Plastic bags with identification of toxic hazards?

October 7, 2008 on 6:19 pm | In Tech | No Comments

Many farmers markets, supermarkets are in a plastic bag loaded with food, in fact, there are a lot of toxic plastic bags, especially the colorful plastic color, which is in itself contains a lot of toxins. Because the color of renewable plastic bags belonging to the use of coloring agents usually contain benzo topiramate, is a highly carcinogenic substance, and access to food, could be transferred to the food, people with chronic poisoning. In addition, the latest research shows that plastic products is also a plasticizer carcinogen, and the regeneration process as simple and plastics and other reasons, its plasticizer with food, especially oily food more easily contact effusion.

“People used to use ‘drug bags’, is both a victim of a carcinogen, unwittingly acting as a disseminator of the carcinogen.” Tongji University School of Medicine professor of environmental medicine Shu-Guang Li cautioned that a number of shops as soon as possible with thin The thin, with a sharp smell of renewable plastic bags loaded food like deep-fried dough sticks, carcinogenic substances leaking faster and more dangerous.

In that case, how to identify whether a plastic bag so toxic?

Sensory test: non-toxic plastic bags were white, translucent or colorless and transparent, hand-lubricating sense of touch from time to time. The toxic plastic colors were turbid, or yellow, tacky feel.

Water test: a plastic bag placed in the water, and into the bottom, non-toxic plastic surface can be toxic to sink a plastic bag.

Jitter test: a plastic bag with their hands to seize the end of the shaking force, sent to drug-free clear voice, the voice of those stuffy Shibuya toxic.

Fire detection: non-toxic flammable polyethylene plastic, blue flame, burning like a candle drip like tears, paraffin smell. Toxic PVC plastic is not flammable, which put out the fire away from the issue of irritating odor.

Double-screw extruder process flow

October 6, 2008 on 12:01 pm | In Tech | No Comments

Double-screw extruder process flow


Double-screw extruder

Technological flow sheet

Engaged in technological quality control mainly, work out quality and
craft and control the file , production flow chart , the quality system is
maintained .

Masterbatch of production technology

October 2, 2008 on 10:51 pm | In Tech | No Comments

Color masterbatch with the requirements

Masterbatch pigment used, it should be noted pigment and plastic raw materials, with the relationship between the agent, the main points of their choice, as described below.

(1) of the pigment and resin and can not react to a variety of additives, strong solvent, the migration of small, good heat tolerance and so on. In other words, the masterbatch can not participate in a variety of chemical reactions. Such as carbon black can be controlled by the curing reaction of polyester plastics, polyester so you can not add carbon black pigment.

As the plastic forming a high temperature, the pigment forming in the heating temperature does not break down color. Inorganic pigments generally good heat resistance, organic pigments and dyes less heat resistance, which should be in the selection of varieties of pigment caused enough attention.

(2) of the pigment dispersed, force should be good coloring. Uneven pigment dispersion, the products will affect the appearance of performance; coloring pigment force poor, would increase the amount of pigment, raising the cost of materials. At the same pigment dispersed in various resin and coloring power is not the same, so they should pay attention to the selection of pigment.

The pigment particle size and dispersion relations have, the smaller the particle size pigment, dispersion, the better, the coloring is also strong.

(3) should be aware of the other properties of pigment, such as for use in food, children’s toys on the side of the plastic products, the requirements should be non-toxic pigment; for the electrical side of the plastic products, electrical insulation should choose a good color; Respect for outdoor plastic products, to choose an aging weather-resistant properties of pigment, and so good.

2. Masterbatch production process

Masterbatch production process is very strict requirements, generally wet process. Masterbatch by the water with abrasive material, phase change, washing, drying, granulation formed, is the only way the quality of products can be guaranteed.

In addition to deal with paint in the ground at the same time, but also to carry out a series of testing, such as the determination of the small size sanding, sanding determination of the proliferation of serous performance, sanding determination of the size of solid content as well as the determination of color, such as fineness of the project.

Masterbatch production process is expected in four ways:

(1) ink method: As the name suggests, is in the ink adoption of masterbatch production Colorants production methods, that is, through the three-roll grinding, in the paint coating on the surface layer of low-molecular-weight protective coating. After the fine grinding paste and another carrier resin mixture, then roll plastic Xiaolian II aircraft (also known as twin-roll machine open chain), plastics, the last single screw or twin-screw extruder for granulation.

The process is as follows:
Stir ingredients coarse paste three-roll grinding paste two small plastic roller chain out of grain
(2) Irrigation: paint, water and dispersant through sanding, so that the pigment particles of less than 1μm, and through the phase-transfer law, so that the pigments into the oil phase, and then drying system was masterbatch. When compared to the need to use organic solvents, as well as the appropriate solvent recovery unit. Its flow chart is as follows:
Fine color wash evaporation Nongsu Liao joined the carrier out of dry granulation

(3) legal pinch: The paint is oil-based carrier and mixing, the use of the color characteristics of the oil by make Kneading paint from the wash water into the oil phase. At the same time, the carrier will be oily paint coating on the surface, so that the pigment dispersion stability and cohesion to prevent the paint.

(4) metal soap method: After paint is the size after grinding to reach around 1μm, and to a certain temperature by adding liquid soap, paint particles on the surface of each layer evenly by the wetting liquid soap dispensers to form a layer of liquid saponification, After adding salt solution and in the paint layer on the surface of the saponification reaction and generate a layer of protective coating of metal soap (magnesium stearate), so that so that the ground after the pigment particles will not give rise to the phenomenon of flocculation, and a certain degree of protection Fineness.

3. Masterbatch use Notes

(1) masterbatch stored for a period of time after moisture absorption, in particular, PET, ABS, PA, PC, and so on, the color tablets according to the same drying process and achieve the requirements of water.
(2) with color masterbatch together to achieve the required color must be very careful, and often occurs light and color.
(3) and other additives masterbatch reaction will be, used to pay attention.
(4) than the dilution of the masterbatch selection should be noted. Selection of high dilution ratio, the lower the cost of production, but also by the processing equipment.

Scent polyolefin masterbatch

October 2, 2008 on 10:29 pm | In Products | No Comments

1. Introduction
Polyolefin masterbatch fragrance is a given polyolefin (PE, PP, etc.) a certain fragrance materials functional masterbatch.

2. the performance characteristics of
1, good temperature
In the normal plastic processing temperatures, used in the evaporation loss perfume and flavor of its role in the destruction of the structure is not clear
2, lasting fragrance

Due to fully consider the essence of the ingredients of sustained-release request, in the formula used in a wide range of help to control the release of the flavor components, and
In the masterbatch in the preparation for a special process.
Usually the polyolefin masterbatch can smell the six months to two years to maintain.

3:the use of

Usage: 1 to 4% (can also be manufactured in accordance with the specific requirements of choice) will be the ratio of masterbatch resin mixed with the raw materials can be used after the uniform.

4:IV Notes
1, with good material should be used as soon as possible, not parking too long.
2, the mother is expected to open as soon as possible after the use of packaging.
3, the packaging not use up all the time after the mother is expected to be fully sealed and packaged.

Color Toner Service

October 2, 2008 on 10:20 pm | In Business | No Comments

Plastics processing when the color difference is caused by many factors, including:

1. Injection process of change

2. Change the background color of the raw materials

3. Injection molding machine cleanliness of

4. Materials under the doors of cleanliness

5. Color Produced by powder deviation

6. Dispersant use of improper

7. I poured with inappropriate material

8. Mixer cleanliness of

9. Mixing time control

In order to solve the problem of rendering existing customers, we stand ready to solve problems for customers, and strive to be accurate, fast, high quality, low cost, quality assurance, so customer satisfaction.

Flame-retardant masterbatch

October 2, 2008 on 10:17 pm | In Products | No Comments

I. Introduction:
High-performance flame-retardant masterbatch selection of high-performance series of flame retardants, the unique preparation, not only with reliable fire-retardant, and has good
Good dispersion and resin matrix of compatibility for ABS, HIPS resin.

II, the major technical indicators:
Project: Technical indicators
Appearance: uniform particles
Flame retardant: V-0, V-1, V-2, HB-class
Migration of resistance: ≥ 4 level

III, the use of ratio and methods:
Flame-retardant materials will be home to 1:3-1:4-1:5 resin and raw materials (in accordance with the requirements and fire-retardant resin species may be) evenly mixed, some of the dried product.

How to Color Masterbatch

October 2, 2008 on 8:37 am | In Tech | 1 Comment

high percentage of pigments and additives and thermoplastic resin, as well dispersed by the plastic colorants, their choice of resin stain on the good wetting and dispersion, and coloring materials with good Components : Color + vector + additive = Color Masterbatch use of the advantages of colored thermoplastic commonly used method of coloring: the color pigment and resin colorant grain mixture into a mixing colored plastic, for the molding process.

Coloring the dry powder resins stain color and mix evenly and directly used in the manufacture of plastic products. Color masterbatch today’s most commonly used method of coloring plastics.

By the high percentage of pigments and additives and thermoplastic resin, as well dispersed by the plastic colorants, their choice of resin stain on the good wetting and dispersion, and coloring materials with good compatibility.

Components: Color + vector + additive = Color Masterbatch
The use of the advantages of coloring masterbatch

Thermoplastic commonly used method of coloring:
The color pigment and resin colorant grain mixture into a mixing colored plastic, for the molding process.
Coloring the dry powder resins stain color and mix evenly and directly used in the manufacture of plastic products.

Color masterbatch today’s most commonly used method of coloring plastics. Vector in the spread of colorants, and simple color resin mixture used in the manufacture of plastic products after.
Masterbatch coloring significant advantages include:
Easy to use, the shape of the environment pollution-free.

Color uniformity, stability, improve the quality of plastic parts.
Easily measurable, application of a high degree of automation of production systems forming.
Can be colored, anti-aging agent, anti-static agent in one set, made of multi-function Masterbatch, user-friendly.

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