What are the requirements for hot melt adhesive granules for binding teaching aids and books? A procurement list

Special requirements for teaching aids

Teaching aids are books that are frequently read and pulled by children,Hot melt adhesive granulesIt is necessary to ‘keep the page open and the spine intact’. When purchasing, don’t just look at the unit price, make a list of performance and check each item one by one.

Procurement Checklist

• Initial adhesion and penetration: The inner pages of 70-80g writing paper should also be firmly glued to prevent flipping.
• Low temperature toughness: North winter warehouses/classrooms do not have brittle or peeling pages.
• Softening point: The working temperature range of the glue binding machine matches, without carbonization.
• Environmental Protection: Through relevant harmful substance testing, the school conducts regular inspections in procurement.
• Batch stability: Each batch has small fluctuations in viscosity and softening point, and production line parameters do not need to be adjusted.
• Documents: Inspection report, certificate of conformity accompanying the goods for easy flight inspection.

How to conduct random inspection upon arrival

Sunlife hot melt adhesive’s educational auxiliary granules are supplied according to the above list, and Guangzhou Sunlife Trading can provide testing data with the batch for easy inspection upon receipt by the printing factory.

Frequently Asked Questions

Q1: Why is cheap glue prone to peeling?
Most of them are due to poor resin quality and insufficient penetration, and they will drop off when flipping through the pages.

Q2: Who is required by the school to obtain an environmental protection certificate from?
Legitimate suppliers should be able to provide third-party testing reports.