JP2005048134A - Masterbatch for reclaimed resin, method for producing the same and method for producing reclaimed resin molded article - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a masterbatch for reclaimed resin effective for preventing the degradation of a virgin resin in a recycling method using a virgin resin and a reclaimed resin, a method for producing the masterbatch and a method for producing a molded article of a reclaimed resin. <P>SOLUTION: The method for producing a molded article of a reclaimed resin contains a step to knead a material containing a reclaimed resin and an inorganic additive under melting to produce a masterbatch for a reclaimed resin, a step to produce a reclaimed resin composition by the dry-blending of a material containing a virgin resin and the masterbatch for reclaimed resin and a step to produce a molded article by using the reclaimed resin composition. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a recycled resin masterbatch for manufacturing a recycled resin molded body used for electronic devices, home appliances, interiors, and the like, a manufacturing method thereof, and a manufacturing method of the recycled resin molded body.

  In recent years, legislation concerning resource countermeasures has progressed, such as the enactment of the Effective Resource Utilization Law, and efforts to recycle products, reuse resources, and reduce waste have become active. In particular, the collection and recycling of sold products has become important for manufacturers of home appliances and electronic devices.

  For example, in mobile electronic devices such as notebook computers and mobile phones, resin materials are often used from the viewpoints of lightness and moldability as the material constituting the housing, and in the field of mobile electronic devices The establishment of recycling technology for resin casings is strongly desired.

A resin casing of a mobile electronic device is generally manufactured by molding and is made of a thermoplastic resin composition. Therefore, if the resin casing is collected, it can be remelted and used again for molding. As a conventional recycling method for the resin casing, only a recovered resin molded body is remelted as a resin material and molded again (for example, refer to Patent Document 1 and Patent Document 2), or recovered resin molding. There has been proposed a method of melting a kneaded product of a body and a new resin as a resin material and using it for molding (see, for example, Patent Document 3 and Patent Document 4).
Japanese Patent Laid-Open No. 7-60819 JP 2001-277279 A Japanese Patent Laid-Open No. 9-235405 JP 2001-38729 A

  However, in the method in which only the collected resin molded body is remelted as a resin material and molded again, the characteristics of the molded body are significantly deteriorated as compared with the new resin. Further, in the method of melting the kneaded product of the collected resin molded body and the new resin as a resin material and using it for mold molding, there is a problem that the physical properties of the recycled resin are reduced by the process of melting and kneading the new resin and the recovered resin. There is.

  Hereinafter, this problem will be described with reference to the drawings. FIG. 2 is a flowchart showing an example of a conventional recycling method. FIG. 2 shows a flow in which a recycled resin is produced by a method of melt-kneading a new resin, a recovered resin, an additive, and the like.

  In this conventional recycling method, a melt-kneading process is indispensable, and this process destroys the polymer structure of the new resin material, lowers the molecular weight, and deteriorates. Moreover, the deterioration of moldability also occurs due to the change in the resin composition.

  The present invention provides a recycled resin masterbatch capable of preventing deterioration of a new resin, a method for producing the same, and a method for producing a recycled resin molded article in a recycling method using a new resin and a recovered resin.

  The present invention provides a recycled resin masterbatch comprising a recovered resin and an inorganic additive, wherein the recovered resin and the inorganic additive are melt-kneaded.

  Moreover, this invention provides the manufacturing method of the masterbatch for recycled resin characterized by melt-kneading the material containing collection | recovery resin and an inorganic additive.

  The present invention also includes a step of melt-kneading a material containing a recovered resin and an inorganic additive to produce a recycled resin masterbatch, and dry blending a material containing the new resin and the recycled resin masterbatch. There is provided a method for producing a recycled resin molded product, comprising a step of producing a recycled resin composition and a step of producing a molded product using the recycled resin composition.

  In the present invention, since the recovered resin can be reused and a recycled resin molded body can be produced without melt-kneading the new resin and the recovered resin, the new resin does not add a wasteful heat history. It is possible to prevent thermal degradation of the.

  An example of a method for producing a recycled resin molded article of the present invention is a dry blend of a process for producing a masterbatch for recycled resin by melting and kneading a recovered resin and an inorganic additive, and a new resin and the masterbatch for recycled resin. And a step of producing a recycled resin composition, and a step of producing a molded body using the recycled resin composition.

  After a recovered resin and an inorganic additive are melt-kneaded in advance to produce a recycled resin masterbatch, a wasteful heat history is added to the new resin by dry blending the new resin and the recycled resin masterbatch. It can prevent that the characteristic of a novel resin falls. In addition, since a wasteful heat history is not added to the new resin, it is possible to obtain a recycled resin composition having the same physical properties as the new resin even if the amount of the recovered resin is increased. Achieving both effective use of resources. Furthermore, it is possible to easily change the usage rate of the recovered resin by changing the blending ratio of the master batch for recycled resin.

  Here, the new resin is a resin material that is not used for mold molding. In the present embodiment, the recovered resin is a resin material made of the same type of resin as the new resin and obtained from the resin molded body recovered after being distributed to the market. Further, dry blending simply means physical mixing without adding heat or a solvent.

  Examples of the new resin and recovery resin used in the present embodiment include polycarbonate (PC), acrylonitrile-butadiene-styrene (ABS) resin, acrylonitrile-styrene (AS) resin, polystyrene (PS), polypropylene (PP), and polyethylene. (PE), polyamide (PA), polyethylene terephthalate (PET), liquid crystal polymer (LCP) and the like.

  The ratio of the new resin is preferably 10% by weight or more and 80% by weight or less in terms of the total weight ratio. Within this range, it is possible to reuse the recovered resin while maintaining the characteristics of the new resin, and it is possible to effectively use resources by avoiding the disposal of the recovered resin, and for the new resin. This is because raw material costs are reduced.

  As the inorganic additive, glass fiber short fibers (fiber length of about 5 to 10 mm), glass fiber long fibers (fiber length of about 10 to 30 mm), carbon fiber, talc, glass flakes, mica and the like can be used. The ratio of the inorganic additive can be 1% by weight or more and 30% by weight or less in terms of the total weight ratio.

  In the step of producing the recycled resin master batch, it is preferable to further melt and knead the flame retardant. Examples of the flame retardant include phosphate ester flame retardants such as diphenyl phosphate, ethyl acid phosphate, and dixylenyl phosphate, red phosphorus flame retardant coated with inorganic substance of red phosphorus, silane coupling agent, organosilsesquioxane, Examples include silicone-based flame retardants such as modified silicones and silicone polymers, and other inorganic flame retardants. The ratio of the flame retardant can be 1% by weight or more and 20% by weight or less in the total weight ratio.

  The recycled resin master batch corresponds to a filling material added to the new resin. The master batch for recycled resin according to the present embodiment includes a recovered resin and an inorganic additive, and the recovered resin and the inorganic additive are melt-kneaded. By melt-kneading the recovered resin and the inorganic additive, the bond between them can be strengthened.

  The ratio of the recovered resin is preferably 50% by weight or more in terms of the weight ratio of the entire recycled resin master batch. This is because, within this range, a sufficient amount of recovered resin can be reused.

  Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a flowchart showing an example of a method for producing a recycled resin molded body of the present invention. First, a glass fiber reinforced polycarbonate (GF reinforced PC) casing recovered from a discarded notebook personal computer is pulverized to a size of about 3 to 8 mm to prepare a recovered resin. Further, reinforced glass fiber chopped strands for polycarbonate (reinforced GF · CS for PC) are prepared as inorganic additives. Furthermore, a phosphate ester flame retardant is prepared as a flame retardant.

  Next, the recovered resin, the inorganic additive, and the flame retardant are put into a twin screw extruder kneader and melt kneaded, and then extruded from a die at the tip of the twin screw extruder kneader to form a strand-like resin having a diameter of 2 to 3 mm. Get. This strand resin is cut into pellets to obtain a recycled resin master batch.

  Next, after dry blending a new resin made of GF-reinforced PC and the recycled resin masterbatch, it is put into a molding machine to obtain a recycled resin molded body (resin casing) of the present embodiment.

  When a recycled resin molded product is manufactured using only a recovered resin obtained by pulverizing a molded product manufactured by a conventional GF reinforced PC, the physical properties of the molded product are drastically deteriorated and it is difficult to apply it to an electronic device casing. . Causes of physical properties decrease are: (i) decrease in molecular weight due to heat history of resin, (ii) refinement of glass fiber (GF) contained by repeated molding, grinding and kneading, (iii) inclusion due to heat history Deterioration of the flame retardant used can be considered.

  On the other hand, in the method for producing a recycled resin molded body of the present embodiment shown in FIG. This is because (i) there is no thermal degradation of the new resin, (ii) a new resin component blended with the reduced molecular weight of the recovered resin, and (iii) reinforced GF / CS for PC newly mixed with GF refinement In addition, (iv) by making the recovered resin and GF into a master batch, the interface between the recovered resin and GF becomes stronger, and the effect of improving the strength is exhibited.

(Example 1)
<Production of master badge for recycled resin>
A PC recovery resin was obtained by pulverizing an unpainted notebook personal computer casing made of GF reinforced PC (trade name: Toughlon GZK3200, manufactured by Idemitsu Petrochemical Co., Ltd.) containing 20% by weight of GF. Moreover, GF (trade name: CS03MAFT737, manufactured by Asahi Fiber Glass Co., Ltd.) having an average fiber length of 6 mm was prepared as an inorganic additive.

  Next, using a twin-screw extrusion kneader (trade name: KZW-15-30MG, manufactured by Technobel), the PC recovered resin is melt-kneaded at about 260 ° C., the screw speed is set to 250 rpm, and the cylinder temperature is set. Melt kneading extrusion was performed at 260 ° C. At that time, a biaxial side feeder for KZW15 (trade name: SFD152, manufactured by Technobell) was attached to a vent port provided on the middle side of the biaxial extrusion kneader, and the GF was supplied and added to the molten resin. Thereafter, the strand-shaped resin composition discharged from the die attached to the cylinder tip was cooled, and a pellet-shaped recycled resin master batch was obtained using a strand cut pelletizer (trade name: SCP-102, manufactured by Technobel). .

<Preparation of recycled resin composition>
A pellet-shaped PC new resin made of GF reinforced PC (trade name: Toughlon GZK3200, manufactured by Idemitsu Petrochemical Co., Ltd.) was prepared.

  Next, the PC new resin and the recycled resin master batch were dry blended in a dry state using a mixer to obtain a recycled resin composition. As shown in Table 1, the blended composition (% by weight) of the recycled resin composition of this example was PC new resin: PC recovered resin: GF = 15: 80: 5.

<Preparation of recycled resin molding>
Using the recycled resin composition obtained as described above, an injection molding machine (trade name: SG50, manufactured by Sumitomo Machinery Co., Ltd.) and a cylinder sample for bending test at a cylinder temperature of 280 ° C. and a mold temperature of 80 ° C. (Length 126 mm, width 12.8 mm, thickness 3.2 mm), molded sample for Izod impact test (length 126 mm × width 12.8 mm × thickness 3.2 mm, notch having depth in thickness direction) Depth 2.54 mm) and a molded sample for combustion test (length 126 mm, width 12.8 mm, thickness 0.8 mm) were molded.

<Izod impact test>
The impact resistance of the molded sample for Izod impact test produced as described above was examined. Specifically, an Izod impact test was performed in accordance with JIS K 7110 using an Izod impact tester (trade name: Impact Tester, manufactured by Toyo Seiki). As a result, as shown in Table 2, the Izod impact strength was 6 kgf · cm / cm.

<Bending test>
The bending strength and bending elastic modulus of the molded sample for bending test produced as described above were measured. Specifically, using a universal testing machine (trade name: Instron 5581, manufactured by Instron Japan), a three-point bending test was performed on the molded body sample in accordance with JIS K 7055. That is, the distance (span) between the two support points was 51.2 mm, and the bending strength and the bending elastic modulus of the molded body sample were measured by applying a pressing force to the approximate center between the two support points. As a result, as shown in Table 2, the bending strength was 911 kgf / cm ² and the bending elastic modulus was 49356 kgf / cm ² .

<Combustion test>
The combustibility of the molded sample for combustion test produced as described above was examined. Specifically, a combustion test was performed in accordance with UL94. As a result, as shown in Table 2, the combustibility was V-2.

(Example 2)
As shown in Table 1, a molded product sample was prepared in the same manner as in Example 1 except that the composition (weight%) of the recycled resin composition was PC new resin: PC recovery resin: GF = 45: 50: 5. The Izod impact test, bending test, and combustion test were performed. The results are shown in Table 2.

(Example 3)
As shown in Table 1, a molded product sample was prepared in the same manner as in Example 1 except that the composition (weight%) of the recycled resin composition was PC new resin: PC recovered resin: GF = 75: 20: 5. The Izod impact test, bending test, and combustion test were performed. The results are shown in Table 2.

(Example 4)
<Production of master badge for recycled resin>
A PC recovery resin was obtained by pulverizing an unpainted notebook personal computer casing made of GF reinforced PC (trade name: Toughlon GZK3200, manufactured by Idemitsu Petrochemical Co., Ltd.) containing 20% by weight of GF. Moreover, GF (trade name: CS03MAFT737, manufactured by Asahi Fiber Glass Co., Ltd.) having an average fiber length of 6 mm was prepared as an inorganic additive. Furthermore, a phosphorus flame retardant (trade name: Leophos TPP, manufactured by Ajinomoto Fine Techno) was prepared as a flame retardant.

  Next, using a twin-screw extrusion kneader (trade name: KZW-15-30MG, manufactured by Technobel), the PC recovery resin and the flame retardant are melt-kneaded at about 260 ° C., and the screw speed is set to 250 rpm. Then, melt-kneading extrusion was performed at a cylinder temperature of 260 ° C. At that time, a biaxial side feeder for KZW15 (trade name: SFD152, manufactured by Technobell) was attached to a vent port provided on the middle side of the biaxial extrusion kneader, and the GF was supplied and added to the molten resin. Thereafter, the strand-shaped resin composition discharged from the die attached to the cylinder tip was cooled, and a pellet-shaped recycled resin master batch was obtained using a strand cut pelletizer (trade name: SCP-102, manufactured by Technobel). .

<Preparation of recycled resin composition>
A pellet-shaped PC new resin made of GF reinforced PC (trade name: Toughlon GZK3200, manufactured by Idemitsu Petrochemical Co., Ltd.) was prepared.

  Next, the PC new resin and the recycled resin master batch were dry blended in a dry state using a mixer to obtain a recycled resin composition. As shown in Table 1, the blended composition (% by weight) of the recycled resin composition of this example was PC new resin: PC recovered resin: GF: flame retardant = 15: 75: 5: 5.

  Except as described above, a molded body sample was prepared in the same manner as in Example 1, and an Izod impact test, a bending test, and a combustion test were performed. The results are shown in Table 2.

(Example 5)
As shown in Table 1, the composition of the recycled resin composition (% by weight) was the same as that of Example 4 except that PC new resin: PC recovered resin: GF: flame retardant = 45: 45: 5: 5 A molded body sample was prepared and subjected to an Izod impact test, a bending test, and a combustion test. The results are shown in Table 2.

(Example 6)
As shown in Table 1, the composition of the recycled resin composition (% by weight) was the same as in Example 4 except that PC new resin: PC recovered resin: GF: flame retardant = 70: 20: 5: 5 A molded body sample was prepared and subjected to an Izod impact test, a bending test, and a combustion test. The results are shown in Table 2.

(Comparative Example 1)
A PC recovery resin was obtained by pulverizing an unpainted notebook personal computer casing made of GF-reinforced PC (trade name: Toughlon GZK3200, manufactured by Idemitsu Petrochemical Co., Ltd.) containing 20% by weight of GF. Moreover, GF (trade name: CS03MAFT737, manufactured by Asahi Fiber Glass Co., Ltd.) having an average fiber length of 6 mm was prepared as an inorganic additive. Furthermore, a pellet-like PC new resin made of GF reinforced PC (trade name: Toughlon GZK3200, manufactured by Idemitsu Petrochemical Co., Ltd.) was prepared.

  Next, using a twin-screw extrusion kneader (trade name: KZW-15-30MG, manufactured by Technobel), the PC recovery resin and the PC new resin are melt-kneaded at about 260 ° C., and the screw rotation speed is 250 rpm. It was set and melt kneading extrusion was performed at a cylinder temperature of 260 ° C. At that time, a biaxial side feeder for KZW15 (trade name: SFD152, manufactured by Technobell) was attached to a vent port provided on the middle side of the biaxial extrusion kneader, and the GF was supplied and added to the molten resin. Thereafter, the strand-shaped resin composition discharged from a die attached to the tip of the cylinder was cooled, and a pellet-shaped regenerated resin composition was obtained using a strand cut pelletizer (trade name: SCP-102, manufactured by Technobel). As shown in Table 1, the blended composition (% by weight) of the recycled resin composition of this comparative example was set to PC new resin: PC recovered resin: GF = 15: 80: 5 as in Example 1.

  Except as described above, a molded body sample was prepared in the same manner as in Example 1, and an Izod impact test, a bending test, and a combustion test were performed. The results are shown in Table 2.

(Comparative Example 2)
As shown in Table 1, a molded product sample was prepared in the same manner as in Comparative Example 1 except that the composition (weight%) of the recycled resin composition was PC new resin: PC recovered resin: GF = 45: 50: 5. The Izod impact test, bending test, and combustion test were performed. The results are shown in Table 2.

(Comparative Example 3)
As shown in Table 1, a molded product sample was prepared in the same manner as in Comparative Example 1 except that the blended composition (% by weight) of the recycled resin composition was changed to PC new resin: PC recovered resin: GF = 75: 20: 5. The Izod impact test, bending test, and combustion test were performed. The results are shown in Table 2.

(Comparative Example 4)
Furthermore, as a flame retardant, a phosphorus-based flame retardant (trade name: Leophos TPP, manufactured by Ajinomoto Fine-Techno) is melt-kneaded, and as shown in Table 1, the blended composition (% by weight) of the recycled resin composition is changed to a new PC resin. : PC recovery resin: GF: Flame retardant = 15: 75: 5: 5 A molded body sample was prepared in the same manner as in Comparative Example 1, and an Izod impact test, a bending test, and a combustion test were performed. The results are shown in Table 2.

(Comparative Example 5)
As shown in Table 1, the composition of the recycled resin composition (% by weight) was the same as that of Comparative Example 4 except that PC new resin: PC recovered resin: GF: flame retardant = 45: 45: 5: 5 A molded body sample was prepared and subjected to an Izod impact test, a bending test, and a combustion test. The results are shown in Table 2.

(Comparative Example 6)
As shown in Table 1, the composition of the recycled resin composition (% by weight) was the same as that of Comparative Example 4 except that PC new resin: PC recovered resin: GF: flame retardant = 70: 20: 5: 5 A molded body sample was prepared and subjected to an Izod impact test, a bending test, and a combustion test. The results are shown in Table 2.

表２から明らかなように、実施例１と比較例１、実施例２と比較例２、実施例３と比較例３、実施例４と比較例４、実施例５と比較例５、および実施例６と比較例６は、それぞれ同一組成の組み合わせであるにもかかわらず、各組み合わせにおいて、実施例１〜６は、比較例１〜６に比べてアイゾット衝撃強度、曲げ強度、および曲げ弾性率は高い値を示した。これは、実施例１〜６では、新規樹脂に無駄な熱履歴を加えていないためと考えられる。また、燃焼性については、実施例６でＶ−０を達成したが、比較例６ではＶ−２であった。

As is apparent from Table 2, Example 1 and Comparative Example 1, Example 2 and Comparative Example 2, Example 3 and Comparative Example 3, Example 4 and Comparative Example 4, Example 5 and Comparative Example 5, and Example Although Example 6 and Comparative Example 6 are each a combination of the same composition, in each combination, Examples 1 to 6 are compared with Comparative Examples 1 to 6 in Izod impact strength, bending strength, and bending elastic modulus. Showed a high value. This is thought to be because in Examples 1 to 6, no wasteful heat history was added to the new resin. Moreover, about combustibility, although V-0 was achieved in Example 6, it was V-2 in the comparative example 6.

(Example 7)
An ABS-collected resin was obtained by pulverizing an unpainted notebook personal computer casing made of GF-reinforced ABS resin (trade name: Stylac VGB20, manufactured by Asahi Kasei) containing 20% by weight of GF. Moreover, the pellet-shaped ABS new resin made from the said GF reinforcement | strengthening ABS resin (Brand name: Stylac VGB20, Asahi Kasei make) was prepared.

  Instead of the PC new resin and the PC recovery resin, the above ABS new resin and ABS recovery resin were used, and as shown in Table 3, the blended composition (% by weight) of the recycled resin composition was changed to ABS new resin: ABS recovery resin: GF = A molded body sample was produced in the same manner as in Example 1 except that the ratio was 15: 80: 5, and an Izod impact test, a bending test, and a combustion test were performed. The results are shown in Table 4.

(Example 8)
As shown in Table 3, a molded product sample was prepared in the same manner as in Example 7 except that the composition (weight%) of the recycled resin composition was changed to ABS new resin: ABS recovered resin: GF = 45: 50: 5. The Izod impact test, bending test, and combustion test were performed. The results are shown in Table 4.

Example 9
As shown in Table 3, a molded product sample was prepared in the same manner as in Example 7 except that the blended composition (% by weight) of the recycled resin composition was changed to ABS new resin: ABS recovered resin: GF = 75: 20: 5. The Izod impact test, bending test, and combustion test were performed. The results are shown in Table 4.

(Example 10)
An ABS-collected resin was obtained by pulverizing an unpainted notebook personal computer casing made of GF-reinforced ABS resin (trade name: Stylac VGB20, manufactured by Asahi Kasei) containing 20% by weight of GF. Moreover, the pellet-shaped ABS new resin made from the said GF reinforcement | strengthening ABS resin (Brand name: Stylac VGB20, Asahi Kasei make) was prepared.

  Instead of the PC new resin and PC recovery resin, the above ABS new resin and ABS recovery resin were used. As shown in Table 3, the blended composition (% by weight) of the recycled resin composition was changed to ABS new resin: ABS recovery resin: GF: Except that the flame retardant was set to 15: 75: 5: 5, a molded body sample was prepared in the same manner as in Example 4, and an Izod impact test, a bending test, and a combustion test were performed. The results are shown in Table 4.

(Example 11)
As shown in Table 3, the composition of the recycled resin composition (% by weight) was the same as in Example 10 except that the composition was ABS new resin: ABS recovered resin: GF: flame retardant = 45: 45: 5: 5. A molded body sample was prepared and subjected to an Izod impact test, a bending test, and a combustion test. The results are shown in Table 4.

(Example 12)
As shown in Table 3, the composition of the recycled resin composition (% by weight) was the same as that of Example 10, except that the ABS new resin: ABS recovered resin: GF: flame retardant = 70: 20: 5: 5 A molded body sample was prepared and subjected to an Izod impact test, a bending test, and a combustion test. The results are shown in Table 4.

(Comparative Example 7)
An ABS-collected resin was obtained by pulverizing an unpainted notebook personal computer casing made of GF-reinforced ABS resin (trade name: Stylac VGB20, manufactured by Asahi Kasei) containing 20% by weight of GF. Moreover, the pellet-shaped ABS new resin made from the said GF reinforcement | strengthening ABS resin (Brand name: Stylac VGB20, Asahi Kasei make) was prepared.

  Instead of the PC new resin and the PC recovery resin, the above ABS new resin and ABS recovery resin were used, and as shown in Table 3, the blended composition (% by weight) of the recycled resin composition was changed to ABS new resin: ABS recovery resin: GF = A molded body sample was prepared in the same manner as in Comparative Example 1 except that the ratio was 15: 80: 5, and an Izod impact test, a bending test, and a combustion test were performed. The results are shown in Table 4.

(Comparative Example 8)
As shown in Table 3, a molded product sample was prepared in the same manner as in Comparative Example 7 except that the composition (weight%) of the recycled resin composition was changed to ABS new resin: ABS recovered resin: GF = 45: 50: 5. The Izod impact test, bending test, and combustion test were performed. The results are shown in Table 4.

(Comparative Example 9)
As shown in Table 3, a molded product sample was prepared in the same manner as in Comparative Example 7 except that the blended composition (% by weight) of the recycled resin composition was changed to ABS new resin: ABS recovered resin: GF = 75: 20: 5. The Izod impact test, bending test, and combustion test were performed. The results are shown in Table 4.

(Comparative Example 10)
An ABS-collected resin was obtained by pulverizing an unpainted notebook personal computer casing made of GF-reinforced ABS resin (trade name: Stylac VGB20, manufactured by Asahi Kasei) containing 20% by weight of GF. Moreover, the pellet-shaped ABS new resin made from the said GF reinforcement | strengthening ABS resin (Brand name: Stylac VGB20, Asahi Kasei make) was prepared.

  Instead of the PC new resin and PC recovery resin, the above ABS new resin and ABS recovery resin were used. As shown in Table 3, the blended composition (% by weight) of the recycled resin composition was changed to ABS new resin: ABS recovery resin: GF: Except that the flame retardant was set to 15: 75: 5: 5, a molded body sample was prepared in the same manner as in Comparative Example 4, and an Izod impact test, a bending test, and a combustion test were performed. The results are shown in Table 4.

(Comparative Example 11)
As shown in Table 3, the composition of the recycled resin composition (% by weight) was the same as Comparative Example 10 except that the composition was ABS new resin: ABS recovered resin: GF: flame retardant = 45: 45: 5: 5 A molded body sample was prepared and subjected to an Izod impact test, a bending test, and a combustion test. The results are shown in Table 4.

(Comparative Example 12)
As shown in Table 3, the composition of the recycled resin composition (% by weight) was the same as Comparative Example 10 except that the composition was ABS new resin: ABS recovered resin: GF: flame retardant = 70: 20: 5: 5 A molded body sample was prepared and subjected to an Izod impact test, a bending test, and a combustion test. The results are shown in Table 4.

表４から明らかなように、ＰＣに代えてＡＢＳ樹脂を用いた場合でも、前述と同様の結果となった。

As is clear from Table 4, even when ABS resin was used instead of PC, the same results as described above were obtained.

  As a summary of the above, the configurations of the present invention and variations thereof are listed below as supplementary notes.

  (Supplementary note 1) A masterbatch for recycled resin, comprising a recovered resin and an inorganic additive, wherein the recovered resin and the inorganic additive are melt-kneaded.

  (Additional remark 2) The masterbatch for regenerated resin of Additional remark 1 whose ratio of the said collection | recovery resin is 50 weight% or more in the weight ratio of the whole.

  (Additional remark 3) The masterbatch for recycled resin of Additional remark 1 or 2 containing a flame retardant further.

  (Additional remark 4) The manufacturing method of the masterbatch for recycled resin characterized by melt-kneading the material containing collection | recovery resin and an inorganic additive.

(Additional remark 5) The process of melt-kneading the material containing collection | recovery resin and an inorganic additive, and manufacturing the masterbatch for recycled resin,
A process of dry blending a material containing a new resin and the masterbatch for recycled resin to produce a recycled resin composition;
A step of producing a molded body using the recycled resin composition;
A method for producing a recycled resin molded product comprising:

  (Additional remark 6) The manufacturing method of the recycled resin molded object of Additional remark 5 whose ratio of the said novel resin is 10 to 80 weight% in the whole weight ratio.

  (Additional remark 7) The manufacturing method of the regenerated resin molded object of Additional remark 5 or 6 which melt-kneads a flame retardant further in the process of manufacturing the said masterbatch for regenerated resin.

  As described above, the present invention can obtain good and stable physical properties in a recycled resin molded body. In addition, according to the present invention, since it can be commercialized using a resin casing recovered by a recycling system, the amount of carbon dioxide emitted by incineration of waste is reduced while achieving effective use of resources. It becomes possible to do.

It is a flowchart which shows an example of the manufacturing method of the recycled resin molding of this invention. It is a flowchart which shows an example of the conventional recycling method.

Claims (5)

  A recycled resin masterbatch comprising a recovered resin and an inorganic additive, wherein the recovered resin and the inorganic additive are melt-kneaded.   A method for producing a masterbatch for recycled resin, comprising melting and kneading a material containing a recovered resin and an inorganic additive. A step of producing a master batch for recycled resin by melting and kneading a material containing a recovered resin and an inorganic additive;
A process of dry blending a material containing a new resin and the masterbatch for recycled resin to produce a recycled resin composition;
A step of producing a molded body using the recycled resin composition;
A method for producing a recycled resin molded product comprising:   The method for producing a recycled resin molded article according to claim 3, wherein the ratio of the new resin is 10% by weight or more and 80% by weight or less in terms of the total weight ratio.   The method for producing a recycled resin molded article according to claim 3 or 4, wherein a flame retardant is further melt-kneaded in the step of producing the master batch for recycled resin.

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