2014年1月23日星期四

The main reason heat stabilizer for shoes heat discoloration

Thermal stabilizers should preferably absorb both HCL, to eliminate the

active site, the addition of a conjugated polyene chain, carbenium salt

damage, etc. to prevent auto-oxidation, which does not produce the product

of the catalytic degradation of PVC. The Plastic impact modifier  actual heat stabilizers have

different functions due to exhibit different thermal stability

characteristics, can be divided into early-type, long-term, intermediate-

and versatile four.
Shandong Zouping, this piece of land has been brought up generation phase

of Fan, its famous through the ages "first and worry about the world,

after the world music", popular for generations lips.
A) cadmium, zinc soap is typical of early-type heat stabilizers, can

quickly absorb HCL, and effectively substituted with carboxylate PVC

unstable chlorine atom in the catalytic chain Cd, Zn, thereby effectively

suppressing early degradation and coloring , but because of the

consumption of fast and transformation products CdC12, ZnC12, but also off

the HCL efficient catalyst PVC, PVC and  Chlorinated paraffin thus lead to the degradation of

the material suddenly vicious black, so poor long-term thermal stability.
2) barium, calcium soaps are typically long-term thermal stabilizers,

absorption HCL function only and therefore can not inhibit coloring PVC,

but the conversion product BaC12, CaC12 do not have catalytic activity,

does not cause a sudden black PVC, long-term heat stability better.
3) fatty acids, organic tin are intermediate, both absorption HCL, can

effectively replace with carboxylate unstable chlorine atoms PVC chain,

and transformation products do not have catalytic activity.
4) mercaptan organotin it has versatile Polyethylene wax  features, while a variety of

mechanisms can stabilize PVC, transformation products do not have

catalytic activity, and therefore both excellent initial and long-term

thermal stability effect.

2014年1月20日星期一

Some of the major components of plastic lubricant

We are not a pure plastic material generally used , which is made ​​of material prepared by a number . Wherein the polymer (or synthetic resin ) is the main component of plastic, in addition , in order to improve the performance of plastics , but also add a variety of auxiliary materials such as fillers , plasticizers , lubricants , stabilizers in the polymer, coloring agents , in order to become a good performance plastics.
A synthetic resin, synthetic resin is a main component of plastic, the plastic content is generally 40% to 100%. As  WSD aluminium stearate the content of large, but the nature of the resin often determines the nature of plastic, so people often plastic resin as a synonym . For example, polyvinyl chloride resin and PVC , phenolic resin and phenolic confused. In fact, resins and plastics are two different concepts. Original polymer resin is a raw , it is not only used to make plastics , but also coatings, adhesives and synthetic materials. In addition to the very small number of plastic resin containing 100% , the majority of plastics , in addition to the main component of the resin , but also need to add other substances.
2 , also known as filler of fillers , which can improve the strength and resistance to heat , and cost . E.g. a phenolic resin is added after the flour can greatly reduce costs, the most inexpensive one phenolic plastics , as well as significantly improved mechanical strength. The filler may be divided into two types of inorganic fillers and organic fillers , such as wood flour former , rags , paper and various textile fibers , which, as glass fibers, diatomaceous earth , asbestos , carbon black and the like.
3 , a plasticizer , and a plasticizer to increase the flexibility of the plastic plasticity , reducing brittleness , so that the plastic processibility . Plasticizers are generally miscible with the resin , non-toxic , odorless, light, heat stable, high boiling point organic compounds, the most commonly used phthalates . E.g., the production of PVC , plasticizer , if adding more soft PVC can be obtained , if not add plasticizers or less (the amount of < 10% ) , then a rigid PVC .
4 , a stabilizer to prevent the WSD Chrolinated polyethylene  synthetic resin by the action of light and heat during use in the processing and decomposition and destruction, extended service life , to add the stabilizer in plastics . Commonly used are stearates, such as epoxy resin .
5 , plastic colorant colorants can have a variety of bright , beautiful colors. The organic dyes and inorganic pigments used as a colorant . Specialty Plastics
6 , the lubricant is to prevent the lubricant in the molding of plastic stick on the metal mold, while allowing a smooth plastic surface appearance . Commonly used lubricants are stearic acid , calcium and magnesium salts and the like .
7 antioxidants prevent the plastic molding or WSD Chlorinated paraffin  heating at high temperature thermal oxidation during use , leaving yellow plastic , hair crack , etc. In addition to the above additives , the plastic may also be added flame retardants, foaming agents, antistatic agents so as to meet different requirements .

2014年1月19日星期日

Lubricants can be divided into several

Friction portion for lubrication, cooling and sealing machine

materials.
According to sources of mineral lubricant (such as machine oil),

vegetable lubricant (such as castor oil) and animal lubricant (such as

tallow). In addition, synthetic lubricants, such as silicone oils,

fatty acid amide, oleic acid, polyester, synthetic esters, carboxylic

acid. Depending on the properties of WSD PVC lubricants  the lubricating oil, oily liquid,

semi-solid grease-like and solid lubricant grease.
  Can be divided according to the use of industrial lubricants

(including oil and grease), the body lubricant.
Many types of lubricants, are widely used. Lubricant is also used to

improve flowability and releasability and other plastic processing, to

prevent adhesion of the mold in the machine and fish eyes or other

defects. Industrial Lubricants
The main function is to reduce the friction surface friction damage.

However, due to a wide range of industrial machinery, machinery mainly

to meet the requirements of lubricants to reduce friction, wear, there

are some special requirements with different working environment,

working conditions and proposed. Divided into 1) Automotive Lubricants

2) industrial lubricants including machine oil (high oil), weaving oil,

spindle oil, rail oil, rolling oil, gas  WSD chromium oxide turbine oil, compressor oil,

refrigeration oil, cylinder oil, bunker oil, gear oil, engine pressure

gear oil, axle oil, instrument oil, vacuum pump oil (
 How to choose the right lubricant body
 Insufficient vaginal lubrication, it will increase the pain during

sex, some of the older women simply give up sex. "At this point in

relation to moderate use of lubricants, one to improve the sensitivity

of the clitoris; secondly, can not, through excessive drying of vaginal

discomfort.."
  For water-soluble and oil-based lubricants market, "in essence no

difference between the two, but the water-soluble relatively easy to

use, easy to clean up afterwards, but also to prevent allergies." Also,

try not to use the additional role WSD Chrolinated polyethylene with sterilization lubricants,

single function products safer to use. "In the hospital to buy the

lubricant is definitely the safest, followed to some large pharmacies,

large supermarkets and regular sex shop to buy."

2014年1月17日星期五

Paraffin put more put less plasticizer is internal / external lubricant

pvc products , the wax is put more plasticizers, put less is internal / external lubricant ?
Paraffin said here refers to the full name of " wax " or " paraffin " ?
I read some of the recipe data , some WSD Titanium dioxide rutile  put more than 20 PHR , put some 0.5 PHR.
2 . Put more than 20 PHR definitely soft products plasticizer use , and that this situation will not have a lubricating effect ? Inside or outside lubrication lubrication ?
3 release 0.5 PHR , is not no use as a plasticizer ? Only as a lubricant ? Inside or outside lubrication lubrication ? And this ratio is only hard copies of articles for the formulation , and not for  WSD Plastic impact modifier the soft goods formulations are typical chlorinated plasticizer . Copies may want to add to the dozens . All adds a plasticizer has the role of lubrication . But within five hardware products , or the need to add additional components within the slide . Added to 20 parts plus without actually depends on the slip process , as well as product performance, such as the current size of the host processing .
 Paraffin is carbon saturated hydrocarbons , petrochemicals inside out , which is used in pvc play a significant WSD Polyethylene wax  role outside the slide , add the amount is generally less than 1 .
 The role of the gap between the two played in pvc processing is relatively large . See you write so seriously , I suggest you book early aspects of pvc look , or online to understand their role under the type of pvc accessories . Easy to understand for the recipe .

2014年1月16日星期四

The main performance lubricants commonly used PVC

Common PVC lubricants [2] The main properties are as follows: calcium (1) stearic acid:
White powder, mp 148-155 ℃, non-toxic, have excellent lubricity and workability, no sulfide contamination with lead and basic lead salt soap and use, can increase the rate of gelation, the dosage is generally 0.1-0.4PHR.
(2) polyethylene wax
White or light yellow powder or granules contain small amounts of oxidized polyethylene wax, although polar group is still compatible with the PVC, but the higher the efficiency of the lubrication can be improved lubricity between the polymer and the metal, improving the WSD PVC lubricants  extrusion efficiency, improve a colorant dispersion, gives the product a good transparency and gloss. The amount of 0.1-0.5PHR.
(3) stearate
White or light yellow granules, mp 70-71 ℃. Slow evaporation at 90-100 ℃, as external lubricant in PVC processing hardware, the amount is usually 0.2-0.5PHR, and have the effect of preventing scale chromatography, but easy to use excessive blooming.
(4) Glyceryl stearate
Powder substance, melting point 85-87 ℃, has excellent heat resistance and flowability, increase the amount of filler, may contribute to the plasticizing. And waxes and use, to improve the thermal stability of PVC-U. General amount of 0.2-0.6PHR.
In practice it was found that when two or more with the use of the lubricant, when used alone with the emergence of WSD Titanium dioxide rutile  a different effect. In profile formulations, the way they use complex
(5) Paraffin
Melting point 57-63 ℃, no polar group, is a typical external lubricant. Because of its low melting point, easy to evaporate, a small melt viscosity, only within a narrow range from lubrication, suitable for single, twin-screw extruder, the general amount of 0.1-0.8PHR. This product is poor transparency, easy to whiten.
(6) Polyethylene wax
White powder, a softening point of about 100-117 ℃, due to its relatively large molecular weight, high melting  WSD Stabilizers for pipe point, low volatility and therefore at a higher temperature and shear rate, also showed significant lubricating effect. For hard PVC single, twin-screw extruder, the usual dose is 0.1-0.5PHR.

2014年1月14日星期二

Pvc composite stabilizer when using the issues that need attention

Now inside the home when the renovation will always be involved in a variety of coatings, paints, latex, etc., and pvc composite stabilizer is also a large number of these kind of decoration materials. As we all know, this material is a polymer compound used in the process, we need to pay attention to a lot of precautions.
First of all, before we open the WSD PVC lubricants  packaging of this material, we must ensure that the air circulation around. Because pvc composite stabilizer is highly volatile characteristics, while some of the material composition if not timely flow will cause some damage to the human body in a small space. This is why after the house renovated, within three months do not advise clients to stay, but you want to come out of vacant houses, ventilation diffuser.
Ensure that the air circulation around after we unpack, they also need to know that this material is a liquid or powder form. Is divided into two kinds of liquid and solid existence Pvc composite stabilizer under normal circumstances. If it is a liquid, we use the process on  the need to pay attention to a lot of problems, can not let these material gets on our skin, but can not let our mouth ENT inside the eye gets these WSD PVC flame retardant  things. When in use must be primarily own security.
The powdery composite stabilizer, we need to keep dry surroundings, pay attention to the fire. In general, a powdery stabilizer liquid stabilizer avoidance safer convenience. But nevertheless, we are both in use which we still need to pay attention to their own protection. As long as we have a reasonable use of these materials, while WSD Azodicarbonamide  avoiding disadvantages, we can bring endless benefits for our building homes.

2014年1月7日星期二

Component structure and application details of anatase titanium dioxide

First, the composition and structure of the rapid development of anatase titanium dioxide industry , anatase titanium dioxide industry has undergone great changes. So I believe the application of its products, netizens have also had a lot of knowledge and understanding. Here are the experts gives a detailed introduction. ( A ) , oil and water-based cosmetics into the anatase titanium dioxide , due to its chemical stability, high refractive index , high hiding power , whiteness is very good, and  PVC lubricants pollution , it is widely used in the field of cosmetics , from cosmetic whitening effect.
Features : ①, whiteness, hiding power is very strong. ②, the weather is very strong , suitable sunscreen whitening system. Usage and dosage : ①, widely used in cosmetic whitening powder, foundation, powder , pearl cream , facial mask, sunscreen and other cosmetic products. ②, sufficiently dispersed into the powder medium and then added to the system used , must ensure the uniform dispersion added . ( Two ) , cosmetic grade titanium dioxide Security: This series has been tested not hazardous to humans . And eye contact may cause mild eye discomfort . When in contact with the skin , does not appear adverse reactions. Enamel transparency with anatase titanium dioxide prepared , and has a small mass , impact resistance, good mechanical properties, colorful, easy to pollution.
(C ) Application Guide: wherein the aqueous dispersion of titanium dioxide can be easily added to the water , stir dispersed into the emulsion . Optional polyol is water dispersible carrier , you can easily and most reasonable use with cosmetics . Made of human skin slightly acidic , so weakly acidic skin care products should be matched . Second, the application performance with details Note We know that in everyday life we ​​are exposed from time to time on the application of titanium dioxide , for example, cosmetics, paints and the like, then the performance of  Chlorinated paraffin specific applications for titanium dioxide , what does ? Here are some detailed description: 1 , and the main way to improve the stability of anatase titanium dioxide whiteness affect the elements of anatase titanium dioxide whiteness there are many, for example, have an impact mineral resources , but also the impact of equipment and key technologies. Proved by several major factors affecting the degree of whiteness are: quality hydrolysis , removal of the impurity element and calcination conditions .
Anatase titanium dioxide hydrolysis technology , currently in the country have mainly two types of pressurized and atmospheric hydrolysis , hydrolysis and product quality from the point of view, the quality of atmospheric hydrolysis under normal circumstances are better, hydrolysis uniform particle size . To ensure good water quality , must take the concentrated liquid titanium quality indicators , control iron titanium ratio and solid content within the specified range , while increasing control of the operating conditions of hydrolysis . 2 , by surface treatment to improve application performance titanium dioxide powder is a very strong polarity , the hydrophilic nature is oleophobic , if the adsorption air and other types of pollutants , the dispersibility of the water relatively low, we often need to be processed on its surface , the treating agent is used frequently hydrated alumina and hydrated silica. 3, stable particle size distribution of titanium dioxide , titanium dioxide dispersion and improved ways to  stearic acid hiding on the titanium dioxide particle size distribution is a more complex indicators , which it has serious implications for the application of titanium dioxide pigment performance and product performance , therefore, dispersion of research we can analyze directly from the particle size distribution. Elements on the titanium dioxide particle size distribution is relatively complex , the first primary particle size hydrolysis , the hydrolysis by the control and regulating method for making the primary particle size can be maintained within a certain range. Followed by calcination temperature , calcination metatitanic process , the particles undergo a transformation of crystalline phase and growth, proper control of temperature, so that the growth of particles can be maintained within a certain range.

2014年1月5日星期日

PVC heat stabilizers commonly used test methods which

To introduce PVC heat stabilizers of two common test methods. Something called : Torque Rheometer test method ; second test called the roll blackened test method. PVC heat stabilizers torque rheometer test method
Torque rheometer is an imitation of the actual PVC processing a typical small scale type instrument . The outside of the instrument has a closed processing tank , through a computer connected to the instrument can be controlled by the temperature of the processing tank , and  the rotation of the two rollers inside the added mass of material is PVC lubricants  generally a torque rheometer 60 ~ 80 g, depending on the instrument models and different. Experimental steps : preparing in advance the type comprising a heat stabilizer masterbatch based masterbatch formulations except PVC lubricant. Torque rheometer temperature set in advance , and when the temperature rose to specify the speed smoothly , it will weigh a good mix added processing tank , quickly closed the recording of various parameters on the computer connected to it , is the flow curve . After processing is complete, you can also get different physical characteristics of the Chrolinated polyethylene  extrudate , such as whiteness, whether shaping , smoothness and so on. With these parameters, you can determine the appropriate industrial potential heat stabilizers , heat stabilizers suitable should have proper torque and plasticizing time , extrusion molding should be better and whiteness, smooth surface and so on.
PVC heat stabilizers roll blackened test
As a method for dynamic determination  Stabilizers for pipe based adjuvant effect of a thermal stabilizer , in the absence of double roller dynamic rheometer using a twin roll selected experiments tableting equipment, which together with the high-speed mixed powder , tablet molding, the resulting samples were subjected to extruded repeatedly until the black test piece until the recording time of the fully black , called blackening time . By comparing the length of time to determine the blackening of different thermal stabilizers for PVC thermal stability effect.

2014年1月3日星期五

PVC lubricants commonly used in the seven species

PVC lubricant is usually tasteless , odorless , non-toxic light yellow waxy solid or flake . Physical indicators: PVC lubricants in the plastics industry is mainly used as mold release agents , plasticizers , antistatic agents , especially for plastic foam products, anti-shrinkage agents. In the production of PVC products as lubricants , and alkyd resin can be used as a modifier , a plasticizer of cellulose nitrate . PVC lubricants commonly used in seven types : calcium ( 1 ) stearic acid : white aluminium stearate  powder , melting point 148-155 ℃, non-toxic, have excellent lubricity and machining , non- sulfide pollution , and basic lead salts and lead soap and use, can increase the rate of gelation , the dosage is generally 0.1-0.4PHR. ( 2 ) white or yellow oxidized polyethylene wax powder or granules , containing a small amount of the oxidized polyethylene wax, a polar group , although still not compatible with PVC, but the higher the efficiency of the lubrication can be improved lubricity between the polymer and the metal improve extrusion efficiency , improve the dispersibility of the colorant , giving the product a good transparency and gloss. The amount of 0.1-0.5PHR. ( 3 ) stearic white or slightly yellow granules , mp 70-71 ℃. Slow evaporation at 90-100 ℃, as external lubricant in PVC processing hardware , the amount is usually 0.2-0.5PHR, and have the effect of preventing scale chromatography , but easy to use excessive blooming . ( 4 ) glyceryl stearate powder substance , melting at 85-87 ℃, has excellent heat resistance and flowability , increase the amount of filler , may contribute to the plasticizing . And waxes and use, to improve the thermal stability of PVC-U . General amount of 0.2-0.6PHR. In  Chrolinated polyethylene practice it was found that when two or more with the use of the lubricant , when used alone with the emergence of a different effect . In profile formulations, they use complex methods ( 5 ) wax melting point 57-63 ℃, no polar group , is a typical external lubricant . Because of its low melting point, easy to evaporate , a small melt viscosity , only within a narrow range from lubrication, suitable for single , twin-screw extruder , the general amount of 0.1-0.8PHR. This product is poor transparency , easy to whiten.
( 6 ) polyethylene wax white powder, a softening point of about 100-117 ℃, due to its relatively large molecular Chlorinated paraffin  weight , high melting point , low volatility and therefore at a higher temperature and shear rate , also showed significant lubricating effect. For hard PVC single , twin-screw extruder , the usual dose is 0.1-0.5PHR.