Richest Pack Limited

Home > News > The materail original of plastic packaging bags

The materail original of plastic packaging bags

2018-11-16

In fact, we see a variety of Food Packaging Bags have, but we usually use food packaging materials is not a pure material, it is made up of many materials.Among them high polymer polymer (or call synthetic resin) it is plastic main composition, in addition, in order to improve the performance of plastics, but also in the polymer to add a variety of auxiliary materials, such as filler, plasticizer, lubricant, stabilizer, colorant, etc., in order to become a good performance of plastics.What are the main raw materials for food packaging bags?

1. Synthetic resin

Synthetic resin is the most important component of plastics, its content in plastic is generally 40% ~ 100%.Because of its large content and the properties of resins that often determine the properties of plastics, resins are often considered synonymous with plastics.For example, polyvinyl chloride resin and polyvinyl chloride plastic, phenolic resin and phenolic plastic confused.Actually resin and plastic are two different concepts.Resins are raw polymers that are used not only to make plastics, but also to make paints, adhesives and synthetic fibers.And plastic contains 100% outside very few resins, great majority of plastics, besides main component resins, still need to add other material.

2. Stabilizer

In order to prevent synthetic resin in the process of processing and use by the role of light and heat decomposition and damage, extend the service life, to add stabilizer in the plastic.Commonly used are stearate, epoxy resin and so on.

3. Colorant

Colorants give plastics a variety of bright, beautiful colors.Organic dyes and inorganic pigments are commonly used as colorants.

4. Lubricant

The function of lubricant is to prevent the plastic from sticking to the metal mold when forming, and to make the plastic surface smooth and beautiful.Commonly used lubricants are stearic acid and calcium magnesium salt.

In addition to the above additives, flame retardant, foaming agent, antistatic agent can be added to plastics to meet the different requirements of use.

5, packing

Fillers, also known as fillers, increase the strength and heat resistance of plastics and reduce their cost.For example, wood powder added into phenolic resin can greatly reduce the cost, making phenolic plastic become one of the cheapest plastics, but also can significantly improve the mechanical strength.Fillers can be divided into organic fillers and inorganic fillers, the former such as wood powder, rags, paper and a variety of fabric fibers, etc., the latter such as glass fiber, diatomaceous earth, asbestos, carbon black and so on.

6. Plasticizer

Plasticizer can increase the plasticity and softness of plastics, reduce brittleness and make plastics easy to be processed and formed.Plasticizers are generally miscible with resin, non-toxic, odorless, light, heat stable high boiling point organic compounds, the most commonly used phthalates.When producing polyvinyl chloride plastic for example, if join more plasticizer to be able to get soft qualitative polyvinyl chloride plastic, if do not add or add plasticizer less (dosage < 10%), get hard polyvinyl chloride plastic.

Second, the food packaging bag of raw materials to form a style

1. Special plastics

It is to point to have special function commonly, can be used at aviation, aerospace the plastic of special application domain.For example, fluorine plastics and silicone have outstanding high temperature resistance, self-lubrication and other special functions, reinforced plastics and foam plastics have high strength, high buffer and other special properties, these plastics belong to the category of special plastics.

2. Universal plastic

It is to point to output is big commonly, use is wide, formative sex is good, the plastic with cheap price.General purpose plastic has 5 kinds, namely polyethylene, polypropylene, polyvinyl chloride, polystyrene and ABS.They're all thermoplastics.General engineering plastics include: polyamide, polyformaldehyde, polycarbonate, modified polyphenyl ether, thermoplastic polyester, ultra-high molecular weight polyethylene, methyl pentene polymer, vinyl alcohol copolymer, etc.

3. Engineering plastics

Generally refers to the ability to withstand certain external forces, with good mechanical properties and resistance to high and low temperature performance, dimensional stability, can be used as a plastic engineering structure, such as polyamide, polysulfone.In engineering plastics, it is divided into general engineering plastics and special engineering plastics.

4. Special engineering plastics

Special engineering plastics can be divided into cross-linked and non-cross-linked plastics.Cross-linked: polyurethane bimaleamide, polytriazine, cross-linked polyimide, heat resistant epoxy tree fingers.Non-crosslinked: polysulfone, polyether sulfone, polyphenyl sulfide, polyimide, polyether ether ketone (PEEK).


Related Products List

Home

Product

Phone

About Us

Inquiry

We will contact you immediately

Fill in more information so that we can get in touch with you faster

Privacy statement: Your privacy is very important to Us. Our company promises not to disclose your personal information to any external company with out your explicit permission.

Send