Nowadays, with the increasing awareness of environmental protection, green pollution-free degradable plastic products are vigorously promoted.

Sinyar has cooperated with many domestic laboratory materials experts, spent 2 years breaking through three industrial chains and developing three kinds of stretch film: recyclable stretch film, degradable stretch film and bio-based stretch film, Sinyar named the three stretch films the Singreen series. These are providing all walks of life with the required green and environmentally friendly packaging solutions, and contributing to the environmental protection of the earth.

Singreen Series-PCR Recyclable Stretch Film

Both savvy shoppers and consumer packaged goods companies are placing more emphasis on sustainability, reducing waste, and using less energy. As a brand owner, your sustainability goals are more important now than ever, as consumers begin seeking out brands focused on the environment.  Learn more about this article of PCR recyclable stretch film.

When it comes to packaging, it’s no surprise that brands are looking for eco-friendly packaging. While recyclable or compostable packaging is the two most common types of sustainable packaging, there is a third choice gaining traction on the shelf – post-consumer recycled (PCR) packaging.

Raw material manufacturers make GRS-certified recyclable material particles through the collection of Marine garbage and household garbage. Sinyar adds a certain proportion of certified recyclable raw material particles on the basis of the original formula to make a wrapping film containing PCR recycled material components and applies for GRS certification, thus achieving the environmental protection concept of plastic reduction and carbon emission reduction.

The full name of PCR is Post-ConsumerReydedmatral, short for PCR, which is usually made of new plastic particles after the waste plastic is recycled, sorted, cleaned and granulated by the recycling system. The plastic particles have the same structure as the plastic before recycling. When the new plastic particles are mixed with the original resin, a variety of new plastic products can be created. This approach not only reduces carbon dioxide emissions, energy consumption, and environmental pollution. PCR stands for post-consumer recycled plastic. It’s derived from end user products that have reached the end of their life cycle like PET clear water bottles, HDPE milk jugs and shopping bags. The material is collected, cleaned and sorted, processed and becomes useable in place of virgin plastic.

PCR Recyclable Stretch Film Technical Specifications

Specification	Cast Film
Thickness	17 / 20 / 23
Width (mm)	500
Length (m)	Up to 2300

 

GRS Certification

GRS (Global Recycling Standard)

GRS is an international, voluntary and comprehensive product standard that regulates the content of recall and the chain of custody, society and environment of production and marketing.

Third-party certification requirements for environmental practices and chemical restrictions. The goal of GRS is to increase the use of recycled materials in products.

Reduce and eliminate all kinds of hazards caused by production. GRS standard is applicable to the recovered content of 20% or more.

The product. And applicable to any accepted recycled material, applicable to any supply chain. Applicants for GRS certification must meet the requirements

Its traceability, environmental protection, social responsibility, regeneration marks and general principles of the five aspects of the requirements.

The new GRS certification is a three-tier system, divided into copper, silver and gold standards based on the recycling criteria for each product.

The gold standard requires products to contain 95% to 100% recycled materials;

Silver standard products contain 70% to 95% recycled materials;

Copper standard products contain no less than 30% recycled material.

 

PCR recyclable stretch film advantage

1. Compared with “traditional” garbage abandonment, recycling raw materials as much as possible helps to minimize crude oil and protect limited natural resources, reduce greenhouse gas emissions and realize the concept of environmental protection.
2. Recycling can prevent the waste of potentially valuable resources and reduce raw material consumption, thus reducing energy consumption, air pollution (self-waste incineration) and water pollution (self-landfill). In line with the national plastic reduction, double carbon policy, reduce carbon emissions.
3. Recycling plastic saves landfill space.

Singreen Series-Degradable Stretch Film

The mainstream degradable stretch film biodegradable plastic film roll on the market is PBAT+PLA. Sinyar launched the most suitable solution for the biodegradation of stretch film biodegradable plastic wrap-Chitosan Degradable Stretch Film. You can also read more about degradable stretch film in this blog.

 

Principle of chitosan biodegradable stretch film

1. The chitosan biodegradable stretch film biodegradable pallet wrap will maintain the integrity of the product for 24 months before the beginning of physical degradation. Since the molecular weight of polyolefins ( such as polyethylene ) is in a large range, usually 250000, they are not easy to be biodegraded by bacterial and fungal activities at this molecular weight.

2. 

   The molecular weight of polyethylene is reduced to below 10000 through the oxidation of the biological catalyst chitosan. This long-chain C-C single bond of polyethylene breaks into a hydrophilic carbon-oxygen double-bond carbonyl group due to the induction of chitosan.

3. The breaking (degradation) of the long chain C-C single bond of polyethylene leads to the continuous reduction of the molecular weight of the polymer, which ultimately results in acute embrittlement, micro-fragmentation and subsequent availability for biodegradation.

 

Conclusion:

In short, the chitin-degradable biofilm contains components that can attract biomass, enabling insects and other microorganisms to digest the chitin-degradable biofilm and decompose it into CO2, H2O and organics.

 

Experimental method: 

A precise standard method in the study of biochemical mechanisms is adopted, which is called the isotope tracing method. It is carbon-13 labeled polystyrene and wheat bran that is fed to Tenebrio Molitor. compostable pallet wrap

 

COMPARISON OF PBAT+PLA AND CHITOSAN STRETCH FILMS

PBAT+PLA	Chi tosan
The stretch film of PBAT+PLA has a short life cycle and a degradation period of 3-5 months. In the process of using the product, it is easy to age and crack. If the PBAT+PLA stretch film is used to wrap the items, there may be a danger of the items being dumped.	The life cycle of chitosan stretch film is 24 months, and the degradation period is 12-24 months, which is more suitable for the needs of stretch film. Its’ physical properties are better than PBAT. The functionality of the stretch film does not change during 24 months of use.
PBAT+PLA stretch film is compostable degradable plastic, which needs to be degraded under certain composting conditions, and the implementation conditions are relatively high. Full degradation cannot be achieved in the natural environment.	PBAT+PLA stretch film is compostable degradable plastic, which needs to be degraded under certain composting conditions. Full biodegradation can also be achieved under natural conditions.
The cost of PBAT+PLA stretch film is high, which is not recognized by many countries	The cost of chitin stretch film is controllable.

 

Singreen Series-Bio-based Stretch Film

The bio-based stretch film is widely used in the market of Japan and South Korea. The material is made of starch, sugarcane, shell and other natural materials.
Usually, add 10% ~ 30% of the ingredients of biological base products, raw materials are more environmentally friendly. It is currently applying for USDA Bio-based certification licensed by the United States Department of Agriculture.

 

Advantages of bio-based stretch film:

1.  The raw material is green and natural, reducing the use of crude oil from the source
2. Small pollution to the ecosystem
3. Compared with ordinary LLDPE stretch film, it can not only reduce carbon emissions but also absorb carbon dioxide

 

 

Comparison of CO2 emission

①Petrochemical PE⇒ 4.5kg CO2 was discharged

②Green PE               ⇒ 1.3kg CO2 was discharged

                                     ⇒ ▲3.2kg Reduction

Burning 1L of gasoline produces 2.3㎏ CO2.   ▲3.2kg Reduction equivalent to about 1.4L of gasoline saved!!

 

Singreen stretch film PDF