The most familiar and commonly used one is " plaster line ", which has become the choice of most people due to its advantages of low price, simple construction and various shapes.
But in recent years, PU lines have gradually become well-known. Compared with plaster lines,its strong toughness and anti-collision characteristics also occupy a place in everyone's hearts.
Picture source: Internet
So today I would like to talk to you about this "pu line" that can push the plaster line off the altar:
·What is the PU line?
·What are the advantages & disadvantages compared with plaster line?
·How to use lines to make it more advanced?
·Buy or not? How to buy?
· Anti-cracking and repair
Don’t know PU? You must have it at home!
If you talk about PU lines, you may not be familiar with it, but when it comes to materials like PU ( polyurethane ), you must be familiar with it.
The sharkskin swimsuit that helped famous swimmer Phelps dominate the swimming pool is made of polyurethane material.
Picture source: Internet
Including the yoga mats used for daily fitness, the sportswear worn by everyone, including football, basketball, plastic track, etc., also contain polyurethane.
PU can be seen in the casing of air conditioners, the interior of refrigerators, car steering wheels, etc.
Although polyurethane is known as the "fifth largest plastic", it is very environmentally friendly and has low loss . It is often used to replace rubber, plastic, nylon, etc.
Therefore, it is widely used in various fields such as medical care, decoration, construction, clothing, and even aerospace, national defense, automobiles, etc.
This is because PU (polyurethane) is an organic polymer material, a synthetic resin product made through the foaming principle, so it is often called PU foam material.
(Yes, everyone will use styrofoam when decorating, and it has something to do with it!)
It can have various forms and is widely used. It has high tensile strength , strong corrosion resistance, and can effectively reduce noise and vibration and other high-quality properties.
Source: Internet
And by simply modifying the formula, you can obtain different physical properties such as density, elasticity, and rigidity.
The difference in hardness between plastic runways and basketball courts
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Source: Internet
Like the well-known PU leather ( artificial leather ), it can not only have an appearance similar to real leather, but can also be made into different colors, has stronger toughness, and is easy to clean and care for.
Picture source: Internet
Low loss & anti-collision, PU wire is more suitable for online shopping
Once you understand the advantages of PU material, you will feel that it is simply born for the decoration industry, such as the PU lines that will be discussed soon.
Picture source: Internet
It is a line made of PU synthetic raw materials, which is shaped by abrasive tools and forms a hard skin, which perfectly inherits the excellent characteristics of PU materials, such as good toughness and vibration resistance.
PU line mold
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Source: Internet
Everyone knows that gypsum line has a fatal weakness, that is, it is not anti-collision and is easily damaged by impact during transportation.
Many friends reported that there are few plaster threads sold in the local market and the styles are poor, so most friends will still choose to shop online.
From this point of view, PU lines are simply the perfect choice for online shopping. Not only are they much lighter than gypsum lines, but they also have strong toughness to back them up. They will hardly be damaged during transportation, and even if there are bumps later, they will not be as pitted as gypsum lines.
The cross section feels like a hard sponge
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Picture source: Zhu Faner's homemade
This is also the main reason why Lion Family chose PU lines.
In addition, the surface of PU lines is smoother and more delicate than plaster lines, and the pattern is clearer. If you are pursuing exquisiteness and texture, then I strongly recommend you to try PU lines.
More three-dimensional and exquisite PU lines
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Source: Xiaohongshu Blogger @ Chengdu Professional Gypsum Line Pu Wire Installation
"Thinness" is the core advantage of PU wire
0% of friends who install French style rollovers have the same feeling: With the same elements and materials, why do others pretend that the French style is textured and high-end, but my home is so boring?
In fact, if you look closely, it is not difficult to find that the width and thickness of lines play a decisive role in the presentation effect.
The focus of French-style lines is "integration". Even the exquisiteness of the depiction should make people feel natural. It is by no means abrupt and steals the show, so it is highly recommended that you choose simple and thin lines.
thin line va thick line
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Source: Internet
In addition to the sense of refinement, thin lines can also visually stretch the floor height . This is actually the same principle as "thin people appear taller" . The tall floor height is a huge bonus for French style.
However, most of the well-known plaster lines are only 4.5cm wide, and few merchants sell very thin ones. Moreover, the toughness of the plaster lines is poor, and the thinner the lines, the higher the loss.
And PU lines can meet any thickness, even up to 1cm.
Different thickness combinations can also make the wall look more layered, but using thicker lines directly will be more blunt and look abrupt and clumsy.
Picture source: Internet
Thin lines can also be used to wrap around the arch, or stick a circle under the top corner line to enrich the layers and add a sense of sophistication.
In our real-life cases, many people use PU wire. The most impressive thing is that a homeowner used European-style black PU wire and combined it with different styles of lines to form a towering retro door head.
Picture source: Zhufaner-Real People
Should I buy PU lines & how to buy them?
has said so many advantages of PU lines, does it not have any shortcomings?
Of course, 's shortcomings can actually be applied to most "new materials".
The price is 2 to 3 times that of plaster thread.
For example, the tiger head thread commonly used in French style is about the same width. The pu thread costs 42 yuan for 2.4m, while the gypsum thread costs 15 yuan for 2.4m.
ps: Whether it is pu wire or gypsum wire, it is sold at 2.4m/piece. The PU lines selected by
are still the most common ones. They did not choose other styles, and the width is slightly smaller than the plaster lines.
There are few masters who can install
PU wire is not popular enough now. Most of the masters only have experience in installing gypsum wire.
Before, a friend said that he called nearly ten masters on 58. They all said that they only know how to install gypsum wires. The masters who can install can easily raise the price. The final price is about 30 yuan per meter.
The installation cost is high
Although some stores say that installation is included, everyone still misses the painting step. The surface of
pu material is smooth and needs to be sprayed by machine.
A friend with experience shared that the cost of repainting at his home is 5 yuan per meter. Including the cost of manual installation, the installation fee is twice as much as buying PU lines. If you buy gypsum lines, the installation fee is about 8 yuan per meter.
spray paint machine
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Picture source: Internet
If you can’t find a local master with installation experience, plaster line is more worry-free and saves money. If you find it troublesome, you can go directly to the local building materials market to buy it.
If you have a limited budget and want to use PU lines, then I recommend a combination of PU lines for the walls and plaster lines for the top corners. This saves money without affecting the effect too much.
Picture source: Zhu Faner - Real People
If you decide to buy PU lines, in addition to the smooth and delicate surface, you should also pay attention to the following three points to avoid pitfalls:
Substandard (PS) and good (PU)
Because most of my friends are renovating for the first time and don’t know what the PU lines are, so some merchants use PS lines as PU lines to sell.
ps is much cheaper than PU, and does not have the anti-collision and strong toughness of PU. It is mostly used to make stationery, cups, food containers, etc. Fast food boxes in daily life are basically made of PS foam sheets for the second molding.
After getting the product, you can use your fingers to scratch the surface . If you can easily scratch the mark, there is a high probability that it has been cheated by the merchant.
"Density" distinguishes advantages and disadvantages
Although PU lines have so many advantages, cannot stand up to inferior production levels. The final effect is closely related to equipment, raw materials, etc.
Be sure to check the density on the back when you buy it. There will be a lot of holes and holes behind low-quality PU lines, which means that the density is not enough and it is difficult to take advantage of the PU lines.
High quality vs poor quality
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Picture source: Xiaohongshu blogger @成都professional plaster line pu line installation
The more three-dimensional, the higher the quality
If you want clear lines or exquisite carvings, it depends on the degree of three-dimensionality.If it is too flat, it will seem to lack some layering, which is no different from traditional plaster lines.
Picture source: Xiaohongshu blogger @ Chengdu professional gypsum line pu line installation
Picture source: Xiaohongshu blogger @ Chengdu professional gypsum line pu line installation
So it is recommended that you buy more samples and come back to see the real thing before making a decision.
Anti-cracking & Remedy
Finally, one thing I need to tell you is that PU lines are not 100% free from cracking. Both the installation details and the natural settlement of the building in the later period will have an impact on the PU lines.
The installation timing must be accurate. The most economical and perfect way to install PU lines is before scraping the first putty and before polishing. Use glue at this time to prevent it from falling off; because the putty is too smooth after polishing, it will fall off after sticking.
Picture source: Xiaohongshu blogger @Ellena_Meng
If it has been polished, just after applying the primer and before applying the topcoat. If
needs to be installed on the finished surface, after is glued, it is best to use straight nails to reinforce on both sides to prevent it from falling off due to insufficient bonding.
Pay attention to thermal expansion and cold contraction
If the PU line density is not enough, it will produce the effect of thermal expansion and contraction. If it is slight, obvious cracks will be seen at the seams of the line boards, and if it is serious, it may even lead to breakage.
Of course, failure to deal with the joints will also lead to cracking.
Picture source: Xiaohongshu blogger @Ellena_Meng
In addition to selecting high-quality PU lines, try to avoid installation in places where the temperature difference is too large, such as walls exposed to sunlight.
There are also some in the northern region, especially the northeast, where thermal expansion and contraction are more serious, and the lines will become shorter and crack.
Repair method
If there is a serious break, it needs to be dismantled again for construction. If the crack is not serious, you can use the following method:
① First clean up the dust and debris in the gap . You can use a utility knife to operate it and grind out a new profile.
② Apply anti-cracking glue or nail-free glue in the gap, ensure that the innermost part of the gap is in place.
③ After the glue dries, fill the gaps with edge closing glue and polish them . If painting is needed, spray paint again.
Picture source: Internet
In summary, PU lines are the same as gypsum lines. is a material with obvious advantages and disadvantages. . I believe everyone will have an idea after reading this article. Welcome to leave a message in the comment area to exchange and discuss!
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