The foamed sponge will turn yellow, what is the best sponge anti yellowing agent recommended

Sponge anti-yellowing agent GSY-6016 is recommended to use sponge anti-yellowing agent GSY-6016 is a liquid anti-yellowing stabilizer recommended for polyurethane sponges, it has good heat resistance and low volatility, is not sensitive to the formula of sponge, and has a good anti-yellowing effect on various cotton species of 22-50.

The yellowing of fabrics can not be solved by anti-phenolic yellowing agents, and anti-phenolic yellowing agents are mainly used to solve the phenolic yellowing of fabrics or to prevent phenolic yellowing of fabrics. Specifically, please refer to the following content: Nylon anti-phenol yellow finishing agent LD-RPY can effectively reduce the phenolic yellowing phenomenon caused by the storage of lightweight fabrics in synthetic packaging.

1. Physical indicators Standard 1, appearance yellow or brown liquid 2, ionic anion 3, water-soluble soluble in cold water 4, packaging 125kg plastic drum packaging.

2. Characteristics: Anti-yellowing agent LD-RPY reduces the phenolic yellowing phenomenon caused by the storage of lightweight fabrics in synthetic packaging. Phenolic yellowing is caused by BHT (1,6-dibutylhydroxytoluene), while the antioxidant in the packaging contains BHT.

3. Scope of use: 1. The anti-yellowing agent LD-RPY is mainly suitable for nylon, and can also be used for cotton. 2. The dosage of this product depends on the type of fiber and the degree of yellowing.

Fourth, the use of the product: this product can be impregnated, soaking process. 1. Impregnation process:

It can be used for hydrogen peroxide bleaching, reductive bleaching, washing, whitening and soft baths. Dosage: 1-3% antiflavant ld-rpy Remarks:

When this product is used in high-speed running machines, it is recommended to add a defoamer to avoid foam formation. 2. Impregnation process: generally used in combination with softener and whitening agent, but it should be tested and evaluated before action.

Dosage: 10-30g L antiyellowing agent LD-RPY, adjust pH with acetic acid Phenolic yellowing also depends on the pH value of the fabric, so the pH value must be adjusted below during the dipping process.

Summary. The foam sponge will turn yellow in half a year.

How long is it.

At least there's a time limit, right?

In general, from the perspective of additives, the yellowing of sponges includes the following four types:

1. During the sponge foaming process, the yellowing of thermal and oxidative aging caused by high temperature is made.

2. Yellowing caused by contact with nitrogen oxides (NOx) in the air.

3. Fabric pollution caused by sponges.

4. Yellowing caused by sponge contact with ultraviolet rays.

Sponge material type:

1. Chemical sponge.

Polyurethane soft foamed rubber, polyurethane is the most common polymer material in life, widely used in the production of various "sponge" products. As well as elastic materials for shock-absorbing, anti-friction uses, such as shoe soles, tractor tank track substrates.

2. Industrial sponge.

There are many types of sponges used in industrial production, including foam cotton, shaped cotton, rubber cotton, memory foam, etc.

Summary. You can soak and rinse with a detergent with a bleach effect, such as hydrogen peroxide, remember to rinse well, and wrap toilet paper after each wash for great results.

The reason for the yellowing is that the detergent residue is not washed clean, and it will turn yellow after a long time. Or use the detergent used for washing dishes and rinse with water, then wrap it in toilet paper and put it in a ventilated place, not in a place where there is enough sunlight. You can soak and rinse with a detergent with a bleach effect, such as hydrogen peroxide, remember to rinse well, and wrap toilet paper after each wash for great results.

The reason for the yellowing is that the detergent residue is not washed clean, and it will turn yellow after a long time.

White canvas shoes should not be left to dry in the sun, but should be dried in the shade and in a well-ventilated place. Try to use neutral detergent when brushing shoes, and when you wash and dry, you can take white paper (preferably white toilet paper) to wrap the shoes whole, and when the shoes are dry, you will find that the shoes have no yellow marks, but there are many yellow marks on the toilet paper. Or use the detergent used for washing dishes and rinse with water, then wrap it in toilet paper and put it in a ventilated place, not in a place where there is enough sunlight.

You can also wash your shoes with soap or laundry detergent first, and soak the washed sneakers in beer3.

How to deal with yellowing of sponges.

You can use a detergent with a bleaching effect, such as hydrogen peroxide, to soak and rinse, and remember to rinse it well and wrap it in toilet paper after each wash for great results. The reason for the yellowing is that the detergent residue is not washed clean, and the search will turn yellow after a long time. Or use the detergent used for washing dishes and rinse with water, then wrap it in toilet paper and put it in a ventilated place, not in a place where there is enough sunlight.

You can soak and rinse with a detergent with a bleach effect, such as hydrogen peroxide, remember to rinse well, and wrap toilet paper after each wash for great results. The reason for the yellowing is that the detergent residue is not washed clean, and it will turn yellow after a long time. White canvas shoes should not be left to dry in the sun, but should be dried in the shade and in a well-ventilated place.

Try to use neutral detergent when brushing shoes, and when you wash and dry, you can take white paper (preferably white toilet paper) to wrap the shoes whole, and when the shoes are dry, you will find that the shoes have no yellow marks, but there are many yellow marks on the toilet paper. Or use the dishwashing detergent and rinse it with water, then wrap it in toilet paper and put it in a ventilated place, not in a sunny place. You can also wash your shoes with soap or laundry detergent first, and soak the washed sneakers in beer3.

minutes, then take the sneakers to the balcony, place them in the shade, and cover them with toilet paper on the upper.

Many sponge manufacturers, especially some high-end sponge manufacturers, have tried to improve the anti-yellowing performance of sponges by adding antioxidants and light stabilizers, but the results are not significant. Antioxidants fundamentally provide a set of solutions for sponge yellowing, and this paper will combine the upstream and downstream characteristics of polyol and sponge production to systematically analyze the causes of sponge yellowingIn general, from the perspective of additives, the yellowing of sponges includes the following four types:

1. Yellowing caused by sponge contact with ultraviolet rays.

2. Yellowing caused by contact with nitrogen oxides (NOx) in the air.

3. During the sponge foaming process, the yellowing of thermal and oxidative aging caused by high temperature.

4. Fabric pollution caused by sponges.

These yellowing changes are often directly related to antioxidants. In other words, the presence of antioxidants may have a positive inhibitory effect on some of the above yellowing, for example: the yellowing of thermal oxidation aging caused by high temperature during sponge foaming processing is inhibited by the addition of antioxidants; However, it can also have a negative effect and promote the occurrence of other types of yellowing, such as:

Amine antioxidants can promote yellowing of sponges when exposed to nitrogen oxides (NOx, mainly from vehicle exhaust) or ultraviolet rays in the air; The antioxidant BHT is the main cause of fabric pollution.

As a manufacturer in the sponge market, when getting a polyol, in addition to considering safety, cost and foaming performance, it is rare to evaluate the effect of the antioxidant system in the polyol on the yellowing of the sponge. And this factor, which is often ignored by everyone, hides an important reason for the yellowing of the sponge.

Normally, in an ideal state, the antioxidants present in the polyols can inhibit the aging and degradation of the polymer due to the high temperature generated by the foaming itself in the sponge foaming process, which not only ensures the safe production of the sponge foaming process, but also effectively prevents the yellowing of the core in the sponge foaming process. However, as the foaming of the sponge is completed, the antioxidants remaining in the sponge are prone to cause yellowing problems in many sponges.

There are 4 reasons why sponge products turn yellow:

1. Yellowing caused by sponge contact with ultraviolet rays.

2. Yellowing caused by exposure to nitrogen oxides (NOx) in the air 3. Sponge foaming During the processing process, yellowing due to thermal and oxidative aging caused by high temperature 4. Fabric pollution caused by sponge.

Yellowing of sponge products is often directly related to antioxidants With the completion of sponge foaming, the antioxidants remaining in the sponge are easy to cause many yellowing problems of sponges.