Custom Hot Melt Adhesive Solutions

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Technical team composition and capabilities

The product development team currently consists of 15 people with an average tenure of over 5 years, covering hot melt adhesive systems such as SBC, EVA, polyolefin, etc. They have rich experience in new product development and product performance improvement projects, supporting the entire process from formula development to mass production, and continuously providing excellent products to the market and customers.

The technical service team currently consists of 5 people, who have been deeply involved in the application of hot melt adhesives such as labels, sanitary materials, wire harness tapes, packaging, mattresses, and home appliances for a long time. They provide comprehensive technical services such as product recommendation, adhesive testing, product application follow-up, and problem-solving, providing customers with high-quality product application solutions.

FAQ

Label Application

Hygiene Application

Q1. Label Application

Common problem	Root cause	Solution
Oozing	Special adhesive such as Deep freeze is easy to oozing because of low Tg	Adjust the tension of the coater
	Too high environment temperature	Turn on the cooling roll and set up a proper temperature
	Oozing performance of the adhesive is unsuitable for the coater equipment.	Replace a new adhesive with better oozing performance

Q2. Die-Cuttine Problem

Common problem	Root cause	Solution
Die-cuttine problem	Adhesive is not cut off	Strength the pressure of die-cutting roll
Die-cuttine problem	Die-cutting performance of the adhesive is unsuitable for the equipment	Replace a new adhesive with better die-cutting performance

Q3. Material fracutre during exhausting and coiling

Common problem	Root cause	Solution
Material fracutre during exhausting and coiling	Strength of exhausting material is too weak	Widen the width of exhausting material or slow down the die-cutting speed.

Q4. Label Lifting

Common problem	Root cause	Solution
Label lifting	Too low coating weight of adhesive	Increase the coating weight
Label lifting	Adhesive is unsuitable for the application	Replace a new adhesive with better tack on the certain application.

Q5. Low temperature performance is unsatifying

Common problem	Root cause	Solution
Low temperature performance is unsatifying	Water of the target object	Control the humidity and check the
Low temperature performance is unsatifying	Tg of the adhesive is unsuitable for the labeling temperature	Replace a new adhesive with lower Tg.

Q6. Melting Speed

Common problem	Root cause	Solution
Melting speed	Unsuitable frequency of adding adhesive into tank	Add adhesive when the tank level is near half
Melting speed	Too low application temperature	Set up a suitable application temperature.

Q7. Adhesive Aging After Coating

Common problem	Root cause	Solution
Adhesive aging after coating	Heat for too long time when coater stops	Adjust the temperature to about 100℃ when the coater is possible to stop over half an hour.
	Tank level is too low	Make sure the tank level is upper than 40%.
	Aging performance of the adhesive.	Replace a new adhesive with better aging performance.

Q1. Hygiene Application

Root cause	Solution
Too low application temperature	Set up a suitable application temperature.
Too low fogging air pressure	Set up a suitable air pressure.
Spray head is block up	Clean up the spray head

Q2. Flying threads of adhesive

Root cause	Solution
Too high application temperature	Set up a suitable application temperature.
Too high fogging air pressure	Set up a suitable air pressure.
Spray head is too close to subtrate	Adjust the distance between spray head and subtrate.

Q3. Elastic recoil

Root cause	Solution
Unsuitable application temperature	Set up a suitable application temperature.
Spray head is block up	Clean up the spray head
Elastic tremble	Drive down the elastic coating head

Q4. Corner seal stick to baby skin

Root cause	Solution
Tack of adhesive goes up after heated by body temperature	Replace a new adhesive with lower tack.

Q5. Odor issue

Root cause	Solution
Adhesive odor	Replace a new adhesive with better odor.
Substrate odor raise after heated by adhesive	Set up a suitable lower temperature or replace a new adhesive with low application temperature.

Q6. Adhesvie carbonization

Root cause	Solution
Aging performance	Replace a new adhesive with better aging performance.
Poor equipment maintenance	Suggest 2 times of equipment maintenance per year.

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Customization

R&D Case

Logistics Label Adhesive Development

Background: A customer used RURGA summer logistics label adhesive KA8541X and winter logistics label adhesive KA8539C. Traditional process is that coated sample was stored up for a few day, and then slitted into small roll, these mean there are time for adhesvie to cool down. In the late of 2024, A purchased a new coater with online slitting after coating. So this new coater require the adhesive to quickly cool down, but KA8541X and KA8539C can’t meet the demand. So RURGA develop KA128 and KA128S for this online slitting process and make a great success in customer site.

Technical Service Cases

Carton Sealing Adhesive Development

Background: B customer used RURGA QP3126B in carton box packaging and require great deep freeze performance because the final users are in north east region. A import a new carton box supplier ST and found batches tackless in store house. RURGA technical service went to customer site at once and find out the root cause of ST carton box. Next step, RURGA recommend QP3127A for ST carton box and make a great success.