CN102729386A - Method for preparing sheet by using waste polystyrene-acrylonitrile foamed plastics and toughening sheet by using polystyrene-acrylonitrile foamed plastics - Google Patents

Method for preparing sheet by using waste polystyrene-acrylonitrile foamed plastics and toughening sheet by using polystyrene-acrylonitrile foamed plastics Download PDF

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Publication number
CN102729386A
CN102729386A CN2012101743159A CN201210174315A CN102729386A CN 102729386 A CN102729386 A CN 102729386A CN 2012101743159 A CN2012101743159 A CN 2012101743159A CN 201210174315 A CN201210174315 A CN 201210174315A CN 102729386 A CN102729386 A CN 102729386A
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China
Prior art keywords
powder
sheet
foamed plastics
tpu film
polystyrene
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CN2012101743159A
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Chinese (zh)
Inventor
刘晓非
吴皓
孟庆颖
彭钦
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天津大学
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Priority to CN2012101743159A priority Critical patent/CN102729386A/en
Publication of CN102729386A publication Critical patent/CN102729386A/en

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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00Technologies relating to chemical industry
    • Y02P20/141Feedstock
    • Y02P20/143Feedstock the feedstock being recycled material, e.g. plastics
    • Y02W30/70

Abstract

The invention provides a method for preparing a sheet by using waste polystyrene-acrylonitrile foamed plastics and toughening the sheet by using the polystyrene-acrylonitrile foamed plastics. The method comprises the following steps: preheating waste polystyrene-acrylonitrile foamed plastic powder at a temperature of 100 to 150 DEG C; adding preheated raw material powder and thermoplastic polyurethane resin film which has been cut in advance into dies and carrying out hot forming, wherein, pressure intensity is 10 to 15 MPa, the temperature of an upper die is 127 to 177 DEG C, the temperature of a lower die is 120 to 170 DEG C, and hot forming lasts for 10 to 20 min; and carrying out low temperature setting on the molded sheet with pressure intensity being 5 to 10 MPa and allowing the sheet to naturally cool. Density, water content, water absorption, impact strength, compression strength, compression modulus, bending strength and bending modulus of the obtained sheet all satisfy application requirements.

Description

Utilize waste polystyrene-acrylonitrile foamed plastics to make sheet material also with polystyrene-toughness reinforcing method of acrylonitrile foamed plastics

Technical field

The present invention relates to utilize waste polystyrene-acrylonitrile foamed plastics to make sheet material, belong to resource and reclaim and utilize again the field also with polystyrene-toughness reinforcing method of acrylonitrile foamed plastics.

Background technology

At present, we have adopted solid epoxy resin and rubber toughened method, and the thermosetting foam plastics of retrieving is prepared into regenerated plates.Through adding elasticity that rubber improved sheet material and toughness, adding solid epoxy resin and improve its intensity and corrosion resistance (preparation method sees in detail: (1) Chinese patent " a kind of plastic material that waste thermosetting foam plastics prepares and preparation method thereof that utilizes ", CN 101629025B; (2) Chinese patent " a kind of method of utilizing waste thermosetting foam plastics to prepare composite board ", application number is 200910305368.8.Though the method has been expanded the cycling and reutilization scope and the approach of thermosetting foam plastics discarded object, solved formaldehyde in the furniture simultaneously and retained the problem with moisture absorption and deformation.But added epoxy hardener in the preparation process, curing agent is an organic amine, and human body has been caused harm.

TPU occupies bigger advantage in polyurethane series with regard to its price and performance.Thermoplastic polyurethane has very broad toughness, uses more and more widely as the one of which.Even they have higher flexibility under cryogenic conditions, and have characteristics such as good oil resistivity, toughness, wearability, resistance to ag(e)ing and cohesive, be widely used in processing modes such as lamination, ejaculation, calendering.Thereby we to select for use the TPU film that regenerated plates is carried out toughness reinforcing, need not curing agent, and obtained than the better toughening effect of epoxy resin.Different according to the applying position of TPU film in the middle of composite board, can obtain the toughness reinforcing sheet material of TPU film of different structure, wherein our structure mainly studied comprises sandwich structure, core shell structure, surface texture.Process is to the Mechanics Performance Testing of the toughness reinforcing sheet material of TPU film of different structure, and water absorption rate is tested, anti corrosion test; Show the toughness reinforcing sheet material of our resulting TPU films in anti-bending strength, shock resistance, anti-impact is pressed performance; Discharging water property also has corrosion resistance all to obtain remarkable lifting, and the method is safe and reliable, nontoxic pollution-free; Be to reclaim a kind of economically viable effective way of thermosetting foam plastics; The sheet material of processing can also be used to manufacture furniture, and testing stand etc. are with a wide range of applications

Summary of the invention

The object of the present invention is to provide discardedly for the processing method of polystyrene-acrylonitrile foamed plastics and prepare the method for regenerated plates,, and can improve the toughness of regenerated plates for the cycling and reutilization waste thermosetting foam plastics provides an approach.

Technical scheme of the present invention is following:

Utilize waste polystyrene-acrylonitrile foamed plastics to make sheet material, it is characterized in that, carry out according to following step:

(1) waste polystyrene-acrylonitrile foamed plastics powder is carried out preheating under 100 ~ 150 ℃;

(2) with the material powder after the preheating with cut out in advance good TPU film and join in the mould, carry out hot-formingly, wherein pressure is 10-15MPa, temperature is: 127 ~ 177 ℃ of patrix temperature, 120 ~ 170 ℃ of counterdie temperature, the time is 10-20min;

(3) sheet material after the moulding is carried out low-temperature shaped, wherein pressure is 5-10MPa, naturally cooling.

Said mould specification is that inner chamber is the rectangle of 1.2m * 2.44m * 1.5cm.

Make the method for sheet material with the toughness reinforcing waste polystyrene of TPU film-acrylonitrile foamed plastics; It is characterized in that adding successively waste polystyrene-acrylonitrile foamed plastics powder 80-90 mass parts, plasticizer phthalic acid dibutyl ester or chlorinated paraffin wax 5-10 mass parts, fire retardant 2-7 mass parts, pigment carbon black or iron black 0-3 mass parts, promptly get material powder after mixing.

Before waste polystyrene-acrylonitrile foamed plastics powder mixes, be 15-25 minute preheating time.

It is 0.2 ~ 0.6mm that the TPU film adopts thickness, cuts out big or small consistent with the dies cavity size; The order that adds material powder and TPU film has three kinds:

Earlier layer overlay TPU film in mould adds the material powder that all takes by weighing again, powder is paved, on cover one deck TPU film;

Or

Add now the half the of the material powder that takes by weighing in the mould, powder paved, on cover one deck TPU film, on the TPU film of completing, add in addition half material powder and pave;

Or

In grinding tool, add whole material powders, powder is paved, again layer overlay TPU film in the above.

Figure of description

Fig. 1: the two layers of resin film is the profile of hot pressing about sheet material respectively;

Fig. 2: the profile of one deck resin molding hot pressing in the middle of sheet material;

Fig. 3: the hot pressing of one deck resin molding is at the planing surface figure of plate surface.

The specific embodiment

Embodiment one

(1) take by weighing waste thermosetting polystyrene-acrylonitrile foamed plastics powder 80 mass parts, press mould specification 1.2m * 2.44m * 1.5cm, and the cutting urethane resin film (1.2m * 2.44m);

(2) in mixer, add waste thermosetting polystyrene-acrylonitrile foamed plastics powder, dioctyl phthalate 10 mass parts, 2 successively; 2-two bromomethyls-3-bromopropyl phosphonates 3 mass parts, iron black 2 mass parts add a kind of auxiliary agent down more successively after the aforementioned a kind of auxiliary agent of wherein every adding all will mix by the time;

(3) with promptly getting material powder after step (2) mixing;

(4) press the panel density volume 0.04392 raw materials weighing powder 65.88kg of 1500kg, with the material powder preheating, 140 ℃ of temperature, time 15min;

(5) hot-forming, respectively spread one deck urethane resin film at the upper and lower surfaces of mould, between material powder is layered on wherein; Be that urethane resin film is positioned at material powder upper and lower surfaces (see figure 1), pressure is 12.5MPa, and temperature is: 157 ℃ of patrix temperature; The counterdie temperature: 150 ℃, the time is 20min;

(6) low-temperature shaped, pressure is 10MPa, naturally cooling;

(7) sheet material of preparation is sawed limit, sanding, process standard-sized finished product sheet material.

Wherein waste thermosetting polystyrene-acrylonitrile foamed plastics powder is 100 order powder, and the gained panel density is 1500kg/m 3, moisture content is 0.25%, and water absorption rate is 6.66%, and water sucting thickness limit expansion rate is 1.40%, and impact strength is 53kJ/m 2, compression strength is 67.457MPa, and compression modulus is 752.482MPa, and bending strength is 291.90MPa, and composite bending modulus is 3.45 * 10 6MPa.

Embodiment two

(1) take by weighing waste thermosetting polystyrene-acrylonitrile foamed plastics powder 85 mass parts, press mould specification 1.2m * 2.44m * 1.5cm, and the cutting urethane resin film (1.2m * 2.44m);

(2) in mixer, add waste thermosetting polystyrene-acrylonitrile foamed plastics powder, chlorinated paraffin wax 7 mass parts, two phosphonates 4 mass parts of resorcinol, iron black 1 mass parts successively, add a kind of auxiliary agent down after the aforementioned a kind of auxiliary agent of wherein every adding all will mix by the time more successively;

(3) with promptly getting material powder after step (2) mixing;

(4) press 1000kg/m 3Panel density volume 0.04392m 3Raw materials weighing powder 43.92kg, with the material powder preheating, 120 ℃ of temperature, time 12min;

(5) hot-forming, material powder is layered in the mould, in the middle layer overlay urethane resin film of material powder (see figure 2), pressure is 12MPa then, the mould temperature is: 147 ℃ of patrix temperature, 140 ℃ of counterdie temperature, the time is 12min;

(6) low-temperature shaped, pressure is 10MPa;

(7) sheet material of preparation is sawed limit, sanding, process standard-sized finished product sheet material.

Wherein waste thermosetting polystyrene-acrylonitrile foamed plastics powder is 50 order powder, and the gained panel density is 1000kg/m 3, moisture content is 0.13%, and water absorption rate is 2.94%, and water sucting thickness limit expansion rate is 1.07%, and impact strength is 35kJ/m 2, compression strength is 46.734MPa, and compression modulus is 654.196MPa, and bending strength is 276.499MPa, and composite bending modulus is 4.32 * 10 6MPa.

Implement sharp three (1) and take by weighing waste thermosetting polystyrene-acrylonitrile foamed plastics powder 80 mass parts, press mould specification 1.2m * 2.44m * 1.5cm, and the cutting urethane resin film (1.2m * 2.44m);

(2) in mixer, add waste thermosetting polystyrene-acrylonitrile foamed plastics powder, chlorinated paraffin wax 8 mass parts, tricresyl phosphate phenol 2 mass parts successively, add a kind of auxiliary agent down after the aforementioned a kind of auxiliary agent of wherein every adding all will mix by the time more successively;

(3) with promptly getting material powder after step (2) mixing;

(4) by 1200 panel density volume 0.04392 raw materials weighing powder 52.7kg, with the material powder preheating, 150 ℃ of temperature, time 10min;

It is (5) hot-forming,, material powder is layered in the mould, layer overlay urethane resin film (see figure 3) on material powder then, pressure is 10MPa, the mould temperature is: 177 ℃ of patrix temperature, 170 ℃ of counterdie temperature, the time is 10min;

(6) low-temperature shaped, pressure is 10MPa, naturally cooling;

(7) sheet material of preparation is sawed limit, sanding, process standard-sized finished product sheet material.

Wherein waste thermosetting polystyrene-acrylonitrile foamed plastics powder is 80 order powder, and the gained panel density is 1200kg/m 3, moisture content is 0.25%, and water absorption rate is 3.05%, and water sucting thickness limit expansion rate is 1.60%, and impact strength is 40kJ/m 2, compression strength is 61.285MPa, and compression modulus is 681.679MPa, and bending strength is 108.118MPa, and composite bending modulus is 2.16 * 10 5MPa.

More than the present invention has been done exemplary description; Authority of the present invention is limited claim; Under the situation that does not break away from core of the present invention, any simple distortion, revise or other those skilled in the art can not spend creative work is equal to replacement all within protection scope of the present invention.

Claims (5)

1. utilize waste polystyrene-acrylonitrile foamed plastics to make sheet material, it is characterized in that, carry out according to following step:
(1) waste polystyrene-acrylonitrile foamed plastics powder is carried out preheating under 100 ~ 150 ℃;
(2) with the material powder after the preheating with cut out in advance good TPU film and join in the mould, carry out hot-formingly, wherein pressure is 10-15MPa, temperature is: 127 ~ 177 ℃ of patrix temperature, 120 ~ 170 ℃ of counterdie temperature, the time is 10-20min;
(3) sheet material after the moulding is carried out low-temperature shaped, wherein pressure is 5-10MPa, naturally cooling.
2. sheet material according to claim 1 is characterized in that said mould specification is that inner chamber is the rectangle of 1.2m * 2.44m * 1.5cm.
3. make the method for sheet material with the toughness reinforcing waste polystyrene of TPU film-acrylonitrile foamed plastics; It is characterized in that adding successively waste polystyrene-acrylonitrile foamed plastics powder 80-90 mass parts, plasticizer phthalic acid dibutyl ester or chlorinated paraffin wax 5-10 mass parts, fire retardant 2-7 mass parts, pigment carbon black or iron black 0-3 mass parts, promptly get material powder after mixing.
4. method according to claim 3 is characterized in that, before waste polystyrene-acrylonitrile foamed plastics powder mixes, be 15-25 minute preheating time.
5. method according to claim 3 is characterized in that, it is 0.2 ~ 0.6mm that the TPU film adopts thickness, cuts out big or small consistent with the dies cavity size; The order that adds material powder and TPU film has three kinds:
Earlier layer overlay TPU film in mould adds the material powder that all takes by weighing again, powder is paved, on cover one deck TPU film;
Or
Add now the half the of the material powder that takes by weighing in the mould, powder paved, on cover one deck TPU film, on the TPU film of completing, add in addition half material powder and pave;
Or
In grinding tool, add whole material powders, powder is paved, again layer overlay TPU film in the above.
CN2012101743159A 2012-05-31 2012-05-31 Method for preparing sheet by using waste polystyrene-acrylonitrile foamed plastics and toughening sheet by using polystyrene-acrylonitrile foamed plastics CN102729386A (en)

Priority Applications (1)

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CN2012101743159A CN102729386A (en) 2012-05-31 2012-05-31 Method for preparing sheet by using waste polystyrene-acrylonitrile foamed plastics and toughening sheet by using polystyrene-acrylonitrile foamed plastics

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CN2012101743159A CN102729386A (en) 2012-05-31 2012-05-31 Method for preparing sheet by using waste polystyrene-acrylonitrile foamed plastics and toughening sheet by using polystyrene-acrylonitrile foamed plastics

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1275594A (en) * 1999-05-26 2000-12-06 武建民 Polyurethane, polystyrene foam composite material
CN101633225A (en) * 2009-08-07 2010-01-27 天津大学 Method for preparing composite board by waste thermosetting foamed plastics
CN102229727A (en) * 2011-05-23 2011-11-02 天津大学 Processing method of waste polystyrene-acrylonitrile foamed plastics, and method for preparing recycled sheet material

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1275594A (en) * 1999-05-26 2000-12-06 武建民 Polyurethane, polystyrene foam composite material
CN101633225A (en) * 2009-08-07 2010-01-27 天津大学 Method for preparing composite board by waste thermosetting foamed plastics
CN102229727A (en) * 2011-05-23 2011-11-02 天津大学 Processing method of waste polystyrene-acrylonitrile foamed plastics, and method for preparing recycled sheet material

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Application publication date: 20121017