Practical case of bonding hot melt adhesive particles at the bottom of handmade paper bags: reducing rework from 30% to 2% per day

Customer pain point: The bottom of the paper bag always has adhesive peeling

A gift paper bag processing workshop in Guangzhou can produce 2000 handmade paper bags per day, using white milk adhesive at the bottom. The humidity in the southern region is high, causing slow curing and low initial adhesion of white latex. Even after workers have glued the bottom and left it for 2 hours, 30% of the adhesive still needs to be reworked, resulting in extremely low efficiency. Customer reminders are causing headaches.

SwitchHot melt adhesive granulesThe process

Under the recommendation of peers, Sunlife hot melt adhesive was found. After on-site inspection, the engineer recommended fast curing EVA hot melt adhesive particles with an opening time of 1.5 seconds and high initial adhesion, which can be applied with a small glue gun. First week trial production results:

• Apply adhesive immediately, release in 1.5 seconds, no need to wait for curing
• The rework rate has decreased from 30% to within 2%
• Single person daily production increased from 200 to 500 (saving waiting time)
• The adhesive layer is thin and transparent, and the bottom of the paper bag is beautiful without any adhesive marks

Cost account

Although the unit price of hot melt adhesive particles is about 40% higher than that of white latex, the amount used is only one-third (coating line width 3mm vs white latex coating surface 15mm), and the overall bonding cost is actually reduced by about 15%. Guangzhou Sunlife Trading provides monthly supply and small batch minimum order, which is very friendly to small processing workshops.

Frequently Asked Questions

• Q: Will the manual glue gun not stick firmly if the temperature is not enough?
  A: The outlet temperature of the glue gun should be above 160 ° C, and it is recommended to use a power of 80W or more; Choose the model with fast solidification, short opening time, and good fluidity for the adhesive particles.
• Q: Will the bottom of the paper bag peel after being glued and frozen in the refrigerator?
  A: EVA rubber particles can withstand -10 ° C without any problem; If a lower temperature is required, APAO based models can be replaced, and Guangzhou Sunlife Trading can provide low-temperature test samples.