CN106945367B - 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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- CN106945367B CN106945367B CN201710196503.4A CN201710196503A CN106945367B CN 106945367 B CN106945367 B CN 106945367B CN 201710196503 A CN201710196503 A CN 201710196503A CN 106945367 B CN106945367 B CN 106945367B
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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
Abstract
The present invention provides a kind of cold stretching films and preparation method thereof, the cold stretching film includes outer layer, middle layer, 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, it includes MLLDPE 1018LA, MLLDPE 1018HA, PPA and HDPE-F15 that outer layer, which prepares raw material, and PPA mutually cooperates with jointly the extrusion performance for improving cold stretching film with HDPE-F15, prevents film coalescence；It includes EVA 00111 and VM6102 that middle layer, which prepares raw material, and the two synergistic effect makes the elasticity of film, toughness enhancing, improves the tensile strength of film；It includes MLLDPE 1018HA, MLLDPE 1018LA and HDPE-F15 that internal layer, which prepares raw material,.Cold stretching film of the invention has good tensile strength, adhesion when use.
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 technique
PE stretched film (also known as winding film) tensile strength with higher, tearing toughness, and there is good tack,
Therefore object can be made to wrap up in into an entirety, prevents from being scattered when transport and collapses.The film has the excellent transparency, and package object is beautiful
It is generous, and object waterproof and dustproof, anti-tamper can be made, therefore be widely used in cargo pallet packaging, such as electronics, building materials, chemical industry, gold
The bundle of the industries such as metal products, automobile parts, wire and cable, daily necessities, food, papermaking wraps up in packaging.Most of PE add for blown film
Work film, standard low density PE (LDPE) or linear low close PE (LLDPE) are all available.HDPE film-grade is generally used for requiring superior
Draftability and fabulous barrier properties place.
It includes outer layer, middle layer, internal layer three that CN103029397A, which discloses a kind of film and its production method, the film,
Point, each section composition ratio is (weight percent)：Outer layer 23%, middle layer 52%, internal layer 25%, wherein outer layer is by LDPE
TN00, MDPE 1018HA, LLDPE 0209AA, LLDPE 120F composition, middle layer 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 composition are prepared for that one kind is readily mass-produced, friction subsurface power is high, inner by adjusting the raw material ratio of each layer
The layer film that frictional force is small, intensity is high, but its tensile strength is to be improved, the easy adhesion when in use of the film after processing.
Summary of the invention
In view of the deficiencies of the prior art, one of the objects of the present invention is to provide a kind of cold stretching films, with good
Tensile strength, adhesion when use.
For up to the invention purpose, the present invention uses following technical scheme：
A kind of cold stretching film, including outer layer, middle layer, internal layer three parts, 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 performance and mechanical performance；
Wherein, by weight percentage, MLLDPE1018LA (the cyclopentadienyl gold for preparing raw material and including 20~40% of the outer layer
Belong to linear low density polyethylene 1018LA Exxon Mobil), 60~75% MLLDPE1018HA (metallocene PE 1018HA
Exxon Mobil), the HDPE-F15 (high density polyethylene (HDPE) of 0.1~1% PPA (polyphthalamide) and 0.1~1%
F15), in above-mentioned raw materials the sum of content of each component be 100%, such as MLLDPE 1018LA weight percent be 20%,
22%, the weight hundred of 25%, 26%, 29%, 30%, 31%, 34%, 35%, 36%, 38%, 40%, MLLDPE 1018HA
Point than for 60%, 61%, 62%, 63%, 64%, 65%, 66%, 67%, 68%, 69%, 70%, 71%, 72%, 73%,
74%, the weight percent of 75%, PPA be 0.1%, 0.2%, 0.3%, 0.4%, 0.5%, 0.6%, 0.7%, 0.8%,
0.9%, the weight percent of 1%, HDPE-F15 be 0.1%, 0.2%, 0.3%, 0.4%, 0.5%, 0.6%, 0.7%,
0.8%, 0.9%, 1%；Preferably, the MLLDPE 1018LA for preparing raw material and including 25~35% of the outer layer, 65~70%
MLLDPE 1018HA, the HDPE-F15 of 0.2~0.8% PPA and 0.2~0.6%, the content of each component in above-mentioned raw materials
The sum of be 100%；It is particularly preferred that the MLLDPE 1018LA, 69% MLLDPE that prepare raw material and include 30% of the outer layer
1018HA, the HDPE-F15 of 0.5% PPA and 0.5%；Wherein, PPA can be used to improve LDPE, LLDPE, MLLDPE, HDPE and
The processability of other resins, will not be to a kind of processing aid that the physical mechanical property of matrix resin has an impact, in the present invention
PPA as functional masterbatch to be added to improve MLLDPE extrudability in processing；HDPE-F15 is as function sexupara
Material, the film after processing is made after addition, which becomes, to be slided, and is not easy to be sticked together；For PPA and HDPE-F15 as functional masterbatch, the two is mutual
Collaboration improves the extrusion performance of cold stretching film jointly, prevents the adhesion of film.If respectively preparing the proportion of raw material in outer layer not herein
In range, the processing performance of cold stretching film will affect.
By weight percentage, (the ethyl vinyl acetate second of EVA 00111 for preparing raw material and including 70~80% in the middle layer
Alkene copolymer EVA 00111) and 20~30% VM 6102 (6102 elastomer of Exxon Mobil VM), such as EVA 00111
Weight percent be 70%, 71%, 72%, 73%, 74%, 75%, 76%, 77%, 78%, 79%, 80%, VM6102
Weight percent is 20%, 21%, 22%, 23%, 24%, 25%, 26%, 27%, 28%, 29%, 30%；Preferably, institute
That states middle layer prepares the VM 6102 that raw material includes 72~76% EVA 00111 and 22~26%；Particularly preferably, in described
Layer prepares the VM 6102 that raw material includes 75% EVA 00111 and 25%.EVA 00111 elasticity, flexible, glossiness and
Clearly, the addition of VM 6102 can be effectively improved the toughness of film, EVA 00111 and VM to the superiority of gas permeability etc.
6102 synergistic effects make the elasticity of film, toughness enhancing, improve the tensile strength of film.If respectively preparing the proportion of raw material not in middle layer
Within this range, it will affect the tensile strength of cold stretching film.
By weight percentage, the MLLDPE 1018HA for preparing raw material and including 50~70% of the internal layer, 35~40%
MLLDPE 1018LA and 0.1~1% HDPE-F15, the sum of content of each component is 100% in above-mentioned raw materials, such as
The weight percent of MLLDPE 1018HA be 50%, 52%, 54%, 55%, 58%, 60%, 61%, 63%, 65%, 68%,
The weight percent of 70%, MLLDPE 1018LA are the weight of 35%, 36%, 37%, 38%, 39%, 40%, HDPE-F15
Percentage is 0.1%, 0.2%, 0.3%, 0.4%, 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, 1%；Preferably, described
The MLLDPE 1018HA, 36~38% MLLDPE 1018LA and 0.3~0.6% that prepare raw material and include 60~65% of internal layer
HDPE-F15, the sum of content of each component is 100% in above-mentioned raw materials；Particularly preferably, the internal layer prepares raw material packet
Include 60.8% MLLDPE 1018HA, the HDPE-F15 of 38.7% MLLDPE 1018LA and 0.5%.If respectively being prepared in internal layer
Not in this range, the resist blocking and that of film is ineffective for the proportion 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, simple process, institute
Preparation method is stated to include the following steps：
1) preparing after raw material mixes for the outer layer of formula ratio is prepared the outer layer raw mixture of cold stretching film by mixing, will
The middle layer of formula ratio prepares the middle layer raw mixture that cold stretching film is prepared after raw material mixes, 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) ingredient, by outer layer raw mixture, middle layer raw mixture, the internal layer raw material of the cold stretching film of step 1) preparation
Mixture carries out ingredient according to the ratio；
3) blown film forms the membrane material coextrusion blow after step 2) ingredient.
The coextrusion blow process is, by outer layer raw mixture, middle layer raw mixture, internal layer raw mixture by matching
Than be added three-layer co-extruded inflation film machine it is outer, in, in internal layer hopper, heat and be gradually warmed up, outer layer, middle layer, internal layer squeeze
Cold stretching film is made through extrusion and blow molding at 170~185 DEG C in temperature control out.
Compared with prior art, beneficial effects of the present invention are：Cold stretching film of the invention selects three layers of different material
And by adjusting every layer of ratio, adhesion when making film obtained that there is good tensile strength, and using；Outside cold stretching film
Layer choosing is raw material with MLLDPE 1018LA, MLLDPE 1018HA, PPA and HDPE-F15, by adjust raw material proportioning, PPA with
HDPE-F15 synergistic effect squeezes out film easily when processing, and the phenomenon that adhesion does not occur in the film processed；In cold stretching film
Layer choosing EVA 00111 and VM 6102 is raw material, and by adjusting raw material proportioning, the synergistic effect of EVA 00111 and VM 6102 makes
The elasticity of film, toughness enhancing, improve the tensile strength of film, and tensile strength reaches 58MPa or more, elongation at break 668% with
On；It is raw material that internal layer, which selects MLLDPE 1018HA, MLLDPE 1018LA and HDPE-F15, and adhesion does not occur in the film processed
Phenomenon.
Specific embodiment
The technical scheme of the invention is further explained by means of specific implementation.
Unless specific instructions, various raw materials of the invention are commercially available buys, or is prepared according to the conventional method of this field
It obtains.
Embodiment 1
The cold stretching film of the present embodiment, including outer layer, middle layer, internal layer three parts, 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
Material is made of the HDPE-F15 of 34% MLLDPE 1018LA, 65% MLLDPE1018HA, 0.5% PPA and 0.5%；
The raw material for preparing in middle layer is made of the VM 6102 of 70% EVA 00111 and 30%；
Internal layer prepares raw material by 60% MLLDPE 1018HA, the HDPE- of 39% MLLDPE 1018LA and 1%
F15 composition.
The preparation method of the cold stretching film of the present embodiment is as follows：
1) preparing after raw material mixes for the outer layer of formula ratio is prepared the outer layer raw mixture of cold stretching film by mixing, will
The middle layer of formula ratio prepares the middle layer raw mixture that cold stretching film is prepared after raw material mixes, 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) ingredient, by outer layer raw mixture, middle layer raw mixture, the internal layer raw material of the cold stretching film of step 1) preparation
Mixture carries out ingredient according to the ratio；
3) blown film forms the membrane material coextrusion blow after step 2) ingredient, wherein coextrusion blow process is, by outer layer
Raw mixture, middle layer raw mixture, internal layer raw mixture be added according to the ratio three-layer co-extruded inflation film machine it is outer, in,
It in internal layer hopper, heats and is gradually warmed up, the extrusion temperature control of outer layer, middle layer, internal layer is at 170~185 DEG C, through extrusion-blown modling
It forms and cold stretching film is made.
Embodiment 2
The cold stretching film of the present embodiment, including outer layer, middle layer, internal layer three parts, 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
Material is made of the HDPE-F15 of 30% MLLDPE 1018LA, 69% MLLDPE1018HA, 0.1% PPA and 0.9%；
The raw material for preparing in middle layer is made of the VM 6102 of 75% EVA 00111 and 25%；
Internal layer prepares raw material by 62% MLLDPE 1018HA, 37.2% MLLDPE 1018LA's and 0.8%
HDPE-F15 composition.
The preparation method of the cold stretching film of the present embodiment is same as Example 1, and details are not described herein.
Embodiment 3
The cold stretching film of the present embodiment, including outer layer, middle layer, internal layer three parts, 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
Material is made of the HDPE-F15 of 28% MLLDPE 1018LA, 71% MLLDPE1018HA, 0.3% PPA and 0.7%；
The raw material for preparing in middle layer is made of the VM 6102 of 74% EVA 00111 and 26%；
Internal layer prepares raw material by 64% MLLDPE 1018HA, the HDPE- of 35% MLLDPE 1018LA and 1%
F15 composition.
The preparation method of the cold stretching film of the present embodiment is same as Example 1, and details are not described herein.
Embodiment 4
The cold stretching film of the present embodiment, including outer layer, middle layer, internal layer three parts, 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
Material is made of the HDPE-F15 of 33% MLLDPE 1018LA, 66% MLLDPE1018HA, 0.8% PPA and 0.2%；
The raw material for preparing in middle layer is made of the VM 6102 of 73% EVA 00111 and 27%；
Internal layer prepares raw material by 60% MLLDPE 1018HA, 39.3% MLLDPE 1018LA's and 0.7%
HDPE-F15 composition.
The preparation method of the cold stretching film of the present embodiment is same as Example 1, and details are not described herein.
Embodiment 5
The cold stretching film of the present embodiment, including outer layer, middle layer, internal layer three parts, 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
Material is made of the HDPE-F15 of 38% MLLDPE 1018LA, 61% MLLDPE1018HA, 0.1% PPA and 0.9%；
The raw material for preparing in middle layer is made of the VM 6102 of 80% EVA00111 and 20%；
Internal layer prepares raw material by 66% MLLDPE 1018HA, 33.6% MLLDPE 1018LA's and 0.4%
HDPE-F15 composition.
The preparation method of the cold stretching film of the present embodiment is same as Example 1, and details are not described herein.
Embodiment 6
The cold stretching film of the present embodiment, including outer layer, middle layer, internal layer three parts, 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
Material is made of the HDPE-F15 of 33% MLLDPE 1018LA, 66% MLLDPE1018HA, 0.7% PPA and 0.3%；
The raw material for preparing in middle layer is made of the VM 6102 of 71% EVA00111 and 29%；
Internal layer prepares raw material by 60% MLLDPE 1018HA, 39.2% MLLDPE 1018LA's and 0.8%
HDPE-F15 composition.
The preparation method of the cold stretching film of the present embodiment is same as Example 1, and details are not described herein.
Embodiment 7
The cold stretching film of the present embodiment, including outer layer, middle layer, internal layer three parts, 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
Material is made of the HDPE-F15 of 22% MLLDPE 1018LA, 77% MLLDPE1018HA, 0.5% PPA and 0.5%；
The raw material for preparing in middle layer is made of the VM 6102 of 78% EVA00111 and 22%；
Internal layer prepares raw material by 63% MLLDPE 1018HA, the HDPE- of 36% MLLDPE 1018LA and 1%
F15 composition.
The preparation method of the cold stretching film of the present embodiment is same as Example 1, and details are not described herein.
Embodiment 8
The cold stretching film of the present embodiment, including outer layer, middle layer, internal layer three parts, 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
Material is made of the HDPE-F15 of 34% MLLDPE 1018LA, 65% MLLDPE1018HA, 0.5% PPA and 0.5%；
The raw material for preparing in middle layer is made of the VM 6102 of 70% EVA00111 and 30%；
Internal layer prepares raw material by 60% MLLDPE 1018HA, the HDPE- of 39% MLLDPE 1018LA and 1%
F15 composition.
The preparation method of the cold stretching film of the present embodiment is same as Example 1, and details are not described herein.
Comparative example 1
The cold stretching film of this comparative example, including outer layer, middle layer, internal layer three parts, 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
Material is made of the HDPE-F15 of 34% MLLDPE 1018LA, 65% MLLDPE1018HA, 1%；
The raw material for preparing in middle layer is made of the VM 6102 of 70% EVA00111 and 30%；
Internal layer prepares raw material by 60% MLLDPE 1018HA, the HDPE- of 39% MLLDPE 1018LA and 1%
F15 composition.
The preparation method of the cold stretching film of this comparative example is same as Example 1, and details are not described herein.This comparative example and implementation
It is that raw material and the proportion of outer layer are different in place of the difference of example 1.
Comparative example 2
The cold stretching film of this comparative example, including outer layer, middle layer, internal layer three parts, 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
Material is made of the PPA of 34% MLLDPE 1018LA, 65% MLLDPE1018HA, 1%；
The raw material for preparing in middle layer is made of the VM 6102 of 70% EVA 00111 and 30%；
Internal layer prepares raw material by 60% MLLDPE 1018HA, the HDPE- of 39% MLLDPE 1018LA and 1%
F15 composition.
The preparation method of the cold stretching film of this comparative example is same as Example 1, and details are not described herein.This comparative example and implementation
It is that raw material and the proportion of outer layer are different in place of the difference of example 1.
Comparative example 3
The cold stretching film of this comparative example, including outer layer, middle layer, internal layer three parts, 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
Material is made of the HDPE-F15 of 34% MLLDPE 1018LA, 65% MLLDPE1018HA, 0.5% PPA and 0.5%；
The raw material for preparing in middle layer is EVA 00111；
Internal layer prepares raw material by 60% MLLDPE 1018HA, the HDPE- of 39% MLLDPE 1018LA and 1%
F15 composition.
The preparation method of the cold stretching film of this comparative example is same as Example 1, and details are not described herein.This comparative example and implementation
It is that the raw material in middle layer is different in place of the difference of example 1.
Comparative example 4
The cold stretching film of this comparative example, including outer layer, middle layer, internal layer three parts, 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
Material is made of the HDPE-F15 of 34% MLLDPE 1018LA, 65% MLLDPE1018HA, 0.5% PPA and 0.5%；
The raw material for preparing in middle layer is VM 6102；
Internal layer prepares raw material by 60% MLLDPE 1018HA, the HDPE- of 39% MLLDPE 1018LA and 1%
F15 composition.
The preparation method of the cold stretching film of this comparative example is same as Example 1, and details are not described herein.This comparative example and implementation
It is that the raw material in middle layer is different in place of the difference of example 1.
Comparative example 5
The cold stretching film of this comparative example, including outer layer, middle layer, internal layer three parts, 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
Material is made of the HDPE-F15 of 34% MLLDPE 1018LA, 65% MLLDPE1018HA, 0.5% PPA and 0.5%；
The raw material for preparing in middle layer is made of the polyolefin elastomer (POE) of 70% EVA 00111 and 30%；
Internal layer prepares raw material by 60% MLLDPE 1018HA, the HDPE- of 39% MLLDPE 1018LA and 1%
F15 composition.
The preparation method of the cold stretching film of this comparative example is same as Example 1, and details are not described herein.This comparative example and implementation
It is that the raw material in middle layer is different in place of the difference of example 1.
Comparative example 6
The cold stretching film of this comparative example, including outer layer, middle layer, internal layer three parts, 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
Material is made of the HDPE-F15 of 34% MLLDPE 1018LA, 65% MLLDPE1018HA, 0.5% PPA and 0.5%；
The raw material for preparing in middle layer is made of the VM 6102 of 70% EVA 00111 and 30%；
Internal layer prepares raw material by 60% MLLDPE 1018HA, the HDPE- of 39% MLLDPE 1018LA and 1%
F15 composition.
The preparation method of the cold stretching film of this comparative example is same as Example 1, and details are not described herein.This comparative example and implementation
It is that the ratio of film gross weight shared by the weight of outer layer, middle layer, internal layer is different in place of the difference of example 1.
The performance of the embodiment 1-8 and comparative example 1-6 film prepared is tested, 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 layer, the weight of internal layer and every layer of raw material and proportion,
Cold stretching film obtained has good tensile property, and tensile strength is 58MPa or more, and elongation at break adds 668% or more
Film after work does not generate adhesion phenomenon.PPA and HDPE-F15 is mutually cooperateed with jointly as functional masterbatch, the two in cladding material
The extrusion performance for improving cold stretching film prevents the adhesion of film；The synergistic effect of EVA 00111 and VM 6102 makes in middle layer material
The elasticity of film, toughness enhancing, improve the tensile strength of film.
The Applicant declares that the present invention is explained by the above embodiments detailed process equipment and process flow of the invention,
But the present invention is not limited to the above detailed process equipment and process flow, that is, it is above-mentioned detailed not mean that the present invention must rely on
Process equipment and process flow could be implemented.It should be clear to those skilled in the art, 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 of the invention
Within protection scope and the open scope.
Claims (10)
1. a kind of cold stretching film, including outer layer, middle layer, internal layer three parts, which is characterized 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 MLLDPE 1018LA for preparing raw material and including 20~40% of the outer layer, 60~75% MLLDPE 1018HA, 0.1
The HDPE-F15 of~1% polyphthalamide PPA and 0.1~1%, the sum of the content of each component is in above-mentioned raw materials
100%；
The middle layer prepares the VM 6102 that raw material includes 70~80% EVA 00111 and 20~30%；
The internal layer prepare raw material include 50~70% MLLDPE 1018HA, 35~40% MLLDPE 1018LA and
0.1~1% HDPE-F15, the sum of content of each component is 100% in above-mentioned raw materials.
2. cold stretching film according to claim 1, which is characterized 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, which is characterized in that by weight percentage, the preparation of the outer layer
Raw material includes 25~35% MLLDPE 1018LA, 65~70% MLLDPE 1018HA, 0.2~0.8% poly- adjacent benzene two
The HDPE-F15 of formamide PPA and 0.2~0.6%, the sum of content of each component is 100% in above-mentioned raw materials.
4. cold stretching film according to claim 1 or 2, which is characterized in that by weight percentage, the preparation of the outer layer
Raw material includes 30% MLLDPE 1018LA, 69% MLLDPE 1018HA, the HDPE-F15 of 0.5% PPA and 0.5%.
5. cold stretching film according to claim 1 or 2, which is characterized in that by weight percentage, the preparation in the middle layer
Raw material includes the VM 6102 of 72~76% EVA 00111 and 22~26%.
6. cold stretching film according to claim 1 or 2, which is characterized in that by weight percentage, the preparation in the middle layer
Raw material includes the VM 6102 of 75% EVA 00111 and 25%.
7. cold stretching film according to claim 1 or 2, which is characterized in that by weight percentage, the preparation of the internal layer
Raw material includes 60~65% MLLDPE 1018HA, the HDPE- of 36~38% MLLDPE 1018LA and 0.3~0.6%
F15, the sum of content of each component is 100% in above-mentioned raw materials.
8. cold stretching film according to claim 1 or 2, which is characterized in that by weight percentage, the preparation of the internal layer
Raw material includes 60.8% MLLDPE 1018HA, the HDPE-F15 of 38.7% MLLDPE 1018LA and 0.5%.
9. the preparation method of cold stretching film described in one of -8 according to claim 1, which is characterized in that the preparation method includes
Following steps：
1) preparing after raw material mixes for the outer layer of formula ratio is prepared the outer layer raw mixture of cold stretching film, will be formulated by mixing
The middle layer of amount prepares the middle layer raw mixture that cold stretching film is prepared after raw material mixes, and the internal layer of formula ratio is prepared raw material
The internal layer raw mixture of cold stretching film is prepared after mixing；
2) ingredient mixes the outer layer raw mixture, middle layer raw mixture, internal layer raw material of the cold stretching film of step 1) preparation
Object carries out ingredient according to the ratio；
3) blown film forms the membrane material coextrusion blow after step 2) ingredient.
10. the preparation method of cold stretching film as claimed in claim 9, which is characterized in that in step 3), the coextrusion blow mistake
Three-layer co-extruded inflation film is added in outer layer raw mixture, middle layer raw mixture, internal layer raw mixture by Cheng Wei according to the ratio
Machine it is outer, in, in internal layer hopper, heat and be gradually warmed up, outer layer, middle layer, internal layer extrusion temperature control at 170~185 DEG C,
Cold stretching film is made through extrusion and blow molding.
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| 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 |
| CN109094162B (en) * | 2018-10-29 | 2020-11-10 | 昆山金盟塑料薄膜有限公司 | High-strength cold-stretched film and preparation method thereof |
| CN109094163B (en) * | 2018-10-29 | 2020-12-15 | 昆山金盟塑料薄膜有限公司 | High-strength 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 stretch 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 |
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