Method for the manufacture of a functionalised polyolefin, functionalised polyolefin, bicomponent fiber, nonwoven and hygienic absorment product
A technology of functionalized polyolefin and two-component fibers, which is applied in textiles, papermaking, textiles, fabrics, etc., can solve problems such as low tensile strength and poor abrasion resistance, and achieve improved tensile strength and abrasion resistance, The effect of simplifying maintenance and improving efficiency
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Embodiment 1
[0051] Grafting Maleic Anhydride (MAH) onto Polymers
[0052] 98 parts of the polymer to be described in detail below, 2 parts of maleic anhydride (MAH), 2 parts of polypropylene / peroxide masterbatch (available as PEROX PP 5 from Colux (Germany)) were added to the total weight of the masterbatch , which has 5 wt% of 2,5-dimethylene-2,5-bis(tert-butylperoxy)hexane) and 0.1 part of stabilizer (Irganox 1010, available from Ciba) at Coperion Krupp Werner / Grafting was carried out in a Pfleiderer ZSK 25 at a screw speed of 150 / min and a temperature of 180°C.
[0053] The following polymers were used in the grafting process:
[0054] Polymer A: Linear low density polyethylene produced using a constrained geometry catalyst (Affinity*XU 58200.03, available from Dow Chemical Company): 0.913 g / cm 3 ; MFI at 190°C, 2.16kg:30.
[0055] Polymer B: Medium Density Linear Low Density Polyethylene (ASPUN*6806A, available from Dow Chemical Company): 0.930 g / cm 3 ; MFI at 190° C., 2.16 kg:...
Embodiment 2
[0063] Grafting of maleic anhydride on XU 58200.03 under different compounding conditions
[0064] 98 parts of XU 58200.03, 2 parts of maleic anhydride (MAH), 2 parts of the same polypropylene / peroxide masterbatch as used in Example 1 were premixed in a fast rotary mixer. Extrusion was carried out under different grafting conditions in a Theysohn TSK 30 co-speed twin-screw extruder with a length / diameter ratio of 40D.
[0065] The grafted and insoluble fractions in the resulting product were analyzed in relation to the following parameters:
[0066] residence time (t v min,t v max; evaluated by adding masterbatch)
[0067] Mass temperature (TM) in the mold
[0068] Spiral speed (n)
[0069] Extruder filling capacity (M)
[0070] Mass flow rate (m')
[0071] The results are shown in Table 2. The helical configuration is the same as the ZSK 25 helical structure used in Example 1. Samples 17 to 22 used additional kneading ingredients.
[0072] sample
N...
Embodiment 3
[0080] Spinnability of bicomponent fibers in relation to shell component composition
[0081] The spinnability of the bicomponent fibers specified in Table 3 was evaluated. In this table, polymers A, B, C and the control sample are the same polymers as specified in Example 1.
[0082] Sample No.
[0083] As shown in Table 3, in all samples of bicomponent fibers, the core polymer was polypropylene (Inspire * Polypropylene, available from Dow Chemical Company). The shell of all samples is with 0.953g / cm 3 A linear low density polyethylene having a density of 17 and a melt flow index of 17 (190°C, 2.16 kg) was purchased from Dow Chemical Company as Aspun*XU61800.34, and it used 10 wt. % of grafted polymer grafted.
[0084] The spinning process of the fibers was carried out under the following spinning parameters:
[0085] spinning
[0086] Spinneret: 2 x 175 holes = 350 holes in total, 0.4mm
[0087] As-spun fiber denier index: 5.8dpf (denier per filament)
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