CN105419120B - It is a kind of can hot air welding construction vulcanization type EPDM rubber waterproof rolling material and its production technology - Google Patents
It is a kind of can hot air welding construction vulcanization type EPDM rubber waterproof rolling material and its production technology Download PDFInfo
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- CN105419120B CN105419120B CN201510959501.7A CN201510959501A CN105419120B CN 105419120 B CN105419120 B CN 105419120B CN 201510959501 A CN201510959501 A CN 201510959501A CN 105419120 B CN105419120 B CN 105419120B
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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
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/16—Elastomeric ethene-propene or ethene-propene-diene copolymers, e.g. EPR and EPDM rubbers
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- 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
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
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Abstract
The present invention provide it is a kind of can hot air welding construction vulcanization type EPDM rubber waterproof rolling material, the waterproof roll includes following raw material components：Ethylene propylene diene rubber, sulphur, zinc oxide, stearic acid, Vulcanization accelerator TMTD, accelerator SA, accelerant B Z, captax, filler, age resistor, softening agent.Each raw material components, in terms of mass parts, content is：98 ~ 102 parts of ethylene propylene diene rubber, 1.4 ~ 1.6 parts of sulphur, 4 ~ 6 parts of zinc oxide, 0.8 ~ 1.2 part of stearic acid, 0.8 ~ 1.1 part of Vulcanization accelerator TMTD, 1.6 ~ 2.2 parts of accelerator SA, 0.4 ~ 0.6 part of accelerant B Z, 0.4 ~ 0.6 part of captax, 38 ~ 42 parts of filler, 4 ~ 6 parts of age resistor, 15 ~ 25 parts of softening agent.EPDM rubber waterproof rolling material of the present invention can use hot air welding construction and gluing construction two ways.
Description
Technical field
The present invention relates to a kind of EPDM for building（EPDM）It is rubber water-proofing coiled, and in particular to one kind can hot air welding
The vulcanization type EPDM waterproof rolled sheet and its production technology of construction, belong to field of waterproof materials.
Background technology
EPDM rubber waterproof rolling material has that tensile strength is high, elongation percentage is big, ageing-resistant good, flexible to basic unit or ftracture
Deform the advantages that adaptable；But the characteristics of due to its own inner molecular structure, the ethylene propylene diene rubber waterproof after vulcanization
Coiled material loses hot air welding performance, is only capable of gluing construction.
The waterproof matrix of EPDM rubber waterproof rolling material requires firm, smooth, clean, dry.Basic unit's rotation angle position should
Circular arc or triangle are made, arc radius should be greater than 20mm.The drainage grade of roofing, partition seam, steam vent etc. should will by design
Ask processing.
Paving coiled material is unable in the case of rain, snow, mist, strong wind weather and basal plane humidity.During laying water-proof coiled material, construction temperature
Degree need to be at 5-35 DEG C, and relative humidity should be less than 80%.In work progress, each procedure must not intersect, and all position of joints are necessary
Do enhancement layer.Can not be close to burning things which may cause a fire disaster, thermal source during construction.
But became uneven, the water resistance of adhesive be poor during due to brushing adhesive, seam areas be bonded and sealed is not easy
Etc. reason, cause EPDM rubber waterproof rolling material layer because seam bond loosely or it is poorly sealed cause infiltration, leak thing
Therefore happen occasionally.
Existing vulcanization type EPDM rubber waterproof rolling material has following defect：（1）Its overlapping the slot can not hot air welding
Construction；（2）Shear strength is poor；（3）The coiled material peel strength of gluing construction is poor；（4）Lap-joint's poor water resistance, easily infiltration leakage
Water；
Thus, be badly in need of a kind of every good mechanical property can hot air welding construction vulcanization type ethylene propylene diene rubber waterproof volume
Material.
The content of the invention
The present invention for solve the shortcomings of the prior art, there is provided it is a kind of can hot air welding construction vulcanization type EPDM
Rubber water-proofing coiled and its production technology, to realize following goal of the invention：
1st, solve the problems, such as that the overlapping the slot of vulcanization type EPDM rubber waterproof rolling material can not hot air welding construction；
2nd, the shear strength of vulcanization type EPDM rubber waterproof rolling material is improved；
3rd, the peel strength of vulcanization type EPDM rubber waterproof rolling material is improved；
4th, the water resistance of vulcanization type EPDM rubber waterproof rolling material is improved.
In order to solve the above technical problems, using following technical scheme：
It is a kind of can hot air welding construction vulcanization type EPDM rubber waterproof rolling material,
The waterproof roll includes following raw material components：Ethylene propylene diene rubber, sulphur, zinc oxide, stearic acid, accelerator
TMTD, accelerator SA, accelerant B Z, captax, filler, age resistor, softening agent.
It is the further improvement to above-mentioned technical proposal below：
Each raw material components of the waterproof roll, in terms of mass parts, content is：98 ~ 102 parts of ethylene propylene diene rubber, sulphur
1.4 ~ 1.6 parts, 4 ~ 6 parts of zinc oxide, 0.8 ~ 1.2 part of stearic acid, 0.8 ~ 1.1 part of Vulcanization accelerator TMTD, accelerator SA 1.6 ~ 2.2
Part, 0.4 ~ 0.6 part of accelerant B Z, 0.4 ~ 0.6 part of captax, 38 ~ 42 parts of filler, 4 ~ 6 parts of age resistor, softening agent 15 ~
25 parts.
Each raw material components of the waterproof roll, in terms of mass parts, content is：100 parts of ethylene propylene diene rubber, sulphur
1.5 parts, 5 parts of zinc oxide, 1 part of stearic acid, 1.0 parts of Vulcanization accelerator TMTD, 2 parts of accelerator SA, 0.5 part of accelerant B Z, promote
0.5 part of agent M, 40 parts of filler, 5 parts of age resistor, 20 parts of softening agent.
The filler is carbon black, the carbon black：With N330 carbon blacks and N660 carbon blacks in mass ratio 1:1 mixes.
The ethylene propylene diene rubber is LG-DOW EPDM 4770；
The sulphur fineness is 400 mesh；
The age resistor is rubber antioxidant, model 4010Na；
The softening agent is paraffin oil.
It is a kind of can hot air welding vulcanization type EPDM rubber waterproof rolling material production technology,
Including banburying, it is kneaded, extrusion molding, covers welding bar, vulcanization, cool down, batch step.
Described banburying：Mixing temperature is controlled 130 ~ 145oC, mixing time are 10 ~ 12min, banburying back glue.
Described mixing：Thin logical 3 times in 560 type mills, cooling, temperature is less than 90oAfter C, filtering；Lower bar width control
System is in 10 ~ 12cm, thickness control in 1 ~ 1.5cm.
Described covers welding bar, vulcanization：Solder paste strip hot melt is fixed at 5 ~ 10cm of waterproof roll edge, vulcanized, sulphur
Change the control of tank curing temperature 160 ~ 180oC, sulfide stress control are controlled in 8 ~ 9min in 0.3MPa, cure time.
Described extrusion molding：The cold feed extruder extruder barrel temperature control of extrusion molding is 45 ~ 75oC。
Compared with prior art, the beneficial effects of the invention are as follows：
1. EPDM rubber waterproof rolling material of the present invention can use hot air welding construction and gluing construction two ways；It is general
Logical vulcanization type EPDM rubber waterproof rolling material does not possess solderable connection function completely, is only capable of gluing construction；
2. coiled material lapping side of the present invention can by hot-air welding machine welding procedure, the peel strength of soldered up to 7.3 ~
7.8N/mm, and the gluing peel strength of existing vulcanizable rubber waterproof roll is only 1.5N/mm, weld strength and welding matter
Amount is far more than plybonding effect；
3. the shearing strength of EPDM rubber waterproof rolling material overlap edge of the present invention after weld formation is up to 10.3 ~ 12N/min,
The remote gluing shearing strength for being more than prior art, and the external force resistance damage capability at soldered has exceeded coiled material anti-outer in itself
Power damage capability；
4. EPDM rubber waterproof rolling material of the present invention：Water-resistant capacity is strong, and leak incidence is 0；
5. EPDM rubber waterproof rolling material of the present invention：Transverse tensile strength is 11.5 ~ 12.5MPa, and transverse breakage extends
Rate is 660 ~ 668%, and longitudinal tensile strength is 12.3 ~ 12.9MPa, and longitudinal elongation at break rate is 512 ~ 516%, cross direction tear strength
For 31 ~ 35N/mm, machine direction tear is 37 ~ 39N/mm, and peel strength is 7.3 ~ 7.8N/mm, shearing strength is 10.3 ~
12N/mm。
Embodiment
Embodiment 1 it is a kind of can hot air welding construction vulcanization type EPDM rubber waterproof rolling material
The coiled material includes following raw material, in terms of mass parts：
Raw material quality part
98 parts of ethylene propylene diene rubber
1.4 parts of sulphur
4 parts of zinc oxide
0.8 part of stearic acid
0.8 part of Vulcanization accelerator TMTD
Accelerator SA 1.6 part
0.4 part of accelerant B Z
0.4 part of captax
38 parts of filler
4 parts of age resistor
15 parts of softening agent；
The ethylene propylene diene rubber is LG-DOW EPDM 4770；
The sulphur is vulcanizing agent, and the requirement of its mesh number is 400 mesh；
The zinc oxide is nano zine oxide, the vulcanizing activator as EPDM rubber；
For the stearic acid as EPDM rubber vulcanizing activator, the requirement of its mesh number is 800 mesh, the purpose is to zinc oxide simultaneously
With cure activation agent, EPDM sizing material crosslink densities are improved；
The Vulcanization accelerator TMTD, SA, BZ, M be vulcanization accelerator；
The filler is carbon black, with N330 carbon blacks and N660 carbon blacks in mass ratio 1:1 mixes；
The age resistor is rubber antioxidant, its model 4010Na；
The softening agent is paraffin oil.
Embodiment 2 it is a kind of can hot air welding construction vulcanization type EPDM rubber waterproof rolling material
The coiled material includes following raw material, in terms of mass parts：
Raw material quality part
100 parts of ethylene propylene diene rubber
1.5 parts of sulphur
5 parts of zinc oxide
1 part of stearic acid
1.0 parts of Vulcanization accelerator TMTD
Accelerator SA 2 parts
0.5 part of accelerant B Z
0.5 part of captax
40 parts of filler
5 parts of age resistor
20 parts of softening agent；
The ethylene propylene diene rubber is LG-DOW EPDM 4770；
The sulphur is vulcanizing agent, and the requirement of its mesh number is 400 mesh；
The zinc oxide is nano zine oxide, the vulcanizing activator as EPDM rubber；
For the stearic acid as EPDM rubber vulcanizing activator, the requirement of its mesh number is 800 mesh, the purpose is to zinc oxide simultaneously
With cure activation agent, EPDM sizing material crosslink densities are improved；
The Vulcanization accelerator TMTD, SA, BZ, M be vulcanization accelerator；
The filler is carbon black, with N330 carbon blacks and N660 carbon blacks in mass ratio 1:1 mixes；
The age resistor is rubber antioxidant, its model 4010Na；
The softening agent is paraffin oil.
Embodiment 3 it is a kind of can hot air welding construction vulcanization type EPDM rubber waterproof rolling material
The coiled material includes following raw material, in terms of mass parts：
Raw material quality part
102 parts of ethylene propylene diene rubber
1.6 parts of sulphur
6 parts of zinc oxide
1.2 parts of stearic acid
1.1 parts of Vulcanization accelerator TMTD
Accelerator SA 2.2 part
0.6 part of accelerant B Z
0.6 part of captax
42 parts of filler
6 parts of age resistor
25 parts of softening agent；
The ethylene propylene diene rubber is LG-DOW EPDM 4770；
The sulphur is vulcanizing agent, and the requirement of its mesh number is 400 mesh；
The zinc oxide is nano zine oxide, the vulcanizing activator as EPDM rubber；
For the stearic acid as EPDM rubber vulcanizing activator, the requirement of its mesh number is 800 mesh, the purpose is to zinc oxide simultaneously
With cure activation agent, EPDM sizing material crosslink densities are improved；
The Vulcanization accelerator TMTD, SA, BZ, M be vulcanization accelerator；
The filler is carbon black, with N330 carbon blacks and N660 carbon blacks in mass ratio 1:1 mixes；
The age resistor is rubber antioxidant, its model 4010Na；
The softening agent is paraffin oil.
Embodiment 4 it is a kind of can hot air welding vulcanization type EPDM rubber waterproof rolling material production technology
Step 1, banburying：
EPDM, stearic acid, zinc oxide, filler, paraffin oil and age resistor are weighed by formula rate, put into banbury,
Mixing temperature is controlled 130 ~ 145oC, mixing time are 10 ~ 12min, treat the uniform back glue of banburying.
Step 2, it is kneaded：
By the sizing material of discharge in 560 type mills it is thin logical 3 times, sizing material is cooled, temperature is less than 90oAfter C, by filter glue
Machine filters decontamination；
Deimpurity sizing material will be filtered thin logical, mixing is carried out in 450 type mills, sulphur and promotion are added in mixing process
Agent TMTD, SA, BZ, M, lower bar after being kneaded uniformly, control 10 ~ 12cm is wide, 1 ~ 1.5cm is thick, place 24 hours.
Step 3, extrusion molding：
By cold feed extruder extrusion molding, cold feed extruder extruder barrel temperature control is 45 ~ 75oC。
Step 4, cover welding bar, vulcanization：
Solderable adhesive tape is heated, is fixed at 5 ~ 10cm of EPDM rubber waterproof rolling material edge, is entered with transmission cloth
Vulcanizing tank is vulcanized, and vulcanization parameters are characterised by：Sulfurizing pot vulcanization temperature control is 160 ~ 180oC, sulfide stress control
System is controlled in 8 ~ 9min in 0.3MPa, cure time.
Step 5, cool down, batch：
Coiled material after having vulcanized is through cooling down water cooling, then through batching, packing, being put in storage.
Vulcanization type EPDM rubber waterproof rolling material of the present invention, with conventional vulcanization type EPDM rubber waterproof rolling material phase
Than having the advantage that：
1. conventional vulcanization type EPDM rubber waterproof rolling material does not possess weldability completely, gluing construction, this hair are only capable of
Bright EPDM rubber waterproof rolling material can use hot air welding construction and gluing construction two ways；
2. coiled material lapping side of the present invention can be by hot-air welding machine welding procedure, the peel strength of soldered is up to 7 ~ 8N/
Mm, and the gluing peel strength of existing vulcanizable rubber waterproof roll is only 1.5N/mm, weld strength and welding quality are far super
In plybonding effect；
3. the shearing strength of EPDM rubber waterproof rolling material overlap edge of the present invention after weld formation is up to 10.3 ~ 12N/min,
The remote gluing shearing strength for being more than prior art, and the external force resistance damage capability at soldered has exceeded coiled material anti-outer in itself
Power damage capability；
4. through experiment, in different location, EPDM rubber waterproof rolling material overlap edge of the present invention is constructed after weld formation, altogether
Experiment at 100 is carried out, is detected after 12 months, nowhere coiled material has drainage；
5. the mechanical performance index testing result of pair EPDM rubber waterproof rolling material of the present invention is shown in Table 1；
The mechanical performance index testing result of 1 EPDM rubber waterproof rolling material of the present invention of table
As shown in Table 1, the mechanical performance of EPDM rubber waterproof rolling material of the present invention is substantially better than prior art.
Embodiment 5 it is a kind of can hot air welding vulcanization type EPDM rubber waterproof rolling material
The coiled material includes following raw material, in terms of mass parts：
Raw material quality part
109 parts of ethylene propylene diene rubber
1.1 parts of sulphur
4.6 parts of zinc oxide
3.1 parts of haze tallow
1.1 parts of Vulcanization accelerator TMTD
2.2 parts of accelerator SA
N- phenyl-α -4.6 parts of aniline
2.6 parts of ferrous sulfate
23 parts of magnesia-chrome sand
3.5 parts of polymethyl methacrylate
2.3 parts of evening primrose oil
1.2 parts of laurene；
The ethylene propylene diene rubber is LG-DOW EPDM 4770；
The sulphur is vulcanizing agent, and the requirement of its mesh number is 400 mesh；
The haze tallow：Fusing point is 48 DEG C -52 DEG C；Oil content is 2%；
The magnesia-chrome sand：Density is 4.429g/cm3,2180 DEG C of fusing point, Mohs' hardness 5.5；
The evening primrose oil：Relative density is 0.9210 ~ 0.9350, insoluble impurities≤0.05%, saponification number 190mg/
g~198mg/g；
The laurene：(20 DEG C) of proportion is 0.790 ~ 0.805, and (20 DEG C) of index of refraction is 1.4670 ~ 1.4740；
Above-mentioned percentage is mass percent.
The production technology of the waterproof roll：
Step 1, banburying：
By ethylene propylene diene rubber, haze tallow, zinc oxide, magnesia-chrome sand, ferrous sulfate, polymethyl methacrylate and N- phenyl-
α-aniline, is weighed by formula rate, is put into banbury, and mixing temperature is controlled 140oC, mixing time 11min, treats banburying
Uniform back glue.
Step 2, it is kneaded：
By the sizing material of discharge in 560 type mills it is thin logical 3 times, sizing material is cooled, temperature is less than 90oAfter C, by filter glue
Machine filters decontamination；
Deimpurity sizing material will be filtered thin logical, mixing is carried out in 450 type mills, and added sulphur in mixing process, promote
Agent TMTD, accelerator SA, see moon grass oil and laurene, lower bar after being kneaded uniformly, control 10 ~ 12cm is wide, 1 ~ 1.5cm is thick, put
Put 24 hours.
Step 3, extrusion molding：
By cold feed extruder extrusion molding, cold feed extruder extruder barrel temperature control is 45 ~ 75oC。
Step 4, cover welding bar, vulcanization：
Solderable adhesive tape is heated, is fixed at 5 ~ 10cm of EPDM rubber waterproof rolling material edge, is entered with transmission cloth
Vulcanizing tank is vulcanized, and vulcanization parameters are characterised by：Sulfurizing pot vulcanization temperature control is 160 ~ 180oC, sulfide stress control
System is controlled in 8 ~ 9min in 0.3MPa, cure time.
Step 5, cool down, batch：
Coiled material after having vulcanized is through cooling down water cooling, then through batching, packing, being put in storage.
Through experiment, the EPDM rubber waterproof rolling material of embodiment 5 can use hot air welding construction and gluing two kinds of construction
Mode；
Coiled material lapping side can be by hot-air welding machine welding procedure, and the peel strength of soldered is up to 7.9N/mm；
The shearing strength of coiled material lapping side after weld formation is up to 13N/min；
Coiled material water-resistant capacity is strong, and leak incidence is 0；
Coiled material transverse tensile strength is 14MPa, and transverse breakage elongation is 680%, longitudinal tensile strength 14MPa, longitudinal direction
Elongation at break is 520%, cross direction tear strength 40N/mm, machine direction tear 42N/mm, peel strength 7.9N/
Mm, shearing strength 13N/mm.
Finally it should be noted that：The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention,
Although the present invention is described in detail with reference to the foregoing embodiments, for those skilled in the art, it still can be with
Technical scheme described in foregoing embodiments is modified, or equivalent substitution is carried out to which part technical characteristic.It is all
Within the spirit and principles in the present invention, any modification, equivalent substitution and improvements made etc., it should be included in the guarantor of the present invention
Within the scope of shield.Citing described above for best mode for carrying out the invention, wherein the part do not addressed in detail is this area
The common knowledge of those of ordinary skill；Protection scope of the present invention is defined by the content of claim, any based on the present invention's
Technical inspiration and the equivalent transformation carried out, also within protection scope of the present invention.
Claims (2)
1. it is a kind of can hot air welding construction vulcanization type EPDM rubber waterproof rolling material, it is characterised in that：
The waterproof roll includes following raw material components：Ethylene propylene diene rubber, sulphur, zinc oxide, stearic acid, Vulcanization accelerator TMTD,
Accelerator SA, accelerant B Z, captax, filler, age resistor, softening agent；
Each raw material components of the waterproof roll, in terms of mass parts, content is：98 ~ 102 parts of ethylene propylene diene rubber, sulphur 1.4
~ 1.6 parts, 4 ~ 6 parts of zinc oxide, 0.8 ~ 1.2 part of stearic acid, 0.8 ~ 1.1 part of Vulcanization accelerator TMTD, 1.6 ~ 2.2 parts of accelerator SA,
0.4 ~ 0.6 part of accelerant B Z, 0.4 ~ 0.6 part of captax, 38 ~ 42 parts of filler, 4 ~ 6 parts of age resistor, softening agent 15 ~ 25
Part；
The filler is carbon black, the carbon black：With N330 carbon blacks and N660 carbon blacks in mass ratio 1:1 mixes；
The ethylene propylene diene rubber is LG-DOW EPDM 4770；
The sulphur fineness is 400 mesh；
The age resistor is rubber antioxidant, model 4010Na；
The softening agent is paraffin oil；
The coiled material lapping side is constructed by hot air welding, and the peel strength of overlap edge is up to 7.3 ~ 7.8N/mm, shearing strength
10.3~12N/mm；
It is described it is a kind of can hot air welding vulcanization type EPDM rubber waterproof rolling material production technology, including banburying is kneaded,
Extrusion molding, welding bar, vulcanization are covered, cools down, batch step；
Described banburying：Mixing temperature is controlled 130 ~ 145oC, mixing time are 10 ~ 12min, banburying back glue；
Described mixing：Thin logical 3 times in 560 type mills, cooling, temperature is less than 90oAfter C, filtering；Lower bar width control system exists
10 ~ 12cm, thickness control are in 1 ~ 1.5cm；
Described covers welding bar, vulcanization：Solder paste strip hot melt is fixed at 5 ~ 10cm of waterproof roll edge, vulcanized, vulcanizing tank
Curing temperature is controlled 160 ~ 180oC, sulfide stress control are controlled in 8 ~ 9min in 0.2 ~ 0.4MPa, cure time；
Described extrusion molding：The cold feed extruder extruder barrel temperature control of extrusion molding is 45 ~ 75oC。
2. it is according to claim 1 it is a kind of can hot air welding construction vulcanization type EPDM rubber waterproof rolling material, it is special
Sign is：
Each raw material components of the waterproof roll, in terms of mass parts, content is：100 parts of ethylene propylene diene rubber, 1.5 parts of sulphur,
5 parts of zinc oxide, 1 part of stearic acid, 1.0 parts of Vulcanization accelerator TMTD, 2 parts of accelerator SA, 0.5 part of accelerant B Z, captax
0.5 part, 40 parts of filler, 5 parts of age resistor, 20 parts of softening agent.
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| CN110964448B (en) * | 2019-12-12 | 2021-04-02 | 上海豫宏（金湖）防水科技有限公司 | Reactive ethylene propylene diene monomer butyl self-adhesive waterproof coiled material and preparation method thereof |
| CN113789014B (en) * | 2021-09-07 | 2023-09-15 | 建国伟业防水科技望都有限公司 | Weldable ethylene propylene diene monomer waterproof coiled material and preparation method thereof |
| CN116622165B (en) * | 2023-06-13 | 2024-02-23 | 昆山科顺防水材料有限公司 | Composite waterproof heat-insulating coiled material and preparation method and application thereof |
| CN117511235A (en) * | 2023-11-28 | 2024-02-06 | 苏州风载材料科技有限公司 | Heat-insulating composite waterproof coiled material and preparation method thereof |
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| CN103554678B (en) * | 2013-09-30 | 2015-09-30 | 潍坊市宏源防水材料有限公司 | A kind of gluing EPDM rubber waterproof rolling material |
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Application publication date: 20160323 Assignee: Sichuan Hongyuan Waterproof Project Co., Ltd. Assignor: Weifang Hongyuan Waterproof Material Co., Ltd. Contract record no.: 2018370000039 Denomination of invention: Vulcanized ethylene propylene diene monomer waterproof roll capable of being subjected to hot-air welding construction and production process of vulcanized ethylene propylene diene monomer waterproof roll Granted publication date: 20180403 License type: Common License Record date: 20180918 |
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