CN107163346A - Two grades of expanded materials and preparation method thereof are blended in a kind of LDPE/PA6 - Google Patents

Two grades of expanded materials and preparation method thereof are blended in a kind of LDPE/PA6 Download PDF

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Publication number
CN107163346A
CN107163346A CN201710484787.7A CN201710484787A CN107163346A CN 107163346 A CN107163346 A CN 107163346A CN 201710484787 A CN201710484787 A CN 201710484787A CN 107163346 A CN107163346 A CN 107163346A
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China
Prior art keywords
temperature
area
ldpe
foaming
parts
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廖华勇
陶国良
刘春林
徐小云
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Changzhou University
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Changzhou University
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B9/00—Making granules
    • B29B9/02—Making granules by dividing preformed material
    • B29B9/06—Making granules by dividing preformed material in the form of filamentary material, e.g. combined with extrusion
    • 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
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/34—Auxiliary operations
    • B29C44/60—Measuring, controlling or regulating
    • 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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/76—Measuring, controlling or regulating
    • 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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/76—Measuring, controlling or regulating
    • B29C45/78—Measuring, controlling or regulating of temperature
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/92—Measuring, controlling or regulating
    • 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
    • C08J3/20—Compounding polymers with additives, e.g. colouring
    • C08J3/22—Compounding polymers with additives, e.g. colouring using masterbatch techniques
    • C08J3/226—Compounding polymers with additives, e.g. colouring using masterbatch techniques using a polymer as a carrier
    • 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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    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
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    • C08L23/06—Polyethene
    • 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
    • B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
    • B29C2945/76—Measuring, controlling or regulating
    • B29C2945/76494—Controlled parameter
    • B29C2945/76531—Temperature
    • 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
    • B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
    • B29C2945/76—Measuring, controlling or regulating
    • B29C2945/76494—Controlled parameter
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    • 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
    • B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
    • B29C2945/76—Measuring, controlling or regulating
    • B29C2945/76655—Location of control
    • B29C2945/76658—Injection unit
    • B29C2945/76665—Injection unit screw
    • 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
    • B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
    • B29C2945/76—Measuring, controlling or regulating
    • B29C2945/76655—Location of control
    • B29C2945/76658—Injection unit
    • B29C2945/76668—Injection unit barrel
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92504—Controlled parameter
    • B29C2948/9258—Velocity
    • B29C2948/9259—Angular velocity
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92504—Controlled parameter
    • B29C2948/92704—Temperature
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92819—Location or phase of control
    • B29C2948/92857—Extrusion unit
    • B29C2948/92876—Feeding, melting, plasticising or pumping zones, e.g. the melt itself
    • B29C2948/92885—Screw or gear
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92819—Location or phase of control
    • B29C2948/92857—Extrusion unit
    • B29C2948/92876—Feeding, melting, plasticising or pumping zones, e.g. the melt itself
    • B29C2948/92895—Barrel or housing
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92819—Location or phase of control
    • B29C2948/92857—Extrusion unit
    • B29C2948/92904—Die; Nozzle zone
    • 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
    • C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
    • C08J2323/04—Homopolymers or copolymers of ethene
    • C08J2323/06—Polyethene
    • C—CHEMISTRY; METALLURGY
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    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2423/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
    • C08J2423/04—Homopolymers or copolymers of ethene
    • C08J2423/06—Polyethene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • C08K2003/2296—Oxides; Hydroxides of metals of zinc
    • 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
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/24—Acids; Salts thereof
    • C08K3/26—Carbonates; Bicarbonates
    • C08K2003/265—Calcium, strontium or barium carbonate
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2201/00—Properties
    • C08L2201/08—Stabilised against heat, light or radiation or oxydation
    • 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
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
    • C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
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    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
    • C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
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    • C08L2207/06—Properties of polyethylene
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Abstract

Two grades of expanded materials and preparation method thereof are blended the present invention relates to foaming material shaped field, more particularly to a kind of LDPE/PA6.First prepare LDPE/PA6 intermingling materials, 20 parts by weight nylon foaming agents are filled in 80 parts by weight LDPE, prepare nylon foaming concentrate, AC foaming agents by 20 parts by weight decomposition temperatures higher than 200 DEG C are filled in 20 parts by weight LDPE, prepare AC foaming concentrates, then LDPE/PA6 intermingling materials, nylon foaming concentrate and AC foaming concentrates are blended, then LDPE/PA6 is made by single screw extrusion machine or injector or moulding press and two grades of expanded materials are blended.It is high (can reach more than 30) that two grades of expanded material expansion ratios are blended in LDPE/PA6 produced by the present invention, elasticity and excellent combination property, with the characteristic such as weather-proof, heatproof, solvent resistant, ageing-resistant, available for packing, automobile, heat insulation, building, buffer pad, the field such as sqouynd absorption lowering noise.

Description

Two grades of expanded materials and preparation method thereof are blended in a kind of LDPE/PA6
Technical field
Two grades of expanded materials and its system is blended the present invention relates to foaming material shaped field, more particularly to a kind of LDPE/PA6 Preparation Method.
Background technology
Low density polyethylene (LDPE) (LDPE) has higher toughness and excellent resistance to low temperature, but for chemistry and machinery work It is very sensitive with environmental stress is waited, heat-resistant aging is poor；LDPE expanded materials are relatively conventional, and it is unable to high temperature resistant, solvent resistant Performance is also inadequate, such as dimethylbenzene.Nylon 6 (PA6) has good combination property (including mechanical property, heat resistance, wear-resistant The combination properties such as property, chemical proofing and self lubricity), and coefficient of friction is low, there is certain anti-flammability；PA6 expanded materials Price is higher, and resistance to low temperature and toughness are also not as good as LDPE.
Current LDPE/PA6 intermingling materials have been present, but because LDPE/PA6 intermingling materials density is big, cost is high, especially The price of nylon is higher, it is necessary to which a kind of density is smaller in industrial production and application, and performance preferably LDPE/PA6 materials. But the technical barrier that presently, there are is：Nylon low intensity, it is not easy to foam, the technique that PA6 expanded materials are prepared in the prior art Complexity, high to equipment requirement, cost is high；PA6 blending foaming is that foaming agent is directly added in Blending Processes, is so easily scattered Loss, causes its insufficient situation that foams, simultaneously because nylon foaming agent decomposition temperature is at 225-260 DEG C, and PA6 melting temperature Degree is at 225-235 DEG C, and temperature is approached, therefore directly addition foaming agent is difficult to ensure that foaming agent foams inside PA6, there is foaming The low problem of uneven, expansion ratio.
The content of the invention
The technical problem to be solved in the present invention is：In order to solve to prepare, LDPE/PA6 blending foaming materials cost is high, foam It is insufficient, foam uneven and low expansion ratio the problem of, the present invention provide a kind of LDPE/PA6 be blended two grades of expanded materials and Its preparation method.
The technical solution adopted for the present invention to solve the technical problems is：Two grades of expanded materials are blended in a kind of LDPE/PA6, It is according to the formula of parts by weight：LDPE and PA6 total number is 100 parts, and LDPE and PA6 weight ratio are 10：90—90： 10, compatilizer is 5~20 parts, and crosslinking agent is 2~4 parts, and assistant crosslinking agent is 1~2 part, and nylon foaming concentrate is 5~40 parts, AC hairs 2~8 parts of masterbatch is steeped, zinc oxide is 4~8 parts, and stearic acid is 1~2 part, and antioxidant is 0.3~0.6 part, and inorganic filler is 5~10 Part, 5~20 parts of polyolefin；LDPE/PA6 intermingling materials are first prepared, 20 parts by weight nylon foaming agents are filled in 80 parts by weight In LDPE, nylon foaming concentrate is prepared, the AC foaming agents by 20 parts by weight decomposition temperatures higher than 200 DEG C are filled in 20 parts by weight In LDPE, AC foaming concentrates are prepared, then LDPE/PA6 intermingling materials, nylon foaming concentrate and AC foaming concentrates are blended, then LDPE/PA6 is made by single screw extrusion machine or injector or moulding press two grades of expanded materials are blended.
Preferably, the compatilizer is grafted low density polyethylene maleic anhydride (LDPE-g-MAH), ethyl vinyl acetate second One or more in alkene copolymer (EVA), ethene and methyl acrylate copolymer (EMA)；The crosslinking agent is peroxidating two One or more in isopropylbenzene (DCP), benzoyl peroxide (BPO)；The assistant crosslinking agent is divinylbenzene；It is described inorganic Filler is calcium carbonate or mica powder；The polyolefin is polypropylene (PP), polyethylene octene elastomer (POE), EPDM One or more in rubber (EPDM), LLDPE (LLDPE).
The preparation method of two grades of expanded materials is blended in a kind of LDPE/PA6, and its concrete operation step includes：
(1) LDPE/PA6 intermingling materials are prepared, PA6 is dried 8 hours in 100 DEG C of baking ovens, according to formula, by LDPE, PA6, compatilizer, crosslinking agent, assistant crosslinking agent, zinc oxide, stearic acid, antioxidant, inorganic filler and polyolefin blend, pass through double spiral shells LDPE/PA6 intermingling materials are made in bar extruder extruding pelletization, screw speed 40-80r/min, and the area's temperature of extruder one is 160 DEG C, two area's temperature are 230 DEG C, and three area's temperature are 240 DEG C, and four area's temperature are 250 DEG C, and five area's temperature are 250 DEG C, and six area's temperature are 240 DEG C, seven area's temperature are 240 DEG C, and eight area's temperature are 230 DEG C, and nine area's temperature are 230 DEG C, and head temperature is 230 DEG C；Wherein, it is double Screw extruder is as shown in Figure 4.
(2) nylon foaming concentrate is prepared, 20 parts by weight nylon foaming agents and 80 parts by weight LDPE are passed through into high-speed mixer Blending, then extrudes pelletizing by double screw extruder, and nylon foaming concentrate, extruder is made in screw speed 30-60r/min One area's temperature is 150 DEG C, and two area's temperature are 155 DEG C, and three area's temperature are 170 DEG C, and four area's temperature are 180 DEG C, and five area's temperature are 180 DEG C, six area's temperature are 180 DEG C, and seven area's temperature are 180 DEG C, and eight area's temperature are 180 DEG C, and nine area's temperature are 190 DEG C, and head temperature is 185℃；Wherein, nylon foaming agent is filled in LDPE, forms nylon foaming concentrate；Double screw extruder is as shown in Figure 4.
(3) AC foaming concentrates are prepared, 20 parts by weight decomposition temperatures are higher than to 200 DEG C of AC foaming agents and 80 parts by weight LDPE It is blended by high-speed mixer, pelletizing is then extruded by single screw extrusion machine, AC foaming is made in screw speed 30-40r/min Masterbatch, the area's temperature of extruder one is 150 DEG C, and two area's temperature are 155 DEG C, and three area's temperature are 170 DEG C, and four area's temperature are 180 DEG C, five Area's temperature is 180 DEG C, and six area's temperature are 180 DEG C, and seven area's temperature are 180 DEG C, and eight area's temperature are 180 DEG C, and nine area's temperature are 180 DEG C, head temperature is 180 DEG C；Wherein, AC foaming agents are filled in LDPE, form AC foaming concentrates；Double screw extruder is such as Shown in Fig. 4.
Preferably, AC foaming agent of the decomposition temperature higher than 200 DEG C is AC-2000, AC-2001, AC-2002, AC- 2300 or AC-2003.
(4) extrusion foaming, according to formula, by Buddhist nun made from LDPE/PA6 intermingling materials made from step (1), step (2) AC foaming concentrates made from imperial foaming concentrate and step (3) are blended, and then extrude pelletizing, screw speed by single screw extrusion machine 40-60r/min, is made LDPE/PA6 and two grades of expanded materials is blended, the area's temperature of extruder one is 230 DEG C, and two area's temperature are 240 DEG C, three area's temperature are 250 DEG C, and head temperature is 240 DEG C；Or foam-injection, according to formula, by LDPE/ made from step (1) AC foaming concentrates made from nylon foaming concentrate made from PA6 intermingling materials, step (2) and step (3) are blended, and then pass through note Machine injection moulding is penetrated, screw speed 40-60r/min is made LDPE/PA6 and two grades of expanded materials are blended, the area's temperature of injector one is 230 DEG C, two area's temperature are 240 DEG C, and three area's temperature are 250 DEG C, and head temperature is 240 DEG C；Or moulded from foam, according to formula, By AC hairs made from nylon foaming concentrate made from LDPE/PA6 intermingling materials made from step (1), step (2) and step (3) Masterbatch is steeped in 240-260 DEG C of mould with 1-15MPa pressure foaming 5-30min, is removed from the molds after cooling, LDPE/PA6 is made two grades of expanded materials are blended.Wherein, single screw extrusion machine is as shown in Figure 5；Injector is as shown in Figure 6.
The beneficial effects of the invention are as follows：Foaming concentrate prepared by the present invention, can avoid powdered foaming agent from using Occur the phenomenon being scattered in journey, strengthen mixed effect.AC foaming agents decompose and LDPE phases is foamed at low temperature, nylon foaming Agent is decomposed and nylon 6 is mutually foamed at high temperature, that is, carry out two grades of foaming that LDPE first foams, foamed after nylon, and preparation is total to Mixed expanded material has the advantages that both, good combination property.And changed according to formula rate, blending foaming material has price Advantage, LDPE prices are relatively low, and PA6 prices are slightly higher, and blending foaming material falls between.If AC foaming agents are low Do not decomposed completely under temperature, can continue to decompose in high temperature so that completely, nylon foaming agent is not it is also possible that have for foaming materials There are the LDPE phases fully foamed further to foam, the foaming agent in two kinds of foaming concentrates is decomposed successively with the rise of temperature, LDPE and PA6 alternately foams so that LDPE and PA6 foaming is abundant, therefore two grades of foaming are blended in LDPE/PA6 produced by the present invention Foaming materials multiplying power height (can reach more than 30), elasticity and excellent combination property, with weather-proof, heatproof, solvent resistant, ageing-resistant etc. Characteristic, available for packing, automobile, heat insulation, building, buffer pad, the field such as sqouynd absorption lowering noise.
Brief description of the drawings
The present invention is further described with reference to the accompanying drawings and examples.
Fig. 1 is that two grades of expanded material electron microscopes are blended in LDPE/PA6 prepared by embodiment 1；Every ten small lattice in Fig. 1 scales For 5mm.
Fig. 2 is LDPE/PA6 blending foaming material electron microscopes prepared by comparative example 1；Every ten small lattice are in Fig. 2 scales 5mm。
Fig. 3 is LDPE/PA6 blending foaming material electron microscopes prepared by comparative example 2；Every ten small lattice are in Fig. 3 scales 5mm。
Fig. 4 is double screw extruder schematic diagram.In figure 1 be extruder an area, the like, 9 be 9th area of extruder, 10 be head, and 11 be base, and 12 be motor, and 13 be hopper.
Fig. 5 is single screw extrusion machine schematic diagram.In figure 1 be extruder an area, 2 be 2nd area of extruder, and 3 be extruder 3rd area, 4 be head, and 5 be base, and 6 be motor, and 7 be hopper.
Fig. 6 is injector schematic diagram.In figure 1 be injector an area, 2 be 2nd area of injector, and 3 be the three of injector Area, 4 be right angle female connector, and 5 be mould emptier, and 6 be pull bar, and 7 be cylinder, and 8 be only antiflowback valve, and 9 be heater, and 10 be screw rod, 11 It is hopper, 12 be motor.
Embodiment
The present invention will be described in more detail by embodiment, but protection scope of the present invention is not limited to these realities Apply example.
Embodiment 1
Foaming formulation (following number is parts by weight)：
LDPE40.8 parts, 40 parts of PA6,8 parts of compatilizer LDPE-g-MAH, crosslinking agent cumyl peroxide (DCP) 3 Part, 1 part of assistant crosslinking agent divinylbenzene, 4 parts of AC foaming concentrates, 20 parts of nylon foaming concentrate, 4 parts of zinc oxide, 2 parts of stearic acid, 3,098 0.4 parts of antioxidant, 6 parts of inorganic filler calcium carbonate, 10 parts of PP.
Foam process：
(1) LDPE/PA6 intermingling materials are prepared, PA6 is dried 8 hours in 100 DEG C of baking ovens, according to formula, by LDPE, PA6, compatilizer, crosslinking agent, assistant crosslinking agent, zinc oxide, stearic acid, antioxidant, inorganic filler and polyolefin blend, pass through double spiral shells LDPE/PA6 intermingling materials are made in bar extruder extruding pelletization, screw speed 80r/min, and the area's temperature of extruder one is 160 DEG C, Two area's temperature are 230 DEG C, and three area's temperature are 240 DEG C, and four area's temperature are 250 DEG C, and five area's temperature are 250 DEG C, and six area's temperature are 240 DEG C, seven area's temperature are 240 DEG C, and eight area's temperature are 230 DEG C, and nine area's temperature are 230 DEG C, and head temperature is 230 DEG C；
(2) nylon foaming concentrate is prepared, 20 parts by weight nylon foaming agents and 80 parts by weight LDPE are passed through into high-speed mixer Blending, then extrudes pelletizing by double screw extruder, and nylon foaming concentrate, the area of extruder one is made in screw speed 50r/min Temperature is 150 DEG C, and two area's temperature are 155 DEG C, and three area's temperature are 170 DEG C, and four area's temperature are 180 DEG C, and five area's temperature are 180 DEG C, Six area's temperature are 180 DEG C, and seven area's temperature are 180 DEG C, and eight area's temperature are 180 DEG C, and nine area's temperature are 190 DEG C, and head temperature is 185 ℃；
(3) AC foaming concentrates are prepared, 20 parts by weight AC-2000 foaming agents and 80 parts by weight LDPE are passed through into high-speed mixer Blending, then extrudes pelletizing by single screw extrusion machine, and AC foaming concentrates, the area's temperature of extruder one is made in screw speed 30r/min Spend for 150 DEG C, two area's temperature are 155 DEG C, three area's temperature are 170 DEG C, four area's temperature are 180 DEG C, five area's temperature are 180 DEG C, six Area's temperature is 180 DEG C, and seven area's temperature are 180 DEG C, and eight area's temperature are 180 DEG C, and nine area's temperature are 180 DEG C, and head temperature is 180 ℃；
(4) extrusion foaming, according to formula, by Buddhist nun made from LDPE/PA6 intermingling materials made from step (1), step (2) AC foaming concentrates made from imperial foaming concentrate and step (3) are blended, and then extrude pelletizing, screw speed by single screw extrusion machine 50r/min, is made LDPE/PA6 and two grades of expanded materials is blended, the area's temperature of extruder one is 230 DEG C, and two area's temperature are 240 DEG C, three Area's temperature is 250 DEG C, and head temperature is 240 DEG C.
The density for measuring LDPE/PA6 intermingling materials is 1.06g/cm3, take out LDPE/PA6 and two grades of expanded materials be blended, survey The tearing strength for obtaining expanded material is 11N/mm, and density is 0.03g/cm3, expansion ratio is 35, and its electromicroscopic photograph is shown in Fig. 1.Figure Middle display, the microstructure of material is graininess, and particle is presented uniform distribution, has larger gap each other, this shows The expansion ratio of material is higher, is consistent with actually detected expansion ratio for 35.
Embodiment 2
Foaming formulation (following number is parts by weight)：
LDPE40.8 parts, 40 parts of PA6,8 parts of compatilizer LDPE-g-MAH, crosslinking agent cumyl peroxide (DCP) 3 Part, 1 part of assistant crosslinking agent divinylbenzene, 4 parts of AC foaming concentrates, 20 parts of nylon foaming concentrate, 4 parts of zinc oxide, 2 parts of stearic acid, 3,098 0.4 parts of antioxidant, 6 parts of inorganic filler calcium carbonate, 10 parts of PP.
Foam process：
(1) LDPE/PA6 intermingling materials are prepared, PA6 is dried 8 hours in 100 DEG C of baking ovens, according to formula, by LDPE, PA6, compatilizer, crosslinking agent, assistant crosslinking agent, zinc oxide, stearic acid, antioxidant, inorganic filler and polyolefin blend, pass through double spiral shells LDPE/PA6 intermingling materials are made in bar extruder extruding pelletization, screw speed 80r/min, and the area's temperature of extruder one is 160 DEG C, Two area's temperature are 230 DEG C, and three area's temperature are 240 DEG C, and four area's temperature are 250 DEG C, and five area's temperature are 250 DEG C, and six area's temperature are 240 DEG C, seven area's temperature are 240 DEG C, and eight area's temperature are 230 DEG C, and nine area's temperature are 230 DEG C, and head temperature is 230 DEG C；
(2) nylon foaming concentrate is prepared, 20 parts by weight nylon foaming agents and 80 parts by weight LDPE are passed through into high-speed mixer Blending, then extrudes pelletizing by double screw extruder, and nylon foaming concentrate, the area of extruder one is made in screw speed 50r/min Temperature is 150 DEG C, and two area's temperature are 155 DEG C, and three area's temperature are 170 DEG C, and four area's temperature are 180 DEG C, and five area's temperature are 180 DEG C, Six area's temperature are 180 DEG C, and seven area's temperature are 180 DEG C, and eight area's temperature are 180 DEG C, and nine area's temperature are 190 DEG C, and head temperature is 185 ℃；
(3) AC foaming concentrates are prepared, 20 parts by weight AC-2000 foaming agents and 80 parts by weight LDPE are passed through into high-speed mixer Blending, then extrudes pelletizing by single screw extrusion machine, and AC foaming concentrates, the area's temperature of extruder one is made in screw speed 30r/min Spend for 150 DEG C, two area's temperature are 155 DEG C, three area's temperature are 170 DEG C, four area's temperature are 180 DEG C, five area's temperature are 180 DEG C, six Area's temperature is 180 DEG C, and seven area's temperature are 180 DEG C, and eight area's temperature are 180 DEG C, and nine area's temperature are 180 DEG C, and head temperature is 180 ℃；
(4) foam-injection, according to formula, by Buddhist nun made from LDPE/PA6 intermingling materials made from step (1), step (2) AC foaming concentrates made from imperial foaming concentrate and step (3) are blended, then by injector injection moulding, screw speed 50r/ Min, is made LDPE/PA6 and two grades of expanded materials is blended, the area's temperature of injector one is 230 DEG C, and two area's temperature are 240 DEG C, three area's temperature Spend for 250 DEG C, head temperature is 240 DEG C.
The density for measuring LDPE/PA6 intermingling materials is 1.19g/cm3, take out LDPE/PA6 and two grades of expanded materials be blended, survey The tearing strength for obtaining expanded material is 16N/mm, and density is 0.02g/cm3, expansion ratio is 60.
Embodiment 3
Foaming formulation (following number is parts by weight)：
LDPE40.8 parts, 40 parts of PA6,8 parts of compatilizer LDPE-g-MAH, crosslinking agent cumyl peroxide (DCP) 3 Part, 1 part of assistant crosslinking agent divinylbenzene, 4 parts of AC foaming concentrates, 20 parts of nylon foaming concentrate, 4 parts of zinc oxide, 2 parts of stearic acid, 3,098 0.4 parts of antioxidant, 6 parts of inorganic filler calcium carbonate, 10 parts of PP.
Foam process：
(1) LDPE/PA6 intermingling materials are prepared, PA6 is dried 8 hours in 100 DEG C of baking ovens, according to formula, by LDPE, PA6, compatilizer, crosslinking agent, assistant crosslinking agent, zinc oxide, stearic acid, antioxidant, inorganic filler and polyolefin blend, pass through double spiral shells LDPE/PA6 intermingling materials are made in bar extruder extruding pelletization, screw speed 80r/min, and the area's temperature of extruder one is 160 DEG C, Two area's temperature are 230 DEG C, and three area's temperature are 240 DEG C, and four area's temperature are 250 DEG C, and five area's temperature are 250 DEG C, and six area's temperature are 240 DEG C, seven area's temperature are 240 DEG C, and eight area's temperature are 230 DEG C, and nine area's temperature are 230 DEG C, and head temperature is 230 DEG C；
(2) nylon foaming concentrate is prepared, 20 parts by weight nylon foaming agents and 80 parts by weight LDPE are passed through into high-speed mixer Blending, then extrudes pelletizing by double screw extruder, and nylon foaming concentrate, the area of extruder one is made in screw speed 50r/min Temperature is 150 DEG C, and two area's temperature are 155 DEG C, and three area's temperature are 170 DEG C, and four area's temperature are 180 DEG C, and five area's temperature are 180 DEG C, Six area's temperature are 180 DEG C, and seven area's temperature are 180 DEG C, and eight area's temperature are 180 DEG C, and nine area's temperature are 190 DEG C, and head temperature is 185 ℃；
(3) AC foaming concentrates are prepared, 20 parts by weight AC-2000 foaming agents and 80 parts by weight LDPE are passed through into high-speed mixer Blending, then extrudes pelletizing by single screw extrusion machine, and AC foaming concentrates, the area's temperature of extruder one is made in screw speed 30r/min Spend for 150 DEG C, two area's temperature are 155 DEG C, three area's temperature are 170 DEG C, four area's temperature are 180 DEG C, five area's temperature are 180 DEG C, six Area's temperature is 180 DEG C, and seven area's temperature are 180 DEG C, and eight area's temperature are 180 DEG C, and nine area's temperature are 180 DEG C, and head temperature is 180 ℃；
(4) moulded from foam, according to formula, by Buddhist nun made from LDPE/PA6 intermingling materials made from step (1), step (2) AC foaming concentrates made from imperial foaming concentrate and step (3), with 12MPa pressure foaming 12min, treat cold in 240 DEG C of mould But it is removed from the molds afterwards, LDPE/PA6 is made two grades of expanded materials are blended.
The density for measuring LDPE/PA6 intermingling materials is 1.06g/cm3, take out LDPE/PA6 and two grades of expanded materials be blended, survey The tearing strength for obtaining expanded material is 13N/mm, and density is 0.04g/cm3, expansion ratio is 32.
Comparative example 1
Foaming formulation (following number is parts by weight)：
LDPE44 parts, 40 parts of PA6,8 parts of compatilizer LDPE-g-MAH, 3 parts of crosslinking agent cumyl peroxide (DCP), 1 part of assistant crosslinking agent divinylbenzene, 20 parts of nylon foaming concentrate, 4 parts of zinc oxide, 2 parts of stearic acid, 3,098 0.4 parts of antioxidant, 6 parts of inorganic filler calcium carbonate, 10 parts of PP.
Foam process：
(1) LDPE/PA6 intermingling materials are prepared, PA6 is dried 8 hours in 100 DEG C of baking ovens, according to formula, by LDPE, PA6, compatilizer, crosslinking agent, assistant crosslinking agent, zinc oxide, stearic acid, antioxidant, inorganic filler and polyolefin blend, pass through double spiral shells LDPE/PA6 intermingling materials are made in bar extruder extruding pelletization, screw speed 80r/min, and the area's temperature of extruder one is 160 DEG C, Two area's temperature are 230 DEG C, and three area's temperature are 240 DEG C, and four area's temperature are 250 DEG C, and five area's temperature are 250 DEG C, and six area's temperature are 240 DEG C, seven area's temperature are 240 DEG C, and eight area's temperature are 230 DEG C, and nine area's temperature are 230 DEG C, and head temperature is 230 DEG C；
(2) nylon foaming concentrate is prepared, 20 parts by weight nylon foaming agents and 80 parts by weight LDPE are passed through into high-speed mixer Blending, then extrudes pelletizing by double screw extruder, and nylon foaming concentrate, the area of extruder one is made in screw speed 50r/min Temperature is 150 DEG C, and two area's temperature are 155 DEG C, and three area's temperature are 170 DEG C, and four area's temperature are 180 DEG C, and five area's temperature are 180 DEG C, Six area's temperature are 180 DEG C, and seven area's temperature are 180 DEG C, and eight area's temperature are 180 DEG C, and nine area's temperature are 190 DEG C, and head temperature is 185 ℃；
(3) extrusion foaming, according to formula, by Buddhist nun made from LDPE/PA6 intermingling materials made from step (1) and step (2) Imperial foaming concentrate blending, then extrudes pelletizing by single screw extrusion machine, and LDPE/PA6 blendings are made in screw speed 50r/min Expanded material, the area's temperature of extruder one is 230 DEG C, and two area's temperature are 240 DEG C, and three area's temperature are 250 DEG C, and head temperature is 240 ℃。
The density for measuring LDPE/PA6 intermingling materials is 1.17g/cm3, take out LDPE/PA6 and two grades of expanded materials be blended, survey The tearing strength for obtaining expanded material is 3N/mm, and density is 0.15g/cm3, expansion ratio is 8, and expanded material electromicroscopic photograph is shown in figure 2.Shown in figure, abscess has several sizes not waited, and some sizes are smaller (diameter about 0.1mm), have slightly larger (diameter is about 0.4mm), inhomogeneities distribution is presented, the expansion ratio of material is not high, is consistent with actually detected expansion ratio for 8.
Comparative example 2
Foaming formulation (following number is parts by weight)：
LDPE56.8 parts, 40 parts of PA6,8 parts of compatilizer LDPE-g-MAH, crosslinking agent cumyl peroxide (DCP) 3 Part, 1 part of assistant crosslinking agent divinylbenzene, 4 parts of AC foaming concentrates, 4 parts of zinc oxide, 2 parts of stearic acid, 3,098 0.4 parts of antioxidant, 6 parts of inorganic filler calcium carbonate, 10 parts of PP.
Foam process：
(1) LDPE/PA6 intermingling materials are prepared, PA6 is dried 8 hours in 100 DEG C of baking ovens, according to formula, by LDPE, PA6, compatilizer, crosslinking agent, assistant crosslinking agent, zinc oxide, stearic acid, antioxidant, inorganic filler and polyolefin blend, pass through double spiral shells LDPE/PA6 intermingling materials are made in bar extruder extruding pelletization, screw speed 80r/min, and the area's temperature of extruder one is 160 DEG C, Two area's temperature are 230 DEG C, and three area's temperature are 240 DEG C, and four area's temperature are 250 DEG C, and five area's temperature are 250 DEG C, and six area's temperature are 240 DEG C, seven area's temperature are 240 DEG C, and eight area's temperature are 230 DEG C, and nine area's temperature are 230 DEG C, and head temperature is 230 DEG C；
(2) AC foaming concentrates are prepared, 20 parts by weight AC-2000 foaming agents and 80 parts by weight LDPE are passed through into high-speed mixer Blending, then extrudes pelletizing by single screw extrusion machine, and AC foaming concentrates, the area's temperature of extruder one is made in screw speed 30r/min Spend for 150 DEG C, two area's temperature are 155 DEG C, three area's temperature are 170 DEG C, four area's temperature are 180 DEG C, five area's temperature are 180 DEG C, six Area's temperature is 180 DEG C, and seven area's temperature are 180 DEG C, and eight area's temperature are 180 DEG C, and nine area's temperature are 180 DEG C, and head temperature is 180 ℃；
(3) extrusion foaming, according to formula, by AC made from LDPE/PA6 intermingling materials made from step (1) and step (2) Foaming concentrate is blended, and then extrudes pelletizing by single screw extrusion machine, and LDPE/PA6 blending hairs are made in screw speed 50r/min Foam material, the area's temperature of extruder one is 230 DEG C, and two area's temperature are 240 DEG C, and three area's temperature are 250 DEG C, and head temperature is 240 DEG C.
The density for measuring LDPE/PA6 intermingling materials is 1.14g/cm3, take out LDPE/PA6 and two grades of expanded materials be blended, survey The tearing strength for obtaining expanded material is 2N/mm, and density is 0.38g/cm3, expansion ratio is 3, and expanded material electromicroscopic photograph is shown in figure 3.Shown in figure, the abscess-size of material is smaller, a diameter of 0.1-0.2mm, inhomogeneities distribution, the expansion ratio of material is presented It is relatively low, it is consistent with actually detected expansion ratio for 3.
Using the above-mentioned desirable embodiment according to the present invention as enlightenment, by above-mentioned description, relevant staff is complete Various changes and amendments can be carried out without departing from the scope of the technological thought of the present invention' entirely.The technology of this invention Property scope is not limited to the content on specification, it is necessary to its technical scope is determined according to right.

Claims (4)

1. two grades of expanded materials are blended in a kind of LDPE/PA6, it is characterised in that the expanded material according to parts by weight formula For：LDPE and PA6 total number is 100 parts, and LDPE and PA6 weight ratio are 10：90—90：10, compatilizer is 5~20 parts, Crosslinking agent is 2~4 parts, and assistant crosslinking agent is 1~2 part, and nylon foaming concentrate is 5~40 parts, 2~8 parts of AC foaming concentrates, zinc oxide For 4~8 parts, stearic acid is 1~2 part, and antioxidant is 0.3~0.6 part, and inorganic filler is 5~10 parts, 5~20 parts of polyolefin；First LDPE/PA6 intermingling materials are prepared, 20 parts by weight nylon foaming agents are filled in 80 parts by weight LDPE, nylon foaming is prepared Masterbatch, the AC foaming agents by 20 parts by weight decomposition temperatures higher than 200 DEG C are filled in 20 parts by weight LDPE, prepare AC foaming female Material, then LDPE/PA6 intermingling materials, nylon foaming concentrate and AC foaming concentrates is blended, then pass through single screw extrusion machine or note Penetrate machine or moulding press is made LDPE/PA6 and two grades of expanded materials are blended.
2. two grades of expanded materials are blended in LDPE/PA6 as claimed in claim 1, it is characterised in that the compatilizer is low-density One or more in Research of Grafting Malaic Anhydride Onto Polyethylene, ethylene-vinyl acetate copolymer, ethene and methyl acrylate copolymer； The crosslinking agent is the one or more in cumyl peroxide, benzoyl peroxide；The assistant crosslinking agent is divinyl Benzene；The inorganic filler is calcium carbonate or mica powder；The polyolefin is polypropylene, polyethylene octene elastomer, ternary second One or more in third rubber, LLDPE.
3. the preparation method of two grades of expanded materials is blended in a kind of LDPE/PA6 as claimed in claim 1, it is characterised in that described Preparation method concrete operation step includes：
(1) LDPE/PA6 intermingling materials are prepared, PA6 is dried 8 hours in 100 DEG C of baking ovens, according to formula, by LDPE, PA6, Compatilizer, crosslinking agent, assistant crosslinking agent, zinc oxide, stearic acid, antioxidant, inorganic filler and polyolefin blend, are squeezed by twin-screw Go out machine extruding pelletization, LDPE/PA6 intermingling materials are made in screw speed 40-80r/min, and the area's temperature of extruder one is 160 DEG C, two Area's temperature is 230 DEG C, and three area's temperature are 240 DEG C, and four area's temperature are 250 DEG C, and five area's temperature are 250 DEG C, and six area's temperature are 240 DEG C, seven area's temperature are 240 DEG C, and eight area's temperature are 230 DEG C, and nine area's temperature are 230 DEG C, and head temperature is 230 DEG C；
(2) nylon foaming concentrate is prepared, 20 parts by weight nylon foaming agents are blended with 80 parts by weight LDPE by high-speed mixer, Then pelletizing is extruded by double screw extruder, nylon foaming concentrate, the area's temperature of extruder one is made in screw speed 30-60r/min Spend for 150 DEG C, two area's temperature are 155 DEG C, three area's temperature are 170 DEG C, four area's temperature are 180 DEG C, five area's temperature are 180 DEG C, six Area's temperature is 180 DEG C, and seven area's temperature are 180 DEG C, and eight area's temperature are 180 DEG C, and nine area's temperature are 190 DEG C, and head temperature is 185 ℃；
(3) AC foaming concentrates are prepared, the AC foaming agents by 20 parts by weight decomposition temperatures higher than 200 DEG C pass through with 80 parts by weight LDPE High-speed mixer is blended, and then extrudes pelletizing by single screw extrusion machine, and it is female that AC foaming is made in screw speed 30-40r/min Material, the area's temperature of extruder one is 150 DEG C, and two area's temperature are 155 DEG C, and three area's temperature are 170 DEG C, and four area's temperature are 180 DEG C, 5th area Temperature is 180 DEG C, and six area's temperature are 180 DEG C, and seven area's temperature are 180 DEG C, and eight area's temperature are 180 DEG C, and nine area's temperature are 180 DEG C, Head temperature is 180 DEG C；
(4) extrusion foaming, according to formula, nylon made from LDPE/PA6 intermingling materials made from step (1), step (2) is sent out AC foaming concentrates blending made from masterbatch and step (3) is steeped, pelletizing, screw speed 40- are then extruded by single screw extrusion machine 60r/min, is made LDPE/PA6 and two grades of expanded materials is blended, the area's temperature of extruder one is 230 DEG C, and two area's temperature are 240 DEG C, three Area's temperature is 250 DEG C, and head temperature is 240 DEG C；Or foam-injection, it is according to formula, LDPE/PA6 made from step (1) is common AC foaming concentrates blending made from nylon foaming concentrate made from mixed material, step (2) and step (3), then passes through injector Injection moulding, screw speed 40-60r/min is made LDPE/PA6 and two grades of expanded materials is blended, the area's temperature of injector one is 230 DEG C, two area's temperature are 240 DEG C, and three area's temperature are 250 DEG C, and head temperature is 240 DEG C；Or moulded from foam, according to formula, it will walk Suddenly LDPE/PA6 intermingling materials made from (1), nylon foaming concentrate made from step (2) and AC foaming made from step (3) are female Expect in 240-260 DEG C of mould with 1-15MPa pressure foaming 5-30min, be removed from the molds, be made after cooling Two grades of expanded materials are blended in LDPE/PA6.
4. the preparation method of two grades of expanded materials is blended in LDPE/PA6 as claimed in claim 3, it is characterised in that the decomposition AC foaming agent of the temperature higher than 200 DEG C is AC-2000, AC-2001, AC-2002, AC-2300 or AC-2003.
CN201710484787.7A 2017-06-23 2017-06-23 Two grades of expanded materials and preparation method thereof are blended in a kind of LDPE/PA6 Pending CN107163346A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116063727A (en) * 2023-01-13 2023-05-05 中化学科学技术研究有限公司 Polyamide foam material and preparation method thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116063727A (en) * 2023-01-13 2023-05-05 中化学科学技术研究有限公司 Polyamide foam material and preparation method thereof

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