CN111675868A - High-glossiness low-transmittance PVC (polyvinyl chloride) base material and preparation method thereof - Google Patents
High-glossiness low-transmittance PVC (polyvinyl chloride) base material and preparation method thereof Download PDFInfo
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- C08J2451/00—Characterised by the use of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers
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Abstract
The invention relates to the technical field of PVC (polyvinyl chloride) base material, and discloses a high-glossiness low-transmittance PVC base material which comprises the following components: 50-300 parts of PVC resin with the polymerization degree of 700-800, 1-4 parts of zinc-based tin mercaptide stabilizer, 0-3 parts of epoxidized soybean oil, 1-3 parts of copolymer of methyl methacrylate and butyl acrylate, 3-6 parts of methyl methacrylate polymer, 4-9 parts of high-strength MBS, 0.1-2.5 parts of ultraviolet absorbent, 0.6-1.5 parts of lubricant and 0.1-0.5 part of pigment; also discloses a preparation method of the high-gloss low-transmittance PVC base material, which comprises the following steps: s1: hot mixing, S2: cold mixing; s3: and (4) extruding. The PVC base material has the advantages of uniform overall thickness distribution, high surface glossiness, low transmittance, durable product and long shelf life.
Description
Technical Field
The invention relates to the technical field of production of PVC base materials, in particular to a high-glossiness low-transmittance PVC base material and a preparation method thereof.
Background
At present, the medicine packaging materials commonly used in the market comprise 4 types of glass, rubber, plastic, metal materials and the like, wherein the polyvinyl chloride medicine packaging material has the advantages of light weight, strong plasticity, elegant appearance, easy transportation and the like, and is widely applied to the packaging of solid preparations such as tablets, capsules, pills, granules and the like. However, the medicine is easily decomposed and deteriorated due to the influence of ambient environments such as illumination and the like in the circulation process, and after the medicine is processed and formed, the medicine can be kept in efficacy only by selecting proper packages, so that the stability of the medicine is improved, the deterioration of the medicine is delayed, and the medication safety of the masses is guaranteed.
The medical packaging material is of a common three-layer composite structure, wherein a surface layer is an aluminum foil, an intermediate layer is PVDC, a base layer is PVC, the base layer is a high-gloss transparent material and has a good three-dimensional effect, but about 90% of long-wave UV-A ultraviolet rays (320nm-400nm) exist in nature, the influence on the quality of a medicine can be caused, the influence of the UV-A ultraviolet rays is reduced in order to ensure the quality of the medicine, the wavelength of the UV-A ultraviolet rays is especially 380nm, the problem of low-gloss high-transmittance of the base layer is solved, and the high-gloss low-transmittance PVC base layer material is needed.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a high-glossiness low-transmittance PVC base layer material and a preparation method thereof, mainly aiming at ensuring the quality of medicines, reducing the influence of UV-A ultraviolet rays, particularly the wavelength of 380nm and solving the problem of low glossiness and high transmittance of the base layer.
(II) technical scheme
In order to achieve the purpose, the invention provides the following technical scheme:
a high gloss low transmission PVC substrate material, the composition includes: 50-300 parts of PVC resin with the polymerization degree of 700-800, 1-4 parts of zinc-based tin mercaptide stabilizer, 0-3 parts of epoxidized soybean oil, 1-3 parts of copolymer of methyl methacrylate and butyl acrylate, 3-6 parts of methyl methacrylate polymer, 4-9 parts of high-strength MBS, 0.1-2.5 parts of ultraviolet absorbent, 0.6-1.5 parts of lubricant and 0.1-0.5 part of pigment.
Further, the ultraviolet absorbent is benzotriazole, and the lubricant is polyol complex acid ester.
A preparation method of a PVC base material with high glossiness and low transmittance comprises the following steps:
s1: hot mixing, preparing various raw materials according to a product formula, and then putting the raw materials into a hot mixing machine for mixing, wherein the raw materials are put in the following sequence: PVC resin, zinc-based tin mercaptide stabilizer, epoxidized soybean oil, colorant, copolymer of methyl methacrylate and butyl acrylate, high-strength MBS and lubricant, wherein the temperature is gradually increased during mixing;
s2: cold mixing, when the temperature of the materials rises to 90-105 ℃, automatically discharging the materials into a cold mixer, stirring and cooling the materials, further mixing the materials uniformly, when the temperature of the materials is cooled to 60-80 ℃, discharging the materials into a storage barrel;
s3: extruding, namely feeding the material which is subjected to cold stirring and uniform mixing into a star-shaped screw extruder, heating, shearing and plasticizing the material, and then extruding;
s4: further plasticizing, wherein the extruded materials immediately enter an open mill after being extruded by an extruder, and are further plasticized;
s5: calendering, namely putting the plasticized mixture into a calender, pressing the mixture into a proper thickness, and tabletting for forming;
s6: and (4) cooling and shaping, namely leading out the rolled product through a stretcher, cooling and shaping, and then rolling to obtain a finished product material.
As a still further embodiment of the present invention, the copolymer of methyl methacrylate and butyl acrylate, the high strength MBS and the lubricant in S1 are put in a hot mixer operating at a high speed.
Further, when the star-shaped screw extruder in the S3 works, the temperature of the main screw is controlled to be 110-145 ℃.
On the basis of the scheme, the temperature of a rolling mill is controlled to be 120-140 ℃ and the rotating speed is controlled to be 25-45RPM when the mill works in S4.
In a further embodiment of the present invention, the calendering rolls are detected in advance when calendering is performed in S5, so as to prevent the calendering rolls from shaking.
(III) advantageous effects
Compared with the prior art, the invention provides the PVC base material with high glossiness and low transmittance and the preparation method thereof, and the PVC base material has the following beneficial effects:
1. the copolymer of methyl methacrylate and butyl acrylate, high-strength MBS and lubricant are put into a thermal mixer under high-speed operation, so that the components can be mixed more fully without damaging the structure of the raw materials.
2. When the star-shaped screw extruder in S3 works, the temperature of the main screw is controlled to be 110-145 ℃, so that the material can be better sheared and plasticized, the working efficiency is improved, and the material is further plasticized in S4, so that the surface gloss is improved, the transmittance is reduced, and the star-shaped screw extruder is more durable.
3. Detect in advance to the calendering roller through the pressure delay, prevent that the calendering roller from rocking, guarantee the degree of consistency that the material calendered.
4. The material prepared by the process has the advantages of uniform overall thickness distribution, high surface glossiness, low transmissivity, durable product and long quality guarantee period, and has economic benefit.
Drawings
FIG. 1 is a schematic flow structure diagram of a preparation method of a high-gloss low-transmittance PVC base material according to the present invention.
FIG. 2 is a table showing the product performance test of the preparation method of the high-gloss low-transmittance PVC base material provided by the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
A high gloss low transmission PVC substrate material, the composition includes: 100 parts of PVC resin with the polymerization degree of 700-800, 2 parts of zinc-based tin mercaptide stabilizer, 0.5 part of epoxidized soybean oil, 1.1 part of copolymer of methyl methacrylate and butyl acrylate, 3 parts of methyl methacrylate polymer, 6 parts of high-strength MBS, 0.5 part of ultraviolet absorbent, 0.6 part of lubricant and 0.1 part of pigment.
Referring to fig. 1-2, a method for preparing a high-gloss low-transmittance PVC base material includes the steps of:
s1: hot mixing, preparing various raw materials according to a product formula, and then putting the raw materials into a hot mixing machine for mixing, wherein the raw materials are put in the following sequence: PVC resin, zinc-based tin mercaptide stabilizer, epoxidized soybean oil, colorant, copolymer of methyl methacrylate and butyl acrylate, high-strength MBS and lubricant, wherein the temperature is gradually increased during mixing;
s2: cold mixing, when the temperature of the materials rises to 90-105 ℃, automatically discharging the materials into a cold mixer, stirring and cooling the materials, further mixing the materials uniformly, when the temperature of the materials is cooled to 60-80 ℃, discharging the materials into a storage barrel;
s3: extruding, namely feeding the material which is subjected to cold stirring and uniform mixing into a star-shaped screw extruder, heating, shearing and plasticizing the material, and then extruding;
s4: further plasticizing, wherein the extruded materials immediately enter an open mill after being extruded by an extruder, and are further plasticized;
s5: calendering, namely putting the plasticized mixture into a calender, pressing the mixture into a proper thickness, and tabletting for forming;
s6: and (4) cooling and shaping, namely leading out the rolled product through a stretcher, cooling and shaping, and then rolling to obtain a finished product material.
According to the invention, the copolymer of methyl methacrylate and butyl acrylate, high-strength MBS and a lubricant in S1 are put in a hot mixer under high-speed operation, so that the materials can be more fully mixed without damaging the structure of the raw materials, the temperature of a main screw is controlled to be 110-145 ℃ when a star-shaped screw extruder in S3 works, so that the materials can be better sheared and plasticized, the working efficiency is improved, the temperature of a roller machine is controlled to be 120-140 ℃ and the rotating speed is controlled to be 25-45RPM when the mixer works in S4, the materials are further plasticized, the surface gloss is improved, the transmittance is reduced, the durability is improved, the calendering rollers are detected in advance when the calendering is carried out in S5, the shaking of the calendering rollers is prevented, and the uniformity of the calendering of the materials is ensured.
Example 2
A high gloss low transmission PVC substrate material, the composition includes: 100 parts of PVC resin with the polymerization degree of 700-800, 2 parts of zinc-based tin mercaptide stabilizer, 0.5 part of epoxidized soybean oil, 1.1 part of copolymer of methyl methacrylate and butyl acrylate, 3 parts of methyl methacrylate polymer, 6 parts of high-strength MBS, 0.5 part of ultraviolet absorbent, 0.6 part of lubricant and 0.1 part of pigment.
Referring to fig. 1-2, a method for preparing a high-gloss low-transmittance PVC base material includes the steps of:
s1: hot mixing, preparing various raw materials according to a product formula, and then putting the raw materials into a hot mixing machine for mixing, wherein the raw materials are put in the following sequence: PVC resin, zinc-based tin mercaptide stabilizer, epoxidized soybean oil, colorant, copolymer of methyl methacrylate and butyl acrylate, high-strength MBS and lubricant, wherein the temperature is gradually increased during mixing;
s2: cold mixing, when the temperature of the materials rises to 90-105 ℃, automatically discharging the materials into a cold mixer, stirring and cooling the materials, further mixing the materials uniformly, when the temperature of the materials is cooled to 60-80 ℃, discharging the materials into a storage barrel;
s3: extruding, namely feeding the material which is subjected to cold stirring and uniform mixing into a star-shaped screw extruder, heating, shearing and plasticizing the material, and then extruding;
s4: further plasticizing, wherein the extruded materials immediately enter an open mill after being extruded by an extruder, and are further plasticized;
s5: calendering, namely putting the plasticized mixture into a calender, pressing the mixture into a proper thickness, and tabletting for forming;
s6: and (4) cooling and shaping, namely leading out the rolled product through a stretcher, cooling and shaping, and then rolling to obtain a finished product material.
According to the invention, the copolymer of methyl methacrylate and butyl acrylate, high-strength MBS and a lubricant in S1 are put in a hot mixer under high-speed operation, so that the materials can be more fully mixed without damaging the structure of the raw materials, the temperature of a main screw is controlled to be 110-145 ℃ when a star-shaped screw extruder in S3 works, so that the materials can be better sheared and plasticized, the working efficiency is improved, the temperature of a roller machine is controlled to be 120-140 ℃ and the rotating speed is controlled to be 25-45RPM when the mixer works in S4, the materials are further plasticized, the surface gloss is improved, the transmittance is reduced, the durability is improved, the calendering rollers are detected in advance when the calendering is carried out in S5, the shaking of the calendering rollers is prevented, and the uniformity of the calendering of the materials is ensured.
Example 3
A high gloss low transmission PVC substrate material, the composition includes: 100 parts of PVC resin with the polymerization degree of 700-800, 3 parts of zinc-based tin mercaptide stabilizer, 1.5 parts of epoxidized soybean oil, 1.5 parts of copolymer of methyl methacrylate and butyl acrylate, 4 parts of methyl methacrylate polymer, 6.5 parts of high-strength MBS, 1.5 parts of ultraviolet absorbent, 0.7 part of lubricant and 0.5 part of pigment.
Referring to fig. 1-2, a method for preparing a high-gloss low-transmittance PVC base material includes the steps of:
s1: hot mixing, preparing various raw materials according to a product formula, and then putting the raw materials into a hot mixing machine for mixing, wherein the raw materials are put in the following sequence: PVC resin, zinc-based tin mercaptide stabilizer, epoxidized soybean oil, colorant, copolymer of methyl methacrylate and butyl acrylate, high-strength MBS and lubricant, wherein the temperature is gradually increased during mixing;
s2: cold mixing, when the temperature of the materials rises to 90-105 ℃, automatically discharging the materials into a cold mixer, stirring and cooling the materials, further mixing the materials uniformly, when the temperature of the materials is cooled to 60-80 ℃, discharging the materials into a storage barrel;
s3: extruding, namely feeding the material which is subjected to cold stirring and uniform mixing into a star-shaped screw extruder, heating, shearing and plasticizing the material, and then extruding;
s4: further plasticizing, wherein the extruded materials immediately enter an open mill after being extruded by an extruder, and are further plasticized;
s5: calendering, namely putting the plasticized mixture into a calender, pressing the mixture into a proper thickness, and tabletting for forming;
s6: and (4) cooling and shaping, namely leading out the rolled product through a stretcher, cooling and shaping, and then rolling to obtain a finished product material.
According to the invention, the copolymer of methyl methacrylate and butyl acrylate, high-strength MBS and a lubricant in S1 are put in a hot mixer under high-speed operation, so that the materials can be more fully mixed without damaging the structure of the raw materials, the temperature of a main screw is controlled to be 110-145 ℃ when a star-shaped screw extruder in S3 works, so that the materials can be better sheared and plasticized, the working efficiency is improved, the temperature of a roller machine is controlled to be 120-140 ℃ and the rotating speed is controlled to be 25-45RPM when the mixer works in S4, the materials are further plasticized, the surface gloss is improved, the transmittance is reduced, the durability is improved, the calendering rollers are detected in advance when the calendering is carried out in S5, the shaking of the calendering rollers is prevented, and the uniformity of the calendering of the materials is ensured.
Example 4
A high gloss low transmission PVC substrate material, the composition includes: 100 parts of PVC resin with the polymerization degree of 700-800, 4 parts of zinc-based tin mercaptide stabilizer, 3 parts of epoxidized soybean oil, 3 parts of copolymer of methyl methacrylate and butyl acrylate, 6 parts of methyl methacrylate polymer, 9 parts of high-strength MBS, 2.5 parts of ultraviolet absorbent, 1.5 parts of lubricant and 0.5 part of pigment.
Referring to fig. 1-2, a method for preparing a high-gloss low-transmittance PVC base material includes the steps of:
s1: hot mixing, preparing various raw materials according to a product formula, and then putting the raw materials into a hot mixing machine for mixing, wherein the raw materials are put in the following sequence: PVC resin, zinc-based tin mercaptide stabilizer, epoxidized soybean oil, colorant, copolymer of methyl methacrylate and butyl acrylate, high-strength MBS and lubricant, wherein the temperature is gradually increased during mixing;
s2: cold mixing, when the temperature of the materials rises to 90-105 ℃, automatically discharging the materials into a cold mixer, stirring and cooling the materials, further mixing the materials uniformly, when the temperature of the materials is cooled to 60-80 ℃, discharging the materials into a storage barrel;
s3: extruding, namely feeding the material which is subjected to cold stirring and uniform mixing into a star-shaped screw extruder, heating, shearing and plasticizing the material, and then extruding;
s4: further plasticizing, wherein the extruded materials immediately enter an open mill after being extruded by an extruder, and are further plasticized;
s5: calendering, namely putting the plasticized mixture into a calender, pressing the mixture into a proper thickness, and tabletting for forming;
s6: and (4) cooling and shaping, namely leading out the rolled product through a stretcher, cooling and shaping, and then rolling to obtain a finished product material.
According to the invention, the copolymer of methyl methacrylate and butyl acrylate, high-strength MBS and a lubricant in S1 are put in a hot mixer under high-speed operation, so that the materials can be more fully mixed without damaging the structure of the raw materials, the temperature of a main screw is controlled to be 110-145 ℃ when a star-shaped screw extruder in S3 works, so that the materials can be better sheared and plasticized, the working efficiency is improved, the temperature of a roller machine is controlled to be 120-140 ℃ and the rotating speed is controlled to be 25-45RPM when the mixer works in S4, the materials are further plasticized, the surface gloss is improved, the transmittance is reduced, the durability is improved, the calendering rollers are detected in advance when the calendering is carried out in S5, the shaking of the calendering rollers is prevented, and the uniformity of the calendering of the materials is ensured.
In the description herein, it is noted that relational terms such as first and second, and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. A high-gloss low-transmittance PVC base material is characterized by comprising the following components: 50-300 parts of PVC resin with the polymerization degree of 700-800, 1-4 parts of zinc-based tin mercaptide stabilizer, 0-3 parts of epoxidized soybean oil, 1-3 parts of copolymer of methyl methacrylate and butyl acrylate, 3-6 parts of methyl methacrylate polymer, 4-9 parts of high-strength MBS, 0.1-2.5 parts of ultraviolet absorbent, 0.6-1.5 parts of lubricant and 0.1-0.5 part of pigment.
2. The high gloss low transmission PVC base material of claim 1, wherein said uv absorber is benzotriazole and the slip agent is a polyol complex acid ester.
3. The method for preparing a high gloss low transmittance PVC base material as claimed in claim 2, comprising the steps of:
s1: hot mixing, preparing various raw materials according to a product formula, and then putting the raw materials into a hot mixing machine for mixing, wherein the raw materials are put in the following sequence: PVC resin, zinc-based tin mercaptide stabilizer, epoxidized soybean oil, colorant, copolymer of methyl methacrylate and butyl acrylate, high-strength MBS and lubricant, wherein the temperature is gradually increased during mixing;
s2: cold mixing, when the temperature of the materials rises to 90-105 ℃, automatically discharging the materials into a cold mixer, stirring and cooling the materials, further mixing the materials uniformly, when the temperature of the materials is cooled to 60-80 ℃, discharging the materials into a storage barrel;
s3: extruding, namely feeding the material which is subjected to cold stirring and uniform mixing into a star-shaped screw extruder, heating, shearing and plasticizing the material, and then extruding;
s4: further plasticizing, wherein the extruded materials immediately enter an open mill after being extruded by an extruder, and are further plasticized;
s5: calendering, namely putting the plasticized mixture into a calender, pressing the mixture into a proper thickness, and tabletting for forming;
s6: and (4) cooling and shaping, namely leading out the rolled product through a stretcher, cooling and shaping, and then rolling to obtain a finished product material.
4. The method for preparing a high gloss low transmittance PVC substrate according to claim 3, wherein the copolymer of methyl methacrylate and butyl acrylate, the high strength MBS and the lubricant in S1 are put in a hot mixer under high speed operation.
5. The method for preparing a high gloss low transmittance PVC substrate according to claim 3, wherein the star screw extruder of S3 is operated with the main screw temperature controlled at 110-145 ℃.
6. The method as claimed in claim 5, wherein the roll mill is operated at 120-140 ℃ and 25-45RPM to plasticize the PVC substrate in one step in S4.
7. The method as claimed in claim 6, wherein the calendering performed in S5 is performed by inspecting the calendering rolls in advance to prevent the calendering rolls from shaking.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010493936.8A CN111675868A (en) | 2020-06-03 | 2020-06-03 | High-glossiness low-transmittance PVC (polyvinyl chloride) base material and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010493936.8A CN111675868A (en) | 2020-06-03 | 2020-06-03 | High-glossiness low-transmittance PVC (polyvinyl chloride) base material and preparation method thereof |
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| CN111675868A true CN111675868A (en) | 2020-09-18 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114103539A (en) * | 2021-11-11 | 2022-03-01 | 江苏学泰印务有限公司 | Flexible substrate heat transfer film and preparation method thereof |
| CN114605756A (en) * | 2022-04-14 | 2022-06-10 | 江苏永润包装材料有限公司 | Preparation method of packaging composite film with high elongation |
| CN114702768A (en) * | 2022-04-15 | 2022-07-05 | 江苏永润包装材料有限公司 | Anti-reflection PVC composite film for medicine packaging and preparation method thereof |
| CN115124796A (en) * | 2022-08-19 | 2022-09-30 | 无锡宏义高分子材料科技有限公司 | PVC material for safe antioxidant medicine package and preparation method thereof |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114103539A (en) * | 2021-11-11 | 2022-03-01 | 江苏学泰印务有限公司 | Flexible substrate heat transfer film and preparation method thereof |
| CN114605756A (en) * | 2022-04-14 | 2022-06-10 | 江苏永润包装材料有限公司 | Preparation method of packaging composite film with high elongation |
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| CN114702768A (en) * | 2022-04-15 | 2022-07-05 | 江苏永润包装材料有限公司 | Anti-reflection PVC composite film for medicine packaging and preparation method thereof |
| CN114702768B (en) * | 2022-04-15 | 2023-08-04 | 江苏永润包装材料有限公司 | Anti-reflection PVC composite film for medicine packaging and preparation method thereof |
| CN115124796A (en) * | 2022-08-19 | 2022-09-30 | 无锡宏义高分子材料科技有限公司 | PVC material for safe antioxidant medicine package and preparation method thereof |
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Application publication date: 20200918 |