CN113321917A - Polycarbonate calendering process - Google Patents
Polycarbonate calendering process Download PDFInfo
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- CN113321917A CN113321917A CN202110661126.3A CN202110661126A CN113321917A CN 113321917 A CN113321917 A CN 113321917A CN 202110661126 A CN202110661126 A CN 202110661126A CN 113321917 A CN113321917 A CN 113321917A
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- 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
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/16—Halogen-containing compounds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/002—Methods
- B29B7/007—Methods for continuous mixing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/22—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of indefinite length
- B29C43/24—Calendering
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/32—Component parts, details or accessories; Auxiliary operations
- B29C43/44—Compression means for making articles of indefinite length
- B29C43/46—Rollers
-
- 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
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/32—Component parts, details or accessories; Auxiliary operations
- B29C43/44—Compression means for making articles of indefinite length
- B29C43/46—Rollers
- B29C2043/461—Rollers the rollers having specific surface features
- B29C2043/463—Rollers the rollers having specific surface features corrugated, patterned or embossed surface
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2069/00—Use of PC, i.e. polycarbonates or derivatives thereof, as moulding material
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- 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
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/16—Halogen-containing compounds
- C08K2003/162—Calcium, strontium or barium halides, e.g. calcium, strontium or barium chloride
-
- 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
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Abstract
The invention discloses a polycarbonate calendering process, and particularly relates to a calendering process, which comprises 95-99 parts by mass of polycarbonate, fluorite, calcium carbonate, pigment, ammonium persulfate and additives. According to the invention, fluorite, calcium carbonate, pigment, ammonium persulfate and additives are added in the process of manufacturing the polycarbonate, and the additives comprise a release agent, an antioxidant, a flame retardant and a light diffusion agent, and the five steps of the step S1, the step S2, the step S3, the step S4 and the step S5 are carried out, meanwhile, the process parameters of each step are strictly controlled, and according to the precision requirement of a calendered product, the proper number of rollers are selected for film calendering, laminating and profiling, so that the polycarbonate product has the defects of higher light transmittance, higher flame retardant property, high heat-resistant softening point, high wear resistance, high processability, difficult generation of toxic substances after decomposition and the like, and the pollution to the environment is reduced, thereby meeting the requirements of high-end markets for the materials.
Description
Technical Field
The invention relates to a calendering process, in particular to a polycarbonate calendering process.
Background
Polycarbonate (PC) is a group of thermoplastic polymers containing carbonate groups in their chemical structure, polycarbonate used in engineering is a tough material, some grades being optically transparent; they are easy to process, mold and thermoform; unlike most thermoplastics, polycarbonate can undergo large plastic deformations without cracking or breaking, so that it can be processed and shaped at room temperature using sheet metal techniques, for example bending on a bending machine, heating not being necessary even for sharp bends with a small radius;
at present, although the existing polycarbonate used has higher flame retardance, the existing polycarbonate has the defects of low heat-resistant softening point, no wear resistance, poorer processing performance, easy generation of toxic substances after decomposition and the like, so that the environmental pollution is serious, and the requirement of high-end markets for materials cannot be met, and the polycarbonate calendering process is provided for solving the problems.
The above information disclosed in this background section is only for enhancement of understanding of the background of the disclosure and therefore it may contain information that does not constitute prior art that is already known to a person of ordinary skill in the art.
Disclosure of Invention
In order to overcome the above defects in the prior art, embodiments of the present invention provide a polycarbonate calendering process, and the technical problems to be solved by the present invention are: the material has the defects of low heat-resistant softening point, no wear resistance, poor processability, easy generation of toxic substances after decomposition and the like, so that the environmental pollution is serious, and the requirement of high-end markets on the material cannot be met.
In order to achieve the purpose, the invention provides the following technical scheme: a polycarbonate calendering process.
The implementation mode is as follows:
comprises the following raw materials: the coating comprises, by mass, 95-99 parts of polycarbonate, 0.5-2 parts of fluorite, 1-2 parts of calcium carbonate, 0.5-2 parts of pigment, 0.5-1 part of ammonium persulfate and 1-2 parts of additive
In a preferred embodiment, the additive comprises a release agent, an antioxidant, a flame retardant and a light diffusion agent, wherein the release agent is 0.1-1 part by weight, the antioxidant is 0.1-0.5 part by weight, the flame retardant is 0.1-0.5 part by weight, the light diffusion agent is 0.5-1 part by weight, and the special auxiliary agent is 0.1-1 part by weight.
In a preferred embodiment, the sum of the parts by weight of the polycarbonate, fluorite, calcium carbonate, pigment, ammonium persulfate, and additives is 100.
The polycarbonate calendering process comprises the following steps:
step S1: preparing a sizing material; step S2: carrying out heat refining and glue supply on the glue stock; step S3: drying the textile; step S4: rolling, laminating and profiling the rubber sheet; step S5: and (5) hanging glue on the textile.
In a preferred embodiment, the temperature of the fluorite calcination in the step S1 is 1400 ℃.
In a preferred embodiment, the equipment used in step S2 is an open mill and a screw extruder, and the open mill comprises coarse milling and fine milling, wherein the roller spacing of the coarse milling is 2-5mm, the roller temperature is 40-45 ℃, and the thin passing is performed for 7-8 times, the roller spacing of the fine milling is 7-10mm, the roller temperature is 60-70 ℃, and the thin passing is performed for 6-7 times.
In a preferred embodiment, the apparatus used in step S3 includes a vertical dryer and a horizontal dryer, and the heating medium is saturated steam and has a temperature of 50-75 ℃.
In a preferred embodiment, the step S4 employs a two-roll, three-roll and four-roll calender, and at least one of the number of rolls of the two-roll, three-roll and four-roll calender is patterned.
The invention has the technical effects and advantages that:
according to the invention, fluorite, calcium carbonate, pigment, ammonium persulfate and additives are added in the process of manufacturing the polycarbonate, and the additives comprise a release agent, an antioxidant, a flame retardant and a light diffusion agent, and the five steps of the step S1, the step S2, the step S3, the step S4 and the step S5 are carried out, meanwhile, the process parameters of each step are strictly controlled, and according to the precision requirement of a calendered product, the proper number of rollers are selected for film calendering, laminating and profiling, so that the polycarbonate product has the defects of higher light transmittance, higher flame retardant property, high heat-resistant softening point, high wear resistance, high processability, difficult generation of toxic substances after decomposition and the like, and the pollution to the environment is reduced, thereby meeting the requirements of high-end markets for the materials.
Drawings
FIG. 1 is a flow chart of the polycarbonate calendering process of the present invention.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the examples set forth herein; rather, these example embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The drawings are merely schematic illustrations of the present disclosure and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and thus their repetitive description will be omitted.
Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more example embodiments. In the following description, numerous specific details are provided to give a thorough understanding of example embodiments of the disclosure. One skilled in the relevant art will recognize, however, that the subject matter of the present disclosure can be practiced without one or more of the specific details, or with other methods, components, steps, and so forth. In other instances, well-known structures, methods, implementations, or operations are not shown or described in detail to avoid obscuring aspects of the disclosure.
Example 1, refer to FIG. 1
The invention provides a polycarbonate calendering process,
comprises the following raw materials: the coating comprises, by mass, 95 parts of polycarbonate, 1 part of fluorite, 1 part of calcium carbonate, 0.5 part of pigment and 0.5 part of ammonium persulfate.
The light diffusion agent comprises 0.1 part by weight of release agent, 0.9 part by weight of antioxidant, 0.9 part by weight of flame retardant and 0.1 part by weight of light diffusion agent.
The total weight of the polycarbonate, the fluorite, the calcium carbonate, the pigment, the ammonium persulfate and the additive is 100.
The polycarbonate calendering process comprises the following steps:
step S1: adding the polytitanate into an engineering plastic pulverizer for pulverizing, sieving with a 200-mesh sieve for later use, calcining the fluorite in a calcining furnace at 1400 ℃ for 20-30min, cooling to room temperature, taking out and pulverizing in the pulverizer, sieving with the 200-mesh sieve for drying to obtain the fluorite powder, adding the polycarbonate, the calcium carbonate, the ammonium persulfate, the fluorite powder and the pigment into a kneader, adding a release agent, an antioxidant, a flame retardant and a light diffusion agent, kneading at the temperature of 110-125 ℃, wherein the rotation speed of the kneader is 600 plus one minute for 700 revolutions per minute, and then cooling and stirring at the temperature of 85-100 ℃ to obtain a sizing material;
step S2: firstly, roughly smelting the rubber material by using an open mill, wherein the roller distance is 2-5mm, the roller temperature is 40-45 ℃, and the thin passing is carried out for 7-8 times, then finely smelting, wherein the roller distance is 7-10mm, the roller temperature is 60-70 ℃, and the thin passing is carried out for 6-7 times, then cutting the hot-smelted rubber material into continuous rubber strips by using a special open mill, continuously feeding the rubber strips to a calender by using a conveyer belt, wherein the speed of the conveyer belt is slightly greater than that of the open mill;
step S3: conveying the textile fabric into a vertical or horizontal dryer, filling saturated water vapor, regulating the temperature to 50-75 ℃, and ensuring the adhesion between the sizing material and the textile fabric by the design so as to prevent bubbles from being generated inside the adhesive fabric;
step S4: the rubber strip is tabletted by a calender (the quality requirements are that the surface of a calendered film is not wrinkled, the inside of the rubber strip is compact and has no holes, bubbles or sponge, the section thickness is uniform and accurate, the shrinkage deformation of each part is consistent, the gluing (the quality requirements are that the surface of the calendered film is wrinkle-free, the inside of the rubber strip is compact and has no bubbles, the thickness distribution is uniform, the temperature and the plasticity of two layers of films are consistent as far as possible), the forming (the quality requirements are that the surface is smooth and has clear patterns, the inside of the rubber strip is compact and has no bubbles, the thickness dimension is accurate and the section geometry is accurate), at the moment, the tabletting, gluing and forming can use two-roll calender, three-roll calender and four-roll calender, at least one of the two-roll calender, three-roll calender and four-roll calender is carved with patterns, the precision requirement of a specific calendering product is determined, the precision requirement is higher, multi-roll calendering is required;
step S5: use the calender at last with the inside gap of sizing material infiltration textile structure to the cover becomes the adhesive tape on the surface of textile, two rollers of calenders this moment are made the bonding together under the pressure effect between two rollers of fabric and film through calender constant speed gyration, and the three-roller calender is the same with two rollers of calender technology, and the difference lies in that the roll gap department that the textile got into the calender has the right amount of deposit to glue, and is to this quality requirement: a. the rubber material has good permeability and high adhesive force to the textile; b. the surface of the rubberized fabric has no phenomena of rubber shortage, wrinkling and fabric pressing; c. the thickness is distributed evenly; d. no impurities and no scorching phenomenon.
Example 2, refer to FIG. 1
The invention provides a polycarbonate calendering process,
comprises the following raw materials: the pigment is prepared from 96 parts by mass of polycarbonate, 1.1 parts by mass of fluorite, 1.1 parts by mass of calcium carbonate, 0.5 part by mass of pigment and 0.5 part by mass of ammonium persulfate.
The light diffusion agent comprises 0.3 part by weight of release agent, 0.1 part by weight of antioxidant, 0.3 part by weight of flame retardant and 0.1 part by weight of light diffusion agent.
The total weight of the polycarbonate, the fluorite, the calcium carbonate, the pigment, the ammonium persulfate and the additive is 100.
The polycarbonate calendering process comprises the following steps:
step S1: adding the polytitanate into an engineering plastic pulverizer for pulverizing, sieving with a 200-mesh sieve for later use, calcining the fluorite in a calcining furnace at 1400 ℃ for 20-30min, cooling to room temperature, taking out and pulverizing in the pulverizer, sieving with the 200-mesh sieve for drying to obtain the fluorite powder, adding the polycarbonate, the calcium carbonate, the ammonium persulfate, the fluorite powder and the pigment into a kneader, adding a release agent, an antioxidant, a flame retardant and a light diffusion agent, kneading at the temperature of 110-125 ℃, wherein the rotation speed of the kneader is 600 plus one minute for 700 revolutions per minute, and then cooling and stirring at the temperature of 85-100 ℃ to obtain a sizing material;
step S2: firstly, roughly smelting the rubber material by using an open mill, wherein the roller distance is 2-5mm, the roller temperature is 40-45 ℃, and the thin passing is carried out for 7-8 times, then finely smelting, wherein the roller distance is 7-10mm, the roller temperature is 60-70 ℃, and the thin passing is carried out for 6-7 times, then cutting the hot-smelted rubber material into continuous rubber strips by using a special open mill, continuously feeding the rubber strips to a calender by using a conveyer belt, wherein the speed of the conveyer belt is slightly greater than that of the open mill;
step S3: conveying the textile fabric into a vertical or horizontal dryer, filling saturated water vapor, regulating the temperature to 50-75 ℃, and ensuring the adhesion between the sizing material and the textile fabric by the design so as to prevent bubbles from being generated inside the adhesive fabric;
step S4: the rubber strip is tabletted by a calender (the quality requirements are that the surface of a calendered film is not wrinkled, the inside of the rubber strip is compact and has no holes, bubbles or sponge, the section thickness is uniform and accurate, the shrinkage deformation of each part is consistent, the gluing (the quality requirements are that the surface of the calendered film is wrinkle-free, the inside of the rubber strip is compact and has no bubbles, the thickness distribution is uniform, the temperature and the plasticity of two layers of films are consistent as far as possible), the forming (the quality requirements are that the surface is smooth and has clear patterns, the inside of the rubber strip is compact and has no bubbles, the thickness dimension is accurate and the section geometry is accurate), at the moment, the tabletting, gluing and forming can use two-roll calender, three-roll calender and four-roll calender, at least one of the two-roll calender, three-roll calender and four-roll calender is carved with patterns, the precision requirement of a specific calendering product is determined, the precision requirement is higher, multi-roll calendering is required;
step S5: use the calender at last with the inside gap of sizing material infiltration textile structure to the cover becomes the adhesive tape on the surface of textile, two rollers of calenders this moment are made the bonding together under the pressure effect between two rollers of fabric and film through calender constant speed gyration, and the three-roller calender is the same with two rollers of calender technology, and the difference lies in that the roll gap department that the textile got into the calender has the right amount of deposit to glue, and is to this quality requirement: a. the rubber material has good permeability and high adhesive force to the textile; b. the surface of the rubberized fabric has no phenomena of rubber shortage, wrinkling and fabric pressing; c. the thickness is distributed evenly; d. no impurities and no scorching phenomenon.
Example 3, refer to FIG. 1
The invention provides a polycarbonate calendering process,
comprises the following raw materials: the pigment is prepared from 96 parts by mass of polycarbonate, 1.1 parts by mass of fluorite, 1.1 parts by mass of calcium carbonate, 0.5 part by mass of pigment and 0.5 part by mass of ammonium persulfate.
The light diffusion agent comprises 0.2 part by weight of release agent, 0.2 part by weight of antioxidant, 0.2 part by weight of flame retardant and 0.2 part by weight of light diffusion agent.
The total weight of the polycarbonate, the fluorite, the calcium carbonate, the pigment, the ammonium persulfate and the additive is 100.
The polycarbonate calendering process comprises the following steps:
step S1: adding the polytitanate into an engineering plastic pulverizer for pulverizing, sieving with a 200-mesh sieve for later use, calcining the fluorite in a calcining furnace at 1400 ℃ for 20-30min, cooling to room temperature, taking out and pulverizing in the pulverizer, sieving with the 200-mesh sieve for drying to obtain the fluorite powder, adding the polycarbonate, the calcium carbonate, the ammonium persulfate, the fluorite powder and the pigment into a kneader, adding a release agent, an antioxidant, a flame retardant and a light diffusion agent, kneading at the temperature of 110-125 ℃, wherein the rotation speed of the kneader is 600 plus one minute for 700 revolutions per minute, and then cooling and stirring at the temperature of 85-100 ℃ to obtain a sizing material;
step S2: firstly, roughly smelting the rubber material by using an open mill, wherein the roller distance is 2-5mm, the roller temperature is 40-45 ℃, and the thin passing is carried out for 7-8 times, then finely smelting, wherein the roller distance is 7-10mm, the roller temperature is 60-70 ℃, and the thin passing is carried out for 6-7 times, then cutting the hot-smelted rubber material into continuous rubber strips by using a special open mill, continuously feeding the rubber strips to a calender by using a conveyer belt, wherein the speed of the conveyer belt is slightly greater than that of the open mill;
step S3: conveying the textile fabric into a vertical or horizontal dryer, filling saturated water vapor, regulating the temperature to 50-75 ℃, and ensuring the adhesion between the sizing material and the textile fabric by the design so as to prevent bubbles from being generated inside the adhesive fabric;
step S4: the rubber strip is tabletted by a calender (the quality requirements are that the surface of a calendered film is not wrinkled, the inside of the rubber strip is compact and has no holes, bubbles or sponge, the section thickness is uniform and accurate, the shrinkage deformation of each part is consistent, the gluing (the quality requirements are that the surface of the calendered film is wrinkle-free, the inside of the rubber strip is compact and has no bubbles, the thickness distribution is uniform, the temperature and the plasticity of two layers of films are consistent as far as possible), the forming (the quality requirements are that the surface is smooth and has clear patterns, the inside of the rubber strip is compact and has no bubbles, the thickness dimension is accurate and the section geometry is accurate), at the moment, the tabletting, gluing and forming can use two-roll calender, three-roll calender and four-roll calender, at least one of the two-roll calender, three-roll calender and four-roll calender is carved with patterns, the precision requirement of a specific calendering product is determined, the precision requirement is higher, multi-roll calendering is required;
step S5: use the calender at last with the inside gap of sizing material infiltration textile structure to the cover becomes the adhesive tape on the surface of textile, two rollers of calenders this moment are made the bonding together under the pressure effect between two rollers of fabric and film through calender constant speed gyration, and the three-roller calender is the same with two rollers of calender technology, and the difference lies in that the roll gap department that the textile got into the calender has the right amount of deposit to glue, and is to this quality requirement: a. the rubber material has good permeability and high adhesive force to the textile; b. the surface of the rubberized fabric has no phenomena of rubber shortage, wrinkling and fabric pressing; c. the thickness is distributed evenly; d. no impurities and no scorching phenomenon.
The points to be finally explained are: first, in the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "mounted," "connected," and "connected" should be understood broadly, and may be a mechanical connection or an electrical connection, or a communication between two elements, and may be a direct connection, and "upper," "lower," "left," and "right" are only used to indicate a relative positional relationship, and when the absolute position of the object to be described is changed, the relative positional relationship may be changed;
secondly, the method comprises the following steps: in the drawings of the disclosed embodiments of the invention, only the structures related to the disclosed embodiments are referred to, other structures can refer to common designs, and the same embodiment and different embodiments of the invention can be combined with each other without conflict;
and finally: the above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that are within the spirit and principle of the present invention are intended to be included in the scope of the present invention.
Claims (8)
1. A polycarbonate calendering process comprises the following raw materials: polycarbonate, fluorite, calcium carbonate, pigment, ammonium persulfate and additive, its characterized in that: the coating comprises, by mass, 95-99 parts of polycarbonate, 1-2 parts of fluorite, 1-2 parts of calcium carbonate, 0.5-2 parts of pigment, 0.5-1 part of ammonium persulfate and 1-2 parts of additive.
2. A polycarbonate calendering process according to claim 1, wherein: the additive comprises 0.1-1 part by weight of mold release agent, 0.1-0.5 part by weight of antioxidant, 0.1-0.5 part by weight of flame retardant, 0.5-1 part by weight of light diffusant and 0.1-1 part by weight of special auxiliary agent.
3. A polycarbonate calendering process according to claim 1, wherein: the sum of the parts by weight of the polycarbonate, the fluorite, the calcium carbonate, the pigment, the ammonium persulfate and the additive is 100.
4. A polycarbonate calendering process according to claim 1, comprising the steps of:
step S1: preparing a sizing material; step S2: carrying out heat refining and glue supply on the glue stock; step S3: drying the textile; step S4: rolling, laminating and profiling the rubber sheet; step S7: and (5) hanging glue on the textile.
5. The polycarbonate calendering process of claim 4, wherein: the temperature of the fluorite calcination in the step S1 is 1400 ℃.
6. The polycarbonate calendering process of claim 4, wherein: the equipment used in the step S2 comprises an open mill and a screw extruder, and the open mill comprises coarse milling and fine milling, wherein the roller spacing of the coarse milling is 2-5mm, the roller temperature is 40-45 ℃, the thin milling is carried out for 7-8 times, the roller spacing of the fine milling is 7-10mm, the roller temperature is 60-70 ℃, and the thin milling is carried out for 6-7 times.
7. The polycarbonate calendering process of claim 4, wherein: the equipment used in the step S3 comprises a vertical drier and a horizontal drier, and the heating medium is saturated steam and has a temperature of 50-75 ℃.
8. The polycarbonate calendering process of claim 4, wherein: the step S6 includes calendering with two, three, and four rollers, and at least one of the rollers of the two, three, and four rollers is engraved with patterns.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114131819A (en) * | 2021-10-15 | 2022-03-04 | 福建燚塑光电科技有限公司 | PC calendering product process method |
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| CN114131819B (en) * | 2021-10-15 | 2023-07-25 | 福建燚塑光电科技有限公司 | PC calendaring product process method |
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Application publication date: 20210831 |