Packaging industry covers a wide range, it requires quite a lot of types of hot melt adhesive, temperature, time, substrate, operational knowledge, today start with a different perspective to divide the different solutions to readers' convenience.
Divided by season
(1) The winter packing problems and solutions
<1>Air temperature：
Problems that may occur：Temperatures drop, the substrate temperature is reduced, the hot melt adhesive curing speed, decreased the permeability of the hot melt adhesive to the substrate, the effective contact area of the adhesive decline, resulting in the bonding effect decreases, the field of the production line carton substrate is damaged, stacking after that, the bonding strength is weak, glue and laminated substrate separation, as shown below.
Corresponding solutions：Increase the temperature of 10-20 degrees with plastic or heating carton.
<2>Glue low temperature resistance：
Problems that may occur：Temperature decreases, the cold tolerance of variation of the glue, the glue easy to become brittle, resulting in decline in adhesive strength, and seriously affect the bonding effect, the scene of the production line carton substrate is destroyed, and stacked after weak adhesive strength, cohesive failure within the glue, two bonding surface of the substrate has a glue.
Corresponding solutions：An appropriate increase in the volume of glue, or switch to a better resistance to low temperature glue.
<3>Too small amount of glue or glue lines too small:
Problems that may occur：As described above.
Corresponding solutions：Proposal to increase the appropriate amount of glue.
（2）The summer packaging problems and solutions
<1>Air temperature：
Problems that may occur：The temperature rose, the substrate temperature increases, the hot melt adhesive curing slowed. Decreases in cohesiveness of hot melt adhesive in a molten state, easily creep, a larger tension of the carton is easy to burst open, the adhesive surface and the nip surface have the glue residue.
Corresponding solutions：Reduce the temperature of glue temperature of 10-20 degrees, or to reduce packaging of products / cartons, maintain good warehousing conditions, well ventilated, cool, dry environment, away from direct sunlight, storage temperature should be below 35 ° C, away from the fire source and heat.
<2>The glue creep resistance temperature performance：
Problems that may occur：Rising temperatures, easy to glue creep, so that the adhesive strength decreased, seriously affecting the bonding effect, the glue have stayed at the surface, pressed surface traces of the watermark, as shown.
Corresponding solutions：Appropriate to reduce the volume of glue or switch to better resistance to high temperature glue types.
<3>Too small amount of glue or glue lines too small:
Problems that may occur：As described above.
Corresponding solutions：Proposal to increase the appropriate amount of glue.
Divided by Material
(1) Carton substrate
<1>Problems that may occur：1.1 On-site paper substrate is damaged
1.2 The cartons stacked, the bonding strength becomes weak
1.3 glue and substrate separation
1.4 glue bounce directly from the substrate
<2> Corresponding solutions：2.1 To increase the use of glue temperature
2.2 Improve the amount of glue
2.3 Replace carton
2.4 Replacement of another hot melt adhesive
(2) Hot melt adhesive charring
<1>Problems that may occur：1.1 glue box temperature too high
1.2 Temperature control problems
1.3 Surface oxidation
1.4 Poor thermal stability of the glue
1.5 glue packaging exceeds the time limit
1.6 Packaging using two different hot melt adhesive, to cause serious Drop problems
<2> Corresponding solutions：2.1 Reduce the temperature of the glue boxes
2.2 Check the temperature control system
2.3 To maintain the amount of plastic box of glue
2.4 Replace the better performance of the glue
2.5 Clean glue box, and replaced with new glue
2.6 use the same kind of hot melt adhesive
<3> Proposal: 3.1 the glue box temperature as low as possible, meet for the glue speed
3.2 Repeatedly to add a small amount of glue: glue bit more than 2/3 of the total plastic tank
3.3 The regular glue machine maintenance and maintenance
Divided by Manual
(1) Packaging brushed
<1> Problems that may occur：1.1 Nozzle problem
1.2 Nozzle and product too far away
1.3 Low glue temperature
1.4 The viscosity of the gum is too high
1.5 Prolonged heating glue
<2> Corresponding solutions：2.1 Nozzle worn or dirty, it is recommended that immediate cleaning or maintenance.
2.2 Adjust the distance :2-4cm
2.3 Improve the glue temperature
2.4 Raise the temperature of the use of glue
2.5 Replacement of the hot melt adhesive, and develop good glue habits
(2) Bonded ineffective
<1> Problems that may occur：1.1 Glue on one surface
1.2 Glue on both surfaces
1.3 Substrate surface treated
1.4 Tried the above method, still not satisfactory
<2> Corresponding solutions：2.1 Curing too fast, increasing the use of plastic temperature, or increase the amount of the glue and improve packaging Temperature
2.2 Curing too slow, lowering the temperature of the glue, or reduce the amount of the glue.
2.3 Raising the temperature or increase the amount of glue
2.4 Replacement of hot melt adhesive
Divided by season
(1) The winter packing problems and solutions
<1>Air temperature：
Problems that may occur：Temperatures drop, the substrate temperature is reduced, the hot melt adhesive curing speed, decreased the permeability of the hot melt adhesive to the substrate, the effective contact area of the adhesive decline, resulting in the bonding effect decreases, the field of the production line carton substrate is damaged, stacking after that, the bonding strength is weak, glue and laminated substrate separation, as shown below.
Corresponding solutions：Increase the temperature of 10-20 degrees with plastic or heating carton.
<2>Glue low temperature resistance：
Problems that may occur：Temperature decreases, the cold tolerance of variation of the glue, the glue easy to become brittle, resulting in decline in adhesive strength, and seriously affect the bonding effect, the scene of the production line carton substrate is destroyed, and stacked after weak adhesive strength, cohesive failure within the glue, two bonding surface of the substrate has a glue.
Corresponding solutions：An appropriate increase in the volume of glue, or switch to a better resistance to low temperature glue.
<3>Too small amount of glue or glue lines too small:
Problems that may occur：As described above.
Corresponding solutions：Proposal to increase the appropriate amount of glue.
（2）The summer packaging problems and solutions
<1>Air temperature：
Problems that may occur：The temperature rose, the substrate temperature increases, the hot melt adhesive curing slowed. Decreases in cohesiveness of hot melt adhesive in a molten state, easily creep, a larger tension of the carton is easy to burst open, the adhesive surface and the nip surface have the glue residue.
Corresponding solutions：Reduce the temperature of glue temperature of 10-20 degrees, or to reduce packaging of products / cartons, maintain good warehousing conditions, well ventilated, cool, dry environment, away from direct sunlight, storage temperature should be below 35 ° C, away from the fire source and heat.
<2>The glue creep resistance temperature performance：
Problems that may occur：Rising temperatures, easy to glue creep, so that the adhesive strength decreased, seriously affecting the bonding effect, the glue have stayed at the surface, pressed surface traces of the watermark, as shown.
Corresponding solutions：Appropriate to reduce the volume of glue or switch to better resistance to high temperature glue types.
<3>Too small amount of glue or glue lines too small:
Problems that may occur：As described above.
Corresponding solutions：Proposal to increase the appropriate amount of glue.
Divided by Material
(1) Carton substrate
<1>Problems that may occur：1.1 On-site paper substrate is damaged
1.2 The cartons stacked, the bonding strength becomes weak
1.3 glue and substrate separation
1.4 glue bounce directly from the substrate
<2> Corresponding solutions：2.1 To increase the use of glue temperature
2.2 Improve the amount of glue
2.3 Replace carton
2.4 Replacement of another hot melt adhesive
(2) Hot melt adhesive charring
<1>Problems that may occur：1.1 glue box temperature too high
1.2 Temperature control problems
1.3 Surface oxidation
1.4 Poor thermal stability of the glue
1.5 glue packaging exceeds the time limit
1.6 Packaging using two different hot melt adhesive, to cause serious Drop problems
<2> Corresponding solutions：2.1 Reduce the temperature of the glue boxes
2.2 Check the temperature control system
2.3 To maintain the amount of plastic box of glue
2.4 Replace the better performance of the glue
2.5 Clean glue box, and replaced with new glue
2.6 use the same kind of hot melt adhesive
<3> Proposal: 3.1 the glue box temperature as low as possible, meet for the glue speed
3.2 Repeatedly to add a small amount of glue: glue bit more than 2/3 of the total plastic tank
3.3 The regular glue machine maintenance and maintenance
Divided by Manual
(1) Packaging brushed
<1> Problems that may occur：1.1 Nozzle problem
1.2 Nozzle and product too far away
1.3 Low glue temperature
1.4 The viscosity of the gum is too high
1.5 Prolonged heating glue
<2> Corresponding solutions：2.1 Nozzle worn or dirty, it is recommended that immediate cleaning or maintenance.
2.2 Adjust the distance :2-4cm
2.3 Improve the glue temperature
2.4 Raise the temperature of the use of glue
2.5 Replacement of the hot melt adhesive, and develop good glue habits
(2) Bonded ineffective
<1> Problems that may occur：1.1 Glue on one surface
1.2 Glue on both surfaces
1.3 Substrate surface treated
1.4 Tried the above method, still not satisfactory
<2> Corresponding solutions：2.1 Curing too fast, increasing the use of plastic temperature, or increase the amount of the glue and improve packaging Temperature
2.2 Curing too slow, lowering the temperature of the glue, or reduce the amount of the glue.
2.3 Raising the temperature or increase the amount of glue
2.4 Replacement of hot melt adhesive