CN108117695A - A kind of antiseepage film repaired for liner overturning and preparation method thereof - Google Patents
A kind of antiseepage film repaired for liner overturning and preparation method thereof Download PDFInfo
- Publication number
- CN108117695A CN108117695A CN201711485091.2A CN201711485091A CN108117695A CN 108117695 A CN108117695 A CN 108117695A CN 201711485091 A CN201711485091 A CN 201711485091A CN 108117695 A CN108117695 A CN 108117695A
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- Prior art keywords
- parts
- liner
- overturning
- antiseepage film
- repaired
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L58/00—Protection of pipes or pipe fittings against corrosion or incrustation
- F16L58/02—Protection of pipes or pipe fittings against corrosion or incrustation by means of internal or external coatings
- F16L58/04—Coatings characterised by the materials used
- F16L58/10—Coatings characterised by the materials used by rubber or plastics
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2323/04—Homopolymers or copolymers of ethene
- C08J2323/08—Copolymers of ethene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2323/10—Homopolymers or copolymers of propene
- C08J2323/12—Polypropene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2423/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2423/04—Homopolymers or copolymers of ethene
- C08J2423/06—Polyethene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2423/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2423/04—Homopolymers or copolymers of ethene
- C08J2423/08—Copolymers of ethene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2423/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2423/10—Homopolymers or copolymers of propene
- C08J2423/12—Polypropene
Abstract
The invention discloses a kind of antiseepage films repaired for liner overturning and preparation method thereof, which is mainly made of the raw material of following mass parts：0.1 part~2 parts of 10 parts~100 parts of polypropylene, 0.5 part~20 parts of polyethylene, 10 parts~100 parts of polyolefin elastomer, 0.1 part~2 parts of antioxidant, 0.1 part~2 parts of stabilizer and UV absorbers.Preparation method includes polypropylene, polyethylene, polyolefin elastomer, antioxidant, stabilizer and UV absorbers being uniformly mixed, and then using casting technique or lamination technique is squeezed out, antiseepage film is made.The antiseepage film of the present invention can be overlayed on the non-woven fabrics of liner overturning composite material, have the characteristics that be firmly bonded, flexibility is good, waterproof, acid-alkali-corrosive-resisting and resistance to styrene ability are strong, heat resisting temperature is high, available for the liner hose for preparing liner overturning reparation, meets the needs of liner hose production domesticization.
Description
Technical field
The invention belongs to non-excavation rehabilitation field of material technology, be related to a kind of antiseepage film and preparation method thereof more particularly to
A kind of antiseepage film repaired for liner overturning and preparation method thereof.
Background technology
Traditional underground piping reparation needs first excavate damaged road section surface, are then repaired again, and effect on environment is big,
It is long in time limit, it is of high cost, it is unfavorable for constructing.Particularly in some heavy traffic, difficult location is excavated, traditional recovery scenario is more next
More it is difficult to carry out.In-situ solidifying lining technology is one, and lining repairs the technology of broken pipe again in pipeline.The technology because
Be not required to excavating earth surface, duty cycle is short, it is small to surrounding environment influence the features such as, be highly suitable for big city foggara, combustion gas
The repair of the broken pipes such as pipe.But a great problem faced using the technology is：Liner hose used excessively relies on import, not only
It is expensive, and order material from foreign countries and generally required one month or more to job location is transported to, along with weather etc. is uncertain
Factor, thus cause construction cost sharp rise and claim for eot so that the economic benefit and society that this technology is brought
Meeting benefit fails to embody completely, can not promote on a large scale at home.Liner hose is by antiseepage film, impregnating resin, weaving material
Material composition, wherein antiseepage film are overlayed on the outside of non-woven fabrics, are processed into tubulose.In use, internal lining pipe is passed through into the method for inside and outside overturning
Into pipeline, the non-woven fabrics for being soaked with resin is connected with broken pipe, and antiseepage film then forms one layer of smooth protective film in pipeline,
After steam is passed through or hot water makes resin solidification, so that it may new pipeline is formed inside broken pipe.Antiseepage film is in internal lining pipe
Important role not only requires good flexibility, and also impermeable, acid and alkali-resistance, resistance to styrene corrode, high temperature resistant
Deng.Made of based on the typically homogenous materials such as PP, TPU, PE or homogenous material that liner hose uses both at home and abroad at present
Antiseepage film, various aspects of performance are often difficult to take into account, and as TPU membrane corrosion resistance is strong, but heat resistance is not good enough；PP films need to increase thick
Degree, and flexibility is poor, and difficulty is brought to overturning；PE films flexibility is good but heat-resisting and corrosion resistance on it is poor.
The content of the invention
The technical problem to be solved by the present invention is to overcome the deficiencies in the prior art, are produced especially for existing liner hose
The defects of technology, provide that a kind of heat resisting temperature is high, flexibility is good, waterproof, acid-alkali-corrosive-resisting and resistance to styrene ability is strong is used for
Antiseepage film that liner overturning is repaired and preparation method thereof.
In order to solve the above technical problems, the present invention uses following technical scheme.
A kind of antiseepage film repaired for liner overturning, the antiseepage film are mainly made of the raw material of following mass parts：It is poly-
10 parts~100 parts of propylene, 0.5 part~20 parts of polyethylene, 10 parts~100 parts of polyolefin elastomer, 0.1 part~2 parts of antioxidant, surely
Determine 0.1 part~2 parts of 0.1 part~2 parts of agent and UV absorbers.
The above-mentioned antiseepage film repaired for liner overturning, it is preferred that 10 parts~50 parts of polypropylene, 0.5 part of polyethylene~
10 parts, 20 parts~70 parts of polyolefin elastomer, 0.1 part~1.5 parts of antioxidant, 0.1 part~1.5 parts of stabilizer and UV Absorption
0.1 part~1.5 parts of agent.
The above-mentioned antiseepage film repaired for liner overturning, it is preferred that the polyolefin elastomer is copolymerized for ethylene-octene
Object.
The above-mentioned antiseepage film repaired for liner overturning, it is preferred that the polyethylene is polyethylene from high pressure process.
The above-mentioned antiseepage film repaired for liner overturning, it is preferred that the antioxidant is antioxidant 1010, antioxidant
One or more of CA, anti-oxidant DLTP, irgasfos 168, antioxidant TNP, antioxidant TPP and antioxidant 264.
The above-mentioned antiseepage film repaired for liner overturning, it is preferred that the stabilizer is organotin, zinc stearate, hard
One or more of resin acid calcium, stearic acid tin, phosphite ester, glyceride and epoxidized soybean oil.
The above-mentioned antiseepage film repaired for liner overturning, it is preferred that the UV absorbers for 2- (2'- hydroxyls-
5'- aminomethyl phenyls) benzotriazole, ESCALOL 567,2-hydroxy-4-n-octoxybenzophenone, 4,
4- thiobis (6- Butylated Hydroxytoluenes), 2- (bis- tertiary phenyl of 2'- hydroxyls -3', 5'-) -5- chlorinations benzotriazole, single benzoic acid
One or more of resorcinol and three (1,2,2,6,6- pempidines base) phosphite esters.
The above-mentioned antiseepage film repaired for liner overturning, it is preferred that the antiseepage film passes through hot melt adhesive or lamination work
Skill is overlayed on the non-woven fabrics of liner overturning composite material.
The inventive concept total as one, the present invention also provides a kind of above-mentioned antiseepage films repaired for liner overturning
Preparation method comprises the following steps：By polypropylene, polyethylene, polyolefin elastomer, antioxidant, stabilizer and UV Absorption
Agent is uniformly mixed, and then using casting technique is squeezed out, temperature is controlled at 210 DEG C~330 DEG C, is made what is repaired for liner overturning
Antiseepage film.
The inventive concept total as one, the present invention also provides a kind of above-mentioned antiseepage films repaired for liner overturning
Preparation method comprises the following steps：By polypropylene, polyethylene, polyolefin elastomer, antioxidant, stabilizer and UV Absorption
Agent is uniformly mixed, and obtains mixed material, and using lamination technique, mixed material is directly drenched on non-woven fabrics, and adjustment temperature is 220
DEG C~350 DEG C, lamination speed 10kg/h~100kg/h, antiseepage film layer is made and overturns the antiseepage repaired to get to for liner
Film.
The present invention is based on drawbacks existing in the prior art, specially devise the antiseepage film repaired for liner overturning, pass through
Antiseepage film is made using polythene PE and polyolefin elastomer modified polypropene, passes through the synergistic effect of Multiple components so that interior
Lining hose composite material not only has the advantages that PP's is heat safe, at the same have concurrently good flexibility, be firmly bonded, surface it is scratch-resistant
The features such as trace, waterproof, strong acid-alkali-corrosive-resisting and resistance to styrene ability, can meet the need of growing internal lining pipe domestic material
It asks, to promoting the development of pipe rehabilitation technology, builds good living environment, raising construction efficiency and economic benefit have important
Meaning.
Compared with prior art, the advantage of the invention is that：
The antiseepage film prepared using the present invention adds in polyethylene and polyolefin elastomer in polypropylene, is made using a variety of collaborations
Antioxidant, high-efficiency stabilizing agent and UV absorbers prevent from aoxidizing under resin high temperature, improve resin compatible, improve resistance to
Hot temperature.Antiseepage film not only has the characteristics that heat safe, while also good film forming ability, and composite flexibility is good, table
Face is not easy to leave cut, is firmly bonded, and waterproof, acid-alkali-corrosive-resisting and resistance to styrene ability are strong etc., can meet pipeline rehabilitation material
The requirement of material.
Description of the drawings
Fig. 1 is the structure diagram of liner hose composite material in the embodiment of the present invention.
Fig. 2 is structure diagram of the both sides to the liner hose connected in the embodiment of the present invention.
Fig. 3 is the structure diagram of liner hard tube in the embodiment of the present invention.
Marginal data：
1st, antiseepage film；2nd, non-woven fabrics；3rd, the non-woven fabrics containing thermosetting resin.
Specific embodiment
Below in conjunction with Figure of description and specific preferred embodiment, the invention will be further described, but not therefore and
It limits the scope of the invention.
Material and instrument employed in following embodiment are commercially available.
Embodiment 1：
The antiseepage film repaired for liner overturning of present invention a kind of, the antiseepage film are made of the raw material of following mass parts：Poly- third
1 part of 100 parts of alkene, 20 parts of polyethylene, 100 parts of polyolefin elastomer, 1 part of antioxidant, 1 part of stabilizer and UV absorbers.
In the present embodiment, polyolefin elastomer is ethylene-octene copolymer POE, and polyethylene is polyethylene from high pressure process, antioxidant
For antioxidant CA, stabilizer is phosphite ester, and UV absorbers are 2- (2'- hydroxyl -5'- aminomethyl phenyls) benzotriazole.
A kind of preparation method of the antiseepage film repaired for liner overturning of above-mentioned the present embodiment, comprises the following steps：It will
Above-mentioned each raw material is uniformly mixed, and is then added to and is squeezed out in casting machine, adjusts 210 DEG C~330 DEG C of barrel zone temperature, antiseepage is made
Film.
The antiseepage film tensile property of the present embodiment is pressed《The measure third portion of GB/T1040-2006 plastic tensile performances：It is thin
The experimental condition of film and thin slice》Test, tensile strength are more than 20MPa, and elongation at break is more than 400%, heat-resistant deforming temperature 180
DEG C or more.
The antiseepage film of the present embodiment, which is overlayed on after hot melt on terylene needle punched non-woven fabrics, is made internal lining pipe composite material, such as Fig. 1
Shown in signal, the grammes per square metre of non-woven fabrics 2 is 600g/m2, the thickness of antiseepage film 1 is 0.6mm.Overlay film non-woven fabrics both sides are docked, are added
Work is into hose-like, as illustrated diagrammatically in fig. 2.Soaked in non-woven fabrics hose with thermosetting resin, overturn and be heating and curing can be prepared by it is interior
Hard tube is served as a contrast, as schematically in fig. 3.
The antiseepage film of the present invention can significantly improve modified polypropene by polyolefin elastomer and PE modified polypropylene
Film flexibility and film forming, and excellent heat resistance and resistance to corrosion are kept, coordinated using a variety of antioxidant, utilize antioxidant
Between synergistic effect, the heat resistance of modified polypropene film can be improved.
Embodiment 2：
The antiseepage film repaired for liner overturning of present invention a kind of, the antiseepage film are made of the raw material of following mass parts：Poly- third
20 parts of alkene, 10 parts of polyethylene, 50 parts of polyolefin elastomer, 0.5 part of antioxidant, 0.5 part of stabilizer and UV absorbers 0.5
Part.
In the present embodiment, polyolefin elastomer is ethylene-octene copolymer POE, and polyethylene is polyethylene from high pressure process, antioxidant
For antioxidant CA, stabilizer is phosphite ester, and UV absorbers are 2- (2'- hydroxyl -5'- aminomethyl phenyls) benzotriazole.
A kind of preparation method of the antiseepage film repaired for liner overturning of above-mentioned the present embodiment, comprises the following steps：It will
Above-mentioned each raw material is uniformly mixed, and is then added in laminating machine, 220~350 DEG C of adjustment temperature and 10~100kg/ of lamination speed
H using terylene needle punched non-woven fabrics as ground, prepares lamination non-woven fabrics, as schematically represented in figure 1, obtains antiseepage film 1.Terylene pin pierces nothing
Woven fabric grammes per square metre 400g/m2, lamination thickness 0.4mm.Overlay film non-woven fabrics both sides are docked, are processed into hose-like, as Fig. 2 illustrates institute
Show.The hose heat distortion temperature is 220 DEG C.Leaching forms the nothing containing thermosetting resin with thermosetting resin in non-woven fabrics hose
Woven fabric 3, overturns and is heating and curing and can be prepared by liner hard tube, as schematically in fig. 3.
Tensile strength according to《The measure GB/T10654- of high polymer stephanoporate elastic material tensile strength and elongation rate of tensile failure
2001》Tested, bending strength according to《The survey of textile fibreglass reinforced plastics roving reinforced resin stick mechanical performance
Determine part 2：The measure GB/T14208.2-2009 of bending strength》It is measured, the liner hard tube of embodiment 1 and embodiment 2
Tensile strength be all higher than 12MPa, bending strength is all higher than 31MPa, and bending modulus is all higher than 1724MPa.
The above described is only a preferred embodiment of the present invention, not make limitation in any form to the present invention.Though
So the present invention is disclosed as above with preferred embodiment, however is not limited to the present invention.It is any to be familiar with those skilled in the art
Member, in the case where not departing from the Spirit Essence of the present invention and technical solution, all using in the methods and techniques of the disclosure above
Appearance makes technical solution of the present invention many possible changes and modifications or is revised as the equivalent embodiment of equivalent variations.Therefore,
Every content without departing from technical solution of the present invention, technical spirit according to the invention is to made for any of the above embodiments any simple
Modification, equivalent substitution, equivalence changes and modification, still fall within technical solution of the present invention protection in the range of.
Claims (10)
1. a kind of antiseepage film repaired for liner overturning, which is characterized in that the antiseepage film is mainly by the original of following mass parts
Material is made：10 parts~100 parts of polypropylene, 0.5 part~20 parts of polyethylene, 10 parts~100 parts of polyolefin elastomer, antioxidant 0.1
0.1 part~2 parts of part~2 parts, 0.1 part~2 parts of stabilizer and UV absorbers.
2. the antiseepage film according to claim 1 repaired for liner overturning, which is characterized in that polypropylene 10 parts~50
Part, 0.5 part~10 parts of polyethylene, 20 parts~70 parts of polyolefin elastomer, 0.1 part~1.5 parts of antioxidant, 0.1 part of stabilizer~
1.5 parts and 0.1 part~1.5 parts of UV absorbers.
3. the antiseepage film according to claim 1 repaired for liner overturning, which is characterized in that the polyolefin elastomer
For ethylene-octene copolymer.
4. the antiseepage film according to claim 1 repaired for liner overturning, which is characterized in that the polyethylene is high pressure
Polyethylene.
5. the antiseepage film according to any one of claims 1 to 4 repaired for liner overturning, which is characterized in that described
Antioxidant is antioxidant 1010, antioxidant CA, anti-oxidant DLTP, irgasfos 168, antioxidant TNP, antioxidant TPP and antioxidant
One or more of 264.
6. the antiseepage film according to any one of claims 1 to 4 repaired for liner overturning, which is characterized in that described
Stabilizer is one kind in organotin, zinc stearate, calcium stearate, stearic acid tin, phosphite ester, glyceride and epoxidized soybean oil
It is or several.
7. the antiseepage film according to any one of claims 1 to 4 repaired for liner overturning, which is characterized in that described
UV absorbers are 2- (2'- hydroxyl -5'- aminomethyl phenyls) benzotriazole, ESCALOL 567,2- hydroxyls
Base -4- oxy-octyl benzophenones, 4,4- thiobis (6- Butylated Hydroxytoluenes), 2- (bis- tertiary benzene of 2'- hydroxyls -3', 5'-
Base) in -5- chlorinations benzotriazole, single benzoic acid resorcinol and three (1,2,2,6,6- pempidines base) phosphite esters
One or more.
8. the antiseepage film according to any one of claims 1 to 4 repaired for liner overturning, which is characterized in that described
Antiseepage film is overlayed on by hot melt adhesive or lamination technique on the non-woven fabrics of liner overturning composite material.
9. a kind of preparation method of the antiseepage film such as according to any one of claims 1 to 8 repaired for liner overturning, including
Following steps：Polypropylene, polyethylene, polyolefin elastomer, antioxidant, stabilizer and UV absorbers are uniformly mixed, so
Afterwards using casting technique is squeezed out, temperature is controlled at 210 DEG C~330 DEG C, and the antiseepage film repaired for liner overturning is made.
It is 10. a kind of such as the preparation method of the antiseepage film according to any one of claims 1 to 8 repaired for liner overturning, bag
Include following steps：Polypropylene, polyethylene, polyolefin elastomer, antioxidant, stabilizer and UV absorbers are uniformly mixed,
Mixed material is obtained, using lamination technique, mixed material is directly drenched on non-woven fabrics, adjustment temperature is 220 DEG C~350 DEG C,
Lamination speed 10kg/h~100kg/h is made antiseepage film layer and overturns the antiseepage film repaired to get to for liner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711485091.2A CN108117695A (en) | 2017-12-29 | 2017-12-29 | A kind of antiseepage film repaired for liner overturning and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711485091.2A CN108117695A (en) | 2017-12-29 | 2017-12-29 | A kind of antiseepage film repaired for liner overturning and preparation method thereof |
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| CN108117695A true CN108117695A (en) | 2018-06-05 |
Family
ID=62230680
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711485091.2A Pending CN108117695A (en) | 2017-12-29 | 2017-12-29 | A kind of antiseepage film repaired for liner overturning and preparation method thereof |
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| CN (1) | CN108117695A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112626913A (en) * | 2020-11-24 | 2021-04-09 | 宁波华丰包装有限公司 | High resistant separates kraft paper complex film and composite equipment thereof |
| CN115286866A (en) * | 2022-08-04 | 2022-11-04 | 厦门安力克膜科技有限公司 | Elastic material, electrodialysis plate frame and electrodialysis partition plate |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112626913A (en) * | 2020-11-24 | 2021-04-09 | 宁波华丰包装有限公司 | High resistant separates kraft paper complex film and composite equipment thereof |
| CN115286866A (en) * | 2022-08-04 | 2022-11-04 | 厦门安力克膜科技有限公司 | Elastic material, electrodialysis plate frame and electrodialysis partition plate |
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