CN1237126A

CN1237126A - Method of recycling package-cushioning material, and pellets and injection-molded articles made therefrom

Info

Publication number: CN1237126A
Application number: CN98801209A
Authority: CN
Inventors: 金仲镐
Original assignee: Samsung Electronics Co Ltd
Current assignee: Samsung Electronics Co Ltd
Priority date: 1997-08-28
Filing date: 1998-08-27
Publication date: 1999-12-01
Also published as: KR100266290B1; JP2000505753A; EP0941156A1; WO1999011445A1; AU9004898A; KR19990023168A

Abstract

Package-cushioning material are recycled by the steps of: recycling waste PS foam into recycled PS pellets; recycling waste copolymerized PE + PS foam into recycled PE + PS pellets; mixing the recycled PS pellets and the PE + PS pellets; extruding the mixed pellets into recycled mixed pellets; and cutting the mixed recycled pellets extruded at the extruding process to predetermined sizes.

Description

The recovery method of package-cushioning material, and pellet and by the injection molded goods of this pellet

Invention field

The present invention relates to the recovery of package-cushioning material, for example form the material of PS (polystyrene) foams or form the copolymerization material that PE (polyethylene) adds PS.

Description of the Prior Art

Environmental pollution has at present formed a serious problem, therefore people pay much attention to and collect the exhausted package-cushioning material how effectively and handle most Recycled materials or goods for the purpose of environmental protection, and its method is to reduce original the plan amount of buried or the synthesising packing material that burns and the natural resources that saving is used to make the new plastic goods.

Generally speaking, have only depleted PS to be collected and to reclaim and mix with new high quality polystyrene (HIPS) and to make window and picture frame.Yet other package-cushioning material but is left out as the PE+PS foams and the PE foams of copolymerization in recovery, because find that in reclaiming industry PE+PS and PE are difficult to processing.The resin of known PE and PS can not compatibly mix, and the time spent people generally believe that the mixture of PE and PS resin is impossible.

The PE+PS foams goods of copolymerization and PE foams goods difficulty in removal process are bigger, because PE+PS and PE foams or PE foams and be of little use, and the fusing point of PE is higher than PS.Therefore, the PE+PS foams waste material of copolymerization and PE foams also seldom are collected and are used for reclaiming.But, consider the environmental problem that burning brought of handling means as a kind of to plastic waste material, aspect the recovery method of these plastic waste, be necessary to do more research in exploitation.

Because its higher in transit reliability and validity, use to the PE+PS package-cushioning material is becoming more and more general always, this should be owing to the PE+PS of the copolymerization better physical propertys such as weather resistance in shock absorption, elasticity, recycling, but also should be owing to its volume that accounts for when packing increases still less thereby reduced this advantage of trucking costs.Therefore, since use more and morely as a kind of package-cushioning material, just be necessary to develop the method that a kind of new PE+PS to copolymerization reclaims to PE+PS.

The invention summary

Open the present invention is to solve the above problems and one of purpose of the present invention provides a kind of method of the cushioning material that is recycled and packaged.Another object of the present invention provides the method for foams package-cushioning material that a kind of recovery comprises the copolymerization of polyethylene (PE) and polystyrene (PS).A further object of the present invention provides and a kind ofly comprises the pellet that the method for the foams package-cushioning material of PE and PS copolymerization forms by recovery; And provide the injection-molded item that forms by this pellet.

According to purpose of the present invention, the method that it provides a kind of cushioning material that is recycled and packaged comprises step:

Reclaim depleted PS foams and make the PS pellet of recovery;

Reclaim depleted copolymerization PE+pS foams and make the PE+PS pellet of recovery;

The PS pellet that reclaims and PE+PS pellet are mixed with new PS pellet;

The blended pellet is extruded into the mixing pellet of recovery;

In with predetermined extrusion molding processing, the pellet chopping is reclaimed in the mixing of extrusion molding.

Brief Description Of Drawings

Essence for a more complete understanding of the present invention and purpose should be with reference to following detailed description and while reference accompanying drawings wherein;

Fig. 1 is the recovery process figure of the package-cushioning material consistent with the present invention.

The detailed description of the preferred embodiment of the invention

Recovery method of the present invention will be described in detail with reference to figure 1.At first, the synthetic package-cushioning material is used for preventing that article are damaged in transportation.After the article transportation is finished, generally exhausted package-cushioning material and article can be separated also then and be handled.

In reclaiming industry, these depleted plastic wrapping backings are collected and it is categorized into various waste types, be i.e. the PE (polyethylene) of paper, ethenoid resin, PS (polystyrene) foams and copolymerization+PS (polystyrene) foams.Depleted PE+PS foams are processed continuously through series of steps, or step 20, be referred to as to pulverize 30 → fusion (promptly liquefying 40) → blank and form (ingoting) 50 extrusion moldings 60 (after another fusion step) → pellet chopping 70,80, with the PS pellet 70 of preparation recovery respectively and the PE+PS pellet 80 that reclaims.

Then, the PS pellet 70 that reclaims and PE+PS pellet 80 and new high quality P S pellet 90 are mixed with predetermined ratio: the PS that 10-40% reclaims, the PE+PS of 30-40% recovery; And the new PS of 40-50%.As shown in Figure 1, most preferred ratio is 30%: 30%: 40%.Then should mix pellet 100 at the fusion of 110 places and extrusion molding with preparation regenerated mixings pellet 120, continue it is proceeded to injection moulding processing 130 to obtain being used as the final regenerative mixed product 140 of raw material.

Preferably after separating step 10, before reclaiming processing 20, depleted synthesising packing cushioning material is carried out drying by drying process 150.

Also preferably in hybrid process 100, with the PS pellet 70 that reclaims, the PE+PS pellet 80 of recovery and new HIPS pellet 90 for similar size and thorough mixing to guarantee the uniformity of final regenerated mix products.

And, when the PS pellet 70 that reclaims, the PE+PS pellet 80 that reclaims and new HIPS pellet 90 mix, can add some pigment (for example titanium, carbon or its mixture) if necessary to form color from white to the black degree of depth at different levels in mixing section 100.

In injection moulding processing 130, under 160-200 ℃ temperature, the mixing pellet 120 that reclaims should be carried out injection moulding to stop its burning and to keep its predetermined color.

Therefore, we find by inciting somebody to action: (ⅰ) PS of Hui Shouing (ⅱ) PS+PE mixes with best ratio with (ⅲ) new PS, and recovery method of the present invention can be used for producing regenerated functional material 140 effectively.Table 1 has been listed the regenerating functional material and has been better than the physical property that traditional ABS resin or new HIPS resin improve.

Table 1 is according to the mensuration of the physical property of the various sinteticses of ASTM

Test		Unit	The packaging cushion resin that reclaims			?ABS (VH-0810)	New HIPS (HR-1360)
			The packaging cushion resin that reclaims					Discarded PS: discarded PS+ PE: the mixture ratio of HIPS pellet
			2∶4∶4	?3∶3∶4	?1∶4∶5						Novel material	Novel material
			2∶4∶4	?3∶3∶4	?1∶4∶5	Tensile strength		kg/cm ²	?324	?323	Novel material	Novel material	?303	????420	?320
Flexural strength		kg/cm ²	?408.2	?414.9	?388.5	Tensile strength		kg/cm ²	?324	?323	????600	?360	?303	????420	?320
Flexural strength		kg/cm ²	?408.2	?414.9	?388.5	The flexing elasticity ratio		kg/cm ²	?18720	?19790	????600	?360	?16900	?24,000	?17,600
Elongation		％	?47	?47	?58	The flexing elasticity ratio		kg/cm ²	?18720	?19790	????-	???-	?16900	?24,000	?17,600
Elongation		％	?47	?47	?58	Impact	3.2mm	kg.cm/cm	?5.75	?5.15	????-	???-	?6.7	????19	????10
?6.4mm	kg.cm/cm	?4.3	?4.1	?4.8	????-		3.2mm	kg.cm/cm	?5.75	?5.15	????-		?6.7	????19	????10
?6.4mm	kg.cm/cm	?4.3	?4.1	?4.8	????-		Melting index		The g/10 branch	?10.48	????-	?13.65	?9.33	????5.5	????3.8
Heat-drawn wire		℃	?77.1	?80.0	?78.2	????76	Melting index		The g/10 branch	?10.48	????78	?13.65	?9.33	????5.5	????3.8
Heat-drawn wire		℃	?77.1	?80.0	?78.2	????76	Hardness		R	?99.3	????78	?102.5	?96.4	????100	????112

Reclaim pellet and many advantages are arranged from package-cushioning material, the blended of the next recovery of aforesaid method by the injection moulded products that it forms, according to the present invention since depleted PS material and PE+PS material mix with generation regenerated mixing material with optimal ratio with new HIPS material, mould the pollution of goods thereby reduced, saved natural resources and new functional product is provided environment by burying or burning.

Though the present invention is described with an embodiment preferred, those skilled in the art can carry out not specifically described increase, minimizing, modification and replacement under the prerequisite of the spirit and scope of the present invention that do not depart from additional claim and limited.

Claims

1. the be recycled and packaged method of cushioning material comprises step:

A: reclaim depleted PS foam and make the PS pellet of recovery;

B: reclaim depleted copolymerization PE+PS foam and make the PE+PS pellet of recovery;

C: the PS pellet that reclaims and PE+PS pellet are mixed with new PS pellet;

D: the mixing pellet that the blended pellet is extruded into recovery; With

E: the blended of extrusion molding among the step D is reclaimed the pellet chopping to pre-sizing.

2. the method that claim 1 limited, it carries out drying by removing all residual water-contents from it with depleted PS foam and depleted copolymerization PE+PS foam before further being included in steps A and B.

3. the method that claim 1 limited, wherein the PS+PE pellet of the recovery among the step C and new PS pellet is big or small basic identical.

4. the method that claim 1 limited, wherein in step C with the PS pellet that reclaims, PE+PS pellet and new PS pellet respectively with 10-40%, the ratio of 30-40% and 40-50% mixes.

5. the method that claim 1 limited is wherein mixed the PS pellet that reclaims, PE+PS pellet and new PS pellet respectively in step C with 30%, 30% and 40% ratio.

Claim 1 the qualification method, wherein each steps A and B comprise broken each waste foam body, the broken foams of liquefaction, the foams of extrusion molding fragmentation, and make the waste foam body granulating of extrusion molding.

7. the method that claim 1 limited wherein adds pigment in step C.

8. the method that claim 7 limited, wherein the pigment of Jia Ruing is titanium.

9. the method that claim 7 limited, wherein the pigment of Jia Ruing is carbon.

10. the method that claim 7 limited, wherein the pigment of Jia Ruing is the mixture of titanium and carbon.

11. the pellet that forms by following steps:

A: reclaim depleted PS foams and make the PS pellet of recovery;

B: reclaim depleted copolymerization PE+PS foams and make the PE+PS pellet of recovery;

C: the PS pellet that reclaims and PE+PS pellet are mixed with new PS pellet;

D: the mixing pellet that the blended pellet is extruded into recovery; With

12. the goods that form by following steps:

A: reclaim depleted PS foams and make the PS pellet of recovery;

C: the PS pellet that reclaims and PE+PS pellet are mixed with new PS pellet;

D: the mixing pellet that the blended pellet is extruded into recovery;

E: the blended of extrusion molding among the step D is reclaimed the pellet chopping to pre-sizing; And

F: with the pellet injection mould that shreds in the step e is goods.

13. the desired goods of claim 12, wherein step F is carried out in 160-200 ℃ temperature range.