65 ℃ ~ 180 ℃. Does not contain any solvents 100% solid, it can meet the most stringent air pollution control regulations, but also almost no risk of fire or explosion.
Except, hot melt adhesive on the user still following advantages:
● curing speed, reducing the amount of compression needed for the glue, so production speed can be increased, the device also saves space.
● may then be in too aqueous (hydrophobic) surface, without the use of a wet stream agent. So with water resistance, storage stability is also good.
● Because 100% solid content is fully available and therefore less waste, can reduce transportation and storage costs.
● wide range of substrates can then be automated.
1, Features and Uses
Hot melt adhesive is widely used, such as energy prices with the equipment and material cost effective it can become. Packaging industry accounts for over 50% of hot melt adhesive application market, these packaging materials include folding of the carton, corrugated boxes, cans laminated materials, tapes and other overlapping synthetic coating
Membrane material. Non-woven textile containing sanitary napkins, disposable diapers, clothing fitting, bonding or the like sutures. Woven products, including garments, seam tape, carpet backing. Office supplies including tapes, documents, self-adhesive labels, envelopes, file folders. Parts portfolio includes soft drinks, electronics, books, packaging, furniture, shoes, handicrafts DIY and carpentry, plywood and so on.
(1) Viscosity
Melt viscosity is an important indicator of workability, by means of a heater because hot melt adhesive must be used, namely the coating machine. Roughly speaking different industries, different uses, different things of different coating machines, coating way, we have determined the melting
Viscosity. Herein should note
Is from the same purposes, but with the way the coating machine, the viscosity of the cooked sol of different vendors are also different meaning.
(2) curing time, opening hours
The use of hot melt adhesive to a heat medium, after cooling colloid that is then complete. Therefore, care must be taken to control the use of time operation.
Curing time (setting time): refers to the coating can be formed after a short time and then the best.
Opening hours (open time): refers applied to the most pressing allowable time.
(3) Temperature Resistance:
EVA-based hot melt adhesive composition of the restrictions in its own right, so in the heat of the situation at a constant temperature between 40 ℃ ~ 65 ℃, the main thing is generally also EVA melting point between 40 ℃ ~ 70 ℃, while the TPR itself The heat resistance is better, but often have added plasticizers reduce its
Heat resistance.
(4) according to sex
Then talk about sex, its main focus is been with the material, according to the general classification of metal, plastic, paper, wood, etc. or according to customer requirements of the then status, select the appropriate model, appropriate products, Later avoid problems, save service time. Cooked melt down
Tour a wide range of users, which cover a wide range, the market segment is hereby major purpose to make a detailed breakdown of the table.
Item / Category Use
First, electronic categories: fixed-line group, PC board electronic circuit
Second, the Wood: Furniture, desks, tables, sound, carpentry combination
Third, the packaging industry: food from the carton, paper, cigarette filters roll, cigarette sealed boxes, Tetra Pak straw and other food packaging, book covers bonding, cable, wireless conjugated system level, copper class
Fourth, the system of the present: plywood, plate and connected and other woodworking combination
V. plywood: diapers category, miscellaneous use
Six pressure-sensitive: stuffed toys, dolls, hair ornaments, picture frames
Seven, toys, jewelry, crafts, miscellaneous categories: bonding, patching, sealing
Eight, DIY (Do It Yourself)
First, the electronics industry
(A) Use of electronic products, hot melt adhesive types and uses.
1, speakers, music stand: Straight V, horizontal V, triangular wooden reinforcement, welt trim.
2, televisions, monitors: electronic parts fixed image tube and bias must ring sealing.
3, PC board parts fixed row weaving, packaging and then into corrugated boxes and other cushioning material.
(Ii) UL hot melt adhesive industry
1, power supply
2, computer combination products
3, TV set
4, terminals
5, integrated circuit processing
6, transformers, coils
7, computer heads
8, rectifier
9, car audio device
10, Switching Power Supply
Second, Wood
Classification: (a) welt (b) Wood (c) reinforcing (a) welt:
(2) semi-automatic machine
a. Advantages: ① available at irregular edges. ② low temperature operation.
b. Disadvantage: ① can not repair the front and rear. ② can not be trimmed. ③ high consistency inoperable. ④ operation slow aging.
(3) automatic machine
a. Advantages: ① operating speed. ② can be attached to curved edges. ③ around repairable. ④ can be attached to the wood. ⑤ repairable curved edges.
(4) Then the material
① raw material: fiber of the board, particle board, red cypress, Meranti, wood, plywood, wood core board, 0AK, original wood.
② sapwood: PVC leather (soft and hard), 0AK leather, non-woven sheet, solid wood.
(5) plastic way:
① the raw material of plastic: automatic machine. ② sapwood glue: manual, automatic machines are applicable.
(6) followed by:
① straight money point: Jieke automatic and manual machine. ② inside and outside the arc point: manual machine. ③ Bentwood edge point: automatic machine.
(B) Wood
1, Product: tape cassette, video cassette.
2, classification: straight V, horizontal V, separator, V-cut.
(1) Straight V:
a. Automatic spray.
b. Homemade funnel-type melting furnace.
c. Simple machines.
d. Material: plywood, composite boards, fiberboard.
(A) welt:
(2) semi-automatic machine
a. Advantages: ① available at irregular edges. ② low temperature operation.
b. Disadvantage: ① can not repair the front and rear. ② can not be trimmed. ③ high consistency inoperable. ④ operation slow aging.
(3) automatic machine
a. Advantages: ① operating speed. ② can be attached to curved edges. ③ around repairable. ④ can be attached to the wood. ⑤ repairable curved edges.
(4) Then the material
① raw material: fiber of the board, particle board, red cypress, Meranti, wood, plywood, wood core board, 0AK, original wood.
② sapwood: PVC leather (soft and hard), 0AK leather, non-woven sheet, solid wood.
(5) plastic way:
① the raw material of plastic: automatic machine. ② sapwood glue: manual, automatic machines are applicable.
(6) followed by:
① straight money point: Jieke automatic and manual machine. ② inside and outside the arc point: manual machine. ③ Bentwood edge point: automatic machine.
(B) Wood
1, Product: tape cassette, video cassette.
2, classification: straight V, horizontal V, separator, V-cut.
(1) Straight V:
a. Automatic spray.
b. Homemade funnel-type melting furnace.
c. Simple machines.
d. Material: plywood, composite boards, fiberboard.
2. Application:
Third, the packaging industry
Category: Food and paper
(A) Food:
1 carton: water-based ink, printed cartons.
2, Tray: min PVB, PVA precautions need good heat resistance.
3. Tetra Pak straw (PE, PP).
4, PET bottles PE bottom of the cup then.
5, the wax tray: frozen vegetables for export with, need good cold.
6, sports shoe: UV, PVC glazing.
7, deck chairs, parasols carton: the case of re-packaging.
(B) paper:
1, the curtain carton: water-based ink, oil ink.
(C) Quality of cause and effect then should Precautions
1, the quality of the carton printing ink (and compatibility related) and coating tray above plastic material (such as: PVC, UV, PVA, PVB) and then directly affect the thickness of the material.
2 Other notes:
(1) hot-melt adhesives curing duration, pressing length of time, the operating temperature level.
(2) the selection of hot melt material and pressing need because of the length of time
Fourth, the system of the present: copper, cable, wireless
(A) Classification: The system is divided into two categories
(B) the advantages and disadvantages:
(1) Corded:
Good quality and durable disadvantage - - Advantages consuming
(2) Wireless:
Benefits - aging fast
Wireless-based export industry, due to a larger number, and claims a right angle back better, but can not achieve this quality manual.
Fifth, the plywood industry
(A) Definition: plywood namely plywood, plate.
(B) plywood manufacturing process
1, the first original not dig into a film, feeding the baking chamber drying.
2, after the drying timber and sent to the machine side, ready to engage (with HM engagement) was closed after pressing plywood, plastic processing to the urea at the top and bottom of each post-processing coating a bonding, laminating.
Six pressure-sensitive
(A) diapers with hot melt adhesive
1, the diaper of the manufacturing process
l, diapers of the manufacturing process
Wherein the pulp is the main absorption material, wood pulp tissue undertaking the installation, the non-woven breathable permeable surface of the coating material, PE film is impermeable substrate, the elastic band is tight and leak-proof function. Due to the improvement of manufacturing technology, each manufacturer of the material just to make
Materials and machinery also have different forms, but also increasingly fast production speed can reach 300 to 500 / min. Due to the use of different machines, operating machines and coating methods are also different with it.
The coating can be divided into:
(1) Coating (coating type)
(2) Nozzie (nozzle type)
(3) Spray (spray)
When the machine started operating Line Speed will often change, then followed by the coating amount of the agent and coating methods have made the appropriate adjustments with the speed of the host of the cloth in order to maintain a certain amount of glue, for operating the machine must be installed There are devices like gear pump. And
Line and as usual there are more than two of the manipulator, adhesives species ash likewise, to apply to the use of di
(Ii) the use of hot melt adhesive should Precautions:
1, ambient temperature
Ambient temperature changes in winter, summer, or even a day, morning and evening, the ambient temperature changes should note that open time of adjustment, where possible, the range of the best mining workplace air-conditioning equipment, in order to reduce this factor. There are changes in the ambient temperature, the temperature of the coating
And adjusting the amount of coating should be followed in order to maintain both the adhesion.
2. Check the machine and maintenance
Diapers with plastic than other uses of the use of large, it requires precision coating of shoes is quite high, it must be cleaned regularly nozzle coating die (Coating head), clean and replace the filter of the set target temperature adjusting, if possible guarantee
The higher the frequency, the better support.
3, the physical properties of hot melt adhesive of claim
(1) followed by the weather: the use of diapers of direct skin contact with the baby, and the baby body temperature is between 36 to 40, diapers average time 4,8 hours, so that the heat resistance is important, but then can not therefore bad (elastic band bleeder occur off-line) or hot
Melt exudation.
(2) Water resistance: the use of diapers to absorb urine with the rules then it should be noted that the water resistance agent.
(3) thermal stability: manufacturing melting tank used by the general diapers are great, when mechanical problems occur ring true or hot melt adhesive must be a period of time at a high temperature, then changes can not occur at this time, the viscosity change and carbonization, and then in order to avoid poor quality, change the amount of glue, and Nozzel and filter clogging.
Others, in the selection of hot melt adhesives, also taking into account the stability of the quality of cooked melt, select an appropriate hot melt adhesive has the following advantages:
(1) increase production rate. (2) mechanical operation rate increase. (3) reduction of defective products. (4) reduce the cost of the product.
Since under diaper manufacturers to compete with new products continue to push performance, the relative, the requirements for hot melt adhesive, but also an increasing number of changes.
1, less then face pressure sensitive hot melt adhesive provides good adhesion, but must meet the machine to use.
Seven, toys, jewelry, handicrafts, miscellaneous
(A) Type:
1. Toys: dolls, toy cars, electronic gun. According to material: cloth × cloth, cloth × plastic, plastic × plastics, parts fixed.
2, jewelry: hair ornaments, brooch, decorated with assorted plastic. Bonding material: cloth × ribbons, plastic × plastic, cloth × plating hairpin, plastic × cloth.
3, miscellaneous handicrafts: a crystal ball, pony portrait, flower bottle, ceramic dolls, ceramic frame. Bonding material: wood × glass, Boli × wood, styrofoam × plastics, ceramics × × plastic cloth, ceramic frames × paper.
(Ii) the use of methods and precautions.
Rod-like glue gun and glue used in conjunction, pay attention to the extrusion and temperature control of the glue gun, in case of extrusion ring true, please stop using make glue gun to warm before use.
Granulated rubber must meet the machine, pay attention temperatures.
Eight, DIY (DIY): bonding, repair, Joints
With the rise in Europe and America (DIY) market, the hot melt adhesive also with hand tools and wood furniture, has become one of substance (DIY) market, the essential. NOTES:
1, lightweight and convenient to use card package with the glue gun.
2, how to use the appropriate glue gun is most important.
3, also with the use of smooth pressing time and temperature.
In today's growing environmental noise, with non-toxic, safe and high degree of heat and then melt glue and other advantages, to resolve the current problem does not apply on transport packaging strapping tape, hot melt adhesive believe in technology continue to improve, After resolving viscosity and scope of the anxiety, the future will be more demand for hot melt adhesive upgrade.