KR20020096168A - Recycled Polyvinylchloride/Polyethylene Blends - Google Patents

Abstract

PURPOSE: A waste PVC/PE-based polymer mixture is provided, to minimize the phase separation between the waste PVC and the waste PE by employing a specific copolymer, thereby improving the mechanical properties. CONSTITUTION: The waste PVC/PE-based polymer mixture comprises 100 parts by weight of waste plastic; 0.1-20 parts by weight of a copolymer having 30-99 wt% of a main chain of an ethylene bond and 1-70 wt% of a side chain of an ester group, an acetate group or an acryl group, as a compatibilizer; and optionally 0.01-3 parts by weight of a lubricant, 0.01-5 parts by weight of a stabilizer, and 0.01-1 parts by weight of an antioxidizing agent. The waste plastic comprises 1-99 parts by weight of waste poly(vinyl chloride); and 1-99 wt% of polyethylene; and the waste PVC is a hard PVC, a soft PVC or their mixture. The mixture also contains new PVC and PC instead of the waste PVC and the waste PE.

Description

Recycled Polyvinylchloride / Polyethylene Blends

The present invention relates to a waste PVC / PE-based polymer mixture, and more particularly, by containing a specific copolymer in waste plastic mainly containing waste PVC and waste PE, thereby preventing phase separation between the different resins of waste PVC and waste PE. The present invention relates to a waste PVC / PE-based polymer mixture which can be manufactured into high quality recycled materials by minimizing and improving mechanical properties.

Currently, plastics are used for various purposes such as construction, electricity, electronics, aviation, space materials, as well as daily necessities, and their usage is increasing. It is desirable to recycle such plastics after use in terms of economics and environmental protection, and the demand for recycling waste plastics is increasing day by day, and in particular, a large amount of polyolefin-based resins that are easily regenerated are being recycled.

However, polyvinyl chloride (PVC) is used in the world after polyethylene (PE) and polypropylene (PP), but the amount is almost incinerated or landfilled after recycling. The reason for this is that waste PVC has a low thermal stability during reprocessing, which leads to a decrease in the value of the product by causing a decrease in physical properties and yellowing, and even when recycled, it is used only as a low-grade extruded product. In particular, most of them are incinerated or buried when mixed with other kinds of resins. However, incineration also causes toxic chlorine gas due to the decomposition of its own materials, which may cause environmental pollution. Korean Patent Publication No. 97-5557 removes various foreign matters from synthetic resin such as waste wire coating or composite waste vinyl, and the composition ratio of waste resin is 50% of PVC, PE 25%, PP 5%, synthetic rubber 10% and other foreign matter 10 70-80% of waste synthetic resin having a composition ratio of%, 10-15% of magnesium carbonate, 2-4% of TCP (tricresyl phosphate), 2-4% of DOP (dioctylphthalate), D-lauryl phthalate (DLP) 2 to 4%, 2 to 4% of TPP (triphenylphosphate), 2 to 4% of chloroparaffins, and 1 to 2% of zinc stearate are mixed and heated and melted at a temperature of 200 to 250 ° C. to press compression, extrusion or injection. Although a method for manufacturing a product such as a sidewalk block and a bench has been proposed, the method described in this patent has advantages in improving plasticity and flame retardancy, but it does not improve tensile strength. In Japanese Patent Publication No. 52-23179, waste PVC is crushed, and polyethylene (PE) or polypropylene (PP) is added to a certain ratio and extruded at a temperature of 180 to 200 ° C. to improve tensile strength so that it can be used as a recycled plastic. However, blending two resins using only PVC and polyolefin-based resins and not using other compatibilizers overlooked the problem of poor mechanical compatibility compared to the original resins. U.S. Patent No. 5,232,606 also adds DOP (dioctylphthalate) to separate PVC and polyester when it is mixed and is present in the form of liquid PVC containing plasticizer at appropriate temperature conditions (100-200 ℃). The method of separating PVC from polyester that is not plasticized by filtration is proposed, but there is a problem that a large amount of plasticizer must be mixed in the amount of plasticizer from 40:60 to 1:99 compared to PVC. There is a disadvantage that it is not economical to go through the process to do more.

Most of the waste plastics currently collected are waste PVC and waste PE, and are also collected by mixing with different kinds of polymers. Therefore, it is more economical to recycle these polymers in a mixed state rather than separately. In particular, in the case of mixed waste PVC, for example, in the case of agricultural thermal insulation film, the film of PVC and PE is laminated, so it is not easy to separate, and the current situation is mainly dependent on incineration. In addition, PVC / PE-based polymer mixture is currently used as a packaging material, the exterior of the wire. However, physical and mechanical properties are significantly lower than those of each because they are incompatible with each other.

Therefore, the present inventors, when recycled in a mixed state of waste PVC and waste PE, which occupy most of the waste plastic, the physical properties of the same resin due to compatibility between the dissimilar resin of waste PVC and waste PE Research efforts have been made to compensate for the significant deterioration.

As a result, in the waste plastic mainly containing waste PVC and waste PE, the main chain has ethylene bond as a compatibilizer and the side chain group contains a copolymer of a specific structure having an ester group, an acetate group or an acrylic group in a certain content ratio. The purpose of the present invention is to provide a waste PVC / PE-based polymer mixture in which the mechanical properties of the mixture are improved by minimizing the phase separation of the liver.

1 is a SEM photograph of the waste PVC / PE polymer mixture according to (a) Example 6, (b) Example 7 and (c) Comparative Example 3.

The present invention is a waste plastic containing waste PVC and waste PE as a main component, a copolymer having an ethylene bond as a main chain and ester, acetate or acrylic group as the side chain is 0.1 parts by weight of 100 parts by weight of waste plastic as a compatibilizer. It is characterized by a waste PVC / PE-based polymer mixture containing ~ 20 parts by weight.

Referring to the present invention in more detail as follows.

The present invention relates to a waste PVC / PE-based polymer mixture which maximizes the recycling efficiency of waste plastic by adding a specific copolymer as a compatibilizer to the waste PVC and waste PE when they are collected and mixed.

Waste plastic applied to the present invention is contained in the range of 1 to 99 parts by weight of waste PVC and 1 to 99 parts by weight of waste PE. Waste PVC can be applied to all waste PVC processed products, from rigid to soft, with plasticizer added. The rigid includes window profiles and PVC pipes used in the manufacture of window frames. Gaskets, automotive door gaskets, hoses and the like. Waste PE includes packaging packs, PE bottles, and various agricultural films. It also includes the case of a mixed or laminated film of PVC and PE. It also includes a case where a small amount of foreign substances such as rubber, metal, heterogeneous resin is contained together with the collected waste PVC and waste PE resin.

On the other hand, the copolymer used in the present invention as a compatibilizer of the waste PVC and waste PE mixture, the main chain portion of the ethylene bond having affinity with PE and the side chain portion of the ester bond, acetate bond having affinity with vinyl chloride resin Or a copolymer forming an acrylic bond. The copolymer may be a random copolymer, an alternating copolymer, a block copolymer or a graft copolymer. More specifically, ethylene vinyl acetate copolymer, ethylene methyl acrylate copolymer, ethylene acrylic acid copolymer, ethylene ethyl acrylate copolymer, ethylene ethyl acrylate graft methacrylate copolymer, ethylene methyl acrylate graft -Methacrylate copolymer, ionomer, ethylene vinyl acetate-graft-maleic acid copolymer, ethylene-graft-maleic acid copolymer and the like.

As a compatibilizer, the copolymer is preferably used in an amount of 0.1 to 20 parts by weight based on 100 parts by weight of waste plastic mainly containing waste PVC and waste PE. If the content is less than 0.1 part by weight, phase separation between dissimilar resins is remarkable. Occurs, and if it exceeds 20 parts by weight, there is a problem in that the mechanical properties rather deteriorate due to the use of excess. In addition, it is more preferable from the viewpoint of miscibility between dissimilar resins that the substitution rate of the side chain groups of the ester group, the acetate group or the acryl group introduced into the ethylene main chain is maintained in the range of 1 to 70% by weight.

On the other hand, the waste PVC / PE-based polymer mixture according to the present invention may be added to the conventional additives as a compatibilizer in addition to the above-mentioned copolymer, the waste plastics to which the present invention is applied to the outside as a recycled product is exposed to the outside, the oxidation proceeds in part It is also possible to add 0.01 to 3 parts by weight of lubricant, 0.01 to 5 parts by weight of stabilizer, 0.01 to 1 part by weight of antioxidant and the like in small amounts with respect to 100 parts by weight of waste plastic. In addition, the waste PVC / PE-based polymer mixture of the present invention includes one selected from light stabilizers, thermal stabilizers, ultraviolet absorbers, antistatic agents, waxes, pigments, fire retardants, and fillers to improve processing characteristics in addition to the conventional additives described above. It may further contain additives of species or more.

Referring to the manufacturing method of the waste PVC / PE polymer mixture of the present invention described above in detail. Copolymers, lubricants, antioxidants, and other additives as a compatibilizer together with basic resins such as waste PVC and waste PE that are collected and crushed, are rotated in a ribbon blender, V-type blender, or Henschel mixer. Premix for several minutes at room temperature at several to several thousand rpm using a mixing means with stirring means. Then, using a conventional extruder, a Brabender Plasticorder, a Barnary Mixer, or a kneading extrusion means such as Kneader or Roll Mill, 20 to 500 rpm at 110 to 220 ° C. Can be prepared by melt mixing.

As described above, the present invention relates to a waste PVC / PE-based polymer mixture in which waste PVC and waste PE are mixed or present at a predetermined ratio, and most of them rely on incineration and landfill as high-quality recycled products. By minimizing phase separation between dissimilar resins by using compatibilizers, it can be widely applied to building materials and daily necessities through extrusion and injection. Therefore, the present invention has the advantage of meeting the demand for environmental preservation by economical and incineration or landfill because it reuses the waste mixed resin.

On the other hand, the present invention as a technology for containing a copolymer of a specific structure as a compatibilizer in order to solve the compatibility problems caused by the mixed use of waste PVC and waste PE, while the above description will be described only waste PVC and waste PE. The same effect can be obtained even if the copolymer of the present invention is applied for the purpose of solving the compatibility problem caused by the use of a mixture of new PVC and PE.

Although this invention is demonstrated in detail based on the following Example, this invention is not limited to an Example.

Examples 1-8

The waste PVC (RPVC-1), which was collected by crushing the window profile for the window frame, and the waste PE (RPE-1), which was pulverized with polyethylene waste particles, which is an industrial packaging pack, were mixed at a content ratio of 50/50. To 100 parts by weight of the above-mentioned waste plastic, a certain amount of the copolymer shown in Table 1 was added as a compatibilizer, 0.5 part by weight of stearic acid as a lubricant, 1 part by weight of Ca-Ba-Zn-based organic complex as a stabilizer, and 0.1 parts by weight of phenylolpropane was added and premixed. The premix was kneaded at 250 rpm using a twin screw extruder (L / D = 13) having a temperature controlled at 140 to 200 ° C., and pellets were prepared by a strand cutting method.

In order to measure the mechanical properties of the prepared mixture was preheated for 3 minutes using a mold of 140 × 140 × 2 mm in a press adjusted to a temperature of 180 ℃, a pressure was applied for 5 minutes to prepare a sheet and processed into a test piece . Tensile strength and elongation were measured using Instron 8516 based on performing ASTM D638 test specification.

(Unit: parts by weight) Example One 2 3 4 5 6 7 8 RPVC-1 50 50 50 50 50 50 50 50 RPE-1 50 50 50 50 50 50 50 50 Copolymer EVA-1 ¹⁾ 5 - - - - - - - EVA-g-MAH ²⁾ - 5 - - - - - - LLDPE-g-MAH ³⁾ - - 5 - - - - - EAA ⁴⁾ - - - 5 - - - - EMA ⁵⁾ - - - - 5 - - - EEA ⁶⁾ - - - - - 5 - - Modiper ⁷⁾ - - - - - - 5 - Ionomer ⁸⁾ - - - - - - - 5 Lubricant ⁹⁾ 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 Stabilizer ¹⁰⁾ One One One One One One One One Antioxidant ¹¹⁾ 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 Tensile Strength (MPa) 20 15 17 13 15 20 23 11 % Elongation 48 40 44 38 50 43 59 52 1) EVA-1: Ethylene vinyl acetate copolymer (MI = 2 g / 10 min, VA = 25%) 2) EVA-g-MAH: Ethylene vinyl acetate-graft-maleic acid copolymer (MI = 2.5 g / 10 min) 3 ) LLDPE-g-MAH: Linear low density polyethylene-graft-maleic acid copolymer (MI = 1.5 g / 10 min) 4) EAA: Ethylene acrylic acid copolymer (MI = 300 g / 10 min, EA = 20%) 5) EMA: Ethylene Methyl acrylate copolymer (MI = 2.4 g / 10 min, MA = 20%) 6) EEA: Ethylene ethyl acrylate copolymer (MI = 6 g / 10 min, EA = 18%) 7) Modiper: Ethylene ethyl acrylate-graph T-methacrylate copolymer (MI = 3.4g / 10min, MMA = 30%) 8) Ionomer: ethylene methacrylate copolymer (MI = 2.8g / 10min)

As shown in Table 1, the waste PVC / PE-based polymer mixtures of Examples 1 to 8 according to the present invention by using a copolymer of a specific structure as a compatibilizer confirms excellent mechanical properties such as tensile strength, elongation Could. Particularly, when EVA-1, Modiper or EEA was used as the compatibilizer, the tensile strength and elongation were significantly improved in comparison with the polymer mixture containing no compatibilizer (Comparative Example 3, see Table 3). 1 is a result of confirming the SEM photograph of the judgment surface after PVC extraction by treating each of the polymer mixture of Example 6, Example 7, and Comparative Example 3 with THF. According to Figure 1, Example 6 (a) and Example 7 (b) it can be seen that the size of the PVC domain is smaller than in Comparative Example 3 (c).

Examples 9-15

As shown in the following Table 2, the composite resin (RPVC / RPE-1; PVC / PE = 55/45) of waste PVC and waste PE was shredded and the waste wire separator (RPVC / RPE-2; PVC / PE = 70/30) or by changing the composition of waste PVC and waste PE and kneading by the method of Example 1 using different kinds of VA content of EVA, the test pieces were prepared by press working to measure tensile strength and elongation.

(Unit: parts by weight) Example 9 10 11 12 13 14 15 16 17 RPVC / RPE-1 ¹⁾ - - - - 100 - - - - RPVC / RPE-2 ²⁾ - - - - - 100 - - - RPVC-1 95 85 15 5 - - 85 50 15 RPE-1 5 15 85 95 - - 15 50 85 Copolymer EVA-1 ³⁾ 5 5 5 5 5 5 - - - EVA-2 ⁴⁾ - - - - - - 5 5 5 Lubricant ⁵⁾ 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 Stabilizer ⁶⁾ One One One One One One One One One Antioxidant ⁷⁾ 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 Tensile Strength (MPa) 40 35 21 23 19 14 42 27 25 % Elongation 170 70 650 780 46 75 175 125 680 1) RPVC / RPE-1: Waste PVC / PEE Composite Film (PVC / PE = 55/45) 2) RPVC / RPE-2: Waste Wire Separator (PVC / PE = 70/30) 3) EVA-1 : Ethylene vinyl acetate copolymer (MI = 2 g / 10 min, VA = 25%) 4) EVA-2: Ethylene vinyl acetate copolymer (MI = 150 g / 10 min, VA = 65%) 5) Lubricant: stearic acid 6) Stabilizer: Ca-Ba-Zn-based organic complexes7) Antioxidant: diphenylolpropane

Table 2 is an example of a polymer mixture containing EVA as a compatibilizer while changing the composition of waste PVC and waste PE within the scope of the present invention. The higher the substitution rate of the side chain group, that is, the higher the content of vinyl acetate (VA) in EVA, the better the compatibility was. Thus, the tensile strength and elongation was improved when EVA-2 was included compared to EVA-1. .

The composite films of Examples 13 and 14 also show improved elongation and tensile strength compared to Comparative Examples 6 and 7.

Comparative Examples 1 to 6

As shown in Table 3 below, the composition of waste PVC and waste PE was changed and kneaded by the method of Example 1. The prepared pellets were prepared into test pieces by press working to measure tensile strength and elongation.

(Unit: parts by weight) Comparative example One 2 3 4 5 6 7 RPVC-1 100 85 50 15 - - - RPE-1 - 15 50 85 100 - - RPVC / RPE-1 ¹⁾ - - - - - 100 - RPVC / RPE-2 ²⁾ - - - - - - 100 Lubricant ³⁾ 0.5 0.5 0.5 0.5 0.5 0.5 0.5 Stabilizer ⁴⁾ One One One One One One One Antioxidant ⁵⁾ 0.1 0.1 0.1 0.1 0.1 0.1 0.1 Tensile Strength (MPa) 42 21 6 12 21 7 11 % Elongation 150 28 20 570 800 16 32 1) RPVC / RPE-1: Waste PVC / PEE Composite Film (PVC / PE = 55/45) 2) RPVC / RPE-2: Waste Wire Separator (PVC / PE = 30/70) 6) Stabilizer: Ca-Ba-Zn organic complex 7) Antioxidant: Diphenylolpropane

As shown in Table 3, when mixing and mixing waste PVC and waste PE, there is no compatibility, and as the content of the dissimilar resin increases, the mechanical strength decreases rapidly.

Examples 16-19

As shown in Table 4, the composition of the waste PVC and the waste PE was 50/50, and the content of EVA-1 was changed, and the mixture was kneaded under the same conditions as in Example 1 to prepare a test piece by pressing to obtain tensile strength and elongation. Was measured.

(Unit: parts by weight) Example 16 17 18 19 Waste PVC-1 50 50 50 50 Waste PE-1 50 50 50 50 EVA-1 ¹⁾ One 3 10 20 Lubricant ²⁾ 0.5 0.5 0.5 0.5 Stabilizer ³⁾ One One One One Antioxidant ⁴⁾ 0.1 0.1 0.1 0.1 Tensile Strength (MPa) 22 23 21 22 % Elongation 50 52 53 70 1) EVA-1: Ethylenevinylacetate copolymer (MI = 2g / 10min, VA = 25%) 2) Lubricant: Stearic acid 3) Stabilizer: Ca-Ba-Zn organic complex 4) Antioxidant: Diphenylolpropane

Table 4 is a result of measuring the mechanical properties by varying the content of EVA-1 in the polymer mixture of the same composition, in the case of Example 16 compared to the simple mixture containing no copolymer of Comparative Example 3 tensile strength Increased sharply and slowed down at higher contents.

Examples 20-29

As shown in Table 5, the composition of the waste PVC and the waste PE was changed, and the content of the compatibilizer, the processing aid, and the stabilizer was changed, kneaded under the same conditions as in the method of Example 1, and the test piece was manufactured by press working to obtain tensile strength and Elongation was measured.

(Unit: parts by weight) Example 20 21 22 23 24 25 26 27 28 29 Waste PVC-1 50 85 85 85 50 15 85 85 50 15 Waste PE-1 50 15 15 15 50 85 15 15 50 85 Copolymer EVA-1 ¹⁾ 5 10 - - - - - - - - Modiper ²⁾ - - One 10 3 3 - - - - EEA ³⁾ - - - - - - One 10 3 3 Lubricant ⁴⁾ 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 Stabilizer ⁵⁾ 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 Antioxidant ⁶⁾ 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 Tensile Strength (MPa) 19 38 34 35 21 21 35 34 21 21 % Elongation 48 98 71 102 50 620 78 130 57 570 1) EVA-1: Ethylene vinyl acetate copolymer (MI = 2 g / 10 min, VA = 25%) 2) Modiper: Ethylene ethyl acrylate-graft-methacrylate copolymer (MI = 3.4 g / 10 min, MMA = 30%) 3) EEA: Ethylene ethyl acrylate copolymer (MI = 6 g / 10 min, EA = 18%) 4) Lubricant: Stearic acid 5) Stabilizer: Ca-Ba-Zn organic complex 6) Antioxidant: Diphenylol Propane

In Table 5, when the stabilizer content in the polymer mixture composition was changed (Example 20), the effect on the mechanical properties was found to be small, and when the composition of the waste PVC was higher than the waste PE, the content of EVA-1 was increased. (Example 21) shows that the tensile strength is improved. When the content of Modiper or EEA and the composition of waste PVC / waste PE were changed (Examples 22 to 29), physical properties were improved similarly to changes of EVA.

Examples 30-34

As shown in the following Table 6, by selecting the kind of waste PVC and waste PE, the content of copolymer, processing aid and stabilizer was changed, kneaded under the same conditions as the method of Example 1 to prepare a test piece by press working to obtain tensile strength. And elongation was measured.

(Unit: parts by weight) Example 30 31 32 33 34 RPVC-1 30 30 40 50 50 RPVC-3 ¹⁾ - 20 - - - RPE-1 50 50 50 50 50 NPVC ²⁾ 20 - - - - NPE ³⁾ - - 10 - - REVA ⁴⁾ - - - 5 10 Modiper ⁵⁾ 5 - 5 - - EEA ⁶⁾ - 5 - - - Lubricant ⁷⁾ 0.5 0.5 0.5 2 0.5 Stabilizer ⁸⁾ One One One 0.5 One Antioxidant ⁹⁾ 0.1 0.1 0.3 0.1 0.1 Tensile Strength (MPa) 23 12 21 19 18 % Elongation 75 40 53 39 58 1) RPVC-3: Waste Soft PVC (DOP = 50%) 2) NPVC: New Hard PVC Compound (P1000) 3) NPE: Low Density Polyethylene (MI = 2g / 10min) 4) REVA: Collected and Shredded EVA Particles5 ) Modiper: ethylene ethyl acrylate-graft-methacrylate copolymer (MI = 3.4 g / 10 min, MMA = 30%) 6) EEA: ethylene ethyl acrylate copolymer (MI = 6 g / 10 min, EA = 18% 7) Lubricant: Stearic acid 8) Stabilizer: Ca-Ba-Zn organic complex 9) Antioxidant: Diphenylolpropane

As shown in Table 6, as a result of changing the content of the compatibilizer, processing aid, stabilizer for the soft waste PVC, as well as soft waste PVC, waste PE film, it can be seen that the mechanical strength of each composition is excellent.

As confirmed through the above examples and comparative examples, the waste PVC / PE-based polymer mixture according to the present invention contains a copolymer having a specific structure as a compatibilizer, so that high-quality recycled products can be manufactured by minimizing phase separation between dissimilar resins. Through extrusion and injection, it can be used as building materials and daily necessities. Therefore, since the present invention recycles the waste mixed resin which has been incinerated or landfilled, it is preferable in terms of economics and environmental conservation.

Claims (7)

In the waste plastic mixture containing waste PVC and waste PE as main components, the main chain has an ethylene bond with respect to 100 parts by weight of waste plastic as a compatibilizer, and the copolymer having an ester group, an acetate group or an acryl group is 0.1 to 20 as a side chain group. Waste PVC / PE-based polymer mixture, characterized in that contained by weight. The waste PVC / PE-based polymer mixture according to claim 1, wherein the waste plastic contains 1 to 99 parts by weight of waste PVC and 1 to 99 parts by weight of waste PE. The waste PVC / PE-based polymer mixture according to claim 1, wherein the waste PVC is waste hard PVC, waste soft PVC, or a mixture thereof. The method of claim 1, wherein the compatibilizer is ethylene vinyl acetate copolymer, ethylene methyl acrylate copolymer, ethylene acrylic acid copolymer, ethylene ethyl acrylate copolymer, ethylene ethyl acrylate-graft- methacrylate copolymer, ethylene Waste PVC / PE-based polymer, characterized in that the copolymer is selected from methylacrylate-graft-methacrylate copolymer, ionomer, ethylene vinyl acetate-graft-maleic acid copolymer and ethylene-graft-maleic acid copolymer mixture. The waste PVC / PE-based polymer mixture according to claim 1, wherein the copolymer has 1 to 70% by weight of side chain groups of an ester group, an acetate group or an acrylic group bonded to the ethylene main chain. The waste PVC / PE polymer mixture according to claim 1, wherein 0.01 to 3 parts by weight of lubricant, 0.01 to 5 parts by weight of stabilizer and 0.01 to 1 part by weight of antioxidant are contained with respect to 100 parts by weight of the waste plastic. The waste PVC / PE-based polymer mixture according to claim 1, wherein PVC and PC as new materials are contained in place of the waste PVC and waste PE.