Comparative analysis of the composition of glass crisper and plastic crisper
[China Glass Network]
In summer, food is prone to deterioration. It is too wasteful to dump food that has not been eaten. Choosing the right way to preserve food is a matter of concern to every family. Food and health are closely related. The choice of crisper brands is getting more and more. The importance of the family, for example; the two kinds of crisper, glass crisper and plastic crisper that we often use better preservation effect? Which kind of food contact is healthier and harmless?
1, glass crisper
Tempered glass storage box and heat-resistant glass storage box
Advantages: Material safety, high transparency, heat-resistant glass can withstand high temperatures.
Disadvantages: Tempered glass will burst at high temperature, the product is cumbersome and brittle, not suitable for carrying, and the airtightness is not good.
2, plastic PP material storage box
Non-toxic, odorless, low density, strength stiffness, hardness and heat resistance are better than low-pressure polyethylene, can be used at about 100 degrees. Has good electrical properties and high-frequency insulation is not affected by humidity, density of 0. 90-0. 91, high heat resistance, toughness and chemical resistance are very good. A more common type of food plastic products.
Disadvantages: become brittle at low temperature, not wear-resistant, easy to age.
3, plastic PET material
Milky white or light yellow, highly crystalline polymer with a smooth, shiny surface. Excellent physical and mechanical properties over a wide temperature range. Heat resistant to 70 ° C, only suitable for warm drinks or frozen drinks, high temperature liquid, or heated to deform.
Such as mineral water bottles, so do not take mineral water bottles with hot water.
4, plastic PC material
An amorphous thermoplastic resin with excellent comprehensive performance, excellent electrical insulation, elongation, dimensional stability and chemical corrosion resistance, high strength; self-extinguishing, flame retardant, non-toxic, colorable, etc. advantage.
Disadvantages: The disadvantage is that the hardness is not as good as that of metal, the appearance is easier to scratch, and the PC glue releases bisphenol A when it is hot. Pay special attention when using this plastic container. Many cups and bottles use this material.
5, TritanTM material crisper
1) BPA-free, safe food contact material: no BPA in the polymerization process, no release of BPA during use, environmental protection requirements and FDA (US Food and Drug Administration) certification;
2) High molecular density, anti-oxidation, long-term storage of food, no odor residue, no pigmentation: as glass is clear and transparent, light transmittance >90%, haze <1%, crystal-like luster. It is resistant to corrosion by detergents, detergents, hydrocarbon solvents, oils, perfumes, etc.; it is resistant to hydrolysis in hot and humid environments.
3) High impact strength, can be used for high vacuum storage, to prevent atmospheric pressure extrusion deformation: according to ISO international standards, "no gap impact" does not break, "notched impact" strength is close to 1000J / m, higher than PC material, It is more than 300 times that of glass.
4) High temperature resistance, can be used for direct heating of microwave oven: 200 ° high temperature without deformation, no odor release.
5) The stress is small, strong and durable, and it will not be damaged after falling. After injection molding, the residual stress of the product is smaller than that of PC, and no subsequent annealing treatment is required. The product has less chance of cracking due to residual stress during use. Free fall from the second floor (5 meters height) without damage cracking.
The uncooled vanadium oxide (VOx) microbolometer infrared detector used in the thermal imaging lens can be electrically adjusted to obtain a clearer night vision image, with strong adaptability to severe weather, unattended automatic scanning, preset cruise and other functions.
We have different Optical Lenses for sale, you can check Distortionless Lens or Video Session Lens on our website. You can choose what you like or contact us.
Infrared lens, infrared thermal imaging lens, industrial lens
Dongguan Shengqiang Electronic Co.,Ltd , https://www.sqoptical.com