CN102673882A - Liquid package composite membrane and preparation method thereof - Google Patents

Liquid package composite membrane and preparation method thereof Download PDF

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Publication number
CN102673882A
CN102673882A CN201210184373XA CN201210184373A CN102673882A CN 102673882 A CN102673882 A CN 102673882A CN 201210184373X A CN201210184373X A CN 201210184373XA CN 201210184373 A CN201210184373 A CN 201210184373A CN 102673882 A CN102673882 A CN 102673882A
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China
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layer
barrier layer
gluing
packaging composite
liquid packaging
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CN201210184373XA
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Chinese (zh)
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CN102673882B (en
Inventor
张文锋
曾文明
孙国锦
杨虎平
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浙江金石包装有限公司
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Abstract

The invention provides a liquid package composite membrane and a preparation method thereof and belongs to the technical field of plastic package. The composite membrane comprises a surface layer, an obstruction layer, a reinforced layer and a heat seal layer, wherein the surface layer is a polyethylene terephthalate film layer; the obstruction layer is an aluminum foil layer; the reinforced layer is a polyethylene terephthalate film layer; and the heat seal layer consists of the following materials: 40-60wt% of eight-carbon linear low-density polyethylene, 35-50wt% of polyvinyl acetate and 5-10wt% of low-density polyethylene. The liquid package composite membrane provided by the invention has excellent break-resistant and pressure-resistant performances; break-resistant performance test shows that the liquid package composite membrane does not break while falling to a cement floor from a height of 10 meters once; and pressure-resistant performance test shows that the liquid package composite membrane has no leakage within 24 hours when the static pressure is 20MPa.

Description

A kind of liquid packaging composite film and preparation method thereof
Technical field
The present invention relates to a kind of liquid packaging composite film and preparation method thereof, be specifically related to a kind of anti-preparation method who falls complex film and this complex film of withstand voltage pack for liquids that is used to make, belong to the plastic wrapping technical field.
Background technology
In the prior art, be used for the complex film of packaging bag, its structure generally includes protective cover, barrier layer and hot sealing layer, and wherein protective cover is that printed patterns is shielded; Barrier layer is a functional layer, has functions such as choke, shading; Hot sealing layer has been the heat-sealing effect, adopts polyethylene foil or polypropylene film as heat-sealable material usually.The packaging bag that complex film of the prior art is processed exists withstand voltage properties poor, just gently falls and causes packaging bag to break easily, the problem that article leak in the bag.
In order to solve the problems of the technologies described above, Chinese patent document CN202072106U discloses a kind of withstand voltage packaging composite film, and structure comprises top layer, barrier layer and hot sealing layer; Between top layer and the barrier layer bonding coat is arranged, between barrier layer and the hot sealing layer enhancement Layer is set, also be respectively arranged with bonding coat between barrier layer and enhancement Layer and enhancement Layer and the hot sealing layer; Polyester is adopted on above-mentioned top layer; Barrier layer adopts aluminium foil, and enhancement Layer adopts polyester, and hot sealing layer adopts poly-vinyl.Above-mentioned withstand voltage packaging composite film, owing between barrier layer and hot sealing layer, increased enhancement Layer, the performance of the critical external compressive resistance of this packaging composite film increases.But, adopt the hot sealing layer of poly-vinyl in the above-mentioned technology as packaging composite film, because poly hardness is big, intensity is high, and elasticity and compressive resistance are lower, and after the heat-sealing, it is still relatively poor that packaging bag enclosing place anti-falls withstand voltage properties.
Summary of the invention
Technical matters to be solved by this invention is: the composite film heat sealing strength that is used to make pack for liquids is low, and anti-to fall withstand voltage properties relatively poor, and then a kind of anti-liquid packaging composite film that falls good pressure-resistant performance and preparation method thereof is provided.
In order to solve the problems of the technologies described above; The invention provides a kind of liquid packaging composite film; Be disposed with from top to bottom and comprise top layer, barrier layer, enhancement layer and hot sealing layer; Said top layer is the polyethylene terephthalate rete through sided corona treatment; Said barrier layer is an aluminium foil layer, and said enhancement layer is the polyethylene terephthalate rete through sided corona treatment, and said hot sealing layer is made up of following material: the eight carbon line property low density polyethylene (LDPE)s of 40 ~ 60wt%, the polyvinyl acetate of 35 ~ 50wt%, the low density polyethylene (LDPE) of 5 ~ 10wt%.
Said hot sealing layer is through after said eight carbon line property low density polyethylene (LDPE)s, said polyvinyl acetate, said low density polyethylene (LDPE) are mixed, and prepares in 150 ~ 160 ℃ of following blow moldings.
Said skin depth is 12 ~ 20 μ m; Said barrier layer thickness is 7 ~ 20 μ m; The thickness of said enhancement layer is 12 ~ 20 μ m; Said hot sealing layer thickness is 60 ~ 120 μ m.
Said skin depth is 16 μ m; Said barrier layer thickness is 9 μ m; The thickness of said enhancement layer is 16 μ m; Said hot sealing layer thickness is 100 μ m.
Between said top layer and barrier layer, also be provided with printed layers.
The present invention also provides a kind of preparation method of said liquid packaging composite film, comprises the steps:
(1) on the surface of said barrier layer, applies adhesive, it is dried or natural cooling, make said adhesive on said barrier layer, solidify to form the first gluing layer; Under 60 ~ 70 ℃, top layer and the said first gluing layer hot pressing are combined with each other; Another side at said barrier layer applies adhesive, and it is dried or natural cooling, makes said adhesive on the another side of said barrier layer, solidify to form the second gluing layer; Under 60 ~ 70 ℃, enhancement layer and the said second gluing layer hot pressing are combined with each other; At the surface coating adhesive of said enhancement layer, it is dried or natural cooling, form the 3rd gluing layer; Under 60 ~ 70 ℃, hot sealing layer and said the 3rd gluing layer hot pressing are combined with each other, obtain the base film;
(2) the base film that obtains in the step (1) is carried out slaking under 45 ~ 55 ℃, curing time >=48h obtains liquid packaging composite film.
Before said top layer and said barrier layer are carried out hot pressing, earlier the one side of said top layer and said barrier layer hot pressing is printed the formation printed layers.
The temperature of said oven dry is 40 ~ 80 ℃.
The present invention compared with prior art has following advantage:
(1) liquid packaging composite film according to the invention; Be disposed with top layer, barrier layer, enhancement layer and hot sealing layer from top to bottom; Wherein said hot sealing layer is made up of the eight carbon line property low density polyethylene (LDPE)s of 40 ~ 60wt%, the polyvinyl acetate of 35 ~ 50wt%, the low density polyethylene (LDPE) of 5 ~ 10wt%; Said eight carbon line property low density polyethylene (LDPE)s have certain elasticity, intensity is higher and toughness is also better; After polyvinyl acetate, low density polyethylene (LDPE) are mated use; Has good compatibility between the three, the advantage of the high resiliency that three's coordinated effect can make hot sealing layer have eight carbon line property low density polyethylene (LDPE)s or polyvinyl acetate or low density polyethylene (LDPE) all not have, high-flexibility and outstanding resisting environmental stress and cracking and high heat seal strength.And be that the content of 40 ~ 60wt%, polyvinyl acetate is that the content of 35 ~ 50wt% and low density polyethylene (LDPE) is when being 5 ~ 10wt% through the content of eight carbon line property low density polyethylene (LDPE)s in the control hot sealing layer; Can make hot sealing layer have the excellent anti-withstand voltage properties that falls; Anti-ly fall test and be presented at the 10m eminence and fall to the cement flooring and once do not break; The withstand voltage properties test shows when static pressure pressure is 20MPa, 24 hours no leaks.
(2) liquid packaging composite film of the present invention further defines the thickness of top layer, barrier layer, enhancement layer and hot sealing layer, the thickness of each rete mainly influence layer with layer between adhesion firmness.Thickness on top layer according to the invention is that 12 ~ 20 μ m, said barrier layer thickness are 7 ~ 20 μ m; The thickness of said enhancement layer is 12 ~ 20 μ m; When said hot sealing layer thickness is 60 ~ 120 μ m, the liquid packaging composite film for preparing, the adhesion firmness between each layer is very high, can not produce the phenomenon of layering or splitting.Preferred said skin depth is 12 μ m and work as further; Said barrier layer thickness is 9 μ m; The thickness of said enhancement layer is 12 μ m; When said hot sealing layer thickness is 100 μ m, have best adhesion firmness between each layer of liquid packaging composite film for preparing, and through still not producing the phenomenon of layering or splitting after the long-term use between each layer.
(3) preparation method of liquid packaging composite film according to the invention, compound through top layer, barrier layer, enhancement layer and hot sealing layer are passed through 60 ~ 70 ℃ of following hot pressing, prepare the base film, and then the base film is carried out maturation process, promptly obtain liquid packaging composite film.In preparation method according to the invention, define the compound temperature of hot pressing, under this temperature, top layer, barrier layer, enhancement layer and hot sealing layer can well be bonded to together, and can not produce lamination.
The specific embodiment
Below in conjunction with embodiment, the present invention is made further specific descriptions, but be not limited to this.
Embodiment 1
A kind of liquid packaging composite film; Comprise top layer, barrier layer, enhancement layer and hot sealing layer; Said top layer is the polyethylene terephthalate rete through sided corona treatment, and said barrier layer is an aluminium foil layer, and said enhancement layer is the polyethylene terephthalate rete through sided corona treatment; Said hot sealing layer is made up of following materials in weight portion, the eight carbon line property low density polyethylene (LDPE)s of 40wt%, the polyvinyl acetate of 50wt%, the low density polyethylene (LDPE) of 10wt%.
Hot sealing layer described in the present embodiment is through after said eight carbon line property low density polyethylene (LDPE)s, said polyvinyl acetate, said low density polyethylene (LDPE) are mixed, and prepares in 150 ℃ of following blow moldings.
The preparation method of liquid packaging composite film described in the present embodiment is following:
(1) on the surface of said barrier layer, applies adhesive, it is dried under 30 ℃, make said adhesive on said barrier layer, solidify to form the first gluing layer; Under 60 ℃, top layer and the said first gluing layer hot pressing are combined with each other; Another side at said barrier layer applies adhesive, and it is dried under 30 ℃, makes said adhesive on the another side of said barrier layer, solidify to form the second gluing layer; Under 60 ℃, enhancement layer and the said second gluing layer hot pressing are combined with each other; At the surface coating adhesive of said enhancement layer, it is dried under 30 ℃, form the 3rd gluing layer; Under 60 ℃, hot sealing layer and said the 3rd gluing layer hot pressing are combined with each other, obtain the base film;
(2) the base film that obtains in the step (1) is carried out slaking under 45 ℃, the curing time is 48h, obtains liquid packaging composite film.
Embodiment 2
A kind of liquid packaging composite film; Comprise top layer, barrier layer, enhancement layer and hot sealing layer; Said top layer is the polyethylene terephthalate rete after sided corona treatment, and said barrier layer is an aluminium foil layer, and said enhancement layer is the polyethylene terephthalate rete after sided corona treatment; Said hot sealing layer is made up of following materials in weight portion, the eight carbon line property low density polyethylene (LDPE)s of 50wt%, the polyvinyl acetate of 42wt%, the low density polyethylene (LDPE) of 8wt%.
Hot sealing layer described in the present embodiment is through after said eight carbon line property low density polyethylene (LDPE)s, said polyvinyl acetate, said low density polyethylene (LDPE) are mixed, and prepares in 155 ℃ of following blow moldings.
The preparation method of liquid packaging composite film described in the present embodiment is following:
(1) on the surface of said barrier layer, applies adhesive, it is dried under 40 ℃, make said adhesive on said barrier layer, solidify to form the first gluing layer; Under 65 ℃, top layer and the said first gluing layer hot pressing are combined with each other; Another side at said barrier layer applies adhesive, and it is dried under 40 ℃, makes said adhesive on the another side of said barrier layer, solidify to form the second gluing layer; Under 65 ℃, enhancement layer and the said second gluing layer hot pressing are combined with each other; At the surface coating adhesive of said enhancement layer, it is dried under 40 ℃, form the 3rd gluing layer; Under 65 ℃, hot sealing layer and said the 3rd gluing layer hot pressing are combined with each other, obtain the base film;
(2) the base film that obtains in the step (1) is carried out slaking under 50 ℃, the curing time is 50h, obtains liquid packaging composite film.
Embodiment 3
A kind of liquid packaging composite film; Comprise top layer, barrier layer, enhancement layer and hot sealing layer; Said top layer is the polyethylene terephthalate rete after sided corona treatment, and said barrier layer is an aluminium foil layer, and said enhancement layer is the polyethylene terephthalate rete after sided corona treatment; Said hot sealing layer is made up of following materials in weight portion, the eight carbon line property low density polyethylene (LDPE)s of 60wt%, the polyvinyl acetate of 35wt%, the low density polyethylene (LDPE) of 5wt%.
Hot sealing layer described in the present embodiment is through after said eight carbon line property low density polyethylene (LDPE)s, said polyvinyl acetate, said low density polyethylene (LDPE) are mixed, and prepares in 160 ℃ of following blow moldings.
The preparation method of liquid packaging composite film described in the present embodiment is following:
(1) on the surface of said barrier layer, applies adhesive, it is dried under 50 ℃, make said adhesive on said barrier layer, solidify to form the first gluing layer; Under 70 ℃, top layer and the said first gluing layer hot pressing are combined with each other; Another side at said barrier layer applies adhesive, and it is dried under 50 ℃, makes said adhesive on the another side of said barrier layer, solidify to form the second gluing layer; Under 70 ℃, enhancement layer and the said second gluing layer hot pressing are combined with each other; At the surface coating adhesive of said enhancement layer, it is dried under 50 ℃, form the 3rd gluing layer; Under 70 ℃, hot sealing layer and said the 3rd gluing layer hot pressing are combined with each other, obtain the base film;
(2) the base film that obtains in the step (1) is carried out slaking under 55 ℃, the curing time is 55h, obtains liquid packaging composite film.
Embodiment 4
A kind of liquid packaging composite film; The top layer that comprises, barrier layer, enhancement layer and hot sealing layer; Between said top layer and said barrier layer, be provided with printed layers, said top layer is that thickness is the polyethylene terephthalate rete after sided corona treatment of 12 μ m, and said barrier layer is that thickness is the aluminium foil layer of 7 μ m; Said enhancement layer is that thickness is the polyethylene terephthalate rete after sided corona treatment of 12 μ m; Said hot sealing layer is that thickness is the hot sealing layer of 60 μ m, and said hot sealing layer is made up of following materials in weight portion, the eight carbon line property low density polyethylene (LDPE)s of 45wt%, the polyvinyl acetate of 47wt%, the low density polyethylene (LDPE) of 8wt%.
Hot sealing layer described in the present embodiment is through after said eight carbon line property low density polyethylene (LDPE)s, said polyvinyl acetate, said low density polyethylene (LDPE) are mixed, and prepares in 150 ℃ of following blow moldings.
The preparation method of liquid packaging composite film described in the present embodiment is following:
(1) on the surface of said barrier layer, applies adhesive, it is dried under 60 ℃, make said adhesive on said barrier layer, solidify to form the first gluing layer; Under 60 ℃, top layer and the said first gluing layer hot pressing are combined with each other; Another side at said barrier layer applies adhesive, and it is dried under 60 ℃, makes said adhesive on the another side of said barrier layer, solidify to form the second gluing layer; Under 60 ℃, enhancement layer and the said second gluing layer hot pressing are combined with each other; At the surface coating adhesive of said enhancement layer, it is dried under 60 ℃, form the 3rd gluing layer; Under 60 ℃, hot sealing layer and said the 3rd gluing layer hot pressing are combined with each other, obtain the base film;
(2) the base film that obtains in the step (1) is carried out slaking under 45 ℃, the curing time is 60h, obtains liquid packaging composite film.
Embodiment 5
A kind of liquid packaging composite film; The top layer that comprises, barrier layer, enhancement layer and hot sealing layer; Said top layer is that thickness is the polyethylene terephthalate rete after sided corona treatment of 14 μ m; Said barrier layer is that thickness is the aluminium foil layer of 10 μ m, and said enhancement layer is that thickness is the polyethylene terephthalate rete after sided corona treatment of 14 μ m, and said hot sealing layer is that thickness is the hot sealing layer of 80 μ m; Said hot sealing layer is made up of following materials in weight portion, the eight carbon line property low density polyethylene (LDPE)s of 55wt%, the polyvinyl acetate of 39wt%, the low density polyethylene (LDPE) of 6wt%.
Hot sealing layer described in the present embodiment is through after said eight carbon line property low density polyethylene (LDPE)s, said polyvinyl acetate, said low density polyethylene (LDPE) are mixed, and prepares in 160 ℃ of following blow moldings.
The preparation method of liquid packaging composite film described in the present embodiment is following:
(1) on the surface of said barrier layer, applies adhesive, it is dried under 70 ℃, make said adhesive on said barrier layer, solidify to form the first gluing layer; Under 65 ℃, top layer and the said first gluing layer hot pressing are combined with each other; Another side at said barrier layer applies adhesive, and it is dried under 70 ℃, makes said adhesive on the another side of said barrier layer, solidify to form the second gluing layer; Under 65 ℃, enhancement layer and the said second gluing layer hot pressing are combined with each other; At the surface coating adhesive of said enhancement layer, it is dried under 70 ℃, form the 3rd gluing layer; Under 65 ℃, hot sealing layer and said the 3rd gluing layer hot pressing are combined with each other, obtain the base film;
(2) the base film that obtains in the step (1) is carried out slaking under 50 ℃, the curing time is 60h, obtains liquid packaging composite film.
Embodiment 6
A kind of liquid packaging composite film; The top layer that comprises, barrier layer, enhancement layer and hot sealing layer; Between said top layer and said barrier layer, be provided with printed layers, said top layer is that thickness is the polyethylene terephthalate rete after sided corona treatment of 15 μ m, and said barrier layer is that thickness is the aluminium foil layer of 13 μ m; Said enhancement layer is that thickness is the polyethylene terephthalate rete after sided corona treatment of 15 μ m; Said hot sealing layer is that thickness is the hot sealing layer of 95 μ m, and said hot sealing layer is made up of following materials in weight portion, the eight carbon line property low density polyethylene (LDPE)s of 48wt%, the polyvinyl acetate of 45wt%, the low density polyethylene (LDPE) of 7wt%.
Hot sealing layer described in the present embodiment is through after said eight carbon line property low density polyethylene (LDPE)s, said polyvinyl acetate, said low density polyethylene (LDPE) are mixed, and prepares in 160 ℃ of following blow moldings.
The preparation method of liquid packaging composite film described in the present embodiment is following:
(1) on the surface of said barrier layer, applies adhesive, it is dried under 80 ℃, make said adhesive on said barrier layer, solidify to form the first gluing layer; Under 70 ℃, top layer and the said first gluing layer hot pressing are combined with each other; Another side at said barrier layer applies adhesive, and it is dried under 80 ℃, makes said adhesive on the another side of said barrier layer, solidify to form the second gluing layer; Under 60 ℃, enhancement layer and the said second gluing layer hot pressing are combined with each other; At the surface coating adhesive of said enhancement layer, it is dried under 80 ℃, form the 3rd gluing layer; Under 70 ℃, hot sealing layer and said the 3rd gluing layer hot pressing are combined with each other, obtain the base film;
(2) the base film that obtains in the step (1) is carried out slaking under 55 ℃, the curing time is 70h, obtains liquid packaging composite film.
Embodiment 7
A kind of liquid packaging composite film; The top layer that comprises, barrier layer, enhancement layer and hot sealing layer; Between said top layer and said barrier layer, be provided with printed layers, said top layer is that thickness is the polyethylene terephthalate rete after sided corona treatment of 16 μ m, and said barrier layer is that thickness is the aluminium foil layer of 9 μ m; Said enhancement layer is that thickness is the polyethylene terephthalate rete after sided corona treatment of 16 μ m; Said hot sealing layer is that thickness is the hot sealing layer of 100 μ m, and said hot sealing layer is made up of following materials in weight portion, the eight carbon line property low density polyethylene (LDPE)s of 60wt%, the polyvinyl acetate of 35wt%, the low density polyethylene (LDPE) of 5wt%.
Hot sealing layer described in the present embodiment is through after said eight carbon line property low density polyethylene (LDPE)s, said polyvinyl acetate, said low density polyethylene (LDPE) are mixed, and prepares in 155 ℃ of following blow moldings.
The preparation method of liquid packaging composite film described in the present embodiment is following:
(1) on the surface of said barrier layer, applies adhesive, it is dried under 55 ℃, make said adhesive on said barrier layer, solidify to form the first gluing layer; Under 65 ℃, top layer and the said first gluing layer hot pressing are combined with each other; Another side at said barrier layer applies adhesive, and it is dried under 55 ℃, makes said adhesive on the another side of said barrier layer, solidify to form the second gluing layer; Under 65 ℃, enhancement layer and the said second gluing layer hot pressing are combined with each other; At the surface coating adhesive of said enhancement layer, it is dried under 55 ℃, form the 3rd gluing layer; Under 65 ℃, hot sealing layer and said the 3rd gluing layer hot pressing are combined with each other, obtain the base film;
(2) the base film that obtains in the step (1) is carried out slaking under 50 ℃, the curing time is 55h, obtains liquid packaging composite film.
Embodiment 8
A kind of liquid packaging composite film; The top layer that comprises, barrier layer, enhancement layer and hot sealing layer; Between said top layer and said barrier layer, be provided with printed layers, said top layer is that thickness is the polyethylene terephthalate rete after sided corona treatment of 18 μ m, and said barrier layer is that thickness is the aluminium foil layer of 8 μ m; Said enhancement layer is that thickness is the polyethylene terephthalate rete after sided corona treatment of 18 μ m; Said hot sealing layer is that thickness is the hot sealing layer of 115 μ m, and said hot sealing layer is made up of following materials in weight portion, the eight carbon line property low density polyethylene (LDPE)s of 45wt%, the polyvinyl acetate of 50wt%, the low density polyethylene (LDPE) of 5wt%.
Hot sealing layer described in the present embodiment is through after said eight carbon line property low density polyethylene (LDPE)s, said polyvinyl acetate, said low density polyethylene (LDPE) are mixed, and prepares in 160 ℃ of following blow moldings.
The preparation method of liquid packaging composite film described in the present embodiment is following:
(1) on the surface of said barrier layer, applies adhesive, it is carried out natural cooling, make said adhesive on said barrier layer, solidify to form the first gluing layer; Under 70 ℃, top layer and the said first gluing layer hot pressing are combined with each other; Another side at said barrier layer applies adhesive, and it is carried out natural cooling, makes said adhesive on the another side of said barrier layer, solidify to form the second gluing layer; Under 70 ℃, enhancement layer and the said second gluing layer hot pressing are combined with each other; Surface coating adhesive at said enhancement layer carries out natural cooling to it, forms the 3rd gluing layer; Under 70 ℃, hot sealing layer and said the 3rd gluing layer hot pressing are combined with each other, obtain the base film;
(2) the base film that obtains in the step (1) is carried out slaking under 50 ℃, the curing time is 48h, obtains liquid packaging composite film.
Embodiment 9
A kind of liquid packaging composite film; The top layer that comprises, barrier layer, enhancement layer and hot sealing layer; Between said top layer and said barrier layer, be provided with printed layers, said top layer is that thickness is the polyethylene terephthalate rete after sided corona treatment of 20 μ m, and said barrier layer is that thickness is the aluminium foil layer of 20 μ m; Said enhancement layer is that thickness is the polyethylene terephthalate rete after sided corona treatment of 20 μ m; Said hot sealing layer is that thickness is the hot sealing layer of 120 μ m, and said hot sealing layer is made up of following materials in weight portion, the eight carbon line property low density polyethylene (LDPE)s of 40wt%, the polyvinyl acetate of 50wt%, the low density polyethylene (LDPE) of 10wt%.
Hot sealing layer described in the present embodiment is through after said eight carbon line property low density polyethylene (LDPE)s, said polyvinyl acetate, said low density polyethylene (LDPE) are mixed, and prepares in 150 ~ 160 ℃ of following blow moldings.
The preparation method of liquid packaging composite film described in the present embodiment is following:
(1) on the surface of said barrier layer, applies adhesive, it is dried under 65 ℃, make said adhesive on said barrier layer, solidify to form the first gluing layer; Under 60 ℃, top layer and the said first gluing layer hot pressing are combined with each other; Another side at said barrier layer applies adhesive, and it is dried under 65 ℃, makes said adhesive on the another side of said barrier layer, solidify to form the second gluing layer; Under 60 ℃, enhancement layer and the said second gluing layer hot pressing are combined with each other; At the surface coating adhesive of said enhancement layer, it is dried under 65 ℃, form the 3rd gluing layer; Under 60 ℃, hot sealing layer and said the 3rd gluing layer hot pressing are combined with each other, obtain the base film;
(2) the base film that obtains in the step (1) is carried out slaking under 55 ℃, the curing time is 55h, obtains liquid packaging composite film.
Eight carbon line property low density polyethylene (LDPE)s selection Dow Chemical model described in the foregoing description is 2045 eight carbon line property low density polyethylene (LDPE)s; VA (acetic acid) content is the polyvinyl acetate of 14wt% in the polyvinyl acetate selection polyvinyl acetate, and low density polyethylene (LDPE) selects complex film to prepare low density polyethylene (LDPE) commonly used in the process.
In liquid packaging composite film according to the invention; Said eight carbon line property low density polyethylene (LDPE)s and polyvinyl acetate also can be selected eight carbon line property low density polyethylene (LDPE) and polyvinyl acetate of other any manufacturer production except can using the material described in the foregoing description.
The anti-withstand voltage properties evaluation Example of falling
The foregoing description 1 to 9 said liquid packaging composite film is carried out the anti-withstand voltage properties test of falling, and test method and test result are following.
Test method:
The anti-performance test methods that falls: said complex film is sealed into the pouch of 100 ㎜ * 160 ㎜, interior dress 80ml water, the 10m eminence falls to the cement flooring and does not once break, and it is qualified to be.
The withstand voltage properties test method: said complex film is sealed into the pouch of 100 ㎜ * 160 ㎜, interior dress 80ml water, static pressure pressure: 20MPa, the time: it is qualified that 24 hours no leaks are.
Test result: embodiment 1 ~ 9 described liquid packaging composite film is tested through above-mentioned test method, and test result is all qualified, explains that this complex film has the splendid anti-withstand voltage properties that falls.
Comparative Examples
Withstand voltage packaging composite film comprises top layer, barrier layer and hot sealing layer, and first bonding coat is arranged between top layer and the barrier layer; Between barrier layer and the hot sealing layer enhancement Layer is arranged, second bonding coat is arranged between barrier layer and the enhancement Layer, the 3rd bonding coat is arranged between enhancement Layer and the hot sealing layer; Polyethylene terephthalate is adopted on said top layer; Said barrier layer adopts aluminium foil, and said enhancement Layer adopts polyethylene terephthalate, and said hot sealing layer adopts poly-vinyl.
Withstand voltage packaging composite film described in the above-mentioned Comparative Examples prepares according to disclosed withstand voltage packaging composite film among the Chinese patent document CN202072106U; Adopt above-mentioned test method to carry out the anti-withstand voltage properties test of falling to the withstand voltage packaging composite film in the Comparative Examples; The result shows the pouch of 100 ㎜ * 160 ㎜ that said withstand voltage packaging composite film seals; Interior dress 80ml water falls once on concrete floor in the 10m eminence, promptly breaks; Static pressure pressure 20MPa, 12h promptly leaks.Can know that by above-mentioned test result the anti-withstand voltage properties that falls of laminated film described in the Comparative Examples is significantly less than liquid packaging composite film according to the invention.
Obviously, the foregoing description only be for explanation clearly done for example, and be not qualification to embodiment.For the those of ordinary skill in affiliated field, on the basis of above-mentioned explanation, can also make other multi-form variation or change.Here need not also can't give to all embodiments exhaustive, and the conspicuous variation of being extended out thus or the change still be among the protection domain of the invention claim.

Claims (8)

1. liquid packaging composite film; Be disposed with top layer, barrier layer, enhancement layer and hot sealing layer from top to bottom; Said top layer is the polyethylene terephthalate rete through sided corona treatment, and said barrier layer is an aluminium foil layer, and said enhancement layer is the polyethylene terephthalate rete through sided corona treatment; It is characterized in that said hot sealing layer is made up of following material: the eight carbon line property low density polyethylene (LDPE)s of 40 ~ 60wt%, the polyvinyl acetate of 35 ~ 50wt%, the low density polyethylene (LDPE) of 5 ~ 10wt%.
2. according to the said liquid packaging composite film of claim 1; It is characterized in that; Said hot sealing layer is through after said eight carbon line property low density polyethylene (LDPE)s, said polyvinyl acetate, said low density polyethylene (LDPE) are mixed, and prepares in 150 ~ 160 ℃ of following blow moldings.
3. according to claim 1 or 2 said liquid packaging composite films, it is characterized in that said skin depth is 12 ~ 20 μ m; Said barrier layer thickness is 7 ~ 20 μ m; The thickness of said enhancement layer is 12 ~ 20 μ m; Said hot sealing layer thickness is 60 ~ 120 μ m.
4. according to the said liquid packaging composite film of claim 3, it is characterized in that said skin depth is 16 μ m; Said barrier layer thickness is 9 μ m; The thickness of said enhancement layer is 16 μ m; Said hot sealing layer thickness is 100 μ m.
5. according to the arbitrary said liquid packaging composite film of claim 1 ~ 4, it is characterized in that, between said top layer and barrier layer, also be provided with printed layers.
6. the preparation method of the arbitrary said liquid packaging composite film of claim 1 ~ 5 comprises the steps:
(1) on the surface of said barrier layer, applies adhesive, it is dried or natural cooling, make said adhesive on said barrier layer, solidify to form the first gluing layer; Under 60 ~ 70 ℃, top layer and the said first gluing layer hot pressing are combined with each other; Another side at said barrier layer applies adhesive, and it is dried or natural cooling, makes said adhesive on the another side of said barrier layer, solidify to form the second gluing layer; Under 60 ~ 70 ℃, enhancement layer and the said second gluing layer hot pressing are combined with each other; At the surface coating adhesive of said enhancement layer, it is dried or natural cooling, form the 3rd gluing layer; Under 60 ~ 70 ℃, hot sealing layer and said the 3rd gluing layer hot pressing are combined with each other, obtain the base film;
(2) the base film that obtains in the step (1) is carried out slaking under 45 ~ 55 ℃, curing time >=48h obtains liquid packaging composite film.
7. according to the preparation method of the said liquid packaging composite film of claim 6, it is characterized in that, before said top layer and said barrier layer are carried out hot pressing, earlier the one side of said top layer and said barrier layer hot pressing is printed, the formation printed layers.
8. according to the preparation method of claim 6 or 7 said liquid packaging composite films, its characteristic
Be that the temperature of said oven dry is 40 ~ 80 ℃.
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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103264840A (en) * 2013-06-07 2013-08-28 浙江金石包装有限公司 Aluminum foil openable cover and preparation method thereof
CN105328949A (en) * 2015-12-15 2016-02-17 常熟市众友包装材料有限公司 High-barrier liquid packaging material
CN105479881A (en) * 2015-12-15 2016-04-13 常熟市众友包装材料有限公司 Method for preparing high-barrier packing material
CN108995341A (en) * 2018-08-15 2018-12-14 江阴宝柏包装有限公司 A kind of high-barrier high-strength composite packaging film and preparation method thereof
CN108995340A (en) * 2018-07-27 2018-12-14 黄山永新股份有限公司 A kind of high-barrier liquid detergent packaging bag and preparation method thereof
CN110254043A (en) * 2019-07-22 2019-09-20 郑州都中印务有限公司 A kind of printing process of Aluminum-plastic composite bag printing machine and Aluminum-plastic composite bag

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2250028A1 (en) * 1996-04-12 1997-10-23 Danisco A/S A multilayered packaging material, in particular for flexible packagings
WO2000016975A1 (en) * 1998-09-22 2000-03-30 Flex Pack International (Holdings) Limited A process for the production of a laminated film
CN1628965A (en) * 2003-12-15 2005-06-22 大日本印刷株式会社 Laminated material for container and paper container using the laminated material
CN1910045A (en) * 2004-01-13 2007-02-07 旭硝子株式会社 Multilayer laminate
JP3898303B2 (en) * 1997-10-16 2007-03-28 大日本印刷株式会社 Heat-sealing lid with light shielding
CN101665174A (en) * 2009-10-21 2010-03-10 浙江金石包装有限公司 Hot melt adhesive aluminum foil sealing film and manufacturing method thereof
CN101787156A (en) * 2009-01-23 2010-07-28 谘优生医智财股份有限公司 Preparation method of environmental protection type biodegradable plastic additive with enhanced physical property
CN202072106U (en) * 2011-03-19 2011-12-14 金石包装(嘉兴)有限公司 Overpressure resistant packaging composite film

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2250028A1 (en) * 1996-04-12 1997-10-23 Danisco A/S A multilayered packaging material, in particular for flexible packagings
JP3898303B2 (en) * 1997-10-16 2007-03-28 大日本印刷株式会社 Heat-sealing lid with light shielding
WO2000016975A1 (en) * 1998-09-22 2000-03-30 Flex Pack International (Holdings) Limited A process for the production of a laminated film
CN1628965A (en) * 2003-12-15 2005-06-22 大日本印刷株式会社 Laminated material for container and paper container using the laminated material
CN1910045A (en) * 2004-01-13 2007-02-07 旭硝子株式会社 Multilayer laminate
CN101787156A (en) * 2009-01-23 2010-07-28 谘优生医智财股份有限公司 Preparation method of environmental protection type biodegradable plastic additive with enhanced physical property
CN101665174A (en) * 2009-10-21 2010-03-10 浙江金石包装有限公司 Hot melt adhesive aluminum foil sealing film and manufacturing method thereof
CN202072106U (en) * 2011-03-19 2011-12-14 金石包装(嘉兴)有限公司 Overpressure resistant packaging composite film

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
方震宇: "复合软包装热封层材料的探讨", 《中国包装报》 *

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103264840A (en) * 2013-06-07 2013-08-28 浙江金石包装有限公司 Aluminum foil openable cover and preparation method thereof
CN103264840B (en) * 2013-06-07 2015-09-23 浙江金石包装有限公司 A kind of aluminum foil openable cover and preparation method thereof
CN105328949A (en) * 2015-12-15 2016-02-17 常熟市众友包装材料有限公司 High-barrier liquid packaging material
CN105479881A (en) * 2015-12-15 2016-04-13 常熟市众友包装材料有限公司 Method for preparing high-barrier packing material
CN108995340A (en) * 2018-07-27 2018-12-14 黄山永新股份有限公司 A kind of high-barrier liquid detergent packaging bag and preparation method thereof
CN108995341A (en) * 2018-08-15 2018-12-14 江阴宝柏包装有限公司 A kind of high-barrier high-strength composite packaging film and preparation method thereof
CN110254043A (en) * 2019-07-22 2019-09-20 郑州都中印务有限公司 A kind of printing process of Aluminum-plastic composite bag printing machine and Aluminum-plastic composite bag
CN110254043B (en) * 2019-07-22 2021-04-02 郑州都中印务有限公司 Aluminum-plastic composite bag printing machine and printing method of aluminum-plastic composite bag

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