The plastic color matching is based on the three basic colors of red, yellow and blue, and is matched with the color that is pleasing to the eye, conforms to the color difference of the color card, economical, and does not change color during processing and use.
In addition, plastic coloring can also impart various functions to plastics: improve the light resistance and weather resistance of plastics; impart special functions to plastics, such as electrical conductivity and antistatic property; different colored agricultural mulch films can be used for weeding or pest control, and breeding.
Colorant type
Organic colorants are further classified into organic pigments and solvent dyes.
Organic pigments:
Strong coloring power, complete chromatogram, small relative density, bright color, good light resistance, and small addition. However, its heat resistance, weather resistance and hiding power are inferior to those of inorganic pigments, the dispersion effect is slightly poor, the transparency is poor relative to dyes, and the price is high. In the processing, it is necessary to uniformly disperse the pigment in the plastic by mechanical heating and kneading. It is mainly used for: crystalline materials such as POM, PE, PP, TPU, TPE and partially bright (bright color products that cannot be achieved by dye scent). ) in the product.
Solvent dye:
Unlike pigments, it is soluble in water or oil and is generally oil-soluble and transparent. The color is bright and bright, and is usually applied to transparent plastics such as PS, PC, and polyester. However, it is poor in light resistance, heat resistance and migration resistance. Dyes also include special pigments such as metallic pigments, silver powders, gold powders, and pearlescent pigments such as fluorescent whitening agents, fluorescent pigments, interference pigments, temperature-changing pigments, and the like.
Inorganic colorants are classified into inorganic pigments and inorganic dyes.
Inorganic pigments:
Generally, it has good thermal stability, weather resistance, light resistance, low price and superior dispersion performance. For example: titanium dioxide, carbon black, and the like. However, the coloring agent has a relatively low coloring power, a relatively high density, a large amount of addition, and a non-bright color. Mainly used to increase the color concentration, such as: PA, PC, PBT, POM, PPO, PPS and other materials and non-transparent color, gray and other resins.
Inorganic dyes:
Mostly used in paints.
Colorant characteristics comparison
Basic concept of color matching
Plastic colorants are classified into four types according to their physical form:
Powdered coloring agent - toner;
Paste coloring agent - color paste;
Liquid coloring agent - color oil;
Solid coloring agent - color masterbatch;
Among them, powdered colorants and solid colorants are widely used.
Toner coloring features:
Good dispersion, low cost, and small batch operation. It eliminates the consumption of human and material resources in the processing of color masterbatch and color paste, and the cost is low. Compared with other granulation and coloring, the processed resin undergoes less degradation process, which is beneficial to reduce the aging of plastic products and increase their service life.
Disadvantages:
Pigments will fly during transportation, storage, weighing, and mixing, causing pollution and seriously affecting the working environment.
Some pigment powders with poor heat resistance and fear of shearing are made into color masterbatch. Due to the long time of high temperature, the shearing effect in the masterbatch processing equipment is long, and the coloring effect is obviously weakened, such as pearl powder and fluorescence. Powder, luminous powder, and injection molding products are also prone to streamlined scars and seams.
The hopper of the extruder is not easy to clean. The toner used for coloring adheres to the inner wall of the cylinder (or even the screw) under the action of a humectant such as white oil. When refueling is required, cleaning the cartridge becomes a problem for the field operator.
Coloring with toner, since the pigment powder is evenly distributed in the resin to be colored, its dispersibility is good. This conclusion can only be applied to injection molding products, especially thick-walled products, and for blown film and spinning products. When it comes to it. Because the toner is generally not pretreated, when it is mixed with the resin, the pigment powder should be made only from the inlet of the extruder, the screw, the discharge port, and the short plasticization mixing time. The molecules and the pigmented molecules are well-joined – full combination is completely unguaranteed and there is a “sandwich†phenomenon. However, this "sandwich" phenomenon will be masked in thick-walled products, which is obvious in blown film and spinning products. Therefore, the latter method of coloring is still dominated by color masterbatch.
Color master coloring features:
Using a certain process and corresponding equipment, the pigment (or dye) is mixed into the carrier under the action of the auxiliary agent, and the molecules of the pigment powder are fully combined with the molecules of the carrier resin by heating, plasticizing, stirring and shearing. It is then made into particles of similar size to the resin particles. When used, it is only necessary to add a small proportion (1% to 4%) to the resin to be colored to achieve the purpose of coloring the resin. The advantages are as follows:
The environmental pollution problem caused by the flying of the toner is improved, and the color change is easy during use, and it is not necessary to perform special cleaning on the extruder hopper, which is convenient.
Targeted and matched color. Compared with the batch of resin dry dyeing granulation and then to the plastic parts, the use of color masterbatch can reduce the resin aging caused by the secondary processing of plastic products, which is beneficial to the improvement of the service life of plastic products.
During the processing, the pigment masterbatch is fully mixed with the carrier resin under the action of the auxiliary agent. In use, it is placed in a certain proportion of the resin to be processed, and the color master quickly enters the role to recognize the resin. Compatibility is significantly better than toner coloring.
Disadvantages:
Due to the small amount of addition, the processing time of plastic products is short, which is limited by the length-to-diameter ratio of the screw of the extruder, and the dispersibility of the color masterbatch is often inferior to that of the toner. An additional manufacturing process, the cost of dyeing is higher than toner coloring. When the carrier in the masterbatch differs from the properties of the resin to be colored, undispersed dots, stains, and patterns often appear on the surface of the plastic article. Therefore, the use of the masterbatch is limited due to compatibility and dispersibility.
Color master selection
Dedicated color masterbatch:
When the masterbatch is produced, the same resin as the resin to be colored is used as a carrier, and a high concentration of pigment (dye) is added. Under the action of the auxiliary agent, heating, plasticizing, kneading and extruding are carried out. The granules are made into a coloring agent specially suitable for such a resin, and are called a special color masterbatch. The concentration of the special color masterbatch can be high or low, and the general addition amount is between 1% and 4%.
Universal color masterbatch:
Also known as "universal color masterbatch", although a resin is also used as a carrier, it can be applied to the coloration of other resins than its carrier resin. Firstly, the resin with low melting point and high melting index is selected as the carrier of the universal color masterbatch. The pigment powder ratio in the masterbatch is as high as possible, so the universal color masterbatch must be a high concentration masterbatch, and the amount used in the injection molded product is generally 1 %. In order to improve the affinity of the general color masterbatch, a special coupling agent is usually added, and the mixing time is prolonged.
Color master selection principle:
In order to produce a universal color masterbatch, it is necessary to use a pigment with a high heat resistance grade and a wide application range. When the temperature grade of the pigment powder reaches a certain level, the cost of the pigment increases by 50% to 100 for every 10 °C to 20 °C. %. When a general-purpose color masterbatch made of a high-temperature-resistant pigment is used for coloring a high-melting-point resin, it is used as a low-melting tree finger such as LDPE, but the surplus value is increased.
From the coloring effect analysis: because different resins in the coloring process, the degree of "eat color" is different. It is difficult to achieve the intended effect with a universal color masterbatch. Conversely, the wide applicability of the universal color masterbatch, although its carrier resin is incompatible with the colored resin, can be ignored, but does not mean that it does not exist at all.
Due to the small addition ratio of the universal color masterbatch, the dispersibility is relatively poor, and the surface of the plastic product is prone to patterns, stains, and color spots, and the phenomenon of crispy skin is caused by the mismatch of the material species, especially for large areas and thin walls. Plastic parts with complicated shapes should pay more attention. At this time, special color masterbatch should be used as much as possible, and the color concentrate with low concentration should be selected to increase the added amount to improve the dispersibility (selectable color of 1:20, 1:10) mother).
10W Mini Glue Gun Ptc Heating Features:
1. Versatile
2. Easy
3. Quick
4. Proective Nozzle Cover
5. Trigger Flow Control
6. Bonds instantly
7. High quality
8. High temperature or low temperature
Idea for many applications. Fastening various materials such as paper, cardboard, fabric,wood, lace,trims,leather,metal,glass, tiles, rubber, ceramics and flooring etc. Ideal for hobby and household repair,DIY&craft projects.
Designed and manufactured to the highest of
standards to ensure a robust and long life, we hope it provides you with many
years of trouble-free, safe and reliable service.
General Safety Information:
1. Check
if the plug cord was in good condition, and if there is stand before plug into
the electrical outlet ; Check if the used glue gun has glue flow through back
of the tunnel;
2. wait
5-10 minutes to allow glue to soften, stand up the glue gun on the table when
not in use;
3. Touch
nozzle to any clean, dry surface you wish to bond, to avoid any impurity stop
the nozzle;
4. If the glue could not flow from the nozzle when
the glue gun start to work, check if the glue gun are heating;
If glue
gun can not be heated, there are following reasons:
1
Plug cord into electrical outlet not
properly;
2
Glue gun has been destroyed owing to
inner cord short circuit;
If glue
gun can be heated, there are following reasons: Nozzle has been stopped by any
impurity, ask careerman to manage it.
5. Do not use the glue gun
under moist climate, humidity will affect insulation and cause electric shock;
6. Do not touch the nozzle
or melted glue;
7. Do not remove out the melted glue stick from
the tunnel back side, it will damaged the glue gun as well as scalding person
hands.
8. Do not to disassemble or assemble any glue
gun accessories freely, it will cause glue gun do not work properly;
9. Keep out of reach of children and stocked it
beyond any of Children palpable side;
10. Only used for melting glue stick, no other
usage;
11. When in use, there are any glue flow back
from tunnel, stop using immediately, wait for careerman clean the glue;
12. Close the power if the glue gun not in use
after 15 minutes;
Important
Caution:
1．
Before use the glue gun, check
if the plug cord into electrical
outlet properly;
2． When glue gun
in first use, the heating element will have small smoke, it is normal
situation, but the smoke will disappeared after 10 minutes;
3． After power,
not for a long time in standby mode(not longer for 20 minutes), when the
suspension of use, unplug first.
4． Avoid to use
the glue gun under very hot or very cold environments.
5． Better not
work under direct cold wind blowing, it will reduce efficiency and loss power
6． When in
continuous using, do not press the trigger with great pressure, and try to
squeeze out the un-melted glue, it would damage the glue gun
7． Not
applicable for bonding heavy objects or objects needed strong adhesive
8． The quality
of glue stick will directly influence the glue gun function and sticking
objects quality;
9． If the
power cord is damaged, do not replace it by yourself, must ask for
professionals to replace it.
10． This tools must b e placed in its position when
not in use. And storage before the tools complete cooled.
11． Be careful when using any other electrical appliance
with flammable material.
12． Not applicable for a long time in the same
place.
13． Do not use an explosive gas atmospheres.
14． Note that heat may be the line of sigh, combustible
materials.
15． Do not leave equipment unattended when switched
on.
16． This appliance is not intended for use by
persons(including children) with reduced physical, sensory or mental
capabilities, or lack of experience and knowledge, unless they have been given
supervision or instruction concerning use of the appliance by a person
responsible for their safety.
17. Children should be supervised to ensure that
they do not play with the appliance.
Using methods
1. Glue gun
using voltage is 110-220V AC,50/60Hz;
2. Tip gun
forward on stand and place a piece of cardboard under the nozzle
3. Use 7-8mm
(mini trigger glue gun), 11-12(big trigger glue gun), insert glue sticks
through
tunnel at back of gun
4. After power,
wait for 5-10 minutes to allow glue to soften
After glue softens, squeeze
trigger to feed glue through glue barrel. Excessive force will damage glue gun.
Put down nozzle after work, disconnect the power plug
Mini Glue Gun
10W Mini Glue Gun, Mini Glue Gun, Small Glue Gun, Electric Glue Gun
Ningbo Kingvos Electrical Appliance Co.,Ltd , http://www.kingvos.com
