Guangzhou Rosin Packaging Co., Ltd
  • November 08, 2021
    PET raw material
    1. What is PET material? PET is a polymer material, the full name is polyethylene terephthalate, which is synthesized by transesterification of dimethyl terephthalate and ethylene glycol or esterification of terephthalic acid and ethylene glycol, and then the condensation reaction. This material is a milky white or light yellow, highly crystalline polymer with a smooth and shiny surface....
  • November 08, 2021
    Custom Made Process
    Customized process 1. Design and sample making The packaging process starts by designing the packaging format. We provide 3D drawings according to your requirement. After your confirming,we will make the sample mold. The sample mold are divided into two types: plaster mold and wooden mold. It takes 5-7 working days to finish sample making. After the sample mold is finished, we can make s...
  • July 18, 2022
    1. What is the product made of : PLA, also known as polylactic acid, is a polyester made through the fermentation under controlled conditions of a carbohydrate source like corn starch, tapioca roots, or sugarcane. Plants  → sugar →fermentation(lactic acid)→monomer production (lactide)→polymer production→PLA→polumer conversion→sheet of PLA for packaging or PLA for fibers etc.   2.&nb...
  • August 10, 2022
    PS raw material
    1. What is the product made of : PS (polystyrene plastic) refers to a class of plastics including styrene groups in the macromolecular chain, including styrene and its copolymers. Its characteristics are colorless, odorless and tasteless. PS is a relatively old plastic. After many years, its production process is relatively perfect. PS has good transparency (light transmittance of 88%-92...
  • August 15, 2022
    1. Introduction of CPET: CPET is a polyethylene terephthalate material, which is odorless, tasteless, colorless and non-toxic. It is recognized as the best food packaging material in the world today.  Products made of CPET material can be processed directly in the oven for various foods. It will not release any harmful substances and gases during the heating process, which is called gree...
  • September 09, 2022
    Commonly used sheet materials include PVC, PET, PP, PS and flocking sheets, gold-plated sheets and anti-static sheets based on these plastic. 1. Polyviny Chloride(PVC) : PVC is the most commonly used plastic material, its texture is very soft, strong toughness, and good plasticity. This material can be made into transparent and various colors, and is often used in various electronics, cosmetics, t...
  • October 12, 2022
    After customers approve the samples, they usually place a certain number of production orders. The production dispatch meeting will decide which mold to use for mass production according to the output and the complexity of plastic forming. The blister machine heats the raw material coil through the blister forming machine, vacuum blister forming and cooling, and then automatically cuts it into a g...
  • May 20, 2023
    Shipping from China can be a costly, time-consuming affair. It’s best to familiarize yourself with standard shipping costs and time estimates to avoid disappointment. China is home to many worldwide suppliers, yet shipping from China to the US isn’t always straightforward. In this article, you’ll learn what the most common shipment methods from China are, how long shipping can take, and general pr...
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