CN111320808A - Low-melting-point input packaging film for silicone rubber and preparation process thereof - Google Patents

Low-melting-point input packaging film for silicone rubber and preparation process thereof Download PDF

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CN111320808A
CN111320808A CN202010361404.9A CN202010361404A CN111320808A CN 111320808 A CN111320808 A CN 111320808A CN 202010361404 A CN202010361404 A CN 202010361404A CN 111320808 A CN111320808 A CN 111320808A
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ethylene
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CN111320808B (en
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周中华
任世强
张德刚
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Zhongplatinum New Materials Co ltd
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    • C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
    • C08J5/18—Manufacture of 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
    • 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
    • C08J2323/04—Homopolymers or copolymers of ethene
    • C08J2323/08—Copolymers of ethene
    • 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
    • C08J2423/04—Homopolymers or copolymers of ethene
    • C08J2423/06—Polyethene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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    • 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
    • C08J2423/04—Homopolymers or copolymers of ethene
    • C08J2423/08—Copolymers of ethene
    • 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
    • C08J2483/00—Characterised by the use of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen, or carbon only; Derivatives of such polymers
    • C08J2483/04—Polysiloxanes
    • 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
    • C08K13/00—Use of mixtures of ingredients not covered by one single of the preceding main groups, each of these compounds being essential
    • C08K13/02—Organic and inorganic ingredients
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    • 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
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/34—Silicon-containing compounds
    • C08K3/36—Silica
    • 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
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    • C08K5/04—Oxygen-containing compounds
    • C08K5/14—Peroxides
    • 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
    • C08K5/54—Silicon-containing compounds
    • C08K5/541—Silicon-containing compounds containing oxygen
    • C08K5/5415—Silicon-containing compounds containing oxygen containing at least one Si—O bond

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Abstract

The invention discloses a low-melting-point packaging film for silicone rubber, wherein the melting point of the low-melting-point packaging film for silicone rubber is 58-62 ℃; the transverse tensile strength is 19-23 Mpa; the longitudinal tensile strength is 20-24 Mpa; the transverse elongation at break is 760-810%; the longitudinal elongation at break is 690-725%, the low-melting packaging film prepared by the technical scheme can be used for packaging rubber raw materials, the product can be put into an internal mixer together with the rubber raw materials as a package, packaging garbage is not generated during use, the raw materials are saved, the process proportion is more accurate, the low-melting packaging film is an environment-friendly green product, the melting point of the low-melting packaging film is 58-62 ℃, and the requirements of a silicon rubber mixing process can be met.

Description

Low-melting-point input packaging film for silicone rubber and preparation process thereof
Technical Field
The invention relates to the technical field of new materials, in particular to a low-melting-point packaging film for silicone rubber and a preparation process thereof.
Background
The silicone rubber has excellent high and low temperature resistance, ageing resistance and chemical stability, can be widely applied to industries such as aviation, cables, electronics, electrical appliances, chemical engineering, instruments, cement, automobiles, buildings, food processing, medical appliances and the like, the production process of the silicone rubber is complex, the packaging modes of raw materials and auxiliaries for producing the silicone rubber in the prior art are all packaged in the form of packaging barrels or packaging bags, the materials need to be added into rubber mixing equipment during production, the packaging materials used for packaging the materials cannot be put into the rubber mixing equipment along with the materials, and then the waste packaging materials are discarded, the residual raw materials in the discarded packaging materials and the packaging materials can pollute and harm the environment, so that the raw material dust raising amount in the production environment is large, and the health of workers is seriously harmed.
In order to solve the above problems, a low-melting-point packaging film appears on the market, for example, the patent numbers are: 201611016879.4, discloses a low-melting packaging film and a low-melting packaging bag. The formula of the low-melting-point packaging film comprises the following components in percentage by mass: ethylene vinyl acetate copolymer 90%; 2% of silicon dioxide; 8 percent of composite open-ended master batch.
The low-melting-point film can also be used for packaging raw materials and additives for producing the silicon rubber, and the packaging bag can be put into rubber mixing equipment during production, so that packaging garbage can not be generated, and the low-melting-point film is environment-friendly and pollution-free.
However, the low-melting-point film has an excessively high melting point, cannot meet the requirement of the rubber mixing temperature of the silicone rubber, and has poor compatibility, and when the raw materials and the packing materials are put into rubber mixing equipment together for rubber mixing, the low-melting-point film cannot be effectively dissolved into the rubber, so that the quality of the rubber is affected, and the low-melting-point film has poor overall performance, low physical strength and poor impact resistance and is easy to break and leak.
Disclosure of Invention
The invention aims to solve the main technical problem of providing a low-melting-point packaging film for silicone rubber, which is environment-friendly, non-toxic, suitable for the technological requirements of the mixing temperature of silicone rubber, can be put into rubber mixing equipment along with materials, and can be compatible with the silicone rubber.
In order to solve the technical problems, the invention provides the following technical scheme:
a low-melting-point packaging film for silicone rubber, wherein the melting point of the low-melting-point packaging film for silicone rubber is 58-62 ℃; the transverse tensile strength is 19-23 Mpa; the longitudinal tensile strength is 20-24 Mpa; the transverse elongation at break is 760-810%; the longitudinal elongation at break is 690-725%.
The following is a further optimization of the above technical solution of the present invention:
the silicone rubber comprises the following components in percentage by weight:
5-15% of ethylene-vinyl acrylate copolymer, 10-20% of ethylene-vinyl acetate copolymer, 3-7% of low-density polyethylene, 3-7% of metallocene polyethylene, 55-65% of polyolefin elastomer and 5% of organic silicon master batch.
Further optimization: the organic silicon master batch specifically comprises the following components in parts by weight: 100 parts of polyolefin elastomer, 2-4 parts of vinyltriethoxysilane, 0.5 part of dicumyl peroxide, 5 parts of silicon dioxide and 30-35 parts of simethicone.
Further optimization: the silicone rubber comprises the following components in percentage by weight:
10% of ethylene-acrylic acid ethylene copolymer, 12% of ethylene-vinyl acetate copolymer, 4% of low-density polyethylene, 4% of metallocene polyethylene, 65% of polyolefin elastomer and 5% of organic silicon master batch;
the organic silicon master batch specifically comprises the following components in parts by weight: 100 parts of polyolefin elastomer, 2 parts of vinyltriethoxysilane, 0.5 part of dicumyl peroxide, 5 parts of silicon dioxide and 30 parts of dimethyl silicone oil.
Further optimization: the silicone rubber comprises the following components in percentage by weight:
8% of ethylene-acrylic acid ethylene copolymer, 12% of ethylene-vinyl acetate copolymer, 5% of low-density polyethylene, 5% of metallocene polyethylene, 65% of polyolefin elastomer and 5% of organic silicon master batch;
the organic silicon master batch specifically comprises the following components in parts by weight: 100 parts of polyolefin elastomer, 3 parts of vinyltriethoxysilane, 0.5 part of dicumyl peroxide, 5 parts of silicon dioxide and 35 parts of simethicone.
Further optimization: the silicone rubber comprises the following components in percentage by weight:
14% of ethylene-acrylic acid ethylene copolymer, 15% of ethylene-vinyl acetate copolymer, 3% of low-density polyethylene, 3% of metallocene polyethylene, 60% of polyolefin elastomer and 5% of organic silicon master batch;
the organic silicon master batch specifically comprises the following components in parts by weight: 100 parts of polyolefin elastomer, 4 parts of vinyltriethoxysilane, 0.5 part of dicumyl peroxide, 5 parts of silicon dioxide and 32.5 parts of simethicone.
Further optimization: the ethylene-vinyl acetate copolymer (EVA) has a VA content of 30-45%.
The invention also provides a preparation process of the low-melting-point packaging film which can be put into use for preparing the silicone rubber, and the preparation process specifically comprises the following steps:
1) preparing the organic silicon master batch: respectively weighing the polyolefin elastomer, the vinyltriethoxysilane, the dicumyl peroxide, the silicon dioxide and the dimethyl silicone oil according to the weight, adding the weighed materials into a mixer, mixing to obtain an organic silicon mixed material, pouring the organic silicon mixed material into a granulator, and performing extrusion granulation to obtain organic silicon master batches;
2) mixing materials, namely respectively weighing the ethylene-vinyl acrylate copolymer, the ethylene-vinyl acetate copolymer, the low-density polyethylene, the metallocene polyethylene, the polyolefin elastomer and the organic silicon master batch according to the weight, and putting the mixture into a mixer for mixing;
3) film blowing: and pouring the mixed material into a film blowing machine, heating and melting the mixed material by the film blowing machine, extruding and blowing to form a raw material film, cooling and shaping the raw material film, and then coiling to obtain the low-melting-point packaging film.
The following is a further optimization of the above technical solution of the present invention:
and 3) the film blowing expansion ratio of a film blowing machine of the film blowing machine in the step 3) is 5-7.
Further optimization: and cooling in the step 3) by cold air, wherein the cooling temperature is 15-20 ℃.
By adopting the technical scheme, the invention has the advantages of ingenious design and reasonable structure, can be used for packaging rubber raw materials, can be used as a package and put into an internal mixer together with the rubber raw materials, can not generate packaging garbage when in use, saves the raw materials, has more accurate process ratio, and is an environment-friendly green product.
And along with the reduction of the melting point of the film, the raw materials for preparing the low-melting-point film are not suitable for film blowing processing, and the mixing proportion of the various raw materials adopted by the invention changes the performance of the materials, so that the low-melting-point film is suitable for production by a blow molding method, and the production method is simple.
The low-melting-point packaging film has a melting point of 58-62 ℃, and can meet the requirements of a silicon rubber mixing process.
And the addition of low-density polyethylene (LDPE) and metallocene polyethylene (mPE) increases the overall physical strength of the low-melting packaging film, and the transverse and longitudinal tensile strength can be kept consistent.
The organic silicon master batch can improve the compatibility of polyolefin elastomer (POE) and silicon rubber, can be quickly blended into the rubber, and further cannot influence the performance of the rubber.
And the hydrophobicity of the organic silicon master batch can reduce the water vapor transmittance of the film, protect the raw materials from moisture absorption, and prevent insufficient vulcanization of the silicon rubber caused by high moisture.
The present invention will be further described with reference to the following examples.
Drawings
FIG. 1 is a DSC curve of example 1 of the present invention;
FIG. 2 is a DSC curve of example 2 of the present invention;
FIG. 3 is a DSC curve of example 3 of the present invention.
Detailed Description
Example 1:
a low-melting-point packaging film for silicone rubber comprises the following components in percentage by weight:
10% of ethylene-ethylene acrylate copolymer (EEA), 12% of ethylene-vinyl acetate copolymer (EVA), 4% of low-density polyethylene (LDPE), 4% of metallocene polyethylene (mPE), 65% of polyolefin elastomer (POE) and 5% of organic silicon master batch.
The ethylene-vinyl acetate copolymer (EVA) has a VA content of 33%.
The polyolefin elastomer (POE) is a high polymer of ethylene and octene.
The organic silicon master batch specifically comprises the following components in parts by weight: 100 parts of polyolefin elastomer (POE), 2 parts of vinyl triethoxysilane, 0.5 part of dicumyl peroxide (DCP), 5 parts of silicon dioxide and 30 parts of dimethyl silicone oil.
The ethylene-ethylene acrylate copolymer (EEA) is produced by the manufacturer of Dow chemical company of America under the trade mark of: ethylene-acrylic acid ethylene copolymer of EA 103.
The ethylene-vinyl acetate copolymer (EVA) was produced by a manufacturer of Letian chemical corporation of Korea under the brand number: ethylene-vinyl acetate copolymer of VE 810.
The Low Density Polyethylene (LDPE) is produced by China petrochemical company manufacturers with the brand numbers as follows: 2102 of TN 26.
The metallocene polyethylene (mPE) is produced by manufacturers of Exxon Mobil chemical company of America under the trade mark of: 1018 metallocene polyethylene.
The polyolefin elastomer (POE) is produced by the manufacturer of the Dow chemical company of America under the brand number: 8100.
The dicumyl peroxide (DCP) is a product normally sold on the market.
The preparation process of the low-melting-point packaging film for the silicone rubber specifically comprises the following steps:
1) preparing the organic silicon master batch: respectively weighing the polyolefin elastomer (POE), the vinyltriethoxysilane, the dicumyl peroxide (DCP), the silicon dioxide and the dimethyl silicone oil according to the weight, adding the weighed materials into a mixer, fully stirring and mixing the materials to obtain an organic silicon mixed material, and pouring the organic silicon mixed material into a granulator to extrude and granulate to obtain the organic silicon master batch.
The mixer in the step 1) is used for stirring and mixing for 25min, and the mixing temperature is normal temperature.
2) Mixing materials, namely respectively weighing the ethylene-ethylene acrylate copolymer (EEA), the ethylene-vinyl acetate copolymer (EVA), the low-density polyethylene (LDPE), the metallocene polyethylene (mPE), the polyolefin elastomer (POE) and the organic silicon master batch according to the weight, and putting the materials into a mixer for fully stirring and mixing.
The mixer in the step 2) is used for stirring and mixing for 25min, and the mixing temperature is normal temperature.
3) Film blowing: and pouring the mixed material into a film blowing machine, heating and melting the mixed material by the film blowing machine, extruding and blowing to form a raw material film, cooling and shaping the raw material film, and then coiling to obtain the low-melting-point packaging film.
And the film blowing expansion ratio of the film blowing machine in the step 3) is 5.
The cooling in the step 3) adopts cold air for cooling, and the cooling temperature is 15 ℃.
The prepared low-melting-point packaging film is a cylindrical film, and then can be thermally sealed to be made into packaging bags according to requirements, and can also be cut into automatic packaging films and other film coiled materials.
Example 2:
an investable low-melting-point packaging film for silicone rubber comprises the following components in percentage by weight:
8% of ethylene-ethylene acrylate copolymer (EEA), 12% of ethylene-vinyl acetate copolymer (EVA), 5% of low-density polyethylene (LDPE), 5% of metallocene polyethylene (mPE), 65% of polyolefin elastomer (POE) and 5% of silicone master batch.
The ethylene-vinyl acetate copolymer (EVA) has a VA content of 33%.
The polyolefin elastomer (POE) is a high polymer of ethylene and octene.
The organic silicon master batch specifically comprises the following components in parts by weight: 100 parts of polyolefin elastomer (POE), 3 parts of vinyl triethoxysilane, 0.5 part of dicumyl peroxide (DCP), 5 parts of silicon dioxide and 35 parts of dimethyl silicone oil.
The ethylene-ethylene acrylate copolymer (EEA) is produced by the manufacturer of Dow chemical company of America under the trade mark of: ethylene-acrylic acid ethylene copolymer of EA 103.
The ethylene-vinyl acetate copolymer (EVA) was produced by a manufacturer of Letian chemical corporation of Korea under the brand number: ethylene-vinyl acetate copolymer of VE 810.
The Low Density Polyethylene (LDPE) is produced by China petrochemical company manufacturers with the brand numbers as follows: 2102 of TN 26.
The metallocene polyethylene (mPE) is produced by manufacturers of Exxon Mobil chemical company of America under the trade mark of: 1018 metallocene polyethylene.
The polyolefin elastomer (POE) is produced by the manufacturer of the Dow chemical company of America under the brand number: 8100.
The dicumyl peroxide (DCP) is a product normally sold on the market.
The preparation process of the low-melting-point packaging film for the silicone rubber specifically comprises the following steps:
1) preparing the organic silicon master batch: respectively weighing the polyolefin elastomer (POE), the vinyltriethoxysilane, the dicumyl peroxide (DCP), the silicon dioxide and the dimethyl silicone oil according to the weight, adding the weighed materials into a mixer, fully stirring and mixing the materials to obtain an organic silicon mixed material, and pouring the organic silicon mixed material into a granulator to extrude and granulate to obtain the organic silicon master batch.
The mixer in the step 1) is used for stirring and mixing for 30min, and the mixing temperature is normal temperature.
2) Mixing materials, namely respectively weighing the ethylene-ethylene acrylate copolymer (EEA), the ethylene-vinyl acetate copolymer (EVA), the low-density polyethylene (LDPE), the metallocene polyethylene (mPE), the polyolefin elastomer (POE) and the organic silicon master batch according to the weight, and putting the materials into a mixer for fully stirring and mixing.
The mixer in the step 2) is used for stirring and mixing for 30min, and the mixing temperature is normal temperature.
3) Film blowing: and pouring the mixed material into a film blowing machine, heating and melting the mixed material by the film blowing machine, extruding and blowing to form a raw material film, cooling and shaping the raw material film, and then coiling to obtain the low-melting-point packaging film.
And the film blowing expansion ratio of the film blowing machine in the step 3) is 6.
The cooling in the step 3) adopts cold air for cooling, and the cooling temperature is 17 ℃.
The prepared low-melting-point packaging film is a cylindrical film, and then can be thermally sealed to be made into packaging bags according to requirements, and can also be cut into automatic packaging films and other film coiled materials.
Example 3:
an investable low-melting-point packaging film for silicone rubber comprises the following components in percentage by weight:
14% of ethylene-ethylene acrylate copolymer (EEA), 15% of ethylene-vinyl acetate copolymer (EVA), 3% of low-density polyethylene (LDPE), 3% of metallocene polyethylene (mPE), 60% of polyolefin elastomer (POE) and 5% of silicone master batch.
The ethylene-vinyl acetate copolymer (EVA) has a VA content of 33%.
The polyolefin elastomer (POE) is a high polymer of ethylene and octene.
The organic silicon master batch specifically comprises the following components in parts by weight: 100 parts of polyolefin elastomer (POE), 4 parts of vinyl triethoxysilane, 0.5 part of dicumyl peroxide (DCP), 5 parts of silicon dioxide and 32.5 parts of dimethyl silicone oil.
The ethylene-ethylene acrylate copolymer (EEA) is produced by the manufacturer of Dow chemical company of America under the trade mark of: ethylene-acrylic acid ethylene copolymer of EA 103.
The ethylene-vinyl acetate copolymer (EVA) was produced by a manufacturer of Letian chemical corporation of Korea under the brand number: ethylene-vinyl acetate copolymer of VE 810.
The Low Density Polyethylene (LDPE) is produced by China petrochemical company manufacturers with the brand numbers as follows: 2102 of TN 26.
The metallocene polyethylene (mPE) is produced by manufacturers of Exxon Mobil chemical company of America under the trade mark of: 1018 metallocene polyethylene.
The polyolefin elastomer (POE) is produced by the manufacturer of the Dow chemical company of America under the brand number: 8100.
The dicumyl peroxide (DCP) is a product normally sold on the market.
The preparation process of the low-melting-point packaging film for the silicone rubber specifically comprises the following steps:
1) preparing the organic silicon master batch: respectively weighing the polyolefin elastomer (POE), the vinyltriethoxysilane, the dicumyl peroxide (DCP), the silicon dioxide and the dimethyl silicone oil according to the weight, adding the weighed materials into a mixer, fully stirring and mixing the materials to obtain an organic silicon mixed material, and pouring the organic silicon mixed material into a granulator to extrude and granulate to obtain the organic silicon master batch.
The mixer in the step 1) is used for stirring and mixing for 35min, and the mixing temperature is normal temperature.
2) Mixing materials, namely respectively weighing the ethylene-ethylene acrylate copolymer (EEA), the ethylene-vinyl acetate copolymer (EVA), the low-density polyethylene (LDPE), the metallocene polyethylene (mPE), the polyolefin elastomer (POE) and the organic silicon master batch according to the weight, and putting the materials into a mixer for fully stirring and mixing.
The mixer in the step 2) is used for stirring and mixing for 35min, and the mixing temperature is normal temperature.
3) Film blowing: and pouring the mixed material into a film blowing machine, heating and melting the mixed material by the film blowing machine, extruding and blowing to form a raw material film, cooling and shaping the raw material film, and then coiling to obtain the low-melting-point packaging film.
And the film blowing expansion ratio of the film blowing machine in the step 3) is 7.
The cooling in the step 3) adopts cold air for cooling, and the cooling temperature is 20 ℃.
The prepared low-melting-point packaging film is a cylindrical film, and then can be thermally sealed to be made into packaging bags according to requirements, and can also be cut into automatic packaging films and other film coiled materials.
In order to better illustrate the overall performance of the low-melting-point packaging film, the melting point of the low-melting-point packaging film prepared in examples 1 to 3 is detected according to the national standard GB/T19466.3-2004 plastic differential scanning calorimetry.
The peak melting point is detected by adopting DSC equipment according to the national standard GB/T19466.3-2004 plastic Differential Scanning Calorimetry (DSC), wherein the types of the DSC equipment used in the detection are as follows: DSC-500A; the manufacturer: shanghai is a quasi-instrumentation and equipment Co.
Referring to fig. 1 to 3, the melting points of the low melting point packaging films manufactured in examples 1 to 3 were respectively detected; the detection steps are as follows: the starting temperature was room temperature, then to 180 ℃, where: the heating rate is 10 ℃/min, and the constant temperature time is 0 min.
After the detection is finished, as can be seen from fig. 1, the detected melting point of the low-melting packaging film prepared in example 1 is 58.80 ℃;
as can be seen from FIG. 2, the detected melting point of the low-melting packaging film prepared in example 2 is 60.29 ℃;
as can be seen from fig. 3, the low melting point packaging film produced in example 3 had a measured melting point of 60.94 ℃.
It can be seen that the low melting point packaging films prepared in the above examples 1 to 3 have stable melting points, and the low melting point packaging films can meet the process requirements of silicone rubber mixing.
To better explain the overall performance of the low-melting packaging films, the tensile strength of the low-melting packaging films produced in examples 1 to 3 was measured in accordance with GB/T1040.3-2006.
When the tensile strength of the whole low-melting-point packaging film manufactured in the embodiment 1-3 is detected according to GB/T1040.3-2006, the width of a sample is 15mm, and the test speed (no load) is 500 mm/min;
the detection equipment adopts: the test is carried out by an electronic tensile testing machine with the model number of GBL-L produced by Guangzhou interstagline packaging equipment company Limited, and the test data is as follows:
Figure 664196DEST_PATH_IMAGE002
through the detection data, the overall tensile strength and the elongation at break of the low-melting-point packaging film manufactured by the manufacturing method are higher than the national standard and meet the requirements of the national standard.
It will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in the embodiments described above without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims.

Claims (10)

1. A low-melting-point input packaging film for silicone rubber is characterized in that: the melting point of the silicon rubber, which can be put into a low-melting-point packaging film, is 58-62 ℃; the transverse tensile strength is 19-23 Mpa; the longitudinal tensile strength is 20-24 Mpa; the transverse elongation at break is 760-810%; the longitudinal elongation at break is 690-725%.
2. The investable low-melting-point packaging film for silicone rubber according to claim 1, wherein: the paint comprises the following components in percentage by weight:
5-15% of ethylene-vinyl acrylate copolymer, 10-20% of ethylene-vinyl acetate copolymer, 3-7% of low-density polyethylene, 3-7% of metallocene polyethylene, 55-65% of polyolefin elastomer and 5% of organic silicon master batch.
3. The investable low-melting-point packaging film for silicone rubber according to claim 2, wherein: the organic silicon master batch specifically comprises the following components in parts by weight: 100 parts of polyolefin elastomer, 2-4 parts of vinyltriethoxysilane, 0.5 part of dicumyl peroxide, 5 parts of silicon dioxide and 30-35 parts of simethicone.
4. The investable low-melting-point packaging film for silicone rubber according to claim 3, wherein: the paint comprises the following components in percentage by weight:
10% of ethylene-acrylic acid ethylene copolymer, 12% of ethylene-vinyl acetate copolymer, 4% of low-density polyethylene, 4% of metallocene polyethylene, 65% of polyolefin elastomer and 5% of organic silicon master batch;
the organic silicon master batch specifically comprises the following components in parts by weight: 100 parts of polyolefin elastomer, 2 parts of vinyltriethoxysilane, 0.5 part of dicumyl peroxide, 5 parts of silicon dioxide and 30 parts of dimethyl silicone oil.
5. The investable low-melting-point packaging film for silicone rubber according to claim 4, wherein: the paint comprises the following components in percentage by weight:
8% of ethylene-acrylic acid ethylene copolymer, 12% of ethylene-vinyl acetate copolymer, 5% of low-density polyethylene, 5% of metallocene polyethylene, 65% of polyolefin elastomer and 5% of organic silicon master batch;
the organic silicon master batch specifically comprises the following components in parts by weight: 100 parts of polyolefin elastomer, 3 parts of vinyltriethoxysilane, 0.5 part of dicumyl peroxide, 5 parts of silicon dioxide and 35 parts of simethicone.
6. The investable low-melting-point packaging film for silicone rubber according to claim 5, wherein: the paint comprises the following components in percentage by weight:
14% of ethylene-acrylic acid ethylene copolymer, 15% of ethylene-vinyl acetate copolymer, 3% of low-density polyethylene, 3% of metallocene polyethylene, 60% of polyolefin elastomer and 5% of organic silicon master batch;
the organic silicon master batch specifically comprises the following components in parts by weight: 100 parts of polyolefin elastomer, 4 parts of vinyltriethoxysilane, 0.5 part of dicumyl peroxide, 5 parts of silicon dioxide and 32.5 parts of simethicone.
7. The investable low-melting-point packaging film for silicone rubber according to claim 6, wherein: the ethylene-vinyl acetate copolymer (EVA) has a VA content of 30-45%.
8. The process for preparing a low-melting-point investable packaging film for silicone rubber according to any one of claims 1 to 7, wherein: the preparation process specifically comprises the following steps:
1) preparing the organic silicon master batch: respectively weighing the polyolefin elastomer, the vinyltriethoxysilane, the dicumyl peroxide, the silicon dioxide and the dimethyl silicone oil according to the weight, adding the weighed materials into a mixer, mixing to obtain an organic silicon mixed material, pouring the organic silicon mixed material into a granulator, and performing extrusion granulation to obtain organic silicon master batches;
2) mixing materials, namely respectively weighing the ethylene-vinyl acrylate copolymer, the ethylene-vinyl acetate copolymer, the low-density polyethylene, the metallocene polyethylene, the polyolefin elastomer and the organic silicon master batch according to the weight, and putting the mixture into a mixer for mixing;
3) film blowing: and pouring the mixed material into a film blowing machine, heating and melting the mixed material by the film blowing machine, extruding and blowing to form a raw material film, cooling and shaping the raw material film, and then coiling to obtain the low-melting-point packaging film.
9. The investable low-melting-point packaging film for silicone rubber according to claim 8, wherein: and the film blowing expansion ratio of the film blowing machine in the step 3) is 5-7.
10. The investable low-melting-point packaging film for silicone rubber according to claim 9, wherein: and cooling in the step 3) by cold air, wherein the cooling temperature is 15-20 ℃.
CN202010361404.9A 2020-04-30 2020-04-30 Low-melting-point input packaging film for silicone rubber and preparation process thereof Active CN111320808B (en)

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Publication number Priority date Publication date Assignee Title
CN115122738A (en) * 2022-06-27 2022-09-30 江门市华龙膜材股份有限公司 Rubber banburying packaging film and preparation method thereof

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CN104893062A (en) * 2014-08-19 2015-09-09 安庆市兴丰工贸有限公司 Transparent and low-melting-point PE (polyethylene) plastic film
CN109880224A (en) * 2019-03-01 2019-06-14 江苏嘉好热熔胶股份有限公司 A kind of hot melt adhesive composite packaging membrane material and preparation method thereof

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JP2000127237A (en) * 1998-10-23 2000-05-09 Chuo Kagaku Co Ltd Thermoforming sheet, talc container for food packaging, and method of manufacturing the container
CN104893062A (en) * 2014-08-19 2015-09-09 安庆市兴丰工贸有限公司 Transparent and low-melting-point PE (polyethylene) plastic film
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Publication number Priority date Publication date Assignee Title
CN115122738A (en) * 2022-06-27 2022-09-30 江门市华龙膜材股份有限公司 Rubber banburying packaging film and preparation method thereof
CN115122738B (en) * 2022-06-27 2023-08-11 江门市华龙膜材股份有限公司 Rubber banburying packaging film and preparation method thereof

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