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Plastic shape control modification methods
by：CSSSLD
2021-01-23
Article/VIP
plastic injection molding processing in macromolecular chain orderly arrangement in three dimensions is called crystallization, injection molding processing products of crystallization or not influence the performance of its products, plastic in macromolecular chain with one-dimensional or two-dimensional orderly arranged along a specific direction of the phenomenon known as the orientation, orientation can improve the performance of many on the plastic products. If the macromolecular chain when molding plastic products with unbalanced cooling fixed conformation, will leave residual internal stress. Internal stress can lead to the decrease of strength of plastic products, and easy warping deformation.
plastic shape is said plastic products within the state of aggregation or arrangement between the macromolecular chain. Plastic products in macromolecular chain can be disorderly mess pattern, rules can be tidy and orderly arrangement of macromolecular chain that can be arranged in balance conformation, can also be arranged in unbalanced conformation.
plastic shape control of modified plastic products three together form, namely control to achieve our desired performance. Under the external force, by means of adjustment for machining molding process, to control the general form is called self modification, of which the enhancement is the most commonly used. This is a modification of active field at present.
crystallinity positioning crystalline materials within the crystalline part of the volume or the weight percentage of the total material volume or weight, usually not very high, the crystallinity of plastic, the only two plastic polyethylene and ptfe crystallinity is bigger, can reach about 95%. Method of determination of crystallinity, there are many different ways to determine the result of the difference is very big, in the concrete compare the crystallinity of plastic, it is important to note that the unity of test method.
the crystallization of plastic inside the plastic for macromolecular chain form three-dimensional ordered arrangement according to certain rule. Here refers to the law of macromolecular chain arrangement can be folded chain, spiral chain, also can be stretched straight chain. Many plastic can be crystallized, but it is due to the large molecules in the plastic chain length and the diameter of six to one, mutual tangles easily, thus to form a neat and complete crystal is difficult. Plastic crystal has two characteristics: one is the crystal structure is not complete, namely plastic crystal contains more than the molecular crystal lattice defects, 2 it is plastic not fully crystalline degree, there is always a part of crystallization and the other part is not crystalline, so there is a concept of crystallinity.
due to the characteristics of macromolecular chains in the plastic, the plastic has a variety of crystal. In all kinds of plastic crystal type, in addition to the common spherulite, other crystal shape is relatively rare, generally only in special conditions can be get. Plastic has many different crystal forms, a variety of performance differences between different crystal shape is very big, by controlling the processing conditions can get need crystal shape, also can realize different crystal forms of conversion to each other, in order to obtain required performance.
plastic crystallization ability. The crystallization of different varieties of plastic ability is different, some degree of crystallinity can be as high as 90% above, and some degree of crystallinity is close to zero. Plastic inside the higher the symmetry of macromolecular chain, the more easily. More submissive, macromolecular chain segment, the easy to the crystal surface diffusion and arrangement, and thus more easily crystallized. The volume of macromolecular chain containing side group, the greater the crystallization ability is lower, the greater the force between the macromolecular chain, the more influence crystallization ability of macromolecular chain.
more wonderful sharing: 【 Injection molding processing VIP 】 Plastic extrusion coating compound modification, click directly.
or copy the link: http://www. csssld。 cn//html/2016/Trade_0414/202。 HTML
nantong on plastic products factory's official website: http://www. csssld。 Cn / /
source network trimmer/injection molding processing and VIP
plastic injection molding processing in macromolecular chain orderly arrangement in three dimensions is called crystallization, injection molding processing products of crystallization or not influence the performance of its products, plastic in macromolecular chain with one-dimensional or two-dimensional orderly arranged along a specific direction of the phenomenon known as the orientation, orientation can improve the performance of many on the plastic products. If the macromolecular chain when molding plastic products with unbalanced cooling fixed conformation, will leave residual internal stress. Internal stress can lead to the decrease of strength of plastic products, and easy warping deformation.
plastic shape is said plastic products within the state of aggregation or arrangement between the macromolecular chain. Plastic products in macromolecular chain can be disorderly mess pattern, rules can be tidy and orderly arrangement of macromolecular chain that can be arranged in balance conformation, can also be arranged in unbalanced conformation.
plastic shape control of modified plastic products three together form, namely control to achieve our desired performance. Under the external force, by means of adjustment for machining molding process, to control the general form is called self modification, of which the enhancement is the most commonly used. This is a modification of active field at present.
crystallinity positioning crystalline materials within the crystalline part of the volume or the weight percentage of the total material volume or weight, usually not very high, the crystallinity of plastic, the only two plastic polyethylene and ptfe crystallinity is bigger, can reach about 95%. Method of determination of crystallinity, there are many different ways to determine the result of the difference is very big, in the concrete compare the crystallinity of plastic, it is important to note that the unity of test method.
the crystallization of plastic inside the plastic for macromolecular chain form three-dimensional ordered arrangement according to certain rule. Here refers to the law of macromolecular chain arrangement can be folded chain, spiral chain, also can be stretched straight chain. Many plastic can be crystallized, but it is due to the large molecules in the plastic chain length and the diameter of six to one, mutual tangles easily, thus to form a neat and complete crystal is difficult. Plastic crystal has two characteristics: one is the crystal structure is not complete, namely plastic crystal contains more than the molecular crystal lattice defects, 2 it is plastic not fully crystalline degree, there is always a part of crystallization and the other part is not crystalline, so there is a concept of crystallinity.
due to the characteristics of macromolecular chains in the plastic, the plastic has a variety of crystal. In all kinds of plastic crystal type, in addition to the common spherulite, other crystal shape is relatively rare, generally only in special conditions can be get. Plastic has many different crystal forms, a variety of performance differences between different crystal shape is very big, by controlling the processing conditions can get need crystal shape, also can realize different crystal forms of conversion to each other, in order to obtain required performance.
plastic crystallization ability. The crystallization of different varieties of plastic ability is different, some degree of crystallinity can be as high as 90% above, and some degree of crystallinity is close to zero. Plastic inside the higher the symmetry of macromolecular chain, the more easily. More submissive, macromolecular chain segment, the easy to the crystal surface diffusion and arrangement, and thus more easily crystallized. The volume of macromolecular chain containing side group, the greater the crystallization ability is lower, the greater the force between the macromolecular chain, the more influence crystallization ability of macromolecular chain.
more wonderful sharing: 【 Injection molding processing VIP 】 Plastic extrusion coating compound modification, click directly.
or copy the link: http://www. csssld。 cn//html/2016/Trade_0414/202。 HTML
nantong on plastic products factory's official website: http://www. csssld。 Cn / /
source network trimmer/injection molding processing and VIP
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