CN108128007A - Block water foam and its preparation method and application - Google Patents

Block water foam and its preparation method and application Download PDF

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Publication number
CN108128007A
CN108128007A CN201711455689.7A CN201711455689A CN108128007A CN 108128007 A CN108128007 A CN 108128007A CN 201711455689 A CN201711455689 A CN 201711455689A CN 108128007 A CN108128007 A CN 108128007A
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China
Prior art keywords
foam
layer
blocks water
polyethylene
sensitive adhesive
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Granted
Application number
CN201711455689.7A
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Chinese (zh)
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CN108128007B (en
Inventor
李长顺
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Zhangjiagang Kangdexin Optronics Material Co Ltd
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Zhangjiagang Kangdexin Optronics Material Co Ltd
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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
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C41/00—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor
    • B29C41/24—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor for making articles of indefinite length
    • B29C41/32—Making multilayered or multicoloured articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
    • B29C55/02—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets
    • B29C55/10—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets multiaxial
    • B29C55/12—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets multiaxial biaxial
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C69/00—Combinations of shaping techniques not provided for in a single one of main groups B29C39/00 - B29C67/00, e.g. associations of moulding and joining techniques; Apparatus therefore
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C71/00—After-treatment of articles without altering their shape; Apparatus therefor
    • B29C71/04—After-treatment of articles without altering their shape; Apparatus therefor by wave energy or particle radiation, e.g. for curing or vulcanising preformed articles
    • 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
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin 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
    • 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
    • B32B27/304—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising vinyl halide (co)polymers, e.g. PVC, PVDC, PVF, PVDF
    • 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
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/18—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by features of a layer of foamed material
    • 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
    • B32B2266/00—Composition of foam
    • B32B2266/02—Organic
    • B32B2266/0214—Materials belonging to B32B27/00
    • B32B2266/025—Polyolefin
    • 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
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/306—Resistant to heat
    • 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
    • B32B2307/40—Properties of the layers or laminate having particular optical properties
    • B32B2307/412—Transparent
    • 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
    • B32B2307/724—Permeability to gases, adsorption
    • B32B2307/7242—Non-permeable
    • B32B2307/7244—Oxygen barrier
    • 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
    • B32B2307/724—Permeability to gases, adsorption
    • B32B2307/7242—Non-permeable
    • B32B2307/7246—Water vapor barrier
    • 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
    • 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
    • B32B2307/732—Dimensional properties
    • B32B2307/734—Dimensional stability
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J2301/00—Additional features of adhesives in the form of films or foils
    • C09J2301/10—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet
    • C09J2301/12—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet by the arrangement of layers
    • C09J2301/122—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet by the arrangement of layers the adhesive layer being present only on one side of the carrier, e.g. single-sided adhesive tape
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J2301/00—Additional features of adhesives in the form of films or foils
    • C09J2301/10—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet
    • C09J2301/16—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet by the structure of the carrier layer
    • C09J2301/162—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet by the structure of the carrier layer the carrier being a laminate constituted by plastic layers only
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J2301/00—Additional features of adhesives in the form of films or foils
    • C09J2301/30—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier
    • C09J2301/302—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier the adhesive being pressure-sensitive, i.e. tacky at temperatures inferior to 30°C

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Laminated Bodies (AREA)
  • Adhesive Tapes (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)

Abstract

The present invention relates to foam technical field, block water foam and its preparation side and application in particular to one kind.The foam that blocks water includes pet layer, PVDC layers and foamed cotton layer.The foam that blocks water of the present invention, pet layer, PVDC layers and foamed cotton layer are combined with each other so that the foam that blocks water being prepared has both excellent block-water performance and cushion performance, penetrability can be less than 0.5g/ (m with high barrier2For 24 hours), and the abscess of the tridimensional network of foamed cotton layer and even compact, can effective protection electronic equipment etc., prolong the service life.

Description

Block water foam and its preparation method and application
Technical field
The present invention relates to foam technical field, block water foam and its preparation method and application in particular to one kind.
Background technology
With the development of society, the mobile electronic devices such as mobile phone, tablet computer have become common communication apparatus, especially It is the tool that mobile phone has become a high practicability indispensable in life.
At present, OLED technology has been widely used for mobile phone and shows at present, and the infiltration presentation in mobile phone increases year by year Trend.Since the trend of mobile phone development is slimming, in order to cater to public demand, the mobile phone screen of OLED also does more next It is thinner.But there are broken equivalent risks for frivolous OLED mobile phone screens.Therefore in the design process, usually it is attached to using foam The OLED screen curtain back side, to protect screen.Meanwhile with the fast development of mobile phone, higher and higher, mesh is required to the water proofing property of mobile phone Preceding requirement reaches the rank of IPX7, IPX8.And the block-water performance and cushion performance of foam currently used in the market are unsatisfactory, It is easy to cause failure or the damage of the equipment such as mobile phone.
In view of this, it is special to propose the present invention.
Invention content
The first object of the present invention is to provide one kind and blocks water foam, and the foam block-water performance that blocks water is excellent, and has There is preferable cushion performance, block-water performance and cushion performance can be had both, to protect electronic equipment, prolong the service life.
The second object of the present invention is to provide a kind of preparation method of the foam that blocks water, and the method passes through curtain coating The mode of co-extrusion prepares high-barrier PET, then high-barrier foam is prepared by the way of crosslinking with radiation, improves the barrier waterproof of foam Performance, and uniformity is good.
Another object of the present invention is to provide a kind of application of the foam that blocks water, be coated on the foam surface that blocks water from Section bar material has the effects that seal, block water, damping, suitable for all kinds of electric equipment products and component of machine etc..
In order to realize the above-mentioned purpose of the present invention, spy uses following technical scheme：
One kind blocks water foam, including pet layer, PVDC layers and foamed cotton layer.
Preferably, the thickness of the pet layer, PVDC layers and foamed cotton layer is respectively 5-15 μm, 5-15 μm and 60-100 μm.
Preferably, the thickness of the pet layer, PVDC layers and foamed cotton layer is respectively 10-15 μm, 10-15 μm and 60-80 μm. It is furthermore preferred that the thickness of the pet layer, PVDC layers and foamed cotton layer is respectively 15 μm, 15 μm and 60 μm.
The foam that blocks water of the present invention, pet layer, PVDC layers and foamed cotton layer is combined with each other so that is be prepared blocks water Foam has high barrier, has both excellent block-water performance and cushion performance, can effective protection electronic equipment etc., extend and use Service life.
PVDC layers of PVDC materials, intermolecular cohesiveness is strong, and crystallinity is high, and the chlorine atom in PVDC molecules have it is hydrophobic Property, hydrogen bond will not be formed, oxygen molecule and hydrone are difficult to be moved in PVDC molecules, so as to make it have excellent oxygen barrier and It hinders moist.
Preferably, the pet layer, PVDC layers and foamed cotton layer are the PET contacted successively by the way of co-extrusion is cast Layer, PVDC layers and foamed cotton layer are cast after co-extrusion and obtain the foam that blocks water by crosslinking with radiation.The penetrability of the foam that blocks water Less than 0.5g/ (m2·24h)。
Each layer obtained by being cast co-extrusion has the excellent transparency and dimensional stability, can more accurately control thickness Degree, meets the requirement of electric equipment products grade component of machine, and three layers of output, avoids the step of pasting foam, section The time has been saved, has improved efficiency.And the penetrability for the foam that blocks water obtained by being cast co-extrusion mode can be less than 0.5g/ (m2For 24 hours), block-water performance is effectively improved.Three layers are cast co-extrusion simultaneously and obtain, and can improve the adhesive effect between three layers, into One step improves water preventing ability.
By crosslinking with radiation, the polyethylene molecule of foamed cotton layer is made to become tridimensional network from two-dimensional structure, makes foamed cotton layer Chemically and physically characteristic accordingly enhanced, heat resisting and pressure resisting performance improves, and degree of cross linking size is controllable；And radiation condition, It can promote the foaming of foamed cotton layer, the high quality abscess of fine uniform densification can be obtained, foam is homogeneous, expansion rate Soon, production efficiency is high.
Preferably, the foamed cotton layer is mainly prepared by polyethylene and aid master batches；Wherein, the aid master batches are main It is prepared by polyethylene, impedance reinforcing aids and foaming agent.
Preferably, the foamed cotton layer is mainly prepared by the irradiated crosslinking of polyethylene and aid master batches.It is furthermore preferred that institute The mass ratio for stating polyethylene and aid master batches is 10 ﹕ (0.5-2), preferably 10 ﹕ (0.8-1.2)；Further preferably 10 ﹕ 1.
Preferably, the mass ratio of polyethylene, impedance reinforcing aids and foaming agent is (50-150) ﹕ in the aid master batches (0.5-1.5) ﹕ (0.5-1.5), preferably (80-120) ﹕ (1 ﹕ 1 of 0.8-1.2) ﹕ (0.8-1.2), further preferably 100 ﹕.
Preferably, the foaming agent includes one kind in azo-compound, sulfonyl hydrazines compound and nitroso compound It is or a variety of.It is furthermore preferred that the azo-compound includes azodicarbonamide and azodiisobutyronitrile；The sulfonyl hydrazines chemical combination Object includes benzene sulfonyl hydrazide and unifor；The nitroso compound includes N, N- dinitrosopentamethylene tetramines.Into One step is preferred, and the foaming agent preferably includes azodicarbonamide.
Preferably, the impedance reinforcing aids includes carbon-based impedance reinforcing aids.It is furthermore preferred that the impedance reinforcing aids Including one or more in activated carbon, graphite, graphene and carbon nanotube.It is further preferred that the impedance reinforcing aids Including carbon nanotube.
Preferably, the carbon nanotube is single-walled carbon nanotube.It is furthermore preferred that the length of the single-walled carbon nanotube is 1- 3 μm, a diameter of 1-2nm.
The impedance reinforcing aids is some function additives for referring to increase impedance, can fully be improved after addition described Block water the impedance behavior of foam, meets the needs of practical application.Carbon nanotube particle has high-conductivity, is the foam that blocks water Certain impedance effect is provided.
Preferably, the average molecular weight of the PET master batch of the pet layer is 8000-20000, and the density of the PET master batch is 1.1-1.33g/cm3, the melt index of the PET master batch is 10-22g/10min.
Preferably, the average molecular weight of PVDC master batches PVDC layers described be 50000-70000, the PVDC master batches it is close It spends for 0.65-0.8g/cm3, the melt index of the PVDC master batches is 2-6g/10min.
The average molecular weight of PVDC master batches within this range, is capable of providing excellent oxygen barrier and resistance is moist, and processes It is functional, uniform, transparent and dimensionally stable PVDC layers can be formed.
Preferably, the average molecular weight of the polyethylene is 80000-200000, and the density of the polyethylene is 0.85- 1.0g/cm3, the melt index of the polyethylene is 1-3g/10min.
The present invention also provides a kind of preparation methods of the foam that blocks water, and include the following steps：
Pet layer, PVDC layers and the foamed cotton layer that the raw material curtain coating co-extrusion of each layer is contacted successively, through biaxial tension and electricity Master slice is obtained after dizzy processing, master slice is irradiated, sided corona treatment, obtains the foam that blocks water.
By being cast co-extrusion for multilayer, improve and iris action penetrated to oxygen, vapor, prevent extraneous gas and Water enters, and improves block-water performance；By biaxial tension, improve the mechanical strength for the foam that blocks water, and further improve to gas and The barrier property of water, additionally it is possible to improve optical property, transparency and dimensional stability；By radiation treatment, make foamed cotton layer Polyethylene molecule becomes tridimensional network from two-dimensional structure, makes the chemically and physically characteristic of foamed cotton layer accordingly be enhanced, resistance to Warm pressure resistance performance improves, and degree of cross linking size is controllable；And radiation condition can promote the foaming of foamed cotton layer, can obtain thin The high quality abscess of small even compact, foam is homogeneous, and expansion rate is fast, and production efficiency is high.
Preferably, the temperature of feed inlet to the extrusion of the curtain coating co-extrusion is 120-230 DEG C.
Preferably, the step of irradiation includes：Master slice is irradiated by gamma-rays, the irradiation is 20- 60kGy.It is furthermore preferred that the irradiation is 50kGy.The radiation source of the gamma-radiation is preferably Co-60.
Preferably, the step of sided corona treatment includes：High-frequency ac voltage 5000-15000V/m2Processing.
Sided corona treatment is carried out using specific corona condition, effectively gained foam surface can be roughened, made Gained foam surface chemistry key is broken and degrades, and increases surface roughness and surface area, can be in subsequent applications with gluing Other components such as agent are connect fully to be fixedly linked.
Preferably, it is 3.5-4 times that the condition of the biaxial tension, which is cross directional stretch ratio, and longitudinal stretching ratio is 3-4 times.
Preferably, the preparation method of the foamed cotton layer includes：Polyethylene and aid master batches are kneaded in proportion, obtained Foamed cotton layer.It is furthermore preferred that the preparation method of the aid master batches includes：Polyethylene, impedance reinforcing aids and foaming agent are carried out It is kneaded, obtains aid master batches.
The present invention also provides a kind of application of the foam that blocks water, the foam that blocks water is used to prepare foam tape.
It is of the invention that foam has excellent block-water performance, antistatic property, impedance behavior and cushion performance, suitable for system Standby foam tape, and each electronic product and component of machine can be further used for.
Preferably, the foam tape includes block water foam and the release layer that are bonded to each other, and the release layer fits in institute State the surface of pet layer.
Preferably, it is coated with pressure sensitive adhesive between the pet layer and the release layer.
Preferably, the pressure sensitive adhesive includes one or more in rubber pressure-sensitive adhesive and resin pressure sensitive adhesive.
Preferably, the rubber pressure-sensitive adhesive includes one kind in natural rubber class pressure sensitive adhesive and synthetic rubber class pressure sensitive adhesive It is or a variety of.
Preferably, the resin pressure sensitive adhesive includes acrylic pressure-sensitive adhesivee, organic silicon pressure sensitive adhesive and polyurethanes pressure It is one or more in quick glue.
Preferably, the release layer include organic polymer release layer in it is one or more, preferably include polyethylene from Type layer, polypropylene release layer, makrolon release layer, polystyrene release layer, gathers polyethylene terephthalate release layer Methyl methacrylate release layer, poly- (4- methylpentenes) release layer, polyvinyl chloride peeling layer, polytetrafluoroethylene (PTFE) release layer and multiple It closes one or more in release layer.
Preferably, the preparation method of the foam tape, includes the following steps：
By slit extrusion coated mode the foam that blocks water pet layer surface pressure-sensitive adhesive coating, then in pressure sensitive adhesive table Face paste closes release layer, and winding obtains the foam tape.
Compared with prior art, beneficial effects of the present invention are：
(1) pet layer of the foam of the present invention that blocks water, PVDC layers provide excellent iris action, improve foam Block-water performance, the penetrability of the foam that blocks water can be less than 0.5g/ (m2·24h)；And the tridimensional network of foamed cotton layer with And the abscess of even compact, enhance the resistance to mild resistance to pressure energy and cushion performance of foamed cotton layer；
(2) preparation method of the present invention, prepares multilayer by way of being cast co-extrusion, improves to oxygen, vapor Penetrate iris action, prevent extraneous gas and water from entering, improve block-water performance；By biaxial tension, the foam that blocks water is improved Mechanical strength, and further improve the barrier property to gas and water, additionally it is possible to improve optical property, transparency and size Stability；
(3) preparation method of the present invention by radiation treatment, makes the polyethylene molecule of foamed cotton layer become from two-dimensional structure For tridimensional network, make the chemically and physically characteristic of foamed cotton layer accordingly be enhanced, heat resisting and pressure resisting performance improves, and the degree of cross linking Size is controllable；
(4) foam tape of the present invention has excellent block-water performance, and peeling force is up to 800gf；To material Adhesion strength is strong, can stablize and be adhered to OLED screen curtain back side etc., improves waterproof block-water performance.
Description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, to embodiment or will show below There is attached drawing needed in technology description to be briefly described.
Fig. 1 is the structure diagram of the foam that blocks water of the embodiment of the present invention；
Fig. 2 is the structure diagram of the foam tape of the embodiment of the present invention.
Reference numeral：
1-PET layers；2-PVDC layers；3- foamed cotton layers；
4- release layers；5- pressure sensitive adhesives.
Specific embodiment
Embodiment of the present invention is described in detail below in conjunction with embodiment, but those skilled in the art will Understand, the following example is merely to illustrate the present invention, and is not construed as limiting the scope of the invention.It is not specified in embodiment specific Condition person, the condition suggested according to normal condition or manufacturer carry out.Reagents or instruments used without specified manufacturer is The conventional products that can be obtained by commercially available purchase.
Embodiment 1
Referring to Fig. 1, it is the structure diagram of the foam that blocks water of the embodiment of the present invention, the foam that blocks water of the present embodiment, Including the pet layer 1, PVDC layers 2 and foamed cotton layer 3 contacted successively.The thickness of the pet layer 1, PVDC layers 2 and foamed cotton layer 3 is respectively 10 μm, 10 μm and 80 μm.The foam thickness 0.1mm that blocks water.
In the present embodiment, the foamed cotton layer 3 is blended obtained for 10 ﹕ 1 in mass ratio by polyethylene and aid master batches.It is described Aid master batches are prepared by polyethylene, carbon nanotube and azodicarbonamide for 100 ﹕, 1 ﹕ 1 in mass ratio.The polyethylene Average molecular weight is 80000, density 0.965g/cm3, melt index 1.5g/10min.The carbon nanotube is single wall carbon Nanotube (model XFQ045, manufacturer are Nanjing Xian Feng Nono-material Science ＆ Technology Ltd.).
The average molecular weight of the PET master batch of the pet layer 1 is 8000, density 1.14g/cm3, melt index 15g/ 10min。
The average molecular weight of the PVDC master batches of the PVDC layers 2 is 50000, density 0.77g/cm3, melt index is 3g/10min。
The preparation method of the foam that blocks water described in the present embodiment, includes the following steps：
(a) polyethylene, carbon nanotube, azodicarbonamide are blended in mass ratio for 100 ﹕, 1 ﹕ 1, in double screw extruder In be kneaded at 150-200 DEG C, be then granulated, obtain aid master batches；
(b) aid master batches obtained in step (a) and polyethylene 10 ﹕ 1 in mass ratio are blended；
(c) raw material is matched according to the component requirements of above-mentioned each layer of the foam that blocks water, then in three screw extruders respectively The raw material of the pet layer, PVDC layers and foamed cotton layer is added in, that is, is separately added into PET master batch, PVDC master batches and the step (b) In master batch obtained, by being cast extruder, into co-extrusion die head, carry out three laminar flows and prolong co-extrusion, it is horizontal then by biaxial tension It is 4 to stretch ratio, longitudinal stretching ratio is 4, then carries out the high-frequency ac voltage sided corona treatment of 10000V, and winding obtains mother Piece；
Wherein, be cast feed inlet to the head of extruder temperature set gradually for 150 DEG C -167 DEG C -177 DEG C -185 DEG C - 190℃；The thickness of the pet layer of the foam that blocks water is set as 10 μm, and the thickness of the PVDC layers of the foam that blocks water is set as 10 μ The thickness of the foamed cotton layer of m and the foam that blocks water is set as respectively 80 μm.
(d) step (c) master slice as made from curtain coating extruder is irradiated by gamma-rays, irradiation 50kGy, so Carry out 10000V/m again afterwards2High-frequency ac voltage sided corona treatment, obtain the foam that blocks water.
The present embodiment additionally provides a kind of foam tape, referring to Fig. 2, it is the foam tape described in the embodiment of the present invention Structure diagram, the foam tape includes block water foam and the release layer 4 that are bonded to each other, and the release layer 4 fits in institute State the surface of pet layer 1.Pressure sensitive adhesive 5 is coated between the pet layer 1 and the release layer 4.The pressure sensitive adhesive 5 is preferably propylene Acrylic pressure sensitive glue (model C502C, manufacturer grind new high-tech material (Nanjing) Co., Ltd to be comprehensive).
The preparation method of the foam tape includes：By slit extrusion coated mode the foam that blocks water pet layer 1 Surface pressure-sensitive adhesive coating 5, then on the surface of pressure sensitive adhesive 5, fitting release film forms release layer 4, and winding obtains the foam rubber Band.
The release layer includes one or more in organic polymer release layer, preferably includes polyethylene release layer, poly- Ethylene glycol terephthalate release layer, polypropylene release layer, makrolon release layer, polystyrene release layer, poly- methyl-prop E pioic acid methyl ester release layer, poly- (4- methylpentenes) release layer, polyvinyl chloride peeling layer, polytetrafluoroethylene (PTFE) release layer and compound release It is one or more in layer.Using model C25T, (25 μm of thickness, manufacturer are Yangzhou Wan Run Optoelectronics Technology in the present embodiment Co., Ltd) release film as release layer.
Embodiment 2
The foam that blocks water of the present embodiment, including pet layer, PVDC layers and the foamed cotton layer contacted successively.The pet layer, PVDC The thickness of layer and foamed cotton layer is respectively 5 μm, 15 μm and 80 μm.The foam thickness 0.1mm that blocks water.
In the present embodiment, the foamed cotton layer is blended obtained for 10 ﹕ 0.8 in mass ratio by polyethylene and aid master batches.Institute Aid master batches are stated to be prepared for 80 ﹕, 1.2 ﹕ 1.2 in mass ratio by polyethylene, carbon nanotube and azodicarbonamide.It is described poly- The average molecular weight of ethylene is 100000, density 0.975g/cm3, melt index 1.2g/10min.The carbon nanotube is Single-walled carbon nanotube (model XFQ045, manufacturer are Nanjing Xian Feng Nono-material Science ＆ Technology Ltd.).
The average molecular weight of the PET master batch of the pet layer is 10000, density 1.25g/cm3, melt index 13g/ 10min。
The average molecular weight of PVDC master batches PVDC layers described is 60000, density 0.75g/cm3, melt index is 2.5g/10min。
The preparation method of the foam that blocks water described in the present embodiment, includes the following steps：
(a) polyethylene, carbon nanotube, azodicarbonamide for 80 ﹕, 1.2 ﹕ 1.2 are blended in mass ratio, are squeezed in twin-screw Go out in machine and be kneaded at 170-220 DEG C, is then granulated, obtain aid master batches；
(b) aid master batches obtained in step (a) and polyethylene 10 ﹕ 0.8 in mass ratio are blended；
(c) raw material is matched according to the component requirements of above-mentioned each layer of the foam that blocks water, then in three screw extruders respectively The raw material of the pet layer, PVDC layers and foamed cotton layer is added in, that is, is separately added into PET master batch, PVDC master batches and the step (b) In master batch obtained, by being cast extruder, into co-extrusion die head, carry out three laminar flows and prolong co-extrusion, it is horizontal then by biaxial tension It is 3.5 to stretch ratio, longitudinal stretching ratio is 3, then carries out 5000V/m2High-frequency ac voltage sided corona treatment, winding obtains Master slice；
Wherein, be cast feed inlet to the head of extruder temperature set gradually for 170 DEG C -187 DEG C -197 DEG C -205 DEG C - 210℃；The thickness of the pet layer of the foam that blocks water is set as 5 μm, and the thickness of the PVDC layers of the foam that blocks water is set as 15 μm Respectively 80 μm are set as with the thickness of the foamed cotton layer of the foam that blocks water.
(d) step (c) master slice as made from curtain coating extruder is irradiated by gamma-rays, irradiation 40kGy, so Carry out 5000V/m again afterwards2High-frequency ac voltage sided corona treatment, obtain the foam that blocks water.
The present embodiment additionally provides a kind of foam tape, what the foam tape included being bonded to each other block water foam and release Layer, the release layer fit in the surface of the pet layer.Pressure sensitive adhesive is coated between the pet layer and the release layer.It is described Pressure sensitive adhesive is preferably acrylic pressure-sensitive adhesivee (model C502C, manufacturer grind new high-tech material (Nanjing) Co., Ltd to be comprehensive).
The preparation method of the foam tape includes：By slit extrusion coated mode the foam that blocks water pet layer Surface pressure-sensitive adhesive coating, then on the surface of pressure sensitive adhesive, fitting release film forms release layer, and winding obtains the foam tape. In the present embodiment using 25 μm of C25T thickness, manufacturer is Yangzhou Wan Run Electro-optical Technology, INC. (US) 62 Martin Road, Concord, Massachusetts 017) release film be used as from Type layer.
Embodiment 3
The foam that blocks water of the present embodiment, including pet layer, PVDC layers and the foamed cotton layer contacted successively.The pet layer, PVDC The thickness of layer and foamed cotton layer is respectively 15 μm, 5 μm and 80 μm.The foam thickness 0.1mm that blocks water.
In the present embodiment, the foamed cotton layer is blended obtained for 10 ﹕ 1.2 in mass ratio by polyethylene and aid master batches.Institute Aid master batches are stated to be prepared for 120 ﹕, 0.8 ﹕ 0.8 in mass ratio by polyethylene, carbon nanotube and azodicarbonamide.It is described poly- The average molecular weight of ethylene is 200000, density 1.0g/cm3, melt index 1g/10min.The carbon nanotube is single wall Carbon nanotube.
The average molecular weight of the PET master batch of the pet layer is 20000, density 1.32g/cm3, melt index 10g/ 10min。
The average molecular weight of PVDC master batches PVDC layers described is 70000, density 0.78g/cm3, melt index 2g/ 10min。
The preparation method of the foam that blocks water described in the present embodiment, includes the following steps：
(a) polyethylene, carbon nanotube, azodicarbonamide for 120 ﹕, 0.8 ﹕ 0.8 are blended in mass ratio, are squeezed in twin-screw Go out in machine and be kneaded at 180-230 DEG C, is then granulated, obtain aid master batches；
(b) aid master batches obtained in step (a) and polyethylene 10 ﹕ 1.2 in mass ratio are blended；
(c) raw material is matched according to the component requirements of above-mentioned each layer of the foam that blocks water, then in three screw extruders respectively The raw material of the pet layer, PVDC layers and foamed cotton layer is added in, that is, is separately added into PET master batch, PVDC master batches and the step (b) In master batch obtained, by being cast extruder, into co-extrusion die head, carry out three laminar flows and prolong co-extrusion, it is horizontal then by biaxial tension It is 3.5 to stretch ratio, longitudinal stretching ratio is 3.5, then carries out 15000V/m2High-frequency ac voltage sided corona treatment, winding Obtain master slice；
Wherein, be cast feed inlet to the head of extruder temperature set gradually for 165 DEG C -180 DEG C -187 DEG C -195 DEG C - 200℃；The thickness of the pet layer of the foam that blocks water is set as 15 μm, and the thickness of the PVDC layers of the foam that blocks water is set as 5 μm Respectively 80 μm are set as with the thickness of the foamed cotton layer of the foam that blocks water.
(d) step (c) master slice as made from curtain coating extruder is irradiated by gamma-rays, irradiation 60kGy, so Carry out 15000V/m again afterwards2High-frequency ac voltage sided corona treatment, obtain the foam that blocks water.
The present embodiment additionally provides a kind of foam tape, what the foam tape included being bonded to each other block water foam and release Layer, the release layer fit in the surface of the pet layer.Pressure sensitive adhesive is coated between the pet layer and the release layer.It is described Pressure sensitive adhesive is preferably acrylic pressure-sensitive adhesivee (model C502C, manufacturer grind new high-tech material (Nanjing) Co., Ltd to be comprehensive).
The preparation method of the foam tape includes：By slit extrusion coated mode the foam that blocks water pet layer Surface pressure-sensitive adhesive coating, then on the surface of pressure sensitive adhesive, fitting release film forms release layer, and winding obtains the foam tape. In the present embodiment using 25 μm of C25T thickness, manufacturer is Yangzhou Wan Run Electro-optical Technology, INC. (US) 62 Martin Road, Concord, Massachusetts 017) release film be used as from Type layer.
Embodiment 4
The foam that blocks water of the present embodiment, including pet layer, PVDC layers and the foamed cotton layer contacted successively.The pet layer, PVDC The thickness of layer and foamed cotton layer is respectively 5 μm, 5 μm and 100 μm.The foam thickness 0.11mm that blocks water.
In the present embodiment, the foamed cotton layer is blended obtained for 10 ﹕ 0.5 in mass ratio by polyethylene and aid master batches.Institute Aid master batches are stated to be prepared for 50 ﹕, 1.5 ﹕ 1.5 in mass ratio by polyethylene, carbon nanotube and azodicarbonamide.It is described poly- The average molecular weight of ethylene is 80000, density 0.965g/cm3, melt index 1.5g/10min.The carbon nanotube is Single-walled carbon nanotube.
The average molecular weight of the PET master batch of the pet layer 1 is 8000, density 1.14g/cm3, melt index 15g/ 10min。
The average molecular weight of the PVDC master batches of the PVDC layers 2 is 50000, density 0.77g/cm3, melt index is 3g/10min。
The preparation method of the foam that blocks water described in the present embodiment, includes the following steps：
(a) polyethylene, carbon nanotube, azodicarbonamide for 50 ﹕, 1.5 ﹕ 1.5 are blended in mass ratio, are squeezed in twin-screw Go out in machine and be kneaded at 150-200 DEG C, is then granulated, obtain aid master batches；
(b) aid master batches obtained in step (a) and polyethylene 10 ﹕ 0.5 in mass ratio are blended；
(c) raw material is matched according to the component requirements of above-mentioned each layer of the foam that blocks water, then in three screw extruders respectively The raw material of the pet layer, PVDC layers and foamed cotton layer is added in, that is, is separately added into PET master batch, PVDC master batches and the step (b) In master batch obtained, by being cast extruder, into co-extrusion die head, carry out three laminar flows and prolong co-extrusion, it is horizontal then by biaxial tension It is 4 to stretch ratio, longitudinal stretching ratio is 4, then carries out 10000V/m2High-frequency ac voltage sided corona treatment, winding obtains Master slice；
Wherein, be cast feed inlet to the head of extruder temperature set gradually for 150 DEG C -167 DEG C -177 DEG C -185 DEG C - 190℃；The thickness of the pet layer of the foam that blocks water is set as 5 μm, and the thickness of the PVDC layers of the foam that blocks water is set as 5 μm Respectively 100 μm are set as with the thickness of the foamed cotton layer of the foam that blocks water.
(d) step (c) master slice as made from curtain coating extruder is irradiated by gamma-rays, irradiation 50kGy, so Carry out 10000V/m again afterwards2High-frequency ac voltage sided corona treatment, obtain the foam that blocks water.
The present embodiment additionally provides a kind of foam tape, what the foam tape included being bonded to each other block water foam and release Layer, the release layer fit in the surface of the pet layer.Pressure sensitive adhesive is coated between the pet layer and the release layer.It is described Pressure sensitive adhesive is preferably acrylic pressure-sensitive adhesivee (model C502C, manufacturer grind new high-tech material (Nanjing) Co., Ltd to be comprehensive).
The preparation method of the foam tape includes：By slit extrusion coated mode the foam that blocks water pet layer Surface pressure-sensitive adhesive coating, then on the surface of pressure sensitive adhesive, fitting release film forms release layer, and winding obtains the foam tape. In the present embodiment using the release film of C25T (25 μm of thickness, manufacturer be Yangzhou Wan Run Electro-optical Technology, INC. (US) 62 Martin Road, Concord, Massachusetts 017) be used as from Type layer.
Embodiment 5
The foam that blocks water of the present embodiment, including pet layer, PVDC layers and the foamed cotton layer contacted successively.The pet layer, PVDC The thickness of layer and foamed cotton layer is respectively 15 μm, 15 μm and 60 μm.The foam thickness 0.09mm that blocks water.
In the present embodiment, the foamed cotton layer is blended obtained for 5 ﹕ 1 in mass ratio by polyethylene and aid master batches.It is described to help Masterbatch is prepared by polyethylene, carbon nanotube and azodicarbonamide for 150 ﹕, 0.5 ﹕ 0.5 in mass ratio.The polyethylene Average molecular weight for 80000, density 0.965g/cm3, melt index 1.5g/10min.The carbon nanotube is single wall Carbon nanotube.
The average molecular weight of the PET master batch of the pet layer 1 is 8000, density 1.14g/cm3, melt index 15g/ 10min。
The average molecular weight of the PVDC master batches of the PVDC layers 2 is 50000, density 0.77g/cm3, melt index is 3g/10min。
The preparation method of the foam that blocks water described in the present embodiment, includes the following steps：
(a) polyethylene, carbon nanotube, azodicarbonamide for 150 ﹕, 0.5 ﹕ 0.5 are blended in mass ratio, are squeezed in twin-screw Go out in machine and be kneaded at 150-200 DEG C, is then granulated, obtain aid master batches；
(b) aid master batches obtained in step (a) and polyethylene 5 ﹕ 1 in mass ratio are blended；
(c) raw material is matched according to the component requirements of above-mentioned each layer of the foam that blocks water, then in three screw extruders respectively The raw material of the pet layer, PVDC layers and foamed cotton layer is added in, that is, is separately added into PET master batch, PVDC master batches and the step (b) In master batch obtained, by being cast extruder, into co-extrusion die head, carry out three laminar flows and prolong co-extrusion, it is horizontal then by biaxial tension It is 4 to stretch ratio, longitudinal stretching ratio is 4, then carries out 10000V/m2High-frequency ac voltage sided corona treatment, winding obtains Master slice；
Wherein, be cast feed inlet to the head of extruder temperature set gradually for 150 DEG C -167 DEG C -177 DEG C -185 DEG C - 190℃；The thickness of the pet layer of the foam that blocks water is set as 15 μm, and the thickness of the PVDC layers of the foam that blocks water is set as 15 μ The thickness of the foamed cotton layer of m and the foam that blocks water is set as respectively 60 μm.
(d) step (c) master slice as made from curtain coating extruder is irradiated by gamma-rays, irradiation 50kGy, so Carry out 10000V/m again afterwards2High-frequency ac voltage sided corona treatment, obtain the foam that blocks water.
The present embodiment additionally provides a kind of foam tape, what the foam tape included being bonded to each other block water foam and release Layer, the release layer fit in the surface of the pet layer.Pressure sensitive adhesive is coated between the pet layer and the release layer.It is described Pressure sensitive adhesive is acrylic pressure-sensitive adhesivee (model C502C, manufacturer grind new high-tech material (Nanjing) Co., Ltd to be comprehensive).
The preparation method of the foam tape includes：By slit extrusion coated mode the foam that blocks water pet layer Surface pressure-sensitive adhesive coating, then on the surface of pressure sensitive adhesive, fitting release film forms release layer, and winding obtains the foam tape. In the present embodiment using the release film of C25T (25 μm of thickness, manufacturer be Yangzhou Wan Run Electro-optical Technology, INC. (US) 62 Martin Road, Concord, Massachusetts 017) be used as from Type layer.
Comparative example 1
Specific raw material, proportioning, preparation method and embodiment 1 are consistent, and difference lies in PVDC layers no.Comparative example 2
The preparation method of the foam tape of reference implementation example 1, difference lies in replaced with existing polyolefin copolymer foam The foam that blocks water in embodiment 1.
Experimental example 1
For the foam of block water foam and comparative example 1-2 that the embodiment of the present invention 1-5 is prepared into line density, water preventing ability Performance tests, the test results such as energy, 25% compression ratio and peeling force are shown in Table 1.
Wherein, density measurement uses balance, with reference to ASTM D3574；
Block-water performance test is using the instrument that blocks water, with reference to GBT 1038-2000；
The test of 25% compression ratio is using tensilon, with reference to JIS K6254；
Peel test force uses tensilon, with reference to GBT-2792-2014.
The performance test results of the foam of 1 different disposal of table
As seen from the above table, the foam that blocks water of the invention is with excellent block-water performance, and peel strength is high, to material Adhesion strength is strong, glues and property is good, can consolidate the back side for fitting in screen, improve waterproof block-water performance.
Although illustrate and describing the present invention with specific embodiment, it will be appreciated that without departing substantially from the present invention's Many other change and modification can be made in the case of spirit and scope.It is, therefore, intended that in the following claims Including belonging to all such changes and modifications in the scope of the invention.

Claims (10)

  1. The foam 1. one kind blocks water, which is characterized in that successively including pet layer, PVDC layers and foamed cotton layer.
  2. 2. the foam according to claim 1 that blocks water, which is characterized in that the thickness point of the pet layer, PVDC layers and foamed cotton layer It Wei not be 5-15 μm, 5-15 μm and 60-100 μm.
  3. 3. the foam according to claim 1 that blocks water, which is characterized in that the foamed cotton layer is mainly by polyethylene and aid master batches It is prepared；
    Wherein, the aid master batches are mainly prepared by polyethylene, impedance reinforcing aids and foaming agent；
    Preferably, the foamed cotton layer is mainly prepared by the irradiated crosslinking of polyethylene and aid master batches；
    Preferably, the polyethylene and the mass ratio of aid master batches are 10 ﹕ (0.5-2)；
    It is furthermore preferred that the polyethylene and the mass ratio of aid master batches are 10 ﹕ (0.8-1.2)；
    It is further preferred that the polyethylene and the mass ratio of aid master batches are 10 ﹕ 1.
  4. 4. the foam according to claim 3 that blocks water, which is characterized in that polyethylene, impedance enhancing help in the aid master batches The mass ratio of agent and foaming agent is (50-150) ﹕ (0.5-1.5) ﹕ (0.5-1.5), preferably (80-120) ﹕ (0.8-1.2) ﹕ (0.8-1.2), 1 ﹕ 1 of further preferably 100 ﹕.
  5. 5. the foam according to claim 3 that blocks water, which is characterized in that the foaming agent includes azo-compound, sulfohydrazide It is one or more in class compound and nitroso compound；
    Preferably, the foaming agent includes azodicarbonamide；
    Preferably, the impedance reinforcing aids includes carbon-based impedance reinforcing aids；
    It is furthermore preferred that the impedance reinforcing aids is including one or more in activated carbon, graphite, graphene and carbon nanotube；
    It is further preferred that the impedance reinforcing aids includes carbon nanotube.
  6. 6. blocked water foam according to claim 1-5 any one of them, which is characterized in that the pet layer, PVDC layers and foamed cotton layer For pet layer, PVDC layers and the foamed cotton layer contacted successively by the way of co-extrusion is cast, pass through crosslinking with radiation after being cast co-extrusion Obtain the foam that blocks water.
  7. The preparation method of foam 7. claim 1-6 any one of them blocks water, which is characterized in that include the following steps：
    Pet layer, PVDC layers and the foamed cotton layer that the raw material curtain coating co-extrusion of each layer is contacted successively, at biaxial tension and corona Master slice is obtained after reason, master slice is irradiated, sided corona treatment obtains the foam that blocks water；
    Preferably, the step of irradiation includes：Master slice is irradiated by gamma-rays, the irradiation is 20-60kGy；
    It is furthermore preferred that the irradiation is 50kGy.
  8. 8. the preparation method of the foam according to claim 7 that blocks water, which is characterized in that the preparation method packet of the foamed cotton layer It includes：Polyethylene and aid master batches are kneaded in proportion, obtain foamed cotton layer；
    Preferably, the preparation method of the aid master batches includes：Polyethylene, impedance reinforcing aids and foaming agent are kneaded, Obtain aid master batches.
  9. The application of foam 9. claim 1-6 any one of them blocks water, which is characterized in that the foam that blocks water is used to prepare bubble Celloidin band；
    Preferably, the foam tape includes block water foam and the release layer that are bonded to each other, and the release layer fits in the PET The surface of layer.
    It is furthermore preferred that it is coated with pressure sensitive adhesive between the pet layer and the release layer；
    Optionally, the pressure sensitive adhesive includes one or more in rubber pressure-sensitive adhesive and resin pressure sensitive adhesive；
    Optionally, the rubber pressure-sensitive adhesive includes one kind or more in natural rubber class pressure sensitive adhesive and synthetic rubber class pressure sensitive adhesive Kind；
    Optionally, the resin pressure sensitive adhesive includes acrylic pressure-sensitive adhesivee, organic silicon pressure sensitive adhesive and polyurethanes pressure sensitive adhesive In it is one or more；
    Optionally, the release layer include organic polymer release layer in it is one or more, preferably include polyethylene release layer, Polyethylene terephthalate release layer, polypropylene release layer, makrolon release layer, polystyrene release layer, poly- methyl Methyl acrylate release layer, poly- (4- methylpentenes) release layer, polyvinyl chloride peeling layer, polytetrafluoroethylene (PTFE) release layer and it is compound from It is one or more in type layer.
  10. 10. the application of the foam according to claim 9 that blocks water, which is characterized in that the preparation method packet of the foam tape It includes：
    By slit extrusion coated mode the foam that blocks water pet layer surface pressure-sensitive adhesive coating, then pressure sensitive adhesive surface paste Release layer is closed, winding obtains the foam tape.
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CN111978881A (en) * 2020-08-11 2020-11-24 湖北祥源新材科技股份有限公司 Foam buffering adhesive tape for electronic product and preparation method thereof
CN112706487A (en) * 2020-12-23 2021-04-27 广德祥源新材科技有限公司 One-step forming spraying-free wood grain foam and production process thereof
CN113263850A (en) * 2021-05-13 2021-08-17 刘晨 Latex ink digital printing film material for improving washing fading phenomenon and preparation method thereof
CN114231202A (en) * 2021-12-24 2022-03-25 常州丰锦塑胶科技有限公司 Sponge adhesive tape and preparation method thereof

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CN114231202A (en) * 2021-12-24 2022-03-25 常州丰锦塑胶科技有限公司 Sponge adhesive tape and preparation method thereof

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