JP5367456B2 - Rigid polyvinyl chloride resin composition for injection molding and use thereof - Google Patents
Rigid polyvinyl chloride resin composition for injection molding and use thereof Download PDFInfo
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- JP5367456B2 JP5367456B2 JP2009125913A JP2009125913A JP5367456B2 JP 5367456 B2 JP5367456 B2 JP 5367456B2 JP 2009125913 A JP2009125913 A JP 2009125913A JP 2009125913 A JP2009125913 A JP 2009125913A JP 5367456 B2 JP5367456 B2 JP 5367456B2
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- 238000001746 injection moulding Methods 0.000 title claims abstract description 42
- 239000011342 resin composition Substances 0.000 title claims abstract description 33
- 229920000915 polyvinyl chloride Polymers 0.000 title description 5
- 239000004800 polyvinyl chloride Substances 0.000 title description 5
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 claims abstract description 124
- 239000011347 resin Substances 0.000 claims abstract description 93
- 229920005989 resin Polymers 0.000 claims abstract description 93
- 239000002994 raw material Substances 0.000 claims abstract description 63
- 238000006116 polymerization reaction Methods 0.000 claims abstract description 36
- 239000003381 stabilizer Substances 0.000 claims abstract description 20
- 238000004898 kneading Methods 0.000 claims abstract description 8
- 239000000203 mixture Substances 0.000 claims description 60
- 239000000463 material Substances 0.000 claims description 20
- 238000004519 manufacturing process Methods 0.000 claims description 19
- 238000000034 method Methods 0.000 claims description 16
- 239000008188 pellet Substances 0.000 claims description 14
- 150000002611 lead compounds Chemical class 0.000 claims description 9
- 238000002156 mixing Methods 0.000 claims description 8
- 229920000058 polyacrylate Polymers 0.000 claims description 8
- 239000004609 Impact Modifier Substances 0.000 claims description 7
- 238000010298 pulverizing process Methods 0.000 claims description 7
- 238000001125 extrusion Methods 0.000 claims description 6
- 239000003607 modifier Substances 0.000 claims description 6
- FFBHFFJDDLITSX-UHFFFAOYSA-N benzyl N-[2-hydroxy-4-(3-oxomorpholin-4-yl)phenyl]carbamate Chemical compound OC1=C(NC(=O)OCC2=CC=CC=C2)C=CC(=C1)N1CCOCC1=O FFBHFFJDDLITSX-UHFFFAOYSA-N 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims 1
- 238000002347 injection Methods 0.000 abstract description 6
- 239000007924 injection Substances 0.000 abstract description 6
- 239000000243 solution Substances 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 8
- 238000011156 evaluation Methods 0.000 description 7
- 239000000654 additive Substances 0.000 description 5
- 239000000843 powder Substances 0.000 description 5
- 239000002699 waste material Substances 0.000 description 5
- 229920000800 acrylic rubber Polymers 0.000 description 4
- -1 alkyl tin Chemical compound 0.000 description 4
- 238000002845 discoloration Methods 0.000 description 4
- 230000003746 surface roughness Effects 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 230000003292 diminished effect Effects 0.000 description 3
- 229920001971 elastomer Polymers 0.000 description 3
- 239000000314 lubricant Substances 0.000 description 3
- 239000005060 rubber Substances 0.000 description 3
- 239000010865 sewage Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 239000006057 Non-nutritive feed additive Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 239000000049 pigment Substances 0.000 description 2
- 239000004014 plasticizer Substances 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 241000931526 Acer campestre Species 0.000 description 1
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 description 1
- 239000005062 Polybutadiene Substances 0.000 description 1
- QUGNZNCOLVCQKW-UHFFFAOYSA-M S[Sn] Chemical class S[Sn] QUGNZNCOLVCQKW-UHFFFAOYSA-M 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 239000011258 core-shell material Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- UQLDLKMNUJERMK-UHFFFAOYSA-L di(octadecanoyloxy)lead Chemical compound [Pb+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O UQLDLKMNUJERMK-UHFFFAOYSA-L 0.000 description 1
- 235000012438 extruded product Nutrition 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- OCWMFVJKFWXKNZ-UHFFFAOYSA-L lead(2+);oxygen(2-);sulfate Chemical compound [O-2].[O-2].[O-2].[Pb+2].[Pb+2].[Pb+2].[Pb+2].[O-]S([O-])(=O)=O OCWMFVJKFWXKNZ-UHFFFAOYSA-L 0.000 description 1
- YJOMWQQKPKLUBO-UHFFFAOYSA-L lead(2+);phthalate Chemical compound [Pb+2].[O-]C(=O)C1=CC=CC=C1C([O-])=O YJOMWQQKPKLUBO-UHFFFAOYSA-L 0.000 description 1
- UMKARVFXJJITLN-UHFFFAOYSA-N lead;phosphorous acid Chemical compound [Pb].OP(O)O UMKARVFXJJITLN-UHFFFAOYSA-N 0.000 description 1
- 229940049920 malate Drugs 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229920002857 polybutadiene Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000009864 tensile test Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/141—Feedstock
- Y02P20/143—Feedstock the feedstock being recycled material, e.g. plastics
-
- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/62—Plastics recycling; Rubber recycling
Landscapes
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Branch Pipes, Bends, And The Like (AREA)
Abstract
Description
本発明は、射出成形用硬質塩化ビニル樹脂組成物に関するものである。詳しくは再利用塩化ビニル樹脂および未使用塩化ビニル樹脂を主成分として含有する射出成形用硬質塩化ビニル樹脂組成物に関するものである。特に再利用塩化ビニル樹脂が押出成形された硬質塩化ビニル樹脂である上記組成物に関する。
The present invention relates to a hard vinyl chloride resin composition for injection molding. Specifically, the present invention relates to a hard vinyl chloride resin composition for injection molding containing a recycled vinyl chloride resin and an unused vinyl chloride resin as main components. In particular, the present invention relates to the above composition, wherein the recycled vinyl chloride resin is an extruded hard vinyl chloride resin.
再利用塩化ビニル樹脂および未使用塩化ビニル樹脂を主成分として含有する射出または押出成形用硬質塩化ビニル樹脂組成物は知られている（特許文献１〜２）。また、異なる平均重合度の未使用塩化ビニル樹脂２種類を含有する硬質塩化ビニル樹脂組成物も知られている（特許文献３〜６）。
A rigid vinyl chloride resin composition for injection or extrusion containing a recycled vinyl chloride resin and an unused vinyl chloride resin as main components is known (Patent Documents 1 and 2). Moreover, the hard vinyl chloride resin composition containing two types of unused vinyl chloride resins of different average polymerization degrees is also known (patent documents 3-6).
押出成形された硬質塩化ビニル樹脂を射出成形用に再利用する場合、得られる成形体の外観が悪いなどの問題がある。これは通常押出成形に適する塩化ビニル樹脂の平均重合度は射出成形に適する平均重合度より大きく、流動性が小さいためである。
比較的平均重合度が大きい再利用塩化ビニル樹脂と比較的平均重合度が小さい塩化ビニル樹脂とからなる射出成形用硬質塩化ビニル樹脂組成物が知られている（特許文献１）が、条件によっては組成物の混練性が悪く、得られる成形体の外観が悪い場合があるため使用が制限される。
本発明は、組成物の混練性が良好であり外観が良好な射出成形体を与える、再利用塩化ビニル樹脂が使用された射出成形用硬質塩化ビニル樹脂組成物を提供することを目的とする。
When the extruded hard vinyl chloride resin is reused for injection molding, there are problems such as poor appearance of the resulting molded article. This is because the average degree of polymerization of a vinyl chloride resin suitable for extrusion molding is generally larger than the average degree of polymerization suitable for injection molding, and the fluidity is small.
There is known a hard vinyl chloride resin composition for injection molding composed of a recycled vinyl chloride resin having a relatively high average degree of polymerization and a vinyl chloride resin having a relatively low average degree of polymerization (Patent Document 1). Since the kneadability of the composition is poor and the resulting molded article may have a poor appearance, its use is limited.
An object of the present invention is to provide a hard vinyl chloride resin composition for injection molding in which a recycled vinyl chloride resin is used, which gives an injection-molded article with good kneadability of the composition and good appearance.
上記課題を解決するため、請求項１に記載の発明の射出成形用硬質塩化ビニル樹脂組成物は、
平均重合度が９００〜１２００である塩化ビニル樹脂を主成分とする硬質塩化ビニル樹脂組成物からなる再利用原料Ａまたは再利用原料Ａの粉砕品 ３５〜８０重量部、
平均重合度が５６０〜８５０である塩化ビニル樹脂Ｂ １０〜５０重量部、
平均重合度が４５０〜５５０である塩化ビニル樹脂Ｃ ３〜２５重量部、および
安定剤Ｄ １〜１５重量部を含有し、
再利用原料Ａ、塩化ビニル樹脂Ｂおよび塩化ビニル樹脂Ｃの合計量は１００重量部である組成物である。
In order to solve the above-mentioned problem, the hard vinyl chloride resin composition for injection molding according to claim 1 is
35-80 parts by weight of recycled material A or ground material of recycled material A comprising a hard vinyl chloride resin composition whose main component is a vinyl chloride resin having an average degree of polymerization of 900-1200,
10 to 50 parts by weight of vinyl chloride resin B having an average degree of polymerization of 560 to 850,
Containing 3-25 parts by weight of vinyl chloride resin C having an average degree of polymerization of 450-550, and 1-15 parts by weight of stabilizer D,
The total amount of recycled raw material A, vinyl chloride resin B and vinyl chloride resin C is 100 parts by weight.
請求項２に記載の発明の射出成形用硬質塩化ビニル樹脂組成物は、請求項１に記載の組成物において、耐衝撃改質剤Ｅ ２〜２０重量部をも含有することを特徴とする。
請求項３に記載の発明の射出成形用硬質塩化ビニル樹脂組成物は、請求項１または２のいずれかに記載の組成物において、安定剤Ｄは鉛化合物であることを特徴とする。
請求項４に記載の発明の射出成形用硬質塩化ビニル樹脂組成物は、請求項３に記載の組成物において、再利用原料Ａは鉛化合物を含有することを特徴とする。
請求項５に記載の発明の射出成形用硬質塩化ビニル樹脂組成物は、請求項２〜４のいずれかに記載の組成物において、耐衝撃改質剤Ｅはアクリル酸エステル重合体を含有するものであることを特徴とする。
The rigid vinyl chloride resin composition for injection molding according to the invention described in claim 2 is characterized in that it contains 2 to 20 parts by weight of the impact modifier E in the composition described in claim 1.
A rigid vinyl chloride resin composition for injection molding according to a third aspect of the present invention is characterized in that in the composition according to the first or second aspect, the stabilizer D is a lead compound.
A rigid vinyl chloride resin composition for injection molding according to a fourth aspect of the invention is characterized in that, in the composition according to the third aspect, the reuse raw material A contains a lead compound.
The hard vinyl chloride resin composition for injection molding of the invention according to claim 5 is the composition according to any one of claims 2 to 4, wherein the impact modifier E contains an acrylate polymer. It is characterized by being.
請求項６に記載の発明の射出成形用硬質塩化ビニル樹脂組成物の製造方法は、
再利用原料Ａを粉砕して粉砕品Ｖを製造する工程１、
再利用原料Ａ以外の原料および粉砕品Ｖを混合して原料混合品Ｗを製造する工程２、および
原料混合品Ｗを押出成形機により加熱、混練してペレットＸを製造する工程３を備える、
請求項１〜５に記載の組成物を製造する方法である。
The method for producing a hard vinyl chloride resin composition for injection molding of the invention according to claim 6 comprises:
Process 1 for pulverizing recycled material A to produce pulverized product V,
Comprising a step 2 for producing a raw material mixture W by mixing raw materials other than the recycled raw material A and a pulverized product V; and a step 3 for producing a pellet X by heating and kneading the raw material mixture W with an extruder.
It is a method of manufacturing the composition of Claims 1-5.
請求項７に記載の発明の射出成形用硬質塩化ビニル樹脂組成物からなる成形体の製造方法は、
再利用原料Ａを粉砕して粉砕品Ｖを製造する工程１、
再利用原料Ａ以外の原料および粉砕品Ｖを混合して原料混合品Ｗを製造する工程２、
原料混合品Ｗを押出成形機により加熱、混練してペレットＸを製造する工程３、および
ペレットＸを射出成形機により射出成形して成形体Ｙを製造する工程４を備える、
請求項１〜５に記載の組成物からなる成形体を製造する方法である。
A method for producing a molded body comprising the hard vinyl chloride resin composition for injection molding of the invention according to claim 7,
Process 1 for pulverizing recycled material A to produce pulverized product V,
Step 2 of mixing raw materials other than the recycled raw material A and the pulverized product V to produce a raw material mixture W,
A step 3 in which the raw material mixture W is heated and kneaded by an extruder to produce a pellet X, and a step 4 in which the pellet X is injection molded by an injection molding machine to produce a molded body Y.
It is a method of manufacturing the molded object which consists of a composition of Claims 1-5.
請求項８に記載の発明のますは、請求項７に記載の方法により得られるものである。
請求項９に記載の発明の継手は、請求項７に記載の方法により得られるものである。
請求項１０に記載の発明のますは、請求項１〜５に記載の射出成形用硬質塩化ビニル樹脂組成物からなるものである。
請求項１１に記載の発明の継手は、請求項１〜５に記載の射出成形用硬質塩化ビニル樹脂組成物からなるものである。
The invention according to claim 8 is obtained by the method according to claim 7.
The joint according to the ninth aspect is obtained by the method according to the seventh aspect.
The invention according to claim 10 comprises the rigid vinyl chloride resin composition for injection molding according to claims 1-5.
A joint according to an eleventh aspect of the present invention comprises the rigid vinyl chloride resin composition for injection molding according to any one of the first to fifth aspects.
塩化ビニル樹脂の廃材を再利用原料として有効に使用することができた。組成物は混練性が良好であり、得られる成形体は外観が良好なものであった。
The waste material of vinyl chloride resin could be used effectively as a recycled material. The composition had good kneadability, and the resulting molded product had a good appearance.
本明細書において、数値範囲が「下限数値〜上限数値」で示される場合、下限数値以上上限数値以下であることを意味する。
平均重合度は、ＪＩＳ Ｋ６７２０−２に準じて測定される。
また、硬質とは、引張弾性率が１０００００ｐｓｉ（７０００ｋｇｆ／ｃｍ２）以上であることを意味する。
まず、本発明の組成物について、主要成分である再利用原料Ａ、塩化ビニル樹脂Ｂ、塩化ビニル樹脂Ｃなどの順に説明する。次いで、組成物の製造、成形体の製造、評価などについて説明する。
In the present specification, when the numerical range is indicated by “lower limit numerical value to upper limit numerical value”, it means that the numerical value range is not less than the lower limit value and not more than the upper limit value.
The average degree of polymerization is measured according to JIS K6720-2.
Further, the term “hard” means that the tensile elastic modulus is 100,000 psi (7000 kgf / cm 2 ) or more.
First, the composition of the present invention will be described in the order of the reusable raw material A, vinyl chloride resin B, vinyl chloride resin C, etc., which are the main components. Subsequently, manufacture of a composition, manufacture of a molded object, evaluation, etc. are demonstrated.
再利用原料Ａは、平均重合度が９００〜１２００である塩化ビニル樹脂を主成分とする硬質塩化ビニル樹脂組成物からなる。本明細書における再利用とは、狭義の再利用（例えば市場で流通し使用された成形体または製造者から第三者に譲渡された成形体が粉砕されて使用されるなど）および再生（例えば製造者社内の裁ち落とし品または規格外れ成形体が粉砕されて使用されるなど）を含む広義の意味に解される。 The reuse raw material A is composed of a hard vinyl chloride resin composition whose main component is a vinyl chloride resin having an average degree of polymerization of 900 to 1200. Reuse in this specification means narrow reuse (for example, a molded product distributed and used in the market or a molded product transferred from a manufacturer to a third party is used after being pulverized) and regeneration (for example, It is understood in a broad sense including chopped-off products in the manufacturer's company or out-of-specification molded bodies being used after being crushed.
再利用原料Ａは、再利用という性質上、常に同じ組成のものを入手することはできないが、一定の条件を満足するものを使用する。
給排水用の硬質塩化ビニル樹脂パイプは、再利用原料Ａの主要な原料供給源である。該パイプは、平均重合度が９００〜１２００である塩化ビニル樹脂を主成分とする硬質塩化ビニル樹脂組成物の押出成形によって製造されるのが通常である。該パイプに代表される成形体は、後述すように適切な大きさに粉砕されて使用される。
再利用原料Ａとしては平均重合度９５０〜１１５０の塩化ビニル樹脂を主成分とするものが好ましく、平均重合度１０００〜１１００の塩化ビニル樹脂を主成分とするものがより好ましい。
The recycle raw material A cannot always be obtained with the same composition because of the nature of recycle, but a recycle material A that satisfies certain conditions is used.
The rigid polyvinyl chloride resin pipe for water supply / drainage is a main raw material supply source of the recycled raw material A. The pipe is usually manufactured by extrusion molding of a hard vinyl chloride resin composition mainly composed of a vinyl chloride resin having an average degree of polymerization of 900 to 1200. The molded body represented by the pipe is used after being pulverized to an appropriate size as described later.
As the recycle raw material A, a material mainly composed of a vinyl chloride resin having an average degree of polymerization of 950 to 1150 is preferred, and a material mainly comprising a vinyl chloride resin having an average degree of polymerization of 1000 to 1100 is more preferred.
再利用原料Ａは、上記塩化ビニル樹脂のほか、通常数％程度の安定剤、および滑剤を含有する。
後述する安定剤Ｄが鉛化合物である場合、再利用原料Ａは、硫化汚染防止のためおよび高い安定化効果のため、安定剤として鉛化合物を含有するものが好ましい。
再利用原料Ａは、可塑剤を実質的に含有しないものが好ましい。実質的に含有しないとは、含有割合が１０％以下、好ましくは７％以下、より好ましくは５％以下であることを意味する。
In addition to the vinyl chloride resin, the reusable raw material A usually contains about several percent of a stabilizer and a lubricant.
When the stabilizer D described later is a lead compound, it is preferable that the recycle raw material A contains a lead compound as a stabilizer for preventing sulfide contamination and for a high stabilizing effect.
The recycled material A is preferably substantially free of a plasticizer. “Not substantially contained” means that the content is 10% or less, preferably 7% or less, more preferably 5% or less.
塩化ビニル樹脂Ｂは、平均重合度が５６０〜８５０の塩化ビニル樹脂である。
塩化ビニル樹脂Ｃは、平均重合度が４５０〜５５０の塩化ビニル樹脂である。
塩化ビニル樹脂ＢおよびＣは、特定の割合で再利用原料Ａと併用されることにより、組成物は混練性の良好なものとなり、得られる成形体は外観の良好なものとなる。
The vinyl chloride resin B is a vinyl chloride resin having an average degree of polymerization of 560 to 850.
The vinyl chloride resin C is a vinyl chloride resin having an average degree of polymerization of 450 to 550.
When the vinyl chloride resins B and C are used in combination with the recycle raw material A at a specific ratio, the composition has good kneadability and the resulting molded article has good appearance.
再利用原料Ａ、塩化ビニル樹脂Ｂおよび塩化ビニル樹脂Ｃの合計量１００重量部を基準とする各成分の割合は以下のとおりである。
再利用原料Ａの割合は３５〜８０重量部であり、４０〜７５重量部が好ましく、４５〜７２重量部がより好ましい。
塩化ビニル樹脂Ｂの割合は１０〜５０重量部であり、１３〜４５重量部が好ましく、１７〜４２重量部がより好ましい。
塩化ビニル樹脂Ｃの割合は３〜２５重量部であり、４〜２０重量部が好ましく、５〜１８重量部がより好ましい。
The ratio of each component based on 100 parts by weight of the total amount of the recycled raw material A, the vinyl chloride resin B, and the vinyl chloride resin C is as follows.
The ratio of the reuse raw material A is 35 to 80 parts by weight, preferably 40 to 75 parts by weight, and more preferably 45 to 72 parts by weight.
The ratio of the vinyl chloride resin B is 10 to 50 parts by weight, preferably 13 to 45 parts by weight, and more preferably 17 to 42 parts by weight.
The ratio of the vinyl chloride resin C is 3 to 25 parts by weight, preferably 4 to 20 parts by weight, and more preferably 5 to 18 parts by weight.
再利用原料Ａの割合が少なすぎると、得られる成形体が耐熱性や引張強度の不足したものとなりやすいほか、廃材の再利用による省資源省エネルギーの効果が薄れる。再利用原料Ａの割合が多すぎると、得られる成形体が外観の悪いものとなる。 If the ratio of the reused raw material A is too small, the resulting molded product tends to have insufficient heat resistance and tensile strength, and the effect of resource saving and energy saving due to reuse of waste materials is diminished. When there are too many ratios of the reuse raw material A, the molded object obtained will become a thing with a bad external appearance.
塩化ビニル樹脂Ｂの割合が少なすぎると、組成物が混練性の悪いものとなり、得られる成形体が外観の悪いものとなる。塩化ビニル樹脂Ｂの割合が多すぎると、得られる成形体が耐熱性や引張強度の不足したものとなりやすいほか、廃材の再利用による省資源省エネルギーの効果が薄れる。 When the ratio of the vinyl chloride resin B is too small, the composition has poor kneadability and the resulting molded product has poor appearance. When the ratio of the vinyl chloride resin B is too large, the resulting molded product tends to be insufficient in heat resistance and tensile strength, and the effect of resource saving and energy saving due to reuse of waste materials is diminished.
塩化ビニル樹脂Ｃの割合が少なすぎると、組成物が混練性の悪いものとなり、得られる成形体が外観の悪いものとなる。塩化ビニル樹脂Ｃの割合が多すぎると、得られる成形体が耐熱性や引張強度の不足したものとなりやすいほか、廃材の再利用による省資源省エネルギーの効果が薄れる。 If the proportion of the vinyl chloride resin C is too small, the composition has poor kneadability and the resulting molded product has poor appearance. If the proportion of the vinyl chloride resin C is too large, the resulting molded product tends to be insufficient in heat resistance and tensile strength, and the effect of resource saving and energy saving due to reuse of waste materials is diminished.
再利用原料Ａをそのまま射出成形に使用すると得られる成形体が外観の悪いものとなるのは、再利用原料Ａのほとんどが押出成形仕様であり、比較的大きい平均重合度の塩化ビニル樹脂を主成分とするため流動性が小さく、射出成形機内では均一な溶融物になりにくいためと考えられる。射出成形機は押出成形機と比べて内容物にかかる剪断応力が小さいのでこのような結果を与えると考えられる。 When the reused raw material A is used for injection molding as it is, the resulting molded product has a poor appearance. Most of the reused raw material A has an extrusion molding specification, and a vinyl chloride resin having a relatively large average polymerization degree is mainly used. This is considered to be because the fluidity is small because it is a component and it is difficult to form a uniform melt in the injection molding machine. The injection molding machine is considered to give such a result because the shear stress applied to the contents is smaller than that of the extrusion molding machine.
比較的平均重合度が小さい塩化ビニル樹脂Ｂおよび塩化ビニル樹脂Ｃは、比較的小さい剪断応力によって均一な溶融物となりやすい組成物を与えるため、組成物の混練性の改善効果を発揮し、得られる成形体の外観を良好なものとする効果を発現するものと考えられる。 Since the vinyl chloride resin B and the vinyl chloride resin C having a relatively low average degree of polymerization give a composition that tends to be a uniform melt due to a relatively small shear stress, the effect of improving the kneadability of the composition is exhibited and obtained. It is thought that the effect which makes the external appearance of a molded object favorable is expressed.
比較的平均重合度が小さい塩化ビニル樹脂として、塩化ビニル樹脂Ｂまたは塩化ビニル樹脂Ｃのいずれかのみの使用では上記効果が不十分であり、塩化ビニル樹脂Ｂおよび塩化ビニル樹脂Ｃを併用することが重要である。その理由について以下のように推測している。 As a vinyl chloride resin having a relatively low average degree of polymerization, the use of either vinyl chloride resin B or vinyl chloride resin C is insufficient for the above effect, and vinyl chloride resin B and vinyl chloride resin C may be used in combination. is important. The reason is presumed as follows.
塩化ビニル樹脂Ｂは、再利用原料Ａの主成分である平均重合度が９００〜１２００である塩化ビニル樹脂と比較的近い平均重合度を有しているため、両者は相溶しやすく、組成物の混練性が良好になりやすい要素を含むと思われる。しかし塩化ビニル樹脂Ｂは、平均重合度が極端に小さいものではないため、組成物の混練性を改善する効果は小さいのではないかと思われる。 Since the vinyl chloride resin B has an average degree of polymerization relatively close to that of the vinyl chloride resin having an average degree of polymerization of 900 to 1200, which is the main component of the recycled material A, the two are easily compatible with each other. It seems that it contains an element that tends to improve the kneadability. However, since vinyl chloride resin B is not extremely small in average polymerization degree, it seems that the effect of improving the kneadability of the composition is small.
一方塩化ビニル樹脂Ｃは、平均重合度がかなり小さいものであるため、組成物の流動性を向上させやすく、組成物の混練性が良好になりやすい要素を含むと思われる。しかし塩化ビニル樹脂Ｃは、再利用原料Ａの主成分である塩化ビニル樹脂との平均重合度の差が比較的大きいため、両者は相溶しにくく、組成物の混練性が良好になりにくい要素となっているのではないかと思われる。 On the other hand, since the vinyl chloride resin C has a very small average degree of polymerization, it is likely to include elements that tend to improve the fluidity of the composition and improve the kneadability of the composition. However, since vinyl chloride resin C has a relatively large difference in average degree of polymerization from vinyl chloride resin, which is the main component of recycled raw material A, both are not compatible with each other, and the kneadability of the composition is difficult to improve. It seems that it has become.
比較的平均重合度が小さい塩化ビニル樹脂として、塩化ビニル樹脂Ｂおよび塩化ビニル樹脂Ｃを特定の割合で併用することによって、それぞれの長所が相乗的に作用して、組成物の混練性が特に良好となり、得られる成形体が外観の特に優れたものとなるのではないかと推測している。 As a vinyl chloride resin having a relatively low average degree of polymerization, by using a combination of vinyl chloride resin B and vinyl chloride resin C in a specific ratio, the respective advantages work synergistically, and the kneadability of the composition is particularly good. Thus, it is presumed that the resulting molded product has a particularly excellent appearance.
安定剤Ｄは、主に塩化ビニル樹脂が高温で分解するのを防止するための成分であり、組成物の混練工程、成形工程などにおいて組成物の変色、劣化、成形機の腐食などを低減する。安定剤Ｄとしては、塩化ビニル樹脂の安定剤として公知のものを使用することができる。安定剤Ｄとしては、三塩基性硫酸鉛、二塩基性亜燐酸鉛、塩基性亜硫酸鉛、二塩基性フタル酸鉛、二塩基性ステアリン酸鉛、ステアリン酸鉛などの鉛化合物、アルキル錫メルカプタイドなどのメルカプト錫化合物、アルキル錫マレートなどのマレート錫化合物、Ｃａ／Ｚｎ系安定剤として知られるものなどが挙げられる。
安定化の効果が優れるため、鉛化合物は好ましい安定剤である。
再利用原料Ａ、塩化ビニル樹脂Ｂおよび塩化ビニル樹脂Ｃの合計量１００重量部を基準とする安定剤Ｄの割合は、１〜１５重量部であり、２〜１０重量部が好ましい。
The stabilizer D is a component mainly for preventing the vinyl chloride resin from being decomposed at high temperatures, and reduces discoloration, deterioration of the composition, corrosion of the molding machine, etc. in the kneading process and molding process of the composition. . As the stabilizer D, those known as stabilizers for vinyl chloride resins can be used. As stabilizer D, lead compounds such as tribasic lead sulfate, dibasic lead phosphite, basic lead sulfite, dibasic lead phthalate, dibasic lead stearate, lead stearate, alkyl tin mercaptides, etc. Mercapto tin compounds, malate tin compounds such as alkyl tin malates, and those known as Ca / Zn stabilizers.
Lead compounds are preferred stabilizers because of their excellent stabilization effect.
The ratio of the stabilizer D based on 100 parts by weight of the total amount of the recycled raw material A, vinyl chloride resin B and vinyl chloride resin C is 1 to 15 parts by weight, and preferably 2 to 10 parts by weight.
本発明の組成物は、再利用原料Ａまたは再利用原料Ａの粉砕品、塩化ビニル樹脂Ｂ、塩化ビニル樹脂Ｃおよび安定剤Ｄを所定の割合で含有するものである。 The composition of the present invention contains reused raw material A or a pulverized product of recycled raw material A, vinyl chloride resin B, vinyl chloride resin C, and stabilizer D in a predetermined ratio.
本発明の組成物は、上記必須成分のほか、耐衝撃改質剤Ｅが添加されたものであってもよい。耐衝撃改質剤Ｅとしては、ゴム成分をコアとし、メチルメタクリレート共重合体をシェルとするコアシェル粒子が挙げられる。ゴム成分としてスチレンブタジエンゴムまたはブタジエンゴムが使用されたもの（ＭＢＳ）、アクリル酸エステル重合体からなるアクリルゴムが使用されたものは代表的な耐衝撃改質剤である。
ゴム成分としてアクリル酸エステル重合体からなるアクリルゴムが使用された改質剤（アクリルゴム系改質剤）は、組成物の混練性を良好にするため、本発明にとって好ましい耐衝撃改質剤である。
再利用原料Ａ、塩化ビニル樹脂Ｂおよび塩化ビニル樹脂Ｃの合計量１００重量部を基準とする耐衝撃改質剤Ｅの割合は、２〜２０重量部であり、４〜１５重量部が好ましい。
The composition of the present invention may contain an impact modifier E in addition to the above essential components. Examples of the impact modifier E include core-shell particles having a rubber component as a core and a methyl methacrylate copolymer as a shell. A rubber component in which styrene butadiene rubber or butadiene rubber is used (MBS) or an acrylic rubber made of an acrylate polymer is a typical impact resistance modifier.
A modifier (acrylic rubber-based modifier) in which an acrylic rubber made of an acrylate polymer is used as a rubber component is a preferable impact modifier for the present invention in order to improve the kneadability of the composition. is there.
The ratio of the impact modifier E based on 100 parts by weight of the total amount of the recycled material A, vinyl chloride resin B and vinyl chloride resin C is 2 to 20 parts by weight, and preferably 4 to 15 parts by weight.
本発明の組成物は、滑剤、安定化助剤、酸化防止剤、加工助剤、顔料、その他の添加剤が添加されたものであってもよい。
本発明の組成物は、実質的に可塑剤を含有しない。
The composition of the present invention may be added with a lubricant, a stabilizing aid, an antioxidant, a processing aid, a pigment, and other additives.
The composition of the present invention contains substantially no plasticizer.
次に組成物の製造方法について例示して説明する。下記工程１、２および３を備える方法は、組成物の製造方法として好ましい方法である。
工程１の前処理として、再利用原料Ａの洗浄などによる異物除去がなされることが好ましい。
Next, the production method of the composition will be exemplified and described. The method comprising the following steps 1, 2 and 3 is a preferred method for producing the composition.
As the pretreatment in step 1, it is preferable that foreign matters are removed by cleaning the reuse raw material A or the like.
工程１は、再利用原料Ａを粉砕して粉砕品Ｖを製造する工程である。本発明における粉砕は、破砕、解砕などの概念を含み、必ずしも粉となるまで砕くことに限定されない。粉砕品Ｖの大きさは、直径または長辺が１０ｍｍ以下のものが好ましく、７ｍｍ以下のものがより好ましく、５ｍｍ以下のものがさらに好ましい。粉砕品が大きすぎると後の工程が円滑に行えない場合がある。粉砕品の大きさの下限は特にないが、０．０１ｍｍ以上が好ましく、０．０５ｍｍ以上がより好ましい。必要以上に細かくしても無駄であるだけでなく、かえって取扱作業性が悪くなる場合がある。
粉砕には公知の粉砕機、破砕機、解砕機などを使用できる。
Step 1 is a step of manufacturing the pulverized product V by pulverizing the reused raw material A. The pulverization in the present invention includes concepts such as crushing and crushing, and is not necessarily limited to crushing until it becomes powder. The size of the pulverized product V is preferably 10 mm or less in diameter or long side, more preferably 7 mm or less, and still more preferably 5 mm or less. If the pulverized product is too large, the subsequent steps may not be performed smoothly. The lower limit of the size of the pulverized product is not particularly limited, but is preferably 0.01 mm or more, and more preferably 0.05 mm or more. Even if it is made finer than necessary, it is not only useless, but the handling workability may worsen.
For the pulverization, a known pulverizer, crusher, crusher, etc. can be used.
工程２は、再利用原料Ａ以外の原料（塩化ビニル樹脂Ｂ、塩化ビニル樹脂Ｃ、安定剤Ｄなど）および粉砕品Ｖを混合して原料混合品Ｗを製造する工程である。混合には公知の混合機を使用できる。 Step 2 is a step of manufacturing a raw material mixture W by mixing raw materials other than the reused raw material A (vinyl chloride resin B, vinyl chloride resin C, stabilizer D, etc.) and a pulverized product V. A known mixer can be used for mixing.
工程３は、原料混合品Ｗを押出成形機により加熱、混練してペレットＸを製造する工程である。
押出成形機中の熔融した組成物の流路にはメッシュが装着されることが好ましい。除去しきれなかった再利用原料Ａに由来する異物を除去するためにメッシュ装着は有効である。
組成物の混練性が良好であると該工程の単位時間あたりの処理量を多くでき、生産性が良好となる。
Step 3 is a step of manufacturing the pellet X by heating and kneading the raw material mixture W with an extruder.
A mesh is preferably attached to the flow path of the molten composition in the extruder. The mesh attachment is effective for removing foreign substances derived from the reused raw material A that could not be removed.
When the kneadability of the composition is good, the throughput per unit time of the process can be increased, and the productivity becomes good.
次に成形体の製造方法について例示して説明する。上記工程１、２および３ならびに下記工程４を備える方法は、成形体の製造方法として好ましい方法である。 Next, the manufacturing method of a molded object is illustrated and demonstrated. The method comprising the above steps 1, 2 and 3 and the following step 4 is a preferable method as a method for producing a molded article.
工程４は、ペレットＸを射出成形機により射出成形して成形体Ｙを製造する工程である。
組成物の混練性が良好であると外観の良好な成形体が得られやすい。
Step 4 is a step of manufacturing the molded body Y by injection molding the pellet X with an injection molding machine.
When the kneadability of the composition is good, a molded article having a good appearance can be easily obtained.
成形体の用途に特に制限はないが、給排水設備用の資材として好適に使用できる。小口径マンホール、公共ます、排水ますなどのます、下水継手などの継手は特に適した用途である。
Although there is no restriction | limiting in particular in the use of a molded object, It can use suitably as a material for water supply / drainage equipment. Fittings such as small-diameter manholes, public masers, drainers, and sewage fittings are particularly suitable applications.
（原料）
使用された原料は以下のとおりである。
１．再利用原料Ａ
・再利用原料Ａ１：塩化ビニル管・継手協会から譲渡された硬質塩ビ管または硬質塩ビ継手リサイクル材（押出成形体、塩化ビニル樹脂の平均重合度１０５０）
２．塩化ビニル樹脂Ｂ
・塩化ビニル樹脂Ｂ１：塩化ビニル樹脂粉末（平均重合度８００）
・塩化ビニル樹脂Ｂ２：塩化ビニル樹脂粉末（平均重合度６８０）
・塩化ビニル樹脂Ｂ３：塩化ビニル樹脂粉末（平均重合度６００）
３．塩化ビニル樹脂Ｃ
・塩化ビニル樹脂Ｃ１：塩化ビニル樹脂粉末（平均重合度５００）
４．安定剤Ｄ
・安定剤Ｄ１：鉛化合物からなる安定剤
５．耐衝撃改質剤Ｅ
・改質剤Ｅ１：アクリルゴム系改質剤
６．その他の添加剤
・添加剤Ｆ１：滑剤
・添加剤Ｆ２：加工助剤（メチルメタクリレート重合体）
・添加剤Ｆ３：顔料
(material)
The raw materials used are as follows.
1. Recycled raw material A
-Recycled raw material A1: Recycled material of rigid PVC pipes or rigid PVC joints transferred from the association of polyvinyl chloride pipes and joints (extruded product, average polymerization degree of vinyl chloride resin 1050)
2. Vinyl chloride resin B
・ Vinyl chloride resin B1: Vinyl chloride resin powder (average polymerization degree 800)
Vinyl chloride resin B2: Vinyl chloride resin powder (average polymerization degree 680)
・ Vinyl chloride resin B3: Vinyl chloride resin powder (average polymerization degree 600)
3. Vinyl chloride resin C
・ Vinyl chloride resin C1: Vinyl chloride resin powder (average polymerization degree 500)
4). Stabilizer D
Stabilizer D1: Stabilizer comprising a lead compound Impact resistance modifier E
・ Modifier E1: Acrylic rubber-based modifier6. Other additives / additives F1: Lubricants / additives F2: Processing aid (methyl methacrylate polymer)
Additive F3: Pigment
（組成物の製造）
１．工程１
予め水洗して異物が除去された再利用原料Ａ１を粉砕機により粉砕した。６ｍｍメッシュの金網を通過した粉砕品Ｖを回収した。
２．工程２
表１に記載された原料を混合機により混合して原料混合品Ｗを製造した。
３．工程３
原料混合品Ｗを押出成形機により加熱、混練、押出、切断して、直径３ｍｍ、長さ３ｍｍのペレットＸを製造した。
４．工程４
ペレットＸを射出成形機により射出成形して成形体Ｙを製造した。成形体Ｙとしては、公共ますおよび下水継手を製造した。
(Production of composition)
1. Process 1
The reused raw material A1 from which foreign matters were removed by washing with water in advance was pulverized by a pulverizer. The pulverized product V that passed through a 6 mm mesh wire mesh was collected.
2. Process 2
The raw material mixture W was manufactured by mixing the raw materials described in Table 1 with a mixer.
3. Process 3
The raw material mixture W was heated, kneaded, extruded, and cut by an extruder to produce pellets X having a diameter of 3 mm and a length of 3 mm.
4). Process 4
A pellet Y was produced by injection molding with an injection molding machine. As the molded body Y, public sewage and sewage joints were manufactured.
（評価）
１．射出成形体外観
成形体Ｙの外観を目視にて評価した。外観の評価基準は以下のとおりである。
◎：表面荒れはなかった。
○：わずかに表面荒れがあった。
△：部分的に目立つ表面荒れがあった。
×：数多くの目立つ表面荒れがあった。
(Evaluation)
1. Injection Molded Body Appearance The appearance of the molded body Y was visually evaluated. Appearance evaluation criteria are as follows.
A: There was no surface roughness.
A: There was a slight surface roughness.
(Triangle | delta): There was the surface roughness which was conspicuous partially.
X: There were many conspicuous surface roughnesses.
２．組成物の混練性
ロールミル（株式会社安田精機製作所製、試験用２本練りロール、２００Ｄ×５１４Ｌ）を使用して１８０℃に設定したロールミルに原料混合品Ｗ１５０ｇを供給し、原料混合品Ｗが溶融混練されてロールに巻き付く様子を観察した。評価基準は以下のとおりである。本評価は、工程３における混練が短時間で均一になされるか否か、または、工程４における射出成形機内での均一な溶融物が形成されやすいか否かの指標となる。
○：巻き付くまでの所要時間は１分以下であった。
×：巻き付くまでの所要時間は１分を超えた。
2. Kneadability of the composition The raw material mixture W is melted by supplying 150 g of the raw material mixture W to a roll mill set at 180 ° C. using a roll mill (manufactured by Yasuda Seiki Seisakusho Co., Ltd., two kneading rolls for testing, 200D × 514L). The state of being kneaded and wound around a roll was observed. The evaluation criteria are as follows. This evaluation serves as an index as to whether or not the kneading in step 3 is performed uniformly in a short time, or whether or not a uniform melt is easily formed in the injection molding machine in step 4.
○: The time required for winding was 1 minute or less.
X: The time required for winding exceeded 1 minute.
３．静的熱安定性
上記ロールミルで１８０℃３分間混練した原料混合品Ｗの組成物を使用して厚さ２ｍｍのシートを作成した。該シートを１８０℃の熱プレスで加熱して外観を目視にて評価した。本評価が良くない組成物は、得られる成形体が変色しやすい。
○：６０分後も変色はなかった。
△：６０分後に変色があった。
3. Static Thermal Stability A sheet having a thickness of 2 mm was prepared using the composition of the raw material mixture W kneaded at 180 ° C. for 3 minutes with the roll mill. The sheet was heated with a hot press at 180 ° C., and the appearance was visually evaluated. A composition with poor evaluation is likely to cause discoloration of the molded article obtained.
A: There was no discoloration after 60 minutes.
Δ: Discoloration occurred after 60 minutes.
４．組成物の溶融粘度
キャピログラフ（株式会社東洋精機製作所製、型式：１Ｃ）を使用して、温度１６５℃、ピストン降下速度１００ｍｍ／分の条件で、原料混合物Ｗの溶融粘度を測定した。
５．引張試験
ペレットＸの射出成形により１号ダンベル試験片を作成し、ＪＩＳ Ｋ７１１３に準拠して引張強度および破断時の伸び率を測定した。
６．ビカット軟化温度
ペレットＸの射出成形により試験片を作成し、ＪＩＳ Ｋ７２０６に準拠してビカット軟化温度を測定した。
７．シャルピー衝撃強度
ペレットＸの射出成形により試験片を作成し、ＪＩＳ Ｋ７１１１に準拠してシャルピー衝撃強度を測定した。
4). Melt viscosity of the composition The melt viscosity of the raw material mixture W was measured under the conditions of a temperature of 165 ° C. and a piston lowering speed of 100 mm / min using a capillograph (manufactured by Toyo Seiki Seisakusho, model: 1C).
5. Tensile test No. 1 dumbbell test piece was prepared by injection molding of pellet X, and the tensile strength and elongation at break were measured in accordance with JIS K7113.
6). Vicat softening temperature A test piece was prepared by injection molding of pellet X, and the Vicat softening temperature was measured according to JIS K7206.
7). Charpy impact strength A test piece was prepared by injection molding of pellet X, and Charpy impact strength was measured in accordance with JIS K7111.
評価結果を表１に示す。
比較例１は、塩化ビニル樹脂として再利用原料Ａ由来のもののみが使用された組成物であり、組成物の混練性が悪く、射出成形体の外観が悪いものであった。
比較例２〜４は、塩化ビニル樹脂として再利用原料Ａ由来のものおよび比較的平均重合度が小さい１種類の塩化ビニル樹脂が使用された組成物であり、組成物の混練性が悪く、射出成形体の外観も悪いものであった。
The evaluation results are shown in Table 1.
Comparative Example 1 was a composition in which only a material derived from the reused raw material A was used as the vinyl chloride resin. The kneadability of the composition was poor, and the appearance of the injection molded article was poor.
Comparative Examples 2 to 4 are compositions using a vinyl chloride resin derived from the reused raw material A and one kind of vinyl chloride resin having a relatively low average degree of polymerization, and the composition has poor kneadability and injection. The appearance of the molded body was also bad.
塩化ビニル樹脂の廃材を再利用原料として有効に使用することができる。再利用塩化ビニル樹脂が使用された射出成形用硬質塩化ビニル樹脂組成物を提供できる。 The waste material of the vinyl chloride resin can be effectively used as a recycled material. A rigid vinyl chloride resin composition for injection molding using a recycled vinyl chloride resin can be provided.
Claims (11)
ＪＩＳ Ｋ ６７２０−２による平均重合度が５６０〜８５０である塩化ビニル樹脂Ｂ １０〜５０重量部、
ＪＩＳ Ｋ ６７２０−２による平均重合度が４５０〜５５０である塩化ビニル樹脂Ｃ ３〜２５重量部、および
安定剤Ｄ １〜１５重量部を含有し、
再利用原料Ａ、塩化ビニル樹脂Ｂおよび塩化ビニル樹脂Ｃの合計量は１００重量部である射出成形用硬質塩化ビニル樹脂組成物。 35-80 parts by weight of recycled raw material A consisting of a hard vinyl chloride resin composition whose main component is a vinyl chloride resin having an average degree of polymerization of 900-1200 according to JIS K 6720-2, or recycled raw material A,
10 to 50 parts by weight of vinyl chloride resin B having an average degree of polymerization of 560 to 850 according to JIS K 6720-2,
Containing 3 to 25 parts by weight of vinyl chloride resin C having an average degree of polymerization of 450 to 550 according to JIS K 6720-2, and 1 to 15 parts by weight of stabilizer D,
A hard vinyl chloride resin composition for injection molding in which the total amount of the recycled material A, the vinyl chloride resin B and the vinyl chloride resin C is 100 parts by weight.
請求項１に記載の射出成形用硬質塩化ビニル樹脂組成物。 Also contains 2-20 parts by weight of impact modifier E,
The hard vinyl chloride resin composition for injection molding according to claim 1.
請求項１または２に記載の射出成形用硬質塩化ビニル樹脂組成物。 Stabilizer D is a lead compound,
The hard vinyl chloride resin composition for injection molding according to claim 1 or 2.
請求項３に記載の射出成形用硬質塩化ビニル樹脂組成物。 The reuse raw material A contains a lead compound.
The hard vinyl chloride resin composition for injection molding according to claim 3.
請求項２〜４のいずれかに記載の射出成形用硬質塩化ビニル樹脂組成物。 The impact resistance modifier E contains an acrylate polymer,
The hard vinyl chloride resin composition for injection molding according to any one of claims 2 to 4.
再利用原料Ａ以外の原料および粉砕品Ｖを混合して原料混合品Ｗを製造する工程２、および
原料混合品Ｗを押出成形機により加熱、混練してペレットＸを製造する工程３を備える
請求項１〜５のいずれかに記載の射出成形用硬質塩化ビニル樹脂組成物からなるペレットの製造方法。 Process 1 for pulverizing recycled material A to produce pulverized product V,
A process 2 for producing a raw material mixture W by mixing raw materials other than the reused raw material A and a pulverized product V, and a process 3 for producing a pellet X by heating and kneading the raw material mixture W with an extruder. The manufacturing method of the pellet which consists of the hard vinyl chloride resin composition for injection molding in any one of claim | item 1 -5.
再利用原料Ａ以外の原料および粉砕品Ｖを混合して原料混合品Ｗを製造する工程２、
原料混合品Ｗを押出成形機により加熱、混練してペレットＸを製造する工程３、およびペレットＸを射出成形機により射出成形して成形体Ｙを製造する工程４を備える請求項１〜５のいずれかに記載の射出成形用硬質塩化ビニル樹脂組成物からなる成形体の製造方法。 Process 1 for pulverizing recycled material A to produce pulverized product V,
Step 2 of mixing raw materials other than the recycled raw material A and the pulverized product V to produce a raw material mixture W,
The process 3 of heating and kneading | mixing the raw material mixture W with an extrusion molding machine and manufacturing the pellet X, and the process 4 of injection-molding the pellet X with an injection molding machine and manufacturing the molded object Y of Claims 1-5 are provided. The manufacturing method of the molded object which consists of the hard vinyl chloride resin composition for injection molding in any one.
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