Ten reasons of the wall putty powder off

In the use of putty powder, powder off is a very common and very serious problem, the swelling of the putty layer, cracks will cause cracks in the latex paint finish, putty powder off powder, white is the most common putty construction problems, to understand the root cause, you need to understand the basic raw material composition of putty powder in the curing principle, combined with the drying degree in front of the construction, water absorption rate, For a series of reasons such as temperature, bd chem found the top ten reasons why putty powder falls off, let's take a look at it below.

Reason one

The strength of the bonding material of putty is not enough to cause the system to powdering, and the manufacturer blindly reduces the management cost, the bonding strength of the glue powder is poor, and the addition amount is small, especially the internal wall putty, the size of the bonding strength, the depowder is not depowder and rubber powder, and the quality of the use of rubber powder and the addition amount have a great influence on the relationship.

Reason two

In the putty formula, unreasonable design formula, material selection and structure are very important. Such as hydroxypropyl methyl cellulose (HPMC) as the interior wall is not waterproof putty, although HPMC is very expensive, but the double fly powder, talc powder, wollastonite powder and other fillers do not work, if only the use of HPMC will cause depowder, and low-cost CMC, CMC will not depowder, but CMC, CMS can not do waterproof putty, can not do external wall putty, Because CMC and CMS encounter the reaction of gray calcium powder and white cement, it will cause dedusting, and it will also turn polyacrylamide into gray calcium powder, and white cement as a waterproof coating, which will also cause chemical reactions.

Reason three

Mixing is not uniform, is the main cause of the internal and external wall putty powder, the country and even some enterprises production technology manufacturers product production putty powder equipment can be simple, varied, not a special mixing equipment, mixing is not uniform, cause putty powder.

Reason four

An error in the production process caused the putty to fall off. If the mixer does not have a cleaning function and there is more residue, the cmc in the ordinary putty will react with the gray calcium powder in the waterproof putty, and the cmc, cms in the inner wall putty and the white cement in the external wall putty will react and cause falling off. Some companies set up special equipment cleaning mouth, you can clean the machine residue, not only to ensure the quality of putty, but also a multi-purpose machine, buy a equipment to produce a variety of putty.

Reason five

The difference in the quality of the filler is also easy to develop resulting in dedusting, the use of a large number of internal and external putty can be filled, but heavy calcium powder, talc powder as the content of Ca2CO3 and different, the impact of different pH will also cause the dedusting of the basic putty, such as the interior wall putty powder in Chongqing and Chengdu, China, with the same rubber powder, but talc powder, heavy calcium powder is different. In Chongqing is not removed powder, in Chengdu is removed powder, in Henan, northeast is not removed powder, and in some other areas of our country is removed powder.

Reason six

Weather analysis is also an important reason for the internal and external wall putty powder, such as the internal and external wall putty, dry in some different regions of the north and the climate, good ventilation, putty finish film fast, not powder, and in southern China not, especially for some other areas in the south have Meiyu weather, long-term damp, putty film formation is not good, will also powder, Therefore, we are so students in some countries and regions to adapt to the waterproof putty with gray calcium powder.

Cause seven

Ash calcium powder, white cement and other inorganic metal binders are not pure, mixed with a lot of double fly powder. The so-called multi-functional gray calcium powder and multi-functional white cement on the market are not pure, because a lot of money is needed to use inorganic composite binders that are impure through these ideas, and the putty for internal and external wall waterproof must be depowdered.

Reason eight

In summer, the external wall putty is not enough to retain water, especially in high temperature ventilation places such as high-rise doors and Windows, gray calcium powder, cement initial setting time is not enough, water has been lost, maintenance is not good, and the powder is seriously removed.

Reason nine

Not timely grasp the calendering time, not timely calendering treatment;

Reason ten

The putty powder has passed the shelf life, which will cause the bonding strength to decline. In the use of putty powder, putty powder depowder is a very common and very serious problem, the swelling of the putty layer, cracks will cause cracks in the latex paint finish, putty powder off powder, white is the most common putty construction problems, to understand the root cause, you need to understand the basic raw material composition of putty powder in the curing principle, combined with the drying degree in front of the construction, water absorption rate, For a series of reasons such as temperature, bd chem found the nine major reasons for putty powder to drop powder, let's take a look at it.

Reason one

The strength of the bonding material of putty is not enough to cause the system to depowder, and the manufacturer blindly reduces the management cost, the bonding strength of the glue powder is poor, and the addition amount is small, especially the internal wall putty, the size of the bonding strength, the depowder is not depowder and rubber powder, and the quality of the use of rubber powder and the addition amount have a great influence on the relationship.

Reason two

In the putty formula, unreasonable design formula, material selection and structure are very important. Such as hydroxypropyl methyl cellulose (HPMC) as the interior wall is not waterproof putty, although HPMC is very expensive, but the double fly powder, talc powder, wollastonite powder and other fillers do not work, if only the use of HPMC will cause depowder, and low-cost CMC, CMC will not depowder, but CMC, CMS can not do waterproof putty, can not do external wall putty, Because CMC and CMS encounter the reaction of gray calcium powder and white cement, it will cause dedusting, and it will also turn polyacrylamide into gray calcium powder, and white cement as a waterproof coating, which will also cause chemical reactions.

Reason three

Mixing is not uniform, is the main cause of the internal and external wall putty powder, the country and even some enterprises production technology manufacturers product production putty powder equipment can be simple, varied, not a special mixing equipment, mixing is not uniform, cause putty powder.

Reason four

An error in the production process caused the putty to fall off. If the mixer does not have a cleaning function and there is more residue, the cmc in the ordinary putty will react with the gray calcium powder in the waterproof putty, and the cmc, cms in the inner wall putty and the white cement in the external wall putty will react and cause falling off. Some companies set up special equipment cleaning mouth, you can clean the machine residue, not only to ensure the quality of putty, but also a multi-purpose machine, buy a equipment to produce a variety of putty.

Reason five

The difference in the quality of the filler is also easy to develop resulting in dedusting, the use of a large number of internal and external putty can be filled, but heavy calcium powder, talc powder as the content of Ca2CO3 and different, the impact of different pH will also cause the dedusting of the basic putty, such as the interior wall putty powder in Chongqing and Chengdu, China, with the same rubber powder, but talc powder, heavy calcium powder is different. In Chongqing is not removed powder, in Chengdu is removed powder, in Henan, northeast is not removed powder, and in some other areas of our country is removed powder.

Reason six

Weather analysis is also an important reason for the internal and external wall putty powder, such as the internal and external wall putty, dry in some different regions of the north and the climate, good ventilation, putty finish film fast, not powder, and in southern China not, especially for some other areas in the south have Meiyu weather, long-term damp, putty film formation is not good, will also powder, Therefore, we are so students in some countries and regions to adapt to the waterproof putty with gray calcium powder.

Cause seven

Ash calcium powder, white cement and other inorganic metal binders are not pure, mixed with a lot of double fly powder. The so-called multi-functional gray calcium powder and multi-functional white cement on the market are not pure, because a lot of money is needed to use inorganic composite binders that are impure through these ideas, and the putty for internal and external wall waterproof must be depowering.

Reason eight

In summer, the external wall putty is not enough to retain water, especially in high temperature ventilation places such as high-rise doors and Windows, gray calcium powder, cement initial setting time is not enough, water has been lost, maintenance is not good, and the powder is seriously removed.

Reason nine

Not timely grasp the calendering time, not timely calendering treatment;

Reason ten

The putty powder has passed the shelf life, which will cause the bonding strength to decline.

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