CN102229727A - Processing method of waste polystyrene-acrylonitrile foamed plastics, and method for preparing recycled sheet material - Google Patents

Processing method of waste polystyrene-acrylonitrile foamed plastics, and method for preparing recycled sheet material Download PDF

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Publication number
CN102229727A
CN102229727A CN 201110134295 CN201110134295A CN102229727A CN 102229727 A CN102229727 A CN 102229727A CN 201110134295 CN201110134295 CN 201110134295 CN 201110134295 A CN201110134295 A CN 201110134295A CN 102229727 A CN102229727 A CN 102229727A
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China
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powder
raw
polystyrene
mass parts
temperature
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CN 201110134295
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Chinese (zh)
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刘晓非
支晓娜
杨帆
刘运飞
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天津大学
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Publication of CN102229727A publication Critical patent/CN102229727A/en

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Abstract

The invention relates to a processing method of waste polystyrene-acrylonitrile foamed plastics, and a method for preparing a recycled sheet material. According to the invention, 80 to 90 parts by mass of waste polystyrene-acrylonitrile foamed plastic powder, 5 to 10 parts by mass of a plasticizer of dioctyl phthalate or chlorinated paraffin, 2 to 7 parts by mass of a fire retardant, and 0 to 3 parts by mass of a pigment of carbon black or iron black are sequentially added to a mixer, wherein each auxiliary agent is added after previous materials are well-mixed. The materials are well-mixed, such that raw material powder is obtained. Waste thermoset polystyrene-acrylonitrile foamed plastic is adopted as a raw material, and a resin film is applied above or in the middle of the raw material. Waste thermoset polystyrene-acrylonitrile foamed plastic has a high strength but a high brittleness, however, the added resin film contributes to a physical and chemical cross-linking effect, therefore toughness of the system is improved, and strength and corrosion resistance of the material is improved. According to the invention, no additional adhesive is needed, and no solvent or formaldehyde is contained. The material is safe and environment protecting, and has wide application prospect.

Description

Discarded for the treatment process of polystyrene-vinyl cyanide porous plastics and prepare the method for regenerated plates

Technical field

The present invention relates to discardedly for the treatment process of polystyrene-vinyl cyanide porous plastics and prepare the method for regenerated plates, belong to the resource recovery and utilize the field again.

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.Improved the elasticity of sheet material and toughness, adding solid epoxy resin and improve its intensity and erosion resistance (preparation method sees in detail: (1) Chinese patent " a kind of plastic material that utilizes the waste thermosetting foam plastics preparation and preparation method thereof ", CN 101629025 B by adding rubber; (2) Chinese patent " a kind of method of utilizing waste thermosetting foam plastics to prepare composite sheet ", application number is 200910305368.8.Though this method has been expanded the cycling and reutilization scope and the approach of thermosetting foam plastics waste, solved formaldehyde in the furniture simultaneously and retained problem with moisture absorption and deformation.But added epoxy hardener in the preparation process, solidifying agent is an organic amine, and human body has been caused harm.

TPU(Thermoplastic polyurethanes) is occupied bigger advantage in urethane series with regard to its price and performance.Thermoplastic polyurethane has very broad toughness, its general application more and more widely.Even they have higher flexibility under cold condition, and have characteristics such as good oil-proofness, toughness, wear resistance, ageing resistance and binding property, be widely used in processing modes such as lamination, ejaculation, calendering.Thereby we to select for use the TPU(Thermoplastic polyurethanes) film that regenerated plates is carried out toughness reinforcing, need not solidifying agent, and obtained than the better toughening effect of Resins, epoxy.

Summary of the invention

The object of the present invention is to provide discardedly for the treatment process of polystyrene-vinyl cyanide porous 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.

The discarded treatment process of polystyrene-vinyl cyanide porous plastics that is of the present invention, in stirrer, add waste polystyrene-vinyl cyanide porous plastics powder 80-90 mass parts, plasticizer phthalic acid dibutyl ester or clorafin 5-10 mass parts, fire retardant 2-7 mass parts, pigment carbon black or iron black 0-3 mass parts successively, add a kind of auxiliary agent down after every kind of auxiliary agent of wherein every adding all will mix by the time more successively; Promptly get raw material powder after mixing.

Described waste thermosetting foam plastics powder is a 20-100 order powder.

Described fire retardant is brominated epoxy resin, tricresyl phosphate phenol, 2, a kind of in 2-two brooethyls-3-bromopropyl phosphoric acid ester or the Resorcinol biphosphonate.

Discarding that the present invention adopts prepares the method for regenerated plates for polystyrene-vinyl cyanide porous plastics, it is characterized in that:

(1) raw materials weighing powder carries out preheating under 100-150 ℃;

(2) evenly be taped against the raw material powder after the preheating in the mould, simultaneously below mould above or spread urethane resin film in the middle of the raw material and 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 10MPa, naturally cooling.

The raw material powder that the present invention uses mainly utilizes waste thermosetting polystyrene-vinyl cyanide porous plastics to be raw material, surface or centre add resin molding, because the intensity height of depleted thermosetting foam plastics but fragility is big own, the adding of resin molding can be played the crosslinked action of storeroom physical chemistry, thereby strengthen the toughness of system, and can improve the intensity and the erosion resistance of material.The present invention need not add sizing agent, and is solvent-free formaldehydeless, and safety and environmental protection is with a wide range of applications.

Figure of description

The sectional view of Fig. 1: embodiment 1 one deck resin molding hot pressing on sheet material;

Fig. 2: embodiment 2 one deck resin molding hot pressing are at sheet material intermediary sectional view;

Fig. 3: embodiment 3 two layers of resin film hot pressing are at sheet material intermediary sectional view;

Fig. 4: embodiment 4 two layers of resin films are the sectional view of hot pressing about sheet material respectively;

Wherein: 1 is the fine porous plastics of polystyrene-propylene, and 2 is the TPU(Thermoplastic polyurethanes) film.

Embodiment

Further specify technical scheme of the present invention below in conjunction with specific embodiment.

Embodiment 1

(1) take by weighing waste thermosetting polystyrene-vinyl cyanide porous plastics powder 90 mass parts, press mould specification 1.2m * 2.44m * 1.5cm, and the cutting urethane resin film (1.2m * 2.44m);

(2) in stirrer, add waste thermosetting polystyrene-vinyl cyanide porous plastics powder, dioctyl phthalate (DOP) 5 mass parts, brominated epoxy resin 7 mass parts, carbon black 3 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) will promptly get raw material powder after step (2) mixing;

(4) press 1400kg/m 3Panel density volume 0.04392m 3Raw materials weighing powder 61.48kg, with the raw material powder preheating, 100 ℃ of temperature, time 10min;

(5) hot-forming, raw material powder is layered in the mould, then shop one deck urethane resin film (see figure 1) on powder, the thickness of urethane resin film is 0.6mm, and pressure is 15MPa, and the mould temperature is: 127 ℃ of patrix temperature, 120 ℃ of counterdie temperature, the time is 15min;

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

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

Wherein waste thermosetting polystyrene-vinyl cyanide porous plastics powder is 20 order powder, and the gained panel density is 1400kg/m 3, water ratio is 0.54%, and water-intake rate is 2.64%, and water sucting thickness limit rate of expansion is 0.73%, and shock strength is 42kJ/m 2, ultimate compression strength is 49.173MPa, and compression modulus is 703.227MPa, and bending strength is 59.935MPa, and composite bending modulus is 1.27 * 10 6MPa.

Embodiment 2

(1) take by weighing waste thermosetting polystyrene-vinyl cyanide porous 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 stirrer, add waste thermosetting polystyrene-vinyl cyanide porous plastics powder, clorafin 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) will promptly get raw material powder after step (2) mixing;

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

(5) hot-forming, raw material powder is layered in the mould, in the middle layer overlay urethane resin film of raw 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, make standard-sized finished product sheet material.

Wherein waste thermosetting polystyrene-vinyl cyanide porous plastics powder is 50 order powder, and the gained panel density is 1000kg/m 3, water ratio is 0.13%, and water-intake rate is 2.94%, and water sucting thickness limit rate of expansion is 1.07%, and shock strength is 35kJ/m 2, ultimate 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.

Embodiment 3

(1) take by weighing waste thermosetting polystyrene-vinyl cyanide porous 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 stirrer, add waste thermosetting polystyrene-vinyl cyanide porous plastics powder, clorafin 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) will promptly get raw material powder after step (2) mixing;

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

(5) hot-forming, raw material powder is layered in the mould, in the middle of raw material powder, spread two-layer urethane resin film (see figure 3) 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, make standard-sized finished product sheet material.

Wherein waste thermosetting polystyrene-vinyl cyanide porous plastics powder is 80 order powder, and the gained panel density is 1200kg/m 3, water ratio is 0.25%, and water-intake rate is 3.05%, and water sucting thickness limit rate of expansion is 1.60%, and shock strength is 40kJ/m 2, ultimate 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.

Embodiment 4

(1) take by weighing waste thermosetting polystyrene-vinyl cyanide porous 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 stirrer, add waste thermosetting polystyrene-vinyl cyanide porous plastics powder, dioctyl phthalate (DOP) 10 mass parts, 2 successively, 2-two brooethyls-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) will promptly get raw material powder after step (2) mixing;

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

(5) hot-forming, respectively spread one deck urethane resin film in the upper and lower surface of mould, raw material powder is layered in the middle of it, be that urethane resin film is positioned at raw material powder upper and lower surface (see figure 4), 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, make standard-sized finished product sheet material.

Wherein waste thermosetting polystyrene-vinyl cyanide porous plastics powder is 100 order powder, and the gained panel density is 1500kg/m 3, water ratio is 0.25%, and water-intake rate is 6.66%, and water sucting thickness limit rate of expansion is 1.40%, and shock strength is 53kJ/m 2, ultimate 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.

Need to prove pressing plate equipment used constant volume, thus can be according to required panel density, and the raw materials weighing powder can obtain desired density sheet material.

More than the present invention has been done exemplary description; authority of the present invention is limited by claim; under the situation that does not break away from core of the present invention, what any simple distortion, modification 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 (4)

1. discard is the treatment process of polystyrene-vinyl cyanide porous plastics, it is characterized in that: in stirrer, add waste polystyrene-vinyl cyanide porous plastics powder 80-90 mass parts, plasticizer phthalic acid dibutyl ester or clorafin 5-10 mass parts, fire retardant 2-7 mass parts, pigment carbon black or iron black 0-3 mass parts successively, add a kind of auxiliary agent down after every kind of auxiliary agent of wherein every adding all will mix by the time more successively; Promptly get raw material powder after mixing.
2. the method for claim 1 is characterized in that described waste thermosetting foam plastics powder is a 20-100 order powder.
3. the method for claim 1 is characterized in that described fire retardant is brominated epoxy resin, tricresyl phosphate phenol, 2, a kind of in 2-two brooethyls-3-bromopropyl phosphoric acid ester or the Resorcinol biphosphonate.
4. adopt the discarded of claim 1 to prepare the method for regenerated plates, it is characterized in that for polystyrene-vinyl cyanide porous plastics:
(1) raw materials weighing powder carries out preheating under 100-150 ℃;
(2) evenly be taped against the raw material powder after the preheating in the mould, simultaneously below mould above or spread urethane resin film in the middle of the raw material and 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 10MPa, naturally cooling.
CN 201110134295 2011-05-23 2011-05-23 Processing method of waste polystyrene-acrylonitrile foamed plastics, and method for preparing recycled sheet material CN102229727A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102729386A (en) * 2012-05-31 2012-10-17 天津大学 Method for preparing sheet by using waste polystyrene-acrylonitrile foamed plastics and toughening sheet by using polystyrene-acrylonitrile foamed plastics
CN103213232A (en) * 2013-03-29 2013-07-24 天津大学 Method for toughening and manufacturing thermosetting foamed plastic composite board by utilizing polyurethane resin film

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070260015A1 (en) * 2004-08-10 2007-11-08 Basf Aktiengesellschaft Thermoplastic Molding Compounds with Improved Properties with Regard to Flow and Demolding
CN101629025A (en) * 2009-08-07 2010-01-20 天津大学 Plastic material prepared by using waste thermosetting foam plastics and preparation method thereof
CN101633225A (en) * 2009-08-07 2010-01-27 天津大学 Method for preparing composite board by waste thermosetting foamed plastics

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070260015A1 (en) * 2004-08-10 2007-11-08 Basf Aktiengesellschaft Thermoplastic Molding Compounds with Improved Properties with Regard to Flow and Demolding
CN101629025A (en) * 2009-08-07 2010-01-20 天津大学 Plastic material prepared by using waste thermosetting foam plastics and preparation method thereof
CN101633225A (en) * 2009-08-07 2010-01-27 天津大学 Method for preparing composite board by waste thermosetting foamed plastics

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102729386A (en) * 2012-05-31 2012-10-17 天津大学 Method for preparing sheet by using waste polystyrene-acrylonitrile foamed plastics and toughening sheet by using polystyrene-acrylonitrile foamed plastics
CN103213232A (en) * 2013-03-29 2013-07-24 天津大学 Method for toughening and manufacturing thermosetting foamed plastic composite board by utilizing polyurethane resin film

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