阅读说明：本技术 一种用作沙障的硬挺抗老化人棉及其制备方法 (Stiff anti-aging rayon used as sand barrier and preparation method thereof ) 是由 王海峰 高艳娥 管永华 段志豪 徐杨 丁志荣 于 2019-11-04 设计创作，主要内容包括：本发明属于防沙治沙环保技术领域,公开了一种用作沙障的硬挺抗老化人棉及其制备方法,将人棉浸渍在含有硬挺整理剂700～800g/L,保护剂60～80g/L,催化剂14～16g/L和防紫外整理剂40～60g/L的整理液中进行二浸二轧处理,然后进行预烘和焙烘处理,得到用作沙障的硬挺抗老化人棉。该方法制备得到的硬挺抗老化人棉具有硬挺性能好、抗风能力强、防风固沙效能高的特点,且价格较低廉,可生物降解,使沙障在使用周期内发挥效能,超过使用周期则自动降解,适合工业化推广。(The invention belongs to the technical field of sand prevention, sand control and environment protection, and discloses stiff anti-aging rayon used as a sand barrier and a preparation method thereof. The stiff anti-aging rayon prepared by the method has the characteristics of good stiffness, strong wind resistance and high wind and sand prevention and fixation efficiency, is low in price, can be biodegraded, enables the sand barrier to exert the efficiency in the service cycle, automatically degrades when the service cycle is exceeded, and is suitable for industrial popularization.)

1. A preparation method of stiff anti-aging rayon used as a sand barrier is characterized by comprising the following steps:

s1, soaking rayon in finishing liquor for two-soaking and two-rolling treatment, wherein the finishing liquor comprises the following components in percentage by weight: 700-800 g/L of stiffening finishing agent, 60-80 g/L of protective agent, 14-16 g/L of catalyst and 40-60 g/L of anti-ultraviolet finishing agent;

s2, carrying out pre-baking and baking treatment on the rayon obtained through the treatment in the step 1) to obtain stiff anti-aging rayon used as a sand barrier.

2. The preparation method according to claim 1, wherein the stiffening finishing agent is melamine resin, the catalyst is ammonium chloride, and the mass ratio of the melamine resin to the ammonium chloride is 50: 1.

3. the method of claim 1, wherein the protective agent is a polyvinyl acetate emulsion.

4. The method of claim 1, wherein the anti-UV finish is an anti-UV absorber UV-BS.

5. The method according to claim 1, wherein the rayon has a count of 5 to 10.

6. The method according to claim 1, wherein the mesh number of the rayon is 70 to 90 meshes.

7. The method according to claim 1, wherein the dipping time in step S1 is 5-10 min.

8. The manufacturing method according to claim 1, wherein the padder pressure of the double dipping and double rolling in the step S1 is 4-6 kg/m²The mangle rolling rate is 120-140%.

9. The preparation method according to claim 1, wherein the pre-drying temperature is 100-120 ℃, the pre-drying time is 3-5 min, the baking temperature is 150-170 ℃, and the baking time is 90-120 s.

10. A stiff anti-aging rayon used as a sand barrier, prepared by the preparation method according to any one of claims 1 to 9.

Technical Field

The invention relates to the technical field of sand prevention and control and environmental protection, in particular to stiff anti-aging rayon used as a sand barrier and a preparation method thereof.

Background

Land desertification not only directly causes the reduction of land quality and the reduction of available land resources, but also causes the aggravation of natural disasters and restricts the economic development of sand areas. Laying sand barriers is one of effective measures for preventing and fixing sand. At present, the sand-blocking technology which is widely applied comprises grass grid sand-blocking, clay sand-blocking, chemical fiber material sand-blocking and the like. The grass square sand barrier is degradable and pollution-free, but is easy to rot and fall down, and has short service life. The clay sand barrier is made of local materials and is convenient to construct, but is not suitable for areas without abundant clay. The sand barrier made of chemical fiber material has good sand-proof effect, but poor degradability. As can be seen from the application conditions of the sand barriers, no professional, convenient and generally applicable sand barrier can meet the requirements of sand prevention and sand fixation in most areas.

Disclosure of Invention

In view of the above, the invention aims to provide stiff and anti-aging rayon used as a sand barrier and a preparation method thereof.

In order to solve the technical problems, the invention provides a preparation method of stiff anti-aging rayon used as a sand barrier, which comprises the following steps:

s1, soaking rayon in finishing liquor for two-soaking and two-rolling treatment, wherein the finishing liquor comprises the following components in percentage by weight: 700-800 g/L of stiffening finishing agent, 60-80 g/L of protective agent, 14-16 g/L of catalyst and 40-60 g/L of anti-ultraviolet finishing agent;

s2, carrying out pre-baking and baking treatment on the rayon obtained through the treatment in the step 1) to obtain stiff anti-aging rayon used as a sand barrier.

Preferably, the stiffening finishing agent is melamine resin, the catalyst is ammonium chloride, and the mass ratio of the melamine resin to the ammonium chloride is 50: 1.

preferably, the protective agent is polyvinyl acetate emulsion.

Preferably, the ultraviolet-proof finishing agent is an ultraviolet-proof absorbent UV-BS.

Preferably, the count of the rayon is 5-10.

Preferably, the mesh number of the rayon is 70-90 meshes.

Preferably, the dipping time in the step S1 is 5-10 min.

Preferably, the pressure of the padder for the two-dipping and two-rolling in the step S1 is 4-6 kg/m²The mangle rolling rate is 120-140%.

Preferably, the pre-drying temperature is 100-120 ℃, the pre-drying time is 3-5 min, the baking temperature is 150-170 ℃, and the baking time is 90-120 s.

The invention also provides the stiff anti-aging rayon used as the sand barrier, which is prepared by the preparation method.

Compared with the prior art, the invention takes the plant fiber fabric rayon which can be naturally degraded as the main material, selects proper rayon, and carries out padding treatment on the rayon by using the finishing liquid containing the stiffening finishing agent, the protective agent, the catalyst and the anti-ultraviolet finishing agent, thereby increasing the stiffness of the rayon, simultaneously not influencing the breaking strength of the rayon, and obviously improving the anti-ultraviolet performance of the rayon. Experiments show that the breaking strength, the bending length and the ultraviolet protection coefficient UPF of the rayon sand barrier prepared by the method are greatly improved, and the windproof efficiency reaches 40-60 percent.

Detailed Description

For a further understanding of the invention, reference will now be made to the preferred embodiments of the present invention by way of example, and it is to be understood that the description is intended to further illustrate features and advantages of the present invention and is not intended to limit the scope of the claims which follow.

All of the starting materials of the present invention, without particular limitation as to their source, may be purchased commercially or prepared according to conventional methods well known to those skilled in the art.

The invention provides a stiff anti-aging rayon used as a sand barrier and a preparation method thereof, wherein the stiff anti-aging rayon comprises the following steps:

s1, soaking rayon in finishing liquor for two-soaking and two-rolling treatment, wherein the finishing liquor comprises the following components in percentage by weight: 700-800 g/L of stiffening finishing agent, 60-80 g/L of protective agent, 14-16 g/L of catalyst and 40-60 g/L of anti-ultraviolet finishing agent;

s2, carrying out pre-baking and baking treatment on the rayon obtained through the treatment in the step 1) to obtain stiff anti-aging rayon used as a sand barrier.

The invention soaks the rayon in the finishing liquor containing stiffening finishing agent, protective agent, catalyst and anti-ultraviolet finishing agent and carries on two soaks two rolls. In order to enable the rayon to have better stiffness, the rayon with the number of 5-10 meshes and the mesh number of 70-90 meshes is preferably adopted in the invention, and the rayon with the number of 8 meshes and the mesh number of 80 is more preferably adopted. The finishing liquid comprises the following components in percentage by weight: 700-800 g/L of stiffening finishing agent, 60-80 g/L of protective agent, 14-16 g/L of catalyst and 40-60 g/L of anti-ultraviolet finishing agent. Because the rayon adopted in the invention is the yarn which is not pretreated, the dilution permeability is poor, the impregnation time is prolonged, and the permeation of the finishing liquid is facilitated, thereby improving the finishing effect. Therefore, the dipping time in the invention is preferably 5 to 10 min. When the two-dipping and two-rolling treatment is carried out, the preferable pressure of a padder is 4-6 kg/m²More preferably 5kg/m²The mangle expression is preferably 120 to 140%, and more preferably 130%.

In order to achieve a better stiffening finishing effect, the invention preferably adopts melamine resin with higher cost performance as a stiffening finishing agent, the melamine resin is easy to generate self-crosslinking under the influence of acid conditions and catalysts, and reacts with active groups such as hydroxyl, amino and the like on the fibers to form a net structure among the fibers, so that the movement among fiber macromolecular chain segments is restrained, and the relative slippage of the molecular chain segments and the fibers is reduced, thereby improving the bending rigidity of the sand barrier. On the other hand, the melamine resin is cured at high temperature to form a film on the surface of the fiber, and the bending rigidity of the sand barrier is improved to a certain extent. In order to better realize self-crosslinking, ammonium chloride with weak acidity is preferably used as the catalyst in the invention, and the mass ratio of the melamine resin to the ammonium chloride is preferably 50: 1.

the melamine resin finishing agent is used for finishing the sand barrier, not only meets the requirement of stiffness, but also does not have the problem of difficult degradation, and simultaneously is not easy to deteriorate and lose efficacy. However, as the thermosetting resin, the finished sand barrier has poor breaking strength and is easy to age and damage, so that the polyvinyl acetate emulsion is selected as the strong protective agent in the invention. On one hand, the polyvinyl acetate emulsion can be solidified on the surface of the fiber to form a plastic film under the high-temperature baking, and on the other hand, due to the addition of the polyvinyl acetate emulsion, the yarn curl is reduced, and the yarn has certain cohesive force on the fiber, so that the bending rigidity of the sand barrier can be improved to a certain extent. Meanwhile, as plastic resin, polyvinyl acetate emulsion is used as a filler, and the function of a protective agent is shown in stiffening finishing.

The rayon sand barrier is easy to undergo photoaging under the irradiation of ultraviolet rays. Uv-blocking finishes are generally divided into absorbers and reflectors. The reflecting agent realizes ultraviolet prevention for human bodies by utilizing the reflection effect of the reflecting agent on ultraviolet rays, and has no direct effect on the aging resistance of fibers. And the absorbent can absorb and convert ultraviolet rays into lower energy to be released, so that the radiation effect of the ultraviolet rays on the sand barrier is reduced. Therefore, the invention preferably selects the ultraviolet-proof absorbent UV-BS with better ultraviolet-proof effect to finish the cotton sand barriers, thereby better reducing the aging effect of ultraviolet rays on the sand barriers.

And (3) after the rayon is subjected to two-dipping and two-rolling treatment, pre-baking and baking treatment are carried out, and the stiff anti-aging rayon used as the sand barrier is obtained. In the invention, the pre-drying temperature is preferably 100-120 ℃, more preferably 110 ℃, and the pre-drying time is preferably 3-5 min, more preferably 3 min; the baking temperature is preferably 150-170 ℃, more preferably 160 ℃, and the baking time is preferably 90-120 s, more preferably 90 s.

The invention also provides the stiff anti-aging rayon used as the sand barrier, which is prepared by the preparation method.

In order to further illustrate the present invention, the following examples are provided to describe a stiff anti-aging rayon used as sand barrier and its preparation method in detail.