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Flat stickers common substrates

Material	category	type	Features
Substrate	Wooden	Solid wood panels, artificial boards and plain boards	Porous, easy to stick, easy to fall off
	Wooden		The surface quality is unstable and requires surface treatment
	Metal	Aluminum plate, galvanized plate, aluminum plastic plate	Oil removal must be thorough
	Metal	Aluminum honeycomb board	Pressure difference
	Inorganic	Calcium silicate board, magnesium glass plate	UV base is usually required
	plastic	Foamed wood plastic WPC, PVC foam board	Low surface energy, surface treatment is required
		SPC without foaming stone	Low surface energy, surface treatment is required
		PP board	Low surface energy, surface treatment is required
epidermis	plastic	High gloss films such as PVC, PET, acrylic and other	Almost all are back-painted
		Thin PVC film	Most of them have no back coating, and some have low surface energy
		Embossed film	Low surface energy and low effective contact area
		Transparent PET	Transparent visible glue layer
	Paper	CPL, HPL	HPL needs to be sanded in place
	Paper	Back-mounted triamine paper or inferior HPL	Uneven rebound force
	Wood leather	Wood leather	Porous, easy to stick, strong rebound
	Metal	Aluminum foil, aluminum veneer, galvanized plate	Oil removal must be thorough

Technical requirements for flat sticking PUR

Hardness requires that

the surface should not have particles, bubbles, depressions, rebounds, orange peels, etc. have
high strength, good water resistance and durability, and temperature and humidity changes must not be degreased. Thermal stability of
the wood veneer should not be degreased, glue-free, and over UV-free foaming
adhesive films have good hardness

Operational requirements

and thermal stability. Otherwise, the wire drawing will affect production, especially the gluing
odor of thin plates will greatly affect the comfort of workers
, the viscosity will greatly affect the high amount of glue, which will directly affect the cost of
the glue rollers. The glue rollers can be easily cleaned
and operated at low temperatures and health.

Factors affecting the amount of glue applied to the roller

Regular measurements are required, with attention to position and feed speed

The required size of glue coating depends on the surface roughness of the material and the final product requirements. The glue amount is too large, which will waste and affect the surface effect;

The amount of glue is too small, which affects the bonding strength and causes defective products.

Generally, flat patches are required to be between 30 and 120gsm. There are the following influencing factors in actual production that need special attention:

Glue between rubber scraper and rubber coating roller (dynamic)
silicone roller hardness rubber scraper roller rotation
speed feed speed
glue viscosity and use temperature

Key points of PUR flat sticking process

Melt adhesive system requirements

Temperature setting value of glue barrel, hose, glue gun: 130±10℃ (+10℃ in winter, - 10℃ in summer)
Recommended: 120℃-PUR solution temperature (mold temperature machine 160℃, or the thermal oil-controlled rubber roller setting value is 160℃

The higher the melt glue temperature, the lower the viscosity, and the glue ages faster;

The lower the melt glue temperature, the lower the viscosity, and the glue is coated with wire drawing;

Glue coating amount: Recommended above 45g/㎡, absolute surface roughness of the substrate

Preprocessing system requirements

The dust removal and drying channel are opened, and the temperature remains above 35℃ after passing through the drying channel (winter)

Glue coating system

After applying glue, it should be fit as soon as possible and do not leave it cold for too long.

Adjust to the speed ratio of the metering roller and the coating roller according to the coating quantity and the melting temperature

Adjustment method of glue amount

The metering roller is close to the glue coating roller, and it can be tighter when there is glue between the rubber rollers.

Adjust the parameters of the metering roller. The larger the tree value, the larger the glue amount.

Adjust the parameters of the lower rubber roller. The smaller the tree value, the slower the speed, and the larger the glue amount. Generally, the same rate as the rubber roller

Fitting system

The temperature of the front panel must reach above 35℃ in winter and below 40℃ in summer
Rubber roller pressing setting in front part (surface material + substrate thickness) -0.8-1.2mm

The rear part of the steel roller pressing setting (surface material + substrate thickness) -0.8-1.2mm

Finished stage

Collect finished products in a timely manner, stack and insulation and moisturizing measures (cooling is required in summer, and if the plane effect is high, place soft cushions between the boards. At the same time, pay attention to the temperature of the middle plates in the stacking, and heat and humidification in winter)

PUR

PVC/PET/ABS/Paper/Leather-PVC board/Foaming board/ Melamine board/Multi-layer/Solid wood/Shaped/Aluminum board	Appearance: Creamy white	Viscosity: 5500cps (140℃)	Use temperature: 125 ~ 145℃
PVC/PET/ABS/Paper/Leather-PVC board/Foaming board/ Melamine board/Multi-layer/Solid wood/Shaped/Aluminum board	Appearance: Creamy white	Viscosity: 5500cps (140℃)	Use temperature: 125 ~ 145℃
PVC/PET/ABS/Paper/Leather-PVC board/Foaming board/ Melamine board/Multi-layer/Solid wood/Shaped/Aluminum board	Appearance: Creamy white	Viscosity: 5500cps (140℃)	Use temperature: 125 ~ 145℃
Honeycomb board/fiber board/paper/multi-layer/inorganic board	Appearance: Yellow	Viscosity: 15000 (160℃)	Use temperature: 155 ~ 175 °C
Honeycomb board/fiber board/paper/multi-layer/inorganic board	Appearance: Yellow	Viscosity: 10000cps (160℃)	Use temperature: 155 ~ 175 °C
High gloss film/transparent film-PVC board/foam board/ melamine board/multi-layer/solid wood/shaved/aluminum board	Appearance: colorless and transparent	Viscosity: 7500cps (130℃)	Use temperature: 110 ~ 130 °C
Honeycomb board/fiberboard/paper/multi-layer/inorganic board-metal	Appearance: Yellow	Viscosity: 15000cps (160℃)	Use temperature: 155 ~ 175 °C
PVC/PET/ABS/Paper/Leather-PVC board/Foaming board/ Melamine board/Multi-layer/Solid wood/Shaped/Aluminum board/Carbon green board/Co-extruded board	Appearance: light yellow	Viscosity: 7500cps (140℃)	Use temperature: 125 ~ 145 °C

Flat stickers common substrates

Technical requirements for flat sticking PUR

Factors affecting the amount of glue applied to the roller

Key points of PUR flat sticking process

PUR

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