WO2018176771A1 - 一种bopp消光膜及其制造方法 - Google Patents

一种bopp消光膜及其制造方法 Download PDF

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WO2018176771A1
WO2018176771A1 PCT/CN2017/104040 CN2017104040W WO2018176771A1 WO 2018176771 A1 WO2018176771 A1 WO 2018176771A1 CN 2017104040 W CN2017104040 W CN 2017104040W WO 2018176771 A1 WO2018176771 A1 WO 2018176771A1
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Prior art keywords
raw material
antioxidant
melt
temperature
surface layer
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PCT/CN2017/104040
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English (en)
French (fr)
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方文彬
许艺生
徐登赛
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宿迁市金田塑业有限公司
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Publication of WO2018176771A1 publication Critical patent/WO2018176771A1/zh

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    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
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    • C08L23/286—Chlorinated polyethylene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
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    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
    • B32B27/20—Layered products comprising a layer of synthetic resin characterised by the use of special additives using fillers, pigments, thixotroping agents
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    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B32B27/322—Layered products comprising a layer of synthetic resin comprising polyolefins comprising halogenated polyolefins, e.g. PTFE
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Definitions

  • the invention relates to a matting film and a manufacturing method thereof, in particular to a BOPP matting film and a manufacturing method thereof.
  • Matte film is mainly used in the packaging of soap, food, cigarette, cosmetics and pharmaceutical products. It has low gloss, high haze, excellent heat sealability and printing performance. Therefore, it is widely used, but the existing matte film is mainly used.
  • the matting agent is coated on the finished film. After long-term use, the matting performance is weakened, and the quality of the product is degraded, which affects its appearance.
  • the present invention is directed to the deficiencies in the background art: a BOPP matte film and a method of manufacturing the same are provided.
  • a BOPP matte film comprising a surface layer A, a core layer B and a surface layer C.
  • the first raw material of the surface layer A comprises 40-53% chlorinated polyethylene, 30-38% first polyethylene, 10-15% by mass percentage First polypropylene, 3-5% first antioxidant and residual anti-blocking agent
  • the second raw material of the core layer B comprises 35-50% pure polyester matting agent, 5-13% talcum powder, 20 parts by mass -25% second polyethylene, 10-15% second polypropylene, 2-5% first antistatic agent and remaining second antioxidant
  • the third raw material of the surface layer C comprises 30-50% by mass Styrene, 20-35% epoxy resin, 10-20% heat stabilizer, 5-15% second antistatic agent, 3-5% third antioxidant, 10-15% third polypropylene and residual extinction Masterbatch.
  • the first raw material comprises 40-50% chlorinated polyethylene, 30-35% first polyethylene, 10-13% first polypropylene, and 3 by mass percentage. - 4% of the first antioxidant and the remaining anti-blocking agent, the second raw material comprises 35-45% pure polyester matting agent, 10-13% talc powder, 20-23% second polyethylene, 12- by mass percentage 15% second polypropylene, 2-3% first antistatic agent and remaining second antioxidant, the third raw material comprises 30-50% polystyrene, 20-30% epoxy resin, 10-% by mass 18% heat stabilizer, 10-15% second antistatic agent, 3-5% third antioxidant, 12-15% third polypropylene and residual matting masterbatch.
  • the first raw material is included in mass percentage 40-45% chlorinated polyethylene, 32-35% first polyethylene, 11-13% first polypropylene, 3-4% first antioxidant, and remaining anti-blocking agent
  • the second raw material is included by mass percentage 40-45% pure polyester matting agent, 10-12% talc, 20-22% second polyethylene, 13-15% second polypropylene, 2-3% first antistatic agent and remaining second antioxidant
  • the third raw material comprises 30-40% polystyrene, 20-25% epoxy resin, 15-18% heat stabilizer, 13-15% second antistatic agent, 3-5% third by mass percentage Antioxidant, 12-14% third polypropylene and residual matting masterbatch.
  • the thickness distribution of the surface layer A, the core layer B, and the surface layer C is: surface layer A is 0.3-0.7 micrometers, core layer B is 2-6 micrometers, and surface layer C is 4-10. Micrometer; preferably, the surface layer A is 0.3-0.6 micrometers, the core layer B is 2-5 micrometers, the surface layer C is 4-9 micrometers, more preferably, the surface layer A is 0.4-0.6 micrometers, and the core layer B is 2-4 micrometers.
  • the surface layer C is 4-8 microns.
  • the above-mentioned matting masterbatch comprises 40-50% magnesium oxide, 20-35% aluminum oxide, 10-15% ferric oxide, 5-10 by mass percentage. % calcium oxide and residual silica; preferably, the matting masterbatch comprises, by mass percentage, 40-45% magnesium oxide, 20-30% aluminum oxide, 12-15% ferric oxide, 8-10% oxidation Calcium and residual silica; more preferably, the matting masterbatch comprises, by mass percentage, 43-45% magnesium oxide, 20-25% aluminum oxide, 12-14% ferric oxide, 9-10% calcium oxide And the remaining silica.
  • the first antioxidant, the second antioxidant, and the third antioxidant are respectively selected from the group consisting of p-phenylenediamine, dihydroquinoline, trioctyl ester, and triterpenoid.
  • One or more of an ester and 2,6-tris-butyl-4-methylphenol preferably, the first antioxidant, the second antioxidant, and the third antioxidant are respectively selected from the group consisting of p-benzoic acid
  • the first antistatic agent and the second antistatic agent are both an anionic antistatic agent.
  • a method for manufacturing a BOPP matte film comprising the steps of: performing a first filtration, a first mixing, a second filtering, a second mixing, respectively, on the first raw material, the second raw material, and the third raw material; Melt extrusion, slab, longitudinal stretching, transverse stretching, secondary longitudinal stretching, secondary transverse stretching, traction trimming, acceptance, winding, slitting, and finished product, wherein the melt extrusion temperature is 150 -170 ° C, the temperature of the die is 200-220 ° C, the temperature of the chill roll and the water tank during the slab is 10-15 ° C, the longitudinal stretching temperature is 90-110 ° C, and the longitudinal setting temperature is 110- The longitudinal stretching ratio is 2-4 times at 120 ° C, the transverse stretching temperature is 110-135 ° C, the transverse setting temperature is 115-156 ° C, and the transverse stretching ratio is 2-7 times.
  • the method for manufacturing the above BOPP matte film comprises the following steps:
  • the first raw material, the second raw material and the third raw material are respectively placed in the first filtering device for the first filtration, and the materials after the first filtering are respectively placed in the stirring device for stirring, and the mixture is evenly mixed;
  • Raw material, second The raw material and the third raw material are placed in the second filtering device for the second filtering, and the materials after the second filtering are respectively placed in the stirring device for stirring, and are uniformly mixed again;
  • the first raw material, the second raw material and the third raw material respectively mixed uniformly are heated by an extrusion device and then melt-plasticized to form a first melt, a second melt and a third melt.
  • Body, the first melt, the second melt and the third melt respectively enter respective corresponding dies and meet at the exit of the die, and are extruded in three layers, the temperature of the die is 200-220 ° C;
  • the extruded melt is attached to the surface of the quenching roller, cooled by a water tank and solidified into a sheet, wherein the temperature of the quenching roller and the water tank are both 10-15 ° C;
  • the sheet is sequentially placed in a longitudinal stretching machine for the first longitudinal stretching, and the longitudinally stretched sheet is drawn into a transverse stretching machine for the first transverse stretching, and the sheet is then pulled for the first
  • the second longitudinal stretching and the second transverse stretching in the first longitudinal stretching and the second longitudinal stretching, the longitudinal stretching temperature is 90-110 ° C, and the longitudinal setting temperature is 110-120 ° C,
  • the longitudinal stretching ratio is 2-4 times.
  • the transverse stretching temperature is 110-135 ° C
  • the transverse setting temperature is 115-156 ° C.
  • the ratio is 2-7 times;
  • the edge of the stretched sheet is trimmed and trimmed; the cut sheet is subjected to acceptance, and the qualified sheet is cut into a predetermined specification to obtain a finished BOPP matte film.
  • the above extrusion apparatus includes a main extruder and two auxiliary extruders located on both sides of the main extruder, and the first raw material and the third raw material are fed through two auxiliary extruders. Extrusion is performed and the second raw material is extruded through a main extruder.
  • the heating of the main extruder and the auxiliary extruder is performed before the first raw material and the third raw material enter the auxiliary extruder and the second raw material enters the main extruder.
  • the zone is heated to a melting temperature of 150-170 ° C to melt the first raw material, the second raw material, and the third raw material, respectively.
  • the sheet before the first longitudinal stretching and the second longitudinal stretching of the sheet, the sheet is further placed on the preheating roller for preheating, The temperature of the heat is gradually increased from 40 to 50 ° C to 80 to 90 ° C.
  • the aperture of the first filtering device is larger than the aperture of the second filtering device.
  • the first raw material, the second raw material, and the third raw material have a particle diameter of 180-240 mesh, preferably 180-220 mesh after the first filtration;
  • the particle size of the second raw material and the third raw material after the second filtration is 260-300 mesh, preferably 260-280 mesh.
  • the width of the edge of the sheet after trimming is 120-150 mm.
  • the invention is simple to manufacture, adopts a three-layer structure co-extrusion composite technology, and the surface layer A, the core layer B and the surface layer C are respectively melt-extruded by using different raw materials, and the first raw material of the surface layer A comprises chlorinated polyethylene and the first polyethylene. a first polypropylene, a first antioxidant, and a residual release agent; the second material of the core layer B comprises a pure polyester matting agent, talc, a second polyethylene, a second polypropylene, a first antistatic agent, and The second antioxidant is remaining; the third raw material includes polystyrene, epoxy resin, heat stabilizer, second antistatic agent, third antioxidant, third polypropylene, and residual matting masterbatch.
  • the raw materials of the surface layer A, the core layer B and the surface layer C all contain an antioxidant, and the antioxidant can prevent the product from being oxidized, which is beneficial to enhance the matting performance of the product, and the addition of the polyolefin (for example, chlorinated polyethylene, polyethylene) , polypropylene and polystyrene, etc.) make the product with high haze and low gloss, and the surface of the film is soft and paper-like.
  • the manufacturing method provided by the invention has simple preparation process, and firstly filters and removes impurities, and the manufactured product has beautiful appearance, good matting performance, strong extinction stability, and can reduce the thickness of the product by performing multiple stretching on the product. , the effect is better.
  • the BOPP matte film of the embodiment of the present invention and a method for manufacturing the same will be specifically described below.
  • the invention discloses a BOPP matte film comprising a surface layer A, a core layer B and a surface layer C.
  • the surface layer A comprises 40-53% chlorinated polyethylene, 30-38% polyethylene, 10-15% first poly in terms of mass percentage.
  • core layer B comprises 35-50% pure polyester matting agent, 5-13% talc powder, 20-25% second polyethylene by mass percentage , 10-15% of the second polypropylene, 2-5% of the first antistatic agent and the remaining second antioxidant
  • surface layer C comprises 30-50% polystyrene, 20-35% epoxy resin by mass percentage 10-20% heat stabilizer, 5-15% second antistatic agent, 3-5% third antioxidant, 10-15% third polypropylene and residual matting masterbatch.
  • the raw materials of the surface layer A, the core layer B and the surface layer C all contain an antioxidant, and the antioxidant can prevent the product from being oxidized, which is beneficial to enhance the matting performance of the product, and the addition of the polyolefin (for example, chlorine) Polyethylene, polyethylene, polypropylene, polystyrene, etc. make the product have high haze and low gloss, and the surface of the film is soft and paper-like.
  • the polyolefin for example, chlorine
  • Polyethylene, polyethylene, polypropylene, polystyrene, etc. make the product have high haze and low gloss, and the surface of the film is soft and paper-like.
  • surface layer A is 0.3-0.7 micrometers
  • core layer B is 2-6 micrometers
  • surface layer C is 4-10 micrometers
  • thicknesses of layers A, B, and C are small, and the final layer is obtained.
  • the thickness of the product is significantly smaller than that of the prior art BOPP matte film, and the effect is better.
  • the matting masterbatch comprises 40-50% magnesium oxide, 20-35% aluminum oxide, 10-15% ferric oxide, by mass percentage. 5-10% calcium oxide and residual silica.
  • the first antioxidant, the second antioxidant, and the third antioxidant are all selected from the group consisting of p-phenylenediamine, dihydroquinoline, trioctyl ester, tridecyl ester, and 2,6-tris-butyl-4-methyl
  • One or more of the phenols, the first antistatic agent and the second antistatic agent are anionic antistatic agents. According to the research of the inventors, the use of the above-mentioned matting masterbatch, antioxidant and antistatic agent is beneficial to improve the performance of the product.
  • the invention also provides a method for manufacturing a BOPP matte film, comprising the steps of: performing the first filtration, the first mixing, the second filtering, and the first raw material, the second raw material and the third raw material as follows: Secondary compounding, melt extrusion, casting, first longitudinal stretching, first transverse stretching, second longitudinal stretching, second transverse stretching, traction trimming, acceptance, winding, and dividing And the finished product, wherein the melt extrusion temperature is 150-170 ° C, the temperature of the die is 200-220 ° C, and the temperature of the chill roll and the water tank during the slab is 10-15 ° C, the longitudinal drawing
  • the stretching temperature is 90-110 ° C
  • the longitudinal setting temperature is 110-120 ° C
  • the longitudinal stretching ratio is 2-4 times
  • the transverse stretching temperature is 110-135 ° C
  • the transverse setting temperature is 115-156 ° C
  • the transverse drawing is performed.
  • the stretch ratio is 2-7 times.
  • the first filtration is to first filter the first raw material, the second raw material and the third raw material through a first filtering device (such as a sieve, a filter cloth or a tubular filter, etc.), wherein the first filtering
  • the device is preferably a screen and is screened for 180-240 mesh, more preferably, the mesh of the first filter is 180-220 mesh; the filtered first raw material, the second raw material, and the first The three raw materials are uniformly mixed; the first raw material after the mixing is further filtered by the second filtering device (for example, a sieve, a filter cloth or a tube filter, etc.), wherein the first filtering device is preferably 260-300.
  • the second raw material after mixing is filtered through a 260-300 mesh screen, and the mixed third raw material is filtered through a 260-300 mesh screen.
  • the mesh number at the time of the second filtration is preferably 260 to 280 mesh.
  • the number of filtration and mixing is not limited to two, and the specific number of times may be selected according to actual needs, and may be 3-5 times.
  • melt extrusion at a melting temperature of 150-170 ° C, the first raw material, the second raw material and the third raw material separately mixed are heated by an extrusion device, and then melted and plasticized to form a first melt, The second melt and the third melt, the first melt, the second melt and the third melt respectively enter respective corresponding dies and merge at the exit of the die, and are extruded in three layers, the temperature of the die is 200- 220 ° C.
  • the extrusion apparatus includes a main extruder and two auxiliary extruders located on both sides of the main extruder, and the heating zones of the main extruder and the auxiliary extruder are both heated to 150-170 ° C, so that The first raw material, the second raw material, and the third raw material are separately melted, In the melting process, the first raw material, the second raw material and the third raw material are plasticized and kneaded by the action of the twin-screw extruder, and the water and air in the raw material are utilized by the vacuum pump through the two exhaust ports of the heating zone.
  • the vacuum is discharged; the melted melt of the first raw material, the second raw material, and the third raw material enters the die through the three-layer co-extruded feed block, and merges at the exit of the die.
  • the melt is evenly distributed in the die into three layers, wherein the surface layer A and the surface layer C are the melt of the auxiliary extruder, and the core layer B is the melt of the main extruder, and the die temperature is 200-220 °C.
  • Casting piece The extruded melt is attached to the surface of the chill roll, and is solidified into a sheet by cooling with a water tank, wherein the temperature of the chill roll and the water tank is 10-15 °C.
  • Stretching The sheet is stretched a plurality of times, and the number of times of stretching is 2-4 times, preferably 2 times. Any one of the multiple stretchings includes longitudinal stretching and transverse stretching in sequence. When the number of stretching is 2 times, specifically, the first longitudinal stretching, the first transverse stretching, the second longitudinal stretching, and the second transverse stretching are sequentially performed on the sheet.
  • the first longitudinal stretching before entering the longitudinal stretching machine, the sheet is first heated by a set of preheating rolls, the temperature setting is gradually increased from 40-50 ° C to 80-90 ° C, and then stretched in the longitudinal direction.
  • the machine is stretched into a film once, and the longitudinal stretching temperature is 90-110 ° C.
  • the longitudinally stretched sheet is subjected to proportional heat setting on the surface of a set of setting rolls, and the longitudinal setting temperature is 110-120 ° C, and the longitudinal stretching is performed.
  • the ratio is 2-4 times;
  • the first horizontal stretching the sheet is longitudinally stretched and then enters the horizontal drawing machine.
  • the two sides of the film are clamped by the chain clamp, and the chain clamp pulls the sheet forward, and the wind turbine passes through the wind with uniform air holes.
  • the tube is heated from above and below to the film blowing hot air, the temperature setting is gradually increased from 95 ° C to 160 ° C, and then enters the transverse stretching zone, and the width of the chain clip is gradually widened in the stretching zone, so that the sheet is transversely stretched and pulled laterally.
  • the stretching temperature is 110-135 ° C, and the transverse stretching ratio is 2-7 times; the stretched sheet is subjected to transverse heat setting through the shaping section, and the transverse setting temperature is 115-156 ° C.
  • the second longitudinal stretching the sheet is transversely stretched and then enters the longitudinal stretching machine to repeat the first longitudinal stretching operation;
  • the second transverse stretching the sheet is longitudinally stretched and then enters the horizontal drawing machine, repeating the above-mentioned first transverse stretching operation; then cooling is performed through the cooling section;
  • Traction trimming trimming the edges of the sheet.
  • the sheet discharged from the exit of the second transverse stretch enters the traction station, the traction station is equipped with a thickness gauge, and the edge rest device in the traction station passes the edge cutter to the edge of the sheet clamped by the chain clamp After the rest, the width of the edge of the sheet is 120-150 mm after trimming, and the trimming material is conveyed by the suction pipe to the trimming machine to be smashed into pieces, and the pieces of the sheet are directly conveyed to the main extruder through the pipeline. Mixing system.
  • Winding The unqualified sheet is wound by the winder, the winder is a double-station rotary winder, and the double-slewing winder is equipped with an automatic roll changing and cutting system.
  • Slitting After winding, the sheet is cut into preset specifications. Specifically, the film is pulled from the unwinding frame to the cutter, During the process, the tension of the sheet is ensured and flattened. At the slitting roller, the film is cut into preset specifications, and the winding station is distributed on both sides of the slitting roller, and is wound up at intervals on both sides of the station.
  • the manufacturing method provided by the invention has simple preparation process, and the raw material is firstly filtered to remove impurities, the manufactured product is beautiful, the matting performance is good, the extinction stability is strong, and the thickness of the product can be reduced by repeatedly stretching the product. better result.
  • the invention discloses a BOPP matting film, a surface layer A, a core layer B and a surface layer C.
  • the surface layer A comprises 40% chlorinated polyethylene, 35% first polyethylene, 12% first polypropylene, 3% first by mass percentage.
  • Antioxidant and residual anti-blocking agent core layer B includes 40% pure polyester matting agent, 10% talc powder, 20% second polyethylene, 15% second polypropylene, 3% first antistatic And residual antioxidant
  • surface layer C includes 35% polystyrene, 25% epoxy resin, 15% heat stabilizer, 15% second antistatic agent, 4% third antioxidant, 12% by mass.
  • the thickness distribution of the third polypropylene and the remaining matting masterbatch, the surface layer A, the core layer B and the surface layer C is included by mass percentage.
  • the surface layer A is 0.6 micrometers
  • the core layer B is 4 micrometers
  • the surface layer C is 6 micrometers
  • the matting masterbatch is included by mass percentage.
  • magnesium oxide, 21% aluminum oxide, 12% ferric oxide, 10% calcium oxide, residual silica, the first antioxidant, the second antioxidant, and the third antioxidant are respectively selected from the pair Phenylenediamine, dihydroquinoline, trioctyl ester, tridecyl ester or 2,6-tributyl-4-methylphenol, first antistatic agent and Antistatic agents are anionic antistatic agents.
  • a method for manufacturing a BOPP matte film comprising the following steps,
  • the first raw material, the second raw material and the third raw material are separately filtered through a 180-mesh sieve, and then uniformly mixed, and then filtered through a 260-mesh sieve for a second filtration, and then uniformly mixed;
  • the extruded melt is attached to the surface of the quenching roller, cooled by a water tank and solidified into a sheet, wherein the temperature of the quenching roller and the water tank are both 10 ° C;
  • the sheet is sequentially subjected to the first longitudinal stretching, the first transverse stretching, the second longitudinal stretching, and the second transverse stretching, in the first longitudinal stretching and the second longitudinal stretching, longitudinally
  • the stretching temperature is 90 ° C
  • the longitudinal setting temperature is 110 ° C
  • the longitudinal stretching ratio is 2 times.
  • the transverse stretching temperature is 110 ° C.
  • the transverse setting temperature is 115 ° C, and the transverse stretching ratio is 2 times;
  • the edge of the stretched sheet is trimmed and trimmed, and the width after the trimming is 120 mm;
  • the sheet after trimming is subjected to acceptance, and the qualified sheet is cut into a predetermined specification after being wound up to obtain a finished BOPP matte film.
  • This embodiment provides a BOPP matte film including a surface layer A, a core layer B, and a surface layer C.
  • the first raw material of the surface layer A comprises 40% chlorinated polyethylene, 38% first polyethylene, 10% first polypropylene, 3% first antioxidant and residual anti-blocking agent by mass percentage;
  • the second raw material comprises 50% pure polyester matting agent, 5% talc powder, 20% second polyethylene, 10% second polypropylene, 2% first antistatic agent and remaining second antioxidant in mass percentage;
  • the third raw material of C includes 40% polystyrene, 20% epoxy resin, 10% heat stabilizer, 5% second antistatic agent, 3% third antioxidant, 10% third polypropylene by mass percentage.
  • a residual matting masterbatch wherein the matting masterbatch comprises, by mass percentage, 40% magnesium oxide, 20% aluminum oxide, 10% ferric oxide, 5% calcium oxide, and residual silica.
  • the surface layer A is 0.3 micrometers
  • the core layer B is 2 micrometers
  • the surface layer C is 4 micrometers
  • the first antioxidant, the second antioxidant, and the third antioxidant are all selected from the group consisting of p-phenylenediamine and dihydrogen.
  • the first antistatic agent and the second antistatic agent are both anionic antistatic agents.
  • the method for manufacturing the BOPP matte film comprises the following steps:
  • the first raw material, the second raw material and the third raw material are separately filtered through a 240-mesh sieve, mixed, and then filtered through a 300-mesh sieve for a second filtration, and then mixed;
  • the extruded melt is attached to the surface of the quenching roller, cooled by a water tank and solidified into a sheet, wherein the temperature of the quenching roller and the water tank are both 15 ° C;
  • the sheet is sequentially subjected to the first longitudinal stretching, the first transverse stretching, the second longitudinal stretching, and the second transverse stretching, in the first longitudinal stretching and the second longitudinal stretching, longitudinally
  • the stretching temperature is 110 ° C
  • the longitudinal setting temperature is 120 ° C
  • the longitudinal stretching ratio is 4 times.
  • the transverse stretching temperature is 135 ° C.
  • the transverse setting temperature is 156 ° C, and the transverse stretching ratio is 7 times;
  • the edge of the stretched sheet is trimmed and trimmed, and the width after the trimming is 150 mm;
  • the qualified sheet is cut into a preset size after being wound up, and the finished product is obtained. BOPP matt film.
  • This embodiment provides a BOPP matte film including a surface layer A, a core layer B, and a surface layer C.
  • the first raw material of the surface layer A comprises 53% chlorinated polyethylene, 30% first polyethylene, 10% first polypropylene, 5% first antioxidant and residual anti-blocking agent by mass percentage;
  • the second raw material comprises 35% pure polyester matting agent, 13% talc powder, 25% second polyethylene, 10% second polypropylene, 2% first antistatic agent and remaining second antioxidant in mass percentage;
  • the third raw material of C includes 50% polystyrene, 20% epoxy resin, 10% heat stabilizer, 5% second antistatic agent, 3% third antioxidant, 10% third polypropylene by mass percentage. And the remaining matting masterbatch.
  • the surface layer A is 0.7 micron
  • the core layer B is 6 micrometers
  • the surface layer C is 10 micrometers
  • the matting masterbatch comprises 50% magnesium oxide, 20% aluminum oxide, 10% ferric oxide, 5% by mass percentage.
  • the first antioxidant, the second antioxidant, and the third antioxidant are each selected from the group consisting of p-phenylenediamine.
  • the first antistatic agent and the second antistatic agent are both anionic antistatic agents.
  • the method for manufacturing the BOPP matte film comprises the following steps:
  • the first raw material, the second raw material and the third raw material are respectively filtered through a 200-mesh sieve for a first time, then mixed, and then subjected to a second filtration through a 280 mesh sieve, and then mixed;
  • the extruded melt is attached to the surface of the chill roll, cooled by a water tank and solidified into a sheet, wherein the temperature of the chill roll and the water tank is 12 ° C;
  • the sheet is placed on a preheating roll for preheating, and the preheating temperature is gradually increased from 50 ° C to 80 ° C, and then the sheet is sequentially subjected to the first longitudinal stretching, the first transverse stretching, and then the sheet.
  • the preheating temperature is gradually increased from 50 ° C to 80 ° C
  • the second longitudinal stretching and the second transverse stretching are performed, in the first longitudinal stretching and the second longitudinal stretching
  • the longitudinal stretching temperature is 100 ° C
  • the longitudinal setting temperature is 115 ° C
  • the longitudinal stretching ratio is 3 times.
  • the transverse stretching temperature is Both are 125 ° C
  • the transverse setting temperature is 140 ° C
  • the transverse stretching ratio is 5 times;
  • the edge of the stretched sheet is trimmed and trimmed, and the width after trimming is 140 mm;
  • the sheet after trimming is subjected to acceptance, and the qualified sheet is cut into a predetermined specification after being wound up to obtain a finished BOPP matte film.
  • This embodiment provides a BOPP matte film including a surface layer A, a core layer B, and a surface layer C.
  • the first raw material of the surface layer A comprises 40% chlorinated polyethylene, 35% first polyethylene, 13% first polypropylene, 4% first antioxidant, and residual anti-blocking agent by mass percentage;
  • the second raw material comprises, by mass percentage, 45% pure polyester matting agent, 10% talc powder, 23% second polyethylene, 12% second polypropylene, 3% first antistatic agent and remaining second antioxidant;
  • the third raw material of C includes 30% polystyrene, 30% epoxy resin, 10% heat stabilizer, 10% second antistatic agent, 5% third antioxidant, 12% third polypropylene by mass percentage. And the remaining matting masterbatch.
  • the surface layer A is 0.6 micrometers
  • the core layer B is 5 micrometers
  • the surface layer C is 9 micrometers
  • the matting masterbatch comprises, by mass percent, 50% magnesium oxide, 20% aluminum oxide, 10% ferric oxide, 5% calcium oxide, and residual silica.
  • the first antioxidant, the second antioxidant, and the third antioxidant are each selected from the group consisting of p-phenylenediamine.
  • the first antistatic agent and the second antistatic agent are both anionic antistatic agents.
  • the method for manufacturing the BOPP matte film comprises the following steps:
  • the first raw material, the second raw material and the third raw material are respectively filtered through a 220-mesh sieve for a first time, then mixed, and then subjected to a second filtration through a 280 mesh sieve, and then mixed;
  • the extruded melt is attached to the surface of the quenching roller, cooled by a water tank and solidified into a sheet, wherein the temperature of the quenching roller and the water tank are both 13 ° C;
  • the sheet is sequentially subjected to the first longitudinal stretching, the first transverse stretching, the second longitudinal stretching, and the second transverse stretching, in the first longitudinal stretching and the second longitudinal stretching, longitudinally
  • the stretching temperature is 90-110 ° C
  • the longitudinal setting temperature is 110-120 ° C
  • the longitudinal stretching ratio is 2-4 times.
  • the transverse stretching is performed.
  • the temperature is 110-135 ° C
  • the transverse setting temperature is 115-156 ° C
  • the transverse stretching ratio is 2-7 times;
  • the edge of the stretched sheet is trimmed and trimmed, and the width after the trimming is 130 mm;
  • the sheet after trimming is subjected to acceptance, and the qualified sheet is cut into a predetermined specification after being wound up to obtain a finished BOPP matte film.
  • This embodiment is substantially the same as the second embodiment, and the difference is that in the present embodiment, the mass percentages of the first raw material, the second raw material, and the third raw material are different.
  • the mass percentages of the first raw material, the second raw material, and the third raw material are different.
  • the first raw material of the surface layer A comprises, by mass percentage, 40% chlorinated polyethylene, 32% first polyethylene, 11% first polypropylene, 3% first antioxidant, and residual anti-blocking agent;
  • the second raw material of the core layer B comprises, by mass percentage, 10% pure polyester matting agent, 12% talc powder, 20% second polyethylene, 13% second polypropylene, 2% first antistatic agent and the remaining second Antioxidant
  • the third raw material of the surface layer C comprises 30% polystyrene, 20% epoxy resin, 15% heat stabilizer, 15% second antistatic agent, 3% third antioxidant, 14% third polymerization by mass percentage. Propylene and residual matting masterbatch.
  • This embodiment is substantially the same as Embodiment 2, and the difference is that in the present embodiment, the surface layer A is 0.4 ⁇ m, the core layer B is 2 ⁇ m, and the surface layer C is 4 ⁇ m.
  • This embodiment is substantially the same as Embodiment 2, and the difference is that in the present embodiment, the surface layer A is 0.5 ⁇ m, the core layer B is 3 ⁇ m, and the surface layer C is 8 ⁇ m.
  • the matting masterbatch comprises 45% by mass of magnesium oxide, 20% of aluminum oxide, 15% of ferric oxide, and 10% oxidation. Calcium and residual silica.
  • the matting masterbatch comprises 40% magnesium oxide, 30% aluminum oxide, 12% ferric oxide, and 8% oxidation by mass percentage. Calcium and residual silica.
  • Embodiment 2 is substantially the same as Embodiment 2, and the difference is that, in this embodiment, the matting masterbatch includes 43% magnesium oxide, 25% aluminum oxide, 14% ferric oxide, and 9% oxidation by mass percentage. Calcium and residual silica.
  • This embodiment is substantially the same as Example 2, and the difference is that in the present embodiment, the first antioxidant, the second antioxidant, and the third antioxidant are each selected from p-phenylenediamine.
  • This embodiment is substantially the same as Embodiment 2, and the difference is that: in this embodiment, the first antioxidant, the second Both the antioxidant and the third antioxidant are selected from the group consisting of p-phenylenediamine, tridecyl ester, and 2,6-tributyl-4-methylphenol.
  • This embodiment is substantially the same as the second embodiment, and the difference is that in the embodiment, the first antioxidant, the second antioxidant, and the third antioxidant are all selected from the group consisting of p-phenylenediamine and dihydroquinoline. Trioctyl ester, tridecyl ester and 2,6-tributyl-4-methylphenol.
  • the BOPP matte film provided in Examples 1-4 was tested for extinction performance with a commercially available BOPP matte film. Please refer to Table 1 for the test results.
  • the gloss test, the oxygen index test, the sun fastness and the open cell ratio are all tested according to the conventional detection method, and will not be elaborated here.
  • the invention has simple preparation, is beneficial to improving the matting performance of the product, and makes the obtained product have the characteristics of high haze and low gloss, and the surface reflected light of the film is soft and similar to the paper surface.
  • the manufacturing method provided by the invention has simple manufacturing process, beautiful appearance of the manufactured product, good matting performance, strong extinction stability, and better use effect.

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Abstract

本发明公开了一种BOPP消光膜及其制造方法，涉及消光膜及其制造方法领域，该BOPP消光膜包括A、B、C三层，其中A、C层为表层，B为芯层，表层A的第一原料包括氯化聚乙烯、第一聚乙烯、第一聚丙烯、第一抗氧剂以及防粘剂，芯层B的第二原料包括纯聚酯消光剂、滑石粉、第二聚乙烯、第二聚丙烯、第一抗静电剂以及第二抗氧剂，表层C的第三原料包括聚苯乙烯、环氧树脂、热稳定剂、第二抗静电剂、第三抗氧剂、第三聚丙烯以及消光母料。此外，该制造方法简单、在制作过程中先对原料进行过滤去除杂质，制造出来的产品美观，消光性能好，消光稳定性能强，通过对产品进行二次拉伸能够降低产品的厚度，使用效果更好。

Description

一种BOPP消光膜及其制造方法
相关申请的交叉引用
本申请要求于2017年03月31日提交中国专利局的申请号为201710207810.8、名称为“一种BOPP消光膜及其制造方法”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本发明涉及一种消光膜及其制造方法，具体涉及一种BOPP消光膜及其制造方法。
背景技术
消光膜主要用于肥皂、食品、香烟、化妆品、医药产品的包装盒上，它具有低光泽度高雾度，优异的热封性和印刷性能，因此，应用广泛，但是现有的消光膜主要是在制作完成的膜上涂覆消光剂，长期使用过后，消光性能变弱，产品质量下降，影响其美观。
发明内容
本发明针对背景技术中的不足：提供一种BOPP消光膜及其制造方法。
本发明的目的是通过如下途径实现的：
一种BOPP消光膜，包括表层A、芯层B以及表层C，表层A的第一原料按质量百分数计包括40-53％氯化聚乙烯、30-38％第一聚乙烯、10-15％第一聚丙烯、3-5％第一抗氧剂以及剩余防粘剂，芯层B的第二原料按质量百分数计包括35-50％纯聚酯消光剂、5-13％滑石粉、20-25％第二聚乙烯、10-15％第二聚丙烯、2-5％第一抗静电剂以及剩余第二抗氧剂，表层C的第三原料按质量百分数计包括30-50％聚苯乙烯、20-35％环氧树脂、10-20％热稳定剂、5-15％第二抗静电剂、3-5％第三抗氧剂、10-15％第三聚丙烯以及剩余消光母料。
进一步地，在本发明的其他优选实施例中，上述第一原料按质量百分数计包括40-50％氯化聚乙烯、30-35％第一聚乙烯、10-13％第一聚丙烯、3-4％第一抗氧剂以及剩余防粘剂，第二原料按质量百分数计包括35-45％纯聚酯消光剂、10-13％滑石粉、20-23％第二聚乙烯、12-15％第二聚丙烯、2-3％第一抗静电剂以及剩余第二抗氧剂，第三原料按质量百分数计包括30-50％聚苯乙烯、20-30％环氧树脂、10-18％热稳定剂、10-15％第二抗静电剂、3-5％第三抗氧剂、12-15％第三聚丙烯以及剩余消光母料。
进一步地，在本发明的其他优选实施例中，上述第一原料按质量百分数计包括 40-45％氯化聚乙烯、32-35％第一聚乙烯、11-13％第一聚丙烯、3-4％第一抗氧剂以及剩余防粘剂，第二原料按质量百分数计包括40-45％纯聚酯消光剂、10-12％滑石粉、20-22％第二聚乙烯、13-15％第二聚丙烯、2-3％第一抗静电剂以及剩余第二抗氧剂，第三原料按质量百分数计包括30-40％聚苯乙烯、20-25％环氧树脂、15-18％热稳定剂、13-15％第二抗静电剂、3-5％第三抗氧剂、12-14％第三聚丙烯以及剩余消光母料。
进一步地，在本发明的其他优选实施例中，上述表层A、芯层B以及表层C的厚度分布：表层A为0.3-0.7微米，芯层B为2-6微米，表层C为4-10微米；优选地，表层A为0.3-0.6微米，芯层B为2-5微米，表层C为4-9微米，更优选地，表层A为0.4-0.6微米，芯层B为2-4微米，表层C为4-8微米。
进一步地，在本发明的其他优选实施例中，上述消光母料按质量百分数计包括40-50％氧化镁、20-35％三氧化二铝、10-15％三氧化二铁、5-10％氧化钙以及剩余二氧化硅；优选地，消光母料按质量百分数计包括40-45％氧化镁、20-30％三氧化二铝、12-15％三氧化二铁、8-10％氧化钙以及剩余二氧化硅；更优选地，消光母料按质量百分数计包括43-45％氧化镁、20-25％三氧化二铝、12-14％三氧化二铁、9-10％氧化钙以及剩余二氧化硅。
进一步地，在本发明的其他优选实施例中，上述第一抗氧剂、第二抗氧剂以及第三抗氧剂分别选自对苯二胺、二氢喹啉、三辛酯、三癸酯和2，6-三级丁基-4-甲基苯酚中的一种或多种，优选地，第一抗氧剂、第二抗氧剂以及第三抗氧剂分别选自对苯二胺、二氢喹啉、三辛酯、三癸酯和2，6-三级丁基-4-甲基苯酚的中一种。
进一步地，在本发明的其他优选实施例中，上述第一抗静电剂和第二抗静电剂均为阴离子抗静电剂。
一种BOPP消光膜的制造方法，包括如下步骤，分别对第一原料、第二原料以及第三原料进行如下第一次过滤、第一次混料、第二次过滤、第二次混料、熔融挤出、铸片、纵向拉伸、横向拉伸、二次纵向拉伸、二次横向拉伸、牵引切边、验收、收卷、分切和成品，其中所述熔融挤出温度为150-170℃，模头的温度200-220℃，所述铸片过程中急冷辊和水槽的温度均为10-15℃，所述纵向拉伸温度为90-110℃，纵向定型温度为110-120℃，纵向拉伸比为2-4倍，所述横向拉伸温度为110-135℃，横向定型温度为115-156℃，横向拉伸比为2-7倍。
进一步地，在本发明的其他优选实施例中，上述BOPP消光膜的制造方法包括如下步骤：
分别将第一原料、第二原料和第三原料置于第一过滤设备中进行第一次过滤，经第一次过滤后的物料分别置于搅拌设备中进行搅拌，混合均匀；再将第一原料、第二 原料和第三原料置于第二过滤设备中进行第二次过滤，经第二次过滤后的物料分别置于搅拌设备中进行搅拌，再次混合均匀；
在熔融温度150-170℃下，将分别混合均匀后的第一原料、第二原料和第三原料分别经挤出设备加热后熔融塑化形成第一熔体、第二熔体以及第三熔体，第一熔体、第二熔体以及第三熔体分别进入各自对应的模头并在模头出口处汇合，分三层挤出，模头的温度200-220℃；
挤出的熔体贴附在急冷辊的表面，经水槽冷却后固化成片材，其中急冷辊和水槽的温度均为10-15℃；
对片材依次置于纵向拉伸机中进行第一次纵向拉伸，经纵向拉伸后的片材被牵引进入横向拉伸机中进行第一次横向拉伸，片材接着被牵引进行第二次纵向拉伸以及第二次横向拉伸，在第一次纵向拉伸以及第二次纵向拉伸中，纵向拉伸温度均为90-110℃，纵向定型温度均为110-120℃，纵向拉伸比均为2-4倍，在第一次横向拉伸以及第二次横向拉伸中，横向拉伸温度均为110-135℃，横向定型温度均为115-156℃，横向拉伸比均为2-7倍；
对拉伸后的片材的边缘进行切边休整；对切边后的片材进行验收，验收合格的片材经收卷后分切成预设规格，获得成品BOPP消光膜。
进一步地，在本发明的其他优选实施例中，上述挤出设备包括主挤出机以及位于主挤出机两侧的两个辅挤出机，第一原料和第三原料经由两个辅挤出机挤出，第二原料经由主挤出机挤出。
进一步地，在本发明的其他优选实施例中，在上述第一原料和第三原料进入辅挤出机以及第二原料进入主挤出机之前，将主挤出机和辅挤出机的加热区加热至熔融温度150-170℃，使第一原料、第二原料以及第三原料分别熔融。
进一步地，在本发明的其他优选实施例中，在对上述片材进行第一次纵向拉伸以及第二次纵向拉伸之前，还包括将片材置于预热辊上进行预热，预热的温度从40-50℃逐渐提高至80-90℃。
进一步地，在本发明的其他优选实施例中，上述第一过滤设备的孔径大于第二过滤设备的孔径。
进一步地，在本发明的其他优选实施例中，上述第一原料、第二原料以及第三原料经第一次过滤后的粒径为180-240目，优选为180-220目；第一原料、第二原料以及第三原料经第二次过滤后的粒径为260-300目，优选为260-280目。
进一步地，在本发明的其他优选实施例中，对上述片材的边缘进行切边休整后的宽度为120-150mm。
本发明的有益效果例如包括：
本发明制作简单，采用三层结构共挤复合技术，表层A、芯层B以及表层C分别采用不同的原料进行熔融挤出，并且表层A的第一原料包括氯化聚乙烯、第一聚乙烯、第一聚丙烯、第一抗氧剂以及剩余防粘剂；芯层B的第二原料包括纯聚酯消光剂、滑石粉、第二聚乙烯、第二聚丙烯、第一抗静电剂以及剩余第二抗氧剂；第三原料包括聚苯乙烯、环氧树脂、热稳定剂、第二抗静电剂、第三抗氧剂、第三聚丙烯以及剩余消光母料。表层A、芯层B以及表层C的原料中均含有抗氧剂，抗氧剂能够防止产品被氧化，有利于提升产品的消光性能，而聚烯烃的加入(例如：氯化聚乙烯、聚乙烯、聚丙烯和聚苯乙烯等)使得制得的产品具有高雾度低光泽、薄膜表面反射光柔和类似纸面的特点。此外，本发明提供的制造方法，其制作过程简单，先对原料进行过滤去除杂质，制造出来的产品美观，消光性能好，消光稳定性能强，通过对产品进行多次拉伸能降低产品的厚度，使用效果更好。
具体实施方式
下面将结合实施例对本发明的实施方案进行详细描述，但是本领域技术人员将会理解，下列实施例仅用于说明本发明，而不应视为限制本发明的范围。实施例中未注明具体条件者，按照常规条件或制造商建议的条件进行。所用试剂或仪器未注明生产厂商者，均为可以通过市售购买获得的常规产品。
下面对本发明实施例的BOPP消光膜及其制造方法进行具体说明。本发明公开一种BOPP消光膜，包括表层A、芯层B以及表层C，表层A按质量百分数计包括40-53％氯化聚乙烯、30-38％聚乙烯、10-15％第一聚丙烯、3-5％第一抗氧剂以及剩余防粘剂，芯层B按质量百分数计包括35-50％纯聚酯消光剂、5-13％滑石粉、20-25％第二聚乙烯、10-15％第二聚丙烯、2-5％第一抗静电剂以及剩余第二抗氧剂，表层C按质量百分数计包括30-50％聚苯乙烯、20-35％环氧树脂、10-20％热稳定剂、5-15％第二抗静电剂、3-5％第三抗氧剂、10-15％第三聚丙烯以及剩余消光母料。经发明人研究发现，表层A、芯层B以及表层C的原料中均含有抗氧剂，抗氧剂能够防止产品被氧化，有利于提升产品的消光性能，而聚烯烃的加入(例如：氯化聚乙烯、聚乙烯、聚丙烯和聚苯乙烯等)使得制得的产品具有高雾度低光泽、薄膜表面反射光柔和类似纸面的特点。
表层A、芯层B以及表层C：表层A为0.3-0.7微米，芯层B为2-6微米，表层C为4-10微米，A、B、C各层的厚度小，制得的终产品的厚度明显小于现有技术中的BOPP消光膜，使用效果更好。
消光母料按质量百分数计包括40-50％氧化镁、20-35％三氧化二铝、10-15％三氧化二铁、 5-10％氧化钙以及剩余二氧化硅。第一抗氧剂、第二抗氧剂以及第三抗氧剂均选自对苯二胺、二氢喹啉、三辛酯、三癸酯和2，6-三级丁基-4-甲基苯酚中的一种或多种，第一抗静电剂和第二抗静电剂为阴离子抗静电剂。经发明人研究发现，选用上述提及的消光母料、抗氧剂以及抗静电剂有利于提升产品的效果系能。
本发明还提供了一种BOPP消光膜的制造方法，包括如下步骤：分别对第一原料、第二原料以及第三原料进行如下第一次过滤、第一次混料、第二次过滤、第二次混料、熔融挤出、铸片、第一次纵向拉伸、第一次横向拉伸、第二次纵向拉伸、第二次横向拉伸、牵引切边、验收、收卷、分切和成品，其中，所述熔融挤出温度为150-170℃，模头的温度200-220℃，所述铸片过程中急冷辊和水槽的温度均为10-15℃，所述纵向拉伸温度为90-110℃，纵向定型温度为110-120℃，纵向拉伸比为2-4倍，所述横向拉伸温度为110-135℃，横向定型温度为115-156℃，横向拉伸比为2-7倍。
接下来将对该BOPP消光膜的制造方法中涉及到的各个工艺步骤进行详细阐述，具体地：
(1)均匀：分别对第一原料、第二原料和第三原料进行混匀，具体地，将第一原料、第二原料和第三原料经第一次过滤后，混匀，接着经第二次过滤后，再混匀。
其中，第一次过滤是将第一原料、第二原料以及第三原料分别经第一过滤设备(例如筛网、滤布或管式过滤机等)进行第一次过滤，其中，第一过滤设备优选为筛网，且为180-240目的筛网过滤，更优选地，第一次过滤时的筛网的目数为180-220目；经过滤后的第一原料、第二原料以及第三原料分别混合均匀；将混合后的第一原料再经第二过滤设备(例如筛网、滤布或管式过滤机等)进行第二次过滤，其中，第一过滤设备优选为260-300目的筛网，同样的，将混合后的第二原料再经260-300目的筛网过滤，将混合后的第三原料再经260-300目的筛网过滤。第二次过滤时的筛网目数优选为260-280目。经两次过滤能够使得第一原料、第二原料以及第三原料粒径更均匀，且有效避免银点的出现；将经第二次过滤后的物料混合均匀。
应理解，过滤和混匀的次数不局限于两次，具体次数可视实际需求进行选择，可以为3-5次。
(2)熔融挤出：在熔融温度150-170℃下，将分别混匀后的第一原料、第二原料和第三原料分别经挤出设备加热后熔融塑化形成第一熔体、第二熔体以及第三熔体，第一熔体、第二熔体以及第三熔体分别进入各自对应的模头并在模头出口处汇合，分三层挤出，模头的温度200-220℃。
具体地，将挤出设备包括主挤出机以及位于主挤出机两侧的两个辅挤出机，将主挤出机和辅挤出机的加热区均加热至150-170℃，使第一原料、第二原料以及第三原料分别熔融， 在熔融过程中，第一原料、第二原料以及第三原料在双螺杆挤出机的作用下塑化、混炼，并通过加热区的两个排气口将原料中的水分、空气利用真空泵抽真空排出；第一原料、第二原料以及第三原料经熔融后的熔体通过三层共挤喂料块进入模头，并在模头的出口处汇合。熔体在模头中均匀分布为三层流出，其中表层A及表层C为辅挤出机的熔体，芯层B为主挤出机的熔体，模头温度为200-220℃。
(3)铸片：挤出的熔体贴附在急冷辊的表面，经水槽冷却后固化成片材，其中急冷辊和水槽的温度均为10-15℃。
(4)拉伸：将片材进行多次拉伸，多次拉伸的次数为2-4次，优选为2次。任意一次多次拉伸均包括依次进行的纵向拉伸和横向拉伸。当拉伸次数为2次时，具体包括对片材依次进行第一次纵向拉伸、第一次横向拉伸、第二次纵向拉伸以及第二次横向拉伸。
具体地，第一次纵向拉伸：在进入纵向拉伸机前，片材先经过一组预热辊加热，温度设定从40-50℃逐渐提高至80-90℃，然后在纵向拉伸机上进行一次拉伸成薄膜，纵向拉伸温度为90-110℃，经过纵向拉伸的片材在一组定型辊表面进行比例向热定型，纵向定型温度均为110-120℃，纵向拉伸比均为2-4倍；
第一次横向拉伸：片材经纵向拉伸后进入横拉机，在横拉机入口处薄膜两边被链夹夹持，链夹牵引片材向前运行，同时风机通过有均匀气孔的风管从上下对薄膜吹热风进行加热，温度设定从95℃逐渐提高到160℃，然后进入横向拉伸区，在拉伸区链夹宽度逐渐变宽，使片材进行横向拉伸，横向拉伸温度均为110-135℃，横向拉伸比均为2-7倍；拉伸后的片材经过定型段进行横向热定型，横向定型温度均为115-156℃，
第二次纵向拉伸：片材经横向拉伸后进入纵向拉伸机，重复上述第一次纵向拉伸的操作；
第二次横向拉伸：片材经纵向拉伸后进入横拉机，重复上述第一次横向拉伸的操作；然后通过冷却段进行冷却；
(5)牵引切边：对片材的边缘进行切边休整。具体地，从第二次横向拉伸的出口处排出的片材进入牵引站，牵引站安装有测厚仪，牵引站中的边缘休整装置通过切边刀对被链夹夹住的片材边缘进行休整，对片材的边缘进行切边休整后的宽度为120-150mm，切边料由吸风管传送至切边打碎机粉碎成碎片，片材碎片经管道直接传送至主挤出机的混料系统。
(6)验收：对切边后的片材进行验收，验收合格的片材被牵引至收卷机。
(7)收卷：验收合格的片材经收卷机收卷，收卷机为双工位回转收卷机，双工位回转收卷机配有自动换卷和切割系统。
(8)分切：收卷后片材被分切成预设规格。具体地，薄膜从放卷架牵引至切刀处，过 程中保证片材的张力并展平，在分切辊处薄膜被分切成预设规格，收卷工位分布在分切辊两侧，在两侧的工位上间隔收卷。
(9)成品：将获得成品BOPP消光膜包装、称重后入库。
本发明提供的制造方法，其制作过程简单，先对原料进行过滤去除杂质，制造出来的产品美观，消光性能好，消光稳定性能强，通过对产品进行多次拉伸能降低产品的厚度，使用效果更好。
下面结合实施例对本发明作进一步的描述：
实施例1
本发明一种BOPP消光膜，表层A、芯层B以及表层C，表层A按质量百分数计包括40％氯化聚乙烯、35％第一聚乙烯、12％第一聚丙烯、3％第一抗氧剂以及剩余防粘剂，芯层B按质量百分数计包括40％纯聚酯消光剂、10％滑石粉、20％第二聚乙烯、15％第二聚丙烯、3％第一抗静电剂以及剩余抗氧剂，表层C按质量百分数即包括35％聚苯乙烯、25％环氧树脂、15％热稳定剂、15％第二抗静电剂、4％第三抗氧剂、12％第三聚丙烯以及剩余消光母料，表层A、芯层B以及表层C的厚度分布：表层A为0.6微米，芯层B为4微米，表层C为6微米，消光母料按质量百分数计包括45％氧化镁、21％三氧化二铝、12％三氧化二铁、10％氧化钙、剩余二氧化硅，第一抗氧剂、第二抗氧剂以及第三抗氧剂分别选自对苯二胺、二氢喹啉、三辛酯、三癸酯或2，6-三级丁基-4-甲基苯酚，第一抗静电剂和第二抗静电剂均为阴离子抗静电剂。
一种BOPP消光膜的制造方法，包括如下步骤，
分别对第一原料、第二原料和第三原料经180目的筛网进行第一次过滤后，混合均匀，接着经260目的筛网进行第二次过滤后，再混合均匀；
将主挤出机和辅挤出机的加热区加热至熔融温度150℃，使得分别混匀后的第一原料、第二原料和第三原料熔融塑化形成第一熔体、第二熔体以及第三熔体，第一熔体、第二熔体以及第三熔体分别进入各自对应的模头并在模头出口处汇合，分三层挤出，模头的温度200℃；
挤出的熔体贴附在急冷辊的表面，经水槽冷却后固化成片材，其中急冷辊和水槽的温度均为10℃；
对片材依次进行第一次纵向拉伸、第一次横向拉伸、第二次纵向拉伸以及第二次横向拉伸，在第一次纵向拉伸以及第二次纵向拉伸中，纵向拉伸温度均为90℃，纵向定型温度均为110℃，纵向拉伸比均为2倍，在第一次横向拉伸以及第二次横向拉伸中，横向拉伸温度均为110℃，横向定型温度均为115℃，横向拉伸比均为2倍；
对拉伸后的片材的边缘进行切边休整，切边休整后的宽度为120mm；
对切边后的片材进行验收，验收合格的片材经收卷后分切成预设规格，获得成品BOPP消光膜。
实施例2
本实施例提供了一种BOPP消光膜，其包括表层A、芯层B以及表层C。表层A的第一原料按质量百分数计包括40％氯化聚乙烯、38％第一聚乙烯、10％第一聚丙烯、3％第一抗氧剂以及剩余防粘剂；芯层B的第二原料按质量百分数计包括50％纯聚酯消光剂、5％滑石粉、20％第二聚乙烯、10％第二聚丙烯、2％第一抗静电剂以及剩余第二抗氧剂；表层C的第三原料按质量百分数计包括40％聚苯乙烯、20％环氧树脂、10％热稳定剂、5％第二抗静电剂、3％第三抗氧剂、10％第三聚丙烯以及剩余消光母料，其中，消光母料按质量百分数计包括40％氧化镁、20％三氧化二铝、10％三氧化二铁、5％氧化钙以及剩余二氧化硅。
其中，表层A为0.3微米，芯层B为2微米，表层C为4微米；第一抗氧剂、第二抗氧剂以及第三抗氧剂均选自选自对苯二胺、二氢喹啉、三辛酯、三癸酯和2，6-三级丁基-4-甲基苯酚的中一种或多种。第一抗静电剂和第二抗静电剂均为阴离子抗静电剂。
该BOPP消光膜的制造方法包括如下步骤：
分别对第一原料、第二原料和第三原料经240目的筛网进行第一次过滤后，混匀，接着经300目的筛网进行第二次过滤后，再混匀；
将主挤出机和辅挤出机的加热区加热至熔融温度170℃，使得分别混匀后的第一原料、第二原料和第三原料熔融塑化形成第一熔体、第二熔体以及第三熔体，第一熔体、第二熔体以及第三熔体分别进入各自对应的模头并在模头出口处汇合，分三层挤出，模头的温度220℃；
挤出的熔体贴附在急冷辊的表面，经水槽冷却后固化成片材，其中急冷辊和水槽的温度均为15℃；
对片材依次进行第一次纵向拉伸、第一次横向拉伸、第二次纵向拉伸以及第二次横向拉伸，在第一次纵向拉伸以及第二次纵向拉伸中，纵向拉伸温度均为110℃，纵向定型温度均为120℃，纵向拉伸比均为4倍，在第一次横向拉伸以及第二次横向拉伸中，横向拉伸温度均为135℃，横向定型温度均为156℃，横向拉伸比均为7倍；
对拉伸后的片材的边缘进行切边休整，切边休整后的宽度为150mm；
对切边后的片材进行验收，验收合格的片材经收卷后分切成预设规格，获得成品 BOPP消光膜。
实施例3
本实施例提供了一种BOPP消光膜，其包括表层A、芯层B以及表层C。表层A的第一原料按质量百分数计包括53％氯化聚乙烯、30％第一聚乙烯、10％第一聚丙烯、5％第一抗氧剂以及剩余防粘剂；芯层B的第二原料按质量百分数计包括35％纯聚酯消光剂、13％滑石粉、25％第二聚乙烯、10％第二聚丙烯、2％第一抗静电剂以及剩余第二抗氧剂；表层C的第三原料按质量百分数计包括50％聚苯乙烯、20％环氧树脂、10％热稳定剂、5％第二抗静电剂、3％第三抗氧剂、10％第三聚丙烯以及剩余消光母料。
其中，表层A为0.7微米，芯层B为6微米，表层C为10微米；消光母料按质量百分数计包括50％氧化镁、20％三氧化二铝、10％三氧化二铁、5％氧化钙以及剩余二氧化硅。第一抗氧剂、第二抗氧剂以及第三抗氧剂均选自选自对苯二胺。第一抗静电剂和第二抗静电剂均为阴离子抗静电剂。
该BOPP消光膜的制造方法包括如下步骤：
分别对第一原料、第二原料和第三原料经200目的筛网进行第一次过滤后，混匀，接着经经280目的筛网进行第二次过滤后，再混匀；
将主挤出机和辅挤出机的加热区加热至熔融温度160℃，使得分别混匀后的第一原料、第二原料和第三原料熔融塑化形成第一熔体、第二熔体以及第三熔体，第一熔体、第二熔体以及第三熔体分别进入各自对应的模头并在模头出口处汇合，分三层挤出，模头的温度210℃；
挤出的熔体贴附在急冷辊的表面，经水槽冷却后固化成片材，其中急冷辊和水槽的温度均为12℃；
将片材置于预热辊上进行预热，预热的温度从50℃逐渐提高至80℃，接着对片材依次进行第一次纵向拉伸、第一次横向拉伸，再将片材置于预热辊上进行预热，预热的温度从50℃逐渐提高至80℃，进行第二次纵向拉伸以及第二次横向拉伸，在第一次纵向拉伸以及第二次纵向拉伸中，纵向拉伸温度均为100℃，纵向定型温度均为115℃，纵向拉伸比均为3倍，在第一次横向拉伸以及第二次横向拉伸中，横向拉伸温度均为125℃，横向定型温度均为140℃，横向拉伸比均为5倍；
对拉伸后的片材的边缘进行切边休整，切边休整后的宽度为140mm；
对切边后的片材进行验收，验收合格的片材经收卷后分切成预设规格，获得成品BOPP消光膜。
实施例4
本实施例提供了一种BOPP消光膜，其包括表层A、芯层B以及表层C。
表层A的第一原料按质量百分数计包括40％氯化聚乙烯、35％第一聚乙烯、13％第一聚丙烯、4％第一抗氧剂以及剩余防粘剂；芯层B的第二原料按质量百分数计包括45％纯聚酯消光剂、10％滑石粉、23％第二聚乙烯、12％第二聚丙烯、3％第一抗静电剂以及剩余第二抗氧剂；表层C的第三原料按质量百分数计包括30％聚苯乙烯、30％环氧树脂、10％热稳定剂、10％第二抗静电剂、5％第三抗氧剂、12％第三聚丙烯以及剩余消光母料。
其中，表层A为0.6微米，芯层B为5微米，表层C为9微米；
消光母料按质量百分数计包括50％氧化镁、20％三氧化二铝、10％三氧化二铁、5％氧化钙以及剩余二氧化硅。
第一抗氧剂、第二抗氧剂以及第三抗氧剂均选自选自对苯二胺。
第一抗静电剂和第二抗静电剂均为阴离子抗静电剂。
该BOPP消光膜的制造方法包括如下步骤：
分别对第一原料、第二原料和第三原料经220目的筛网进行第一次过滤后，混匀，接着经经280目的筛网进行第二次过滤后，再混匀；
将主挤出机和辅挤出机的加热区加热至熔融温度155℃，使得分别混匀后的第一原料、第二原料和第三原料熔融塑化形成第一熔体、第二熔体以及第三熔体，第一熔体、第二熔体以及第三熔体分别进入各自对应的模头并在模头出口处汇合，分三层挤出，模头的温度215℃；
挤出的熔体贴附在急冷辊的表面，经水槽冷却后固化成片材，其中急冷辊和水槽的温度均为13℃；
对片材依次进行第一次纵向拉伸、第一次横向拉伸、第二次纵向拉伸以及第二次横向拉伸，在第一次纵向拉伸以及第二次纵向拉伸中，纵向拉伸温度均为90-110℃，纵向定型温度均为110-120℃，纵向拉伸比均为2-4倍，在第一次横向拉伸以及第二次横向拉伸中，横向拉伸温度均为110-135℃，横向定型温度均为115-156℃，横向拉伸比均为2-7倍；
对拉伸后的片材的边缘进行切边休整，切边休整后的宽度为130mm；
对切边后的片材进行验收，验收合格的片材经收卷后分切成预设规格，获得成品BOPP消光膜。
实施例5
本实施例与实施例2大致相同，其区别点在于：本实施例中，第一原料、第二原料以及第三原料的质量百分比不同。本实施例中，
表层A的第一原料按质量百分数计包括40％氯化聚乙烯、32％第一聚乙烯、11％第一聚丙烯、3％第一抗氧剂以及剩余防粘剂；
芯层B的第二原料按质量百分数计包括10％纯聚酯消光剂、12％滑石粉、20％第二聚乙烯、13％第二聚丙烯、2％第一抗静电剂以及剩余第二抗氧剂；
表层C的第三原料按质量百分数计包括30％聚苯乙烯、20％环氧树脂、15％热稳定剂、15％第二抗静电剂、3％第三抗氧剂、14％第三聚丙烯以及剩余消光母料。
实施例6
本实施例与实施例2大致相同，其区别点在于：本实施例中，表层A为0.4微米，芯层B为2微米，表层C为4微米。
实施例7
本实施例与实施例2大致相同，其区别点在于：本实施例中，表层A为0.5微米，芯层B为3微米，表层C为8微米。
实施例8
本实施例与实施例2大致相同，其区别点在于：本实施例中，消光母料按质量百分数计包括45％氧化镁、20％三氧化二铝、15％三氧化二铁、10％氧化钙以及剩余二氧化硅。
实施例9
本实施例与实施例2大致相同，其区别点在于：本实施例中，消光母料按质量百分数计包括40％氧化镁、30％三氧化二铝、12％三氧化二铁、8％氧化钙以及剩余二氧化硅。
实施例10
本实施例与实施例2大致相同，其区别点在于：本实施例中，消光母料按质量百分数计包括43％氧化镁、25％三氧化二铝、14％三氧化二铁、9％氧化钙以及剩余二氧化硅。
实施例11
本实施例与实施例2大致相同，其区别点在于：本实施例中，第一抗氧剂、第二抗氧剂以及第三抗氧剂均选自对苯二胺。
实施例12
本实施例与实施例2大致相同，其区别点在于：本实施例中，第一抗氧剂、第二 抗氧剂以及第三抗氧剂均选自对苯二胺、三癸酯和2，6-三级丁基-4-甲基苯酚。
实施例13
本实施例与实施例2大致相同，其区别点在于：本实施例中，第一抗氧剂、第二抗氧剂以及第三抗氧剂均选自对苯二胺、二氢喹啉、三辛酯、三癸酯和2，6-三级丁基-4-甲基苯酚。
对比例
将实施例1-4提供的BOPP消光膜与现有市售BOPP消光膜进行消光性能的测试。测试结果请参阅表1。
表1.实施例1-4与对比例的BOPP消光膜的消光性能实验数据
试验例 光泽度(％) 氧指数(％) 日晒色牢度(不低于) 开孔率(％)
实施例1 1.2 31.6 5级 3.2
实施例2 1.4 31.7 5级 3.1
实施例3 1.5 31.4 5级 3.1
实施例4 1.1 31.4 5级 3.4
对比例 4.5 31.8 5级 3.7
其中，光泽度测试、氧指数测试、日晒色牢度以及开孔率均参照常规检测方法进行检测，这里不再一一阐述。
从表1可以看出，本实施例提供的BOPP消光膜的光泽度明显低于市售BOPP消光膜，光泽度越低，消光性能越好，并且本实施例提供的BOPP消光膜的开孔率也低于市售BOPP消光膜，证明其消光性能稳定，抗氧化效果好。
以上仅为本发明的优选实施例而已，并不用于限制本发明，对于本领域的技术人员来说，本发明可以有各种更改和变化。凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。
工业实用性
本发明制作简单，有利于提升产品的消光性能，并且使得制得的产品具有高雾度低光泽、薄膜表面反射光柔和类似纸面的特点。此外，本发明提供的制造方法，其在制作过程简单，制造出来的产品美观，消光性能好，消光稳定性能强，且使用效果更好。

Claims (15)

  1. 一种BOPP消光膜，包括表层A、芯层B以及表层C，其特征在于：
    所述表层A的第一原料按质量百分数计包括40-53％氯化聚乙烯、30-38％第一聚乙烯、10-15％第一聚丙烯、3-5％第一抗氧剂以及剩余防粘剂，所述芯层B的第二原料按质量百分数计包括35-50％纯聚酯消光剂、5-13％滑石粉、20-25％第二聚乙烯、10-15％第二聚丙烯、2-5％第一抗静电剂以及剩余第二抗氧剂，所述表层C的第三原料按质量百分数计包括30-50％聚苯乙烯、20-35％环氧树脂、10-20％热稳定剂、5-15％第二抗静电剂、3-5％第三抗氧剂、10-15％第三聚丙烯以及剩余消光母料。
  2. 根据权利要求1所述的BOPP消光膜，其特征在于：所述第一原料按质量百分数计包括40-50％氯化聚乙烯、30-35％第一聚乙烯、10-13％第一聚丙烯、3-4％第一抗氧剂以及剩余防粘剂，所述第二原料按质量百分数计包括35-45％纯聚酯消光剂、10-13％滑石粉、20-23％第二聚乙烯、12-15％第二聚丙烯、2-3％第一抗静电剂以及剩余第二抗氧剂，所述第三原料按质量百分数计包括30-50％聚苯乙烯、20-30％环氧树脂、10-18％热稳定剂、10-15％第二抗静电剂、3-5％第三抗氧剂、12-15％第三聚丙烯以及剩余消光母料。
  3. 根据权利要求1所述的BOPP消光膜，其特征在于：所述第一原料按质量百分数计包括40-45％氯化聚乙烯、32-35％第一聚乙烯、11-13％第一聚丙烯、3-4％第一抗氧剂以及剩余防粘剂，所述第二原料按质量百分数计包括40-45％纯聚酯消光剂、10-12％滑石粉、20-22％第二聚乙烯、13-15％第二聚丙烯、2-3％第一抗静电剂以及剩余第二抗氧剂，所述第三原料按质量百分数计包括30-40％聚苯乙烯、20-25％环氧树脂、15-18％热稳定剂、13-15％第二抗静电剂、3-5％第三抗氧剂、12-14％第三聚丙烯以及剩余消光母料。
  4. 根据权利要求1所述的BOPP消光膜，其特征在于：所述表层A、所述芯层B以及所述表层C的厚度分布：所述表层A为0.3-0.7微米，所述芯层B为2-6微米，所述表层C为4-10微米；优选地，所述表层A为0.3-0.6微米，所述芯层B为2-5微米，所述表层C为4-9微米，更优选地，所述表层A为0.4-0.6微米，所述芯层B为2-4微米，所述表层C为4-8微米。
  5. 根据权利要求1所述的BOPP消光膜，其特征在于：所述消光母料按质量百分数计包括40-50％氧化镁、20-35％三氧化二铝、10-15％三氧化二铁、5-10％氧化钙以及剩余二氧化硅；优选地，所述消光母料按质量百分数计包括40-45％氧化镁、20-30％三氧化二铝、12-15％三氧化二铁、8-10％氧化钙以及剩余二氧化硅；更优选地，所述消光 母料按质量百分数计包括43-45％氧化镁、20-25％三氧化二铝、12-14％三氧化二铁、9-10％氧化钙以及剩余二氧化硅。
  6. 根据权利要求1所述的BOPP消光膜，其特征在于：所述第一抗氧剂、所述第二抗氧剂以及所述第三抗氧剂均选自由对苯二胺、二氢喹啉、三辛酯、三癸酯和2，6-三级丁基-4-甲基苯酚组成的组中的一种或多种，优选地，所述第一抗氧剂、所述第二抗氧剂以及所述第三抗氧剂均选自由对苯二胺、二氢喹啉、三辛酯、三癸酯和2，6-三级丁基-4-甲基苯酚组成的组中的一种。
  7. 根据权利要求1所述的BOPP消光膜，其特征在于：所述第一抗静电剂和所述第二抗静电剂均为阴离子抗静电剂。
  8. 一种BOPP消光膜的制造方法，其特征在于：包括如下步骤，分别对第一原料、第二原料以及第三原料进行如下第一次过滤、第一次混料、第二次过滤、第二次混料、熔融挤出、铸片、第一次纵向拉伸、第一次横向拉伸、第二次纵向拉伸、第二次横向拉伸、牵引切边、验收、收卷、分切和成品，其中，所述熔融挤出温度为150-170℃，模头的温度200-220℃，所述铸片过程中急冷辊和水槽的温度均为10-15℃，所述纵向拉伸温度为90-110℃，纵向定型温度为110-120℃，纵向拉伸比为2-4倍，所述横向拉伸温度为110-135℃，横向定型温度为115-156℃，横向拉伸比为2-7倍。
  9. 一种如权利要求8所述的BOPP消光膜的制造方法，其特征在于：包括如下步骤：
    分别将所述第一原料、所述第二原料和所述第三原料置于第一过滤设备中进行第一次过滤，经第一次过滤后的所述第一原料、所述第二原料和所述第三原料分别置于搅拌设备中进行搅拌，混合均匀；再将所述第一原料、所述第二原料和所述第三原料置于第二过滤设备中进行第二次过滤，经第二次过滤后的物料分别置于搅拌设备中进行搅拌，再次混合均匀；
    在熔融温度150-170℃下，将分别混合均匀后的所述第一原料、所述第二原料和所述第三原料分别经挤出设备加热后熔融塑化形成第一熔体、第二熔体以及第三熔体，所述第一熔体、所述第二熔体以及所述第三熔体分别进入各自对应的模头并在所述模头出口处汇合，分三层挤出，所述模头的温度200-220℃；
    挤出的熔体贴附在急冷辊的表面，经水槽冷却后固化成片材，其中所述急冷辊和所述水槽的温度均为10-15℃；
    对所述片材依次置于纵向拉伸机中进行所述第一次纵向拉伸，经纵向拉伸后的片材被牵引进入横向拉伸机中进行所述第一次横向拉伸，所述片材接着被牵引进行所述第二次纵向拉伸以及所述第二次横向拉伸，在所述第一次纵向拉伸以及所述第二次纵 向拉伸中，纵向拉伸温度均为90-110℃，纵向定型温度均为110-120℃，纵向拉伸比均为2-4倍，在所述第一次横向拉伸以及所述第二次横向拉伸中，横向拉伸温度均为110-135℃，横向定型温度均为115-156℃，横向拉伸比均为2-7倍；
    对拉伸后的所述片材的边缘进行切边休整；对切边后的所述片材进行验收，验收合格的所述片材经收卷后分切成预设规格，获得成品BOPP消光膜。
  10. 根据权利要求9所述的BOPP消光膜的制造方法，其特征在于：所述挤出设备包括主挤出机以及位于所述主挤出机两侧的两个辅挤出机，所述第一原料和所述第三原料经由两个所述辅挤出机挤出，所述第二原料经由所述主挤出机挤出。
  11. 根据权利要求10所述的BOPP消光膜的制造方法，其特征在于：在所述第一原料和所述第三原料进入所述辅挤出机以及所述第二原料进入所述主挤出机之前，将所述主挤出机和所述辅挤出机的加热区加热至所述熔融温度150-170℃，使所述第一原料、所述第二原料以及所述第三原料分别熔融。
  12. 根据权利要求9所述的BOPP消光膜的制造方法，其特征在于：在对所述片材进行所述第一次纵向拉伸以及所述第二次纵向拉伸之前，还包括将所述片材置于预热辊上进行预热，所述预热的温度从40-50℃逐渐提高至80-90℃。
  13. 根据权利要求9所述的BOPP消光膜的制造方法，其特征在于：所述第一过滤设备的孔径大于所述第二过滤设备的孔径。
  14. 根据权利要求13所述的BOPP消光膜的制造方法，其特征在于：所述第一原料、所述第二原料以及所述第三原料经第一次过滤后的粒径为180-240目，优选为180-220目；所述第一原料、所述第二原料以及所述第三原料经第二次过滤后的粒径为260-300目，优选为260-280目。
  15. 根据权利要求9所述的BOPP消光膜的制造方法，其特征在于：对所述片材的边缘进行切边休整后的宽度为120-150mm。
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