What is PVDC? What kind of material is PVDF?

PVDC is a plastic with a softening temperature of 160-200 °C, which is used in retort pouches, plastic products for medical packaging.

For PVDC plastics, due to their strong intermolecular cohesion and high crystallinity, the chlorine atoms in PVDC molecules are hydrophobic and will not form hydrogen bonds, and it is difficult for oxygen molecules and water molecules to move in PVDC molecules, so that they have excellent oxygen resistance and moisture resistance, and their oxygen resistance is not affected by the humidity of the surrounding environment.

Under any temperature or humidity conditions, it has excellent ability to block water vapor, oxygen, odor and fragrance, and is currently recognized as the best comprehensive performance of plastic packaging materials in terms of barrier properties.

PVDC, scientific name "polyvinylidene chloride", is a thermoplastic polymer with a softening temperature of 160-200 °C, with a linear polymeric chain structure linked to each other. The molecular structure is symmetrical and the crystallinity is high.

For PVDC, due to its strong intermolecular coagulation and high crystallinity, the chlorine atom in the PVDC molecule is hydrophobic and will not form hydrogen bonds, and it is difficult for oxygen molecules and water molecules to move in the PVDC molecule, so that it has excellent oxygen resistance and moisture resistance, and its oxygen resistance is not affected by the humidity of the surrounding environment. That is to say, under any temperature or humidity conditions, it has excellent ability to block water vapor, oxygen, odor and fragrance, and is currently recognized as the best comprehensive performance of plastic packaging materials in terms of barrier properties.

The use of PVDC's gas barrier can delay the occurrence of food oxidation and deterioration, greatly extend the shelf life of products, and at the same time avoid the loss of fragrance of the contents and prevent the invasion of external bad odors.

Its moisture resistance can prevent the product from losing water and drying out and the taste from deteriorating, and will not damage the packaging prototype due to water absorption, and prevent natural loss (weightlessness) of quantitative products. The gas blocking performance does not change with the change of humidity, and will not cause product deterioration even in a high humidity environment;

Thanks to its low permeability, it prevents aroma loss and does not absorb residual odors and abnormal tastes, ensuring odor integrity (this is especially important when packaging low-fat or high-protein foods).

Excellent weather resistance, even if it is exposed to the outdoors for a long time and directly exposed to sunlight, it will not cause fading and aging of the packaging.

Safe and environmentally friendly, in line with food hygiene requirements, through FDA (Food and Drug Administration) certification, escort food packaging safety.

Main application fields: cheese, soup, snacks, retort pouches, medical packaging, dry food packaging, biscuits and cereals, pet food, stretch upper and lower films, sauces, meat products, liquid packaging, soy product packaging, electronic product packaging, chemical packaging and other fields. It can withstand 125 30min cooking.

Is there a pvsc material to buy kuay grains?

PVDF isPolyvinylidene fluoridePolyvinylidene fluoride is a highly non-reactive thermoplastic fluoropolymer that can be polymerized by 1,1-difluoroethylene.

Synthesis. Vinylidene fluoride homopolymer or vinylidene fluoride and other small amounts of fluorinated vinyl monomer copolymer, it has the characteristics of fluororesin and general resin, in addition to good chemical corrosion resistance, high temperature resistance, oxidation resistance.

In addition to weather resistance and radiation resistance, it also has special properties such as piezoelectric, dielectric and thermoelectric, with a global annual production capacity of more than 10,000 tons.

Applications of PVDF materials:

Applications are mainly concentrated in petrochemical, electrical and electronic and fluorocarbon coatings.

In the three fields, PVDF is one of the best materials for pumps, valves, pipes, pipe fittings, tanks and heat exchangers for the whole or lining of the fluid handling system of petrochemical equipment due to its good chemical resistance, processability, fatigue and creep resistance.

Good chemical stability and electrical insulation properties, so that the equipment can meet the requirements of TOCS and flame retardant, is widely used in the semiconductor industry storage and transportation of high-purity chemicals, the use of PVDF resin made of porous membranes, gels, separators, etc., in lithium secondary batteries, this use has become one of the fastest growing markets for PVDF demand.

It is one of the most important raw materials for fluorocarbon coatings, and the fluorocarbon coatings prepared from it have been developed to the sixth generation, because PVDF resin has super weather resistance, it can be used outdoors for a long time without maintenance, and this kind of coating is widely used in power stations, airports, highways, and high-rise buildings.

Wait. In addition, PVDF resin can also be blended and modified with other resins, such as PVDF and ABS resin.

The composite materials obtained by blending have been widely used in construction, automobile decoration, home appliance shells, etc.

The above content reference: Encyclopedia-pvdf

PVDF film is a kind of film material based on PVC film improvement, mainly on the surface of PVC film PVDF resin coating, so that the performance of the film has been further improved, and the service life has been increased to more than 15 years.

PVDF is a kind of building membrane with high mechanical strength, its performance has been greatly improved compared with PVC membrane, and has now become the most commonly used membrane material in membrane structure carport, its advantages are many such as: good self-cleaning, good flame retardant, high strength, good flexibility, not easy to break, cost-effective, short production cycle, fast construction speed, etc.

1. PVDC is an ideal packaging material with high barrier, strong toughness, low temperature heat sealing, heat shrinkage and chemical stability, which is unique in the packaging industry.

2. In particular, it has the properties of moisture resistance, oxygen resistance, moisture resistance, acid and alkali resistance, oil immersion resistance and resistance to a variety of chemical solvents, and has been widely used in the packaging of food, medicine and military products for 50 years. PVDC is a copolymer with vinylidene chloride as the main component, and the homopolymer has not been industrialized because pure PVDC is difficult to process and apply. In the 30s of the last century, the United States DOW Chemical Company successfully developed VDC-VC copolymer, and named SARAN, and launched the VDC-MA series in the 80s, therefore, the so-called PVDC industry also refers to the copolymer polymer industry with VDC as the main body.

PVDC is a common plastic material, the full name is polyethylene-chloride-vinyl acetate copolymer. It has good physical and chemical stability, is a high oxygen barrier material, can effectively block oxygen, water vapor and gas malpractice groups, but also can well protect food, medicine and cosmetics and other products.

PVDC has good transparency and can be used to make transparent packaging materials. At the same time, it has high strength, is not easy to break, and is difficult to be torn, which ensures the safety of the packaging. Due to its gas resistance and good fit, PVDC material can be used to make high-quality packaging bags and plastic wrap.

In addition, PVDC also has good chemical stability, can resist acid, alkali and moisture, thus increasing the shelf life of food and medicine. Especially for those high-grade food and health products that need to be stored for a long time, the use of PVDC materials can greatly increase their storage life.

In conclusion, PVDC is a high-performance coarse, multi-functional synthetic material that is widely used in food, medicine, cosmetics and other industries. With the development of technology and continuous exploration, it is believed that the application range of PVDC materials will continue to expand.