CN107512056A - It is a kind of by powdered polypropylene expanded Foam sheet and preparation method - Google Patents

It is a kind of by powdered polypropylene expanded Foam sheet and preparation method Download PDF

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Publication number
CN107512056A
CN107512056A CN201710722925.0A CN201710722925A CN107512056A CN 107512056 A CN107512056 A CN 107512056A CN 201710722925 A CN201710722925 A CN 201710722925A CN 107512056 A CN107512056 A CN 107512056A
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parts
foam sheet
initiator
expanded foam
foaming agent
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Chinese (zh)
Inventor
陈庆
昝航
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Chengdu New Keli Chemical Science Co Ltd
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Chengdu New Keli Chemical Science Co Ltd
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Priority to CN201710722925.0A priority Critical patent/CN107512056A/en
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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
    • 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
    • B32B5/20—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 foamed in situ
    • 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
    • B32B27/065—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 foam
    • 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
    • B32B27/306—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising vinyl acetate or vinyl alcohol (co)polymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/06—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the heating method
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/10—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/14—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
    • B32B37/15—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with at least one layer being manufactured and immediately laminated before reaching its stable state, e.g. in which a layer is extruded and laminated while in semi-molten state
    • 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
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B2038/0052—Other operations not otherwise provided for
    • B32B2038/0084—Foaming
    • 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
    • B32B2250/00—Layers arrangement
    • B32B2250/24—All layers being polymeric
    • 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
    • B32B2266/0221—Vinyl 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
    • 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
    • B32B2307/10—Properties of the layers or laminate having particular acoustical properties
    • B32B2307/102—Insulating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/558—Impact strength, toughness
    • 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
    • B32B2307/72—Density

Abstract

Present invention relates particularly to field of plastic products, more particularly to a kind of by powdered polypropylene expanded Foam sheet and preparation method, it is characterised in that including following material：Polypropylene powder, PVA film, foaming agent, initiator, crosslinking agent, blowing promotor.Raw material polypropylene powder of the present invention powder softening under microwave heating condition is cohered, while foaming agent produces gas, and cooling and solidifying obtains preliminary foam sheet, then uses pressure extrusion plate extrusion forming by film foam sheet again.Manufactured foam sheet shaping is simple, lifts the compressive strength of foamed plastics, can the expanded application in the production of reality.

Description

It is a kind of by powdered polypropylene expanded Foam sheet and preparation method
Technical field
Present invention relates particularly to foam technology field, more particularly to a kind of by powdered polypropylene expanded foam Plastic tab and preparation method.
Background technology
Foamed plastics has the advantages that light, heat-insulated, buffering, insulation, anti-corrosion, cheap, therefore in commodity, bag Dress, industry, agricultural, transportation, war industry, aerospace industry are used widely, and China has steeped since the 1990s The development of foam plastics is very rapid, and wherein principal item has polyurethane (PU) soft and rigid foam, polystyrene (PS) Foamed plastics and polyethylene (PE) foamed plastics three major types.Harmful isocyanide in foaming process be present in polyurethane foam Acid esters residue, and expanded material can not recycle.And polystyrene（PS）It would generally be used in foaming process and arrive fluorine chlorine Hydrocarbon compound or butane, are adversely affected to environment, and product degraded is difficult and easily forms " white pollution ", the United Nations's environmental protection group Knit it is determined that stopping using PS foamed products.Crosslinked PE foam is rigidly relatively low, and maximum operation (service) temperature is 80 DEG C.
Expanded polypropylene material, it is a kind of remarkable highly crystalline type polymer/gas recombination material of performance, unique with it And superior performance turns into fastest-rising environment-friendly novel resistance to compression buffering heat-barrier material at present.Acrylic resin has light, former The features such as expecting the superior and excellent heat resistance of abundance, the ratio of performance to price, chemical resistance, being easily recycled, is the world The most fast general thermoplastic resin of upper increase of production amount, at present, China's PP resins have turned into the maximum resin variety of yield.But Using mainly assembling-disassembling and agricultural film, PP resin industries face that consumption structure is single, and demand is not prosperous and product specification is low The problem of.Each production of resins enterprise is all in positive adjustment production thinking, and Development and Production is marketable, high quality, high added value PP Pipe Compound, so that PP has bigger application value and economic benefit.Wherein the research and development of polypropylene foam are also into recent years The focus come, although polypropylene expanded product has good performance and application prospect, the development difficulty of polypropylene foam is very It is greatly, domestic at present that there has been no its related, core technology capable of being industrialized.Some developed countries greatly develop and made at present To substitute the environmentally friendly packing material of expanded polystyrene (EPS).
Response rate is high after expanded polypropylene material product has very excellent antidetonation energy absorption performance, deformation（Compressive strength It is good）, good heat resistance, chemicals-resistant, oil resistivity and thermal insulation;Meanwhile its light weight, article quality can be greatly reduced; In addition, EPP or a kind of environment-friendly materials, it is prone to β degradeds, and PP foams are easy to recycle, its environment friendly is better than Other foamed materials, thus it is referred to as " green " foam.The excellent properties showed just because of it so that EPP turn into after More application value and market potential is new after polystyrene (EPS), polyurethane (EPU), polyethylene (EPE) foamed material Foamed material.
The PP of conventional method production is a kind of line style semicrystalline polymeric, and strand is seldom branched, molecular weight distribution phase To narrower, this cause its softening point and fusing point very close to.Before temperature reaches fusing point, it does not flow substantially, when temperature surpasses After crossing fusing point, melt strength drastically declines, and this melt is difficult to encase gas;In addition, polypropylene is changed into crystallization from molten state State can release substantial amounts of heat, longer the time required to being solid by melt transform;In addition polypropylene air penetrability is high, and foamed gas are easy Escape.Therefore it is narrow suitable for polypropylene expanded temperature range, foaming process is difficult control, easily causes steep that wall in foaming process to break Split, gas is escaped, abscess caves in and bubble merging, the yield rate of thin slice processed are low, it is difficult to industrially expanded.
The content of the invention
Narrow for temperature range polypropylene expanded at present, foaming process is difficult control, easily causes to steep in foaming process The problems such as wall rupture, gas are escaped, abscess caves in and bubble merges, it is an object of the invention to provide one kind by powdered polypropylene Foam sheet of foaming and preparation method thereof, lift the compressive strength and puncture of foamed plastics.
To solve the above problems, the present invention uses following technical scheme：
It is a kind of by powdered polypropylene expanded Foam sheet, including following material：Polypropylene powder, PVA film, foaming Agent, initiator, crosslinking agent, blowing promotor.
Further, the material of following parts by weight is included：Polypropylene powder 70-90 parts, foaming agent 9-14 parts, initiator 6- 9 parts, crosslinking agent 1-3 parts, blowing promotor 1-3 parts.
Further, the material of following parts by weight is included：Polypropylene powder 73-84 parts, foaming agent 10-14 parts, initiator 6-8 parts, crosslinking agent 1-3 parts, blowing promotor 1-2 parts.
Further, the material of following parts by weight is included：78 parts of polypropylene powder, 13 parts of foaming agent, 7 parts of initiator, friendship Join 2 parts of agent, 2 parts of blowing promotor.
Further, the foaming agent is azodicarbonamide, superfine aluminium power, petroleum ether according to 3:2:1 parts by weight are mixed Conjunction forms.
Further, the initiator is dibenzoyl peroxide.
Further, the crosslinking agent is Methacrylamide and cumyl peroxide according to parts by weight 1:2 component Mixing.
By the preparation method of powdered polypropylene expanded Foam sheet, it is characterised in that the following institute of operating procedure Show：
1）Polypropylene powder, foaming agent, initiator, crosslinking agent, blowing promotor are mixed by weight；
2）PVA film is tiled, in the uniform one layer of step 1 in PVA film surface）Mixed raw material, one layer of PVA is then covered again Film；
3）The heat time is controlled to obtain foam sheet for 1-2min under microwave heating condition；
4）By step 3）The film foam sheet of middle shaping uses pressure extrusion plate extrusion forming；
5）Trimming, shaping.
Further, the step 2）In uniform one layer of step 1）Mixed raw thickness is controlled in 0.2-0.5cm.
Further, the pressure extrusion plate uses 10-20KPa.
The present invention is a kind of by powdered polypropylene expanded Foam sheet and preparation method thereof, with prior art phase Than, its protrude the characteristics of and excellent effect be：
（1）The polypropylene powder added in raw material polymerize in the presence of foaming agent, initiator, crosslinking agent, blowing promotor Reaction, continuously shaped Stability Analysis of Structures so that the foam plastic density of shaping is low, compressive strength and sound insulation coefficient are further carried Rise.
（2）In preparation method, powder softening is cohered under microwave heating condition, while foaming agent produces gas, and cooling is solid Change obtains preliminary foam sheet, while foaming agent produces gas, makes powder foam, and solidification obtains foam sheet, feature be Non-fully expanded polypropylene fine powder under molten state, avoid steep that wall rupture in foaming process, abscess caves in and bubble merges；PVA Film layer also plays encapsulation effect to gas, avoids gas from escaping so that in the thin slice of shaping while melt strength is lifted The crafters in portion is uniform.
Embodiment
Below by way of embodiment, the present invention is described in further detail, but this should not be interpreted as to the present invention Scope be only limitted to following example.In the case where not departing from above method thought of the present invention, according to ordinary skill The various replacements or change that knowledge and customary means are made, should be included in the scope of the present invention.
Embodiment 1
It is a kind of by powdered polypropylene expanded Foam sheet, including following material：78 parts of polypropylene powder, PVA film 63 parts, 13 parts of foaming agent, 7 parts of initiator, 2 parts of crosslinking agent, 2 parts of blowing promotor.
By the preparation method of powdered polypropylene expanded Foam sheet, comprise the following steps：
1）Polypropylene powder, foaming agent, initiator, crosslinking agent, blowing promotor are mixed by weight；
2）PVA film is tiled, in the uniform one layer of step 1 in PVA film surface）Mixed raw material, one layer of PVA is then covered again Film；
3）The heat time is controlled to obtain foam sheet for 1-2min under microwave heating condition；
4）By step 3）The film foam sheet of middle shaping uses pressure extrusion plate extrusion forming；
5）Trimming, shaping.
Embodiment 2
It is a kind of by powdered polypropylene expanded Foam sheet, including following material：73 parts of polypropylene powder, PVA film 61 parts, 14 parts of foaming agent, 8 parts of initiator, 1 part of crosslinking agent, 1 part of blowing promotor.
By the preparation method of powdered polypropylene expanded Foam sheet, comprise the following steps：
1）Polypropylene powder, foaming agent, initiator, crosslinking agent, blowing promotor are mixed by weight；
2）PVA film is tiled, in the uniform one layer of step 1 in PVA film surface）Mixed raw material, one layer of PVA is then covered again Film；
3）The heat time is controlled to obtain foam sheet for 2min under microwave heating condition；
4）By step 3）The film foam sheet of middle shaping uses pressure extrusion plate extrusion forming；
5）Trimming, shaping.
Foaming agent is azodicarbonamide, superfine aluminium power, petroleum ether according to 3:2:1 parts by weight mix.
Initiator is dibenzoyl peroxide.
Crosslinking agent is Methacrylamide and cumyl peroxide according to parts by weight 1:2 component mixing.
Embodiment 3
It is a kind of by powdered polypropylene expanded Foam sheet, including following material：79 parts of polypropylene powder, PVA film 56 parts, 11 parts of foaming agent, 6 parts of initiator, 3 parts of crosslinking agent, 1 part of blowing promotor.
By the preparation method of powdered polypropylene expanded Foam sheet, comprise the following steps：
1）Polypropylene powder, foaming agent, initiator, crosslinking agent, blowing promotor are mixed by weight；
2）PVA film is tiled, in the uniform one layer of step 1 in PVA film surface）Mixed raw material, one layer of PVA is then covered again Film；
3）The heat time is controlled to obtain foam sheet for 2min under microwave heating condition；
4）By step 3）The film foam sheet of middle shaping uses pressure extrusion plate extrusion forming；
5）Trimming, shaping.
Step 2）In uniform one layer of step 1）Mixed raw thickness is controlled in 0.5cm.
Foaming agent is azodicarbonamide, superfine aluminium power, petroleum ether according to 3:2:1 parts by weight mix.
Embodiment 4
It is a kind of by powdered polypropylene expanded Foam sheet, including following material：87 parts of polypropylene powder, PVA film 61 parts, 9 parts of foaming agent, 6 parts of initiator, 1 part of crosslinking agent, 3 parts of blowing promotor.
By the preparation method of powdered polypropylene expanded Foam sheet, comprise the following steps：
1）Polypropylene powder, foaming agent, initiator, crosslinking agent, blowing promotor are mixed by weight；
2）PVA film is tiled, in the uniform one layer of step 1 in PVA film surface）Mixed raw material, one layer of PVA is then covered again Film；
3）The heat time is controlled to obtain foam sheet for 1min under microwave heating condition；
4）By step 3）The film foam sheet of middle shaping uses pressure extrusion plate extrusion forming；
5）Trimming, shaping.
Step 2）In uniform one layer of step 1）Mixed raw thickness is controlled in 0.2cm.
Foaming agent is azodicarbonamide, superfine aluminium power, petroleum ether according to 3:2:1 parts by weight mix.
Embodiment 5
It is a kind of by powdered polypropylene expanded Foam sheet, including following material：77 parts of polypropylene powder, PVA film 59 parts, 9 parts of foaming agent, 9 parts of initiator, 2 parts of crosslinking agent, 3 parts of blowing promotor.
By the preparation method of powdered polypropylene expanded Foam sheet, comprise the following steps：
1）Polypropylene powder, foaming agent, initiator, crosslinking agent, blowing promotor are mixed by weight；
2）PVA film is tiled, in the uniform one layer of step 1 in PVA film surface）Mixed raw material, one layer of PVA is then covered again Film；
3）The heat time is controlled to obtain foam sheet for 1min under microwave heating condition；
4）By step 3）The film foam sheet of middle shaping uses pressure extrusion plate extrusion forming；
5）Trimming, shaping.
Step 2）In uniform one layer of step 1）Mixed raw thickness is controlled in 0.3cm.
Crosslinking agent is Methacrylamide and cumyl peroxide according to parts by weight 1:2 component mixing.
Embodiment 6
It is a kind of by powdered polypropylene expanded Foam sheet, including following material：70 parts of polypropylene powder, PVA film 63 parts, 10 parts of foaming agent, 8 parts of initiator, 2 parts of crosslinking agent, 2 parts of blowing promotor.
By the preparation method of powdered polypropylene expanded Foam sheet, comprise the following steps：
1）Polypropylene powder, foaming agent, initiator, crosslinking agent, blowing promotor are mixed by weight；
2）PVA film is tiled, in the uniform one layer of step 1 in PVA film surface）Mixed raw material, one layer of PVA is then covered again Film；
3）The heat time is controlled to obtain foam sheet for 2min under microwave heating condition；
4）By step 3）The film foam sheet of middle shaping uses pressure extrusion plate extrusion forming；
5）Trimming, shaping.
Step 2）In uniform one layer of step 1）Mixed raw thickness is controlled in 0.4cm.
Embodiment 7
It is a kind of by powdered polypropylene expanded Foam sheet, including following material：73 parts of polypropylene powder, PVA film 67 parts, 11 parts of foaming agent, 7 parts of initiator, 1 part of crosslinking agent, 1 part of blowing promotor.
By the preparation method of powdered polypropylene expanded Foam sheet, comprise the following steps：
1）Polypropylene powder, foaming agent, initiator, crosslinking agent, blowing promotor are mixed by weight；
2）PVA film is tiled, in the uniform one layer of step 1 in PVA film surface）Mixed raw material, one layer of PVA is then covered again Film；
3）The heat time is controlled to obtain foam sheet for 1min under microwave heating condition；
4）By step 3）The film foam sheet of middle shaping uses pressure extrusion plate extrusion forming；
5）Trimming, shaping.
Foaming agent is azodicarbonamide, superfine aluminium power, petroleum ether according to 3:2:1 parts by weight mix.
Embodiment 8
It is a kind of by powdered polypropylene expanded Foam sheet, including following material：84 parts of polypropylene powder, PVA film 65 parts, 12 parts of foaming agent, 6 parts of initiator, 2 parts of crosslinking agent, 2 parts of blowing promotor.
By the preparation method of powdered polypropylene expanded Foam sheet, comprise the following steps：
1）Polypropylene powder, foaming agent, initiator, crosslinking agent, blowing promotor are mixed by weight；
2）PVA film is tiled, in the uniform one layer of step 1 in PVA film surface）Mixed raw material, one layer of PVA is then covered again Film；
3）The heat time is controlled to obtain foam sheet for 1min under microwave heating condition；
4）By step 3）The film foam sheet of middle shaping uses pressure extrusion plate extrusion forming；
5）Trimming, shaping.
Crosslinking agent is Methacrylamide and cumyl peroxide according to parts by weight 1:2 component mixing.
Embodiment 9
It is a kind of by powdered polypropylene expanded Foam sheet, including following material：90 parts of polypropylene powder, PVA film 66 parts, 14 parts of foaming agent, 7 parts of initiator, 3 parts of crosslinking agent, 2 parts of blowing promotor.
By the preparation method of powdered polypropylene expanded Foam sheet, comprise the following steps：
1）Polypropylene powder, PVA film, foaming agent, initiator, crosslinking agent, blowing promotor are mixed by weight；
2）PVA film is tiled, in the uniform one layer of step 1 in PVA film surface）Mixed raw material, one layer of PVA is then covered again Film；
3）The heat time is controlled to obtain foam sheet for 2min under microwave heating condition；
4）By step 3）The film foam sheet of middle shaping uses pressure extrusion plate extrusion forming；
5）Trimming, shaping.
Crosslinking agent is Methacrylamide and cumyl peroxide according to parts by weight 1:2 component mixing.
Comparative example 1：
A kind of Foam sheet, including following material：56 parts of polypropylene powder, 11 parts of foaming agent, 6 parts of initiator, crosslinking agent 2 Part, 2 parts of blowing promotor.The preparation method used for：Polypropylene powder, foaming agent, initiator, crosslinking agent, blowing promotor are mixed Stirring is closed, is heated under microwave heating condition, stripper plate extrusion forming.
Comparative example 2：
A kind of Foam sheet, including following material：66 parts of polypropylene powder, 13 parts of foaming agent, 7 parts of initiator, crosslinking agent 2 Part, 3 parts of blowing promotor.The preparation method used for：Polypropylene powder, foaming agent, initiator, crosslinking agent, blowing promotor are mixed Stirring is closed, is heated under microwave heating condition, stripper plate extrusion forming.
Table 1:
Sample Density（kg/m3） Compressive strength（MPa） Dimensional stability（%）
Embodiment 1 32.25 0.38 0.35
Embodiment 2 32.17 0.39 0.35
Embodiment 3 32.90 0.41 0.36
Embodiment 4 32.09 0.39 0.34
Embodiment 5 32.26 0.38 0.36
Embodiment 6 31.91 0.39 0.35
Embodiment 7 32.19 0.36 0.35
Embodiment 8 32.28 0.37 0.34
Embodiment 9 29.99 0.35 0.31
Comparative example 1 57.91 0.14 3.5
Comparative example 2 58.02 0.18 2.9
By upper table, it could be assumed that, the foamed plastic compressive strength after foamed plastic reshaping provided by the invention is high, causes into The recovery effects of type are good, while can also lift the elongation at break of foamed plastics, and reduce the density of whole foamed plastic, make It is lighter.

Claims (10)

  1. It is 1. a kind of by powdered polypropylene expanded Foam sheet, it is characterised in that including following material：Polypropylene powder End, PVA film, foaming agent, initiator, crosslinking agent, blowing promotor.
  2. 2. as claimed in claim 1 by powdered polypropylene expanded Foam sheet, it is characterised in that including following heavy Measure the material of part：Polypropylene powder 70-90 parts, PVA film 56-67 parts, foaming agent 9-14 parts, initiator 6-9 parts, crosslinking agent 1- 3 parts, blowing promotor 1-3 parts.
  3. 3. as claimed in claim 2 by powdered polypropylene expanded Foam sheet, it is characterised in that including following heavy Measure the material of part：Polypropylene powder 73-84 parts, PVA film 61-65 parts, foaming agent 10-14 parts, initiator 6-8 parts, crosslinking agent 1-3 parts, blowing promotor 1-2 parts.
  4. 4. as claimed in claim 3 by powdered polypropylene expanded Foam sheet, it is characterised in that including following heavy Measure the material of part：78 parts of polypropylene powder, 63 parts of PVA film, 13 parts of foaming agent, 7 parts of initiator, 2 parts of crosslinking agent, blowing promotor 2 parts.
  5. 5. as described in claim any one of 1-4 by powdered polypropylene expanded Foam sheet, it is characterised in that institute Foaming agent is stated as azodicarbonamide, superfine aluminium power, petroleum ether is according to 3:2:1 parts by weight mix.
  6. 6. as described in claim any one of 1-4 by powdered polypropylene expanded Foam sheet, it is characterised in that institute It is dibenzoyl peroxide to state initiator.
  7. 7. as described in claim any one of 1-4 by powdered polypropylene expanded Foam sheet, it is characterised in that institute It is Methacrylamide and cumyl peroxide according to parts by weight 1 to state crosslinking agent:2 component mixing.
  8. 8. the preparation method by powdered polypropylene expanded Foam sheet as described in claim any one of 1-7, its It is characterised by, operating procedure is as follows：
    1）Polypropylene powder, foaming agent, initiator, crosslinking agent, blowing promotor are mixed by weight；
    2）PVA film is tiled, in the uniform one layer of step 1 in PVA film surface）Mixed raw material, one layer of PVA is then covered again Film；
    3）The heat time is controlled to obtain foam sheet for 1-2min under microwave heating condition；
    4）By step 3）The film foam sheet of middle shaping uses pressure extrusion plate extrusion forming；
    5）Trimming, shaping.
  9. 9. as claimed in claim 8 by the preparation method of powdered polypropylene expanded Foam sheet, it is characterised in that The step 2）In uniform one layer of step 1）Mixed raw thickness is controlled in 0.2-0.5cm.
  10. 10. existed as claimed in claim 8 by the preparation method of powdered polypropylene expanded Foam sheet, its feature In the pressure extrusion plate uses 10-20KPa.
CN201710722925.0A 2017-08-22 2017-08-22 It is a kind of by powdered polypropylene expanded Foam sheet and preparation method Pending CN107512056A (en)

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Application Number Priority Date Filing Date Title
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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2530801Y (en) * 2001-10-15 2003-01-15 王宝瑞 Plastics foaming composite material
CN1867437A (en) * 2003-10-17 2006-11-22 有限会社椎名化成 Method for producing plastic foamed composite
CN102858529A (en) * 2010-02-22 2013-01-02 弗特克斯公司 Composite foam product

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2530801Y (en) * 2001-10-15 2003-01-15 王宝瑞 Plastics foaming composite material
CN1867437A (en) * 2003-10-17 2006-11-22 有限会社椎名化成 Method for producing plastic foamed composite
CN102858529A (en) * 2010-02-22 2013-01-02 弗特克斯公司 Composite foam product

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
李大超: "低熔体强度结晶型聚合物CO2发泡过程设计和控制", 《中国博士学位论文全文数据库》 *

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Application publication date: 20171226