Plastics are also called synthetic resins, mainly because the most important application of synthetic resins is to make plastics. In order to facilitate processing and improve performance, additives are often added, and sometimes they are directly used for processing and forming, so they are ofte...
Synthetic resin is a polymer compound, which is produced by combining low molecular raw materials – monomers (such as ethylene, propylene, vinyl chloride, etc.) into macromolecules through polymerization. Polymerization methods commonly used in industry include bulk polymerization, suspensi...
The secretions of some trees often form resins. As early as 1872, German chemist A. Bayer first discovered that phenol and formaldehyde can quickly form reddish-brown lumps or sticky substances when heated under acidic conditions, but they cannot be purified by classical methods. and stop the exp...
Many things around us have common names and elegant names. For example, a green plant commonly known as “Lala seedlings” is elegantly called “humus”. In fact, plastics also have elegant names.
Plastics are monomers as raw materials and polymerized by polyaddition or polyco...
The shrink film has high puncture resistance, good shrinkage and certain shrinkage stress. Mainly used in the sales and transportation process of various products to stabilize, cover and protect products. Shrink packaging not only looks beautiful, but also plays the role of moisture-proof, dust-p...
The vest bag is a kind of common plastic bag. As for why it is called a “vest bag”, as the name suggests, it is determined by its appearance: its shape resembles a vest, hence the name. The vest bag is simple to make and has a wide range of uses. It has become an indispensable necessi...
Plastic bags are bags made of plastic as the main raw material. They are indispensable items in people’s daily life and are often used to hold other items. It is widely used because of its cheapness, extremely light weight, large capacity and easy storage. How is the thickness of plastic ba...
How to measure the specifications of plastic bags? There are various types of plastic bags, and the measurement methods are also different. Today, we will share the measurement methods of 3 common plastic bags in daily life:
Measurement of flat pockets: The method of measuring flat pockets is ver...
In the pharmaceutical industry, plastics can be used to hold medicines, but not all plastics can hold medicines and must be qualified medical plastics. So, what kind of drugs can medical plastics hold?
There are many types of medicines that can be contained in medical plastic bottles, which can b...
Plastics of different materials have different melting points:
Polypropylene: The melting point temperature is 165°C—170°C, the thermal stability is good, the decomposition temperature can reach above 300°C, and it begins to turn yellow and deteriorate at 260°C in the case of contact with o...
Woven bag is a kind of plastic, and its raw materials are generally polyethylene, polypropylene and other chemical plastic raw materials. , bagged.
As far as the sewing process indicators are concerned, which ones should we focus on?
Sewing strength index: The main factors that affect the suture...
Is it harmful to put plastic bags in the refrigerator? In response to this, there have also been experiments conducted by relevant research institutions, and the final experiments have shown that the so-called “plastic bags cannot be placed in the refrigerator” are pure rumors.
The ex...
