共栄化成 Product Lineup

Our company is engaged in the manufacturing of plastic injection molded products. We offer various types of injection molding, including recycled PET molding, biomass molding, and two-color molding. Additionally, we have established a supply system that operates 24 hours a day, including Saturdays (according to the company calendar). Please feel free to contact us when you need our services. 【Business Activities】 ■ Manufacturing of plastic injection molded products *For more details, please download the PDF or feel free to contact us.

We would like to introduce our "Environmental Plastic Service." It is possible to achieve appropriate quality even with recycled materials that have unstable fluidity, foreign matter contamination, and high gas content. We create products that accommodate various formulations while balancing quality and cost. Please feel free to contact us when you need our services. 【Examples of Achievements】 ■Re_Plastic 100 ■Re_Plastic 75% ■Re_Plastic 50% *For more details, please download the PDF or feel free to contact us.

We support the coexistence of environmental considerations and cost reduction through injection molding utilizing recycled plastics. We have a wealth of mass production experience in everyday goods and miscellaneous parts. ■ Molding Technology for Problem Solving We address concerns such as shrinkage and warping due to differences in shrinkage rates when using recycled PP, as well as the reduction in impact resistance, with our years of expertise. By considering the balance of physical properties and adjusting the formulation for specific applications, we ensure performance levels comparable to about 80-90% of virgin materials. In addition to precise control of mold temperature and holding pressure, we minimize quality variations unique to recycled materials through flow control via gate design. ■ Advantages in Appearance and Cost In terms of appearance, we have stable solutions for black and dark colors, as well as proven results for lighter shades like gray. Cost reductions of approximately 5-15% compared to virgin materials are anticipated, strongly promoting the transition of existing products to environmentally friendly alternatives. For the challenge of wanting to advance environmental considerations but having concerns about quality, we propose optimal solutions through a triad of materials, molds, and conditions. *For more details, please download the catalog or feel free to contact us.

We provide high-quality injection molding using recycled ABS for stationery and daily necessities components. We support customers who want to balance environmental considerations with product quality from the material selection stage onward. ■Maintaining Strength and Aesthetics To address the major concern of reduced impact strength when using recycled ABS, we achieve properties close to virgin materials through our unique formulation ratio design. For appearance consistency, we ensure a stable finish with no color variation, particularly in white and dark colors, through precise color adjustments using dedicated colorants and masterbatches. We can mold products that maintain their value without giving the outdated impression often associated with recycled materials. ■Proven Implementation Benefits In terms of cost, we can achieve a reduction of 5-10% compared to virgin materials. By optimizing materials, molds, and molding conditions from the planning stage, we guarantee stable quality supply at mass production levels. We secure about 70-90% of the properties of virgin materials, contributing to the creation of practical products while minimizing environmental impact. *For more details, please download our catalog or feel free to contact us.

Our injection molding service utilizes recycled PET (rPET), which is one of our strengths. We have a proven track record of mass production using 100% recycled materials for major manufacturers, achieving both environmental consideration and dramatic cost reduction simultaneously. ■ Stable Supply and Quality Control We use materials that are clearly traceable, made from PET bottles collected from municipalities and re-commercialized through the Japan Container and Packaging Recycling Association's system. We have established a stable supply system necessary for mass production through continuous transactions with domestic recycling companies. ■ Thorough Measures Against Molding Defects We address cracking and release defects caused by hydrolysis through strict management of drying conditions and optimization of mold design. By fine-tuning injection speed and temperature according to the differences in flow characteristics for each lot, we prevent burrs and shorts, enabling stable molding in various colors such as transparent and white. A comparison based solely on raw material costs shows a reduction of about 40-50% compared to virgin materials, allowing us to contribute to CO2 reduction with high economic rationality. *For more details, please download our catalog or feel free to contact us.

We are a comprehensive manufacturer of injection molding utilizing recycled plastics. Not only do we use recycled materials, but we also optimize materials, molds, and molding conditions as a whole to establish a stable quality level suitable for mass production. ■ Advanced Molding Technology and Responsiveness We accommodate a variety of resins, including PP, ABS, and 100% recycled PET with proven molding performance. We offer solutions to the unique issues of recycled materials, such as "shrinkage and warping," "appearance variability," and "strength reduction," through techniques like formulation adjustments and flow control tailored to specific applications. In particular, for recycled PET, we use highly transparent raw materials that have undergone the Japan Container and Packaging Recycling Association's system and have established a stable supply system in collaboration with domestic recycling companies. ■ Benefits of Implementation Compared to virgin materials, cost reductions of 5-15% for PP and ABS, and approximately 40-50% in raw material costs for recycled PET can be expected. We can provide comprehensive proposals aimed at mass production to meet the needs of those who want to advance environmental initiatives but are concerned about quality, as well as those who wish to contribute to the environment while keeping costs down. Please feel free to consult us, even from the consideration stage. *For more details, please download our catalog or feel free to contact us.