CN107383676A - A kind of environmentally friendly toy for children film and preparation method thereof - Google Patents

A kind of environmentally friendly toy for children film and preparation method thereof Download PDF

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Publication number
CN107383676A
CN107383676A CN201710561117.0A CN201710561117A CN107383676A CN 107383676 A CN107383676 A CN 107383676A CN 201710561117 A CN201710561117 A CN 201710561117A CN 107383676 A CN107383676 A CN 107383676A
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CN
China
Prior art keywords
toy
environmentally friendly
parts
children
preparation
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Pending
Application number
CN201710561117.0A
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Chinese (zh)
Inventor
刘锦柱
贺小云
方寄民
刘斌
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GUANGDONG GUANSHENG PLASTICS CO Ltd
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GUANGDONG GUANSHENG PLASTICS CO Ltd
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Priority to CN201710561117.0A priority Critical patent/CN107383676A/en
Publication of CN107383676A publication Critical patent/CN107383676A/en
Pending legal-status Critical Current

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    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08LCOMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L27/00Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers
    • C08L27/02Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L27/04Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
    • C08L27/06Homopolymers or copolymers of vinyl chloride
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J5/00Manufacture of articles or shaped materials containing macromolecular substances
    • C08J5/18Manufacture of films or sheets
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2327/00Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers
    • C08J2327/02Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment
    • C08J2327/04Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
    • C08J2327/06Homopolymers or copolymers of vinyl chloride
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2491/00Characterised by the use of oils, fats or waxes; Derivatives thereof
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08KUse of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K2201/00Specific properties of additives
    • C08K2201/014Additives containing two or more different additives of the same subgroup in C08K
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08LCOMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2203/00Applications
    • C08L2203/16Applications used for films

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  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Toys (AREA)

Abstract

A kind of environmentally friendly toy for children film of the present invention and preparation method thereof, include the following raw materials according of mass fraction:100 parts of the polyvinyl chloride resin powder of the degree of polymerization 1,300 2500, add 50 70 parts citrate environment-friendly plasticizer, 23 parts of epoxidized soybean oil, 0.3 0.6 parts of lubricant, 1.5 2.5 parts of colorant, 25 parts of environmentally friendly calcium-zinc composite stabilizing agent and 1.5 2.5 parts of processing aid, the present invention have the advantages that to be free of phthalate, without bisphenol-A, meet the German class standard of polycyclic aromatic hydrocarbon 1, meet national toy technical specification of security GB6675 2003.Compared with prior art, product employs the polyvinyl chloride resin powder of ethylene process high polymerization degree and is process, and has excellent physical and mechanical properties, it is ensured that product meets European Union EN71 1《Toy safety part 1s:Machinery and physical property》It is required that it is process from citrate environment-friendly plasticizer as materials such as primary plasticizer, high-performance environment-friendly calcium-zinc composite stabilizing agents.So as to realize the requirement for meeting national toy technical specification of security GB6675 2003.

Description

A kind of environmentally friendly toy for children film and preparation method thereof
Technical field
The present invention relates to chemical technology field, new material class, the processed and applied technology of high-molecular organic material are specific next Say it is a kind of environmentally friendly toy for children film and preparation method thereof.
Background technology
Phthalic acid ester Phthalates is one group of chemical compound, is mainly used in pvc material, makes polychlorostyrene second Alkene is changed into flexible plastic cement from hard plastic glue, plays a part of plasticizer.This material is widely present in cosmetics, Er Tongwan In tool, packaging for foodstuff, if its content overproof, very big harm can be produced to health.Research shows that phthalate exists The effect of human body female hormone similar with being played in animal body, may interfere with endocrine, as people are to (adjacent to Phthalates Phthalate) understanding, the phthalate in articles for children is increasingly taken seriously.Expert has found to contain phthalic acid The flexible plastic toy and articles for children of salt are possible to be put into mouth by child, if the time long enough placed, may result in neighbour The stripping quantity of Phthalate exceedes level of security, can endanger the liver and kidney of children, can also cause children's sexual precocity to endanger.
Polycyclic aromatic hydrocarbon (Polycyclic Aromatic Hydrocarbons PAHs) is coal, oil, timber, tobacco, is had Volatile hydrocarbon caused by the organic matter imperfect combustion such as machine high-molecular compound, it is that important environment and food are dirty Contaminate thing.Hitherto it is found that there is more than 200 kinds of PAHs, wherein there is considerable part that there is carcinogenicity, such as benzo[α, benzo α anthracenes etc.. PAHs is distributed widely in environment, can be found in each corner that we live, in polycyclic aromatic hydrocarbon molecule containing two with The hydrocarbon of upper phenyl ring, including naphthalene, anthracene, phenanthrene, pyrene etc. more than 150 plant compound.
According to experts, polycyclic aromatic hydrocarbon is a kind of organic compound, there is very strong carcinogenicity, can by breathing or Direct skin contact makes human carcinogen.Maximum to body effect among polycyclic aromatic hydrocarbon is BaP, is a kind of Mutagen, is One carcinogenic material, it is a fat-soluble stronger material, this can be drawn into vivo, into alveolar even blood, lead Cause lung cancer and angiocardiopathy.
Bisphenol-A is formed by two molecule phenol and a molecule condensation of acetone, is important Organic Chemicals, frequently as polymerization Inhibitor is added in PVC.Bisphenol-A can trigger the hormonal reaction of human body, long-time inspiration bisphenol-A powder similar to estrogen It is harmful to liver function and renal function, especially severe is that it can reduce the content of ferroheme in blood.There are some researches prove 18 months Baby before may by plastics jarred baby foods, baby's plastic bottle, plastic toy Excess free enthalpy are this has female to swash The chemicals of element effect, although content is very low, but if concentration is got up, than the amount of estrogen contained naturally in mankind body Want high about 1000 times.On October 18th, 2008, federal government of Canada announced, determined bisphenol-A (BPA) being included in Toxic In matter list, it means that this chemicals for being widely used in packaging for foodstuff will be prohibitted the use of in Canada soon, and science is ground Very clearly, threat of the bisphenol-A for health is very big to the evidence studied carefully, particularly with children and developmental tire Youngster, forbid selling product of the Ganlei containing bisphenol-A if the multiple states of European Union and the U.S. have been made laws.
Its difficult point is:
1. the regulation that each country is limited harmful substance in toy for children is inconsistent, it is necessary in view of each national method Rule;
2. the limited content for the product bisphenol-A of toy for children is too low, it is desirable to bisphenol-A (BPA) is less than 1mg/kg, it is difficult to Control;
3. the limitation for the product polycyclic aromatic hydrocarbon of toy for children is strict, it is desirable to less than 0.2mg/kg, it is easy to surpass Target phenomenon;Polycyclic aromatic hydrocarbon (PAHs) is coal, oil, timber, tobacco, the organic matter imperfect combustion such as organic high molecular compound Caused volatile hydrocarbon, it is easy to decompose in process of manufacture;
4. toy for children film is highly contaminating in process of manufacture, toy for children film is in process of manufacture It is easy to occur decomposing to produce polycyclic aromatic hydrocarbon, production equipment, raw material, which bring impurity into, causes phthalate, polycyclic aromatic hydrocarbon to surpass Mark.
The content of the invention
Instant invention overcomes in the prior art the shortcomings that, there is provided a kind of environmentally friendly toy for children film and preparation method thereof, symbol Various countries' toy for children articles for use environmental regulation is closed, without being limited by country variant toy for children articles for use environmental regulation.
In order to solve the above-mentioned technical problem, the present invention is achieved by the following technical solutions:
A kind of environmentally friendly toy for children film, include the following raw materials according of mass fraction:Degree of polymerization 1300-2500 polyvinyl chloride tree 100 parts of cosmetics, add the citrate environment-friendly plasticizer of 50-70 parts, the epoxidized soybean oil of 2-3 parts, the lubrication of 0.3-0.6 parts Agent, the colorant of 1.5-2.5 parts, 2-5 parts environmentally friendly calcium-zinc composite stabilizing agent and 1.5-2.5 part processing aid.
Further, it is additionally added the graphene of 1-2 parts of the polyvinyl chloride resin powder.
A kind of preparation method of environmentally friendly toy for children film, comprises the following steps:
1) dispensing and metering;
2) dispensing hot mixing;
3) banburying;
4) roll squeezer carries out roll-in;
5) filtering extruder is filtered;
6) deflect from and after wheel is drawn be embossed by embossed wheel;
7) thickness measuring is carried out to toy for children film by calibrator;
8) water cooling wheel cools down to toy for children film;
9) trimming and curling are cut.
Further, the step of dispensing hot mixing includes:First low rate start mixer, then the right 1300-2500 of addition polymerization Polyvinyl chloride resin powder, then plus environmentally friendly calcium-zinc composite stabilizing agent, lubricant, graphene and colorant;Low speed rotation high speed, when mixed Temperature is closed to 80 DEG C, starts to be gradually added into citrate environment-friendly plasticizer, when plasticizer is sufficiently mixed, adds processing aid, by Gradually being warmed to 115 DEG C can stop stirring.
Further, deflect from and take turns the calendering wheel for including setting gradually and deflect from roller, the roller that deflects from passes for two along toy film Dynamic orient diameter increase deflects from roller.
Further, described deflect from takes turns the calendering wheel for including setting gradually, deflects from roller and several dragging rollers
Further, the embossing includes vertical embossing and horizontal embossing.
Further, the calibrator includes beta ray source and β ray receivers.
Further, the trimming includes cooling down cutting position, carries out trimming while cooling.
Further, cutting position also installs audio signal reception device, and the audio signal reception device is connected with audio contrast device.
Compared with prior art, the beneficial effects of the invention are as follows:
A kind of environmentally friendly toy for children film of the present invention and preparation method thereof, include the following raw materials according of mass fraction:Polymerization 1300-2500 100 parts of polyvinyl chloride resin powder is spent, adds the citrate environment-friendly plasticizer, the epoxy of 2-3 parts of 50-70 parts Soybean oil, the lubricant of 03-0.6 parts, the colorant of 1.5-2.5 parts, environmentally friendly calcium-zinc composite stabilizing agent and 1.5-2.5 part of 2-5 parts Processing aid, the present invention has without phthalate, without bisphenol-A, meet the German class standard of polycyclic aromatic hydrocarbon 1, meet The advantages that national toy technical specification of security GB6675-2003.Compared with prior art, product employs ethylene process high polymerization degree Polyvinyl chloride resin powder be process, there is excellent physical and mechanical properties, it is ensured that product meets European Union EN71-1《Toy is pacified Full part 1s:Machinery and physical property》It is required that from citrate environment-friendly plasticizer as primary plasticizer, high-performance environment-friendly The materials such as calcium-zinc composite stabilizing agent are process.Meet wanting for national toy technical specification of security GB6675-2003 so as to realize Ask.
Brief description of the drawings
Accompanying drawing is used for providing a further understanding of the present invention, is used to explain the present invention together with embodiments of the present invention, It is not construed as limiting the invention, in the accompanying drawings:
Fig. 1 is a kind of structural representation of the preparation method of environmentally friendly toy for children film of the present invention;
Fig. 2 is that embodiment 1 deflects from wheel construction schematic diagram;
Fig. 3 is that embodiment 2 deflects from wheel construction schematic diagram;
Fig. 4 is the structural representation being vertically embossed;
Fig. 5 is the structural representation of horizontal embossing;
Fig. 6 is the structural representation of calibrator;
Fig. 7 is the structural representation of trimming.
In figure, 1 --- proportioner;2 --- metering device;
3 --- mixer;4 --- banbury;
5 --- roll squeezer;6 --- filtering extruder;
7 --- deflect from wheel;8 --- calendering wheel;
9 --- deflect from roller;10 --- rubber wheel;
11 --- embossed wheel;12 --- calibrator;
13 --- beta ray source device;14 --- β rays receive;
15 --- water cooling wheel;16 --- cutting position;
17 --- cutting knife;18 --- dragging roller.
Embodiment
The preferred embodiments of the present invention are illustrated below in conjunction with accompanying drawing, it will be appreciated that described herein preferred real Apply example to be merely to illustrate and explain the present invention, be not intended to limit the present invention.
A kind of environmentally friendly toy for children film, include the following raw materials according of mass fraction:Degree of polymerization 1300-2500 polyvinyl chloride tree 100 parts of cosmetics, add 60 parts citrate environment-friendly plasticizer, 2.5 parts of epoxidized soybean oil, 0.5 part of lubricant, 2 parts Colorant, 3 parts of environmentally friendly calcium-zinc composite stabilizing agent and 2 parts of processing aids acrylic resin, are additionally added polyvinyl chloride resin powder 1.5 The graphene of part, graphene make toy film in the case where not adding other dispensings, have excellent physical and mechanical properties, really Protect product and meet European Union EN71-1《Toy safety part 1s:Machinery and physical property》It is required that.
Embodiment 1:
As shown in figure 1, a kind of preparation method of environmentally friendly toy for children film of the present invention, comprises the following steps:
1) proportioner 1 carries out dispensing and metering device 2 is measured;
2) dispensing hot mixing, include the step of dispensing hot mixing:First low rate start mixer 3, then the right 1300- of addition polymerization 2500 polyvinyl chloride resin powder, then add environmentally friendly calcium-zinc composite stabilizing agent, lubricant, graphene and colorant;Low speed rotation high speed, When mixing temperature is to 80 DEG C, start to be gradually added into citrate environment-friendly plasticizer, when plasticizer is sufficiently mixed, adds processing and help Agent, being gradually warmed to 115 DEG C can stop stirring, and raw material proportioning combines the raw material adition process, and the temperature used, make each Composition mixes and reaction, product is reached the performance of requirement;
3) banbury 4 carries out banburying;
4) roll squeezer 5 carries out roll-in;
5) filtering extruder 6 is filtered;
6) deflect from wheel 7 to be drawn, take turns the 7 calendering wheels 8 for including setting gradually as shown in Fig. 2 deflecting from and deflect from roller 9, draw It is two from roller 9 and deflects from roller 9 along the increase of toy film transmission direction diameter, wheel 7 is deflected from by the structure, realizes toy film Stretch, be then embossed by rubber wheel 10 and embossed wheel 11, as shown in figure 4, the present embodiment is using vertical embossing;
7) as shown in fig. 6, carrying out thickness measuring to toy for children film by calibrator 12, calibrator 12 includes beta ray source 13 and β Ray receiver 14;
8) water cooling wheel 15 cools down to toy for children film;
9) as shown in fig. 7, trimming and curling are cut, trimming includes cooling down cutting position 16, enters while cooling Row trimming, cut in the case of cooling by cutting knife 17, cutting is more neat, and cutting position 16 also installs audio signal reception device, receives Mixer is connected with audio contrast device, and audio signal reception device monitors sound during cutting, when sound and inconsistent reserved sound, enters Row alarm, toy film cutting position 16 are likely to occur the substandard products such as flash.
The present invention has without phthalate, without bisphenol-A, meet the German class standard of polycyclic aromatic hydrocarbon 1, meet country The advantages that toy safety technical specification GB6675-2003.Compared with prior art, product employs the poly- of ethylene process high polymerization degree Vinyl chloride resin powder is process, and has excellent physical and mechanical properties, it is ensured that product meets European Union EN71-1《Toy safety Part 1:Machinery and physical property》It is required that from citrate environment-friendly plasticizer as primary plasticizer, high-performance environment-friendly calcium zinc The materials such as compound stabilizer are process.So as to realize the requirement for meeting national toy technical specification of security GB6675-2003.
Embodiment 2:
The present embodiment and the technical scheme of embodiment 1 are essentially identical, and something in common repeats no more, and its difference is:
Take turns the calendering wheel 8 for including setting gradually as shown in figure 3, deflecting from, deflect from roller 9 and several dragging rollers 18, passing through the knot Structure, stretching for toy film is realized, beneficial to embossing below, as shown in figure 5, using horizontal embossing.
Finally it should be noted that:The preferred embodiments of the present invention are these are only, are not intended to limit the invention, although The present invention is described in detail with reference to embodiment, for those skilled in the art, it still can be to foregoing Technical scheme described in each embodiment is modified, or to which part technical characteristic carry out equivalent substitution, but it is all Within the spirit and principles in the present invention, any modification, equivalent substitution and improvements made etc., the protection of the present invention should be included in Within the scope of.

Claims (10)

  1. A kind of 1. environmentally friendly toy for children film, it is characterised in that the following raw materials according including mass fraction:Degree of polymerization 1300-2500's 100 parts of polyvinyl chloride resin powder, add the citrate environment-friendly plasticizer of 50-70 parts, the epoxidized soybean oil of 2-3 parts, 0.3-0.6 Part lubricant, the colorant of 1.5-2.5 parts, 2-5 parts environmentally friendly calcium-zinc composite stabilizing agent and 1.5-2.5 part processing aid.
  2. 2. a kind of preparation method of environmentally friendly toy for children film according to claim 1, it is characterised in that be additionally added the polychlorostyrene The graphene of 1-2 parts of vinyl powder.
  3. 3. a kind of preparation method of environmentally friendly toy for children film according to claim 1, it is characterised in that comprise the following steps:
    1) dispensing and metering;
    2) dispensing hot mixing;
    3) banburying;
    4) roll squeezer carries out roll-in;
    5) filtering extruder is filtered;
    6) deflect from and after wheel is drawn be embossed by embossed wheel;
    7) thickness measuring is carried out to toy for children film by calibrator;
    8) water cooling wheel cools down to toy for children film;
    9) trimming and curling are cut.
  4. A kind of 4. preparation method of environmentally friendly toy for children film according to claim 3, it is characterised in that the dispensing hot mixing The step of include:First low rate start mixer, then the right 1300-2500 of addition polymerization polyvinyl chloride resin powder, then add environmentally friendly calcium Zinc composite stabilizer, lubricant, graphene and colorant;Low speed rotation at a high speed, when mixing temperature is to 80 DEG C, starts to be gradually added into lemon Acid esters environment-friendly plasticizer, when plasticizer is sufficiently mixed, addition processing aid, being gradually warmed to 115 DEG C can stop stirring.
  5. 5. a kind of preparation method of environmentally friendly toy for children film according to claim 3, it is characterised in that the wheel that deflects from includes The calendering wheel that sets gradually and roller is deflected from, the roller that deflects from deflects from roller for two along the increase of toy film transmission direction diameter.
  6. 6. a kind of preparation method of environmentally friendly toy for children film according to claim 3, it is characterised in that the wheel that deflects from includes The calendering wheel that sets gradually, deflect from roller and several dragging rollers.
  7. 7. a kind of preparation method of environmentally friendly toy for children film according to claim 3, it is characterised in that the embossing includes hanging down Vertical compression is spent and horizontal embossing.
  8. 8. a kind of preparation method of environmentally friendly toy for children film according to claim 3, it is characterised in that the calibrator includes Beta ray source and β ray receivers.
  9. A kind of 9. preparation method of environmentally friendly toy for children film according to claim 3, it is characterised in that the trimming include pair Cutting position is cooled down, and carries out trimming while cooling.
  10. 10. a kind of preparation method of environmentally friendly toy for children film according to claim 9, it is characterised in that cutting position is also pacified Audio signal reception device is filled, the audio signal reception device is connected with audio contrast device.
CN201710561117.0A 2017-07-11 2017-07-11 A kind of environmentally friendly toy for children film and preparation method thereof Pending CN107383676A (en)

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Application Number Priority Date Filing Date Title
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108409574A (en) * 2018-04-16 2018-08-17 山东万图高分子材料股份有限公司 A kind of citrate and its preparation method and application
CN109280287A (en) * 2018-08-08 2019-01-29 广东冠盛新材料有限公司 A kind of fire-retardant electric heating blanket film and preparation method thereof
CN112169743A (en) * 2020-11-30 2021-01-05 北京艾科美特新材料开发有限公司 Inorganic-organic composite material preparation system

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103059473A (en) * 2013-01-09 2013-04-24 浙江明士达新材料有限公司 Super-wide environmental-friendly decorative film material and preparation technology thereof

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103059473A (en) * 2013-01-09 2013-04-24 浙江明士达新材料有限公司 Super-wide environmental-friendly decorative film material and preparation technology thereof

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108409574A (en) * 2018-04-16 2018-08-17 山东万图高分子材料股份有限公司 A kind of citrate and its preparation method and application
CN109280287A (en) * 2018-08-08 2019-01-29 广东冠盛新材料有限公司 A kind of fire-retardant electric heating blanket film and preparation method thereof
CN112169743A (en) * 2020-11-30 2021-01-05 北京艾科美特新材料开发有限公司 Inorganic-organic composite material preparation system
CN112169743B (en) * 2020-11-30 2021-03-23 北京艾科美特新材料开发有限公司 Inorganic-organic composite material preparation system

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Address after: 528315 Guangdong Foshan Shunde District Lecong Town, good village industrial zone

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Application publication date: 20171124