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Recently the national temperature plummeted, paint reinforcers remind everyone to pay attention to clothing to keep warm. At the same time, pay attention to adjust the paint ratio according to the climate to avoid unnecessary problems.Oily paint winter construction precautions:timely adjustment of paint thinner, curing agent use ratio At this time, if the use of summer thinner dosage, it is very easy to cause drying speed is too slow, bite bottom and other phenomena.do a good job of dust removal at the construction site cold air coming, will generally bring wind cooling weather, especially in the north. At this time, the dust in the air will be many times more than usual, will lead to paint spraying after the plate surface effect is not good, particles increase, feel worse. For small furniture factories without dust-free spray rooms, special attention should be paid to wind and dust removal work at the paint construction site to minimize the production of particles.attention to control the temperature of the construction site and the temperature of the drying room wood paint in low temperature drying performance will be significantly reduced, in order to ensure the construction effect, the paint construction site temperature should not be lower than
5
degrees C. In particular, the board room should pay more attention to keep warm, at least to ensure that
15
degrees C or more, to ensure that the paint is fully dry.Paint can not be too thick once construction after the temperature drops, paint should not be thick coated, otherwise there will be too slow drying, sanding sticky sandpaper, biting the bottom and other phenomena, generally can be used thin coating methods for construction. When the paint is drying slowly and the hardness is low, the waiting time can be extended appropriately before packaging. If the rush time is required, the temperature of the drying room can be raised appropriately to speed up the drying speed.。 PU
bright light products can be replaced with fast-drying curing agent to improve drying performance, but
PU
matte products must not be unauthorized use of fast-drying curing agent, otherwise it will bring gloss instability, paint film whitening and other problems.。 PE
series of products can not blindly increase the amount of blue, white water after the temperature drop,
PE
paint also has a slow drying speed, sanding sticky sandpaper situation, encountering this situation should generally be resolved by raising the temperature of the drying room, the temperature of the drying room should be maintained at least
15
degrees C or more. When the temperature is low, the method of increasing the amount of blue and white water can solve the problem of slow drying of
PE
paint to a certain extent, but the amount of blue and white water should be controlled within a certain range. Because when the addition of blue and white water exceeds a limit, the improvement in the dryness of
PE
paint will not work. Instead, it may cause lacquer film cracking, de-layering and so on due to excessive addition of blue and white water. Therefore, it is not desirable to blindly increase the amount of blue
white water
the dryness of the paint at low temperature.At the same time in the low temperature environment, paint construction is also prone to the following problems:
1, slow drying
phenomenon: mainly reflected in the primer grinding time extension and polishing, paint packaging time is extended.
prevention method:
in the construction of
PE
primer appropriately increase the amount of blue water, white water (do not exceed), and use winter thinner;
In the construction of
PU
primer appropriately increase the amount of curing agent (do not exceed), and use winter thinners;
primer construction, especially
PU
primer try not to overcool at once;
to dry room using heating equipment, and appropriate air to increase air circulation;
appropriate addition of suitable amount of catalytic drying agent and fast dry solvent;
2, bite the bottom
phenomenon: the second primer or paint under the paint solubility, resulting in rule cracks;
prevention method:
primer construction as far as possible not to over-coat once, until the lower paint is completely dry after the construction of the paint
wet and wet construction as far as possible to lengthen the interval;
to dry room using warm equipment to warm;
thred, whitening
phenomenon: paint construction when the surface white or after the construction of a period of time to place the phenomenon of under the paint, especially stickers and paste wood furniture prone to this phenomenon;
Prevention method:
stickers and stickers after the wood skin to wait for the plate moisture to be completely dry before painting construction;
primer should not be too thick at once;
substrate construction attention and paint temperature difference can not be too large, as far as possible the substrate to be moved into the spray room first;
humidity exceeds
80%
when it is recommended to spray room and board room humidification;
4, back-stick
phenomenon: paint is not dry, or low temperature weather paint slow dry, resulting in packaging furniture surface paint and pearl cotton glued together
The use of fast-drying curing agents for winter and
appropriate increase in curing agent dosage;
5, back thickening
phenomenon: paint surface uneven particles, both dumb powder out of the state, look at as wrinkled, orange peel;
prevention methods:
paint spray should not be too thick coating;
use winter thinner to adjust the paint table dry time;
spray room and board room appropriate increase temperature;
to maintain the air circulation of the dry room, release solvent gas easy to dissipate;
6, hanging
phenomenon: paint drip phenomenon;
prevention method:
using the paint manufacturer designated matching thinner;
coating film in the feeling of slightly thin, not one Sub-thick coating;
spraying pay attention to the uniform gun, paint film thickness consistent, especially when facade spraying must master the paint film construction thickness;
paint construction viscosity according to the paint manufacturer specified viscosity dilution coating
Try to make the coating and paint temperature gap is not significant under the condition of coating;
water-based paint winter construction precautions: 1, water-based wood paint dilution In normal times, water-based paint storage and use will not have too many problems, winter temperature is low, water-based paint can no longer directly with tap water, because the water temperature is very low, will affect the drying speed of water-based paint, and even cause dry phenomenon. Winter water-like paint can be diluted in two ways:
1
,
40
50
degrees of warm water dilution. Diluted with warm water, the evaporation of water is faster, which can improve the drying speed of water-like paint. At the same time diluted with warm water, you can also use warm water to keep warm water-like paint - that is, the adjusted water-like paint in the warm water basin to keep warm, especially color paint with this method as a good.
2
, diluted with a mixture of alcohol and warm water. The ratio of alcohol to water is recommended at
1
:
1
, which works well in primers. But the last time the paint, do not take this method, will affect the leveling, resulting in a bad feel or orange peel phenomenon occurs.II, construction environment requirements humidity is the key factor affected by water-like paint construction, humidity is too low, dry too fast, affecting leveling, high
humidity, dry slow, easy to
whiten;, low-temperature construction precautions water-resistant paint can not be a one-time thick coating, to scrape many times, otherwise it is easy to crack phenomenon. When the temperature is low and the construction of colored transparent paint, there will be uneven color distribution.construction must first fine-tune the alcohol and color, and then add varnish and then add
40
degrees of warm water after the commissioning of the construction
,
this operation will make the color fine dispersion more uniform.
。