CN107351464A - A kind of shockproof waterproof roll and preparation method - Google Patents

A kind of shockproof waterproof roll and preparation method Download PDF

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Publication number
CN107351464A
CN107351464A CN201710575921.4A CN201710575921A CN107351464A CN 107351464 A CN107351464 A CN 107351464A CN 201710575921 A CN201710575921 A CN 201710575921A CN 107351464 A CN107351464 A CN 107351464A
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China
Prior art keywords
layer
waterproof
waterproof roll
shockproof
self
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CN201710575921.4A
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Chinese (zh)
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不公告发明人
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Hefei's New Materials Co Ltd V
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Hefei's New Materials Co Ltd V
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Priority to CN201710575921.4A priority Critical patent/CN107351464A/en
Publication of CN107351464A publication Critical patent/CN107351464A/en
Pending legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B25/00—Layered products comprising a layer of natural or synthetic rubber
    • B32B25/04—Layered products comprising a layer of natural or synthetic rubber comprising rubber as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B25/08—Layered products comprising a layer of natural or synthetic rubber comprising rubber as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B25/00—Layered products comprising a layer of natural or synthetic rubber
    • B32B25/12—Layered products comprising a layer of natural or synthetic rubber comprising natural rubber
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/12—Layered products comprising a layer of synthetic resin next to a fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B32B27/306—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising vinyl acetate or vinyl alcohol (co)polymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/10—Inorganic fibres
    • B32B2262/101—Glass fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/56—Damping, energy absorption
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/714—Inert, i.e. inert to chemical degradation, corrosion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/726—Permeability to liquids, absorption
    • B32B2307/7265—Non-permeable

Landscapes

  • Laminated Bodies (AREA)

Abstract

The invention discloses a kind of shockproof waterproof roll and preparation method, belong to waterproof roll technical field.The shockproof waterproof roll, including substrate layer, substrate layer upper surface are provided with elastic cord breaker, and elastic cord breaker upper surface is provided with toughness waterproof layer, wherein, elastic cord breaker and the substrate layer and it is connected between toughness waterproof layer by tack coat；The substrate layer lower surface is provided with self-adhesion waterproof layer, and self-adhesion waterproof layer lower surface is additionally provided with protective layer.Preparation method includes：Tack coat is coated in substrate layer upper surface, elastic cord breaker is bonded in binding agent upper surface；Again toughness waterproof layer is bonded in the upper surface of elastic cord breaker；Self-adhesion waterproof layer is coated in substrate layer lower surface, then bonds protective layer, you can.The waterproof roll not only has preferable waterproof effect, also with excellent shockproof effect, can protect and build the damage that is not impacted, and the preparation method is simple and easy, has preferable application value.

Description

A kind of shockproof waterproof roll and preparation method
Technical field
The present invention relates to waterproof roll technical field, and in particular to a kind of shockproof waterproof roll and preparation method.
Background technology
Waterproof material is widely used in various industry and roofing, the engineering waterproofings of basement of civil buildings, and subway, In the engineering waterproofing of the municipal administration such as tunnel, highway bridge and water conservancy projects, current waterproof roll collapse resistance power is poor, easily punctures Or tear phenomenon, need labor intensive, material resources to be repaired, shorten the service life of waterproof material, cause resource and fund Waste.
And currently used waterproof roll is modified pitch of high polymer, according to the place of waterproof roll application not With, it is necessary to the property certain to waterproof roll, such as in coastal area and high salinity area, because by saline and alkaline erosion, build The waterproofing work for building thing requires higher than in general building waterproof standard, especially requires that waterproof material will have excellent Salt And Alkali Tolerance Corrosive nature and resistance of chloride ion penetration, good water resistance can be still kept in high salinity environment for a long time, can supported High temperature resistance and severe cold.In addition, the requirement for the shockproof effect of waterproof roll is gradually presented in face of people, as people live The raising of quality, people require more and more higher to the perfect degree of building, but can not in building course or life process What is avoided has some and collides with, and will certainly have certain threat to the integrality of the waterproof roll laid, it is therefore desirable to anti- Water coiled material has certain antihunt action, ensures the waterproof effect of waterproof roll and is not influenceed by impact failure, and existing report The not research to waterproof roll shockproof effect in road.
Therefore, research and development one kind both has preferable waterproof effect, again anti-with preferable high tenacity shockproof effect Water coiled material turns into the emphasis studied at present, it may have preferable application prospect and use value.
The content of the invention
For in the prior art the defects of, it is an object of the invention to provide a kind of shockproof waterproof roll and preparation method, institute Stating shockproof waterproof roll not only has preferable waterproof effect, also with excellent shockproof effect, can avoid because of collision or The breakage or failure of waterproof roll caused by shock, the damage that is not impacted is built in further protection, in addition, the preparation method It is simple and easy, there is preferable application value.
The present invention solves technical problem and adopted the following technical scheme that：
The present invention relates to a kind of shockproof waterproof roll, including substrate layer, the substrate layer upper surface is provided with elastic cord breaker, described Elastic cord breaker upper surface is provided with toughness waterproof layer, wherein, between the elastic cord breaker and the substrate layer and elasticity is slow Rush between layer and toughness waterproof layer and connected by tack coat；The substrate layer lower surface is provided with self-adhesion waterproof layer, the self-adhesion Waterproof layer lower surface is additionally provided with protective layer.
Preferably, the substrate layer is glass carpet veneer, can strengthen the intensity of waterproof roll.
Preferably, the elastic cord breaker is EVA foam layer, has light and preferable elasticity, can greatly improve anti- The shockproof effect of water coiled material.
Preferably, the toughness waterproof layer is graphene modified natural rubber nanometer composite layer, in the work of graphene The high-elastic and high tenacity of natural rubber is not only optimized under, also causes modified natural rubber that there is preferable water-tight corrosion-proof Effect, and then ensure that the waterproof effect of waterproof roll.
Preferably, the self-adhesion waterproof layer is self-adhesion SBS modified asphalt layers, easy for construction, good water-proof effect.
Preferably, the tack coat is graphene modified EVA foam glue layer, and the modifying function of graphene not only strengthens The adhesive property of eva foam glue, also cause tack coat that there is preferable waterproof corrosion function.
Preferably, the protective layer is PE layers.
The invention further relates to a kind of preparation method of shockproof waterproof roll, comprise the following steps：On Chopped Strand Mat substrate layer Surface coats a layer graphene modified EVA foam glue tack coat, then bonds EVA foam layer, foam in tack coat upper surface The thickness of layer is 0.5 ~ 2mm；Again in the graphene coated modified EVA foam glue tack coat in the upper surface of EVA foam layer, Ran Houzai Graphene modified natural rubber layer is bonded in tack coat upper surface, modified natural rubber thickness degree is 0.6 ~ 0.8mm；In Chopped Strand Mat The lower surface coating self-adhesion SBS modified asphalt layers of layer, asphalt thickness are 0.4 ~ 0.6mm, and glued on another surface of bitumen layer PE diaphragms are tied, produce the shockproof waterproof roll.
Compared with prior art, the present invention has following beneficial effect：
（1）Shockproof waterproof roll of the present invention, using EVA foam layer as elastic cord breaker, because EVA foam layer has Preferable cushioning buffer effect, along with eva foam has the characteristics of light, it is applied to waterproof roll, can not only increases Add the cushioning buffer effect of waterproof roll, difficult caused by the high weight of waterproof roll can also be avoided, enhance waterproof volume The human oriented design of material.
（2）The present invention uses graphene modified natural rubber nano composite material as toughness waterproof layer, due to graphene With lamella conjugated structure, it is layering to form the anticorrosive coat of densification, can effectively suppresses infiltration and infiltration of the water to film, with Natural rubber modification application substantially increases waterproof, the antiseptic effect of waterproof roll in waterproof roll；Further, since graphene Excellent mechanical property and chemical stability so that modified natural rubber has preferable toughness and environmental stability.
（3）Adhesive layer uses graphene modified EVA foam glue layer, due to the unique texture of graphene so that modified Eva foam glue not only there is stronger being firmly bonded property, strengthen the being firmly bonded property between each layer of diaphragm, avoid because Loosely caused tilting, degumming phenomenon are bonded, is provided safeguard for the long-acting use of waterproof roll.Further, since graphene is deposited Also causing tack coat that there is preferable anti-water erosion, provided safeguard for the waterproof effect of waterproof roll.
（4）In summary, shockproof waterproof roll of the present invention have preferable elastic buffer act on and high tenacity and Excellent water-tight corrosion-proof effect, meet existing market demand, and the preparation method is simple, it is easy to operate, preferably should have Use prospect.
Brief description of the drawings
The detailed description made by reading with reference to the following drawings to non-limiting example, further feature of the invention, Objects and advantages will become more apparent upon：
Fig. 1 is the structural representation of shockproof waterproof roll of the present invention；
In figure mark for：1st, substrate layer, 2, elastic cord breaker, 3, toughness waterproof layer, 4, tack coat, 5, self-adhesion waterproof layer, 6, protect Sheath.
Embodiment
With reference to specific embodiment, the present invention is expanded on further.These embodiments are merely to illustrate the present invention and not had to In limitation the scope of the present invention.In the description of the invention, it is necessary to illustrate, unless otherwise clearly defined and limited, art Language " installation ", " being provided with ", " connection " should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or It is integrally connected；Can be mechanical connection or electrical connection；Can be joined directly together, can also be by between intermediary Connect connected, can be the connection of two element internals.For the ordinary skill in the art, can be understood with concrete condition The concrete meaning of above-mentioned term in the present invention.
Embodiment 1：
As shown in figure 1, a kind of shockproof waterproof roll and preparation method of the preferred embodiment of the present invention；
The shockproof waterproof roll, including substrate layer 1, the upper surface of substrate layer 1 are provided with elastic cord breaker 2, and the elasticity is slow Rush the upper surface of layer 2 and be provided with toughness waterproof layer 3, wherein, between the elastic cord breaker 2 and the substrate layer 1 and elastic buffer Connected between layer 2 and toughness waterproof layer 3 by tack coat 4；The lower surface of substrate layer 1 is provided with self-adhesion waterproof layer 5, it is described from The viscous lower surface of waterproof layer 5 is additionally provided with protective layer 6.
Wherein, the substrate layer 1 is glass carpet veneer, can strengthen the intensity of waterproof roll；The elastic cord breaker 2 is EVA foam layer, there is light and preferable elasticity, the shockproof effect of waterproof roll can be greatly improved；The toughness waterproof layer 3 For graphene modified natural rubber nanometer composite layer, not only optimized in the presence of graphene the high-elastic of natural rubber and High tenacity, also cause modified natural rubber that there is preferable water-tight corrosion-proof effect, and then ensure that the waterproof of waterproof roll Effect；The self-adhesion waterproof layer 5 is self-adhesion SBS modified asphalt layers, easy for construction, good water-proof effect；The tack coat 4 is graphite Alkene modified EVA foam glue layer, the modifying function of graphene not only strengthen the adhesive property of eva foam glue, also cause viscous Knot layer has preferable waterproof corrosion function；The protective layer 6 is PE layers.
The preparation method of shockproof waterproof roll of the present invention, comprises the following steps：Applied in Chopped Strand Mat substrate layer upper surface A layer graphene modified EVA foam glue tack coat is covered, then bonds EVA foam layer, the thickness of froth bed in tack coat upper surface Spend for 1.2 mm；Again in the graphene coated modified EVA foam glue tack coat in the upper surface of EVA foam layer, then again in bonding Layer upper surface bonds graphene modified natural rubber layer, and modified natural rubber thickness degree is 0.6 mm；In the following table of glass carpet veneer Face coats self-adhesion SBS modified asphalt layers, and asphalt thickness is 0.5 mm, and bonds PE diaphragms on another surface of bitumen layer, Produce the shockproof waterproof roll.
Embodiment 2：
A kind of shockproof waterproof roll and preparation method of the preferred embodiment of the present invention；
The shockproof waterproof roll, including substrate layer, the substrate layer upper surface are provided with elastic cord breaker, the elastic cord breaker Upper surface is provided with toughness waterproof layer, wherein, between the elastic cord breaker and the substrate layer and elastic cord breaker and toughness Connected between waterproof layer by tack coat；The substrate layer lower surface is provided with self-adhesion waterproof layer, the self-adhesion waterproof layer following table Face is additionally provided with protective layer.
Wherein, the substrate layer is glass carpet veneer, can strengthen the intensity of waterproof roll；The elastic cord breaker is EVA Froth bed, there is light and preferable elasticity, the shockproof effect of waterproof roll can be greatly improved；The toughness waterproof layer is stone Black alkene modified natural rubber nanometer composite layer, the high-elastic and high-ductility of natural rubber is not only optimized in the presence of graphene Property, also cause modified natural rubber that there is preferable water-tight corrosion-proof effect, and then ensure that the waterproof effect of waterproof roll； The self-adhesion waterproof layer is self-adhesion SBS modified asphalt layers, easy for construction, good water-proof effect；The tack coat is modified for graphene Eva foam glue layer, the modifying function of graphene not only strengthen the adhesive property of eva foam glue, also cause tack coat tool There is preferable waterproof corrosion function；The protective layer is PE layers.
The preparation method of shockproof waterproof roll of the present invention, comprises the following steps：Applied in Chopped Strand Mat substrate layer upper surface A layer graphene modified EVA foam glue tack coat is covered, then bonds EVA foam layer, the thickness of froth bed in tack coat upper surface Spend for 0.5 mm；Again in the graphene coated modified EVA foam glue tack coat in the upper surface of EVA foam layer, then again in bonding Layer upper surface bonds graphene modified natural rubber layer, and modified natural rubber thickness degree is 0.8 mm；In the following table of glass carpet veneer Face coats self-adhesion SBS modified asphalt layers, and asphalt thickness is 0.6 mm, and bonds PE diaphragms on another surface of bitumen layer, Produce the shockproof waterproof roll.
Embodiment 3：
The structure of the shockproof waterproof roll is same as Example 1, the difference is that the preparation method of shockproof waterproof roll：In glass Felt substrate layer upper surface coats a layer graphene modified EVA foam glue tack coat, and EVA bubbles are then bonded in tack coat upper surface Foam layer, the thickness of froth bed is 2 mm；Again in the graphene coated modified EVA foam glue tack coat in the upper surface of EVA foam layer, Then graphene modified natural rubber layer is bonded in tack coat upper surface again, modified natural rubber thickness degree is 0.6 mm；In glass The lower surface coating self-adhesion SBS modified asphalt layers of fine carpet veneer, asphalt thickness is 0.4 mm, and is glued on another surface of bitumen layer PE diaphragms are tied, produce the shockproof waterproof roll.
In summary, shockproof waterproof roll of the present invention not only has preferable waterproof effect, also prevents with excellent Shake effect and high tenacity, can avoid because collide either hit caused by waterproof roll breakage or failure, further protection The damage that is not impacted is built, guarantee is provided with the integrality of waterproof roll and waterproof effect to build, meeting existing market needs Ask, there is preferable application prospect.In addition, the preparation method of the waterproof roll is simple and easy, there is preferable application value.
The specific embodiment of the present invention is described above.It is to be appreciated that the invention is not limited in above-mentioned Particular implementation, those skilled in the art can make various deformations or amendments within the scope of the claims, this not shadow Ring the substantive content of the present invention.

Claims (8)

  1. A kind of 1. shockproof waterproof roll, it is characterised in that：Including substrate layer, the substrate layer upper surface is provided with elastic cord breaker, The elastic cord breaker upper surface is provided with toughness waterproof layer, wherein, between the elastic cord breaker and the substrate layer and bullet Connected between property cushion and toughness waterproof layer by tack coat；The substrate layer lower surface is provided with self-adhesion waterproof layer, described Self-adhesion waterproof layer lower surface is additionally provided with protective layer.
  2. 2. shockproof waterproof roll according to claim 1, it is characterised in that：The substrate layer is glass carpet veneer.
  3. 3. shockproof waterproof roll according to claim 1, it is characterised in that：The elastic cord breaker is EVA foam layer.
  4. 4. shockproof waterproof roll according to claim 1, it is characterised in that：The toughness waterproof layer is that graphene is modified day T PNR nanometer composite layer.
  5. 5. shockproof waterproof roll according to claim 1, it is characterised in that：The self-adhesion waterproof layer is modified for self-adhesion SBS Bitumen layer.
  6. 6. shockproof waterproof roll according to claim 1, it is characterised in that：The tack coat steeps for graphene modified EVA Foam glue layer.
  7. 7. shockproof waterproof roll according to claim 1, it is characterised in that：The protective layer is PE layers.
  8. A kind of 8. preparation method of shockproof waterproof roll according to any one of claim 1 ~ 7, it is characterised in that：Including such as Lower step：A layer graphene modified EVA foam glue tack coat is coated in Chopped Strand Mat substrate layer upper surface, then on tack coat Surface bonds EVA foam layer, and the thickness of froth bed is 0.5 ~ 2mm；Again in the graphene coated modification in the upper surface of EVA foam layer Eva foam glue bonding layer, then bond graphene modified natural rubber layer, modified natural rubber layer in tack coat upper surface again Thickness is 0.6 ~ 0.8mm；Glass carpet veneer lower surface coat self-adhesion SBS modified asphalt layers, asphalt thickness be 0.4 ~ 0.6mm, and PE diaphragms are bonded on another surface of bitumen layer, produce the shockproof waterproof roll.
CN201710575921.4A 2017-07-14 2017-07-14 A kind of shockproof waterproof roll and preparation method Pending CN107351464A (en)

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Application Number Priority Date Filing Date Title
CN201710575921.4A CN107351464A (en) 2017-07-14 2017-07-14 A kind of shockproof waterproof roll and preparation method

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Application Number Priority Date Filing Date Title
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109995922A (en) * 2019-03-19 2019-07-09 宁国市千洪电子有限公司 A kind of mobile phone battery cover fodder

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106671537A (en) * 2017-02-27 2017-05-17 合肥中科富华新材料有限公司 Shock-proof waterproof coiled material and preparation method
CN206245605U (en) * 2016-11-23 2017-06-13 唐山德生防水股份有限公司 A kind of TPO single side self composite of water-proof coiled material with mortise and tenon bridging arrangement
CN106881926A (en) * 2017-02-27 2017-06-23 合肥中科富华新材料有限公司 A kind of mould proof waterproof roll and preparation method

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN206245605U (en) * 2016-11-23 2017-06-13 唐山德生防水股份有限公司 A kind of TPO single side self composite of water-proof coiled material with mortise and tenon bridging arrangement
CN106671537A (en) * 2017-02-27 2017-05-17 合肥中科富华新材料有限公司 Shock-proof waterproof coiled material and preparation method
CN106881926A (en) * 2017-02-27 2017-06-23 合肥中科富华新材料有限公司 A kind of mould proof waterproof roll and preparation method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109995922A (en) * 2019-03-19 2019-07-09 宁国市千洪电子有限公司 A kind of mobile phone battery cover fodder

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Application publication date: 20171117

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