PLA biodegradable drip coffee filter bag is packaging material made from pla corn fiber, non-woven fabric, polylactic acid, with hanging ear and used to pack ground coffee powder product.

How biodegradable drip coffee filter bag is made - the full production process: Polylactic acid extraction - Polylactic acid filter production (PLA non woven) - add hanging ear to non woven fabric - drip coffee filter bag roll! 

The polylactic acid extraction process:

The extraction process of polylactic acid fiber mainly involves two key steps: the production of lactic acid and the preparation of polylactic acid fiber. The following is the detailed extraction process:

1. Production of lactic acid
Raw material preparation: Starch (such as corn, dried potato starch, rice, etc.) is usually used as raw material, with grain bran and wheat bran as auxiliary materials.

Fermentation process:
Starch hydrolysis: Convert starch into glucose through hydrolysis reaction.
Fermentation: Utilize pure lactic acid bacteria to ferment glucose into sodium lactate under the action of biological catalysts.
Purification: After steps such as sodium lactate washing and electrodialysis, Polylactic acid is obtained.

The fermentation process is actually a complex biochemical change process. This biochemical change process is completed in a series of biochemical reactions, and this series of biochemical reactions are all catalyzed by biological catalysts-enzymes. Completed next. Therefore, the fermentation process can also be regarded as an enzyme-catalyzed reaction process.

2. Production of polylactic acid fiber

Preparation of lactide:
Dehydration cyclization: The obtained polylactic acid  is dehydrated and cyclized to form lactide.
Purification: Purify lactide to ensure that its purity meets the requirements of subsequent polymerization reactions.

Polymerization of polylactic acid:
Ring-opening polymerization: The purified lactide is subjected to a ring-opening polymerization reaction to generate polylactic acid.
Spinning process: Polylactic acid can be spun using solution spinning or melt spinning processes to produce polylactic acid fibers - we got pla non - woven from this process.
Performance adjustment: During the spinning process, the properties of the final fiber can be adjusted by controlling factors such as the molecular weight of polylactic acid, the composition and concentration of the spinning solution, drawing temperature, crystallinity of polylactic acid, and fiber diameter.

Feature of drip coffee filter bag:

Polylactic acid fiber is biodegradable, and the following is a detailed explanation of the biodegradability of polylactic acid fiber:

Bio-degradation principle: The degradation process of polylactic acid fiber is divided into two steps. First, high molecular weight polylactic acid is broken into oligomers through hydrolysis of CO on the main chain. This process can be accelerated in acid, alkali or high temperature and high humidity environments. Then, the low molecular weight polymer is further corroded by microorganisms and eventually degrades into carbon dioxide, water and some humic substances.

Bio-degradation conditions: The degradation rate of polylactic acid fiber is affected by many factors, including crystallinity, glass transition temperature and pH value of the medium. When the hydrolysis temperature is higher than the glass transition temperature, the hydrolysis process is accelerated. In addition, acid or alkali can catalyze the hydrolysis of polylactic acid, so the pH value of the medium is also an important factor affecting the degradation rate.

Bio-degradation time: Under composting conditions (temperature 58°C, humidity 98% and microbial conditions), polylactic acid product waste can be completely decomposed into carbon dioxide and water within 3-6 months.

Environmental protection effect: Carbon dioxide and water, the degradation products of polylactic acid fiber, are common substances in nature. They can be converted again into starch, the raw material of lactic acid, through photosynthesis, realizing a cycle of coming from nature and returning to nature. This characteristic makes polylactic acid fiber an environmentally friendly material, which is of great significance for solving the problem of white pollution.

Polylactic acid fiber is recyclable, and its recycling methods mainly include the following:

Recycling of definition: The waste polylactic acid fiber is subjected to mechanical processing, chemical treatment, etc., and then made into new products.
Process: Wasted polylactic acid fibers are collected, cleaned and crushed, and the powder can be processed into polylactic acid products, such as polylactic acid plastics, polylactic acid packaging, etc.
Advantages: This method can make full use of discarded polylactic acid fibers, reduce resource waste, and reduce the production cost of new products.

Physical recycling:
Definition: Polylactic acid products are mechanically crushed and then reprocessed into new products through extrusion, injection molding, etc.
Features: This method is simple and low-cost, but may lead to degradation of material properties.

Chemical recycling:
Definition: Polylactic acid is decomposed into monomers or other low molecular compounds through chemical methods, and then polymerized to prepare new polylactic acid.
Features: This method can maintain the properties of the material, but the cost is higher and the technical requirements are more complex.

PLA fiber is compostable, and here is a detailed explanation of the compostability of pla fiber:

Biodegradability:
Polylactic acid fiber (PLA) is made from renewable biological resources such as corn, wheat and other starch-containing agricultural products as raw materials. After fermentation to generate lactic acid, it is made by polycondensation and melt spinning. Due to the particularity of its raw material source, polylactic acid fiber has good biodegradability.

After products made of polylactic acid fiber are discarded, they can be completely degraded by microorganisms into water and carbon dioxide under composting conditions. This degradation process is environmentally friendly and helps reduce plastic pollution.

Degradation speed:
According to the ISO 14855 standard, polylactic acid (PLA) degrades rapidly in an aerobic composting environment, reaching a degradation rate of more than 80% within 45 days. This means that PLA fibers degrade quite quickly under composting conditions.

Compost Application:
The compostability of PLA fiber makes it safe for use in food packaging. Disposable food packaging materials can be sent directly to composting plants along with leftovers, etc. for composting, and the compost produced can be used for soil improvement and other purposes.

Environmental protection effect:
The compostability of polylactic acid fiber not only reduces the environmental pollution caused by plastic waste, but also promotes the recycling of resources. Through composting, polylactic acid fiber waste can be converted into organic fertilizer, which provides nutrients for plant growth and realizes the resource utilization of waste.

In summary, polylactic acid fiber has good compostability. After being discarded, it can be completely degraded by microorganisms into water and carbon dioxide under composting conditions. It meets environmental protection requirements and helps reduce plastic pollution and promote resource recycling.

Biodegradable drip coffee filter bag works in automatic Drip coffee bag packing machine
Biodegradable pla drip coffee bag filter is ultrasonic sealable and made into film or roll, which means biodegradable pla drip coffee bag works in drip coffee bag packing machine for sure!

How to use or brew the biodegradable drip coffee bag:
Same packing solution as the drip coffee bag, just with different packing materials due to different product between tea and coffee, so it means the brew method is the same.