CN102690517B - Chopsticks made of modified plastics and production process - Google Patents
Chopsticks made of modified plastics and production process Download PDFInfo
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- CN102690517B CN102690517B CN2012101841170A CN201210184117A CN102690517B CN 102690517 B CN102690517 B CN 102690517B CN 2012101841170 A CN2012101841170 A CN 2012101841170A CN 201210184117 A CN201210184117 A CN 201210184117A CN 102690517 B CN102690517 B CN 102690517B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/92—Measuring, controlling or regulating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
- B29C48/40—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders using two or more parallel screws or at least two parallel non-intermeshing screws, e.g. twin screw extruders
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92504—Controlled parameter
- B29C2948/92514—Pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92504—Controlled parameter
- B29C2948/92561—Time, e.g. start, termination, duration or interruption
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92504—Controlled parameter
- B29C2948/9258—Velocity
- B29C2948/9259—Angular velocity
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92504—Controlled parameter
- B29C2948/92704—Temperature
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92819—Location or phase of control
- B29C2948/92857—Extrusion unit
- B29C2948/92876—Feeding, melting, plasticising or pumping zones, e.g. the melt itself
- B29C2948/92885—Screw or gear
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92819—Location or phase of control
- B29C2948/92857—Extrusion unit
- B29C2948/92876—Feeding, melting, plasticising or pumping zones, e.g. the melt itself
- B29C2948/92895—Barrel or housing
Abstract
The invention discloses chopsticks made of modified plastics. Polyphenylene sulfone (PPSU) and polyether sulfone (PES) copolymer is subjected to modified injection; and the chopsticks prepared from the PPSU and PES copolymer have high coloring power, toughness and strength, are not degraded at high temperature of below 160DEG C, can be repeatedly disinfected at high temperature to avoid harmful substance volatilization, have smooth surfaces, corrosion resistance and wear resistance, does not have residual bacteria or mildew, are prevented from scalding mouth, and are sanitary and safe tableware.
Description
Technical field
The present invention discloses a kind of chopsticks of being made by modified plastics, is to make with PPSU (PPSU), PES (polyethersulfone) copolymeric material, and its production technique also is provided simultaneously, is the tableware of a kind of safety, health, belongs to tableware manufacturing technology field.
Background technology
The chopsticks of selling in the market mainly contain the bamboo wood chopsticks, plastics melamine chopsticks and stainless steel chopsticks etc.These several chopsticks more or less exist shortcoming.The bamboo wood chopsticks is easily mouldy, and is rotten; And plastics melamine chopsticks can volatilize the objectionable impuritiess such as trimeric cyanamide, formaldehyde when use and high-temperature sterilization.Stainless steel chopsticks generally all contains heavy metal except the medical grade stainless steel, and during edible high temperature food, due to its thermal conductivity, often scalds the phenomenon of mouth.
Summary of the invention
The present invention discloses a kind of chopsticks of being made by modified plastics, be to make with PPSU (PPSU), PES (polyethersulfone) copolymeric material, overcome easy to be living bacterium, the volatilization toxic substance that chopsticks that the materials such as existing bamboo wood chopsticks, plastics melamine chopsticks and stainless steel chopsticks make exist and scalded the familiar lacunas such as mouth.
The present invention also provides the production technique of above-mentioned chopsticks, is applicable to suitability for industrialized production.
The chopsticks that modified plastics of the present invention is made, by following material peace ratio of weight and number, made:
50 parts ~ 70 parts of PPSU, PES copolymerization powder (ratio each half), 3 parts ~ 15 parts, glass fibre, 3 parts ~ 15 parts, carbon fiber, 3 parts ~ 15 parts of basalt fibres, 0.2 part ~ 0.5 part of nanometer silver, 2 parts ~ 10 parts of calcium powders, 2 parts ~ 10 parts, zinc sulfide white, 0.1 part ~ 0.3 part of edible carbon black;
The production technique of the chopsticks that modified plastics of the present invention is made comprises the following steps:
Oven dry: PPSU, PES copolymerization powder are dried to water content and be no more than 0.02%;
Stir: above-mentioned materials is added to nanometer silver, calcium powder, zinc sulfide white, edible carbon black in proportion, and (600 rev/mins of rotating circular flow 2 minutes stirs in homogenizer; 800 rev/mins of rotating circular flow 1 minute.）；
Extruding pelletization: the material after stirring is put in twin screw extruder and is added glass fibre, carbon fiber, basalt fibre extruding pelletization (extrusion temperature: 330-360 ° of C; Extruded velocity: 110-180 rev/mins.）；
Injection moulding: the material after granulation is completed is put into the injection moulding machine injection moulding.Injection molding machine temperature: 330-360 ° of C; Die temperature: 120-180 ° of C; Injection pressure: 90-120Mpa; Injection speed: 60-80CM3/S; Cooling time: 50-90 seconds.
Polishing: corase grind: to the resin ground stone that adds 200L in the 400L polishing machine; Put into the 1000 pairs of chopsticks that will roughly grind; Add water to and do not have chopsticks; Put into 0.5 kilogram of polishing fluid; Start rotating circular flow 1-3 hours.
Fine grinding: to the radioceramic that adds 200L in the 400L polishing machine; Put into 1000 pairs of chopsticks that will refine; Add water to and do not have chopsticks; Put into 0.5 kilogram of polishing powder; Start rotating circular flow 1-3 hours.
By product of the present invention is detected and shows: tensile strength reaches 70Mpa, and flexural strength reaches 65Mpa.And not leaded, every heavy metals such as, mercury, sexavalent chromes.
Positively effect of the present invention is:Utilize PPSU, the material modified chopsticks of making of PES copolymerization material, strong coloring force, toughness and intensity are higher, below 160 ℃, high temperature does not decompose, high-temperature sterilization repeatedly, unharmful substance evaporates, and product surface is smooth, corrosion-resistant, wear-resistant, be difficult for residual bacterium, do not go mouldy; Having prevented and treated the chopsticks scald, is a kind of tableware of hygienic safety.
The accompanying drawing explanation
Fig. 1 is the structural representation of chopsticks of the present invention;
In figure, 1, the chopsticks body; 2, connecting hoop; 3, chopsticks cap.
Embodiment
Embodiment 1
Described chopsticks body 1 is made by following technique:
10 kilograms of PPSU, PES copolymerization powder (ratio each half) are put into to the baking oven 4 hours of 150 ° of C, dry to water content and be no more than 0.02%, PES powder after oven dry is added to 0.1 kilogram of nanometer silver, 2 kilograms of calcium powders, 1 kilogram of zinc sulfide white, 0.04 kilogram of edible carbon black, in homogenizer, stir 3 minutes to evenly (600 rev/mins of rotating circular flow 2 minutes; 800 rev/mins of rotating circular flow 1 minute.); Material after stirring is put in twin screw extruder and added 3 kilograms of glass fibre, 2 kilograms of carbon fibers, 2.5 kilograms of basalt fibres (three kinds of fibers are combined into mass of fibers) extruding pelletization (extrusion temperature: 330 ° of C; Extruded velocity: 160 rev/mins); Material after granulation is completed is put into the injection moulding machine injection moulding.(injection molding machine temperature: 340 ° of C; Die temperature: 160 ° of C; Injection pressure: 100Mpa; Injection speed: 70CM3/S; Cooling time: 60 seconds.）；
Polishing: corase grind: to the resin ground stone that adds 200L in the 400L polishing machine; Put into the 1000 pairs of chopsticks that will roughly grind; Add water to and do not have chopsticks; Put into 0.5 kilogram of polishing fluid; Start rotating circular flow 1 hour.
B fine grinding: to the radioceramic that adds 200L in the 400L polishing machine; Put into 1000 pairs of chopsticks that will refine; Add water to and do not have chopsticks; Put into 0.5 kilogram of fine grinding powder; Start rotating circular flow 1 hour; Make chopsticks body 1.
Embodiment 2
Described chopsticks body 1 is made by following technique:
10 kilograms of PPSU, PES copolymerization powder (ratio each half) are put into to the baking oven 4 hours of 150 ° of C, dry to water content and be no more than 0.02%, PES powder after oven dry is added to 0.1 kilogram of nanometer silver, 1 kilogram of calcium powder, 2 kilograms of zinc sulfide white, 0.06 kilogram of edible carbon black, in homogenizer, stir 3 minutes to evenly (600 rev/mins of rotating circular flow 2 minutes; 800 rev/mins of rotating circular flow 1 minute.); Material after stirring is put in twin screw extruder and added 2 kilograms of glass fibre, 3 kilograms of carbon fibers, 1.5 kilograms of basalt fibres (three kinds of fibers are combined into mass of fibers) extruding pelletization (extrusion temperature: 360 ° of C; Extruded velocity: 160 rev/mins.); Material after granulation is completed is put into the injection moulding machine injection moulding.(injection molding machine temperature: 330 ° of C; Die temperature: 180 ° of C; Injection pressure: 120Mpa; Injection speed: 60CM3/S; Cooling time: 80 seconds.）；
Polishing: corase grind: to the resin ground stone that adds 200L in the 400L polishing machine; Put into the 1000 pairs of chopsticks that will roughly grind; Add water to and do not have chopsticks; Put into 0.5 kilogram of polishing fluid; Start rotating circular flow 1.5 hours.
Fine grinding: to the radioceramic that adds 200L in the 400L polishing machine; Put into 1000 pairs of chopsticks that will refine; Add water to and do not have chopsticks; Put into 0.5 kilogram of fine grinding powder; Start rotating circular flow 2 hours; Make chopsticks body 1.
Embodiment 3
Described chopsticks body 1 is made by following technique:
10 kilograms of PPSU, PES copolymerization powder (ratio each half) are put into to the baking oven 4 hours of 150 ° of C, dry to water content and be no more than 0.02%, PES powder after oven dry is added to 0.1 kilogram of nanometer silver, 2 kilograms of calcium powders, 1.5 kilograms of zinc sulfide white, 0.03 kilogram of edible carbon black, in homogenizer, stir 3 minutes to evenly (600 rev/mins of rotating circular flow 2 minutes; 800 rev/mins of rotating circular flow 1 minute.); Material after stirring is put in twin screw extruder and added 3 kilograms of glass fibre, 3 kilograms of carbon fibers, 1 kilogram of basalt fibre (three kinds of fibers are combined into mass of fibers) extruding pelletization (extrusion temperature: 360 ° of C; Extruded velocity: 180 rev/mins.); Material after granulation is completed is put into the injection moulding machine injection moulding.(injection molding machine temperature: 360 ° of C; Die temperature: 120 ° of C; Injection pressure: 90Mpa; Injection speed: 80CM3/S; Cooling time: 50 seconds.）；
Polishing: corase grind: to the resin ground stone that adds 200L in the 400L polishing machine; Put into the 1000 pairs of chopsticks that will roughly grind; Add water to and do not have chopsticks; Put into 0.5 kilogram of polishing fluid; Start rotating circular flow 1.5 hours.
Fine grinding: to the radioceramic that adds 200L in the 400L polishing machine; Put into 1000 pairs of chopsticks that will refine; Add water to and do not have chopsticks; Put into 0.5 kilogram of fine grinding powder; Start rotating circular flow 1 hour; Make chopsticks body 1.
Embodiment 4
Described chopsticks cap 3 is made by following technique:
PPSU, PES copolymerization powder (ratio each half) are put into to the baking oven 4 hours of 150 ° of C, dry to water content and be no more than 0.02%, the powder after drying is put into to the injection moulding machine injection moulding.
Injection moulding: injection molding machine temperature: 360 ° of C; Die temperature: 170 ° of C; Injection pressure: 100Mpa; Injection speed: 80CM3/S; Cooling time: 90 seconds;
Polishing: corase grind: to the resin ground stone that adds 200L in the 400L polishing machine; Put into the 1000 pairs of chopsticks that will roughly grind; Add water to and do not have chopsticks; Put into 0.5 kilogram of polishing fluid; Start rotating circular flow 3 hours.
Fine grinding: to the radioceramic that adds 200L in the 400L polishing machine; Put into 1000 pairs of chopsticks that will refine; Add water to and do not have chopsticks; Put into 0.5 kilogram of fine grinding powder; Start rotating circular flow 3 hours; Make chopsticks cap 3.
Embodiment 5
Described chopsticks cap 3 is made by following technique:
PPSU, PES copolymerization powder (ratio each half) are put into to the baking oven 4 hours of 150 ° of C, dry to water content and be no more than 0.02%, the powder after drying is put into to the injection moulding machine injection moulding.
Injection moulding: injection molding machine temperature: 350 ° of C; Die temperature: 180 ° of C; Injection pressure: 110Mpa; Injection speed: 80CM3/S; Cooling time: 80 seconds.）；
Polishing: corase grind: to the resin ground stone that adds 200L in the 400L polishing machine; Put into the 1000 pairs of chopsticks that will roughly grind; Add water to and do not have chopsticks; Put into 0.5 kilogram of polishing fluid; Start rotating circular flow 3 hours.
Fine grinding: to the radioceramic that adds 200L in the 400L polishing machine; Put into 1000 pairs of chopsticks that will refine; Add water to and do not have chopsticks; Put into 0.5 kilogram of fine grinding powder; Start rotating circular flow 3 hours; Make chopsticks cap 3.
Embodiment 6
Described connecting hoop 2 is made by following technique:
The blank copper pipe is put into to ready-made mould, and through multi-drawing, box cupling 2 is made in extrusion molding.
The hollow tubular that connecting hoop 2 is made for copper material (can be square-tube-shaped or cylindrical), the caliber of connecting hoop 2 is inlayed and is connected for wringing fit with chopsticks cap 3 with chopsticks body 1.
Embodiment 7
According to shown in Figure 1, chopsticks of the present invention comprise: chopsticks body 1, connecting hoop 2, chopsticks cap 3 three parts form, and wherein, chopsticks body 1 and chopsticks cap 3 are inlayed 2 embeddings by connecting hoop respectively and be integrated.
Test case
By the chopsticks to above embodiment production, carry out the advantage that Performance Detection shows chopsticks of the present invention:
The chopsticks that above embodiment produces, strong coloring force, toughness and intensity are higher, below 160 ℃, high temperature does not decompose, and heat conduction is slow, repeatedly high-temperature sterilization, unharmful substance evaporates, and product surface is smooth, corrosion-resistant, wear-resistant, be difficult for residual bacterium, do not go mouldy.
Similar melamine chopsticks comparison on the chopsticks that the present invention manufactures and market
The experiment product:
1) similar melamine chopsticks on market
2) chopsticks of the present invention's manufacture
Experimental technique: 1
High temperature 100 degree poach, 10 minutes time.
Conclusion: the melamine chopsticks volatilize niff; The chopsticks that the present invention manufactures are without any smell.
Experimental technique: 2
Universal testing machine is surveyed tensile strength
Conclusion: melamine chopsticks tensile strength is 50Mpa; The chopsticks tensile strength of manufacture of the present invention is 70 Mpa.
Experimental technique: 3
Universal testing machine lateral bending Qu Qiangdu
Conclusion: melamine chopsticks flexural strength is 55 Mpa; The chopsticks flexural strength of manufacture of the present invention is 65 Mpa.
Experiment conclusion: the chopsticks safety that the present invention manufactures, health; Good toughness, intensity is high.
Claims (2)
1. chopsticks that modified plastics is made, by following material, made by ratio of weight and the number of copies:
Ratio is 0.1 part ~ 0.3 part of 2 parts ~ 10 parts, 2 parts ~ 10 parts of 0.2 part ~ 0.5 part of 3 parts ~ 15 parts of 3 parts ~ 15 parts, 3 parts ~ 15 parts, 50 parts ~ 70 parts of PPSU, PES copolymerization powders, glass fibre, carbon fiber, basalt fibres, nanometer silver, calcium powders, the zinc sulfide white of 1:1, edible carbon black.
2. the production technique of the chopsticks made of modified plastics according to claim 1 comprises the following steps:
A oven dry: PPSU, PES copolymerization powder are dried to water content and are no more than 0.02%;
B stirs: above-mentioned materials is added to nanometer silver, calcium powder, zinc sulfide white, edible carbon black, in homogenizer, stir; 600 rev/mins of rotating circular flow 2 minutes; 800 rev/mins of rotating circular flow 1 minute;
The c extruding pelletization: the material after stirring is put in twin screw extruder and is added glass fibre, carbon fiber, basalt fibre extruding pelletization, extrusion temperature: 330-360 ° of C; Extruded velocity: 110-180 rev/mins;
The d injection moulding: the material after granulation is completed is put into the injection moulding machine injection moulding;
Injection molding machine temperature: 330-360 ° of C; Die temperature: 120-180 ° of C; Injection pressure: 90-120MPa; Injection speed: 60-80cm
3/ s; Cooling time: 50-90 seconds;
E polishing: corase grind: to the resin ground stone that adds 200L in the 400L polishing machine; Put into the 1000 pairs of chopsticks that will roughly grind; Add water to and do not have chopsticks; Put into 0.5 kilogram of polishing fluid; Start rotating circular flow 1-3 hours;
Fine grinding: to the radioceramic that adds 200L in the 400L polishing machine; Put into 1000 pairs of chopsticks that will refine; Add water to and do not have chopsticks; Put into 0.5 kilogram of polishing powder; Start rotating circular flow 1-3 hours.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2012101841170A CN102690517B (en) | 2012-06-06 | 2012-06-06 | Chopsticks made of modified plastics and production process |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012101841170A CN102690517B (en) | 2012-06-06 | 2012-06-06 | Chopsticks made of modified plastics and production process |
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| Publication Number | Publication Date |
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| CN102690517A CN102690517A (en) | 2012-09-26 |
| CN102690517B true CN102690517B (en) | 2013-11-20 |
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| CN2012101841170A Active CN102690517B (en) | 2012-06-06 | 2012-06-06 | Chopsticks made of modified plastics and production process |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104744940A (en) * | 2013-12-28 | 2015-07-01 | 李红国 | Process for manufacturing composite material water pipe special for drinking water |
| CN106313480A (en) * | 2015-06-17 | 2017-01-11 | 江苏君华特种工程塑料制品有限公司 | Continuous extrusion moulding method of PPSU bar material |
| CN108047719A (en) * | 2017-12-19 | 2018-05-18 | 赛巴蒂奥智能家居家装（江苏）有限公司 | A kind of chopsticks and its production method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE19620420A1 (en) * | 1996-05-21 | 1997-11-27 | Basf Ag | High-performance plastic cutlery, especially chopsticks |
| CN2359988Y (en) * | 1999-03-11 | 2000-01-26 | 叶兴山 | Combination chopsticks |
| CN1164664C (en) * | 2001-04-17 | 2004-09-01 | 北京创源基业自动化控制技术研究所 | Polyolefine composition with high content of efficient inorganic modifier, Its preparing process and chopsticks made of it |
| US20050272853A1 (en) * | 2003-08-26 | 2005-12-08 | Solvay Advanced Polymers | Aromatic polycondensation polymer compositions exhibiting enhanced strength properties |
| CN101579187B (en) * | 2008-05-12 | 2012-01-25 | 深圳富泰宏精密工业有限公司 | Chopsticks |
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Address after: 264211 North West Kaiyuan Road, Lingang Economic and Technological Development Zone, Weihai, Shandong Patentee after: Shandong Hao Ran special plastic Limited by Share Ltd Address before: 264211 North West Kaiyuan Road, Weihai Industrial Zone, Shandong Patentee before: Shandong Horan Super Engineering Plastics Co.,Ltd. |