CN110343335A - A kind of heat-resistant label film and preparation method thereof - Google Patents
A kind of heat-resistant label film and preparation method thereof Download PDFInfo
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- CN110343335A CN110343335A CN201910665264.1A CN201910665264A CN110343335A CN 110343335 A CN110343335 A CN 110343335A CN 201910665264 A CN201910665264 A CN 201910665264A CN 110343335 A CN110343335 A CN 110343335A
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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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F3/00—Labels, tag tickets, or similar identification or indication means; Seals; Postage or like stamps
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2323/10—Homopolymers or copolymers of propene
- C08J2323/12—Polypropene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2423/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2423/10—Homopolymers or copolymers of propene
- C08J2423/14—Copolymers of propene
-
- 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
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/09—Carboxylic acids; Metal salts thereof; Anhydrides thereof
- C08K5/098—Metal salts of carboxylic acids
-
- 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
- C08K5/00—Use of organic ingredients
- C08K5/49—Phosphorus-containing compounds
- C08K5/51—Phosphorus bound to oxygen
- C08K5/52—Phosphorus bound to oxygen only
- C08K5/521—Esters of phosphoric acids, e.g. of H3PO4
- C08K5/523—Esters of phosphoric acids, e.g. of H3PO4 with hydroxyaryl compounds
Abstract
The present invention discloses a kind of heat-resistant label film and preparation method thereof, and the raw material weight percent includes following components: 0.1~1% nucleating agent, 10~20% binary copolymerization polypropylene and 8~10% propylene-octene Copolymer, and surplus is homopolypropylene.Nucleating agent in heat-resistant label film of the present invention makes crystal grain size is more fine and closely woven uniformly to reduce the mist degree due to caused by scattering, and gloss and transparency rise, and can also improve tensile strength, the elongation at break of heat-resistant label film.Binary copolymerization polypropylene makes label film have preferable heat resistance, and is not susceptible to plastic deformation at high temperature.Propylene-octene Copolymer improves yield strength, elongation at break and the heat resistance of label film.And emboss steel rider and rubber roller in roller group make label film obtain good glossiness while, in process to embossing roller group damage it is smaller.It is heated by the three-stage of single screw extrusion machine, makes raw material plasticizing completely, finished product heat-resistant label film has preferable intensity, toughness and heat resistance.
Description
Technical field
The present invention relates to label technical field of membrane more particularly to a kind of heat-resistant label film and preparation method thereof.
Background technique
Label film is usually used in the packaging material of varieties of food items and articles for daily use, is mainly used as shrinking set, completely seals label, valve protection cap
With bottle cap sealing etc., compared with traditional label material, the compactness of label film is more preferable, and transparency is higher, packing material it is visual
It is more preferable to change effect；Also there is preferable glossiness and wearability simultaneously, be widely applied in recent years.
Since packaging material may apply in various temperature environments, such as: carry out heating surface with mark using tool
Label film cooks food, needs to reach the demand that 100 DEG C of temperature is just able to satisfy such packaging, and existing label film heat resistance
It is poor, at too high a temperature using frequently can lead to packaging material deform, go bad, fail, aging etc., to be printed on
Therefore the pattern for packing film surface also changes, influence the packaging effect of product.
Summary of the invention
The main object of the present invention is to provide a kind of heat-resistant label film, it is intended to which the heat resistance for improving existing label film bad is led
Cause label film use easily deformed under the high temperature conditions in outer packing, aging and fail the technical issues of.
To achieve the above object, the present invention proposes a kind of heat-resistant label film, and the raw material weight percent includes following
Component: 0.1~1% nucleating agent, 10~20% binary copolymerization polypropylene and 8~10% propylene-octene Copolymer, surplus
For homopolypropylene.
Preferably, the nucleating agent is dibenzal sorbitol and its derivative, aromatic radical phosphate ester salt, substituted benzoic acid salt
At least one of with carboxylic metallic salt.
Preferably, the heat-resistant label film with a thickness of 50~90 μm.
The invention also provides a kind of preparation methods of heat-resistant label film, comprising the following steps:
Dedusting: processing is dusted to it using compressed air after raw material is mixed evenly；
Extrusion plasticizing: the raw material Jing Guo dust removal process is added to the feed end of extruder, forms melt through fusion plastification；
Cooling and shaping: it by the melt conveying to roller group is embossed, is quickly cooled down and is formed for forming film；
Trimming and sided corona treatment: being directed into bead cutter for the film, trimming processing is carried out to film, by the thin of trimming
Film passes through corona machine again and carries out sided corona treatment；
Crimping: being directed into winder for the film after sided corona treatment, rolling to obtain the heat-resistant label film.
Preferably, the embossing roller group is made of steel rider disposed in parallel and rubber roller；The cooling temperature of the steel rider is 28
~32 DEG C, the cooling temperature of the rubber roller is 18~22 DEG C.
Preferably, the extruder is three-stage heating: feeding section temperature is 180~200 DEG C；Melting section temperature is 200
~230 DEG C；Homogenizing zone temperature is 240~270 DEG C；The die head temperature of the extruder is 250~275 DEG C.
Preferably, the steel rider is mirror surface steel rider or frosted steel rider.
Preferably, the power of the sided corona treatment is 600~1200W, 25~60m/min of line speed.
Preferably, the dust removal process further includes that primary drying is carried out to raw material, and the temperature of primary drying is 70~90 DEG C,
The time of primary drying is 30~120min.
Compared with prior art, technical solution of the present invention has the advantages that
1. keeping the crystal grain size in heat-resistant label film more fine and closely woven uniform, label film is micro- by the addition of nucleating agent
Crystallization reduces the mist degree due to caused by scattering, so that gloss and transparency rise, since the crystallite quantity in label film increases
Add, so that the nucleating agent of heat-resistant label film can also improve the tensile strength of heat-resistant label film, elongation at break.It is total by binary
Gather polyacrylic addition so that label film have preferable heat resistance, and at high temperature the creep-resistant property of heat-resistant label film compared with
It is good, it is not susceptible to plastic deformation, is prolonged its service life.By the addition of propylene-octene Copolymer, bending for material can be improved
Take intensity and elongation at break.Since homopolypropylene can generate crystallization under the action of nucleating agent, label film can be improved
Heat resistance.
2. being added while so that label film is obtained good glossiness by the setting of steel rider and rubber roller in embossing roller group
It is smaller to the damage of embossing roller group during work.
3. the three-stage by single screw extrusion machine heats, make raw material plasticizing completely, finished product heat-resistant label film has preferable
Intensity, toughness and heat resistance.
Specific embodiment
The technical scheme in the embodiments of the invention will be clearly and completely described below, it is clear that described implementation
Example is only a part of the embodiments of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, this field is general
Logical technical staff every other embodiment obtained without creative efforts belongs to what the present invention protected
Range.
It in addition, the technical solution between each embodiment can be combined with each other, but must be with ordinary skill
Based on personnel can be realized, this technical side will be understood that when the combination of technical solution appearance is conflicting or cannot achieve
The combination of case is not present, also not the present invention claims protection scope within.
The present invention proposes a kind of heat-resistant label film, and the raw material weight percent includes following components: 0.1~1%
Nucleating agent, 10~20% binary copolymerization polypropylene and 8~10% propylene-octene Copolymer, surplus are homopolypropylene.
The addition of nucleating agent can be such that the mist degree of heat-resistant label film reduces, thus on the gloss and transparency of heat-resistant label film
It rises, because of the presence of nucleating agent, increases the quantity at nucleus, avoid the formation of big spherocrystal, make the crystal in heat-resistant label film
Particle size is more fine and closely woven and uniform, label film controlled micro crystallization, and crystallizes the mist degree uniformly reduced due to caused by scattering, due to
Crystallite quantity in label film increases, and nucleating agent can also improve the tensile strength of heat-resistant label film, elongation at break.It is being nucleated
In the case that agent dosage is fewer, effect is improved to the heat sealability of label film, and storage stability is also preferable.Work as nucleating agent
When additional amount is in 0.1~1%, the coefficient of friction of label film is stepped up, and the production procedure of heat-resistant label film is more smoothly.
The toughness and intensity of heat-resistant label film can be improved in the binary copolymerization polypropylene that weight percent is 10~20%, makes
Label film has preferable heat resistance, maximum operating temperature can achieve 100 DEG C, at a higher temperature heat-resistant label film
Creep-resistant property is preferable, is not susceptible to plastic deformation, extends the service life of heat-resistant label film, and makes heat-resistant label obtained
Film has the preferable transparency.
The propylene-octene Copolymer that weight percent is 8~10% has certain crystallizing power, since octene is being copolymerized
Intramolecular and intermolecular distribution are not fully uniform in object, and there are crystallizable propylene sequences, therefore are copolymerized for propylene-octene
Object generates eutectic and creates condition, and the yield strength and elongation at break of material can be improved.Homopolypropylene can be improved resistance to
The hardness of thermal label film, 155 DEG C of softening point temperature or so of homopolypropylene, heat distortion temperature is 115~135 DEG C, due to equal
Poly- polypropylene can generate crystallization under the action of nucleating agent, and crystallization degree is higher, and the heat resistance of label film is better, therefore homopolymerization
It is polyacrylic to add the heat resistance that can be further improved label film.From the point of view of the heat resistance to label film improves degree,
Homopolypropylene > binary copolymerization polypropylene > propylene-octene Copolymer.
The nucleating agent is dibenzal sorbitol and its derivative, aromatic radical phosphate ester salt, substituted benzoic acid salt and carboxylic acid
At least one of metal salt.
Dibenzal sorbitol and its derivative in nucleating agent can improve the impact resistance of heat-resistant label film, two benzal sorbs
Alcohol and its derivative and polypropylene have preferable compatibility, acrylic sphere crystalline substance can be made to become tiny and close, when by outer
When power is impacted, be conducive to the transmitting of polypropylene particles ambient stress concentration, make stress dispersion small size interface diffusion, the energy of consumption
Amount is bigger, thus can improve the impact strength of heat-resistant label film.And it is added with dibenzal sorbitol and its derivative, can be led to
It crosses induction and forms α nucleus, rigid network structure has " self-locking effect ", and the tensile strength of heat-resistant label film and curved can be improved
Qu Qiangdu, while the transparency of label film, glossiness can also be improved.The fusing point of aromatic radical phosphate ester salt in nucleating agent is lower,
Dispersibility in the feed preferably, at higher with efficiency, can improve polyacrylic crystalline texture, the weight of less polypropylene segment
Row increases the dimensional stability of heat-resistant label film under the high temperature conditions.Substituted benzoic acid salt in nucleating agent, polyacrylic spiral
Pendant methyl is generally arranged on the phenyl ring of nucleating agent in structure, and main chain then interacts with phenyl ring surface and crystallizes.Nucleating agent
In carboxylic metallic salt, the beta crystal relative amount in homopolypropylene and binary copolymerization polypropylene is larger, and stability is good, point
Temperature > 300 DEG C are solved, and the toughness of heat-resistant label film can also be improved.
Optionally, the heat-resistant label film with a thickness of 50~90 μm.When the thickness of heat-resistant label film is less than 50 μm,
Tensile strength and breaking strength do not reach requirement；When the thickness of heat-resistant label film is greater than 90 μm, transparency is poor and makes
Standby used raw material is more, therefore label film of the thickness in 50~90 μ ms can guarantee the same of heat resistance and intensity
When, production cost is relatively low.
The present invention also proposes a kind of preparation method of heat-resistant label film, comprising the following steps:
Dedusting: processing is dusted to it using compressed air after raw material is mixed evenly；
Extrusion plasticizing: the raw material Jing Guo dust removal process is added to the feed end of extruder, forms melt through fusion plastification；
Cooling and shaping: it by the melt conveying to roller group is embossed, is quickly cooled down and is formed for forming film；
Trimming and sided corona treatment: being directed into bead cutter via traction roller for the film, carries out trimming processing, warp to film
The film for crossing trimming passes through corona machine again and carries out sided corona treatment；
Crimping: being directed into winder via traction roller for the film after sided corona treatment, rolling to obtain the heat-resistant label
Film.
Specifically, each raw material is weighed by mass percentage and is uniformly mixed, the dust removal process in technical solution of the present invention
It mainly prevents the dust impurities contained in raw material from polluting raw material, influences the transparency of label film product.Then feedstock transportation is extremely
Single screw extrusion machine, into after the feed end of extruder, since extruder is provided with higher temperature, while the screw rod of extruder
It in continuous rotation, stirring and squeezes, raw material is plasticized melting in an extruder and forms melt, and melt is from single screw extrusion machine
It after die head is extruded, is cast in the embossing roller group of smooth rotation, compressed air is blown to bath surface by puff prot, keeps melt tight
It is attached to embossing roller group surface, is formed for forming film by fast cooling.Film is after the sur-face peeling of embossing roller group, then is delivered to and cuts
Side machine, the film memory trimming processing uneven to edge, the film after the completion of handling through trimming are delivered to corona machine and carry out corona
After electrostatic is eliminated in processing, then it is delivered to winder, obtains finished product heat-resistant label film.
The high energy particle that corona machine is applied quick washing film under the action of strong electrical field makes film surface molecules chain
Chemical bond rupture and degrade, be also accompanied by the generation of ozone during discharge, film surface molecular oxidation can be made and generated
Polarity, surface tension improve.And the label film surface Jing Guo sided corona treatment has good printing adaptability, is suitble to various oil
Ink and mode of printing.
Optionally, the embossing roller group is made of steel rider disposed in parallel and rubber roller；The cooling temperature of the steel rider is 28
~32 DEG C, the cooling temperature of the rubber roller is 18~22 DEG C.Steel rider has preferable hardness and brightness, so label film is passing through
Good glossiness can be obtained when the surface of steel rider, facilitate the subsequent printing of label film, the processes such as gold stamping.Due to obtained
Label film product thickness is in the range of 50~90 μm, when carrying out cooling and shaping to label film using two steel riders, between steel rider
Gap it is too small, be easy bad and cause the collision between two groups of steel riders due to controlling in process of production, embossing roller group made
At damage, or even the stability of product is influenced, therefore steel rider and rubber roller composition embossing roller group, the influence generated in collision are set
It is opposite to reduce.Specifically, rubber roller is the fine grinding mastic roller that surface fineness degree is 800 mesh.
Optionally, the extruder is three-stage heating: feeding section temperature is 180~200 DEG C；Melting section temperature is 200
~230 DEG C；Homogenizing zone temperature is 240~270 DEG C；The die head temperature of extruder is 250~275 DEG C.The temperature of feeding section is set
It is relatively low, label film raw material is melted in early stage this is because temperature is excessively high, so that undercompounding, plasticizing is uneven,
And also result in raw material will do it decomposition in extrusion process, cause to skid, and cause pressure oscillation when squeezing out.Melt section
Temperature has opposite raising compared with feeding section, is only reached because label membrane material needs to realize plasticizing in this stage
It just can ensure that most raw material is plasticized to certain temperature.Temperature of the temperature of homogenizing zone in three sections is set as most
Height is because raw material has largely been plasticized melting section, and wherein fraction macromolecule is opened compared with Gao Erwei due to plasticization temperature
Beginning to be plasticized, this part material for entering to homogenizing zone, but not being plasticized will cause the unstable quality of final label film product, because
The plasticization temperature of this homogenizing zone is set as highest, is to extend the fusion time of raw material to realize abundant plasticizing.
The die head of single screw extrusion machine is burnt greatly than the interior specific surface of extruder, therefore generally compares extruder in set temperature
Internal temperature is slightly higher or identical, is conducive to flowing of the melt in the die head of single screw extrusion machine in this way, make its it is evenly dispersed and
It squeezes out.
Optionally, the steel rider is mirror surface steel rider or frosted steel rider.In this way, using mirror surface steel rider especially high brightness mirror
When the steel rider of face, the surface of label film product can be made smooth, there is good gloss and brightness.And when using frosted steel rider,
Heat-resistant label film has matt effect, using different steel rider frosted patterns, label film can be made to have different surface effects.
Optionally, the power of the sided corona treatment is 600~1200W, 25~60m/min of line speed.Due to heat-resisting
The thickness of label film is different, when label film thickness obtained is thicker, the power of sided corona treatment and larger at producing line speed, instead
It is then smaller.
Further, the dust removal process further includes that primary drying is carried out to raw material, and the temperature of primary drying is 70~90
DEG C, the time of primary drying is 30~120min.If the moisture in raw material can make to mix uneven formation agglomeration when more, lead
It causes the extrusion plasticizing stage to block the discharge port of single screw extrusion machine, makes to feed unsmooth, cause the wave of extrusion pressure and die pressure
It is dynamic, cause uneven thickness, it is therefore desirable to primary drying be carried out to raw material, prevent excess moisture from causing to agglomerate.
Technical solution of the present invention is described in further detail below in conjunction with specific embodiment, it should be understood that following real
It applies example to be only used to explain the present invention, be not intended to limit the present invention.
Embodiment 1
Dedusting: 79% homopolypropylene, 12.8% binary copolymerization polypropylene, 8% propylene-octene Copolymer are weighed
Carboxylic metallic salt nucleating agent with 0.2%, is dusted processing to it using compressed air after raw material is mixed evenly, to dedusting
Processed raw material carries out primary drying, and drying temperature is 75 DEG C, drying time 80min；
Extrusion plasticizing: the raw material Jing Guo dust removal process is added to the feed end of single screw extrusion machine, single screw extrusion machine
Feeding section temperature be 200 DEG C, melt section temperature be 225 DEG C, homogenizing zone temperature be 250 DEG C, the die head temperature of single screw extrusion machine
Degree is 255 DEG C, and raw material forms melt through fusion plastification；
Cooling and shaping: the embossing roller group that the melt conveying to mirror surface steel rider disposed in parallel and rubber roller are formed, mirror surface
The cooling temperature of steel rider is 29 DEG C, and the cooling temperature of rubber roller is 20 DEG C, is quickly cooled down and is formed for forming film；
Trimming and sided corona treatment: being directed into bead cutter via traction roller for the film, carries out trimming processing, warp to film
The film for crossing trimming carries out sided corona treatment by corona machine again, and the power of sided corona treatment is 900W, line speed 50m/
min；
Crimping: being directed into winder via traction roller for the film after sided corona treatment, rolling to obtain the heat-resistant label
Film.
Embodiment 2
Dedusting: weigh 70% homopolypropylene, 19.9% binary copolymerization polypropylene, 10% propylene-octene copolymerization
Object and 0.1% aromatic radical phosphate ester salt nucleating agent, processing is dusted to it using compressed air after raw material is mixed evenly,
Primary drying is carried out to the raw material that dust removal process is crossed, drying temperature is 82 DEG C, drying time 90min；
Extrusion plasticizing: the raw material Jing Guo dust removal process is added to the feed end of single screw extrusion machine, single screw extrusion machine
Feeding section temperature be 190 DEG C, melt section temperature be 210 DEG C, homogenizing zone temperature be 240 DEG C, the die head temperature of single screw extrusion machine
Degree is 250 DEG C, and raw material forms melt through fusion plastification；
Cooling and shaping: the embossing roller group that the melt conveying to frosted steel rider disposed in parallel and rubber roller are formed, mirror surface
The cooling temperature of steel rider is 28 DEG C, and the cooling temperature of rubber roller is 22 DEG C, is quickly cooled down and is formed for forming film；
Trimming and sided corona treatment: being directed into bead cutter via traction roller for the film, carries out trimming processing, warp to film
The film for crossing trimming carries out sided corona treatment by corona machine again, and the power of sided corona treatment is 780W, line speed 40m/
min；
Crimping: being directed into winder via traction roller for the film after sided corona treatment, rolling to obtain the heat-resistant label
Film.
The beneficial effect of embodiment in order to better illustrate the present invention, the present invention are arranged one group of comparative example and test: with a thickness of
70 μm, common untreated label film.Embodiment 1-2 and comparative example are tested for the property, test result is as follows table (its
In, MD indicates longitudinal, and TD is indicated laterally):
1 heat-resistant label film properties test result of table
It can be seen that heat-resistant label film of the present invention from the test result of table 1 to place in 100 DEG C of hot-air
After 5min, percent thermal shrinkage is smaller, and heat resistance is good, and its mechanical strength is also significantly improved compared with comparative example.Using of the invention
Composition of raw materials and preparation method thereof, the nucleating agent of addition can make the crystal grain size in heat-resistant label film more fine and closely woven and equal
It is even, and reduce the mist degree due to caused by scattering.The polyacrylic addition of binary copolymerization has label film preferable heat-resisting
Property, and the creep-resistant property of heat-resistant label film at high temperature is preferable, is not susceptible to plastic deformation.Propylene-octene Copolymer adds
Add, the yield strength and elongation at break of heat-resistant label film can be improved.Due to homopolypropylene meeting under the action of nucleating agent
Crystallization is generated, the heat resistance of label film may further be improved.
The above description is only a preferred embodiment of the present invention, is not intended to limit the scope of the invention, all at this
Under the inventive concept of invention, using equivalent structure transformation made by present specification, or directly/it is used in other indirectly
Relevant technical field is included in scope of patent protection of the invention.
Claims (9)
1. a kind of heat-resistant label film, which is characterized in that the raw material weight percent includes following components: 0.1~1% at
Core agent, 10~20% binary copolymerization polypropylene and 8~10% propylene-octene Copolymer, surplus are homopolypropylene.
2. heat-resistant label film according to claim 1, it is characterised in that: the nucleating agent is dibenzal sorbitol and its spreads out
Biology, aromatic radical phosphate ester salt, at least one of substituted benzoic acid salt and carboxylic metallic salt.
3. heat-resistant label film according to claim 1, it is characterised in that: the heat-resistant label film with a thickness of 50~90 μ
m。
4. a kind of preparation method of the heat-resistant label film as described in claim 1-3, which comprises the following steps:
Dedusting: processing is dusted to it using compressed air after raw material is mixed evenly；
Extrusion plasticizing: the raw material Jing Guo dust removal process is added to the feed end of extruder, forms melt through fusion plastification；
Cooling and shaping: it by the melt conveying to roller group is embossed, is quickly cooled down and is formed for forming film；
Trimming and sided corona treatment: being directed into bead cutter for the film, carries out trimming processing to film, the film by trimming is again
Sided corona treatment is carried out by corona machine；
Crimping: being directed into winder for the film after sided corona treatment, rolling to obtain the heat-resistant label film.
5. the preparation method of heat-resistant label film according to claim 4, it is characterised in that: the embossing roller group by setting in parallel
Steel rider and the rubber roller composition set；
The cooling temperature of the steel rider is 28~32 DEG C, and the cooling temperature of the rubber roller is 18~22 DEG C.
6. the preparation method of heat-resistant label film according to claim 4, it is characterised in that: the extruder adds for three-stage
Temperature: feeding section temperature is 180~200 DEG C, and melting section temperature is 200~230 DEG C, and homogenizing zone temperature is 240~270 DEG C；
The die head temperature of the extruder is 250~275 DEG C.
7. the preparation method of heat-resistant label film according to claim 5, it is characterised in that: the steel rider is mirror surface steel rider,
Or frosted steel rider.
8. the preparation method of heat-resistant label film according to claim 4, it is characterised in that: the power of the sided corona treatment is
600~1200W, 25~60m/min of line speed.
9. the preparation method of heat-resistant label film according to claim 4, it is characterised in that: the dust removal process further includes pair
Raw material carries out primary drying, and the temperature of primary drying is 70~90 DEG C, and the time of primary drying is 30~120min.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0251540A (en) * | 1988-08-15 | 1990-02-21 | Teijin Ltd | Easily bondable polyester film |
| CN1659030A (en) * | 2002-06-26 | 2005-08-24 | 艾利丹尼森公司 | Oriented films comprising polypropylene/olefin elastomer blends |
| CN104788825A (en) * | 2015-03-31 | 2015-07-22 | 天津金发新材料有限公司 | Transparent polypropylene with high fluidity and high heat resistance and preparation method thereof |
| CN105623090A (en) * | 2016-02-02 | 2016-06-01 | 广东吉邦士新材料股份有限公司 | Heat-resistant polypropylene blended particles and preparation method thereof |
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2019
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| JPH0251540A (en) * | 1988-08-15 | 1990-02-21 | Teijin Ltd | Easily bondable polyester film |
| CN1659030A (en) * | 2002-06-26 | 2005-08-24 | 艾利丹尼森公司 | Oriented films comprising polypropylene/olefin elastomer blends |
| CN104788825A (en) * | 2015-03-31 | 2015-07-22 | 天津金发新材料有限公司 | Transparent polypropylene with high fluidity and high heat resistance and preparation method thereof |
| CN105623090A (en) * | 2016-02-02 | 2016-06-01 | 广东吉邦士新材料股份有限公司 | Heat-resistant polypropylene blended particles and preparation method thereof |
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