CN106945367A - A kind of cold stretching film and preparation method thereof - Google Patents
A kind of cold stretching film and preparation method thereof Download PDFInfo
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- CN106945367A CN106945367A CN201710196503.4A CN201710196503A CN106945367A CN 106945367 A CN106945367 A CN 106945367A CN 201710196503 A CN201710196503 A CN 201710196503A CN 106945367 A CN106945367 A CN 106945367A
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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
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
- B29C55/28—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of blown tubular films, e.g. by inflation
-
- 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
- B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
- B32B27/20—Layered products comprising a layer of synthetic resin characterised by the use of special additives using fillers, pigments, thixotroping agents
-
- 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
- B32B27/306—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising vinyl acetate or vinyl alcohol (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
- 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
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/54—Yield strength; Tensile strength
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
Abstract
The invention provides a kind of cold stretching film and preparation method thereof, the cold stretching film includes outer layer, middle level, internal layer, outer layer weight accounts for the 10~30% of film gross weight, middle layer weight accounts for the 40~50% of film gross weight, interior layer weight accounts for the 30~50% of film gross weight, outer layer preparing raw material includes MLLDPE 1018LA, MLLDPE 1018HA, PPA and HDPE F15, PPA and HDPE F15 are mutually cooperateed with improves the extrusion performance of cold stretching film jointly, prevent film coalescence；Middle level preparing raw material includes EVA0111 and VM6102, and the two synergy makes the elasticity of film, toughness enhancing, improves the tensile strength of film；Internal layer preparing raw material includes MLLDPE 1018HA, MLLDPE 1018LA and HDPE F15.The cold stretching film of the present invention, with good tensile strength, adhesion when using.
Description
Technical field
The invention belongs to thin film technique field, it is related to a kind of cold stretching film and preparation method thereof.
Background technology
PE stretched films (also known as winding film) have higher tensile strength, tearing toughness, and with good tack,
Therefore object can be made to wrap up in into an entirety, prevents from being scattered during transport and collapse.The film has the excellent transparency, and parcel object is attractive in appearance
It is generous, and object waterproof and dustproof, anti-tamper can be made, therefore it is widely used in cargo pallet packaging, such as electronics, building materials, chemical industry, gold
The bundle of the industries such as metal products, auto parts machinery, electric wire, commodity, food, papermaking wraps up in packaging.Most of PE add for blown film
Work film, the low close PE (LLDPE) of standard low density PE (LDPE) or linear all can use.HDPE film-grades are generally used for requiring superior
Draftability and fabulous barrier properties place.
CN103029397A discloses a kind of film and its production method, and the film includes outer layer, middle level, internal layer three
Point, each several part proportion of composing is (percentage by weight)：Outer layer 23%, middle level 52%, internal layer 25%, wherein outer layer is by LDPE
TN00, MDPE 1018HA, LLDPE 0209AA, LLDPE 120F are constituted, and middle level is by MDPE 2310, LLDPE 2230, LLDPE
0209AA, 075 masterbatch composition, internal layer is by LDPE TN00, MDPE 1018HA, MDPE 5400, MDPE 1018FA, LLDPE
0209AA, LLDPE 120F are constituted, by adjusting the raw material ratio of each layer, are prepared for that one kind is readily mass-produced, friction subsurface power is high, inner
The layer film that frictional force is small, intensity is high, but its tensile strength has much room for improvement, the easy adhesion when in use of the film after processing.
The content of the invention
In view of the shortcomings of the prior art, an object of the present invention is to provide a kind of cold stretching film, and it has good
Tensile strength, adhesion when using.
For up to this goal of the invention, the present invention uses following technical scheme：
A kind of cold stretching film, including outer layer, middle level, the part of internal layer three, the outer layer weight account for the 10~30% of film gross weight,
The middle layer weight accounts for the 40~50% of film gross weight, and the interior layer weight accounts for the 30~50% of film gross weight, it is preferable that institute of the present invention
Outer layer weight accounts for film gross weight 15% is stated, the middle layer weight accounts for the 50% of film gross weight, and the interior layer weight accounts for film gross weight
35%；Every layer of weight allotment makes film have good processing characteristics and mechanical performance；
Wherein, by weight percentage, the preparing raw material of the outer layer includes 20~40% MLLDPE 1018LA (cyclopentadienyls
Metal linear low density polyethylene (LDPE) 1018LA Exxon Mobils), 60~75% MLLDPE 1018HA (metallocene PEs
1018HA Exxon Mobils), (high density is gathered by 0.1~1% PPA (polyphthalamide) and 0.1~1% HDPE-F15
Ethene F15), the content sum of each component is 100% in above-mentioned raw materials, and such as MLLDPE 1018LA percentage by weight is
20%th, 22%, 25%, 26%, 29%, 30%, 31%, 34%, 35%, 36%, 38%, 40%, MLLDPE 1018HA weight
Measure percentage be 60%, 61%, 62%, 63%, 64%, 65%, 66%, 67%, 68%, 69%, 70%, 71%, 72%,
73%th, 74%, 75%, PPA percentage by weight be 0.1%, 0.2%, 0.3%, 0.4%, 0.5%, 0.6%, 0.7%,
0.8%th, 0.9%, 1%, HDPE-F15 percentage by weight be 0.1%, 0.2%, 0.3%, 0.4%, 0.5%, 0.6%,
0.7%th, 0.8%, 0.9%, 1%；Preferably, the preparing raw material of the outer layer includes 25~35% MLLDPE 1018LA, 65
Each component in~70% MLLDPE 1018HA, 0.2~0.8% PPA and 0.2~0.6% HDPE-F15, above-mentioned raw materials
Content sum be 100%；It is particularly preferred that the preparing raw material of the outer layer includes 30% MLLDPE 1018LA, 69%
MLLDPE 1018HA, 0.5% PPA and 0.5% HDPE-F15；Wherein, PPA is one to be based on fluoropolymer
Row polymer processing aidses product, it can be used to the processability for improving LDPE, LLDPE, MLLDPE, HDPE and other resins, no
PPA in a class processing aid of influence, the present invention can be produced on the physical and mechanical properties of matrix resin and is used as feature masterbatch
It is added to improvement MLLDPE extrudability in processing；HDPE-F15 makes after processing as feature masterbatch after addition
Film, which becomes, to be slided, and is difficult to be sticked together；PPA and HDPE-F15 as feature masterbatch, the two mutually cooperate with improve jointly it is cold drawn
The extrusion performance of film is stretched, the adhesion of film is prevented.If the proportioning of each preparing raw material is not in this range in outer layer, cold stretch can be influenceed
The processing characteristics of film.
By weight percentage, the preparing raw material in the middle level includes 70~80% (ethene-vinyl acetates of EVA 0111
Copolymer 0111) and 20~30% VM 6102 (elastomers of Exxon Mobil VM 6102), such as EVA 0111 weight hundred
Divide than the weight percent for 70%, 71%, 72%, 73%, 74%, 75%, 76%, 77%, 78%, 79%, 80%, VM6102
Than for 20%, 21%, 22%, 23%, 24%, 25%, 26%, 27%, 28%, 29%, 30%；Preferably, the middle level
Preparing raw material includes 72~76% EVA 0111 and 22~26% VM 6102；Particularly preferably, the preparation in the middle level is former
Material includes 75% EVA 0111 and 25% VM 6102.EVA 0111 is in terms of elasticity, flexible, glossiness and gas permeability
Superiority clearly, VM 6102 addition can be effectively improved the toughness of film, and EVA 0111 and VM 6102 acts synergistically
Make elasticity, the toughness enhancing of film, improve the tensile strength of film.If the proportioning of each preparing raw material is not in this range in middle level,
The tensile strength of cold stretching film can be influenceed.
By weight percentage, the preparing raw material of the internal layer includes 50~70% MLLDPE 1018HA, 35~40%
MLLDPE 1018LA and 0.1~1% HDPE-F15, the content sum of each component is 100% in above-mentioned raw materials, for example
MLLDPE 1018HA percentage by weight be 50%, 52%, 54%, 55%, 58%, 60%, 61%, 63%, 65%, 68%,
70%, MLLDPE 1018LA percentage by weight be 35%, 36%, 37%, 38%, 39%, 40%, HDPE-F15 weight
Percentage is 0.1%, 0.2%, 0.3%, 0.4%, 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, 1%；Preferably, it is described
The preparing raw material of internal layer includes 60~65% MLLDPE 1018HA, 36~38% MLLDPE 1018LA and 0.3~0.6%
HDPE-F15, the content sum of each component is 100% in above-mentioned raw materials；Particularly preferably, the preparing raw material bag of the internal layer
Include 60.8% MLLDPE 1018HA, 38.7% MLLDPE 1018LA and 0.5% HDPE-F15.If respectively being prepared in internal layer
Not in this range, the resist blocking and that effect of film is not good for the proportioning of raw material.
The second object of the present invention is to provide a kind of preparation method of cold stretching film as described above, and technique is simple, institute
Preparation method is stated to comprise the following steps：
1) batch mixing, prepares the outer layer raw mixture of cold stretching film after the preparing raw material of the outer layer of formula ratio is mixed, will
The middle level raw mixture of cold stretching film is prepared after the preparing raw material mixing in the middle level of formula ratio, by the preparation of the internal layer of formula ratio
The internal layer raw mixture of cold stretching film is prepared after raw material mixing；
2) dispensing, by step 1) prepare the outer layer raw mixture of cold stretching film, middle level raw mixture, internal layer raw material
Mixture carries out dispensing by proportioning；
3) blown film, by step 2) membrane material coextrusion blow shaping after dispensing.
The coextrusion blow process is, by outer layer raw mixture, middle level raw mixture, internal layer raw mixture by matching somebody with somebody
Than add three-layer co-extruded inflation film machine it is outer, in, in internal layer hopper, heat and gradually heat up, outer layer, middle level, internal layer it is crowded
Go out temperature control at 170~185 DEG C, cold stretching film is made in extruded blow molding.
Compared with prior art, beneficial effects of the present invention are：The cold stretching film of the present invention is from three layers of different material
And by adjusting every layer of ratio, make obtained film that there is good tensile strength, and adhesion when using；Outside cold stretching film
Layer choosing is raw material with MLLDPE 1018LA, MLLDPE 1018HA, PPA and HDPE-F15, by adjusting raw material proportioning, PPA with
HDPE-F15 synergies make film easily be extruded when processing, and the film processed occurs without the phenomenon of adhesion；In cold stretching film
Layer choosing is raw material with EVA 0111 and VM 6102, and by adjusting raw material proportioning, EVA 0111 and VM 6102 synergies make film
Elasticity, toughness enhancing, improve the tensile strength of film, tensile strength reaches more than 58MPa, and elongation at break is more than 668%；
Internal layer is raw material from MLLDPE 1018HA, MLLDPE 1018LA and HDPE-F15, and the film processed occurs without showing for adhesion
As.
Embodiment
Technical scheme is further illustrated below by embodiment.
Unless specific instructions, various raw materials of the invention are commercially available buys, or is prepared according to the conventional method of this area
Obtain.
Embodiment 1
The cold stretching film of the present embodiment, including outer layer, middle level, the part of internal layer three, outer layer weight account for the 30% of film gross weight, in
Layer weight accounts for the 40% of film gross weight, and interior layer weight accounts for the 30% of film gross weight, wherein, by weight percentage, the preparation of outer layer is former
Expect to be made up of 34% MLLDPE 1018LA, 65% MLLDPE 1018HA, 0.5% PPA and 0.5% HDPE-F15；
The preparing raw material in middle level is made up of 70% EVA 0111 and 30% VM 6102；
The preparing raw material of internal layer by 60% MLLDPE 1018HA, 39% MLLDPE 1018LA and 1% HDPE-
F15 is constituted.
The preparation method of the cold stretching film of the present embodiment is as follows：
1) batch mixing, prepares the outer layer raw mixture of cold stretching film after the preparing raw material of the outer layer of formula ratio is mixed, will
The middle level raw mixture of cold stretching film is prepared after the preparing raw material mixing in the middle level of formula ratio, by the preparation of the internal layer of formula ratio
The internal layer raw mixture of cold stretching film is prepared after raw material mixing；
2) dispensing, by step 1) prepare the outer layer raw mixture of cold stretching film, middle level raw mixture, internal layer raw material
Mixture carries out dispensing by proportioning；
3) blown film, by step 2) membrane material coextrusion blow shaping after dispensing, wherein, coextrusion blow process is, by outer layer
Raw mixture, middle level raw mixture, internal layer raw mixture by proportioning add three-layer co-extruded inflation film machine it is outer, in,
In internal layer hopper, heat and gradually heat up, outer layer, middle level, the extrusion temperature of internal layer are controlled at 170~185 DEG C, extruded blowing
Cold stretching film is made in shaping.
Embodiment 2
The cold stretching film of the present embodiment, including outer layer, middle level, the part of internal layer three, outer layer weight account for the 15% of film gross weight, in
Layer weight accounts for the 45% of film gross weight, and interior layer weight accounts for the 40% of film gross weight, wherein, by weight percentage, the preparation of outer layer is former
Expect to be made up of 30% MLLDPE 1018LA, 69% MLLDPE 1018HA, 0.1% PPA and 0.9% HDPE-F15；
The preparing raw material in middle level is made up of 75% EVA 0111 and 25% VM 6102；
The preparing raw material of internal layer by 62% MLLDPE 1018HA, 37.2% MLLDPE 1018LA's and 0.8%
HDPE-F15 is constituted.
The preparation method of the cold stretching film of the present embodiment is same as Example 1, will not be repeated here.
Embodiment 3
The cold stretching film of the present embodiment, including outer layer, middle level, the part of internal layer three, outer layer weight account for the 20% of film gross weight, in
Layer weight accounts for the 50% of film gross weight, and interior layer weight accounts for the 30% of film gross weight, wherein, by weight percentage, the preparation of outer layer is former
Expect to be made up of 28% MLLDPE 1018LA, 71% MLLDPE 1018HA, 0.3% PPA and 0.7% HDPE-F15；
The preparing raw material in middle level is made up of 74% EVA 0111 and 26% VM 6102；
The preparing raw material of internal layer by 64% MLLDPE 1018HA, 35% MLLDPE 1018LA and 1% HDPE-
F15 is constituted.
The preparation method of the cold stretching film of the present embodiment is same as Example 1, will not be repeated here.
Embodiment 4
The cold stretching film of the present embodiment, including outer layer, middle level, the part of internal layer three, outer layer weight account for the 22% of film gross weight, in
Layer weight accounts for the 46% of film gross weight, and interior layer weight accounts for the 32% of film gross weight, wherein, by weight percentage, the preparation of outer layer is former
Expect to be made up of 33% MLLDPE 1018LA, 66% MLLDPE 1018HA, 0.8% PPA and 0.2% HDPE-F15；
The preparing raw material in middle level is made up of 73% EVA 0111 and 27% VM 6102；
The preparing raw material of internal layer by 60% MLLDPE 1018HA, 39.3% MLLDPE 1018LA's and 0.7%
HDPE-F15 is constituted.
The preparation method of the cold stretching film of the present embodiment is same as Example 1, will not be repeated here.
Embodiment 5
The cold stretching film of the present embodiment, including outer layer, middle level, the part of internal layer three, outer layer weight account for the 27% of film gross weight, in
Layer weight accounts for the 45% of film gross weight, and interior layer weight accounts for the 28% of film gross weight, wherein, by weight percentage, the preparation of outer layer is former
Expect to be made up of 38% MLLDPE 1018LA, 61% MLLDPE 1018HA, 0.1% PPA and 0.9% HDPE-F15；
The preparing raw material in middle level is made up of 80% EVA 0111 and 20% VM 6102；
The preparing raw material of internal layer by 66% MLLDPE 1018HA, 33.6% MLLDPE 1018LA's and 0.4%
HDPE-F15 is constituted.
The preparation method of the cold stretching film of the present embodiment is same as Example 1, will not be repeated here.
Embodiment 6
The cold stretching film of the present embodiment, including outer layer, middle level, the part of internal layer three, outer layer weight account for the 19% of film gross weight, in
Layer weight accounts for the 50% of film gross weight, and interior layer weight accounts for the 31% of film gross weight, wherein, by weight percentage, the preparation of outer layer is former
Expect to be made up of 33% MLLDPE 1018LA, 66% MLLDPE 1018HA, 0.7% PPA and 0.3% HDPE-F15；
The preparing raw material in middle level is made up of 71% EVA 0111 and 29% VM 6102；
The preparing raw material of internal layer by 60% MLLDPE 1018HA, 39.2% MLLDPE 1018LA's and 0.8%
HDPE-F15 is constituted.
The preparation method of the cold stretching film of the present embodiment is same as Example 1, will not be repeated here.
Embodiment 7
The cold stretching film of the present embodiment, including outer layer, middle level, the part of internal layer three, outer layer weight account for the 13% of film gross weight, in
Layer weight accounts for the 41% of film gross weight, and interior layer weight accounts for the 46% of film gross weight, wherein, by weight percentage, the preparation of outer layer is former
Expect to be made up of 22% MLLDPE 1018LA, 77% MLLDPE 1018HA, 0.5% PPA and 0.5% HDPE-F15；
The preparing raw material in middle level is made up of 78% EVA 0111 and 22% VM 6102；
The preparing raw material of internal layer by 63% MLLDPE 1018HA, 36% MLLDPE 1018LA and 1% HDPE-
F15 is constituted.
The preparation method of the cold stretching film of the present embodiment is same as Example 1, will not be repeated here.
Embodiment 8
The cold stretching film of the present embodiment, including outer layer, middle level, the part of internal layer three, outer layer weight account for the 15% of film gross weight, in
Layer weight accounts for the 50% of film gross weight, and interior layer weight accounts for the 35% of film gross weight, wherein, by weight percentage, the preparation of outer layer is former
Expect to be made up of 34% MLLDPE 1018LA, 65% MLLDPE 1018HA, 0.5% PPA and 0.5% HDPE-F15；
The preparing raw material in middle level is made up of 70% EVA 0111 and 30% VM 6102；
The preparing raw material of internal layer by 60% MLLDPE 1018HA, 39% MLLDPE 1018LA and 1% HDPE-
F15 is constituted.
The preparation method of the cold stretching film of the present embodiment is same as Example 1, will not be repeated here.
Comparative example 1
The cold stretching film of this comparative example, including outer layer, middle level, the part of internal layer three, outer layer weight account for the 30% of film gross weight, in
Layer weight accounts for the 40% of film gross weight, and interior layer weight accounts for the 30% of film gross weight, wherein, by weight percentage, the preparation of outer layer is former
Expect by 34% MLLDPE 1018LA, 65% MLLDPE 1018HA, 1% HDPE-F15 compositions；
The preparing raw material in middle level is made up of 70% EVA 0111 and 30% VM 6102；
The preparing raw material of internal layer by 60% MLLDPE 1018HA, 39% MLLDPE 1018LA and 1% HDPE-
F15 is constituted.
The preparation method of the cold stretching film of this comparative example is same as Example 1, will not be repeated here.This comparative example is with implementing
It is the raw material and proportioning difference of outer layer in place of the difference of example 1.
Comparative example 2
The cold stretching film of this comparative example, including outer layer, middle level, the part of internal layer three, outer layer weight account for the 30% of film gross weight, in
Layer weight accounts for the 40% of film gross weight, and interior layer weight accounts for the 30% of film gross weight, wherein, by weight percentage, the preparation of outer layer is former
Expect by 34% MLLDPE 1018LA, 65% MLLDPE 1018HA, 1% PPA compositions；
The preparing raw material in middle level is made up of 70% EVA 0111 and 30% VM 6102；
The preparing raw material of internal layer by 60% MLLDPE 1018HA, 39% MLLDPE 1018LA and 1% HDPE-
F15 is constituted.
The preparation method of the cold stretching film of this comparative example is same as Example 1, will not be repeated here.This comparative example is with implementing
It is the raw material and proportioning difference of outer layer in place of the difference of example 1.
Comparative example 3
The cold stretching film of this comparative example, including outer layer, middle level, the part of internal layer three, outer layer weight account for the 30% of film gross weight, in
Layer weight accounts for the 40% of film gross weight, and interior layer weight accounts for the 30% of film gross weight, wherein, by weight percentage, the preparation of outer layer is former
Expect to be made up of 34% MLLDPE 1018LA, 65% MLLDPE 1018HA, 0.5% PPA and 0.5% HDPE-F15；
The preparing raw material in middle level is EVA 0111；
The preparing raw material of internal layer by 60% MLLDPE 1018HA, 39% MLLDPE 1018LA and 1% HDPE-
F15 is constituted.
The preparation method of the cold stretching film of this comparative example is same as Example 1, will not be repeated here.This comparative example is with implementing
It is the raw material difference in middle level in place of the difference of example 1.
Comparative example 4
The cold stretching film of this comparative example, including outer layer, middle level, the part of internal layer three, outer layer weight account for the 30% of film gross weight, in
Layer weight accounts for the 40% of film gross weight, and interior layer weight accounts for the 30% of film gross weight, wherein, by weight percentage, the preparation of outer layer is former
Expect to be made up of 34% MLLDPE 1018LA, 65% MLLDPE 1018HA, 0.5% PPA and 0.5% HDPE-F15；
The preparing raw material in middle level is VM 6102；
The preparing raw material of internal layer by 60% MLLDPE 1018HA, 39% MLLDPE 1018LA and 1% HDPE-
F15 is constituted.
The preparation method of the cold stretching film of this comparative example is same as Example 1, will not be repeated here.This comparative example is with implementing
It is the raw material difference in middle level in place of the difference of example 1.
Comparative example 5
The cold stretching film of this comparative example, including outer layer, middle level, the part of internal layer three, outer layer weight account for the 30% of film gross weight, in
Layer weight accounts for the 40% of film gross weight, and interior layer weight accounts for the 30% of film gross weight, wherein, by weight percentage, the preparation of outer layer is former
Expect to be made up of 34% MLLDPE 1018LA, 65% MLLDPE 1018HA, 0.5% PPA and 0.5% HDPE-F15；
The preparing raw material in middle level is made up of 70% EVA 0111 and 30% polyolefin elastomer (POE)；
The preparing raw material of internal layer by 60% MLLDPE 1018HA, 39% MLLDPE 1018LA and 1% HDPE-
F15 is constituted.
The preparation method of the cold stretching film of this comparative example is same as Example 1, will not be repeated here.This comparative example is with implementing
It is the raw material difference in middle level in place of the difference of example 1.
Comparative example 6
The cold stretching film of this comparative example, including outer layer, middle level, the part of internal layer three, outer layer weight account for the 60% of film gross weight, in
Layer weight accounts for the 30% of film gross weight, and interior layer weight accounts for the 10% of film gross weight, wherein, by weight percentage, the preparation of outer layer is former
Expect to be made up of 34% MLLDPE 1018LA, 65% MLLDPE 1018HA, 0.5% PPA and 0.5% HDPE-F15；
The preparing raw material in middle level is made up of 70% EVA 0111 and 30% VM 6102；
The preparing raw material of internal layer by 60% MLLDPE 1018HA, 39% MLLDPE 1018LA and 1% HDPE-
F15 is constituted.
The preparation method of the cold stretching film of this comparative example is same as Example 1, will not be repeated here.This comparative example is with implementing
It is the ratio difference of film gross weight shared by the weight of outer layer, middle level, internal layer in place of the difference of example 1.
Performance to the embodiment 1-8 and comparative example 1-6 films prepared is tested, and test result is as shown in table 1.
Table 1
As it can be seen from table 1 the present invention is by adjusting outer layer, middle level, the weight of internal layer and every layer of raw material and proportioning,
Obtained cold stretching film has a good tensile property, and tensile strength is more than 58MPa, elongation at break more than 668%, plus
Film after work does not produce adhesion phenomenon.PPA and HDPE-F15 is as feature masterbatch in cladding material, and the two is mutually cooperateed with jointly
The extrusion performance of cold stretching film is improved, the adhesion of film is prevented；EVA 0111 and VM 6102 synergies make film in middle layer material
Elasticity, toughness enhancing, improve the tensile strength of film.
Applicant states that the present invention illustrates detailed process equipment and the technological process of the present invention by above-described embodiment,
But the invention is not limited in above-mentioned detailed process equipment and technological process, that is, do not mean that the present invention has to rely on above-mentioned detailed
Process equipment and technological process could be implemented.Person of ordinary skill in the field it will be clearly understood that any improvement in the present invention,
Addition, selection of concrete mode of equivalence replacement and auxiliary element to each raw material of product of the present invention etc., all fall within the present invention's
Within the scope of protection domain and disclosure.
Claims (10)
1. a kind of cold stretching film, including outer layer, middle level, the part of internal layer three, it is characterised in that the outer layer weight accounts for film gross weight
10~30%, the middle layer weight accounts for the 40~50% of film gross weight, and the interior layer weight accounts for the 30~50% of film gross weight, wherein,
By weight percentage,
The preparing raw material of the outer layer includes 20~40% MLLDPE 1018LA, 60~75% MLLDPE1018HA, 0.1
The content sum of each component is 100% in~1% PPA and 0.1~1% HDPE-F15, above-mentioned raw materials；
The preparing raw material in the middle level includes 70~80% EVA 0111 and 20~30% VM 6102；
The preparing raw material of the internal layer include 50~70% MLLDPE 1018HA, 35~40% MLLDPE 1018LA and
The content sum of each component is 100% in 0.1~1% HDPE-F15, above-mentioned raw materials.
2. cold stretching film according to claim 1, it is characterised in that the outer layer weight accounts for the 15% of film gross weight, described
Middle layer weight accounts for the 50% of film gross weight, and the interior layer weight accounts for the 35% of film gross weight.
3. cold stretching film according to claim 1 or 2, it is characterised in that by weight percentage, the preparation of the outer layer
Raw material include 25~35% MLLDPE 1018LA, 65~70% MLLDPE1018HA, 0.2~0.8% PPA and 0.2~
The content sum of each component is 100% in 0.6% HDPE-F15, above-mentioned raw materials.
4. the cold stretching film according to one of claim 1-3, it is characterised in that by weight percentage, the outer layer
Preparing raw material includes 30% MLLDPE 1018LA, 69% MLLDPE 1018HA, 0.5% PPA and 0.5% HDPE-
F15。
5. the cold stretching film according to one of claim 1-4, it is characterised in that by weight percentage, the middle level
Preparing raw material includes 72~76% EVA 0111 and 22~26% VM 6102.
6. the cold stretching film according to one of claim 1-5, it is characterised in that by weight percentage, the middle level
Preparing raw material includes 75% EVA 0111 and 25% VM 6102.
7. the cold stretching film according to one of claim 1-6, it is characterised in that by weight percentage, the internal layer
Preparing raw material includes 60~65% MLLDPE 1018HA, 36~38% MLLDPE1018LA and 0.3~0.6% HDPE-
The content sum of each component is 100% in F15, above-mentioned raw materials.
8. the cold stretching film according to one of claim 1-7, it is characterised in that by weight percentage, the internal layer
Preparing raw material includes 60.8% MLLDPE 1018HA, 38.7% MLLDPE1018LA and 0.5% HDPE-F15.
9. the preparation method of the cold stretching film according to one of claim 1-8, it is characterised in that the preparation method includes
Following steps：
1) batch mixing, prepares the outer layer raw mixture of cold stretching film, will be formulated after the preparing raw material of the outer layer of formula ratio is mixed
The middle level raw mixture of cold stretching film is prepared after the preparing raw material mixing in the middle level of amount, by the preparing raw material of the internal layer of formula ratio
The internal layer raw mixture of cold stretching film is prepared after mixing；
2) dispensing, by step 1) prepare the outer layer raw mixture of cold stretching film, middle level raw mixture, the mixing of internal layer raw material
Thing carries out dispensing by proportioning；
3) blown film, by step 2) membrane material coextrusion blow shaping after dispensing.
10. the preparation method of cold stretching film as claimed in claim 9, it is characterised in that step 3) in, the coextrusion blow mistake
Cheng Wei, three-layer co-extruded inflation film is added by outer layer raw mixture, middle level raw mixture, internal layer raw mixture by proportioning
Machine it is outer, in, in internal layer hopper, heat and gradually heat up, outer layer, middle level, the extrusion temperature control of internal layer at 170~185 DEG C,
Cold stretching film is made in extruded blow molding.
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| CN107867034A (en) * | 2017-12-18 | 2018-04-03 | 昆山金盟塑料薄膜有限公司 | A kind of cold stretching film |
| CN108081582A (en) * | 2017-12-18 | 2018-05-29 | 昆山金盟塑料薄膜有限公司 | A kind of preparation method of cold stretching film |
| CN109094163A (en) * | 2018-10-29 | 2018-12-28 | 昆山金盟塑料薄膜有限公司 | A kind of high intensity cold stretched film and preparation method thereof |
| CN109094162A (en) * | 2018-10-29 | 2018-12-28 | 昆山金盟塑料薄膜有限公司 | A kind of high intensity cold stretched film and preparation method thereof |
| CN110204824A (en) * | 2019-06-15 | 2019-09-06 | 中轻联（大连）包装研究院有限公司 | Polyolefin cold-stretched sleeve film and preparation method thereof |
| CN113682015A (en) * | 2021-07-28 | 2021-11-23 | 金旸（厦门）新材料科技有限公司 | Composite waterproof coiled material and preparation method thereof |
| CN118876546A (en) * | 2024-06-19 | 2024-11-01 | 江阴市格瑞包装材料有限公司 | Food packaging film, packaging bag and preparation method for high-temperature cooking |
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| CN109094162A (en) * | 2018-10-29 | 2018-12-28 | 昆山金盟塑料薄膜有限公司 | A kind of high intensity cold stretched film and preparation method thereof |
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| CN110204824A (en) * | 2019-06-15 | 2019-09-06 | 中轻联（大连）包装研究院有限公司 | Polyolefin cold-stretched sleeve film and preparation method thereof |
| CN113682015A (en) * | 2021-07-28 | 2021-11-23 | 金旸（厦门）新材料科技有限公司 | Composite waterproof coiled material and preparation method thereof |
| CN118876546A (en) * | 2024-06-19 | 2024-11-01 | 江阴市格瑞包装材料有限公司 | Food packaging film, packaging bag and preparation method for high-temperature cooking |
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