CN107868383A - The preparation method of water proof type corrugated board core material - Google Patents
The preparation method of water proof type corrugated board core material Download PDFInfo
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- CN107868383A CN107868383A CN201711197504.7A CN201711197504A CN107868383A CN 107868383 A CN107868383 A CN 107868383A CN 201711197504 A CN201711197504 A CN 201711197504A CN 107868383 A CN107868383 A CN 107868383A
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- core material
- corrugated board
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- water proof
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L51/00—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
- C08L51/04—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers grafted on to rubbers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L15/00—Compositions of rubber derivatives
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L53/00—Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
- C08L53/02—Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers of vinyl-aromatic monomers and conjugated dienes
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L9/00—Compositions of homopolymers or copolymers of conjugated diene hydrocarbons
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L9/00—Compositions of homopolymers or copolymers of conjugated diene hydrocarbons
- C08L9/02—Copolymers with acrylonitrile
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2296—Oxides; Hydroxides of metals of zinc
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Laminated Bodies (AREA)
Abstract
The invention discloses a kind of preparation method of water proof type corrugated board core material, mainly including following raw material：Modified natural rubber, butadiene rubber, nitrile rubber, thermoplastic elastomer SBS, rosin resin acid, PPG, carbon black, naphthenic oil, three last of the ten Heavenly stems esters, poly- methyl diphenylene diisocyanate, carboxymethyl chitosan, sericin liquid, epoxidized soybean oil, stearic acid, calcium carbonate, resistant to thermal aging agent, resistance to acid assistant, resistance to salt assitant, plasticizer, accelerator, softening agent and vulcanizing agent.The present invention uses rational raw material and proportioning, and each component complements each other, and acts synergistically, and the core material for making to produce has acidproof, salt tolerant, resistant to thermal aging, the characteristic of waterproof, suitable for the waterproof requirement of corrugated board.
Description
Technical field
The present invention relates to field of packaging material, more particularly to the preparation method of water proof type corrugated board core material.
Background technology
The usage history of corrugated board can trace back to for 18 end of the centurys.19th century, it has been found that corrugated board is not only light
Performance is strong, and the more general material of price is more cheap, and manufacture craft is simple, and purposes is more extensive.Moreover, corrugated paper
Plate serves not only as being the recoverable environmental protection type material being made up of the wood-fibred that can be decomposed through operation of nature, while can also be repeated profit
With the performance without influenceing its performance.Therefore people are enjoyed to favor.
Corrugated board is the adherend of a multilayer, and it is at least made up of one layer of waveform core paper interlayer and a layer paperboard.
It has very high mechanical strength, can support collision in by handling process and fall and fall.The extensive application of corrugated paper has also promoted corrugation
The development of paper production, the manufacturing machine of corrugated paper are constantly updated.
The increase of the requirement of corrugated paper just proposes higher requirement, corrugated paper life of today to corrugated paper production efficiency
Mechanization or semi-mechanization epoch have been stepped into production.
The water resistance of existing corrugated board is poor, and when meeting water, adhesive strength can decline, moisture can penetrate facial tissue,
Corrugated paper and inner paper, further result in phenomena such as corrugated case water suction softens, edge degumming warps, deformed and occur as causing interior
Portion's commodity are rotten, damage, so being badly in need of developing a kind of water proof type corrugated board core material instantly, to meet at this stage to corrugated board
Waterproof requirement.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of preparation method of water proof type corrugated board core material.
The technical problems to be solved by the invention are realized using following technical scheme：
The preparation method of water proof type corrugated board core material, comprises the following steps：
Step1, modified natural rubber, butadiene rubber, nitrile rubber and thermoplastic elastomer SBS are poured into adding pressure type rubber
Masticator, pressurize at 140-150 DEG C and discharged after smashing glue 30 minutes, obtain mixture A；
Step2, by rosin resin acid, PPG, carbon black, naphthenic oil, three last of the ten Heavenly stems esters, the isocyanide of poly- diphenyl methane two
Acid esters and carboxymethyl chitosan, which are added in ultrasonic dispersing machine, to be disperseed, ultrasonic power 180-200W, and jitter time is
30-50 minutes, dispersion temperature are 150-160 DEG C, obtain mixture B；
Step3, mixture A and mixture B are stirred, are subsequently poured into banbury, adds sericin
Liquid, epoxidized soybean oil, stearic acid and calcium carbonate are small with 800-950 revs/min of speed banburying half under conditions of 120-130 DEG C
When, obtain mixture C；
Step4, mixture C is added in ultrasonic dispersing machine and disperseed, ultrasonic power 200-220W, when disperseing
Between be 1.5-2 hours, dispersion temperature is 150-160 DEG C, then adds resistant to thermal aging agent, resistance to acid assistant, resistance to salt assitant, plasticising
Agent, accelerator and softening agent, adjustment ultrasonic power are 220-240W, and jitter time is 20-30 minutes, dispersion temperature 160-
170 DEG C, obtain mixture D；
Step5, mixture D is added in banbury, with 100 DEG C, 600-650 revs/min of mixing speed banburying 3 minutes,
Temperature is then warming up to 160 DEG C according to 5 DEG C/min heating rate, 10 minutes are incubated at 160 DEG C, according still further to 10 DEG C/min
Heating rate rise to temperature as 220 DEG C；
Step6, the sizing material obtained in step 5 and vulcanizing agent are mixed evenly, then in 170-185 DEG C, 25-
Under the conditions of 30Mpa, vulcanize the 100-150 seconds in vulcanizing press, anti-glue is kneaded 10-15 minutes on a mill after discharging, so
Laminal core material finished product, finished product thickness 1-2mm are pressed on trigger squeeze afterwards.
Further, the modified natural rubber is grafted natural rubber, one kind in epoxy natural rubber or two
The composition of kind, the polymerisable monomer of the grafted natural rubber is methyl methacrylate, styrene, acrylonitrile, acetic acid second
One or more kinds of compositions in alkene ester, acrylamide, ethyl acrylate, butyl acrylate.
Further, the carbon black is that carbon black N683 and carbon black N880 presses 2:1 ratio mixes.
Further, the resistant to thermal aging agent consists of the following components in percentage by weight：Aluminum plating glass microballon 30%, stone
Oily barium sulfonate 20%, calcium sulfate crystal whiskers powder 10%, zinc oxide 15%, titanium dioxide 15%, sulphur 10%.
Further, the resistance to acid assistant is metasilicate pentahydrate sodium.
Further, the resistance to salt assitant is methyl methacrylate, and TBPB tertiary butyl perbenzoate, Tissuemat E is by 5:3:
1 ratio mixes.
Further, the plasticizer is citric acid ester plasticizer.
Further, the accelerator is dibenzothiazyl disulfide, 2-mercaptobenzothiazole, and the curing tetrabutyl autumn is blue
Nurse, diphenylguanidine, N cyclohexyl 2 benzothiazole sulfenamide press 10:7:5:3:1 ratio mixes.
Further, the softening agent is that paraffin oil and dioctyl ester press 3:1 ratio mixes.
Beneficial effects of the present invention：The present invention uses rational raw material and proportioning, and each component complements each other, and acts synergistically,
The core material for making to produce has acidproof, salt tolerant, resistant to thermal aging, the characteristic of waterproof, suitable for the waterproof requirement of corrugated board.
Brief description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, used required for being described below to embodiment
Accompanying drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for ability
For the those of ordinary skill of domain, on the premise of not paying creative work, it can also be obtained according to these accompanying drawings other attached
Figure.
Fig. 1 is the structural representation of corrugated board in embodiment 2；
In accompanying drawing, the list of parts representated by each label is as follows：
1- facial tissues, 2- corrugated papers, 3- core materials, paper in 4-.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made
Embodiment, belong to the scope of protection of the invention.
, it is necessary to explanation in description of the invention, the orientation of instruction such as term " vertical ", " on ", " under ", " level " or
Person's position relationship is based on orientation shown in the drawings or position relationship, is for only for ease of and describes this practicality and simplify to describe,
Rather than instruction either implies that signified device or element must have specific orientation, with specific azimuth configuration and behaviour
Make, therefore be not considered as limiting the invention.In addition, " first ", " second ", " the 3rd ", " the 4th " are only used for describing mesh
, and it is not intended that instruction or hint relative importance.
In description of the invention, it is also necessary to explanation, unless otherwise clear and definite regulation and limitation, term " setting ", " peace
Dress ", " connected ", " connection " should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or integratedly
Connection, can be mechanical connection or electrical connection, can be directly connected to or be connected by intermediary, can
To be the connection of two element internals.For the ordinary skill in the art, can understand as the case may be above-mentioned
The concrete meaning of term in the present invention.
As shown in Figure 1：
Embodiment 1
The preparation method of water proof type corrugated board core material, comprises the following steps：
Step1, modified natural rubber, butadiene rubber, nitrile rubber and thermoplastic elastomer SBS are poured into adding pressure type rubber
Masticator, pressurize at 140-150 DEG C and discharged after smashing glue 30 minutes, obtain mixture A；
Step2, by rosin resin acid, PPG, carbon black, naphthenic oil, three last of the ten Heavenly stems esters, the isocyanide of poly- diphenyl methane two
Acid esters and carboxymethyl chitosan, which are added in ultrasonic dispersing machine, to be disperseed, ultrasonic power 180-200W, and jitter time is
30-50 minutes, dispersion temperature are 150-160 DEG C, obtain mixture B；
Step3, mixture A and mixture B are stirred, are subsequently poured into banbury, adds sericin
Liquid, epoxidized soybean oil, stearic acid and calcium carbonate are small with 800-950 revs/min of speed banburying half under conditions of 120-130 DEG C
When, obtain mixture C；
Step4, mixture C is added in ultrasonic dispersing machine and disperseed, ultrasonic power 200-220W, when disperseing
Between be 1.5-2 hours, dispersion temperature is 150-160 DEG C, then adds resistant to thermal aging agent, resistance to acid assistant, resistance to salt assitant, plasticising
Agent, accelerator and softening agent, adjustment ultrasonic power are 220-240W, and jitter time is 20-30 minutes, dispersion temperature 160-
170 DEG C, obtain mixture D；
Step5, mixture D is added in banbury, with 100 DEG C, 600-650 revs/min of mixing speed banburying 3 minutes,
Temperature is then warming up to 160 DEG C according to 5 DEG C/min heating rate, 10 minutes are incubated at 160 DEG C, according still further to 10 DEG C/min
Heating rate rise to temperature as 220 DEG C；
Step6, the sizing material obtained in step 5 and vulcanizing agent are mixed evenly, then in 170-185 DEG C, 25-
Under the conditions of 30Mpa, vulcanize the 100-150 seconds in vulcanizing press, anti-glue is kneaded 10-15 minutes on a mill after discharging, so
Laminal core material finished product, finished product thickness 1-2mm are pressed on trigger squeeze afterwards.
Further, the modified natural rubber is grafted natural rubber, one kind in epoxy natural rubber or two
The composition of kind, the polymerisable monomer of the grafted natural rubber is methyl methacrylate, styrene, acrylonitrile, acetic acid second
One or more kinds of compositions in alkene ester, acrylamide, ethyl acrylate, butyl acrylate.
Further, the carbon black is that carbon black N683 and carbon black N880 presses 2:1 ratio mixes.
Further, the resistant to thermal aging agent consists of the following components in percentage by weight：Aluminum plating glass microballon 30%, stone
Oily barium sulfonate 20%, calcium sulfate crystal whiskers powder 10%, zinc oxide 15%, titanium dioxide 15%, sulphur 10%.
Further, the resistance to acid assistant is metasilicate pentahydrate sodium.
Further, the resistance to salt assitant is methyl methacrylate, and TBPB tertiary butyl perbenzoate, Tissuemat E is by 5:3:
1 ratio mixes.
Further, the plasticizer is citric acid ester plasticizer.
Further, the accelerator is dibenzothiazyl disulfide, 2-mercaptobenzothiazole, and the curing tetrabutyl autumn is blue
Nurse, diphenylguanidine, N cyclohexyl 2 benzothiazole sulfenamide press 10:7:5:3:1 ratio mixes.
Further, the softening agent is that paraffin oil and dioctyl ester press 3:1 ratio mixes.
Embodiment 2
A kind of water proof type corrugated board, including facial tissue 1, corrugated paper 2, core material 3 and inner paper 4, the corrugated paper 2 set two altogether
Layer, is provided with facial tissue 1 positioned at the both sides of core material 3, the top of upside corrugated paper 2 respectively, and the lower section of downside corrugated paper 2 is provided with inner paper 4,
Pass through adhesive bond between the facial tissue 1, corrugated paper 2, core material 3 and inner paper 4；
The core material 3 uses core material produced by the present invention；
The adhesive is prepared by the raw material of following parts by weight：150 parts of starch, 15 parts of sodium acid carbonate, dodecane
12 parts of base dimethyl benzyl ammonium chloride, 6 parts of defoamer, 32 parts of gelatine, 280 parts of water, 12 parts of isopropanol, 6 parts of nano silicon,
3 parts of lignin fiber, 4 parts of modifying agent.
Further, the modifying agent is that glutinous rice flour and borax press 5:3 ratio mixes.
The present invention uses rational raw material and proportioning, and each component complements each other, and acts synergistically, and the core material for making to produce has
It is acidproof, salt tolerant, resistant to thermal aging, the characteristic of waterproof, suitable for the waterproof requirement of corrugated board.
When water is met on corrugated board surface, only facial tissue 1 can be moist, inside core material 3 in paper 4 and corrugated paper 2 will not
Moisture is penetrated into, so situations such as being not in degumming, softening, deformation, requirement is met, can be widely applied to corrugation paper bag
Vanning production field.
Experimental verification, above-described embodiment 2 is verified, and take the common corrugated board in market to compare, obtain dependency number
According to as follows：
The general principle and principal character of the present invention has been shown and described above.It should be understood by those skilled in the art that
The present invention is not limited to the above embodiments, merely illustrating the principles of the invention described in above-described embodiment and specification,
Without departing from the spirit and scope, various changes and modifications of the present invention are possible, and these changes and improvements all fall
Enter in scope of the claimed invention.The scope of the present invention is defined by the appended claims and its equivalents.
Claims (9)
1. the preparation method of water proof type corrugated board core material, it is characterised in that comprise the following steps：
Step1, modified natural rubber, butadiene rubber, nitrile rubber and thermoplastic elastomer SBS are poured into adding pressure type rubber kneading
Machine, pressurize at 140-150 DEG C and discharged after smashing glue 30 minutes, obtain mixture A；
Step2, by rosin resin acid, PPG, carbon black, naphthenic oil, three last of the ten Heavenly stems esters, poly- methyl diphenylene diisocyanate
Add in ultrasonic dispersing machine and disperseed with carboxymethyl chitosan, ultrasonic power 180-200W, jitter time 30-50
Minute, dispersion temperature is 150-160 DEG C, obtains mixture B；
Step3, mixture A and mixture B are stirred, are subsequently poured into banbury, add sericin liquid, ring
Oxygen soybean oil, stearic acid and calcium carbonate, under conditions of 120-130 DEG C, with 800-950 revs/min of speed banburying half an hour, obtain
To mixture C；
Step4, will be disperseed, ultrasonic power 200-220W in mixture C addition ultrasonic dispersing machine, and jitter time is
1.5-2 hours, dispersion temperature be 150-160 DEG C, then add resistant to thermal aging agent, resistance to acid assistant, resistance to salt assitant, plasticizer,
Accelerator and softening agent, adjustment ultrasonic power are 220-240W, and jitter time is 20-30 minutes, dispersion temperature 160-170
DEG C, obtain mixture D；
Step5, mixture D is added in banbury, with 100 DEG C, 600-650 revs/min of mixing speed banburying 3 minutes, then
Temperature is warming up to 160 DEG C according to 5 DEG C/min heating rate, 10 minutes are incubated at 160 DEG C, according still further to 10 DEG C/min liter
Warm speed rises to temperature as 220 DEG C；
Step6, the sizing material obtained in step 5 and vulcanizing agent are mixed evenly, then in 170-185 DEG C, 25-30Mpa bars
Under part, vulcanize the 100-150 seconds in vulcanizing press, anti-glue is kneaded 10-15 minutes on a mill after discharging, then in pressing plate
Laminal core material finished product, finished product thickness 1-2mm are pressed on machine.
2. the preparation method of water proof type corrugated board core material according to claim 1, it is characterised in that the modified natural
Rubber is one or two kinds of composition in grafted natural rubber, epoxy natural rubber, the grafted natural rubber
Polymerisable monomer is methyl methacrylate, styrene, acrylonitrile, vinylacetate, acrylamide, ethyl acrylate, propylene
One or more kinds of compositions in acid butyl ester.
3. the preparation method of water proof type corrugated board core material according to claim 1, it is characterised in that the carbon black is charcoal
Black N683 and carbon black N880 presses 2:1 ratio mixes.
4. the preparation method of water proof type corrugated board core material according to claim 1, it is characterised in that the resistant to thermal aging
Agent consists of the following components in percentage by weight：Aluminum plating glass microballon 30%, barium mahogany sulfonate 20%, calcium sulfate crystal whiskers powder
10%, zinc oxide 15%, titanium dioxide 15%, sulphur 10%.
5. the preparation method of water proof type corrugated board core material according to claim 1, it is characterised in that the resistance to acid assistant
For metasilicate pentahydrate sodium.
6. the preparation method of water proof type corrugated board core material according to claim 1, it is characterised in that the resistance to salt assitant
For methyl methacrylate, TBPB tertiary butyl perbenzoate, Tissuemat E presses 5:3:1 ratio mixes.
7. the preparation method of water proof type corrugated board core material according to claim 1, it is characterised in that the plasticizer is
Citric acid ester plasticizer.
8. the preparation method of water proof type corrugated board core material according to claim 1, it is characterised in that the accelerator is
Dibenzothiazyl disulfide, 2-mercaptobenzothiazole, tetrabutylthiuram disulfide, diphenylguanidine, N- cyclohexyl -2-[4-morpholinodithio
Sulfenamide presses 10:7:5:3:1 ratio mixes.
9. the preparation method of water proof type corrugated board core material according to claim 1, it is characterised in that the softening agent is
Paraffin oil and dioctyl ester press 3:1 ratio mixes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201711197504.7A CN107868383A (en) | 2017-11-25 | 2017-11-25 | The preparation method of water proof type corrugated board core material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201711197504.7A CN107868383A (en) | 2017-11-25 | 2017-11-25 | The preparation method of water proof type corrugated board core material |
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| CN107868383A true CN107868383A (en) | 2018-04-03 |
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| CN201711197504.7A Pending CN107868383A (en) | 2017-11-25 | 2017-11-25 | The preparation method of water proof type corrugated board core material |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110804896A (en) * | 2019-11-13 | 2020-02-18 | 鲍双铭 | Corrugated paper pulp with waterproof and fireproof characteristics |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204472044U (en) * | 2015-02-06 | 2015-07-15 | 浙江宏印包装有限公司 | A kind of water proof type high-strength corrugated board |
| CN106009106A (en) * | 2016-06-27 | 2016-10-12 | 许展 | High-temperature-aging-resistant rubber |
| CN107353820A (en) * | 2017-08-03 | 2017-11-17 | 安徽新智电力科技有限公司 | A kind of power transmission tower surface anti-corrosive paints and preparation method thereof |
| CN107383447A (en) * | 2017-08-17 | 2017-11-24 | 安徽卓越电力设备有限公司 | A kind of anti-aging cable jacket material |
-
2017
- 2017-11-25 CN CN201711197504.7A patent/CN107868383A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204472044U (en) * | 2015-02-06 | 2015-07-15 | 浙江宏印包装有限公司 | A kind of water proof type high-strength corrugated board |
| CN106009106A (en) * | 2016-06-27 | 2016-10-12 | 许展 | High-temperature-aging-resistant rubber |
| CN107353820A (en) * | 2017-08-03 | 2017-11-17 | 安徽新智电力科技有限公司 | A kind of power transmission tower surface anti-corrosive paints and preparation method thereof |
| CN107383447A (en) * | 2017-08-17 | 2017-11-24 | 安徽卓越电力设备有限公司 | A kind of anti-aging cable jacket material |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110804896A (en) * | 2019-11-13 | 2020-02-18 | 鲍双铭 | Corrugated paper pulp with waterproof and fireproof characteristics |
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