CN106273970A - Biaxially oriented polypropylene heat-sealing film that a kind of coefficient of friction is low and preparation method thereof - Google Patents
Biaxially oriented polypropylene heat-sealing film that a kind of coefficient of friction is low and preparation method thereof Download PDFInfo
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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
- B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D7/00—Producing flat articles, e.g. films or sheets
- B29D7/01—Films or sheets
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/10—Homopolymers or copolymers of propene
- C08L23/12—Polypropene
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/10—Homopolymers or copolymers of propene
- C08L23/14—Copolymers of propene
-
- 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
- B32B2439/00—Containers; Receptacles
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/16—Applications used for films
- C08L2203/162—Applications used for films sealable films
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
Abstract
The invention discloses the Biaxially oriented polypropylene heat-sealing film that a kind of coefficient of friction is low, be made up of the upper, middle and lower the most successively；Described upper strata is made up of according to the raw material of weight portion following: COPP, politef, polyimides, tristerin, nano aluminium oxide, fluorosilicone；Described middle level is made up of according to the raw material of weight portion following: HOPP, high density polyethylene (HDPE), ethoxylated amine, sorbitol ester；Described lower floor is made up of according to the raw material of weight portion following: ternary polymerized polypropylene, polyvinylidene fluoride, butyl stearate, precipitated silica.The invention also discloses the preparation method of the low Biaxially oriented polypropylene heat-sealing film of described coefficient of friction.It is low that the present invention prepares heat-sealing film coefficient of friction, it is possible to meets the demand of existing high-speed packaging machine, has huge market price person and social value.
Description
Technical field
The present invention relates to heat-sealing film production technical field, the Biaxially oriented polypropylene heat-sealing that a kind of coefficient of friction is low
Film and preparation method thereof.
Background technology
Bidirectional stretching polypropylene film (BOPP) is generally multilamellar mutual aid thin film, is to be formed sheet by PP GRANULES through co-extrusion
After material, then prepare through the stretching of both direction in length and breadth.Bidirectional stretching polypropylene film have light weight, nontoxic, odorless, protection against the tide,
The advantages such as mechanical strength is high, and good stability of the dimension, printing performance are good, the transparency is good.There is the high grade of transparency, good luster, obstruct
Property is good, shock strength is high, the advantage such as low temperature resistant, is widely used in food, confection, medicated cigarette, Folium Camelliae sinensis, fruit juice, milk, textile etc.
Packaging, have the laudatory title of " packaging queen ".
Along with industrialization development, cost and benefit is pursued by factory, produces packaging facilities speed increasingly faster, such as cigarette package
Machine commonly use packaging speed 350-400 bag/point, the packer speed 800 of existing new clothes wraps/point, this just requires wrapping thin film also
Device rate to be caught up with, device rate to be caught up with, the coefficient of friction of film is one of important parameter, it require coefficient of friction the least more
Good.Patent application CN200810244355 discloses a kind of low-friction coefficient polypropylene film, and it is by adding conjunction in the feed
Silicon stone is become to make its skin-friction coefficient≤0.2；But, the coefficient of friction of such scope is still difficult to meet the need that ultrahigh speed produces
Ask.The Chinese patent of Application No. 201210569786.X discloses a kind of low friction Biaxially oriented polypropylene heat-sealing film and
Manufacture method, its coefficient of friction has reached 0.12-0.15, it is possible to tentatively meet the demand of part high-speed packaging machine.Need on market
Seek the Biaxially oriented polypropylene heat-sealing film that coefficient of friction is lower.
Summary of the invention
It is an object of the invention to provide low Biaxially oriented polypropylene heat-sealing film of a kind of coefficient of friction and preparation method thereof,
With the problem solving to propose in above-mentioned background technology.
For achieving the above object, the present invention provides following technical scheme:
The Biaxially oriented polypropylene heat-sealing film that a kind of coefficient of friction is low, the most successively by the upper, middle and lower group
Become；Described upper strata is made up of according to the raw material of weight portion following: COPP 83-86 part, politef 12-15 part, poly-
Acid imide 0.6-1.0 part, tristerin 1-3 part, nano aluminium oxide 0.4-0.8 part, fluorosilicone 0.2-0.5 part；Described
Middle level is made up of according to the raw material of weight portion following: HOPP 92-95 part, high density polyethylene (HDPE) 5-9 part, ethoxylated amine
1-2 part, sorbitol ester 0.8-1.2 part；Described lower floor is made up of according to the raw material of weight portion following: ternary polymerized polypropylene
88-93 part, polyvinylidene fluoride 9-12 part, butyl stearate 1.5-3 part, precipitated silica 0.6-0.9 part.
As the further scheme of the present invention: described upper strata is made up of according to the raw material of weight portion following: COPP
84-85 part, politef 13-14 part, polyimides 0.7-0.9 part, tristerin 1.3-2.8 part, nano aluminium oxide
0.5-0.7 part, fluorosilicone 0.3-0.4 part；Described middle level is made up of according to the raw material of weight portion following: HOPP 93-
94 parts, high density polyethylene (HDPE) 6-8 part, ethoxylated amine 1.3-1.8 part, sorbitol ester 0.9-1.1 part；Described lower floor is by following
Form according to the raw material of weight portion: ternary polymerized polypropylene 89-92 part, polyvinylidene fluoride 10-11 part, butyl stearate 1.8-
2.7 parts, precipitated silica 0.7-0.8 part.
As the present invention further scheme: described upper strata is made up of according to the raw material of weight portion following: copolymerization poly-third
85 parts of alkene, politef 13 parts, polyimides 0.8 part, tristerin 2.1 parts, nano aluminium oxide 0.6 part, fluorine silica
0.3 part of alkane；Described middle level is made up of according to the raw material of weight portion following: HOPP 93 parts, high density polyethylene (HDPE) 7 parts, second
Epoxide amine 1.5 parts, sorbitol ester 1 part；Described lower floor is made up of according to the raw material of weight portion following: ternary polymerized polypropylene
91 parts, polyvinylidene fluoride 10.6 parts, butyl stearate 2.3 parts, precipitated silica 0.7 part.
As the present invention further scheme: the thickness on described upper strata is 1.8-2.5 μm, the thickness in middle level is 18-25 μ
M, the thickness of lower floor is 2.0-3.2 μm.
The preparation method of the Biaxially oriented polypropylene heat-sealing film that described coefficient of friction is low, step is as follows:
1) dispensing: weigh the raw material of the upper, middle and lower in proportion, and put into different batch cans, carry out batch mixing；
2) extrusion: middle level raw material flows into double screw extruder or single screw rod tandem extruder after batch mixing, upper layer material with
Lower layered material flows into respective subsidiary extruder after batch mixing, and three layered materials flow out after die head converges, extruder temperature: 260-270
℃；
3) slab: the resin that extruder die head flows out is cooled to sheet material, makes the degree of crystallinity of resin, crystal habit, crystal
Size reach perfect condition, to improve the physical property of thin film, slab machine chilling temperature: 20-25 DEG C；
4) longitudinal stretching: the sheet material come from slab machine is preheated, and under certain speed, sheet material is longitudinally drawn
Long, make polymer molecule carry out machine-direction oriented, preheating temperature is: 128-135 DEG C, draft temperature be: 130-140 DEG C, stretching times
Rate is: 450-500%；
5) cross directional stretch: the chain guide that the sheet material crossed by longitudinal stretching passes through to set is in the stretching having the bigger angle of flare
District carries out cross directional stretch, makes polymer molecule at horizontal orientation equally, preheats temperature most preferably: 146-155 DEG C, draft temperature
For: 150-160 DEG C, setting temperature be: 115-120 DEG C, stretching ratio be: 850-950%；
6) rolling: the horizontal thin film pulled out carries out rolling through winder after trimming again；
7) Ageing Treatment: the thin film after rolling is carried out Ageing Treatment, it is thus achieved that finished product.
Compared with prior art, the invention has the beneficial effects as follows:
The Biaxially oriented polypropylene heat-sealing film that coefficient of friction prepared by the present invention is low, its coefficient of friction is 0.09-0.11, energy
Enough meet the demand of existing high-speed packaging machine, there is huge market price person and social value.The present invention prepares coefficient of friction
The preparation method of low Biaxially oriented polypropylene heat-sealing film, its technique is simple, it is possible to large-scale industrial production.
Detailed description of the invention
Below in conjunction with detailed description of the invention, technical scheme is described in more detail.
Embodiment 1
The Biaxially oriented polypropylene heat-sealing film that a kind of coefficient of friction is low, the most successively by the upper, middle and lower group
Become；Described upper strata is made up of according to the raw material of weight portion following: COPP 83 parts, politef 12 parts, polyimides
0.6 part, tristerin 1 part, nano aluminium oxide 0.4 part, fluorosilicone 0.2 part；Described middle level by following according to weight portion
Raw material composition: HOPP 92 parts, high density polyethylene (HDPE) 5 parts, ethoxylated amine 1 part, sorbitol ester 0.8 part；Described
Lower floor is made up of according to the raw material of weight portion following: ternary polymerized polypropylene 88 parts, polyvinylidene fluoride 9 parts, butyl stearate
1.5 parts, precipitated silica 0.6 part；The thickness on described upper strata is 1.8 μm, and the thickness in middle level is 18 μm, and the thickness of lower floor is
2.0μm。
The preparation method of the Biaxially oriented polypropylene heat-sealing film that coefficient of friction described in the present embodiment is low, step is as follows:
1) dispensing: weigh the raw material of the upper, middle and lower in proportion, and put into different batch cans, carry out batch mixing；
2) extrusion: middle level raw material flows into double screw extruder or single screw rod tandem extruder after batch mixing, upper layer material with
Lower layered material flows into respective subsidiary extruder after batch mixing, and three layered materials flow out after die head converges, extruder temperature: 260 DEG C；
3) slab: the resin that extruder die head flows out is cooled to sheet material, makes the degree of crystallinity of resin, crystal habit, crystal
Size reach perfect condition, to improve the physical property of thin film, slab machine chilling temperature: 20 DEG C；
4) longitudinal stretching: the sheet material come from slab machine is preheated, and under certain speed, sheet material is longitudinally drawn
Long, make polymer molecule carry out machine-direction oriented, preheating temperature is: 128 DEG C, draft temperature be: 130 DEG C, stretching ratio be:
450%；
5) cross directional stretch: the chain guide that the sheet material crossed by longitudinal stretching passes through to set is in the stretching having the bigger angle of flare
District carries out cross directional stretch, make equally polymer molecule at horizontal orientation, preheating temperature most preferably: 146 DEG C, draft temperature be: 150
DEG C, setting temperature be: 115 DEG C, stretching ratio be: 850%；
6) rolling: the horizontal thin film pulled out carries out rolling through winder after trimming again；
7) Ageing Treatment: the thin film after rolling is carried out Ageing Treatment, it is thus achieved that finished product.
Embodiment 2
The Biaxially oriented polypropylene heat-sealing film that a kind of coefficient of friction is low, the most successively by the upper, middle and lower group
Become；Described upper strata is made up of according to the raw material of weight portion following: COPP 84 parts, politef 13 parts, polyimides
0.7 part, tristerin 2.5 parts, nano aluminium oxide 0.8 part, fluorosilicone 0.3 part；Described middle level by following according to weight
The raw material composition of part: HOPP 93 parts, high density polyethylene (HDPE) 6 parts, ethoxylated amine 1.3 parts, sorbitol ester 1 part；Institute
State lower floor to be made up of according to the raw material of weight portion following: ternary polymerized polypropylene 89 parts, polyvinylidene fluoride 10 parts, stearic acid fourth
Ester 2.5 parts, precipitated silica 0.9 part；The thickness on described upper strata is 2 μm, and the thickness in middle level is 20 μm, and the thickness of lower floor is
2.5μm。
The preparation method of the Biaxially oriented polypropylene heat-sealing film that coefficient of friction described in the present embodiment is low, step is as follows:
1) dispensing: weigh the raw material of the upper, middle and lower in proportion, and put into different batch cans, carry out batch mixing；
2) extrusion: middle level raw material flows into double screw extruder or single screw rod tandem extruder after batch mixing, upper layer material with
Lower layered material flows into respective subsidiary extruder after batch mixing, and three layered materials flow out after die head converges, extruder temperature: 263 DEG C；
3) slab: the resin that extruder die head flows out is cooled to sheet material, makes the degree of crystallinity of resin, crystal habit, crystal
Size reach perfect condition, to improve the physical property of thin film, slab machine chilling temperature: 21 DEG C；
4) longitudinal stretching: the sheet material come from slab machine is preheated, and under certain speed, sheet material is longitudinally drawn
Long, make polymer molecule carry out machine-direction oriented, preheating temperature is: 129 DEG C, draft temperature be: 132 DEG C, stretching ratio be:
470%；
5) cross directional stretch: the chain guide that the sheet material crossed by longitudinal stretching passes through to set is in the stretching having the bigger angle of flare
District carries out cross directional stretch, make equally polymer molecule at horizontal orientation, preheating temperature most preferably: 149 DEG C, draft temperature be: 155
DEG C, setting temperature be: 116 DEG C, stretching ratio be: 860%；
6) rolling: the horizontal thin film pulled out carries out rolling through winder after trimming again；
7) Ageing Treatment: the thin film after rolling is carried out Ageing Treatment, it is thus achieved that finished product.
Embodiment 3
The Biaxially oriented polypropylene heat-sealing film that a kind of coefficient of friction is low, the most successively by the upper, middle and lower group
Become；Described upper strata is made up of according to the raw material of weight portion following: COPP 85 parts, politef 13 parts, polyimides
0.8 part, tristerin 2.1 parts, nano aluminium oxide 0.6 part, fluorosilicone 0.3 part；Described middle level by following according to weight
The raw material composition of part: HOPP 93 parts, high density polyethylene (HDPE) 7 parts, ethoxylated amine 1.5 parts, sorbitol ester 1 part；Institute
State lower floor to be made up of according to the raw material of weight portion following: ternary polymerized polypropylene 91 parts, polyvinylidene fluoride 10.6 parts, stearic acid
Butyl ester 2.3 parts, precipitated silica 0.7 part；The thickness on described upper strata is 2.1 μm, and the thickness in middle level is 22 μm, the thickness of lower floor
It is 2.6 μm.
The preparation method of the Biaxially oriented polypropylene heat-sealing film that coefficient of friction described in the present embodiment is low, step is as follows:
1) dispensing: weigh the raw material of the upper, middle and lower in proportion, and put into different batch cans, carry out batch mixing；
2) extrusion: middle level raw material flows into double screw extruder or single screw rod tandem extruder after batch mixing, upper layer material with
Lower layered material flows into respective subsidiary extruder after batch mixing, and three layered materials flow out after die head converges, extruder temperature: 265 DEG C；
3) slab: the resin that extruder die head flows out is cooled to sheet material, makes the degree of crystallinity of resin, crystal habit, crystal
Size reach perfect condition, to improve the physical property of thin film, slab machine chilling temperature: 23 DEG C；
4) longitudinal stretching: the sheet material come from slab machine is preheated, and under certain speed, sheet material is longitudinally drawn
Long, make polymer molecule carry out machine-direction oriented, preheating temperature is: 131 DEG C, draft temperature be: 135 DEG C, stretching ratio be:
480%；
5) cross directional stretch: the chain guide that the sheet material crossed by longitudinal stretching passes through to set is in the stretching having the bigger angle of flare
District carries out cross directional stretch, make equally polymer molecule at horizontal orientation, preheating temperature most preferably: 150 DEG C, draft temperature be: 155
DEG C, setting temperature be: 118 DEG C, stretching ratio be: 900%；
6) rolling: the horizontal thin film pulled out carries out rolling through winder after trimming again；
7) Ageing Treatment: the thin film after rolling is carried out Ageing Treatment, it is thus achieved that finished product.
Embodiment 4
The Biaxially oriented polypropylene heat-sealing film that a kind of coefficient of friction is low, the most successively by the upper, middle and lower group
Become；Described upper strata is made up of according to the raw material of weight portion following: COPP 85 parts, politef 13 parts, polyimides
0.7 part, tristerin 2 parts, nano aluminium oxide 0.4 part, fluorosilicone 0.3 part；Described middle level by following according to weight portion
Raw material composition: HOPP 94 parts, high density polyethylene (HDPE) 8 parts, ethoxylated amine 2 parts, sorbitol ester 0.8 part；Described
Lower floor is made up of according to the raw material of weight portion following: ternary polymerized polypropylene 91 parts, polyvinylidene fluoride 10 parts, butyl stearate
3 parts, precipitated silica 0.7 part；The thickness on described upper strata is 2.3 μm, and the thickness in middle level is 22 μm, and the thickness of lower floor is 3 μm.
The preparation method of the Biaxially oriented polypropylene heat-sealing film that coefficient of friction described in the present embodiment is low, step is as follows:
1) dispensing: weigh the raw material of the upper, middle and lower in proportion, and put into different batch cans, carry out batch mixing；
2) extrusion: middle level raw material flows into double screw extruder or single screw rod tandem extruder after batch mixing, upper layer material with
Lower layered material flows into respective subsidiary extruder after batch mixing, and three layered materials flow out after die head converges, extruder temperature: 268 DEG C；
3) slab: the resin that extruder die head flows out is cooled to sheet material, makes the degree of crystallinity of resin, crystal habit, crystal
Size reach perfect condition, to improve the physical property of thin film, slab machine chilling temperature: 24 DEG C；
4) longitudinal stretching: the sheet material come from slab machine is preheated, and under certain speed, sheet material is longitudinally drawn
Long, make polymer molecule carry out machine-direction oriented, preheating temperature is: 133 DEG C, draft temperature be: 138 DEG C, stretching ratio be:
490%；
5) cross directional stretch: the chain guide that the sheet material crossed by longitudinal stretching passes through to set is in the stretching having the bigger angle of flare
District carries out cross directional stretch, make equally polymer molecule at horizontal orientation, preheating temperature most preferably: 152 DEG C, draft temperature be: 157
DEG C, setting temperature be: 118 DEG C, stretching ratio be: 950%；
6) rolling: the horizontal thin film pulled out carries out rolling through winder after trimming again；
7) Ageing Treatment: the thin film after rolling is carried out Ageing Treatment, it is thus achieved that finished product.
Embodiment 5
The Biaxially oriented polypropylene heat-sealing film that a kind of coefficient of friction is low, the most successively by the upper, middle and lower group
Become；Described upper strata is made up of according to the raw material of weight portion following: COPP 86 parts, politef 15 parts, polyimides
1.0 parts, tristerin 3 parts, nano aluminium oxide 0.8 part, fluorosilicone 0.5 part；Described middle level by following according to weight portion
Raw material composition: HOPP 95 parts, high density polyethylene (HDPE) 9 parts, ethoxylated amine 2 parts, sorbitol ester 1.2 parts；Described
Lower floor is made up of according to the raw material of weight portion following: ternary polymerized polypropylene 93 parts, polyvinylidene fluoride 12 parts, butyl stearate
3 parts, precipitated silica 0.9 part；The thickness on described upper strata is 2.5 μm, and the thickness in middle level is 25 μm, and the thickness of lower floor is 3.2 μ
m。
The preparation method of the Biaxially oriented polypropylene heat-sealing film that coefficient of friction described in the present embodiment is low, step is as follows:
1) dispensing: weigh the raw material of the upper, middle and lower in proportion, and put into different batch cans, carry out batch mixing；
2) extrusion: middle level raw material flows into double screw extruder or single screw rod tandem extruder after batch mixing, upper layer material with
Lower layered material flows into respective subsidiary extruder after batch mixing, and three layered materials flow out after die head converges, extruder temperature: 270 DEG C；
3) slab: the resin that extruder die head flows out is cooled to sheet material, makes the degree of crystallinity of resin, crystal habit, crystal
Size reach perfect condition, to improve the physical property of thin film, slab machine chilling temperature: 25 DEG C；
4) longitudinal stretching: the sheet material come from slab machine is preheated, and under certain speed, sheet material is longitudinally drawn
Long, make polymer molecule carry out machine-direction oriented, preheating temperature is: 135 DEG C, draft temperature be: 140 DEG C, stretching ratio be:
500%；
5) cross directional stretch: the chain guide that the sheet material crossed by longitudinal stretching passes through to set is in the stretching having the bigger angle of flare
District carries out cross directional stretch, make equally polymer molecule at horizontal orientation, preheating temperature most preferably: 155 DEG C, draft temperature be: 160
DEG C, setting temperature be: 120 DEG C, stretching ratio be: 950%；
6) rolling: the horizontal thin film pulled out carries out rolling through winder after trimming again；
7) Ageing Treatment: the thin film after rolling is carried out Ageing Treatment, it is thus achieved that finished product.
Heat-sealing film prepared by embodiment 1-5 is carried out coefficient of friction detection, and its coefficient of friction is 0.09-0.11, it is possible to
Meet the demand of existing high-speed packaging machine.The present invention prepares the preparation side of the low Biaxially oriented polypropylene heat-sealing film of coefficient of friction
Method, its technique is simple, it is possible to large-scale industrial production.
Above the better embodiment of the present invention is explained in detail, but the present invention is not limited to above-mentioned embodiment party
Formula, in the ken that one skilled in the relevant art is possessed, it is also possible on the premise of without departing from present inventive concept
Various changes can be made.
Claims (5)
1. the Biaxially oriented polypropylene heat-sealing film that a coefficient of friction is low, it is characterised in that the most successively by upper strata, middle level
Form with lower floor；Described upper strata is made up of according to the raw material of weight portion following: COPP 83-86 part, politef 12-
15 parts, polyimides 0.6-1.0 part, tristerin 1-3 part, nano aluminium oxide 0.4-0.8 part, fluorosilicone 0.2-0.5
Part；Described middle level is made up of according to the raw material of weight portion following: HOPP 92-95 part, high density polyethylene (HDPE) 5-9 part, second
Epoxide amine 1-2 part, sorbitol ester 0.8-1.2 part；Described lower floor is made up of according to the raw material of weight portion following: ternary polymerization
Polypropylene 88-93 part, polyvinylidene fluoride 9-12 part, butyl stearate 1.5-3 part, precipitated silica 0.6-0.9 part.
The Biaxially oriented polypropylene heat-sealing film that coefficient of friction the most according to claim 1 is low, it is characterised in that described upper strata
It is made up of according to the raw material of weight portion following: COPP 84-85 part, politef 13-14 part, polyimides 0.7-
0.9 part, tristerin 1.3-2.8 part, nano aluminium oxide 0.5-0.7 part, fluorosilicone 0.3-0.4 part；Described middle level by
Form according to the raw material of weight portion below: HOPP 93-94 part, high density polyethylene (HDPE) 6-8 part, ethoxylated amine 1.3-
1.8 parts, sorbitol ester 0.9-1.1 part；Described lower floor is made up of according to the raw material of weight portion following: ternary polymerized polypropylene
89-92 part, polyvinylidene fluoride 10-11 part, butyl stearate 1.8-2.7 part, precipitated silica 0.7-0.8 part.
The Biaxially oriented polypropylene heat-sealing film that coefficient of friction the most according to claim 2 is low, it is characterised in that described upper strata
It is made up of according to the raw material of weight portion following: COPP 85 parts, politef 13 parts, polyimides 0.8 part, stearic acid
Glyceride 2.1 parts, nano aluminium oxide 0.6 part, fluorosilicone 0.3 part；Described middle level is made up of according to the raw material of weight portion following:
HOPP 93 parts, high density polyethylene (HDPE) 7 parts, ethoxylated amine 1.5 parts, sorbitol ester 1 part；Described lower floor is pressed by following
Raw material according to weight portion forms: ternary polymerized polypropylene 91 parts, polyvinylidene fluoride 10.6 parts, butyl stearate 2.3 parts, precipitation
Silicon dioxide 0.7 part.
The Biaxially oriented polypropylene heat-sealing film that coefficient of friction the most according to claim 3 is low, it is characterised in that described upper strata
Thickness be 1.8-2.5 μm, the thickness in middle level is 18-25 μm, and the thickness of lower floor is 2.0-3.2 μm.
5. a preparation method for the Biaxially oriented polypropylene heat-sealing film that coefficient of friction as described in claim 1-4 is arbitrary is low,
It is characterized in that, step is as follows:
1) dispensing: weigh the raw material of the upper, middle and lower in proportion, and put into different batch cans, carry out batch mixing；
2) extrusion: middle level raw material flows into double screw extruder or single screw rod tandem extruder, upper layer material and lower floor after batch mixing
Material flows into respective subsidiary extruder after batch mixing, and three layered materials flow out after die head converges, extruder temperature: 260-270 DEG C；
3) slab: by extruder die head flow out resin be cooled to sheet material, make the degree of crystallinity of resin, crystal habit, crystal big
Little reach perfect condition, to improve the physical property of thin film, slab machine chilling temperature: 20-25 DEG C；
4) longitudinal stretching: the sheet material come from slab machine is preheated, and under certain speed, sheet material is longitudinally elongated,
Make polymer molecule carry out machine-direction oriented, preheating temperature be: 128-135 DEG C, draft temperature be: 130-140 DEG C, stretching ratio
For: 450-500%；
5) cross directional stretch: the sheet material crossed by longitudinal stretching is entered at the drawing zone having the bigger angle of flare by the chain guide set
Row cross directional stretch, make equally polymer molecule at horizontal orientation, preheating temperature most preferably: 146-155 DEG C, draft temperature be:
150-160 DEG C, setting temperature be: 115-120 DEG C, stretching ratio be: 850-950%；
6) rolling: the horizontal thin film pulled out carries out rolling through winder after trimming again；
7) Ageing Treatment: the thin film after rolling is carried out Ageing Treatment, it is thus achieved that finished product.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111331984A (en) * | 2020-03-19 | 2020-06-26 | 昆山金盛达包装制品有限公司 | Aluminum-plastic composite film for packaging material |
| CN111806028A (en) * | 2020-07-22 | 2020-10-23 | 福建省炎英包装科技有限公司 | Ultra-low friction coefficient polypropylene aluminum-plated base material film and preparation method thereof |
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| WO1998037141A1 (en) * | 1997-02-25 | 1998-08-27 | Exxon Chemical Patents Inc. | Heat sealable films |
| CN103009748A (en) * | 2012-12-25 | 2013-04-03 | 海南赛诺实业有限公司 | Low-friction and biaxially oriented polypropylene heat-sealing membrane and manufacturing method thereof |
| CN103252959A (en) * | 2012-02-21 | 2013-08-21 | 中国石油化工股份有限公司 | Polypropylene film and preparation method thereof |
| CN105128472A (en) * | 2015-08-31 | 2015-12-09 | 山东泗水康得新复合材料有限公司 | Matte BOPP film and preparation method thereof |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998037141A1 (en) * | 1997-02-25 | 1998-08-27 | Exxon Chemical Patents Inc. | Heat sealable films |
| CN103252959A (en) * | 2012-02-21 | 2013-08-21 | 中国石油化工股份有限公司 | Polypropylene film and preparation method thereof |
| CN103009748A (en) * | 2012-12-25 | 2013-04-03 | 海南赛诺实业有限公司 | Low-friction and biaxially oriented polypropylene heat-sealing membrane and manufacturing method thereof |
| CN105128472A (en) * | 2015-08-31 | 2015-12-09 | 山东泗水康得新复合材料有限公司 | Matte BOPP film and preparation method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111331984A (en) * | 2020-03-19 | 2020-06-26 | 昆山金盛达包装制品有限公司 | Aluminum-plastic composite film for packaging material |
| CN111806028A (en) * | 2020-07-22 | 2020-10-23 | 福建省炎英包装科技有限公司 | Ultra-low friction coefficient polypropylene aluminum-plated base material film and preparation method thereof |
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