CN107312245B - Gradient foaming polypropylene sheet and preparation method thereof - Google Patents
Gradient foaming polypropylene sheet and preparation method thereof Download PDFInfo
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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
- C08K5/00—Use of organic ingredients
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/24—Crosslinking, e.g. vulcanising, of macromolecules
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
- C08J7/12—Chemical modification
- C08J7/123—Treatment by wave energy or particle radiation
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
- C08J9/06—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent
- C08J9/10—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent developing nitrogen, the blowing agent being a compound containing a nitrogen-to-nitrogen bond
- C08J9/102—Azo-compounds
- C08J9/103—Azodicarbonamide
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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
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/07—Aldehydes; Ketones
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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
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/13—Phenols; Phenolates
- C08K5/132—Phenols containing keto groups, e.g. benzophenones
-
- 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
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/13—Phenols; Phenolates
- C08K5/134—Phenols containing ester groups
- C08K5/1345—Carboxylic esters of phenolcarboxylic acids
-
- 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
- C08K5/00—Use of organic ingredients
- C08K5/16—Nitrogen-containing compounds
- C08K5/34—Heterocyclic compounds having nitrogen in the ring
- C08K5/3467—Heterocyclic compounds having nitrogen in the ring having more than two nitrogen atoms in the ring
- C08K5/3472—Five-membered rings
- C08K5/3475—Five-membered rings condensed with carbocyclic rings
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2203/00—Foams characterized by the expanding agent
- C08J2203/04—N2 releasing, ex azodicarbonamide or nitroso compound
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2205/00—Foams characterised by their properties
- C08J2205/04—Foams characterised by their properties characterised by the foam pores
- C08J2205/044—Micropores, i.e. average diameter being between 0,1 micrometer and 0,1 millimeter
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2323/10—Homopolymers or copolymers of propene
- C08J2323/12—Polypropene
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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
- C08K2201/014—Additives containing two or more different additives of the same subgroup in C08K
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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
- C08L2203/00—Applications
- C08L2203/14—Applications used for foams
Abstract
The present invention provides a kind of gradient foaming polypropylene sheets and preparation method thereof.The diameter of the closed abscess in inside of the gradient foaming polypropylene sheet is become larger by appearance is inward-facing.In foaming polypropylene sheet according to the present invention and preparation method thereof, in the cross-linking process of the foaming polypropylene sheet, from outer surface to inside, because of the presence of a certain concentration ultraviolet light attenuant, ultraviolet ray intensity is gradually become smaller, and polypropylene crosslinking rate becomes smaller；Stop ultraviolet light before the deadline, sheet material will form the change of gradient of the degree of cross linking, i.e. melt strength gradient by outer surface to inside；Hereafter, sheet material foams at the same temperature, and because each position melt strength is different, the cell diameter of foaming is also different, and is become larger by sheet material outer surface to inside.The gradient distribution of the abscess is capable of the mechanical strength of reinforcing sheet, dimensional stability and the impact force etc. for resisting the external world.
Description
Technical field
The present invention relates to polymer modifications and manufacture field, more particularly to a kind of gradient foaming polypropylene sheet and its system
Preparation Method.
Background technique
High molecular foam material has light weight, stronger absorption shock loading ability and heat-insulating sound-insulating ability, uses extensively
In fields such as automobile, building, packaging, food and drink.There are polyvinyl chloride (PVC), polystyrene using more foamed material now
(PS), polyethylene (PE) and polyurethane (PU) etc., but it is all more or less that there are heat-resisting quantities is poor, mechanical strength is low, not ring
Guarantor and difficult the problem of recycling.
Polypropylene (PP) has excellent physical mechanical property, chemical stability, heat-resisting quantity and good electrical insulating property
Can, it is the hot spot for developing foamed plastics.Automobile as the important vehicles in life, people compare concern safety, sound insulation and
It is fuel-efficient etc..This requires the existing small density of automobile decoration material, the sound-proofing having had again and mechanical strength make at present
Even foaming plastic sheet is not met by requirement.
How automobile decoration material obtains higher mechanical strength and size under the premise of not reducing other performances simultaneously
Stability is the Main way of development.
Summary of the invention
In view of the problems in the background art, the purpose of the present invention is to provide a kind of gradient foaming polypropylene sheet and
The problem of preparation method, the mechanical performance that can solve existing foaming polypropylene sheet is not high, poor dimensional stability.
In a first aspect, the present invention provides a kind of gradient foaming polypropylene sheet, the diameter of internal closed abscess by
Appearance is inward-facing to be become larger.
Further, the diameter range of the abscess of the gradient foaming polypropylene sheet is 1 μm~100 μm.
Further, the gradient foaming polypropylene sheet with a thickness of 1mm~10mm.
In second aspect, the present invention provides a kind of preparation methods of gradient foaming polypropylene sheet, are used to prepare basis
Gradient foaming polypropylene sheet described in first aspect present invention, comprising steps of (1) is uniformly mixed according to a ratio polypropylene, hexichol
Ketone, trimethylolpropane trimethacrylate, azodicarbonamide, ultraviolet light attenuant and antioxidant 1010, obtain mixture；
(2) mixture in the step (1) is become into crystalline p p sheet through mixing, extrusion and calendering；(3) ultraviolet light irradiation institute is used
The surface of the crystalline p p sheet in step (2) is stated, time 1-5 minute, it is inward-facing gradually smaller by appearance to obtain melt strength
High melt strength, propylene sheet material；(4) by the high melt strength, propylene sheet material in the step (3), foamed furnace foaming is obtained
To gradient foaming polypropylene sheet.
Further, the polypropylene in the step (1), benzophenone, trimethylolpropane trimethacrylate, azo two
The mass ratio of formamide, ultraviolet light attenuant and antioxidant 1010 is 100:0.2:1.5:1:3:0.6.
Further, the ultraviolet light attenuant is at least phenyl salicylate, 2- (2 '-hydroxyls -5 '-aminomethyl phenyl) benzo
Triazole, 2,4 dihydroxyl benzophenone, ESCALOL 567, in 2-hydroxy-4-n-octoxybenzophenone
One kind.
Further, the blowing temperature of the foaming furnace in the step (4) is 180 DEG C~240 DEG C.
Further, the equipment of the mixing in the step (2) is double screw extruder.
Further, the equipment of the extrusion in the step (2) is single screw extrusion machine.
Further, the equipment of the calendering in the step (2) is multi-rolling mill.
It was found by the inventors of the present invention that being implicitly present in polypropylene hair manufacturing foaming polypropylene sheet in the prior art
Steep the not high problem of sheet mechanical strength.Therefore, the technical assignment or technical problem to be solved that the present invention to be realized
Be it is that those skilled in the art never expect or it is not expected that, therefore the present invention is a kind of new technical solution.
In foaming polypropylene sheet according to the present invention and preparation method thereof, in the crosslinking of the foaming polypropylene sheet
In the process, from outer surface to inside, because of the presence of a certain concentration ultraviolet light attenuant, ultraviolet ray intensity is gradually become smaller, polypropylene
Crosslinking rate becomes smaller；Stop ultraviolet light before the deadline, sheet material will form the ladder of the degree of cross linking by outer surface to inside
Degree variation, i.e. melt strength gradient；Hereafter, sheet material foams at the same temperature, because each position melt strength is different, the bubble of foaming
Bore dia is also different, and is become larger by sheet material outer surface to inside.The gradient distribution of the abscess is capable of the machinery of reinforcing sheet
Intensity, dimensional stability and the impact force etc. for resisting the external world.
Foaming polypropylene sheet prepared by the present invention can be used for the fields such as automobile, building, packaging, food and drink.Especially automobile
Industry, such as ceiling, door-plate, back-shelf board, luggage case, ground cushion, vehicle body outer bottom backplate and seat backup board.
Detailed description of the invention
Fig. 1 is the distribution of cells structural schematic diagram according to gradient foaming polypropylene sheet prepared by the present invention.
Specific embodiment
To keep the above objects, features, and advantages of invention more obvious and easy to understand, below to specific implementation of the invention
Mode is described in detail.
In the following description, numerous specific details are set forth in order to facilitate a full understanding of the present invention, but the present invention can be with
Implemented using other than the one described here other way, those skilled in the art can be without prejudice to intension of the present invention
In the case of do similar popularization, therefore the present invention is not limited by the specific embodiments disclosed below.
Referring to Fig.1, the present invention provides a kind of gradient foaming polypropylene sheets, and the diameter of internal closed abscess is by outer
Surface inwardly becomes larger.
In one embodiment, the diameter range of the abscess of the gradient foaming polypropylene sheet is 1 μm~100 μm.
In one embodiment, the gradient foaming polypropylene sheet with a thickness of 1mm~10mm.
The present invention provides a kind of preparation methods of gradient foaming polypropylene sheet, comprising steps of (1) mixes according to the ratio
Even polypropylene, benzophenone, trimethylolpropane trimethacrylate, azodicarbonamide, ultraviolet light attenuant and antioxidant
1010, obtain mixture；(2) mixture in the step (1) is become into crystalline p p sheet through mixing, extrusion and calendering；
(3) surface of the crystalline p p sheet in the step (2) described in ultraviolet light irradiation, time 1-5 minute obtain melt strength by appearance
Inward-facing gradually smaller high melt strength, propylene sheet material；(4) by the high melt strength, propylene piece in the step (3)
Material, foamed furnace foaming, obtains gradient foaming polypropylene sheet.
Polypropylene, benzophenone, trimethylolpropane trimethacrylate, azodicarbonamide, purple in the step (1)
The mass ratio of outer optical attenuation agent and antioxidant 1010 is 100:0.2:1.5:1:3:0.6.
The ultraviolet light attenuant is at least phenyl salicylate, 2- (2 '-hydroxyls -5 '-aminomethyl phenyl) benzotriazole, 2,
One of 4- dihydroxy benaophenonel, ESCALOL 567,2-hydroxy-4-n-octoxybenzophenone.
The blowing temperature of foaming furnace in the step (4) is 180 DEG C~240 DEG C.
The equipment of mixing in the step (2) is double screw extruder.
The equipment of extrusion in the step (2) is single screw extrusion machine.
The equipment of calendering in the step (2) is multi-rolling mill.
In foaming polypropylene sheet according to the present invention and preparation method thereof, in the crosslinking of the foaming polypropylene sheet
In the process, from outer surface to inside, because of the presence of a certain concentration ultraviolet light attenuant, ultraviolet ray intensity is gradually become smaller, polypropylene
Crosslinking rate becomes smaller；Stop ultraviolet light before the deadline, sheet material will form the ladder of the degree of cross linking by outer surface to inside
Degree variation, i.e. melt strength gradient；Hereafter, sheet material foams at the same temperature, because each position melt strength is different, the bubble of foaming
Bore dia is also different, and is become larger by sheet material outer surface to inside.The gradient distribution of the abscess is capable of the machinery of reinforcing sheet
Intensity, dimensional stability and the impact force etc. for resisting the external world.
Foaming polypropylene sheet prepared by the present invention can be used for the fields such as automobile, building, packaging, food and drink.Especially automobile
Industry, such as ceiling, door-plate, back-shelf board, luggage case, ground cushion, vehicle body outer bottom backplate and seat backup board.
Hereinafter, in conjunction with specific embodiments to a kind of ultraviolet light irradiation cross-linking foaming polypropylene sheet of the invention and its preparation
Method illustrates.
Embodiment 1
In a high speed mixer, temperature 50 C, 1500 revs/min of revolving speed, mixed at high speed homogeneous polypropylene, hexichol according to the ratio
Ketone, trimethylolpropane trimethacrylate, azodicarbonamide, phenyl salicylate and antioxidant 1010, mass ratio 100:
0.2:1.5:1:3:0.6 obtains mixture；The mixture is obtained into pellet, each area through double screw extruder mixing granulator
Temperature: 120 DEG C of an area, two 140 DEG C of areas, three 160 DEG C of areas, four 180 DEG C of areas, 175 DEG C of die head；Pellet addition single screw rod is squeezed
Out in machine, extrusion molding and tri-roll press machine calendering obtain the crystalline p p sheet of thickness 0.5mm, each area's temperature: 130 DEG C of an area,
185 DEG C of die head, cooling water is led in the roller of tri-roll press machine for two 145 DEG C of areas, three 150 DEG C of areas, four 180 DEG C of areas；Use ultraviolet light irradiation
The upper and lower surface of crystalline p p sheet described in two-sided irradiation simultaneously, the time 1 minute, it is inward-facing gradually by appearance to obtain melt strength
The high melt strength, propylene sheet material to become smaller；By the high melt strength, propylene sheet material, foamed furnace foams, and 250 DEG C of temperature,
Time 2 minutes, roll-in was cooling, obtained thickness 1mm, the gradient foaming polypropylene sheet of 1-100 μm of cell diameter range.
Embodiment 2
In addition to the following contents, other are consistent with embodiment 1:
2- (2 '-hydroxyls -5 '-aminomethyl phenyl) benzotriazole replaces phenyl salicylate；Ultraviolet light irradiation while two-sided spoke
According to the upper and lower surface of the crystalline p p sheet, the time is 3 minutes；The gradient foaming polypropylene sheet thickness of thickness 3mm.
Embodiment 3
In addition to the following contents, other are consistent with embodiment 1:
2,4 dihydroxyl benzophenone replaces phenyl salicylate；Polypropylene foil described in ultraviolet light irradiation two-sided irradiation simultaneously
The upper and lower surface of material, time are 5 minutes；The gradient foaming polypropylene sheet thickness of thickness 8mm.
Embodiment 4
In addition to the following contents, other are consistent with embodiment 1:
ESCALOL 567 replaces phenyl salicylate；Gather described in ultraviolet light irradiation two-sided irradiation simultaneously
The upper and lower surface of polypropylene sheet, time are 5 minutes；The gradient foaming polypropylene sheet thickness of thickness 8mm.
Embodiment 5
In addition to the following contents, other are consistent with embodiment 1:
2-hydroxy-4-n-octoxybenzophenone replaces phenyl salicylate；Described in ultraviolet light irradiation two-sided irradiation simultaneously
The upper and lower surface of crystalline p p sheet, time are 5 minutes；The gradient foaming polypropylene sheet thickness of thickness 10mm.
Comparative example 1
In addition to not using phenyl salicylate, other are same as Example 1.
Comparative example 2
Except the upper and lower surface of crystalline p p sheet described in ultraviolet light irradiation two-sided irradiation simultaneously, 10 minutes time is outer, other
It is same as Example 1.
Performance test
To examine gradient foaming polypropylene sheet made from the present embodiment, " polypropylene expanded is squeezed out referring to national standard
Material " (QB/T 4879-2015) test properties, the results are shown in Table 1.
Choose embodiment 1 made from gradient foaming polypropylene sheet, the cross section of electron microscope observation sheet material, obtain as
Distribution of cells structure shown in FIG. 1.
The performance of 1 foaming polypropylene sheet of table
As it can be seen from table 1 the gradient foaming polypropylene sheet in embodiment is poly- relative to the even foaming in comparative example
Polypropylene sheet has higher tensile strength, impact strength and elongation at break, and thermal stability is more preferable, and compression set is more
It is small.
Although some specific embodiments of the invention are described in detail by example, the skill of this field
Art personnel it should be understood that above example merely to being illustrated, the range being not intended to be limiting of the invention.The skill of this field
Art personnel are it should be understood that can without departing from the scope and spirit of the present invention modify to above embodiments.This hair
Bright range is defined by the following claims.
Claims (7)
1. a kind of gradient foaming polypropylene sheet, which is characterized in that the diameter of internal closed abscess is inward-facing gradually by appearance
Become larger, the preparation method of the gradient foaming polypropylene sheet comprising steps of
(1) it is uniformly mixed according to a ratio polypropylene, benzophenone, trimethylolpropane trimethacrylate, azodicarbonamide, ultraviolet
Optical attenuation agent and antioxidant 1010, obtain mixture；
(2) mixture in the step (1) is become into crystalline p p sheet through mixing, extrusion and calendering；
(3) with the surface of the crystalline p p sheet in step (2) described in ultraviolet light irradiation, time 1-5 minute, obtain melt strength by
The inward-facing gradually smaller high melt strength, propylene sheet material of appearance；
(4) by the high melt strength, propylene sheet material in the step (3), foamed furnace foaming obtains gradient expanded polypropylene
Sheet material；
Polypropylene, benzophenone, trimethylolpropane trimethacrylate, azodicarbonamide, ultraviolet light in the step (1)
The mass ratio of attenuant and antioxidant 1010 is 100:0.2:1.5:1:3:0.6；
The ultraviolet light attenuant is at least phenyl salicylate, 2- (2 '-hydroxyls -5 '-aminomethyl phenyl) benzotriazole, 2,4- bis-
One of dihydroxy benaophenonel, ESCALOL 567,2-hydroxy-4-n-octoxybenzophenone.
2. gradient foaming polypropylene sheet as described in claim 1, which is characterized in that the gradient foaming polypropylene sheet
The diameter range of abscess is 1 μm~100 μm.
3. gradient foaming polypropylene sheet as described in claim 1, which is characterized in that the gradient foaming polypropylene sheet
With a thickness of 1mm~10mm.
4. gradient foaming polypropylene sheet as described in claim 1, which is characterized in that foaming furnace in the step (4)
Blowing temperature is 180 DEG C~240 DEG C.
5. gradient foaming polypropylene sheet as described in claim 1, which is characterized in that mixing in the step (2) is set
Standby is double screw extruder.
6. gradient foaming polypropylene sheet as described in claim 1, which is characterized in that extrusion in the step (2) is set
Standby is single screw extrusion machine.
7. gradient foaming polypropylene sheet as described in claim 1, which is characterized in that calendering in the step (2) is set
Standby is multi-rolling mill.
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| CN201710665028.0A CN107312245B (en) | 2017-08-07 | 2017-08-07 | Gradient foaming polypropylene sheet and preparation method thereof |
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| CN201710665028.0A CN107312245B (en) | 2017-08-07 | 2017-08-07 | Gradient foaming polypropylene sheet and preparation method thereof |
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| CN108164814A (en) * | 2017-12-15 | 2018-06-15 | 中国科学院长春应用化学研究所 | A kind of polypropylene foam with graded pore structure and preparation method thereof |
| CN109203743B (en) * | 2018-08-06 | 2020-09-04 | 福建美明达鞋业发展有限公司 | Method for manufacturing three-dimensional pattern layer for shoe upper |
| CN114075356B (en) * | 2020-08-20 | 2023-09-22 | 神华(北京)新材料科技有限公司 | Polyethylene foam material with gradient pore structure and preparation method and application thereof |
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|---|---|---|---|---|
| CN102321309A (en) * | 2011-06-09 | 2012-01-18 | 四川大学 | Polymeric foam composite material having gradient structure and preparing method thereof |
| CN103113669A (en) * | 2013-01-16 | 2013-05-22 | 江苏大学 | Method for preparing gradient-controlled porous polymer structure material |
| CN104108151A (en) * | 2013-04-17 | 2014-10-22 | 北京化工大学 | Preparation method of polypropylene foaming sheet material through ultraviolet light radiation crosslinking |
| CN104497392A (en) * | 2014-12-09 | 2015-04-08 | 黑龙江省润特科技有限公司 | Ultraviolet cross-linking polyolefin foaming material and preparation method thereof |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102321309A (en) * | 2011-06-09 | 2012-01-18 | 四川大学 | Polymeric foam composite material having gradient structure and preparing method thereof |
| CN103113669A (en) * | 2013-01-16 | 2013-05-22 | 江苏大学 | Method for preparing gradient-controlled porous polymer structure material |
| CN104108151A (en) * | 2013-04-17 | 2014-10-22 | 北京化工大学 | Preparation method of polypropylene foaming sheet material through ultraviolet light radiation crosslinking |
| CN104497392A (en) * | 2014-12-09 | 2015-04-08 | 黑龙江省润特科技有限公司 | Ultraviolet cross-linking polyolefin foaming material and preparation method thereof |
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