Soluções para diferentes pontos de cristal de filme protetor PE

Guangdong Huaping Hygiene Material Industrial Co.,Ltd. main products include PE protective film,PE breathable film,PE perforated film,Multicolor printed film,Nonwoven Laminated film,Anti-counterfeiting Holographic film etc .We have introduced the main crystal point types, identification methods, causes and countermeasures in detail above. It can be summed up as follows:

①Use a hot stage polarizing microscope to identify different types of crystal points

Pollutants can be seen under the microscope – crystal points of foreign pollutants; clear crystal points or degradation products can still be seen after heating and melting the main body of the film – highly crosslinked/oxidized crystal points; crystal points after heating and melting the main body of the film Disappeared, but the crystal point can be seen again after cooling down—slightly crosslinked crystal point; the crystal point disappears after the main body of the film is heated and melted, but the crystal point does not recover after cooling—the crystal point with poor plasticization.

②Medidas para lidar com pontos cristalinos de poluentes estranhos

Improve the cleanliness of the workshop; improve the material storage and transportation process to keep the resin packaging bags clean; strictly control the production order and avoid cross-contamination between different types of raw materials when batching.

③ Countermeasures for cross-linking/oxidation crystal points

Replacing raw materials with fewer batches of crystal points; lowering the processing temperature; adding additional antioxidants; optimizing equipment, replacing with designed screws, etc.

④ Countermeasures for plasticizing poor crystal points

Evitar misturar pellets e pós; preste atenção ao processo de bombeamento de partículas de matéria-prima para evitar pó de matéria-prima devido à fricção; evitar a mistura simples de matérias-primas com pontos de fusão muito diferentes;

Se a fórmula exigir que as matérias-primas com grandes diferenças no ponto de fusão sejam misturadas; a temperatura da primeira e segunda áreas do parafuso precisa ser reduzida para evitar o derretimento prematuro de matérias-primas de baixo ponto de fusão e, ao mesmo tempo, a tela do filtro pode ser mais densa para aumentar o cisalhamento da seção de medição.

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