CN220008889U - Preparation system of heat-shrinkable film with reclaimed materials - Google Patents
Preparation system of heat-shrinkable film with reclaimed materials Download PDFInfo
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- CN220008889U CN220008889U CN202321509090.8U CN202321509090U CN220008889U CN 220008889 U CN220008889 U CN 220008889U CN 202321509090 U CN202321509090 U CN 202321509090U CN 220008889 U CN220008889 U CN 220008889U
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- dryer
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- shrinkable film
- magnesium carbonate
- speed mixer
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- 239000000463 material Substances 0.000 title claims abstract description 64
- 229920006257 Heat-shrinkable film Polymers 0.000 title claims abstract description 44
- 238000002360 preparation method Methods 0.000 title claims abstract description 27
- 229920000728 polyester Polymers 0.000 claims abstract description 30
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 claims abstract description 22
- 239000001095 magnesium carbonate Substances 0.000 claims abstract description 22
- 229910000021 magnesium carbonate Inorganic materials 0.000 claims abstract description 22
- GVGUFUZHNYFZLC-UHFFFAOYSA-N dodecyl benzenesulfonate;sodium Chemical compound [Na].CCCCCCCCCCCCOS(=O)(=O)C1=CC=CC=C1 GVGUFUZHNYFZLC-UHFFFAOYSA-N 0.000 claims abstract description 15
- 229940080264 sodium dodecylbenzenesulfonate Drugs 0.000 claims abstract description 15
- VZEGPPPCKHRYGO-UHFFFAOYSA-N diethoxyphosphorylbenzene Chemical compound CCOP(=O)(OCC)C1=CC=CC=C1 VZEGPPPCKHRYGO-UHFFFAOYSA-N 0.000 claims abstract description 10
- XFRVVPUIAFSTFO-UHFFFAOYSA-N 1-Tridecanol Chemical compound CCCCCCCCCCCCCO XFRVVPUIAFSTFO-UHFFFAOYSA-N 0.000 claims abstract description 9
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims abstract description 9
- 229940087291 tridecyl alcohol Drugs 0.000 claims abstract description 9
- 238000007605 air drying Methods 0.000 claims description 13
- 238000004064 recycling Methods 0.000 claims description 10
- 238000010298 pulverizing process Methods 0.000 claims description 4
- 239000008187 granular material Substances 0.000 claims 2
- 239000000654 additive Substances 0.000 abstract description 11
- 230000004048 modification Effects 0.000 abstract description 8
- 238000012986 modification Methods 0.000 abstract description 8
- 230000007613 environmental effect Effects 0.000 abstract description 5
- 229920000139 polyethylene terephthalate Polymers 0.000 description 27
- 239000005020 polyethylene terephthalate Substances 0.000 description 27
- 239000002245 particle Substances 0.000 description 15
- 239000004033 plastic Substances 0.000 description 13
- 229920003023 plastic Polymers 0.000 description 13
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 12
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 11
- 230000000052 comparative effect Effects 0.000 description 11
- 238000004140 cleaning Methods 0.000 description 10
- -1 cyclic ester Chemical class 0.000 description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 9
- 235000013361 beverage Nutrition 0.000 description 9
- HZAXFHJVJLSVMW-UHFFFAOYSA-N 2-Aminoethan-1-ol Chemical compound NCCO HZAXFHJVJLSVMW-UHFFFAOYSA-N 0.000 description 8
- KKEYFWRCBNTPAC-UHFFFAOYSA-N Terephthalic acid Chemical compound OC(=O)C1=CC=C(C(O)=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-N 0.000 description 8
- 230000000996 additive effect Effects 0.000 description 8
- 238000001035 drying Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 239000002994 raw material Substances 0.000 description 7
- 239000003054 catalyst Substances 0.000 description 6
- 238000005188 flotation Methods 0.000 description 5
- 239000010410 layer Substances 0.000 description 5
- 230000008602 contraction Effects 0.000 description 4
- 238000005886 esterification reaction Methods 0.000 description 4
- 239000012760 heat stabilizer Substances 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- 239000002699 waste material Substances 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000006068 polycondensation reaction Methods 0.000 description 3
- 239000002904 solvent Substances 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- XRBXGZZMKCBTFP-UHFFFAOYSA-N 4-(2,2-dihydroxyethoxycarbonyl)benzoic acid Chemical compound OC(O)COC(=O)C1=CC=C(C(O)=O)C=C1 XRBXGZZMKCBTFP-UHFFFAOYSA-N 0.000 description 2
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- ADCOVFLJGNWWNZ-UHFFFAOYSA-N antimony trioxide Chemical compound O=[Sb]O[Sb]=O ADCOVFLJGNWWNZ-UHFFFAOYSA-N 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 229920001577 copolymer Polymers 0.000 description 2
- WOZVHXUHUFLZGK-UHFFFAOYSA-N dimethyl terephthalate Chemical compound COC(=O)C1=CC=C(C(=O)OC)C=C1 WOZVHXUHUFLZGK-UHFFFAOYSA-N 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- YBMRDBCBODYGJE-UHFFFAOYSA-N germanium dioxide Chemical compound O=[Ge]=O YBMRDBCBODYGJE-UHFFFAOYSA-N 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- QQVIHTHCMHWDBS-UHFFFAOYSA-N isophthalic acid Chemical compound OC(=O)C1=CC=CC(C(O)=O)=C1 QQVIHTHCMHWDBS-UHFFFAOYSA-N 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 239000005022 packaging material Substances 0.000 description 2
- 229920005644 polyethylene terephthalate glycol copolymer Polymers 0.000 description 2
- 230000008929 regeneration Effects 0.000 description 2
- 238000011069 regeneration method Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- XZZNDPSIHUTMOC-UHFFFAOYSA-N triphenyl phosphate Chemical compound C=1C=CC=CC=1OP(OC=1C=CC=CC=1)(=O)OC1=CC=CC=C1 XZZNDPSIHUTMOC-UHFFFAOYSA-N 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- ORLQHILJRHBSAY-UHFFFAOYSA-N [1-(hydroxymethyl)cyclohexyl]methanol Chemical compound OCC1(CO)CCCCC1 ORLQHILJRHBSAY-UHFFFAOYSA-N 0.000 description 1
- NXDJCCBHUGWQPG-UHFFFAOYSA-N [4-(hydroxymethyl)cyclohexyl]methanol;terephthalic acid Chemical compound OCC1CCC(CO)CC1.OC(=O)C1=CC=C(C(O)=O)C=C1 NXDJCCBHUGWQPG-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 244000052616 bacterial pathogen Species 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-N carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- UYAAVKFHBMJOJZ-UHFFFAOYSA-N diimidazo[1,3-b:1',3'-e]pyrazine-5,10-dione Chemical compound O=C1C2=CN=CN2C(=O)C2=CN=CN12 UYAAVKFHBMJOJZ-UHFFFAOYSA-N 0.000 description 1
- BTVWZWFKMIUSGS-UHFFFAOYSA-N dimethylethyleneglycol Natural products CC(C)(O)CO BTVWZWFKMIUSGS-UHFFFAOYSA-N 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000032050 esterification Effects 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 229940119177 germanium dioxide Drugs 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 150000003016 phosphoric acids Chemical class 0.000 description 1
- 229920003207 poly(ethylene-2,6-naphthalate) Polymers 0.000 description 1
- 229920001707 polybutylene terephthalate Polymers 0.000 description 1
- 239000011112 polyethylene naphthalate Substances 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 229920000137 polyphosphoric acid Polymers 0.000 description 1
- 229920002215 polytrimethylene terephthalate Polymers 0.000 description 1
- 229940116423 propylene glycol diacetate Drugs 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- ISIJQEHRDSCQIU-UHFFFAOYSA-N tert-butyl 2,7-diazaspiro[4.5]decane-7-carboxylate Chemical compound C1N(C(=O)OC(C)(C)C)CCCC11CNCC1 ISIJQEHRDSCQIU-UHFFFAOYSA-N 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
- 238000005809 transesterification reaction Methods 0.000 description 1
- DQWPFSLDHJDLRL-UHFFFAOYSA-N triethyl phosphate Chemical compound CCOP(=O)(OCC)OCC DQWPFSLDHJDLRL-UHFFFAOYSA-N 0.000 description 1
- WVLBCYQITXONBZ-UHFFFAOYSA-N trimethyl phosphate Chemical compound COP(=O)(OC)OC WVLBCYQITXONBZ-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
Abstract
The utility model provides a preparation system of a heat-shrinkable film with reclaimed materials, which comprises a reclaimed material preparation device, a polyester chip dryer, a magnesium carbonate dryer, a sodium dodecyl benzene sulfonate dryer and a high-speed mixer; the high-speed mixer is respectively connected with a polyester chip dryer, a magnesium carbonate dryer, a sodium dodecyl benzene sulfonate dryer, a diethyl phenylphosphonate conveying pipe and a tridecyl alcohol stearate conveying pipe through input pipelines; the high-speed mixer is connected with the double-screw extruder through an output pipeline, and the output end of the double-screw extruder is connected with the film drawing device. The preparation system can perform melt modification treatment on recycled materials, recycled additives and polyester chips prepared by recycled PET bottles or heat-shrinkable film labels to prepare the heat-shrinkable film with recycled materials, and the prepared heat-shrinkable film can meet the requirements of environmental protection and high quality.
Description
Technical Field
The utility model relates to a preparation system of a heat-shrinkable film with reclaimed materials.
Background
Because of the increasing usage of plastics, waste plastics have caused serious environmental pollution, but waste plastics are an important renewable resource. The recycled plastic is a plastic in different forms which still has recycling value after the service life is finished, and almost all thermoplastics have recycling value. The waste plastics are generally changed into various transparent and opaque plastic particles through screening, crushing, granulating and other processes, and then classified according to the quality and the phase, and finally become recyclable plastic particles capable of being reused. However, most of the recycled plastic particles such as beverage bottles can only be used as low-grade raw materials, and are difficult to apply to fields with high requirements on appearance and environmental protection. For example, heat-shrinkable films are an outer packaging material that can be significantly reduced in size after heating, and are widely used as outer packages for various consumer and industrial goods. Heat-shrinkable films as outer packaging materials are generally required to have good mechanical properties, a large transverse stretching ratio, high transparency, and fire resistance. The common recycled plastics have the problems of aging and color change due to different sources and larger component differences of different plastic products, and the prepared plastic particles are difficult to directly apply to the preparation of the heat-shrinkable film.
Disclosure of Invention
The technical problem underlying the present utility model is to provide a system for preparing a heat-shrinkable film with recycled material, which reduces or avoids the aforementioned problems.
In order to solve the technical problems, the utility model provides a preparation system of a heat-shrinkable film with reclaimed materials, which comprises a reclaimed material preparation device, a polyester chip dryer, a magnesium carbonate dryer, a sodium dodecyl benzene sulfonate dryer and a high-speed mixer; the high-speed mixer is respectively connected with a polyester chip dryer, a magnesium carbonate dryer, a sodium dodecyl benzene sulfonate dryer, a diethyl phenylphosphonate conveying pipe and a tridecyl alcohol stearate conveying pipe through input pipelines; the high-speed mixer is connected with the double-screw extruder through an output pipeline, and the output end of the double-screw extruder is connected with the film drawing device.
Preferably, the reclaimed material preparation device comprises a pulverizer, an air-drying winnowing machine, a decoloring cleaning machine and a recycling particle dryer, wherein the pulverizer is used for pulverizing a recycled PET bottle or a thermal shrinkage film label, the output end of the pulverizer is connected with the air-drying winnowing machine, the output end of the air-drying winnowing machine is connected with the decoloring cleaning machine, and the output end of the decoloring cleaning machine is connected with the recycling particle dryer.
Preferably, the input end of the magnesium carbonate dryer is further connected with a magnesium carbonate pulverizer.
The preparation system can perform melt modification treatment on recycled materials, recycled additives and polyester chips prepared by recycled PET bottles or heat-shrinkable film labels to prepare the heat-shrinkable film with recycled materials, and the prepared heat-shrinkable film can meet the requirements of environmental protection and high quality.
Drawings
The following drawings are only for purposes of illustration and explanation of the present utility model and are not intended to limit the scope of the utility model.
FIG. 1 is a schematic view showing the construction of a system for producing a heat-shrinkable film having reclaimed materials of the present utility model.
Detailed Description
For a clearer understanding of technical features, objects, and effects of the present utility model, a specific embodiment of the present utility model will be described with reference to the accompanying drawings. Wherein like parts are designated by like reference numerals.
As described above, the recycled material made of plastic products such as waste beverage bottles cannot be used for directly producing a high quality heat-shrinkable film, and therefore the present utility model proposes a heat-shrinkable film having a recycled material obtained by adding a recycling additive to the recycled material and melt-blending with polyester chips and finally extrusion molding.
The reclaimed materials can be obtained through crushing, decoloring and cleaning the reclaimed PET bottle or the thermal shrinkage film label, and the reclaimed materials with the average particle size of 100-150 mu m are selected for standby.
The polyester chip of the present utility model may be produced by polycondensation of a dibasic acid and a dibasic alcohol, or may be produced by polycondensation of a hydroxycarboxylic acid and an ester-forming derivative or cyclic ester thereof. In one embodiment, the polyester chips used in the present utility model are preferably polyethylene terephthalate (PET), polybutylene terephthalate, polytrimethylene terephthalate, poly (1, 4-cyclohexanedimethanol terephthalate) (PCT), polyethylene naphthalate, polybutylene naphthalate, polytrimethylene naphthalate and copolymers thereof. Polyethylene terephthalate (PET) and its copolymers are particularly preferred.
The preparation method of the polyester chip takes PET as an example. The preferred preparation method comprises the following steps: firstly, the dihydroxyethyl terephthalate is prepared by esterification or transesterification of terephthalic acid or dimethyl terephthalate and ethylene glycol. Then, a polycondensation reaction is carried out under high temperature and vacuum conditions by using a catalyst, and the dihydroxyethyl terephthalate is polycondensed into polyethylene terephthalate (PET). In a specific embodiment, terephthalic acid, ethylene glycol, cyclohexanedimethanol, a catalyst and a heat stabilizer may be used as raw materials for the esterification reaction; or using terephthalic acid, ethylene glycol, isophthalic acid, a catalyst and a heat stabilizer as raw materials for esterification reaction. The catalyst can be any one compound of Ti/Si series non-heavy metal catalyst and antimonous oxide, and the addition amount of the catalyst is 0.01-0.09% of the mass of the polyester. The heat stabilizer can be any one of phosphoric acid compounds such as phosphoric acid, phosphorous acid, polyphosphoric acid, trimethyl phosphate, triphenyl phosphate and triethyl phosphate, and the addition amount of the heat stabilizer is 0.0003-0.030% of the mass of the polyester.
In another embodiment of the present utility model, the polyester chips of the present utility model can be prepared by the following method: adding 5.0kg of terephthalic acid, 2.2kg of ethylene glycol and 1.10g of germanium dioxide into a 20L general polymerization reaction kettle, carrying out esterification reaction under the conditions of 230-265 ℃ and 0.2-0.3 Mpa (gauge pressure), decompressing to normal pressure when the water yield reaches 1200ml, adding 1.025g of triphenyl phosphate, stirring for 10 minutes at normal pressure, heating and decompressing to below 280 ℃ and the pressure below 100Pa, carrying out extrusion, granulating and drying, and finally obtaining the polyester chip.
In one embodiment, the regeneration additive of the present utility model consists of diethyl phenylphosphonate, sodium dodecylbenzenesulfonate, tridecyl alcohol stearate, magnesium carbonate. Wherein, the content of each component of the regeneration additive in the heat-shrinkable film is preferably as follows: 0.5 to 9.0 weight percent of diethyl phenylphosphonate, 0.1 to 3.0 weight percent of sodium dodecyl benzene sulfonate, 0.3 to 6.0 weight percent of tridecyl alcohol stearate and 0.1 to 3.0 weight percent of magnesium carbonate. More preferably, the content of each component of the recycling additive in the heat-shrinkable film is: 0.5 to 7.5 weight percent of diethyl phenylphosphonate, 0.15 to 1.5 weight percent of sodium dodecyl benzene sulfonate, 0.3 to 4.5 weight percent of tridecyl alcohol stearate and 0.15 to 1.5 weight percent of magnesium carbonate.
In the utility model, the regenerated material is added with a regenerated additive to carry out melting modification treatment with a polyester chip, and then the regenerated material is extruded to form the heat-shrinkable film with the regenerated material, and the heat-shrinkable film can be extruded to form a film with a single-layer structure, can be matched with other polyester raw materials, and can form the heat-shrinkable film with a multi-layer structure in a multi-layer coextrusion mode, wherein the film layer with the regenerated material can be a surface layer or an intermediate layer.
In one embodiment, the heat-shrinkable film of the present utility model is prepared from 145 to 600 parts by weight of recycled material, 50 to 70 parts by weight of recycled additive, and 140 to 5800 parts by weight of polyester chips.
Wherein, the preparation steps of the regenerated material of the utility model are as follows: and (3) taking transparent particles obtained after the recovered PET bottle or the thermal shrinkage film label is crushed, decolored and cleaned as reclaimed materials. The PET beverage bottles are usually provided with labels, most of the PET beverage bottles are heat shrinkage film labels tightly combined with the bottle body, and the small part of the PET beverage bottles are adhered easily-torn type labels, so that the PET beverage bottles are very small in density and easy to sort and reject after being crushed. The recovered PET bottle needs to be removed from the bottle cap, and only the bottle body is utilized. The bottleneck part of most of the existing PET beverage bottles is usually made of an integrated molding process, and the bottleneck part is made of the same material as the bottle body. Some special field bottles, such as injection bottles in medical field, have different materials for the mouth and body parts and may have germs, and need to be removed.
Specifically, the preparation steps of the reclaimed material of the present utility model further comprise: and crushing the recovered PET bottle or the thermal shrinkage film label, drying in the air while crushing, and removing impurities with low density and high density through winnowing after the air drying. Because liquid may remain in the beverage bottle, it is necessary to perform an air-drying operation while pulverizing the beverage bottle to avoid the difficulty in drying the particulate matter, and the dried material is easily subjected to an air separation operation.
The material after winnowing is decolorized by a solvent. For example, a decoloring solvent commonly used in the art may be selected for the decoloring treatment. In one embodiment, the decolorizing agent may be selected from the group consisting of 20 to 30 weight percent propylene glycol diacetate, 50 to 60 weight percent dimethyl sulfoxide, and 10 to 30 weight percent activated carbon. The materials and the decoloring agent are soaked for 10 to 24 hours according to the volume ratio of 1:2, and are continuously stirred at the speed of 20 to 30 revolutions per minute.
And discharging liquid after the decoloring treatment, injecting clear water, standing, and removing active carbon through floatation cleaning. The mass ratio of the materials to the clean water is preferably 1:3-1:5. The activated carbon adsorbed with the liquid has high density and is sunk into the water bottom, and the PET particles have low density and float on the upper layer, so the PET particles are easily fished out through floatation, and the activated carbon is removed. In addition, the high-density impurities which are not removed by the prior air separation can be further removed by flotation. The flotation process also has a cleaning effect and can be repeatedly operated for a plurality of times (the number of times of flotation can be selected according to the observed condition because the activated carbon is dark or not to be completely seen).
During flotation, as the materials are repeatedly cleaned, preferably sodium hydroxide with the total mass of 1.5-3% of the clean water and ethanolamine with the total mass of 0.5-1.0% of the clean water are added into the injected clean water, so that the materials are subjected to surface treatment, the attached solvent is removed as much as possible, and meanwhile, the surface properties of the materials are changed, so that the subsequent modification treatment is facilitated.
The material after flotation and cleaning is required to be dried, and the reclaimed material with the grain diameter of 100-150 mu m is separated for standby. The water content of the regenerated material prepared by detection is required to be lower than 0.1%.
The method of producing the heat shrinkable film of the present utility model is described in further detail below, and in one embodiment, the method of producing the present utility model includes the following steps.
Firstly, drying polyester chips for 4 hours at 65-75 ℃, drying magnesium carbonate with the particle size of 0.3-0.5 mu m for 4 hours at 65-75 ℃, drying sodium dodecyl benzene sulfonate for 4 hours at 65-75 ℃, metering the regenerated materials with the water content lower than 0.1% with the dried polyester chips, the magnesium carbonate, the sodium dodecyl benzene sulfonate and the diethyl phenylphosphonate, and the tridecyl alcohol stearate respectively by an electronic scale, and then, entering a high-speed mixer for dispersion mixing, wherein the rotating speed is 1000-1500 rpm, and mixing for 15-30 minutes; respectively putting the materials into a double-screw extruder, adjusting the temperature of the double-screw extruder to 265-275 ℃, melting, filtering, and extruding thick sheets.
For example, in a preferred embodiment, the weight parts of each material weighed may be: 145-600 parts of reclaimed materials, 140-5800 parts of polyester chips, 25-30 parts of diethyl phenylphosphonate, 5-10 parts of sodium dodecyl benzene sulfonate, 15-20 parts of tridecyl alcohol stearate and 5-10 parts of magnesium carbonate.
After the thick sheet is prepared, preheating the thick sheet at 50-90 ℃, entering an infrared heating zone at 300-500 ℃, and longitudinally stretching at a linear speed of 40-150 m/min, wherein the longitudinal stretching multiplying power is 3.0-4.5, thus obtaining the stretched sheet. Then preheating the stretch sheet at 90-120 ℃, and transversely stretching at 100-160 ℃ with a transverse stretching multiplying power of 3.0-4.5. And then shaping at 165-250 ℃, cooling at 100-50 ℃, shaping, cooling and rolling to obtain the heat-shrinkable film.
Examples 1 to 3
Raw materials were prepared in parts by weight as shown in the following table, and a heat-shrinkable film having a thickness of 50 μm was prepared according to the aforementioned preparation method.
Examples 4 to 6
A heat shrinkable film having a thickness of 50 μm was produced in accordance with the same parts by weight of the raw materials as in examples 1 to 3. Unlike examples 1 to 3, in example 4, only sodium hydroxide was added during the sorting and washing of the reclaimed material, in example 5, only ethanolamine was added during the sorting and washing of the reclaimed material, and in example 6, sodium hydroxide and ethanolamine were not added during the sorting and washing of the reclaimed material.
The performance parameters of the heat-shrinkable films prepared in examples 4 to 6 above were measured respectively and are shown in the table.
By comparison, the performance of the heat-shrinkable film can be properly improved by adding sodium hydroxide and ethanolamine in the cleaning process.
Comparative examples 1 to 3
Comparative examples 1 to 3 raw materials were prepared in parts by weight as shown in the following table, and heat-shrinkable films having a thickness of 50 μm were prepared according to the aforementioned preparation methods.
Comparative examples 4 to 6
Comparative examples 4-6 the reworked material was directly mixed with polyester chips to prepare a heat-shrinkable film having a thickness of 50 μm without adding any reworked additive components, parts by weight are shown in the following table.
| Comparative example 4 | Comparative example 5 | Comparative example 6 | |
| Polyester chip | 140(PET) | 2970(PETG) | 5800(PET) |
| Reclaimed material | 145 | 370 | 600 |
Comparative examples 7 to 8
Comparative examples 7-8 heat-shrinkable films having a thickness of 50 μm were directly prepared from polyester chips without reworking, wherein comparative examples 7 and 8 were prepared using 100% PET and PETG, respectively.
The performance parameters of the heat-shrinkable films prepared in comparative examples 1 to 8 described above were measured, respectively, and are shown in the table.
As can be seen from comparison of performance parameters, the regenerated additive and the polyester chips are added into the regenerated material prepared from the recovered PET bottle or the thermal contraction film label for fusion modification treatment, and then the regenerated material is extruded to form the thermal contraction film with the regenerated material, so that the prepared thermal contraction film has the regenerated material which can meet the environmental protection requirement, and can be directly used for preparing the high-quality thermal contraction film after modification.
The system for producing a heat-shrinkable film having a reclaimed material according to the present utility model is described in further detail below with reference to the accompanying drawings.
As shown in the drawing, the system for preparing a heat-shrinkable film having a reclaimed material of the present utility model comprises a reclaimed material preparation apparatus 200, a polyester chip dryer 10, a magnesium carbonate dryer 20, a sodium dodecylbenzenesulfonate dryer 30 and a high-speed mixer 60; the high-speed mixer 60 is respectively connected with the polyester chip dryer 10, the magnesium carbonate dryer 20, the sodium dodecyl benzene sulfonate dryer 30, the diethyl phenylphosphonate conveying pipe 40 and the tridecyl alcohol stearate conveying pipe 50 through an input pipeline 61; the high-speed mixer 60 is connected with the double-screw extruder 70 through an output pipeline 62, and the output end of the double-screw extruder 70 is connected with the film drawing device 400.
Further, the input end of the magnesium carbonate dryer 20 may be connected to a magnesium carbonate pulverizer 21 for pulverizing magnesium carbonate to a particle size of 0.3 to 0.5 μm for the next drying process.
The regenerated material preparation device 200 comprises a crusher 201, an air-drying winnowing machine 202, a decoloring cleaner 203 and a recycling particle dryer 204, wherein the crusher 201 is used for crushing recycled PET bottles or heat-shrinkable film labels, the output end of the crusher 201 is connected with the air-drying winnowing machine 202, the output end of the air-drying winnowing machine 202 is connected with the decoloring cleaner 203, and the output end of the decoloring cleaner 203 is connected with the recycling particle dryer 204.
When the reclaimed material preparation device 200 works, the pulverizer 201 pulverizes the reclaimed PET bottles or the heat-shrinkable film labels, then enters the air-drying winnowing machine 202 for air-drying and winnowing, enters the decoloring and cleaning machine 203 for decoloring and cleaning operation after the winnowing, and finally enters the reclaimed particle dryer 204 for drying treatment.
The reclaimed materials with the water content lower than 0.1% prepared by the reclaimed material preparation device 200, the dried polyester chips, magnesium carbonate, sodium dodecyl benzene sulfonate and diethyl phenylphosphonate are respectively input into a high-speed mixer 60 through an input pipeline 61 for dispersion mixing, then are input into a double-screw extruder 70 through an output pipeline 62 for filtration and are extruded into thick sheets, and finally the thick sheets are input into a film drawing device 400 for drawing to prepare the heat-shrinkable film.
In summary, the preparation system of the utility model can perform melt modification treatment on recycled materials, recycled additives and polyester chips prepared by recycled PET bottles or heat-shrinkable film labels to prepare heat-shrinkable films with recycled materials, and the prepared heat-shrinkable films can meet the requirements of environmental protection and high quality.
It should be understood by those skilled in the art that while the present utility model has been described in terms of several embodiments, not every embodiment contains only one independent technical solution. The description is given for clearness of understanding only, and those skilled in the art will understand the description as a whole and will recognize that the technical solutions described in the various embodiments may be combined with one another to understand the scope of the present utility model.
The foregoing is illustrative of the present utility model and is not to be construed as limiting the scope of the utility model. Any equivalent alterations, modifications and combinations thereof will be effected by those skilled in the art without departing from the spirit and principles of this utility model, and it is intended to be within the scope of the utility model.
Claims (3)
1. A preparation system of a heat-shrinkable film with reclaimed materials, which is characterized by comprising a reclaimed material preparation device (200), a polyester chip dryer (10), a magnesium carbonate dryer (20), a sodium dodecyl benzene sulfonate dryer (30) and a high-speed mixer (60); the high-speed mixer (60) is respectively connected with a polyester chip dryer (10), a magnesium carbonate dryer (20), a sodium dodecyl benzene sulfonate dryer (30), a diethyl phenylphosphonate conveying pipe (40) and a tridecyl alcohol stearate conveying pipe (50) through an input pipeline (61); the high-speed mixer (60) is connected with the double-screw extruder (70) through the output pipeline (62), and the output end of the double-screw extruder (70) is connected with the film drawing device (400).
2. The preparation system of claim 1, wherein the reclaimed material preparation apparatus (200) comprises a pulverizer (201), an air-drying air separator (202), a decoloring washer (203) and a recycling granule dryer (204), wherein the pulverizer (201) is used for pulverizing recycled PET bottles or heat-shrinkable film labels, an output end of the pulverizer (201) is connected with the air-drying air separator (202), an output end of the air-drying air separator (202) is connected with the decoloring washer (203), and an output end of the decoloring washer (203) is connected with the recycling granule dryer (204).
3. The preparation system according to claim 2, characterized in that the input of the magnesium carbonate dryer (20) is further connected with a magnesium carbonate pulverizer (21).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321509090.8U CN220008889U (en) | 2023-06-13 | 2023-06-13 | Preparation system of heat-shrinkable film with reclaimed materials |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202321509090.8U CN220008889U (en) | 2023-06-13 | 2023-06-13 | Preparation system of heat-shrinkable film with reclaimed materials |
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| CN220008889U true CN220008889U (en) | 2023-11-14 |
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| CN202321509090.8U Active CN220008889U (en) | 2023-06-13 | 2023-06-13 | Preparation system of heat-shrinkable film with reclaimed materials |
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