment 6, has a three-decker, respectively outer layer, middle layer and internal layer, and three
Weight percent between layer material is respectively as follows: outer layer 25%, middle layer 50%, internal layer 25%；Each layer is grouped as by following group:
The each component of outer layer and the weight percent of raw material:
The each component and weight percent in middle layer:
The each component and weight percent of internal layer:
Table 1
Tensile strength, the elongation at break, angle tear strength of the two-way easily tore film of embodiment 1-6 can be obtained from table 1
Performance it is all very good, have and two-way easily tear straight good result.
The above described is only a preferred embodiment of the present invention, not making any form to technical solution of the present invention
On limitation.According to the technical essence of the invention any simple modification to the above embodiments, equivalent variations and repair
Decorations, in the range of still falling within technical solution of the present invention.
Claims (10)
1. a kind of two-way easily tore film, is made of three-decker, it is followed successively by outer layer, middle layer and internal layer, it is characterised in that:
Hp-ldpe that-the outer layer is 20%-70% by weight percent, weight percent 10%-
40% high density polyethylene (HDPE), weight percent are the linear low density polyethylene of 15%-65%, weight percent 5%-40%
Ethylene-acrylic acid copolymer composition；
The 10%- that the hp-ldpe that-middle layer is 10%-60% by weight percent, weight percent are
50% metallocene medium density polyethylene, weight percent are the ethylene-methacrylic acid copolymer of 15%-60%, weight percent
Than being 15%-65% from aggressiveness or the dilute copolymer composition of ethylene-norborneol；
Hp-ldpe, weight percent 15%- of the-internal layer by weight percent 25%-64.5%
50% metallocene low density polyethylene (LDPE), weight percent are the linear low density polyethylene of 10%-49.5%, weight percent
The functional agglomerate composition that the pungent dilute copolymer of ethylene-, weight percent for 10%-40% are 0.5%-10%.
2. a kind of two-way easily tore film according to claim 1, it is characterised in that: the functional agglomerate of the internal layer is by dioxy
SiClx opening agent, antistatic agent, PPA composition.
3. a kind of two-way easily tore film according to claim 1, it is characterised in that: the height of the outer layer, middle layer and internal layer
It forces down density polyethylene and is all made of high pressure tubular method or the production of autoclave method, melting means 0.75-10g/10min, density 0.924-
0.933g/cm3。
4. a kind of two-way easily tore film according to claim 1, it is characterised in that: the outer layer and internal layer it is linear low close
Spending polyethylene is butylene or the low density polyethylene (LDPE) of oneself dilute copolymerization, melting means 1-2g/10min, density 0.918-0.926g/
cm3；The melting means 0.07-2g/10min of the high density polyethylene (HDPE) of the outer layer, density 0.945-0.961g/cm3。
5. a kind of two-way easily tore film according to claim 1, it is characterised in that: the ethylene-acrylic acid of the outer layer is total
The acrylic acid alkene content of polymers is 5-9.7%, melting means 1-10g/cm3。
6. a kind of two-way easily tore film according to claim 1, it is characterised in that: density is poly- in the metallocene in the middle layer
Ethylene be oneself that produced with metallocene catalyst it is dilute and it is pungent it is dilute in any one, melting means 0.2-3.5g/min, density is
0.930-0.940g/cm3。
7. a kind of two-way easily tore film according to claim 1, it is characterised in that: the ethylene-metering system in the middle layer
Acid copolymer melting means is 0.5-2g/10min, density 0.930-0.940g/cm3；Ethylene-the norborneol in the middle layer is dilute total
The melting means of polymers is 2-6g/10min, density 1.01-1.02g/cm3。
8. a kind of two-way easily tore film according to claim 1, it is characterised in that: the metallocene low-density of the internal layer is poly-
Ethylene be oneself that produced with metallocene catalyst it is dilute and it is pungent it is dilute in any one, melting means 1-2g/min, density 0.915-
0.920g/cm3。
9. a kind of two-way easily tore film according to claim 1, it is characterised in that: the pungent dilute copolymerization of the ethylene-of the internal layer
The melting means of object is 0.8-3.2g/10min；Density is 0.890-0.910g/cm3。
10. a kind of two-way easily tore film according to claim 1, it is characterised in that: the weight of the outer layer, middle layer and internal layer
The ratio between amount is 2:1:2 or 1:1:1 or 3:4:3 or 1:2:1 or 1:3:1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811551059.4A CN109648968B (en) | 2018-12-18 | 2018-12-18 | Two-way easy-to-tear film |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811551059.4A CN109648968B (en) | 2018-12-18 | 2018-12-18 | Two-way easy-to-tear film |
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| Publication Number | Publication Date |
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| CN109648968A true CN109648968A (en) | 2019-04-19 |
| CN109648968B CN109648968B (en) | 2020-08-21 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114030258A (en) * | 2021-11-18 | 2022-02-11 | 青岛东海包装产业有限公司 | Ultralow-strength easy-tear PE film and preparation process thereof |
| CN115556450A (en) * | 2022-09-26 | 2023-01-03 | 湖北慧狮塑业股份有限公司 | Ultra-thin polyolefin dry film protective film |
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| CN109648968B (en) | 2020-08-21 |
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Effective date of registration: 20200727 Address after: Building 8, No.3, Huagui Er Road, Duruan Town, Pengjiang district, Jiangmen City, Guangdong Province 529075 Applicant after: Jiangmen Hualong membrane materials Co.,Ltd. Address before: Du Ruan Zhen Ying Hua Lu Pengjiang District 529000 Guangdong city of Jiangmen province No. 26 building three or four layer Applicant before: JIANGMEN PENGJIANG HUALONG PACKING MATERIAL Co.,Ltd. |
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