Eight commonly used materials and properties of th

Eight commonly used materials and properties of flexible packaging

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core tip: what are the eight commonly used materials of general flexible packaging? How about its performance? The testing technical engineer of Guangzhou Biaoji packaging equipment Co., Ltd. will answer for you one by one. Film material general soft package

What are the eight kinds of materials commonly used in general soft packaging? How about its performance? The testing technical engineer of Guangzhou Biaoji packaging equipment Co., Ltd. will answer for you one by one

what are the eight commonly used materials for general flexible packaging? How about its performance? The testing technical engineer of Guangzhou Biaoji packaging equipment Co., Ltd. will answer for you one by one

1. BOPP is called biaxially oriented polypropylene (Corona value ≥ 38dy/m2)

(1) 5. Due to the molecular orientation and the improvement of crystallinity, its tensile strength, impact strength, rigid toughness, moisture resistance, transparency and cold resistance are all good

(2) non toxic, tasteless, odorless, and can be directly used in contact with food and drugs

(3) no heat sealing

(4) low tear strength, and attention must be paid to the film breaking caused by the film rolling gap

(5) printing or compounding can only be carried out after corona treatment

2, CPP scientific name salivating polypropylene (Corona value ≥ 38dy/m2)

(1), excellent gloss and transparency

(2) moderate strength and excellent moisture resistance

(3) good heat sealing and heat resistance

(4) excellent oil resistance. (better than LDPE)

(5). Non toxic, odorless, tasteless and parasitic

(6) good chemical resistance

(7) poor cold resistance. Polypropylene has low temperature brittleness below 10 ℃ and cannot be used in places below 0 ℃. Polypropylene can

(8). It has high permeability, is easy to generate static electricity, and is easy to absorb dust

3, PE scientific name polyethylene (Corona value ≥ 38dy/m2)

(1), easy to heat seal. Softening temperature ℃, melting point ℃

(2) large elongation, high impact strength, good flexibility and toughness

(3) good water resistance, humidity resistance, chemical resistance and drug resistance

(4). Besides cost, it has excellent low temperature resistance and good softness under low temperature conditions

(5). Non toxic, odorless, tasteless and transparent

(6) high permeability

(7) poor oil resistance and easy oil leakage of packaged oily food

(8) it is easy to generate static electricity

4. Pet scientific name polyester (Corona value ≥ 48dy/m2)

(1), high mechanical strength, can be used in thin cases

(2), good transparency, light transmittance of more than 90%, good gloss. It can absorb ultraviolet rays

(3), good heat resistance, cold resistance, small thermal shrinkage and good dimensional stability

(4) good freshness. The gas resistance is better than PE, and the moisture resistance is similar to PE

(5) good hygiene. It does not contain plasticizers and other substances

5. Bopa. (NY). Scientific name: nylon, polyamide. (Corona value ≥ 52dy/m2)

(1) great strength and toughness, good tensile strength, elongation, tear strength and wear resistance

(2) good puncture resistance

(3) it has excellent low temperature characteristics and can be used at -60 ℃ - 200 ℃

(4) good oil resistance, acid and alkali resistance, drug resistance, organic solvent resistance, and certain gas resistance

(5). It is not easy to generate static electricity and has good printability

(6) easy to absorb water and poor dimensional stability

6. PVC scientific name polyvinylidene chloride (Corona value ≥ 38dy/m2)

(1), good transparency, easy to form

(2). The oxygen permeability and water vapor permeability are smaller than LDPE, and the transmittance of organic solvents is smaller

(3) good coloring, printability and heat sealing

(4) good chemical resistance

(5). It is easy to stretch and a small tension must be used

7, Al foil

(1), good light resistance, moisture resistance and gas resistance

(2) fast heat transfer, easy heating and easy cooling

(3), acid and alkali intolerance

(4), easy to curl and form cracks or wrinkles

(5). The tensile strength is low, and the service tension should be less than 3kg/m2

8、 PT. Scientific name: cellophane

(1) good transparency, gloss and printability

(2 check whether there are water drops at the bottom), high tensile strength, small elongation, good cutting performance and excellent mechanical adaptability

(3). No static electricity or little static electricity, not easy to stick to dust

(4) small tear strength and easy to open

(5) good oil resistance

(6) good heat resistance

(7) good gas resistance

(8) poor water resistance and easy deformation

(9) good hygiene, non-toxic, odorless and tasteless

in addition, Guangzhou standard international currently actively promotes the production and sales of more than 100 detectors of ceramic aluminum new materials in the fields of automobile lightweight, aerospace and ordnance industry, involving the barrier performance testing, thickness testing, physical and mechanical performance testing, sealing performance testing of packaging containers, etc. Since its establishment, adhering to the service concept of "customer-centered", the company has provided comprehensive, professional and accurate packaging product quality control solutions for more than 10000 scientific research institutions, third-party testing institutions and enterprise quality control departments around the world, helping customers start with risk control, improve enterprise quality and safety awareness, and reduce enterprise cost loss