Huijie Steel Pipe provide variety
of Alloy Steel Mechanical Tubing for automotive parts,ball and roller bearing
tubes,
wire-line Drill Pipes,boiler tubes,heat-exchanger tubes,oil field Drill pipes,engineering machinery,etc.The
cold drawn
and cold rolled Alloy Steel Tubes,Supplied as
DIN,ASTM,ASME,EN,BS,JIS,GOST,GB etc standard including the steel grade:
Boiler Steel Tubes Grade:
T2, T5, T9, T11, T12, T17,
T21, T22, T91,T92, 15Mo3,16Mo3, 13CrMo44,
10CrMo910, 12CrMo910,
11CrMo910, 12Cr1MoVG
Mechanical alloy tubing:
AISI4130, SAE4140, 40Cr,
40Cr4,8620H,16MnCr5,20MnCr5
38Cr2MoAlA, 38CrMoAl, 38H2MUA, 38X2МЮÐ,10Mn2,20Mn2
Bearing tubes:
100Cr2,100Cr6,52100,GCr15,SUJ2,100CrMo7-3
Rock drill pipes:
SAE1541,AISI4130,XJY650,XJY750,XJY850,40Mn2,20Mn2,37Mn5,R780
Alloy Steel Mechanical Tubing Alloy Steel Tubes,Seamless Steel Pipes,Seamless Steel Tubes,Alloy Steel Mechanical Tubing Ningbo Huijie Steel Pipe Manufacturing Co.,Ltd , https://www.hjbearingtube.com
25CrMo4, 35CrMo, 35CrMo4, 42CrMo4, 34CrMo4,
20MnV6, 20MnV6,20CrMn,
To measure the transparency of some plastics , there are many standards, such as light transmittance, haze, refractive index birefringence and dispersion, etc., to see if the hardness and strength of the material are required. Transparent injection molding products, generally use PS, PMMA, SNA (AS) materials and other materials, but they all have a brittle problem that needs attention.
PS is a general-purpose plastic and the price is not higher than the price of PP (transparent). If the transparency of PP (crystalline material) is continuously increased, it is necessary to suppress crystallization during material preparation, so the cost is high.
According to the light transmittance of the material, it can be divided into:
Transparent material: the transmittance of visible light with a wavelength of 400nm-800 nm is above 80%;
Translucent material: light transmittance of visible light between 400 nm and 800 nm is between 50% and 80%;
Opaque material: 400 nm -800 nm visible light has a refractive index below 50%.
According to the above classification, the resin can be divided into transparent resin: mainly including PMMA, PC, PS, PET, PES, JD series, CR-39, SAN (also known as AS), TPX, HEMA, BS (also known as K resin). Etc.; Translucent resin: PP, PA; opaque resin: ABS, POM, PTFE, PF, etc.
Improve the principle of plastic transparency: reduce crystallinity, control clean quality, increase refractive index, and reduce birefringence.
Adding improved transparency of the plastic, a nucleating agent can be added, which is the most effective way to increase the transmittance of the transparent resin, which can promote the crystallization of small molecular substances. It can function as a nucleus in the resin.
Blending improves the transparency of plastics by adding other resins to the transparent resin to improve transparency.
The two-way stretching improves the transparency of the plastic, and can break the original crystal particles in the product to make the crystal size smaller, and achieve the purpose of improving the light transmittance.