リーダー List of Products and Services

Our company offers "biomass heat sealants" that contribute to reducing environmental impact. These products maintain their functionality as heat sealants while utilizing biomass-derived materials to create environmentally friendly products. 【Features】 - Compatible with substrates such as CPP, HDPE, HIPS, PVC, and A-PET - Biomass content of 30% or 50% - Suitable for food and pharmaceutical packaging In addition to biomass heat sealants, we also offer water-based coatings as environmentally friendly products. *For more details, please refer to the PDF materials or feel free to contact us through our website.

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Leader Co., Ltd. is a proposal and development-oriented manufacturer engaged in the development and production of hot melt adhesives, sealant films, overcoating agents, and heat sealants. This case study collection includes numerous examples of problem-solving for aluminum foil and paper processing manufacturers, as well as packaging and pharmaceutical manufacturers. Please feel free to download and take a look. 【Featured Cases】 ■ Aluminum foil and paper processing manufacturer: LD#1050AS ■ Packaging and pharmaceutical manufacturer: W315 ■ Packaging and pharmaceutical manufacturer: Prototype BM8020 ■ Packaging and pharmaceutical manufacturer: Prototype SA-8050 *For more details, please refer to the PDF materials or feel free to contact us through our website.

• Packaging Bags

In the packaging and pharmaceutical manufacturing sector, there were concerns such as "We want to reduce the content of organic solvents to decrease VOC emissions." In response, we developed a coating agent that exhibits adhesion equal to or greater than that of conventional solvent types, using only alcohol and water as solvents. As a result, the use of water and alcohol as solvents allows for the reduction of VOC emissions, and the temperature at which adhesion begins in PTP packaging configurations is approximately -20°C (compared to our conventional products). [Case Overview] ■ Concerns - We want to use environmentally friendly coating agents. - We want to reduce the content of organic solvents to decrease VOC emissions. - We want to improve the coating environment for the coating agent. ■ Solution - Developed a coating agent that uses only alcohol and water as solvents. *For more details, please refer to the PDF document or feel free to contact us through our website.

• Packaging Bags

In the packaging and pharmaceutical manufacturing sector, there were concerns such as "wanting to bond aluminum foil and polyvinyl chloride" and "wanting to improve the coating environment." In response, we developed a water-based heat sealant that achieves performance equivalent to solvent types by applying it over a primer. As a result, since the solvent is water and alcohol, it has become possible to reduce VOC emissions when using the heat sealant, and there is almost no odor, which has improved the working environment. 【Case Summary】 ■ Concerns - Wanting to bond aluminum foil and polyvinyl chloride - Wanting to improve the coating environment - Seeking to make a water-based heat sealant for PVC that is environmentally friendly and cannot be solvent-based ■ Solution - Developed a water-based heat sealant that achieves performance equivalent to solvent types by applying it over a primer. *For more details, please refer to the PDF document or feel free to contact us through our website.

• Packaging Bags

In the packaging and pharmaceutical manufacturing sector, there were concerns such as "we want to use environmentally friendly coatings" and "we want to reduce the content of organic solvents." In response, we developed a coating agent with heat resistance and adhesion comparable to traditional solvent types by blending water-based raw materials. As a result, being water-based allows for promoting environmental measures and contributes to the reduction of VOCs when using the coating agent. 【Case Summary】 ■ Concerns - We want to use environmentally friendly coatings. - To reduce VOCs, we want to decrease the content of organic solvents. - We want to improve the coating application environment. ■ Solution - By blending water-based raw materials, we developed a coating agent with heat resistance and adhesion comparable to traditional solvent types. *For more details, please refer to the PDF document or feel free to contact us through our website.

• Packaging Bags

In the aluminum foil and paper processing industry, there were concerns such as "we want better release properties for sheet products" and "we want to impart slip and release properties to aluminum foil and paper." In response, we developed a coating agent using raw materials that provide good adhesion, slip, and release properties for paper and aluminum foil, with the solvent consisting only of alcohol and water. As a result, it became unnecessary to use release liners for sheet products, and we achieved good adhesion to aluminum foil and paper, enabling the imparting of slip and release properties. 【Case Summary】 ■ Concerns - We want better release properties for sheet products. - We want to impart slip and release properties to aluminum foil and paper. - We want to improve the coating environment for the coating agent. ■ Solution - We developed a coating agent using raw materials that provide good adhesion, slip, and release properties for paper and aluminum foil, with the solvent consisting only of alcohol and water. *For more details, please refer to the PDF document or feel free to contact us through our website.

• Packaging Bags

We would like to introduce examples of the adoption of gravure coating agents handled by Leader Co., Ltd. Our "heat sealant" is utilized in various fields, including pharmaceuticals and food, taking advantage of its high safety and hygiene properties as well as its adhesion between different materials. Additionally, our "hot melt adhesive" is employed for lid materials of refrigerated and frozen foods, leveraging its high safety and hygiene properties. If you have any interest in our products, we are happy to provide samples and discuss new development opportunities, so please feel free to contact us. [Adoption Examples] *Excerpt ■ PTP packaging, food packaging ■ Food trays ■ Automotive-related ■ Daily necessities ■ General packaging *For more details, please refer to the PDF materials or feel free to contact us through our website.

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"Bond Seal PPH#G15TS" is a hot melt adhesive for high softening point type PP containers that is free of antioxidants (BHA, BHT). It has good mouthfeel and can be used for lid materials of food containers such as dairy products. 【Features】 ■ High softening point ■ Good mouthfeel ■ Free of BHA and BHT (antioxidants) ■ Hygiene certification: Ministry of Health Notification No. 370, Ministry of Health Ordinance No. 52 (Dairy Ordinance) *For more details, please refer to the PDF materials or feel free to contact us through our website.

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"Bond Seal K-122" is a hot melt adhesive for the production of paper boxes such as food wraps. It has good heat resistance and workability. It can be used on substrates such as paper and cardboard, specifically for the production of paper boxes for food wraps. 【Features】 - Excellent heat resistance - Good workability *For more details, please refer to the PDF document or feel free to contact us through our website.

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Our company offers environmentally friendly products for various heat sealants and protective coatings used by gravure converters. Water-based heat sealants and overcoating agents have low organic solvent content, which not only improves the working environment but also effectively reduces VOC emissions and CO2 emissions. [Contents] ■ What are water-based heat sealants and overcoating agents? ■ Examples of applications for water-based heat sealants and overcoating agents ■ Case studies of water-based heat sealant usage ■ Heat sealants for PET and PP ■ About hot melt adhesives ■ Case studies of hot melt product adoption, etc. *For more details, please refer to the PDF materials or feel free to contact us through our website.

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Our company develops "coating agents and sealing agents" that are useful for the manufacturing of pharmaceutical packaging, food packaging, and other product packaging. We can propose products tailored to various concerns of manufacturers. For more details, please refer to our case studies and product materials. 【Case Study Overview】 ◎ "Anchor Coating Agent for Aluminum Vapor-Deposited Film" Developed a coating agent to enhance adhesion and laminate strength for manufacturers of flexible packaging for food and daily necessities. ◎ "Coating Agent Compatible with White Base Printing (SW Coat K2)" Proposed a coating agent for pharmaceutical manufacturers that eliminates the need for white printing under barcodes, reducing printing processes and ink consumption. ◎ "Heat Sealing Agent for PVC for PTP Packaging" Customized a heat sealing agent that allows for low-temperature adhesion for pharmaceutical manufacturers, achieving improved packaging speed. *For more details, please refer to the PDF materials or feel free to contact us through our website.

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"LD#PS Clear" is a heat sealant developed for polystyrene containers. It adheres well to polystyrene and can be used for pharmaceutical and food packaging. 【Features】 ■ Heat sealant for polystyrene (PS) ■ Excellent handling properties ■ Superior moisture resistance *For more details, please refer to the PDF document or feel free to contact us through our website.

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For those struggling with adhesives and coatings for food, pharmaceuticals, and daily necessities packaging. Our company manufactures and sells various types of 'gravure coating agents' for packaging. 【Do you have any of these issues?】 ■ Want to bond aluminum foil with polyvinyl chloride ■ Want to increase packaging speed ■ Want to lower the sealing temperature when sealing ■ Increased printing frequency has raised costs associated with printing (white ink and printing processes) ■ Difficult to maintain the strength of aluminum vapor deposition We would like to introduce case studies where our proposals have solved challenges for companies struggling with packaging! *For more details, please download the PDF materials or feel free to contact us through our website.

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A certain pharmaceutical manufacturer had the challenge of increasing the packaging speed and wanted to bond aluminum foil with polyvinyl chloride. In response, we customized the formulation of the conventional product to meet the customer's requirements. As a result, with the PTP packaging configuration, the temperature at which bonding begins was reduced to approximately 15°C compared to the conventional product, allowing for an increase in production speed and a reduction in processing costs. [Case Study] ■ Issues - Wanted to bond aluminum foil with polyvinyl chloride - Wanted to increase packaging speed - Wanted to lower the sealing temperature during sealing ■ Solution - Customized the formulation of the conventional product to meet the customer's requirements ★ For more details on the solution, effects, etc., please download the PDF document or feel free to contact us through our website.

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A certain pharmaceutical manufacturer had to print white ink under the GS1 barcode for printing purposes, which increased the number of printing processes and the associated costs. As a solution, they used "SW Coat K2," which allows for the production of printing foil with the same number of processes as before. As a result, they were able to read the GS1 barcode without the need for white solid printing, thus reducing costs compared to products with white solid printing. 【Case Study】 ■ Issues - They had to print white ink under the barcode for GS1 barcode printing, which increased the number of printing processes. - This led to increased costs for printing (white ink and printing processes). ★ For more details on the solution and its effects, please download the PDF document or feel free to contact us through our website.

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A certain manufacturer of soft packaging materials for food and daily necessities found that simply applying aluminum vapor to the film when producing aluminum vapor-deposited film resulted in the aluminum deposition easily coming off, making it difficult to achieve the laminate strength necessary for use as a bag. To address this, they developed an anchor coating agent to coat the film before the aluminum deposition process, ensuring a strong bond between the aluminum deposition and the film. As a result, even when the aluminum vapor-deposited film is laminated with other films or processed into bags, the aluminum deposition remains sufficiently adhered, protecting the contents and achieving the necessary laminate strength. [Case Study] ■ Issues - When producing aluminum vapor-deposited film, simply applying aluminum vapor to the film causes the aluminum deposition to easily come off. - It is difficult to achieve the laminate strength necessary for use as a bag. ★ For more details on the solution and its effects, please download the PDF document or feel free to contact us through our website.

• Packaging Bags

"W315" is a water-based emulsion type overcoat agent. It has excellent wettability and film formation on AL foil. It has excellent heat resistance and solvent resistance. Being a one-component type, it offers good handling properties. A matte type is also available. It can be used for overcoating agents for pharmaceutical packaging (PTP) and food packaging. 【Features】 ■ Water-based emulsion type ■ Good particle dispersion and high transparency of the film ■ Excellent film formation with superior heat and solvent resistance ■ Hygiene certification: Ministry of Health Notification No. 370 *For more details, please refer to the PDF materials or feel free to contact us through our website.

• Packaging Bags

The "SW Coat K2" is a special overcoat agent that allows barcode reading without the need for a base (white solid) print. It is a one-component curing type overcoat agent with excellent heat resistance and solvent resistance. It can be used for pharmaceutical packaging (PTP) and food packaging. 【Features】 ■ Barcode can be read without base printing ■ Excellent heat resistance and solvent resistance ■ Good handling properties due to being a one-component type ■ Hygiene certification: Ministry of Health Notification No. 370 *For more details, please refer to the PDF materials or feel free to contact us through our website.

• Packaging Bags

Overcoat agents are used for surface protection of various substrates such as plastic films and paper, as well as for imparting functionalities like release properties, slip properties, and heat resistance. This document introduces basic information about our overcoat agents, which are adopted in a wide range of fields, including their features and applications. It also includes specific case studies of their adoption. [Contents (excerpt)] ■ What is an overcoat agent? ■ Behind the scenes of overcoat agents for PTP packaging! ■ One layer, two roles! Special overcoat agents! ■ Case studies of our overcoat agents by product number *For more details, please refer to the document or feel free to contact us through our website.

• Other surface treatment equipment

This document introduces the "Heat Seal Agents" handled by Leader Co., Ltd. It includes sections such as "What is a Heat Seal Agent?", "Case Studies", and "Behind the Scenes of Low-Temperature Sealable Heat Seal Agents!" We invite you to read it. 【Contents】 ■ What is a Heat Seal Agent? ■ The Depth of Heat Seal Agents for Pharmaceutical and Food Packaging! ■ Behind the Scenes of Low-Temperature Sealable Heat Seal Agents! ■ Case Studies of Our Heat Seal Agents ■ Case Studies of Our Heat Seal Agents by Model Number ★ We are also considering new developments, so please feel free to consult with us. * For more details, please refer to the PDF document or feel free to contact us through our website.

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A "heat sealant" is a liquid adhesive in which the adhesive components are dispersed or dissolved in organic solvents or water, and it is used in various applications such as food packaging and electronic devices. This document introduces the basics of heat sealants, including "What is a heat sealant?" as well as examples of "Applications of heat sealants" and "Product system diagram of Leader Co., Ltd. (heat sealants)" using photos and diagrams. 【Contents】 ■ What is a heat sealant? ■ Examples of heat sealant applications ■ Examples of heat sealant applications by Leader Co., Ltd. ■ Product system diagram of Leader Co., Ltd. (heat sealants) *For more details, please refer to the PDF document or feel free to contact us through our company website.

• Other packaging materials

**Example of Development Request Content** - I want an adhesive to bond a new material. - I want to improve the performance of the adhesive I am currently using (e.g., increase adhesion strength). - I want to reduce costs. - I want to dissolve and disperse a certain raw material in a solvent. - I want a coating agent with these functions. - I want a coating agent that uses biomass raw materials, etc. Customization is possible according to your requests. Confidentiality agreements can be concluded. We can select raw materials that comply with various domestic and international regulations. **Company Introduction** To solve various issues such as 'de-plasticization,' 'greenhouse gases,' and 'food loss,' we are developing packaging materials with higher functionality. Our adhesives and coating agents from Leader Co., Ltd. may help solve the challenges of your new packaging and packaging development! Celebrating 50 years since its founding, Leader Co., Ltd. manufactures and sells coating agents and adhesives. Our products are widely used in pharmaceutical and food packaging applications, and our strength lies in our technological and developmental capabilities in fields that require high quality in terms of hygiene. We would like to assist companies considering the development of new functional packaging and business expansion, and we are currently seeking collaborative development partners.

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This document introduces examples of hot melt adhesives handled by Leader Co., Ltd. that have been adopted for refrigerated and frozen products. It includes sections such as "What is hot melt adhesive?", "Behind the scenes of hot melt adhesives for refrigerated and frozen food packaging!", and "Adoption points!". [Contents] ■ What is hot melt adhesive? ■ Behind the scenes of hot melt adhesives for refrigerated and frozen food packaging! ■ Examples of adoption for refrigerated and frozen products! ■ Adoption points! ■ Hot melt adhesives for refrigerated and frozen food packaging containers! ★ We are also considering new developments, so please feel free to consult with us. * For more details, please refer to the PDF document or feel free to contact us through our website.

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"Hot melt adhesive" refers to an adhesive that is solid at room temperature. It adheres by being melted and applied with heat, then solidifying upon cooling, and since it is composed solely of resin, it contains no organic solvents whatsoever. Additionally, it is non-combustible and does not contain flammable solvents, allowing for safe operation. [Excerpt of Contents] ■ What is hot melt adhesive? ■ Examples of applications for hot melt adhesive ■ Case studies of our hot melt adhesive ■ Product system diagram *For more details, please refer to the PDF materials or feel free to contact us through our website.

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"Hot melt adhesive" refers to an adhesive that is solid at room temperature. It bonds by being melted and applied with heat, then solidifying upon cooling, and since it is composed solely of resin, it contains no organic solvents. Additionally, it is flame-retardant and does not contain flammable solvents, allowing for safe operation. 【Features】 ■ 100% resin adhesive ■ Contains no water or organic solvents ■ Flame-retardant and safe to work with ■ No drying process required ■ Bonds by solidifying upon cooling *For more details, please refer to the PDF document or feel free to contact us through our website.

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"Disper #11 Modified" is a polyolefin-based heat sealant. It has excellent low-temperature sealing properties and is a non-PVC type product with outstanding moisture resistance. It can be used for food packaging and pharmaceutical packaging (PTP) heat sealants. 【Features】 ■ Non-PVC type ■ Excellent low-temperature sealing properties ■ Outstanding moisture resistance ■ Hygiene certification: Ministry of Health Notification No. 370 *For more details, please refer to the PDF materials or feel free to contact us through our website.

• Packaging Bags

"T-235(L) Clear" is a heat sealant with excellent slip properties developed for PET film. It can be used for food packaging. 【Features】 ■ Heat sealant for PET film ■ Excellent slip properties ■ Hygiene certification: Ministry of Health Notification No. 370 *For more details, please refer to the PDF document or feel free to contact us through our company website.

• Packaging Bags

"T-200-25 Clear" is a heat sealant developed for AL/AL. It has excellent blocking properties. It can be used for food packaging. 【Features】 ■ Heat sealant for AL/AL ■ Excellent blocking properties ■ Hygiene certification: Ministry of Health Notification No. 370 *For more details, please refer to the PDF document or feel free to contact us through our website.

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"S-No.B Clear Modification 4" is a heat sealant developed for CAB (Cellulose Acetate Butyrate) film. It excels in adhesion to CAB film and can be used for edge molding. 【Features】 ■ Heat sealant for CAB film ■ Excellent adhesion ■ Excellent heat-resistant adhesion *For more details, please refer to the PDF document or feel free to contact us through our website.

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"SFV Clear Modified 2" is a heat sealant developed for ventilation fan filters (non-woven fabric). It excels in adhesion between aluminum and non-woven fabric. It can be used as a heat sealant for non-woven fabrics. 【Features】 ■ Heat sealant for ventilation fan filters (non-woven fabric) ■ Excellent adhesion between aluminum and non-woven fabric ■ Superior handling properties ■ Flame retardant *For more details, please refer to the PDF document or feel free to contact us through our website.

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The "SC-25 Coat" is a heat sealant developed for AL/AL applications. It is characterized by its high adhesion strength. It can be used for food packaging. [Features] - Heat sealant for AL/AL - High adhesion strength - Hygiene certification: Ministry of Health Notification No. 370 *For more details, please refer to the PDF materials or feel free to contact us through our company website.

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"PET A-1 Clear" is a heat sealant with high adhesion to A-PET and PVC, excellent low-temperature sealing properties, and moisture resistance. It can be used for pharmaceutical packaging and food packaging. 【Features】 ■ Good adhesion to A-PET and PVC ■ Excellent low-temperature sealing properties and moisture resistance ■ Hygiene certification: Ministry of Health Notification No. 370 *For more details, please refer to the PDF materials or feel free to contact us through our website.

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"LP#37HR Clear Modified" is a primer for heat sealants used in pharmaceutical packaging. We offer various color matching products. It has excellent printability and adhesion, and also possesses heat resistance, eliminating issues such as text flow. It can be used as a primer for heat sealants in pharmaceutical packaging (PTP). 【Features】 ■ Primer for heat sealants used in pharmaceutical packaging ■ Excellent printability, adhesion, and heat resistance ■ One-component thermosetting type ■ Various color matching products available ■ Hygiene certification: Ministry of Health Notification No. 370 *For more details, please refer to the PDF materials or feel free to contact us through our website.

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"LD#S837G Clear" is a strong adhesive type and low viscosity type of the PVC-based heat sealant "LD#830 Clear Revised." It has excellent moisture resistance. It can be used for PVC-based heat sealants for pharmaceutical packaging (PTP) and food packaging. 【Features】 ■ Strong adhesive type and low viscosity type of "LD#830 Clear Revised" ■ Excellent handling properties ■ Hygiene certification: Ministry of Health Notification No. 370 *For more details, please refer to the PDF materials or feel free to contact us through our website.

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"LD#S555 Clear" is a heat sealant developed for CAB (Cellulose Acetate Butyrate) film. It excels in adhesion to CAB film and can be used for edge molding. 【Features】 ■ For CAB (Cellulose Acetate Butyrate) film ■ Excellent adhesion ■ Hygiene certification: Ministry of Health Notification No. 370 *For more details, please refer to the PDF materials or feel free to contact us through our website.

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"LD#PPM21" is a polyolefin-based heat sealant. It has superior low-temperature sealing properties compared to "Disper#11 Modified." It also excels in adhesion and leak resistance. It can be used for pharmaceutical packaging. 【Features】 ■ PVC-free type ■ Excellent low-temperature sealing properties ■ Superior adhesion and leak resistance *For more details, please refer to the PDF document or feel free to contact us through our website.

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"LD#PPI24 Coat NT" is a heat sealant of the modified polyolefin peel type. It is a non-PVC, non-toluene type that can be used for pharmaceutical packaging. 【Features】 ■ Non-PVC, non-toluene type ■ Peel type (easy peelability) ■ Hygiene certification: Ministry of Health Notification No. 370 *For more details, please refer to the PDF materials or feel free to contact us through our company website.

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"LD#PP23NT" is a polyolefin-based heat sealant that excels in high adhesion strength and moisture resistance, and is free of PVC and toluene. It can be used for pharmaceutical and food packaging. 【Features】 ■ High adhesion strength ■ PVC-free and toluene-free ■ Excellent moisture resistance ■ Good low-temperature sealing properties ■ Hygiene certification: Ministry of Health Notification No. 370 *For more details, please refer to the PDF materials or feel free to contact us through our website.

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"LD#PC18" is a water-based emulsion type heat sealant. It excels in hot tack properties compared to other low-temperature sealing grades of EVA. It can be used for pharmaceutical and food packaging. 【Features】 ■ Water-based emulsion type ■ Excellent adhesion to OPP and PET ■ Superior hot tack properties ■ Appearance is milky white *For more details, please refer to the PDF materials or feel free to contact us through our website.

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"LD#830 Clear Modified" is a heat sealant that offers good film smoothness and excellent low-temperature sealing properties. It also excels in moisture resistance. It can be used for PVC-based heat sealants for pharmaceutical packaging (PTP) and food packaging. 【Features】 - Good film smoothness and excellent low-temperature sealing properties - Excellent moisture resistance - Available in various colors - Hygiene certification: Ministry of Health Notification No. 370 *For more details, please refer to the PDF materials or feel free to contact us through our website.

• Packaging Bags

"LD#830MR Clear Modified" is a low-viscosity heat sealant type of "LD#830 Clear Modified." It has excellent handling properties. It can be used for food packaging and pharmaceutical packaging (PTP) PVC-based heat sealants. 【Features】 - Low-viscosity type of "LD#830 Clear Modified" - Good handling properties - Hygiene certification: Ministry of Health Notification No. 370 *For more details, please refer to the PDF document or feel free to contact us through our website.

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"IS#18-5 Matt D-4" is an easy-peel type heat sealant for AL/AL applications. It can be used for pharmaceutical packaging. 【Features】 ■ Heat sealant for AL/AL ■ Easy-peel type ■ Hygiene certification: Ministry of Health Notification No. 370 *For more details, please refer to the PDF document or feel free to contact us through our website.

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"IS#18-5 Clear" is a heat sealant that has good adhesion to PET film (untreated surface) and excellent sealing properties even with low-temperature drying. We also offer a matte type. 【Features】 ■ Good adhesion to PET film (untreated surface acceptable) ■ Excellent sealing properties even with low-temperature drying ■ Matte type available ■ Hygiene certification: Ministry of Health Notification No. 370 *For more details, please refer to the PDF materials or feel free to contact us through our website.

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The "Release Coating Agent for MFC" is a release coating agent for sheet products. By applying it to aluminum foil, it allows for the omission of lamination when pressing aluminum foil food packaging containers. It has excellent heat resistance and anti-blocking properties. It can be used for release coating agents for aluminum foil cups. 【Features】 ■ Excellent heat resistance and anti-blocking properties ■ Omission of lamination possible during the pressing of aluminum foil ■ Hygiene certification: Ministry of Health, Labour and Welfare Notification No. 370 *For more details, please refer to the PDF materials or feel free to contact us through our website.

• Packaging Bags

"LKT#30" is a lubricant and anti-blocking agent used for processing paper for food packaging. It can be used in the lamination of aluminum foil for food packaging. 【Features】 ■ Lubricant and anti-blocking agent for processing paper used in food packaging *For more details, please refer to the PDF materials or feel free to contact us through our website.

• Packaging Bags